公开(公告)号：US09901233B2

公开(公告)日：2018-02-27

申请号：US15030474

申请日：2014-11-05

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Johan Bernard Kuperus ,  Johannes Tseard Van Der Kooi ,  Bastiaan Johannes De Wit

IPC: A47L9/19 ,  A47L9/28 ,  G01N15/08

CPC classification number: A47L9/19 ,  A47L9/2842 ,  G01N15/0826 ,  G01N2015/084

Abstract: In a method of monitoring pollution of an air filter (Filt1) in a device in which an air flow (A) generated by a fan (F) engaged by a motor (M) passes the air filter (Filt1), the pollution is determined using data representative of a pressure difference (D2) over the fan (F), a pressure difference (D1) over the air filter, and a motor current (I) to the motor (M). The method comprises the steps of: estimating a flow through the air filter from data representative of the pressure difference (D2) over the fan (F), and the motor current (I) to the motor (M), estimating a filter resistance of the air filter from data representative of the flow through the air filter, and the pressure difference (D1) over the air filter, and estimating the pollution of the air filter from data representative of the filter resistance of the air filter.

公开(公告)号：US09681785B2

公开(公告)日：2017-06-20

申请号：US14902367

申请日：2015-03-19

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Bastian Cornelis Kleine-Doepke ,  Bastiaan Johannes De Wit ,  Arnoldus Cornelis Wessels

IPC: A47L9/02 ,  A47L9/06

CPC classification number: A47L9/02 ,  A47L9/0606

Abstract: The present invention relates to a nozzle (1) for a vacuum cleaner. The nozzle (1) has a base (3) having an edge (4, 5) and a suction aperture (11) in the base (3). At least one flexible flap (24, 26) protrudes from the base (3) between the edge (4, 5) and the suction aperture (11). The flexible flap (24, 26) has first and second sections (32, 33) separable by an opening (35). The first and second sections (32, 33) are urged towards each other when the nozzle (1) is moved in a first direction in which the edge (4, 5) is a leading edge to close the opening (35) or tend the opening (35) towards closure, and the first and second sections (32, 33) are biased away from each other when the nozzle (1) is moved in a second direction in which the edge (4, 5) is a trailing edge to open the opening (35) or to further open the opening. The present invention also relates to a vacuum cleaner comprising a nozzle (1) for a vacuum cleaner.