US20070144206A1 - Pressure reducer module with oil separator - Google Patents

Pressure reducer module with oil separator Download PDF

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Publication number
US20070144206A1
US20070144206A1 US11/615,247 US61524706A US2007144206A1 US 20070144206 A1 US20070144206 A1 US 20070144206A1 US 61524706 A US61524706 A US 61524706A US 2007144206 A1 US2007144206 A1 US 2007144206A1
Authority
US
United States
Prior art keywords
passage
refrigerant
pressure reducer
oil separator
lubricant
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US11/615,247
Other languages
English (en)
Inventor
Masato Tsuboi
Kenichi Suzuki
Yuuichi Matsumoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sanden Corp
Original Assignee
Sanden Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sanden Corp filed Critical Sanden Corp
Assigned to SANDEN CORPORATION reassignment SANDEN CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MATSUMOTO, YUUICHI, SUZUKI, KENICHI, TSUBOI, MASATO
Publication of US20070144206A1 publication Critical patent/US20070144206A1/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
    • F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
    • F25B9/008—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant the refrigerant being carbon dioxide
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—Expansion valves
    • F25B41/33—Expansion valves with the valve member being actuated by the fluid pressure, e.g. by the pressure of the refrigerant
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • F25B43/02—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for separating lubricants from the refrigerant
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2309/00—Gas cycle refrigeration machines
    • F25B2309/06—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide
    • F25B2309/061—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide with cycle highest pressure above the supercritical pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2341/00—Details of ejectors not being used as compression device; Details of flow restrictors or expansion valves
    • F25B2341/06—Details of flow restrictors or expansion valves
    • F25B2341/068—Expansion valves combined with a sensor
    • F25B2341/0683—Expansion valves combined with a sensor the sensor is disposed in the suction line and influenced by the temperature or the pressure of the suction gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/02—Centrifugal separation of gas, liquid or oil
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2500/00—Problems to be solved
    • F25B2500/18—Optimization, e.g. high integration of refrigeration components
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B40/00—Subcoolers, desuperheaters or superheaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • F25B43/006—Accumulators

