What does "three boxes" in the three-box high and low temperature impact test chamber mean?

The three boxes refer to three areas inside the high and low temperature impact test chamber: high and low area, low temperature area, test area, high temperature area is responsible for heat storage, low temperature area negative cold storage, and test area is put test subjects for testing
.

Three-box type high and low temperature impact test chamber to adopt * heat insulation structure and heat storage and cold storage effect, the test to be measured is completely stationary, the application of cold and hot air circuit switching mode, impact test automatically open the high temperature area and low temperature area of the air valve to achieve high temperature and low temperature impact test
.

It can simulate the temperature abrupt change environment such as high temperature -low temperature, low temperature -high temperature, low temperature - normal temperature - high temperature, high temperature - normal temperature - low temperature that the test subject may encounter, and conduct temperature shock test on the test subject to verify the characteristics of the test subject-related materials and the stability and applicability of the product, so as to provide a basis
for improving the reliability of the product and the quality control of the product.

The use of the three-box high and low temperature impact test chamber: it can be used to test the degree to which the material structure or composite material can withstand in a continuous environment of temperature and extremely low temperature in an instant, so as to test the chemical changes or physical damage caused by thermal expansion and contraction in a short period of time.
Applicable objects include metals, complete machines (or components), electrical appliances, instruments, materials, coatings, plating, etc.
for corresponding climatic environment acceleration tests, in order to evaluate
the test behavior of the sample or the test.