JPH06254439A - Air cleaner - Google Patents

Abstract

PURPOSE:To make a main body case and peripheral wall faces hard to be stained and manufacture the main body case inexpensively. CONSTITUTION:A main body case 1 and wall faces on which the main body case is installed are protected from being stained by coating the surface of the main body case 1 with a conductive coating material 6 such as metal oxide and releasing the surface plus charge generated by a primary charge section 3 in the main body case 1. Also the main body case 1 and the wall faces are prevented from being soiled by making conductive synthetic resin contained in a synthetic resin material for the main body case 1, and the main body case can be manufactured inexpensively by eliminating the coating process.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a commercial or domestic air cleaner.

[0002]

2. Description of the Related Art In recent years, wall-mounted air cleaners have been widely used.

Conventionally, this type of air cleaner has a structure as shown in FIG. As shown in the figure, the blades 101 for blowing air,
The drive motor 102 and the rear case 103 that forms the outer contour of the main body form a casing 105 together with the front case 104. An electrostatic filter 106 that removes dust in the air is attached to the suction side of the casing 105, and a desorption filter 107 that removes odors is attached to the downstream side thereof.

The blowout grill 109 is arranged on the blowout side of the casing 105, and the metal fitting 110 attached to the casing 105 engages with the metal fitting 112 attached to the wall surface 111 to fix the air cleaner to the wall surface 111. Further, the front grill 108 has a preliminary charging portion 113, and has a structure in which a plurality of fitting claws 114 and 115 provided on the upper and lower portions are respectively engaged with and held by the ends of the front case 104.

In the above structure, dust in the air is sucked from the front grill 108 by the blades 101 for blowing and the driving motor 102, is positively charged by the preliminary charging unit 113, and is collected by the electrostatic filter 106.
Further, the air purifier has a metal fitting 112 attached to a wall surface 111.
It is often used by hanging on the wall by engaging with the metal fitting 110 attached to the casing 105.

[0006]

In such a conventional structure, since a high voltage is applied to the pre-charging portion, the main body case and the attached wall have a positive potential, and only the main body case is used during a long period of use. Not only that, but also the wall surface around the main body case has a problem in that dust having a negative potential is attached and contaminated.

Further, in the case of taking measures such as surface treatment so that the surface of the main body does not become dirty, there is a problem that the manufacturing cost becomes high.

SUMMARY OF THE INVENTION The first object of the present invention is to provide an electric air cleaner having a structure in which the main body case and the wall surface around the main body case are not easily contaminated.

The second object is to prevent the main body case and the wall surface around the main body case from becoming dirty at a lower manufacturing cost.

[0010]

The first means for achieving the first object of the present invention is a pre-charging portion to which a high voltage is applied and a dust collecting member provided on the downstream side of the pre-charging portion. And a main body case containing the pre-charging portion and the dust collecting portion, and the surface of the main body case is coated with a conductive paint.

A second means for achieving the second object is a preliminary charging section to which a high voltage is applied, a dust collecting section provided on the downstream side of the preliminary charging section, and the preliminary charging section. And a main body case having a built-in dust collecting portion, and the main body case is formed of a synthetic resin containing a conductive resin.

[0012]

According to the present invention, by the construction of the above-mentioned first means, the resin surface of the main body case is charged with a positive potential of 2 to 3 kV by the high-voltage electric charge supplied to the preliminary charging portion in the electric air cleaner, Negatively charged dust easily adheres, but the positive charge on the main body surface can be escaped by the conductive paint applied to the main body case surface, and the positive potential on the wall surface around the main body is also lowered, so that negatively charged dust And to prevent it from sticking to the wall.

In addition, with the structure of the second means, by adding a conductive resin to the resin of the main body case, the positive potential of the surface and the wall surface of the main body is lowered to prevent the main body case and the wall from being contaminated. The case painting process can be omitted.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIG.

As shown in the figure, in order to charge the dust sucked from the suction port 2 into the air cleaner body case 1, a pre-charging portion 3 to which a high voltage is applied and a downstream side of the pre-charging portion 3 are provided. It has a dust collecting part 4 for collecting the charged dust, and a blowing device 5 for ventilating the preliminary charging part 3 and the dust collecting part 4. The surface of the body case 1 is coated with a conductive paint 6.

