EP1530109B1 - Ventilateur et methode pour commander le flux d'air d'un ventilateur - Google Patents

Ventilateur et methode pour commander le flux d'air d'un ventilateur Download PDF

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Publication number
EP1530109B1
EP1530109B1 EP04017423A EP04017423A EP1530109B1 EP 1530109 B1 EP1530109 B1 EP 1530109B1 EP 04017423 A EP04017423 A EP 04017423A EP 04017423 A EP04017423 A EP 04017423A EP 1530109 B1 EP1530109 B1 EP 1530109B1
Authority
EP
European Patent Office
Prior art keywords
installation according
ventilator installation
plates
ventilator
fan
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.)
Expired - Fee Related
Application number
EP04017423A
Other languages
German (de)
English (en)
Other versions
EP1530109A3 (fr
EP1530109A2 (fr
Inventor
Zong Tang Lee
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kyodo-Allied Industries Ltd
Original Assignee
Kyodo-Allied Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kyodo-Allied Industries Ltd filed Critical Kyodo-Allied Industries Ltd
Publication of EP1530109A2 publication Critical patent/EP1530109A2/fr
Publication of EP1530109A3 publication Critical patent/EP1530109A3/fr
Application granted granted Critical
Publication of EP1530109B1 publication Critical patent/EP1530109B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/4226—Fan casings
    • F04D29/4253—Fan casings with axial entry and discharge
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/08—Centrifugal pumps
    • F04D17/16—Centrifugal pumps for displacing without appreciable compression
    • F04D17/165—Axial entry and discharge
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/663—Sound attenuation
    • F04D29/664—Sound attenuation by means of sound absorbing material

