JP2002200437A - Air cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air cleaner capable of improving electrifying efficiency to dust and capable of further stabilizing a discharge range without deteriorating blow performance. SOLUTION: A counter electrode part 30 is obtained by press-working a punching net consisting of a conductive copper plate and forming in a section corrugated shape in which plural circular-arc parts 32 are continuously arranged. Many open holes 31 for ventilation are provided at the counter electrode part 30. An electrified part 3 is constituted by disposing a discharge part 20 consisting of a discharge wire at almost center in a thickness direction of an angular frame-shaped charge housing frame 10 and disposing the counter electrode part 30 while facing the arc parts 32 toward outside at an air inflow side and an air outflow side of the discharge part 20 so as to interpose the discharge part 20. At this time, both counter electrode parts 30 may be arranged so that the open holes 31 opened at both counter electrode parts 30 are placed so as to opposite or both counter electrode parts 30 may be arranged so that the open holes 31 are placed so as not to be opposite.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an air purifier. Specifically, the present invention relates to a structure of a charging unit of the air purifier.

[0002]

2. Description of the Related Art FIG. 16 is an exploded perspective view of a general air cleaner 1. The air purifier 1 has a blower unit 5 including a sirocco fan for sucking and introducing indoor air and discharging the indoor air again into a main body case 6 having a front panel that can be opened and closed. A pre-filter 2 for removing large dust and dust, a charging unit 3 for charging dust in the air after removing large dust and the like, and a dust collecting unit 4 for capturing and removing the charged dust are provided.

The charging section 3 includes a discharge section 20 formed of a discharge wire such as a bare copper wire having conductivity, and a counter electrode section 30 formed of a conductive plate having conductivity. They are arranged facing each other at a fixed distance. In the charging unit 3, by discharging between the discharge unit 20 and the counter electrode unit 30, dust in the air flowing into the charging unit 3 can be charged. Therefore, in consideration of the performance of the air purifier 1, it is desired to improve the charging efficiency and the amount of air blown to the dust in the inflowing air.

[0004] The air purifier 1 in consideration of these viewpoints,
For example, it is disclosed in JP-A-2000-70760. FIG. 17 is a schematic configuration diagram showing the charging section 3 and the like of the air purifier 1, and FIG. 18 is a cross-sectional structural view of the charging section 3. In the charging section 3, a plurality of arc portions 32 are continuously formed. The discharge unit 20 is provided in a continuous manner and has a corrugated cross section. In addition, a large number of openings 31 are formed in the arc portion 32 so as not to hinder the flow of the air flowing into the charging portion 3. Also, as shown in FIG. 18, the discharge unit 20 is disposed substantially at the center of each of the arc portions 32 and substantially on the same plane as the lower surface of the counter electrode portion 30. It is stored in a frame-shaped charging storage frame 10. The charging section 3 is housed in the main body case 6 so as to be interposed between the pre-filter 2 and the dust collecting section 4 so as to be substantially perpendicular to the air blowing direction.

[0005] In such a charging section 3, since discharge is radially performed from each discharge section 20 toward the counter electrode section 30,
The discharge efficiency is relatively excellent, and the opening 31 is also formed in the counter electrode portion 30, so that the air flow is sufficiently ensured.

[0006]

However, the discharge is performed only in the range where the counter electrode portion 30 is opposed, and the discharge range is not widened. For this reason, the time when the dust passes through the charging unit 3 is short, the chance of the dust being charged is reduced, and the charging efficiency is reduced. On the other hand, as shown in FIG. 19, when a uniform electric field is created by applying a DC voltage to the parallel flat metal plate (discharge portion 30), initial electrons generated from the surface of the metal plate serving as a negative electrode are generated. The logarithm of the electron i changes linearly with the interval X between the metal plates as shown in the following equation. However,
As the interval X is increased to keep the electric field constant, a higher voltage is applied. Log (i) Ｘ X

On the other hand, if the time required for the dust to pass through the charging section 3 is to be lengthened, the radius of the arc section 32 must be increased, and the charging section 3 and thus the air purifier 1 must be enlarged. Was.

