EP4124807B1 - Diffuseur amélioré pour systèmes de ventilation - Google Patents

Diffuseur amélioré pour systèmes de ventilation Download PDF

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Publication number
EP4124807B1
EP4124807B1 EP21188932.4A EP21188932A EP4124807B1 EP 4124807 B1 EP4124807 B1 EP 4124807B1 EP 21188932 A EP21188932 A EP 21188932A EP 4124807 B1 EP4124807 B1 EP 4124807B1
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EP
European Patent Office
Prior art keywords
diffuser
apertures
stationary part
reservoir
damper
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.)
Active
Application number
EP21188932.4A
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German (de)
English (en)
Other versions
EP4124807A1 (fr
Inventor
Yusuf Ozbakis
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.)
Silverline Endustri ve Ticaret AS
Original Assignee
Silverline Endustri ve Ticaret AS
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 Silverline Endustri ve Ticaret AS filed Critical Silverline Endustri ve Ticaret AS
Priority to EP21188932.4A priority Critical patent/EP4124807B1/fr
Publication of EP4124807A1 publication Critical patent/EP4124807A1/fr
Application granted granted Critical
Publication of EP4124807B1 publication Critical patent/EP4124807B1/fr
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Classifications

    • 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
    • F24F13/02—Ducting arrangements
    • F24F13/06—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F24F13/082—Grilles, registers or guards
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F24F13/082—Grilles, registers or guards
    • F24F13/085—Grilles, registers or guards including an air filter
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F24F13/10—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
    • 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
    • F24F13/20—Casings or covers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F24F13/082—Grilles, registers or guards
    • F24F2013/088—Air-flow straightener

