JPH0685850B2 - Deodorizing filter for air conditioner - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a deodorizing filter for an air conditioner, and more specifically, it comprises a lattice-shaped filter substrate and activated carbon particles adhered to the filter substrate. Seed filter.

[Prior Art] Generally, only a coarse dust removal filter is attached to a conventional air conditioner, and the pressure loss of the filter is 0.1-0.2 mmAq (measured value at an air velocity of 1 m / sec,
The same applies hereinafter). On the other hand, in recent years, there has been a strong demand for removing submicron particles such as cigarette smoke and pollen, so that a high-density filter with a pressure loss of about 2 to 3 mmAq has been optionally used. However, the use of the high-density filter has a large pressure loss, which causes problems such as a decrease in air volume and an increase in noise. In order to address this problem, a dust removal mechanism with low pressure loss, such as an electrostatic precipitator or a filter using an electret fiber (semi-permanently polarized polyolefin fiber, disclosed in Japanese Patent Publication No. 56-47299). Came to be used.

However, since the dust removal mechanism with low pressure loss is not originally intended for deodorization, its deodorizing ability was low.

On the other hand, the applicant of the present application has proposed, in Japanese Patent Application No. 1-258748, a filter comprising a lattice-shaped filter substrate and particles of a gas adsorbent (mainly activated carbon) adhered to the filter substrate. This filter has a thickness of the above substrate = about 15
mm or less, flat area of one cell of the above-mentioned substrate lattice = about 0.20-about
0.35 cm ² , the size of the gas adsorbent particles = about 20 to about 60 mesh, the amount of gas adsorbent particles used per unit area of the substrate plane = about 400 to about 2000 g / m ² , the aperture ratio of this filter = about 50
-It is characterized by satisfying the condition of about 80%.

[Problems to be Solved by the Invention] In summary, the above-mentioned filter is different from the conventional grid filter with activated carbon in that the size of the activated carbon (gas adsorbent) particles is relatively large and the thickness of the filter is small. . Therefore, it is important to prevent the activated carbon from falling off during packing, distribution and use.

The present invention has been made based on such a viewpoint, and an object of the present invention is to provide a deodorizing filter for an air conditioner which is excellent in handling performance, with the main object of preventing the activated carbon from falling off.

[Means for Solving the Problems] In order to achieve the above object, in the filter of the present invention, a lattice-shaped filter substrate, gas adsorbent particles adhered to the filter substrate, and heat for covering the filter substrate are provided. It is characterized by comprising a highly air-permeable net cover made of fusible fibers, and heat-sealing ears formed on the peripheral edge of the net cover corresponding to the side portions of the base body.

In a preferred embodiment, the thickness of the substrate is about 15 mm or less,
Plane area of one cell of the above-mentioned substrate lattice = about 0.20-about 0.35c
m ² , the size of the gas adsorbent particles = about 20 to about 60 mesh,
Amount of gas adsorbent particles used per unit area of the substrate plane =
About 400-about 2000 g / m ² , aperture ratio of this filter = about 50-about 80
%, All of the above conditions are satisfied.

[Operation] According to the deodorizing filter of the present invention having the above-described configuration, the net cover that covers the base body prevents the user's hand from contacting the adsorbent (mainly activated carbon) attached to the base body. Can be prevented from falling off. On the other hand, since the net cover is highly breathable, it does not substantially increase the pressure loss of the filter.

[Examples] Structure and material Fig. 1 is a plan view showing an example of the deodorizing filter 10 according to the present invention. This filter has a lattice-shaped filter base 12
And a net cover 22 that covers the base body 12.

With the net cover 22 removed, the deodorizing filter 10
Is the aperture ratio (in the plane parallel to the paper surface of FIG. 1)
Of about 50 to about 80%, which results as a result of various conditions described below. The thickness of the filter 10 (perpendicular to the paper surface of FIG. 1) is 15 mm or less, preferably about 3 m.
It is over m.

FIG. 3 is a partially enlarged view showing the base 12. Book filter 10
Is different from the conventional filter 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 the figure. These features are as a deodorizing filter for air conditioner, low pressure loss, suitable deodorizing ability,
It is the key to satisfy the conditions such as long life.

