JP2000051342A - Deodorizing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a deodorizing device which secures an absolute amount of an adsorbent to exhibit good deodorizing performance, can regenerate the adsorbing performance of the adsorbent by radiating light of a specified wavelength, causes no breakage of a light source and no trouble due to the breakage so as to be excellent in durability, and can hold the adsorbing and deodoring performance over a long period of time. SOLUTION: A filter 10 containing an adsorbent and a photocatalyst is disposed in a ventilating hole 40 of an air conditioner, a part 10a of the filter is exposed to the outside of the device, light of a specified wavelength is applied from a light source 30 to the exposed part 10a of the filter 10 to activate the photocatalyst, thereby decomposing and removing the odor component adsorbed to the adsorbent to regenerate the adsorbing and deodorizing performance of the adsorbent.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deodorizing device used for various air conditioners such as a cooling / heating device, a ventilating device, an air purifying device, and more particularly to an adsorbent such as activated carbon contained in a deodorizing layer of a filter. By decomposing the odorous component with a photocatalyst such as titanium oxide,
The present invention relates to a deodorizing device capable of regenerating the deodorizing / adsorbing performance of an adsorbent and maintaining the life of a filter for a long time.

[0002]

A deodorizer utilizing the redox power of a photocatalyst activated by irradiating a filter containing a photocatalyst such as titanium oxide with ultraviolet light is disclosed in, for example, JP-A-63-080833. It is known from US Pat.

[0003] In this case, the photocatalyst can be used in combination with an adsorbent such as activated carbon, and by using a binder to fix and carry a photocatalyst such as titanium oxide on the adsorbent to exhibit deodorizing performance. Such powders have been granulated or granulated and used as adsorbents.

As a light source for irradiating the photocatalyst with ultraviolet rays, it is desirable to dispose it at a position near the photocatalyst from the viewpoint of the intensity of ultraviolet rays. 09-0
No. 66282) and the use of a light emitting diode instead of an ultraviolet lamp (Japanese Patent Application Laid-Open Nos. 09-038487 and 09-038503) are known.

[0005] However, the photocatalytic gas decomposition ability (or redox power) is quite high, but the reaction rate is low,
In a situation where air passes at a high speed as in an air conditioner, a photocatalyst alone cannot provide sufficient deodorizing performance. On the other hand, in the case where the photocatalyst is fixed and supported on an adsorbent such as activated carbon using a binder or the like, the binder used for fixing and supporting the photocatalyst enters the adsorption site of the adsorbent, so that the base adsorbent is used. As a result, the initial performance of the adsorbent may be reduced, or the photocatalyst may block the surface of the adsorbent such as activated carbon, so that the original adsorbent's original adsorbing performance may not be sufficiently exhibited. As a result, a desired deodorizing ability may not be obtained. There was a problem that there was.

In addition, the space available for deodorization is often limited, and adding a photocatalyst to the adsorbent may cause a decrease in the absolute amount of the adsorbent, which may cause a decrease in initial performance.

Further, when a light source such as an ultraviolet lamp or a light emitting diode or an optical fiber extended from such a light source is provided inside the air conditioner, the durability is deteriorated because vibrations due to air flow are constantly applied. However, it is not possible to say that there is no possibility that secondary damage will occur due to these damages, especially in the case of air conditioning equipment for vehicles, vibration of the adjacent engine and vibration of the body itself will be added However, there is a problem that the tendency of occurrence of such a problem becomes more remarkable, and solving these problems has been a problem in the conventional deodorizing apparatus.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems in a conventional deodorizing apparatus utilizing the oxidation-reduction power of a photocatalyst. It is an object of the present invention to provide a deodorizing apparatus which exhibits excellent deodorizing performance by securing an amount thereof and has a function of regenerating an adsorbent using a photocatalyst.

[0009]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies to solve the above problems, and as a result, a photocatalyst has been conventionally fixed to an adsorbent using a binder to obtain its oxidation catalytic action.・ It was made to be supported, but it was not always necessary to integrate it with the adsorbent by the binder,
It has been found that a sufficient oxidation catalytic action as a photocatalyst can be exerted even by bringing the adsorbent close to or in contact with the adsorbent.

Furthermore, molecules such as malodorous components adsorbed by an adsorbent such as activated carbon are not fixed and fixed on the adsorbent particles. To the side of the adsorbent particles.

The deodorizing device according to the present invention is based on such knowledge. The deodorizing device according to the first aspect of the present invention includes a filter containing an adsorbent, and is provided in a ventilation hole of various air conditioning devices. In a deodorizing device that is attached and deodorizes by adsorbing odor components contained in the air passing through the ventilation holes, the filter includes a photocatalyst together with an adsorbent,
A configuration in which a light source that irradiates light including a wavelength for activating a photocatalyst to an exposed portion of the filter is provided on the exposed portion of the filter while a part is disposed inside the vent hole in a state exposed to the outside of the device. Such a configuration of the deodorizing device is a means for solving the above-mentioned conventional problems.

