WO2013161012A1 - 車両用大気浄化装置 - Google Patents
車両用大気浄化装置 Download PDFInfo
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- WO2013161012A1 WO2013161012A1 PCT/JP2012/061021 JP2012061021W WO2013161012A1 WO 2013161012 A1 WO2013161012 A1 WO 2013161012A1 JP 2012061021 W JP2012061021 W JP 2012061021W WO 2013161012 A1 WO2013161012 A1 WO 2013161012A1
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- WIPO (PCT)
- Prior art keywords
- vehicle
- activated carbon
- ozone
- air
- radiator
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8671—Removing components of defined structure not provided for in B01D53/8603 - B01D53/8668
- B01D53/8675—Ozone
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L9/00—Disinfection, sterilisation or deodorisation of air
- A61L9/015—Disinfection, sterilisation or deodorisation of air using gaseous or vaporous substances, e.g. ozone
- A61L9/02—Disinfection, sterilisation or deodorisation of air using gaseous or vaporous substances, e.g. ozone using substances evaporated in the air by heating or combustion
- A61L9/03—Apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/102—Carbon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/10—Noble metals or compounds thereof
- B01D2255/102—Platinum group metals
- B01D2255/1025—Rhodium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/10—Noble metals or compounds thereof
- B01D2255/102—Platinum group metals
- B01D2255/1026—Ruthenium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/207—Transition metals
- B01D2255/2073—Manganese
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/207—Transition metals
- B01D2255/20738—Iron
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/207—Transition metals
- B01D2255/20746—Cobalt
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/207—Transition metals
- B01D2255/20753—Nickel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/207—Transition metals
- B01D2255/20761—Copper
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/45—Gas separation or purification devices adapted for specific applications
- B01D2259/455—Gas separation or purification devices adapted for specific applications for transportable use
- B01D2259/4558—Gas separation or purification devices adapted for specific applications for transportable use for being employed as mobile cleaners for ambient air, i.e. the earth's atmosphere
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/45—Gas separation or purification devices adapted for specific applications
- B01D2259/4566—Gas separation or purification devices adapted for specific applications for use in transportation means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/126—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element consisting of zig-zag shaped fins
- F28F1/128—Fins with openings, e.g. louvered fins
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2245/00—Coatings; Surface treatments
Definitions
- the present invention relates to a vehicle air purification device, and more particularly to a vehicle air purification device capable of purifying ozone in the atmosphere.
- Ozone which is the cause of photochemical smog
- Ozone 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.
- Patent Document 1 discloses such a DOR system in which a metal oxide such as manganese dioxide is supported on a vehicle component. This vehicle component is installed in a place where the vehicle is exposed to the atmosphere when the vehicle is running, and manganese dioxide has a function of converting ozone contained in the atmosphere into another substance such as oxygen and purifying it. Therefore, according to the DOR system of Patent Document 1, ozone in the atmosphere can be directly purified while the vehicle is traveling.
- a metal oxide such as manganese dioxide
- the present inventors have already made development focusing on the fact that active oxygen generated during ozonolysis of activated carbon is the main factor. Although the details will be described later, when briefly introduced, the active oxygen has an action of eliminating the ozone purification site of the activated carbon, and the probability that the active oxygen contacts the ozone purification site increases from the front to the rear of the vehicle. Based on such knowledge, the present inventors have reduced the amount of activated carbon coating from the front of the vehicle to the rear in the vehicle components, and an air purification device capable of suppressing deterioration of the ozone purification function of activated carbon due to active oxygen. We are developing.
- the coating amount adjustment based on the contact probability described above Showed the possibility of remaining uneasy about durability.
- an object of the present invention is to provide a DOR system capable of improving the durability of activated carbon as an ozone purifier.
- a first invention is a vehicle air purification apparatus,
- a vehicle comprising an air inlet into which air flows when the vehicle travels, an air outlet that discharges the air that flows in from the air inlet, and an internal flow path that connects the air inlet and the air outlet.
- Components An ozone purifier that is supported on the wall surface of the internal flow path and contains activated carbon, The amount of the ozone purifier carried is smaller on the air inlet side than on the air outlet side.
- the second invention is the first invention, wherein
- the vehicle component is a heat exchanger that exchanges heat between the incoming air and the wall surface,
- the amount of the ozone purifier carried in a predetermined region on the air inlet side of the wall surface is zero.
- the third invention is the first or second invention, wherein
- the vehicle component is a radiator or an intercooler.
- the ozone purifier further includes at least one of manganese, iron, cobalt, nickel, copper, ruthenium and rhodium.
