JPH0213092Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field This invention relates to an air purifying device that collects dust, etc. floating in the air.

(b) Prior art Technologies prior to the present invention include Japanese Patent Publication No. 46-599 and Japanese Patent Publication No. 1940-1977. These publications state that in order to improve the dust collection efficiency of the dust collection section, which was formed by sandwiching a dielectric filter between two electrode plates, a dielectric filter was arranged along one electrode plate. An air cleaning device is disclosed in which a discharge wire is disposed opposite to the dielectric filter. In order to further improve the dust collection efficiency, an ionization section is formed as a preceding stage. However, by installing the discharge wire in the dust collection part, it was difficult to maintain a constant distance between the discharge wire and the electrode plate due to the labor and electrical processing, and by forming the ionization part separately, Therefore, as the size increases, the number of high-voltage wiring parts increases and the insulation structure becomes complicated. Additionally, Japanese Patent Publication No. 57-58220 discloses a device in which a counter electrode is formed in order to improve the irradiation efficiency of ions generated by the ionization section, but this requires separate wiring for the current collection section. .

(c) Problems to be solved by the invention This invention solves the shortcomings of the prior art described in the previous section, and provides an air purifying device that has a simplified structure, compactly incorporates an ionization section and a dust collection section, and improves dust collection efficiency. This is what we provide.

(d) Means for solving the problem This proposal includes a breathable electrode plate that forms the wall of the cylinder that closes the back, a counter electrode that is arranged at the back of the cylinder, and a tip that is located near the suction opening surface of the cylinder. a needle-like electrode located;
A dielectric filter is held inside the cylinder along the electrode plate, a high voltage generator applies a high voltage between the electrode plate, the counter electrode and the needle-like electrode, and air is introduced from the suction opening of the cylinder. This problem can also be solved by means equipped with a suction blower.

(E) Effect This method ionizes the air sucked in between the needle electrode and the counter electrode, and the ionization takes place within the electrode plate and is collected by the dielectric filter, so the ionization and dust collection occur in close space. The needle-shaped electrode serves as both the electrode plate and the counter electrode.

(F) Embodiment The present invention will be explained based on the first embodiment shown in FIGS. 1 and 2, the second embodiment shown in FIG. 3, and the third embodiment shown in FIG.

A first example will be explained.

The air purifier 1 has a front intake port 2 and a top exhaust port 3.
a synthetic resin two-part frame body 4 formed with a cylindrical breathable electrode plate 6 whose suction opening 5 matches the intake port 2;
, a dielectric filter 7 that is detachably held along the inner surface of the electrode plate 6, a blower section 8 that is housed in the rear part of the frame 4, and a detachable filter that covers the front air intake port 2 of the frame 4. A suction grille body 9, a needle electrode 10 formed on the inner surface of the grille body 9, and a high voltage generator 1 that applies a high voltage between the electrode plate 6 and the needle electrode 10.
1, and a counter electrode 12 to which the same potential as the electrode plate 6 is applied.

The electrode plate 6 is formed by joining plate bodies having a large number of ventilation holes into a cylindrical shape, and a synthetic resin blocking plate 13 is formed at one end of the opening, and a closing plate 13 made of synthetic resin is formed at the other end of the suction opening 5. A flange portion 14 is formed. The flange 14
is a holding portion 1 formed on the inner edge of the intake port 2 of the frame body 4;
5, and the closing plate 13 is integrally formed within the frame 4. A ventilation passage 16 is formed between the electrode plate 6 and the inner surface of the frame 4 and behind the closing plate 13. The counter electrode 12 is formed at the center of the closing plate 13 facing the intake port 2 . In this embodiment, the counter electrode 12 is
Although it is locked with a locking piece 23 formed in the above, it may be fixed with a screw or the like together with a terminal plate to which the power supply line from the high voltage generating section 11 is connected.

The blowing section 8 includes an electric motor 17 and a blowing blade 18. In this embodiment, a centrifugal fan is used as the blowing blade 18. A fan casing 19 of the blower blade 18 is integrally formed with the frame 4. A blowout grille 20 is formed at the exhaust port 3 which serves as the blowout port of the blower blade 18 .

The needle-like electrode 1 is located at the center of the rear surface of the grill body 9.
It is fixed at 0. Power is supplied to the needle electrode 10 by a contact piece 21 which also serves as a grounding short-circuit piece. By attaching and detaching the grill body 9 to and from the frame body 4, the high voltage is turned on to the needle electrode 10, and the safety switch 22 is also turned on.

A negative terminal of the high voltage generator 11 is connected to the needle electrode 10, and a grounded positive terminal is connected to the electrode plate 6 and the counter electrode 12.

