JPH1099717A - Air cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively utilize dust collection paper and to enhance dust collection efficiency by weakening electric discharge at the port where the electric discharge distance is short and the discharge is easily concentrated, so as to avoid concentration of the electric discharge and uniformize the discharge and attracting dust on the whole dust collection paper. SOLUTION: In the air cleaner, high voltage is impressed between an electric discharge line 31 and a counter electrode 32 to generate electric discharge and the outdoor air is sucked from a sucking hole 20 with ionic wind induced by the electric discharge and dust is removed with the dust collection paper 74, then the air is discharged from a discharge hole 72, and a shield part 95 is arranged between the electric discharge line 31 and the counter electrode 32 so as to intercept the shortest electric discharge distance. The shield part 95 is integrated with a trough shaped mounting case 33 with both ends of the electric discharge line 31 engaged and attached to a front cover 19. Thus, the frequency of the maintenance of the dust collection paper can be reduced and also because the mounting case is integrated with the shield part, another part for constituting the shield part is not required.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air purifier for purifying air at home or the like.

[0002]

2. Description of the Related Art In a conventional air purifier, a fan incorporated in a main body is driven to suck outside air from an intake port provided in the main body, pass through a dust collecting portion provided inside to remove dust, and then discharge the air. In addition to the so-called fan-type air purifier that exhausts air from the outlet to the room, without using a fan, a high voltage is applied between the discharge electrode and the counter electrode to generate corona discharge, which is induced by this corona discharge. A so-called ion wind type air purifier that uses ion wind to draw in outside air into the main body, charge dust in the air, remove the dust at a dust collection portion attached to a counter electrode, and then exhaust the air indoors, for example, It is known from Japanese Utility Model Publication No. 2-43495.

In this air purifier, a discharge generated between a discharge wire as a discharge electrode and a counter electrode attached with a dust-collecting paper as a dust collector concentrates on the shortest distance between the two, that is, in the vicinity immediately after the discharge wire. I do. As a result, the dust is concentrated on the central portion of the dust-collecting paper corresponding to the area immediately behind the discharge wire, and the dust is adsorbed, the counter electrode and the central portion of the dust-collecting paper are easily deteriorated, and the entire dust-collecting paper is not effectively used. There is a problem that the dust collection efficiency is poor and that the dust collection paper needs to be replaced and cleaned frequently.

[0004]

SUMMARY OF THE INVENTION The present invention is to prevent the concentration of discharge between a discharge electrode and a counter electrode, to make the discharge uniform, to prevent the counter electrode and the dust collecting portion from being locally deteriorated, It is an object of the present invention to provide an air purifier capable of improving the dust collection efficiency by effectively utilizing the whole for dust collection and reducing the frequency of replacement and cleaning of the dust collection unit.

[0005]

SUMMARY OF THE INVENTION According to the present invention, a discharge is generated by applying a high voltage between a discharge electrode and a counter electrode provided in a main body, and ion discharge is generated by the discharge to generate an ion wind. Charges the dust in the outside air that has been sucked, removes the dust at the dust collection part attached to the counter electrode, and then exhausts the dust.
A shield is provided between the discharge electrode and the counter electrode to block the shortest discharge distance between them.

[0006] With this configuration, the discharge at a portion where the discharge is likely to concentrate on a short discharge distance is blocked by the shielding portion, so that the concentration of the discharge can be avoided and uniformized.

When the discharge electrode is a discharge wire, both ends of the discharge wire are engaged with a mounting case attached to the main body, and the shielding portion is integrally formed with the mounting case. No parts are required. For example, the mounting case has a gutter shape, discharge wires are attached to both ends of the gutter, and a surface corresponding to the bottom of the gutter is a shielding portion.

Further, if the height of the side wall corresponding to the side surface of the gutter of the mounting case is made uneven, the side wall also acts as a shielding portion, and this shielding portion strengthens the shielding (a convex portion).
And a portion (recessed portion) where the shielding is weakened is formed alternately, so that the intensity of the discharge between the discharge line and the counter electrode is made depending on the position, and as a result, the discharge can be more uniform.

