WO1989007227A1 - A method and arrangement for pumping preferably refrigerants - Google Patents

A method and arrangement for pumping preferably refrigerants Download PDF

Info

Publication number
WO1989007227A1
WO1989007227A1 PCT/SE1989/000029 SE8900029W WO8907227A1 WO 1989007227 A1 WO1989007227 A1 WO 1989007227A1 SE 8900029 W SE8900029 W SE 8900029W WO 8907227 A1 WO8907227 A1 WO 8907227A1
Authority
WO
WIPO (PCT)
Prior art keywords
refrigerant
heat exchanger
compressor
pressure
container
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.)
Ceased
Application number
PCT/SE1989/000029
Other languages
French (fr)
Inventor
Jan-Olav Leander ÅHMAN
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.)
Individual
Original Assignee
Individual
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=20371210&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO1989007227(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Individual filed Critical Individual
Priority to AU30360/89A priority Critical patent/AU624358B2/en
Priority to BR898907215A priority patent/BR8907215A/en
Priority to AT89902096T priority patent/ATE87358T1/en
Priority to KR1019890701784A priority patent/KR930005667B1/en
Publication of WO1989007227A1 publication Critical patent/WO1989007227A1/en
Priority to NO903278A priority patent/NO170652C/en
Priority to DK176790A priority patent/DK169528B1/en
Priority to FI903768A priority patent/FI91560C/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • F25B45/00—Arrangements for charging or discharging 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
    • F25B2345/00—Details for charging or discharging refrigerants; Service stations therefor
    • F25B2345/002—Collecting refrigerant from a cycle

