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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Применить Всего найдено 5106. Отображено 100.

16-02-2012 дата публикации

Screw-type vacuum pump

Номер: US20120039737A1

Автор: Magnus Janicki, Peter Birch, Robert Jenkins, Roland Müller, Wolfgang Giebmanns

Принадлежит: OERLIKON LEYBOLD VACUUM GmbH

A screw vacuum pump, in particular for compression against atmospheric pressure, comprises a pump housing defining a suction chamber. Two meshing screw rotors are arranged in the suction chamber. Further, an overpressure outlet provided, which comprises an overpressure opening in a side wall of the suction chamber. Further, an overpressure valve is arranged in the overpressure outlet. The width (b) of the overpressure opening in the longitudinal direction of the screw rotors is smaller than or equal to a tooth width (B) of the screw rotors.

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Номер записи: 1

07-03-2013 дата публикации

Hermetic electric compressor

Номер: US20130057120A1

Автор: Masanari Uno, Yogo Takasu, Yoshiyuki Kimata

Принадлежит: Mitsubishi Heavy Industries Ltd

An object is to provide a hermetic electric compressor that can simplify the installation structure of an internal protector and improve the ease-of-assembly thereof. In a hermetic electric compressor having a compressor and an electric motor ( 10 ) built into a sealed housing ( 2 ), the electric motor ( 10 ) includes a stator ( 8 ) to which plastic insulating bobbins ( 30 ) having flanges ( 30 B, 30 C) on an inner and outer circumferences of a plurality of tooth parts of a stator core are fitted and around which a stator winding wire ( 8 A) is wound in concentrated winding around the plastic insulating bobbins ( 30 ), and an internal protector ( 29 ) for electric-motor protection is latched between the inner and outer circumferential flanges ( 30 B, 30 C) of the plastic insulating bobbins ( 30 ) by being urged against the stator winding wire ( 8 A).

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Номер записи: 2

02-05-2013 дата публикации

SCROLL COMPRESSOR

Номер: US20130108496A1

Автор: Iida Noboru, Karino Tsuyoshi, Nakai Hiroaki, Ohno Ryuichi, Oyagi Shingo, Yoshida Hirofumi

Принадлежит: Panasonic Corporation

A scroll compressor employs therein a refrigerant having a small global warming potential and a small ozone depletion potential and mainly comprising hydrofluoroolefin having a carbon-carbon double bond. A stationary scroll has and end plate and a discharge port defined in the end plate at a central portion thereof so as to open into a discharge chamber. The stationary scroll also has a bypass hole defined in the end plate to allow a plurality of compression chambers to communicate with the discharge chamber before the compression chambers communicate with the discharge port. A check valve is provided on the bypass hole to allow the refrigerant to flow from the compression chambers to the discharge chamber. This construction can restrain a baneful influence on the global environment, reduce a temperature increase caused by excessive compression, and restrain decomposition of the refrigerant even in long-term use. 1. A scroll compressor employing therein a single-component refrigerant mainly comprising hydrofluoroolefin having a carbon-carbon double bond or a mixture refrigerant containing this refrigerant , the scroll compressor comprising:a stationary scroll having a stationary end plate and a stationary scroll wrap rising up from the stationary end plate, the stationary end plate having a discharge port defined therein at a central portion thereof so as to open into a discharge chamber; andan orbiting scroll having an orbiting end plate and an orbiting scroll wrap rising up from the orbiting end plate, the orbiting scroll being held in engagement with the stationary scroll to define a plurality of compression chambers therebetween, whereinthe stationary end plate has a bypass hole defined therein to allow the compression chambers to communicate with the discharge chamber before the compression chambers communicate with the discharge port, anda check valve is provided on the bypass hole to allow the refrigerant to flow from the compression chambers to the discharge ...

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Номер записи: 3

23-05-2013 дата публикации

Robust electric screw compressor blocked air line detection via motor current monitoring

Номер: US20130129527A1

Автор: Marv Hamdan

Принадлежит: BENDIX COMMERCIAL VEHICLE SYSTEMS LLC

Systems and methods for detecting a blocked air discharge line of an air compressor are described, which include monitoring motor current (IMTR) drawn by a compressor motor, and calculating a three-point moving average for a steady state current drawn by the compressor motor upon the motor reaching steady state (nominal) operating speed. After expiration of a predetermined time period T 1 that commences upon the compressor motor reaching steady state speed, a determination is made regarding whether a difference between a current drawn by the compressor motor and the three-point moving average has exceeded a predetermined current value I 2 and is consistent with a current profile indicative of a blocked air line. If a blocked air line is detected, a compressor shut-off command is generated and transmitted to the compressor motor to shut the compressor motor off prior to opening of a safety valve on the compressor.

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Номер записи: 4

20-06-2013 дата публикации

Compressor protection and diagnostic system

Номер: US20130156607A1

Автор: Nagaraj Jayanth

Принадлежит: Emerson Climate Technologies Inc

A compressor diagnostic device is provided and includes at least one of a temperature sensor and a current sensor. The current sensor measures a first current flow through a motor of a refrigerant compressor. The temperature sensor is disposed within and sensing a temperature of a measurement region of an electrical conductor that is configured to close and open to allow and prevent current flow to the motor, respectively. The compressor diagnostic device also includes a controller in communication with the at least one of the current sensor and the temperature sensor. The controller is operable to control the electrical conductor based on a comparison of a second current flow through the motor and a maximum current.

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Номер записи: 5

11-07-2013 дата публикации

System and method for compressor motor protection

Номер: US20130176649A1

Автор: Frank S. Wallis, Joseph James Rozsnaki

Принадлежит: Emerson Climate Technologies Inc

A system includes a refrigerant compressor including an electric motor, a current sensor that measures current flow to the electric motor, a switching device configured to close and open to allow and prevent current flow to the electric motor, respectively, a maximum continuous current (MCC) device that includes a resistance corresponding to a maximum continuous current for the electric motor, and a motor protection module. The motor protection module communicates with the MCC device, the current sensor, and the switching device and determines a first MCC value for the electric motor as a function of the resistance of the MCC device. The motor protection module also selectively sets a predetermined MCC to the first MCC and controls the switching device based on a comparison of the current flow to the electric motor and the predetermined MCC.

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Номер записи: 6

25-07-2013 дата публикации

DIFFERENTIAL PRESSURE REGULATING VALVE AND MOTOR-DRIVEN COMPRESSOR HAVING DIFFERENTIAL PRESSURE REGULATING VALVE

Номер: US20130189143A1

Автор: GENNAMI Hiroyuki, INAGAKI Tomoyoshi, KUROKI Kazuhiro, TSUBAI Shinji, YAMASHITA Takuro, YOKOI Kenji

Принадлежит: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI

A differential pressure regulating valve is disposed in a fluid passage. The differential pressure regulating valve includes a valve chamber, a valve hole, a valve body, a support member and an urging member. The valve chamber is formed in the fluid passage and having a cylindrical shape. The valve hole is formed in the fluid passage as an opening which communicates with the valve chamber. The valve body is disposed in the valve chamber and adapted to open and close the valve hole. The support member is fixedly mounted to the valve chamber and extending across flowing direction of the fluid in the valve chamber. The support member has a communication passage for fluid communication between a first valve chamber and a second valve chamber. The urging member is disposed between the support member and the valve body for urging the valve body toward the valve hole. 1. A differential pressure regulating valve disposed in a fluid passage for fluid flowing through a compressor , the differential pressure regulating valve comprising:a valve chamber formed in the fluid passage and having a cylindrical shape;a valve hole formed in the fluid passage as an opening which communicates with the valve chamber;a valve body disposed in the valve chamber and adapted to open and close the valve hole;a support member fixedly mounted to the valve chamber and extending across flowing direction of the fluid in the valve chamber, the support member having a communication passage for fluid communication between a first valve chamber formed on the valve body side of the support member in the valve chamber and a second valve chamber formed on the opposite side of the support member in the valve chamber, at least a part of the communication passage opened at uniformly spaced intervals to the outer periphery of the support member on the first valve chamber side; andan urging member disposed between the support member and the valve body for urging the valve body toward the valve hole, the urging ...

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Номер записи: 7

15-08-2013 дата публикации

Pump

Номер: US20130209222A1

Автор: Nigel Schofield

Принадлежит: Edwards Ltd

The present invention relates to a multi-stage vacuum pump having a plurality of compression stages 12, 14, 16, 18 20 and a booster stage 22. The pump 10 is arranged to pump a chamber 24. The pumping stages include respective rotors supported for rotation on one or more common drive shafts 26. A recirculation valve 28 is associated with the booster stage 22 for selective recirculation of pumped fluid from an outlet 32 to an inlet 30 of the booster stage above a predetermined pressure.

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Номер записи: 8

22-08-2013 дата публикации

VOLUME RATIO CONTROL SYSTEM AND METHOD

Номер: US20130216414A1

Автор: Comstock Angela Marie, JR. Paul, Kopko William L., Nemit

Принадлежит: Johnson Controls Technology Company

A system and method for controlling the volume ratio of a compressor is provided. The system can use a port () or ports in a rotor cylinder to bypass vapor from the compression chamber to the discharge passage of the compressor. A control valve () can be used to open or close the port or ports to obtain different volume ratios in the compressor. The control valve () can be moved or adjusted by one or more valves that control a flow of fluid to the valve. A control algorithm can be used to control the one or more valves to move the control valve to obtain different volume ratios from the compressor. The control algorithm can control the one or more valves in response to operating parameters associated with the compressor. 1. (canceled)2. 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;a port positioned in the compression mechanism to bypass a portion of the vapor in the compression mechanism to the discharge passage;a valve positioned near the port to control vapor flow through the port;the valve having a first position to permit a first vapor flow from the compression mechanism to the discharge passage, a second position to permit a second vapor flow from the compression mechanism to the discharge passage and a third position to prevent vapor flow from the compression mechanism to the discharge passage;the compressor having a first volume ratio in response to the valve being in the first position, a second volume ratio in response to the valve being in the second position and a third volume ratio in response to the valve being in the third position, the first volume ratio being less than the second volume ratio and the the second volume ratio being less than the third volume ratio;at least one solenoid valve, the at least one solenoid valve being positioned to control a flow of fluid to the ...

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Номер записи: 9

19-09-2013 дата публикации

Variable Speed Compressor Protection System And Method

Номер: US20130240043A1

Автор: PHAM Hung M., SEIBEL Stephen M.

Принадлежит: EMERSON CLIMATE TECHNOLOGIES, INC.

A system and method for a compressor includes a compressor connected to a condenser, a discharge line temperature sensor that outputs a discharge line temperature signal corresponding to a discharge line temperature of refrigerant leaving the compressor, and a control module connected to the discharge line temperature sensor. The control module determines a saturated condenser temperature, calculates a discharge superheat temperature based on the saturated condenser temperature and the discharge line temperature, and monitors a flood back condition of the compressor by comparing the discharge superheat temperature with a predetermined threshold. The control module increases a speed of the compressor or decreases an opening of an expansion valve associated with the compressor when the discharge superheat temperature is less than or equal to the predetermined threshold. 1. A system comprising:a compressor connected to a condenser;a discharge line temperature sensor that outputs a discharge line temperature signal corresponding to a discharge line temperature of refrigerant leaving the compressor;a control module connected to the discharge line temperature sensor, said control module determining a saturated condenser temperature, calculating a discharge superheat temperature based on the saturated condenser temperature and the discharge line temperature, monitoring a flood back condition of the compressor by comparing the discharge superheat temperature with a predetermined threshold, and, when the discharge superheat temperature is less than or equal to the predetermined threshold, increasing a speed of the compressor or decreasing an opening of an expansion valve associated with the compressor.2. The system of wherein the predetermined threshold is thirty degrees Fahrenheit.3. The system of wherein the control module increases the speed of the compressor when the discharge superheat temperature is less than or equal to the predetermined threshold.4. The system of ...

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Номер записи: 10

21-11-2013 дата публикации

Integrated rotary valve

Номер: US20130306173A1

Автор: Edward S. Czechowski, Jeffrey M. Cavarello, Michael A. Nuchereno, Robert M. Kolodziej

Принадлежит: Cameron International Corp

A system in some embodiments includes a machine block comprising features configured to support moving machine components within a lubricating fluid, wherein the machine block includes an integral valve block configured to route the lubricating fluid through a first filter without a second filter and configured to route the lubricating fluid through the second filter without the first filter. Further embodiments include a method that includes switching circulation of a lubricant between a first filter and a second filter in response to an angular position of a valve disposed in a valve block integral to a machine block having moving components lubricated by the lubricant.

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Номер записи: 11

21-11-2013 дата публикации

Scroll refrigeration compressor

Номер: US20130309118A1

Автор: Dominique Gross, Jean-Francois LE COAT, Patrick Jallat, Pierre Ginies, Stephane Watts

Принадлежит: Danfoss Commercial Compressors SA

The scroll compressor includes stationary and moving scrolls each including a scroll plate provided with a spiral wrap, the spiral wraps defining the variable-volume compression chambers, a separating plate mounted on the scroll plate of the stationary scroll and defining with the latter a first intermediate volume, and a delivery chamber defined by the separating plate and the sealed casing. The compressor includes a bypass passage arranged to communicate the first intermediate volume with an intermediate compression chamber, a flow passage arranged to communicate the first intermediate volume with the delivery chamber, and a bypass valve associated with the flow passage, each bypass valve associated with a flow passage mounted on the surface of the separating plate turned toward the delivery chamber and movable between closing and opening positions for closing and opening the flow passage.

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Номер записи: 12

30-01-2014 дата публикации

COMPRESSOR PROTECTION MODULE

Номер: US20140029178A1

Автор: Barnett Kenneth Ray, JR. Edward J., TRUDEAU

Принадлежит:

An electronic device is provided that may include a housing and an electronic component disposed within the housing. The housing may include a plug configured to engage a terminal assembly extending from a compressor shell and facilitate electrical communication between the plug and the terminal assembly. An exterior surface of the housing may include one or more receptacles extending therethrough in electrical communication with the electronic component. 1. An electronic device including an electronic component disposed within a housing , the housing having a plug configured to engage a terminal assembly extending from a compressor shell and facilitate electrical communication between the plug and the terminal assembly , an exterior surface of the housing including one or more receptacles extending therethrough in electrical communication with the electronic component.2. The electronic device of claim 1 , wherein the plug includes a plug body and a plurality of resiliently flexible tabs configured to snap into engagement with corresponding apertures in a fence of the terminal assembly.3. The electronic device of claim 2 , wherein the plug body includes a plurality of apertures configured to receive conductor pins of the terminal assembly.4. The electronic device of claim 1 , wherein the housing includes a base and a removable cap.5. The electronic device of claim 4 , wherein the cap includes a plurality of resiliently flexible tabs that snap into engagement with the base.6. The electronic device of claim 1 , wherein the one or more receptacles is in electrical communication with a display device disposed remotely from the housing.7. The electronic device of claim 1 , wherein the housing is adapted to selectively engage a first cap having an integral display device and a second cap that is in electrical communication with a remote display device.8. A set of components comprising:a base adapted to be mounted to a compressor and including a first engagement feature ...

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Номер записи: 13

06-03-2014 дата публикации

Capacity Modulated Scroll Compressor

Номер: US20140064999A1

Автор: Sunil Annappa Magadum, Vinayak Madanrao Juge

Принадлежит: Emerson Climate Technologies Inc

A compressor including a housing defining a suction pressure region and a discharge pressure region includes first and second scroll members forming compression pockets. A first chamber located on the first end plate of the first scroll member includes first and second passages and a first aperture extending therethrough and in communication with the first chamber. The first aperture provides communication between a compression pocket and the first chamber. A modulation assembly is located in the first chamber and includes a heater and a thermal valve. The valve is displaceable from a first position that isolates the first passage from the second passage and a second position that permits communication between the first and second passages. The valve is displaced as a result of a temperature change provided by the heater.

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Номер записи: 14

03-04-2014 дата публикации

MOTOR-DRIVEN COMPRESSOR AND AIR CONDITONER

Номер: US20140090412A1

Автор: EGAWA Satoru, FUKASAKU Hiroshi, NAJIMA Kazuki

Принадлежит: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI

A motor-driven compressor includes a housing assembly, a compression mechanism, an electric motor, a discharge port, an outlet, a discharge passage, discharge valve and a valve device. The compression mechanism is accommodated in the housing assembly. The electric motor drives the compression mechanism. The discharge chamber is formed in the housing assembly. The discharge port is formed in the housing assembly for communication between the discharge chamber and the compression mechanism. The outlet is formed in the housing assembly for communication with an external circuit. The discharge passage is formed in the housing assembly for communication between the discharge chamber and the outlet. The discharge valve is disposed in the discharge chamber for opening and closing the discharge port. The valve device is configured to adjust an opening of the discharge passage. 1. A motor-driven compressor comprising:a housing assembly;a compression mechanism accommodated in the housing assembly;an electric motor driving the compression mechanism;a discharge chamber formed in the housing assembly;a discharge port formed in the housing assembly for communication between the discharge chamber and the compression mechanism;an outlet formed in the housing assembly for communication with an external circuit;a discharge passage formed in the housing assembly for communication between the discharge chamber and the outlet;a discharge valve disposed in the discharge chamber for opening and closing the discharge port; anda valve device configured to adjust an opening of the discharge passage.2. The motor-driven compressor according to claim 1 , wherein the motor driven compressor further includes an inverter configured to control an operation of the electric motor claim 1 , the valve device is electrically connected to the inverter and the valve device is controlled in accordance with a value of current output from the inverter.3. The motor-driven compressor according to claim 2 , ...

