JP2003203745A - Ion generating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ion generating device capable of emitting positive and negative air ions in good balance toward an electrostatic charging body. <P>SOLUTION: The ion generating device is equipped with a needle-shaped electrode 4 connected with an AC high-frequency, high-voltage power supply 2 and a counter-electrode 5 installed confronting the needle-shaped electrode 4 and connected with a grounding circuit 11. An ion accumulating member 6 insulated from the grounding circuit 11 is installed between the needle-shaped electrode 4 and the counter-electrode 5. The ion accumulating member 6 consists of a conductor 12 provided with an insulating covering 13 and is insulated in DC terms from the grounding circuit 11. The power supply 2 is composed of an oscillator circuit 14 to generate an AC high-frequency voltage when a DC voltage is impressed and a piezoelectric transformer 15 to boost the AC high-frequency voltage using a piezoelectric element 15. The counter-electrode 5 is connected with the grounding circuit 11 through an electric resistance 20. A casing 31 where the ion accumulating member 6 is mounted and a fan 35 to convey the air ions are installed between the needle-shaped electrode 4 and the counter-electrode 5 which are arranged confronting. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ion generator for generating positively or negatively charged air ions.

[0002]

2. Description of the Related Art Conventionally, ions that generate positively or negatively charged air ions and discharge the air ions toward the charged body in order to neutralize and eliminate static electricity accumulated in the charged body. Generators are known.

This type of ion generator is provided with a needle-shaped electrode connected to a high-voltage power source and facing the needle-shaped electrode,
And a counter electrode connected to the ground circuit of the high-voltage power supply. In the ion generator, a high voltage is applied to the needle-shaped electrode by the high-voltage power source to generate corona discharge between the needle-shaped electrode and the counter electrode to generate positively or negatively charged air ions. To generate.

In the ion generator, when a positive voltage is applied to the needle-shaped electrode, negative air ions (hereinafter sometimes abbreviated as negative ions) among the generated positive and negative air ions are generated. The positive air ions (hereinafter, sometimes abbreviated as positive ions) move toward the needle electrode, and move toward the counter electrode connected to the ground circuit.
Here, most of the positive ions are trapped by the counter electrode, but some of the positive ions are released to the outside through the counter electrode.

When a negative voltage is applied to the needle-shaped electrode, a phenomenon opposite to that when a positive voltage is applied occurs, and most of the generated negative and positive air ions are negative ions. The negative ions are trapped by the counter electrode and part of the negative ions are emitted to the outside through the counter electrode. As a result, it is possible to neutralize and eliminate the static electricity accumulated in the charged body by the positive or negative air ions released to the outside beyond the counter electrode.

The high-voltage power supply may be either direct current or alternating current. When using direct current, a needle electrode for the positive electrode and a needle electrode for the negative electrode are separately provided and each of them operates. Therefore, the device configuration becomes complicated. On the other hand, in the case of using an alternating current, the needle electrode can be used as a single electrode and positive and negative voltages can be alternately applied to the single needle electrode, and in order to balance positive and negative ions. It is advantageous.

Therefore, when an alternating current is used for the high-voltage power supply, positive ions are emitted when a positive voltage is applied to the needle electrode, and negative ions are emitted when a negative voltage is applied to alternate positive and negative ions. When the charged body is positively or negatively charged, the charge can be neutralized and the charge can be properly removed. However, the AC high-voltage power source has a problem that the device is large and heavy.
In order to solve the above-mentioned problem, it is possible to use a high-frequency oscillation step-up transformer type power supply whose size and weight are equivalent to those of a DC high-voltage power supply device.

However, when a high frequency high voltage is used as the AC voltage, the corona discharge is not continuously and stably generated, the balance of the positive and negative ions generated is lost, and the balance of the positive and negative ions emitted along with this is lost. Since it also collapses, there is a disadvantage that not only the charge of the charged body cannot be satisfactorily removed, but also the charge may be promoted.

[0009]

SUMMARY OF THE INVENTION It is an object of the present invention to provide an ion generator capable of eliminating such inconvenience and discharging positive and negative air ions toward a charged body in a well-balanced manner.

