EP3434998A1 - Dispositif d'aération - Google Patents

Dispositif d'aération Download PDF

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Publication number
EP3434998A1
EP3434998A1 EP18184206.3A EP18184206A EP3434998A1 EP 3434998 A1 EP3434998 A1 EP 3434998A1 EP 18184206 A EP18184206 A EP 18184206A EP 3434998 A1 EP3434998 A1 EP 3434998A1
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EP
European Patent Office
Prior art keywords
ventilation
ventilation device
slots
air
ventilation element
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP18184206.3A
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German (de)
English (en)
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EP3434998C0 (fr
EP3434998B8 (fr
EP3434998B1 (fr
Inventor
Beat Schönbächler
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KST AG
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KST AG
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Publication of EP3434998C0 publication Critical patent/EP3434998C0/fr
Publication of EP3434998B1 publication Critical patent/EP3434998B1/fr
Publication of EP3434998B8 publication Critical patent/EP3434998B8/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
    • 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
    • F24F2013/0608—Perforated ducts
    • 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
    • F24F2013/0612—Induction nozzles without swirl means

Definitions

  • the invention relates to a ventilation device according to claim 1, a ventilation device with such ventilation devices according to claim 23, and a method for operating such a ventilation device according to claim 24.
  • Induction is understood to mean the proportion of room air which is entrained or entrained by the primary air flow supplied by means of the ventilation device.
  • an induction number of 10 means that, for example, 1 m 3 primary air flow by a factor of 10 more, ie 10 m 3 room air moves.
  • a better mixing of the room air is achieved if the induction number of the ventilation device is as large as possible.
  • standards eg the Swiss SIA standard 382/1, corresponding to EN 13779 should be adhered to in order, for example, to guarantee the freedom of movement of such a ventilation device.
  • the permissible room air velocity according to SIA standard 382/1 at 50% humidity, depending on the room temperature, is between approx. 120 m / s at 20 ° C and approx. 170 m / s at 26 ° C.
  • surface load is understood to mean the volume flow of the supply air per time and the active surface area through which it flows in m 3 / (hm 2 ).
  • Inactive areas are air-impermeable areas of a ventilation element in which the slot pattern is either covered, closed or missing.
  • row distance is understood here to mean the usual term in air conditioning technology, namely the distance from the outlet opening, at which the supply air or there already mostly mixed air flow is braked to a speed of 0.25 m / s.
  • FIG. Fig. 1A and Fig. 1B the principle shown there will be described with reference to a first embodiment, which in FIG Fig. 1A and Fig. 1B is shown.
  • Ventilation devices 10 which are designed for installation in a room 1. These ventilation devices 10 may be designed for ventilation, air conditioning and / or heating. Preferably, it is Ventilation devices 10 for air conditioning, which cause a cooling effect in the room 1 by an air flow L1 is supplied, the temperature of which is below the temperature of the room air in the room 1.
  • the ventilation device 10 comprises a planar ventilation element 100 with air passage openings facing in the direction of the space.
  • the planar ventilation element 100 may extend parallel to a ceiling.
  • An outflow box 20 is arranged in this embodiment on a rear side opposite the spatial direction 101 of the ventilation element 100.
  • an air supply 21, 22 is provided inside the Abströmkastens 20, an air supply 21, 22 is provided for supplying an air flow L1.
  • the ventilation element 100 comprises a plurality of punching slots 102, which serve as air passage openings.
  • Each of the punching slots 102 has a slot length L between 2 and 10 mm and a slot width W between 0.1 and 0.8 mm, such as in FIG Fig. 5B shown.
  • the ratio between slot length L and slot width W is therefore between 2.5 and 100 in all embodiments.
  • the rear side 101 of the ventilation element 100 has a regular arrangement of depressions 106 (see, for example, FIGS Fig. 6B ) formed opposite a rear (main) plane E of the ventilation member 100 in the space direction. That is, these depressions are lower on the back side 101 than the level of the rear (main) plane E.
  • Fig. 7A corresponds essentially to the example already in the Figures 6A and 6B is indicated.
  • the recesses 106 which surround the punching slots 102, here have a nearly rectangular shape.
  • the total area GFV of all depressions 106 (without the total area of the punching slots 102, 102 ') is smaller here than the total area GFN, which lies at the normal level of the (main) plane E.
