The utility model relates to an opening control circuit for an electric heating tube of a regenerative electric water heater provided with a pressure switch, which comprises a pressure switch and a singlechip. The characteristics of the pressure switch is arranged on the lower end of the regenerative electric water heater container, pressure switch and I / O microcontroller is connected with the input end and the other end is grounded. When the pressure switch is adjusted to the full water of the container, the pressure switch closes. SCM I / O output end is connected with the triode switching circuit, the normally open contact is connected with the triode switching circuit of the relay is respectively connected with the electric heating pipe line and the zero line is connected to import. The utility model has the beneficial effect that the single chip microcomputer makes a correct judgement on whether the container is full of water by detecting the potential of the pressure switch. Make sure that the electric heating tube is heated before the container is full of water, which can effectively prevent the heating pipe from drying. The device is used in conjunction with a temperature control circuit to cut off the power supply of the heating tube when the set temperature is reached.
【技术实现步骤摘要】
【技术保护点】
一种装有压力开关的蓄热式电热水器电加热管开启控制电路，包括压力开关和单片机，其特征是压力开关安装在蓄热式电热水器容器下端，压力开关一端与单片机Ｉ／Ｏ输入端相连接，另一端接地，压力开关调整至容器满水时压力开关闭合，单片机Ｉ／Ｏ输出端与三极管开关电路相连接，与三极管开关电路相连接的继电器的常开触点分别与连接电加热管的火线与零线的进出端相连接。
【技术特征摘要】
还没有人留言评论。发表了对其他浏览者有用的留言会获得科技券。