US3874192A - Oil cooling apparatus for refrigerators - Google Patents

Oil cooling apparatus for refrigerators Download PDF

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Publication number
US3874192A
US3874192A US446005A US44600574A US3874192A US 3874192 A US3874192 A US 3874192A US 446005 A US446005 A US 446005A US 44600574 A US44600574 A US 44600574A US 3874192 A US3874192 A US 3874192A
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US
United States
Prior art keywords
oil
refrigerator
cooling apparatus
conduit
oil cooling
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.)
Expired - Lifetime
Application number
US446005A
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English (en)
Inventor
Eiji Kato
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.)
Mayekawa Manufacturing Co
Original Assignee
Mayekawa Manufacturing Co
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 Mayekawa Manufacturing Co filed Critical Mayekawa Manufacturing Co
Application granted granted Critical
Publication of US3874192A publication Critical patent/US3874192A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/06—Cooling; Heating; Prevention of freezing
    • F04B39/062—Cooling by injecting a liquid in the gas to be compressed
    • 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 present invention relates to an oil cooling apparatus for a refrigerator such as a screw type refrigerator in which a large quantity of oil is required for the operation.
  • an important object of the invention is to provide an improved oil cooling apparatus for the refrigerator in which the disadvantages of the conventional oil coolers such as above mentioned have been eliminated.
  • FIG. 1 is a circuit diagram of an oil cooling apparatus according to the invention.
  • FIG. 2 is an enlarged sectional view of a liquid atomizer section of the apparatus shown in FIG. 1.
  • a screw type refrigerator 1 has an exhaust outlet or opening 5 from which an exhaust gas conduit 3 extends to an oil separator 2, which in turn is communicated with a condenser 7 through another gas conduit 6.
  • the condenser 7 on the other hand is connected to a liquid receptacle or container 9 through a liquid conduit 8.
  • the receptacle 9 has another liquid conduit 10 outgoing therefrom and connected to an evaporator 12 through an expansion valve 11.
  • the screw refrigerator 1 has a suction inlet 14 to which a gas suction conduit 13 extending from the evaporator 12 is connected.
  • a high pressure liquid conduit 4 which is led from the liquid receptacle 9 is connected to a liquid atomizing port 15 provided within the exhaust gas conduit 3.
  • the high pressure liquid conduit 4 may be led from the condenser 7.
  • the liquid atomization within the gas conduit 3 may be effected by utilizing the potential energy between the condenser 7 or receptacle 9 and the atomizing port 15 with the former positioned at a higher level than that of the latter.
  • an ejector 16 may be arranged within the exhaust gas conduit 3 and connected to the high pressure liquid conduit 4.
  • an electromagnetic valve 17 is provided in the high pressure liquid conduit 4 and opened or closed in synchronization with start or stop, respectively, of the operation of an electric motor 18 for driving the refrigerator 1.
  • an oil conduit 20 from an oil sump 19 of the oil separator 2 is connected to oil injection orifices 25 and other lubricating portions 24, 26 of the screw refrigerator 1 by way of filters 21, 22 and an oil pump 23.
  • gas discharged from the exhaust outlet 5 of the screw refrigerator 1 at. a high temperature and pressure as mixed with oil in a mist form is cooled by evaporating latent heat of the liquid coolant derived from the receptacle 9 and atomized by the atomizing port l5 within the exhaust gas conduit 3, whereby oil component is cooled to the temperature of about 45C, while gas component is cooled to a temperature in the vicinity of the condensation temperature of the condenser 7, that is 30C to 35C.
  • the cooled mixture of gas and oil is then introduced into the oil separator 2 in which gas is separated from oil.
  • the gas from the separator 2 is then liquidized by the condenser 7 and collected at the receptacle 9.
  • the gas condensation or liquid from the receptacle 9 is supplied to the expansion valve 11 through the liquid conduit 10 and, after having been expanded into gas at a low pressure, is introduced into an evaporator 12 where heat exchange takes place between the gas and heat load. Finally, the low pressure gas is sucked into the suction inlet 14 of the screw refrigerator 1 through the suction conduit 13. This process is repeated. Oil from the oil separator 2 is supplied to lubricating portions of the screw refrigerator 1 through the oil sump 19' and the oil conduit 20 and used for lubrication of bearings, cooling of gas and the sealing purpose.
  • the high pressure liquid conduit 4 is provided in the exhaust gas conduit 3 connecting the refrigerator 1 and the oil separator 2 to each other.
  • coolant atomized in the exhaust gas conduit 3 is easily evaporated by the high temperature exhaust gas, whereby the exhaust gas as well as oil mixed therewith in a form of mist are cooled by latent heat upon the evaporation.
  • gas supplied to the condenser 7 can be previously cooled, while oil component can be put in the state for easy separation from gas.
  • the apparatus or installations can be made or arranged in a compact form without requiring an additional separator of a large capacity as is in the case of the hitherto known apparatus.
  • a cooler of a water cooling type is not employed, the problem of dirt deposition on cooling water conduits as well as corrosion thereof will not arise.
  • Oil cooling apparatus for a refrigerator comprising a refrigerator, an oil separator, an exhaust gas conduit for connecting said refrigerator and oil separator to each other, an atomization means provided within said conduit, and a liquid coolant supply source connected to said atomization means.
  • liquid coolant supply source comprises a liquid receptacle.
  • Oil cooling apparatus as set forth in claim 1, wherein the oil cooled and separated from the gas in said oil separator is injected into said refrigerator and introduced for lubrication of bearings of said refrigerator without installing any oil cooler.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Power Engineering (AREA)
  • Indicating Or Recording The Presence, Absence, Or Direction Of Movement (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
US446005A 1973-03-08 1974-02-26 Oil cooling apparatus for refrigerators Expired - Lifetime US3874192A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2661073A JPS5425804B2 (enrdf_load_stackoverflow) 1973-03-08 1973-03-08

