JP5310791B2 - Air purifier - Google Patents

Description

  The present invention relates to an air cleaning device having a deodorizing filter for removing odors in the air.

  As a conventional air purifying apparatus, a chamber having an air passage through which air passes and a housing for housing a filter, an ozone generator, a first ozonolysis filter for oxidizing and removing carbon monoxide, and alcohol with activated carbon. An adsorbing filter that adsorbs, a second ozonolysis filter that oxidizes and removes ammonia, an aroma filter that emits aroma, a drive mechanism that moves these filters between the chamber housing and the air passage, A control panel for controlling the drive mechanism, and the control panel controls the drive mechanism in accordance with the filter usage pattern for each time zone stored in the memory, so that a specific filter is placed in the air passage in a specific time zone. There is something to be positioned.

JP-A-10-85533 (0019, FIG. 1, FIG. 3)

  Conventional air purifiers have switched by time control as a method of automatically switching filters corresponding to a plurality of odors, but in the method of switching by time control, for example, when a new odor suddenly occurs There is a problem that the responsiveness of filter switching is low and the response to multiple odors is not sufficient.

  In order to solve the above-described problems, the present invention provides an air cleaning device that has a high filter switching response and can efficiently deodorize a plurality of odors.

  An air cleaning device according to the present invention has a suction section and a blow-out section, a ventilation path through which air passes, an odor sensor provided in the ventilation path and detecting odor contained in the air passing through the ventilation path, and an odor A deodorizing filter provided on the downstream side of the sensor and configured to be arranged in a direction orthogonal to the ventilation direction of the ventilation passage of a plurality of types of catalysts for decomposing odors, and a deodorization comprising a catalyst corresponding to the odor detected by the odor sensor Driving means for driving a part of the filter to be exposed in the air passage.

  According to the air cleaning device of the present invention, the catalyst corresponding to the type of odor detected by the odor sensor is exposed on the air passage, so that the responsiveness of the filter switching is high and a plurality of odors can be efficiently deodorized. it can.

It is a schematic sectional drawing of the air purifying apparatus which concerns on Embodiment 1 of this invention. It is a perspective view of the deodorizing filter which concerns on Embodiment 1 of this invention. It is a schematic diagram of the deodorizing filter which concerns on Embodiment 1 of this invention. It is a graph which shows the relationship between the elapsed time of the deodorizing filter which concerns on Embodiment 1 of this invention, and an odor residual rate. It is a graph which shows the relationship between the elapsed time of the deodorizing filter which concerns on Embodiment 1 of this invention, and an odor residual rate. It is a schematic sectional drawing of the heating means which concerns on Embodiment 1 of this invention. It is a structure perspective view of the heating means which concerns on Embodiment 1 of this invention. It is a graph which shows the effect which heat-regenerated the deodorizing filter concerning Embodiment 1 of the present invention. It is a schematic diagram of the up-and-down drive of the ultraviolet lamp concerning Embodiment 1 of this invention.

Embodiment 1 FIG.
Hereinafter, an air cleaning device according to an embodiment of the present invention will be described with reference to FIGS.

FIG. 1 is a schematic cross-sectional view of an air cleaning device according to Embodiment 1 of the present invention.
In FIG. 1, the air cleaning device includes a suction part 9 and a blowing part 10, a ventilation path 11 through which air passes, and a movable suction part opening and closing for opening and closing the suction part 9 and the blowing part 10. A plate 1 and an outlet opening / closing plate 8 are provided. In the ventilation path 11, a suction fan 7 for taking in air from the outside of the air purifier, an ultraviolet ray generating lamp 2 for generating ultraviolet rays, a dust collecting filter 3 for collecting particulate matter in the air, and an odor for detecting odors. Sensor 51, ozone generating element 4 as ozone generating means, deodorizing filter 5 configured to be rotatable, driving means (not shown) provided in the air purifier for rotating the deodorizing filter 5 on the rotating shaft 50, driving means In order to drive, etc., a control means (not shown) provided in the air purifier, a heating means 6 for heating the deodorizing filter 5, and an ozone concentration sensor 41 for detecting the concentration of ozone generated by the ozone generating element 4 are provided. .

  The dust collection filter 3 uses, for example, a fine mesh HEPA filter (High Efficiency Particulate Air Filter), and 99.97% or more of particles having a particle diameter of 0.3 μm can be collected. However, dust clogged on the filter surface is a hotbed of bacteria and viruses, and it is necessary to perform sterilization and antiviral treatment.

