JPH1119201A - Ion generating device and usage thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the efficiency of generating minus ions corresponding to the wind speed by arranging a needle-like electrode with the axis parallel to a frame-like plate electrode plate surface, and moving the needle-like electrode in such a manner that the tip crosses a discharging frame part. SOLUTION: A needle-like electrode 11 is arranged parallel to the plate surface of a square frame-like plate electrode 15 having an opening 15c in the central part. The needle-like electrode 11 is fixed to a needle holder 14, high voltage is applied to the electrode, and the electrode is arranged in such a manner as to be turned to the direction of a discharging frame side 15d of the plate electrode 15 and keep a designated height to the plate electrode 15. The screw-in positions of adjust screws 18 of the needle holder 14 to screws 15a of both side frame sides 15e of the plate electrode 15 are changed to set the projection distance Sx from the discharging frame side 15d to the maximum minus ion generating distance to the wind speed. Thus, the maximum minum ion can be generated corresponding to the wind speed efficiently.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ion generator used for an air washer and the like and a method of using the same.

[0002]

2. Description of the Related Art Air cleaners can be roughly classified into an ion type and a filter type. In the ion type, negative ions generated by an ion generator are combined with fine pollutants in the atmosphere, and the pollutants are collected, enlarged, and efficiently collected.
In addition, it improves air quality and contributes to recovery from fatigue and health promotion. However, in general, the air is circulated by using the ion wind instead of forcibly blowing air by a fan, so that immediate effect of air cleaning cannot be expected. Further, if ozone is generated and exceeds an allowable amount, an unpleasant smell of ozone may be generated, or the health of a human body may be adversely affected.

On the other hand, the filter type uses a powerful fan to pass contaminated air through a filter for dust collection and deodorization to purify air, and is excellent in terms of immediate effect.
However, compared with the ion type, it cannot remove fine pollutants and is ineffective for improving air quality.

[0004] Therefore, an air purifier that makes use of the advantages of the ion type and the filter type has been commercialized. An example thereof will be described with reference to FIG. 7 and FIG.
A suction port 1a is provided on the lower right front surface of the housing 1, and a filter 2 for dust collection and deodorization is arranged behind the suction port 1a. A blower 3 is placed after the filter 2, and the air that has flowed out of the filter 2 is guided to a duct 4 and reaches an outlet 1 b at the upper left of the housing 1. An ion generator 5 is installed in front of the outlet 1b. A controller 6 including a high-voltage power supply is housed in the housing 1, and an operation panel 7 is provided at an upper right portion of the housing 1. Contaminated air, as indicated by F _1, by a negative pressure by the blower 3, flows from the suction port 1a to the filter 2, the contaminant is removed. The purified air enters the duct 4 through the blower 3 (F ₂ ), and when passing through the ion generator 5, the air molecules are negatively ionized and flow out of the outlet 1 b (F ₃ ). The negative ions combine with fine contaminants that could not be collected by the filter 2, collect and enlarge the contaminants, and facilitate removal by the filter 2 at the next opportunity. At the same time, improve air quality.

A conventional general ion generator has a positive electrode plate and a negative electrode needle, and the needle electrode is positioned in a direction perpendicular to the plate surface of the plate electrode. Corona discharge is generated in a gap generated between the portion and the plate electrode.

[0006]

Therefore, the amount of generated negative ions is small and the efficiency is low. It is conceivable that a large number of needle electrodes are opposed to the flat electrode, but the apparatus becomes large. Further, when the air purifier is installed at a location where air flows at a high speed, such as a position before the outlet 1b of the air purifier, the generation efficiency is further reduced, and negative ions having the expected concentration are not emitted. That is, when air flows at a wind speed of several m / s or more in the duct 4, the corona discharge path extends, the resistance increases, and the ion generation rate decreases. If the applied high voltage is increased to increase the amount of negative ions, the amount of ozone generated will increase,
It will adversely affect human health.

