WO2001062307A1 - Apparatus for removing chemical substance - Google Patents

Apparatus for removing chemical substance Download PDF

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Publication number
WO2001062307A1
WO2001062307A1 PCT/JP2001/001177 JP0101177W WO0162307A1 WO 2001062307 A1 WO2001062307 A1 WO 2001062307A1 JP 0101177 W JP0101177 W JP 0101177W WO 0162307 A1 WO0162307 A1 WO 0162307A1
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WIPO (PCT)
Prior art keywords
adsorbent
photocatalyst
chemical substance
activated carbon
chemical
Prior art date
Application number
PCT/JP2001/001177
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French (fr)
Japanese (ja)
Inventor
Shinichi Hara
Naoto Hayashi
Satoshi Tagawa
Kazuhiko Sakamoto
Original Assignee
Zexel Valeo Climate Control Corporation
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Publication date
Application filed by Zexel Valeo Climate Control Corporation filed Critical Zexel Valeo Climate Control Corporation
Publication of WO2001062307A1 publication Critical patent/WO2001062307A1/en

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Classifications

    • 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
    • B01D53/02—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 by adsorption, e.g. preparative gas chromatography
    • 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
    • A61L9/16—Disinfection, sterilisation or deodorisation of air using physical phenomena
    • 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
    • B01D53/8668—Removing organic compounds not provided for in B01D53/8603 - B01D53/8665
    • 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
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/25—Coated, impregnated or composite adsorbents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/80—Type of catalytic reaction
    • B01D2255/802—Photocatalytic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
    • B01D2257/702—Hydrocarbons
    • B01D2257/7022—Aliphatic hydrocarbons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
    • B01D2257/702—Hydrocarbons
    • B01D2257/7027—Aromatic hydrocarbons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
    • B01D2257/704—Solvents not covered by groups B01D2257/702 - B01D2257/7027
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/90—Odorous compounds not provided for in groups B01D2257/00 - B01D2257/708
    • 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

Definitions

  • the present invention relates to a chemical substance removing device used as a vehicle deodorizing device or the like.
  • deodorizers have been installed in the passages of air conditioning systems.
  • deodorizers There are two types of deodorizers: those that adsorb odorous substances (chemical substances) using an adsorbent such as activated carbon, and those that decompose odorous substances using a photocatalyst.
  • the adsorption type deodorizer the adsorption capacity of the adsorbent diminishes with time, so the life was short and the user had to replace it.
  • a deodorizer using a photocatalyst has a semipermanent decomposition capability and is maintenance-free, but its decomposition speed by the photocatalyst is extremely slow, making it difficult to decompose odorous substances that have entered the cabin in a short time. there were.
  • a deodorizer has been developed in which an adsorbent and a photocatalyst are mixed and supported on a filter or the like.
  • this deodorizing device most of the odorous substances are once adsorbed on an adsorbent, and the adsorbed odorous substances are decomposed by a photocatalyst over time.
  • the odor substance is adsorbed by the adsorbent, so that the odor substance can be deodorized in a short time, and the adsorbed odor substance is decomposed by the photocatalyst. Maintenance can be minimized.
  • a first adsorbent for adsorbing a chemical substance to be removed contained in air, a photocatalyst for decomposing the chemical substance, and a supporting means for supporting the first adsorbent and the photocatalyst are provided.
  • the supporting means also carries a second adsorbent having a higher adsorbing ability for a by-product generated by the decomposition of the chemical substance than the first adsorbent.
  • the chemical substance to be removed is adsorbed by the first adsorbent and decomposed by the photocatalyst, and the by-product is also adsorbed by the second adsorbent and decomposed by the photocatalyst. Not only by-products but also by-products can be removed well.
  • an air passage is further provided, and in the air passage, the carrying means is arranged, and a blowing means is arranged.
  • the support means is formed of a single support, and the support carries the first and second adsorbents and a photocatalyst. According to this aspect, chemical substances and by-products can be removed with a simple configuration.
  • the support means includes first and second support members arranged in order from upstream to downstream of the air passage, and the first support body includes the first adsorbent. And a photocatalyst, and the second support carries the second adsorbent and the photocatalyst. According to this aspect, chemical substances and by-products can be more efficiently removed.
  • the support means includes first and second support members arranged in order from the upstream to the downstream of the air passage, and the first and second support members are respectively provided on the support members.
  • adsorbent and a photocatalyst are carried, the first carrier carries more of the first adsorbent than the second adsorbent, and the second carrier carries more of the second adsorbent than the first adsorbent.
  • chemical substances and by-products can be more efficiently removed.
  • a method for exciting a photocatalyst between the first and second supports A light source is installed. According to this aspect, the light source can be shared for the photocatalysts of the two carriers, and the configuration can be simplified.
  • the first adsorbent is untreated activated carbon having a high adsorption efficiency for an organic compound as a chemical substance to be removed, and the second adsorbent is for an aldehyde as a by-product.
  • Activated carbon impregnated with high adsorption efficiency According to this aspect, the organic compound and its by-product can be removed using inexpensive activated carbon.
  • FIG. 1 is a schematic cross-sectional view showing a vehicle air conditioner incorporating a deodorizing device according to a first embodiment of the present invention.
  • FIG. 2 is an enlarged sectional view of a main part of a deodorizing unit filter in the deodorizing apparatus.
  • FIG. 3 is a cross-sectional view showing a further enlarged part m in FIG.
  • FIG. 4 is a schematic sectional view showing a deodorizing unit according to the second embodiment of the present invention.
  • FIG. 5 is an enlarged sectional view of a main part of the filter of the deodorizing unit.
  • FIGS. Figure 1 shows a vehicle air conditioner.
  • the air conditioner includes a duct 1, an outside air switching door 2 arranged in order from an upstream end to a downstream in an air passage 1a in the duct 1, a blower 3 (blowing means), and a deodorizing unit 1.
  • the temperature control means 4 includes an evaporator 5 for cooling the passing air, a heater core 6 for ripening the passing air, and an air mixing door 7.
  • the downstream end of the air passage 1a is connected to the passenger compartment through the outlet.
  • the air passage la, the blower 3 and the deodorizing unit 10 constitute a deodorizing device (chemical substance removing device) of the present invention.
  • the deodorizing unit 10 is composed of a frame 11 and a filter 12 (supporting means comprising a single supporting body) made of a pleated nonwoven fabric supported on the frame 11. And a straight tube-shaped ultraviolet lamp 13 (light source) that is supported by the frame 11 and extends in a direction perpendicular to the paper surface.
