JP2000107544A - Air cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air cleaner which can cope with the deodorizing of all odorous components generated in a room by a plurality of different deodorizing means and especially repress the generation of odors at the start-up of the air cleaner. SOLUTION: In an air cleaner, which has a dust collection part 4 collecting particulates, such as dust, in airflow at the suction side of an air blower 7 and has a deodorizing part formed by disposing an adsorbent body 8 with a photocatalyst, on which the photocatalyst and a odorous component adsorbent are supported, and a photocatalyst exciting light source 9 so as to oppose to each other at the delivery side, a first dust collecting and deodorizing body 3 is disposed at the front part of the dust collection part 4 to collect large dust in the airflow and to adsorb or decompose odorous components, and a second deodorizing body 5 is disposed at the rear part of the dust collection part 4 to adsorb the dust components passing through the dust collection part 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air purifier for collecting and purifying dust and the like in the air, and more particularly to an air purifier having a plurality of deodorizing means for efficiently adsorbing and decomposing indoor odor components. It is about.

[0002]

2. Description of the Related Art A conventional air purifying apparatus of this kind, for example, an air purifying apparatus which performs a deodorizing action using a photocatalyst, is constructed as shown in FIG. I will explain while.

FIG. 7 is a schematic sectional view of a conventional air purifying apparatus having a light deodorizing function. The basic configuration is such that a dust collecting section is provided on a suction side of a blower and a deodorizing section using a photocatalyst is provided on a discharge side. are doing.

In FIG. 7, reference numeral 1 denotes a casing, in which a suction grill 2 is detachably provided as a suction port on the suction side of a blower 7, and a high-performance dust collecting filter 4 is disposed on the rear surface thereof. It constitutes a dust part. On the discharge side, a titanium oxide as a photocatalyst, an adsorbent with a photocatalyst 8 in which zeolite is supported on a honeycomb-shaped carrier as an adsorbent, an ultraviolet lamp 9 provided to face the adsorbent with the photocatalyst 8, and a photocatalyst A reflector 9a for efficiently irradiating the adsorbent 8 with ultraviolet rays constitutes a deodorizing section. further,
Above it, a blow grill 10
Are arranged.

An air purifying apparatus of this type is disclosed in Japanese Patent Application No. 9-266136 filed by the present applicant as an air purifying apparatus having a light deodorizing function. Also, although slightly different from this, an air purifying apparatus in which a dust collecting section (electrical dust collecting type) and a light deodorizing section are disposed on the suction side of a blower is disclosed in Japanese Patent Application Laid-Open No. 10-61986. is there.

[0006]

However, in the above-mentioned conventional air purifying apparatus, especially when a high-performance hepa-dust filter is used in the dust-collecting portion, the filter is formed of a non-woven fabric made of a special resin fiber in a pleated shape (pleated). The dust collection area has been greatly expanded to provide high dust collection efficiency and long service life, but odor components also adhere and accumulate along with fine dust, tobacco smoke, and various bacteria in the ventilation flow. Tend to go on. These odor components and the odor components passing through the dust filter are deodorized in the deodorizing section by the photocatalyst at the later stage, but the decomposition reaction of the odor components by the photocatalyst is relatively slow and is constant to deodorize indoor odor components. Time is needed.

Therefore, at the start of the operation of the air purifying device, the odor molecules adhering to the dust collecting filter together with the dust and the like are released along with the ventilation flow, and are released into the room without being sufficiently deodorized in the deodorizing section by the photocatalyst. There was a problem of feeling.

Also, in the deodorizing section by the photocatalyst, ultraviolet rays are radiated from one side of the adsorbent with a photocatalyst formed in a honeycomb shape by an ultraviolet lamp serving as a light source for exciting the photocatalyst, so that the photocatalyst farthest from the light source is exposed. The back surface of the adsorbent is not always sufficiently irradiated with light. In particular, the adsorbed odor component is not sufficiently decomposed at the peripheral portion of the back surface, and the adsorbent with a photocatalyst may remain without being regenerated.

Such undecomposed odor molecules are also discharged from the blowout grill together with the odor molecules desorbed from the dust collecting filter at the time of starting the operation of the air purifying device, causing a problem of unpleasant odor.

Furthermore, zeolite (copper ion-exchanged zeolite) used as an adsorbent for an adsorbent with a photocatalyst:
Cu-ZSM5) has an average pore size of 5 to 7 angstroms, and has an aromatic (eg, cosmetics, thinner, adhesive, etc.) or polymer (eg, higher alcohol, ester) having a larger pore size. Etc.) has a problem that it is difficult to adsorb the odor component.

