WO2013174809A2 - Grille de recouvrement d'une ouverture d'entrée ou de sortie d'un canal traversé par un milieu gazeux - Google Patents

Grille de recouvrement d'une ouverture d'entrée ou de sortie d'un canal traversé par un milieu gazeux Download PDF

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Publication number
WO2013174809A2
WO2013174809A2 PCT/EP2013/060405 EP2013060405W WO2013174809A2 WO 2013174809 A2 WO2013174809 A2 WO 2013174809A2 EP 2013060405 W EP2013060405 W EP 2013060405W WO 2013174809 A2 WO2013174809 A2 WO 2013174809A2
Authority
WO
WIPO (PCT)
Prior art keywords
sound
cover
grille
channel
components
Prior art date
Application number
PCT/EP2013/060405
Other languages
German (de)
English (en)
Other versions
WO2013174809A3 (fr
Inventor
Friedrich E. Blutner
Thomas Nawrot
Aron SCHNEIDER
Gianfranco Cesar ZUAZO RODRIGUEZ
Original Assignee
BSH Bosch und Siemens Hausgeräte GmbH
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 BSH Bosch und Siemens Hausgeräte GmbH filed Critical BSH Bosch und Siemens Hausgeräte GmbH
Publication of WO2013174809A2 publication Critical patent/WO2013174809A2/fr
Publication of WO2013174809A3 publication Critical patent/WO2013174809A3/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F24F13/10—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
    • F24F13/14—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre
    • F24F13/1413—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre using more than one tilting member, e.g. with several pivoting blades
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/24—Means for preventing or suppressing noise
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • D06F58/206—Heat pump arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/24—Means for preventing or suppressing noise
    • F24F2013/242—Sound-absorbing material

