US20110171898A1 - Exhaust Hood - Google Patents

Exhaust Hood Download PDF

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Publication number
US20110171898A1
US20110171898A1 US13/119,774 US200913119774A US2011171898A1 US 20110171898 A1 US20110171898 A1 US 20110171898A1 US 200913119774 A US200913119774 A US 200913119774A US 2011171898 A1 US2011171898 A1 US 2011171898A1
Authority
US
United States
Prior art keywords
fan wheel
fan
exhaust hood
air
venting passages
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.)
Abandoned
Application number
US13/119,774
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English (en)
Inventor
Udo Berling
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.)
BERLING GmbH
Original Assignee
BERLING GmbH
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 BERLING GmbH filed Critical BERLING GmbH
Assigned to BERLING GMBH reassignment BERLING GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BERLING, UDO
Publication of US20110171898A1 publication Critical patent/US20110171898A1/en
Abandoned 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
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/10—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
    • F28D7/106—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically consisting of two coaxial conduits or modules of two coaxial conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0025—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being formed by zig-zag bend plates

Definitions

  • the present invention concerns an exhaust hood with a first fan wheel for sucking in and transporting away room air and a number of guide vanes arranged externally about the fan wheel for directional deflection of the airflow that is exiting from the first fan wheel.
  • the publication DE 10 2005 033 224 A1 discloses the use of a heat exchanger in an exhaust hood.
  • the heat exchanger is used in order to either heat cold air coming in from the exterior by means of the outflowing warmer room air in order to avoid heat losses or the cooled room air that is blown out to the exterior is used in order to cool the incoming hot air to the lower room temperature. Both applications serve to reduce energy losses from the building that are caused by venting.
  • the object is solved for an exhaust hood of the aforementioned kind in that in the exhaust hood a second fan wheel for sucking in external air is arranged axially displaced relative to the first fan wheel and the air flows that are exiting from the first and second fan wheels are guided past each other, separate from each other, through guide vanes that are embodied as a cavity and form venting passages, wherein the walls of the guide vanes each form a surface for heat exchange between the two air flows.
  • a heat exchange is enabled. Since a plurality of guide vanes within the exhaust hood are provided in order to obtain a high degree of separation, the surfaces of these guide vanes together also form a large surface area by means of which a heat exchange can be realized. Because of the comparatively high flow velocity of the room air through the exhaust hood and the usually short transport paths of the room air from the exhaust hood to the exit opening in a building wall, the heat exchange that is generally possible in conventional exhaust hoods is very limited. By utilizing the surfaces of the guide vanes as a kind of cross-flow heat exchanger, the theoretically possible heat exchange action is significantly increased.
  • the cold air can be heated with energy that is removed from the hot air through the wall and the hot air is cooled, depending on in which direction the heat exchange is to be realized.
  • the heat transmission coefficient of the exhaust hood increases because of the parallel conveying stretch.
  • a plurality of air guiding passages can be provided that are arranged adjacent to each other and that, across the common walls and their surfaces, can exchange energy.
  • at least some of the guide vanes in the area of the second fan wheel must be embodied as a cavity in order to enable a separate cross-over guiding of the air flows past each other.
  • the guide vanes in the area of the first fan wheel are embodied as a cavity depends on where the external air is to exit from the exhaust hood and which surfaces are to be utilized for heat transfer. The greater the surface areas available for heat transfer, the more heat can thus be exchanged between the air flows that cross each other.
  • venting passages correlated with first and second fan wheels parallel and adjacent to each other within the exhaust hood without additional deflection means having to be provided. Because of the minimal flow direction deflections, the venting passages create a comparatively low counterpressure so that the energy consumption for the operation of the fan wheels for generating a certain air conveying quantity will decrease.
  • the fan wheels and the components of the venting passages so as to be easily removable so that, for example, for cleaning purposes, they can be removed quickly. It is advantageous to design the components with regard to their dimensions such that they can be fitted into a basket of a conventional dishwasher.
  • the venting passages for room air discharge and external air supply are arranged annularly and externally about the fan wheels; the venting passages correlated with the first fan wheel have a height that extends into the area of the second fan wheel but have at the fan wheel side only one opening relative to the first fan wheel, and the venting passages correlated with the second fan wheel have a height that extends into the area of the first fan wheel but have at the fan wheel side only one opening relative to the second fan wheel.
