EP1672285B1 - Hotte aspirante - Google Patents

Hotte aspirante Download PDF

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Publication number
EP1672285B1
EP1672285B1 EP05027747.4A EP05027747A EP1672285B1 EP 1672285 B1 EP1672285 B1 EP 1672285B1 EP 05027747 A EP05027747 A EP 05027747A EP 1672285 B1 EP1672285 B1 EP 1672285B1
Authority
EP
European Patent Office
Prior art keywords
walljet
guiding member
main body
air
guiding
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.)
Not-in-force
Application number
EP05027747.4A
Other languages
German (de)
English (en)
Other versions
EP1672285A1 (fr
Inventor
Seung-Jo Baek
Sang-Bum Sohn
Dong-Hyun Kim
Je-Jun Lee
Hwi-Chang Son
Sung-Bae Song
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.)
LG Electronics Inc
Original Assignee
LG Electronics Inc
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 LG Electronics Inc filed Critical LG Electronics Inc
Publication of EP1672285A1 publication Critical patent/EP1672285A1/fr
Application granted granted Critical
Publication of EP1672285B1 publication Critical patent/EP1672285B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
    • F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
    • 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

Definitions

  • the present invention relates to a hood ventilation apparatus, and particularly, to a hood ventilation apparatus having a walljet device for efficiently guiding air containing cooking by-products which are exhausted to an outer circumferential surface of a hood toward a hood collecting region even using a small amount of discharged air.
  • a hood ventilation apparatus is mounted above a cooking source such as gas-ranges or electrical microwave ovens (used as a heating source) so as to exhaust air containing pollutants which are generated while cooking food at home kitchens or restaurants to an external circumference.
  • a cooking source such as gas-ranges or electrical microwave ovens (used as a heating source) so as to exhaust air containing pollutants which are generated while cooking food at home kitchens or restaurants to an external circumference.
  • a conventional hood ventilation apparatus includes a hood 10 installed on a support 15 such as a mounting wall so as to be positioned above cooking source 40 (e.g., gas-ranges or cook-tops) with a constant interval from the cooking source 40, a grease filter 32 mounted in an intake opening 31 which is formed at an inlet side of the hood 10 facing an upper surface of the cooking source 40, for filtering grease particles generated during cooking and particles in an aerosol state, a blowing unit 22 mounted in an upper side of the hood 10, for generating intake airstreams and an exhaust duct 21 connected to an upper portion of the hood 10, for exhausting air having passed through the hood 10 to the exterior.
  • cooking source 40 e.g., gas-ranges or cook-tops
  • a grease filter 32 mounted in an intake opening 31 which is formed at an inlet side of the hood 10 facing an upper surface of the cooking source 40, for filtering grease particles generated during cooking and particles in an aerosol state
  • a blowing unit 22 mounted in an upper side of the hood
  • the hood 10 includes an air collecting chamber 30 of a canopy shape which has large lower area and small upper area and of which inside is penetrated to thusly collect air therein and a machinery chamber 20 extending upwardly to an upper portion of the air collecting chamber 30 so as to be communicated therewith, and in which the blowing unit 22 communicated with the exhaust duct 21 is mounted.
  • the intake opening 31 is formed at a lower surface of the air collecting chamber 30 facing the cooking source, and the grease filter 32 is mounted to block the whole intake opening 31.
  • the grease fitter 32 is constructed such that air is ventilated. Accordingly, the air generated from the cooking source which is a heating source is sucked into the air collecting chamber 30 of the hood 10 via the grease filter 32. Grease which is contained in the air and cooking by-products in the aerosol state are filtered by the grease filter 32.
  • the blowing unit 22 includes a fan 23 connected to a motor (not shown) and a rotary shaft of the motor, for generating a flow by being rotated by a rotation force of the motor.
