EP1967740A2 - A manifold, in particular a scroll type manifold for fans for use in extractor hoods - Google Patents

A manifold, in particular a scroll type manifold for fans for use in extractor hoods Download PDF

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Publication number
EP1967740A2
EP1967740A2 EP08151374A EP08151374A EP1967740A2 EP 1967740 A2 EP1967740 A2 EP 1967740A2 EP 08151374 A EP08151374 A EP 08151374A EP 08151374 A EP08151374 A EP 08151374A EP 1967740 A2 EP1967740 A2 EP 1967740A2
Authority
EP
European Patent Office
Prior art keywords
shells
manifold
nozzle
manifold according
connection
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.)
Withdrawn
Application number
EP08151374A
Other languages
German (de)
English (en)
French (fr)
Inventor
Antonio Ranalli
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.)
LN 2 Srl a socio unico
Original Assignee
LN 2 Srl a socio unico
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 LN 2 Srl a socio unico filed Critical LN 2 Srl a socio unico
Publication of EP1967740A2 publication Critical patent/EP1967740A2/en
Withdrawn legal-status Critical Current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
    • F04D29/40—Casings; Connections of working fluid
    • 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
    • F04D29/424—Double entry casings

Definitions

  • the present invention relates to a scroll type manifold, particularly for fans for use in extractor hoods, having the features set out in the preamble of main claim 1.
  • the invention is used particularly, though not exclusively, in the construction of ventilation units for hoods for extracting air-like gases.
  • the manifold which defines the volute of the fan is typically constructed in two separate portions, otherwise referred to using the term "half-shells" or “semi-cochlea” in the relevant sector.
  • the half-shells are provided so as to be connected to each other with removable connection means, typically constructed as screw type fixing means, once the impeller and optionally the control motor thereof has/have been accommodated inside the manifold.
  • a delivery cross-section which is directed tangentially relative to the volute and one or more open intake cross-sections in the manifold coaxially relative to the axis of rotation of the impeller.
  • connection means for example, of the screw type or the like, in order to join the half-shells to each other is not found to be particularly convenient and rapid for the fitter.
  • a main object of the invention is to overcome those limitations by means of a manifold which is structurally and functionally configured in order to make it quicker and easier to connect the manifold half-shells and which is at the same time capable of ensuring reliable and correct connection thereof.
  • a fan is generally designated 1 and comprises a scroll type manifold 2 which is provided so as to constitute a housing of a radial impeller 3 of the fan, which is operated by a motor 4 about an axis of rotation designated X.
  • a delivery cross-section 5 in which the delivery flow direction which is indicated by the axis Y in the Figures is perpendicular to the axis of rotation X and a main intake cross-section 6 which includes a lateral opening 7 which is formed in the manifold, the opening 7 being coaxial with the axis X of the impeller.
  • the delivery cross-section 5 and intake cross-section 6 are of circular shape as illustrated in the Figures.
  • the manifold 2 further comprises a first half-shell and a second half-shell which are designated 8 and 9, respectively, and which can be connected to each other at a connection profile P by removable connection means which are described in detail below.
  • the half-shells 8, 9 together define the volute of the fan in which the impeller is caused to rotate.
  • first half-shell 8 of the manifold there is formed in the first half-shell 8 of the manifold the main intake opening 7, in a coaxial position relative to the axis X of the impeller.
  • first half-shell there is further integrally formed a cylindrical nozzle 10, which has a cross-section having a closed circular contour and which defines the cross-section 5 for the discharge of the delivery flow generated by the fan.
  • the nozzle 10 comprises a cylindrical collar 10a which is developed, over at least a portion, in the axial direction Y of the delivery flow and which is provided so as to be connected to a corresponding cross-section (not illustrated) for conveying and discharging the flow drawn in, for example, defined in an extractor hood structure.
  • the nozzle 10 is provided with means for removable connection to a portion of the stationary structure of the hood.
  • the second half-shell 9 is provided in order to rotatably support thereon both the impeller 3 and the motor unit 4 for operating it.
  • a preferred configuration provides for the motor 4 to be supported in a projecting manner on the half-shell 9, inside the manifold, by means of a support flange 11 which is provided laterally in the half-shell 9, at the side axially opposite the intake opening 7 of the other half-shell 8.
  • the impeller 3 is mounted coaxially with respect to the motor 4 and is also supported in a projecting manner on the manifold half-shell 9.
  • connection profile P is intended to refer to that portion of the above-mentioned line on which the half-shells are caused to meet each other with mutual connection.
  • the removable connection means of the half-shells 8, 9 comprise first connection means of the form-fit type between the half-shells, which are generally designated 15 and which are provided at the nozzle 10, in the delivery cross-section 5 of the fan.
  • the means 15 comprise an extension piece 16 which extends from the second half-shell 9 near the delivery cross-section of the manifold, which is formed as part of an axial portion 16a having a cylindrical wall.
  • the surface profile of that wall is selected so as to have such dimensions as to engage, with the outer wall surface thereof, with at least part of the internal surface of the cylindrical nozzle 10, with a substantial form-fit connection between the surfaces in mutual contact, as clearly illustrated in Figure 8 .
  • the extension piece 16 is constructed so as to be integral with the half-shell 9 and has such a profile and dimensions as to constitute a guide means for the nozzle 10 in the delivery direction (axis Y) during the mutual connection of the manifold half-shells, so that the form-fit connection between the extension piece 16 and the nozzle 10 allows mutual retention of the half-shells, at least in the transverse direction relative to the axis Y in the region of the nozzle 10.