The deodorizing device according to the second aspect of the present invention is configured such that the adsorbent contains activated carbon. Similarly, in the deodorizing device according to the third aspect, the photocatalyst includes an activated carbon. It is characterized by including titanium oxide. Further, as an embodiment, in the deodorizing device according to claim 4, the basis weight of the photocatalyst in the exposed portion of the filter is larger than that in the device. In the deodorizing device according to claim 5, the photocatalyst is 7. The filter according to claim 6, wherein the filter is included only in an exposed portion of the filter.
In the deodorizing apparatus according to the above, the weight of the photocatalyst in the exposed portion of the filter is 3 to 70% by weight of the weight of the adsorbent.

[0013] In the deodorizing device according to the present invention, the filter may include a nonwoven fabric serving as a deodorizing layer for holding adsorbent particles, and a dust removing layer provided on both sides of the nonwoven fabric. In the deodorizing apparatus according to claim 8, the photocatalyst is a granule or a granulation. The deodorizing apparatus according to claim 9, wherein at least one of the nonwoven fabric forming the deodorizing layer and the dust removing layer includes a photocatalyst or a photocatalyst. It is characterized in that a coating agent containing the precursor is applied or impregnated.

Further, in the deodorizing apparatus according to claim 10 as an embodiment of the deodorizing apparatus according to the present invention,
At least a portion of the filter located inside the apparatus is attached to a vent while being housed in a cartridge case, and in the deodorizing apparatus according to claim 11 as an embodiment, the filter is moved from inside the apparatus to outside. The structure is such that a seal is applied to the protruding portion, and such a structure in the deodorizing device is characterized as a means for solving the above-mentioned conventional problem.

[0015]

The deodorizing apparatus according to the present invention comprises a filter containing a photocatalyst together with an adsorbent and a light source for emitting light having a specific wavelength. The filter is disposed in a ventilation hole of an air conditioner, and the filter is provided. A part of the filter is exposed to the outside, and the exposed portion of the filter is irradiated with light from the light source to activate the photocatalyst.
It is designed to reproduce the deodorizing performance.

That is, in the deodorizing device according to the present invention, when air flowing through the air holes of the air conditioner passes through the filter, odor components in the air are adsorbed by the adsorbent in the filter and removed. The adsorption capacity of the adsorbent is limited depending on the number of adsorption sites, component concentration, flow rate, etc. of the adsorbent, but the adsorbed odor component passes between the adsorbents in the filter on the low adsorbent concentration side. To the adsorbent in the exposed portion of the filter, which is finally located outside the air conditioner and has the lowest odor component concentration, and reaches the photocatalyst mixed with the adsorbent in this exposed portion . Since the photocatalyst is irradiated with light of a specific wavelength, the photocatalyst is activated and the odor component is decomposed, so that the odor component adsorbed by the adsorbent in the filter is exposed to the light. It moves to the partial side one after another, so that the adsorption site of the adsorbent located in the vent hole becomes empty, and the odor component in the air passing through the filter is continuously adsorbed and removed.

Although the details of this mechanism are not always clear, the odor component adsorbed on the adsorbent is not fixed to the adsorption site of the adsorbent, and can be desorbed and re-adsorbed. It is believed that the driving force for the adsorbed odor component to move is due to the difference in the concentration of the adsorbed component between the adsorbents as described above. Since there is no adsorption of odor components in the part of the adsorbent exposed outside the filter device,
The concentration difference between the adsorbent and the adsorbent located inside the device becomes large, and the odor component moves from the inside of the air conditioner to the outside. In a portion of the filter exposed to the outside of the device, the photocatalyst is located near the adsorbent, and the odor component adsorbed by the adsorbent can move to the photocatalyst. When the photocatalyst is activated by irradiating light of a specific wavelength and the odor component transferred to the photocatalyst is decomposed, a concentration difference between the adsorbent and the photocatalyst occurs, and the odor component further moves. By such a continuous process, the adsorption / deodorization performance of the adsorbent is regenerated.

In the present invention, the air conditioner is
It does not perform temperature control such as a ventilation device or an air purifier, and also means only heating, cooling, or humidifying, and is a general term for devices that adjust the atmosphere of living spaces such as buildings, vehicles, and ships. It does not mean only a cooling and heating device.

[0019] In the deodorizing apparatus according to the present invention, the adsorbent and the photocatalyst constituting the filter are defined in claim 2.
For example, activated carbon and titanium oxide can be used. In addition, zeolite as an adsorbent and zinc oxide (Zn) as a photocatalyst
O) and zirconium oxide (ZrO ₂ ) can be used, but the above-mentioned activated carbon and titanium oxide are preferable in consideration of performance, stability in terms of material supply, price, and the like.

