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在微型热电制冷器应用中,精密恒温器、医疗仪器、电子控制元件等的快速制冷以及在环境条件变化情况下的适应性调节,都体现了非稳态研究的重要价值。介绍了一种利用等效电路网络思想来研究微型热电制冷器非稳态特性的方法。首先基于热电模拟思想,建立了微型热电制冷器的等效电路模型,该模型综合考虑了结构尺寸、非控制端温度、控制端热流量、附加热阻、附加电阻、工作电流以及驱动源等因素对器件特性的影响。然后利用该模型分别分析了制冷与热泵模式下,控制端热量、非控制端温度、工作电流等运行条件随时间改变时,对微型热电制冷器非稳态工作特性的影响。并最终得出了控制端的负载、非控制端温度、工作电流等参数对控制端温度Tcs影响的基本规律,这为微型热电制冷技术的深入研究和应用提供了理论指导。
In microthermal thermoelectric cooler applications, the rapid cooling of precision thermostats, medical instruments, electronically controlled components, etc., as well as the adaptive regulation of environmental conditions, all reflect the value of unsteady research. A method to study the unsteady characteristics of a miniature thermoelectric cooler using the equivalent circuit network concept is introduced. Based on the idea of thermoelectric simulation, an equivalent circuit model of a micro-thermoelectric cooler is established. The model considers factors such as structure size, temperature at the non-control end, heat flux at the control end, additional thermal resistance, additional resistance, operating current and driving source Effect on device characteristics. Then, the model was used to analyze the influence of operating conditions such as control end temperature, non-control end temperature and operating current on the steady-state operation characteristics of micro-thermoelectric cooler in cooling and heat pump mode. Finally, the basic law of the influence of control end load, non-control end temperature, working current and other parameters on the control end temperature Tcs is obtained, which provides theoretical guidance for the further research and application of micro-thermoelectric cooling technology.