КОМПРЕССОР ХОЛОДИЛЬНОГО АГЕНТА

Изобретение относится к холодильной технике. Компрессор (10) холодильного агента содержит общий корпус (12) с двигательной секцией (22) корпуса, в которой расположен двигательный отсек (98) с предусмотренным в нем электродвигателем (102), содержащим статор (172) и ротор (174), и с компрессорной секцией (24) корпуса, в которой расположен компрессорный блок (26). Общий корпус (12) имеет первую крышку (14) и вторую крышку (18), между которыми простирается корпусная гильза (16), образующая вышеупомянутые двигательную (22) и компрессорную (24) секции корпуса. Компрессорная секция (24) корпуса имеет корпус (52) блока цилиндров с головкой (56) блока цилиндров, имеющей нижнюю часть (62) с расположенными в ней цилиндрами (54), монолитно сформованную на корпусе (52) блока цилиндров и несущую замыкающую цилиндры (54) клапанную плиту (64), причем на клапанной плите (64) с противоположной нижней части (62) головки блока цилиндров стороны расположена верхняя часть (66) головки блока цилиндров с по меньшей ...

ПАРОКОМПРЕССИОННАЯ УСТАНОВКА

Изобретение относится к парокомпрессионным установкам, работающим по разомкнутому циклу, принцип действия которых основан на создании в камере разрежения, сопровождающегося кипением и испарением жидкого рабочего тела, последующего сжатия полученного пара и его конденсации в камере конденсации (обратный цикл Карно). Парокомпрессионная установка содержит испаритель с патрубками подвода и отвода рабочего тела, конденсатор с патрубком отвода конденсата, снабженный электродвигателем и герметичным корпусом компрессор. Вход компрессора сообщен с полостью испарителя, а выход сообщен с полостью конденсатора через кольцевой диффузор с наружной обечайкой. Полости испарителя и конденсатора гидравлически изолированы друг от друга. Электродвигатель размещен в герметичном корпусе и снабжен каналом жидкостного охлаждения герметичного корпуса. Кольцевой диффузор дополнительно оснащен внутренней обечайкой, образующей полость, в которой размещен электродвигатель. Вал ротора электродвигателя консольно закреплен ...

Привод компрессора теплонасосной установки

ХОЛОДИЛЬНЫЙ КОМПРЕССОР

... 1. Холодильный компрессор с закрытым корпусом, в котором расположен компрессорный агрегат, включающий в себя компрессорный блок и электродвигатель, содержащий статор и ротор, выполненный с возможностью вращения вокруг оси вращения, отличающийся тем, что между корпусом (2) и компрессорным агрегатом (3) предусмотрены по меньшей мере два защитных приспособления (17, 18), действующие в плоскости, перпендикулярной указанной оси вращения, причем эти защитные приспособления (17, 18) расположены на расстоянии от оси вращения.2. Компрессор по п.1, отличающийся тем, что в осевом направлении компрессорный агрегат (3) удерживается в корпусе (2) пружинными элементами (13, 14), в частности, четырьмя пружинными элементами.3. Компрессор по п.1, отличающийся тем, что каждое защитное приспособление (17, 18) содержит первый элемент (19) и второй элемент (20), причем первый элемент (19) является упруго деформируемым в направлении указанной плоскости, а второй элемент (20) является жестким в направлении указанной ...

Герметичный компрессор

Холодильный агрегат

Устройство для смазки компрессора

Фреоновый герметичный компрессор

Всасывающий патрубок холодильного компрессора

Стенд для испытания герметичного холодильного компрессора

УСТРОЙСТВО ДЛЯ СМАЗКИ ГЕРМЕТИЧНОГО КОМПРЕССОРА

Фреоновый герметичный компрессор

Герметичный компpeccop

Крышка цилиндра поршневого компрессора

Сущность изобретения: с полостью нагнетания корпуса с окном подвода сжатого газа сообщен патрубок отвода сжатого газа. Заборный конец маслоотборной трубки расположен в нижней части полости. Второй конец трубки сообщен с проточной частью патрубка и образует с ней эжекторную ступень . Второй конец трубки может быть расположен непосредственно внутри патрубка, или прилегая к его внутренней стенке, или образуя с ней зазор, в том числе и постоянной ширины (при соосном расположении конца и патрубка). 9 з.п.ф-лы. 5 ил.

Gekapselte Kleinkaeltemaschine

Anordnung zur Erleichterung des Anfahrens von Kaeltemaschinen

Motorverdichter, insbesondere fuer Kleinkaeltemaschinen

Tauchkolbenkompressor fuer Haushaltkuehlschraenke

Motorkompressor fuer Kaeltemaschinen

Kompressor, insbesondere fuer Kuehlmaschinen

KUEHLSYSTEM

Kältemittelverdichter

Kältemittelverdichter, insbesondere semi-hermetischer Kältemittelverdichter mit einem Gehäuse, einem Motor, dessen Rotor mit einer Kurbelwelle verbunden ist, und einem Kompressorblock, der mehrere sternförmig angeordnete Zylinder aufweist, von denen jeder durch einen Zylinderkopf abgeschlossen ist und in denen jeweils ein von der Kurbelwelle angetriebener Kolben angeordnet ist, wobei zwischen dem Motor und dem Kompressorblock eine Sauggasführungseinrichtung angeordnet ist, dadurch gekennzeichnet, dass die Sauggasführungseinrichtung (51) eine mittige Erhöhung (53) aufweist und die Erhöhung (53) ein Lager der Kurbelwelle (11) unter Ausbildung eines Zwischenraums (58) umgibt und der Zwischenraum (58) durch jeweils einen Kanal (55) mit einem Zylinderkopf (49) verbunden ist, der zwischen der Sauggasführungseinrichtung (51) und dem Kompressorblock (5) ausgebildet ist.

GEKAPSELTER MOTORKOMPRESSOR FUER INSBESONDERE KAELTEERZEUGER

Motorkompressor

Kleinkaeltekompressor

KLEMMLEISTE FUER EINEN GEKAPSELTEN KAELTEKOMPRESSOR

Improvements in or relating to film-flow packins

... 1,080,991. Laminates. IMPERIAL CHEMICAL INDUSTRIES Ltd. Feb. 21, 1964 [March 4, 1963], No. 8612/63. Addition to 962,432. Heading B5N. [Also in Divisions B1 and F4] A film-flow packing comprises a stack of alternate flat and corrugated sheets of rigid thermoplastic organic polymeric material, the corrugations of the sheets 1 and 4 on opposite sides of a flat sheet 2 following different paths and being connected to the flat sheet and/or to each other at those points 5 at which sheets 1 and 4 would be in contact if sheet 2 were omitted. The corrugation may be non-linear (Figs. 2 and 3, not shown). The sheets may be additionally secured together along lines of contact by an adhesive.

Refrigeration apparatus

Inside the hermetic shell of a scroll compressor, a normally closed solenoid valve seats against the back side of a stationary scroll plate to close a discharge opening through the plate. A coil circuit that actuates the valve has an electrical resistance that increases with temperature. The temperature dependent resistance allows the coil circuit to also function as a discharge temperature sensor. Should the discharge gas over-heat, the compressor motor and the valve are de-energized in response to the resistance exceeding a predetermined limit. The closed valve prevents backflow from rapidly reversing the rotational direction of the compressor, which can be extremely noisy and damaging to the compressor. Both the valve and the compressor motor are energized at the same time, regardless of the compressor's direction of rotation. Should the compressor motor be inadvertently wired to operate in reverse, the solenoid valve still opens to prevent destructively low pressure from developing ...

Hermetic refrigeration compressor with improved control and connection means

Hermetic refrigeration compressor, in particular for household refrigeration appliances, comprising control and connection means, such as a motor overload cutout (13) provided with a protective support (14), an electric motor starter (16), a terminal block (17) with related strain-relief (18), and a closing cover (27), in which some of these component parts are integrated into a single one-piece construction (15). The cover (27) is mounted slidably in a direction which is tangential to the casing (10) of the compressor. This solution is advantageous in that it cuts the number of pans to be assembled and reduces the amount of space required to accommodate the compressor.

COMPRESSOR MOTOR HOUSING AS AN ECONOMIZER AND MOTOR COOLER IN A REFRIGERATION SYSTEM

Refrigerating machine

... 244,768. British Thomson-Houston Co., Ltd., (Assignees of Orr, C.). Dec. 16, 1924, [Convention date]. Refrigerating, compression machines for.-A machine employing sulphur dioxide or like refrigerant and adapted to be mounted on the top cover 4, Fig. 1, of a cooling-chamber, with the evaporator 41 depending into the chamber, comprises oscillating-cylinder compressors 14 driven by an eccentric 27 from the vertical shaft 28 of an electric motor 31, an air-cooled condenser consisting of a gilled copper coil 10, a reservoir 7 for condensed refrigerant, a delivery chamber 8 containing lubricant, and automatic valve devices for controlling the flow of refrigerant to the evaporator and for equalizing the pressures throughout the upper part of the machine when the compressor is stopped. The reservoir 7 is mounted on a base 5 and supports the compressor chamber, which in turn supports the motor. The compressor cylinders have trunnions 15, 16, are flattened where they engage the top 17 of the chamber ...

Combined motor and compressor units for use in heat pumps

... 936,315. Cooling dynamo-electric machines. JOSEPH LUCAS (INDUSTRIES) Ltd. March 1, 1962 [March 2, 1961], No. 7599/61. Class 35. A combined motor compressor unit for a heat pump enclosed by a common housing 1 has the end of the motor 2 remote from the compressor 3 enclosed within an imperforate cover 4 which with the motor defines a chamber 5. The inlet 7 to the housing is so disposed that the refrigerant will be caused to flow around the motor and then through the motor to reach the compressor inlet 6 in chamber 5.

Improvements in and relating to compression refrigerating machines

... 339,519. British Thomson-Houston Co., Ltd., (Assignees of Steenstrup, C.). Dec. 29, 1928, [Convention date]. Oscillating - cylinder pumps; regulating compression.-An oscillating cylinder compressor 3 is stationed within a casing 6 for compressed refrigerant, and is adapted to receive refrigerant from the evaporator of the system normally and to deliver into the casing, from which the compressed refrigerant passes to a condensing coil 9 in the water-cooled jacket of the casing, and so to the evaporator. At low speeds the inlet port 14 of the compressor is opened to the interior of the casing and the refrigerant is circulated idly, the supply from the evaporator being cut off. The normal supply takes place through a coil 45 leading to a swinging pipe 42 ending in a passage in a member 16, on the face of which the cylinder oscillates, thus opening the inlet port 14 to the pipe 42 during a part of the stroke, and closing it during the remainder. The member 16 is pivoted at one end and attached ...

Sealed Motor-Compressor.

... 1,179,169. Bearings; lubricating. DANFOSS A/S. 22 Dec., 1967 [12 Jan., 1967], No. 58265/67. Heading F2A. [Also in Division F1] Oil which drains off a stator or compressor of a sealed-motor compressor for a refrigerating unit, is conducted over at least part of its return path to the sump by means of a guide element. The latter may be a metal wire or band or may be a plastics thread or band, and may extend from the draining point to the oil sump, to a point immediately adjacent thereto or to the wall of a housing. In an embodiment a motor compressor 3 is mounted in a housing having parts 1 and 2 and comprises a motor section 4 and a compressor section 5, the two sections being connected by means of a motor-carrying member 6. The compressor 3 is supported by a number of members 7 which are fixed on the member 6 and supported, via spiral wound coils springs 8, on a strap 9 inserted in the housing. Lubricant is conveyed to the lubricating points by means of a hollow shaft having an end 12 extending ...

Motor Compressors

... 1,162,946. Compressors; balancing. DANFOSS S.A. March 25, 1968 [March 30, 1967], No.14161/68, Headings F1M and F1N. In a motor compressor comprising a compression piston 5 reciprocated in a cylinder 4 by a vertical crank-shaft 1 having upper and lower journals 18, 15 running in bearings 10, 9 provided in a support member 6, the upper bearing journal 18 has a flange 19 which forms a thrust bearing with a bearing ring 11 on the end of the upper bearing 10. As shown, the upper bearing 10 is large enough to allow the crank portion 14 of the crank-shaft to pass therethrough during assembly of the shaft to the bearings 9, 10. Alternatively the upper bearing journal 18 may be smaller in which case the upper bearing 10 is provided with an arcuate cut-out for passage of the crank portion 14. To improve the balance, a recess 20 is provided in the upper journal 18 whereby the journal functions as a counterweight to the crank portion 14.

Improvements in compressor assemblies particularly for refrigerators

MOTOR COMPRESSOR UNIT

MOTOR COMPRESSORS

VALVES FOR REFRIGERATION SYSTEMS

... 1530481 Controlling compressors PRIMORE SALES Inc 10 Oct 1975 [11 Oct 1974] - 41598/75 Heading F1N [Also in Division F2] An unloader valve for the compression chamber of a refrigerator compressor has a ball 30, preferably of PTFE, biased by a spring 31 against a spherical stop surface 34 and which is closed against a seat 41 by the pressure in the compression chamber e.g. after a few strokes from starting. The unloader valve may be a push fit in an aperture in a valve plate 20 of the compressor or may be mounted in a duct through the side wall of the compression chamber. Since the ball substantially fills the space between the seat and the stop a minimum valve volume is connected to the compression chamber via slot 35 when the valve is closed during operation of the compressor.

Hermetically sealed compressors

... 900,477. Compressors. TRANE CO. March, 13, 1961, No. 9160/61. Class 8(1). An hermetically scaled reciprocating piston compressor connected by a crankshaft 20, Fig. 1, to an electric driving motor 22 is provided with a discharge muffler 36 which is integral with the cast crankcase 26 and has a closure cap 46 which forms a seat for a mounting spring 38 secured to the housing 12. As shown the compressor comprises three angularly spaced cylinders 16 in parallel arid refrigerant gas is admitted through a filter screen 60 and having cooled the motor 22 traverses an intake muffler 54 and chamber 56 associated with each cylinder and is discharged through an annular chamber 66 to the corresponding discharge muffler 36, 37, 39, Fig. 2. Mufflers 36, 37 discharge through ducts 41, 43 to muffler 39 which in turn discharges through a duct 45 to an outlet 47.

COMPRESSOR UNIT

... 1524256 Motor compressors; silencing gaseous flow DANFOSS AS 29 Oct 1975 [30 Oct 1974] 44663/75 Headings F1B and FIN [Also in Divisions B1 and F4] A motor compressor unit for use in a refrigerant circuit comprises a casing 4 containing a motor compressor 5 and a gas discharge or suction sound absorbing chamber 21 filled with a drying agent 26. Screens 24 and 25 located near the inlet and outlet ends respectively of the chamber 21 are provided for retaining the drying agent 26. The drying agent may be molecular sieve material in particulate form or a formed filter as described in Specification 1432383. The heat of compression is transferred from the compression cylinder 14 to the chamber 21 through a heat conducting member 27.

Sealed motor-compressor unit for refrigeration systems

A sealed motor-compressor unit for refrigeration systems in which a direct current motor (16) and the reciprocating compressor (18) are in separate chambers (28, 13) which intercommunicate through an annular filter element (72) of sintered zinc. The drive from the motor is transmitted to the compressor by means of a circular eccentric cam (62) which engages in a semi-circular recess in a shoe (66) which slides on the base of the compressor piston (58). A spring (68) maintains contact between the cam and the shoe. ...

Apparatus for compressing refrigerant gas

... 1,022,387. Rotary compressors. WHIRLPOOL CORPORATION. Aug. 4, 1964 [July 19, 1963], No. 30621/64. Heading F1F. A hermetically sealed rotary refrigerant compressor, Fig. 1 (not shown) comprises an outer housing 12, 13 in which is rested a member 14 forming a sump for lubricating oil 27 and defining a chamber 25 pressurized by gas discharged from the compressor cylinder 19 through a delivery passage 48 to force oil upwardly through a filter 55 and passageways in the compressor driving shaft 22. Gas to be compressed is admitted to an inlet chamber 15 defined between the housing 13 and the member 14 so that oil 30 entrained therein collects in the chamber bottom 31 and the gas passes through openings 37 to a suction chamber 24 to cool the driving motor 17 before passing through an opening 39 (Fig. 4, not shown) in a partition 18 communicating with the compressor chamber 40. The throttling action of the openings 37 causes the pressure in the chamber 15 to be greater than in the chamber 24 whereby ...

ARRANGEMENT OF A STARTER AND SAFETY DIVICE - CONSTRUCTION UNIT FOR AN ELECTRIC MOTOR COMPRESSOR - UNIT

KÄLTEMITTELVERDICHTER MIT AUSGLEICHSVOLUMEN

Hermetisch gekapselter Kältemittelverdichter, welcher ein hermetisch dichtes Verdichtergehäuse (1) aufweist, in dessen Innerem eine ein Kältemittel verdichtende Kolben-Zylinder-Einheit arbeitet, wobei, vorzugsweise an dessen Zylinderkopf (15), ein eine Eintrittsöffnung (18) aufweisender Saugschalldämpfer (16) vorgesehen ist, über den Kältemittel zum Ansaugventil (24) der Kolben-Zylindereinheit (3, 4) strömt und der mindestens ein Füllvolumen (20) sowie ein Ausgleichsvolumen (21) aufweist, in welchem das in den Zylinder anzusaugende Kältemittel oszilliert und welches sowohl mit dem Füllvolumen (20) des Saugschalldämpfers (16) als auch mit dem Inneren des Verdichtergehäuses (1) in Verbindung steht. Es ist vorgesehen, dass die Eintrittsöffnung (18) gleichzeitig die Verbindungsöffnung (26) zwischen Ausgleichsvolumen (21) und Füllvolumen (20) ist und das Ausgleichsvolumen (21) durch ein Ummantelungsrohr (22) gebildet ist, welches einerseits die Eintrittsöffnung (18) umgibt und in das Verdichtergehäuse ...

HERMETIC ENGINE COMPRESSOR UNIT FOR KUEHLKREISLAEUFE.

KAELTEMASCHINE MIT GEKAPSELTEM MOTORVERDICHTER

Device for the relief of starting compression refridgerators.

Engine compressor aggregate of refridgerators

Compressor for refridgerators

Single and double-ended compressors

REFRIGERATION SYSTEM

Single and double-ended compressors

INTEGRATED MULTI-UNIT REFRIGERATION MOTOR-COMPRESSOR ASSEMBLY

COMPRESSOR UNIT, PARTICULARLY FOR REFRIGERATORS

LINEAR MOTOR

The present invention provides an improved design of linear motor as well as an improved control strategy. The design allows for a shorted stator, where the armature magnets are controlled to reciprocate to a greater maximum displacement than for an equivalent conventional linear motor. The control strategy is such that a minimum of external sensors are required. The linear motor is driven at its resonant frequency ensuring optionally efficient operation. A determination of the maximum current is made based on a relationship with the resonant frequency and the evaporating temperature/pressure of the vapour entering the compressor. The current is then limited to control the maximum displacement to avoid damage.

REFRIGERATION COMPRESSOR APPARATUS AND METHOD OF ASSEMBLY

REFRIGERATION COMPRESSOR APPARATUS AND METHOD OF ASSEMBLY There is disclosed herein an improved means and method for securing a shroud to one end of a motor in a refrigeration compressor. A fastening device is secured to one end of the motor stator by fasteners securing the stator to the compressor housing and is provided with a peripheral flange portion adapted to be folded into engagement with portions of the shroud so as to retain the shroud in position. The stator may therefore be easily accurately positioned with respect to the rotor to assure a uniform circumferential air gap therebetween prior to assembly of the shroud thereto. Additionally, a suction gas directing member may be provided on a portion of the shroud to efficiently direct the suction gas into the motor compartment. In one embodiment, the suction gas is directed through the motor air gap to the compressor via passage means in the compressor housing so as to cool the motor. In another embodiment, the suction gas is directed ...

INTEGRATED MULTI-UNIT REFRIGERATION MOTOR-COMPRESSOR ASSEMBLY

INTEGRATED MULTI-UNIT REFRIGERATION MOTOR-COMPRESSOR ASSEMBLY Two motor-compressor units of the vertical shaft type are housed in spaced parallel relation in a common sealing housing. A hollow chambered partition extends transversely within the housing between the units and is attached to the side walls and top wall but spaced from the bottom wall. The partition functions as a suction gas header, substantially isolates the suction areas above the oil level, and stiffens the housing walls, inhibiting resonant vibration.

REFRIGERATOR WITH A HERMETICALLY SEALED REFRIGERANT CIRCUIT

REFRIGERATION SYSTEM

COMPRESSOR FOR REFRIGERATING PLANT

CONTROL APPARATUS FOR TWO SPEED REFRIGERANT COMPRESSOR

LIQUID SENSOR FOR RECIPROCATING REFRIGERANT COMPRESSOR

VARIABLE CAPACITY COMPRESSOR

HERMETIC MOTOR COMPRESSOR UNIT

REFRIGERATION COMPRESSOR APPARATUS AND METHOD OF ASSEMBLY

COOLING SYSTEM FOR HERMETIC COMPRESSOR

METHOD FOR OPERATING A HEAT PUMP AND HEAT PUMP

The invention relates to a method for operating a heat pump (1) comprising the following steps: a fluid is condensed by means of at least one condensation device (5); the fluid is expanded by means of at least one expansion device (6); the fluid is evaporated by means of at least one evaporation device (2); and the fluid is compressed by means of at least one compression device (3). An ionic liquid is used when compressing the fluid. The invention also relates to a heat pump (1).

