JP2002324651A - Negative ion generating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a negative ion generating device which is capable of generating ion stably without requiring a fan means for removing the ion at the surroundings of the electrode. SOLUTION: The negative ion generating device is equipped with an insulating cover (2, 74, 84, 124A, 124B) surrounding the high voltage electrode (1a, 73, 83, 123A, 123B) or a grounding means for grounding a grille that lets pass the negative ion.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a negative ion generator for irradiating a user with negative ions to obtain a health effect. The present invention also relates to a negative ion generator for generating negative ions in a vehicle.

[0002]

2. Description of the Related Art In recent years, many negative ion generators are commercially available because of their health benefits. For example, a high voltage (kv order) is applied to an electrode.
It is known that electrons are emitted toward free space around an electrode, and then negative ions are generated by collision of the electrons with air molecules.

In the case of this type of negative ion generator, if continuous operation is performed and negative ions are filled near the electrodes, the generation of negative ions may be hindered.
In order to prevent this, a configuration is generally adopted in which air is blown in the vicinity of the electrodes so that negative ions are not filled. Further, as a conventional technique, there is a method in which a negative high voltage is applied to a needle-like electrode and electrons are emitted into the air to generate negative ions. When applying this method to a vehicle, it is conceivable to install a needle-shaped electrode to which a negative high voltage is applied in a ventilation duct of an air conditioner or an air purifier.

[0004]

However, blowing air requires space and cost in terms of the installation location of the blower. Particularly, when the negative ion generator is installed in a personal space such as for a vehicle, the blower is not used. There is a problem that the personal space is narrowed because the personal space is pressed. In addition, ducts in vehicles are often made of an insulator such as acrylonitrile butadiene styrene (ABS) or polypropylene (PP). When a needle-like electrode is placed near these insulators, the insulator becomes There is a problem in that the electron emission from the needle electrode is suppressed due to the negative charge, and no negative ions are generated.

A first object of the present invention is to provide a negative ion generator for stably generating negative ions without requiring a blower for eliminating negative ions in the periphery of the electrode. It is in. A second object of the present invention is to prevent the negative ion generator from charging the insulator near the discharge needle electrode, thereby suppressing the emission of electrons and preventing the generation of negative ions. is there.

A third object of the present invention is to make it possible to control whether or not to generate negative ions in a negative ion generator.

[0007]

In order to achieve the first and second objects, the means described in claim 1 can be employed. According to this means, since the negative ions attached to the duct-like structure are released to the ground by the means for grounding the insulating duct-like structure, stable discharge is performed from the high-voltage electrode.

The means for grounding the insulative duct-like structure may be a conducting wire for directly connecting the insulative duct-like structure to the ground as described in claim 2. Alternatively, a high-impedance electrical resistance path connected between the insulating duct-like structure and the ground may be used. Further, according to the means of claim 4, the amount of generated negative ions is not too small, and the amount of generated ozone is not too large.

According to the fifth aspect of the present invention, since the insulating cover covering the side surface of the high-voltage electrode is grounded, negative ions attached to the cover are released to the ground, so that the high-voltage electrode can be stably output from the high-voltage electrode. Discharge is performed. Furthermore, according to the means of claim 6, since the insulating grill through which the negative ions radiated from the high voltage electrode pass is grounded, the negative ions attached to the grill are released to the ground, so that the high voltage electrode is stable. Discharge is performed.

According to the seventh aspect of the present invention, in the vehicle negative ion generator, the negative ions charged to the duct structure are released to the ground via the metal member, so that the high voltage electrodes are stably discharged. Is performed. In addition, by adopting the means of claim 8, since the metal member is installed on the side of the traveling direction of the negative ions generated by the electron emission from the tip of the electrode outside the duct-like structure, the duct structure The negatively charged negative ions are more reliably released to the ground.

Further, by adopting the means of claim 9, a mounting space for the high voltage generating amplifier can be secured. Furthermore, by employing the means of claim 10, electrons are easily emitted from the needle-like discharge electrode. Furthermore, by employing the means of claim 11, the effect of any of the means of claims 1 to 10 can be obtained in an environment where the duct is charged and emission of electrons stops.

