EP1635121A1 - Installation de hotte de ventilation - Google Patents

Installation de hotte de ventilation Download PDF

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Publication number
EP1635121A1
EP1635121A1 EP04106845A EP04106845A EP1635121A1 EP 1635121 A1 EP1635121 A1 EP 1635121A1 EP 04106845 A EP04106845 A EP 04106845A EP 04106845 A EP04106845 A EP 04106845A EP 1635121 A1 EP1635121 A1 EP 1635121A1
Authority
EP
European Patent Office
Prior art keywords
air
hood
intake opening
guide portion
slit
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
EP04106845A
Other languages
German (de)
English (en)
Other versions
EP1635121B1 (fr
Inventor
Seung-Jo Baek
Sung-Bae Song
Sang-Bum Sohn
Je-Jun Lee
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 EP1635121A1 publication Critical patent/EP1635121A1/fr
Application granted granted Critical
Publication of EP1635121B1 publication Critical patent/EP1635121B1/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
    • 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
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • 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
    • F24C15/2064—Removing cooking fumes illumination for cooking hood
    • 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 a hood ventilation system, and more particularly, to a hood ventilation system capable of effectively exhausting air containing cooking by-products generated during cooking to the outside in order to maintain comfortable indoor environments.
  • a hood ventilation system is installed over cooking appliances, heat sources, such as a microwave range, an electric oven and the like such that air containing pollutants generated during cooking of the foods in household kitchens or in restaurants can be exhausted to an external environment.
  • Figure 1 is a perspective view showing the conventional hood ventilation system
  • Figure 2 is a longitudinal sectional view showing an installation structure of the conventional hood ventilation system and its state of use.
  • the conventional hood ventilation system includes: a hood 10 installed at a support 15 such as a mounting wall so as to be placed over a cooking source 40, separating from the cooking source 40 such as a gas stove or a cooktop by a certain space; a grease filter 32 mounted at an intake opening 31 formed at an opening of the hood 10 which is opposed to an upper surface of the cooking source 40 and removing grease particles and aerosol particles generated during cooking; a blower means 22 mounted at an upper side in the hood 10 for generating intake airstreams; and an exhaust duct 21 connected at an upper portion in the hood 10 and guiding air having passed the hood 10 so that the air can be exhausted to the outside.
  • the hood 10 includes: an air collecting chamber 30 having a canopy shape that its lower area is large, its upper area is small and its inside is penetratingly formed so as to collect air; and a machinery chamber 20 extending from and communicating with an upper portion of the air collecting chamber 30, and having the blower means 22 therein communicated with the exhaust duct 21.
  • the intake opening 31 is formed at a lower surface of the air collecting chamber 30 opposed to the cooking appliance, and the grease filter 32 is mounted to stop up the entire intake opening 31.
  • the grease filter 32 is constructed to allow air to be ventilated, air generated from the cooking appliance, the heat source, is sucked into the air collecting chamber 30, and grease, aerosol cooking by-products which are included in the air are filtered by the grease filter 32.
  • the blower means 22 includes a motor (not shown) and a fan 23 connected to a rotary axis of the motor, and rotating by rotation force of the motor and generating airstreams.
  • a concentric fan is used as the fan 23.
  • the hood ventilation system is operated simultaneously with when cooking foods in the cooking source 40.
  • the motor When the power is supplied to the motor constituting the blower means 22, the motor operates to thereby rotate the fan 23 to generate airstreams by suction force.
  • air including cooking by-products produced during cooking by the cooking source 40 is carried upward by natural convection, passes the grease filter 32 by the suction force produced by the fan 23 and then is sucked into the air collecting chamber 30. Air sucked into the air collecting chamber 30 is exhausted to the outside through the fan 23 and the exhaust duct 21. In addition, when air passes the grease filter 32, the grease particles, the aerosol particles and the like are filtered through the grease filter 32.
  • the air containing the cooking by-products which are not collected within the hood flows in the room, contaminating indoor air.
  • an object of the present invention is to provide a hood ventilation system capable of efficiently exhausting air containing cooking by-products generated during cooking in order to maintain comfortable indoor environments.
  • a hood ventilation system comprising: a hood installed over a cooking source and having an intake opening at a surface of the hood opposed to the cooking source in order that air including cooking by-products generated from the cooking source can be sucked into the intake opening; a first air suction means installed in the hood and generating suction force for sucking air through the intake opening and exhausting air through an exhaust duct communicated with the first air suction means to the outside; and a second air suction means installed at the hood and generating suction force in order that air escaping from the intake opening can be introduced into the intake opening.
  • Figure 3 is a longitudinal sectional view showing a structure of a hood ventilation system in accordance with a first embodiment of the present invention
  • Figure 4 is an enlarged view showing an important part of the hood ventilation system in accordance with the first embodiment of the present invention.