Definitions

  • the present invention relates generally to a pressure reducer module with oil separator configured to be used in a vapor compression refrigerating system.
  • a refrigerant sequentially is compressed by a compressor, cooled and reduced in pressure by a radiator, and evaporated by an evaporator to obtain a refrigerant with refrigerating ability.
  • a natural-system refrigerant such as carbon dioxide
  • the efficiency of the refrigerating system decreases substantially.
  • the amount of lubricant included in the refrigerant circulated in the refrigerating system is reduced to prevent the reduction of the coefficient of heat transfer at the evaporator. Specifically, reducing the amount of lubricant which flows into the evaporator accelerates the heat transfer of the evaporator, which increases the efficiency of the refrigerating system.
  • FIG. 6 depicts a known refrigerating system 101 .
  • Refrigerating system 101 comprises a compressor 102 , a radiator 103 for cooling refrigerant which flows from compressor 102 , an inside heat exchanger 105 for exchanging heat between a high-temperature refrigerant which flows from radiator 103 and a low-temperature refrigerant which flows from an accumulator 104 .
  • Inside heat exchanger 105 functions as a gas/liquid separator and supplies the refrigerant to compressor 102 after the exchange of heat between the high-temperature refrigerant and the low-temperature refrigerant.
  • Refrigerating system 101 also comprises a pressure reducer 106 for reducing the pressure of refrigerant which flows from heat exchanger 105 , an evaporator 107 for evaporating refrigerant which flows from pressure reducer 106 , and accumulator 104 for storing gas/liquid two phase refrigerant from evaporator 107 and for supplying gas-phase refrigerant to the inside of heat exchanger 105 .
  • a technical advantage of the present invention is that a pressure reducer module may comprise an oil separator and may be configured to transmit a refrigerant to an evaporator while allowing a lubricant to bypass the evaporator, which substantially reduces the amount of lubricant flowing into the evaporator, which increases the efficiency of the refrigerating system by increasing the coefficient of heat transfer of the evaporator.
  • Another technical advantage of the present invention may be obtained by providing a pressure reducer module with oil separator which may reduce the number of coupling portions and reduce the weight and the cost of the system when the system.
  • a pressure reducer module comprises an oil separator configured to receive a lubricant and a refrigerant and to separate the lubricant from the refrigerant.
  • the pressure reducer module also comprises a pressure reducer connected to and formed integral with the oil separator. The pressure reducer is configured to receive the refrigerant from the oil separator and to reduce a pressure of the refrigerant.
  • FIG. 1 is a circuit diagram of a vapor compression refrigerating system having a pressure reducer module with oil separator, according to an embodiment of the present invention.
  • FIG. 2 is a vertical, sectional view of a pressure reducer module with oil separator, according to an embodiment of the present invention.
  • FIG. 3 is a cross-sectional view of the pressure reducer module with oil separator of FIG. 2 , as viewed along line A-A.
  • FIG. 4 is a Mollier chart of the vapor compression refrigerating system of FIG. 1 .
  • FIG. 5 is a vertical, sectional view of a pressure reducer module with oil separator, according to another embodiment of the present invention.
  • FIG. 6 is a circuit diagram of a known vapor compression refrigerating system.
  • FIGS. 1-5 like numerals being used for like corresponding parts in the various drawings.
  • FIG. 1 depicts a vapor compression refrigerating system having a pressure reducer module with oil separator, according to an embodiment of the present invention.
  • the refrigerating system 1 may use a natural-system refrigerant, such as carbon dioxide.
  • the refrigerating system 1 may comprise a compressor 2 , a radiator 3 connected to compressor 2 , an inside heat exchanger 7 connected to radiator 3 and to compressor 2 , and a pressure reducer module with oil separator 4 connected to inside heat exchanger 7 .
  • the refrigerating system also may comprise an evaporator 5 connected to pressure reducer module with oil separator 4 , and a gas/liquid separator 6 connected to the evaporator 5 and to inside heat exchanger 7 .
  • the connections between the various components may be made via a tube 1 .
  • compressor 2 may compress the refrigerant
  • radiator 3 may radiate the refrigerant and reduce a temperature of the refrigerant received from compressor 2
  • evaporator 5 may a evaporate the refrigerant received from pressure reducer module with oil separator 4
  • gas/liquid separator 6 may separate a gas portion of the refrigerant from a liquid portion of the refrigerant received from evaporator 5
  • inside heat exchanger 7 may exchange heat between the refrigerant sent from radiator 3 and the refrigerant sent from gas/liquid separator 6
  • FIGS. 2 and 3 depict an exemplary pressure reducer module with oil separator 4 , according to an embodiment of the present invention.
  • refrigerant and a lubricant e.g., oil
  • refrigerant and a lubricant flow from heat exchanger 7 into pressure reducer module with oil separator 4 via a high pressure side refrigerant inlet 8 , and only refrigerant flows to evaporator 5 via a high pressure side refrigerant outlet 9 .
  • Refrigerant also flows from evaporator 5 into pressure reducer module with oil separator 4 via a low pressure side refrigerant inlet 10 , and refrigerant and lubricant separated on the high pressure side flows out of pressure reducer module with oil separator 4 via a low pressure side refrigerant outlet 11 .
