EP2792885B1 - Fan assembly comprising a case for the impeller - Google Patents

Fan assembly comprising a case for the impeller Download PDF

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Publication number
EP2792885B1
EP2792885B1 EP14162817.2A EP14162817A EP2792885B1 EP 2792885 B1 EP2792885 B1 EP 2792885B1 EP 14162817 A EP14162817 A EP 14162817A EP 2792885 B1 EP2792885 B1 EP 2792885B1
Authority
EP
European Patent Office
Prior art keywords
cover
impeller
air
flange
case
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
EP14162817.2A
Other languages
German (de)
French (fr)
Other versions
EP2792885A1 (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 PL14162817T priority Critical patent/PL2792885T3/en
Publication of EP2792885A1 publication Critical patent/EP2792885A1/en
Application granted granted Critical
Publication of EP2792885B1 publication Critical patent/EP2792885B1/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
    • 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
    • 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
    • F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
    • F04D25/0613—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump the electric motor being of the inside-out type, i.e. the rotor is arranged radially outside a central stator
    • 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
    • F04D29/08—Sealings
    • F04D29/16—Sealings between pressure and suction sides
    • F04D29/161—Sealings between pressure and suction sides especially adapted for elastic fluid pumps
    • F04D29/162—Sealings between pressure and suction sides especially adapted for elastic fluid pumps of a centrifugal flow wheel
    • 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
    • F04D29/444—Bladed diffusers
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2250/00—Geometry
    • F05D2250/50—Inlet or outlet
    • F05D2250/52—Outlet

Definitions

  • the present invention relates to fans that are used to prevent the overheating of electronic apparatus such as computers or similar applications, proposing a case for said fans developed with structural features that improve air circulation, and therefore the effectiveness of the heat removal provided by fans.
  • Electronic apparatus such as computers, for example, generate heat when they are operating which heat must be removed in order to prevent the functional components from deteriorating or from experiencing a service life reduction.
  • Heat removal systems normally consisting of air circulation impeller fans, arranged in the electronic apparatus themselves, are incorporated to remove the heat in the electronic apparatus in order to force outside air to enter the inside of the apparatus and expel the hot air from the inside thereof.
  • a fan assembly according to appended independent claim 1.
  • the fan assembly includes a fan case with structural features that favor the entrance and exit of air, thus improving conditions for air circulation through the impulsion of the fan housed therein.
  • This fan case object of the invention comprises a circular body with the lateral contour open between longitudinal bars having an aerodynamic section oriented with a lateral inclination with respect to the radial plane, there being arranged a cover in the front part of the body defining a grating with concentric circular ribs having a flared shape varying from those closest to the center to those on the periphery, said cover determining in the peripheral contour an arched flange facing an opposing arched flange defined by the bottom of the circular body, between which flanges there is defined a mouth in relation to the opening of the lateral contour of said circular body, the walls of said mouth being a prolongation of those of a peripheral opening defined by the impeller of the fan housed in the case.
  • a fan case is thus provided in which the grating defined by the front cover presents minimum resistance to the entrance of air through the absorption produced by the fan from the inside, whereas the mouth defined in relation to the opening of the circular contour favors the exit of air impelled by the fan, virtually without any head loss, the laterally inclined aerodynamic bars of the opening of the contour of the circular body also contributing to facilitate the exit of air.
  • the front cover of the case furthermore forms, in relation to the rotor of the fan, a labyrinth plug-in coupling, leaving the rotor of the fan to rotate freely, but complicating the passage of air, which also prevents head losses through said coupling, in turn favoring the output of air circulation through the case by the action of the fan.
  • the proposed case has very advantageous features for small fans arranged in electronic apparatus or similar applications, acquiring its own identity and preferred character with respect to conventional fans of those applications.
  • the object of the invention relates to a fan assembly, which includes a fan case, and particularly one that can be incorporated in electronic apparatus or similar applications, with a structural embodiment that advantageously favors the passage of air for the venting function, comprising a body (1), inside which there is housed an air impeller (2), associated with a rotary motor (3), whereas the front part of the case is closed with a cover (4) in the form of a grating.
  • the body (1) of the case is circular-shaped and has an opening (5) along its lateral contour for the passage of air, which opening (5) is defined between longitudinal bars (6) having an aerodynamically-shaped section oriented with a lateral inclination with respect to the radial plane, the number of said bars (6) being able to vary from a large number of bars (6) with free, narrow, intermediate spaces between them, like in the embodiment of Figures 1 , 3 and 4 , to a more or less reduced number of bars (6) with free, wide, intermediate spaces between them, like in the embodiments of Figures 5 and 6 .
  • the cover (4) of the front part of the case in turn defines a grating with concentric circular ribs (7), which have a flared shape varying from the ribs (7) closest to the center to those on the periphery, as can be seen in Figure 3 .
  • the cover (4) furthermore determines in the peripheral contour an arched flange (8), which in the mounted arrangement of said cover (4) faces an arched flange (9) arched in an opposing manner defined by the bottom of the circular body (1) of the case, such that between said flanges (8 and 9) there is defined a mouth which widens outwardly in relation to the opening (5) of the lateral contour of said circular body (1) of the case, the walls of said mouth being defined by the mentioned flanges (8 and 9), as a prolongation of the walls (10) of an opening (11) defined by the impeller (2) of the fan in the periphery thereof.
  • the entrance of the air is favored by the varying flared configuration of the ribs (7) forming the grating of the cover (4), whereas the mouth defined by the flanges (8 and 9) favors the exit of air through the opening (5) of the lateral contour of the body (1) of the case, the aerodynamic configuration and the orientation of the bars (6) of said opening (5) of the lateral contour of the body (1) also helping to facilitate such exit of air.
  • cover (4) forms with respect to the impeller (2) of the fan housed inside the case a labyrinth coupling (12), as seen in Figure 2 , which determines difficulties for the air exhaust passage between the mentioned cover (4) and the impeller (2), in turn preventing head losses through said coupling, but without complicating the functional rotation of the impeller (2), which is left to completely rotate freely.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Description

