Device, for cleaning cooking area climate, in form of fan in a steam or hot air steam or hot air or microwave device for cooking food on baking tray has fan with several blade units whereby each blade unit comprises of two blades
摘要
<p>The device in the form of a fan has several blade units. Each blade unit comprises of two blades, namely a base blade (46) and a cover blade (47). The base blade and cover blade have a planar and/or spatial curved surface. The base blade has a composite profile (25). The composite profile has a concave surface for collecting the material particles (11) in the centrifugal direction.</p>