The base 12 is made of a thin material such as paper, aluminum or plastic. When paper is used as the material, it can be impregnated with a phenol resin or the like to reinforce the strength. Also the base
12 can be flame-retarded. Since the thickness of the substrate 12 is substantially the same as the thickness of the filter 10, it is about 15 mm or less, preferably 3 mm or more. This thickness is for this filter 10
However, as shown in FIG. 4, it is finally determined that it is housed in the housing of the air conditioner.

In the illustrated example, the lattice-shaped pattern shape of the base 12 is a hexagonal so-called honeycomb shape, but this pattern shape can be any shape such as a rectangle and a triangle. However, the plane area of one cell 16 of the lattice (in the plane parallel to the paper surface of FIG. 2) is about 0.20 to about 0.35.
It becomes cm ² . This numerical value substantially means the density of the partition wall 18 for supporting the gas adsorbent particles 14.

The gas adsorbent particles 14 are made of activated carbon, but other types such as impregnated activated carbon can also be used. In addition, in order to deal with CO generation sources such as petroleum stoves, a catalyst capable of catalytically oxidizing CO can be used in combination with a deodorant. As this catalyst, a gold / oxide catalyst (disclosed in JP-A-60-238148, etc.) that does not die and activate even in the presence of water is desirable. The size of the gas adsorbent particles 14 is about 20 to about 60 mesh, and the amount of the gas adsorbent particles 14 used per unit surface area of the substrate 12 is about 400.
-About 2000 g / m ² .

The binder for adhering the gas adsorbent particles 14 to the base 12 is
It is desirable to use an adhesive to prevent the particles from falling off. Known adhesives such as acrylics, natural rubbers, synthetic rubbers, and silicones can be used as the adhesive, but in order to adhere strongly to the filter substrate so that activated carbon does not fall off, an adhesive with a high concentration is used. It is required that the agent is used and that the layer thickness thereof is increased to some extent. Therefore, the pressure-sensitive adhesive liquid used should have a high viscosity (about 10 to 50 poise), and the coating method should depend on the method capable of obtaining a thick layer.

The net cover 22 is made of a heat-fusible fiber having a composite structure,
For example, it has a structure in which a polypropylene core material and a polyethylene sheath material having a melting point lower than that by 20 ° C. or more are combined.
A heat-fusible fiber having a composite structure is disclosed in Japanese Examined Patent Publication (Kokoku) No. 52-37097, etc., and various types are already commercially available. Also, unlike this embodiment, it is possible to use a heat-fusible fiber made of a single material instead of the composite structure. In this example, the fiber diameter is about 0.2 mm and the mesh size is about 1.5 mm. The net cover 22 is coarse so as not to substantially increase the pressure loss of the filter 10,
It is important that it is highly breathable.

The net cover 22 is provided with the gas adsorbent particles 14 as described later.
The base body 12 after attachment is sandwiched between two nets, and the nets are heat-sealed along the peripheral edge of the base body 12 for sealing. For example, in the case of a filter having a total length of about 20 to 30 cm as in this embodiment, a heat-seal ear portion 24 of about 5 mm is formed around the filter. Proper dimensioning of the ears 24 is an important factor in ensuring the strength of the packaging of the cover 22.

Also provided in the cover 22 is a life indicator 26 which serves as an index of the service life of the filter. indicator
It is composed of a non-woven fabric of 26 electret fibers (semi-permanently polarized polyolefin fibers, disclosed in Japanese Patent Publication No. 56-47299) having an excellent dust absorption function. Indicator 26
The filter 10 is provided so as to cover a part of the lattice of the base 12.
As the contaminated air passes through it, it absorbs dust and discolors. The indicator 26 is not limited to a non-woven fabric of electret fibers, and may be any cloth-like body made of fibers having an excellent dust absorption function, having some breathability, and capable of recognizing discoloration.

The indicator 26 includes a band-shaped cloth arranged in a plow shape as shown in the figure, and a square or circular cloth-shaped filter 10
It is also possible to arrange in the center or at the corner. However, as will be described later, in the manufacturing process, the configuration shown in the illustrated embodiment is desirable because the indicator material can be continuously supplied and used. If a small circular or square indicator is used, the substrate after adsorbent 14 is applied
It would be desirable to have a manufacturing process in which the indicator is pre-bonded to 12, and then wrapped with a net cover 22.

