JP4948325B2 - Deodorizing filter and air cleaning device - Google Patents

Description

  The present invention relates to a deodorizing filter that is thin and small, has a low pressure loss and has a high deodorizing performance, and an air purifier using the deodorizing filter.

  Conventional deodorizing filters are made by placing granular activated carbon and adsorbent in a plate shape, covering them with a polymer organic material such as polyethylene and polypropylene, and contacting the activated carbon and adsorbent with harmful gases and unpleasant odors that pass through the filter. The surface area of the resin is increased to obtain high deodorizing performance.

  Another conventional deodorizing filter supports paper and ceramic paper or cordierite formed in a honeycomb shape to support the catalyst and adsorbent, ensuring a large surface area, and further reducing the pressure loss of the filter during ventilation. (See, for example, Patent Document 1).

Japanese Patent Laid-Open No. 2001-120648 (FIG. 1, paragraphs 0019 and 0028)

  In the conventional deodorizing filter with a structure in which granular activated carbon and adsorbent are spread, as described above, in order to increase the contact surface area with harmful gases and unpleasant odors, a plate of granular activated carbon and adsorbent is increased. Since it is made to cover with molecular organic material, pressure loss will become high. If a predetermined air volume is obtained with a high pressure loss, noise due to wind noise passing through the filter increases.

  Further, in the conventional filter formed in the honeycomb shape as shown in Patent Document 1, the catalyst and the adsorbent are carried on a plane parallel to the inflow direction of harmful gas and unpleasant odor, which is harmful. The contact probability of the gas and unpleasant odor with the catalyst and the adsorbent is low, the effective catalyst and adsorbent carrying area contributing to deodorization is small, and the deodorizing performance is deteriorated.

  In order to suppress pressure loss, the inflow area of harmful gas and unpleasant odor, that is, the area of the opening through which harmful gas and unpleasant odor formed in the filter can pass must be increased. In order to improve the deodorizing performance, it is necessary to increase the thickness of the filter or increase the area of the filter opening to increase the surface area of contact with the harmful gas of the filter. As described above, the conventional deodorization filter has a problem that when the deodorization filter having high deodorization efficiency and low pressure loss is obtained, the deodorization filter is increased in size, and accordingly, the air cleaning device must be increased in size. .

  Furthermore, in any of the conventional deodorizing filters, harmful gases adsorbed by the deodorizing filter or the like in a high humidity environment where the relative humidity is generally 60% (temperature: 25 ° C.) or more, in which an unpleasant odor is likely to occur. There was a problem that an unpleasant odor reacts with moisture present in the air passing through the filter, and is desorbed together with the moisture and released into the outside air again. In addition, in the high humidity environment, there is a problem that moisture present in the air passing through the filter covers the adsorption surface, and aging deterioration of the deodorizing performance is promoted.

  The present invention has been made to solve the above problems, and is a thin and small filter having a low pressure loss and a high deodorizing performance, and an air cleaning device using this filter. The purpose is to obtain. Another object of the present invention is to obtain a thin and small deodorizing filter in which harmful gas once adsorbed on the deodorizing filter is not desorbed from the deodorizing filter, and an air cleaning device using the filter.

The deodorizing filter according to the present invention is a filter having a random network structure composed of fibers having a fiber diameter of 5 to 30 μm and a basis weight of 40 to 400 g / m ² , and has a pore volume of 0.2 to 0.4 cc / g, the specific surface area by BET nitrogen adsorption is 100-150 m ² / g, the average pore diameter is 50-100 Å, and the molar ratio of SiO ₂ and Al ₂ O ₃ is 40 or more and 500 or less. , and the and ammonium ions substituted, Na metal substituted, Fe metal substituted, or a Cu metal substituted, and, M FI-type, beta-type, or zeolite is mordenite, the pore size of the zeolite comprising a deodorizing agent comprising a weight ratio of 23, and 100~900g / m ² carrying the total amount of the three components: the active carbon having larger pores, 47: 10 A deodorizing filter for the air-cleaning apparatus.

