JP2002198160A - Negative ion generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a negative ion generator that is compact size and has a high performance of generating minus ions. SOLUTION: The negative ion generator comprises a needle-shaped negative electrode 1 and a positive electrode 2 arranged at an interval with the negative electrode 1, and in this negative ion generator, in which by impressing a high voltage between the negative electrode 1 and the positive electrode 2, negative ions are generated between the negative electrode 1 and the positive electrode 2, the positive electrode 2 is made of a conductive polymer that has a resistance value that can suppress electric charge. This negative ion generator can make negative ions generated can be extracted in big volume by lowering the moving speed of minus ions without making its size bulky.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a negative ion generator, and more particularly to a negative ion generator having a positive electrode and a needle-like negative electrode.

[0002]

2. Description of the Related Art As shown in FIG. 8, a positive and negative electrode comprising a plate-like positive electrode and a needle-like negative electrode arranged in a direction perpendicular to the positive electrode and spaced apart from the positive electrode. When a negative voltage of several to several tens of kV is applied to the electrodes to perform a negative corona discharge, negative ions are generated between the electrodes. When air is blown between the positive and negative electrodes in a direction parallel to the direction in which the positive electrode spreads using a blowing means such as a blower fan, the generated negative ions can move in the horizontal direction due to the wind, and the negative ions are moved outside the device. Can be taken out.

It is said that negative ions are effective in reducing stress and recovering from fatigue. Usually, the negative ions are generated using a negative ion generator having positive and negative electrodes to which a high voltage is applied. In addition, since this negative ion generator has an effect of restoring health, it is used by being incorporated in an air conditioner such as an air purifier or an air conditioner.

In order to extract a large amount of negative ions from the negative ion generator, it has been required to reduce the moving speed of the negative ions, preferably to be approximately the same as the blowing speed. That is, if the moving speed of the negative ions is high, the generated negative ions move to the positive electrode and disappear, and it becomes impossible to take out the negative ions. As means for reducing the moving speed of the negative ions, there has been a method of reducing the potential gradient by increasing the distance between the electrodes.

However, when the distance between the electrodes is increased, there is a problem that the size of the negative ion generator is increased. That is, air conditioners such as air purifiers and air conditioners are required to be smaller in size, and the space for disposing a negative ion generator is also limited.
For this reason, miniaturization of the negative ion generator itself has been required, and it has been difficult to increase the distance between the electrodes.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a small-sized negative ion generator having a high negative ion generating performance.

[0007]

Means for Solving the Problems In order to solve the above-mentioned problems, the present inventors have repeatedly studied a method for regulating the moving speed of the generated negative ions, and as a result, the positive electrode has a high resistance. We found that we could solve the problem.

That is, the negative ion generator of the present invention has a needle-like negative electrode, and a positive electrode disposed at a distance from the negative electrode, and applies a high voltage between the negative electrode and the positive electrode. In a negative ion generator for generating a negative ion between a negative electrode and a positive electrode by application, the positive electrode is made of a conductive polymer having a resistance value capable of suppressing charging. The positive electrode has a resistance value of 10 ⁸ to 10 ¹¹ Ω.

In the negative ion generator of the present invention, since the positive electrode has a resistance of 10 ⁸ to 10 ¹¹ Ω, the potential gradient between the positive and negative electrodes is reduced, and the moving speed of the negative ions is reduced. For this reason, the negative ion generator of the present invention can take out a large amount of the generated negative ions without increasing the physical size.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A negative ion generator according to the present invention has a needle-like negative electrode and a positive electrode disposed at a distance from the negative electrode. This is a negative ion generator that generates negative ions between a negative electrode and a positive electrode by applying a voltage.

In the negative ion generator of the present invention, the positive electrode has a resistance value of 10 ⁸ Ω or more. Since the positive electrode has a resistance value of 10 ⁸ Ω or more, the negative ion generator of the present invention can extract a large amount of negative ions without increasing the physical size.

More specifically, when the distance between the electrodes is small,
The negative ions generated between the electrodes move to the positive electrode at high speed and are absorbed, but by having a resistance value of 10 ⁸ Ω or more, only the voltage determined by the discharge current and the resistance value of the positive electrode The potential of the positive electrode decreases, and the electric field intensity between the positive and negative electrodes decreases. The moving speed of the negative ions generated with the decrease in the electric field intensity is reduced. As a result, negative ions generated between the electrodes can be extracted from the negative ion generator.

