EP0000782A1 - Système de hotte pour appareils de cuisson - Google Patents

Système de hotte pour appareils de cuisson Download PDF

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Publication number
EP0000782A1
EP0000782A1 EP7878100625A EP78100625A EP0000782A1 EP 0000782 A1 EP0000782 A1 EP 0000782A1 EP 7878100625 A EP7878100625 A EP 7878100625A EP 78100625 A EP78100625 A EP 78100625A EP 0000782 A1 EP0000782 A1 EP 0000782A1
Authority
EP
European Patent Office
Prior art keywords
air
hood
cooking surface
space
filter
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
EP7878100625A
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German (de)
English (en)
Other versions
EP0000782B1 (fr
Inventor
Duncan Elmo Overton, Jr.
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0000782A1 publication Critical patent/EP0000782A1/fr
Application granted granted Critical
Publication of EP0000782B1 publication Critical patent/EP0000782B1/fr
Expired 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S55/00—Gas separation
    • Y10S55/36—Kitchen hoods

Definitions

  • This invention relates to the capture and exhaust of smoke, grease-laden fumes, etc., emanating from cooking equipment, and particularly to hood systems positioned above a cooking surface for exhausting such fumes, smoke, etc.
  • a system for the withdrawing of cooking vapors from above a cooking surface disposed in a room or the like comprising a hood disposed above the cooking member.
  • the hood preferably has a horizontal cross-sectional'area substantially equal to the horizontal cross-sectional area of the cooking surface so that the hood substantially covers the area of the cooking surface.
  • the hood is spaced apart from the cooking surface so that there is defined between the hood and cooking surface an open space.
  • a substantial portion of the peripheral edge of the hood defines an air inlet through which air is introduced to the space between the hood and the cooking surface. The air for introduction into this space is drawn from outside the room, and preferably from the ambient atmosphere outside the building.
  • a filter within the hood and in the space between the hood and the cooking surface, there is provided a filter.at a vertical height that is less than the height of the air inlet means above the cooking surface.
  • the air introduced into the space through the air inlet is directed toward the filter.
  • the air is injected into the space along an inwardly and downwardly oriented path toward the filter. The velocity of the air entering the space is not sufficient to allow the air to reach the cooking surface before it is withdrawn from the hood through the filter by an exhaust fan.
  • the quantity of air exhausted from the hood through the filter is greater than the quantity of air entering the space between the hood and cooking surface by'at least about 10 per cent and not more than 50 per cent.
  • the panels 30 and 34 of the partition 28 are provided with a plurality of perforations 56 so that these panels define an inlet 57 for the introduction of air from outside the room 14 to the space 20 between the hood and the cooking surface 12.
  • the size of the individual perforations 56 is exaggerated for purposes of illustration. In a preferred embodiment, the individual perforations are circular and about 4.76 mm. in diameter.
  • the plenum 44 is divided into an upper portion 43 and a lower portion 45 as by an opposed blade damper 47 of the type available from Reliable Metal Peoducts of Geneva, Alabama. -By means of this damper, the incoming air flow is redirected toward the space 20 and selected portions thereof are caused to exit the plenum through the perforations in each of the panels 30 and 34. That is, more or less air is caused to exit through each panel.
  • the individual blades of the damper are adjustable in groups along the length of the damper to adjust the volume of air entering the space 20 from one end of the hood to the other end thereof.
  • a further partition 58 comprising a first panel 60 that depends from the lower surface 32 of the cover 22 generally vertically downwardly within the hood so that in combination with the cover 22 and the rear wall 24 of the hood, there is defined an exhaust plenum 62 that extends along the rear wall of the hood.
  • the bottom of this plenum 62 is closed as by one or more filters 64 that are mounted in this bottom opening.
  • the filter 64 is preferably inclined at an angle "B" with respect to the vertical so that the exposed face 65 of the filter receives thereagainst the incoming air as admixed with tempered air from the room and with entrained vapors from the cooking surface.
  • the vertical height of the perforated panels 30 and 34 of the partition 28 is greater than the vertical height of the filter 64. This positions the inlet 57 higher than the filter 64.
  • the angular disposition of these panels is chosen such that air entering through the perforations 56 in the panel 34 is directed inwardly and downwardly of the hood into the space 20 between the hood and the cooking surface and generally toward the filter 64.
  • the angular disposition of the filter 64 is such as to receive the incoming air against the face of the filter 64. Simultaneously, outside air enters the top interior area of the hood through the perforations 56 in the panel 30 to fill and sweep this area of vapors.
