JPS60153956A - Ionization apparatus - Google Patents

Abstract

PURPOSE:To enhance ozone removal efficiency by reducing the area of ozone removing activated carbon in a rear part, by arranging an ozone adsorbent or an ozone decomposing catalyst on an ionization electrode or between said ionization electrode and the opposed earth electrode. CONSTITUTION:High voltage is applied not only between ionization electrodes 11, 11'... and opposed earth electrodes 12, 12'... but also between high voltage electrodes 13, 13'... and opposed earth electrodes 12, 12'... and, when a corona current is flowed to the ionization electrodes 11, 11'... and the opposed earth electrodes 12, 12'..., ion wind is generated herein. At this time, air generates dielectric breakdown by the strong electric fields on the surfaces of the ionization electrodes 11, 11'... and a large amount of ozone is generated. In this case, for example, if activated carbons 18, 18'... are wound around the ionization electrodes 11, 11'... or said electrodes 11, 11'... are covered by a catalyst such as platinum, high conc. ozone can be quickly adsorbed and the flow of ozone to air pervious activated carbon 14 in a rear part is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an ionization device used in some parts of air cleaners, copying machines, etc.

Conventional Structure and Problems Conventionally, this type of ionization device generates a lot of ozone, and it has been necessary to use activated carbon for removing ozone to prevent ozone from flowing out of the device. However, since activated carbon removes ozone through catalytic adsorption, it is necessary to increase the catalytic crushing rate by making the vent holes of activated carbon smaller, but this increases ventilation resistance and requires the use of an air blower with a large ventilation capacity. I had to.

A conventional example will be explained below with reference to FIG.

In the figure, (1), (1'), (1') are ionization lines, (2), (2')... are ionization lines (1), (1
')... counter ground electrode, (3), (3... are high voltage electrodes, (4) is breathable activated carbon, (5) is the intake port, (6
) indicates the air outlet, and (7) indicates the body.

Ionization line fl), (1... and the opposing ground electrode (2)
), (... Although not shown in the figure, a high voltage is applied between them and a corona current flows.Also, the opposing ground electrodes +2+, (2')... and the high voltage electrodes [31, (
3. A high voltage is also applied to form a high electric field.

In this configuration, ionization PJ (11, (1...
When a corona current flows between the counter electrodes (2) and ('2'), the ions collide with the air and cause friction, pushing the air away and creating a wind. This is the ionic wind. These ions also charge dust in the air, forming a high electric field between the counter electrode +2+, (2)... and the high voltage electrode (3).
, (3... flows in between. Charged dust receives electrostatic force from the electric field and electrodes +21, (2')...,
+31, (3... are suctioned and collected.

Furthermore, the ozone generated by the corona is removed using breathable activated carbon (4
) and is blown out as clean air from the air outlet (6).

However, since ozone removal from activated carbon (4) is achieved by contact adsorption, the vent holes in activated carbon (4) must be made very small, or the thickness of the activated carbon must be increased to increase the contact time to increase the contact area and retention time. Methods have been used, such as increasing the amount of contact. In either case, this method increases ventilation resistance, and in the case of an ion-blowing type air cleaner, the amount of air blown is particularly reduced, making it unusable. Also, in the case of a blowing method using a motor or a fan, it was necessary to use a high-output motor.

Purpose of the Invention The present invention solves these conventional problems, reduces the amount of ozone generated, reduces the amount of rear activated carbon for ozone removal, and reduces
, it is possible to obtain a practical air volume by reducing power loss, and to reduce air blowing energy.

Structure of the Invention The ionization device of the present invention includes a linear ionization wire, a ground electrode facing the ionization wire, a high voltage electrode disposed between the ground electrodes facing the ionization wire, and breathable activated carbon arranged in series in a body. In an ionization device in which a high voltage is applied between the ionization line and the counter ground electrode to form a high electric field between the counter ground electrode and the high voltage electrode, the area between the top surface including the top surface of the ionization line and the counter ground electrode is provided. It is characterized by disposing an ozone adsorbent or an ozone decomposition catalyst. The surface may be coated with a catalyst such as platinum.

[) Due to the configuration described above, the ozone generating section adsorbs and removes ozone or decomposes ozone on the ionization electrode with the highest ozone concentration, which reduces the amount of activated carbon at the rear, reduces pressure loss, and reduces the amount of blowing force. It can be lowered.

DESCRIPTION OF EMBODIMENTS FIG. 2 is a sectional view of an embodiment of the gas ionization device of the present invention, and FIG. 3 is a positive jf1 of an embodiment of the ionization electrode of the present invention.
Figure 1 is shown.