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Номер записи: 15

10-04-2014 дата публикации

ROTARY COMPRESSOR

Номер: US20140099218A1

Автор: HIWATA AKIRA, Ogata Takeshi

Принадлежит: Panasonic Corporation

A rotary compressor of the present invention includes a compression mechanism , a motor , a suction path , a communication passage and an on-off valve as a control mechanism . The rotary compressor further includes an interior space , a first check valve and a second check valve . If the on-off valve opens, a volume of the operation chamber is reduced and with this reduction in the volume, the first check valve opens. Pressure in the operation chamber does not rise. At this time, the rotary compressor is operated with substantially zero suction volume. If the on-off valve is closed, the rotary compressor is operated with a normal suction volume. 1. A rotary compressor in which a compression mechanism comprises:a cylinder;a piston disposed in the cylinder;a frame which rotatably holds a shaft, which covers both upper and lower sides of the cylinder, and which forms an operation chamber between the frame and an inner peripheral surface of the cylinder; anda vane which partitions the operation chamber into a suction chamber and a compression-discharge chamber, and in whicha motor operates the piston through the shaft, whereinthe rotary compressor comprises:a hermetic container in which the compression mechanism and the motor are accommodated;a suction path for guiding working fluid to be compressed to the suction chamber;a discharge port which is provided in the frame, and through which compressed working fluid flows out from the operation chamber;an interior space which is partitioned from an interior of the hermetic container and the operation chamber;a communication passage between the interior space and the suction path;a first passage between the discharge port and the interior space;a first check valve which prohibits working fluid passing through the first passage from returning from the interior space to the discharge port;a second passage between the interior space and the interior of the hermetic container;a second check valve which prohibits working fluid ...

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Номер записи: 16

10-04-2014 дата публикации

PUMP

Номер: US20140099225A1

Автор: Denny Mark Joseph

Принадлежит: BP Exploration Operating Company Limited

The invention provides a pump comprising a pump inlet, a pump outlet, at least two threaded rotors and a pressure controlled valve, the pressure controlled valve being capable of controlling re-circulation of fluid from the pump outlet to the pump inlet. The pressure controlled valve can be a control valve. The invention also provides a multiple stage pump assembly comprising at least two pumps arranged in series, wherein at least one of the pumps is the aforementioned pump. 114-. (canceled)15. A multiple stage pump assembly comprising at least two pumps arranged in series , wherein at least the second and each subsequent pump comprises a pump inlet , a pump outlet , at least two threaded rotors and a pressure controlled valve , the pressure controlled valve being capable of controlling re-circulation of fluid from the pump outlet to the pump inlet.16. The assembly of claim 15 , in which the pressure controlled valve is adapted to control the rate of fluid flow there-through in proportion to the gas to liquid ratio of a fluid being pumped by the pump in use.17. The assembly of claim 15 , in which the pressure controlled valve is a control valve.18. The assembly of claim 15 , further comprising a conduit connecting the pump outlet to the pump inlet and through which re-circulated fluid can flow in use.19. The assembly of claim 18 , in which the pressure controlled valve is located wholly or partly within the conduit or adjacent one or other end of the conduit.20. The assembly of claim 18 , further comprising a recess in the pump outlet to preferentially allow claim 18 , in use claim 18 , liquid rather than gas to flow from an enclosure in which the threaded rotors are located to the conduit.21. The assembly of claim 15 , in which the pressure controlled valve is one which responds to the absolute pressure difference between the pump outlet and the pump inlet such that the valve permits fluid to flow there-through when the absolute pressure difference between the pump ...

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Номер записи: 17

01-01-2015 дата публикации

CAPACITY-MODULATED SCROLL COMPRESSOR

Номер: US20150004039A1

Автор: DOEPKER Roy

Принадлежит:

A compressor may include a shell defining an internal volume containing compressed working fluid and first and second scrolls disposed within the internal volume. The first scroll may include a first spiral wrap. The second scroll may include a second spiral wrap, a suction inlet opening and a capacity-modulation aperture. The second spiral wrap may engage the first spiral wrap to define a pocket therebetween. The suction inlet opening may be sealed off from the internal volume. The capacity-modulation aperture may receive a valve member that is movable between a first position allowing leakage of fluid from the pocket to the suction inlet opening and a second position restricting leakage of fluid from the pocket. 1. A compressor comprising:a shell defining an internal volume;a first scroll disposed within said internal volume and including a first spiral wrap;a second scroll disposed within said internal volume and including a second spiral wrap engaged with said first spiral wrap to form a pocket between said first and second spiral wraps, said second scroll including a suction inlet opening, a discharge passage and a capacity-modulation aperture, said suction inlet opening receiving said fluid at a first pressure and being isolated from said internal volume, said discharge passage discharging said fluid to said internal volume at a second pressure that is higher than said first pressure; anda valve member at least partially disposed within said capacity-modulation aperture and movable between a first position in which said valve member restricts fluid to flow around a tip of said first spiral wrap to restrict fluid communication between said suction inlet opening and said pocket and a second position in which said valve member allows fluid-flow around said tip of said first spiral wrap to provide fluid communication between said suction inlet opening and said pocket.2. The compressor of claim 1 , wherein an end of said valve member is exposed to fluid within a ...

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Номер записи: 18

07-01-2016 дата публикации

AIR COMPRESSION DEVICE

Номер: US20160003246A1

Автор: KUROMITSU Masaru, MIYAUCHI Tatsuo, MIZUFUNE Toru

Принадлежит:

An air compression device is provided with a rotary compressor, a discharge flow channel connected to a discharge portion of the compressor, a release flow channel disposed to be connectable to the discharge flow channel, and an operation control unit configured to perform a release operation of releasing a part or all of compressed air remaining in the discharge flow channel through the release flow channel when the operation control unit controls to stop the compressor. 1. An air compression device , comprising:a rotary compressor;a discharge flow channel connected to a discharge portion of the compressor;a release flow channel disposed to be connectable to the discharge flow channel; andan operation control unit configured to perform a release operation of releasing a part or all of compressed air remaining in the discharge flow channel through the release flow channel when the operation control unit controls to stop the compressor.2. The air compression device according to claim 1 , whereinwhen the release operation is performed, the operation control unit controls to start releasing the compressed air while driving the compressor, and controls to stop the compressor after a predetermined time elapses.3. The air compression device according to claim 1 , whereinwhen the release operation is performed, the operation control unit controls to start releasing the compressed air while driving the compressor, and controls to stop the compressor when a condition for finishing the release operation is satisfied.4. The air compression device according to claim 1 , further comprising:an opening/closing mechanism which connects or disconnects the discharge flow channel to or from the release flow channel, whereinthe operation control unit is configured to bring the opening/closing mechanism to a disconnected state when an ordinary operation of generating compressed air is performed, and to bring the opening/closing mechanism to a connected state before the compressor is ...

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Номер записи: 19

02-01-2020 дата публикации

ACTIVE CLEARANCE MANAGEMENT IN SCREW COMPRESSOR

Номер: US20200003214A1

Автор: Johnson Jay H., LOTSPAIH Steven

Принадлежит:

A compressor includes a housing defining a working chamber. The housing further includes a bore and an endplate disposed toward a discharge end. The compressor further includes a rotor having helical threads, the rotor being configured to be housed in the bore, a rotor clearance, a controllable bearing supporting the rotor, and a controller configured to control the controllable bearing such that the controllable bearing moves the rotor in a manner to reduce and/or enlarge the rotor clearance. 110-. (canceled)11. An HVAC system , comprising ,a fluidically connected fluid circuit including,a condenser,an expansion device disposed downstream of the condenser,an evaporator disposed downstream of the expansion device, a housing,', 'two bores within the housing,', 'an endplate disposed toward a high pressure end,', 'two rotors having intermeshing helical threads, the rotors being configured to be housed in the bores,', 'a rotor-to-rotor clearance defined between the two rotors,', 'a rotor-to-bore clearance defined between one of the rotors and an interior surface of the bores,', 'a rotor to endplate clearance defined between one of the rotors and the endplate,', 'a controllable bearing supporting one of the two rotors, and', 'a controller configured to control the controllable bearing such that the controllable bearing moves the one of the two rotors in a manner to reduce or enlarge the rotor-to-rotor, rotor-to-bore, or rotor to endplate clearances., 'a compressor disposed downstream of the evaporator and upstream of the condenser, the compressor including,'}12. The HVAC system according to claim 11 , wherein the housing further includes claim 11 ,an intake port disposed toward an opposite end from the discharge end,a discharge port disposed toward the discharge end, anda compression chamber defined by the helical threads of the two rotors and an interior surface of the housing, the compression chamber being configured to move from the intake port to the discharge port ...

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Номер записи: 20

12-01-2017 дата публикации

VANE PUMPS

Номер: US20170009768A1

Автор: SR. Craig T., Stambaugh

Принадлежит:

A vane pump includes a liner defining a cammed inner surface, a rotor rotatably disposed within the liner that has a plurality of vane slots, and a plurality of vanes slidably disposed within vane slots of the rotor and configured to extend away from the rotor and contact the cammed inner surface of the liner. The plurality of vanes include at least one sentinel vane that is configured to allow detection of wear on the sentinel vane. 1. A vane pump , comprising:a liner defining a cammed inner surface;a rotor rotatably disposed within the liner and including a plurality of vane slots; anda plurality of vanes slidably disposed within vane slots of the rotor and configured to extend away from the rotor and contact the cammed inner surface of the liner, wherein the plurality of vanes include at least one sentinel vane that is configured to allow detection of wear on the sentinel vane.2. The vane pump of claim 1 , wherein the sentinel vane includes a base portion that is larger than the vane slot of the rotor such that after the sentinel vane wears a predetermined amount claim 1 , the base portion prevents the sentinel vane from extending further from the rotor such that a gap separates a sentinel vane tip and a portion of the cammed inner surface.3. The vane pump of claim 2 , wherein the portion of the cammed inner surface where the gap is created includes a constant radius section.4. The vane pump of claim 2 , wherein the at least one sentinel vane includes a plurality of symmetrically located sentinel vanes.5. The vane pump of claim 4 , wherein the plurality of symmetrically located sentinel vanes includes two sentinel vanes spaced 180 degrees circumferentially from each other.6. The vane pump of claim 4 , wherein the plurality of symmetrically located sentinel vanes are spaced circumferentially apart 360/N degrees claim 4 , wherein N is the total number of sentinel vanes.7. The vane pump of claim 2 , further comprising a vibration sensor operatively connected to the ...

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Номер записи: 21

27-01-2022 дата публикации

HIGH PRESSURE SCROLL COMPRESSOR

Номер: US20220025884A1

Автор: Bae Moo Seong, Cho Yang Hee

Принадлежит: SAMSUNG ELECTRONICS CO., LTD.

Disclosed herein is a high-pressure scroll compressor, in response to a discharged refrigerant flowing into a back pressure chamber, capable of directly discharging the refrigerant to a space inside a main body, and capable of maintaining an intermediate pressure of the back pressure chamber to be less than a discharge pressure of the refrigerant by separately providing a discharge flow path in the back pressure chamber. 1. A high-pressure scroll compressor comprising:a main body;a fixed scroll fixed inside the main body and comprising a discharge port through which a high-pressure refrigerant is discharged;an orbiting scroll engaged with the fixed scroll to perform a relative orbiting motion, and forming a compression chamber with the fixed scroll;a main frame fixed inside the main body so as to be located under the orbiting scroll and comprising a back pressure chamber filled with an intermediate-pressure refrigerant;a back pressure hole provided in the orbiting scroll and provided to allow the compression chamber to communicate with the back pressure chamber;a bypass portion provided in plural on an upper surface of the fixed scroll and configured to selectively bypass the refrigerant of the compression chamber to a space inside the main body; anda back pressure chamber discharge portion configured to selectively discharge the refrigerant of the back pressure chamber to the space inside the main body.2. The high-pressure scroll compressor of claim 1 , whereinthe back pressure chamber discharge portion comprises a back pressure chamber discharge flow path provided in the fixed scroll to discharge the refrigerant inside the back pressure chamber into the space inside the main body, and a back pressure chamber discharge valve configured to selectively open and close the back pressure chamber discharge flow path.3. The high-pressure scroll compressor of claim 2 , whereinthe back pressure chamber discharge flow path is provided to pass through the fixed scroll from an ...

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Номер записи: 22

27-01-2022 дата публикации

VARIABLE CAPACITY COMPRESSOR

Номер: US20220025887A1

Автор: LIU Chunhui, PAN Jin, WANG Yanzhen

Принадлежит: SHANGHAI HIGHLY ELECTRICAL APPLIANCES CO., LTD.

A variable capacity compressor is provided, including: two cylinders and a middle plate; at least one flow channel provided in the middle plate, wherein one end of the flow channel is connected to an exhaust chamber of any one of the two cylinders, the other end is connected to a suction chamber of the other one of the two cylinders. In present disclosure, by setting a flow channel in the middle plate of the variable capacity compressor, the exhaust chamber of one cylinder is connected to the suction chamber of the other cylinder. When the flow channel is completely closed, the two cylinders operate independently; when the flow channel is opened, the refrigerant in the exhaust chamber flows into the suction chamber through the flow channel, that is, the upper cylinders and the lower cylinder are connected to each other, which can adjust the capacity of the compressor. 1. A variable capacity compressor , comprising:two cylinders;a middle plate, separating the two cylinders, and at least one flow channel provided in the middle plate, wherein one end of the flow channel is connected to an exhaust chamber of any one of the two cylinders, the other end of the flow channel is connected to a suction chamber of the other one of the two cylinders; each flow channel is provided with a flow control component for adjusting flow rate of refrigerant flowing through the flow channel.2. The variable capacity compressor of claim 1 , wherein the flow control component comprises a first slider provided in the middle plate claim 1 , and the first slider is capable of moving along a radial direction of the middle plate to change an effective flow area of the flow channel claim 1 , which adjusts the flow rate of the refrigerant flowing through the flow channel.3. The variable capacity compressor of claim 2 , wherein the first slider is driven by a solenoid valve claim 2 , so that the first slider moves along the radial direction of the middle plate.4. The variable capacity compressor of ...

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Номер записи: 23

11-01-2018 дата публикации

HYDRAULIC PUMP AND RESPECTIVE MULTIFUNCTION VALVE

Номер: US20180010598A1

Автор: Andreis Francesco, Copelli Stefano, Zuppi Roberto

Принадлежит:

A hydraulic pump is described, comprising at least one inlet duct for a fluid, at least one outlet duct for the fluid and at least one pumping unit interposed between the inlet and outlet ducts. At least one multifunction valve is interposed between the inlet duct, upstream of the pumping unit, and the outlet duct, downstream of the pumping unit, which valve is configured to divert the flow of fluid from the inlet duct to the outlet duct without the fluid flowing into the pumping unit. The multifunction valve comprises a valve body that defines an inner bypass channel in which a shutter element is axially movable, an actuator member operatively associated with the shutter element and configured to move it from a closing position to an opening position of the bypass channel, and an elastic contrast element operatively associated with the shutter element and configured to keep it in the first closing position of the bypass channel when such shutter element is not actuated by the actuator member. The actuator member consists of a bias spring manufactured with a shape memory alloy, configured to move the shutter element from the first closing position to the second opening position of the bypass channel when a predefined temperature value is reached. 210262624242626. The hydraulic pump () according to claim 1 , characterized in that the shutter element () is mushroom-shaped claim 1 , with an inner portion (A) configured to be introduced into the bypass channel () and to occlude selectively said bypass channel () claim 1 , and an outer portion (B) having a larger cross section than the cross section of the inner portion (A).31030302612. The hydraulic pump () according to claim 2 , characterized in that the elastic contrast element () consists of a bias spring operating by traction claim 2 , preloaded with a predefined force claim 2 , said bias contrast spring () being configured to control the opening of the shutter element () when the pressure of the fluid circulating ...

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Номер записи: 24

14-01-2021 дата публикации

Compressor Having Capacity Modulation

Номер: US20210010472A1

Автор: James W. MCBEAN, Joseph B. Burton, Phillip M. Moore, Robert V. Eyink

Принадлежит: Emerson Climate Technologies Inc

A compressor may include a shell assembly, first and second scrolls, a piston, and a piston-retention member. The piston engages the first scroll and may be partially received within a recess defined by the shell assembly. The piston and the shell assembly may cooperate to define a pressure chamber. The pressure chamber may be in selective fluid communication with a source of working fluid to control movement of the piston relative to the shell assembly. The piston-retention member may engage the piston and a rotationally fixed structure. The piston-retention member allows rotation of the piston relative to the first scroll in a first rotational direction and restricts rotation of the piston relative to the first scroll in a second rotational direction.

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Номер записи: 25

09-01-2020 дата публикации

Gas Compressor

Номер: US20200011324A1

Автор: Ryusuke Oshiro

Принадлежит: Hitachi Industrial Equipment Systems Co Ltd

To prevent generation of drain reliably without depending on a difference in ambient temperature where a compressor is installed. Provided is a gas compressor: having a compressor main body compressing a gas, a drive source driving the compressor main body, a controller controlling the rotation speed of the drive source according to the discharge pressure of the compressor main body, and a temperature detector detecting the temperature of a discharge gas of the compressor main body; and performing no-load operation with the rotation speed of the drive source as a lower limit rotation speed when the discharge pressure reaches an upper limit pressure higher than a set pressure. When detecting that the temperature detected by the temperature detector is equal to or lower than a predetermined temperature during the no-load operation, the controller causes the lower limit rotation speed of the drive source to a lower limit rotation speed at which the temperature of the discharge gas is higher than the predetermined temperature and which is higher than a lower limit rotation speed when the detected temperature is higher than the predetermined temperature.

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Номер записи: 26

03-02-2022 дата публикации

Compressor Having Capacity Modulation

Номер: US20220034317A1

Автор: Burton Joseph B., EYINK Robert V., MCBEAN James W., MOORE Phillip M.

Принадлежит: EMERSON CLIMATE TECHNOLOGIES, INC.

