This invention relates to an ionizing system and more particularly to a self cleaning electrode system that includes a filamentary ion emitting electrode.
Air ionizers that use gas, such an air, to disperse ions typically operate by moving the gas past ionizing electrodes that produce ions due to corona discharge in response to high ionizing voltage applied to the electrodes.
The moving gas disperses ions in a flowing stream toward objects to be charged or discharged. Particles, usually present in air, accumulate on a highly-charged surface of ionizing electrodes, thus reducing ion output and changing a balance between generated positive and negative ions produced by the ionizing electrodes.
Conventional methods and apparatuses for cleaning pointed or needle-like ionizing electrodes commonly include manually operated brushes that sweep tips of ionizing electrodes and dislodge accumulated particles. Alternatively, brushes installed on a rotating hub of a fan that produces the flow of gas relies upon centrifugal force to move the brushes in and out of contact with ionizing electrodes to dislodge accumulated particles.
In ionizers having an ionizing electrode formed as a thin wire (filament), the ionizing electrode also attracts particles and requires periodic cleaning. Such filament can also be cleaned manually as by brushing but over a substantially larger area than for ionizers with emitter points. And, areas next to supports for a filament cannot be sufficiently cleaned by a rotating brush.
In accordance with one embodiment of this invention, a filament stretched to a polygonal shape is cleaned by sliding the filament against supports that support the flexible filament in the polygonal shape.
An air ionizer includes an ionizing filament stretched between supports into a polygonal shape that is disposed within a flowing air stream. The filament slides against the supports to dislodge accumulated particles. In accordance to one embodiment of the present invention both ends of the filament electrode are attached to a lever that provides connection between the filament and a high voltage power supply. Sliding movement of the filament is produced by moving the lever or by moving the filament supports, or both. In another embodiment of the present invention high ionizing voltage can be supplied through at least one filament support and the lever can be fully situated within an area of a flowing air stream.
In one embodiment of the present invention, as illustrated in
Of course, the filament 20 can be situated on the inlet side of the fan module 1 where hub 3 is situated, for example, on the opposite or output side of the fan. Wire supports 11 may be shaped as hooks, eyelets, cylinders, or other suitable shape for supporting the filament 20 in stretched configuration, as shown, and facilitating the sliding of the filament 20 through the supports 11.
Both ends of the filament 20 are attached to lever 30 at separate attachment points 31 and 32, or optionally at the same point. Lever 30 extends outside of the support structure 10 and is situated between adjacent wire supports 13 and 14 within a cut-out area 12 of the support structure 10.
High ionizing voltage is connected to corona wire 20 via a conductor 37 along lever 30, as shown. Alternatively, high ionizing voltage may be supplied to the filament 20 through a wire support 11, or via other convenient connection.
Lever 30 is mounted for movement along a cleaning path 40 that is substantially parallel to segment 21 of the polygon shape of filament 20, with the attachment points 31 and 32 remaining located along segment 21. The filament 20 thus slides along or through supports 11 to dislodge accumulated particles. Segment 21 may be longer than other segments of polygonal shape of filament 20 to facilitate cleaning of a full length of the filament 20, including areas adjacent to the supports 11, in response to movement of the lever 30 along the cleaning path 40.
Lever 30 can be moved along the cleaning path manually, or by solenoid, pneumatic cylinder, or other suitable known device and the lever 30 can occupy any position within area 12 of the support structure 10 after a cleaning procedure, or can be moved back to an original position.
In another embodiment of present invention, as shown on
b shows a partial view of the same area of the fan module 1 as shown in
In another embodiment of the present invention, as shown on
In another embodiment of present invention the filament 20 is disposed on the output side of the fan module 1 where the support 5 for the fan motor is located.
One or more of the supports 11 can protrude radially outside of the support structure 10 to facilitate both ease of rotating and, additionally, can intrude radially and be shaped as vanes for redirecting (collimating) the ionized air stream formed by the apparatus as described. Of course, the pivoting point 72 on lever 70 can also be placed outside the perimeter of support structure 10.
Movement of support structure 10, or of lever 70, can be performed manually, or via an actuator such as solenoid 90 mounted on support 5 to apply force 49 to rotate the lever 70.
Referring now to
High ionizing voltage is supplied to the filament 20 via pin 200 that protrudes outside the support structure for connection to a high ionizing voltage supply. Pin 200 may include a slot 201 for engaging the filament 20 and can protrude through hole 202 in support structure. Alternatively, high ionizing voltage may be supplied to filament 20 via at least one conductive bushing 18 that connects to a supply of high ionizing voltage. Also, high ionizing voltage can be supplied to filament 20 through contactless capacitive connection.
The shaft 191 is mounted on plate 196 that is supported via ribs 197 that may be formed as an integral portion of ring 16. The lever 190 with a predetermined length of filament 20 attached thereto can be mounted on shaft 191 with the filament 20 placed into the partial holes 180 in the lower ring supports. The upper ring 17 is then attached to lower ring 16 with glue, snaps, or other known attachment schemes. Then, bushings 18 with radial splits 182 are slipped over the filament 20 and snapped into holes 180 to configure and tension the filament 20 in a polygonal shape. This forms the entire assembly for attachment outside of a fan module and for easy removal to reduce cost of construction, maintenance and repair.
This application is a continuation-in-part of application Ser. No. 10/956,189, entitled “Air Ionization Module and Method,” filed on Sep. 30, 2004, which application is incorporated herein in the entirety by this reference thereto.
Number | Date | Country | |
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Parent | 10956189 | Sep 2004 | US |
Child | 11739173 | Apr 2007 | US |