| 摘要 |
A quick water heater includes a housing, a water tank, a heating device having an inlet and an outlet, a water pump, a water outlet, a NTC thermistor, and a control circuit board. The water pump is connected between the water tank and the inlet by two water pipes. The water outlet is connected with the outlet. The control circuit board is electrically connected with the heating device and the water pump. The control circuit board includes a first SCR cooperating with the NTC thermistor to control the water pump on or off and a second SCR cooperating with the NTC thermistor to control power of the heating device. When the water temperature of the water outlet reaches to a predetermined temperature, the NTC thermistor sends out a feedback signal to the control circuit board, and then the control circuit board cuts off a power supply of the heating device.
|