Definitions

  • Cover grille for an inlet or outlet opening of a channel through which a gaseous medium flows
  • the invention relates to a grille for an inlet or outlet opening of a channel through which a gaseous medium flows, wherein the grille has a multiplicity of openings formed by its components and the channel is connected at its end remote from the grille to a sound-generating device.
  • the invention relates to a grille for an inlet or outlet opening of a flowed through by a gaseous medium channel, which is arranged at one end of the channel and having a plurality of passage openings, which are formed by components of the cover grille, wherein the channel at its from the grille opposite end is connected to a sound generating device.
  • Grille of the aforementioned genera are generally used to cover wall terminations of pipes or channels, this designed as an opening wall end for entry or exit of a gaseous medium is provided.
  • this wall termination can also open directly into a lying behind this wall interior of a wall-bounded housing, without being followed by a separate channel.
  • the corresponding section of the wall termination, which is formed as a passage, itself considered a channel in the sense of the aforementioned generic features.
  • a machine may be arranged, the fan, compressor, etc. via the grille sucks air or conveys to the outside.
  • the cover grille thereby assumes a protective function, by means of which the risk of being gripped inside the housing or the channel is reduced.
  • the grille prevents dirt or pests from entering the interior of the housing.
  • the grille has a lattice structure formed by corresponding components, which due to the geometric arrangement of the components and their distance from one another prevent the ingress of dirt, vermin and possibly rain or spray.
  • a cover grid of each type mentioned above is known from the document DE 10 2008 042 727 A1.
  • the corresponding grille is provided for a household appliance and is intended to serve to cover an air duct, in which a fan is arranged.
  • the grille consists essentially of a plurality of radially extending struts, to which annular grating rings are fixed, which are spaced from each other and thereby form corresponding annular passage openings.
  • a ventilation blind for a motor vehicle wherein this is arranged in a body opening for sucking or expelling air of an internal combustion engine.
  • Aerodynamically shaped wings of the ventilation blind are inclined inclined to the direction of the air flow and, facing the noise source, made of a sound-absorbing material, such as polyurethane sections.
  • a sound-absorbing material such as polyurethane sections.
  • chambers which act as resonators and are connected via holes with the outside atmosphere. The sound radiation initially impinges on the sound-absorbing material, where it is considerably reduced in terms of their intensity and then passed past the resonators, where they undergo a further loss of energy.
  • the surface of the components of the cover grille facing the sound-generating device should be designed as a sound absorber.
  • the sound-absorbing components of the cover grating may be formed as lamellae which have a microperforated surface at least in a region facing the sound-generating device. It is a surface that is provided with a variety of very small holes or slots. This sound-absorbing measure reduces the direct passage of sound through the grille in a frequency band of about 0.5 to 20 kHz.
  • An appropriate design of the absorber directly as components of the cover grid means that despite this effective sound insulation, the air flow remains substantially unaffected, so that the costs and the energy balance of the ventilation device does not deteriorate.
  • the generic DE 10 2008 042 727 A1 it is envisaged to increase the number of struts of the lattice rings made of lattice rings in order to reduce a so-called aeroacoustic noise, which is generated by the air flow through the lattice.
  • this change in the number of struts does not affect the sound transmitted through the grille caused by a machine connected to the duct.
  • the grille serving as a grille is provided with no soundproofing means. Instead, a sound absorbing material is provided on pivotable blades of the flow cross-section adjustment device, wherein the formation of the sound-absorbing material is not explained.
  • the sound generated by the internal combustion engine or its aggregates impinges directly on the sound-absorbing material made of foamed polyurethane, whereupon the deflected air flows past the resonators.
  • the area of the wings facing the sound source is consequently not designed as a microperforated surface, as proposed according to the invention.
  • the hole diameter of the microperforated surface may be between 0.05 mm and 0.5 mm.
  • the high damping occurs as a result of viscous friction, which is determined by the dynamic viscosity of the air.
  • the slats or the concentric structures described below are usually made slightly oblique to the air flow.
  • the reflector principle comes into play, which increases the overall effect in conjunction with the microperforated absorber.
  • the grid rings and struts should be provided with a microperforation on their surface facing the sound source.
  • the sound-absorbing components can be made of paper, foil, metal, glass or plastic.
  • the sound-absorbing component may have an internal cavity into which the fine holes or slots of the micro-perforation open. This cavity may also be filled with a fleece or foam.
  • the components can be sound-absorbing as a perforated plate structure with absorber layers and / or plate vibrators.
  • a perforated plate structure with absorber layers and / or plate vibrators.
  • the structure is designed as a sine honeycomb or hexagonal honeycomb.
  • porous absorbers can be good sound attenuation and achieve systematic effects due to the given structure.
  • With a relatively coarse-grained structure the largest noise reductions are achieved with very low losses in the volume flow.
  • a grid between 6 mm and 12 mm can be provided in the case of the use of sine honeycombs.
  • the cover grid according to the invention is provided with the sound absorber formed thereon for a cover that covers an air intake duct of a household appliance.
  • FIG. 1 shows a schematic representation of the presently essential components of a heat pump tumble dryer
  • FIG. 2 is a perspective view of a cover grille whose fins have a microperforated surface on their side facing a sound source.
  • FIG. 3 shows an opposite side of the cover grille shown in FIG. 2, likewise as a perspective view
  • Figure 5 is a perspective view of another embodiment of a
  • Cover grille in which components through which the air flows are formed as a structure with sinewaves.
  • 1 denotes a heat pump tumble dryer, in the housing 2 of which a drying drum 5 driven by an electric motor 3 via a belt drive 4 is rotatably arranged.
  • This drying drum 5 receives during its drying process in its interior to be dried laundry items 6, which come from a previous washing and spinning process, so that they are at the beginning of this drying process in a wet state.
  • the drying drum 5 is rotatably mounted in a frame, not shown, which is connected to the housing 2, stored.
  • the heat pump tumble dryer 1 a heat pump 7, which consists essentially of a first heat exchanger 8 formed as a heat sink, a second heat exchanger 9 and a compressor 10.
  • a heat pump 7 which consists essentially of a first heat exchanger 8 formed as a heat sink, a second heat exchanger 9 and a compressor 10.
  • About one Coolant circuit 1 1 are the two heat exchangers 8 and 9 and the compressor 10 lying between them connected to each other.
  • the interior of the drying drum 5 is connected via a process air channel 12 with the two heat exchangers 8 and 9 in connection, wherein within this process air duct 12, a process air blower 13 is arranged.
  • the process air is moved via this process air duct 12, the interior of the drying drum 5, the heat pump 7 and the process air blower 13 in a circuit.
  • the in the coolant circuit 1 1 between the two heat exchangers 8 and 9 promoted coolant is preferably a fluorinated hydrocarbon or a mixture of such fluorinated hydrocarbons as the commercially available preparations R 134a, R152a and R407C and is located after it in the heat sink formed as the first Heat exchanger 8 has absorbed heat from the process air, in its gaseous state, wherein it is then strongly compressed by means of the compressor 10.
  • this coolant which is in a gaseous state, then releases the heat to the process air and enters its liquid state.
  • a lint filter 14 is arranged on the outlet side of the process air stream emerging from the drying drum 5.
  • a cooling air blower 15 is provided for cooling the compressor 10, which sucks air via an intake passage 16 from a region outside the housing 2 of the heat pump dryer 1 and thus a surface of the compressor 10, which is preferably provided with cooling fins, not shown, cools.
  • This cooling air flow then passes, starting from the surface of the compressor 10, into an exhaust duct 17, which is guided in a different region of the housing 2 to the outside.
  • Both the intake duct 16 and the exhaust air duct 17 are each covered by a cover grille 18 or 18a, wherein on this according to the following figures 2 to 4 formed grille 18 or the alternative thereto according to the figure 5 illustrated below cover grille 18a, the features should be realized that are of particular interest here.
  • FIG. 2 shows a view of this cover grille 18, which shows its surface 19 facing the interior of the heat pump tumble dryer 1.
  • the grille 18 is formed substantially as a planar base member 20 with outgoing from this slats 21, which may be fixed or adjustable.
  • FIG. 3 which shows a surface 22 facing away from the first surface 19, the lamellae 21 extend at an angle to the planar base element 20, so that they release passage openings 23 each formed as slots due to this roof-shaped profile, of which FIG the perspective view of Figures 2 and 3 only one end region is visible.
  • the individual lamellae have a microperforated surface 24.
  • the entire lamellae 21, insofar as they point in the direction of the intake duct 16 or the exhaust duct 17, are provided with this microperforated surface 24.
  • the base element additionally in its webs lying between the lamellae 21 and in other areas which lie within the cross section of the intake duct 16 or the exhaust duct 17 with this microperforated surface 24.
  • FIG. 4 shows an enlarged detail of such a microperforated surface 24. Thereafter, it is a plurality of tiny openings 25, which are formed in the present case as bores.
  • the sound emanating from the compressor 10 according to FIG. 1 and transmitted via the intake duct 16 or the exhaust air duct 17 can be damped very effectively.
  • This damping occurs as a result of viscous friction, which is determined by the dynamic viscosity of the air.
  • 21 cavities may be provided within the slats, in which the tiny openings 25 open.
  • an insulating material such. B. to provide a viscose or foam.
  • FIG. 5 shows a further embodiment in which a cover grid 18a consists of a base element 25 with absorber layers 27 arranged therein which is intended to cover the cross section of the channels 16 and 17 shown schematically in FIG. Between these absorber layers 27 sinusoids 28 are arranged, the passage openings 29 form and also cause a very good sound reduction as a porous absorber. It can be produced with a relatively coarse-grained structure a very large noise reduction.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Duct Arrangements (AREA)

