JP2001347829A - Ozone purifying device for vehicle - Google Patents
Ozone purifying device for vehicleInfo
- Publication number
- JP2001347829A JP2001347829A JP2000170248A JP2000170248A JP2001347829A JP 2001347829 A JP2001347829 A JP 2001347829A JP 2000170248 A JP2000170248 A JP 2000170248A JP 2000170248 A JP2000170248 A JP 2000170248A JP 2001347829 A JP2001347829 A JP 2001347829A
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- JP
- Japan
- Prior art keywords
- ozone
- deterioration
- concentration
- catalyst
- ozone concentration
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、大気中のオゾン
（Ｏ3）を浄化するオゾン浄化装置に関し、特に車両の
装着して用いるものに関する。The present invention relates to relates to an ozone purifier for purifying the atmospheric ozone (O 3), it relates to those used in particular mounting of the vehicle.
【０００２】[0002]
【従来の技術】車両が走行することにより、その車体表
面やラジエータ表面などに空気が接触して流れることに
着目し、そのような部分にオゾン浄化触媒を配置して、
大気中のオゾンを浄化する装置が従来より提案されてい
る（特表平１１−５０７２８９号公報）。この装置は、
大気中のオゾンを浄化することにより、光化学スモッグ
の発生を抑制しようとするものである。2. Description of the Related Art When a vehicle travels, attention is paid to the fact that air flows in contact with the surface of a vehicle body or a surface of a radiator, and an ozone purification catalyst is disposed in such a portion.
A device for purifying ozone in the atmosphere has been conventionally proposed (Japanese Unexamined Patent Publication No. 11-507289). This device is
It is intended to suppress the generation of photochemical smog by purifying ozone in the atmosphere.
【０００３】[0003]
【発明が解決しようとする課題】このようなオゾン浄化
装置においては、その表面に例えば埃等の異物が付着し
た場合、特に粒径が数ミクロンの埃は触媒層に侵入し、
触媒層でのオゾンの拡散を阻害し、あるいは目詰まり等
により触媒に接触するオゾン量を減少させる。そのた
め、触媒により浄化されるオゾン量が減少し、オゾン浄
化装置の浄化能力が低下してしまう。あるいは、大気中
の硫黄酸化物（ＳＯｘ）等により、オゾン浄化装置の浄
化能力そのものが低下する場合があるという問題点があ
った。In such an ozone purifying apparatus, when foreign matter such as dust adheres to the surface of the ozone purifying apparatus, dust having a particle diameter of several microns in particular enters the catalyst layer,
It inhibits the diffusion of ozone in the catalyst layer or reduces the amount of ozone coming into contact with the catalyst due to clogging or the like. Therefore, the amount of ozone purified by the catalyst decreases, and the purifying ability of the ozone purifying device decreases. Alternatively, there has been a problem that the purification capability itself of the ozone purification device may be reduced due to sulfur oxides (SOx) in the air and the like.
【０００４】本発明はこの点に着目してなされたもので
あり、埃等の異物の付着することによる劣化やＳＯｘに
起因する劣化など、様々な原因により引き起こされるオ
ゾン浄化触媒の劣化を確実に検出することできる機能を
備えた車両用オゾン浄化装置を提供することを目的とす
る。The present invention has been made in view of this point, and it is possible to reliably prevent the deterioration of the ozone purification catalyst caused by various causes such as deterioration caused by the attachment of foreign matter such as dust and deterioration caused by SOx. It is an object of the present invention to provide a vehicle ozone purification device having a function of detecting the ozone.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するため
請求項１に記載の発明は、車両に搭載されたオゾン浄化
触媒と、前記オゾン浄化触媒を通過する前の空気中のオ
ゾン濃度を検出する第１のオゾン濃度検出手段と、前記
オゾン浄化触媒を通過した後の空気中のオゾン濃度を検
出する第２のオゾン濃度検出手段と、前記第１及び第２
のオゾン濃度検出手段の出力を用いて、前記オゾン浄化
触媒の劣化を検出する劣化検出手段とを有することを特
徴とする車両用オゾン浄化装置を提供する。According to a first aspect of the present invention, an ozone purifying catalyst mounted on a vehicle and an ozone concentration in air before passing through the ozone purifying catalyst are detected. First ozone concentration detecting means for detecting the ozone concentration in the air after passing through the ozone purifying catalyst, and first and second ozone concentration detecting means for detecting the ozone concentration in the air after passing through the ozone purifying catalyst.
