Automotive refrigeration system

Details Automotive refrigeration system Automotive refrigeration system

1982-07-16

1984-10-16

Wayner, William E.

Refrigeration

Automatic control

Refrigeration producer

623234, 417310, F25B 100

Patent

active

044766920

ABSTRACT:
A refrigeration system for use in an automotive air conditioning system has a vane type variable displacement refrigerant compressor drivingly connectable by an electromagnetic clutch to an automotive engine and a refrigerant evaporator through which air is caused to flow by a blower. 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 or ports. The air temperature just downstream of the evaporator 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 or ports are selectively opened to vary the compressor displacement to provide a multistage compressor displacement control. The electric circuit is also operative to control the electromagnetic clutch to selectively connect and disconnect the compressor to and from the engine.

REFERENCES:
patent: 2556882 (1951-06-01), Minkler et al.
patent: 3495418 (1970-02-01), Kapich
patent: 4068981 (1978-01-01), Mandy
patent: 4152902 (1979-05-01), Lush
patent: 4342199 (1982-08-01), Shaw et al.

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