The present invention has been made in view of the various problems described above, and a plurality of different deodorizing means can cope with the deodorization of all odor components generated indoors.
In particular, suppress the generation of odor at the start of operation of the air purifier,
It is an object of the present invention to provide an air purifying device capable of maintaining a high deodorizing effect for a long time.

[0012]

In order to achieve the above object, an air purifying apparatus according to the present invention captures fine particles such as dust in a ventilation flow by operating a blower. In an air purifying apparatus having a dust collecting section, a deodorizing section in which an adsorbent with a photocatalyst carrying a photocatalyst and an odor component adsorbent and a photocatalyst excitation light source are opposed to each other, a large amount of air flows in front of the dust collecting section. A first dust collecting and deodorizing body for collecting dust and adsorbing or decomposing odor components is provided.

[0013] According to this configuration, in the preceding stage of the air purifying device, the odor component in the ventilation stream is removed by adsorption or decomposition, and also has a role as a pre-filter for collecting relatively large dust and dirt. Accordingly, it is possible to reduce the dust collection load on the subsequent dust collection filter and the deodorization load on the deodorizing section by the photocatalyst.

According to a second aspect of the present invention, a dust collecting portion for collecting fine particles such as dust in a ventilation flow is provided on a suction side of a blower, and a photocatalyst and an odor component adsorbent are supported on a discharge side. In an air purifying apparatus having a deodorizing section in which an adsorbent with a photocatalyst and a photocatalytic excitation light source are opposed to each other, a large dust in a ventilation flow is collected at the front of the dust collecting section, and a first odor component is adsorbed or decomposed. And a second deodorizer that adsorbs the odor component in the ventilation flow passing through the dust collector is disposed at the rear.

According to this configuration, in addition to the deodorizing section using the photocatalyst, the first dust collecting deodorizing body and the second deodorizing body are disposed before and after the dust collecting section. It is possible to deal with the deodorization of any odor generated indoors by the deodorizing means. In addition to reducing the dust collection load on the dust collection filter and the deodorization load on the deodorization section due to the photocatalyst, the emission of odor from odor components attached to the dust collection filter together with dust etc., especially at the start of operation, should be suppressed. Becomes possible.

According to a third aspect of the present invention, a dust collecting portion for collecting fine particles such as dust in a ventilation flow is provided on a suction side of a blower, and a photocatalyst and an odor component adsorbent are supported on a discharge side. In an air purifying apparatus having a deodorizing unit in which an adsorbent with a photocatalyst and a photocatalytic excitation light source are opposed to each other, a second deodorizing unit that adsorbs odor components in an airflow passing through the dust collecting unit is provided at the rear of the dust collecting unit. The first dust collecting and deodorizing body that adsorbs or decomposes odor components is disposed after the deodorizing section and near the blowout grill.

According to this configuration, it is possible to suppress the emission of odor, which has become a problem especially at the start of the operation of the air purifying device. That is, the second deodorant deodorizes the odor component attached together with the dust and the like collected by the dust collection filter of the dust collection unit, and furthermore, the odor component adsorbed by the photocatalyst-attached adsorbent and left undecomposed remains. In addition to the decomposition by irradiation from the ultraviolet lamp, the first dust collecting and deodorizing body is deodorized by adsorption or decomposition in the vicinity of the blowing grill, so that the emission of odor can be further suppressed.

According to a fourth aspect of the present invention, in the air purifying apparatus according to any one of the first to third aspects, the first dust collecting and deodorizing body is made of nylon, rayon, cotton, or the like. It is obtained by supporting a metal phthalocyanine derivative as a transition metal chelate compound on a net or a nonwoven fabric.

According to this structure, relatively large dust and the like in the ventilation flow are collected by the nylon net or the like,
Odor molecules in the ventilation stream can be adsorbed by the supported metal phthalocyanine derivative or decomposed by enzymatic oxidation to deodorize. Moreover, the dust removal and the deodorizing effect can be regenerated by appropriate washing with water.

Further, the invention described in claim 5 is the air purifying apparatus according to claim 2 or 3,
The second deodorant is obtained by surrounding a simple substance such as activated carbon or zeolite or a composite thereof with a nonwoven fabric.

According to this configuration, a low-cost deodorant can be formed. In particular, the use of activated carbon makes it possible to form an aromatic or polymer based on the first dust collecting deodorizer in the former stage and the deodorizing unit using the photocatalyst in the latter stage. The ability of the system to adsorb odorous components is improved.

