Multi-stage diaphragm air heat exchanger
The two-chamber cold and hot shock test chamber has built-in air conditioning room, circulating air duct and long-axis centrifugal fan. It uses high-quality refrigerators and energy regulation systems to effectively exchange air through high-quality fans to achieve the purpose of temperature change.
By improving the airflow of the air, the air flow and the heat exchange capacity with the heater and the air surface cooler are improved, thereby greatly improving the temperature uniformity of the cold and hot shock test chamber.
In order to ensure the cooling rate and temperature requirements of the test chamber, the test chamber adopts a binary cascade water-cooled refrigeration system composed of a semi-hermetic compressor imported from BITZER from Germany. It includes a high-temperature refrigeration cycle and a low-temperature refrigeration cycle. The connecting container is an evaporative condenser. The evaporative condenser also plays the role of energy transfer, and transfers the heat energy in the work room through the two-stage refrigeration system to achieve the purpose of cooling.
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 refrigeration capacity of the refrigeration system, so that the operation of the refrigeration system can be effectively adjusted and costs and failure rates can be reduced to a more economical state.
Both high and low refrigeration cycles adopt the reverse Carnot cycle, which consists of two isothermal processes and two adiabatic processes.
The process is as follows: the refrigerant is compressed adiabatically by the compressor to a higher pressure, which consumes work to increase the exhaust temperature, and then the refrigerant exchanges heat with the surrounding medium isothermally through the condenser, and transfers 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 is repeated to achieve the purpose of high temperature and low temperature impact test.