特种车用高温空调研究

Research of High Temperature Air-conditioner for Special Vehicle

针对高温和宽温带范围等特殊工作环境空气调节的需要,研发了HLD-45B高温空调。该空调使用R22/R142b混合制冷剂,采用常规空调制冷循环系统,冷凝器传热面积和风量的设计较常规空调增大15%~20%。进行了焓差法性能实验和宽温区运行实验。实验结果表明：在较宽的环境温度变化范围内HLD-45B具有良好的运行性能：1）标准空调工况至75℃高温工况,蒸发器回风温度与送风温度的差值变化平缓,制冷量最大衰减小于15%,在宽温区空调系统运行稳定、可靠;2）75℃高温工况的排气压力和排气温度分别为2.84MPa和121℃,在理想的安全范围。中高温混合制冷剂的合理使用可改善制冷系统的高温运行性能和可靠性,拓宽其运行温度范围。

Aiming at meeting the requirements of air conditioning in wide temperature range and high temperature environment,HLD-45B high temperature air-conditioner has been developed.Heat transfer area and air mass flow of condenser is 15%~20% larger than normal.Both enthalpy and wide temperature range method experiments have been done.The results show that the airconditioner has good operating performance： 1） Temperature difference between inlet and outlet has small variation and refrigerating capacity decreases less than 15% from standard condition to 75℃ high temperature condition.The air-conditioner operates stably and reliably.2） Under 75℃ high temperature condition,discharge pressure and temperature,both of which are in ideal safety range,are 2.84 MPa and 121℃ respectively.The use of mixture of high and intermediate temperature refrigerants can improve the performance and reliability of the high temperature air-conditioner and widen its operating temperature range.