  • the exhaust plenum 62 is connected through an opening 64 to a duct 66, thence to an exhaust fan 68 that perferably is disposed exteriorally of the room 14 to exhaust the air from the hood to the atmosphere outside the room.
  • the system shown in the figures is a "wall-type” system in which the rear wall 24 of the hood lies against the room wall and the hood projects from the wall in a cantilevered fashion over the cooking equipment. It will be readily recognized by a person skilled in the art that two of the hood systems shown in the figures and described herein can be placed back to back and suspended from the ceiling or the like to provide an "island style" system. The function and operation of the system is identical in either the wall style or island style system, the island style merely comprising a duplication of components.
  • the present system accomplishes essentially complete entrainment of the cooking vapors without their escape into the adjacent room while minimizing the withdrawal of tempered air from the room. Contrary to the prior art devices which employ the use of "make-up" air from outside the.room, the present system does not interfere with the accessibility to the cooking surface by an employee nor does the flow of the make-up air create a discomfort to the employee.
  • these advantages are accomplished in the present system by positioning the filter, hence the exhaust outlet of the hood, relatively close to the cooking surface and at a location across the cooking surface from the.position of a user of the equipment so that the filter is relatively close to the cooking surface where the vapors are generated but out of the way of'the cooking operation and/ or the user.
  • the make-up air is introduced into the space between the hood and the cooking surface in a diffuse manner, i.e., through a plurality of perforations 56, and along a path that is oriented inwardly of the hood and downwardly across the cooking surface with the path terminating at the filter that is disposed at a lower vertical height above the cooking surface than the height of air inlet.
  • This velocity of the flow of the tempered air from the room reduces precepitiously as the distance increases away from the hood and cooking euqipment.
  • the result has been found to be an almost immediate entrainment of cooking vapors as they emanate from the cooking surface, with the entrained vapors being conveyed quickly to the filter before the greases, etc., in the vapors can cool and deposit on the walls of the hood etc. Rather, the greases are trapped in the filter as is desired and the other vapors are exhausted from the hood to the atmosphere out side the room.
  • the damper 47 by means of the damper 47, the relative quantities of air exiting the plenum 44 through the panels 30 and 34 is selectable to effect the desired air flow patterns within the space 20.
  • the selection of these air flows is accomplished in the field after installation of the system to accommodate the extant room air flow patterns and either actual or anticipated vapor generation.
  • a hood 1.8 m. in length and 1.22 m. from its front wall to its rear wall was positioned above a cooking surface with the filter of the system being spaced approximately 60.96 cm. above the cooking surface.
  • the inlet 57 for the make-up air in this embodiment comprised the panel 30 having an area of 5574.18 sq. cm., and the panel 34 having an area of 6967.73 sq. cm. The angle "A" between these two panels was 135 degrees.
  • the lower edge of the panel 34 was 104.14 cm. above the cooking surface.
  • the straight line distance between the center of the panel 34 and the center of the filter 64 was 132.08 cm.
  • the make-up inlet 46 to the plenum 44 was 30.48 cm. wide and 66.04 cm.
  • a supply fan having a capacity of about 35.68 cu. m. per minute was connected to the duct 52 to supply air to the plenum 44. It will be recognized that the velocity of the air moved into the hood by the supply fan was substantially reduced as the air entered the plenum 44 and was distributed along the length thereof prior to its exiting the plenum 44 through the perforations 56.
  • the exhaust fan 68 had a capacity of about 50.97 ⁇ m. per minute of air flow and was connected through the duct 62 to the exhaust opening 64 which was 25.4 cm. wide and 45.7 cm. long.
  • a 60.7 centimeter x 30.5 centimeter filter having an exposed face area of 1858.1 sq. cm. was mounted in the open end of the exhaust plenum at an angle "B" of 45 degrees with respect to the vertical.
  • the volume of air introduced into the space between the hood and cooking surface was about 70 per cent of the total volume of air exhausted by the exhaust fan 68'.
  • the make-up air entered the space 20 in a plurality of streams through the perforations 56 in the panels 30 and 34.
  • the perforations 56 occupied about 60 percent of the area of these two panels, each perforation being about 4.76 mm. in diameter.
  • the static pressure loss through the hood was about 2.54 cm. water gauge.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ventilation (AREA)
EP78100625A 1977-08-08 1978-08-08 Système de hotte pour appareils de cuisson Expired EP0000782B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US05/822,727 US4146017A (en) 1977-08-08 1977-08-08 Hood system for cooking equipment
US822727 1986-01-27

Publications (2)

Publication Number Publication Date
EP0000782A1 true EP0000782A1 (fr) 1979-02-21
EP0000782B1 EP0000782B1 (fr) 1981-09-30

