JP2002143289A - Deodorizing filter externally attached on air cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a filter which can be used over a long term because its deodorization effect is not deactivated due to affection of dust, or the like, by attaching the filter for selectively deodorizing odor which must be deodorized depending on using environment on a blow-off port of an air cleaner having at least a dust removing performance as an additional function of an air cleaner which is commercially available. SOLUTION: The filter externally attached on an air cleaner has a fixing means for attaching the filter on the blow-off port of the air cleaner having at least a dust removing function. The filter has a shape of a corrugated honeycomb structure or a pleated structure in order to keep pressure loss to be low.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air purifier having at least a dust removing function and a filter for selectively deodorizing odors which are more necessary according to the use environment as an additional function of a commercially available air purifier. The present invention relates to a filter that can be used for a long period of time because the deodorizing effect is not deactivated by being attached to a sill portion due to dust and the like.

[0002]

2. Description of the Related Art In recent years, air purifiers have been widely used in homes and workplaces due to changes in living environment and heightened health consciousness. Dust collection methods of air purifiers are broadly classified into electric dust collection methods and filter filtration methods, and filter filtration methods are widely used in compact household air purifiers. In particular, the mainstream of the dust filter used in the filter filtration system is being switched from a conventional medium-performance filter to a high-performance filter, and the performance has been improved.

[0003] Such a high-performance filter captures bacteria, mold spores, viruses and the like in addition to dust such as house dust. It is said that there is a high risk of causing allergic diseases and infectious diseases. Therefore, antibacterial processing has been applied to the dust filter, or a combination of the dust filter and the antibacterial filter has been put to practical use. However, conventional inorganic antibacterial agents lose their function and effect when their surface is covered with bacteria and dirt. In addition, organic antibacterial agents and antifungal agents, etc., are themselves airborne. There were problems that could lead to contamination.

Further, in recent home air purifiers and the like,
There is a high demand for deodorization performance in addition to dust collection performance, and many models have added deodorization performance. However, in a household air purifier that is required to have a compact size so as not to stress the living environment, it is not preferable to dispose the dust collecting section and the deodorizing section independently. In recent years, a system that decomposes malodorous substances by the photocatalytic effect of a photoreactive semiconductor has been attracting attention. However, this also causes filter dust to adhere to atmospheric dust on the photocatalyst surface over a long period of use, which significantly reduces the deodorizing effect. There is a problem that the service life cannot be extended.

However, when actually used in each home, the odorous substances to be deodorized are generally determined depending on the environment in which they are used, and are often different from each other. Further, since the deodorizing filter mounted on a commercially available air purifier is designed to deodorize a plurality of typical malodorous components in a well-balanced manner, the deodorizing capacity for each odor cannot be said to be high. Depending on the usage environment, with a certain gas,
It is conceivable that the capacity reaches the deodorization limit capacity early. Filters saturated with a specific gas also have a problem that it is difficult to deodorize other gases, and it is impossible to purify the air in all use environments with one commercially available air purifier Is gradually being recognized.

[0006]

SUMMARY OF THE INVENTION The object of the present invention is to solve the above-mentioned problems by providing a deodorizing filter as an external filter at least at the outlet of an air purifier having a dust-removing ability, thereby improving air cleaning. An object of the present invention is to provide a filter capable of improving efficiency and extending the life of deodorizing performance.

[0007]

Means for Solving the Problems The present inventors have made intensive studies to solve the above-mentioned problems, and as a result, have reached the present invention.

(1) An external deodorizing filter for an air purifier having a fixing means for mounting an air purifying filter for deodorizing a malodorous gas at least at a jet portion of an air purifier having a dust removing function.

(2) The external deodorizing filter for an air purifier according to claim 1, wherein the external deodorizing filter for the air purifying device has a corrugated honeycomb structure in order to maintain a low pressure loss. filter.

(3) The external deodorizing filter for an air purifier according to claim 1, wherein the external deodorizing filter for the air purifier has a pleated structure to maintain a low pressure loss. .

(4) The external deodorizing filter for an air purifier according to claim 1, wherein at least one of an acidic gas, a basic gas, and another polar gas is to be deodorized. External specific gas deodorizing filter for purifier.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Components relating to an external deodorizing filter for an air purifier according to the present invention will be described. First of all,
The configuration of the external deodorizing filter for an air purifier according to the first invention of the present invention will be described in detail.