  The ultraviolet ray generation lamp 2 uses, for example, a low-pressure mercury lamp that generates a wavelength of 253.7 nm, and aims to cause a chemical reaction to cellular DNA by ultraviolet rays and kill bacteria and viruses. Ultraviolet rays refer to electromagnetic waves having a wavelength of 10 to 400 nm. The ultraviolet rays generally referred to are UV-A (315-400 nm), UV-B (280-315 nm), and UV-C (280 or less) contained in sunlight. The shorter the wavelength, the higher the energy and the higher the sterilization / reactivity, but the wavelength with a strong sterilization action is 253.7 nm. The wavelength of the ultraviolet ray generating lamp 2 may be a wavelength that can simultaneously generate ozone. In addition, since light acts directly on bacteria and viruses, it has no effect unless irradiated to bacteria and viruses. Therefore, it is preferable to install the ultraviolet ray generating lamp 2 in front of the dust collection filter 3.

  The ozone generating element 4 can obtain high-concentration ozone in a short time by performing high-pressure discharge capable of generating ozone with high efficiency, for example, silent discharge. Ozone is a powerful oxidant consisting of three oxygen atoms and is used in a wide range of fields for air purification and deodorization. Ozone can be easily generated by electric discharge, has strong oxidizing power after fluorine, and even if used excessively, it decomposes naturally into harmless oxygen. In addition, since ozone with a high concentration may cause an unpleasant odor or adverse effects on the human body, the use of ozone is limited to the internal cleaning of the air purifier.

FIG. 2 is a perspective view of the deodorizing filter 5.
The deodorizing filter 5 is provided on the downstream side of the odor sensor 51, and is configured to be provided in a direction orthogonal to the ventilation direction of a plurality of types of catalysts to be described later.
Odors in the living environment are generated, for example, from toilets, clogs, pets, smoking and the human body. In other words, these odors occur with human life. The odors can be broadly divided into nitrogen compounds containing ammonia and trimethylamine (N-based odors), sulfur compounds such as methyl mercaptan and hydrogen sulfide (S-based odors). And aldehyde / organic acid compounds such as acetaldehyde, acetic acid and butyric acid. These odors are odors having a low odor threshold in the living environment, that is, removal of these odors greatly affects the reduction in odor intensity. Therefore, the deodorizing filter 5 includes three types of filters specialized for the above-described three types of odor removal, that is, a nitrogen compound removing deodorizing filter 52, a sulfide removing deodorizing filter 53, and an aldehyde / organic acid removing deodorizing filter 54. .

  The nitrogen compound removal deodorization filter 52, the sulfide removal deodorization filter 53, and the aldehyde / organic acid removal deodorization filter 54 are, for example, activated carbon, zeolite, platinum, silver, palladium, iron, chromium, copper, manganese, and oxides thereof. It is created by changing the target catalyst type and blending ratio. The nitrogen compound removal deodorization filter 52, the sulfide removal deodorization filter 53, and the aldehyde / organic acid removal deodorization filter 54 are different from each other, but the pressure loss of the filters is the same in order to maintain a predetermined odor removal performance. Preferably there is.

FIG. 3 is a schematic diagram of the deodorizing filter 5.
The ratio of the types of odors detected in general households is approximately nitrogen compound: sulfur compound: aldehyde / organic acid compound = 1: 1: 2. This is because aldehydes and organic acid compounds such as cooking odors are often found in the living environment and there are many types. In other words, there are most opportunities to deodorize aldehyde / organic acid compounds. Therefore, as shown in FIG. 3, it is desirable that the deodorization filter 5 is also configured to have a larger area of the aldehyde / organic acid removal deodorization filter 54 than the nitrogen compound removal deodorization filter 52 and the sulfide removal deodorization filter 53. .

  Further, since the ozone generating element 2 is provided inside the air purifier, a metal catalyst such as manganese dioxide (MnO2), ferric oxide (Fe2O3), nickel oxide (NiO) or the like as a catalyst composition of the deodorizing filter 5 or Mix one or more types of activated carbon. By blending these catalysts and adsorbents, the deodorizing filter 5 not only plays a role of deodorization but also plays a role of ozonolysis.

Furthermore, the deodorizing filter 5 is formed in a disk shape, and is rotationally driven by a driving means that is driven by a signal from the control signal. The driving means is not limited as long as the deodorizing filter can be moved to an arbitrary position, and examples thereof include a method using a motor, a spring, a magnet, and the like. The shape of the deodorizing filter 5 may be polygonal as long as it can be freely rotated.

