JPS6164356A - Ion wind generation apparatus - Google Patents

Abstract

PURPOSE:To obtain an ion wind generation apparatus made stably operable for a long period of time by extending a washing cycle to a large extent, by arranging a front stage electrode pair forming a high electric field part in the windward of an ionization electrode. CONSTITUTION:Plural sets of flat plate shaped front stage electrode pairs 28, to which high voltage is applied by a high voltage power source 27, are arranged in the windward of an ionization electrode in parallel to a wind direction. By this mechanism coarse dust is collected by the front stage electrode pairs but not collected by the leading end parts of opposed dust collection electrodes and the generation of inverse corona is lowered markedly to reduce the increase of unpleasant sound or ozone and a washing cycle is extended to a large extent.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an ion blower in an ion wind air cleaner or the like used in homes, automobiles, clean rooms, etc.

Conventional configuration and its problems A conventional ion wind air cleaner has a configuration as shown in FIG. 4. That is, in FIG. 4, (1) is an ionization electrode, and (2) is a counter-collecting electrode.

(3) is the acceleration electrode, (4) is the intake port, (5) is the ventilation port,
(6) is the case, (7) (7') is the high voltage power supply, (8
) is activated carbon. Ionization electrode (1) and dust collection electrode (2)
When a high voltage is applied between ), a corona current flows from the ionization electrode ([ ) to the dust collection electrode (2). At this time, the ions collide with air molecules and push the air toward the dust collection electrode (2).

This air flow is called ion wind. The ion wind can be utilized by concentrating the ion wind in a certain direction (A) as shown in FIG. On the other hand, dust in the air is charged by the ion current flowing between the ionization electrode (1) and the dust collection electrode (2). This load? When ILm dust flows between the accelerating electrode (3), where a high electric field is formed, and the dust collection electrode (2), a Coulomb force acts on the dust due to the electric field and the charge on the dust, causing the dust to move toward the dust collection electrode (2). Pushed and collected. The air thus purified is sent out through the air outlet (5). Note that ozone generated around the ionizing electrode (1) is removed and purified by activated carbon (8) in a honeycomb shape or the like.

As can be seen from the principle of this ion wind system, when air resistance increases, the wind stops flowing. For this reason, the prefilter
Therefore, even relatively coarse dust flows into the ion blower. Since coarse dust is easily collected, the ion specific gravity If! of the opposing dust collection electrode (2) is (1) The light is concentrated and collected at the side light end. This coarse dust is relatively often in the form of fibers, and is electrostatically collected from the opposing dust collection electrode (2) in a radial manner, and a reverse corona etc. is generated from the tip, producing unpleasant noise. At the same time, due to the increase in ozone, the dust collection electrode (2) had to be cleaned in a very short period of time, making it difficult to put it into practical use.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned conventional drawbacks, and provides an ion blower that can significantly extend the cleaning cycle and operate stably for a long period of time.

Structure of the Invention ゛In order to achieve the above object, the ion blowing device of the present invention includes an ionization electrode and an opposing collector arranged opposite to the ionization electrode on the leeward side of the ionization electrode. ! 1 electrode, a high-voltage power supply that applies a high voltage between the ionization electrode and the opposing collecting electrode, and at least one pair of front-stage electrodes to which a high voltage is applied upwind of the ionization electrode.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 3. Note that substantially the same members in these figures are given the same reference numerals and redundant explanations will be omitted.

In FIG. 1, (21) is an ionization electrode made of a thin wire of tungsten or the like, and a counter dust collection electrode (22) is provided downstream of and opposite to this ionization electrode (21). An acceleration electrode (23) is arranged between the dust collector ffl (22), and an ionization electrode (21) and a dust collector electrode (22).
2) and between the ionization electrode (22) and the acceleration electrode (23)
A high voltage is applied between them by high voltage power supplies (24) and (25). collection! A honeycomb-shaped activated carbon (26) for ozone removal is arranged downwind of 1uti (zz). Upwind of the ionization electrode (21), a plurality of flat plate-shaped front electrode pairs (28) to which a high voltage is applied by a high voltage power supply (27) are provided in parallel to the wind direction. Ionization electrode (
21), collection m':l! Pole (22), acceleration electrode (23),
Activated carbon (26).

and the front-stage electrode pair (28) are all housed in a case (29), and the case (29) has an air inlet (30) and an air outlet (31).