A compressor may include a shell assembly, a first scroll, a second scroll, a piston, and a piston-retention member. The piston engages the first scroll and may be partially received within a recess defined by the shell assembly. The piston and the shell assembly may cooperate to define a pressure chamber. The pressure chamber may be in selective fluid communication with a source of working fluid to control movement of the piston relative to the shell assembly. The piston-retention member may be mounted to the piston and selectively engage a rotationally fixed structure. The piston-retention member allows rotation of the piston relative to the first scroll in a first rotational direction and restricts rotation of the piston relative to the first scroll in a second rotational direction. 1. A compressor comprising:a shell assembly defining a discharge chamber;a first scroll disposed within the shell assembly and including a first end plate and a first spiral wrap extending from the first end plate;a second scroll disposed within the shell assembly and including a second end plate and a second spiral wrap extending from the second end plate, the first and second spiral wraps meshing;a piston engaging the first scroll and cooperating with the shell assembly to define a pressure chamber therebetween, wherein the pressure chamber is in selective fluid communication with a first source of working fluid to control movement of the piston relative to the shell assembly; anda piston-retention member mounted to the piston and selectively engaging a rotationally fixed structure, wherein the piston-retention member allows rotation of the piston relative to the first scroll in a first rotational direction and restricts rotation of the piston relative to the first scroll in a second rotational direction that is opposite the first rotational direction.2. The compressor of claim 1 , wherein a spring engages the piston-retention member and the piston claim 1 , and wherein the spring ...

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Номер записи: 27

03-02-2022 дата публикации

Dual-cylinder two-stage variable cpacity compressor

Номер: US20220034320A1

Автор: Chunhui Liu, JIN Pan, Yanzhen Wang

Принадлежит: Shanghai Highly Electrical Appliances Co Ltd

A dual-cylinder two-stage variable capacity compressor is provided, including: a first cylinder, having an exhaust port connected to a first exhaust channel: a second cylinder, wherein the second cylinder is provided with a ventilating slider, and the ventilating slider is provided with a first gas transit channel and a second gas transit channel; wherein, when the ventilating slider is at a first connecting position, the first exhaust channel is connected to a suction channel in a second cylinder when the ventilating slider is at a second connecting position, the first exhaust channel is connected to a second exhaust channel. The compressor of the present disclosure can vary its own capacity, that is, the variation of the compressor's capacity can be realized by arranging a ventilating slider, which will meet the requirements of variation loads of the compressor in different seasons.

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Номер записи: 28

19-01-2017 дата публикации

METHOD AND APPARATUS IN CONNECTION WITH A SCREW COMPRESSOR

Номер: US20170016447A1

Автор: AHOLA Jero, Kosonen Antti

Принадлежит:

the screw compressor with a variable rotational speed of the screw compressor, the rotational speed of the screw compressor having a speed profile in which the rotational speed is changed stepwise such that between stepwise changes the rotational speed of the screw compressor is kept substantially constant for a time period, repeating the speed profile until the pressure of the pressure vessel reaches a set pressure value, determining pressure of the pressure vessel, power consumption of the screw compressor drive and mass flow rate during the pressurising when the rotational speed of the screw compressor is kept substantially constant, calculating energy efficiency of the screw compressor drive as a function of pressure of the pressure vessel and rotational speed of the screw compressor on the on the basis of the determined pressure of the pressure vessel and power consumption of the screw compressor drive. 1. A method of determining operation characteristics of a screw compressor drive comprising a screw compressor driven with a frequency converter , wherein the method comprisespressurising a pressure vessel of the screw compressor with a variable rotational speed of the screw compressor, the rotational speed of the screw compressor having a speed profile in which the rotational speed is changed stepwise such that between stepwise changes the rotational speed of the screw compressor is kept substantially constant for a time period,repeating the speed profile until the pressure of the pressure vessel reaches a set pressure value,determining pressure of the pressure vessel, power consumption of the screw compressor drive and mass flow rate during the pressurising when the rotational speed of the screw compressor is kept substantially constant,calculating energy efficiency of the screw compressor drive as a function of pressure of the pressure vessel and rotational speed of the screw compressor on the on the basis of the determined pressure of the pressure vessel and ...

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Номер записи: 29

21-01-2016 дата публикации

SNAP-IN TEMPERATURE SENSOR FOR SCROLL COMPRESSOR

Номер: US20160017886A1

Автор: Avary Stephen, Cargile William, Hahn Gregory W., Milliff Tracy

Принадлежит:

A temperature sensor on an outer surface of an upper shell at a location is associated with a discharge chamber. The temperature sensor includes electronics molded into an overmolded plastic and includes a spring member. The spring member snaps into a sensor housing connected to the outer surface. 1. A scroll compressor comprising:a housing including a cylindrical lower portion and an upper cover, said upper cover having an outer surface;a scroll compressor pump unit including a first scroll member having a base and a generally spiral wrap extending from its base, and a second scroll member having a base and a generally spiral wrap extending from its base, said wraps of said first and second scroll members interfitting to define a compression chamber, and said first scroll member having a discharge port;an electric motor for driving a drive shaft to rotate and, in turn, cause said second scroll member to orbit relative to said first said scroll member to decrease a volume of said compression chambers such that a refrigerant is entrapped and is driven to communicate with said discharge port;a discharge chamber defined inwardly of said upper cover and communicating with said discharge port; anda temperature sensor connected to said outer surface at a location associated with said discharge chamber, said temperature sensor including a spring member, said spring member snapping into a sensor housing connected to said outer surface.2. The scroll compressor as set forth in claim 1 , wherein said sensor housing and said spring member are metallic.3. The scroll compressor as set forth in claim 1 , wherein said sensor housing has a front opening for receipt of said sensor and such that said sensor can be inserted and removed from said front opening.4. The scroll compressor as set forth in claim 1 , wherein said sensor includes an electronic component in contact with said outer surface.5. The scroll compressor as set forth in claim 4 , wherein said electronic component is a ...

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Номер записи: 30

18-01-2018 дата публикации

SCREW COMPRESSOR

Номер: US20180017058A1

Автор: Miyamura Harunori, Shikano Shigeharu

Принадлежит:

A screw compressor includes a casing, a drive shaft, a screw rotor, a gate rotor, a slide valve, and a slide valve driving mechanism having a hydropneumatic cylinder. The drive shaft has one end supported via a bearing on a bearing holder held by the casing. The other end is coupled to an electric motor. A compression chamber is defined by the gate rotor meshing with a helical groove formed on the screw rotor. The hydropneumatic cylinder is located opposite to the screw rotor with respect to the bearing. The bearing holder has an outer peripheral surface configured as a guide surface guiding a sliding movement of the slide valve. The bearing holder has axial end portions. One of the axial end portions located opposite to the screw rotor constitutes a cylinder tube of the hydropneumatic cylinder to achieve integration of the bearing holder and the hydropneumatic cylinder. 1. A screw compressor comprising:a casing;a drive shaft having one end supported, via a bearing, on a bearing holder held by the casing, and an other end coupled to an electric motor;a screw rotor coupled to the drive shaft;a gate rotor defining a compression chamber in the casing by meshing with a helical groove formed on the screw rotor;a slide valve slidable in an axial direction of the screw rotor and capable of regulating an area of a discharge opening of the compression chamber; anda slide valve driving mechanism including a hydropneumatic cylinder configured to drive the slide valve,the hydropneumatic cylinder being located opposite to the screw rotor with respect to the bearing interposed therebetween, andthe bearing holder having an outer peripheral surface configured as a guide surface guiding a sliding movement of the slide valve,the bearing holder having axial end portions, with one of the axial end portions located opposite to the screw rotor constituting a cylinder tube of the hydropneumatic cylinder, thereby achieving integration of the bearing holder and the hydropneumatic cylinder.2 ...

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Номер записи: 31

18-01-2018 дата публикации

VARIABLE VOLUME RATIO COMPRESSOR

Номер: US20180017060A1

Автор: JR. Paul, Nemit

Принадлежит:

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 ...

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Номер записи: 32

17-01-2019 дата публикации

Variable Speed Compressor Protection System And Method

Номер: US20190017508A1

Автор: PHAM Hung M., SEIBEL Stephen M.

Принадлежит: EMERSON CLIMATE TECHNOLOGIES, INC.

A system and method for a compressor includes a compressor connected to a condenser, a discharge line temperature sensor that outputs a discharge line temperature signal corresponding to a discharge line temperature of refrigerant leaving the compressor, and a control module connected to the discharge line temperature sensor. The control module determines a saturated condenser temperature, calculates a discharge superheat temperature based on the saturated condenser temperature and the discharge line temperature, and monitors a flood back condition of the compressor by comparing the discharge superheat temperature with a predetermined threshold. The control module increases a speed of the compressor when the discharge superheat temperature is less than or equal to the predetermined threshold. 1. A method comprising:determining, with a control module, a saturated condenser temperature of a condenser connected to a compressor;receiving, with the control module, a discharge line temperature signal that corresponds to a discharge line temperature of refrigerant leaving the compressor;calculating, with the control module, a discharge superheat temperature based on the saturated condenser temperature and the discharge line temperature;monitoring, with the control module, a flood back condition of the compressor by comparing the discharge superheat temperature with a predetermined threshold; andincreasing a speed of the compressor, with the control module, when the discharge superheat temperature is less than or equal to the predetermined threshold.2. The method of wherein the predetermined threshold is thirty degrees Fahrenheit.3. The method of wherein the control module increases the speed of the compressor when the discharge superheat temperature is less than or equal to the predetermined threshold.4. The method of further comprising decreasing claim 1 , with the control module claim 1 , an opening of an expansion valve associated with the compressor when the discharge ...

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Номер записи: 33

21-01-2021 дата публикации

Gas Compressor

Номер: US20210017988A1

Автор: Akira Iyozumi, Hideharu Tanaka, Kenji Morita, Masahiko Takano, Masakazu Hase, Shigeyuki Yorikane, Takashi Nakajima, Yoshihiko SAGAWA

Принадлежит: Hitachi Industrial Equipment Systems Co Ltd

A technique is provided that can further reduce power at the time of “unload operation control” in a gas compressor that generates a compressed gas at a set pressure by constant-speed control. The gas compressor includes a compressor main unit, a drive source, an intake throttle valve, a gas release valve, rotation speed converting means, a pressure detecting device that detects a discharge pressure, and a controller that, the relationship between an upper-limit pressure H and a lower-limit pressure L being H>L, carries out opening the intake throttle valve and closing the gas release valve and operating the drive source at a full-load rotation speed until the discharge pressure reaches the upper-limit pressure H. The controller carries out at least one of closing the intake throttle valve and opening the gas release valve to reduce the discharge pressure to within a predetermined range when the discharge pressure reaches the upper-limit pressure H. The controller carries out switching to load operation when the discharge pressure drops to the lower-limit pressure L. In the gas compressor, the controller outputs a command of a lower rotation speed than the full-load rotation speed to the rotation speed converting means when the discharge pressure rises and reaches the upper-limit pressure H. The controller outputs a command of the full-load rotation speed to the rotation speed converting means when the discharge pressure drops and reaches the lower-limit pressure L.

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Номер записи: 34

25-01-2018 дата публикации

NATURAL GAS FUELED VEHICLE

Номер: US20180023516A1

Автор: Cai Mei, DAILLY Anne M., ZHANG Cunman, Zhou Wei

Принадлежит:

A natural gas fueled vehicle, includes a natural gas fueled Internal Combustion Engine (ICE) to provide motive power to the vehicle. A pressurizable tank is disposed on the vehicle to contain a natural gas. A natural gas adsorbent is disposed in the tank. A fuel supply tube is to convey the natural gas to the ICE. A scroll compressor is on the vehicle to receive the natural gas from the tank and to deliver a first mixture of compressed natural gas and an oil to a gas and oil separator. The gas and oil separator is to receive the first mixture of the compressed natural gas and the oil from the scroll compressor and to separate the oil from the compressed natural gas and to deliver the compressed natural gas to the fuel supply tube substantially free from the oil. 1. A natural gas fueled vehicle , comprising:a natural gas fueled Internal Combustion Engine (ICE) to provide motive power to the vehicle;a pressurizable tank disposed on the vehicle to contain a natural gas;a natural gas adsorbent disposed in the tank;a fuel supply tube to convey the natural gas to the ICE;a scroll compressor on the vehicle to receive the natural gas from the tank and to deliver a first mixture of a compressed natural gas and an oil to a gas and oil separator; andthe gas and oil separator to receive the first mixture of the compressed natural gas and the oil from the scroll compressor and to separate the oil from the compressed natural gas and to deliver the compressed natural gas to the fuel supply tube substantially free from the oil.2. The natural gas fueled vehicle as defined in wherein the gas and oil separator is a two-stage gas and oil separator having a first stage gas and oil separator in fluid communication with an output of the scroll compressor to separate a first portion of the oil from the first mixture of the compressed natural gas and the oil and discharge a second mixture of the compressed natural gas and the oil to be received by a second stage gas and oil separator to ...

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Номер записи: 35

25-01-2018 дата публикации

OIL-FLOODED SCREW COMPRESSOR SYSTEM AND METHOD FOR MODIFYING THE SAME

Номер: US20180023571A1

Автор: ENDO Yasuaki

Принадлежит: MAYEKAWA MFG. CO., LTD.

An oil-flooded screw compressor system includes: a first lubricating oil supply system for supplying lubricating oil to screw parts; and a second lubricating oil supply system for supplying the lubricating oil to a bearing. The first lubricating oil supply system includes: a gas-liquid separator; a first supply flow passage; and a first supply path. The second lubricating oil supply system includes: a lubricating oil reservoir; a second supply flow passage; a second supply path; a first discharge flow passage; and a discharge path. It is possible to suppress dissolution of a gas to be compressed in lubricating oil and to suppress damage to a bearing due to deterioration of the performance of the lubricating oil, even in a case where the gas to be compressed is compatible with the lubricating oil. 1. An oil-flooded screw compressor system for compressing a gas to be compressed which is a compatible gas with lubricating oil , comprising: a male screw rotor and a female screw rotor each having a screw part and shaft portions formed on both ends of the screw part;', 'a housing having a screw chamber accommodating the screw parts inside and a bearing chamber accommodating the shaft portions inside; and', 'a bearing disposed in the bearing chamber, for rotatably supporting the shaft portions;, 'a screw compressor which includesa first lubricating oil supply system for supplying lubricating oil to the screw parts; anda second lubricating oil supply system for supplying the lubricating oil to the bearing, a gas-liquid separator configured to introduce discharge gas of the screw compressor therein and to separate the lubricating oil from the discharge gas;', 'a first supply flow passage formed through a housing wall which constitutes the housing, the first supply flow passage having an opening on an outer surface of the housing wall and being in communication with the screw chamber; and', 'a first supply path connected to a lubricating-oil storage region of the gas-liquid ...

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Номер записи: 36

28-01-2021 дата публикации

VACUUM PUMP WITH AN OIL MANAGEMENT SYSTEM

Номер: US20210025393A1

Автор: Hong Tinggui

Принадлежит: Fieldpiece Instruments, Inc.

A vacuum pump system includes an air-cooled, O-ring sealed vacuum pump and an oil management system with an LED illuminated clear tank for observation of the oil condition as well as a large oil inlet and outlet for rapid and safe oil changes while the pump is operating. The oil management system is also configured to prevent oil from the sump from being drawn into an evacuated AC/R system when the pump is stopped and the intake ports are not sealed from the high vacuum AC/R system. The oil management system includes a preferential vacuum relief system that allows air instead of the oil from the sump to be drawn back into the evacuated lines. 1. A method of changing the oil in a vacuum pump system comprising the steps of: a vacuum pump with a spring biased oil bottle support platform with a raised and lowered positions and an empty oil bottle having an opening and a removable cap to open and close the opening;', 'an oil management system with an oil reservoir having a cover and a sump with oil, the sump having a drain port with a drain valve, the drain valve having an open and a closed position, the oil management system is optionally enclosed by a closeable oil management door;', 'an oil change reservoir in fluid communication with the oil management system and the vacuum pump, the oil change reservoir sized to contain sufficient oil to support vacuum pump operations while the oil management system is drained and refilled;', 'removing the cap from opening of the empty oil bottle;', 'opening the oil management door;', 'inclining the oil bottle support platform against the bias spring into the lowered position;', 'inserting the empty oil bottle between the support platform and the drain port;', 'raising the oil bottle support platform to the raised position to engage the opening of the empty oil bottle with the drain port;', 'rotating the drain valve to the open position to allow the oil in the sump to drain into the oil bottle;', 'rotating the drain valve into the ...

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Номер записи: 37

02-02-2017 дата публикации

ECCENTRIC MOVABLE VANE PUMP

Номер: US20170030352A1

Автор: Tang Bin

Принадлежит:

An eccentric movable vane pump includes a cylinder body, a first rotor, second rotors, and movable vanes of which the number is greater than or equal to 2. The first rotor is eccentrically disposed with the second rotors. One end of each of the movable vanes is rotatably connected to the first rotor, and the other ends of the movable vanes are rotatably connected to the second rotors. The first rotor is disposed on a main shaft. The cylinder body is provided with a fluid inlet and a fluid outlet respectively corresponding to an expansion area and a compression area of a space between adjacent movable vanes. The pump has a simple structure, high efficiency, low cost, multiple operation conditions, high stability, and a long service life, can operate in a high-speed/ultra-high speed range without being sealed by an elastic device, and has a small radial impact in operation. 112421242124214212142111616221. An eccentric movable vane pump , comprising: a cylinder body () , a first rotor () , second rotors () , and movable vanes () , wherein the first rotor () is eccentrically disposed with the second rotors (); one end of each of the movable vanes () is rotatably connected to the first rotor (); the second rotors () correspond one-to-one to the movable vanes () , and the number of the second rotors () and the number of the movable vanes () are greater than or equal to two; the other ends of the movable vanes () are rotatably connected to the second rotors (); the first rotor () is disposed on a main shaft (); and the cylinder body () is provided with a fluid inlet () and a fluid outlet () respectively corresponding to an expansion area and a compression area of a space between adjacent movable vanes ().242020201. The eccentric movable vane pump according to claim 1 , wherein the second rotors () are respectively provided with fixed vanes () claim 1 , and a volume of a space between adjacent fixed vanes () is periodically compressed and expanded claim 1 , such that the ...