Definitions

  • the present invention relates to a diffuser for use in ventilation systems. More particularly, the present invention pertains to an improved diffuser with a stationary part having a plurality of apertures, a damper rotating with a circumferential movement over said stationary part and having a plurality of apertures corresponding to said apertures, and an actuator to move said damper.
  • the present invention further relates to a novel range hood and a central ventilation system comprising the diffuser as mentioned hereinabove.
  • Common/central ventilation systems are increasingly used in multi-unit residential buildings for intake and exhaust of air in kitchens, rooms, bathrooms or any other area of the apartments.
  • Central ventilation systems typically involve a high-power engine connected to a common exhaust line for sucking the internal dirty air of the apartments and discharging the same to the outside.
  • the common exhaust line may be connected to the kitchen appliances such as range hoods for extracting smoke on a cooktop.
  • range hoods for extracting smoke on a cooktop.
  • diffusers are required in the foregoing systems in order to allow the air to flow through the common discharge line.
  • These diffusers are typically integrated to the range hoods in the kitchens, or on the walls and ceilings of other rooms whereby the initial installation and the periodic maintenance of the system are carried out by skilled technicians.
  • One common problem encountered with conventional diffusers of the exhaust systems mentioned above is that they tend to accumulate harmful substances on their surface such as dirt, dust and grease, which reduces their overall performance, causes hygiene related issues to come up and causes the diffuser to make more noise. This eventually requires the diffuser to be detached and thoroughly cleaned, which is cumbersome for users and technicians. Said requirement particularly becomes a greater burden as the diffuser requires cleaning up and maintenance more frequently due to the particles accumulated thereon.
  • WO 01/13046 A1 relates to a diffuser adapted to regulate air flow from an underfloor air distribution system.
  • a grille sits on a dust receptacle or basket-shaped housing that is supported by a mounting assembly in the floor.
  • a flow regulator or damper nests inside the housing. Both the housing and the flow regulator have air slots extending through their side walls. Air from the underfloor air plenum passes through these slots into the diffuser and is forced through helical slots in the grille into the room above the diffuser.
  • the air flow rate can be adjusted by rotating the flow regulator within the housing so that the slots in the flow regulator are either in or out of registry with the slots in the housing.
  • the flow regulator can be rotated by turning the grille.
  • the grille and mounting assembly have indicators that give a visual indication of the position of the flow regulator with respect to the housing, the opening of the slots, and the flow rate through the diffuser.
  • EP 2379950 A1 relates to an air diffuser comprising at least one discharge that is hand manipulable to vary at least two of the airflow rates, the airflow pattern and the airflow direction, wherein the airflow pattern produced by the discharge element may be at least one of a substantially perpendicular axial swirl pattern relative to the discharge element surface or a substantially inclined swirl patten relative to the perpendicular axis of the discharge element surface.
  • a dirt collecting basket with two chambers is also disclosed.
  • this document discloses a floor diffuser, and this design is not applicable to wall type or ceiling type diffusers, as the dirt collecting basket of this document differs greatly from the reservoir and the structure described hereinbelow in the context of the present invention.
  • US 5180331 A discloses a device attachable to a suspended floor member for collecting materials which fall through grid openings in the floor member and for controlling the rate of airflow through the grid openings in an adjustable manner.
  • the device includes a spill container for positioning under the grid openings of the floor member in a coordinated position such that a venting path is provided for permitting airflow past the spill container from above the floor member while retaining the capacity to collect liquids and particulate matter flowing through the grid openings.
  • Adjustable dampening structure is coupled with the spill member to provide selection of differing vent openings to control rate of airflow through the structure.
  • this document also discloses a floor diffuser with a material retaining reservoir. However, this reservoir is only intended to retain particulate matter falling through the grid openings and this diffuser arrangement is not applicable to wall type or ceiling type diffusers. Hence, the diffuser provided in this document has limited usability in ventilation systems.
  • EP 3825621 A1 and EP 3825620 A1 relate to a diffuser for ventilation of a multi-unit residential building through a central ventilation system, comprising a stationary disc having a plurality of apertures, a damper rotating with a radial movement over said stationary disc and having a plurality of wings corresponding to said apertures (11) in order to open and close them, and a motor to move the damper.
  • the present invention relates to a novel diffuser (100) for achieving the foregoing objectives comprising a stationary part (1) having a plurality of first apertures (5), a damper (2) arranged for rotating with a circumferential movement over said stationary part (1) and having a plurality of second apertures (6) corresponding to said first apertures (5), and an actuator to move said damper (2).
  • the stationary part (1) comprises a reservoir (3) and said stationary part (1) is adapted to be inclined towards the reservoir (3) in such a way that said reservoir (3) would stand at a lower level than the rest of said stationary part (1), and edges of said first apertures (5) are adapted to protrude towards the outlet of the diffuser (100) in order to form a plurality of particle channels (4) between said first apertures (5) for the particles to flow through, wherein said particle channels (4) surround said reservoir (3) in order to allow said particles to accumulate within said reservoir (3) by way of gravity.
  • said protruding edges are configured in such a way in which a portion of an edge is protruding perpendicularly from its base and the rest thereof is protruding in an inclined manner.
  • the diffuser (100) further comprises a filter (7).
  • said first apertures (5) are adapted to be equal in shape and size, and said reservoir (3) is adapted to be at an equal distance to proximal ends of each said apertures (5).
  • said stationary part (1) and said damper (2) comprise 8 first apertures (5) and 8 second apertures (6) respectively, and hence said stationary part (1) comprises 8 particle channels.
  • the angle of said inclines is less than 45 degrees when said stationary part (1) and said damper (2) comprise 8 apertures (5, 6).
  • said damper (2) comprises indication means (8) coinciding with at least one predetermined indication point (9) on said stationary part (1) in order to show predetermined positions of the damper (2) corresponding to predetermined levels of airflow rate.
  • said stationary part (1) preferably comprises mounting means (10) for the installation to and detachment from the ceiling or a wall.
  • said apertures (5, 6) are in the form of an isosceles trapezoid.
  • said filter (7) is mounted between said stationary part (1) and said damper (2).
  • the present invention relates to a central ventilation system for removing dirty air from a medium such as a multi-unit residential building comprising:
  • the present invention relates to the use of a diffuser (100) according to present invention in a central ventilation system of a multi-unit residential building or a range hood connected to said system.
  • the present invention pertains to a range hood (200) comprising the diffuser (100) according to the present invention.
  • the range hood (200) further comprises an air-guiding structure (13) to prevent turbulent flow around the inlet of the diffuser (100).
  • the present invention relates to a diffuser (100), comprising a stationary part (1) having a plurality of first apertures (5), a damper (2) arranged for rotating with a circumferential movement over said stationary part (1) and having a plurality of second apertures (6) corresponding to said first apertures (5), and an actuator (not shown) to move said damper (2).
  • Said actuator may for example be a servo motor.
  • Such arrangements where an actuator is used to rotate the damper over the stationary part are known in the related technical field.