  • the untreated activated carbon 15 (first adsorbent), the impregnated activated carbon 16 (second adsorbent), and the photocatalyst 17 are supported on the filter 12 as shown exaggeratedly in FIGS. Being done.
  • the above-mentioned impregnated activated carbon 16 is also called impregnated impregnated activated carbon, which is immersed in a solution of chemicals and dried, and the physical adsorption performance of activated carbon is reduced, but the chemical adsorption performance of the impregnated chemicals is obtained.
  • the impregnated activated carbon 16 is obtained by immersing and drying the activated carbon in a phosphoric acid solution in order to obtain a particularly high adsorption capacity for aldehydes.
  • the untreated activated carbon 15 refers to activated carbon which is not subjected to impregnation and impregnation treatment, and has an adsorption ability by physical adsorption.
  • the untreated activated carbon has a high adsorption ability for hydrocarbons (organic compounds) such as toluene. It is used with attention.
  • titanium oxide is used as the photocatalyst 17.
  • the method for supporting the activated carbons 15 and 16 and the photocatalyst 17 is not particularly limited.
  • the method is performed as follows. A sol in which the photocatalyst 17 is dispersed in a hydroxide solution is sprayed onto the mixed granular activated carbons 15 and 16 with a spray and baked at a low temperature to convert the photocatalyst 17 into activated carbon 15 , 16 Then, the activated carbons 15 and 16 to which the photocatalyst 17 is attached are supported on the filter 12 with an adhesive. After the photocatalyst 17 is attached to one of the activated carbons 15 and 16, the photocatalyst 17 may be mixed with the other of the activated carbons 15 and 16 and supported on the filter 12.
  • good deodorizing ability can be exhibited over a long period of time for ordinary odorous substances by combining untreated activated carbon 15 and photocatalyst 17 as in the conventional case. Further, in the present embodiment, as described in detail below, excellent deodorizing ability can be exhibited also with respect to exhaust gas.
  • exhaust gas In places with heavy traffic, the concentration of exhaust gas in the air is high, and exhaust gas enters the vehicle cabin even when air conditioning is performed not only in the state of introducing outside air but also in the state of internal air circulation.
  • This exhaust gas mainly contains hydrocarbons (organic compounds and chemicals) such as benzene, benzene, pendant and xylene.
  • the odorous substances composed of these hydrocarbons are adsorbed on the activated carbons 15 and 16 supported on the filter 12.
  • the adsorption capacity of the untreated activated carbon 15 for hydrocarbons is higher than that of the impregnated activated carbon 16, and the untreated activated carbon 15 is mainly responsible for the adsorption of hydrocarbons.
  • the hydrocarbons adsorbed on the untreated activated carbons 15 and 16 are decomposed by the photocatalyst 17 excited by the ultraviolet lamp 13 and are decomposed into smaller molecules. Most of this decomposition product is carbon dioxide, but it also contains aldehydes (by-products) such as formaldehyde diacetaldehyde.
  • the newly generated aldehyde is not well adsorbed on untreated activated carbon 15.
  • the impregnated activated carbon 16 is also supported on the filter 12, and the aldehyde can be adsorbed by the impregnated activated carbon .16.
  • the adsorbed aldehyde is decomposed by the photocatalyst 17 to finally become carbon dioxide.
  • the hydrocarbons in the exhaust gas are mainly adsorbed on the untreated activated carbon 15 and decomposed by the photocatalyst 17, and the by-product aldehyde is also mainly adsorbed on the impregnated activated carbon 16 and the photocatalyst 17 As a result, a good deodorizing effect can be exhibited.
  • Untreated impregnated photocatalytic Tonoreen co 2 aldehyde other activated carbon activated carbon removal rate incidence incidence material 1 9 0 0 1 0 7 5% 6 0% 3 0% 1 0% material 2 67.5 22.5 1 0 7 2% 8 9 % 5% 6% Material 3 4 5 4 5 1 0 7 1% 9 0% 3% 7% Material 4 22.5 67.5 1 0 6 8% 9 2% 1% 7% Material 5 0 9 0 1 0 4 5% 9 0% 0% 10%
  • Table 1 above untreated activated carbon, impregnated activated carbon, and photocatalyst of various mixed materials are shown by weight%.
  • the toluene removal rate is obtained by comparing the toluene concentration on the upstream side with the toluene concentration on the downstream side. For example, when the downstream toluene concentration is 0.5 ppm with respect to the upstream toluene concentration of 2 ppm, the toluene removal rate is 75%.
  • Table 1 the rates of carbon dioxide, aldehydes, and other emissions are expressed in terms of carbon atoms. That is, it shows how the carbon atoms of the removed toluene are distributed to the above three forms downstream of the deodorizing unit 10. Therefore, the occurrence rate may be interpreted as a distribution rate in terms of carbon atoms.
  • toluene is represented by the chemical formula C 7 H 8 and contains 7 carbon atoms
  • 2 ppm of toluene becomes 14 pp xn in terms of carbon atom concentration.
  • carbon dioxide has one carbon atom, for example, if 8.4 ppm of carbon dioxide is measured, the carbon atom equivalent concentration in carbon dioxide is also 8.4 ppm, which is the above carbon atom equivalent concentration of toluene. Dividing by ppm gives a carbon dioxide emission rate of 60%.
  • formaldehyde is represented by the formula HCHO and contains one carbon atom, so 1 ppm of formaldehyde is 1 ppm in terms of carbon atom concentration.
  • Acetaldehyde is represented by the chemical formula CH 3 CH 0 and contains two carbon atoms, so 1 ppm of acetoaldehyde is 2 ppm in terms of carbon atoms.
  • FIGS. 4 and 5 show a second embodiment of the present invention.
  • the deodorizing unit 10 ′ of this embodiment is incorporated in an air conditioner instead of the deodorizing unit 10 of the first embodiment, and the frame 11 ′ has the first and the first in order from the upstream side to the downstream side.
  • Second filters 12A and 12B (first and second carriers) are supported.
  • Upper and lower two ultraviolet lamps 13 are arranged between the filters 12A and 12B.
  • An untreated activated carbon 15 and a photocatalyst 17 are supported on the first filter 12A on the upstream side.
  • an impregnated activated carbon 16 and a photocatalyst 17 are arranged.
  • the untreated activated carbon 15 adsorbs mainly hydrocarbons such as toluene in the upstream first filter 12A, and the photocatalyst 17 decomposes the hydrocarbons.
  • Decomposition by-products such as aldehydes are not adsorbed so much by the first filter 12A, but are adsorbed by the impregnated activated carbon 16 in the downstream second filter 12B and decomposed by the photocatalyst 17.
  • the intermediate ultraviolet lamp 13 excites the photocatalysts of both filters 12A and 12B.