When the resistance value of the positive electrode is less than 10 ⁸ Ω, the moving speed of the negative ions is so high that a sufficient amount of the negative ions cannot be taken out. Furthermore, if the resistance of the positive electrode is too high, the discharge between the electrodes will be insufficient, so that the positive electrode is preferably less than 10 ¹¹ Ω.

The positive electrode is made of a conductive polymer. By using a conductive polymer, a desired resistance value can be given to the positive electrode. In addition, the conductive polymer is not charged, and is excellent in safety that it does not cause electric shock. further,
The conductive polymer is inexpensive and can form various shapes.

The conductive polymer preferably comprises a filler having conductivity and a resin in which the filler is dispersed. The conductive polymer disperses a conductive filler in order to impart conductivity to a resin having no conductivity. Therefore, the conductive polymer can exhibit conductivity.

Further, the desired conductivity of the conductive polymer can be obtained by adjusting the amount of dispersion of the conductive filler.

For this reason, the conductivity of the filler is preferably high. When the conductivity of the filler is high, the amount of dispersion of the filler can be reduced, and an increase in cost for forming a conductive polymer can be suppressed. Further, an increase in the weight of the conductive polymer in which the filler is dispersed can be suppressed.

The filler is preferably made of metal and / or carbon. Since metals and carbon have high conductivity, it is preferable to use these materials as fillers.

The metal and carbon used as the filler include, for example, aluminum, silver, graphite and the like.

When a metal is used as the filler, it is preferable that the metal filler protrudes from the surface of the positive electrode plate. By the metal filler protruding from the surface,
When used as a positive electrode plate, the electric field strength can be increased. Therefore, negative ions can be generated at a low voltage.

[0021] In the conductive polymer, the resin in which the filler is dispersed is not particularly limited. That is, as long as the resin can disperse the filler, the resin is not limited to a thermoplastic resin, a thermosetting resin, or the like. Examples of this resin include resins such as polypropylene, acrylic resin, and vinyl chloride resin.

It is preferable that the positive electrode is an electrode plate having a plane extending in a direction perpendicular to a direction in which the negative electrode extends. Since the positive electrode is formed of an electrode plate having a flat surface, a corona discharge is generated between the positive and negative electrodes, so that a negative ion wind is generated from the negative electrode to the positive electrode.

It is preferable that the electrode plate has a through-hole through which the negative ions pass. That is, the opening of the through-hole allows the above-mentioned negative ion wind to pass through the through-hole, so that a blowing means for extracting the negative ions is not required. Here, the shape of the through hole is not particularly limited, and examples thereof include a circle, a square, a mesh, and a slit.

It is preferable that the positive electrode has a curved surface that is curved so that the surface facing the negative electrode is equidistant from the tip of the negative electrode. Since the positive electrode forms the curved surface, the negative ion wind radiating radially from the tip of the wind electrode blows uniformly.

The curved surface preferably has a surface that defines a hemisphere centered on the tip of the negative electrode. That is,
By being formed in a hemispherical shape, negative ions can be uniformly generated in all directions.

It is preferable that the curved surface has a through hole through which negative ions pass. That is, since the through-hole is opened in the curved surface, the above-mentioned negative ion wind can pass through the through-hole, and the blowing means for extracting the negative ions becomes unnecessary. Here, the shape of the through hole is
The shape is not particularly limited, and examples thereof include a circle, a square, a mesh, and a slit.

It is preferable that the surface of the positive electrode not facing the negative electrode forms a part of the outer periphery of the negative ion generator. Since the positive electrode forms a part of the outer periphery of the negative ion generator, the number of parts required for the negative ion generator can be reduced, and the cost can be reduced. Further, since the positive electrode does not generate any charge, touching the positive electrode does not cause any electric shock. Therefore, sufficient safety is ensured even when exposed on the outer peripheral surface.

The negative electrode preferably has a disk-shaped flange at the base end, which extends in a direction perpendicular to the direction in which the negative electrode extends and whose peripheral edge is smooth. By having the flange portion, the negative ion wind generated from the distal end of the negative electrode can be prevented from spreading toward the base end of the negative electrode, and the direction in which the negative ions are emitted can be determined.

Further, since the flange portion is formed in a disk shape with a smooth peripheral edge, the occurrence of spark from the peripheral edge is prevented.