A deterioration detecting means for detecting deterioration of the ozone purifying catalyst by using an output of the ozone concentration detecting means.
【０００６】この構成によれば、オゾン浄化触媒を通過
する前の空気中のオゾン濃度、及びオゾン浄化触媒を通
過した後の空気中のオゾン濃度が検出され、該検出され
たオゾン濃度を用いて、オゾン浄化触媒の劣化が検出さ
れるので、オゾン浄化触媒の浄化能力を直接的に把握す
ることができ、埃等の異物が付着することによる劣化や
ＳＯｘに起因する劣化など、様々な原因により引き起こ
されるオゾン浄化装置の劣化を確実に検出することでき
る。[0006] According to this configuration, the ozone concentration in the air before passing through the ozone purification catalyst and the ozone concentration in the air after passing through the ozone purification catalyst are detected, and the detected ozone concentration is used. Since the deterioration of the ozone purifying catalyst is detected, the purifying ability of the ozone purifying catalyst can be directly grasped, and various causes such as deterioration due to the attachment of foreign matter such as dust and deterioration due to SOx can be obtained. It is possible to reliably detect the deterioration of the ozone purifier caused.
【０００７】請求項２に記載の発明は、請求項１に記載
の車両用オゾン浄化装置において、前記オゾン浄化触媒
を通過する風量を検出する風量検出手段をさらに備え、
前記劣化検出手段は、前記第１及び第２のオゾン濃度検
出手段の出力及び前記風量検出手段の出力に基づいて前
記オゾン浄化触媒の劣化を検出することを特徴とする。According to a second aspect of the present invention, there is provided the vehicle ozone purification apparatus according to the first aspect, further comprising an air volume detecting means for detecting an air volume passing through the ozone purification catalyst.
The deterioration detecting means detects deterioration of the ozone purifying catalyst based on an output of the first and second ozone concentration detecting means and an output of the air flow detecting means.
【０００８】この構成によれば、オゾン浄化触媒を通過
する風量が検出され、第１及び第２のオゾン濃度検出手
段の出力とともに、検出風量に基づいてオゾン浄化触媒
の劣化が検出される。オゾン浄化装置の性能は、オゾン
浄化触媒の浄化能力と、オゾン浄化触媒を通過する風量
との積に比例するので、風量を検出することにより、埃
の付着などに起因する目詰まりの影響をも加味して、当
該オゾン浄化装置の性能を総合的に評価して劣化を検出
することができ、より精度の高い劣化検出が可能とな
る。According to this configuration, the amount of air passing through the ozone purifying catalyst is detected, and the deterioration of the ozone purifying catalyst is detected based on the detected air amount together with the outputs of the first and second ozone concentration detecting means. The performance of the ozone purification device is proportional to the product of the purification capacity of the ozone purification catalyst and the air volume passing through the ozone purification catalyst. In addition, deterioration can be detected by comprehensively evaluating the performance of the ozone purifying device, and more accurate deterioration detection can be performed.
【０００９】請求項３に記載の発明は、請求項１または
２に記載の車両用オゾン浄化装置において、前記オゾン
浄化触媒を通過する空気流の、前記第１のオゾン濃度検
出手段の上流側にオゾンを供給するオゾン供給手段を有
することを特徴とする。この構成によれば、オゾン浄化
触媒を通過する空気流の、第１のオゾン濃度検出手段の
上流側に、オゾンが供給されるので、オゾン濃度検出手
段の検出可能範囲が狭い場合でも、オゾン浄化触媒の浄
化能力を正確に検出することが可能となる。According to a third aspect of the present invention, in the vehicle ozone purifying apparatus according to the first or second aspect, an airflow passing through the ozone purifying catalyst is provided upstream of the first ozone concentration detecting means. It has ozone supply means for supplying ozone. According to this configuration, ozone is supplied to the air flow passing through the ozone purification catalyst on the upstream side of the first ozone concentration detection means. Therefore, even when the detectable range of the ozone concentration detection means is narrow, the ozone purification is performed. It is possible to accurately detect the purifying ability of the catalyst.
