With the popularity of cars, cars are no longer a simple and convenient tool to shelter from the wind and rain. Being more comfortable, safer and more intelligent has become the development trend of market and technology. In the future, cars will become a mobile space integrating office, rest and entertainment. Refrigerator has become an essential household appliance in daily life. However, car refrigerator is still a strange car product for most consumers.
L what is a car refrigerator
Car refrigerator is the continuation and function expansion of household refrigerator. It has the function of low-temperature or constant temperature storage of food, drugs and cosmetics during outdoor travel. It also has the characteristics of low power consumption, no pollution and low noise. The on-board refrigerator expands the use space limitation of traditional refrigerators, meets people's demand for refrigerators for outdoor travel, and further improves the convenience and quality of life brought by automobile consumption.
Based on the diversified needs of consumers, in addition to the refrigeration / freezing function of the traditional refrigerator, the on-board refrigerator can also increase the heating function, which can derive multiple types and uses. For example, the car beauty cosmetic thermostat specially designed for women can store various kinds of cosmetics such as lipstick and mask at constant temperature. Wine / champagne storage incubator customized for high-end business vehicles; Vehicle mounted multifunctional partition incubator to meet the needs of mothers and infants. With the popularity of car refrigerators and the continuous maturity of the consumer market, more car refrigerators with functional characteristics will appear in the market in the future.
L differences between car refrigerator and traditional refrigerator
Compared with traditional household refrigerators, vehicle refrigerators are more stringent in use environment, electrical environment, functional requirements, volume and weight.
1. Due to the space limitation in the vehicle, the volume of the on-board refrigerator must be compact and meet the volume requirements at the same time.
2. The automobile service environment is extremely harsh, such as high temperature in summer, severe cold in winter, various vibration bumps, etc. the on-board refrigerator must pass multiple Automobile standard tests such as harsh temperature and humidity environment and mechanical vibration to ensure the reliability of the product.
3. The on-board refrigerator needs to pass the electromagnetic compatibility (EMC) test to ensure that the refrigerator and other electronic products in the vehicle will not produce electromagnetic interference, which will affect the normal operation.
L technology and characteristics of vehicle refrigerator
At present, the vehicle refrigerator technology mainly includes thermoelectric semiconductor refrigeration technology and compression refrigeration technology. There are essential differences in the working principle between the two, resulting in different technical characteristics.
Compression refrigeration is a refrigeration method using the reverse cycle of Carnot principle, that is, refrigeration cycle. Compression refrigeration uses the heat absorption and release phenomenon of refrigerant with low boiling point in the process of gas-liquid phase change to realize refrigeration. The whole process includes suction and compression of the compressor, exothermic condensation (heat dissipation) of the condenser, throttling and pressure reduction of the throttle valve, endothermic vaporization (refrigeration) of the evaporator. Therefore, compression refrigeration contains four core components, namely compressor, throttle valve, condenser and evaporator, and its volume is generally large. At present, compression refrigeration technology is relatively mature, with high refrigeration efficiency and refrigeration capacity of - 18 ℃. However, due to the volume limitation of the compressor refrigeration system, the size of the on-board compressor refrigerator is usually large, which is more suitable for the large volume on-board refrigerator with large layout space.
Semiconductor refrigeration uses thermoelectric semiconductor "Peltier effect" for refrigeration, also known as electronic refrigeration. Semiconductor refrigeration belongs to electronic physical refrigeration. As shown in Figure 1, it does not use refrigeration working medium and mechanical moving parts at all, so as to completely solve the application problems that cannot be solved by mechanical refrigeration refrigerators such as medium pollution and mechanical vibration. It is a real green environmental protection refrigeration technology.
Semiconductor refrigerator can be directly controlled by direct current, with fast temperature response, and can be switched to heating mode when the current is reversed. Therefore, one of the advantages of this refrigerator is that it can both cool and heat, which is very suitable for constant temperature control. However, limited by the maximum capacity of semiconductor refrigeration, semiconductor refrigerators usually only have refrigeration capacity, not refrigeration capacity.
Semiconductor refrigeration devices are small in size, only a few millimeters in height, tens of millimeters in length and width, and only one tenth of the volume and weight of micro compressors. Therefore, the semiconductor refrigeration system occupies a small space in practical application, is easy to arrange, and is suitable for narrow space applications. Due to the limitation of the internal layout space of the vehicle, the micro compressor refrigeration system has a large volume and is extremely inconvenient to be arranged. Some occasions with small space (such as seat armrest) can not even be used. The small volume and light weight of semiconductor refrigeration system make it show irreplaceable advantages in small space application.
Another advantage of semiconductor refrigerator is that compared with compressor refrigeration system, the cost of semiconductor refrigeration system is greatly reduced. This makes the large-scale application of vehicle refrigerator possible.
L semiconductor car refrigerator
Zhejiang hanheng Thermoelectric Technology Co., Ltd., subordinate to Ferrotec China group, focuses on thermoelectric semiconductors and their applications. As a world leader in thermoelectric semiconductor technology, we have always been committed to providing cutting-edge thermal management solutions for global automotive customers. At present, the main products include R & D, production and sales of a full range of automotive temperature control products such as thermoelectric seat air conditioning system, hot and cold cup holder, on-board refrigerator, warm air conditioning, driverless lidar and so on. Hanheng products have the characteristics of high reliability, good stability, strong consistency, long service life, fast refrigeration speed, good time response and high efficiency. They are widely used in automobile, communication, medical treatment, aerospace and other fields.
Relying on the advanced semiconductor refrigeration system and innovative thermal insulation design developed by the company, hanheng semiconductor vehicle refrigerator has faster temperature rise and fall speed, longer thermal insulation and cold insulation time, and better meets the needs of vehicle users. In addition, the product has a variety of functional designs such as vehicle communication, led atmosphere lamp, touch control and temperature display interface. The reliability and durability of the product have passed the rigorous automobile industry standard test and verification. At present, it has established cooperative relations with many main engine manufacturers such as great wall, SAIC and Geely.
Hanheng's customer-oriented service concept and continuous technological innovation will continue to provide customers with high-quality products and efficient technical services.