Defrost subcircuit for air-to-air heat pump

Details Defrost subcircuit for air-to-air heat pump Defrost subcircuit for air-to-air heat pump

1998-01-15

1999-11-16

Doerrler, William

Refrigeration

Reversible, i.e., heat pump

With atmospheric condensate removal or prevention

62260, 62278, F25B 1300, F25B 4700, F25D 2312

Patent

active

059836601

ABSTRACT:
A heat pump system having a defrost subcircuit that draws heat from a geothermal heat source. The defrost subcircuit is connected to the outdoor air coil in parallel with the indoor coil. The system includes a control mechanism for selectively circulating refrigerant through the defrost subcircuit but not the indoor air coil during the defrost mode. The heat pump system further includes components which permit the defrost subcircuit to be pumped down when the system leaves the defrost mode.

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