US2663164A - Parallel compressor arrangement in refrigerating system - Google Patents
Parallel compressor arrangement in refrigerating system Download PDFInfo
- Publication number
- US2663164A US2663164A US254540A US25454051A US2663164A US 2663164 A US2663164 A US 2663164A US 254540 A US254540 A US 254540A US 25454051 A US25454051 A US 25454051A US 2663164 A US2663164 A US 2663164A
- Authority
- US
- United States
- Prior art keywords
- compressor
- compressors
- oil
- sump
- refrigerating system
- 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
Links
Images
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
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S417/00—Pumps
- Y10S417/902—Hermetically sealed motor pump unit
Definitions
- - 1 -My invention relates to refrigerating apparatus and pertains more particularly to the regulation of oil levels in compressors connected in parallel in a refrigerating system.
- a primary object of myinventlon is to provide means efiective for maintaining satisfactory oil levels in th sumps of compressors operated in parallel, regardless of whether the compressors are disposed at the same or different heights.
- Another object of my invention is to provide with two compressors operating in parallel a single means effective for both equalizing the pressures therein and maintaining satisfactory oil levels in the sumps of the compressors.
- I provide a pair of compressors connected to a common exhaust line, and with one also connected to the suction line of the refrigerating system.
- I provide further a transfer tube, one end of which extends into and to a normal oil level in the compressor connected to the suction line and the other end of which is connected to the other compressor above the normal oil level therein.
- FIG. 1 is a schematic showing of a refrigerating system including two compressors operated in parallel; and Fig. 2 is an enlarged detailed sectional view illustrating an embodiment of my invention.
- a refrigerating system including a refrigerating unit generally designated l and comprising a first compressor 2 and a second compressor 3, commonly connected by an exhaust line 4 to a condenser 5.
- a capillary tube 6 con- 2 Cl aims. (01. 62-11737) nects the condenser with an evaporator l; and a suction line 8 connects the evaporator with the first compressor 2. This system is charged with an amount of oil suificient for supplying both compressors.
- the first compressor 2 includes anvoil sump 9 in its bottom portion, an outlet passage to and an inlet passage ll disposed above the sump.
- the second compressor 3 includes an oil sump [2 in its bottom portion, an outlet passage [3 and an inlet passage connected to the suction line 8.
- a transfer tube 15 Provided between the two compressors is a transfer tube 15, one end of which is connected to th inlet is of the second compressor 3 and the other end of which extends into the first compressor 2 and to the normal oil level in the sump 9 thereof.
- the extending end of the tube is cut obliquely, as at l6, to provide a maximum opening at the normal oil level.
- the first compressor 2 initially receives, from the suction line 8 and through the inlet passage ll, all of the oil and vaporized refrigerant from the system.
- the transfer tube 15 provides for equalization of vapor pressures between the first and second compressors in order that both compressors may operate to deliver the refrigerant through the exhaust line 4 and to the condenser 5.
- the oil collects in the sump 9 of the first compressor 2 until it reaches its normal level. Oilin excess of the normal level in the sump 9 is swept up through the transfer tube l5 by the vaporous refrigerant being drawn into the second compressor 3 and is thereby transferred to the second compressor, wherein it collects in the sump l2 thereof.
- satisfactory oil levels are maintained in. the sumps of both the first and second compressors.
- the second compressor 3 is effective for transferring through the tube !5 all oil in excess of the normal level in the sump 9 of the first compressor. If the second compressor 3 is shut down, the oil will collect in the sump 9 of the first compressor 2 and exceed th normal level therein. However, the first few restarting strokes of the second compressor 3 will be elfective for drawing over through the tube l5 and into the sump [2 thereof a satisfactory amount of the oil.
- a refrigerating system including an exhaust line and a suction line
- said compressors being commonly connected to said exhaust line, only on of said compressors being connected to said suction line and receiving initially all of the oil and vaporized refrigerant from said suction line and a single tube connecting said pair of compressors, one end of said tube extending into said one compressor and to the normal oil level in the sump thereof, the other end'oi said tube being connected to the other compressor above the sump thereof, said tube being effective for both equalizing vapor pressures in said compressors and transferring oil exceeding the normal level in the sump of said one compressor 4 to said other compressor for collection in the sump thereof.
