GB1524366A - Control and method for defrosting regrigeration systems - Google Patents

Control and method for defrosting regrigeration systems

Info

Publication number
GB1524366A
GB1524366A GB34129/75A GB3412975A GB1524366A GB 1524366 A GB1524366 A GB 1524366A GB 34129/75 A GB34129/75 A GB 34129/75A GB 3412975 A GB3412975 A GB 3412975A GB 1524366 A GB1524366 A GB 1524366A
Authority
GB
United Kingdom
Prior art keywords
defrost
contacts
evaporator
defrosting
closed
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
Application number
GB34129/75A
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.)
Emhart Industries Inc
Original Assignee
Emhart Industries Inc
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 Emhart Industries Inc filed Critical Emhart Industries Inc
Publication of GB1524366A publication Critical patent/GB1524366A/en
Expired legal-status Critical Current

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
    • F25B47/022—Defrosting cycles hot gas defrosting
    • 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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/002—Defroster control
    • 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
    • F25B2347/00—Details for preventing or removing deposits or corrosion
    • F25B2347/02—Details of defrosting cycles
    • F25B2347/021—Alternate defrosting
    • 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
    • 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
    • F25B2400/22—Refrigeration systems for supermarkets
    • 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
    • F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity

Landscapes

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

Abstract

1524366 Defrosting EMHART INDUSTRIES Inc 15 Aug 1975 [15 Aug 1974 4 Aug 1975] 34129/75 Heading F4H In a refrigeration system comprising a plurality of evaporators each having a defrost arrangement and a sensor for rendering the defrost arrangement capable of operation under predetermined conditions, a control system is provided for selectively initiating the operation of those defrost arrangements which have been rendered capable of operation by their sensors whereby not all of the evaporators will be defrosted at the same time. As shown in Fig. 1, the refrigeration system comprises a compressor 2, a condenser 6. and evaporators 72, 74, 76, 78, 20, with associated expansion valves 32. To defrost an evaporator, hot gas from the pressure line 4 passes through a normally-closed defrost valve 38, to the evaporator and thence through an expansion valve by-pass line 40, a normally-open solenoid valve 39 in the suction line 34 having been closed. Each evaporator is provided with ice and frost sensors 44, 46 which, when defrosting is necessary, close contacts 48 in the circuit of the solenoid controlling the defrost valve 38 which is thereby rendered operative but which will not be actuated until associated contacts 68 are closed by a control device 52 to complete the circuit. The control device 52 comprises a rotatable shaft 56 having cams 58, 60, 62, 64, 66 associated with the contacts 68, the arrangement being such that the shaft is rotated until it closes contacts 68 associated with an evaporator whose contacts 48 have already been closed. The shaft 56 then remains stationary until the defrosting of that evaporator is completed and the contacts 48 open.
GB34129/75A 1974-08-15 1975-08-15 Control and method for defrosting regrigeration systems Expired GB1524366A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US49761074A 1974-08-15 1974-08-15
US60001175A 1975-08-04 1975-08-04

Publications (1)

Publication Number Publication Date
GB1524366A true GB1524366A (en) 1978-09-13

Family

ID=27052572

Family Applications (1)

Application Number Title Priority Date Filing Date
GB34129/75A Expired GB1524366A (en) 1974-08-15 1975-08-15 Control and method for defrosting regrigeration systems

Country Status (5)

Country Link
BR (1) BR7505229A (en)
CA (1) CA1041782A (en)
DE (1) DE2536398C3 (en)
FR (1) FR2288957A1 (en)
GB (1) GB1524366A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994020803A1 (en) * 1993-03-08 1994-09-15 Greenhalgh Refrigeration Pty Ltd Refrigeration process and apparatus
EP2105685A1 (en) * 2007-01-17 2009-09-30 Daikin Industries, Ltd. Refrigerating apparatus

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4151723A (en) * 1977-07-15 1979-05-01 Emhart Industries, Inc. Refrigeration system control method and apparatus
US4184341A (en) * 1978-04-03 1980-01-22 Pet Incorporated Suction pressure control system
DE2850198A1 (en) * 1978-11-18 1980-05-29 Hamadeh Deicing control for refrigerator plant - has heating elements controlled in groups with temp. sensor cut=out to minimise energy consumed
FR2519746A1 (en) * 1982-01-08 1983-07-18 Bonnet Ets DEFROSTING PROGRAMMER OF A REFRIGERATED MULTI-POSITION FACILITY
DE3277128D1 (en) * 1982-09-30 1987-10-08 Kurt Thalheimer Cold store
DE4318671A1 (en) * 1993-06-04 1994-12-08 Linde Ag Method for operating a (composite) refrigeration system and (composite) refrigeration system for operating this method
DE4330925C2 (en) * 1993-09-13 1997-03-20 Loh Kg Rittal Werk Cooling device for a control cabinet or an electronics housing with anti-icing device
AT402026B (en) * 1994-09-29 1997-01-27 Gossler Ewald METHOD AND DEVICE FOR COOLING GASES

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3234753A (en) * 1963-01-03 1966-02-15 Lester K Quick Hot gas refrigeration defrosting system
CA844775A (en) * 1967-11-09 1970-06-16 H. Ting Youn Defrost control apparatus
US3464226A (en) * 1968-02-05 1969-09-02 Kramer Trenton Co Regenerative refrigeration system with means for controlling compressor discharge
US3756037A (en) * 1972-01-21 1973-09-04 Dole Refrigerating Co Immersion means for electrically defrosting refrigeration plates

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994020803A1 (en) * 1993-03-08 1994-09-15 Greenhalgh Refrigeration Pty Ltd Refrigeration process and apparatus
EP2105685A1 (en) * 2007-01-17 2009-09-30 Daikin Industries, Ltd. Refrigerating apparatus
EP2105685A4 (en) * 2007-01-17 2014-09-24 Daikin Ind Ltd Refrigerating apparatus

Also Published As

Publication number Publication date
DE2536398C3 (en) 1981-03-26
BR7505229A (en) 1976-08-03
CA1041782A (en) 1978-11-07
FR2288957A1 (en) 1976-05-21
FR2288957B1 (en) 1980-04-25
DE2536398B2 (en) 1980-08-07
DE2536398A1 (en) 1976-03-04

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee
PCPE Delete 'patent ceased' from journal

Free format text: NO.4907,PAGE 907

PCNP Patent ceased through non-payment of renewal fee