電気湯沸かし器

Electric water heater

Abstract

PROBLEM TO BE SOLVED: To obtain an electric water heater which is low in cost and which does not generate much heat in the circuit base board and which does not bring thermal breakage in the switching part or the like when a current fuse is not molten with troubles, by providing a Darlington connection part connected to a condenser to act the switching motion by means of the output of controller. SOLUTION: A Darlington connection part 31 is constituted of a first transister 25, a second transister 28, and resistances 27, 29, 30. A controller 42 generates a basic voltage by a basic voltage circuit 39 and generates divided potentials by a potential dividing circuit 36. Both voltages are compared by a comparison circuit 35 and the Darlington connection part 31 is controlled on the basis of the result. The switching control is exterted so as to put on or off the Darlington connection part 31 in accordance with the divided potential smaller than the basic voltage or larger than that. Rectifying elements 21, 22, the condenser 43, and a heat-retaining heater 4 are connected to an AC source 17 in series.
(57)【要約】 【課題】 コストが安く、かつ回路基板の発熱量が小さ く、かつ保温ヒーターと湯沸かしヒーターが接触して故 障し電流ヒューズが溶断しない場合にスイッチング部等 が熱破壊しない電気湯沸かし器を提供する。 【解決手段】 交流電源に接続された湯沸かしヒーター と、その交流電源に直列接続された整流素子とコンデン サと保温ヒーターと、そのコンデンサの電圧を検出する 制御部と、前記コンデンサに接続されかつ前記制御部の 出力によりスイッチングするダーリントン接続部とを具 備する事を特徴とする電気湯沸かし器。

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