[0009]

An embodiment of the present invention will be described with reference to the drawings.
Reference numeral 1 denotes an air purifier main body case, a front case 2 and a rear case 3
It consists of. At the upper center of the front case 2, a decorative board 4 is mounted. Reference numeral 5 denotes a middle frame mounted so as to partition the inside of the main body case 1 back and forth, and an electric motor 6 is mounted at the center of the middle frame 5. A vent hole 7 is provided in the middle frame 5 around the electric motor 6. A fan 8 rotated by a motor 6 is provided in a space behind the middle frame 5 in the main body case.

In the middle frame 5 and the rear case 3, a peripheral wall 10 of a spiral fan case 9 surrounding the fan 8 is formed. The upper part of the fan case 9 is opened to serve as a discharge port, and the lattice-shaped second exhaust holes 11 provided in the rear case 3 are provided.
Is in communication with (The first exhaust hole will be described later.) A second dust collector 12 is accommodated in a space in front of the middle frame 5 in the main body case (the first dust collector is described later). 2nd dust collector
Numeral 12 includes a so-called electret filter 13 formed into a bellows-like electret and a deodorizing filter 14 made of activated carbon. Both filters 13 and 14 are surrounded by a frame 15 and integrated. Reference numeral 16 denotes a claw that presses the second dust collecting portion 12 so as not to come off from the inside of the frame 15. The second dust collecting portion 12 can be taken out from an outlet 17 (see FIG. 4) formed on the side surface of the front case 2. Reference numeral 18 denotes a handle formed on the frame 15 for taking out.

The front of the front case 2 is covered with a front cover 19. The outer casing of the main body of the air purifier includes a main body case 1 and a front cover 19. As shown in FIG. 3, the front cover 19 has a plurality of vertically elongated slit-shaped first intake holes 20 formed therein. To attach the front cover 19 to the front case 2,
A pair of projecting pieces 21 projecting from the lower end of the front case 19 are engaged with a pair of receiving parts 22 formed at the lower end of the front case 2 (see FIG. 1), and a pair of projecting pieces 21 formed on the left and right of the upper part of the front case 2 are formed. Lock hole 23 (Fig. 14
), A pair of claws attached to the upper left and right of the front cover 19.
24 is engaged.

This will be described with reference to FIG. A slide plate storage box 26 having a through hole 25 on the back side of the front cover 19 is
27, and a slide plate 28
The slide plate 28 is slidably mounted to the left and right. The slide plate 28 is provided with the claw 24 protruding from the through hole 25. The slide plate 28 is always outwardly moved by a spring 30, that is, the claw 24 is engaged with the locking hole 23. It is urged in the direction to match. Then, when the pressing portion 29 formed at the end of the slide plate 28 is pressed inward against the spring 30, the engagement between the claw 24 and the locking hole 23 is released,
The front cover 19 can be removed from the front case 2 and the holding part
When you release your hand from 29, the claw 24 and the locking hole are activated by the force of the spring 30.
23 engage. In this way, the front cover 19 is moved to the front case 2
It can be more easily attached and detached.

The front cover 19 and the front case 2 are provided with a discharge wire 31 serving as a discharge electrode and a counter electrode 32, respectively. A negative high voltage is applied to the discharge wire 31, and a positive high voltage is applied to the counter electrode 32. By applying a voltage (may be grounded), the discharge wire 31 and the counter electrode
An ion wind generating section is configured to generate a discharge between the 32 and induce an ion wind by the discharge.

Hereinafter, the ion wind generator will be described. The discharge wire 31 is attached to a gutter-like discharge wire attachment case 33 made of synthetic resin as shown in FIG. The mounting case 33 is detachably mounted in the vertical direction at the center of the rear side of the front cover 19 as described later. At the upper end of the mounting case 33, a metal terminal plate 34 as shown in FIGS. 7 and 9 is mounted. The terminal plate 34 is press-fitted into a hole 35 formed in the mounting case 33 from the direction of the arrow in FIGS. 7 and 9, and is engaged and held at the upper end of the mounting case 33 by its elasticity.

