EP3592985A1 - Ensemble de pièces et procédé de fabrication d'un ventilateur radial - Google Patents

Ensemble de pièces et procédé de fabrication d'un ventilateur radial

Info

Publication number
EP3592985A1
EP3592985A1 EP18769301.5A EP18769301A EP3592985A1 EP 3592985 A1 EP3592985 A1 EP 3592985A1 EP 18769301 A EP18769301 A EP 18769301A EP 3592985 A1 EP3592985 A1 EP 3592985A1
Authority
EP
European Patent Office
Prior art keywords
fan
housing part
parts
fan wheel
wheel
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
EP18769301.5A
Other languages
German (de)
English (en)
Other versions
EP3592985B1 (fr
Inventor
Wolfgang Laufer
Peter Ragg
Arno Karwath
Francisco Rojo
Paul Rosas
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.)
Filing date
Publication date
Application filed by Ebm Papst St Georgen GmbH and Co KG filed Critical Ebm Papst St Georgen GmbH and Co KG
Publication of EP3592985A1 publication Critical patent/EP3592985A1/fr
Application granted granted Critical
Publication of EP3592985B1 publication Critical patent/EP3592985B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
    • 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
    • F04D25/16—Combinations of two or more pumps ; Producing two or more separate gas flows
    • F04D25/166—Combinations of two or more pumps ; Producing two or more separate gas flows using 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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/30—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
    • F04D29/40—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
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/582—Cooling; Heating; Diminishing heat transfer 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
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/624—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially 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
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/624—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/626—Mounting or removal of 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
    • 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
    • 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
    • F05D2230/00—Manufacture
    • F05D2230/60—Assembly methods
    • 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
    • F05D2230/00—Manufacture
    • F05D2230/60—Assembly methods
    • F05D2230/61—Assembly methods using limited numbers of standard modules which can be adapted by machining
    • 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
    • F05D2230/00—Manufacture
    • F05D2230/80—Repairing, retrofitting or upgrading methods
    • 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
    • F05D2240/00—Components
    • F05D2240/55—Seals

