US3869874A - Refrigeration apparatus with defrosting system - Google Patents
Refrigeration apparatus with defrosting system Download PDFInfo
- Publication number
- US3869874A US3869874A US430296A US43029674A US3869874A US 3869874 A US3869874 A US 3869874A US 430296 A US430296 A US 430296A US 43029674 A US43029674 A US 43029674A US 3869874 A US3869874 A US 3869874A
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- US
- United States
- Prior art keywords
- stage
- line
- compressor
- gas
- evaporator
- 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
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Classifications
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- 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
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
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- 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
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
- F25B1/10—Compression machines, plants or systems with non-reversible cycle with multi-stage compression
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- 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
-
- 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
- F25B40/00—Subcoolers, desuperheaters or superheaters
- F25B40/02—Subcoolers
Definitions
- ABSTRACT An improved defrosting system for use with refrigeration apparatus, particularly of the type used for frozen food storage.
- the apparatus uses a two stage compressor with interstage cooling. During the defrost cycle, the suction gas from the evaporator coil is directed through the compressor so that the operation is in parallel, with a portion of the gas being admitted to the suction side of both the high stage and the low stage of the compressor. This permits an increased volume of hot gas at a higher temperature to be supplied to the evaporator and greatly reduces the time required to defrost the coil.
- This invention relates generally to defrosting arrangements for refrigeration apparatus used in frozen food storage or cold room applications.
- it has been conventional to employ a two stage compressor to permit operation to 30F without exceeding safe operating temperatures when condensing with ambient air as high as 145F.
- FIGURE is a schematic diagrammatic representation of a refrigeration apparatus constructed in accordance with the principles of the present invention.
- reference numeral designates a compressor having a low stage 12 and a high stage 14.
- discharge gas from the compressor flows to condenser 16, receiver 18, and subcooler to a flow-retarding unit 19 of the type described in US. Pat. No. 3,163,998.
- refrigerant flows to an expansion device 22 and the liquid refrigerant is then expanded into the evaporator 24, flowing back to the compressor through an accumulator 28.
- line connects the discharge side of the high stage 14 to a sole noid valve 32.
- Line 34 continues the hot gas line leading from solenoid 32 to the inlet side ofair cooled condenser 16.
- the condensed refrigerant then flows through line 36, check valve 38 to receiver 18.
- Line 40 connects the receiver to the inlet side of the subcooler 20, which usually forms the lower section of the condenser.
- the liquid refrigerant flows through line 40 to a T fitting 44 which provides a branch line 46 for interstage cooling, in a manner to be described below, and a branch line 48 passing through solenoid valve 50 to the liquid refrigerant line 52 on the inlet side of unit 19 and then through expansion device 22 to the evaporator 24.
- the suction gas from the evaporator 24 flows through line 54 to the accumulator and from the accumulator through line 56 to a second T fitting 58.
- One branch line 60 from T 58 flows to the suction side of the low stage 12; and the other branch line 62 is connected to a one-way valve 64, line 66, to a T 68.
- Line 70 leads from the discharge side of low stage 12 to a cross-flow fitting 74 which joins the low stage discharge with interstage cooling line 80.
- Line contains a one-way valve 82, connected to line 46, solenoid valve 84 and expansion valve 86.
- the expanded refrigerant mixes with the hot discharge gas from the low stage at fitting 74 and may be directed through line 76 and one-way valve 88 or continue through line 70, through valve 72 to a T fitting 68 and high stage suction line 92.
- solenoid valves 72, 84, 32 and 50 are open; and valve 98 is closed. Accordingly. suction gas from the evaporator flows through line 54 through the accumulator 28. From the accumulator, the gas flows through lines 56 and 6 0 to the low stage of the compressor. With valve 72 open, hot gas then flows through lines 70 and 92 to the inlet side of the high stage compressor, and then through line 30, solenoid valve 32, and line 34 to the condenser 16. The liquid refrigerant leaves the condenser and flows through line 36, one-way valve 38, receiver 18 and line 40 the subcooler 20.
- the subcooled refrigerant then flows through line 42 and is split into two streams, one flowing through line 46, one-way valve 82, solenoid 84 and expansion device 86 to mix with the gas leaving the low stage through line 70 at cross-flow connection 74.
- the other stream flows through line 48, solenoid 50 and liquid line 52 to the flow retarding unit 19.
- unit 19 is described in considerable detail in the previously noted US. Pat. No. 3,163,998 it is not necessary to repeat such description, which is incorporated herein by reference. It is understood that such unit, which is optional in the present invention, permits the controlled flow of liquid refrigerant, condensed in the evaporator during defrosting, back to the compressor.