On the other hand, at the lower end of the mounting case 33, FIG.
A U-shaped elastic piece 36 as shown in FIG. 1 is integrally formed, and a U-shaped metal reinforcing plate 37 is mounted along the inside of the elastic piece 36. The reinforcing plate 37 has one end 38 attached to the mounting case 33.
8 by rotating in the direction of the arrow in FIG. 8 with the one end 38 as a fulcrum.
A hole 40 provided in 37 engages with a claw 41 provided in the elastic piece 36 and is mounted along the elastic piece 36. In this mounting state, the elastic pieces 36 are reinforced and adjusted so that the elasticity of the elastic pieces 36 becomes rigid.

The terminal plate 34 and the reinforcing plate 37 have key-shaped claws, respectively.
The two ends of the discharge wire 31 are engaged with the claws 42 and 43 via springs 44. The discharge wire 31 is given an appropriate tension by a spring 44. If the spring 44 is directly engaged with the mounting case 33 made of synthetic resin, the engaging portion may be deformed due to long-term use due to the tension of the spring 44. Since it is attached to the plate 37, it is possible to prevent deformation of the attachment part due to long-term use.

Next, a method for mounting the mounting case 33 to which the discharge wire 31 is mounted on the front cover 19 which is a part of the main body will be described. Protrusions 45 and 46 are formed on the upper and lower portions of the center of the rear surface of the front cover 19 toward the inside, respectively. One engagement hole 47 is formed in the upper protrusion 45 and two engagement holes 47 are formed in the lower protrusion 46. Two engagement holes 48 are formed. One protrusion 49 is provided at the upper end of the mounting case 33, and two claws 50 are formed on the lower surface of the elastic piece 36 at the lower end of the mounting case. Then, with the surface 95 corresponding to the bottom of the gutter of the gutter-shaped mounting case 33 facing the front cover 19, the protrusion 49 is inserted from below into the engagement hole 47 as shown in FIG. By pushing the elastic piece 36 as shown by the arrow in FIG. 12, the claw 50 is engaged with the engaging hole 48 with the elastic force of the elastic piece 36, and the mounting case 33 is attached to the front cover 19. Can be. 51 and 52 are guide pieces integrally formed from both sides of the projecting pieces 45 and 46, respectively, and serve as guides when the projecting part 49 is inserted into the engaging hole 47 and when the elastic piece 36 is pushed.

Since the elastic piece 36 is reinforced by the reinforcing plate 37, the elastic piece 36 does not lose its elasticity even if the mounting case 33 is attached to and detached from the front cover 19 many times. The engagement hole 48
, The mounting case 33 can be securely mounted on the front cover 19.

At the lower end of the mounting case 33, an operation piece 54 for operating a first safety switch 53 inserted in a circuit for operating a high voltage generator 80 described later for supplying a high voltage to the discharge wire 31. Are formed integrally (see FIGS. 10, 13, and 15). With this operation piece 54, the mounting case 33 is
When the front cover 19 is mounted on the front case 2 with the front cover 19 mounted, the first safety switch 53 is closed, the high voltage generator 80 is operated, and the front cover 19 is removed from the front case 2. , The first safety switch 53 is opened and the high voltage generator 80 is opened.
To stop the operation.

By the way, on the back surface of the front cover 19, a pre-filter 55 for removing in advance the dust of the air sucked through the first slit-shaped intake hole 20 is mounted. 33 cannot be attached to the front cover 19. Hereinafter, the structure of this point will be described.

