Research on the Measurement and Calibration Method of the Walk-in High and Low Temperature Humidity Test Chamb Part A

Research on the Measurement and Calibration Method of the Walk-in High and Low Temperature Humidity and Heat Test Chamber

    At present, the walk-in high and low temperature damp heat test chamber is widely used in various industries in our country, and the research on its measurement standard method is very important. In recent years, people have paid more and more attention to its research and application. The relevant performance test of the walk-in high and low temperature damp and heat test box shows that the space performance of the walk-in high and low temperature damp and heat test box is good. If the walk-in high and low temperature damp and heat test box provides a better test environment for testing, it can be used in automobiles. It is widely used in industries such as aviation, petrochemical and other industries to promote the development of scientific research in our country and promote the improvement of science and technology. Therefore, it is very important to research and apply the standard method of walk-in high and low temperature damp heat test chamber.

    1 Overview of the work of the walk-in high and low temperature damp and heat test chamber

    1.1; Analysis of the working principle of the walk-in high and low temperature damp heat test chamber

In the application process of the walk-in high and low temperature damp heat test chamber, it is necessary to fully understand its working principle and related knowledge, and the relevant content of the measurement and calibration of the walk-in high and low temperature damp heat test chamber should be clarified. The walk-in high and low temperature damp heat test chamber is composed of a heat preservation test chamber, air circulation, humidification, heating system, refrigeration and dehumidification system, safety protection system and cooling circulation system, and its components are relatively complex.

      (1) When the walk-in high and low temperature humidity and heat test chamber is in the working environment of low temperature equipment, the refrigerant in its evaporator will evaporate and absorb heat in the treatment room during the air treatment process, thereby keeping the air at a lower temperature. In the research and application process of the walk-in high and low temperature damp heat test chamber, attention should be paid to the effective control of its programmed intelligent control instrument and the heat output of the heating system, and attention should be paid to the constant cooling and thermal compensation of the walk-in high and low temperature damp heat test box Effective control of constant temperature. The wind speed of the constant temperature air in the walk-in high and low temperature damp heat test box will be adjusted by frequency conversion when passing through the centrifugal fan, and then the adjusted air will be sent into the high and low temperature heat preservation test box, and let it be carried out in the heat preservation test box. Processing and exchange of thermal energy. The air that has undergone heat and energy exchange enters the air treatment chamber from the tuyere. After treatment, the heat is exchanged in the evaporator and heater of the walk-in high and low temperature damp heat test chamber, and then enters the next circulation system.

      (2) When the walk-in high and low temperature damp heat test chamber is in the working environment of high-temperature equipment, the thermal energy output of the heating system controlled by the programming intelligent controller of the walk-in high and low temperature damp heat test box will be thermally compensated in the process. Constant temperature control. After reaching the temperature requirement, the air passes the centrifugal fan frequency conversion to adjust the wind speed, and sends the treated air into the heat preservation test box, and then allows it to perform heat conversion in the heat preservation test box. The air after the heat conversion will enter the air treatment chamber from the return air duct, and then convert the energy at the heating place, and then enter the next cycle.

      (3) When in the working environment of hot and humid equipment, the walk-in high and low temperature humidity and heat test box can be programmed to control the output of the heating system, the humidification output of the humidification system, the cold output of the dehumidification system, and the constant temperature of heat or humidity compensation. . In the working process, the temperature of the air returning from the working room and the dehumidifying surface cooler in the air treatment room is adjusted, and then the heater and humidifier are used for heat compensation or humidity compensation. When the air in the walk-in high and low temperature damp and heat test box reaches the requirements of temperature and humidity, the air is controlled by a centrifugal fan to control the wind speed, and then the air is sent into the test box through the tuyere of the walk-in high and low temperature damp and heat test box. Heat conversion inside, after conversion, enter the walk-in high and low temperature humidity and heat test chamber air treatment room from the return air duct, and then convert the heat at the heater, dehumidification surface cooler and humidifier, and enter the next one Circulatory system.