What is the difference between the high and low temperature alternating damp heat test chamber when testing heat dissipation and non-heat dissipation samples?
Regarding experimental regulations and main parameters, people can choose different types of temperature and humidity product series, but people have strict regulations on the selection of environmental test equipment for different experimental samples. Next, people will use the heat dissipation of the experimental sample to understand the application comparison and experimental method of the high and low temperature alternating damp heat test box.
1. Non-heat-dissipating experimental samples and heat-dissipating experimental samples:
During the standard experiment period, when the temperature of the test sample exceeds a stable level, the hot spot temperature on the surface of the test sample is about 5 degrees higher than the surrounding air temperature when accurate measurement is performed under the random air standard (that is, there is no forced air circulation system). On the contrary, it is a non-heat-dissipating test product. For all storage experiments and the test period without power supply or no load, the test product is a non-heat-dissipating test product, and the experiment uses the ultra-low temperature test method.
2. Non-heat dissipation test product:
Sudden temperature change test chamber temperature gradient experiment
①Sudden temperature change experiment: first adjust the temperature of the high and low temperature alternating damp heat test chamber to the required experimental temperature, and then put the experimental sample with indoor temperature. This kind of experimental method is suitable for the known sudden temperature change without causing actuality to the experimental sample During operation.
②Temperature gradient experiment: first put the test sample with indoor temperature into the test box of the same indoor temperature, and then start the cold storage to slowly cool the temperature in the box to the required test temperature. If the test sample is too large or too large If it is too heavy, or because of the complicated effect of the experiment wiring, it is not guaranteed to put it in the low temperature box without causing frost during the sudden change experiment, the experiment ② should also be used.
3. Heat dissipation test sample with and without forced air test:
The way to ensure the fluctuation of precision in the manufacturing industry is to choose the wind circulation system method. The centrifugal fan is driven by the motor to cause the wind circulation system to generate wind inflow. The experiment without forced air circulation system is an experiment that simulates the harm of random air standards. , It is more suitable for the detection of heat-dissipating experimental samples. For experiments with forced air circulation systems, when it is difficult or impossible to ensure the required experimental standards without using forced air circulation systems, two methods with forced air can be used: A and B. A. When the test chamber is large enough that no forced air circulation system is required, the experimental regulations can be considered, but the required ultra-low temperature cannot be maintained without the forced air circulation system in the box, that is, the refrigeration or heating regulations of the high and low temperature test chamber are selected When forced air circulation system.
I firmly believe that whether the heat dissipation of the three test products is based on the test box adopting standards and the selection of experimental methods, everyone has a clearer grasp of the selection of high and low temperature alternating damp heat test boxes!
May 27, 2022