The dielectric filter 7 is molded from a dielectric material such as a synthetic resin fiber body made of polyethylene or polypropylene, or a glass fiber body. By applying a DC high voltage between the electrode plate 6 and the needle-like electrode 10 and between the counter electrode 12 and the needle-like electrode 10, corona discharge is generated. A dielectric filter 7 is provided on the electrode plate 6.
Since the dielectric filter 7 is attached, a certain amount of discharge current flows and ionic charges are deposited on the surface of the dielectric filter 7 facing the needle electrode 10. As ion charges are deposited on the dielectric filter 7, the discharge between the needle electrode 10 and the electrode plate 6 is stopped. This means that when ionic charges are deposited on the surface of the dielectric filter 7, a strong electric field is formed between the surface of the dielectric filter 7 and the electrode plate 6, that is, within the dielectric filter 7, and the acicular electrode 10 This is due to the weakening of the electric field between When dust is collected on the dielectric filter 7, the electric charge on the surface of the filter leaks and decreases. When the electric charge on the surface of the filter decreases, the electric field between the needle electrode 10 and the surface of the dielectric filter 7 becomes stronger, a discharge occurs between the needle electrode 10 and the electrode plate 6, and the surface of the dielectric filter 7 increases again. supply a charge to. This operation is then repeated many times to collect dust.

The discharge between the acicular electrode 10 and the electrode plate 6 repeats stopping and discharging due to the interposition of the dielectric filter 7.
Since there are no inclusions between the electrode 10 and the needle electrode 10,
Discharge occurs continuously without being stopped.
Therefore, the dust particles contained in the air sucked in through the intake port 2 are ionized before reaching the dielectric filter 7, and are easily adsorbed by the dielectric filter 7.

Regarding the explanation of the second embodiment and the third embodiment, since the structure thereof is basically the same as that of the first embodiment, the same component parts will be denoted by the same names and symbols and the explanation will be omitted.

A second example will be explained.

In this embodiment, the electrode plate 6 is formed of a housing so that the counter electrode 12 is integrally formed.
Positioning is performed by a protrusion 25 protruding from 3. By integrally forming the electrode plate 6 and the counter electrode 12, high voltage power supply wiring can be centralized. Although the counter electrode 12 portion is a ventilation member like the electrode plate 6 portion, it may have a non-ventilation structure such as a sheet metal.

The third embodiment is the counter electrode 12 in the first embodiment.
A protrusion 26 is formed by protruding the portion of the closing plate 13 to which the electric motor 17 is attached, toward the intake port 2, and a concave portion inside the protrusion 26 serves as a mounting portion 27 for the electric motor 17. Therefore, by forming a storage space for the electric motor 17 within the electrode plate 6 and the ventilation path 16, the air purifying device 1 can be downsized. Further, the protrusion 26
serves as a guide for the air sucked in from the intake port 2, and is smoothly sent to the dielectric filter 7.

Note that the present invention is not limited to the above-described embodiments, and various shapes and arrangements of the constituent parts can be considered. For example, the electrode plate 6 may be at least a part of the constituent wall of the cylinder,
Various methods are conceivable, such as forming a cylinder within the frame 4 by inserting plate-shaped electrode plates into rail portions formed on the top and bottom or left and right sides of the frame 4.

(g) Effects of the invention This invention forms a counter electrode in the back of the cylinder in which the electrode plate is arranged, and by constantly generating electric discharge between it and the needle-shaped electrode, the suction air can be ionized, and the compact design is possible. The structure also has the effect of improving dust collection efficiency.

[Brief explanation of drawings]

Figure 1 is a cross-sectional view showing the first embodiment of the present invention;
3 is a sectional view of the second embodiment, and FIG. 4 is a sectional view of the third embodiment. 6... Breathable electrode plate, 7... Dielectric filter,
8...Blower section, 10...Acicular electrode, 11...High voltage generation section, 12...Counter electrode.

Claims (1)

[Scope of claims for utility model registration] 1. A breathable electrode plate that becomes the wall of the cylinder that closes the back,
a counter electrode disposed deep in the cylinder; a needle-shaped electrode having a tip located near the suction opening surface of the cylinder;
A dielectric filter is held inside the cylinder along the electrode plate, a high voltage generator applies a high voltage between the electrode plate, the counter electrode and the needle-like electrode, and air is introduced from the suction opening of the cylinder. An air purifying device equipped with a suction blower. 2. The air purifying device according to claim 1, which is formed by integrally forming an electrode plate and a counter electrode. 3. The air purifying device according to claim 2, wherein the electrode plate and the counter electrode are integrally formed in a housing.