Control system for refrigerating apparatus

Details Control system for refrigerating apparatus Control system for refrigerating apparatus

1992-10-19

1993-07-06

Tanner, Harry B.

Refrigeration

Automatic control

Refrigeration producer

621963, 62222, F25B 4104

Patent

active

052243540

ABSTRACT:
There is disclosed a control system for controlling a refrigerating apparatus in which a control unit is arranged to calculate a super heat amount of a discharge gas of a compressor at the time immediately before starting operation of the compressor, on the basis of a difference between temperatures detected by a discharge gas temperature sensor and a condenser temperature sensor and to control an opening degree of an electronic expansion valve to a completely open state. After starting operation of the compressor, the control unit constantly measures the super heat amount of the discharge gas and controls the valve opening degree to the usual degree when the super heat amount becomes higher than the preset value.

REFERENCES:
patent: 4261180 (1981-04-01), Nozawa et al.
patent: 4441331 (1984-04-01), Yuyama
patent: 4620424 (1986-11-01), Tanaka et al.
patent: 4910968 (1990-03-01), Yamashita et al.

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