Electric water heater



PROBLEM TO BE SOLVED: To provide an electric water heater capable of stopping a heater before hot water in a hot water storage tank is boiled up by keeping a circulation pump in an ON state, even when the heater continues its operation due to deposition in a relay that switches power distribution to the heater. SOLUTION: When a boil-up completion thermistor 10 detects 104°C, after the boil-up terminal thermistor 10 detects 107°C, and the circulation pump 9 is switched to the ON state, the circulation pump 9 is switched to an OFF state until the boil-up completion thermistor 10 detects 107°C again, and this processing is repeated. When a high power source-side protective device 12 detects a hot water temperature of 100°C or more, an AC power source 13 flowing in a high power source-side circuit is cut off, and power distribution to a heater 6 or a heater 7 is stopped. COPYRIGHT: (C)2007,JPO&INPIT
【課題】ヒータへの通電をスイッチングするリレーが溶着すると、ヒータが通電したままの状態となり、貯湯タンクに貯湯される湯水が沸騰して危険な状態となる。 【解決手段】沸上げ完了サーミスタ10が107℃を検出して循環ポンプ9をON状態とした後に、沸上げ完了サーミスタ10が104℃を検出すれば、再び沸上げ完了サーミスタ10が107℃を検出するまで循環ポンプ9をOFF状態とし、この処理を繰り返す。そして、高電源側保安器12が100℃以上の湯水温度を検知すれば、高電源側回路を流れる交流電源13の遮断を行い、ヒータ6またはヒータ7への通電が停止する。 【選択図】図3




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    CN-102192586-ASeptember 21, 2011中国核动力研究设计院蒸汽发生器二次侧役前水压试验用高功率密度电加热水箱
    CN-102192586-BNovember 06, 2013中国核动力研究设计院High power density electric heating water tank for secondary pre-service hydraulic pressure test of steam generator