  • the stationary part (1) comprises a reservoir (3) and said stationary part (1) is adapted to be inclined towards the reservoir (3) in such a way that said reservoir (3) would stand at a lower level than the rest of said stationary part (1). Furthermore, edges of said first apertures (5) are adapted to protrude in order to form a plurality of particle channels (4) between said first apertures (5) for the particles to flow through, wherein said particle channels (4) surround said reservoir (3) in order to allow said particles to accumulate within said reservoir (3) by way of gravity.
  • the reservoir (3) being at a lower level shall be interpreted as the reservoir (3) being closer to the floor to facilitate the accumulation of particles thereon, and the invention may be carried out via any shape of the diffuser (100) in compliance with the above-mentioned description, such as a cone.
  • Lower ends of the particle channels (4) formed by the protrusions meet at the area designated for the reservoir (3) and accumulation of dirt particles inside the ventilation area is prevented, since they would naturally accumulate in the reservoir (3) instead of the particle channels (4) with the help of gravity during the operation, increasing overall performance of the diffuser (100) as it would take longer for the airflow area to become dirty.
  • the inclined structure of the diffuser (100) facilitates the movement of the damper (2), as the effect of vertical forces caused by the airflow on the damper (2) is thereby significantly reduced.
  • cleaning up and maintenance of the diffuser (100) can effortlessly be performed.
  • protruding edges are configured in such a way in which a portion of an edge is protruding perpendicularly from its base and the rest thereof is protruding in an inclined manner.
  • said first apertures (5) are in the form of a polygon, some of the edges may be configured to protrude perpendicularly while others are protruding in an inclined manner. It is discovered that this configuration causes small vortices to develop around the inlet of the diffuser (100), hence increasing the flow rate and allowing the reservoir (3) to accumulate more particles.
  • the diffuser (100) further comprises a filter (7) as shown in FIG. 3 and FIG. 4 .
  • Said filter (7) may preferably be a wire mesh filter, or any suitable filter that is known to a person skilled in the art.
  • said filter (7) may be mounted between said stationary part (1) and said damper (2). This improves the separation performance as larger particles would be collected on the filter (7) which normally wouldn't be able to reach the reservoir (3). This in turn slows down the accumulation process resulting the reservoir (3) and requires cleaning less frequently.
  • Said filter (7) may be adapted to cover the entire inner surface of said stationary part (1).
  • said first apertures (5) are adapted to be equal in shape and size
  • said reservoir (3) is adapted to be at an equal distance to proximal ends (proximal to the reservoir (3) itself) of each of said first apertures (5).
  • the reservoir (3) may be positioned at the centre as seen in FIG. 5 . Said feature provides a uniform distribution of particles within the diffuser (100) and prevents particles from accumulating on a particular zone within the reservoir (3).
  • said first and second apertures (5, 6) are in the form of an isosceles trapezoid and more preferably all of the first and second apertures (5, 6) are in the form of an isosceles trapezoid with equal sizes, as shown in the FIGS 1 , 2 , 3, 4 and 5 , ensuring that the surface area is utilized more efficiently, and ventilation performance is improved.
  • said stationary part (1) and said damper (2) preferably comprise 8 first apertures (5) and 8 second apertures respectively, and hence said stationary part (1) comprises 8 particle channels (4). It is found during the experiments that when the stationary part (1) and the damper (2) comprise 8 apertures (5, 6) and the stationary part (1) comprises 8 particle channels (4), a higher performance in terms of ventilation is obtained, however said elements may also have a different number of first and second apertures (5, 6) depending on their size and shape.
  • said stationary part and damper (1, 2) comprise 8 first apertures (5) and 8 second apertures (6) respectively and thus the stationary part (1) comprises 8 particle channels thereon, the flow rate of air is maximized and the amount of turbulent flow is minimized, contributing to an increase in the overall performance of the diffuser (100) according to the present invention.
  • This embodiment may be combined with the above-mentioned embodiments for a diffuser (100) comprising a stationary part (1) with 8 first apertures (5) and a damper (2) with 8 second apertures (6) wherein all of the apertures (5, 6) are in the form of an isosceles trapezoid with equal sizes, and the reservoir (3) is positioned at the centre to obtain a further advantageous embodiment.
  • this embodiment may be combined with the above-mentioned embodiment regarding inclined protruding edges to obtain a further advantageous embodiment.
  • this embodiment's performance depends on the incline angle of said protrusions wherein an incline angle of 15 degrees provided 336,8 m 3 /h flow rate, 0,188 m/s capture velocity, 0,025 j/Kg turbulence kinetic energy; an incline angle of 30 degrees provided 340,6 m 3 /h flow rate, 0,191 m/s capture velocity, 0,025 j/Kg turbulence kinetic energy; an incline angle of 45 degrees provided 332,9 m 3 /h flow rate, 0,186 m/s capture velocity, 0,026 j/Kg turbulence kinetic energy, an incline angle of 60 degrees provided 323,2 m 3 /h flow rate, 0,188 m/s capture velocity, 0,031 j/Kg turbulence kinetic energy and an incline angle of 75 degrees provided 306,8 m 3 /h, 0,175 m/s capture velocity, 0,028 j/Kg,
  • said damper (2) comprises indication means (8) coinciding with at least one predetermined indication point (9) on said stationary part (1) in order to show predetermined positions of the damper (2) corresponding to predetermined levels of airflow rate as shown in FIGS 1 , 2 , 4 and 5 .
  • Said indication means (8) are preferably provided in the form of written indications, grooves, or a combination thereof, and more preferably at least three of said predetermined indication points (9) are provided for at least three predetermined levels of airflow rate.
  • the position of the damper (2), hence the airflow rate may be manually or automatically controlled by means of a control system (not shown, e.g., a control system based on differential pressure which is well-known in the related technical field) in order to ensure that the instantaneous airflow rate matches the desired airflow rate at all times.
  • a control system not shown, e.g., a control system based on differential pressure which is well-known in the related technical field
  • said stationary part (1) preferably comprises mounting means (10) for the installation to and detachment from the ceiling or a wall to provide a facilitated installation and detachment of the diffuser (100) for cleaning up and maintenance purposes.
  • said mounting means (10) may be provided in the form of mounting holes (11) as can be seen in FIGS 1 , 2 , 3, 4 and 5 , and screws (12) corresponding thereto as can be seen in FIG. 7 in order to allow the stationary part (1) to be screwed to the ceiling or a wall.
  • the installation may also be carried out by other mounting means known to a person skilled in the art.
  • the present invention relates to a central ventilation system for removing dirty air from a medium such as a multi-unit residential building comprising:
  • the present invention relates to the use of a diffuser (100) according to present invention in a central ventilation system of a multi-unit residential building or a range hood (200) connected to said system.
  • the present invention relates to a novel range hood (200) comprising the diffuser (100) according to the present invention as shown in FIG. 6 and FIG. 7 .
  • Said range hood (200) may be connected to a common discharge/ventilation line of a building and the diffuser (100) is preferably connected to an exhaust duct of said range hood (200).
  • the range hood (200) further comprises an air-guiding structure (13) to prevent turbulent flow around the inlet of the diffuser (100) as shown in FIG. 6 and FIG. 7 .
  • Said air-guiding structure (13) preferably comprises a curved, differentiable surface and/or a planar surface surrounding the inlet of the range hood (200).
  • the stationary part (1) and the damper (2) of the diffuser (100) according to the present invention may conveniently be produced from plastics, metal or a combination of metal and plastics such that one of them is metal and the other is plastics, or any material that is suitable for the application. More preferably, both components are made of a metal.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air-Flow Control Members (AREA)