Further, according to a sixth aspect of the present invention, in the air purifying apparatus according to any one of the first to fifth aspects, the adsorbent carried on the adsorbent with a photocatalyst comprises zeolite and activated carbon. In a weight ratio of 3: 1 to 1: 3.

According to this configuration, even in the deodorizing section by the photocatalyst, the ability to adsorb aromatic or high molecular odor components is improved, so that an extremely high deodorizing effect can be obtained.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of an air purifying apparatus according to the present invention will be described with reference to FIGS. 1 to 6, and components common to the above-mentioned prior art will be described with common reference numerals.

[First Embodiment] A first embodiment of the air purifying apparatus of the present invention will be described in detail with reference to FIGS.

FIG. 1 is a schematic sectional view showing an air purifying apparatus according to an example of the first embodiment of the present invention, and FIG. 2 is an air purifying apparatus according to another example of the first embodiment of the present invention. FIG. 2 is a schematic cross-sectional view showing the device, and the basic configuration of the device is that the former arranges a first dust collecting and deodorizing body and a dust collecting unit on the suction side of a blower, and arranges a deodorizing unit by a photocatalyst on the discharge side. On the other hand, the latter is provided with a first dust collecting and deodorizing body, a dust collecting section, and a deodorizing section using a photocatalyst on the suction side of the blower.

In FIG. 1, a casing 1 of an air purifier is provided with a suction grill 2 at a suction port and a blow grill 10 at a blow port, all of which are detachable. A sirocco fan is provided inside the casing 1 as a blower 7 for circulating air. On the suction side of the blower 7, a first dust collecting and deodorizing body 3 and a high-performance dust collecting filter 4 as a dust collecting portion are arranged in order from the upstream side of the ventilation flow behind the suction grill 2, and the discharge side is provided. , An ultraviolet lamp 9 as an excitation light source for exciting the photocatalyst and a reflector 9a thereof are provided from below to face the adsorbent 8 with a photocatalyst, and constitute a deodorizing section.

FIG. 2 is different from FIG.
The difference is that the deodorizing section by the photocatalyst is arranged on the suction side of the blower 7, and the other parts are common. Therefore, the following description will be mainly made with reference to FIG.

The first dust collecting and deodorizing body 3 is obtained by supporting a metal phthalocyanine derivative such as iron, cobalt, manganese or the like as a fiber metal chelate compound on a net or nonwoven fabric of nylon, rayon, cotton, wool or the like. FIG.
FIG. 2 is a front view showing an example of a first dust collecting and deodorizing body. In the present embodiment, a 6-nylon net made of honeycomb woven (34 mesh) supporting iron phthalocyanine is stretched over the entire filter frame 3a. (Partially omitted) and housed in a sandwich shape.

The iron phthalocyanine is supported on the nylon net by adding an iron phthalocyanine derivative to an aqueous alkali solution in which potassium hydroxide is dissolved to prepare a 1% concentration solution. The nylon net is immersed in the solution, and then diluted with hydrochloric acid. , And dried by warm air. In the experiment, 6
6-nylon was superior to 6-nylon in the loading ratio of iron phthalocyanine.

The first dust collecting and deodorizing body 3 includes a dust collecting filter 4
Is disposed at the front of the filter and serves as a pre-filter that collects relatively large dust and the like in the ventilation flow and reduces the dust collection load on the high-performance dust collection filter 4 at the subsequent stage. The metal phthalocyanine derivative can be used to adsorb odor molecules in the ventilation stream or decompose them by enzymatic oxidation to deodorize them.

In particular, it has an extremely high deodorizing effect for decomposing sulfur-based malodorous components such as hydrogen sulfide, methyl sulfide, methyl mercaptan, and ethyl mercaptan, and can regenerate dust-removing and deodorizing functions by appropriate washing with water. However, the first dust removing and deodorizing body tends to have a slightly inferior effect on deodorizing aromatic odor components and acetaldehyde odor components such as tobacco odor.

The dust collecting filter 4 as a dust collecting portion is a high-performance hepa filter in which a non-woven fabric made of a special resin fiber is formed into a pleated (pleated) shape and the dust collecting area is greatly increased. Dust collection efficiency of 99.97%), and antibacterial filter is used on the filter surface, so it absorbs and removes pollen and cigarette smoke, nitrogen oxides, house dust, viruses and other bacteria in the air. Along with
They have the effect of inactivating them (suppressing their activities) and suppressing their fertility.

The adsorbent 8 with photocatalyst is formed in a honeycomb shape for the purpose of increasing the contact surface area with low ventilation resistance. Zeolite as an adsorbent and titanium oxide as a photocatalyst are supported on the surface of a honeycomb carrier made of a metal such as aluminum. It is a thing. The adsorbent with a photocatalyst may be made of activated carbon or ceramic in a honeycomb shape or the like, and a photocatalyst may be added or kneaded.

