Système frigorifique comportant une modulation de puissance

Kühlsystem mit Leistungsregulierung

Refrigeration system including capacity modulation

Abstract

A refrigeration system adapted particularly for a vehicle air conditioning system and including a capacity modulation mechanism. A portion of the liquid refrigerant at the outlet of the condenser (18) is fed back to the suction chamber (106) of the compressor through the orifice (130) of a bypass valve (30). The valve is mounted on the compressor and is responsive to suction chamber pressure. As the evaporator temperature decreases, suction chamber pressure also decreases thereby opening the valve to meter a small amount of bypassed liquid refrigerant into the suction chamber of the compressor. A portion of the hot discharge gas may also be bypassed back into the suction chamber through the same valve (30) that meters the bypassed liquid refrigerant.

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Patent Citations (7)

    Publication numberPublication dateAssigneeTitle
    EP-0087838-A1September 07, 1983Grasso's Koninklijke Machinefabrieken N.V.Capacity control valve for a compressor
    US-2363273-ANovember 21, 1944Buensod Stacey IncRefrigeration
    US-2949128-AAugust 16, 1960American Radiator & StandardValve
    US-3360952-AJanuary 02, 1968Trane CoCapacity controlled refrigeration system
    US-3631684-AJanuary 04, 1972Ranco IncStep-by-step control of refrigerant return in a compressor-condenser-expander system
    US-4300357-ANovember 17, 1981The Singer CompanyBy-pass valve for automotive air conditioning system
    US-4462219-AJuly 31, 1984Tokyo Shibaura Denki Kabushiki KaishaRefrigeration system

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    Publication numberPublication dateAssigneeTitle