As a result, the interval X between the metal plates can be increased or the applied voltage can be increased in order to lengthen the residence time. However, in the air purifier 1, the interval X between the metal plates is constant and the applied voltage is also increased. Since it is constant, the electric field in the charging unit 3 is always constant. Further, if the applied voltage is also set to a high voltage, the charging area is widened, but it is not possible to set the charging voltage to a high voltage due to safety restrictions. Further, since the counter electrode part 30 and the discharge part 20 are not parallel flat plates, This causes variations in the discharge range.

Further, if the entire circumference of the discharge portion 20 is surrounded by the counter electrode portion 30, the discharge range is widened and the chance of discharging is improved, but there is a problem that air cannot be blown.

[0010] The present invention has been made in view of the above-mentioned problems of the prior art, and without reducing the blowing performance.
An object of the present invention is to provide an air purifier 1 with improved charging efficiency for dust and a more stable discharge range. Another object is to fix the discharge part 20 and the counter electrode part 30 by an easy assembling method.

[0011]

The air purifier of the present invention comprises:
A charging unit that includes a discharge unit and a counter electrode unit, and charges the dust by discharging from the discharge unit to the counter electrode unit; a dust collection unit for collecting the charged dust; and air to the charging unit and the dust collection unit. In the air purifier provided with an air blowing means, the counter electrode portion is formed of a conductive plate having a large number of openings for ventilation, and the counter electrode portion is provided on an air inflow side and an air outflow side of the discharge section. It is characterized by:

[0012] At this time, the opening may be formed so that the opening formed in the counter electrode on the air inflow side and the opening formed in the counter electrode on the air outflow side do not face each other. An opening can be formed by facing an opening formed in the counter electrode on the air inflow side with an opening formed in the counter electrode on the air outflow side.

[0013] In the present invention, the counter electrode portion may include:
It is preferable to arrange them so as to be almost equidistant from the discharge part.

[0014] For example, the counter electrode portion may be formed in a cross-sectional waveform shape in which a plurality of circular arc portions are continuously arranged, and the discharge portion may be positioned substantially at the center of each circular arc portion.

[0015] Further, the counter electrode portion may be constituted by arranging a plurality of cylindrical portions continuously, and the discharge portion may be positioned substantially at the center of the cylindrical portion.

Further, the counter electrode portion is formed in such a manner that a plurality of arc portions are continuously arranged, and a cross-sectional waveform shape in which arc portions near the air inflow side and arc portions near the air outflow side alternately appear, The discharge section may be located substantially at the center of each arc section.

In these air purifiers, one side wall of a rectangular frame-shaped charging housing frame for accommodating the discharge section and the counter electrode section is configured to be openable, and inner side walls located on both sides of the openable side wall are provided. Preferably, a guiding groove for guiding the widthwise end of the counter electrode portion is provided, and further, on the inner surface of the insertion side wall of the counter electrode portion of the charging storage frame, the insertion side end of the counter electrode portion is provided. It is desirable to provide a positioning groove for insertion.

Alternatively, the counter electrode portion is formed of a metal mesh and includes a plurality of support shafts arranged substantially in parallel with the discharge portion, and the counter electrode portion is alternately provided on the air inflow side and the air outflow side of the discharge portion. The support shaft may support the counter electrode portion so as to be positioned.

In this case, it is preferable that one end of the counter electrode is fixed, and the free end of the counter electrode is wound around a roll and fixed.

In the air purifier of the present invention, the discharge section is constituted by a plurality of discharge wires having both ends fixed, and the center of the discharge wire is connected to the other end of the elastic body having one end fixed. It is preferable to provide a guide mechanism for laying the discharge wire fixed and folded back substantially in parallel.

Further, the discharge section is composed of one discharge wire having both ends fixed, and the central portion of the discharge wire is fixed to the other end of the elastic body having one end fixed, and the folded discharge line is formed. It is desirable to have a guide mechanism for laying in substantially parallel.

In these cases, at least one end of the discharge wire is preferably wound and fixed in a roll shape.
It is desirable to provide a winding guide mechanism on the fixed end side of the discharge wire.