Since the flange portion is formed at the base end of the negative electrode, the above-described effect is exhibited, and the flange portion may be integral with or separate from the negative electrode.

The negative ion generator according to the present invention comprises a needle-like negative electrode, a positive electrode spaced from the negative electrode,
It is a negative ion generator that generates a negative ion between the negative electrode and the positive electrode by applying a high voltage between the negative electrode and the positive electrode, other than the positive electrode is not particularly limited The members used in the conventional negative ion generator can be used.

That is, the same members as those of a conventional negative ion generator can be used for a high voltage power supply for applying a high voltage to the positive electrode and the negative electrode, a case, and the like.

In the negative ion generator of the present invention, since the positive electrode has a resistance value of 10 ⁸ to 10 ¹¹ Ω, the potential gradient between the positive and negative electrodes is reduced, and the moving speed of the negative ions is reduced. For this reason, the negative ion generator of the present invention can take out a large amount of the generated negative ions without increasing the physical size.

[0034]

The present invention will be described below with reference to examples.

As an embodiment of the present invention, a negative ion generator was prepared.

(Embodiment) The negative ion generator of the embodiment includes a negative electrode 1 having a needle-like portion 12 and a positive electrode 2 made of a conductive plastic disposed at an interval from the tip of the needle-like portion 12. A negative high-voltage power supply 3 for applying a negative high voltage to the positive and negative electrodes 1 and 2, a power switch 4 for regulating the operation of the negative high-voltage power supply 3, and an LED 5 for displaying the operation of the power supply;
A spacer 6 for fixing the negative electrode plate 1, a case 7 made of plastic for accommodating the positive electrode plate 2 in a state in which the positive electrode plate 2 forms a part of the outer peripheral surface, and a conductive wire (not shown) Zu). FIG. 1 shows the configuration of the negative ion generator of the embodiment. FIG.
Is shown with the top and side surfaces open so that the internal configuration can be seen.

As shown in FIG. 2, the negative electrode 1 has a substantially elliptical main body 11, a needle-like portion 12 protruding from the main body 11, and a penetrating opening opened through the main body 11. Hole 1
3 and was formed of a 0.1 mm thick stainless steel plate.

As shown in FIG. 3, the positive electrode plate 2 is made of a conductive plastic plate having a length of 50 mm, a width of 100 mm, and a thickness of 1 mm. 23 air blow ports 21 were formed to penetrate.

The negative high voltage power supply 3 comprises a negative electrode 1 and a positive electrode plate 2
A high voltage of −3 kV is applied between the negative electrode 1 and the positive electrode plate 2 to generate a corona discharge.

The power supplied from the DC connector (not shown) is supplied to the negative high voltage power supply 3. Here, the DC connector is connected to an external 12V power supply (not shown).

The power switch 4 is provided between the DC connector and the negative high voltage power supply 3 and controls the power supplied to the negative high voltage power supply 3.

The LED 5 is a light emitting diode which is provided between the DC connector and the negative high voltage power supply 3 and is turned on when power is supplied to the negative high voltage power supply 3 and turned off when the supply is cut off.

The case 7 has a box shape having an outer peripheral surface formed of plastic having a thickness of 1 mm.

The spacer 6 is held at a predetermined position in the case 7 at a position where the tip of the needle-like portion 12 of the negative electrode 1 is at a distance of 18 mm from the positive electrode plate 2 and at a height of 20 mm from the bottom surface. It is a member that does. The spacer 6 has a columnar shape made of Duracon, and has a threaded hole in an end face on the upper surface.

The fixing of the negative electrode 1 to the spacer 6 was performed by screwing a bolt into a screw hole while passing through the through hole 13 of the negative electrode 1.

FIG. 4 shows the configuration of the electric circuit of the negative ion generator of the embodiment.

(Operation Method) The negative ion generator of the embodiment can be operated by the following method.

When the power switch 4 is turned on, the negative ion generator of this embodiment is externally connected to the negative high-voltage power supply 3.
, And the LED 5 is turned on. The negative high-voltage power supply 3 to which power has been supplied has a voltage of -3 k
V, a potential serving as a ground potential is applied to the positive electrode plate 2 to generate a corona silent discharge between the negative electrode 1 and the positive electrode plate 2 to generate a negative ion wind including negative ions.

