EP2492515B1 - Helico centrifugal fan - Google Patents

Helico centrifugal fan Download PDF

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Publication number
EP2492515B1
EP2492515B1 EP12154849.9A EP12154849A EP2492515B1 EP 2492515 B1 EP2492515 B1 EP 2492515B1 EP 12154849 A EP12154849 A EP 12154849A EP 2492515 B1 EP2492515 B1 EP 2492515B1
Authority
EP
European Patent Office
Prior art keywords
air
cone
fan
silencer
centrifugal 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.)
Active
Application number
EP12154849.9A
Other languages
German (de)
French (fr)
Other versions
EP2492515A3 (en
EP2492515A2 (en
Inventor
Marius Gamissans Bou
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.)
Soler and Palau Research SL
Original Assignee
Soler and Palau Research SL
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 Soler and Palau Research SL filed Critical Soler and Palau Research SL
Priority to PL12154849T priority Critical patent/PL2492515T3/en
Publication of EP2492515A2 publication Critical patent/EP2492515A2/en
Publication of EP2492515A3 publication Critical patent/EP2492515A3/en
Application granted granted Critical
Publication of EP2492515B1 publication Critical patent/EP2492515B1/en
Active 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
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/06—Helico-centrifugal pumps
    • 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
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/24—Means for preventing or suppressing noise
    • 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
    • F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
    • F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
    • F24F7/065—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit fan combined with single duct; mounting arrangements of a fan in a duct

Definitions

  • the present invention relates to air driving means used in ventilation systems, proposing a helico centrifugal tubular fan intended for being intercalated in an air duct, with structural features determining an advantageous embodiment of soundproofing.
  • axial tubular fans which are intercalated in air circulation ducts, the body of these fans formed by a cylindrical casing in which an air driving element and the operating elements for the operation thereof are housed, said casing being connected by its ends to an air circulation duct.
  • the conventional solution that is adopted is to arrange independent silencers of the fan itself, which silencers are incorporated on the sections of the air duct to which the fan is connected or intercalated between said sections of the air duct and the fan, in front of and behind the fan, which determines a considerable longitudinal extension of the fan, said extension further being determined by the diameter of the air duct in which the fan is arranged since a longer length of the silencers is required the larger the diameter of the duct.
  • Further prior art fans are known from WO 2011/015680 A1 , EP 0837245 A2 and NL 7305759 A .
  • a helico centrifugal fan is proposed according to the invention, developed with structural features determining an advantageous soundproofing arrangement with respect to conventional embodiments.
  • This fan object of the invention is defined in its broadest formulation by the appended independent claim 1 and comprises a structural assembly formed by an air convergence cone and an air divergence cone which determine connections for connecting to air ducts, an air driving propeller associated with a drive motor being included in the air divergence cone, whereas a silencer is intercalated between the two cones determining an intermediate conduit between both.
  • a fan is thus obtained which is suitably soundproofed with a reduced longitudinal dimension, since the silencer arranged between the structural cones has a smaller diameter than the outer openings of said cones and therefore it requires less length in comparison with the silencers arranged in extension of said outer openings in conventional fans.
  • the silencer arranged between the structural cones of the fan can further be determined with an extension onto one or both structural cones, whereby achieving an even greater soundproofing effect with the same fan longitudinal dimension.
  • said fan object of the invention has very advantageous constructive and functional features, acquiring its own identity and preferable character with respect to conventional fans of the same type.
  • the object of the invention relates to a helico centrifugal fan of the type comprising a tubular casing (1), inside which there is housed a structural assembly made up of an air convergence cone (2) and an air divergence cone (3), which determine an air passage duct, an air driving propeller (4) associated with a drive motor (5) being housed in the air divergence cone (3), all of this forming an assembly intended for being intercalated in an air duct, to which the ends of the tubular casing (1) are coupled.
  • the helico centrifugal fan proposed according the invention is formed with the air convergence cone (2) and the air divergence cone (3) axially separated, including a silencer (7) between them arranged between the narrowest parts thereof, as observed in Figure 2 .
  • the silencer (7) is thus included inside the fan assembly, in an area of smaller diameter than the coupling ends for being coupled to the application air duct, so said silencer (7) requires a much short length than the silencers (6) arranged in extension of the end of conventional helico centrifugal fans do.
  • the soundproofing silencer (7) can be arranged such that it extends onto the air convergence cone (2) of the fan, as shown in Figure 4 , or onto the air divergence cone (3), as shown in Figure 5 , or onto both cones (2 and 3), as shown in Figure 6 , a greater soundproofing effect with the same total length of the fan being achieved with these forms.
  • said complimentary silencer (8) comprising two concentric cylindrical bodies (8.1 and 8.2), which are in correspondence outside and inside the air passage, whereby increasing the soundproofing of the fan maintaining its structural longitudinal dimension.