In this case, the photocatalyst needs to be present in the exposed portion of the filter to be irradiated with light in a state of being in contact with or in proximity to an adsorbent such as activated carbon. As described above, it is desirable that the amount of the photocatalyst in the exposed portion from the air conditioner, that is, in the irradiated portion of the light be larger than that in the portion of the device where the irradiation is not performed, and further, as described in claim 5, It is desirable to include the photocatalyst only in the exposed portion. This is because the photocatalyst does not function as a photocatalyst in the part where light irradiation is not performed, but also functions as an adsorbent,
In general, the adsorption performance is inferior to that of an adsorbent such as activated carbon. Therefore, when the amount of the photocatalyst in the portion inside the apparatus, that is, the portion where the odor component is adsorbed, is large, it may cause a decrease in the initial adsorption performance.

Also, an exposed portion of the filter from the device,
That is, regarding the amount of the photocatalyst in the light irradiation part,
As described in claim 6, it is desirable that the content is 3 to 70% by weight of the adsorbent in the portion. That is,
When the amount of the photocatalyst is less than 3% by weight of the adsorbent, the amount of the photocatalyst is too small to fully exert its function, and the regeneration of the adsorption performance is not performed promptly. If the amount exceeds 50% by weight, the amount of the adsorbent is too small, so that the adsorbed odor component cannot be promptly moved to the photocatalyst side to be decomposed, and similarly, the regeneration of the adsorption performance is hindered. .

Further, the filter structure comprises a nonwoven fabric as a deodorizing layer holding adsorbent particles and a nonwoven fabric provided as a dust removing layer on both sides of the deodorizing layer nonwoven fabric. Can have a layered structure,
In addition, the filter may be folded in a bellows or honeycomb structure to increase the amount of adsorbent located in the air conditioner, increase the frequency of contact with the passing air, and reduce the ventilation resistance. Desirable.

As the three-layer structure, as described in claim 8, the photocatalyst is formed into granules or granules, and for example, by blending the photocatalyst with the adsorbent, the non-woven fabric as the deodorizing layer contains the adsorbent particles. They can be mixed in a state of contact or close proximity, and this embodiment is shown in FIG.

That is, the filter 1 shown in FIG.
In FIG. 0, a deodorizing layer 11 located at the center is made of a nonwoven fabric 13 holding adsorbent particles 12 made of activated carbon or the like, and a right-hand portion 10a of the deodorizing layer 11 in the drawing has granules or granulated titanium oxide or the like. The photocatalyst particles 14 are mixed in a contact or close state, and a nonwoven fabric 16 as a dust removal layer 15 is provided on both front and back sides of the deodorizing layer 11.
And 17 are provided. And this filter 10
In the figure, the right portion 10a in the figure, that is, the mixed portion of the photocatalyst particles 14 is a portion to irradiate light,
This portion 10a is exposed from the air conditioner.

In this case, the photocatalyst has a particle diameter of 0.1 mm.
As described above, it is desirable to perform granulation or granulation treatment to 3 mm or less. That is, when the particle size is less than 0.1 mm, the photocatalyst particles 14 are too small, and it is difficult to hold the photocatalyst particles on the nonwoven fabric 13 forming the deodorizing layer 11.
If the value exceeds m, the specific surface area of the photocatalyst particles 14 becomes small and the desired photocatalytic function cannot be obtained, and it becomes difficult to fold the filter 10.

In order to hold the adsorbent particles 12 on the nonwoven fabric 13, a hot melt nonwoven fabric or a hot melt powder can be used. It is necessary to select these amounts or types so as not to cause significant clogging of the bonding surface.

Further, as the three-layer structure filter, at least one of the nonwoven fabric forming the deodorizing layer by holding the adsorbent and the nonwoven fabric serving as the dust removing layer positioned on both sides thereof as described in claim 9, By applying or impregnating a coating agent containing a photocatalyst such as titanium oxide, the photocatalyst can be brought into contact with or close to the adsorbent. This embodiment is shown in FIGS. 2B and 2C.

That is, the filter 1 shown in FIG.
0, the dust removal layers 15 located on both sides of the deodorization layer 11
After coating or impregnating a coating agent containing a photocatalyst on the right side portions 10a of the nonwoven fabrics 16 and 17 in the drawing, only the adsorbent particles 12 are retained on the nonwoven fabric 13 forming the deodorizing layer 11. Further, in the filter 10 shown in FIG. 2C, the nonwoven fabric 13 forming the deodorizing layer 11 is coated or impregnated with a coating agent containing a photocatalyst on the right side 10a in the figure, and then the adsorbent particles 12 are retained. Let me do it. In these filters 10, the right portion 10a in the drawing, that is, the portion coated or impregnated with a coating agent containing a photocatalyst is a portion exposed from the air conditioner and irradiated with light.

The method of applying the coating agent in this case is not particularly limited, such as application by spraying or impregnation by dipping. In order to efficiently promote the decomposition reaction of the adsorbed component by the oxidation-reduction power of the photocatalyst, the photocatalyst is used. It is necessary that the adsorbent is in contact with or close to the adsorbent, and the coating agent is desirably applied to the surface of the nonwoven fabric that contacts the adsorbent. Therefore, FIG.
As shown in (c), the nonwoven fabric 1 forming the deodorizing layer 11
3 is impregnated with a coating agent, and then adsorbent particles 12
It is more preferable that the coating agent is applied to the inner surfaces of the nonwoven fabrics 16 and 17, which are located outside the filter 10 and constitute the dust removal layer 15, facing the deodorizing layer 11.