Claims (14)

  1. Diffuseur (100) pour la ventilation d'un milieu à travers un système de ventilation, comprenant une partie fixe (1) ayant une pluralité de premières ouvertures (5), un registre (2) agencé pour tourner en effectuant un mouvement circonférentiel sur ladite partie fixe (1) et ayant une pluralité de deuxièmes ouvertures (6) correspondant auxdites premières ouvertures (5), et un actionneur pour déplacer ledit registre (2), dans lequel
    - la partie fixe (1) comprend un réservoir (3) et ladite partie fixe (1) est adaptée pour être inclinée vers le réservoir (3) de manière à ce que ledit réservoir (3) se trouve à un niveau inférieur par rapport au reste de ladite partie fixe (1),
    caractérisé en ce que
    - des bords desdites premières ouvertures (5) sont adaptés pour faire saillie pour former une pluralité de canaux à particules (4) entre lesdites premières ouvertures (5) pour l'écoulement des particules, dans lequel lesdits canaux à particules (4) entourent ledit réservoir (3) afin de permettre auxdites particules de s'accumuler à l'intérieur dudit réservoir (3) par gravité.
  2. Diffuseur (100) selon la revendication 1, dans lequel lesdits bords en saillie sont configurés de manière à ce qu'une partie d'un bord fasse saillie perpendiculairement à partir de sa base et que le reste de celui-ci fasse saillie de manière inclinée.
  3. Diffuseur (100) selon la revendication 1 ou 2, dans lequel le diffuseur (100) comprend en outre un filtre (7).
  4. Diffuseur (100) selon l'une quelconque des revendications précédentes, dans lequel lesdites premières ouvertures (5) sont adaptées pour présenter une forme et une taille égales, et ledit réservoir (3) est adapté pour être à équidistance des extrémités proximales de chacune desdites premières ouvertures (5).
  5. Diffuseur (100) selon l'une quelconque des revendications précédentes, dans lequel ladite partie fixe (1) et ledit registre (2) comprennent 8 premières ouvertures (5) et 8 deuxièmes ouvertures (6) respectivement, et, par conséquent, ladite partie fixe (1) comprend 8 canaux de particules.
  6. Diffuseur (100) selon les revendications 2 et 5, dans lequel l'angle desdites inclinaisons est inférieur à 45 degrés.
  7. Diffuseur (100) selon l'une quelconque des revendications précédentes, dans lequel ledit registre (2) comprend des moyens d'indication (8) coïncidant avec au moins un point d'indication prédéterminé (9) sur ladite partie fixe (1) afin de montrer des positions prédéterminées du registre (2) correspondant à des niveaux prédéterminés de débit d'air.
  8. Diffuseur (100) selon l'une quelconque des revendications précédentes, dans lequel ladite partie fixe (1) comprend des moyens de montage (10) pour l'installation sur un plafond ou un mur et le détachement de celui-ci.
  9. Diffuseur (100) selon l'une quelconque des revendications précédentes, dans lequel lesdites premières et deuxièmes ouvertures (5, 6) se présentent sous la forme d'un trapèze isocèle.
  10. Diffuseur (100) selon la revendication 3, dans lequel ledit filtre (7) est monté entre ladite partie fixe (1) et ledit registre (2).
  11. Système de ventilation central pour éliminer l'air encrassé d'un milieu tel qu'un immeuble résidentiel à logements multiples comprenant :
    - une conduite d'évacuation commune ayant des entrées pour les différents logements de l'immeuble,
    - un moteur commun raccordé à ladite conduite d'évacuation pour l'aspiration de l'air encrassé provenant desdites conduites,
    - un diffuseur (100) selon l'une quelconque des revendications 1 à 10 précédentes raccordé à au moins l'une desdites entrées.
  12. Utilisation d'un diffuseur (100) selon l'une quelconque des revendications 1 à 10 précédentes dans un système de ventilation central d'un immeuble résidentiel à logements multiples ou une hotte aspirante raccordée audit système.
  13. Hotte aspirante (200) comprenant le diffuseur (100) selon l'une quelconque des revendications 1 à 10 précédentes.
  14. Hotte aspirante (200) selon la revendication 13, dans lequel la hotte aspirante (200) comprend en outre une structure de guidage d'air (13) pour empêcher un écoulement turbulent autour de l'entrée du diffuseur (100).
EP21188932.4A 2021-07-30 2021-07-30 Diffuseur amélioré pour systèmes de ventilation Active EP4124807B1 (fr)

