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根据某车载冷暖箱的结构,建立了计算流体力学(CFD)模型,通过自定义函数,实现了箱体内外温度场分析。首先研究了制冷片电流规格、环境温度、热端风扇转速对降温过程中制冷片冷、热端温度、箱体中心点温度等特性的影响,结果表明,环境温度对冷暖箱性能影响显著。随后完成了车载冷暖箱样件设计并验证,试验结果与计算结果相符,验证了计算模型的可靠性。最后,结合实车使用工况,在热端风扇进风处增加导流板,提升了冷暖箱性能系数。研究结果对指导车载冷暖箱选型、减少试验次数、缩短开发周期、降低开发成本具有一定的指导意义。
According to the structure of an automobile heating and cooling box, a computational fluid dynamics (CFD) model is established, and the temperature field inside and outside the box is analyzed through a custom function. Firstly, the influence of current specification, ambient temperature and hot end fan speed on the characteristics of cold and hot end and the center temperature of the box during the cooling process is studied. The results show that ambient temperature has a significant influence on the performance of the cold and warm box. After that, the design and verification of the sample of the car’s heating and cooling box were completed. The experimental results are in good agreement with the calculated results, which verified the reliability of the model. Finally, combined with the actual vehicle operating conditions, the hot end of the fan into the wind Department to increase the baffle to enhance the coefficient of performance of the cold box. The results of the study can guide the selection of car-type heating and cooling box, reduce the number of tests, shorten the development cycle and reduce the development cost.