Usage Mode FIG. 2 is a plan view showing a holder 30 for housing the filter 10. The holder 30 is a resin molded product, and has a holding portion 32 for sandwiching the filter 10 and a handle portion 34 for handling. The holding part 32 is composed of a pair of open / close frames that can be opened and closed via a hinge part 36, and the pair of frames is maintained in a closed state by a claw 38 attached to a free end of the upper frame in the drawing. The handle portion 34 is formed integrally with the lower frame of the holding portion 32. Most of the sandwiching portion 32 is formed as an opening 33, and most of the filter 10 is exposed to the outside.

The holder 30 is colored yellowish brown. This color is a filter 10
It is set to be approximately the same as the expected color of the indicator 26 at a given operating time indexed from its lifetime. That is,
The user can easily know the life of the filter 10 by comparing the colors of the indicator 26 and the holder 30.

Fig. 4 shows the filter 10 with the indoor unit 40 of the air conditioner.
FIG. 4 is a side view showing a state of being assembled in the housing 42 of FIG. The filter 10 is housed in the holder 30 shown in FIG.
Built in. The arrow in the figure indicates the direction of air flow. The filter 10 is provided in the air introduction passage subsequent to the dust filter 44 that is normally used. The air that has passed through the filter 10 and is deodorized is heated or cooled by the heat exchanger 46, and is supplied indoors by the action of the blower 50. The filter 10 also uses a heat exchanger instead of the air introduction passage.
It is also possible to arrange it in the air discharge passage after 46. In the figure, reference numeral 48 is a dew tray.

Manufacturing Method FIG. 5 is a diagram showing an example of a manufacturing process of the filter 10. First, a blank substrate having a predetermined thickness is supplied from the substrate feeder 52, and the adhesive is applied to the whole in the binder dipping portion 54. The blank substrate is then placed in a dryer 56,
A predetermined viscosity is given to the binder, and the odor of the binder solvent is blown off. After drying, blank substrate is cut
It is cut to a predetermined size by 58, and then the adsorbent attachment part
Sent to 62.

On the other hand, the adsorbent supply unit 62 supplies an adsorbent of a predetermined size to the adsorbent impregnating portion 64, and the adsorbent is adhered to the surface of the blank substrate via a binder. Next, the excess adsorbent that is incompletely attached to the substrate or the adsorbent is removed by the scrubbing section 66. Finally, the net cover 22 is packaged on the base body in the packaging section 68.

FIG. 6 is a side view showing a net cover packaging machine used in the packaging section 68. In the present packaging machine, the upper net material 72 and the lower net material 74 made of the above-mentioned heat-fusible fiber are respectively fed from the rolls 72r and 74r on the right side in the drawing. Further, the indicator material 76 made of the above-mentioned electret fiber is fed from the roll 76r so as to overlap the lower net material 74.

At the top of the heat sealing mold 82, the upper and lower net materials 7
The base 12 of a predetermined size, to which the adsorbent 14 is adhered, is inserted between the two and 74 by an appropriate means (for example, an automatic carrier or manual work). And here, the substrate 12 is a cylinder
The upper press 84 driven by 83 pushes the upper and lower net members 72, 74 into the mold 82. The pushed-in base body 12 is locked by abutting the stepped portion 86 in the mold. Further, in synchronization with the press 84, the pusher 88 driven by the cylinder 87 operates to support the lower surface of the base 12.

During the above pressing, the upper and lower net members 7 around the base 12
2, 74 are sandwiched between the upper peripheral surface of the mold 82 and the lower surface of the press 84. The upper peripheral surface of the mold 82 is heated by a suitable heat source contained in the mold 82, and the upper and lower net members 72 and 74 are bonded by heat sealing. The conditions of this heat sealing are, for example, if the upper and lower net materials 72, 74 are made of a double-structured fiber having the above-mentioned polyethylene sheath material, the temperature is about 140 ° C., the pressing pressure is 5 kg / cm ² or more, and the pressing time is 2 to
It will be 5 seconds.

The substrate 12 covered with the heat-sealed net material is subsequently sent onto the cutter holder 92. A punching die 94 driven by a cylinder 93 is arranged above the receiving table 92, and this is lowered in synchronism with the conveyance of the base body 12 to punch the base body together with the net materials 72 and 74. At this time, the edge portion 24 of the net cover 22 is dimensioned so that about 5 mm remains on the peripheral portion of the base body 12 as shown in FIG. Base with punched net cover 22
12, that is, the filter 10 is extruded by a pusher (not shown) or the like in a direction perpendicular to the paper surface of FIG.
Collected by any suitable means.

