JP2002075590A - Ion generation electrode, and ion generator and air conditioner using it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ion generation electrode capable of removing floating bacteria by supplying minus ions into the air. SOLUTION: This ion generation electrode has a dielectric 11, and inner and outer electrodes 12, 13 facing each other through the dielectric 11. The ion generation electrode simultaneously generates plus ions and the minus ions by applying an AC voltage between the inner and outer electrodes 12, 13. Mesh electrodes are used as the inner and outer electrodes 12, 13, and the mesh of the inner electrode 12 is set smaller than the mesh of the outer electrode 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ion generating electrode, an ion generating apparatus and an air conditioner using the same, and more particularly, to an ion generating electrode for simultaneously generating positive ions and negative ions. And an ion generator and an air conditioner using the same.

[0002]

2. Description of the Related Art Generally, in a closed room such as an office or a conference room with low ventilation, if there are many people in the room, air pollutants such as carbon dioxide, cigarette smoke, dust, etc. emitted by respiration. Therefore, negative ions having the effect of relaxing humans are reduced from the air. In particular, a large amount of negative ions are lost due to cigarette smoke, and may be reduced to about 1/2 to 1/5 of the normal amount. To replenish the negative ions in the air, various ion generators have been commercially available so far, but all of them generate only negative ions by a DC high voltage method.

[0003]

With a conventional ion generator that generates only negative ions, it is possible to replenish the negative ions in the air, but it is not possible to positively remove airborne bacteria in the air. Was.

[0004] The present invention has been made in view of such a conventional problem, and suppresses the generation of ozone.
An object of the present invention is to provide an ion generating electrode body that efficiently generates negative ions. Another object of the present invention is to provide an ion generator capable of removing suspended bacteria while supplying negative and positive ions to the air. It is a further object of the present invention to provide an air conditioner capable of removing airborne bacteria while supplying air and negative and positive ions.

[0005]

According to the present invention, the present invention has a dielectric material and inner and outer electrodes opposed to each other with the dielectric material interposed therebetween, and by applying an AC voltage between the inner and outer electrodes. An ion generating electrode body for simultaneously generating a positive ion and a negative ion, wherein a mesh electrode is used as the inner and outer electrodes, wherein the mesh of the inner electrode is finer than that of the outer electrode. A body is provided.

Here, from the viewpoint of efficiently generating ions while suppressing generation of ozone, the dielectric is preferably a cylindrical body having a capacitance of 40 pF or less. In order to seal the inside of the cylinder and prevent displacement of the inner and outer electrodes, plug members are preferably fitted to both ends of the cylinder. As such a stopper member, ethylene-propylene rubber (EPDM) is used. Is preferred.

In consideration of erosion by ozone, it is recommended that a stainless steel wire covered with a polyfluoroethylene resin be used as a lead wire connected to the inner and outer electrodes.

In order to increase the ion generation efficiency, the inner and outer electrodes are preferably brought into close contact with the dielectric.

From the viewpoint of suppressing the amount of ozone, an ozone decomposition catalyst may be supported on at least one of the dielectric, the inner electrode, and the outer electrode, or a catalyst carrier supporting the ozone decomposition catalyst may be mounted on the outer electrode. May be separately provided outside the.

According to the present invention, there is provided an ion generating apparatus comprising the above-mentioned ion generating electrode body, a blower, a high-voltage power supply circuit, and a filter.

Further, according to the present invention, there is provided an air conditioner equipped with the above-mentioned ion generating electrode body.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The present inventors have conducted intensive studies as to whether or not negative ions can be supplied to the air and that bacteria floating in the air cannot be removed. The present inventors have found out that it is necessary to cause such a problem, and have accomplished the present invention.

That is, the size of the ion generating electrode body of the present invention is large.
One of the key features is that the inner and outer electrodes
By applying an AC voltage between the positive and negative ions,
The point is that the eggplant ions are simultaneously generated. Inner and outer electrodes
By applying an AC voltage to
H⁺(H_TwoO)_nAnd O as a negative ion_Two ^-(H_Two
O)_nOccur simultaneously, and these react chemically to form active species.
Hydrogen peroxide (H _TwoO_Two) And / or hydroxyl radical
(.OH) and removes airborne bacteria
is there.

