JPH04300616A - Deodorizing filter for air conditioner - Google Patents

Abstract

PURPOSE:To subject a deodorizing filter for air conditioner to flameproofing treatment. CONSTITUTION:A deodorizing filter which comprises a latticed filter substrate 12, and gas absorbent particles 14 attached to the filter substrate with a tacky adhesive, a flame retardant being added to the tacky adhesive and containing a halogen flame resisting agent and an inorg. flame resisting agent.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deodorizing filter for air conditioners, and more specifically to a filter of this type that has low pressure loss and anti-mold performance.

0002

[Prior Art] Conventional air conditioners are generally equipped with only a coarse dust removal filter, and the pressure loss of the filter is 0.1 - 0.2 mmAq (measured at an air flow rate of 1 m/sec). (the same applies hereafter). In response to this, in recent years there has been a strong desire to remove submicron particles such as cigarette smoke and pollen.
High-density filters with a pressure loss of about 2-3 mmAq have come to be used as an option. However, the use of the above-mentioned high-density filter causes a large pressure loss, which causes problems such as a decrease in air volume or an increase in noise. To deal with this problem, low pressure loss dust removal mechanisms such as electrostatic precipitators and filters using electret fibers (semi-permanently polarized polyolefin fibers, disclosed in Japanese Patent Publication No. 56-47299, etc.) have been developed. came to be used.

[0003] However, since the above-mentioned low pressure loss dust removal mechanism is not originally intended for deodorization, its deodorization ability is low.

On the other hand, various types of filters to which activated carbon is bonded have been proposed. For example, 1
) Japanese Patent Publication No. 59-19727, Japanese Patent Publication No. 53-64675,
Japanese Utility Model Application Publication No. 57-119724 discloses a filter in which finely powdered activated carbon is mixed with paper at the paper-making stage and formed into a honeycomb or single-layer corrugated cardboard shape. 2) Japanese Patent Application Publication No. 1983-
175560, JP-A-63-88014, JP-A-62
-79522 and the like discloses a filter in which fibrous activated carbon is formed into a honeycomb shape. 3) Japanese Patent Publication No. 57-4832
5, JP-A-59-142843, JP-A-59-227
No. 704, etc., discloses a filter in which a mixture of powdered activated carbon and a binder is extruded into a lattice shape or a honeycomb shape, which is activated by firing.

[0005]

[Problem to be solved by the invention] The above filter 1 is
The amount of activated carbon used cannot be increased, and the amount of activated carbon that effectively contributes to deodorization on the paper surface is small, so the deodorizing effect is low. The above-mentioned filter 2 has the disadvantage that the fibrous activated carbon is expensive and cannot be used in large quantities, and although the fibrous activated carbon has a high adsorption rate, it also desorbs quickly, and odor immediately leaks from the filter. The above filter 3 has a high deodorizing effect, but the filter itself is expensive, and distortion occurs during molding, so it cannot be used over a large area. Therefore, it is not possible to find a deodorizing filter suitable for use in air conditioners.

The present invention has been made based on this viewpoint, and can be used in combination with the above-mentioned dust removal mechanism or alone, and has a low pressure loss (1.0 mmAq or less, preferably 0.5 mmAq or less). To provide a deodorizing filter for an air conditioner that can deodorize indoor odors such as odors.

[0007] In addition, conventional adhesives for adhering activated carbon to substrates only contain preservatives for the purpose of preventing deterioration of the adhesive itself. Therefore, when this is used as a deodorizing filter for air conditioners, it can be used during the rainy season, etc.
If the air conditioner is not used for a long time during the high humidity season, there is a risk of mold forming on the filter. If mold grows on the filter, it may cause an unpleasant odor or scattering of spores the next time it is used. Furthermore, it is not desirable from the appearance point of view that mold is noticeably observed on the filter when the filter is replaced.

Furthermore, flammable polymers such as acrylic are used as the adhesive. However, in order to ensure greater safety in home appliances, it has become necessary to make the parts used in them as flame-retardant as possible, and regulations are becoming stricter year by year.

[0009] Accordingly, another object of the present invention is to prevent mold generation and improve flame retardancy in this type of filter.

0010

[Means for solving the problem] In order to achieve the above purpose,
The present invention provides a deodorizing filter for air conditioners comprising a lattice-shaped filter base and gas adsorbent particles adhered to the filter base with an adhesive, wherein a flame retardant is added to the adhesive. It is characterized by the presence of

In a desirable embodiment, the flame retardant includes a halogen flame retardant and an inorganic flame retardant. Furthermore, an antifungal agent is added to the above adhesive.