  • a hood ventilation system in accordance with the first embodiment of the present invention includes: a hood 110 installed over and apart from a cooking source 140 and having an intake opening 131 at a lower surface of the hood opposed to the cooking source 140 in order that air including cooking by-products generated from the cooking source 140 can be sucked into the intake opening 131; a first air suction means 124 installed in the hood 110 and generating suction force for sucking air through the intake opening 131 and exhausting air through an exhaust duct 121 communicated with the first air suction means 124 to the outside; and a second air suction means 160 installed at the hood 110 and generating suction force in order that air escaping from the intake opening 131 can be introduced into the intake opening 131.
  • the hood 110 includes: an air collecting chamber 130 having a canopy shape that its lower part is large, its upper part is small and the inside is penetratingly formed to collect air; and a machinery chamber 120 extending from and communicating with an upper portion of the air collecting chamber 130, and having the first air suction means 124 therein communicated with the exhaust duct 121.
  • the intake opening 131 is formed at a lower surface of the air collecting chamber 130 opposed to the cooking source 140, and a filter device 132 is mounted at the intake opening 131 of the hood 110 for filtering air so as to stop up the entire intake opening 131.
  • a grease filter is mounted as the filter device 132.
  • the grease filter is constructed to allow air to be ventilated, air generated from the cooking source passes through the grease filter and then is sucked into the air collecting chamber 130, and grease, aerosol cooking by-products included in the air are filtered by the grease filter.
  • the first air suction means 124 includes a motor (not shown) and a fan connected to a rotary axis of the motor, and rotating by rotation force of the motor and generating airstreams.
  • a sirocco fan of a double suction type is used as the fan.
  • the second air suction means 160 when air, including heat, cooking by-products and the like generated during cooking, which has risen toward the intake opening 131 of the hood 110 by the action of natural convection is not sucked to the intake opening 131, and so passes a lower circumferential edge of the air collecting chamber 130 and spreads out into the room, in order to introduce the spreading air into the intake opening 131, the second air suction means 160 forms negative pressure field around an outer circumference of the intake opening 131 and thus supplies suction force in a direction of the intake opening 131. This will be described as follows.
  • the second air suction means 160 includes: a walljet channel 151 having an air suction opening 122 at its one side and a blower fan 123 installed therein for allowing air outside the hood 110 to flow in through the air suction opening 122, and formed at a wall surface of the hood in order that the air having flowed in can be sprayed through a slit 150 formed in the vicinity of the intake opening 131; and an airflow guide portion 152 extending from the slit 150 and protrudingly formed around the intake opening 131 for generating negative pressure around a surface of the airflow guide portion itself while the air sprayed from the slit 150 moves along the surface.
  • the walljet channel 151 is formed within the hood 110 along an inner wall surface of the hood by a channel forming member 154 separated from the inner wall of the hood 110 by a certain interval.
  • the airflow guide portion 152 is formed of a circular hollow member so as to be integrally connected to the airflow forming member 154.
  • a part of its outer circumferential surface predeterminedly protrudes downward with respect to the lower surface of the air collecting chamber 130 of the hood 110. That is, the protruding surface of the airflow guide portion is formed as a curved surface facing the intake opening.
  • the walljet channel 151 adjacent to the slit 150 is bent towards the airflow guide portion 152 such that the air sprayed through the slit 150 can be easily introduced to the airflow guide portion 152.
  • the walljet channel 150 is preferably formed outside the hood 110 by installing the channel forming member separated from the outer wall of the hood 100 by a predetermined interval. In addition, it also can be formed through a separate walljet channel pipe.
  • the slit 150 and the airflow guide portion 152 formed at an outlet side of the walljet channel 151 are preferably formed to encompass a circumference of the intake opening 131.
  • a light transmission window 161 is formed at the protruding surface of the airflow guide portion 152, which is provided with a lighting source 162, thereby making the surroundings of the hood bright and improving appearance.
  • Velocity of air which flows through the walljet channel 150 and is sprayed through the slit 150 is appropriately 3 to 5 m/s. This is due to following reasons. If the velocity is less than 3 m/s, negative pressure is not stably generated around a surface of the airflow guide portion 152 because of the weak coanda effect but there is a problem that the speed is low. If the velocity is more than 5 m/s, the negative pressure cannot be formed because separation of airstreams occurs at the surface of the airflow guide portion 152.
  • the hood ventilation system in accordance with the present invention is operated simultaneously with when cooking foods in the cooking source 140.
  • the motor When the power is supplied to the motor constituting the first air suction means 124, the motor operates to thereby rotate the fan to generate airstreams by suction force.
  • air including cooking by-products generated during cooking in the cooking source 140 is carried upward by convection, passes the grease filter mounted at the lower surface of the air collecting chamber 130 of the hood by the suction force produced by the first air suction means 124 to thereby filter the cooking by-products and then is sucked into the air collecting chamber 130. Air sucked into the air collecting chamber 130 is exhausted to the outside through the exhaust duct 121.
