Introduction to the working principle of the water dispenser

Warm water dispenser

When the warm water dispenser is in use, press the heating switch, and the power supply provides power for the “insulation” indicator to indicate power. At the same time, the power supply is divided into two ways: one way constitutes a heating circuit, so that the electric heating tube is energized and heated to heat up; the other way provides a voltage for heating indication of the "heating" indicator light. When the water in the hot tank is heated to the set temperature, the thermostat contacts are disconnected, the heating and heating indication circuit power is cut off, the "heating" indicator is extinguished, and the electric heating tube stops heating.

When the water temperature drops to the set temperature, the thermostat contacts are connected to the power supply circuit, and the electric heating tube is reheated, so that the water temperature is maintained at 85-95 ° C.

The warm water dispenser circuit is a double protection component. When the water dispenser is over temperature or short circuit fault occurs, the overheating fuse automatic melting or manual reset thermostat automatically disconnects the heating circuit power supply to protect the water. The over-temperature fuse is a one-time thermal protection component, which cannot be reset. After the fault is removed, replace the new over-temperature fuse according to the original model specification, and then manually reset the reset button of the thermostat by hand. The contact can be closed again. .

Hot and cold water dispenser

When the semiconductor direct-cooling hot and cold water dispenser is in use, the direct-cooling hot and cold water dispenser provides normal temperature water from the water tank, and enters the water two ways: all the way into the cold bile container, after cooling out the cold water; the other way into the hot tank, after heating Hot water.

After pressing the cooling switch, the AC voltage is stepped down by the power transformer, the rectifier diode is used for full-wave rectification, and the capacitor is filtered. The DC voltage is output for cooling of the semiconductor refrigeration unit and the fan is exhausted, and the cooling indicator is illuminated. Since the direct cooling type hot and cold water dispenser does not have automatic temperature control, the cooling indicator light is always on after the power is turned on.

Press the heating switch, the heating indicator lights, the electric heating tube heats up, and the water in the hot tank heats up. When the water temperature rises to the set temperature, the thermostat contact is disconnected, the heating power is automatically cut off, the heating indicator is extinguished, and the heating tube stops heating. When the water temperature drops to the set temperature, the thermostat contacts close, the heating power is automatically turned on, the heating indicator lights, and the electric heating tube heats up. The above process was repeated to maintain the water temperature at a constant temperature between 85 and 95 °C.

Compression refrigeration water dispenser

When the compression refrigeration water cooler refrigeration switch is pressed, the cooling green indicator light is on, the compressor starts to run, and the refrigerant vapor that has been absorbed and vaporized in the evaporator is sucked back, and then compressed into high temperature, high pressure gas, and sent to the condensation. The device radiates and condenses into the high-pressure liquid through the condenser to the outside air, and then flows into the evaporator through capillary throttling, absorbs the heat of the cold bile and causes the water temperature to drop, and is then sucked back by the compressor. This cycle, to achieve the purpose of cooling. When the water temperature drops to the set temperature with time, the refrigeration thermostat contact is disconnected, the cooling green indicator light is extinguished, the compressor stops, and the heat transfer condition is transferred. After the power is cut off, the water temperature gradually rises. When the temperature rises to the set temperature, the cooling thermostat contacts are closed, the green indicator light is turned on, and the compressor is running. This cycle, the water temperature is controlled between 4-12 °C.

Press the heating switch, the heating circuit is turned on, the red heating indicator lights up, and the electric heating tube heats up. When the water temperature rises to the set temperature, the thermostat is automatically reset, the power is turned off, the red heating indicator is extinguished, and the switch is turned Insulation conditions. After the power is cut off, the water temperature gradually decreases. When the temperature drops to the set temperature, the contact of the thermostat is closed, the power is turned on, the red heating indicator lights up, and the electric heating tube heats up again. This cycle, the water temperature is controlled between 85-95 °C.

The fuse temperature fuse and the manual reset thermostat of the water dispenser are protection devices, which automatically fuse or disconnect the circuit when the circuit is overheated or overloaded, thereby playing a safety protection role.

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