EP0603539B1 - Hotte aspiratrice de buée avec une zone de détection acoustique - Google Patents

Hotte aspiratrice de buée avec une zone de détection acoustique Download PDF

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Publication number
EP0603539B1
EP0603539B1 EP93118457A EP93118457A EP0603539B1 EP 0603539 B1 EP0603539 B1 EP 0603539B1 EP 93118457 A EP93118457 A EP 93118457A EP 93118457 A EP93118457 A EP 93118457A EP 0603539 B1 EP0603539 B1 EP 0603539B1
Authority
EP
European Patent Office
Prior art keywords
fume extraction
extraction hood
ultrasound
extractor hood
air
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
EP93118457A
Other languages
German (de)
English (en)
Other versions
EP0603539A1 (fr
Inventor
Hans Gerd Dipl.-Ing. Keller
Peter Dipl.-Ing. Rohrbach (Fh)
Wilfried Dipl.-Ing. Rückert (FH)
Dieter Dipl.-Ing. Schmid (Fh)
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
BSH Bosch und Siemens Hausgeraete 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 Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP0603539A1 publication Critical patent/EP0603539A1/fr
Application granted granted Critical
Publication of EP0603539B1 publication Critical patent/EP0603539B1/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
    • F24C15/2021—Arrangement or mounting of control or safety systems

Definitions

  • the present invention relates to an extractor hood with an acoustic sensor section according to the first part of claim 1.
  • the present invention is based on the object, building a device on the latter prior art to provide that both structurally and also functionally favorable conditions for the acquisition the underneath the extractor hoods in their intake area prevailing conditions to capture the extractor fan unit to control.
  • the measure according to the invention offers the possibility of as an ultrasonic transmitter and ultrasonic sensor shared, on sending and receiving in a short, timely manner Arrange a sequence of switchable piezo oscillators. For switching from broadcast to reception is due enough time for the double sensor path.
  • Extractor hood is characterized in that the Reflection area for the ultrasound beam at right angles V-shaped surface structure.
  • An extractor hood as shown in the figures is for typical use above hobs suitable in kitchens. Such hobs are common essentially square and have four burners. A projection of the position of these is shown in broken lines in FIG Cooking areas 15 on the underside of the extractor hood indicated. For wider cooktops, one can be used accordingly Broadened designed extractor hood used become.
  • a motor-driven blower 3 which 4 draws in air from the room and thus creates negative pressure there and blows this air out through an outlet nozzle 5.
  • a so-called grease filter 6 completed, through which in particular during Frying and cooking processes contaminated air due to the im Room 4 prevailing negative pressure passes, the Fat and other pollution particles largely in this grease filter 6 are absorbed.
  • the room 4 is like this completed and the fat filter 6 is so in inserted a shot that as far as possible no air except over the grease filter is sucked in.
  • the extractor hood 2 can be used in so-called recirculation mode should, with the exhaust air via the outlet 5 in again the operating room is returned is within the Room 4 a carbon filter 7 can be used, which smells too is able to absorb.
  • the extractor hood is in the housing below the grease filter 6 a drawer-like pull-out 8 can be pulled out to the front arranged. In the figures, this is in the pulled out Position shown.
  • This drawer-like drawer is fixed on the front, top and on the side walls Walls.
  • At the bottom is a filter element 9 inserted. Through the twists of the drawer-like pull-out and the filter element 9 is formed a flat channel, which in the extended state of the drawer-like pull-out 8 ends open in the front area of the grease filter 6.
  • An apron 11 closes this channel 10 to the filter 6 from.
  • the grease filter 6 designed as densely and homogeneously as possible, which makes it not only offers high absorbency, but also the air has a relatively high flow resistance.
  • the fan must be correspondingly powerful, to overcome the necessary, under pressure in room 4 to produce this grease filter 6 by the air to be cleaned. In front of the filter 6, this is not available under pressure Available and so is with this extractor hood A filter element is used in the drawer-like pull-out 8 brought, which, to be flowed through at all, very is designed to be permeable. So is the absorbency this filter element 9 relatively low what however, is not only accepted, but is also desired.
  • the actual cleaning of the contaminated Air which is passed through the filter element 9 takes place in the same way as the cleaning of the otherwise suctioned Air in the main grease filter 6 it also does not need the drawer-like guides Extract 8 and its apron 11 with regard to tightness specially designed against false currents.
  • An essential one Negative pressure within the channel 10 becomes considerable due to the lack Flow resistance in the area of the filter element 9 not built up anyway.
  • the actual main filter 6 can for example in the execution by expanded metal eight to be twelve layers, whereas the filter element 9 only has two to four expanded metal layers. Thereby finds less coverage of the individual interstices the expanded metal layers instead and the permeability is so low that the air flowing through it is almost can pass through unhindered without significant pressure drop.
  • the filter element 9 fat and other dirt particles, which is easy when touching fixed Bodies fall out of the air, are absorbed these elements in this channel are essential against pollution protected. From the corresponding area of the main filter 6 are essentially the impurity components of the Filtered out air that remained mainly because of this because their willingness to fall out of the air is worse.
  • a piezo oscillator is on one side as sensor element 12 Side wall of the drawer-like pull-out 8 arranged.
  • This piezo oscillator is of a type not explained in detail Circuitry turned on that this piezo oscillator in an initial start-up phase as an ultrasonic transmitter and in a second switching phase as an ultrasonic sensor works.
  • On the opposite side of the drawer Extract 8 is a reflection area 16 for the Ultrasonic beam arranged so that this on the piezo oscillator originating from this reflected back again becomes.
  • the measuring section runs between piezo oscillator 12 and reflection area 16 in one Area which is projected onto an underlying one Hob between the front and rear hotplates runs. Both the piezo oscillator 12 and the reflection area 16 are in the drawer-like Extract 8 and its filter element 9 formed channel 10, see above that these elements are at increased risk of pollution are not exposed.
  • the reflection area is provided with V-shaped notches 17, the side flanks 18 are substantially perpendicular to each other. Thereby it is achieved that incident rays are secured again to the sending location, i.e. to the opposite piezo oscillator 12 are reflected back, with a maximum of one Offset that corresponds to the tooth pitch. Otherwise it is Alignment of the reflection area 16 on the transmitter-receiver piezo oscillator 12 not particularly problematic. A slight pivoting is irrelevant, as in the figure 4 can be seen.
  • the dash-dotted line symbolizes a vertical alignment of the reflection area 16 on the piezo oscillator 12, while the interrupted dash-dotted line symbolizes a swiveled plane.
  • the basic ultrasound beam path is through the Arrow lines 21 indicated. So while at one Design of the reflection area the incoming rays would be reflected back to the place of origin cause a smooth surface with an offset of only 1 °, that with a simple measuring distance of about 50 cm, as they certainly at least with an extractor hood, the beam is reflected back over 1.7 cm from the point of origin would.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ventilation (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Claims (3)

