WO2002010656A1 - Dispositif servant a collecter et a remettre en circulation un lubrifiant et un refrigerant dans le circuit de refrigerant d'une installation frigorifique - Google Patents

Dispositif servant a collecter et a remettre en circulation un lubrifiant et un refrigerant dans le circuit de refrigerant d'une installation frigorifique Download PDF

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Publication number
WO2002010656A1
WO2002010656A1 PCT/DE2001/002498 DE0102498W WO0210656A1 WO 2002010656 A1 WO2002010656 A1 WO 2002010656A1 DE 0102498 W DE0102498 W DE 0102498W WO 0210656 A1 WO0210656 A1 WO 0210656A1
Authority
WO
WIPO (PCT)
Prior art keywords
refrigerant
collecting container
oil
suction
inlet
Prior art date
Application number
PCT/DE2001/002498
Other languages
German (de)
English (en)
Inventor
Volker Seipel
Jan Hinrichs
Original Assignee
Luk Fahrzeug-Hydraulik Gmbh & Co.Kg
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
Priority claimed from DE20022422U external-priority patent/DE20022422U1/de
Application filed by Luk Fahrzeug-Hydraulik Gmbh & Co.Kg filed Critical Luk Fahrzeug-Hydraulik Gmbh & Co.Kg
Priority to AU2001277473A priority Critical patent/AU2001277473A1/en
Publication of WO2002010656A1 publication Critical patent/WO2002010656A1/fr

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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
    • 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
    • F25B31/00—Compressor arrangements
    • F25B31/002—Lubrication
    • F25B31/004—Lubrication oil recirculating arrangements

