EP1744103A2 - Hotte d'aspiration - Google Patents

Hotte d'aspiration Download PDF

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Publication number
EP1744103A2
EP1744103A2 EP06000918A EP06000918A EP1744103A2 EP 1744103 A2 EP1744103 A2 EP 1744103A2 EP 06000918 A EP06000918 A EP 06000918A EP 06000918 A EP06000918 A EP 06000918A EP 1744103 A2 EP1744103 A2 EP 1744103A2
Authority
EP
European Patent Office
Prior art keywords
air
curved shape
shape portion
exhaust hood
air supply
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.)
Withdrawn
Application number
EP06000918A
Other languages
German (de)
English (en)
Inventor
Seung-Jo Baek
Sang-Bum Sohn
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 EP1744103A2 publication Critical patent/EP1744103A2/fr
Withdrawn legal-status Critical Current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
    • 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
    • F24C15/2071—Removing cooking fumes mounting of cooking hood
    • 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
    • F24C15/2035—Arrangement or mounting of filters
    • 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
    • F24F13/081—Air-flow control members, e.g. louvres, grilles, flaps or guide plates for guiding air around a curve
    • 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

Definitions

  • the present invention relates to an exhaust hood, and particularly, to an exhaust hood having an improved efficiency for collecting contaminated air.
  • an exhaust hood is disposed above a cooker such as a gas range or a laboratory table that generate materials causing air pollution like smoke, smells and grease vapor.
  • FIG 1 is a side sectional view that illustrates one example of an exhaust hood according to the conventional art.
  • the conventional exhaust hood includes a canopy 21 installed above a cooker 10 having a plurality of burners 11a and 11b spaced at a predetermined distance therebetween, and an exhaust part 31 communicating with the canopy 21 and upwardly protruding from the canopy 21 to a predetermined height.
  • An inlet 23 is formed at the bottom of the canopy 21, through which the polluted air including pollutants like smoke, smells and grease vapor generated from the cooker 10 is drawn in. Also, a grease filter 24 that can collect pollutants is mounted at the inlet 23.
  • An exhaust path 33 is formed in the exhaust part 31, through which the polluted air having been introduced through the inlet 23 is exhausted to the outside.
  • An exhaust fan 34 for forcibly taking in the air is installed under the exhaust path 33.
  • the polluted air including smoke, smells and grease vapor generated as burners 11a and 11b of the cooker heat food items is in a buoyancy jet form and increases in width as it ascends.
  • a method of increasing a rotation rate of the exhaust fan 34 and thusly increasing an intake force may be used.
  • the rotation rate of the exhaust fan 34 is increased to increase the intake force, the intake performance is not improved in proportion to the increased rotation force. For this reason, only the intake force of the exhaust fan 34 used in such a method is not enough to guide the polluted air, which is moved to outside along the bottom surface of the canopy 21, to the inlet 23.
  • the conventional exhaust hood cannot prevent the polluted air from moving out from the canopy 21, polluting an upper region (A) of the front side of the canopy 21 and spreading to a room to thus pollute a surrounding environment.
  • FIG 2 is a side sectional view that illustrates another example of a conventional exhaust hood.
  • the conventional exhaust hood in accordance with another example includes a hood body 51 disposed above a cooker 10 at a predetermined distance therebetween, and a nozzle part 81 installed at a front region of the hood body 51 and downwardly discharging the air.
  • the hood body 51 includes a canopy 61 installed above the cooker 10, which has a plurality of burners 11a and 11b, at a predetermined distance therebetween, and an exhaust part 71 communicating with the canopy 61 and upwardly protruding from the canopy 61 to a predetermined height.
  • the nozzle part 81 is formed at a front region of a bottom surface of the canopy 61 and discharges the air downwardly.
  • An air supply fan 83 for blowing the air to the nozzle part 81 is installed in the canopy 61.
  • a curve shape portion 85 having an arc shaped section which is convex downwardly is formed at a lower side of the front surface of the canopy 61, so that a portion of the air discharged through the nozzle part 81 can flow to a region of the inlet 63 by the so-called coanda effect.
  • the curved shape portion 85 the polluted air cannot be moved outside the canopy 61 but is guided to the inlet 63.
  • the nozzle part 81 is formed at a spot inwardly spaced apart from the front end of the canopy 61 at a predetermined distance.
  • the polluted air having ascended inside the canopy 61 can be guided to the inlet 63 by the air discharged through the nozzle part 81.
  • the method does not solve the problem that the polluted air ascending to the front end of the canopy 61 is moved out from the front end of the canopy 61 and pollutes an upper region (B).
  • an object of the present invention is to provide an exhaust hood having an improved collecting efficiency of contaminated air.
  • an exhaust hood comprising: a hood main body 110 provided with a canopy 111 having an inlet 117 and an exhaustion portion 123 connected to the canopy 111 and having an exhaustion passage 123 therein; and a nozzle unit 140 disposed at a front side of the hood main body 110, and provided with a curved shape portion 143, an air supply nozzle 141 disposed at an upper side of the curved shape portion 143 along a circumferential direction of the curved shape portion 143 for discharging air, and an air suction nozzle 141 disposed at a lower side of the curved shape portion 143 along the circumferential direction of the curved shape portion 143 for sucking air.