Definitions

  • the present invention relates to a method and to an arrangement which will enable the use of a piston com- pressor pump in pumping preferably refrigerants of low boiling points, either in a liquid or a gaseous state, for instance freons, from a first refrigerant circuit or container to a second refrigerant circuit or container.
  • freon suction devices or freon-exhauster ⁇ , based on the use of piston compressors of the kind which are mass produced in large numbers, and therewith at rela ⁇ tively small costs, for use in conjunction with compressor driven refrigerators and freezers.
  • freon suction devices are only suitable for extracting freon in gas form, since liquid freon cannot be compressed and consequently the compressor will be seriously damaged if liquid freon should enter a working piston compressor.
  • One object of the invention is to provide a method and apparatus which will enable a refrigerating system to be emptied quickly and safely from both the gas and the liquid side thereof. Another object is to provide less costly, readily handled and readily transported freon suction devices, by enabling such devices to be con- structed with the aid of known, mass produced components.
  • Figure 1 illustrates schematically an inventive method of pumping refrigerant from a refrigerating system to a container with the aid of a piston compressor pump
  • Figure 2 is a side view which illustrates schematically alternative positioning of the main components of an inventive arrangement.
  • FIG. 1 illustrates schematically the inventive method of pumping refrigerant, e.g. freon, from a refrigerating . plant or system 9, only part of which is shown, to a container 8, and the reference numeral 1 in said Figure identifies a broken line surrounding a pump arrangement which includes those components necessary for carrying out the method.
  • these components also include a heat exchanger 4 which is provided with two chambers or pipe systems, and a pressure reduction valve 5.
  • One chamber of the heat exchanger 4 is connected in the pipe or line through which refrigerant is delivered to the compressor 2, i.e.
  • the suction line 6, at a location close to the compressor, and the pressure reduction valve 5 is connected to the line 6 at a location upstream of the com ⁇ pressor as seen in the direction of refrigerant flow to the compressor.
  • the pipe or line extending from the com- pressor 2, i.e. the pressure line 7, first passes through an oil separator 3, in which any oil present in the refri ⁇ gerant and picked up from the compressor is separated from the refrigerant and returned to the compressor.
  • the refri ⁇ gerant is then passed to the other chamber of the heat exchanger 4, before it can be connected to a collecting container or cylinder 8.
  • the refrigerating plant 9 includes a cooling compressor 12 which has a respective closure valve 10, 11 mounted on the suction and pressure side thereof.
  • the refrigerating system can be divided into a gas side and a liquid side, with the compressor 12 and a system expansion valve (not shown) being arranged in the zones between said sides.
  • the gas side is referenced A and the liquid side B and a broken line through the compressor 12 marks an imaginary boundary between these sides.
  • the suction line 6 of the pump arrangement 1 is connected to both the gas side A and the liquid side B of the refri ⁇ gerating plant 9 by means of two branch lines 13 and 14.
  • the refrigerating system can therewith be emptied of refrigerant either from solely the gas side A or solely the liquid side B or from both side A and side B simultan ⁇ eously, by adjusting the settings of valves 10 and 11 accordingly.
  • the refrigerant will arrive at the reduction valve 5 preferably under pressure and in a liquid state and a greater part of the refrigerant will be converted to gas form in the pressure reduction valve.
  • the refrigerant then passes through one of the chambers of the heat exchanger 4, which operates in accordance with the counterflow prin ⁇ ciple and in which any liquid refrigerant in the refriger- ant flow will be progressively heated and therewith gasified.
  • the refrigerant entering the compressor 2 is thus in a gaseous state and is compressed in the com ⁇ pressor and then passed to the oil separator 3, in which any oil present in the refrigerant is removed therefrom, whereafter the refrigerant is passed under pressure to the other chamber of the heat exchanger 4, where it is pro ⁇ gressively cooled to a liquid state such as to enable it to be fed into the container or cylinder 8.
  • the refrigerant cooled by pressure reduction in the suction line 6 will be heated in the heat exchanger 4 by the refrigerant heated by compression in the pressure line at the same time as the refrigerant in the pressure line 7 is cooled by the medium in the suction line 6.
  • FIG. 2 is a side view which illustrates schematically an alternative positioning of the main components of an in ⁇ ventive pump arrangement enclosed in a casing 1.
  • the pump arrangement includes a compressor 2, a pressure reduction valve 5, a heat exchanger 4 and an oil separator 3 and gaseous or liquid refrigerants arriving in the suction line 6 in the arrowed direction will first pass through the valve 5 and then through one chamber of the heat exchanger 4 and will enter the compressor 2 in a gaseous state.
  • the refrigerant leaves the compressor, in which the pressure of the refrigerant is increased, the refrigerant is passed through the oil separator 3 and from there to the other chamber of the heat exchanger, in which the refrigerant is cooled and preferably leaves the pressure line 7 in a liquid state.
  • auxiliary devices for instance a drying filter on the suction side or a condenser on the pressure side.
  • This latter auxiliary may be necessary when the heat exchanger does not cool the refrigerant adequately.
  • the pressure reduction valve will also preferably be of a kind which can be set to desired pressure drops, so as to enable the pump arrangement to be used optimally with all types of refrigerant.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Working Measures On Existing Buildindgs (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Sorption Type Refrigeration Machines (AREA)

Abstract

The invention relates to a method and to an arrangement (1) for enabling refrigerants, preferably freons, to be emptied from refrigeration systems or heat pump systems (9) with the aid of piston compressor pumps (2) when repairing or scrapping such systems. According to the invention, the compressor suction line (6) nearest the compressor is connected to one chamber of a heat exchanger (4) and a pressure reduction valve (5) is connected in the suction line upstream of the heat exchanger. The pressure line extending from the compressor pump (2) passes to an oil separator (3) and from there to the other chamber of the heat exchanger (4). The fall in pressure in the reduction valve (5) and heating of the refrigerant in the heat exchanger (4) means that the refrigerant will be in a gaseous state when reaching the compressor, which is a prerequisite for safe action of the compressor. The pressure increase achieved in the compressor pump (2) and cooling of the refrigerant in the heat exchanger (4) enables the refrigerant to be delivered to a container (8) in preferably a liquid state.

