[Differences in the structure of the test chamber]
1. Taking the three box type as an example, the thermal shock test chamber is composed of a high temperature chamber, a low temperature chamber and a test chamber. There are a total of three boxes.
2. The rapid temperature cycling test chamber only has a testing box, with a total of one box.
[Differences in relevant standards]
1. The thermal shock test chamber meets the requirements of GB/T2423.1-2008 Test A, GB/T2423.2-2008 Test B, GB-T10592-2008, GJB150.3-198, GJB360A-96 method 107 temperature shock test.
2. The rapid temperature cycling test chamber meets the requirements of GB/T2423.12-2001 GJB150.5 GB10592-89 test.
[Differences in refrigeration media]
1. The environmental friendly R404 and R23 refrigerants are used as the cooling medium in the thermal shock test chamber.
2. The rapid temperature cycling test chamber takes models above 10 degrees Celsius per minute as an example, and the cooling medium is liquid nitrogen.
[Differences in temperature changes]
1. The temperature change of the thermal shock test chamber is to complete the transition from temperature to mild temperature to warm shock within five minutes. It is an instantaneous temperature conversion machine with a very fast conversion rate, so it is usually called a temperature impact testing machine. Moreover, temperature shock is achieved in a non-linear manner. The principle of temperature shock is that when high-temperature testing is required, the temperature of the high-temperature storage box is automatically transported to the testing box through control to achieve the effect of high-temperature shock, and low-temperature shock is equivalent. The main purpose of the experiment is temperature shock.
2. The temperature change of the rapid temperature cycling test chamber is achieved by cooling and heating within the specified time, which is non-linear and linear. For example, a device with a temperature range of -40 ° C to 80 ° C can achieve a temperature drop of 5 ° C per minute from 80 ° C to -40 ° C in a linear cooling system, which takes 24 minutes to reach -40 ° C. Of course, a device with a temperature range of 10 ° C, 20 ° C, or 30 ° C per minute can also complete heating and cooling in a very short time. The purpose of the experiment is to quickly raise and lower the temperature, so it is also known as a fast raise and lower temperature testing machine.