Measuring evaporator load in an automotive air conditioning syst

Details Measuring evaporator load in an automotive air conditioning syst Measuring evaporator load in an automotive air conditioning syst

1992-06-11

1993-06-15

Tanner, Harry B.

Refrigeration

Automatic control

Refrigeration producer

62157, F25B 100

Patent

active

052188361

ABSTRACT:
An electronic controller receives an evaporator inlet (or outlet) temperature sensor signal and measures the time required for the evaporator to be heated from compressor clutch cut-out to compressor clutch "ON". Depending upon the elapsed time, the controller selects from a predetermined schedule, a new value CLHOFF of the evaporator inlet temperature at which the compressor is next cut-out, raising CLHOFF for lighter thermal loading to prevent evaporator icing and freeze-up and lowering CLHOFF for heavy thermal loading to prevent unwanted compressor cycling.

REFERENCES:
patent: 4856293 (1989-08-01), Takahashi
patent: 5117646 (1992-06-01), Nose et al.

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