Abstract

L'invention concerne une grille de recouvrement (18) d'une ouverture d'entrée ou de sortie d'un canal traversé par un milieu gazeux, comportant une pluralité d'ouvertures de passage (23) formées par les éléments de construction dudit canal. Par ailleurs, le canal est relié par son extrémité opposée à la grille de recouvrement (18) à un dispositif produisant un son. L'invention vise à réaliser sur l'ouverture d'entrée ou de sortie, par des moyens présentant une construction simple et adaptés à une fabrication en grande série, un dispositif d'insonorisation, en ce que les éléments sont réalisés comme des lamelles (21) et qu'au moins une zone de la surface (19) des lamelles (21) de la grille de recouvrement (18), qui est tournée vers le dispositif produisant un son, est réalisée comme un absorbeur de son. L'invention vise à former des absorbeurs de son au moyen de surfaces microperforées (24).
PCT/EP2013/060405 2012-05-23 2013-05-21 Grille de recouvrement d'une ouverture d'entrée ou de sortie d'un canal traversé par un milieu gazeux WO2013174809A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012208621A DE102012208621A1 (de) 2012-05-23 2012-05-23 Abdeckgitter für eine Ein- oder Austrittsöffnung eines von einem gasförmigen Medium durchströmten Kanals
DE102012208621.8 2012-05-23