When the AC voltage applied to the ion generating electrode body is increased, the amount of generated positive ions and negative ions is increased, but the amount of generated ozone is also increased. Ozone is not required for human health, so its generation must be minimized. Therefore, a second major feature of the ion generating electrode body of the present invention is that mesh electrodes are used as the inner and outer electrodes, and the mesh of the inner electrodes is made finer than that of the outer electrodes. According to such a configuration, the positive ion
It is possible to suppress the generation of ozone while efficiently generating negative ions.

FIGS. 2 and 3 show the relationship between the number of meshes of the mesh electrode, the amount of generated ions, and the amount of generated ozone. In addition, "mesh" means the number of holes for one inch in length. Therefore, the mesh having a larger number of meshes has a finer mesh. FIG. 2 is a diagram showing the number of meshes of the inner electrode, the amount of generated ions, and the amount of generated ozone when the number of meshes of the outer electrode is 16 meshes. According to this figure, it is understood that the larger the number of meshes of the inner electrode (the finer the mesh), the greater the amount of generated ions and ozone. On the other hand, FIG. 3 is a diagram showing the number of meshes of the outer electrode, the amount of generated ions, and the amount of generated ozone when the number of meshes of the inner electrode is 40 meshes. According to this figure, it can be seen that, as the number of meshes of the outer electrode increases (the mesh becomes finer), the amount of generation of negative ions and ozone increases, and conversely, the amount of generation of positive ions decreases. Therefore, if the mesh of the inner electrode is made finer and the mesh of the outer electrode is made coarser, positive ions and negative ions can be efficiently generated while suppressing generation of ozone. Specifically, the mesh of the inner electrode is preferably 40 mesh, and the mesh of the outer electrode is preferably 16 mesh.

Hereinafter, the ion generating electrode body of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view showing one embodiment of the ion generating electrode body of the present invention. 1 includes a glass tube (dielectric) 11 and a glass tube 11.
And an outer electrode 13 disposed in close contact with the outer peripheral surface of the glass tube 11.
A pair of plug members 2 fitted to both ends of the glass tube 1;
2 ′, and the lead wire 3 is inserted into the glass tube through a hole 21 formed in the center of the plug member 2 and connected to the inner electrode 12. On the other hand, the lead wire 3 ′ is also connected to the outer electrode 13,
An AC voltage is applied to the inner electrode 12 and the outer electrode 13 from an AC voltage power supply (not shown) via the lead wires 3 and 3 '.

In the ion generating electrode body 1 shown in FIG.
Although a glass tube (“Neoceram”, outer diameter 20 mm) is used as 1, the material is not limited to this, and any material having an insulating property may be used. The shape is not particularly limited, and may be appropriately determined based on the shape and structure of the device to be mounted.

When the dielectric 11 has a cylindrical shape, the larger the outer diameter and the thinner the thickness, the larger the capacitance of the dielectric. In addition, ions are more likely to be generated as the capacitance of the dielectric increases. Therefore, considering only the efficient generation of ions, it can be said that it is better to increase the outer diameter and the thickness of the dielectric. However, when the outer diameter of the dielectric is increased, the amount of generated ions increases and at the same time the amount of ozone increases. Therefore, means for increasing the amount of ions while suppressing the increase in the amount of ozone was studied. 4 to 6 show specific data. In these figures, the mesh of the inner electrode is 40 mesh, the mesh of the outer electrode is 16 mesh, the thickness of the glass tube is 1.2 mm, and the outer diameter of the glass tube is 17 mm, 2 mm.
The graph shows changes in the concentration of negative ions, positive ions, and ozone with respect to the applied voltage when the values are changed to 0 mm and 24 mm. According to FIGS. 4 and 5, the concentration of the negative ions and the positive ions increases as the applied voltage is increased.
The density is higher than that of 7,20 mm. On the other hand, according to FIG. 6, the ozone concentration of 24 mm in outer diameter shows a much higher value than that of 17,20 mm in outer diameter. Comparing the increase in ion concentration and the increase in ozone when the outer diameter is changed from 20 mm to 24 mm, it can be seen that the increase in ozone is much larger than the increase in ion. Therefore, in order to increase the ion amount while suppressing the increase in the ozone amount, the outer diameter of the cylindrical dielectric is 20 m.
m or less is recommended.

