GB1038536A - Refrigeration system - Google Patents

Refrigeration system

Info

Publication number
GB1038536A
GB1038536A GB2045564A GB2045564A GB1038536A GB 1038536 A GB1038536 A GB 1038536A GB 2045564 A GB2045564 A GB 2045564A GB 2045564 A GB2045564 A GB 2045564A GB 1038536 A GB1038536 A GB 1038536A
Authority
GB
United Kingdom
Prior art keywords
evaporator
valves
header
valve
lines
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
GB2045564A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB2045564A priority Critical patent/GB1038536A/en
Publication of GB1038536A publication Critical patent/GB1038536A/en
Expired legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B6/00Compression machines, plants or systems, with several condenser circuits
    • F25B6/04Compression machines, plants or systems, with several condenser circuits arranged in series
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B47/00Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02Defrosting cycles
    • F25B47/022Defrosting cycles hot gas defrosting
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B5/00Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
    • F25B5/02Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in parallel
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00General 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
    • F25B2400/22Refrigeration systems for supermarkets

Landscapes

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

Abstract

1,038,536. Refrigerating; defrosting. L. K. QUICK. May 15, 1964, No. 20455/64. Heading F4H. In a compression-condensation refrigeration system having a plurality of evaporators means are provided for selectively conveying hot gaseous refrigerant from the compressor to any evaporator and for conveying the refrigerant used to defrost that evaporator to another evaporator for evaporation therein. As shown, the refrigeration system comprises compressors 210, 211, an air-cooled condenser 215, a watercooled condenser 232, a liquid line header 240, evaporators 241, 251 ... 291 and suction line headers 301 and 302. Valve controlled hot gas lines 247, 257 ... 297 lead from a header 311 to the outlets of the evaporators and lines 248, 258 . . . 298 serve to convey refrigerant used to defrost the evaporators from the inlet sides of the latter to a header 312. In the inlet lines 243, 253 ... 293 to the evaporation there are provided thermostatic expansion valves 244, 254 ... 294 and on-off valves 242, 252 ... 292 which are closed when the temperature in the fixture in which the associated evaporator is positioned reaches a predetermined low value, the lines 248 ... 298 being connected to the evaporator inlet lines between these valves. Valves 244 ... 294 are provided with by-pass lines 313 including check valves 314. In operation, evaporator 241, for example, is defrosted by opening valve 249 in line 247 and valve 250 in line 248 and closing a valve 246 downstream of the evaporator and valve 242 in the evaporator inlet line, refrigerant used in defrosting evaporator 241 being supplied to header 312 increasing the pressure therein. Valves 250, 260 ... 290 in lines 248 ... 298 are so constructed as to permit flow from the evaporators to the header 312 only when they are opened by a solenoid but to permit flow in the reverse direction when the pressure difference between the header and the evaporator reaches a predetermined value. Thus, when the pressure in an evaporator drops due to the closure of any of valves 242 ... 292 refrigerant from the header is forwarded to that evaporator for evaporation. Evaporator 271, however, is positioned in a fixture in which the temperature must not drop below a predetermined minimum and so a check valve 330 is provided in line 278 to prevent refrigerant from entering the evaporator when valve 272 is closed. If none of the valves 242 ... 292 is closed during defrosting of evaporator 241 a device 333 is arranged to close valves 252 and 262 in response to an increased pressure in header 312. The system includes an oil separator 213 with an associated receiver 221 from which refrigerant is returned to the system through line 222 and oil is returned to the compressors through lines 223 and 224 having float controlled valves 225 and 227 respectively. A cooler 218 between the compressor stages is cooled by the admission of refrigerant from liquid header 240 via an expansion valve 310. The defrosting operation is under time control. In a modification (Fig. 1, not shown) the header 312 is omitted and two evaporators are shown, the inlet lines of the evaporators being connected by two lines each of which includes an on-off valve and a check valve. Thus, refrigerant used in defrosting one evaporator can be passed to the inlet of the other by opening the appropriate on-off valve. An electric circuit for opening and closing the valves of the system under the control of timing means 3 and for energizing electric drain heaters is illustrated in Fig. 2 (not shown).
GB2045564A 1964-05-15 1964-05-15 Refrigeration system Expired GB1038536A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2045564A GB1038536A (en) 1964-05-15 1964-05-15 Refrigeration system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2045564A GB1038536A (en) 1964-05-15 1964-05-15 Refrigeration system

Publications (1)

Publication Number Publication Date
GB1038536A true GB1038536A (en) 1966-08-10

Family

ID=10146242

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2045564A Expired GB1038536A (en) 1964-05-15 1964-05-15 Refrigeration system

Country Status (1)

Country Link
GB (1) GB1038536A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2167543A (en) * 1984-11-26 1986-05-29 Sanden Corp Refrigerated display cabinet
US4959968A (en) * 1988-03-17 1990-10-02 Sanden Corporation Method for controlling the defrosting of refrigerator-freezer units of varying degrees of frost accumulation
EP1577624A2 (en) * 2004-03-15 2005-09-21 Stanislav Mach A heat pump

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2167543A (en) * 1984-11-26 1986-05-29 Sanden Corp Refrigerated display cabinet
US4644758A (en) * 1984-11-26 1987-02-24 Sanden Corporation Refrigerated display cabinet
US4959968A (en) * 1988-03-17 1990-10-02 Sanden Corporation Method for controlling the defrosting of refrigerator-freezer units of varying degrees of frost accumulation
US4989413A (en) * 1988-03-17 1991-02-05 Sanden Corporation Method for controlling the defrosting of refrigerator-freezer units of varying degrees of frost accumulation
EP1577624A2 (en) * 2004-03-15 2005-09-21 Stanislav Mach A heat pump
EP1577624A3 (en) * 2004-03-15 2006-12-27 Stanislav Mach A heat pump

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