Fan for fume extractor hoods for the switching of various air classes of exhaust (Machine-translation by Google Translate, not legally binding)

摘要

According to the invention, a fan unit is to be made in such a manner that it achieves optimum efficiency in any blowing-out direction. This takes place by a spiral housing (1) with the fan motor being arranged rotatably in a cylinder (6) provided with cutouts (7, 8, 9). In this case, the axial central point (M1) of the lateral covering of the spiral housing (1) is arranged offset in relation to the motor central point (M).