How is the temperature of the cold and hot shock test chamber precisely controlled

The precise temperature control of the cold and hot shock test chamber relies on integrated hardware systems and intelligent algorithms, which achieve rapid and stable temperature changes through multi technology collaboration. ‌

The core of temperature control lies in high-precision sensors and intelligent algorithms. The system adopts a distributed multi-level temperature sensor network to monitor the temperature distribution inside the box in real time, with an accuracy of up to 0.1 ℃, and feeds back the data to the controller; The controller uses PID self-tuning or fuzzy logic algorithms to dynamically adjust the output power of the heater and refrigeration system. For example, microcomputer PID control combined with SSR can achieve anti integral saturation regulation, reduce overshoot, and improve stability. ‌

Rapid temperature conversion is achieved through heat exchange and airflow design. The thermodynamic cycle system (such as water-cooled units) works in conjunction with pneumatic damper switching technology. The refrigerant quickly absorbs heat in the evaporator or releases heat in the condenser, and with the help of a forced axial flow fan to promote air circulation, the temperature recovery time is shortened to within 5 minutes, and the cooling rate can reach 70 ℃/minute. ‌

Temperature uniformity and stability are ensured by optimized insulation and air circulation. The box is made of high-performance insulation materials to reduce environmental interference, and the air duct design ensures a uniform temperature field with fluctuations controlled within ± 0.5 ℃; At the same time, the dynamic load compensation function automatically adapts to the difference in sample heat capacity and maintains the set temperature. ‌

System maintenance and operational standards are crucial for long-term accuracy. Regularly calibrate sensors, clean water cooling system heat exchangers, and reduce human errors through standardized procedures, such as PLC automatically adjusting compressor operating conditions according to preset programs to ensure long-term reliability. ‌