KR100816509B1 - Disc type filter - Google Patents

Disc type filter Download PDF

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Publication number
KR100816509B1
KR100816509B1 KR1020070049367A KR20070049367A KR100816509B1 KR 100816509 B1 KR100816509 B1 KR 100816509B1 KR 1020070049367 A KR1020070049367 A KR 1020070049367A KR 20070049367 A KR20070049367 A KR 20070049367A KR 100816509 B1 KR100816509 B1 KR 100816509B1
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South Korea
Prior art keywords
adsorbent
filter
disk
disc
duct
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KR1020070049367A
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Korean (ko)
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박재홍
변정훈
윤기영
황정호
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연세대학교 산학협력단
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/39—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with hollow discs side by side on, or around, one or more tubes, e.g. of the leaf type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
    • B01D39/2055—Carbonaceous material
    • B01D39/2058—Carbonaceous material the material being particulate
    • B01D39/2062—Bonded, e.g. activated carbon blocks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
    • B01D39/2068—Other inorganic materials, e.g. ceramics

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Separation Of Gases By Adsorption (AREA)
  • Treating Waste Gases (AREA)

Abstract

A disc type filter is provided to operate the filter efficiently by performing adsorption and desorption of an adsorbent at the same time, enable the filter to be used for a long time without straining the filter, and separate volatile organic compounds for a long time. A disc type filter comprises: a disc filter member(10) including a disc type case(11) having an internal space, a disc(13) which is rotatably installed in the internal space of the case, and which has even number of inserting parts(13a) formed along the edge thereof such that the inserting parts are spaced from one another in a predetermined distance, and an adsorbent(15) mounted on the inserting parts respectively; a plurality of duct members(20) which are penetrated into the case to pass through the adsorbent, and through which air flows; a heater member(30) which is installed within some of the plurality of duct members to heat air just before the air passes through the adsorbent; a drive unit for rotating the disc; and a control part for controlling operation of the drive unit. The adsorbent is carbon, activated carbon, fibrous activated carbon, or zeolite.

Description

디스크형 필터{Disc type filter}Disc type filter

도 1은 본 발명의 바람직한 실시예에 따른 디스크형 필터를 도시한 개념도.1 is a conceptual diagram illustrating a disc filter according to a preferred embodiment of the present invention.

도 2는 본 발명의 제1실시예에 따른 디스크형 필터를 도시한 사시도.2 is a perspective view showing a disc filter according to a first embodiment of the present invention.

도 3은 본 발명의 제2실시예에 따른 디스크형 필터를 도시한 사시도.3 is a perspective view showing a disc filter according to a second embodiment of the present invention;

<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>

10 : 디스크 필터부재 11 : 케이스10 disc filter member 11 case

13 : 디스크 13a : 삽입부13: disc 13a: insert

15 : 흡착제 20 : 덕트부재 15: adsorbent 20: duct member

21 : 제1덕트부재 22 : 제2덕트부재21: first duct member 22: second duct member

23 : 제3덕트부재 24 : 제4덕트부재23: third duct member 24: fourth duct member

30 : 히터부재30: heater member

본 발명은 디스크형 필터에 관한 것이다.The present invention relates to a disc filter.

현대인들은 냉방 및 난방, 방음 등의 고효율화와 에너지 절약이라는 차원에서 외부 공기와 더욱 더 차단된 밀폐도가 증가된 실내에서 생활하는 시간이 늘어남 에 따라 내부 생활환경과 밀접한 관련이 있는 각종 오염물질에 노출되고 있으며, 이러한 이유로 인하여 두통, 안질, 집중력 저하, 어지러움, 매스꺼음 등과 같은 내부공기 오염에 의한 증상을 호소하고 있다. 또한, 에너지 보존을 위한 새로운 건축자재의 등장으로 오염물질, 즉 포름알데히드 및 악취의 방출이 더욱 증가하는 추세이다.Modern people are exposed to various pollutants that are closely related to the internal living environment as they spend more time indoors with increased airtightness, which is more isolated from outside air, in order to improve efficiency and energy saving such as cooling, heating, and soundproofing. For this reason, symptoms are caused by internal air pollution such as headache, eyeball, concentration, dizziness, and nausea. In addition, the emergence of new building materials for energy conservation is increasing the release of pollutants, namely formaldehyde and odor.