Family

ID=25236798

Family Applications (1)

Application Number Title Priority Date Filing Date
EP78100625A Expired EP0000782B1 (fr) 1977-08-08 1978-08-08 Système de hotte pour appareils de cuisson

Country Status (3)

Country Link
US (1) US4146017A (fr)
EP (1) EP0000782B1 (fr)
DE (1) DE2861231D1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2169697A (en) * 1984-12-21 1986-07-16 Johnson Matthey Plc Cooker hoods
WO1991003330A1 (fr) * 1989-09-05 1991-03-21 Airchitect I Söderhamn Ab Hotte de ventilation du type a ejecteur

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4372195A (en) * 1980-11-17 1983-02-08 John Dorius Mass flow thermal compensator
US4346692A (en) * 1980-11-26 1982-08-31 Mccauley Lewis C Make-up air device for range hood
US4467782A (en) * 1981-08-19 1984-08-28 Russell Robert E Ventilating system for use with devices which produce airborne impurities
FI71831C (fi) * 1985-04-12 1987-02-09 Halton Oy Fraonluftsanordning.
PL1778418T5 (pl) * 2004-07-23 2014-09-30 Oy Halton Group Ltd Ulepszenie sterowania systemów wyciągowych
US20080274683A1 (en) 2007-05-04 2008-11-06 Current Energy Controls, Lp Autonomous Ventilation System
US20090061752A1 (en) 2007-08-28 2009-03-05 Current Energy Controls, Lp Autonomous Ventilation System
US8323389B2 (en) * 2008-03-24 2012-12-04 Brookman David L Kitchen hood vent and scrubber
US9574779B2 (en) 2008-04-18 2017-02-21 Oy Halton Group, Ltd. Exhaust apparatus, system, and method for enhanced capture and containment
MX2011005770A (es) 2008-12-03 2011-08-15 Halton Group Ltd Oy Sistemas y metodo para el control del flujo de evacuacion.
CN109268900B (zh) * 2018-11-18 2019-11-19 台州展兴机械股份有限公司 一种用于厨房环保油烟机的除烟机构

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3131688A (en) * 1962-10-08 1964-05-05 Gen Electric Air treatment means for domestic cooking appliances
US3285154A (en) * 1964-02-24 1966-11-15 Henry S Drive In Inc Positive direct relief means for exhaust systems
US3457850A (en) * 1967-12-11 1969-07-29 Elster S Air Conditioning Air curtain ventilator
US3530784A (en) * 1968-06-03 1970-09-29 Germain Courchesne Smoke and vapor collecting hood
DE1963456A1 (de) * 1969-12-18 1971-06-24 King Maschinen Gmbh & Co Kg Absauganlage fuer Grillstationen,Herdanlagen u.dgl.
US3941039A (en) * 1974-11-18 1976-03-02 Air Distribution Associates, Inc. Cooking fume removal
FR2301778A1 (fr) * 1975-02-24 1976-09-17 Nett Louis Appar

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3645194A (en) * 1970-03-16 1972-02-29 Willard K Ahlrich Baffled ventilating hood
US3664255A (en) * 1970-07-06 1972-05-23 Irvin R Kuechler Apparatus and method for removing fumes from the space above a cooking appliance
US3890887A (en) * 1974-01-16 1975-06-24 Elsters Inc Exhaust hood

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3131688A (en) * 1962-10-08 1964-05-05 Gen Electric Air treatment means for domestic cooking appliances
US3285154A (en) * 1964-02-24 1966-11-15 Henry S Drive In Inc Positive direct relief means for exhaust systems
US3457850A (en) * 1967-12-11 1969-07-29 Elster S Air Conditioning Air curtain ventilator
US3530784A (en) * 1968-06-03 1970-09-29 Germain Courchesne Smoke and vapor collecting hood
DE1963456A1 (de) * 1969-12-18 1971-06-24 King Maschinen Gmbh & Co Kg Absauganlage fuer Grillstationen,Herdanlagen u.dgl.
US3941039A (en) * 1974-11-18 1976-03-02 Air Distribution Associates, Inc. Cooking fume removal
FR2301778A1 (fr) * 1975-02-24 1976-09-17 Nett Louis Appar

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2169697A (en) * 1984-12-21 1986-07-16 Johnson Matthey Plc Cooker hoods
WO1991003330A1 (fr) * 1989-09-05 1991-03-21 Airchitect I Söderhamn Ab Hotte de ventilation du type a ejecteur

Also Published As

Publication number Publication date
EP0000782B1 (fr) 1981-09-30
DE2861231D1 (en) 1981-12-10
US4146017A (en) 1979-03-27

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