0012

[Function] According to the deodorizing filter according to the present invention having the above structure, it is possible to achieve a pressure loss of 1.0 mmAq or less under the above air flow rate conditions. Further, the deodorizing effect of the present deodorizing filter meets the general conditions for a deodorizing filter, and the continuity of the deodorizing effect meets the conditions for a filter used in an air conditioner. Moreover, prevention of mold generation and improvement of flame retardancy of the filter can be achieved.

[0013]

Embodiment [Structure and Materials] FIG. 1 is a plan view showing an embodiment of a deodorizing filter 10 according to the present invention. This filter includes a grid-like filter base 12 and a filter base 12.
and gas adsorbent particles 14 adhered to the gas adsorbent particles 14.

The deodorizing filter 10 according to the present invention has an aperture ratio (
(in a plane parallel to the plane of the paper of FIG. 1) is about 50% to about 80%, and this value is obtained as a result of complying with various conditions described below. The thickness of the filter 10 (in the direction perpendicular to the plane of the paper in FIG. 1) is 15 mm or less, preferably about 3 mm.
That's all. The present filter 10 differs from conventional filters in that the size of the gas adsorbent particles 14 is relatively large and the thickness of the filter 10 is small, as shown in FIG. These characteristics are the key to satisfying the requirements of low pressure loss, appropriate deodorizing ability, and long life as a deodorizing filter for air conditioners.

The base 12 is made of a thin material such as paper, aluminum, or plastic. When using paper as a material,
The strength can also be reinforced by impregnating it with phenol resin or the like. Further, the base body 12 can also be subjected to a non-combustible treatment. The thickness of the base 12 is substantially the same as that of the present filter 10, and is therefore approximately 15 mm or less, preferably 3 mm or more. This thickness is determined because the present filter 10 will eventually be housed in the casing of the air conditioner as shown in FIG.

In the illustrated embodiment, the pattern shape of the lattice on the base body 12 is a hexagonal so-called honeycomb shape, but the pattern shape can be any shape such as a rectangle or a triangle. However, one cell 1 of the grid
6 (in a plane parallel to the plane of the paper in Figure 1)
is approximately 0.20 to approximately 0.35 cm2. This value essentially means the density of the partition wall 18 for supporting the gas adsorbent particles 14. The reason for selecting this value will be described later.

The gas adsorbent particles 14 are made of activated carbon,
It is also possible to use other types such as impregnated activated carbon. Further, in order to deal with indoor CO generation sources such as oil stoves, a catalyst capable of catalytically oxidizing CO can be used in combination with a deodorizer. As this catalyst, a gold/oxide catalyst (disclosed in JP-A No. 60-238148, etc.) which does not become inactive even in the presence of moisture is desirable.

The size of the gas adsorbent particles 14 is from about 20 to about 6
0 mesh, the amount of gas adsorbent particles 14 used per plane unit area of the base 12 is about 400 to about 2000 g/m2
It is. The reason for selecting this value will be described later.

As the binder for adhering the gas adsorbent particles 14 to the substrate 12, an adhesive is preferably used to prevent the particles from falling off. The binder is applied to the blank substrate during filter manufacture and then dried to increase its viscosity. The drying process removes the odor of the solvent, and the activated carbon no longer adsorbs the odor of the solvent.

Preferably, the present filter 10 is used while being covered with a breathable cover (not shown) made of nonwoven fabric, paper, or the like whose mesh is finer than that of the gas adsorbent particles 14. This breathable cover is also desirably treated to be nonflammable, mildewproof, and antibacterial. [Usage Mode] FIG. 2 is a side view showing the present filter 10 installed in a casing 32 of an indoor unit 30 of an air conditioner. Arrows in the figure indicate the direction of air flow. The present filter 10 is disposed in the air introduction passage following the normally used dust removal filter 34. The deodorized air that has passed through the filter 10 is heated or cooled by a heat exchanger 36, and then supplied into the room by the blower 40. The present filter 10 can also be disposed in the air discharge passage after the heat exchanger 36 instead of in the air introduction passage. Note that the reference numeral 38 in the figure is a dew pan. [Manufacturing Method] FIG. 3 is a diagram showing an example of the manufacturing process of the present filter 10. First, a blank substrate of a predetermined thickness is supplied from the substrate supplying machine 52, and in the binder dipping section 54,
Adhesive is applied all over. Next, the blank substrate is placed in a dryer 56 for about 10 minutes to impart a predetermined viscosity to the binder and to remove the odor of the binder's solvent. After drying, the blank substrate is sent to the adsorbent application section 62.

