What is a cascade / two element compressor and what is its working principle?
Cascade refrigeration refers to the cycle system of cascade refrigeration machines. The working principle is as follows:Cascade refrigerators are usually made up of two separate refrigeration systems, called high temperature and low temperature parts.The high temperature part uses medium temperature refrigerant, and the low temperature part uses low temperature refrigerant. High temperature refrigerant system is part of the evaporation condensation of the refrigerant is used to make the low temperature part of the system, a condensation evaporator will be linked to the two part, it is the high temperature part of the condenser and evaporator, the low temperature part.The lower part of the refrigerant in the evaporator to absorb heat by cooling the object (i.e. get cold), and the heat to high temperature refrigerant, and then by the high temperature part of the refrigerant heat to the cooling medium (water or air).
The two compressors are folded together so that the cooling effect will be better and can be below 50 degrees below zero
The cascade compressor is relative to a unitary compressor.A cascade compressor is a compression refrigeration system consisting of two or more than two unipolar compressors.A cascade compressor consisting of two single stage compressors is called a two yuan compressor. A compressor consisting of three single stage compressors is called a three yuan compressor. And so on。
The common cascade compressor is also called two yuan compressor. The utility model is composed of two compressors folded together, and is divided into two stages of refrigeration. Two yuan compressor is often used in lower temperature box or hot and cold box. Cascade compressors are more expensive and more time-consuming to install.Working principle：1, two compressors are divided into two grades, the first compressor is first, and the second compressor is second stage;The evaporator of the 2 and first stage compressors is superposed with the radiator of the second stage compressor. The former cools the latter and reduces the compression burden of the second stage compressor;The 3, first and second refrigerants are different from the compressor power, usually the first compressor is smaller.
