JPH0938460A - Air cleaning method for automobile and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air cleaning method for automobiles capable of removing the toxic components in the outdoor air and taking the air into the vehicle at the time of introducing the outdoor air into the vehicle. SOLUTION: The outdoor air is fed into a first column 30A packed with active carbon by a blower 14 and after NOx is adsorbed by the active carbon, the air is introduced into the vehicle room. The active carbon of a second column 30B on which the NOx is adsorbed by magnetron 44 is irradiated with microwaves, the NOx absorbed with the active carbon is converted to carbon dioxide and nitrogen and is desorbed from the active carbon. The NOx is adsorbed on the active carbon by again utilizing the second column 30B with which the desorption of the NOx is ended.

Description

Detailed Description of the Invention

[0001]

The present invention relates to relates to automotive air cleaning method and apparatus for purifying NO _X in the air fed to the vehicle.

[0002]

2. Description of the Related Art Conventionally, air purifiers for automobiles generally use an electric dust collecting system in which air inside the automobile is circulated by a fan and dirt is removed by a filter. This uses a filter material that is prone to being electrically charged with static electricity to adsorb foreign matter such as dust. In addition, an ion type air purifier equipped with a corona discharge mechanism at the part corresponding to the filter is incorporated in the vehicle air control unit.

Ion type air purifiers are prefilters,
It consists of an ionizer and a collector unit. Dirty air sent from the outside or inside of the vehicle by the blower fan is first cleaned of large dust by a pre-filter. The dust in the air is charged by an ionizer that performs high-pressure corona discharge, and the charged dust is collected by a collector to purify the air.

[0004]

The above-described vehicle-mounted air purifier has the ability to remove particles of cigarette smoke, dust, soot, etc. floating in the air, but other vehicles. It was not possible to remove toxic gases such as NO _x , CO, and HC emitted from the exhaust. Therefore, while traveling on a congested road or a road with a large amount of traffic, air containing toxic gas outside the vehicle is introduced into the vehicle as it is. Further, even in the internal air circulation, the CO ₂ concentration increases when the number of passengers is large.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to introduce outside air into a vehicle in order to control air composition components.
An object of the present invention is to provide an air cleaning method and device for an automobile, which can remove toxic components in the outside air and take them into a vehicle.

Further, according to the present invention, when the outside air is introduced into the vehicle, the air outside the vehicle can be purified by removing the toxic components in the outside air, taking it into the vehicle, and then releasing it outside the vehicle. A cleaning method and apparatus are provided.

[0007]

To achieve the above object, according to an aspect of, the automotive air cleaning method of claim 1, the air containing NO _X introduced into the motor vehicle, in contact with mainly of adsorbent carbon particles After adsorbing NO _x , the adsorbent is irradiated with microwaves to combine the NO _x with the carbon particles, convert them into carbon dioxide and nitrogen, and leave the adsorbent to remove the NO _{x. The} adsorbent that has left _X is NO
_The gist is to bring NO _X into contact with air containing _X to adsorb NO _X again.

In order to achieve the above-mentioned object, in the air purifying apparatus for an automobile according to claim 2, NO mainly composed of carbon particles is used.
A container filled with _X adsorbent, feeding air containing NO _X into the vessel, a blowing means for introducing air is adsorbed into the passenger compartment of the NO _X, the adsorption operation of the NO _X rows by said blowing means And irradiating the adsorbent of the container with microwaves to convert the NO _x adsorbed by the adsorbent into carbon dioxide and nitrogen, and separating the adsorbent from the adsorbent. To do.

In order to achieve the above-mentioned object, in the air purifying apparatus for an automobile according to claim 3, NO mainly composed of carbon particles is used.
A plurality of containers filled with _X adsorbent, to one or more of the containers, feeding air containing NO _X, and blowing means for introducing air adsorbed to the passenger compartment of the NO _X, NO _X by the blowing means Microwave irradiation for irradiating the adsorbent in the container in which the adsorption operation has been performed with microwaves to convert the NO _X adsorbed by the adsorbent into carbon dioxide and nitrogen, and desorb the NO _X from the adsorbent. Means for irradiating microwaves to the container 1 by the microwave irradiating means,
The gist is that the air can be continuously sent to the other container from which NO _X has been released by the air blowing means.

[0010]

According to the structure of claim 1, after the air containing NO _x is brought into contact with the adsorbent mainly composed of carbon particles to adsorb NO _x , the adsorbent is irradiated with microwaves to convert the NO _x into carbon particles. It is combined and converted into carbon dioxide and nitrogen, and is separated from the adsorbent. Therefore, the adsorbent was complete withdrawal of the NO _X, the NO _X in contact with air can be re-adsorbed.

