| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve operation efficiency, by optimizing operation control for two kinds of uses of hot water supply and floor heating, in a heat pump hot water supply floor heating device of a two-cycle direct hot water supply system. <P>SOLUTION: This invention is the heat pump hot water supply floor heating device having a single system heat pump refrigerating circuit 41, a double system heat pump refrigerating circuit 42, a floor heating circuit 50, and an operation control means 55. The operation control means can perform optimal temperature control, by respectively setting a control quantity of a compressor rotating speed to the water outlet temperature of a hot water supply heat exchanger 3 in both a single system and a double system, setting a target value of the compressor rotating speed to a higher value among a hot water supply temperature target value and a floor heating forward temperature target value in the single system and to the hot water supply temperature target value in the double system, setting a control quantity of hot water supply expansion valve openings 4a and 4b to an evaporator overheating degree or the compressor delivery temperature in both the single system and the double system, and setting a control quantity of floor heating expansion valve opening to the floor heating forward temperature and a target value to the floor heating forward temperature target value, with the target value as a predetermined target value, when simultaneously operating the hot water supply and the floor heating. <P>COPYRIGHT: (C)2009,JPO&INPIT |
