The three box cold thermal shock chamber is composed of a preheating chamber, a precooling chamber and a test chamber. The preheating box and precooling box are generally hidden behind and below the test box.

The preheating box and precooling box are mainly used to store hot and cold air. When the temperature of the preheating box and precooling box reaches my desired preheating temperature and precooling temperature, the equipment opens the door of the preheating box or precooling box through the cylinder and blows the hot or cold air into the test box to reach the impact temperature.

When we fill the preheating box or precooling box into the test box, because the test box is either at high temperature or low temperature, and the energy consumed at this time will be relatively large, the temperature conversion time of the three box cold and heat shock will be relatively long, which is generally completed within 3 to 5 minutes. Therefore, pay attention to the selection of test requirements.