US2986894A - Purge recovery arrangement for refrigeration systems - Google Patents

Purge recovery arrangement for refrigeration systems Download PDF

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Publication number
US2986894A
US2986894A US712934A US71293458A US2986894A US 2986894 A US2986894 A US 2986894A US 712934 A US712934 A US 712934A US 71293458 A US71293458 A US 71293458A US 2986894 A US2986894 A US 2986894A
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United States
Prior art keywords
pressure
refrigerant
condenser
line
chamber
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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.)
Expired - Lifetime
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US712934A
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English (en)
Inventor
James W Endress
Terry M Townsend
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Carrier Corp
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Carrier Corp
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Application filed by Carrier Corp filed Critical Carrier Corp
Priority to US712934A priority Critical patent/US2986894A/en
Priority to GB30708/58A priority patent/GB899074A/en
Priority to CH6485058A priority patent/CH367193A/de
Application granted granted Critical
Publication of US2986894A publication Critical patent/US2986894A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • F25B43/04—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for withdrawing non-condensible gases
    • F25B43/043—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for withdrawing non-condensible gases for compression type systems

Definitions

  • This invention relates to purge-recovery arrangement for refrigeration systems, more particularly, to an arrangement for purging non-condensable gases from a centrifugal refrigeration system and recovering from these purged non-condensable gases any refrigeration admixed therewith.
  • a variety of systems have been evolved, designed to purge this foreign matter from a refrigeration system and to facilitate recovery of any refrigerant removed with said foreign matter.
  • some devices have employed an auxiliary compression refrigeration system for initiating flow of the non-condensable gases from the primary refrigeration system and for chilling and condensing these non-condensable gases.
  • the increased cost of manufacture and subsequent maintenance arising from the provision of an auxiliary purge refrigeration system is obvious.
  • Other systems for example, have employed steam and water ejectors which do not permit recovery of the refrigerant.
  • the present invention provides an arrangement which permits purging of a refrigeration system to remove noncondensable gases and foreign matter from the refrigeration system, and thereafter to separate any purged refrigerant from the foreign matter and permit return of the refrigerant to the refrigeration system thus assuring that loss of refrigerant due to the necessary purging operation is a minimum.
  • Another object of this invention is to provide a purgerecovery system of a simple nature, having a minimum number of components.
  • a novel purge-recovery arrangement including a separation chamber within which a mixture of refrigerant, water and non-condensable gases may be separated.
  • the mixture is admitted to the separation chamber from the condenser of the refrigeration system, for example, a centrifugal refrigeration system, the chamber pressure and temperature being maintained during operation lower than pressure and temperature in the condenser.
  • a cooling coil is placed within the chamber, liquid refrigerant from the condenser passing through the coil and being evaporated therein by its heat exchange relation with the gases and vapors passing over the exterior of the coil.
  • a novel valving arrangement is provided controlling the elimination of non-condensable gases from the chamber in response to variation in pressure differentials between the condenser, separation chamber and evaporator.
