WO1986001882A1 - Device for returning oil to at least one compressor in a cooling or refrigerating system - Google Patents

Device for returning oil to at least one compressor in a cooling or refrigerating system Download PDF

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Publication number
WO1986001882A1
WO1986001882A1 PCT/SE1985/000350 SE8500350W WO8601882A1 WO 1986001882 A1 WO1986001882 A1 WO 1986001882A1 SE 8500350 W SE8500350 W SE 8500350W WO 8601882 A1 WO8601882 A1 WO 8601882A1
Authority
WO
WIPO (PCT)
Prior art keywords
oil
gas
collecting container
suction conduit
intake
Prior art date
Application number
PCT/SE1985/000350
Other languages
French (fr)
Inventor
Hans Erik Evald Olson
Original Assignee
Olson Hans E E
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 Olson Hans E E filed Critical Olson Hans E E
Priority to DE8585904695T priority Critical patent/DE3567266D1/en
Priority to AT85904695T priority patent/ATE39752T1/en
Publication of WO1986001882A1 publication Critical patent/WO1986001882A1/en
Priority to NO86861891A priority patent/NO164126C/en
Priority to DK222586A priority patent/DK154245C/en

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
    • F25B31/00—Compressor arrangements
    • F25B31/002—Lubrication
    • F25B31/004—Lubrication oil recirculating arrangements
    • 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
    • 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
    • F25B2400/07—Details of compressors or related parts
    • F25B2400/075—Details of compressors or related parts with parallel compressors

