JP2014035125A - Air purifier for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air purifier for vehicle that can resolve a difference in a purifying function among areas on an air passing plane of a vehicular component that carries an ozone purification body.SOLUTION: Circle areas shown in Fig. 6 indicate rotational speeds (or revolution) of fans and a larger circle area means a higher speed (or higher revolution). As shown in Fig. 6(A), radiator fans 16 and 18 show an equivalent rotational speed under a normal control, in which travel air passing through a radiator 14 is distributed ununiformly to create a difference in the integrated value of passing air amounts among areas. Meanwhile, a difference in the integrated value of passing air amounts among areas can be resolved under a fan revolution adjustment control as shown in Fig. 6(B). As a result, an ozone purification rate can be flattened on the surface of the radiator 14 and therefore deterioration of components of an ozone purification body can be prevented before it happens.

Description

  The present invention relates to a vehicle air purification device, and more particularly to a vehicle air purification device that can purify ozone in the atmosphere.

  Ozone, which is the cause of photochemical smog, is generated by the photochemical reaction of HC and NOx contained in the exhaust gas of automobiles and factories. For this reason, suppressing the emission amount of HC and NOx from the automobile is an effective means for suppressing the generation of ozone and preventing the generation of photochemical smog. On the other hand, as a means for preventing the generation of photochemical smog, it is conceivable to directly purify ozone in the atmosphere. Not only aiming to reduce the emission of HC and NOx, which are reactants, but also purifying ozone, which is a product, it is possible to more effectively prevent the generation of photochemical smog. From this point of view, automobiles equipped with a vehicle air purification device that can directly purify ozone in the atmosphere are put into practical use in some areas including California, USA. This vehicle air purification device is particularly called a DOR (Direct Ozone Reduction) system.

  For example, Patent Document 1 discloses a DOR system in which a metal oxide such as manganese dioxide is supported on a vehicle component such as a radiator. A radiator is arranged at a place where an air flow path is formed while a vehicle is running, and a metal oxide such as manganese dioxide converts ozone contained in the atmosphere into other substances such as oxygen. It is an ozone purifier having a purifying function. Therefore, according to the DOR system of Patent Document 1, ozone in the atmosphere can be directly purified while the vehicle is traveling.

JP-T-2002-514966 JP 2009-029149 A US Pat. No. 7,473,402 US Pat. No. 6,849,177 Special table 2003-515442 gazette

  However, according to the ventilation characteristic test conducted by the present inventors, it has been clarified that there is a difference between regions in the purification function of the ozone purifier on the air passage surface of the radiator while the vehicle is running. Since the ozone purifier deteriorates due to a deterioration factor contained in the atmosphere, if the difference between the purifying functions increases, partial deterioration of the ozone purifier may progress and the purifying efficiency may decrease. Therefore, in order to prevent such a problem, further improvement is necessary.

  The present invention has been made in view of the above-described problems. That is, an object of the present invention is to provide a vehicle air purification device that can eliminate the difference between the purification function regions on the air passage surface of the vehicle component carrying the ozone purifier.

In order to achieve the above object, a first invention is a vehicle air purification apparatus,
Vehicle components having an air passage surface through which air passes during vehicle travel;
An ozone purifier for purifying ozone provided in the vehicle component;
Passing air distribution adjusting means for adjusting the distribution of the passing air in the air passing surface direction;
Purification rate distribution equalizing means for controlling the passing air distribution adjusting means so as to equalize the ozone purification rate distribution in the air passage plane direction;
It is characterized by providing.

The second invention is the first invention, wherein
Purification rate distribution acquisition means for acquiring a distribution of ozone purification rate in the air passage plane direction;
The purification rate distribution uniformizing means controls the passing air distribution adjusting means based on the acquired ozone purification rate distribution.

The third invention is the first or second invention, wherein
The vehicle component is a radiator or an intercooler;
The passing air distribution adjusting means is a plurality of fans attached to the vehicle component;
The purification rate distribution uniformizing means equalizes the ozone purification rate distribution by adjusting a rotation speed ratio of the plurality of fans.

In addition, a fourth invention is any one of the first to third inventions,
The vehicle component is a radiator for passing cooling water,
The passing air distribution adjusting means is a plurality of fans attached to the vehicle component;
The purification rate distribution equalizing means continuously changes the rotation speed of each of the plurality of fans, and shifts a cycle of a series of operations between the plurality of fans. Provided with mode switching means for switching between the normal mode for equalizing each rotational speed,
The mode switching means switches to the normal mode when cooling water is passed through the radiator.

The fifth invention is the invention according to any one of the first to fourth inventions,
The ozone purifier includes at least one of activated carbon and manganese dioxide.

The sixth invention is the first or second invention, wherein
The ozone purifier includes activated carbon,
The purification rate distribution uniformizing means controls the passing air distribution adjusting means so that more air passes through a low temperature region where the temperature of the ozone purifier is lower than a high temperature region where the temperature of the ozone purifier is high. A passing air amount adjusting means is provided.

The seventh invention is the sixth invention, wherein
A temperature distribution acquisition means for acquiring a temperature distribution of the ozone purifier in the air passage plane direction;
The passing air amount adjusting means controls the passing air distribution adjusting means based on the acquired temperature distribution.

The eighth invention is the sixth or seventh invention, wherein
The vehicle component is a radiator having an internal flow path through which cooling water flows.
The passing air distribution adjusting means is a plurality of fans attached to the radiator,
The passing air amount adjusting means adjusts the rotation speed ratio of the plurality of fans, thereby allowing the passage air volume adjusting means to adjust the downstream area of the internal flow path that is the low temperature area as compared to the upstream area of the internal flow path that is the high temperature area. It is characterized by allowing many atmospheres to pass through.

The ninth invention is the sixth or seventh invention, wherein
The vehicle component is a radiator having an internal flow path through which cooling water flows.
The passing air distribution adjusting means is a grill shutter provided in front of the radiator and capable of adjusting an opening.
The passing air amount adjusting means adjusts the opening degree of the grille shutter so that the passage air amount adjusting means is more in the downstream area of the internal flow path that is the low temperature area than the upstream area of the internal flow path that is the high temperature area. It is characterized by allowing air to pass through.

The tenth invention is the invention according to any one of the sixth to ninth inventions,
The ozone purifier contains manganese dioxide.

  According to the first aspect of the invention, the passing air distribution adjusting means is controlled by the purifying rate distribution uniformizing means so as to equalize the distribution of the ozone purifying rate in the air passage plane direction. The difference between the areas of the body's ozone purification rate can be eliminated. Therefore, it is possible to extend the life of the ozone purification function of the vehicle component.

