Lubricant Separator Patents (Class 62/470)
  • Patent number: 10823470
    Abstract: A liquid accumulator for a heat exchange system, includes a liquid accumulator housing provided with an air inlet, an air outlet, and a liquid inlet; and a cooling heat exchanger disposed in the liquid accumulator housing, wherein the cooling heat exchanger comprises an inlet end, a main body part, and an outlet end in sequence; the inlet end of the cooling heat exchanger is connected to the air inlet on the liquid accumulator housing; and the outlet end of the cooling heat exchanger is arranged to be higher than a working liquid level of a refrigerant in the liquid accumulator.
    Type: Grant
    Filed: January 23, 2017
    Date of Patent: November 3, 2020
    Assignee: CARRIER CORPORATION
    Inventor: Lufei Wang
  • Patent number: 10627138
    Abstract: An air-conditioning apparatus includes firstly a refrigerant circuit in which a condenser, an expander, an evaporator, a compressor, and an oil separator are connected by pipes, and secondly an oil return circuit configured to return oil from the oil separator to the compressor. The compressor includes an oil concentration sensor configured to detect oil concentration inside the compressor. The oil return circuit includes multiple solenoid valves that are each opened or closed corresponding to the oil concentration detected by the oil concentration sensor.
    Type: Grant
    Filed: November 17, 2015
    Date of Patent: April 21, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventor: Shuhei Mizutani
  • Patent number: 10605504
    Abstract: A ducted separator in a compressor-based cooling assembly is connected to an oil/gas outlet of the compressor. The ducted separator is a pipe with at least one bend in it which collects oil in a manner which can achieve 98% oil carry over efficiency. The ducted separator may optionally be connected to a second phase separator such as a centrifugal cylinder. In that case, the height of the centrifugal cylinder can be significantly reduced compared with conventional arrangements. Alternatively, a simpler impingement surface such as one or more baffles may be used as the second phase separator or just a collection chamber.
    Type: Grant
    Filed: October 9, 2014
    Date of Patent: March 31, 2020
    Assignee: J&E HALL LIMITED
    Inventors: Terence William Thomas Young, John Michael Roll
  • Patent number: 10551135
    Abstract: According to one embodiment, a system includes a high side heat exchanger, a load, a compressor, and a horizontal oil separator. The high side heat exchanger is configured to remove heat from a refrigerant. The horizontal oil separator comprises a centrifugal chamber, an oil, a cut line, a filter, a collector, and an outlet. The centrifugal chamber is configured to receive the refrigerant from the compressor and rotate the refrigerant, wherein rotating the refrigerant separates an oil from the refrigerant. The cut line is configured to prevent the oil separated in the centrifugal chamber from combining with the refrigerant. The filter is configured to separate additional oil from the refrigerant. The collector is configured to collect the oil separated in the centrifugal chamber and the additional oil. The outlet is configured to discharge the refrigerant to the high side heat exchanger.
    Type: Grant
    Filed: February 9, 2018
    Date of Patent: February 4, 2020
    Assignee: Heatcraft Refrigeration Products, LLC
    Inventors: Xi Sun, Shitong Zha
  • Patent number: 10514187
    Abstract: A cycle enhancement apparatus is provided. The apparatus has a first side entrance line and exit line, both connected to a first side of a refrigerant line, and a second side entrance line and exit line, both connected to a second side of the refrigerant line. One-way valves prevent flow through the first side entrance line toward the first side, through the first side exit line away from the first side, through the second side entrance line toward the second side, and through the second side exit line away from the second side. The apparatus has a cycle enhancement line. The cycle enhancement line has an entrance portion, connected to the first side entrance line and the second side entrance line, an exit portion, connected to the first side exit line and the second side exit line, and a cycle enhancement between the entrance portion and the exit portion.
    Type: Grant
    Filed: October 2, 2017
    Date of Patent: December 24, 2019
    Assignee: Lennox Industries Inc.
    Inventor: Robert B. Uselton
  • Patent number: 10184701
    Abstract: The disclosed refrigerant system includes a compressor having a motor that is cooled by motor cooling fluid provided to the motor from the main refrigerant loop by a motor cooling circuit. The system also includes a sub-cooling circuit to cool the motor cooling fluid.
    Type: Grant
    Filed: May 8, 2012
    Date of Patent: January 22, 2019
    Assignee: DANFOSS A/S
    Inventors: Lin Sun, Paul D. Bishop, Huai Yu Lin, Jose Alvares, Ramesh Veerasurla
  • Patent number: 10081226
    Abstract: Disclosed are climate systems and methods for control the climate systems. A climate system includes a plurality of compressors arranged in parallel, a condenser disposed downstream of the compressors and an evaporator disposed downstream of the condenser. The compressors, the condenser, and the evaporator are fluidly connected by refrigerant lines to form a refrigerant circuit. The climate system also includes a controller that controls the operation of the compressors to draw back lubricant to the compressors without use of an oil equalization system.
    Type: Grant
    Filed: September 29, 2016
    Date of Patent: September 25, 2018
    Assignee: Bergstrom Inc.