  According to the present invention, in addition to manganese oxide and zeolite as a component of the deodorizer supported on the deodorization filter, activated carbon is mixed, so that the deodorization performance deteriorates over time and harmful gases once adsorbed in a high humidity environment are removed. The amount released into the outside air again can be suppressed. Since such a phenomenon does not occur with activated carbon alone, it has been found that the above-described effects can be obtained by combining manganese oxide and activated carbon. The amount of odor desorption decreases as the activated carbon mixing ratio increases, but by setting the ratio (weight ratio) of manganese oxide, activated carbon and zeolite to 47:23:10, harmful gases once adsorbed on the filter The least amount of desorption.

Embodiment 1 FIG.
1 is a configuration diagram showing a deodorizing filter according to Embodiment 1 of the present invention, FIG. 1 (a) is an external view of the deodorizing filter, and FIG. 1 (b) is a deodorizing filter in a filter frame in FIG. 1 (a). FIG. The deodorizing filter of the present invention is a fibrous deodorizing filter B carrying a deodorizing agent A, and the deodorizing agent A includes, as shown in FIG. , Volatile organic compounds such as formaldehyde, toluene, xylene and benzene (hereinafter referred to as toxic gases and unpleasant odors) volatile from acetic acid, methyl disulfide, isovaleric acid, and building solvents ), And activated carbon 1 that adsorbs harmful gases and unpleasant odors in the air and zeolite 3 are mixed, and the manganese oxide 2, zeolite 3, and activated carbon 1 are mixed in a filter frame 5. The deodorizing filter B is constituted by being carried by the unit 4.
First, the zeolite 3 is capable of removing harmful gases and unpleasant odors in the air at higher speed than the manganese oxide 2 by adsorption action, and removing harmful gases and unpleasant odors that cannot be removed by the manganese oxide 2. The zeolite preferably used in the present invention has a high SiO2 / Al2O3 molar ratio, that is, a hydrophobic zeolite. Specifically, the SiO2 / Al2O3 molar ratio is 40 or more, preferably 50 or more, more preferably 70 or more, 500 The following zeolites are exemplified, such as MFI type, beta type zeolite, and mordenite. The type is preferably proton type, ammonium ion substitution type, Na metal, Fe metal, or Cu metal substitution type. These deodorizing filters carrying a deodorizing agent containing a hydrophobic zeolite as a component can maintain an excellent deodorizing rate for a long period of time, particularly under high humidity.
On the other hand, the manganese oxide 2 can be removed by decomposing harmful gases and unpleasant odors that cannot be removed by the chemical reaction. The manganese oxide preferably used in the present invention has a pore volume of 0.2 to 0.4 cc / g, a specific surface area of BET nitrogen adsorption of 100 to 150 m ² / g, and an average pore diameter of 50 to 100 angstroms. The range is porous manganese oxide. A deodorant formed by using this manganese oxide in combination with the zeolite can maintain a particularly excellent deodorization rate for a long time under high humidity.
Since the activated carbon 1 has a large surface area because it has many pores having a larger pore diameter than zeolite, it can adsorb a harmful gas or unpleasant odor having a relatively large molecular weight that cannot be adsorbed by zeolite.

  In the supporting step, the deodorizing agent A as described above is optimally prepared for the viscosity of the slurry and is uniformly supported on the filter fiber 4. For this reason, the increase in the pressure loss of the filter due to non-uniformity such as clogging can be suppressed, and the effective surface area of the deodorizer is increased to obtain high deodorization performance. As a result, the amount of deodorant that can be carried on the fiber surface per unit volume increases, so that sufficient deodorization performance can be obtained even in a filter having a very small weight of fiber per unit area (hereinafter referred to as a basis weight).