  • Fig. 7B differs from the example in Fig. 7A in that on the one hand the recesses 106, which surround the punching slots 102, a slightly oval Have shape. In addition, the area of these recesses 106 is greater than in Fig. 7A , Additionally or alternatively, further depressions may be provided on the rear side 101. In Fig. 7B it is indicated that, for example, a depression 108 can be located centrally between in each case four punched slots 102, 102 '. This sink 108 may be of any shape that may be produced by stamping, deep drawing, stamping, pressing, hammering, or a similar forming process.
  • a mat eg a nonwoven
  • This mat can be placed loose in the discharge box 20 or fixed on the back 101.
  • Such a mat can be used in all described embodiments.
  • FIG. 1B A schematic diagram is in Fig. 1B shown.
  • Fig. 1B is a single air passage opening 102 can be seen, which extends from the back 101 through the vent member 100 to the front 103.
  • the different length arrows of the primary air flow L2 indicate the velocity vectors of this primary air flow L2.
  • the velocity is greater than at the edge of punched slot 102.
  • each of the fine primary airflows L2 induction induces additional airflows (referred to herein as secondary airflows), which in Fig. 1B labeled L3. That is, each of the fine primary air flows L2 entrains air from the space R, resulting in rapid mixing of the fresh air L1 with the indoor air.
  • the total of the fine primary air flows L2 set in motion amount of air is always larger by the induced secondary air L3, while the speed increases with increasing Distance from the ventilation element 100 in the direction of space is becoming smaller.
  • the punching slots 102, 102 have a slot length L between 2 and 10 mm and a slot width W between 0.1 and 0.8 mm.
  • the extreme values resulting from these ranges are compared with a circular air passage opening with the same area.
  • the R of the punch slot 102 here corresponds to 1.96 times the R of the circle.
  • the device 10 provides better results when the air flow L1 first undergoes a deflection or deflection after entering the outflow box 20 in order to "flow" as far as possible along the rear side 101 of the ventilation element 100 (as in FIG Fig. 1B indicated by the horizontal arrow L1), before the passage through the air passage openings 102 in the direction of the space 1 takes place.
  • the recesses 106 play a role. Among other things, these recesses 106 cause the air flow L1 not to "flow" too quickly over the rear side.
  • the ventilation element 100 assumes by convection almost the temperature of the room 1 at. If now a colder to L1 air flow L1 with the venting element 100 comes into contact, because a quantity of heat Q is transferred from the venting element 100 to the air flow L1. The air flow L1 heats up and the ventilation element 100 cools down. It is therefore important here that the residence time of the colder air flow L1 on the rear side 101 of the ventilation element 100 is as large as possible. This is effected according to the invention inter alia by an interaction of the air flow L1 with the depressions 106. These recesses 106 cause a local swirling or braking of the air flow L1. In addition, they increase the effective surface area.
  • the recesses 106 offset by an offset V with respect to the level of the (main 5) plane E of the back 101 back.
  • V is preferably 0.1-2 mm.
  • the recesses 106 are preferably configured to surround each punch slot 102.
  • the depressions 106 preferably have a surface (without the actual punching slot surface F), which corresponds to approximately 1 to 5 times the punched slot surface F.
  • Fig. 6B an embodiment is shown in which the surface of the recesses 106 corresponds to about 2 times the punch slot surface F.
  • a free cross-section FQ which is in the range between 3 and 20%.
  • a better mixing of the room air is achieved when the induction number of the ventilation device 10 is as large as possible.
  • standards eg SIA standard 382/1 should be adhered to, for example as regards the freedom of movement of such a ventilation device 10.
  • induction numbers of up to 10 can be achieved, which means that, for example, 1 m 3 primary air flow L2 moves about 10 times more room air.
  • the performance of the ventilation device 10 plays a major role, since the performance in principle has a direct relationship to the economy and the cost of a ventilation device 10, including all ancillary components.
  • Ventilation devices 10 which are supplied with an air flow L1 having a ⁇ T between 2 and 10 degrees Celsius, have proven particularly useful. In the present case, however, ⁇ T can be between 4 and 12 degrees Celsius. However, larger ⁇ T values can lead to unfavorable and unpleasant drafts in room 1.
  • the ventilation devices 10 are preferably dimensioned and the ancillaries are designed so that a power of over 50 m 3 / h per m 2 area of the ventilation element 100 is achieved without a ⁇ T must be specified, which is greater than 18 degrees Celsius.
  • a metal plate e.g., chromium steel having a thickness D between 0.5 and 2 mm is used as the venting member 100.
  • a metal plate e.g., chromium steel
  • Such a metal plate can be processed in the required manner by punching or slitting so that on the one hand the punching slots 102 and on the other hand, the recesses 106 are formed with the dimensions already given above.
