JP2002085536A - Deodorization filter - Google Patents
Deodorization filterInfo
- Publication number
- JP2002085536A JP2002085536A JP2000284675A JP2000284675A JP2002085536A JP 2002085536 A JP2002085536 A JP 2002085536A JP 2000284675 A JP2000284675 A JP 2000284675A JP 2000284675 A JP2000284675 A JP 2000284675A JP 2002085536 A JP2002085536 A JP 2002085536A
- Authority
- JP
- Japan
- Prior art keywords
- deodorizing filter
- activated carbon
- filter according
- diameter
- deodorization
- 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.)
- Pending
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、家庭用の空気清浄
機、脱臭器、その他の空気調和機に使用される脱臭フィ
ルタの構成および構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a configuration and a structure of a deodorizing filter used for a home air purifier, a deodorizer, and other air conditioners.
【０００２】[0002]
【従来の技術】従来、例えば、図４に示すように、吸込
口１と吹出口２とを結ぶ通風路３に配置され、送風ファ
ン４により通風される空気の脱臭を行う脱臭フィルタ４
は、直径３ｍｍ、長さ５ｍｍ程度の造粒炭或いは、一辺
が５ｍｍ程度の破砕炭をネット或いは、紙で仕切られた
容器の中に入れただけのものが使用されるのが一般的で
ある。直径０．２ｍｍ程度の活性炭をシートに固定した
ものもあるが、単一の粒径を使用していた。ところで、
活性炭の能力は、ワンパスで除去するための速度と、飽
和するまでの持続力の２つが考えられ、共に、活性炭の
全表面積に対応して決まるものである。しかし、前者
（速度）に関しては、粒の表面積、つまり、マクロの表
面積が、持続力に関しては粒の中の細孔の表面積つま
り、ミクロの表面積が大きく寄与している。これは、通
風に際して空気が接触するのは活性炭の粒の表面であ
り、表面で捕捉されたガス分子が細孔の奥の方へ徐々に
移動、固定されていくからである。マクロの表面積は、
粒が小さい程、単位重量当り大きくなる。ミクロの表面
積は一般に1000〜1500m2/gで、重量に比例する。通風抵
抗を勘案すると、大粒のものを並べると、小さい抵抗
で、大きな重量即ち、大きなミクロ表面積、持続力が得
られることになる。活性炭の製造の観点からも、ペレッ
ト状の大粒のものが容易であった。しかし、直径３ｍ
ｍ、長さ５ｍｍの造粒炭の単位体積当りのマクロ表面積
が、1.73mm2/mm3 なのに対して、直径０．２ｍｍの球状
体では、30mm2/mm3 と略１７倍になり、この差が脱臭速
度の差となってくる。一方、直径０．２ｍｍの粒状炭は
固定の方法が難しく、バインダを用いて紙等に１〜２層
の薄い層で担持させるのみである。当然、粗いメッシュ
では飛散を防止できないため、完全に固定しなければな
らない。また、層を厚くするために、バインダを増やす
と、活性炭の表面が覆われてしまい、本来の機能が発揮
されなくなる。そのために、速度はあるものの、持続力
に乏しい脱臭フィルタとなる。また、活性炭の総量を増
やすために、シートにプリーツ加工を施すことがある
が、粒径が大きいと、シートが厚くなり、折りづらく、
また、構造圧損が増えることもあり、粒径の大きいもの
での同様の加工による接続力アップは困難である。活性
炭で吸着しづらいガスに対して、薬品を添着することが
よくあるが、酸性ガス、アルカリ性ガスのそれぞれの中
和材は、互いに反応し易いので、別々に処理する必要が
ある。また、別々に添着した活性炭も、混ぜ合わせる
と、効果が薄れる場合がある。タバコの主成分の一つで
ある酢酸や、体臭の構成する脂肪酸等は薬品の添着によ
る処理は向かず、非添着部分の細孔による物理吸着が行
われる。但し、物理吸着は化学吸着に比べて速度が遅
く、タバコなど、複数の成分ガスの処理に際しては、全
成分を一様に処理することが難しかった。即ち、アンモ
ニア等は薬品の添着量を増やすことで対応できるが、酢
酸等は非添着でマクロの表面積を増やす必要がある。空
気清浄機に脱臭フィルタをセットする場合、大きな造粒
炭からなるワンパスの効率の低いものは、空気の漏れの
影響も小さいが、ネットや袋詰めのフィルタは取扱いに
あたり、折れ、曲り、ずれ等の問題が発生し易い。2. Description of the Related Art Conventionally, as shown in FIG. 4, for example, a deodorizing filter 4 which is disposed in a ventilation path 3 connecting an inlet 1 and an outlet 2 and deodorizes air passed by a blower fan 4 is provided.
