一种变频空调电控箱体降温模块的研究

Research on a Cooling of Module of Electronic Control Box of Variable Frequency Air Conditioning

本文根据变频热泵机组系统特点和制冷循环热传导原理设计了一种变频空调电控箱体的降温模块,该降温模块的U型散热装置与制冷剂配管接触弧度为3/4圆弧结构,接触点切线成45°斜角,放置在空调系统中出储液器到进入电子膨胀阀之间的管路部分,使制冷剂经过该散热装置的温度处于40℃~50℃之间最佳温度范围。在环境温度43℃、出水温度15℃的制冷工况下,通过实验分析和验证了增加该散热装置和自然冷却两种状态下系统的性能。结果表明:加装制冷剂散热装置机组运行时变频器功率器件产生的热量可以通过制冷剂散热装置带走,降温效果较为明显。同时,通过理论计算和实验测试对比了变频器功率发热部件温度与制冷剂进口温度之间温度差变化情况,验证了加装制冷剂散热装置的效果。

In this paper,cooling Module of the electronic control system of an inverter air conditioner is designed according to the characteristics of an inverter heat pump unit and the principle of refrigeration cycle.The contact arc between the U-shaped heat dissipation device and the refrigerant piping was a 3/4 arc structure,and the contact point was tangent at a 45°bevel.The temperature of the refrigerant passing through the heat dissipation device was in the optimal temperature range of 40 to 50℃.The performance of the heat dissipation device was compared experimentally with natural cooling under the standard working conditions(ambient temperature of 43℃and outlet water temperature of 15℃).The heat generated by the inverter's power device can be removed by the refrigerant heat sink,and the cooling effect was apparent.The temperature difference between the control component of the inverter and the refrigerant inlet temperature was both calculated and tested,and the effect of installing a refrigerant heat sink was verified.