Low refrigerant charge detecting device

Details Low refrigerant charge detecting device Low refrigerant charge detecting device

1987-05-11

1988-05-24

Tanner, Harry B.

Refrigeration

With indicator or tester

Condition sensing

62209, G01K 1300

Patent

active

047457651

ABSTRACT:
A low refrigerant charge detecting device comprises a refrigerant superheat temperature transducer that senses refrigerant leaving the evaporator and provides a positional output indicative of the superheat temperature of the sensed refrigerant, an ambient air temperature transducer that senses ambient air and provides a positional output indicative of the ambient air temperature, and a low charge signal effecter that responds to both the positional outputs and provides a low charge signal at predetermined refrigerant superheat and ambient air temperatures.

REFERENCES:
patent: 2621487 (1952-12-01), Warren
patent: 3047696 (1962-07-01), Heidorn
patent: 3303663 (1967-02-01), Miller et al.
patent: 3400552 (1968-09-01), Johnson et al.
patent: 3729949 (1973-05-01), Talbot
patent: 4106306 (1978-08-01), Saunders

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