EP0772007B1 - Ventilateur à jet d'air - Google Patents

Ventilateur à jet d'air Download PDF

Info

Publication number
EP0772007B1
EP0772007B1 EP96117214A EP96117214A EP0772007B1 EP 0772007 B1 EP0772007 B1 EP 0772007B1 EP 96117214 A EP96117214 A EP 96117214A EP 96117214 A EP96117214 A EP 96117214A EP 0772007 B1 EP0772007 B1 EP 0772007B1
Authority
EP
European Patent Office
Prior art keywords
jet fan
jet
booster ring
casing
booster
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 - Lifetime
Application number
EP96117214A
Other languages
German (de)
English (en)
Other versions
EP0772007A3 (fr
EP0772007A2 (fr
Inventor
Masaru Murayama
Shigeki Kondo
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.)
Panasonic Ecology Systems Co Ltd
Original Assignee
Matsushita Ecology Systems Co 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 Matsushita Ecology Systems Co Ltd filed Critical Matsushita Ecology Systems Co Ltd
Publication of EP0772007A2 publication Critical patent/EP0772007A2/fr
Publication of EP0772007A3 publication Critical patent/EP0772007A3/fr
Application granted granted Critical
Publication of EP0772007B1 publication Critical patent/EP0772007B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/38—Blades
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F24F7/007—Ventilation with forced flow
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
    • E21F1/003—Ventilation of traffic tunnels
    • 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
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/54—Fluid-guiding means, e.g. diffusers
    • F04D29/541—Specially adapted for elastic fluid pumps
    • F04D29/545—Ducts

