JPH1157532A - Air cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the soiling of a prescribed part of an outer part by constituting the prescribed part of the outer part with an antistatic resin material. SOLUTION: A back plate 20 is formed with the antistatic resin material having a continuous antistatic performance. A corona discharge is generated between an ionizing ray 16 and dust collecting plates 15a and 15b, and the dust in air is charged in negative and pulled toward the dust collecting plates 15a and 15b by coulomb force. Then the dust is stopped with a dust collecting paper arranged at a front surface side of the dust collecting plates 15a and 15b and the dust is separated from the air and removed. As a result, the dust in the air is collected and the air is purified. At this time, a main body part 10 and a cover 30 is charged by the negative ion generated by the corona discharge. But the back plate 20 is prevented from charging by discharging effectively the charge to the air since the back plate 20 is formed with the antistatic resin material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air purifier, and more particularly to an electrostatic air purifier that charges dust in the air and draws the dust by coulomb force.

[0002]

2. Description of the Related Art Conventionally, an anode, a cathode, and a power supply circuit section are provided, and dust in the air is negatively charged by applying a high DC voltage to the anode and the cathode, and a Coulomb force acting between the anode and the cathode is used. There is an electrostatic air cleaner that absorbs dust.

[0003] Such an electrostatic air purifier includes a main body having an anode, a cathode, and a power supply circuit mounted thereon, and an exterior covering the main body. The main body and the exterior are made of plastic or AB, respectively, for reasons such as securing insulation between the anode and the cathode, reducing the weight and facilitating molding.
It is formed of a synthetic resin such as S resin (acrylonitrile-butadiene-styrene copolymer).

However, plastics and ABS resins have a high insulating property, that is, a low conductivity, so that when they are used for the exterior of an electrostatic air cleaner, a charged state is generated.
Then, when the charged state of the exterior part occurs, there is a problem that dust is collected by the attraction force of the charge, and the surface of the exterior part and its vicinity are soiled.

In particular, in recent years, there has been an increasing demand for air purifiers not only to be placed flat but also to be hung on a wall. In such a case, the sucked dust adheres to the wall near the charged exterior part. Then, there is a possibility that the aesthetic appearance of the air purifier installation part is impaired. In addition, the charged exterior portion may directly contact the wall surface, thereby charging the contact portion of the wall surface and a position in the vicinity thereof, thereby further promoting the contamination of the wall surface.

Therefore, various proposals have conventionally been made in order to prevent contamination near the installation location of the air cleaner due to such charging of the exterior part. For example, Japanese Patent Application No. 6-5
Japanese Patent No. 1318 discloses a main body made of an insulating member having a cathode and an anode arranged on the front side and having a power supply section inward, and a metallic body arranged on the back side of the main body and connected to the power supply section. A wall mounted air purifier with a ground plate is shown.

According to this device, the power supply unit and the ground plate are electrically connected by the ground wire, and the electric charge leaking to the back side of the main body is collected on the ground plate and returned to the power supply unit via the ground wire. It describes that the back side is thereby prevented from being charged and the wall surface is prevented from being stained when used on a wall.

In another conventional example, instead of the above-mentioned ground plate, a conductive copper filler is applied to the inner surface of the back plate of the exterior portion facing and close to the installation wall surface by painting, and the main body portion is coated. Some are connected to the power supply.

According to this technique, the electric charge leaking to the back plate side, that is, to the wall surface side, is collected in the copper filler and returned to the power supply unit, thereby preventing the back plate from being charged. It is described that charging is prevented to prevent dirt near an installation location on a wall surface.

[0010] In this case, the connection between the copper filler coating portion and the power supply portion is made by a ground connection portion having one end connected to the power supply portion and the other end biased so as to always protrude from the main body portion toward the back plate. Is provided in the main body, whereby it is possible to ground the copper filler coated portion on the inner surface of the back plate only by attaching the back plate to the main body.

[0011]

However, in both of the above-mentioned prior arts, grounding is provided on the wall surface side rather than the main body portion, and the electric charge leaking to the back plate side is released, so that the portion which is not desired to be charged is provided. That is, although charging on the wall surface side is prevented, separately providing a member for grounding increases the number of parts and increases the cost. In addition, operations such as installation of a ground plate and copper filler coating have led to an increase in the number of assembly work steps and an increase in manufacturing costs.

For example, in the former case, the connection work between the ground plate and the power supply unit is complicated.
If the power supply unit is provided on the main unit, the ground plate and the power supply unit must be connected via the ground wire, and then the main unit and the back plate must be stacked together so that the ground wire is not interposed between them. However, the arrangement work and the like for that purpose are required, and the cost is increased due to an increase in man-hours.