FIG. 4 is a graph showing the relationship between the elapsed time and the odor residual rate when the nitrogen compound is removed by the nitrogen compound removal deodorization filter 52 and the composite odor removal deodorization filter.
FIG. 5 is a graph showing the relationship between the elapsed time and the odor residual rate when odors other than nitrogen compounds are removed by the nitrogen compound removal deodorization filter 52 and the composite odor removal deodorization filter.
The nitrogen compound removal deodorizing filter 52 specialized for the removal of nitrogen compounds showed higher removal performance than the composite odor removal deodorizing filter corresponding to a plurality of types of odors in removing nitrogen compounds. However, when a non-nitrogen compound, for example, a sulfurized product, an aldehyde / organic acid compound, or the like is treated, the nitrogen compound removing deodorizing filter 52 specialized for removing the nitrogen compound has a type and a composition of a catalyst for removing odor. Since the ratio is selective, the removal performance is lower than the composite odor removal filter.

In view of the results of FIG. 4 and FIG. 5 and in the indoor environment where human beings live, nitrogen oxides such as ammonia and sulfurated substances such as hydrogen sulfide are often generated instantaneously. It can be seen that it is important to switch the deodorizing filter 5 appropriately according to the type of odor that occurs instantaneously. Therefore, the air purifier according to the present embodiment switches the deodorizing filter 5 according to the detection result of the odor sensor 51.

The odor sensor 51 can identify at least a nitrogen compound, a sulfur compound, and an aldehyde / organic acid compound from the odor in the air. When the odor sensor 51 detects and identifies the odor, the drive means rotates the deodorization filter 5 to expose the catalyst having a high removal action on the air passage 11 with respect to the odor detected by the odor sensor 51. Thereby, the deodorizing filter 5 can be switched appropriately also for the odor instantly generated.
In order to improve each discrimination performance, the odor sensor 51 may be constructed by IR sensors that are resistant to the above three types of odors, or as a set of odor sensors, deodorization is performed by a balance of odor concentrations detected by three semiconductor sensors. The rotation of the filter 5 may be determined.

FIG. 6 is a schematic cross-sectional view of the heating means 6 according to Embodiment 1 of the present invention.
As shown in FIG. 6, the heating means 6 is provided at the lower side of the deodorizing filter 5, that is, at a position where it does not interfere with the air flow sucked from the suction portion 9 as much as possible.

Next, the operation of the air cleaning device will be described.
When the air purifier enters the operating state by operating the operating means provided in the air purifier, the control means first opens and closes the suction part opening / closing plate 1 provided in the suction part 9 and the blower part 10 provided in the blower part 10. The plate 8 is opened, and the air outside the air cleaning device is sucked into the device by the suction fan 7. Particulate matter such as dust, bacteria and viruses contained in the sucked air is collected by the dust collection filter 3. Air containing odors that cannot be collected by the dust collection filter 3 flows downstream of the ventilation path 11 and reaches the odor sensor 51.

The odor contained in the air after passing through the dust collection filter 3 is detected by the odor sensor 51. The odor sensor 51 detects any of the three types of odors of nitrogen compounds, sulfur compounds, and aldehyde / organic acid compounds. Is identified. The control means drives the drive means based on the identification result of the odor sensor 5, and the drive means removes the deodorizing filter 5 so that a catalyst having a high removal performance with respect to the odor identified by the odor sensor 51 is exposed on the ventilation path 11. , And remove odorous components in the air with a odor-resistant catalyst.

  Here, when the odor sensor 51 detects a plurality of odors, the control means drives the drive means so as to change the ratio of each catalyst exposed on the ventilation path 11 according to the concentration of each odor detected by the odor sensor 51. . For example, when the odor sensor 51 detects a combined odor of a nitrogen compound and an aldehyde / organic acid compound in the passing air flow, the driving means rotates the deodorization filter 5 to rotate the nitrogen compound-specific deodorization filter 52 and the aldehyde / organic acid removal deodorization filter. 54 is exposed on the ventilation path 11. At this time, when the odor sensor 51 detects that the odor concentration of the aldehyde / organic acid compound is higher than that of the nitrogen compound, the drive means removes the aldehyde / organic acid removal deodorization filter from the nitrogen compound removal deodorization filter 52 with respect to the deodorization filter 5. It rotates so that it may expose on the ventilation path 11 so that the area of 54 may increase. In addition to the combination of the nitrogen compound removal deodorization filter 52 and the aldehyde / organic acid removal deodorization filter 54, the sulfur compound removal deodorization filter 53, the aldehyde / organic acid removal deodorization filter 54, the nitrogen compound removal deodorization filter 52, and the sulfur compound removal deodorization. Needless to say, a combination of the filter 53, the nitrogen compound removal deodorization filter 52, the sulfur compound removal deodorization filter 53 and the aldehyde / organic acid removal deodorization filter 54 is also possible.

