JPH0755806B2 - Creepage discharge type ozonizer - Google Patents

Description

The present invention relates to a creeping discharge type ozonizer that generates ozone by creeping discharge.

[Prior Art] Japanese Utility Model Laid-Open No. 60-160661 discloses a creeping discharge type ozonizer having a dielectric body made of a porcelain flat plate in which an induction electrode is embedded and a discharge electrode is arranged on the surface.

JP-A-59-44782 discloses that an induction electrode is embedded inside,
Disclosed is a creeping discharge type ozonizer having a dielectric body made of a porcelain cylinder having a discharge electrode arranged on the inner peripheral surface.

In these creeping discharge type ozonizers, an AC high voltage is applied between the electrodes to cause a creeping discharge on the dielectric surface,
Ozone is generated by this creeping discharge.

[Problems to be Solved by the Invention] A conventional creeping discharge type ozonizer including the ones described above is
The dielectric overheats due to the creeping discharges that occur on its surface,
It has a problem that its durability is deteriorated and ozone generation efficiency is lowered.

Furthermore, in the above-described conventional creeping discharge type ozonizer, the creeping discharge surface is restricted to a dielectric shape made of porcelain formed in a planar shape or a cylindrical surface shape, and the degree of freedom in design is poor, and for example, an air cleaning device for a vehicle. If there are restrictions on the storage space and shape, such as in the above, it is difficult to install. Of course, it is possible to specially make a porcelain dielectric having a creeping discharge surface in a shape matching the storage space, but it is not easy to change the shape of the porcelain dielectric for each vehicle model.

The present invention has been made in view of such problems, and an object thereof is to provide a creeping discharge type ozonizer excellent in durability and installability.

[Means for Solving the Problem] A creeping discharge ozonizer of the present invention includes a mesh electrode portion formed by wiring an induction electrode wire made of a dielectric-coated conductive wire and a discharge electrode wire made of a conductive wire in a mesh shape. , And a frame portion that carries the peripheral edge of the mesh electrode portion.

The induction electrode wire may be formed by coating a conductor formed in a final shape in advance with a dielectric, or may be formed by bending a dielectric-coated conductor wire.

As the dielectric, an inorganic material such as ceramics or glass having excellent heat resistance and electrical insulation, or a resin such as a silicon resin can be used.

In the case of bending the dielectric-coated conductor wire, glass having a relatively low softening point is used as the dielectric material, and after bending the dielectric-coated conductor wire, it is heated to soften the dielectric material and then cooled. It is preferable to prevent cracks from remaining in the dielectric. The induction electrode wire may be resistance-heated to soften the dielectric.

In the case of forming an induction electrode wire by coating a conductor on a conductor formed in a final shape in advance, the conductor is immersed in a dielectric melt having a melting point lower than that of the conductor, and then drawn out. It is preferable to form a dielectric coating and then solidify it by cooling. Further, it is also preferable to improve the heat resistance by solidifying and then reheating to vaporize the low boiling point component.

As the discharge electrode wire, a dielectric covered conductive wire can be adopted instead of the bare conductive wire.

[Operation] When an AC high voltage is applied between the induction electrode wire and the discharge electrode wire, a creeping discharge occurs in the air on and near the surface of the dielectric near the intersection of both lines, and ozone is generated by this creeping discharge. To be done.

Further, since the air flow (including the oxygen-containing gas flow) can smoothly flow through the gap between the mesh-shaped induction electrode wire and the discharge electrode wire, the dielectric is satisfactorily cooled and its overheating is prevented. It

[Embodiment] (Embodiment 1) This creeping discharge type ozonizer shown in FIG. 1 is made of resin and has a square frame portion 1 and a mesh electrode portion 2 stretched in the frame portion 1.
The reticulated electrode part 2 comprises a power source part 3 for applying an alternating high voltage and a protective net 4 (see FIGS. 1 and 2).

The reticulated electrode part 2 is composed of a plurality of induction electrode wires 21 wired in parallel to each other in the left-right direction in the figure and a plurality of discharge electrode wires 22 wired in parallel to each other in the up-down direction in the drawing. twenty two
Are knitted to have a square mesh as shown in FIGS. The discharge electrode 22 is made of titanium wire, and the induction electrode wire 21 is a dielectric (low melting point glass film) 25 having a thickness of about 1 mm.
Is coated with stainless steel 26 (see FIG. 3).
Both ends of each induction electrode wire 21 are connected to one output end of the power source section 3 via a covered electric wire 23, and both ends of each discharge electrode wire 22 are also covered electric wires.
It is connected to the other output terminal of the power supply unit 3 via 24.

