Thermal shock test chamber is used to test structural materials or composite materials, through the extreme high temperature and low temperature continuous environment can tolerate the degree, in a short time to test materials, products due to thermal expansion and contraction caused by chemical changes or physical damage. Thermal shock test chamber is widely used in metal, plastic, rubber, cable and wire industry quality testing test, can be used as a basis or reference for product improvement. There are two groove and three groove cold and heat shock testing machines respectively.

Two-box cold and thermal shock test chamber Overview:

Two-box temperature impact test box, as the name suggests, there are only two studios, one is a high temperature area and one is a low temperature area, impact work, only need to move the test piece to the relative studio through the hanging bar, energy loss is relatively small, compared with the three-slot, small configuration, low cost, the failure rate is correspondingly low.

Three-box cold and thermal shock test chamber Overview:

The three-box temperature impact test chamber has three studios, mainly used for the test object can not move, or loaded test (energized or external measurement sensor, etc.), the test sample is placed in the work area, by changing the air duct, the temperature of the pre-cooling chamber or preheating chamber into the studio, to achieve rapid impact changes in temperature; Due to the addition of one more studio area than the two-box impact test chamber, the requirement for pre-cooling heat is higher when lifting and cooling, and the allocation value of power and energy storage device is also large, and the cost is correspondingly increased.

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

Curve of one or two temperature impact test chambers:

1.) Two boxes of cold and heat shock test box, there is no normal temperature stay stage, only high temperature and low temperature stay stage, there is an obvious overshoot phenomenon in the early stage.

2) Three boxes of cold and heat shock test box, there is a normal temperature stay stage, due to different control principles, high and low temperature and normal temperature stay stage similar to sine function curve.

Two, two kinds of temperature impact test chamber function

1) Two boxes of hot and cold impact test box: two boxes, high temperature box and low temperature box, in the middle is a hanging basket. During the test, the sample is placed in the hanging basket. During the high temperature test, the hanging basket is mentioned in the high temperature box, and the low temperature test is done. The temperature is fast; Compact structure, generally small volume; The conversion time is short, and the product needs to be moved during the test; It can be used as a thermal shock box or as a separate high temperature box or a separate low temperature box.

2) Three boxes of cold and heat impact test box: three boxes, high temperature box, sample box and 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; At room temperature, easy to take samples; The product does not move, reduce the impact of product movement on the product, you can connect some sensitive electrical signal monitoring lines; The conversion time is relatively long.

Three, the characteristics of two kinds of temperature impact test chamber:

The two-box high-low temperature conversion time is faster, and the adaptability of the product to withstand instantaneous changes in ambient temperature is more tested than the three-box type.

Four, two kinds of temperature impact test box test structure:

1). Overall structure of two-box temperature impact test chamber:

The test chamber is composed of preheating chamber, precooling chamber, refrigeration system, heating system, air duct system and electrical control system. The pre-cooling chamber is located in the upper part of the test box, the preheating chamber is located in the lower part of the test box, the refrigerator is located in the lower part of the test box, and the electrical control cabinet is located on the right side of the test box.

2). The overall structure of three-box temperature impact test chamber:

The sample item is completely stationary. The test chamber is composed of preheating chamber, precooling chamber, working room, refrigeration system, heating system, air duct system and electrical control system. The studio is located in the middle of the test box, the high greenhouse is located in the lower part of the test box, the low greenhouse is located in the upper part of the test box, the refrigerator system is located in the lower part of the test box, and the electrical control cabinet is located on the right side of the test box.