Definitions

  • This invention relates to a device for returning oil to at least one compressor in a cooling or refrigerating system in which the compressor sucks oil from at least one oil col ⁇ lecting container through at least one suction conduit connec- ted to the collecting container and having one or more gas or oil intakes situated above the oil level in the collec ⁇ ting container.
  • GB patent specification 699,568 describes and shows an oil returning device which does not, however, permit retur ⁇ ning the oil together with the refrigerant.
  • a definite oil level must be maintained in the collecting pipe, which is difficult to realize in practice.
  • the object of the present invention is to provide a de- vice which permits returning . oil together with refrigerant and which ensures a continuous oil supply to the compressor when in operation irrespectively of -whether there are small or large amounts of oil in the collecting pipe.
  • This is achi- ved according to the invention substantially with the use of the characteristic features defined in the appendant claim 1» Applying the features indicated in claim 1, it is rea- lized that, after the foaming of the oil at the start of the compressor has produced an oil coating on the inside of the collecting pipe up to the gas and oil intake, the oil can be caused to creep continuously upward on the walls of the col ⁇ lecting container and continuously sucked into the suction pipe and via the latter continuously into the compressor.
  • figure 1 diagrammatically illustrates a freezing plant comprising a device according to the invention
  • figure 2 is a section on line II-II in figure 1, that is through a collecting container and a suction pipe of the freezing plant.
  • the freezing plant illustrated comprises three compres ⁇ sors 1 which are adapted to pump out hot gas through a hot gas conduit 2.
  • large amounts of oil accompany the gas out of the compressors 1 and the major portion of this oil is separated from the hot gas in an oil separator 3 from which the oil is refluxed to the compressors 1 via a reflux pipe 4 which is provided with one oil level control 5 for each compressor 1.
  • a reflux pipe 4 which is provided with one oil level control 5 for each compressor 1.
  • no complete oil separa ⁇ tion can be attained in the oil separator 3 some oil will accompany the hot gas through the conduit 6 to a condensor 7 and via the condensate therefrom through a conduit 8 to a refrigerant container 9.
  • the oil then accompanies the refrige- rant from the refrigerant container 9 through a conduit 10 to an evaporator 11 and the refrigerant vapour from said eva ⁇ porator to a collecting container 13.
  • the intention then is for the oil 16 collected in the collecting container 13 to be supplied to the compressors 1 continuously and as uniform- ly distributed as possible between said compressors through suction conduits 14 which are adapted to supply gas in the form of refrigerant vapour from the collecting container 13 to the compressors 1.
  • each suction conduit 14 is pro ⁇ vided with at least one gas and oil intake 15 which is loca ⁇ ted above the oil level 16a of the collecting container 13, connects onto the inside 17 of the collecting container 13 and has a substantially smaller throughflow area than the collecting container 13 to bring about such a gas velocity in the gas and oil intake 15 that the gas in capable of carrying along the collected oil 16 in an upward direction on the inside 17 of the collecting container 13 to the gas and oil intake 15 after the inside 17 has been coated with an oil film generated by the foaming of the oil at the start of the compressors.
  • the oil 16 contained at the bottom of the collecting con ⁇ tainer 13 will foam up, said foaming being so vigorous that the inside 17 of the collecting container 13 is coated with an oil film 19 all the way up to the gas and oil intake 15.
  • the gas will successively suck the oil film 19 into the gas and oil intake 15 and the film-like oil flow 19 will successively be replenished from below with oil 16 from the lower portions of the collecting container 13.
  • the oil will "creep" from the lower portions of the collecting container 13 on the inside 17 to the gas and oil intake 15 in a continuous oil flow 19.
  • the gas and oil intake 15 is so arranged that the oil flow 19 is not interrupted when it passes from the in ⁇ side 17 into the suction conduit 14.
  • Such an uninterrupted flow can be brought about because the upper edge 20 of the ga and oil intake 15 lies in the prolongation of the inside 17, i.e. the upper edge 20 connects exactly onto the inside 17 to form a prolonged part thereof. It is not, however, absolutel necessary for the upper edge 20 to be placed absolutely exactly in the prolongation of the inside 17 but said upper edge 20 can be placed at a slightly higher level without causing any decisive negative interruption of the flow.
  • the oil flow can also be kept fairly undisturbed if the upper edge 20 for some reason should end up slightly below the prolongation of the inside 17.
  • a threshold bu provided this threshold is not too high and the gas velocity is sufficient, the gas will nevertheless be able to "suck” the oil « into the suction conduit 14.
  • Such a “threshold” should, however, be avoidedas a rule because it will interrupt the oil flow 19 if it extends too far downward below the prolongation of the inside 17 and/or if the gas velocity is insufficient.
  • the parts 21 of the suction conduit 14 which are situated inside the gas and oil intake 15 present substantially the same throughflow area as the gas and oil intake 15. As a result, the velocity of the gas flowing into the suction conduit 14 is maintained, which in turn implies an effective oil transport also in ⁇ side the gas and oil intake 15.
  • the said parts 21 of the suction conduit 14 may be provided with a filling 23.
  • a structurally simple embodiment is obtained by provi ⁇ ding the suction conduit 14 with an end portion 22 which is lowered radially into the collecting container 13 and which in its side wall has two gas and oil intakes 15 opposite one another, as shown in figure 2.
  • the suction conduit 14 may preferably be vertically directed and inserted in the upper part of the collecting container 13 such that the gas and oil intakes 15 will con ⁇ nect onto the uppermost portions of the inside 17.
  • the collecting container 13 may be a pipe of circular cross section and the suction conduit 14 may be radially directed in relation to said pipe.
  • the suction conduit 14 has a shoulder 24 which is spaced from the gas and oil intake 15 a distance corresponding to the wall thickness of the collec ⁇ ting container 13.
  • the shoulder 24 is preferably formed by a transitional portion at which the suction conduit 14 outsid the collecting container 13 merges into an end portion 22 of smaller diameter.
  • Said shoulder 24 permits disposing the gas and oil intake 15 of the suction conduit 14 in exactly correct relation to the inside 17 of the collecting container 13 simply by inserting the suction couduit 14 in a hole made for that purpose in the collecting container 13 until the shoulder 24 abuts against the outer side 25 of the collecting container 13.
  • the device can also be uti ⁇ lised in refrigerating systems, and the constituent parts may vary in shape, disposition and number and still function in the manner contemplated.
  • the device is usable for one and preferably for several compressors. In the latter case, it can be utilised to advantage for a uniform oil distribu ⁇ tion between the compressors.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Power Engineering (AREA)
  • Compressor (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)

Abstract

Device for returning oil to at least one compressor (1) in a cooling or refrigerating system, in which the compressor sucks oil (16) from an oil collecting container (13) through at least one suction conduit (14) connected to the collecting container (13) and having one or more gas and oil intakes (15) which is or are situated above the oil level (16a) in the collecting container (13). To permit returning oil together with refrigerant and ensure a continuous oil supply to the compressor when in operation irrespectively of whether there are small or large oil amounts in the collecting container, the suction conduit (14) connects the gas and oil intake (15) to the inside (17) of the collecting container (13) above the oil level (16a) therein, and the gas and oil intake (15) has a substantially smaller throughflow area than the collecting container (13) to produce such a gas velocity in the gas and oil intake (15) that after the oil (16) collected in the collecting container (13) has been foamed up at the start of the compressors, the gas is capable of elevating the collected oil (16) on the inside of the collecting container (13) to the suction conduit gas and oil intake (15) and carrying it farther into the suction conduit (14) as the intake or intakes are connected to the inside (17) of the collecting container (13).

