Temperature controller is a parts that controls the operation of compressor through temperature sensor. It controls the temperature by adjusting the cooling time. Temperature controller is divided into electronic temperature control and mechanical temperature control. These two are different in temperature detection accuracy, automatic defrosting, maintenance convenience, price and service life.
Electronic Temperature Control And Mechanical Temperature Control
1. Temperature detection accuracy
*NTC thermal sensors or thermocouples are generally used for temperature detection. NTC thermal sensors or thermocouples change with temperature, which will produce corresponding voltage and current changes. The microcontroller can control whether the compressor operates or not by detecting and quantifying the changed voltage and current.
*Mechanical temperature control realizes the temperature control through metal sheet deformation. Due to the different coefficient of thermal expansion of bimetallic sheet, it will deform when heated and therefore switch the compressor on or off. This is a mechanical reaction, so the accuracy is comparatively low, and it is impossible to achieve accurate refrigeration.
Mechanical temperature control refrigerators are equipped with knobs, so they need to be adjusted in different seasons. The higher the gear, the lower the temperature inside the refrigeration. Low gear is used in summer, medium gear is used in spring and autumn, and high gear is used in winter. Why not high gear in summer? Isn't it more necessary to have a low temperature in summer? You should know that the refrigerator works by exchanging heat in the refrigerator with the ambient heat. The larger the temperature difference is, the longer the refrigerator runs. The temperature difference in summer itself is very large, and the compressor needs to work for a long time, so turning on high gear may burn out the compressor. Without knowing that, it is very easy to cause the food to deteriorate or the compressor to be damaged when the environmental conditions change.
2. Whether it has defrosting function
Electronic temperature control can control the heater on the evaporator, so as to automatically remove the frost on the evaporator on a regular basis, while the mechanical temperature control can’t. However, refrigerators with mechanical temperature control can be defrosted by defrosting timer and defrosting heater. When the compressor works for 8 hours in total, the defrosting timer starts to operate. When the temperature rises to 5 ℃, the defrosting temperature controller will be disconnected, and the defrosting heater will stop working.
3. Maintenance convenience
From the above-mentioned characteristics, it is not difficult to see that the mechanical temperature control is easy to maintain because of its simple structure. The structure of the electronic temperature controller is relatively complex, so it is more difficult to maintain.
4. Cost performance
Although the price of electronic temperature control is high, it can automatically defrost the refrigerator, which cannot be achieved by mechanical temperature control. In addition, the service life of the electronic thermostat is longer. In contrast, although the price of mechanical temperature control is low, its service life is shorter. Generally speaking, electronic temperature control is more cost-effective in the long run.
Our refrigerators use electronic thermostats, so our refrigerators can achieve precise cooling and automatic defrosting, giving customers a better experience.
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