Refrigeration – Automatic control – Refrigeration producer
Patent
1984-04-24
1985-07-30
Wayner, William E.
Refrigeration
Automatic control
Refrigeration producer
622285, F25B 4104
Patent
active
045313784
ABSTRACT:
A refrigeration system for use in an automotive air conditioning system has a variable displacement refrigerant compressor drivingly connectable by an electromagnetic clutch to an automotive engine, a refrigerant evaporator through which air is caused to flow by a blower, and a throttling valve which prevents the refrigerant pressure in the evaporator from lowering over the predetermined pressure, so that frost or icing is not formed on the evaporator fins.
The compressor is provided with one or two unloading ports for releasing the refrigerant being compressed and with a valve member or members associated with the unloading port. The operation of the throttling valve is detected by a sensor which emits a signal to an electric circuit for actuating the valve member or members so that the unloading port is selectively or gradually opened to vary the compressor displacement to provide a multi-stage or continuous compressor.
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Nishi Yasuyuki
Sakurai Masao
Takagi Masasi
Nippondenso Co. Ltd.
Wayner William E.
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