Heat pump defrost control

Details Heat pump defrost control Heat pump defrost control

1996-08-12

1998-06-02

Tanner, Harry B.

Refrigeration

Processes

Defrosting or frost inhibiting

62155, 62156, 62234, 62278, F25D 2106

Patent

active

057585075

ABSTRACT:
The present invention relates to a method for alleviating a short-term "cold blow" effect in a heat pump heating system. According to a method of the invention, reversing of a system valve in response to the sensing of a defrost condition is delayed by a predetermined time. The amount of this delay time depends upon the amount of time required for a supplementary heating unit to achieve an output sufficient to offset the cooling effect resulting from there being a cold indoor coil.

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patent: 5052191 (1991-10-01), Shapiro-Baruch
patent: 5095711 (1992-03-01), Marris et al.
patent: 5332028 (1994-07-01), Marris

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