  • the first connection means 15 are configured so as to cooperate with other second removable form-fit connection means which are generally designated 20 and which are provided between the half-shells 8, 9.
  • connection means 20 comprise, along portions of the connection profile P, a plurality of reliefs which are all designated 21 and which are provided on the first half-shell 8, and a corresponding plurality of grooves which are all designated 22 and which are formed on the second half-shell 9, each relief being able to engage with a respective groove, which is formed in a corresponding position facing the said relief, in order to bring about a substantial form-fit connection between reliefs and grooves in mutual engagement, in a connection direction which is directed parallel with the axis X (therefore, transversely relative to the delivery flow direction).
  • the reliefs 21 project from the half-shell 9 in the same direction along at least a portion of the connection profile P.
  • a first pair of reliefs designated 21' and 21" for convenience in Figure 7 , which extend from the delivery cross-section 5, respectively, at diametrically opposed sides of the nozzle 10 along the profile P.
  • Other reliefs 21, spaced apart from each other, are provided along the remaining portion of the connection profile P, as illustrated in Figure 7 .
  • the grooves 22 are developed on the other half-shell 8 in the same direction, in a position which correspondingly faces the respective reliefs 21, when the half-shells are coaxially arranged relative to the axis X, and have such a longitudinal dimension as to receive, with form-fit connection, the corresponding reliefs 21.
  • the reliefs 21 are engaged with slight pressure in the respective grooves for mutual connection, so as to bring about a retention action between the half-shells not only in a direction transverse to the axis X but also in the same axial direction X for relative connection.
  • the removable connection means between the half-shells further comprise snap-fit connection means which are generally designated 25 and which are intended to cooperate with the form-fit connection means 15 and 20 so as to ensure adequate mutual securing between the half-shells 8, 9.
  • connection means 25 comprise a pair of seats 26 on the first half-shell 8, each one being able to be engaged in a snap-fit manner with a respective tooth 27 of a pair of teeth which are formed on the half-shell 9 in a corresponding position.
  • the seats 26 are provided at the connection profile P, at the axially opposite side (in the direction Y) with respect to the nozzle 6.
  • each seat 26 comprises a through-hole 26a which is intended to be engaged with the corresponding tooth 27 in a hook-like manner, before resilient deformation of the tooth (in the engagement phase of the seat) and the subsequent resilient return thereof into the non-deformed position, with a surface 27a of the tooth in abutment against the seat 26 so as to ensure the relative retention of the tooth in the seat, at least in the opposite direction to that for mutual insertion (directed parallel with the axial direction X).
  • the removable connection means between the half-shells 8, 9 further comprise other form-fit connection means which are generally designated 30 and which include a pair of protrusions 31 which are provided on the second half-shell 9 and a respective pair of openings 32 which are formed in the first half-shell 8 in a position which correspondingly faces the protrusions (with the half-shells arranged coaxially relative to the axis X).
  • Each protrusion 31 is intended to engage, substantially with a form-fit connection, with the corresponding opening 32, the respective formations of the protrusion and the opening being selected in such a manner that an embedded type connection is brought about between the mutually engaged portions, as described in detail below.
  • a pair of protrusions 31 which extend in the same direction from the half-shell 9, each located along the profile P, behind a corresponding and separate relief 21 (the reliefs provided behind the nozzle 10), with such an arrangement that the protrusions are arranged at opposite sides with respect to a theoretical median plane which extends through the axis X and which is parallel with the delivery direction Y.
  • the pair of openings 32 is formed in the half-shell 8, those openings preferably being formed so as to be through-holes and being able to be engaged with the corresponding reliefs 21 in a relative engagement direction which is directed parallel with the axis X.
  • each protrusion 31 has a body 31a of tapered shape with a pair of opposite sides 31b, 31c which project from the half-shell 9 and which converge in the direction of an end 31d of the body 31a, that formation being clearly illustrated in Figure 7 .
  • the through-holes 32 are formed as slots having elongate form, whose opposite sides 32a, 32b converge towards an end 32c of the slot, the tapered portions of the protrusion and the slot being selected in order to construct a substantial form-fit connection of the protrusion in the slot, in particular along the corresponding sides.
  • each protrusion is capable of a sort of wedging action in the slot, in the direction of the tapered end, so as to bring about mutual retention with substantial relative embedding between the connected portions.
  • the seats 35 are formed as through-holes through the cylindrical collar of the delivery nozzle.
  • connection means 15, 20, 25, 30, and optionally 35, 36 in practice allows a stable connection to be produced between the half-shells 8, 9, the connection being particularly rapid and reliable in comparison with the securing means of conventional type.
  • connection system described does not require either any additional fixing means separate from the half-shells, such as those which provide for screw type connections, or any equipment for carrying out the connection.
  • connection means 25 in order to disconnect the half-shells, for example, for maintenance operations or to replace parts of the fan, it is necessary to use suitable tools, in particular for disengaging the connection means 25.
  • the invention thereby achieves the objects set out and provides the advantages set out above over known solutions.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Duct Arrangements (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP08151374A 2007-03-06 2008-02-13 A manifold, in particular a scroll type manifold for fans for use in extractor hoods Withdrawn EP1967740A2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000076A ITPD20070076A1 (it) 2007-03-06 2007-03-06 Collettore, in particolare collettore a chiocciola per ventilatori da impiegarsi in cappe aspiranti

