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EP4276378A1 - Passage d'air - Google Patents

Passage d'air Download PDF

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Publication number
EP4276378A1
EP4276378A1 EP23172255.4A EP23172255A EP4276378A1 EP 4276378 A1 EP4276378 A1 EP 4276378A1 EP 23172255 A EP23172255 A EP 23172255A EP 4276378 A1 EP4276378 A1 EP 4276378A1
Authority
EP
European Patent Office
Prior art keywords
air
section
air outlet
cross
air passage
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.)
Pending
Application number
EP23172255.4A
Other languages
German (de)
English (en)
Inventor
Dietmar Rossbruch
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.)
Krantz GmbH
Original Assignee
Krantz 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 Krantz GmbH filed Critical Krantz GmbH
Publication of EP4276378A1 publication Critical patent/EP4276378A1/fr
Pending legal-status Critical Current

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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
    • F24F13/02—Ducting arrangements
    • F24F13/06—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser
    • F24F13/068—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser formed as perforated walls, ceilings or floors
    • 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
    • F24F13/072—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser of elongated shape, e.g. between ceiling panels
    • 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

Definitions

  • the present application relates to an air passage according to the preamble of claim 1.
  • the air passage comprises a housing, a connecting piece for connection to an air distribution system, an interior space delimited by the housing and an air outlet cross section.
  • the air passage can be used in particular for mounting in a ceiling space between a suspended ceiling and a shell ceiling, the air passage preferably being positioned on a ceiling plate of the suspended ceiling in such a way that the air outlet cross section of the air passage is arranged directly on an upper side of the ceiling plate.
  • a ceiling panel can in particular be a perforated ceiling panel, which is suitable for replacing an element that spatially delimits the air passage in the area of the air outlet cross section.
  • the air passage can therefore preferably be designed to be free of internals, in particular a perforated plate or the like, in the area of its air outlet cross section.
  • the connecting piece serves to connect the air passage with an air duct, by means of which supply air can be supplied to the air passage.
  • the housing of the air passage comprises an air outlet area, the end of which, viewed in the direction of flow of the supply air, is formed by the air outlet cross section.
  • the air outlet area has the shape of a truncated pyramid, which widens in the direction of flow of the supply air.
  • the air outlet area is therefore designed such that walls of the housing in the air outlet area with a plane formed by the air outlet cross section form an angle in the range between 5° and 20°, preferably between 7° and 15°, more preferably between 9° and 12.5° , lock in.
  • the air outlet area is logically separated from the rest of the interior by a first air passage cross section formed by a top surface of the truncated pyramid-shaped air outlet area.
  • the supply air which is supplied to the air passage through the connecting piece, therefore flows into the interior of the housing and leaves the interior through the air outlet cross section, the supply air within the interior starting from an air inlet area into which the supply air enters directly from the connecting piece or passes directly through the first air passage cross section into the air outlet area in the form of the truncated pyramid. From the air outlet area, the supply air finally exits the air passage through the air outlet cross section.
  • a base area of the Air outlet area and the first air passage cross section of the air outlet area are each rectangular, with a rectangular air guide element being arranged in the air outlet area, that is to say spatially between the first air passage cross section and the air outlet cross section.
  • An air passage of the type described above is already known in the prior art.
  • EP 2 860 467 A1 describes an air passage, comprising a connector for connection to an air supply system and a housing which delimits an air distribution space.
  • the housing has an air inlet surface through which air can be introduced into the air distribution space and which can be connected to the nozzle, the housing further having an air outlet surface arranged parallel to the air inlet surface through which the air leaves the air distribution space.
  • the housing is provided with walls which are arranged at an acute angle to the air outlet surface, the air passage having adjustment means for changing a flow direction of the air emerging from the air outlet surface, which can be transferred from a first position to a second position or in the opposite direction.
  • the well-known air outlet is particularly suitable for supplying supply air to a room in a manner parallel to the ceiling.
  • the supply air within the air passage rests against the walls in the air outlet area, whereby the supply air is deflected at an acute angle in relation to the air outlet cross section.
  • the supply air is therefore not released perpendicular to the respective ceiling panel, but at least essentially parallel to the ceiling panel, which means that drafts for the people who are in the respective room are avoided, particularly when cooling air is supplied.
  • This type of supplying a room with supply air has proven to be particularly advantageous for constructions in which the air passage and therefore the air outlet cross section have at least essentially a square cross section.
  • the design of such an air passage with a rectangular cross-section the length of which significantly exceeds the width, is problematic because the supply air is not reliably deflected in a direction parallel to the ceiling.
  • the present application is therefore based on the task of producing an air passage by means of which a ceiling-parallel flow of supply air is achieved with a rectangular shape of the air outlet cross section.
  • the air passage is characterized in that the air guide element is plate-shaped and is oriented parallel to the plane defined by the air outlet cross section.
  • the air guide element has a large number of perforations through which the supply air can flow. The perforations thereby together form a second air passage cross section.
  • the air guide element is arranged within the air outlet area in such a way that there is a free space extending all around the air guide element between an outer edge of the air guide element and the walls of the housing. This free space forms a third air passage cross-section through which the supply air can flow as it flows through the air outlet area.
  • the air guide element therefore logically divides the air outlet area into an initial section, into which the supply air passes directly from the air inlet area through the first air passage cross section, and an end section, from which the supply air flows out of the air passage directly through the air outlet cross section.
  • the supply air can flow from the initial section both through the air guide element and through the free space into the end section.