    Inventors: Brett S. Connell, Brett Herrmann, Aaron D. Sullivan, Terry Zeigler
  • Patent number: 9366246
    Abstract: A compressor control apparatus and method, and a refrigerator including the same, are provided. In a refrigerator having two compressors, starting of two compressors may be staggered to reduce an effect of the suction pressure and discharge pressure between the two compressors, to provide for stable operation of the compressors, and improve reliability and power consumption.
    Type: Grant
    Filed: January 29, 2013
    Date of Patent: June 14, 2016
    Assignee: LG ELECTRONICS INC.
    Inventors: Jaeyoo Yoo, Taewoong Nah
  • Patent number: 9243827
    Abstract: A chiller system including an oil separator and ejector connection through which an oil is separated from a refrigerant discharged from a compressor at the oil separator, a portion of the refrigerant discharged from the compressor and an oil discharged from an evaporator are rejected by the ejector, and the separated oil and the ejected refrigerant and oil are heat exchanged, and return into the compressor.
    Type: Grant
    Filed: June 10, 2010
    Date of Patent: January 26, 2016
    Assignee: LG ELECTRONICS INC.
    Inventors: Byeong Su Kim, Jun Hyeon Hwang, Beom Chan Kim, Sang Hoon Yoo, Jung Wook Moon
  • Patent number: 9028707
    Abstract: A composition comprising a refrigerant and a lubricant is disclosed, wherein the refrigerant comprises (i) a fluorocarbon selected from the group consisting of R125, R134a, R32, R152a, R143a, R218 and mixtures thereof, and (ii) a hydrocarbon selected from the group consisting of propane, n-butane, isobutane, n-pentane, isopentane, dimethyl ether, and mixtures thereof; the lubricant comprises (iii) a hydrocarbon-based lubricant component; and (iv) a synthetic lubricant component; and the synthetic lubricant component is less than 30% by weight of the total lubricant. Also disclosed are methods of replacing refrigerants in refrigeration or air conditioning systems containing a refrigerant comprising a CFC or HCFC and a lubricant.
    Type: Grant
    Filed: September 3, 2010
    Date of Patent: May 12, 2015
    Assignee: E I du Pont de Nemours and Company
    Inventor: Barbara Haviland Minor
  • Publication number: 20150121946
    Abstract: A capacity-increasing device for a four-way valve, the four-way valve has a first port, a second port, a third port and a fourth port, wherein first port is connected with an output end of a compressor via a first line, second port is connected with an input end of the compressor via a second line, third port is connected with a first heat exchanger via a third line, and fourth port is connected with a second heat exchanger via a fourth line, the capacity-increasing device includes a first bypass line and a first valve, the first bypass line connected between third line and second line, the first valve in the first bypass line, a second bypass line and a second valve, the second bypass line connected between fourth line and second line, the second valve in the second bypass line.
    Type: Application
    Filed: December 12, 2012
    Publication date: May 7, 2015
    Inventors: Haijun Li, Pan Gao
  • Patent number: 9021830
    Abstract: A compressor (10, 200) for compressing refrigerant, having a power unit arranged in a power unit space (14) which is delimited at least partially by a power unit housing (12), having a suction gas volume (46) and having a high-pressure volume (48) is in fluid communication with the power unit space (14) via a second fluid connection (74), wherein the compressor furthermore has a first fluid connection (54, 254) which can be placed in or is in fluid communication with an oil-conducting volume (205) of a refrigeration plant or of the compressor (10, 200), wherein an oil separator (56) is arranged in the first fluid connection (54, 254).
    Type: Grant
    Filed: November 23, 2010
    Date of Patent: May 5, 2015
    Assignee: Gea Bock GmbH
    Inventors: Wolfgang Etter, Arno Goerlich
  • Patent number: 9022230
    Abstract: An oil separation device having an outer cylinder that extends in an axial direction; an inner cylinder that passes through the interior of the outer cylinder in the axial direction; a pair of end plates provided at both ends of the outer cylinder in the axial direction; an inlet port connected to the outer cylinder near one of the end plates and that introduces an oil-containing fluid discharged from a compressor into a space formed between the outer cylinder and the inner cylinder so as to swirl about the axis; an outlet port connected to the outer cylinder near the other end plate and that expels the fluid, from which the oil has been centrifugally separated, out of the space; and an oil discharge port, provided in the outer cylinder, for discharging the separated oil out of the space. A partition plate that extends over at least part of a cross-section perpendicular to the axial direction to partition the space in the axial direction is provided in the space.
    Type: Grant
    Filed: September 1, 2011
    Date of Patent: May 5, 2015
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Noriyuki Matsukura, Tatsuru Nagai
  • Patent number: 8966933
    Abstract: A refrigeration apparatus includes a multistage compression mechanism, switching mechanisms, intercoolers, oil separators, and a control unit. The multistage compression mechanism has one high-stage-side compression mechanism and a plurality of low-stage-side compression mechanisms connected in series. The switching mechanisms are connected to blow-out pipes of the low-stage-side compression mechanisms. The switching mechanisms switch between cooling and heating operation cycles. The intercoolers cool refrigerant blown out from the low-stage-side compression mechanisms during the cooling cycle. The oil separators are disposed between the switching mechanisms and the intercoolers. The oil separators separate lubricating oil from refrigerant blown out from the low-stage-side compression mechanisms during the cooling cycle. The control unit controls the multi-stage compression mechanism and the switching mechanisms.