FIGS. 7 and 8 show that the mesh of the inner electrode is 40 mesh, the mesh of the outer electrode is 16 mesh, the outer diameter of the glass tube is 20 mm, and the thickness of the glass tube is 1.2 mm.
The graph shows the change in concentration of negative ions, positive ions, and ozone with respect to the applied voltage when the distance is 1.6 mm. Comparing these figures, the thinner the thickness of the glass tube, the higher the ion concentration becomes, and the higher the fluctuation rate due to the applied voltage. Therefore, the thickness of the glass tube is 1.6 m
m or less is recommended.

When the relationship between the outer diameter and thickness of the glass tube and the capacitance was examined, the results shown in Table 1 were obtained. As described above, in order to increase the amount of ions while suppressing the increase in the amount of ozone, it is desirable that the outer diameter of the glass tube be 20 mm or less and the thickness of the glass tube be 1.6 mm or less. The capacitance is desirably 40 pF or less in consideration of measurement variations.

[0021]

[Table 1]

In FIG. 1, an inner electrode 12 and an outer electrode 13
Using wire mesh. The inner electrode 12 is generally called a high-voltage electrode, and uses a 40-mesh wire net made of stainless steel wire made of SUS316 or SUS304, which is plain-woven. On the other hand, the outer electrode 13 is generally called a GND electrode, and uses a 16-mesh wire net made of stainless steel wire made of SUS316 or SUS304, which is the same as the inner electrode 12, in a plain weave.

The inner electrode 12 and the outer electrode 13 are closely attached to the glass tube 11 from the viewpoint of increasing the ion generation efficiency. To bring the inner and outer electrodes 12 and 13 into close contact with the glass tube 11, a conventionally known method may be used. In order to make the outer electrode 13 adhere to the glass tube 11, for example, the following may be performed. Referring to FIG. 9, a plain woven wire mesh is rolled into a cylinder so that the wire has an angle of 45 degrees with respect to the axis of the cylinder when the cylinder is formed into a cylinder. Make it. At this time, the inner diameter of the manufactured outer electrode 13 is smaller than the outer diameter of the glass tube 11. Then, a force is applied to the outer electrode 13 from the axial direction (vertical direction in the figure),
The outer electrode 13 is compressed in the axial direction. Then, since the outer electrode 13 spreads in the radial direction, the glass tube 11 is inserted into the outer electrode 13 during this time. When the applied force is reduced, the outer electrode 13 extends in the axial direction in an attempt to return to the original state.
Shrink radially. Thereby, the outer electrode 13 is connected to the glass tube 1.
Closely adhere to 1

Referring to FIG. 10, as another method for bringing the outer electrode into close contact with the glass tube, a rib 131 having an inverted V-shaped cross section is provided radially outward in the axial direction of the cylindrical outer electrode 13. At the same time, the inner diameter of the outer electrode 13 is made smaller than the outer diameter of the glass tube 11. When the glass electrode 11 is pressed into the outer electrode 13, the narrow angle formed by the two sides of the inverted V-shaped rib 131 is widened and the inner diameter of the outer electrode 13 is increased. 11 can be inserted. After inserting the glass electrode 11 into the outer electrode 13,
Since the force to return to the original state is generated in the inverted V-shaped rib 131, the outer electrode 13 and the glass tube 11 are in close contact with each other.