따라서 오염된 실내공기는 오염된 대기와 함께 인체에 치명적인 해를 입히기 때문에 실내공간에서 활동함에 따라 자연 배출되는 공기 중의 각종 오염물질을 인체에 해가 없이 안전하게 제거할 수 있는 공기정화용 필터의 사용이 증대되고 있는 실정이다.Therefore, the polluted indoor air causes fatal harm to the human body along with the polluted air. Therefore, the use of the air purification filter that can safely remove various pollutants in the naturally discharged air without harm to the human body as the indoor space is active. It's happening.

그러나 종래 기술에 따른 공기정화용 필터는 내부의 흡착제를 일정 시간이 지나면 교체해주어야 하는 번거로움이 있고, 흡착제의 교체에 따른 비용증가로 인해 비경제적이고 비효율적이다.However, the air purifying filter according to the prior art has a hassle that needs to be replaced after a certain time, the internal adsorbent is inconvenient and inefficient due to the increased cost of the replacement of the adsorbent.

본 발명은 전술한 문제점을 해결하기 위하여 안출된 것으로, 흡착제의 흡착과 탈착이 동시에 이루어질 수 있어 효율적이고, 장기간 사용하여도 무리가 없으며, 장시간 VOC의 분리가 가능한 디스크형 필터를 제공하는 데 그 목적이 있다.The present invention has been made in order to solve the above-mentioned problems, the adsorption and desorption of the adsorbent can be made at the same time efficient, can be used for a long time, and to provide a disk-type filter capable of separating the VOC for a long time There is this.

전술한 목적을 달성하기 위한 본 발명의 디스크형 필터는, 내부공간을 가지는 원판형태의 케이스, 상기 케이스의 내부공간 내에 회전가능하게 마련되고, 가장자리를 따라 일정한 간격을 두고 짝수개의 삽입부가 형성되어 있는 디스크와, 상기 삽입부에 각각 장착되는 흡착제를 포함하는 디스크 필터부재; 상기 케이스를 관통하여 상기 흡착제를 각각 통과하고, 내부에 공기가 흐르도록 마련된 다수의 덕트부재; 상기 다수의 덕트부재 중 일부 덕트부재의 내부에 마련되어 상기 흡착제를 통과하기 직전의 공기를 가열시키는 히터부재; 상기 디스크를 회전시키는 구동수단; 및 상기 구동수단의 작동을 제어하는 제어부;를 포함한다.Disc-shaped filter of the present invention for achieving the above object, the disk-shaped case having an inner space, rotatably provided in the inner space of the case, the even number of inserts are formed at regular intervals along the edge is formed A disk filter member including a disk and an adsorbent respectively mounted to the insertion part; A plurality of duct members penetrating through the case and passing through the adsorbents, respectively, to allow air to flow therein; A heater member provided inside the duct member of the plurality of duct members to heat air immediately before passing through the adsorbent; Drive means for rotating the disk; And a control unit for controlling the operation of the driving means.

상기에 있어서, 상기 흡착제는 탄소, 활성탄, 섬유상활성탄, 제올라이트 중 어느 하나인 것이 바람직하다.In the above, the adsorbent is preferably any one of carbon, activated carbon, fibrous activated carbon, and zeolite.

이하, 본 발명의 바람직한 일실시예를 첨부도면을 참조하여 상세히 설명하면 다음과 같다.Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명의 바람직한 실시예에 따른 디스크형 필터를 도시한 개념도이고, 도 2는 본 발명의 제1실시예에 따른 디스크형 필터를 도시한 사시도이다.1 is a conceptual diagram illustrating a disc filter according to a preferred embodiment of the present invention, Figure 2 is a perspective view showing a disc filter according to a first embodiment of the present invention.

