JP2001096189A - Air cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To control the generation of ozone and to efficiently remove not only a hydrophilic gas but also a hydrophobic gas by charged fine water particles to improve deodorization effects. SOLUTION: Fine water particles 10 are generated by a fine water particle generator 9. The particles 10, when passed through grand cylinders 11, are charged by corona discharge between discharge needles 12 and the cylinders 11 to be discharged as charged fine water particles 15 into a charged fine water particle suspending space 2. When air which entered an apparatus through a prefilter 1, is passed through the space 2, dust and a hydrophilic gas are attracted to the water particles 15. The attracted dust and hydrophilic gas components are collected on the electrode plates 7.8 of a dust collecting part 3, and hydrophobic gas component are removed by a deodorizing filter 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an air purifying apparatus having a deodorizing function.

[0002]

2. Description of the Related Art The function of an air purifier is roughly divided into dust collection and deodorization. One of the problems related to dust collection is the generation of ozone that is harmful to the human body. On the other hand, as a problem relating to deodorization, the odor gas includes a hydrophobic gas component that is hardly soluble and a hydrophilic gas component that is easily soluble in water, but the latter cannot remove the hydrophilic gas.

[0003] One of the objects removed by an air purifier is as follows.
There is cigarette smoke. Of particular concern among tobacco smoke odors are irritating odors such as ammonia. Many of these pungent odors are hydrophilic.

[0004]

However, in the conventional air purifier, a deodorizing filter such as activated carbon is used. Such a deodorizing filter is effective for a hydrophobic gas, but is not hydrophilic. The gas was not so effective and there was a complaint from users that the smell of cigarettes could not be removed.

It is very effective to use water to remove hydrophilic gases such as ammonia. However, if water is used in an air purifier, abnormal discharge may occur at the electrodes of the dust collecting section. There is.

Accordingly, a first object of the present invention is to suppress the amount of ozone generated and, with regard to the deodorizing effect, not only the hydrophobic gas but also the hydrophilic gas can be efficiently removed by the charged fine water particles. Is to do so.

A second object is to increase the charging efficiency of charged fine water particles for removing hydrophilic gas.

A third object is to facilitate maintenance of a charged fine water particle generating section for generating charged fine water particles and to reduce an installation space.

A fourth object is to further reduce the amount of ozone generated in the charged fine water particle generating section.

A fifth object is to prevent abnormal discharge at the electrode of the dust collecting section.

A sixth object is to improve the performance and extend the life of the deodorizing filter.

A seventh object is to prevent the humidity at the installation location from rising excessively.

[0013]

According to the present invention, in order to achieve the first object, after a rough dust is removed by a pre-filter, the dust is electrostatically collected by a dust collecting section to which a high voltage is applied. After that, in an air purifier that deodorizes with a deodorizing filter, fine water droplets are generated by a fine water droplet generator and charged in the ionization part, and floating between the pre-filter and the dust collection part as charged fine water droplets And a charged fine water droplet generating section is provided.

In order to achieve the second object, an ionization section for charging fine water particles is constituted by a plurality of grounded ground tubes through which fine water particles pass, and discharge needles to which a high voltage is applied. It is characterized by having done.

In order to achieve the third object, the ionization section for charging fine water particles is characterized by comprising a grounded flat plate and a discharge needle to which a high voltage is applied.

In order to achieve the fourth object, a high DC voltage is applied to the discharge needle.

In order to achieve the fifth object, the electrode plate of the dust collecting portion is covered with an insulating material.

In order to achieve the sixth object, a photocatalyst is added to the deodorizing filter.

In order to achieve the seventh object, a dehumidifying section is provided at a position downstream of the charged fine water particle generating section.

[0020]

Next, an embodiment of the present invention will be described.
This will be described in detail with reference to the drawings.