Further, by adopting the means of the twelfth aspect, the negative ions can easily spread from the ceiling in the vehicle compartment to the entire room. In order to achieve the third object, the means described in claim 13 can be adopted. According to this means, it is possible to control the generation of negative ions by switching and using one selected from the plurality of discharge electrodes by the switch.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following description, the same reference numerals indicate the same components. FIG. 1 is a sectional view showing a schematic configuration of a negative ion generator according to one embodiment of the present invention. In the figure, 1 is a negative ion generator, 1a is an electrode of the negative ion generator 1, 2 is a cover of the negative ion generator 1, 2a is a hole formed in the cover to release negative ions, 2b is a hole 2a. A grill,
3 is a high impedance member for grounding the cover, 4
Is earth. The cover 2 and the grill 2b form an insulating duct-like structure. In the illustrated example, the cover 2 is integrally formed with an insulating grill formed around the hole 2a. However, the grill 2b may be formed of a member different from the cover 2. The cover 2 and the grill 2b are formed of an insulating material such as acrylonitrile butadiene styrene (ABS) or polypropylene (PP).

The electrode 1a of the negative ion generator has a potential of several kilovolts by the negative ion generator 1, and emits negative ions outward from the hole 2a. At this time, if the inside of the cover 2 is left as it is, the negative ions are more and more filled. In order to prevent the negative ions from being filled, according to the embodiment of the present invention,
Discharge is performed through the high impedance member 3 of 10 ⁶ MΩ to 10 ¹⁴ Ω, and a stable discharge can be obtained from the electrode 1 a by allowing negative ions to escape to the ground.

FIG. 2 is a circuit diagram showing an electric circuit configuration of the negative ion generator shown in FIG. In the figure,
11 is a voltage circuit, 12 is an overcurrent protection circuit, 13 is a switch circuit, and 14 is a high voltage generation transformer circuit. When the power is turned on and the switch signal SW is turned on, the voltage output from the voltage circuit 11 is applied to the high voltage generating transformer circuit, whereby a high voltage is applied to the electrode 1a to generate negative ions. At this time, as described above, the cover 2 tries to be charged by the filling of the negative ions,
The high impedance member 3 allows negative ions to escape to the ground. That is, charging occurs on the cover 2 and the cover 2
It is necessary to lower this potential to the ground level in order to prevent the potential from dropping abruptly. However, if electric charges are released with a low impedance, the amount of current becomes large and harmful ozone is generated in large quantities. On the other hand, if the impedance is too high, the charge amount of the cover 2 increases, and the amount of generated negative ions is too small. Therefore, for example, 10 ⁶ Ω or more and 10
By grounding the ground 2 with a high impedance of the order of ¹⁴ Ω or less, negative ions can be stably generated without generating ozone, and thus without charging the cover 2.

FIG. 3 is a graph showing the result of an experiment on the relationship between impedance and the amount of negative ions when the behavior of the amount of negative ions generated when the cover 2 is charged is examined. As shown in the figure, if the impedance is 10 ¹⁴ Ω or more, the amount of generated negative ions is too small. FIG. 4 is a graph showing an experimental result of examining the relationship between the impedance and the amount of generated ozone. As shown, when the impedance is 10 ⁶ Ω or less, the amount of generated ozone is too large.

FIG. 5 is a sectional view showing a schematic configuration of a negative ion generator according to a second embodiment of the present invention.
1 is different from FIG. 1 in that an antistatic resin member 5 is provided on the cover 2 and the antistatic resin member 5 is grounded to the ground 4 instead of the cover 2. As a material of the antistatic resin member 5, for example, a metal mixed material on the order of 10 ¹⁰ Ω is used.

As a result, the cover 2 is less likely to be charged, so that the same effects as in the first embodiment can be obtained. FIG.
FIG. 7 is a sectional view showing a schematic configuration of a negative ion generator according to a third embodiment of the present invention. In the figure, the difference from FIG. 1 is that a switch 6 is provided between the high impedance member 3 and the ground 4. When the cover 2 is charged, the switch 2 is turned on to release the charge to the ground 4. This also makes it difficult for the cover 2 to be charged, so that the same effect as in the first embodiment can be obtained.

The switch 6 may be provided between the high impedance member 3 and the cover 2. In each of the above-described first to third embodiments, the cover 2 is grounded via the high impedance member 3, but instead, the insulating cover 2 is grounded directly via a conductor. The same effect as described above can be obtained. Further, although the cover 2 and the grill 2b have been described as being integrated, they may be composed of separate members. Also in this case, the cover 2 and the grill 2b are formed of an insulating member, and instead of grounding the cover 2 with or without the high impedance member 3, the grill 2b is connected with the high impedance member 3 or The same effect as described above can be obtained even if grounding is not performed.

