The difference between semiconductor car refrigerator and compressor car refrigerator
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One is a semiconductor car refrigerator. Its principle is to rely on electronic chips for refrigeration. P-N junctions composed of special semiconductor materials are used to form thermocouple pairs and produce Peltier effect, that is, a new type of refrigeration method through direct current refrigeration. Refrigeration temperature range -5 to 65 degrees. The advantages of this refrigerator are that it can both cool and heat, is environmentally friendly, pollution-free, small in size, low in cost, free from vibration and noise during operation, and has a long service life. The disadvantage is that the refrigeration efficiency is not high, the refrigeration temperature is affected by the ambient temperature, the refrigeration cannot reach below zero, and the capacity is small.
The other is the compressor car refrigerator. The compressor is the traditional technology of traditional refrigerators, and the cooling temperature is as low as -18 degrees and 10 degrees. High refrigeration efficiency, ice making and preservation, large volume and large capacity, will be the mainstream direction of the future development of car refrigerators. However, this kind of refrigerator is heavier, consumes more power and is more expensive than semiconductor refrigerators. The compressors of compressors for automobile refrigerators are mainly produced in Germany and Japan in the world. The compressors of domestic high-end compressors for automobile refrigerators are mainly from Germany, with good quality.
At present, electronic refrigerators use semiconductor electronic refrigeration and heating. The principle is to use DC current to pass through the semiconductor refrigeration chip, so that heat is transferred from the cold end of the chip to the hot end (Peltier effect) through the cooling fan to improve its effect. In terms of refrigeration function, the temperature of the electronic chip can reach 5 degrees, and the temperature of the chip is transmitted to the inner wall of the refrigerator due to wear and tear. The temperature is often difficult to reach 5 degrees. This temperature is the low temperature critical point that can be reached by current electronic refrigeration.
Electronic refrigerators are usually capable of cooling and heating. The so-called cooling to 5 degrees is an indication of quantification. If the surrounding temperature is relatively high, the temperature difference between the refrigeration degree of the refrigerator and the ambient temperature is generally 15 degrees. A good quality dual-fan car refrigerator can have a temperature difference of 20 degrees. The heating temperature of the refrigerator can usually reach 65 degrees.
The hot and cold refrigerator uses the car cigarette lighter as the power source, and the power consumption of a 15-liter hot and cold refrigerator is 35-40w. It is equivalent to the power consumption of a car light bulb. The battery starts charging the refrigerator when the engine fires. The battery is powered off after the flame is turned off. Better cold and hot refrigerators are equipped with low-voltage protection devices. When the battery power is low, the refrigerator starts to alarm, which can effectively protect the car battery.
From the perspective of compressor refrigerators, many high-end cars in the world have adopted OEM methods to embed matching compressor car refrigerators, which are car refrigerators in the true sense.
Europe, the United States, Japan, South Korea, etc., in response to the needs of many professional enthusiasts and national defense forces, have begun to use car refrigerators with fully enclosed compressors. The refrigeration temperature can reach minus 18 degrees, and the temperature can be controlled in stages. This compressor refrigerator uses traditional reciprocating compressors and rotary compressors. Even if the refrigerator is turned over arbitrarily, the compressor will not be damaged. The compressor adopts fully enclosed, fluorine-free and maintenance-free technology, so that the car refrigerator can operate normally even when it is reversed. Many car rally and cross-country races use this kind of refrigerator.
Compressor refrigerators have become standard in some northern armies in Europe and armies in the Middle East, and it has unique advantages in anti-turbulence and tilt angle. At present, compressor car refrigerators are gradually replacing traditional electronic refrigerators, and the domestic market is also gradually accepting them.