As shown in FIG. 2 and FIG. 13, the pre-filter 55 is divided into two parts on the left and right sides, and like the front cover 19, a synthetic resin frame 57 having a number of vertically elongated slits 56 and a It is composed of a synthetic resin net 58 (see FIG. 17) integrally formed with the body 57. With these two pre-filters 55, the front cover 19
Of the first air intake hole 20 is covered. On the back surface of the front cover 19, a wall 59 extending toward the front case 2 is integrally formed on the left and right sides so as to surround the outside of the first air intake hole 20, and the left and right pre-filter frame members 57 are formed on the wall 59. A through-hole 61 for receiving an engagement piece 60 protruding from the outside of each is formed. (See FIG. 2) Pre-filter fixing plates 62 are fixed to the upper and lower two places at the center of the rear surface of the front cover 19 with screws 63. A pair of fixing pieces 64 protrude from the fixing plate 62 as shown in FIGS.
The fixing piece 64 is formed with a through hole 66 for inserting a claw 65 protruding inside each of the left and right pre-filter frames 57.
The fixing plate 62 is made of a synthetic resin, and the pair of fixing pieces 64 have elasticity in a direction approaching or moving away from each other.

Therefore, by inserting the engaging piece 60 provided on the outside of the pre-filter frame 57 into the through hole 61 and inserting the claw 65 projecting inward into the through hole 65 of the fixing piece 64, The pre-filter 55 is attached to the front cover 19, at this time, as shown in FIG.
The distance between the pair of fixing pieces 64 is reduced as shown in FIG. This is the figure
A fixing piece 64 with a wider root portion 67 of the nail 65 as in 19
By pressing them so that they are close to each other. In this state, when the mounting case 33 approaches the front cover 19 in an attempt to mount it on the front cover 19 as described above, the fixing piece 64 is located in the gutter of the gutter-shaped mounting case 33 as shown in FIG.
The mounting case 33 can be attached to the predetermined position of the front cover 19 without being disturbed by the fixing piece 64.

However, when the pre-filter 55 is not mounted on the front cover 19, the interval between the pair of fixing pieces 64 is widened as shown in FIG. Therefore, even if the mounting case 33 is to be mounted on the front cover 19 in this state, the side wall 68 corresponding to the side surface of the gutter of the gutter-shaped mounting case 33 hits the tip of the fixing piece 64 as shown in the figure, and the fixing piece 64 The mounting case 33 cannot be mounted at a predetermined position of the front cover 19 because it is in the way.

As described above, the mounting case 33 cannot be mounted on the front cover 19 unless the pre-filter 55 is mounted.
When a high voltage is applied between the electrode and the counter electrode 32 to discharge the battery, the pre-filter 55 must be attached and the first intake hole of the front cover 19 must be attached.
By removing the dust, insects, and the like contained in the outside air sucked from the pre-filter 55 by the pre-filter 55, the dust adheres to the discharge wire 31 or the counter electrode 32, which may lower the discharge efficiency or cause abnormal discharge. This is to prevent it.

By the way, the side wall 68 corresponding to the side surface forming the gutter of the gutter-shaped mounting case 33 is uneven (in this case, wavy) as shown in FIG. This is to make the discharge between the discharge line 31 and the counter electrode 32 uniform rather than being concentrated on a part. This will be described later.

While the above description has been made on the discharge wire side of the ion wind generator, the counter electrode side will now be described. A rectangular metal counter electrode 32 is mounted on the front case 2 so as to face the slit 20 of the front cover 19. At the upper end of the counter electrode 32, a contact piece 70 which is inserted into the front case 2 and to which a positive high voltage is applied is bent as shown in FIG. A rib 71 protrudes from the front case 2 so as to surround the counter electrode 32, and a wall 59 protruding from the front cover 19 as shown in FIG. In this wall 59, a number of horizontally elongated slit-shaped first exhaust holes 72 are formed (see FIGS. 2 and 4). Outside the ribs 72 of the front case 2, a number of horizontally long slit-shaped second intake holes 73 are formed.