COAXIAL ECONOMIZER ASSEMBLY AND METHOD

A coaxial economizer (40) for use in a chiller system (20) comprising an inner housing (184) and an outer housing (186) having a common longitudinal axis. The outer housing has an inlet for receiving a fluid from a upstream compressor stage of a multistage compressor and an outlet for conveying a fluid to a downstream compressor stage of a multistage compressor. A flow chamber (160) forms a fluid flow path about the inner housing. A flash chamber (158) is coterminous with the flow chamber and flashes fluid in a liquid state to a gas state. A flow passage (156) between said flash chamber and the flow chamber for conveying a flashed gas from the flash chamber to the flow chamber; wherein the flashed gas conveyed from the flash chamber and the fluid received from the inlet of the outer housing mix along the fluid flow path toward the outlet of the outer housing.

HERMETIC COMPRESSOR WITH INSULATED DISCHARGE TUBE

Kältemaschine, bei welcher ein Antriebs-Elektromotor in einem Kältemittel enthaltenden Gehäuse untergebracht ist.

Fördereinrichtung für gasförmige oder flüssige Medien.

Kompressor für Kompressionskältemaschinen, mit einem zur Erleichterung des Anlassens desselben dienenden Ventil.

Kompressionskältemaschine.

Kältemaschine mit Umlaufverdichter.

Zum Spinnen besonders feiner oder hohler Fäden geeignete Viskose und Verfahren zu deren Herstellung.

Einrichtung zur Anlasserleichterung von elektromotorisch angetriebenen Kompressoren.

Gekapseltes Kompressormotoraggregat.

Gekapseltes Kompressormotoraggregat an Kompressionskältemaschinen.

Zusammen mit dem Läufer ihres Antriebselektromotors gasdicht ummantelte Arbeitsmaschine, insbesondere zur Kälteerzeugung.

Kleinkältemaschine mit gekapseltem, elektromotorisch angetriebenem Kolbenkompressor.

Stopfbüchsloser Kompressor, insbesondere für Kältemaschinen.

Kleinkältemaschine.

Einrichtung zur Anlasserleichterung von elektromotorisch angetriebenen Kompressoren.

Aus einem Motor und einem Wälzkolbenkompressor bestehendes, in einer Kapsel eingeschlossenes Maschinenaggregat, insbesondere für Kälteanlagen.

Mit mindestens zwei Vergrösserungslinsen ausgerüstetes Korpuskularstrahlmikroskop.

Motorkompressoraggregat, insbesondere für hermetisch gekapselte Kleinkältemaschinen

Dispositif compresseur

Gekapseltes Kompressoraggregat für Kleinkältemaschinen

Einrichtung zur federnden Lagerung des Kompressoraggregates von hermetisch gekapselten Kältekompressoren

Tragkörper für das Motorkompressoraggregat von hermetisch gekapselten Kompressionskältemaschinen

Motorkompressoraggregat, insbesondere für hermetisch gekapselte Kleinkältemaschinen

Groupe moto-compresseur, notamment pour installations frigorifiques.

Impianto frigorifero a comando elettrico con gruppo motocompressore ermeticamente chiuso.

Drehkolbenverdichter

Moteur à turbine à gaz

Hermetisch gekapselter Kältekompressor

HEAT PUMP DEVICE, HEAT PUMP SYSTEM, AND METHOD FOR CONTROLLING INVERTER

An object of the present invention is to maintain a heating amount constant when a compressor is heated at the time of shutdown of the compressor, regardless of the influences of production tolerance and environment variations. An inverter control unit causes an inverter to generate a high-frequency AC voltage having a de-energized section in which a voltage applied from the inverter to a motor is zero between a section in which the voltage is positive and a section in which the voltage is negative. At this time, the inverter control unit detects a value of a current flowing to the inverter in a detection section residing from immediately before a start of the de-energized section to immediately after an end of the de-energized section, and causes the inverter to generate a high-frequency AC voltage adjusted according to the detected current value. 1. A heat pump device comprising:a compressor having a compression mechanism for compressing a refrigerant;a motor that actuates the compression mechanism provided in the compressor;an inverter that applies a predetermined voltage to the motor; andan inverter control unit that causes the inverter to generate a high-frequency AC voltage having a de-energized section in which the voltage applied from the inverter to the motor is zero between a section in which the voltage is positive and a section in which the voltage is negative, a current-value detection unit that detects a value of a current flowing to the inverter; and', 'a high-frequency-voltage generation unit that causes the inverter to generate a high-frequency AC voltage according to a current value detected by the current-value detection unit., 'wherein the inverter control unit includes2. The heat pump device according to claim 1 , wherein the current-value detection unit detects a current flowing from the inverter to the motor in the detection section.3. The heat pump device according to claim 1 , wherein the current-value detection unit detects a DC current ...

Rotary compressor

A rotary compressor includes a sealed vertical compressor housing, a compressing unit, and a motor. A refrigerant discharging unit is provided at an upper part and a refrigerant intake unit is provided at a lower part side surface in the sealed vertical compressor housing. The compressing unit is disposed on the lower part of the compressor housing, includes an annular cylinder, an end plate including a bearing unit and a discharge valve unit and blocking end portions of the cylinder, an annular piston that engages with an eccentric portion of a rotation axis supported by the bearing unit, revolves along a cylinder inner wall of the cylinder in the cylinder, and forms a cylinder chamber between the cylinder inner wall and the annular piston, and a vane. The motor is disposed on the upper part of the compressor housing, and drives the compressing unit via the rotation axis.

ELECTRIC MOTOR SYSTEM

An electric motor system includes a drive shaft, a first electric motor, a second electric motor, a first inverter, a second inverter and a control unit. The drive shaft is rotatable around an axis. The first electric motor and the second electric motor rotate the drive shaft. The first inverter supplies power in order to generate a torque to the first electric motor. The second inverter supplies power in order to generate a torque to the second electric motor. The control unit controls the first inverter and the second inverter. The controller is configured to be able to change a ratio between an output torque of the first electric motor and an output torque of the second electric motor. 1. An electric motor system comprising:a drive shaft rotatable around an axis;a first electric motor and a second electric motor each configured to rotate the drive shaft;a first inverter configured to supply power in order to generate a torque to the first electric motor;a second inverter configured to supply power in order to generate a torque to the second electric motor; and an output torque of the first electric motor and', 'an output torque of the second electric motor., 'a control unit configured to control the first inverter and the second inverter, the controller being configured to be able to change a ratio between'}2. The electric motor system according to claim 1 , whereinthe control unit is configured to perform a partial suspension operation in order to suspend a power conversion operation of the first inverter or the second inverter.3. The electric motor system according to claim 1 , whereina carrier frequency of the first inverter and a carrier frequency of the second inverter are different from each other.4. The electric motor system according to claim 1 , whereinone of the first and second electric motors is more efficient than an other of the first and second electric motors in a relatively low rotational speed range, and the other of the first and second ...

MOTOR AND COMPRESSOR INCLUDING THE SAME

Disclosed is a compressor including a housing, and a motor including a stator to be interference fitted into and fixed to an inner circumferential surface of the housing and a rotor rotatable inside the stator. The stator includes an annular back yoke disposed inside the housing, a plurality of teeth extending radially inward from the back yoke, and a coil wound on the plurality of teeth. The back yoke includes a deformation portion compressed and deformed by the housing while the stator is interference fitted into the inner circumferential surface of the housing, a contact portion which protrudes radially outward from the deformation portion and being in contact with the housing, and a cavity formed on a radial inner side of the deformation portion into which which the deformation portion is deformed. 1. A compressor comprising:a housing; and a stator configured to be interference fitted into and fixed to an inner circumferential surface of the housing, the stator including an annular back yoke, a plurality of teeth extending radially inward from the annular back yoke, and a coil wound on the plurality of teeth, and', 'a rotor configured to be rotatable inside the stator,, 'a motor including a deformation portion compressed and deformed by the housing while the stator is interference fitted into the inner circumferential surface of the housing;', 'a contact portion which protrudes radially outward from the deformation portion and being in contact with the housing; and', 'a cavity formed on a radial inner side of the deformation portion into which the deformation portion is deformed., 'wherein the annular back yoke comprises2. The compressor according to claim 1 , whereinthe deformation portion comprises a cantilever, andthe contact portion is formed on an end of the cantilever.3. The compressor according to claim 2 , whereinthe annular back yoke comprises one of the deformation portion, one of the contact portion, and one of the cavity, for each of the plurality of ...

SYSTEM AND METHOD FOR OCR CONTROL IN PARALLELED COMPRESSORS

A heating, ventilation, air conditioning, and refrigeration (HVACR) system includes a first compressor having a first capacity, a second compressor having a second capacity, a condenser, an expansion device, and an evaporator fluidly connected. The first compressor and the second compressor are arranged in parallel. The first compressor includes a first lubricant sump. The second compressor includes a second lubricant sump. The first lubricant sump is fluidly connected to the second lubricant sump via a lubricant transfer conduit. A flow restrictor is disposed in the lubricant transfer conduit. The flow restrictor is configured to reduce a refrigerant flow between the first compressor and the second compressor. 115-. (canceled)16. A flow restrictor used in a heating , ventilation , air conditioning , and refrigeration (HVACR) system that has a first compressor having a first capacity , a second compressor having a second capacity , a condenser , an expander , and an evaporator fluidly connected; the first compressor and the second compressor being arranged in parallel; the first compressor including a first lubricant sump , and the second compressor including a second lubricant sump; the first lubricant sump being fluidly connected to the second lubricant sump via a lubricant transfer conduit; the flow restrictor being disposed in the lubricant transfer conduit and around a middle of the lubricant transfer conduit; the flow restrictor being configured to reduce a refrigerant flow between the first compressor and the second compressor; the flow restrictor comprising:openings including a first opening and a second opening; andblocking areas;wherein the flow restrictor includes a top portion having the first opening, a middle portion, and a bottom portion having the second opening; andwherein an area ratio of the openings to areas including the blocking areas and the openings is configured to generate resistance to control the refrigerant flow, so that an upward ...

CENTRIFUGAL COMPRESSOR FOR USE WITH LOW GLOBAL WARMING POTENTIAL (GWP) REFRIGERANT

A centrifugal compressor is configured to be used for compressing a low global warming potential (GWP) refrigerant. The centrifugal compressor comprises a casing, an impeller, and a motor for rotating the impeller. The impeller is equipped with blades having a fully nonlinear shape in a quasi-orthogonal cross-sectional view. A hub-side blade angle delta of each of the blades from a hub portion of the first impeller to a mid-span position of the blade varies along a streamwise direction such that the hub-side blade angle delta is largest at a position closer to a leading edge of the first blade than to a trailing edge of the first blade. The casing is configured such that the low global warming potential (GWP) refrigerant enters the impeller from the inlet portion along an axial direction of the impeller and exits the impeller to the outlet portion in a radial direction of the impeller. 1. A centrifugal compressor for use with a low global warming potential (GWP) refrigerant , the centrifugal compressor comprising:a casing having a first inlet portion and a first outlet portion;a first impeller disposed between the first inlet portion and the first outlet portion, the first impeller being attached to a first end of a shaft that is rotatable about a rotation axis, the first impeller being equipped with first blades having a fully nonlinear shape in a quasi-orthogonal cross-sectional view, a hub-side blade angle delta of each of the first blades from a hub portion of the first impeller to a mid-span position of the first blade varying along a streamwise direction such that the hub-side blade angle delta is largest at a position closer to a leading edge of the first blade than to a trailing edge of the first blade;a motor arranged inside the casing to rotate the shaft in order to rotate the first impeller,the casing being configured such that the low global warming potential (GWP) refrigerant enters the impeller from the first inlet portion along an axial direction of ...

MOTOR, COMPRESSOR, AND REFRIGERATION DEVICE

A motor and a compressor having the motor are provided. The motor has a stator and a rotor. The stator has a circular tubular stator core having an inner diameter and an outer diameter. The ratio k of the inner diameter to the outer diameter satisfies k>0.5. The rotor is provided in the cylindrical space formed by the stator core and has a rotor core and a magnetic member provided on the rotor core. The exhaust volume V of the compressor, the mass M of the rotor core and the magnetic member, and the maximum radius of an outer edge of the rotor satisfy 20.5; anda rotor provided in a cylindrical space formed by the stator core and comprising a rotor core and a magnetic member provided on the rotor core,{'sup': 2', '3, 'wherein the exhaust volume V of the compressor, the mass M of the rotor core and the magnetic member, and the maximum radius R of an outer edge of the rotor satisfy 20.57; and{'sup': '2', 'the exhaust volume V of the compressor, the mass M of the rotor core and the magnetic member, and the maximum radius R of the outer edge of the rotor satisfy 2.2 Подробнее

LINEAR COMPRESSOR AND REFRIGERATOR INCLUDING A LINEAR COMPRESSOR

A linear compressor and a refrigerator including a linear compressor are provided. The linear compressor may include a shell coupled to a suction inlet, through which a refrigerant may be introduced, and a discharge outlet, through which the refrigerant may be discharged, a cylinder disposed within the shell to accommodate a piston reciprocated to compress the refrigerant introduced through the suction inlet, a frame that accommodates the cylinder, the frame being mounted inside the shell, and a discharge cover coupled to a front surface of the frame to discharge the refrigerant compressed by the piston to the discharge outlet. A front surface of the cylinder that faces the discharge cover may be spaced a predetermined distance from the discharged cover.

ROTARY COMPRESSOR AND REFRIGERATION CYCLE APPARATUS

According to one embodiment, a rotary compressor includes a compression mechanism unit and an electric motor. The compression mechanism unit includes a first bearing, a second bearing, first to third refrigerant compression units, a second intermediate partitioning panel, and a rotation shaft. The compression mechanism unit is fixed to the sealed container by a pair of fixing units which are provided at two locations spaced apart from each other in the axial direction of the rotation shaft, and the center of gravity of a structure comprising the compression mechanism unit and the rotor of the electric motor is positioned between the pair of fixing units. 1. A rotary compressor comprising:a cylindrical sealed container;a compression mechanism unit compressing a refrigerant inside the sealed container; andan electric motor including a stator fixed to an inner peripheral surface of the sealed container on an upper side of the compression mechanism unit and a rotor surrounded by the stator to drive the compression mechanism unit inside the sealed container, a first bearing and a second baring arranged in intervals in an axial direction of the sealed container;', 'first to third refrigerant compression units arranged in intervals in an axial direction of the sealed container between the first bearing and the second bearing;', 'a first intermediate partition plate interposed between the first refrigerant compression unit and the second refrigerant compression unit;', 'a second intermediate partition plate interposed between the second refrigerant compression unit and the third refrigerant compression unit; and', 'a rotary shaft including a first journal portion supported by the first bearing, a second journal portion supported by the second bearing, the first journal portion, first to third crank portions provided between the first journal portion and the second journal portion to eccentrically rotate in cylinder chambers of the first to third refrigerant compression ...

CHILLER MOTOR WITH COOLING FLOW PATH

A cooling system for a motor to power a compressor in a vapor compression system is provided. The cooling system includes a housing with a cavity enclosing the motor and defining a central axis and fluid directing features extending into the cavity and oriented parallel to the central axis. The cooling system further includes a fluid circuit configured to circulate a cooling fluid between the housing and the motor. The fluid circuit includes a first cooling fluid path defined by directing features that cause a first portion of cooling fluid to travel around a first portion of the motor and a second cooling fluid path defined by fluid directing features that cause a second portion of cooling fluid to travel around a second portion of the motor. The second portion of the motor is located opposite the first portion. 1. A cooling system for a motor to power a compressor in a vapor compression system , the cooling system comprising: a cavity enclosing the motor and defining a central axis; and', 'a plurality of fluid directing features extending into the cavity and oriented parallel to the central axis; and, 'a housing comprising a first cooling fluid path defined at least partially by the plurality of fluid directing features that cause a first portion of cooling fluid to travel around a first portion of the motor, and', 'a second cooling fluid path defined at least partially by the plurality of fluid directing features that cause a second portion of cooling fluid to travel around a second portion of the motor, wherein the second portion of the motor is located opposite the first portion., 'a fluid circuit configured to circulate a cooling fluid between the housing and the motor, the fluid circuit comprising2. The cooling system of claim 1 , wherein the first cooling fluid path and the second cooling fluid path are serpentine-shaped.3. The cooling system of claim 1 , wherein the fluid circuit further comprises a first connection in the housing to receive cooling fluid ...

ROTOR FOR ELECTRIC MOTOR, ELECTRIC MOTOR AND COMPRESSOR

Disclosed are a rotor for an electric motor, an electric motor, and a compressor. The rotor includes: a rotor core (), provided with a shaft hole () and four magnet grooves (); and four permanent magnets (), disposed in corresponding magnet grooves, each permanent magnet including a first surface () and a second surface (). When viewed from a projection surface, the first surface has an arc segment (), and the second surface has a plurality of straight segments connected in sequence. A thickness H of each permanent magnet on a corresponding magnetic pole centerline, a length L of the second surface projected on the projection surface, and a radius R of the rotor core satisfying the following relationships: 0.24≤H/R≤0.26 and 1.07≤L/R≤1.11. 1. A rotor for an electric motor , comprising: a shaft hole, wherein the shaft hole is circular and has a center; and', 'four magnet grooves equally-spaced around a circumference of the shaft hole, both ends of each magnet groove being provided with a magnetic isolation slot in communication with the magnet groove, a magnetic isolation bridge being defined between two adjacent magnetic isolation slots; and, 'a rotor core having a circular cross section, wherein the circular cross section defines a central axis of the rotor, the rotor core comprisingfour permanent magnets each provided in a corresponding magnet groove, a shape of each magnet matching a shape of the corresponding permanent magnet groove, each permanent magnet comprising a first surface and a second surface arranged opposite each other in a radial direction of the rotor core, the second surface being radially approximate to the shaft hole,wherein, when viewed from a projection surface that is perpendicular to the central axis of the rotor, the first surface comprises an arc segment, when viewed from the projection surface, the second surface comprises a plurality of straight segments connected sequentially, with an angle between two adjacent straight segments,wherein ...

LOW LOAD CAPACITY PROTECTION

A generator set for a transport refrigeration unit that is operable at a first frequency and a second frequency. The generator set includes a controller, a generator and a prime mover coupled to the generator. The prime mover selectively drives the generator in least at a first non-zero speed and a second non-zero speed. The controller can detect a capacity of the transport refrigeration unit and change the speed of the generator set to maintain a desired temperature within a transport unit. 1. A method for controlling a speed of a generator set that includes a prime mover and a generator , the method comprising:a controller determining whether a transport refrigeration unit has sufficient capacity to maintain a desired temperature within a transport unit;changing a speed of the prime mover from a first speed to a second speed, that is greater than the first speed, so as to provide sufficient capacity to the transport refrigeration unit when the transport refrigeration unit does not have sufficient capacity to maintain a desired temperature within the transport unit, the controller determining whether the speed of the of the prime mover is within a first threshold range;', 'the controller determining whether a load of the generator is above a second threshold; and, 'wherein the controller determining whether the transport refrigeration unit has sufficient capacity to maintain the desired temperature within the transport unit includesthe controller detecting an increasing generator load slope condition.2. (canceled)3. The method of claim 1 , wherein changing the speed of the prime mover from the first speed to the second speed includes switching the prime mover from the first speed to the second speed when the first speed of the prime mover is within the first threshold range claim 1 , the load of the generator is above the second threshold and the increasing generator load slope condition is detected.4. The method of claim 1 , wherein the load of the generator ...

DRIVE CIRCUIT FOR A VARIABLE SPEED FAN MOTOR

A fan drive circuit for a variable speed fan motor in a cooling system, includes an inverter configured to supply a current signal to stator windings of the variable speed fan motor, a frequency detection circuit coupled to an output stage of an inverter of a compressor motor of the cooling system and configured to detect a first frequency of a compressor current signal at the output stage of a variable speed compressor drive circuit and generate a frequency signal, and a digital signal processor (DSP) coupled to the inverter and the frequency detection circuit. The DSP is configured to receive the frequency signal corresponding to the first frequency from the frequency detection circuit, select a second frequency corresponding to the first frequency at which to operate the variable speed fan motor, and transmit control signals to the inverter to supply current to the stator windings at the second frequency. 1. A fan drive circuit for a variable speed fan motor in a cooling system , said fan drive circuit comprising:a fan inverter configured to supply a current signal to stator windings of the variable speed fan motor;a sensor coupled to a power input stage of a compressor motor and configured to generate a sensor signal, wherein the sensor signal represents an amplitude of one of a current or a power at the power input stage; and receive the sensor signal corresponding to the amplitude from said sensor;', 'select a frequency corresponding to the amplitude at which to operate the variable speed fan motor; and', 'transmit control signals to said fan inverter to supply current to the stator windings at the selected frequency., 'a digital signal processor (DSP) coupled to said fan inverter and said sensor, said DSP configured to2. The fan drive circuit of claim 1 , wherein the compressor motor is configured to rotate a compressor of the cooling system.3. The fan drive circuit of claim 1 , wherein said sensor comprises a current transformer.4. The fan drive circuit of ...

