Fan for conveying waste gas comprises a housing having an inlet channel and an outlet channel forming an inner chamber, a wheel arranged in the inner chamber, a motor connected to the housing, a resistance body in the housing, and a sensor

摘要

Fan comprises a housing (3) having an inlet channel (4) and an outlet channel (5) forming an inner chamber, a wheel (9) arranged in the inner chamber, a motor (11) connected to the housing with the drive shaft of the motor connected to the wheel, a resistance body (12) arranged in the housing, and a sensor (19) for measuring the movement of the resistance body. Preferred Features: The resistance body is a flat element which protrudes with its flat side into a gas stream produced by the fan. The resistance body is arranged in the outlet channel. The resistance body has a grid structure of a perforated sheet.