【００１０】オゾン供給手段から供給されるオゾンの拡
散を防止する拡散防止管を設けることが望ましく、さら
に第２のオゾン濃度検出手段の下流側に、オゾンを分解
するオゾン分解手段を設けるとよい。また、オゾン浄化
触媒の上流側の拡散防止管と下流側の拡散防止管とを連
結し、循環型拡散防止管としてもよい。循環型拡散防止
管には、空気流を生成する送風手段を設け、オゾン濃度
検出手段による濃度検出に適した空気流速となるように
送風手段を作動させるとよい。It is desirable to provide a diffusion prevention pipe for preventing the diffusion of ozone supplied from the ozone supply means, and it is preferable to provide an ozone decomposing means for decomposing ozone downstream of the second ozone concentration detecting means. Further, the diffusion prevention pipe on the upstream side of the ozone purification catalyst and the diffusion prevention pipe on the downstream side may be connected to form a circulation type diffusion prevention pipe. The circulation type diffusion prevention pipe may be provided with a blowing means for generating an air flow, and the blowing means may be operated so as to have an air flow rate suitable for concentration detection by the ozone concentration detecting means.
【００１１】さらにオゾン濃度検出手段、オゾン供給手
段、拡散防止管などの劣化検出のための構成要素は、劣
化検出実行時以外は、オゾン浄化触媒へ流入し、流出す
る空気流を妨げない位置に移動させる移動手段を備える
ことが望ましい。Further, components for detecting deterioration, such as the ozone concentration detecting means, the ozone supplying means, and the diffusion prevention pipe, are located at a position which does not hinder the flow of air flowing into and out of the ozone purifying catalyst except when the deterioration detection is performed. It is desirable to have moving means for moving.
【００１２】[0012]
【発明の実施の形態】以下本発明の実施の形態を図面を
参照して説明する。図１は本発明の一実施形態にかかる
車両用オゾン浄化装置の構成を示す図である。この装置
は、オゾン浄化触媒を車両のラジエータ１の表面に担持
させるとともに、空気中のオゾン濃度を検出するオゾン
濃度センサ２，３と、当該車両の走行速度（車速）ＶＰ
を検出する車速センサと、これらのセンサの出力に基づ
いてオゾン浄化触媒の劣化を検出する電子制御ユニット
（以下「ＥＣＵ」という）４とを備えて構成されてい
る。オゾン浄化触媒としては、例えば特開平５−３１７
７１７号公報に示されるように、炭酸マンガン（ＭｎＣ
Ｏ3）及び酸化マンガン（ＭｎＯｘ）を主成分とするも
のを用いる。また、オゾン濃度センサ２，３としては、
例えば特開平６−８２４０９号公報に示されるようにマ
グネシウム（Ｍｇ）やカルシウム（Ｃａ）などの２価の
金属と、インジウム（Ｉｎ）及び酸素（Ｏ）との化合物
をガス感応体としたものを用いる。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a configuration of a vehicle ozone purifying apparatus according to one embodiment of the present invention. This device has an ozone purifying catalyst carried on the surface of a radiator 1 of a vehicle, ozone concentration sensors 2 and 3 for detecting an ozone concentration in the air, and a traveling speed (vehicle speed) VP of the vehicle.
And an electronic control unit (hereinafter referred to as “ECU”) 4 for detecting deterioration of the ozone purifying catalyst based on the outputs of these sensors. Examples of the ozone purification catalyst include, for example, Japanese Patent Application Laid-Open No. 5-317.
No. 717, manganese carbonate (MnC
O 3 ) and manganese oxide (MnOx) are used as main components. Also, as the ozone concentration sensors 2 and 3,
For example, as disclosed in Japanese Patent Application Laid-Open No. 6-82409, a gas-sensitive material obtained by using a compound of a divalent metal such as magnesium (Mg) or calcium (Ca), indium (In) and oxygen (O). Used.
