When the warm water dispenser is in use, press the heating switch, and the power supply will provide power for the "keep warm" indicator light as a power-on indication. At the same time, the power supply is divided into two circuits: one circuit constitutes a heating circuit, which enables the electric heating tube to be energized and heated to open the temperature; When the water in the hot tank is heated to the set temperature, the thermostat contacts are newly opened, the heating and heating indication circuit power is cut off, and the "heating" indicator light goes out. The heating tube stops heating. When the water temperature drops to the set temperature, the thermostat contacts connect to the power circuit and the electric heating tube reheats. Keep the water temperature between 85-95 degrees Celsius over and over again.

    There are double protection elements in the warm water dispenser circuit. When the water dispenser is over-temperature or short-circuit fault occurs, the over-temperature fuse will automatically start or manually reset the thermostat to automatically disconnect the heating circuit power supply to play a protective role.

    When the semiconductor direct-cooling hot and cold water dispenser is in use, the direct-cooling hot and cold water dispenser provides room temperature water from the water tank, and the water inlet west: one way enters the cold tank container, and the cold water is refrigerated: the other way enters the hot tank. Hot water is heated. After pressing the refrigeration switch, the AC voltage is stepped down by the power transformer, the rectifier diode is used for full-wave rectification, the capacitor is filtered, and then the DC voltage is output for the cooling of the semiconductor refrigeration component, and the exhaust of the fan. At the same time, the cooling indicator light is on. Since the direct-cooled hot and cold water dispenser does not have automatic temperature control, the cooling indicator light is always on after it is turned on. Press the heat switch. The heating indicator light is on, the electric heating tube heats up, and the water in the hot tank heats up. When the water temperature reaches the set temperature, the contact of the thermostat is disconnected, the heating power is automatically cut off, the heating indicator light goes out, and the electric heating tube stops heating. When the water temperature drops to the set temperature, the contact of the thermostat is closed, the heating power is automatically connected, the heating indicator light is on, and the electric heating tube heats up. The above process is then repeated. Keep the water temperature constant between 85-95 degrees Celsius.