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 ...

Привод компрессора теплонасосной установки

Gekapselte Kleinkaeltemaschine

Motorverdichter, insbesondere fuer Kleinkaeltemaschinen

MOTORGETRIEBENER VERDICHTER

Ein motorgetriebener Verdichter hat ein Gehäuse, einen Verdichtungsabschnitt und einen Elektromotor, einen Antriebsschaltkreis, ein Schaltkreisgehäuse, einen Steuerschaltkreis, eine Verbindungsleitung und ein metallisches Abschirmelement. Der Verdichtungsabschnitt und der Elektromotor sind in dem Gehäuse aufgenommen. Das Schaltkreisgehäuse ist außerhalb des Gehäuses angeordnet und definiert eine Aufnahmekammer, die den Antriebsschaltkreis empfängt. Der Steuerschaltkreis ist konfiguriert, den Elektromotor durch Steuern des Antriebschaltkreises zu steuern. Die Verbindungsleitung ist mit dem Steuerschaltkreis verbunden und von dem Inneren zu dem Äußeren der Aufnahmekammer gezogen. Das metallische Abschirmelement ist in der Aufnahmekammer angeordnet und bedeckt die Verbindungsleitung. Das Schaltkreisgehäuse hat einen metallischen Abschirmabschnitt, der elektrisch geerdet ist. Das Abschirmelement ist elektrisch mit dem Abschirmabschnitt verbunden.

Motorkompressor fuer Kaeltemaschinen

GEKAPSELTER MOTORKOMPRESSOR FUER INSBESONDERE KAELTEERZEUGER

Kleinkaeltekompressor

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.

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 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.

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. ...

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

KAELTEMASCHINE MIT GEKAPSELTEM MOTORVERDICHTER

Device for the relief of starting compression refridgerators.

Compressor for refridgerators

REFRIGERATION SYSTEM

INTEGRATED MULTI-UNIT REFRIGERATION MOTOR-COMPRESSOR ASSEMBLY

COMPRESSOR UNIT, PARTICULARLY FOR REFRIGERATORS

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

CONTROL APPARATUS FOR TWO SPEED REFRIGERANT COMPRESSOR

VARIABLE CAPACITY COMPRESSOR

REFRIGERATION COMPRESSOR APPARATUS AND METHOD OF ASSEMBLY

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.

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).

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.

Gekapseltes Kompressormotoraggregat.

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

Stopfbüchsloser Kompressor, insbesondere für Kältemaschinen.

Kleinkältemaschine.

Motorkompressoraggregat, insbesondere für hermetisch gekapselte Kleinkältemaschinen

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.

Hermetisches Motor-Kompressor-Aggregat

Gekapseltes Motor-Kolbenkompressor-Aggregat

Gekapseltes Motor-Kolbenkompressor-Aggregat

Procedure for repairing and/or examining, an in particular coolingtechnical plant as well as container accommodated in a pressure tight closed container for the execution of the procedure.

Die Erfindung betrifft ein Verfahren zum Reparieren bzw. Überprüfen einer in einem dauerhaft druckdicht geschlossenen Behälter (10) untergebrachten, insbesondere kältetechnischen Anlage (16), bei welchem Verfahren der Behälter (10) an wenigstens einer vorgegebenen Trennstelle (23) aufgeschnitten wird, die im Behälter (10) befindliche Anlage (16) repariert bzw. überprüft wird, und anschliessend der Behälter (10) an der Trennstelle (23) wieder durch eine stoffschlüssige Verbindung verschlossen wird.

Insulated domestic cooling or freezing appliance - has heat pump used for hot water generation by immersed condenser

Process of cooling of an electrical motor of an enclosed compressor of refrigerator and device for the implementation of this process

Group engine-compressor for calorific pumps

Improvements brought to the motor-compressors for small refrigerating machines

Insulation of great resistance for armor-plated engines and rollings up of power

Engine compressor in hermetic unit and refrigerators provided with a compressor in conformity or similar to the precedent

REFRIGERATEUR OU CONGELATEUR

Réfrigérateur ou congélateur dans lequel est incorporée une pompe à chaleur qui comprend un évaporateur auquel est associé un compartiment à refroidir, un condenseur refroidi et un compresseur commandé par un moteur. Le condenseur 6 est en état d'échange thermique avec la partie inférieure d'un chauffe-eau 7 et le compresseur 4 est muni d'une couche thermiquement isolante 5. L'invention est applicable notamment à des réfrigérateurs et congélateurs à usage domestique.

ENCLOSED MOTOR?COMPRESSOR, PARTICULARLY A SMALL REFRIGERATING MACHINE

MOTOR COMPRESSOR

CRANKSHAFT, IN PARTICULAR FOR HERMETIC COMPRESSORS OF FLUID REFRIGERATING AND PROCEEDED FOR SA MANUFACTURE

TREE BENDS FOR SMALL MACHINES HAS PISTON, IN PARTICULAR FOR HERMETIC COMPRESSORS OF REFRIGERATORS

GROUP COMPRESSING HERMETIC REFRIGERATION

GROUP COMPRESSING HERMETIC REFRIGERATION

Space heating system with heat pump device - has parameters of system chosen to allow compressor to operate at resonant frequency

Improvements brought to the tight capsules for hermetic compressing groups of refrigerators

WAFER POLISHING APPARATUS AND METHOD FOR POLISHING WAFER BY USING THE SAME

REFRIGERATION SYSTEM

A refrigeration system employing carbon dioxide, or the like, as refrigerant of which the pulsation of pressure is reduced sufficiently. The refrigeration system (1) comprises a first refrigerant path (204), ' type mufflers (20, 20a), and a second refrigerant path (205). The ' type muffler has a first silence space (201), a second silence space (202), and communication paths (203, 203a). The first silence space communicates with the first refrigerant path. The second silence space is arranged below the first silence space. The communication path extends from the lower end of the first silence space toward the outside of the first silence space, and communicates with the second silence space. The second refrigerant path extends from the lower end of the second silence space. © KIPO & WIPO 2009 ...

직류 전원 장치, 전동기 구동 장치, 공기 조화기 및 냉장고

... 직류 전원 장치는, 전원(1)에 접속된 정류기(2)와, 직렬 접속된 제1의 콘덴서(6a)와 제2의 콘덴서(6b)로 구성되는 전하 축적부와, 직렬 접속된 제1의 스위칭 소자(4a) 및 제2의 스위칭 소자(4b)와, 전하 축적부로부터의 전하의 역류를 억제하는 역류 저지로 역류 방지 소자(5a, 5b)로 구성되는 전환부(7)와, 리액터(3)와, 제1의 스위칭 소자(4a) 및 제2의 스위칭 소자(4b)의 동작을 제어하는 제어부(8)와, 제1의 콘덴서(6a)의 양단 전압인 제1의 양단 전압과, 제2의 콘덴서(6b)의 양단 전압인 제2의 양단 전압을 검출하는 직류 전압 검출부(10)를 구비하고, 제어부(8)는, 제1의 양단 전압과 제2의 양단 전압의 전압차에 의거하여, 제1의 스위칭 소자(4a), 제2의 스위칭 소자(4b)의 단락 고장을 검출한다.

compressor hermético

arranjo de montagem para os cabos de energizaÇço de um motor elÉtrico de compressor de refrigeraÇço

ELECTRIC MOTOR AND COMPRESSOR CONSTRUCTION

METHOD FOR REPAIRING AND/OR CHECKING AN IN PARTICULAR REFRIGERATING INSTALLATION ACCOMMODATED IN A TANK WHICH IS CLOSED IN A PRESSURE-TIGHT MANNER, AND TANK FOR IMPLEMENTING THE METHOD

Method for repairing and/or checking an in particular refrigerating installation (16) accommodated in a tank (10) which is closed in a permanently pressure-tight manner, in the case of which method the tank (10) is cut open at at least one predetermined severing location (23), the installation (16) located in the tank (10) is repaired and/or checked, and then the tank (10) is closed again at the severing location (23) by an integral connection.

System for managing lubricant levels in tandem compressor assemblies of an HVAC system

The present invention provides a control system for managing lubricant levels in tandem compressor assemblies of a heating, ventilation, and air conditioning (HVAC) system. In transitioning from a partial load that operates a first compressor but not a second compressor of a tandem assembly to a full load that operates both the first and the second compressor, a controller of the HVAC system turns OFF both compressors of the tandem compressor assembly to allow time for lubricant levels to equalize between the first and the second compressor.

Encased refrigerating machine

The invention relates to refrigeration apparatus of the type having a casing which contains an electric motor and reciprocating compressor means. This type of apparatus is subject to creating undesirable vibrations and noises, the reduction of which is the object of the invention. This is done by adding additional mass to the casing which is equal to fifty per cent or more of the mass of the casing. The correspondingly greater mass inertia has the effect of causing the casing to absorb vibrations emanating from the interior of the casing to a lesser extent than before.

COMPRESSOR

ELECTRIC MOTOR AND AIR CONDITIONER

An electric motor includes an annular stator and a consequent-pole-type rotor including an annular rotor core disposed on the inner side of the stator and a plurality of permanent magnets disposed inside the rotor core and arrayed in a circumferential direction of the rotor core, in which the stator is covered with an unsaturated polyester resin.

REFRIGERATION SYSTEM AND METHOD FOR CONTROLLING THE SAME

According to one embodiment, there is provided a refrigeration system including detectors, each of which detects a phase indicative of a displacement of a displacer of each of cryogenic refrigerators; a processor that calculates an operation frequency of a motor of each of the cryogenic refrigerators, which is a frequency that suppresses oscillations or noises generated by reciprocating motions of the displacer of each of the cryogenic refrigerators, based on a detection result obtained by each of the detectors; and drivers, each of which drives the motor of each of the cryogenic refrigerators based on a calculation result obtained by the processor.

REFRIGERANT COMPRESSOR AND REFRIGERATION APPARATUS USING THE SAME

In a refrigerant compressor including a sealed container in which refrigerating machine oil is stored, a shaft part that includes a main shaft and an eccentric shaft, or a bearing part that includes a main bearing and an eccentric bearing, is provided with tapered portions, the tapered portions being respectively formed on one end side and another end side of the shaft part or the bearing part in an axial direction of the bearing part such that a diameter of the shaft part or the bearing part changes from an outer side toward a central side in a longitudinal direction of a crankshaft, each tapered portion allowing the shaft part and the bearing part to come into line contact with each other in a state where an axis of the shaft part is tilted relative to an axis of the bearing part. A ratio C/D, which is a ratio of a clearance C between the shaft part and the bearing part to a diameter D of the shaft part, is set to a value within a range of not less than 4.0×10−4 and not greater than 3.0 ...

HERMETIC COMPRESSOR CONSTRUCTION

Sealed refrigeration unit

БАЗОВАЯ ПЛИТА ДЛЯ УСТАНОВКИ КОМПРЕССОРА

Verdichter,insbesondere fuer Kaeltemaschinen,und Verfahren zu seiner Herstellung

Hermetisch gekapselter Kaeltekompressor

KAELTEANLAGE

LAGERANORDNUNG FUER DIE KURBELWELLE EINES MOTORVERDICHTERS

Rollkolbenverdichter

Hermetisch gekapselte Kleinkaeltemaschine

Refrigerator compressor induction conduit - has silencer to reduce noise integral with moulded plastics conduit

The refrigeration compressor has an induction system which includes a conduit for directing suction gas to the compressor, and an associated silencer to attenuate noise generated by the suction process, while still allowing relatively unrestricted flow through the conduit. The conduit and suction silencer are integrally formed from a suitable plastics composition as a two piece assembly. The associated silencer is in the form of an elongated chamber overlying an opening in the conduit and arranged longitudinally parallel. The opening in the conduit has a surface area at least equal to approx. the cross sectional area of the chamber.

Gekapselter Kaeltemaschinenantrieb

Kaeltesystem

Kompressorvorrichtung

Kompressorvorrichtung, umfassend: einen Kompressor (1) mit einem Gehäuse (11), wobei eine Antriebswelle (12) an einer Seite des Gehäuses (11) montiert ist; und einen Motor (12) mit einer Basis (21), wobei ein Stator (22) in der Basis (21) montiert ist, wobei ein Rotor (23) in dem Stator (22) montiert ist und wobei der Rotor (23) mit der Antriebswelle (12) des Kompressors (1) verbunden ist.

Combined motor and compressor units for use in heat pumps

... 936,255. Cooling dynamo-electric machines. JOSEPH LUCAS (INDUSTRIES) Ltd. March 1, 1962 [March 2, 1961], No. 7598/61. Class 35. A combined motor and compressor unit for a heat pump has the motor 2 mounted vertically above the compressor 3 in a cylindrical casing 1. The motor has an impeller 5 on the rotor shaft below the motor and a compressor inlet 6 above the level of the lower end of the motor. The casing inlet 4 is disposed axially above the motor and an annular baffle 7 defines an annular gap 8. The arrangement being such that in use a portion of the refrigerant entering inlet 4 will flow through the motor 2 and then upwardly to the inlet 6 around the motor whilst the remainder will flow through the gap 8 around the upper part of the motor to the inlet 6.

