EP0598684B1 - Electric fan - Google Patents

Electric fan Download PDF

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Publication number
EP0598684B1
EP0598684B1 EP93830415A EP93830415A EP0598684B1 EP 0598684 B1 EP0598684 B1 EP 0598684B1 EP 93830415 A EP93830415 A EP 93830415A EP 93830415 A EP93830415 A EP 93830415A EP 0598684 B1 EP0598684 B1 EP 0598684B1
Authority
EP
European Patent Office
Prior art keywords
grilled
cover
impeller
basin
lip
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
EP93830415A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0598684A1 (en
Inventor
Alberto Bacchiocchi
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.)
Fime - Fabbrica Italiana Motori Elettrici - Srl
Original Assignee
Fime - Fabbrica Italiana Motori Elettrici - 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 Fime - Fabbrica Italiana Motori Elettrici - Srl filed Critical Fime - Fabbrica Italiana Motori Elettrici - Srl
Publication of EP0598684A1 publication Critical patent/EP0598684A1/en
Application granted granted Critical
Publication of EP0598684B1 publication Critical patent/EP0598684B1/en
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
    • 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
    • F04D25/12—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation the unit being adapted for mounting in apertures
    • 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
    • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
    • 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
    • F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
    • F04D29/701—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps
    • F04D29/703—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps specially for fans, e.g. fan guards

Definitions

  • the present invention concerns an electric fan for cooker hoods, which has a grille with a new shape, which permits an increase in the capacity of the air intake of the fan, on the one hand and a considerable reduction of the manufacturing costs of the impeller on the other.
  • the electric fans currently being produced and used are made up of an impeller set on the shaft of an eletric motor, the stator group of which is fixed inside a support flange positioned at the centre of a round, almost flat, grilled cover, which plugs up the entry hole of the scroll in which the eletric fan is housed.
  • the suction fan resembles the impeller of a Francis-turbine, of the slow type and is obtained by welding to pre-moulded parts in plastic material: one comprising a toroidal bladed nozzle, the other a circular cap on which there is the hub of the impeller.
  • Patent FR-A-2 580 340 describes another type of electric fan, which is easier and less expensive to manufacture thanks to the use of a monolithic impeller consisting of a circular cap having a series of radial blades and a central hub into which the shaft of the electric motor is to be flange-mounted.
  • This type of electric fan consists of a grilled cover having a central platform that supports the electric motor and a perimeter annular lip whose shape conforms to that of the bottom lip of the impeller blades.
  • An aim of the instant invention is to increase, while maintaining the same overall transversal dimensions, the section for the passage of the air intake through the aforementioned grilled cover.
  • This aim is achieved by the features of claim 1. ln fact, the useful intake section in current electric fans is much smaller when compared to the surface area of the grilled cover, both because of the space occupied by the concentric rings and the radii of the grid, but above all, because of the presence of the large central plate, within which the electric motor is flange- mounted.
  • the grilled cover of the electric fan has been provided with a basin shape, in such a way as to use as a useful section for the passage of the air intake, both the usual area surrounding the central plate of the motor flange mounting, and a supplementary area coinciding with the surface of the lateral grilled side of the basin.
  • the eletric fan in question comprises a suction fan or impeller (1), obtained from moulding in one single piece of plastic material, which is made up of a circular cap (1a) equipped with an annular series of radial curved blades (1b).
  • the originality of said cover (3) lies in its basin shape with the edge curved downwards in an upside-down "U” shape, so as to create at the lower part of the cover, an annular channel (4) which runs all around the truncated cone wall which delimits the depressed housing of the basin.
  • said cover (3) obtained in one single piece of moulded plastic material, comprises a rectangular platform (3a), where the electric motors is to be flange-mounted, this platform being at the centre of the bottom grilled wall (3b) of the basin, from which wall there projects perimetrally a truncated-cone side (3c), also grilled, which ends at the top in a large external annular lip (3d), which continues and connects with a second descending side (3e), which ends at the bottom in an external flange (3f), along which there are holes (3g) for the fixing screws of the cover (3) to the frame of the cooker hood.
  • the increase of the useful air intake section brings about not only an increase in the capacity of the air generated by the group, but also, a more efficient cooling of the electric motor, with the consequent possibility of using more compact and more economical motors.
  • lip (3d) of cover (3) forms the delimiting bottom edge of the series of radial channels of impeller (1) delimited laterally by two consecutive blades (1b) and at the top by cap (1a).
  • this annular series of radial ducts is reproduced following the approach of the shaped lip (3d) of the cover (3) to the lower similarly shaped edge (1b), of the blades of the impeller (1); being provided that said approach is determined automatically each time that the shaft (2) of the electric motor is inserted into the hub of the impeller (1), until it stops by means of a ring (5) inserted on the shaft (2).
  • the number 6 indicates a ring made of a deadening material which can, on request, be built in to the bottom of the annular channel (4), in order to reduce noise due to the current of air taken in through the grilled cover.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP93830415A 1992-10-16 1993-10-14 Electric fan Expired - Lifetime EP0598684B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMC920052 1992-10-16
ITMC920052A IT1270391B (it) 1992-10-16 1992-10-16 Elettroventilatore per cappe da cucina utilizzante una girante monolitica ed un coperchio grigliato a catino

Publications (2)

Publication Number Publication Date
EP0598684A1 EP0598684A1 (en) 1994-05-25
EP0598684B1 true EP0598684B1 (en) 1996-12-27

Family

ID=11356640

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93830415A Expired - Lifetime EP0598684B1 (en) 1992-10-16 1993-10-14 Electric fan

Country Status (3)

Country Link
EP (1) EP0598684B1 (it)
DE (1) DE69306920D1 (it)
IT (1) IT1270391B (it)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2310253A (en) * 1996-02-17 1997-08-20 Xpelair Ltd Ventilation fan
IT1294180B1 (it) * 1997-09-03 1999-03-22 Lucio Befera Dispositivo per il supporto dell'organo motore di ventilatori e simili
IT250946Y1 (it) * 2000-01-28 2003-10-22 Elektromec S P A Gruppo ventilante integrato per cappe da cucina
DE10162919A1 (de) * 2001-12-20 2003-07-03 Bsh Bosch Siemens Hausgeraete Lüftervorrichtung
KR102231096B1 (ko) 2014-06-09 2021-03-23 삼성전자주식회사 공기청정기
EP3037672B1 (en) * 2014-12-22 2019-09-11 Whirlpool EMEA S.p.A Adapter in a suction device for a hood

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1085565A (en) * 1963-06-27 1967-10-04 Colchester Woods Mixed flow fans
GB1328082A (en) * 1970-08-24 1973-08-30 Airscrew Weyroc Ltd Fans
FR2580340B1 (fr) * 1985-04-12 1989-07-13 Etri Sa Ventilateur centrifuge

Also Published As

Publication number Publication date
DE69306920D1 (de) 1997-02-06
ITMC920052A0 (it) 1992-10-16
IT1270391B (it) 1997-05-05
ITMC920052A1 (it) 1994-04-16
EP0598684A1 (en) 1994-05-25

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