Publications (2)

Publication Number Publication Date
WO2013174809A2 true WO2013174809A2 (fr) 2013-11-28
WO2013174809A3 WO2013174809A3 (fr) 2014-01-16

Family

ID=48539106

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2013/060405 WO2013174809A2 (fr) 2012-05-23 2013-05-21 Grille de recouvrement d'une ouverture d'entrée ou de sortie d'un canal traversé par un milieu gazeux

Country Status (2)

Country Link
DE (1) DE102012208621A1 (fr)
WO (1) WO2013174809A2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016200308A1 (de) * 2016-01-13 2017-07-13 BSH Hausgeräte GmbH Haushaltsgerät mit Drosselung einer Lüftereinheit
DE102018212844A1 (de) * 2018-08-01 2020-02-06 BSH Hausgeräte GmbH Haushaltsgerät mit verbesserter Akustik

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3036633A1 (de) 1979-10-05 1981-04-16 Centro Ricerche Fiat S.P.A., Orbassano, Turin Schalldaempfende ventilationsjalousie
DE102008042727A1 (de) 2008-10-10 2010-04-15 BSH Bosch und Siemens Hausgeräte GmbH Lüftungsgitter für ein Haushaltsgerät und Haushaltsgerät
DE102008055088A1 (de) 2008-12-22 2010-06-24 BSH Bosch und Siemens Hausgeräte GmbH Haushaltsgerät mit einem offenen Luftkanal

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1197900A (en) * 1967-12-04 1970-07-08 Sargent S Insulations Ltd Louvres for Ventilation
US3770560A (en) * 1971-10-21 1973-11-06 American Cyanamid Co Composite laminate with a thin, perforated outer layer and cavitated bonded backing member
DE2630056A1 (de) * 1975-07-30 1977-02-17 Industrial Acoustics Co Schalldaempfer
HU182491B (en) * 1977-04-08 1984-01-30 Fuetoeber Epueletgep Termekek Sound-damping deviceparticularly for reducing noise spreading in air duct
US4260037A (en) * 1979-10-29 1981-04-07 Deere & Company Assembly for silencing engine cooling fan noise
GB2121734A (en) * 1982-05-26 1984-01-04 Ford Motor Co Motor vehicle radiator grille
DE4210279A1 (de) * 1992-03-28 1993-09-30 Turbon Tunzini Klimatechnik Quelluftdurchlaß für raumlufttechnische Anlagen
GB9300545D0 (en) * 1993-01-13 1993-03-10 Hurel Dubois Uk Ltd Carbon fibre panels
DE102005035651A1 (de) 2005-07-29 2007-02-01 BSH Bosch und Siemens Hausgeräte GmbH Schalldämpfer, insbesondere für ein Hausgerät
JP2008025233A (ja) * 2006-07-21 2008-02-07 Mk Seiko Co Ltd 消音装置
DE102009042286A1 (de) * 2009-09-22 2011-03-31 Poroson Gmbh Haushaltsgerät
DE202010004800U1 (de) 2010-04-09 2011-09-02 Stiebel Eltron Gmbh & Co. Kg Wanddurchführung für eine innen aufstellbare Wärmepumpenanlage

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3036633A1 (de) 1979-10-05 1981-04-16 Centro Ricerche Fiat S.P.A., Orbassano, Turin Schalldaempfende ventilationsjalousie
DE102008042727A1 (de) 2008-10-10 2010-04-15 BSH Bosch und Siemens Hausgeräte GmbH Lüftungsgitter für ein Haushaltsgerät und Haushaltsgerät
DE102008055088A1 (de) 2008-12-22 2010-06-24 BSH Bosch und Siemens Hausgeräte GmbH Haushaltsgerät mit einem offenen Luftkanal

Also Published As

Publication number Publication date
DE102012208621A1 (de) 2013-12-12
WO2013174809A3 (fr) 2014-01-16

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