[0023]

FIG. 1 is a sectional view schematically showing an air cleaner 1 according to an embodiment of the present invention, FIG. 2 is a schematic circuit diagram of a charging section 3 of the air cleaner 1, and FIG. FIG. 4 is a comparative explanatory view showing the charging efficiency of each structure of the charging unit 3, FIG. 4 is a diagram showing the charging unit of the air cleaner 1, FIG. 4A is an exploded perspective view thereof, and FIG. It is the perspective view.

The air purifier 1 shown in FIG. 1 has substantially the same configuration as the air purifier 1 of the prior art, and flows into the main body case 6 by a blower 5 provided on the outlet side (air outlet side). The discharged air passes through the charging unit 3 and the dust collection unit 4 and is discharged from the air from the outlet side. In the air purifier 1 shown in FIG. 1, the pre-filter 2 is omitted.

In the charging section 3, plate-shaped counter electrodes 30 are arranged on the air inflow side (inlet side) and the air outflow side (outlet side) of the discharge section 20 composed of a discharge wire having conductivity. ing. That is, in the charging unit 3, the counter electrode units 30 each formed of two flat conductive plates are disposed so as to face each other, and the discharge unit 20 formed of a discharge wire is sandwiched between the counter electrode units 30. It is arranged.
A large number of openings 31 are formed in each counter electrode portion 30 so as not to hinder the flow of air. Further, the opening holes 31 formed in the respective counter electrode portions 30 are formed so as not to face each other. At this time, if the opening holes 31 formed in the counter electrode portion 30 on the air inflow side and the opening holes 31 formed in the counter electrode portion 31 on the air outflow side are opened so that they do not face each other, the charging section 3, the residence time of the dust can be lengthened, and the dust removing effect can be further enhanced.
On the other hand, by opening the opening holes 31 facing each other,
The ventilation rate can be further increased. Further, the opposed opening holes 31 may be formed so as to be shifted by a half pitch position without being shifted by one pitch.

FIG. 2 is a schematic circuit diagram of the charging section 3. The counter electrode section 30 is grounded, and a DC voltage of, for example, about 7 kV is applied to the discharge section 20 sandwiched between the counter electrode sections 30. As a result, discharge is performed from the discharge part 20 toward the counter electrode part 30, and the discharged electrons collide with molecules in the air. The positive ions generated when the molecules are in the excited state charge the dust passing through the charging unit 3.
Thereafter, the dust that has passed through the charging unit 3 is adsorbed by the dust collection unit 4 including a grounded filter, and dust in the air is removed.

FIG. 3 shows a comparison of charging efficiency for each structure of the charging section 3. As shown on the left side of FIG.
As disclosed in Japanese Patent Application Laid-Open No. 0-70760, if the charging efficiency when the plate-shaped counter electrode portion 30 having a corrugated shape with respect to the linear discharge portion 20 is arranged on the outlet side of the discharge portion 20 is 1,
As shown in the middle of FIG. 3, if the linear discharge portion 20 is sandwiched between the plate-shaped counter electrode portions 30, the charging efficiency becomes 1 to 3.
It becomes 2. Further, as shown in the right diagram of FIG. 3, when the discharge portion 20 is formed as a center and the counter electrode portion 30 is arranged around the discharge portion 20, the charging efficiency becomes 3 or more. The measurement conditions are as shown in FIG.

As described above, the charging section 3 in the air purifier 1 according to the present invention includes the flat counter electrode section 30 provided with the opening holes 31 on both the air inflow side and the air outflow side of the discharge section 20. Since they are arranged, the discharge area increases, and the charging efficiency can be improved. In addition, the opening 3 on the air inflow side
Each counter electrode 30 is provided with an opening 31 so that the opening 1 does not oppose the opening 31 on the air outflow side.
, The residence time of the dust in the charging unit 3 is relatively long, and the charging efficiency can be further improved.

