In my understanding, the Liquid Nitrogen Cryogenic Test Chamber uses liquid nitrogen, which is compressed from gaseous nitrogen, to achieve refrigeration. Don't you think it is similar to a low-temperature Chamber ? In fact, I am not very clear about this issue either. Next, please allow our company's professional technicians to explain.
Although the liquid nitrogen cryogenic low-temperature box is called a low-temperature Chamber , there are still certain differences between it and a true low-temperature Chamber . The main difference lies in the presence or absence of a compressor. This test Chamber uses liquid nitrogen at -196°C as the refrigerant for cooling. Depending on different methods, it can be divided into liquid and gas methods. The device I am talking about uses the liquid method for testing. In this case, the test temperature needs to reach -150°C. This method is widely used, but it has a disadvantage, that is, the test process has thermal shock, which can easily cause some materials to undergo brittle fracture at low temperatures. The refrigeration of a low-temperature Chamber is made of imported compressors from abroad to form a cascade system. The refrigeration effect is also excellent. The refrigeration method of this test Chamber uses the reverse Carnot cycle. Both of these test boxes and test methods require a series of cyclic actions to achieve the desired effect.
In fact, no matter which test Chamber or test method is used, their scope of application is the same, and their function is also to achieve a "cooling" effect. They are generally used in industries such as electronics, electrical, aerospace, and machinery, and they play an undeniable role in these fields.