SCROLL COMPRESSOR SHAFT

A crankshaft assembly for a scroll compressor is disclosed. The crankshaft assembly includes a crankpin having a plurality of apertures therethrough. A crankshaft body has an aperture therethrough. The aperture of the crankshaft and one of the plurality of apertures of the crankpin being aligned when in an assembled state such that in operation fluid flows between the aperture of the crankshaft body and the one of the plurality of apertures of the crankpin. The crankshaft body includes a second aperture aligned with a second of the plurality of apertures of the crankpin. The crankpin and the crankshaft body are separate members. A fastener extends through the second of the plurality of apertures of the crankpin and into the second aperture of the crankshaft body to secure the crankpin and the crankshaft body together in the assembled state. 1. A crankshaft assembly for a scroll compressor , comprising:a crankpin having a plurality of apertures therethrough;a crankshaft body having an aperture therethrough, the aperture of the crankshaft and one of the plurality of apertures of the crankpin being aligned when in an assembled state such that in operation fluid flows from the aperture of the crankshaft body and the one of the plurality of apertures of the crankpin, the crankshaft body including a second aperture, the second aperture of the crankshaft body being aligned with a second of the plurality of apertures of the crankpin, wherein the crankpin and the crankshaft body are separate members; anda fastener, extending through the second of the plurality of apertures of the crankpin and into the second aperture of the crankshaft body to secure the crankpin and the crankshaft body together in the assembled state.2. The crankshaft assembly according to claim 1 , further comprising a plurality of aligning members and a plurality of alignment apertures in the crankpin and the crankshaft body to align the crankpin and the crankshaft body when assembling the crankshaft ...

Electromechanical actuators for refrigerant flow control

An actuator assembly includes a first actuator, a second actuator, and a moving piece that is disposed between the first actuator and the second actuator. The moving piece is positionable to close a gap in the compressor.

HEAT CYCLE FOR TRANSFER OF HEAT BETWEEN MEDIA AND FOR GENERATION OF ELECTRICITY

A heat pump circuit including a compressor that compresses a working fluid from a gas in a low pressure, low temperature first state to a high pressure, a high temperature second state. A first subflow of the working fluid is condensed into a gaseous/liquid mixture and assumes a third state by the working fluid delivering heat to a first medium. The first subflow of the working fluid is expanded and returns to a gas in the first state by absorbing heat from a second medium, whereupon the working fluid completes the cycle again. A second subflow of the compressed working fluid is expanded from the second state and the energy contents in the second subflow converted into electrical energy, whereafter the expanded working fluid is returned to the compressor after passage of the evaporator, or after expansion in the energy converter from the second to the first state. 1. A method in a refrigerant cycle comprising a working fluid , the method comprising:{'sub': 1', '1', 'h', 'h, 'compressing the working fluid in a cycle from a first state with a low pressure pand a low temperature tinto a second state with a high pressure pand a high temperature t,'}{'sub': m', 'm', '1', 'm', 'h', '1', 'm', 'h, 'cooling the working fluid such that the working fluid assumes a third state with a pressure pand a temperature t, whereby p Подробнее

Increased Efficiency of Crank Case Heating Using Pulsed Stator Heat

A compressor heating system may include a compressor drive controller electrically coupled to an outdoor controller configured to selectively implement a pulse width modulation algorithm to deliver a pulsed DC current from the compressor drive controller to at least one stator winding of a motor of a variable speed compressor to provide more efficient auxiliary heating to the compressor to prevent refrigerant migration to the compressor when the compressor remains idle with respect to operating in a cooling or heating mode. The compressor heating system may consume less off-cycle power than traditional compressor auxiliary heating systems, thus complying with regulatory requirements where off-cycle power must average below specific thresholds. 1. A compressor heating system , comprising:a compressor;a compressor drive controller electrically coupled to the compressor and configured to selectively provide a pulsed DC current to a stator winding of a motor of the compressor; andan outdoor unit controller electrically coupled to the compressor drive controller.2. The compressor heating system of claim 1 , wherein the outdoor unit controller is configured to run a pulse width modulation algorithm.3. The compressor heating system of claim 1 , wherein the outdoor unit controller is configured to selectively control the compressor drive controller to cause the compressor drive controller to deliver the pulsed DC current.4. The compressor heating system of claim 1 , wherein the outdoor unit controller is configured to selectively control the compressor drive controller to cause the compressor drive controller to deliver the pulsed DC current using pulse width modulation.5. The compressor heating system of claim 1 , wherein the outdoor unit controller is configured to maintain the temperature of the compressor at least about 20 degrees Fahrenheit above the ambient outdoor temperature.6. The compressor heating system of claim 1 , wherein the compressor heating system is ...

ROTOR, INTERIOR PERMANENT MAGNET MOTOR, AND COMPRESSOR

A rotor includes a cylindrical a rotor core having a plurality of magnet insertion holes extending along a central axis of the cylindrical shape and permanent magnets inserted into the magnet insertion holes, respectively. A slit extending along the central axis is provided between an outer circumferential surface of the rotor core and at least one of the magnet insertion holes. The slit inner lines extend toward the outer circumferential surface of the rotor core from the apex of the slit, the apex being located on a side of the magnet insertion holes. The slit outer line connects side ends of the slit inner lines located on a side opposite to the apex. 1. A rotor comprising:a cylindrical rotor core having a plurality of magnet insertion holes extending along a central axis of the rotor core; andpermanent magnets inserted into the magnet insertion holes, respectively, whereina slit extending along the central axis is provided between an outer circumferential surface of the rotor core and at least one of the magnet insertion holes,the slit has a triangular shape whose width decreases toward the magnet insertion holes in a plan view where the central axis is vertical, andthe triangular shape of the slit comprises a pair of slit inner lines and a slit outer line in a plan view where the central axis is vertical, the slit inner lines extending toward the outer circumferential surface of the rotor core from an apex of the triangular shape, the apex being located on a side where the magnet insertion holes are located, the slit outer line connecting side ends of the slit inner lines, the side ends being located on a side opposite to the apex.2. A rotor comprising:a cylindrical rotor core having a plurality of magnet insertion holes extending along a central axis of the rotor core; andpermanent magnets inserted into the magnet insertion holes, respectively, whereina slit extending along the central axis is provided between an outer circumferential surface of the rotor core ...

POWER CONVERSION DEVICE, MOTOR DRIVE DEVICE INCLUDING POWER CONVERSION DEVICE, AIR BLOWER AND COMPRESSOR INCLUDING MOTOR DRIVE DEVICE, AND AIR CONDITIONER, REFRIGERATOR, AND FREEZER INCLUDING AIR BLOWER AND COMPRESSOR

The power conversion device includes a power-supply shunt resistance provided between an inverter and the negative-voltage side of a DC power supply, respective-phase lower-arm shunt resistances provided between the power-supply shunt resistance and respective-phase lower-arm switching elements, a first overcurrent detection unit performing overcurrent detection on a current that flows through the power-supply shunt resistance on the basis of a power-supply shunt-resistance voltage, and a second overcurrent detection unit performing overcurrent detection on each current that flows through the respective-phase lower-arm shunt resistances on the basis of respective-phase lower-arm voltages, wherein overcurrent detection is performed on each phase current using either one of the overcurrent detection result of the first overcurrent detection unit and the overcurrent detection result of the second overcurrent detection unit. 116-. (canceled)17. A power conversion device that converts DC power supplied from a DC power supply to AC power and that supplies the AC power to a load , the power conversion device comprising:an inverter that is configured by connecting arms in parallel, each of the arms including an upper-arm switching element and a lower-arm switching element;a power-supply shunt resistance that is provided on a current path between the inverter and the DC power supply;respective-phase lower-arm shunt resistances that are provided between the power-supply shunt resistance and the lower-arm switching elements for respective phases, respectively;a first overcurrent detection unit to detect overcurrent of a current that flows through the power-supply shunt resistance;a second overcurrent detection unit to detect overcurrent of at least one of currents that flow through the respective-phase lower-arm shunt resistances; anda control unit to check overcurrent by using either one of a detection result of the first overcurrent detection unit and a detection result of ...

METHOD AND APPARATUS FOR SEALING MOTOR TERMINALS

A wire insulator apparatus includes an insulator/separator member, a cap portion, a tube and potting material. The insulator/separator member has apertures formed therein for receiving a plurality of wires. By threading the wires through the insulator/separator member, the wires are spaced apart so that a potting material can be molded to provide a complete seal from the environment, particularly conductive liquids such as ammonia, which may cause short-circuiting between the wires. Individual wires are terminated in the cap portion, and the cap portion, the insulator/separator member and the wire ends are positioned within a tube or a mold portion depending on the application, and a potting epoxy is fluidly inserted within the tube. The epoxy surrounds or encases the wire ends within the tube or mold to insulate the wire ends in an airtight seal. 1. A sealed wire insulator for sealing motor terminals of a semi-hermetic compressor in an electrically conductive environment , the sealed wire insulator comprising:an insulator/separator member comprising a plurality of apertures, wherein the plurality of apertures are configured to receive and thread a plurality of wire strands through the insulator/separator member, the plurality of wire strands extends from a motor or compressor housing of the semi-hermetic compressor, the insulator/separator member separates adjacent wire strands of the plurality of wire strands to create a space between the adjacent wire strands;potting epoxy disposed in the space between the adjacent wire strands, wherein the potting epoxy is configured to provide an air tight seal between each of the plurality of wire strands and the adjacent wire strands and from the electrically conductive environment; anda hollow casing surrounding the insulator/separator member, the potting epoxy, and at least a portion of the plurality of wire strands.2. The sealed wire insulator of claim 1 , wherein the potting epoxy seals each of the plurality of wire ...

EFFICIENT AIR CONDITIONING IN CONJUNCTION WITH POOL FILTRATION

An A/C system for a building used in conjunction with a pool comprises a pool pump used to filter and circulate the pool water that is coupled to an A/C refrigerant compressor unit. The A/C compressor supplies refrigerant to an evaporator coil inside of a building that is used in in conjunction with other standard A/C components located inside the building to cool the building. The pool pump is mechanically coupled to the compressor so that the pool pump motor drives both the pool pump and the compressor when the compressor is being used to move refrigerant. The compressor is connected to a water-cooled condenser coil inside of a water tank that receives water circulated from the pool pump to cool gaseous refrigerant returned from the building. 1. A system , comprising:a. a pool pump configured to circulate water in a pool;b. a compressor configured to circulate a refrigerant to an air conditioner; andc. a mechanical coupling between the pool pump and the compressor that enables a motor of the pool pump to drive the compressor.2. The system of claim 1 , further comprising an electromagnetic clutch configured to engage when the compressor turns on and disengage when the compressor turns off claim 1 , wherein the motor of the pool pump is configured to drive the compressor when the electromagnetic clutch is engaged.3. The system of claim 1 , wherein the compressor is directly coupled to the motor of the pool pump and includes a displacement valve that is configured to cause the compressor to circulate the refrigerant when the displacement valve is powered.4. The system of further comprising a gas condenser coil containing the refrigerant claim 1 , the gas condenser coil coupled to the compressor and configured to cool the refrigerant circulated by the compressor claim 1 , wherein the condenser coil is configured to be cooled with water ejected from the pool pump.5. The system of claim 1 , wherein the gas condenser coil is located within a water tank.6. The system of ...

START-STOP CONTROL SYSTEMS AND METHODS FOR GAS FOIL BEARING MACHINE

An HVAC system includes an unloading device, a centrifugal compressor, a gas foil bearing, a VFD and a controller. The controller is programmed to start the centrifugal compressor from a stopped condition by operating the unloading device to remove a load from the centrifugal compressor, accelerating the motor to a first speed above a liftoff speed of the gas foil bearing and below an operating speed of the centrifugal compressor, running the motor for a period of time, operating the unloading device to apply the load to the centrifugal compressor, and accelerating the motor to the operating speed. 1. An HVAC system comprising:an unloading device; and a compressor housing;', 'a motor having a driveshaft rotatably supported within the compressor housing;', 'an impeller connected to the driveshaft and operable to compress refrigerant gas upon rotation of the driveshaft;', 'a gas foil bearing supported by the compressor housing and supporting the driveshaft; and', operating the unloading device to remove a load from the centrifugal compressor,', 'accelerating the motor to a first speed above a liftoff speed of the gas foil bearing and below an operating speed of the centrifugal compressor,', 'running the motor at the first speed for a period of time,', 'operating the unloading device to apply the load to the centrifugal compressor, and', 'accelerating the motor to the operating speed., 'start the centrifugal compressor from a stopped condition by, 'a controller connected to the motor and the unloading device, the controller programmed to], 'a centrifugal compressor comprising2. The HVAC system of claim 1 , wherein the controller is further programmed to stop the centrifugal compressor from an operating condition by:operating the unloading device to remove a load from the centrifugal compressor,decelerating the motor toward a minimum speed greater than zero, andremoving power from the motor when the speed of the motor reaches the minimum speed and allowing the motor to ...

SINGLE PHASE INDUCTION MOTORS INCLUDING ALUMINUM WINDINGS AND HIGH PERMEABILITY LOW CORELOSS STEEL

A single phase induction motor includes a stator core having a stator yoke and a plurality of teeth extending toward a central opening. The plurality of teeth are spaced apart from one another and define multiple slots between the teeth for receiving windings of the single phase induction motor. The stator core includes a high permeability low coreloss (HPLC) steel having a relative permeability of greater than or equal to 3000 at 1.5 Tesla and 60 Hertz, and a coreloss of less than or equal to 1.75 watts/lb at 1.5 Tesla and 60 Hertz. The motor also includes multiple windings located within the plurality of slots and wrapped around the plurality of teeth of the stator core. Each of the multiple windings include aluminum wire. The motor further includes a rotor body located concentrically within the stator core and including an external surface that faces the stator core. 1. A single phase induction motor comprising:a stator core including a stator yoke and a plurality of teeth extending from the stator yoke toward a central opening, the central opening extending from a first end of the stator core to a second end of the stator core opposite the first end, the plurality of teeth spaced apart from one another and defining a plurality of slots between the plurality of teeth for receiving windings of the single phase induction motor, the stator core comprising a high permeability low coreloss (HPLC) steel having a relative permeability of greater than or equal to 3000 at 1.5 Tesla and 60 Hertz, and a coreloss of less than or equal to 1.75 watts/lb at 1.5 Tesla and 60 Hertz;multiple windings located within the plurality of slots and wrapped around the plurality of teeth of the stator core, each of the multiple windings comprising aluminum wire; anda rotor body located concentrically within the stator core, the rotor body including an external surface that faces the stator core.2. The motor of claim 1 , wherein the multiple windings comprise a hybrid of aluminum and copper ...

LIQUID RESERVOIR, METHOD FOR MANUFACTURING SAME, AND COMPRESSOR HAVING SAME

A liquid reservoir, a method for manufacturing the liquid reservoir, and a compressor having the liquid reservoir are disclosed. The liquid reservoir has a barrel, an air inlet tube, an air outlet tube, and a valve. The valve has a partition plate arranged in the barrel. An outer periphery of the partition plate is coupled to an inner peripheral wall of the barrel to divide the internal space of the barrel into an air inlet chamber and an air outlet chamber. The partition plate has a valve hole communicating the air inlet chamber with the air outlet chamber. A limit plate is arranged in the air outlet chamber and at least partially spaced apart from the partition plate. An outer periphery of the limit plate is coupled to the inner peripheral wall of the barrel. The limit plate has a connection hole and a guide hole. 1. A liquid reservoir comprising:a barrel having an air inlet at an upper end of the barrel and an air outlet at a lower end of the barrel;an air inlet tube coupled to the air inlet;an air outlet tube coupled to the air outlet; and{'claim-text': ['a partition plate arranged in the barrel, an outer periphery of the partition plate being coupled to an inner peripheral wall of the barrel to divide an internal space of the barrel into an air inlet chamber in communication with the air inlet and an air outlet chamber in communication with the air outlet, and the partition plate having a valve hole communicating the air inlet chamber with the air outlet chamber; and', 'a limit plate arranged in the air outlet chamber and at least partially spaced apart from the partition plate, an outer periphery of the limit plate being coupled to the inner peripheral wall of the barrel, and the limit plate having a connection hole and a guide hole.'], '#text': 'a valve arranged in the barrel, the valve comprising:'}2. The liquid reservoir according to claim 1 , wherein:the barrel has a plurality of annular protrusions formed on an inner wall of the barrel,an upper surface of ...

MINIATURE LOW-VIBRATION ACTIVE COOLING SYSTEM WITH CONICAL ROTARY COMPRESSOR

A system for cryocooling an optical sensor on a satellite to a temperature below 200K with minimal vibration comprising a miniature conical rotary screw compressor comprising an inner element configured to only rotate around a first stationary axis and an outer element configured to only rotate around a second stationary axis so that both elements revolve with minimal vibration; with at least one of a) a length of at least one of the inner element and the outer element is between 10 mm and 50 mm; b) a diameter of at least one of the inner element and the outer element is between 2 mm and 25 mm; c) a compression ratio of the rotary screw compressor is between 1:2 and 1:20; and d) a shaft speed of the conical rotary screw compressor is between 6001 and 20000 revolutions per minute. 1200. An active cryocooling system for cooling the sensors in a satellite to a temperature below K with minimal vibration comprising:a miniature conical rotary screw compressor comprising an inner element configured to rotate around a first stationary axis and an outer element configured to rotate around a second stationary axis so that the axes are inclined to each other and both elements revolve with minimal vibration;a condenser in communication with black radiation panels;an expansion device;an evaporator connected with sensors;a refrigerant; and wherein:a) a length of at least one of the inner element and the outer element of the rotary screw compressor is between 10 mm and 50 mm;b) a diameter of at least one of the inner element and the outer element of the rotary screw compressor is between 2 mm and 25 mm;c) a compression ratio of the rotary screw compressor is between 1:2 and 1:20; andd) a shaft speed of the rotary screw compressor is between 6001 and 20000 revolutions per minute; ande) the refrigerant comprises at least one of krypton, methane, and a mixture thereof.2. An active cryocooling system according to claim 1 , wherein the active cryocooling system is for removing heat ...

REFRIGERANT COMPRESSOR AND FREEZER INCLUDING SAME

The present invention includes: an electric component; a compression component driven by the electric component to compress a refrigerant; and a sealed container accommodating the electric component and the compression component. The compression component includes: a shaft part rotated by the electric component; and a bearing part slidingly contacting the shaft part such that the shaft part is rotatable. A film having hardness equal to or more than hardness of a sliding surface of the bearing part is provided on a sliding surface of the shaft part. The sliding surface of the bearing part includes a curved-surface portion having an inner diameter that continuously increases in a curved shape toward an end of the bearing part in a center axis direction of the bearing part, or the sliding surface of the shaft part includes a curved-surface portion having an outer diameter that continuously decreases in a curved shape toward an end of the shaft part in a center axis direction of the shaft part. 1. A refrigerant compressor comprising:an electric component;a compression component driven by the electric component to compress a refrigerant; anda sealed container accommodating the electric component and the compression component, wherein: a shaft part rotated by the electric component and', 'a bearing part slidingly contacting the shaft part such that the shaft part is rotatable;, 'the compression component includes'}a sliding surface of the bearing part includes a curved-surface portion having an inner diameter that continuously increases in a curved shape toward an end of the bearing part in a center axis direction of the bearing part; anda corner of the shaft part is opposed to a position of the bearing part, the position being located closer to the end of the bearing part in the center axis direction than the curved-surface portion.23-. (canceled)4. The refrigerant compressor according to claim 1 , wherein the curved-surface portion of the bearing part is formed such ...

ELECTRIC MOTOR, COMPRESSOR, FAN, AND REFRIGERATING AND AIR CONDITIONING APPARATUS

An electric motor includes a rotor including a first rotor end and a second rotor end, and a stator including a first stator end and a second stator end. The first rotor end is located apart from the first stator end toward the first side. The second rotor end is located apart from the second stator end toward the first side. The relationship between the distances D and D satisfies DD0, where D is a distance from a permanent magnet to a first end plate, and D is a distance from the permanent magnet to a second end plate. The thickness of each of a plurality of electrical steel sheets is not less than 0.1 mm and not more than 0.25 mm. 1. An electric motor comprising:a stator including a first stator end located on a first side in an axial direction, a second stator end located on a second side opposite to the first side in the axial direction, a tooth extending in a radial direction, and a winding wound around the tooth; anda rotor including a rotor core including a plurality of electrical steel sheets laminated in the axial direction, a magnet insertion hole, a first rotor end located on the first side, and a second rotor end located on the second side, a permanent magnet inserted in the magnet insertion hole, a shaft fixed to the rotor core and supported only on the second side, a first end plate covering the first side of the magnet insertion hole, and a second end plate covering the second side of the magnet insertion hole,wherein the first rotor end is located apart from the first stator end toward the first side in the axial direction,the second rotor end is located apart from the second stator end toward the first side in the axial direction,{'b': 1', '2', '1', '2', '1', '2, 'a relationship between a distance D and a distance D satisfies D>D≥0, where D is a distance from the permanent magnet to the first end plate, and D is a distance from the permanent magnet to the second end plate, and'}a thickness of each of the plurality of electrical steel sheets is not ...

