| 摘要 |
A method for controlling an electric water heater (1). The electric water heater (1) comprises at least two sets of PTC (301, 3) heating elements capable of conducting start control separately. After the electric water heat (1) is powered on, the at least two sets of PTC heating elements (301, 3) are controlled to be started in an alternate mode, and each time after the corresponding PTC heating element is started, the actual highest total power of the electric water heater (1) is less than the set highest total power. After the electric water heater (1) is powered on, the at least two sets of PTC heating elements (301, 3) do not start to work simultaneously; instead, the PTC heating elements (301, 3) are started in an alternate mode, so that excessive current and power are prevented, and circuit overload of the electric water heater (1) cannot occur. |