FIGS. 4A and 4B are explanatory views showing the structure of the charging section 3 in the air cleaner 1 according to the first embodiment. FIG. 4A is an exploded perspective view, and FIG. 4B is a schematic perspective view. It is.
The charging unit 3 is configured in a charging housing frame 10 having a square frame shape, and is substantially parallel to the opening surface.
A plurality of discharge units 20 are arranged substantially at the center in the thickness direction. One side wall 11 of the charging housing frame 10 is fixed to the remaining charging housing frame 10 by a hinge mechanism 12 so that the side wall 11 can be opened and closed.
On the inner surfaces of both side walls adjacent to the side wall 11, guide grooves 13 are provided at positions sandwiching the discharge part 20 so as to insert the end in the width direction of the counter electrode part 30. In addition, a positioning groove portion 14 is provided on the inner surface of the side wall 11 that can be opened and closed and on the inner surface of the side wall facing the side wall 11 so that the end in the insertion direction of the counter electrode 30 can be inserted. The positioning groove 14 is formed in substantially the same shape as the end face of the counter electrode 30 on the insertion direction side, and has a structure in which the side end face fits into the positioning groove 14.

As a result, by opening the side wall portion 11 that can be opened and closed, the counter electrode portion 30 can be slid from the side of the charging housing frame 10 and housed in the charging housing frame 10, and the charging housing frame 10 can be assembled. It will be easier. In particular, since the guide groove 13 is provided on the inner surface of both side walls adjacent to the side wall, the counter electrode portion 30 can be provided at a constant interval from the discharge portion 20. Furthermore, since the positioning groove 14 is provided, the structure is such that the four sides of the counter electrode portion 30 are supported, and the gap between the counter electrode portion 30 and the discharge portion 20 can be maintained constantly and reliably, and a stable charged area can be obtained. Can be formed.

FIGS. 5A and 5B are explanatory views showing the discharge unit 20. FIG. 5A is an explanatory plan view of the discharge unit 20, and FIG. 5B is an explanatory view showing a method of fixing the discharge unit 20. Further, flat portions 10a and 10b are provided at both ends of the charging housing frame 10. For example, as shown in FIG. 5B, both ends of the discharge wire of the discharge unit 20 are fixed to two fixing units 25 provided on one flat surface 10 a. Another remaining flat portion 10b
, One end of an elastic body 21 such as a helical spring for applying tension to the discharge wire is fixed, and the other end of the elastic body 21 is fixed substantially at the center of the discharge wire. As a result, the discharge unit 20 is provided so as to reciprocate in the charging housing frame 10. Further, the flat portion 10b is provided with two rollers 22 and two hinges 24 for one discharge wire, and the tensioned discharge wire can be stretched substantially in parallel. Thus, the discharge line can be provided without slack by one elastic body 21, the rotor 22, and the hinge 24, and a stable charging area can be formed. In particular,
Since the tension can be applied to the central portion of the discharge wire by one elastic body 21, the discharge wire can be laid with a small number of elastic bodies 21. Alternatively, although not shown, at least the side wall of the charging housing frame 10 on the side to which the elastic body 21 is fixed may be made of an elastic resin material, and may be used in place of the spring-like elastic body 21. By using the resin material, the elastic body 21 is not required, and the number of components can be reduced. In particular, since the elastic body 21 can be dispensed with, it is preferable that the attachment of the discharge wire is further facilitated. Although the discharge unit 20 shown in FIG. 5 uses two discharge lines, the number of discharge lines is not limited.

FIG. 6 is an explanatory plan view showing another discharge portion 20. The discharge portion 20 is constituted by one discharge wire, and both ends thereof are fixed to one flat portion 10b. It is fixed to the part 25. Further, one end of an elastic body 21 is fixed substantially at the center of the flat portion 10b. The discharge unit 20 is stretched by a plurality of guiding rollers 22 so as to reciprocate in the charging housing frame 10 (two reciprocations in the figure), and the central part thereof is the elastic body 2.
1 is fixed to the other end. As a result, one elastic body 2
1 can constitute the discharging unit 20, and the charging unit 3
Can be easily assembled.

Further, in the discharge section 20 shown in FIG. 7, instead of the fixing section 25, the ends of the discharge wires are wound around a roll section 26 which can be wound into a roll, and can be fixed. I have. By adopting such a configuration, the discharge wire can be laid without loosening, and the discharge wire is wound around the roll portion 26 in advance in a large amount.
When the discharge efficiency decreases, wind up the old discharge wire,
By exposing a new discharge line, the same effect as replacing the discharge line can be performed with a simple operation. At this time, as shown in FIG. 8, it is preferable to provide a guide mechanism 23 near the roll portion 26 of the discharge wire. The guide mechanism 23 reliably keeps the stretched discharge wires parallel even if the rolls on which the discharge wires are wound have different radii. As a result, the interval between the discharge units 20 can be kept constant, and a more stable discharge state can be secured.

