Heat pump with pressure reducer

Details Heat pump with pressure reducer Heat pump with pressure reducer

2008-10-16

2011-10-18

Jones, Melvin (Department: 3744)

Refrigeration

Reversible, i.e., heat pump

Reexamination Certificate

active

08037709

ABSTRACT:
A heat pump HVAC system with an integrated pressure reducer which reduces the head pressure of the system when operating in the cooling mode and thus reduces compressor workload. The heat pump HVAC system includes a compressor for compressing a refrigerant, an exterior coil positioned outside of a building, an interior coil positioned within the building, and a reversing valve for changing the flow direction of refrigerant in the refrigerant circuit. A heat exchanger is provided between the outlet of the exterior coil and the thermal expansion valve. The heat exchanger cools the refrigerant flowing between the outlet of the exterior coil and thermal expansion valve using refrigerant exiting the interior coil.

REFERENCES:
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patent: 4311498 (1982-01-01), Miller
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patent: 4959975 (1990-10-01), Harris
patent: 4977751 (1990-12-01), Hanson
patent: 5189883 (1993-03-01), Bradford
patent: 5335508 (1994-08-01), Tippmann
patent: 5826433 (1998-10-01), Dube
patent: 6216481 (2001-04-01), Kantchev
patent: 6351950 (2002-03-01), Duncan
patent: 6502412 (2003-01-01), Dube

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