A method of noise reduction of energy to the suction air current operation of the turbines of vacuum cleaner nozzles

摘要

A method of noise reduction of energy to the suction air current operation of the turbines of vacuum cleaner nozzles having at least one brush roller, characterised in that the rotational speed of the turbine from a predetermined limit speed is controlled to control of the turbine speed and that a part of the energy of the suction air stream acting on the turbine by lost work of deformation means which is received, wherein the lost work of deformation by centrifugal force which rotates in synchronism with the turbine, which is acted upon by bristles is made from the essentially of the limit rpm with engagement means for the production of sliding friction come into engagement in a force-locking manner.