JP2002349917A - Air cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a regenerative air cleaner which is superior in deodorization effect, and can remove odor components of low concentration. SOLUTION: In the air cleaner comprising a rotating deodorizing rotor, an air-cleaning part for cleaning air by ventilating the rotor, and a regenerating part for regenerating the deodorizing property of the rotor, an air inlet is provided in a part of the air-cleaning part located on the side, where the rotor enters the regenerating part. An outlet is provided to a part of the air-cleaning part, where the rotor leaves the regenerating part; thus air flow is directed in the air-cleaning part ; and the air-cleaning part is partitioned preferably with partition sheets, so that the air ventilates the rotor preferably at least twice, particularly preferably three times.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a regenerative air purifier having an excellent deodorizing effect.

[0002]

2. Description of the Related Art The components of malodor such as food odor, tobacco odor, pet odor, and toilet odor are various, and typical ones are ammonia, amines, nitrogen compounds such as indole and skatole, hydrogen sulfide, There are sulfur compounds such as methyl mercaptan, methyl sulfide, methyl disulfide and dimethyl disulfide, aldehydes such as formaldehyde and acetaldehyde, ketones such as acetone, and alcohols such as methanol and ethanol.

[0003] Conventionally, when such a bad odor is generated indoors, there is a method of removing the odor outside the room, and it is possible to effectively remove the odor. Air is exchanged with outside air, and re-air conditioning is required, which causes a problem of loss of air conditioning energy.

[0004] Therefore, an air purifying apparatus has been developed in which the odor in the room is concentrated by the adsorbing action of the adsorbent, then the adsorbent is heated and regenerated, and the odor component desorbed by heating is exhausted to the outside. In addition, a sufficient deodorizing effect can be obtained by ventilation with a small air volume.

As an apparatus for continuously performing deodorization by concentration of odor and regeneration by ventilation of a small air volume, a rotary adsorption type deodorization rotor, an air purifier for passing air to be purified through the deodorization rotor, and deodorization of the deodorization rotor. Air purification device consisting of a regeneration unit that regenerates the properties using means such as heating,
For example, it is disclosed in JP-A-6-226037.

In such an air purifying apparatus, it is preferable to further enhance the deodorizing property and to minimize the amount of ventilation that causes a change in temperature and humidity. Was sought.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to provide a regenerative air purifying apparatus which can remove odor components having a low concentration and has an excellent deodorizing effect.

[0008]

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 air purifying apparatus comprising a rotary type deodorizing rotor, an air purifying unit for ventilating the deodorizing rotor to purify air, and a regenerating unit for regenerating the deodorizing property of the deodorizing rotor. An air inlet is provided in a part of the air purifier located on the side where the rotary deodorizing rotor enters the regenerating unit, and an exhaust port is provided in a part of the air purifier located on the side where the rotary deodorizing rotor exits the regenerating unit. An air purifying apparatus characterized in that the air purifying section directs the flow of air in the air purifying section.

(2) In the above invention (1), the air purifying device is characterized in that the inside of the air purifying section is partitioned so that the number of times that air passes through the deodorizing rotor is two or more times.

(3) The air purifying apparatus according to the above invention (2), wherein the number of times that air passes through the deodorizing rotor in the air purifying section is three times.

(4) The air cleaning apparatus according to the invention (2) or (3), wherein a partition for adjusting the number of times the deodorizing rotor is ventilated is formed by a partition plate.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The air purifying apparatus of the present invention and the elemental technology constituting the same will be described in detail below with reference to the drawings, and then the air purifying apparatus of the present invention will be described by way of examples.

As shown in FIG. 1, the air purifying apparatus of the present invention comprises a rotary type deodorizing rotor 1, an air purifier 5 for ventilating the deodorizing rotor to purify air, and regenerating the deodorizing properties of the deodorizing rotor. The rotary deodorizing rotor 1 is provided with a suction port 7 in a part of an air purifying section located on the side where the rotary deodorizing rotor 1 enters the reproducing section 6. A structure in which an exhaust port 8 is provided in a part of the air purifier located on the exit side of the air purifier directs the flow of air in the air purifier.

