JPH09309331A - Vehicle air purification device and control method thereof - Google Patents

Abstract

(57) Abstract: [PROBLEMS] To provide an air purifying device for an automobile capable of purifying air while preventing dirt on an adsorbent and a control method thereof. SOLUTION: When a high degree of air pollution is detected in the vehicle (Yes in S14), it is determined whether the degree of air pollution outside the vehicle is low (S44), and when the degree of air pollution outside the vehicle is low (S44).
44 is Yes), the fan 40 is stopped (S26), the adsorption filter 32 is prevented from being contaminated, and switching is made to the outside air introduction (S48), and air is introduced from outside the vehicle to reduce the degree of pollution inside the vehicle. Then, when the pollution degree is lowered by introducing the air outside the vehicle (Yes in S30), the fan 40 is rotated, and the adsorption filter 32 is irradiated with ultraviolet rays from the metal halide lamp 36 to start air purification (S52, S54). ).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle air purifying apparatus for purifying air inside a vehicle by using an adsorbent while regenerating the adsorbent and a control method thereof.

[0002]

2. Description of the Related Art An air purifying apparatus for an automobile has been put into practical use, in which activated carbon or the like is housed in a cartridge, and the air in the vehicle is sent under pressure to the cartridge to purify cigarette smoke, odor and the like. Here, in an automobile air purifying apparatus, a disposable type adsorbent such as activated carbon has been used. Therefore, the air could not be properly purified unless the adsorbent was continuously replaced.

[0003]

The applicant of the present invention has proposed in Japanese Patent Application No. 7-350606 a purifying device for purifying the air inside the vehicle while regenerating the adsorbent. The purification device is intended to purify the NO _X, the relatively low concentration of harmful gas such as CO discharged by another vehicle or the like. Here, NO _X is once adsorbed by an adsorbent made of activated carbon, then is desorbed by heating the activated carbon and is discharged to the outside of the vehicle. On the other hand, CO is CO ₂ using a CO oxidation catalyst.
To oxidize.

Here, when regenerating the activated carbon, NO _X can be desorbed relatively easily, but it takes time for desorbing the cigarette smoke generated in the vehicle from the adsorbent. In addition to this, it has been found that once the smoke of the cigarette is once adsorbed, it is difficult to completely remove it, so that the NO _X adsorption performance deteriorates after the regeneration.

The present invention has been made to solve the above problems, and an object of the present invention is to provide an automobile air purification apparatus and a control method therefor capable of purifying air while preventing dirt on an adsorbent. To provide.

[0006]

In order to achieve the above object, a first aspect of the present invention is an air purifying apparatus for an automobile that purifies air, wherein an adsorbent for air purification and air for the adsorbent are provided. An air blower for purifying the air inside the vehicle by pressure feeding, an inside air detecting means for detecting the degree of pollution of the air inside the vehicle, a switching device for switching between the inside air circulation and the outside air introduction, and the degree of pollution detected by the inside air detecting means. And a control means for controlling the blower and the switching device, wherein the control means blows the air when the inside air detection means detects a contamination degree higher than a preset value. The technical feature is to stop the device and switch to the outside air introduction when the inside air circulation is set by the switching device.

A second aspect of the present invention is an air purification apparatus for an automobile that purifies air, comprising an adsorbent for air purification, and an air blower for pumping air to the adsorbent to purify the air inside the vehicle. An inside air detecting means for detecting the degree of pollution of the air inside the vehicle,
Outside air detection means for detecting the degree of pollution of the air outside the vehicle, switching device for switching between inside air circulation and outside air introduction, and control means for controlling the blower device and the switching device based on the degree of pollution detected by the detection means. The control means detects a pollution degree higher than a first value preset by the inside air detection means, and a second value preset by the outside air detection means. When the internal air circulation is set by the switching device, the air blower is stopped when no pollution is detected, or when the degree of pollution higher than a detection value of the internal air detection means is not detected. The technical feature is to switch to the introduction of outside air.

According to a third aspect of the present invention, in the first or second aspect, the control means detects a high degree of pollution by the inside air detection means, stops the air blower, and switches to outside air introduction by a switching device. After that, when the inside air detection means detects a pollution level lower than a preset third value, the blower is started, and the switching device switches to the inside air circulation. And

Further, a fourth aspect of the present invention is a method of controlling an air purifying apparatus for an automobile, which purifies air by using an adsorbent for air purification while regenerating the adsorbent. A step of determining whether or not the detected pollution degree is larger than a set value, and the adsorbent when it is judged in the step that the detected pollution degree is larger than the set value. And the step of introducing the air outside the vehicle while stopping the purification of the air by.