FIG. 2 is a graph showing the relationship between the amount of deodorant carried and the deodorization rate in the deodorization filter of the present invention. Here, the amount of the deodorant supported refers to the amount of the deodorizer A supported on a substrate such as a fiber or a honeycomb per unit area. And the deodorization rate is computed as follows. To complete combustion of five cigarettes in 1m ³ boxes to measure the removal ratio of tobacco odor after aeration for 30 minutes against deodorizing filter disposed within a box, using a detector tube, in the main component of tobacco odor The removal rate of a certain acetaldehyde, acetic acid, and ammonia for three odors is measured, and the deodorization rate (hereinafter referred to as η) is calculated based on the following formula.
η = {(acetic acid removal rate) + (ammonia removal rate) + (acetaldehyde removal rate) × 2} / 4

As shown in FIG. 2, a honeycomb filter used as a conventional deodorizing filter requires a deodorant carrying amount of 250 g / m ² or more in order to achieve a deodorization rate of 80% or more. By using a deodorizing filter carrying an agent, a deodorization rate of 80% can be achieved with a deodorant carrying amount of 100 g / m ² . Thus, since the deodorizing filter of the present invention requires a smaller amount of deodorant than the conventional honeycomb filter and the cost of the substrate itself is low, it is possible to provide a filter having high deodorizing performance at low cost. it can.

FIG. 3 shows a comparison between the deodorizing filter of the present invention and the conventional activated carbon filter when the amount of the deodorizing agent supported per filter volume is the same regarding the relationship between the filter volume V (cm ³ ) and the deodorizing rate η (%). It is a graph.
As shown in FIG. 3, in the conventional activated carbon filter, the deodorization rate η (%) of the filter is η <0.15 × V. On the other hand, in the deodorizing filter of the present invention, η (%) is η ≧ 0.15 × V (where η is 100 or less), and therefore the deodorizing filter of the present invention satisfying the above η ≧ 0.15 × V is It shows that the deodorizing performance per filter volume is extremely high. As described above, the volume of the deodorizing filter of the present invention can be reduced while maintaining the same high deodorizing performance as that of the conventional deodorizing filter, and the air purifier can be downsized accordingly.

Furthermore, in the conventional filter, in order to obtain the above deodorizing performance at 35 Pa or less, which is a value capable of suppressing noise caused by the pressure loss of the filter to 50 dB or less, which is generally felt noisy, a volume of 1000 cm ³ or more is obtained. In order to obtain the above deodorizing performance at a volume of 600 cm ³ or less, the pressure loss was 50 Pa or more. By using the deodorizing filter of the present invention, the pressure loss was 35 Pa or less and the filter volume was Since a deodorizing filter with a relatively low pressure loss can be realized at 600 cm ³ or less, the diameter or thickness of the blower fan that is the power of the air cleaning device can be minimized. For this reason, the air purifier can be thinned. Therefore, by installing a deodorizing filter that satisfies the above three conditions in the air purifier, the air purifier main body can be made thinner and smaller. At this time, by setting the filter volume to 600 cm ³ or less, a filter having an area equivalent to the fan diameter can be obtained, so that the entire filter can be uniformly ventilated without increasing the distance between the fan and the filter.
That is, by installing the deodorizing filter of the present invention in the air purifier, the air purifier main body can be made thinner and smaller.