Definitions

  • the invention relates to a fan system for controlling the air flow of a fan system.
  • the present invention particularly, but not exclusively, relates to fan airflow control for mitigating noise in a fan in a clean room facility.
  • A is described a filter-fan system having an inlet opening in an upper part of a housing. Inside the housing, a fan is mounted on a plate. The air flow entering via the inlet opening is guided by the fan via four guide elements to baffle plates, which are arranged at an acute angle to one another. Underneath these baffles, there is provided an outlet opening arranged on the underside of the housing, through which the air flows.
  • the baffles reduce air turbulence. This reduces the noise coming from the fan unit.
  • a fan system which is integrated in a housing, wherein an opening in the top of the housing forms an inlet opening and an opening in the bottom of the housing an outlet opening for the air flowing through.
  • a fan is mounted in the inlet opening of the housing.
  • a guide plate for guiding the air flow in the edge region of the housing.
  • further noise reduction panels are provided at the edge of the housing, defining a central opening which is smaller than the outlet opening below.
  • the invention has for its object to provide fan systems of the type mentioned, in which the disadvantages mentioned no longer occur.
  • baffles There may be two pairs of baffles arranged in the fan unit, the baffles each being vertical.
  • the baffles define the outlet opening.
  • the guide baffles can at an angle of 90 ° and 60 °, preferably 90 ° to at least one
  • the baffle plates can be perforated.
  • the perforation may extend over all or a portion of the baffles, and the baffles may be covered by a cloth. Additionally, or alternatively, the baffles may be bent or flat.
  • the outlet opening may take the form of: circular, triangular, square, rectangular, pentagonal or octagonal.
  • At least one pair of plates disposed in the fan assembly and extending between the top and at least one side and connected thereto, at least one pair of plates defining an enclosed space behind.
  • At least one of the plates can be perforated. The perforations may extend over the entire area or over part of at least one of the plates.
  • the plates may be curved or flat, and the plates may be covered by a cloth.
  • the enclosed space may be filled with a noise insulating material.
  • a noise insulating material may be used to line an interior surface of one or more of the following parts: at least one side, the header, the baffle plates, and the plates.
  • a noise insulating material may be attached on the surface of the fan frame.
  • the surface can be a bottom.
  • the blower rack may be in the form of a reverse floor with associated side walls with the noise insulating material in the floor.
  • the headboard may have a central opening.
  • the central opening may have an inlet cover with the inlet opening disposed in the inlet cover.
  • a filter may be located below the outlet opening.
  • At least one side may consist of four vertical sides, wherein the sides are also perpendicular to the headboard.
  • FIG. 1 shows an exploded perspective view of parts of a preferred embodiment of the present invention as part of a fan system.
  • the fan unit comprises four vertical side walls 22 and an annular head portion 17 with a central opening 10.
  • the fan unit is shown in a square shape, it can be a have any shape, such as cylindrical, triangular, rectangular, pentagonal, octagonal, etc.
  • the central opening 10 is shown in square. It may also take another suitable form, e.g. round, triangular, rectangular, pentagonal, octagonal, etc. Preferably, the shape of the central opening 10 is similar to the shape of the fan unit.
  • the air inlet cover 11 lies above the central opening 10 and closes it off.
  • the cover 11 covers the central opening 10 and is larger in size than the opening 10, so that it contacts the head part 17 along the outer surface of the opening 10.
  • the cover 11 is secure, removable and largely flush sealed connected to the head part 17.
  • the cover 11 is also annular and has a central air inlet opening 18.
  • the inlet opening 18 is shown as being round. It may take any form as required or desired, e.g. triangular, quadrangular, rectangular, pentagonal, octagonal, etc. There may be more than one inlet port 18.
  • a wind turbine fan 12 is mounted on a fan blower frame 14 which may have contiguous side walls 15 therewith.