- a refrigerating system including an exhaust line and a suction line
- a first and a second compressor disposed at different heights, each of said compressors including an oil sump, each of said compressors including an outlet passage, and an inlet passage located above its corresponding sump, the outlet passages of said compressors being commonly connected to said exhaust line, the inlet passage of'said first compressor only being connected tosaid suction line whereby said first compressor receives initially all of the oil and vaporized refrigerant from said suction line
- a first and a second compressor disposed at different heights, each of said compressors including an oil sump, each of said compressors including an outlet passage, and an inlet passage located above its corresponding sump, the outlet passages of said compressors being commonly connected to said exhaust line, the inlet passage of'said first compressor only being connected tosaid suction line whereby said first compressor receives initially all of the oil and vaporized refrigerant from said suction line
Description
Dec. 22, 1953 M, KURT 2,663,164
PARALLEL COMPRESSOR ARRANGEMENT IN REF'R-IGERATING SYSTEM F'iled NOV. 2, 1951 Fig I.
Inventor": Lowell M. Kurtz,
His Attorne Patented Dec. 22, i953 PARALLEL COMPRESSOR ARRANGEMENT IN REFRIGERATING SYSTEM Lowell M. Kurtz, Erie, Pa., assignor to General Electric Company, a corporation of ew York Application November 2, 1951, Serial N 0. 254,540
- 1 -My invention relates to refrigerating apparatus and pertains more particularly to the regulation of oil levels in compressors connected in parallel in a refrigerating system.
Ordinarily, when two refrigerator compressors ar operated in parallel, they are. placed at a common height. One connection between the compressors equalizes the vapor pressures therein; and another connection between the compressor sumps equalizes the levels of the oil therein. The need for the compressors to be at thesame height, however, precludes th use of this arrangement in any system wherein it might be desirable for the compressors. to be placed at different heights.
Therefore, a primary object of myinventlon is to provide means efiective for maintaining satisfactory oil levels in th sumps of compressors operated in parallel, regardless of whether the compressors are disposed at the same or different heights.
Another object of my invention is to provide with two compressors operating in parallel a single means effective for both equalizing the pressures therein and maintaining satisfactory oil levels in the sumps of the compressors.
Further objects and advantages of my invention will become apparent as the following description proceeds and the features of novelty which characterize my invention will be pointed out with particularity in the claims annexed to and forming a part of this invention.
In carrying out the objects of my invention I provide a pair of compressors connected to a common exhaust line, and with one also connected to the suction line of the refrigerating system. I provide further a transfer tube, one end of which extends into and to a normal oil level in the compressor connected to the suction line and the other end of which is connected to the other compressor above the normal oil level therein.
For a better understanding of my invention reference may be had to the accompanying drawing in which Fig. 1 is a schematic showing of a refrigerating system including two compressors operated in parallel; and Fig. 2 is an enlarged detailed sectional view illustrating an embodiment of my invention.
Referring to the drawing, I have shown in Fig. l a refrigerating system including a refrigerating unit generally designated l and comprising a first compressor 2 and a second compressor 3, commonly connected by an exhaust line 4 to a condenser 5. A capillary tube 6 con- 2 Claims. (01. 62-11737) nects the condenser with an evaporator l; and a suction line 8 connects the evaporator with the first compressor 2. This system is charged with an amount of oil suificient for supplying both compressors.
As better seen in Fig. 2, the first compressor 2 includes anvoil sump 9 in its bottom portion, an outlet passage to and an inlet passage ll disposed above the sump. The second compressor 3 includes an oil sump [2 in its bottom portion, an outlet passage [3 and an inlet passage connected to the suction line 8. Provided between the two compressors is a transfer tube 15, one end of which is connected to th inlet is of the second compressor 3 and the other end of which extends into the first compressor 2 and to the normal oil level in the sump 9 thereof. The extending end of the tube is cut obliquely, as at l6, to provide a maximum opening at the normal oil level.
In operation the first compressor 2 initially receives, from the suction line 8 and through the inlet passage ll, all of the oil and vaporized refrigerant from the system. The transfer tube 15 provides for equalization of vapor pressures between the first and second compressors in order that both compressors may operate to deliver the refrigerant through the exhaust line 4 and to the condenser 5. The oil, however, collects in the sump 9 of the first compressor 2 until it reaches its normal level. Oilin excess of the normal level in the sump 9 is swept up through the transfer tube l5 by the vaporous refrigerant being drawn into the second compressor 3 and is thereby transferred to the second compressor, wherein it collects in the sump l2 thereof. Thus, satisfactory oil levels are maintained in. the sumps of both the first and second compressors.
