Dongguan Kewen Experimental Equipment Co., Ltd. communicated with new customers purchasing high-low temperature impact test chambers and rapid temperature change test chambers and found that the difference between the equipment is rather vague. To facilitate the customer's procurement, the following is a brief introduction of the differences between the two types of equipment. :

Hot and cold impact testing machine This product is suitable for the safety performance test of electronic vitality parts to provide reliability test, product screening test, etc. At the same time, through this equipment test, it can improve product reliability and product quality control. The high-low temperature impact test box is an essential test equipment for aviation, automotive, home appliances, scientific research and other fields. It evaluates and determines the parameters and performance of electric and electronic products, automotive electrical appliances, and materials, and performs temperature and environmental impact changes in high and low temperature tests. Adaptability of use, applicable to schools, factories, military, research positions, and other units.
The rapid temperature change test is used to determine the suitability of the product for storage, transportation, and use in a rapidly or slowly changing climate at high and low temperatures. The test process is based on the normal temperature → low temperature → low temperature stay → high temperature → high temperature stay → normal temperature as a cycle, the severity of the temperature cycle test is determined by the high / low temperature range, residence time and the number of cycles.

First, the difference in temperature changes 1, high and low temperature impact test chamber temperature change is completed within five minutes warm to mild warm to warm shock conversion. The conversion temperature is instantaneous, the conversion rate is very fast, so it is usually called temperature impact testing machine. And temperature shocks are done in a non-linear way. The principle of temperature shock is that the temperature of the high-temperature storage box is required to be automatically delivered to the test box to achieve the effect of high-temperature impact when the high-temperature test is performed, and the low-temperature impact is equivalent. The main test purpose is temperature shock.
2, the temperature change is completed within a specified time to reduce temperature and temperature, sub-linear and linear. For example, a device with a temperature range of -40° to 80°C can reduce the temperature from 80°C to -40°C at a temperature of 5°C per minute in a linear cooling mode. It takes 24 minutes to reach -40°C in 24 minutes, which is much faster than Wuhan's hot and cold. The impact tester's time is slower than the normal high-low temperature tester, because the standard Wuhan high-low temperature tester is non-linear 1 degree per minute. Of course, this device at 10 degrees, 20 degrees, and 30 degrees per minute can also be heated and cooled in a very short period of time. The purpose of the test is to quickly raise and lower the temperature, so there is also a rapid rise and fall temperature tester.
Second, the difference between the box structure 1, high and low temperature impact test chamber is composed of high temperature box, low temperature box, test box. A total of three boxes. (Take three boxes as an example)
2, rapid temperature change test box only test box, a total of one box.
Third, the difference between the relevant standards 1, high and low temperature impact test chamber in line with GB/T2423.1-2008 test A, GB/T2423.2-2008 test B, GB-T10592-2008, GJB150.3-198, GJB360A-96 Method 107 Temperature Impact Test Requirements.
2. The rapid temperature change test box meets the requirements of GB/T2423.1.2-2001 GJB150.5 GB10592-89 test.

Fourth, the difference between refrigerants 1, high and low temperature impact test chamber is the use of environmental protection R404 and R23 refrigerant when the refrigerant medium.
2, rapid temperature change test chamber for more than 10 degrees per minute model for example, the cooling medium is liquid nitrogen (of course, the following 10 degrees are also useful refrigerant, but not common)

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