  • the roles are shared by the two filters 12A and 12B, and the by-products that cannot be completely captured by the upstream first filter 12A are removed by the downstream second filter 1A. 2 B can be reliably captured and decomposed.
  • both of the two types of activated carbon 15 and 16 and the photocatalyst 17 may be supported on both of the two filters 12A and 12B.
  • the first filter 12A carries more untreated activated carbon 15 than the impregnated activated carbon 16
  • the second filter 12B carries more impregnated activated carbon 16 than the untreated activated carbon 15
  • a deodorizing effect equivalent to the form can be obtained.
  • zeolite or the like may be used instead of untreated activated carbon. Further, zinc oxide or the like may be used as the photocatalyst.
  • the light source may be in the form of an LED instead of a lamp.
  • the filter may be a honeycomb type instead of a pre-type. Industrial applicability
  • the present invention is not limited to the vehicle air conditioner, but may be used for other purposes.
  • it can be used to decompose ethylene (hydrocarbons, organic compounds).
  • ethylene hydrocarbons, organic compounds
  • aldehydes as decomposition by-products. If such a device for removing ethylene is provided in the fruit storage room, the ripening of the fruit can be delayed.
  • the present invention may be applied to an apparatus for removing a chemical substance emitted from house building materials in a house.

Abstract

An apparatus for removing chemical substances, wherein untreated active carbon (15) as a first adsorbent, an impregnated active carbon (16) as a second adsorbent and a photocatalyst (17) are carried on a filter (12) as a carrying means. Hydrocarbons (organic compounds) such as toluene are adsorbed on the untreated active carbon (15) and then decomposed by the photocatalyst, and aldehydes which are by-produced by the decomposition reaction of the hydrocarbons are adsorbed on the impregnated active carbon (16) and then decomposed by the photocatalyst.

Description

明 細 書  Specification
化学物質除去装置 技術分野 Chemical removal equipment Technical field
本発明は、 車両の脱臭装置等として用いられる化学物質除去装置に関する。 背景技術  The present invention relates to a chemical substance removing device used as a vehicle deodorizing device or the like. Background art
近年、 快適性向上のために車室内脱臭の要求が高まっており、 この要求に答え るために、 空調システムの通路内に脱臭装置が配置されている。 脱臭装置には、 活性炭等の吸着剤を用いて臭気物質 （化学物質） を吸着するタイプと、 光触媒を 用いて臭気物質を分解するタイプとがある。 吸着タイプの脱臭装置では、 吸着剤 の吸着能力が時間とともに減衰するため寿命が短くユーザーによる交換が必要で あった。 他方、 光触媒を用いた脱臭装置では、 分解能力が半永久的でメンテナン スフリ一ではあるが、 光触媒による分解速度が非常に遅く、 車室内に入り込んで きた臭気物質を短時間で分解するのが困難であった。  In recent years, there has been an increasing demand for interior deodorization to improve comfort. To meet this demand, deodorizers have been installed in the passages of air conditioning systems. There are two types of deodorizers: those that adsorb odorous substances (chemical substances) using an adsorbent such as activated carbon, and those that decompose odorous substances using a photocatalyst. In the case of the adsorption type deodorizer, the adsorption capacity of the adsorbent diminishes with time, so the life was short and the user had to replace it. On the other hand, a deodorizer using a photocatalyst has a semipermanent decomposition capability and is maintenance-free, but its decomposition speed by the photocatalyst is extremely slow, making it difficult to decompose odorous substances that have entered the cabin in a short time. there were.
そこで.、 特許 2 5 7 4 8 4 0号公報に開示されているように、 吸着剤と光触媒 を混合してフィルタ等に担持させた脱臭装置が開発されている。 この脱臭装置で は、 臭気物質の大部分を吸着剤に一旦吸着させ、 この吸着した臭気物質を時間を かけて光触媒で分解するものである。 この装置によれば、 吸着剤で臭気物質を吸 着するので、 短時間での脱臭が可能であり、 しかも吸着された臭気物質を光触媒 で分解するので、 吸着剤の吸着能力が減衰せず、 メンテナンスを最小限にするこ とができる。  Therefore, as disclosed in Japanese Patent No. 2574840, a deodorizer has been developed in which an adsorbent and a photocatalyst are mixed and supported on a filter or the like. In this deodorizing device, most of the odorous substances are once adsorbed on an adsorbent, and the adsorbed odorous substances are decomposed by a photocatalyst over time. According to this device, the odor substance is adsorbed by the adsorbent, so that the odor substance can be deodorized in a short time, and the adsorbed odor substance is decomposed by the photocatalyst. Maintenance can be minimized.
しかし、 上記吸着剤と光触媒を有する脱臭装置では、 臭気物質が光触媒で分解 された時に副生成物が生じ、 この副生成物自体が新たな臭気物質となって車室内 環境を悪化させることがあった。 詳述すると、 交差点やトンネル等の交通量の多 い場所では、 車室内に排ガスが入り込む。 この排ガスは主たる臭気物質としてト ルェン等の炭化水素 （有機化合物） を含んでいる。 トルエンは吸着剤としての活 性炭に吸着され、光触媒で分解されることにより、大部分は二酸化炭素となるが、 副生成物としてアルデヒドも生成される。 このアルデヒドが新たな臭気物質とな るため脱臭の効果が損なわれてしまうのである。 However, in the deodorizing device having the adsorbent and the photocatalyst, when the odorous substance is decomposed by the photocatalyst, a by-product is generated, and the by-product itself becomes a new odorous substance, which may degrade the environment in the cabin. Was. More specifically, exhaust gas enters the cabin at places with heavy traffic such as intersections and tunnels. This exhaust gas contains hydrocarbons (organic compounds) such as toluene as the main odorous substances. Toluene is adsorbed on activated charcoal as an adsorbent and decomposed by a photocatalyst, mostly to carbon dioxide, but aldehydes are also generated as by-products. This aldehyde becomes a new odorant Therefore, the deodorizing effect is impaired.