FIG. 7 is a perspective view showing a schematic configuration of a negative ion generator according to a fourth embodiment of the present invention.
In the figure, a negative ion generator is attached to a ventilation duct. Reference numeral 71 denotes a ventilation duct which forms a ventilation path for an air conditioner or an air purifier, for example, AB
It is formed of an insulating resin such as S or PP. 72
Is an amplifier for generating a high voltage. The amplifier includes an oscillation circuit, a booster circuit, and a rectifier circuit. Wiring is provided so that the high voltage generated by the amplifier 72 is transmitted to the needle electrode 73. The amplifier 72 is mounted outside the duct 71, and a pedestal 75 for mounting the needle electrode 73 is provided in a part thereof. Pedestal 75
Penetrates the wall of the duct 71 so that the needle-shaped electrode 73 is arranged inside the duct 71. The needle-like electrode 73 has a pedestal 7 inside the duct 71 with its tip directed in the direction in which wind is blown out.
5 above.

Numeral 74 is provided in the direction of travel of negative ions radiated from the tip of the needle-shaped electrode of the duct 71, that is, so as to be in close contact with the outer periphery of the downstream portion with respect to the flow direction of wind in the duct. It is a metal member such as an installed metal foil or metal plate, and a part thereof is electrically grounded. Next, the operation of the negative ion generator shown in FIG. 7 will be described.

The amplifier 7 which is supplied with a voltage from the power supply 76
2 boosts and rectifies the power supply voltage and applies a DC voltage of about -4 to 6 kV to the needle electrode 73. As a result, electrons are emitted from the needle electrode 73 and the electrons collide with oxygen molecules and water molecules in the air, thereby generating negative ions. The generated negative ions are released into the passenger compartment by the wind of the air conditioner.

At this time, if there is no metal member 74 that plays the role of ground, the duct 71 made of an insulator takes a negative charge, so that the potential difference between the needle electrode 73 and the surrounding environment becomes small, The emission of cations stops, and the generation of negative ions stops. That is, the metal member 74 plays a role of always causing stable emission of electrons by releasing the electric charge accumulated in the duct 71 to the ground.

The charging of the duct and the stop of the emission of electrons vary depending on the conditions. For example, when the voltage of the needle electrode is -6 kv and the distance between the tip of the electrode and the duct is about 30 mm or less, it is likely to occur. . Another way to prevent charging of the duct is to make the duct itself conductive.However, in this case, a corona discharge occurs between the duct and the tip of the electrode, and ozone is generated with an increase in the discharge voltage. It can be more harmful to the human body. As an example of the condition for generating ozone, the electrode voltage is-
In the case of 6 kv, the distance between the electrode and the grounded conductor is 20
In the case of about mm, the ozone generation amount is 0.02 ppm (a level that can be detected by a person).

FIG. 8 is a perspective view showing a schematic configuration of a negative ion generator according to a fifth embodiment of the present invention.
In the figure, the negative ion generator is installed in a place other than the ventilation path, and the needle electrode is covered by a duct 81 on the bag. Unlike the case of FIG. 6, the duct 81 is open in only one direction, and a high voltage generating amplifier 82 is installed on the surface of the duct 81 opposite to the opening. A needle electrode 83 is provided on the amplifier 82, and the needle electrode 83 penetrates a wall of the duct 81, and a tip portion is disposed inside the duct 81. The metal member 84 is a metal foil or a metal plate installed so as to be in close contact with the outer periphery of a portion of the duct 81 in the opening direction from the position where the needle-shaped electrode is installed, and a part thereof is electrically grounded. .

Next, the operation of the negative ion generator shown in FIG. 8 will be described. The negative ion generator of FIG. 8 is installed in a place where the wind does not flow, and a DC voltage of about −4 to 6 kv is applied to the needle electrode 83 by the amplifier 82 as in the case of FIG. Generated.
The generated negative ions are supplied into the room from the opening by diffusion. Since more negative ions remain in the duct than in FIG. 7, the duct 81 is more easily charged, and thus the necessity of the ground 4 is high.

FIG. 9 is a perspective view showing a mounting position of a negative ion generator according to a sixth embodiment of the present invention.
In FIG. 7, the negative ion generator is mounted in the state shown in FIG. 7 in an air conditioner outlet 92 of a vehicle 91 or an air purifier installed on a ceiling 93. Further, the negative ion generator alone is mounted on ceilings 93 and 94 in the state of FIG.

