JPH07289938A - Air cleaner - Google Patents

Abstract

PURPOSE:To provide an air cleaner which can collect dust entirely from large size to small size. CONSTITUTION:Dust of large particles are suction collected by means of a first filter 10 and dust of small particles are attracted electrically close to a second filter 12 and suction collected by active carbon by means of a second filter 12 by constituting a dust collecting section 9 by the first filter 1 composed of paper fiber and the second filter composed of active carbon connected with the grounding side. Also the capability of suction collecting large particles attached electrically to the second filter 12 by the first filter 10 can be improved by bringing the first filter 10 into contact with the second filter 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION This invention relates to a home air cleaner,
The present invention relates to an air cleaning device mounted on a home air conditioner and a vehicle air conditioner.

[0002]

2. Description of the Related Art A conventional air cleaning device (for example, Japanese Patent Laid-Open No. Hei 3
No. 270744) 100, as shown in FIG.
The intake air passage (air-conditioning duct or the like) 101 includes a pre-filter 102 arranged upstream, a charging unit 103, and a dust collecting unit 104 (FIG. 3).

The charging unit 103 includes a discharge electrode 105 to which a high voltage is applied and a counter electrode 10 connected to the ground side.
The discharge electrode 105 and the counter electrode 1
A corona discharge is generated between the electrodes 105, 1
The dust or the like passing through the area 06 is charged.

The dust collecting portion (collector portion) 104 is connected to a ground side and a high voltage side electrode 108 connected to a float electrode 107 in which a bias voltage is induced by the discharge electrode 105 to a predetermined high voltage. Ground electrode 109
It is constituted by and and adsorbs dust and the like charged by the charging unit 103 between these electrodes.

[0005]

However, in the above-mentioned dust collecting part, as shown in FIG.
Experiments have shown that it has a good adsorptivity for m of dust, but it is also necessary to increase the dust collection rate of particles with a large proportion of particles, such as pollen and particles that are the basis of malodor. It became clear.

[0006] Therefore, the present invention is to provide an air cleaning device capable of collecting large dusts to small dusts.

[0007]

Therefore, the present invention is
A charging unit, which is arranged on the upstream side of the air passage through which the intake air passes, is composed of a discharge electrode to which a high voltage is applied and a counter electrode connected to the ground side, and a dust collecting unit arranged on the downstream side of this charging unit. In the air purifying apparatus including the above, the dust collecting portion is configured by a first filter made of paper fiber and a second filter made of activated carbon connected to the ground side (claim 1).

It is preferable that the first filter is in contact with the second filter on the upstream side of the second filter (claim 2).

[0009]

Therefore, according to the present invention, the dust collecting portion is constituted by the first filter made of paper fiber and the second filter made of grounded activated carbon, and the charging portion arranged upstream of the air passage. Of the positively charged dust, the large particles of the dust are adsorbed and captured by the first filter, and the positively charged particles of the small particle are electrically attracted to the second filter made of grounded activated carbon. Since it is adsorbed and captured by the activated carbon, it is possible to improve the dust collecting ability of dust of large particles and small particles. In addition, since the first filter is brought into contact with the second filter on the upstream side of the second filter, large particles electrically attracted to the second filter can be reliably adsorbed and captured by the first filter. In addition, the adsorption capacity for large particles can be further improved.

[0010]

Embodiments of the present invention will be described below. As shown in FIG. 1, an air cleaner 1 according to the present invention is mounted on a home air cleaner, a home air conditioner, and a vehicle air conditioner, and is a duct through which air for purification passes. It is arranged on the air passage 3 formed by 2.

An air suction means (not shown) for sucking air into the air passage 2 is arranged upstream or downstream of the air passage 2, and the air suction means is a brushless device. It is a sirocco fan, a blade fan, or the like that is rotated by a driving unit composed of a DC motor or an AC motor such as a motor or a bear motor.

On the upstream side of the air passage 2, a pre-filter 4 formed in the shape of a wire mesh is arranged, and this pre-filter 4 removes large dust (dust, dust, etc.) from the intake air.

A charging section 5 is arranged on the downstream side of the prefilter 4. The charging unit 5 is arranged so as to sandwich the discharge electrode 7 and the discharge electrode 7 to which a high voltage of 4 to 6 KV is applied, which is connected to the high voltage power supply terminal 6 a of the high voltage power supply 6,
Counter electrode 8 connected to the ground terminal 6b of the high-voltage power supply 6
Composed of and. As a result, corona discharge occurs between the discharge electrode 7 and the counter electrode 8, and the discharge electrode 7
Dust (pollen, tobacco, microorganisms, particles contained in exhaust gas, etc.) passing between the counter electrode 8 and the counter electrode 8 is positively charged.

A dust collecting section 9 is provided downstream of the charging section 5.
Are arranged. The dust collecting section 6 is a first filter 10 made of tissue paper formed by thinly woven paper fibers.
And a second filter (activated carbon filter) 12 formed by arranging a plurality of activated carbon films 11 formed of activated carbon in parallel to the air flow path direction. still,
The activated carbon filter 12 is connected to the ground terminal 6b.

