Refrigeration – Processes – Circulating external gas
Patent
1995-10-27
1997-07-29
Wayne, William E.
Refrigeration
Processes
Circulating external gas
62173, 621964, F25D 1706, F25B 4100
Patent
active
056512589
ABSTRACT:
An air conditioning apparatus includes a subcooling heat exchanger for subcooling refrigerant being delivered to an evaporator and for reheating air flow downstream from the evaporator; and a hot vapor heat exchanger, connectable in fluid communication with a refrigerant outlet of a compressor and positioned in the air flow downstream from the evaporator, for further reheating the air flow from the evaporator to further lower the relative humidity of the air flow. The air conditioning apparatus also preferably includes a hot vapor heat exchanger controller for selectively connecting the hot vapor heat exchanger in fluid communication with the refrigerant outlet of the compressor responsive to a sensed temperature. More particularly, the hot vapor heat exchanger controller may preferably include a solenoid valve connected in fluid communication between the hot vapor heat exchanger and the refrigerant outlet of the compressor, a thermostatic switch operatively connected to the solenoid valve for opening the solenoid valve when a temperature of air downstream from the hot vapor heat exchanger is below a predetermined temperature, a check valve connected in fluid communication with the hot vapor heat exchanger, and a differential pressure control valve connected in fluid communication between the compressor and the condenser and across the hot vapor heat exchanger for further controlling reheating by the hot vapor heat exchanger when the solenoid valve is open. Method aspects of the invention are also disclosed.
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Information Package--Subcool and DeSuperheat Reheat System, American Heat Pipes, Inc. (Feb. 1994).
Heat Controller, Inc.
Wayne William E.
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