Control device for refrigeration cycle

Details Control device for refrigeration cycle Control device for refrigeration cycle

1983-08-24

1985-02-19

Tanner, Harry B.

Refrigeration

Automatic control

Refrigeration producer

62197, 62225, 621963, 62160, 62158, F25B 4104, F25B 1300

Patent

active

044997396

ABSTRACT:
A control device for refrigeration cycle constructed with a compressor, a condenser, an electrically operated expansion valve, an evaporator, and so forth, all being connected in series, wherein there are further provided a by-pass extending from an inlet or an outlet or both of the expansion valve upto an inlet of the compressor through a capillary tube; a first temperature sensor to sense a temperature of a cooling medium at the inlet of the compressor; a second temperature sensor to sense a temperature of the cooling medium within an intake tubing, through which the cooling medium is taken into the inlet of the compressor; and a control device which calculates a super-heat quantity of the cooling medium taken into the compressor on the basis of a difference between the detection outputs of the first and second temperature sensors, and controls a degree of opening of the electrically operated expansion valve, thereby enabling the refrigeration cycle to be operated at high efficiency and in an energy-saving mode.

REFERENCES:
patent: 3264837 (1966-08-01), Harnish
patent: 4055963 (1977-11-01), Shoji et al.
patent: 4122688 (1978-10-01), Mochizuki et al.
patent: 4326868 (1982-04-01), Ozu et al.
patent: 4362027 (1982-12-01), Barbier

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