In general, granulated coal having a diameter of about 3 mm and a length of about 5 mm, or crushed coal having a side of about 5 mm is simply placed in a net or a container partitioned by paper, and used. . Some sheets have activated carbon having a diameter of about 0.2 mm fixed to a sheet, but a single particle size is used. by the way,
The capacity of activated carbon can be considered as two factors, the speed for removing in one pass and the sustaining force until saturation, and both are determined according to the total surface area of the activated carbon. However, regarding the former (velocity), the surface area of the grains, that is, the macro surface area, largely contributes to the sustaining force, and the surface area of the pores within the grains, that is, the micro surface area, largely contributes. This is because air comes into contact with the surface of the activated carbon particles during ventilation, and the gas molecules trapped on the surface gradually move toward the depth of the pores and are fixed. The surface area of the macro is
The smaller the grain, the larger per unit weight. The surface area of the micros is generally between 1000 and 1500 m 2 / g and is proportional to the weight. In consideration of the ventilation resistance, when large grains are arranged, a large weight, that is, a large micro surface area and sustainability can be obtained with a small resistance. From the viewpoint of the production of activated carbon, large pellets were easy. However, 3m in diameter
The macroscopic surface area per unit volume of granulated coal having a length of 5 mm and a length of 5 mm is 1.73 mm 2 / mm 3 , whereas a spherical body having a diameter of 0.2 mm is approximately 17 times as large as 30 mm 2 / mm 3. The difference is the difference in the deodorization speed. On the other hand, granular coal having a diameter of 0.2 mm is difficult to fix, and it is only supported on paper or the like in one or two thin layers using a binder. Naturally, a coarse mesh cannot prevent scattering, and must be completely fixed. Further, when the binder is increased to increase the thickness of the layer, the surface of the activated carbon is covered and the original function is not exhibited. This results in a deodorizing filter that is fast but poorly sustained. Also, in order to increase the total amount of activated carbon, the sheet may be pleated, but if the particle size is large, the sheet becomes thicker and harder to fold,
In addition, structural pressure loss may increase, and it is difficult to increase the connection force by the same processing with a material having a large particle size. Chemicals are often impregnated with a gas that is difficult to adsorb with activated carbon, but the neutralizing materials of the acidic gas and the alkaline gas are liable to react with each other, so they need to be treated separately. In addition, when activated carbon separately impregnated is mixed, the effect may be reduced. Acetic acid, which is one of the main components of tobacco, and fatty acids that constitute a body odor do not undergo treatment by the attachment of chemicals, but are physically adsorbed by the pores of the non-attached portion. However, physical adsorption is slower than chemical adsorption, and it is difficult to uniformly treat all components when treating a plurality of component gases such as tobacco. That is, ammonia and the like can be dealt with by increasing the amount of chemicals adhering, but acetic acid and the like need to increase the surface area of the macro without adhering. When a deodorizing filter is set in an air purifier, a one-pass low-efficiency filter made of large granulated coal is less affected by air leakage, but a net or bag-packed filter is broken, bent, misaligned, etc. Problem easily occurs.
【０００３】[0003]
【発明が解決しようとする課題】本発明は以上述べた問
題点を解決し、脱臭能力を向上した脱臭フィルタを提供
することを目的としている。SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to provide a deodorizing filter having an improved deodorizing ability.
