초록 ▼

A defrost control for a heat pump system initiates a defrost when certain computed conditions are exceeded. The conditions include a limit as to the difference that may be permitted between the maximum temperature difference of two measured temperatures and the current difference of these measured t

A defrost control for a heat pump system initiates a defrost when certain computed conditions are exceeded. The conditions include a limit as to the difference that may be permitted between the maximum temperature difference of two measured temperatures and the current difference of these measured temperatures. The two measured temperatures are the temperature of the indoor coil of the heat pump and the indoor air temperature of the air being heated by the indoor coil.

대표청구항 ▼

[ What is claimed is:] [1.] A method for controlling the initiation of a defrost action in a heat pump system comprising the steps of:noting the difference in temperature between the temperature of an indoor coil of the heat pump system and the room air temperature of the room being heated by the he

[ What is claimed is:] [1.] A method for controlling the initiation of a defrost action in a heat pump system comprising the steps of:noting the difference in temperature between the temperature of an indoor coil of the heat pump system and the room air temperature of the room being heated by the heat pump system;computing any difference between the noted difference in temperature and a maximum temperature difference that has been noted as having occurred between the indoor coil temperature and the room air temperature following a previous defrost action of the outdoor coil;computing a limit for the difference between the noted difference in temperature and the noted maximum temperature difference between the indoor coil temperature and the room air temperature that establishes a threshold for potentially initiating a defrost of the outdoor coil of the heat pump system wherein the limit that establishes a threshold for potentially initiating a defrost is computed as a function of the value of the noted maximum temperature difference; anddetermining whether a defrost action of the outdoor coil of the heat pump system should be activated when the computed difference between the noted difference in temperature and the noted maximum temperature difference between the indoor coil temperature and the room air temperature exceeds the computed limit that establishes a threshold for potentially initiating a defrost.