Description

Device for returning oil to at least one compressor in a cooling or refrigerating system.
This invention relates to a device for returning oil to at least one compressor in a cooling or refrigerating system in which the compressor sucks oil from at least one oil col¬ lecting container through at least one suction conduit connec- ted to the collecting container and having one or more gas or oil intakes situated above the oil level in the collec¬ ting container.
Devices of the type outlined above suffer from the drawback that large amounts of oil may collect in the collec- ting container so that the compressor crankcase "may be emp¬ tied of oil. Owing to such lack of oil therein the compres¬ sor may seize. To remedy this drawback attempts have been made to provide a continuous return of oil from the collec¬ ting container to the compressor with the aid of various kinds of devices. However, with such prior-art devices the oil risks to be drawn into the compressor portion-wise, which is unsuitable as the compressor may thereby be da-a a- ged. Moreover, large amounts of refrigerant risk to be drawn into the compressor, which may also result in damage to the compressor.
GB patent specification 699,568 describes and shows an oil returning device which does not, however, permit retur¬ ning the oil together with the refrigerant. For a rational function of the prior-art oil returning device a definite oil level must be maintained in the collecting pipe, which is difficult to realize in practice.
US patent specifications 3,581,519 and 3,792,594 describe and show oil returning devices which do not either permit returning the oil together with the refrigerant. In these previously known devices, oil return conduits extend from the bottom portions of the collecting containers in order to return separated oil. No return of oil together with refrige¬ rant takes place in these devices either.
The object of the present invention is to provide a de- vice which permits returning .oil together with refrigerant and which ensures a continuous oil supply to the compressor when in operation irrespectively of -whether there are small or large amounts of oil in the collecting pipe. This is achi- ved according to the invention substantially with the use of the characteristic features defined in the appendant claim 1» Applying the features indicated in claim 1, it is rea- lized that, after the foaming of the oil at the start of the compressor has produced an oil coating on the inside of the collecting pipe up to the gas and oil intake, the oil can be caused to creep continuously upward on the walls of the col¬ lecting container and continuously sucked into the suction pipe and via the latter continuously into the compressor. The invention is elucidated more in detail below with reference to the accompanying drawings in which: figure 1 diagrammatically illustrates a freezing plant comprising a device according to the invention; and figure 2 is a section on line II-II in figure 1, that is through a collecting container and a suction pipe of the freezing plant.
The freezing plant illustrated comprises three compres¬ sors 1 which are adapted to pump out hot gas through a hot gas conduit 2. At the discharge of the hot gas, large amounts of oil accompany the gas out of the compressors 1 and the major portion of this oil is separated from the hot gas in an oil separator 3 from which the oil is refluxed to the compressors 1 via a reflux pipe 4 which is provided with one oil level control 5 for each compressor 1. As no complete oil separa¬ tion can be attained in the oil separator 3 some oil will accompany the hot gas through the conduit 6 to a condensor 7 and via the condensate therefrom through a conduit 8 to a refrigerant container 9. The oil then accompanies the refrige- rant from the refrigerant container 9 through a conduit 10 to an evaporator 11 and the refrigerant vapour from said eva¬ porator to a collecting container 13. The intention then is for the oil 16 collected in the collecting container 13 to be supplied to the compressors 1 continuously and as uniform- ly distributed as possible between said compressors through suction conduits 14 which are adapted to supply gas in the form of refrigerant vapour from the collecting container 13 to the compressors 1.
To realize such a continuous oil supply to the compres- sors 1 and to ensure that the oil is distributed as uniformly as possible between them, each suction conduit 14 is pro¬ vided with at least one gas and oil intake 15 which is loca¬ ted above the oil level 16a of the collecting container 13, connects onto the inside 17 of the collecting container 13 and has a substantially smaller throughflow area than the collecting container 13 to bring about such a gas velocity in the gas and oil intake 15 that the gas in capable of carrying along the collected oil 16 in an upward direction on the inside 17 of the collecting container 13 to the gas and oil intake 15 after the inside 17 has been coated with an oil film generated by the foaming of the oil at the start of the compressors. Thus, at the start of the