Air conditioning compressor unloading control system

Details Air conditioning compressor unloading control system Air conditioning compressor unloading control system

1982-08-09

1985-03-26

Wayner, William E.

Refrigeration

Automatic control

Diverse, cascade or compound refrigeration-producing system

622285, 417298, F25B 700, F04B 4900

Patent

active

045065179

ABSTRACT:
The pumping capacity of an unloadable air conditioning compressor is switched between full and part capacity states. The part capacity state is established during on/off cycling of the compressor, and air conditioning load conditions are sensed during operation of the compressor to control capacity switching in a manner to provide efficient and responsive performance. Refrigerant pressure at the evaporator outlet is used to control on/off cycling as well as capacity cycling, and the rate of decrease of such pressure is used as an indication of the air conditioning load.

REFERENCES:
patent: 3303988 (1967-02-01), Weatherhead
patent: 4356704 (1982-11-01), Izumi et al.
patent: 4391242 (1983-07-01), Mashio

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