Standzeiterfassungsvorrichtung für einen Filter einer Dunstabzugshaube

摘要

A service recording device for a filter (5), in particular in an extraction hood (1) with an air flow device (3) with a variable volumetric flow, has a counter device with a variable counting speed. The counting speed of the air flow device (3) is thus a function of the volumetric flow of the air flow device (3).