【００１３】ラジエータ１は、当該車両のエンジン（図
示せず）を冷却するエンジン冷却水の温度を低下させる
ために設けられた放熱手段である。車両の走行により発
生する空気流は、図に矢印Ａで示すように流れる。この
空気流の、ラジエータ１の上流側にオゾン濃度センサ２
が配置され、下流側にオゾン濃度センサ３が配置されて
いる。上流側オゾン濃度センサ２により、オゾン浄化触
媒を通過する前の空気中のオゾン濃度が検出され、下流
側オゾン濃度センサにより、オゾン浄化触媒を通過した
後の空気中のオゾン濃度が検出される。The radiator 1 is a radiator provided to lower the temperature of engine cooling water for cooling an engine (not shown) of the vehicle. The air flow generated by the running of the vehicle flows as shown by the arrow A in the figure. An ozone concentration sensor 2 is provided upstream of the radiator 1 in the air flow.
Is arranged, and the ozone concentration sensor 3 is arranged on the downstream side. The upstream ozone concentration sensor 2 detects the ozone concentration in the air before passing through the ozone purification catalyst, and the downstream ozone concentration sensor detects the ozone concentration in the air after passing through the ozone purification catalyst.
【００１４】上流側オゾン濃度センサ２により検出され
る上流側オゾン濃度ＣＴＯ３Ｕ、下流側オゾン濃度セン
サ３により検出される下流側オゾン濃度ＣＴＯ３Ｌとを
比較することにより、オゾン浄化触媒の劣化を検出す
る。より具体的には、例えば浄化率ＲＰ＝１−ＣＴＯ３
Ｌ／ＣＴＯ３Ｕと定義し、初期状態（新品の状態）にお
ける浄化率ＲＰ０対して例えば５０％以下となったとき
（ＲＰ≦ＲＰ０×０．５となったとき）、オゾン浄化触
媒が劣化したと判定する。そしてその結果をランプを点
灯させることなどにより運転者に知らせる。あるいは、
劣化度合ＲＤ＝ＲＰ／ＲＰ０と定義し、この劣化度合そ
のものを表示するようにしてもよい。The deterioration of the ozone purification catalyst is detected by comparing the upstream ozone concentration CTO3U detected by the upstream ozone concentration sensor 2 with the downstream ozone concentration CTO3L detected by the downstream ozone concentration sensor 3. More specifically, for example, the purification rate RP = 1−CTO3
Defined as L / CTO3U, when the purification rate RP0 in the initial state (new state) is, for example, 50% or less (when RP ≦ RP0 × 0.5), it is determined that the ozone purification catalyst has deteriorated. I do. The result is notified to the driver by lighting a lamp or the like. Or,
The degree of deterioration RD may be defined as RD = RP / RP0, and the degree of deterioration itself may be displayed.
【００１５】本実施形態によれば、オゾン浄化触媒を担
持するラジエータ１を通過する前の空気中のオゾン濃度
と、ラジエータ１を通過した後の空気中のオゾン濃度と
が検出され、該検出されたオゾン濃度を用いて、オゾン
浄化触媒の劣化が検出されるので、オゾン浄化触媒の浄
化能力を直接的に把握することができ、埃等の異物が付
着することによる劣化やＳＯｘに起因する劣化など、様
々な原因により引き起こされるオゾン浄化装置の劣化を
確実に検出することできる。According to this embodiment, the ozone concentration in the air before passing through the radiator 1 carrying the ozone purifying catalyst and the ozone concentration in the air after passing through the radiator 1 are detected. Since the deterioration of the ozone purifying catalyst is detected using the ozone concentration, the purifying ability of the ozone purifying catalyst can be directly grasped, and the deterioration due to the attachment of foreign matter such as dust and the deterioration due to SOx can be obtained. For example, it is possible to reliably detect deterioration of the ozone purifier caused by various causes.
【００１６】なお、オゾン浄化率ＲＰは、図３に実線で
示すように風速、すなわち空気流速により変化する。具
体的には、風速が高くなるほど浄化率ＲＰは低下するの
で、劣化判定用閾値を、図３に破線で示すように風速が
高くなるほど小さくなるように設定するようにしてもよ
い。その場合、検出した車速ＶＰに応じて風速を推定
し、該推定した風速に応じて劣化判定用閾値を設定する
ことが望ましい。図１に示す例では、ＥＣＵ４が劣化検
出手段を構成し、車速センサ５が風量検出手段を構成す
る。The ozone purification rate RP changes depending on the wind speed, that is, the air flow velocity as shown by the solid line in FIG. Specifically, since the purification rate RP decreases as the wind speed increases, the deterioration determination threshold value may be set to decrease as the wind speed increases, as indicated by the broken line in FIG. In that case, it is desirable to estimate the wind speed in accordance with the detected vehicle speed VP and to set a deterioration determination threshold value in accordance with the estimated wind speed. In the example shown in FIG. 1, the ECU 4 constitutes the deterioration detecting means, and the vehicle speed sensor 5 constitutes the air flow detecting means.
