You must drink cold water every day during the hot summer, but you don't necessarily know how the water cooler is cooled. There are many refrigeration water dispensers on the market today, which are mainly divided into electronic cooling water dispensers and thermoelectric cooling water dispensers . The following small series briefly introduces the refrigeration principle of the cooling water dispenser . ·Electronic refrigeration water dispenser Electronic cooling water dispenser: also known as semiconductor cooling water dispenser, chip cooling. It features low power consumption, low operating noise, no pollution, automatic control and low price. The inadequacies are the slow speed of refrigeration and the low supply of cold water, which is suitable for households and units with few drinking water. The refrigeration principle of the compressor cooling water dispenser is the same as that of the refrigerator. The difference is that the evaporator is wound around the stainless steel tank wall and absorbs heat to cool the water. Its cooling capacity is about 3L, and the cooling power is between 75-110W. It has the reliability of the whole machine. High-quality, high cooling efficiency, fast cooling speed, and large amount of cold water supply, its cooling performance is obviously better than the electronic cooling water dispenser, but the price is more expensive, and it is suitable for households and units with a large number of drinking water. After the refrigeration switch is pressed, the AC voltage is stepped down by the power transformer, the rectifier diode is full-wave rectified and the capacitance is filtered, and the DC voltage is output for cooling the semiconductor refrigeration module and exhausting the fan. At the same time, the refrigeration indicator lights up. Since the direct-cooled hot and cold water dispenser does not have an automatic temperature control, the refrigeration indicator light is always on after the power is turned on. Press the heating switch, the heating indicator lights up, the heating tube heats up, and the water in the hot tank warms up. When the water temperature reaches the set temperature, the thermostat contacts are disconnected, the heating power is automatically cut off, the heating lamp is extinguished, and the heating tube stops heating. When the water temperature drops to the set temperature, the thermostat contacts are closed, the heating power is automatically turned on, the heating indicator is on, and the heating tube heats up. After that, the above process is repeated to keep the water temperature constant at 85-95°C. · Thermoelectric water dispenser Thermoelectric cooling, also known as thermoelectric cooling or semiconductor cooling, is a method of cooling that uses thermoelectric effects. The advantage of the compression refrigeration water dispenser is that it is not affected by the ambient temperature, and it can be cooled to about 3 to 10 degrees at any time and place. The continuous low temperature produces a lot of cups, and domestic household refrigerators mostly use this method. The disadvantage is that it is bulky and the price is higher than electronic refrigeration. At present, semiconductor materials are used to make N-type and P-type thermocouples, and semiconductor cooling devices are formed by the method of modules. N-type materials have redundant electrons and have negative temperature difference potential. P-type materials have insufficient electrons and positive temperature difference potential; When the electrons pass from the P-type through the junction to the N-type, their energy must increase, and the increased energy corresponds to the energy consumed by the junction. On the contrary, when the electron flows from the N-type to the P-type, the temperature of the junction It will rise. Press the heating switch, the heating circuit is connected, the red heating indicator lights up, the heating tube heats up. When the water temperature rises to the set temperature, the thermostat is reset automatically, the power is turned off, and the red heating indicator goes out. Insulation conditions. After the power is turned off, the water temperature gradually decreases. When the temperature drops to the set temperature, the contact of the thermostat is closed and the power is turned on. The red heating indicator lamp is on and the heating tube heats up again. In this way, the water temperature is controlled between 85-95°C. The relevant information about the cooling water dispenser was introduced here for everyone. I hope this article will help you. 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