Traditional air conditioning and refrigerator refrigeration technology using freon or other compounds to achieve refrigeration, freon or other compounds formulations of leakage, the surrounding environment will cause some pollution, more importantly, these refrigerants on the atmospheric ozone layer has a strong destructive effect, has been Have been eliminated. The modern high-tech semiconductor refrigeration technology, without any refrigerant, only the use of semiconductor Peltier effect can be achieved cooling. In today's efforts to protect the global environment, research and development of a superior performance, environmentally friendly refrigeration technology has become the world's refrigeration technology research in the field of an important issue. So the semiconductor refrigeration technology has broad prospects for development. The thermoelectric effect of the conductor mainly includes the Seebeck effect, the Peltier effect, the Thomson effect, the Joule effect and the Fourier effect. While the semiconductor refrigeration technology is the use of the Peltier effect.