As an excitation source for exciting the photocatalyst, a straight tube type ultraviolet lamp 9 is provided so as to face the adsorbent 8 with the photocatalyst. The ultraviolet lamp 9 is a cold-cathode tube-type discharge lamp, and emits light containing ultraviolet rays in a near ultraviolet region mainly having a wavelength around 365 nm. Further, the reflection plate 9a is used to transmit the light from the ultraviolet lamp 9 to the adsorbent 8
The adsorbent with photocatalyst 8, the ultraviolet lamp 9, and the reflection plate 9a form a deodorizing section.

Tables 1 and 2 show the results of a short-time deodorizing performance test in one example of the first embodiment and other deodorizing methods. Table 1 shows the results of the deodorizing performance test for the roast meat odor (trimethylamine), and Table 2 shows the results of the deodorizing performance test for the garbage odor and the pet odor (hydrogen sulfide).

As the first dust collecting and deodorizing body, two types of honeycomb woven (34 mesh and 53 mesh) 6-nylon nets carrying iron phthalocyanine are used. The deodorizing performance in a short time was evaluated as compared with the case of using the deodorizing section alone or the activated carbon alone.

[0038]

[Table 1]

As is clear from Table 1, in the present embodiment in which two types of nylon nets (34 and 53 mesh) differing only in the weaving density and a deodorizing section using a photocatalyst are used in combination, one minute after the odor of the roast meat (trimethylamine) has elapsed. Shows a deodorizing effect of 80% or more in each case, and it is recognized that an excellent deodorizing effect is exhibited in a short time as compared with the case of using the deodorizing unit using the photocatalyst alone.

[0040]

[Table 2]

As is apparent from Table 2, the garbage odor and pet odor (hydrogen sulfide) according to the present embodiment under the same conditions.
The deodorizing effect after 1 minute has also shown a deodorizing performance of about 80%, and it is recognized that a particularly excellent deodorizing effect is exhibited in a short time as compared with the case of using the photocatalytic deodorizing section alone or activated carbon alone. Can be

Next, the operation of the air purifying apparatus of this embodiment will be described with reference to FIG.

In the above configuration, when the operation switch (not shown) of the air cleaning device is turned on and the blower 7 is operated,
Air containing dust and odor components in the room is sucked into the casing 1 from the suction grill 2, and when passing through the first dust collecting and deodorizing body 3 in a laminar flow state, relatively large dust and the like in the ventilation flow are removed. While being collected, sulfur-based odor components such as hydrogen sulfide and methyl mercaptan and odor components such as ammonia are deodorized by decomposition or adsorption.

Next, when the dust passes through the high-performance hepa dust filter 4, which is a dust collecting part, most of the dust and the like are removed, and viruses and other germs are also adsorbed and removed by the antibacterial material and inactivated.

The primary deodorized air and the highly dedusted air are sucked in from the inlet 6 of the blower (sirocco fan) 7, accelerated by the impeller 7a, and discharged toward the upper photocatalytic deodorizing section. The air containing a part of the odor component accelerated by the impeller 7a and discharged in a turbulent state is efficiently brought into contact with the honeycomb-shaped adsorbent with photocatalyst 8 and is ventilated.

At this time, the residual odor component is adsorbed by the adsorbent and the light containing ultraviolet rays is irradiated on the photocatalyst by the ultraviolet lamp 9, so that the photocatalyst is in an excited state (active state).
Then, the residual odor component adsorbed by the oxidizing power is efficiently decomposed and deodorized (accurately, the generated hydroxyl radical decomposes the organic substance into carbon dioxide and water).

Also, titanium oxide as a photocatalyst has antibacterial properties comparable to inorganic antibacterial materials even with a weak ultraviolet light amount, and also has a sterilizing effect on ultraviolet rays. Even if germs and the like are generated and multiplied, the deodorizing and antibacterial treatment can be performed in the deodorizing section near the blowout grill 10, which is the final processing stage on the discharge side. At this time, since the adsorbent is regenerated by the oxidizing power of the photocatalyst, the deodorizing effect is maintained for a long time.

In this way, the clean air, which has been primarily deodorized and dedusted on the suction side of the blower, is further deodorized and antibacterial treated on the discharge side, and is discharged from the outlet grill 10.