  Further, in an environment where the relative humidity is generally 40 to 60% (temperature 25 ° C.) which is said to be comfortable, even if the odor adsorbed on the deodorizing filter does not re-release, the environment where the relative humidity is higher than 60%. Inside, it becomes easy to release again. Therefore, by setting the mixing ratio (weight) of manganese oxide, activated carbon and zeolite to 47:23:10, the deodorizing performance of the filter deteriorates with time even in the high humidity environment described above. In the course of time, the amount of harmful gas once adsorbed and released again into the outside air can be suppressed to 1% or less. FIG. 4 shows the relationship between the activated carbon mixing ratio in the deodorizer and the re-release rate of acetaldehyde, which is an unpleasant odor component. After adsorbing 0.08 mg of acetaldehyde to 24 mg of a deodorant mixed with manganese oxide, activated carbon and zeolite, it is desorbed when high-purity air with a relative humidity of 80% (room temperature 25 ° C.) is vented to the outside air. The amount of released acetaldehyde decreases when the ratio of the activated carbon to be mixed is increased, and when the content is 23%, the re-release rate can be suppressed to 1% or less. This is because the amount of acetaldehyde desorbed by the activated carbon-only filter, which is a conventional deodorizing filter, is 31%. Therefore, it is considered that the adsorbing power of harmful gas is increased by mixing manganese oxide and activated carbon. At this time, the amount of acetaldehyde desorbed with respect to the inflow of high-humidity air can be suppressed by using a highly hydrophobic material for zeolite.

In the deodorizing filter according to the present invention, the fiber diameter was 5 to 30 μm, the basis weight of the fiber was 40 to 400 g / m ^2, and the amount of the deodorizer supported on the fiber was 100 to 900 g / m ² . Further, the fibers 4 are made of silicon oxide, transition metal such as nickel, copper, iron, cobalt, or inorganic material mainly composed of one or more of carbon, or polypropylene, polyester, polyethylene, acrylic, aramid, polyamide. Of these, it was composed of one or more kinds of polymer organic materials.
The reason for limiting to the above numerical range is as follows.
When the deodorization rate with respect to the filter volume V (cm ³ ) is η (%), in order to satisfy η ≧ 80% using the deodorization filter of the present invention, as shown in FIG. The deodorant carrying amount needs to be 100 g / m ² or more. However, if the deodorizing agent carrying amount exceeds 900 g / m ² , the adhesion strength for holding the deodorizing agent on the fiber increases with the carrying amount. It becomes weak suddenly. FIG. 5 shows the total amount of deodorizing agent that is removed by manually rubbing the surface of the deodorizing filter. When the amount of the deodorizing agent carried on the deodorizing filter is increased, the amount of deodorizing agent falling off (powder falling amount) is also rapidly increased, and the deodorizing performance is lowered. In addition, when the fiber diameter is 30 μm or more, the fiber is easily broken, and the deodorizing agent supported on the fiber also falls off at the same time, leading to deterioration of the deodorizing performance. Furthermore, if the fiber diameter is less than 5 μm, the fiber softens, so the amount of binder used to form the filter increases, and it is necessary to select a fiber diameter of 5 μm or more as a result. Further, if the fiber areal weight is less than 40 g / m ² , it is not possible to carry a deodorant carrying amount of 100 g / m ² or more necessary to satisfy the above conditions, while it exceeds 400 g / m ² . The deodorant cannot be uniformly supported on the fiber, and the filter is clogged due to the occurrence of unevenness of the deodorant.

  The fiber 4 is made of, for example, a binder composed of an organic compound mainly composed of at least one of acrylic resin, melamine resin, and urea resin, or an inorganic compound mainly composed of at least one of silica and alumina. The retained manganese oxide zeolite and activated carbon are supported.

  Formaldehyde volatilized from acetic acid, methyl disulfide, isovaleric acid, and building solvents as well as the four major malodorous components of acetaldehyde, ammonia, hydrogen sulfide, and trimethylamine by supporting the above manganese oxide 2 and activated carbon 1 Reduce volatile organic compounds such as toluene, xylene and benzene to below harmful levels.

  From the above, since the deodorizing filter is formed of fibers, a surface area larger than that of the conventional honeycomb filter can be obtained with respect to the same filter volume, and a mesh formed by overlapping the fibers and the fibers is overlapped. Since the structure causes turbulent flow in the filter, the probability of contact with particles also increases.

