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随着高性能制冷CCD成像系统已经成为航天成像式探测的一个重要发展方向,热电制冷作为一种有效的电子设备冷却方法广泛用于重要部件的主动热控。为了实现热电制冷器工作电流的合理选择,在分析热电制冷机理的基础上,首先介绍了热电模块的3种工作模式(制冷、加热和热电发电),同时研究了热电偶内温度分布的一般形式,最后,在第一类边界条件下,针对工作电流对热电制冷器性能的影响进行了详细分析,并指出了在制冷模式下工作电流的选择范围,发现过小或过大的电流都将降低制冷器的制冷效果,为今后热电制冷器工作电流的选择提供了参考依据。
As high performance cooled CCD imaging systems have become an important development direction for space imaging detection, thermoelectric cooling is widely used as an active thermal control of critical components as an effective cooling method for electronic devices. In order to achieve a reasonable choice of the operating current of the thermoelectric cooler, based on the analysis of the thermoelectric cooling mechanism, three working modes (cooling, heating and thermoelectric power generation) of the thermoelectric module are firstly introduced. At the same time, the general form of the temperature distribution in the thermocouple Finally, under the first kind of boundary conditions, the influence of operating current on the performance of the thermoelectric cooler is analyzed in detail, and the choice of working current in cooling mode is pointed out. It is found that the current of too small or too large current will decrease The cooling effect of the refrigerator provides the reference for the selection of the operating current of the thermoelectric cooler in the future.