Lubricant Handling Patents (Class 62/84)
  • Patent number: 10578339
    Abstract: The purpose of the present invention is: to enable hot water at a required temperature to be supplied, even in cases when compressor load factor is low; to suppress heat dissipation from a waste-heat recovery device; and to improve waste-heat recovery rate. A waste-heat recovery system in an oil-cooled gas compressor is provided with: a compressor main body (3); an oil separator (6); gas piping (8) which supplies, to a demanded destination, compressed gas separated from oil by the oil separator; oil piping (7) which returns, to the compressor main body, the oil separated by the oil separator; and a waste-heat-recovery heat exchanger (10) which recovers heat from the compressed gas and/or the oil.
    Type: Grant
    Filed: July 11, 2018
    Date of Patent: March 3, 2020
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Kentaro Yamamoto, Masahiko Takano
  • Patent number: 10562407
    Abstract: A vehicle system includes a refrigerant loop with a specific arrangement of valves and evaporators or heat exchangers to reduce the number of valves necessary. The vehicle system includes a refrigerant loop that includes a first thermal expansion valve downstream of a condenser and upstream of a first evaporator. A second thermal expansion valve is downstream of the condenser and upstream of a second evaporator. A third thermal expansion valve is upstream of a battery chiller. This arrangement allows for the valves to be simplified such that none of the thermal expansion valve include a binary shut-off valve. A multi-flow position valve may be positioned at a location that combines the outlet of the first and second evaporators.
    Type: Grant
    Filed: December 8, 2017
    Date of Patent: February 18, 2020
    Assignee: FORD GLOBAL TECHNOLOGIES, LLC
    Inventors: Trent Greear Sutherland, Michael Steven Wallis
  • Patent number: 10386099
    Abstract: A working fluid for use in a compression refrigeration, air conditioning or heat pump system, is described, which has a refrigerant composed of a fluoro-olefin, and a lubricant which is a mixture of polyol ester and a polyoxyalkylene glycol, and the polyol ester is present in an amount of at least 50% by weight based on the total weight of the polyol ester and the polyoxyalkylene glycol. A lubricant, being a mixture of a polyol ester and a polyoxyalkylene glycol, is described and comprises at least 10% by weight of polyoxyalkylene glycol based on the total weight of the polyol ester and the polyoxyalkylene glycol.
    Type: Grant
    Filed: January 15, 2015
    Date of Patent: August 20, 2019
    Assignee: SHRIEVE CHEMICAL PRODUCTS, INC.
    Inventor: Elizabeth Dixon
  • Patent number: 10184683
    Abstract: A multi-type air conditioning device controls an evaporation temperature and a condensing temperature, depending on required capacity of an indoor unit. The air conditioning device compares a current evaporation temperature or condensing temperature with a reference value, of an evaporation temperature or an condensing temperature, corresponding to a lower limit flow rate, of a gaseous refrigerant, required for refrigerating machine oil not to accumulate in, but to flow through, the gas branch pipes, and calculates an amount of the refrigerating machine oil accumulated in a gas branch pipe which does not satisfy the lower limit flow rate. When the calculated amount exceeds a set amount, the air conditioning device performs oil collecting operation, and controls the oil collecting operation in view of a flow rate of a gaseous refrigerant in gas branch pipes.
    Type: Grant
    Filed: December 17, 2015
    Date of Patent: January 22, 2019
    Assignee: Daikin Industries, Ltd.
    Inventors: Ryuuta Ohura, Yuusuke Oka, Junya Minami
  • Patent number: 10138759
    Abstract: A closed loop performing a Rankine cycle for a motor vehicle includes a circulation and compression pump for a working fluid, a heat exchanger swept by a hot source for heating said working fluid, expansion means for expanding the hot fluid and a cooling exchanger-swept by a cooling fluid for cooling this working fluid. A method of controlling the closed loop performing a Rankine cycle for a motor vehicle includes, after detecting a vehicle accident situation, in communicating the inside of the loop with the ambient air.