  • the first and the second fan wheels are separated from each other by a partition that is arranged between them and that separates the correlated air flows from each other.
  • the partition enables an optimization of the respective air flows in the area of the respective fan wheels.
  • At least the walls of the venting passages correlated with the first fan wheel have an extension that is curved in radial direction toward the fan wheel. Because of the curvature of the venting passage in a direction radial relative to the fan wheel the air flow is deflected. The defection, when the guide vanes of the fan wheels are designed appropriately, can lead to slowing of the airflow with simultaneous increase of the air pressure.
  • the slowing effect leads to a movement path of particles that are moved within the air flow and that have a relative density that is different from that of air that differs from the flow path of the air that is passing through this area, it is possible to utilize the walls of the venting passage in order to catch the particles moved within the air flow, for example, oils or grease from cooking vapors, in that they collide with the surface of the wall and adhere thereto until they are removed in a later cleaning action.
  • the particles are caught in a zone that is close to the fan wheels and therefore still in an area that is easily accessible, in particular, when the fan wheels, or at least one of the fan wheels, is arranged directly behind or in immediate vicinity to the intake opening of the exhaust hood. Because of the curvature of the guide vanes in radial direction, the surface area that is available for the heat exchange is also enlarged because the walls extending in radial direction have a greater length and thus surface area.
  • the annular discharge opening distributes and makes uniform the air flows coming in from the individual venting passages across the entire available space and guides in this way the airflows in a uniform flow into an exhaust pipe.
  • the outer wall of the annular discharge opening can have a bell shape matched to the flow conditions within the interior. A bell shape is in particular expedient when the exhaust pipe into which the exhaust flow is introduced has a reduced cross-section in comparison to the exhaust hood in the area of the second fan wheel.
  • the first and second fan wheels have an at least approximately identical air conveying volume.
  • the at least approximately identical air conveying volume By means of the at least approximately identical air conveying volume, it is avoided that underpressure or overpressure states are generated in the vented building in case of extended operation of the exhaust hood. In this way, it is technically precluded that, for example, flue gases of a heating system are sucked in by underpressure into the building. Failure-prone contact switches on windows that monitor a tilted position for venting purposes are no longer required because the exhaust hood is technically designed such that identical, or at least approximately identical, incoming and exhaust flows are produced.
  • the first and the second fan wheels are arranged on a common shaft.
  • the first and the second fan wheels can be driven by a common drive motor. Because of this arrangement the exhaust hood can be operated such that only a single drive motor is required when the vanes of the first and second fan wheels convey in opposite directions. Mounting and removal of the fan wheels, for example, for cleaning purposes, is simplified because the fan wheels are a single unit.
  • the first fan wheel sucks in the incoming room air, forces it into the venting passages correlated with the first fan wheel, wherein the room air can be guided from the venting passages into the discharge opening
  • the second fan wheel sucks in the incoming external air, forces it into the venting passages correlated with the second fan wheel, wherein the external air can be guided from the venting passages in a direction that laterally is remote from the rotation axis of the fan wheels.
  • an air guiding pipe with a pipe-in-pipe air guiding action can be connected to the exhaust hood.
  • the pipe-in-pipe guiding action makes it possible to utilize the length of the conveying stretch across which the air guiding pipe extends also for transfer of heat.
  • the venting passages correlated with the first and/or second fan wheel are formed by one or several shaped parts that are removable easily from the exhaust hood.
  • the shaped parts can be produced in a simple way even with difficult geometries, for example, from plastic material.
  • locking and/or form-fit connections for connecting a shaped part with the remainder of the exhaust hood can be provided in order to be able to mount and remove the shaped part without a tool, for example, for cleaning purposes.
  • At least one fan wheel is designed as a shaped part that is easily removable from the exhaust hood.
  • the shaped parts can be easily produced even with difficult geometries, for example, from plastic material.
  • locking and/or form-fit connections for connecting a shaped part with the remainder of the exhaust hood can be provided in order to be able to mount and remove the shaped part without a tool, for example, for cleaning purposes.
  • FIG. 1 a schematic cross-section of an exhaust hood
  • FIG. 2 a view of the fan wheels
  • FIG. 3 a schematic view of the guide vanes.
  • FIG. 1 an exhaust hood 2 is shown in a schematic cross-section view in which the first fan wheel 4 and the second fan wheel 6 can be seen.
  • guide vanes 8 are arranged externally on the fan wheels 4 .