If for any reason the first compressor 2 is shut down the second compressor 3 is effective for transferring through the tube !5 all oil in excess of the normal level in the sump 9 of the first compressor. If the second compressor 3 is shut down, the oil will collect in the sump 9 of the first compressor 2 and exceed th normal level therein. However, the first few restarting strokes of the second compressor 3 will be elfective for drawing over through the tube l5 and into the sump [2 thereof a satisfactory amount of the oil.
It will be seen that with my invention it is possible by the utilization of a single transfer tube both to equalize pressures between two compressors connected in parallel and to maintain satisfactory oil levels in the sumps of the compressors, regardless of whether the compressors are disposed at different heights, as shown in Fig. 2, or at the same height. Also, my invention is readily and easily adaptable to any parallel compressor arrangement including more than two compressors.
While I have shown and described a specific embodiment of my invention, I do not desire my invention to be limited to the particular construction shown and described and I'intend in the appended claims to cover all modifications within the spirit and scope of my invention,
What I claim as new and desire to secure by Letters Patent of the United States is:
1. In a refrigerating system including an exhaust line and a suction line, the combination of a pair of compressors, each of said compressors having an oil sump, said compressors being commonly connected to said exhaust line, only on of said compressors being connected to said suction line and receiving initially all of the oil and vaporized refrigerant from said suction line and a single tube connecting said pair of compressors, one end of said tube extending into said one compressor and to the normal oil level in the sump thereof, the other end'oi said tube being connected to the other compressor above the sump thereof, said tube being effective for both equalizing vapor pressures in said compressors and transferring oil exceeding the normal level in the sump of said one compressor 4 to said other compressor for collection in the sump thereof.
In a refrigerating system including an exhaust line and a suction line, the combination of a first and a second compressor disposed at different heights, each of said compressors including an oil sump, each of said compressors including an outlet passage, and an inlet passage located above its corresponding sump, the outlet passages of said compressors being commonly connected to said exhaust line, the inlet passage of'said first compressor only being connected tosaid suction line whereby said first compressor receives initially all of the oil and vaporized refrigerant from said suction line, a
singletransfer tube, one end. of said tube being connected to the inlet passage of said second compressor, the other end of said tube extending into said first compressor and to the normal oil level in the sum thereof, said transfer tube being 'effectiveboth for equalizing vapor pressures in said'compressors and for transferring oil exceeding the normal level in the sump of said first compressor to said second compressor for maintaining a satisfactory oil level in the sump thereof.
LOWELL M. KURTZ.
fleferences Cited in the file of this patent UNITED STATES PATENTS Number Name Date 2,178,100 Gygax Oct. 31, 1939. 2,246,244 Consley .r June 1'7, 1941 2,606,430 Pownall V Aug. 12, 1 2
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US254540A US2663164A (en) | 1951-11-02 | 1951-11-02 | Parallel compressor arrangement in refrigerating system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US254540A US2663164A (en) | 1951-11-02 | 1951-11-02 | Parallel compressor arrangement in refrigerating system |
Publications (1)
Publication Number | Publication Date |
---|---|
US2663164A true US2663164A (en) | 1953-12-22 |
Family
ID=22964670
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US254540A Expired - Lifetime US2663164A (en) | 1951-11-02 | 1951-11-02 | Parallel compressor arrangement in refrigerating system |