    Field of the Art
  • The present invention relates to fans that are used to prevent the overheating of electronic apparatus such as computers or similar applications, proposing a case for said fans developed with structural features that improve air circulation, and therefore the effectiveness of the heat removal provided by fans.
    • State of the Art
  • Electronic apparatus, such as computers, for example, generate heat when they are operating which heat must be removed in order to prevent the functional components from deteriorating or from experiencing a service life reduction.
  • Heat removal systems normally consisting of air circulation impeller fans, arranged in the electronic apparatus themselves, are incorporated to remove the heat in the electronic apparatus in order to force outside air to enter the inside of the apparatus and expel the hot air from the inside thereof.
  • However, the little space that is generally available in electronic apparatus means that heat removal fans arranged therein are very small, so for efficient heat removal said fans have to have certain features that maximally optimize air circulation movement.
  • US 2010/329857 discloses a fan assembly according to the pre-amble of appended independent claim 1.
    • Object of the Invention
  • In accordance with the present invention, there is provided a fan assembly according to appended independent claim 1. The fan assembly includes a fan case with structural features that favor the entrance and exit of air, thus improving conditions for air circulation through the impulsion of the fan housed therein.
  • This fan case object of the invention comprises a circular body with the lateral contour open between longitudinal bars having an aerodynamic section oriented with a lateral inclination with respect to the radial plane, there being arranged a cover in the front part of the body defining a grating with concentric circular ribs having a flared shape varying from those closest to the center to those on the periphery, said cover determining in the peripheral contour an arched flange facing an opposing arched flange defined by the bottom of the circular body, between which flanges there is defined a mouth in relation to the opening of the lateral contour of said circular body, the walls of said mouth being a prolongation of those of a peripheral opening defined by the impeller of the fan housed in the case.
  • A fan case is thus provided in which the grating defined by the front cover presents minimum resistance to the entrance of air through the absorption produced by the fan from the inside, whereas the mouth defined in relation to the opening of the circular contour favors the exit of air impelled by the fan, virtually without any head loss, the laterally inclined aerodynamic bars of the opening of the contour of the circular body also contributing to facilitate the exit of air.
  • The front cover of the case furthermore forms, in relation to the rotor of the fan, a labyrinth plug-in coupling, leaving the rotor of the fan to rotate freely, but complicating the passage of air, which also prevents head losses through said coupling, in turn favoring the output of air circulation through the case by the action of the fan.
  • As a result, the proposed case has very advantageous features for small fans arranged in electronic apparatus or similar applications, acquiring its own identity and preferred character with respect to conventional fans of those applications.
    • Description of the Drawings
    • Figure 1 shows an exploded perspective view of a fan assembly (including a fan case) made according to the invention.
    • Figure 2 is a diametral section view of the fan assembly of the preceding figure, now mounted.
    • Figure 3 is a perspective view of the fan seen from the front part.
    • Figures 4, 5 and 6 are perspective views seen from the rear part of respective fans provided with cases made according to the object of the invention with different numbers of bars in the opening of the lateral contour of the circular body.
