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EP1070851B1 - Soufflante - Google Patents

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Publication number
EP1070851B1
EP1070851B1 EP00115430A EP00115430A EP1070851B1 EP 1070851 B1 EP1070851 B1 EP 1070851B1 EP 00115430 A EP00115430 A EP 00115430A EP 00115430 A EP00115430 A EP 00115430A EP 1070851 B1 EP1070851 B1 EP 1070851B1
Authority
EP
European Patent Office
Prior art keywords
fan
sound
damping
fan housing
housing
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
EP00115430A
Other languages
German (de)
English (en)
Other versions
EP1070851A3 (fr
EP1070851A2 (fr
Inventor
Andreas Dr. Eilemann
Jörg Dipl.-Ing. Kilian
Franz Veitl
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.)
Bayerische Motoren Werke AG
Mahle Behr GmbH and Co KG
Original Assignee
Bayerische Motoren Werke AG
Behr 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 Bayerische Motoren Werke AG, Behr GmbH and Co KG filed Critical Bayerische Motoren Werke AG
Publication of EP1070851A2 publication Critical patent/EP1070851A2/fr
Publication of EP1070851A3 publication Critical patent/EP1070851A3/fr
Application granted granted Critical
Publication of EP1070851B1 publication Critical patent/EP1070851B1/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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/02—Selection of particular materials
    • F04D29/023—Selection of particular materials 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
    • F04D29/66—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
    • F04D29/663—Sound attenuation
    • F04D29/665—Sound attenuation by means of resonance chambers or interference
    • 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
    • F05D2260/00—Function
    • F05D2260/96—Preventing, counteracting or reducing vibration or noise
    • 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
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/40—Organic materials
    • F05D2300/43—Synthetic polymers, e.g. plastics; Rubber

