JPH072582Y2 - Blower combined use ozone generator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a blower-combined ozone generator that also serves as a blower, and more particularly to a structure for mounting a dielectric ring on an impeller.

[Conventional technology]

As a conventional blower-combined ozone generator, Japanese Laid-Open Patent Publication No.
There is one shown in Japanese Patent No. 179702. This device is an ozone generating device configured to generate ozone by performing corona discharge at electrodes facing each other in the air, while forming an impeller with one electrode and forming a casing part with the other electrode, The impeller and the casing portion form a blower, and a dielectric ring as the other electrode is bonded to the inner peripheral surface of the casing portion.

However, this conventional blower combined type ozone generator is
Since the dielectric ring was fixed to the casing side,
The gap between the impeller, which is one of the electrodes, and the dielectric ring, which is the other electrode, is limited, and the amount of air blown is reduced, and dust adheres to the surface of the dielectric ring and discharge cannot be performed sufficiently. There was a problem.

Therefore, in order to solve the above-mentioned problems, a device has been proposed in which the dielectric ring is wound around the impeller by the elastic force of the ring itself.

[Problems to be solved by the device]

A large number of centrifugal blades constituting the impeller are usually press-molded with a resin material or a metal material, but in this case, each centrifugal blade has a taper surface due to the drafting gradient, and the centrifugal wheel is rotated when the impeller rotates. There is a problem that the dielectric ring may be displaced or separated from a predetermined position on the centrifugal blade along the tapered surface of the centrifugal blade due to the force.

An object of the present invention is to securely fix a dielectric ring on the outer peripheral surface of an impeller having a large number of centrifugal blades and prevent the dielectric ring from being displaced or separated from the centrifugal blades. An object of the present invention is to provide a blower-combined type ozone generator.

[Means for Solving the Problems]

In order to achieve the above object, this invention rotatably accommodates an impeller having a centrifugal blade that also serves as the other electrode fitted with a dielectric ring, in a casing portion having one electrode.
In a blower-combined ozone generator configured to generate ozone by performing corona discharge between the electrode on the casing side and the centrifugal blade, a locking projection is provided on the dielectric ring or impeller side. It is provided with a locking portion for locking the locking projection on the other side.

[Action]

According to the present invention, by taking the above-mentioned means, when the impeller rotates, the dielectric ring on the outer peripheral surface of the impeller tends to move laterally along the tapered surface of the centrifugal blade on the centrifugal blade due to the centrifugal force. Although receiving a force, the dielectric ring and the impeller are locked by the locking projections, so the dielectric ring does not shift in position on the impeller or separate from the impeller,
It is held in place.

〔Example〕

An embodiment embodying the present invention will be described below with reference to FIGS. 1 to 4.

The blower-combined ozone generator is a sirocco fan 1 having a built-in ozone generation function, a motor 2 for driving the sirocco fan 1, and a high-frequency high-voltage supplying high-voltage inside the sirocco fan 1, as shown in FIG. It is composed of a voltage power supply 3.

The sirocco fan 1 has a cylindrical casing portion 4 with a lid.
And a lid plate 5 that closes the lower opening of the casing portion 4, and the motor 2 is fastened and fixed to the lower surface of the lid plate 5.

The shaft 6 of the motor 2 penetrates through the central portion of the cover plate 5 and extends along the axis of the casing portion 4. The shaft 6 has a mixed flow type centrifugal blade 7 also serving as the first electrode, and each centrifugal blade. An impeller 10 composed of an upper rib 8 connecting the upper edges of 7 and a bottom plate 9 connecting the lower edges of the centrifugal blades 7 is mounted. A dielectric ring 11 made of a resin material such as silicon rubber or resin is fitted to the outer periphery of the impeller 10, that is, the outer peripheral edge of each centrifugal blade 7, at about 1/3 of the centrifugal blade width. This dielectric ring
As shown in FIGS. 1 and 4, locking projections 11a, which are locked to projections 9a as locking parts formed by bending the outer peripheral edge of the bottom plate 9, are provided at four locations on the inner peripheral surface of the base plate 11. The dielectric ring 11 is formed so as not to come off from the centrifugal blade 7.

The width of the dielectric ring 11 in the axial direction is formed to be considerably smaller than the width of the impeller 10 in the axial direction, and the thickness of the dielectric ring 11 in the radial direction is set to 2 mm. The gap between the outer peripheral edge of each centrifugal blade 7 and the inner peripheral surface of the casing portion 4 is
It is connected to the swirl passage 12 for air flow, and its radial interval is designed to be about 4 to 10 mm.

As shown in FIG. 2, the central portion of the upper end surface of the impeller 10 is the impeller.
The bottom end of the impeller 10 is shielded by the bottom plate 9.

The casing part 4 is provided with an air intake port 14 corresponding to the air intake port 13 of the impeller 10, and the casing part 4 is also provided.
The peripheral wall of is cut out to connect with the discharge port 15,
Is in communication with. An arc-shaped second electrode 17 is concentrically attached to the discharge port 15 at a distance of about 1 to 2 mm from the outer peripheral edge of the centrifugal blade 7.