ROTARY ELECTRIC MACHINE AND AIR CONDITIONING APPARATUS

A rotary electric machine includes a rotor core that rotates about a rotation axis, a plurality of first magnets disposed in a circumferential direction of the rotor core and embedded in the rotor core, a second magnet that includes a plurality of magnetic poles disposed in the circumferential direction of the rotor core and is disposed on an end surface of the rotor core in an extending direction of the axis, the second magnet being disposed at a position in a direction orthogonal to the axis, different from positions at which the plurality of first magnets are disposed, and a stator provided on an outer side of the rotor core in the direction orthogonal to the rotation axis. 1. A rotary electric machine , comprising:a rotor core that rotates about a rotation axis;a plurality of first magnets disposed in a circumferential direction of the rotor core and embedded in the rotor core;a second magnet that includes a plurality of magnetic poles disposed in the circumferential direction of the rotor core and is disposed on an end surface of the rotor core in an extending direction of the rotation axis, the second magnet being disposed, in a direction orthogonal to the rotation axis, on a radially outer side of the first magnets at a position that does not overlap positions at which the plurality of first magnets are disposed; anda stator provided on an outer side of the rotor core in the direction orthogonal to the rotation axis.2. (canceled)3. The rotary electric machine according to claim 1 , wherein a first interpolar portion between adjacent ones of the first magnets and a second interpolar portion between adjacent ones of the magnetic poles are disposed at an identical position in the circumferential direction.4. The rotary electric machine according to claim 3 , wherein the first magnets are disposed away from an inner side of a portion between the adjacent magnetic poles in the direction orthogonal to the rotation axis.5. The rotary electric machine according to ...

Equalization System of Compressors Pressure, Equalization Pressure Method and System Operation in Cooling Hermetic Compressors

The present invention describes a valve mechanism for refrigerating machines compressors. More specifically, the valve mechanism operates to allow the equalization of pressure between the compression chamber of a reciprocating compressor and the discharge volume of the same compressor. This equalization is aimed at reducing the torque required for departure. The present invention lies in the field of mechanical engineering, more specifically in the field of fluid and cooling mechanics. 1. Pressure equalization system for compressor characterized by:a. at least one primary valve mechanism provided pressure equalization means between the discharge volume and inlet volume; andb. at least one secondary valve mechanism provided with means to hold the backflow of the pressurized working fluid comprised in the output line of the compressor;wherein the primary valve mechanism is comprised upstream of the valve mechanism; andwherein the secondary valve mechanism is downstream of the primary valve mechanism and in fluid communication with the compressor outlet line.2. System according to claim 1 , characterized by the compressor being comprised within a hermetic volume enclosed in a hermetic case.3. System according to claim 1 , characterized in that for cooling systems.4. The compressor pressure equalization method characterized by a pressure equalization system as defined in and in which the primary mechanism of valve promotes pressure equalization between the discharge volume and the intake volume at a time before the start of the compressor.5. Pressure equalization method claim 4 , according to claim 4 , characterized by said pressure equalization promotion be started by receiving a starting signal from the compressor.6. Use of compressor pressure equalization system claim 1 , as defined in claim 1 , characterized for being in hermetic compressor for refrigeration systems. The present invention describes a valve mechanism for compressors. The present invention lies in the ...

Refrigerator with a compressor

Refrigerator ( 2 ), comprising a coolant compressor ( 50 ) which comprises a hermetically sealed housing ( 52 ) as well as a drive unit arranged inside said housing with a unit for cyclic compression of a coolant and an electric motor for driving said unit, whereby said coolant compressor ( 50 ) further comprises at least one connecting part ( 70 ) for connecting said compressor ( 50 ) to a mounting structure ( 64 ) of said refrigerator ( 2 ), whereby said connecting part ( 70 ) comprises an inner element ( 82 ) and an outer element ( 84 ) encompassing said inner element ( 82 ), whereby said inner element ( 82 ) has a larger stiffness compared to said outer element ( 84 ), whereby both said inner element ( 82 ) and said outer element ( 84 ) are built as having respective elastic elements ( 82, 84 ).

FUEL DRIVEN NEAR ISOTHERMAL COMPRESSOR

A gas compressor system includes a compression liquid holding tank in fluid communication with a combustion tank. A combustible fluid is directed to the combustion tank. An ignition system is provided for igniting the combustible fluid. A compression liquid flows between the liquid holding tank, the combustion tank, and a compression tank. A compressible gas is provided in the compression tank. The ignition of the combustible fluid drives the compression liquid from the combustion tank to the compression tank, compressing the compressible liquid. An HVAC&R system and a method of compressing gas are also disclosed. 1. A gas compressor system , comprising:a compression liquid holding tank;a combustion tank having a compression liquid inlet in fluid communication with the compression liquid holding tank, a combustible fluid inlet for fluid communication with a combustible fluid source, an ignition system for igniting the combustible fluid, and a compression liquid flow opening;a compression liquid;a pump for pumping the compression liquid from the compression liquid holding tank to the combustion tank;a compression tank having a compression liquid flow opening, the compression liquid flow opening of the compression tank being in liquid communication with the compression liquid flow opening of the combustion tank;a valve for controlling flow of the compression liquid between the compression liquid holding tank and the combustion tank;a valve for controlling fluid communication between the combustion tank and the compression tank;a valve for controlling the flow of combustible fluid with the combustion tank;a compressible gas;wherein, the combustible fluid is flowed into the combustion tank and compressible gas is provided in the compression tank, the compression liquid is pumped by the pump from the compression liquid holding tank to the combustion tank, compressing the combustible fluid, the combustible fluid is ignited by the ignition system causing the compression ...

LINEAR COMPRESSOR

A linear compressor includes a cylinder, a discharge valve, a valve spring pressing the discharge valve to close one side of the cylinder, and a spring support portion providing a support point for the valve spring to press the discharge valve. The valve spring includes a first spring arm whose center is connected to the discharge valve and extending spirally, a second spring arm spaced apart from the first spring arm by a predetermined distance with respect to an axial direction of the cylinder and extending spirally toward an outer portion according to a shape of the first spring arm, and a rubber damper connecting the first spring arm and the second spring arm and fixing relative positions of the first spring arm and the second spring arm. 1. A linear compressor comprising:a cylinder that receives a piston and that defines a movement path for the piston;a discharge valve that is configured to open and close a side of the cylinder and that defines a compression space for a refrigerant with the piston based on the discharge valve closing the side of the cylinder;a valve spring configured to press the discharge valve to close the side of the cylinder; and an outer circumferential surface that is coupled to a discharge cover, and', 'an inner circumferential surface that is coupled to the outer portion of the valve spring,, 'a spring support portion configured to support the valve spring, the spring support portion including a central portion that is connected to the discharge valve;', 'an outer portion that is spaced apart from the central portion and disposed radially from the central portion;', 'at least one first spring arm that spirally extends from the central portion;', 'at least one second spring arm that is spaced apart from the at least one first spring arm in an axial direction of the cylinder, that spirally extends from the outer portion, and that corresponds to a shape of the at least one first spring arm; and', 'a rubber damper that connects the at least ...

MOTOR DRIVE DEVICE AND AIR CONDITIONER

A motor drive device includes an inverter output unit that drives a motor using electrical power supplied from a supply power generation unit, a voltage detection snit that detects a voltage value of a DC voltage, a current detection unit, a current limiting resistor and a current change-over switch connected is parallel between a bus and the voltage detection unit, and a motor drive control unit that controls the inverter output unit based on the voltage value and controls turning on and off of the current change-over switch based on the current value. The motor drive control unit turns on the current change-over switch when the motor is to be driven, and turns off the current change-over switch when the current value changes only by an amount less than a first threshold in a first time period during driving of the motor. 1. A motor drive device comprising:a supply power generator to convert electrical power supplied from a commercial power supply, into direct current electrical power;an inverter output circuit to drive a motor using electrical power supplied from the supply power generator;a voltage detector to detect a voltage value of a direct current voltage being applied to the inverter output circuit by the supply power generator;a current t detector to detect a current value of a current being supplied from the inverter output circuit to the motor;a current limiting resistor and a current change-over switch connected in parallel between a bus and the voltage detector, the bus connecting the supply power generator and the inverter output circuit to each other, wherein the current change-over switch switches a short circuit path between both ends of the current limiting resistor to either an ON state or an OFF state; andfirst processing circuitry to control the inverter output circuit based on a detection result of the voltage detector and to control turning on and off of the current change-over switch based on the current value, wherein{'claim-text': [' ...

DC POWER SUPPLY DEVICE AND AIR CONDITIONER

A DC power supply device includes: a rectifier circuit; a reactor connected at one end to one output terminal of the rectifier circuit; a charging unit including a first and second switching element connected in series between another end of the reactor and another output terminal of the rectifier circuit, the charging unit configured to charge a first and second capacitor connected in series between output terminals to which a load is connected; and a control unit that controls the charging unit. The control unit sets, based on the timing at which the zero-crossing occurs, a dead time in which both the and second switching element are off, and when states of the first and second switching element at a time of occurrence of the zero-crossing match a predetermined set of states, reverses the states of the first switching element and the second switching element.

SCROLL TYPE COMPRESSOR

A scroll type compressor includes a motor including a rotor; a rotatable shaft coupled to the rotor; a frame disposed adjacent to the motor to support the rotatable shaft; a fixed scroll coupled to the frame; an orbiting scroll eccentrically coupled to the rotatable shaft, wherein the orbiting scroll is engaged with the fixed scroll to orbit relative to the fixed scroll; and a balance weight including: a coupling portion having an inner opening defined therein receiving the rotatable shaft, wherein the coupling portion is coupled to and between the rotor and the frame; and a weight portion extending from an outer periphery of the coupling portion. 1. A scroll type compressor comprising:a casing that defines an inner space therein;a motor disposed in the inner space of the casing and configured to generate a rotating force, the motor comprising a stator and a rotor;a rotatable shaft coupled to the rotor of the motor;a frame disposed at a side of the motor and configured to support the rotatable shaft;a fixed scroll coupled to the frame, the fixed scroll and the frame defining a compressing chamber therebetween;an orbiting scroll that is eccentrically coupled to the rotatable shaft, that is located in the compressing chamber, and that is engaged with the fixed scroll, the orbiting scroll being configured to orbit relative to the fixed scroll; and a coupling portion that defines an inner opening therein receiving the rotatable shaft, the coupling portion being coupled to the rotatable shaft at a position between the rotor and the frame, and', 'a weight portion that extends from an outer periphery of the coupling portion., 'a balance weight comprising2. The scroll type compressor of claim 1 , wherein the rotatable shaft comprises a stopping shoulder that protrudes from an outer circumferential surface of the rotatable shaft claim 1 , andwherein the balance weight is coupled to a position between the rotor and the stopping shoulder.3. The scroll type compressor of claim ...

SYSTEM AND METHOD OF OPERATING A VARIABLE SPEED COMPRESSOR WITH A TWO-STAGE CONTROLLER

A system and method of operating an HVAC system including a HVAC unit including a unit temperature sensor, a unit controller, and a variable speed compressor, and a two-stage system controller in communication with the unit controller, the method including operating the system controller to transmit a conditioning signal to the unit controller based in part on a system demand, operating the unit controller to receive the conditioning signal, and receive outdoor air temperature data from the unit temperature sensor, operating the unit controller to determine whether the outdoor air temperature data is greater than or equal to a cooling temperature limit or less than or equal to a heating temperature limit, and operating the unit controller to transmit a speed signal to the compressor based in part on the plurality of conditioning signals and the outdoor air temperature data. 1. A method for operating an HVAC system , the HVAC system including an HVAC unit including a unit temperature sensor , a unit controller , and a compressor configured to operate at multiple speeds , and a two-stage system controller in communication with the unit controller , the method comprising:(a) operating the two-stage system controller to transmit a conditioning signal to the unit controller based in part on a system demand;(b) operating the unit controller to receive the conditioning signal, and receive outdoor air temperature data from the unit temperature sensor;(c) operating the unit controller to determine whether the outdoor air temperature data is greater than or equal to a cooling temperature limit or less than or equal to a heating temperature limit; and(d) operating the unit controller to transmit a speed signal to the compressor based in part on the conditioning signal and the outdoor air temperature data.2. The method of claim 1 , wherein the step (a) further comprises operating the two-speed system controller to transmit at least one of a first cooling conditioning signal ...

MOTOR DRIVE APPARATUS AND AIR CONDITIONER

A motor drive apparatus which drives a motor includes inverter modules equal in number to phases of the motor. Each of the inverter modules includes a plurality of switching element pairs. Each of the switching element pairs is defined by two switching elements connected in series. In each of the inverter modules, the plurality of switching element pairs are connected in parallel, and each of resistance values of gate resistors connected to the switching elements is set for the corresponding switching element connected thereto. 1. A motor drive apparatus that drives a motor , the apparatus comprising inverter modules equal in number to phases of the motor , whereineach of the inverter modules comprises a plurality of switching element pairs, each of the switching element pairs being defined by two switching elements connected in series, andin each of the inverter modules, the plurality of switching element pairs are connected in parallel, and each of resistance values of gate resistors connected to the switching elements is set for a corresponding switching element connected thereto.2. The motor drive apparatus according to claim 1 , wherein a wiring length of a signal line that transmits a driving signal for each of the switching elements and a magnitude of the gate resistor are inversely related to each other.3. The motor drive apparatus according to claim 1 , wherein a magnitude of an inductance value of wiring of a signal line that transmits a driving signal for each of the switching elements and a magnitude of the gate resistor are inversely related to each other.4. The motor drive apparatus according to claim 1 , wherein the gate resistor is a variable resistor having a resistance value variable.5. The motor drive apparatus according to claim 4 , whereineach of the inverter modules comprises, for each gate resistor,a storage unit that stores information on the resistance value of the gate resistor, andan adjustment unit that reads the information on the ...

CLOSED COMPRESSOR AND REFRIGERATION DEVICE USING THE SAME

A closed compressor is provided with a flexible oil fence, of which a fixed portion as one end is fixed onto an upper surface of a cylinder between a shaft and a cylinder head and a free end as the other end extends toward an upper inner surface of a closed container. According to this configuration, a collision sound can be prevented from being generated even when the oil fence collides with the upper inner surface of the closed container and hot oil can be prevented from flowing along a surface of suction muffler. 1. A closed compressor comprising:a closed container that reserves oil and accommodates an electric unit and a compression unit driven by the electric unit, a shaft that is constituted by a main shaft portion and an eccentric shaft portion and includes an oil supply passage in which a lower end of the main shaft portion is immersed in the oil and an upper end portion of the eccentric shaft portion opens into the closed container,', 'a cylinder that is disposed being separated from the shaft in a lateral direction,', 'a cylinder head that is disposed being further separated from the shaft in the lateral direction and is disposed beside the cylinder, and', 'a suction muffler that is disposed below the cylinder head and through which a refrigerant gas passes, and, 'wherein the compression unit includes'}wherein a flexible oil fence, of which a fixed portion as one end is fixed onto an upper surface of the cylinder between the shaft and the cylinder head and a free end as the other end extends toward an upper inner surface of the closed container, is provided.2. A closed compressor comprising:a closed container that reserves oil and accommodates an electric unit and a compression unit driven by the electric unit, a shaft that is constituted by a main shaft portion and an eccentric shaft portion and includes an oil supply passage in which a lower end of the main shaft portion is immersed in the oil and an upper end portion of the eccentric shaft portion opens ...

ELECTRIC COMPRESSOR

Provided is an electric compressor in which there are fewer instances of a magnetic force line being blocked more than necessary by a through-hole for a bolt, the number of components and number of machining steps do not increase as much, and the degree of adhesion of a laminated steel plate can be increased to ensure stiffness. A stator has a stator core () configured by laminating a plurality of electromagnetic steel plates in an axial direction, the electromagnetic steel plates having a substantial ring shape as seen from the axial direction. As seen from the axial direction, a plurality of through-holes () are formed through the stator core () in the lamination direction of the electromagnetic steel plates, on the same circle centered around the axis line, and as seen from the axial direction, a first arc length (L) or a second arc length (L) longer than the first arc length (L) is set as each arc length between through-holes () adjacent in the circumferential direction. The stator is secured to a housing by a bolt inserted through the through-holes (), the stator core () is varnished at least in areas near the centers in the circumferential direction between through-holes () where the second arc length (L) is set. 1. An electric compressor comprising:an electric motor having a stator and a rotor;a drive shaft fixed to the rotor, and rotating around an axis by the electric motor;a compression mechanism provided on one end side of the drive shaft, and driven by the drive shaft; anda housing that houses the electric motor, the drive shaft, and the compression mechanism,wherein the stator has a stator core formed such that a plurality of electromagnetic steel sheets having a substantially annular shape are laminated in a direction of the axis when viewed in the direction of the axis,when viewed in the direction of the axis, in the stator core, a plurality of through-holes penetrating in a lamination direction of the electromagnetic steel sheets are formed on the ...

CENTRIFUGAL COMPRESSOR WITH RECIRCULATION STRUCTURE

A centrifugal compressor for a chiller system includes a casing having an inlet portion and an outlet portion, a recirculation structure including a recirculation path and a recirculation discharge cavity, an impeller disposed downstream of the recirculation discharge cavity, the impeller being attached to a shaft rotatable about a shaft rotation axis, a motor arranged to rotate the shaft in order to rotate the impeller, and a diffuser disposed in the outlet portion downstream of the impeller. The recirculation structure is configured and arranged to impart a swirl to a flow of refrigerant into the inlet portion, with a velocity of a recirculation flow caused by the swirl being higher than a velocity of the flow of the refrigerant in the inlet portion. 1. A centrifugal compressor adapted to be used in a chiller system , the centrifugal compressor comprising:a casing having an inlet portion and an outlet portion;a recirculation structure including a recirculation path and a recirculation discharge cavity;an impeller disposed downstream of the recirculation discharge cavity, the impeller being attached to a shaft rotatable about a shaft rotation axis;a motor arranged to rotate the shaft in order to rotate the impeller; anda diffuser disposed in the outlet portion downstream of the impeller, the recirculation structure being configured and arranged to impart a swirl to a flow of refrigerant into the inlet portion, with a velocity of a recirculation flow caused by the swirl being higher than a velocity of the flow of the refrigerant in the inlet portion.2. The centrifugal compressor according to claim 1 , whereina plurality of recirculation discharge guide vanes are disposed to surround the recirculation discharge cavity, the plurality of recirculation discharge guide vanes being circumferentially arranged with respect to the shaft rotation axis of the shaft, andthe recirculation path includes a recirculation pipe which introduces refrigerant toward the plurality of ...

EMBEDDED PERMANENT MAGNET-TYPE ELECTRIC MOTOR, COMPRESSOR, AND REFRIGERATION/AIR-CONDITIONING DEVICE

In an interior permanent magnet motor, a magnet insertion hole of a rotor core is curved into an arc shape, and a convex portion side of the arc shape is arranged on a center side of a rotor. The magnet insertion hole has a first line, a second line, and a pair of third lines. The first line is located on the radially outer side of the second line. Each of the third lines connects the first line and the second line to each other. The first line includes an arc portion and a pair of concave portions. Each of the concave portions is located at an end of the arc portion of the first line. 1. An interior permanent magnet motor , comprising:a rotor comprising a permanent magnet; anda stator,wherein the rotor further comprises a rotor core,wherein the rotor core has a magnet insertion hole and a slit,wherein the permanent magnet is inserted into the magnet insertion hole,wherein the magnet insertion hole is curved into an arc shape, and a convex portion side of the arc shape is arranged on a center side of the rotor,wherein the slit is arranged in a region of the rotor core, which is located on a radially outer side of the magnet insertion hole,wherein the magnet insertion hole has a first line, a second line, and a pair of third lines,wherein the first line is located on the radially outer side of the second line,wherein each of the third lines connects the first line and the second line to each other,wherein the first line comprises an arc portion and a pair of concave portions, and wherein each of the concave portions is located only on the first line.2. An interior permanent magnet motor according to claim 1 , wherein the slit is formed at a position closer to the third lines than to a magnetic pole center line.3. An interior permanent magnet motor according to claim 1 , wherein core thin portions are respectively provided between the slit and the magnet insertion hole and between the slit and the a rotor outer peripheral surface.4. An interior permanent magnet motor ...

PERMANENT-MAGNET DYNAMO-ELECTRIC MACHINE AND COMPRESSOR USING THE SAME

A rotor is formed such that a concave section is formed on the q axis and a gap between the concave section and a tooth of a stator is larger than a gap between an outer circumferential section and the tooth on the d axis. The concave section is formed in a substantially trapezoidal shape and formed such that an opening degree θp2 on an outer circumference side is large with respect to an opening degree θp1 on an inner circumference side. The opening degree θp2 is set within a range of approximately 60 degrees in the electrical angle. A slit is not formed near the d axis on the outer circumference side of the permanent magnet insertion hole and a plurality of slits are formed on left and right both sides a predetermined distance or more apart from the d axis. 1. A permanent magnet type dynamoelectric machine comprising:a stator including teeth wound with an armature winding;a rotor disposed on an inside of the stator via a gap;a plurality of magnet insertion holes formed in the rotor; anda permanent magnet disposed in each of the plurality of magnet insertion holes, whereinwhen a magnetic flux axis of the permanent magnet is represented as a d axis and an axis orthogonal to the d axis in an electrical angle is represented as a q axis, the rotor is formed such that a concave section recessed to an inner circumference side is formed on the q axis and a gap between the concave section and the tooth is larger than a gap between an outer circumferential section and the tooth of the stator on the d axis,the concave section is formed in a substantially trapezoidal shape and formed such that an opening degree θp2 at left and right both ends on an outer circumference side is large with respect to an opening degree θp1 at left and right both ends on an inner circumference side, and the opening degree θp2 is set within a range of approximately 60 degrees in the electrical angle, anda slit is not formed near the d axis on the outer circumference side of the permanent magnet ...