  • the frame 14 may be flat.
  • the frame 14 may also be reversible. Attached to the fan frame 14 there extend from there four rods 13 which are also detachably connected to the air inlet cover 11.
  • a motor for generating rotational movements for the wind turbine fan 12 is not shown, but required for the normal operation of the fan system.
  • the frame 14 may be larger in size than the outlet port 19 in the horizontal plane so as to extend over the outer surface of the outlet port 19.
  • the frame 14 may also be smaller in dimensions than the outlet opening 19 in the horizontal plane.
  • the dimensions of the frame 14 may be of the dimensions of the wind turbine 12th be dependent.
  • the size of the wind turbine fan 12 may depend on the performance requirements of a user.
  • the frame 14 need not be a custom windmill frame.
  • the wind turbine fan 12 may be located in the fan unit and may be mounted on its frame 14.
  • the frame 14 may hang down from the head part 17 via the connection of the rods 13 with the inlet cover 11, and the inlet cover 11 may be supported by the head part 17.
  • the fan 12 can be easily removed through the central opening 10.
  • the central opening should have a corresponding size.
  • the fan unit automatically blows outside air through the air inlet 18 as indicated by arrows 1 in FIG FIG. 2 shown.
  • the air is expelled through the outlet port 19 as indicated by arrows 2 in FIG FIG. 2 shown.
  • Above the outlet opening 19 may be a filter 32 for removing large particles or contaminants.
  • the outlet opening 19 is shown in square. It may take any suitable or desired shape, such as circular, triangular, rectangular, pentagonal, octagonal, etc.
  • the filter 32 may be arranged with clearance in front of the outlet opening 19, or it may be located immediately adjacent to the outlet opening 19.
  • the baffles 28 are located at strategic locations within the fan unit to mitigate the noise there and may also be along the path of the airflow.
  • the baffles 28 extend inwardly from the lower end of the side 22.
  • At least a pair of the baffle plates 28 are mounted on opposite sides of the outlet port 19 and extend inwardly from the side walls 22 to the outlet port 19.
  • the baffles 28 of the pair are substantially identical, opposite, parallel and coplanar.
  • the guide baffles 28 form with the side walls at an angle of 90 ° to 60 °, preferably 90 °.
  • the baffle plates 28 may also define the outlet port 19.
  • the baffles 28 may be planar, as shown, or they may be curved. When curved, they may be curved downwardly toward the outlet opening 19. This is in FIG. 7 illustrated.
  • FIG. 3 shows a complete cross section along the line AA in FIG. 2 and highlights the baffle plates 28.
  • the baffles 28 are arranged to receive the expelled air from the fan blower 12 (see dashed circle) and to direct the airflow 3 within the fan system to and through the outlet port 19 with a minimum of turbulence.
  • At least one pair of plates 26 may be provided for further attenuation of the noise generated by the airflow 3 from the wind turbine fan 12.
  • each plate 26 there are two pairs of plates 26, each perpendicular to each other.
  • the plates 26 extend between the head portion 17 and the sides 22 and are preferably at an angle between 30 ° and 60 °, preferably 45 °, to the sides 22, and thus at an angle between 60 ° and 30 °, preferably 45 ° to the head portion 17.
  • Each plate 26 may be a metal cladding, and may have a matrix with holes or perforations over all or part of its surface.
  • the plates 26 are preferably mounted at the angles indicated above to mitigate the noise generated by the airflow 3 from the wind turbine fan 12 and / or to assist in the control of the airflow 3.
  • each plate 26 may contain perforations.
  • the size of the perforations can determine if the air slows down as it passes through the perforations.
  • a gap 31 is created between each plate, the head portion 17 and the side 22. Due to the gap 31 behind the plates 26, the air pressure in gap 31 increases and is thus identical to the pressure on the perforations from the air flow 3 air pressure at the highest speed. As a result, the air is forced out through the perforations in the plates 26, where the airflow 3 is not so fast.
  • the space 31 may be provided with insulation or other material to mitigate the noise caused by air turbulence.
  • the plate 26 may also be completely or partially perforated.