  • the air guide element is plate-shaped, which according to the present application is to be viewed as a two-dimensional component, the length and width of which exceeds the thickness of the plate many times over. In particular, the length and width of the plate exceed the thickness thereof by more than 100 times. If the air guide element has a rectangular cross section, the length of the plate can exceed its thickness by more than 200 times or more than 400 times. It becomes clear that the air guide element is a thin, flat component, with the supply air hitting the air guide element.
  • the air guiding element can, for example, consist of or have a perforated plate, a screen-printed fabric, a fabric or similar. Combinations are also conceivable. The advantage of arranging a fabric is the reduction of flow noise.
  • the supply air therefore first enters through the connecting piece into an air inlet area of the interior of the housing.
  • the supply air then flows through the first air passage cross section into the initial section of the air outlet area.
  • the air guide element is arranged, which logically divides the air outlet area into the initial section and the end section.
  • the air guide element forms the second air passage cross section with its perforations.
  • the supply air can therefore flow in parts through the perforations or through the second air passage cross section from the initial section into the end section of the air outlet area and in other parts - bypassing the air guide element - flow through the third air passage cross section formed by the free space.
  • the third air passage cross-section is not a structurally-related free space of small dimensions, but rather a deliberately intended free space with appropriately selected dimensions.
  • the free space can have a width all around that is between 1 cm and 4 cm.
  • the air passage according to the invention has many advantages.
  • the air outlet has a rectangular basic shape, which makes it particularly suitable for use on narrow ceilings.
  • the uniform distribution of the supply air both to the narrow sides of the air outlet cross-section and to the long sides of the air outlet cross-section is achieved by means of the air guide element, which develops a throttling effect in a central region of the air outlet region, since a flow resistance that opposes the supply air due to the air guide element is greater than in the edge side circumferential free space that extends between the edge of the air guide element and the wall of the housing.
  • the air guide element therefore causes a large part of a supply air volume flow to pass through the free space or the third air passage cross section from the initial section into the end section of the air outlet region in the course of the flow through the air outlet area and only a smaller part of the flow through the perforations or the second air passage cross section into the Crosses the end section. Since the free space is assigned to the pointedly inclined walls of the housing, which make up the truncated pyramid-shaped shape of the air outlet area, it is achieved that the supply air within the air outlet area is specifically directed to the walls and is then applied to the walls.
  • the second air passage cross section which is formed by the sum of all the perforations of the air guide element, has the effect that the supply air - although it is primarily intended to pass from the initial section into the end section of the air outlet area through the third air passage cross section - does not accumulate on the air guide element and completely to the side must be diverted towards the open space. It has been shown that a flow characteristic is disadvantageous in such a design, so that the perforations of the air guide element are important for the targeted outflow of supply air in a direction parallel to the ceiling in relation to the respective ceiling panel.
  • the air guiding element is formed by a plate, preferably made of metal or plastic, in particular by a perforated sheet metal. Furthermore, it can be advantageous if a proportion of a free area defining the second air passage cross section, i.e. the sum of all areas of the perforations, based on a total area of the air guide element, is between 5% and 20%, preferably between 7% and 15%.
  • the thickness of the air guide element is between 0.25 mm and 2.0 mm, preferably between 0.5 mm and 1.5 mm. This configuration has proven to be particularly advantageous since the air guide element takes on the desired local throttle function, which results in a significant portion of the supply air being diverted to the third air passage cross section. However, as desired, the perforations have little influence on the direction of flow of the portion of the supply air that passes through the second air passage cross section into the end section of the air outlet area.
  • the air guide element is attached to the housing. This can be done in particular by means of individual tabs which are connected, for example, to corners of the air guide element.
  • the air guide element can be attached to the housing in such a way that - with the exception of the respective fastening elements - it hangs freely within the air outlet area, so that the free space surrounding the edge is at least essentially freely available as an air passage cross section for the supply air. There is therefore no obstacle to the supply air in the area of the free space or the third air passage cross section that would hinder the flow of the supply air.
  • a narrow side of the free space which describes a minimum distance from a respective point on the edge of the air guide element to the wall of the housing, has a length that is between 3% and 8%, preferably between 4% and 7% Width corresponds to the base area of the air outlet area.
  • the narrow side is defined as the narrowest point of the cross section of the free space, which defines the third air passage cross section.
  • such a design of the air passage can be advantageous in which a ratio of a length of the air outlet area to a width of the air outlet area is between 1.5:1 and 5:1, preferably between 2:1 and 4:1.
  • such a configuration of the air passage according to the invention can be particularly advantageous, in which the air guiding element is arranged in a lower half, preferably in a second quarter (viewed from the base area of the air outlet region), of the air outlet region in relation to a vertical axis of the air outlet region. Tests have shown that this arrangement is particularly advantageous for the flow of supply air into the respective room through a respective ceiling tile.
  • the air passage between the air inlet area and the air outlet area has a transition area, which is preferably at least essentially cuboid-shaped.
  • the first air passage cross section which is formed by the top surface of the truncated pyramid-shaped air outlet area, forms the boundary cross section between the transition area and the air outlet area.
  • walls of the housing of the air passage which laterally delimit the transition region, are slightly inclined relative to a vertical, preferably in a range between 1° and 8°, more preferably between 2° and 6°. Therefore, configurations of the transition area in which the walls are inclined in the manner described are also to be understood as “essentially cuboid” in the sense of the present application.
