What is the reason for the problem of uneven uniformity in the use of high and low temperature test chambers? Below is a detailed explanation of the reasons why the uniformity of the high and low temperature test chamber does not meet the standard.

Thermal radiation: Design issues make it difficult to achieve a uniform symmetrical structure in the internal structure and space design, and asymmetric structures will inevitably lead to deviations in internal temperature uniformity. This is mainly reflected in sheet metal design and processing, such as the design of air ducts, the placement of heating pipes, and the size of fan power.

Sealing: The sealing between the box and the door is not tight, such as non customized sealing strips with seams, air leakage from the door, etc., which affects the temperature uniformity of the workspace.

The rationality of selecting and placing the tested samples in the high and low temperature test chamber: If the volume of the test object is too large, or if the position or method of placing the test object in the working chamber of the high and low temperature test chamber is inappropriate, it will obstruct the air convection inside and also produce significant temperature uniformity deviation. Placing the test product next to the air duct seriously affects the circulation of air, and of course, the uniformity of temperature will be greatly affected. =

Due to different inner wall structures, the temperature of the inner wall will also be uneven, which will affect the thermal convection inside the working chamber and cause deviations in the internal temperature uniformity.

Thermal load: If enough test samples are placed in the high and low temperature test chamber to affect the overall internal heat convection, it will inevitably affect the uniformity of the internal temperature to a certain extent. For example, placing LED lighting products, which emit light and heat, will become a thermal load, which will have a significant impact on the temperature uniformity.

Heat transfer: Due to the different heat transfer coefficients on the front, back, left, right, top, and bottom surfaces of the box wall, some have threading holes, detection holes, testing holes, etc., which cause local heat dissipation and transfer, resulting in uneven temperature distribution of the box body and uneven radiative convective heat transfer on the box wall, affecting temperature uniformity.