On the other hand, as a method of bringing the inner electrode into close contact with the glass tube, for example, there is the following method. Referring to FIG. 11, a plain woven wire mesh is rolled into a cylinder, and the outer diameter of the manufactured inner electrode 12 is larger than the inner diameter of glass tube 11. At this time, both ends of the inner electrode 12 are left free without welding. Then, a force is applied in the tangential direction of the inner electrode 12 so as to round the tube, so to speak, the outer diameter (D +) of the inner electrode 2 which is larger than the inner diameter (D) of the glass tube 11.
α) is smaller than the inner diameter of the glass tube 12 (D−
α ′), and insert the inner electrode 12 into the glass tube 11. After the insertion, when the force applied in the tangential direction is released, the inner electrode 12 comes into close contact with the inner peripheral surface of the glass tube 11 due to the force of the inner electrode which attempts to return to the original state.

As another method of bringing the inner electrode into close contact with the glass tube, referring to FIG. 12, a plain woven wire mesh is rolled into a cylinder, and the outer diameter of the manufactured inner electrode 12 is larger than the inner diameter of the glass tube 11. Keep it. At this time, both ends of the inner electrode 12 are left free without welding. When one side end of the inner electrode 12 is pulled up in the axial direction and the other side end is pulled down in the axial direction, the inner electrode 12 is stretched while being twisted in the axial direction. As a result, the outer diameter of the inner electrode 12 becomes smaller and can be inserted into the glass tube 11, and after insertion,
When the force applied to the inner electrode 12 is released, the outer diameter of the inner electrode 12 tends to be increased, and the inner electrode 12 comes into close contact with the inner peripheral surface of the glass tube 11.

In FIG. 1, the plug members 2 and 2 ′ have a disk shape, and a peripheral projection 22 is formed on the peripheral edge on one side, and a side end of the glass tube 11 is provided near the center of the peripheral projection 22. A peripheral groove 23 to be fitted is formed. And on the side of the plug member 2,
An outer peripheral groove 24 for mounting the ion generating electrode body 1 is formed. A hole 21 having a thin film is provided at the center of each of the plug members 2 and 2 ′, and the thin film is subjected to a processing to be easily broken when the lead wire 3 is passed.

The depth of the peripheral groove 23 formed in the plug members 2 and 2 ′ is such that when the side end of the glass tube 11 abuts against the bottom of the peripheral groove 23, the inner electrode 12 and the outer electrode 13 are shifted. It is desirable that it is not to the extent. If the positions of the inner electrode 12 and the outer electrode 13 are misaligned, loss of electric capacity occurs when a voltage is applied to the electrodes. Table 2 specifically shows the relationship between the displacement and the loss amount. Here, the “position shift” means the shift in the left-right direction shown in FIG.

[0029]

[Table 2]

According to Table 2, the electric capacity is 38.8 pF when the position of the inner electrode 12 and the outer electrode 13 is not shifted, whereas the electric capacity is 38.8 pF when both electrodes are shifted by 5 mm.
The electric capacity was lost by about 6.7% as compared with the case where the position was not shifted to 6.2 pF. In the ion generating electrode body of the present invention, when plug members are fitted on both side ends of the glass tube, the displacement between the two electrodes can be suppressed to a maximum of about 2 mm.

A peripheral groove 23 formed in the plug member 2, 2 '
Is desirably slightly smaller than the thickness of the glass tube 11 from the viewpoint of strongly fitting the plug members 2 and 2 ′ to the glass tube 11.

The material of the plug members 2 and 2 'is not particularly limited, but an elastic member such as rubber is preferable because it can be easily fitted to the side end of the glass tube 11 and the glass tube 11 can be easily sealed. Among the elastic members, EPD is resistant to ozone generated by the ion generating electrode body.
M is more preferred.

The lead wires 3 and 3 'connected to the inner and outer electrodes are not particularly limited, and conventionally known ones can be used. However, stainless steel wires are made of polyfluoroethylene resin because of their excellent ozone resistance. Those coated with are preferred.

The ion generating electrode body 1 of FIG. 1 can be assembled, for example, as follows. First, the inner electrode 12 to which the lead wire 3 has been welded in advance is inserted inside the glass tube 11. Then, the plug member 2 is fitted to one side end of the glass tube 11 while the free end of the lead wire 3 is inserted into the hole 21 of the plug member 2. Next, the outer electrode 1 to which the lead wire 3 'has been welded in advance
After attaching 3 to the outside of the glass tube 11, a plug member 2 ′ is fitted to the other side end of the glass tube 11.