MOTOR AND AIR-CONDITIONING APPARATUS

The motor includes a motor body to rotate a shaft by generating a rotating magnetic field; a bearing supporting the shaft; and a bracket being electrically non-conductive, surrounding an outer periphery of the bearing, and supporting the bearing, wherein the bracket is not in contact with any member formed of conductive material at an outer periphery of the bracket. 1. A motor comprising:a motor body to rotate a shaft by generating a rotating magnetic field;a bearing supporting the shaft; anda bracket being electrically non-conductive, surrounding an outer periphery of the bearing and supporting the bearing,wherein the bracket includes an unsaturated polyester resin as a main component, and the bracket is not in contact with any member formed of conductive material at an outer periphery of the bracket.2. The motor of claim 1 , wherein the bearing includesan outer ring having an outer periphery supported by the bracket andan inner ring rotatably connected to the outer ring and fixed to the shaft,wherein the bracket serves as an insulator preventing an electric current flowing through the shaft to the bracket from leaking to an outside via the inner ring through a surface of the outer ring, the surface being in contact with the bracket.3. The motor of claim 1 , wherein the bracket includesa bracket body provided in a center of the bracket; anda flange extending from an outer periphery of the bracket main body in a radial direction.45-. (canceled)6. An air-conditioning apparatus comprising:{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'an outdoor unit including a blower device having the motor of , a compressor, a first heat exchanger and an expansion unit; and'}an indoor unit including a second heat exchanger,wherein the compressor, the first heat exchanger, the expansion unit and the second heat exchanger are connected by a pipe so as to form a refrigerant circuit in which refrigerant circulates.7. The motor of claim 1 , wherein the bracket is a bulk molding ...

COOLING DEVICE FOR A FREQUENCY CONVERTER, CONVERTER ASSEMBLY COMPRISING SAID COOLING DEVICE AND REFRIGERATING OR CONDITIONING PLANT COMPRISING SAID CONVERTER ASSEMBLY

A cooling device for a frequency converter of a refrigerating or conditioning plant comprises at least one thermal exchange element supplied with a total flow rate of refrigerating fluid; regulating means configured to selectively regulate the total flow rate of refrigerating fluid on the basis of at least one parameter indicative of the temperature of the frequency converter. 1. A cooling device for a frequency converter of a refrigerating or conditioning plant comprising at least one thermal exchange element supplied with a total flow rate of a refrigerating fluid; regulating means configured to selectively regulate the total flow rate of refrigerating fluid on the basis of at least one parameter indicative of the temperature of the frequency converter.2. A device according to claim 1 , wherein the thermal exchange element comprises at least one first portion supplied with a first flow rate of refrigerating fluid and configured to cool a respective first region of the frequency converter; at least a second portion supplied with a second flow rate of refrigerating fluid and configured to cool a respective second region of the frequency converter; the regulating means being configured to selectively regulate the first flow rate and the second flow rate of refrigerating fluid.3. A device according to claim 1 , wherein the regulating means comprise at least a first regulating valve configured to regulate the first flow rate and a second regulating valve configured to regulate the second flow rate.4. Device according to claim 3 , wherein the regulating means comprise a control device configured to control the first regulating valve and the second regulating valve on the basis of at least a parameter indicative of the temperature of the frequency converter.5. A device according to claim 4 , wherein the control device is configured to control the first regulating valve on the basis of a first signal indicative of the temperature of the first region of the frequency ...

MOTOR DRIVE DEVICE AND REFRIGERATOR EMPLOYING SAME

Motor drive device () includes brushless DC motor () that drives a load and speed controller () that decides a PWM ON ratio for performing PWM control on brushless DC motor (). The motor drive device further includes PWM ON ratio increasing-reducing unit () that increases/reduces the PWM ON ratio in accordance with a driving speed of brushless DC motor () and drive unit () that performs PWM control for driving brushless DC motor () in accordance with the PWM ON ratio decided by PWM ON ratio increasing-reducing unit (). PWM ON ratio increasing-reducing unit () sets the PWM ON ratio to a ratio equal to or lower than the PWM ON ratio decided by speed controller () in an interval in which the driving speed of brushless DC motor () is lower than a predetermined speed, and sets the PWM ON ratio to a ratio equal to or higher than the PWM ON ratio decided by speed controller () in an interval in which the driving speed is higher than the predetermined speed. 1. A motor drive device comprising:a brushless DC motor configured to drive a load;a speed controller configured to decide a pulse width modulation (PWM) ON ratio for performing PWM control on the brushless DC motor;a PWM ON ratio increasing-reducing unit configured to increase or reduce the PWM ON ratio in accordance with a driving speed of the brushless DC motor; anda drive unit configured to perform the PWM control to drive the brushless DC motor in accordance with the PWM ON ratio decided by the PWM ON ratio increasing-reducing unit,wherein the PWM ON ratio increasing-reducing unit sets the PWM ON ratio to a ratio equal to or lower than the PWM ON ratio decided by the speed controller in an interval in which the driving speed of the brushless DC motor is lower than a predetermined speed, and sets the PWM ON ratio to a ratio equal to or higher than the PWM ON ratio decided by the speed controller in an interval in which the driving speed is higher than the predetermined speed.2. A refrigerator comprising the motor ...

COMPRESSOR AND AIR CONDITIONER HAVING THE SAME

A compressor and an air conditioner having the compressor, and a protective cover of a connecting terminal of the compressor is installed while spaced apart from a barrier of the connecting terminal. The protective cover is additionally provided with a noise preventing member. Vibration generated from the compressor is delivered to the protective cover via the barrier, but as the protective cover is provided to be spaced apart from the barrier, the vibration is delivered to the barrier through the noise preventing member. Thus, regardless of the state of vibration of the compressor, noise being generated by the protective cover is minimized. 1. A compressor , comprising:a case;a connecting terminal protruded to an outside of the case;a barrier surrounding the connecting terminal; anda protective cover mounted at the barrier,wherein the protective cover is mounted while spaced apart from a front end surface and a side surface of the barrier.2. The compressor of claim 1 , wherein:the protective cover comprises at least one noise preventing member installed so as to face the front end surface and the side surface of the barrier.3. The compressor of claim 2 , wherein:a distance from a surface at which the protective cover and the barrier are in contact to a surface corresponding to the noise preventing member is longer than a distance from a surface at which the protective cover and the barrier are in contact to the front end surface of the barrier.4. The compressor of claim 2 , wherein:the noise preventing member is provided with one unit thereof installed at an upper portion of the protective cover, and with two units thereof installed while being spaced apart from each other at a lower portion of the protective cover.5. The compressor of claim 2 , wherein:the protective cover further comprises at least one installation member extended from one end of the protective cover so as to be mounted at the barrier.6. The compressor of claim 5 , wherein:the noise preventing ...

ELECTRIC COMPRESSOR AND REFRIGERATION DEVICE HAVING SAME

An electric compressor and a refrigeration device having the same are provided. The electric compressor includes: an electric motor having a stator and a rotor; a compressing mechanism having an eccentric shaft rotatably and slidably connected to the rotor and defining a compressing chamber therein, the compressing chamber being configured to perform a compression by the eccentric shaft; and a torque damping device configured to connect the rotor with the eccentric shaft, in which during the compression of the compressing chamber, a difference between a rotation angle of the eccentric shaft and a rotation angle of the rotor is a phase angle which is increased and decreased. 1. An electric compressor , comprising:an electric motor having a stator and a rotor;a compressing mechanism having an eccentric shaft rotatably and slidably connected to the rotor and defining a compressing chamber therein, the compressing chamber being configured to perform a compression by the eccentric shaft; anda torque damping device configured to connect the rotor with the eccentric shaft,wherein during the compression of the compressing chamber, a difference between a rotation angle of the eccentric shaft and a rotation angle of the rotor is a phase angle which is increased and decreased.2. The electric compressor according to claim 1 , wherein the torque damping device comprises one of a torsion bar spring claim 1 , a helical torsion coil spring and a spiral spring which have actuation ends connected to the eccentric shaft and the rotor respectively.3. The electric compressor according to claim 2 , wherein one of the actuation ends of the torsion bar spring is mounted in the eccentric shaft.4. The electric compressor according to claim 2 , wherein a part of the actuation ends of the torsion bar spring is slidably fitted with an inner diameter of the rotor or a shaft end portion of the eccentric shaft.5. The electric compressor according to claim 2 , wherein one of the actuation ends of ...

COMPRESSOR WITH ROTOR COOLING PASSAGEWAY

A centrifugal compressor for a refrigeration system is disclosed. The centrifugal compressor includes an electric motor, which includes a rotor and a stator. The compressor further includes a housing enclosing the electric motor, a stator cooling passage provided within the housing, and a rotor cooling passageway provided within the housing. The rotor cooling passageway is independent of the stator cooling passageway. 1. A centrifugal compressor for a refrigeration system , comprising:an electric motor including a rotor and a stator;a housing enclosing the electric motor;a stator cooling passageway provided within the housing; anda rotor cooling passageway provided within the housing, the rotor cooling passageway independent of the stator cooling passageway.2. The centrifugal compressor as recited in claim 1 , wherein the electric motor is configured to rotationally drive an impeller via a shaft claim 1 , the impeller provided at an axial inlet of the housing claim 1 , wherein fluid being compressed by the impeller is substantially separated from the electric motor by a labyrinth seal.3. The centrifugal compressor as recited in claim 2 , wherein the rotor cooling passageway is provided in part between the rotor and the stator claim 2 , the rotor cooling passageway provided with a flow of fluid leaked over the labyrinth seal.4. The centrifugal compressor as recited in claim 3 , wherein the housing includes a rotor cooling outlet in communication with the rotor cooling passageway.5. The centrifugal compressor as recited in claim 4 , wherein the rotor cooling passageway is arranged such that the fluid within the rotor cooling passageway flows to the rotor cooling outlet without intermixing with fluid flowing through the stator cooling passageway.6. The centrifugal compressor as recited in claim 5 , including first and second bearing assemblies supporting the shaft claim 5 , the first bearing assembly provided downstream of the labyrinth seal and upstream of the motor ...

REFRIGERATING CYCLE DEVICE

A refrigerating cycle device includes a compressor, a motor, and a wiring switch part. The compressor compresses a refrigerant. The motor generates power for compressing the refrigerant by rotating a rotor with voltage applied to a plurality of wirings. The motor is disposed in the compressor. The wiring switch part switches between a plurality of wiring states by changing connection between the plurality of wirings. When a rotational speed of the rotor exceeds a predetermined value, the wiring switch part switches to a first wiring state of the plurality of wiring states. The first wiring state differs from a second wiring state of the plurality of wiring state. Efficiency of the second wiring state is highest at the rotational speed. 1. A refrigerating cycle device comprising:a compressor to compress a refrigerant;a motor to generate power for compressing the refrigerant by rotating a rotor with voltage applied to a plurality of wirings, the motor being disposed in the compressor; anda wiring switch part to switch between a plurality of wiring states by changing connection between the plurality of wirings;wherein when a rotational speed of the rotor exceeds a predetermined value, the wiring switch part switches to a first wiring state of the plurality of wiring states, the first wiring state differing from a second wiring state of the plurality of wiring state, efficiency of the second wiring state being highest at the rotational speed.2. The refrigerating cycle device according to claim 1 , wherein the predetermined value represents a rotational speed of the refrigerating cycle device during a rated operation.3. The refrigerating cycle device according to claim 1 , wherein the predetermined value represents a rotational speed higher than a rotation speed at a time when a temperature difference between a set temperature and a temperature detected from a substance is a predetermined temperature difference claim 1 , the set temperature being a target temperature for ...

METHOD AND SYSTEM FOR DYNAMIC POWER ALLOCATION IN A TRANSPORT REFRIGERATION SYSTEM

A method and system for dynamic power allocation in a transport refrigeration system (TRS) is provided. The method includes a TRS power source operating in an operational state. The method also includes monitoring an amount of current being drawn from one or more generator powered components of the TRS. Also, the method includes calculating, via a TRS controller of the TRS, a maximum available horsepower amount based on the amount of current being drawn from the one or more generator powered components. Further, the method includes controlling, via the TRS controller, an amount of horsepower directed to a compressor of the TRS based on the maximum available horsepower amount. 120-. (canceled)21. A method for dynamic power allocation in a transport refrigeration system (TRS) , the method comprising:monitoring an amount of current being drawn by one or more loads of the TRS;determining a load power draw based on the amount of current being drawn by the one or more loads of the TRS;determining a maximum available power amount based on the amount of current being drawn by the one or more loads; anddynamically controlling, via a controller, an amount of power directed to a compressor of the TRS to continuously allocate the maximum available power amount to the compressor of the TRS.22. The method of claim 21 , further comprising operating a TRS power source in an operational state by providing power to an electric drive motor from an electric power source.23. The method of claim 22 , wherein the electric power source includes one or more batteries.24. The method of claim 22 , wherein the one or more loads are connected to a current source connected to the electric power source.25. The method according to claim 24 , further comprising calculating the maximum available power amount based on a variable corresponding to a power efficiency of the current source.26. The method of claim 21 , wherein determining the maximum available power amount includes subtracting the load ...

Rotor with permanent magnets with flux concentration for a rotary electrical machine

A rotor with permanent magnets for a rotary electric machine including a plurality of alternating north poles and south poles and made up of a plurality of permanent magnets arranged in first recesses extending axially and distributed regularly between a circumferential portion and a central portion of the magnetic mass of the rotor such as to define a plurality of circumferential polar sections, the first recesses being separated by central tabs with a thickness E, the permanent magnets having a polygonal radial section that comprises a substantially rectangular portion next to the circumferential portion adjacent to a substantially trapezoidal portion next to the central portion. The rotor having a ratio R0 (h/E) of a first height h of the trapezoidal portion to the thickness E of a central tab is predetermined such as to maximise the efficiency of the electric machine.

Device for adsorbing oil pollution on water surface of river basin

The invention discloses a waste air-conditioning compressor recycling processing equipment, which includes a conveying box. The conveying box is provided with a conveying chamber with an opening facing upward. The conveying chamber is provided with a conveying device. Two left and right symmetrical fixing rods are fixedly connected, and a cutting box is fixedly connected to the fixed rods. The cutting box is provided with a cutting cavity with an opening facing downward, and the cutting cavity is provided with a power device. The lower side of the power unit is provided with a lifting device for providing the lifting movement required for cutting. The lower side of the lifting device is provided with a cutting device for cutting the compressor. The right side of the cutting device is provided for quickly clamping and fixing the compressor and the The clamping device for conveying the cut off compressor upper cover plate to the storage place can realize automatic clamping and fixing of the compressor, the installation and fixing process is simple, and the overall processing efficiency is improved. 1. A waste air-conditioning compressor recycling processing equipment , including a transmission box; the conveying box is provided with a conveying cavity with an upward opening therein , and a conveying device for conveying a compressor is provided in the conveying cavity. Two left and right symmetrical fixing rods are fixedly connected to the upper end surface of the conveying cavity. A cutting box is fixedly connected to the fixing rod , the cutting box is provided with a cutting cavity with an opening facing downward , a power device is arranged in the cutting cavity , and a lifting movement required for cutting is provided on the lower side of the power device. A lifting device is provided on the lower side of the lifting device , a cutting device for cutting the compressor is provided on the right side of the cutting device , and a clamping device is provided on the ...

SEALED REFRIGERANT COMPRESSOR AND REFRIGERATION DEVICE INCLUDING SAME

A sealed refrigerant compressor () includes: a compression element () accommodated in a sealed container () and configured to compress a refrigerant; and an electric element () configured to drive the compression element (). Lubricating oil () is stored in the sealed container (). The lubricating oil () is mixed oil constituted by at least mineral oil and synthetic oil. Kinetic viscosity of the lubricating oil () at 40° C. falls within a range of 0.1 to 5.1 mm/s, and a flash point of the lubricating oil () is 110° C. or more. 1. A sealed refrigerant compressor comprising:a compression element accommodated in a sealed container and configured to compress a refrigerant; andan electric element configured to drive the compression element, wherein:lubricating oil is stored in the sealed container;the lubricating oil is mixed oil constituted by at least mineral oil and synthetic oil;{'sup': '2', 'kinetic viscosity of the lubricating oil at 40° C. falls within a range of 0.1 to 5.1 mm/s; and'}a flash point of the lubricating oil is 110° C. or more.2. The sealed refrigerant compressor according to claim 1 , wherein a content of the synthetic oil in the lubricating oil falls within a range of 0.1 to 40.0 wt. % of an entire amount of the lubricating oil.3. The sealed refrigerant compressor according to claim 1 , wherein the synthetic oil is at least one selected from the group consisting of ester oil claim 1 , ether oil claim 1 , polyalkylene glycol oil claim 1 , and alkyl benzene oil.4. The sealed refrigerant compressor according to claim 1 , wherein at least one of additives that are an extreme pressure additive claim 1 , an oily agent claim 1 , an antifoaming agent claim 1 , and a stabilizing agent is added to the lubricating oil.5. The sealed refrigerant compressor according to claim 4 , wherein a content of the additive falls within a range of 0.1 to 4.0 wt. % of the entire amount of the lubricating oil.6. The sealed refrigerant compressor according to claim 1 , wherein ...

PISTON FOR COMPRESSOR

A piston for a compressor includes a bearing portion having a cylindrical shape to define a suction space into which refrigerant is accommodated therein, the bearing portion being provided with a bearing surface facing an inner circumferential surface of the cylinder, a head portion coupled to a front opening of the bearing portion and provided with a plurality of suction ports which communicate with the suction space, the head portion having a compression surface configured to face a compression space to compress the refrigerant in the compression space, and a flange portion coupled to a rear opening of the bearing portion and provided with a through-passage through which the refrigerant is introduced from a muffler unit to the suction space, the flange portion being coupled to a driving portion to transmit driving force to the piston. The bearing surface is subjected to a surface treatment to improve abrasion resistance. 1. A piston for a compressor , comprising:a bearing portion that defines a suction space configured to receive refrigerant, and that includes a bearing surface facing an inner circumferential surface of the cylinder;a head portion that is coupled to a first opening of the bearing portion and that defines a plurality of suction ports that fluidly communicate with the suction space, the head portion having a compression surface that faces a compression space and the head portion being configured to compress the refrigerant in the compression space; anda flange portion that is coupled to a second opening of the bearing portion and that defines a passage through which the refrigerant is introduced from a muffler to the suction space, the flange portion being coupled to a driver and configured to transmit a driving force from the driver to the piston, wherein the second opening of the bearing portion is disposed opposite to the first opening of the bearing portion,wherein the bearing surface is treated to improve abrasion resistance.2. The piston ...

ROTOR, MOTOR, FAN, COMPRESSOR, AND AIR CONDITIONING APPARATUS

A rotor includes a rotor core having a cylindrical outer circumferential surface around an axis line, the rotor core further having a first end and a second end that are both ends in a direction of the axis line, a first permanent magnet disposed in a region of the rotor core having the first end, and a second permanent magnet disposed in another region of the rotor core having the second end. The first permanent magnet is inclined so that a distance from the axis line to the first permanent magnet increases in a direction along the axis line toward the first end. The second permanent magnet is inclined so that a distance from the axis line to the second permanent magnet increases in a direction along the axis line toward the second end. 1. A rotor comprising:a rotor core having a cylindrical outer circumferential surface about an axis line, the rotor core further having a first end and a second end that are both ends in a direction of the axis line;a first permanent magnet disposed in a region of the rotor core having the first end; anda second permanent magnet disposed in another region of the rotor core having the second end,wherein the first permanent magnet is inclined so that a distance from the axis line to the first permanent magnet increases in a direction along the axis line toward the first end, andwherein the second permanent magnet is inclined so that a distance from the axis line to the second permanent magnet increases in a direction along the axis line toward the second end.2. The rotor according to claim 1 , wherein each of the first permanent magnet and the second permanent magnet is composed of a rare earth magnet containing neodymium claim 1 , iron claim 1 , boron claim 1 , and dysprosium claim 1 , or a ferrite sintered magnet containing iron oxide.3. The rotor according to claim 1 , wherein the first permanent magnet has a length in a circumferential direction of the rotor core that is shorter at a center part than at the first end of the rotor ...

MOUNTING STRUCTURE FOR CONNECTION TERMINAL, TURBO COMPRESSOR, AND TURBO REFRIGERATOR

A mounting structure for a main terminal for mounting the main terminal to a housing in the state of one end portion to which a lead wire can be affixed being inserted into the housing, and the other end portion being exposed to the outside of the housing, in which the housing has a mounting hole for inserting and extracting the one end portion together with the lead wire; and the main terminal has a flange portion that can mount the main terminal about the mounting hole from the outside of the housing without involving rotation of the main terminal. 1. A mounting structure for a connection terminal that mounts a connection terminal to a housing in the state of one end portion to which a lead wire can be affixed being inserted into the housing , and the other end portion being exposed to the outside of the housing , whereinthe housing has a mounting hole for inserting and extracting the one end portion together with the lead wire; andthe connection terminal has a flange portion that can mount the connection terminal about the mounting hole from the outside of the housing without involving rotation of the connection terminal.2. The mounting structure for a connection terminal according to further comprising an orientation adjusting member that adjusts the orientation of the connection terminal with respect to the mounting hole to a predetermined orientation.3. The mounting structure for a connection terminal according to claim 2 , wherein the orientation adjusting member has a mark that is formed on the flange portion corresponding to the orientation in which the lead wire is affixed to the one end portion.4. The mounting structure for a connection terminal according to claim 2 , wherein the orientation adjusting member has a fixing member that is provided in a non-equal interval in the circumferential direction of the flange portion.5. The mounting structure for a connection terminal according to claim 3 , wherein the orientation adjusting member has a fixing member ...