    Type: Grant
    Filed: December 26, 2012
    Date of Patent: March 3, 2015
    Assignee: Daikin Industries, Ltd.
    Inventors: Tetsuya Okamoto, Kazuhiro Furusho, Ikuhiro Iwata, Guozhong Yang
  • Publication number: 20150052936
    Abstract: A sealed compressor includes a centrifugal impeller above a rotor to synchronously rotate. A refrigerant rises through a rotor air hole, flows in an upper space, and flows out from a discharge pipe. The centrifugal impeller includes an oil separation plate on the rotor, and plural vanes standing on the oil separation plate, and forms inter-vane flow passages between adjacent vanes, and a vane inner flow passage that guides refrigerant from the rotor air hole to inner entrances of the inter-vane flow passages. Outer exits of the inter-vane flow passages are disposed along an entire circumference, and refrigerant increased in pressure while passing through the inter-vane flow passages flows out from the outer exits to the upper space. The oil separation plate closes a short-circuit passage through which the refrigerant directly flows from the vane inner flow passages to the discharge pipe without passing through the inter-vane flow passages.
    Type: Application
    Filed: January 16, 2013
    Publication date: February 26, 2015
    Applicant: Mitsubishi Electric Corporation
    Inventors: Tetsuhide Yokoyama, Shogo Moroe, Yoshinori Shirafuji, Teruhiko Nishiki, Taro Kato, Hideaki Maeyama, Hiroki Nagasawa, Keisuke Shingu
  • Publication number: 20150052915
    Abstract: The invention relates to a cooling system (2) and a method for oil separation, where a condenser unit (10) contains an oil separator (18,20), from which oil separator oil is lead through a pipeline (24) and back to the compressor (4). It is an object of the invention to collect all condensing functions and oil separation functions into a common pressure container (26). According to the invention, this objective is achieved by a system, the condenser unit and oil separator are integrated in a common pressure tank (26) that contains at least one first oil separator and at least a second secondary oil separator, which pressure tank contains a condenser container (30) which interacts with a third oil separator (22). Hereby, it is attained that condensation and oil separation are integrated in a common pressure tank.
    Type: Application
    Filed: March 5, 2013
    Publication date: February 26, 2015
    Applicant: Danarctica ApS
    Inventor: Flemming Clarence Larsen
  • Patent number: 8955323
    Abstract: To improve the exhaust heat recovery efficiency, a compressor includes a heat exchanger for cooling a gas, coolant, water, or oil heated by the compressor during compressor operation by heat exchange with a working fluid, for circulating the working fluid of a Rankine cycle. The Rankine cycle is implemented by the heat exchanger, an expander, a condenser, and a circulating pump to circulate the working fluid through the cycle.
    Type: Grant
    Filed: July 1, 2010
    Date of Patent: February 17, 2015
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventor: Yuji Kamiya
  • Patent number: 8931303
    Abstract: A refrigerating air-conditioning apparatus, at least provided with no possibility that a foreign material returns to a compressor from an accumulator at a time of the pipeline-cleaning operation firstly, and provided with a possibility to perform a collecting operation for the foreign material in a short time secondary, is provided. The heat-source side unit includes an accumulator provided with a function to separate and collect the foreign material in an existing pipeline, a collecting container for collecting the foreign material separated by the accumulator, and an oil return pipeline for returning refrigerating machine oil to the compressor via a flow amount adjusting device, installed at a lower portion of the accumulator, and at a time of ordinary cooling or heating operation, the refrigerating machine oil is caused to flow into the oil return pipeline, and at a time of pipeline cleaning and foreign material-collecting operations, the flow amount adjusting device is fully closed.
    Type: Grant
    Filed: August 26, 2011
    Date of Patent: January 13, 2015
    Assignee: Mitsubishi Electric Corporation
    Inventors: Masaki Toyoshima, Susumu Yoshimura, Shinichi Wakamoto, Osamu Morimoto
  • Patent number: 8899073
    Abstract: A refrigerant storage device that arranges two end plates to form a cavity and includes a turbulator plate within the cavity. The turbulator plate is arranged within the cavity to reinforce the cavity by providing a plurality of reinforcement portions between the end plates. The cavity is sized and the turbulator plate is configured so a liquid portion of refrigerant flowing through the cavity collects onto the turbulator plate. The device has a rectangular shape that simplifies vehicle packaging and allows the device to be readily integrated into a plate-type refrigerant-to-liquid coolant heat exchanger. The device is formed by a stacking arrangement of parts that provides for a readily scalable design.
    Type: Grant
    Filed: December 14, 2011
    Date of Patent: December 2, 2014
    Assignee: Delphi Technologies, Inc.
