EP1757870A2 - Abzugshaube - Google Patents

Abzugshaube Download PDF

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Publication number
EP1757870A2
EP1757870A2 EP06001123A EP06001123A EP1757870A2 EP 1757870 A2 EP1757870 A2 EP 1757870A2 EP 06001123 A EP06001123 A EP 06001123A EP 06001123 A EP06001123 A EP 06001123A EP 1757870 A2 EP1757870 A2 EP 1757870A2
Authority
EP
European Patent Office
Prior art keywords
air
curved shape
shape portion
air supply
nozzle
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Withdrawn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
EP06001123A
Other languages
English (en)
French (fr)
Other versions
EP1757870A3 (de
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 EP1757870A2 publication Critical patent/EP1757870A2/de
Publication of EP1757870A3 publication Critical patent/EP1757870A3/de
Withdrawn legal-status Critical Current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
    • 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
    • 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
    • F24F13/28—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
    • F24F7/00—Ventilation

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 1 b 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 121 connected to the canopy 111 and having an exhaustion passage 123; and a nozzle unit 140 disposed at a front side of the hood main body 110, and provided with a curved shape portion 141, and a nozzle 143 disposed at an upper side of the curved shape portion 141 along a circumferential direction of the curved shape portion 141 for perpendicularly discharging air down.
  • 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 a 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 air.
  • a nozzle unit 140 disposed at a front side of the hood main body 110 for discharging air.
  • Each arrow indicates an air flow.
  • the hood main body 110 may include a canopy 111 disposed at an upper side of the cookware 10 (refer to Fig. 1) with a particular distance therebetween, and an exhaustion portion 121 connected to the canopy 111 and protruding to the upper side of the canopy 111 by a particular height.
  • the canopy 111 has a rectangular plate shape, and is provided with an inlet 117 for sucking air at a lower surface of the canopy 111 and a grease filter 118 mounted in the inlet 117 for filtering contaminated materials.
  • a partition wall 131 is formed in the canopy 111 to partition an inner space of the canopy 111.
  • a suction hole 133 is formed at the partition wall 131 so as to allow air sucked through the inlet 117 and the grease filter 118 to be partially flowed into an air supply fan 135.
  • the air supply fan 135 for blowing air to the nozzle unit 140, and an air supply motor 136 for driving the air supply fan 135, and an negative ion generator 151 for generating a negative ion are all formed at a left side of the partition wall 131.
  • An air supply passage 137 is formed at a right side of the air supply fan 135 to thus induce the air blown from the air supply fan 135 to the nozzle unit 140.
  • the negative ion generator 151 may also be disposed at the air supply passage 137.
  • An upper inlet 173 for supplying external air to the air supply fan 135 is formed at an upper surface of the canopy 111.
  • a grease filter 174 for removing (filtering) the contaminated materials contained in the air is mounted in the upper inlet 173.
  • air having passed through the suction hole 133 is integrated with air having passed through the upper inlet 173 to thus be supplied to the nozzle unit 140 via the air supply passage 137. If necessary, the suction hole 133 is removed and the air may rather be supplied to the nozzle unit 140 only through the upper inlet 173, or the upper inlet 173 is removed and the air may rather be supplied to the nozzle unit 140 only through the suction hole 133.
  • An exhaustion passage 123 for discharging air from which the contaminated materials are filtered by the grease filter 118 out of the exhaust hood is formed at an upper side of the exhaustion portion 121.
  • An exhaustion fan 124 for forcibly sucking air and an exhaustion motor 125 for driving the exhaustion fan 124 are mounted at a lower side of the exhaustion passage 123.
  • the nozzle unit 140 may include a curved shape portion 141, and a nozzle 143 disposed at an upper side of the curved shape portion 141 in it circumferential direction for perpendicularly discharging air down.
  • the curved shape portion 141 has a cylindrical bar or a cylindrical pipe of which circular section has a diameter of 40 to 65 mm.
  • the curved shape portion 141 is disposed at the front side of the canopy 111 so that a perpendicular distance (h) from a center O of the curved shape portion 141 to a lower plate 111a of the canopy 111 can be 0 to D/2.
  • the nozzle 143 is disposed at the upper side of the curved shape portion so that a distance (d) between the nozzle 143 and an upper contact line P contacting with an uppermost surface of the curved shape portion 141 can be 2 to 10 mm. At this time, a speed of air discharged (blown) through the nozzle 143 may preferably be about 3 to 5 m/sec to thus maximize a coanda effect.
  • the air supply passage 137 induces the air blown by the air supply fan 135 to the nozzle 143. At this time, an end of the air supply passage 137 is bent by about 90° toward the upper contact line P of the curved shape portion 141 in order to discharge the air through the nozzle 143 in a direction perpendicular to the upper contact line P.
  • the air supply fan 135 rotates, the air having passed through the suction hole 133 is integrated with the air having passed through the upper inlet 173 to thus be perpendicularly discharged down from the upper side of the curved shape portion 141 through the nozzle 143 via the air supply passage 137.