Controls and operation of variable frequency drives

REFRIGERANT COMPRESSOR

... 1442557 Refrigerant compressors LENNOX INDUSTRIES Inc 19 Dec 1974 [27 Dec 1973] 54931/74 Heading FIN In a reciprocating refrigerant compressor comprising a compression mechanism 22 coupled to a motor 32 and mounted in a casing 11, a temperature sensor 50 responsive to the temperature of the compression mechanism prevents the motor from starting up when the temperature of the mechanism is below a predetermined value. Thus damage to the compressor is avoided due to operation with the lubricating oil in a highly viscous condition. The sensor 50 includes contacts (58) connected in series with the contacts of switches each arranged to prevent motor operation under adverse conditions. The switches include a highpressure switch which opens when the delivery pressure rises above a predetermined value; a lowpressure switch 90 which opens when the suction pressure falls below a predetermined value; a discharge temperature switch 100 which opens when the discharge temperature exceeds a predetermined ...

Improvements in and relating to refrigerating apparatus

... 729,715. Electric motors. AKTIEBOLAGET FARE ARMATURFABRIK. Sept. 28, 1953, No. 26657/53. Class 35. [Also in Groups XIII and XXVIII] Two refrigerant. compressors 8, 9 are driven through connecting rods 10, 11 by eccentrics 12, 13 mounted on concentric shafts 18, 20 actuated by rotors 17, 18, the whole apparatus being mounted in a common frame 7. The inner shaft 18 works in a lower bearing 19 and the outer shaft 20 in an intermediate bearing 21. There may be three or more compressors and motors, the shafts being concentric and the motors being arranged one above the other.

Electromagnetic compressor with reciprocating piston

... 479,922. Electromagnetic compressors. STANKAU, H. E. J. S. May 9, 1936, No. 13156. Void. Convention date, May 9, 1935. [Class 8 (i)] A compressor comprises a piston 4 working in a cylinder 1 and connected by a hollow tube 7 with a piston 6 of smaller diameter working in a cylinder 3 ; the pistons 4, 6 are provided with non-return valves 13, 16 respectively, and the cylinders 1, 3 with suction and delivery valves 12, 15 respectively. The tube 7 carries the armature 5 of an electromagnet, the winding 22 of which surrounds the cylinder 2 which is interposed between the cylinders 1, 3 ; buffer springs 17, 18 are provided. The pistons 4, 6 have a conical cavity and projection respectively. The cylinder 1 communicates with an evaporator, and the cylinder 3 with a condenser coil 19 surrounding the cylinder 1 and leading to a reservoir for refrigerant. The cylinders 1, 3 are provided with cooling ribs 8.

MOTOR COMPRESSOR

... 1,270,036. Compressors. DANFOSS A/S. June 16, 1969 [June 20, 1968], No.30405/69. Heading F1N. The subject matter of this Specification is identical with that described in Specification 1, 254, 956, but the claims are concerned with the provision of balance weights on the bearing disc fixed to the upper end of the crank-shaft.

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 ...

SYSTEM AND METHOD OF CONTROLLING COMPRESSOR, EVAPORATOR FAN, AND CONDENSER FAN SPEEDS DURING A BATTERY MODE OF A REFRIGERATION SYSTEM FOR A CONTAINER OF A VEHICLE

A system is provided that includes mode and battery modules. The mode module, based on parameters, determines whether to operate in a shore power, engine or battery mode. One or more batteries are charged based on received utility power while in the shore power mode. The batteries, while in the engine mode, are charged based on power received from a power source. The battery module, while operating in the battery mode, determines a speed based on a temperature within a temperature controlled container of a vehicle and a state of charge of the batteries. The compressor is run at the speed while in the battery mode. While in the battery mode, the batteries are not being charged based on power from a shore power source and the power source from which power is received during the engine mode. 1. A system comprising:a mode module configured to, based on a plurality of parameters, determine whether to operate in a shore power mode, an engine mode, or a battery mode, wherein one or more batteries are charged based on received utility power while in the shore power mode, and wherein the one or more batteries, while in the engine mode, are charged based on power received from an alternator or a generator; and determine a first speed based on (i) a temperature within a temperature controlled container of a vehicle, and (ii) a state of charge of the one or more batteries, and', 'run a compressor at the first speed,', 'wherein, while in the battery mode, the one or more batteries are not being charged based on power from (i) a shore power source, and (ii) the alternator or the generator from which power is received during the engine mode., 'a battery module configured to, while operating in the battery mode,'}2. The system claim 1 , of claim 1 , wherein while operating in at least one of the shore power mode claim 1 , the engine mode or the battery mode the power is received from the solar panel.3. The system of claim 1 , wherein:the battery module is configured to, while ...

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.

MOTOR FOR USE IN REFRIGERANT ENVIRONMENT

A motor for use in a refrigerant atmosphere includes a rotor configured to rotate about an axis and a stator adjacent the rotor. The stator includes a core defining an end, and a plurality of teeth defining a plurality of slots. A plurality of coils are wrapped around the plurality of teeth such that each coil of the plurality of coils comprises a pair of slot portions extending at least partially through adjacent slots of the plurality of slots and an end turn extending between the slot portions and at least partially across the end. A shell encapsulates the end of the stator such that the end turns of said plurality of coils are substantially sealed from the refrigerant atmosphere. 1. A motor for use in a refrigerant atmosphere , the motor comprising:a rotor configured to rotate about an axis; a core defining an end;', 'a plurality of teeth defining a plurality of slots; and', 'a plurality of coils wrapped around said plurality of teeth such that each coil of said plurality of coils comprises a pair of slot portions extending at least partially through adjacent slots of said plurality of slots and an end turn extending between said slot portions and at least partially across said end; and, 'a stator adjacent said rotor, said stator comprisinga shell encapsulating said end of said stator such that said end turns of said plurality of coils are substantially sealed from the refrigerant atmosphere.2. The motor in accordance with claim 1 , wherein said shell comprises an epoxy.3. The motor in accordance with claim 2 , wherein said epoxy bonds to said end turns of said plurality of coils.4. The motor in accordance with claim 1 , wherein said shell is substantially free of apertures.5. The motor in accordance with claim 1 , wherein said shell has an average thickness in a range from about 4 millimeters (mm) to about 10 mm.6. The motor in accordance with claim 1 , wherein said shell is opaque.7. The motor in accordance with claim 1 , wherein said end comprises a first end ...

LOW ENERGY CONSUMPTION REFRIGERATION SYSTEM WITH A ROTARY PRESSURE EXCHANGER REPLACING THE BULK FLOW COMPRESSOR AND THE HIGH PRESSURE EXPANSION VALVE

A refrigeration system includes a rotary pressure exchanger fluidly coupled to a low pressure loop and a high pressure loop. The rotary pressure exchanger replaces a traditional bulk flow compressor. The rotary pressure exchanger is configured to receive the refrigerant at high pressure from the high pressure loop, to receive the refrigerant at low pressure from the low pressure loop, and to exchange pressure between the refrigerant at high pressure and the refrigerant at low pressure, and wherein a first exiting stream from the rotary pressure exchanger includes the refrigerant at high pressure in the supercritical state or the subcritical state and a second exiting stream from the rotary pressure exchanger includes the refrigerant at low pressure in the liquid state or the two-phase mixture of liquid and vapor. 1. A refrigeration system comprising:a high pressure loop for circulating a refrigerant at a high pressure through it;a gas cooler or a condenser disposed along the high pressure loop, wherein the high pressure loop is configured to reject heat to the surroundings from the refrigerant at high pressure via the gas cooler or the condenser, and the refrigerant at high pressure is in a supercritical state or subcritical state;a second low pressure loop for circulating the refrigerant at a low pressure through it;an evaporator disposed along the low pressure loop, wherein the low pressure loop is configured to absorb heat from the surroundings into the refrigerant at low pressure via the evaporator, and the refrigerant at low pressure is in a liquid state, a vapor state, or a two-phase mixture of liquid and vapor;a rotary pressure exchanger fluidly coupled to the low pressure loop and the high pressure loop, wherein the rotary pressure exchanger is configured to receive the refrigerant at high pressure from the high pressure loop, to receive the refrigerant at low pressure from the low pressure loop, and to exchange pressure between the refrigerant at high ...

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 ...

ELECTRIC MOTOR, COMPRESSOR, AND REFRIGERATION AND AIR CONDITIONING APPARATUS

In an electric motor, a first magnet and a second magnet are accommodated in magnet accommodating apertures of a rotor core. On outer circumferential core portions that exist on a radially outer side of the magnet accommodating apertures, two slits as a pair of first slits, and two slits that are respectively adjacent to each of the first slits are disposed circumferentially outside the pair of first slits as a pair of second slits. The outer circumferential core portions include: a first magnetic portion that exists between the pair of first slits; and a pair of second magnetic portions that respectively exist between the first slits and the second slits. An inter-magnet space portion that exists between the first magnet and the second magnet is positioned within a range of the first magnetic portion in the circumferential direction of the rotor. 1. An electric motor comprising:a stator; anda rotor that is disposed radially inside the stator, and that is rotatable relative to the stator,wherein: a rotor core; and', 'a plurality of permanent magnets that are disposed on the rotor core;, 'the rotor comprisesmagnet accommodating apertures that are equal in number to a number of magnetic poles in the rotor are disposed on the rotor core so as to be spaced apart from each other in a circumferential direction of the rotor;two of the permanent magnets are accommodated as a first magnet and a second magnet in each of the magnet accommodating apertures;the first magnet and the second magnet that are accommodated in the shared magnet accommodating apertures are disposed so as to be separated from each other in the circumferential direction of the rotor;the rotor core comprises a plurality of outer circumferential core portions that respectively exist on a radially outer side of each of the magnet accommodating apertures;on each of the outer circumferential core portions, two slits that are adjacent to each other in the circumferential direction of the rotor are disposed at a ...

SEALED COMPRESSOR AND REFRIGERATION DEVICE

A sealed compressor includes sealed container that contains electric element, and compression element driven by electric element. Compression element includes shaft that includes main shaft portion, and eccentric shaft portion integrally movable with main shaft portion, and bearing portion that supports main shaft portion of shaft to constitute a cantilever bearing. Compression element further includes cylinder that compresses gas, piston reciprocatively inserted into cylinder, and connecting rod that connects eccentric shaft portion with piston. 1. A sealed compressor comprising a sealed container that contains an electric element , and a compression element driven by the electric element , wherein a shaft that includes a main shaft portion, and an eccentric shaft portion integrally movable with the main shaft portion,', 'a bearing portion that supports the main shaft portion of the shaft to constitute a cantilever bearing,', 'a cylinder that compresses gas,', 'a piston reciprocatively inserted into the cylinder, and', 'a connecting rod that connects the eccentric shaft portion with the piston,, 'the compression element includes{'b': 1', '1, 'claim-text': {'br': None, 'i': a', '+c, '1=π/21\u2003\u2003(1), and'}, 'an angle a formed by a first center line indicating a shaft center of the bearing portion, and a second center line indicating a shaft center of the cylinder, and an absolute value c of an angle of a tilt of the shaft with respect to the bearing portion satisfy equation (1) a seal portion producing a clearance from an inner circumferential surface of the cylinder, and forming a sliding surface,', 'an extension portion disposed in a rear of the seal portion, and forming a sliding surface, and', 'a non-sliding portion disposed in the rear of the seal portion, and not forming a sliding surface., 'an outer circumferential surface of the piston includes2. The sealed compressor according to claim 1 , wherein the extension portion has a radius same as a radius 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 ...

Expendable driven heat pump cycles

A cooling system with a compression cooling cycle for a working fluid that passes an expendable fluid through a warm side heat exchanger for the cooling system to cause the expendable fluid to vaporize and thus absorb heat from the working fluid by way of latent heat or enthalpy of vaporization and then running the vaporized expendable through a turbine that drives a compressor for the cooling system.

Heat transfer unit

A heat transfer unit includes: an electrical component casing defining an internal space, the internal space housing a transformer together with a control board and a power supply board; and a cooling unit which cools an electronic component on the power supply board during operation of a compressor.

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

SCROLL COMPRESSOR

A scroll compressor includes a refrigerant suction pipe coupled to a discharge cover or a fixed scroll through a casing in a radial direction, a suction passage communicating the refrigerant suction pipe with a compression chamber, and a suction passage opening and closing valve disposed inside the suction passage to be slidable in an axial direction so as to selectively open or close the suction passage. Accordingly, when the compressor is stopped, oil or refrigerant in the casing can be restricted quickly so as not to flow back to the refrigerant suction pipe through a compression unit. 1. A scroll compressor comprising:a casing;a main frame provided in the casing;a fixed scroll having (i) a fixed end plate coupled to the main frame, (ii) a fixed wrap defined at a first side surface of the fixed end plate, and (iii) a discharge port defined through the fixed end plate at a side of the fixed wrap;an orbiting scroll having (i) an orbiting end plate located between the main frame and the fixed scroll, and (ii) an orbiting wrap defined at a side surface of the orbiting end plate, the orbiting wrap being configured to engage with the fixed wrap to thereby define a compression chamber in engagement with the fixed wrap;a discharge cover defining a discharge space that accommodates an outlet of the discharge port, the discharge cover being coupled to a second side surface of the fixed end plate opposite to the first side surface of the fixed end plate;a refrigerant suction pipe coupled to the discharge cover or the fixed scroll through the casing in a radial direction;a suction passage in fluid communication with the refrigerant suction pipe and the compression chamber; anda suction passage opening and closing valve provided inside the suction passage and configured to slide in an axial direction to thereby selectively open or close the suction passage.2. The scroll compressor of claim 1 , wherein the refrigerant suction pipe is coupled to the discharge cover or the fixed ...