Publications (1)

Publication Number Publication Date
EP1967740A2 true EP1967740A2 (en) 2008-09-10

Family

ID=39512726

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08151374A Withdrawn EP1967740A2 (en) 2007-03-06 2008-02-13 A manifold, in particular a scroll type manifold for fans for use in extractor hoods

Country Status (3)

Country Link
EP (1) EP1967740A2 (ru)
IT (1) ITPD20070076A1 (ru)
RU (1) RU2454573C2 (ru)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102650445A (zh) * 2011-02-28 2012-08-29 博西华电器（江苏）有限公司 一种抽油烟机
IT201700001196A1 (it) * 2017-01-05 2018-07-05 Saba Plast Srl Gruppo aspiratore con deflessione di flusso
IT201700018600A1 (it) * 2017-02-20 2018-08-20 Elica Spa Convogliatore radiale per cappe aspiranti

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1022028B1 (nl) * 2013-04-05 2016-02-04 Atlas Copco Airpower, Naamloze Vennootschap Behuizing voor een ventilator van een spiraalcompressor
CN105593534B (zh) 2013-09-26 2019-08-23 阿尔弗雷德·卡赫欧洲两合公司 具有声音反射装置的抽吸设备

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2205950A5 (ru) * 1972-11-08 1974-05-31 Grenoble Toleries
DE3702765A1 (de) * 1987-01-30 1988-08-11 Kessler & Luch Gmbh Oelnebelabscheider
RU2184276C1 (ru) * 2000-10-12 2002-06-27 Гончаров Александр Викторович Способ сборки кожуха радиального вентилятора
JP2005274026A (ja) * 2004-03-25 2005-10-06 Sanyo Electric Co Ltd 換気扇

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102650445A (zh) * 2011-02-28 2012-08-29 博西华电器（江苏）有限公司 一种抽油烟机
CN102650445B (zh) * 2011-02-28 2016-06-15 博西华电器（江苏）有限公司 一种抽油烟机
IT201700001196A1 (it) * 2017-01-05 2018-07-05 Saba Plast Srl Gruppo aspiratore con deflessione di flusso
IT201700018600A1 (it) * 2017-02-20 2018-08-20 Elica Spa Convogliatore radiale per cappe aspiranti
EP3364037A3 (en) * 2017-02-20 2018-11-07 ELICA S.p.A. Radial blower for suction hoods

Also Published As

Publication number Publication date
RU2008108717A (ru) 2009-09-10
RU2454573C2 (ru) 2012-06-27
ITPD20070076A1 (it) 2008-09-07

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