FIG. 1 shows an example of the configuration of an air purifying apparatus according to the present invention. This air purifying device includes a pre-filter 1, a charged fine water particle floating space 2, a dust collecting section 3, a deodorizing filter 4, and a blowing fan 5 from an air intake port to a blow port.
And a charged fine water droplet generating unit 6 for sending the charged fine water particles toward the charged fine water particle floating space 2 is provided.

The pre-filter 1 removes rough dust. The dust collecting section 3 has positive and negative electrode plates 7.8 alternately arranged in parallel, and the surface of each electrode plate 7.8 is covered with an insulating material. The deodorizing filter 4 is made of activated carbon or the like, to which a photocatalyst is added.

The charged fine water particle generator 6 includes a fine water particle generator 9 for generating fine water particles 10 and the fine water particles 10.
Each of the ground tubes 11 includes an ionization unit 13 that charges the fine water particles 10 by discharging from the discharge needles 12 while passing through the plurality of ground tubes 11.

The fine water droplet generator 9 is a so-called humidifier. However, when the fine water droplets are generated with the force of a commercially available humidifier, water accumulates in the device, and the air purifying device is used. Since there is a problem that the humidity in a room or the like in use increases, it is necessary to suppress the generation amount of fine water particles to a small amount. Further, the smaller the particle size of the generated fine water particles, the larger the overall surface area, which is preferable.

As shown in FIG. 2, in each ground tube 11, the discharge needle 12 protrudes into the ground tube 11, and a DC high voltage power supply 14 applies a high DC voltage. The fine water particles 10 from the fine water particle generator 9 are charged by corona discharge between the discharge needles 12 and the ground cylinders 11 when passing through the respective ground cylinders 11, and become charged fine water particles 15. The fine water particles are released into the floating space 2.

Next, the operation will be described. When the blower fan 5 rotates and blows air, dirty air passes through the pre-filter 1 and enters the inside of the apparatus. At this time, relatively large dust is removed by the pre-filter 1.

Next, the air entering the apparatus passes through the charged fine water particle floating space 2, and at this time, dust and hydrophilic gas are adsorbed to the charged fine water particles 15.

Normally, when corona discharge occurs, ozone harmful to the human body is generated, which is a problem. However, when corona discharge occurs in a fine water particle floating atmosphere, the amount of ozone generated can be suppressed. Generating fine water droplets
This is also an effective means in that ozone generation can be suppressed.

Although the DC high voltage power supply 14 is used as a power supply for the ionization unit 13, the energy efficiency and charging efficiency are lower than when a pulsed high voltage is applied, but the ozone generation amount is reduced by the pulse height. This is because it is lower than the voltage application. However, as described above, the generation of ozone can be suppressed by the fine water droplets, so that it is possible to employ a pulse high-voltage power supply having good energy efficiency and charging efficiency.

The dust and the hydrophilic gas component adsorbed on the charged fine water particles 15 as described above are supplied to the electrode plate 7 of the subsequent dust collector 3.
Collected in 8. Then, after the hydrophobic gas component is removed by the deodorizing filter 4, the air becomes clean air and is discharged out of the apparatus. Since the surfaces of the electrode plates 7 and 8 are covered with an insulating material, abnormal discharge due to a short circuit between the electrode plates 7 and 8 can be prevented.

When a plurality of ground cylinders 11 are used in the ionization section 13, the charging efficiency of the fine water particles 10 is good, but a dead space d is created between the plurality of ground cylinders 11 as shown in FIG. Also, maintenance such as cleaning is troublesome. Therefore, as shown in FIG. 4, if a grounded flat plate 16 is used instead of the ground tube 11, maintenance is easy and the installation space can be reduced.

In the above-described example, as shown in FIG. 1, the dust collecting section 3 is located downstream of the charged fine water particle generating section 6.
A dehumidifying unit 30 is provided between the filter and the deodorizing filter 4 in which an antibacterial agent having a bactericidal effect is added to a sheet containing a water absorbing agent such as a superabsorbent polymer. To prevent that.