  • FIG. 3 is a perspective view illustrating an exhaust hood in accordance with a first embodiment of the present invention
  • Fig. 4 is a sectional view taken along the line IV-IV of Fig. 3
  • Fig. 5 is an enlarged view of a part C of Fig. 4
  • an exhaust hood in accordance with a first embodiment of the present invention may include a hood main body 110 and a nozzle unit 140 disposed at a front side of the hood main body 110 for discharging and sucking air. Arrows indicate an air flow.
  • the hood main body 110 may include a canopy 111 disposed at an upper side of a cookware 10 (refer to Fig. 1) having a plurality of burners 11a and 11b with a particular distance therebetween, and an exhaustion portion 121 connected to the canopy 111 and protruding to an upper side of the canopy 111 by a particular height.
  • the canopy 111 is formed in a rectangular plate, and provided with an inlet 117 formed at a bottom surface thereof for sucking air, and a grease filter 118 mounted in the inlet 117 for collecting contaminated materials.
  • An air supply fan 135 is installed within the canopy 111 so as to blow air to the nozzle unit 140 and simultaneously to suck air through the nozzle unit 140, and an air supply motor 136 is also disposed within the canopy 111 so as to drive the air supply fan 135.
  • An air supply passage 137 is formed at a left side of the air supply fan 135 to thus allow air blown by the air supply fan 135 to move to the nozzle unit 140.
  • the air supply passage 137 is formed horizontally along an inner upper side of the canopy 111.
  • An air suction passage 147 is formed at a lower side of the air supply motor 136 to thus allow flowing of the air sucked through the nozzle unit 140 by the air supply fan 135.
  • the air suction passage 147 is formed horizontally along an inner lower side of the canopy 111.
  • a height (h) of the air suction passage 147 is preferably 0.05 to 0.3 times as great as the diameter (D) of the curved shape portion 143 so as to suck air into the air suction passage.
  • a through hole 148 is formed at an upper portion of the air supply passage 147 to communicate the air suction passage with the air supply passage 137.
  • a filter 149 is mounted in the through hole 148 to thus remove impurities included in the air.
  • An exhaustion passage 123 is formed at an upper side of the exhaustion portion 121 to thus discharge air from which impurities are removed (filtered) by passing through the grease filter 118 to the exterior.
  • An exhaustion fan 124 for forcibly sucking air and an exhaustion motor 125 for driving the exhaustion fan 124 are mounted below the exhaustion passage 123.
  • the nozzle unit 140 may include the curved shape portion 143, an air supply nozzle 141 disposed at an upper side of the curved shape portion 143 along a circumferential direction of the curved shape portion 143 for discharging air, and an air suction nozzle 145 disposed at a lower side of the curved shape portion 143 along the circumferential direction of the curved shape portion 143 for sucking air.
  • the curved shape portion 143 has a cylindrical bar or a cylindrical pipe of which circular section has a diameter of 40 to 65 mm.
  • the curved shape portion 143 is disposed at the front side of the canopy 111.
  • the air supply nozzle 141 is separately or integrally formed at an end of the air supply passage 137, and disposed at an upper side of the curved shape portion 143 along a radius direction of the curved shape portion 143 with a gap (d1) of about 2 to 4 mm therebetween.
  • an internal angle ⁇ 1 formed between a virtual line L1 connecting an end of the air supply nozzle 141 and a center O of the curved shape portion 143 and a perpendicular line Lv passing through the center O of the curved shape portion 143 is preferably 0° to 30° in order to maximize a coanda effect.
  • a speed of air discharged (blown) through the air supply nozzle 141 is preferably 3 to 5 m/sec in order to maximize the coanda effect.
  • the air supply nozzle 145 is separately or integrally formed at an end of the air suction passage 147, and disposed at a lower side of the curved shape portion 143 along the radius direction of the curved shape portion 143 with a gap (d2) corresponding to about d1 to 3*d1 therebetween.
  • an internal angle ⁇ 3 formed between a virtual line L3 connecting an end of the air suction nozzle 145 and the center O of the curved shape portion 143 and the perpendicular line Lv passing through the center O of the curved shape portion 143 is preferably 0° to 30° in order to maximize the coanda effect.
  • the air suction nozzle 145 for sucking air therein is formed at the lower side of the curved shape portion 143, the air is separated and thus the coanda effect can continuously be maintained even at the lower side of the curved shaped portion 143 at which the coanda effect is difficult to be maintained.
  • the air having passed through the inlet 117 is integrated with the air having passed through the through hole 148 to be discharged through the air supply nozzle 141 via the air supply passage 137.
  • the air discharged through the air supply nozzle 141 by the coanda effect partially flows in an anticlockwise direction along an upper circumferential surface of the curved shape portion 143, the air forms a negative pressure region S1 having a minus (-) gauge pressure at an upper surface and a front surface of the curved shape portion 143.
  • a progressive path of the contaminated air which is intended to flow away from the exhaust hood is curved by the negative pressure region S1 and thus the air is induced back into the inlet 117.
  • the air discharged from the air supply nozzle 141 is partially sucked into the air suction passage 147 through the air suction nozzle 145 to thus continuously maintain the coanda effect. Afterwards, the air sucked into the air suction passage 147 passes through the air supply passage 137 again via the through hole 148 to thereafter be discharged through the air supply nozzle 141. Such processes are repeatedly performed. Accordingly, the contaminated air which flows toward the front region of the exhaust hood without being sucked therein can effectively be collected by being induced to the inlet 117.
