A Review of Defrosting Technologies for Air Source Heat Pumps
DOI:
https://doi.org/10.54691/a1npb922Keywords:
Air Source Heat Pump; Defrosting Technology; Intelligent Control; Frost Thickness.Abstract
Air source heat pumps (ASHPs) are widely used in building energy efficiency due to their high performance and environmental benefits. However, in cold climates, frosting of ASHP evaporators during winter operation reduces heating efficiency, affects user comfort, and may even cause system shutdowns or permanent damage. Therefore, optimizing the defrosting cycle, implementing intelligent frost control, and accurately detecting frost thickness are key challenges in both research and practice. This paper reviews recent advancements in defrosting technologies for ASHPs, focusing on the limitations of existing methods and the development of emerging technologies. It also discusses intelligent control strategies, with an emphasis on intelligent frost detection and control systems. Finally, the paper outlines the future trends in ASHP defrosting technologies, aiming to provide a theoretical and technical foundation for their innovation and improvement.
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