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

A first reactor is provided on the input side of a rectifying circuit that rectifies AC power (on the side of an AC power supply), and on the output side of the rectifying circuit (on the side of a load), first and second capacitors that are connected in series to each other, and first and second switching elements that switch between charging and not charging of the first and second capacitors, respectively, are provided, a second capacitor group in Y-connection, provided with three capacitors, each of which is connected to each phase-terminal of the first reactor on the side of the rectifying circuit, is connected to the midpoint of the first and second switching elements, and the output voltage to the load is boosted, while the on-duty of the first switching element and the on-duty of the second switching element are controlled to be equal to each other. 1. A DC power-supply device that converts an alternating current supplied from an AC power supply to a direct current , and that supplies the direct current to a load , the DC power-supply device comprising:a rectifying circuit that rectifies the alternating current;a first reactor that is inserted between the AC power supply and the rectifying circuit for each phase;a first capacitor group that is provided with a first capacitor and a second capacitor connected in series to each other, and that is connected between output terminals to the load;a switching element group that is provided with a first switching element and a second switching element connected in series to each other, and that is connected in parallel to between the rectifying circuit and the first capacitor group;a backflow prevention unit that prevents a backflow of electric charge to the switching element group, where the electric charge is stored in the first capacitor group by an operation of the switching element group; anda second capacitor group that is provided with three capacitors, in each of which one end is electrically connected to a ...

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.

VARIABLE VOLUME RATIO COMPRESSOR

A compressor and method for controlling the volume ratio of a compressor is provided. The compressor includes a an intake passage, a discharge passage and a compression mechanism, the compression mechanism being positioned to receive vapor from the intake passage and provide compressed vapor to the discharge passage. At least one opening is positioned in the compression mechanism to bypass a portion of the vapor in the compression mechanism to the discharge passage, the at least one opening being sized and positioned to automatically vary a volume ratio in the compressor in response to a varying pressure differential between the intake passage and the discharge passage. 1. A compressor comprising:an intake passage;a discharge passage;a compression mechanism, the compression mechanism being positioned to receive vapor from the intake passage and provide compressed vapor to the discharge passage; andat least one opening positioned in the compression mechanism to bypass a portion of the vapor in the compression mechanism to the discharge passage;wherein the at least one opening being sized and positioned to automatically vary a volume ratio in the compressor in response to a varying pressure differential between the intake passage and the discharge passage.2. The compressor of claim 1 , wherein the volume ratio is variable between a partial load and a full load.3. The compressor of claim 1 , wherein the compressor is a screw compressor.4. The compressor of claim 3 , wherein the screw compressor includes a first rotor and a second rotor.5. The compressor of claim 4 , wherein the at least one opening is positioned in fluid communication with at least one of the first rotor and the second rotor.6. The compressor of claim 4 , wherein the at least one opening is positioned in fluid communication with each of the first rotor and the second rotor.7. The compressor of claim 6 , wherein at least a portion of the at least one opening is positioned symmetric to a plane positioned ...

Device for driving a compressor and method for assembling the device

The invention relates to a device for driving a compressor of a vaporous fluid, particularly an electric motor. The device has a rotor and a stator, which are extended along a common longitudinal axis, as well as an insulation element. The insulation element is designed as a single part and connected with a stator core of the stator in a form-fitting manner such that the stator core and the insulation element form an integral and single-part component of the stator. The invention further relates to a method for producing a stator of the device, particularly the stator core with the insulation element.

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 ...

Motor driving device and air conditioner

A motor driving device and an air conditioner are capable of increasing the efficiency in a low speed region in which a motor performs low speed rotation. The motor driving device that is a motor driving device for driving a motor including stator windings, includes: a connection switching unit that switches connection condition of the stator windings to either of first connection condition and second connection condition different from the first connection condition; and an inverter that converts a DC voltage into AC drive voltages and supplies the AC drive voltages to the stator windings. The inverter includes MOS transistors as switching elements.

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 ...

MOTOR DRIVING DEVICE AND AIR CONDITIONER

A motor driving device that is a device for driving a motor including stator windings, includes: a connection switching unit that includes relays as mechanical switches connected to the stator windings and excitation coils opening or closing the relays by being energized or non-energized with excitation current and switches connection condition of the stator windings to either of first connection condition (star connection) and second connection condition (delta connection) different from the first connection condition by opening or closing the relays; and an inverter that supplies AC drive voltages to the stator windings. 1. A motor driving device for driving a motor including stator windings , comprising:a connection switching unit that includes a mechanical switch connected to the stator windings and an excitation coil opening or closing the mechanical switch by being energized or non-energized with excitation current and switches connection condition of the stator windings to either of star connection and delta connection by opening or closing the mechanical switch; andan inverter that supplies AC drive voltages to the stator windings, wherein the stator windings include a first open winding, a second open winding and a third open winding,the first open winding has a first winding terminal connected to the inverter and a second winding terminal connected to the connection switching unit,the second open winding has a third winding terminal connected to the inverter and a fourth winding terminal connected to the connection switching unit,the third open winding has a fifth winding terminal connected to the inverter and a sixth winding terminal connected to the connection switching unit, andthe connection switching unitswitches the connection condition of the stator windings to the star connection by connecting the second winding terminal of the first open winding, the fourth winding terminal of the second open winding and the sixth winding terminal of the third ...

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 ...

CENTRIFUGAL COMPRESSOR AND MAGNETIC BEARING BACKUP SYSTEM FOR CENTRIFUGAL COMPRESSOR

A centrifugal compressor includes a casing, an impeller, a motor, a diffuser, a magnetic bearing, and a magnetic bearing backup system including at least one dynamic gas bearing and at least one hydrostatic gas bearing. The impeller is attached to a shaft rotatable about a rotation axis. The motor is configured and arranged to rotate the shaft in order to rotate the impeller. The magnetic bearing rotatably supports the shaft. The magnetic bearing backup system is configured and arranged to support the shaft when the magnetic bearing stops operating. The at least one dynamic gas bearing and the at least one hydrostatic gas bearing of the magnetic bearing backup system are disposed radially inwardly relative to the magnetic bearing. 1. A centrifugal compressor used to compress refrigerant and adapted to be used in a chiller system including an evaporator , a condenser , and an expansion mechanism , the centrifugal compressor comprising: 'an impeller attached to a shaft rotatable about a rotation axis;', 'a casing having an inlet portion and an outlet portion;'}a motor configured and arranged to rotate the shaft in order to rotate the impeller;a diffuser disposed in the outlet portion downstream of the impeller;a magnetic bearing rotatably supporting the shaft; and at least one dynamic gas bearing, and', 'at least one hydrostatic gas bearing,', 'the at least one dynamic gas bearing and the at least one hydrostatic gas bearing being disposed radially inwardly relative to the magnetic bearing., 'a magnetic bearing backup system configured and arranged to support the shaft when the magnetic bearing stops operating, the magnetic bearing backup system including'}2. The centrifugal compressor according to claim 1 , whereinthe at least one dynamic gas bearing and the at least one hydrostatic gas bearing are disposed adjacent to both ends of the shaft of the compressor in an axial direction, respectively.3. The centrifugal compressor according to claim 1 , whereinthe at least ...

Systems And Methods For Multi-Stage Operation Of A Compressor

A system for controlling a capacity of a compressor includes a motor of the compressor including a main winding connected at a connection point to an auxiliary winding and a drive configured to control a speed of the motor. The system includes a first switch configured to selectively connect the main winding to either a first line voltage or a first output of the drive, a second switch configured to selectively connect the connection point to either a second line voltage or a second output of the drive, and a third switch configured to selectively connect the auxiliary winding to either a capacitor or a third output of the drive. The system includes a solenoid valve configured to selectively either operate in a first capacity or a second capacity. The system includes a control module configured to control the drive, the first switch, the second switch, and the third switch.

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 ...

IONIC FLUID / CO2 COFLUID REFRIGERATION SYSTEM

A refrigerant system uses a cofluid of ionic liquid and COas a working fluid, and is adapted to selectively bind and release COmolecules from the ionic fluid in exothermic and endothermic processes, respectively. The refrigerant system includes a hermetic compressor which acts as a pump for the substantially uncompressible liquid working fluid. The compressor includes electrical components (such as the electric motor and various wires and connectors) which are electrically isolated from the working fluid in order to prevent electrical shorts caused by the conductive ionic fluid. At the same time, the ionic liquid may act as a lubricating fluid for the compressor components, eliminating any need for separate working and lubricating fluids. 1. A refrigeration system comprising:a compressor having a housing and an electric motor hermetically sealed within the housing;a condenser;an expansion valve;an evaporator; anda quantity of working fluid comprising an electrically conductive ionic liquid and carbon dioxide, the working fluid circulatable through a series of fluid conduits interconnecting the compressor, the condenser, the evaporator and the expansion valve.2. The refrigeration system of claim 1 , wherein the compressor raises a pressure of the quantity of working fluid to 50 bar or less.3. The refrigeration system of claim 1 , further comprising a lubrication system having a lubrication inlet within the housing of the compressor and a lubrication outlet in fluid communication with the electric motor claim 1 , such that the lubrication system circulates the working fluid around moving parts of the electric motor.4. The refrigeration system of claim 3 , wherein the working fluid is accumulated in a sump region at the bottom of the housing claim 3 , and the lubrication system comprises a suction tube having a lower end submerged in the quantity of working fluid in the sump region claim 3 , the suction tube operable to draw the ionic liquid of the working fluid into ...

REFRIGERANT COMPRESSOR AND FREEZING APPARATUS USING SAME

Refrigerant compressor includes electromotive element, and compression element that is driven by electromotive element, includes a slider, and compresses a refrigerant. Freezer oil that lubricates the slider is added with fullerene having a diameter that ranges from 100 pm to 10 nm. 1. A refrigerant compressor comprising:an electromotive element; anda compression element that is driven by the electromotive element, includes a slider, and compresses a refrigerant,wherein a freezer oil that lubricates the slider is added with a fullerene having a diameter that ranges from 100 pm to 10 nm.2. The refrigerant compressor according to claim 1 , wherein one of a C60 fullerene, a C70 fullerene, and a higher-order fullerene including a larger number of carbons than a number of carbons of the C70 fullerene; or', 'a mixed fullerene obtained by mixing at least two of the C60 fullerene, the C70 fullerene, and the higher-order fullerene., 'the fullerene is3. The refrigerant compressor according to claim 1 , wherein a shape of the fullerene is spherical or elliptic.4. The refrigerant compressor according to claim 1 , wherein an additive amount of the fullerene is less than or equal to a saturating amount of dissolution with respect to the freezer oil.5. The refrigerant compressor according to claim 1 , whereinthe refrigerant compressed by the compression element is a hydrofluorocarbon (HFC) refrigerant or a mixed refrigerant including the HFC refrigerant, and one of ester oil, alkylbenzene oil, polyvinyl ether, and polyalkylene glycol; or', 'mixed oil of at least two of the ester oil, the alkylbenzene oil, the polyvinyl ether, and the polyalkylene glycol., 'the freezer oil is6. The refrigerant compressor according to claim 1 , wherein one natural refrigerant of R600a, R290, and R744; or', 'a mixed refrigerant that includes at least one of the R600a, the R290, and the R744, and, 'the refrigerant compressed by the compression element is one of mineral oil, ester oil, alkylbenzene oil ...

COMPRESSOR INCLUDING TERMINAL PROTECTION STRUCTURE

A compressor () includes a casing (), a terminal () protruding from the casing, a first cover () covering the terminal, and a second cover () covering the first cover. 110. A compressor () comprising:{'b': '20', 'a casing ();'}{'b': '29', 'a terminal () protruding from the casing;'}{'b': '50', 'a first cover () covering the terminal; and'}{'b': '70', 'a second cover () covering the first cover.'}2. The compressor according to claim 1 ,wherein the first cover includes resin, and the second cover includes metal.3. The compressor according to claim 1 ,{'b': 1', '2, 'wherein a differential volume (CD) obtained by subtracting a first volume (C), which is a volume of the first cover, from a second volume (C), which is a volume of the second cover, is larger than the first volume.'}4. The compressor according to claim 1 ,{'b': '75', 'wherein a flame-extinguishing member () is provided on an inner surface of the second cover.'}5. The compressor according to claim 1 ,{'b': 51', '52, 'wherein the first cover includes a first opening side surface () in which a first opening () for passing a lead wire is formed, and'}{'b': 71', '72, 'the second cover includes a second opening side surface () in which a second opening () for passing the lead wire is formed.'}6. The compressor according to claim 5 ,{'b': '73', 'wherein the second opening is provided with a seal material () that restrains flow of air passing through the second opening.'}7. The compressor according to claim 5 ,wherein the first opening side surface and the second opening side surface do not face each other.8. The compressor according to claim 7 ,wherein the first opening side surface and the second opening side surface are not parallel to each other.9. The compressor according to claim 5 ,wherein the first opening side surface and the second opening side surface face each other.10. The compressor according to claim 5 ,wherein the first opening has an area larger than an area of the second opening.11. The compressor ...

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.