Therefore, in the air purifying apparatus of the present embodiment, the first dust collecting and deodorizing body which can be regenerated by water washing any number of times and which is different from the deodorizing method using the photocatalyst is disposed at the preceding stage.
It removes odor components in the ventilation stream by adsorption or decomposition, and also serves as a pre-filter to collect relatively large dust and dirt. It is possible to reduce the deodorizing load on the section.

[Second Embodiment] FIG. 3 is a schematic sectional view showing an air cleaning apparatus according to a second embodiment of the present invention.
In the present embodiment, only points different from the first embodiment will be described.

In FIG. 3, inside the casing 1 of the air purifying device, a first dust collecting and deodorizing body 3 is arranged in the suction side of the blower 7 in order from the upstream side of the ventilation flow, and a high-performance collecting unit as a dust collecting unit. A dust filter 4 is provided, and further behind the second deodorizing body 5 that adsorbs odor components in the ventilation flow passing through the dust collecting portion.
Are arranged. Further, on the discharge side, a deodorizing section composed of an adsorbent 8 with a photocatalyst, an ultraviolet lamp 9 and a reflecting plate 9a is disposed.

The second deodorizing body 5 is one in which an adsorbent such as activated carbon or zeolite or a complex thereof is covered with a nonwoven fabric formed of polypropylene, polyester or the like. FIG. 6 shows an example of the second deodorizing body. FIG.

Referring to FIG. 6, in the present embodiment, 30 to 60 mesh granular activated carbon is uniformly and dry-adhered using reticulated urethane foam having low pressure loss and high contact efficiency as a carrier. A second deodorant body 5 is formed by using a sheet-like activated carbon filter 5b to which a large amount is attached, and surrounding the bag with a bag-shaped nonwoven fabric 5a made of polypropylene.

Next, the operation of the air purifying apparatus of this embodiment will be described with reference to FIG.

Operation switch (not shown) of the air cleaning device
Is turned on and the blower 7 is operated, the air containing dust and odor components in the room is sucked into the casing 1 from the suction grill 2 and first passes through the first dust collecting and deodorizing body 3 in a rectified (laminar flow) state. At this time, relatively large dust and the like in the ventilation flow are collected, and in particular, odor components such as sulfur odor components and ammonia are deodorized by decomposition or adsorption.

Next, when passing through the high-performance hepa dust filter 4 which is a dust collecting part, most of the dust and the like are removed, and viruses and various germs are also adsorbed and removed by the antibacterial agent to be inactivated.

When the primary deodorized and highly dust-removed air further passes through the second deodorant 5 (activated carbon adhered), it is difficult to adsorb and remove the remaining odor components, especially the first dust deodorant 3. In addition to aromatic (cosmetics, thinner, adhesives, etc.) and polymer (higher alcohols, esters, etc.) odor components, tobacco odors such as acetaldehyde are also deodorized to some extent by adsorption.

The air that has passed through the second deodorizing body 5 is further sucked through the inlet 6 of the blower 7, accelerated by the impeller 7a, and discharged toward the upper photocatalytic deodorizing section. The air containing the remaining odor component accelerated by the impeller 7a and discharged in a turbulent state is efficiently brought into contact with the honeycomb-shaped adsorbent with photocatalyst 8 and is ventilated.

At this time, the residual odor component that was not completely deodorized even in the first and second deodorizing bodies is adsorbed by the adsorbent, and the light containing ultraviolet rays is irradiated from the ultraviolet lamp 9 to the photocatalyst. It becomes an excited state (active state), and the residual odor component adsorbed by its oxidizing power is efficiently decomposed to make it odorless, and antibacterial treatment is also performed.

The clean air that has been subjected to primary deodorization, dust removal, and secondary deodorization on the suction side of the blower in this way is further deodorized and antibacterial treated on the discharge side, and is discharged from the blowout grill 10. Therefore, in this embodiment, in addition to the deodorizing section using the photocatalyst, the first dust collecting deodorizing body and the second deodorizing body are disposed before and after the dust collecting section. By means, it becomes possible to cope with deodorization of any odor generated indoors.

In addition, since the load on the dust collecting filter and the deodorizing load on the deodorizing section due to the photocatalyst can be reduced, the life of the dust collecting filter can be extended and the adsorbent with a photocatalyst can be reduced in size. Furthermore, particularly at the start of operation, the emission of odor from the odor component adhering to the dust collecting filter together with the dust and the like can be effectively suppressed by disposing the second deodorizing body.

[Third Embodiment] FIG. 4 shows a third embodiment of the present invention.
It is an outline sectional view showing the air purifying device of an embodiment.
In the present embodiment, only the points that are different from the first and second embodiments will be described.

