Whether it is daily life or work, the electrical appliances used or used, as long as they are involved in temperature control, need to be insulated. Then, the choice of the thickness and material of the insulation material of the constant temperature and humidity test chamber is very important. Next, Beijing Yashilin Technical Department will discuss the choice of insulation material.
The choice of heat preservation method is different from the sensing method and the corresponding method and material are adopted. For example, in order to prevent the heat transfer of hot air in minutes, a vacuum insulation layer is used. However, due to technical and cost reasons, the current environmental testing equipment uses thermal insulation materials such as ultra-fine glass fiber cotton (abbreviated asbestos), rigid polyurethane foam, expanded styrene, etc. Now we will analyze and analyze these materials Difference.
Asbestos, because of its good thermal insulation performance and low cost, was first used in large-scale thermal insulation materials. It also has the characteristics of easy operation and filling, so it is widely used in the field of heat conduction and thermal insulation. However, its biggest problem is that glass fiber is easily inhaled into human lungs, and easily penetrates clothing to contact the skin, and then penetrates the skin to enter the human body. The upper glass fiber that enters the lungs and the human body cannot be digested and discharged, and glass fiber is a carcinogen. Therefore, in recent years, many industries have banned the use of asbestos as a thermal insulation material.
Rigid polyurethane foam is also widely used, but because the temperature range of polyurethane rigid foam insulation can not be higher than 100 ℃, it limits its range of use.
Note: The temperature range of the Yashilin brand constant temperature and humidity test chamber: 0 ℃ ～ 150 ℃
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