- Line 52 connects to a heat exchanger (not shown) in unit 19 and passes liquid through line 53 to expansion valve 22.
- Suction gas flows into unit 19 through line 55 and out through line 54.
- the defrost hot gas connection is shown at 57.
- a refrigeration system comprising: a compressor, a condenser, an expansion device and an evaporator all connected in closed-circuit, refrigerant flow relationship, said compressor having a low stage and a high stage; a valve in said interstage gas line; a branch line connecting said evaporator and said high stage, whereby upon closing of said valve, suction gas will flow through said low stage and said high stage in parallel; and means for cooling gas flowing through said in-
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Defrosting Systems (AREA)
Abstract
Description
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US430296A US3869874A (en) | 1974-01-02 | 1974-01-02 | Refrigeration apparatus with defrosting system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US430296A US3869874A (en) | 1974-01-02 | 1974-01-02 | Refrigeration apparatus with defrosting system |
Publications (1)
Publication Number | Publication Date |
---|---|
US3869874A true US3869874A (en) | 1975-03-11 |
Family
ID=23706919
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US430296A Expired - Lifetime US3869874A (en) | 1974-01-02 | 1974-01-02 | Refrigeration apparatus with defrosting system |
Country Status (1)
Country | Link |
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US (1) | US3869874A (en) |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3996764A (en) * | 1975-03-24 | 1976-12-14 | Fedders Corporation | Refrigerant cooling apparatus |
US4171622A (en) * | 1976-07-29 | 1979-10-23 | Matsushita Electric Industrial Co., Limited | Heat pump including auxiliary outdoor heat exchanger acting as defroster and sub-cooler |
US4197716A (en) * | 1977-09-14 | 1980-04-15 | Halstead Industries, Inc. | Refrigeration system with auxiliary heat exchanger for supplying heat during defrost cycle and for subcooling the refrigerant during a refrigeration cycle |
US4660384A (en) * | 1986-04-25 | 1987-04-28 | Vilter Manufacturing, Inc. | Defrost apparatus for refrigeration system and method of operating same |
US4850197A (en) * | 1988-10-21 | 1989-07-25 | Thermo King Corporation | Method and apparatus for operating a refrigeration system |
US4962647A (en) * | 1988-06-30 | 1990-10-16 | Kabushika Kaisha Toshiba | Refrigerating circuit apparatus with two stage compressor and heat storage tank |
EP0658730A1 (en) * | 1993-12-14 | 1995-06-21 | Carrier Corporation | Economizer control for two-stage compressor systems |
US6401485B1 (en) * | 2000-10-06 | 2002-06-11 | American Standard Inc. | Discharge refrigerant heater for inactive compressor line |
US6588221B1 (en) * | 2002-10-23 | 2003-07-08 | Super S.E.E.R Systems Inc. | Refrigeration system with dedicated compressor for hot gas defrost |
US20030188544A1 (en) * | 2001-07-02 | 2003-10-09 | Haruhisa Yamasaki | Heat pump device |
US20060168994A1 (en) * | 2001-09-27 | 2006-08-03 | Sanyo Electric Co., Ltd. | Compressor, method for manufacturing the compressor, defroster of refrigerant circuit, and refrigeration unit |
US20070227182A1 (en) * | 2006-03-28 | 2007-10-04 | Sanyo Electric Co., Ltd. | Manufacturing method of transition critical refrigerating cycle device |
EP1977175A1 (en) * | 2006-01-27 | 2008-10-08 | Carrier Corporation | Refrigerant system unloading by-pass into evaporator inlet |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2841962A (en) * | 1957-01-23 | 1958-07-08 | H A Phillips | Return apparatus for a two-stage refrigeration system |
US3184926A (en) * | 1963-10-10 | 1965-05-25 | Ray Winther Company | Refrigeration system |
US3234752A (en) * | 1963-05-20 | 1966-02-15 | Hussmann Refrigerator Co | Desuperheater for refrigeration system |
US3234753A (en) * | 1963-01-03 | 1966-02-15 | Lester K Quick | Hot gas refrigeration defrosting system |
-
1974
- 1974-01-02 US US430296A patent/US3869874A/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2841962A (en) * | 1957-01-23 | 1958-07-08 | H A Phillips | Return apparatus for a two-stage refrigeration system |