上記のような脱臭装置の課題は、 車両用以外の脱臭装置や、 さらに空気中の化 学物質を除去する各種装置にも存在する。 発明の開示  The problems of the deodorizer described above also exist in deodorizers other than those used for vehicles, and also in various devices that remove chemical substances from the air. Disclosure of the invention
本発明の 1つの態様では、 空気中に含まれる除去対象の化学物質を吸着する第 1吸着剤と、 この化学物質を分解する光触媒と、 これら第 1吸着剤および光触媒 を担持する担持手段とを備えた化学物質除去装置において、 上記担持手段には、 上記化学物質の分解により生じた副生成物に対する吸着能力が第 1吸着剤より高 い第 2吸着剤をも担持させる。 これにより、 除去対象となる化学物質は、 第 1吸 着剤に吸着されて光触媒により分解され、 副生成物も第 2吸着剤に吸着されて光 触媒により分解されるので、 除去対象の化学物質のみならず副生成物をも良好に 除去できる。  In one embodiment of the present invention, a first adsorbent for adsorbing a chemical substance to be removed contained in air, a photocatalyst for decomposing the chemical substance, and a supporting means for supporting the first adsorbent and the photocatalyst are provided. In the chemical substance removing device provided, the supporting means also carries a second adsorbent having a higher adsorbing ability for a by-product generated by the decomposition of the chemical substance than the first adsorbent. As a result, the chemical substance to be removed is adsorbed by the first adsorbent and decomposed by the photocatalyst, and the by-product is also adsorbed by the second adsorbent and decomposed by the photocatalyst. Not only by-products but also by-products can be removed well.
本発明の他の態様では、 さらに空気通路を備え、 この空気通路に、 上記担持手 段を配置するとともに、 送風手段を配置している。 この態様によれば、 送風手段 を用いることにより、 効率良く迅速に化学物質および副生成物を除去できる。 本発明のさらに他の態様では、 上記担持手段は単一の担持体からなり、 この担 持体に、上記第 1 , 第 2の吸着剤と光触媒を担持させている。 この態様によれば、 簡単な構成で化学物質およぴ副生成物を除去できる。  In another aspect of the present invention, an air passage is further provided, and in the air passage, the carrying means is arranged, and a blowing means is arranged. According to this aspect, by using the air blowing means, chemical substances and by-products can be efficiently and quickly removed. In still another embodiment of the present invention, the support means is formed of a single support, and the support carries the first and second adsorbents and a photocatalyst. According to this aspect, chemical substances and by-products can be removed with a simple configuration.
本発明のさらに他の態様では、 上記担持手段は、 空気通路の上流から下流に向 かって順に配置された第 1 , 第 2の担持体を有し、 第 1担持体には上記第 1吸着 剤と光触媒を担持させ、 第 2担持体には上記第 2吸着剤と光触媒を担持させてい. る。 この態様によれば、より一層効率良く化学物質および副生成物を除去できる。 本発明のさらに他の態様では、 上記担持手段は、 空気通路の上流から下流に向 かって順に配置された第 1 , 第 2の担持体を有し、 各担持体には上記第 1 , 第 2 吸着剤と光触媒を担持させ、 第 1担持体では第 1吸着剤を第 2吸着剤より多く担 持させ、 第 2担持体では上記第 2吸着剤を第 1吸着剤より多く担持させている。 この態様によれば、 より一層効率良く化学物質およぴ副生成物を除去できる。 本発明のさらに他の態様では、 上記第 1， 第 2担持体間に光触媒を励起するた めの光源を配置している。 この態様によれば、 2つの担持体の光触媒のために、 光源を共有することができ、 構成を簡略化することができる。 In still another aspect of the present invention, the support means includes first and second support members arranged in order from upstream to downstream of the air passage, and the first support body includes the first adsorbent. And a photocatalyst, and the second support carries the second adsorbent and the photocatalyst. According to this aspect, chemical substances and by-products can be more efficiently removed. In still another aspect of the present invention, the support means includes first and second support members arranged in order from the upstream to the downstream of the air passage, and the first and second support members are respectively provided on the support members. An adsorbent and a photocatalyst are carried, the first carrier carries more of the first adsorbent than the second adsorbent, and the second carrier carries more of the second adsorbent than the first adsorbent. According to this aspect, chemical substances and by-products can be more efficiently removed. In still another embodiment of the present invention, there is provided a method for exciting a photocatalyst between the first and second supports. A light source is installed. According to this aspect, the light source can be shared for the photocatalysts of the two carriers, and the configuration can be simplified.
本発明のさらに他の態様では、 上記第 1吸着剤が、 除去対象の化学物質として の有機化合物に対する吸着効率の高い未処理活性炭であり、 上記第 2吸着剤が、 副生成物としてのアルデヒドに対する吸着効率の高い添着活性炭である。 この態 様によれば、 有機化合物とその副生成物を安価な活性炭を用いて除去することが できる。 図面の簡単な説明  In still another embodiment of the present invention, the first adsorbent is untreated activated carbon having a high adsorption efficiency for an organic compound as a chemical substance to be removed, and the second adsorbent is for an aldehyde as a by-product. Activated carbon impregnated with high adsorption efficiency. According to this aspect, the organic compound and its by-product can be removed using inexpensive activated carbon. BRIEF DESCRIPTION OF THE FIGURES
図 1は、 本発明の第 1実施形態に係わる脱臭装置を組み込んだ車両用空調装置 を示す概略断面図である。  FIG. 1 is a schematic cross-sectional view showing a vehicle air conditioner incorporating a deodorizing device according to a first embodiment of the present invention.
図 2は、同脱臭装置における脱臭ュニットのフィルタの要部拡大断面図である。 図 3は、 図 2における m部をさらに拡大して示す断面図である。  FIG. 2 is an enlarged sectional view of a main part of a deodorizing unit filter in the deodorizing apparatus. FIG. 3 is a cross-sectional view showing a further enlarged part m in FIG.
図 4は、本発明の第 2実施形態に係わる脱臭ュニットを示す概略断面図である。 図 5は、 同脱臭ュニットのフィルタの要部拡大断面図である。 発明を実施するための最良の形態  FIG. 4 is a schematic sectional view showing a deodorizing unit according to the second embodiment of the present invention. FIG. 5 is an enlarged sectional view of a main part of the filter of the deodorizing unit. BEST MODE FOR CARRYING OUT THE INVENTION
以下、 本発明の第 1の実施形態に係わる車両用脱臭装置について、 図 1〜図 3 を参照しながら説明する。 図 1は車両用空調装置を示す。 この空調装置は、 ダク ト 1と、 このダクト 1内の空気通路 1 aに上流端から下流に向かって順に配置さ れた內外気切り換えドア 2と、 ブロア 3 (送風手段） と、 脱臭ユニット 1 0と、 温度調節手段 4とを有している。 温度調節手段 4は周知のように、 通過空気を冷 却するェパポレータ 5と、 通過空気を加熟するヒータコア 6と、 エアミックスド ァ 7とを有している。 空気通路 1 aの下流端は吹き出し口を介して車室内に連な つている。  Hereinafter, a vehicle deodorizing apparatus according to a first embodiment of the present invention will be described with reference to FIGS. Figure 1 shows a vehicle air conditioner. The air conditioner includes a duct 1, an outside air switching door 2 arranged in order from an upstream end to a downstream in an air passage 1a in the duct 1, a blower 3 (blowing means), and a deodorizing unit 1. 0 and temperature control means 4. As is well known, the temperature control means 4 includes an evaporator 5 for cooling the passing air, a heater core 6 for ripening the passing air, and an air mixing door 7. The downstream end of the air passage 1a is connected to the passenger compartment through the outlet.