Definitions

  • the present invention relates to a kit of parts for the manufacture of a radial fan and its use.
  • a radial fan typically has a housing with a chamber in which a fan rotates about an axis, an inlet opening adjacent the axis, and an outlet opening located at the periphery of the chamber.
  • the relationship between the speed of the fan wheel, pressure difference between the inlet and outlet ports and the flow rate depends on the geometry of the fan wheel and the receiving chamber and a characteristic of each fan model. The requirements for this connection vary depending on the application for which the radial fan is intended. If a fan is used, for example, for cooling purposes, then its volume flow should vary as little as possible with the pressure difference in order to ensure a sufficient flow of cooling air even under unfavorable conditions, e.g. in a restricted cross-section of the cooling air path, to be able to maintain.
  • a ventilator is used to ventilate a patient, a strong dependence of the volumetric flow on the pressure difference is desirable, on the one hand, when the patient inhales, to be able to provide a high volumetric flow, but, on the other hand, not due to a high backpressure to hinder.
  • the aim of the present invention is to provide a set of parts and a method with which fans can be provided inexpensively with each adapted for a particular application relationship between pressure difference and flow.
  • kit of parts for a radial fan in addition to a first fan, a base housing part and a complementary housing part, which are RGBhegbar to form a surrounding the fan, having an inlet opening and an outlet opening housing, at least a second fan to - summarizes, whose shape differs from that of the first fan, and which is mounted in the wheel chamber rotatable about an axis instead of the first fan.
  • the fan wheel is suitably optimized specifically for a desired relationship between pressure and flow rate and is required in several versions to represent different contexts, can be dispensed with an application-specific modification of the housing parts. Cost advantages thus result, on the one hand, from the fact that the non-application-specific parts can be provided inexpensively in large numbers, but also because the application-specific fan wheels are necessarily smaller than the housing parts delimiting the wheel chamber accommodating them, and therefore with small-sized, relatively simple ones and accordingly inexpensive tools can be manufactured.
  • the advantage of simple production comes in particular when the fan wheels each have a base plate and from the base plate in the axial direction projecting blades with facing away from the base plate free edges, as these generally formed with only two in the direction of the axis mutually movable tool parts during manufacture of the housing parts, in particular when these cooperating detents have medium, even in the radial direction movable tool parts are required.
  • the inlet opening is provided in the complementary housing part, then, when one of the fan wheels is mounted in the wheel chamber, its base plate should face the base housing part and the airfoils should face the complementary housing part (3).
  • the outlet should lie approximately in the plane of the fan wheel and is therefore expediently limited on the one hand by the base housing part and on the other hand by the complementary housing part.
  • interfaces for attachment to a shaft of the motor.
  • These interfaces may e.g. Passages with identical, non-circular cross-section, in which the shaft is inserted torque-fit, or along the axis spaced flanges on both sides of a passage, the e.g. allow a clamping of the fan between a shoulder of the shaft and a nut screwed.
  • the complementary housing part may have on the wall bounding the wheel chamber a structure extending concentrically about the axis, and the fan wheels may be contoured at the free edges of their airfoils which, with the concentric structure, form a labyrinth seal form.
  • the concentric structure may be a circumferential groove facing projections at the edges of the airfoils, or the concentric structure may be one Have around the axis extending projection opposite to the respective recesses of the free edges.
  • the first and the second fan should differ by the number and / or the length of the blades.
  • Other features such as the shape of the base plate, the axial extent of the blades, their wall thickness or the course of their free edges, can remain the same in the set by the manufacturing accuracy limits of a fan to the other.
  • the expense of designing and manufacturing molds for the various fan wheels may be limited by deriving the shape of the second fan from that of the first fan by adding at least one airfoil, i. that the first impeller would fit into the mold used to make the second mold and fill it apart from the added airfoil.
  • the radius of a near-axis end of the added airfoil should be greater than that of a proximal end of at least one airfoil of the first fan.
  • each fan necessarily have an inner edge oriented transverse to the direction of air flow, past which the blast air enters a channel between two air blades. As can be deduced from the previous paragraph, this distance may be different for the impellers of a single impeller.
  • the parts set comprises two fan wheels, which differ by the distance of their respective axially innermost inner edge of the axis.
  • strong pressure increase should be at least one impeller, the axially closest inner edge at least partially within a cylinder concentric to the axis whose diameter corresponds to the diameter of the inlet opening.
  • the fan is preferably mounted on the base housing part, opposite the inlet opening of the complementary housing part.
  • installation space for a fan motor driving motor is provided on the base housing part.
  • the object is further achieved by a method for manufacturing a radial fan with the steps
  • Figure 1 shows a set of parts according to the invention in an exploded axial section.
  • Fig. 2 is a plan view in the axial direction of a Grundgeh part and a fan of the parts set;
  • Fig. 3 is an enlarged detail of the finished fan in a radial section
  • Fig. 4-7 plan views of different fan wheels of the parts set
  • FIG. 8 shows pressure-volume flow characteristics of different fan wheels.
  • FIG. 1 shows an exploded view of a basic housing part 1, a fan wheel 2 and a complementary housing part 3 of a radial fan.
  • the sectional plane of FIG. 1 runs along a rotation axis 4 of the fan wheel 2.
  • the base housing part 1 comprises a bottom plate 5, an outer wall 6 and an elastic buffer ring 7, via which the bottom plate 5 is connected to the outer wall 6 to form an outer cup.
  • an electric motor 9 is concentrically received, forming an annular circumferential cooling air channel 8, and enclosed by a supported on a shoulder 10 of the outer wall 6 intermediate wall 1 1.
