EP0499802B1 - Dunstabzugsvorrichtung - Google Patents

Dunstabzugsvorrichtung Download PDF

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Publication number
EP0499802B1
EP0499802B1 EP92100858A EP92100858A EP0499802B1 EP 0499802 B1 EP0499802 B1 EP 0499802B1 EP 92100858 A EP92100858 A EP 92100858A EP 92100858 A EP92100858 A EP 92100858A EP 0499802 B1 EP0499802 B1 EP 0499802B1
Authority
EP
European Patent Office
Prior art keywords
sound
extraction device
vapour extraction
blower
pipe
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
EP92100858A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0499802A3 (en
EP0499802A2 (de
Inventor
Kurt Dipl.-Ing. Deppert
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.)
BSH Hausgeraete GmbH
Original Assignee
Bosch Siemens Hausgerate 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 Bosch Siemens Hausgerate GmbH filed Critical Bosch Siemens Hausgerate GmbH
Publication of EP0499802A2 publication Critical patent/EP0499802A2/de
Publication of EP0499802A3 publication Critical patent/EP0499802A3/de
Application granted granted Critical
Publication of EP0499802B1 publication Critical patent/EP0499802B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/20—Removing cooking fumes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
    • B08B15/02—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area using chambers or hoods covering the area

Definitions

  • the invention relates to an extractor device with a filter housing and optionally a fan arranged outside of this, the suction side via a pipe system, which serves to guide the air flow generated by the fan, fluidically connected to the outlet opening of the collecting housing, in a branching, closed Auxiliary duct of the pipe system is provided with sound-absorbing means for reducing the sound generated by the blower.
  • the blower causing the noise is no longer assigned to the housing of the extractor hood, but instead the source of the noise is located as far as possible from the location of the user in the piping system of the extractor device.
  • an extractor hood is known from DE-GM 78 18 812, in which the fan is arranged outside its collecting housing and is accommodated in a separate housing.
  • the collecting housing and the housing of the blower are fluidly connected to one another via a pipeline.
  • the housing of the blower is lined with soundproofing material and the propagation of the sound waves emitted by the blower is changed.
  • the grease filter arranged in the collecting housing the sucked-in air flow cannot be completely cleaned of grease particles, so that it cannot be avoided that the grease particles settle on the soundproofing material. Over time, the absorption effect of the soundproofing material is significantly impaired and eventually loses its effectiveness.
  • Another extractor device with a fan arranged outside its collecting housing is known from FR-A-26 24 580.
  • the sound-absorbing means are arranged in a branching, closed secondary duct of the pipe system and are essentially flush with the pipe wall of the pipe system having the secondary duct.
  • Such an arrangement of the sound-absorbing means is also exposed to the air flow sucked in by the blower, so that the fat particles entrained in the air flow can settle on the sound-absorbing means and thus lose their effectiveness over time.
  • the invention has for its object to dampen the sound emitted by the fan of an extractor device, especially in its direction of propagation, without impairing the flow conditions and without reducing the influence of foreign particles on the soundproofing material so that the sound does not reach the user if possible can spread out.
  • the sound-absorbing means are arranged outside the air flow generated by the fan in the secondary duct set back in the main direction of propagation of the sound.
  • the recessed arrangement of the soundproofing means in a secondary duct prevents contamination of the soundproofing means by grease particles which may be entrained in the air flow, so that permanent sound insulation is provided which also does not increase the flow resistance in the pipe system. Furthermore, blowers with higher performance can also be used without disturbing noise in order to increase the suction effect on the collecting housing.
  • Sound insulation is particularly effective if, according to a preferred embodiment of the invention, it is provided that the sound-absorbing means have a sound-absorbing part on a sound-reflecting part.
  • the sound-absorbing part is arranged closer to the suction side of the blower than the sound-reflecting part.
  • the main advantage of such a solution is that the material thickness of the sound-absorbing part can be reduced, since the sound waves still remaining after the first impact on the absorber are returned to the sound-absorbing part after their reflection on the sound-reflecting part.
  • Sound-absorbing means are particularly space-saving in terms of their construction and are easy to install if, according to a preferred embodiment of the invention, it is provided that the sound-absorbing part and the sound-reflecting part form a unit and are connected to one another.
  • the sound-absorbing part and the sound-reflecting part are successively arranged at a distance from one another.
  • Such a possible solution is characterized in that the materials for the sound-absorbing part and the sound-reflecting part can be coordinated independently of one another depending on the sound frequency to be damped.
  • the sound-absorbing part consists of an open-cell foam, the surface of which is digested and that the surface of the foam facing the blower is provided with nub-like approaches.
  • This embodiment shows the advantages that it has a particularly sound-absorbing effect and the accumulation of foreign particles is considerably more difficult due to the skin surface of the foam.
  • Sound waves are reflected particularly well when they strike the sound-reflecting part if, according to a preferred embodiment of the object of the invention, it is provided that it consists of sound-hard material.
  • the secondary duct is combined with a duct part which is produced in a mirror image perpendicular to its surface lines, represents a continuous piece of pipe which is fluidically connected to a pipe socket directed towards the collecting housing and forms an essentially T-shaped pipe element , with the mirror axis serving as the center line for the pipe socket.
  • a solution according to these features has the advantage that the tubular element is well suited and usable for both right and left connection.
  • the tubular element has a reflector for the sound waves on its section assigned to the blower, which essentially prevents its propagation to the collecting housing and which can deflect the sound waves towards the sound-absorbing means.
