多台室外机并联轮换除霜空气源热泵的实验研究

    Experimental Study on Air Source Heat Pump With Multiple Parallel Outdoor Machines Defrosting Alternatively

    • 摘要: 为解决大中型空气源热泵逆循环除霜带来的问题,提出了一种多台室外机并联轮换除霜的新型空气源热泵循环型式.系统通过阀门的切换实现一台室外机过冷除霜,其余正常蒸发吸热.在不停止供热的情况下,实现除霜并回收融霜冷量.搭建实验台,在焓差实验室研究系统无霜、结霜和轮换除霜工况下压缩机吸、排气压力及制热性能的变化规律.

       

      Abstract: To solve the problem of reverse-cycle defrosting of large and medium air source heat pump, a new type of air source heat pump cycle with multiple parallel outdoor machines defrosting alternatively was proposed. By switching valves to realize an outdoor machine defrosting, the rest of the outdoor machines were in the state of normal evaporative heat absorption at the same time. In the case of non-stopping heating, defrosting can be realized while recovering frost thawing cooling capacity. A test platform of research system was built in an artificial environment room. The law of the variation of the compressor suction, exhaust pressure and the system thermal performance in the condition of frost free, frosting and defrosting were discussed.

       

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