Definitions

  • the present invention relates to a device for collecting and returning lubricant, in particular oil, and refrigerant into the refrigerant circuit of a refrigeration system, with a collecting container, an inlet for refrigerant and lubricant and a suction line extending through the collecting container, which is above the usual one Liquid level lying open end for inflowing gaseous refrigerant, a suction area for refrigerant and lubricant and an outlet leading from the collecting container for a mixture of refrigerant and lubricant.
  • Such a device is often also referred to as a collector or accumulator and is used in particular for returning oil to the refrigerant circuit, the oil in turn serving as a lubricant.
  • oils and refrigerants used for lubrication have been used in the known refrigerant systems, in which the oil always has a higher density than the liquefied refrigerant. Due to the higher density of the oil, it has settled in the collecting container and could be sucked out from there - regardless of the amount of oil present - from the lowest area of the collecting container. Even when the oil level is very low, it can be extracted sufficiently, so that reliable oil extraction is largely guaranteed regardless of the operating state of the refrigeration system. The oil can always be fed to the compressor.
  • the present invention is based on the object of designing and developing a device of the generic type in such a way that one for Lubrication required oil return in the refrigerant circuit to the compressor is guaranteed, regardless of the operating condition of the system.
  • a generic device is characterized in that the oil has a lower density than the liquid refrigerant and that the collecting container, in particular the inlet and / or the suction area of the suction line is designed and arranged such that the in the Oil and possibly refrigerant can be drawn in from the collecting container and fed to the refrigerant circuit.
  • An oil return is achieved in the manner according to the invention even if the oil has a lower density than the liquid refrigerant, namely in that the inlet and / or the suction area of the suction line is or are particularly designed and arranged, namely in such a way that either Adequate suction of oil and possibly refrigerant takes place, or a mixture of oil and refrigerant takes place before the actual suction, so that the sucked-in fluid always carries sufficient oil with it for the purpose of lubrication.
  • the suction power could extend vertically through the collecting container, at least in some areas, with suction openings at least over part of its length.
  • the suction openings could also be formed in regions - individually and / or in groups. It is also conceivable that suction openings are provided essentially over the entire length of the suction line.
  • oil and / or liquid refrigerant can be or are removed at different levels in the collecting container, regardless of the specific location of the oil. Because of the suction openings, which are preferably arranged one below the other, sufficient oil is always sucked in, specifically precisely where oil is present, regardless of the specific density of the oil in relation to the density of the refrigerant.
  • suction openings extend over the entire height of the collecting container, oil is always sucked in if there is any oil in the collecting container.
  • the specific fill level in the collection container is irrelevant. Gaseous refrigerant is sucked off via the suction openings arranged above the liquid level, as via the open end of the suction line, this being unproblematic with regard to the other suctioning off of the fluid.
  • the inlet could be above the liquid level, ie in the upper region of the collecting container, so that the fluid can flow freely into the collecting container. From there, gaseous refrigerant enters the suction line directly via the open end above the liquid level and can be discharged from there - to a small extent.
  • the inlet for oil and refrigerant could be formed in the lower region of the collecting container, the suction line having at least one suction opening near the inlet. In the lower area of the suction line - near the inlet - several suction openings can also be formed in order to be able to extract sufficient amounts of oil.
  • the inlet is formed in the bottom region of the collecting container, it having to be ensured that sufficient swirling and thus mixing of oil and refrigerant takes place due to the inflowing fluid. Only then is it possible to extract or suck in a sufficient amount of oil for lubrication purposes.
  • the fluidization or mixing of the fluid required here can be achieved in that the inlet opens essentially tangentially into the collecting container, whereby a mixing of the fluid is promoted.
  • the introduction of oil and refrigerant below the liquid level leads to the fact that the fluid in the collection container and the inflowing fluid mix and thus there is a thorough mixing of oil and refrigerant.
  • two or more inlets could be provided, which are aligned and arranged with respect to one another in such a way that the inflowing fluid mixes - again - preferably by swirling.
  • the inlets could be directed towards one another at a predetermined angle, so that an additional swirl effect occurs.
  • the inlet is followed by a guide device which influences the flow, in particular swirls or mixes the liquid.
  • Guide elements of the guide device are preferably assigned to the inner wall of the collecting container, but could also - alternatively or additionally - be assigned to the outer wall of the suction line.
  • the inlet is also provided in the lower region of the collecting container, a perforated plate, a sieve, a aerator or the like being arranged above the inlet and below the suction opening or the suction openings. This measure also mixes the oil and the refrigerant so that the resulting mixture reaches the suction line via the suction opening.
  • the suction line extends essentially over the entire height of the collecting container and could be curved, convoluted, bent, spiral-shaped or shaped in some other way. It must be ensured that the suction line extends through all those areas of the collecting container in which oil can be stored, taking into account the respective density relationships between oil and refrigerant.
  • the suction line could extend from its open end to its outlet with an essentially U-shaped course, the outlet preferably being designed in the upper region of the collecting container such that the suction line extends from there through the housing wall of the collecting container extends outwards.
  • the open end of the suction line within the collecting container and the outlet could be approximately at the same height.
  • FIG. 1 shows a first exemplary embodiment of a device according to the invention, the suction line having a plurality of suction openings over a vertical region,
  • Fig. 2 shows a further embodiment of a device according to the invention, the inlet being arranged in the lower region of the collecting container and a aerator being provided above it
  • FIG. 1 A third embodiment of a device according to the invention, in which the inlet opens tangentially into the lower region of the collecting container and wherein a guide device is provided for swirling the fluid.
  • FIGS. 1, 2 and 3 show a total of three exemplary embodiments of a device according to the invention for collecting and returning oil 1 and refrigerant 2 into the refrigerant circuit 3 of a refrigeration system, not shown in the figures, the device comprising a collecting container 4.
  • the collecting container 4 is assigned an inlet 5 for refrigerant and oil 1.
  • a suction area 10 for refrigerant 2 and oil 1 is provided, which serves to suck in oil 1 and refrigerant 2 into the suction line 6.
  • An outlet 11 leads out of the collecting container 4 and directs the mixture of refrigerant 2 and oil 1 back into the refrigerant circuit 3.
  • constructive measures are provided which are based on the fact that the oil 1 has a lower density than the liquid refrigerant 2 or that there are only insignificant differences in density between the oil 1 and the refrigerant 2.
  • it is important that sufficient oil is always returned and that lubrication is ensured.
  • the suction line 6 extends substantially vertically through the collecting container 4 and is U-shaped. Numerous suction openings 12 are arranged one above the other along one leg of the suction line 6, so that regardless of the liquid level 7 inside the collecting container 4, suction is carried out wherever oil 1 - regardless of its specific density - can be located. Gaseous refrigerant 9 is sucked in via the suction openings 12, which are above the liquid level 7, which is not a problem in this respect.
  • the embodiment shown in Fig. 1 has the advantage that a sufficient amount of oil 1 is always sucked out through the suction openings 12, regardless of the ratio of oil 1 and refrigerant 2 and regardless of the specific arrangement of the oil 1 or regardless of the liquid level 7th
  • Fig. 2 shows a further embodiment of a device according to the invention, wherein the inlet 5 is formed in the lower region of the collecting container 4, namely in the concrete in the bottom region.
  • a perlator 13 is arranged above the inlet 5, which is simply a perforated plate.
  • the aerator 13 swirls and thus mixes oil 1 and refrigerant 2, so that a mixture of oil 1 and refrigerant 2 can be sucked into the suction line 6 via the suction opening 12 provided there singularly.
  • the oil in the reservoir 4 is mixed with the refrigerant through the provision of the aerator 13 and is sucked off with refrigerant 2.
  • FIG. 3 shows a further variant of the device according to the invention, the inlet 5 also being arranged there in the lower region of the collecting container 4.
  • This arrangement causes swirling of oil 1 and refrigerant 2, so that mixing takes place.
  • the inlet 5 is oriented tangentially, so that the resulting flow mixes oil 1 and refrigerant 2 favored.
  • a guide device 14 is provided there, which is only shown symbolically.
  • the guide device 14 comprises individual guide elements 15, which again promote the swirling of oil 1 and refrigerant 2.
  • the mixture of oil 1 and refrigerant 2 passes through the suction opening 12 into the suction line 6 and from there through the outlet 11 back into the refrigerant circuit 3.
  • the device according to the invention is particularly suitable for use in a refrigeration system with an internal heat exchanger downstream of the device or the collector.
  • the internal heat exchanger can evaporate the liquid refrigerant flowing out of the claimed device and thus prevent liquid refrigerant from being sucked in by the compressor.
  • a lower inlet temperature into the compressor can be achieved.
  • a low compression end temperature is also of advantage for the thermal stability of lubricant, elastomers and metals, such as aluminum.

