EP3436750B1 - Ventil mit veränderbarem luftstrom - Google Patents

Ventil mit veränderbarem luftstrom Download PDF

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Publication number
EP3436750B1
EP3436750B1 EP17723731.0A EP17723731A EP3436750B1 EP 3436750 B1 EP3436750 B1 EP 3436750B1 EP 17723731 A EP17723731 A EP 17723731A EP 3436750 B1 EP3436750 B1 EP 3436750B1
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EP
European Patent Office
Prior art keywords
valve
movable member
flap
air
flow
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EP17723731.0A
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English (en)
French (fr)
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EP3436750A1 (de
Inventor
Raymond John Hudson
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Individual
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Individual
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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
    • F24F13/08—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
    • F24F13/14—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre
    • F24F13/1486—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre characterised by bearings, pivots or hinges
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F24F11/745—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity the air flow rate increasing with an increase of air-current or wind pressure
    • 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
    • F24F13/105—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers composed of diaphragms or segments
    • 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
    • F24F13/14—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre
    • F24F13/1406—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre characterised by sealing means

Definitions

  • the invention relates to a variable air flow valve. More specifically, the invention relates to a valve that operates to enable variation of the flow-through volume capacity depending on the prevailing conditions and thus facilitate harmonisation in ventilation systems.
  • the air pressure in ducting can vary over time and depending on location, e.g. as a consequence of differential flow through/into areas of ducting and aspects such as the distance and, particularly, the height between inlets, ducting sections and outlet/expulsion points (such as extractor fans) or any point at which air is propelled.
  • This may particularly be the case for multi-branch ventilation systems in which there may be an inter-dependency between zones, for example a roof-top extractor-fan ventilation system that serves rooms on each floor of a multi-storey building.
  • Variation in air pressure and air flow through ducting can lead to undesirable inconsistency in the volume of air passing through a valve over time, potentially leading to a sub-optimal ventilation environment which may be particularly acute for rooms that are vertically furthest removed from mechanical propellers/extractors.
  • a fan situated on the roof of multi-storey building and extracting air from ventilation ducting on all floors will, other factors being equal, naturally draw more air from ducting that is nearer to it because less force is required, particularly with respect to vertical distance.
  • Such factors can therefore make it comparatively more difficult to achieve the desired turnover of air in certain regions of multi-storey buildings, e.g. the lower floors, while other areas (higher floors) may be subject to higher rates of air flow than necessary.
  • ventilation is a specific aspect of building regulations this can give rise to difficulties for constructors and developers.
  • GB2062842 discloses an air flow valve according to the preamble of claim 1.
  • the present invention aims to address such shortcomings in ventilation systems.
  • variable air flow valve comprising the features of claim 1.
  • valve could theoretically be used with any liquid or gas and all are encompassed within the term fluid.
  • intended application of the invention is specifically in ventilation ducting in order to enable moderation of air flow in different parts of a ventilation system.
  • the movable member may optionally take a range of positions, for example depending on air flow strength. Further, though the position of the movable member may be indirectly influenced it is preferable that it is affected by fluid flow without there being intervening components.
  • the movable member is on the upstream side of the opening.
  • the fluid flow opening may optionally be partially, more fully or even (essentially) completely obstructed by the movable member in the inhibitory position (as discussed further below).
  • the inhibitory position is adjacent to the valve seat.
  • the valve seat defines the fluid flow opening and the movable member is arranged to naturally, when the valve is in use, take a position removed from the valve seat when there is no or relatively low air-flow against the valve, such that there is greater access to the opening (and hence room for fluid flow through the opening) when there is lower speed/force of fluid flow from the upstream direction. Accordingly, in use, the movable member is conveniently biased away from the inhibitory position. Conveniently the movable member is biased away from the valve seat by gravity when there is no or relatively low air-flow against it. When the valve is fitted in ducting the valve seat may hence preferably be at an inclined angle.
