Inventors:
Glenn E. Tomasov - Lockport NY
Annette M. Schmidt - Amherst NY
Assignee:
General Motors Corporation - Detroit MI
International Classification:
F25B 100
Abstract:
In an air conditioning system, thermistors measure evaporator inlet and outlet temperatures and compressor body temperature. When the differential between inlet and outlet temperatures is below a first threshold and the compressor temperature is above a second threshold, very low refrigerant charge is indicated and the compressor is turned off. Also, if compressor temperature reaches a critical value, the compressor is turned off regardless of the temperature differential across the evaporator.