temperature shock test chamber is mainly divided into two structural types: three-box type and two-box type. There are obvious differences between the two types in structural design, applicable scenarios and operation methods.

three-box temperature shock test chamber is composed of three independent boxes: high temperature zone, low temperature zone and test zone. During the test, the sample to be tested is always placed in the test area, and the hot and cold air is quickly introduced into the test area through the air diversion system between the high temperature area and the low temperature area, so as to realize the rapid temperature conversion. The characteristic of this method is that the sample does not need to move, avoids the position deviation or vibration caused by handling, and is suitable for the experimental environment with high requirements on test accuracy and equipment use frequency. At the same time, because the temperature switching is completed by air introduction, the switching speed is faster and the temperature fluctuation is relatively small, which helps to improve the repeatability of the test results.

The two-box temperature shock test box has only two boxes in the high temperature zone and the low temperature zone, and the test sample needs to be physically moved between the two boxes. The temperature shock is generally achieved by moving the sample from one temperature zone to another temperature zone through a lifting mechanism or slide rail. This design is more compact in structure, occupies a relatively small space, and is suitable for places with certain restrictions on the installation area. In addition, the two-box type is relatively low in terms of manufacturing cost and operation difficulty, and is suitable for applications where the test frequency is not high or the test efficiency is not so strict.

, from the point of view of temperature switching efficiency, the three-box type is more rapid in the conversion process due to the introduction of static sample gas flow, and is suitable for frequent impact testing. The two-box type is relatively slow in the switching process due to the physical displacement of the sample, and requires high maintenance of the transmission system during long-term use.

In the actual selection process, it is necessary to determine which structure is more appropriate according to the specific requirements of the product volume, test frequency, site space, budget cost and test conditions. The three-box type is suitable for batch testing, high-precision evaluation or large-scale product verification, and the two-box type is suitable for low-and medium-frequency testing or functional verification in the development stage. There are also some differences in the use logic and maintenance methods between the two. It is recommended to select and configure the specific working conditions after clarifying the test requirements.