| 摘要 |
PROBLEM TO BE SOLVED: To obtain a high delivery refrigerant temperature of a compressor ensuring delivery of high temperature hot water even if the outdoor air temperature is low while preventing liquid mixed compression of the compressor. SOLUTION: When hot water is supplied, a compressor 1 for compressing refrigerant, a water heat exchanger 3 arranged with heating tubes 8, an expansion valve 4, a heat exchanger 5 with a fan 18, and an accumulator 7 are coupled annularly through refrigerant piping and hot water is delivered by supplying water to the heating tubes 8. In such a heat pump cycle A, the refrigerant piping 19 is coupled in the downstream of the heat exchanger 5 with a second heat exchanger 6 arranged with second heating tubes 9, and the heating tubes 8 are coupled annularly with the second heating tubes 9 of the second heat exchanger 6 through hot water piping 10 provided with a hot water pump 11. |