Examples of the substrate according to the present invention include woven fabrics, nonwoven fabrics, nets, sponges and the like, as well as general-purpose thermoplastic films such as polyethylene films, polypropylene films, and polyester films and thin plates. Of these, a sheet having poor air permeability, such as a film or a thin plate, or a fine hole may be formed to improve air permeability. Among them, in particular, when a nonwoven fabric or the like is used, relatively uniform air permeability can be ensured, and the encapsulation process is also easy, so that it is advantageously used.

Nonwoven fabrics include polyamide fibers, polyester fibers, polyalkylene paraoxybenzoate fibers, polyurethane fibers, polyvinyl alcohol fibers, polyvinylidene chloride fibers, polyvinyl chloride fibers, polyacrylonitrile fibers, and polyolefin fibers. , Synthetic fibers such as phenolic fibers, inorganic fibers such as glass fibers, metal fibers, alumina fibers, activated carbon fibers,
It is produced by various methods using natural fibers such as wood pulp, hemp pulp, and cotton linter pulp, regenerated fibers, or fibers obtained by imparting functions such as hydrophilicity and flame retardancy to these fibers.

The method for producing the nonwoven fabric is not particularly limited, and the web obtained by a dry method, a wet papermaking method, a melt blow method, a spun bond method, etc. may be subjected to a hydroentangling method, a needle punching method, a stitching method, depending on the purpose and application. Physical method such as bonding method, thermal bonding method such as thermal bonding method,
It can be manufactured by appropriately combining methods of developing strength by an adhesion method using an adhesive such as a resin bond.

When a deodorant is internally added to a substrate such as a non-woven fabric, for example, an external deodorant for an air purifier according to the present invention is produced by adding a deodorant together with the material of the substrate during the production of the substrate. A filter agent used for a filter can be manufactured. At this time, a cationic polymer flocculant such as a cationic polyacrylamide and polyaluminum chloride, and an anionic polymer flocculant such as an anionic polyacrylamide that forms a complex with the flocculant and enhances the flocculation. It is preferable to use an agent, anionic inorganic fine particles such as colloidal silica and bentonite to form an aggregate of the photoreactive semiconductor. Alternatively, it is also possible to further improve the mechanical strength of the aggregate by adding fine fibers to the aggregate.

On the other hand, when a deodorant is applied to a substrate such as a nonwoven fabric, an aqueous emulsion of a thermoplastic resin, a film-forming inorganic substance, a metal oxide, etc. are used as a binder for fixing the deodorant to the substrate. Composite thermoplastic polymer emulsions, etc., alone or in combination as necessary, mixed with a deodorant, various blade coaters, roll coaters, air knife coaters, bar coaters, rod blade coaters, short dwell coaters, die coaters , A comma coater, a reverse roll coater, a kiss coater, a dip coater, a curtain coater, an extrusion coater, a microgravure coater, and a size press. An external deodorizing filter can be manufactured.

Here, the aqueous emulsion of a thermoplastic resin is a thermoplastic polymer dispersed in water, and the polymer component is an acrylic resin, a styrene-acryl copolymer, a styrene-butadiene copolymer. , Ethylene-vinyl acetate copolymer, vinyl chloride-vinyl acetate copolymer, ethylene-vinyl acetate-vinyl chloride copolymer,
Examples thereof include polypropylene, polyester, phenoxy resin, phenol resin, and butyral resin.

Here, the metal oxide composite thermoplastic polymer emulsion has a shape in which the surface of the thermoplastic polymer emulsion is covered with a metal oxide, and the polymer component and the metal oxide remain even after the film is formed. It has the property that the components separate to maintain the sea-island structure.