Definitions

  • the present invention relates to an axial fan mounted on a ceiling portion of a tunnel for blowing out a jet to ventilate the inside of the tunnel.
  • This kind of axial fan is generally called the jet fan.
  • the jet fan mounted in the tunnel generates a thrust to induce a longitudinal flow of air for ventilation of air inside the tunnel.
  • the air inside the tunnel receives from the jet fan a pressure equal to a value obtained by dividing the generated thrust by the sectional area of the tunnel.
  • Fig. 9 depicts a conventional jet fan comprising a cylindrical casing 101, an electric motor 102 accommodated therein, and an impeller 103 directly connected to the electric motor 102.
  • the jet fan shown in Fig. 9 also comprises generally cylindrical front and rear silencers 104 for absorbing noise generated by the impeller 103.
  • Fig. 10 depicts another conventional jet fan having a plurality of inlet guide vanes 105.
  • Fig. 11 depicts a further conventional jet fan having a plurality of outlet guide vanes 106.
  • FR 1 601 611 A representing the closest prior art from which the invention proceeds discloses a jet fan for ventilating an inside of a tunnel, said jet fan comprising a generally cylindrical casing, an electric motor accommodated therein, an impeller connected to the electric motor, and a booster ring disposed concentrically with the casing and located downstream thereof with respect to a direction of an air flow.
  • the thrust generated thereby is determined as the product of three values, the air density, the mass low rate passing through the jet fan, and the speed of a jet blown out of a silencer. Accordingly, only an increase in either the mass flow rate or the speed of the jet results in an increase in thrust.
  • Another objective of the present invention is to provide the jet fan of the above-described type which has a simple construction and can be manufactured at a low cost.
  • a jet fan for ventilating an inside of a tunnel, said jet fan comprising a generally cylindrical casing, an electric motor accommodated therein, an impeller connected to the electric motor, and a booster ring disposed concentrically with the casing and located downstream thereof with respect to a direction of an air flow, characterized by said booster ring having a leading edge facing an air outlet of the jet fan and a trailing edge of a diameter smaller than that of the leading edge but greater than that of the air outlet, said booster ring also having an aerofoil sectional profile or an arcuated plate sectional profile as viewed in a direction transverse to a longitudinal axis of the casing and having an upper surface of aerofoil or arcuated plate sectional profile as its inner surface, and said booster ring being secured to the generally cylindrical casing via a plurality of radial ribs having one of a polygonal section, a round section, and a streamline section.
  • a jet fan for ventilating an inside of a tunnel
  • said jet fan comprising a generally cylindrical casing, an electric motor accommodated therein, an impeller connected to the electric motor, and a booster ring disposed concentrically with the casing and located downstream thereof with respect to a direction of an air flow, characterized by said booster ring having a leading edge facing an air outlet of the jet fan and a trailing edge of a diameter smaller than that of the leading edge but greater than that of the air outlet, said booster ring also having an aerofoil sectional profile or an arcuated plate sectional profile as viewed in a direction transverse to a longitudinal axis of the casing and having an upper surface of aerofoil or arcuated plate sectional profile as its inner surface, and said booster ring being secured to a ceiling of the tunnel via a support rod.
  • booster ring disposed concentrically with the casing and located downstream thereof with respect to the direction of the air flow.
  • the above-described construction generates a lift and a drag on the booster ring by making use of a flow of air resulting from ambient air drawn into a high-speed jet.
  • a resultant force of the lift and the drag has an axial component force directed opposite to the direction of the jet and creating a thrust on the booster ring.
  • the jet fan of the present invention can further increase the air pressure inside the tunnel compared with the conventional jet fan having no booster ring.
  • the jet fan comprises a generally cylindrical casing 1, an electric motor 2 accommodated therein, an impeller 3 directly connected to the electric motor 2, and generally cylindrical front and rear silencers 4 for absorbing noise generated by the impeller 3.
  • the jet fan further comprises a booster ring 8 having an aerofoil or arcuated plate sectional profile as viewed in a direction transverse to the longitudinal axis of the casing 1.
  • the booster ring 8 is secured to the generally cylindrical rear silencer 4 in concentric relation therewith via a plurality of radial ribs 7.
  • the booster ring 8 has an upper surface of aerofoil or arcuated plate sectional profile as its inner surface, and also has a leading edge facing an air or jet outlet of the jet fan and a trailing edge of a diameter smaller than that of the leading edge but greater than that of the air outlet.
  • Fig. 7 indicates one example of measurement results of the thrust Tt exerting on the booster ring 8 while Fig. 8 depicts a booster ring used in the measurement.
  • Fig. 7 indicates a relationship between the distance (x) from the jet outlet (outlet diameter: 100 mm) to the leading edge of the booster ring 8 and the thrust Tt exerting on the booster ring with the speed of the jet as a parameter.
  • Fig. 7 reveals that the thrust Tt has been generated on the booster ring when the speed of the jet is 8 m/s, 17.7 m/s, 21.7 m/s or 27.7 m/s and when the distance (x) ranges 0 to 350 mm.
  • the jet receives a booster force Fj in the direction of the jet. Accordingly, the provision of the booster ring 8 as shown in Fig. 1 allows the jet fan to have an increased thrust and a higher efficiency, thus making it possible to increase the air pressure inside the tunnel.
  • the booster ring 8 may have an arcuated plate section as far as it has a streamline-shaped inner surface. It is further to be noted that the booster ring 8 may be made of a ring-shaped generally flat plate. In this case, however, the generally flat plate is bent so as to have a radially inwardly protruding generally arcuated shape in the direction of the jet.
  • radial ribs 7 may have a polygonal section such as a rectangular section or a round section, they preferably have a streamline section to reduce air resistance or pressure loss.
  • Fig. 2 depicts a jet fan according to a second embodiment of the present invention, which is of a structure similar to the jet fan of Fig. 1, but further comprises a plurality of inlet guide vanes 5 fixedly mounted around the electric motor 2 located upstream of the impeller 3 with respect to a direction of the air flow.
  • Fig. 3 depicts a jet fan according to a third embodiment of the present invention, which is of a structure similar to the jet fan of Fig. 1, but further comprises a plurality of outlet guide vanes 6 fixedly mounted around the electric motor 2 located downstream of the impeller 3 with respect to the direction of the air flow.
  • Each of the structures shown in Figs. 2 and 3 can reduce the rotating component of the air flow generated by the impeller 3. Accordingly, the thrust generated by the jet fan and the efficiency thereof can be further enhanced, compared with the jet fan of Fig. 1, to thereby increase the air pressure inside the tunnel.
  • Fig. 4 depicts a jet fan according to a fourth embodiment of the present invention, which is of a structure identical to the jet fan of Fig. 1, but has another booster ring 8 secured to the generally cylindrical rear silencer 4 in concentric relation therewith via a plurality of radial ribs 7.
  • jet fan shown in Figs. 1 to 4 has one or two booster rings 8, it may have three or more booster rings disposed concentrically with one another.
  • Fig. 5 depicts a jet fan according to a fifth embodiment of the present invention, which comprises a generally cylindrical casing 1, an electric motor 2 accommodated therein, an impeller 3 directly connected to the electric motor 2, and generally cylindrical front and rear silencers 4.
  • the jet fan of Fig. 5 further comprises a booster ring 8 not connected directly thereto but secured to the ceiling of the tunnel via a support rod 9 so that the casing 1 and the booster ring 8 are axially aligned in concentric relation.
  • one or more booster rings 8 disposed concentrically with the casing 1 contribute to an increase in thrust and also in efficiency, thus increasing the air pressure inside the tunnel. Accordingly, supposing that the amount of ventilation required is the same, the jet fan of the present invention can reduce the power consumption or the number thereof can be reduced compared with the conventional case.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Claims (2)

