| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a hot water supply device capable of preventing breaking of a pump-loading circuit by improving accuracy in detecting a temperature of a power circuit, and increasing an output of a pump. <P>SOLUTION: This hot water supply device comprises a heat exchanger for exchanging heat between a refrigerant and the water, a tank for storing the water, and a pump for circulating the water, the pump comprises a pump portion comprising a second casing having a suction opening and a discharge opening of the water, and an impeller, a stator portion comprising an iron core formed by stacking electromagnetic steel plates, a winding wire inserted into the iron core, a circuit board 13 on which a driving circuit is mounted, and a first casing, and molded with a mold resin, and a rotor portion comprising a bearing approximately at its central portion, and provided with a wheel at an outer side of the bearing and a magnet portion at an outer side of the wheel, and the driving circuit is a circuit for driving a brushless DC motor composed of the stator portion and the rotor portion, and comprises the power circuit 32 and a temperature detecting circuit 40 detecting a temperature of the power circuit 32. <P>COPYRIGHT: (C)2008,JPO&INPIT |