The second electrode 17 is formed in a shape and has a plurality of rectangular openings.
Has 18. A pair of resin bars 19 extends from both sides of the second electrode 17, and the tips of these resin bars 19 are bent radially outward and screwed to the inner top surfaces of the cover plate 5 and the casing portion 4.
Tightened by 20. The hole of the resin bar 19 through which the screw 20 is inserted is a long hole 21 that functions as a play hole. Therefore, the second electrode 17 is insulated from the casing portion 4 and the cover plate 5 by the resin bar 19. Then, by loosening the screw 20 and moving the second electrode 17 in the radial direction, the discharge interval between the outer peripheral edge of the centrifugal blade 7 and the second electrode 17 can be adjusted.

On the other hand, a current collector contact 22 made of a titanium rod having a small diameter is provided on the upper end of the shaft 6 of the motor 2 so as to project along the axis, and a through hole 23 is formed in the center of the casing 4 along the axis. Are formed. A carbon rod slider 24 and a coil spring 25 are inserted into the through hole 23 and then sealed by a copper terminal 26. The slider 24 has a large-diameter head, and the large-diameter head is pressed against the current collector contact 22 by a coil spring 25.

The ground-side output end b of the high-voltage power supply 3 is connected to the impeller 10 via the terminal 26, the coil spring 25, the slider 24, the current collector contact 22, and the shaft 6.
Is grounded, and the high-voltage output end a of the high-voltage power supply 3 is connected to the second electrode 17 via an insulating covered wire (not shown).

Next, the operation of the above-described blower-combined ozone generator will be described.

Now, in FIG. 2, when the motor 2 is started to rotate the impeller 10 and an AC high voltage of about 20 KHz is applied between the electrodes 7 and 17, the gap between the electrodes 7 and 17 and the dielectric ring are formed. A creeping discharge is generated on the surface of 11, and oxygen in the air is decomposed to generate ozone.

Further, the air sucked through the suction ports 14 and 13 swirls the swirling passage 12 by the impeller 10 to reach the discharge port 15, and then passes through the opening 18 of the second electrode 17 located at the discharge port 15 from the sending cylinder 16 It is blown out and rides on this air flow to release ozone to the outside.

In addition, both electrodes 7, 17 and the dielectric ring 11 are
Is cooled well.

As described above, according to the present invention, since the locking projection 11a of the dielectric ring 11 is locked to the projection 9a of the bottom plate 9, the centrifugal blade 7
Even if there is a taper surface on the press molding, the dielectric ring 11 on the centrifugal blade 7 is surely prevented from being displaced due to the centrifugal force or coming off from the centrifugal blade 7 when the impeller 10 rotates. can do.

By the way, the application of the AC high voltage is continuously performed when the concentration of ozone generated is low, and intermittently when the ozone generation capacity is high. A sensor (not shown) that detects the ozone concentration may control the application time interval of the AC high voltage.

Furthermore, this invention is not limited to the above-mentioned embodiment, but can be embodied as follows.

(1) As shown in FIG. 5, a locking projection 11a is formed integrally with the inner surface of the dielectric ring 11 so as to sandwich a part of the outer side of the centrifugal blade 7 and which is positionally regulated by the bottom plate 9. To do.

(2) As shown in FIG. 6, a cylindrical portion 31 is formed on one of the centrifugal blades 7, and locking holes 32 as a locking portion are provided at a plurality of positions in the cylindrical portion 31 in a transparent manner. Attaching the dielectric ring 11 to the cylindrical portion 31 by forming the locking projections 33 for positioning on the dielectric ring 11 at a plurality of locations.

(3) Although not shown, the outer peripheral edge of the bottom plate 9 is projected from the outer edge of the centrifugal blade 7 to form a locking projection, and the edge of the dielectric ring 11 is locked to this locking projection. .

[Effect of device]

As described above in detail, the present invention has an effect of preventing the dielectric ring on the centrifugal blade from being displaced or falling off.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an essential part of an impeller-equipped ozone generator, FIG. 2 is a cross-sectional view showing the entire ozone generator, and FIG. 3 is a partial cross-sectional view taken along the line AA of FIG. FIG. 5 is a plan sectional view showing a mounting structure of a dielectric ring, FIG. 5 is a partial sectional view showing another example of the invention, and FIG. 6 is an exploded perspective view showing another example of the invention. 1 ... Sirocco fan, 2 ... motor, 3 ... high-voltage power supply, 4
... Casing part, 7 ... Centrifugal blade that also serves as the first electrode, 9 ...
Bottom plate, 9a ... Projection portion as locking portion, 10 ... Impeller, 11 ... Dielectric ring, 11a ... Locking protrusion portion, 17 ... Second electrode, 31 ... Cylindrical portion, 32 ... As locking portion Locking hole, 33 ... Locking protrusion.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Kunifumi Goto Inventor, Kunifumi, 2-chome, Toyota-cho, Kariya City, Aichi Stock company Toyota Industries Corporation (56) Reference JP-A-1-179702 (JP, A) Sho 63-60436 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A casing part having one electrode rotatably accommodates an impeller having a centrifugal blade that also serves as the other electrode fitted with a dielectric ring, and the casing part side electrode and the casing part side electrode. A blower-combined ozone generator configured to generate corona discharge between a centrifugal blade and a corona discharge, wherein a locking protrusion is provided on the dielectric ring or impeller side, and the locking is provided on the other side. An air blower-type ozone generator equipped with a locking part that locks the protrusion.