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Номер записи: 38

02-02-2017 дата публикации

Compressor With Thermally-Responsive Modulation System

Номер: US20170030354A1

Автор: Robert C. Stover

Принадлежит: Emerson Climate Technologies Inc

A compressor may include a first scroll, a second scroll and a modulation system. The first scroll may include a first endplate and a first spiral wrap. The second scroll may include a second endplate and a second spiral wrap interleaved with the first spiral wrap and cooperating to form a plurality of working fluid pockets therebetween. The modulation system may include a temperature-responsive displacement member that actuates in response to a temperature within a space rising above a predetermined threshold. Actuation of the displacement member may be controlled to control a capacity of the compressor.

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Номер записи: 39

02-02-2017 дата публикации

SCREW COMPRESSOR

Номер: US20170030356A1

Автор: CHIBA Kotaro, IIZUKA Yasuaki, KATO Eisuke, Tsuchiya Takeshi, YONEMOTO Ryuichiro

Принадлежит:

A slide valve forming a part of a bore and movable in an axial direction of the rotors, foot sections on a discharge side end face of the slide valve, and discharge ports and on a discharge chamber side of the slide valve in order to discharge compressed gas taken into a compression operation chamber from the suction chamber and compressed. At a discharge side end portion of the slide valve, first discharge channels and lead the compressed gas discharged from the discharge port and lead the compressed gas to the discharge chamber and second discharge channels are provided on a radial direction outer side of the first discharge channel and opened to the first discharge channels and the discharge chamber to lead a part of the compressed gas flowing in the first discharge channels and feed the part of the compressed gas to the discharge chamber. 1. A screw compressor comprising:a male rotor;a female rotor that meshes with the male rotor;a casing that includes a bore for housing the male rotor and the female rotor and in which a suction chamber is formed on a suction side and a discharge chamber is formed on a discharge side;a slide valve forming a part of the bore and provided to be movable in an axial direction of the male rotor and the female rotor;foot sections provided on a discharge side end face of the slide valve and for supporting the slide valve in the casing; anda discharge port provided on a discharge side of the slide valve in order to discharge, to the discharge chamber, compressed gas taken into a compression operation chamber formed by the male rotor, the female rotor, and the casing from the suction chamber and compressed, whereinat a discharge side end portion of the slide valve, a first discharge channel for leading the compressed gas discharged from the discharge port and leading the compressed gas to the discharge chamber and a second discharge channel provided on a radial direction outer side of the first discharge channel and opened to the first ...

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Номер записи: 40

01-02-2018 дата публикации

Systems and methods for assessing the health of a first apparatus by monitoring a dependent second apparatus

Номер: US20180030851A1

Автор: Floyd R. Emmons

Принадлежит: United Technologies Corp

Systems and methods for assessing the health of a first apparatus by monitoring a second apparatus are described herein. A method for monitoring a health of a first apparatus may comprise receiving a performance parameter from a second apparatus, wherein performance of the second apparatus is dependent upon the health of the first apparatus, assessing the performance parameter, and determining the health of the first apparatus. In various embodiments, the performance parameter may comprise at least one of a speed value of the second apparatus, a position value of the second apparatus, a temperature value of the second apparatus, or a time value of the second apparatus.

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Номер записи: 41

01-02-2018 дата публикации

VACUUM PUMP WITH COOLING APPARATUS

Номер: US20180030983A1

Автор: Lee In Cheol

Принадлежит:

The present invention relates to a technology of efficiently cooling a vacuum pump that produces a vacuum in a process chamber of a semiconductor manufacturing facility. The present invention provides a new type of vaccum pump cooling method that keeps the internal temperature of a vacuum pump at a predetermined level by circulating oil through rotors of the vacuum pump, such that it is possible to prevent a rapid increase in the temperature of the vacuum pump and smoothly lubricate bearings at the early stage of operation, whereby it is possible to ensure stability when performing processes and operating the pump and economically maintain the facility. 1. A vacuum pump with a cooling apparatus , comprising:{'b': 12', '10', '11, 'a pump housing () having an inlet () for receiving gas and an outlet () for discharging gas;'}{'b': 13', '13', '12, 'i': a', 'b, 'a pair of rotors (, ) supported at both ends in the pump housing () and generating vacuum pressure by rotating in mesh with each other;'}{'b': 14', '13', '13', '13, 'i': a', 'a', 'b, 'a motor () connected to a shaft of the rotor () to drive the rotors (, ); and'}{'b': 15', '13', '13, 'i': a', 'b, 'gears () for cooperation between the rotors (, );'}{'b': 31', '12, 'a first temperature sensor () disposed at a gas inlet side of the pump housing () to detect temperature of gas;'}{'b': 32', '18, 'a second temperature sensor () disposed in a main oil line of the oil supply unit () to detect temperature of oil; and'}{'b': 33', '31', '32, 'a micro processor () variably controlling temperature of oil on the basis of temperature values input from the first temperature sensor () and the second temperature sensor (),'}{'b': 16', '13', '13', '17', '16', '17', '18', '13', '13', '16, 'i': a', 'b', 'a', 'b, 'wherein holes () are formed in parallel along axial lines of the rotors (, ), oil supply pipes () are disposed in the holes (), oil is supplied into the oil supply pipes () from an oil supply unit (), and the oil cools the ...

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Номер записи: 42

17-02-2022 дата публикации

Method for Controlling a Compressor Installation

Номер: US20220049693A1

Автор: Oppel Thomas

Принадлежит: Kaeser Kompressoren SE

A method for controlling a compressor system comprising a plurality of compressors, wherein the compressor system is intended to maintain a predefined excess pressure in a pressurized fluid system, wherein decisions are met at fixed or variable intervals as to switching operations for adapting the system to current conditions, wherein —in a pre-selecting step, switching alternatives are excluded from the plurality of combinatorially available switching alternatives, —in a main selecting step, remaining switching alternatives are weighed against one another while referring to one or more optimization criterion (criteria) and optimum switching alternatives are selected from among the given criteria, and —in a control step, the selected switching alternative is output for implementation in the compressor system. 1. A method for controlling a compressor system including a plurality of compressors , each compressor optionally having a different design or performance , the compressor system maintaining a predefined excess pressure in a pressurized fluid system despite a withdrawal of pressurized fluid from the pressurized fluid system , the method comprising the steps of:excluding one or more switching alternatives from a plurality of available switching alternatives based on current conditions of the pressurized fluid system,evaluating the plurality of switching alternatives other than the excluded switching alternatives based on an optimization criterion,selecting a switching alternative from the plurality of switching alternatives based on the evaluation, andoutputting the selected switching alternative to the compressor system,wherein selecting the switching alternative occurs at fixed or variable intervals.2. The method according to claim 1 , further comprising:increasing generation of the pressurized fluid upon reaching a switch-on pressure and reducing generation of compressed pressurized fluid upon reaching a switch-off pressure.3. A method for controlling a ...

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Номер записи: 43

31-01-2019 дата публикации

Compressor Unit and Method for Operating a Compressor Unit

Номер: US20190032655A1

Автор: Feller Klaus, Loerch Roni, Mikulic Tihomir

Принадлежит:

A compressor unit including a screw compressor having a compressor housing that has a screw rotor chamber arranged in the compressor housing, two screw rotors that are arranged in the screw rotor chamber and are mounted on the compressor housing to be rotatable about a respective screw rotor axis, and at least one control slider, which is arranged in a slider channel of the compressor housing, is adjacent to both screw rotors and is movable in a direction of displacement parallel to the screw rotor axes and takes a form such that it affects the final volume and/or the initial volume, wherein there is provided on the screw compressor a compressor operational control unit that takes a form such that it performs a compressor operating function that assists at least one operation of the compressor unit. 1. A compressor unit , including a screw compressor having a compressor housing that has a screw rotor chamber arranged in the compressor housing , at least one screw rotor that is arranged in the screw rotor chamber , is mounted on the compressor housing to be rotatable about a screw rotor axis and receives gaseous medium having an initial volume that is supplied by way of a low-pressure chamber arranged in the compressor housing and discharges it , compressed to a final volume , in the region of a high-pressure chamber arranged in the compressor housing , and at least one control slider , which is arranged in a slider channel of the compressor housing , is adjacent to the screw rotor and is movable in a direction of displacement parallel to the screw rotor axis and takes a form such that it affects the final volume and/or the initial volume ,there is provided on the screw compressor a compressor operational control unit that takes a form such that it performs a compressor operating function that assists at least one operation of the compressor unit.2. A compressor unit according to claim 1 , wherein the at least one compressor operating function is a parameter ...

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Номер записи: 44

31-01-2019 дата публикации

VACUUM PUMP WITH AN OIL MANAGEMENT SYSTEM

Номер: US20190032662A1

Автор: Hong Tinggui

Принадлежит: Fieldpiece Instruments, Inc.

A vacuum pump system includes an air-cooled, O-ring sealed vacuum pump and an oil management system with an LED illuminated clear tank for observation of the oil condition as well as a large oil inlet and outlet for rapid and safe oil changes while the pump is operating. The oil management system is also configured to prevent oil from the sump from being drawn into an evacuated AC/R system when the pump is stopped and the intake ports are not sealed from the high vacuum AC/R system. The oil management system includes a preferential vacuum relief system that allows air instead of the oil from the sump to be drawn back into the evacuated lines. 1. A vacuum pump system comprising:a vacuum pump having a volute and at least one bearing wherein the gas input to the vacuum pump is configured to be above the drive shaft when the vacuum pump system is configured to operate;an oil management system in fluid communication with the vacuum pump, the oil management system having a primary oil reservoir with a first volume and an oil change reservoir with a second volume, wherein the primary oil reservoir and the oil change reservoir are in fluid communication with an oil pump, and wherein the first volume is larger than the second volume; andwherein the second volume is smaller than the vacuum pump volute.2. The vacuum pump system of where the oil management system further comprises:an oil pump discharge port in the oil change reservoir operably connected to the oil pump; andwherein the oil change reservoir is configured to allow oil in the oil change reservoir to overflow the volume of the oil change reservoir and flow into the primary oil reservoir and the oil pump is adapted to circulate oil from the primary oil reservoir to the oil change reservoir.3. The vacuum pump system of where the oil management system further comprises:an oil flow path from the oil change reservoir to the at least one bearing in the vacuum pump.4. The vacuum pump system of wherein the oil change ...

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Номер записи: 45

31-01-2019 дата публикации

Refrigerant Compressor Unit

Номер: US20190032666A1

Автор: Feller Klaus, Mikulic Tihomir

Принадлежит:

A refrigerant compressor unit, including a compressor housing and at least one compressor element that is arranged in the compressor housing, is movable by bearing and drive parts, and operates in at least one compressor chamber, at least one lubricant supply point arranged in the compressor housing for at least one of the bearing and drive parts and/or compressor element, and a lubricant supply line to the at least one lubricant supply point, wherein the lubricant supply line has a lubricant storage chamber through which lubricant flows and in which a lubricant presence sensor is arranged for detecting the presence of lubricant in the lubricant storage chamber. 1. A refrigerant compressor unit , including a compressor housing and at least one compressor element that is arranged in the compressor housing , is movable by bearing and drive parts , and operates in at least one compressor chamber , at least one lubricant supply point arranged in the compressor housing for at least one of the bearing and drive parts and/or compressor element , and a lubricant supply line to the at least one lubricant supply point ,the lubricant supply line has a lubricant storage chamber through which lubricant flows and in which a lubricant presence sensor is arranged for detecting lubricant in the lubricant storage chamber.2. A refrigerant compressor unit according to claim 1 , wherein the lubricant presence sensor is an optical sensor.3. A refrigerant compressor unit according to claim 1 , wherein the optical lubricant presence sensor is arranged with a sensor surface that detects the presence of lubricant adjacent to the lubricant storage chamber.4. A refrigerant compressor unit according to claim 2 , wherein the lubricant storage chamber forms claim 2 , in relation to the rest of the flow sections of the lubricant supply line claim 2 , an unthrottled section claim 2 , and for example takes a form having a widened cross section by comparison with the rest of the flow sections of the ...

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Номер записи: 46

30-01-2020 дата публикации

METHOD FOR OPERATION CONTROL OF COMPRESSOR AND THE COMPRESSOR

Номер: US20200032801A1

Автор: OGUMA Takahiro, OTA Hiroyuki

Принадлежит:

In a method for operation control of a compressor, full-load running in which a gas intake control valve is fully open and a target rotation speed of a drive source is set to a full-load rotation speed that is a maximum rotation speed in a speed control band when pressure of compressed gas supplied to the consumption side is a datum pressure or less is carried out; then no-load running in which the valve is fully closed and a no-load rotation speed is set as the target rotation speed of the drive source when the supply pressure is a no-load running pressure or less that is a pressure higher than the datum pressure is carried out. The no-load running is started from the standard no-load rotation speed, however, after a transition time, the target rotation speed is reduced to a low speed no-load rotation speed. 1. A method for operation control of a compressor to perform capacity control configured by control of a gas intake rate using a gas intake control valve provided in a gas intake port of a compressor body and by control of a rotation speed of a drive source driving the compressor body so that a pressure of compressed gas supplied to a consumption side lies within a predetermined range , the capacity control comprising:full-load running in which the gas intake control valve is fully open and a target rotation speed of the drive source is set to a full-load rotation speed that is a maximum rotation speed in a speed control band when a supply pressure that is a pressure of compressed gas supplied to the consumption side is equal to or less than a predetermined datum pressure; andno-load running in which the gas intake control valve is fully closed and a predetermined no-load rotation speed is set as the target rotation speed of the drive source, when the supply pressure is equal to or greater than a no-load running pressure that is a predetermined pressure higher than the datum pressure;starting the no-load running with a predetermined standard no-load rotation ...

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Номер записи: 47

01-05-2014 дата публикации

METHOD FOR ROTARY POSITIVE DISPLACEMENT PUMP PROTECTION

Номер: US20140119966A1

Автор: SEMIDEY Robert, STAVALE Anthony E.

Принадлежит: ITT Manufacturing Enterprises LLC

Techniques are provided for protecting a rotary positive displacement pump. The techniques include apparatus featuring a signal processor configured to receive signaling containing information about power, torque, speed, viscosity and specific gravity related to the operation of a pump; and determine whether to enter an enhanced pump protection mode for the rotary positive displacement pump based at least partly on a relationship between an actual corrected tune ratio and a tuned ratio set point (Tune Ratio SP). The signal processor may determine if the actual corrected tune ratio is less than or equal to the actual corrected tune ratio set point (Tune Ratio SP), and if so, then to enter the enhanced pump protection mode, else to continue to use a basic pump protection mode, and may also determine the actual corrected tune ratio based at least partly on a ratio of an actual corrected power (PAcorr) divided by a tuned corrected power (PTcorr) at a specific operating speed 1. Apparatus comprising:a signal processor configured toreceive signaling containing information about power, torque and speed related to the operation of a rotary positive displacement pump; anddetermine whether to enter an enhanced pump protection mode for the rotary positive displacement pump based at least partly on a relationship between an actual corrected tune ratio and a tuned ratio set point (Tune Ratio SP).2. Apparatus according to claim 1 , wherein the signal processor is configured to determine if the actual corrected tune ratio is less than or equal to the actual corrected tune ratio set point (Tune Ratio SP) claim 1 , and if so claim 1 , then to enter the enhanced pump protection mode claim 1 , else to continue to use a basic pump protection mode.3. Apparatus according to claim 1 , wherein the signal processor is configured to determine the actual corrected tune ratio based at least partly on a ratio of an actual corrected power (PAcorr) divided by a tuned corrected power (PTcorr) at a ...

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Номер записи: 48

04-02-2021 дата публикации

COMPRESSOR AND REFRIGERATION CYCLE APPARATUS

Номер: US20210033311A1

Автор: KOUNO Yasuhiro, Okamoto Masakazu

Принадлежит:

A compressor includes a casing, compression mechanism disposed inside the casing, a discharge tube, a first temperature sensor, and a second temperature sensor. The compression mechanism compresses a sucked refrigerant, and discharges the compressed refrigerant to a refrigerant channel formed in an inner space of the casing. The compressed refrigerant flows from the inner space of the casing to an outside through the discharge tube. The first temperature sensor includes a temperature sensing portion disposed in the refrigerant channel, and directly measuring a temperature of the refrigerant. The second temperature sensor is disposed at a different position from the first temperature sensor. The second temperature sensor measures a temperature of one of a surface of the discharge tube, an inner space of the discharge tube, and a surface of the casing. 1. A compressor comprising:a casing; compressing a sucked refrigerant, and', 'discharging the compressed refrigerant to a refrigerant channel formed in an inner space of the casing;, 'a compression mechanism disposed inside the casing, the compression mechanism'}a discharge tube through which the compressed refrigerant flows from the inner space of the casing to an outside;a first temperature sensor including a temperature sensing portion disposed in the refrigerant channel, the temperature sensing portion directly measuring a temperature of the refrigerant; and a surface of the discharge tube,', 'an inner space of the discharge tube, and', 'a surface of the casing., 'a second temperature sensor disposed at a different position from the first temperature sensor, the second temperature sensor measuring a temperature of one of'}2. The compressor according to claim 1 , whereinthe second temperature sensor measures the temperature of the surface of the discharge tube.3. The compressor according to claim 1 , whereinthe first temperature sensor is disposed to penetrate the casing, and the first temperature sensor is ...