    Detailed Description of the Invention
  • The object of the invention relates to a fan assembly, which includes a fan case, and particularly one that can be incorporated in electronic apparatus or similar applications, with a structural embodiment that advantageously favors the passage of air for the venting function, comprising a body (1), inside which there is housed an air impeller (2), associated with a rotary motor (3), whereas the front part of the case is closed with a cover (4) in the form of a grating.
  • The body (1) of the case is circular-shaped and has an opening (5) along its lateral contour for the passage of air, which opening (5) is defined between longitudinal bars (6) having an aerodynamically-shaped section oriented with a lateral inclination with respect to the radial plane, the number of said bars (6) being able to vary from a large number of bars (6) with free, narrow, intermediate spaces between them, like in the embodiment of Figures 1, 3 and 4, to a more or less reduced number of bars (6) with free, wide, intermediate spaces between them, like in the embodiments of Figures 5 and 6.
  • The cover (4) of the front part of the case in turn defines a grating with concentric circular ribs (7), which have a flared shape varying from the ribs (7) closest to the center to those on the periphery, as can be seen in Figure 3.
  • The cover (4) furthermore determines in the peripheral contour an arched flange (8), which in the mounted arrangement of said cover (4) faces an arched flange (9) arched in an opposing manner defined by the bottom of the circular body (1) of the case, such that between said flanges (8 and 9) there is defined a mouth which widens outwardly in relation to the opening (5) of the lateral contour of said circular body (1) of the case, the walls of said mouth being defined by the mentioned flanges (8 and 9), as a prolongation of the walls (10) of an opening (11) defined by the impeller (2) of the fan in the periphery thereof.
  • Therefore, when the impeller (2) is rotated by the motor (3), outer air is absorbed through the front cover (4) and air inside the case is expelled through the opening (5) of the lateral contour of the body (1), giving rise to a forced air passage circulation through the case, which allows effectively removing heat from inside an electronic apparatus or any other means of application.
  • For said circulation of the air through the case, the entrance of the air is favored by the varying flared configuration of the ribs (7) forming the grating of the cover (4), whereas the mouth defined by the flanges (8 and 9) favors the exit of air through the opening (5) of the lateral contour of the body (1) of the case, the aerodynamic configuration and the orientation of the bars (6) of said opening (5) of the lateral contour of the body (1) also helping to facilitate such exit of air.
  • On the other hand, the continuity of the flanges (8 and 9) forming the air outlet mouth in relation to the walls (10) of the peripheral opening (11) of the impeller (2) of the fan prevents head losses in the exit path for the air.
  • Furthermore, the cover (4) forms with respect to the impeller (2) of the fan housed inside the case a labyrinth coupling (12), as seen in Figure 2, which determines difficulties for the air exhaust passage between the mentioned cover (4) and the impeller (2), in turn preventing head losses through said coupling, but without complicating the functional rotation of the impeller (2), which is left to completely rotate freely.
  • As a result, both by eliminating head losses in the entrance and exit paths for the air and because of the conditions facilitating the entrance and exit of air in the case, a very effective circulation of air is achieved with reduced power consumption of the motor (3) moving the impeller (2).