Description

    Field of the Art
  • The present invention relates to air driving means used in ventilation systems, proposing a helico centrifugal tubular fan intended for being intercalated in an air duct, with structural features determining an advantageous embodiment of soundproofing.
    • State of the Art
  • In both domestic and industrial ventilation systems, it is important to prevent the noise which the fans produce when operating from propagating through the structures supporting the system, which is conventionally solved by arranging the fans with soundproofing solutions.
  • On the other hand, axial tubular fans are known which are intercalated in air circulation ducts, the body of these fans formed by a cylindrical casing in which an air driving element and the operating elements for the operation thereof are housed, said casing being connected by its ends to an air circulation duct.
  • With this such fans high air driving performance for ventilation is achieved, particularly with those having a helico centrifugal propeller, but the installation assembly of these fans intercalated in air ducts favors the transmission of the noise of the operation through said air circulation ducts.
  • To solve this problem, the conventional solution that is adopted is to arrange independent silencers of the fan itself, which silencers are incorporated on the sections of the air duct to which the fan is connected or intercalated between said sections of the air duct and the fan, in front of and behind the fan, which determines a considerable longitudinal extension of the fan, said extension further being determined by the diameter of the air duct in which the fan is arranged since a longer length of the silencers is required the larger the diameter of the duct. Further prior art fans are known from WO 2011/015680 A1 , EP 0837245 A2 and NL 7305759 A .
    • Object of the Invention
  • A helico centrifugal fan is proposed according to the invention, developed with structural features determining an advantageous soundproofing arrangement with respect to conventional embodiments.
  • This fan object of the invention is defined in its broadest formulation by the appended independent claim 1 and comprises a structural assembly formed by an air convergence cone and an air divergence cone which determine connections for connecting to air ducts, an air driving propeller associated with a drive motor being included in the air divergence cone, whereas a silencer is intercalated between the two cones determining an intermediate conduit between both.
  • A fan is thus obtained which is suitably soundproofed with a reduced longitudinal dimension, since the silencer arranged between the structural cones has a smaller diameter than the outer openings of said cones and therefore it requires less length in comparison with the silencers arranged in extension of said outer openings in conventional fans.
  • The silencer arranged between the structural cones of the fan can further be determined with an extension onto one or both structural cones, whereby achieving an even greater soundproofing effect with the same fan longitudinal dimension.
  • The possibility of incorporating a complimentary silencer with respect to the outer opening of the air divergence cone of the fan is also provided, said silencer being formed by two concentric cylindrical bodies, assembled on the structural casing itself in that output part of the fan, whereby further increasing the soundproofing of the fan without increasing the longitudinal dimension thereof.
  • Therefore, said fan object of the invention has very advantageous constructive and functional features, acquiring its own identity and preferable character with respect to conventional fans of the same type.
    • Description of the Drawings
    • Figure 1 schematically shows a conventional type soundproofed helico centrifugal fan.
    • Figure 2 is a scheme of a soundproofed helico centrifugal fan according to the invention.
    • Figure 3 is an exploded perspective view of a practical embodiment of a soundproofed helico centrifugal fan according to the invention.
    • Figures 4, 5 and 6 schematically show a soundproofed helico centrifugal fan according to the invention, according to three enlarged embodiments of the silencer arranged between the air convergence cone and the air divergence cone of the fan.
    • Figure 7 is a scheme of a soundproofed helico centrifugal fan according to the invention, incorporating a complimentary silencer in the outlet part of the fan.
    • Figure 8 is an exploded perspective view of a practical embodiment of a soundproofed helico centrifugal fan like that of the preceding figure.
    Detailed Description of the Invention
  • The object of the invention relates to a helico centrifugal fan of the type comprising a tubular casing (1), inside which there is housed a structural assembly made up of an air convergence cone (2) and an air divergence cone (3), which determine an air passage duct, an air driving propeller (4) associated with a drive motor (5) being housed in the air divergence cone (3), all of this forming an assembly intended for being intercalated in an air duct, to which the ends of the tubular casing (1) are coupled.
  • Conventional fans of this type are complimented with silencers (6) arranged in extension of the ends, as observed in Figure 1, for preventing the operating noise from propagating through the application air duct, said silencers (6) necessarily having a length proportional to the diameter of the air duct in which the fan is arranged, which generally means that the has an excessive longitudinal dimension.
  • The helico centrifugal fan proposed according the invention is formed with the air convergence cone (2) and the air divergence cone (3) axially separated, including a silencer (7) between them arranged between the narrowest parts thereof, as observed in Figure 2.
  • The silencer (7) is thus included inside the fan assembly, in an area of smaller diameter than the coupling ends for being coupled to the application air duct, so said silencer (7) requires a much short length than the silencers (6) arranged in extension of the end of conventional helico centrifugal fans do.
  • In that arrangement, the soundproofing silencer (7) according to this solution of the invention, can be arranged such that it extends onto the air convergence cone (2) of the fan, as shown in Figure 4, or onto the air divergence cone (3), as shown in Figure 5, or onto both cones (2 and 3), as shown in Figure 6, a greater soundproofing effect with the same total length of the fan being achieved with these forms.
  • In addition, the possibility of incorporating a complimentary silencer (8) at the outlet of the fan assembled on the tubular casing (1) is provided, said complimentary silencer (8) comprising two concentric cylindrical bodies (8.1 and 8.2), which are in correspondence outside and inside the air passage, whereby increasing the soundproofing of the fan maintaining its structural longitudinal dimension.

