EP0498317A1 - Procédé d'opération d'un système de réfrigération - Google Patents

Procédé d'opération d'un système de réfrigération Download PDF

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Publication number
EP0498317A1
EP0498317A1 EP92101651A EP92101651A EP0498317A1 EP 0498317 A1 EP0498317 A1 EP 0498317A1 EP 92101651 A EP92101651 A EP 92101651A EP 92101651 A EP92101651 A EP 92101651A EP 0498317 A1 EP0498317 A1 EP 0498317A1
Authority
EP
European Patent Office
Prior art keywords
oil
refrigerant
compressor
auxiliary
returned
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.)
Withdrawn
Application number
EP92101651A
Other languages
German (de)
English (en)
Inventor
Klaus Mall
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.)
Linde GmbH
Original Assignee
Linde GmbH
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 Linde GmbH filed Critical Linde GmbH
Publication of EP0498317A1 publication Critical patent/EP0498317A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • 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
    • F25B43/02—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for separating lubricants from the refrigerant

Definitions

  • the invention relates to a method for operating a refrigeration system, in which a refrigerant is conveyed through an refrigerant circuit by means of an oil-lubricated compressor, oil coming from the compressor into the refrigerant circuit, and in which an additive which is insoluble in it but is soluble in the oil is added to the refrigerant .
  • Synthetic oils such as polyol esters and polyalkylene glycols have therefore been developed that dissolve to a limited extent in the chlorine-free refrigerants.
  • these new oils have considerable disadvantages. They work e.g. aggressive to certain materials within the refrigerant circuit, for example electrical insulation and sealing materials, and have strong hygroscopic properties. In addition, they tend to copper plating and have insufficient thermal stability.
  • the addition of oil-dissolving additives is intended to prevent the lubricating oil from stagnating or the removal of paraffin in parts of the refrigeration system.
  • solvents are introduced into the refrigeration cycle at various points in the refrigeration system.
  • the diluted oil then settles at various oil collection points and can be removed from the extraction points.
  • the solvent is added abundantly so that a certain part gets into the evaporator to dissolve the sticked paraffin hanging on the walls.
  • the aim is to dilute the lubricating oil by adding a solvent and to guide the diluted lubricating oil in the refrigerant circuit via the compressor or to discharge it from the circuit.
  • lubricating oil and solvent are passed through the evaporator, which affects the economic efficiency and operational safety of the refrigeration system.
  • the present invention has for its object to design a method of the type mentioned so that even when using oil-insoluble refrigerant, a large return of the oil to the compressor is achieved in an economical manner, without adversely affecting the economy and reliability of the refrigeration system.
  • the invention is particularly intended for use with chlorine-free refrigerants or other refrigerants that are not soluble with conventional oils.
  • these refrigerants are soluble in the auxiliary, extensive de-oiling of the refrigerant is possible.
  • a short chain hydrocarbon e.g. Butane, propane or pentane.
  • Conventional refrigeration oils of mineral origin and synthetic oils based on hydrocarbons are soluble in these hydrocarbons in all proportions.
  • the addition of small amounts of auxiliary substance is sufficient to achieve a constant washing out of the oil within the refrigerant circuit.
  • the oil can be easily recovered with an oil ejector, as described in DE-PS 22 52 583, and can be returned to any point in the refrigerant circuit, in particular to the engine of the compressor.
