GB518055A - Improvements in or relating to refrigerating apparatus - Google Patents

Improvements in or relating to refrigerating apparatus

Info

Publication number
GB518055A
GB518055A GB31951/38A GB3195138A GB518055A GB 518055 A GB518055 A GB 518055A GB 31951/38 A GB31951/38 A GB 31951/38A GB 3195138 A GB3195138 A GB 3195138A GB 518055 A GB518055 A GB 518055A
Authority
GB
United Kingdom
Prior art keywords
switch
pressure
contacts
bell
low
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
GB31951/38A
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.)
CBS Corp
Original Assignee
Westinghouse Electric and Manufacturing Co
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 Westinghouse Electric and Manufacturing Co filed Critical Westinghouse Electric and Manufacturing Co
Publication of GB518055A publication Critical patent/GB518055A/en
Expired legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A22—BUTCHERING; MEAT TREATMENT; PROCESSING POULTRY OR FISH
    • A22B—SLAUGHTERING
    • A22B5/00—Accessories for use during or after slaughtering
    • A22B5/06—Slaughtering stands or spreaders for cattle
    • A—HUMAN NECESSITIES
    • A22—BUTCHERING; MEAT TREATMENT; PROCESSING POULTRY OR FISH
    • A22C—PROCESSING MEAT, POULTRY, OR FISH
    • A22C17/00—Other devices for processing meat or bones
    • A22C17/02—Apparatus for holding meat or bones while cutting
    • 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
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F25B49/025—Motor control arrangements
    • 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
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/19—Pressures
    • F25B2700/193—Pressures of the compressor
    • F25B2700/1931—Discharge pressures
    • 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
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/19—Pressures
    • F25B2700/193—Pressures of the compressor
    • F25B2700/1933—Suction pressures
    • 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
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2104—Temperatures of an indoor room or compartment
    • 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
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2117—Temperatures of an evaporator

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Food Science & Technology (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Air Conditioning Control Device (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

Abstract

518,055. Regulating air &c. compressors. WESTINGHOUSE ELECTRIC & MANUFACTURING CO. Nov. 4, 1938, No. 31951. Convention date, Nov. 5, 1937. [Class 8 (i)] [Also in Groups XIII and XXXVII] In compression refrigerating apparatus a control means responsive to a predetermined high difference in pressure between the high and low pressure sides renders the compressor motor incapable of being started and permits it to operate, once it is started, independently of the pressure difference, thus dispensing with the use of an unloader. As shown applied to a system for cooling air forced over the evaporator 10 by a fan 24, bellows 27, 28 connected by pipes 29, 31 to the high and low pressure sides 16, 15 respectively operate bell-crank levers 48, 42. A movable contact 54 carried by a support 56 connected to the bell-crank 48 is adapted to engage a movable contact 55 carried by a spring 57 on a lever 58 one end 59 of which is held in engagement with the bell-crank 42 by a spring 61. The contacts 54, 55 are separated when the pressure differential between the high and low pressure sides exceeds a predetermined value and break a low voltage circuit between lines' L1, L2 which includes a relay 64 and a normally closed snap switch 34 operated by the bellows 27, 28 through the bell-cranks 48, 42 lost-motion connections 46, 43, a pivoted arm 32 and a spring 33. In operation, with the switch 34 and contacts 54, 55 closed as shown a master switch 72 is closed by a thermostatic control when the temperature of the air being treated has increased to a predetermined value and energizes the relay 64 to close the switch 66 of the compressor motor 13 and a switch 67 shortcircuiting the contacts 54, 55. During the running period the contacts 54, 55 separate due to the rising pressure difference and the switch 34 will be opened to stop the compressor in response to abnormally high condenser pressure and abnormally low evaporating pressure. When the temperature of the air reaches a predetermined low value the switch 72 is opened, and during the inactive period the contacts 54, 55 remain separated preventing starting of the compressor, until the pressure difference has been lowered to the predetermined value. The system may thus be operated without an unloading device and the capacity of the motor need not be above that necessary for the running operation.
GB31951/38A 1937-11-05 1938-11-04 Improvements in or relating to refrigerating apparatus Expired GB518055A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US172881A US2218944A (en) 1937-11-05 1937-11-05 Refrigerating apparatus

Publications (1)

Publication Number Publication Date
GB518055A true GB518055A (en) 1940-02-15

Family

ID=22629584

Family Applications (1)

Application Number Title Priority Date Filing Date
GB31951/38A Expired GB518055A (en) 1937-11-05 1938-11-04 Improvements in or relating to refrigerating apparatus

Country Status (5)

Country Link
US (1) US2218944A (en)
CH (1) CH208233A (en)
DE (1) DE695391C (en)
FR (1) FR845348A (en)
GB (1) GB518055A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1029013B (en) * 1956-02-17 1958-04-30 Carrier Corp Cooling system

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2521247A (en) * 1941-01-13 1950-09-05 Honeywell Regulator Co Control of refrigeration
US2998707A (en) * 1960-03-22 1961-09-05 Westinghouse Electric Corp Control apparatus and method for heat pumps
US3110160A (en) * 1963-01-03 1963-11-12 Trane Co Refrigeration system control
US3435628A (en) * 1967-05-02 1969-04-01 Penn Controls Pressure responsive safety control for motor driven compressor
US4311497A (en) * 1978-03-06 1982-01-19 Robertshaw Controls Company Method and apparatus for heat pump system protection
US4220013A (en) * 1978-06-05 1980-09-02 Borg-Warner Corporation Pressure compensated control for air conditioning system or heat pump
US4221116A (en) * 1978-06-05 1980-09-09 Borg-Warner Corporation Temperature compensated control for air conditioning system or heat pump
JP5162158B2 (en) * 2007-05-31 2013-03-13 株式会社日立産機システム Scroll pressure booster
DE102021211728A1 (en) 2021-10-18 2023-04-20 Volkswagen Aktiengesellschaft Operation of an electric compressor with optimized starting current

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1029013B (en) * 1956-02-17 1958-04-30 Carrier Corp Cooling system

Also Published As

Publication number Publication date
US2218944A (en) 1940-10-22
DE695391C (en) 1940-08-23
FR845348A (en) 1939-08-18
CH208233A (en) 1940-01-15

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