  • a high pressure side refrigerant passage 19 and a low pressure side refrigerant passage 20 are formed in a module body 18 , e.g., a block, and pressure reducer module with oil
  • the refrigerant and lubricant separate from each other by centrifugal separation. Specifically, the lubricant is gathered at the side of the inner wall surface, flows down along the inner wall surface by gravity, and is stored at a portion adjacent to the bottom surface.
  • the liquid refrigerant passes through the interior of a pipe provided in oil separator 12 , flows out from the oil separator, has its pressure reduced by a pressure reducer 13 and is turned into a two-phase condition, and it flows out from high pressure side refrigerant outlet 9 .
  • pressure reducer 13 may be a variable pressure reducer, and may adjust a degree of pressure reduction by pressure reducing movable part 16 and spring 17 . Moreover, the separation of lubricant is carried out at point A in the Mollier chart depicted in FIG. 4 or in the vicinity thereof
  • the lubricant that is stored adjacent to the bottom surface of oil separator 12 flows from a high pressure side refrigerant passage 19 to a low pressure side refrigerant passage 20 through a lubricant passage 14 by a pressure difference between passages 19 and 20 , and then flows with the low pressure side refrigerant from low pressure side refrigerant outlet 11 . Therefore, the separated lubricant is substantially sent to gas/liquid separator 6 and to compressor 2 bypassing evaporator 5 , as depicted in FIG. 1 .
  • lubricant passage 14 may have a small hole shape, such that high pressure side refrigerant does not easily flow out to low pressure side refrigerant passage 20 , and such that only lubricant is easily flowed out from high pressure side refrigerant passage 19 to low pressure side refrigerant passage 20 .
  • low pressure side refrigerant passage 20 is inclined from inlet 10 toward outlet 11 to prevent the reverse flow of lubricant which flows from lubricant passage 14 from the low pressure side refrigerant entrance 10 to evaporator 5 .
  • FIG. 5 depicts another example of a pressure reducer module with oil separator.
  • a pressure reducer is disposed before an oil separator.
  • refrigerant and a lubricant flow into pressure reducer module with oil separator 4 from high pressure side refrigerant inlet 8 , and after being reduced in pressure at pressure reducer 13 , flows into oil separator 12 which separates the refrigerant from the lubricant.
  • the refrigerant then flows through a pipe in oil separator 12 from the oil separator outlet to high pressure side refrigerant outlet 9 , and the lubricant is stored adjacent to the bottom surface in oil separator 12 , flows down from high pressure side refrigerant passage 19 to low pressure side refrigerant passage 20 through lubricant passage 14 , and flows from low pressure side refrigerant outlet 11 with the low pressure side refrigerant.
  • the separation of lubricant is carried out at point B in the Mollier chart depicted in FIG. 4 or the vicinity thereof.
  • pressure reducer 13 may comprise a mechanism for determining a degree of pressure reduction based on information concerning a condition of the refrigerating system.
  • the condition of the refrigerating system may be a pressure difference of refrigerant between the inlet and the outlet of the pressure reducer.
  • Pressure reducer 13 depicted in FIG. 2 comprises such a mechanism, in which pressure reducing movable part 16 moves by a balance between the inlet refrigerant pressure of pressure reducer 13 and the urging force of spring 17 , thereby changing the cross-sectional area of refrigerant passage and adjusting the degree of pressure reduction.
  • the mechanism for adjusting the degree of pressure reduction of the pressure reducer may be a mechanism for determining the degree of pressure reduction univocally from refrigerant pressure, refrigerant temperature, etc. of the refrigerating system. Further, the mechanism may be a mechanism formed by attaching a solenoid valve to a pressure reducing degree adjusting mechanism for determining a degree of pressure reduction based on information concerning refrigerant pressure, refrigerant temperature, air temperature at the exit of the evaporator, etc.
  • the portion of the main body of pressure reducer module with oil separator 4 may be formed, such that the high pressure side refrigerant inlet and the high pressure side refrigerant outlet for forming the high pressure side refrigerant passage, and the low pressure side refrigerant inlet and the low pressure side refrigerant outlet for forming the low pressure side refrigerant passage, are disposed on a single structural body, and by this structure, the connection of pipes 1 may be facilitated.
  • the pressure reducer module with oil separator according to the present invention may be used in a vapor compression refrigerating system for compressing and expanding refrigerant, and particularly, may be used a vapor compression refrigerating system using carbon dioxide as a refrigerant, such as a refrigerating system used in an air conditioning system for a vehicle.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Analytical Chemistry (AREA)
  • Power Engineering (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Compressor (AREA)
US11/615,247 2005-12-26 2006-12-22 Pressure reducer module with oil separator Abandoned US20070144206A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2005372735A JP4694365B2 (ja) 2005-12-26 2005-12-26 オイルセパレータ付き減圧器モジュール
JP2005-372735 2005-12-26

