JPH11123234A - Light deodorizing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To favorably exhibit deodorizing ability for a long period. SOLUTION: A deodorizing member 5 to carry photocatalyst to decompose odor components by irradiation of UV-ray is disposed in a vent passage B. On the windward side of the deodorizing member 5, plural lamps 3 are disposed. The lamps 3 are extended in a perpendicular direction to a vent current 2, and they are disposed to be parallel to each other. On the windward side of the respective lamps 3, a wind proofing member 24 or a reflection plate 26 is provided. By the wind proofing member 24 or the reflection plate 26, therefore, direct application of the vent current to the lamp 3 can be avoided, the lamp 3 is less likely to be contaminated, and the lamp 3 is not broken, thereby a long life of the lamp 3 can be achieved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photo-deodorizing apparatus capable of removing odors in houses and the like using a photocatalyst.

[0002]

2. Description of the Related Art Conventionally, there is an electric precipitator in which dust in a ventilation stream is charged by a charging section, and the charged dust is electrically attracted to and collected by the dust collecting section. The charging unit includes a large number of flat counter electrodes disposed in parallel with each other and ionization lines (discharge lines) disposed therebetween, and dust particles are generated by an ion shower generated by corona discharge. Is charged. On the other hand, the above-mentioned dust collecting part is composed of a large number of plate-shaped dust collecting electrode plates and an application electrode plate which are arranged in parallel to each other and form an electric field between each other. Adsorb to the plate.

[0003] In order to make the above-mentioned electric precipitator have a function of removing harmful gas components, a photocatalyst capable of decomposing odor components by irradiation of ultraviolet rays is attached to the charging portion or the electrode plate of the precipitating portion. An apparatus provided with a light source for irradiating the photocatalyst with light including ultraviolet rays has been provided (JP-A-5-2373).
No. 81).

[0004]

In this publication,
In order to remove the dust particles attached to the collecting electrode plate, the dust collecting electrode plate must be periodically cleaned by rubbing with a brush using cleaning water. There is a risk that the photocatalyst may fall off, and if it falls off, the function of removing gas components cannot be fulfilled thereafter.

Further, since the electrode plates of the charging unit and the dust collecting unit are made of a metal plate or a resin plate and cannot transmit a ventilation flow, the overall ventilation resistance is reduced. In addition, it is necessary to arrange the electrode plates so as to be parallel to the direction of the air flow, and the interval between the electrode plates must be widened. For this reason, there is a problem that a large part of the ventilation flow passing between the electrode plates passes without contacting the electrode plates, resulting in a low gas removal capability.

In the above publication, the light source is disposed close to the longitudinal end of the electrode plate to which the photocatalyst is attached, so that light from the light source is substantially parallel to the electrode plate. As a result of irradiation from a near direction, the light illuminance on the photocatalyst attached to the electrode plate is weakened, and the deodorizing ability is very low. In addition, there is a problem that light cannot be uniformly irradiated on the electrode plate to which the photocatalyst is attached.

Accordingly, an object of the present invention has been made in view of the above problems, and an object of the present invention is to provide a light deodorizing apparatus capable of exhibiting a high deodorizing ability for a long period of time.

[0008]

According to the first aspect of the present invention, there is provided a deodorizing member which is disposed in a ventilation path and permits permeation and circulation of a ventilation flow, and is disposed adjacent to the deodorizing member in the ventilation path. A column-shaped lamp, and the deodorizing member carries a photocatalyst that decomposes odor components by being irradiated with light, and the lamp is arranged on the windward side of the deodorizing member, and is orthogonal to the direction of the ventilation flow. A light deodorizing device, wherein a windproof member is provided on the windward side of the lamp.