  • the provision of a transition area has proven to be advantageous for equalizing the flow of supply air before entering the air outlet area.
  • an advantageous embodiment of the invention provides that the air guide element is arranged within the air outlet area and the air outlet area is therefore logically divided by means of the air guide element into an initial section located above the air guide element and an end section located below the air guide element. Accordingly, as soon as the supply air has passed through the first air passage cross-section into the air outlet area, it is initially in the initial section of the air outlet area, from which the supply air can pass through both the second air passage cross-section and through the third air passage cross-section into the end section of the air outlet area. Due to this arrangement of the air guide element, the air exits laterally horizontally and divided under the air guide element. Due to the fact that the air guide element is permeable to air or "porous", the underside of a perforated ceiling panel, on which the air passage is arranged, remains free of airborne dust and dirt particles.
  • a ratio of the cross-sectional area of the air outlet cross-section based on the cross-sectional area of the connecting piece is in a range from 2 to 7, preferably in a range from 3 to 6. With such a cross-sectional ratio there is a particularly good flow through the air passage, on the one hand providing sufficient supply air and on the other hand achieving an optimal flow speed and outflow direction.
  • a central axis of the connecting piece runs orthogonally to a vertical axis of the air passage. This is particularly advantageous in view of the reduced space requirement when installing in a ceiling system.
  • an embodiment that is in the Figures 1 to 7 includes an air passage 1, which includes a housing 2 , which spatially surrounds an interior 4 .
  • the air passage 1 has a basically rectangular shape, as follows.
  • the air passage 1 includes a connecting piece 3 which opens into a connection box 24 . This is particularly good based on the Figures 1 and 2 recognizable.
  • Supply air supplied to the air passage 1 by means of the air distribution system can in this way enter an air inlet area 26 of the interior 4 through the connecting piece 3.
  • the air inlet area 26 is formed by an interior of the connection box 24 .
  • the supply air flows into a transition area 25 and finally an air outlet area 6 , which is designed in the shape of a truncated pyramid. This is expressed in the fact that walls 7 of the housing 2 in the air outlet region 6 run inclined at an acute angle 21, which here is approximately 10°, relative to a plane 8 which is formed by a base surface 10 of the air outlet region 6 .
  • the supply air exits the air passage 1 through an air outlet cross section 5 .
  • the air outlet cross section 5 is defined by the base area 10 of the air outlet area 6 , as can be seen particularly well from the Figures 4 and 6 results.
  • the base area 10 is rectangular and has a length 17 of approximately 60 cm and a width 18 of approximately 30 cm.
  • the ratio of the length 17 to the width 18 here is 2:1. This is particularly clear from: Figure 3 .
  • the present air passage 1 comprises a transition area 25, which is essentially cuboid-shaped.
  • the transition area 25 has a cross section that is widened compared to the connection box 24 , with the walls 7 of the housing 2 being oriented almost vertically in the transition area 25 .
  • the walls 7 in the transition region 25 form an angle of approximately 3° with the vertical. This is particularly clear from the Figures 5 and 7 .
  • the supply air flows from the air distribution system (not shown) through the connecting piece 3 into the air inlet area 26 and exits there into the transition area 25 .
  • the supply air then passes through a first air passage cross section 9 into the air outlet area 6 .
  • the first air passage cross section 9 is accordingly formed by a top surface of the truncated pyramid-shaped air outlet region 6 . This is particularly clear from the sectional views according to Figures 5 and 7 .
  • an air guide element 11 is arranged within the air outlet area 6, ie between the first air passage cross section 9 and the air outlet cross section 5, which is fastened here to the housing 2 by means of tabs 22 .
  • the air guide element 11 is plate-shaped and is formed here by a perforated plate which is oriented parallel to the base surface 10 or the air outlet cross section 5 . As such, it has a plurality of perforations 12 , which together define a second air passage cross section 13 .
  • the air guide element 11, which here has a thickness of approximately 1.0 mm, is arranged within the air outlet area 6 in such a way that it does not adjoin the walls 7 of the housing 2 on the edge.
  • a free space 14 extends around the edge between an edge 20 of the air guide element 11 and the walls 7 , through which supply air can also flow.
  • the free space 14 therefore defines a third air passage cross section 15.
  • the air outlet area 6 is therefore logically divided by means of the air guide element 11 into an initial section 27 located above the air guide element 11 and an end section 28 located below the air guide element 11 .
  • the supply air has passed through the first air passage cross section 9 into the air outlet area 6 , it is initially in the initial section 27 of the air outlet area 6, from which the supply air flows through both the second air passage cross section 13 and through the third air passage cross section 15 into the end section 28 of the air outlet area 6 can be exceeded.
  • the supply air exits through the air outlet cross section 5 from the air outlet area 6 and therefore from the air passage 1 .
  • the air guiding element 11 which is arranged here in relation to a vertical axis 19 of the air outlet area 6 in a lower half of the air outlet area 6, namely at approximately 40% based on a height of the air outlet area 6 , has the effect of opposing the supply air as a flow resistance, whereby the supply air is deflected proportionally to the edges 20 of the air guide element 11 and therefore to the free space 14 or the third air passage cross section 15 . Consequently, a large part of the supply air passes from the initial section 27 into the end section 28 through the third air passage cross section 15 , while only a smaller part of the supply air flows through the second air passage cross section 13 .
  • the supply air is intentionally pointed tapering walls 7 of the air outlet area 6, whereby a flow direction oriented almost parallel to the air outlet cross section 5 is imposed on the supply air. Accordingly, this ensures that the supply air flows at least essentially in a direction parallel to the ceiling when it exits the air passage 1.
  • the perforations 12 of the air guide element 11 are each circular, with a proportion of the second air passage cross section 13 formed by the perforations 12 of a total area of the air guide element being here approximately 10%. Furthermore, the air guide element 11 is matched to the housing 2 in such a way that a narrow side 16 of the free space 14 has a length 23 of approximately 15 mm. By definition, the narrow side 16 extends between a respective point on the edge 20 of the air guiding element 11 and a nearest point on a respective wall 7 of the housing 2. This is particularly clear from Figure 5 .

