KR20000056903A - Gas exhaustion apparatus for liquid electrophotographic printer - Google Patents

Gas exhaustion apparatus for liquid electrophotographic printer Download PDF

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Publication number
KR20000056903A
KR20000056903A KR1019990006652A KR19990006652A KR20000056903A KR 20000056903 A KR20000056903 A KR 20000056903A KR 1019990006652 A KR1019990006652 A KR 1019990006652A KR 19990006652 A KR19990006652 A KR 19990006652A KR 20000056903 A KR20000056903 A KR 20000056903A
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KR
South Korea
Prior art keywords
air
exhaust
exhaust line
solvent
combustion unit
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KR1019990006652A
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Korean (ko)
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KR100346693B1 (en
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채성준
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윤종용
삼성전자 주식회사
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Priority to KR1019990006652A priority Critical patent/KR100346693B1/en
Publication of KR20000056903A publication Critical patent/KR20000056903A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
    • B41J29/377—Cooling or ventilating arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/135—Nozzles
    • B41J2/14—Structure thereof only for on-demand ink jet heads
    • B41J2/14016—Structure of bubble jet print heads
    • B41J2/1408—Structure dealing with thermal variations, e.g. cooling device, thermal coefficients of materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/315—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material
    • B41J2/32—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads
    • B41J2/335—Structure of thermal heads
    • B41J2/3358—Cooling arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
    • B41J29/17—Cleaning arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/135—Nozzles
    • B41J2/165—Prevention or detection of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
    • B41J2/16517—Cleaning of print head nozzles
    • B41J2/16552—Cleaning of print head nozzles using cleaning fluids
    • B41J2002/16555—Air or gas for cleaning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2202/00—Embodiments of or processes related to ink-jet or thermal heads
    • B41J2202/01—Embodiments of or processes related to ink-jet heads
    • B41J2202/02—Air-assisted ejection
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2202/00—Embodiments of or processes related to ink-jet or thermal heads
    • B41J2202/01—Embodiments of or processes related to ink-jet heads
    • B41J2202/08—Embodiments of or processes related to ink-jet heads dealing with thermal variations, e.g. cooling

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  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Control Or Security For Electrophotography (AREA)
  • Wet Developing In Electrophotography (AREA)
  • Treating Waste Gases (AREA)

Abstract

PURPOSE: An exhausting device of a wet type electro photographic printer is provided to resolve the complication of substitution of filters by discharging a solvent by thermal dissolving with vapour and dioxide carbon instead of absorption remove by using filters such as activated charcoal. CONSTITUTION: An exhausting device of a wet type electro photographic printer includes an exhausting line(L) forming an air channel from an engine cell(110) in a printer main body(100) outside, an exhausting pump(400) for inhaling air from the engine cell via the exhausting line to discharge outside, and an air cleaning element for removing impurities contained in the air exhausted by the pump, wherein the air cleaning element includes a combustion part(200) for heating the discharged air from to dissolving a solvent in the air by heat, and a heat exchange part(300) mounted at a rear end part of the combustion part for cooling the heated air.

Description

습식 전자사진방식 프린터의 배기장치{Gas exhaustion apparatus for liquid electrophotographic printer}Gas exhaustion apparatus for liquid electrophotographic printer

본 발명은 습식 전자사진방식 프린터의 배기장치에 관한 것으로서, 특히 배기가스를 열분해시켜서 배출할 수 있도록 된 습식 전자사진방식 프린터의 배기장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust device for a wet electrophotographic printer, and more particularly, to an exhaust device for a wet electrophotographic printer that can be discharged by pyrolyzing exhaust gas.