REFRIGERATION DEVICE

Frame parts are arranged in a row, and in each of which a compressor, an air heat exchanger, a receiver, and a system-side electric component box corresponding to each other are installed as a single unit. 1. A refrigeration apparatus comprising:a plurality of refrigerant circuits to each of which a compressor, an air heat exchanger and a receiver are connected;a plurality of system-side electric component boxes each having an electric component corresponding to an associated one of the compressors; anda support having a plurality of support parts arranged in a row, whereinthe compressor, the air heat exchanger, the receiver, and the system-side electric component box corresponding to each other are installed as a single unit in each of the support parts.2. The refrigeration apparatus of claim 1 , further comprising:a water circuit to which a water heat exchanger allowing a refrigerant and water to exchange heat, and a water pump transporting water are connected; andan operation-side electric component box containing an operation unit, whereinthe plurality of support parts includes a first end support part and a second end support part,the operation-side electric component box containing the operation unit is installed in the first end support part, andthe water pump is installed in the second end support part.3. The refrigeration apparatus of claim 2 , wherein the plurality of support parts include at least one intermediate support part arranged between the first end support part and the second end support part.4. The refrigeration apparatus of claim 2 , whereinin the second end support part, the system-side electric component box,the compressor, and the water pump are arranged in this order from the first end support part toward the second end support part.5. The refrigeration apparatus of claim 3 , whereinin at least one of the intermediate support parts, the system-side electric component box, the compressor, and the water heat exchanger are arranged in this ...

Domestic Refrigeration Device With A Coolant Circuit, And Method For Operating A Domestic Refrigeration Device With A Coolant Circuit

A domestic refrigeration device and a method for operating a domestic refrigeration device. The domestic refrigeration device has a heat-insulated body with a coolable inner container which delimits a coolable interior provided for storing food. A coolant circuit is provided for cooling the coolable interior and includes a compressor and a field-oriented electric drive. The field-oriented electric drive has a field-oriented controller, a converter, and a permanently excited synchronous motor which is connected downstream of the converter and which is part of the compressor or is provided for driving the compressor. 110-. (canceled)11. A method for operating a domestic refrigeration appliance ,the appliance having:a thermally insulated body with a coolable inner container delimiting a coolable interior chamber for storing food, a refrigerant circuit for cooling the coolable interior chamber with a compressor and a controlled electric drive;wherein the controlled electric drive has a field-oriented controller, a converter and a permanently excited three-phase synchronous motor, which is connected downstream of the converter and which is part of the compressor or configured to drive the compressor;wherein the field-oriented controller has a first current control circuit configured to control a transverse current generating a main torque of the permanently excited three-phase synchronous motor, a second current control circuit configured to control a longitudinal current for the permanently excited three-phase synchronous motor and a speed control circuit super ordinate to the first and second current control circuits, the speed control circuit generating a transverse current target value for the first current control circuit as a function of a predetermined target speed for the permanently excited three-phase synchronous motor and an actual speed of the permanently excited three-phase synchronous motor, and wherein output signals of the first and second current control ...

Electric Compressor

An electric compressor is provided in which the connection strength between lead terminals from a motor and an inverter circuit section is improved. The electric compressor is constituted by electrically connecting lead terminals to of a motor and an inverter circuit section for supplying power to the motor by a motor side connection terminal . The inverter circuit section is protrusively provided with terminal connection portions to each having a screw groove portion. The motor side connection terminal has a flat plate terminal portion. The flat plate terminal portion is fixed to the inverter circuit section by a nut screwed into each of the screw groove portions of the terminal connection portions to and electrically connected to the inverter circuit section in that state. 1. An electric compressor comprising lead terminals of a motor and an inverter circuit section for supplying power to the motor , which are electrically connected by a connection terminal ,wherein the inverter circuit section is protrusively provided with terminal connection portions each having a screw groove portion, andwherein the connection terminal has a flat plate terminal portion, and the flat plate terminal portion is fixed to the inverter circuit section by a nut screwed into the screw groove portion of the terminal connection portion and electrically connected to the inverter circuit section in that state.2. The electric compressor according to claim 1 , wherein the inverter circuit section includes an inverter control board on which a control circuit is mounted claim 1 , a resin-molded sleeve assembly claim 1 , and a power module on which power switching elements are mounted claim 1 , and the inverter control board claim 1 , the sleeve assembly claim 1 , and the power module are sequentially stacked claim 1 ,wherein the terminal connection portion is comprised of a male screw having the screw groove portion and integrally resin-molded with the sleeve assembly in a state in which the ...

INTEGRATED EXPANDER-MOTOR COMPRESSOR

An expander and motor-compressor unit is disclosed. The unit includes a casing and an electric motor arranged in the casing. A compressor is arranged in the casing and drivingly coupled to the electric motor through a central shaft. Furthermore, a turbo-expander is arranged for rotation in the casing and is drivingly coupled to the electric motor and to the compressor through the central shaft. 1. An expander and motor-compressor unit comprising:a casing;an electric motor arranged in the casing;a multi-stage compressor drivingly coupled to the electric motor through a central shaft and arranged in the casing;wherein a turbo-expander is arranged for rotation in the casing and is drivingly coupled to the electric motor and to the compressor through the central shaft, wherein the central shaft is supported by at least three radial bearings.2. The expander and motor-compressor unit of claim 1 , wherein the turbo-expander and the compressor are fluidly coupled such that gas expanded through the turbo-expander is delivered to the compressor and compressed thereby.3. The expander and motor-compressor unit of claim 1 , wherein a liquid removal arrangement is positioned between the turbo-expander and the compressor claim 1 , and wherein the liquid removal arrangement is fluidly coupled to a delivery side of the turbo-expander and to a suction side of the compressor claim 1 , such that expanded gas from the turbo-expander flows through the liquid removal arrangement and is subsequently delivered to the suction side of the compressor.4. The expander and motor-compressor unit of claim 1 , wherein the turbo-expander is positioned in an overhung configuration on the central shaft.5. The expander and motor-compressor unit of claim 1 , wherein the electric motor is arranged between the turbo-expander and the compressor.6. The expander and motor-compressor unit of claim 1 , wherein the turbo-expander is arranged in a first casing compartment and the electric motor is arranged in a ...

REFRIGERATION DEVICE

Electric power generated by a generator driven by an engine is converted into an alternating current of any arbitrary frequency by an inverter. A compressor of a refrigeration cycle includes a motor driven by power supplied from the inverter and a refrigerant compression unit rotatably driven by the motor to suck in, compress, and discharge refrigerant. A mode changeover switch is switchable between a start/stop operation mode that allows the engine to start and stop, and a continuous operation mode in which the engine is continuously operated. When the start/stop operation mode is selected by the mode changeover switch, the controller controls the inverter such that the target rotation speed of the compressor is fixed at a high rotation speed which is higher than the rotation speed according to the difference between the set temperature and the internal temperature. 1. A refrigeration device that cools air in an internal space , comprising:an engine for power generation;a generator driven by the engine to generate electricity;an inverter that generates an alternating current of a variable frequency from the electric power generated by the generator; a motor driven by power supplied from the inverter, and', 'a refrigerant compression unit rotatably driven by the motor to suck in, compress, and discharge refrigerant;, 'a compressor including'}a radiator that dissipates heat from the refrigerant discharged from the compressor by exchanging heat between the refrigerant and outside air;an expansion valve that depressurizes the refrigerant that flows out of the radiator;an evaporator that cools the air in the internal space by exchanging heat between the refrigerant that flows out of the expansion valve and the air in the internal space, the evaporator causing the evaporated refrigerant to flow out toward the compressor;a mode changeover switch switchable between a start/stop operation mode that allows the engine to start and stop, and a continuous operation mode in ...

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

MULTI-CYLINDER ROTARY COMPRESSOR AND VAPOR COMPRESSION REFRIGERATION CYCLE SYSTEM INCLUDING THE MULTI-CYLINDER ROTARY COMPRESSOR

A multi-cylinder rotary compressor includes plural compression mechanism parts. A drawing force is applied to a vane of at least one of the compression mechanism parts radially outward with respect to a drive shaft, making a pressing force pressing the vane toward a piston smaller than in other compression mechanism parts. In a normal state, a pressing force due to a gas pressure difference between a suction pressure and a discharge pressure is larger than the drawing force, and a vane front end is pressed against a rotary piston peripheral wall. When the drawing force becomes greater than the pressing force, the vane front end is moved to separate from the rotary piston peripheral wall with a space through which oil is introduced from a sealed container, and a retention mechanism retains the vane separated from the piston, and the compression mechanism part switches to an uncompressed state. 1: A multi-cylinder rotary compressor comprising:a drive shaft including a plurality of eccentric-pin shaft portions;an electric motor configured to drive and rotate the drive shaft;a plurality of compression mechanisms; anda sealed container housing the electric motor and the plurality of compression mechanisms and storing lubricating oil at a bottom thereof, a cylinder having a cylinder chamber into which low-pressure refrigerant is sucked from a suction pressure space and from which compressed high-pressure refrigerant is discharged to a discharge pressure space,', 'a ring-shaped piston slidably attached to each of the plurality of eccentric-pin shaft portions of the drive shaft and configured to eccentrically rotate in the cylinder chamber,', 'a vane configured to separate the cylinder chamber into two spaces when a front end of the vane is pushed against an outer peripheral surface of the piston,', 'a vane groove housing the vane in such a manner that the vane reciprocates therein and being open to the cylinder chamber, and', 'a vane rear chamber housing a rear end of the ...

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 ...

TEMPERATURE PREDICTION DEVICE, COMPRESSOR WITH MAGNETIC BEARING MOUNTED THEREON, TEMPERATURE PREDICTION METHOD AND PROGRAM

A temperature prediction device includes an application voltage specifying unit which specifics a voltage value applied to an electromagnetic coil based on a distance from a distance detection unit provided in the electromagnetic coil to an output shaft, a coil current detection unit which detects a current value flowing when a voltage is applied to the electromagnetic coil on the basis of the voltage value specified by the application voltage specifying unit, and a coil temperature estimation unit which estimates a temperature of the electromagnetic coil on the basis of the voltage value specified by the application voltage specifying unit, the current value detected by the coil current detection unit, and a relational expression between the voltage value applied to the electromagnetic coil, the current value flowing when a voltage is applied to the electromagnet coil on the basis of the voltage value applied to the electromagnetic coil, and the temperature of the electromagnetic coil. 1. A temperature prediction device comprising:an application voltage specifying unit configured to specify a voltage value applied to an electromagnetic coil based on a distance from a distance detection unit provided in the electromagnetic coil to an output shaft;a coil current detection unit configured to detect a current value flowing when a voltage is applied to the electromagnetic coil on the basis of the voltage value specified by the application voltage specifying unit;a coil temperature estimation unit configured to estimate a temperature of the electromagnetic coil on the basis of the voltage value specified by the application voltage specifying unit, the current value detected by the coil current detection unit, and a relational expression between the voltage value applied to the electromagnetic coil, the current value flowing to the electromagnetic coil in accordance with the voltage value applied to the electromagnetic coil, and the temperature of the electromagnetic coil ...

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 ...

Permanent-magnet-embedded electric motor for compressor, compressor, and refrigeration cycle device

A permanent-magnet-embedded electric motor for a compressor includes a stator core and a rotor. The rotor includes a rotor core including a plurality of magnet insertion holes, and an end plate disposed on an end portion of the rotor core in an axial direction of the rotor core. An outer diameter of the end plate is equal to an outer diameter of the rotor core. The end plate is formed of a magnetic material that is more ferromagnetic than a magnetic material of the rotor core. A plurality of through-holes each communicating with corresponding one of the magnet insertion holes are formed in the end plate, the through-holes extending in the axial direction of the rotor.

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 ...

PUSH-PULL COMPRESSOR HAVING ULTRA-HIGH EFFICIENCY FOR CRYOCOOLERS OR OTHER SYSTEMS

A method includes generating a first varying electromagnetic field using a first voice coil of a first actuator. The method also includes repeatedly attracting and repelling a first magnet of the first actuator based on the first varying electromagnetic field. The first voice coil is connected to a first piston of a compressor, and the first magnet is connected to an opposing second piston of the compressor. Attracting the first magnet narrows a space between the pistons, and repelling the first magnet enlarges the space between the pistons. The method may further include generating a second varying electromagnetic field using a second voice coil of a second actuator and repeatedly attracting and repelling a second magnet of the second actuator based on the second varying electromagnetic field. The second voice coil may be connected to the second piston, and the second magnet may be connected to the first piston. 1. An apparatus comprising: a first piston and an opposing second piston, the pistons configured to move inward to narrow a space therebetween and to move outward to enlarge the space therebetween; and', 'a first voice coil actuator configured to cause movement of the pistons, the first voice coil actuator comprising a first voice coil and a first magnet, the first voice coil configured to attract and repel the first magnet;, 'a compressor configured to compress a fluid, the compressor comprisingwherein the first voice coil is connected to the first piston and the first magnet is connected to the second piston.2. The apparatus of claim 1 , wherein the first voice coil is configured to generate a first varying electromagnetic field that repeatedly attracts and then repels the first magnet during multiple compression cycles.3. The apparatus of claim 2 , wherein:attraction of the first magnet to the first voice coil pulls the pistons inward; andrepelling of the first magnet from the first voice coil pushes the pistons outward.4. The apparatus of claim 1 , ...