In the air cleaning apparatus 1 having the above structure, the air (contaminated air including dust) flowing into the air passage formed in the duct 2 by the air suction means (not shown) is
First, the prefilter 4 removes coarse dust. The air from which the coarse dust has been removed reaches the charging section 5, and while passing through the charging section 5, dust contained in the air becomes positive due to corona discharge generated between the discharge electrode 7 and the counter electrode 8. Be charged.

This positively charged dust, when passing through the first filter 10, has a particle size of about 1 (about 1).
(0 to 100 μm) is adsorbed and captured by the tissue paper, and the dust (small particles) that has passed through the tissue paper is attracted to the activated carbon filter 12 that becomes a negative voltage by being connected to the ground terminal 6b. Adsorbed and captured.

This allows large particles (about 5-100)
μm) is the tissue paper of the first filter 10,
Since small particles (about 0.1 to 10 μm) can be adsorbed and captured by the activated carbon filter 12, as shown in FIG.
It is capable of adsorbing and capturing particles having a width of up to 100 μm, and particularly capable of efficiently removing pollen, malodorous components, etc. as compared with conventional ones. In addition, according to the experiment, the dust collection performance (dust collection rate 90%) when the activated carbon filter 12 is grounded is improved as compared with the dust collection performance (dust collection rate 30%) when the ground is not grounded. it is obvious.

Further, when the first filter 10 is arranged at a position in contact with the activated carbon filter 12, the activated carbon filter 12 of tissue paper which is an insulating member.
The positive charge is attracted to the side surface and the negative charge is attracted to the upstream side surface of the tissue paper. As a result, the dust positively charged by the charging unit 5 is not only absorbed by the activated carbon filter 12 but also the first filter 10
The negative electric charge generated on the upstream side surface of the tissue paper attracts the tissue paper and attracts and captures the tissue paper. Therefore, the adsorption of the first filter 10 and the activated carbon filter 12 is greater than that when the first filter 10 and the activated carbon filter 12 are separated. You can improve your ability.

Further, as the intake air passes through the corona discharge generated between the discharge electrode 7 of the charging section 5 and the counter electrode 8, oxygen contained in the intake air causes a chemical reaction to generate ozone (O ₃ ) occurs. This ozone has the effect of decomposing malodorous components in the air, but if ozone is blown out as it is, it is harmful to the human body.
It is necessary to decompose this ozone. On the other hand, in the present invention, since the activated carbon filter 12 is used as the second filter, ozone can be adsorbed and decomposed in the activated carbon filter 12, so that adverse effects of ozone can be eliminated.

Although the first filter 10 made of tissue paper is arranged upstream of the activated carbon filter 12 in the above embodiment, the first filter 10 is arranged downstream of the activated carbon filter 12. Is also good. In this case, there is an effect that the dust that cannot be adsorbed by the activated carbon filter 12 can be captured by the first filter 10. However, since large particles of dust accumulate on the activated carbon filter, the dust collection rate of small particles and the deodorizing effect of the activated carbon may decrease, so the first filter 10 is arranged upstream of the activated carbon filter 12. Is desirable.

[0021]

As described above, according to the present invention, the dust collecting portion is composed of the first filter made of paper fiber and the second filter made of activated carbon, and is positively charged by the charging portion. Of the dust, large particles of dust are adsorbed and captured by the first filter, and small particles of positively charged small particles are electrically attracted to the grounded second filter and are adsorbed and captured by the activated carbon. It is possible to improve the dust collecting ability of particles and the adsorption ability of large particles. As a result, the dust collecting power of pollen is increased, and since the malodorous component can be adsorbed and captured, the deodorizing ability can be improved. Further, since the structure can be simplified, cost reduction can be achieved.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing a configuration of an air cleaning device according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a range of sizes of particles capable of collecting dust in each dust collecting portion.

FIG. 3 is a schematic configuration diagram showing a configuration of a conventional air cleaning device.

[Explanation of symbols]

 1 Air Cleaning Device 2 Duct 3 Air Passage 4 Pre-filter 5 Charging Part 6 High Voltage Power Supply 7 Discharge Electrode 8 Counter Electrode 9 Dust Collection Part 10 1st Filter 11 Activated Carbon Film 12 2nd Filter (Activated Carbon Filter)

Claims (2)

[Claims] 1. A charging part, which is arranged on the upstream side of an air passage through which intake air passes, is composed of a discharge electrode to which a high voltage is applied and a counter electrode connected to the ground side, and a charging part arranged downstream of the charging part. In the air cleaning device including the dust collecting part, the dust collecting part is constituted by a first filter made of paper fiber and a second filter made of activated carbon connected to the ground side. Air purifier to do. 2. The air cleaning apparatus according to claim 1, wherein the first filter is brought into contact with the second filter upstream of the second filter.