In the air purifying apparatus of the present invention illustrated in FIG. 1, a rotary deodorizing rotor 1 is housed in a housing 2, and a motor 3 is provided as a driving means for rotating the deodorizing rotor. The cleaning section 5 and the regenerating section 6 are separated by a partition plate 4a.
A heating device 9 is provided as a regenerating unit in the regenerating unit 6. However, the air purifying device of the present invention is not particularly limited to this. it can.

The deodorizing rotor according to the present invention is capable of collecting odor components mainly by an adsorbing action, and the collected odor components are removed by an example means described later to regenerate the deodorizing properties. The filter is a possible filter. Generally, a disk-shaped filter suitable for rotation and a honeycomb structure deodorizing filter for obtaining air permeability are used.

The means for rotating the deodorizing rotor according to the present invention is not particularly limited, but a method using a motor as a driving means is generally used. Although the main shaft of the deodorizing rotor may be directly connected to the motor or connected to the motor via a reduction gear, the driving may be transmitted from the outer peripheral portion of the deodorizing rotor via a belt or a gear.

The rotation of the deodorizing rotor according to the present invention may be continuous or may be intermittent rotation using a stepping motor or the like. The rotation speed may be constant or variable.For example, the rotation speed may be measured or estimated while measuring the degree of contamination of the air to be purified or the amount of odor adsorbed by the deodorizing rotor in the regeneration unit or the progress of regeneration. For example, the degree of rotation can be controlled.

The air purifying section according to the present invention is a portion through which air to be cleaned passes through the deodorizing rotor, has an intake port and an exhaust port, and more generally has a blowing means described later. In the present invention, an intake port is provided in a part of an air purifying section located on a side where the rotary deodorizing rotor enters the regenerating section,
An exhaust port is provided in a part of the air purifier located on the side where the rotary deodorizing rotor exits the regenerating unit to direct the flow of air in the air purifier. Is basically opposite to the rotation direction of the deodorizing rotor. By adjusting the flow of air in the air purifier in this way, the air purifier of the present invention can remove odor components to a dilute concentration,
Excellent deodorizing effect can be obtained.

The positional relationship between the intake port and the exhaust port provided in the air purifying section is relative, and an intake port is provided downstream and an exhaust port is provided upstream with respect to the rotation direction of the deodorizing rotor. In order to maximize the use of the space in the clean part and obtain a high deodorizing effect, the intake port should be installed immediately before the deodorizing rotor enters the regeneration section, and the exhaust port should be installed immediately after the deodorization rotor exits the regeneration section. Is preferred.

The air purifying apparatus of the present invention is divided into an air purifying section and a regenerating section, and is generally surrounded by a casing or a partition plate attached to the casing. Substantial compartments can be achieved by airflow such as air curtains.

When the compartment is defined by using a casing or a partition plate, a gap may be formed between the deodorizing rotor, which is a movable part, and the casing, and air may leak out. A skirt-like member made of a flexible material such as cloth or cloth to contact the deodorizing rotor to increase airtightness, or increase the air pressure of the air purifying section relatively to the regenerating section to prevent odor backflow And the like.

In the air cleaning section according to the present invention, the air to be cleaned may be merely passed so as to touch the surface of the deodorizing rotor. It is customary to vent the air to be blown through the deodorizing rotor.

The number of times of ventilation to the deodorizing rotor according to the present invention is not particularly limited. However, the more the number of times of ventilation to the deodorizing rotor, the higher the deodorizing property against low-concentration odors. Preferably, ventilation is performed three times.

When the number of times of ventilation of the deodorizing rotor exceeds three, although it depends on the composition and odor component of the deodorizing rotor, generally, the substantial deodorizing effect is saturated, and the significance of increasing the number of times of ventilation is diminished. In addition, there is a problem that the structure of the apparatus becomes complicated, or the area of the deodorizing rotor per ventilation is reduced, so that a large amount of wind is required for ventilation.

FIGS. 2 to 5 show principle diagrams for explaining the number of ventilations of the deodorizing rotor when the cross section is developed parallel to the rotation axis of the deodorizing rotor in the air purifying section according to the present invention.
As a specific means for setting the number of ventilation times of the deodorizing rotor to two, as shown in FIG. 3, one partition 4b is provided in the air cleaning unit to adjust the flow of air. As a specific means for setting the number of ventilation times of the deodorizing rotor to three, as shown in FIG. 4, two partitions 4b are provided in the air cleaning unit to adjust the flow of air. As a specific means for setting the number of ventilation times of the deodorizing rotor to four, three partitions 4b are provided in the air purifying section as shown in FIG. 5 to adjust the flow of air.