    Type: Grant
    Filed: August 27, 2012
    Date of Patent: November 27, 2018
    Assignee: IFP ENERGIES NOUVELLES
    Inventor: Pierre Leduc
  • Patent number: 9920969
    Abstract: Provided is an oil level detection device to be mounted on a refrigerating and air-conditioning apparatus, the oil level detection device being configured to detect an oil level of oil accumulated inside a compressor forming the refrigerating and air-conditioning apparatus. The oil level detection device includes an oil level detection unit installed on an outer surface of the compressor and configured to detect a temperature of an installation position, a sensor output unit configured to output, to the refrigerating and air-conditioning apparatus, a signal for changing an operation state of the refrigerating and air-conditioning apparatus, and a determination unit configured to determine depletion of the oil accumulated inside the compressor based on measurement values obtained by the oil level detection unit at least after an output of the signal to be output from the sensor output unit.
    Type: Grant
    Filed: September 9, 2014
    Date of Patent: March 20, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yasutaka Ochiai, Fumitake Unezaki
  • Patent number: 9869496
    Abstract: A liquid chiller system utilizing a refrigerant capable of possessing a liquid state and a gas/vapor state, the refrigerant being cycled through a closed loop assembly of a compressor, an eccentric condenser and an eccentric evaporator. The eccentric compressor has a lower integrated reservoir and the eccentric evaporator has an upper dedicated reservoir such that separate, dedicated separator or receiver vessels are not required. The eccentric condenser is positioned above the eccentric evaporator such that liquid refrigerant flows by gravity from the eccentric condenser to the eccentric evaporator.
    Type: Grant
    Filed: August 27, 2015
    Date of Patent: January 16, 2018
    Assignee: STELLAR REFRIGERATION CONTRACTING, INC.
    Inventor: Luke T. Facemyer
  • Patent number: 9752582
    Abstract: Provided is a highly reliable oil free screw compressor including a first sensor for detecting a temperature of lubrication oil, second sensors for detecting temperatures of intake air, and a cooling fan controller having a storage portion storing therein a set temperature of lubrication oil and a set temperature of intake air, and a computing portion for computing a control signal for increasing the speed of the cooling fan if a detected value of a temperature of the lubrication oil, delivered from the first sensor, becomes higher than the set value of lubrication oil stored in the storage portion, and computing a control signal for increasing the speed of the cooling fan if a detected value of a temperature of the intake air, delivered from the second sensor, becomes higher than the set temperature of the intake air, stored in the storage portion.
    Type: Grant
    Filed: June 20, 2016
    Date of Patent: September 5, 2017
    Assignee: HITACHI INDUSTRIAL EQUIPMENT SYSTEMS CO., LTD.
    Inventors: Hideki Fujimoto, Hitoshi Nishimura
  • Patent number: 9644881
    Abstract: A container refrigeration device aims to improve dehumidification performance of the container refrigeration device. The container refrigeration device is configured to perform, in accordance with a dehumidification load, first dehumidification control under which air having passed through an evaporator is heated by exchanging heat with a refrigerant in a reheat heat exchanger, and blown into an inside of a container, and second dehumidification control under which a pressure of the refrigerant discharged from a compressor and flowing into the reheat heat exchanger is caused to be higher than a pressure of the refrigerant discharged from the compressor under the first dehumidification control, and a flow rate of the refrigerant discharged from the compressor is regulated such that a temperature inside the container is within a predetermined temperature range.
    Type: Grant
    Filed: July 23, 2013
    Date of Patent: May 9, 2017
    Assignee: Daikin Industries, Ltd.
    Inventors: Akitoshi Ueno, Yuusuke Fujimoto, Hideaki Kuriyama
  • Patent number: 9207004
    Abstract: Refrigerating machine oil is reliably returned to a compressor, regardless of whether the oil is miscible or immiscible with a refrigerant. A first refrigerant channel includes a compressor, a condenser, a first flow control valve, a refrigerant storing container, a second flow control valve, and a first evaporator are connected in that order. A refrigerant outlet of the first evaporator is connected to a suction refrigerant inlet of an ejector. A second refrigerant channel includes a compressor and a second evaporator connected in that order. A refrigerant inlet of the second evaporator is connected to a mixed refrigerant outlet of the ejector. A third refrigerant channel branching off from a halfway point of a pipe connecting a refrigerant outlet of the radiator and the first flow control valve includes a third flow control valve and a motive refrigerant inlet of the ejector are connected in that order.