compressors the oil 16 contained at the bottom of the collecting con¬ tainer 13 will foam up, said foaming being so vigorous that the inside 17 of the collecting container 13 is coated with an oil film 19 all the way up to the gas and oil intake 15. By reason of the high gas velocity in the gas and oil intake 15 the gas will successively suck the oil film 19 into the gas and oil intake 15 and the film-like oil flow 19 will successively be replenished from below with oil 16 from the lower portions of the collecting container 13. As long as said high gas velocity is maintained the oil will "creep" from the lower portions of the collecting container 13 on the inside 17 to the gas and oil intake 15 in a continuous oil flow 19. The gas and oil intake 15 is so arranged that the oil flow 19 is not interrupted when it passes from the in¬ side 17 into the suction conduit 14. Such an uninterrupted flow can be brought about because the upper edge 20 of the ga and oil intake 15 lies in the prolongation of the inside 17, i.e. the upper edge 20 connects exactly onto the inside 17 to form a prolonged part thereof. It is not, however, absolutel necessary for the upper edge 20 to be placed absolutely exactly in the prolongation of the inside 17 but said upper edge 20 can be placed at a slightly higher level without causing any decisive negative interruption of the flow. The oil flow can also be kept fairly undisturbed if the upper edge 20 for some reason should end up slightly below the prolongation of the inside 17. Certainly there will thus be formed a threshold bu provided this threshold is not too high and the gas velocity is sufficient, the gas will nevertheless be able to "suck" the oil « into the suction conduit 14. Such a "threshold" should, however, be avoidedas a rule because it will interrupt the oil flow 19 if it extends too far downward below the prolongation of the inside 17 and/or if the gas velocity is insufficient. To ensure an effective oil transport in the suction con¬ duit 14 inside the gas and oil intake 15 the parts 21 of the suction conduit 14 which are situated inside the gas and oil intake 15 present substantially the same throughflow area as the gas and oil intake 15. As a result, the velocity of the gas flowing into the suction conduit 14 is maintained, which in turn implies an effective oil transport also in¬ side the gas and oil intake 15.
To provide substantially the same throughflow area of the gas and oil intake 15 as that of the parts 21 of the suction conduit 14 situated inside the intake 15, the said parts 21 of the suction conduit 14 may be provided with a filling 23.
A structurally simple embodiment is obtained by provi¬ ding the suction conduit 14 with an end portion 22 which is lowered radially into the collecting container 13 and which in its side wall has two gas and oil intakes 15 opposite one another, as shown in figure 2. In some cases it may, however, be possible or advantageous to arrange another number of gas and oil intakes in the suction conduit 14. The suction conduit 14 may preferably be vertically directed and inserted in the upper part of the collecting container 13 such that the gas and oil intakes 15 will con¬ nect onto the uppermost portions of the inside 17. As shown in figure 2, the collecting container 13 may be a pipe of circular cross section and the suction conduit 14 may be radially directed in relation to said pipe. The pipe prefera¬ bly extends horizontally and the suction conduit 14 need not necessarily be vertically directed but may possibly extend at an inclination of approximately 45 in relation to the pipe such that the distance between the oil level 16a and the end portion 22 of the suction pipe 14 is shortened.
To ensure at the mounting of the suction conduit 14 to the collecting container 13 that the gas and oil intake 15 will take the desired position in relation to the inside 17 of the collecting container 13, the suction conduit 14 has a shoulder 24 which is spaced from the gas and oil intake 15 a distance corresponding to the wall thickness of the collec¬ ting container 13. The shoulder 24 is preferably formed by a transitional portion at which the suction conduit 14 outsid the collecting container 13 merges into an end portion 22 of smaller diameter. Said shoulder 24 permits disposing the gas and oil intake 15 of the suction conduit 14 in exactly correct relation to the inside 17 of the collecting container 13 simply by inserting the suction couduit 14 in a hole made for that purpose in the collecting container 13 until the shoulder 24 abuts against the outer side 25 of the collecting container 13.
The invention is not restricted to the embodiment described and illustrated but can be varied within the scope of the appended claims. Thus, the device can also be uti¬ lised in refrigerating systems, and the constituent parts may vary in shape, disposition and number and still function in the manner contemplated. The device is usable for one and preferably for several compressors. In the latter case, it can be utilised to advantage for a uniform oil distribu¬ tion between the compressors.