ROTARY COMPRESSOR AND REFRIGERATING CYCLE DEVICE

A rotary compressor has a blade which is provided in a cylinder so that reciprocating movement can be performed. The blade partitions a cylinder chamber into a suction chamber and a compression chamber by making a tip end portion of the blade contact the outer peripheral surface of a roller. The blade includes two blade members provided so as to be superimposed in an axial direction of a rotary shaft. Tip end portions of the two blade members are made to contact the outer peripheral surface of the roller. The two blade members are energized by a coil spring so that superimposed portions of the blade members are made in contact. 1. A rotary compressor compressing working fluid which houses an electric motor portion and a compression mechanism portion that is driven via a rotary shaft provided at the electric motor portion , in a hermetic case , the compression mechanism portion comprising:a cylinder having both ends covered with covering members and having a cylinder chamber inside;a roller which is fitted to the rotary shaft and rotates eccentrically in the cylinder chamber; anda blade which is provided in the cylinder so that reciprocating movement can be performed and partitions the cylinder chamber into a suction chamber and a compression chamber by making a tip end portion of the blade contact the outer peripheral surface of the roller, whereinthe blade includes two blade members are provided so as to be superimposed in an axial direction of the rotary shaft, tip end portions of the two blade members are made to contact the outer peripheral surface of the roller, and the two blade members are energized by a coil spring so that superimposed portions of the blade members are made in contact.2. The rotary compressor according to claim 1 , whereina rear end portion of each blade member is provided with a projecting portion, the projecting portion of each blade member is provided so as to be superimposed in the axial direction of the rotary shaft, the two projecting ...

CASCADING OIL DISTRIBUTION SYSTEM

A refrigeration system includes a plurality of compressors connected in series with each other. Each compressor has an oil sump located in a gravitational bottom of the compressor. A common supply line supplies refrigerant and oil to each of the plurality of compressors. The plurality of compressors includes a lead compressor and one or more non-lead compressors. The common supply line is configured to return more oil to the lead compressor than to the one or more non-lead compressors. Oil sump pressures for the plurality of compressors are maintained such that the lead compressor has the highest oil sump pressure, and the oil sump pressures of the non-lead compressors are successively lower with respect to its position downstream of the lead compressor. As a result, oil is distributed between adjacent compressors from the lead compressor, which is a most upstream compressor, sequentially downstream to the one or more non-lead compressors. 1. A refrigeration system comprising:a plurality of compressors connected in series with each other, each compressor having an oil sump located in a gravitational bottom of the compressor;a common supply line for supplying refrigerant and oil to each of the plurality of compressors;wherein the plurality of compressors includes a lead compressor and one or more non-lead compressors, and wherein the common supply line is configured to return more oil to the lead compressor than to the one or more non-lead compressors;wherein oil sump pressures for the plurality of compressors are maintained such that the lead compressor has the highest oil sump pressure, and the oil sump pressures of the non-lead compressors are successively lower with respect to its position downstream of the lead compressor, such that oil is distributed between adjacent compressors from the lead compressor, which is a most upstream compressor, sequentially downstream to the one or more non-lead compressors.2. The refrigeration system of claim 1 , wherein each of ...

MOTOR DRIVING DEVICE AND AIR CONDITIONER INCLUDING THE SAME

A motor driving device and an air conditioner including the same are disclosed. The disclosed motor driving device includes a multi-level converter to receive AC power, thereby outputting multi-level power, the multi-level converter including plural diodes and plural switching elements, plural capacitors for storing the multi-level power from the multi-level converter, and a gate drive signal generator to generate gate drive signals for the switching elements of the multi-level converter. The gate drive signal generator includes a gate drive power source to supply a gate drive voltage, a gate driver to generate the gate drive signals, using the gate drive voltage, a gate capacitor connected to both terminals of the gate driver, and a gate switching element connected between one end of the gate capacitor and one end of one of the plural capacitors. Accordingly, gate drive signals for the multi-level converter can be generated. 1. A motor driving device comprising:rectifier having a plurality of diodes coupled in at least one of serially or parallel;a plurality of transistors to control an operation of the plurality of diodes;a plurality of capacitors to store energy based an output of the rectifier; and a gate driver to generate gate drive signals based on a gate drive voltage,', 'a gate capacitor coupled to both terminals of the gate driver, and', 'a switch coupled between the gate capacitor and one of the plurality of capacitors., 'a gate signal generator to generate gate drive signals for the transistors, wherein the gate drive signal generator includes2. The motor driving device according to claim 1 , whereinwhen the switch is turned on, the gate capacitor is configured to store energy based on the gate drive voltage, andwhen the gate switching element is turned off, the gate driver generates the gate drive signals using the energy stored in the gate capacitor.3. The motor driving device according to claim 2 , wherein the switch is turned on when all of the ...

ELECTRIC MOTOR WITH EMBEDDED PERMANENT MAGNET, COMPRESSOR, AND REFRIGERATION/AIR-CONDITIONING DEVICE

In an interior permanent magnet motor, at least one magnetic pole center slit and a plurality of side slits are formed between a rotor outer peripheral surface of a rotor and a radially-outer insertion hole contour surface of a magnet insertion hole. The plurality of side slits are formed so that at least one side slit is formed on each of both sides of the magnetic pole center slit in a width direction. The area of the magnetic pole center slit is smaller than the area of each of the plurality of side slits. A width of each of the plurality of side slits is larger than an interval between the adjacent slits. 1. An interior permanent magnet motor , comprising:a stator; anda rotor rotatably arranged so as to be opposed to the stator,wherein the rotor comprises a rotor core having a plurality of magnet insertion holes formed therein, into which corresponding permanent magnets are respectively inserted,wherein at least one magnetic pole center slit and a plurality of side slits are formed between a rotor outer peripheral surface of the rotor and at radially-outer insertion hole contour surface of each of the magnet insertion holes,wherein the magnetic pole center slit is arranged at a corresponding magnetic pole center,wherein the plurality of side slits are formed so that at least one side slit is formed on each of both sides of the magnetic pole center slit in a width direction,wherein an area of the magnetic pole center slit is smaller than an area of each of the side slits, andwherein a width of each of the plurality of side slits is larger than an interval between the magnetic pole center slit and the side slit that are adjacent to each other, and is larger than an interval between the side slits that are adjacent to each other.2. An interior permanent magnet motor according to claim 1 , wherein a width of the magnetic pole center slit is smaller than a width of the each of the side slits.3. An interior permanent magnet motor according to claim 1 , wherein a ...

MOTOR-DRIVEN COMPRESSOR

There is provided a motor-driven compressor including a semiconductor device that comprises a compression mechanism, a motor, a housing, a wall, an electronic component, and a resin member. The motor drives the compression mechanism. The housing accommodates therein the compression mechanism and the motor. The wall extends from an outer surface of the housing so as to surround a part thereof and have an opened end and cooperates with the outer surface of the housing to form a casing. The electronic component is accommodated in the casing and includes a semiconductor module that includes a circuit board connected to the outer surface of the housing and a semiconductor element mounted to the circuit board. The resin member seals an entirety of the electronic component in the casing. 1. A motor-driven compressor including a semiconductor device , comprising:a compression mechanism;a motor driving the compression mechanism;a housing accommodating therein the compression mechanism and the motor;a wall extending from an outer surface of the housing so as to surround a part thereof and have an opened end, the wall cooperating with the outer surface of the housing to form a casing;an electronic component accommodated in the casing and including a semiconductor module, the semiconductor module including a circuit board connected to the outer surface of the housing and a semiconductor element mounted to the circuit board; anda resin member sealing an entirety of the electronic component in the casing.2. The motor-driven compressor according to claim 1 , wherein the circuit board has a stress reducing part for reducing stress of a connection between the circuit board and the semiconductor element and a connection between the circuit board and the housing.3. The motor-driven compressor according to claim 1 , wherein the circuit board is brazed to the housing. The present invention relates to a motor-driven compressor including a semiconductor device that drives a motor of the ...

ELECTRIC-MOTOR DRIVING DEVICE AND REFRIGERATION-CYCLE APPLICATION APPARATUS INCLUDING ELECTRIC-MOTOR DRIVING DEVICE

An electric-motor driving device includes an inverter connected to terminals connected to windings of an electric motor including the windings, the inverter applying an alternating-current voltage to the electric motor, a switching unit connected to the terminals and capable of switching a connection state between the terminals, a detecting unit that detects at least one of a voltage and an electric current of the inverter, and a control unit that determines on the basis of a detection value detected by the detecting unit that an abnormality occurs in the switching unit and controls the inverter to short-circuit at least two of the terminals. 1. An electric-motor driving device comprising:an inverter connected to terminals connected to windings of an electric motor including the windings, the inverter applying an alternating-current voltage to the electric motor;switching circuitry being capable of switching a connection state between the terminals, the switching circuitry being connected to the terminals;a detector to detect at least one of a voltage on an input side of the inverter and an electric current of the inverter; andprocessing circuitry to determine, on a basis of a detection value detected by the detector, that an abnormality occurs in the switching circuitry and control the inverter to short-circuit at least two of the terminals.2. The electric-motor driving device according to claim 1 , wherein claim 1 , when determining that an abnormality occurs in the switching circuitry claim 1 , processing circuitry controls the inverter to repeat short-circuit and release between the at least two of the terminals.3. The electric-motor driving device according to claim 1 , wherein the processing circuitry controls the inverter to short-circuit terminals between which a counterelectromotive voltage of the electric motor is largest among the terminals.4. The electric-motor driving device according to claim 1 , wherein a material of a switching element configuring ...

MOTOR DRIVER AND REFRIGERATION CYCLE EQUIPMENT

There are provided an inverter connected to n (n being as integer not less than 2) motors each including a rotor having a permanent magnet and capable of driving the n motors, and a connection switching device to switch a connection state of at least one motor of the n motors and the inverter between connection and disconnection. While the n motors are connected to the inverter and driven by the inverter, when an abnormality is detected in the at least one motor, the connection switching device switches the connection state to the disconnection and the inverter drives the n motors except the at least one motor. 1. A motor driver comprising:an inverter connected to n motors each including a rotor having a permanent magnet and capable of driving the n motors, n being an integer not less than 2; anda connection switching device to switch a connection state of at least one of the n motors and the inverter between connection and disconnection,wherein while the n motors are connected to the inverter and driven by the inverter, when an abnormality is detected in the at least one motor, the connection switching device switches the connection state to the disconnection and the inverter drives the n motors except the at least one motor, andwherein when the inverter drives the n motors except the at least one motor, the inverter increases a rotational frequency compared to when the inverter drives the n motors.2. (canceled)3. The motor driver of claim 1 , wherein the inverter allocates a rotational frequency at which the at least one motor was driven claim 1 , to the n motors except the at least one motor.4. The motor driver of claim 3 , wherein when a rotational frequency of the n motors except the at least one motor after the allocation of the rotational frequency at which the at least one motor was driven is greater than a maximum rotational frequency claim 3 , the inverter drives the n motors except the at least one motor at the maximum rotational frequency.5. The motor ...

SYSTEM AND METHOD FOR DYNAMICALLY DETERMINING REFRIGERANT FILM THICKNESS AND DYNAMICALLY CONTROLLING REFRIGERANT FILM THICKNESS AT ROLLING-ELEMENT BEARING OF AN OIL FREE CHILLER

Methods are directed towards dynamically determining refrigerant film thickness at the rolling-element bearing and for dynamically controlling refrigerant film thickness at the rolling-element bearing. Further, an oil free chiller system is configured for dynamically determining refrigerant film thickness at the rolling-element bearing of the oil free chiller system, wherein the oil free chiller system is also configured for dynamically controlling refrigerant film thickness at the rolling-element bearing of the oil free chiller system. 1. A computerized controller device for an oil free chiller configured for dynamically determining an actual refrigerant film thickness at a bearing of the oil free chiller during operation of the oil free chiller , and for controlling other components of the oil free chiller to change a refrigerant film thickness at the bearing or an operation of the oil free chiller , when the actual refrigerant film thickness is different from a threshold refrigerant film thickness.2. The computerized controller device as in claim 1 , wherein the computerized controller device controls the other components of the oil free chiller so that the change of the refrigerant film thickness at the bearing is an increase of the refrigerant film thickness claim 1 , when the actual refrigerant film thickness is below the threshold refrigerant film thickness.3. The computerized controller device as in claim 1 , wherein the threshold refrigerant film thickness is a predetermined minimum refrigerant film thickness.4. The computerized controller device as in any of the claim 1 , wherein the computerized controller device determines the actual refrigerant film thickness at the bearing of the oil free chiller during operation of the oil free chiller based only on temperature and rotation speed of the bearing.7. An oil free chiller system claim 1 , comprising the computerized controller device according to claim 1 , wherein the computerized controller device ...

EMBEDDED PERMANENT MAGNET TYPE ELECTRIC MOTOR, COMPRESSOR, AND REFRIGERATION AIR-CONDITIONING DEVICE

In an interior permanent magnet motor, a plurality of slits are formed between a rotor outer peripheral surface of a rotor and a radially-outer insertion hole contour surface of a magnet insertion hole. Assuming that a total area of the plurality of slits per magnetic pole is represented by Ss, and an area of a region in a rotor core on a radially outer side with respect to the corresponding one magnet insertion hole is represented by Si, the plurality of slits are formed so as to satisfy a relationship of 0.35≦Ss/Si≦0.5. 1. An interior permanent magnet motor , comprising:a stator, anda rotor rotatably arranged so as to be opposed to the stator,wherein the rotor comprises a rotor core having a plurality of magnet insertion holes formed therein, into which corresponding permanent magnets are respectively inserted,wherein the plurality of permanent magnets and the plurality of magnet insertion holes are each formed into an arc shape that is convex toward a center side of the rotor,wherein a plurality of slits are formed between a rotor outer peripheral surface of the rotor and a radially-outer insertion hole contour surface of each of the magnet insertion holes, andwherein, assuming that a total area of the plurality of slits per magnetic pole is represented by Ss, and an area of a region in the rotor core on a radially outer side with respect to corresponding one of the magnet insertion holes is represented by Si, the plurality of slits are formed so as to satisfy a relationship of 0.35≦Ss/Si≦0.5.2. An interior permanent magnet motor according to claim 1 ,wherein the plurality of slits comprise at least one magnetic pole center slit and a plurality of side slits, andwherein a width of the magnetic pole center slit is smaller than a width of each of the side slits.3. An interior permanent magnet motor according to claim 1 , wherein intervals of the plurality of slits are equal to each other.4. (canceled)5. A compressor claim 1 , comprising claim 1 , in an airtight ...

ENGINE DRIVEN HEAT PUMP

An engine driven heat pump includes a temperature switch that opens and closes in accordance with the peripheral temperature of an inverter and a control device that includes a signal reception unit, and a temperature open contact point that opens at a predetermined temperature or higher is provided in the temperature switch, and an abnormal-time open contact point that opens when abnormality occurs in a battery charging circuit is provided in the battery charging circuit, and a signal generation contact point that generates a state signal indicating a state of the inverter is provided in the inverter, and the temperature open contact of point the temperature switch, the abnormal-time open contact point of the battery charging circuit, and the signal generation contact point of the inverter are connected in series with respect to the signal reception unit of the control device. 1. An engine driven heat pump , comprising:an engine;a compressor configured to be driven by the engine;a refrigerant circuit configured to flow a refrigerant sucked and discharged by the compressor;a generator configured to be driven by the engine;an engine actuation battery configured to actuate the engine;a battery charging circuit configured to charge the engine actuation battery;an inverter configured to convert output power from the generator into a predetermined voltage and a predetermined frequency;a temperature switch configured to open and close in accordance with a peripheral temperature of the inverter; anda control device configured to include a signal reception unit,wherein a temperature open contact point configured to be opened at a predetermined temperature or higher is provided in the temperature switch, andwherein an abnormal-time open contact point configured to be opened when abnormality occurs in the battery charging circuit is provided in the battery charging circuit, andwherein a signal generation contact point configured to generate a state signal indicating a state ...

DC POWER-SUPPLY DEVICE AND REFRIGERATION-CYCLE APPLICATION DEVICE INCLUDING THE SAME

To provide a DC power-supply device that can suppress voltage unbalance of a plurality of capacitors serially connected between both terminals of a load, achieve stable drive of the load and long life of the capacitors, and contribute to high reliability, in a configuration in which an alternating current is converted into a direct current and is supplied to a load, and a refrigeration-cycle application device including the DC power-supply device. The DC power-supply device includes a rectifier circuit, a reactor connected to an input or an output side of the rectifier circuit, a first capacitor and a second capacitor serially connected between output terminals to a load, a charging unit that selectively charges one or both of the first capacitor and the second capacitor, and further includes a control unit that controls the charging unit so that voltage unbalance between the first capacitor and the second capacitor is suppressed. 1. A DC power-supply device that converts an alternating current into a direct current and supplies the direct current to a load , comprising:a rectifier circuit to rectify the alternating current;a reactor connected to an input side or an output side of the rectifier circuit;a first capacitor and a second capacitor serially connected between output terminals to the load;a charging unit to selectively charge one or both of the first capacitor and the second capacitor; anda control unit to control the charging unit, whereinthe control unit controls at least one of a charging period of the first capacitor and a charging period of the second capacitor, andby changing at least of one of the charging period of the first capacitor and the charging period of the second capacitor with respect to a voltage difference between the first capacitor and the second capacitor at a first time, a voltage difference between the first capacitor and the second capacitor at a second time, which is after the first time, is made small.2. The DC power-supply ...

AIR CONDITIONER

An air conditioner includes: a power generating unit that generates drive power for driving the air conditioner; an output unit that drives a motor; a detecting unit that detects a DC voltage applied to the output unit; a motor drive control unit that controls the output unit based on a detection result from the detecting unit; a drive power supply unit that supplies an operating power source to the output unit and the motor drive control unit; a main body control unit that outputs a motor drive command or a motor drive stop command to the supply unit; a power circuit unit that supplies operating power to the main body control unit and the supply unit; and an input changeover switch that inputs the detection result to the motor drive control unit as the motor is driven, and cuts off input of the detection result as the motor stops. 1. An air conditioner to receive supply of AC power from a commercial power source and drive a motor , the air conditioner comprising:a power generating unit to convert an AC voltage applied from the commercial power source into a DC voltage to generate drive power for driving the air conditioner;an inverter output unit to drive the motor by using power supplied from the power generating unit;a voltage detecting unit to detect a DC voltage applied to the inverter output unit;a motor drive control unit to control the inverter output unit on a basis of a detection result from the voltage detecting unit;a drive power supply unit to supply an operating power source to each of the inverter output unit and the motor drive control unit;a main body control unit to transmit and receive signals to and from the motor drive control unit, and output a motor drive command or a motor drive stop command to the drive power supply unit;a power circuit unit to supply operating power to the main body control unit and the drive power supply unit by using the drive power generated by the power generating unit; anda detection result inhibiting circuit to input ...

TRANSPORT REFRIGERATION UNIT WITH ENGINE HEAT FOR DEFROSTING

A transport refrigeration unit is provided and includes a compressor, a condenser, an expansion valve, an evaporator, piping fluidly coupling the compressor and the condenser, a fluid loop to produce heated fluid from an engine, which is configured to drive operations of the compressor, a heat exchanger disposed in the refrigeration cycle such that the heated fluid thermally interacts with refrigerant of the refrigeration cycle and a hot gas bypass valve to control a quantity of refrigerant removed from the piping. 1. A transport refrigeration unit , comprising:a compressor;a condenser;an expansion valve;an evaporator;piping fluidly coupling the compressor and the condenser;a fluid loop to produce heated fluid from an engine, the engine configured to drive operations of the compressor;a heat exchanger disposed in the refrigeration cycle such that the heated fluid thermally interacts with refrigerant of the refrigeration cycle; anda hot gas bypass valve to control a quantity of the refrigerant removed from the piping.2. The transport refrigeration unit according to claim 1 , wherein:the heat exchanger is between the evaporator and the compressor and disposed along the fluid loop, andthe hot gas bypass valve controls bypass flows of the refrigerant between the piping and second piping between the expansion valve and the evaporator.3. The transport refrigeration unit according to claim 1 , wherein:the heat exchanger is between the condenser and the expansion valve and disposed along the fluid loop, andthe hot gas bypass valve controls bypass flows of the refrigerant between the piping and second piping between the condenser and the heat exchanger.4. The transport refrigeration unit according to claim 1 , further comprising a controller configured to operate the hot gas bypass valve.5. The transport refrigeration unit according to claim 1 , wherein the condenser comprises an outer diameter coil.6. The transport refrigeration unit according to claim 1 , further ...

ECONOMIZER CONTROL SYSTEMS AND METHODS

An economizer control system includes a compressor including a compression area, a piston chamber, and an economizer inlet configured to receive economizer vapor into the compression area via a flow path that extends between the economizer inlet and the compression area. At least a portion of the flow path traverses the piston chamber. The economizer control system also includes a piston disposed within the piston chamber and configured to contact the economizer vapor. The piston is moveable between an open position that opens the flow path and a closed position that closes the flow path. Additionally, the economizer control system includes a biasing system configured to apply force to the piston to bias the piston toward the closed position. 1. An economizer control system for a vapor compression system , comprising:a compressor including a compression area, a piston chamber, and an economizer inlet configured to receive economizer vapor into the compression area via a flow path that extends between the economizer inlet and the compression area, wherein at least a portion of the flow path traverses the piston chamber;a piston disposed within the piston chamber and configured to contact the economizer vapor, wherein the piston is moveable between an open position that opens the flow path and a closed position that closes the flow path; anda biasing system configured to apply force to the piston to bias the piston toward the closed position.2. The economizer control system of claim 1 , wherein the biasing system is configured to transition the piston to the open position in response to the economizer vapor having at least a threshold pressure.3. The economizer control system of claim 1 , wherein the flow path comprises:a channel having a first end defined by the economizer inlet and a second end defined by the piston chamber; anda passageway having a third end defined by the piston chamber and a fourth end defined by the compression area, wherein the piston in the ...