  • Fig. 6 is a lateral sectional view illustrating an exhaust hood in accordance with a second embodiment of the present invention.
  • the air having passed through the grease filter 118 mounted in the inlet 117 is not supplied to the air supply nozzle 141. Rather, the air passing through the exhaustion passage 123 is partially supplied as air to be discharged through the air supply nozzle 141.
  • a reflux flow path 161 of which one end is connected to the exhaustion passage 123 and the other end is connected to the air supply passage 137 is formed within the exhaustion portion 121. Accordingly, the air supply fan 135 (refer to Fig. 4) and the air supply motor 136 (refer to Fig. 4) are not required any more, which results in a reduction of cost thereof.
  • the air discharged through the air supply nozzle 141 is partially sucked into the air suction passage 147 via the air suction nozzle 145 to thus continuously maintain the coanda effect. Afterwards, the air sucked into the air suction passage 147 flows along the air supply passage 137 again via the through hole 148, thereafter being discharged through the air supply nozzle 141. Such processes are repeatedly performed. Accordingly, the contaminated air flowing toward the front region of the exhaust hood without being sucked therein can effectively be collected by being induced to the inlet 117.
  • Fig. 7 is a lateral sectional view illustrating an exhaust hood in accordance with a third embodiment of the present invention.
  • air having passed through the grease filter 118 mounted in the inlet 117 is not supplied to the air supply nozzle 141. Rather, air having passed through a grease filter 155 mounted in an upper inlet 153 of the canopy 111 is supplied as air to be discharged through the air supply nozzle 141.
  • a filter 149 for filtering contaminated materials included in the air is mounted in the air suction passage 147 in a direction that air flows.
  • the air discharged through the air supply nozzle 141 is partially sucked into the air suction passage 147 through the air suction nozzle 145 to thus continuously maintain the coanda effect. Afterwards, the air sucked into the air suction nozzle 147 all flows into the exhaustion passage 123 through the filter 149 to be then discharged to the exterior.
  • Fig. 8 is a lateral sectional view illustrating an exhaust hood in accordance with a fourth embodiment of the present invention
  • Fig. 9 is a bottom view illustrating a canopy of Fig. 8.
  • a plurality of slits 148 are disposed at a bottom surface of the air suction passage 147 with a constant interval therebetween. Accordingly, a suction force of the exhaustion fan 124 can also be transferred to the slits 148, and thus the contaminated air of the lower side of the air suction passage 147 can be induced to the exhaustion passage 123 through the slits 148 more effectively.
  • the air discharged through the air supply nozzle 141 is partially sucked into the air suction passage 147 through the air suction nozzle 145 to thus continuously maintain the coanda effect. Afterwards, the air sucked into the air suction nozzle 147 is all induced to the exhaustion passage 123 to be then discharged to the exterior. Also, the contaminated air in the lower side of the air suction passage 147 is partially induced to the exhaustion passage 123 through the slits 148 and the filter 149 to be then discharged to the exterior.
  • Fig. 10 is a lateral sectional view illustrating an exhaust hood in accordance with a fifth embodiment of the present invention.
  • an exhaust hood in accordance with a fifth embodiment may include the nozzle unit 140 for preventing the contaminated air from flowing toward the front region of the canopy 111 without being sucked therein, and a plurality of supplementary nozzle units 170 for preventing the contaminated air from flowing toward both lateral regions of the canopy 111 without being sucked therein.
  • the supplementary nozzle unit 170 may include a lateral curved shape portion 173, a lateral air supply nozzle 171 for discharging air at an upper side of the lateral curved shape portion 173 along a circumferential direction thereof, and a lateral air suction nozzle 175 for sucking air at a lower side of the lateral curvved shape portion 173 along the circumferential direction thereof.
  • supplementary nozzle unit 170 is provided such that the contaminated air flowing toward the lateral region of the canopy 111 without being sucked therein can be collected to thus increase a collecting efficiency of the exhaust hood.
  • the exhaust hood according to the aforementioned embodiments of the present invention may have the following advantages.
  • the nozzle unit having the curved shape portion, the air supply nozzle and the air suction nozzle is provided such that the contaminated air flowing toward the front region of the exhaust hood without being sucked therein can be effectively induced to the inlet to thus be collected, thereby creating more comfortable cooking circumstances and experimental environment.
  • the air suction nozzle for sucking air is formed at the bottom side of the curved shape portion, the air is separated and thus the coanda effect can continuously be maintained even at the lower side of the curved shaped portion at which the coanda effect is difficult to be maintained. Accordingly, the collecting efficiency of the contaminated air of the exhaust hood can be increased.
  • the contaminated air flowing toward the lateral region of the exhaust hood without being sucked therein can effectively be collected, to thus enable creating of more comfortable cooking circumstances and experimental environment.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ventilation (AREA)
EP06000918A 2005-07-12 2006-01-17 Hotte d'aspiration Withdrawn EP1744103A2 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020050062895A KR100741783B1 (ko) 2005-07-12 2005-07-12 배기 후드

