基于热-风耦合抑制结霜的新型斗形蒸发器运行特性实验研究
Experimental study on operation characteristics of a new bucket-shaped evaporator based on heat-wind coupling for frost inhibition
摘要：
空气源热泵蒸发器在潮湿的冬季环境中运行时易结霜而制约其工作性能。本文提出了一种基于热-风耦合作用来抑制结霜的新型斗形蒸发器,并对其抑制结霜特性开展了实验研究。采用斗形蒸发器的空气源热泵系统相较于传统蒸发器系统,在冬季运行环境下表现出显著优势。实验结果表明,采用斗形蒸发器的空气源热泵系统有效供热时间延长了42.5%～130.0%,室内机出风温度提高了0.2%～1.2%,有效运行时间内平均COP提升了13.0%～25.8%,抬高风机后的有效供热时间延长了45%～100%。此外,在斗形蒸发器的底部中心位置存在不易结霜区,为后续蒸发器结构设计提供了新思路。该斗形蒸发器在空间供暖和节能方面有明显优势,在高湿环境中应用前景广阔。
Abstract：
The air-source heat pump evaporator is prone to frost when operating in a humid winter environment, which restricts its working performance. In this paper, a new bucket-shaped evaporator based on heat-wind coupling for frost inhibition is proposed, and its frost inhibition characteristics are experimentally studied. The air-source heat pump systems with bucket-shaped evaporators offer significant advantages over traditional evaporator systems in winter operation environments. The experimental results show that the effective heating time of the air-source heat pump system with a bucket-shaped evaporator is extended by 42.5%-130.0%, the outlet air temperature of the indoor unit is increased by 0.2%-1.2%, the average COP of the effective operation time is increased by 13.0%-25.8%, and the effective heating time after the fan is raised is extended by 45%-100%. In addition, the area that is not easy to frost is found in the bottom center of the bucket-shaped evaporator, which provides a new idea for the subsequent structural design of the evaporator. This bucket-shaped evaporator has obvious advantages in space heating and energy saving, and has a broad application prospect in high-humidity environments.
Keywords:frost inhibition; air-source heat pump; bucket-shaped evaporator; vortex wind field; experimental study