As the coating agent to be applied or impregnated on the nonwoven fabric, for example, titanium oxide and an inorganic binder,
It preferably contains a silicate-based binder, and has a solid content of 3 to 40% by weight, and a titanium oxide ratio in the solid content of 10 to 90% by weight. This is because when the solid content is less than 3% by weight, the coating agent is not evenly applied or impregnated on the non-woven fabric, so that it is difficult to obtain the desired effect. This increases the viscosity of the nonwoven fabric, which impairs the uniformity of application or impregnation, and also causes the solid content to block pores on the surface of the nonwoven fabric, thereby increasing the pressure loss of the filter. When the proportion of titanium oxide in the solid content is less than 10% by weight, the effect as a photocatalyst is small, and when it exceeds 90% by weight,
This is because holding the titanium oxide on the nonwoven fabric becomes difficult because the amount of the binder is small.

The filter having such a structure is folded, for example, and housed in a cartridge case as described in claim 10, and attached to a vent of an air conditioner.
It is desirable to have a structure that can be taken out in the form of a cassette so that the filter can be easily cleaned or replaced. By forming the filter in a folded structure, the surface area per unit volume of the filter is increased, and the efficiency of collecting odor and dust can be improved.

FIG. 3 shows an embodiment of such a filter cartridge. In the filter cartridge 20 shown in FIG. 3, the deodorizing layer 11 is provided as shown in FIGS. 2 (a) to 2 (c). Nonwoven fabric 13 to be formed
And nonwoven fabrics 16 and 17 forming a dust removal layer 15
The filter 10 having a layered structure is housed in the cartridge case 21 in a state of being folded in a bellows shape,
A portion 10a on one end side of the filter 10 where the photocatalyst particles 14 are mixed or a portion 10a coated or impregnated with a coating agent containing a photocatalyst is pulled out from an end of the cartridge case 21, and the filter cartridge 20 is removed from the air by the air. When attached to the ventilation hole of the adjusting device, the one end portion 10a is exposed to the outside of the air adjusting device, and the portion is irradiated with light.

At this time, the entire filter 10 is housed in the cartridge case 21 and the filter cartridge 2
It is also possible that only the portion 10a on one end side of the filter 10 in the case 21 is exposed to the outside of the apparatus and light is emitted when the filter 0 is attached to the ventilation hole.

In any case, the space between the air conditioner and the filter cartridge 20 and the portion where the filter 10 comes out of the cartridge case 21 or the inside of the apparatus body are sufficiently reduced so that the efficiency of the air conditioner is not reduced. It is desirable to seal.

The wavelength of light for irradiating the exposed portion of the filter from the air conditioner to activate the photocatalyst is 200 to 500 nm, more preferably 200 to 400 nm.
It is desirable that That is, in the case of light having a wavelength of less than 200 nm, since the light has a large energy, light deterioration of the non-woven fabric and the resin-made peripheral parts constituting the filter may be accelerated. In the case of, sufficient energy cannot be supplied to the excitation energy of the photocatalyst, and the desired catalytic reaction tends to be not obtained.

[0036]

The deodorizing device according to claim 1 of the present invention is
The above configuration, i.e., a filter including an adsorbent and a photocatalyst, and a light source that generates light including a wavelength that activates the photocatalyst, wherein the filter is disposed in the vent hole with a part thereof being exposed to the outside of the device In addition, since the light from the light source is applied to the exposed portion of the filter from the device, the odor component contained in the air passing through the filter is adsorbed by the adsorbent located in the ventilation hole.・ Along with being removed, the adsorbed odor component moves between the adsorbent in the filter from the inside of the air conditioner to the exposed portion outside and is decomposed by the photocatalyst activated by light irradiation in the exposed portion. Therefore, it is regenerated before the adsorption / deodorization performance of the adsorbent deteriorates, and it can always exhibit excellent deodorization ability, and a part of the filter can be removed from the outside of the device. By exposing the photocatalyst inside the filter to light outside the device, the light source is not affected by the air flow, so damage and troubles due to damage can be avoided, and durability is improved. Can be improved.

As an embodiment of the deodorizing device according to the present invention, in the deodorizing device according to the second aspect, activated carbon is used as an adsorbent, so that a filter excellent in adsorption performance and light weight can be obtained at low cost. Also, similarly, in the deodorizing apparatus according to claim 3 as an embodiment, since titanium oxide is used as a photocatalyst, a filter having excellent performance and stability can be obtained at low cost, and deodorizing performance and regeneration performance can be obtained. A deodorizing device having excellent cost performance can be provided.