    Inventors: Gary Scott Vreeland, Frederick Vincent Oddi
  • Publication number: 20140345317
    Abstract: A temperature control apparatus (70) includes a heat exchanger (71) configured to exchange heat with the surroundings using a phase change of a refrigerant, a rotary pump (73) configured to receive the refrigerant from the heat exchanger (71) and fuse the refrigerant with oil contained inside the rotary pump, and an oil water separator (74) configured to receive the refrigerant fused with the oil from the rotary pump (73) and separate the refrigerant from the oil. The temperature control apparatus further includes a refrigeration cycle that implements a cooling function by circulating the refrigerant separated from the oil back to the heat exchanger (71).
    Type: Application
    Filed: November 9, 2012
    Publication date: November 27, 2014
    Inventors: Yasuharu Sasaki, Kazuyoshi Matsuzaki
  • Publication number: 20140331699
    Abstract: A refrigeration cycle device includes: a compressor that constitutes a refrigeration cycle and compresses a supplied refrigerant; a refrigerant-retaining container that retains the refrigerant into which lubricating oil for the compressor is mixed, and which separates the gas refrigerant from the liquid refrigerant, and sends out the gas refrigerant to the compressor; a refrigerant conveying pump that conveys a fluid mixture including the liquid refrigerant and the lubricating oil retained in the refrigerant-retaining container; and an internal heat exchanger that changes the liquid refrigerant conveyed out from the refrigerant-retaining container by the refrigerant conveying pump to the gas refrigerant, and provides the compressor with the gas refrigerant together with the lubricating oil. Since the refrigerant conveying pump conveys the fluid mixture containing the liquid refrigerant and the lubricating oil retained in a refrigerant-retaining container, stable operation is possible.
    Type: Application
    Filed: November 30, 2011
    Publication date: November 13, 2014
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Shinya Higashiiue
  • Publication number: 20140331712
    Abstract: An air-conditioning apparatus capable of storing a surplus of refrigerating machine oil and returning a necessary amount of the refrigerating machine oil to a compressor as required. In an air-conditioning apparatus, a controller determines the amount of refrigerating machine oil that is present in a compressor by measuring power of the compressor and controls opening and closing of a solenoid valve on the basis of the measurement results.
    Type: Application
    Filed: June 13, 2012
    Publication date: November 13, 2014
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Kentaro Kan, Naomichi Tamura, Kazuhisa Iwasaki
  • Publication number: 20140326008
    Abstract: The present invention relates to an air conditioner in which oils mixed in the refrigerant compressed by a plurality of compressors are separated together and recovered in an efficient manner. An air conditioner according to an embodiment of the present invention comprises: a plurality of compressors for compressing refrigerant; an oil separator connected to the plurality of compressors so as to separate oils mixed with the refrigerant compressed by the plurality of compressors; an oil discharge pipe connected to the oil separator so as to discharge the oils separated by the oil separator, and a plurality of oil recovery pipes branched from the oil discharge pipe so as to recover the oils separated by the oil separator to the plurality of compressors.
    Type: Application
    Filed: October 19, 2012
    Publication date: November 6, 2014
    Applicant: LG ELECTRONICS LTD.
    Inventors: Pil Hyun Yoon, Yong Cheol Sa
  • Patent number: 8826691
    Abstract: An air conditioner includes at least one compressor, an outlet pipe, an inlet pipe, and at least one bypass pipe. Oil and/or refrigerant discharged from the at least one compressor flows through the outlet pipe. The inlet pipe receives the oil and/or refrigerant flown through the outlet pipe and allows the oil and/or refrigerant to flow to the at least one compressor. The at least one bypass pipe is connected to the at least one compressor and allow bypass flows of the oil and/or refrigerant from the at least one compressor to the outlet pipe.
    Type: Grant
    Filed: January 30, 2008
    Date of Patent: September 9, 2014
    Assignee: LG Electronics Inc.
    Inventors: Pil Hyun Yoon, Sai Kee Oh
  • Patent number: 8820103
    Abstract: An air conditioner includes a plurality of compressors, an intake passageway, a bypass unit, and an expansion valve. The intake passageway distributes a fluid to each of the compressors. The bypass unit includes a plurality of bypass pipes connected respectively to the compressors and a common bypass pipe to discharge the fluids from the compressors to the intake passageway. The expansion valve is provided to the bypass unit to control a flow of fluid from the common bypass pipe to the intake unit.
    Type: Grant
    Filed: December 22, 2010
    Date of Patent: September 2, 2014
    Assignee: LG Electronics Inc.
    Inventors: Hojong Jeong, Sedong Chang, Baikyoung Chung, Jiyoung Jang
  • Publication number: 20140238069
    Abstract: An air conditioner outdoor unit includes: a compressor; a heat source-side heat exchanger connected to the compressor; an oil separator disposed between a refrigerant discharge opening of the compressor and the heat source-side heat exchanger configured to separate a refrigerant oil from a refrigerant discharged from the compressor; and a first three-way valve fitted to a refrigerant pipe between the oil separator and the heat source-side heat exchange.