上記空気通路 l aと、 ブロア 3と、 脱臭ユニット 1 0とで、 本発明の脱臭装置 (化学物質除去装置） が構成されている。  The air passage la, the blower 3 and the deodorizing unit 10 constitute a deodorizing device (chemical substance removing device) of the present invention.
脱臭ュニット 1 0は、 フレーム 1 1と、 このフレーム 1 1に支持されたプリ一 ッ形状の不織布からなるフィルタ 1 2 (単一の担持体からなる担持手段） と、 同 じくフレーム 1 1に支持されて紙面と直交する方向に延びる直管形状の紫外線ラ ンプ 1 3 (光源） とを備えている。 The deodorizing unit 10 is composed of a frame 11 and a filter 12 (supporting means comprising a single supporting body) made of a pleated nonwoven fabric supported on the frame 11. And a straight tube-shaped ultraviolet lamp 13 (light source) that is supported by the frame 11 and extends in a direction perpendicular to the paper surface.
上記フィルタ 1 2には、 図 2 , 図 3に誇張して示すように、 未処理活性炭 1 5 (第 1吸着剤） と、 添着活性炭 1 6 (第 2吸着剤） と、 光触媒 1 7が担持されて レヽる。  The untreated activated carbon 15 (first adsorbent), the impregnated activated carbon 16 (second adsorbent), and the photocatalyst 17 are supported on the filter 12 as shown exaggeratedly in FIGS. Being done.
上記添着活性炭 1 6は、 含浸添着活性炭とも称し、 化学薬品の溶液に漬けて乾 燥処理したものであり、 活性炭の物理吸着性能は減じられるが、 添着された化学 薬品による化学吸着性能が得られる。 本実施形態では特にアルデヒドに対する高 い吸着能力を得るために、 活性炭を燐酸溶液に浸漬乾燥させることにより、 添着 活性炭 1 6を得ている。  The above-mentioned impregnated activated carbon 16 is also called impregnated impregnated activated carbon, which is immersed in a solution of chemicals and dried, and the physical adsorption performance of activated carbon is reduced, but the chemical adsorption performance of the impregnated chemicals is obtained. . In the present embodiment, the impregnated activated carbon 16 is obtained by immersing and drying the activated carbon in a phosphoric acid solution in order to obtain a particularly high adsorption capacity for aldehydes.
上記未処理活性炭 1 5は、 含浸添着処理をしない活性炭を意味し、 物理吸着に よる吸着能力を有するものであり、本実施形態では特にトルェン等の炭化水素（有 機化合物） に対する高い吸着能力に着目して用いている。  The untreated activated carbon 15 refers to activated carbon which is not subjected to impregnation and impregnation treatment, and has an adsorption ability by physical adsorption. In the present embodiment, particularly, the untreated activated carbon has a high adsorption ability for hydrocarbons (organic compounds) such as toluene. It is used with attention.
また、 光触媒 1 7としては酸化チタンを用いている。  In addition, titanium oxide is used as the photocatalyst 17.
上記活性炭 1 5 , 1 6および光触媒 1 7の担持方法は、 特に限定しないが、 例 えば次のようにして行う。 光触媒 1 7を水酸化物の溶液中に分散させたゾル状態 のものを、 混合された粒状の活性炭 1 5 , 1 6に、 スプレーで吹き付けて低温で 焼くことにより、 光触媒 1 7を活性炭 1 5 , 1 6に付着させる。 そして、 この光 触媒 1 7を付着した活性炭 1 5 , 1 6を接着剤でフィルタ 1 2に担持させる。 な お、 光触媒 1 7を活性炭 1 5 , 1 6のいずれか一方に付着させた後で、 活性炭 1 5 , 1 6の他方と混合してフィルタ 1 2に担持させてもよい。  The method for supporting the activated carbons 15 and 16 and the photocatalyst 17 is not particularly limited. For example, the method is performed as follows. A sol in which the photocatalyst 17 is dispersed in a hydroxide solution is sprayed onto the mixed granular activated carbons 15 and 16 with a spray and baked at a low temperature to convert the photocatalyst 17 into activated carbon 15 , 16 Then, the activated carbons 15 and 16 to which the photocatalyst 17 is attached are supported on the filter 12 with an adhesive. After the photocatalyst 17 is attached to one of the activated carbons 15 and 16, the photocatalyst 17 may be mixed with the other of the activated carbons 15 and 16 and supported on the filter 12.
上記構成をなす空調装置の作用について説明する。 ダクト 1の上流端から導入 された空気 （外気または車室からの循環内気） は、 ブロア 3により空気通路 1 a 内を流れ、 脱臭ュニット 1 0で脱臭され、 温度調節手段 4で所望温度にされて吹 き出し口から車室内に吹き出される。  The operation of the air conditioner having the above configuration will be described. The air (outside air or circulating air from the passenger compartment) introduced from the upstream end of the duct 1 flows through the air passage 1 a by the blower 3, is deodorized by the deodorizing unit 10, and is adjusted to a desired temperature by the temperature control means 4. From the air outlet.