  • the room air is sucked in by the first fan wheel 4 through an intake opening 10 , is accelerated, and is then blown through the openings 12 correlated with the first fan wheel 4 into the venting passages that are laterally delimited by the guide vanes 8 .
  • the room air that has been blown into the venting passages flows about the second fan wheel 6 .
  • the external air is sucked in by the second fan wheel 6 through the supply passage 12 and is then blown through the openings 16 correlated with the second fan wheel 6 , as indicated also by the arrows, into the venting passages laterally delimited by the guide vanes 8 . Since the first fan wheel 4 is separated from the second fan wheel 6 by a partition 18 , the respective air flows cannot mix with each other in the area of the fan wheels 4 , 6 . In the embodiment, the external air is guided through the venting passages into an area that is lateral relative to the first fan wheel 4 where it can enter the room through discharge openings.
  • venting passages that are guided from the first fan wheel 4 about the second fan wheel 6 are closed relative to the second fan wheel 6 , as indicated in FIG. 1 by the arrows illustrated in dashed lines in this area.
  • the venting passages that are guided from the second fan wheel 6 about the first fan wheel 4 are closed relative to the first fan wheel 4 which in this area is indicated also by the arrows that extend in dashed line.
  • the venting passages in the area of the fan wheels 4 , 6 are illustrated displaced relative to each other in order to be able to illustrate the air inlet through the openings 12 , 16 into the venting passages.
  • the room air that passes through the venting passages after it has passed the area of the second fan wheel 6 reaches the area of an annular discharge opening 20 from where the room air passes into the exhaust pipe 22 .
  • the exhaust pipe 22 and the supply passage 14 are shown as a pipe-in-pipe air guiding system in which the conveying stretch can be used additionally for heat exchange between the incoming external air and the outflowing room air by means of the inner wall 24 .
  • the inner wall 24 extends into the area of the discharge opening 20 where it delimits the latter relative to the interior and where it opens into the receiving opening 26 for receiving the external air in the area of the second fan wheel 6 .
  • a drive motor 28 is provided having a drive shaft that, according to a preferred embodiment, is coaxial to the axis of rotation of the first and second fan wheels 4 , 6 .
  • both fan wheels 4 , 6 can thus be driven. In this way, it is possible in a simple way to ensure also an at least approximately identical conveying performance of the two fan wheels 4 , 6 without this requiring a synchronization of two drive motors for differently adjustable rotary speeds of the fan wheels.
  • FIG. 2 shows a view of a combined fan wheel 4 , 6 .
  • the first and second fan wheels 4 , 6 according to one embodiment of the invention can also be formed as a single component between which, by retrofitting, advantageously only the partition 18 has been introduced.
  • the rotating fan wheels 4 , 6 suck in the room air and external air from the interior and force it by means of the fan blades 30 outwardly into the area of the guide vans.
  • FIG. 3 the guide vanes 8 are illustrated in a schematic view.
  • the upper guide vanes 8 a are correlated with the second fan wheel 6 and separated by the partition 18 from the guide vanes 8 b correlated with the first fan wheel 4 .
  • the guide vanes 8 a, 8 b are displaced relative to each other by half a spacing of a guide vane 8 relative to a neighboring one.
  • By an arrow it is illustrated how an airflow exiting from the first fan wheel 4 passes through an opening 12 into the venting passage between two neighboring guide vanes 8 a, is deflected upwardly, and is then guided in upward direction through a cavity 32 that is formed in an upper guide vane 8 b.
  • the air flow that enters the lower venting passage can pass into the cavity 32 arranged above.
  • the air flow that is exiting from the first fan wheel 4 and is illustrated in FIG. 3 by the arrow can exchange heat with the air flow that is passing from the second fan wheel 6 into the venting passages between the guide vanes 8 b.
  • the surfaces 34 are not only located on the sides of the guide vanes 8 a, 8 b that are facing the fan wheels 4 , 6 but also on the sides that are facing away because they also delimit one side of a venting passage. In this way, for a larger number of guide elements 8 this results in a large surface area available for heat exchange between the respective airflows.
  • the arrow indicates not only the heat exchange in the area of the guide vanes 8 b but, with the aid of the visible openings in the partition 18 it is apparent that an air flow generated by the fan wheel 6 also can enter the guide vanes 8 a that are provided with a cavity 32 and can use its surfaces as heat exchange surfaces. The heat exchange is then realized not only in the dashed upper area of the arrow that symbolizes the air flow but also in the lower area in which the air flow is indicated by the solid arrow.
  • the invention is not limited to the afore described embodiment but can be modified and adjusted to a concrete application situation by a person of skill in the art in a way that appears suitable to that person.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ventilation (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US13/119,774 2008-09-18 2009-09-12 Exhaust Hood Abandoned US20110171898A1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE102008047974 2008-09-18
DE102008047974.8 2008-09-18
DE102009003957.0 2009-01-07
DE102009003957.0A DE102009003957B4 (de) 2008-09-18 2009-01-07 Dunstabzugshaube
PCT/EP2009/006627 WO2010031524A2 (de) 2008-09-18 2009-09-12 Dunstabzugshaube