  According to the second aspect of the present invention, the passing air distribution adjusting means is controlled based on the ozone purification rate distribution acquired by the purification rate distribution acquiring means, so that the difference between the ozone purification rates of the ozone purifiers can be eliminated with high accuracy. it can.

  According to the third aspect of the present invention, since the rotation rate ratio of the plurality of fans attached to the radiator or the intercooler is adjusted by the purification rate distribution uniformizing means, the difference between the ozone purification rates of the ozone purification bodies provided in these regions is different. Can be eliminated.

  It is necessary to give priority to the cooling request for the cooling water when passing the cooling water. In this respect, according to the fourth aspect of the invention, the mode switching means switches the normal mode to the flow of the cooling water to the radiator, so that the cooling water cooling is insufficient due to the execution of the rotation speed adjustment mode. Can be prevented.

  According to the fifth aspect, since the ozone purifier includes at least one of activated carbon and manganese dioxide, ozone can be purified efficiently.

  Activated carbon has a problem that it easily deteriorates when the bed temperature during ozone purification is high. In this regard, according to the sixth invention, the purification rate distribution uniformizing means allows more air to pass through the low temperature region where the temperature of the ozone purifier is lower than the high temperature region where the temperature of the ozone purifier is high. Therefore, even if the ozone purifying body contains activated carbon, the difference between the ozone purifying rates of the ozone purifying bodies can be eliminated.

  According to the seventh aspect, since the passing air distribution adjusting means is controlled based on the temperature of the ozone purifying body acquired by the temperature distribution acquiring means, the difference between the ozone purifying rates of the ozone purifying bodies can be eliminated with high accuracy. .

  According to the eighth aspect of the invention, the internal air flow that becomes the low temperature region as compared with the upstream region of the internal flow path that becomes the high temperature region by adjusting the rotation speed ratio of the plurality of fans by the passing air amount adjusting means. Since a larger amount of air is passed through the downstream area of the road, it is possible to eliminate the difference between the ozone purification rates of the ozone purifiers provided in the radiator.

  According to the ninth aspect of the present invention, by adjusting the opening of the grill shutter by the passing air amount adjusting means, the internal flow path of the internal flow path that becomes the low temperature region as compared with the upstream area of the internal flow path that becomes the high temperature region is adjusted. Since more atmosphere passes through the downstream area, the difference between the ozone purification rates of the ozone purifiers provided in the radiator can be eliminated.

  According to the tenth invention, since the ozone purifier contains manganese dioxide, ozone can be purified efficiently.

It is a figure which shows the structure of the vehicle carrying the air purification apparatus of Embodiment 1. FIG. It is a front view of the radiator 14 of FIG. It is a figure which shows the six division area of the radiator. It is the figure which showed the result of the ventilation characteristic test. It is the figure which showed the ozone purification rate before and behind a ventilation characteristic test. FIG. 6 is a diagram for illustrating control in the first embodiment. FIG. 10 is a diagram for illustrating control in the second embodiment. 6 is a flowchart illustrating fan speed control executed by an ECU 30 in the second embodiment. It is the figure which showed the relationship between the deterioration rate of an ozone purifier, and a factor substance total amount. It is the figure which showed the relationship between the voltage V and the vehicle speed which are applied to a radiator fan, and a radiator passing wind speed. It is the figure which showed the relationship between a vehicle travel distance and an ozone purification rate for every vehicle speed. It is the figure which showed the relationship between the purification body contact probability and the radiator passing wind speed. 10 is a flowchart showing fan rotation speed control executed by an ECU 30 in the third embodiment. The endurance test result of activated carbon is shown. FIG. 3 is a diagram showing a temperature distribution of the radiator 14. FIG. 10 is a diagram for illustrating control in a fourth embodiment. It is a figure which shows the structure of the vehicle carrying the air purification apparatus of Embodiment 5. FIG. FIG. 3 is a diagram showing a temperature distribution of the radiator 14. FIG. 10 is a diagram for illustrating control in a fifth embodiment. FIG. 20 is a diagram for describing control in the sixth embodiment. 14 is a flowchart showing fan rotation speed ratio adjustment control executed by ECU 30 in the sixth embodiment. It is an example of the characteristic map which showed the relationship between cooling water temperature and rotation speed ratio. FIG. 20 is a diagram for illustrating control in a seventh embodiment. 14 is a flowchart showing shutter lowering degree adjustment control executed by ECU 30 in the seventh embodiment. It is an example of the characteristic map which showed the relationship between the fall degree of the grill shutter 22, and cooling water temperature.

Embodiment 1 FIG.
[Configuration of air purification device for vehicle]
First, Embodiment 1 of the present invention will be described with reference to FIGS. FIG. 1 is a diagram illustrating a configuration of a vehicle on which the air purification device of the present embodiment is mounted. A vehicle 10 shown in FIG. 1 includes an internal combustion engine 12 as a power unit. The exhaust gas discharged from the internal combustion engine 12 contains HC and NOx. Ozone is generated by a photochemical reaction using HC or NOx as a reactant. Therefore, by mounting an air purification device on the vehicle 10 and purifying ozone in the air while the vehicle 10 is traveling, the influence of the vehicle 10 on the environment can be reduced.

  In the vehicle 10, a radiator 14 that cools cooling water to be circulated through the internal combustion engine 12 is disposed in front of the internal combustion engine 12. An ozone purifier having a function of purifying ozone is carried on the core portion of the radiator 14. Examples of the ozone purifier include metal oxides such as manganese dioxide, and porous materials such as activated carbon and zeolite. In addition to metal oxides and porous materials, simple metals such as manganese, iron, cobalt, nickel, copper, ruthenium, rhodium, palladium, silver, platinum or gold, metal complexes and organic metals centered on these single metals The thing using a complex can also be used.

  Two radiator fans 16 and 18 are attached to the rear of the radiator 14. FIG. 2 is a front view of the radiator 14 of FIG. As shown by a broken line in FIG. 2, two radiator fans 16 and 18 are arranged in parallel behind the radiator 14. When the radiator fans 16 and 18 are rotated, the atmosphere in front of the radiator 14 is sucked out to the internal combustion engine 12 side.

  The vehicle 10 also includes an ECU (Electronic Control Unit) 30 as a control device. The radiator fans 16 and 18 described above are connected to the output side of the ECU 30. Further, a thermostat (not shown) that permits or prohibits the flow of cooling water to the radiator 14 by opening and closing thereof is connected to the input side of the ECU 30.