[0010]

The present inventors have made various studies in order to solve the inconvenience in the case of using a high frequency high voltage as the AC voltage. As a result, in the conventional ion generator, by arranging an ion storage member insulated from the ground circuit between the needle-shaped electrode and the counter electrode connected to the ground circuit, positive and negative air is generated. It has been found that ions can be released toward the charged body in a well-balanced manner.

The ion generator of the present invention is based on the above findings, and in order to achieve the above object, an AC high frequency high voltage power supply and at least one needle-shaped electrode connected to the AC high frequency high voltage power supply. An ion generating device that is provided so as to face the needle-shaped electrode and is connected to a ground circuit of the AC high-frequency high-voltage power supply, and at least one counter electrode that generates corona discharge between the needle-shaped electrode and the needle-shaped electrode. Further, at least one ion accumulating member for accumulating positive or negative air ions generated by the corona discharge is provided between the needle electrode and the counter electrode, and the ion accumulating member is the AC high frequency high voltage. It is characterized by being insulated from the ground circuit of the power supply.

According to the ion generator of the present invention, first,
When a positive voltage is applied to the needle-shaped electrode by the AC high-frequency high-voltage power source, most of the positive ions generated are provided between the needle-shaped electrode and the counter electrode, and an ion storage member, It is captured by the counter electrode and a part thereof is emitted to the outside beyond the counter electrode.

Next, when a negative voltage is applied to the needle-shaped electrode by the AC high-frequency and high-voltage power source, most of the generated negative ions are captured by the ion storage member and the counter electrode, The part is emitted to the outside beyond the counter electrode.

At this time, since the counter electrode is connected to the ground circuit, the potential remains zero regardless of whether positive or negative ions are trapped. However, the ion storage member is, for example, the first trapped ion. If is a positive ion, it is positively charged according to the amount of the positive ion, and then the negative ion is captured, so that the positive ion captured earlier is canceled by an amount equal to the amount of the negative ion. Therefore, when the positive and negative ions to be generated are well balanced, the charge of the ion storage member is neutralized every time the positive and negative ions are alternately captured.

On the other hand, when the balance of the positive and negative ions to be generated is disturbed and the amount of one ion to be generated is larger than the other, the more ion is generated even when the ion accumulating member captures another ion. Ions which have not been completely neutralized by other ions and whose amount is increased will remain in the ion storage member. Then, when ions having a larger production amount than the others are produced, the ions are repelled by the ions remaining in the ion storage member, the movement toward the counter electrode is suppressed, and the ions are directed toward the charged body. The amount released is reduced. As a result, the amount of ions emitted toward the charged body in a larger amount than the others is approximately equal to the amount of ions in the smaller amount.

Therefore, according to the ion generator of the present invention, when a high-frequency AC high voltage is used, even if the balance of positive and negative ions generated is lost, the positive and negative air ions are balanced toward the charged body. Can be released.

The ion accumulating member may be any one capable of capturing and accumulating air ions generated by the corona discharge, and may be a conductor or an insulator. It is preferably galvanically isolated from the ground circuit of the AC high frequency high voltage power supply. The electric conductor coated with the insulating coating can act as a local capacitor and accumulate charges, so that when the balance of the positive and negative ions to be generated is disturbed, the amount of the generated one increases. It is possible to reliably suppress the movement of ions in the direction of the counter electrode.

As a result, the ion generator of the present invention can obtain the effect of releasing positive and negative air ions toward the charged body in a better balance.

In the ion generator of the present invention, the AC high-frequency high-voltage power supply generates an AC high-frequency voltage by applying a DC voltage, and the generated AC high-frequency voltage is boosted by a piezoelectric element to increase the voltage. By being composed of a piezoelectric transformer that obtains a voltage, it is possible to reduce the size and weight of the entire device.

Further, in the ion generator of the present invention, the counter electrode is connected to the ground circuit of the AC high-frequency high-voltage power supply via an electric resistance, so that the discharge current flowing into the counter electrode is detected. It can be used as a standard that corona discharge is occurring normally.