In a deodorizing apparatus according to a fourth aspect of the present invention, the weight of the photocatalyst in an exposed portion of the filter, that is, a portion exposed to the outside of the device and receiving light of a specific wavelength is located in the device. Since the amount of photocatalyst in the device inside the filter is reduced and the amount of adsorbent can be increased according to the reduced amount of photocatalyst, the adsorption performance of the filter is improved and the deodorization performance is improved. It can be an excellent deodorizing device, and in the deodorizing device according to claim 5, since the photocatalyst is contained only in the exposed portion of the filter, the amount of the adsorbent in the internal portion of the filter can be further increased, The adsorbing performance of the filter is improved, so that a deodorizing device having more excellent deodorizing performance can be obtained. Because basis weight of the photocatalyst in the exposed portion of the terpolymer is are a 3 to 70 wt% of the adsorbent mass per unit area,
The balance between the adsorption performance of the odor component in the portion and the decomposition performance of the odor component by the photocatalyst activated by light irradiation is excellent, and an excellent deodorizing device having excellent regeneration performance can be obtained. The effect is brought.

In an embodiment of the deodorizing device according to the present invention, in the deodorizing device according to claim 7, the filter is provided with a nonwoven fabric as a deodorizing layer holding adsorbent particles and a nonwoven fabric as a dust removing layer on both sides thereof. Since it has a three-layer structure, it is possible to provide a deodorizing device which is excellent not only in adsorption and deodorizing performance but also in dust removal. In the deodorizing device according to claim 8 as an embodiment of the deodorizing device, the deodorizing layer of the filter is used. Since the photocatalyst, which has been granulated or granulated, is mixed with the adsorbent particles in the inside, the photocatalyst and the adsorbent come close to or come into contact with each other, and the odor component adsorbed by the adsorbent moves to the photocatalyst and moves. The decomposition of the odorous component proceeds smoothly, and a good deodorizing performance and a regenerating function can be obtained. At least one of the three-layered nonwoven fabric forming the deodorizing layer and the dust removing layer is coated with or impregnated with a photocatalyst or a photocatalyst precursor, so that the photocatalyst is close to the adsorbent in the deodorizing layer. Or, the odor components adsorbed on the adsorbent are smoothly moved and decomposed, and similarly, an effect of obtaining a good deodorizing performance and a regenerating function can be obtained.

Further, in the deodorizing device according to the tenth aspect of the present invention, since the filter is housed in the cartridge case, the filter can be easily attached to and detached from the device. The replacement can be easily performed.
In the deodorizing device described in 1, the portion where the filter goes out from the inside of the device to the outside is sealed, so that the air flowing through the vent hole hardly leaks to the outside, and the temperature of the air adjusting device can be controlled.
The effect of being able to prevent a decrease in humidity control, dust removal, ventilation performance, and the like can be obtained.

[0041]

EXAMPLES The present invention will be described below more specifically based on examples. It goes without saying that the present invention is not limited to only such an embodiment.

Example 1 First, in preparing a filter 10 having a three-layer structure as shown in FIG.
7 as 3 to 15 denier PP (polypropylene)
Nonwoven fabric having a basis weight of 30 to 100 g / m ^{2 made} of fiber or PET (polyethylene terephthalate) fiber and nonwoven fabric 13 forming deodorizing layer 11 are 4 to 15
30 ~ consisting of denier PP fiber or PET fiber
A nonwoven fabric having a basis weight of 80 g / m ² was prepared.

Next, with respect to the nonwoven fabric 13 forming the deodorizing layer 11 of the filter 10, a portion (width 200 × length) that fits in the cartridge case 21 (inner width 200 × depth 200 × height 30mm) shown in FIG. About 500 mm × thickness 3 mm), the adsorbent 12 containing activated carbon particles having a particle diameter of 100 μm or more as a main component is filled with 20 g / m ² and the portion 10 a (width 200 mm) exposed from the cartridge case 21.
× depth 130 mm) as a photocatalyst 14, a granulated body of titanium oxide powder (ST-A31, manufactured by Ishihara Sangyo Co., Ltd.)
Particle size: 2 mm, titanium oxide content: 95% by weight) was mixed with the adsorbent 12 at 40% by weight, and 20 g /
After filling m ² , the filter 10 was obtained by stacking the nonwoven fabrics 16 and 17 forming the dust removal layer 15 on the front and back surfaces of the nonwoven fabric 13. Note that a hot-melt nonwoven fabric or a hot-melt powder was used to hold the adsorbent 12 and the photocatalyst particles 14 on the nonwoven fabric 13.

The filter 10 obtained in this manner is folded, and the filter 10 is housed in the cartridge case 21 in a state where the one end 10a in which the photocatalyst 14 and the adsorbent 12 are mixed is exposed to the outside. Fig. 3
The filter cartridge 20 shown in FIG.

As shown in FIG. 1, as the deodorizing device 1, together with the light source 30, the ventilation holes 4 of the vehicle air conditioner are provided.
0, and subjected to a deodorizing performance test described later. The light source 30 is an ultraviolet lamp having a center wavelength of 365 n.
m of ultraviolet light is applied to the cartridge case 21 of the filter 10.
Irradiated on the exposed portion 10a.