SINGLE-STAGE COMPRESSOR AND ENERGY SYSTEM USING THE SAME

A single-stage compressor including one compressing unit, includes: a housing having a compressing chamber formed therein and including a suction port, which is located in one side of the compressing chamber and into which a working fluid enters, and an injection port, which is located on the compressing chamber to be spaced apart from the suction port by a predetermined distance and into which an intermediate-pressure working fluid is injected; and an intermediate-pressure valve installed on an intermediate-pressure fluid flow path on which the intermediate-pressure working fluid moves and configured to control supply of the intermediate-pressure working fluid so that the intermediate-pressure working fluid is supplied to the injection port in response to an intermediate pressure of the compressing chamber. In the injection-type compressor having a single chamber, a working fluid is injected at an intermediate pressure (not in the proximity of a suction pressure) so that efficiency and capability of the injection-type compressor having a single chamber can be improved. The injection-type compressor having a single chamber has a simple structure and is easily manufactured so that a pressure of an injection port and a corresponding intermediate pressure can be selectively set in various ways. 1. A single-stage compressor including one compressing unit , the single-stage compressor comprising:a housing having a compressing chamber formed therein and comprising a suction port, which is located in one side of the compressing chamber and into which a working fluid enters, and an injection port, which is located on the compressing chamber to be spaced apart from the suction port by a predetermined distance and into which an intermediate-pressure working fluid is injected; andan intermediate-pressure valve installed on an intermediate-pressure fluid flow path on which the intermediate-pressure working fluid moves and configured to control supply of the intermediate- ...

Linear compressor

The present disclosure relates to a linear compressor. The linear compressor according to an aspect of the present disclosure includes a shell, a cylinder, a piston, and a muffler. Also, an internal space in which at least a portion of the muffler is inserted is formed in the piston, and the muffler is disposed in contact with the inner wall of the piston forming the internal space.

HEAT PUMP SYSTEM

A hybrid heat pump system including, as a compressor for a refrigerant circuit, an engine-driven compressor and an electric-motor-driven compressor to achieve a rational structure with redundancy. The hybrid heat pump system further includes an operation control unit and a power source unit. The operation control unit is comprised of an engine control unit controlling the operation of an engine and an electric-motor control unit controlling the operation of an electric motor, which are individually provided. The power source unit converts commercial electric power into operating electric power and supplies the operating electric power to the operation control unit. The power source unit is comprised of an engine-side power source unit supplying the operating electric power to the engine control unit and an electric-motor-side power source unit supplying the operating electric power to the electric-motor control unit, which are individually provided. 1. A heat pump system comprising:a compressor for a refrigerant circuit in which a refrigerant circulates, the compressor including an engine-driven compressor configured to be driven by an engine to compress the refrigerant and an electric-motor-driven compressor configured to be driven by an electric motor to compress the refrigerant;an operation control unit; anda power source unit configured to convert commercial electric power into operating electric power and supply the operating electric power to the operation control unit, wherein:the operation control unit includes an engine control unit configured to control operation of the engine and an electric-motor control unit configured to control operation of the electric motor, andthe power source unit includes an engine-side power source unit configured to supply operating electric power to the engine control unit and an electric-motor-side power source unit configured to supply operating electric power to the electric-motor control unit, the engine-side power source ...

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 ...

TRANSVERSE FLUX RECIPROCATING MOTOR AND LINEAR COMPRESSOR INCLUDING THE SAME

A transverse flux reciprocating motor and a linear compressor including the same are described. The transverse flux reciprocating motor includes an outer stator including a stator core, a teeth portion extended from the stator core to an inside, and a teeth shoe extended from an inner end of the teeth portion in a circumferential direction; a coil disposed on the teeth portion; an inner stator disposed in the outer stator and configured to reciprocate in an axial direction due to an electromagnetic interaction with the coil; and a magnet disposed on the teeth shoe and facing the inner stator. The stator core includes a plurality of core plates stacked in the axial direction. The magnet includes first and second magnets that are spaced from each other in the axial direction. 1. A transverse flux reciprocating motor comprising: a stator core comprising a plurality of core plates stacked in an axial direction,', 'a teeth portion that extends from the stator core to an inside of the stator core, and', 'a teeth shoe that extends from an inner end of the teeth portion in a circumferential direction of the stator core;, 'an outer stator comprisinga coil disposed at the teeth portion;an inner stator disposed in the outer stator and configured to reciprocate relative to the outer stator in the axial direction based on electromagnetic interaction with the coil; anda magnet that is disposed at the teeth shoe and faces the inner stator, the magnet comprising a first magnet and a second magnet that are spaced apart from each other in the axial direction.2. The transverse flux reciprocating motor of claim 1 , wherein the coil comprises a plurality of coils that are spaced apart from one another in the circumferential direction claim 1 , the plurality of coils being provided in an even number claim 1 , andwherein two adjacent coils among the plurality of coils are configured to generate magnetic flux in opposite directions to each other.3. The transverse flux reciprocating motor ...

Discharge gas manifold for use with multiple compressors

A discharge gas manifold having a main conduit, an end feeder conduit, and at least one intermediate feeder conduit, wherein the at least one intermediate feeder conduit contains a portion, adjacent to the main conduit, that forms an angle between 0°-60° with the axis of the main conduit.

MOTOR DRIVE DEVICE AND REFRIGERATION EQUIPMENT

A motor drive that enables the elimination of distortion of a motor current caused by direct current voltage ripples with the use of a smoothing capacitor having a small capacity and refrigeration equipment. A motor drive includes a rectifier circuit, a smoothing capacitor, voltage detector, an inverter circuit, current sensor, and a controller configured to control the inverter circuit. The controller has a voltage controller configured to generate a voltage command value used for controlling the motor, a ripple frequency arithmetic unit configured to operate a ripple frequency included in the direct current voltage signal, and a harmonic suppressor configured to process a signal based on the direct current signal using an S controller having a gain near the ripple frequency and output a corrected amount. The inverter circuit is controlled based on a signal that the voltage command value is corrected using the corrected amount. 1. A motor drive device having an alternating power supply connected on an input side and a motor connected on an output side , the motor drive device comprising:a rectifier circuit configured to convert an alternating current voltage supplied from the alternating power supply into a direct current voltage;a smoothing capacitor configured to smooth a direct current voltage outputted from the rectifier circuit, the smoothing capacitor being formed of a film capacitor or a capacitor having a capacity of 200 microfarad or less;voltage detecting means configured to detect a voltage across the smoothing capacitor and output a direct current voltage signal;an inverter circuit configured to convert a direct current voltage outputted from the smoothing capacitor into an alternating current voltage;current sensing means configured to detect a direct current or an alternating current of the inverter circuit and output a current signal; anda controller configured to control the inverter circuit based on the direct current voltage signal and the current ...

COMPRESSOR AND METHOD FOR CONTROLLING THE COMPRESSOR

A compressor and a control method thereof are provided. The compressor includes a motor with a rotor of a permanent magnet. According to embodiments, the method of controlling the compressor includes: applying a detection current to the motor in response to a command of starting the compressor; detecting whether there is demagnetization of the permanent magnet of the rotor according to a response of the motor to the applied detection current; resetting an operating parameter of the compressor if there is the demagnetization; and starting the compressor according to the reset operating parameters. According to embodiments of the present disclosure, when the compressor is to be started, demagnetization is detected first, and the operating parameter are set accordingly, so as to suppress or avoid performance degeneration due to the demagnetization. 1. A method of controlling a compressor comprising a motor with a rotor of a permanent magnet , the method comprising:applying a detection current to the motor in response to a command of starting the compressor;detecting, according to a response of the motor to the detection current, whether there is demagnetization of the permanent magnet of the rotor;resetting an operating parameter of the compressor if there is the demagnetization; andstarting the compressor according to the reset operating parameter.2. The method according to claim 1 , wherein the detection current has a q-axis component claim 1 , with a d-axis component of zero.3. The method according to claim 2 , wherein detecting whether there is demagnetization of the permanent magnet of the rotor comprises:calculating a flux linkage of the permanent magnet; andcomparing the calculated flux linkage of the permanent magnet with a theoretical value of a flux linkage of the permanent magnet to determine whether there is the demagnetization or not.4. The method according to claim 1 , wherein detecting whether there is demagnetization of the permanent magnet of the rotor ...

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 ...

COMPRESSOR AND THE COMPRESSOR CONTROLLING METHOD

The present invention provides a compressor that includes: one or more impellers that axially suck and centrifugally compress a refrigerant; a rotary shaft that is connected with the impeller and a motor for rotating the impeller; a plurality of magnetic bearings that supports the rotary shaft in the air so that the rotary shaft can rotate; a gap sensor that senses the distance from the rotary shaft; and a controller that determines abnormal wire connection of the magnetic bearings on the basis of information from the gap sensor. The controller can sense movement of the rotary shaft through the gap sensor while controlling the amount of current supplied to any one of the magnetic bearings and can determine whether there is abnormal wire connection on the basis of the information. 1. A compressor comprising:one or more impellers that axially suck and centrifugally compress a refrigerant;a rotary shaft that is connected with the impeller and a motor for rotating the impeller;a plurality of magnetic bearings that supports the rotary shaft in the air so that the rotary shaft can rotate;a gap sensor that senses the distance from the rotary shaft; anda controller that determines abnormal wire connection of the magnetic bearings on the basis of information from the gap sensor,wherein the controller senses movement of the rotary shaft through the gap sensor while controlling the amount of current supplied to any one of the magnetic bearings and determines whether there is abnormal wire connection on the basis of the information.2. The compressor of claim 1 , wherein when determining that there is abnormal wire connection in a magnetic bearing claim 1 , the controller supplies a current to two adjacent magnetic bearings of the magnetic bearings.3. The compressor of claim 2 , wherein the controller reduces step by step the current applied to any one of the two adjacent magnetic bearings claim 2 , and senses the position of the rotary shaft using the gap sensor every time the ...

HEAT PUMP DEVICE

A heat pump device includes a compression mechanism for compressing refrigerant, a motor for driving the compression mechanism, a shell housing the compression mechanism and the motor, a discharge muffler located outside the shell, a first pipe connecting the compression mechanism to the discharge muffler, and a thermal insulator (a first thermal insulating material and a second thermal insulating material). The shell and the discharge muffler are spatially located next to each other without being in contact with each other. The thermal insulator is at least partially located in a space where a distance between an outer surface of the shell and an outer surface of the discharge muffler is minimum. 1. A heat pump device , comprising:a compression mechanism configured to compress refrigerant;a motor configured to drive the compression mechanism;a shell housing the compression mechanism and the motor;a discharge muffler being outside of the shell;a first pipe connecting the compression mechanism to the discharge muffler; anda thermal insulator,the shell and the discharge muffler being arranged in a first space inside a housing,the thermal insulator being at least partially located in a space having a minimum distance between an outer surface of the shell and an outer surface of the discharge muffler,the thermal insulator including a first thermal insulating material configured to at least partially cover the discharge muffler and a second thermal insulating material configured to at least partially cover the shell,the first thermal insulating material having higher thermal resistance than the second thermal insulating material.23-. (canceled)4. The heat pump device according to claim 1 , further comprisinga first heat exchanger connected to the discharge muffler, the first heat exchanger being configured to exchange heat between the refrigerant and a heating medium, whereinthe first thermal insulating material is configured to at least partially cover the first heat ...

HEAT PUMP DEVICE

A heat pump device includes: a compression mechanism for compressing refrigerant; a motor for driving the compression mechanism; a shell housing the compression mechanism and the motor; a discharge muffler located outside the shell, a first pipe which connects the compression mechanism to the discharge muffler; a first heat exchanger which includes a refrigerant inlet and which exchanges heat between the refrigerant and a heating medium; and a second pipe which connects the discharge muffler to the refrigerant inlet of the first heat exchanger. The shell and the discharge muffler are spatially located next to each other. The discharge muffler and the first heat exchanger are spatially located next to each other. The discharge muffler is at least partially located in a space between the shell and the first heat exchanger. 1. A heat pump device , comprising:a compression mechanism configured to compress refrigerant;a motor configured to drive the compression mechanism;a shell housing the compression mechanism and the motor;a discharge muffler being outside of the shell;a first pipe connecting the compression mechanism to the discharge muffler;a first heat exchanger including a refrigerant inlet, the first heat exchanger being configured to exchange heat between the refrigerant and a heating medium; anda second pipe connecting the discharge muffler to the refrigerant inlet of the first heat exchanger,the shell and the discharge muffler being spatially located next to each other,the discharge muffler being entirely located in a space between the shell and the first heat exchanger.2. The heat pump device according to claim 1 , wherein the space between the shell and the first heat exchanger is defined by a surface obtained by moving a straight line in contact with both the shell and the first heat exchanger claim 1 , an outer surface of the shell claim 1 , and an outer surface of the first heat exchanger.3. The heat pump device according to claim 1 , wherein the ...

SEALED COMPRESSOR AND REFRIGERATION DEVICE USING THE SAME

In a sealed compressor, electrically-operated element and compressive element driven by electrically-operated element are housed in the inside of sealed container. Compressive element includes shaft formed of main shaft and eccentric shaft, and cylinder block having: bearing which pivotally supports main shaft of shaft; and cylinder. Further, the sealed compressor includes piston which is movable in the cylinder in a reciprocating manner, and connecting portion which connects eccentric shaft and piston to each other. Electrically-operated element is an outer-rotor-type motor which includes stator, and rotor which surrounds an outer periphery of stator and is disposed coaxially with stator. Further, stator is fixed to outer peripheral surface of bearing by adhesive agent. 1. A sealed compressor wherein , an electrically-operated element and a compressive element driven by the electrically-operated element are housed in a sealed container , a shaft formed of a main shaft and an eccentric shaft;', 'a cylinder block having: a bearing which pivotally supports the main shaft of the shaft; and a cylinder;', 'a piston which is movable in the cylinder in a reciprocating manner; and', 'a connecting portion which connects the eccentric shaft and the piston to each other,, 'the compressive element includesthe electrically-operated element is an outer-rotor-type motor which includes: a stator; and a rotor which surrounds an outer periphery of the stator and is disposed coaxially with the stator, andthe stator is fixed to an outer peripheral surface of the bearing by an adhesive agent.2. The sealed compressor according to claim 1 , wherein a fit-on portion which fits on the outer peripheral surface of the bearing is formed on a portion of an inner peripheral portion of the stator.3. The sealed compressor according to claim 2 , wherein the fit-on portion is formed on an upper end surface and a lower end surface of the stator claim 2 , and a gap is formed between an inner ...