Description

A method and arrangement for pumping preferably refriger¬ ants
Technical Field
The present invention relates to a method and to an arrangement which will enable the use of a piston com- pressor pump in pumping preferably refrigerants of low boiling points, either in a liquid or a gaseous state, for instance freons, from a first refrigerant circuit or container to a second refrigerant circuit or container.
Background Prior Art
The developments of refrigerators and freezer systems have resulted in the extensive use of different types of freons as the refrigerating medium. When repairing and scrapping small refrigerating and freezer systems recovery of the refrigerant has been ignored, since there is no method by means of which the refrigerant can be recovered easily and quickly and at relatively low costs. Instead, these freons have been quite simply released into the atmosphere. In the case of larger systems, attempts have been made, in comparable situations, to recover as much of the refriger¬ ant as possible, with the aid of relatively expensive and unmanageable pistonless compressor pumps.
The recently recognized fact that freons have a harmful effect on the atmospheric protective ozone layer encircl¬ ing the earth has led to a demand for a reduction in freon emissions to atmosphere. This demand has led to the deve¬ lopment of freon suction devices, or freon-exhausterε, based on the use of piston compressors of the kind which are mass produced in large numbers, and therewith at rela¬ tively small costs, for use in conjunction with compressor driven refrigerators and freezers. These freon suction devices, however, are only suitable for extracting freon in gas form, since liquid freon cannot be compressed and consequently the compressor will be seriously damaged if liquid freon should enter a working piston compressor. Consequently, when emptying such refrigerating systems, which contain freon in both a liquid and a gaseous state in different parts of the system, it is recommended that the system is emptied from the gas side and that the liquid freon is permitted to pass to a gaseous state in the system during the process of emptying the system. Such an emptying process will take a long time to complete, however, and is not entirely safe, since there is always a risk that liquid freon will enter the pump and cause serious pump damage.
Summary of the Invention
One object of the invention is to provide a method and apparatus which will enable a refrigerating system to be emptied quickly and safely from both the gas and the liquid side thereof. Another object is to provide less costly, readily handled and readily transported freon suction devices, by enabling such devices to be con- structed with the aid of known, mass produced components. These objects are achieved in accordance with the inven¬ tion by means of an inventive method and arrangement having the characteristic features set forth in the following method and apparatus claims.
Brief Description of the Drawing
The invention will now be described in more detail with reference to the accompanying drawing, in which Figure 1 illustrates schematically an inventive method of pumping refrigerant from a refrigerating system to a container with the aid of a piston compressor pump, and Figure 2 is a side view which illustrates schematically alternative positioning of the main components of an inventive arrangement.
Description of a Preferred Embodiment
Figure 1 illustrates schematically the inventive method of pumping refrigerant, e.g. freon, from a refrigerating . plant or system 9, only part of which is shown, to a container 8, and the reference numeral 1 in said Figure identifies a broken line surrounding a pump arrangement which includes those components necessary for carrying out the method. In addition to a piston compressor pump 2 and an oil separator 3 associated therewith, these components also include a heat exchanger 4 which is provided with two chambers or pipe systems, and a pressure reduction valve 5. One chamber of the heat exchanger 4 is connected in the pipe or line through which refrigerant is delivered to the compressor 2, i.e. the suction line 6, at a location close to the compressor, and the pressure reduction valve 5 is connected to the line 6 at a location upstream of the com¬ pressor as seen in the direction of refrigerant flow to the compressor. The pipe or line extending from the com- pressor 2, i.e. the pressure line 7, first passes through an oil separator 3, in which any oil present in the refri¬ gerant and picked up from the compressor is separated from the refrigerant and returned to the compressor. The refri¬ gerant is then passed to the other chamber of the heat exchanger 4, before it can be connected to a collecting container or cylinder 8.