    Type: Grant
    Filed: January 26, 2011
    Date of Patent: December 8, 2015
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Shinya Higashiiue, So Nomoto, Hirokazu Minamisako
  • Patent number: 9032754
    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: Grant
    Filed: July 2, 2012
    Date of Patent: May 19, 2015
    Assignee: TRANE INTERNATIONAL INC.
    Inventors: Todd J. Love, Michael Boehde, Benjamin E. Dingel
  • Patent number: 9032753
    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: Grant
    Filed: March 22, 2012
    Date of Patent: May 19, 2015
    Assignee: TRANE INTERNATIONAL INC.
    Inventors: Todd J. Love, Harry K. Ring, Jon P. Hartfield
  • Publication number: 20150114013
    Abstract: An air conditioner and a method for controlling and air conditioner are provided. The air conditioner may include at least one compressor, a main suction passage to guide a refrigerant into the at least one compressor, at least one oil separator connected to the at least one compressor, that separates oil from the refrigerant discharged from the at least one compressor, at least one oil level sensor disposed in the at least one compressor to detect whether the at least one compressor lacks oil, a return passage to collect the oil separated from the at least one oil separator into the at least one compressor, a distribution return passage branched from the at least one return passage and connected to the main suction passage, and a valve disposed in each of the at least one return passage and the distribution return passage.
    Type: Application
    Filed: October 27, 2014
    Publication date: April 30, 2015
    Inventors: Jinyoung JOO, Seokhoon JANG
  • Patent number: 8978400
    Abstract: This invention relates generally to oil lubricated helium compressor units for use in cryogenic refrigeration systems, operating on the Gifford McMahon (GM) cycle. The objective of this invention is to keep the oil separator and absorber, which are components in an oil lubricated, helium compressor, in an indoor air conditioned environment while rejecting at least 65% of the heat from the compressor outdoors during the summer. The balance of the heat is rejected to either the indoor air conditioned air, or cooling water. This is accomplished by circulating hot oil at high pressure to an outdoor air cooled heat exchanger and returning cooled oil to the compressor inlet, while hot high pressure helium is cooled in an air or water cooled heat exchanger in an indoor assembly that includes the compressor, an oil separator, an oil absorber, and other piping and control components. It is an option to reject the heat from the oil to the indoor space during the winter to save on the cost of heating the indoor space.
    Type: Grant
    Filed: July 8, 2010
    Date of Patent: March 17, 2015
    Assignee: Sumitomo (Shi) Cryogenics of America Inc.
    Inventors: Stephen Dunn, Ralph Longsworth
  • Publication number: 20150068229
    Abstract: A refrigerating cycle apparatus and a method of operating the same are provided. For a refrigerating cycle having a plurality of compressors connected in series for multi-stage compression, an inner space of each compressor and a pipe of the refrigerating cycle may be connected via an oil collection pipe, and oil may be discharged into the refrigerating cycle by pressure reversal during a pressure balancing operation, so as to allow the discharged oil to be collected into a high-stage compressor or a low-stage compressor. Accordingly, an amount of oil may be uniformly maintained in each of the plurality of compressors to prevent losses due to friction and/or increases in power consumption due to a lack of oil in one or more of the compressors. The structure of a device and pipes for performing oil balancing between the compressors may be simplified to enhance efficiency of the compressors.
    Type: Application
    Filed: October 1, 2014
    Publication date: March 12, 2015
    Inventors: Minkyu OH, Jangseok Lee, Myungjin Chung, Chanho Jeon, Sunam Chae, Juyeong Heo, Kwangwook Kim, Hoyoun Lee
  • Publication number: 20150068230
    Abstract: Cooling devices for use with electric submersible pump motors include a refrigerator attached to the end of the electric submersible pump motor with the evaporator heat exchanger accepting all or a portion of the heat load from the motor. The cooling device can be a self-contained bolt-on unit, so that minimal design changes to existing motors are required.
