Refrigerant-heating type heating apparatus

Claim 1

A refrigerant-heating type heating apparatus, comprising: a refrigeration cycle including a compressor, an indoor heat exchanger arranged in a room, a refrigerant-heating unit for heating the refrigerant, and refrigerant tubes connecting the above components to each other, the refrigerant heating unit having a heat exchanger section through which a refrigerant flows, heating means whose combustion rate is adjustable, and guide means for guiding a combustion gas produced by the combustion of the heating means so as to heat the refrigerant flowing through the heat exchanger section; room temperature detecting means for detecting the temperature of the room; temperature presetting means for presetting a desired room temperature; refrigerant temperature detecting means for detecting the temperature of a refrigerant flowing into the heat exchanger section of the refrigerant-heating means; and control means for driving the heating means at a combustion rate according to the difference between the room temperature detected by the room temperature detecting means and the preset temperature preset by the temperature presetting means, and for shifting the combustion rate of the heating means, in accordance with the refrigerant temperature detected by the refrigerant temperature detecting means, so as to prevent the condensation of water vapor in the combustion gas flowing through the guide means when the combustion rate of the heating means is in a specified range.