In the air cleaning section according to the present invention, when the number of ventilations of the deodorizing rotor is two, the area of the deodorizing rotor which is ventilated each time may be constant, or may be changed as necessary. Is also good. When the ventilation area increases as the leeward side, that is, as the number of times of ventilation increases, the deodorizing property against low-concentration odor generally improves further, but the processing air volume decreases. On the other hand, when the ventilation area decreases as the leeward side, that is, as the number of ventilation increases, the amount of air that can be processed increases, but the deodorizing property is sacrificed.In the present invention, the ventilation area decreases extremely as the leeward side decreases. It is not preferable to do so. As a whole, it is preferable that the ventilation area of each time is constant.

The regenerating part according to the present invention is a part having a regenerating means for regenerating the deodorizing property of the deodorizing rotor, and the regenerating means is not particularly limited. As an example of the regenerating means, there is a method of desorbing the adsorbed odor substance by passing heated air or heating the deodorizing rotor itself, and is generally widely used. In the heating regeneration, since the temperature of the deodorizing rotor rises and the deodorizing property immediately after shifting to the air purifying section decreases, an air cooling section may be provided between the regenerating section and the air purifying section. In the present invention in which low-concentration odors are removed at a nearby location, air cooling of the deodorizing rotor after heating and regeneration is particularly useful. In addition, since the regenerating part by heating and the air-cooling part attached to the regenerating part may share air blowing or the like, in the present invention, both are collectively described as a regenerating part.

In addition to heat regeneration, regeneration means such as washing regeneration and drying, or heat treatment and reattachment of chemicals may be used, which can be employed when the apparatus becomes somewhat large.

As one of the regenerating means, there is a method of irradiating excitation light to a deodorizing rotor carrying a photocatalyst in combination to decompose and remove the odor by the action of the photocatalyst.

The air purifying section or the regenerating section according to the present invention may be ventilated as required, and the means for blowing air is not particularly limited, but may be a sirocco type, an axial type, a propeller type, or the like.
Turbo-type, radial-type, cross-flow type, etc., using a fan such as a fan motor, natural wind or air generated by an exhaust fan such as a ventilation fan or air conditioner, etc., method using thermal convection, passenger car For example, a method utilizing an air current generated by the movement of the vehicle.

The deodorizing rotor according to the present invention preferably has a honeycomb structure. The honeycomb is a structure composed of cell walls having openings, and as a specific example, JIS-Z
Corrugated honeycomb formed by laminating single-sided cardboard manufactured in accordance with “Exterior Corrugated Cardboard” described in -1516, hexagonal honeycomb composed of hexagonal cells, honeycomb composed of square cells, honeycomb composed of triangular cells, and hollow cylinder And a honeycomb formed by gathering shape cells. 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.

As a method of manufacturing the honeycomb-shaped deodorizing rotor according to the present invention, a method of manufacturing by molding, a method of manufacturing by cutting a honeycomb into a disk shape by a method such as die-cutting, and a method of manufacturing a single-sided corrugated cardboard in a spiral shape. And the like. Alternatively, a cylinder may be prepared once in the same manner as described above, and then cut to form a rotor.

The deodorizing agent used in the deodorizing rotor according to the present invention is a chemical used mainly for the purpose of removing offensive odor, and includes adsorbents and deodorants, but adsorbents are mainly used. Above all, those which mainly use physical adsorption for the main odorous substances of interest are preferable, and have an advantage of excellent reproducibility.

The adsorbents used in the present invention include activated carbon, impregnated activated carbon, activated carbon fiber, charcoal such as charcoal and bamboo charcoal, natural and synthetic zeolites, activated alumina, activated clay, sepiolite, and iron-based compounds such as iron oxide. , Zinc oxide, magnesium oxide, silica, silica-zinc oxide composite, silica-alumina-zinc oxide composite, composite phyllosilicate, ion exchange resin, or a mixture thereof.