  • a centrifugal fan is used as the fan 23.
  • the hood ventilation apparatus is operated at the same time when food is cooked using the cooking source 40.
  • the motor When power is supplied to the motor constructing the blowing unit 22, the motor is operated.
  • the fan 23 is rotated by the operation of the motor and thus airstream is generated by a suction force.
  • the suction force of the fan 23 is lowered in inverse proportion to square of a distance on the basis of the suction surface of the air collecting chamber 30 of the hood 10, even though the suction force greatly acts on the suction surface, if the suction surface is distant from the heating source (cooking source), the air generated from the heating source may not effectively be collected into the hood.
  • a hood ventilation apparatus according to the closest prior art is represented by document EP-A-0609740 .
  • an object of the present invention is to provide a hood ventilation apparatus capable of improving collecting efficiency and cooking pleasantness by efficiently guiding pollutants exhausted to an outer circumferential surface of a hood into a hood collecting region even using a small amount of discharged air.
  • a hood ventilation apparatus according to claim 1.
  • Figs. 2 to 5 show a hood ventilation apparatus according to a first embodiment of the present invention.
  • a hood ventilation apparatus includes a hood 350 including a main body 200 installed above a cooking source such as cook-tops or gas-ranges (refer to Fig. 1 ) and having a suction opening 230 at a lower portion thereof, into which air containing cooking by-products is sucked, and an exhaust duct 300 extending to an upper side of the main body 200 and through which the sucked air is exhausted; a first blower 310 mounted in the exhaust duct 300, for generating a suction force so as to suck the air into the hood 350, a walljet guiding member 430 installed at an outer circumference of the main body 200, for allowing air from the inside of the hood 350 to flow along the surface of the walljet guiding member and a second blower 500 provided in the main body 200, for supplying air into the walljet guiding member 430.
  • a cooking source such as cook-tops or gas-ranges (refer to Fig. 1 ) and having a suction opening 230 at a lower
  • the suction opening 230 is provided with a grease filter 250 for filtering grease particles and particles in an aerosol state generated during cooking.
  • the walljet guiding member 430 may be installed at an entire region of the outer circumference of the main body 200, namely, over front portion, both lateral portions and rear portion of the outer circumference, or installed at the front portion and the both lateral portions or only at the front portion thereof.
  • the walljet guiding member 430 is installed at the front portion of the outer circumference of the main body 200.
  • One side of the main body 200 is opened.
  • One end of an upper casing 210 of the main body 200 which is visible through the opened one side is connected with an air guiding plate 411.
  • the walljet guiding member 430 is fixedly installed between the air guiding plate 401 and one end of a lower casing 220 of the main body 200 so as to form a walljet passage 401 between the air guiding plate 411 and a surface of the walljet guiding member 430.
  • a through hole 211 is formed in the upper casing 210 of the main body 200 so as to allow the second blower 500 to suck air from the exterior into the interior of the main body 200.
  • a centrifugal fan is preferably used as the second blower 500.
  • a walljet guiding frame 440 is installed in the main body 200.
  • the walljet guiding frame 440 thus covers the second blower 500 except for the opened one side of the main body 200 at which the walljet guiding member 430 is installed.
  • a amounting hole 442 for mounting the second blower 500 is formed in one surface of the walljet guiding frame 440.
  • a mounting portion 460 which covers the mounting hole 442 and in which the second blower 500 is mounted, is integrally attached to the walljet guiding frame 440.