Claims (2)

  1. A fan assembly, comprising: an air impeller (2) associated with a motor (3); and a fan case, the fan case comprising a body (1) in which there is housed the air impeller (2) associated with the motor (3), incorporating in the front part a cover (4) in the form of a grating, with the body (1) having along its lateral contour an opening (5) defined between a variable number of longitudinal bars (6) each having an aerodynamic section oriented with a lateral inclination relative to a respective radial direction from a centre of the body (1), and with the cover (4) defining a grating formed by concentric circular ribs (7), said cover (4) having in the peripheral contour a flange (8) facing another flange (9) defined by the bottom of the body (1), between said flanges (8 and 9) there is defined a mouth, with the walls of said mouth being configured to be a prolongation of walls (10) forming the peripheral opening (11) of the impeller (2);
    characterized in that: the body (1) is circular-shaped; the concentric circular ribs (7) have a flared shape, with the flared shape varying from the rib closest to a centre of the cover (4) to the rib closest to the periphery of the cover (4);
    the flange (8) of the cover (4) is arched; and the flange (9) of the body (1) is arched in an opposing manner to the flange (8) of the cover (4) such that the mouth widens outwardly in relation to the opening (5).
  2. The fan assembly according to claim 1, wherein the cover (4) forms in relation to the impeller (2) a labyrinth coupling (12) which is configured to complicate the discharge of air through an air exhaust passage formed by said coupling, leaving the impeller (2) to rotate freely.
EP14162817.2A 2013-04-16 2014-03-31 Fan assembly comprising a case for the impeller Active EP2792885B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL14162817T PL2792885T3 (en) 2013-04-16 2014-03-31 Fan assembly comprising a case for the impeller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES201330543A ES2509990B1 (en) 2013-04-16 2013-04-16 FAN BOX

Publications (2)

Publication Number Publication Date
EP2792885A1 EP2792885A1 (en) 2014-10-22
EP2792885B1 true EP2792885B1 (en) 2016-08-31

Family

ID=50542793

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14162817.2A Active EP2792885B1 (en) 2013-04-16 2014-03-31 Fan assembly comprising a case for the impeller

Country Status (4)

Country Link
EP (1) EP2792885B1 (en)
DK (1) DK2792885T3 (en)
ES (1) ES2509990B1 (en)
PL (1) PL2792885T3 (en)

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Publication number Priority date Publication date Assignee Title
DE102015207800A1 (en) 2015-04-28 2016-11-03 Ziehl-Abegg Se Diagonal or centrifugal fan, guide for such a fan and system with such a fan or with several such fans
DE102015207948A1 (en) * 2015-04-29 2016-11-03 Ziehl-Abegg Se Inlet nozzle for a radial, diagonal or axial fan and radial, diagonal or axial fan with an inlet nozzle
CN106647982A (en) * 2016-10-14 2017-05-10 柳州译海网络科技有限公司 Computer radiator
DE102018202487A1 (en) 2018-02-19 2019-08-22 Ziehl-Abegg Se Fan and method for mounting a fan
CN108401402B (en) * 2018-03-30 2020-02-21 上海斐讯数据通信技术有限公司 Multistage air-cooled heat abstractor
DE102018211808A1 (en) 2018-07-16 2020-01-16 Ziehl-Abegg Se Fan and control device for a fan

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GB896841A (en) * 1958-03-21 1962-05-16 Norvent Ltd Improvements in or connected with air diffusers or ventilators
DE3343078A1 (en) * 1983-11-29 1985-06-05 Walfried Dipl.-Ing. 5400 Koblenz Dost Heaters in the form of radiators, panels and convectors
DE9408379U1 (en) * 1994-05-20 1994-07-21 Gebhardt Ventilatoren GmbH & Co, 74638 Waldenburg Fan unit
AU2003298481A1 (en) * 2003-01-29 2004-08-23 Koninklijke Philips Electronics N.V. Outlet grill for use in an air-blowing device having an axial fan
EP1718873A1 (en) * 2004-01-30 2006-11-08 Farmer Controls Plc Electric fan
WO2010052074A1 (en) * 2008-11-07 2010-05-14 Ebm-Papst Mulfingen Gmbh & Co. Kg Diagonal fan
DE202008002356U1 (en) * 2008-02-19 2009-06-25 Ebm-Papst Mulfingen Gmbh & Co. Kg compact fans
DE202009017511U1 (en) * 2009-12-22 2011-05-05 Ebm-Pabst Mulfingen Gmbh & Co. Kg Fan unit for filter fan
KR101812014B1 (en) * 2010-12-03 2017-12-26 엘지전자 주식회사 Brower for air conditioner
JP5769978B2 (en) * 2011-01-27 2015-08-26 ミネベア株式会社 Centrifugal fan

Also Published As

Publication number Publication date
ES2509990B1 (en) 2015-07-28
EP2792885A1 (en) 2014-10-22
PL2792885T3 (en) 2017-04-28
DK2792885T3 (en) 2016-12-19
ES2509990R1 (en) 2014-12-30
ES2509990A2 (en) 2014-10-20

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