As described above, in the air purifier 1 of the present invention, it is possible to secure not only a sufficient amount of air but also a stable discharge state and to effectively remove dust in the air. .

FIG. 9 is a sectional view schematically showing an air cleaner 1 according to still another embodiment of the present invention. In the air cleaner 1, the opening 31 is opened such that the openings 31 provided in the two counter electrodes 30 face each other. By providing the opening holes 31 so as to face each other, the air that has flowed in from the air inflow side passes straight through the opening holes 31 on the air outflow side, so that the amount of blown air can be further increased. For this reason, it can be said that this embodiment is more preferable when it is desired to secure the air flow rate rather than the charging efficiency.

FIG. 10 is a sectional structural view of the charging unit 3 in the air cleaner 1 according to another embodiment of the present invention. Also in the charging section 3, the counter electrode section 30 is arranged so that the distance from the discharge wire to the counter electrode section 30 is substantially equal, and only the shape of the counter electrode section 30 is different. In the drawing, the counter electrode portion 30 is arranged around each discharge portion 20 so as to have a substantially regular hexagonal cross section, and is connected at the apex of the regular hexagonal column. Also,
In the counter electrode portion 30, a large number of opening holes 31 are formed at least in a region facing the air inflow side and the air outflow side. With such a structure, a discharge region is formed around the discharge portion 20 as shown in FIG.
Discharge efficiency can be improved.

A flat insertion piece 33 is formed at the end of the counter electrode section 30 in the width direction, and can be inserted along the guide groove 13 formed on the inner surface of both side walls of the charging housing frame 10. Has become. The positioning groove 14 provided in the charging housing frame 10 is formed to have the same shape as the end face of the counter electrode 30 in the insertion direction.

Also in the counter electrode portion 30, the opened opening 31 may be provided so that the air inlet side and the air outlet side do not face each other, for example, similarly to the counter electrode portion 30 shown in FIG. Also, as shown in FIG. 9, the opening holes 31 may be provided so as to face each other, and the former has a longer residence time of dust than the latter, so that the charging effect can be improved.
Further, in the counter electrode portion 30, a large number of opening holes 31 can be provided not only in the regions facing the air inflow side and the air outflow side, but also in other regions.

Further, in the charging section 3 shown in FIG.
The discharge portion 20 is sandwiched between the two counter electrode portions 30. The two counter electrode portions 30 are each formed in a cross-sectional waveform shape in which a plurality of arc portions 32 are continuously arranged. The counter electrode portion 30 is formed of a punching net made of a conductive copper plate, and is formed into a cross-sectional waveform by pressing. Further, a large number of opening holes 31 are formed in the counter electrode portion 30. Such counter electrode portions 30 are arranged so that the two arc portions 32 face outward, and the discharge portion 20 is arranged so as to be located substantially at the center of each arc portion 32. Therefore, also in the charging section 3,
The distance from each discharge unit 20 to the counter electrode unit 30 is substantially equal.

In the example shown in FIG.
The widthwise ends of the counter electrode portion 30 are each bent in a direction opposite to the direction in which the arc portion 32 is formed, and the bent portion 34 is formed, for example, as disclosed in Japanese Patent Application Laid-Open No. 2000-70760.
It is held by a vertical rib (not shown) formed on the side wall of the charging housing frame 10. With such a configuration, the counter electrode portion 30 can be stably and easily held in the charging housing portion 10. Of course, also in this case, the insertion piece 33 is not bent at the width direction end of the counter electrode portion 30 as in the counter electrode portion 30 shown in FIG.
May be formed and inserted into the guiding groove 13.