    Type: Application
    Filed: February 20, 2014
    Publication date: August 28, 2014
    Applicant: Fujitsu General Limited
    Inventor: Kuniko Hayashi
  • Publication number: 20140238070
    Abstract: An installation for refrigerating a same application by means of a single refrigerator/liquefier or several refrigerators/liquefiers arranged in parallel, the refrigerator(s)/liquefier(s) using a working gas of the same type having a low molar mass, each refrigerator/liquefier comprising a compression station to compress the working gas, a cold box intended for cooling the working gas at the outlet of the compression station, the compression station comprising only compression machines of the lubricated screw type and systems for removing the oil from the working fluid at the outlet of the compression machines, and the compression station comprises a plurality of compression machines defining several levels of pressure for the working fluid, the compression station comprising at least two compression machines defining at least two levels of pressure increasing above the level of pressure of the fluid at the inlet of the compression station, two main compression machines being arranged in series and defining,
    Type: Application
    Filed: August 14, 2012
    Publication date: August 28, 2014
    Inventors: Jean-Marc Bernhardt, Cindy Deschildre, Eric Fauve, David Grillot
  • Publication number: 20140223954
    Abstract: Provided is an oil separator in which a filter member is arranged between inner and outer punching plates and that includes a filter element configured so that a refrigerant gas that has flowed in from an inlet pipe flows into the filter member through inner through-holes provided in the inner punching plate, and flows outside through outer through-holes provided in the outer punching plate, and a shell that houses the filter element therein and has a bottom portion that collects leak oil that has flowed out of the outer through-holes. An auxiliary flow channel plate for the leak oil is provided in the surface of the outer punching plate, and is configured so that the leak oil is discharged to the bottom portion of the shell through the auxiliary flow channel plate.
    Type: Application
    Filed: January 31, 2014
    Publication date: August 14, 2014
    Applicant: SUMITOMO HEAVY INDUSTRIES, LTD.
    Inventor: Takuya Shimada
  • Publication number: 20140216103
    Abstract: A system may include a compressor, a heat exchanger, an expansion device, a lubricant separator, and a flow path. The compressor includes a compression mechanism. The heat exchanger receives compressed working fluid from the compressor. The expansion device is disposed downstream of the heat exchanger. The lubricant separator receives lubricant and working fluid discharged from the compression mechanism and provides separated lubricant to the compression mechanism. The flow path may receive working fluid from the heat exchanger and may provide working fluid to the heat exchanger. The flow path may extend between a first location disposed between the heat exchanger and the expansion device and a second location disposed between the heat exchanger and the compressor. The working fluid from the flow path may absorb heat from the separated lubricant.
    Type: Application
    Filed: February 4, 2014
    Publication date: August 7, 2014
    Applicant: Emerson Climate Technologies, Inc.
    Inventors: Kirill M. IGNATIEV, Robert C. STOVER, Michael M. PEREVOZCHIKOV
  • Patent number: 8783059
    Abstract: A refrigerating air-conditioning apparatus, at least provided with no possibility that a foreign material returns to a compressor from an accumulator at a time of the pipeline-cleaning operation firstly, and provided with a possibility to perform a collecting operation for the foreign material in a short time secondary, is provided. The heat-source side unit includes an accumulator provided with a function to separate and collect the foreign material in an existing pipeline, a collecting container for collecting the foreign material separated by the accumulator, and an oil return pipeline for returning refrigerating machine oil to the compressor via a flow amount adjusting device, installed at a lower portion of the accumulator, and at a time of ordinary cooling or heating operation, the refrigerating machine oil is caused to flow into the oil return pipeline, and at a time of pipeline cleaning and foreign material-collecting operations, the flow amount adjusting device is fully closed.
    Type: Grant
    Filed: August 26, 2011
    Date of Patent: July 22, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventors: Masaki Toyoshima, Susumu Yoshimura, Shinichi Wakamoto, Osamu Morimoto
  • Patent number: 8769982
    Abstract: A refrigeration system can use a flash tank to separate vapor refrigerant from liquid refrigerant. The refrigeration system can include a liquid-refrigerant injection system that can inject liquid refrigerant into an intermediate-pressure location of the compressor. The injected liquid refrigerant can absorb the heat of compression during the compression process. The refrigeration system can include an economizer system that injects a refrigerant vapor into an intermediate-pressure location of the compressor in conjunction with the injection of the cooling liquid. The refrigeration system can incorporate a cooling-liquid injection system that can inject a cooling liquid into an intermediate-pressure location of the compressor.
    Type: Grant
    Filed: October 1, 2007
    Date of Patent: July 8, 2014
    Assignee: Emerson Climate Technologies, Inc.
    Inventors: Kirill Ignatiev, Jean-Luc M. Caillat
  • Publication number: 20140174112
    Abstract: A vaporizer has: an inlet (72); an oil outlet (90; 94); a vent (120); a hot gas inlet (132); and a cooled gas outlet (134). A gas flowpath (130) extends from the hot gas inlet to the cooled gas outlet. A vaporizer chamber (192) is downstream of the inlet along a primary flowpath. A gas conduit (220) is along the gas flowpath in heat exchange relation with the primary flowpath. A sump (194) is below the vaporizer chamber. A housing (180) encloses the sump and the vaporizer chamber. A passageway extends from the vaporizer chamber to the sump.
