Car refrigerator cooling fan

The car refrigerator (electronic hot and cold box) is a refrigerator that can be cooled and heated by using the Peltier effect principle (thermoelectric effect). The so-called Peltier effect means that when two different conductors are connected and connected to a DC power supply to form a loop, the phenomenon of heat absorption or heat release occurs at the junction of the two conductors, and the heat absorbed or released is only It is related to the properties of the two conductors and the temperature of the junction, but has nothing to do with the other parts of the conductor. This effect is also reversible, that is, when the current changes, the original end of heat absorption becomes the end of heat release, and the original end of heat release becomes the end of heat absorption.
Its main features are as follows:
1. The working state is DC 12V, which can be directly connected to the car cigarette lighter.
2. Because it is electronic cooling and heating, there is no compressor, and it can be placed at will. Tilting or inverting will not affect the performance of the product.
3. Because it is a hot spot refrigeration (thermoelectric refrigeration), the ventilation must be good, and the air duct must not be blocked, which will affect the performance of the product.
4. It can be used for cooling or heating. Toggle the switch to change the direction of the current, so as to reversely adjust the cold and hot surfaces of the cooling plate, so as to achieve the purpose of cooling and heating in the box.
5. In the heating state, the side of the conductive block is equipped with a temperature protector, so that when the temperature of the conductive block reaches 85 degrees, the power is automatically cut off; when the temperature drops, the power is automatically turned on. In the cooling state, the protector does not work.
6. Because it is thermoelectric cooling, its cooling effect is closely related to the ambient temperature, and the cooling effect of the ambient temperature changes greatly, but the cooling effect is always lower than the ambient temperature of 17-25 degrees.
7. A built-in switching power supply can be installed to convert the household AC 220V voltage into a DC 12V voltage, which can be suitable for the needs of the family, so that it can be used for home or car.
8. For cars with a length of more than 5.5 meters, because they are powered by DC 24V, they must be equipped with a converter.
9. The biggest feature of hot spot refrigeration is its long service life. Under normal circumstances, its service life can reach 80,000 hours.
10. For dual-purpose products equipped with a built-in switching power supply, the service life of the switching power supply is 5000 hours, so when it is found that the AC is not working, the switching power supply must be checked and even replaced.
11. For liquid crystal display and computer-controlled products, it is equivalent to installing an electronic thermostat. The user only needs to set the required temperature (according to the ambient temperature, the temperature difference is 17 to 25 degrees), and the controller will automatically follow The ambient temperature is used to determine whether it is cooling or heating, without manual adjustment. Example: If the ambient temperature is 15 degrees, when the set temperature is 0 degrees, the refrigerator will automatically refrigerate, when the temperature reaches 0 degrees, it will stop working, and when the temperature rises, it will start working again, and its action range is 2 to 4 degrees. ; When the set temperature is 20 degrees, the refrigerator will automatically heat, when the temperature reaches the requirement, it will stop working, and start working again when the temperature drops; if the refrigerator needs to automatically switch from cooling to heating or from When the heating is switched to cooling, in order to avoid sudden cooling and sudden heating, an interval of 5 minutes is set in the middle, and it will automatically switch after 5 minutes.
12. In order to protect the refrigeration fins, the refrigeration cannot be switched to heating all at once. There must be a minimum of 5 minutes between cooling and heating, otherwise it will cause the refrigeration fin to burst.