  • a primary feature of the invention relates to the provision of a purge-recovery arrangement for a refrigeration system which permits automatic flow of non-condensable gases carrying entrained refrigerant and water vapors from the condenser of the refrigeration system to be purged, to a separation chamber where the non-condensable gases are cooled to condense refrigerant and water vapors intermingled therewith and then the non-condensable gases are passed off to the atmosphere while the condensed water is passed off to a water line, and the liquid refrigerant is separated from the water and returned to the refrigeration system.
  • Another feature of the invention resides in the fact that the separation chamber is provided with cooling by employing the refrigerant from the condenser to the refrigeration system, permitting said refrigerant to pass through an expansion means to the separation chamber.
  • the figure represents a schematic view of the novel purge-recovery system shown as applied to a centrifugal refrigeration system.
  • Refrigeration system 10 comprises a compressor 11, a condenser 12 having condenser sump 13 leading to an economizer 14 which supplies liquid refrigerant to evaporator or cooler 15; liquid refrigerant is flash-cooled in the economizer, the flashed vapor being forwarded to the second stage of compression of compressor 11 through line 14', as shown in Jones Patent Number 2,277,647, granted March 24, 1942.
  • cooler 15 liquid refrigerant is placed in heat exchange relation with a medium to be cooled, refrigerant vapor so formed being forward through line 16 to the first stage of compression of compressor 11.
  • a purge line 18, having a restricting orifice 19, strainer 19 and line valve 19 is extended to separation chamber 20.
  • Separation chamber 20 is formed by a shell or casing 21.
  • a condensing coil 23 is placed, preferably, in the upper part of the casing adjacent the purge line inlet so that gases entering the casing are passed over the coil in heat exchange relation with refrigerant passing through. the coil thereby condensing any refrigerant or water vapor carried by the non-condensable gases to separate the refrigerant and water from the non-condensable gases.
  • a separation deck 22 is placed below coil 23 and re-
  • a refrigerant generally employed in centrifugal refrigeration systems is dichlorodifiuoromethane which is not miscible with"- ceives the liquid condensed by the coil.
  • the liquid refrigerant separates from the water and passes through passageway 20 to the sump in the bottom of casing 21.
  • a weir 26 regulates the volume of liquid, refrigerant passing to the sump and prevents passage of I water due. to difference in density and immiscibility of the. water.
  • a float valve 24 placed in the sump regulates pas-f Patented June 6, 1961 assesses;
  • An equalizer tube 25 is formed in deck 22 and is provided with one or more openings in order that pressure in the upper and lower portions of the casing are equalized during operation.
  • a sight glass 62 is placed adjacent sump 61 so that an operator may check the volume of water collected in sump 61.
  • Water line 30 controlled by valve 31 is connected to sump 61. As water collects in sump 61, valve 31 is operated by the operator permitting water to drain from the sump to waste.
  • Atmospheric line 27 leads from the separation chamber casing 21 and is provided with a normally closed solenoid relief valve 28 for the relief of non-condensable gases which collect in chamber 20. Control of valve 28 will. be explained hereafter.
  • Liquid refrigerant supply line40 is connected from the sump 13 of condenser 12 to the cooling coil 23 within separation chamber casing 21.
  • Suitable expansion means such as temperature controlled expansion valve 41 or back pressure valve (not shown) is provided in the liquid refrigerant supply line 40 to control supply of refrigerant to coil 23. It will be understood expansion means 41. operates to maintain a desired coil temperature to prevent collection of frost or ice thereon or in the. separation chamber.
  • a temperature responsive control 42 (here shown in the form of a bulb and capillary tube) is connected to valve 41 to regulate the action'thereof. If'desired, as shown, the bulb may be placed on the'refrigerant leaving line 50 of coil 23 which in effect constitutes the suction line. The refrigerant after passagethrough coil 23 is forwarded to the cooler through line 50.
  • Solenoid valve 28 is controlled by means of two differential pressure switches 55, 56 placed in series in an electrical circuit including valve 28.