도 1에 도시한 바와 같이, 본 실시예의 디스크형 필터는 디스크형 필터는 디스크 필터부재(10)와 덕트부재(20)와 히터부재(30)와 구동수단(미도시)과 제어부(미도시)를 포함한다.As shown in FIG. 1, the disc filter of the present embodiment includes a disc filter including a disc filter member 10, a duct member 20, a heater member 30, a driving means (not shown), and a controller (not shown). It includes.

디스크 필터부재(10)는 케이스(11)와 디스크(13)와 흡착제(15)를 포함한다.The disc filter member 10 includes a case 11, a disc 13, and an adsorbent 15.

케이스(11)는 내부공간을 가지며, 원판형태이다.The case 11 has an inner space and has a disc shape.

디스크(13)는 케이스(11)의 내부공간 내에 회전가능하게 마련되고, 가장자리를 따라 일정한 간격을 두고 짝수개의 삽입부(13a)가 형성되어 있다.The disk 13 is rotatably provided in the inner space of the case 11, and an even number of insertion portions 13a are formed at regular intervals along the edge.

본 실시예에서는 삽입부(13a)가 네 개로 구성되어 있지만, 실시예에 따라 두 개, 여섯 개, 여덟 개 등 짝수개로 구성될 수 있다. 또한, 본 실시예에서 디스 크(13)는 한 개로 구성되어 있지만, 실시예에 따라서 디스크는 다수 개로 구성될 수 있음은 물론이다.In the present embodiment, four insertion portions 13a are configured, but according to the exemplary embodiment, two, six, eight, and even numbers may be provided. In addition, although the disk 13 is configured in one embodiment in this embodiment, it is a matter of course that a plurality of disks may be configured according to the embodiment.

흡착제(15)는 삽입부(13a)에 각각 장착된다. 본 실시예에서는 삽입부(13a)가 네 개이므로 흡착제(15)는 네 개의 삽입부(13a)에 각각 장착되며, 삽입부(13a)의 개수에 따라 흡착제(15)의 개수도 달라질 수 있다.The adsorbent 15 is attached to the insertion part 13a, respectively. In the present embodiment, since the insert 13a is four, the adsorbents 15 are respectively mounted on the four inserts 13a, and the number of the adsorbents 15 may also vary according to the number of the inserts 13a.

이러한 흡착제(15)는 휘발성유기화합물(Volatile Organic Compounds, 이하 VOC)를 잘 흡착하는 탄소, 활성탄, 섬유상활성탄(Activated cabon fiber), 제올라이트(Zeolite) 중 어느 하나인 것이 바람직하다.The adsorbent 15 is preferably any one of carbon, activated carbon, activated cabon fiber, and zeolite that adsorb volatile organic compounds (VOC).

다수의 덕트부재(20)는 케이스(11)를 관통하여 흡착제(15)를 각각 통과하고, 내부에 공기가 흐르도록 마련되어 있다. The plurality of duct members 20 pass through the case 11 and pass through the adsorbent 15, respectively, and are provided to allow air to flow therein.

본 실시예에서는 삽입부(13a)와 흡착제(15)가 네 개로 구성되어 있음에 따라 덕트부재(20)도 각각의 흡착제(15)를 통과하도록 네 개로 마련되어 있으며, 덕트부재(20)의 개수는 삽입부(13a) 및 흡착제(15)의 개수에 따라 달라질 수 있음은 물론이다.In this embodiment, since the insert 13a and the adsorbent 15 are composed of four, four duct members 20 are also provided to pass through the respective adsorbents 15, and the number of the duct members 20 is Of course, it may vary depending on the number of the insert 13a and the adsorbent 15.