The remaining portion 78 of the upper and lower net materials and the indicator material is collected by the winding roll 78r. The rotation speed of the roll 78r is controlled by the adjacent manual rotation handle 96, that is, the feeding speed of the upper and lower net members 72, 74 and the indicator member 76 is also controlled by the handle 96. Regardless of this embodiment, it is possible to automate the entire system.

How to test the function of this deodorizing filter The pressure loss of the deodorizing filter is measured by measuring the inner dimensions of 10 x 10 cm and length.
A 220 cm square transparent acrylic wind tunnel was used, and the deodorizing filter before packaging the net cover 22 was attached to the center of the wind tunnel. 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 burned in a stainless steel chamber having a volume of 17 m ³ . After 15 minutes, a fan was operated in the chamber to make the inside uniform, and the deodorizing filter was attached to the filter mounting portion of a commercially available air purifier to perform the operation. The filter opening is 0.
065m ² , treated air volume is 3.9m ³ / min. Thirty minutes after the start of the operation of the air purifier, the air in the chamber was collected in an odorless plastic bag having a capacity of 10 liters and subjected to a sensory test. The sensory test was conducted by 15 people excluding those with abnormal olfaction in advance.

The effect of reducing CO concentration is as follows. First, the same chamber as in the sensory test was adjusted so that the CO concentration was 100 ppm. Next, using the present deodorizing filter under the same air purifier and conditions as in the sensory test, the attenuation of CO concentration was measured. The measuring instrument used is Gastech CM25
Is 10.

Examination of Conditions of the Deodorizing Filter The conditions such as the cell size of the lattice of the substrate 12, the size of the gas adsorbent particles 14 and the usage amount thereof were examined as follows.

a. Cell size of the lattice Fig. 8 is a graph showing the relationship between the amount of activated carbon supported and the pressure loss based on the change in the cell size of the lattice. The filter used in the experiment is the state before wrapping the net cover 22,
FIG. 3 shows a structure according to the present invention. The base 12 has a honeycomb lattice structure as shown in FIG. 7, and has a thickness of
It is 5 mm. The term cell size of the lattice here refers to "l" in FIG. Activated carbon was used as a gas adsorbent.

In the graph of FIG. 8, curve a shows the results for the filter having an activated carbon particle size of 32-60 mesh, and curve b shows the result for the filter having an activated carbon particle size of 20-42 mesh. The straight line D shows the pressure loss primary limit line (0.5 mmaq), and the straight line L shows the pressure loss secondary limit line (1.0 mmAq).

In the graph of FIG. 8, the points indicated by the plot symbols are as follows.

“×”… cell size 3/8 in (cell flat area approx. 0.8 cm ² ) “Δ”… cell size 1/4 in (cell flat area approx. 0.35 cm ² ) “○”… cell size 3/16 in (cell Flat area approx. 0.2 cm ² ) “□”… cell size 1/8 in (cell flat area approx. 0.09 cm ² ) As can be seen from the figure, cell size 1 / indicated by “□”
With an 8-inch substrate, the pressure loss exceeds the secondary limit line L. On the other hand, with a substrate having a cell size of 3/8 in, which is indicated by “x”, a sufficient amount of activated carbon cannot be obtained. Therefore, a suitable cell size of the substrate grid is about 1/4 to about 3/16 in. As described above, the shape of the lattice does not have to be limited to the honeycomb shape, and therefore, when the above size is expressed by the cell plane area, this range is about 0.2 to about 0.35 cm ² .

b. Particle size and usage of gas adsorbent Fig. 9 is a graph showing the relationship between the amount of activated carbon supported and the pressure loss based on the change in particle size of activated carbon. The filter used in the experiment is the state before wrapping the net cover 22,
FIG. 3 shows a structure according to the present invention. All the substrates 12 have a honeycomb lattice structure as shown in FIG.

