A Peltier element is the same as a thermo-electric module. When the direction of the DC current is changed, the cold side and hot side switch. The Peltier element achieves highly accurate temperature control because one side can be used for both cooling and heating. A cooling device with the Peltier element is small in volume and does not generate noise or vibration. In addition, it is environmentally-friendly because it uses no corrosive liquid or ozone-destroying refrigerant gas. The Peltier element is widely used for medical refrigerators, wine cellars, and CPU coolers.