- the amount of the ozone purifier carried in the predetermined area is zero, inflow air can be brought into direct contact with the wall surface of the internal flow path in the predetermined area. Therefore, heat exchange performance can be improved as compared with the case where the ozone purifier is also carried in the predetermined region. Therefore, according to the present invention, when the vehicle component is a heat exchanger, it is possible to provide a DOR system that can improve the durability of the ozone purifier while ensuring the cooling performance.
- the ozone purifier is provided in the radiator or intercooler in which the engine cooling water or the like flows, so that the ozone purifying reaction using the heat of the engine cooling water or the like is efficiently performed in the ozone purifying body. It is possible to proceed to.
- At least one of manganese, iron, cobalt, nickel, copper, ruthenium and rhodium can be carried on the wall surface of the internal flow path as the ozone purifier in combination with activated carbon.
- FIG. 2 is a cross-sectional view of a radiator 14. It is the elements on larger scale of the fin 20 of FIG. It is the figure which showed the result of the ozone purification test in the case of changing the passage speed of ozone containing gas. It is the figure which showed the relationship between the speed of the gas which passes a radiator, and the probability that the gas contacts a radiator. It is the figure which showed the relationship between the distance from the front surface of the radiator 14, and a gas contact probability. It is the figure which showed the result of the durability test. It is the figure which showed the specific example of the coating amount of the activated carbon coated on the fin.
- FIG. 1 is a schematic diagram showing the configuration of a vehicle equipped with the air purification device of the present embodiment.
- the vehicle 10 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 including the internal combustion engine 12 and purifying ozone in the air while the vehicle 10 is traveling, the influence of the vehicle 10 on the environment can be reduced.
- 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.
- a condenser 16 for an air conditioner is attached in front of the radiator 14. As indicated by arrows in FIG. 1, when the vehicle 10 travels, air is taken in from the bumper grille 18 on the front surface of the vehicle 10, and the taken-in air passes through the condenser 16 and the radiator 14 in this order and is discharged backward. Is done.
- FIG. 2 is a cross-sectional view of the radiator 14.
- a plurality of louvers 22 are formed on the fin 20 of the radiator 14.
- the louver 22 is composed of inclined pieces 22a and 22b inclined obliquely with respect to the flat portions 20a and 20b of the fins, and a bent piece 22c formed by bending. According to such a configuration of the louver 22, pressure loss can be caused when the atmosphere flows through the louver 22, so that the flow velocity can be reduced. In addition, a secondary air flow can be generated. Therefore, the heat dissipation performance by the radiator 14 can be improved.
- the air purification apparatus of this embodiment is formed by coating the fin 20 of FIG. 2 with activated carbon as an ozone purifier.
- FIG. 3 is a partially enlarged view of the fin 20 of FIG. 2A is a partially enlarged view of the fin 20 on the front side
- FIG. 2B is a partially enlarged view of the fin 20 on the rear side.
- the louver 22 is adjusted so that the coat amount of the activated carbon gradually increases from the front side to the rear side. The reason why the coating amount is adjusted in this way will be described with reference to FIGS. 4 to 6 relating to the knowledge already obtained by the present inventors and FIG. 7 relating to the newly obtained knowledge.
- FIG. 4 is a diagram showing the results of the ozone purification test when the passage speed of the ozone-containing gas is changed.
- the horizontal axis in FIG. 4 represents the endurance distance (kilomile), and the vertical axis represents the relative value based on the ozone purification rate in the initial state (when the endurance distance is 0 kilomile).
- Each data shown in FIG. 4 is prepared by preparing two activated carbons having the same size and specific surface area, and moving ozone-containing gas at a constant concentration from the front to the rear of the two activated carbons at different speeds (wind speed 1 m / s and wind speed). 10 m / s), and obtained by measuring the ozone concentration behind the activated carbon, respectively.
- the ozone purification rate of the activated carbon decreases as the endurance distance increases. Further, as shown in FIG. 4, the degree of decrease in the ozone purification rate of the activated carbon varies depending on the speed of the ozone-containing gas to be passed. Specifically, when the ozone-containing gas is passed at a wind speed of 1 m / s, the ozone purification rate is reduced to half of the initial state at about 30 kilomiles, but when the ozone-containing gas is passed at a wind speed of 10 m / s. Even about 30 km, it shows about 70% or more of the initial state, and finally decreases to about half of the initial state around 60 km. That is, when passing at a low speed (wind speed of 1 m / s), the degree of decrease in the ozone purification rate becomes larger than when passing at a high speed (wind speed of 10 m / s).