By configuring such a charging section 3, the discharge section 20 and the counter electrode section 30 have the coaxial relationship shown in FIG. 3, and the charging efficiency is improved by two to three times as compared with the conventional configuration. be able to. Also in this case, it goes without saying that the openings 31 of the counter electrode portion 30 may be opened facing each other, or may be opened so as not to face each other.

In the charging section 3 shown in FIG. 12, the counter electrode section 30 has cylindrical sections 35 made of a copper plate arranged continuously, and the side faces of the cylindrical section 35 are joined by welding or conductive adhesive. Have been. In addition, the discharge unit 20 includes
5 are arranged at substantially the center. In the counter electrode portion 30, an insertion piece 33 is provided at an end in the width direction, and the insertion piece 33 is attached to the guiding groove 13 of the charging housing frame 10.
It can be inserted into. With such a structure, the charging efficiency can be improved without reducing the amount of air blown.

Further, in the charging section 3 shown in FIG.
A plurality of arc portions 32 are continuously arranged, and the arc portions 32 near the air inflow side and the arc portions 32 near the air outflow side are formed in a cross-sectional waveform shape alternately appearing. It is arranged so as to be located substantially at the center of the part 32. Also in the counter electrode part 30, a large number of opening holes 31 are opened to secure a ventilation volume. Even with such a structure, the charging efficiency can be improved.

FIG. 14 is a perspective view of still another embodiment of the present invention, in which the charging section 3 is partially cut away. In the charging section 3, the counter electrode section 30 is made of a metal mesh, and a plurality of support shafts 36 are provided in the charging housing frame 10 substantially in parallel with the discharge section 20. The support shaft 36 and the discharge unit 20 are arranged in two rows in the vertical direction with respect to the air inflow direction of the charging housing frame 10. The support shafts 36 and the discharge portions 20 in the row are arranged so as to appear alternately. The counter electrode portions 30 are alternately supported by the support shafts 36 arranged as described above, and are arranged so that the counter electrode portion 30 is located on the air inflow side, the air outflow side, and the air inflow side of the discharge unit 20. The widthwise end of the counter electrode portion 30 is opposite to the counter electrode portion 30.
Is fixed to the lower end or upper end of the widthwise side wall of the charge storage frame 10 by a method such as pinning or pinching by the fixing shaft 37. In this way, it can be positioned so as to be almost equidistant from the discharge part 20 and the counter electrode part 30.

As a result, the discharge area extends to both the air inflow side and the air outflow side of the discharge part 20, and the charging efficiency is improved. Further, since the counter electrode portion 30 is made of a metal mesh, it is possible to easily secure a ventilation volume.
Has a rounded cross-sectional shape, the air flow resistance is reduced, and the influence on the air flow can be reduced. Further, as compared with a case where the conductive plate is processed into a predetermined shape and stored in the charging housing frame 10, there is a merit that the assembling of the charging unit 3 is facilitated.

In the charging section 3 shown in FIG.
At the width direction end of the counter electrode portion 30, a roll portion 38 in which a metal mesh can be wound in a roll shape is provided. One roll portion 38 is wound with a metal mesh, and the other roll portion 38 is wound. An end portion in the width direction of the metal mesh is fixed to the roll portion 38, and the roll portion 3 on which the metal mesh is wound is formed by rotating the roll portion 38 on the end side.
From 8, the metal mesh can be wound around the other roll portion 38.

As a result, if a large amount of the metal mesh is wound in a roll in advance, when the discharge efficiency is reduced due to dust adhering to the metal mesh, the new metal mesh is charged by rotating the roll portion 38. It can be exposed to the part 3. By doing so, the same effect as replacing the counter electrode portion 30 anew can be performed with a simple operation, and the discharge efficiency can be always kept high.

Further, as shown in FIG.
If the side wall 11 is attached by the hinge mechanism 12 so that the side wall 11 can be opened and closed, the work of replacing the roll portion 38 around which the metal mesh is wound can be facilitated.

As described above, in the present invention, the opening hole 31
Are arranged on the air inflow side and the air outflow side of the discharge part 20 to increase the charging effect while securing the air flow rate. This embodiment can achieve the effect. For example, it is needless to say that the present invention is not limited to the above-described embodiment, and various applications can be made without departing from the scope of the present invention.