In the latter case, the unit price of the copper filler is high, and when coating unevenness occurs in the copper filler coating, there is a problem that charging is partially generated. further,
It was difficult to apply a copper filler coating to the outer surface of the back plate for the reason of the aesthetic appearance of the device, and the outer surface of the back plate was easily charged.

Therefore, the method using copper filler coating is not enough to prevent the outer surface of the back plate from directly contacting the wall surface, and there is a risk that the wall surface may be stained by the charging of the outer surface of the back plate. I was In addition, processing such as masking is required to paint only the inner surface of the back plate, and a separate ground connection must be provided, which has the same problem as the former.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and an object of the present invention is to prevent the installation of an air purifier, and furthermore, the contamination of a predetermined portion of an exterior part from occurring, and to reduce the cost. An object of the present invention is to provide an air purifier capable of reducing the amount of air.

[0016]

According to a first aspect of the present invention, there is provided an air purifier, wherein a predetermined portion of an exterior portion is made of an antistatic material. . This prevents charging of a predetermined portion of the exterior part. Therefore, it is possible to prevent charging of a portion that comes into contact with or approaches (hereinafter, simply referred to as “approach”) a predetermined portion caused by charging of the predetermined portion of the exterior portion. As a result, a suction force due to charging is not generated in a predetermined portion of the exterior portion and a portion close to the predetermined portion, so that contamination due to dust collection can be suppressed.

The air purifier according to a second aspect is characterized in that the predetermined portion is a portion which is close to the installation location in the installation state. This prevents electrification of a portion close to the installation location in the installation state. Therefore, it is possible to suppress contamination due to dust collection in a portion adjacent to the installation location.

Note that the installation location refers to a location where the air purifier according to the present invention is installed, for example, a location where the air purifier is in contact with or close to the air purifier when the air purifier is hung on a wall or laid flat. .

According to a third aspect of the present invention, when the installation location is a wall surface, the adjacent portion according to the second aspect is a back plate of the exterior facing the installation wall surface. Features. In general, the exterior part of the air purifier has a back plate formed separately from other parts, so that the structure of the present invention can be easily obtained by forming the back plate itself with an antistatic member. Can be. Thereby, the back plate of the exterior part can be prevented from being charged, and the contamination of the wall surface close to the back plate due to dust collection can be suppressed.

According to a fourth aspect of the present invention, when the installation location is a flat portion, the adjacent portion is a leg portion configured as a part of the exterior portion and installed on the flat portion. I do. Also in this case, the configuration of the present invention is obtained by forming only the legs with an antistatic material, thereby preventing the legs from being charged and suppressing the contamination due to the charging of the flat portion where the legs are in proximity. Can be.

[0021]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is an exploded explanatory view schematically showing an embodiment of the present invention. The air purifier 1 used in the present embodiment is a wall-mounted air purifier used to be hung on a wall. The air purifier 1 includes a main body 10 having a mechanism for generating negative ions, a back plate 20 adjacent to a wall (not shown) which is an installation location on the back side of the main body 10, and a front surface of the main body 10. And a cover 30 that covers the predetermined area.

The main body 10 is formed of an ABS resin having an insulating property, and has a slightly vertically long, substantially rectangular box shape with an opening on the back plate 20 side. Then, the shape is gradually depressed as it moves from the upper portion 11a and the lower portion 11b of the front surface 11 to the central portion of the main body portion 10,
Recessed part 1 whose longitudinal section forms a quadratic curve symmetrical in the vertical direction
2 are provided.

The ionization line base 13 projecting at a predetermined height toward the front side is located at the left and right center portions in the recess 12.
a, 13b are provided to face each other, and an ionization line 14, which is a cathode to which a negative DC high voltage is applied, is provided between the ionization line bases 13a, 13b.

The ionization line 1 in the recess 12 is
4, a dust collecting plate 15 having a predetermined length in the left-right direction and a predetermined width in the height direction
a and 15 b are provided so as to face the cover 30. The dust collecting plates 15a and 15b are provided at vertically symmetric positions about the ionization line 14, and form an anode to which a positive DC high voltage is applied.

The main body 10 is provided with an ionizing wire 14 and dust collecting plates 15a and 15a in a space formed between the main body 10 and the back plate 20.
A power supply unit 16 (not shown) for applying a high DC voltage to the power supply unit b is provided with an adjustment knob 17 for adjusting the voltage applied by the power supply unit 16 in the lower part 11b.

Further, on the upper portion 11a and the lower portion 11b of the front surface 11, there are provided antistatic lines 18a, 18b formed of a metal plate extending in the left-right direction.
The power supply 16 is connected to the ground. This charge removal line 1
8a and 18b are upper parts 1 of the main body part 10 which is a charging member.
It has the function of removing the electrification of 1a and the lower part 11b.

