Sealing Problems and Countermeasures of Constant Temperature and Humidity Test Chamber

The constant temperature and humidity test box is based on the construction of high temperature, ultra-low temperature, high low temperature, low temperature drying and other natural environments in the working room, and then carries out high and low temperature tests, high and low humidity aging resistance tests on commodities. It is mainly used for industrial products, such as electronics and electricians, instrument equipment, small cars, motorcycles, colleges and universities and other manufacturing industries.

The constant temperature and humidity test chamber has high temperature detection, ultra-low temperature detection, high and low temperature test cycle system detection, high and low temperature test, high and low humidity and other experimental standards. Under the high temperature standard, such as the extreme high temperature of 130 ℃ and 97% ambient humidity, the pressure difference inside and outside the laboratory has greatly expanded. Now it is difficult to hone the airtightness of the experimental shell. If the airtightness is not good, it will cause serious steam leakage and affect the precision and precision of temperature.

What are the factors that cause the airtightness problem of constant temperature and humidity test chamber?

1、 The constant temperature and humidity test chamber usually has cable holes and air vent holes. The design concept should be very strict. If the design concept and production are not scientific, resulting in too large a gap, the environmental test chamber will not be sealed well. The personal working room at such a hole shall remember to put bottle stoppers and rubber stoppers of appropriate specifications to ensure that the sealing of such a hole is intact.

2、 Difficulties in sealing strip of door of constant temperature and humidity test chamber. We ignore this problem, and think that the sealant strip should be very airtight under the inhibition of the door hinge, because the brittleness, hardness and softness of the silicone sealing strip are not selected scientifically, and the fixing method of the sealant strip is different, which often causes steam leakage. It is also easy to handle. Check its sealing performance frequently. If you find that the sealant strip is brittle, you must remove and replace it as soon as possible.

3、 Because the constant temperature and humidity test chamber generally has a large volume, the tailgate specification expands accordingly, resulting in a large net weight. After a long-term load, the door hinge in the vertical direction will shift, causing the tailgate to shift and not close tightly. This kind of problem is usually handled according to the total number of modified high load door hinges and lift door hinges.

It can be seen from the left and right analysis that the appearance of the airtightness problem of the constant temperature and humidity test chamber is both a design problem and a maintenance problem. When using the equipment, we should strictly follow the machine and equipment maintenance manual to carry out routine maintenance, so as to ensure the normal operation of the machine and equipment and no deviation of performance parameters.