  • the electric motor 9 comprises a shaft 12, a rotor 13, a stator 14, a printed circuit board 15 carrying an inverter for supplying the stator 14, and a housing enclosing said components 12-15.
  • the housing comprises an inner cup 16 and a cover 17 closing the inner cup 16, through the central opening of which the shaft 12 protrudes.
  • the intermediate wall 11 and the cover 17 which is exposed in an opening of the intermediate wall form a central pial around the axis of rotation 4. 18.
  • a plateau 18 surrounding edge region of the intermediate wall 1 1 jumps back into the interior of the outer cup and limited together with the outer wall 6 a groove 19 which extends along the circumference of the cup gradually increasing cross-section around the axis of rotation 4.
  • the fan 2 has a transverse to the axis of rotation 4 oriented base plate 20 whose diameter is not greater than that of the plateau 18.
  • One side of the base plate 20 is in the assembled state of the plateau 18 closely adjacent.
  • An axial passage 47 of the fan 2 is provided to receive the end of the shaft 12.
  • the passage 47 is formed in a sleeve made of metal, in particular brass, are molded onto the base plate 20 and blades 21 of the impeller 2, and whose inner diameter with the diameter of the shaft 12 is tuned so that the fan 2 by Pressing on the shaft 12 can be mounted.
  • This page may be in the shape of a cone or a hyperboloid of revolution.
  • the basic housing part 1 and the fan wheel 2 mounted on the shaft 12 can be seen in plan view. It can be clearly seen the channel 19, which, starting from a starting point 22 gradually becomes wider, extending counterclockwise around the fan 2 and merges into a tangent to the circumference of the fan 2 branching outlet 23.
  • the blades 21 have the shape of ribs, which extend starting from an axis of rotation 4 facing the inner end 33 spirally up to the edge of the base plate 20.
  • the intermediate wall 1 1 has one or more openings 24 through which the channel 19 communicates with the cooling air channel 8 in the vicinity of the starting point 22. These openings 24 are shown in FIG. 2 by the fan 2 hidden and therefore shown with dashed lines. Another passage 25 between the channel 19 and the cooling air channel 8 is located at the outlet 23.
  • the rotation of the fan wheel 2 generates a higher pressure before the passage 25 than at the openings 24, so that air enters the cooling air passage 8 via the passage 25, where it absorbs waste heat from the motor 9 and leaves the cooling air passage 8 again via the openings 24.
  • a radial wall 26 between the motor 9 and the outer wall 6 passes through the cooling air passage 8 and forces the sucked air, on the way from the passage 25 to the openings 24 to almost completely circumscribe the motor 9.
  • the complementary housing part 3 has an end wall 28 extending around an inlet opening 27 about the axis of rotation 4, whose funnel-shaped inner surface 29 in the assembled state faces away from the base plate 20, facing free edges 30 of the air blades 21 at a small distance.
  • the funnel-shaped inner surface 29 extends radially beyond the edge of the base plate 20 and meets an inner side of the outer wall 6.
  • the end wall 28 thus limited in the fully assembled fan on the one hand a wheel chamber 31 in which the fan 2 rotates, and, together with the Trough 19, a around the wheel chamber 31 extending around Blasluftkanal 32, in which the rotation of the fan 2 generates an overpressure.
  • the inner surface 29 is divided by a flat groove 43 in an inner and an outer portion 44, 45, both of which are convex.
  • the groove 43 are projections 46 at the edges 30 of the blades 21 opposite.
  • annular flange 34 extends around the inner surface 29 perpendicular to the axis of rotation 4. It faces a flange 35 at an upper edge of the outer wall 6. Both flanges 34, 35 each have an annular groove 36. A in the mounted state in both annular grooves 36 engaging sealing ring 37 seals the blast air duct 32 radially outward.
  • projecting bracket 38 are distributed over the flange 34. These are intended to be snapped onto protrusions 39 (see Fig. 2) on the outer wall 6 of the base housing part 1 during assembly of the housing and thus permanently connect the housing parts 1, 3 to each other.
  • Fig. 4 shows the fan 2 of Fig. 1 and 2 once again to make it clearer, in which this fan 2 of other, shown in Fig. 5-7 fan wheels 2, 2 ", 2"'of
  • the set of parts according to the invention differs and wherein the fan wheels are the same.
  • the second 5 and 6 are identical in number, wall thickness and course of the edge 30.
  • the fan wheel 2 'of Fig. 5 are in each space between two blades 21 an airfoil, the fan 2 "of Fig. 6 each two additional blades 21 'inserted.
  • the frequency with which an outer end of an airfoil passes by the starting point 22 and causes turbulence there, as compared with the fan 2 also doubles or blocks the additional airfoils 21' which need the turbulence. in order to be able to spread, and dampen them greatly.
  • the result of this is, on the one hand, an attenuation of the flow noise of the fan wheel, and, on the other hand, a frequency increase, with which a suitable speed of the fan displaces part of the operating noise spectrum out of the audible frequency range. Both contribute to the fact that the fan wheels 2 ', 2 "have a reduced compared to the fan 2 operating noise.
  • the inner ends 33 'of the additional airfoils 21' are located at a greater distance from the axis 4 than the inner ends 33 of the airfoils 21. While the inner edges 40 of the airfoils 21 to a large extent within the radius r Run the inlet opening 27, corresponding edges 40 'of the additional blades 21' are outside.
  • the number of blades is the same for both of them, the difference between the two being that the fan 2 '' has the inner ends 33 of all the blades 21 '. lie beyond the radius r of the inlet opening 27.
  • Fig. 8 illustrates the influence of these design differences based on pressure-volume flow characteristics of the fan wheels 2, 2 "and 2"'.
  • the characteristics are shown in arbitrary units, since the values differ in each case depending on the dimensions of the fan wheels and the speed; However, they are included for fan wheels with the same dimensions at the same speed and so far comparable.
  • the strongest dependence of the volume flow V of the pressure difference Dp is the fan wheel 2. This is therefore well suited to close from the easy and safe measurable pressure increase on the flow and, by the speed is controlled pressure-dependent to produce a predetermined volume flow.
  • the fan wheel 2 "achieves the highest values of volume flow and pressure and is therefore suitable for constructing a fan with high power density.
  • the dependence of the pressure increase on the volume flow is low, above all in the lower volume flow range; Therefore, a fan with this fan in an application with fluctuating flow limit pressure fluctuations, for example, prevent strong pressure increases in a respirator when in a Ausatmungsphase the patient, the flow is interrupted, and then allow a peaceful inhalation.

