Refrigeration mechanism and principle of high and low temperature test chamber
2022-08-12
Refrigeration mechanism and principle of high and low temperature test chamber:
Refrigeration system and compressor: In order to ensure the cooling rate and minimum temperature requirements of the test chamber, the refrigeration system of this test chamber adopts a cascade refrigeration system composed of imported compressors. Easy maintenance and other advantages;
Refrigeration principle: The refrigeration cycle adopts the reverse Carnot cycle, which consists of two isothermal processes and two adiabatic processes. The process is as follows: The refrigerant is adiabatically compressed by the compressor to a higher pressure, which consumes work to make the exhaust temperature. After rising, the refrigerant exchanges heat with the surrounding medium isothermally through the condenser to transfer heat to the surrounding medium. After the refrigerant does work through adiabatic expansion through the shut-off valve, the temperature of the refrigerant decreases. Finally, the refrigerant absorbs heat from the higher temperature object isothermally through the evaporator, so that the temperature of the cooled object decreases. This cycle repeats itself to achieve the purpose of cooling;
Defrosting method: The low temperature room is automatically defrosted, and the high temperature and high pressure gas at the exhaust end of the compressor is introduced into the refrigeration evaporator through the automatic switching of the solenoid valve, so that the surface temperature of the evaporator rises, and the condensed water is discharged outdoors.
Refrigeration method: double-machine cascade refrigeration;
The design of the refrigeration system uses energy regulation technology. An effective treatment method can not only ensure the normal operation of the refrigeration unit, but also effectively adjust the energy consumption and cooling capacity of the refrigeration system, so as to reduce the operating cost of the refrigeration system. down to a more economical state;
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