  • a first extension plate 410 having a particular length is interposed between the air guiding plate 411 and one end of the upper casing 210 of the main body 200 and a second extension plate 420 extends from one end of the lower casing 220 of the main body 200, so that the air discharged through the walljet passage 401 by the second blower 500 flows more smoothly and the walljet guiding member 430 is fixedly installed more easily.
  • a length L from one end of the first extension plate 410 fixedly installed at one end of the upper casing 210 of the main body 200 to the end of the air guiding plate 411 is designed by considering an overall size of the hood ventilation apparatus 350.
  • Hood ventilation apparatuses with typical sizes which are currently being used preferably have the length L shorter than 70mm.
  • first extension plate 410 and the air guiding plate 411 are formed in a shape integrally extending from the upper casing 210 of the main body 200, and the second extension plate 420 can be constructed in a shape integrally extending from the lower casing 220 of the main body 200.
  • the walljet guiding member 430 is formed in an annular pipe or an annular bar.
  • the air guiding plate 411 is formed so as to have a constant curvature along the surface of the walljet guiding member 430.
  • a ratio of a height h from the lower casing 220 of the main body 200 to the center of the walljet guiding member 430 with respect to a diameter D of the walljet guiding member 430 is preferably formed to be 0 to 0.25.
  • a gap d between the walljet guiding member 430 and the end of the air guiding plate 411, which is a gap d of the walljet passage 401, is formed to be between 1.5mm and 4mm, by which an optimal walljet flow can preferably be formed.
  • an initial angle ⁇ of the walljet discharged through the walljet passage 401 must be between 30° and 60° in a direction that the walljet is discharged on the basis of a virtual vertical line 473 passing the center of the walljet guiding member 430.
  • a speed of the walljet is preferably maintained by 3 ⁇ 5m/s. For this, it is important to appropriately adjust the radius of curvature and the length of the air guiding plate 411 according to an optimal design.
  • a part of lower portion of the walljet guiding member 430 is preferably protruded downwardly lower than the lower casing 220 of the main body 20 and installed at an outer circumferential surface of the main body 200.
  • Fig. 6 shows main parts of a hood ventilation apparatus according to the second embodiment of the present invention. That is, in a hood ventilation apparatus according to the second embodiment of the present invention, as shown in Fig. 6 , a through hole 462, into which the air discharged to the exterior through first blower 310 is partially sucked by a suction force of the second blower 500, is formed at a lower surface of the mounting portion 460 in which the second blower 500 is mounted.
  • Fig. 7 shows a hood ventilation apparatus according to the third embodiment of the present invention. That is, the walljet guiding member 430 forms a constant interval b with one end of the lower casing 220 of the main body 200, more preferably, with the second extension plate 420, and accordingly a separation condition of the walljet using a boundary layer suction effect can be prevented by the interval b. At this time, air sucked into the first blower 310 can be sucked through the through hole 211 formed in the upper casing 210 of the main body 200, as shown in the first embodiment, and also can be sucked through the through hole 462 formed in the mounting portion 462, as shown in the second embodiment.
  • Fig. 8 on the other side, is a plane view of a hood ventilation apparatus according to the fourth embodiment of the present invention.
  • the walljet guiding member 430 is constructed to be installed at the front portion and the both lateral portions of the outer circumference of the main body 200.
  • a lighting lamp 450 such as a halogen lamp is installed in the walljet guiding member 430.
  • the walljet guiding member 430 is formed of a material having a transparent or translucent property which can transmit light, so as to obtain a beautiful appearance thereof when the lighting lamp 450 is operated.