On the other hand, an adsorbent of a predetermined size is supplied to the adsorbent adhering section 62 from an adsorbent supplying device 58, and is adhered to the surface of the blank substrate via a binder. Next, excess adsorbent that is incompletely attached to the substrate or adsorbent is removed by a scraping section 64. After the adsorbent has sufficiently adhered to the substrate, the substrate of the primary product is cut into desired dimensions by the cutting machine 66, and the final product filter 10 is completed. Thereafter, if necessary, the filter 10 is
A breathable cover may be laminated on both sides or one side. [Method for testing the deodorizing function of this deodorizing filter] The pressure loss of the deodorizing filter was measured using a filter with inner dimensions of 10 x 10 cm and length of 220 cm.
A rectangular transparent acrylic wind cylinder measuring 1.5 cm was used, and a deodorizing filter was attached to the center of the cylinder. The air velocity passing through the filter was 1.0 m/sec, and the static pressure difference before and after the filter was measured.

The sensory test for confirming the deodorizing effect is as follows. First, two commercially available cigarettes were spontaneously combusted in a stainless steel chamber with a volume of 17 m3. After 15 minutes, the electric fan in the chamber was activated to make the interior uniform, and then the present deodorizing filter was attached to the filter attachment part of a commercially available air cleaner and the chamber was operated. Filter opening is 0.065 m2, processing air volume is 3
．． 9 m3/min. Air purifier operation start 3
After 0 minutes, the air in the chamber was collected in an odorless 10 liter plastic bag and subjected to a sensory test. The sensory test was conducted by 15 people, excluding those with anosmia in advance.

The effect of reducing CO concentration is as follows. First, inside the same chamber as the above sensory test, C
The O concentration was adjusted to 100 ppm. Next, this deodorizing filter was used under the same air purifier and conditions as in the above sensory test, and the attenuation of the CO concentration was measured. The measuring instrument used is CM2510 manufactured by Gastec. [Study of conditions for the present deodorizing filter] Conditions such as the cell size of the lattice of the substrate 12, the dimensions of the gas adsorbent particles 14, and the amount used thereof were studied as follows. a. Cell size of the lattice FIG. 5 is a graph showing the relationship between the amount of supported activated carbon and the pressure loss based on the change in the cell size of the lattice. The filter used in the experiment was manufactured by the process according to the present invention shown in FIG. The base body 12 has a honeycomb-like lattice structure as shown in FIG. 4, and has a thickness of 5 mm. The term grid cell size refers here to "l" in FIG. Activated carbon was also used as a gas adsorbent.

In the graph of FIG. 5, curve a shows the results for a filter with an activated carbon particle size of 32-60 mesh, and curve b shows the results for a filter with an activated carbon particle size of 20-42 mesh. In addition, the straight line D is the primary limit of pressure loss (0.5 mmAq
) line, straight line L is the secondary limit line of pressure loss (1.0 mmA
q) is shown.

In the graph of FIG. 5, each plot symbol indicates the following.

"×"...Cell size 3/8 inch (cell planar area approximately 0.8 inch)
cm2) "△"...Cell size 1/4 in (cell plane area approximately 0.35cm2) "○"...Cell size 3/16
in (Cell flat area approximately 0.2 cm2) "□"...Cell size 1/8 in (Cell flat area approximately 0.09 cm2)
As can be seen from the figure, cell size 1 indicated by “□”
/8 inch substrate, the pressure loss even exceeds the secondary limit line L. On the other hand, cell size 3/8 indicated by “×”
In the case of an in-type substrate, a sufficient amount of activated carbon cannot be supported. Therefore, the cell size of the substrate grid is about 1/4 - about 3/16
A range of in is appropriate. As mentioned above, the shape of the lattice does not need to be limited to a honeycomb shape, so if the above size is expressed in terms of cell planar area, this range is about 0.2 to about 0.35 cm2.
becomes. b. Particle Size and Usage Amount of Gas Adsorbent FIG. 6 is a graph showing the relationship between the amount of supported activated carbon and pressure loss based on changes in the particle size of activated carbon. The filter used in the experiment was manufactured by the process according to the present invention shown in FIG. The entire base body 12 has a honeycomb-like lattice structure as shown in FIG.

