变频空调室外机强冷风电控散热技术研究
Research on electronic controller heat dissipation technology of inverter air conditioner outdoor units with strong cold air
摘要：
变频空调室外机电控发热是影响其可靠性的关键因素。为了寻找更优的电控散热方案,对电控风冷散热方案进行了原理分析,找到了关键影响因素——流体与散热器的温度差,并对室外机各部分空间的空气温度进行了对比测试,结果表明直接利用机身外部低温空气进行散热可以实现更好的散热效果。设计了新的风冷方案,采用数值模拟与实验测试相结合的方式,利用ANSYS软件进行了建模仿真对比,并进行了实验测试。结果表明,在55 ℃工况下,相对于原散热方案,新方案可以实现3.3～7.1 ℃的温降。
Abstract：
The heat generated by the electronic controller of inverter air conditioner outdoor units is a key factor affecting its reliability. In order to find a better electronic controller heat dissipation solution, the principle analysis of the air-cooled heat dissipation scheme is conducted, the key influencing factor—the temperature difference between the fluid and the radiator is found, and the air temperature of each part of the outdoor unit is compared and tested. The results show that the direct use of low-temperature air outside the fuselage for heat dissipation can achieve better heat dissipation effect. A new air-cooled scheme is designed in this paper. Combining numerical simulation and experimental testing, using ANSYS software for modeling and simulation comparison, the experimental testing is conducted. The results show that under 55 ℃ operating condition, the new solution can achieve a temperature reduction of 3.3-7.1 ℃ compared to the original heat dissipation scheme.
Keywords:inverter air conditioner; outdoor unit; electronic controller heat dissipation; low-temperature air outside the fuselage; modeling and simulation