| 摘要 |
<p>PURPOSE:To attain a low cost heat pump device for hot water supply, which elminates the needs of a water level switch, a water temperature sensor on the outlet side of heat pump for heating and a flow rate controlling motor-driven valve, by a method wherein a water piping on the city-water intake side is connected through a solenoid valve and a ball tap valve to a hot water storage tank so as to directly supply city water to the hot water storage tank. CONSTITUTION:A ball tap valve 16, which closes when the water level in a hot water storage tank 2 is at its full water level, is provided on a water piping to supply city water to the hot water storage tank 2 and at the same time a solenoid valve 6 is interposed in said water piping for supplying city water so as to directy supply city water through the solenoid valve 6 and the ball tap valve 16 to the hot water storage tank 2. Accordingly, no joining and branching-off of city water is necessary for the water piping 3a. As a result, the needs of the water level switch in the hot water storage tank, a water temperature sensor at the outlet of heat pump for heating and a flow rate controlling motor-driven valve on the water piping on city water supply side are eliminated.</p> |