Publications (1)

Publication Number Publication Date
US3874192A true US3874192A (en) 1975-04-01

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ID=12198255

Family Applications (1)

Application Number Title Priority Date Filing Date
US446005A Expired - Lifetime US3874192A (en) 1973-03-08 1974-02-26 Oil cooling apparatus for refrigerators

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US (1) US3874192A (enrdf_load_stackoverflow)
JP (1) JPS5425804B2 (enrdf_load_stackoverflow)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4254637A (en) * 1979-10-19 1981-03-10 Vilter Manufacturing Corporation Refrigeration system with refrigerant cooling of compressor and its oil
US4275570A (en) * 1980-06-16 1981-06-30 Vilter Manufacturing Corporation Oil cooling means for refrigeration screw compressor
US5168721A (en) * 1991-03-28 1992-12-08 K-Whit Tools, Inc. Refrigerant recovery device
US5222369A (en) * 1991-12-31 1993-06-29 K-Whit Tools, Inc. Refrigerant recovery device with vacuum operated check valve
US5317903A (en) * 1991-12-19 1994-06-07 K-Whit Tools, Inc. Refrigerant charging system controlled by charging pressure change rate
US5461883A (en) * 1993-01-26 1995-10-31 Hitachi, Ltd. Compression refrigerating machine
US5758506A (en) * 1996-07-03 1998-06-02 White Industries, Llc Method and apparatus for servicing automotive refrigeration systems
CN105627614A (zh) * 2016-01-25 2016-06-01 珠海格力电器股份有限公司 制冷机组及其控制方法和控制系统
US20230151744A1 (en) * 2020-07-16 2023-05-18 SPH Sustainable Process Heat GmbH Temperature management system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US320305A (en) * 1885-06-16 suckeet
US2684579A (en) * 1951-06-04 1954-07-27 Hieatt Engineering Co Apparatus for cooling oil of refrigerant compressors
US3270521A (en) * 1965-09-08 1966-09-06 Worthington Corp Refrigerant cooled oil cooler system
US3710590A (en) * 1971-07-19 1973-01-16 Vilter Manufacturing Corp Refrigerant cooled oil system for a rotary screw compressor
US3811291A (en) * 1971-12-28 1974-05-21 Svenska Rotor Maskiner Ab Method of operating a refrigeration plant and a plant for performing the method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US320305A (en) * 1885-06-16 suckeet
US2684579A (en) * 1951-06-04 1954-07-27 Hieatt Engineering Co Apparatus for cooling oil of refrigerant compressors
US3270521A (en) * 1965-09-08 1966-09-06 Worthington Corp Refrigerant cooled oil cooler system
US3710590A (en) * 1971-07-19 1973-01-16 Vilter Manufacturing Corp Refrigerant cooled oil system for a rotary screw compressor
US3811291A (en) * 1971-12-28 1974-05-21 Svenska Rotor Maskiner Ab Method of operating a refrigeration plant and a plant for performing the method

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4254637A (en) * 1979-10-19 1981-03-10 Vilter Manufacturing Corporation Refrigeration system with refrigerant cooling of compressor and its oil
US4275570A (en) * 1980-06-16 1981-06-30 Vilter Manufacturing Corporation Oil cooling means for refrigeration screw compressor
US5168721A (en) * 1991-03-28 1992-12-08 K-Whit Tools, Inc. Refrigerant recovery device
US5335512A (en) * 1991-03-28 1994-08-09 K-Whit Tools, Inc. Refrigerant recovery device
US5317903A (en) * 1991-12-19 1994-06-07 K-Whit Tools, Inc. Refrigerant charging system controlled by charging pressure change rate
US5222369A (en) * 1991-12-31 1993-06-29 K-Whit Tools, Inc. Refrigerant recovery device with vacuum operated check valve
US5461883A (en) * 1993-01-26 1995-10-31 Hitachi, Ltd. Compression refrigerating machine
US5758506A (en) * 1996-07-03 1998-06-02 White Industries, Llc Method and apparatus for servicing automotive refrigeration systems
CN105627614A (zh) * 2016-01-25 2016-06-01 珠海格力电器股份有限公司 制冷机组及其控制方法和控制系统
CN105627614B (zh) * 2016-01-25 2018-01-09 珠海格力电器股份有限公司 制冷机组及其控制方法和控制系统
US20230151744A1 (en) * 2020-07-16 2023-05-18 SPH Sustainable Process Heat GmbH Temperature management system

Also Published As

Publication number Publication date
JPS49115515A (enrdf_load_stackoverflow) 1974-11-05
JPS5425804B2 (enrdf_load_stackoverflow) 1979-08-30

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