US3234753A (en) * | 1963-01-03 | 1966-02-15 | Lester K Quick | Hot gas refrigeration defrosting system |
US3234752A (en) * | 1963-05-20 | 1966-02-15 | Hussmann Refrigerator Co | Desuperheater for refrigeration system |
US3184926A (en) * | 1963-10-10 | 1965-05-25 | Ray Winther Company | Refrigeration system |
Cited By (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3996764A (en) * | 1975-03-24 | 1976-12-14 | Fedders Corporation | Refrigerant cooling apparatus |
US4171622A (en) * | 1976-07-29 | 1979-10-23 | Matsushita Electric Industrial Co., Limited | Heat pump including auxiliary outdoor heat exchanger acting as defroster and sub-cooler |
US4197716A (en) * | 1977-09-14 | 1980-04-15 | Halstead Industries, Inc. | Refrigeration system with auxiliary heat exchanger for supplying heat during defrost cycle and for subcooling the refrigerant during a refrigeration cycle |
US4660384A (en) * | 1986-04-25 | 1987-04-28 | Vilter Manufacturing, Inc. | Defrost apparatus for refrigeration system and method of operating same |
US5046325A (en) * | 1988-06-30 | 1991-09-10 | Kabushiki Kaisha Toshiba | Refrigerating circuit apparatus with two stage compressor and heat storage tank |
US4962647A (en) * | 1988-06-30 | 1990-10-16 | Kabushika Kaisha Toshiba | Refrigerating circuit apparatus with two stage compressor and heat storage tank |
US4850197A (en) * | 1988-10-21 | 1989-07-25 | Thermo King Corporation | Method and apparatus for operating a refrigeration system |
EP0658730A1 (en) * | 1993-12-14 | 1995-06-21 | Carrier Corporation | Economizer control for two-stage compressor systems |
US5582022A (en) * | 1993-12-14 | 1996-12-10 | Carrier Corporation | Economizer control for two-stage compressor systems |
US6401485B1 (en) * | 2000-10-06 | 2002-06-11 | American Standard Inc. | Discharge refrigerant heater for inactive compressor line |
EP1403600A4 (en) * | 2001-07-02 | 2006-06-07 | Sanyo Electric Co | Heat pump device |
US20030188544A1 (en) * | 2001-07-02 | 2003-10-09 | Haruhisa Yamasaki | Heat pump device |
EP1403600A1 (en) * | 2001-07-02 | 2004-03-31 | Sanyo Electric Co., Ltd. | Heat pump device |
US6880352B2 (en) * | 2001-07-02 | 2005-04-19 | Sanyo Electric Co., Ltd. | Heat pump device |
US20060168994A1 (en) * | 2001-09-27 | 2006-08-03 | Sanyo Electric Co., Ltd. | Compressor, method for manufacturing the compressor, defroster of refrigerant circuit, and refrigeration unit |
US7302803B2 (en) * | 2001-09-27 | 2007-12-04 | Sanyo Electric Co., Ltd. | Compressor, method for manufacturing the compressor, defroster of refrigerant circuit, and refrigerant unit |
US6588221B1 (en) * | 2002-10-23 | 2003-07-08 | Super S.E.E.R Systems Inc. | Refrigeration system with dedicated compressor for hot gas defrost |
EP1977175A1 (en) * | 2006-01-27 | 2008-10-08 | Carrier Corporation | Refrigerant system unloading by-pass into evaporator inlet |
EP1977175A4 (en) * | 2006-01-27 | 2013-12-25 | Carrier Corp | Refrigerant system unloading by-pass into evaporator inlet |
US20070227182A1 (en) * | 2006-03-28 | 2007-10-04 | Sanyo Electric Co., Ltd. | Manufacturing method of transition critical refrigerating cycle device |
US8539791B2 (en) * | 2006-03-28 | 2013-09-24 | Sanyo Electric Co., Ltd. | Manufacturing method of transition critical refrigerating cycle device |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: YORK INTERNATIONAL CORPORATION, 631 SOUTH RICHLAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST. EFFECTIVE;ASSIGNOR:BORG-WARNER CORPORATION;REEL/FRAME:004676/0360 Effective date: 19860609 |
|
AS | Assignment |
Owner name: CANADIAN IMPERIAL BANK OF COMMERCE Free format text: SECURITY INTEREST;ASSIGNOR:YORK OPERATING COMPANY, F/K/A YORK INTERNATIONAL CORPORATION A DE CORP.;REEL/FRAME:005994/0916 Effective date: 19911009 |
|
AS | Assignment |
Owner name: CANADIAN IMPERIAL BANK OF COMMERCE Free format text: SECURITY INTEREST;ASSIGNOR:YORK INTERNATIONAL CORPORATION (F/K/A YORK OPERATING COMPANY);REEL/FRAME:006007/0123 Effective date: 19911231 |
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AS | Assignment |
Owner name: CANADIAN IMPERIAL BANK OF COMMERCE Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:YORK INTERNATIONAL CORPORATION, A DE CORP.;REEL/FRAME:006194/0182 Effective date: 19920630 |