The counter electrode 32 has a first electrically insulating material.
Dust collection paper 74 serving as a dust collection unit is attached. This dust paper 74
Is similar to kitchen paper. The dust collecting paper 74 is pressed by pressing plates 75, 75 above and below the dust collecting paper 74 so as not to come off from the counter electrode 32. As shown in FIG. 23, the holding plate 75 is rotatable by pivotally supporting a shaft 76 projecting from both left and right ends thereof on a bearing 77 provided on the rib 71. In addition, a spring 78 wound around the shaft 76 constantly urges the dust-collecting paper 74 in a direction in which the dust-collecting paper 74 is pressed against the counter electrode 32. By rotating the pressing plate 75 against the urging force, the dust collecting paper 74 can be removed from the counter electrode 32 and replaced.

Above the counter electrode 32 of the front case 2, a high voltage terminal 81 to which a negative high voltage is supplied from a high voltage generator 80 is provided (see FIGS. 14 and 16). When the front cover 19 with the mounting case 33 is mounted on the front case 2, the discharge wire 31
1 and 16, the terminal plate 34 connected to the high voltage terminal 81 applies a negative high voltage to the discharge wire 31. The positive high voltage from the high voltage generator 80 is supplied to the contact piece 70 of the counter electrode 32.

Incidentally, the negative high voltage terminal 81 and the contact piece 70 to which the positive high voltage is supplied are covered by a protective cover 84 mounted on the back surface of the front case 2 as shown in FIG. Both 81 and 70 are separated by a partition 85 integrally formed with 84. This is because if not covered with the protective cover 84, dust adheres to the high-voltage terminal 81 and the contact piece 70, or dust invades between the two, and due to the influence of the adhering or invading dust and the like, both
Although there is a possibility that a discharge may occur between 81 and 70, such a discharge is prevented by covering with a cover 84 so that dust does not adhere or enter between them.
Even if a small amount of dust adheres or enters, the creepage distance between the two 81 and 70 is increased by partitioning the partition wall 85 so that electric discharge does not easily occur.

The cover 84 not only prevents the discharge between the high-voltage terminal 81 and the contact piece 70 as described above, but also has an upper portion 86 bulging inward as shown in FIG. The contact with the body 15 also serves as a guide when the second dust collecting portion 12 is taken in and out of the outlet 17.

The first safety switch 53 is provided below the front case 2, and is operated by the operation piece 54 projecting from the lower end of the mounting case 33 as described above. Further, a second safety switch 83 operated by an operation piece 82 protruding from an upper portion of the rear surface of the front cover 19 is provided on an upper portion of the front case 2 (see FIG. 16). This safety switch 83 is for turning off all power when the front cover 19 is removed from the front case 2.

FIG. 20 shows an electric circuit diagram. An energizing circuit 89 from the power plug 87 to the motor 6 via the second safety switch 83 and the main switch 88 and an energizing circuit 90 to the high voltage generator 80 are connected in parallel. The fan operation switch 91 is connected to the power supply circuit 89 to the motor, and the power supply circuit to the high-voltage generator is connected.
90 has an ion operation switch 92 and the first safety switch
53 are inserted respectively. The main switch 88, the fan operation switch 91 and the ion operation switch 92 are connected to the front case 2
It is provided on an operation panel 93 provided on the upper surface.

Next, the operation will be described. When the main switch 88 is turned on and the ion operation switch 92 is turned on, the high voltage generator 80 operates, and a negative high voltage, for example, -7K
V, and a high positive voltage, for example, +
A voltage of 7 KV is applied. On the other hand, the electric motor 6 is not energized,
The fan 8 does not rotate.

As a result, a corona discharge is generated between the discharge wire 31 and the counter electrode 32 to generate ion wind. Outside air is sucked from the first air intake hole 20 of the front cover 19 by the ion wind, and the dust contained in the sucked air comes into contact with gas ions and electrons generated by the discharge, and is negatively charged, so that the high potential is opposed. The charged dust moves toward the electrode 32 and adheres to the dust collecting paper 74 attached to the counter electrode 32. The air from which dust has been removed is supplied to the large number of horizontally elongated slit-shaped first exhaust holes 72.
More released. In FIG. 2, arrow A indicates the flow of air at this time.