  • Noise insulating materials may be used to partially or completely fill the gap 31.
  • the noise insulating material may consist of sponge, glass fiber, rock wool, linen cloth, etc.
  • the head portion of the insulation opposite to the air flow 3 may be provided with a protective layer to further strengthen the insulating material against displacement and decay over time.
  • the insulating material 16 may also be mounted on a lower surface of the fan blower frame 14 to further absorb the noise generated by the airflow 3 and the blower 12.
  • the insulating material 16 may be applied to other surfaces of the Frames 14 are attached. If the frame 14 is a reverse floor (as shown), the insulating material 16 may be located within the floor 14.
  • the frame 14 preferably has sides that extend vertically at a height greater than or equal to the thickness of the insulating material 16.
  • One or more of the baffles 28 may be porous, if desired.
  • the porosity can be achieved by perforations over the area of the baffles 28.
  • the perforations may extend over all or part of their surface.
  • baffle covers may be placed over baffles 28 and plates 26 over all or a portion of the insulating material or beyond the perforations to reduce the likelihood of air displacement and contamination.
  • the perforations may be helpful in securing the insulating material of the baffles 28 and plates 26.
  • the baffle plates 28 direct the airflow 3 to the outlet port 19 and may be flat or curved.
  • the side walls 22 may have insulation 36 over all or part of their interior surfaces.
  • the insulating material 36 may have a greater thickness than the insulating material (s) 6 and / or 16. It may consist of sponge, fiberglass, rock wool, linen cloth and may have a cloth covering. Some or all of the insulating materials 6, 16, 36 may have reinforcing frames as required or desired.
  • the guide baffles 28 and the fan frame 14 between them create one or more air flow channels 20 through which the air is blown to the outlet port 19 and thus through the filter 32.
  • the air flow passages extend around the outer surface of the outlet port 19.
  • the outlet airflow 2 may circulate through the filter 32. This also applies to the embodiment as in FIG. 7 shown.
  • the air flow channels 20 create a constriction of the air flow, and therefore form an air high pressure zone.
  • the air flows from high pressure to low pressure. This forces all of the air to flow through the channels 20, causing the airflow to move very strongly in only one direction through the outlet port 19, since the air generally does not flow from low pressure to high pressure.
  • the turbulence in the channels 20 and the outlet opening 19 are considerably reduced. As such, the noise is significantly attenuated and airflow throughput is increased.
  • FIG. 6 Figure 11 is a graph comparing the average velocity v of the airflow and the noise level N of a fan system of the present invention with the values without the present invention.
  • the average speed v of the air flow is measured at 24 different points in the installation installation of the fan, as in FIG. 5 is illustrated.
  • FIG. 6 (a) a conventional fan system is shown, whereas the FIGS. 6 (b) and 6 (c) are related to the present invention.
  • the average velocity v of the air at both of FIGS. 6 (b) and 6 (c) is higher, and the noise level N is lower than in FIG. 6 (a).
  • the pressure loss of the fan units 6 (b) and 6 (c) is smaller than in FIG. 6 (a). Therefore, energy savings can be achieved over time.
  • the noise level N in decibels from a fan unit of the preferred form of the present invention is compared to a non-preferred form, and it starts measured a spot 1.5 meters below the outlet of the plant.
  • one embodiment of the present invention may allow the fan unit to be operated with less noise than a fan unit of the prior art.
  • FIGS. 1 to 7 With emphasis on a method and system for mitigating noise in a fan unit, it should be understood that the figures are for illustrative purposes only and should not be considered as limiting the invention. In addition, it will be appreciated that the method and apparatus of the present invention provide benefits for many applications where airflow control is required. It is intended that many changes and modifications may be made to the skill of the art without departing from the spirit and scope of the invention as described.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Claims (28)