In FIG. 4, inside the casing 1 of the air purifying device, a high-performance dust collecting filter 4 as a dust collecting portion is disposed on the suction side of the blower 7 in order from the upstream side of the ventilation flow. On the other hand, a second deodorizing body 5 for adsorbing odor components in the ventilation flow passing through the dust collecting section is provided.

The discharge side is provided with an adsorbent 8 with a photocatalyst.
And a deodorizing section comprising an ultraviolet lamp 9 and a reflecting plate 9a, and a blowout grill 10 behind the deodorizing section.
Near the first odor absorbing or decomposing residual odor component
Is disposed.

The air purifying apparatus according to the present embodiment is similar to the second embodiment except that the first dust deodorizing member 3 disposed in front of the dust collecting portion on the rear surface of the suction grill 2 is eliminated. The first dust collecting and deodorizing body 3 ′ is arranged in a different shape, and is disposed in the vicinity of a blow grill 10 located behind the adsorbent 8 with a photocatalyst.

The first dust collecting and deodorizing body 3 'used in this embodiment is similar to the first dust collecting and deodorizing body 3 used in the first and second embodiments, such as nylon, rayon, cotton and the like. As a transition metal chelate compound on a net or nonwoven fabric by
A metal phthalocyanine derivative such as iron, cobalt, or manganese is supported.

However, the shape is on the discharge side of the blower 7 and is disposed in a relatively small space in the vicinity of the blowout grill 10, so that it is considerably smaller (not shown) than the shape shown in FIG. It is almost equal to the size of the outlet grill 10. In addition, the first dust collecting and deodorizing body 3 'can easily perform dust removal and regeneration of the deodorizing function by appropriate washing with water.

Further, the first dust collecting and deodorizing body 3 'is in the final processing stage of the air cleaning device, and is detachably disposed on the lower surface of the blowout grill 10, so that maintenance is easy, and Adhesion of dust and the like is extremely small, and the number of times of washing with water by the user can be greatly reduced.

Therefore, on the discharge side of the blower 7 of the present embodiment, the discharged air is ventilated in a turbulent state to the adsorbent 8 with photocatalyst and the first deodorizing body 3 ', so that the contact efficiency is further improved. As compared with the case of the first and second embodiments, the first dust collecting and deodorizing body 3 is arranged on the suction side where the air is sucked and the air is rectified (laminar flow). However, almost the same deodorizing effect can be obtained.

In addition, at the time of starting the operation of the conventional air cleaning apparatus shown in FIG. 7, it is possible to further suppress the emission of odor, which has been a particular problem. That is, with the operation of the blower 7 due to the start of the operation of the air cleaning device, the odor components that have already adhered and accumulated together with the dust and the like collected by the high-performance dust collecting filter 4 of the dust collecting section are collected by the second deodorizing body. The odor component which is deodorized and adsorbed by the photocatalyst-attached adsorbent 8 and remains undecomposed is partially decomposed by irradiation from the ultraviolet lamp 9, and further, the first odor component disposed near the blowout grill 10. Since the dust collecting and deodorizing body 3 'is deodorized by adsorption or decomposition, the emission of odor can be substantially suppressed.

[Fourth Embodiment] The fourth embodiment of the present invention is the same as the first to third embodiments, except that zeolite and activated carbon are used as adsorbents for forming the adsorbent 8 with a photocatalyst. It is blended in a ratio of 3: 1 to 1: 3 and supported on the surface of a honeycomb carrier made of aluminum or the like together with a photocatalyst (such as titanium oxide).

The zeolite (copper ion-exchanged zeolite Cu-ZSM) used as the adsorbent for the adsorbent 8 with photocatalyst
5) has an adsorption pore diameter of 5 to 7 angstroms, and is an aromatic type having a larger pore diameter (cosmetics,
It was difficult to adsorb the odor components of thinners, adhesives, etc.) and the odor components of high polymer (higher alcohols, esters, etc.), but by blending activated carbon with an adsorption pore size distribution of 10 to 20 angstroms, The ability to adsorb these odor components has been greatly improved, and odors such as cosmetic odor and thinner odor can be eliminated.

Table 3 shows the test results of the performance of deodorizing aromatic odor components with a photocatalyst when the mixing ratio of the adsorbent was changed. The deodorizing performance evaluation test was carried out by placing an air purifying device having the configuration shown in FIG. 7 in one acrylic box and attaching an adsorbent with a photocatalyst having a different mixing ratio of the adsorbent.