  • the invention allows for adjustment of fluid flow volume depending on the relative strength/speed of fluid (air) flow upstream of the valve.
  • the movable member will close (such that it moves closer to the opening, e.g. becomes seated in the body of the valve), and so the passage of air across the valve will be restricted.
  • the pressure/speed of upstream airflow is low (or absent) the movable member will be able to open (potentially solely due to gravity), resulting in greater access to the opening and hence a greater opportunity for air/fluid to flow through the valve.
  • the invention allows for automatic adjustment of air flow volume, improving system consistency.
  • a valve according to the invention is used in ventilation ducting on a top floor (or floors) of a multi-storey building then the amount of air which may be drawn across the valve by a roof-top extractor could be reduced by the movable member acting to inhibit air flow. Consequently, with less air coming from upper floors the extractor would hence be able to draw more air from lower floors than would otherwise have been the case, thereby providing a more balanced air flow system by enabling greater turnover of air in parts of buildings which may otherwise be less well served. Due to its function of enabling differential fluid flow the invention could be used in many/all different areas of a building (e.g. higher and lower floors) but it is anticipated it may have greatest applicability to areas nearer to extractor systems.
  • valves of the invention may be developed to utilise an intermediate degree of flow inhibition, such that a movable member may, in use, not necessarily be intended to be completely 'open' or 'closed' (in a binary fashion) with respect to a fluid-flow opening.
  • Valve geometry could also mean that flow volume undulates as the movable member position/orientation progresses.
  • the movable member is a flap.
  • movable members may optionally be specifically designed and/or selected for different systems, depending on their characteristics. This may be particularly the case for flaps.
  • the valve may comprise one or more airflow apertures which remain unobstructed by the movable member.
  • airflow apertures may variously be part of/continuous with the area obstructed by the movable member (e.g. a flap or other movable member may have a smaller relevant surface area than the fluid flow opening which it obstructs), and/or may be separated from the area obstructed by the movable member.
  • valve seat may border an unobstructed airflow aperture; the seat may define a fluid flow opening which is bigger than the (relevant dimensions of) the movable member and so cannot be completely obstructed by the movable member.
  • an aperture is defined by another part of the valve frame, in which case optionally the fluid flow opening may potentially be more fully (or even essentially completely) obstructed by the movable member when in the inhibitory position.
  • airflow apertures may be adjustable and the movable member itself may optionally comprise one or more airflow apertures.
  • the movable member is preferably attached to the valve frame (another option may, for example, be to attach it in situ in ducting).
  • the movable member may be attached to the valve seat part of the valve frame.
  • the valve frame and seat may optionally be thought of as synonymous.
  • One of the simplest designs may be to have a flap as the movable member.
  • a flap may be pivotally mounted on the valve frame.
  • the flap may be hinged to the valve frame.
  • an unobstructed airflow aperture adjacent to the opening (area) which is obstructed by the movable member, either separate to or continuous with the obstructed opening.
  • an aperture may be considered an unobstructed part of the opening obstructed by the movable member.
  • Such an aperture may, for example, be above the flap or other movable member.
  • the forward movement of the flap may be restricted by abutting the valve seat (the valve frame around the opening).
  • the movable member may not necessarily contact the frame consistently at points adjacent to the frame and hence gaps may purposefully remain through which fluid may pass.
  • a flap may potentially only contact the frame at the lowest point.
  • Another option for limiting the forward movement of a flap may be to restrict the movement allowed by one or more pivot points.
  • One or more weights may be attached to the flap (or other movable member) in order to vary the relative air pressure needed to effect its displacement. Since the mass of applied weights could easily be varied this could be a convenient way of tailoring a valve for differing prevailing conditions.
  • a convenient mode of attachment may be a screw or nut and bolt mechanism whereby one or more screws/bolts pass through holes in both the weight and the flap or other movable member.
  • the movable member may comprise one or more airflow apertures through which air may flow irrespective of the position of the movable member.
  • an airflow aperture is adjustable whereby it may be closed, open and open to varying degrees.
  • the movable member e.g. a flap even when fully seated in the body of the valve, may thus optionally allow for a minimum relative degree of fluid passage as well as, conveniently, the variable adjustment of such a minimum.