일반적으로 칼라 레이저 프린터와 같은 습식 전자사진방식 프린터(10)에는, 도 1에 도시된 바와 같이 인쇄작업이 이루어지는 엔진셀(11)로부터 고온의 공기를 흡입하여 외부로 배출시키기 위한 배기장치가 마련되어 있다. 상기 배기장치에는, 엔진셀(11)로부터 공기를 흡입하여 외부로 불어내기 위한 배기펌프(13)와, 상기 배기펌프(13)와 엔진셀(11) 사이에 설치되어 배기가스 내의 유해물질을 걸러내기 위한 여과기(12)가 구비된다. 통상 습식 전자사진방식 프린터에서는 인쇄를 위한 토너(toner)용 용제로서 노파(NORPAR; C10H22, C11H24, C12H26, C13H28의 혼합물)라는 용액을 사용하는데, 이 노파는 외부로 유출될 경우 휘발성 유기화합물군(VOC) 물질로 분류되어 주변환경을 오염시킬 수 있다. 따라서, 상기 유해물질은 주로 이 용제가 기화된 것을 나타내며, 상기 여과기(12)도 이 기화된 용제를 제거하는것이 주목적이다. 따라서 이 여과기(12)는 분진을 포집하는 분진필터(12a) 및, 상기 용제를 흡착하여 제거하는 활성탄(12b)으로 구성되어 있다. 따라서 상기 배기펌프(13)에 의해 엔진셀(11)로부터 흡입된 공기는 상기 여과기(12)를 통과하면서 그 안에 함유된 용제가 상기 활성탄(12b)에 흡착되어 걸러진 후 외부로 배출된다.In general, a wet electrophotographic printer 10, such as a color laser printer, is provided with an exhaust device for sucking and discharging high-temperature air to the outside as shown in FIG. . The exhaust device is provided between an exhaust pump 13 for sucking air from the engine cell 11 and blowing it outside, and is disposed between the exhaust pump 13 and the engine cell 11 to filter out harmful substances in the exhaust gas. A filter 12 for dispensing is provided. Conventional wet electrophotographic printers use a solution called NORPAR (a mixture of C 10 H 22 , C 11 H 24 , C 12 H 26 , C 13 H 28 ) as a toner solvent for printing. Old women can be classified as volatile organic compound (VOC) substances if they leak out, which can pollute the surrounding environment. Therefore, the harmful substance mainly indicates that the solvent is vaporized, and the filter 12 also mainly removes the vaporized solvent. Therefore, this filter 12 is comprised from the dust filter 12a which collects dust, and the activated carbon 12b which adsorbs and removes the said solvent. Therefore, the air sucked from the engine cell 11 by the exhaust pump 13 passes through the filter 12, and the solvent contained therein is adsorbed by the activated carbon 12b, filtered, and discharged to the outside.

그런데 이와 같은 구조에 있어서는, 사용횟수가 증가함에 따라 상기 활성탄(12b)이 포화상태가 되면 용제를 흡착하는 성능을 거의 잃어버리기 때문에, 여과성능을 유지하기 위해서는 여과기(12)를 수시로 교체해주어야 하는 단점이 있다. 따라서, 이러한 번거로움을 해결할 수 있는 배기장치가 요구되고 있다.However, in such a structure, as the number of times of use increases, since the activated carbon 12b becomes saturated, the performance of adsorbing the solvent is almost lost. Therefore, in order to maintain filtration performance, the filter 12 must be frequently replaced. There is this. Therefore, there is a need for an exhaust device that can solve such an inconvenience.

본 발명은 상기의 점을 감안하여 창출된 것으로서, 부품을 수시로 교체하지 않고도 배기가스 중의 용제를 제거해낼 수 있도록 개선된 습식 전자사진방식 프린터의 배기장치를 제공하는데 그 목적이 있다.SUMMARY OF THE INVENTION The present invention has been made in view of the above point, and an object of the present invention is to provide an exhaust device of a wet electrophotographic printer, which is capable of removing a solvent in exhaust gas without replacing parts at any time.

도 1은 종래 습식 전자사진방식 프린터의 배기장치를 개략적으로 보인 도면,1 is a view schematically showing an exhaust device of a conventional wet electrophotographic printer;

도 2는 본 발명의 제1실시예에 따른 습식 전자사진방식 프린터의 배기장치를 보인 도면,2 is a view showing an exhaust device of a wet electrophotographic printer according to a first embodiment of the present invention;

도 3a는 본 발명의 제2실시예에 따른 습식 전자사진방식 프린터의 배기장치를 보인 도면,3A is a view showing an exhaust device of a wet electrophotographic printer according to a second embodiment of the present invention;

도 3b는 도 3a의 A-A선을 따라 절단한 단면도.3B is a cross-sectional view taken along the line A-A of FIG. 3A.

