EP3596341B1 - Ventilateur - Google Patents

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Publication number
EP3596341B1
EP3596341B1 EP18746183.5A EP18746183A EP3596341B1 EP 3596341 B1 EP3596341 B1 EP 3596341B1 EP 18746183 A EP18746183 A EP 18746183A EP 3596341 B1 EP3596341 B1 EP 3596341B1
Authority
EP
European Patent Office
Prior art keywords
fan
struts
primary
grid
fan according
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
EP18746183.5A
Other languages
German (de)
English (en)
Other versions
EP3596341A1 (fr
Inventor
Wolfgang Laufer
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.)
Ebm Papst St Georgen GmbH and Co KG
Original Assignee
Ebm Papst St Georgen GmbH and Co KG
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.)
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Publication of EP3596341A1 publication Critical patent/EP3596341A1/fr
Application granted granted Critical
Publication of EP3596341B1 publication Critical patent/EP3596341B1/fr
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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
    • F04D29/70—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
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D19/00—Axial-flow pumps
    • F04D19/002—Axial flow fans
    • 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
    • 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
    • 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
    • F04D25/0646—Details of the 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
    • 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
    • F04D25/0693—Details or arrangements of the wiring
    • 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
    • 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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/522—Casings; Connections of working fluid for axial pumps especially adapted for elastic fluid pumps
    • F04D29/526—Details of the casing section radially opposing blade tips
    • 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
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/54—Fluid-guiding means, e.g. diffusers
    • F04D29/541—Specially adapted for elastic fluid pumps
    • 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
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/54—Fluid-guiding means, e.g. diffusers
    • F04D29/541—Specially adapted for elastic fluid pumps
    • F04D29/542—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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/54—Fluid-guiding means, e.g. diffusers
    • F04D29/541—Specially adapted for elastic fluid pumps
    • F04D29/542—Bladed diffusers
    • F04D29/544—Blade shapes
    • 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
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/666—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by means of rotor construction or layout, e.g. unequal distribution of blades or vanes
    • 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
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
    • 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
    • F05D2250/51—Inlet