In the graph of FIG. 6, curve c indicates cell size 3/
16 inches (cell plane area approximately 0.2 cm2) and thickness 5 m
m substrate filter, curve d is cell size 1/4 in
(Cell plane area is about 0.35 cm2) and 5 mm thick substrate. Curve e is a filter with cell size 3/16 inch (cell plane area about 0.2 cm2) and 10 mm thick substrate. Curve f is cell size. The results are shown for a filter with a substrate of 1/4 inch (cell plane area approximately 0.35 cm2) and 10 mm thick. Further, the straight line D shows the first pressure loss limit line (0.5 mmAq), and the straight line L shows the second pressure loss limit line (1.0 mmAq).

In the graph of FIG. 6, each plot symbol indicates the following.

"×"...Particle size 60-100 mesh "△"...Particle size 32-60 mesh "○
”…Particle size 20-42 mesh “□”…Particle size 6-10 mesh As can be seen from the same figure, in activated carbon of 6-10 mesh indicated by “□”, the pressure loss is far beyond the secondary limit line L. It exceeds. On the other hand, “
Activated carbon of 60 to 100 mesh indicated by "x" does not support a sufficient amount of activated carbon. Therefore, the particle size of the activated carbon is suitably in the range of about 20-60 mesh.

Further, FIG. 6 shows the amount of activated carbon supported (ie, the amount used) per unit area of the substrate plane under various conditions in a state where activated carbon is adhered to the entire surface of the substrate. When considering this usage range up to a filter thickness of 15 mm,
The amount of activated carbon used within the particle size range is approximately 200.
It is considered to be less than 0g/m2. In addition, the amount used is at least about 400 g/m2 when taking into account the deodorizing effect.
It becomes necessary. This value corresponds to the usage on a substrate of approximately 3 mm thickness.

Furthermore, from FIG. 6, it can be seen that within the particle size range of the activated carbon according to the present invention described above, the pressure loss is not significantly affected by changes in the thickness of the substrate.

The functional evaluation of the deodorizing filter based on the relationship between the dimensions of the activated carbon and the cell size is as shown in FIG. The shaded area in the figure is the condition range of the filter according to the present invention. [Example and deodorizing function test results] Case where no air purifier was installed and filters A, B, C, within the condition range of the present invention,
Regarding the case of using an air purifier with D and E installed,
The results of the sensory test to compare the deodorizing effect are shown in the second
Shown in the table. The numerical values in the same table are based on the 6-stage odor intensity method (see Table 1). From the comparison results below, a significant difference was recognized at a risk rate of 1%, proving the effectiveness of filters A-E according to the present invention in deodorizing.

[0033] Regarding Filter E, the above-mentioned CO concentration reduction test was also conducted. As a result, as shown in FIG. 8, the effectiveness of Filter E in reducing CO concentration was proven. In FIG. 8, curve h shows the result when filter E was installed, and curve i shows the result when filter was not installed.

The manufacturing conditions of the filter used are as follows. a. Filters A and B cell size 3/16 inch (cell planar area approximately 0.2 cm2
), after manually spreading a paper honeycomb core with a thickness of 5 mm, using a commercially available emulsion adhesive (SK Dyne E-
3008B) and coated with adhesive. It was placed in a dryer and dried at 100° C. for 2 hours, and the weight was measured, and the amount of adhesive applied was 1300 g/m 2 . Two types of particle sizes (20-42 mesh and 32-60 mesh) of commercially available activated carbon (GG manufactured by Kuraray Chemical Co., Ltd.) were attached to this. Filter A was impregnated with activated carbon having a particle size of 20-42 mesh, and Filter B was impregnated with activated carbon having a particle size of 32-60 mesh. The amount of activated carbon used in filters A and B is 790 and 600, respectively.
g/m2, pressure loss is 0.43 and 0.23 mmA, respectively.
It was q. b. Filter C, D Cell size 1/4 inch (Cell plane area approximately 0.35 cm2
), a stretched aluminum honeycomb core with a thickness of 10 mm was placed in a bath of a commercially available solvent-based adhesive (SK Dyne E-1200 manufactured by Soken Chemical Co., Ltd.), and the adhesive was applied. It was placed in a dryer and dried at 120° C. for 3 hours, and the weight was measured, and the amount of adhesive applied was 500 g/m 2 . Commercially available activated carbon (GG manufactured by Kuraray Chemical)
Two types of particle sizes (20-42 mesh and 32-60 mesh) were attached. Filter C is impregnated with activated carbon of particle size 20-42 mesh, particle size 32-60.
Filter D was prepared by impregnating a mesh of activated carbon. The amount of activated carbon used in filters C and D is 1300 and 100, respectively.
0g/m2, pressure loss is 0.32 and 0.13mm respectively
It was Aq. c. Filter E Cell size 3/16 inch (Cell plane area approximately 0.2 cm2
), a stretched aluminum honeycomb core with a thickness of 10 mm was placed in a bath of a commercially available solvent-based adhesive (SK Dyne E-1200 manufactured by Soken Chemical Co., Ltd.), and the adhesive was applied. It was placed in a dryer and dried at 100° C. for 2 hours, and the weight was measured, and the amount of adhesive applied was 600 g/m 2 . Commercially available activated carbon (GG manufactured by Kuraray Chemical) and gold/oxide catalyst (manufactured by Toyo CCI) each having a particle size of 20-42 mesh were impregnated thereon at a volume ratio of 8:2. The amount of activated carbon used is approximately 1200g/m2, and the pressure loss is 0.
．． It was 59 mmAq.

