基于室内舒适性的变频多联式空调(热泵)机组的优化及应用

Optimization and application of frequency conversion multi-connected air-condition(heat pump)unit based on indoor comfort

针对高温高湿环境的区域,在原变频多联式空调(热泵)机组基础上,从压缩机、电控、电子膨胀阀、换热器等重要部件方面进行优化设计,并与原型机进行试验对比。测试结果表明,在自由频率下运行,新型机室内机全开高风档位时的出风温度与原型机对应的出风温度相比降低5.7℃;新型机室内机单开高风档位时的出风温度与原型机对应的出风温度相比降低3.2℃,原型机下降至30℃所需时间是新机型的162%;在室外环境温度为43℃时,新型机制冷量提高了10.8%,季节能效比达到4.98,相比原机型提高了4.2%。新型机中嵌入温度补偿功能,在不同设定温度下能够保证空调出风温度满足不同用户需求;为解决多联式空调(热泵)机组在安装过程中容易出现接线错误的问题,新型机中增加智能自动检测纠错功能,在接线出错情况下能自动识别并纠正。

For the hot and humid region, the compressor, printed circuit board（PCB）, electronic expansion valve （EEV）,heat exchangers and other key components of the fre- quency conversion multi-connected air-condition（heat pump） unit are optimized, and tested. The experimental results show that, operating under free frequency, compared with the original unit, the optimized system can lower the outlet temperature by 5.7 ℃ when all indoor units are open, and lower the outlet temperature by 3.2 ℃ when one indoor unit is open. The time of cooling to 30 ℃ for the original unit is 162% of that of the optimized system. Under the outdoor temperature of 43 ℃, the cooling capacity is improved by 10.8% and the seasonal energy efficiency ratio （SEER） can reach 4.98,which is improved by 4.2% compared with the original unit. Meanwhile, the temperature compensation function is in- troduced to the optimized system so as to satisfy customers＇ various needs for the outlet temperature under different setting temperatures. In order to solve the wiring error during the installation of multi-connected technique is developed to diagnose air-condition（heat pump） unit, a smart wiring detection and correct the wiring error.