  1. Ensemble de ventilateur, comprenant :
    une partie de tête avec au moins une ouverture d'admission (18),
    au moins un côté qui entoure l'ensemble de ventilateur,
    une ouverture d'évacuation (19),
    une soufflante centrifuge (12) montée sur un support (14), la soufflante centrifuge (12) servant à aspirer' de l'air par l'ouverture d'admission (18) et à expulser l'air par l'ouverture d'évacuation (19),
    caractérisé en ce qu'il est prévu au moins une paire de plaques déflectrices de guidage (28) qui s'étendent vers l'intérieur depuis une extrémité inférieure du côté au moins unique en direction de l'ouverture d'évacuation (19) et qui définissent l'ouverture d'évacuation (19), sachant qu'est formé, entre la paire au moins unique de plaques déflectrices de guidage (28) et le support (14), un canal d'écoulement d'air (20) qui produit un rétrécissement du flux d'air (3) pour former une zone à haute pression d'air, de sorte que la totalité de l'air est forcée à s'écouler par le canal d'écoulement d'air (20) et à produire ainsi un flux d'air (3) essentiellement dirigé à turbulence réduite dans le canal d'écoulement d'air (20) et à travers l'ouverture d'évacuation (19), réduisant ainsi le bruit produit par ledit ensemble de ventilateur.
  2. Ensemble de ventilateur selon la revendication 1, caractérisé en ce que le support est un support de soufflante (14).
  3. Ensemble de ventilateur selon la revendication 1 ou 2, caractérisé en ce que deux paires de plaques déflectrices de guidage (28) sont installées dans l'ensemble de ventilateur, les plaques déflectrices de guidage respectives (28) étant perpendiculaires entre elles.
  4. Ensemble de ventilateur selon l'une des revendications 1 à 3,
    caractérisé en ce que les plaques déflectrices de guidage (28) sont disposées sous un angle compris entre 90° et 60° par rapport au côté au moins unique.
  5. Ensemble de ventilateur selon la revendication 4, caractérisé en ce que l'angle est égal à 90°.
  6. Ensemble de ventilateur selon l'une des revendications 1 à 5,
    caractérisé en ce que les plaques déflectrices de guidage (28) sont perforées.
  7. Ensemble de ventilateur selon la revendication 6, caractérisé en ce que les perforations ne s'étendent que sur une partie des plaques déflectrices de guidage (28).
  8. Ensemble de ventilateur selon la revendication 6, caractérisé en ce que les perforations s'étendent sur la totalité des plaques déflectrices de guidage (28).
  9. Ensemble de ventilateur selon la revendication 7 ou 8, caractérisé en ce que les perforations sont recouvertes par une toile.
  10. Ensemble de ventilateur selon l'une des revendications 1 à 9,
    caractérisé en ce que l'ouverture d'évacuation (19) est réalisée circulaire, triangulaire, carrée, rectangulaire, pentagonale ou octogonale.
  11. Ensemble de ventilateur selon l'une des revendications 1 à 10,
    caractérisé en ce que les plaques déflectrices de guidage (28) sont incurvées.
  12. Ensemble de ventilateur selon l'une des revendications 1 à 11,
    caractérisé en ce qu'il comprend au moins une paire de plaques (26) qui sont installées dans l'ensemble de ventilateur et s'étendent entre la partie de tête (17) et le côté au moins unique, sachant que chaque paire de plaques (26) forme un espace intermédiaire fermé entre la paire de plaques (26) au moins unique, la partie de tête (17) et le côté au moins unique.
  13. Ensemble de ventilateur selon la revendication 12, caractérisé en ce que les plaques (26) se trouvent sous un angle compris entre 30° et 60° par rapport à la partie de tête (17).
  14. Ensemble de ventilateur selon la revendication 13, caractérisé en ce que l'angle est égal à 45°.
  15. Ensemble de ventilateur selon l'une des revendications 12 à 14,
    caractérisé en ce que deux paires de plaques (26) sont présentes, et les plaques respectives (26) sont perpendiculaires entre elles.
  16. Ensemble de ventilateur selon l'une des revendications 12 à 15,
    caractérisé en ce qu'au moins une paire de plaques (26) est perforée.
  17. Ensemble de ventilateur selon la revendication 16, caractérisé en ce que les perforations s'étendent sur la totalité des plaques (26) de la paire au moins unique.
  18. Ensemble de ventilateur selon la revendication 16, caractérisé en ce que les perforations ne s'étendent que sur une partie des plaques (26) de la paire au moins unique.
  19. Ensemble de ventilateur selon l'une des revendications 16 à 18,
    caractérisé en ce que les perforations sont recouvertes par une toile.
  20. Ensemble de ventilateur selon l'une des revendications 12 à 19,
    caractérisé en ce que les plaques (26) sont incurvées.
  21. Ensemble de ventilateur selon l'une des revendications 12 à 20,
    caractérisé en ce que l'espace intermédiaire fermé est rempli au moins partiellement de matériau insonorisant (6).
  22. Ensemble de ventilateur selon l'une des revendications 1 à 21,
    caractérisé en ce qu'on utilise un matériau insonorisant (16) pour habiller une face intérieure d'un ou plusieurs des éléments suivants : le côté au moins unique, la partie de tête (17), les plaques déflectrices de guidage (28) et les plaques (26).
  23. Ensemble de ventilateur selon l'une des revendications 1 à 22,
    caractérisé en ce qu'un matériau insonorisant (36) est installé sur la surface du support de soufflante (14).
  24. Ensemble de ventilateur selon l'une des revendications 1 à 23,
    caractérisé en ce que le support de soufflante (14) présente la forme d'un fond intérieur avec des parois latérales (22) solidarisées à ce fond, et en ce que le matériau insonorisant (36) se trouve dans le fond.
  25. Ensemble de ventilateur selon l'une des revendications 1 à 24,
    caractérisé en ce que la partie de tête (17) présente une ouverture centrale (10) qui dispose d'un couvercle d'admission, l'ouverture d'admission (18) se trouvant dans le couvercle d'admission.
  26. Ensemble de ventilateur selon l'une des revendications 1 à 25,
    caractérisé en ce qu'il présente un filtre (32) installé en dessous de l'ouverture d'évacuation (19).
  27. Ensemble de ventilateur selon l'une des revendications 1 à 26,
    caractérisé en ce que le côté au moins unique comprend quatre parois latérales (22) perpendiculaires entre elles, et en ce que les parois latérales respectives (22) sont également disposées perpendiculairement à la partie de tête (17).
  28. Ensemble de ventilateur selon l'une des revendications 1 à 27,
    caractérisé en ce que les plaques déflectrices (28) utilisées dans l'ensemble de ventilateur sont conçues comme plaques déflectrices de diffusion ou comme plaques déflectrices de guidage.
EP04017423A 2003-11-05 2004-07-23 Ventilateur et methode pour commander le flux d'air d'un ventilateur Expired - Fee Related EP1530109B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SG200306562-0A SG142128A1 (en) 2003-11-05 2003-11-05 Fan unit air flow control
SG200306562 2003-11-05