【０００４】[0004]
【課題を解決するための手段】本発明は上述の課題を解
決するため、吸込口と吹出口とを結ぶ通風路に配置さ
れ、送風ファンにより通風される空気の脱臭を行う脱臭
フィルタであって、粒径の異なる活性炭を通風方向の前
後に配置することにより、脱臭速度を速くすると共に、
持続力をも兼ね備えるようにした脱臭フィルタとしてい
る。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is a deodorizing filter which is disposed in an air passage connecting an inlet and an outlet and deodorizes air passed by a blower fan. By arranging activated carbon with different particle sizes before and after in the ventilation direction, the deodorizing speed is increased,
It is a deodorizing filter that also has lasting power.
【０００５】前記活性炭が直径１ｍｍのものと、０．２
ｍｍのものとの２種類を組合せて配置されてなる脱臭フ
ィルタとしている。[0005] The activated carbon has a diameter of 1 mm,
The filter is a deodorizing filter that is arranged by combining two types of filters having a diameter of 2 mm and 2 mm.
【０００６】前記粒径の異なる活性炭のうち、少なくと
も一方に、化学添着を施した脱臭フィルタとしている。[0006] A deodorizing filter in which at least one of the activated carbon particles having different particle diameters is chemically impregnated is used.
【０００７】前記粒径の異なる活性炭をそれぞれ担持さ
せてシートに加工してなる脱臭フィルタとしている。[0007] A deodorizing filter is formed by carrying activated carbon having different particle diameters and processing them into sheets.
【０００８】活性炭を担持させて形成された前記シート
のうち、少なくとも１種類のシートにプリーツ加工を施
してなる脱臭フィルタとしている。[0008] A deodorizing filter is formed by pleating at least one of the sheets formed by carrying activated carbon.
【０００９】前記シートが不織布の間に活性炭を挟み込
むことにより、活性炭を担持させてなる脱臭フィルタと
している。The sheet has a deodorizing filter in which activated carbon is carried by sandwiching activated carbon between nonwoven fabrics.
【００１０】前記不織布に帯電加工を施してなる脱臭フ
ィルタとしている。The deodorizing filter is obtained by subjecting the nonwoven fabric to a charging process.
【００１１】前記活性炭または前記活性炭を担持させた
シートを剛性のある枠で囲むことにより装置への装着を
容易にすると共に、空気漏れを防ぐようにした脱臭フィ
ルタとしている。The activated carbon or the sheet carrying the activated carbon is surrounded by a rigid frame, so that the filter can be easily mounted on the apparatus and the deodorizing filter is designed to prevent air leakage.
【００１２】前記粒径の異なる活性炭のうち、小さい粒
径のものに化学添着を施さないようにした脱臭フィルタ
としている。[0012] Among the activated carbons having different particle diameters, those having a small particle diameter are not subjected to chemical impregnation.
【００１３】前記添着する化学薬品を粒径によって異な
る種類とした脱臭フィルタとしている。[0013] A deodorizing filter in which the chemicals to be impregnated are different depending on the particle diameter is provided.
【００１４】[0014]
【発明の実施の形態】以下、図面に基づいて本発明によ
る脱臭フィルタを詳細に説明する。図１は本発明による
脱臭フィルタの一実施例を装着した空気清浄機の要部断
面図、図２は本発明による脱臭フィルタの一実施例を示
す断面図である。図１に示すように、吸込口１と吹出口
２とを結ぶ通風路３に、粒径の異なる２種類の活性炭を
通風方向の前後に配置して２層に形成してなる脱臭フィ
ルタ４と、送風ファン５とを配設している。また、前記
通風路３以外の位置に、前面に操作スイッチを設けた制
御部９を配設し、操作スイッチを操作することにより、
前記送風ファン５の回転を制御するようにしている。そ
して、前記送風ファン５により吸込口１から吸い込ま
れ、通風路３に通風される室内の臭気を含んだ空気か
ら、２層に形成された前記脱臭フィルタ４により臭いの
成分を急速且つ持続して捕捉して臭気濃度を下げ、吹出
口２から吹出すようにしている。室内の臭気濃度が高い
場合は、これを繰り返すことにより、臭気濃度をより下
げることができる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a deodorizing filter according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a sectional view of a main part of an air purifier equipped with an embodiment of a deodorizing filter according to the present invention, and FIG. 2 is a sectional view showing an embodiment of a deodorizing filter according to the present invention. As shown in FIG. 1, a deodorizing filter 4 formed in two layers by arranging two types of activated carbon having different particle sizes before and after in a ventilation direction in an air passage 3 connecting an inlet 1 and an outlet 2. , A blower fan 5. Further, a control unit 9 provided with an operation switch on the front surface is provided at a position other than the ventilation path 3 and the operation switch is operated, so that
The rotation of the blower fan 5 is controlled. Then, from the air containing odor in the room, which is sucked in from the suction port 1 by the blower fan 5 and passed through the ventilation passage 3, the odor component is rapidly and continuously maintained by the deodorizing filter 4 formed in two layers. The odor concentration is trapped and the odor concentration is lowered, and the odor is blown out from the outlet 2. When the indoor odor concentration is high, the odor concentration can be further reduced by repeating this.