  • Switch 55 is connected to the condenser 12 by line 70 and to chamber by line 71 so that it responds to the difference in pressure therein.
  • Switch 56 is connected to the condenser 12 by line'70 and to suction line 50 or cooler 15 by line 73 so that it responds to the difference in pressure between cooler pressure and condenser pressure.
  • Both switches 55, 56 are atfected by such pressure differentials to control opening and closing of valve 28.
  • the switches are in series with each other and the main starter holding coil of the refrigeration system so that the switches are enersure differential and to open at sixteen pounds per square inch pressure differential.
  • switches are shown diagrammatically. switches are the same except that switch 55 is normally closed and switch 56 is normally open. Each includes a first bellows 75, and a second bellows 76 connected by a rod 77. A lever 78 is attached to rod 77 and is pivoted"- at point 79. Thus as the pressure differential reflected by'bellows 75, 76 moves rod 77 lever 78 pivots about' point 79 to move switch arm 80 toward or from contacts 81 breaking or closing the'circuit.
  • the differential pres sure switches employed may be manufacture by Penn Controls, Inc., of Goshen, Indiana, the normally closed switch being sold commercially as type I-IKOGBAIOZ'. and the normally open switchbeing-sold commerciallyas type-HKO6BA104.
  • the primary function of the purge-recovery system is to remove non-'condensable gases and water" condenser.
  • the non-condensable gases collect in the top of the separation chamber and may be released to the atmosphere through atmospheric line 27.
  • the condensed vapors,.liquid refrigerant and water are collected belowcondensing coil 23 is separation deck 22.
  • the liquid refrigerant separates from the water, the heavier refrigerant settling to the bottom and. passing over weir 26 beneath the separation deck to the' refrigerant sump in the bottom of chamber 20. It willv be observed that float valve 24- will open when it isbuoyed up to a sufficient height by a depth of refrigerant suflicient to permit opening the discharge refrigeration.
  • the lighter water normally accumulates at the top of the separation deck, overflows weir 60, collectsin the water sump and is discharged through water line 30 by means of manual valve 31.
  • the novel purge recovery unit is provided with controls so as to permit automatic purging of the.
  • Condenser-separation chamber differential pressure switch 55, and condenser evaporator switch 56' are both energized at start-up of the refrigeration system 10, since switches 55 and 56 preferably are in series with the main starter holding coil.
  • switches 55 and 56 preferably are in series with the main starter holding coil.
  • switch 55 is closed, and switch 56 is open. So long as either of switches 55 or 56 is open, atmospheric valve 28 remains closed.
  • switch 56 closes, thus completing the circuit to the solenoid of valve 28. opening the same, and permitting discharge of non-condensable gases through. atmospheric line 27 from separation chamber 20 to the atmosphere.
  • the present "invention provides'a novel purge-recovery" system foruse in removing non-condensable gases from refrigeration'systems, and'returning to the refrigeration system refrigerant admixed with the purged non-con densable gases.
  • the arrangement functions by meansof" pressure diiferentials in the condenser of the refrigeration system andthe separator of the purge system. to accomplish' automatic purging, without necessitating the use of conventionally employed auxiliary refrigeration apparatus such as compressors, air cooled condensers and the like.
  • a purging arrangement to purge non-condensable gases fromthe system and to recover refrigerant mixed with the noncondensable gases, said arrangement comprising a casing forming a chamber, a line connecting the chamber with the condenser to permit flow of non-cendensable gases and entrained vapor to the chamber from the condenser, a heat exchanger placed in the path of flow of the gases, at second line connecting the heat exchanger with the condenser to supply liquid refrigerant to the heat exchanger from the condenser, means in said second line regulating supply of refrigerant to the heat exchanger, non-condensable gases carrying entrained vapor flowing over the heat exchanger in heat exchange relation with refrigerant therein to condense vapor carried thereby thus separating the same from the non-condensable gases, athird line connecting the outlet of the heat exchanger to the evaporator'of the refrigeration system to forward refrigerant from the heat exchanger to the
