Heat pump monitor apparatus for fault detection in a heat pump s

Details Heat pump monitor apparatus for fault detection in a heat pump s Heat pump monitor apparatus for fault detection in a heat pump s

1984-05-07

1986-03-11

Cline, William R.

Heat exchange

Regenerator

Checker brick structure

165 12, 165 29, 62129, 62231, 236 94, 364184, 364557, F25B 1300, G10M 1900, G05D 2300

Patent

active

045748713

ABSTRACT:
A fault detection apparatus which monitors a heat pump system used for maintaining a selected temperature in an enclosed space is disclosed. The apparatus includes measuring the run time for a heat pump compressor, ascertaining the status of the heat pump reversing valve, measuring the run time of an auxiliary heating unit, measuring the run time of the defrost cycle of the heat pump, and sensing outdoor temperature. The compressor, the auxiliary heating unit, and the defrost cycle run times are each compared with their respective expected run times for the outdoor temperature sensed and for a known heat loss rate for the enclosed space. The apparatus will send out an alarm signal when the heat pump system fails to operate within the expected parameters.

REFERENCES:
patent: 4102389 (1978-07-01), Wills
patent: 4217761 (1980-08-01), Cornaire et al.
patent: 4232530 (1980-11-01), Mueller
patent: 4234927 (1980-11-01), First
patent: 4246763 (1981-01-01), Mueller et al.
patent: 4262736 (1981-04-01), Gilkeson et al.
patent: 4274475 (1981-06-01), Rall et al.
patent: 4301660 (1981-11-01), Mueller et al.
patent: 4381549 (1983-04-01), Stamp, Jr. et al.
patent: 4432232 (1984-02-01), Brantley et al.
patent: 4510576 (1985-04-01), MacArthur et al.

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