Definitions

  • the present invention relates to a fan, in particular for installation in a device to be cooled.
  • Essential requirements for such a fan are a compact design, energy efficiency and low-noise operation.
  • Such fans often have a parallelepipedal housing through which a fan passage extends between an upstream and a downstream end face, and a motor and a fan wheel which are accommodated in the fan passage.
  • a fan of this type is e.g. in DE 35 28 748 C2 shown.
  • the motor and the fan wheel are connected to a wall ring delimiting the fan passage by a grid of struts which extends in the radial direction and is arranged on the outflow-side end face of this fan.
  • Such a grille can cause a static pressure increase by reducing the swirl it imparts to the air being blown through it, which improves the static efficiency of the fan and the strength of the airflow.
  • the environment in which a fan is installed can also contribute to the generation of flow noise.
  • asymmetries in the device's flow channels can lead to inhomogeneous inflow onto the fan blades and thus to noise-intensive speed and pressure fluctuations.
  • Internals such as sheet metal edges and abrupt deflections with associated flow separation on components in the inflow to the fan also cause inhomogeneous velocity distributions in the inflow field with which the blades interact.
  • the object of the invention is to create a low-noise and at the same time efficient fan.
  • the primary struts can also carry the fan wheel and possibly its motor via the hub, struts on the outflow-side end face that conventionally serve this purpose can be omitted, which enables a compact design of the fan.
  • the secondary struts can form at least one ring which runs around the axis of the fan and is preferably concentric with the axis.
  • the dimensions of openings defined by the primary and secondary struts in the upstream face should preferably be smaller in the radial direction than in the circumferential direction.
  • the primary and secondary struts should preferably cross each other at right angles.
  • the secondary struts can be shaped as cutouts in the jacket of a cone with a small base area facing the fan wheel.
  • the primary struts may have a cross-section that is linearly elongated in the direction of the axis. This simplifies the one-piece molding of the lattice, particularly when the secondary webs are oriented obliquely to the axis, as is the case with the above-mentioned cutouts in the envelope of the cone.
  • the secondary struts can be advantageous to shape the secondary struts with a curved cross-section, ie as sections of the envelope of a cone with an opening angle that changes over their axial extent.
  • a motor driving the fan wheel is mounted on the hub.
  • a strut guiding the supply cable is designed separately from the grating and is positioned in front of the grating on the inflow side.
  • the grille can be molded in one piece with the wall ring of the housing.
  • the number of primary struts of the grid and the number of blades of the impeller should be prime.
  • the leading edges of impeller airfoils should cross the primary struts.
  • each leading edge crosses at least one primary strut in every phase of rotation of the impeller and is thus continuously exposed to the forces occurring at the crossing point of the edge and strut.
  • the grid can act as an electromagnetic shield for the motor if at least some of the primary or secondary struts are electrically conductive.
  • Conductivity in a plastic molded grid can be due to a conductive additive in the plastic or to a conductive surface coating.
  • FIG. 1 shows a plan view of an inflow-side end face 2 of a fan 1.
  • the end face 2 is square in outline.
  • a circular central area of the end face 2 is filled with a grid 3 .
  • the grating 3 comprises numerous primary struts 4 running in a straight line towards a common center point 5 and secondary struts 6 extending concentrically around the center point 5.
  • the primary struts 4 are each in one piece at their ends with a frame 7 surrounding the grating 3 or a circular, hub 8 occupying the center of grid 3 is connected.
  • the primary and secondary struts 4, 6 crossing each other at right angles define a large number of openings 9.
  • the number of primary struts 4 is significantly greater than that of the airfoils 11; In the example shown here, there are 24 primary struts 4 on five blades 11. Therefore, a slight inclination of the inflow-side edges 13 of the blade blades 11 facing the grid 3 is sufficient so that each inflow-side edge 13 in every position that the fan wheel 10 turns around in the course of one revolution may occupy the axis 12, at least one of the primary struts 4 crosses. Aerodynamic forces acting on the fan wheel 10 as a result of pressure fluctuations occurring in the area where the edges 13 cross with the struts 4 therefore fluctuate only slightly in the course of its rotation and correspondingly also generate only little noise.