Definitions

  • the invention relates to a fan, in particular for the ventilation of the passenger compartment of a motor vehicle with the features mentioned in the preamble of claim 1.
  • a fan is e.g. from EP-A-0 837 246.
  • the fan wheel working in such blowers generates noise when the air flow is conveyed, the sound energy of which, at least partially, passes through the ventilation duct into the passenger compartment together with the conveyed air flow, where it leads to an undesirably high noise level.
  • a sound-absorbing fan housing is known with wall portions consisting of a foam-sheathed support frame.
  • the foam has a sound-absorbing and supporting skeleton a supporting function.
  • a certain thickness of the foam is required, for which there is not always sufficient space available.
  • EP 0 412 454 B1 shows a housing of a single-flow radial fan with a sound-damping effect. It is about one Blower arranged a spiral casing, which consists of a hard, porous and multi-layered material. A layer of this material has a variable specific gravity with the thickness direction and also with the surface direction. As a result, the sound insulation properties are adapted to the local conditions and improved overall space. The production of such a housing requires a lot of technology.
  • the invention has for its object to provide a generic blower, in which the noise emission is reduced.
  • the invention is based on the idea of repeatedly guiding the sound waves generated by an impeller through a damping surface of damping sound-permeable material. With each passage of the sound waves through this damping surface a part of the sound energy is dissipated, which is why the damping surface compared to known sound-insulating surfaces can be made thin and simple in construction. As a result, a noise-reduced blower is created, which is simple and has a low overall volume.
  • This idea is implemented by a fan housing having a damping surface of a damping sound-permeable material and the fan housing in turn is surrounded by a made of a sound-reflecting material reflection box in the region of the damping surface.
  • the reflection box forms a resonance chamber with the blower housing and the damping surface.
  • the ones from Blower wheel generated sound waves propagate through the damping surface in the resonance chamber, whereby they are damped for the first time when passing through the damping surface. After passing through the resonance chamber, they are reflected by the wall and hit the damping surface a second time. On re-passing through the damping surface, this time back to the impeller, the sound waves are once again damped, causing the sound level to reach the desired low level.
  • the reflection box needs to be no additional component, as in many known fan constructions, due to the function of the fan, a suitable box is available.
  • the fan housing in the form of a spiral housing is enclosed by an overflow box for supplying both inlet openings with air.
  • the construction of existing overflow box is designed without additional effort and space as a reflection box.
  • the damping surface is formed in a simple manner by a supporting grid structure, which is covered with a damping membrane, whereby the wall thickness can be kept very low.
  • the damping surface and in particular the entire blower housing is formed of foamed plastic, which can be realized with little effort manufacturing technology. This training also allows a simple way to attach a provided for the protection of the inlet opening inlet grate by lathering the blower housing.
  • Fig. 1 shows a radial fan with a about an axis 13 rotatably movable Radialgebläserad 3 for conveying air.
  • a fan housing 1 the wall portions of which form a fan spiral 10, surrounds the fan wheel 3 so that a discharge opening 12 remains on the circumference.
  • the fan housing 1 On its front side, the fan housing 1 in the region of the axis 13 of the impeller 3 to an inlet opening 9.
  • the inlet opening 9 is covered with an inlet grille 8.
  • the fan housing may have one or more separate damping surfaces 2 arranged on the peripheral side or damping surfaces 2 'arranged on the end side.
  • the entire blower housing 1 as a contiguous damping surface 2, 2 ' is formed, in which the blower housing 1 of a damping sound-transmitting material, and in particular of foamed Plastic is formed.
  • the reflection box 4 is designed as a transfer box 11 with a substantially quadrangular plan view and surrounds the blower housing 1 partially in the region of the damping surfaces 2, 2 '.
  • One corner of the overflow box 11 is arranged in the region of the outflow opening 12; in the remaining three corners of the overflow 11 forms together with the fan housing 1 and the damping surfaces 2 each have a circumferential resonant space 5.
  • the reflection box 4 is made of sound-reflecting material, preferably made of injection-molded plastic.
  • the inlet grate 8 covers the inlet opening 9 and can be connected to the fan housing 1 by gluing, welding, screwing or snap-in connections.
  • the inlet grate 8 is foamed in the edge region 14 of the inlet opening 9 in the material of the blower housing 1.
  • Fig. 2 view of the embodiment of Fig. 1 it is clear that this is a double-flow radial fan, each with an inlet opening 9 on the two end faces of the fan housing 1.
  • the fan housing 1 is surrounded by a transfer box 11 so that both inlet openings 9 are supplied together by the intake openings 15 with fresh air.
  • the fresh air flow is also used for cooling the dashed lines shown Blower motor 16.
  • the overflow box 11 also forms a reflection box 4 in the region of the two end faces of the fan housing 1, which in turn together with the blower housing 1 and its frontal damping surfaces 2 'each form a frontal space 5'.
  • the two end-side spaces 5 ' are connected with one another via the three peripheral spaces 5 shown in FIG. 1 to form a coherent resonance space 5, 5'.
  • the fan housing 1 may also have on its peripheral or end faces one or more damping surfaces 2, each consisting of a support grid 7 and a support grid 7 covering the damping diaphragm 6.
  • damping surfaces 2 are circumferentially arranged on the blower housing 1.
  • the blower shown corresponds to the embodiment of FIGS. 1 and 2, so that the damping surfaces 2 together with the blower housing 1 and designed as a reflection box 4 overflow box 11 in each of its three corners form a circumferential resonant space 5.
  • the existing of a damping diaphragm 6 and a support grid 7 damping surfaces 2 are so far expanded in the circumferential direction 7, that they merge into one another and form a single damping surface 2.
  • the fan is formed with two columns each with an inlet opening 9 on the two end faces of the fan housing 1.
  • the fan housing 1 is enclosed by an overflow box 11, which also forms the reflection box 4.
  • the reflection box 4 together with the blower housing 1 and the damping surface 2 a continuous Resonant chamber 5, 5 ', which consists both of two frontally of the blower housing 1 arranged spaces 5' as well as of Fig. 3 of three peripheral rooms 5.

Landscapes

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

Claims (6)

