Heat Transfer Medium Circulation System

Abstract

This heat medium circulation system 100 comprises: a refrigerant circuit 110 that uses a combustible refrigerant and in which a compressor 111, a use-side heat exchanger 112, an expansion means 113, and a heat source-side heat exchanger 114 are connected in an annular manner; an air blowing device 117 circulating air to the heat source-side heat exchanger 114; a housing 140 incorporating at least the refrigerant circuit 110 and the air blowing device 117; an electric heating device 143 provided to a bottom plate 141 of the housing 140; and a control device 130. The control device 130 simultaneously starts the operation of the air blowing device 117 and the conduction of the electric heating device 143, and controls the power consumption of the electric heating device 143 so as to be lower than that at a stable time for a prescribed time from the start of conduction of the electric heating device 143, thereby stably operating the electric heating device 143, which suppresses freezing of drain water, and further improving safety.

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