  • the air When the air is perpendicularly discharged down from the upper side of the curved shape portion 141, the air forms a so-called injection jet, and thus the discharged air can optimally be integrated with the contaminated air. Also, a speed of air flowing along a surface of the curved shape portion 141 can be faster by the injection jet, and thus probability of occurrence of air separation at a lower side of the curved shape portion 141 may be reduced to maximize a coanda effect. As a result, the contaminated air can be collected more efficiently in the exhaust hood.
  • the discharged air flows along the upper surface of the curved shape portion 141 to form a negative pressure region S1 having a minus (-) gauge pressure at the upper surface and the front surface of the curved shape portion 141. Accordingly, a progressive path of the contaminated air which is intended to flow away from the exhaust hood can be curved toward the formed negative pressure region S1, and thus the contaminated air is induced to the inlet 117 again.
  • Fig. 6 is a lateral sectional view illustrating an exhaust hood in accordance with a second embodiment of the present invention.
  • the air passing through the exhaustion passage 123 is partially provided as air to be discharged through the nozzle 143 in the second embodiment.
  • a reflux flow path 161 of which one end is connected to the exhaustion passage 123 and the other end is connected to the nozzle 143 is formed within the canopy 111 and the exhaustion portion 121. Accordingly, the air supply fan 135 (refer to Fig. 4) and the exhaustion motor 136 (refer to Fig. 4) are not required to thus reduce the fabrication cost therefor.
  • Fig. 7 is a perspective view illustrating an exhaust hood in accordance with a third embodiment of the present invention
  • Fig. 8 is a plane view of the exhaust hood shown in Fig. 7
  • Fig. 9 is a sectional view taken along a line IX-IX of Fig. 8
  • Fig. 10 is a sectional view taken along a line X-X of Fig. 8.
  • the exhaust hood in accordance with the third embodiment may further include supplementary nozzle units 180 for preventing the contaminated air from flowing toward both lateral regions of the canopy 111 without being sucked therein as well as the nozzle unit 140 for preventing the contaminated air from flowing toward the front region of the canopy 111 without being sucked therein.
  • the supplementary nozzle unit 180 can prevent deviating and spreading of the contaminated air which flows toward each lateral region of the canopy 111 without being sucked therein.
  • an exhaustion passage 137 for inducing air toward the nozzle unit 140 is formed at one side of the air supply fan 135.
  • a lateral air supply passage 187 for inducing air toward the supplementary nozzle unit 180 is formed at the other side of the air supply fan 135.
  • the air supply fan 135 blows air to the air supply passage 137 and the lateral air supply passage 187.
  • An exhaustion motor 136 for driving the air supply fan 135 is disposed at a lower side of the air supply fan 135.
  • the supplementary nozzle unit 180 may include a lateral curved shape portion 181 and a lateral nozzle 183 disposed at an upper side of the lateral curved shape portion 181 along a circumferential direction of the lateral curved shape portion 181 for perpendicularly discharging air down.
  • the construction and operation of the lateral curved shape portion 181 and the lateral nozzle 183 of the supplementary nozzle unit 180 are the same as the curved shape portion 141 and the nozzle 143 of the nozzle unit 140 and thus the explanation therefor will be omitted.
  • the air having moved along the air supply passage 137 is discharged down through the nozzle 143 by being perpendicular to the curved shape portion 141.
  • the air having moved along the lateral air supply passage 187 is discharged down through the lateral nozzle 183 by being perpendicular to the lateral curved shape portion 181.
  • the nozzle unit 140 and the supplementary nozzle unit 180 can prevent deviating and spreading of the contaminated air flowing toward the front region and the lateral region of the canopy 111 without being sucked therein.
  • the suction hole 133 is formed at the partition wall 131 for dividing the inner space of the canopy 111 as shown in the first embodiment. Accordingly, the air having passed through the suction hole is integrated with the air having passed through the upper inlet 173 to be supplied to the nozzle unit 140 and the supplementary nozzle unit 180.
  • the reflux flow path 161 is formed within the canopy 111 and the exhaustion portion 121 and thus the air passing through the exhaustion passage 123 can partially be supplied to the nozzle unit 140 and the supplementary nozzle unit 180.
  • Fig. 11 is a perspective view illustrating an exhaust hood in accordance with a fourth embodiment of the present invention
  • Fig. 12 is a sectional view taken along the line XII-XII of Fig. 11.
  • a curved shape portion 191 of a nozzle unit 190 may be divided into a front curved shape portion 191 a and a lower curved shape portion 191 b.
  • the other parts of the exhaust hood except the curved shape portion 191 are the same as those in the first embodiment and thus the explanation therefor will be omitted.
  • the front curved shape portion 191 a has a section with a convex circular shape at the front side of the canopy 111
  • the lower curved shape portion 191 b has a section with a convex circular shape at a lower side of the canopy 111.
  • the front and lower curved shape portions 191 a and 191 b have the same diameter D, and overlap with each other.