  As a specific example of the combination of the catalysts for the odor described above, for example, since the toilet odor is a combined odor of a nitrogen compound and a sulfur compound, the odor is removed using a combination of the nitrogen compound removal deodorization filter 52 and the sulfur compound removal deodorization filter 53. In addition, the odor / organic acid removal deodorization filter 54 and the nitrogen compound removal deodorization filter 52 are exposed to the tobacco odor, and the cooking odor and body odor are almost aldehyde / organic acid compounds, so the aldehyde / organic acid removal deodorization filter 54 only. Since pet odors and kerosene contain a small amount of aldehyde / organic acid compounds, nitrogen compounds and sulfur compounds, sulfur compound removal / deodorization filter 52, sulfur compound removal / deodorization filter 53, and aldehyde / organic acid removal / deodorization filter 54 are combined. Expose and remove odor.

FIG. 7 is a configuration perspective view of the deodorizing filter 5 and the heating means 6 when viewed from the flow path direction.
As shown in FIG. 7, it arrange | positions so that the heating means 6 deodorizing filter 5 may be inserted | pinched. A heater 61 is attached to the heating means 6, and the heater 61 generates heat at 40 to 300 ° C. Further, since the aldehyde / organic acid removal deodorization filter 54 is frequently used and there are many odors that can be removed using only the aldehyde / organic acid removal deodorization filter 54, the area of the heating means 6 is as shown in FIG. It is substantially the same as the area of the aldehyde / organic acid removing deodorizing filter 54, that is, an area covering half of the deodorizing filter 5. In the case of an air purifier having a structure in which the remaining half of the deodorizing filter 5 not covered with the heating means 6 is exposed in the ventilation path 11, the aldehyde / organic acid removing deodorizing filter 54 occupies approximately half of the deodorizing filter 5. Although it is desirable to configure, the size of the heating means 6 is not limited to half that of the deodorizing filter 5, and accordingly, the size varies depending on the ratio and shape of the deodorizing filter 5 exposed on the ventilation path 11.

FIG. 8 is a graph showing the effect of heating and regenerating the deodorizing filter 5. The vertical axis represents the odor removal rate, and the horizontal axis represents the elapsed time.
While the deodorizing filter 5 removes odors contained in the air, the catalyst attached to the filter gradually deteriorates, and as a result, the removal performance of the filter drops to 10% of the initial removal performance. Therefore, when the deodorizing operation is performed for a certain period of time in order to remove the odorous component adhering to the surface of the deodorizing filter 5, the control means energizes the heating means 6. The heating means 6 heats the deodorizing filter 5, enhances the activation of the catalyst, and removes components that cannot be decomposed at room temperature with heat. Thereby, the removal performance of the deodorizing filter 5 is recovered to a point close to the initial performance, and the deodorizing filter 5 can maintain a high deodorizing performance for a longer period of time.

  After the operation of the air cleaning device is stopped, or the accumulated odor amount detected by the odor sensor 51 (odor concentration × operation time), or when the operation is continued for a predetermined time set in the air cleaning device in advance, or the user uses the operation means. When set, the air purifier automatically cleans the filters. The dust collection filter 3 is cleaned by ultraviolet irradiation, and the deodorizing filter 5 is cleaned by heating and ozone.

  When the cleaning is executed, first, the suction portion opening / closing plate 1 and the blowing portion opening / closing plate 8 are moved to close the suction portion 9 and the blowing portion 10 to seal the ventilation path 11. This is because intermediate products and incomplete oxides generated when the oxidation reaction of the odor functional group does not proceed sufficiently, such as acetaldehyde generated as an intermediate product in the process of decomposition to acetic acid and water in the oxidation reaction of ethanol to the outside. This is to prevent being discharged. In addition to the reasons described above, the ventilation path 11 is sealed because the light having a wavelength of 253.7 nm when irradiated with ultraviolet rays is harmful to the skin and eyes, so that the ultraviolet rays do not leak to the outside. In the case of using the ultraviolet ray generation lamp 2 that is generated at the same time, it is difficult to control the ozone concentration at the outlet of the air purifier and to prevent high concentration (50 ppb or more) ozone from leaking to the outside.