本実施形態では、 通常の臭気物質について、 従来と同様に未処理活性炭 1 5と 光触媒 1 7の組み合わせにより、 長期にわたって良好な脱臭能力を発揮すること ができる。 さらに本実施形態では、 以下に詳述するように、 排ガスについても良 好な脱臭能力を発揮することができる。 交通量の多い場所では空気中の排ガス濃度が高く、外気を導入状態のみならず、 内気循環状態で空調を行っている場合であっても、 車室内に排ガスが侵入する。 この排ガスは、 主としてト ェン、 その他ベンゼン， ペンダン， キシレン等の炭 化水素 （有機化合物， 化学物質） を含んでいる。 これら炭化水素からなる臭気物 質は、 フィルタ 1 2に担持された活性炭 1 5、 1 6に吸着される。 なお、 未処理 活性炭 1 5の炭化水素に対する吸着能力は添着活性炭 1 6より高く、 この未処理 活性炭 1 5が主となって炭化水素の吸着を担う。 これら未処理活性炭 1 5、 1 6 に吸着された炭化水素は、 紫外線ランプ 1 3によって励起された光触媒 1 7によ り分解され、 より分子量の小さな分子に分解される。 この分解生成物の大部分は、 二酸化炭素であるが、 ホルムアルデヒ ドゃァセトアルデヒ ド等のアルデヒ ド （副 生成物） も含まれている。 In the present embodiment, good deodorizing ability can be exhibited over a long period of time for ordinary odorous substances by combining untreated activated carbon 15 and photocatalyst 17 as in the conventional case. Further, in the present embodiment, as described in detail below, excellent deodorizing ability can be exhibited also with respect to exhaust gas. In places with heavy traffic, the concentration of exhaust gas in the air is high, and exhaust gas enters the vehicle cabin even when air conditioning is performed not only in the state of introducing outside air but also in the state of internal air circulation. This exhaust gas mainly contains hydrocarbons (organic compounds and chemicals) such as benzene, benzene, pendant and xylene. The odorous substances composed of these hydrocarbons are adsorbed on the activated carbons 15 and 16 supported on the filter 12. The adsorption capacity of the untreated activated carbon 15 for hydrocarbons is higher than that of the impregnated activated carbon 16, and the untreated activated carbon 15 is mainly responsible for the adsorption of hydrocarbons. The hydrocarbons adsorbed on the untreated activated carbons 15 and 16 are decomposed by the photocatalyst 17 excited by the ultraviolet lamp 13 and are decomposed into smaller molecules. Most of this decomposition product is carbon dioxide, but it also contains aldehydes (by-products) such as formaldehyde diacetaldehyde.
新たに発生したアルデヒドは未処理活性炭 1 5には良好に吸着されない。 しか し、 本実施形態ではフィルタ 1 2に添着活性炭 1 6も担持されており、 この添着 活性炭.1 6によりアルデヒドを吸着することができる。 この吸着されたアルデヒ ドは、 光触媒 1 7によって分解され最終的に二酸化炭素になる。  The newly generated aldehyde is not well adsorbed on untreated activated carbon 15. However, in the present embodiment, the impregnated activated carbon 16 is also supported on the filter 12, and the aldehyde can be adsorbed by the impregnated activated carbon .16. The adsorbed aldehyde is decomposed by the photocatalyst 17 to finally become carbon dioxide.
上述したように、 排ガス中の炭化水素は、 主として未処理活性炭 1 5に吸着さ れて光触媒 1 7により分解され、 副生成物であるアルデヒドも主として添着活性 炭 1 6に吸着されて光触媒 1 7により分解されるので、 良好な脱臭効果を発揮す ることができる。  As described above, the hydrocarbons in the exhaust gas are mainly adsorbed on the untreated activated carbon 15 and decomposed by the photocatalyst 17, and the by-product aldehyde is also mainly adsorbed on the impregnated activated carbon 16 and the photocatalyst 17 As a result, a good deodorizing effect can be exhibited.
次に、 上記脱臭ュニット 1 0を用いた実験について説明する。 活性炭 1 5 , 1 6と光触媒 1 7を混合した材料を、 不織布からなるフィルタ 1 2に 2 0 0 g Zm 2の密度で接着した。 このフィルタ 1 2に紫外線ランプ 1 3から 3 6 5 n mの紫 外線をあてた状態で、 脱臭ユニット 1 0の上流側から、 二酸化炭素を除去した空 気中にトルエンを常時 2 p p mになるように流した。 実験は 5種類の混合材料に ついて行い、下流側の各種ガス濃度を計測したところ下記表 1の結果が得られた。 【表 1】 Next, an experiment using the deodorizing unit 10 will be described. A material obtained by mixing activated carbons 15 and 16 and a photocatalyst 17 was bonded to a filter 12 made of a nonwoven fabric at a density of 200 g Zm 2 . With an ultraviolet lamp of 13 to 365 nm applied to this filter 12 from the upstream side of the deodorizing unit 10, toluene was constantly adjusted to 2 ppm in the air from which carbon dioxide had been removed. Shed. The experiment was performed on five types of mixed materials, and the various gas concentrations on the downstream side were measured. The results in Table 1 below were obtained. 【table 1】
未処理 添着 光触媒 トノレェン co2 アルデヒ ド その他 活性炭 活性炭 除去率 発生率 発生率 発生率 材料 1 9 0 0 1 0 7 5 % 6 0 % 3 0 % 1 0 % 材料 2 67.5 22.5 1 0 7 2 % 8 9 % 5 % 6 % 材料 3 4 5 4 5 1 0 7 1 % 9 0 % 3 % 7 % 材料 4 22.5 67.5 1 0 6 8 % 9 2 % 1 % 7 % 材料 5 0 9 0 1 0 4 5 % 9 0 % 0% 1 0 % 上記表 1において、各種混合材料の未処理活性炭、添着活性炭，光触媒は重量％ で示す。 トルエン除去率は、 上流側のトルエン濃度と下流側のトルエン濃度を比 較することにより得られる。 例えば、 上流側のトルエン濃度 2 p p mに対して下 流側のトルエン濃度が 0. 5 p p mの場合には、 トルエン除去率は 7 5 %となる。 また表 1において、 二酸化炭素， アルデヒド， その他の発生率は、 炭素原子換 算で表している。 すなわち、 除去されたトルエンの炭素原子が脱臭ユニット 1 0 の下流側で上記 3つの形態にどのように分配されるかを示している。したがって、 上記発生率は、 炭素原子換算での分配率と解釈してもよい。 より具体的に説明す ると、 トルエンは化学式 C7H8で表され， 炭素原子を 7個含んでいるから、 トル ェン 2 p p mは炭素原子換算濃度で 1 4 p p xnとなる。 二酸化炭素の炭素原子は 1つであるから、 例えば二酸化炭素を 8. 4 p p m計測した場合、 二酸化炭素に おける炭素原子換算濃度も 8. 4 p p mとなり、 これを上記トルエンの炭素原子 換算濃度 1 4 p p mで除すことにより、 二酸化炭素の発生率 6 0 %が得られる。 ちなみに、 ホルムアルデヒドは化学式 HCHOで表され、 炭素原子を 1個含んで いるから、ホルムアルデヒド 1 p p mは、炭素原子換算濃度でも 1 p p mである。 アトアルデヒドは、 化学式 CH3CH 0で表され、 炭素原子を 2個含んでいるか ら、 ァセトアルデヒド 1 p p mは、 炭素原子換算濃度で 2 p p mとなる。 Untreated impregnated photocatalytic Tonoreen co 2 aldehyde other activated carbon activated carbon removal rate incidence incidence incidence material 1 9 0 0 1 0 7 5% 6 0% 3 0% 1 0% material 2 67.5 22.5 1 0 7 2% 8 9 % 5% 6% Material 3 4 5 4 5 1 0 7 1% 9 0% 3% 7% Material 4 22.5 67.5 1 0 6 8% 9 2% 1% 7% Material 5 0 9 0 1 0 4 5% 9 0% 0% 10% In Table 1 above, untreated activated carbon, impregnated activated carbon, and photocatalyst of various mixed materials are shown by weight%. The toluene removal rate is obtained by comparing the toluene concentration on the upstream side with the toluene concentration on the downstream side. For example, when the downstream toluene concentration is 0.5 ppm with respect to the upstream toluene concentration of 2 ppm, the toluene removal rate is 75%. In Table 1, the rates of carbon dioxide, aldehydes, and other emissions are expressed in terms of carbon atoms. That is, it shows how the carbon atoms of the removed toluene are distributed to the above three forms downstream of the deodorizing unit 10. Therefore, the occurrence rate may be interpreted as a distribution rate in terms of carbon atoms. More specifically, since toluene is represented by the chemical formula C 7 H 8 and contains 7 carbon atoms, 2 ppm of toluene becomes 14 pp xn in terms of carbon atom concentration. Since carbon dioxide has one carbon atom, for example, if 8.4 ppm of carbon dioxide is measured, the carbon atom equivalent concentration in carbon dioxide is also 8.4 ppm, which is the above carbon atom equivalent concentration of toluene. Dividing by ppm gives a carbon dioxide emission rate of 60%. By the way, formaldehyde is represented by the formula HCHO and contains one carbon atom, so 1 ppm of formaldehyde is 1 ppm in terms of carbon atom concentration. Acetaldehyde is represented by the chemical formula CH 3 CH 0 and contains two carbon atoms, so 1 ppm of acetoaldehyde is 2 ppm in terms of carbon atoms.
