Factors Affecting the Uniformity of High and Low Temperature Test Chambers

The high and low temperature test chamber is a reliability test device for testing industrial products in a high and low temperature alternating environment. Under the condition of high and low temperature (alternating), the performance of parts and materials of related products such as electronic and electrical research institutions is tested.

Ⅰ. Selection of the high and low temperature test chamber

Should focus on the technical parameters, including temperature range, uniformity, fluctuation, heating speed, cooling speed and other factors, is to determine whether the high and low temperature test chamber can achieve the experimental purpose of the required conditions.

In these four elements play a major role in the uniformity, because in our experimental process often encounter the problem of excessive uniformity, so we should pay special attention to this parameter.

Ⅱ. What are the reasons for the non-uniformity difference between the high and low temperature test chambers?

1. The box in the high and low temperature test chamber is poorly sealed, such as air leakage, which affects the temperature uniformity of the equipment studio.

2. If the temperature deviation is detected in the high and low temperature test chamber, the sample must be placed in the studio and the test sample should be placed as required. If the volume of the test sample is too large, or the placement method or location is not timely, the air convection will be blocked, which may also lead to large temperature deviation.

3. The wall of the high and low temperature test chamber generates heat conduction due to the high temperature test, and then the high and low temperature test chamber leaks heat or cold. In order to make up for this loss, there must be a temperature difference in the air supply. The air temperature in the high and low temperature test box is higher. When the air supply temperature is lower than the working temperature of the box, the temperature in the high and low temperature test box will drop, because a certain air supply temperature difference makes the temperature in the working room uneven.

4. The structure of the high and low temperature test chamber will greatly affect the uniformity of the intermediate temperature. Because its structure is difficult to be completely symmetrical, it is not conducive to temperature uniformity.

In order to easily obtain uniform temperature, it is necessary to change the structure of the high and low temperature test box to the front door, the air conditioning room at the back, and the box body to supply air and return air.

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