| 摘要 |
<P>PROBLEM TO BE SOLVED: To smoothly start heat pump units, to obtain large capacities using a plurality of the heat pump units, and to avoid the shortage of a heat amount. <P>SOLUTION: This heat pump unit includes a heat pump heating circulation circuit 4 which circulates hot water in a hot-water storage tank 2 between the hot-water storage tank 2 and the heat pump unit 3A, a control device C starts the heat pump unit 3A when a temperature (TS1) of the hot-water storage tank 2 and a temperature (HP1) of the hot water flowing in the heat pump unit 3A become not higher than a starting lower-limit temperature, stops the heat pump unit 3A when the TS1 reaches a stopping upper limit temperature, and forcibly operates a circulation pump 8A for a prescribed period of time irrespective of the HP1 when the TS1 becomes not higher than the starting lower limit temperature. <P>COPYRIGHT: (C)2012,JPO&INPIT |
