Super-critical refrigerant cycle system and water heater...

Details Super-critical refrigerant cycle system and water heater... Super-critical refrigerant cycle system and water heater...

2006-07-18

2006-07-18

Tyler, Cheryl (Department: 3744)

Refrigeration

Disparate apparatus utilized as heat source or absorber

With vapor compression system

C062S224000, C165S048100

Reexamination Certificate

active

07076964

ABSTRACT:
In a heat-pump water heater with a super-critical refrigerant cycle, a valve open degree of a decompression valve is controlled to control a pressure of high-pressure side refrigerant so that a temperature difference between refrigerant flowing out from the water-refrigerant heat exchanger and water flowing into a water-refrigerant heat exchanger is set in a predetermined temperature range. Thus, the pressure of high-pressure side refrigerant in the super-critical refrigerant cycle can be controlled, thereby suitably adjusting heat-exchange performance of an internal heat exchanger, and restricting the temperature of refrigerant discharged from the refrigerant compressor from being uselessly increased.

REFERENCES:
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patent: 5025634 (1991-06-01), Dressler
patent: 5245836 (1993-09-01), Lorentzen et al.
patent: 5323844 (1994-06-01), Sumitani et al.
patent: 6164081 (2000-12-01), Jensen et al.
patent: 6370896 (2002-04-01), Sakakibara et al.
patent: 6418737 (2002-07-01), Kuroki et al.
patent: 6508073 (2003-01-01), Noro et al.
patent: 2001-82803 (2001-03-01), None

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