Control system of the hottest temperature impact t

Control system of temperature shock test chamber

cooling system of temperature shock test chamber:

1. Refrigeration system and compressor: in order to ensure the cooling rate of the test chamber and the requirements of the lowest temperature in the foreseeable future, this test chamber adopts a binary cascade water-cooling system composed of a set of imported German GuLun semi closed compressor. The cascade refrigeration system includes a high-temperature refrigeration cycle and a low-temperature refrigeration cycle, and its connecting container is the evaporative condenser. The evaporative condenser also plays the role of energy transfer, transferring the heat energy in the studio through the two-stage refrigeration system to achieve the purpose of temperature rise. Energy regulation technology is applied in the design of the refrigeration system. An effective treatment method can not only ensure the normal operation of the refrigeration unit, but also effectively regulate the energy consumption and refrigerating capacity of the refrigeration system, so that the operation cost and failure rate of the refrigeration system can be reduced to a more economical state

2. Working principle of refrigeration: both high and low refrigeration cycles adopt inverse Karnaugh cycle, which is composed 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 work is consumed to raise the exhaust temperature. Then the refrigerant is isothermal exchanged with the surrounding media through the condenser, and the heat is transferred to the surrounding media. After the refrigerant is adiabatic expanded by the valve to do work, at this time, many customers of the refrigerant have been inquiring about the temperature reduction of Bochuang bu6800 new machine. Finally, the refrigerant absorbs heat isothermal from the object with higher temperature through the evaporator, so that the temperature of the object to be cooled is reduced. This cycle has three control modes: stress control, strain control and displacement control, and it starts again and again, so as to achieve the purpose of cooling

3. Refrigerant: R502 (high temperature cycle) and R23 (low temperature cycle) of DuPont company are used

4. Auxiliary parts: expansion valve (American Sportan), solenoid valve (Italian Castel); Filter (American Sportan); Pressure controller (Anglo American RANCO); Refrigeration accessories such as oil separator (alco in Europe and America) are imported

air conditioning system of temperature impact test chamber

the design of air conditioning fixture increases the difficulty of the way: forced ventilation internal balance temperature regulation (BTC). This method means that under the condition of continuous operation of the refrigeration system, the control system controls the output of the heater according to the set temperature point through the results of PID automatic operation, and finally achieves a dynamic balance

1. Air circulation device: built-in air conditioning room, circulating air duct and long shaft centrifugal fan, use efficient refrigerator and energy regulation system, and effectively exchange through efficient ventilator to achieve the purpose of temperature change. By improving the air flow, the air flow and the heat exchange capacity with the heater and air surface cooler are improved, so the temperature uniformity of the test chamber is greatly improved

2. Heating method: high quality nickel chromium alloy wire electric heater

3. Air cooling method: multi-stage diaphragm air heat exchanger

source: Shanghai Linpin Instrument Equipment Co., Ltd