In the graph of FIG. 9, a curve c is a filter of a substrate having a cell size of 3/16 in (cell flat area of about 0.2 cm ² ) and a thickness of 5 mm, and a curve d is a cell size of 1/4 in (cell flat area of about 0.35 cm ² ) Is a filter for a substrate with a thickness of 5 mm, curve e is a filter for a substrate with a cell size of 3/16 in (cell flat area of about 0.2 cm ² ) and a thickness of 10 mm, curve f
Has a cell size of 1/4 in (cell flat area of about 0.35 cm ² ) and a thickness of 10 m
Results are shown for a filter on the substrate m. The straight line D shows the pressure loss primary limit line (0.5 mmAq), and the straight line L shows the pressure loss secondary limit line (1.0 mmAq).

In the graph of FIG. 9, the points designated by the plot symbols are as follows.

“×”… particle size 60-100 mesh “Δ”… particle size 32-60 mesh “○”… particle size 20-42 mesh “□”… particle size 6-10 mesh As can be seen from the figure, “□” In the case of 6-10 mesh activated carbon represented by, the pressure loss far exceeds the secondary limit line L. On the other hand, a sufficient amount of activated carbon cannot be obtained with the 60-100 mesh activated carbon indicated by "x". Therefore, the particle size of the activated carbon is appropriately in the range of about 20-60 mesh.

Further, FIG. 9 shows the amount of activated carbon carried (that is, the amount used) per unit area of the substrate plane under each condition in a state where the activated carbon is adhered to the entire surface of the substrate. This range of usage,
Considering the filter thickness up to 15 mm, the amount of activated carbon used in the particle size range is considered to be about 2000 g / m ² or less. Also, the same amount is required to be at least about 400 g / m ² when considering the deodorizing effect. This value corresponds to the usage on substrates with a thickness of about 3 mm.

Further, it can be seen from FIG. 9 that the pressure loss is not significantly affected by the change in the thickness of the substrate in the range of the particle size of the activated carbon according to the present invention.

The functional evaluation of the deodorizing filter based on the relationship between the size of activated carbon and the cell size is shown in Fig. 10. The shaded area in the figure is the condition range of the filter according to the present invention.

Example and Function Test Results Comparison of deodorizing effect between the case where no air cleaner is installed and the case where an air cleaner equipped with filters A, B, C, D and E within the condition range of the present invention is used. Table 2 shows the results of the sensory test. The number in the table is 6
Based on the graded odor intensity method (see Table 1). From the following comparison results, a significant difference was observed at a risk rate of 1%, demonstrating the effectiveness of the filters A-E according to the present invention for deodorization.

The filter E was also subjected to the CO concentration reduction test. As a result, as shown in FIG. 11, the effectiveness of the filter E for reducing the CO concentration was proved. First
In FIG. 11, the curve h shows the result when the filter E was attached, and the curve i shows the result when the filter was not attached.

The manufacturing conditions of the used filter are as follows.

Filter A, B Cell size 3/16 in (cell flat area about 0.2 cm ² ) and 5 mm thick paper honeycomb core were spread by hand, and then commercially available emulsion adhesive (SK Dyne E-3008B manufactured by Soken Kagaku) ) And the adhesive was applied. Put it in a dryer and dry it at 100 ° C for 2 hours, and weigh it.
It was 1300 g / m ² . To this, commercially available activated carbon (GG manufactured by Kuraray Chemical Co., Ltd.) having two kinds of particle sizes (20-42 mesh, 32-60 mesh) was attached. 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 amounts of activated carbon used in filters A and B were 790 and 600 g / m ² , respectively, and the pressure losses were 0.43 and 0.23 mmAq, respectively.

b. Filters C, D Cell size 1/4 in (cell flat area approx. 0.35 cm ² ) and expanded aluminum honeycomb core with a thickness of 10 mm, using a commercially available solvent-based adhesive (SK Dyne E-1200 manufactured by Soken Kagaku). It was put in the tank of No. 2 and the adhesive was applied. It was put in a dryer and dried at 120 ° C for 3 hours, and the weight was measured.
It was 500 g / m ² . Commercially available activated carbon (GG manufactured by Kuraray Chemical Co., Ltd.) having two kinds of particle sizes (20-60 mesh, 32-60 mesh) was attached thereto. Filter C was prepared by impregnating activated carbon having a particle size of 20-42 mesh, and filter D was prepared by impregnating activated carbon having a particle size of 32-60 mesh. The amounts of activated carbon used in filters C and D were 1300 and 1000 g / m ² , respectively, and the pressure loss was 0.32 and 0.13 mmAq, respectively.