In the ion generator of the present invention, the needle-shaped electrode and the counter electrode are arranged to face each other, and the ion storage member is arranged between the needle-shaped electrode and the counter electrode. And a fan that is provided in the housing and that transports positive or negative air ions generated by the corona discharge. Since the ion generator of the present invention includes the fan, it can transfer positive or negative air ions generated by the corona discharge toward the charged body, and act as a static eliminator for the charged body. You can

In the ion generator of the present invention,
It is preferable that the ion storage member is provided on a straight line connecting the needle electrode and the counter electrode so as to shield the needle electrode when the needle electrode is desired from the counter electrode. . Since the ion storage member is provided as described above, it is possible to satisfactorily capture the positive or negative air ions, and when the balance of the positive and negative ions to be generated is lost, the amount of generation is reduced. It is possible to more reliably suppress the movement of the increased number of ions toward the counter electrode.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION Next, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. 1 is a front view showing a part of the ion generator of the first embodiment of the present invention with a part cut away, FIG. 2 is a sectional view taken along the line II-II of FIG. 1, and FIG. 3 is a view of the ion generator of FIG. Circuit diagrams, FIGS. 4 to 6 are circuit diagrams of other aspects of the ion generator shown in FIG. 1, and FIG. 7 is an explanatory cross-sectional view of the ion generator of the second embodiment of the present invention.

Next, a first embodiment of the present invention will be described.

As shown in FIGS. 1 and 2, the ion generator (ionizer) 1a of this embodiment has a plurality of AC high frequency high voltage power supplies 2 and a plurality of AC high frequency high voltage power supplies 2 connected via a high voltage cable 3. The needle-shaped electrode 4 and the counter electrode 5 provided so as to face the needle-shaped electrode 4 are provided.
An ion storage member 6 is provided between the counter electrode 5 and the counter electrode 5.

The needle-shaped electrodes 4 penetrate through the insulating support member 8 sandwiched between the flange members 7, 7 made of an insulating material, project to the outside, and are arranged linearly. In addition, the needle-shaped electrode 4
Are connected to the high-voltage cable 3 via a core material 9 made of a conductive material provided inside the support member 8.

The counter electrode 5 is made of a rod-shaped conductor, is sandwiched between the flange members 7, 7, and is provided in parallel with a plurality of linear needle electrodes 4. Counter electrode 5
Through the connecting member 10 penetrating the flange member 7,
It is connected to the ground circuit 11 of the AC high-frequency high-voltage power supply 2.

Two ion storage members 6 are sandwiched between the flange members 7 and 7 inside the counter electrodes 5 and 5, and two ion storage members 6 are provided in parallel with the plurality of linear needle electrodes 4.
The ion storage member 6 is located on a straight line connecting the needle electrode 4 and the counter electrode 5 and has a width larger than that of the counter electrode 5. Therefore, when the needle electrode 4 is desired from the counter electrode 5, The electrode 4 is hidden behind the ion storage member 6 and is shielded by the ion storage member 6.

The ion storage member 6 has a conductor 12 covered with an insulating coating 13 and is galvanically isolated from the ground circuit 11 of the AC high frequency high voltage power supply 2. The insulating coating 13 may be formed by attaching an insulating material to the conductor 12, or may be applied with a thicker insulating coating.

On the other hand, as shown in FIG. 3, the AC high-frequency high-voltage power supply 2 includes an oscillator circuit 14 for generating an AC high-frequency voltage by applying a DC voltage, and a piezoelectric element 15 made of piezoelectric ceramics for the generated AC high-frequency voltage. And a piezoelectric transformer 16 for boosting the voltage to obtain a high voltage. The oscillator circuit 14 is connected to a commercial power supply 18 via a DC power supply circuit 17. The piezoelectric transformer 16 receives the output of the oscillation circuit 14 and mechanically vibrates the piezoelectric element 15 to generate a high frequency high voltage, which is output from the terminal 19 to the high voltage cable 3.

Next, the operation of the ion generator 1a will be described.

In the ion generator 1a, when an AC high voltage is applied to the needle electrode 4 from the AC high frequency power source 2 via the high voltage cable 3, a high electric field is generated in the air between the needle electrode 4 and the counter electrode 5. It is formed. As a result, corona discharge is generated in the vicinity of the tip of the needle electrode 4, and the corona discharge generates approximately equal amounts of positive ions and negative ions.

