Refrigeration – Automatic control – Of external fluid or means
Patent
1994-10-13
1996-03-05
Tapolcai, William E.
Refrigeration
Automatic control
Of external fluid or means
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.
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Christopher Guly, "Cool Comfort", Homes & Cottages, 1994, pp. 25 and 27.
Lipsitz Barry R.
Tapolcai William E.
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