    Type: Application
    Filed: November 13, 2014
    Publication date: March 12, 2015
    Inventors: Todd A. Jankowski, Dallas D. Hill
  • Patent number: 8966915
    Abstract: An air-conditioning apparatus includes an outdoor air temperature sensor detecting an outdoor temperature; a compressor temperature sensor detecting a temperature of an outer wall of a compressor; a liquid-level and concentration detection sensor detecting a liquid surface level in the compressor and a concentration of a lubricant oil in a liquid in the compressor; an electric heater heating the compressor; and a controller that carries out preheating to the compressor by driving the electric heater when a detection value of the outdoor air temperature sensor is higher than or equal to a detection value of the compressor temperature sensor and, further, when the liquid surface level detected by the liquid-level and concentration detection sensor is higher than or equal to a predetermined level and the concentration of the lubricant oil in the liquid is lower than a preset minimum required concentration.
    Type: Grant
    Filed: February 8, 2012
    Date of Patent: March 3, 2015
    Assignee: Mitsubishi Electric Corporation
    Inventors: Katsuya Takeuchi, Hirokuni Shiba
  • 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: 8959944
    Abstract: The air conditioning system uses an air cycle thermodynamic process. The system comprises a centrifuge. This centrifuge includes at one of its ends, an axial inlet that funnels air into a centrifugal compressor rotating in unison with the centrifuge. The air is compressed, adiabatically heated and directed to a heat exchanger mounted in the rim of, and rotating with the centrifuge. The air is accelerated with respect the centrifuge by varying the centrifuge radius or by using forward leaning impeller blades. The air is cooled by the heat exchanger and directed to an expander also rotating with the centrifuge. The air is expanded and adiabatically further cooled. The cold air exits the centrifuge through an axial outlet located at the second end of the centrifuge.
    Type: Grant
    Filed: September 8, 2012
    Date of Patent: February 24, 2015
    Inventor: George Samuel Levy
  • Publication number: 20150040590
    Abstract: This disclosure relates to a method for operating a combined heat and power device, wherein carbon dioxide as a refrigerant (17) is compressed in a compressor, wherein the carbon dioxide is carried along a refrigerant circuit and routed back to the compressor via a collecting vessel (5). The method is distinguished by the fact that the compressor is lubricated with a lubricant (15) which has a density of more than 1004 g/l, and that a hot gas temperature in the compressor is held below a predetermined value, above which overheating and/or ageing of the lubricant occurs.
    Type: Application
    Filed: July 31, 2014
    Publication date: February 12, 2015
    Inventors: Jan Hinrichs, Tilo Schafer
  • Patent number: 8943854
    Abstract: Disclosed is a heat exchanger of a plate type comprising an evaporator having at least one inlet and at least one outlet allowing a first medium to enter into and exit from the evaporator. The evaporator comprises a plurality of interconnected evaporation chambers disposed in parallel, having at least one common inlet and at least one common outlet allowing the first medium to enter into and exit from the evaporation chambers.
    Type: Grant
    Filed: January 6, 2009
    Date of Patent: February 3, 2015
    Assignee: Danfoss Qinbao (Hangzhou) Plate Heat Exchanger Company Limited
    Inventor: Lars Persson
  • Publication number: 20150027146
    Abstract: A composition including 2,3,3,3-tetrafluoropropene and a lubricating oil including a polyalkylene glycol and a polyol ester, the polyol ester content in the lubricating oil being less than or equal to 25%. A method of lubricating a vapor compression circuit, the method including using a mixture including a polyalkylene glycol and a polyol ester as lubricating oil in the vapor compression circuit, in combination with a heat transfer fluid comprising 2,3,3,3-tetrafluoropropene, the content of polyol ester in the lubricating oil being less than or equal to 25%. Further, the use of said composition in methods for heating or cooling.
    Type: Application
    Filed: January 9, 2013
    Publication date: January 29, 2015
    Inventor: Béatrice Boussand
  • Publication number: 20140360210
    Abstract: A refrigeration chiller employs a centrifugal compressor the impellers of which are mounted on a shaft which is itself mounted for rotation using rolling element bearings lubricated only by the refrigerant which constitutes the working fluid of the chiller system. Apparatus is taught for providing liquid refrigerant to (1.) the bearings immediately upon chiller start-up, during chiller operation and during a coastdown period subsequent to shutdown of the chiller and (2.) the drive motor of the chiller's compressor for motor cooling purposes. By use of a variable speed-driven motor to drive the compressor, optimized part load chiller performance is achieved in a chiller which does not require or employ an oil-based lubrication system.