The adsorbent used in the present invention is not particularly limited, but is preferably activated carbon or high silica zeolite.

The activated carbon used in the present invention is a porous carbon material obtained by subjecting a carbon material to an activation treatment. Examples of the activation method include a steam activation method and a chemical activation method using zinc chloride or the like.

The carbon material used as the raw material of the activated carbon is a substance obtained by carbonizing an organic substance by heating at a high temperature. Most of the composition is carbon, but it may contain a few percent of hydrogen and oxygen. And ash (inorganic substances). The organic material used as the raw material of the carbon material is not particularly limited, but is a plant-derived material such as wood, bamboo, coconut shell or cotton or hemp, a cellulose material such as pulp or rayon, a pitch, a phenol resin, a polyacrylonitrile, or the like. Acrylic resin, polyolefin resin, polyester resin, polyamide resin and polycarbonate resin, and the like.Also, the carbon material may be coal,
Among them, coconut shell charcoal, which is inexpensive and excellent in gas adsorption, is advantageously used.

The activated carbon used in the present invention may be subjected to processing such as impregnation, if desired, without departing from the spirit of the present invention. As a substance to be impregnated, an acidic substance such as phosphoric acid, a basic substance such as potassium hydroxide,
Examples include oxidizing agents such as iodic acid, metals such as silver, and catalysts such as manganese dioxide and titanium oxide, depending on the odor targeted by the air purifier of the present invention and the method for regenerating the deodorizing rotor used in the present invention. Can be selected appropriately.

The high-silica zeolite used in the present invention is chemically a crystal of an aluminosilicate metal salt like a normal zeolite. In particular, the ratio of silica to alumina in the crystal is high, and oxygen atoms in the silica structure are reduced. Has almost no basicity.

Such a high silica zeolite does not participate in the formation of hydrogen bonds due to the Si—O—Si bond on the surface, exhibits hydrophobicity and does not adsorb water molecules. It is also possible to efficiently adsorb aldehydes. Therefore, the high silica zeolite is sometimes called a hydrophobic zeolite.

In addition, high silica zeolites include a wide range of odorous substances including aldehydes, for example, organic acids,
Ammonia, amines, ketones, sulfur-containing compounds such as hydrogen sulfide and mercaptans, and indoles can be adsorbed, so that they are particularly preferable as the deodorant according to the present invention.

In addition to the above adsorbents, the deodorizers used in the present invention include enzymatic deodorants such as iron ascorbic acid, metal phthalocyanine derivatives such as iron, cobalt and manganese, manganese oxides and perovskite catalysts. Low-temperature oxidation catalysts, photocatalysts described below, silicon carbide, silicon nitride, calcium silicate, alumina-silica, zirconia-based synthetic ceramics, maltite, far-infrared ceramics such as felsongite, compounds contained in plant extraction components Certain catechins, tannins, deodorants using flavonoids and the like can also be mentioned, and can be used without departing from the gist of the present invention. The adsorbent and these deodorants may be used as a composite hybrid deodorant.

The photocatalyst which can be used for regeneration of the deodorizing rotor according to the present invention is 0.5 to 5 eV, preferably 1 to 4 eV.
A photoreactive semiconductor with a bandgap of eV and capable of producing a photocatalytic reaction. A material that exhibits functions such as deodorization, antibacterial, antiviral, antifungal, antifouling, and decomposition of harmful substances when irradiated with excitation light. It is. In particular, its antibacterial properties are excellent, it not only suppresses the growth of bacteria, but also decomposes toxins generated when bacteria die, detoxifying them, and also decomposes dead bacteria, so its effect is It is said that it does not deteriorate in a short period of time unlike conventional inorganic antibacterial agents and is permanent.

The photocatalyst used in the present invention includes metal oxide particles such as zinc oxide, tungsten oxide, titanium oxide, and cerium oxide. Among them, titanium oxide is most suitable for use in a living space because of its structural stability, ability to remove photoreactive harmful substances, safety in handling, etc., and is advantageously used as a photocatalyst in the present invention.

Although the air purifying apparatus of the present invention can be used alone, it may be used by incorporating it into various air conditioners.

