Analytical Instruments

Combined Refrigerators and Freezers are laboratory devices that are used to preserve biological samples by using a refrigerant to remove the heat from the material and transfer it to the surroundings. In combined refrigerators and freezers, the refrigerant heats the compressor, and a hot coolant is passed through an expansion valve which expands the coolant and converts it into cold gas. This cold gas is further passed through expansion coils which absorb the heat from materials. Lastly, the refrigerant evaporates and flows back again to the compressor where the cycle repeats itself which results in the cooling of the environment.