[0010]

According to the first aspect of the present invention, the control means stops the air blower to prevent the adsorbent from being contaminated when the inside air detection means detects a contamination level higher than a preset value. When the inside air circulation is set by the switching device, the outside air is introduced and the air outside the vehicle is introduced to reduce the pollution degree inside the vehicle.

According to the second aspect of the present invention, when the inside air detecting means detects a contamination degree higher than the first value and the outside air detecting means does not detect the second value, or the inside air detecting means. When the pollution degree higher than the detection value by a predetermined value or more is not detected, that is, when the air outside the vehicle has a lower pollution degree than the inside of the vehicle, the control means stops the air blower and stains the adsorbent. In addition to preventing the above, when the internal air circulation is set by the switching device, it is switched to the external air introduction and the air outside the vehicle is introduced to reduce the pollution degree inside the vehicle.

According to the third aspect of the present invention, when the high degree of pollution is detected by the inside air detecting means, the control means stops the air blower to prevent the adsorbent from being contaminated, and the switching device removes the air outside the vehicle. Introduce it to reduce the degree of pollution inside the vehicle. Then, when the pollution degree falls below the third value by introducing the air outside the vehicle, the air blower is started to start the purification of the air.

According to the fourth aspect of the present invention, when the degree of pollution higher than a preset value is detected, the purification of the air by the adsorbent is stopped to prevent the adsorbent from being contaminated and the air outside the vehicle is introduced. By doing so, the degree of pollution inside the vehicle is reduced.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments embodying the present invention will be described below with reference to the drawings. FIG. 1 shows an air purification device 10 and an air control device 50 according to a first embodiment of the present invention. Air control device 5
0 is arranged in the engine room of the vehicle, and the air purifying device 10 is arranged in the trunk room.

The air control device 50 includes a fan 70 for feeding air under pressure, a motor 72 for rotating the fan 70, and an evaporator 7 for expanding the refrigerant to cool the air.
4, a heater core 76 that heats air with cooling water from the engine, and an air mix damper 52 that adjusts the temperature by controlling the amount of air passing through the evaporator 74 to the heater core 76 side. ing.
Further, in the air control device 50, an inside air inlet 60 for introducing air inside the vehicle, an outside air inlet 61 for introducing air from outside the vehicle, an inside air inlet 60 and an outside air inlet 6
1, an intake damper 51 that switches between 1, a defroster port 63 that sends air to the defroster side that removes fogging of the window glass, a defroster damper 53 that opens and closes the defroster port 63, and a ventilator port 64 that blows air into the vehicle. A ventilator damper 54 that opens and closes the ventilator port 64, a floor port 65 that blows air to the feet, a floor damper 55 that opens and closes the floor port 65, and a motor control circuit 8 that controls the rotation of the motor 72.
4 and. The outside air inlet 61 has NO _X outside the vehicle.
An outside air odor sensor 48 for detecting the concentration and the like is provided. These dampers 51, 52, 53, 54, 55
The motor control circuit 84 is configured to be controlled by the air control control device 88.

On the other hand, the air purifying apparatus 10 includes a blow-out pipe 24 for blowing air into the vehicle, an exhaust pipe 26 for discharging exhaust gas, a first damper 11 for switching the blow-out pipe 24 and the exhaust pipe 26, and the blow-out pipe. Pipe 24 or exhaust pipe 26
Fan 40 for pumping air to the motor, a DC motor 42 for driving the fan 40, a motor control circuit 14 for stopping and operating the DC motor 42, an adsorption filter 32 for adsorbing NO _X , and CO for CO A CO oxidation catalyst 34 for oxidizing to ₂ , a metal halide lamp 36 for irradiating the adsorption filter 32 with ultraviolet rays, a ballast 16 for switching on the metal halide lamp 36 and switching the irradiation amount of ultraviolet rays, and taking in air from inside the vehicle. And an intake pipe 22 for

The air purifying device 10 includes a temperature sensor 38 for detecting the surface temperature of the adsorption filter 32, and an upstream odor sensor 44 for detecting the odor of cigarettes, NO _x, etc. before passing through the adsorption filter 32. And a downstream odor sensor 46 for detecting the odor after passing.
As the upstream odor sensor 44, the downstream odor sensor 46, and the outside air odor sensor 48, for example, an n-type semiconductor gas sensor that detects the oxidation reaction rate of the gas adsorbed on the porous semiconductor surface can be used.

