基于分解式小周期逆循环除霜控制的空气源热泵制热量试验研究  

Experiment on heating capacity of air source heat pump based on decomposed small-cycle reverse cycle defrosting control

作　　者：张仕强 陈敏 吴晓曼 Zhang Shiqiang;Chen Min;Wu Xiaoman(Gree Electric Appliances,Inc.of Zhuhai)

机构地区：[1]珠海格力电器股份有限公司

出　　处：《制冷与空调》2024年第5期7-14,共8页Refrigeration and Air-Conditioning

摘　　要：空气源热泵在制热运行时室外机换热器会结霜,影响换热能力进而导致室内机供热量不足、舒适性降低的问题。在特定的使用工况下,常规逆循环除霜控制技术存在除霜前运行能力衰减大、除霜时间长、除霜前运行周期短的问题。本文在逆循环除霜控制的基础上,提出分解式小周期逆循环除霜控制技术,将该技术用于多联式空调(热泵)机组。对制冷量为45 kW的室外机、搭配5台制冷量为9 kW的室内机进行测试,结果表明:在除霜工况(室外干/湿球温度2℃/1℃,室内干球温度20℃)下,本控制方法较常规逆循环除霜控制,平均制热能力提升17%,运行周期提升92%,最低出风温度可达32.7℃,改善效果显著。The air source heat pump will get frost on the heat exchanger of outdoor unit during heating operation,which will affect the heat transfer capacity and then lead to the problems of insufficient heating capacity of indoor unit and poor comfort.Under a cer-tain operation condition,the conventional reverse cycle defrosting control technology has the problems of large attenuation of operation ability before defrosting,long defrosting time,and short operation cycle before defrosting.A decomposed small-cycle reverse cycle defrosting control technology is proposed on the basis of reyerse cycle defrosting control,which is applied to multi-connected air-conditioning(heat pump)unit.The test is conduc-ted on an outdoor unit with cooling capacity of 45 kW,matched with five indoor units with cooling capacity of 9 kW.The results show that under the defrosting condition(out-door dry/wet bulb temperatureof 2 ℃/1 ℃,indoor dry bulb temperature of 20 ℃),com-pared with the conventional reverse cycle defrosting control method,this control method can achieve the average heating capacity increased by 17%,the operation cycle increased by 92%,and the minimum outlet air temperature up to 32.7 ℃,so that the improvement effect is remarkable.

关 键 词：热泵 空气源 分解式 逆循环 除霜 制热量 

分 类 号：TB6[一般工业技术—制冷工程]