In view of the problems of the prior art, the present invention efficiently generates negative ions in a compact device and generates the negative ions most efficiently according to the wind speed under a high-speed air flow. It is an object of the present invention to provide an ion generator and a method of using the same.

[0008]

The present invention has the following arrangement to achieve the above object. That is, according to the present invention, a flat electrode and a needle electrode are opposed to each other, and a high voltage is applied to the needle electrode to cause corona discharge between the two electrodes, thereby generating negative ions in an atmosphere between the two electrodes. This is an improvement of the ion generator described above. One of the features is that the plate electrode is formed in a frame shape. Further, the needle-shaped electrode is disposed in such a positional relationship that its axis is substantially parallel to the plate surface of the plate electrode and can intersect the discharge frame of the plate electrode. Then, a movement adjusting means for moving the needle electrode in a direction in which the needle electrode tip crosses the discharge frame is provided.

When a cloth impregnated with fine powder of a natural radioactive mineral is laid in the frame of the plate electrode, the ionization efficiency is improved. As the movement adjusting means, for example, a plurality of pairs of screw holes formed in a frame portion other than the discharge frame portion of the flat plate electrode, a holder for holding the needle-like electrode, and a screw hole for fixing the holder are screwed into the screw hole. And the screws to be inserted. By fixing the screw to an arbitrary screw hole, the needle electrode held by the holder is moved and adjusted with respect to the discharge frame. The plate electrode is formed, for example, in a rectangular frame shape. Of course, other frame shapes may be used. The frames do not need to be continuous, and may have a cut or the like in a part except for the discharge frame part.

In this ion generator, the needle electrode is disposed so that its tip is located on the upstream side of the air, and the maximum negative value is determined according to the wind speed of the air passing between the plate electrode and the needle electrode. The needle electrode is moved and used via a movement adjusting means so that ions are generated in the atmosphere.

[0011]

1 and 2 are a plan view and a side view of an apparatus according to an embodiment of the present invention. In the figure, reference numeral 11 denotes a needle-like electrode to which a high voltage is applied, and reference numeral 15 denotes a pair of flat electrodes. The flat electrode (positive electrode) 15 has an opening 15c at the center.
It is formed in a square frame shape with. On the other hand, the needle electrode 1
Numeral 1 is arranged such that its axis is substantially parallel to the plate surface of the plate electrode 15 and can cross the discharge frame side 15d of the plate electrode 15. Specifically, a needle electrode (negative electrode) 11
Are fixed to an intermediate portion of the needle holder 14 straddling the parallel side edges 15 e of the flat plate electrode 15. The tip 11a of the needle-shaped electrode faces the discharge frame side 15d, and maintains the height of the plate electrode and d. The needle holder 14 has a sleep 17 at both ends thereof, and an adjustment screw 18 is inserted into this sleep.

Screw holes 15a are formed at substantially equal intervals on both side frame sides 15e of the plate electrode 15. This screw hole 15
The needle holder 14 and the needle electrode 11 are positioned and fixed at a predetermined position by screwing the adjustment screw 18 in the sleeve into a. 1 and 2, the tip 11a of the needle electrode 11 is positioned and fixed at a position protruding by Sx from the front edge of the discharge frame side 15d of the flat electrode 15. The distance between Sx is the needle-like electrode tip 11a and the discharge frame side 15d required to generate the maximum negative ion with respect to the wind speed assuming that the air flows from the right to the left in the drawing.
Is determined in advance by actual measurement through experiments. 3 and 4, the needle holder 14 is retracted to the leeward side, and the tip 11a of the needle electrode 11 is located at a position substantially facing the rear edge of the discharge frame side 15d of the flat electrode 15. By selecting the screw hole 15a into which the screw 18 is screwed, the needle electrode 11 moves in a direction crossing the discharge frame side 15d of the flat electrode 15.