FIG. 10 is a view showing a mounting position of a negative ion generator according to a seventh embodiment of the present invention, and is a view when the vehicle is viewed from above. In the figure, two negative ion generators 102A and 102B are attached to one vehicle 101. The negative ion generator 102A is mounted on the right side of the ceiling of the vehicle 101, and the negative ion generator 102B is mounted on the vehicle 10
It is attached to the left side of the ceiling of No. 1. Switch 103
The signal is transmitted to the control amplifier 94 by the
From 04, a signal is provided to activate the left and right negative ion generators 102A and 102B separately.

Thus, negative ions can be generated separately according to the preference of the right occupant and the left occupant of the vehicle 101. That is, the negative ion generator 102A is for the right occupant, and the negative ion generator 102B is for the left occupant. Each time the switch 103 installed beside the driver's seat is pressed, the control amplifier 104 turns the left and right negative ion generators 102A and 102B on or off.

FIG. 11 is a side view of the vehicle shown in FIG. As shown, negative ion generators 102A and 102B are mounted on the ceiling of a vehicle 101. Since negative ions are heavier than air, mounting the negative ion generator on the ceiling provides an effect that the negative ions can easily spread in the vehicle interior. FIG. 12 is a diagram showing a circuit configuration of the negative ion generator according to the eighth embodiment of the present invention. In the figure, 121A and 121B are ducts in a vehicle, 122 is a high voltage generation amplifier, 123A and 123B are needle electrodes, 124A and 124B are metal members, 125 is a battery (DC power supply), 126 is a switch, 127 and 128 is a contact of the switch 126.

In this embodiment, when negative ions are generated from two places, one negative ion generator is not placed in two places as shown in FIG. Shaped electrodes 123A and 123
B and operate each separately. As shown in the figure, a single high-voltage generating amplifier 122 branches a high-voltage wiring into two and connects them to the needle electrodes 123A and 123B, respectively. Needle electrodes 123A and 123B are connected to ducts 121A and 121B, respectively.
And metal members 124A and 124 serving as a ground.
4B. Metal members 124A and 124B
A switch 126 is provided between the ground and the ground, and its contacts 127 and 128 are respectively connected to metal members 124.
It plays the role of switching the connection between A and 124B and the ground.

In this embodiment, the cost is reduced by using a single negative ion generator. Normally, it is difficult to switch after a high voltage is generated, so that two high voltage output units cannot be separately controlled by one high voltage generator. However, by controlling the charging state of the duct as shown in FIG. 12, it is possible to control only the generation of negative ions while the needle-shaped electrode, which is a high-voltage electrode, is output.

The effect will be described with reference to FIG. 12. The high voltage generated by the high voltage generation amplifier 122
Supplied to both 3A and 123B. However, when the contact 127 of the switch 126 is grounded, the metal member 124A is grounded, so that the generation of negative ions from the needle electrode 123A occurs continuously.
Since 24B is not grounded, no discharge occurs from the needle electrode 123B, and the generation of negative ions stops. When the switch 126 is switched so that the contact 128 is grounded, the discharge from the needle electrode 123A stops and the discharge starts from the needle electrode 123B. Thus, by switching the switch 126, it is possible to control the generation of negative ions.

FIG. 13 is a perspective view showing a schematic configuration of a negative ion generator according to a ninth embodiment of the present invention. The negative ion generator of this embodiment is a modification of the embodiment shown in FIG. That is, in the present embodiment, the high voltage generating amplifier 72a is provided inside the duct 71. If there is no space for mounting the high-voltage generating amplifier around the duct 71, the mounting space can be secured by installing the summer generating amplifier 72a in the ventilation passage as in this embodiment.

The embodiments of the present invention described above are merely examples, and the present invention is not limited to these embodiments. For example, the negative ion generator according to the present invention is not limited to a vehicle, but may be installed in a living space, an office or the like.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a schematic configuration of a negative ion generator according to an embodiment of the present invention.

FIG. 2 is a circuit diagram showing an electrical circuit configuration of the negative ion generator shown in FIG.

FIG. 3 is a graph showing experimental results on the relationship between impedance and the amount of negative ions when the behavior of the amount of negative ions generated when the cover 2 is charged is examined.

FIG. 4 is a graph showing an experimental result obtained by examining a relationship between impedance and an ozone generation amount.

FIG. 5 is a sectional view showing a schematic configuration of a negative ion generator according to a second embodiment of the present invention.