By the blowing means, N mainly consisting of carbon particles
Air is sent to the container filled with the adsorbent of O _x , and NO _x
Is adsorbed and then introduced into the vehicle interior. Then, the microwave irradiating means irradiates the adsorbent in the container in which NO _x has been adsorbed with microwaves to convert the NO _x adsorbed by the adsorbent into carbon dioxide and nitrogen, and separates from the adsorbent. Therefore, NO _X can be adsorbed by reusing the container from which NO _X has been desorbed.

By the blowing means, N mainly consisting of carbon particles
Air is sent to the container filled with the adsorbent of O _x , and NO _x
Is adsorbed and then introduced into the vehicle interior. Then, the microwave irradiating means irradiates the adsorbent in the container in which NO _x has been adsorbed with microwaves to convert the NO _x adsorbed by the adsorbent into carbon dioxide and nitrogen, and separates from the adsorbent. Therefore, NO _X can be adsorbed by reusing the container from which NO _X has been desorbed. Here, using multiple containers,
Even when the one container is being irradiated with microwaves by the microwave irradiating means, air can be continuously sent to the other container from which NO _x has been released by the air blowing means, so that clean air is always introduced into the passenger compartment. You can continue to provide.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below with reference to the drawings. First, the principle of the present invention will be described with reference to FIGS. The present invention uses a carbon particle of porous activated carbon, gasoline, NO _X discharged from the internal combustion engine such as diesel, CO, adsorbing the harmful gases such as HC. Activated carbon is SO _X ＞ NO _X ＞
CO ₂ > CH ₄ >CO> N ₂ > H ₂ O are adsorbed in the order of
It is known that a small amount of acidic gas such as SO _X and NO _X oxidizes and is adsorbed as sulfuric acid and nitric acid. However, when activated carbon adsorbs a very small amount of NO _x , it becomes
_The ability to adsorb _X decreases, and it cannot withstand long-term use. For this reason, it was considered necessary to frequently replace the activated carbon in order to purify the air.

Here, the present inventor came up with the idea that the used activated carbon could be reused by heating, and when conducting experiments, it was found that when activated using microwaves, We obtained the knowledge that various regeneration effects can be achieved. This experimental apparatus will be described with reference to FIG. N
And O _X and N ₂ from the gas cylinder 102 filled through the glass tube 104, flow of NO _X and N ₂ in a U-shaped tube 106 is filled with a small amount of activated carbon 112 in the bottom, the NO _X in the activated carbon 112 After being adsorbed, it was collected in a tetra bag 108 and analyzed for gas components. At this time, 400 ppm of CO ₂ was contained in NO _X and N ₂ .

After NO _x was adsorbed on the activated carbon 112 for a predetermined time, microwaves were irradiated and heated in the microwave furnace 110, and the gas generated from the activated carbon 112 was analyzed. As a result, the CO ₂ concentration was 400 ppm before microwave irradiation.
However, it was found to have increased to 13000 ppm. From this fact, it was assumed that CO ₂ and N ₂ were generated from the C content of the activated carbon and the adsorbed NO ₂ , that is, the chemical reaction of the following formula 1 was occurring.

[Equation 1] C + NO ₂ → CO ₂ + 1/2 · N ₂

Here, the result of performance test of the activated carbon regenerated by the microwave will be described with reference to FIG. In the graph of FIG. 2, the horizontal axis represents time and the vertical axis represents NO ₂ concentration. Here, the curve α is the performance of the used activated carbon (21 g), the curve β is the performance of the new activated carbon (20 g), and the curve γ is the recycled activated carbon (16.65 g) that has been subjected to the microwave treatment described above. It shows the performance by. The used activated carbon is heavier than the new one because it adsorbs gas such as NO ₂ and water. Also, the fact that the recycled product is lighter than the new one is
In microwave treatment, C reacts with NO ₂ to form C
This is considered to be due to the change to O ₂ and evaporation of the contained water.

About 50 seconds after the start of the experiment, the air passing through each activated carbon reached the NO ₂ concentration measuring instrument.
Here, the used activated carbon is NO ₂ as shown by the curve α.
Not only can not be adsorbed but also released in the opposite direction, the concentration is 5
It increased from 50ppm to a maximum of 1450ppm. On the other hand, the activated carbon regenerated by microwaves exhibited almost the same NO ₂ adsorption performance as the new activated carbon (curve β) as shown by the curve γ.