Country Status (1)
Country | Link |
---|---|
US (1) | US2663164A (en) |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3386262A (en) * | 1966-10-31 | 1968-06-04 | Trane Co | Refrigeration apparatus with compressors in parallel |
US3785169A (en) * | 1972-06-19 | 1974-01-15 | Westinghouse Electric Corp | Multiple compressor refrigeration system |
US4105374A (en) * | 1977-03-28 | 1978-08-08 | Copeland Corporation | Integrated multi-unit refrigeration motor-compressor assembly |
US5435144A (en) * | 1994-02-24 | 1995-07-25 | Kalmbach; John | Compressor lubricant distributing system for motor vehicles having auxiliary air conditioning |
US5839886A (en) * | 1996-05-10 | 1998-11-24 | Shaw; David N. | Series connected primary and booster compressors |
US5927088A (en) * | 1996-02-27 | 1999-07-27 | Shaw; David N. | Boosted air source heat pump |
US6276148B1 (en) | 2000-02-16 | 2001-08-21 | David N. Shaw | Boosted air source heat pump |
US20040118062A1 (en) * | 2001-05-17 | 2004-06-24 | Wuestman Tuindecoraties B.V. | Connection for wall elements |
US20050044866A1 (en) * | 2003-08-27 | 2005-03-03 | Shaw David N. | Boosted air source heat pump |
US20060073026A1 (en) * | 2004-10-06 | 2006-04-06 | Shaw David N | Oil balance system and method for compressors connected in series |
US20080173034A1 (en) * | 2007-01-19 | 2008-07-24 | Hallowell International, Llc | Heat pump apparatus and method |
US20090064709A1 (en) * | 2005-08-26 | 2009-03-12 | Mitsubishi Electric Corporation | Refrigerating air conditioner |
CN103032996A (en) * | 2012-12-12 | 2013-04-10 | 宁波奥克斯电气有限公司 | Parallel compressor selection and configuration method for preventing compressor from being frequently started up and shut down |
US20140154105A1 (en) * | 2012-12-03 | 2014-06-05 | Danfoss (Tianjin) Ltd. | Oil balancing apparatus and refrigeration device |
US20180306472A1 (en) * | 2015-10-15 | 2018-10-25 | Carrier Corporation | Multi-Stage Oil Batch Boiling System |
US10571167B2 (en) | 2015-03-20 | 2020-02-25 | Carrier Corporation | Transportation refrigeration unit with multiple compressors |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2178100A (en) * | 1937-05-13 | 1939-10-31 | Curtis Refrigerating Machine C | Refrigerating condensing unit |
US2246244A (en) * | 1940-06-19 | 1941-06-17 | York Ice Machinery Corp | Refrigeration |
US2606430A (en) * | 1951-08-24 | 1952-08-12 | Freezing Equipment Sales Inc | Automatic lubrication means for plural stage compressors |
-
1951
- 1951-11-02 US US254540A patent/US2663164A/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2178100A (en) * | 1937-05-13 | 1939-10-31 | Curtis Refrigerating Machine C | Refrigerating condensing unit |
US2246244A (en) * | 1940-06-19 | 1941-06-17 | York Ice Machinery Corp | Refrigeration |
US2606430A (en) * | 1951-08-24 | 1952-08-12 | Freezing Equipment Sales Inc | Automatic lubrication means for plural stage compressors |
Cited By (30)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3386262A (en) * | 1966-10-31 | 1968-06-04 | Trane Co | Refrigeration apparatus with compressors in parallel |
US3785169A (en) * | 1972-06-19 | 1974-01-15 | Westinghouse Electric Corp | Multiple compressor refrigeration system |
FR2189689A1 (en) * | 1972-06-19 | 1974-01-25 | Westinghouse Electric Corp | |
US4105374A (en) * | 1977-03-28 | 1978-08-08 | Copeland Corporation | Integrated multi-unit refrigeration motor-compressor assembly |
DE2810059A1 (en) * | 1977-03-28 | 1978-10-12 | Copeland Corp | MULTIPLE ARRANGEMENT OF MOTOR / COMPRESSOR UNITS FOR COOLING SYSTEMS |
FR2386000A1 (en) * | 1977-03-28 | 1978-10-27 | Copeland Corp | REFRIGERATION MOTOR-COMPRESSOR ASSEMBLY WITH INTEGRATED MULTIPLE UNITS |
US5435144A (en) * | 1994-02-24 | 1995-07-25 | Kalmbach; John | Compressor lubricant distributing system for motor vehicles having auxiliary air conditioning |
US5927088A (en) * | 1996-02-27 | 1999-07-27 | Shaw; David N. | Boosted air source heat pump |
US5839886A (en) * | 1996-05-10 | 1998-11-24 | Shaw; David N. | Series connected primary and booster compressors |
