摘要
非共沸混合制冷剂自复叠空气源热泵能够实现大温差循环,可用作高温热泵。为了解决常用的逆循环除霜和热气旁通除霜用于自复叠空气源热泵除霜存在的问题,提出2种除霜优化方案:蓄热除霜和双系统耦合除霜。这2种优化方案均增加了除霜热量来源,提高了能源利用率,不易引起压缩机吸气带液,系统可连续制热。蓄热除霜优化方案可以大幅缩短除霜时间,系统相对简单可靠,可以作为自复叠空气源热泵除霜优选方案。
The auto-cascade air source heat pump with non-azeotropic refrigerant mixture can achieve large temperature difference cycle,which can be used as high-temperature heat pump.In order to solve the problems of the commonly used reverse-cycle defrosting and hot-gas bypass defrosting for auto-cascade air source heat pump,two kinds of optimal defrosting schemes are proposed,which are thermal storage defrosting and dual system coupled defrosting.These two optimal schemes can increase the heat source of defrosting and improve the energy efficiency.Besides,the suction with the liquid refrigerant can be avoided and continuous heating can be realized.The thermal storage optimal defrosting scheme can substantially reduce defrosting time,which is relatively simple and reliable,which can be as the optimal defrosting scheme of auto-cascade air source heat pump.
作者
魏峰
张龙爱
王传华
孙思
Wei Feng;Zhang Longai;Wang Chuanhua;Sun Si(Gree Electric Appliances Inc.of Zhuha)
出处
《制冷与空调》
2018年第8期96-100,共5页
Refrigeration and Air-Conditioning
关键词
空气源热泵
除霜
自复叠
air source heat pump
defrosting
auto-cascade
