EP0183655A2 - Ventilateur centrifuge et axial - Google Patents

Ventilateur centrifuge et axial Download PDF

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Publication number
EP0183655A2
EP0183655A2 EP85830277A EP85830277A EP0183655A2 EP 0183655 A2 EP0183655 A2 EP 0183655A2 EP 85830277 A EP85830277 A EP 85830277A EP 85830277 A EP85830277 A EP 85830277A EP 0183655 A2 EP0183655 A2 EP 0183655A2
Authority
EP
European Patent Office
Prior art keywords
rotation
rotor
axis
fact
fan apparatus
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.)
Granted
Application number
EP85830277A
Other languages
German (de)
English (en)
Other versions
EP0183655A3 (en
EP0183655B1 (fr
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 Srl
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 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.
  • electromechanical fan apparatus characterised by the fact that it includes a rotor constituted by a rectangular frame mounted for rotation about an axis parallel to two sides thereof, the sides of the frame parallel to the axis of rotation being constituted by fan blades having curved surfaces the concavity of which faces in the direction of movement and each side of the frame orthogonal to the axis of rotation being constituted by two oppositely inclined blades also having curved surfaces and a concavity facing in the direction of movement.
  • 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.
  • 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. This arrangement for rotary support of the lower end of the spindle 6 ensures that the rotor formed by the said rectangular frame 7 cannot, during operation, cause flexure of the spindle 6.
  • 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)
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
IT2378484 1984-11-28
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

Publications (3)

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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2344384A (en) * 1998-12-02 2000-06-07 Sunonwealth Electr Mach Ind Co Impeller for miniature fan
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 (5)

* 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

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2344384A (en) * 1998-12-02 2000-06-07 Sunonwealth Electr Mach Ind Co Impeller for miniature fan
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

Also Published As

Publication number Publication date
IT8423784A0 (it) 1984-11-28
IT1196343B (it) 1988-11-16
EP0183655A3 (en) 1987-09-02
DE3582654D1 (de) 1991-05-29
ATE62977T1 (de) 1991-05-15
EP0183655B1 (fr) 1991-04-24

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