EP0499802A2 - Dispositif d'evacuation des fumées - Google Patents

Dispositif d'evacuation des fumées Download PDF

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Publication number
EP0499802A2
EP0499802A2 EP19920100858 EP92100858A EP0499802A2 EP 0499802 A2 EP0499802 A2 EP 0499802A2 EP 19920100858 EP19920100858 EP 19920100858 EP 92100858 A EP92100858 A EP 92100858A EP 0499802 A2 EP0499802 A2 EP 0499802A2
Authority
EP
European Patent Office
Prior art keywords
sound
extractor hood
hood device
absorbing
absorbing means
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
EP19920100858
Other languages
German (de)
English (en)
Other versions
EP0499802A3 (en
EP0499802B1 (fr
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
Individual
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 Individual filed Critical Individual
Publication of EP0499802A2 publication Critical patent/EP0499802A2/fr
Publication of EP0499802A3 publication Critical patent/EP0499802A3/de
Application granted granted Critical
Publication of EP0499802B1 publication Critical patent/EP0499802B1/fr
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, if necessary, and a fan arranged outside of it, which is connected on the suction side via a pipe system, which serves to guide the air flow generated by the fan, to the outlet opening of the housing, the fan having sound-absorbing means is equipped to reduce the sound emitted by it.
  • 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 user's location in the pipe system of the extractor device.
  • an extractor hood is known from DE-GM 78 18 812, in which the fan is arranged outside of its collecting housing and is accommodated in a separate housing.
  • the collecting housing and the housing of the blower are connected to one another in terms of flow technology via a pipeline.
  • the housing of the blower is lined with soundproofing material in order to prevent the sound waves emitted by the blower from spreading.
  • This already achieves a certain level of sound insulation, but such an arrangement has the disadvantage that the soundproofing material is constantly exposed to the air flow generated by the blower.
  • the sucked-in air flow cannot be completely cleaned of grease particles, so that it cannot be avoided that they settle on the soundproofing material. Over time, the absorption effect of the soundproofing material is significantly impaired and eventually loses its effectiveness.
  • this arrangement has the further disadvantage that the sound emitted in the direction of the pipeline is transmitted almost undamped to the location of the user via the collecting screen. To counter this, it would be required to also line the pipeline with soundproofing material. However, such a measure would result in a significant increase in flow resistance.
  • the invention has for its object to dampen the sound emitted by the fan of an extractor device, particularly in its direction of propagation, without affecting the flow conditions and without reducing the influence of foreign particles on the soundproofing material in such a way that the sound does not reach the user as far as possible can spread out.
  • the sound-absorbing means are arranged on the suction side of the blower, outside the air flow generated by the blower, in a closed secondary duct branching off the pipe system in the main direction of propagation of the sound.
  • the inventive arrangement of the soundproofing means on the one hand prevents them from being contaminated by grease particles that may still be entrained in the air flow, and on the other hand provides noise protection that does not increase the flow resistance in the pipe system. Furthermore, blowers with higher performance without disturbing noise could also be used 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, due to the skin surface of the foam, the accumulation of foreign particles is considerably more difficult.
  • 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 produced in a mirror image perpendicular to its generatrices, 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 on its section assigned to the blower a reflector for the sound waves, which essentially prevents its propagation towards 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 is obtained 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 it is provided according to a preferred embodiment of the invention that an additional reflector is arranged in the area of the sound-absorbing means, which together with the reflector is a deflection system for the sound waves emanating from the fan on the suction side forms, which essentially prevents the propagation towards the collecting housing and at the same time is able to deflect the sound waves towards the sound-absorbing means.
  • the branching, closed secondary duct has a cranked piece that 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 is adapted by reducing devices 16 to a wall box 18 installed in 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 channel 20 is arranged at the end of the pipe system 13, which is combined with a channel part 21 generated 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 tube element 23 facing away from the tube system 13 is provided with a cap-like closure piece 24 which forms the closed secondary channel 20 and which is releasably attached to the tube 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 fan 14 in the main direction of propagation characterized by the pipe system 13 for the sound emitted by the fan 14 on the suction side.
  • 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 the latter, as is shown in detail in FIG. 1.
  • An adhesive connection has proven itself as a connection.
  • the open-cell foam serving as sound-absorbing part 26 is provided on its side facing the blower 14 with knob-like projections 28, the surface of which is covered with a smooth, continuous skin 29 which closes the open cells of the foam to make it difficult to accumulate foreign particles.
  • an open-cell polyurethane foam with a bulk density of approximately 20 kg / m3 to 30 kg / m3 and a number of knobs of approx. 1100 knobs / m2 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.
  • Angled 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 portion 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.
  • An angle of approximately 5 ° 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 bent 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)
  • Exhaust Silencers (AREA)
  • Pipe Accessories (AREA)
EP92100858A 1991-02-18 1992-01-20 Dispositif d'evacuation des fumées Expired - Lifetime EP0499802B1 (fr)

Applications Claiming Priority (2)

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

Publications (3)

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

Family

ID=6425283

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92100858A Expired - Lifetime EP0499802B1 (fr) 1991-02-18 1992-01-20 Dispositif d'evacuation des fumées

Country Status (2)

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

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100335847C (zh) * 2004-02-12 2007-09-05 熊鸿斌 排油烟通风复合消声装置
CN102466255A (zh) * 2010-10-29 2012-05-23 博西华电器（江苏）有限公司 一种吸油烟机及其进风圈
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

Families Citing this family (7)

* 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.
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
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

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0183657A1 (fr) * 1984-11-29 1986-06-04 RAINOX S.p.A. Hotte d'évacuation pour cuisine, munie d'une isolation phonique
FR2624580A1 (fr) * 1987-12-10 1989-06-16 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

Family Cites Families (1)

* 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

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0183657A1 (fr) * 1984-11-29 1986-06-04 RAINOX S.p.A. Hotte d'évacuation pour cuisine, munie d'une isolation phonique
FR2624580A1 (fr) * 1987-12-10 1989-06-16 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

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100335847C (zh) * 2004-02-12 2007-09-05 熊鸿斌 排油烟通风复合消声装置
CN102466255A (zh) * 2010-10-29 2012-05-23 博西华电器（江苏）有限公司 一种吸油烟机及其进风圈
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
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

Also Published As

Publication number Publication date
DE4104963C1 (fr) 1992-06-25
DE59208932D1 (de) 1997-11-06
EP0499802A3 (en) 1993-03-31
EP0499802B1 (fr) 1997-10-01

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