Next, an embodiment of the automobile air cleaning apparatus of the present invention using the above-mentioned activated carbon will be described. The air purifying device 10 for an automobile includes an air control unit 5
It is provided on the upstream side of 0. The air control unit 50 is cooled or warmed by an evaporator 52 that vaporizes gas compressed by a compressor (not shown), a heater core 54 through which hot water is flown, and a cold air damper 56 that adjusts the amount of air blown to the heater core 54. It is composed of a blowout port 58 for blowing air to each part in the vehicle.

The air purifying device 10 for an automobile has an air introducing pipe 12 for taking in air from an air intake hole 12a on the indoor side or an air intake hole 12b on the outer side of the vehicle, and a blower 14 for sending air introduced from the air introducing pipe 12 under pressure. A branch pipe 13 for distributing the air from the blower 14, a first column 30A and a second column 30B for adsorbing harmful gas, a magnetron 44 for irradiating the first column 30A and the second column 30B with microwaves, 1 column 30A, 2nd column 3
Air outlet pipes 18A, 18B for guiding the air from 0B to the air control unit 50 side, exhaust pipes 16A, 16B for discharging the air to the outside of the vehicle, and a CO sensor 42 for detecting the CO concentration in the exhaust gas are provided. ing. The air introducing pipe 12 has a first damper 2 for switching the intake from the intake hole 12a on the indoor side and the intake hole 12b on the vehicle exterior side.
2 is provided, and the branch pipe 13 has a first column 30A.
For switching the derivation of air to the second column 30B and the second column 30B
A damper 24 is provided. Further, the air outlet pipe 18
A third damper 26 is provided between A and the exhaust pipe 16A, and a fourth damper 28 is provided between the air outlet pipe 18B and the exhaust pipe 16B. The first to fourth dampers 2
Switching between 2, 24, 26 and 28 is an air control device (not shown) that controls the air control unit 50.
Done by Further, a smoke sensor (not shown) is arranged in the vehicle to detect the presence or absence of smoke in the cigarette and output it to the air control device.

The first column 30A and the second column 30B are made of a dielectric container that allows electromagnetic waves from the magnetron 44 to pass through. Inside, a carbon fiber layer 32 for trapping dust as an adsorbent, and the carbon fiber layer are provided. downstream of the layer 32, for adsorbing zeolite layer 34 made of powdered zeolite which adsorbs ammonia which is a main component of offensive odor in the atmosphere (deodorization), NO _X, CO, the toxic components of the internal combustion engine such as HC Activated carbon layer 3 made of powdered activated carbon
6 and 6 are loaded. The activated carbon is NO as described above.
Good adsorption for _X. Also, zeolite is
It has a high adsorptivity for ammonia gas, which is a polar molecule, and water contained in the atmosphere. The content in air of the ammonia gas _is a very small amount with respect to NO X, CO, HC. Therefore, in the first column 30A and the second column 30B, it is possible to adsorb the ammonia gas with a small amount of zeolite with respect to the activated carbon. In addition,
By disposing the zeolite layer 34 upstream of the activated carbon layer 36, ammonia gas is adsorbed in advance in the zeolite layer 34, and then the remaining NO _X is adsorbed by the activated carbon. The first column 30A and the second column 3
OB is shielded by a shield plate 62 that prevents the microwaves emitted from the magnetron 44 from leaking.

FIG. 6A shows a cross section taken along the line AA of FIG. The output from the magnetron 44 is applied to the first column 30A or the second column 30B via the waveguide 46. The first microwave from the magnetron 44
Switching between the column 30A and the second column 30B is performed by a switching device 48 provided in the waveguide 46. The switching device 48 is driven by the air control device that controls the first to fourth dampers 22, 24, 26, 28 described above.

Here, the above-mentioned automobile air cleaning device 1
The operation of 0 will be described with reference to the flowcharts of FIGS. 7, 8 and 9. The air control device monitors the presence / absence of cigarette smoke with a smoke sensor arranged inside the vehicle, and when the smoke is detected, the air in the vehicle is taken into the air purifying device 10 for the vehicle for purification. This operation will be described with reference to the flowchart of FIG.