  In cleaning the dust collection filter 3, the ultraviolet ray generating lamp 2 sterilizes the surface of the dust collection filter 3 that hits the wind, that is, the surface upstream of the ventilation path 11 by irradiating ultraviolet rays. When the ultraviolet ray generation lamp 2 emits ultraviolet rays having a wavelength of 253.7 nm, the ultraviolet rays are absorbed by the nucleic acid (DNA) of the bacterial cell attached to the dust collecting filter 3 to cause a chemical change and damage the bacterial cell.

FIG. 9 is a schematic diagram of the vertical driving of the ultraviolet ray generating lamp 2.
The irradiation intensity of ultraviolet rays having a wavelength of 253.7 nm is proportional to the distance to the irradiation object. That is, in order to efficiently use ultraviolet rays and obtain the surface of the dust collecting filter 3 and a constant irradiation intensity, it is necessary to make the distance between the dust collecting filter 3 and the ultraviolet ray generating lamp 2 constant. Therefore, as shown in FIG. 9, the control means drives the lamp driving means (not shown) up and down so that the ultraviolet ray generating lamp 3 is at a constant distance from the surface of the dust collection filter 3, thereby uniformly covering the surface of the dust collection filter 3. Can be sterilized.

  Next, in cleaning the deodorizing filter 5, the odor is further decomposed by using ozone in addition to the heat regeneration by the heating means 6. First, the heating means 6 heats the portion of the deodorizing filter 5 where the deodorizing operation is performed at a constant load for a certain period of time at a temperature in the range of 40 to 300 ° C. to regenerate the catalyst. After performing the heat regeneration, the driving means rotates the deodorizing filter 5 and passes the heated portion of the deodorizing filter 5 onto the air passage. Thereafter, the ozone generating element 4 generates ozone and reacts with the deposits on the surface of the deodorizing filter 5. The reaction of ozone is further activated by heat, and the regeneration efficiency of the deodorizing filter 5 is increased. Further, the ozone that has not been consumed is decomposed by the ozone decomposition catalyst contained in the deodorizing filter 5. Moreover, since decomposition of ozone is promoted even at a high temperature, the ozone concentration can be reduced in a shorter time than usual.

  As described above, according to the present embodiment, the deodorizing filter 5 is a rotary type, and the driving means exposes the deodorizing filter 5 on the ventilation path 11 corresponding to the type of odor detected by the odor sensor 51. Since the deodorizing filter 5 is driven to the position, the response of switching the deodorizing filter 5 is high, and a plurality of odors and instantaneously generated odors can be efficiently deodorized.

  In addition, since the deodorizing filter 5 configured to be arranged in a direction orthogonal to the ventilation direction of the plurality of ventilation passages 11 is provided in the ventilation passage 11, compared to the case where a plurality of catalysts are provided in series on the ventilation passage. Less pressure loss. If the pressure loss is large, the suction fan 7 for sucking in air also becomes large, leading to an increase in the size of the entire device. Therefore, the air cleaning device can be downsized by reducing the pressure loss.

  Further, by rotating the deodorizing filter 5, the entire deodorizing filter 5 can be heated by the heating means 6 having a size smaller than that of the deodorizing filter 5. Thereby, since it is not necessary to enlarge the heating means 6, a small air cleaner can be provided.

  Moreover, since the deodorizing filter 5 can always be regenerated by making the deodorizing filter 5 rotary and heating a part of the deodorizing filter 5 with the heating means 6, it can be used continuously for a long time. It is possible to provide an air cleaning device that can maintain high deodorization performance for a long period of time.

  Further, the deodorizing filter 5 is configured such that the area of the aldehyde / organic acid removing deodorizing filter 54 is larger than that of the nitrogen compound removing deodorizing filter 52 and the sulfide removing deodorizing filter 53, so that the ratio of the odorous substances is the highest. It is possible to obtain a structure suitable for deodorization of aldehydes and organic acids having a large amount.

  Further, when the odor sensor 51 detects a plurality of odors, the control means drives the drive means to rotate the deodorization filter 5 in accordance with the ratio of the concentration of the plurality of odors detected by the odor sensor 51, thereby making it more efficient. Deodorization can be performed.

  Moreover, by providing the heating means 6 on both surfaces of the deodorizing filter 5, a high temperature can be obtained at a faster speed than single-side heating, and the heating regeneration time of the deodorizing filter 5 can be shortened.