본 명세서의 도 2에서 덕트부재(20)는 상측의 덕트부재(21)를 기준으로 하여 시계방향으로 차례로 제1덕트부재(21), 제2덕트부재(22), 제3덕트부재(23), 제4덕트부재(미도시)라고 하기로 한다. In FIG. 2 of the present specification, the duct member 20 sequentially rotates the first duct member 21, the second duct member 22, and the third duct member 23 in a clockwise direction based on the upper duct member 21. It will be referred to as a fourth duct member (not shown).

또한, 제1덕트부재(21)와 제3덕트부재(23)는 서로 연결되어 있고, 제2덕트부재(22)와 제4덕트부재는 서로 연결되어 있다. 즉, 제1덕트부재(21)와 제3덕트부재(23)의 입구(21a)와 출구(21b)는 동일하며, 제2덕트부재(22)와 제4덕트부재의 입 구(22a)와 출구(22b)는 동일하다.In addition, the first duct member 21 and the third duct member 23 are connected to each other, and the second duct member 22 and the fourth duct member are connected to each other. That is, the inlet 21a and the outlet 21b of the first duct member 21 and the third duct member 23 are the same, and the inlets 22a of the second duct member 22 and the fourth duct member are the same. The outlet 22b is the same.

히터부재(30)는 다수의 덕트부재(20) 중 일부 덕트부재(20)의 내부에 마련되어 흡착제(15)를 통과하기 직전의 공기를 가열시킨다. 본 실시예에서는 제2덕트부재(22)와 제4덕트부재의 내부에 히터부재(30)가 마련되어 있으며, 이는 일실시예에 불과하다.The heater member 30 is provided inside some of the duct members 20 of the plurality of duct members 20 to heat the air just before passing through the adsorbent 15. In the present embodiment, the heater member 30 is provided inside the second duct member 22 and the fourth duct member, which is just one embodiment.

상기에서 디스크(13) 및 덕트부재(20)의 재질은 VOC에 잘 변형되지 않게 스테인리스(Stainless)나 테프론(Teflon) 등을 사용하는 것이 바람직하며, 히터부재(30)가 위치한 부분의 덕트부재(20)의 재질은 열에 강한 세라믹, 금속 등을 사용하는 것이 바람직하다 하겠다.In the above, the material of the disk 13 and the duct member 20 is preferably made of stainless steel (Ttainlon) or Teflon (Teflon), so as not to be deformed to VOC, the duct member of the portion where the heater member 30 is located ( 20) it is preferable to use a heat-resistant ceramic, metal and the like.

구동수단(미도시)은 디스크(13)를 회전시키며, 모터 등이 될 수 있다.The driving means (not shown) rotates the disk 13 and may be a motor or the like.

제어부(미도시)는 구동수단의 작동을 제어한다. 즉, 흡착제(15)의 파과 시간에 따라 디스크(13)의 회전주기를 조절한다.The controller (not shown) controls the operation of the driving means. That is, the rotation period of the disk 13 is adjusted according to the breakthrough time of the adsorbent 15.

이하, 상기와 같이 구성된 본 발명의 디스크형 필터의 작동 상태를 설명하면 다음과 같다.Hereinafter, the operating state of the disc filter of the present invention configured as described above is as follows.

도 1 및 도 2를 참조하여 설명하면, 제1덕트부재(21)와 제3덕트부재(23)의 입구(21a)로 VOC가 포함된 공기가 흡입된다. 흡입된 공기는 디스크 필터부재(10)의 흡착제(15)를 통과하면서 흡착제(15)에 흡착이 이루어지므로 공기로부터 VOC가 분리된다.1 and 2, air containing VOC is sucked into the inlet 21a of the first duct member 21 and the third duct member 23. Since the sucked air passes through the adsorbent 15 of the disk filter member 10, the adsorbent is adsorbed to the adsorbent 15, so that the VOC is separated from the air.