Here, the discharge wire 31, the counter electrode 32, the dust collecting paper 7
4. An ion wind type air purifying means for sucking outside air by ion wind with a front cover 19 or the like to remove dust in a dust collecting section and then exhausting the dust. In this case, since the amount of ventilation is only induced by the ionic wind, the amount of ventilation is small, and the dust collecting ability is inferior. However, the room air can be kept clean without feeling the noise due to the rotation of the fan 8 or the cold caused by the ventilation. . Therefore, the operation is suitable when the air is slightly contaminated or when the temperature is low.

Next, the fan operation switch 91 on the operation panel 93
, The high voltage generator 80 does not operate, and no high voltage is applied to the discharge wire 31 or the counter electrode 32. On the other hand, the electric motor 6 is energized and the fan 8 rotates. As a result, the suction of the air by the ion wind disappears, and instead, the arrow B in FIG.
As described above, the outside air is sucked from between the front cover 19 and the front case 2 through the large number of horizontally long slit-shaped second air intake holes 73, passes through the second dust collecting section 12, and forms the fan casing 9. The air is exhausted into the room through the second exhaust hole 11 through the inside. In this process, the dust contained in the sucked air is removed by the second dust collecting section.
Captured at 12 and purified.

In this case, a fan-type air purifying means is constituted by the second dust collecting portion 12, the fan 8, the electric motor 6, and the like, and the fan-type air purifying means is operated to forcibly circulate the indoor air by the fan. As a result, a large amount of circulating air is obtained, so that dust can be efficiently removed by the second dust collecting section 12. Therefore, this operation is suitable when the air in the room is dirty or when the air in a large room is purified.

Further, in this case, a large amount of air is guided to the back side of the front case 2 through the second intake hole 73, and dust tends to adhere to the negative high-voltage terminal 81 and the positive contact piece 70 there. Since these are covered with the cover 84 as described above, intrusion and adhesion of dust are prevented.

As described above, the ion operation and the fan operation can be appropriately selected, and a desired operation can be performed according to the degree, size, temperature, and the like of the contamination of the room. If the ion operation switch 92 and the fan operation switch 91 are closed at the same time, the ion operation and the fan operation can be performed simultaneously.

As can be seen from the circuit diagram of FIG. 20, when the front cover 19 is mounted on the front case 2 with the mounting case 33 removed from the front cover 19, the first safety switch 53 is closed. And the high voltage generator 80 does not operate, but the second
Since the safety switch 83 is closed by the operation piece 82, the electric motor 6
Thereby, the fan 8 can be rotated. In other words, the ion-air-type air purification means cannot be operated, but the fan operation can be performed by operating the fan-type air purification means. Therefore, even if the mounting case 33 cannot be mounted because the mounting case 33 is forgotten or lost or the discharge wire 31 is broken, the air can be cleaned by operating the fan-type air purifying means at least. Can be

The maintenance of the dust collecting paper 74 and the discharge wire 31 is performed as follows. When replacing the dust collecting paper 74,
19 is removed from the front case 2, but if the front cover 19 is removed, the discharge wire 31 will also be attached, so when replacing the dust collection paper 74, the discharge wire 31 will not be in the way, It's easy to do. On the other hand, a terminal plate 34 and a high-voltage terminal
No negative high voltage is supplied since the contact with contact 81 is released, so it is safe to touch the discharge wire. Also, by removing the front cover 19, the second safety switch 83 and the first safety switch 53 can be removed. Is opened to stop the operation of the high-voltage generator 80, so that a positive high voltage is not applied to the counter electrode 32, and the dust collection paper 74 can be safely replaced.

Also, dust adheres to the discharge wire 31 and the mounting case 33, which necessitates cleaning. However, the mounting case 33 lifts the elastic piece 36 upward and removes the claw 50 from the engaging hole 48. The discharge wire 31 can be easily removed from the mounting case 33 by removing the spring 44 from the key-shaped claws 42, 43 of the terminal plate 34 and the reinforcing plate 37. The cleaning of the source 33 can also be easily performed.