  • the cutting plane II-II of the 2 runs along the axis 12 and crosses the openings 9 in each case in the middle between two primary struts 4, so that the secondary struts 6 can be seen in section.
  • the secondary struts 6 each form a section of a cone shell, with the majority of the struts 6 converging in the flow direction of the air, ie dash-dotted lines that illustrate the course of the cone shell in the axial extension of the struts 6 cross the axis 12 downstream of the fan housing 14.
  • the opening angle of the cone envelopes increases with increasing distance of the struts 6 from the axis 12.
  • the arrangement of the struts 6 fanned out in this way favors the intake of air from directions deviating from the axis 12 .
  • the primary struts 4 have an axially elongate cross-section with flanks 14 extending in a direction parallel to the axis 12 . This prevents undercuts that are inaccessible from both directions at the intersections of the primary and secondary struts 4, 6 in the direction of the axis 12; therefore, the grid 3 can be injection molded using only two mold parts movable relative to each other in the direction of the axis 12.
  • a wall ring 15 extends concentrically to the axis from the inner edge of the frame 7, and a second frame, which extends around the end of the wall ring 15 facing away from the inflow-side end face 2, forms an outflow-side end face 16 of the fan 1.
  • the end faces 2, 16 and the wall ring 15 are connected in one piece and form a fan housing 17.
  • this fan housing 17 In order to form this fan housing 17, four mold parts are sufficient, namely the two above-mentioned parts involved in forming the grille 3, one of which is also shown in engages the wall ring 15 in order to form its inner side 18 and an outer side 19 of the end face 16 on the outflow side, as well as two tool parts which can be moved radially to the axis 12 and which each form one half of an outer side 20 of the wall ring 15 and of inner sides 21 of the two end faces 2 facing one another, 16 shapes.
  • the plastic used to form the fan housing 17 can be made electrically conductive by adding graphite or metal powder; then the grid 3 can serve as an electromagnetic shield, which helps to prevent sensitive electronics from being disturbed by electromagnetic emissions from the motor 25 .
  • a sleeve 22 concentric to the axis 12 is formed on the hub 8 .
  • a stator 23 of an electric motor 25 is mounted around the sleeve 22 .
  • An associated rotor 24 is accommodated in a cup 26 which is slipped over the sleeve 22 and is open towards the hub 8 .
  • a shaft 27 extends from the bottom of the cup 26 and is rotatably mounted inside the sleeve 22 via roller bearings 28 .
  • the blades 11 protrude from the periphery of the cup 26.
  • An air gap 30 extends between the hub 8 and an edge 29 of the cup 26 facing it.
  • a umbilical cable 32 extends between the motor 25 and the frame 7.
  • the umbilical cable could be attached to one of the radially oriented primary struts 4.
  • a primary strut would inevitably be wider than the other primary struts due to the supply cable, and since in the course of a rotation of the fan wheel 10 an inflow-side edge 13 only intermittently crosses the strut, a flow noise occurring when the edges 13 sweep past the strut would pulsate and would therefore be clearly perceptible as operating noise even at an objectively low volume.
  • the grid 3 is arranged in the axial direction between the strut carrying the supply cable 32 and the fan wheel, so that the flow conditions (and thus the noise development) at the fan wheel 10 are essentially determined by the grid 3 .
  • the strut guiding the supply cable 32 is positioned in front of the grid 3 in the axial direction.
  • the in is more compact 1 shown placement of the supply cable 32 in a strut 33, which adjoins the inflow-side end face 2 and whose axial extent is smaller than that of the struts 4, 6, so that the latter protrude toward the fan wheel 10 beyond the strut 33 and influences of the strut 33 dampen the flow conditions at the fan wheel 10.
  • Forming the strut 33 as a channel open to the end face 2 has the advantage here that its dimensions can be kept small in the axial direction and between the strut 33 and the fan wheel 10 there is thus plenty of space for struts 4, 6 of the grid 3 which project over the strut 33 towards the fan wheel 10 and dampen the influence of the strut 32.
  • the channel shape of the strut 33 also makes it easier to attach the supply cable 32 to the fan, since after the motor 25 has been assembled, the supply cable 32 is inserted into the channel of the strut 33 and makes contact at one end with the connections of the motor 25 that are exposed on the inflow-side surface of the hub 8 and then the connections by sticking on a label 34 (see Fig. Figures 2, 3 ) on the hub 8 can be hidden.

