EP0183655B1 - Ventilateur centrifuge et axial - Google Patents

Ventilateur centrifuge et axial Download PDF

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Publication number
EP0183655B1
EP0183655B1 EP85830277A EP85830277A EP0183655B1 EP 0183655 B1 EP0183655 B1 EP 0183655B1 EP 85830277 A EP85830277 A EP 85830277A EP 85830277 A EP85830277 A EP 85830277A EP 0183655 B1 EP0183655 B1 EP 0183655B1
Authority
EP
European Patent Office
Prior art keywords
axis
blades
rotor
rotation
frame
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
EP85830277A
Other languages
German (de)
English (en)
Other versions
EP0183655A2 (fr
EP0183655A3 (en
Inventor
Paolo Campolmi
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.)
IMPRESIND S.R.L.
Original Assignee
IMPRESIND Srl
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 IMPRESIND Srl filed Critical IMPRESIND Srl
Priority to AT85830277T priority Critical patent/ATE62977T1/de
Publication of EP0183655A2 publication Critical patent/EP0183655A2/fr
Publication of EP0183655A3 publication Critical patent/EP0183655A3/en
Application granted granted Critical
Publication of EP0183655B1 publication Critical patent/EP0183655B1/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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation

Definitions

  • the present invention relates generally to electromechanical fan apparatus and particularly to a composite axial and centrifugal fan operable to provide a new type of ventilation.
  • the US-A-2 333 673 patent discloses an electromechanical fan having stantially the features of the first part of the main claim, and substantially designed for low ventilating airflow ventilation.
  • the present invention seeks to overcome the above discussed disadvantage by providing electromechanical fan apparatus which is able to operate both as a double axial fan generating two oppositely directed air streams, and as a centrifugal fan generating a radially directed air stream, and which moreover,is adapted to provide an increased horizontal movement of air and an improved efficiency.
  • an electromechanical fan having the features of the characterizing part of the main claim.
  • a particular feature of this aspect of the present invention is that it provides electromechanical fan apparatus which is able to put into effect a new method of ventilation which will be described in more detail below.
  • Another feature of the present invention is that it provides electromechanical fan apparatus which is structurally simple and of great reliability.
  • the present invention also comprehends a method of circulating air within a closed environment, such as the interior of a building, which comprises the contemporaneous aspiration of two oppositely directed air streams from opposite sides of the apparatus and parallel to the axis of rotation of the rotor thereof in such a way as to cause mixing of the two opposite incoming air streams which may have different physical characteristics (temperature, humidity, pressure), and the subsequent radial expulsion of the air streams after having been mixed,
  • Figure 1 is a perspective view of electromechanical fan apparatus formed as an embodiment of the invention
  • Figure 2 is an enlarged fragmentary perspective view of a portion of the frame constituting the rotor of the fan apparatus of Figure 1
  • Figure 3 is an enlarged fragmentary perspective view of a portion of the frame shown in Figure 2
  • Figure 4 is an enlarged fragmentary perspective view of the central portion of the upper part of the frame illustrated in Figures 2 and 3 which is rigidly connected to a drive motor shaft
  • Figure 5 is a view on a reduced scale illustrating the relative positions of the portions shown in Figures from 2 to 4.
  • the electromechanical fan apparatus in question comprises a structure constituted by two main annular support elements 1 and 2 lying in parallel planes and interconnected by means of a plurality of spacer rods 3 positioned around the perimeter of the annular support elements 2 and lying orthogonally with respect to the plane of the annular elements 2.
  • a generally pyramid-shape motor support frame formed by four upwardly converging struts 4 which are joined at the top by a flat plate for support of an electric motor 5
  • the motor shaft carries a drive spindle 6 on which there is fixed a rectangular frame generally indicated 7.
  • the lower end of the spindle 6 is housed in a bearing held in place by a plurality of radial arms 8 extending inwardly from the lower annular support element 2.
  • the rectangular frame 7 constituting the rotor has two sides 9 parallel to the axis of rotation formed by blades having preferably cylindrical surfaces the concavity of which may face in the direction of rotation or opposite this latter.
  • the other two sides of the rectangular frame, orthogonal to the axis of rotation are, in turn, each constituted by two inclined blades 10 and 10' also having preferably cylindrical surfaces the concavity of which faces in the direction of rotation.
  • the blades parallel to the axis of rotation are connected to the blades orthogonal to the axis of rotation by means of corner portions 11 whilst the lower annular support element 2 carries a grid or grille 12 of circumferential grid bars.
  • the fan apparatus thus formed contemporaneously produces two positively driven converging axial air streams flowing into the fan and an outward radial air stream, which differs from the air flow pattern of a conventional centrifugal fan which causes a positively driven radial air stream and, as a secondary action, a displacement of air in the direction of the axis of rotation by virtue of the pressure differential caused by the radial air flow.
  • the fan apparatus of the present invention it is possible to recirculate enormous volumes of air in a very short time because the displacement of air parallel to the axis of rotation, produced by the two pairs of radial blades, is very much greater than that produced by the induction action of a traditional centrifugal fan.
  • the fan apparatus of the present invention thus acts to create three positively displaced, or primary, air streams, two of which are parallel to the axis of the fan, but oppositely directed with respect to one another, each axial air stream moving towards the fan, and a radial air stream moving outwardly away from the fan.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Motor Or Generator Cooling System (AREA)