The speed of the motor 42 is controlled by a PWM signal from the motor control circuit 14. Further, the metal halide lamp 36 is configured such that a voltage is applied by the ballast 16 so that the metal halide lamp 36 is extinguished / lit and the illuminance is adjusted. The motor control circuit 14 and the ballast 16 are configured to be controlled by the control device 18. The control device 18 uses the signals from the upstream odor sensor 44 and the downstream odor sensor 46 to describe the rotation speed of the motor 42, the illuminance of the metal halide lamp 36, and the first damper 11 with reference to FIGS. To control. The control unit 18 gives a signal to the air control controller 88, in conjunction with driving the intake damper 60, receives the NO _X such concentration outside the vehicle detected by the outside air odor sensor 48 from the air control controller 88 Is configured to be able to.

The adsorption filter 32 includes a metal filter, activated carbon for adsorbing odorous components such as NO _X , and a photocatalyst made of TiO ₂ which oxidizes and decomposes aldehydes, ammonia, etc. which are difficult to adsorb with activated carbon. Is loaded with an adsorbent. The photocatalyst is activated by ultraviolet rays from the metal halide lamp 36, oxidizes and decomposes aldehydes, ammonia, etc., which are the main components of the odor of tobacco, which are difficult to be adsorbed by the adsorption filter 32, by a photocatalytic reaction, and finally water. , Carbon dioxide, nitric acid.
Further, this photocatalyst also has an action of oxidizing NO that is difficult to be adsorbed by activated carbon into NO _X that is easily adsorbed by activated carbon.

The filter is formed by stacking members obtained by folding stainless thin plates in a honeycomb shape. Here, by using a filter obtained by folding a thin plate in a honeycomb shape as a filter for supporting the adsorbent, it is possible to reduce the pressure loss, increase the surface area of the adsorbent, and efficiently irradiate ultraviolet rays. I have to.

The photocatalyst for the oxidation and decomposition in substances more like HNO ₃ and NO _X adsorbed in the adsorbent, NO _X is suppressed the rate at which accumulated in the activated carbon by supporting a photocatalyst. In addition to this, since various organic substances (odorous components) other than NO _x that actually exist inside and outside the vehicle are oxidized and decomposed, the rate at which the organic substances accumulate can be suppressed,
Organic substances once adsorbed by the adsorbent can also be oxidized and decomposed.

[0022] In the photocatalyst even while degradation such as NO _X, continues to be adsorbed to NO _X such as activated carbon decreases the adsorption performance. Therefore, in the air purification device 10 of the first embodiment, the surface temperature of the adsorption filter 32 is increased by increasing the intensity of the ultraviolet light emitted from the metal halide lamp 36,
Desorb the adsorbed material to regenerate the adsorbent,
By increasing the activity of the photocatalyst, oxidation by the photocatalyst
Further decomposed to promote, and allowed removing odor components of the NO _X or the like which is adsorbed on activated carbon.

On the other hand, the CO oxidation filter 34 comprises a carrier such as activated carbon fiber or alumina carrying a precious metal oxidation catalyst such as Pd for oxidizing CO into CO ₂ .

Next, the operation of the air purifying device 10 will be described with reference to the flow charts of FIGS. First, the control device 60 determines whether or not a start-up switch (not shown) provided on the instrument panel on the driver side has been operated (S12). Here, when the activation switch is operated (Yes in S12), it is determined whether an outside air introduction switch (not shown) is operated (S14). Here, the outside air introduction switch is for introducing the outside air in advance before the driver smokes, and when the switch is operated (Yes in S14), the process proceeds to step 18 to introduce the outside air. To start. On the other hand, unless the switch is operated (S14 is No), the pollution degree of the air before passing through the adsorption filter 32 is measured by the upstream odor sensor 44, and it is determined whether the pollution degree inside the vehicle is higher than a preset value. (S1
6). Here, when the passenger in the vehicle smokes and the pollution degree becomes higher than the set value (Yes in S16), the process proceeds to step 18 and it is determined whether or not the outside air is introduced. On the other hand, when the passenger in the vehicle does not smoke and the pollution degree is lower than the set value (No in S16), the process proceeds to step 50, and the air in the vehicle is purified.