  • the two phases namely the essentially oil-free refrigerant on the one hand and the oil-auxiliary solution on the other hand, are separated by means of a floating process (similar to gasoline separator DIN 1999).
  • a collection bottle is used, which in the Refrigerant circuit is switched on.
  • the oil-auxiliary solution usually has a lower specific weight than the refrigerant, so that an oil-auxiliary phase floating on top and a pure refrigerant phase underneath arise in the collecting bottle.
  • the oil auxiliary phase is drawn off at the top and supplied to an oil ejector as described in DE-PS 22 52 583. In the oil ejector, the oil is expelled from the oil-auxiliary solution and then returned to the compressor.
  • the phases are separated on the high pressure side of the refrigeration system. In this way, a migration of oil to the evaporator side of the refrigeration system is largely avoided, so that the evaporator can be operated with practically pure refrigerant.
  • the method according to the application is not simply a dilution of the lubricating oil, but rather a washing-out process in which the oil on the high-pressure side of the refrigeration system is constantly washed out of the refrigerant and returned to the compressor.
  • the auxiliary agent acting as a detergent remains on the high-pressure side of the refrigeration system.
  • the two phases of refrigerant and oil auxiliary solution are separated from each other in the collecting bottle by floating, i.e. the specifically lighter phase floats on top of the specifically heavier phase.
  • the oil auxiliary solution is expediently fed to the oil expeller via a connecting line and a check valve.
  • the oil ejector it is used as a detergent serving auxiliary evaporates and is returned as gas via the connecting line to the collecting bottle.
  • the auxiliary substance constantly moves back and forth on the high-pressure side between the condenser and the oil expeller, washing the oil out of the refrigerant. The washed-out oil is separated from the auxiliary in the oil expeller and returned to the compressor.
  • the invention is explained in more detail below on the basis of an exemplary embodiment shown schematically in the drawing:
  • the figure shows a flow diagram of a refrigeration system with an oil washing device.
  • the diagram shows a conventional refrigerant circuit, consisting of a refrigerant compressor 1 with a downstream oil separator 2, a condenser 4 with a collecting bottle 5, an expansion device 6 for the refrigerant and a refrigerant evaporator 7.
  • a conventional refrigerant circuit an oil expeller is attached to the collecting bottle 5 3 connected, as described in DE-PS 22 52 583.
  • the butane-oil mixture has a lower specific weight than the refrigerant and therefore floats on top of the collecting bottle 5 (12). From there, the butane-oil mixture is removed by means of a sampling tube 10 and fed to the oil ejector 3 by means of the connecting line 9 via the sight glass 8 and a check valve 30. In the oil ejector 3, which is heated with hot refrigerant compressed gas, the auxiliary substance serving as a detergent is evaporated.
  • the check valve 30 has a check valve with at least one bore opening against a bias in the gas flow direction. When the non-return valve is opened, the auxiliary substance evaporated in the oil expeller flows back unhindered at a constant speed through the connecting line 9 to the collecting bottle 5.
  • the hole in the check valve remains liquid butane-oil mixture, adapted to the heating output, metered again to the oil ejector 3.
  • the auxiliary substance therefore constantly moves back and forth on the high-pressure side between the condenser 4 and the oil ejector 3, washing the oil out of the refrigerant in the process.
  • the washed-out oil is separated from the auxiliary material in the oil ejector 3 and returned directly to the engine of the compressor 1 via line 11.
  • the pure refrigerant phase 13 located at the bottom of the collecting bottle 5 is drawn off via line 14 and returned to the compressor 1 via the expansion device 6 and the evaporator 7.