【００１７】（変形例１）さらに、図２に示すように、
風速センサ６をラジエータ１の直ぐ下流側に設け、風速
センサ６により風速を検出するようにしてもよい。これ
により、オゾン浄化触媒の目詰まりなどに起因する風速
の低下の影響を反映させることができるため、より正確
な劣化度合の検出を行うことが可能となる。(Modification 1) Further, as shown in FIG.
The wind speed sensor 6 may be provided immediately downstream of the radiator 1 so that the wind speed sensor 6 detects the wind speed. Accordingly, the influence of the decrease in the wind speed caused by clogging of the ozone purification catalyst can be reflected, so that it is possible to detect the degree of deterioration more accurately.
【００１８】なお、風速センサに代えて、ラジエータ１
の上流側と下流側に圧力センサを設け、２つの圧力セン
サの検出圧力の差から、通過風量を検出し、検出風量か
ら風速を推定するようにしてもよい。すなわち風速セン
サ６あるいはラジエータ１の上流側及び下流側に設けた
２つの圧力センサによって、風量検出手段を構成しても
よい。Note that a radiator 1 is used instead of the wind speed sensor.
Pressure sensors may be provided on the upstream side and the downstream side, and the amount of passing air may be detected from the difference between the detected pressures of the two pressure sensors, and the wind speed may be estimated from the detected amount of air. That is, the air flow rate detecting means may be constituted by the wind speed sensor 6 or two pressure sensors provided on the upstream and downstream sides of the radiator 1.
【００１９】（変形例２）現実の路上のオゾン濃度は、
車両から排出されるＮＯとの反応により、大きく濃度が
変化している。また、気温と日射量が低下する冬季で
は、大気中のオゾン濃度が低下する。このような場合に
は、使用するオゾン濃度センサによっては、応答速度が
遅すぎたり、検出可能な濃度範囲を外れたりすることが
あり、オゾン浄化触媒の劣化度合の検出を正確に行えな
い可能性がある。(Modification 2) The actual ozone concentration on the road is
The concentration changes greatly due to the reaction with NO emitted from the vehicle. In winter, when temperature and solar radiation decrease, the ozone concentration in the atmosphere decreases. In such a case, depending on the ozone concentration sensor used, the response speed may be too slow or may fall outside the detectable concentration range, and the degree of deterioration of the ozone purification catalyst may not be accurately detected. There is.
【００２０】そこで、そのような場合に対処するために
図４に示すように、上流側オゾン濃度センサ２の上流側
にオゾンを供給するオゾン供給手段としてのオゾン発生
器７を設けるとよい。Therefore, in order to cope with such a case, as shown in FIG. 4, an ozone generator 7 as an ozone supply means for supplying ozone to the upstream side of the upstream ozone concentration sensor 2 may be provided.
【００２１】図６は、オゾン発生器７の構成例を示す回
路図であり、オゾン発生器７は、直流電源電圧ＶＤが供
給されるスイッチ２１と、昇圧コイル２２と、ダイオー
ド２３と、コロナ電極２４とによって構成される。スイ
ッチ２１には、ＥＣＵ４から制御信号ＳＣＴＬが供給さ
れ、スイッチ２１のオンオフがＥＣＵ４により制御され
る。オゾンを発生させるときは、スイッチ２１をオフか
らオンに変化させる。これにより、昇圧コイル２２の２
次側に高電圧が発生し、コロナ電極２２に放電が発生
し、オゾンが生成される。FIG. 6 is a circuit diagram showing an example of the configuration of the ozone generator 7. The ozone generator 7 includes a switch 21 to which a DC power supply voltage VD is supplied, a booster coil 22, a diode 23, and a corona electrode. 24. The control signal SCTL is supplied from the ECU 4 to the switch 21, and the on / off of the switch 21 is controlled by the ECU 4. To generate ozone, the switch 21 is changed from off to on. As a result, the booster coil 22
A high voltage is generated on the next side, a discharge is generated on the corona electrode 22, and ozone is generated.