The air control device always uses the first damper 2
No. 2 is kept at the position on the outside air side so as to take in the outside air from the outside air intake hole 12b (S12). Then, unless the presence of smoke in the vehicle is detected based on the output of the smoke sensor (No in S14), the state of the first damper 22 is maintained and the outside air is taken in and purified as described later. Here, when it is detected that cigarette smoke is present inside the vehicle (Yes in S14), the first damper 22 is switched to take in the vehicle interior air from the inside air intake hole 12a (S16). This adsorbs smoke in the vehicle and purifies the air. Here, when the power supply to the air control unit 50 is turned off (Yes in S18), the air control device stops the control operation.

Next, the cleaning of air by the automobile air cleaning device 10 will be described. Here, description will be given assuming that the first, second, and third dampers 22, 24, and 26 are switched as shown in FIG. 3 to clean the air in the second column 30B.

The blower 14 takes in the outside air from the outside air intake hole 12b and sends it to the second column 30B side under pressure. In the second column 30B, the carbon fiber layer 32
After adsorbing dust, the zeolite layer 34 adsorbs ammonia and water, which are the main components of the bad odor in the atmosphere.
Thereafter, in the activated carbon layer 36, a harmful gas emitted from an internal combustion engine NO _X, CO, and adsorbs HC and the like to purify. The purified air is sent to the air control unit 50 side via the air outlet pipe 18B. In the air control unit 50, after cooling this air by the evaporator 52, a part of the air is sent to the heater core 54 by the cold air damper 56 and heated, and the cold air and the warm air are mixed to reach the temperature set in the air control device. The air is blown from the outlet 58 to each part of the vehicle.

Here, the fourth damper 28 is kept in a slightly opened position so that the air from the second column 30B is also sent to the exhaust pipe 16B side, and the harmful gas emitted from another vehicle is prevented. It is purified and released outside the vehicle. That is, in the automobile air purifying apparatus 10 of the present invention, the purified air is temporarily taken into the vehicle and then discharged to the outside of the vehicle, or the purified air is directly discharged to the outside of the vehicle.
NO _X in the harmful gas components discharged from the engine of a vehicle equipped with the automotive air cleaning apparatus 10, CO, by purifying harmful gas components in the above amounts HC, further evolves zero emissions honey Deployment by electric vehicle Achieves negative emissions and plays a role in environmental protection.

Next, the operation when the used activated carbon and the like are regenerated by the automobile air cleaning device 10 is shown in FIG.
This will be described with reference to the flowchart in FIG. Here, FIG.
As shown in, the performance of the second column 30B is reduced during the purification of the air in the second column 30B, and the operation for performing the air purification in the first column 30A and the regeneration operation in the second column 30B is performed. An example will be described.

The air control device monitors the CO concentration in the air purified by the first column 30A or the second column 30B by the CO sensor 42. Here, the first
When the activated carbon of the column 30A or the second column 30B is deteriorated and the adsorption performance of NO ₂ , CO, etc. is deteriorated and the CO concentration becomes equal to or higher than the set value (S22 is Yes), the second damper 24 causes the first column to It is determined whether the 30A side is closed (S24). Here, since the first column 30A side is closed (S24 is Yes), first, the second column 26B side is closed by the second damper 26 (S26), and air is pressure-fed to the second column 30B side. To prepare for regeneration. Then, the third damper 26 is opened (S28), and pressure-supplied to the air control unit 50 side of the purified air from the first column 30A via the air outlet pipe 18A is started. After that, the air outlet pipe 18 is connected by the fourth damper 28.
B is closed to prevent the exhaust gas generated during the regeneration of the second column 30B from flowing into the vehicle. Then, after switching the switching device 48 shown in FIG. 6 (A), electric power is supplied from a vehicle-mounted battery (not shown) to cause the magnetron 44 having a rating of 250 W to oscillate, and the microwave to the second column 3
0B is irradiated for 30 seconds and heated (S42).

In the second column 30B, the dust adhering to the carbon fiber layer 32 is incinerated by the microwave, and the ammonia NH ₃ adsorbed in the zeolite layer 34 is desorbed. Further, NO _x such as NO ₂ adsorbed on the activated carbon layer 36 is converted into N ₂ and CO ₂ as described above,
Exhaust pipe 16 after desorption of other gas components
B is released outside the vehicle. By this operation, the activities of the zeolite layer 34 and the activated carbon layer 36 are restored, and the zeolite layer 34 and the activated carbon layer 36 can be reused.

When the first column 30A is deteriorated, the above-mentioned step 24 becomes No, and step 34
At about 40, regeneration on the side of the first column 30A is achieved. On the other hand, when the power of the air control unit 50 is turned off (Yes in S42), the air control device stops the control operation.