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EP (1) EP1801521A3 (ja)
JP (1) JP4694365B2 (ja)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090071188A1 (en) * 2007-09-19 2009-03-19 Denso Corporation Oil separator and refrigerant compressor having the same
US20090272128A1 (en) * 2008-05-02 2009-11-05 Kysor Industrial Corporation Cascade cooling system with intercycle cooling
CN109373645A (zh) * 2018-10-31 2019-02-22 上海爱斯达克汽车空调系统有限公司 带有节流多口膨胀阀的补气增焓热泵系统、交通工具、方法
US10935027B2 (en) * 2016-04-19 2021-03-02 OET GmbH Separator device for separating a fluid, in particular a lubricant, from a coolant

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5083106B2 (ja) * 2008-08-05 2012-11-28 株式会社デンソー 膨張弁及びそれを備えた蒸気圧縮式冷凍サイクル
KR102548358B1 (ko) * 2020-09-07 2023-06-28 한온시스템 주식회사 베이퍼 인젝션 모듈 및 이를 이용하는 히트펌프 시스템

Citations (3)

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US5706666A (en) * 1994-04-12 1998-01-13 Nippondenso Co., Ltd. Refrigeration apparatus
US6044655A (en) * 1996-08-22 2000-04-04 Denso Corporation Vapor compression type refrigerating system
US20040089018A1 (en) * 2001-02-21 2004-05-13 Noriho Okaza Refrigeration cycle device

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US4341086A (en) * 1980-10-06 1982-07-27 Clarion Co., Ltd. Refrigeration system
JPH03122473A (ja) * 1989-10-05 1991-05-24 Toyota Autom Loom Works Ltd 冷凍装置用蒸発圧力調整弁
JPH0571670A (ja) * 1991-09-12 1993-03-23 Nippondenso Co Ltd 膨張弁
JP3528433B2 (ja) * 1996-06-18 2004-05-17 株式会社日本自動車部品総合研究所 蒸気圧縮式冷凍サイクル
JPH11193967A (ja) * 1997-12-26 1999-07-21 Zexel:Kk 冷凍サイクル
JP3430160B2 (ja) * 2001-05-11 2003-07-28 松下冷機株式会社 冷蔵庫
JP2003240366A (ja) * 2002-02-21 2003-08-27 Mitsubishi Electric Corp 冷凍空調装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5706666A (en) * 1994-04-12 1998-01-13 Nippondenso Co., Ltd. Refrigeration apparatus
US6044655A (en) * 1996-08-22 2000-04-04 Denso Corporation Vapor compression type refrigerating system
US20040089018A1 (en) * 2001-02-21 2004-05-13 Noriho Okaza Refrigeration cycle device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090071188A1 (en) * 2007-09-19 2009-03-19 Denso Corporation Oil separator and refrigerant compressor having the same
US8590322B2 (en) 2007-09-19 2013-11-26 Denso Corporation Oil separator and refrigerant compressor having the same
US20090272128A1 (en) * 2008-05-02 2009-11-05 Kysor Industrial Corporation Cascade cooling system with intercycle cooling
US9989280B2 (en) 2008-05-02 2018-06-05 Heatcraft Refrigeration Products Llc Cascade cooling system with intercycle cooling or additional vapor condensation cycle
US10935027B2 (en) * 2016-04-19 2021-03-02 OET GmbH Separator device for separating a fluid, in particular a lubricant, from a coolant
CN109373645A (zh) * 2018-10-31 2019-02-22 上海爱斯达克汽车空调系统有限公司 带有节流多口膨胀阀的补气增焓热泵系统、交通工具、方法

Also Published As

Publication number Publication date
JP4694365B2 (ja) 2011-06-08
EP1801521A3 (en) 2008-02-13
JP2007170783A (ja) 2007-07-05
EP1801521A2 (en) 2007-06-27

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AS Assignment

Owner name: SANDEN CORPORATION, JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:TSUBOI, MASATO;SUZUKI, KENICHI;MATSUMOTO, YUUICHI;REEL/FRAME:019208/0397

Effective date: 20070330

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION