Cleaning device for cleaning the air-ionizing part of an electrode
AssigneeKoninklijke Philips N.V.
InventorJohan Marra
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Abstract
The present invention provides a cleaning device (1) for cleaning the air-ionizing part (4) of an electrode (3), said device comprising a cleaning member (5) arranged to be in physical contact with the said air-ionizing part of said electrode, the air-ionizing part of electrode and the cleaning member being arranged to slide relative to each other. The cleaning device further comprises an actuator (6, 8, 9) arranged to activate the relative motion between said air-ionizing part (4) of the electrode (3) and the cleaning member (5). There is also provided an ionization electrode comprising an air-ionizing part and the cleaning device, as well as a ultrafine particle sensor, an air ionizer or an electrostatic air cleaner comprising such an electrode.
Claims10
A cleaning device for cleaning an air-ionizing part of an electrode, wherein the air-ionizing part of the electrode comprises a needle-tip or a thin wire, said device comprising:
- a cleaning member arranged to be in physical contact with a circumference of the needle-tip or the thin-wire, the air-ionizing part of the electrode and the cleaning member being arranged to slide relative to each other;
- and
- an actuator arranged to activate a relative motion between the air-ionizing part of the electrode and the cleaning member, wherein the cleaning member comprises a foil containing at least one perforation through which the air-ionizing part of the electrode slides, wherein the at least one perforation is substantially closed by having edges in contact with each other when the needle-tip or the thin wire does not protrude through the at least one perforation, and wherein a shearing force applied by the cleaning member to the needle-tip or the thin-wire is changed by selecting a thickness of the foil in a range of 25-100 μm.
The cleaning device according to claim wherein the at least one perforation is a central hole, a central square cross or a central triangular cross through which the air-ionizing part of the electrode may protrude.
Dependencies are inferred from the claim text.