The high and low temperature airflow temperature impact system is a kind of high and low temperature airflow cycle impact equipment used for the cold and hot test of electronic components/modules. It can be seen from the name that this equipment is a system that provides temperature airflow and temperature control function. A complete system includes control system, refrigeration system, temperature setting system and air circulation system.

1. Control system

The control system is the core of the high and low temperature airflow temperature impact system. The control system determines the temperature rise rate, accuracy, whether there is program control and other important indicators of the cold and hot impact machine. Most of the current temperature control modes are AIR temperature control mode; DUT temperature control mode; AIR and DUT temperature simultaneous feedback mode. Manual mode or program mode can be selected for operation.

2. Refrigeration system

The high and low temperature airflow temperature impact system is a pure mechanical refrigeration system equipment, which aims to provide a closed, heat isolated environment with high capacity, high flow rate and temperature controlled airflow. The dry and clean gas used by the cold and hot shock machine has no pollution, stable gas flow, no vibration and no consumption. The equipment adopts unique single compressor technology, which is a system that can release - 80 ° C temperature under the flow rate of 18SCFM (8.5 l/s), and the temperature rise and fall rate is very fast.

3. Temperature setting system

To reach a predetermined temperature, use the temperature setting. It mainly depends on the temperature sensor, through which the sensor senses the temperature and transmits the real-time signal to the control system, so as to achieve the predetermined temperature. You can also set the running time of the set value (temperature) and set the deviation of the set value (temperature) to control the temperature accuracy by entering the set value in the operation interface. Finally, activate and execute the set value.

4. Air circulation system

The insulating glass cover (or other thermal insulation cover) of the high and low temperature airflow temperature impact system prevents ambient air from entering, creating a closed, repeatable heat transfer environment. The glass cover is usually placed on the test fixture, and the air impact is centered on the sample to be tested. Silicone sponge insulating pad is often used to isolate the tested product from the support surface.