Examples of the metal oxide include colloidal silica and colloidal alumina. Metal oxide composite thermoplastic polymer emulsions such as colloidal silica composite thermoplastic polymer emulsions are disclosed in
As disclosed in JP-A-71316 and JP-A-60-127371, copolymerizable monomers, monomers having a polymerizable unsaturated double bond and an alkoxysilane group in the molecule, and vinylsilane Mix with colloidal silica,
In the process of producing a polymer component by emulsion polymerization, it is obtained by a method in which a silica component is fixed on the emulsion surface. As the method, for example, Internet
nal Symposiumon Polymeric
Microspheres Prints, 199
1,181, a method of precipitating and fixing a silica component on the surface of a previously formed emulsion using a water-insoluble hydrolyzable alkoxysilane such as ethyl orthosilicate. Can be

In addition to the above-described support and fixing of the deodorant to the base material by internal addition or coating, the flexibility required for the external deodorizing filter for an air purifier of the present invention is not impaired. In a suitable substrate, a wet method such as a plating method or a sol-gel method, a vacuum deposition method such as a resistance heating type vacuum deposition method, an electron beam heating type vacuum deposition method, an ion plating method and a sputtering method, and an anodizing method. The deodorant may be supported and fixed using a conventionally known method such as the above method. Moreover,
In order to further improve the deodorizing performance, a treatment to impregnate a special agent may be performed, so that a deodorizing agent specialized for a basic gas, an acidic gas, and a neutral gas may be used.

Examples of the adsorbent include those having a physical adsorption effect, such as activated carbon, activated clay, zeolite, sepiolite, silica gel, ceramics, activated alumina, and composite phyllosilicate. Iron-based compounds such as iron oxide, organic acids, etc.
Examples of those having a physicochemical adsorption action include impregnated activated carbon and natural inorganic substances. These conventional general-purpose adsorbents can be used alone or in combination.

The external deodorizing filter for an air purifier according to the present invention is characterized in that a fixing means is provided so that the filter can be easily attached to the outlet. As an attaching means, any method such as a double-sided adhesive tape, a magic tape, and a (registered trademark) suction cup may be used as long as it can withstand the pressure loss caused by the air volume of the air cleaner.

The external deodorizing filter for an air purifier according to the present invention is separately mounted, for example, in addition to a dust filter and a deodorizing filter previously mounted on the air purifier, and is mounted on a discharge port of the air purifier. As a result, dust such as tobacco can be removed, and only the malodorous chemical components can be removed by the filter. In general, a deodorizing filter is susceptible to dust, and it is expected that a long service life can be significantly prolonged by installing the deodorizing filter at an outlet instead of an air intake.

Next, the air purifier external filter according to the second aspect of the present invention will be described in detail.

The honeycomb according to the present invention is a structure composed of cell walls having openings, is excellent in air permeability, and can increase the surface area per unit volume. This is a preferred structure for a filter.
As a specific example of such a honeycomb, JIS-Z-15
16, a corrugated honeycomb formed by laminating single-faced cardboards manufactured in accordance with the “exterior cardboard”, a hexagonal honeycomb formed of hexagonal cells, a honeycomb formed of square cells, a honeycomb formed of triangular cells, and a hollow cylindrical shape A honeycomb formed by assembling cells is exemplified. Here, the cell shape such as a hexagon or a square is not a formal polygon but may be an irregular shape having rounded corners or curved sides.

The corrugation of the corrugated honeycomb according to the present invention is generally a sine wave or a pseudo sine wave, but is not particularly limited, and may be a sea wave, a triangular wave, a square wave, or the like.
A waveform such as a semicircular or fan-shaped wave connected to an arc may be used. Further, as long as the spirit of the present invention is not deviated, the step height of the middle shin may not be constant, and at least a part of the top of the middle shin may not be in contact with the liner.

The honeycomb according to the present invention is disclosed in
As disclosed in Japanese Patent No. 244708, a corrugated block is produced by laminating and bonding single-sided cardboard,
A corrugated honeycomb having a liner surface at an oblique angle with respect to an opening surface of a cell manufactured by cutting the corrugated block obliquely at a fixed angle with respect to the liner surface may be used. The oblique angle is not particularly limited,
30 to 60 degrees is preferred.

Next, the air purifier external filter according to the third aspect of the present invention will be described in detail.

The pleating process according to the present invention is a valley-like folding process, and can increase the area of the filter base material with respect to a fixed ventilation area. The shape of the pleats is not particularly limited, and may be appropriately set according to the area and thickness of the base material to be used. The height (H) of the peak and the pitch (P ) And H / P = 2 to 20
It is preferable to satisfy the following relationship. If the H / P is smaller than 2, the increase in the substrate area is small, while if the H / P is larger than 20, the surfaces of the adjacent base materials may be too close to each other to impair the air permeability.

Next, the external specific gas deodorizing filter for an air purifier according to the fourth aspect of the present invention will be described in detail.

