Staged cooling direct expansion geothermal heat pump

Details Staged cooling direct expansion geothermal heat pump Staged cooling direct expansion geothermal heat pump

1993-10-20

1995-02-14

Tanner, Harry B.

Refrigeration

Automatic control

Selective heating or cooling

621964, 62200, 62260, 622387, 623246, 165 45, F25B 1300

Patent

active

053884191

ABSTRACT:
A "DX" heat pump is provided herein which is based on the principle of providing optimal heat exchange in the heating mode through three parallel ground loops, two of which can be cut off from the system and evacuated of refrigerant in the cooling mode. The loops are designed in terms of volume so that the refrigerant charge is correct in the heating mode when split in three loops and also correct in the cooling mode when only one loop is used, but it contains the full system refrigerant charge. The loops are provided with "TX" metering valves which can be individually operated to provide a staged cooling system.

REFERENCES:
patent: 4327560 (1982-05-01), Leon et al.
patent: 4753285 (1988-06-01), Rawlings
patent: 4878357 (1989-11-01), Sekigami et al.
patent: 4920757 (1990-05-01), Gazes et al.
patent: 5025634 (1991-06-01), Dressler
patent: 5038580 (1991-08-01), Hart
patent: 5136855 (1992-08-01), Lenarduzzi

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