[0050]

According to the air purifier of the present invention, in the charging section for charging the dust, the counter electrode section made of a conductive plate having a large number of ventilation holes is formed on the air inflow side of the discharge section and the air. Since the discharge area is provided on the outflow side, the discharge area is increased, and the charging efficiency can be improved while securing the air flow rate. As a result, an air purifier having an excellent dust removing effect can be provided.

At this time, if the opening holes formed in the counter electrode portion on the air inflow side and the opening holes formed in the counter electrode portion on the air outflow side are formed so as not to face each other,
The residence time of the dust in the charging section can be lengthened, and the dust removing effect can be further enhanced. On the other hand, by opening the openings facing each other, it is possible to further increase the ventilation amount.

Further, by arranging the counter electrode portion so as to be substantially equidistant from the discharge portion, the dust removing effect can be further enhanced.

In particular, the counter electrode portion is made of a metal mesh and has a plurality of support shafts arranged substantially parallel to the discharge portion, and the counter electrode portion is alternately provided on the air inflow side and the air outflow side of the discharge portion. When the counter electrode portion is supported by the support shaft so as to be positioned, the air inflow resistance is reduced, and the air flow rate can be further increased.

At this time, by fixing one end of the counter electrode portion made of a metal mesh and winding the free end of the counter electrode portion in a roll shape, a new metal mesh region can be easily exposed. Even when the discharge efficiency is reduced, it is possible to easily return to the high discharge efficiency again.

Further, in the present invention, the discharge section is
It is composed of a plurality of discharge wires or one discharge wire whose both ends are fixed, and the central part of the discharge wire is fixed to the other end of the elastic body having one end fixed, and the folded discharge wire is laid almost in parallel. Therefore, the number of elastic bodies for fixing can be reduced while maintaining the tension of the discharge unit.

At this time, by winding at least one end of the discharge wire in a roll shape, a new discharge wire can be easily exposed, and even if the discharge efficiency is lowered, a high discharge voltage is again obtained. You can easily return to efficiency.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional configuration diagram of an air purifier according to an embodiment of the present invention.

FIG. 2 is a schematic circuit diagram of a charging unit of the air purifier shown in FIG.

FIG. 3 is a comparative explanatory diagram showing charging efficiency by structure of a charging unit.

4A and 4B are explanatory views showing the structure of a charging unit in the air purifier shown in FIG. 1, wherein FIG. 4A is an exploded perspective view and FIG. 4B is a schematic perspective view.

FIGS. 5A and 5B are explanatory views showing a discharge unit in the air purifier, wherein FIG. 5A is an explanatory plan view thereof and FIG. 5B is an explanatory view showing a method of arranging discharge lines.

FIG. 6 is an explanatory plan view showing another discharge unit.

FIG. 7 is an explanatory plan view showing still another discharge unit.

FIG. 8 is an explanatory plan view showing still another discharge unit.

FIG. 9 is a sectional view schematically showing an air cleaner according to still another embodiment of the present invention.

FIG. 10 is a sectional configuration diagram of a charging unit in an air cleaner according to still another embodiment of the present invention.

FIG. 11 is a perspective view of an air cleaner according to still another embodiment of the present invention, in which a charging unit is partially cut away.

FIG. 12 is a sectional configuration diagram of a charging unit in an air purifier according to still another embodiment of the present invention.

FIG. 13 is a cross-sectional configuration diagram of a charging unit in an air cleaner according to still another embodiment of the present invention.

FIG. 14 is a perspective view of an air purifier according to still another embodiment of the present invention, in which a charging unit is partially cut away.

FIG. 15 is a view showing a charging unit in an air purifier according to still another embodiment of the present invention, wherein FIG. 15 (a) is a perspective view with a part thereof cut away, and FIG. It is sectional drawing.

FIG. 16 is a schematic exploded perspective view of a general air cleaner as a conventional example.

FIG. 17 is a schematic configuration diagram illustrating a charging unit and the like in the air cleaner according to the embodiment.

FIG. 18 is a sectional structural view showing a charging unit according to the third embodiment.