USRE39625E1 (en) | 2000-02-16 | 2007-05-15 | Hallowell International, Llc | Boosted air source heat pump |
US6276148B1 (en) | 2000-02-16 | 2001-08-21 | David N. Shaw | Boosted air source heat pump |
US20040118062A1 (en) * | 2001-05-17 | 2004-06-24 | Wuestman Tuindecoraties B.V. | Connection for wall elements |
US20050044866A1 (en) * | 2003-08-27 | 2005-03-03 | Shaw David N. | Boosted air source heat pump |
US6931871B2 (en) | 2003-08-27 | 2005-08-23 | Shaw Engineering Associates, Llc | Boosted air source heat pump |
US7651322B2 (en) | 2004-10-06 | 2010-01-26 | Hallowell International, Llc | Oil balance system and method for compressors connected in series |
US7712329B2 (en) | 2004-10-06 | 2010-05-11 | David Shaw | Oil balance system and method for compressors |
US8075283B2 (en) | 2004-10-06 | 2011-12-13 | Hallowell International, Llc | Oil balance system and method for compressors connected in series |
US20080283133A1 (en) * | 2004-10-06 | 2008-11-20 | Hallowell International, Llc | Oil balance system and method for compressors connected in series |
US20090007588A1 (en) * | 2004-10-06 | 2009-01-08 | David Shaw | Oil Balance System and Method for Compressors |
US20080085195A1 (en) * | 2004-10-06 | 2008-04-10 | Hallowell International, Llc | Oil balance system and method for compressors connected in series |
US20060073026A1 (en) * | 2004-10-06 | 2006-04-06 | Shaw David N | Oil balance system and method for compressors connected in series |
US20090064709A1 (en) * | 2005-08-26 | 2009-03-12 | Mitsubishi Electric Corporation | Refrigerating air conditioner |
US8109116B2 (en) * | 2005-08-26 | 2012-02-07 | Mitsubishi Electric Corporation | Dual compressor air conditioning system with oil level regulation |
US20080173034A1 (en) * | 2007-01-19 | 2008-07-24 | Hallowell International, Llc | Heat pump apparatus and method |
US20140154105A1 (en) * | 2012-12-03 | 2014-06-05 | Danfoss (Tianjin) Ltd. | Oil balancing apparatus and refrigeration device |
US9657975B2 (en) * | 2012-12-03 | 2017-05-23 | Danfoss (Tianjin) Ltd. | Oil balancing apparatus and refrigeration device |
CN103032996A (en) * | 2012-12-12 | 2013-04-10 | 宁波奥克斯电气有限公司 | Parallel compressor selection and configuration method for preventing compressor from being frequently started up and shut down |
US10571167B2 (en) | 2015-03-20 | 2020-02-25 | Carrier Corporation | Transportation refrigeration unit with multiple compressors |
US20180306472A1 (en) * | 2015-10-15 | 2018-10-25 | Carrier Corporation | Multi-Stage Oil Batch Boiling System |
US11029065B2 (en) * | 2015-10-15 | 2021-06-08 | Carrier Corporation | Multi-stage oil batch boiling system |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2663164A (en) | Parallel compressor arrangement in refrigerating system | |
US3785169A (en) | Multiple compressor refrigeration system | |
US3581519A (en) | Oil equalization system | |
US3386262A (en) | Refrigeration apparatus with compressors in parallel | |
GB2232471A (en) | Refrigeration system | |
US2183343A (en) | Refrigeration apparatus and method | |
US2253623A (en) | Refrigerating apparatus | |
US2048025A (en) | Refrigerating apparatus | |
EP1671067B1 (en) | Distributed condensing units | |
US2418853A (en) | Refrigerating apparatus in which the pressure in the crankcase of the compressor is controlled | |
US2076332A (en) | Lubrication system | |
US2665557A (en) | Lubricant separating system for refrigerating machines | |
US2300005A (en) | Refrigerating apparatus | |
US2269205A (en) | Air cooling apparatus | |
US2963216A (en) | Refrigerating apparatus | |
US2975613A (en) | Refrigerating apparatus with aspirator in a by-pass | |
US2464563A (en) | Refrigeration charging and evacuation apparatus | |
US2672736A (en) | Compressor cooling in refrigerating apparatus | |
US2622407A (en) | Two-temperature refrigerating system | |
US2077021A (en) | Air conditioning apparatus | |
US3013403A (en) | Refrigeration system embodying aircooled condensers | |
US2867098A (en) | Refrigerant receiver and oil separator | |
US2068677A (en) | Refrigerating system | |
US2485417A (en) | Compressor | |
US1899341A (en) | Magnetic unloader |