The refrigerating plant 9, of which only part is shown and the operating principles of which are assumed to be known, includes a cooling compressor 12 which has a respective closure valve 10, 11 mounted on the suction and pressure side thereof. With respect to the preferred state of the refrigerant in the refrigerating system of the plant 9, the refrigerating system can be divided into a gas side and a liquid side, with the compressor 12 and a system expansion valve (not shown) being arranged in the zones between said sides. The gas side is referenced A and the liquid side B and a broken line through the compressor 12 marks an imaginary boundary between these sides. For the purpose of transferring refrigerant to the container 8, the suction line 6 of the pump arrangement 1 is connected to both the gas side A and the liquid side B of the refri¬ gerating plant 9 by means of two branch lines 13 and 14. The refrigerating system can therewith be emptied of refrigerant either from solely the gas side A or solely the liquid side B or from both side A and side B simultan¬ eously, by adjusting the settings of valves 10 and 11 accordingly. When the system is emptied from the B-side, the refrigerant will arrive at the reduction valve 5 preferably under pressure and in a liquid state and a greater part of the refrigerant will be converted to gas form in the pressure reduction valve. The refrigerant then passes through one of the chambers of the heat exchanger 4, which operates in accordance with the counterflow prin¬ ciple and in which any liquid refrigerant in the refriger- ant flow will be progressively heated and therewith gasified. The refrigerant entering the compressor 2 is thus in a gaseous state and is compressed in the com¬ pressor and then passed to the oil separator 3, in which any oil present in the refrigerant is removed therefrom, whereafter the refrigerant is passed under pressure to the other chamber of the heat exchanger 4, where it is pro¬ gressively cooled to a liquid state such as to enable it to be fed into the container or cylinder 8. Thus, the refrigerant cooled by pressure reduction in the suction line 6 will be heated in the heat exchanger 4 by the refrigerant heated by compression in the pressure line at the same time as the refrigerant in the pressure line 7 is cooled by the medium in the suction line 6.
Figure 2 is a side view which illustrates schematically an alternative positioning of the main components of an in¬ ventive pump arrangement enclosed in a casing 1. The pump arrangement includes a compressor 2, a pressure reduction valve 5, a heat exchanger 4 and an oil separator 3 and gaseous or liquid refrigerants arriving in the suction line 6 in the arrowed direction will first pass through the valve 5 and then through one chamber of the heat exchanger 4 and will enter the compressor 2 in a gaseous state. When the refrigerant leaves the compressor, in which the pressure of the refrigerant is increased, the refrigerant is passed through the oil separator 3 and from there to the other chamber of the heat exchanger, in which the refrigerant is cooled and preferably leaves the pressure line 7 in a liquid state.
Depending on the various factors involved, such as the boiling point of the medium to be pumped for instance, it may be necessary to supplement the pump arrangement 1 with auxiliary devices, for instance a drying filter on the suction side or a condenser on the pressure side. This latter auxiliary may be necessary when the heat exchanger does not cool the refrigerant adequately. The pressure reduction valve will also preferably be of a kind which can be set to desired pressure drops, so as to enable the pump arrangement to be used optimally with all types of refrigerant.