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Номер записи: 49

11-02-2016 дата публикации

TWO-SHAFT ROTARY PUMP

Номер: US20160040669A1

Автор: HARAYAMA Shingo, MIYAZAWA Shun, YAMADA Humihiko, YOSHIDA Yosuke

Принадлежит:

Provided is a two-shaft rotary pump which is capable of improving reliability and operation efficiency by preventing an exhaust gas from flowing backward into a pump as much as possible, preventing the interior of the pump form being excessively compressed as much as possible, and suppressing temperature rise in the pump. A two-shaft rotary pump in which two rotating shafts () provided with rotors () are supported by bearings, such that the two rotors () are rotated in a noncontact manner with a small clearance kept therebetween and the two rotors () are rotated in a noncontact manner with a small clearance between an inner surface of a cylinder () and the two rotors, and a gas sucked into the cylinder () and compressed is discharged from the cylinder (), wherein an escape hole capable of letting a part of the compressed gas escape is provided in at least one of end wall portions () constituting both ends of the cylinder () and opened in the axial direction of the rotating shafts (). 115-. (canceled)16. A two-shaft rotary pump , in which two rotating shafts provided with rotors are supported by bearings , such that the two rotors are rotated in a noncontact manner with a small clearance kept therebetween and the two rotors are rotated in a noncontact manner with a small clearance between an inner surface of a cylinder and the two rotors , and a gas sucked into the cylinder and compressed is discharged from the cylinder ,wherein at least one escape hole capable of letting a part of the compressed gas escape is provided in at least one of end wall portions constituting both ends of the cylinder and opened in the axial direction of the rotating shafts, anda check valve, which opens when an inner pressure of the cylinder is higher than a prescribed pressure and closes when the inner pressure of the cylinder is lower than the prescribed pressure, is provided to the escape hole.17. The two-shaft rotary pump according to claim 16 , wherein the check valve is a reed valve. ...

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Номер записи: 50

11-02-2016 дата публикации

Method of determining pump flow in twin screw positive displacement pumps

Номер: US20160041026A1

Автор: STAVALE Anthony E.

Принадлежит:

Techniques are provided for tuning a twin screw positive displacement pump having a signal processor with a signal processor to receive signaling containing information about actual pump performance data for actual rated conditions captured during a tuning function related to the operation of a twin screw positive displacement pump; and determine corrected pump performance data to operate the rotary positive displacement pump by compensating pump performance data being used for operating the twin screw positive displacement pump based at least partly on the actual pump performance data for the actual rated conditions captured during the tuning function. The corrected pump performance data includes corrected published pump performance data having a corrected published rated power and slip factor, and the actual pump performance data contains information about actual power, specific gravity and viscosity related to the operation of the twin screw positive displacement pump and received from a pump controller or controlling device, including a variable frequency drive. 1. Apparatus comprising:a signal processor configured toreceive signaling containing information about actual pump performance data for actual rated conditions captured during a tuning function related to the operation of a twin screw positive displacement pump; anddetermine corrected pump performance data to operate the twin screw positive displacement pump by compensating pump performance data being used for operating the twin screw positive displacement pump based at least partly on the actual pump performance data for the actual rated conditions captured during the tuning function.2. Apparatus according to claim 1 , wherein the corrected pump performance data include corrected published pump performance data having a corrected published rated power a rated slip factor compensated for the actual rated conditions.3. Apparatus according to claim 1 , wherein the actual pump performance data includes ...

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Номер записи: 51

08-02-2018 дата публикации

Variable Volume Ratio Compressor

Номер: US20180038369A1

Автор: DOEPKER Roy J., PEREVOZCHIKOV Michael M.

Принадлежит: EMERSON CLIMATE TECHNOLOGIES, INC.

A compressor may include a shell, first and second scroll members, a partition plate and a bypass valve member. The shell defines a discharge-pressure region and a suction-pressure region. The first scroll member is disposed within the shell and may include a first end plate having a discharge passage, and first and second bypass passages extending through the first end plate. The partition plate is disposed within the shell and separates the discharge-pressure region from the suction-pressure region and includes an opening in communication with the discharge-pressure region. The bypass valve member is movable between a first position restricting fluid flow through at least one of the first and second bypass passages and the opening and a second position in allowing fluid flow through the at least one of the first and second bypass passages and the opening. 1. A compressor comprising:a shell defining a discharge-pressure region and a suction-pressure region;a first scroll member disposed within the shell and including a first end plate and a first spiral wrap extending from a first side of the first end plate, the first end plate including a discharge passage, a first bypass passage and a second bypass passage extending through the first side and a second side of the first end plate;a second scroll member including a second spiral wrap cooperating with the first spiral wrap to define first and second fluid pockets therebetween, the first and second fluid pockets in communication with the first and second bypass passages, respectively;a partition plate disposed within the shell and separating the discharge-pressure region from the suction-pressure region, the partition plate including an opening in communication with the discharge-pressure region, the first scroll member including a hub through which the discharge passage extends;a bypass valve member disposed around the hub and movable between a first position in which the bypass valve member restricts fluid flow ...

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Номер записи: 52

08-02-2018 дата публикации

Variable Volume Ratio Compressor

Номер: US20180038370A1

Автор: Michael M. Perevozchikov, Roy J. Doepker

Принадлежит: Emerson Climate Technologies Inc

A compressor may include a shell, first and second scroll members, a partition plate and a bypass valve member. The shell defines a discharge-pressure region and a suction-pressure region. The first scroll member is disposed within the shell and may include a first end plate having a discharge passage, and first and second bypass passages extending through the first end plate. The partition plate is disposed within the shell and separates the discharge-pressure region from the suction-pressure region and includes an opening in communication with the discharge-pressure region. The bypass valve member is movable between a first position restricting fluid flow through at least one of the first and second bypass passages and the opening and a second position in allowing fluid flow through the at least one of the first and second bypass passages and the opening.

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Номер записи: 53

08-02-2018 дата публикации

Rotating cylinder type compressor

Номер: US20180038372A1

Автор: Hiroshi Ogawa, Kazuhide Uchida, Yoshinori Murase, Yuichi Ohno

Принадлежит: Denso Corp, Soken Inc

A rotating cylinder type compressor includes: a cylinder having a cylindrical shape and rotating about a central axis; a first rotor and a second rotor each having a cylindrical shape and rotating about an eccentric axis eccentric to the central axis of the cylinder; a shaft; a first vane; and a second vane. The first vane is slidably fitted to a first groove portion defined in the first rotor to define a first compression chamber. The second vane is slidably fitted to a second groove portion defined in the second rotor to define a second compression chamber. The first rotor and the second rotor are arranged in an extending direction of the central axis of the cylinder.

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Номер записи: 54

12-02-2015 дата публикации

VARIABLE CAPACITY TYPE VANE PUMP

Номер: US20150044083A1

Автор: AKATSUKA Koichiro, Fujita Tomoyuki, KATO Fumiyasu, SUGIHARA Masamichi

Принадлежит: KAYABA INDUSTRY CO., LTD.

A variable capacity type vane pump with a first fluid pressure chamber and a second fluid pressure chamber provided at opposite sides of a pivot point of a cam ring includes a control valve for controlling a drive pressure of working fluid introduced from a pump chamber to the second fluid pressure chamber, a suction pressure of the working fluid sucked into the pump chamber is constantly introduced to the first fluid pressure chamber, and the cam ring pivots in a direction to decrease a discharge capacity due to a pressure in the pump chamber acting on an inner peripheral cam surface during an operation to reduce the drive pressure, whereas the cam ring pivots in a direction to increase the discharge capacity during an operation to increase the drive pressure.

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Номер записи: 55

06-02-2020 дата публикации

COMPRESSOR UNIT FOR REFRIGERATING MACHINE FOR DOMESTIC OR COMMERCIAL USE AND REFRIGERATING MACHINE FOR DOMESTIC OR COMMERCIAL USE WHICH COMPRISES IT

Номер: US20200040891A1

Автор: NALINI Luigi

Принадлежит:

A compressor unit () of a refrigerating machine () for domestic or commercial use has a rotary compressor () which has a BLDC or BLAC motor (), connected to a compression element () for actuating it, and a control device () connected to the motor (), for driving it at a variable speed. The compressor () further has a a housing () which encloses the motor () and the compression element () and which has a side wall () inside of which the stator () of the motor () is fixed. The compressor unit () also comprises an operating shell () covering the housing () and in thermal communication with the side wall (). The operating shell () dissipates heat transmitted to it by the housing () and contrasts or absorbs or dissipate sound waves having a frequency of between 4 kHz and 16 kHz. 2102222191721181720. The compressor unit () according to claim 1 , which comprises a base () claim 1 , for resting on a supporting surface claim 1 , said base () being fixed to a lower wall () of said housing (); said operating shell () being configured in such a way as to cover an upper wall () of said housing () and said side wall ().310211817. The compressor unit () according to claim 2 , wherein said operating shell () is in thermal contact with the upper wall () of said housing ().4102324201817. The compressor unit () according to claim 2 , comprising an operating layer () made of sound absorbent foam-type material having a first face () in thermal contact with said side wall () and/or with said upper wall () of said housing ().5102324201817. The compressor unit () according to claim 3 , comprising an operating layer () made of sound absorbent foam-type material having a first face () in thermal contact with said side wall () and/or with said upper wall () of said housing ().610. The compressor unit () according to claim 4 , wherein said sound absorbent foam-type material comprises a melamine resin foam.710. The compressor unit () according to claim 5 , wherein said sound absorbent foam-type ...

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Номер записи: 56

06-02-2020 дата публикации

MULTISTAGE POWER SAVING VACUUM DEVICE WITH ROOT VACUUM PUMP IN FIRST STAGE

Номер: US20200040895A1

Автор: Shaw Raymond Zhou

Принадлежит:

A multistage power saving vacuum device with a root vacuum pump in a first stage is used in condenser vacuuming of a fired power plant. A root vacuum pump is used in a first stage and then at least one second stage vacuum pump is used to further process the pumping gas so that the gas vented outside is compressed through multiple stages and thus volume of the gas to be vented out has reduced greatly so as to reduce power consumption. The multistage power saving vacuum device comprises a vacuum inlet gas-driving shut-off valve; a first root vacuum pump; at least one second vacuum pump serially connected to the first root vacuum pump; when there are more than one the second vacuum pumps, all the second vacuum pumps are serially connected. The multistage power saving vacuum device further comprises a last stage vacuum pump and a vapor separator. 1. A multistage power saving vacuum device with a root vacuum pump in a first stage , comprising:{'b': '13', 'a vacuum inlet gas-driving shut-off valve () for receiving non-condensing gas pumping from a power plant condenser;'}{'b': '1', 'a first root vacuum pump () connected to the vacuum inlet gas-driving shut-off valve for receiving and compressing the gas outputted from the vacuum inlet gas-driving shut-off valve;'}{'b': 50', '1', '50, 'at least one second vacuum pump () serially connected to the first root vacuum pump for further compressing the gas from the first root vacuum pump (); and when there are more than one second vacuum pumps (), all the second vacuum pumps being serially connected.'}2. The multistage power saving vacuum device with a root vacuum pump in a first stage as claimed in claim 1 , further comprising:{'b': 60', '50', '50, 'a last stage vacuum pump () connected to the at least one second vacuum pump () for further compressing the gas outputted from the at least one second vacuum pump (); and'}{'b': 10', '60', '60, 'a vapor separator () connected to the last stage vacuum pump () for separating vapor and ...

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Номер записи: 57

06-02-2020 дата публикации

Screw Compressor for a Utility Vehicle

Номер: US20200040897A1

Автор: HEBRARD Gilles, KOECK Engelbert, MARESCOT Jean-Baptiste, MELLAR Joerg, WEINHOLD Thomas

Принадлежит:

A screw compressor system for a utility vehicle includes at least one screw compressor and at least one control and/or regulation unit for controlling and regulating the screw compressor. The control and/or regulation unit is designed such that the screw compressor is prevented, for a determined period of time, from re-starting after being stopped. 18-. (canceled)9. A screw compressor system for a utility vehicle , comprising:at least one screw compressor; andan open-loop and/or closed-loop control unit for open-loop and/or closed-loop drive control of the screw compressor, whereinthe open-loop and/or closed-loop control unit is configured such that the screw compressor is, after a stoppage, prevented from restarting for a predetermined time period.10. The screw compressor system as claimed in claim 9 , whereinthe open-loop and/or closed-loop control unit is a constituent part of the screw compressor.11. The screw compressor system as claimed in claim 9 , whereinthe open-loop and/or closed-loop control unit is a constituent part of a drive of an air treatment system of the utility vehicle.12. The screw compressor system as claimed in claim 9 , whereinthe open-loop and/or closed-loop control unit is a constituent part of an engine or vehicle controller of the utility vehicle.13. The screw compressor system as claimed in claim 9 , whereinthe open-loop and/or closed-loop control unit is in a form of a separate open-loop and/or closed-loop control unit.14. The screw compressor system as claimed in claim 9 , whereinthe time period amounts to at least approximately 10 seconds.15. The screw compressor system as claimed in claim 9 , whereinthe time period amounts to at least approximately 15 seconds.16. The screw compressor system as claimed in claim 9 , whereinthe screw compressor has at least one relief valve.17. The screw compressor system as claimed in claim 16 , whereinthe relief valve is dimensioned such that an interior of the screw compressor can, within the time ...

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Номер записи: 58

16-02-2017 дата публикации

MULTI-STAGE PUMP ASSEMBLY HAVING A PRESSURE CONTROLLED VALVE FOR CONTROLLING RECIRCULATION OF FLUID FROM THE PUMP STAGE OUTLET TO THE PUMP STAGE INLET

Номер: US20170045048A1

Автор: Denny Mark Joseph

Принадлежит: BP Exploration Operating Company Limited

The invention provides a pump comprising a pump inlet, a pump outlet, at least two threaded rotors and a pressure controlled valve, the pressure controlled valve being capable of controlling re-circulation of fluid from the pump outlet to the pump inlet. The pressure controlled valve can be a control valve. The invention also provides a multiple stage pump assembly comprising at least two pumps arranged in series, wherein at least one of the pumps is the aforementioned pump. 137.-. (canceled)38. A multiple stage pump assembly comprising at least two pumps arranged in series , wherein at least the second and each subsequent pump comprises a pump inlet , a pump outlet , at least two threaded rotors and a pressure controlled valve , the pressure controlled valve configured to control re-circulation of fluid from the pump outlet to the pump inlet.39. The assembly of claim 38 , wherein the pressure controlled valve is configured to control the rate of fluid flow there-through in proportion to the gas to liquid ratio of a fluid being pumped by the pump in use.40. The assembly of claim 38 , wherein the pressure controlled valve is a control valve.41. The assembly of claim 38 , further comprising a conduit connecting the pump outlet to the pump inlet claim 38 , wherein the conduit is configured to flowre-circulated fluid from the pump outlet to the pump inlet.42. The assembly of claim 41 , wherein the pressure controlled valve is located wholly or partly within the conduit or adjacent one or other end of the conduit.43. The assembly of claim 41 , further comprising a recess in the pump outlet configured to selectively flow liquid rather than gas from an enclosure in which the threaded rotors are located to the conduit.44. The assembly of claim 38 , wherein the pressure controlled valve is configured to respond to an absolute pressure difference between the pump outlet and the pump inlet such that the valve permits fluid to flow there-through when the absolute pressure ...

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Номер записи: 59

15-02-2018 дата публикации

SCREW COMPRESSOR

Номер: US20180045200A1

Автор: Iwai Satoshi, KATO Eisuke, YONEMOTO Ryuichiro

Принадлежит:

A screw compressor includes a screw rotor, an electric motor for driving the screw rotor, bearings supporting the screw rotor and casings housing these members. The screw compressor also includes an oil feeding passage formed in the casing for feeding oil on a high pressure side to the bearings by a differential pressure between the high pressure side and a low pressure side and an oil feeding amount adjusting unit placed in a middle of the oil feeding passage, the oil feeding amount adjusting unit includes a cylinder, a valve element provided to reciprocate inside the cylinder, and plural flow paths provided in the valve element having different flow path areas, the plural flow paths are switched to adjust an oil feeding amount to be fed to the bearings by moving the valve element in accordance with the differential pressure between the high pressure side and the low pressure side. 1. A screw compressor having a screw rotor , an electric motor for driving the screw rotor , bearings supporting the screw rotor and casings housing these members , comprising:an oil feeding passage formed in the casing for feeding oil on a high pressure side to the bearings by a differential pressure between the high pressure side and a low pressure side; andan oil feeding amount adjusting unit provided in a middle of the oil feeding passage,wherein the oil feeding amount adjusting unit includes a cylinder, a valve element provided so as to reciprocate freely inside the cylinder, and plural flow paths provided in the valve element having different flow path areas, andthe plural flow paths are switched to adjust an oil feeding amount to be fed to the bearings by moving the valve element in accordance with the differential pressure between the high pressure side and the low pressure side.2. The screw compressor according to claim 1 , further comprising:a suction pressure measuring device detecting a suction pressure in the screw compressor; anda discharge pressure measuring device ...

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Номер записи: 60

03-03-2022 дата публикации

Device

Номер: US20220065253A1

Автор: Shuichi Iguchi

Принадлежит: Seiko Epson Corp

A vacuum pump includes a pump rotor, a housing configured to house the pump rotor, and a monitoring device attached to the housing and configured to detect vibration of the housing. The housing includes first channels for causing a coolant to flow to a portion opposed to the monitoring device.

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Номер записи: 61

14-02-2019 дата публикации

SCROLL COMPRESSOR

Номер: US20190048874A1

Автор: Imai Yusuke, Morimoto Takashi, Sakuda Atsushi, Yamada Sadayuki

Принадлежит:

A scroll compressor according to the present disclosure includes a partition wall that divides a sealed vessel into a high-pressure space and a low-pressure space, a non-orbiting scroll provided in the low-pressure space, an orbiting scroll that forms a compression chamber between the orbiting scroll and the non-orbiting scroll, and a rotational shaft. The scroll compressor further includes a main bearing that supports the orbiting scroll, an elastic body that biases one of the non-orbiting scroll and the orbiting scroll so as to separate the non-orbiting scroll and the orbiting scroll from each other, and a plurality of columnar members that are fixed at one ends of the columnar members and are movable at the other ends of the columnar members, and are disposed in a circumferential direction. The non-orbiting scroll or the orbiting scroll that is biased by the elastic body is movable between the partition wall and the main bearing in an axial direction of the rotational shaft. The elastic body is disposed between the plurality of columnar members in the circumferential direction. 1. A scroll compressor comprising: a partition wall that divides a sealed vessel into a high-pressure space and a low-pressure space;a non-orbiting scroll provided in the low-pressure space, the non-orbiting scroll being disposed adjacent to the partition wall;an orbiting scroll that engages with the non-orbiting scroll with a compression chamber defined between the orbiting scroll and the non-orbiting scroll;a rotational shaft that orbits the orbiting scroll;a main bearing that supports the orbiting scroll;an elastic body that biases one of the non-orbiting scroll and the orbiting scroll so as to separate the non-orbiting scroll from the orbiting scroll; anda plurality of columnar members that are fixed at one ends of the columnar members and are movable at the other ends of the columnar members with respect to the main bearing and the non-orbiting scroll, the columnar members being ...