Landscapes

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

Abstract

Ensemble de pièces destiné à un ventilateur radial, qui comprend une roue de ventilateur (2), une partie de boîtier de base (1) et une première partie de boîtier complémentaire (3), qui peuvent être assemblées pour former un premier boîtier entourant la roue de ventilateur (2) et comportant une ouverture d'admission (27) et une sortie (23). L'invention est caractérisée en ce qu'au moins une deuxième partie de boîtier complémentaire (3', 3''), dont la forme diffère de celle de la première partie de boîtier complémentaire (3), peut être reliée à la partie de boîtier de base (1), à la place de la première partie de boîtier complémentaire (3), pour former un deuxième boîtier.
EP18769301.5A 2017-09-21 2018-09-04 Kit de pièces et méthode pour produire une soufflante radiale Active EP3592985B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017008855.1A DE102017008855A1 (de) 2017-09-21 2017-09-21 Teilesatz und Verfahren für die Fertigung eines Radiallüfters
PCT/EP2018/073721 WO2019057482A1 (fr) 2017-09-21 2018-09-04 Ensemble de pièces et procédé de fabrication d'un ventilateur radial

Publications (2)

Publication Number Publication Date
EP3592985A1 true EP3592985A1 (fr) 2020-01-15
EP3592985B1 EP3592985B1 (fr) 2024-01-10

Family

ID=63579314

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18769301.5A Active EP3592985B1 (fr) 2017-09-21 2018-09-04 Kit de pièces et méthode pour produire une soufflante radiale

Country Status (5)

Country Link
US (1) US11359640B2 (fr)
EP (1) EP3592985B1 (fr)
CN (1) CN208793265U (fr)
DE (2) DE102017008855A1 (fr)
WO (1) WO2019057482A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020118650A1 (de) * 2020-07-15 2022-01-20 Ventilatorenfabrik Oelde, Gesellschaft mit beschränkter Haftung Radialventilator

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Publication number Priority date Publication date Assignee Title
US4902199A (en) * 1986-10-14 1990-02-20 Xerox Corporation Universal blower
DE4115485A1 (de) * 1991-05-11 1992-11-12 Mulfingen Elektrobau Ebm Antriebseinheit fuer doppelluefter
JP3632789B2 (ja) * 1995-08-28 2005-03-23 東陶機器株式会社 多翼遠心ファンの設計方法及び多翼遠心ファン
US5893705A (en) * 1996-12-13 1999-04-13 General Electric Company Integrated motor and blower apparatus having two back-to-back coupled rotors
US6589013B2 (en) * 2001-02-23 2003-07-08 Macro-Micro Devices, Inc. Fluid flow controller
DE20309621U1 (de) * 2003-03-24 2003-09-18 Motoren Ventilatoren Gmbh Radialgebläse
TWI235204B (en) * 2003-10-31 2005-07-01 Delta Electronics Inc Centrifugal fan and its housing
JP5005181B2 (ja) * 2005-04-01 2012-08-22 日本電産サーボ株式会社 遠心ファン
TWI299072B (en) * 2005-06-02 2008-07-21 Delta Electronics Inc Centrifugal fan
US7591633B2 (en) * 2005-09-13 2009-09-22 Trane International, Inc. Centrifugal blower for air handling equipment
US8427020B2 (en) * 2006-04-20 2013-04-23 Carefusion 212, Llc Blower assembly with integral injection molded suspension mount
TWI465184B (zh) * 2010-12-20 2014-12-11 Sunonwealth Electr Mach Ind Co 風扇模組
CN103486085A (zh) * 2012-06-12 2014-01-01 富瑞精密组件（昆山）有限公司 离心风扇
CN104251229A (zh) * 2013-06-28 2014-12-31 苏州宝时得电动工具有限公司 离心式叶轮及包括该离心式叶轮的吹吸装置
DE102016001484A1 (de) * 2016-02-11 2017-08-17 Ebm-Papst St. Georgen Gmbh & Co. Kg Lüftereinheit

Also Published As

Publication number Publication date
US11359640B2 (en) 2022-06-14
US20200182255A1 (en) 2020-06-11
CN208793265U (zh) 2019-04-26
EP3592985B1 (fr) 2024-01-10
WO2019057482A1 (fr) 2019-03-28
DE202018105036U1 (de) 2018-10-24
DE102017008855A1 (de) 2019-03-21

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