In order to efficiently remove the ozone inevitably generated in the ion generating electrode body, it is preferable to support an ozone decomposition catalyst on at least one of the dielectric, the inner electrode, and the outer electrode. This is because the generated ozone is gradually decomposed into oxygen even under normal circumstances, but the presence of the ozone decomposition catalyst further promotes the decomposition of ozone into oxygen. As such ozone decomposition catalyst, conventionally known ones such as manganese dioxide, platinum powder, lead dioxide, copper (II) oxide,
Nickel or the like can be used.

As a method for supporting the ozonolysis catalyst, for example, the ozonolysis catalyst may be dispersed in a binder and applied to the surface of the base material by a coating means such as dip, spin or spray. The amount of the ozone decomposition catalyst carried is not particularly limited, and may be appropriately determined based on the amount of ozone generated.

Further, a catalyst carrier carrying an ozone decomposition catalyst may be provided outside the outer electrode. FIG. 14 shows an example of an ion generating electrode body provided with such a catalyst carrier.
Outside the cylindrical outer electrode 13, a cylindrical catalyst carrier 4 is provided at a predetermined distance. The catalyst carrier 4 is reticulated, and an ozone decomposition catalyst such as manganese dioxide is carried on its surface. Note that the catalyst carrier 4 is the outer electrode 1
3 may be covered, or may be partially covered.

Next, the ion generator of the present invention will be described. A major feature of this ion generator is that it has the above-described ion generating electrode body. As a result, negative ions and positive ions are simultaneously generated,
Eliminate airborne bacteria. This will be described below with reference to the drawings.

The ion generator 100 shown in FIG. 15 includes the ion generating electrode 1, a blower 101, a filter (not shown), and a high-voltage power supply circuit 102 including a high-voltage transformer 102a and a control board 102b. The air taken in from the blow-in port, after dust is removed by a filter, reaches the blower 101 and is sent from there to the ion generating electrode body 1. The ion generating electrode body 1 simultaneously generates positive ions and negative ions from air by applying a predetermined AC voltage from the high-voltage power supply circuit 102. Airborne bacteria in the air are removed by the action of the negative and positive ions. On the other hand, ozone is secondarily generated when positive and negative ions are generated. The amount of ozone generated by the ion generating electrode body 1 is usually within an allowable range,
If necessary, an ozone decomposition catalyst is supported on the ion generating electrode body 1, or a catalyst carrier is disposed in a ventilation path,
The amount of ozone in the air blown out of the apparatus may be reduced. The air containing ions and from which the suspended bacteria have been removed is blown out of the apparatus.

The ion generator of the present invention can be miniaturized, can be installed anywhere without taking up space, and can be hung on a wall. It is also possible to unitize. The unitization makes it possible to easily incorporate it into various products such as home electric appliances.

Next, the air conditioner of the present invention will be described. A major feature of the air conditioner of the present invention is that the above-described ion generating electrode body is mounted. This allows the removal of airborne bacteria in the air, in addition to the original function of purifying the indoor air. This will be described below with reference to the drawings.

FIG. 16 is an exploded perspective view showing an embodiment of an air purifier as an air conditioner of the present invention. The air purifier includes a main body 5 fixed on a base 51, a filter 6 stored in a storage section 51 (shown in FIG. 17) formed on the front side of the main body 5, and a filter before covering the stored filter 6. A cover 7 and a rear cover 8 that covers the rear side of the main body 5 are provided.

The filter 6 comprises a pre-filter 61, a deodorizing filter 62 and a dust collecting filter 63 in this order from the front. The pre-filter 61 collects dust and dirt in the air sucked by the air purifier. As a material of the pre-filter 61, for example, polypropylene having high air resistance is preferable. The deodorizing filter 62 has a three-layer structure in which a non-woven fabric made of polyester is attached to a rectangular frame, activated carbon is uniformly dispersed on the non-woven fabric, and a non-woven fabric made of polyester is attached thereon. With such a structure, odor components in the air such as acetaldehyde, ammonia, and acetic acid are absorbed and removed. Dust collection filter 63
Folds a filter medium consisting of melt-blown nonwoven fabric ("Tremicron" manufactured by Toray Industries) and aggregate (polyester / vinylon-based nonwoven fabric), heat-presses antibacterial sheets on the upper and lower surfaces, and forms this into a frame After insertion, the frame is welded. The dust collecting filter 63 collects small dust and dirt in the air.