The protective net 4 is stretched on the opening surface in the frame of the frame portion 1 in parallel with the mesh electrode portion 2 with the mesh electrode portion 2 interposed therebetween, and prevents the human body from contacting the mesh electrode portion 2. There is.

This creeping discharge type ozonizer is arranged in the middle of the air conditioning duct 5, and when an AC high voltage is applied between the electrode lines 21 and 22 from the power supply section 3, the creeping discharge occurs near the intersection of the electrode lines 21 and 22. Occurs and ozone is generated. The generated ozone is immediately transferred to the target space by the air flow inside the air conditioning duct 4. Furthermore, both electrode wires 21, 22 and especially the induction electrode wire 21
The dielectric 25 is well cooled by this air flow and its overheating is prevented.

According to this embodiment, the shape of the reticulated electrode portion 2 can be appropriately changed according to the application and the installation space, and there is an advantage that the installation property is rich. Further, since both electrode wires 21 and 22 are knitted, durability against vibration due to air flow is enhanced.

(Embodiment 2) As shown in FIGS. 4 and 5, this creeping discharge type ozonizer has a frame portion 6 and a mesh electrode portion 7 stretched in the frame portion 6.
And have.

The frame 6 is made of a resin flat plate having a rectangular opening, and a ceramic small insulator 51 is erected on one surface thereof. Then, the induction electrode wire 71 is arranged so as to meander in the left-right direction between the small insulators 51 arranged in parallel along the left and right opening edges, and similarly, the discharge electrode wire 72 is arranged in parallel along the upper and lower opening edges. The small insulator 51
It is arranged so as to meander in the vertical direction.

By doing so, the mesh electrode portion 7 can be formed by each one of the induction electrode wire 71 and the discharge electrode wire 72, and the structure can be simplified.

(Embodiment 3) As shown in FIG. 6, this creeping discharge type ozonizer has four reticulated electrode parts 2a, 2b, 2c in the frame part 1 in the air flow passage direction.
2d are arranged one after another at small intervals, and by doing so, it is possible to generate a creeping discharge even between adjacent reticulated electrodes and increase the ozone generation amount without obstructing the air flow. it can.

(Example 4) As shown in FIG. 7, this creeping discharge type ozonizer is shown in FIG. 1 using a pair cable in which an induction electrode wire 81 and a discharge electrode wire 82 are arranged adjacent to each other in parallel. The mesh is knitted, and the surface of the discharge electrode wire 82 is covered with the dielectric 87. By doing this, both electrodes
Since the electrostatic capacitance between 81 and 82 can be increased, the amount of ozone generated can be increased by increasing the creeping discharge current.

[Effects of the Invention] In the surface discharge type ozonizer of the present invention, since the induction electrode wire and the discharge electrode wire are formed in a mesh shape, air (or an oxygen-containing gas flow) can smoothly penetrate through the mesh, Cooling of the dielectric by the air flow becomes good, and it is possible to prevent its overheating and improve the durability.

In addition, there is an advantage that the shape of the induction electrode wire and the shape of the discharge electrode wire can be freely changed, and the shape of the mesh electrode portion can be matched to the installation location, and the installation space can be saved.

[Brief description of drawings]

1 is a front view showing an embodiment of the present invention, FIG. 2 is a cross-sectional view thereof, FIG. 3 is an enlarged cross-sectional view of an intersection of both electrodes 21 and 22, and FIG. 4 is a front view showing a second embodiment. Figure, Figure 5 is its side view,
FIG. 6 is a sectional view showing the third embodiment, and FIG. 7 is an enlarged sectional view showing the mesh electrode portion 2 of the fourth embodiment. 1 …… Frame part 2 …… Reticulated electrode part 21 …… Induction electrode wire 22 …… Discharge electrode wire

Claims (1)

[Claims] 1. A reticulated electrode portion formed by arranging an induction electrode wire made of a dielectric-coated conductor wire and a discharge electrode wire made of a conductor wire in a mesh shape, and a frame portion carrying a peripheral edge of the reticulated electrode portion. A creeping discharge type ozonizer that includes