  • the second air suction means 160 operates to improve air collection efficiency through the intake opening. That is, air outside the hood flows in by the blower fan 123 installed within the walljet channel 151, flows along the walljet channel 151 and is sprayed at the proper speed through the slit 150. The sprayed air flows along the protruding surface of the airflow guide portion 152, and at this time, the negative pressure is formed around the surface by the coanda effect. Accordingly, the air containing the cooking by-products which has not been sucked into the intake opening by the suction force of the first air suction means 124 but spread out becomes flowing in a direction of the intake opening 131 by the pressure difference generated because of the negative pressure produced around the airflow guide portion 152. The air having flowed towards the intake opening flows into the hood 110 through the intake opening 131 and then is exhausted to the outside through the exhaust duct 121.
  • Figure 5 shows a hood ventilation system of the present invention in accordance with the second embodiment.
  • other constituents except for the second air suction means of the hood ventilation system in accordance with the second embodiment of the present invention are the same as those of the first embodiment, a detailed description for them will be omitted.
  • a second air suction means 180 of the hood ventilation system in accordance with the second embodiment of the present invention includes: a walljet channel 171 having one side communicating with the exhaust duct 121 such that air can flow therein from the exhaust duct 121, and formed at a wall surface of the hood 110 in order that the air having flowed therein can be sprayed through a slit 170 formed in the vicinity of the intake opening 131; and an airflow guide portion 172 extending from the slit 170 and protrudingly formed around the intake opening 131 for generating negative pressure a surface of the airflow guide portion itself while the air sprayed from the slit 170 moves along the surface.
  • the walljet channel 171 communicates with the exhaust duct 121 without using a separate blower fan as a blower source which allows air to flow through the walljet channel 171, part of air sucked through the intake opening 131 by the first air suction means 124 and exhausted through the exhaust duct 121 flows within the walljet channel 171.
  • Air flowing through the walljet channel 171 is sprayed through the slit 170 and flows towards the intake opening 131 along the protruding surface of the airflow guide portion 172. At this time, the negative pressure is formed on the surface of the airflow guide portion 172 and the ambient air is introduced to the intake opening 131 by the pressure difference.
  • the hood ventilation system of the present invention is operated simultaneously with when cooking foods in the cooking source 140.
  • the motor When the power is supplied to the motor constituting the first air suction means 124, the motor operates to thereby rotate the fan to generate airstreams by suction force.
  • air including cooking by-products generated during cooking in the cooking source 140 is carried upward by convection, passes the grease filter 123 mounted at the lower surface of the air collecting chamber 130 of the hood by the suction force produced by the first air suction means 124 to thereby filter the cooking by-products and then is sucked into the air collecting chamber 130. Air sucked into the air collecting chamber 130 is exhausted to the outside through the exhaust duct 121.
  • the second air suction means 180 operates to improve air collection efficiency through the intake opening. That is, part of air passing the exhaust duct 121 and exhausted to the outside is introduced within the walljet channel 171 communicating with the exhaust duct 21, and the introduced air passes the walljet channel 171 and then is sprayed at the proper speed through the slit 170.
  • the air sprayed through the slit 170 flows in a direction of the intake opening 131 along the protruding surface of the airflow guide portion 172.
  • negative pressure is formed around the airflow guide portion 172, which allows air which has not been sucked into the intake opening 131 by the first air suction means 124 but spread out to be introduced towards the intake opening 131 by the pressure difference of air.
  • the introduced air flows into the hood 110 through the intake opening 131 and then is exhausted to the outside through the exhaust duct 121.
  • Figures 6 and 8 are graphs showing that performance of the hood ventilation system in accordance with the present invention is analyzed using computational fluid dynamics (CFD).
  • Figure 6 is a graph showing a velocity vector field of airflow through the second air suction means of the present invention
  • Figure 7 is a graph showing a pressure field of airflow through the second air suction means of the present invention
  • Figure 8 is a graph showing an airflow locus by the second air suction means of the present invention.
  • the hood ventilation system in accordance with the present invention can improve efficiency in collecting contaminated air produced during cooking and maintain comfortable indoor environments by introducing part of air including cooking by-products, which has not been sucked into the intake opening around the and spread in the vicinity of the intake opening by the pressure difference caused by artificial generation of negative pressure, to the hood.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ventilation (AREA)
EP04106845A 2004-09-08 2004-12-22 Installation de hotte de ventilation Not-in-force EP1635121B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020040071740A KR100595568B1 (ko) 2004-09-08 2004-09-08 레인지용 후드