According to the AC high frequency power supply 2, positive and negative voltages are alternately applied to the needle electrodes 4. First, AC high frequency power supply 2
Thus, when a positive voltage is applied to the needle-shaped electrode 4, positive ions and negative ions are generated in the air between the needle-shaped electrode 4 and the counter electrode 5 as described above. Among the above ions, negative ions move toward the needle electrode 4 and positive ions move toward the counter electrode 5. Then, the positive ions are an ion storage member 6 provided between the needle electrode 4 and the counter electrode 5,
Most of it is captured by the counter electrode 5 and part of it is charged by the charged body A.
Is released toward. At this time, since the counter electrode 5 is connected to the ground circuit 11 of the AC high-frequency high-voltage power supply 2, the potential is kept at zero regardless of the amount of captured positive ions.
The ion storage member 6 is the ground circuit 1 of the AC high frequency high voltage power supply 2.
Being insulated against 1, it is positively charged according to the amount of trapped positive ions.

Next, when a negative voltage is applied to the needle-shaped electrode 4 by the AC high frequency power source 2, a phenomenon completely opposite to that when the positive voltage is applied occurs, and among the generated ions,
Positive ions go to the needle-shaped electrode 4, and negative ions go to the counter electrode 5.
Move towards. Then, most of the negative ions are captured by the ion storage member 6 and the counter electrode 5, and a part of them is discharged toward the charged body A. At this time, since the counter electrode 5 is connected to the ground circuit 11, the potential is kept at zero regardless of the amount of the captured negative ions. On the other hand, the ion storage member 6 is insulated from the ground circuit 11 of the AC high-frequency high-voltage power supply 2, and is positively charged by the positive ions captured when a positive voltage is applied to the needle electrode 4, The amount of positive ions equal to the amount of newly captured negative ions is canceled by the negative ions.

Therefore, when the corona discharge is stably generated, the positive or negative ions are substantially equal in amount depending on whether the voltage applied to the needle electrode 4 is positive or negative. The charge is discharged toward the charged body A one by one, and the charge can be satisfactorily removed regardless of whether the charged body A is positively or negatively charged.

By the way, when the generation of the corona discharge becomes unstable and the generated positive and negative ions are out of balance,
If the ion storage member 6 is not provided, the positive and negative ions are discharged toward the charged body A while the balance is lost. In other words, among the positive and negative ions, a larger amount of generated ions will be released, which may not only result in poor charge removal of the charged body A, but may also promote charging of the charged body A.

However, the ion generator 1a of this embodiment is
Since the ion storage member 6 is provided, the ion storage member 6 has a self-control function of ion balance. Next, the self-control function will be described.

As described above, the ion storage member 6 traps positive ions when a positive voltage is applied to the needle electrode 4 and traps negative ions when a negative voltage is applied.
Therefore, when the positive and negative ions are generated in approximately equal amounts, the charge of the ion storage member 6 is neutralized every time the positive and negative ions are alternately captured.

On the other hand, when the balance of the generated ions is lost, the amount of positive or negative ions, for example, positive ions, becomes larger than the amount of negative ions. In this case, in the ion storage member 6, the positive charges due to the positive ions captured when the positive voltage is applied to the needle-shaped electrode 4 are completely neutralized by the negative ions captured when the negative voltage is applied. However, the positive charge remains. Therefore, next, the needle electrode 4
When a positive voltage is applied to the self-control function,
A part of the positive ions moving toward the counter electrode 5 repels the positive charge of the ion storage member 6, and the movement toward the counter electrode 5 is suppressed.

As a result, the amount of positive ions released toward the charged body A is reduced to be approximately the same as the amount of released negative ions whose production amount itself is reduced.
It can be released in a well-balanced manner.

In the above example, the case where the amount of positive ions produced is larger than the amount of negative ions produced is explained. However, when the amount of negative ions produced is larger than the amount of positive ions produced, the opposite is true. Phenomenon occurs, the amount of negative ions released toward the charged body A is reduced, and positive and negative ions are transferred to the charged body A.
It can be released in a well-balanced manner.

Further, the ion generator 1a of the present embodiment.
Then, the ion accumulating member 6 applies the insulating coating 13 to the conductor 12.
Since the grounding circuit 11 is galvanically insulated from the ground circuit 11, the capacitor can be locally configured. Therefore, the ion storage member 6 can store a larger amount of electric charge having the same sign as that of the ion having a larger production amount, and can more reliably suppress the movement of the ions toward the counter electrode 5. .

The ion storage member 6 is connected to the ground circuit 11
It suffices that it is insulated with respect to the conductor 12, and the conductor 12 without the insulating coating 13 as shown in FIG. 4 may be used. It goes without saying that the ion storage member 6 may itself be an insulator.