  Further, since the heating means 6 is provided at a position where it does not interfere with the suction portion 9, that is, it does not become a resistance that blocks the ventilation path 11, an increase in the ventilation resistance can be suppressed, and the suction fan 7 for taking in air from outside can be suppressed. An increase in size can be prevented. Furthermore, it is possible to prevent the surface of the heater 61 from being contaminated with oil, dust, or the like and deteriorating performance.

  Further, when the surface of the dust collection filter 3 is sterilized by the ultraviolet ray generation lamp 2, the surface of the dust collection filter 2 can be sterilized evenly by driving the ultraviolet ray generation lamp 2 up and down by the lamp driving means.

  In addition, by decomposing the odor adhering to the deodorizing filter 5 with ozone, the ozone is decomposed by temperature and the reaction rate is increased, so that the odor adhering to the deodorizing filter 5 in a shorter time due to the synergistic effect of heat and ozone. Can be removed.

  Further, while the ozone generating element 4 is generating ozone, the control means closes the suction part 9 and the blowing part 10 so that the high-concentration ozone leaks and does not touch the human body. 11 can be closed. This is because high-concentration ozone is harmful to the human body. Moreover, since the reaction time sufficient for ozone to remove the odor in air | air can be ensured by closing the inside of the ventilation path 11, the odor adhering to the deodorizing filter 5 can be decomposed | disassembled more efficiently.

  In addition, since the odorous substance tends to become more irritating and strong as the low molecular weight, the driving means preferentially removes the low molecular weight compound when complex odor is contained in the air flowing through the air purifier. You may control rotation of the deodorizing filter 5 so that it may do. Thereby, since it deodorizes from a stimulating and strong smell, more efficient deodorization can be performed automatically.

  In addition, cigarette odor (ammonia, acetaldehyde, acetic acid, etc.), garbage odor (methyl mercaptan, trimethylamine), human body odor (nonenal), cooking odor (VOC), toilet odor (ammonia, sulfide) ) Etc. may be installed, and the control mode may be designated by operating means provided in the air purifier main body. Thereby, efficient deodorization can be performed more reliably.

  1 suction part opening and closing plate 2 ultraviolet ray generation lamp 3 dust collecting filter 4 ozone generating element 41 ozone concentration sensor 5 deodorization filter 50 rotating shaft 51 odor sensor 52 nitrogen compound removal deodorization filter 53 sulfur compound removal deodorization filter 54 aldehyde / organic acid removal deodorization filter 6 heating means 61 heater 7 suction fan 8 blowing part opening / closing plate 9 suction part 10 blowing part 11 ventilation path.

Claims (9)

A ventilation path having a suction part and a blowing part through which air passes;
An odor sensor that is provided in the ventilation path and detects an odor contained in the air passing through the ventilation path;
A deodorizing filter that is provided on the downstream side of the odor sensor, and is configured by horizontally arranging a plurality of types of catalysts for decomposing odor in a direction orthogonal to the ventilation direction of the ventilation path;
An air purifier comprising: drive means for driving so as to expose a part of the deodorizing filter including a catalyst corresponding to the odor detected by the odor sensor in the ventilation path.   The air purifier according to claim 1, wherein the driving unit rotates the deodorizing filter.   The air purifier according to claim 2, wherein a part of the deodorizing filter including at least two or more types of the plurality of types of catalysts is exposed in the ventilation path.   The said deodorizing filter is rotated according to the ratio of the density | concentration of the said multiple types of odor which the said odor sensor detected when the said odor sensor detected multiple types of odor. Air cleaning device.   The air purifier according to any one of claims 1 to 4, wherein the deodorizing filter is composed of a catalyst having high removal performance with respect to a nitrogen compound, a sulfur compound, and an aldehyde / organic acid compound.   The surface area of the catalyst having a high removal performance with respect to the aldehyde / organic acid compound constituting the catalyst filter is larger than the area of the catalyst having a high removal performance with respect to the nitrogen compound and the sulfurized substance constituting the deodorizing filter. The air purifier according to claim 5. Comprising heating means for heating the deodorizing filter;
The air purifier according to any one of claims 1 to 6, wherein the heating means is provided at a position that does not interfere with the ventilation direction of the ventilation path. Comprising ozone generating means for generating ozone upstream of the deodorizing filter;
The air purifier according to claim 7, wherein the deodorizing filter contains an ozonolysis catalyst. Each of the suction part and the blowing part can be opened and closed,
9. The air purifier according to claim 8, wherein both the suction part and the blowing part are closed at least while the ozone generating means is driven.

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