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AssigneeKoninklijke Philips N.V.
InventorsGerben Kooijman, Jan Frederik Suijver, Yvonne Wendela Kruijt-Stegeman, Jeroen Herman Lammers
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A vacuum cleaning device comprises a unit (1) in which an oscillating airflow is generated which substantially zero net flow and an asymmetry between the suction and the blowing phases, such that in the blowing phase a jet is generated. A generator (31) which is needed for generating the oscillating airflow comprises a movable surface (30) which is integrated in a wall (12) of a housing (10) having an internal space (11) and at least one opening (13) for allowing air to flow to and from the internal space (11). The jet can be generates when the so-called Strouhal number, being the frequency of the movement of the movable surface (30) multiplied by a characteristic dimension of the opening (13) and divided by the velocity of the air in the opening (13), is not higher than a predetermined maximum.
Vacuum cleaning device, comprising a unit for aerodynamically affecting dust particles and/or a surface to be cleaned in order for the particles to become dislodged from the surface and to become airborne, wherein the unit comprises a housing having an internal space enclosed by a housing wall in which at least one opening is arranged, a movable surface which is integrated in the housing wall, and means for actuating the movable surface, which are adapted to realize an oscillating movement of the surface that causes air to alternately be drawn into the housing through the opening from various directions at the opening, and expelled from the housing through the opening in the form of a directed jet.
Unit for use in a vacuum cleaning device, for aerodynamically affecting dust particles and/or a surface to be cleaned in order for the particles to become dislodged from the surface and to become airborne, comprising a housing having an internal space enclosed by a housing wall in which at least one opening is arranged, a movable surface which is integrated in the housing wall, and means for actuating the movable surface, which are adapted to realize an oscillating movement of the surface that causes air to alternately be drawn into the housing through the opening from various directions at the opening, and expelled from the housing through the opening in the form of a directed jet.
Use in a vacuum cleaning device of a unit comprising a housing having an internal space enclosed by a housing wall in which at least one opening is arranged, a movable surface which is integrated in the housing wall, and means for actuating the movable surface, which are adapted to realize an oscillating movement of the surfaced that causes air to alternately be drawn into the housing through the opening from various directions at the opening, and expelled from the housing through the opening in the form of a directed jet, for aerodynamically affecting dust particles and/or a surface to be cleaned in order for the particles to become dislodged from the surface and to become airborne.
Dependencies are inferred from the claim text.