[Ventilation characteristics test of radiator]
Next, the ventilation characteristic test conducted by the present inventors will be described with reference to FIGS. This ventilation characteristic test is performed by measuring the speed of the traveling wind passing through the radiator 14 (hereinafter referred to as “radiator passing wind speed”) while the vehicle is traveling. The measurement of the wind speed passing through the radiator was performed by dividing the radiator 14 into six regions. FIG. 3 is a front view of the radiator 14 of FIG. 2 and shows the six divided regions (wspd_1 to 6). In this ventilation characteristic test, the vehicle was driven in the normal mode. That is, the cooling water flow to the radiator 14 and the operation of the radiator fans 16 and 18 were appropriately performed based on the driving state of the vehicle.

  FIG. 4 is a diagram showing the results of a ventilation characteristic test. As shown in FIG. 4, in the low engine speed and the low vehicle speed range, the radiator passing wind speed shows the same value in any divided region. However, there is a difference between regions in the radiator passing wind speed as the engine speed and the vehicle speed increase. And it became clear that the difference between these areas becomes remarkable in the high engine speed and the high vehicle speed range. This result is considered to be due to the control method of the radiator fans 16 and 18 and the mounting position thereof. That is, when the radiator fans 16 and 18 are controlled, the amount of air passing through the radiator increases. However, when these fans are arranged in parallel as shown in FIG. 2, the wind flow in the intermediate region (wspd_2, 5) is reduced. This is considered to be the difference between the above regions.

  FIG. 5 is a graph showing the ozone purification rate before and after the ventilation characteristic test. The horizontal axis of FIG. 5 shows the radiator passing wind speed, and the vertical axis shows the ozone purification rate. The ozone purification rate is calculated by separately measuring the ozone concentrations before and after the radiator 14 and using these measured values (ozone purification rate = rear ozone concentration / forward ozone concentration). As shown in FIG. 5, the six divided regions could be classified into three groups depending on the degree of decrease in the ozone purification rate after durability. That is, in the first group (wspd_2, 5), the degree of decrease in the ozone purification rate was the smallest, and the degree of decrease was increased in the order of the second group (wspd_1, 3) and the third group (wspd_4, 6). That is, it became clear that the ozone purification rate distribution was non-uniform.

  The cause of the non-uniformity of the ozone purification rate is none other than the non-uniformity of the distribution of traveling wind passing through the radiator 14. This is because the ozone purifier is deteriorated by a deterioration factor contained in the atmosphere. If the running wind distribution is not uniform, the ozone purification function in the region where the deterioration factor is concentrated is different from that in other regions. This is because a partial deterioration which is extremely deteriorated as compared with that occurs. Therefore, in the present embodiment, the rotation of the radiator fans 16 and 18 is performed in order to eliminate the inter-regional difference in the accumulated amount of traveling wind that passes through the ozone purifier (hereinafter referred to as “passed air amount integrated value”). The fan rotation speed adjustment control for adjusting the number is executed.

[Control in Embodiment 1]
The fan rotation speed adjustment control is to shift the cycle of a series of operations between the radiator fans 16 and 18 (for example, shift half a cycle) while continuously changing the rotation speed of the radiator fans 16 and 18. This fan rotation speed adjustment control will be described with reference to FIG. FIG. 6A is a diagram showing an image of the fan rotation speed during the normal control. FIG. 6B is a diagram illustrating an image of the fan rotation speed during the fan rotation speed adjustment control.

  The area of the circle shown in FIG. 6 represents the rotation speed (rotation speed) of the fan, and the larger the area of the circle, the higher the speed (high rotation speed). Further, the “integrated value” shown in FIG. 6 means a passing air amount integrated value. As shown in FIG. 6 (A), during normal control, the rotational speeds of the radiator fans 16 and 18 are equal, so the distribution of the traveling wind passing through the radiator 14 becomes non-uniform, and there is a difference between regions in the integrated amount of passing air. Will occur. On the other hand, as shown in FIG. 6B, during the fan rotation speed adjustment control, the inter-regional difference of the passing air amount integrated value can be eliminated. Therefore, since the ozone purification rate on the surface of the radiator 14 can be flattened, partial deterioration of the ozone purifier can be prevented in advance. Therefore, it is possible to extend the life of the purification function of the radiator 14.

  By the way, in this embodiment, although the fan rotation speed adjustment control was performed using the two radiators of the radiator fans 16 and 18, it is also possible to increase the number of radiator fans to three or more and execute the same control. It is. By increasing the number of radiator fans to 3 or more, there may be a case where the inter-regional difference of the passing air amount integrated value can be effectively eliminated. That is, the number of radiator fans can be changed as appropriate according to the degree of demand for flattening the ozone purification rate. Note that this modification can also be applied to the embodiments described later.

  Further, the fan rotation speed adjustment control of the present embodiment can also be applied to an ozone purifier carried on a vehicle component other than the radiator 14. For example, an intercooler mounted on, for example, a fuel cell vehicle is generally provided at a location where an air flow path is formed while the vehicle is running, and a back surface of the intercooler is provided to improve the cooling performance of compressed air. An intercooler fan is attached to Therefore, if the ozone purifier is carried on the core portion of the intercooler and the rotational speed of the intercooler fan is adjusted in the same manner as in this embodiment, the same effect as in this embodiment can be obtained. Note that this modification can also be applied to Embodiments 2 and 3 described later.

In the first embodiment, the radiator 14 corresponds to the “vehicle component” in the first invention, and the radiator fans 16 and 18 correspond to the “passing air distribution adjusting means” in the first invention. .
In the first embodiment, the “purification rate distribution uniformizing means” in the first aspect of the present invention is realized by executing the above-described fan rotation speed adjustment control.

Embodiment 2. FIG.
Next, a second embodiment of the present invention will be described with reference to FIGS. The air purification apparatus according to the present embodiment is characterized in that the fan rotation speed control routine shown in FIG. 8 is executed in the configuration in which ozone concentration sensors are added in front of the radiator 14 and the rear of the radiator fan 16 in FIG. . For this reason, description of the device configuration is omitted. In the following description, the ozone concentration sensor in front of the radiator 14 is referred to as a front O ₃ sensor, and the ozone concentration sensor in the rear of the radiator fan 16 is referred to as a rear O ₃ sensor. It is assumed that the front O ₃ sensor and the rear O ₃ sensor are connected to the input side of the ECU 30 in FIG.

[Control in Embodiment 2]
In the first embodiment, control is performed to shift the cycle of a series of operations between the radiator fans 16 and 18 while continuously changing the rotational speed of the radiator fans 16 and 18. However, the radiator fans 16 and 18 are originally mounted for the purpose of improving the cooling efficiency of the cooling water flowing through the radiator 14. Therefore, when the control of the first embodiment is always performed, the cooling water may be insufficiently cooled.

