The influence of repeatedly opening the door during the low temperature test—1
The extreme low temperature test of -70°C has been carried out in the high and low temperature test chamber. The door of the test box is opened at this time, the cold cyclone will overflow the test chamber first, if we touch the inner surface of the test chamber or the sample to be tested without taking any safety precautions, which will cause frostbite to us, In severe cases, muscle fibers at the location of frostbite may even atrophy.
The influence of repeatedly opening the door during the low temperature test—2
In addition, opening the door of the test chamber at extremely low temperature will cause frost on the evaporator, which will directly affect the overall cooling effect of the test chamber, and even cause compressor failure/damage.
The influence of repeatedly opening the door during the high temperature test
A high temperature test of 150°C has been carried out in the high and low temperature test box. When the door of the test box is opened, the high temperature gas will rush out of the test box in an instant. If no safety protection is done, it is very likely to burn our face. If there are flammable substances with extremely low fire points nearby, which can even cause a fire.
Conclusion 1
Therefore, during the operation of the high and low temperature test box, do not open the door of the test box if it is not necessary; if necessary, please take comprehensive safety protection measures and open the door of the test box in an appropriate way.
Conclusion 2
If the test stipulates that the test chamber door must be opened to remove the sample, there is a solution – a double door design. One door is an external door, thermal insulation, airtight, and has a window; the other door is inner door, made of epoxy board or fully transparent rigid plastic board, and a hole of suitable size is given in the middle of the door, then it is convenient for taking and placing the sample; this design reasonably blocks the immediate exposure of the tested sample, and also helps to maintain the accuracy of the temperature in the test chamber.
