Discharge valve to increase heating capacity of heat pumps

Details Discharge valve to increase heating capacity of heat pumps Discharge valve to increase heating capacity of heat pumps

2007-08-21

2007-08-21

Norman, Marc (Department: 3744)

Refrigeration

Automatic control

Selective heating or cooling

C062S510000, C062S513000

Reexamination Certificate

active

10936034

ABSTRACT:
A heat pump is provided with a discharge valve on a discharge line. The discharge valve can be positioned to modulate or pulse refrigerant flow from the discharge line heading toward an indoor heat exchanger, when in a heating mode. By providing this restriction, the pressure and the temperature of the refrigerant increases. This increased temperature provides additional heating capacity as well as increases the temperature of the delivered indoor air, minimizing “cold blow” and making the end user more comfortable. The use of discharge valve can also minimize or entirely eliminate the ON/OFF unit cycling, as the amount of heat delivered can be precisely controlled by pulsing or modulating the valve, thus reducing unit cycling losses, improving user comfort and enhancing reliability.

REFERENCES:
patent: 2694296 (1954-11-01), Prosek et al.
patent: 5172564 (1992-12-01), Reedy
patent: 5263333 (1993-11-01), Kubo et al.

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