    Type: Application
    Filed: December 5, 2012
    Publication date: December 11, 2014
    Inventors: William E. Lapp, Todd W. Smith, Arthur L. Butterworth, Paul J. Sikorsky
  • 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
  • Patent number: 8899054
    Abstract: Cooling devices for use with electric submersible pump motors include a refrigerator attached to the end of the electric submersible pump motor with the evaporator heat exchanger accepting all or a portion of the heat load from the motor. The cooling device can be a self-contained bolt-on unit, so that minimal design changes to existing motors are required.
    Type: Grant
    Filed: October 18, 2012
    Date of Patent: December 2, 2014
    Assignee: Los Alamos National Security, LLC
    Inventors: Todd A. Jankowski, Dallas D. Hill
  • 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
  • Patent number: 8875525
    Abstract: An accumulator arrangement suitable for use in a cooling system designed for operation with a two-phase refrigerating medium, includes an accumulator vessel with a receptacle for receiving a refrigerating medium. A liquefier of the accumulator arrangement is adapted to liquefy refrigerating medium to be received into the receptacle of the accumulator vessel before fed in the receptacle of the accumulator vessel and includes a refrigerating medium outlet for discharging refrigerating medium which liquefied in the liquefier from the liquefier.
    Type: Grant
    Filed: March 23, 2012
    Date of Patent: November 4, 2014
    Assignee: Airbus Operations GmbH
    Inventor: Markus Piesker
  • Patent number: 8863533
    Abstract: A refrigerating cycle apparatus and a method of operating the same are provided. For a refrigerating cycle having a plurality of compressors connected in series for multi-stage compression, an inner space of each compressor and a pipe of the refrigerating cycle may be connected via an oil collection pipe, and oil may be discharged into the refrigerating cycle by pressure reversal during a pressure balancing operation, so as to allow the discharged oil to be collected into a high-stage compressor or a low-stage compressor. Accordingly, an amount of oil may be uniformly maintained in each of the plurality of compressors to prevent losses due to friction and/or increases in power consumption due to a lack of oil in one or more of the compressors. The structure of a device and pipes for performing oil balancing between the compressors may be simplified to enhance efficiency of the compressors.
    Type: Grant
    Filed: June 8, 2012
    Date of Patent: October 21, 2014
    Assignee: LG Electronics Inc.
    Inventors: Minkyu Oh, Jangseok Lee, Myungjin Chung, Chanho Jeon, Sunam Chae, Juyeong Heo, Kwangwook Kim, Hoyoun Lee
  • Publication number: 20140305146
    Abstract: Herein disclosed is a lubricant oil or lubricant for the compressor of a refrigeration system which operates with a refrigerant comprising at least one component of the hydrocarbon (HC) group of refrigerants, (a) whereby the lubricant consists of at least 85 weight % of alkylbenzene having an average molecular weight of ?160 g/mol and exhibiting a viscosity of 2.2-3.0 centistokes (cSt) at 40 deg C.; optionally wherein the alkylbenzene consists of at least 85 wt % of linear (straight chain) alkylbenzene, having an average molecular weight of ?160 g/mol and exhibiting a viscosity of 2.2-3.0 centistokes (cSt) at 40 deg C.; (b) or alternatively whereby the lubricant consists of at least 85 weight % of alkylbenzene having an average molecular weight of ?190 g/mol and having a viscosity of 2.5-3.5 cSt at 40 deg C.; optionally wherein the alkylbenzene consists of at least 85 wt % of linear (straight chain) alkylbenzene, having an average molecular weight of ?190 g/mol and exhibiting a viscosity of 2.5-3.
    Type: Application
    Filed: February 18, 2014
    Publication date: October 16, 2014
    Applicant: SHREIVE CHEMICAL PRODUCTS, Inc.
    Inventor: Elizabeth DIXON
  • Patent number: 8850835
    Abstract: A compressor (20) has a case (22) and a crankshaft (38). The case has a number of cylinders (30, 32). For each of the cylinders, the compressor includes a piston (34) mounted for reciprocal movement at least partially within the cylinder. A connecting rod (36) couples each piston to the crankshaft. An electric motor compartment (50) of the case has a stator (42) and a rotor (40). The rotor is mounted to the crankshaft. The case has a wall (56) between the motor compartment and a crankcase compartment/sump (52). The wall bears a feature (120, 132; 420; 460) for coalescing oil entrained in a refrigerant flow (522), which flow exits the gap (90) between the rotor and the stator to prevent the oil from entering the cylinders.
