Four major differences between the two-box thermal shock test chamber and the three-box thermal shock test chamber:

1. Curves of two temperature shock test chambers:

Two boxes of cold and hot shock test chamber: There is no room temperature stay stage, only high temperature and low temperature stay, there is obvious overshoot phenomenon in the early stage of high and low temperature stay.

Three-box cold and hot shock test chamber: There is a normal temperature stay stage. Due to different control principles, the high and low temperature and normal temperature stay stages are similar to the sine function curve.

2. The functions of two temperature shock test chambers:

Two boxes of thermal shock test box: two boxes, a high temperature box and a low temperature box, with a hanging basket in the middle. During the test, the sample is placed in the hanging basket. When the high temperature test is performed, the hanging basket is raised to the high temperature box, and vice versa, the low temperature test is performed. The temperature is fast; the structure is compact, and the volume is generally small; the conversion time is short, and the product needs to be moved during the test; it can be used as a thermal shock box and can be used as a separate high temperature box or a separate low temperature box.

Three boxes of thermal shock test box: three boxes, the high temperature box, the box where the samples are placed, and the low temperature box. When testing high temperature, the high temperature box door is opened and the low temperature box door is closed. When testing low temperature, the high temperature box door is closed and the low temperature box door is opened; it is in room temperature, which is convenient for taking and placing samples; the product does not move, and the impact of product movement on the product can be reduced, and some sensitive electrical signal monitoring lines can be connected; the conversion time is relatively long.

3. Features of the two temperature shock test chambers:
Compared with the three-box type, it can test the adaptability of the product to withstand sudden changes in ambient temperature.

4. The structure of two kinds of temperature shock test chamber test:
The overall structure of the two-box temperature shock test box: the test box is composed of a preheating room, a precooling room, a refrigeration system, a heating system, an air duct system, and an electrical control system. The pre-cooling chamber is located at the upper back of the test box, the preheating chamber is located at the front and lower part of the test box, the refrigerator is located at the rear and lower part of the test box, and the electrical control cabinet is located on the right side of the test box.

The overall structure of the three-box temperature shock test box: the sample item is completely stationary. The test box consists of a preheating room, a precooling room, a working room, a refrigeration system, a heating system, an air duct system, and an electrical control system. The studio is located in the middle of the test box, the high temperature room is located in the lower part of the test box, the low temperature room is located in the upper part of the test box, the refrigerator system is located in the rear lower part of the test box, and the electrical control cabinet is located in the upper part of the right side of the test box.

The Haida cold and thermal shock test chamber adopts imported compressors and Schneider Electric accessories, plus advanced argon arc welding process to ensure stable performance, energy saving and high efficiency.