Convertible air conditioning unit usable as water heater

Refrigeration – Automatic control – Of external fluid or means

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Details

622386, 622387, F25B 3904

Patent

active

054957230

ABSTRACT:
An improvement for converting an air conditioner or heat pump system into a water supply heater, including a water cooled condenser having a refrigerant throughflow passageway and a water throughflow conduit for bringing a water supply pumped therethrough into heat exchange relationship with the refrigerant. A three-way valve connects the compressor to the water-cooled condenser or to an exterior heat exchanger in the air conditioner, or a reversing valve in the heat pump. Control system including a water pressure switch for actuating the three-way valve, a refrigerant pressure activated water regulator valve mounted on the inflow side of the water throughflow conduit, and a thermostat, route refrigerant via the three-way valve to the water cooled condenser only when a water supply is desired to be heated, thereby preventing the build-up of scale in the condenser water conduits. The control system also switches off the fan of the exterior heat exchanger when the water-cooled condenser is in use.

REFERENCES:
patent: 2700279 (1955-01-01), Stickel
patent: 3017162 (1962-01-01), Haines et al.
patent: 3188829 (1965-06-01), Siewert et al.
patent: 3498072 (1970-03-01), Stiefel
patent: 4168745 (1979-09-01), Lastinger
patent: 4279128 (1981-07-01), Leniger
patent: 4386500 (1983-06-01), Sigafoose
patent: 4513580 (1985-04-01), Cooper
patent: 4588026 (1986-05-01), Hapgood
patent: 4907418 (1990-03-01), DeFazio
patent: 5054542 (1991-10-01), Young et al.
patent: 5184472 (1993-02-01), Guilbault et al.
Christopher Guly, "Cool Comfort", Homes & Cottages, 1994, pp. 25 and 27.

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