The measurement conditions were as follows: the temperature in the box was 25 ° C. and the humidity was 60 ° C.
After adjusting the atmosphere to a general house atmosphere of 5%, burn five cigarettes, inject 10 ppm of xylene, and operate the air purifier at an air volume of 3%.
? / Min. Then, the residual concentration of the aromatic odor component (styrene, xylene) 30 minutes after the operation was measured with a gas detector tube, and each removal rate was calculated.

[0075]

[Table 3]

As is evident from Table 3, the adsorbent supported on the adsorbent with photocatalyst was increased in the amount of activated carbon as compared with the conventional zeolite alone, so that it was difficult to remove aromatics. Styrene which is a system odor component,
The xylene removal rate is greatly improved. According to the experimental results, the mixing ratio of zeolite and activated carbon was 3: 1 to 1: 3 by weight.
It is recognized that the range within is suitable.

Therefore, by adopting this embodiment in the first to third embodiments, the same operation and effect as those of the first to third embodiments can be obtained, and the deodorization by the photocatalyst can be achieved. Also in the part, the ability to adsorb aromatic or high molecular odor components is improved, an extremely high deodorizing effect can be obtained, and the cost of the adsorbent with a photocatalyst can be reduced.

Note that the present invention is not limited to the above-described embodiment, and it goes without saying that many modifications and changes can be made to the above-described embodiment within the scope of the present invention. For example,
In the present invention, the dust collecting filter and the second deodorizing body are separated from each other. However, the present invention is not limited to this, and both may be integrated.

[0079]

As described above, according to the air purifying apparatus according to the first aspect of the present invention, the first dust collecting and deodorizing body different from the deodorizing method using the photocatalyst is disposed at the preceding stage of the air purifying apparatus. Since it is installed, it removes odor components in the ventilation flow by adsorption or decomposition, and also serves as a pre-filter that collects relatively large dust and dirt. And the deodorizing load on the deodorizing section by the photocatalyst can be reduced.

According to the air purifying apparatus of the second aspect of the present invention, in addition to the deodorizing section using the photocatalyst provided on the discharge side of the blower, dust is collected not only on the suction side of the blower but also on the preceding stage. Since the first deodorizing body and the second deodorizing body are disposed before and after the unit, it is possible to cope with the deodorization of any odor generated indoors by three-stage deodorizing means having different deodorizing methods. .

Further, since the load on the dust collecting filter and the deodorizing load on the deodorizing section by the photocatalyst can be reduced, the life of the dust collecting filter can be extended, and the adsorbent with a photocatalyst can be reduced in size. In addition, particularly at the start of operation, the emission of odor from the odor component adhering to the dust collecting filter together with dust and the like can be effectively suppressed by disposing the second deodorizing body.

According to the air purifying apparatus according to the third aspect of the present invention, of the three-stage deodorizing means,
The first dust collecting and deodorizing body is different from the invention according to claim 2,
Since it is located near the outlet grill located at the rearmost position on the discharge side of the blower, the exhaust air is ventilated in a turbulent state and the contact efficiency is improved, so that the suction air is ventilated in a laminar state. The same deodorizing effect can be obtained while having a smaller area than that provided in the front stage of the section.

In addition, at the start of the operation of the air purifying device, the second deodorant deodorizes the odor component adhering together with the dust and the like collected in the dust collecting portion, and is further adsorbed by the adsorbent with a photocatalyst. The odor component left as it is is not only decomposed by irradiation from an ultraviolet lamp, but also the first dust collecting and deodorizing body desorbs or decomposes by decomposing, so that the emission of odor can be further suppressed. In addition, since the first dust collecting and deodorizing body is disposed near the blow-out grill, which is the final processing stage, the amount of dirt and deodorizing load in the ventilation flow is small, and the number of maintenance operations by washing with water can be greatly reduced. Become.

According to the air purifying apparatus according to the fourth aspect of the present invention, relatively large dust and the like are removed by the nylon net or the like, and the odor in the aeration flow is reduced by the supported metal phthalocyanine derivative. Molecules can be decomposed and deodorized by adsorption or enzymatic oxidation. In particular, it has an extremely high deodorizing effect for decomposing sulfur-based odor components such as hydrogen sulfide, methyl sulfide, and methyl mercaptan, and enables the dust removal and the deodorizing effect to be regenerated by appropriate washing with water.

Further, according to the air purifying apparatus of the fifth aspect of the present invention, in addition to the effects of the second or third aspect, the adsorbent may be a simple substance such as activated carbon or zeolite or a composite thereof. A low-cost deodorant can be formed by covering the body with a nonwoven fabric. In particular, the use of activated carbon makes it possible to form aromatic and polymer-based deodorizers compared to the first dust-collecting deodorizer in the former stage and the deodorizing unit using the photocatalyst in the latter stage Effective for deodorizing odor components.

