Multiple compressor heat pump with coordinated defrost

Details Multiple compressor heat pump with coordinated defrost Multiple compressor heat pump with coordinated defrost

1978-03-24

1979-06-12

King, Lloyd L.

Refrigeration

Processes

Defrosting or frost inhibiting

62160, 62324, 62335, 62510, F25B 4100, F25B 1300, F25B 700, F25B 110

Patent

active

041576497

ABSTRACT:
A method and apparatus for controlling a multiple compressor heat pump system such that when the system is in the heating mode of operation the compressors are cycled individually depending upon the ambient temperature level and are individually co-ordinately operated in a defrost mode. The electrical control means disclosed provides for a second compressor being energized when the outdoor heat exchanger of a first compressor is being defrosted and the first and second contact means located within the individual defrost circuits for the first and second outdoor heat exchangers such that when the first outdoor heat exchanger is being defrosted the second outdoor heat exchanger may not commence a defrost cycle and when the second compressor is being operated in a defrost cycle a first compressor may not commence a defrost cycle.

REFERENCES:
patent: 2241060 (1941-05-01), Gibson
patent: 2692481 (1954-10-01), Schweller
patent: 2796743 (1957-06-01), McFarlan
patent: 3750415 (1973-08-01), Peuchen et al.
patent: 4040268 (1977-08-01), Howard

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