  1. Un ventilateur à jet d'air servant à ventiler l'intérieur d'un tunnel, ledit ventilateur à jet d'air comprenant un carter généralement cylindrique (1), un moteur électrique (2) qui y est logé, une aube (3) reliée au moteur électrique (2), et un anneau booster (8) placé concentriquement au carter (1) et situé à son aval par rapport à une direction d'écoulement d'air, caractérisé en ce que :
    ledit anneau booster (8) a un bord d'attaque en face d'une sortie d'air du ventilateur à jet d'air et un bord de queue ayant un diamètre inférieur à celui du bord d'attaque mais supérieur à celui de la sortie d'air,
    ledit anneau booster (8) a également un profil aérodynamique ou un profil de section de plaque arciforme lorsque vu dans une direction transversale à l'axe longitudinal du carter (1) et comporte comme surface intérieure une surface supérieure de profil aérodynamique ou de plaque arciforme, et
    ledit anneau booster (8) est soit solidement fixé au carter généralement cylindrique (1) par l'intermédiaire d'une pluralité de nervures radiales (7) ayant une section polygonale, une section ronde ou une section carénée, soit solidement fixé au plafond du tunnel par l'intermédiaire d'une tige de support (9).
  2. Le ventilateur à jet d'air selon la revendication 1 comprenant en outre un autre anneau booster (8) placé concentriquement au carter (1) et situé à son aval par rapport à la direction d'écoulement de l'air.
EP96117214A 1995-10-30 1996-10-26 Ventilateur à jet d'air Expired - Lifetime EP0772007B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP281282/95 1995-10-30
JP28128295 1995-10-30
JP28128295A JP3575891B2 (ja) 1995-10-30 1995-10-30 ブースターファン

Publications (3)

Publication Number Publication Date
EP0772007A2 EP0772007A2 (fr) 1997-05-07
EP0772007A3 EP0772007A3 (fr) 2000-05-03
EP0772007B1 true EP0772007B1 (fr) 2004-02-04

Family

ID=17636907

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96117214A Expired - Lifetime EP0772007B1 (fr) 1995-10-30 1996-10-26 Ventilateur à jet d'air

Country Status (5)

Country Link
EP (1) EP0772007B1 (fr)
JP (1) JP3575891B2 (fr)
KR (1) KR0174803B1 (fr)
DE (1) DE69631459T2 (fr)
TW (1) TW397888B (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD747453S1 (en) 2014-01-09 2016-01-12 Dyson Technology Limited Fan
USD747454S1 (en) 2014-01-09 2016-01-12 Dyson Technology Limited Fan
US9459020B2 (en) 2008-05-30 2016-10-04 Airius Ip Holdings, Llc Columnar air moving devices, systems and methods
USD783795S1 (en) 2012-05-15 2017-04-11 Airius Ip Holdings, Llc Air moving device
USD805176S1 (en) 2016-05-06 2017-12-12 Airius Ip Holdings, Llc Air moving device
USD820967S1 (en) 2016-05-06 2018-06-19 Airius Ip Holdings Llc Air moving device