The basic gas according to the present invention contains malodorous substances composed of basic compounds such as ammonia and amines.

Here, the amines include methylamine,
Examples thereof include alkylamines such as dimethylamine, trimethylamine and dimethylamine, and arylamines such as aniline.

The acidic gas according to the present invention contains hydrogen sulfide and malodorous substances consisting of mercaptans, sulfides and disulfides.

Here, examples of the mercaptans include alkyl mercaptans such as methyl mercaptan, ethyl mercaptan and propyl mercaptan, and aryl mercaptans such as phenyl mercaptan.

Here, examples of the sulfides include alkyl sulfides such as dimethyl sulfide, ethyl sulfide and propyl sulfide, and aryl sulfides such as phenyl sulfide. Examples of the disulfides include alkyl disulfides such as dimethyl disulfide, ethyl disulfide, and propyl disulfide.

The external specific gas deodorizing filter for an air purifier of the present invention is characterized by deodorizing at least one of a basic gas, an acidic gas, and another polar gas. 2 within the range not deviating from
A kind or three kinds of deodorizing filter materials may be compounded.

[0038]

EXAMPLES The present invention will be described in more detail with reference to the following Examples, but it should not be construed that the present invention is limited thereto without departing from the scope of the invention.

Preliminary operation 1 Polyester fiber (fineness 3d, fiber length 38mm) 50% by weight, polyester fiber (fineness 6d, fiber length 51mm)
30% by weight and viscose rayon fiber (3d, 51m
m) is mixed with 20% by weight to form a web by a dry method, and then impregnated in acrylic latex as a thermoplastic binder and dried to obtain a base material A of a highly permeable dry nonwoven fabric. Produced.

Preliminary operation 2 Core-sheath type heat-fusible polyester fiber (fineness 2d, fiber length 5
mm) 50% by weight, polyester fiber (fineness 0.5d,
45 wt% of fiber length 5 mm) and 5 wt% of softwood bleached kraft pulp (Canada standard freeness 480 ml) were added and mixed in water, and the basis weight was 100 g / m ² using a round paper machine.
The base material B of the wet type nonwoven fabric was prepared.

Preparation Example 1 Coating solution containing 80% by weight of an acidic gas deodorizer and 20% by weight (in terms of active ingredient) of a vinyl acetate-ethylene-acrylic emulsion (Sumikaflex-900, manufactured by Sumitomo Chemical Co., Ltd.) The specific liquid deodorizing filter A was prepared by impregnating and applying the coating solution at a dry coating weight of 30 g / m ² to the base material A in the preliminary operation 1.

Preparation Example 2 80% by weight of an acidic gas deodorizer and 20% by weight (in terms of active ingredient) of a vinyl acetate-ethylene-acrylic emulsion (Sumikaflex-900, manufactured by Sumitomo Chemical Co., Ltd.) were added to form a coating solution. The specific liquid deodorizing filter B was prepared by impregnating and applying the coating solution to the base material B of the preliminary operation 1 at a dry coating weight of 30 g / m ² .

Preparation Example 3 80% by weight of basic gas deodorant, vinyl acetate-ethylene
An acrylic emulsion (Sumikaflex-900, manufactured by Sumitomo Chemical Co., Ltd.) was added at a ratio of 20% by weight (in terms of active ingredient) to prepare a coating solution, and the coating solution was prepared at a dry coating weight of 30 g / m ^2. The specific gas deodorizing filter C was produced by impregnating and coating the base material B in the operation 1.

Example 1 The specific gas deodorizing filter A of Production Example 1 was cut out to the size of the outlet of the air purifier, and a double-sided tape for attachment was attached to the edge portion, and the air purifier of Example 1 was externally attached. A deodorizing filter was used.

Example 2 The specific gas deodorizing filter B of Production Example 2 was corrugated, cut out to the size of the outlet of the air purifier, and a double-sided tape for attachment was attached to the edge, and the air purification of Example 2 was performed. An external deodorizing filter was used.

Example 3 A specific gas deodorizing filter B of Preparation Example 2 and a specific gas deodorizing filter C of Preparation Example 3 were used, each having a size of one half the size of the outlet of the air purifier, to form a composite corrugate. A double-sided tape for attachment was attached to the edge portion to obtain an external air purifier deodorizing filter of Example 3.