    Type: Grant
    Filed: December 13, 2010
    Date of Patent: October 7, 2014
    Assignee: Carrier Corporation
    Inventor: Paul J. Flanigan
  • Publication number: 20140264147
    Abstract: Heat transfer compositions, methods and use wherein the composition comprising: (a) from about 5 to about 20% by weight of HFC-32; (b) from about 70% to about 90% by weight of HFO-1234ze; and (c) from about 5% to less than about 20% by weight of HFC-152a and/or HFC-134a.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Inventors: SAMUEL F. YANA MOTTA, MARK W. SPATZ, CHRISTOPHER J. SEETON
  • Patent number: 8833102
    Abstract: A turbo compressor includes a case; a plurality of compression stages which is disposed rotatably with respect to the case via sliding parts; an oil tank in which lubricant oils to be supplied to the sliding parts are stored; an oil cooler for cooling the lubricant oils; a primary piping for communicating the oil tank with the oil cooler; and a secondary piping for communicating the oil cooler with the sliding parts, wherein an accommodation space in which the oil cooler is accommodated is formed in the case, and the primary piping and the secondary piping are disposed within the case.
    Type: Grant
    Filed: July 16, 2010
    Date of Patent: September 16, 2014
    Assignee: IHI Corporation
    Inventors: Minoru Tsukamoto, Kentarou Oda
  • Publication number: 20140245761
    Abstract: A PAG lubricant basefluid for use with a fluoroalkene refrigerant, the basefluid containing a PAG having the formula: RX(RaO)x(RbO)yRc, where R is selected from alkyl groups having from 1-10 carbon atoms, acyl groups having from 1-10 carbon atoms, aliphatic hydrocarbon groups having from 2-6 valencies, and substituents containing a heterocyclic ring in which the heteroatom(s) are oxygen; X is O or S; Ra is a C2 alkylene group; Rb is a C3 alkylene group; Rc is the same as R or is an H; x and y are each independently 0 or an integer ?100; and the sum of x+y is an integer in the range of from about 5-100. Refrigeration and lubricant compositions containing the PAG lubricant basefluid and a method of operating a motor-integrated compressor of a refrigeration or air conditioning system with substantially no electrical leakage current are also provided.
    Type: Application
    Filed: May 15, 2014
    Publication date: September 4, 2014
    Applicant: SHRIEVE CHEMICAL PRODUCTS, Inc.
    Inventors: Elizabeth DIXON, Phil Beckler
  • Publication number: 20140245760
    Abstract: The present invention relates to compositions and processes of using perfluoropolyether to maintain or improve the oil return, lubrication, cooling capacity, or energy efficiency of a refrigeration, air conditioning or heat transfer system.
    Type: Application
    Filed: May 14, 2014
    Publication date: September 4, 2014
    Applicant: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Thomas Joseph Leck, Thomas Frank Saturno, Gregory A. Bell
  • Patent number: 8822395
    Abstract: The present invention provides a refrigerating machine oil composition for use in a compressor for a refrigerator in which a sliding surface of at least a part of constitutional members of the compressor is coated with a lubrication film-forming composition containing a resin having a heat distortion temperature of 100° C. or higher as a binder, and a solid lubricant, wherein the refrigerating machine oil composition contains a base oil made of a polyoxyalkylene glycol having a kinematic viscosity of from 3 to 50 mm2/s as measured at 100° C., and a compound selected from the group consisting of amide compounds, amidated amino acid compounds and aliphatic amines having a specific structural formula which compound is contained in an amount of from 0.
    Type: Grant
    Filed: April 27, 2006
    Date of Patent: September 2, 2014
    Assignee: Idemitsu Kosan Co., Ltd.
    Inventors: Harutomo Ikeda, Takayuki Kato, Manabu Sugiura, Masami Ohno, Shuichi Yasuda, Takahiro Sugioka
  • 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: 20140230465
    Abstract: Provided is a method for selecting a lubricant and a refrigerant for use in a vapor-compression refrigeration device such that the combination of the lubricant and refrigerant produces a fluid system having a lubricant-rich phase and a refrigerant-rich phase, yet exhibits miscible-type properties.
