JPH11191478A - Ion generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ion generator capable of stably supplying ions, not affecting human body even a blowout hole is touched. SOLUTION: A needle electrode 2 as an discharge electrode and a negative ion generator comprising a high voltage power source 3 are disposed in an ABS made main body case 1, and is connected to an AC power surface 8, Only the blowout hole 4 of a negative ion blowout portion is made of a semiconductor, and is grounded by a ground 7. As the semiconductor, antistatic agent- kneaded-in conductive ABS material is used. When a blowout hole 4 is made of a conductor, preferably it is grounded by the ground 7 via a high resistor.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ion generator mounted on an air purifier or the like, and more particularly, to a negative ion generator.

[0002]

2. Description of the Related Art A negative ion generator mounted on an air purifier or the like applies a negative high voltage to a discharge electrode such as a needle or a thin wire to generate negative ions.

[0003] Since a high voltage is applied to the discharge electrode, the discharge electrode is made of the same material as that of the air purifier for the purpose of preventing electric shock due to accidental touching of the user's hand and preventing injury by a needle. It was covered by a plastic outlet such as ABS made of synthetic resin.

[0004]

When a plastic outlet such as ABS is used, the outlet itself becomes negatively charged due to external factors such as friction, or negative ions generated by a negative ion generator by itself. When the outlet is negatively charged, negative ions receive repulsion by the outlet, making it difficult for the ions to be released to the outside of the outlet, or the negative electric field formed by the charged outlet weakens the discharge itself, In some cases, the amount of negative ions generated was reduced.

[0005] Further, if the outlet is touched when negative ions are generated, the human body is charged by the negative ions and sometimes reaches 2 kV or more, which is generally said to cause an electric shock. There were safety issues, such as receiving an electric shock when touched.

As a countermeasure, Japanese Utility Model Application Laid-Open No. 63-12604 has been proposed.
As described in No. 4, the charged electric charge was released by grounding the synthetic resin outlet, but when the amount of generated negative ions was extremely large, the synthetic resin blow-out port was used. In some cases, electric charges could not escape simply by grounding the outlet.

An object of the present invention is to solve the above-mentioned problems of the prior art, and to provide an ion generator capable of stably supplying a large amount of ions to the outside and hardly charging a human body even when the outlet is touched. Aim.

[0008]

Means for Solving the Problems and Action / Effect The first invention has been made to solve the above-mentioned problems. In the first invention, a corona discharge is generated by applying a high voltage to a discharge electrode. In the ion generator that is discharged from the outlet, the outlet is made of a conductor, and a path for gradually discharging the electric charge accumulated in the outlet is provided.

According to a second aspect of the present invention, there is provided an ion generator in which a corona discharge is generated by applying a high voltage to a discharge electrode, and the generated ions are released from a discharge port. A path for discharging the electric charge accumulated in the outlet is provided.

The conductor mentioned here has a surface specific resistance of about 1 MΩ or less. For example, a metal and a conductive resin have relatively low surface specific resistance.

The semiconductor referred to here has a surface resistivity in the range of about 10 MΩ to 10 TΩ. For example, a conductive resin having a relatively high surface resistivity is used.

As a path for discharging the electric charge accumulated in the outlet, a wire is connected to the outlet so that the ground is directly grounded to an earth.
For example, there is a connection with a commercial AC of 100 V through a high resistance of 0 MΩ or more.

If the outlet is a conductor, the only way to discharge the electric charge accumulated in the outlet is to connect the wiring to the outlet directly to the ground directly. Will forcibly collide with the outlet which is maintained at almost zero potential and escape to the earth. On the other hand, when the outlet is grounded to the earth via a resistor, the speed at which the negative ions colliding with the outlet escape to the ground is delayed. In other words, the electric charge accumulated in the outlet is gradually reduced. The outlet is kept at an apparently low negative potential in order to escape to the source. Thus, the negative ions receive a repulsive force from the outlet and can be released to the outside. Since the potential held at the outlet is low, touching the outlet does not affect a person. The same effect can be obtained by connecting the outlet to an AC power supply via a resistor.