Claims

1. A method for enabling the use of a piston compressor pump (2) when pumping preferably refrigerants of low boiling points and being in both a gaseous and a liquid state, e.g. freons. from a first refrigerant circuit or container (9) to a second refrigerant circuit or container (8), characterized by connecting a pressure reduction valve (5) and one chamber of a heat exchanger (4) to the pump suction circuit (6) intended for connection to the first refrigerant circuit (9), in a manner such that when the refrigerant is pumped said "refrigerant will first pass through the pressure reduction valve (5) and then through the heat exchanger (4); and by connecting the other cham¬ ber of the heat exchanger (4) to the pressure circuit (7) intended for connection to the other refrigerant circuit or container (8), whereby when the refrigerant is pumped, the refrigerant will arrive at the compressor (2) in a gaseous state as a result of the drop in pressure occur- rent in the pressure reduction valve (5) and heating of the refrigerant in the heat exchanger (4) and will be delivered to the second refrigerant circuit or container (8) preferably in a liquid state as a result of the pressure increase achieved in the compressor (2) and of cooling the refrigerant in the heat exchanger (4).
2. Apparatus for enabling the use of a piston compressor pump (2) in pumping preferably refrigerants of low boiling-points and being in both a gaseous and a liquid state, e.g. freons, from a first refrigerant circuit or container (9) to a second refrigerant circuit or container (8). characterized in that the arrangement includes a pressure reduction valve (5) and a heat exchanger (4) which comprises two chambers or pipe systems; in that the valve (5) and one heat exchanger chamber are connected to the compressor suction circuit (6) intended for connection to the first refrigerant circuit (9), such that when the refrigerant is pumped said refrigerant will first pass through the pressure reduction valve (5) and then through the heat exchanger; in that the other heat exchanger chamber is connected to the compressor pressure circuit intended for connection to the second refrigerant circuit or container, wherewith when refrigerant is pumped, the refrigerant will arrive at the compressor in a gaseous state, as a result of the pressure drop achieved in the reduction valve (5) and heating of the refrigerant in the heat exchanger (4), and wherewith the refrigerant is delivered to the second refrigerant circuit or container (8) in preferably a liquid state, as a result of the pressure increase achieved in the compressor (2) and cooling of the refrigerant in the heat exchanger (4).
PCT/SE1989/000029 1988-01-28 1989-01-27 A method and arrangement for pumping preferably refrigerants Ceased WO1989007227A1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
AU30360/89A AU624358B2 (en) 1988-01-28 1989-01-27 A method and arrangement for pumping preferably refrigerants
BR898907215A BR8907215A (en) 1988-01-28 1989-01-27 PROCESS AND APPARATUS TO ENABLE THE USE OF A PUMP COMPRESSOR PUMP
AT89902096T ATE87358T1 (en) 1988-01-28 1989-01-27 METHOD AND DEVICE FOR REFRIGERANT RECOVERY.
KR1019890701784A KR930005667B1 (en) 1988-01-28 1989-01-27 Method and arrangement for pumping refrigerants
NO903278A NO170652C (en) 1988-01-28 1990-07-23 PROCEDURE AND DEVICE FOR PUMPING, REFERENCE TO A REFRIGERANT
DK176790A DK169528B1 (en) 1988-01-28 1990-07-25 Method and apparatus for pumping, preferably refrigerants
FI903768A FI91560C (en) 1988-01-28 1990-07-27 Method and apparatus most preferably for pumping refrigerants

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8800282-9 1988-01-28
SE8800282A SE462238B (en) 1988-01-28 1988-01-28 PROCEDURE AND DEVICE FOR PUMPING OF REFRIGERATORS BY GAS OR WETHER

Publications (1)

Publication Number Publication Date
WO1989007227A1 true WO1989007227A1 (en) 1989-08-10

Family

ID=20371210

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1989/000029 Ceased WO1989007227A1 (en) 1988-01-28 1989-01-27 A method and arrangement for pumping preferably refrigerants

Country Status (14)

Country Link
US (1) US5067325A (en)
EP (1) EP0397760B1 (en)
JP (1) JPH03502358A (en)
KR (1) KR930005667B1 (en)
AT (1) ATE87358T1 (en)
AU (1) AU624358B2 (en)
BR (1) BR8907215A (en)
CA (1) CA1328356C (en)
DE (1) DE68905593T2 (en)
DK (1) DK169528B1 (en)
FI (1) FI91560C (en)
NO (1) NO170652C (en)
SE (1) SE462238B (en)
WO (1) WO1989007227A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6314749B1 (en) 2000-02-03 2001-11-13 Leon R. Van Steenburgh, Jr. Self-clearing vacuum pump with external cooling for evacuating refrigerant storage devices and systems
US8479526B2 (en) 2006-07-21 2013-07-09 Daikin Industries, Ltd. Refrigerant charging method for refrigeration device having carbon dioxide as refrigerant

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992016801A1 (en) * 1991-03-22 1992-10-01 Environmental Products Amalgamated Pty. Ltd. Apparatus for servicing refrigeration systems
US6408637B1 (en) 1999-11-01 2002-06-25 Century Mfg. Co. Apparatus and method for recovering and recycling refrigerant
CN108168166B (en) * 2018-02-01 2023-11-24 青岛绿环工业设备有限公司 Low-temperature auxiliary refrigerant recovery system

