| 摘要 |
<p>PURPOSE:To protect electronic parts mounted on a controlling circuit board from heat generated from a heat exchanging part by cooling effectively the controlling circuit board in a hot water feeder. CONSTITUTION:In a hot water feeder 10 having therein a heat exchanging part 34 and a controlling circuit board 42, thermoelements 48 for power generation are disposed in relation to thermoelectric power generation with respect to the heat exchanging part 34, and thermoelements 50 for cooling are disposed in relation to thermoelectric cooling with respect to the controlling circuit board 42. In order to actuate the thermoelements 50 for cooling with a current generated by the thermoelements 48 for power generation, the thermoelements 48 for power generation are electrically connected to the thermoelements 50 for cooling. The cooling of the controlling circuit board 42 are automatically started in accordance with operation of the hot water feeder 10, and the cooling capability of the thermoelements 50 for cooling is increased in response to the rise of a temperature at the heat exchanging part 3.</p> |