上記実験によれば、添着処理活性炭 1 6の未処理活性炭 1 5に対する重量比で、 1Z3〜3倍の範囲では、 トルエンを満足できるレベルまで除去し、 アルデヒド 発生を満足できるレベルまで抑制することができることが判明した。 図 4, 図 5は、 本発明の第 2の実施形態を示す。 この実施形態の脱臭ユニット 1 0 ' は、 第 1実施形態の脱臭ュニット 10の代わりに空調装置に組み込まれる ものであり、 フレーム 1 1 ' には、 上流側から下流側に向かって順に第 1, 第 2 のフィルタ 1 2 A， 1 2 B (第 1, 第 2の担持体） が支持されている。 これらフ イルク 1 2 A, 1 2 B間に上下 2本の紫外線ランプ 13が配置されている。 上流 側の第 1フィルタ 1 2 Aには、未処理活性炭 1 5と光触媒 1 7が担持されている。 下流側の第 2フィルタ 1 2 Bには、 添着活性炭 1 6と光触媒 1 7が配置されてい る。 According to the above experiment, when the weight ratio of the impregnated activated carbon 16 to the untreated activated carbon 15 is 1Z3 to 3 times, toluene can be removed to a satisfactory level and aldehyde generation can be suppressed to a satisfactory level. It turns out that it can be done. FIGS. 4 and 5 show a second embodiment of the present invention. The deodorizing unit 10 ′ of this embodiment is incorporated in an air conditioner instead of the deodorizing unit 10 of the first embodiment, and the frame 11 ′ has the first and the first in order from the upstream side to the downstream side. Second filters 12A and 12B (first and second carriers) are supported. Upper and lower two ultraviolet lamps 13 are arranged between the filters 12A and 12B. An untreated activated carbon 15 and a photocatalyst 17 are supported on the first filter 12A on the upstream side. In the second filter 12 B on the downstream side, an impregnated activated carbon 16 and a photocatalyst 17 are arranged.
上記構成の脱臭ュニット 10' では、 上流側の第 1フィルタ 1 2 Aにおいて、 未処理活性炭 1 5で主にトルエン等の炭化水素を吸着し、 光触媒 1 7でこの炭化 水素を分解する。 アルデヒド等の分解副生成物は第 1フィルタ 1 2 Aではあまり 吸着されないが、 下流側の第 2フィルタ 1 2Bにおいて、 添着活性炭 1 6で吸着 され、光触媒 1 7で分解される。 中間の紫外線ランプ 1 3は、両フィルタ 1 2A， 1 2 Bの光触媒を励起する。  In the deodorizing unit 10 'having the above configuration, the untreated activated carbon 15 adsorbs mainly hydrocarbons such as toluene in the upstream first filter 12A, and the photocatalyst 17 decomposes the hydrocarbons. Decomposition by-products such as aldehydes are not adsorbed so much by the first filter 12A, but are adsorbed by the impregnated activated carbon 16 in the downstream second filter 12B and decomposed by the photocatalyst 17. The intermediate ultraviolet lamp 13 excites the photocatalysts of both filters 12A and 12B.
上述したように、 第 2実施形態では、 2つのフィルタ 1 2A, 1 2 Bで役割を 分担し、 上流側の第 1フィルタ 12 Aでは捕捉しきれない副生成物を下流側の第 2フィルタ 1 2 Bで確実に捕捉し分解することができる。  As described above, in the second embodiment, the roles are shared by the two filters 12A and 12B, and the by-products that cannot be completely captured by the upstream first filter 12A are removed by the downstream second filter 1A. 2 B can be reliably captured and decomposed.
上記第 2実施形態において、 2つのフィルタ 1 2A, 1 2 Bの両方に上記 2種 類の活性炭 1 5， 1 6と光触媒 1 7を担持させるようにしてもよい。 この場合、 第 1フィルタ 1 2Aでは未処理活性炭 1 5を添着活性炭 16より多く担持させ、 第 2フィルタ 1 2Bでは添着活性炭 1 6を未処理活性炭 15より多く担持させる ようにすれば、 第 2実施形態と同等の脱臭効果が得られる。  In the second embodiment, both of the two types of activated carbon 15 and 16 and the photocatalyst 17 may be supported on both of the two filters 12A and 12B. In this case, if the first filter 12A carries more untreated activated carbon 15 than the impregnated activated carbon 16 and the second filter 12B carries more impregnated activated carbon 16 than the untreated activated carbon 15, the second implementation A deodorizing effect equivalent to the form can be obtained.