The front cover 7 has a curved shape such that the center in plan view is slightly convex, and a suction port 71 for sucking room air is formed in the center in front view. Front cover 7
Is fixed to the main body 5 at a certain distance from the main body 5, and the gap between the front cover 7 and the main body 5 becomes a side suction port 72 (shown in FIG. 18) for sucking room air.

Next, a perspective view of the main body 5 is shown in FIG. The main body 5 has a vertically long rectangular parallelepiped shape, and has a storage portion 51 which is recessed inward in a substantially rectangular shape for storing the filter 6 at the front center portion, and a radial slot at the bottom center portion of the storage portion 51. Is formed. Further ventilation 5
At the center of 2, a concave portion 53 for mounting a motor 56 (shown in FIG. 18) is further formed. On the back side of the concave portion 53, a fan 57 (shown in FIG. 18) is mounted on the rotating shaft of the motor 56. An operation unit 54 provided with a power switch, an air volume, a timer, an operation mode changeover switch, an operation status display lamp, and the like, and a viewing window 55 for visually confirming an operation state of the ion generating electrode body are provided at an upper portion of a front surface of the main body 5. Is formed.

FIG. 19 shows a rear perspective view of the air purifier.
An air outlet 81 having a large number of four-stage slit holes is formed on the upper inclined surface of the rear cover 8, and an ion outlet 82 having a large number of slit holes is formed on the upper left inclined surface. I have. Further, a handle 84 made of a rectangular recess is provided at the upper center of the rear cover 8, and a locking portion 85 for hanging on a wall is provided at the four corners of the central flat portion.

FIG. 18 is a side sectional view of the air purifier. When the fan 57 is rotated by the motor 56, the front cover 7
The air is sucked from the suction port 71 and the side suction port 72 of the fan, and the sucked air passes through the filter 6 and the fan 5.
7, where the flow changes upward and heads for the outlet 81. A bypass passage 59 is formed on the way to the ion generating electrode body 1 attached to the upper part (upper right upper part) of the main body 5, and a part of the discharged air passes through the bypass passage 59. 1 (see FIG. 20). From a part of the air led to the ion generating electrode body 1,
Negative ions and positive ions are simultaneously generated by the ion generating electrode body 1, and air containing negative ions and positive ions is discharged from the ion outlet 82. When the ions are generated, ozone is also generated at the same time. However, the ions are decomposed into oxygen by the catalyst carrier 4 provided on the outside of the outer electrode 13 and supporting the ozone decomposition catalyst.
The amount of ozone contained in the air discharged from 2 is kept low.

FIG. 21 is a partially enlarged view of the bypass passage 59 and the ion generating electrode body 1. Passage opening 58 is fan 5
Part of the air that opens in the rotation direction of the fan 7 and is sent by the fan 57 is taken into the bypass passage 59 from the passage opening 57. After passing straight (fan rotation direction), the bypass passage 59 changes its direction to the front of the air cleaner, dives below the ion generating electrode body 1 and further turns upward to reach the ion generating electrode body. Consists of

In FIG. 18, a viewing window 55 is provided at the front of the main body facing the ion generating electrode body 1 so that the operating state of the ion generating electrode body 1 can be visually recognized from the outside. A protective cover 50 is attached to the surface of the viewing window 55 so that air does not leak from the inside of the device.
The protective cover 50 protects the entire front surface of the main body 5 including the viewing window 55 (excluding the storage section), and is preferably a sheet-like material having an opening at a portion corresponding to the storage section 51. For example, if a transparent resin material is used as the material and a metallic silver color is applied or silk-printed on the back surface, it gives a solid feeling when viewed from the front. At this time, the front cover 7
If the color tone is see-through, a cool feeling and a clean feeling are brought out in combination with the color of the protective cover 50.

