FAQ

          Water cooling and heat dissipation: refers to the use of water or other refrigeration liquids according to the fluidity method to carry out temperature reduction, the use of more large high and low temperature test chambers, walk-in high and low temperature laboratories, etc., generally also used in semi-closed compressor units.
             The refrigeration efficiency of water cooling is generally much higher than that of air cooling, and its advantage is that the cooling effect is good and the environmental requirements are relatively low, especially in summer. The disadvantage is that it needs a supporting cooling water device, that is, it needs to be constructed with water towers and pipelines.
             Air cooling and heat dissipation: It refers to the use of air fluidity to cause convective heat transfer, and then reduce the temperature in the box to achieve the purpose of refrigeration. This is usually done by increasing the surface area of the object that needs to be cooled, or by increasing the rate at which air flows through the object per unit of time, or by a combination of both.
            The former can be achieved by adding a heat sink to the surface of the object, usually hanging the heat sink outside the object, or fixing it on the object to make the heat dissipation more efficient. The latter can be used with fans (fans) to enhance ventilation and enhance the cooling effect. In most cases, the addition of a heat sink can greatly improve the cooling efficiency.

          Special attention needs to be paid to the size of the entrance door of the laboratory to avoid the chamber size being too large to enter;
It is necessary to confirm the power distribution specifications of the laboratory, whether it is 380V, 50HZ; and whether cooling water and humidity water are required.

    Most of our company's employees are old employees who have worked in this industry for 10 years, and they carry out production and processing in accordance with the operating standards.

1 Curves of two types of temperature shock test chambers: 

1.1. Two boxes of cold and thermal shock test chambers: there is no room temperature retention stage, only high temperature and low temperature stay, and there is obvious overshoot phenomenon in the early stage of high and low temperature residence stage.

1.2. Three-box cold and thermal shock test chamber: there is a room temperature residence stage, due to different control principles, the high and low temperature and room temperature residence stage are similar to the curve of the sinusoidal function.

2. Functions of two types of temperature shock test chambers:

2.1. Two boxes of cold and thermal shock test chambers: two boxes, high temperature box and low temperature box, and the middle is a hanging basket. During the test, the sample is placed in the hanging basket, and the hanging basket is mentioned in the high temperature box during the high temperature test, and the low temperature test is done on the contrary. The temperature rate is fast; Compact structure, generally small volume; The changeover 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.

2.2. Three boxes of cold and thermal shock test chambers: three chambers, high temperature chambers, boxes for placing samples and low temperature chambers, when testing high temperatures, the high temperature chamber door is opened, and the low temperature chamber door is closed. When testing low temperature, the high temperature chamber door is closed and the cryogenic chamber door is opened; Room temperature for easy sample access; The product does not move, reducing the impact of product movement on the product, and can be connected to some sensitive electrical signal monitoring lines; The conversion time is relatively long.

3. Characteristics of two types of temperature shock test chambers:
The two-box high-low temperature conversion time is faster, which can test the adaptability of the product to withstand the instantaneous change of ambient temperature compared with the three-box type.

4. The structure of two kinds of temperature shock test chamber test:

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

4.2. The overall structure of the three-box temperature shock test chamber: the sample items are completely stationary. The test chamber is composed of a preheating chamber, a pre-cooling chamber, a studio, 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 chamber, the high temperature chamber is located in the lower part of the test chamber, the low temperature chamber is located in the upper part of the test chamber, the refrigerator system is located in the rear lower part of the test chamber, and the electrical control cabinet is located in the upper part of the right side of the test chamber.