EXTRACTOR HOOD WITH A RADIAL FAN WHEEL HAVING A CONVERGENT-DIVERGENT BLADE CANAL

摘要

The invention relates to an extractor hood (2) comprising a radial fan (6), the blade canal arranged between two adjacent blades being convergent-divergent. In the convergent (or being the same width) part, the air is accelerated, and the deposit of particles guided together in the flow of air is supported and promoted.