[0047]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, an air purifying apparatus according to an embodiment of the present invention comprises a honeycomb-shaped deodorizing rotor 1, a housing 2 for housing the deodorizing rotor, a motor 3 for rotating the deodorizing rotor, And an air purifying unit 5 and a regenerating unit 6 partitioned by a partition plate 4a, an intake port 7 for taking in air to be purified into the air purifying unit, an exhaust port 8 for discharging purified air, Heating device 9 installed in the regeneration unit,
It is composed of a regeneration section intake port 10 and a regeneration section exhaust port 11.

FIG. 1 shows an example in which two partition plates 4b are provided in the air cleaning section 5 and the number of ventilations of the deodorizing rotor is set to three times.
Is closed and the intake port 7a is used (as a diagram for directing the flow of air, which corresponds to the principle diagram of FIG. 4).

The honeycomb-shaped deodorizing rotor 1 is made of high silica zeolite as a deodorizing agent, poly-p-phenylene terephthalamide fiber as a main fiber, and fine fibers obtained by fibrillating poly-p-phenylene terephthalamide fiber as a reinforcing fiber. This is a honeycomb molded article obtained by producing a single-sided corrugated cardboard using a deodorized sheet obtained by wet-making the aqueous dispersion and then processing the single-sided corrugated cardboard into a spiral shape.

The rotation direction of the deodorizing rotor 1 is counterclockwise in the front view (a) of FIG. 1, and the flow of air in the air purifying section is such that the rotary deodorizing rotor enters the regenerating section. Air inlet 7a provided in a part of the air purifier located at
Alternatively, from b, the rotary type deodorizing rotor is guided to an exhaust port 8 provided in a part of an air purifying section located on the side exiting the regenerating section.

[0052] The air purifier 5 is provided with a partition plate 4 so that the air to be cleaned can be changed in the number of times the deodorizing rotor is ventilated.
b can be attached. The partition plate 4a shown in FIG. 1 partitions the air purifying unit 5 and the regenerating unit 6.

The regenerating section 6 is adjacent to the heating device 9 (FIG. 1).
In this case, an air cooling unit is provided above the heating device 9), and the air is cooled before the deodorizing rotor moves to the air cleaning unit. The amount of ventilation to the heating device can be adjusted by distributing the air flow by providing a baffle plate or the like in the air cooling unit.

In the air purifying apparatus of the present invention shown in FIG. 1, there are two intake ports 7, which are divided into air purifying sections in accordance with the number of times air to be cleaned passes through the deodorizing rotor. Only one is used depending on the number. 2 and 4
When the number of times of ventilation of the deodorizing rotor is an odd number of times as illustrated in FIG. 1, the intake port 7a described in FIG. 1 is used, and the number of times of ventilation of the deodorizing rotor is an even number of times as illustrated in FIGS. In this case, the intake port 7b shown in FIG. 1 is used.

Reference Example The deodorizing performance was tested using the air purifying apparatus of the present invention and an air purifying apparatus other than the present invention.

In FIG. 1, a case where a partition plate is not provided in the air purifying unit and the number of ventilations of the deodorizing rotor is one (corresponding to FIG. 2) is referred to as an air purifying apparatus A, and one partition plate is provided in the air purifying unit.
When the number of ventilations of the deodorizing rotor is two (corresponding to FIG. 3), the air purifying device B is used.
In the case where three sheets are provided and the number of ventilations of the deodorizing rotor is three times (corresponding to FIG. 4), the air purifying apparatus C is used, and three partition plates are provided in the air cleaning part and the number of times of ventilation of the deodorizing rotor is four times (see FIG. 5) was designated as an air purifier D.

In the air cleaning apparatus C (FIG. 1), the intake port 7a and the exhaust port 8 are exchanged, and the air is sucked in from the hole 8 and exhausted from the hole 7a. The case where the flow is guided from a part of the air purifier located on the side where the rotary deodorizing rotor exits the regeneration unit to a part of the air purifier located on the side where the rotary deodorant rotor enters the regeneration unit. An air cleaning device E of a comparative reference example was used.

A deodorizing test was carried out using the air purifying devices A to D of the present invention and the air purifying device E other than the present invention in the following procedure, and the results are shown in Table 1.