  • a walljet guiding frame 570 is installed in the main body 200 so as to divide the airstream from the second blower 500 into three portions, namely, into the front portion and the both lateral portions. As a result, the air passing the second blower 500 can be easily guided toward the guiding member 430 installed at the front and the both lateral portions.
  • Figs. 9 to 11 show various modification examples of the walljet guiding member according to the present invention.
  • Fig. 9 shows a construction in which a curved guiding plate 412 is installed between the walljet guiding member 430 and the air guiding plate 411.
  • Fig. 10 shows a structure in which the walljet guiding member 431 is not formed in an annular shape but formed in a curved plate shape. Also, Fig. 10 shows a construction in which a middle guiding plate 413 having a curved shape is installed between the walljet guiding member 430 having the curved plate shape and the air guiding plate 411.
  • Fig. 11 shows a structure in which the walljet guiding member 432 is not formed in the annular shape but formed in the curved plate shape similar to Fig. 10 , and also shows a construction in which a vertical portion 411 a extends from the air guiding plate 411.
  • a middle guiding member 414 which includes a curved inner lateral surface 414a, an outer lateral surface 414b having a curved upper side and a perpendicular lower side, and a horizontal lower lateral surface 414c, is installed between the air guiding plate 411 and the walljet guiding member 432.
  • Air containing cooking by-products generated from the cooking source 40 is discharged to the exterior through the exhaust duct 300 via the suction opening 230 by a suction force of the first blower 310 installed in the exhaust duct 300 of the hood ventilation apparatus.
  • a walljet spread through the walljet passage 401 by an operation of the second blower 500 flows fast along the surface of the walljet guiding member 430, 431, or 432 by a coanda effect (a characteristic in which a fluid flows along a peripheral solid surface)
  • a negative pressure region is artificially formed at a peripheral portion of the walljet guiding member 430.
  • the walljet flows peripheral air having weak momentum into the negative pressure region.
  • Figs. 12 to 17 show results from comparing performances of the hood ventilation apparatus according to the present invention with those of the conventional hood ventilation apparatus.
  • Fig. 12 is a photo showing a result of an airstream visualization test (discharged air volume: 300CMH) when a walljet airstream is not generated in the hood ventilation apparatus according to the present invention
  • Fig. 13 is a photo showing a result of the airstream visualization test (discharged air volume: 300CMH, walljet speed: 4m/s, passage interval d: 3.0mm) when the walljet airstream is generated in the hood ventilation apparatus according to the present invention.
  • Figs. 14 and 15 show results of a CFD calculation (discharged air volume: 300CMH, walljet speed: 4m/s, passage interval d: 2.5mm) of the hood ventilation apparatus according to the present invention
  • Figs. 16 and 17 show results of the CFD calculation (discharged air volume: 300CMH, walljet speed: 4m/s, passage interval d: 2.5mm) of the conventional hood ventilation apparatus.
  • the airstream at the front side of the hood which are not collected can effectively be collected.
  • the hood ventilation apparatus by installing the walljet guiding member at the outer circumferential surface of the suction opening into which the pollutants generated from the cooking source such as cook-tops or gas-ranges are sucked, a negative pressure is formed at a peripheral portion of the walljet guiding member by the walljet flow flowing along the surface of the walljet guiding member. As a result, it is possible to collect into the suction opening the air which is spread from the cooking source, deviated from the collecting chamber, and then discharged to the outer circumference of the hood ventilation apparatus.
  • the pollutants can be prevented from being spread by collecting the pollutants into the collecting chamber of the hood ventilation apparatus even in the state that the discharged air volume is weak. Also, cooking pleasantness can be improved by restricting hot pollutants from being spread toward a face of user who is cooking.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ventilation (AREA)