By the way, if there is nothing between the discharge line 31 and the counter electrode 32 when the ion-air type air purifying means is operated, the discharge generated between the discharge line 31 and the counter electrode 32 Is concentrated at the shortest discharge distance, that is, concentrated at the central portion of the counter electrode 32, and as a result, the dust is concentrated at the central portion of the dust collecting paper 74 and the dust is adsorbed, and the central portion of the counter electrode 32 and the dust collecting paper 74 is easily deteriorated. In addition, there is a problem that the entire dust collecting paper is not effectively used and the dust collecting efficiency is low.

In order to solve this problem, a discharge wire
The gutter-shaped mounting case 33 to which the gutter 31 is attached is mounted on the front cover 19 such that the surface 95 corresponding to the bottom of the gutter is located at a position where the shortest discharge distance between the discharge wire 31 and the counter electrode 32 is interrupted. . That is, the surface 95 serves as a shielding portion for shielding the shortest discharge distance between the discharge line 31 and the counter electrode 32. As shown in FIG. 6, the side walls 68 corresponding to both sides of the shielding portion 95, that is, the side surfaces of the gutter, are formed in an uneven shape (wavy shape).
I have to.

With such a configuration, the discharge line 31 having a short discharge distance where the discharge is likely to concentrate is blocked by the shielding portion 95, so that the concentration of the discharge is avoided and the discharge is made uniform. In addition, the side wall 68 also functions as a shielding part due to the uneven side wall 68, and the shielding part alternately forms a part (a convex part) that strengthens the shielding and a part (a concave part) that weakens the shielding. Depending on the position, the intensity of the discharge between the discharge wire 31 and the opposing electrode 32 is increased, and as a result, the electric discharge is diffused throughout the opposing electrode 32 to cause the electric discharge, thereby making the electric discharge more uniform.

FIG. 21 shows the state of the discharge, and the pre-filter 55 and the pre-filter fixing plate 62 are removed for easy understanding. In the figure, arrow A indicates the state of discharge, and arrow B
Indicates the state of the outside air sucked by the ion wind.

As a result, the dust is attracted to the entire dust collecting paper 74, so that the dust collecting paper can be effectively used, the dust collecting efficiency can be improved, and the number of times of replacing the dust collecting paper 74 can be reduced. Further, it is possible to reduce the concentration deterioration of the central portion of the counter electrode 32 and the dust collecting paper 74.

This can be applied not only to the case where the outside air is sucked from the intake hole 20 only by the ion wind, but also to the case where the fan is rotated to forcibly suck the air in addition to the ion wind. Further, the present invention is also applicable to an air purifier in which the outside air is mainly sucked by a fan, and the ionic wind is mainly used to charge the sucked outside air.

In the above embodiment, the unevenness of the side wall 68 is provided at a constant interval or size. However, the size or interval of the unevenness may be varied. Also, the unevenness may be squared without being wavy.

Also, an example of a discharge wire as the discharge electrode has been described.
Also in the case of a needle-shaped discharge electrode, by providing a shielding portion so as to block the shortest discharge distance from the counter electrode, the concentration of discharge can be prevented and dispersed.

[0051]

According to the present invention (the first aspect of the present invention), a shielding portion is provided between the discharge electrode and the counter electrode to block the shortest discharge distance between the discharge electrode and the counter electrode. It is possible to weaken the discharge at a portion to avoid concentration of the discharge and to make the discharge uniform. As a result, the dust is attracted to the entire dust collecting portion, the dust collecting portion can be effectively used, the dust collecting efficiency can be improved, and the frequency of maintenance of the dust collecting portion can be reduced. Further, local deterioration of the counter electrode and the dust collecting portion can be prevented.

In particular, when the discharge electrode is a discharge wire, both ends of the discharge wire are engaged with a mounting case mounted on the main body, and the shielding portion is integrally formed with the mounting case. Do not need.