    Type: Application
    Filed: July 27, 2012
    Publication date: June 26, 2014
    Applicant: CARRIER CORPORATION
    Inventor: Anthony S. Molavi
  • Publication number: 20140165646
    Abstract: An oil separation device (14) for separating oil from a refrigerant-oil-mixture in a refrigeration cycle (1), the oil separation device (14) comprises a first refrigerant conduit having at least a first portion (16) with a first diameter (d1); a second refrigerant conduit arranged downstream of and connected to the first refrigerant conduit, the second refrigerant conduit having at least a second portion with a second diameter (d2) being smaller than the first diameter (d1); wherein the second portion (18) of the second refrigerant conduit having the second diameter (d2) extends into the first portion (16) of the first refrigerant conduit forming an oil separation pocket (32) between the outer diameter of the second portion (18) and the inner diameter of the first portion (16); and a suction line (20) having an inlet end (19), which opens into the oil separation pocket (32) and is configured to suck oil from the oil separation pocket (32).
    Type: Application
    Filed: July 19, 2011
    Publication date: June 19, 2014
    Inventors: Sascha Hellmann, Alexander Tambovtsev
  • Publication number: 20140130539
    Abstract: An oil separator and an air conditioner using the same are provided. The air conditioner may include at least one indoor unit connected to an outdoor unit by a refrigerant tube. The outdoor unit may include a compressor and an oil separator including a plurality of oil recovery tubes introducing oil into the compressor. The oil separator may include a housing, a suction tube guiding oil-mixed refrigerant into the housing, a discharge tube discharging refrigerant separated from the oil-mixed refrigerant, and first and second recovery tubes discharging oil separated from the oil-mixed refrigerant. At least one of the first or second recovery tubes may include an oil valve guiding a movement direction of the oil.
    Type: Application
    Filed: August 26, 2013
    Publication date: May 15, 2014
    Inventors: Pilhyun YOON, Yongcheol Sa
  • Publication number: 20140026609
    Abstract: The oil separator 11 separates oil in the refrigerant discharged from the compressor 4 and returns the oil back to the compressor 4. And includes a tank 21 into which refrigerant discharged from the compressor 4 flows, a float 24 whose inside is hollow formed by welding a plurality of members and made vertically movable according to the changes in the oil surface 20 inside the tank 21, and a needle valve 29 that returns oil inside the tank 21 to the compressor 4 according to the vertical movement of the float 24. The float 24 is provided such that the end point 24E of the welded portion comes above the oil surface 20.
    Type: Application
    Filed: July 25, 2013
    Publication date: January 30, 2014
    Applicant: PANASONIC CORPORATION
    Inventor: Rikio TADANO
  • Patent number: 8596088
    Abstract: An oil separator for an air conditioner, which includes: a case having a cylinder portion, and a lid portion and a bottom portion respectively closing an upper side opening end and a lower side opening end of the cylinder portion; an inlet pipe which is connectable to a discharging outlet of a compressor and which penetrates the lid portion so that an end of the inlet pipe is located inside the case; an outlet pipe which is connectable to a condenser and which penetrates the lid portion so that an end portion of the outlet pipe is located inside the case and protrudes into the cylinder portion toward the bottom portion; and a mesh portion which is provided to the end of the inlet pipe.
    Type: Grant
    Filed: March 22, 2010
    Date of Patent: December 3, 2013
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventor: Toshiyuki Sato
  • Patent number: 8590322
    Abstract: An oil separator includes a separation part and an oil storage part. The separation part includes a separation cylinder, an inner cylinder disposed in the separation cylinder and an inlet pipe connecting to the separation cylinder tangential to an inner surface of the separation cylinder. The separation part defines an inlet opening to introduce CO2 refrigerant containing oil in the separation cylinder. The separation cylinder separates the oil from the CO2 refrigerant by means of centrifugal force. A ratio of a flow rate (kg/h) of the CO2 refrigerant flowing in the separation cylinder to an area (mm2) of the inlet opening is at least 4. Alternative to or in addition to the above, a ratio of a distance (mm) from an end of the inner cylinder to a bottom wall of the separation cylinder to an inner diameter (mm) of the separation cylinder is at least 2.5.
    Type: Grant
    Filed: September 18, 2008
    Date of Patent: November 26, 2013
    Assignees: Denso Corporation, Nippon Soken, Inc.
    Inventors: Takashi Kusada, Yoichiro Kawamoto, Tadashi Hotta, Shigeki Iwanami
  • Publication number: 20130255308
    Abstract: A refrigerant circuit using a vapor compression cycle, the circuit usable for air conditioning, refrigeration or heat pump purposes. The circuit includes a lubricated compressor connected to an oil separator vessel separate from the compressor, a falling film or hybrid falling film evaporator and a condenser. The oil separator vessel extends substantially horizontally. The oil separator vessel is separated into a primary space and a secondary space by a filter pad configured to substantially remove entrained oil droplets of about 5 ?m and larger from the refrigerant entering the oil separator vessel. The primary space is in fluid connection with a discharge of the compressor. The secondary space is in fluid connection with an inlet of the condenser. The circuit has an oil entrainment flow discharge of lubricant from the compressor of at least about two percent by mass relative to refrigerant flow.