【００２２】オゾン発生器７を用いて、使用するオゾン
濃度センサの精度が十分確保される濃度となるように、
オゾンを発生させることにより、高精度のオゾン濃度検
出を行い、劣化度合を正確に検出することが可能とな
る。Using the ozone generator 7, the concentration of the ozone concentration sensor to be used is adjusted so that the accuracy is sufficiently secured.
By generating ozone, the ozone concentration can be detected with high accuracy, and the degree of deterioration can be accurately detected.
【００２３】（変形例３）図５は、図４の構成の変形例
を示す。この例は、ラジエータの上流側及び下流側に、
拡散防止管１０及び１１を設け、発生したオゾンを拡散
防止管１０及び１１内を通過させるとともに、拡散防止
管１１の出口付近にオゾン分解装置８を設けたものであ
る。このように構成することにより、発生させたオゾン
を車外に放出することを防止することができる。なお、
オゾン分解装置８に代えて、オゾン回収装置を設けるよ
うにしてもよい。(Modification 3) FIG. 5 shows a modification of the configuration of FIG. In this example, upstream and downstream of the radiator,
Diffusion prevention tubes 10 and 11 are provided, and the generated ozone passes through the diffusion prevention tubes 10 and 11, and an ozone decomposing device 8 is provided near the outlet of the diffusion prevention tube 11. With this configuration, it is possible to prevent the generated ozone from being released outside the vehicle. In addition,
Instead of the ozone decomposing device 8, an ozone recovery device may be provided.
【００２４】また、拡散防止管１０，１１やオゾン発生
器７及びオゾン分解装置８を、ラジエータ１の前側近傍
及び後側近傍に常に設置しておくと、他の場所と比較し
て各種劣化因子の影響が少なくなり、オゾン浄化触媒の
全体としての浄化能力判定の精度が低下する可能性があ
る。そこで、オゾン発生器７、オゾン分解装置８及びオ
ゾン濃度センサ２，３が固定された拡散防止管１０，１
１を、図７に示すように軸１３を中心として回動可能な
アーム１２に固定し、オゾン浄化触媒の劣化判定を行わ
ないときは、収納箱１４に収納するようにすることが望
ましい。If the diffusion preventing tubes 10, 11 and the ozone generator 7 and the ozone decomposing device 8 are always installed near the front side and the rear side of the radiator 1, various deterioration factors are compared with other places. And the accuracy of the purification capability determination of the ozone purification catalyst as a whole may be reduced. Therefore, the diffusion prevention tubes 10, 1 to which the ozone generator 7, the ozone decomposing device 8, and the ozone concentration sensors 2, 3 are fixed.
As shown in FIG. 7, it is desirable to fix 1 to an arm 12 that is rotatable about a shaft 13 and store it in a storage box 14 when the deterioration determination of the ozone purification catalyst is not performed.
【００２５】（変形例４）図８は、オゾン発生器７，オ
ゾン濃度センサ２，３とともに、送風機１６を配置した
循環型拡散防止管１５を設け、空気を図に矢印で示すよ
うに循環させるようにしたオゾン浄化装置を示す。(Modification 4) FIG. 8 shows an ozone generator 7, ozone concentration sensors 2 and 3, together with a circulation type diffusion prevention pipe 15 in which a blower 16 is arranged, and circulates air as shown by arrows in the figure. 1 shows an ozone purifier configured as described above.
【００２６】この装置では、オゾン発生器７により発生
させたオゾンを含む空気が、循環されるので、最初にオ
ゾンを発生させて濃度を検出した後は、新たにオゾンを
発生させないようにすることにより、発生したオゾンを
ラジエータ１に付着させたオゾン浄化触媒により浄化す
ることができる。In this apparatus, the air containing ozone generated by the ozone generator 7 is circulated. Therefore, after the ozone is first generated and the concentration is detected, no ozone is newly generated. Thus, the generated ozone can be purified by the ozone purification catalyst attached to the radiator 1.