FIG. 19 is a schematic circuit diagram of a charging unit according to the third embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Air cleaner 2 Pre-filter 3 Charging part 4 Dust collecting part 5 Blower part 6 Main body case 10 Charging storage frame 11 Openable and closable side wall 12 Hinge mechanism 13 Guiding groove part 14 Positioning groove part 20 Discharge part 21 Elastic body 22 Guidance Roller 23 Guide mechanism 24 Hinge 25 Fixed part 26 Roll part for winding metal mesh 30 Counter electrode part 31 Opening hole 32 Arc part 33 Insertion piece 34 Bend part 35 Cylindrical part 36 Support shaft 37 Fixing shaft 38 Winding discharge wire Roll part to rotate

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B03C 3/41 B03C 3/41 CZH F24F 7/00 F24F 7/00 A

Claims (15)

[Claims] A charging unit comprising: a discharging unit and a counter electrode unit; and a charging unit configured to charge the dust by discharging from the discharging unit to the counter electrode unit;
In an air purifier provided with a dust collecting portion for collecting charged dust and a blowing means for sending air to the charging portion and the dust collecting portion, the counter electrode portion is a conductive member having a large number of openings for ventilation. An air cleaner comprising a plate, wherein the counter electrode portion is provided on an air inflow side and an air outflow side of the discharge section. 2. An opening formed in the counter electrode on the air inlet side and an opening formed in the counter electrode on the air outlet side so as not to face each other. The air purifier according to 1. 3. An opening formed in the counter electrode on the air inflow side and an opening formed in the counter electrode on the air outflow side facing each other.
An air purifier as described. 4. The device according to claim 1, wherein the counter electrode portion is disposed so as to be substantially equidistant from the discharge portion.
4. The air purifier according to any of 2 or 3. 5. The method according to claim 4, wherein the counter electrode portion is formed in a cross-sectional waveform shape in which a plurality of arc portions are continuously arranged, and the discharge portion is located substantially at the center of each arc portion. An air purifier as described. 6. The air purifier according to claim 4, wherein the counter electrode portion includes a plurality of cylindrical portions arranged continuously, and the discharge portion is located substantially at the center of the cylindrical portion. . 7. The counter electrode portion is formed in a cross-sectional waveform shape in which a plurality of arc portions are continuously arranged, and arc portions near the air inflow side and arc portions near the air outflow side appear alternately. The air purifier according to claim 4, wherein the discharge unit is located substantially at the center of each arc part. 8. A side wall of the charging housing frame having a rectangular frame shape for accommodating the discharge portion and the counter electrode portion is configured to be openable, and the inner wall surfaces located on both sides of the openable side wall include:
The guiding groove portion for guiding a width direction end of the counter electrode portion is provided.
The air purifier according to any one of 5, 6, and 7. 9. The air purifier according to claim 8, wherein a positioning groove for inserting an insertion-side end of the counter electrode portion is provided on an inner surface of the insertion-side side wall of the counter electrode portion of the charging storage frame. Machine. 10. The counter electrode part is made of a metal mesh,
Comprising a plurality of support shafts arranged substantially parallel to the discharge unit,
4. The air cleaner according to claim 1, wherein the counter electrode is supported by the support shaft so as to be located alternately on an air inflow side and an air outflow side of the discharge unit. . 11. The air purifier according to claim 10, wherein one end of the counter electrode portion is fixed, and a free end of the counter electrode portion is wound and fixed in a roll shape. 12. The discharge unit includes a plurality of discharge wires having both ends fixed, and a discharge wire having a central portion fixed to the other end of an elastic body having one end fixed and folded back. The air cleaner according to any one of claims 1 to 11, further comprising a guide mechanism for laying the air cleaner substantially in parallel. 13. The discharge part comprises a discharge wire having both ends fixed, and a discharge wire having a central portion fixed to the other end of an elastic body having one end fixed and folded back. The air cleaner according to any one of claims 1 to 11, further comprising a guide mechanism for laying the air cleaner substantially in parallel. 14. The discharge wire according to claim 12, wherein at least one end of the discharge wire is wound and fixed in a roll shape.
Or the air purifier according to any one of 13. 15. The air purifier according to claim 14, wherein a winding guide mechanism is provided on a fixed end side of the discharge wire.