  1. Soufflante, en particulier pour l'aération d'un habitacle de véhicule, composé d'un carter de soufflante (1) avec des zones de paroi formant une spirale de soufflante (10), zones de paroi réalisées au moins en partie sous forme de surface d'amortissement (2) amortissant le bruit, en un matériau perméable au bruit et amortissant, ainsi qu'une roue de soufflante radiale (3) disposée dans le carter de soufflante (1), caractérisé en ce que la soufflante est réalisée comme une soufflante radiale à deux flux, avec deux ouvertures d'admission séparées (9) et un caisson de dérivation d'écoulement (11) pour alimenter les deux ouvertures d'admission (9) en air, et en ce que le carter de soufflante (1), dans la zone de la surface d'amortissement (2), est enfermée par le caisson de dérivation (11) en formant un caisson de réflexion (4) formé d'un matériau réfléchissant le bruit, de manière que le caisson de réflexion (4), conjointement avec le carter de soufflante (1) et la surface d'amortissement (2), forment un espace de réflexion (5), adapté de manière que des ondes sonores, venant de l'intérieur du carter de soufflante (1) et passant de façon amortie à travers la surface d'amortissement (2) et pénétrant dans l'espace de réflexion (5), soient réfléchies par le caisson de réflexion (4) et retournées avec amortissement du bruit dans le carter de soufflante (1), en passant par la surface d'amortissement (2) une fois supplémentaire.
  2. Soufflante selon la revendication 1, caractérisée en ce que la surface d'amortissement (2) est formée d'une grille de soutien (7), couverte d'une membrane d'amortissement (6) perméable au bruit.
  3. Soufflante selon la revendication 1, caractérisée en ce que la surface d'amortissement (2) est formée d'une matière synthétique rendue alvéolaire, laissant passer le bruit en l'amortissant.
  4. Soufflante selon la revendication 3, caractérisée en ce que le carter de soufflante (1) est formé d'une matière synthétique rendue alvéolaire, laissant passer le bruit en l'amortissant.
  5. Soufflante selon la revendication 4, caractérisée en ce que le carter de soufflante (1) présente deux ouvertures d'admission (9) couvertes par une grille d'admission (8), et en ce que, dans la zone de bordure (14) des ouvertures d'admission (9), la grille d'admission (8) est reliée au carter de soufflante (1) par un moussage dans la masse.
  6. Soufflante selon l'une des revendications 1 à 5, caractérisée en ce que le caisson de réflexion (4) est formé de matière synthétique, de préférence de polypropylène.
EP00115430A 1999-07-23 2000-07-18 Soufflante Expired - Lifetime EP1070851B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19934586A DE19934586A1 (de) 1999-07-23 1999-07-23 Gebläse
DE19934586 1999-07-23

Publications (3)

Publication Number Publication Date
EP1070851A2 EP1070851A2 (fr) 2001-01-24
EP1070851A3 EP1070851A3 (fr) 2002-04-17
EP1070851B1 true EP1070851B1 (fr) 2006-07-12

Family

ID=7915810

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00115430A Expired - Lifetime EP1070851B1 (fr) 1999-07-23 2000-07-18 Soufflante

Country Status (2)

Country Link
EP (1) EP1070851B1 (fr)
DE (2) DE19934586A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4268588B2 (ja) * 2005-01-11 2009-05-27 株式会社共立 送風ファン及びそれを備えた作業機

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2225398A (en) * 1939-09-13 1940-12-17 Clyde M Hamblin Construction of ventilating fans
GB926088A (en) * 1960-11-08 1963-05-15 Brightside Heating & Engineeri Improvements relating to centrifugal fans
DE1403496A1 (de) * 1961-07-01 1969-01-30 Daimler Benz Ag Kuehl- oder Heissluftgeblaese
US3312389A (en) * 1964-05-04 1967-04-04 Fukuo Saeki Air blower device with silencer
DE2240104A1 (de) * 1972-08-16 1974-02-28 Buderus Eisenwerk Schaufelgeblaese
FR2457399A1 (fr) * 1979-05-23 1980-12-19 Citroen Sa Silencieux de ventilateur
DE3639138C2 (de) * 1986-11-15 1993-11-11 Behr Gmbh & Co Gehäuse zur Führung von Luftströmen
JP2630652B2 (ja) * 1989-08-09 1997-07-16 三菱電機ホーム機器株式会社 送風機
AU635867B2 (en) * 1990-10-22 1993-04-01 Hitachi Automotive Engineering Co., Ltd. Centrifugal fan with noise suppressing arrangement
TW381150B (en) * 1996-03-29 2000-02-01 Sanyo Electric Co Electric fan
DE29611707U1 (de) * 1996-07-05 1997-10-30 AEG Hausgeräte GmbH, 90429 Nürnberg Spiralgehäuse für ein Luftfördergebläse in einem Haushaltsgerät, insbesondere in einem elektrischen Wäschetrockner
SE9603762L (sv) * 1996-10-15 1998-04-16 Pm Luft Fläkthus för matning av luft till ett ventitlationssystem

Also Published As

Publication number Publication date
EP1070851A3 (fr) 2002-04-17
EP1070851A2 (fr) 2001-01-24
DE19934586A1 (de) 2001-01-25
DE50013145D1 (de) 2006-08-24

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