High-low superheat protection for a refrigeration system compres

Details High-low superheat protection for a refrigeration system compres High-low superheat protection for a refrigeration system compres

1984-04-06

1985-07-09

Wayner, William E.

Refrigeration

Automatic control

Refrigeration producer

62225, F25B 4100

Patent

active

045273995

ABSTRACT:
A method and control system are disclosed for operating a refrigeration system to protect the refrigeration system compressor from adverse operating conditions. A first signal indicative of the saturation temperature of the refrigerant in an evaporator of the refrigeration system, and a second signal indicative of the temperature of gaseous refrigerant flowing from the evaporator to the compressor of the refrigeration system compressor, are provided to a microcomputer system which processes the first and second signals to determine the superheat of the gaseous refrigerant flowing to the compressor. The microcomputer system generates an alarm signal to shut down operation of the refrigeration system if the detected superheat is less than a lower limit or greater than an upper limit of a normal range of superheat values.

REFERENCES:
patent: 3577743 (1971-05-01), Long
patent: 3686892 (1972-08-01), Bassett, Jr.
patent: 3913347 (1975-10-01), Stevens
patent: 4167858 (1979-09-01), Kojima et al.
patent: 4265091 (1981-05-01), Kobayashi

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