As described above, in the first embodiment of the present invention,
Since the first column 30A and the second column 30B are alternately regenerated and used, the purification of air can be continued for a long time without refilling the activated carbon. In addition, in the first embodiment of the present invention, the first column 30A and the second column 30B.
Since two columns are used, the air can be purified by the other even when one is performing the regenerating operation, and thus the purified air can be continuously sent into the vehicle interior. Also, in this example, the activated carbon gradually decreases with NO ₂ during regeneration, but the granular activated carbon is loaded in the column, so a large amount of activated carbon can be retained per volume, so it can be maintained for a long period of time. Air can be continuously purified without replacement. Further, when the column is filled with granular activated carbon in this manner, it is preferable that the blower 14 is configured to send air under pressure to the first column 30A and the second column 30B.

In the first embodiment, NO ₂ is added to N ₂ and C.
Since the amount of activated carbon decreases when it is converted to O ₂ , the first column 30A and the second column 30B, which have been repeatedly used and regenerated for a period, are replaced with new ones. However, instead of this, it is also possible to configure the first column 30A and the second column 30B so that the amount of activated carbon reduced by use can be supplemented.

FIG. 9 shows another example of the control operation of the automobile air cleaning apparatus 10 of the first embodiment. In the control example shown in FIG. 8, the CO concentration is measured, and when the CO concentration becomes equal to or higher than the specified value, it is determined that the first column 30A or the second column 30B has deteriorated, and the regeneration operation is performed. In the example, the interval for performing the reproducing operation is switched according to the degree of air pollution.

The air control device monitors the concentration of soot by a smoke sensor arranged inside or outside the vehicle. If the degree of contamination is high (Yes in S62), a timer (not shown) is set to 30 minutes (S70). When the set 30 minutes have elapsed (S72 returns Yes
s), the operation starting from step 74 is started, and the first column 3 is started in the same manner as steps 26 to 42 described above with reference to FIG.
0A and the second column 30B are switched and a reproducing operation is performed (S76 to S92). On the other hand, when the pollution level is normal (No in S62, Yes in S64), the timer is set to 1 hour (S68). Then, when this set time has elapsed (Yes in S72), the operations in and after step 74 are started. Furthermore, when the degree of pollution is small (S62 is N
o, S64 is No), and the timer is set to 2 hours (S6
6). When this set time elapses (S72 returns Y
es), and the operations after step 74 are started.

FIG. 4 shows a modified example of the automobile air cleaning apparatus 10 of the first embodiment shown in FIG. In the embodiment shown in FIG. 3, the first column 30A and the second column 30B were packed with granular zeolite and activated carbon.
In the above example, the monolithic first column 30A and the second column 30B are used. That is, the zeolite 35 and the activated carbon 37 are carried on the inner wall 31 of the honeycomb structure. In this configuration, unlike the configuration shown in FIG. 3, the first column 30A
-Because the air resistance in the second column 30B is low, the blower 15 having a relatively weak pumping force pumps air to the first column 30A / second column 30B side.

As shown in FIG. 6A, in the first embodiment, the microwave is switched by the waveguide 46.
The magnetron 44 movably supported is attached to the first column 30.
The two columns can also be heated by moving to A or the second column 30B.

Next, with reference to FIG. 5 and FIG. 6B, an automobile air cleaning device 110 according to a second embodiment of the present invention will be described. In the first embodiment described above with reference to FIGS. 3 and 4, the first column 30A and the second column 30B are fixed and the air purification and regeneration are repeated, but in the second embodiment, 1 column 30A, 2nd column 30B,
It is configured to move the third column 30C and repeat purification and regeneration.

FIG. 5 shows the construction of the automobile air cleaning apparatus 10 of the second embodiment, and FIG. 6 (B) shows the BB cross section of FIG. First column 30A, second column 30B, third
The column 30C is held by a pair of disc-shaped holding plates 66, 66, and is rotated by the motor 68 shown in FIG. 5 in the clockwise and counterclockwise directions shown in FIG. 6B. . The first column 30A, the second column 30B, and the third column 30C are defined by holding plates 66, shield plates 62 arranged in the respective 66. FIG. 6 (B)
Air is sent from the blower 14 side to the column (currently the first column 30A) held at the lower right position of the holding plate 66 shown in FIG. Further, the column (the second column 30B) held at the lower left position of the holding plate 66 can be irradiated with the microwave from the magnetron 44. In addition, the column held at the upper position of the holding plate 66 (currently the third column 30
C) can be removed from the holding plate 66 and replaced with a new column. That is, by rotating the motor 68, the columns can be switched to purify the air, regenerate the activated carbon, and replace the columns.