Therefore, in the present embodiment, the normal control is executed when there is a cooling request for the cooling water, and the fan rotation speed adjustment control is executed when it is necessary to equalize the accumulated air amount. FIG. 7 is a diagram for explaining fan rotation speed control in the present embodiment. The travel distance td shown in FIG. 7 is the cumulative travel distance from when the radiator 14 carrying the unused ozone purifier is mounted on the vehicle, and the ozone purification rate is determined by the front O ₃ sensor and the rear O ₃ sensor. It is calculated using the detected ozone concentration (ozone purification rate = rear O ₃ sensor detected concentration / front O ₃ sensor detected concentration).

As shown in FIG. 7, the present embodiment is based on the execution of normal control. As described in the first embodiment, when the vehicle travels in the normal mode, most of the traveling wind passes through a specific region (wspd_1, 3, 4, 6 in FIG. 3). Here, since the rear O ₃ sensor is installed behind the radiator fan 16, the rear O ₃ sensor passes through the area in front of the radiator fan 16 (wspd_1, 4 in FIG. 3) in the specific area. Mainly detects the ozone concentration in the atmosphere. Therefore, the ozone purification rate decreases with the deterioration of the ozone purifier in the region during normal control.

Further, as shown in FIG. 7, in the present embodiment, when the ozone purification rate decreases to the threshold value a (when the travel distance reaches td ₁ ), the execution of the normal control is stopped and the fan rotation speed adjustment is performed. Execute control. It should be noted that it is confirmed that there is no cooling request when the fan rotation speed adjustment control is executed. When the fan rotation speed adjustment control is executed, the ozone purifier in the region (wspd_2, 5 in FIG. 3) in which almost no air passes during normal control starts to function. Therefore, the rear O ₃ sensor detects the ozone concentration in the atmosphere that has passed through the region. Therefore, during the fan rotation speed adjustment control, the ozone purification rate starts to increase and gradually decreases after reaching a peak. The reason why the ozone purification rate gradually decreases after the peak is due to the deterioration of the ozone purifier in the region.

Further, as shown in FIG. 7, in this embodiment, it is confirmed that the ozone purification rate has increased to a value higher than the threshold value d (> threshold value a) (when the travel distance reaches td ₂ ). , The execution of the fan rotation speed adjustment control is stopped, and the normal control is executed again. During normal control, the rear O ₃ sensor mainly detects the ozone concentration in the atmosphere that has passed through a specific region (wspd_1, 4 in FIG. 3). Will drop.

Further, as shown in FIG. 7, in the present embodiment, the second fan rotation speed adjustment control is executed when the ozone purification rate decreases again to the threshold value a (when the travel distance reaches td ₃ ). . Further, when it is confirmed that the ozone purification rate has increased again to a value higher than the threshold value d (when the travel distance reaches td ₄ ), the execution of the fan rotation speed adjustment control is stopped and the third normal Execute control. In this way, when the decrease in the ozone purification rate is detected, switching from the normal control to the fan rotation speed adjustment control makes it possible to flatten the ozone purification rate with high accuracy. That is, high robustness can be ensured.

[Specific Processing in Second Embodiment]
Next, specific processing for realizing the above-described functions will be described with reference to FIG. FIG. 8 is a flowchart showing fan rotation speed control executed by the ECU 30 in the present embodiment. Note that the routine shown in FIG. 8 is repeatedly executed periodically.

In the routine shown in FIG. 8, first, the ECU 30 determines whether or not the ozone purification rate is lower than the threshold value a (step 100). In this step, the ozone purification rate is a value calculated using the detection values of the front O ₃ sensor and the rear O ₃ sensor, and the threshold value a is the threshold value described in FIG. Is used.

  If it is determined in step 100 that the ozone purification rate is equal to or greater than the threshold value a, it can be determined that it is not necessary to execute the fan rotation speed adjustment control at the present time. Therefore, the ECU 30 executes normal control (step 110). On the other hand, when it is determined that the ozone purification rate is lower than the threshold value a, it is highly possible that the ozone purification body carried on the radiator 14 is partially deteriorated and the difference in the ozone purification rate between the regions is increased. I can judge. Therefore, the ECU 30 determines whether or not the cooling water temperature is lower than the threshold value b (step 120). In this step, a value detected by the water temperature sensor 26 is used as the cooling water temperature, and a value separately calculated in the ECU 30 in response to a cooling request for the internal combustion engine 12 is used as the threshold value b.

  If it is determined in step 120 that the cooling water temperature is equal to or higher than the threshold value b, it can be determined that priority should be given to the cooling request for the cooling water. Therefore, the ECU 30 proceeds to step 110 and executes normal control. On the other hand, if it is determined that the cooling water temperature is lower than the threshold value b, it is determined whether the number of executions of the fan rotation speed adjustment control is less than the threshold value c (step 130). In this step, the number of executions of the fan rotation speed adjustment control uses a numerical value of a control number counter separately provided in the ECU 30. Further, the threshold value c is determined in advance based on a series of operation cycles when continuously changing the rotational speed of the radiator fans 16 and 18, and a value stored in advance in the ECU 30 is used.

  If it is determined in step 130 that the number of executions of the fan rotation speed adjustment control is greater than or equal to the threshold value c, the ECU 30 proceeds to step 110 and executes normal control. On the other hand, when it is determined in step 130 that the number of executions of the fan rotation speed adjustment control is less than the threshold value c, the ECU 30 executes the fan rotation speed adjustment control (step 140).

Following step 140, the ECU 30 determines whether or not the ozone purification rate is higher than a threshold value d (step 150). In this step, the ozone purification rate is a value calculated using detection values of the front O ₃ sensor and the rear O ₃ sensor, and the threshold value d is the threshold value described in FIG. Is used.

  If it is determined in step 150 that the ozone purification rate is equal to or less than the threshold value d, it can be determined that the fan rotation speed adjustment control needs to be continuously executed. Therefore, the ECU 30 counts the number of executions of the control counter (step 160) and returns to step 130. On the other hand, if it is determined in step 150 that the ozone purification rate is higher than the threshold value d, it can be determined that the area that was substantially unused during normal control functions and the ozone purification rate has recovered. Therefore, the ECU 30 resets the control counter (step 170) and ends this routine.

  As described above, according to the routine shown in FIG. 8, the normal control is executed when the ozone purification rate is determined to be equal to or higher than the threshold value a or when the cooling water temperature is determined to be equal to or higher than the threshold value b. Priority can be given to cooling requirements for water. Further, according to the routine shown in FIG. 8, when it is determined that the number of executions of the fan rotation speed adjustment control is less than the threshold value c, or when it is determined that the ozone purification rate is equal to or less than the threshold value d, the fan Since the rotation speed adjustment control is executed, the difference between the areas of the accumulated air amount generated during the normal control can be eliminated with high accuracy.