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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)
  • Compressor (AREA)

Abstract

L'invention concerne un dispositif servant à collecter et à remettre en circulation un lubrifiant, à savoir de l'huile (1), et un réfrigérant (2) dans le circuit de réfrigérant (3) d'une installation frigorifique. Ce dispositif comprend un collecteur (4), un orifice d'admission (5), par lequel passent le réfrigérant (2) et l'huile (1), et une conduite d'aspiration (6) qui s'étend à travers le collecteur (4) et comporte une extrémité (8) ouverte située au-dessus du niveau de liquide (7) normal et sert à l'entrée de réfrigérant (9) gazeux, une zone d'aspiration (10) pour le réfrigérant (2) et l'huile (1), et un orifice de sortie (11) qui conduit à l'extérieur du collecteur (4) et par lequel passe un mélange de réfrigérant (2) et d'huile (1). Ce dispositif se caractérise par le fait que l'huile (1) présente une densité égale ou inférieure à celle du réfrigérant (2) liquide et que le collecteur (4), en particulier l'orifice d'admission (5) et/ou la zone d'aspiration (10) de la conduite d'aspiration (6) sont conçus et disposés de telle sorte qu'au-dessus de la zone d'aspiration (10), l'huile (1) et éventuellement le réfrigérant (2) se trouvant dans le collecteur (4) peuvent être, quel que soit l'état de fonctionnement de l'installation frigorifique, aspiré pour être ramené dans le circuit de réfrigérant (3).
PCT/DE2001/002498 2000-07-27 2001-07-05 Dispositif servant a collecter et a remettre en circulation un lubrifiant et un refrigerant dans le circuit de refrigerant d'une installation frigorifique WO2002010656A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001277473A AU2001277473A1 (en) 2000-07-27 2001-07-05 Device for collecting and returning lubricants and coolants to the coolant circuit of a cooling system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE20022422U DE20022422U1 (de) 2000-07-27 2000-07-27 Vorrichtung zum Sammeln und Rückführen von Schmierstoff und Kältemittel in den Kältemittelkreislauf einer Kälteanlage
DE20022422.0 2000-07-27