  • the size of any opening/airflow aperture on the valve may be adjustable.
  • an airflow aperture (and/or any opening) may be closable and openable to varying degrees by operation of a movable and/or extendable screen.
  • a single screen may potentially operate to vary multiple airflow apertures.
  • such screens may be sliding screens and a screen itself may optionally comprise one or more airflow apertures. Accordingly the proportion of exposed airflow aperture may potentially be affected by (a) screen aperture(s) and the screen edges.
  • a sliding screen may be attached to the flap by a flange which projects through a slot on the flap (at an angle of approximately 90 degrees to the flap), and/or by a screw which passes through the flap and screen and secures the screen to the flap.
  • the horizontal position of a screw may be varied by moving it along a slot in the flap.
  • the position of a screen, and hence the size of a flap airflow aperture may conveniently be adjusted by use of a single screwdriver while the valve remains in situ in ducting.
  • a flap may be hinged to the valve frame. There are a number of ways this may be achieved. For example, protrusions on either side of the flap may extend into holes in the valve frame. Another option may be to hinge the flap along its top to the frame.
  • a valve could comprise a plurality of movable members, valve seats and/or openings etc.
  • a valve may comprise a plurality of hinged flaps as discussed above.
  • the degree of regulation of fluid flow may be more nuanced.
  • flaps may be variously open or closed in different air speed conditions. Flaps may optionally be located on/within bigger flaps if desired. It is thought probable that the most convenient structure will be embodiments with a single movable member varying the availability of a single opening, however.
  • the valve may be appropriately positioned in ducting (potentially at an incline) by virtue of its dimensions; it may be positioned by a push-fit.
  • frictional forces of the edges of the valve against one or more of the inside surfaces (e.g. top, bottom, either side) of the ducting may act to keep the valve in place.
  • Valves of different sizes and shapes may thus be made for ducting of different dimensions.
  • a valve with rounded sides could be used for circular tubing.
  • a valve need not necessarily occupy all of the ducting cross-sectional area.
  • One or more gaps between valve edges and ducting surfaces may optionally be used deliberately as a measure for helping to ensure there is always a minimum potential air flow through ducting.
  • a further approach to securing a valve in ducting may be to use a form of fixing, such as one or more clips. Also tape could be applied to the outside of the valve and used to adhere it and/or wedge it into position. Fixings may be used in conjunction with appropriate valve dimensions.
  • a valve may be fitted into ducting using an adaptor, which optionally could be integrated as part of the valve.
  • an adaptor may itself variably permit/obstruct fluid flow.
  • a further approach to using the valve could be to integrate it into ducting, e.g. such that the outside of the valve forms part of the piping conveying fluid.
  • valve could similarly be attached to or incorporated into a ventilation grille.
  • the approaches for ducting discussed above may equally apply to association with ventilation grilles.
  • a movable member may be biased away from a valve opening using gravity.
  • the valve may comprise biasing means for displacing one or more movable members.
  • components such as one or more springs and/or magnets may be used.
  • the valve may comprise a spring which biases the (or a) movable member towards remaining open.
  • a spring may enable more appropriate flow regulation in varying circumstances.
  • one end of a spring may be connected to the downstream side of a flap. This could be direct or may be via an additional component or components such as a rod.
  • the spring may conveniently be connected to one edge of the flap and to facilitate this a nook may be formed in the side of the valve frame/seat by which the spring or connecting component passes.
  • the other end of the spring may be supported by being attached to ducting in situ.
  • Another option would be for the rear end of the spring to be attached to the valve frame, for example using a rearwardly projected support/platform.
  • magnets could be used in a similar manner.
  • one magnet could be positioned behind the flap.
  • it may be attached to ducting in situ or to a rearward valve component such as the end of a rod.
  • Another magnet may be connected directly or indirectly, e.g. via a rod, to the flap. In this way the natural inter-repellence of the magnets can operate to bias the flap to remain open.
  • the extra influence of the repellent forces of magnets may allow for different resistance levels in differing conditions.
  • embodiments of the invention using means such as magnets and/or a spring(s) may be configured to operate with or without gravity acting to open the movable member.
  • a valve could be positioned vertically such that a flap would not naturally hang open; instead the biasing towards an open position in low air flow conditions may be dependent only upon the action of the spring, magnets or other appropriate means.