Claims (3)

  1. Appareil ventilateur électromécanique comprenant un rotor (9, 10, 11) accouplé pivotant au moyen d'un fuseau (6) à l'arbre d'un moteur électrique de commande, ledit rotor comprenant un cadre assemblé dans une cage circulaire de support pour pivoter autour d'un axe parallèle à ses deux côtés, ledit cadre comprenant deux aubes rectilignes (9) qui sont parallèles à l'axe de rotation du rotor et deux aubes rectilignes ultérieures, intégrales dans le sens contraire (10, 10'), orthogonales à l'axe de rotation dudit rotor, lesdites deux aubes ultérieures s'étendant essentiellement le long d'un périmètre complet de ladite cage circulaire, caractérisé en ce que lesdites aubes (9) présentent sections transversales courbées dont la concavité se trouve en face de la direction de mouvement dudit cadre, et en ce que lesdites deux aubes (10, 10') ultérieures présentent elles-aussi une section transversale courbée et une concavité se trouvant en face du sens de mouvement dudit cadre.
  2. Appareil ventilateur selon la revendication 1, où ladite cage circulaire de support comprend deux éléments (1, 2) supérieur et inférieur, annulaires, se trouvant sur plans parallèles, lesdits deux éléments annulaires étant assemblés l'un l'autre au moyen de barres (3) de raccord fixées espacées l'une l'autre autour desdits éléments annulaires (2) et s'étendant orthogonalement par rapport auxdits éléments (2), caractérisé en ce que ladite cage circulaire porte aussi un cadre comprenant chevrons (4) convergeants en haut et formant une pyramide tronconique dans le but de supporter ledit moteur électrique (5), et en ce que ledit fuseau (6) est supporté sur son extrémité loin dudit moteur (5) par un palier tenu rigidement en position au moyen de bras radials (8) s'étendant à l'intérieur d'un desdits éléments (2) de support annulaires.
  3. Appareil ventilateur selon les revendications précédentes, caractérisé en ce que les aubes (9) dudit rotor (9, 10, 11) parallèles à l'axe de rotation, sont assemblées avec lesdites aubes ultérieures (10, 10') orthogonales audit axe au moyen de portions angulaires (11).
EP85830277A 1984-11-28 1985-11-04 Ventilateur centrifuge et axial Expired - Lifetime EP0183655B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85830277T ATE62977T1 (de) 1984-11-28 1985-11-04 Axial- und zentrifugalluefter.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT8423784A IT1196343B (it) 1984-11-28 1984-11-28 Apparecchio elettromeccanico,con funzioni congiunte di ventilatore doppio assiale e di ventilatore centrifugo,atto a realizzare un tipo di ventilazione,e metodo funzionale relativo
IT2378484 1984-11-28

Publications (3)

Publication Number Publication Date
EP0183655A2 EP0183655A2 (fr) 1986-06-04
EP0183655A3 EP0183655A3 (en) 1987-09-02
EP0183655B1 true EP0183655B1 (fr) 1991-04-24

Family

ID=11209965

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85830277A Expired - Lifetime EP0183655B1 (fr) 1984-11-28 1985-11-04 Ventilateur centrifuge et axial

Country Status (4)

Country Link
EP (1) EP0183655B1 (fr)
AT (1) ATE62977T1 (fr)
DE (1) DE3582654D1 (fr)
IT (1) IT1196343B (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2344384B (en) * 1998-12-02 2003-02-26 Sunonwealth Electr Mach Ind Co Fan wheel structures
GB2374119A (en) * 2001-03-30 2002-10-09 Sunonwealth Electr Mach Ind Co Blower-type fan with dual inlets and a rotor for inducing axial and centrifugal flow

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1568946A (en) * 1925-01-07 1926-01-05 Abraham Bebel Electric-fan blade
US2104233A (en) * 1936-07-30 1938-01-04 William H Leinweber Blower
US2333673A (en) * 1942-04-17 1943-11-09 Poff Cecil Fan
AT315427B (de) * 1971-01-08 1974-05-27 Dl Veb Kom Luft Und Kaeltetech Gerät zum Belüften von Gebäuderäumen
DE2456521A1 (de) * 1974-11-29 1976-08-12 Opel Adam Ag Vorrichtung zum mischen von zwei gasoder luftstroemen unterschiedlicher temperatur und/oder zusammensetzung, insbesondere zum mischen eines kalt- und warmluftstromes bei einer kraftfahrzeugheizung
SU1134798A1 (ru) * 1982-06-11 1985-01-15 Кировский сельскохозяйственный институт Вентил тор

Also Published As

Publication number Publication date
EP0183655A2 (fr) 1986-06-04
IT1196343B (it) 1988-11-16
IT8423784A0 (it) 1984-11-28
EP0183655A3 (en) 1987-09-02
DE3582654D1 (de) 1991-05-29
ATE62977T1 (de) 1991-05-15

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