The operation of the above structure will be described. The dust in the room is sucked from the suction port 2 by the air blower 5 and passes through the discharge line applied to about +7 kV and the preliminary charging section 3 which is composed of the counter electrode plate grounded to earth. At that time, it is positively charged by the corona discharge and is collected in the dust collecting part 4 which is grounded. At this time, since a high voltage is applied to the pre-charging portion 3, when the main body case 1 is made of a non-conductive material such as synthetic resin, its electric resistance value is about 10 ¹⁴ Ω and the surface of the synthetic resin is at a positive potential. Dust that is charged and that has a negative charge floating in the air adheres to it, and if the main body case is hung on a wall, that wall also has a positive potential,
Negatively charged dust in the air easily sticks to the wall surface,
Compared to mechanical air purifiers, the main body and walls are much easier to get dirty.

However, since the surface of the main body case 1 is coated with the conductive paint 6 containing a metal oxide as a conductive material, the electric resistance value of the surface of the main body case 1 is 10 ¹² -1.
It becomes 0 ¹⁴ Ω, and the positive potential from the preliminary charging section 3 can be escaped, and dust is less likely to adhere to the main body case 1.
Along with this, the positive potential of the wall is also greatly reduced, and it is possible to prevent negative dust from adhering to the wall surface.

As described above, according to the air cleaner of the first embodiment of the present invention, by coating the surface of the synthetic resin main body case 1 with the conductive paint 6, the main body case 1 is prevented from being positively charged. The main body case and the wall can be prevented from becoming dirty.

Next, a second embodiment of the present invention will be described with reference to FIG. The same components as those in the first embodiment are designated by the same reference numerals, and detailed description will be omitted.

The body case 7 of the air purifier is molded of synthetic resin containing conductive resin. A pre-charging unit 3 to which a high voltage is applied to charge the dust sucked from the suction port 2 of the main body case 7, and a dust collecting unit provided downstream of the pre-charging unit 3 for collecting the charged dust. 4 and a blowing device 5 for ventilating the preliminary charging section 3 and the dust collecting section 4.

In the above structure, when a high voltage is applied to the preliminary charging section 3, the main body case itself is easily charged,
By incorporating a conductive synthetic resin (a metal oxide such as zinc oxide) into the synthetic resin material of the main body case, the surface resistance value can be lowered to 10 ¹² to 10 ¹³ Ω, and the precharge portion 3
When the high voltage is generated, the static voltage on the surface of the main body case 1 can be suppressed to 0.2 kV or less. Therefore, the main body case 7 can be prevented from being positively charged and the main body case and the wall can be prevented from being soiled.

Further, since it is not necessary to perform post-treatment such as painting on the body case, the manufacturing process can be reduced and the cost of parts can be reduced.

As described above, according to the air cleaner of the second embodiment of the present invention, since the synthetic resin material of the main body case contains the conductive synthetic resin, the main body case and the wall can be prevented from being soiled. It can be manufactured at low cost by eliminating the painting process in the manufacturing process.

[0024]

As is apparent from the above embodiments, according to the present invention, the surface of the main body case made of synthetic resin is coated with a conductive paint, and the resin itself of the main body case is made conductive. Thus, it is possible to provide an air purifier having an effect that the main body case can be prevented from being charged, and as a result, the main body case and the wall can be prevented from becoming dirty. In addition, by incorporating a conductive synthetic resin into the synthetic resin material of the main body case, the main body case can be made conductive without a painting step in the manufacturing process.
It is possible to provide an effective air purifier that can be manufactured at low cost.

[Brief description of drawings]

FIG. 1 is a sectional view of an air cleaner according to a first embodiment of the present invention.

FIG. 2 is a sectional view of the air cleaner of the second embodiment.

FIG. 3 is a sectional view of a conventional air cleaner.

[Explanation of symbols]

 1 Main body case 3 Preliminary charging part 4 Dust collecting part 6 Conductive paint 7 Main body case

Claims (2)

[Claims] 1. A main body having a preliminary charging section to which a high voltage is applied, a dust collecting section provided on the downstream side of the preliminary charging section, and a main body case containing the preliminary charging section and the dust collecting section. An air purifier whose surface is coated with conductive paint. 2. A pre-charging unit to which a high voltage is applied, a dust collecting unit provided on the downstream side of the pre-charging unit, and a main body case containing the pre-charging unit and the dust collecting unit. An air purifier whose body case is made of synthetic resin containing conductive resin.