According to the first aspect of the present invention, the airflow is prevented from directly hitting the lamp by the windproof member. Thus, the lamp is not always exposed to the wind, and the lamp is less likely to be soiled and damaged. According to a second aspect of the present invention, the deodorizing member includes a deodorizing member that is disposed in the ventilation path and allows permeation of the ventilation flow, and a cylindrical lamp that is disposed in the ventilation path and close to the deodorizing member. Is
The lamp carries a photocatalyst that decomposes odor components upon irradiation with light, and the lamp is disposed on the windward side of the deodorizing member, extends in a direction perpendicular to the direction of the air flow, and has a reflector on the windward side of the lamp. Is provided.

According to the second aspect of the invention, the light of the lamp is favorably reflected to the deodorizing member by the reflector. Further, since the reflector is arranged on the windward side of the lamp, the reflector also prevents direct flow of the airflow onto the lamp, thereby preventing the lamp from being stained and extending the life of the lamp.

[0011]

Embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a side view schematically showing a light deodorizing device according to one embodiment of the present invention. Referring to FIG. 1, in this light deodorizing device, a filter is provided in an air passage B partitioned by a casing 10. A is placed, and
A fan 1, for example a sirocco fan, for generating a ventilation stream 2 passing through the filter A is arranged downstream (with respect to the direction of the ventilation stream 2) of the filter A and also emits at least two lights containing ultraviolet light. Three cylindrical lamps 3
Is arranged on the upstream side of the filter A.

The above-mentioned filter A is a multifunctional laminated filter in which an electrostatic filter 4 and a deodorizing filter 5 are laminated. An ionization unit 20 for ionizing dust particles in the ventilation flow 2 is disposed on the upstream side of the filter A. The dust particles charged by the ionization unit 20 are:
The electrostatic filter 4 on the downstream side electrically attracts and removes dust. That is, the light deodorizing device also has a function as an air purifier.

The above-mentioned ionization section 20 includes a large number of plate-like opposed pole plates 21 arranged in parallel with each other and ionization lines 22 as discharge lines arranged between them, and is formed by corona discharge. The dust particles are charged by the ion shower. Each of the above cylindrical lamps 3
It extends in a direction perpendicular to the direction of the ventilation flow 2 and is arranged in parallel between adjacent pairs of opposing electrode plates 21. Specifically, the ionized portion is formed in a panel shape by the resin frame 23. The resin frame 23 has a cross-section U-shaped cross section 24 that opens toward the leeward side, and the opposing electrode plates 21 formed in pairs are arranged along opposing wall surfaces of the adjacent cross sections 24. I have.

The lamps 3 are arranged between adjacent pairs of opposed electrode plates 21 between adjacent sets in a state of being surrounded on three sides by a crosspiece 24 having a U-shaped cross section. That is, the crosspiece 24 surrounding the lamp 3 constitutes a windshield member for preventing the ventilation flow 2 from directly hitting the lamp 3. In addition, a reflector having a V-shaped cross section for reflecting the light of the lamp 3 toward the filter A is disposed in the crosspiece 24 in which the lamp 3 is housed. The reflection plate 26 may be formed of a glossy metal plate, or may be formed by depositing aluminum on a resin sheet.
Further, the cross section of the reflection plate 26 is not limited to the V-shape, but may be a U-shape or other curved shape.

Further, the larger the number of the lamps 3 is,
Although the light can be applied to the filter A more uniformly,
If there are at least two light sources, the light can be irradiated much more uniformly than when only one light source is used. Lamp 3
It is preferable that the interval between them is appropriately set so that the filter A is irradiated with light as uniformly as possible. Further, the diameter of the lamp 3 may be any as long as it can be accommodated in the above-mentioned bar 24. For example, the diameter is 4 mm, 2 mm, 1 mm
A small-diameter material such as described above can be used.

