Due to the complexity of the high and low temperature tester itself, there are many problems in the operation of the equipment, and the problems cannot be solved in time, which greatly prolongs the test cycle and affects the development of products. The reason for these phenomena is the lack of understanding of the working principle of the comprehensive test chamber. Therefore, we have made some brief explanations on the basic working principle of the equipment, and introduced how to analyze and judge the failure of the equipment.
1. Since the refrigeration cycle adopts the reverse Karo cycle, the cycle is composed of two isothermal processes and two adiabatic processes, and the refrigerant is compressed to a higher pressure by the compressor adiabatic insulation, and the exhausted work increases the exhaust temperature.
2. After the refrigerant of the high and low temperature tester is exchanged with the surrounding medium in the isothermal ground of the condenser to transfer the heat to the surrounding medium, the refrigerant expands through the shut-off valve to do work, and the temperature of the refrigerant decreases.
3. Finally, the refrigerant absorbs heat from the object with higher temperature through the evaporator isothermally, so that the temperature of the cooled object is reduced. This cycle repeats itself to achieve the purpose of cooling.
The design of the refrigeration system of the high and low temperature tester applies energy regulation technology, which can not only ensure the normal operation of the refrigeration test unit, but also effectively adjust the energy consumption and refrigeration capacity of the refrigeration system, so that the refrigeration system can be kept in the best operating state, and finally achieve a dynamic equilibrium.