Claims (4)

  1. A helico centrifugal fan formed by a structural assembly comprising an air convergence cone (2) and an air divergence cone (3) inside a tubular casing (1), between which cones there is an air passage duct, the air convergence cone (2) comprises a frustoconical body and the air divergence cone (3) comprises a frustoconical body,
    there being a propeller (4) in the air divergence cone (3) associated with a drive motor (5), characterized in that the air convergence cone (2) and the air divergence cone (3) are axially separated, there being a silencer (7) between them arranged between the narrowest parts thereof,
    the air passage duct being a constant diameter duct arranged between the narrowest part of the convergence cone (2) and the narrowest part of the divergence cone (3), this constant diameter duct having a diameter equal to the narrowest diameter of the frustoconical body of the air convergence cone (2) and of the frustoconical body of the air divergence cone (3).
  2. The helico centrifugal fan according to claim 1, characterized in that the silencer (7) extends onto the air convergence cone (2).
  3. The helico centrifugal fan according to claim 1, characterized in that the silencer (7) extends onto the air divergence cone (3).
  4. The helico centrifugal fan according to claim 1, characterized in that the silencer (7) extends onto the air convergence cone (2) and onto the air divergence cone (3).
EP12154849.9A 2011-02-28 2012-02-10 Helico centrifugal fan Active EP2492515B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL12154849T PL2492515T3 (en) 2011-02-28 2012-02-10 Helico centrifugal fan