When the occupant in the vehicle smokes as described above (Yes in S16), the process proceeds to step 18, and the intake damper 51 of the air control device 50 opens the inside air inlet 60 or the outside air. Inlet 61
Is opened, that is, which of the inside air circulation and the outside air introduction is set by the driver is determined. here,
When the inside air circulation is set (No in S18),
Proceeds to the step 44, the concentration of the NO _X etc. detected outside by the outside air odor sensor 48 to determine whether higher than a preset level. In determination of step 44, but compares the outside of the NO _X such as density and a preset is detected level, instead of this, compared to a level detected in the car, for example, the level of the outside air It is also preferable to judge that the level is high when the level in the vehicle is 1.2 times or more.

When it is determined that the degree of pollution outside the vehicle is high and the inside of the vehicle cannot be cleaned by introducing the outside air (Yes in S44), the process proceeds to step 52 and the inside of the vehicle is introduced without introducing the outside air. To start cleaning the air. On the other hand, when the pollution level outside the vehicle is low and the inside of the vehicle can be cleaned by introducing the outside air (No in S44), first,
After setting the inside air flag indicating that the inside air circulation has been switched to the outside air introduction (S46), the air control device 5
A control signal is sent to the 0 side, the outside air introduction port 61 is opened by the intake damper 51 (S48), and the process proceeds to step 20.

Here, in the judgment in step 18 as to whether the outside air introduction is set, when the outside air introduction has already been set (Yes in S18), and after switching to the outside air introduction (S48). Then, the process proceeds to step 20. In this step 20, it is judged whether or not the air flow rate of the fan is set high enough to discharge the smoke of the cigarette in the vehicle. Here, when the high air flow rate is set (No in S20), the process proceeds to step 26. On the other hand, when only a low air flow rate is set (S20
Yes), the air blowing flag indicating that the air blowing amount has been increased is set (S22), and then the fan 70 is accelerated to increase the air blowing amount (S24).

Subsequently, the fan 4 on the air purifying device 10 side
While 0 is stopped (S26), the metal halide lamp 36 is turned off (S28), the purification of air is interrupted, and the smoke of the cigarette is prevented from being adsorbed by the adsorption filter 32. After that, the upstream odor sensor 44 measures the degree of pollution in the vehicle to determine whether the degree of pollution becomes lower than a predetermined value and the adsorption filter 32 is not contaminated (S30). Until the dyeing degree becomes lower than the predetermined value (No in S30), the process returns to step 26, and the inside of the vehicle is continuously cleaned by introducing the outside air. When the pollution degree becomes lower than the predetermined value (S30 is Yes
s), it is determined whether the inside air flag indicating that the inside air circulation is switched to the outside air introduction is set (S32), and when the inside air flag is set (S32 is Yes),
After clearing the inside air flag (S34), the intake damper 51 of the air control device 50 is operated to switch from the outside air introduction to the inside air circulation (S36). Further, it is determined whether or not the air blowing flag indicating that the air blowing amount has been increased is set (S38), and if the air blowing flag is set (S38 is Yes), the air blowing flag is cleared (S40). ), The air flow rate of the fan 70 of the air control device 50 is switched to the set low air volume (S).
42).

After that, the routine proceeds to step 52, where purification of air is started. That is, while rotating the fan 40 of the air purifying device 10 (S52), the adsorption filter 32 is irradiated with the ultraviolet rays from the metal halide lamp 36 (S54) to decompose and adsorb NO _X by the adsorption filter 32, and C
CO is oxidized to CO ₂ by the O oxidation catalyst 34. Then, it is determined whether the start switch is turned off (S56),
When it is turned off (Yes in S56), the air purification device 1
The operation of 0 is stopped (S58, S60). On the other hand, unless turned off (No in S56), the process returns to step 14,
Continue purifying the air.

Here, when the air purification is continued and the adsorption rate of the adsorption filter 32 decreases, the degree of pollution before the adsorption filter 32 passes detected by the upstream odor sensor 44 and after the passage detected by the downstream odor sensor 44. There is no difference with the pollution degree of. As a result, it is determined that the adsorption filter 32 has deteriorated (Yes in S50), the process proceeds to the section A, and the regeneration operation of the adsorption filter 32 is started.