Publications (1)

Publication Number Publication Date
EP1744103A2 true EP1744103A2 (fr) 2007-01-17

Family

ID=37102040

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06000918A Withdrawn EP1744103A2 (fr) 2005-07-12 2006-01-17 Hotte d'aspiration

Country Status (2)

Country Link
EP (1) EP1744103A2 (fr)
KR (1) KR100741783B1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1757865A2 (fr) * 2005-08-23 2007-02-28 LG Electronics Inc. Hotte d'aspiration
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
CN105757741A (zh) * 2014-12-15 2016-07-13 布朗（上海）环境技术有限公司 厨房剩余油烟净化处理器

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9421303D0 (en) 1994-10-22 1994-12-07 Howorth Airtech Ltd Clean air system
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

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1757865A2 (fr) * 2005-08-23 2007-02-28 LG Electronics Inc. Hotte d'aspiration
EP1757865A3 (fr) * 2005-08-23 2013-07-03 LG Electronics Inc. Hotte d'aspiration
DE102007039635A1 (de) * 2007-03-20 2008-09-25 BSH Bosch und Siemens Hausgeräte GmbH Dunstabzugshaube
WO2008113664A3 (fr) * 2007-03-20 2009-08-20 Bsh Bosch Siemens Hausgeraete Hotte aspirante
CN101646904B (zh) * 2007-03-20 2011-09-07 Bsh博施及西门子家用器具有限公司 抽油烟机
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
CN105757741A (zh) * 2014-12-15 2016-07-13 布朗（上海）环境技术有限公司 厨房剩余油烟净化处理器
CN105757741B (zh) * 2014-12-15 2018-01-09 布朗（上海）环境技术有限公司 厨房剩余油烟净化处理器

Also Published As

Publication number Publication date
KR20070008002A (ko) 2007-01-17
KR100741783B1 (ko) 2007-07-24

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