Heat pump system defrost control system with override

Details Heat pump system defrost control system with override Heat pump system defrost control system with override

1981-06-30

1983-10-04

Makay, Albert J.

Refrigeration

With indicator or tester

Operatively correlated with automatic control

62140, 62155, F25D 2102, F25D 2106

Patent

active

044071388

ABSTRACT:
A defrost control system for a reverse cycle refrigeration system wherein the outdoor coil is defrosted as a function of the operation of a demand type control for initiating the defrost mode of operation. The control system further includes a means for monitoring the frequency of defrost cycles. If too frequent defrosting is detected then the demand system is overriden and subsequent defrosting occurs only after the heat pump has been operating in the normal heating mode of operation for a predetermined length of time.

REFERENCES:
patent: 3312081 (1967-04-01), Berger et al.
patent: 4209994 (1980-07-01), Mueller et al.
patent: 4299095 (1981-11-01), Cassarino
patent: 4327556 (1982-05-01), Zampini et al.

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