Claims

Claims;
1. A device for returning oil to at least one compressor in a cooling or refrigerating system, in which the compressor sucks oil (16) from at least one oil collecting container through at least one suction conduit (14) connected to the collecting container (13) and having one or more gas and oil intakes (15) situated above the oil level (16a) in the col¬ lecting container (13) , c h a r a c t e r i z e d i n that the gas and oil intake (15) connects onto the inside (17) of the collecting container (13) above the oil level (16a) and that the gas and oil intake (15) has a substan¬ tially smaller throughflow area than the collecting contai¬ ner (13) to produce such a gas velocity in the gas and oil intake (15) that after the oil (16) collected in the collec¬ ting container (13) has been foamed up at the start of the compressors, the gas is capable of elevating the collected oil (16) on the inside of the collecting container (13) to the suction conduit gas and oil intake (15) above the oil level (16a) and carrying it farther into the suction conduit (14) as said intake or intakes are connected to the inside (17) of the collecting container (13) .
2. A device as claimed in claim 1, c h a r a c t e r i¬ z e d i n that the gas and oil intake (15) of the suction conduit (14) connects onto the inside (17) of the collec¬ ting container (13) as the upper edge (20) of said gas and oil intake lies in the prolongation of the inside (17) .
3. A device as claimed in claim 1 or 2, c h a r a c ¬ t e r i z e d i n that inside the gas and oil intake (15) the suction conduit (14) has substantially the same through¬ flow area as the gas and oil intake (15) to maintain the velocity of the gas flowing into the suction conduit (14) .
4. A device as claimed in any one of the preceding claims, c h a r a c t e r i z e d i n that the gas and oil intake (15) is disposed in the side wall of an end por¬ tion (22) of the suction conduit (14) , which end portion ex- tends radially dovm into" the collecting container (13) , an upper edge (20) of the gas and oil intake (15) connecting onto the inside (17) of the collecting container (13) .
5. A device as claimed in claim 4, c h a r a c t e r i - z e d i n that the end portion (22) of the suction con¬ duit (14) comprises two gas and oil intakes (15) which are arranged in opposite side walls of the end portion (22) .
6. A device as claimed in any one of the preceding claims, c h a r a c t e r i z e d i n that the suction conduit (14) has a shoulder (24) which is spaced from the gas and oil intake (15) a distance corresponding to the wall thickness of the collecting container (13) .
7. A device as claimed in claim 6, - c h a r a c t e r i- z e d i n that the shoulder (24) is formed by a transi¬ tional portion at which the parts of the suction conduit (14) outside the collecting container (13) merge into an end por¬ tion (22) of smaller diameter.
8. A device as claimed in claim 3, c h a r a c t e r i- z e d i n that inside the gas and oil intake (15) the suc¬ tion conduit (14) comprises a filling (23) which fills out parts (21) of the suction conduit (14) to provide substan¬ tially the same throughflow area of said suction conduit parts (21) as that of the gas and oil intake (15) .
9. A device as claimed in any of the preceding claims, c h a r a c t e r i z e d i n that the suction conduit (14) is substantially vertically directed down into the col¬ lecting container (13) .
10. A device as claimed in claim 9, in which the collec- ting container (13) is in the form of a horisontally exten¬ ding pipe of circular cross section, c h a r a c t e r i¬ z e d i n that the suction conduit (14) is radially direc¬ ted down into the pipe.
PCT/SE1985/000350 1984-09-17 1985-09-16 Device for returning oil to at least one compressor in a cooling or refrigerating system WO1986001882A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE8585904695T DE3567266D1 (en) 1984-09-17 1985-09-16 A cooling or refrigerating system
AT85904695T ATE39752T1 (en) 1984-09-17 1985-09-16 REFRIGERATION OR FREEZE SYSTEM.
NO86861891A NO164126C (en) 1984-09-17 1986-05-13 DEVICE FOR BACKUP OF OIL TO AT LEAST A COMPRESSOR IN A COOL-OR FREEZING SYSTEM.
DK222586A DK154245C (en) 1984-09-17 1986-05-14 DEVICE FOR REPLACING OIL IN A COOLING OR FREEZING PLANT BACK TO AT LEAST ONE COMPRESSOR

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8404641-6 1984-09-17
SE8404641A SE8404641L (en) 1984-09-17 1984-09-17 DEVICE FOR APPLYING OIL TO A REFRIGERATOR

Publications (1)

