Design of refrigeration system for temperature and humidity test chamber
The refrigeration system of the temperature and humidity test chamber is one of the three main systems, and the other two systems are the control system and the heating system. In the equipment, the refrigeration system achieves the cooling effect of the product through the refrigeration cycle, thereby achieving the purpose of cooling.
A refrigeration system is a system that uses external energy to transfer heat from a lower temperature substance or environment to a higher temperature substance or environment. It is called a refrigeration system and can be divided into a vapor refrigeration system, an air refrigeration system, and a thermoelectric refrigeration system. The vapor refrigeration system is further divided into a vapor compression type, a vapor absorption type, and a vapor injection type. Its main components are composed of refrigerant and four large parts. The four main parts are compressors, condensers, expansion valves and evaporators. There are many types of refrigerants, but now they are mostly used with Freon 12 and 22, Refrigerant such as R410A.
In order to ensure the requirements of the test chamber for the cooling rate and the minimum temperature, the temperature and humidity test chamber uses a cascade refrigeration system composed of imported compressors. The refrigeration system has the characteristics of reasonable matching, high reliability, convenient use and maintenance, etc. . In addition to this, it also has energy-saving design. In addition to fully considering the safety protection of the refrigeration unit and the high-efficiency application, multiple energy-saving measures have been taken at the same time, such as the cooling capacity adjustment of the refrigeration system and the gas-liquid side. Road regulation, evaporation temperature adjustment, etc., can be used at any low temperature point, without the need for heating balance, can reduce the operating power to half.
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