  • the air having passed through the suction hole 133 is integrated with the air having passed through the upper inlet 173, to thus be perpendicularly discharged down from the upper side of the front curved shape portion 191a through the nozzle 193 via the air supply passage 137.
  • the discharged air flows along an outer circumferential surface of the front curved shape portion 191a to form a first negative pressure region S1 having the minus (-) gauge pressure at upper and front surfaces of the front curved shape portion 191 a. Accordingly, the progressive path of the contaminated air which is intended to pass through the exhaust hood can be curved toward the first negative pressure region S1, and thus the contaminated air is induced to the inlet 117 again.
  • the air flowing along the outer circumferential surface of the lower curved shape portion 191b via the front curved shape portion 191 a forms a second negative pressure region S2 having a minus (-) gauge pressure at the front and lower surfaces of the lower curved shape portion 191 b. Accordingly, the progressive path of the contaminated air which is intended to pass through the exhaust hood can be curved toward the second negative pressure region S2, and thus the contaminated air is induced to the inlet 117 again.
  • the curved shape portion 191 is constructed with the front and lower curved shape portions 191 a and 191b to form the second negative pressure region S2 as well as the first negative pressure region S1. Accordingly, the progressive path of the contaminated air can more effectively be induced to the inlet 117 and a collecting efficiency of the exhaust hood can thus be improved.
  • FIG. 13 is a lateral sectional view illustrating an exhaust hood according to a fifth embodiment of the present invention.
  • a perpendicular passage 195 through which the air discharged through the nozzle 193 perpendicularly passes is formed at the front curved shape portion 191a.
  • Other parts in this construction except the perpendicular passage 195 are the same as those in the fourth embodiment and thus the explanation therefor will be omitted.
  • the air having passed through the suction hole 133 is integrated with the air having passed through the upper inlet 173 and then perpendicularly discharged down from the upper side of the front curved shape portion 191 a through the nozzle 193 via the air supply passage 137.
  • the discharged air partially flows along the outer circumferential surface of the front curved shape portion 191a to form the first negative pressure region S1 having the minus (-) gauge pressure at upper and front surfaces of the front curved shape portion 191a. Accordingly, the progressive path of the contaminated air which is intended to pass through the exhaust hood can be curved toward the first negative pressure region S1, and thus the contaminated air is induced to the inlet 117 again.
  • the air flowing along the outer circumferential surface of the lower curved shape portion 191 b via the front curved shape portion 191 a forms the second negative pressure region S2 having the minus (-) gauge pressure at the front and lower surfaces of the lower curved shape portion 191b. Accordingly, the progressive path of the contaminated air which is intended to pass through the exhaust hood can be curved toward the second negative pressure region S2, and thus the contaminated air is induced to the inlet 117 again.
  • the second negative pressure region S2 may function as an air curtain by which hot air generated while cooking can be prevented from flowing toward a person who cooks.
  • the discharged air partially moves downwardly to a lower side of the front curved shape portion 191a along the perpendicular passage 195.
  • the air injected through the perpendicular passage 195 may function as an air curtain by which hot air generated while cooking can be prevented from flowing toward the person who cooks.
  • the air having passed through the suction hole 133 may be integrated with the air having passed through the upper inlet 173 and then supplied to the nozzle 193.
  • the reflux flow path 161(refer to FIG. 6) may be formed within the canopy 111 and the exhaustion portion 121 to supply the air partially passing through the exhaustion passage 123 to the nozzle unit 140.
  • the exhaust hood in accordance with the embodiments of the present invention may have the following effect.
  • the nozzle unit having the nozzle at the curved shape portion for perpendicularly discharging the air down is provided. Accordingly, the contaminated air flowing toward the front portion of the exhaust hood without being sucked therein can effectively be induced toward the inlet to thus be collected. Therefore, comfortable cooking circumstance and experimental environment can be created.
  • the contaminated air flowing toward the lateral portion of the exhaust hood without being sucked therein can effectively be induced to the inlet for collecting. Accordingly, more comfortable cooking circumstance and experimental environment can be created.
  • the second negative pressure region is formed as well as the first negative pressure region, and accordingly the contaminated air can effectively be induced to the inlet. Therefore, the collecting efficiency of the exhaust hood can be improved.
  • the air passing through the perpendicular passage can function as an air curtain by which the hot air generated while cooking can be prevented from flowing toward the person who cooks, as the second negative pressure region does. Therefore, more comfortable cooking circumstance can be created.
EP06001123A 2005-08-22 2006-01-19 Abzugshaube Withdrawn EP1757870A3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020050077007A KR100677288B1 (ko) 2005-08-22 2005-08-22 배기 후드