    Type: Application
    Filed: March 29, 2012
    Publication date: October 3, 2013
    Applicant: JOHNSON CONTROLS TECHNOLOGY COMPANY
    Inventor: Paul M. DE LARMINAT
  • Publication number: 20130247607
    Abstract: A refrigeration system that induces lubricant-liquid refrigerant mixture flow from a flooded or falling film evaporator by means of the lubricant-liquid refrigerant mixture flow adsorbing heat from an electronic component.
    Type: Application
    Filed: March 22, 2012
    Publication date: September 26, 2013
    Applicant: TRANE INTERNATIONAL INC.
    Inventors: Todd J. Love, Harry K. Ring, Jon P. Hartfield
  • Publication number: 20130186128
    Abstract: A chiller according to the present invention comprises: a compressor for compressing a refrigerant; an oil separator for separating oil and the refrigerant discharged from the compressor; a condenser for condensing the refrigerant passing through the oil separator; and expander for expanding the refrigerant condensed in the condenser; an evaporator for cooling cold water with the refrigerant expanded in the expander and connected to a demanding place via cold water pipes; an ejector for partially passing the refrigerant compressed in the compressor and connected to the evaporator via an evaporator oil recovery path; an oil recovery path of the oil separator connected in such as manner that the oil leaked out of the oil separator passes through the oil recovery path so as to be recovered to the compressor; and an ejector outlet path connected in such a manner than the oil and the refrigerant leaked out of the ejector passes through the ejector outlet path so as to be recovered to the compressor.
    Type: Application
    Filed: June 10, 2010
    Publication date: July 25, 2013
    Applicant: LG ELECTRONICS INC.
    Inventors: Byeong Su Kim, Jun Hyeon Hwang, Beom Chan Kim, Sang Hoon Yoo, Jung Wook Moon
  • Patent number: 8429930
    Abstract: An oil separator for use in separating oil from refrigerant gas in a chiller system is provided. Its operation is based on centrifugal separation principles and does not require the use any type of filter or media pack to remove oil from refrigerant gas. The oil separator includes a non-circular (e.g., elliptical) refrigerant outlet pipe that transitions the linear flow from the inlet connection to a swirling (e.g., circular) flow within the cylindrical housing. The non-circular shape of the entrance to the refrigerant outlet pipe provides for more turbulent gas flow and a greater extraction of oil as well as minimization of pressure losses.
    Type: Grant
    Filed: July 11, 2008
    Date of Patent: April 30, 2013
    Assignee: Johnson Controls Technology Company
    Inventors: Mahesh Valiya Naduvath, Jun Wang, Satheesh Kulankara
  • Patent number: 8424337
    Abstract: A refrigerant vapor compression system is provided that includes a refrigerant circuit and a lubricant cooler circuit. The lubricant cooler circuit is operatively associated with the compression device for cooling a lubricant associated with the compression device and includes a heat exchanger coil disposed downstream of the refrigerant heat absorption heat exchanger with respect to the flow of heating medium. The lubricant cooler heat exchanger defines a flow path for passing the lubricant in heat exchange relationship with the cooled heating medium leaving the refrigerant heat absorption heat exchanger.
    Type: Grant
    Filed: January 17, 2008
    Date of Patent: April 23, 2013
    Assignee: Carrier Corporation
    Inventors: Jason Scarcella, Kursten Lamendola
  • Publication number: 20130091891
    Abstract: A cascade refrigeration system including an upper portion having at least one modular chiller unit that provides cooling to at least one of a low temperature subsystem having a plurality of low temperature loads, and a medium temperature subsystem having a plurality of medium temperature loads. The modular chiller unit includes a refrigerant circuit having at least a compressor, a condenser, an expansion device, and an evaporator. An ammonia refrigerant which may have entrained oil from the compressor circulates within the refrigerant circuit. An oil recycling circuit removes some oil from the ammonia refrigerant for return to the compressor. An oil pot collects oil accumulated in the evaporator and an oil return line drains oil from the oil pot to an ammonia accumulator or directly to the compressor.
    Type: Application
    Filed: December 5, 2012
    Publication date: April 18, 2013
    Applicant: Hill Phoenix, Inc.
    Inventor: Hill Phoenix, Inc.
  • Patent number: 8402780
    Abstract: A heating/cooling system design enabling one to maintain a superheat level of more than 1 degree F. and up to 10 degrees F., incorporating a specially designed accumulator, optional special oil return means, a specially designed receiver, and, when utilized in a DX geothermal system application, a preferable sub-surface liquid refrigerant transport line insulation design, as well as a design enabling the utilization of at least two compressors to increase heat transfer temperature differentials together with special oil separators.