VOC가 분리된 청정공기는 흡입된 측의 반대측 제1덕트부재(21)와 제3덕트부재(23)의 출구(21b)를 통하여 배출된다.The clean air from which the VOC is separated is discharged through the outlet 21b of the first duct member 21 and the third duct member 23 opposite to the suction side.

이와 동시에 제2덕트부재(22)와 제4덕트부재의 입구(22a)로 공기가 흡입되고, 흡입된 공기는 제2,4덕트부재(22) 내부에 배치된 히터부재(30)에 의해 가열되며, 가열된 가열공기는 흡착제(15)를 통과하며 흡착제(15)에 포함된 VOC를 탈착한다. At the same time, air is sucked into the inlet 22a of the second duct member 22 and the fourth duct member, and the sucked air is heated by the heater member 30 disposed inside the second and fourth duct members 22. The heated heating air passes through the adsorbent 15 and desorbs the VOC contained in the adsorbent 15.

VOC를 포함한 공기는 반대측의 제2,4덕트부재(22)의 출구(22b)를 통하여 배출된다.The air including the VOC is discharged through the outlet 22b of the second and fourth duct members 22 on the opposite side.

흡착제(15)가 파과하기 전에 구동수단에 의해 디스크(13)는 시계방향으로 90도로 회되고, 디스크(13)의 회전에 의해 흡착제(15)의 위치가 바뀌게 된다. Before the adsorbent 15 breaks through, the disk 13 is rotated 90 degrees clockwise by the driving means, and the position of the adsorbent 15 is changed by the rotation of the disk 13.

흡착제(15)의 바뀐 위치에 의해 VOC를 흡착한 흡착제(15)는 제2,4덕트부재(22)로 흡입된 공기가 히터부재(30)에 의해 가열되어 흡착제(15)에 포함된 VOC를 탈착시키고, 반대로 탈착이 이루어진 흡착제(15)에는 제1,3덕트부재(21,23)로 VOC를 포함한 오염공기가 흡입되어 흡착제(15)에 의해 흡착이 이루어져 청정공기로 배출된다.The adsorbent 15 that adsorbs the VOC by the changed position of the adsorbent 15 has the air sucked into the second and fourth duct members 22 heated by the heater member 30 to absorb the VOC contained in the adsorbent 15. The desorbed and desorbed adsorbent 15 is sucked into the first and third duct members 21 and 23 by polluting air including VOC, and is adsorbed by the adsorbent 15 and discharged into clean air.

이와 같이, 흡착제(15)의 흡착과 탈착이 동시에 이루어질 수 있어 효율적이다.In this way, the adsorption and desorption of the adsorbent 15 can be performed simultaneously, which is efficient.

또한, 장기간 사용하여도 무리가 없으며, 장시간 VOC의 분리가 가능하다.In addition, even long-term use is good, and long-term separation of the VOC is possible.

한편, 본 발명의 다른 실시예에 따른 디스크형 필터를 도 3에 도시하였다. 도 3은 본 발명의 제2실시예에 따른 디스크형 필터를 도시한 사시도이다.Meanwhile, FIG. 3 illustrates a disc filter according to another embodiment of the present invention. 3 is a perspective view showing a disc filter according to a second embodiment of the present invention.

도 3에 도시한 바와 같이, 제1,4덕트부재(21,24)가 서로 연결되어 있고, 제2,3덕트부재(22,23)가 서로 연결되어 있다. 제2,3덕트부재(22,23) 내에는 히터부 재(30)가 마련되어 있다.As shown in FIG. 3, the first and fourth duct members 21 and 24 are connected to each other, and the second and third duct members 22 and 23 are connected to each other. The heater member 30 is provided in the second and third duct members 22 and 23.

이러한 경우에는 디스크(13)가 180도 회전된다.In this case, the disk 13 is rotated 180 degrees.

