The thermoelectric cooler adopts 12710 heat dissipation module, which has better heat dissipation effect. The cooling block has a larger area and can contact more air for rapid cooling. It can be used to make small refrigerators, mini ice air conditioners or computer cooling equipment. There are four heat-dissipating copper pipes inside, which can quickly dissipate heat, thereby improving the cooling efficiency. After the foam box test, the cooling end is -1 degree