Next, an example of the operation of the air purifier will be described. First, the power switch of the operation unit 54 is turned on.
Then, the operation is started in the automatic operation mode. The fan 57 is rotated by the motor 56, and the suction port 7 of the front cover 7 is
Air is sucked into the machine through the first and side suction ports 72. Then, large dust and dust in the air are collected by the pre-filter 61, odor components are adsorbed and removed by the deodorizing filter 62, and small dust and dust are collected by the dust collecting filter 63. The air from which dust, dust and odor have been removed by the filter 6 is
The air is discharged from the air outlet 81 by the fan 57 to the outside of the machine, and a part of the air is sent from the passage opening 58 to the ion generating electrode body 1 via the bypass passage 59.

An AC voltage of about 1.75 V has been applied to the ion generating electrode body 1 since the start of the operation of the air cleaner.
Here, negative ions and positive ions are generated from the air. At the same time, ozone is also produced secondarily. At this time, the concentration of negative ions and positive ions was 2
10,000 / cc and the ozone concentration is 0.01 ppm or less.
The bacteria floating in the air are removed by the action of negative ions and positive ions generated simultaneously by the ion generating electrode body. According to experiments by the inventor, the bacteria removal rate was 86% two hours after the start of the operation, 93% four hours later, and 99% twenty hours later.

In order to generate a large amount of ions, the AC voltage applied to the ion generating electrode body 1 may be increased.
Increasing the AC voltage increases the amount of ozone generated.
Therefore, in order to suppress the generation of ozone while efficiently generating ions, the AC voltage applied to the ion generating electrode body is preferably set to 2.0 kV or less. With such an AC voltage, the highest value (0.1 ppm) of the reference concentration, 1
The ozone concentration can be suppressed to / 10 or less. In addition, by supporting the ozone decomposition catalyst on the ion generating electrode body 1 or by providing the catalyst carrier 4 supporting the ozone decomposition catalyst, the upper limit voltage value that can be applied can be increased to 2.5 kV. Can be generated.

The present invention is not limited to the above-described embodiment, and it goes without saying that many modifications and changes can be made within the scope of the present invention. For example, in the above-described embodiment, an air purifier has been described as an example. Is also applicable.

[0054]

According to the ion generating electrode body of the present invention, inner and outer electrodes are provided at positions opposed to each other with a dielectric therebetween.
Since a mesh electrode is used as the outer electrode, the mesh of the inner electrode is made finer than that of the outer electrode, and a positive ion and a negative ion are simultaneously generated by applying an AC voltage between the inner and outer electrodes. Suspended bacteria can be removed while supplying negative ions to the air.

When the dielectric is a cylindrical body having a capacitance of 40 pF or less, ions can be efficiently generated while suppressing generation of ozone. In addition, if plug members are fitted to both ends of the cylinder, the inside of the cylinder is sealed and
The displacement of the outer electrode can be prevented. If ethylene-propylene rubber (EPDM) is used as such a plug member, more excellent effects can be obtained.

When a stainless steel wire coated with a polyfluoroethylene resin is used as a lead wire connected to the inner / outer electrodes, erosion by ozone generated by the ion generating electrode body can be effectively prevented.

When the inner and outer electrodes are brought into close contact with the dielectric, the ion generation efficiency can be increased.

If an ozone decomposition catalyst is supported on at least one of the dielectric, the inner electrode, and the outer electrode, or if a catalyst carrier supporting the ozone decomposition catalyst is separately provided outside the outer electrode, the amount of ozone can be suppressed. be able to.

Since the ion generating apparatus of the present invention is provided with the above-mentioned ion generating electrode, it is possible to remove airborne bacteria in the air in addition to the original function of replenishing negative ions into the air.

Since the air conditioning apparatus of the present invention is equipped with the above-mentioned ion generating electrode, it is possible to remove suspended bacteria while replenishing the amount of negative ions in the air.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing one embodiment of an ion generating electrode body of the present invention.