  • the term "punching” is used to describe a method in which a punching, cutting or slotting tool penetrates into the sheet material to produce the punching slots 102 there. When punching the Edge of the punching slots are trimmed, so as to produce the recesses 106 in one operation.
  • the term “punching slot” is therefore not intended to be limited to slots made by classical stamping, but is intended to include slots made by cutting or slitting.
  • a regular arrangement of the punching slots 102 is used with a line grid with a line spacing Z1 of 1 to 15 mm and with a column spacing of 1 to 10 mm.
  • the column spacing preferably corresponds to the slot length L, as in FIG Figs. 5A and 5B can be seen.
  • the column spacing may also be greater or smaller than the slot length L.
  • the column spacing is between 0.5 times L and 2 times L.
  • the punched slots 102 are preferably offset from each other as shown in the various figures. They can be arranged on "gap", as in Fig. 5B to recognize, but they can also partially overlap each other, as in Fig. 8 shown.
  • the venting element 100 In order to make the ventilation element 100 visually appealing, it should be adjusted in color. Conventional painting processes and paints are not suitable, as there is a risk of adding the punched slots and thus adversely affecting the ventilation effect.
  • the venting element 100 is therefore coated with a fine layer powder to prevent clogging.
  • the ventilation element 100 can be formed as a flat plate or trough or trough-shaped.
  • a flat plate is used as a ventilation element 100 is used.
  • the Figures 2 and 4 are tray-shaped or trough-shaped embodiments shown.
  • the two embodiments of the FIGS. 1A and 2 differ essentially only by the shape of the ventilation elements 100 from each other. All other elements can be identical or similar.
  • the air supply takes place here through an air supply channel 21 with at least one toward the rear side 101 of the vent member 100 facing air nozzle 22. These elements of the air supply are arranged so that an air flow through the air supply passage 21 and from there through the air nozzle (s) 22 in the Outflow box 20 can flow.
  • the two embodiments of the FIGS. 3 and 4 differ substantially only by the shape of the ventilation elements 100 from each other.
  • the air supply is constructed somewhat differently.
  • the air supply here comprises a Anströmkasten 23 with an air duct 25 and at least one air nozzle 24. These elements of the air supply are arranged so that an air flow through the air duct 25, for example laterally into the Anströmkasten 23 and from there through the air nozzle / n 24 in the Outflow box 20 can flow.
  • these two embodiments behave similar to the embodiments of the FIGS. 1A and 2 ,
  • the embodiments shown in addition to the advantages already mentioned also have the advantage that they offer a very good acoustic damping.
  • the good acoustic damping results from the self-absorbing effect of the planar ventilation element 100 with punched slots 102.
  • the ventilation devices 10 according to the invention provide better performance (air introduction with greater undertemperatures) by the use of the areal ventilation elements 100 (based on the square meter of the areal ventilation elements 100), it is possible to build significantly smaller-area ventilation outflow surfaces which nevertheless remain in a room 1 produce the same cooling effect as ventilation systems with a large-area ventilation outflow surface or conventional air inlets with air outlets. If a conventional ventilation system e.g. with a maximum undertemperature of 8K draft-free (acc. to SIA 382/1), a ventilation device with appropriate slitting of the ventilation element can already feed approx. twice the power (low temperature 16 K) into the room without pulling.
  • Such ventilation devices 10 can be used in the ceiling, wall and floor area of a room 1.
  • planar ventilation elements 100 can be used as an element of a cooling ceiling with activation, ie with water cooling, or as an element of a ventilation device 10, as described.
  • Ventilators have already brought a significant improvement, there is still a need to effectively air-condition even large rooms with the smallest possible cooling devices without causing disturbing drafts.
  • Such ventilation devices should be used not only in the ceiling, wall and floor area but also in corner areas.
  • the supply air flow dissolves substantially perpendicular to the surface of the ventilation element and generates a high induction effect by entrainment of laterally nachströmenden room air.
  • high throw lengths can be achieved and at the same time, probably by the small-scale change of nozzle-like high-speed out of the slots outflowing incoming air and between nachfliessender, swirled room air, drafts are avoided.
  • the limits mentioned below between 100 and 150 Pa pressure difference should not be exceeded.
  • a ventilation device which, in the installed state, has a planar ventilation element with air passage openings which faces in the direction of the space, wherein a discharge box is arranged on a rear side of the ventilation element which is opposite to the spatial direction is provided with an air supply for supplying an air flow and the ventilation element in a known manner has a plurality of slots arranged in rows and columns slots as air passage openings.