Landscapes

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

Claims (13)

  1. Ventilateur avec un carter (17) qui présente
    - une face frontale en amont (2),
    - une face d'extrémité en aval (16), et
    - un anneau de paroi (15) s'étendant selon la direction d'un axe (12) d'une des faces frontales (2) à l'autre (16) et délimitant un passage de ventilateur,
    - une roue de ventilateur (10), qui est agencée dans le passage de ventilateur, et une grille (3) agencée sur la face frontale en amont (2), qui présente un moyeu (8) positionné au centre dans le passage de ventilateur et dans la direction radiale entre le moyeu (8) et le bord des entretoises primaires (4) prolongées de passage de soufflante, dans lequel la grille (3) présente en outre des entretoises secondaires (6) croisant les entretoises primaires (4), dans lequel un moteur (25) entraînant la roue de ventilateur (10) est monté sur le moyeu (8), caractérisé en ce que un câble d'alimentation du moteur (25) est guidé sur une entretoise (33) de la grille (3) et l'entretoise guidant le câble d'alimentation est positionnée devant la grille en amont
  2. Ventilateur selon la revendication 1, caractérisé en ce que les moyeux secondaires (8) forment au moins un anneau s'étendant autour de l'axe (12).
  3. Ventilateur selon la revendication 1 ou 2, caractérisé en ce que les entretoises primaires et secondaires (4, 6) délimitent des ouvertures (9) dans la face frontale en amont (2), ouvertures dont les dimensions sont plus petites dans la direction radiale que dans la direction circonférentielle.
  4. Ventilateur selon l'une des revendications précédentes, caractérisé en ce que les entretoises primaire et secondaire (4, 6) se croisent à angle droit.
  5. Ventilateur selon la revendication selon l'une des revendications précédentes, caractérisé en ce que les entretoises secondaires (6) ont la forme de découpes dans l'enveloppe d'un cône avec une petite surface de base faisant face à la roue de ventilateur (10).
  6. Ventilateur selon la revendication 5, caractérisé en ce que l'angle d'ouverture des découpes de l'enveloppe du cône augmente avec la distance entre les entretoises secondaires (6) et l'axe (12).
  7. Ventilateur selon l'une des revendications précédentes, caractérisé en ce que les entretoises primaires (4) présentent une section droite allongée en direction de l'axe (12).
  8. Ventilateur selon l'une des revendications précédentes, caractérisé en ce que l'entretoise (33) recevant le câble d'alimentation (32) a la forme d'un canal ouvert vers la face frontale en amont (2).
  9. Ventilateur selon l'une des revendications précédentes, caractérisé en ce que la grille (3) est formée d'une seule pièce avec l'anneau de paroi (15).
  10. Ventilateur selon l'une des revendications précédentes, caractérisé en ce que le nombre d'entretoises primaires (4) de la grille (3) et le nombre d'aubes (11) de la roue de ventilateur (10) sont premiers.
  11. Ventilateur selon l'une des revendications précédentes, caractérisé en ce que des bords en amont (13) d'aubes (11) de la roue de ventilateur (10) croisent les entretoises primaires (4).
  12. Ventilateur selon la revendication 11, caractérisé en ce que l'étendue des bords en amont (13) dans la direction circonférentielle correspond au moins à l'écartement des entretoises primaires (4) les unes par rapport aux autres.
  13. Ventilateur selon l'une des revendications précédentes, caractérisé en ce qu'au moins certaines des entretoises primaires ou secondaires (4, 6) sont électriquement conductrices.
EP18746183.5A 2017-08-07 2018-07-26 Ventilateur Active EP3596341B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017007370.8A DE102017007370A1 (de) 2017-08-07 2017-08-07 Lüfter
PCT/EP2018/070283 WO2019030006A1 (fr) 2017-08-07 2018-07-26 Ventilateur

Publications (2)

Publication Number Publication Date
EP3596341A1 EP3596341A1 (fr) 2020-01-22
EP3596341B1 true EP3596341B1 (fr) 2023-04-26

Family

ID=63036074

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18746183.5A Active EP3596341B1 (fr) 2017-08-07 2018-07-26 Ventilateur

Country Status (6)

Country Link
US (1) US11221026B2 (fr)
EP (1) EP3596341B1 (fr)
CN (1) CN110637162A (fr)
DE (1) DE102017007370A1 (fr)
FI (1) FI3596341T3 (fr)
WO (1) WO2019030006A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112503030B (zh) * 2020-12-03 2023-04-25 泛仕达机电股份有限公司 一种降噪导流栅
TWI834296B (zh) * 2022-09-16 2024-03-01 大陸商深圳興奇宏科技有限公司 風扇框電連接結構

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EP3596341A1 (fr) 2020-01-22
US20200149536A1 (en) 2020-05-14
CN110637162A (zh) 2019-12-31
US11221026B2 (en) 2022-01-11
FI3596341T3 (en) 2023-06-28
WO2019030006A1 (fr) 2019-02-14

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