[0033]

The advantages of the present invention are as follows for each claim. <Claim 1> Fine water droplets are generated by a fine water particle generator, charged in an ionization section, and floated as charged fine water particles between a pre-filter and a dust collecting section, thereby suppressing the amount of ozone generated. Regarding the deodorizing effect, not only the hydrophobic gas but also the hydrophilic gas can be efficiently removed by the charged fine water droplets, so that the irritating odor such as ammonia can be deodorized without increasing the ozone generation amount.

<Claim 2> Since the ionization portion for charging the fine water particles is composed of a plurality of grounded ground cylinders through which the fine water particles pass, and the discharge needle to which a high voltage is applied, the hydrophilicity is reduced. The charging efficiency of the charged fine water particles for removing gas can be increased.

<Claim 3> Since the ionization section for charging fine water particles is constituted by a grounded flat plate and a discharge needle to which a high voltage is applied, maintenance is easier than in the case of using a ground cylinder. In addition, the installation space can be reduced.

<Claim 4> Since a high DC voltage is applied to the discharge needle of the ionization section, the amount of ozone generated in the charged fine water particle generation section can be further reduced.

<Claim 5> Since the electrode plate of the dust collecting portion is covered with an insulating material, abnormal discharge at the electrode of the dust collecting portion can be prevented.

<Claim 6> Since a photocatalyst is added to the deodorizing filter, active species (radicals) generated by corona discharge
Activates the photocatalyst surface and decomposes dirt attached to the surface, so that the performance of the deodorizing filter can be improved and the service life can be extended.

<Claim 7> Since the dehumidifying section is provided at a position downstream of the charged fine water particle generating section, it is possible to prevent the humidity of the installation location from excessively increasing due to use.

[Brief description of the drawings]

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

FIG. 2 is a schematic configuration diagram of an ionization unit of a charged fine water particle generation unit.

FIG. 3 is a layout diagram of a plurality of ground cylinders of an ionization unit.

FIG. 4 is a schematic configuration diagram of another example of the ionization unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pre-filter 2 Charged fine water particle floating space 3 Dust collecting part 4 Deodorizing filter 5 Ventilation fan 6 Charged fine water particle generator 7.8 Plus / minus electrode plate 9 Fine water particle generator 10 Fine water particle 11 Ground tube 12 Discharge needle 13 Ionization part 14 DC high voltage power supply 15 Charged fine water droplet 16 Ground plate

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) B03C 3/155 B03C 3/40 A 3/16 3/41 B 3/38 C 3/40 Z 3/41 3/60 3/66 B01D 53/36 J 3/60 H 3/66 B03C 3/01 A 3/14 A F term (reference) 4D048 AA22 BA05Y CC40 CD05 EA01 EA03 4D054 AA13 BA03 BA11 BB03 BB12 BB15 BC23 EA22 EA23 EA27 EA30

Claims (7)

[Claims] 1. An air purifier that removes roughly dust with a pre-filter, electrostatically collects dust in a dust collector to which a high voltage is applied, and then deodorizes with a deodorizing filter. It is characterized in that a charged fine water particle generator is provided, which generates fine water droplets in the generator and is charged in the ionization section, and floats between the pre-filter and the dust collecting section as charged fine water particles. Air purifier. 2. An ionization section for charging fine water droplets, comprising: a plurality of grounded ground cylinders through which fine water droplets pass; and a discharge needle to which a high voltage is applied. 2. The air purifying apparatus according to 1. 3. The air purifying apparatus according to claim 1, wherein the ionizing section for charging the fine water particles is constituted by a grounded flat plate and a discharge needle to which a high voltage is applied. 4. The air cleaning device according to claim 2, wherein a high DC voltage is applied to the discharge needle. 5. The air purifying apparatus according to claim 1, wherein the electrode plate of the dust collecting section is covered with an insulating material. 6. The air purifying apparatus according to claim 1, wherein a photocatalyst is added to the deodorizing filter. 7. A dehumidifying section is provided at a position downstream of the charged fine water particle generating section.
7. The air purifying apparatus according to 4, 5, or 6.