Referring to FIG. 2, the above-mentioned filter A is unwound from a roll body A1 on which it is wound up to a ventilation path B, which is a use area, and is formed into a planar shape orthogonal to the direction of ventilation flow 2. It is a so-called roll filter of the type to be arranged. This filter A is composed of the electrostatic filter 4 as described above.
And a deodorizing filter 5 as a deodorizing member laminated on the downstream side of the electrostatic filter 4 in the direction of the air flow 2. The filters 4 and 5 are joined to each other by a needle punch.
Reference numeral 6 denotes a needle punch processing section formed by entanglement of the fibers of the filters 4 and 5 by needle punch, and a large number of the processing sections are scattered. At least one surface of the deodorizing filter 5 (the surface opposite to the electrostatic filter 4 in the figure) is provided with a photocatalyst carrier 7 formed by applying a kneaded material of a photocatalyst and an adsorbent. The filter A is capable of transmitting light including ultraviolet rays, and is also configured to irradiate light to the photocatalyst of the photocatalyst holding unit 7 arranged on the side opposite to the lamp 3.

As the above-mentioned electrostatic filter 4, for example,
A polyolefin-based chargeable nonwoven fabric having a basis weight of 50 g / m ² can be used. On the other hand, as a material of the deodorizing filter 5 on which the photocatalyst supporting portion 7 is formed, for example,
g / m ² polyester-based nonwoven fabric can be used. The photocatalyst means a substance that absorbs light and gives the energy to a reactant to cause a chemical reaction. Specifically, holes generated on the surface of the photocatalyst by being irradiated with light including ultraviolet rays react with adsorbed water on the photocatalyst surface to generate radical OH (hydroxyl radical),
The radical OH breaks the molecular bond of the organic substance, thereby eliminating odor components such as ammonia. Since the photocatalyst can be regenerated by decomposing the adsorbed odor component by light irradiation, the deodorizing ability can be maintained for a long time.

As the above-mentioned photocatalyst, titanium dioxide, zinc oxide and tungsten trioxide can be used, but from the following points, it is preferable to use titanium dioxide. That is, titanium dioxide can exert a sufficient deodorizing function even with weak ultraviolet light, and can emit a wide range of odorous substances, for example, ammonia, acetaldehyde,
This is because it can remove the bad smell of acetic acid, trimethylamine, methyl mercaptan, hydrogen sulfide, styrene, methyl sulfide, dimethyl disulfide and isovaleric acid. This is because it is stable and highly secure.

Here, the term "joining with a needle punch" means that the fibers of both filters are entangled and joined by inserting and passing through both filters with a sharp hooking needle. As the arrangement density of the needle punch processing units 6, for example, 8200 to 8300 pieces are scattered in an area of 12750 cm ² .

The operation of applying the kneaded material containing the photocatalyst is as follows.
It may be performed before joining work by needle punch,
It may be performed after the joining operation, and in any case, the kneaded material may be applied to at least one surface of the deodorizing filter 5. In the above embodiment, the ventilation flow 2 is circulated to the filter A side through the space between the pair of opposing electrode plates 21 and permeates and circulates through the filter A. At this time, the odor component is adsorbed by the adsorbent, Decomposed by the photocatalyst and processed.

Since the lamp 3 is parallel to the surface of the filter A and has a plurality of lamps, the photocatalyst carried on the deodorizing filter 5 can be uniformly irradiated with strong light regardless of the location. As a result, the activation of the photocatalyst can be promoted, so that a high deodorizing ability can be maintained for a long period of time, and the life of the deodorizing filter can be prolonged. In addition, since the filter A that can transmit the ventilation flow 2 is disposed so as to extend over substantially the entire area of the cross section of the ventilation path B, almost all of the ventilation flow 2 can be brought into contact with the deodorizing filter 5, and as a result, deodorization can be achieved. The amount of air contact with the filter 5 can be increased. As described above, a large amount of air contact can be ensured with respect to the deodorizing filter 5 capable of exhibiting a high deodorizing ability as described above. By the promotion, the life of the deodorizing filter 5 can be extended.

Further, since a windshield member such as a bar 24 is provided on the windward side of the lamp 3 disposed on the windward side of the filter A, it is possible to prevent the ventilation flow 2 from directly hitting the lamp 3. The stain on the lamp 3 can be prevented. From this point, the lamp life can be prolonged, and the high deodorizing ability can be maintained for a long time. Filter A
Is used as a roll filter, maintenance for updating the filter A in the use area can be performed very easily.