  • Such a solution is characterized in that a focusing effect for the sound waves towards the sound-absorbing means is achieved with simple constructional means.
  • a reflector is particularly expedient if, according to an advantageous embodiment of the object of the invention, it is provided that it is formed by a bend and is optionally arranged on one of the channel walls of the tubular element.
  • a fluidically favorable variant for the reflector results if, according to a preferred embodiment of the invention, it is provided that the bend serving as a reflector is provided with a radius at its apex.
  • a particularly high noise reduction in an extractor device is achieved if, according to a preferred embodiment of the invention, it is provided that an additional reflector is arranged in the area of the sound-absorbing means, which together with the reflector forms a deflection system for the sound waves emanating from the blower, which forms the This essentially prevents the housing from spreading and at the same time is able to deflect the sound waves towards the sound-absorbing means.
  • the branching off, closed secondary duct has a cranked piece which is able to absorb the sound-absorbing means.
  • T-shaped pipe element in the region of the confluent pipe socket to the secondary duct is equipped with air guiding devices which are able to largely prevent vortex formation at the confluence.
  • the pipe element is detachably connected to the pipe system.
  • the embodiment is not only characterized in that the pipe system is easily accessible for cleaning purposes after dismantling the pipe element, but also in that the pipe element itself is easy to clean and assemble.
  • the soundproofing means can be exchanged particularly easily if, according to a preferred embodiment of the object of the invention, it is provided that the soundproofing means are arranged in a closure piece, which forms the end of the secondary duct and is releasably connected to this, and is made of possibly soundproof material.
  • An extractor device designated by 10 in FIG. 1 has an umbrella-like collecting housing 11, optionally equipped with filter devices, whose outlet opening opposite the suction surface is connected by an intermediate piece 12 to a rectangular pipe system 13 composed of several sections.
  • the blower box 15 On the pressure side of the blower 14, the blower box 15 is adapted by reducing devices 16 to a wall box 18 built into an indicated masonry 17, which is provided on its side facing away from the blower box 15 with a blind-like grille 19.
  • a secondary duct 20 is arranged at the end of the pipe system 13, which is combined with a duct part 21 which is produced in a mirror image perpendicular to its surface lines, represents a continuous piece of pipe which is fluidically connected to a pipe socket 22 directed towards the collecting housing 11 and is essentially T -shaped tube element 23 forms, the mirror axis serving as the center line for the tube socket 22.
  • the T-shaped pipe element 23 is detachably connected to the rest of the pipe system 13 using fastening means, not shown.
  • the pipe socket 22 arranged on the pipe element 23 can also be arranged offset off-center to one of the longitudinal walls of the pipe element 23.
  • the end face of the T-shaped pipe element 23 facing away from the pipe system 13 is provided with a cap-like closure piece 24, which forms the closed secondary channel 20, and which is detachably fastened to the pipe element 23 with fastening means, also not shown. Its interior is equipped with sound-absorbing means 25, which lie outside the air flow generated by the blower 14 in the main direction of propagation characterized by the pipe system 13 for the sound emitted by the blower 14.
  • the sound-absorbing means 25 have a sound-absorbing part 26 and a sound-reflecting part 27, the distance between the sound-reflecting part 27 and the suction side of the blower 14 being greater than that of the sound-absorbing part 26 (as can also be seen in FIG. 2).
  • the sound-reflecting part 27 made of sound-hard material can also be formed by the closure piece 24, so that the additional part 27 can be saved.
  • the sound-absorbing part 26 forms a unit with the sound-reflecting part 27 and is connected to it, as is shown in detail in FIG. 1.
  • An adhesive connection has proven itself as a connection.
  • the open-cell foam serving as the sound-absorbing part 26 is nubby on its side facing the blower 14 Approaches 28 equipped, the surface of which is covered with a smooth, continuous skin 29 which closes the open cells of the foam, in order to make it difficult for any foreign particles to accumulate.
  • an open-cell polyurethane foam with a bulk density of approximately 20 kg / m 3 to 30 kg / m3 and a number of nubs of approx. 1100 nubs / m 2 was successfully tested.
  • the T-shaped tubular element 23 has on its section assigned to the blower 14 a reflector 30 for the sound waves, which essentially prevents its propagation to the collecting housing 11 and which points the sound waves to the sound-absorbing means 25 can distract.
  • An angle in a channel wall 31 of the tubular element 23 serves as the reflector 30, which can optionally be equipped with a radius in its apex 32 to reduce turbulence.
  • the angled serving as reflector 30 is arranged so that the channel widens towards the fan.
  • the transition from the apex 32 of the reflector to the pipe socket 22 is fluidically optimized in several straight sections in order to create a so-called "soft transition".
  • an additional reflector 33 is formed by a beveling of the secondary duct 20 directed towards the pipe socket 22, which together with the reflector 30 forms a deflection system for the sound waves emanating from the fan on the suction side forms. This essentially prevents the propagation of the sound waves towards the collecting housing 11 and at the same time deflects the sound waves towards the sound-absorbing means 25.
  • An angle of approximately 5 ° with respect to the horizontal has proven to be effective as the inclination for the additional reflector 33. It is also conceivable to insert the additional reflector 33 as an insert into the secondary duct 20.
  • the secondary duct 20 it would also be conceivable for it to have a cranked piece which is able to accommodate the sound-absorbing means 25.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Duct Arrangements (AREA)
  • Pipe Accessories (AREA)
  • Exhaust Silencers (AREA)
EP92100858A 1991-02-18 1992-01-20 Dunstabzugsvorrichtung Expired - Lifetime EP0499802B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4104963A DE4104963C1 (enrdf_load_stackoverflow) 1991-02-18 1991-02-18
DE4104963 1991-02-18