Embodiment 2 A filter 10 having the same size and structure as the above embodiment.
In producing the nonwoven fabric 13, the nonwoven fabric 13 forming the deodorizing layer 11 is formed.
On the other hand, the portion that fits in the cartridge case 21 is filled with the same adsorbent 12 as in the above embodiment at 50 g / m ^2, while the portion 10 a exposed from the cartridge case 21 is of the same type having a particle size of 0.1 mm. Of photocatalyst 14 mixed at 3% by weight with respect to adsorbent 12 was filled at 50 g / m ² . Then, after the nonwoven fabrics 16 and 17 as the dust removing layer 15 are stacked on both sides of the nonwoven fabric 13,
The same filter cartridge 20 was obtained by storing it in a folded state in the cartridge case 21.

Embodiment 3 A filter 10 having the same size and structure as the above embodiment.
In preparing the cartridge, the portion accommodated in the cartridge case 21 is filled with the same adsorbent 12 as in the above embodiment at 100 g / m ² while the cartridge case 21 is filled.
For the portion 10a exposed from the surface, a granule having a particle size of 3 mm is prepared using titanium oxide powder (ST-31 manufactured by Ishihara Sangyo Co., Ltd.), and this granule is used as a photocatalyst 14 for the adsorbent 12. 100 g / m ^{2 of} a mixture containing 70% by weight
Filled. Then, similarly, the nonwoven fabric 1 as the dust removal layer 15
After 6 and 17 were stacked, the same filter cartridge 20 was obtained by storing it in a folded state in the cartridge case 21.

Embodiment 4 A filter 10 having the same size and structure as the above embodiment.
In preparing the cartridge, the portion accommodated in the cartridge case 21 is filled with the same adsorbent 12 as in the above embodiment at 100 g / m ^2, while the cartridge case 21 is filled.
The portion 10a exposed from the surface was formed into a granule having a particle diameter of 2 mm using titanium oxide powder (ST-31 manufactured by Ishihara Sangyo Co., Ltd.), and this was mixed as a photocatalyst 14 with 70% by weight based on the adsorbent 12. This was filled with 100 g / m ² , and nonwoven fabrics 16 and 17 were similarly stacked as a dust removal layer 15, and then stored in a cartridge case 21 in a folded state to obtain a similar filter cartridge 20.

Embodiment 5 A filter 10 having the same size and structure as the above embodiment.
In producing the nonwoven fabric 13, the nonwoven fabric 13 forming the deodorizing layer 11 is formed.
On the other hand, the portion that fits in the cartridge case 21 is filled with the same adsorbent 12 as in the above embodiment at 20 g / m ^2, while the portion 10a exposed from the cartridge case 21 is the same type having a particle size of 0.05 mm. Of the photocatalyst 14 mixed with 80% by weight of the adsorbent 12 was filled at 20 g / m ² . And, similarly, the dust removing layer 15
After the non-woven fabrics 16 and 17 are stacked on both sides of the non-woven fabric 13, the filter 10 thus obtained is folded, and the filter 10 is housed in the cartridge case 21 with its one end 10a exposed. The same filter cartridge 20 was obtained.

Embodiment 6 A filter 10 having the same size and structure as the above embodiment.
In producing the nonwoven fabric 13, the nonwoven fabric 13 forming the deodorizing layer 11 is formed.
On the other hand, the portion that fits in the cartridge case 21 is filled with the same adsorbent 12 as in the above embodiment at 20 g / m ^2, while the portion 10 a exposed from the cartridge case 21 is the same type of photocatalyst having a particle size of 5 mm. 14 mixed with 80% by weight of adsorbent 12
0 g / m ^{2 was} charged. Similarly, after the nonwoven fabrics 16 and 17 as the dust removing layer 15 are stacked on both sides of the nonwoven fabric 13 and stored in the cartridge case 21 in a folded state, a similar filter cartridge 20 having the exposed portion 10a of the filter is obtained. Was.

Example 7 In producing a filter 10 having the same size as the above example, a coating agent containing titanium oxide (photocatalyst) (ST-ST manufactured by Ishihara Sangyo Co., Ltd.) was applied to the entire nonwoven fabric 13 forming the deodorizing layer 11. K01) after applying 30 g / m ² ,
20 g / m ^{2 of the} same adsorbent 12 as in each of the above examples was filled, and nonwoven fabrics 16 and 17 as dust removal layers 15 were stacked,
The filter 10 thus obtained was folded and folded and housed in a cartridge case 21 with the one end side portion 10a exposed to obtain a similar filter cartridge 20. The coating agent uses a silicate-based inorganic binder having a solid content of 10% by weight, and has a titanium oxide content of 80% by weight in the solid content.

Example 8 In producing a filter 10 having the same size as in the above example, the same coating agent as in Example 7 was applied to only the portion 10a of the nonwoven fabric 13 exposed from the cartridge case 21 at a rate of 30 g / m ² . The same non-woven fabric 13 forming the deodorizing layer 11 was filled with the same adsorbent 12 as in the above examples at 20 g / m ² . Then, the non-woven fabrics 16 and 17 as the dust removing layer 15 were similarly overlapped and stored in the cartridge case 21 in a folded state to obtain a similar filter cartridge 20.