Permanent Magnet Motor, Refrigeration Compressor and Air Conditioning Unit

A stator and a rotor are mounted inside a case of the permanent magnet motor, and separate the inner cavity of the case into a first inner cavity and a second inner cavity. Axial ventilation holes in communication with the first inner cavity and with the second inner cavity, are disposed in teeth of a stator core of the stator, and each axial ventilation hole is a taper hole extending in a height direction of each tooth. The width of one end of the axial ventilation hole, which is close to a head of the tooth, is greater than the width of the other end of the axial ventilation hole, which is close to a root of the tooth. The taper holes enable fluid to fully carry out exchange heat at the teeth where heat is generated most intensively. 1. A permanent magnet motor , comprising a case , a stator and a rotor; the stator and the rotor are installed in the case , and separate an inner cavity of the case into a first inner cavity and a second inner cavity; the stator comprises a stator core , axial ventilation holes in communication with the first inner cavity and with the second inner cavity are disposed in teeth of the stator core; wherein , each axial ventilation hole is a taper hole extending in a height direction of each tooth; width of one end of the axial ventilation hole , which is close to a head of the tooth , is greater than width of the other end of the axial ventilation hole , which is close to a root of the tooth.2. The permanent magnet motor according to claim 1 , wherein claim 1 , contour lines of a cross-section of the axial ventilation hole comprises a first contour line claim 1 , which is arc-shaped and close to the head of the tooth claim 1 , and a second contour line claim 1 , which is arc-shaped and close to the root of the tooth claim 1 , and third contour lines claim 1 , which are straight line-shaped and each of which is connected with the first contour line at one end and connected with the second contour line at the other end.312. The permanent ...

LINEAR COMPRESSOR

A linear compressor includes a hole that is defined in a discharge cover, and is configured such that a portion of a refrigerant discharged through an opened discharge valve is guided to flow to the hole. Accordingly, a discharge passage for the refrigerant used as a gas bearing may be easily defined. 1. A linear compressor comprising:a discharge cover that supports a discharge valve;a cover housing that receives the discharge cover and that defines a housing chamber;a frame that is coupled to the cover housing;a cylinder that is inserted into the frame and that receives a piston, wherein the piston is configured to reciprocate in the cylinder in an axial direction;a nozzle that is disposed at the cylinder and that is configured to introduce, into the cylinder, refrigerant that is discharged through the discharge valve; anda bearing sealer that is disposed at an interface between the frame and the cover housing and that defines a passage for the refrigerant that is transferred to the nozzle.2. The linear compressor according to claim 1 , wherein the discharge cover comprises a cover hole that is defined at the bearing sealer and that is configured to enable discharge of the refrigerant from the housing chamber.3. The linear compressor according to claim 2 , wherein the discharge cover comprises:a cover body; anda cover flange that is connected to the cover body and that extends in a radial direction, andwherein the cover hole is defined at the cover flange.4. The linear compressor according to claim 3 , wherein the bearing sealer is disposed to contact the cover flange.5. The linear compressor according to claim 3 , wherein the discharge cover further comprises:a stepped portion that extends from the cover flange in an axial direction; anda seating portion that extends from the stepped portion in the radial direction and that receives a spring assembly that is coupled to the discharge valve,wherein a first bracket sealing member is disposed between the spring ...

REFRIGERATION CYCLE APPARATUS

A refrigeration cycle apparatus includes a refrigerant and a refrigeration cycle circuit. The refrigeration cycle circuit includes a compressor, and causes the refrigerant to circulate therethrough. The refrigerant is HFO-based refrigerant alone or a mixed refrigerant. In the mixed refrigerant, a mixing ratio of HFO-based refrigerant is equal to or more than 10% by weight. The compressor includes a motor. The motor includes a portion formed from a resin component. The resin component is made of PET, PA, or the like. 1. A refrigeration cycle apparatus comprising:a refrigerant; anda refrigeration cycle circuit including a compressor, the refrigeration cycle circuit being configured to cause the refrigerant to circulate therethrough,whereinthe refrigerant is an HFO-based refrigerant alone or a mixed refrigerant in which a mixing ratio of an HFO-based refrigerant is equal to or more than 10% by weight,the compressor includes a motor,the motor includes a portion formed from a first resin component, andthe first resin component comprises at least one ofPET (polyethylene terephthalate),PA (polyamide),LCP (liquid crystal polymer),PBT (polyethylene terephthalate),phenol resin,melamine resin,PEEK (polyether ether ketone),PTFE (polytetrafluoroethylene),PAI (polyamideimide),PPS (polyphenylene sulfide), andPEN (polyethylene naphthalate).2. The refrigeration cycle apparatus according to claim 1 , whereina ratio of the first resin component to the refrigerant is equal to or more than 1.5% by weight.3. The refrigeration cycle apparatus according to claim 1 , further comprising:a refrigerating machine oil retained in the compressor; andan acid scavenger added to the refrigerating machine oil,whereina ratio of the acid scavenger to the refrigerant is equal to or less than 1.6% by weight.4. The refrigeration cycle apparatus according to claim 1 , whereinthe first resin component is used to form at least one portion of the motor selected from an insulator, an insulating sleeve, a ...

Electric motor and compressor having the same

The present disclosure relates to an electric motor, and a compressor having the same. The electric motor includes a stator, and a rotor. The rotor includes a rotation shaft, a rotor core, and a plurality of permanent magnets. The rotor core includes permanent magnet insertion portions each formed therethrough in an axial direction so that the permanent magnet is inserted, and slots each formed through the rotor core in a manner that a core area of a front portion of a d-axis is smaller than a core area of a rear portion of the d-axis in a rotating direction of the rotor when an outer core part of the permanent magnet insertion portion is divided with respect to the d-axis. Accordingly, a decrease in inertia can be suppressed and an occurrence of vibration and noise due to Magnetic Pull Force (MPF) can be prevented.

COOLING APPARATUS AND COMPRESSOR

A cooling apparatus includes a compressor; a condenser for condensing a refrigerant discharged from the compressor, an expansion valve to expand the refrigerant discharged from the condenser, and an evaporator to evaporate the refrigerant discharged from the expansion valve and to deliver the refrigerant to the compressor. The compressor includes a rotary compressor having a displacement volume less than about 3 cc, and refrigerant circulating inside the cooling apparatus includes at least one of R290, R600a, R123a, R1234yf, and R1234ze. The cooling apparatus and compressor attain miniaturization and high efficiency. 1. A cooling apparatus comprising:a compressor;a condenser for condensing a refrigerant discharged from the compressor;an expansion device for expanding the refrigerant discharged from the condenser; andan evaporator for evaporating the refrigerant discharged from the expansion device and delivering the refrigerant to the compressor,wherein the compressor comprises a rotary compressor having a displacement volume less than about 3 cc, andwherein the refrigerant circulating inside the cooling apparatus includes at least one of R290, R600a, R123a, R1234yf, and R1234ze.2. The cooling apparatus of claim 1 , wherein cooling performance of the cooling apparatus is less than about 2 kW.3. The cooling apparatus of claim 1 , wherein the compressor claim 1 , the condenser claim 1 , the expansion device claim 1 , and the evaporator are connected by pipes claim 1 ,wherein the pipes comprise liquid-side pipes that connect the evaporator and the compressor, and the compressor and the condenser, and gas-side pipes that connect the condenser and the expansion device, and the expansion device and the evaporator,wherein an internal diameter of the liquid-side pipes is less than about 4.2 mm, andwherein an internal diameter of the gas-side pipes is less than about 6.5 mm.4. The cooling apparatus of claim 1 , wherein the condenser and the evaporator comprise heat transfer ...

TRANS-CHLORO-3,3,3-TRIFLUOROPROPENE FOR USE IN CHILLER APPLICATIONS

The present invention relates to refrigerant compositions containing trans-chloro-3,3,3-trifluoropropene (1233zd(E)) useful for chiller applications and processes using 1233zd(E). 1. A method for producing refrigeration comprising compressing a refrigerant composition comprising 1233zd(E) , wherein said compressing occurs within a centrifugal chiller system.2. The method of wherein said compressing is performed in multiple stages.3. The method of wherein the compressing step comprises from about two to about five stages of compression.4. The method of wherein the COP is between 4.7 and 4.96.5. The method of wherein the refrigerant composition comprises at least 50 wt % 1233zd(E) based on total weight of the composition.6. The method of wherein the refrigerant composition comprises at least 70 wt % 1233zd(E) based on total weight of the composition.7. The method of wherein said refrigerant composition comprises a hydrofluoroolefin consisting essentially of 1233zd claim 1 , wherein a majority of said 1233zd is 1233zd(E).8. The method of wherein said 1233zd consists of 1233zd(E) and 1233zd(Z) in a ratio of about 2:1 to about 99:1.9. The method of wherein said ratio is about 4:1 to about 19:1.10. A method for producing refrigeration comprising compressing a refrigerant comprising at least 50 wt % of 1233zd(E) in a chiller and thereafter evaporating the refrigerant in the vicinity of a body to be cooled.11. The method of wherein said refrigerant consists essentially of 1233zd(E).12. A centrifugal chiller system comprising:a. a centrifugal compressor; andb. a refrigerant comprising 1233zd(E), wherein said refrigerant is disposed within said centrifugal compressor.13. The centrifugal chiller system of wherein said centrifugal compressor comprises multiple compression stages.14. The centrifugal chiller system of wherein the refrigerant composition comprises at least 50 wt % 1233zd(E) based on total weight of the composition.15. The centrifugal chiller system of wherein the ...

ELECTRIC COMPRESSOR

Provided is an electric compressor which includes a motor which rotates a rotary shaft of a impeller; a housing which accommodates the motor; a plate attached to the housing mounted with a control circuit configured to drive and control the motor; and a refrigerant flow passage provided between the housing and the plate. At least a part of the refrigerant flow passage is formed by a heat radiation fin provided on at least one of the housing and the plate. 16.-. (canceled)7. An electric compressor comprising:a motor which rotates a rotary shaft of an impeller;a housing which accommodates the motor;a plate attached to the housing and mounted with a control circuit configured to drive and control the motor; anda refrigerant flow passage provided between the housing and the plate,wherein at least a part of the refrigerant flow passage is formed by a heat radiation fin provided on at least one of the housing and the plate.8. The electric compressor according to claim 7 , wherein the heat radiation fin is provided on both the housing and the plate.9. The electric compressor according to claim 8 , wherein the heat radiation fin provided on the housing side and the heat radiation fin provided on the plate side are alternately arranged.10. The electric compressor according to claim 7 , further comprising:a pair of bearings disposed to sandwich the motor therebetween and supporting the rotary shaft,wherein the housing includes a partition wall between one bearing on the side closer to the plate among the pair of bearings and the plate, anda bearing support portion which supports the one bearing is provided inside the partition wall, and the refrigerant flow passage is provided outside the partition wall facing the bearing support portion.11. The electric compressor according to claim 7 , wherein the refrigerant flow passage is a one-pass meandering flow passage having a folded portion claim 7 , andthe folded portion is bent.12. The electric compressor according to claim 7 , ...

Reciprocating Refrigeration Compressor Wrist Pin Retention

A compressor ( 20 ) has a case ( 22 ) and a crankshaft ( 38 ). The case has a number of cylinders ( 30 32 ). For each of the cylinders, the compressor includes a piston ( 34 ) mounted for reciprocal movement at least partially within the cylinder. A connecting rod ( 36 ) couples each piston to the crankshaft. A pin ( 44 ) couples each connecting rod to the associated piston. Each pin has first ( 52 ) and second ( 53 ) end portions mounted to first ( 56 ) and second ( 57 ) receiving portions of the associated piston and a central portion ( 48 ) engaging the associated connecting rod. For each of the pistons a pair of first and second at least partially non metallic plugs have respective stems received in the pin first and second end portions and respective heads facing a wall surface of the associated cylinder.

COMPRESSOR DRIVE SYSTEM AND METHOD

A compressor drive system includes a power supply fixed to the vehicle, an electric motor electrically coupled to the power supply and mechanically coupled to the compressor for driving the compressor, and a controller communicably coupled to the vehicle for operating the electric motor when the compressor drive is turned on. The compressor drive system may be useful for providing an alternate source for powering the compressor of a vehicle air-conditioner system that does not reduce vehicle shaft horsepower nor directly mechanically connect to the vehicle engine power take off. 1. A compressor drive system for a vehicle , the vehicle including an air-conditioner having a compressor , the compressor drive system comprising:a power supply fixed to the vehicle;an electric motor electrically coupled to the power supply and mechanically coupled to the compressor, the electric motor configured to drive the compressor; anda controller communicably coupled to the vehicle, and configured to operate the electric motor when the compressor drive system is turned on.2. The compressor drive system of claim 1 , wherein the power supply fixed to the vehicle is a vehicle battery.3. The compressor drive system of claim 2 , further comprising a heat exchanger claim 2 , said heat exchanger configure to cool the electric motor; andwherein the power supply fixed to the vehicle is a vehicle battery;wherein the vehicle includes a vehicle chassis;wherein the compressor and the electric motor are mounted to the vehicle chassis;wherein the compressor includes a drive clutch configured to drivingly decouple the electric motor from the compressor; andwherein the heat exchanger includes a finned radiator.4. The compressor drive system of claim 1 , wherein the power supply fixed to the vehicle is an auxiliary battery claim 1 , the auxiliary battery being independent from a vehicle battery of the vehicle.5. The compressor drive system of claim 4 , wherein the auxiliary battery is selectably ...

Heat pump having a cooling device for cooling a guide space or a suction mouth

A heat pump, having: an evaporator for evaporating a working liquid; a liquefier for condensing a compressed working vapor; a compressor motor with a suction mouth having attached thereto a radial impeller to convey a working vapor evaporated in the evaporator through the suction mouth; a guide space arranged to guide a working vapor conveyed by the radial impeller into the condenser; and a cooling device for cooling the guide space or the suction mouth with a liquid, wherein the cooling device is configured to guide the liquid onto an outside of the guide space or of the suction mouth, wherein the outside is not in contact with the working vapor, and wherein an inside of the guide space or of the suction mouth is in contact with the working vapor.

METHOD OF MANAGING COMPRESSOR START FOR TRANSPORT REFRIGERATION SYSTEM

A method of managing a compressor start operation, the method comprising controlling a valve disposed upstream of a compressor to lower a saturated suction temperature of a refrigerant to be below an ambient temperature while starting the compressor. 1. A method of managing a compressor start operation , the method comprising controlling a valve disposed upstream of a compressor to lower a saturated suction temperature of a refrigerant to be below an ambient temperature while starting the compressor.2. The method of claim 1 , wherein the valve is a suction modulation valve.3. The method of claim 1 , wherein the valve is an electronic evaporator expansion valve.4. The method of claim 1 , wherein the saturated suction temperature of the refrigerant is lowered to be at least 30 degrees Fahrenheit below the ambient temperature.5. The method of claim 1 , wherein the saturated suction temperature of the refrigerant is lowered by adjusting a pressure of the refrigerant with the valve.6. A method of managing a compressor start operation for a transport refrigeration unit claim 1 , the method comprising:determining an ambient temperature surrounding a compressor;starting the compressor; andactively controlling a valve disposed within a refrigerant line and upstream of the compressor, wherein actively controlling the valve adjusts the pressure of the refrigerant to lower the saturated suction temperature of the refrigerant to be below the ambient temperature by a threshold temperature difference.7. The method of claim 6 , wherein the valve is a suction modulation valve.8. The method of claim 6 , wherein the valve is an electronic evaporator expansion valve.9. The method of claim 6 , wherein the threshold temperature difference is at least 30 degrees Fahrenheit.10. The method of claim 6 , wherein the method is performed when the ambient temperature is below a threshold ambient temperature.11. The method of claim 10 , wherein the threshold ambient temperature is equal to or ...

COMPRESSOR

In a compressor for refrigerant having a suction inlet for refrigerant and a pressure outlet for compressed refrigerant, said compressor comprising a compression unit and an electric motor driving said compression unit, said electric motor being a synchronous reluctance motor having a stator and a rotor, said rotor comprising a plurality of stacked disc elements, each disc element having a plurality of flux barriers configured to give the rotor core an anisotropic magnetic structure and formed as apertures in said disc element, it is provided that said flux barriers are arranged in said rotor core to define channels enabling a flow of refrigerant through said rotor core, said rotor is provided with a first support element acting on a first front side of said rotor core and a second support element acting on a second front side of said rotor core, said support elements being provided with cut-out sections and said cut-out sections being designed to uncover at least 70% of the cross section of apertures defined by said flux barriers in the respective disc element forming the respective front side of said rotor core. 1. Compressor for refrigerant having a suction inlet for refrigerant and a pressure outlet for compressed refrigerant , said compressor comprising a compression unit and an electric motor driving said compression unit , said electric motor being a synchronous reluctance motor having a stator and a rotor , said rotor comprising a plurality of stacked disc elements , said disc elements forming a rotor core each disc element having a plurality of flux barriers configured to give the rotor core an anisotropic magnetic structure and formed as apertures in said disc element , said flux barriers are arranged in said rotor core to define channels enabling a flow of refrigerant through said rotor core , said rotor is provided with a first support element acting on a first front side of said rotor core and a second support element acting on a second front side of ...

INVERTER DEVICE AND OUTDOOR UNIT OF HEAT PUMP DEVICE

An inverter device converts DC to AC and supplies power to a load (motor), and includes a temperature sensor that directly or indirectly detects a temperature of the inverter device; a DC link including a smoothing capacitor; an inverter circuit provided between the DC link and the load (motor); and a control unit that controls the inverter circuit. The control unit forcefully passes a current through the DC link when an instruction to allow the inverter circuit to operate is not received and when the temperature detected by the temperature sensor is less than or equal to a predetermined temperature. 112. An inverter device that converts DC to AC and supplies power to a load () , the inverter device comprising:{'b': '6', 'a temperature sensor () that directly or indirectly detects a temperature of the inverter device;'}{'b': 10', '7, 'a DC link () including a smoothing capacitor ();'}{'b': 42', '10', '12, 'an inverter circuit () provided between the DC link () and the load (); and'}{'b': 5', '42', '5', '10', '42', '6, 'a control unit () that controls the inverter circuit (), the control unit () being configured to forcefully pass a current through the DC link () when an instruction to allow the inverter circuit () to operate is not received and when the temperature detected by the temperature sensor () is less than or equal to a predetermined temperature.'}210542. The inverter device according to claim 1 , wherein after forcefully passing a current through the DC link () claim 1 , the control unit () allows the inverter circuit () to perform heating operation claim 1 , and stops the heating operation when the temperature reaches the predetermined temperature.31254212. The inverter device according to claim 2 , wherein the load is a motor () claim 2 , and the heating operation is performed by the control unit () causing switching loss in the inverter circuit () by allowing a pulse current to repeatedly and alternately flow through a coil of the motor () in one ...

COMPRESSOR AND CHILLER SYSTEM HAVING THE SAME

A compressor according to an embodiment of the present disclosure includes: one or more impellers configured to draw in a refrigerant in an axial direction and to compress the refrigerant in a centrifugal direction; a rotating shaft, to which the impellers and a motor rotating the impellers are coupled; a thrust bearing supporting the rotating shaft; a bearing state sensor configured to detect surface roughness of the thrust bearing; and a controller configured to control the motor based on the surface roughness of the thrust bearing. 1. A compressor comprising:one or more impellers configured to draw in a refrigerant in an axial direction and to compress the refrigerant in a centrifugal direction;a rotating shaft, to which the impellers and a motor rotating the impellers are coupled;a thrust bearing supporting the rotating shaft;a bearing state sensor configured to detect surface roughness of the thrust bearing; anda controller configured to control the motor based on the surface roughness of the thrust bearing.2. The compressor of claim 1 , wherein in response to a surface roughness value of the thrust bearing exceeding a first reference roughness value claim 1 , the controller sets an RPM of the motor to be less than a normal RPM.3. The compressor of claim 1 , wherein in response to a surface roughness value of the thrust bearing exceeding a second reference roughness value claim 1 , the controller controls the motor to stop.4. The compressor of claim 2 , further comprising an output unit configured to transmit visual or audio information to a user claim 2 ,wherein in response to a surface roughness value of the thrust bearing exceeding the first reference roughness value, the controller controls the output unit to output a warning.5. The compressor of claim 2 , further comprising an output unit configured to transmit visual or audio information to a user claim 2 ,wherein in response to a surface roughness value of the thrust bearing exceeding the first reference ...