〈 도면의 주요부분에 대한 부호의 설명 〉<Description of reference numerals for the main parts of the drawings>

100...프린터 본체 110...엔진셀100 ... printer body 110 ... engine cell

200...연소부 210...히터200.Combustion unit 210 ... Heater

220...백금촉매 300...열교환부220 platinum catalyst 300 heat exchanger

310...코일관부 320...냉각팬310. Coil pipe 320 Cooling fan

400...배기펌프400 ... exhaust pump

상기의 목적을 달성하기 위한 본 발명은, 프린터 본체 내부의 엔진셀로부터 외부로 향하는 공기의 유동경로를 형성하는 배기라인과, 상기 배기라인을 통해 상기 엔진셀로부터 공기를 흡입하여 외부로 배출하는 배기펌프와, 상기 배기펌프에 의해 흡입되어 나오는 공기 중 함유된 불순물을 제거하는 공기정화수단을 포함하는 습식 전자사진방식 프린터의 배기장치에 있어서, 상기 공기정화수단이 상기 배기라인을 통해 배기되는 공기를 가열 연소시킴으로써 그 공기중에 포함된 용제를 열분해시키는 연소부와, 상기 연소부 후단에 설치되어 가열된 공기를 냉각시키는 열교환부를 포함하는 것을 특징으로 한다.The present invention for achieving the above object, an exhaust line for forming a flow path of the air from the engine cell inside the printer body to the outside, and the exhaust to suck the air from the engine cell through the exhaust line to discharge to the outside An exhaust device of a wet electrophotographic printer comprising a pump and an air purifying means for removing impurities contained in air drawn in by the exhaust pump, wherein the air purifying means is configured to remove air exhausted through the exhaust line. And a heat exchanger installed at the rear end of the combustion section and cooling the heated air by pyrolyzing the solvent contained in the air by heat combustion.

이하 첨부된 도면을 참조하면서 본 발명에 따른 바람직한 실시예를 상세히 설명하기로 한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 2는 본 발명의 제1실시예에 따른 배기장치를 나타낸다.2 shows an exhaust device according to a first embodiment of the present invention.

도면을 참조하면, 엔진셀(110)로부터 프린터 본체(100) 외부를 향해 공기의 유동경로를 이루는 배기라인(L)이 마련되어 있고, 그 배기라인(L)의 중간에 공기를 흡입해내는 배기펌프(400)와, 흡입된 공기를 가열 연소시키는 연소부(200) 및, 가열된 공기를 다시 냉각시키는 열교환부(300)가 설치되어 있다. 참조부호 301은 분진필터를 나타낸다.Referring to the drawings, an exhaust line L, which forms a flow path of air from the engine cell 110 toward the outside of the printer main body 100, is provided, and an exhaust pump that sucks air in the middle of the exhaust line L is provided. 400, a combustion unit 200 for heating and burning the sucked air, and a heat exchange unit 300 for cooling the heated air again. Reference numeral 301 denotes a dust filter.

먼저 상기 연소부(200)는 전기에 의해 발열되는 히터(210)를 포함하여 구성된다. 이 히터(210)는 발열온도 1000∼1300℃ 정도를 유지할 수 있는 것으로 한다. 상기 배기라인(L)을 따라 이동하는 공기 중의 용제는 이 온도범위에서 다음의 화학식 1에 따라 수증기와 이산화탄소로 열분해된다.First, the combustion unit 200 is configured to include a heater 210 is generated by electricity. It is assumed that the heater 210 can maintain a heat generation temperature of about 1000 to 1300 ° C. The solvent in the air moving along the exhaust line (L) is pyrolyzed into water vapor and carbon dioxide according to the following formula (1) in this temperature range.

