Water heater control method and device and gas water heater

The invention discloses a water heater control method and device and a gas water heater. The method comprises the steps that the pressure of an evaporation cavity is obtained; judging whether the pressure of the evaporation cavity is greater than preset pressure; if yes, the gas valve is controlled...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	ZHANG QI, ZHANG SHANGBING, LI LUOBIAO, LU YUCONG, PAN TONGJI
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	BLASTING FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEATGENERATING MEANS, IN GENERAL HEATING LIGHTING MECHANICAL ENGINEERING RANGES VENTILATING WEAPONS
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Beschreibung
Zusammenfassung:	The invention discloses a water heater control method and device and a gas water heater. The method comprises the steps that the pressure of an evaporation cavity is obtained; judging whether the pressure of the evaporation cavity is greater than preset pressure; if yes, the gas valve is controlled to be closed; if not, the water level of the condensate water in the evaporation cavity and the temperature of the evaporation cavity are obtained, and the gas valve is controlled to be opened or closed according to the water level of the condensate water and the temperature of the evaporation cavity. The gas valve is controlled to be closed when the pressure of the evaporation cavity is larger than the preset pressure due to the fact that the exhaust port is blocked, and the safety problem caused by overhigh pressure and overhigh temperature of the evaporation cavity after the exhaust port is blocked is avoided; when the pressure of the evaporation cavity is smaller than or equal to the preset pressure, the gas va