[0035]

[Table 1]

[0036]

[Table 2] As shown in Table 2, a clear decrease in odor intensity was observed in Filters A to E. [Mold Resistance] Filters F to I were formed under the same conditions as Filter A except for the following changes, and the mold resistance of the filters was examined. a. Filter F Add a commercially available solvent-soluble fungicide (Hokuko Sangyo E50) to the adhesive.
A, main component thiabendazole, solvent DMSO) at a weight ratio of the main component to the adhesive of about 0.4%, and a commercially available water-soluble fungicide (L100N manufactured by Hokuko Sangyo, main component unknown)
was added in an amount of about 0.2% by weight of the main component to the adhesive. b. Filter G Add a commercially available water-dispersible fungicide (Tomicide Z-50, manufactured by Yoshitomi Pharmaceutical Co., Ltd., main component: tinkupyrithione) to the adhesive at a weight ratio of approximately 0.15% of the main component to the adhesive, and add a commercially available water-dispersible fungicide to the adhesive. A mold-proofing agent (L100N manufactured by Hokuko Sangyo, main component unknown) was added in an amount of about 0.2% by weight of the main component to the adhesive. c. Filter H A commercially available water-dispersible antifungal agent (Tomicide Z-50 manufactured by Yoshitomi Pharmaceutical Co., Ltd., main component: tinkupyrithione) was added to the adhesive in an amount of about 0.15% by weight of the main component to the adhesive. d. Filter I Add a commercially available water-soluble fungicide (L100 manufactured by Hokuko Sangyo Co., Ltd.) to the adhesive.
N, main component unknown) was added in an amount of about 0.2% by weight of the main component to the adhesive. [Comparative test of deodorizing performance of filters F and G] Filter F,
Regarding G, "Method for testing the deodorizing function of this deodorizing filter"
A comparative test of deodorizing performance was conducted according to the method described in section. The test results are shown in Table 3 together with the test results for the case without the air cleaner described above and for Filter A.

[0037]

[Table 3] As shown in Table 3, a decrease in the deodorizing function was observed in Filter F using a solvent-soluble fungicide, and this is thought to be due to the activated carbon absorbing the odor of the organic solvent during the manufacturing process. It will be done. On the other hand, in Filter G using a water-dispersed antifungal agent, excellent deodorizing performance almost equivalent to that of Filter A to which no antifungal agent was added was obtained. That is, it has been found that solvent-soluble fungicides are unsuitable for application to the deodorizing filter targeted by the present invention, and that water-dispersed and water-soluble fungicides are suitable for use. [Mold generation test] Filter A (using a commercially available adhesive with 0.2% preservative added to the adhesive stock solution),
In addition, a mold generation test was conducted on filters G, H, and I that had been subjected to the anti-mildew treatment as described above.

[0038] The mold generation test conforms to IEC standard 68-2-10. The strain used is "Aspergillus niger"
and “Aspergillus terreus”. The number of inoculated spores was approximately 107/ml.
Pour 2 ml of spore solution onto a deodorizing filter cut into 3 cm pieces, and place in a petri dish with a lid at 30°C and 90% RH for 28 hours.
The cells were cultured for several days and their fungal potential was observed. Table 4 shows the criteria for mold generation. Note that no nutrient source was added. The test results are also shown in Table 5.

