Title:
CONTROL DEVICE FOR AIR CONDITIONER FOR MOTOR VEHICLE
Document Type and Number:
Japanese Patent JPS6268115
Kind Code:
A
Abstract:
PURPOSE:To stabilize refrigeration cycle even when a compressor is in a capacity control condition by controlling the opening of an expansion valve in a stepped manner according to the liquid level of an accumulator thereby maintaining the liquid level of the accumulator within a specified range. CONSTITUTION:Gas-state refrigerant of high temperature and high pressure discharged from a compressor 21 is condensed in a condenser 22 to become liquid-state refrigerant which is decompressed through an electronic expansion valve 23 to become gas-liquid mixed refrigerant, and then evaporates in an evaporator 24 while exchanging heat with room air. The mixed-state refrigerant goes from the evaporator 24 to an accumulator 25 where liquid-state refrigerant is stored and gas-state refrigerant is returned to the compressor 21. In the above device, detected result from a liquid level sensor 26 is inputted to a liquid level decision unit 27 to decide if the detected result is within a specified range. Based on the decision result from the liquid level decision unit 27, the opening of the electronic expansion valve 23 is controlled by means of a control unit 28.
Inventors:
TAGUCHI YUKIHIKO
Application Number:
JP20627085A
Publication Date:
March 28, 1987
Filing Date:
September 20, 1985
Export Citation:
Assignee:
SANDEN CORP
International Classes:
F25B1/00; B60H1/32; F25B41/06; F25B43/00; G05D9/12; (IPC1-7): B60H1/32; F25B1/00
Attorney, Agent or Firm:
Ashida Tan
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