In the above configuration, when dust flows in from the intake port (30), the dust is polarized by the electric field formed by the front electrode pair (28). Since the larger the size of the dust, the larger the polarization, the attraction force between the electrode pair (28) is large, and the coarse dust is collected on the electrode pair (28). Therefore, only fine dust reaches the ionization electrode (21), and coarse dust does not adhere to the tip of the dust collection electrode (22). In addition, since fine dust is difficult to collect, the dust collection electrode (22
) will no longer be concentrated at the tip of the tube. For this reason, a large amount of dust is collected intensively at the tip of the collecting m electrode (22), and there is almost no radial piling, and the speed is also significantly reduced. Therefore, it is possible to significantly reduce the unpleasant noise caused by reverse corona and the increase in ozone, etc., and
The cleaning cycle can be significantly extended, making it possible to put ion wind generation to practical use.

In another embodiment shown in FIG. 2, instead of the plurality of flat electrode pairs (28) in FIG. 2, a pair of breathable electrodes made of wire mesh or the like is used as the front electrode pair (32). Using.

The electrode pairs (32) extend perpendicularly to the wind direction and are spaced apart from each other in the wind direction.

Such a configuration not only provides the same effect as the one in FIG. 1, but also allows the internal high voltage application section to be removed by locating the ground side electrode of the electrode pair (32) on the intake port (30) side. An additional effect can be obtained in that the danger of electric shock etc. can be prevented.

In a further embodiment shown in FIG. 3, case (26)
a first chamber (34) which communicates with each other through a partition plate (33);
and a second chamber (35), and an intake port (30) communicating with the first chamber (34) on the same side of the case (26).
) and an air outlet (31) communicating with the second chamber (35). Further, in the first chamber (34), a pair of front-stage electrodes (36) similar to those in FIG. 2 are arranged obliquely with respect to the wind direction.

In this way, when the front electrode pair (36) is arranged diagonally, the area through which the wind passes increases, so the relative wind speed decreases.
This has the effect of improving collection efficiency.

In the three embodiments described above, a pair of front-stage electrodes formed of parallel flat plates or a breathable conductor is used, but the point is that a high electric field portion may be formed at the front stage of the ionization electrode.

Furthermore, since almost no current flows through the front electrode pair, it can be used in common as a high-voltage power source for collecting air and for the front electrode pair. Furthermore, if the surface of one or both of the front-stage electrode pair is coated with a special material, there will be no dielectric breakdown between the electrode pair due to dust collection, and the effect of collecting coarse dust can be stably obtained.

Effects of the Invention As is clear from the above explanation, in the ion wind blower of the present invention, a pair of front stage electrodes forming a high electric field portion is disposed upwind of the ionization electrode.

Large dust is collected by the front electrode pair and is no longer collected by the tip of the opposing dust collecting electrode, significantly reducing the occurrence of reverse corona, reducing unpleasant noise and ozone increase, and significantly extending the cleaning cycle. It is something that can be done.

[Brief explanation of the drawing]

Figures 1 to 3 are cross-sectional views of ion wind air cleaners incorporating several ion wind blowers according to different embodiments of the present invention, and Figure 4 is a conventional ion wind air cleaner. FIG. (21)...Ionization electrode, (22)...Counter dust collecting electrode, (24) (25) (27)...High voltage power supply, (28) (32) (36)...Pre-stage electrode substitute People Yoshihiro MorimotoFigure 2Figure 4

Claims (1)

[Scope of Claims] 1. An ionization electrode, a counter dust collection electrode disposed opposite to the ionization electrode on the downwind side thereof, and a high voltage power supply that applies a high voltage between the ionization electrode and the counter dust collection electrode. and at least one pair of front stage electrodes to which a high voltage is applied upwind of the ion electrodes. 2. The ion wind blower according to claim 1, wherein the front electrode pair is a flat plate electrode parallel to the wind direction. 3. The ion wind generator according to claim 1, wherein the front electrode pair is a breathable electrode pair extending in a direction transverse to the wind and spaced apart in the wind direction. 4. The ion wind blower according to claim 3, wherein the front electrode pair extends diagonally with respect to the wind direction. 5. The ion blast device according to claims 1 to 4, wherein one or both surfaces of the front electrode pair are coated with an insulating material.