【００２７】また空気流の速度（風速）は、送風機１６
により調整できるので、オゾン濃度の検出に最適な速度
に設定して、劣化度合の検出を行うことができる。な
お、この場合も図９に示すように、拡散防止管１５を回
動させる動力部１７を設け、劣化度合の検出を実行しな
いときは、拡散防止管１５を回動させ、ラジエータ１の
前面及び後面と重ならないようにすることが望ましい。The speed of the air flow (wind speed) is
Therefore, the speed can be set to an optimum speed for detecting the ozone concentration, and the degree of deterioration can be detected. In this case as well, as shown in FIG. 9, a power unit 17 for rotating the diffusion prevention pipe 15 is provided, and when the detection of the degree of deterioration is not performed, the diffusion prevention pipe 15 is rotated and the front of the radiator 1 and It is desirable not to overlap with the rear surface.
【００２８】[0028]
【発明の効果】以上詳述したように請求項１に記載の発
明によれば、オゾン浄化触媒を通過する前の空気中のオ
ゾン濃度、及びオゾン浄化触媒を通過した後の空気中の
オゾン濃度が検出され、該検出されたオゾン濃度を用い
て、オゾン浄化触媒の劣化が検出されるので、オゾン浄
化触媒の浄化能力を直接的に把握することができ、埃等
の異物が付着することによる劣化やＳＯｘに起因する劣
化など、様々な原因により引き起こされるオゾン浄化装
置の劣化を確実に検出することできる。As described in detail above, according to the first aspect of the invention, the ozone concentration in the air before passing through the ozone purification catalyst and the ozone concentration in the air after passing through the ozone purification catalyst. Is detected, and the deterioration of the ozone purification catalyst is detected using the detected ozone concentration. Therefore, the purification capability of the ozone purification catalyst can be directly grasped, and the foreign matter such as dust adheres. It is possible to reliably detect deterioration of the ozone purifier caused by various causes such as deterioration or deterioration caused by SOx.
【００２９】請求項２に記載の発明によれば、オゾン浄
化触媒を通過する風量が検出され、第１及び第２のオゾ
ン濃度検出手段の出力とともに、検出風量に基づいてオ
ゾン浄化触媒の劣化が検出される。オゾン浄化装置の性
能は、オゾン浄化触媒の浄化能力と、オゾン浄化触媒を
通過する風量との積に比例するので、風量を検出するこ
とにより、埃の付着などに起因する目詰まりの影響をも
加味して、当該オゾン浄化装置の性能を総合的に評価し
て劣化を検出することができ、より精度の高い劣化検出
が可能となる。According to the second aspect of the present invention, the amount of air passing through the ozone purifying catalyst is detected, and the deterioration of the ozone purifying catalyst is determined based on the detected air amount together with the outputs of the first and second ozone concentration detecting means. Is detected. Since the performance of the ozone purification device is proportional to the product of the purification capacity of the ozone purification catalyst and the air volume passing through the ozone purification catalyst, detecting the air volume can reduce the effects of clogging due to dust adhesion and the like. In addition, deterioration can be detected by comprehensively evaluating the performance of the ozone purifying device, and more accurate deterioration detection can be performed.
【００３０】請求項３に記載の発明によれば、オゾン浄
化触媒を通過する空気流の、第１のオゾン濃度検出手段
の上流側に、オゾンが供給されるので、オゾン濃度検出
手段の検出可能範囲が狭い場合でも、オゾン浄化触媒の
浄化能力を正確に検出することが可能となる。According to the third aspect of the present invention, ozone is supplied to the air flow passing through the ozone purification catalyst upstream of the first ozone concentration detecting means, so that the ozone concentration detecting means can detect the ozone. Even when the range is narrow, the purification ability of the ozone purification catalyst can be accurately detected.
【図１】本発明の一実施形態にかかるオゾン浄化装置の
構成を示す図である。FIG. 1 is a diagram showing a configuration of an ozone purifying apparatus according to an embodiment of the present invention.
【図２】図１の構成の変形例（変形例１）を示す図であ
る。FIG. 2 is a diagram showing a modification (Modification 1) of the configuration of FIG. 1;
【図３】オゾン浄化触媒を通過する空気流の速度（風
速）と、浄化率との関係を示す図である。FIG. 3 is a diagram showing the relationship between the speed (wind speed) of an air flow passing through an ozone purification catalyst and the purification rate.
【図４】図１の構成の変形例（変形例２）を示す図であ
る。FIG. 4 is a diagram showing a modification (modification 2) of the configuration of FIG. 1;
【図５】図４の構成の変形例（変形例３）を示す図であ
る。FIG. 5 is a diagram showing a modification (modification 3) of the configuration of FIG. 4;
【図６】オゾン発生器の構成例の回路図である。FIG. 6 is a circuit diagram of a configuration example of an ozone generator.