When the outlet is a semiconductor, since the semiconductor itself has a high resistance, if a path for discharging the electric charge accumulated in the outlet is provided, the electric charge is gradually discharged. It may be grounded.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to further clarify the configuration and operation of the present invention described above, a preferred embodiment of the present invention will be described below.

[0016]

FIG. 1 shows an ion generator according to the present invention. A
A negative electrode generator including a discharge electrode, a needle electrode 2 and a high voltage power supply 3 was installed in a body case 1 made of BS, and connected to an AC power supply 8. Only the outlet 4 of the negative ion outlet was made of a semiconductor, and was grounded by an earth 7.
As the semiconductor, a conductive ABS material into which an antistatic agent was kneaded was used. If the outlet 4 is made of a conductor, it is better to ground it to the earth 7 via a high resistance.

FIG. 2 shows an ion generator according to another embodiment of the present invention. The difference from FIG. 1 is that in FIG.
This embodiment is the same as FIG. 1 except that it is connected to an AC power supply 8 via a 100 MΩ resistor 9 in this embodiment.

FIG. 3 shows a comparative example of the present invention, in which the body case 5 made of ABS and the outlet 6 are made of the same ABS.

In the present invention shown in FIG. 2 and the comparative example shown in FIG. 3, the amount of negative ions generated when the outlet is not charged, the amount of negative ions generated when the outlet is rubbed with paper and forcedly charged, and the hand Table 1 shows the human body charging potential one minute after touching.

[0020]

[Table 1]

In the comparative example, almost no negative ions were emitted at the time of charging the outlet, and the human body charging potential when the outlet was touched was -2 kV or more. Also stably released negative ions, and the human body charged potential hardly increased.

FIG. 4 shows the evaluation of the amount of negative ions emitted while changing the value of the resistor 9 arbitrarily, with the outlet 6 of the ion generator of FIG. 2 being made of aluminum conductor.

From the results of FIG. 4, it was found that in the region where the resistance value was less than 10 MΩ, the negative ions were not released to the outside, but when the resistance value became 10 MΩ or more, the negative ions were released to the outside. I understand.

[0024]

As described above, according to the ion generator of the present invention, a large amount of ions are stably emitted to the outside, and even when the outlet is touched, the human body charging potential hardly increases.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention.

FIG. 2 is a diagram showing another embodiment of the present invention.

FIG. 3 shows a comparative example of the present invention.

FIG. 4 is a diagram showing an evaluation of the amount of negative ions emitted while changing the value of the resistor 9 arbitrarily, with the outlet 6 of the ion generator of FIG.

[Explanation of symbols]

 1,5 Main body case 2 Needle electrode 3 High voltage power supply 4,6 Blow-out port 7 Earth 8 AC power supply 9 Resistance

Claims (6)

[Claims] 1. An ion generator in which a corona discharge is generated by applying a high voltage to a discharge electrode and generated ions are emitted from an outlet, wherein the outlet comprises a conductor, and the outlet comprises a conductor. An ion generating device provided with a path for gradually discharging charges accumulated in the ion generator. 2. An ion generator in which a corona discharge is generated by applying a high voltage to a discharge electrode and generated ions are emitted from an outlet, wherein the outlet comprises a semiconductor, and the outlet comprises a semiconductor. An ion generating device provided with a path for discharging electric charges stored in the ion generator. 3. The ion generator according to claim 1, wherein the outlet is connected to an AC power supply via a resistor as a path for discharging the electric charge accumulated in the outlet. apparatus. 4. The ion generator according to claim 2, wherein the outlet is grounded as a path for discharging the electric charge accumulated in the outlet. 5. The ion generator according to claim 1, wherein the outlet is grounded via a resistor as a path for gradually discharging the electric charge accumulated in the outlet. 6. The ion generator according to claim 3, wherein the resistance is 10 MΩ or more.