The standard test design of the high and low temperature test chamber refers to the different design of the structure requirements according to the different test requirements. We usually use 4 standard models: the design of the test chamber with forced air circulation and the simulation of free air The design of the conditional effect test box, the thermal characteristics of the mounting frame, and the emissivity of the box wall, the following, Shanghai Linpin Instrument Co., Ltd. tells you in detail:
1. Design of the test box with forced air circulation: For the test samples that cannot be tested in the free air condition test box due to the large size or high heat dissipation, the test box with air flow (with forced air circulation) should be used, except for related tests Other than the size of the box, all other requirements for the free air test box, the design of the forced air circulation test box are applicable, and the airflow speed should meet the requirements: it should not be too small to ensure that the test sample does not overheat during the test. It should be too large, so that the test sample is too cold during the test, the airflow should be as uniform as possible, and the airflow direction should be vertically upward.
2. The design of a test chamber that simulates the effect of free air conditions: because the temperature control in the chamber is achieved by the temperature changes of these components, the temperature of the wall of the box should also avoid large fluctuations to minimize the problem of radiation effects. In order to get the best results, all the walls of the test box should be heated or cooled. It is a suitable method to avoid the large fluctuation of the wall temperature by heating or cooling all the walls with the liquid.
3. Thermal characteristics of the mounting bracket: The requirements for the thermal characteristics of the mounting bracket can be referred to the corresponding standards, and the thermal conductivity of various materials can refer to the corresponding standards. If the thermal conductivity of the mounting bracket or the connecting wire (such as lead) is significant to the test results influences.
4. Radiation coefficient of the box wall: To simulate the free air condition in infinite space, the box wall should be hot black.
Standard test design of high and low temperature test chamber
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