Publications (3)

Publication Number Publication Date
EP1530109A2 EP1530109A2 (fr) 2005-05-11
EP1530109A3 EP1530109A3 (fr) 2006-01-18
EP1530109B1 true EP1530109B1 (fr) 2008-03-12

Family

ID=34432639

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04017423A Expired - Fee Related EP1530109B1 (fr) 2003-11-05 2004-07-23 Ventilateur et methode pour commander le flux d'air d'un ventilateur

Country Status (5)

Country Link
US (1) US20050092544A1 (fr)
EP (1) EP1530109B1 (fr)
CN (1) CN1614243A (fr)
DE (1) DE502004006474D1 (fr)
SG (1) SG142128A1 (fr)

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US20100112929A1 (en) * 2008-11-03 2010-05-06 Airex Inc. Recessed fan inlet cover
WO2011124186A2 (fr) * 2011-05-16 2011-10-13 华为技术有限公司 Dissipateur de chaleur et dispositif de communication extérieur
AU2012216661B2 (en) 2011-09-13 2016-09-01 Black & Decker Inc Air ducting shroud for cooling an air compressor pump and motor
US8899378B2 (en) 2011-09-13 2014-12-02 Black & Decker Inc. Compressor intake muffler and filter
US11111913B2 (en) 2015-10-07 2021-09-07 Black & Decker Inc. Oil lubricated compressor
JP6134407B2 (ja) * 2016-02-24 2017-05-24 ミネベアミツミ株式会社 遠心式ファン
DE102016226157A1 (de) * 2016-12-23 2018-06-28 Ziehl-Abegg Se Ventilatormodul sowie Anordnung eines oder mehrerer solcher Ventilatormodule in einem Strömungskanal
CN108906795B (zh) * 2018-08-21 2024-04-02 镇江裕太防爆电加热器有限公司 一种用于三角形镁管烧结设备的吹扫结构
CN111984090A (zh) * 2020-09-28 2020-11-24 苏州浪潮智能科技有限公司 一种风扇挡板、风扇模组及机箱
CN112957833A (zh) * 2021-03-10 2021-06-15 惠亚科技（苏州）有限公司 一种过滤设备
CN113202262B (zh) * 2021-05-25 2022-09-09 浙江宁溢电力工程设计咨询有限公司 一种地下变电所的通风装置

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US3085647A (en) * 1960-11-07 1963-04-16 Jenn Air Products Company Inc Acoustic curb
US4560395A (en) * 1984-04-17 1985-12-24 Environmental Air Control, Inc. Compact blower and filter assemblies for use in clean air environments
US4990290A (en) * 1989-05-08 1991-02-05 Gill James G Diffusion fogger
DE4412583C1 (de) * 1994-04-13 1995-09-14 Daldrop & Dr Ing Huber Gmbh & Ventilator-Filtereinheit für Reinraumdecken
US5470363A (en) * 1995-01-13 1995-11-28 Envirco Corporation Air blower and filter assemblies
US5801342A (en) * 1997-01-27 1998-09-01 Lindab Ab Double-walled structure and method and arrangement for producing the same
EP1019659B1 (fr) * 1997-09-03 2004-01-21 Kyodo-Allied Industries Limited Procede et appareil pour minimiser le bruit provenant d'une unite de filtrage a soufflerie
US6217281B1 (en) * 1999-06-30 2001-04-17 Industrial Technology Research Institute Low-noise fan-filter unit
US6592451B2 (en) * 2001-02-26 2003-07-15 Kyodo-Allied Industries Ltd Fan unit
WO2002068879A1 (fr) * 2001-02-26 2002-09-06 Kyodo-Allied Industries Ltd Unite ventilateur

Also Published As

Publication number Publication date
EP1530109A3 (fr) 2006-01-18
DE502004006474D1 (de) 2008-04-24
EP1530109A2 (fr) 2005-05-11
US20050092544A1 (en) 2005-05-05
CN1614243A (zh) 2005-05-11
SG142128A1 (en) 2008-05-28

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