Claims (16)

  1. Appareil de ventilation de hotte comprenant :
    (a) une hotte (350) incluant un corps principal (200) installé au-dessus d'une source de cuisson et ayant une ouverture d'aspiration (230) sur une surface inférieure de celle-ci, dans laquelle de l'air contenant des produits dérivés de cuisson est aspiré, et un conduit d'échappement (300) s'étendant jusqu'à un côté supérieur du corps principal (200) et évacuant l'air aspiré ;
    (b) une première soufflante (310) montée dans le conduit d'échappement (300), pour générer une force d'aspiration pour aspirer de l'air dans la hotte (350) ;
    (c) un élément de guidage de jet de paroi (430, 431, 432) installé sur une circonférence extérieure du corps principal (200), pour permettre à de l'air de l'intérieur de la hotte (350) de s'écouler le long de la surface de l'élément de guidage de jet de paroi ;
    (d) une seconde soufflante (500) prévue dans le corps principal (200) pour fournir de l'air à l'élément de guidage de jet de paroi (430) ; et
    (e) un cadre de guidage de jet de paroi (440) installé dans le corps principal (200) de sorte à couvrir la seconde soufflante (500) à l'exception de l'un côté ouvert du corps principal, sur lequel l'élément de guidage de jet de paroi (430) est installé ;
    (f) une surface latérale du corps principal est ouverte, une plaque de guidage d'air (411) est installée sur une extrémité d'un carter supérieur (210) du corps principal sur l'un côté ouvert du corps principal, l'élément de guidage de jet de paroi (430, 431, 432) est installé de manière fixe entre la plaque de guidage d'air (411) et une extrémité d'un carter inférieur (210) du corps principal, et un passage de jet de paroi (401) est formé entre la plaque de guidage d'air (411) et une surface de l'élément de guidage de jet de paroi (430, 431, 432) ; caractérisé en ce que
    (f1) dans lequel la plaque de guidage d'air (411) a un rayon de courbure constant le long de la surface de l'élément de guidage de jet de paroi (430) ou
    (f2) dans lequel une plaque de guidage médiane courbée (412, 413, 414) est en outre positionnée entre la plaque de guidage d'air (411) et l'élément de guidage de jet de paroi (430, 431, 432).
  2. Appareil selon la revendication 1, dans lequel le côté inférieur de l'élément de guidage de jet de paroi est partiellement en saillie vers le bas plus bas que le carter inférieur du corps principal de sorte à être installé sur une surface circonférentielle extérieure du corps principal.
  3. Appareil selon la revendication 1 ou 2, dans lequel une fente constante est formée entre l'élément de guidage de jet de paroi et la plaque de guidage d'air.
  4. Appareil selon la revendication 1, 2 ou 3, dans lequel l'élément de guidage de jet de paroi a une forme de tuyau annulaire et un rapport d'une hauteur du carter inférieur du corps principal au centre de l'élément de guidage de jet de paroi par rapport à un diagramme de l'élément de guidage de jet de paroi est de 0 à 0,25.
  5. Appareil selon la revendication 3, dans lequel la fente entre l'élément de guidage de jet de paroi et l'extrémité de la plaque de guidage d'air est entre 1,5 mm et 4 mm.
  6. Appareil selon l'une quelconque des revendications 1 à 5, dans lequel un trou de montage (442) pour monter la seconde soufflante est formé sur une surface du cadre de guidage de jet de paroi, et une partie de montage pour recouvrir le trou de montage et dans lequel la seconde soufflante est montée, est intégralement attachée au cadre de guidage de jet de paroi.
  7. Appareil selon la revendication 6, dans lequel la partie de montage a un trou débouchant, dans lequel de l'air évacué vers l'extérieur à travers la première soufflante s'écoule en partie vers l'intérieur par une force d'aspiration de la seconde soufflante.
  8. Appareil selon l'une quelconque des revendications 1 à 7, dans lequel un trou débouchant est formé dans le carter supérieur du corps principal, et ainsi de l'air est aspiré du trou débouchant par la seconde soufflante.
  9. Appareil selon l'une quelconque des revendications 1 à 8, dans lequel l'air aspiré dans l'ouverture d'aspiration par la première soufflante est en partie fourni à l'élément de guidage de jet de paroi par la seconde soufflante.
  10. Appareil selon l'une quelconque des revendications 1 à 9, dans lequel l'élément de guidage de jet de paroi est un tuyau annulaire, un angle initial d'un jet de paroi évacué à l'un côté ouvert du corps principal est entre 30° et 60° dans une direction dans laquelle le jet de paroi est évacué sur la base d'une ligne perpendiculaire virtuelle passant le centre de l'élément de guidage de jet de paroi, et une vitesse du jet de paroi est entre environ 3 et 5 m/s.
  11. Appareil selon l'une quelconque des revendications 1 à 10, dans lequel l'élément de guidage de jet de paroi est positionné sur une partie avant d'une circonférence extérieure du corps principal.
  12. Appareil selon l'une quelconque des revendications 1 à 11, dans lequel l'élément de guidage de jet de paroi est installé sur la partie avant et les deux parties latérales de la circonférence extérieure du corps principal.
  13. Appareil selon l'une quelconque des revendications 1 à 12, dans lequel l'élément de guidage de jet de paroi est formé d'un matériau qui peut transmettre de la lumière et a une lampe s'allumant à l'intérieur de celui-ci.
  14. Appareil selon l'une quelconque des revendications 1 à 13, dans lequel une fente constante est formée entre l'élément de guidage de jet de paroi et une extrémité du carter inférieur du corps principal.
  15. Appareil selon l'une quelconque des revendications 1 à 14, dans lequel la seconde soufflante est un ventilateur centrifuge.
  16. Appareil selon l'une quelconque des revendications 1 à 15, dans lequel l'élément de guidage de jet de paroi est formé en une forme de plaque courbée (431, 432).
EP05027747.4A 2004-12-20 2005-12-19 Hotte aspirante Not-in-force EP1672285B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020040108799A KR100608704B1 (ko) 2004-12-20 2004-12-20 주방용 후드의 월제트 배기장치