  1. Hotte aspiratrice de buée (2) comportant une section de capteur acoustique au-dessous de la zone d'aspiration de la hotte aspiratrice de buée pour détecter l'état de l'air dans cette zone, afin de commander le dispositif d'aération en fonction de cela, la section de capteur étant montée entre un générateur d'ultra-sons (12) et un détecteur d'ultra-sons (12), qui sont disposés de façon contiguë du même côté de la hotte aspiratrice de buée ou sont formés par un piézooscillateur pouvant commuter sur envoi et réception dans une succession temporelle courte, caractérisée en ce que sur le côté contigu de la hotte aspiratrice de buée est disposée et configurée une zone réflectrice (16) pour le faisceau d'ondes, en ce que le faisceau d'ondes est renvoyé vers le détecteur d'ultra-sons en étant structuré en surface et ainsi orienté de façon sûre.
  2. Hotte aspiratrice de buée selon la revendication 1, caractérisée en ce que la zone réflectrice (16) pour le faisceau d'ondes est structurée en surface à angles droits en forme de V.
  3. Hotte aspiratrice de buée selon la revendication 2, caractérisée en ce que le réflecteur à ultra-sons possède des rainures (17) et en ce que les surfaces utiles forment un angle de 45° par rapport à la surface réflectrice.
EP93118457A 1992-12-23 1993-11-15 Hotte aspiratrice de buée avec une zone de détection acoustique Expired - Lifetime EP0603539B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4243945A DE4243945A1 (de) 1992-12-23 1992-12-23 Dunstabzugshaube mit einer akustischen Sensorstrecke
DE4243945 1992-12-23

Publications (2)

Publication Number Publication Date
EP0603539A1 EP0603539A1 (fr) 1994-06-29
EP0603539B1 true EP0603539B1 (fr) 1999-09-01

Family

ID=6476451

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93118457A Expired - Lifetime EP0603539B1 (fr) 1992-12-23 1993-11-15 Hotte aspiratrice de buée avec une zone de détection acoustique

Country Status (3)

Country Link
EP (1) EP0603539B1 (fr)
DE (2) DE4243945A1 (fr)
ES (1) ES2137218T3 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4408278A1 (de) * 1994-03-11 1995-09-14 Gaggenau Werke Dunstabzugshaube mit wenigstens teilweiser Auslöschung des Lüftergeräusches
DE19505683A1 (de) * 1995-02-20 1996-08-22 Bosch Siemens Hausgeraete Dunstabzugshaube
DE19851884A1 (de) * 1998-11-11 2000-05-18 Diehl Stiftung & Co Ultraschall-Sensor für eine Dunstabzugshaube
DE19952618B4 (de) * 1999-10-26 2004-04-08 Institut für Luft- und Kältetechnik gemeinnützige Gesellschaft mbH Verfahren zur Bestimmung des Verschmutzungsgrades von Luftkanalsystemen

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6050297A (ja) * 1983-08-30 1985-03-19 Matsushita Seiko Co Ltd 扇風機
DE4005363A1 (de) * 1990-02-21 1991-08-22 Diehl Gmbh & Co Schaltungsanordnung zur steuerung eines luefters
DE4105807A1 (de) * 1991-02-23 1992-08-27 Diehl Gmbh & Co Schaltungsanordnung zum ein- und abschalten eines luefters

Also Published As

Publication number Publication date
EP0603539A1 (fr) 1994-06-29
DE59309759D1 (de) 1999-10-07
DE4243945A1 (de) 1994-06-30
ES2137218T3 (es) 1999-12-16

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