In the negative ion generator of the embodiment, a negative ion wind blows from the negative electrode 1 to the positive electrode plate 2. This negative ion wind blows out of the negative ion generator by passing through the air blowing port 21 of the positive electrode plate 2.

Comparative Example A comparative example is a negative ion generator similar to the embodiment except that the positive electrode plate 2 is made of aluminum.

(Evaluation) As an evaluation of the negative ion generator of the embodiment, the amount of negative ions generated by the negative ion generator was measured. Specifically, the evaluation was performed by measuring the number of generated negative ions using an ion counter KST-900 manufactured by Kobe Electric Wave Co., Ltd.

For the measurement of the number of negative ions, first, a negative ion generator and an ion number measuring instrument were placed on different mounting tables in a laboratory in a stable space without airflow. The mounting table is provided with a negative ion generator and an ion number measuring device, and is provided with a blowing port 21 of the negative ion generator.
And the input port of the ion counter were kept at the same height. Here, by disposing the negative ion generator and the ion number measuring device on different mounting tables, the negative ions blown out from the air outlet 21 are not guided to the ion number measuring device along the floor surface.

With the negative ion generator and the ion number measuring device arranged, the ion number measuring device is operated, and then the power switch 4 of the negative ion generator is operated to blow out the negative ions from the blowing port 21. . In this state, the number of ions was measured for 5 minutes, and the average value for 5 minutes was taken as the measurement result. The number of ions was measured by changing the distance (L) between the ion number measuring device and the negative ion generator. The measurement results are shown in FIG. Before the operation of the negative ion generator, the atmosphere in the laboratory had 337 negative ions at a density of 337 ions / cm ³ .

As shown in FIG. 5, the number of negative ions measured in the negative ion generator of the embodiment was about two digits larger than that of the negative ion generator of the comparative example. For this reason, the negative ion generator of the embodiment has significantly improved performance of generating negative ions.

Further, in the negative ion generator of the embodiment, since the positive electrode plate 2 is made of conductive plastic, the positive electrode plate 2 is not charged after the operation of the ion generator, and the electric shock is generated even if touched by hand. Is gone. Further, since the hole of the air outlet 21 opened in the positive electrode plate 2 has a small diameter of 4.5 mm, the fingertip cannot be inserted into the air outlet 21, and the needle-like portion of the negative electrode does not stick with the finger. .
Furthermore, since the negative ions generated between the electrodes 1 and 2 are blown out by the ion wind, there is no need for a blowing means such as a blowing fan, which not only reduces the cost by simplifying the configuration but also reduces the quietness during operation. Will be kept. For this reason, the negative ion generator of the embodiment not only has high ion generation performance but also is a safe ion generator.

(First Modification) As a first modification of the negative ion generator of the embodiment, the negative ion generator shown in FIG. 6 was prepared. The negative ion generator of the first modification is a negative ion generator formed in a substantially cylindrical shape. Note that this modification is a modification of the example, and the members used for the negative ion generator of the example are used unless otherwise specified.

As shown in FIG. 6, the negative ion generator according to the first modification forms a substantially cylindrical outer peripheral shape with the positive electrode 2 ′ and the case 7 ′, and has the negative electrode 1 ′ and the negative high-voltage power supply 3 inside. It is a minus ion generator with 'etc. arranged.

One end of the positive electrode 2 ′ is perpendicular to the axis.
It has a cylindrical shape with a bottom closed by 3 ', and an air outlet 21' is open on the end face 23 '. A screw 25 'is formed on the inner peripheral surface of the cylindrical open end.

The case 7 'is formed in a substantially cylindrical outer peripheral shape in which at least one end is closed. A screw 7 screwed with the screw 25 'is provided on the outer peripheral surface of the one end.
6 'is formed.

The positive electrode 2 'is fixed to one end of the case 7' by screwing a screw 25 'and a screw 76'.

Further, the case 7 'has an end surface at one end having an end surface 75' perpendicular to the axis, and this end surface 75 'is connected to the negative electrode 1 with the needle-like portion 12' protruding from the axis. Having '. The screw 76 'has a conductor electrically connected to the positive electrode of the negative high-voltage power supply. This conductor is connected to the negative high voltage power supply and the positive electrode 2 ′ by screwing the screw 76 ′ and the screw 25 ′.
And are electrically connected.

(Second Modification) The second modification is the same as the negative ion generator of the first modification except that it has a negative electrode 1 ″ and a positive electrode 2 ″. FIG. 7 shows the negative ion generator of this embodiment.