  By the way, in this embodiment, although the threshold value a and the threshold value d were demonstrated as a fixed value, it is not necessary to necessarily use a fixed value, For example, you may correct | amend these threshold values according to a vehicle travel distance. In this case, for example, a characteristic map that defines the relationship between the threshold value a and the threshold value d and the vehicle travel distance is stored in advance in the ECU 30, and the threshold value corresponding to the vehicle travel distance at the processing start timing of the routine of FIG. It is only necessary to execute the processing of step 100 and step 150 after updating to a and threshold d.

In the second embodiment, the “purification rate distribution acquisition means” in the second aspect of the present invention is realized by the ECU 30 executing the processing of step 100 or step 150 of FIG.
In the second embodiment, the “mode switching means” according to the fourth aspect of the present invention is realized by the ECU 30 executing the processing of steps 110 to 140 in FIG. 8.

Embodiment 3 FIG.
Next, Embodiment 3 of the present invention will be described with reference to FIGS. The air purification apparatus of this embodiment is characterized in that the fan rotational speed control routine shown in FIG. 13 is executed in the configuration of FIG. For this reason, description of the device configuration is omitted.

[Control in Embodiment 3]
In the second embodiment, the ozone purification rate is calculated using the front O ₃ sensor and the rear O ₃ sensor. However, the ozone concentration in the atmosphere is generally low, and it is necessary to use a highly accurate sensor in order to detect the ozone concentration around the radiator 14. Therefore, when such a high-precision sensor is used, an increase in apparatus cost becomes a problem. Moreover, the problem of mounting restrictions also arises. Therefore, in this embodiment, the deterioration state (deterioration rate) of the ozone purifier is estimated, and the fan rotation speed adjustment control is executed based on the estimated deterioration state.

  The deterioration state of the ozone purifier has a correlation with the total contact amount of the deterioration factor substances in contact with the ozone purifier (hereinafter referred to as “total factor substance amount”). FIG. 9 is a diagram showing the relationship between the deterioration rate of the ozone purifier and the total amount of causative substances. As shown in FIG. 9, the deterioration rate of the ozone purifier increases as the total amount of the factor substances increases. Therefore, if the total amount of the causative substance can be calculated, the deterioration state of the ozone purifier can be estimated.

The total amount of the causative substance can be estimated from the total amount of traveling wind passing through the radiator 14. The total amount of traveling wind passing through the radiator 14 can be calculated by multiplying the time integral value of the radiator passing wind speed by the cross-sectional area of the radiator 14. Here, the radiator passing wind speed can be obtained from the voltage V applied to the radiator fan and the vehicle speed. FIG. 10 is a diagram showing the relationship between the voltage V applied to the radiator fan and the vehicle speed, and the radiator passing wind speed. The magnitude relationship of the applied voltage V shown in FIG. 10 is V ₀ (= 0 V), V ₁ , V ₂ , V ₃ in order from the lowest. As shown in FIG. 10, the radiator passing wind speed increases as the applied voltage V increases at a low speed, and becomes substantially constant regardless of the applied voltage V at a high speed. In the present embodiment, the radiator passing wind speed is obtained based on the relationship shown in FIG.

  By the way, the deterioration factor substance does not always deteriorate the ozone purifier. This is because even if the traveling wind comes into contact with the ozone purifying body, the deterioration factor contained in the traveling wind does not always adhere to the ozone purifying body. Moreover, it is necessary to consider the case where the deterioration factor substance adhering to the ozone purifier is detached by the traveling wind.

  FIG. 11 is a diagram showing the relationship between the vehicle travel distance and the ozone purification rate for each vehicle speed. As shown in FIG. 11, when the vehicle travels constantly at 50 km / h, the degree of decrease in the ozone purification rate is greater than when it travels constantly at 100 km / h. That is, when the vehicle travels at a low speed, the degree of decrease in the ozone purification rate is greater than when the vehicle travels at a high speed. It can be said that this relationship supports that the deterioration factor substance cannot adhere to the ozone purifier when traveling at high speed, or that it is peeled off by the traveling wind immediately after adhesion.

  In this embodiment, based on the relationship of FIG. 11, the travel air volume passing through the radiator is multiplied by a correction coefficient related to the probability that the degradation factor substance contacts the ozone purifier (hereinafter referred to as “purifier contact probability”). Above, the total amount of causative substances is obtained. FIG. 12 is a diagram showing the relationship between the purifier contact probability and the radiator passing wind speed. In this embodiment, the correction coefficient regarding the purifier contact probability is set based on the relationship shown in FIG.

  In the present embodiment, the total amount of the causative substance is estimated for each area described in FIG. 3, and the difference between the areas (for example, the difference in the total quantity of causative substance in wspd_2 and 4 in FIG. 3) is the set amount (threshold value f). If it becomes larger than this, fan rotation speed adjustment control is executed. Therefore, the same effect as in the second embodiment can be obtained. In addition, since the sensor of the second embodiment can be omitted, the apparatus cost can be suppressed.

[Specific Processing in Embodiment 3]
Next, specific processing for realizing the above-described functions will be described with reference to FIG. FIG. 13 is a flowchart showing fan rotation speed control executed by the ECU 30 in the present embodiment. Note that the routine shown in FIG. 13 is repeatedly executed periodically.

  In the routine shown in FIG. 13, first, the ECU 30 determines whether or not the concentration of the deterioration factor substance in the atmosphere is higher than the threshold value e (step 200). In this step, the ECU 30 acquires the concentration of the deterioration factor substance in the travel area from a car navigation system or the like separately mounted on the vehicle, and compares it with the threshold value e. The threshold e is set in advance as the concentration of the deterioration factor substance that can allow the ozone purifier to deteriorate, and a value stored in the ECU 30 is used.

  If it is determined in step 200 that the concentration of the deterioration factor substance is higher than the threshold value e, the ECU 30 proceeds to step 210. On the other hand, if it is determined in step 200 that the concentration of the deterioration factor substance is equal to or less than the threshold value e, it can be determined that it is not necessary to execute the fan speed control itself. Therefore, the ECU 30 ends this routine.

  In step 210, the ECU 30 determines whether or not the difference between the areas of the total amount of the factor substance is larger than the threshold value f. In this step, the total amount of the causative substance and the difference between the areas are estimated by the method described above. The threshold value f is set in advance and a value stored in the ECU 30 is used.

