Heat exchange element profile with enhanced cleanability characteristic

A stacked structure of a heating surface element comprises a first heating surface element. The first heating surface element comprises a first area, a second area and a third area which are sequentially arranged in the main airflow direction. The first area comprises herringbone structures. The second area comprises flat structures. The third area comprises a plurality of corrugated structures extending in the main airflow direction, and each corrugated structure comprises a flat peak zone and a groove zone. The stacked structure further comprises a second heating surface element. The second heating surface element comprises a plurality of corrugated structures extending in the main airflow direction. 加热表面元件的堆叠，包括第加热表面元件，该第加热表面元件具有沿主气流方向顺序布置的第、第二和第三区域。第区域包括人字形结构，第二区域包括平的结构，并且第三区域包括沿主气流方向延伸的多个波纹。该波纹具有平的峰区和槽区。该堆叠也包括第二加热表面元件，其中该第二加热表面元件包括沿主气流方向延伸的多个波纹。