Refrigeration – Automatic control – Selective heating or cooling
Patent
1982-03-05
1983-10-18
King, Lloyd L.
Refrigeration
Automatic control
Selective heating or cooling
622386, 622387, 623241, 623244, F25B 1300, F25B 2702
Patent
active
044097964
ABSTRACT:
A reversible mode heating and cooling system comprises a conventional reversible heat pump unit having a compressor, a reversible valve, an indoor heat exchanger in heat exchange relationship with indoor ambient air, refrigerant expansion means and an outdoor heat exchanger in heat exchange relationship with outdoor ambient air, and operatively associated therewith, an auxiliary heat exchanger in heat exchange relationship with a heat exchange fluid for enhancing the capacity and efficiency of the system to evaporate refrigerant during the heating mode and to condense refrigerant during the cooling mode. The auxiliary heat exchanger is arranged for selective parallel or simultaneous parallel and series flow of refrigerant through the auxiliary heat exchanger and the outdoor heat exchanger to enhance the heating efficiency of the system at very low outdoor ambient temperatures and the cooling efficiency of the system at very high outdoor ambient temperatures. A temperature sensing and flow control subsystem is operatively associated with the heating and cooling system to sense refrigerant temperatures at selected locations and to operate refrigerant and heat transfer fluid flow control valves to most efficiently and effectively direct refrigerant flow to the outdoor and/or auxiliary heat exchangers.
REFERENCES:
patent: 3563304 (1971-02-01), McGrath
patent: 3918268 (1975-11-01), Nussbaum
patent: 4165037 (1979-08-01), McCarson
patent: 4173865 (1979-11-01), Sawyer
patent: 4191023 (1980-03-01), Sisk et al.
patent: 4256475 (1981-03-01), Schafer
patent: 4257239 (1981-03-01), Partin et al.
patent: 4270518 (1981-06-01), Bourne
Duberg John E.
Hayters Enterprises, Inc.
King Lloyd L.
Lake, Jr. Rutherford C.
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