c. Filter E Cell size 3/16 in (cell flat area about 0.2 cm ² ), thickness 10 mm
The expanded aluminum honeycomb core of 1 was placed in a tank of a commercially available solvent-based adhesive (SK Dyne E-1200 manufactured by Soken Chemical Industry Co., Ltd.) to apply the adhesive. It was placed in a dryer and dried at 100 ° C for 2 hours, and the weight was measured.
It was 0 g / m ² . Commercially available activated carbon (GG manufactured by Kuraray Chemical Co., Ltd.) having a particle size of 20-42 mesh and a gold / oxide catalyst (manufactured by Toyo CCI) were impregnated at a volume ratio of 8: 2. The amount of activated carbon used was about 1200 g / m ² , and the pressure loss was 0.59 mmAq.

Table 1 6 grade odor 0 no feel 1- faintly felt 2 clearly feel 3- strongly felt 4 very strongly feel 5- extremely strongly feel Table 2 Article matter odor intensity air purifier without average 2.50 fluctuations 0.37 Filter A Average 1.53 Fluctuation 0.44 Filter B Average 1.52 Fluctuation 0.27 Filter C Average 1.70 Fluctuation 0.44 Filter D Average 0.75 Fluctuation 0.48 Filter E Average 1.45 Fluctuation 0.41 [Effect of the Invention] According to the present invention, a general deodorizing effect as a deodorizing filter is obtained. It is possible to provide a deodorizing filter for an air conditioner, which is appropriately provided with low pressure loss as a filter used for the air conditioner and continuity of the deodorizing effect. In particular, the net cover that covers the filter substrate prevents the user's hands from coming into contact with the adsorbent (mainly activated carbon) attached to the substrate, preventing the activated carbon from falling off and providing excellent filter handling performance. It becomes a thing.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the deodorizing filter according to the present invention. FIG. 2 is a plan view showing a holder for accommodating the filter shown in FIG. FIG. 3 is an enlarged plan view showing the filter shown in FIG. 1 excluding the cover. FIG. 4 is a side view showing a state in which the filter according to the present invention is incorporated in the housing of the indoor unit of the air conditioner. FIG. 5 is a diagram showing an example of a manufacturing process of the filter according to the present invention. FIG. 6 is a side view showing the net cover packaging machine. FIG. 7 is a perspective view showing the structure of a honeycomb lattice. FIG. 8 is a graph showing the relationship between the amount of activated carbon carried and the pressure loss based on the change in the cell size of the lattice. FIG. 9 is a graph showing the relationship between the amount of activated carbon carried and the pressure loss based on the change in particle size of activated carbon. FIG. 10 is a diagram showing the functional evaluation of the deodorizing filter based on the relationship between the size of activated carbon and the cell size. FIG. 11 is a graph showing the experimental results regarding the reduction of the CO concentration of the filter. 10 …… deodorizing filter, 12 …… substrate, 14 …… gas adsorbent,
16 …… cell, 22 …… net cover, 24 …… ear, 26 ……
indicator

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toru Sakurai 6-2 Umegaoka, Midori-ku, Yokohama-shi, Kanagawa Japan Tobacco Inc. Central Tobacco Research Center (72) Inventor Katsuhiko Kin, 336 Tatehara, Fuji City, Shizuoka Toshiba Corporation Inside the Fuji Factory (72) Inventor Kaoru Mochizuki 336 Tatehara, Fuji City, Shizuoka Prefecture Toshiba Corporation Inside the Fuji Factory

Claims (2)

[Claims] 1. A lattice-shaped filter substrate, gas adsorbent particles adhered to the filter substrate, a highly air-permeable net cover of heat-fusible fiber covering the filter substrate, and a side portion of the substrate. And a heat-sealing ear portion formed on the periphery of the net cover, the deodorizing filter for an air conditioner. 2. The thickness of the substrate is about 15 mm or less, and the plane area of one cell of the lattice of the substrate is about 0.20 to about 0.35c.
m ² , the size of the gas adsorbent particles = about 20 to about 60 mesh, the amount of the gas adsorbent particles used per unit area of the substrate plane =
The filter according to claim 1, which satisfies all of the above conditions of about 400 to about 2000 g / m ² , and the aperture ratio of the present filter = about 50 to about 80%.