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 ...

HEAT-DRIVEN VAPOR-COMPRESSION SYSTEM FOR AIR CONDITIONING AND REFRIGERATION

Embodiments of the present invention reduce the amount of energy required to operate air-conditioners and refrigerators by providing a vapor-compression system that harnesses a low- or no-cost source of energy, namely, heat, and uses the harnessed heat to power a new kind of compressor, called a “burst compressor” and a new kind of pump, called a “vapor pump.” The heat-driven burst compressor pressurizes the refrigerant, while also providing “push and pull” vapor refrigerant to the vapor pump. The vapor pump, actuated by the high pressure refrigerant in gaseous form provided by the burst compressor, is configured to pump a combination of gaseous, vaporous and liquid refrigerant out of the receiver tank and inject that low pressure refrigerant mix into the burst compressor, where it is heated to change the state of the refrigerant to a heated, pressurized gas. Then the heated, pressurized gas is released in bursts into the other components of the vapor compression cycle. Thus, embodiments of the present invention use heat to provide cold. Because of this arrangement, vapor-compression systems constructed and arranged to operate according to embodiments of the present invention are able to provide air-conditioning and/or refrigeration much more efficiently and with much less expense than traditional vapor compression systems for air-conditioning and refrigeration. 1. A system for cooling air in an enclosed space , comprising:(a) a refrigerant;(b) an evaporator located within the enclosed space where the refrigerant is allowed boil from the heat of the air, thereby absorbing heat from the air in the enclosed space;(c) a receiver tank that receives the refrigerant from the evaporator;(d) a primary condenser located outside of the enclosed space, which condenses the refrigerant and permits the refrigerant to release the absorbed heat into a second space;(e) a closed-loop circulation system, fluidly connected to the evaporator, the receiver tank and the condenser, which ...

ROTOR, MOTOR, COMPRESSOR, AND REFRIGERATION APPARATUS

A rotor, a motor, a compressor and a refrigeration apparatus are provided. The rotor has a rotor core, permanent magnets and multiple slits. The rotor core has multiple installation recesses. The permanent magnets are provided in the installation recesses to form magnetic poles. The multiple slits are arranged at the rotor core and positioned at respective sides of the installation recesses away from a rotation axis of the rotor. A connection line between central points of two end portions of the slit close to and away from the installation recess forms a direction line of the slit within a cross-section perpendicular to the rotation axis of the rotor. A central line of any magnetic pole passing through a central axis of the rotor core is defined as an axis d. 1. A rotor for a motor , comprising:a rotor core comprising a plurality of installation recesses, wherein the installation recesses are distributed along a circumferential direction of the rotor core;a plurality of permanent magnets arranged in the installation recesses to form a plurality of magnetic pole, wherein the plurality of permanent magnets comprise a first permanent magnet and a second permanent magnet, and an extension line of a side wall of the first permanent magnet away from a rotation axis of the rotor and an extension line of a side wall of the second permanent magnet away from the rotation axis of the rotor intersect at a point and do not coincide with each other; anda plurality of slits arranged on the rotor core and positioned on a side of one of the plurality of installation recesses away from the rotation axis of the rotor, a connection line between central points of two end portions of each slit close to and away from the installation recess forming a direction line of the slit within a cross-section perpendicular to the rotation axis of the rotor,wherein a central line of any one of the plurality of magnetic poles passing through a central axis of the rotor core is defined as an axis d, ...

PERMANENT-MAGNET-EMBEDDED ELECTRIC MOTOR AND COMPRESSOR

A rotor of a permanent-magnet-embedded electric motor includes an annular rotor core having a plurality of magnet insertion holes formed in a circumferential direction, and permanent magnets inserted into the magnet insertion holes, respectively. The rotor core is formed by alternately stacking a first core block and a second core block in an axial direction of the rotor core, the first core block not having slits between each of the magnet insertion holes and a circumferential surface of the rotor core, and the second core block having the slits between each of the magnet insertion holes and the circumferential surface of the rotor core. One of the slits and one end of the permanent magnet are arrayed in a radial direction, and the other slit and the other end of the permanent magnet are arrayed in the radial direction. 1. A rotor comprising:an annular rotor core in which a plurality of magnet insertion holes are formed along a circumferential direction; anda plurality of permanent magnets inserted into the magnet insertion holes, respectively, whereinthe rotor core is configured by alternately stacking, in an axial direction of the rotor core, a first core block and a second core block, the first core block having no slit on an outer side of each of the magnet insertion holes in a radial direction of the rotor core, the second core block having a pair of slits on the outer side of each of the magnet insertion holes in the radial direction of the rotor core,one of the pair of slits and one end of each of the permanent magnets in the circumferential direction are arrayed in the radial direction of the rotor core, and another of the pair of slits and another end of each of the permanent magnets in the circumferential direction are arrayed in the radial direction of the rotor core, anda ratio of a total length of the first core block in the axial direction to a length of the rotor core in the axial direction is 0.35 or higher and 0.45 or lower.2. The rotor according ...

POWER CONVERSION APPARATUS AND AIR CONDITIONER INCLUDING THE SAME

A power conversion apparatus includes a rectifier to rectify a voltage of an input alternating current (AC) power source and a voltage drop device to output a dropped voltage using the voltage from the rectifier, and the voltage drop device includes a transformer and a communication voltage output device provided at a secondary side of the transformer to output a first direct current (DC) voltage for operation of a communication device. The communication voltage output device includes a first resistor provided at the secondary side of the transformer to reduce an output change rate of the first DC voltage and first and second zener diodes connected between the first resistor and ground to limit an upper limit of the first DC voltage. Accordingly, it is possible to stably supply a voltage to a communication unit while reducing standby power. 1. A power conversion apparatus comprising:a rectifier to rectify a voltage of an input alternating current (AC) power source; and a transformer having a primary side and a secondary side; and', a first resistor provided at the secondary side of the transformer to reduce an output change rate of the first DC voltage; and', 'first and second zener diodes connected between the first resistor and the ground to limit an upper limit of the first DC voltage., 'a communication voltage output module provided at the secondary side of the transformer to output a first direct current (DC) voltage to operate a communication module, and wherein the communication voltage output module includes], 'a voltage drop module to output a dropped voltage using the voltage from the rectifier, wherein the voltage drop module includes2. The power conversion apparatus according to claim 1 , wherein the communication voltage output module further includes second and third resistors provided between the first resistor and the first and second zener diodes and connected in parallel.3. The power conversion apparatus according to claim 1 , wherein the ...

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 ...

COMPRESSOR AND REFRIGERATION DEVICE

A compressor and a refrigeration device are provided. The compressor has a housing, a first cylinder, a first piston, a second cylinder and a second piston. The housing has a first air outlet port and a second air outlet port. The first cylinder has an accommodating cavity, and the first piston is eccentrically disposed in the first accommodating cavity. The second cylinder has a second accommodating cavity, and the second piston is eccentrically disposed in the second accommodating cavity. 1. A compressor comprising:a housing, wherein a first air outlet port and a second air outlet port not in communication with each other are disposed in the housing;a first cylinder and a first piston, wherein the first cylinder is provided with a first accommodating cavity, and the first piston is eccentrically disposed in the first accommodating cavity; anda second cylinder and a second piston, wherein the second cylinder is provided with a second accommodating cavity, and the second piston is eccentrically disposed in the second accommodating cavity.2. The compressor according to claim 1 , wherein:the inner diameter of the first cylinder is D1, an eccentric distance of the first piston relative to the first accommodating cavity is e1, the height of the first cylinder is H1, and an exhaust pressure of the first cylinder is P1, and the first cylinder exhausts gas through the first air outlet port; andthe inner diameter of the second cylinder is D2, an eccentric distance of the second piston relative to the second accommodation cavity is e2, the height of the second cylinder is H2, and an exhaust pressure of the second cylinder is P2, and the second cylinder exhausts gas through the second air outlet port;wherein P1 Подробнее

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 chiller system , comprising:{'claim-text': ['an oil-free compressor having a drive motor and a bearing, the bearing configured to receive a flow of the refrigerant;', 'a condenser;', 'an evaporator;', 'a liquid temperature affecting device configured to affect a temperature of the flow of the refrigerant, the liquid temperature affecting device configured to receive liquid refrigerant from the chiller system; and'], '#text': 'a refrigeration circuit configured to circulate a refrigerant, including:'}{'claim-text': ['determine a film thickness of refrigerant at the bearing; and', 'adjust an output temperature of the liquid temperature affecting device based on the film thickness.'], '#text': 'a controller configured to:'}2. The chiller system of claim 1 , wherein the liquid temperature affecting device is a heat exchanger is configured to receive the liquid refrigerant from the refrigeration circuit from a point between the condenser and the evaporator.3. The chiller system of claim 2 , wherein the heat exchanger is a brazed plate heat exchanger.4. The chiller system of claim 2 , further comprising a modifier configured to adjust an inlet temperature at the heat exchanger for refrigerant exchanging heat with the flow of refrigerant.5. The chiller system of claim 4 , wherein the controller is configured to adjust the output temperature of the flow of refrigerant by controlling the modifier.6. The chiller system of claim 1 , ...

Control System For Multiple Compressors

A control system for controlling an output for a plurality of compressors includes a control unit receiving a first value from a first sensor and generating a first output based on the first value. The control unit receives a second value from a second sensor and derives a final output from the first output and the second value. A plurality of compressors receives the control commands from the control unit based on the final output.

Oil Flow Through The Bearings Of A Scroll Compressor

A compressor according to the principles of the present disclosure includes a shell, a compression mechanism, a driveshaft, a drive bearing cavity, and a drive bearing. The compression mechanism is disposed within the shell and includes an orbiting scroll member and a non-orbiting scroll member. The orbiting scroll member includes a baseplate and a tubular portion extending axially from the baseplate. The driveshaft is drivingly engaged with the orbiting scroll member. The drive bearing cavity is disposed between an outer radial surface of the driveshaft and an inner radial surface of the tubular portion of the orbiting scroll member. The baseplate of the orbiting scroll member defines a first discharge passage in fluid communication with the drive bearing cavity. The drive bearing is disposed in the drive bearing cavity and is disposed about the driveshaft adjacent to the first end of the driveshaft. 1. A compressor comprising:a shell;a compression mechanism disposed within the shell, the compression mechanism including an orbiting scroll member and a non-orbiting scroll member, the orbiting scroll member including a baseplate and a tubular portion extending axially from the baseplate, the tubular portion defining a driveshaft cavity;a driveshaft drivingly engaged with the orbiting scroll member, the driveshaft having a first end disposed in the driveshaft cavity of the orbiting scroll member and a second end opposite of the first end;a drive bearing cavity disposed between an outer radial surface of the driveshaft and an inner radial surface of the tubular portion of the orbiting scroll member, the baseplate of the orbiting scroll member defining a first discharge passage in fluid communication with the drive bearing cavity; anda drive bearing disposed in the drive bearing cavity and disposed about the driveshaft adjacent to the first end of the driveshaft.2. The compressor of further comprising an unloader bushing disposed about the driveshaft adjacent to the ...

REFRIGERANT COMPRESSOR

A refrigerant compressor includes a compression mechanism portion, a drive portion, a crankshaft, a main bearing and an auxiliary bearing that support the crankshaft, and a sealed container that accommodates therein the compression mechanism portion, the drive portion, the crankshaft, the main bearing, and the auxiliary bearing. The auxiliary bearing is configured of an antifriction bearing and provided in an auxiliary bearing housing attached to the sealed container. The auxiliary bearing housing includes an opening for inserting the auxiliary bearing on the drive portion side, and includes a housing cover covering the opening. An insulating sleeve configured of an insulating material is provided between the crankshaft and the auxiliary bearing. The insulating sleeve includes a cylinder portion located between the crankshaft and the auxiliary bearing, and a flange portion located between the auxiliary bearing and the housing cover and extended in an outer diameter direction. 1. A refrigerant compressor comprising:a compression mechanism portion that compresses a refrigerant;a drive portion for driving the compression mechanism portion;a crankshaft that is rotationally driven by the drive portion;a main bearing that rotationally supports a main shaft portion of the crankshaft on the compression mechanism portion side of the drive portion;an auxiliary bearing that rotationally supports an auxiliary shaft portion of the crankshaft on the side of the drive portion opposite to the compression mechanism portion; anda sealed container that accommodates therein the compression mechanism portion, the drive portion, the crankshaft, the main bearing, and the auxiliary bearing, whereinthe auxiliary bearing is configured of an antifriction bearing including an inner race, an outer race, and a rolling element, and is provided in an auxiliary bearing housing attached to the sealed container,the auxiliary bearing housing includes an opening for inserting the auxiliary bearing on ...