2C12H26(용제) + 37O2→ 24CO2+ 26H2O2C 12 H 26 (solvent) + 37O 2 → 24CO 2 + 26H 2 O

즉, C12H26성분인 용제를 산화시켜서 이산화탄소와 수증기로 분해시킨 후 배출하도록 하는 것이다. 그리고 상기 열교환부(300)에서는 이와 같이 가열된 공기를 다시 냉각시키게 되는데, 이를 위해서 열교환부(300)에는 배기라인(L)의 일부를 나선형으로 꼬아서 공기의 이동시간을 늘린 코일관부(310)가 마련되며, 이 코일관부(310)의 외벽에 냉각팬(320)이 바람을 송풍하여 열교환을 수행하게 된다. 한편, 선택적으로는 상기 코일관부(310) 대신에 배기라인의 외주에 냉각핀(fin)을 형성하여 냉각능을 높이도록 형성할 수도 있다.In other words, the solvent, which is a C 12 H 26 component, is oxidized to be decomposed into carbon dioxide and water vapor and then discharged. In the heat exchange part 300, the heated air is cooled again. To this end, the heat exchange part 300 spirally twists a part of the exhaust line L to increase the moving time of the air. Is provided, the cooling fan 320 blows the wind on the outer wall of the coil tube 310 to perform heat exchange. Alternatively, instead of the coil pipe part 310, a cooling fin may be formed on the outer circumference of the exhaust line to increase cooling ability.

이와 같이 열분해되고 다시 냉각된 공기는 상기 분진필터(301)를 통과한 후 프린터 본체(100) 외부로 배출된다. 그러므로 본원발명의 배기장치는, 활성탄에 용제를 흡착시키는 것이 아니라 소정 히터로 열분해시킨 후 배출하는 것이기 때문에, 종래와 같이 여과기 전체를 수시로 교체해야 하는 번거로움을 개선할 수 있다.As such, the pyrolyzed and cooled air is discharged to the outside of the printer body 100 after passing through the dust filter 301. Therefore, since the exhaust device of the present invention does not adsorb a solvent to the activated carbon, but is discharged after pyrolysis by a predetermined heater, it is possible to improve the trouble of frequently replacing the entire filter as in the prior art.

다음으로 도 3a 및 도 3b는 본 발명의 제2실시예에 따른 배기장치를 나타낸다.3A and 3B show an exhaust device according to a second embodiment of the present invention.

도면 중 전술한 제1실시예와 동일한 부재에 대해서는 동일한 부호를 부여하였다. 본 실시예에서는 상기 제1실시예와 달리, 연소부(200')의 히터(210') 주위에 백금촉매(220)를 설치하였다. 이 백금촉매(220)는 용제(C12H26)의 산화를 촉진시키므로, 히터(210')의 발열부하를 낮추는 효과가 있다. 따라서 이 백금촉매(220)를 설치하게 되면, 상기 히터(210')의 발열온도를 250∼300℃ 정도만 유지해도 용제가 열분해를 일으키게 된다.In the drawings, the same reference numerals are given to the same members as those of the first embodiment. In the present embodiment, unlike the first embodiment, the platinum catalyst 220 is installed around the heater 210 'of the combustion unit 200'. Since the platinum catalyst 220 promotes oxidation of the solvent (C 12 H 26 ), there is an effect of lowering the heat generation load of the heater 210 '. Therefore, when the platinum catalyst 220 is installed, the solvent may cause thermal decomposition even if the heat generation temperature of the heater 210 'is maintained at about 250 to 300 ° C.

그리고 상기 백금촉매(220)는 도 3b에 도시된 바와 같이 벌집형태로 형성하여, 공기가 쉽게 통과할 수 있고, 동시에 히터(210')로부터의 전열효율이 충분히 유지되도록 구성하는 것이 바람직하다.In addition, the platinum catalyst 220 may be formed in a honeycomb shape as shown in FIG. 3B to allow air to pass easily, and at the same time, to sufficiently maintain the heat transfer efficiency from the heater 210 '.

따라서 이 제2실시예에 따른 배기장치에 있어서는, 히터의 발열온도를 전술한 제1실시예에서 보다 상대적으로 낮은 온도로 유지하면서도 공기중의 용제를 충분히 분해시킬 수 있는 이점이 있다.Therefore, in the exhaust apparatus according to the second embodiment, there is an advantage that the solvent in the air can be sufficiently decomposed while maintaining the heat generation temperature of the heater at a relatively lower temperature than in the above-described first embodiment.