More specifically, the negative electrode 1 ″ is connected to the case 7 ″
When the needle-shaped portion 12 '' is arranged so as to protrude from the end surface 75 '', the peripheral portion extending in a direction parallel to the end surface 75 '' has a disk-shaped flange portion 14 '' formed smoothly. .

The positive electrode 2 ″ has a cylindrical shape with one bottom closed at one end by a hemispherical end surface 23 ″, and a blow port 21 ″ is opened at the closed end surface 23 ″. ing.
The inner peripheral surface on the side of the cylindrical open end has a thread.

The end surface 23 ″ formed in a hemispherical shape is a spherical surface centered on the tip of the needle-like portion of the negative electrode.
The inner peripheral surface of 3 ″ is also formed in a shape along the spherical surface centered on the tip of the needle-like portion.

In the second modification, the positive electrode 2 ″ is formed in a hemispherical shape, so that the generated ion wind is
Because they are emitted from the surface without interfering with each other,
A large amount of negative ions can be released.

Further, in the negative ion generator of this modification, a part of the ion wind generated from the tip of the needle-shaped portion 12 'adheres to the end face 75' and the case 7 'and tends to be charged. The potential portion changes due to the flange portion 14 ″, so that it is difficult for negative ions to reach the case 7 ′ side. For this reason, the case 8 'is less likely to be charged,
Safety is maintained.

In addition, a dry battery can be used as a power source. The negative ion generator incorporating the dry battery can be used as a small desktop type.

Further, by using a battery as a power source, the battery can be used in a vehicle such as an automobile, and the interior of the vehicle can be filled with negative ions.

[0070]

According to the negative ion generator of the present invention, since the positive electrode is made of a conductive polymer, the potential gradient between the positive and negative electrodes is reduced, and the moving speed of the negative ions is reduced. For this reason, the negative ion generator of the present invention can take out a large amount of the generated negative ions without increasing the physical size.

[Brief description of the drawings]

FIG. 1 is a diagram showing a negative ion generator of an embodiment.

FIG. 2 is a diagram showing a negative electrode of the negative ion generator of the embodiment.

FIG. 3 is a view showing a positive electrode plate of the negative ion generator of the embodiment.

FIG. 4 is a diagram showing an electric circuit of the negative ion generator of the embodiment.

FIG. 5 is a diagram showing measurement results of the number of negative ions.

FIG. 6 is a diagram showing a negative ion generator according to a first modification;

FIG. 7 is a diagram showing a negative ion generator according to a second modification.

FIG. 8 is a diagram showing a negative ion generator.

[Explanation of symbols]

 1, 1 ', 1 "... Negative electrode 2, 2', 2" ... Positive electrode 3 ... Negative high voltage power supply 4 ... Power switch 5 ... LED 6 ... Spacer 7, 7 ', 7 "... Case

Claims (9)

[Claims] 1. A negative electrode having a needle-like negative electrode and a positive electrode disposed at a distance from the negative electrode, wherein a high voltage is applied between the negative electrode and the positive electrode. A negative ion generator for generating negative ions between the positive electrode and the positive electrode, wherein the positive electrode is made of a conductive polymer having a resistance value capable of suppressing charging. 2. The negative ion generator according to claim 1, wherein the positive electrode has a resistance value of 10 ⁸ to 10 ¹¹ Ω. 3. The negative ion generator according to claim 1, wherein the positive electrode is an electrode plate having a flat surface extending in a direction perpendicular to a direction in which the negative electrode extends. 4. The negative ion generator according to claim 3, wherein the electrode plate has a through hole through which the negative ions pass. 5. The negative ion generator according to claim 1, wherein the positive electrode has a curved surface that is curved so that a surface facing the negative electrode is equidistant from a tip of the negative electrode. 6. The negative ion generator according to claim 5, wherein said curved surface has a surface defining a hemisphere centered on a tip of said negative electrode. 7. The negative ion generator according to claim 5, wherein the curved surface has a through hole through which the negative ions pass. 8. The negative ion generator according to claim 2, wherein a surface of the positive electrode that does not face the negative electrode forms a part of an outer periphery of the negative ion generator. 9. The negative ion generator according to claim 1, wherein the negative electrode has a disk-shaped flange portion which extends in a direction perpendicular to the extending direction of the negative electrode and has a smooth peripheral portion at a base end portion.