The reproducing operation will be described with reference to the flowchart of FIG. First, the first damper 11 is operated to open the exhaust pipe 26 (S62). Then, the ultraviolet light emitted from the metal halide lamp 36 to the adsorption filter 32 is strengthened (S64). Then, it is determined whether the surface temperature of the adsorption filter 32 detected by the temperature sensor 38 has reached the set temperature (for example, 80 ° C.) (S66). Until the temperature reaches the predetermined temperature (Yes in S66), the fan 40 is stopped and the ventilation is stopped to stop the metal halide lamp 3
The adsorption filter 32 is heated by ultraviolet rays from 6. When the set temperature is reached (No in S66), the fan 4
0 is started to cool the adsorption filter 32. That is, the suction filter 32 is maintained at the set temperature by intermittently operating the fan 40 in steps 66, 68, and 70. Then, after the time set for regeneration has elapsed (Yes in S72), the first damper 11 is operated to open the air outlet 24 for discharging the air to the inside of the vehicle (S74), and then, as shown in FIG. The process proceeds to step 52 and the air purification is restarted.

Next, a second embodiment of the present invention will be described with reference to FIGS. In the first embodiment described above, the outside air introduction and the inside air circulation are switched on the air control device 50 side, but in the second embodiment, the outside air introduction and the inside air circulation are provided on the air purification device 110 side. I am making it. This air purification device 110
Is disposed in the trunk room of the vehicle or on a partition plate (rear shelf) that separates the trunk room from the vehicle compartment.

The configuration of the air purifying device 110 of the second embodiment will be described with reference to FIG. Here, the same reference numerals are used for the same members as in the first embodiment, and the description thereof will be omitted. In the first embodiment described above,
As the NO _X adsorbent, the adsorption filter 32 in which the activated carbon and the photocatalyst are supported on the metal filter is used, but in the second embodiment, the activated carbon fiber folded in the shape of pleats carries the photocatalyst. N for activated carbon filter 31
The O _X are adsorbed. In addition, this air purification device 110
A bypass pipe 28 for discharging the air inside the vehicle to the outside of the vehicle (trunk room) by a fan 40 without passing through the activated carbon filter 31 is attached, and the air is taken into the bypass pipe 28 and the activated carbon filter 31 side. The intake pipe 22 for opening and closing is opened and closed by the second damper 12.
Also, an outside air odor sensor 4 for detecting the degree of pollution outside the vehicle
8 is directly connected to the control device 18 side of the air purification device 110.

The operation of the air purifying device 110 of the second embodiment will be described with reference to the flowchart of FIG. In addition, about the same operation | movement as the air purification apparatus 10 of 1st Embodiment mentioned above with reference to FIG. 2, while using the same step number, detailed description is abbreviate | omitted.

The control device 60 determines whether or not a start switch (not shown) provided on the instrument panel on the driver's seat side is operated (S12). Here, when the activation switch is operated (Yes in S12), it is determined whether an outside air introduction switch (not shown) is operated (S14). Here, unless the switch is operated (S14 is No),
It is determined whether the degree of pollution in the vehicle is higher than a preset value (S16). Here, smoking car occupant, when the degree of contamination is higher than the set value (S16 is Yes), the operation proceeds to step 44, the NO _X such concentration outside the vehicle detected by the outside air odor sensor 48, preset Determine if it is higher than the given level. Here, when it is determined that the pollution level outside the vehicle is high and the inside of the vehicle cannot be cleaned by introducing the outside air (Yes in S44), the process proceeds to step 52, and the air inside the vehicle is removed without introducing the outside air. Start purification. On the other hand, when the pollution level outside the vehicle is low and the inside of the vehicle can be cleaned by introducing the outside air (No in S44), first, the second damper 12 is operated to open the bypass pipe 28 (S21). 1 The damper 11 is operated to open the exhaust pipe 26 for discharging the exhaust gas (S23). Then, the fan 40 is rotated to discharge the smoke inside the vehicle to the outside of the vehicle through the trunk room (S28). At this time, the metal halide lamp 36 is turned off (S28).

After that, when the degree of pollution inside the vehicle becomes lower than a predetermined value and the adsorption filter 32 is not contaminated (Yes in S30), the second damper 12 is operated to open the intake port 22 (S33). , The first damper 11 is operated to open the blow-out pipe 24 for discharging air into the vehicle (S35), and the process proceeds to step 52 to start the purification of air.

In the above-mentioned first and second embodiments,
Although the metal halide lamp 36 irradiates the adsorption filter 32 with relatively weak ultraviolet light even during the cleaning process, the ultraviolet light from the metal halide lamp 36 may be irradiated only during the regeneration process.