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Duct Arrangements (AREA)
  • Air-Flow Control Members (AREA)
EP23172255.4A 2022-05-10 2023-05-09 Passage d'air Pending EP4276378A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102022111586.0A DE102022111586A1 (de) 2022-05-10 2022-05-10 Luftdurchlass

Publications (1)

Publication Number Publication Date
EP4276378A1 true EP4276378A1 (fr) 2023-11-15

Family

ID=86330733

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23172255.4A Pending EP4276378A1 (fr) 2022-05-10 2023-05-09 Passage d'air

Country Status (2)

Country Link
EP (1) EP4276378A1 (fr)
DE (1) DE102022111586A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4616558A (en) * 1984-11-01 1986-10-14 Total Air, Inc. Gaseous fluid distribution devices
WO2008098747A1 (fr) * 2007-02-15 2008-08-21 Caverion Gmbh Sortie d'air et procédé pour sa fabrication
EP2860467A1 (fr) 2013-10-11 2015-04-15 Caverion Deutschland GmbH Sortie d'air

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4616558A (en) * 1984-11-01 1986-10-14 Total Air, Inc. Gaseous fluid distribution devices
WO2008098747A1 (fr) * 2007-02-15 2008-08-21 Caverion Gmbh Sortie d'air et procédé pour sa fabrication
EP2860467A1 (fr) 2013-10-11 2015-04-15 Caverion Deutschland GmbH Sortie d'air

Also Published As

Publication number Publication date
DE102022111586A1 (de) 2023-11-16

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