  • the valve may be made of a metallic material.
  • Metal can create less static than other materials and so may not attract particulate matter such as dust to such a high degree.
  • an assembly of ducting comprising a valve as disclosed herein.
  • the ducting is ventilation ducting.
  • the valve may be appropriately positioned in ducting (at an inclined angle) by virtue of its dimensions. For example, frictional forces of the edges of the valve against one or more of the inside surfaces (e.g. top, bottom, either side) of the ducting may act to keep the valve in place.
  • Valves of different sizes and shapes may thus be made for ducting of different dimensions. For example, a valve with more rounded sides could optionally be used for circular tubing.
  • a valve need not necessarily occupy all of the ducting cross-sectional area.
  • One or more gaps between valve edges and ducting surfaces may optionally be used deliberately as a measure for helping to ensure there is always a minimum potential air flow through ducting.
  • a further approach to securing a valve in ducting may be to use a form of fixing, such as one or more clips. Fixings may be used in conjunction with appropriate valve dimensions.
  • a ventilation system comprising one or more valves and/or ducting assemblies as disclosed herein.
  • the use of valves according to the invention allows the flow rates of air in different parts of a system to be better balanced.
  • a ventilation system may comprise a fan, a plurality of ducts and one or more valves as disclosed herein, the valve or valves being located to enhance balancing of the relative air flow in different parts of the system.
  • a valve 1 has a movable member which in this case is a flap 2 which, when closed, covers fluid flow opening 3 that is defined by valve seat 21 of frame 22.
  • the flap is hinged to the valve frame 22 such that it is able to move with respect to other parts of the valve under the influence of gravity.
  • the valve is positioned diagonally (inclined) in ducting 4 such that under low (or no) air flow conditions the flap naturally hangs open towards the upstream direction.
  • the relative dimensions of the valve and the ducting mean there is a frictional force with respect to the top/bottom/sides of the ducting keeping the valve in position.
  • flaps optionally may (see Figures 1 , 2 , 5 and 8 ) or may not (see Figures 3 and 4 ) comprise one or more window openings, see airflow apertures 6, 6a and 6b, which may be closed, opened and the size of which may be adjusted by variable positioning of screen 7.
  • By allowing air to flow through the flap, having an aperture on the flap may increase both the air speed/force needed to close the flap and the minimal volume of air that would flow across the valve when the flap is closed.
  • the position of screen 7 may hence be determined by particular conditions where the valve is to be used.
  • FIG. 4 shows another embodiment of the present invention.
  • biasing of the flap movable member to resist closure is enhanced by the use of a spring 8 connected to the flap.
  • the spring is connected to the flap by means of a rod 9.
  • a disc 10 At one end of rod 9 is a disc 10 to which the spring is secured.
  • the other end of rod fits into a socket 11 on one side of the flap.
  • Another option would be to screw the rod to the flap.
  • the other end of the spring (that distal from the flap) is secured to a platform 12 that projects inward from the side of the ducting.
  • a nook 13 in the valve seat 21 ensures that movement of the rod is not hindered by the valve frame 22.
  • FIG. 5 and 8 A preferred tubular embodiment of the invention is shown in Figures 5 and 8 .
  • a frame 14 comprises a valve seat 15 in the form of a circumferential border that defines the opening 3.
  • the valve seat part of the valve frame is clipped into the external tubular casing component of the frame (see e.g. notches on the top of the valve in Figures 5 and 8 ).
  • the movable member here a flap 2
  • Towards the top of the flap is a slot 17 through which a flange 23 of sliding screen 7 projects.
  • There is a window opening, airflow aperture 18, in the sliding screen which can be set to align to a varying degree with one or more corresponding apertures in the flap.
  • opening 18 exposes 6b and the side of the screen defines the edge of 6a (see Figure 8 ).
  • the position of the screen may be varied by unscrewing screw 19 (from the reverse side to that shown in Figure 5 ), moving it along a slot (not shown) in the flap and then tightening it again.
  • the screen position may be supported by the flange 23 in the slot 17, facilitating one-handed adjustment of the window opening(s). This may be advantageous when the valve is mounted in ducting behind a ventilation grille.
  • the flap 2 is hinged to the valve frame 14 by lateral projections 20 extending through holes in the casing.
  • the flap pivots about these points.
  • airflow aperture 25 is continuous with the opening 3 instead of being discrete from it. It may thus be considered a part of opening 3 which cannot be obstructed by the flap 2 due to the relative dimensions of the flap.
  • Ventilation system characteristics for example fan air pressure flow, length and/or depth of ducting may hence be profiled accordingly.