Example 9 In producing a filter 10 having the same size as that of the above-described embodiment, the contact surface of one of the nonwoven fabrics 16 forming the dust removing layer 15 with the adsorbent 12, ie, the entire inner surface side, was the same as in Example 7. After applying the coating agent at 30 g / m ² , the same adsorbent 12 as in each of the above embodiments is filled with 20 g / m ^{2 over the} entire non-woven fabric 13 forming the deodorizing layer 11. The nonwoven fabric 16 to which the coating agent was applied was overlaid. Then, the filter 10 thus obtained was folded, and the filter 10 was housed in a cartridge case 21 with the one end portion 10a of the filter 10 exposed to obtain a similar filter cartridge 20.

Embodiment 10 In producing a filter 10 having the same size as that of the above embodiment, the inner surface of one of the nonwoven fabrics 16 on which the dust removing layer 15 is formed, that is, the portion exposed from the cartridge case 21 of the contact surface with the adsorbent 12. After applying 30 g / m ^{2 of the} same coating agent as in Example 7 to only 10a, deodorizing layer 1
1 is filled with the same adsorbent 12 as in the above embodiments at 20 g / m ² , the nonwoven fabric 16 and the other nonwoven fabric 17 are stacked, and the filter 10 thus formed is folded. After that, one end part 1
The same filter cartridge 20 was obtained by storing the cartridge in a cartridge case 21 with 0a exposed.

Example 11 In producing the filter 10 having the same size as that of the above example, only the portion 10a of the nonwoven fabric 13 exposed from the cartridge case 21 had a solid content of 3% by weight, and the After applying a coating agent having a titanium content of 90% by weight to 100 g / m ² , the same non-woven fabric 13 forming the deodorizing layer 11 was filled with the same adsorbent 12 as in each of the above examples at 20 g / m ² . Then, after the nonwoven fabrics 16 and 17 as the dust removing layer 15 were stacked, they were stored in a cartridge case 21 in a folded state to obtain a similar filter cartridge 20.

Example 12 In producing a filter 10 having the same size as in the above example, only the portion 10a of the nonwoven fabric 13 exposed from the cartridge case 21 had a solid content of 40% by weight, and the After applying a coating agent having a titanium content of 5% by weight to 100 g / m ² , the same non-woven fabric 13 forming the deodorizing layer 11 is filled with the same adsorbent 12 as in each of the above embodiments at 20 g / m ² , The nonwoven fabrics 16 and 17 as 15 were stacked, and the filter 10 thus obtained was stored in a cartridge case 21 in a folded state, whereby a similar filter cartridge 20 having an exposed portion 10a was obtained.

Example 13 In producing a filter 10 having the same size as that of the above-described example, the outer surface of one of the nonwoven fabrics 16 on which the dust removal layer 15 is formed, that is, the entire surface on the side away from the adsorbent 12 held by the nonwoven fabric 13 Then, the same coating agent as in Example 7 was added to 30
g / m ^2, and then a nonwoven fabric 1 for forming a deodorizing layer 11
3, the same adsorbent 12 as in each of the above examples was added in an amount of 20 g /
m ² , and the other non-woven fabric 16
And the nonwoven fabric 16 coated with a coating agent, respectively, and then the obtained filter 10 is folded and folded into a cartridge case 21 with the one end portion 10a of the filter 10 being exposed. Was obtained.

COMPARATIVE EXAMPLE 1 In preparing a three-layer filter, the deodorizing layer 11 was used.
Is filled with the same adsorbent 12 as used in each of the above examples at 20 g / m ² , and the nonwoven fabrics 16 and 17 as the dust removing layer 15 are overlapped on both front and back surfaces, and then folded and folded. The filter cartridge was entirely housed in the cartridge case 21 without being exposed to the outside to obtain a filter cartridge having no exposed portion 10a of the filter.

Comparative Example 2 In preparing a filter having a three-layer structure, the deodorizing layer 11 was used.
Is filled with the same adsorbent 12 as used in each of the above examples at 20 g / m ² , and the nonwoven fabrics 16 and 17 as the dust removing layer 15 are overlapped on both front and back surfaces, and then folded and folded. By storing the filter in the cartridge case 21 with its one end exposed to the outside, a filter cartridge was prepared in which the filter had an exposed portion 10a but no photocatalyst was added to this portion.

Performance test Each of the filter cartridges thus obtained was
As shown in FIG. 1, together with a light source 30 for irradiating an ultraviolet ray having a center wavelength of 365 nm, the light source 30 is attached to a vent hole 40 of an air conditioner mounted on an automobile, and a performance test is performed to determine a deodorizing function and an adsorption / deodorizing performance. The playback function was evaluated.