  • valve in said line is a solenoid valve
  • first member is a first pressure differential switch
  • second member is a pressure differential switch
  • the first and second members being placed in an electrical circuit with said valve
  • the first switch responding to predetermined variation in the difference in pressure between condenser pressure and chamber pressure
  • the second switch responding to a predetermined variation in the difference in pressure between condenser pressure and evaporator pressure
  • the first switch upon startup, the first switch is closed and the second switch is open, the second switch closing upon a predetermined variation in the diflerence in pressure between condenser pressure and evaporator pressure being attained to energize the valve to permit noncondensable gases to flow from the chamber
  • the first switch remaining closed until a predetermined variation in pressure difference between condenser pressure and chamber pressure is attained, then opening to de-energize the valve and remaining open until a further predetermined variation in pressure difference between condenser pressure and chamber pressure is attained, then again closing to energize the valve to permit non-con
  • a purging arrangement to purge non-condensable gases from the system and to recover refrigerant mixed with the noncondensable gases, said arrangement comprising a casing forming a chamber, a line connecting the chamber with the condenser to permit flow of non-cendensable gases and entrained water and refrigerant vapors to the chamber from the condenser, a heat exchanger placed in the path of flow of the gases, a second line connecting the heat exchanger with the condenser to supply liquid refrigerant to the heat exchanger from the condenser, means in said line regulating supply of refrigerant to the heat exchanger, non-condensable gases carrying entrained vapor flowing over the heat exchanger in heat exchange relation.withrefrigerant therein to condense refrigerant and water vapors carried thereby, thus separating the same from the non-condensable gases, means in the casing for separating liquid refrigerant from water, means to remove the
  • a purging arrangement to purge non-condensable gases from the system and to recover refrigerant mixed with the noncondensable gases, said arrangement comprising a casing forming a chamber, a line connecting the chamber with the condenser to permit flow of non-condensable gases and entrained water and refrigerant vapors to the chamber from the condenser, a heat exchanger placed in the path of flow of the gases, a second line connecting the heat exchanger with the condenser to supply liquid refrigerant to the heat exchanger from the condenser, means in said line regulating supply of refrigerant to the heat exchanger, non-condensable gases carrying entrained vapor flowing over the heat exchanger in heat exchange relation with refrigerant therein to condense refrigerant and water vapors carried thereby, thus separating the same from the non-condensable gases, means in the casing for separating liquid refrigerant from water, means to remove the water from
  • a method of purging a refrigeration system to remove non-condensable gases and water from the system and to recover refrigerant mixed with the non-condensable gases and water in which the steps consist in collecting the non-condensable gases in a first portion oftlie system; removing, the non condnsable gaseswzar ryin'g entrained refrigerant 'vapor'and' water vapor to-a' second *pm'tion'of the system, placing) IiquidTefrigerant" from the first portion of the-system'in heat exchangerelation with the non-condensable gasesand vapors in the" second portion of the system to condense the vapors, separating refrigerant condensate from water in the second portion of the system, supplyingthe refrigerant condensate to a third portion of the system to cm-' pensate for a heat load imposed onthe system, removing water from the second portion of the system, and in response to predetrernined variation in