【００１５】前記脱臭フィルタ４は、例えば、図２に示
すように、直径略１ｍｍの活性炭６ａと、直径略０．２
ｍｍの活性炭６ｂとを、それぞれ不織布７の間に挟んで
担持させてシート４ａおよび、シート４ｂを作り、この
シート４ａおよび、シート４ｂを直列に配置して形成す
るようにしている。As shown in FIG. 2, for example, the deodorizing filter 4 comprises an activated carbon 6a having a diameter of about 1 mm and an activated carbon 6a having a diameter of about 0.2 mm.
Activated carbon 6b is sandwiched between the nonwoven fabrics 7 to be supported, thereby forming a sheet 4a and a sheet 4b, and the sheet 4a and the sheet 4b are arranged and formed in series.
【００１６】図３は本発明による脱臭フィルタの他の実
施例を示す断面図である。本実施例においては、前記直
径略１ｍｍの活性炭６ａを担持させたシート４ａと、直
径略０．２ｍｍの活性炭６ｂを担持させたシート４ｂと
にプリーツ加工を施して面積を増やし、さらに、不織布
に帯電不織布７ａを使用して臭気のみならず塵埃をも除
去でき、集塵効率を７０％以上とすることができる。ま
た、前記各シート４ａ、４ｂを前記通風路３に対応した
枠８で囲むことにより通風する全ての空気が脱臭フィル
タ４を通過するようにして脱臭効率を上げている。ま
た、前記シート４ｂに担持させる直径略０．２ｍｍの活
性炭６ｂに化学薬品を添着せず、前記シート４ａに担持
させる直径略１ｍｍの活性炭６ａに化学薬品を添着し、
物理吸着と化学吸着を併用することによりタバコの煙等
のように、複数の成分ガスの処理を容易としている。FIG. 3 is a sectional view showing another embodiment of the deodorizing filter according to the present invention. In the present embodiment, the sheet 4a carrying the activated carbon 6a having a diameter of about 1 mm and the sheet 4b carrying the activated carbon 6b having a diameter of about 0.2 mm are pleated to increase the area. Using the charged nonwoven fabric 7a, not only odor but also dust can be removed, and the dust collection efficiency can be 70% or more. Further, by enclosing each of the sheets 4a and 4b with a frame 8 corresponding to the ventilation path 3, all the air passing therethrough passes through the deodorizing filter 4, thereby increasing the deodorizing efficiency. Further, the chemical is not attached to the activated carbon 6b having a diameter of about 0.2 mm carried on the sheet 4b, and the chemical is attached to the activated carbon 6a having a diameter of about 1mm carried on the sheet 4a.
The combined use of physical adsorption and chemical adsorption facilitates the treatment of multiple component gases, such as cigarette smoke.