The ground circuit 11 may be connected to the ground 21 via the electric resistance 20, as shown in FIG. By doing so, the discharge current flowing into the counter electrode 5 can be detected, and can be used as a standard for determining whether corona discharge is normally occurring.

Further, in the present embodiment, the AC high frequency high voltage power supply 2 is described as including the piezoelectric transformer 16 for boosting the AC high frequency voltage generated by the oscillation circuit 14 by the piezoelectric element 15, but the piezoelectric transformer 16 is replaced. hand,
A winding transformer 22 may be provided as shown in FIG.

Next, a second embodiment of the present invention will be described.

As shown in FIG. 7, the ion generator (air ionizer) 1b of this embodiment has an AC high-frequency high-voltage power supply 2 and an AC high-frequency high-voltage power supply 2 via a high-voltage cable 3.
A plurality of needle electrodes 4 connected to each other, a counter electrode 5 provided to face the needle electrodes 4, and an ion storage member 6 provided between the needle electrodes 4 and the counter electrodes 5. , Housing 3
It is stored in 1 and equipped.

A plurality of needle-shaped electrodes 4 are provided radially through the insulating support member 32, and are connected to the high voltage cable 3 inside the insulating support member 32.

The counter electrode 5 is composed of a cylindrical conductor surrounding a plurality of radially arranged needle electrodes 4, and is connected to the ground wire (not shown) of the AC high frequency high voltage power supply 2 with the lead wire 1.
It is connected via 1a.

The ion storage member 6 has a cylindrical shape surrounding a plurality of radially arranged needle electrodes 4, and is provided on the inner peripheral side of the counter electrode 5. As a result, the ion storage member 6 is located on the straight line connecting the needle-shaped electrode 4 and the counter electrode 5, and when the needle-shaped electrode 4 is desired from the counter electrode 5, the needle-shaped electrode 4 is moved by the ion storage member 6. It is supposed to be shielded. The ion accumulating member 6 is provided with an insulating coating 13 on the conductor 12 and is galvanically isolated from the ground circuit (not shown) of the AC high frequency voltage power supply 2.

The housing 31 has an air suction port 33 on one side and an air blowout port 34 on the other side, and a motor (not shown) is provided between the air suction port 33 and the needle electrode 4. The fan 35 is driven to rotate.
The finger guard 3 is provided outside the air outlet 34.
6 is provided.

According to the ion generator 1b of the present embodiment, when the high frequency AC voltage is applied to the needle electrode 4 by the AC high frequency and high voltage power supply 2, the same operation as the ion generator 1a of the first embodiment is performed. Thus, it is possible to control the amount of positive and negative air ions toward the ion storage member 4 to be substantially equal. Then, the positive and negative air ions are blown out together with the air sucked from the air suction port 33 by the fan 35 to act as a static eliminator for the charged body B provided outside the air blowing port 34. You can

Here, the charged body B is the ion generator 1b.
Is a test device for measuring the performance of the metal plate 39, which is attached to the main body 38 via the insulating member 37, and inside the main body 38, a potential measuring device 40 for measuring the potential of the metal plate 39 and a metal plate. A high-voltage power supply 41 that applies electric charge to 39 and a timer 42 that measures the decay time of the potential of the metal plate 39 are provided.

Next, a performance test of the ion generator 1b of the present embodiment by the above test device will be described.

First, the ion generator 1b of this embodiment.
150 mm each for the (Example) and the conventional ion generator (comparative example) not including the ion storage member 6
An angular metal plate 39 is arranged at a position separated from the needle electrode 4 by a distance of 300 mm, an AC voltage of 7 kV _pp is applied to the needle electrode 4 by the AC high frequency high voltage power source 2, and positive and negative ions are generated by corona discharge. The offset voltage V ₀ when it was generated was measured. The offset voltage V ₀ is the charge accumulated in the metal plate 39 when the amount of positive and negative ions emitted from the ion generator 1b is uneven, and the smaller the absolute value of the voltage, the better the ion balance. Indicates. The results are shown in Table 1.