Publications (3)

Publication Number Publication Date
EP0499802A2 EP0499802A2 (de) 1992-08-26
EP0499802A3 EP0499802A3 (en) 1993-03-31
EP0499802B1 true EP0499802B1 (de) 1997-10-01

Family

ID=6425283

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92100858A Expired - Lifetime EP0499802B1 (de) 1991-02-18 1992-01-20 Dunstabzugsvorrichtung

Country Status (2)

Country Link
EP (1) EP0499802B1 (enrdf_load_stackoverflow)
DE (2) DE4104963C1 (enrdf_load_stackoverflow)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4326837A1 (de) * 1993-08-10 1995-02-16 Paul Schacht Absaugvorrichtung
FR2720616B1 (fr) * 1994-06-02 1996-12-27 Gouffault Sa Atelier Dispositif aspirateur de fumées de cierges de dévotion.
CN100335847C (zh) * 2004-02-12 2007-09-05 熊鸿斌 排油烟通风复合消声装置
US7431127B2 (en) * 2004-09-21 2008-10-07 Durr Systems, Inc. Compact noise silencer for an air blower
DE102005014222B3 (de) * 2005-03-30 2006-08-31 Robert Bosch Gmbh Heizeinrichtung
CN102466255B (zh) * 2010-10-29 2015-09-30 博西华电器（江苏）有限公司 一种吸油烟机及其进风圈
CN102901131A (zh) * 2011-07-30 2013-01-30 丁德厚 一种分体式家用电动吸油烟机的通用机芯
CN102974586A (zh) * 2011-09-02 2013-03-20 田菱精细化工（昆山）有限公司 三辊机用收集风罩
DE102013100271A1 (de) * 2013-01-11 2014-07-17 Miele & Cie. Kg Dunstabzugshaube
CN109959036A (zh) * 2017-12-14 2019-07-02 博西华电器（江苏）有限公司 用于油烟机的空气净化控制方法、装置及油烟机

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7818812U1 (de) * 1978-06-23 1978-11-16 Gutmann, Rudolf, 7130 Muehlacker Dunstabzugshaube
IT8423921V0 (it) * 1984-11-29 1984-11-29 Rainox Spa Cappa perfezionata per cucine componibili, provvista, intorno al vano di alloggiamento del gruppo motore-ventola, di un'ampia zona periferica con una superficie rivestita in materiale particolarmente adatto a garantire un ottimo assorbimento acustico.
FR2624580B1 (fr) * 1987-12-10 1990-02-09 Aldes Caisson de liaison entre des conduits horizontaux et verticaux d'une installation de ventilation mecanique d'un batiment, equipe de moyens d'absorption acoustique

Also Published As

Publication number Publication date
DE59208932D1 (de) 1997-11-06
EP0499802A3 (en) 1993-03-31
EP0499802A2 (de) 1992-08-26
DE4104963C1 (enrdf_load_stackoverflow) 1992-06-25

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