  If it is determined in step 210 that the difference between the areas of the total amount of the causative substance is equal to or less than the threshold value f, it can be determined that it is not necessary to execute the fan speed adjustment control at the present time. Therefore, the ECU 30 performs normal control (step 220). On the other hand, when it is determined that the difference between the areas of the total amount of the factor substance is larger than the threshold value f, the ECU 30 determines whether or not the cooling water temperature is lower than the threshold value b (step 230). The processing in steps 230 to 250 is the same as the processing in steps 120 to 140 in FIG.

  Subsequent to step 250, the ECU 30 determines whether or not the difference between the areas of the total amount of the factor substance is smaller than a threshold value g (<threshold value f) (step 260). In this step, the total amount of the causative substance and the difference between the areas are estimated by the method described above. Further, the threshold value g is set in advance and a value stored in the ECU 30 is used.

  When it is determined in step 260 that the difference between the areas of the total amount of the causative substance is greater than or equal to the threshold value g, it can be determined that it is necessary to continue to perform fan rotation speed adjustment control. Therefore, the ECU 30 counts the number of executions of the control counter (step 270) and returns to step 240. On the other hand, if it is determined in step 260 that the difference between the areas of the total amount of the causative substance is smaller than the threshold value g, it can be determined that the area that has not been used during normal control functions and the ozone purification rate has recovered. . Therefore, the ECU 30 resets the control counter (step 280) and ends this routine.

  As described above, according to the routine shown in FIG. 13, the same effect as the routine process of FIG. 8 can be obtained by using the difference between the areas of the total amount of the factor substance.

In the third embodiment, the “purification rate distribution obtaining unit” in the second aspect of the present invention is realized by the ECU 30 executing the processing of step 210 or step 260 of FIG.
In the third embodiment, the “mode switching means” according to the fourth aspect of the present invention is implemented when the ECU 30 executes the processing of steps 220 to 250 in FIG.

Embodiment 4 FIG.
Next, a fourth embodiment of the present invention will be described with reference to FIGS. The present embodiment is characterized in that the fan speed ratio change control shown in FIG. 16 is executed in a configuration in which the ozone purifier includes activated carbon. Since the ozone purifier has the same configuration as that of FIG. 1 except that the activated carbon is essential, the description of the device configuration is omitted.

  Activated carbon has an ozone purification performance comparable to that of metal oxides such as manganese dioxide, and is available at low cost, and therefore is promising as an ozone purifier. Moreover, since activated carbon can purify ozone not only in the water flow temperature range (usually about 80 ° C.) to the radiator 14 but also in the normal temperature (25 ° C.) range, the above-described operation requires a high purification temperature of about 80 ° C. or higher. Useful compared to metal oxides.

  However, activated carbon has a problem that it easily deteriorates depending on the bed temperature during ozone purification. This problem will be described with reference to FIG. FIG. 14 shows the durability test result of activated carbon. This endurance test was conducted by measuring the ozone concentration before and after activated carbon while blowing high and low temperature ozone-containing gas on activated carbon having different bed temperatures (25 ° C. and 75 ° C.). . FIG. 14A shows the results when the high-temperature ozone-containing gas is sprayed, and FIG. 14B shows the results when the low-temperature ozone-containing gas is sprayed.

  As shown in FIGS. 14 (A) and 14 (B), the ozone purification rate tends to be different depending on whether the bed temperature of the activated carbon is 25 ° C. or 75 ° C. Specifically, when the bed temperature of the activated carbon is 75 ° C., it greatly decreases as the durability distance increases. On the other hand, when the bed temperature of the activated carbon is 25 ° C., the ozone purification rate maintains a high value even after a 20 kilomile endurance run.

  FIG. 15 is a diagram showing the temperature distribution of the radiator 14. As shown in FIG. 15, when the internal flow path of the radiator 14 is formed from left to right, the bed temperature of the activated carbon is high in the left region of the radiator 14 and low in the right region. Therefore, in the present embodiment, fan speed ratio change control for changing the speed ratio of the radiator fans 16 and 18 during the passage of cooling water is executed. In the present embodiment, the flow of cooling water is determined by the open / closed state of a thermostat provided in the cooling water channel. Specifically, when the thermostat is open, it is determined that the cooling water is passing through.

[Control in Embodiment 4]
The fan speed ratio change control will be described with reference to FIG. The area of the circle shown in FIG. 16 represents the rotational speed of the fan, and the larger the area of the circle, the higher the rotational speed. As shown in FIG. 16, during the fan speed ratio change control, the radiator fan 18 is set to a high speed and the radiator fan 16 is set to a low speed. Thereby, the ventilation volume in the upstream area of an internal channel can be reduced, and the ventilation volume in the downstream area can be increased. Therefore, the ozone purification body in the downstream area of the internal flow path can be actively used to promote ozone purification, and the ozone purification in the upstream area can be suppressed. Moreover, since the ozone purification rate can be flattened, partial deterioration of the ozone purifier can be prevented beforehand. Therefore, it is possible to extend the life of the purification function of the radiator 14.

  In the fourth embodiment, the “passing air amount adjusting means” according to the sixth aspect of the present invention is realized by executing the above-described fan rotational speed ratio change control.

Embodiment 5 FIG.
Next, Embodiment 5 of the present invention will be described with reference to FIGS. This embodiment is characterized in that the shutter lowering degree change control shown in FIG. 19 is executed in the configuration of FIG. The point that the ozone purifier contains activated carbon is the same as that in the fourth embodiment.

[Configuration of air purification device for vehicle]
FIG. 17 is a diagram illustrating a configuration of a vehicle on which the air purification device of the present embodiment is mounted. In the vehicle 10, an electric grill shutter 22 configured to be opened and closed in the vertical direction is disposed between the radiator 14 and the bumper grill 20. It is assumed that grille shutter 22 is connected to the output side of ECU 30 in FIG.

  The grill shutter 22 is normally housed in the bumper grill 20. When the grill shutter 22 is in the retracted state, the bumper grill 20 is in an open state, and the interior and exterior of the vehicle 10 communicate with each other. Therefore, when the vehicle 10 travels, outside air is taken in from the front of the bumper grill 20, passes through the radiator 14, and is discharged rearward. On the other hand, when the stored state of the grill shutter 22 is released and lowered, the ventilation area of the bumper grill 20 decreases.

[Control in Embodiment 5]
As described in the fourth embodiment, the activated carbon has a problem that it easily deteriorates depending on the bed temperature during the ozone purification. For this reason, in the fourth embodiment, the fan rotation speed ratio change control is performed to change the rotation speed ratio of the radiator fans 16 and 18 during the flow of the cooling water. This fan rotation speed ratio change control is particularly effective when the radiator 14 in which the internal flow path is formed in the left-right direction is used.