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

Claims (16)

  1. Lüftungsanlagenventil mit variablem Luftstrom zum Regeln des Durchflussvolumens durch einen Kanal in einer Lüftungsanlage, wobei das Ventil ein bewegliches Element (2) zum Eindämmen des Fluidstroms von der stromaufwärtigen zur stromabwärtigen Seite und einen Rahmen (22) umfasst, der einen an eine Öffnung (3) für den Fluidstrom durch das Ventil angrenzenden Sitz (21) umfasst,
    wobei das bewegliche Element in Bezug auf den Ventilsitz beweglich und zwischen einer eindämmenden Position, die die Öffnung zumindest teilweise versperrt, und einer Position, die verhältnismäßig weniger versperrend wirkt, reversibel beweglich und wobei das Element so angeordnet ist, dass es unter Einwirkung von gegen das Ventil wirkender stromaufwärtiger Fluidkraft in die eindämmende Position bewegt wird, so dass, wenn der Volumenstrom durch das Ventil variiert, der verfügbare Strömungsweg durch das Ventil angepasst wird,
    dadurch gekennzeichnet, dass
    das Ventil einen oder mehrere Luftstromdurchlässe (6) umfasst, die unversperrt bleiben können, wenn sich das bewegliche Element in der eindämmenden Position befindet.
  2. Ventil nach dem vorhergehenden Anspruch, wobei sich das bewegliche Element auf der stromaufwärtigen Seite der Öffnung befindet.
  3. Ventil nach einem der vorhergehenden Ansprüche, wobei sich das Ventil so in Lüftungskanäle einbauen lässt, dass das bewegliche Element durch Schwerkraft vom Ventilsitz weg vorgespannt ist, wenn kein oder ein relativ geringer Luftstrom darauf einwirkt, wodurch sich die Ventilfläche vergrößert, durch die Luft hindurchströmen kann.
  4. Ventil nach einem der vorhergehenden Ansprüche, das zumindest einen Luftstromdurchlass neben der Öffnung umfasst, die von dem beweglichen Element versperrt ist.
  5. Ventil nach Anspruch 4, wobei der Luftstromdurchlass zu der von dem beweglichen Element versperrten Öffnung gehört oder in diese übergeht.
  6. Ventil nach einem der vorhergehenden Ansprüche, wobei das bewegliche Element einen Luftstromdurchlass umfasst.
  7. Ventil nach einem der vorhergehenden Ansprüche, wobei die Größe einer oder mehrerer Öffnungen und/oder eines oder mehrerer Durchlässe anpassbar ist.
  8. Ventil nach Anspruch 7, wobei die Größe einer oder mehrerer Öffnungen und/oder eines oder mehrerer Durchlässe durch Ändern der Position und/oder der Abmessungen eines Schirms (7) anpassbar ist.
  9. Ventil nach Anspruch 8, wobei der Schirm ein verschiebbarer Schirm und/oder ausziehbar ist.
  10. Ventil nach einem der vorhergehenden Ansprüche, das ferner ein Vorspannmittel (8) zum von dem Ventilsitz weg erfolgenden Vorspannen des beweglichen Elements umfasst, das nicht von Schwerkraft abhängig ist.
  11. Ventil nach Anspruch 10, wobei das Vorspannmittel eine Feder und/oder einen oder mehrere Magneten umfasst.
  12. Baugruppe aus Kanälen und einem Ventil nach einem der vorhergehenden Ansprüche.
  13. Lüftungsanlage mit einer Baugruppe oder einem oder mehreren Ventilen nach einem der vorhergehenden Ansprüche.
  14. Baugruppe oder Anlage nach einem der Ansprüche 12 bis 13, wobei das Ventil oder die Ventile so in die Kanäle eingebaut ist/sind, dass das bewegliche Element durch Schwerkraft vom Ventilsitz weg vorgespannt ist, wenn kein Luftstrom darauf einwirkt, wodurch sich die Ventilfläche vergrößert, durch die Luft hindurchströmen kann.
  15. Ventil, Baugruppe oder Anlage nach einem der vorhergehenden Ansprüche, wobei es sich bei dem beweglichen Element um eine Klappe handelt.
  16. Lüftungsanlage nach einem der Ansprüche 13 bis 15 mit einem Gebläse, mehreren Kanälen und einem oder mehreren Ventilen nach einem der vorhergehenden Ansprüche, wobei das Ventil oder die Ventile so angeordnet sind, dass sie für einen besseren Ausgleich des relativen Luftstroms in verschiedenen Kanälen der Anlage sorgen.
EP17723731.0A 2016-03-31 2017-03-30 Ventil mit veränderbarem luftstrom Active EP3436750B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB201605515 2016-03-31
PCT/GB2017/050904 WO2017168162A1 (en) 2016-03-31 2017-03-30 Variable air flow valve

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EP3436750A1 EP3436750A1 (de) 2019-02-06
EP3436750B1 true EP3436750B1 (de) 2020-05-13

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EP3928011A4 (de) 2019-02-19 2023-02-22 Fike Corporation Passives explosionssicherheitsabsperrventil mit vertikal ausgerichteten klappen
US12072264B2 (en) 2019-10-07 2024-08-27 Onesubsea Ip Uk Limited Leak detection system for subsea equipment
JP7411992B2 (ja) * 2020-02-04 2024-01-12 満久 清水 換気装置
CN112503754B (zh) * 2020-10-19 2022-07-12 珠海格力电器股份有限公司 一种出风结构及具有其的空调器
CN113188186B (zh) * 2021-05-21 2022-08-16 西安建筑科技大学 立式空调送风调节及立式送风装置、送风调节方法及系统

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EP3436750A1 (de) 2019-02-06

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