- FIG. 5 is a graph showing the relationship between the speed of the gas passing through the radiator and the probability that the gas contacts the radiator (hereinafter referred to as “gas contact probability”). This graph was calculated by applying the Gormley-Kennedy diffusion theory formula to the aluminum honeycomb radiator model. As shown in FIG. 5, the gas contact probability is about 100% when the wind speed is around 1 m / s, and the gas contact probability is about 10% when the wind speed is around 10 m / s. That is, the gas contact probability is high when the passing gas velocity is low, and gradually decreases as the passing gas velocity increases.
- FIG. 6 is a diagram showing the relationship between the distance from the front surface of the radiator 14 and the gas contact probability.
- the gas contact probability increases as the distance from the front surface of the radiator 14 increases. The reason for this is that, as described in the description of FIG. 2, the atmospheric flow can be decelerated or the secondary flow can be generated by forming the louver 22 in the radiator 14. Therefore, it can be seen from FIGS. 4 to 6 that the gas contact probability increases as the distance from the front surface of the radiator 14 increases, and the degree of decrease in the ozone purification rate increases.
- the present inventors have already made development focusing on the fact that the decrease in the ozone purification rate of the activated carbon is mainly due to the oxidizing action by the active oxygen generated during the ozonolysis of the activated carbon. That is, if active oxygen is generated while the vehicle is running, this active oxygen flows from the front side to the rear side.
- the present inventors presume that the probability that the active oxygen contacts the radiator becomes higher on the rear side, and therefore, the disappearance of the activated carbon becomes more remarkable on the rear side, and a radiator with a reduced amount of activated carbon coating from the front side to the rear side is considered. We are developing.
- FIG. 7 is data showing the results of this durability test.
- Each of the three types of data shown in FIG. 7 shows an Rr high carrying product (solid line), an Fr high carrying product (dashed line), and a uniform carrying product (dashed line).
- the Rr high carrying product is obtained by adjusting the activated carbon coat amount on the rear side more than the front side.
- the Fr high-supported product is a product in which the amount of activated carbon coating on the front side is adjusted more than that on the rear side.
- the uniform carrier product is one that does not make a difference in the amount of activated carbon coating from the front side to the rear side.
- the horizontal axis represents the durable distance (kilomile), and the vertical axis represents the relative value based on the ozone purification rate in the initial state of the high Fr loaded product (when the durable distance is 0 kilomile).
- the ozone purification rate of the activated carbon decreases according to the endurance distance, but the degree of decrease varies depending on the activated carbon coating amount. That is, the degree of decrease in the high Rr carrying product and the high Fr carrying product is smaller than that in the uniform carrying product. In addition, the degree of decrease in the high Rr supported product is smaller than that of the high Fr supported product.
- FIG. 8 is a diagram showing a specific example of the amount of activated carbon coated on the fin 20.
- the gas contact probability increases in a quadratic function as the distance from the front surface of the radiator 14 increases. Therefore, the activated carbon coating amount is increased logarithmically or proportionally according to the distance from the front surface of the radiator 14 as shown in FIG. That is, the activated carbon coating amount is adjusted so as to be opposite to the radiator previously developed by the inventors. In addition, you may adjust with the coating thickness of activated carbon instead of the coating amount of activated carbon.
- the flat portion 20a is not coated with activated carbon at all.
- activated carbon non-coating portion it is possible to secure a certain amount of surface area where the atmosphere directly contacts the fins 20 on the front surface side of the radiator 14. Therefore, the original cooling function of the radiator 14 can be secured.
- the activated carbon coating amount is adjusted to increase from the front surface side to the rear surface side of the radiator 14, the radiator is allowed to have some degree of oxidative deterioration due to active oxygen.
- the durability as 14 can be improved.
- the activated carbon non-coating portion is provided in the flat portion 20a, it is possible to ensure the original cooling function of the radiator 14.
- the radiator 14 is exemplified as the vehicle component, but the present invention can also be applied to an intercooler. Since the intercooler is provided at a location where an air flow path is formed while the vehicle is running, when the activated carbon whose coat amount is adjusted is provided on the fin of the intercooler as in the present embodiment. It is possible to obtain the same effect as in the present embodiment.
- the radiator 14 including the fins 20 is used, but the fins 20 are not necessarily required. That is, instead of the radiator 14, a so-called honeycomb radiator in which cooling cores having narrow flow paths are densely packed may be used.
- a honeycomb radiator is used, activated carbon is coated on the flow path wall surface. Therefore, the pressure loss of the atmosphere flowing in the flow path increases toward the downstream side, and the flow velocity decreases. Therefore, since the gas contact probability increases toward the downstream side, the effects described above can be obtained by adjusting the coating amount of the activated carbon as in the present embodiment.