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Номер записи: 62

25-02-2021 дата публикации

IMPROVED MINIMUM PRESSURE VALVE AND METHOD FOR SERVICING SUCH A VALVE

Номер: US20210054838A1

Автор: DE SCHAMPHELAERE Pieter, MARTENS Kristof Adrien

Принадлежит: ATLAS COPCO AIRPOWER NAAMLOZE VENNOOTSCHAP

The invention relates to a minimum pressure valve () comprising a housing () with the valve inlet () and the valve outlet () connected with each other by means of a chamber and connecting space (), the minimum pressure valve () also comprising a valve body () set up in a chamber () moveably between a closed position in which the valve inlet () is closed and an open position in which the valve inlet () is open, the minimum pressure valve () also comprising components which are provided with a seal and/or sliding parts (), whereby a subassembly () of the minimum pressure valve () can be disassembled and/or assembled through an opening () in the housing (). 121-. (canceled)2210171112222210212011111024263022103117221710ab. A minimum pressure valve () comprising a housing () with a valve inlet () and a valve outlet () connected with each other by means of a chamber and connecting space ( , ) , whereby the minimum pressure valve () also comprises a valve body () that is set up in a chamber () , moveably between , on the one hand , a closed position in which the valve inlet () is closed off and , on the other hand , an open position in which the valve inlet () is open , whereby the minimum pressure valve () also comprises components which are provided with a seal and/or sliding parts ( , , ) , characterised in that a subassembly () of the minimum pressure valve () can be disassembled and/or assembled through an opening () in the housing () , and that the subassembly () has a specific shape so that it can only fit in the housing () of the minimum pressure valve () in one particular way.2310311710. A minimum pressure valve () according to claim 22 , characterised in that the opening () is located in the side wall of the housing () of the minimum pressure valve ().241022242630202136. A minimum pressure valve () according to claim 22 , characterised in that said subassembly () comprises the components which are provided with a seal and/or sliding parts ( claim 22 , claim 22 , ...

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Номер записи: 63

13-02-2020 дата публикации

SCROLL COMPRESSOR

Номер: US20200049146A1

Автор: CHOI Yongkyu, KIM Cheolhwan, Lee Byeongchul, Lee Kangwook

Принадлежит:

A scroll compressor is provided that may include an orbiting scroll having an orbiting wrap, and which performs an orbiting motion; and a fixed scroll having a fixed wrap to form a compression chamber including a suction chamber, an intermediate pressure chamber, and a discharge chamber, by being engaged with the orbiting wrap. In a state in which the orbiting scroll and the fixed scroll are concentric with each other, when a distance between the orbiting wrap and the fixed wrap is defined as an orbiting radius, there exists an offset section having an interval larger than the orbiting radius, between a side surface of the orbiting wrap and a side surface of the fixed wrap which faces the orbiting wrap. With such a configuration, even if the fixed scroll or the orbiting scroll is transformed due to thermal expansion, interference between the fixed wrap and the orbiting wrap at a portion having a large transformation amount may be prevented. This may prevent a frictional loss or abrasion between the fixed wrap and the orbiting wrap. Further, this may restrict or minimize a gap between the fixed wrap and the orbiting wrap at an opposite side to the suction chamber, resulting in enhanced compression efficiency. 1. A compressor , comprising:a casing;a drive motor provided in an inner space of the casing;a rotating shaft coupled to the drive motor to rotate;an orbiting scroll comprising an orbiting plate portion including a shaft coupling portion coupled to the rotating shaft, and an orbiting wrap that extends toward the casing along a circumference of orbiting plate portion in the shaft coupling portion;a fixed scroll comprising a fixed wrap provided in engagement with the orbiting wrap to compress a refrigerant, a fixed plate portion including an inlet receiving the refrigerant and an outlet spaced apart from the inlet toward the shaft coupling portion to discharge the refrigerant; andan offset portion provided in an area of at least one of the fixed wrap or the ...

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Номер записи: 64

26-02-2015 дата публикации

Scroll compressor

Номер: US20150056091A1

Автор: Atsushi Sakuda, Hidenobu Shintaku, Sadayuki Yamada, Takashi Morimoto, Takeshi Ogata, Yusuke Imai

Принадлежит: Panasonic Corp

A diameter of a main bearing member 12 m is defined as Dm, a length thereof is defined as Lm, a diameter of the eccentric bearing member 11 e is defined as De and a length thereof is defined as Le. A ratio (=Lm/Dm) of the length and the diameter of the main bearing member 12 m and a ratio (=Le/De) of the length and the diameter of the eccentric bearing member 11 e are set to Le/De≦Lm/Dm≦1. Therefore, contact at edge portions of both ends of the eccentric bearing member 11 e does not occur, and it is possible to prevent contact at edge portions of both ends of the main bearing member 12 m even if the main shaft 13 m inclines, and to reduce a viscosity loss caused by oil 9 a. Hence, the present invention provides a scroll compressor securing reliability of the bearing members 12 m, 11 e and 16 s and having high efficiency.

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Номер записи: 65

23-02-2017 дата публикации

Variable Speed Compressor Protection System And Method

Номер: US20170051740A1

Автор: PHAM Hung M., SEIBEL Stephen M.

Принадлежит: EMERSON CLIMATE TECHNOLOGIES, INC.

A system and method for a compressor includes a compressor connected to a condenser, a discharge line temperature sensor that outputs a discharge line temperature signal corresponding to a discharge line temperature of refrigerant leaving the compressor, and a control module connected to the discharge line temperature sensor. The control module determines a saturated condenser temperature, calculates a discharge superheat temperature based on the saturated condenser temperature and the discharge line temperature, and monitors a flood back condition of the compressor by comparing the discharge superheat temperature with a predetermined threshold. The control module increases a speed of the compressor when the discharge superheat temperature is less than or equal to the predetermined threshold. 1. A system comprising:a compressor connected to a condenser;a discharge line temperature sensor that outputs a discharge line temperature signal corresponding to a discharge line temperature of refrigerant leaving the compressor;a control module connected to the discharge line temperature sensor, said control module determining a saturated condenser temperature, calculating a discharge superheat temperature based on the saturated condenser temperature and the discharge line temperature, monitoring a flood back condition of the compressor by comparing the discharge superheat temperature with a predetermined threshold, and, when the discharge superheat temperature is less than or equal to the predetermined threshold, increasing a speed of the compressor.2. The system of wherein the predetermined threshold is thirty degrees Fahrenheit.3. The system of wherein the control module increases the speed of the compressor when the discharge superheat temperature is less than or equal to the predetermined threshold.4. The system of wherein the control module decreases an opening of an expansion valve associated with the compressor when the discharge superheat temperature is less than or ...

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Номер записи: 66

15-05-2014 дата публикации

Scroll compressor

Номер: US20140134032A1

Автор: Ken Suitou, Kosaku Tozawa

Принадлежит: Toyota Industries Corp

A scroll compressor includes a rotation shaft, a fixed scroll, a movable scroll, a compression chamber, and a shaft support. A movable member is movable in an axial direction of the rotation shaft toward and away from the movable scroll. A rotation restriction mechanism includes a pin and a hole that is loosely fitted into the hole. An orbital radius switching mechanism moves the movable member in a first direction when a rotation speed of the rotation shaft is increased, which decreases an orbital radius of the pin relative to the hole so that an orbital radius of the movable scroll is decreased, and moves the movable member in a second direction when the rotation speed of the rotation shaft is decreased, which increases the orbital radius of the pin relative to the hole so that the orbital radius of the movable scroll is increased.

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Номер записи: 67

15-05-2014 дата публикации

SCROLL COMPRESSOR

Номер: US20140134033A1

Автор: MURAKAMI Kazuo, SUITOU Ken, TOZAWA Kosaku

Принадлежит: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI

A scroll compressor includes a rotation shaft, a fixed scroll, a movable scroll, a compression chamber, a shaft support, a housing, a movable member arranged in the shaft support, and a rotation restriction mechanism configured to restrict rotation of the movable scroll. The rotation restriction mechanism includes pins, recesses into which the respective pins are loosely fitted, and the movable member. The movable member includes the pins or the recesses. A switching mechanism is configured to switch the movable member between a state in which movement of the movable member in a radial direction of the rotation shaft is restricted and a state in which the restriction is canceled and the movable member can move freely, which changes a movable range of the movable member in the radial direction so that an orbital radius of the movable scroll is changed. 1. A scroll compressor comprising:a rotation shaft;a fixed scroll including a fixed spiral wall;a movable scroll including a movable spiral wall engaged with the fixed spiral wall, wherein the movable scroll orbits when the rotation shaft is rotated;a compression chamber defined between the fixed spiral wall and the movable spiral wall, wherein the compression chamber has a volume that is decreased when the movable scroll orbits, and refrigerant is compressed in the compression chamber when the volume is decreased;a shaft support that supports the rotation shaft, wherein the shaft support and the fixed scroll are arranged at opposite sides of the movable scroll;a housing that accommodates the rotation shaft, the fixed scroll, the movable scroll, and the shaft support;a movable member arranged in the shaft support;a rotation restriction mechanism configured to restrict rotation of the movable scroll, wherein the rotation restriction mechanism includes a plurality of pins, a plurality of recesses into which the respective pins are loosely fitted, and the movable member, and wherein the movable member includes one of the ...

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Номер записи: 68

10-03-2022 дата публикации

A METHOD FOR CONTROLLING A COMPRESSOR TOWARDS AN UNLOADED STATE

Номер: US20220074414A1

Автор: MARTENS Kristof Adrien Laura, PITTOIS Stijn

Принадлежит: Atlas Copco Airpower, Naamloze Vennootschap

A method for controlling a compressor towards an unloaded state, in which the compressor includes a compressor element () with an inlet (), in which in the unloaded state, a residual flow (QD) is suctioned via the inlet () towards and into the compressor element (), and in which for a transition from a loaded state of the compressor to the unloaded state, the inlet () of the compressor element () is partially closed in successive discrete transitional steps. 122. A method for controlling a compressor towards an unloaded state , in which the compressor comprises a compressor element () , the compressor element () being equipped with:{'b': ['5', '6', '7', '6', '5', '2'], '#text': 'an inlet () and a controllable inlet valve () with a valve inlet (), in which the inlet valve () is configured to be able to at least partially close the inlet () of the compressor element (); and'}{'b': ['10', '11', '15'], '#text': 'an outlet () with thereto connected a pressure line () which is connected with a downstream consumer network (),'}{'b': ['19', '11'], '#text': 'in which the compressor further comprises a controllable blow-off valve () that is connected to the pressure line (),'}{'b': ['19', '6'], '#text': 'in which in a loaded state of the compressor, the blow-off valve () is closed and the inlet valve () is entirely open, and'}in which for a transition from the loaded state towards the unloaded state, the method provides for the following steps:{'sub': '15', 'b': '15', '#text': 'determining an operating pressure (p) in the consumer network ();'}{'sub': ['15', '15 max', 'D'], 'b': ['19', '6', '5', '2', '5', '2'], '#text': 'when this operating pressure (p) reaches a set maximum operating pressure (p), the opening of the blow-off valve () and the partial closing by the inlet valve () of the inlet () of the compressor element (), such that after a transition period from the loaded state of the compressor to the unloaded state, in the unloaded state, a residual flow (Q) is ...

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Номер записи: 69

10-03-2022 дата публикации

Magnetic bearing compressor, air conditioner, and protective air gap value setting method

Номер: US20220074638A1

Автор: Bin Yang, Fengshuang Wang

Принадлежит: GD Midea Heating and Ventilating Equipment Co Ltd, Hefei Midea Heating and Ventilating Equipment Co Ltd

Provided are a magnetic bearing compressor, an air conditioner and a protective air gap value setting method. The magnetic bearing compressor includes: a rotor, a magnetic bearing, a sensor, and a control device. The magnetic bearing is sleeved on the rotor; the sensor is arranged on the magnetic bearing and is configured to detect a distance value between the rotor and the sensor on a preset plane; the control device is configured to receive the distance value and determine the minimum distance value and the maximum distance value between the rotor and the magnetic bearing according to the distance value, and obtain an absolute value of a difference of the maximum distance value and the minimum distance value; and the control device obtains a protective air gap value according to the absolute value and a preset protection coefficient when the absolute value is less than or equal to a preset air gap value.

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Номер записи: 70

01-03-2018 дата публикации

HERMETIC VACUUM PUMP ISOLATION VALVE

Номер: US20180058453A1

Автор: Calhoun John, FORNI Ronald J., GALICA George, Lu Vannie

Принадлежит:

A vacuum pump isolation (VPI) valve is interposed between a vacuum pump and a vacuum chamber. During normal operation of the vacuum pump, the VPI valve is open, allowing fluid communication between the vacuum pump and the vacuum chamber. When the vacuum pump becomes non-operational such as by losing power, the VPI valve closes, thereby isolating the vacuum chamber from the vacuum pump. The closing of the VPI valve is driven by the exhaust gas pressure of the vacuum pump. The VPI valve becomes exposed to the exhaust gas pressure by the opening of a pilot valve, which may occur as a result of the vacuum pump ceasing to operate. By this configuration, the VPI valve is hermetic and does not require ambient air for its operation. 1. A vacuum pump isolation (VPI) valve , comprising:a pump inlet housing enclosing an inlet interior;a valve element disposed in the inlet interior, the valve element configured for switching between an open state of the VPI valve and a closed state of the VPI valve and configured for switching to the closed state in response to pressure, wherein at the open state the valve element allows fluid flow between a vacuum pump and a vacuum chamber via the inlet interior, and at the closed state the valve element blocks fluid flow between the vacuum pump and the vacuum chamber; anda pilot valve configured for communicating with the inlet interior and an internal exhaust gas line of the vacuum pump, the pilot valve switchable between an open pilot valve position and a closed pilot valve position, wherein at the open pilot valve position the pilot valve allows exhaust gas from the internal exhaust gas line to apply a pressure to the valve element effective to switch the valve element to the closed state, and at the closed pilot valve position the pilot valve blocks exhaust gas flow from the internal exhaust gas line to the valve element.2. The VPI valve of claim 1 , comprising a valve seat disposed in the inlet interior claim 1 , wherein the valve ...

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Номер записи: 71

01-03-2018 дата публикации

ELECTRIC COMPRESSOR, CONTROL DEVICE, AND MONITORING METHOD

Номер: US20180058454A1

Автор: NAKAGAMI Takashi, TAKASHIGE Takayuki

Принадлежит: MITSUBISHI HEAVY INDUSTRIES AUTOMOTIVE THERMAL SYSTEMS CO., LTD.

This electric compressor includes a compressor which rotates around an axis to compress a fluid, a motor which rotatably drives the compressor around the axis, and a control unit having a first component and a second component and controlling current supply to the motor during driving using the first component and the second component. An allowable current when the first component and the second component are exposed to the same temperature is set to be smaller in the second component than in the first component. The second component is disposed at a place in which cooling capability is greater than that of the first component so that allowable power of the second component at rated use is set to be greater than an allowable power of the first component. This electric compressor includes a temperature sensor which detects the temperature of the first component and a calculation unit which outputs an alarm signal when the temperature detected by the temperature sensor and a current flowing in the first component satisfy a predetermined condition. 1. An electric compressor comprising:a compressor which rotates around an axis to compress a fluid;a motor which rotatably drives the compressor around the axis; anda control unit including a first component and a second component and controlling current supply to the motor during driving using the first component and the second component, whereinan allowable current when the first component and the second component are exposed to the same temperature is set to be smaller in the second component than in the first component,the second component is disposed at a place in which cooling capability is greater than that of the first component so that allowable power of the second component at rated use is set to be greater than allowable power of the first component, andthe electric compressor further comprises:a temperature sensor which detects a temperature of the first component; anda calculation unit which outputs an alarm ...

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Номер записи: 72

02-03-2017 дата публикации

MOTOR-DRIVEN COMPRESSOR

Номер: US20170058898A1

Автор: Kawamura Shinichi, KAWASHIMA Takashi

Принадлежит: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI

A motor-driven compressor includes an electric motor including a rotor, a housing, a compression unit, a drive circuit, and a controller. The controller includes a deceleration controller that performs a deceleration control, which decelerates the rotor, during a first period in response to the rotor being rotating in a direction opposite to the forward direction, and a continuation controller that performs a continuation control, which continues the rotation of the rotor, during a second period that is longer than the first period after the deceleration control is performed. A fluctuation difference of a rotational frequency of the rotor during the continuation control is less than a deceleration rotational frequency difference. 1. A motor-driven compressor comprising:an electric motor including a rotor;a housing including a suction port that draws in a fluid;a compression unit driven by the electric motor, wherein the compression unit compresses an intake fluid, which is the fluid drawn in from the suction port, and discharges a compressed fluid, which is the compressed intake fluid;a drive circuit that drives the electric motor; anda controller that controls the drive circuit to control rotation of the rotor, wherein a fixed scroll fixed to the housing,', 'a movable scroll engaged with the fixed scroll and configured to orbit the fixed scroll, and', 'a compression chamber defined by the fixed scroll and the movable scroll,, 'the compression unit includes'}when the rotor rotates in a predetermined forward direction, the movable scroll orbits in the forward direction, and the compression unit thereby compresses the intake fluid drawn into the compression chamber,the motor-driven compressor further comprises an injection port that draws an intermediate pressure fluid into the compression chamber, wherein the intermediate pressure fluid has a pressure that is higher than the intake fluid and lower than the compressed fluid, a deceleration controller that performs a ...

