DK200501574A - Defrost system - Google Patents

Defrost system Download PDF

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Publication number
DK200501574A
DK200501574A DK200501574A DKPA200501574A DK200501574A DK 200501574 A DK200501574 A DK 200501574A DK 200501574 A DK200501574 A DK 200501574A DK PA200501574 A DKPA200501574 A DK PA200501574A DK 200501574 A DK200501574 A DK 200501574A
Authority
DK
Denmark
Prior art keywords
defrost
refrigeration system
receiver
defrosting
defrost system
Prior art date
Application number
DK200501574A
Other languages
Danish (da)
Inventor
Rolfsman Lennart
Pachai Alexander Cohr
Original Assignee
York Denmark Aps
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 York Denmark Aps filed Critical York Denmark Aps
Priority to DK200501574A priority Critical patent/DK200501574A/en
Publication of DK200501574A publication Critical patent/DK200501574A/en
Priority to PCT/DK2006/000621 priority patent/WO2007054095A1/en
Priority to CNA2006800465248A priority patent/CN101365917A/en
Priority to US12/093,245 priority patent/US20090223232A1/en
Priority to EP06805559A priority patent/EP1963764A1/en

Links

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
    • F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02—Defrosting cycles
    • 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
    • F25B2309/00—Gas cycle refrigeration machines
    • F25B2309/06—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide
    • 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
    • F25B2400/23—Separators
    • 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
    • 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
    • F25B7/00—Compression machines, plants or systems, with cascade operation, i.e. with two or more circuits, the heat from the condenser of one circuit being absorbed by the evaporator of the next circuit
    • 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
    • F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
    • F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
    • F25B9/008—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant the refrigerant being carbon dioxide

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Defrosting Systems (AREA)

Description

CLAIMS 1. Defrost system (2) for defrosting components (150) on which frost is formed, where the defrost system (2) comprises at least one compressor (10), which compressor (10) has a hot gas outlet (12), which is connected to condensing means (30), from where primarily liquid refrigerant is connected to pressure reduction means (50), from where the e refrigerant is led towards evaporator means (70, 210, 220), characterized in that the defrost system (2) is formed as a independent cooling system, where the condensing means (30) are transmitting heat to the defrosting components (150). 2. Defrost system according to claim 1, characterized in that the evaporator (70, 210, 220) is cooperating with external cooling means enabling defrost without deflecting the maim system (4). 3. Defrost system according to claim 1 or 2, characterized in that the defrost system (2) are operating in conjunction with a refrigeration system (4), which refrigeration system (4) is in operation, where the condensing means (30) of the defrost system is cooperating with defrosting components (150) cooled by the refrigeration system (4) for defrosting the components (150) 4. Defrost system according to claim 1 or 2, characterized in that the defrost system (2) is operating in conjunction with a refrigeration system (4), which refrigeration system (4) is in standstill, where the condensing means (30) of the defrost system (2) is cooperating with defrosting components (150) cooled by the second refrigeration system (4) for defrosting the components (150). 5. Defrost system according one of the claims 1-4, characterized in that the defrost system (2) comprises a liquid receiver (40), which receiver (40) is connected to an expansion valve (50), where a gas connection (44) from the upper part of the receiver (50) is connected to the receiver (40). 6. Defrost system according to one of the claims 1-5, characterized in that the evaporator (210, 220) of the defrost system (2) cooperates with the second refrigeration system (4) by forming the evaporator in a second heat exchanger (210) which is heated by partly or full liquefied refrigerant of the second refrigeration system (4). 7. Defrost system according to one of the claims 1-6, characterized in that the top of the receiver (40) in the defrost system (2) is used as a liquid separator, where the top of the receiver (40) is connected through a first heat exchanger (200) for liquefying the gas, which liquid gas is led back towards the receiver (40), where the first heat exchanger (200) is part of a cascade heat exchanger, which is part of the second refrigeration system (4). 8. Defrost system according to one of the claims 1-7, characterized in that the receiver (240) comprises a heat-exchanging coil (242) in the upper part, which coil (242) is connected to the liquid outlet from the receiver (42), where the coil is reducing the temperature of the gas in the top of the receiver 240). 9. Method for defrosting a refrigeration system comprising at least one refrigeration system component on which frost is formed, where defrosting is performed by heating the refrigeration system component in periods of no operation of that refrigeration system component, characterized in that defrosting is performed by an independent defrost system, which defrost system comprises at least compressing means for compressing and heating a defrost gas, which defrost gas is heating the refrigeration system components by condensing the defrost gas, which defrosting is performed in periods of no supply of refrigerant to the refrigeration system component from the refrigeration system, where the defrost system comprises a closed circuit for defrost fluid without connection to the refrigeration system.CLAIMS 1. Defrost system (2) for defrosting components (150) on which frost is formed, where the defrost system (2) comprises at least one compressor (10), which compressor (10) has a hot gas outlet (12), which is connected to condensing means (30), from where primarily liquid refrigerant is connected to pressure reduction means (50), from where the e refrigerant is led towards evaporator means (70, 210, 220), characterized in that the defrost system ( 2) is formed as an independent cooling system, where the condensing means (30) are transmitting heat to the defrosting components (150). Defrost system according to claim 1, characterized in that the evaporator (70, 210, 220) is cooperating with external cooling means enabling defrost without deflecting the maim system (4). Defrost system according to claim 1 or 2, characterized in that the defrost system (2) are operating in conjunction with a refrigeration system (4), which refrigeration system (4) is in operation, where the condensing means (30) of the defrost system is cooperating with defrosting components (150) cooled by the refrigeration system (4) for defrosting the components (150) 4. Defrost system according to claim 1 or 2, characterized in that the defrost system (2) is operating in conjunction with a refrigeration system (4), which refrigeration system (4) is in standstill, where the condensing means (30) of the defrost system (2) is cooperating with defrosting components (150) cooled by the second refrigeration system (4) for defrosting the components (150). Defrost system according to one of claims 1-4, characterized in that the defrost system (2) comprises a liquid receiver (40), which receiver (40) is connected to an expansion valve (50), where a gas connection ( 44) from the upper part of the receiver (50) is connected to the receiver (40). 6. Defrost system according to one of claims 1-5, characterized in that the evaporator (210, 220) of the defrost system (2) cooperates with the second refrigeration system (4) by forming the evaporator in a second heat exchanger ( 210) which is heated by partly or full liquefied refrigerant of the second refrigeration system (4). Defrost system according to one of claims 1-6, characterized in that the top of the receiver (40) in the defrost system (2) is used as a liquid separator, where the top of the receiver (40) is connected through a first heat exchanger (200) for liquefying the gas, which liquid gas is led back towards the receiver (40), where the first heat exchanger (200) is part of a cascade heat exchanger, which is part of the second refrigeration system (4). Defrost system according to one of claims 1-7, characterized in that the receiver (240) comprises a heat-exchanging coil (242) in the upper part, which coil (242) is connected to the liquid outlet from the receiver (42), where the coil is reducing the temperature of the gas in the top of the receiver 240). 9. Method for defrosting a refrigeration system comprising at least one refrigeration system component on which frost is formed, where defrosting is performed by heating the refrigeration system component in periods of no operation of that refrigeration system component, characterized in that defrosting is performed by an independent defrost system, which defrost system comprises at least compressing means for compressing and heating a defrost gas, which defrost gas is heating the refrigeration system components by condensing the defrost gas, which defrosting is performed in periods of no supply of refrigerant to the refrigeration system component from the refrigeration system, where the defrost system comprises a closed circuit for defrost fluid without connection to the refrigeration system.