이처럼 덕트부재(20)의 형상은 실시예에 따라 얼마든지 변경하여 실시할 수 있고, 덕트의 형상 및 개수에 따라 디스크(13)의 회전각도가 달라짐은 물론이다.As described above, the shape of the duct member 20 can be changed as many as the embodiment, and the rotation angle of the disk 13 varies according to the shape and number of the ducts.

상술한 바와 같이, 본 발명의 바람직한 실시예를 참조하여 설명하였지만, 해당기술분야의 숙련된 당업자는 하기의 특허청구범위에 기재된 본 발명의 사상 및 영역으로부터 벗어나지 않는 범위 내에서 본 발명을 다양하게 수정 또는 변형하여 실시할 수 있다.As described above, although described with reference to a preferred embodiment of the present invention, those skilled in the art various modifications of the present invention without departing from the spirit and scope of the invention described in the claims below. Or it may be modified.

이상에서 설명한 바와 같은 본 발명의 디스크형 필터에 따르면, 다음과 같은 효과가 있다.According to the disc filter of the present invention as described above, the following effects are obtained.

이와 같이, 흡착제의 흡착과 탈착이 동시에 이루어질 수 있어 효율적이다. 또한, 장기간 사용하여도 무리가 없으며, 장시간 VOC의 분리가 가능하다.As such, the adsorption and desorption of the adsorbent can be performed at the same time, which is efficient. In addition, even long-term use is good, and long-term separation of the VOC is possible.

Claims (2)

내부공간을 가지는 원판형태의 케이스, 상기 케이스의 내부공간 내에 회전가능하게 마련되고, 가장자리를 따라 일정한 간격을 두고 짝수개의 삽입부가 형성되어 있는 디스크와, 상기 삽입부에 각각 장착되는 흡착제를 포함하는 디스크 필터부재;A disk-shaped case having an inner space, a disk rotatably provided in the inner space of the case, a disk including an even number of inserts formed at regular intervals along an edge thereof, and a disk including adsorbents respectively mounted to the inserts. Filter member; 상기 케이스를 관통하여 상기 흡착제를 각각 통과하고, 내부에 공기가 흐르도록 마련된 다수의 덕트부재;A plurality of duct members penetrating through the case and passing through the adsorbents, respectively, to allow air to flow therein; 상기 다수의 덕트부재 중 일부 덕트부재의 내부에 마련되어 상기 흡착제를 통과하기 직전의 공기를 가열시키는 히터부재;A heater member provided inside the duct member of the plurality of duct members to heat air immediately before passing through the adsorbent; 상기 디스크를 회전시키는 구동수단; 및Drive means for rotating the disk; And 상기 구동수단의 작동을 제어하는 제어부;를 포함하는 디스크형 필터.And a controller for controlling the operation of the driving means. 제 1항에 있어서,The method of claim 1, 상기 흡착제는 탄소, 활성탄, 섬유상활성탄, 제올라이트 중 어느 하나인 것을 특징으로 하는 디스크형 필터.The adsorbent is a disk-type filter, characterized in that any one of carbon, activated carbon, fibrous activated carbon, zeolite.
KR1020070049367A 2007-05-21 2007-05-21 Disc type filter KR100816509B1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20000028869A (en) * 1998-10-08 2000-05-25 노르만 시이 린넬;기에르츠 제임스 알 Filter assembly with shaped adsorbent article; and devices and method of use
JP2001232136A (en) 2000-02-21 2001-08-28 Seibu Giken Co Ltd Organic gas treating device
JP2006010307A (en) 2004-05-26 2006-01-12 Mitsubishi Chemicals Corp Humidifier, and humidifying method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20000028869A (en) * 1998-10-08 2000-05-25 노르만 시이 린넬;기에르츠 제임스 알 Filter assembly with shaped adsorbent article; and devices and method of use
JP2001232136A (en) 2000-02-21 2001-08-28 Seibu Giken Co Ltd Organic gas treating device
JP2006010307A (en) 2004-05-26 2006-01-12 Mitsubishi Chemicals Corp Humidifier, and humidifying method

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