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3232070A (en) * 1963-05-17 1966-02-01 Spormac Sales Company Refrigerant saver
US3699781A (en) * 1971-08-27 1972-10-24 Pennwalt Corp Refrigerant recovery system
US4261178A (en) * 1979-01-19 1981-04-14 Robinair Manufacturing Corporation Environmental protection refrigeration disposal and charging system
US4476688A (en) * 1983-02-18 1984-10-16 Goddard Lawrence A Refrigerant recovery and purification system
US4646527A (en) * 1985-10-22 1987-03-03 Taylor Shelton E Refrigerant recovery and purification system
DE3616591A1 (en) * 1986-05-16 1987-11-19 Weiss Umwelttechnik Gmbh METHOD AND DEVICE FOR CONVERTING REFRIGERANTS FROM A REFRIGERANT CIRCUIT INTO A REFRIGERANT STORAGE

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5824655Y2 (en) * 1978-08-30 1983-05-27 トヨタ自動車株式会社 Shock energy absorption device
US4363222A (en) * 1979-01-19 1982-12-14 Robinair Manufacturing Corporation Environmental protection refrigerant disposal and charging system
US4862699A (en) * 1987-09-29 1989-09-05 Said Lounis Method and apparatus for recovering, purifying and separating refrigerant from its lubricant
US4938031A (en) * 1987-11-04 1990-07-03 Kent-Moore Corporation Refrigerant recovery and purification system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3232070A (en) * 1963-05-17 1966-02-01 Spormac Sales Company Refrigerant saver
US3699781A (en) * 1971-08-27 1972-10-24 Pennwalt Corp Refrigerant recovery system
US4261178A (en) * 1979-01-19 1981-04-14 Robinair Manufacturing Corporation Environmental protection refrigeration disposal and charging system
US4476688A (en) * 1983-02-18 1984-10-16 Goddard Lawrence A Refrigerant recovery and purification system
US4646527A (en) * 1985-10-22 1987-03-03 Taylor Shelton E Refrigerant recovery and purification system
DE3616591A1 (en) * 1986-05-16 1987-11-19 Weiss Umwelttechnik Gmbh METHOD AND DEVICE FOR CONVERTING REFRIGERANTS FROM A REFRIGERANT CIRCUIT INTO A REFRIGERANT STORAGE

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6314749B1 (en) 2000-02-03 2001-11-13 Leon R. Van Steenburgh, Jr. Self-clearing vacuum pump with external cooling for evacuating refrigerant storage devices and systems
US8479526B2 (en) 2006-07-21 2013-07-09 Daikin Industries, Ltd. Refrigerant charging method for refrigeration device having carbon dioxide as refrigerant
US9869498B2 (en) 2006-07-21 2018-01-16 Daikin Industries, Ltd. Refrigerant charging method for refrigeration device having carbon dioxide as refrigerant

Also Published As

Publication number Publication date
DE68905593D1 (en) 1993-04-29
FI91560B (en) 1994-03-31
NO903278L (en) 1990-07-23
NO170652B (en) 1992-08-03
FI91560C (en) 1994-07-11
NO903278D0 (en) 1990-07-23
SE8800282L (en) 1989-07-29
DK176790A (en) 1990-07-25
ATE87358T1 (en) 1993-04-15
AU624358B2 (en) 1992-06-11
KR930005667B1 (en) 1993-06-24
KR900700832A (en) 1990-08-17
SE8800282D0 (en) 1988-01-28
AU3036089A (en) 1989-08-25
CA1328356C (en) 1994-04-12
NO170652C (en) 1992-11-11
EP0397760A1 (en) 1990-11-22
EP0397760B1 (en) 1993-03-24
FI903768A0 (en) 1990-07-27
SE462238B (en) 1990-05-21
BR8907215A (en) 1991-03-05
DK176790D0 (en) 1990-07-25
DK169528B1 (en) 1994-11-21
JPH03502358A (en) 1991-05-30
DE68905593T2 (en) 1993-10-07
US5067325A (en) 1991-11-26

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