Back to results
US 4,137,725 AGranted
Compressor control for a reversible heat pump
AssigneeFedders Corporation
InventorRobert L. Martin
Life of this patent
Estimating the term…
Abstract
A control means is provided in the control circuit for a heat pump whereby a change in mode of the heat pump will result in the compressor being deenergized and maintained deenergized for a period of time determined by the control means, to allow equalization of refrigerant pressure within the heat pump system.
Claims5
In combination with a compressor operated reversible heat pump, control means operable to deactivate the compressor of the heat pump upon switching of modes of the heat pump from heating to defrosting thereby to prevent damage to the compressor due to pressure differences in the heat pump, said control means comrising:
- mode responsive switch operable, in response to the switching of modes of the heat pump between the heating and defrosting modes, to deactivate the compressor;
- and
- a timer switch operable to reactivate the compressor subsequent, by a predetermined period of time sufficient to allow substantial equalization of pressures in the refrigerant system of the heat pump, to the deactivation of the compressor by the mode responsive switch.
Dependencies are inferred from the claim text.