In the configuration of the second embodiment, the column is switched to perform the operation, so that there is an advantage that it is easy to purify and regenerate the air by two or more columns. Further, in the second embodiment, a battery (not shown) dedicated to the magnetron 44 is provided in addition to the battery of the vehicle, and by supplying electric power from the dedicated battery,
The burden on the vehicle battery is reduced.

In addition, in the above-mentioned embodiment, the second column 30A and the second column 30B during the irradiation of microwaves are
Although the example in which the air is not supplied by the damper 24 has been described, the small amount of air is introduced by opening the 22nd damper 24 slightly even during the irradiation of microwaves to reduce NO ₂ to CO 2.
It is also possible to promote the reaction of converting to ₂ , N ₂ .

In the above-described first and second embodiments, harmful gas such as NO ₂ which could not be obtained by the conventional automobile air cleaning apparatus can be removed and introduced into the vehicle. Further, in the first and second embodiments, since harmful gas such as NO ₂ is removed and released outside the vehicle, not only the inside of the vehicle but also the air outside the vehicle can be purified, and negative emission can be realized. Furthermore, since activated carbon for removing harmful gases such as NO ₂ is repeatedly used by irradiating with microwaves, air purification can be continued without performing maintenance for a long period of time.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of an experimental device showing the operation principle of the present invention.

FIG. 2 is a graph of NO ₂ adsorption test by activated carbon.

FIG. 3 is a configuration diagram of an automobile air cleaning device according to a first embodiment of the invention.

FIG. 4 is a configuration diagram of an automobile air cleaning device according to a modification of the first embodiment of the present invention.

FIG. 5 is a configuration diagram of an automobile air cleaning device according to a second embodiment of the invention.

6 shows a cross section of a first column 30A and a second column 30B, and FIG. 6 (A) is a cross-sectional view taken along the line AA of FIG.
(B) is a BB sectional view of FIG. 5.

FIG. 7 is a flowchart showing a switching operation between air inside the vehicle and air outside the vehicle by the air control device.

FIG. 8: First column 30A / second by air control device
It is a flowchart which shows the switching operation of the column 30B.

FIG. 9: First column 30A / second by air control device
It is a flowchart which shows the switching operation of the column 30B.

[Explanation of symbols]

 10 Automotive Air Purifier 14 Blower 22 First Damper 24 Second Damper 36 Activated Carbon Bed 30A First Column 30B Second Column 44 Magnetron 50 Air Control Unit

Front page continued (72) Inventor Masako Sakai 2-19-12 Sotokanda, Chiyoda-ku, Tokyo Equus Research Co., Ltd.

Claims (3)

[Claims] 1. The NO _x- containing air introduced into an automobile is brought into contact with an adsorbent mainly composed of carbon particles to adsorb the NO _x, and then the adsorbent is irradiated with microwaves to obtain the NO _x. Is combined with the carbon particles, converted to carbon dioxide and nitrogen,
The separated from the adsorbent, wherein the adsorbent has left the NO _X, automotive air cleaning method which comprises causing again adsorb the NO _X in contact with air containing NO _X. 2. A container filled with an NO _X adsorbent mainly composed of carbon particles, and a blowing means for feeding air containing NO _X into the container and introducing the air adsorbing NO _X into the vehicle interior. The adsorbent of the container in which the NO _x adsorption operation has been performed by the air blower is irradiated with microwaves to convert the NO _x adsorbed by the adsorbent into carbon dioxide and nitrogen, and then the adsorbent is separated from the adsorbent. An air purifying apparatus for an automobile, comprising: microwave irradiating means. 3. A plurality of containers filled with an NO _X adsorbent mainly composed of carbon particles, and air containing NO _X is fed into one or more of the containers to obtain N 2.
An air blowing unit that introduces air having O _X adsorbed therein and an adsorbent in a container in which the NO _X adsorbing operation has been performed by the air blowing unit are irradiated with microwaves and NO _X adsorbed by the adsorbent is emitted. was converted to carbon dioxide and nitrogen, wherein composed of a microwave irradiation means for leaving the NO _X from the adsorbent, in microwave irradiation 1 of the container by the microwave irradiation means also, the withdrawal of the NO _X An air purifying apparatus for an automobile, characterized in that the air can be continuously sent to the other finished container by the blowing means.