Controller for electrically driven expansion valve of refrigerat

Details Controller for electrically driven expansion valve of refrigerat Controller for electrically driven expansion valve of refrigerat

1991-06-27

1992-10-27

Rivell, John

Refrigeration

Automatic control

Refrigeration producer

62225, F25B 4100

Patent

active

051579340

ABSTRACT:
A valve controller which controls the opening degree of an electrically driven expansion valve mounted in the refrigerating cycle, in accordance with a difference between a refrigerant saturation temperature of an outdoor heat exchanger detected with a first temperature sensor and a refrigerant temperature at the suction port of a compressor detected with a second temperature sensor. A sensor error correcting unit is provided whereby a detected temperature error is calculated in accordance with the outputs of the first and second temperature sensors exposed in an atmospheric air having a specific temperature, and in accordance with the detected temperature error, a difference between the refrigerant saturation temperature and the refrigerant temperature at the suction port of the compressor is corrected.

REFERENCES:
patent: 4375753 (1983-03-01), Imasu et al.
patent: 4527399 (1985-07-01), Lord
patent: 4617804 (1986-10-01), Fukushima et al.
patent: 4848099 (1989-07-01), Beckey et al.

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