High and low temperature test chamber use
High and low temperature test chamber: This instrument is suitable for high and low temperature reliability test of industrial products. For the parts and materials of related products such as electronic and electrical, automobile and motorcycle, aerospace, ship weapons, universities, scientific research units, etc., in the case of high and low temperature (alternating) cyclic changes, test their performance indicators. The product has a wide temperature control range, and its performance indicators have reached the technical requirements of the national standard GB10592-89 high and low temperature test chamber, which is applicable to the environmental test test A: low temperature test method according to GB2423.1, GB2423.2 B: High temperature test method" The product is subjected to low temperature, high temperature test and constant temperature test. Products meet GB2423.1, GB2423.2, GJB150.3, GJB150.4, IEC, MIL standards.
High and low temperature test chamber working principle
Refrigeration working principle: The refrigeration cycle adopts reverse card cycle, which consists of two isothermal processes and two adiabatic processes. The process is as follows: the refrigerant is adiabatically compressed to a higher pressure by the compressor, and the exhausted work is exhausted. The temperature rises, after which the refrigerant is isothermally exchanged with the surrounding medium through the condenser to transfer heat to the surrounding medium. After the refrigerant is adiabatically expanded by the shut-off valve, the temperature of the refrigerant is lowered. Finally, the refrigerant absorbs heat from the higher temperature object isothermally through the evaporator, so that the temperature of the object to be cooled is lowered. This cycle is repeated to achieve the purpose of cooling. The refrigeration system of this test chamber uses a unit of Freon refrigeration system consisting of a French-made Taikang fully enclosed compressor. The design of the refrigeration system uses energy-adjusting technology to ensure the normal operation of the refrigeration unit and to effectively adjust the energy consumption and cooling capacity of the refrigeration system to keep the refrigeration system in optimal operation. Balanced temperature regulation (BTC) is adopted. When the refrigeration system is in continuous operation, the control system controls the output of the heater according to the result of the PID automatic calculation output according to the set temperature point, and finally achieves a dynamic balance.
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