Further, according to the air purifying apparatus of the sixth aspect of the present invention, in addition to the effects of the first to fifth aspects, zeolite is used as an adsorbent, and the diameter of pores is larger than that of zeolite. By admixing and supporting a large activated carbon at an appropriate mixing ratio to form an adsorbent with a photocatalyst, the ability to adsorb aromatic and high-molecular odor components in the deodorizing section by the photocatalyst is improved, resulting in extremely high deodorization. The effect can be obtained, and the cost of the adsorbent with a photocatalyst can be reduced.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view illustrating a main part of an air cleaning device according to an example of a first embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view illustrating a main part of an air cleaning device according to another example of the first embodiment of the present invention.

FIG. 3 is a schematic sectional view of a main part showing an air cleaning device according to a second embodiment of the present invention.

FIG. 4 is a schematic cross-sectional view of a main part showing an air cleaning device according to a third embodiment of the present invention.

FIG. 5 is a front view showing a first dust collecting and deodorizing body of the air purifying apparatus of the present invention.

FIG. 6 is a side sectional view showing a second deodorizing body of the air purifying apparatus of the present invention.

FIG. 7 is a schematic sectional view showing a basic structure of a conventional air cleaning device having a light deodorizing function.

[Explanation of symbols]

 3, 3 'First dust collecting and deodorizing body 3b Net 4 Dust collecting filter (dust collecting part) 5 Second deodorizing body 5a Nonwoven fabric 5b Sheet activated carbon filter (activated carbon) 7 Blower 8 Adsorbent with photocatalyst 9 Ultraviolet lamp (photocatalyst) Excitation light source) 10 Blow-off grill

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Shigetoshi Mori 22-22, Nagaikecho, Abeno-ku, Osaka City, Osaka F-term (reference) 4C080 AA05 AA07 AA10 BB02 BB05 CC03 CC04 CC05 CC09 JJ03 MM02 MM04 MM05 MM19 MM24 MM28 NN01 QQ11 QQ17 QQ20 4D012 CA09 CA10 CB05 CD10 CG01 CH01 CH05 4D048 AA22 BA05X BA07X BA11X BA13X BA41X BB02 BB08 CC32 CC40 CD03 CD08 EA01 EA04 4D058 JA14 JB13 JB14 TA03A

Claims (6)

[Claims] 1. A deodorizing unit comprising: a dust collecting unit for collecting fine particles such as dust in a ventilation flow by operating a blower; an adsorbent with a photocatalyst carrying a photocatalyst and an odor component adsorbent; In the air purifying device having a portion, a first dust collecting and deodorizing body is disposed at a front portion of the dust collecting portion for collecting large dust in a ventilation flow and adsorbing or decomposing odor components. Air purifier. 2. A dust collecting section for collecting fine particles such as dust in a ventilation flow on a suction side of a blower, and a photocatalyst adsorbent carrying a photocatalyst and an odor component adsorbent on a discharge side, and a photocatalyst excitation light source opposed to the discharge side. In an air purifying apparatus having a deodorizing section, a first dust collecting and deodorizing body is disposed at a front portion of the dust collecting section for collecting large dust in an air flow and adsorbing or decomposing odor components. An air purifying apparatus, wherein a second deodorizing body for adsorbing an odor component in a ventilation flow passing through the dust collecting unit is provided at a rear portion. 3. A dust-collecting section for collecting fine particles such as dust in a ventilation flow on a suction side of a blower, and a photocatalyst adsorbent carrying a photocatalyst and an odor component adsorbent on a discharge side, and a photocatalyst excitation light source opposed to the discharge side. In the air purifying apparatus having a deodorizing section, a second deodorizing body for adsorbing the odor component in the ventilation flow passing through the dust collecting section is disposed at the rear of the dust collecting section, and after the deodorizing section. An air purifier comprising a first dust collecting and deodorizing body which adsorbs or decomposes odor components near the blowout grill. 4. The first dust collecting and deodorizing body comprises a metal phthalocyanine derivative as a transition metal chelate compound supported on a net or a non-woven fabric of nylon, rayon, cotton, or the like. An air purifying device according to any one of the above. 5. The air purifying apparatus according to claim 2, wherein the second deodorizing body is formed by surrounding a simple substance such as activated carbon, zeolite or the like or a composite thereof with a nonwoven fabric. 6. The adsorbent carried on the adsorbent with a photocatalyst comprises a mixture of zeolite and activated carbon in a weight ratio of 3: 1 to 1: 3. Item 6. An air purifying apparatus according to any one of Items 5.