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES201100220A ES2400098B1 (en) 2011-02-28 2011-02-28 HELICOCENTRIFUGO FAN

Publications (3)

Publication Number Publication Date
EP2492515A2 EP2492515A2 (en) 2012-08-29
EP2492515A3 EP2492515A3 (en) 2018-05-23
EP2492515B1 true EP2492515B1 (en) 2020-01-15

Family

ID=45571449

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12154849.9A Active EP2492515B1 (en) 2011-02-28 2012-02-10 Helico centrifugal fan

Country Status (5)

Country Link
EP (1) EP2492515B1 (en)
EA (1) EA026597B1 (en)
ES (2) ES2400098B1 (en)
PL (1) PL2492515T3 (en)
UA (1) UA110016C2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2394332B1 (en) * 2012-08-02 2013-09-12 Soler & Palau Res Sl VENTILATION BOX
ES2524648B1 (en) * 2013-06-06 2015-08-06 Soler & Palau Research, S.L. CONTROLLED MECHANICAL VENTILATION INSTALLATION
ES2829382B2 (en) * 2019-11-29 2022-03-30 Soler & Palau Res Sl IN-LINE HELICOCENTRIFUGAL FAN
DE202019107056U1 (en) 2019-12-17 2021-03-18 Systemair GmbH Soundproof fan arrangement

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7305759A (en) * 1973-04-25 1974-10-29
JPH02108898A (en) * 1988-10-17 1990-04-20 Hitachi Ltd Axial blower
EP0837245A2 (en) * 1996-10-15 1998-04-22 Air Handling Engineering Ltd. Fan for air handling system

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL17192C (en) * 1924-08-01
US3346174A (en) * 1966-07-05 1967-10-10 Trane Co Compact axial flow fan
US3403843A (en) * 1966-12-27 1968-10-01 Trane Co Bearing bracket
JPS5958800U (en) * 1982-10-12 1984-04-17 三菱電機株式会社 Axial fan with muffler
JPS6012700U (en) * 1983-07-06 1985-01-28 三菱電機株式会社 Blower silencer
US4692091A (en) * 1985-09-23 1987-09-08 Ritenour Paul E Low noise fan
RU2051295C1 (en) * 1993-02-24 1995-12-27 Товарищество с ограниченной ответственностью "Ритм" Direct flow fan
JP3547171B2 (en) * 1994-06-16 2004-07-28 日本無機株式会社 Inner cylinder and silencer
JP2000283098A (en) * 1999-03-26 2000-10-10 Ebara Corp Fan with muffling box
US6217281B1 (en) * 1999-06-30 2001-04-17 Industrial Technology Research Institute Low-noise fan-filter unit
EP1657451A1 (en) * 2004-11-12 2006-05-17 Hans Östberg A duct fan
ES2356873B1 (en) * 2009-07-29 2012-03-15 Soler & Palau Research S.L. FAN HELICOCENTR�? SOUND SOUND.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7305759A (en) * 1973-04-25 1974-10-29
JPH02108898A (en) * 1988-10-17 1990-04-20 Hitachi Ltd Axial blower
EP0837245A2 (en) * 1996-10-15 1998-04-22 Air Handling Engineering Ltd. Fan for air handling system

Also Published As

Publication number Publication date
UA110016C2 (en) 2015-11-10
ES2400098A2 (en) 2013-04-05
EA201200197A1 (en) 2012-09-28
ES2400098B1 (en) 2014-02-06
ES2400098R1 (en) 2013-07-01
EP2492515A3 (en) 2018-05-23
ES2784573T3 (en) 2020-09-28
EP2492515A2 (en) 2012-08-29
EA026597B1 (en) 2017-04-28
PL2492515T3 (en) 2020-07-27

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