    Type: Application
    Filed: April 25, 2014
    Publication date: August 21, 2014
    Applicant: HONEYWELL INTERNATIONAL INC.
    Inventors: RAYMOND H. THOMAS, CHRISTOPHER J. SEETON, DAVID P. WILSON, SAMUEL F. YANA MOTTA, MARK W. SPATZ
  • Patent number: 8806876
    Abstract: An air conditioner (10) composed of a refrigerating apparatus includes a controller (90). A heating control section (91) of the controller (90) feeds electric current in an open phase state to an electric motor (62) of a compressor (30) to heat the compressor (30) in operation stop of the air conditioner (10). The heating control section (91) monitors the detection value of an outdoor air temperature sensor (72) during the operation stop of the air conditioner (10) and keeps on stopping feeding the electric current to the electric motor (62) during the time when the detection value decreases.
    Type: Grant
    Filed: August 3, 2007
    Date of Patent: August 19, 2014
    Assignee: Daikin Industries, Ltd.
    Inventors: Junichi Shimoda, Hidehiko Kinoshita
  • Publication number: 20140216075
    Abstract: Disclosed are the use of fluorine substituted olefins, including tetra- and penta-fluoropropenes, in a variety of applications, including in methods of depositing catalyst on a solid support, methods of sterilizing articles, cleaning methods and compositions, methods of applying medicaments, fire extinguishing/suppression compositions and methods, flavor formulations, fragrance formulations and inflating agents.
    Type: Application
    Filed: April 4, 2014
    Publication date: August 7, 2014
    Applicant: HONEYWELL INTERNATIONAL INC.
    Inventors: Rajiv R. Singh, Hang T. Pham, Ian Shankland
  • Publication number: 20140202182
    Abstract: Disclosed are the use of fluorine substituted olefins, including tetra- and penta-fluoropropenes, in a variety of applications, including in methods of depositing catalyst on a solid support, methods of sterilizing articles, cleaning methods and compositions, methods of applying medicaments, fire extinguishing/suppression compositions and methods, flavor formulations, fragrance formulations and inflating agents.
    Type: Application
    Filed: March 26, 2014
    Publication date: July 24, 2014
    Applicant: HONEYWELL INTERNATIONAL INC.
    Inventors: Rajiv R. Singh, Hang T. Pham, Ian Shankland
  • 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: 20140165631
    Abstract: One variation may include a product including a mixture including CF3CF?CH2 and a lubricating oil or grease wherein the lubricating oil or grease that reduces eliminates the likelihood that the refrigerant will ignite.
    Type: Application
    Filed: December 14, 2012
    Publication date: June 19, 2014
    Applicant: GM Global Technology Operations LLC
    Inventors: Jeffrey Santrock, Todd J. Gordon, Jeffrey A. Bozeman, Bryan M. Styles
  • Patent number: 8739559
    Abstract: Provided is a method for selecting a lubricant and a refrigerant for use in a vapor-compression refrigeration device such that the combination of the lubricant and refrigerant produces a fluid system having a lubricant-rich phase and a refrigerant-rich phase, yet exhibits miscible-type properties.
    Type: Grant
    Filed: November 1, 2012
    Date of Patent: June 3, 2014
    Assignee: Honeywell International Inc.
    Inventors: Raymond H. Thomas, Christopher J. Seeton, David P. Wilson, Samuel F. Yana Motta, Mark W. Spatz
  • Patent number: 8734118
    Abstract: A set of piston compressors (2, 4, 6, 8) for use in a refrigeration system comprises a fluid connection (10) between the crank cases of the piston compressors (2, 4, 6, 8) for allowing oil compensation between said piston compressors (2, 4, 6, 8); and a control unit (12) which in operation monitors the running time of each piston compressor (2, 4, 6, 8) and, in case all piston compressors (2, 4, 6, 8) are running, subsequently interrupts the operation of a respective piston compressor (2, 4, 6, 8) for a predetermined period of time for oil compensation if its running time reaches a predetermined maximum running time.
