The high and low temperature test chamber is a product that is placed at a specified temperature and humidity to study the product's high temperature resistance, low temperature resistance and humidity resistance, as well as heating, cooling, humidifying and dehumidifying capabilities. Therefore, the test box has a wide temperature control range. This paper aims to explain how it achieves temperature control by studying the temperature control of the high and low temperature test chamber and ensuring the temperature control to obtain the experimental results:
First, the temperature control of high and low temperature test chamber
1. Temperature sensor: PT100 platinum resistance sensor with high precision;
2. The temperature control output power is calculated by the microcomputer to achieve high precision and high efficiency power consumption;
3. The temperature control adopts the same channel coordination control of PID+SSR system. Heat balance temperature adjustment method;
4. The return air outlet has an automatic defrost device.
Second, the material of high and low temperature test chamber
1. Box body gallbladder: using advanced (SUS304) stainless steel plate;
2, the box shell: the use of high-quality A3 steel CNC machine tool processing, the outer surface of the shell for plastic treatment, more clean and beautiful.
3. The insulation material is made of high-density glass fiber cotton + polyurethane rigid foam, and the thickness of the insulation cotton is 100mm/120mm.
4, observation window: the use of multi-layer hollow tempered glass, built-in lighting, the inner glued sheet type conductive film heating defrosting clearly observe the test process;
5, temperature circulation system: the use of temperature-resistant low-noise air conditioning type motor, multi-leaf centrifugal wind wheel;
6. Between the door and the box: Double-layer high temperature resistant and high-strength sealing strip is used to ensure the sealing of the test area.
Through the above two aspects of the temperature control of the high and low temperature test chamber and the material quality to ensure temperature control, I believe that everyone has a more in-depth understanding of the test temperature control, which will bring you a good understanding of the future operation and maintenance. Great help.
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