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Номер записи: 73

02-03-2017 дата публикации

MOTOR-DRIVEN COMPRESSOR

Номер: US20170058899A1

Автор: ICHIHARA Akimitsu, Kawamura Shinichi, KAWASHIMA Takashi

Принадлежит: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI

A motor-driven compressor includes a three-phase motor including a rotor, a housing, a compression unit, a drive circuit, and a controller. The drive circuit includes u-phase upper and lower arm switching elements, v-phase upper and lower arm switching elements, and w-phase upper and lower arm switching elements. The controller performs a deceleration control in response to the rotor being rotating in a direction opposite to the forward direction. The controller controls the drive circuit in a switching control mode that includes a first mode, in which one or more switching elements of the upper and lower arm switching elements of the three phases are activated while the remaining switching elements are deactivated, and a second mode, which differs from the first mode in a combination of the activated and deactivated switching elements. 1. A motor-driven compressor comprising:a three-phase motor including a rotor;a housing including a suction port that draws in a fluid;a compression unit driven by the three-phase motor, wherein the compression unit compresses an intake fluid, which is the fluid drawn in from the suction port, and discharges a compressed fluid, which is the compressed intake fluid;a drive circuit that drives the three-phase motor; anda controller that controls the drive circuit, wherein a fixed scroll fixed to the housing,', 'a movable scroll engaged with the fixed scroll and configured to orbit the fixed scroll, and', 'a compression chamber defined by the fixed scroll and the movable scroll,, 'the compression unit includes'}when the rotor rotates in a predetermined forward direction, the movable scroll orbits in the forward direction, and the compression unit thereby compresses the intake fluid drawn into the compression chamber,the motor-driven compressor further comprises an injection port that draws an intermediate pressure fluid into the compression chamber, wherein the intermediate pressure fluid has a pressure that is higher than the intake ...

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Номер записи: 74

22-05-2014 дата публикации

COMPRESSOR WITH SERVICE VALVE ASSEMBLY

Номер: US20140140876A1

Автор: Bingham Larry L., REINHART KEITH J.

Принадлежит: EMERSON CLIMATE TECHNOLOGIES, INC.

A scroll machine according to the present disclosure can include a shell, a first scroll member, a second scroll member and a valve assembly. The valve assembly can permit intermediate pressure in the shell to flow to an area of suction pressure in the shell. The valve assembly can include a first valve manifold that selectively couples to the shell. A second valve manifold can slidably and non-threadably locate against the first valve manifold. A retainer can couple to the first valve manifold to capture the second valve manifold against the first valve manifold. A valve can selectively connect an intermediate flow exiting the shell through the first and second valve manifolds to a suction flow entering the shell. 1. A scroll machine comprising:a shell;a first scroll member disposed in the shell and having a first spiral wrap;a second scroll member disposed in the shell and having a second spiral wrap, the second spiral wrap being intermeshed with the first spiral wrap; a first valve manifold that selectively couples to the shell;', 'a second valve manifold that slidably and non-threadably locates against the first valve manifold;', 'a retainer that couples to the first valve manifold to capture the second valve manifold against the first valve manifold; and', 'a valve that selectively connects an intermediate flow exiting the shell through the first and second valve manifolds and to a suction flow entering the shell., 'a valve assembly that permits intermediate pressure in the shell to flow to an area of suction pressure in the shell, the valve assembly comprising2. The scroll machine of wherein the valve comprises a first valve and a second valve.3. The scroll machine of wherein the first valve and the second valve are solenoid actuated.4. The scroll machine of wherein the first valve manifold is threadably coupled to a cylinder mount on the shell.5. The scroll machine of wherein the retainer is threadably coupled to the first valve manifold.6. The scroll machine ...

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Номер записи: 75

17-03-2022 дата публикации

Method for controlling a rotary screw compressor

Номер: US20220082100A1

Автор: Ulrich Thomes

Принадлежит: GARDNER DENVER DEUTSCHLAND GmbH

The invention relates to a method for controlling a rotary screw compressor, having at least a first and a second air-end, wherein both air-ends are driven separately from one another and speed controlled. According to the invention, the following steps are carried out: detection of a volume flow taken at the outlet of the second air-end; adjustment of the rotational speed of both air-ends, when the removed volume flow fluctuates in a range between a maximum value and a minimum value; opening of a pressure-relief valve, if the volume flow falls below the minimum value; and reduction of the rotational speed of at least the first air-end to a predetermined idling speed (V1L) to reduce the volumetric flow delivered by the first to the second air-end.

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Номер записи: 76

08-03-2018 дата публикации

Pump monitoring apparatus and method

Номер: US20180066658A1

Автор: Laurent Marc Philippe

Принадлежит: Edwards Ltd

A monitoring apparatus comprises at least one sensor for measuring a current of the electric motor to generate a time-based signal and at least one electronic processor configured to transform the time-based signal into a frequency-based signal and to analyse the frequency-based signal to identify a signal pattern representing a pump fault condition. By monitoring the frequency-based signal, the monitoring apparatus can identify a pump fault condition.

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Номер записи: 77

27-02-2020 дата публикации

Asymmetrical scroll compressor

Номер: US20200063737A1

Автор: Atsushi Sakuda, Hiroaki Nakai

Принадлежит: Panasonic Intellectual Property Management Co Ltd

In an asymmetrical scroll compressor, at least one injection port through which an intermediate-pressure refrigerant is injected into a first compression chamber and a second compression chamber, at least one injection port penetrating an end plate of a fixed scroll at a position where the injection port is open to the first compression chamber or the second compression chamber during a compression stroke after a suction refrigerant is introduced and closed. Further, the amount of a refrigerant injected from an injection port into the first compression chamber is made more than the amount of a refrigerant injected from the injection port into the second compression chamber.

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Номер записи: 78

09-03-2017 дата публикации

Air Compressor

Номер: US20170067465A1

Автор: OSHIRO Ryusuke

Принадлежит:

To provide an air compressor capable of achieving energy saving. The air compressor is provided with a compressor body compressing air with injecting oil into a compression chamber; an air-pressure-operated intake throttle valve provided on an intake side of the compressor body; a separator provided on a delivery side of the compressor body and separating, from the compressed air delivered from the compressor body, a liquid contained in the compressed air; a compressed air system supplying the compressed air separated by the separator to a supply destination; an air release system connected to a primary side of a check valve in the compressed air system; an air-pressure-operated air release valve provided in the air release system; and an air-pressure operation circuit having a solenoid-operated three-way valve. 1. An air compressor comprising:a compressor body compressing air with injecting a liquid into a compression chamber;an air-pressure-operated intake throttle valve provided on an intake side of the compressor body;a separator provided on a delivery side of the compressor body, the separator separating, from the compressed air delivered from the compressor body, the liquid contained in the compressed air;a compressed air system supplying the compressed air separated by the separator to a supply destination;a check valve provided in the compressed air system;an air release system connected to a primary side of the check valve in the compressed air system;an air-pressure-operated air release valve provided in the air release system;an air-pressure operation circuit that has at least one solenoid-operated three-way valve, selects one of the primary side of the check valve in the compressed air system and a primary side of the intake throttle valve to make the selected primary side communicate with an operation chamber of the intake throttle valve, and selects one of the primary side of the check valve in the compressed air system and the primary side of the ...

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Номер записи: 79

17-03-2016 дата публикации

COMPRESSOR WITH FLOODED START CONTROL

Номер: US20160076542A1

Автор: PHAM Hung M.

Принадлежит: EMERSON CLIMATE TECHNOLOGIES, INC.

A system and method for flooded start control of a compressor having a crankcase heater are provided. A control module receives sensed data from a sensor, determines a current rate of liquid migration into the compressor, and compares the current rate with first and second predetermined thresholds. The control module operates the compressor in a flooded-start control mode, including operating the compressor according to at least one cycle with a first time period when the compressor is on and a second time period when the compressor is off. The control module operates the compressor in the flooded start control mode when the current rate is greater than the first predetermined threshold, activates the crankcase heater when the current rate is between the first and second predetermined thresholds, and operates the compressor without the flooded start control mode when the current rate is less than the second predetermined threshold. 1. A system comprising:a compressor for a refrigeration system, the compressor having a crankcase heater;at least one sensor that generates sensed data corresponding to at least one condition of the refrigeration system;a control module that receives the sensed data from the at least one sensor, determines a current rate of liquid migration into the compressor, and compares the current rate of liquid migration with a first predetermined threshold and a second predetermined threshold, the first predetermined threshold being greater than the second predetermined threshold;wherein the control module operates the compressor in a flooded-start control mode, the flooded start control mode including operating the compressor according to at least one cycle including a first time period during which the compressor is on and a second time period during which the compressor is off; andwherein the control module operates the compressor in the flooded start control mode in response to the current rate of liquid migration being greater than the first ...

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Номер записи: 80

05-06-2014 дата публикации

INTERNAL GEAR PUMP

Номер: US20140154119A1

Автор: IZUTSU Masato, Miyajima Junichi, Watanabe Takatoshi

Принадлежит: YAMADA MANUFACTURING CO., LTD

The internal gear pump includes: an inner rotor; an outer rotor that rotates by having predetermined eccentricity to a rotation center of the inner rotor; an outer ring that holds the outer rotor in a freely rotatable state, and is also formed with at least three cam protruded parts; a pump housing having a rotor chamber; protruded-wall surface parts that are formed on an inner periphery side surface of the rotor chamber and are also formed in the same number as that of the cam protruded parts; and operation means for oscillating the outer ring. A diameter center of the holding-inner peripheral part of the outer ring is moved by the operation means along a locus of a circle of which a radius is the eccentricity to the rotation center of the inner rotor. 1. An internal gear pump comprising:an inner rotor;an outer rotor that rotates by having predetermined eccentricity to a rotation center of the inner rotor;an outer ring that includes a holding-inner peripheral part which holds the outer rotor in a freely rotatable state, and at least three cam protruded parts formed along a circumferential direction of an outer periphery surface of the outer ring;a pump housing that has a rotor chamber in which the outer ring is freely oscillatably arranged;protruded-wall surface parts that are formed on an inner periphery side surface of the rotor chamber, are formed in the same number as that of the cam protruded parts, and are always brought into contact with the cam protruded parts; andoperation means for oscillating the outer ring, whereinpositions of the protruded-wall surface parts are set so that a diameter center of the holding-inner peripheral part of the outer ring is moved by the operation means along a locus of a circle of which a radius is the eccentricity to the rotation center of the inner rotor.2. The internal gear pump according to claim 1 , wherein in contacting and sliding between the protruded-wall surface parts and the cam protruded parts claim 1 , the ...

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Номер записи: 81

05-06-2014 дата публикации

Scroll Pump

Номер: US20140154123A1

Автор: Hockliffe Miles Geoffery, Holbrook Alan Ernest Kinnaird, Stones Ian David

Принадлежит: EDWARDS LIMITED

The present invention relates to a scroll pump with two scrolls that are co-operable for pumping fluid from an inlet to an outlet on relative orbiting motion of the scrolls. Each scroll comprises a scroll base from which a scroll wall extends generally axially towards the base of the opposing scroll. A gas conduit having an inlet at a first location of the pumping channel and an outlet at a second location of the pumping channel allows over-compression at the first location of the pumping channel to be exhausted to the second location of the pumping channel. A one-way valve located in the gas conduit allows the passage of gas through the conduit from the conduit inlet to the conduit outlet when a predetermined pressure differential between the first and second locations of the pumping channel is generated during roughing when the scroll inlet is at or close to atmosphere. 1. A vacuum pump comprising a scroll pumping mechanism which comprises:two scrolls which are co-operable for pumping gas along a pumping channel from a scroll inlet to a scroll outlet of the mechanism on relative orbiting motion of the scrolls,a gas conduit having an inlet at a first location of the pumping channel and an outlet at a second location of the pumping channel for allowing over-compression of gas above atmosphere at the first location of the pumping channel to be exhausted to the second location of the pumping channel, anda one-way valve arrangement located in the gas conduit for allowing the passage of gas through the conduit from the conduit inlet to the conduit outlet only when a predetermined pressure differential between the first and second locations of the pumping channel is generated during roughing when the scroll inlet is at or close to atmosphere.2. The vacuum pump as claimed in claim 1 , wherein in a first condition of the pump during roughing when the scroll inlet is at or close to atmosphere the valve arrangement is closed claim 1 , in a second condition when a ...

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Номер записи: 82

24-03-2022 дата публикации

VACUUM PUMPING

Номер: US20220090592A1

Автор: Roberts Brian Stuart Blakeley, Shelley Gerald Robin, Stammers Peter George

Принадлежит:

A vacuum pumping apparatus may include: a common pumping line having a plurality of pumping line inlets and a pumping line outlet, each pumping line inlet being configured to couple with an outlet of an associated plurality of vacuum processing chambers; at least one primary vacuum pump in fluid communication with the pumping line outlet to pump gas from each vacuum processing chamber; and control logic operable to control operation of the primary vacuum pump in response to an indication of an operating state of the plurality of vacuum processing chambers. In this way, the performance of the primary vacuum pump can be adjusted to match the load provided by the processing chambers and when there is an excess capacity, the performance of the primary vacuum pumps can be reduced, which can lead to significant energy savings and reduce wear on the pump. 1. A vacuum pumping apparatus comprising:a common pumping line having a plurality of pumping line inlets and a pumping line outlet, each pumping line inlet being configured to couple with an outlet of an associated plurality of vacuum processing chambers;at least one primary vacuum pump in fluid communication with the pumping line outlet to pump gas from each vacuum processing chamber; andcontrol logic operable to control operation of the at least one primary vacuum pump in response to an indication of an operating state of the plurality of vacuum processing chambers.2. The apparatus of claim 1 , wherein the control logic is operable to vary an operating speed of the at least one primary vacuum pump in response to the indication.3. The apparatus of claim 1 , wherein the control logic is operable to vary the operating speed to match a gas pumping rate of the at least one primary vacuum pump to an indicated gas flow rate from the plurality of vacuum processing chambers.4. The apparatus of claim 1 , wherein the at least one primary vacuum pump comprises a plurality of primary vacuum pumps and wherein the control logic is ...

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Номер записи: 83

18-03-2021 дата публикации

ELECTRONIC CAPACITY CONTROL VALVE FOR PORTABLE SCREW COMPRESSOR

Номер: US20210079915A1

Автор: BATDORFF Jonathan D., DODEN Ralph, VAUGHN Christian

Принадлежит:

A spiral valve and a screw compressor having a compressor housing and the spiral valve are provided. The spiral valve includes an actuator module disposed adjacent an exterior of the compressor housing, the actuator module includes an electric motor, a gearbox mechanically coupled to the electric motor to transmit torque from the electric motor, a shutter coupled to the gearbox to rotate in response to a transmitted torque from the electric motor, wherein the shutter is positioned to open and close one or more of a plurality of bypass ports formed in the compressor housing based on the rotational position of the shutter, wherein the compression length of the screw compressor may be controlled by controlling the opening and closing of the one or more bypass ports. 1. A spiral valve for a screw compressor having a compressor housing , the spiral valve comprising: an electric motor;', 'a gearbox mechanically coupled to the electric motor to transmit a torque from the electric motor;, 'an actuator module disposed adjacent an exterior of the compressor housing, the actuator module comprisinga shutter coupled to the gearbox to rotate in response to the transmitted torque from the electric motor, wherein the shutter is positioned to open and close one or more of a plurality of bypass ports formed in the compressor housing based on a rotational position of the shutter,wherein a compression length of the screw compressor may be controlled by controlling the opening and closing of the one or more bypass ports.2. The spiral valve of claim 1 , wherein the plurality of bypass ports includes a first bypass port and a second bypass port adjacent to the first bypass port;within a distance between the first bypass port and the second bypass port is less than 120% of a manufacturing tolerance of the compressor housing, and greater than or equal to 100% of the manufacturing tolerance of the compressor housing.3. The spiral valve of claim 1 , wherein the plurality of bypass ports ...

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Номер записи: 84

14-03-2019 дата публикации

Scroll compressor with bypass portions

Номер: US20190078567A1

Автор: Cheolhwan Kim, Inho Won, Yongkyu Choi

Принадлежит: LG ELECTRONICS INC

There is disclosed a scroll compressor according to the present disclosure in which a discharge port is formed at a central portion thereof, and a pair of two compression chambers continuously moving toward the discharge port are formed, and a plurality of bypass portions are formed at each interval along a movement path of each compression chamber in the both compression chambers, and compression gradients of the both compression chambers are formed to be different from each other, wherein when an interval between a bypass portion closest to the discharge port and another bypass portion adjacent to the bypass portion among the bypass portions of each compression chamber is defined as a first interval, respectively, a first interval of a second bypass portion belonging to a compression chamber having a relatively larger compression gradient is formed to be smaller than that of a first bypass portion belonging to the other compression chamber between the both compressor chambers.

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Номер записи: 85

02-04-2015 дата публикации

MOTOR-DRIVEN COMPRESSOR

Номер: US20150093254A1

Автор: FUKASAKU Hiroshi, NAGATA Yoshiki

Принадлежит: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI

A motor-driven compressor includes a compression portion, an electric motor, a motor drive circuit having switching element, a temperature detector, and a switcher, which switches the drive mode of the motor drive circuit. When acquiring information indicating that the temperature detected by the temperature detector has increased and reached a first preset temperature, the switcher switches the drive mode of the motor drive circuit from a first drive mode to a second drive mode. Also, when acquiring information indicating that the temperature detected by the temperature detector has increased and reached a second preset temperature, which is higher than the first preset temperature, the switcher switches the drive mode of the motor drive circuit from the first drive mode or the second drive mode to a third drive mode. 1. A motor-driven compressor comprising:a compression portion;an electric motor, which drives the compression portion;a motor drive circuit, which drives the electric motor, wherein the motor drive circuit has a switching element for converting a DC voltage into an AC voltage;a temperature detector, which detects a temperature of the switching element; anda switcher, which switches a drive mode of the motor drive circuit to one of a first drive mode, a second drive mode, and a third drive mode, which are determined by a carrier frequency and modulation control, whereinwhen acquiring information indicating that the temperature detected by the temperature detector has increased and reached a first preset temperature, the switcher switches the drive mode of the motor drive circuit from the first drive mode to the second drive mode, andwhen acquiring information indicating that the temperature detected by the temperature detector has increased and reached a second preset temperature, which is higher than the first preset temperature, the switcher switches the drive mode of the motor drive circuit from the first drive mode or the second drive mode to the ...

