Refrigeration – With indicator or tester – Operatively correlated with automatic control
Patent
1987-08-13
1989-07-18
Tanner, Harry B.
Refrigeration
With indicator or tester
Operatively correlated with automatic control
62129, 622283, F25B 4900
Patent
active
048480967
ABSTRACT:
A refrigeration systems diagnoses its pressure sensors by turning the system off, determining whether the pressure sensors on the high-pressure-side and on the low-pressure-side of a refrigeration circuit detect unvarying pressures, and comparing the pressure values detected by a high pressure sensor and a low pressure sensor with each other. The high pressure sensor or the low pressure sensor is regarded as defective when the difference between the two pressures detected falls outside a tolerance range. In one embodiment an analyzer compares the pressures to produce a signal indicating failure when the pressure difference falls outside the tolerance range.
REFERENCES:
patent: 4106306 (1978-08-01), Saunders
patent: 4122720 (1978-10-01), Podl
patent: 4337516 (1982-06-01), Murphy et al.
patent: 4381549 (1983-04-01), Stamp, Jr. et al.
patent: 4602484 (1986-07-01), Bendikson
patent: 4653280 (1987-03-01), Hansen et al.
Funahashi Nobuhiro
Yamashita Toshio
Mitsubishi Jukogyo K.K.
Tanner Harry B.
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