In the above-described embodiment, the automobile air purification device 10 purifies harmful substances such as NO _x and CO discharged from other vehicles. However, the present invention is not limited to the activated carbon or silica gel. It goes without saying that the agent can also be used in an air purifying device of the type for purifying a bad smell such as cigarette smoke in a vehicle.

In the present embodiment, since the activated carbon is used while desorbing the adsorbed substance, the air can be continuously purified for a long time without exchanging the activated carbon. Furthermore,
Since high heat is not applied during the desorption operation of the adsorbed material, the activated carbon is not deteriorated.

The ultraviolet lamp is not limited to the metal halide lamp as long as it can excite the photocatalyst, and various lamps can be used. Furthermore, in the first and second embodiments, TiO ₂ is used as the photocatalyst, but various materials can be used as long as they can oxidize and decompose odorous components. For example, Ti, Cu, Zn, La, Mo, V, Sr, B
at least one selected from the group consisting of oxides of a, Ce, Sn, Fe, W, Mg, or Al, and a noble metal.
Can be composed of types. Further, the photocatalyst can be supported not by activated carbon but by an adsorbent such as silica gel.

[0041]

As described above, according to the air purifying apparatus for a vehicle and the control method for the same of the present invention, the smoke of the cigarette which is difficult to be desorbed during the regenerating operation is discharged to the outside of the vehicle without being adsorbed by the adsorbent. Therefore, it is possible to adsorb the interior of the NO _X while playing for a long time without fouling the adsorbent.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an air control device and an air purification device according to a first embodiment of the present invention.

FIG. 2 is a flow chart showing an air purification operation by the air purification apparatus shown in FIG.

FIG. 3 is a flowchart showing a regeneration operation of an adsorption filter by the air purification apparatus shown in FIG.

FIG. 4 is a configuration diagram of an air purifying apparatus according to a second embodiment of the present invention.

FIG. 5 is a flow chart showing an air purification operation by the air purification apparatus according to the second embodiment.

[Explanation of symbols]

 10 Air Purifying Device 12 Second Damper 18 Control Device 31 Activated Carbon Filter 32 Adsorption Filter 40 Fan 44 Upstream Odor Sensor 48 Outside Air Odor Sensor 50 Air Control Device 51 Intake Damper 70 Fan 88 Air Control Control Device

Claims (4)

[Claims] 1. An automobile air purification device for purifying air, comprising an adsorbent for air purification, a blower device for pumping air to the adsorbent to purify the air in the vehicle, and the air in the vehicle. An inside air detecting means for detecting the degree of pollution, a switching device for switching between the inside air circulation and the outside air introduction, and a control means for controlling the blower device and the switching device based on the degree of pollution detected by the inside air detecting means, Having the control means, when the degree of pollution higher than a preset value is detected by the inside air detection means, the blower is stopped and the inside air circulation is set by the switching device. An air purification device for automobiles, which switches to the introduction of outside air when the vehicle is on. 2. An automobile air purification apparatus for purifying air, comprising an adsorbent for air purification, a blower for pumping air to the adsorbent to purify the air in the vehicle, and The inside air detecting means for detecting the degree of pollution, the outside air detecting means for detecting the degree of pollution of the air outside the vehicle, the switching device for switching between the inside air circulation and the outside air introduction, and the air blower based on the degree of pollution detected by the detecting means. A control unit for controlling the device and the switching device, wherein the control unit detects a pollution degree higher than a preset first value by the inside air detection unit, and the outside air detection unit. When the second value set in advance is not detected, or when the pollution degree higher than the detection value of the inside air detection means by a predetermined value or more is not detected, the blower is stopped and the switching device is operated. Automobile air purification device, characterized in that switching to the outside air introduced when inside air recirculation is set. 3. The inside air detecting means presets the inside air detecting means after the inside air detecting means detects a high degree of pollution, stops the air blower, and switches to outside air introduction by a switching device. The air purifying apparatus for an automobile according to claim 1 or 2, wherein, when a pollution degree lower than the third value is detected, the air blower is started, and the inside air circulation is switched by the switching device. 4. A method for controlling an air purification apparatus for an automobile, which purifies air by using an adsorbent for air purification while regenerating the adsorbent, the method comprising: detecting the degree of pollution of air in the vehicle; and the detected degree of pollution. Is determined to be greater than the set value, and in the step, when it is determined that the detected pollution degree is greater than the set value, the air purification by the adsorbent is performed. Stopping and introducing air outside the vehicle.