Automatic timer for washing

The invention discloses an automatic timer for washing. The automatic timer comprises a shell and a bottom disc detachably connected with the shell; a circuit board is fixed to the bottom disc, the circuit board is provided with a sensor and a timer body electrically connected with the sensor, and the timer body is electrically connected with a solenoid valve arranged in a faucet. The hand washingtime is preset through the timer, thus a user is helped to develop a reasonable hand washing habit, and the optimal cleaning effect can also be achieved while water sources are saved. 本发明公开了种冲洗用的自动计时器，包括外壳、与所述外壳可拆卸连接的底盘，所述底盘固定有线路板，所述线路板上设置有感应器、及与感应器电连接的计时器，所述计时器电连接有设置在水龙头中的电磁阀。通过计时器预先设置洗手时间，帮助使用者养成合理的洗手习惯，既节省水资源的同时也能达到最好的清洁效果。