Publications (1)

Publication Number Publication Date
WO2002010656A1 true WO2002010656A1 (fr) 2002-02-07

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2001/002498 WO2002010656A1 (fr) 2000-07-27 2001-07-05 Dispositif servant a collecter et a remettre en circulation un lubrifiant et un refrigerant dans le circuit de refrigerant d'une installation frigorifique

Country Status (2)

Country Link
AU (1) AU2001277473A1 (fr)
WO (1) WO2002010656A1 (fr)

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB352528A (en) * 1930-04-07 1931-07-07 Lightfoot Refrigeration Compan Improvements in or relating to evaporator coils for refrigerating apparatus
US1899378A (en) * 1926-10-20 1933-02-28 Servel Inc Method of and apparatus for separating a liquid from other liquids
US3796064A (en) * 1972-11-20 1974-03-12 Gen Electric Suction accumulator
US4147479A (en) * 1976-08-13 1979-04-03 Tecumseh Products Company Refrigeration system and method with compressor mounted accumulator
US4665716A (en) * 1984-09-21 1987-05-19 Robert Cochran Fluid flow control system
JPH04110575A (ja) * 1990-08-30 1992-04-13 Toshiba Corp アキュムレータ
JPH0593558A (ja) * 1991-10-01 1993-04-16 Matsushita Electric Ind Co Ltd アキユムレータ
US5347817A (en) * 1992-07-22 1994-09-20 Samsung Electronics Co., Ltd. Accumulator construction of cooling heating dual-purpose air conditioner
DE19502996A1 (de) * 1994-04-19 1995-10-26 Daewoo Electronics Co Ltd Speicher für einen Kühlschrank
EP0803688A1 (fr) * 1996-04-26 1997-10-29 Mitsubishi Denki Kabushiki Kaisha Bouteille tampon
EP0841487A2 (fr) * 1996-11-06 1998-05-13 Mitsubishi Denki Kabushiki Kaisha Accumulateur
JPH10160293A (ja) * 1996-11-29 1998-06-19 Sanyo Electric Co Ltd 冷凍装置及びアキュームレータ

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1899378A (en) * 1926-10-20 1933-02-28 Servel Inc Method of and apparatus for separating a liquid from other liquids
GB352528A (en) * 1930-04-07 1931-07-07 Lightfoot Refrigeration Compan Improvements in or relating to evaporator coils for refrigerating apparatus
US3796064A (en) * 1972-11-20 1974-03-12 Gen Electric Suction accumulator
US4147479A (en) * 1976-08-13 1979-04-03 Tecumseh Products Company Refrigeration system and method with compressor mounted accumulator
US4665716A (en) * 1984-09-21 1987-05-19 Robert Cochran Fluid flow control system
JPH04110575A (ja) * 1990-08-30 1992-04-13 Toshiba Corp アキュムレータ
JPH0593558A (ja) * 1991-10-01 1993-04-16 Matsushita Electric Ind Co Ltd アキユムレータ
US5347817A (en) * 1992-07-22 1994-09-20 Samsung Electronics Co., Ltd. Accumulator construction of cooling heating dual-purpose air conditioner
DE19502996A1 (de) * 1994-04-19 1995-10-26 Daewoo Electronics Co Ltd Speicher für einen Kühlschrank
EP0803688A1 (fr) * 1996-04-26 1997-10-29 Mitsubishi Denki Kabushiki Kaisha Bouteille tampon
EP0841487A2 (fr) * 1996-11-06 1998-05-13 Mitsubishi Denki Kabushiki Kaisha Accumulateur
JPH10160293A (ja) * 1996-11-29 1998-06-19 Sanyo Electric Co Ltd 冷凍装置及びアキュームレータ

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 016, no. 353 (M - 1288) 30 July 1992 (1992-07-30) *
PATENT ABSTRACTS OF JAPAN vol. 017, no. 433 (M - 1461) 11 August 1993 (1993-08-11) *
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 11 30 September 1998 (1998-09-30) *

Also Published As

Publication number Publication date
AU2001277473A1 (en) 2002-02-13

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