Publications (2)

Publication Number Publication Date
EP1635121A1 true EP1635121A1 (fr) 2006-03-15
EP1635121B1 EP1635121B1 (fr) 2011-03-02

Family

ID=35385339

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04106845A Not-in-force EP1635121B1 (fr) 2004-09-08 2004-12-22 Installation de hotte de ventilation

Country Status (3)

Country Link
EP (1) EP1635121B1 (fr)
KR (1) KR100595568B1 (fr)
DE (1) DE602004031608D1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008058761A2 (fr) * 2006-11-17 2008-05-22 Bohner Produktions Gmbh Dispositif d'aspiration de fumées
CN103383116A (zh) * 2013-05-19 2013-11-06 关云龙 装设喷射风屏装置防护面板的洁烟机
CN104329707A (zh) * 2014-05-11 2015-02-04 姚洪亮 安全易清洗抽油烟机
CN106594831A (zh) * 2016-12-16 2017-04-26 美的集团股份有限公司 射流拢烟装置及排烟装置
CN106949513A (zh) * 2017-04-11 2017-07-14 广东美的智美科技有限公司 用于形成射流的喷嘴装置及排烟装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4114329A1 (de) * 1991-05-02 1992-11-05 Standard Elektrik Lorenz Ag Dunstabzugshaube mit luftschleier
DE19911850A1 (de) * 1999-03-17 2000-09-21 Roehl Hager Hannelore Verfahren und Vorrichtung zum Eingrenzen, Erfassen und Absaugen von Schadstoffen, insbesondere bei Dunstabzugshauben
WO2003056252A1 (fr) * 2001-12-28 2003-07-10 Ecta Co., Ltd. Hotte de ventilation de cuisine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4114329A1 (de) * 1991-05-02 1992-11-05 Standard Elektrik Lorenz Ag Dunstabzugshaube mit luftschleier
DE19911850A1 (de) * 1999-03-17 2000-09-21 Roehl Hager Hannelore Verfahren und Vorrichtung zum Eingrenzen, Erfassen und Absaugen von Schadstoffen, insbesondere bei Dunstabzugshauben
WO2003056252A1 (fr) * 2001-12-28 2003-07-10 Ecta Co., Ltd. Hotte de ventilation de cuisine

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008058761A2 (fr) * 2006-11-17 2008-05-22 Bohner Produktions Gmbh Dispositif d'aspiration de fumées
WO2008058761A3 (fr) * 2006-11-17 2008-12-24 Bohner Produktions Gmbh Dispositif d'aspiration de fumées
CN103383116A (zh) * 2013-05-19 2013-11-06 关云龙 装设喷射风屏装置防护面板的洁烟机
CN104329707A (zh) * 2014-05-11 2015-02-04 姚洪亮 安全易清洗抽油烟机
CN106594831A (zh) * 2016-12-16 2017-04-26 美的集团股份有限公司 射流拢烟装置及排烟装置
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
CN106949513A (zh) * 2017-04-11 2017-07-14 广东美的智美科技有限公司 用于形成射流的喷嘴装置及排烟装置

Also Published As

Publication number Publication date
EP1635121B1 (fr) 2011-03-02
KR20060022939A (ko) 2006-03-13
DE602004031608D1 (de) 2011-04-14
KR100595568B1 (ko) 2006-07-03

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