    Type: Grant
    Filed: October 18, 2007
    Date of Patent: May 27, 2014
    Assignee: United Technologies Corporation
    Inventors: Bernd Heinbokel, Heinz Gassen, Kai Munker
  • Patent number: 8603354
    Abstract: Provided is a lubricating oil composition for a refrigerator which uses a base oil including as the main component at least one kind of oxygen-containing compounds selected from polyoxyalkylene glycols, polyvinyl ethers, copolymers of poly(oxy)alkylene glycols or monoethers thereof and polyvinyl ethers, polyol esters, and polycarbonates. The lubricating oil composition for a refrigerator is used for a refrigerator that uses, as a refrigerant, a fluorine-containing organic compound, which is a refrigerant applicable to current car air conditioner systems or the like and has a specific polar structure, and has favorable sealing property, a low coefficient of friction factor in a sliding part, and excellent stability as well as excellent compatibility with the refrigerant.
    Type: Grant
    Filed: December 9, 2011
    Date of Patent: December 10, 2013
    Assignee: Idemitsu Kosan Co., Ltd.
    Inventor: Masato Kaneko
  • 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
  • Publication number: 20130312438
    Abstract: The temperature of high-temperature water at the exit of a condenser is maintained to be within a setting range by control of, under an operation with all cylinders, capacity of a reciprocating compressor in the period between a maximum allowable load and a minimum load for lubrication, at which the flow of a lubrication oil pump is ensured, based on the revolution-speed control of a drive motor that drives the reciprocating compressor and by control of the capacity of the reciprocating compressor at the minimum load for lubrication or less based on the combination of the control of decreasing the number of operation cylinders and the revolution-speed control of the drive motor. In addition, a heating mechanism is provided on an inlet path of the reciprocating compressor to prevent the liquefied refrigeration flow of a refrigerant liquid to the reciprocating compressor during the operation or at the start.
    Type: Application
    Filed: May 3, 2013
    Publication date: November 28, 2013
    Applicant: MAYEKAWA MFG. CO., LTD.
    Inventor: MAYEKAWA MFG. CO., LTD.
  • Patent number: 8590324
    Abstract: An external heat exchanger is used to transfer heat from a compressor lubricant to an expanded working fluid, thereby cooling the lubricant. The heat exchanger may also be used to sub-cool condensed working fluid with the same flow of expanded working fluid. A horizontal scroll-type compressor includes an intermediate lubricant sump between a main bearing support and a scroll member. A counterweight on the crankshaft can travel through the lubricant in the intermediate sump to splash the lubricant around. A horizontal scroll-type compressor can include multiple machined surfaces that are utilized to precisely center and align components of the compressor.
    Type: Grant
    Filed: May 10, 2010
    Date of Patent: November 26, 2013
    Assignee: Emerson Climate Technologies, Inc.
    Inventors: Weihua Guo, Honghong Zhan, Shi Wang, Huaming Guo, Guibin Wang, Jin Zhang
  • Patent number: 8590323
    Abstract: A turbo compressor includes a motor, an impeller which is rotationally driven as the rotative power of the motor is transmitted to the impeller, a gear unit which transmits the rotative power of the motor to the impeller, and an oil tank to which lubricant supplied to the gear unit is at least recovered, wherein the oil tank is a portion of a closed space formed by at least one of a motor housing surrounding the motor and an impeller housing surrounding the impeller.
    Type: Grant
    Filed: February 6, 2009
    Date of Patent: November 26, 2013
    Assignee: IHI Corporation
    Inventors: Minoru Tsukamoto, Kentarou Oda
  • Patent number: 8590335
    Abstract: A refrigerant recovery unit is provided that can clear oil from an oil inject path in order to prepare the unit to switch over to a different kind of oil. The refrigerant recovery unit includes an oil inject circuit that receives an oil from the oil bottle into the refrigerant system. The refrigerant recovery circuit is coupled in fluid communication with the oil inject circuit. The refrigerant recovery circuit is operable to receive and transfer a fluid drawn through the oil inject circuit. A controller is operatively connected to the refrigerant recovery circuit and to the oil inject circuit so that as the fluid is drawn through the oil inject circuit a quantity of the oil in the oil inject circuit is removed.
    Type: Grant
    Filed: February 27, 2012
    Date of Patent: November 26, 2013
    Assignee: Bosch Automotive Service Solutions LLC
    Inventors: William Brown, Mark McMasters, Gary Murray