DK200501574A 2005-11-11 2005-11-11 Defrost system DK200501574A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DK200501574A DK200501574A (en) 2005-11-11 2005-11-11 Defrost system
PCT/DK2006/000621 WO2007054095A1 (en) 2005-11-11 2006-11-10 Defrost system
CNA2006800465248A CN101365917A (en) 2005-11-11 2006-11-10 Defrost system
US12/093,245 US20090223232A1 (en) 2005-11-11 2006-11-10 Defrost system
EP06805559A EP1963764A1 (en) 2005-11-11 2006-11-10 Defrost system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DK200501574A DK200501574A (en) 2005-11-11 2005-11-11 Defrost system

Publications (1)

Publication Number Publication Date
DK200501574A true DK200501574A (en) 2005-11-25

Family

ID=35517028

Family Applications (1)

Application Number Title Priority Date Filing Date
DK200501574A DK200501574A (en) 2005-11-11 2005-11-11 Defrost system

Country Status (5)

Country Link
US (1) US20090223232A1 (en)
EP (1) EP1963764A1 (en)
CN (1) CN101365917A (en)
DK (1) DK200501574A (en)
WO (1) WO2007054095A1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101663546B (en) * 2007-03-09 2011-11-16 开利公司 Prevention of refrigerant solidification
US8789380B2 (en) * 2009-07-20 2014-07-29 Systemes Lmp Inc. Defrost system and method for a subcritical cascade R-744 refrigeration system
US20140260361A1 (en) * 2013-03-15 2014-09-18 Benoit RODIER Refrigeration apparatus and method
CN105579790B (en) * 2013-09-27 2017-04-05 松下健康医疗控股株式会社 Refrigerating plant
WO2015093235A1 (en) * 2013-12-17 2015-06-25 株式会社前川製作所 Sublimation defrost system for refrigeration devices and sublimation defrost method
US9869492B2 (en) * 2015-10-12 2018-01-16 Heatcraft Refrigeration Products Llc Air conditioning and refrigeration system
US20190072299A1 (en) * 2017-09-06 2019-03-07 Heatcraft Refrigeration Products Llc Refrigeration system with integrated air conditioning by a high pressure expansion valve
CN109357438A (en) * 2018-11-30 2019-02-19 山东陆海新能源技术有限公司 The low-temperature air source heat pump of afterheat recovery type removes defrosting system
US11137185B2 (en) * 2019-06-04 2021-10-05 Farrar Scientific Corporation System and method of hot gas defrost control for multistage cascade refrigeration system
US11841179B2 (en) * 2020-01-14 2023-12-12 Goodman Global Group, Inc. Heating, ventilation, and air-conditioning systems and methods

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US3392541A (en) * 1967-02-06 1968-07-16 Larkin Coils Inc Plural compressor reverse cycle refrigeration or heat pump system
US3537274A (en) * 1968-10-18 1970-11-03 Alco Controls Corp Dual evaporator refrigeration system
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US3978684A (en) * 1975-04-17 1976-09-07 Thermo King Corporation Refrigeration system
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JP3094996B2 (en) * 1998-09-30 2000-10-03 ダイキン工業株式会社 Binary refrigeration equipment

Also Published As

Publication number Publication date
US20090223232A1 (en) 2009-09-10
WO2007054095A1 (en) 2007-05-18
EP1963764A1 (en) 2008-09-03
CN101365917A (en) 2009-02-11

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