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)
  • Lubricants (AREA)
EP92101651A 1991-02-05 1992-01-31 Procédé d'opération d'un système de réfrigération Withdrawn EP0498317A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19914103406 DE4103406A1 (de) 1991-02-05 1991-02-05 Verfahren zum betreiben einer kaelteanlage
DE4103406 1991-02-05

Publications (1)

Publication Number Publication Date
EP0498317A1 true EP0498317A1 (fr) 1992-08-12

Family

ID=6424401

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92101651A Withdrawn EP0498317A1 (fr) 1991-02-05 1992-01-31 Procédé d'opération d'un système de réfrigération

Country Status (2)

Country Link
EP (1) EP0498317A1 (fr)
DE (1) DE4103406A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994017348A1 (fr) * 1993-01-29 1994-08-04 Aka Industriprodukter Kyla Ab Procede et appareil de purge d'huile des machines frigorifiques et des thermopompes
EP0743496A3 (fr) * 1992-11-30 1997-02-05 Mitsubishi Electric Corp Système frigorifique utilisant du frigorigène hydrocarbure fluoré
EP0846925A3 (fr) * 1993-04-27 1999-12-15 Mitsubishi Denki Kabushiki Kaisha Système de circulation de frigorigène
WO2003042102A1 (fr) * 2001-11-15 2003-05-22 Bernard Zimmern Procede de production d'ammoniac comprime quasiment sans huile et systeme de mise en oeuvre de celui-ci
US10119734B2 (en) 2004-11-05 2018-11-06 Arcelik Anonim Sirketi Cooling device with compressor cabinet heater and a control method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3274796A (en) * 1965-09-23 1966-09-27 Vilter Manufacturing Corp Refrigeration system with lube oil separation means
CH437382A (de) * 1964-01-08 1967-06-15 Linde Ag Vorrichtung zur Abtrennung von im Kältemittel einer Kompressions-Kältemaschine angereichertem Öl
DE2252583B1 (de) * 1972-10-26 1974-04-18 Linde Ag, 6200 Wiesbaden Vorrichtung zum Aufkonzentrieren von Öl in einem Öl-Kältemittel-Gemisch
DE3245475A1 (de) * 1981-12-18 1983-07-07 Stal Refrigeration AB, 60187 Norrköping Verfahren zur rezirkulation von oel in einer kuehlanlage

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1073509B (de) * 1960-01-21 Gesellschaft für Linde's Eismaschinen Aktiengesellschaft, Wiesbaden Verfahren und Anordnung zur Entölung von Kälteanlagen
DE834854C (de) * 1943-04-13 1952-03-24 Linde Eismasch Ag Verfahren zur Entoelung von Kaelteanlagen
FR2101577A5 (fr) * 1970-07-13 1972-03-31 Gulf & Western Industries

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH437382A (de) * 1964-01-08 1967-06-15 Linde Ag Vorrichtung zur Abtrennung von im Kältemittel einer Kompressions-Kältemaschine angereichertem Öl
US3274796A (en) * 1965-09-23 1966-09-27 Vilter Manufacturing Corp Refrigeration system with lube oil separation means
DE2252583B1 (de) * 1972-10-26 1974-04-18 Linde Ag, 6200 Wiesbaden Vorrichtung zum Aufkonzentrieren von Öl in einem Öl-Kältemittel-Gemisch
DE3245475A1 (de) * 1981-12-18 1983-07-07 Stal Refrigeration AB, 60187 Norrköping Verfahren zur rezirkulation von oel in einer kuehlanlage

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0743496A3 (fr) * 1992-11-30 1997-02-05 Mitsubishi Electric Corp Système frigorifique utilisant du frigorigène hydrocarbure fluoré
EP0738859A3 (fr) * 1992-11-30 1997-02-05 Mitsubishi Electric Corp Système frigorifique utilisant du frigorigène hydrocarbure fluoré
EP0738858A3 (fr) * 1992-11-30 1997-02-05 Mitsubishi Electric Corp Procédé d'assemblage d'un système frigorifique utilisant du frigorigène hydrocarbure fluoré
EP0600131B1 (fr) * 1992-11-30 1997-03-05 Mitsubishi Denki Kabushiki Kaisha Dispositif frigorifique utilisant du frigorigène hydrocarbure fluoré
WO1994017348A1 (fr) * 1993-01-29 1994-08-04 Aka Industriprodukter Kyla Ab Procede et appareil de purge d'huile des machines frigorifiques et des thermopompes
EP0846925A3 (fr) * 1993-04-27 1999-12-15 Mitsubishi Denki Kabushiki Kaisha Système de circulation de frigorigène
EP0846751A3 (fr) * 1993-04-27 1999-12-22 Mitsubishi Denki Kabushiki Kaisha Système de circulation de frigorigène
WO2003042102A1 (fr) * 2001-11-15 2003-05-22 Bernard Zimmern Procede de production d'ammoniac comprime quasiment sans huile et systeme de mise en oeuvre de celui-ci
US10119734B2 (en) 2004-11-05 2018-11-06 Arcelik Anonim Sirketi Cooling device with compressor cabinet heater and a control method

Also Published As

Publication number Publication date
DE4103406A1 (de) 1992-08-13

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