Publication Number Publication Date
WO1986001882A1 true WO1986001882A1 (en) 1986-03-27

Family

ID=20357026

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1985/000350 WO1986001882A1 (en) 1984-09-17 1985-09-16 Device for returning oil to at least one compressor in a cooling or refrigerating system

Country Status (9)

Country Link
US (1) US4702089A (en)
EP (1) EP0196314B1 (en)
JP (1) JPS62500259A (en)
AT (1) ATE39752T1 (en)
DE (1) DE3567266D1 (en)
DK (1) DK154245C (en)
NO (1) NO164126C (en)
SE (1) SE8404641L (en)
WO (1) WO1986001882A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0260336A1 (en) * 1986-09-16 1988-03-23 TEKO Gesellschaft für Kältetechnik GmbH Liquid separator for a set of air or water cooled refrigeration machines for permanent oil return

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Publication number Priority date Publication date Assignee Title
SE463380B (en) * 1988-07-08 1990-11-12 Olson Ref H Olson Refrigeratio MIDDLE COOLING DEVICE WITH OIL SEPARATOR AT REFRIGERATING AND COLD FACILITIES
US4829786A (en) * 1988-08-15 1989-05-16 American Standard Inc. Flooded evaporator with enhanced oil return means
US5471854A (en) * 1994-06-16 1995-12-05 Automotive Fluid Systems, Inc. Accumulator for an air conditioning system
DE19921975A1 (en) * 1999-05-12 2000-11-16 Volkswagen Ag Collector for coolants in a vehicle air conditioning installation consists of upper and lower shells connected to each other by means of a weld seam.
CN104567147B (en) * 2013-10-23 2017-02-15 珠海格力电器股份有限公司 Gas-liquid separation device and refrigerating unit
CN106642774A (en) * 2017-01-27 2017-05-10 广州市粤联水产制冷工程有限公司 Thermal siphon oil cooling system

Citations (4)

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Publication number Priority date Publication date Assignee Title
US2003543A (en) * 1933-03-27 1935-06-04 Gen Household Utilities Compan Means for separating solution components and process of effecting separation thereof
GB699568A (en) * 1951-09-20 1953-11-11 Gen Electric Improvements relating to compression refrigerating systems
US3581519A (en) * 1969-07-18 1971-06-01 Emhart Corp Oil equalization system
US3792594A (en) * 1969-09-17 1974-02-19 Kramer Trenton Co Suction line accumulator

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Publication number Priority date Publication date Assignee Title
FR724821A (en) * 1930-12-27 1932-05-03 Improvements to the lubrication of compressors for refrigeration devices and other applications
US2364783A (en) * 1940-10-31 1944-12-12 Carrier Corp Oil return arrangement
US3177680A (en) * 1962-11-30 1965-04-13 Freightlines Corp Refrigeration system with oil return means
US3563053A (en) * 1968-09-16 1971-02-16 Edward W Bottum Suctiin accumulator
US4551990A (en) * 1984-10-18 1985-11-12 Honoshowsky John C Oil return apparatus for a refrigeration system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2003543A (en) * 1933-03-27 1935-06-04 Gen Household Utilities Compan Means for separating solution components and process of effecting separation thereof
GB699568A (en) * 1951-09-20 1953-11-11 Gen Electric Improvements relating to compression refrigerating systems
US3581519A (en) * 1969-07-18 1971-06-01 Emhart Corp Oil equalization system
US3792594A (en) * 1969-09-17 1974-02-19 Kramer Trenton Co Suction line accumulator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0260336A1 (en) * 1986-09-16 1988-03-23 TEKO Gesellschaft für Kältetechnik GmbH Liquid separator for a set of air or water cooled refrigeration machines for permanent oil return

Also Published As

Publication number Publication date
DK154245B (en) 1988-10-24
DK222586A (en) 1986-06-24
NO164126C (en) 1990-08-29
DE3567266D1 (en) 1989-02-09
JPS62500259A (en) 1987-01-29
NO861891L (en) 1986-06-05
US4702089A (en) 1987-10-27
SE443867B (en) 1986-03-10
EP0196314B1 (en) 1989-01-04
SE8404641L (en) 1986-03-10
DK154245C (en) 1989-03-28
ATE39752T1 (en) 1989-01-15
DK222586D0 (en) 1986-05-14
NO164126B (en) 1990-05-21
EP0196314A1 (en) 1986-10-08
SE8404641D0 (en) 1984-09-17

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