In the closed circuit with two different metals, if the temperature of the two contact points keeps different, electric potential difference will generate and at the same time, there will be current through the closed circuit, which is called Seebeck effect. Conversely, in the same closed circuit, when the direct current is supplied, one contact point becomes cold and the other one gets hot, which is called Peltier effect or thermoelectric effect. This phenomenon can directly lead to the inventi...(more)
With the rapid development of science and technology, technical difficulties about material system and manufacturing technology have been solved. At home, there has been ceramic technology to produce the TEC cooling materials and the standard of the materials can be in the international advanced level. Whats more, the merit of figure of high efficient TEC with Chinas independent intellectual property rights has improved a lot and can be over 1310-3K. Now when in the temperature difference of 50℃...(more)
Thermoelectric cooler (TEC) is an ancient technology. As early as in the 1950s, TEC has once set off a boom. When it is connected to a power supply, it can become cold, which is very popular among home appliance manufacturers. However, because of the poor performance of components, it failed to be applied in actual life. The key, which determines the rise of decline of materials and process of TEC, is to improve figure of merit and the cooling effect of the hot and cold end. In order to meet the...(more)
CPU of computer is a high density heating element. Based on the cooling principle of thermoelectric cooler (TEC), the cold end of TEC is in contact with the display chip and the hot end is in contact with the heat sink . When connecting a power supply, the temperature difference of the cold and hot end will come out and moves from the cold end to the hot end through lattice energy. Only if the hot end heat can be dissipated effectively, the cold end will be cooling constantly and the cooling eff...(more)
1.Using endothermic phenomenon of material melting When a material is melting, it will absorb the heat from the hot end of thermopile in the isothermal condition. The isothermal characteristic is the necessary condition of maintaining the cold end constant. The time for the melting stage is the temperature constant time of the cold end. Because of different material thermal conductivities, the heat transfer temperature difference is also different, the thermal conductivity is low and the tempera...(more)
In some specified applications, the main method is to use a special high thermal conductive epoxy resin binder. Since the coefficients of thermal expansion of the ceramics of TEC s, heat sink and the cooled object, its not recommended to use epoxy resin binder in large TECs. The detailed steps are as follows: (a) Flat the installing surface of the TEC by lathe machine or polishing method. Although it doesnt need high flatness when using epoxy resin, but usually the surface should be flat as much...(more)
In general, selecting the size of TECs depends on the area of chips, but not bigger than that. Additionally, TEC has a certain thickness, which is put between chip and heat sink. If it is too thick, it will be hard to fix. Fig. 2. Physical photo of TEC Generally speaking, the operating temperature of TEC is about under 50℃, that is: CPU should work in the range of operating temperature. As the maximum temperature difference can be up to 65℃, if the hot end temperature is not over 65℃, in th...(more)
n thermo-electric cooling system, the installation of TECs is very critical. Basic principles should be abided by during installation, or it may result in bad performance and reliability. There are a few factors to be considered in designing and installing the thermo-electric cooling system, as below. TEC s have a high mechanical strength, but a relatively low shear strength. Therefore, do not place TECs in a mechanical system that plays a major supporting role. All the interfaces in the system ...(more)