MOTOR, COMPRESSOR, AND REFRIGERATION DEVICE

A motor, a compressor and a refrigeration device are provided. The motor has a stator, a plurality of coil sets and a rotor. The stator has multiple stator teeth arranged along a peripheral direction. Every two adjacent stator teeth define a stator groove. Each coil set has multiple coils wound on the stator teeth. Each coil bypasses a corresponding stator tooth. The rotor is arranged inside the stator and has a rotor core and multiple permanent magnets. The rotor core has multiple slots. The slots are distributed circumferentially around a rotation center line of the rotor core. The permanent magnets are arranged in the slots. 1. A motor comprising:a stator comprising a plurality of stator teeth arranged along a peripheral direction, wherein two adjacent stator teeth of the plurality of stator teeth define a stator groove;a plurality of coil sets, wherein each coil set comprises a plurality of coils wound on the stator teeth, and each coil correspondingly bypasses one corresponding stator tooth; and{'claim-text': ['wherein the rotor core defines a plurality of slots,', 'wherein the plurality of slots are distributed circumferentially around a rotation center line of the rotor core, and', 'wherein the plurality of permanent magnets are arranged in the plurality of slots.'], '#text': 'a rotor arranged inside the stator, wherein the rotor comprises a rotor core and a plurality of permanent magnets,'}2. The motor according to claim 1 ,wherein the remanence Br of each of the plurality of permanent magnets at 20° C. satisfies: Br≥1.2 T,wherein an inner diameter Φsi of the stator and an outer diameter Φso of the stator satisfy: 0.558≤Φsi/Φso≤0.576, and{'sup': '2', '#text': 'wherein a gap g between the stator and the rotor and the outer diameter Φr of the rotor satisfy: 180<Φr/g≤240.'}3. The motor according to claim 1 ,{'sup': ['2', '2'], '#text': 'wherein the rotational inertia J of the rotor, a gap g between the stator and the rotor, the mass m of the rotor and the outer ...

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 ...

Compressor driving motor and cooling method for same

A compressor driving motor includes: a rotor; a stator surrounding an outer peripheral part of the rotor; a case accommodating the rotor and the stator; a liquid introduction path introducing a liquid refrigerant from a refrigerant circuit including a compressor; and a gas introduction path introducing a gas refrigerant from the refrigerant circuit. The case includes a downstream chamber located on one end side of the rotor and the stator in an axial direction and provided with the compressor, and an upstream chamber located on the other end side in the axial direction and communicating with the downstream chamber through a gap between the outer peripheral part of the rotor and an inner peripheral part of the stator. The introduced liquid refrigerant and the introduced gas refrigerant are mixed in the upstream chamber, and wet steam of the mixed refrigerant is supplied to at least the gap.

DOMESTIC REFRIGERATION APPLIANCE WITH A COOLANT CIRCUIT AND METHOD FOR OPERATING A DOMESTIC REFRIGERATION APPLIANCE WITH A COOLANT CIRCUIT

A domestic refrigeration appliance has a heat-insulated housing with a coolable inner container delimiting a coolable interior for storing foods. The interior is cooled with a coolant circuit that includes a compressor with a three-phase motor operated by an actuator via electrically powered motor windings. The actuator is actuated at least indirectly to operate the compressor in a switched-on state with a rotational speed of the three-phase motor at least approximately equal to a predetermined rotational speed. The actuator is caused to switch off the compressor such that the rotational speed of the three-phase motor decreases to a predetermined minimum rotational speed, and thereafter to switch off the three-phase motor for at least a predetermined period of time by de-energizing the motor windings. The period of time is selected long enough to reduce the speed of the motor, beginning from the minimum rotational speed, to reach standstill. 110- (canceled)11. A method of operating a domestic refrigeration appliance , the appliance having a heat-insulated housing with a coolable inner container , which delimits a coolable interior for storing foods , an actuator , and a coolant circuit with a compressor for cooling the coolable interior , the compressor having a three-phase motor with motor windings to be operated by the actuator by electrically powering the motor windings , the method comprising:operating the compressor in a switched-on state by operating the three-phase motor, activated by the actuator, substantially at a predetermined rotational speed;switching off the compressor from the switched-on state by:reducing the rotational speed of the three-phase motor, under control of the actuator, until the rotational speed reaches a predetermined minimum rotational speed; andsubsequently switching off the three-phase motor by de-energizing the motor windings for a predetermined period of time;thereby selecting the predetermined period of time to be long enough for ...

COMPRESSOR AND REFRIGERATION DEVICE

A compressor and a refrigeration device are provided. The compressor has a crankshaft, a connecting structure, and an avoidance part arranged on the connecting structure and/or the crankshaft. The avoidance part is located at a position where the connecting structure is matched with the crankshaft. The avoidance part is configured to be suitable for avoiding at least one of the connecting structure and the crankshaft. A gap between the crankshaft and the connecting structure is increased through the arrangement of the avoidance part, so that the avoidance part can avoid the crankshaft when the crankshaft is obliquely deformed. 1. A compressor comprising:a crankshaft;a connecting structure arranged on the crankshaft; andan avoidance part arranged on the connecting structure and/or the crankshaft,wherein the avoidance part is located at a position where the connecting structure is matched with the crankshaft, and the avoidance part is configured to be suitable for avoiding at least one of the connecting structure and the crankshaft.2. The compressor according to claim 1 , wherein:a gap is formed between the crankshaft and the connecting structure, andthe gap corresponding to the avoidance part is enlarged in the direction away from the middle part of the connecting structure along the axial direction of the crankshaft.3. The compressor according to claim 2 , wherein:the sum of gaps at the two sides of the axis of the crankshaft is defined as a bilateral gap at the same axial height in the cross section of the compressor in the axial direction of the crankshaft; and{'sub': 0', '0', '0, 'the minimum value of the bilateral gap corresponding to the avoidance part is δ, the difference between the maximum value of the bilateral gap corresponding to the avoidance part and δis δ, the diameter of the crankshaft corresponding to the minimum part of the bilateral gap corresponding to the avoidance part is D, and the length of the avoidance part is h along the axial direction of ...

HIGH PERFORMANCE COMPRESSORS AND VAPOR COMPRESSION SYSTEMS

The present disclosure relates to a new breed of high performance compressors and associated vapor compression systems that can be used in wide ranging refrigeration, cooling and heating applications with significantly increased compressor isentropic efficiency, motor efficiency, reliability and longevity of the motor, the compressor pump and the system as a whole, as well as COP, heating capacity, and SEER of the new vapor compression systems utilizing the new high performance compressors. The design philosophy and modifications to the current configuration of rolling piston rotary compressor to arrive at the high-performance version of the same type will be readily applicable to other types of vapor compression compressors with only minor changes opening the way for adoption of the new design philosophy by the entire compressor industry resulting in serious reduction of carbon footprint for air conditioners, heat pumps and refrigerators worldwide. 137-. (canceled)38. A compressor comprising:at least one pressure containment shell;a motor and a motor heat exchanger, wherein the motor and the motor heat exchanger are positioned in a pressure containment shell of the at least one pressure containment shell;a pump body positioned in a pressure shell of the at least one pressure containment shell;wherein the pump body includes a pump operatively coupled to the motor;wherein the motor heat exchanger is configured to accept refrigerant diverted from a condenser or a high pressure heat exchanger of a refrigeration system, whereby the motor heat exchanger is configured to cool the motor, to decrease operating temperature of the motor, and to increase electrical efficiency of the motor;a compression chamber within the pump body; andat least one supercharging port or valve provided in the pump body leading into the compression chamber configured to receive the diverted refrigerant, after cooling the motor, such that the diverted refrigerant is injected back into the ...

REFRIGERATION APPARATUS

Refrigeration apparatus R that includes a refrigerant circuit composed of compressor , gas cooler , electric expansion valve , and evaporator includes: electric expansion valve ; tank ; split heat exchanger ; electric expansion valve ; electric expansion valve ; auxiliary circuit ; main circuit ; low-pressure sensor ; and control apparatus , in which control apparatus regulates the pressure of the refrigerant after the refrigerant flows out of tank but before flows into electric expansion valve to be a first constant pressure when the pressure detected by low-pressure sensor is smaller than a specified pressure, and regulates the pressure of the refrigerant to be a second constant pressure smaller than the first constant pressure when the pressure detected by low-pressure sensor is larger than the specified pressure. 1. A refrigeration apparatus that includes a refrigerant circuit composed of a compression section , a gas cooler , a main throttle section , and an evaporator , the refrigeration apparatus comprising:a pressure-regulation throttle section connected to the refrigerant circuit that is on a downstream side of the gas cooler and is on an upstream side of the main throttle section;a tank connected to the refrigerant circuit that is on a downstream side of the pressure-regulation throttle section and is on the upstream side of the main throttle section;a split heat exchanger provided in the refrigerant circuit that is on a downstream side of the tank and is on the upstream side of the main throttle section;a first auxiliary throttle section and a second auxiliary throttle section, the first auxiliary throttle section regulating pressure of refrigerant flowing out of a pipe provided in a first height of the tank, the second auxiliary throttle section regulating the pressure of the refrigerant flowing out of a pipe provided in a position lower than the first height;an auxiliary circuit that allows the refrigerant to flow through a first flow channel of the ...

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 ...

REFRIGERATION CYCLE DEVICE

A refrigeration cycle apparatus includes a refrigeration cycle in which a compressor, a heat source-side heat exchanger, an expansion device, and a load-side heat exchanger are connected by refrigerant pipes to circulate refrigerant. The refrigerant is a single-component refrigerant composed of 1,1,2-trifluoroethylene or a refrigerant mixture containing 1,1,2-trifluoroethylene. The compressor has a compression chamber and a motor in a compressor shell. A resin material is used as an insulating material for the motor. 1. A refrigeration cycle apparatus comprising a refrigeration cycle in which a compressor , a first heat exchanger , an expansion device , and a second heat exchanger are connected by refrigerant pipes to circulate refrigerant and a refrigerating machine oil ,the refrigerant being a single-component refrigerant comprising 1,1,2-trifluoroethylene or a refrigerant mixture containing 1,1,2-trifluoroethylene and another substance,the compressor having, in a sealed container thereof, a compression chamber and a motor, and being a low pressure shell-type compressor configured to cause the refrigerant to flow into the sealed container, compress the refrigerant in the sealed container by using the compression chamber, and discharge the compressed refrigerant out of the sealed container, andthe refrigeration cycle apparatus being operable at an operational state in which the refrigerant in a two-phase state having a quality of more than 0 and less than 1 is allowed to flow into the sealed container of the compressor,the refrigerating machine oil having a solubility of 50 wt % or more with respect to the refrigerant when a temperature of the refrigerant is 0 degrees C. and a pressure of the refrigerant is a saturation pressure at a refrigerant temperature of 0 degrees C.,the motor being insulated with a resin material serving as an insulating material.2. A refrigeration cycle apparatus comprising a refrigeration cycle in which a compressor , a first heat ...

REFRIGERATION APPARATUS

Refrigeration apparatus R that includes a refrigerant circuit composed of compression section , gas cooler , electric expansion valve , and evaporator includes: electric expansion valve ; tank ; split heat exchanger ; electric expansion valve ; electric expansion valves and ; auxiliary circuit , main circuit , and control apparatus , in which control apparatus regulates the gas cooler outlet temperature based on outside air temperature when the outside air temperature is higher than a specified temperature, and regulates the gas cooler outlet temperature based on saturation temperature ST of saturated liquid of the refrigerant after the refrigerant flows out of compressor but before flows into electric expansion valve , when the outside air temperature is lower than the specified temperature. 1. A refrigeration apparatus that includes a refrigerant circuit composed of a compression section , a gas cooler , a main throttle section , and an evaporator , the refrigeration apparatus comprising:a pressure-regulation throttle section connected to the refrigerant circuit that is on a downstream side of the gas cooler and is on an upstream side of the main throttle section;a tank connected to the refrigerant circuit that is on a downstream of the pressure-regulation throttle section and is on the upstream side of the main throttle section;a split heat exchanger provided in the refrigerant circuit that is on a downstream side of the tank and is on the upstream side of the main throttle section;a first auxiliary throttle section and a second auxiliary throttle section, the first auxiliary throttle section regulating a pressure of the refrigerant flowing out of a pipe provided in a first height of the tank, the second auxiliary throttle section regulating the pressure of the refrigerant flowing out of a pipe provided in a position lower than the first height;an auxiliary circuit that allows the refrigerant to flow through a first flow channel of the split heat exchanger and ...

MAGNETIC BEARING MOTOR COMPRESSOR

A sealed induction motor for a chiller assembly is provided. The induction motor includes a stator, a rotor, and a shaft with a first end and a second end. The rotor and the shaft are configured to rotate relative to the stator. The induction motor further includes a first magnetic bearing assembly located proximate the first end of the shaft and a second magnetic bearing assembly located proximate the second end of the shaft. The first and the second magnetic bearing assemblies are configured to support the shaft. The shaft is coupled to a centrifugal compressor using a direct drive connection. 1. A sealed induction motor for a chiller assembly , the induction motor comprising:a stator;a rotor;a shaft comprising a first end and a second end, the rotor and the shaft configured to rotate relative to the stator;a first magnetic bearing assembly located proximate the first end of the shaft; anda second magnetic bearing assembly located proximate the second end of the shaft;wherein the first and the second magnetic bearing assemblies are configured to support the shaft, and wherein the shaft is coupled to a centrifugal compressor.2. The sealed induction motor of claim 1 , wherein the centrifugal compressor utilizes a low pressure refrigerant having an operating pressure of less than 400 kPa.3. The sealed induction motor of claim 2 , wherein the low pressure refrigerant is R1233zd.4. The sealed induction motor of claim 1 , wherein the first magnetic bearing assembly and the second magnetic bearing assembly comprise radial magnetic bearing assemblies configured to support the shaft in a radial direction.5. The sealed induction motor of claim 4 , further comprising a third magnetic bearing assembly.6. The sealed induction motor of claim 5 , wherein the third magnetic bearing assembly comprises a thrust magnetic bearing assembly configured to support the shaft in an axial direction.7. The sealed induction motor of claim 6 , wherein the first claim 6 , second claim 6 , and ...