  In the present embodiment, particularly effective control is executed when the radiator 14 in which the internal flow path is formed in the vertical direction is used. FIG. 18 is a view showing the temperature distribution of the radiator 14. As shown in FIG. 18, when the internal flow path of the radiator 14 is formed from above to below, the bed temperature of the activated carbon is high in the upper region of the radiator 14 and lower in the lower region. Therefore, in the present embodiment, the shutter lowering degree change control for changing the lowering degree of the grille shutter 22 during the passage of the cooling water is executed. In the present embodiment, the flow of the cooling water is determined by the open / close state of the thermostat provided in the cooling water channel, as in the fourth embodiment.

  The shutter lowering degree change control will be described with reference to FIG. If the lowering degree of the grille shutter 22 is increased, the ventilation area of the opening 20a of the bumper grill 20 can be reduced. Thereby, the ventilation volume in the upstream area of an internal channel can be reduced, and the ventilation volume in the downstream area can be increased. Therefore, if the shutter lowering degree change control is executed, ozone purification can be promoted by actively utilizing the ozone purifier in the downstream area of the internal flow path, and ozone purification in the upstream area can be suppressed. Therefore, the same effect as in the fourth embodiment can be obtained.

  By the way, in the said Embodiment 4 and this embodiment, the method of controlling the actuators, such as the radiator fans 16 and 18 and the grille shutter 22, and changing a ventilation amount was demonstrated. However, the method for changing the air flow rate is not limited to the contents disclosed in these embodiments. That is, any actuator control method that increases the air flow rate in the low temperature region as compared with the air flow rate in the high temperature region can be said to be within the scope of the modifications of these embodiments.

  In the fifth embodiment, the “passing air amount adjusting means” according to the sixth aspect of the present invention is realized by executing the shutter lowering degree change control described above.

Embodiment 6 FIG.
Next, a sixth embodiment of the present invention will be described with reference to FIGS. The air purification apparatus according to the present embodiment has a configuration in which a water temperature sensor for detecting the cooling water temperature is added near the cooling water inlet of the radiator 14 in FIG. Its features. For this reason, description of the device configuration is omitted. It is assumed that the water temperature sensor is connected to the input side of the ECU 30 in FIG. In addition, the internal flow path of the radiator 14 of the present embodiment is formed from the left to the right as in the fourth embodiment.

[Control in Embodiment 6]
In the fan rotation speed ratio changing control of the fourth embodiment, when the thermostat provided in the cooling water channel is being opened, it is determined that the cooling water is flowing. Here, the thermostat is opened when the cooling water temperature rises to a set temperature (for example, 60 ° C.) or higher. For this reason, a situation in which cooling water having a temperature higher than the set temperature flows into the internal flow path of the radiator 14 naturally occurs while the thermostat is opened. For example, during traveling under a high load, cooling water at a very high temperature (for example, 80 ° C.) flows into the internal flow path, so that the temperature of the cooling water flowing in the downstream region may still be high. Therefore, in the present embodiment, fan rotational speed ratio adjustment control for finely adjusting the rotational speed ratio of the radiator fans 16 and 18 using the detected value of the water temperature sensor (that is, the cooling water temperature immediately before flowing into the radiator 14). Trying to do.

  The fan rotation speed ratio adjustment control in this embodiment will be described with reference to FIG. The area of the circle shown in FIG. 20 represents the rotation speed of the fan, and the larger the circle area, the higher the rotation speed state. During the fan speed ratio adjustment control, the radiator fan 18 is set to a high speed and the radiator fan 16 is set to a low speed.

  However, as shown in FIG. 20A, when the cooling water temperature is relatively low (for example, around 60 ° C.), the bed temperature of the activated carbon becomes a medium temperature in the left region of the radiator 14. Therefore, the rotational speed ratio is adjusted so that the rotational speed of the radiator fan 16 is slightly lower than the rotational speed of the radiator fan 18. Thereby, the ventilation volume in the downstream area of an internal channel can be increased, and the ventilation volume in the upstream area can be made moderate. As shown in FIG. 20B, when the cooling water temperature is high (for example, around 80 ° C.), the bed temperature of the activated carbon becomes high in the left region of the radiator 14. Therefore, the rotation speed ratio is adjusted so that the rotation speed of the radiator fan 16 is extremely lower than the rotation speed of the radiator fan 18. Thereby, the ventilation volume in the downstream area of an internal channel can be increased, and the ventilation volume in the upstream area can be decreased extremely. Therefore, since the amount of ventilation in each region can be finely adjusted, the ozone purification rate can be flattened with high accuracy. It is assumed that the ECU 30 stores in advance a characteristic map showing the relationship between the coolant temperature and the rotation speed ratio.

[Specific Processing in Embodiment 6]
Next, specific processing for realizing the above-described functions will be described with reference to FIG. FIG. 21 is a flowchart showing fan rotation speed ratio adjustment control executed by the ECU 30 in the present embodiment. Note that the routine shown in FIG. 21 is executed periodically and repeatedly.

  In the routine shown in FIG. 21, first, the ECU 30 executes normal control (step 300), and determines whether or not the thermostat is open (step 310). If it is determined in step 310 that the thermostat is open, it can be determined that the cooling water temperature has risen to a set temperature (for example, 60 ° C.) or higher, and thus the ECU 30 acquires the detection value of the water temperature sensor. (Step 320). On the other hand, when it is determined that the thermostat is closed, the ECU 30 ends this routine.

  Subsequent to step 320, the ECU 30 determines the rotational speed ratio of the radiator fans 16 and 18 (the rotational speed of the radiator fan 18 / the rotational speed of the radiator fan 16) (step 330). FIG. 22 is an example of a characteristic map showing the relationship between the cooling water temperature and the rotation speed ratio. In this step, for example, the rotation speed ratio is determined by applying the detected value of the water temperature sensor acquired in step 320 to the characteristic map shown in FIG. Then, the ECU 30 rotates the radiator fans 16 and 18 at the determined rotation speed ratio.

  As described above, according to the routine shown in FIG. 21, the rotation speed ratio of the radiator fans 16 and 18 can be finely adjusted according to the acquired cooling water temperature. Therefore, since the amount of ventilation in each region can be finely adjusted, the ozone purification rate can be flattened with high accuracy.

  In the sixth embodiment, the “temperature distribution acquisition means” according to the seventh aspect of the present invention is implemented when the ECU 30 executes the process of step 320 in FIG.

