Heat exchange – Regenerator – Checker brick structure
Patent
1994-11-08
1996-07-23
Ford, John K.
Heat exchange
Regenerator
Checker brick structure
165 12, 165 29, 62160, 237 2B, 219486, F25B 2900
Patent
active
055380727
ABSTRACT:
A method of controlling a current defrost cycle for an outdoor coil of a heat pump system, the heat pump system having a plurality of supplemental heating elements for heating an air stream passing from an indoor coil to an air supply duct during defrost operation, wherein an initial quantity of supplemental heating elements energized is a function of a most recent previous defrost cycle. The method has the steps of: energizing the initial quantity of supplemental heating elements upon initiation of a defrost cycle; determining whether the initial quantity of supplemental heating elements provided is excessive; deactivating at least one of the supplemental heating elements if the initial quantity of supplemental heating elements being provided is excessive; determining whether the initial quantity of supplemental heating elements provided is insufficient; activating, if the initial quantity of supplemental heating elements being provided is insufficient, at least one additional supplemental heating element if the element is available; and retaining information as to an initial quantity of supplemental heating elements to be activated for a following defrost cycle, wherein the initial quantity of supplemental heating elements to be activated for a following defrost cycle is equal to a number of supplemental heating elements activated upon termination of the current defrost cycle.
REFERENCES:
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patent: 4353409 (1982-10-01), Saunders et al.
patent: 4356962 (1982-11-01), Levine
patent: 4725001 (1988-02-01), Carney et al.
patent: 4759498 (1988-07-01), Levine et al.
patent: 5332028 (1994-07-01), Marris
Burkhart Larry J.
Burns Larry D.
Carrier Corporation
Ford John K.
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