AIR CONDITIONER

An air conditioner includes: a power generating unit that generates drive power for driving the air conditioner; an output unit that drives a motor; a detecting unit that detects a DC voltage applied to the output unit; a motor drive control unit that controls the output unit based on a detection result from the detecting unit; a drive power supply unit that supplies an operating power source to the output unit and the motor drive control unit; a main body control unit that outputs a motor drive command or a motor drive stop command to the supply unit; a power circuit unit that supplies operating power to the main body control unit and the supply unit; and an input changeover switch that inputs the detection result to the motor drive control unit as the motor is driven, and cuts off input of the detection result as the motor stops. 1. An air conditioner to receive supply of AC power from a commercial power source and drive a motor , the air conditioner comprising:a power generating unit to convert an AC voltage applied from the commercial power source into a DC voltage to generate drive power for driving the air conditioner;an inverter output unit to drive the motor by using power supplied from the power generating unit;a voltage detecting unit to detect a DC voltage applied to the inverter output unit;a motor drive control unit to control the inverter output unit on a basis of the DC voltage detected by the voltage detecting unit;a drive power supply unit to supply an operating power source to each of the inverter output unit and the motor drive control unit;a main body control unit to transmit and receive signals to and from the motor drive control unit, and output a motor drive command or a motor drive stop command to the drive power supply unit;a power circuit unit to supply operating power to the main body control unit and the drive power supply unit by using the drive power generated by the power generating unit; anda detection result inhibiting circuit to ...

DIRECT-CURRENT POWER SUPPLY DEVICE, MOTOR DRIVING DEVICE, AIR CONDITIONER, AND REFRIGERATOR

A direct-current power supply device includes a rectifier connected to a power supply, a charge storage unit configured by a first capacitor and a second capacitor connected in series, a switching unit configured by a first switching element and a second switching element connected in series and backflow preventing elements that suppress a backflow of electric charges from the charge storage unit, a reactor, a control unit that controls operations of the first switching element and the second switching element, and a direct-current-voltage detecting unit that detects a first both-end voltage, which is a voltage across the first capacitor, and a second both-end voltage, which is a voltage across the second capacitor. The control unit detects, on the basis of a voltage difference between the first both-end voltage and the second both-end voltage, a short-circuit failure of one of the first switching element and the second switching element. 1. A direct-current power supply device comprising:a rectifier connected to an alternating-current power supply;a charge storage unit including a first capacitor and a second capacitor connected in series;a switching unit including a first switching element and a second switching element connected in series and backflow preventing elements that suppress a backflow of electric charges from the charge storage unit;a control unit that controls operations of the first switching element and the second switching element; anda direct-current-voltage detecting unit that detects a first both-end voltage, which is a voltage across the first capacitor, and a second both-end voltage, which is a voltage across the second capacitor, whereinthe control unit detects, on the basis of a voltage difference between the first both-end voltage and the second both-end voltage, a short-circuit failure of one of the first switching element and the second switching element.2. The direct-current power supply device according to claim 1 , further comprising a ...

POWER CONVERTING APPARATUS AND HEAT PUMP DEVICE

A power converting apparatus includes: an inverter converting a direct-current voltage supplied from a power supply unit into an alternating-current voltage and outputting the alternating-current voltage to a motor; and an inverter control unit outputting synchronous PWM (Pulse Width Modulation) signals for driving switching elements of the inverter. A frequency of the synchronous PWM signals is periodically varied when periodic pulsation occurs in a load connected to the motor. 1. A power converting apparatus comprising:an inverter converting a direct-current voltage supplied from a power supply unit into an alternating-current voltage and outputting the alternating-current voltage to a motor; andan inverter control unit outputting a synchronous PWM (Pulse Width Modulation) signal for driving a switching element of the inverter, whereina frequency of the synchronous PWM signal is-periodically varied varies with a change in a rotor position of the motor when periodic pulsation occurs in a load connected to the motor.2. The power converting apparatus according to claim 1 , wherein the frequency of the synchronous PWM signal is periodically varied on a basis of a rotor rotation position of the motor when periodic pulsation occurs in the load connected to the motor.3. The power converting apparatus according to claim 1 , wherein the frequency of the synchronous PWM signal is periodically varied on a basis of an electric current flowing to the motor when periodic pulsation occurs in the load connected to the motor.4. A heat pump device comprising the power converting apparatus according to any one of to .5. A heat pump device comprising the power converting apparatus according to .6. A heat pump device comprising the power converting apparatus according to . This application is a U.S. national stage application of International Patent Application No. PCT/JP2015/075211 filed on Sep. 4, 2015, the disclosure of which is incorporated herein by reference.The present ...

Pressure Pulsation Traps

A pressure pulsation trap is provided. The pressure pulsation trap includes a channel extending from an inlet to an outlet, and a plurality of branches extending from the channel, each of the branches having different lengths than one another. The different lengths are configured such that the branches attenuate noise and/or vibration over a range of operating frequencies. 1. A pressure pulsation trap , comprising:a channel extending from an inlet to an outlet; anda plurality of branches extending from the channel, each of the branches having different lengths than one another, wherein the different lengths are configured such that the plurality of branches attenuate noise and/or vibration over a range of operating frequencies.2. The pressure pulsation trap of claim 1 , wherein the channel is configured to split a flow of refrigerant received from the inlet into a plurality of flow paths defined by the plurality of branches claim 1 , respectively.3. The pressure pulsation trap of claim 2 , wherein each branch comprises a length that is substantially a quarter of a wavelength of a pressure pulsation in the refrigerant flowing into each respective flow path.4. The pressure pulsation trap of claim 2 , wherein each branch selected from the plurality of branches is configured to attenuate noise and/or vibration over the range of operating frequencies by trapping a plurality of standing waves generated in each of the plurality of flow paths claim 2 , respectively claim 2 , each of the plurality of standing waves including a standing wave having a base frequency and at least one other standing wave having a higher frequency that is an integer-multiple of the base frequency.6. The pressure pulsation trap of claim 1 , wherein the plurality of branches are tubular claim 1 , wherein at least one branch selected from the plurality of branches comprises a bend or curve claim 1 , and wherein the bend or curve is such that the at least one branch defines a first flow path this is ...

HEAT PUMP DEVICE, AND AIR CONDITIONER, HEAT PUMP WATER HEATER, REFRIGERATOR AND FREEZING MACHINE INCLUDING HEAT PUMP DEVICE

A heat pump device includes an inverter control unit for controlling an inverter. The inverter control unit includes a constraint-energization control unit that, during operation standby of a compressor, determines whether heating to the compressor is necessary, on the basis of a coolant sleeping amount in the compressor, and, when having determined that heating to the compressor is necessary, selects, according to the coolant sleeping amount, any one of direct-current energization for supplying a direct-current voltage to the motor and high-frequency energization for supplying a high-frequency voltage having a frequency higher than a frequency during a normal operation to the motor, so as to output a constraint energization command for carrying out constraint energization of the motor; and a driving-signal generating unit that generates a driving signal on the basis of the constraint energization command. 1. A heat pump device comprising:a compressor including a compression mechanism that compresses a coolant and a motor that drives the compression mechanism;a heat exchanger;an inverter that applies a predetermined voltage to the motor; andan inverter control unit that generates a driving signal for driving the inverter, 'an energization control unit that, during operation standby of the compressor, carries out energization to the motor by using at least one of a direct current and a high frequency and heats a coolant in the compressor.', 'wherein the inverter control unit includes2. The heat pump device according to claim 1 , wherein the energization control unit includes:a coolant-sleeping-amount output unit that estimates or detects and outputs a coolant sleeping amount to the compressor;a heating-amount calculating unit that calculates a heating amount corresponding to the coolant sleeping amount; andan energization-switching determining unit that switches, on the basis of a first temperature around the compressor and a second temperature of the compressor ...

Sealed compressor and refrigerator including sealed compressor

A sealed compressor ( 100 ) comprises an electric component ( 110 ), a compression component ( 112 ), and a sealed container ( 102 ), the compression component includes a shaft ( 118 ), a cylinder block ( 124 ), a piston ( 130 ), and a ball bearing ( 176 ), the ball bearing includes a cage ( 168 ), a plurality of rolling elements ( 166 ); a first race ( 164 ), a second race ( 170 ), and a support member ( 172 ), and when a mass of a shaft assembly ( 118 a ) including the rotor ( 116 ) and the shaft is M, a spring constant of the support member is K, and a maximum rotational frequency of the shaft assembly is F, a relationship of F<1/4π)*(K/M) − 0.5 is satisfied.

Stator, motor, compressor, and refrigerating and air-conditioning apparatus

A stator includes a winding and a plurality of split core parts arranged annularly in a circumferential direction around an axis line. Each of the plurality of split core parts includes a yoke part, a tooth part, a connection part including a curved surface, and a first insulator provided on an end part of the tooth part. The first insulator includes a first protruding part protruding beyond the curved surface.

PERMANENT MAGNET-EMBEDDED ELECTRICAL MOTOR, COMPRESSOR, AND REFRIGERATING AIR CONDITIONING DEVICE

An interior permanent magnet motor includes a stator and a rotor rotatably arranged so as to be opposed to the stator. The rotor includes a rotor core having a plurality of magnet insertion holes formed therein, into which corresponding permanent magnets are respectively inserted. The plurality of permanent magnets and the plurality of magnet insertion holes are each formed into an arc shape that is convex toward a center side of the rotor. When a shortest distance between the adjacent magnet insertion holes is defined as an inter-pole shortest distance (L), a ratio of the inter-pole shortest distance (L) to an outer diameter (D) of the rotor is 0.035≦L/D≦0.045. 1. An interior permanent magnet motor , comprising:a stator; anda rotor rotatably arranged so as to be opposed to the stator,wherein the rotor comprises a rotor core having a plurality of magnet insertion holes formed therein, into which corresponding permanent magnets are respectively inserted,wherein the plurality of permanent magnets and the plurality of magnet insertion holes are each formed into an arc shape that is convex toward a center side of the rotor, andwherein, when a shortest distance between the adjacent magnet insertion holes is defined as an inter-pole shortest distance (L), a ratio of the inter-pole shortest distance (L) to an outer diameter (D) of the rotor is 0.035≦L/D≦0.045.2. An interior permanent magnet motor according to claim 1 , wherein the permanent magnets comprise ferrite magnets.3. An interior permanent magnet motor according to claim 1 , wherein a center of an arc of a radially-inner insertion hole contour surface of the magnet insertion hole and a center of an arc of a radially-outer insertion hole contour surface of the magnet insertion hole coincide with each other.4. A compressor claim 1 , comprising claim 1 , in an airtight container:a motor; anda compression element,{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'wherein the motor comprises the interior permanent ...

METHOD FOR STOPPING A COMPRESSOR AND COMPRESSOR OF A REFRIGERATION APPLIANCE

A compressor of a refrigeration appliance includes a motor, in particular a BLDC motor, and a controller for stopping the motor. The controller is configured to slow down the motor rotating in a first rotating direction until it comes to a standstill and to subsequently position the rotor relative to the stator, in a second rotating direction with a predetermined torque. A method for stopping a compressor of a refrigeration appliance is also provided. 115-. (canceled)16. A method for stopping a compressor of a refrigeration appliance , the method comprising the following steps: a) slowing down the motor rotating in a first rotation direction until the motor stops;', {'b': 208', '209, 'b) positioning the motor in a second rotation direction (, ) with a predefined torque; and'}, 'c) terminating the positioning., 'providing a compressor motor including a cylinder, a piston operating in the cylinder, a piston rod, a rotor and a rotor shaft connecting the rotor to the piston rod;'}17. The method according to claim 16 , wherein the second rotation direction is oriented counter to the first rotation direction.18. The method according to claim 16 , which further comprises:providing the motor as a brushless motor, a PMSM or a sensorless BLDC motor having windings;providing an inverter having switches; andusing a controller to switch the switches and connect the windings to a voltage source to activate the motor.19. The method according to claim 18 , which further comprises generating a predefined torque using a value stored in a storage unit for activating at least one of the inverter or the voltage source.20. The method according to claim 19 , which further comprises deriving the predefined torque or control variables corresponding to the predefined torque from a torque determined before or during step a) or measured variables corresponding to the torque.21. The method according to claim 18 , wherein the positioning step includes incremental rotation of the motor.22. The ...

SYSTEM AND METHOD FOR OPERATING AN AIR CONDITIONING COMPRESSOR FROM ALTERNATIVE SOURCES

The disclosure depicts both a system for operating an air conditioning compressor from alternative sources as well as a method of operating an air conditioning compressor from alternative sources. Both the system and method require a primary source, an air conditioning compressor, and a motor generator. A respective shaft extends from each of these required components, and a respective pulley is mounted to each of the respective shafts, and a single belt engages each respective pulley. 1. A system for operating an air conditioning compressor from alternative sources , the system comprising:a primary drive pulley coupled to a primary drive shaft that extends from a primary source;a sprag bearing having an inner race engaging the primary drive shaft and an outer race engaging the primary drive pulley, the sprag enabling rotation of the inner race relative the outer race in a single chosen direction of rotation;a motor generator pulley coupled to a motor generator shaft that extends from a motor generator;an air conditioning compressor pulley coupled to an air conditioning compressor shaft that extends from an air conditioning compressor;a belt engaging each of the drive shaft pulley, the motor generator pulley, and the air conditioning compressor pulley; wherein,the sprag bearing prevents rotation of the primary drive shaft relative the primary drive shaft pulley when torque is imparted through the primary drive shaft, and wherein,the sprag bearing enables rotation of the primary drive shaft relative the primary drive shaft pulley when the primary drive pulley is rotated by torque transmitted to the primary drive pulley by the belt.2. The system as in claim 1 , the system further comprisinga drive housing adapted to allow the drive shaft to pass therethrough;a reduced-diameter portion of the primary drive shaft positioned adjacent a terminal end of the primary drive shaft; wherein,the sprag bearing is coupled to the reduced diameter portion of the primary drive shaft. ...

COMPRESSOR OVER-LOAD PROTECTION CONTROL METHOD AND APPARATUS

The disclosure discloses a compressor over-load protection control method. The method includes that: the state of a compressor is detected (S); it is judged whether the compressor is under over-load protection (S); and if the compressor is under the over-load protection, fluorine shortage protection is shielded (S). A compressor over-load protection control apparatus includes: a detection unit (), configured to detect the state of a compressor; a judgement unit (), configured to judge whether the compressor is under over-load protection; and a shielding unit (), configured to shield fluorine shortage protection if the compressor is under the over-load protection. By means of the method and apparatus, the problem in the relevant art that a fluorine shortage false alarm is easily triggered is solved, thereby achieving the effect of preventing the fluorine shortage false alarm when the compressor is under the over-load protection. 1. A compressor over-load protection control method , comprising:detecting state of a compressor;judging whether the compressor is under over-load protection; andshielding fluorine shortage protection if the compressor is under the over-load protection.2. The compressor over-load protection control method according to claim 1 , wherein the compressor over-load protection control method is configured for over-load protection of a dehumidifier; the dehumidifier comprises an evaporator and the compressor;detecting the state of the compressor comprises: detecting a tube temperature of the evaporator within a first target time period and an environment temperature and a tube temperature of the evaporator within a second target time period, the first target time period and the second target time period being adjacent time periods, and the second target time period being behind the first target time period; andjudging whether the compressor is under the over-load protection comprises: judging whether the tube temperature within the first target time ...

CONTROLS AND RELATED METHODS FOR MITIGATING LIQUID MIGRATION AND/OR FLOODBACK

The present disclosure relates to controls and related methods for mitigating liquid (e.g., compressor refrigerant, etc.) migration and/or floodback. 1. A method relating to liquid migration within a compressor , the method comprising: [ (i) stopping liquid migration mitigation efforts and indicating an error if liquid is sensed within the compressor by the liquid detection sensor after completion of the predetermined number of times of the compressor bump start routine; or', '(ii) turning on the compressor if liquid is not sensed within the compressor by the liquid detection sensor after completion of the predetermined number of times of the compressor bump start routine;, '(b) if liquid is sensed within the compressor by the liquid detection sensor, running a compressor bump start routine a predetermined number of times, and after completion of the predetermined number of times of the compressor bump start routine, using the liquid detection sensor to determine if liquid is within the compressor;'}, (iii) turning on the compressor if it is determined that the call for cool is not the first call for cool after power up; or', '(iv) running a compressor bump start routine if it is determined that the call for cool is the first call for cool after power up, and turning on the compressor after completion of the compressor bump start routine., '(c) if liquid is not sensed within the compressor by the liquid detection sensor, then determining whether the call for cool is the first call after power up;'}], '(A) using a liquid detection sensor to determine if liquid is within the compressor in response to a call for cool; and'}2. The method of claim 1 , wherein after turning on the compressor claim 1 , the method further comprises:(d) determining whether the compressor has been on for a predetermined amount of time;(e) if it is determined that the compressor has not been on for the predetermined amount of time, the method returns to (A) using a liquid detection sensor to ...

method and device for cooling a motor

The invention relates to a method and to a device for cooling a motor, the motor driving at least one, at least two-stage compressor () of a coolant circuit (), which includes at least one first compression stage and a second compression stage (), and a coolant is conducted through the coolant circuit (), which is brought from a low pressure level to a medium pressure level in the first compression stage (), and from the medium pressure level to a high pressure level in the second compression stage (), and which is then expanded to the medium pressure level following the second compression stage () while outputting heat. 121341344. A method for cooling a motor which drives at least one , at least two-stage compressor () of a coolant circuit () , which includes at least one first compression stage () and a second compression stage () , a coolant being routed through the coolant circuit () , which is brought from a low pressure level to a medium pressure level in the first compression stage () , and from the medium pressure level to a high pressure level in the second compression stage () , and then is expanded to the medium pressure level following the second compression stage () while outputting heat ,{'b': '5', 'wherein the motor () is cooled by a two-phase coolant main flow, which has the medium pressure level.'}2. The method as recited in claim 1 ,{'b': 5', '4', '3', '2, 'wherein the coolant main flow is split into a liquid coolant component and a gaseous coolant component after cooling of the motor (), the gaseous coolant component being supplied to the second compression stage (), and the liquid fluid component being supplied to the first compression stage () of the two-stage compressor ().'}3. The method as recited in or claim 1 ,{'b': 3', '4, 'wherein the coolant is evaporated prior to the first compression stage () while absorbing heat, and is condensed following the second compression stage () while outputting heat.'}4345. The method as recited in one of ...

Portable refrigeration canister

A portable refrigeration container is usable for cooling a bottle of drinkable fluid. It includes a tubular body, a vortex tube, an electronic programmable controller, a tank of compressed air, a battery, a Peltier device, a heat exchanger, and a removable electrical charging station. Optionally, the portable refrigeration container further includes a compressor, a dynamo, and a bracket for attachment to a bicycle frame. The optional compressor and dynamo that electrically recharges the battery, may share a single shaft that is rotatably connected to turn with a bicycle wheel. 1. A portable refrigeration container usable for cooling a bottle of drinkable fluid , the portable refrigeration container comprising:a tubular body comprising: an open top-end; and a plate forming a bottom end, the plate defining a central through-hole;the tubular body having an inner volume defined by an open top-end with a width of not less than 2 inches and a bottom end at not more than 12 inches from the open top-end, the inner volume accessible through the open top-end for removal and insertion of the bottle;a vortex tube comprising a compressed air input line, an output cool air line flowably connected to the inner volume; and an outlet valve exhausting hot air to an environment outside the tubular body;an electronic programmable controller operable to open or close a valve on the output cool air line between the vortex tube and the inner volume;a tank of compressed air valved so as to permit compressed air to flow from the tank into the compressed air input line as controlled by the electronic programmable controller;a battery connected to supply electrical power to the electronic programmable controller;a Peltier device fitting within the central through-hole of the plate, the Peltier device comprising an upper surface and a lower surface, the Peltier device configured so that, when powered, the upper surface is cooled and the lower surface is heated, wherein the upper surface ...

Permanent magnet-embedded electric motor, compressor, and refrigerating and air-conditioning device

An interior permanent magnet motor includes a stator and a rotor. The rotor includes a rotor core having a plurality of magnet receiving holes, and a plurality of permanent magnets are received in each of the magnet receiving holes. A plurality of slits are formed at a part between an outer peripheral surface of the rotor and an outer-side defining line of the each of the magnet receiving holes. At least one space portion is secured between the plurality of permanent magnets, and the space portion is opposed to any one of the plurality of slits in a direction parallel to a magnetic pole center line.

PERMANENT MAGNET EMBEDDED MOTOR, COMPRESSOR, AND REFRIGERATION AND AIR CONDITIONING DEVICE

A rotor core includes a plurality of first electromagnetic steel plates that are stacked in an axial direction and a plurality of second electromagnetic steel plates that are stacked in an axial direction at both ends of the electromagnetic steel plate group thereof. The first electromagnetic steel plates are provided therein with magnet insertion holes and first flux barriers. The second electromagnetic steel plates are provided therein with the magnet insertion holes, second flux barriers, and projections that regulate the positions of the magnets. The second electromagnetic steel plates are stacked at at least one of the axial direction ends of the electromagnetic steel plate group including the plurality of first electromagnetic steel plates and are provided at a position overhanging the axial direction end of a stator core. 1. A permanent magnet embedded motor comprising a rotor core including a plurality of electromagnetic steel plates that are stacked therein , the rotor core being provided in a stator core , wherein a plurality of first electromagnetic steel plates that are stacked in an axial direction, and', 'a plurality of second electromagnetic steel plates,, 'the rotor core includes'} is provided with a plurality of magnet insertion holes that are made therein for inserting magnets therethrough constituting magnetic poles of the rotor core, and', 'is provided with first voids that are formed at both circumferential ends of each of the magnet insertion holes,, 'each of the first electromagnetic steel plates'} second voids that are formed at both circumferential ends of each of the magnet insertion holes, and', 'projections that are formed at both circumferential ends of a radially inside surface of each of the magnet insertion holes so as to regulate a position of the magnets,, 'each of the second electromagnetic steel plates is provided with the magnet insertion holes,'} 'is stacked at at least one of axial direction ends of an electromagnetic steel ...