基于热阻膜技术的恒温机箱研制

Study on Thermostatic Chassis Based on Film Resistance Heater

文中针对设备机箱使用环境特点,结合设备使用需求,进行了基于热阻膜技术的恒温机箱结构与温控系统的研制工作。通过设备布局分析与设计确定了机箱的结构模型,采用Mentor Graphics对机箱内温度场进行热仿真分析,确定采用热管底板实现机箱内温度场均匀化。重点在于使用PID(比例积分微分)控制算法控制热阻膜的加热,通过合理布局热阻膜及热敏电阻作用区域,实现机箱内部环境温度±0.1℃的控制精度。经过工程验证,该恒温机箱满足设备使用需求,温控系统可靠稳定,为将来的项目应用奠定了基础。

In this paper,the research and development of the thermostatic chassis structure and the temperature control system based on film resistance heater technology are carried out according to the characteristics of the operation environment of the equipment chassis and the use requirements of the equipment.The structural model of the chassis is determined by the equipment layout analysis and design.The thermal simulation analysis of the temperature field in the chassis is conducted using Mentor Graphics,and the use of heat pipe floor to realize the homogenization of the temperature field in the chassis is determined.The emphasis is on the controlling of the heating of the film resistance heater using the PID control algorithm,and the rationally arranging the functioning area of the film resistance heater and the thermistor to realize the control accuracy of±0.1℃of the ambient temperature inside the chassis.After the engineering verification,the thermostatic chassis meets the use requirements of the equipment,the temperature control system is stable and reliable,thus laying the foundation for future project application.