It adopts automatic electric heating temperature control, and is equipped with overheating protection device; It is equipped with thermal insulation device and ultraviolet sterilization function; Only need to start the button, the electric heating heating system automatically heats up, when the temperature in the cabinet tank reaches the set temperature, the program automatically enters the heat preservation state; When the temperature in the cabinet tank is lower than the set temperature, the electric heating system automatically carries out the heating work.