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Номер записи: 86

29-03-2018 дата публикации

Active clearance management in screw compressor

Номер: US20180087509A1

Автор: Jay H. Johnson, Steven LOTSPAIH

Принадлежит: Trane International Inc

A compressor includes a housing defining a working chamber. The housing further includes a bore and an endplate disposed toward a discharge end. The compressor further includes a rotor having helical threads, the rotor being configured to be housed in the bore, a rotor clearance, a controllable bearing supporting the rotor, and a controller configured to control the controllable bearing such that the controllable bearing moves the rotor in a manner to reduce and/or enlarge the rotor clearance.

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Номер записи: 87

30-03-2017 дата публикации

Compressor Having Oil-Level Sensing System

Номер: US20170089340A1

Автор: AHIRE Pankaj, BROSTROM Troy Richard, JAGDALE Prashant Ramesh, JORWEKAR Pavankumar Pralhad, Juge Vinayak Madanrao

Принадлежит: EMERSON CLIMATE TECHNOLOGIES, INC.

A compressor may include a shell containing a motor, a compression mechanism and a lubricant sump. The compressor may also include first and second temperature sensors, and a control module. The first temperature sensor may be at least partially disposed within the lubricant sump and may measure a first temperature of a lubricant at a first position. The second temperature sensor may be at least partially disposed within the lubricant sump and may measure a second temperature of the lubricant at a second position that is vertically higher than the first position. The control module is in communication with the first and second temperature sensors. The control module may determine a first difference between the first temperature and the second temperature. The control module may determine whether a liquid level of the lubricant in the lubricant sump is below a predetermined level based on the first difference. 1. A compressor comprising:a shell including a motor, a compression mechanism and a lubricant sump;a first temperature sensor at least partially disposed within said lubricant sump and configured to measure a first temperature of a lubricant at a first position;a second temperature sensor at least partially disposed within said lubricant sump and configured to measure a second temperature of said lubricant at a second position that is vertically higher than said first position; anda control module in communication with said first and second temperature sensors, said control module configured to determine a first difference between the first temperature and the second temperature, said control module configured to determine whether a liquid level of said lubricant in said lubricant sump is below a predetermined level based on said first difference.2. The compressor of claim 1 , wherein a vertical height of said second position is equal to a vertical height of said predetermined level.3. The compressor of claim 1 , wherein said predetermined level equals a ...

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Номер записи: 88

05-05-2022 дата публикации

SCROLL COMPRESSOR

Номер: US20220136500A1

Автор: Imai Tetsuya, SATO Taizo

Принадлежит: SANDEN AUTOMOTIVE COMPONENTS CORPORATION

[Problem] A scroll compressor is provided which is capable of effectively reducing a pressure loss in a pathway extending from a discharge space to a discharge port.

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Номер записи: 89

05-05-2022 дата публикации

COMPRESSOR AND AIR CONDITIONING SYSTEM

Номер: US20220136507A1

Автор: BI Yushi, CAO CONG, Hou Furong, MENG Qiangjun, ZHUO Mingsheng

Принадлежит:

A compressor and an air conditioning system. The compressor includes two compressing structures and an intermediate gas supplement structure. A communication pipe is provided between a gas exhaustion port of one compressing structure and a gas suction port of another compressing structure in the two compressing structures. The intermediate gas supplement structure is in communication with the communication pipe. At least one compressing structure is provided with a gas supplement structure. In the compressor and the air conditioning system, the gas supplement structure is provided to at least one compressing structure, so that at least two levels of gas supplement to the compressor are provided.

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Номер записи: 90

05-05-2022 дата публикации

HEAT PUMP DEVICE, HEAT PUMP SYSTEM, AIR CONDITIONER, AND REFRIGERATION MACHINE

Номер: US20220136753A1

Автор: UEMURA Keisuke, Yamakawa Takashi

Принадлежит:

A heat pump device includes a compressor that compresses refrigerant, a motor that drives the compressor, an inverter that applies a desired voltage to the motor, and an inverter controlling unit that generates a pulse width modulation signal for driving the inverter, has, as operation modes, a heating operation mode performing heating operation of the compressor and a normal operation mode performing normal operation of the compressor to compress the refrigerant, and periodically changes carrier frequency, that is frequency of a carrier signal, in the heating operation mode.

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Номер записи: 91

19-03-2020 дата публикации

METHOD AND APPARATUS FOR PRESSURE EQUALIZATION IN ROTARY COMPRESSORS

Номер: US20200088196A1

Автор: Ayub Shawket, Ullrich Brandon

Принадлежит: Lennox Industries Inc.

A high side compressor system includes a compressor housing, motor, and a compression chamber. The compression chamber is disposed within the compressor housing. An accumulator is fluidly coupled to the compressor housing via a pressure-equalization tube. A pressure-equalization valve is disposed in the pressure-equalization tube. The pressure-equalization valve closes access to the pressure-equalization tube responsive to an electrical current being applied to the pressure-equalization valve. The pressure-equalization valve is electrically coupled to a compression mechanism such that interruption of electrical current to the compression mechanism interrupts electrical current to the pressure-equalization valve thereby opening the pressure-equalization valve 1. A rotary compressor system comprising:a motor disposed within a compressor housing;an accumulator fluidly coupled to the compressor housing via a pressure-equalization tube;a pressure-equalization valve disposed in the pressure-equalization tube to limit refrigerant flow through the pressure-equalization tube;wherein the pressure-equalization valve is configured to control access to the pressure-equalization tube responsive to whether an electrical current is applied to the pressure-equalization valve;responsive to a determination that the electrical current is applied to the pressure-equalization valve, the pressure-equalization valve closes access to the pressure-equalization tube; andwherein the pressure-equalization valve is electrically coupled to the motor such that interruption of the electrical current to the motor interrupts the electrical current to the pressure-equalization valve thereby opening the pressure-equalization valve.2. The rotary compressor system of claim 1 , wherein the pressure-equalization valve is located outside the compressor housing.3. The rotary compressor system of claim 2 , wherein the pressure-equalization valve is electrically coupled to the compressor housing via a terminal ...

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Номер записи: 92

05-04-2018 дата публикации

Device for detecting a non-optimal lubrication condition in a compressor of a refrigeration system, a compressor unit which comprises the device and a method for detecting a non-optimal lubrication condition in a compressor of a refrigeration system

Номер: US20180094636A1

Автор: Andrea Dalan, Umberto BIANCHINI

Принадлежит: Carel Industries SpA

1. A device ( 10 ) for detecting a non-optimal lubrication condition in a compressor ( 100 ) of a refrigeration system ( 1000 ), which comprises a transducer unit ( 11 ) designed to detect sound vibrations and emit an electrical signal as a function of the frequency of the sound vibrations. The device ( 10 ) is configured to be fixed to an external wall of a compressor ( 100 ) in such a way that, in use, the transducer unit ( 11 ) detects sound vibrations which are emitted by the said compressor ( 100 ). The transducer unit ( 11 ) is connectable to an electronic device for processing said electrical signal so as to signal if, in use, said frequency exceeds a predefined threshold that corresponds to a non-optimal lubrication condition of the compressor ( 100 ).

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Номер записи: 93

12-05-2022 дата публикации

COMPRESSOR AND REFRIGERATION CYCLE DEVICE HAVING THE SAME

Номер: US20220146171A1

Автор: JUNG Duhwa, PARK Soodol, Park Taejun, RYU Sihyeon

Принадлежит: SAMSUNG ELECTRONICS CO., LTD.

A refrigeration cycle device includes a compressor. The compressor includes a casing, a driving unit disposed in the casing, a compression unit coupled to the driving unit and configured to compress a refrigerant, and a valve configured to control a flow of the refrigerant in the casing. The valve includes a valve chamber including a main flow path in which the refrigerant is to flow, the main flow path including a refrigerant inlet and a refrigerant outlet. The valve also includes a floating body disposed in the valve chamber to open or close the main flow path, and a bypass flow path formed in the valve chamber and which is to be opened or closed by the floating body. When the driving unit is stopped and the bypass flow path is opened by the floating body, the refrigerant is to be detoured to the bypass flow path. 1. A compressor , comprising:a casing;a driving unit disposed in the casing;a compression unit, coupled to the driving unit, configured to compress a refrigerant; and a valve chamber including a main flow path, in which the refrigerant is to flow, the main flow path including a refrigerant inlet and a refrigerant outlet,', 'a floating body disposed in the valve chamber to open or close the main flow path, and', 'a bypass flow path, formed in the valve chamber, to be opened or closed by the floating body, and when the driving unit is stopped and the bypass flow path is opened by the floating body, to allow the refrigerant to be detoured to the bypass flow path., 'a valve configured to control a flow of the refrigerant in the casing, wherein the valve includes2. The compressor of claim 1 , whereinwhen the driving unit is operated, the floating body is configured to open the main flow path, andwhen the driving unit is stopped, the floating body is configured to close the main flow path and open the bypass flow path.3. The compressor of claim 2 , whereinthe bypass flow path includes a bypass inlet and a bypass outlet,when the driving unit is operated, the ...

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Номер записи: 94

14-04-2016 дата публикации

SCROLL COMPRESSOR

Номер: US20160102667A1

Автор: Imai Yusuke, Morimoto Takashi, Ogata Takeshi, Sakuda Atsushi, Shintaku Hidenobu, Yamada Sadayuki

Принадлежит: Panasonic Intellectual Property Management Co., Ltd.

A scroll compressor of the present invention includes a first discharge port which is in communication with a compression chamber , a discharge space H which is in communication with the first discharge port , a second discharge port which brings the discharge space H into communication with a high pressure space , a discharge check valve capable of closing the second discharge port , a bypass port which brings the compression chamber into communication with the discharge space H, and a bypass check valve capable of closing the bypass port , the fixed scroll can move in an axial direction of the fixed scroll between the partition plate and the main bearing , a high pressure is applied to the discharge space H and according to this, the fixed scroll can be pressed against the orbiting scroll 1. A scroll compressor comprising:a partition plate for partitioning an interior of a hermetic container into a high pressure space and a low pressure space;a fixed scroll which is adjacent to the partition plate;an orbiting scroll which is meshed with the fixed scroll and which forms compression chambers;a rotation-restraining member for preventing the orbiting scroll from rotating; anda main bearing for supporting the orbiting scroll, whereinthe fixed scroll, the orbiting scroll, the rotation-restraining member and the main bearing are placed in the low pressure space,the fixed scroll and the orbiting scroll are placed between the partition plate and the main bearing,the fixed scroll can move in an axial direction of the fixed scroll between the partition plate and the main bearing,the scroll compressor further includesa first discharge port which is formed in the fixed scroll and which is in communication with the compression chamber,a discharge space which is formed between the partition plate and the fixed scroll and which is in communication with the first discharge port,a second discharge port which is formed in the partition plate and which brings the discharge space into ...

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Номер записи: 95

23-04-2015 дата публикации

MODULATING CHECK VALVE

Номер: US20150107680A1

Автор: Chapman, JR. WALTER R., Swoger James W.

Принадлежит:

A modulating check valve and method of operating the modulating check valve adapted for mounting to an inlet of a compressor. The modulating check valve includes a flow section through which fluid flow. The flow section has an intake portal and an outlet portal connected to the inlet of the compressor. A flapper valve is disposed in the flow section to prevent backflow from the outlet portal to the intake portal. An actuator controls the flapper valve allowing the flapper valve to open, close and modulate the fluid flow from the intake portal to the outlet portal of the flow section in response to fluid pressure at an outlet of the compressor. 1. A modulating check valve adapted for mounting to an inlet of a compressor , comprising:a flow section, through which fluid flows, having an intake portal, an outlet portal connected to the inlet of the compressor;a flapper valve disposed in the flow section to prevent backflow from the outlet portal to the intake portal; andan actuator that controls the flapper valve so that the flapper valve opens, closes and modulates the fluid flow from the intake portal to the outlet portal of the flow section in response to fluid pressure at an outlet of the compressor.2. The modulating check valve of wherein the flow section comprises:a conduit having the intake portal at one end;a flapper valve closure section having a valve seat downstream of the intake portal;an intermediate section disposed downstream from the flapper valve closure section; andthe outlet portal disposed downstream to the intermediate section.3. The modulating check valve of wherein the flapper valve seals against the valve seat.4. The modulating check valve of wherein the compressor is a fluid compressor.5. The modulating check valve of further including a stem disposed within the actuator having a first end extending into the intermediate section of the conduit to movably engage the flapper valve.6. The modulating check valve of wherein:the flapper valve is a ...

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Номер записи: 96

04-04-2019 дата публикации

Variable Volume Ratio Compressor

Номер: US20190101120A1

Автор: Kirill M. Ignatiev, Michael M. Perevozchikov, Roy J. Doepker

Принадлежит: Emerson Climate Technologies Inc

A compressor may include a shell assembly, first and second scrolls, and a valve assembly. The shell assembly may define a discharge chamber. The first scroll may be disposed within the discharge chamber and may include a first end plate and a first spiral wrap. The first end plate may include a discharge passage in communication with the discharge chamber. The second scroll may be disposed within the discharge chamber and may include a second end plate and a second spiral wrap. The first and second spiral wraps define fluid pockets therebetween. The second end plate may include a port selectively communicating with one of the fluid pockets. The valve assembly may be mounted to the second scroll and may include a valve member that is movable between open and closed positions to allow and restrict communication between the port and the discharge chamber.

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Номер записи: 97

02-06-2022 дата публикации

SCROLL COMPRESSOR

Номер: US20220170461A1

Автор: Imai Tetsuya, INABA Hironobu, SATO Taizo

Принадлежит: SANDEN AUTOMOTIVE COMPONENTS CORPORATION

[Problem] A scroll compressor is provided which has improved workability when a back pressure chamber and a compression chamber are communicated with each other. 1. A scroll compressor which has a compression mechanism including a fixed scroll and a movable scroll respectively formed at surfaces of mirror plates with spiral laps facing each other , and in which the movable scroll is revolved and turned with respect to the fixed scroll to thereby compress a working fluid in a compression chamber formed between the laps of both scrolls , comprising:a back pressure chamber formed in a back surface of the mirror plate of the movable scroll; anda communication hole formed in the mirror plate of the movable scroll and communicating the back pressure chamber and the compression chamber with each other,wherein the communication hole is constituted of a large-diameter hole section located on the back pressure chamber side of the mirror plate of the movable scroll and a small-diameter hole section continuously extending from the large-diameter hole section to the compression chamber.2. The scroll compressor according to claim 1 , wherein the length dimension of the small-diameter hole section is smaller than the length dimension of the large-diameter hole section.3. A scroll compressor which has a compression mechanism including a fixed scroll and a movable scroll respectively formed at surfaces of mirror plates with spiral laps facing each other claim 1 , and in which the movable scroll is revolved and turned with respect to the fixed scroll to thereby compress a working fluid in a compression chamber formed between the laps of both scrolls claim 1 , comprising:a back pressure chamber formed in a back surface of the mirror plate of the movable scroll;a mounting hole formed in the mirror plate of the movable scroll and extending from the back pressure chamber to the compression chamber; anda communication member installed in the mountingwherein the communication member has a ...

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Номер записи: 98

02-06-2022 дата публикации

REFRIGERANT BYPASS SOLUTION

Номер: US20220170465A1

Автор: Yang Hongwei

Принадлежит:

Systems, methods, and computer-readable mediums are provided for improving the efficiency of a filter-type oil separator in a cooling system including a compressor that pumps a mixture of lubricating oil and refrigerant through the filter-type oil separator. The filter type oil separator is configured to receive a first portion of the mixture from the compressor, and a bypass line is configured to bypass a second portion of the mixture around the filter-type oil separator. The bypass line ensures a sufficient amount of oil is present in the compressor. 1. A system improving efficiency of a filter-type oil separator , the system comprising:a compressor configured to compress and pressurize a mixture of refrigerant and lubricant;a filter-type oil separator configured to receive a first portion of the compressed mixture of refrigerant and lubricant from the compressor; anda bypass line configured to bypass a second portion of the compressed mixture of refrigerant and lubricant around the filter-type oil separator.2. The system of claim 1 , further comprising:a bypass valve configured to receive the second portion of the mixture of refrigerant and lubricant and provide a bypass path around the filter-type oil separator for the second portion of the mixture.3. The system of claim 2 , wherein the bypass line includes the bypass valve.4. The system of claim 2 , further comprising: process one or more input signals;', 'determine a speed value of the compressor based on the one or more input signals; and', 'adjust the bypass valve based on the speed value., 'a controller configured to5. The system of claim 4 , wherein the compressor is a variable speed compressor; andthe one or more input signals represent a driving frequency of the compressor.6. The system of claim 4 , wherein the controller is configured to determine the speed value by calculating a value of refrigerant gas flow rate at a discharge side of the compressor and determining a correspondence between compressor ...

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Номер записи: 99

19-04-2018 дата публикации

Air compressor

Номер: US20180106184A1

Автор: Craig N. Hansen, Paul C. Cross

Принадлежит: Individual

A supercharged internal combustion engine has a supercharger operable to selectively supply a mass of air from below through above atmospheric air pressure according to the operating requirements of the engine. The supercharger has a shuttle combined with a throttle valve that controls the mass of air directed to an air mass bypass opening and supplied to the internal combustion engine. The shuttle has rollers that ride on rails that allow the shuttle to move to open and close the air mass bypass opening in communication with a casing that directs a mass of atmospheric air and a bypass mass of air interfused with the mass of atmospheric air to an air mass inlet of the supercharger.

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Номер записи: 100