Publications (2)

Publication Number Publication Date
EP1757870A2 true EP1757870A2 (de) 2007-02-28
EP1757870A3 EP1757870A3 (de) 2008-11-05

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ID=37433891

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06001123A Withdrawn EP1757870A3 (de) 2005-08-22 2006-01-19 Abzugshaube

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EP (1) EP1757870A3 (de)
KR (1) KR100677288B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103591607A (zh) * 2013-10-14 2014-02-19 浙江亿田电器有限公司 一种能产生负离子的集成灶
DE102017201256A1 (de) 2017-01-26 2018-07-26 BSH Hausgeräte GmbH Dunstabzugshaube

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104879809A (zh) * 2015-05-15 2015-09-02 林德祥 一种自动甩油及净化的超低空排放油烟净化装置
KR102468343B1 (ko) * 2021-04-21 2022-11-16 설철환 배기장치

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6336451B1 (en) 1996-04-04 2002-01-08 Roehl-Hager Hannelore Process and device for confining, retaining and sucking off fumes, dust or the like

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2277373A (en) * 1993-04-20 1994-10-26 Seksun Precision Engineering P Extendible ionic cooker hood
JP2920495B2 (ja) * 1996-04-16 1999-07-19 善洋 山田 遊煙通路を備えたレンヂフード
DE19911850B4 (de) * 1999-03-17 2010-04-08 Röhl-Hager, Hannelore Verfahren und Vorrichtung zum Eingrenzen, Erfassen und Absaugen von Schadstoffen, insbesondere bei Dunstabzugshauben
DE10015666A1 (de) * 1999-12-14 2001-06-28 Georg Emanuel Koppenwallner Verfahren und Einrichtung zum Erfassen, Trennen und Absaugen von fluiden Medien unter Verwendung von Frontalwirbelgeneratoren
KR100384700B1 (ko) * 2001-06-04 2003-05-23 주식회사 엑타 주방용 배기 후드
KR100347959B1 (en) 2001-12-28 2002-08-21 Ecta Co Ltd Ventilation hood for kitchen
JP4541672B2 (ja) 2003-09-25 2010-09-08 富士工業株式会社 Ｉｈクッキングヒータ用のレンジフード
JP4495474B2 (ja) 2004-02-02 2010-07-07 富士工業株式会社 Ｉｈクッキングヒータ用のレンジフード
KR100644837B1 (ko) * 2004-11-10 2006-11-10 엘지전자 주식회사 배기후드

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6336451B1 (en) 1996-04-04 2002-01-08 Roehl-Hager Hannelore Process and device for confining, retaining and sucking off fumes, dust or the like

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103591607A (zh) * 2013-10-14 2014-02-19 浙江亿田电器有限公司 一种能产生负离子的集成灶
DE102017201256A1 (de) 2017-01-26 2018-07-26 BSH Hausgeräte GmbH Dunstabzugshaube
EP3574265B1 (de) * 2017-01-26 2022-03-23 BSH Hausgeräte GmbH Dunstabzugshaube

Also Published As

Publication number Publication date
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EP1757870A3 (de) 2008-11-05

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