【００１７】上記実施例では、前記直径略０．２ｍｍの
活性炭６ｂには化学薬品を添着しなかったが、前記直径
略１ｍｍの活性炭６ａに添着した化学薬品とは別の種類
の化学薬品を添着してもよい。例えば、直径略０．２ｍ
ｍの活性炭６ｂには酸性ガスを中和する化学薬品、直径
略１ｍｍの活性炭６ａにはアルカリ性ガスを中和する化
学薬品を添着することにより、薬品同士の反応を避け、
異なる種類の臭気成分の吸着を促進して脱臭効率を上げ
ることができる。In the above embodiment, no chemical was attached to the activated carbon 6b having a diameter of about 0.2 mm, but a different type of chemical was attached to the activated carbon 6a having a diameter of about 1 mm. May be. For example, approximately 0.2m in diameter
By adhering a chemical that neutralizes acidic gas to the activated carbon 6b of m and a chemical that neutralizes alkaline gas to the activated carbon 6a having a diameter of about 1 mm, a reaction between the chemicals is avoided.
Adsorption of different types of odor components can be promoted to increase deodorization efficiency.
【００１８】[0018]
【発明の効果】以上説明したように、本発明による脱臭
フィルタによれば、吸込口と吹出口とを結ぶ通風路に配
置され、送風ファンにより通風される空気の脱臭を行う
脱臭フィルタであって、粒径の異なる活性炭を通風方向
の前後に配置することにより、脱臭速度を速くすると共
に、持続力をも兼ね備えるようにした脱臭フィルタを提
供することができる。また、粒径の異なる活性炭をそれ
ぞれシートに担持させ、さらにプリ−ツ加工することに
より、集塵効率を上げ、さらに、一方のシートに帯電不
織布を使用することにより、塵埃も除去でき、また、化
学薬品の活性炭への添着により、異なる種類の臭気成分
の吸着を促進して脱臭効率を上げることができる。As described above, according to the deodorizing filter of the present invention, the deodorizing filter is disposed in the ventilation path connecting the suction port and the air outlet, and deodorizes the air passed by the blowing fan. By arranging activated carbon having different particle diameters before and after in the ventilation direction, it is possible to provide a deodorizing filter which has a high deodorizing speed and also has a sustaining power. In addition, activated carbon having different particle diameters is supported on each sheet, and further pleating is performed to increase dust collection efficiency. Further, by using a charged nonwoven fabric for one sheet, dust can also be removed. By impregnating the activated carbon with the chemicals, the adsorption of different types of odor components can be promoted to increase the deodorizing efficiency.
【図１】本発明による脱臭フィルタの一実施例を装着し
た空気清浄機の要部断面図である。FIG. 1 is a sectional view of a main part of an air purifier equipped with an embodiment of a deodorizing filter according to the present invention.
【図２】本発明による脱臭フィルタの一実施例を示す断
面図である。FIG. 2 is a sectional view showing one embodiment of a deodorizing filter according to the present invention.
【図３】本発明による脱臭フィルタの他の実施例を示す
断面図である。FIG. 3 is a sectional view showing another embodiment of the deodorizing filter according to the present invention.
【図４】従来の脱臭フィルタを装着した空気清浄機の要
部断面図である。FIG. 4 is a sectional view of a main part of an air purifier equipped with a conventional deodorizing filter.
１ 吸込口 ２ 吹出口 ３ 通風路 ４ 脱臭フィルタ ４ａ、４ｂ シート ５ 送風ファン ６ａ 直径略１ｍｍの活性炭 ６ｂ 直径略０．２ｍｍの活性炭 ７ 不織布 ７ａ 帯電不織布 ８ 枠 REFERENCE SIGNS LIST 1 suction port 2 outlet 3 ventilation path 4 deodorizing filter 4 a, 4 b sheet 5 blower fan 6 a activated carbon having a diameter of approximately 1 mm 6 b activated carbon having a diameter of approximately 0.2 mm 7 nonwoven fabric 7 a charged nonwoven fabric 8 frame
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｂ０１Ｊ 20/20 Ｂ０１Ｊ 20/20 Ａ Ｃ ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification code FI Theme coat ゛ (Reference) B01J 20/20 B01J 20/20 AC
Claims (10)
れ、送風ファンにより通風される空気の脱臭を行う脱臭
フィルタであって、粒径の異なる活性炭を前後に配置し
たことを特徴とする脱臭フィルタ。1. A deodorizing filter which is disposed in a ventilation path connecting an inlet and an outlet and deodorizes air passed by a blower fan, wherein activated carbons having different particle diameters are disposed before and after. Deodorizing filter.