In the figure, 011, (+f)... are linear ionization electrodes twisted together with linear activated carbon 081 as shown in FIG. 3, (12, (12Q...) are ionization electrodes 4!1
iiQυ, (11')...'s opposing ground electrode, Qals
(13')... is the height 1 upper electrode, 0 is the breathable activated carbon, (15) is the air intake port, Oe is the air blower 1], and Q71 does not show the body. Ionization electrode [10s Ot')..., counter grounding electrode a2, (1z)..., and high voltage electrode exposed, (1
Although not shown, a high voltage is applied between the ionization electrode Ql)% (II')... and the opposing ground electrode (12')... Electrode α21
, (12')... are configured so that a corona current flows through them.

This corona current is generated at the ionization electrode αυ as shown in Figure 6.
, (n')...The air causes dielectric breakdown due to the strong electric field on the surface, becomes ionized, and becomes the ionizing electrode Qll.

(11')... and molecules of different polarity are ionized electrode OL (
11')..., and molecules of the same polarity flow toward the opposing ground electrode +121%° (+2/)..., which is a flow of ions.

In this way, the corona part is in a dielectric breakdown state, and oxygen and
Ozone, which is an unstable and active excited state, is also produced in this region. Ionization electrode 01), (11')・
... is ionization electrode fi1, (one ... and activated carbon Q8
By twisting 1% (1 gi)..., it is possible to quickly adsorb ozone with a high concentration in the generating part, and the flow of ozone to the rear part is reduced. Therefore, the contact area of the air-permeable activated carbon at the rear part can be kept unchanged, and ventilation resistance can be reduced.

In addition, in the example, as shown in FIG. 3, the ionization electrode +11
, (i... and activated carbon (14G, (lllr)...
・As shown in Figures 4 and 5, activated carbon α
A similar effect can be obtained by adhering the adhesive to the surface of the ionizing electrode 01).

Furthermore, similar effects can be obtained by disposing an ozone decomposition-like catalyst on the surface of the ionization electrode. In particular, a tungsten wire is used as an ionization electrode, and there is a commercially available product in which the surface of tungsten is clad with platinum, and it can be easily obtained.

In addition, activated carbon (18), (Igi)... or a catalyst in the seventh
As shown in the figure, the ionization electrode ('11
% (H')... and the opposing ground electrode H, (t'2')
Even if the ozone is placed between the two, the same effect can be obtained since the ozone has not yet diffused and the concentration is high. By placing it in the middle, the gas is not in a corona state, so there is no reactivation of the adsorbed meson, and it can be maintained stably, which is highly effective.

Note that the operation of the air cleaner shown in FIG. 2 is the same as that of the conventional example.

As explained in the various embodiments above, the key is to place activated carbon or an ozone decomposition catalyst between the surface of the ionizing electrode and the opposing ground electrode.

Effects of the Invention As is clear from the embodiments described above, the ionization device of the present invention uses activated carbon for ozone adsorption or an ozone decomposition catalyst to be placed on the surface of the ionization electrode or between the ionization electrode and the opposing ground electrode, thereby reducing the concentration of ozone in areas with high ozone concentration. This makes it possible to carry out the treatment in the air, increasing the ozone removal efficiency, eliminating the need to reduce the contact area of the rear activated carbon, and reducing the energy required for blowing air.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an air cleaner using a conventional ionization unit, FIG. 2 is a sectional view of an air cleaner using an embodiment of the ionization device of the present invention, FIGS. FIG. 5 is an enlarged view of the main part of an embodiment of the ionization electrode of the present invention, and FIG.
FIGS. 4 and 5 show electric field intensity diagrams of the main parts, and FIG. 7 shows a sectional view of an air cleaner using an ionization device according to another embodiment of the present invention. 11, ll'...: Ionization electrode 12,''/...
: Opposing ground electrode 13.13'...: High voltage electrode 14
: Breathable activated carbon 15: Inlet 16: Air outlet 17: Body 18.18'...: Breathable activated carbon Patent applicant Matsushita Electric Industrial Co., Ltd. Representative Patent Attorney Isao Abe Figure 1 Figure 3 Figure 5 Figure 7

Claims (1)

[Scope of Claims] 1. A linear ionization line, an opposing ground electrode of the ionization line, and a high [E
An ionization device in which an electrode and breathable activated carbon are arranged in series in a body, a high voltage is applied between the ionization line and a counter ground electrode, and a high field is formed between the counter ground electrode and the high voltage electrode. An ionization device characterized in that an ozone adsorbent or an ozone decomposition catalyst is disposed between the opposing ground electrodes from the upper surface including the ionization line 1f11. 2.)'1 The ionization device according to claim 1, wherein activated carbon is wound around the ionization electrode as an ozone adsorbent. 31. The ionization device according to item 1, wherein the ionization electrode is coated with activated carbon as an ozone adsorbent. 41) The ionization device according to claim 1, wherein the surface of the electrode is coated with a catalyst such as platinum.