FIG. 6 shows a comparison of the acetaldehyde removal performance between the conventional honeycomb-shaped deodorizing filter of Embodiment 1 of the present invention and the deodorizing filter of the present invention. As a result of measuring the attenuation of acetaldehyde concentration in a 1 m ³ box for 30 minutes when a wind tunnel with a 100 cm ² deodorizing filter installed in a 1 m ³ box filled with 1 ppm of acetaldehyde and ventilated at a wind speed of 1 m / s. The deodorizing filter of the invention has the same deodorizing performance with a deodorizing agent amount 2/5 times that of the conventional honeycomb-shaped deodorizing filter.

  FIG. 7 is a side cross-sectional view showing Embodiment 1 of the air cleaning device to which the above-described deodorizing filter of the present invention is applied. The air purifying device 6 in FIG. 7 includes a suction port 7, a dust collection filter 8, a deodorizing filter 9, a blower fan 10, and a blowout port 11 in order from the suction port side. The deodorizing filter 9 is the same as the deodorizing filter shown in FIG.

  Hereinafter, the operation of the air cleaning apparatus according to Embodiment 1 will be described with reference to FIG. Dust, harmful gas, and air containing unpleasant odors are sucked from the suction port 7 in the direction of the wind 12 indicated by the arrow, and after passing through the dust collecting filter 8, the dust is removed. The unpleasant odor is removed, and clean air is discharged from the blowout port 11 in the direction of the wind 12 through the blower fan 10.

  Since the deodorizing filter 9 used in the air cleaning device 6 shown in FIG. 7 has a fiber-shaped mesh structure, the area of the opening through which harmful gas flows is larger than that of a deodorizing filter having a mesh structure knitted at high density. The pressure loss of the deodorizing filter is also lower. For this reason, the deodorizing filter 9 having a large opening area allows harmful gases and unpleasant odors to flow from any direction with respect to the filter surface. As a result, when the deodorizing filter 9 of the present invention is actually incorporated into the air cleaning device, the entire surface of the filter can be ventilated even if the deodorizing filter 9 is close to the blower fan 10, so that it is larger than the suction area of the blower fan 10. Even when the deodorizing filter 9 having an area is disposed, the deodorizing performance corresponding to the entire area of the filter can be obtained, and the depth of the air cleaning device 6 can be reduced.

Embodiment 2. FIG.
FIG. 8 is a side cross-sectional view showing the configuration of the air cleaning device in the second embodiment of the present invention, and the deodorizing filter in the first embodiment is also used in the second embodiment. The air purifying apparatus of FIG. 8 collects dust from at least one of the suction port 7 for sucking air, the deodorizing filter 9 of the present invention, pollen and dust in the air, and fine particles such as dust in order from the suction port side. The filter 8, the blower fan 10 that applies suction to the suction port 7, the blowout port 11, the vaporization element 13 provided at the lower part of the blower fan 10, the water storage tank 14, the vaporization element 13, and the water storage provided at the lower part of the water storage tank 14 The tray 15 is configured.

  Hereinafter, the operation of the air cleaning apparatus in the second embodiment will be described with reference to FIG. Toxic gases and unpleasant odors are sucked in the direction of the wind 12 from the suction port 7 and the detoxified gas removed on the deodorizing filter 9 passes through the dust collecting filter 8 to remove dust. It is divided into a gas that passes through and a gas that passes through the vaporizing element 13 and then passes through the blower fan 10, and clean air is discharged in a state where dry air and humidified air are mixed in front of the air outlet 11. The blower fan 10 is arranged at the upper part of the vaporizing element 13 and is configured by a double-suction fan that sucks in gas directly from the deodorizing filter 9 and gas flowing in from the vaporizing element 13 from one side. The water storage tray 15 is disposed under the vaporizing element 13 and the water storage tank 14, and water flowing out of the water storage tank 14 is stored in the water storage tray 15, and the lower part of the vaporization element 13 is immersed.