상술한 바와 같이 본 발명에 따른 습식 전자사진방식 프린터의 배기장치는, 용제를 활성탄과 같은 여과기로 흡착 제거하지 않고, 직접 수증기와 이산화탄소로 열분해하여 배출하기 때문에, 수시로 여과기를 교체해야 했던 번거로움을 해결할 수 있다.As described above, the exhaust device of the wet electrophotographic printer according to the present invention does not adsorb and remove the solvent with a filter such as activated carbon, but directly decomposes it with water vapor and carbon dioxide, thereby eliminating the need for frequent replacement of the filter. I can solve it.

본 발명은 상기에 설명되고 도면에 예시된 것에 의해 한정되는 것은 아니며, 다음에 기재되는 청구의 범위 내에서 더 많은 변형 및 변용예가 가능한 것임은 물론이다.It is to be understood that the invention is not limited to that described above and illustrated in the drawings, and that more modifications and variations are possible within the scope of the following claims.

Claims (4)

프린터 본체 내부의 엔진셀로부터 외부로 향하는 공기의 유동경로를 형성하는 배기라인과, 상기 배기라인을 통해 상기 엔진셀로부터 공기를 흡입하여 외부로 배출하는 배기펌프와, 상기 배기펌프에 의해 흡입되어 나오는 공기 중 함유된 불순물을 제거하는 공기정화수단을 포함하는 습식 전자사진방식 프린터의 배기장치에 있어서,An exhaust line for forming a flow path of air to the outside from the engine cell inside the printer main body, an exhaust pump that sucks air from the engine cell through the exhaust line and discharges it to the outside, and is sucked out by the exhaust pump In the exhaust device of a wet electrophotographic printer comprising an air purifying means for removing impurities contained in the air, 상기 공기정화수단은,The air purifying means, 상기 배기라인을 통해 배기되는 공기를 가열 연소시킴으로써 그 공기중에 포함된 용제를 열분해시키는 연소부와,Combustion unit for thermally decomposing the solvent contained in the air by heating and burning the air exhausted through the exhaust line, 상기 연소부 후단에 설치되어 가열된 공기를 냉각시키는 열교환부를 포함하는 것을 특징으로 하는 습식 전자사진방식 프린터의 배기장치.And a heat exchanger installed at the rear end of the combustion unit to cool the heated air. 제1항에 있어서,The method of claim 1, 상기 연소부는,The combustion unit, 상기 배기라인 내부에 설치되며 전기에 의해 발열하는 히터를 포함하는 것을 특징으로 하는 습식 전자사진방식 프린터의 배기장치.And an electric heater installed inside the exhaust line and generating heat by electricity. 제2항에 있어서,The method of claim 2, 상기 연소부는,The combustion unit, 상기 배기라인 내부의 상기 히터 주변에 설치되어 용제의 산화를 촉진시키는 백금촉매를 더 포함하는 것을 특징으로 하는 습식 전자사진방식 프린터의 배기장치.And a platinum catalyst installed around the heater in the exhaust line to promote oxidation of the solvent. 제1항에 있어서,The method of claim 1, 상기 열교환부는,The heat exchange unit, 공기의 이동경로가 길어지도록 상기 배기라인의 일부를 나선형으로 꼬아서 형성한 코일관부와,A coil pipe part formed by spirally twisting a part of the exhaust line so that a movement path of air is long; 상기 코일관부의 외벽에 바람을 송풍하는 냉각팬을 포함하는 것을 특징으로 하는 습식 전자사진방식 프린터의 배기장치.And a cooling fan for blowing air to the outer wall of the coil pipe part.
KR1019990006652A 1999-02-27 1999-02-27 Gas exhaustion apparatus for liquid electrophotographic printer KR100346693B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7079784B2 (en) 2004-01-08 2006-07-18 Samsung Electronics Co., Ltd. Wet type electrophotographic image forming apparatus and method for controlling oxidation catalyst device thereof
US7085511B2 (en) 2003-12-10 2006-08-01 Samsung Electronics Co., Ltd. Oxidation catalyst device and wet-type electro-photographic imageforming apparatus having the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7085511B2 (en) 2003-12-10 2006-08-01 Samsung Electronics Co., Ltd. Oxidation catalyst device and wet-type electro-photographic imageforming apparatus having the same
US7079784B2 (en) 2004-01-08 2006-07-18 Samsung Electronics Co., Ltd. Wet type electrophotographic image forming apparatus and method for controlling oxidation catalyst device thereof

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