Publications (1)

Publication Number Publication Date
US20110171898A1 true US20110171898A1 (en) 2011-07-14

Family

ID=41693931

Family Applications (1)

Application Number Title Priority Date Filing Date
US13/119,774 Abandoned US20110171898A1 (en) 2008-09-18 2009-09-12 Exhaust Hood

Country Status (6)

Country Link
US (1) US20110171898A1 (de)
EP (1) EP2334989A2 (de)
KR (1) KR20110056404A (de)
CN (1) CN102159893A (de)
DE (1) DE102009003957B4 (de)
WO (1) WO2010031524A2 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106500151A (zh) * 2016-10-28 2017-03-15 沈阳建筑大学 一种民宅建筑厨房补风控烟节能系统

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20121342A1 (it) * 2012-07-31 2014-02-01 Elica Spa Modulo per cappe aspiranti
DE102014115286A1 (de) * 2013-10-21 2015-04-23 Georg Emanuel Koppenwallner Abzugsvorrichtung, insbesondere Dunstabzugsvorrichtung
WO2016116871A1 (en) 2015-01-22 2016-07-28 Elica S.P.A. Suction grid for an air guide of a domestic hood, air guide having such grid and domestic hood having such air guide.
US10088181B2 (en) * 2015-12-16 2018-10-02 Amazon Technologies, Inc. Passive roof exhausting system
DE102017217853B4 (de) 2017-10-06 2022-07-07 Wilhelm Bruckbauer Kochfeldsystem mit Dunstabzugsvorrichtung
KR102317436B1 (ko) * 2021-05-28 2021-10-25 조성은 미세먼지 저감 기능을 가지는 에너지 절약형 후드
CN113446646B (zh) * 2021-07-20 2022-11-01 绍兴凯森厨卫有限公司 一种吸油烟机净化装置

Citations (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1957971A (en) * 1930-06-24 1934-05-08 Perry S Martin Ventilator
US3487767A (en) * 1967-01-30 1970-01-06 Nordisk Ventilator Fan for the ventilation of buildings,e.g.,stables
US3513766A (en) * 1968-06-24 1970-05-26 Willard K Ahlrich Ventilating hood
US3557681A (en) * 1968-01-25 1971-01-26 Nordisk Ventilator Fan for the ventilation of buildings, e.g. stables
US3570386A (en) * 1968-01-29 1971-03-16 Ludwig Baumann Ventilating fan unit
US3601184A (en) * 1969-06-05 1971-08-24 Jean Hauville Air exchanging and conditioning device
US3722396A (en) * 1970-11-16 1973-03-27 Nordisk Ventilator System for the ventilation of buildings
US4098616A (en) * 1977-03-07 1978-07-04 Elsters, Inc. Recirculating dishwasher hood
US4102597A (en) * 1976-03-31 1978-07-25 Teizo Sakai Ventilating suction and exhaust fan device of plate type
US4102596A (en) * 1976-03-31 1978-07-25 Teizo Sakai Ventilating suction and exhaust fan device of sirocco type
US4263891A (en) * 1976-11-30 1981-04-28 Ilmar Mets Range ventilator
US4506655A (en) * 1981-02-03 1985-03-26 Kuechler Irvin R Compact double fan apparatus and method with grease-separating capabilities
US5163869A (en) * 1991-12-05 1992-11-17 George C. Yeh Method and apparatus for ventilating gases containing condensable vapors
US5890484A (en) * 1995-03-08 1999-04-06 Yamada; Yoshihiro Exhaust system for kitchens
US6506109B1 (en) * 2001-08-03 2003-01-14 Fisher Hamilton, Inc. Fume hood with air chamber
US6530743B1 (en) * 2001-11-13 2003-03-11 Terry Thomas Barrett Heat transfer fan
US6802311B1 (en) * 2003-04-03 2004-10-12 Peter Yeung Kitchen range hood motor housing and fan
US7018171B2 (en) * 2004-01-23 2006-03-28 Airex Inc. Blower with double inlet wheel
US20060157048A1 (en) * 2004-12-17 2006-07-20 Heilman Nikolaus J Grease extraction system, particulate extractor, and method
US7320636B2 (en) * 2004-01-20 2008-01-22 Greenheck Fan Corporation Exhaust fan assembly having flexible coupling
US7830658B2 (en) * 2005-06-17 2010-11-09 Fiwihex B.V. Housing with cooling for electronic equipment
US20100291849A1 (en) * 2004-01-20 2010-11-18 Greenheck Fan Corporation Exhaust Fan Assembly