In particular, in the present embodiment, the lamp 3 is arranged in an empty space originally provided in the ionization section 20 of the air purifier, so that the structure can be downsized and the air purifier can be deodorized. Features can be incorporated. In the present embodiment, the electrostatic filter and the deodorizing filter are laminated to form an integrated filter, but these may be formed separately.

In the present embodiment, the ionizing section and the electrostatic filter as the dust collecting section are provided to have the air cleaning function. However, when these are configured as a single light deodorizing device, they must be eliminated. Can be. In the above embodiment, the filter A is arranged as a roll filter so as to be orthogonal to the ventilation flow 2, but is not limited to this, and as shown in FIG. The plate-like filters 31 may be arranged in parallel at predetermined intervals, and these filters 31 may be inclined so as to intersect the direction of the ventilation flow 2 at a predetermined intersection angle. In this case, when the filter frame 2 is viewed from the front, it is preferable that no gap is formed between the filters 31, but some gap may be provided. The filter 31 is made of the same material as the filter A of the above embodiment.

As the deodorizing filter, in addition to the above-described material sheet having a surface coated with a kneaded material of a photocatalyst and an adsorbent, a filter in which activated carbon fiber yarn and photocatalyst yarn are woven into a single sheet, A sheet obtained by laminating a sheet containing activated carbon fibers and a sheet containing photocatalytic yarn can be exemplified. The above-mentioned photocatalyst yarn is a yarn carrying a photocatalyst or, if possible, a yarn consisting of the catalyst itself.

Further, as the deodorizing filter, a secondary processed product in which a photocatalyst is supported on a base material mainly composed of an inorganic material can be used. In this case, the secondary processed product may be, for example, a ceramic ball carrier, a granular material, or the like. , A honeycomb body, a granulated body, and a paint body. The direction of light irradiation on the deodorizing filter 5 is preferably the normal direction of the surface, but is not limited thereto, and the light may be irradiated obliquely.

In addition, various changes can be made within the scope of the present invention.

[Brief description of the drawings]

FIG. 1 is a side view schematically showing a light deodorizing device as one embodiment of the present invention.

FIG. 2 is a schematic perspective view of a main part of the filter.

FIG. 3 is a partially cutaway perspective view of a filter of a light deodorizing device as another embodiment of the present invention.

[Explanation of symbols]

 2 Ventilation flow 3 Lamp 5 Deodorizing filter (Deodorizing member) 24 Crosspiece (Windshield member) 26 Reflector

Continued on the front page (72) Inventor Hachiro Kurokawa 1304 Kanaokacho, Sakai-shi, Osaka Daikin Industries, Ltd.Sakai Works Co., Ltd. (72) Inventor Yasuo Sato 1304 Kanaokacho, Sakai-shi, Osaka Daikin Industries, Sakai Works

Claims (2)

[Claims] 1. A deodorizing member (5) which is arranged in a ventilation path (B) and permits permeation and circulation of a ventilation flow (2), and is disposed in the ventilation path (B) in proximity to said deodorizing member (5). A column-shaped lamp (3), wherein the deodorizing member (5) carries a photocatalyst that decomposes odor components upon irradiation with light, and the lamp (3) includes the deodorizing member (5). ), Which is disposed on the windward side of the lamp, extends in a direction perpendicular to the direction of the ventilation flow (2), and a windproof member (2) is provided on the windward side of the lamp (3). 2. A deodorizing member (5) which is disposed in the ventilation path (B) and permits permeation and circulation of the ventilation flow (2), and is disposed in the ventilation path (B) in proximity to the deodorizing member (5). A column-shaped lamp (3), wherein the deodorizing member (5) carries a photocatalyst that decomposes odor components upon irradiation with light, and the lamp (3) includes the deodorizing member (5). ), Which is arranged on the windward side of (1), extends in a direction perpendicular to the direction of the ventilation flow (2), and a reflector (26) is provided on the windward side of the lamp (3).