Vacuum cleaner with filter clogging indicating means

Details Vacuum cleaner with filter clogging indicating means Vacuum cleaner with filter clogging indicating means

A - Human Necessities

47

L

A47L 9/28 (2006.01) A47L 9/19 (2006.01)

Patent

CA 2275513

The invention provides a vacuum cleaner having an airflow path, dust separating apparatus arranged in the airflow path and a motor arranged in the airflow path downstream of the dust separating apparatus, a pre-motor filter located immediately upstream of the motor and downstream and separate from the dust separating apparatus, and a bleed valve located upstream of the pre-motor filter to allow air to be bled into the airflow path in the event of a blockage occurring upstream of the bleed valve, wherein signalling means responsive to a change in an operating condition of the motor are provided to indicate that a blockage has occurred at or downstream of the pre-motor filter.

L'invention concerne un aspirateur comportant une trajectoire d'écoulement d'air, un appareil de séparation de la poussière (16) placé dans cette trajectoire et un moteur (24) également placé dans cette trajectoire, en aval de l'appareil de séparation de la poussière (16). L'aspirateur comporte également un filtre de moteur préliminaire (20) placé immédiatement en amont du moteur (24) et en aval, et indépendamment, de l'appareil de séparation de la poussière (16). Il comprend aussi une soupape de décharge (18) en amont du filtre de moteur préliminaire (20) pour permettre la décharge de l'air dans la trajectoire d'écoulement d'air en cas de blocage se produisant en amont de la soupape (18). Des moyens de signalisation (30, 32, 34) agissant en réponse à un changement de condition de fonctionnement du moteur (24) indiquent qu'un blocage se produit au niveau du filtre de moteur préliminaire (20) ou en aval de ce dernier.

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