径略０．２ｍｍのものとの２種類を組合せて配置されて
なることを特徴とする請求項１記載の脱臭フィルタ。2. The deodorizing filter according to claim 1, wherein the activated carbon is a combination of two types, one having a diameter of about 1 mm and the other having a diameter of about 0.2 mm.
とも一方に、化学薬品を添着したことを特徴とする請求
項１または請求項２記載の脱臭フィルタ。3. The deodorizing filter according to claim 1, wherein a chemical agent is attached to at least one of the activated carbons having different particle diameters.
させてシートに加工してなることを特徴とする請求項２
または請求項３記載の脱臭フィルタ。4. The method according to claim 2, wherein the activated carbons having different particle diameters are respectively supported and processed into sheets.
Or the deodorizing filter according to claim 3.
トのうち、少なくとも１種類のシートにプリーツ加工を
施してなることを特徴とする請求項４記載の脱臭フィル
タ。5. The deodorizing filter according to claim 4, wherein at least one of the sheets formed by carrying activated carbon is pleated.
込むことにより、活性炭を担持させてなることを特徴と
する請求項４または請求項５記載の脱臭フィルタ。6. The deodorizing filter according to claim 4, wherein the sheet holds activated carbon by sandwiching activated carbon between nonwoven fabrics.
を特徴とする請求項６記載の脱臭フィルタ。7. The deodorizing filter according to claim 6, wherein the nonwoven fabric is subjected to a charging process.
たシートを剛性のある枠で囲むことにより装置への装着
を容易にすると共に、空気漏れを防ぐようにしたことを
特徴とする請求項１乃至請求項７の何れかに記載の脱臭
フィルタ。8. The apparatus according to claim 1, wherein the activated carbon or the sheet carrying the activated carbon is surrounded by a rigid frame to facilitate mounting on the apparatus and prevent air leakage. The deodorizing filter according to claim 7.
粒径のものに化学薬品を添着するようにしたことを特徴
とする請求項３記載の脱臭フィルタ。9. The deodorizing filter according to claim 3, wherein a chemical agent is attached to the activated carbon having a large particle diameter among the activated carbon particles having different particle diameters.
異なる種類としたことを特徴とする請求項３記載の脱臭
フィルタ。10. The deodorizing filter according to claim 3, wherein the chemicals to be attached are of different types depending on the particle size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000284675A JP2002085536A (en) | 2000-09-20 | 2000-09-20 | Deodorization filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000284675A JP2002085536A (en) | 2000-09-20 | 2000-09-20 | Deodorization filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002085536A true JP2002085536A (en) | 2002-03-26 |
Family
ID=18768852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000284675A Pending JP2002085536A (en) | 2000-09-20 | 2000-09-20 | Deodorization filter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002085536A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2003320209A (en) * | 2002-05-01 | 2003-11-11 | Mahle Tennex Corp | Deodorizing filter medium and deodorizing filter |
| KR20040010004A (en) * | 2002-08-29 | 2004-01-31 | 주식회사 크린세븐 | An ornament for indoors |
| WO2015173949A1 (en) * | 2014-05-16 | 2015-11-19 | 栗田工業株式会社 | Activated carbon cartridge, gas purification device, and air purification method |
| WO2018165800A1 (en) * | 2017-03-12 | 2018-09-20 | 深圳市上羽科技有限公司 | Central four-constant treatment air conditioner specifically used in smart home |
| JP2018201721A (en) * | 2017-05-31 | 2018-12-27 | 住江織物株式会社 | Deodorant filter, and air cleaning machine with the deodorant filter |
| JPWO2019189638A1 (en) * | 2018-03-30 | 2021-02-12 | 東レ株式会社 | Multi-layer filter medium |
| CN114001412A (en) * | 2021-11-26 | 2022-02-01 | 安徽南国机电科技发展有限公司 | Deodorizing device installed at fresh air conditioner air outlet and installation method thereof |
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