- the fin 20 is coated with activated carbon, but a single metal such as manganese, iron, cobalt, nickel, copper, ruthenium or rhodium may be coated simultaneously with the activated carbon. Note that two or more of these single metals may be coated at the same time.
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Abstract
Description
車両走行時に大気が流入する大気流入口と、前記大気流入口から流入した大気を外部に排出する大気排出口と、前記大気流入口と前記大気排出口とを接続する内部流路とを備える車両構成部品と、
前記内部流路の壁面に担持され、活性炭を含むオゾン浄化体と、を備え、
前記オゾン浄化体の担持量が、前記大気排出口側よりも前記大気流入口側の方が少ないことを特徴とする。
前記車両構成部品は、流入大気と前記壁面との間で熱交換を行う熱交換器であり、
前記壁面の大気流入口側の所定領域に担持する前記オゾン浄化体の担持量がゼロであることを特徴とする。
前記車両構成部品がラジエータまたはインタークーラであることを特徴とする。
前記オゾン浄化体が、マンガン、鉄、コバルト、ニッケル、銅、ルテニウムおよびロジウムのうちの少なくとも1つを更に含むことを特徴とする。
12 内燃機関
14 ラジエータ
16 コンデンサ
18 バンパーグリル
20 フィン
20a,b 平坦部
22 ルーバ
22a,b 傾斜片
22c 折曲片
Claims (4)
- 車両走行時に大気が流入する大気流入口と、前記大気流入口から流入した大気を外部に排出する大気排出口と、前記大気流入口と前記大気排出口とを接続する内部流路とを備える車両構成部品と、
前記内部流路の壁面に担持され、活性炭を含むオゾン浄化体と、を備え、
前記オゾン浄化体の担持量が、前記大気排出口側よりも前記大気流入口側の方が少ないことを特徴とする車両用大気浄化装置。 - 前記車両構成部品は、流入大気と前記壁面との間で熱交換を行う熱交換器であり、
前記壁面の大気流入口側の所定領域に担持する前記オゾン浄化体の担持量がゼロであることを特徴とする請求項1に記載の車両用大気浄化装置。 - 前記車両構成部品がラジエータまたはインタークーラであることを特徴とする請求項1または2に記載の車両用大気浄化装置。
- 前記オゾン浄化体が、マンガン、鉄、コバルト、ニッケル、銅、ルテニウムおよびロジウムのうちの少なくとも1つを更に含むことを特徴とする請求項1乃至3何れか1項に記載の車両用大気浄化装置。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP12875224.3A EP2843349B1 (en) | 2012-04-25 | 2012-04-25 | Air purification device for vehicle |
PCT/JP2012/061021 WO2013161012A1 (ja) | 2012-04-25 | 2012-04-25 | 車両用大気浄化装置 |
CN201280072429.0A CN104246416B (zh) | 2012-04-25 | 2012-04-25 | 车辆用大气净化装置 |
JP2014512067A JP5812192B2 (ja) | 2012-04-25 | 2012-04-25 | 車両用大気浄化装置 |
US14/394,554 US9162003B2 (en) | 2012-04-25 | 2012-04-25 | Air purification device for vehicle |
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PCT/JP2012/061021 WO2013161012A1 (ja) | 2012-04-25 | 2012-04-25 | 車両用大気浄化装置 |
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EP (1) | EP2843349B1 (ja) |
JP (1) | JP5812192B2 (ja) |
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- 2012-04-25 JP JP2014512067A patent/JP5812192B2/ja not_active Expired - Fee Related
- 2012-04-25 CN CN201280072429.0A patent/CN104246416B/zh not_active Expired - Fee Related
- 2012-04-25 US US14/394,554 patent/US9162003B2/en not_active Expired - Fee Related
- 2012-04-25 WO PCT/JP2012/061021 patent/WO2013161012A1/ja active Application Filing
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Also Published As
Publication number | Publication date |
---|---|
JPWO2013161012A1 (ja) | 2015-12-21 |
CN104246416A (zh) | 2014-12-24 |
US9162003B2 (en) | 2015-10-20 |
JP5812192B2 (ja) | 2015-11-11 |
CN104246416B (zh) | 2016-08-24 |
EP2843349B1 (en) | 2019-03-27 |
EP2843349A4 (en) | 2015-04-01 |
US20150050189A1 (en) | 2015-02-19 |
EP2843349A1 (en) | 2015-03-04 |
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