Embodiment 7 FIG.
Next, Embodiment 7 of the present invention will be described with reference to FIGS. The air purifying apparatus according to the present embodiment is characterized in that the shutter lowering degree adjustment control shown in FIG. 24 is executed in a configuration in which a water temperature sensor for detecting the cooling water temperature is added near the cooling water inlet of the radiator 14 in FIG. Features. For this reason, description of the device configuration is omitted. It is assumed that the water temperature sensor is connected to the input side of the ECU 30 in FIG. Moreover, the internal flow path of the radiator 14 of this embodiment shall be formed from upper direction to the downward direction like the said Embodiment 5. FIG.

[Control in Embodiment 7]
In the present embodiment, the detection value of the water temperature sensor is used as in the sixth embodiment. Specifically, in the shutter lowering degree adjustment control of the present embodiment, the lowering degree of the grille shutter 22 is finely adjusted using the detection value of the water temperature sensor.

  The shutter lowering degree adjustment control in the present embodiment will be described with reference to FIG. As shown in FIG. 23A, when the cooling water temperature is relatively low (for example, around 60 ° C.), the bed temperature of the activated carbon is also medium in the region above the radiator 14. Therefore, the lowering degree of the grill shutter 22 is reduced. Thereby, the ventilation volume in the downstream area of an internal channel can be increased, and the ventilation volume in the upstream area can be made moderate. Further, as shown in FIG. 23B, when the cooling water temperature is high (for example, around 80 ° C.), the bed temperature of the activated carbon is also high in the region above the radiator 14. For this reason, the lowering degree of the grill shutter 22 is increased. Thereby, the ventilation volume in the downstream area of an internal channel can be increased, and the ventilation volume in the upstream area can be decreased extremely. Therefore, the same effect as in the sixth embodiment can be obtained. It is assumed that the ECU 30 stores in advance a characteristic map showing the relationship between the degree of lowering of the grill shutter 22 and the coolant temperature.

[Specific Processing in Embodiment 7]
Next, specific processing for realizing the above-described function will be described with reference to FIG. FIG. 24 is a flowchart showing the shutter lowering degree adjustment control executed by the ECU 30 in the present embodiment. Note that the routine shown in FIG. 24 is repeatedly executed periodically.

  In the routine shown in FIG. 24, the ECU 30 executes the processes of steps 400 to 420. Steps 400 to 420 are the same as steps 300 to 320 in FIG. Following step 420, the ECU 30 determines the lowering degree of the grill shutter 22 (step 430). FIG. 25 is an example of a characteristic map showing the relationship between the lowering degree of the grill shutter 22 and the cooling water temperature. In this step, for example, the detection value of the water temperature sensor acquired in step 420 is applied to the characteristic map shown in FIG. Then, the ECU 30 drives the grill shutter 22 so as to achieve the determined lowering degree.

  As described above, according to the routine shown in FIG. 24, the lowering degree of the grille shutter 22 can be finely adjusted according to the acquired cooling water temperature. Therefore, the same effect as in the sixth embodiment can be obtained.

  In the seventh embodiment, the “temperature distribution acquisition means” in the seventh aspect of the present invention is realized by the ECU 30 executing the process of step 420 in FIG.

DESCRIPTION OF SYMBOLS 10 Vehicle 12 Internal combustion engine 14 Radiator 16, 18 Radiator fan 20 Bumper grill 22 Grill shutter 30 ECU

Claims (10)

Vehicle components having an air passage surface through which air passes during vehicle travel;
An ozone purifier for purifying ozone provided in the vehicle component;
Passing air distribution adjusting means for adjusting the distribution of the passing air in the air passing surface direction;
Purification rate distribution equalizing means for controlling the passing air distribution adjusting means so as to equalize the ozone purification rate distribution in the air passage plane direction;
An air purification device for a vehicle, comprising: Purification rate distribution acquisition means for acquiring a distribution of ozone purification rate in the air passage plane direction;
The vehicle air purification device according to claim 1, wherein the purification rate distribution uniformizing means controls the passing air distribution adjusting means based on the obtained ozone purification rate distribution. The vehicle component is a radiator or an intercooler;
The passing air distribution adjusting means is a plurality of fans attached to the vehicle component;
The vehicle air purification according to claim 1 or 2, wherein the purification rate distribution uniformizing means uniformizes the ozone purification rate distribution by adjusting a rotation speed ratio of the plurality of fans. apparatus. The vehicle component is a radiator for passing cooling water,
The passing air distribution adjusting means is a plurality of fans attached to the vehicle component;
The purification rate distribution equalizing means continuously changes the rotation speed of each of the plurality of fans, and shifts a cycle of a series of operations between the plurality of fans. Provided with mode switching means for switching between the normal mode for equalizing each rotational speed,
The vehicle air purification apparatus according to any one of claims 1 to 3, wherein the mode switching means switches to the normal mode when cooling water flows into the radiator.   The vehicle air purification device according to any one of claims 1 to 4, wherein the ozone purifier includes at least one of activated carbon and manganese dioxide. The ozone purifier includes activated carbon,
The purification rate distribution uniformizing means controls the passing air distribution adjusting means so that more air passes through a low temperature region where the temperature of the ozone purifier is lower than a high temperature region where the temperature of the ozone purifier is high. The air purification device for a vehicle according to claim 1, further comprising a passing air amount adjusting means. A temperature distribution acquisition means for acquiring a temperature distribution of the ozone purifier in the air passage plane direction;
The vehicle air purification device according to claim 6, wherein the passing air amount adjusting means controls the passing air distribution adjusting means based on the acquired temperature distribution. The vehicle component is a radiator having an internal flow path through which cooling water flows.
The passing air distribution adjusting means is a plurality of fans attached to the radiator,
The passing air amount adjusting means adjusts the rotation speed ratio of the plurality of fans, thereby allowing the passage air volume adjusting means to adjust the downstream area of the internal flow path that is the low temperature area as compared to the upstream area of the internal flow path that is the high temperature area. The vehicle air purification device according to claim 6 or 7, wherein a large amount of air is allowed to pass through. The vehicle component is a radiator having an internal flow path through which cooling water flows.
The passing air distribution adjusting means is a grill shutter provided in front of the radiator and capable of adjusting an opening.
The passing air amount adjusting means adjusts the opening degree of the grille shutter so that the passage air amount adjusting means is more in the downstream area of the internal flow path that is the low temperature area than the upstream area of the internal flow path that is the high temperature area. The air purification device for a vehicle according to claim 6 or 7, wherein air is passed.   The vehicle air purification device according to any one of claims 6 to 9, wherein the ozone purifier includes manganese dioxide.

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