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为实现在复杂外热流条件下对CO_2探测仪红外探测器组件温度的有效控制,对其进行了详细的热设计。对红外探测器周围外热流进行分析,确定了其散热面位置。基于红外探测器所处空间热环境以及自身高功耗、低热控指标的特点,提出热设计方案。对红外探测器组件有限元模型进行了热分析计算,得到各个转角姿态下的红外探测器组件的温度范围为-31.8~-26.9℃,计算结果满足设计要求。通过CO_2探测仪热平衡试验对热设计进行了验证,试验中红外探测器组件的温度范围为-32.6~-30.1℃,试验结果与计算结果基本一致,满足热控指标要求,说明热设计方案在复杂外热流条件下合理可行,具有较好的适应性。
In order to realize the effective control of the temperature of CO_2 detector infrared detectors under complicated external heat flow conditions, a detailed thermal design was carried out. Analysis of the heat flux around the infrared detector to determine the location of the cooling surface. Based on the thermal environment in which the infrared detector is located and its own characteristics of high power consumption and low thermal control index, a thermal design scheme is proposed. The thermal analysis and calculation of the infrared detector component finite element model are carried out. The temperature range of the infrared detector components under various corner attitude is -31.8 ~ -26.9 ℃. The calculated results meet the design requirements. The thermal design was verified by thermal equilibrium test of CO_2 detector. The temperature range of the infrared detector was -32.6 ~ -30.1 ℃. The experimental results were in good agreement with the calculated results, which satisfied the requirements of thermal control index. External heat flow is reasonable and feasible, with good adaptability.