【図７】図５に示す構成の望ましい実施態様を示す図で
ある。FIG. 7 illustrates a preferred embodiment of the configuration shown in FIG. 5;
【図８】図５の構成の変形例（変形例４）を示す図であ
る。FIG. 8 is a diagram showing a modification (modification 4) of the configuration of FIG. 5;
【図９】図８の構成の望ましい実施態様を示す図であ
る。FIG. 9 shows a preferred embodiment of the configuration of FIG. 8;
１ ラジエータ ２ オゾン濃度センサ（第１のオゾン濃度検出手段） ３ オゾン濃度センサ（第２のオゾン濃度検出手段） ４ 電子制御ユニット（劣化検出手段） ５ 車速センサ（風量検出手段） ６ 風速センサ（風量検出手段） ７ オゾン発生器（オゾン供給手段） Reference Signs List 1 radiator 2 ozone concentration sensor (first ozone concentration detection means) 3 ozone concentration sensor (second ozone concentration detection means) 4 electronic control unit (deterioration detection means) 5 vehicle speed sensor (air volume detection means) 6 wind speed sensor (air volume) Detection means) 7 Ozone generator (Ozone supply means)
Claims (3)
を検出する第１のオゾン濃度検出手段と、 前記オゾン浄化触媒を通過した後の空気中のオゾン濃度
を検出する第２のオゾン濃度検出手段と、 前記第１及び第２のオゾン濃度検出手段の出力を用い
て、前記オゾン浄化触媒の劣化を検出する劣化検出手段
とを有することを特徴とする車両用オゾン浄化装置。An ozone purifying catalyst mounted on a vehicle; first ozone concentration detecting means for detecting an ozone concentration in air before passing through the ozone purifying catalyst; and an ozone purifying catalyst after passing through the ozone purifying catalyst. A second ozone concentration detecting means for detecting an ozone concentration in air; and a deterioration detecting means for detecting deterioration of the ozone purification catalyst by using outputs of the first and second ozone concentration detecting means. A vehicle ozone purifying device characterized by the above-mentioned.
出する風量検出手段をさらに備え、前記劣化検出手段
は、前記第１及び第２のオゾン濃度検出手段の出力及び
前記風量検出手段の出力に基づいて前記オゾン浄化触媒
の劣化を検出することを特徴とする請求項１に記載の車
両用オゾン浄化装置。2. The apparatus according to claim 1, further comprising an air flow detecting means for detecting an air flow passing through said ozone purifying catalyst, wherein said deterioration detecting means outputs an output of said first and second ozone concentration detecting means and an output of said air flow detecting means. 2. The vehicle ozone purification apparatus according to claim 1, wherein the deterioration of the ozone purification catalyst is detected based on the ozone purification catalyst.
の、前記第１のオゾン濃度検出手段の上流側にオゾンを
供給するオゾン供給手段を有することを特徴とする請求
項１または２に記載の車両用オゾン浄化装置。3. An ozone supply means for supplying ozone to an upstream side of said first ozone concentration detection means in an air flow passing through said ozone purification catalyst. Ozone purification equipment for vehicles.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000170248A JP2001347829A (en) | 2000-06-07 | 2000-06-07 | Ozone purifying device for vehicle |
| US09/796,551 US6835356B2 (en) | 2000-03-03 | 2001-03-02 | Ozone purifying apparatus for vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000170248A JP2001347829A (en) | 2000-06-07 | 2000-06-07 | Ozone purifying device for vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001347829A true JP2001347829A (en) | 2001-12-18 |
Family
ID=18672995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000170248A Pending JP2001347829A (en) | 2000-03-03 | 2000-06-07 | Ozone purifying device for vehicle |
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| Country | Link |
|---|---|
| JP (1) | JP2001347829A (en) |
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| WO2012131966A1 (en) * | 2011-03-31 | 2012-10-04 | トヨタ自動車株式会社 | Air purification device for vehicles |
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| JP2005345461A (en) * | 2004-06-03 | 2005-12-15 | Hyundai Motor Co Ltd | Air purification system and method for diagnosing malfunction thereof |
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