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120195749A1 (en) 2004-03-15 2012-08-02 Airius Ip Holdings, Llc Columnar air moving devices, systems and methods
GB2486889B (en) * 2010-12-23 2017-09-06 Dyson Technology Ltd A fan
GB2486892B (en) 2010-12-23 2017-11-15 Dyson Technology Ltd A fan
GB2486890B (en) * 2010-12-23 2017-09-06 Dyson Technology Ltd A fan
AU2012271640B2 (en) 2011-06-15 2015-12-03 Airius Ip Holdings, Llc Columnar air moving devices, systems and methods
GB2492963A (en) 2011-07-15 2013-01-23 Dyson Technology Ltd Fan with scroll casing decreasing in cross-section
GB2492962A (en) 2011-07-15 2013-01-23 Dyson Technology Ltd Fan with tangential inlet to casing passage
GB2492961A (en) 2011-07-15 2013-01-23 Dyson Technology Ltd Fan with impeller and motor inside annular casing
CA2875347C (fr) 2013-12-19 2022-04-19 Airius Ip Holdings, Llc Dispositifs, systemes et procedes de deplacement d'air en colonne
CA2875339A1 (fr) 2013-12-19 2015-06-19 Airius Ip Holdings, Llc Dispositifs, systemes et procedes de deplacement d'air en colonne
CA2953226C (fr) 2014-06-06 2022-11-15 Airius Ip Holdings, Llc Dispositifs, systemes et procedes de deplacement d'air en colonne
CA2968317A1 (fr) * 2014-11-21 2016-05-26 Airius Ip Holdings, Llc Appareil de ventilation
JP6518122B2 (ja) * 2015-04-28 2019-05-22 エビスマリン株式会社 流体流動装置
US10487852B2 (en) 2016-06-24 2019-11-26 Airius Ip Holdings, Llc Air moving device
USD886275S1 (en) 2017-01-26 2020-06-02 Airius Ip Holdings, Llc Air moving device
USD885550S1 (en) 2017-07-31 2020-05-26 Airius Ip Holdings, Llc Air moving device
KR102166065B1 (ko) 2018-08-06 2020-10-15 주식회사 코스칼드바이오 생체 용해성 마이크로니들 어레이 및 이의 제작 방법
USD887541S1 (en) 2019-03-21 2020-06-16 Airius Ip Holdings, Llc Air moving device
AU2020257205A1 (en) * 2019-04-17 2021-11-04 Airius Ip Holdings, Llc Air moving device with bypass intake
CN110207307A (zh) * 2019-07-01 2019-09-06 兰州大学 一种室内智能通风系统
GB2594045A (en) * 2020-03-31 2021-10-20 Titon Hardware Fans for ventilation

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1181456A (fr) * 1957-08-07 1959-06-16 Dispositif destiné à améliorer les performances d'un corps fuselé propulsé dans un fluide
AT308807B (de) * 1968-01-15 1973-06-15 Sina In Nat Autostradali Anlage zur laengsbelueftung eines einbahnigen tunnels
JPH08121836A (ja) * 1994-10-25 1996-05-17 Matsushita Electric Ind Co Ltd ジェットファンおよび推力増強装置

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9459020B2 (en) 2008-05-30 2016-10-04 Airius Ip Holdings, Llc Columnar air moving devices, systems and methods
USD783795S1 (en) 2012-05-15 2017-04-11 Airius Ip Holdings, Llc Air moving device
USD747453S1 (en) 2014-01-09 2016-01-12 Dyson Technology Limited Fan
USD747454S1 (en) 2014-01-09 2016-01-12 Dyson Technology Limited Fan
USD805176S1 (en) 2016-05-06 2017-12-12 Airius Ip Holdings, Llc Air moving device
USD820967S1 (en) 2016-05-06 2018-06-19 Airius Ip Holdings Llc Air moving device

Also Published As

Publication number Publication date
DE69631459D1 (de) 2004-03-11
KR970021784A (ko) 1997-05-28
JPH09126194A (ja) 1997-05-13
EP0772007A3 (fr) 2000-05-03
TW397888B (en) 2000-07-11
EP0772007A2 (fr) 1997-05-07
JP3575891B2 (ja) 2004-10-13
DE69631459T2 (de) 2004-06-24
KR0174803B1 (ko) 1999-03-20

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