Grease filter unit e.g. filter cartridge, for fume extraction hood, has top layer comprising gaps, air-impermeable subareas and lower filter layer, where gaps are provided at edges of embossing and inclined to plane of top layer

摘要

The filter unit (1) has a top layer (10) including air-permeable subareas e.g. gaps (105), air-impermeable subareas and a lower filter layer (11). The gaps are provided at edges of an embossing (102) and inclined at an angle of 90 degrees to a plane (101) of the top layer. The embossing is provided over a surface of the top layer, where ends of the embossing are rounded off. The filter layer over a bar (103) is formed by the embossing that rests against the top layer, where the bar is displaced to the plane of the top layer. The top layer consists of metal sheet.