A cloth 16 impregnated with fine powder of a natural radioactive mineral is laid on the opening 15c in the frame of the plate electrode 15 so as to cover the opening 15c from below. What are natural radioactive minerals?
Minerals containing natural radioactive rare elements, such as samarskiite, heuergrinite, xenotime, troglocite, and variant zircon. In the drawing, reference numeral 12 denotes a connector piece into which the rear end of the needle electrode is inserted, 13 denotes a lead wire drawn out of the connector piece, and 15b denotes a screw hole for attaching a positive lead wire.

In this apparatus, when the flow of air is relatively small, for example, as shown in FIGS. 3 and 4, the needle electrode 11 is set at a position retracted from the discharge frame side 15d of the flat electrode. At this time, air molecules near the upper surface of the flat plate electrode 15 and the cloth 16 are ionized positively or negatively by radiation emitted from the natural radioactive mineral. When a negative high-voltage potential is applied to the needle electrode 11, the tip 11 a of the needle electrode 11 and the tip 11 a of the needle electrode 11 are first placed at a relatively low potential due to the influence of air ions 19 floating on the upper surface of the flat electrode 15 or the cloth 16. Corona discharge is started between the electrodes 15.
Next, discharge from the entire needle electrode 11 is caused. The electrons emitted from the needle electrode 11 collide with air molecules and generate a large amount of negative ions. This is basically because, in the device of the present invention, the needle-shaped electrode electrodes 11 are not arranged in a direction orthogonal to the plate electrodes as in the conventional case, but are arranged in parallel with the plate electrodes 15. It is related to being. Even when the fabric 16 impregnated with the natural radioactive mineral is not laid, the discharge from the entire needle electrode is performed, but when the fabric 16 is laid, the effect is more remarkable.

FIG. 5 compares the negative ion generation concentrations of the negative ion generator without the fabric impregnated with the natural radioactive mineral and the apparatus according to the present embodiment. As apparent from the figure, to generate the same negative ion concentration, the applied voltage V _A in the case of using the natural radioactive ore can be considerably lower than the voltage V _B when it is not. According to the measurement, the V _B to 5 KV, V _A is 4K
At about V, the same negative ion concentration can be obtained. In addition,
Even if fine contaminants in the air adhere to the fabric 16, the radioactivity effect from the radioactive substance remains unchanged, and the concentration of the generated negative ions does not decrease.

Next, when there is a relatively strong flow of air, the needle electrode 11 is set at the position shown in FIGS.
The air ions move to the left by the air current, and their concentration increases on the outer side of the discharge frame side of the plate electrode 15 (see FIG. 2). Projection dimension Sx at which resistance of corona discharge path becomes small
When the tip 11a of the needle electrode 11 is placed on (see FIG. 1) and a negative potential is applied to the needle electrode 11, corona discharge starts from the tip of the needle electrode 11 even at a relatively low potential.
Discharge occurs over the entire area of the needle electrode 11, and a large amount of negative ions are efficiently generated as a whole.

FIG. 5 shows the relationship between the protrusion dimension Sx and the negative ion concentration using the wind speed as a parameter. When the wind speed is V ₁ , V ₂ , V ₃ (V ₁ <V ₂ <V ₃ ), the protrusion dimensions Sx for obtaining the maximum ion concentration are S ₁ , S ₁ , respectively.
S ₂ and S ₃ are obtained. When the wind speed increases, the amount of air passing through the ion generator 5 increases, so that the ion concentration tends to decrease. When the wind speed is 5 m / s, the maximum negative ion concentration is obtained when the protrusion size Sx is 10 mm, and the negative ion concentration flowing out from the outlet 1b is 10%.
It reaches 6 / cm ³ or more.

In the above embodiment, the adjustment of the protrusion size S is performed by selecting the screw hole 15a. Instead, a long hole is provided in the flat electrode, and a nut (not shown) and an adjustment screw are used. Thus, it can be fixed to the needle holder. The same purpose can be achieved even if the protrusion dimension Sx is determined by changing the length of the needle electrode instead of relocating the needle holder.

