JPS57137691A - Operating turbo refrigerator - Google Patents

Operating turbo refrigerator

Info

Publication number
JPS57137691A
JPS57137691A JP2156981A JP2156981A JPS57137691A JP S57137691 A JPS57137691 A JP S57137691A JP 2156981 A JP2156981 A JP 2156981A JP 2156981 A JP2156981 A JP 2156981A JP S57137691 A JPS57137691 A JP S57137691A
Authority
JP
Japan
Prior art keywords
pressure
switching
high speed
side clutch
auxiliary relay
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.)
Pending
Application number
JP2156981A
Other languages
Japanese (ja)
Inventor
Kazumi Suzuki
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP2156981A priority Critical patent/JPS57137691A/en
Publication of JPS57137691A publication Critical patent/JPS57137691A/en
Pending 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Positive-Displacement Air Blowers (AREA)

Abstract

PURPOSE:To make manual switching possible only when the difference between the condensation pressure and the evaporation pressure is below that of the prescribed seitch pressure and to enable appropriate running with respect to operating conditions. CONSTITUTION:Because the pressure difference switch 14 is closed when the pressure is less than the prescribed pressure for switching, the auxiliary relay for high speed side clutch connection 17 is excited, and the auxiliary relay for low speed side clutch connection 18 is erased by the operation of the push button switch for manual high speed operation 19 and the electromagnetic valve 10 for lowspeed side clutch connection opens. At the same time, the electromagnetic valve 11 for high speed side clutch operates to enable the switching from lowspeed running to high speed running. In this case, when the said pressure difference reach the set switching pressure of the pressure difference switch 14, both the a contact 16a1 and the b contact 16b closes by erasure of the auxiliary relay 16 for pressure difference switch, the auxiliary relay 15 for manual switching is erased, the a contact 15a is closed, and thus manual switching is prevented.
JP2156981A 1981-02-18 1981-02-18 Operating turbo refrigerator Pending JPS57137691A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2156981A JPS57137691A (en) 1981-02-18 1981-02-18 Operating turbo refrigerator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2156981A JPS57137691A (en) 1981-02-18 1981-02-18 Operating turbo refrigerator

Publications (1)

Publication Number Publication Date
JPS57137691A true JPS57137691A (en) 1982-08-25

Family

ID=12058653

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2156981A Pending JPS57137691A (en) 1981-02-18 1981-02-18 Operating turbo refrigerator

Country Status (1)

Country Link
JP (1) JPS57137691A (en)

Similar Documents

Publication Publication Date Title
JPS57137691A (en) Operating turbo refrigerator
JPS57176384A (en) Compressor
JPS51133631A (en) Dash pot
JPS5324157A (en) Control circuit of air conditioner
JPS54132854A (en) Two-door refrigerator
JPS55153886A (en) Oil-cooled compressor
JPS56135774A (en) Refrigerating apparatus
JPS5656549A (en) Control circuit for air conditioner
JPS56162228A (en) Control system for two axle type gas turbine
JPS5499207A (en) Controlling system for prevention from surging in blower
JPS5561291A (en) Driving device by motor
JPS5575148A (en) Multiple type air conditioner
JPS57181974A (en) Idle running device of water turbine or pump-turbine
JPS5538461A (en) Air conditioning equipment
JPS5599540A (en) Air conditioner
JPS54134861A (en) Refrigerating open show case
JPS5442535A (en) Air fuel ratio changer for electronically controlled fuel injection engine
JPS5677636A (en) Automatic ventilating apparatus
JPS5650287A (en) Pump device
JPS5561289A (en) Driving device by motor
JPS57126559A (en) Ignition time controlling device
JPS56146087A (en) Compressor of air conditioner for car
JPS55156712A (en) Controller for vehicle cooling apparatus
JPS54116768A (en) Bi-temperatural refrigerator
JPS5681284A (en) Overflow preventing device for water supply pump