Multifunctional Mini Box Use as a Heating and Chilling

In the field of military and medical science there are refrigerators used to cool product or specimens for preservation. They consist of refrigeration units for storing blood plasma and other blood products, as well as vaccines and other medical or pharmaceutical components. They differ from standard refrigerators used in household or restaurant because they need to be very hygienic and fully reliable. However, in case of transportation of component from one place to another place there is no refrigeration system. Due to such problem, portable Refrigeration system is to be used. Thermoelectric refrigeration is new alternative because it can convert waste electricity into useful cooling, is expected to play an important role in getting today fossil energy challenges. Therefore, thermoelectric refrigeration is greatly needed, particularly for developing countries where long life and low maintenance are necessary. Thermoelectric components are solid state devices. They are reliable energy converters and have no noise or vibration as there are no mechanical moving parts. They have less size and are small in weight. As refrigerators, they are friendly to the environment as CFC gas or any other refrigerant gas is not used. Due to these advantages, the thermoelectric devices have found a more range of applications. In this paper, basic knowledge of the thermoelectric devices and an overview of these applications are given.