变频空气源热泵多联机常规除霜特性
Conventional defrosting characteristics for variable frequency multi-split air-source heat pumps
摘要：
为了研究变频空气源热泵多联机的除霜性能，搭建了制冷剂为R410A的空气源热泵多联机系统实验台。在模拟室内外环境条件下进行了除霜特性实验研究，测量了除霜过程中系统压力、温度等参数，分析了多联机除霜过程中除霜时间、压力及频率等的变化。实验结果表明：除霜过程平均吸气压力为0.30 MPa、室内机盘管最低温度为-26.4 ℃、除霜过程压缩机最高转速为90 r/s。指出了制约多联机快速除霜的因素，提出了除霜的改进方法，为多联机系统除霜优化提供了指导。
Abstract：
To study the defrosting performances, sets up a multi-split air-source heat pump system test rig using R410A as refrigerant. Conducts the experimental research under simulated indoor and outdoor environments, measures the defrosting performances such as pressure and temperature, and analyses the defrosting time, pressure and frequency change during defrosting. The results indicate that during defrosting average suction pressure is 0.30 MPa, the lowest indoor unit coil temperature is -26.4 ℃, and the highest compressor speed is 90 r/s. Points out the constraints of fast defrost and the improved method for defrosting, which provides some guidance for the defrosting of multi-split air-source heat pump.
Keywords:multi-split, air-source heat pump, variable frequency, defrost, experiment