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Sorption Type Refrigeration Machines (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
US712934A 1958-02-03 1958-02-03 Purge recovery arrangement for refrigeration systems Expired - Lifetime US2986894A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US712934A US2986894A (en) 1958-02-03 1958-02-03 Purge recovery arrangement for refrigeration systems
GB30708/58A GB899074A (en) 1958-02-03 1958-09-25 Refrigeration systems including a purge recovery arrangement
CH6485058A CH367193A (de) 1958-02-03 1958-10-09 Verfahren zur Ausscheidung nicht kondensierbarer Gase und Verunreinigungen aus einer Kälteanlage und zur Wiedergewinnung des mit diesen Gasen und Verunreinigungen vermischten Kältemittels zur weiteren Verwendung desselben in der Kälteanl age

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Application Number Priority Date Filing Date Title
US712934A US2986894A (en) 1958-02-03 1958-02-03 Purge recovery arrangement for refrigeration systems

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CH (1) CH367193A (de)
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Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3131546A (en) * 1962-03-28 1964-05-05 Carrier Corp Purge arrangements
US3131548A (en) * 1962-11-01 1964-05-05 Worthington Corp Refrigeration purge control
US3138005A (en) * 1962-03-28 1964-06-23 Carrier Corp Purge arrangements
US3145544A (en) * 1961-11-07 1964-08-25 American Radiator & Standard Refrigeration system impurity purge means
US3146602A (en) * 1961-12-05 1964-09-01 Electronic Specialty Co Process and apparatus for eliminating fixed gas from an absorption refrigeration system
US3187515A (en) * 1962-09-04 1965-06-08 Electronic Specialty Co Method and apparatus for control of temperature in absorption refrigeration systems
DE1234244B (de) * 1961-11-07 1967-02-16 American Radiator & Standard Reinigungsvorrichtung fuer eine Kuehlanlage
US3592017A (en) * 1969-10-02 1971-07-13 Carrier Corp Purging arrangement for refrigeration systems
US3935715A (en) * 1974-06-26 1976-02-03 Borg-Warner Corporation Vapor condenser for a refrigeration system
US4129997A (en) * 1977-08-12 1978-12-19 Kunkle Robert J Permanent refrigerant dehydrator
US4169356A (en) * 1978-02-27 1979-10-02 Lloyd Kingham Refrigeration purge system
US4531375A (en) * 1984-05-14 1985-07-30 Carrier Corporation Purge system monitor for a refrigeration system
US4768347A (en) * 1987-11-04 1988-09-06 Kent-Moore Corporation Refrigerant recovery and purification system
US4938031A (en) * 1987-11-04 1990-07-03 Kent-Moore Corporation Refrigerant recovery and purification system
US4942741A (en) * 1989-07-03 1990-07-24 Hancock John P Refrigerant recovery device
US4986082A (en) * 1988-12-22 1991-01-22 Sanden Corporation Refrigerant charging system in which a refrigerant is freshened and smoothly charged into a storage container
US5168721A (en) * 1991-03-28 1992-12-08 K-Whit Tools, Inc. Refrigerant recovery device
US5186017A (en) * 1990-09-10 1993-02-16 K-Whit Tools, Inc. Refrigerant recovery device
US5222369A (en) * 1991-12-31 1993-06-29 K-Whit Tools, Inc. Refrigerant recovery device with vacuum operated check valve
US5231841A (en) * 1991-12-19 1993-08-03 Mcclelland Ralph A Refrigerant charging system and control system therefor
US5311750A (en) * 1992-12-17 1994-05-17 Stark John P Oil collector unit
US5758506A (en) * 1996-07-03 1998-06-02 White Industries, Llc Method and apparatus for servicing automotive refrigeration systems
US20100076695A1 (en) * 2008-09-19 2010-03-25 Raytheon Company Sensing and Estimating In-Leakage Air in a Subambient Cooling System
WO2017148936A1 (de) * 2016-03-02 2017-09-08 Efficient Energy Gmbh Wärmepumpe mit einer gasfalle, verfahren zum betreiben einer wärmepumpe mit einer gasfalle und verfahren zum herstellen einer wärmepumpe mit einer gasfalle
WO2021120689A1 (zh) * 2019-12-18 2021-06-24 珠海格力电器股份有限公司 空调机组

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10697674B2 (en) 2018-07-10 2020-06-30 Johnson Controls Technology Company Bypass line for refrigerant

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1636512A (en) * 1923-11-28 1927-07-19 Hilger George Method of and means for removing foreign gas from condensers
US1884312A (en) * 1931-07-30 1932-10-25 Vilter Mfg Co Refrigerating apparatus
US2062697A (en) * 1933-07-31 1936-12-01 Frick Co Noncondensable gas separator
US2249622A (en) * 1938-04-22 1941-07-15 Schlumbohm Peter Refrigeration condenser control
US2321964A (en) * 1941-08-08 1943-06-15 York Ice Machinery Corp Purge system for refrigerative circuits
US2450707A (en) * 1945-06-06 1948-10-05 Worthington Pump & Mach Corp Purging system for refrigerating systems

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1636512A (en) * 1923-11-28 1927-07-19 Hilger George Method of and means for removing foreign gas from condensers
US1884312A (en) * 1931-07-30 1932-10-25 Vilter Mfg Co Refrigerating apparatus
US2062697A (en) * 1933-07-31 1936-12-01 Frick Co Noncondensable gas separator
US2249622A (en) * 1938-04-22 1941-07-15 Schlumbohm Peter Refrigeration condenser control
US2321964A (en) * 1941-08-08 1943-06-15 York Ice Machinery Corp Purge system for refrigerative circuits
US2450707A (en) * 1945-06-06 1948-10-05 Worthington Pump & Mach Corp Purging system for refrigerating systems

Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3145544A (en) * 1961-11-07 1964-08-25 American Radiator & Standard Refrigeration system impurity purge means
DE1234244B (de) * 1961-11-07 1967-02-16 American Radiator & Standard Reinigungsvorrichtung fuer eine Kuehlanlage
US3146602A (en) * 1961-12-05 1964-09-01 Electronic Specialty Co Process and apparatus for eliminating fixed gas from an absorption refrigeration system
US3131546A (en) * 1962-03-28 1964-05-05 Carrier Corp Purge arrangements
US3138005A (en) * 1962-03-28 1964-06-23 Carrier Corp Purge arrangements
US3187515A (en) * 1962-09-04 1965-06-08 Electronic Specialty Co Method and apparatus for control of temperature in absorption refrigeration systems
US3131548A (en) * 1962-11-01 1964-05-05 Worthington Corp Refrigeration purge control
US3592017A (en) * 1969-10-02 1971-07-13 Carrier Corp Purging arrangement for refrigeration systems
US3935715A (en) * 1974-06-26 1976-02-03 Borg-Warner Corporation Vapor condenser for a refrigeration system
US4129997A (en) * 1977-08-12 1978-12-19 Kunkle Robert J Permanent refrigerant dehydrator
US4169356A (en) * 1978-02-27 1979-10-02 Lloyd Kingham Refrigeration purge system
US4531375A (en) * 1984-05-14 1985-07-30 Carrier Corporation Purge system monitor for a refrigeration system
US4768347A (en) * 1987-11-04 1988-09-06 Kent-Moore Corporation Refrigerant recovery and purification system
US4809520A (en) * 1987-11-04 1989-03-07 Kent-Moore Corporation Refrigerant recovery and purification system
US4938031A (en) * 1987-11-04 1990-07-03 Kent-Moore Corporation Refrigerant recovery and purification system
US5038578A (en) * 1987-11-04 1991-08-13 Kent-Moore Corporation Refrigerant recovery and purification system
US4986082A (en) * 1988-12-22 1991-01-22 Sanden Corporation Refrigerant charging system in which a refrigerant is freshened and smoothly charged into a storage container
US4942741A (en) * 1989-07-03 1990-07-24 Hancock John P Refrigerant recovery device
US5186017A (en) * 1990-09-10 1993-02-16 K-Whit Tools, Inc. Refrigerant recovery device
US5168721A (en) * 1991-03-28 1992-12-08 K-Whit Tools, Inc. Refrigerant recovery device
US5335512A (en) * 1991-03-28 1994-08-09 K-Whit Tools, Inc. Refrigerant recovery device
US5317903A (en) * 1991-12-19 1994-06-07 K-Whit Tools, Inc. Refrigerant charging system controlled by charging pressure change rate
US5231841A (en) * 1991-12-19 1993-08-03 Mcclelland Ralph A Refrigerant charging system and control system therefor
US5222369A (en) * 1991-12-31 1993-06-29 K-Whit Tools, Inc. Refrigerant recovery device with vacuum operated check valve
US5311750A (en) * 1992-12-17 1994-05-17 Stark John P Oil collector unit
US5758506A (en) * 1996-07-03 1998-06-02 White Industries, Llc Method and apparatus for servicing automotive refrigeration systems
US20100076695A1 (en) * 2008-09-19 2010-03-25 Raytheon Company Sensing and Estimating In-Leakage Air in a Subambient Cooling System
US8055453B2 (en) * 2008-09-19 2011-11-08 Raytheon Company Sensing and estimating in-leakage air in a subambient cooling system
WO2017148936A1 (de) * 2016-03-02 2017-09-08 Efficient Energy Gmbh Wärmepumpe mit einer gasfalle, verfahren zum betreiben einer wärmepumpe mit einer gasfalle und verfahren zum herstellen einer wärmepumpe mit einer gasfalle
JP2019507311A (ja) * 2016-03-02 2019-03-14 エフィシエント・エネルギ・ゲーエムベーハー ガストラップを有するヒートポンプ、ガストラップの動作方法、およびガストラップを有するヒートポンプの製造方法
US10921031B2 (en) 2016-03-02 2021-02-16 Efficient Energy Gmbh Heat pump with a gas trap, method for operating with a gas trap, and method for producing a heat pump with a gas trap
WO2021120689A1 (zh) * 2019-12-18 2021-06-24 珠海格力电器股份有限公司 空调机组

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Publication number Publication date
GB899074A (en) 1962-06-20
CH367193A (de) 1963-02-15

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