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Application Number Priority Date Filing Date Title
EP21188932.4A EP4124807B1 (fr) 2021-07-30 2021-07-30 Diffuseur amélioré pour systèmes de ventilation

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Application Number Priority Date Filing Date Title
EP21188932.4A EP4124807B1 (fr) 2021-07-30 2021-07-30 Diffuseur amélioré pour systèmes de ventilation

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EP4124807A1 EP4124807A1 (fr) 2023-02-01
EP4124807B1 true EP4124807B1 (fr) 2024-01-03

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116558009B (zh) * 2023-04-23 2023-11-14 广州品发机电科技有限公司 一种便于安装的复合风管

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE455384C (de) * 1924-11-07 1928-02-01 Waggon Und Maschinenfabrik Akt An der Decke anzubringende Lueftungsvorrichtung fuer Fahrzeuge, insbesondere Eisen- und Strassenbahnwagen
US5180331A (en) 1990-02-01 1993-01-19 Daw Technologies, Inc. Subfloor damper and spill container
GB2324369B (en) * 1997-04-14 2000-11-01 Hunter International Plc Heating,ventilating and air conditioning systems
US6361432B1 (en) * 1999-08-17 2002-03-26 Tomkins Industries, Inc. Air diffuser with air flow regulator
US9513026B2 (en) 2008-12-19 2016-12-06 Kaip Pty Limited Air diffuser and air circulation system
CN207438685U (zh) * 2017-11-10 2018-06-01 宁波方太厨具有限公司 一种吸油烟机
EP3825621A1 (fr) 2019-11-25 2021-05-26 Silverline Endüstri ve Ticaret A.S. Diffuseur sensible pour systèmes de ventilation centrales
EP3825620A1 (fr) 2019-11-25 2021-05-26 Silverline Endüstri ve Ticaret A.S. Diffuseur pour systèmes de ventilation

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