第 1吸着剤としては、 未処理活性炭の代わりにゼォライト等を用いてもよい。 また、 光触媒としては酸化亜鉛等を用いてもよい。 光源はランプでなく LEDの 形態でもよい。 フィルタはプリ一ッ型でなくハニカム型でもよい。 産業上の利用の可能性  As the first adsorbent, zeolite or the like may be used instead of untreated activated carbon. Further, zinc oxide or the like may be used as the photocatalyst. The light source may be in the form of an LED instead of a lamp. The filter may be a honeycomb type instead of a pre-type. Industrial applicability
本発明は車両用空調装置に限らず、 他の用途に用いてもよい。 例えばエチレン (炭化水素， 有機化合物） を分解するためにも用いることができる。 この場合に も分解副生成物としてアルデヒ ドが生じる。 このようなエチレンを除去する装置 を果物貯蔵室に設ければ、 果物の熟成を遅らせることができる。 また、 家屋にお いて、 住宅建材から出る化学物質を除去する装置に適用してもよい。 The present invention is not limited to the vehicle air conditioner, but may be used for other purposes. For example, it can be used to decompose ethylene (hydrocarbons, organic compounds). In this case Also produces aldehydes as decomposition by-products. If such a device for removing ethylene is provided in the fruit storage room, the ripening of the fruit can be delayed. Also, the present invention may be applied to an apparatus for removing a chemical substance emitted from house building materials in a house.

Claims

請 求 の 範 囲 The scope of the claims
1. 空気中に含まれる除去対象の化学物質を吸着する第 1吸着剤 （1 5) と、 こ の化学物質を分解する光触媒 （1 7) と、 これら第 1吸着剤および光触媒を担持 する担持手段 （1 2 ； 1 2A, 1 2 B) とを備えた化学物質除去装置において、 上記担持手段 （1 2 ； 1 2A, 1 2B) には、 上記化学物質の分解により生じ た副生成物に対する吸着能力が第 1吸着剤より高い第 2吸着剤 （1 6) をも担持 させ、 この第 2吸着剤に吸着した副生成物も上記光触媒 （1 7) で分解させるよ うにしたことを特徴とする化学物質除去装置。 1. A first adsorbent (15) that adsorbs the chemical substance to be removed contained in the air, a photocatalyst (17) that decomposes this chemical substance, and a carrier that carries these first adsorbent and photocatalyst In the chemical substance removing device provided with the means (12; 12A, 12B), the supporting means (12; 12A, 12B) is provided with a device for removing by-products generated by the decomposition of the chemical substance. A second adsorbent (16) having a higher adsorption capacity than the first adsorbent is also supported, and by-products adsorbed on the second adsorbent are also decomposed by the photocatalyst (17). Chemical removal equipment.
2. さらに空気通路 （1 3 a) を備え、 この空気通路に、 上記担持手段 （1 2 ； 1 2A, 1 2B) を配置するとともに、 送風手段 （3) を配置したことを特徴と する請求項 1に記載の化学物質除去装置。  2. A claim characterized by further comprising an air passage (13a), in which the support means (12; 12A, 12B) and the blowing means (3) are arranged in the air passage. Item 2. The chemical substance removing device according to Item 1.
3. 上記担持手段は単一の担持体 （1 2) からなり、 この担持体に、 上記第 1, 第 2の吸着剤 （1 5, 1 6) と光触媒 （1 7) を担持させたことを特徴とする請 求項 2に記載の化学物質除去装置。  3. The supporting means is composed of a single support (1 2), and the first and second adsorbents (15, 16) and the photocatalyst (17) are supported on the support. The chemical substance removing device according to claim 2, wherein the chemical substance removing device is characterized in that:
4. 上記担持手段は、 空気通路 （1 3 a) の上流から下流に向かって順に配置さ れた第 1, 第 2の担持体 （1 2A, 1 2 B) を有し、 第 1担持体 （ 1 2 A) には 上記第 1吸着剤 （1 5) と光触媒 （1 7) を担持させ、 第 2担持体 （1 2 B) に は上記第 2吸着剤 （1 6) と光触媒 （1 7) を担持させたことを特徴とする請求 項 2に記載の化学物質除去装置。  4. The support means has first and second support bodies (12A, 12B) arranged in order from the upstream to the downstream of the air passage (13a). (12A) supports the first adsorbent (15) and the photocatalyst (17), and the second support (12B) supports the second adsorbent (16) and the photocatalyst (1). The chemical substance removing device according to claim 2, wherein 7) is carried.
5. 上記第 1， 第 2担持体 （1 2A, 1 2 B) 間に光触媒 （1 7) を励起するた めの光源 （1 3) を配置したことを特徴とする請求項 4に記載の化学物質除去装  5. The method according to claim 4, wherein a light source (13) for exciting the photocatalyst (17) is arranged between the first and second supports (12A, 12B). Chemical removal equipment
6. 上記担持手段は、 空気通路 （1 3 a) の上流から下流に向かって順に配置さ れた第 1, 第 2の担持体 （1 2A， 1 2 B) を有し、 各担持体には上記第 1， 第 2吸着剤 （1 5, 1 6) と光触媒 （1 7) を担持させ、 第 1担持体 （1 2A) で は第 1吸着剤 （1 5) を第 2吸着剤 （1 6) より多く担持させ、 第 2担持体 （1 2 B ) では上記第 2吸着剤を第 1吸着剤より多く担持させたことを特徴とする請 求項 2に記載の化学物質除去装置。 6. The carrying means has first and second carrying bodies (12A, 12B) arranged in order from upstream to downstream of the air passage (13a). Carries the first and second adsorbents (15, 16) and the photocatalyst (17), and the first carrier (12A) replaces the first adsorbent (15) with the second adsorbent (15). 16) The chemical substance removing apparatus according to claim 2, wherein the second adsorbent is loaded more than the first adsorbent in the second support (12B).
7. 上記第 1, 第 2担持体 （1 2A, 1 2B) 間に光触媒 （1 7) を励起するた めの光源 （1 3) を配置したことを特徴とする請求項 6に記載の化学物質除去装 置。 7. The chemical according to claim 6, characterized in that a light source (13) for exciting a photocatalyst (17) is arranged between the first and second supports (12A, 12B). Material removal equipment.
8. 上記第 1吸着剤 （1 5) 1S 除去対象の化学物質としての有機化合物に対す る吸着効率の高い未処理活性炭であり、 上記第 2吸着剤 （16) ヽ 副生成物と してのアルデヒドに対する吸着効率の高い添着活性炭であることを特徴とする請 求項 1に記載の化学物質除去装置。  8. Above first adsorbent (15) Untreated activated carbon with high adsorption efficiency for organic compounds as chemical substances to be removed from 1S, and second adsorbent (16) ヽ as a by-product 3. The chemical substance removing device according to claim 1, wherein the activated carbon is an impregnated activated carbon having a high adsorption efficiency for aldehyde.
PCT/JP2001/001177 2000-02-22 2001-02-19 Apparatus for removing chemical substance WO2001062307A1 (en)

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