Ultra-low Temperature Refrigeration Unit

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Ultra-low temperature refrigeration unit The principle of refrigeration of cascaded cryocooler

    Ultra-low temperature refrigeration unit. The cascade refrigeration system consists of a high temperature part and a low temperature part. The low temperature part provides the required cryogenic capacity, and low temperature refrigerants such as R13 and R23 are used, but the condensation temperature of such refrigerants is very low, and it is difficult to condense them with cooling water under the same pressure. The high temperature portion uses a medium temperature refrigerant cycle, which functions to condense the low temperature refrigerant, and the high temperature portion and the low temperature portion share an evaporation condenser and "fold" to form a cascade refrigeration cycle using the two refrigerants.
   The production process requires a reaction temperature of -50 ° C, so the cryogenic unit can fully meet the large-scale cooling requirements of the process requirements.

Cryogenic unit maintenance
     The maintenance of the cryogenic unit plays a key role in the stable operation of the equipment. Therefore, a complete maintenance system must be established. The following points are introduced for this aspect:

     (1) Maintenance personnel must undergo professional training, and must fully grasp the principle and performance of the equipment;

     (2) The equipment should be inspected, maintained and maintained in strict accordance with the prescribed cycle, and the operation and maintenance personnel should be relatively fixed;

     (3) The control components and sensing components of the equipment must be periodically verified to provide effective safety protection for the unit and to obtain objective operational raw data;

     (4) The refrigerant and refrigeration oil required for the equipment should be filled according to the grades and quantities specified in the operation manual. The grades of refrigerant and refrigeration oil should not be replaced at will. The filling amount of low-temperature refrigerant should be strictly controlled. Generally, it should be 0. .lkg is a unit of measurement and must not be overfilled.

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