Heat-transfer fluid for a centrifugal compressor

A process for cooling or heating a fluid or a body by means of a vapour compression circuit including a centrifugal compressor and containing a heat-transfer fluid, the heat-transfer fluid including at least two compounds selected from 2,3,3,3-tetrafluoropropene, 1,3,3,3-tetrafluoropropene, 1,1,1,2-tetrafluoropropene, 1,1-difluoroethane and 3,3,3-trifluoropropene, in which: the ratio of the Mach number of the centrifugal compressor to the Mach number which the centrifugal compressor has under the same operating conditions if the heat-transfer fluid is replaced with 1,1,1,2-tetrafluoroethane in the vapour compression circuit is greater than or equal to 0.97 and less than or equal to 1.03; the compression ratio of the centrifugal compressor is less than or equal to the compression ratio which the centrifugal compressor has under the same operating conditions if the heat-transfer fluid is replaced with 1,1,12-tetrafluorethane in the vapour compression circuit.

REFRIGERATOR

The purpose of the present invention is to provide a refrigerator in which the capacity of an oil tank can be made smaller than in the prior art while a foaming phenomenon is addressed. The refrigerator is provided with: a refrigeration cycle which includes a condenser, an evaporator, and an electric compressor having a compression mechanism to be driven by a motor and in which a refrigerant circulates; an oil tank in which a lubricating oil is stored; a heater which is set in the oil tank and which heats the lubricating oil; a lubricating oil supply line which is connected to the oil tank and which supplies the lubricating oil from the oil tank into a housing having the motor housed therein; a lubricating oil discharge line which returns the lubricating oil from the housing back to the oil tank; a pressure equalizing pipe which has one end connected to the oil tank and the other end connected to the refrigeration cycle; and a buffer tank which is set to the pressure equalizing pipe, which receives the refrigerant and the lubricating oil flowing out from the oil tank, and in which the lubricating oil is stored. 1. A chiller comprising:a refrigerating cycle that includes an electric compressor having a compression mechanism driven by a motor, a condenser, and an evaporator, and in which a refrigerant is circulated;an oil tank that stores a lubricant;a heater that is installed inside the oil tank so as to heat the lubricant;an oil circulation pipe that is connected to the oil tank so as to supply the lubricant from the oil tank into a housing for accommodating the motor and to return the lubricant from the housing to the oil tank;a pressure equalizing pipe, one end of which is connected to the oil tank, separately from the oil circulation pipe, and the other end of which is connected to the refrigerating cycle; anda buffer tank that is installed in the pressure equalizing pipe, and that receives the refrigerant and the lubricant which flow out of the oil tank so as to ...

HEAT PUMP APPARATUS

A heat pump apparatus, including: a two-cylinder compressor including: an electric motor; two compression units to be driven by the electric motor, the two-cylinder compressor being structured to switch between two operation modes including single operation in which one of the compression units is brought into a non-compression state, and parallel operation in which both the compression units are brought into a compression state; an inverter drive control device supplying drive power to the electric motor of the two-cylinder compressor; an operation mode detecting-determining unit determining a current operation mode based on an electric signal acquired from the inverter drive control device; and a capacity control device determining a rotating frequency of the electric motor so that a temperature of a target object is brought close to a set value, to thereby control the inverter drive control device based on a result of determination of the operation mode detecting-determining unit. 1. A heat pump apparatus , comprising: an electric motor, and', 'two compression units to be driven by the electric motor,', 'the two-cylinder compressor being structured to switch between two operation modes including a single operation in which one of the two compression units is brought into a non-compression state, and a parallel operation in which both the two compression units are brought into a compression state in accordance with operation conditions,, 'a two-cylinder compressor including'}a heat-rejecting-side heat exchanger;a pressure reducing mechanism; 'the two-cylinder compressor, the heat-rejecting-side heat exchanger, the pressure reducing mechanism, and the heat-removing-side heat exchanger being connected to one another;', 'a heat-removing-side heat exchanger,'}an inverter drive control device configured to supply drive power to the electric motor of the two-cylinder compressor;an operation mode detecting-determining unit configured to determine either one of the two ...

COMPRESSOR, REFRIGERATION CYCLE APPARATUS, AND AIR CONDITIONER

A compressor is configured such that an axis center of a rotating shaft for transmitting rotation of a rotor to a compressing unit for compressing a refrigerant is offset from a rotor center of the rotor, and, when the rotor is divided into, with respect to the rotor center, a first portion located on a side in a direction from the axis center to the rotor center and a second portion located on a side in a direction from the rotor center to the axis center, a magnetic force of the first portion is stronger than a magnetic force of the second portion. This configuration allows the rotor to generate non-uniform magnetic attractive forces during the rotation of the rotor and thereby can suppress vibration generated due to rotation of an eccentric portion of the compressing unit and reduce noise. 1. A compressor , whereinan axis center of a rotating shaft for transmitting rotation of a rotor to a compressing unit for compressing a refrigerant is offset from a radial direction center of the rotor, and whereinthe rotor includes, with respect to the radial direction center of the rotor, a first portion located on a side in a direction from the axis center to the radial direction center of the rotor and a second portion located on a side in a direction from the radial direction center of the rotor to the axis center.2. The compressor according to claim 1 , wherein the rotor is divided into two rotors split in an axial direction of the rotating shaft claim 1 ,the magnetic force of the first portion is stronger than the magnetic force of the second portion in each of the rotors, andthe first portion of one rotor and the first portion of the other rotor are disposed symmetrically with respect to the axis center of the rotating shaft.3. The compressor according to claim 2 , wherein a rotor formed such that the radial direction center of the rotor coincides with the axis center of the rotating shaft is disposed between the one rotor and the other rotor.4. The compressor ...

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, COMPRESSOR, AND AIR CONDITIONER

A motor includes a stator core having an annular shape about an axis, a coil wound on the stator core, and a rotor core disposed on an inner side of the stator core in a radial direction about the axis. The rotor core has a stacked body in which a plurality of steel laminations are stacked in a direction of the axis, and a magnet insertion hole famed in the stacked body. The rotor core has a length in the direction of the axis longer than that of the stator core. A magnet is inserted in the magnet insertion hole. The rotor core has a first region where the magnet is inserted in the magnet insertion hole and a second region where the magnet is not inserted in the magnet insertion hole, in the direction of the axis. At least one steel lamination in the second region of the rotor core has an opening area smaller than an opening area of each steel lamination in the first region of the rotor core. 1. A motor comprising:a stator core having an annular shape about an axis;a coil wound on the stator core;a rotor core disposed on an inner side of the stator core in a radial direction about the axis, the rotor core having a stacked body in which a plurality of steel laminations are stacked in a direction of the axis and a magnet insertion hole formed in the stacked body, the rotor core having a length in the direction of the axis longer than that of the stator core; anda magnet inserted in the magnet insertion hole,wherein the rotor core has a first region where the magnet is inserted in the magnet insertion hole and a second region where the magnet is not inserted in the magnet insertion hole, in the direction of the axis, andwherein each of the steel laminations in the first region has one or more slits on an outer side of the magnet insertion hole in the radial direction, andwherein the at least one steel lamination in the second region has no slit or has one or more slits, a number or area of which is smaller than that of the one or more slits of each of the steel ...

POWER CONVERTER AND AIR-CONDITIONING APPARATUS EMPLOYING THE SAME

A power converter includes a first substrate on which a module including a switching element is mounted, a second substrate on which a smoothing capacitor is mounted, and a terminal block connecting the first substrate and the second substrate, with the first and second substrates located to face each other. The terminal block includes a current path over which at least one of current flowing from the module to the smoothing capacitor and current flowing from the smoothing capacitor to the module flows. 1. A power converter comprising:a first substrate on which a module including a switching element is mounted;a second substrate on which a smoothing capacitor is mounted; anda terminal block connecting the first substrate and the second substrate, with the first and second substrates located to face each other, the terminal block including a current path over which at least one of current flowing from the module to the smoothing capacitor and current flowing from the smoothing capacitor to the module flows, the terminal block being soldered to the first substrate, and screwed on the second substrate.2. A power converter comprising:a first substrate on which a module including a switching element is mounted;a second substrate on which a smoothing capacitor is mounted; anda plurality of terminal blocks each connecting the first substrate and the second substrate, with the first substrate and the second substrate located to face each other, each of the terminal blocks including a current path over which at least one of current flowing from the module to the smoothing capacitor and current flowing from the smoothing capacitor to the module flows, the plurality of terminal blocks includinga first terminal block having a greater support capacity in a first direction than a support capacity in a second direction different from the first direction, anda second terminal block having a greater support capacity in the second direction than a support capacity in the first ...

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': [' ...

AIRCRAFT HAVING AN ENGINE AND A SYSTEM FOR COOLING THE ENGINE

An aircraft having an engine, a cabin, an air conditioning system collecting the hot air from the engine, so as to treat the hot air, regulate a temperature of the hot air and send the hot air towards the cabin via a main line, an air line channeling the air leaving the cabin, and an arrangement for cooling the engine using the air thus drawn off by the air line. By drawing off the air at the outlet of the cabin, the performance of the engine is improved and the fuel consumption is reduced.

LINEAR COMPRESSOR AND REFRIGERATOR INCLUDING SAME

The present disclosure relates to a linear compressor and a refrigerator including the same. A linear compressor according to the spirit of the present disclosure includes a shell, a cylinder, a piston and a muffler. And the muffler includes a plurality of flow tubes extending in a flow direction of the refrigerant, and a plurality of through-holes passing through at least one of the plurality of flow tubes.

TURBO CHILLER

A turbo chiller that has an oil-free configuration, which reduces the frequency of maintenance and maintenance-induced release of refrigerant, and can achieve a reduced environmental impact by utilizing the characteristics of the low-pressure refrigerant R1233zd(E) that reaches negative pressure at a saturation temperature of 18° C. or lower. The turbo chiller comprises a refrigeration cycle that includes a turbo compressor, a condenser, a decompression device, and an evaporator connected in sequence via piping and is filled with a refrigerant; wherein the refrigerant is a low-pressure refrigerant R1233zd(E) refrigerant with low global warming potential and low ozone depletion potential; the turbo compressor has a direct drive configuration in which a rotating shaft of impellers is directly joined to a motor; and the rotating shaft is supported by magnetic bearings.

ELECTRIC COMPRESSOR

An electric compressor includes a housing, a compression portion that compresses refrigerant, an electric motor that drives the compression portion through a rotary shaft, a circuit board that drives and controls the electric motor, and a connector that is fixed to the housing and configured to electrically connect an external power source to the circuit board. The connector includes a first terminal portion extending in an axial direction of the rotary shaft and a second terminal portion extending in a radial direction of the housing and having a connecting portion through which the first terminal portion and the second terminal portion are connected to each other. The second terminal portion is adapted to elastically hold the first terminal portion at the connecting portion in such a manner as to permit the first terminal portion to move relative to the second terminal portion in the axial direction of the rotary shaft. 1. An electric compressor comprising:a housing;a compression portion that is disposed in the housing and compresses refrigerant;an electric motor that is disposed in the housing, has a rotary shaft, and drives the compression portion through the rotary shaft;a circuit board that is disposed in the housing and drives and controls the electric motor; anda connector that is fixed to the housing and configured to electrically connect an external power source to the circuit board, whereinthe connector includes a first terminal portion extending in an axial direction of the rotary shaft and a second terminal portion extending in a radial direction of the housing and having a connecting portion through which the first terminal portion and the second terminal portion are connected to each other, andthe second terminal portion is adapted to elastically hold the first terminal portion at the connecting portion in such a manner as to permit the first terminal portion to move relative to the second terminal portion in the axial direction of the rotary shaft.2. ...

POWER GENERATION SYSTEM AND METHOD

A method is disclosed for generating and distributing electric power for localized use. The method entails providing an enclosed building having an air conditioning and ventilation unit for supplying cooled air within the building, the unit including a closed loop circuit configured to operate a closed loop refrigeration cycle, including a compressor operable to compress a working fluid of the closed loop circuit. The method further includes engaging an internal combustion engine with the compressor and operating the internal combustion engine to drive the compressor, thereby transferring energy to the refrigeration cycle. The method may also involve engaging an electric motor with the compressor and operating the electric motor to drive the compressor, thereby transferring energy to the refrigeration cycle. 1. A method of generating and distributing electric power to meet localized demand , said method comprising:providing a local environment;engaging an internal combustion engine with equipment serving the local environment; andoperating the internal combustion engine to apply mechanical energy to drive the equipment serving the local environment.2. The method of claim 1 , further comprising:engaging an electric motor generator unit with the equipment serving the local environment; andoperating the electric motor generator unit to drive the equipment serving the local environment.3. The method of claim 2 , further comprising:before engaging the electric motor generator unit, disengaging the internal combustion engine from the equipment.4. The method of claim 2 , further comprising:selectively engaging one of the internal combustion engine and electric motor generator unit to drive the equipment.5. The method of claim 1 , wherein operating the internal combustion engine generates heat claim 1 , the method further comprising:communicating heat generated by the internal combustion engine to the local environment.6. The method of claim 5 , wherein communicating heat ...