That is, the filter cartridge containing the filter having the structure shown in the above embodiment and the comparative example is attached to the air-conditioner vent 40 of the test vehicle, and the vehicle is driven immediately after the vehicle with the diesel engine running on a general road. The sensory evaluation of the exhaust gas odor of the preceding vehicle flowing into the passenger compartment of the automobile from the air conditioner was carried out by four evaluators in the passenger compartment. At this time, the exposed part 1 of each filter
It is needless to say that ultraviolet light from the light source 30 is applied to Oa (except for Comparative Example 1).

In the sensory evaluation of the odor, 0 was given when there was no odor, 1 was an odor that was barely detectable, 2 was an odor that barely distinguished the type of odor, and 3 was an odor that was easily distinguishable. Assuming that a relatively strong odor was 4 and a more intense odor was 5, the deodorizing performance of each filter was determined by an average value of four evaluators.

Then, together with the initial deodorizing performance immediately after the start of the test, the deodorizing performance after traveling about 20,000 km on a general road was determined, and the regeneration function of the adsorption / deodorizing performance was evaluated by comparing with the initial deodorizing performance. Table 1 shows the results.

[0064]

[Table 1]

As is evident from the results shown in Table 1, the deodorizing apparatuses of Examples 1 to 13 show good initial performance, in which the type of odor can be barely discriminated, or more. The deodorizing performance after traveling about 20,000 km is the same as the initial performance or slightly deteriorated. The photocatalyst functions effectively and the decomposition reaction of the adsorbed component proceeds smoothly, and the adsorption / deodorizing performance It was also confirmed that the playback function was excellent.

On the other hand, the exposed portion 10a of the filter
In the deodorizing apparatus of Comparative Example 1 having no exposed portion 10a and no photocatalyst included in the exposed portion 10a, the initial deodorizing performance was not inferior to those of Examples 1 to 13 above, Does not work effectively,
It was found that the regenerative function was inferior, and the desired deodorizing performance could not be maintained for a long period of time.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view showing the structure of a deodorizing apparatus according to one embodiment of the present invention.

FIGS. 2A to 2C are schematic cross-sectional views of respective filters showing an embodiment of the present invention.

FIG. 3 is a perspective view illustrating a shape example of a cartridge containing a filter as another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Deodorizing device 10 Filter 10a Exposed part 11 Deodorizing layer 12 Adsorbent particle (adsorbent) 14 Photocatalyst particle (photocatalyst) 15 Dust removing layer 13, 16, 17 Nonwoven fabric 21 Cartridge case 30 Light source 40 Vent (air conditioning device)

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B01D 53/81 F24F 13/02 Z F24F 3/16 B01D 53/34 116B 13/02 (72) Inventor Ei Hiroki Yamaki 2 Takara-cho, Kanagawa-ku, Yokohama-shi, Kanagawa Prefecture F-term (reference) 3L053 BD03 3L080 AE05 4C080 AA05 BB02 CC01 HH05 JJ04 JJ05 KK08 LL10 MM05 QQ15 4D002 AB02 BA04 BA14 CA07 DA41 DA45 DA01 GB01 FA01 GB01 HA01 4D012 CA09 CA10 CA12 CB03 CB13 CD05 CE03 CF10 CG01 CG04 CG05 CG06 CH01 CH05

Claims (11)

[Claims] 1. A deodorizing device comprising a filter containing an adsorbent, which is attached to a vent of various air conditioners and adsorbs odor components contained in air passing through the vent to deodorize the filter. A light source that includes a photocatalyst together with the adsorbent, is disposed inside the vent hole in a state where the photocatalyst is partially exposed to the outside of the device, and irradiates the exposed portion of the filter with light including a wavelength that activates the photocatalyst. A deodorizing device comprising: 2. The deodorizing device according to claim 1, wherein the adsorbent contains activated carbon. 3. The deodorizing device according to claim 1, wherein the photocatalyst contains titanium oxide. 4. The deodorizing device according to claim 1, wherein the basis weight of the photocatalyst in the exposed portion of the filter is larger than that in the device. 5. The deodorizing apparatus according to claim 1, wherein the photocatalyst is included only in an exposed portion of the filter. 6. The deodorizing apparatus according to claim 1, wherein the basis weight of the photocatalyst in the exposed portion of the filter is 3 to 70% by weight of the basis weight of the adsorbent. 7. The filter according to claim 1, wherein the filter has a three-layer structure including a nonwoven fabric serving as a deodorizing layer holding adsorbent particles and a nonwoven fabric serving as a dust removing layer provided on both sides thereof. Item 7. A deodorizing device according to any one of Items 6. 8. The photocatalyst is a granule or a granulated product,
The deodorizing apparatus according to claim 7, wherein the adsorbent particles are mixed in the deodorizing layer. 9. The deodorizing apparatus according to claim 7, wherein at least one of the nonwoven fabrics forming the deodorizing layer and the dust removing layer is coated or impregnated with a coating agent containing a photocatalyst or a precursor thereof. 10. The deodorizing apparatus according to claim 1, wherein at least a portion of the filter located inside the apparatus is attached to a vent hole while being housed in a cartridge case. . 11. The deodorizing apparatus according to claim 1, wherein a seal is provided on a portion of the filter that extends from the inside to the outside of the apparatus.