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GB1246935A (en) * 1969-03-24 1971-09-22 Jean Hauville Improvements in or relating to air exchanging and conditioning device
CH658899A5 (en) * 1983-06-03 1986-12-15 Sulzer Ag Room air-conditioning device
CH690376A5 (de) * 1996-03-22 2000-08-15 Ricardo Dr Bernasconi Dunstabzugsvorrichtung für Kochherde.
JPWO2004051152A1 (ja) * 2002-11-29 2006-04-06 山田　善洋 給排気型レンジフード
EP1794507B1 (de) * 2004-09-23 2013-05-01 CSR Building Products Limited Hybridventilator
DE102005033224A1 (de) 2005-07-15 2007-01-18 BSH Bosch und Siemens Hausgeräte GmbH Dunstabzugshaube und Dunstabzugsvorrichtung
DE102007051942A1 (de) 2007-10-29 2009-04-30 Boiting, Hans-Hermann, Prof. Luftabsaugvorrichtung

Patent Citations (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1957971A (en) * 1930-06-24 1934-05-08 Perry S Martin Ventilator
US3487767A (en) * 1967-01-30 1970-01-06 Nordisk Ventilator Fan for the ventilation of buildings,e.g.,stables
US3557681A (en) * 1968-01-25 1971-01-26 Nordisk Ventilator Fan for the ventilation of buildings, e.g. stables
US3570386A (en) * 1968-01-29 1971-03-16 Ludwig Baumann Ventilating fan unit
US3513766A (en) * 1968-06-24 1970-05-26 Willard K Ahlrich Ventilating hood
US3601184A (en) * 1969-06-05 1971-08-24 Jean Hauville Air exchanging and conditioning device
US3722396A (en) * 1970-11-16 1973-03-27 Nordisk Ventilator System for the ventilation of buildings
US4102596A (en) * 1976-03-31 1978-07-25 Teizo Sakai Ventilating suction and exhaust fan device of sirocco type
US4102597A (en) * 1976-03-31 1978-07-25 Teizo Sakai Ventilating suction and exhaust fan device of plate type
US4263891A (en) * 1976-11-30 1981-04-28 Ilmar Mets Range ventilator
US4098616A (en) * 1977-03-07 1978-07-04 Elsters, Inc. Recirculating dishwasher hood
US4506655A (en) * 1981-02-03 1985-03-26 Kuechler Irvin R Compact double fan apparatus and method with grease-separating capabilities
US5163869A (en) * 1991-12-05 1992-11-17 George C. Yeh Method and apparatus for ventilating gases containing condensable vapors
US5890484A (en) * 1995-03-08 1999-04-06 Yamada; Yoshihiro Exhaust system for kitchens
US6506109B1 (en) * 2001-08-03 2003-01-14 Fisher Hamilton, Inc. Fume hood with air chamber
US6530743B1 (en) * 2001-11-13 2003-03-11 Terry Thomas Barrett Heat transfer fan
US6802311B1 (en) * 2003-04-03 2004-10-12 Peter Yeung Kitchen range hood motor housing and fan
US7320636B2 (en) * 2004-01-20 2008-01-22 Greenheck Fan Corporation Exhaust fan assembly having flexible coupling
US20100291849A1 (en) * 2004-01-20 2010-11-18 Greenheck Fan Corporation Exhaust Fan Assembly
US7018171B2 (en) * 2004-01-23 2006-03-28 Airex Inc. Blower with double inlet wheel
US20060157048A1 (en) * 2004-12-17 2006-07-20 Heilman Nikolaus J Grease extraction system, particulate extractor, and method
US7830658B2 (en) * 2005-06-17 2010-11-09 Fiwihex B.V. Housing with cooling for electronic equipment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106500151A (zh) * 2016-10-28 2017-03-15 沈阳建筑大学 一种民宅建筑厨房补风控烟节能系统

Also Published As

Publication number Publication date
WO2010031524A2 (de) 2010-03-25
EP2334989A2 (de) 2011-06-22
CN102159893A (zh) 2011-08-17
DE102009003957B4 (de) 2020-12-17
KR20110056404A (ko) 2011-05-27
WO2010031524A3 (de) 2010-06-17
DE102009003957A1 (de) 2010-03-25

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