Example 4 A specific gas deodorizing filter B of Production Example 2 was used in the middle of a corrugate, and a specific gas deodorizing filter C of Production Example 3 was used for the liner portion of the corrugate to form a composite corrugate. Then, a double-sided tape for attachment was attached to the edge portion to obtain an external air purifier deodorizing filter of Example 4.

Example 5 The specific gas deodorizing filter A of Production Example 1 was processed into a pleated shape, cut into the size of an air purifier, subjected to frame processing at the edge portion, and attached to the frame portion with a double-sided tape. 5 was an external deodorizing filter for an air purifier.

Comparative Examples The cases where the external deodorizing filters for air purifiers of Examples 1 to 5 were mounted on the air intake side were used as Comparative Examples 1 to 5, respectively, and the following tests were performed to evaluate the characteristics.

[Deodorizing Performance Test] The external deodorizing filter for the air purifier of the example was attached to the outlet of a commercially available air purifier (manufactured by Daikin Industries: Hikari Crier ACEF3DS) to make contact with gas. Attach a shielding material to avoid it and install it inside a 1 m3 stainless steel chamber. As a malodorous gas component, ammonia, which is a basic gas component, is adjusted by injecting it with a 100 ppm gas syringe. After confirming that the concentration in the system was steady, the shielding material was removed, and the air purifier was operated at an air flow rate of 3 m3 / min, and the concentration inside the container after 30 minutes was measured. Similarly, a test was conducted for hydrogen sulfide, which is an acidic gas component. In addition, the same filter was attached to the air intake of the air purifier, and the test of the comparative example was performed. The results are shown in Table 1.

[Filter Life Test] A cigarette durability test was performed with the filters of Examples and Comparative Examples mounted in a closed 1 m3 stainless steel airtight container. In the experiment, three cigarettes (mild seven) were stirred in a container 8
After suction combustion for a minute, the air purifier is operated. 30
After a minute, the concentrations of ammonia and hydrogen sulfide inside the container are measured with a gas detector tube. At the end of a series of tests, open the container and run for 30 minutes under clean air. The container was closed again, and the same test was repeated. The results of calculating the second and third removal rates when the test was performed three times in succession and the initial removal rate was set to 100 are shown in Table 2.

[0052]

[Table 1]

[0053]

[Table 2]

According to the results shown in Table 1, the deodorizing efficiency was improved by installing the deodorizing filter at the outlet of the air purifier as compared with the filter of the comparative example, which had to be deodorized before dust was removed. Got high. This is considered to be due to the difference in the results as shown in the table because the efficiency of contact with the adsorbent decreases when the surface of the deodorizing filter is covered with dust or the like. From this result, it can be seen that it is very reasonable to attach the filter to the ejection part of the air purifier having the dust removing performance.

This is remarkable when durability performance is evaluated as shown in Table 2. Compared to the initial deodorizing performance, the filter of the comparative example drops the deodorizing efficiency to a level of half or less of the first time. On the other hand, surprisingly, it was found that the filter of the example can obtain a deodorizing efficiency of 50% or more even when the test is repeated three times.

[0056]

According to the present invention, in an external deodorizing filter for an air purifier to be attached to an air outlet of an air purifier having at least a dust removing function, a filter having high deodorizing efficiency and long lasting deodorizing performance can be provided. . Further, since the filter is not a built-in type filter but is attached externally, maintenance such as replacement of the filter is easy, and since there is no need for a fixture for assembling, it is economically advantageous.

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) A61L 9/01 A61L 9/01 HL

Claims (4)

[Claims] 1. An external deodorizing filter for an air purifier, comprising a fixing means for mounting an air purifying filter for deodorizing malodorous gas at least at a jetting portion of an air purifier having a dust removing function. 2. The external deodorizing filter for an air purifier according to claim 1, wherein the external deodorizing filter for an air purifier has a corrugated honeycomb structure in order to maintain a low pressure loss. . 3. An external deodorizing filter for an air purifier according to claim 1, wherein the external deodorizing filter for an air purifier has a pleated structure in order to keep pressure loss low. 4. The external deodorizing filter for an air purifier according to claim 1, wherein at least one of an acidic gas, a basic gas, and another polar gas is subjected to deodorization. External gas deodorizing filter for machine.