FIG. 2 is a diagram showing the relationship between the mesh of inner electrodes and the concentration of positive ions, negative ions, and ozone.

FIG. 3 is a diagram showing a relationship between a mesh of outer electrodes and concentrations of positive ions, negative ions, and ozone.

FIG. 4 is a diagram illustrating a relationship between an outer diameter of a dielectric and a negative ion concentration.

FIG. 5 is a diagram showing a relationship between an outer diameter of a dielectric and a positive ion concentration.

FIG. 6 is a diagram showing a relationship between an outer diameter of a dielectric and an ozone concentration.

FIG. 7 is a diagram showing the relationship between the thickness of a dielectric and the concentration of positive ions, negative ions, and ozone.

FIG. 8 is a diagram showing the relationship between the thickness of a dielectric and the concentration of positive ions, negative ions, and ozone.

FIG. 9 is a diagram showing an example of a means for bringing an outer electrode into close contact with a glass tube.

FIG. 10 is a view showing another example of a means for bringing an outer electrode into close contact with a glass tube.

FIG. 11 is a diagram showing an example of a means for bringing an inner electrode into close contact with a glass tube.

FIG. 12 is a view showing another example of a means for bringing an outer electrode into close contact with a glass tube.

FIG. 13 is a diagram for explaining a positional shift between an inner electrode and an outer electrode.

FIG. 14 is a view showing another embodiment of the ion generating electrode body of the present invention.

FIG. 15 is a sectional view showing one embodiment of the ion generator of the present invention.

FIG. 16 is a front perspective view showing an embodiment of the air purifier of the present invention.

FIG. 17 is a perspective view of a main body of the air purifier of FIG.

FIG. 18 is a longitudinal sectional view of the air purifier of FIG.

FIG. 19 is a rear perspective view of the air purifier of FIG. 16;

20 is a diagram showing an air flow passage of the air purifier of FIG.

FIG. 21 is a diagram showing an air passage to an ion generating electrode body of the air cleaner of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ion generation electrode body 2, 2 'stopper member 3, 3' lead wire 4 Catalyst carrier 11 Glass tube (dielectric) 12 Inner electrode 13 Outer electrode 100 Ion generator 101 Blower 102 High voltage power supply circuit

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Mamoru Morikawa 22-22 Nagaikecho, Abeno-ku, Osaka City, Osaka F-term (reference) 3L053 BD01 4G075 AA03 BA08 CA15 CA54 DA02 EB41 EC06 EC21 EE02 EE15 FA03 FB02 FB13 FC15

Claims (10)

[Claims] 1. A semiconductor device comprising: a dielectric; and inner and outer electrodes opposed to each other with the dielectric interposed therebetween. By applying an AC voltage between the inner and outer electrodes, positive ions and negative ions are simultaneously generated. An ion generating electrode body, wherein a mesh electrode is used as the inner and outer electrodes, and the mesh of the inner electrode is finer than that of the outer electrode. 2. The ion generating electrode according to claim 1, wherein the dielectric is a cylinder having a capacitance of 40 pF or less. 3. The ion generating electrode body according to claim 2, wherein plug members are fitted to both side ends of the cylindrical body to seal the inside of the cylindrical body and prevent displacement of the inner and outer electrodes. 4. The ion generating electrode body according to claim 3, wherein said plug member is made of ethylene-propylene rubber. 5. The ion generating electrode according to claim 1, wherein a stainless steel wire coated with a polyfluoroethylene resin is used as a lead wire connected to the inner / outer electrodes. 6. The ion generating electrode body according to claim 1, wherein said inner and outer electrodes are closely attached to said dielectric. 7. The ion generating electrode according to claim 1, wherein at least one of the dielectric, the inner electrode, and the outer electrode carries an ozone decomposition catalyst. 8. The ion generating electrode body according to claim 1, wherein a catalyst carrier carrying an ozone decomposition catalyst is further provided outside the outer electrode. 9. An ion generator comprising: the ion generating electrode body according to claim 1; a blower; a high-voltage power supply circuit; and a filter. 10. An air conditioner equipped with the ion generating electrode body according to claim 1.