| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve starting characteristics by maintaining heat pump operation at high efficiency, even under an operation condition of raising the outlet side refrigerant temperature of a radiator. <P>SOLUTION: This heat pump hot water supply device is provided with: a first bypass circuit 8; and a second bypass circuit 11 connected to a heat storage unit 13, and provides high efficiency heat storage operation of heat pump quick in rising of the refrigerant temperature and superior in the starting characteristics, by supplying a low temperature refrigerant to an orifice means 3 by lowering the refrigerant temperature by storing heat in the heat storage unit 13 by switching to the first bypass circuit 8 when the outlet temperature of the radiator 2 of a heat pump refrigerant circuit 9 is high, and also by supplying the refrigerant to the radiator 2 by raising the refrigerant temperature by the heat storage unit 13 by switching to the second bypass circuit 11 when the outlet temperature of a compressor 1 is low when restarting the operation. <P>COPYRIGHT: (C)2009,JPO&INPIT |