The adjustment of the positional relationship between the needle electrode and the plate electrode does not necessarily require that the tip of the needle electrode protrude outside the side of the discharge frame as shown in FIGS. 3 and 4 in accordance with the flow, the position where the most negative ions are generated may be appropriately selected.

[0020]

As described above, according to the present invention, the needle electrode is arranged so that the axis of the needle electrode is substantially parallel to the plate surface of the plate electrode and the discharge frame portion of the plate electrode. Since they are arranged so as to be capable of crossing each other, it is possible to generate a large amount of negative ions while suppressing the generation amount of ozone while being a compact device.

Further, according to the present invention, since there is provided a movement adjusting means for moving the needle electrode in a direction in which the tip of the needle electrode crosses the discharge frame, the needle-shaped electrode is moved in accordance with the flow rate of air. By moving the electrode electrode in parallel with the plate electrode, negative ions can be generated at the most efficient position.

Further, according to the present invention, the ionization of air can be performed more efficiently by laying the impregnated cloth of fine powder of natural radioactive mineral at the opening in the frame of the flat electrode.

[Brief description of the drawings]

FIG. 1 is a plan view of an apparatus according to an embodiment of the present invention.

FIG. 2 is a side view showing a part of FIG. 1 in cross section.

FIG. 3 is a plan view of the device according to the embodiment of FIG. 1 in a state in which the needle electrodes are retracted.

FIG. 4 is a side view showing a part of FIG. 3 in cross section.

FIG. 5 is a graph showing the difference in the amount of generated negative ions when a fabric impregnated with a natural radioactive mineral is laid and when it is not.

FIG. 6 is a graph showing the relationship between the amount of protruding needle-like electrodes from a flat plate electrode and the concentration of generated negative ions in the apparatus of FIG.

FIG. 7 is an explanatory diagram showing a configuration of an air purifier using the apparatus of the present invention.

FIG. 8 is a plan view of FIG. 7;

[Description of symbols in the figure]

DESCRIPTION OF SYMBOLS 1 Air purifier housing 1b Discharge port 5 Ion generator 11 Needle electrode 11a Needle electrode tip 15 Plate electrode 15a Screw hole 15c Opening in plate electrode frame 15d Discharge frame side 18 Adjustment screw

Claims (5)

[Claims] A negative electrode is generated in an atmosphere between both electrodes by causing a flat electrode and a needle electrode to face each other, applying a high voltage to the needle electrode, and causing a corona discharge between the two electrodes. In the ion generator, the flat electrode is formed in a frame shape, and the needle electrode is positioned so that its axis is substantially parallel to the plate surface of the flat electrode and can intersect with the discharge frame portion of the flat electrode. And a movement adjusting means for moving the needle electrode in a direction in which the tip of the needle electrode crosses the discharge frame. 2. The ion generator according to claim 1, wherein a cloth impregnated with fine powder of a natural radioactive mineral is laid in the frame of the plate electrode. 3. The movement adjusting means includes a plurality of pairs of screw holes formed in a frame portion of the flat electrode other than the discharge frame portion, a holder for holding the needle-shaped electrode, and the holder for fixing the holder. A screw which is screwed into a screw hole, and the needle-like electrode held by a holder is moved and adjusted with respect to the discharge frame portion by fixing the screw in an arbitrary screw hole. The ion generator according to claim 2. 4. The ion generator according to claim 1, wherein said plate electrode is formed in a rectangular frame shape, and said discharge frame portion is a discharge frame side. 5. A method for using the ion generator according to claim 1 or 2, wherein the needle-shaped electrode is disposed such that a tip end thereof is located on the upstream side of air. The needle electrode is moved via the movement adjusting means so that the largest negative ion is generated in the atmosphere according to the wind speed of the air passing between the plate electrode and the needle electrode. How to use the ion generator.