FIG. 6 is a sectional view showing a schematic configuration of a negative ion generator according to a third embodiment of the present invention.

FIG. 7 is a perspective view showing a schematic configuration of a negative ion generator according to a fourth embodiment of the present invention.

FIG. 8 is a perspective view showing a schematic configuration of a negative ion generator according to a fifth embodiment of the present invention.

FIG. 9 is a perspective view showing a mounting position of a negative ion generator according to a sixth embodiment of the present invention.

FIG. 10 is a view showing a mounting position of a negative ion generator according to a seventh embodiment of the present invention, and is a view of a vehicle as viewed from above.

11 is a view of the vehicle shown in FIG. 10 as viewed from the side.

FIG. 12 is a diagram showing a circuit configuration of a negative ion generator according to an eighth embodiment of the present invention.

FIG. 13 is a perspective view showing a schematic configuration of a negative ion generator according to a ninth embodiment of the present invention.

[Explanation of symbols]

 1a ... electrode 2 ... cover 2a ... hole through which negative ions pass 2b ... grill 3 ... high impedance member 5 ... antistatic member 6 ... switch 14 ... high voltage generating transformer circuit 73 ... needle electrode 102A ... negative ion generator 102B ... Negative ion generator 126 ... Switch

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) F24F 7/00 F24F 7/00 B H01T 23/00 H01T 23/00 (72) Inventor Takao Okui Kariya, Aichi 1-1-1 Showa-cho, Denshi Co., Ltd. Denso Co., Ltd. (72) Inventor Maki Saito 1-1-1, Showa-cho, Kariya City, Aichi Prefecture (72) Mikio Nakamura 1-1-1, Showa-cho, Kariya City, Aichi Prefecture Address F-term in DENSO Corporation (Reference) 4D054 AA11 BA19 BB04 BB30 CB03 CB04

Claims (13)

[Claims] 1. A negative ion generator for generating negative ions by emitting electrons from a high-voltage electrode, comprising: an insulating duct-like structure surrounding the high-voltage electrode; and a means for grounding the duct-like structure. A negative ion generator characterized by comprising: 2. The negative ion generator according to claim 1, wherein the grounding means is a conductor directly connecting the duct-like structure and the ground. 3. The negative ion generator according to claim 1, wherein said grounding means is a high-impedance electric resistance path connected between said duct-like structure and ground. 4. The high impedance is from 10 ⁶ Ω to 1
4. The negative ion generator according to claim 3, wherein the value is between 0 ¹⁴ Ω. 5. The duct-like structure includes an insulating cover covering a side surface of the high voltage electrode, and an insulating grill having a hole through which negative ions generated by electron emission from the high voltage electrode pass. The means for grounding the duct-like structure comprises means for grounding the cover.
The negative ion generator according to any one of the above. 6. The duct-like structure includes an insulating cover that covers a side surface of the high-voltage electrode, and an insulating grill that has a hole through which negative ions generated by electron emission from the high-voltage electrode pass. The means for grounding the duct-like structure includes means for grounding the grill.
The negative ion generator according to any one of the above. 7. The duct-like structure has a metal member that contacts a part of the outside thereof, and the means for grounding the duct-like structure includes means for grounding the metal member. The negative ion generator according to claim 1, wherein 8. The negative ion generator according to claim 7, wherein the metal member is provided outside the duct-like structure on the side of the traveling direction of the negative ions emitted from the tip of the electrode. 9. An input from a DC power supply is stepped up to a negative DC
A high-voltage generating amplifier for generating a high voltage, wherein the high-voltage electrode is connected to an output of the high-voltage generating amplifier, and the high-voltage generating amplifier is installed inside the duct-shaped structure. The negative ion generator according to claim 7 or 8, wherein 10. The negative ion generator according to claim 1, wherein the high-voltage electrode has a needle shape. 11. The negative ion generator according to claim 1, wherein a distance between the high-voltage electrode and the insulating duct-like structure is within 30 mm. 12. The negative ion generator according to claim 1, which is disposed on a ceiling of a vehicle. 13. A negative ion generator for generating negative ions by emitting electrons from a plurality of discharge electrodes, wherein a plurality of insulating duct-like structures each storing the plurality of discharge electrodes. A switch having a plurality of switch contacts connected to a part of the outside of each of the plurality of duct-like structures, and a common switch terminal grounded corresponding to the plurality of switch contacts. A negative ion generator, wherein the switch switches and connects the common switch terminal to one of the plurality of switch contacts.