Next, the ion generator 1b of the present embodiment.
And the conventional ion generator without the ion storage member 6, the metal plate 39 is charged to ± 1000 V by the high voltage power source 41, and then the same AC voltage as the above is applied to the needle electrode 4. The time until the voltage of the metal plate 39 measured by the potential measuring device 40 is reduced to ± 100 V by generating positive and negative air ions by corona discharge was measured as the decay time by the timer 42. The results are shown in Table 1.

[0057]

[Table 1]

From Table 1, the ion generator 1 of this embodiment is shown.
According to b, the offset voltage V ₀ is −3 to +3, the absolute value is small, and the positive / negative balance is good, whereas the conventional ion generator has a large absolute value of −30 to −40. Moreover, it is clear that it is biased negatively.

Further, according to the ion generator 1b of the present embodiment, the decay times are substantially equal in both positive and negative, whereas in the conventional ion generator, the negative case is longer than the positive case. It is clear that

Therefore, the ion generator 1b of the present embodiment.
According to the above, it is clear that positive and negative ions can be released toward the charged body B in a well-balanced manner.

[Brief description of drawings]

FIG. 1 is a front view in which a part of an ion generator according to a first embodiment of the present invention is cut away.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a circuit diagram of the ion generator shown in FIG.

FIG. 4 is a circuit diagram of another aspect of the ion generator shown in FIG.

FIG. 5 is a circuit diagram of another aspect of the ion generator shown in FIG.

6 is a circuit diagram of another aspect of the ion generator shown in FIG.

FIG. 7 is an explanatory sectional view of an ion generator according to a second embodiment of the present invention.

[Explanation of symbols]

1a, 1b ... Ion generator, 2 ... AC high frequency high voltage power supply, 3 ... High voltage cable, 4 ... Needle-shaped electrode, 5 ... Counter electrode, 6 ... Ion storage member, 11 ... Ground circuit, 1
4 ... Oscillation circuit, 15 ... Piezoelectric element, 16 ... Piezoelectric transformer, 20 ... Electrical resistance, 31 ... Casing, 35 ... Fan.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Isao Sugano             1-10-8 Motomiya, Tsurumi Ward, Yokohama City, Kanagawa Prefecture             SID static electricity in Yokohama factory (72) Inventor Hidemi Nagata             1-10-8 Motomiya, Tsurumi Ward, Yokohama City, Kanagawa Prefecture             SID static electricity in Yokohama factory (72) Inventor Kenkichi Izumi             1-10-8 Motomiya, Tsurumi Ward, Yokohama City, Kanagawa Prefecture             SID static electricity in Yokohama factory

Claims (6)

[Claims] 1. An AC high-frequency high-voltage power supply, at least one needle-shaped electrode connected to the AC high-frequency high-voltage power supply, the needle-shaped electrode facing the needle-shaped electrode and connected to a ground circuit of the AC high-frequency high-voltage power supply. And a positive electrode generated by the corona discharge between the needle electrode and the counter electrode, the ion generator including at least one counter electrode that generates a corona discharge between the needle electrode and the counter electrode. Alternatively, the ion generator is provided with at least one ion accumulating member that accumulates negative air ions, and the ion accumulating member is insulated from a ground circuit of the AC high frequency high voltage power supply. 2. The ion generator according to claim 1, wherein the ion storage member is made of a conductor coated with an insulating coating and is galvanically isolated from a ground circuit of the AC high frequency high voltage power supply. . 3. The AC high frequency high voltage power supply comprises an oscillating circuit for generating an AC high frequency voltage by applying a DC voltage, and a piezoelectric transformer for boosting the generated AC high frequency voltage by a piezoelectric element to obtain a high voltage. The ion generator according to claim 1 or 2, characterized in that. 4. The ion generator according to claim 1, wherein the counter electrode is connected to a ground circuit of the AC high frequency high voltage power supply through an electric resistance. apparatus. 5. A housing in which the needle-shaped electrode and the counter electrode are arranged to face each other, and the ion storage member is arranged between the needle-shaped electrode and the counter electrode, and the housing provided in the housing. The ion generator according to any one of claims 1 to 4, further comprising: a fan that transfers positive or negative air ions generated by corona discharge. 6. The ion storage member is provided on a straight line connecting the needle electrode and the counter electrode so as to shield the needle electrode when the needle electrode is desired from the counter electrode. Any one of claims 1 to 5 characterized in that
Ion generator according to the item.