Publications (2)

Publication Number Publication Date
EP1672285A1 EP1672285A1 (fr) 2006-06-21
EP1672285B1 true EP1672285B1 (fr) 2017-03-22

Family

ID=35781382

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05027747.4A Not-in-force EP1672285B1 (fr) 2004-12-20 2005-12-19 Hotte aspirante

Country Status (4)

Country Link
EP (1) EP1672285B1 (fr)
KR (1) KR100608704B1 (fr)
CN (1) CN100432545C (fr)
AU (1) AU2005244606B2 (fr)

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KR100741786B1 (ko) * 2005-08-23 2007-07-24 엘지전자 주식회사 배기 후드
DE102007039635A1 (de) * 2007-03-20 2008-09-25 BSH Bosch und Siemens Hausgeräte GmbH Dunstabzugshaube
DE102007039633A1 (de) * 2007-08-22 2009-02-26 BSH Bosch und Siemens Hausgeräte GmbH Gehäuse einer Dunstabzugshaube mit einem Luftaustrittsspalt
DE102007039634A1 (de) * 2007-08-22 2009-02-26 BSH Bosch und Siemens Hausgeräte GmbH Gehäuse einer Dunstabzugshaube
KR101486268B1 (ko) * 2013-01-01 2015-01-28 진남기 각종 국소배기 후드 흡인장치
CN106594831B (zh) * 2016-12-16 2019-04-30 美的集团股份有限公司 射流拢烟装置及排烟装置
CN106765389B (zh) * 2016-12-20 2019-07-02 美的集团股份有限公司 排烟装置
CN114763918B (zh) * 2021-01-11 2023-07-25 宁波方太厨具有限公司 一种吸油烟机及其控制方法

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IT1262058B (it) * 1993-02-03 1996-06-19 Valcucine Spa Cappa di aspirazione per cucine
DE19613513A1 (de) 1996-04-04 1997-10-09 Roehl Hager Hannelore Verfahren zum Eingrenzen, Erfassen und Absaugen von Dunst, Staub oder dergleichen sowie Einrichtung zur Durchführung des Verfahrens
KR100384700B1 (ko) 2001-06-04 2003-05-23 주식회사 엑타 주방용 배기 후드
JP2004077073A (ja) 2002-08-21 2004-03-11 Fuji Industrial Co Ltd レンジフードファン

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Also Published As

Publication number Publication date
CN100432545C (zh) 2008-11-12
CN1811279A (zh) 2006-08-02
AU2005244606A1 (en) 2006-07-06
AU2005244606B2 (en) 2007-07-12
KR20060070152A (ko) 2006-06-23
KR100608704B1 (ko) 2006-08-08
EP1672285A1 (fr) 2006-06-21

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