[Deodorizing Test] With respect to each air purifying apparatus (FIG. 1) of the reference example, a motor for connecting a fan motor to the exhaust port, continuously injecting acetaldehyde gas having a concentration of 10 ppm from the intake port, and rotating the deodorizing rotor. 3 and the heating unit 9 were operated under predetermined conditions, and a duct was connected to each of the regeneration unit intake port 10 and the regeneration unit exhaust port 11 for ventilation. After operating the air purifier for 30 minutes according to this procedure, the air at the exhaust port is collected in an odor bag, and the odor is reduced to 6.
The evaluation was made by a graded odor intensity display method. The number of measurers was five, and the degree of odor was 0 = odorless, 1 = odor that could be barely perceived, 2 = weak odor to know what odor was, 3
= Smell that can be easily perceived, 4 = Strong smell, and 5 = Strong smell were determined and digitized in six steps, and the average value of five measurers was obtained.

[0060]

[Table 1] The smaller the numerical value, the better the deodorizing property.

From the results shown in Table 1, it can be seen that the air purifying apparatus of the present invention has excellent deodorizing properties. In particular, the air purifying device B of the reference example in which the number of ventilations of the deodorizing rotor is 2 or more,
C and D have higher deodorizing properties, and there is no difference in the deodorizing performance between the case where the number of ventilations of the deodorizing rotor is 3 times (air cleaning device C) and 4 times (air cleaning device D). It is sufficient that the number of times of the ventilation of the rotor is three times, and it is understood that the number of times of the ventilation is optimal three times in consideration of the apparatus structure and the blowing power required for the ventilation of the air cleaning section.

[0062]

According to the present invention, it is possible to obtain a regenerative air purifying apparatus which can remove odor components having a low concentration and has an excellent deodorizing effect. Above all, according to the third invention of the present invention, an air purifying device which is particularly excellent in deodorizing property for low-concentration odor can be obtained.

[Brief description of the drawings]

FIG. 1 is a front view (a), a cross-sectional view taken along line AA (b), and a rear view (c) showing an embodiment of the air cleaning device of the present invention.

FIG. 2 is a principle diagram illustrating a structure of a housing in a case where the number of ventilations of a deodorizing rotor is one in an air cleaning unit according to the present invention.

FIG. 3 is a principle diagram illustrating a structure of a housing in a case where the number of ventilations of a deodorizing rotor is two in an air cleaning unit provided with one partition plate 4b according to the present invention.

FIG. 4 is a principle diagram illustrating a structure of a housing in a case where the number of ventilations of a deodorizing rotor is three in an air cleaning unit provided with two partition plates 4b according to the present invention.

FIG. 5 is a principle diagram for explaining a structure of a housing in a case where the number of ventilations of a deodorizing rotor is four in an air cleaning unit provided with three partition plates 4b according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Honeycomb-shaped deodorizing rotor 2 Housing 3 Motor 4a Divider which partitions the inside of an air purifier in order to adjust the number of times of ventilation of a deodorant rotor 4b Divider which partitions an air purifier and a regeneration unit 5 Air purifier 6 Regeneration unit 7a Mouth 7b Intake port 8 Exhaust port 9 Heating device 10 Reproduction section intake port 11 Reproduction section exhaust port

Claims (4)

[Claims] 1. An air purifying apparatus comprising: a rotary type deodorizing rotor; an air purifying section for ventilating the deodorizing rotor to purify air; and a regenerating section for regenerating the deodorizing property of the deodorizing rotor. An air inlet is provided in a part of the air purifier located on the side where the deodorizing rotor enters the regeneration unit, and an exhaust port is provided in a part of the air purifier located on the side where the rotary deodorizing rotor exits the regeneration unit. An air purifying device, wherein the air purifying unit directs the flow of air in the air purifying unit. 2. The air purifying apparatus according to claim 1, wherein the air purifying section is partitioned so that the number of times that air flows through the deodorizing rotor in the air purifying section is two or more times. . 3. The air purifying apparatus according to claim 2, wherein air is passed through the deodorizing rotor three times in the air purifying section. 4. The air purifying apparatus according to claim 2, wherein a section for adjusting the number of times the deodorizing rotor is ventilated is formed by a partition plate.