  At this time, the water storage tank 14 is installed outside the ventilation path inside the air purifier 6. The vaporizing element 13 is composed of a filter made of a non-woven fabric formed of organic or inorganic material including hygroscopic zeolite or silica, and the water stored in the water storage tray 15 is placed from the lower part of the submerged vaporizing element 13 to the upper surface of the element. It is a filter having a water absorption force to suck up to. Further, the vaporizing element 13 is supported on a resin surface in which zeolite or silica having hygroscopicity is formed of organic or inorganic, and forms a water film on the surface of the vaporizing element by contacting with water stored in the water storage tray 15. It may be.

  In the above structure, the mixing ratio of manganese oxide, activated carbon and zeolite supported on the deodorizing filter 9 is set to 47:23:10 as shown in the first embodiment, so that the adsorption / deodorizing filter 9 is used as the vaporizing element 13. Deterioration of deodorization performance can be suppressed even when close to each other.

  Moreover, since the odor gas which flows in is removed by the deodorizing filter 9 by the said structure, the debrominated gas will pass the vaporization element 13, and clean humid air will be discharged | emitted from the blower outlet 11. FIG.

  Further, since clean air passes through the vaporizing element 13, it is possible to suppress the growth of bacteria and mold on the vaporizing element 13, and there is no concern that the bacteria propagated on the vaporizing element 13 are released to the outside of the aircraft. Furthermore, the deterioration of water retention of the vaporizing element 13 can be reduced.

  Moreover, the ventilation fan 10 is arrange | positioned at the upper part of the vaporization element 13, and can make the whole air cleaning apparatus 6 thin.

  As described above, according to the second embodiment, since the vaporizing element for humidification is further provided and the adsorbent carried on the deodorizing filter is made hydrophobic, the effect of the first embodiment while suppressing the deterioration of the deodorizing performance. Can be played.

Embodiment 3 FIG.
FIG. 9 is a side cross-sectional view showing the configuration of the air cleaning device in the third embodiment of the present invention, and the deodorizing filter in the first embodiment is also used in the third embodiment. The air cleaning device 6 includes a suction port 7, a dust collection filter 8, a vaporizing element 13, a deodorizing filter 9, and a blower fan 10 in order from the suction port side.
Next, the operation will be described. As shown in FIG. 9, the gas flowing in the left direction (wind direction 12) from the suction port 7 passes through the dust collection filter 8 and the vaporizing element 13, then passes through the deodorization filter 9 and is humidified from the blowout port 11. Air is discharged in the upward direction (wind direction 12). The vaporizing element 13 is composed of a filter made of an organic or inorganic non-woven fabric containing hygroscopic zeolite or silica, has a means for holding a solvent at the bottom, and feeds the solvent up to the upper surface of the vaporizing element 13 It is a filter having power. Further, the vaporizing element 13 is supported on a resin surface in which zeolite or silica having hygroscopicity is formed of organic or inorganic, and forms a water film on the surface of the vaporizing element by contacting with water stored in the water storage tray 15. It may be. The solvent held in the vaporizing element is water, hydrogen peroxide water or electrolyzed water. By using a hydrogen peroxide solution or electrolyzed water as the solvent retained in the vaporization filter, the sterilizing ability can be enhanced.

  In the above structure, the deodorizing filter 9 carries a deodorizing agent having a mixing ratio of manganese oxide, activated carbon and zeolite of 47:23:10, so that the moisture absorption of the zeolite can be achieved even when the deodorizing filter 9 is close to the vaporizing element 13. Deterioration of deodorizing performance can be suppressed by the ability.

  With the structure described above, the solvent held on the vaporizing element is sprayed on the deodorizing filter, and the deodorizing filter can be cleaned and the deodorizing performance can be recovered.