    Type: Grant
    Filed: May 4, 2009
    Date of Patent: March 26, 2013
    Assignee: Earth to Air Systems, LLC
    Inventor: B. Ryland Wiggs
  • Patent number: 8375740
    Abstract: An air conditioner includes a plurality of compressors, a plurality of oil separators, a plurality of oil collection pipes, a common inlet pipe, and a plurality of branch inlet pipes. The oil separators are connected to outlets of the compressors for separating a refrigerant and/or oil discharged from the compressors. The oil collection pipes are respectively connected to the oil separators for collecting oil separated by the oil separators. The common inlet pipe receives the collected oil and allows the oil to flow to the compressors. The branch inlet pipes branch off from the common inlet pipe and are respectively connected to the compressors.
    Type: Grant
    Filed: January 30, 2008
    Date of Patent: February 19, 2013
    Assignee: LG Electronics Inc.
    Inventors: Pil Hyun Yoon, Sai Kee Oh, Sung Oh Choi
  • Patent number: 8353180
    Abstract: An on-off valve (70) is provided in an oil feed path (43). When liquid refrigerant enters the oil feed pipe (43) from the oil separator (22), the temperature of the liquid refrigerant whose pressure has been reduced in the on-off valve (70) dramatically decreases. When the amount of such a decrease in temperature detected by a temperature sensor (73) exceeds a specified amount, it is determined that the liquid refrigerant enters the oil feed pipe (43), and the on-off valve (70) is closed.
    Type: Grant
    Filed: February 28, 2008
    Date of Patent: January 15, 2013
    Assignee: Daikin Industries, Ltd.
    Inventors: Masakazu Okamoto, Tetsuya Okamoto
  • Publication number: 20130008194
    Abstract: This description relates to a heat pump and a method of using the heat pump. The heat pump includes a hydraulic compressor that compresses a heat medium, an oil separation and recovery device that separates oil from the heat medium discharged from the compressor and returns the separated oil to the compressor, a condenser that liquefies the heat medium compressed in the compressor, a decompression device that decompresses the heat medium liquefied in the condenser, and an evaporator that causes the heat medium to absorb heat. The aforementioned devices are connected in series and the heat medium is circulated in those devices. The heat medium can be compressed at a compression ratio, at which a discharge temperature from the compressor becomes 150 to 200° C. An intake temperature control unit which can control the temperature of the heat medium taken into the compressor is on the intake side of the compressor.
    Type: Application
    Filed: July 9, 2012
    Publication date: January 10, 2013
    Applicant: MAYEKAWA MFG. CO., LTD.
    Inventors: Toshiro HATTORI, Yusuke ISHIZUKI
  • Publication number: 20120297818
    Abstract: A compressor includes a casing configured to store lubricating oil in a bottom part, and a compression mechanism accommodated in an interior of the casing. Lubricating oil is separated out from high-pressure refrigerant discharged from the compression mechanism. Lubricating oil separated out by the oil separator flows from a high-pressure space formed in the interior of the casing and into which the high-pressure refrigerant flows. An ejector mechanism is disposed in the interior of the casing, preferably in the high-pressure space. The ejector mechanism includes a refrigerant-accelerating flow path in which the high-pressure refrigerant flows via a narrowed part in order to increase a flow rate of the high-pressure refrigerant, and an oil suction flow path merging with the refrigerant-accelerating flow path.
    Type: Application
    Filed: January 27, 2011
    Publication date: November 29, 2012
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Toshiyuki Toyama, Takashi Uekawa
  • Publication number: 20120291464
    Abstract: Disclosed is an air conditioner in which a plurality of compressors retains a constant oil level. The air conditioner includes a plurality of compressors configured to compress a refrigerant, a plurality of oil separators connected respectively to the plurality of compressors and serving to separate oil contained in the refrigerant compressed in and discharged from the compressors, a plurality of oil return pipes configured to allow the oil separated in the plurality of oil separators to be returned into the plurality of compressors, a plurality of oil return valves installed respectively to the plurality of oil return pipes to open or close the plurality of oil return pipes respectively, and a resistor configured to connect the plurality of oil return pipes to each other.
    Type: Application
    Filed: May 16, 2012
    Publication date: November 22, 2012
    Applicant: LG ELECTRONICS INC.
    Inventors: Pilhyun Yoon, Yongcheol Sa
  • Patent number: 8312731
    Abstract: A refrigeration apparatus includes an outdoor unit having a first compressor and a second compressor connected in parallel with each other, a first oil separator attached to the first compressor and connected to a suction pipe of the second compressor via a first oil return piping including a pressure reducing device, and a second oil separator attached to the second compressor and connected to a suction pipe of the first compressor via a second oil return piping including a pressure reducing device. The suction pipes of the first and second compressors are connected together. The first compressor is a variable-speed compressor, and the second compressor is a constant-speed compressor. A solenoid valve selectively forming a bypass circuit with respect to the pressure reducing device, is connected in parallel with the pressure reducing device of the first oil return piping. The solenoid valve is opened when the first compressor is restarted.
    Type: Grant
    Filed: December 3, 2009
    Date of Patent: November 20, 2012
    Assignee: Fujitsu General Limited
    Inventors: Satoshi Tomioka, Hideya Tamura, Tetsuya Ito, Takahiro Matsunaga, Takamitsu Kurokawa, Shintaro Sanada