The cover 30 is formed of an ABS resin having the same insulating properties as the main body, and is mounted on the main body 10 to cover the recess 12 from the front side. In the front part 31 of the cover 30, a through hole 32 penetrating from the front side to the back side is continuously formed. The through hole 32 is formed in such a size that a human finger does not enter the recess 12 deeply.

The back plate 20 has a rear surface portion 21 having a planar shape facing the front surface 10 and a main body portion 10 extending from the periphery of the rear surface portion 21.
And a peripheral wall portion 22 standing upright at a predetermined height to the side, and has a substantially rectangular box-like shape forming a U-shaped cross section with the main body portion 10 opened. Then, by engaging with the main body 10, the rear opening of the main body 10 is closed, and the main body 2 is closed.
A predetermined indoor space accommodating the power supply unit 16 is formed in cooperation with the power supply unit 16. In addition, a locking portion (not shown) formed on the back surface of the back plate 20 so as to be able to hang on a wall surface as an installation location is provided.

The back plate 20 having the above-described shape is formed of an antistatic resin material having a sustained antistatic performance. The antistatic resin material used in the present embodiment includes:
ADION®-A is used. This A
DION (registered trademark) -A has an electric resistance of 1 × 1 on the surface.
0 ¹¹ to 1 × 10 ¹³ Ω, which is a normal resin, for example,
Since the surface electric resistance of ABS resin and the like is about 1 × 10 ¹⁶ Ω, it has good conductivity as compared with ordinary resin, and has a property of being rapidly discharged to the atmosphere. doing.

The physical properties are slightly flexible but have a physical property balance close to that of a general ABS resin.
The moldability can be easily formed similarly to the ABS resin. In addition, it can be colored in any color tone and has secondary workability similar to that of ABS resin.

In the air purifier 1 having the above-described configuration, in use, dust collecting paper is placed on the recess 12 and the power supply unit 16 applies, for example, 8000 to the ionization line 16.
A negative high voltage of about volts is applied, and the dust collecting plate 15
A high voltage of about 8000 volts is applied to a and 15b.

Thus, the ionizing wire 16 and the dust collecting plate 15
A corona discharge is generated between the dust collectors 15a and 15b, dust in the air is negatively charged, and is drawn toward the dust collecting plates 15a and 15b by Coulomb force. Then, by being caught by the dust collecting paper disposed on the front side of the dust collecting plates 15a and 15b, the dust collecting plates 15a and 15b are separated from the air and removed.
As a result, dust in the air can be collected, and the air can be cleaned.

At this time, the main body 10 and the cover 30 are charged by negative ions generated by corona discharge. However, the back plate 20 is, as described above,
Since it is formed of an antistatic resin material, it is possible to efficiently discharge charges to the atmosphere and prevent the back plate 20 from being charged.

Therefore, since the entire back plate 20 is prevented from being charged as described above, it is possible to suppress the contamination of the wall surface adjacent to the back plate 20 due to dust. Also,
Dirt on the back plate 20 itself is also suppressed. In addition, since the conventional grounding is not required, the cost can be reduced by reducing the number of parts and the number of working steps.

In the above-described embodiment, the air purifier of the wall-mounted type has been described. However, the air purifier 1 can be applied to the upright type air purifier 1 standing upright on a flat surface. For example, when the air purifier 1 is provided with a leg at the lower part of the main body 10 at a predetermined height from the floor, the leg is formed of the above-described antistatic resin material.

As a result, it is possible to prevent the legs from being charged, to prevent the installation location close to the legs from being soiled by dust, and to prevent the legs themselves from being soiled.

[0038]

As described above, according to the air purifier of the present invention, it is possible to prevent electrification of a predetermined portion of the exterior portion of the air purifier, and to prevent the predetermined portion of the exterior portion and the vicinity of the predetermined portion of the exterior portion. It is possible to suppress contamination of the portion with dust.

[Brief description of the drawings]

FIG. 1 is an exploded explanatory view schematically showing a first embodiment of the present invention. DESCRIPTION OF SYMBOLS 1 Air purifier 10 Main part 20 Back plate 30 Cover

Claims (4)

[Claims] 1. A system comprising: a main body having a cathode to which a negative DC high voltage is applied and an anode to which a positive DC high voltage is applied; and an exterior covering the main body, wherein dust in the air is provided. Is negatively charged by electrons emitted from the cathode,
An electrostatic air cleaner for collecting dust using Coulomb force acting between the anode and the anode, wherein a predetermined portion of the exterior part is made of an antistatic material. 2. The air purifier according to claim 1, wherein the predetermined portion is a portion close to an installation location in an installation state. 3. The air purifier according to claim 2, wherein, when the installation location is a wall surface, the adjacent portion is a back plate of the exterior unit facing the installation wall surface. . 4. The device according to claim 2, wherein, when the installation location is a flat portion, the adjacent portion is a leg configured as a part of the exterior portion and installed on the flat portion. An air purifier according to item 1.