1 is a configuration diagram showing a deodorizing filter in Embodiment 1 of the present invention. It is the figure which compared the deodorizing rate performance per deodorant loading amount of the honeycomb-shaped deodorizing filter in Embodiment 1 of this invention, and the deodorizing filter of this invention. It is the figure which compared the deodorizing rate performance per filter volume of the conventional deodorizing filter in Embodiment 1 of this invention and the deodorizing filter of this invention. It is a figure which shows the relationship between the activated carbon mixing ratio and acetaldehyde re-release rate in Embodiment 1 of this invention. It is a figure which shows the relationship between the load of the deodorizer in Embodiment 1 of this invention, and the amount of powder falling. It is the figure which compared the acetaldehyde removal performance of the honeycomb-shaped deodorizing filter in Embodiment 1 of this invention, and the deodorizing filter of this invention. It is side surface sectional drawing which shows Embodiment 1 of the air purifying apparatus to which the deodorizing filter of this invention is applied. It is sectional drawing which shows the structure of the air purifying apparatus in Embodiment 2 of this invention. It is sectional drawing which shows the structure of the air purifying apparatus in Embodiment 3 of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Activated carbon, 2 Manganese oxide, 3 Zeolites, 4 Fibers, 5 Filter frame, 6 Air purifier, 7 Air inlet, 8 Dust collection filter, 9 Deodorizing filter, 10 Blower, 11 Air outlet, 12 Air direction, 13 Vaporization element , 14 water storage tanks, 15 water storage trays.

Claims (7)

For a filter having a random network structure composed of fibers having a fiber diameter of 5 to 30 μm and a basis weight of 40 to 400 g / m ² ,
A manganese oxide having a pore volume of 0.2 to 0.4 cc / g, a specific surface area of BET nitrogen adsorption of 100 to 150 m ² / g, and an average pore diameter of 50 to 100 angstroms;
The molar ratio of SiO ₂ to Al ₂ O ₃ is 40 or more and 500 or less, and is an ammonium ion substitution type, Na metal substitution type, Fe metal substitution type, or Cu metal substitution type, and MFI type. Zeolite that is beta or mordenite,
A deodorizer containing activated carbon having pores larger than the pore diameter of the zeolite in a weight ratio of 47:10:23 is supported in a total amount of the three components of 100 to 900 g / m ^2. Deodorizing filter characterized by. A frame surrounding the filter;
Volume (hereinafter, referred to as filter volume) in the frame of the Vcm ^3, when the filter deodorization rate was eta (%), acetaldehyde is if come main component odor was, acetate, the rejection for 3 Odor ammonia When measuring and calculating the deodorization rate η based on equation (1), equation (2) holds:
The deodorization filter according to claim 1, wherein a pressure loss is 35 Pa or less and a filter volume is 600 cm ³ or less when a wind speed of air passing through the frame is 1 m / s.
η = {(acetic acid removal rate) + (ammonia removal rate) + (acetaldehyde removal rate) × 2} / 4 (1)
η ≧ 0.15 × V (2) The deodorizing filter according to claim 1, wherein the fiber is made of any one of silicon oxide, transition metal, an inorganic material mainly composed of carbon, or a polymer organic material. The deodorizing filter according to claim 1, wherein the deodorizing filter is for an air purifier having a humidifying function. The deodorizing filter according to any one of claims 1 to 4 ,
A dust collection filter that captures at least one of pollen, dust, and dust particles;
An air cleaning device comprising: a fan that sucks air and exhausts the air to the outside. A water storage tank,
A tray for storing water in this water storage tank,
A vaporizing element that retains water stored in the tray and vaporizes the retained water by the air sucked by the fan, and
The air purifier according to claim 5 , wherein the vaporizing element is disposed at a subsequent stage of the deodorizing filter. A water storage tank,
A water storage tray that receives and stores water from the water storage tank;
A vaporizing element that retains water stored in the tray and vaporizes the retained water by the air sucked by the fan, and
The air purifier according to claim 5 , wherein the vaporizing element is disposed between the dust collection filter and the deodorizing filter, and sprays humidified air onto the deodorizing filter.

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