Air-conditioning apparatus

Details Air-conditioning apparatus Air-conditioning apparatus

1994-11-28

1999-03-09

Ford, John K.

Heat exchange

With timer, programmer, time delay, or condition responsive...

Having heating and cooling capability

62160, 622386, 622387, 62199, 62510, 621962, 237 2B, F25B 2900

Patent

active

058788107

ABSTRACT:
An air-conditioning apparatus forms a refrigerating cycle with a refrigerant heater and a compressor having two cylinders. The apparatus simultaneously carries out a refrigerant heating operation and a heat pump operation when a required heating capacity is high, and when the required heating capacity is low, only the heat pump operation. This operation technique helps reduce the size of the apparatus and expand a variable width of heating capacity. The apparatus also has a defrosting unit for defrosting an outdoor heat exchanger during the heat pump operation.

REFERENCES:
patent: 2181053 (1939-11-01), Hamilton
patent: 3859814 (1975-01-01), Grant
patent: 4311192 (1982-01-01), Vandervaart
patent: 4622828 (1986-11-01), Fujiwara et al.
patent: 5050233 (1991-09-01), Hitosugi et al.
patent: 5088296 (1992-02-01), Hamaoka

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