[0039]

[Table 4]

[0040]

[Table 5] As shown in Table 5, the anti-mold function of Filter H, which uses only a water-dispersed anti-mold agent, and Filter I, which uses only a water-soluble anti-mold agent, is different from that of Filter A. It's excellent. However, in particular, it has been found that the anti-mildew function of Filter G, which uses both anti-mildew agents in combination, is far superior to that of Filters H and I. Here, it is presumed that the water-dispersible moldproofing agent contributes to the moldproofing of the adhesive, and the water-soluble moldproofing agent contributes to the moldproofing of the paper, which is the base material. [Flame retardancy] Filter J was formed under the same conditions as Filter A except for the following changes, and the flame retardance of the filter was examined. a. Filter J Adhesive (solid content 50% in commercial product state) is mixed with 30% by weight of halogen flame retardant (main ingredient unknown) and the same amount of inorganic flame retardant (main ingredient unknown) based on the solid content. component antimony trioxide) was added.

[0041] Examples of the above-mentioned halogen flame retardants include tetrabromobisphenol A (TBA), 2,2-bis(4-hydroxy-3,5-dibromophenyl)propane, hexabromobenzene (HBB), and tris(2-dibromobenzene). ，
3-dibromopropyl) isocyanurate (TAIC-
6B), 2,2-bis(4-hydroxyethoxy-3,
5-dibromophenyl)propane (TBA-EO),
Examples include decabromodiphenyl oxide (DBDPO) and halogen-containing polyphosphate.

[0042] The inorganic flame retardants include red phosphorus,
Examples include tin oxide, antimony trioxide, zirconium hydroxide, barium metaborate, aluminum hydroxide, and magnesium hydroxide.

It is also possible to use a phosphorus-based flame retardant, and examples of this type of flame retardant include ammonium phosphate and tricresyl phosphate (TPC). [Combustion test] A combustion test was conducted on filters A and J. In the combustion test, a filter sample held horizontally on a wire mesh was exposed to fire for 60 seconds, and the burning time of the filter sample when released was measured. The number of repetitions was 5. Table 6 shows the test results.
Shown below.

[0044]

[Table 6] As shown in Table 6, halogen-based and inorganic adhesives are used.
Filter J, which was made with the addition of certain flame retardants, showed superior flame retardancy compared to Filter A, which was made with the commercially available adhesive.

[0045]

Effects of the Invention According to the present invention, an air conditioner is provided that has the general deodorizing effect as a deodorizing filter, and the low pressure loss and continuity of the deodorizing effect as a filter used for air conditioners. It becomes possible to provide a deodorizing filter for a dishwasher. Moreover, prevention of mold generation and improvement of flame retardancy of the filter can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an embodiment of a deodorizing filter according to the present invention.

FIG. 2 is a side view showing a state in which a filter according to the present invention is incorporated into a housing of an indoor unit of an air conditioner.

FIG. 3 is a diagram showing an example of the manufacturing process of a filter according to the present invention.

FIG. 4 is a perspective view showing the structure of a honeycomb lattice.

FIG. 5 is a graph showing the relationship between the amount of supported activated carbon and pressure loss based on changes in the cell size of the lattice.

FIG. 6 is a graph showing the relationship between the amount of supported activated carbon and pressure loss based on changes in particle size of activated carbon.

FIG. 7 is a diagram showing functional evaluation of a deodorizing filter based on the relationship between activated carbon dimensions and cell size.

FIG. 8 is a graph showing experimental results regarding CO concentration reduction in filters.

[Explanation of symbols]

10... Deodorizing filter, 12... Substrate, 14... Gas adsorbent,
16...Cell, 30...Indoor unit of air conditioner, 34
...Dust filter, 36...Heat exchanger.

Claims (3)

[Claims] 1. An air conditioner comprising a lattice-shaped filter base and gas adsorbent particles adhered to the filter base with an adhesive, wherein a flame retardant is added to the adhesive. Deodorizing filter for dishwashers. 2. The filter according to claim 1, wherein the flame retardant includes a halogen flame retardant and an inorganic flame retardant. 3. Thickness of the base body = about 15 mm or less, flat area of one cell of the lattice of the base body = about 0.20 to about 0.3.
5cm2, size of the above gas adsorbent particles = about 20 - about 6
0 mesh, the amount of gas adsorbent particles used per unit area of the substrate plane = about 400 to about 2000 g/m2, and the aperture ratio of the filter = about 50 to about 80%. 2. The filter described in 2.