Further, if the height of the side wall corresponding to the side surface of the gutter of the mounting case is made uneven, the side wall also functions as a shielding portion, and this shielding portion strengthens the shielding (a convex portion).
And a portion (recessed portion) where the shielding is weakened is formed alternately, so that the intensity of the discharge between the discharge line and the counter electrode is made depending on the position, and as a result, the discharge can be more uniform.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing the entire air purifier of the present invention.

FIG. 2 is a cross-sectional view showing the entire air cleaner.

FIG. 3 is a front view showing the entire air purifier.

FIG. 4 is a right side view of the entire air purifier.

FIG. 5 is a plan view of the entire air cleaner.

FIG. 6 is a longitudinal sectional view showing a mounting case of the air cleaner to which a discharge wire is mounted.

FIG. 7 is an exploded vertical sectional view of an upper portion of a mounting case and a terminal plate of the air purifier.

FIG. 8 is an exploded vertical sectional view of a lower portion of a mounting case and a reinforcing plate of the air purifier.

FIG. 9 is an exploded perspective view of an upper part of a mounting case and a terminal plate of the air purifier.

FIG. 10 is an exploded perspective view of a lower portion of a mounting case and a reinforcing plate of the air purifier.

FIG. 11 is an enlarged vertical sectional view showing a state where the upper part of a mounting case of the air purifier is mounted.

FIG. 12 is an enlarged vertical cross-sectional view showing a state in which a lower part of a mounting case of the air purifier is mounted.

FIG. 13 is a rear view showing a pre-filter by a broken line on the back side of a front cover of the air purifier.

FIG. 14 is a front view of the main body case in a state where a front cover of the air purifier is removed.

FIG. 15 is a sectional view taken along line AA of FIG. 14 when the front cover is mounted.

FIG. 16 is a sectional view taken along line BB of FIG. 14 when the front cover is mounted.

FIG. 17 is an enlarged cross-sectional view showing a relationship between a pre-filter mounted on a front cover and a mounting case.

FIG. 18 is an enlarged cross-sectional view showing a state where a pre-filter of the same relation is removed.

FIG. 19 is a sectional view taken along line AA of FIG. 17;

FIG. 20 is an electric circuit diagram of the air purifier of the present invention.

FIG. 21 is a cross-sectional view showing a state of discharge of a discharge line and a counter electrode of the air purifier.

FIG. 22 is a cross-sectional view showing a portion where the front cover is attached to the front case based on the line AA in FIG. 3;

FIG. 23 is an enlarged view of the inside of a circle C of FIG. 14 showing a state of mounting dust collection paper of the air purifier of the present invention.

[Description of Signs] 1 Body case 19 Front cover 31 Discharge wire (discharge electrode) 32 Counter electrode 20 First intake hole 74 Dust collecting paper (Dust collection part) 72 First exhaust hole 95 Shielding part 33 Mounting case 68 Side wall

Claims (4)

[Claims] 1. A discharge is generated by applying a high voltage between a discharge electrode and a counter electrode provided in a main body, and ion discharge is generated by the discharge to charge dust in the outside air sucked from an intake hole. An air purifier comprising: a dust collecting unit attached to the counter electrode for removing dust and exhausting the dust, wherein a shielding unit for blocking a shortest discharge distance between the discharge electrode and the counter electrode is provided. 2. The air purifier according to claim 1, wherein the discharge electrode is a discharge wire, and both ends of the discharge wire are engaged with a mounting case mounted on a main body, and the shield is integrally formed with the mounting case. Machine. 3. The air purifier according to claim 2, wherein the mounting case has a gutter shape, the discharge wires are attached to both ends of the gutter-shaped mounting case, and a surface corresponding to a bottom of the gutter is the shielding portion. Machine. 4. The air purifier according to claim 3, wherein the height of the side wall corresponding to the side surface of the gutter of the mounting case is made uneven.