  • the slots each have a slot length (L) of 2 to 20 mm and a slot width (W) of 0.1 to 0.8 mm, preferably from 0.2 to 0.6 mm;
  • the line spacing (Z1), ie the distance between the non-offset lines, is 1 mm to 15 mm.
  • the offset can be of the order of approximately 1 to 2 slot lengths.
  • the slot lengths and slot widths of the offset lines in the areas as indicated above may be different or equal to the dimensions of the slots in the non-offset lines.
  • the column grid (S1), ie the distance between the columns, in particular between the columns of the same row height is 0.5 x L to 2 x L, ie 1 to 20 mm.
  • the column spacings are preferably the same on both sides. Adjacent columns with staggered rows can be arranged flush or overlapping.
  • the ventilation element comprises at least one active surface area O A and at least one inactive surface area O I and for at least one characteristic dimension x A , for example the length, width, height, diameter, etc. of the active surface area O A : 3 L ⁇ x A ⁇ 50 L . preferred 4 L ⁇ x A ⁇ 35 L ,
  • Under active surface area O A here is a ventilation-active surface area, ie a surface with a grid as mentioned above, in the air can flow through the slot grid, while in inactive surface areas O I of the slot grid either covered or not provided from the outset. Similar or also the same dimensions of a characteristic dimension x I can be set for the inactive surface area: 3 L ⁇ x A ⁇ 50 L . preferred 4 L ⁇ x I ⁇ 35 L ,
  • the characteristic dimensions of the active surface area O A and the inactive surface area O I were determined in the examples: 6 mm ⁇ (O A or O I ) ⁇ 1000 mm, preferably 8 mm ⁇ (O A or O I ) ⁇ 350 mm.
  • the grid should comprise at least three rows and three columns, but preferably at least 4 rows and 4 columns. Therefore, the minimum width of each active element should have an appropriate width.
  • the rear side of the ventilation element can have a regular arrangement of depressions as described above, which are formed in the spatial direction with respect to the level of a rear plane (E) of the ventilation element.
  • the surface of the ventilation element may be flat, cylindrical or prismatic. Under zylinderisch and prismatic here only partially cylindrical or partially prismatic trained surfaces are understood, as for example. For the use of so-called Eckschern, i. For example, quarter-cylinder ventilation devices that are used in a room corner, find use. With regard to the prismatic forms, reference should be made in particular to advantageous embodiments with regular hexagons or octagons or their semi- or quarter-prismatic embodiments.
  • the surface of the ventilation element may comprise alternately arranged active surface areas (O A ) and inactive surface area (O I ). Examples of these are strip-shaped, wave-shaped or checkerboard-like arrangements. Alternatively, multiple active surface areas (O A ) or multiple inactive surface areas (O I ) may be distributed in an inactive or active field on the surface of the vent element. For example. As rectangles or rhombohedron arranged active or inactive surface areas in an inactive or active field as circles, ellipses, three, four or other polygons, for example.
  • the ratio of the active surface areas (O A ) to the inactive surface area (O I ) can be as follows: 0.2 ⁇ O A / O I ⁇ 0.6 . preferred 12:25 ⁇ O A / O I ⁇ 12:55
  • the device may be at least partially or as a whole cylindrical or prismatic, with each other in a direction of a cylinder or prism axis cylindrical or prismatic active surface areas (O A ) of the ventilation element (100) alternate with cylindrical or prismatic inactive surface areas the height h A is the characteristic size of the active surface area and the height h I is the characteristic size of the inactive surface area.
  • This embodiment is suitable, for example, for columnar, vertical or, for example, also for tubular devices which are installed parallel to a ceiling.
  • the height of the cylindrical or prism-shaped active surface area can be 60 to 180 mm, preferably 100 to 140 mm. In the case of small heights of the cylinder-shaped or prism-shaped surface areas, these are also referred to below as annular or as rings.
  • an at least partially or as a whole cylindrical or prismatic device formed at least one cylinder segment or at least one prism segment of the surface of the ventilation element a continuous, or interrupted only at greater intervals active and / or a corresponding inactive surface area (O A , O I ) ,
  • active and inactive surface areas can advantageously be used here be arranged along the circumference, parallel to the cylinder or prism axis.
  • the slot grid can be formed substantially on the entire surface of the ventilation element, which, as is familiar to the expert, edge areas, for example, be excluded for processing reasons, and the inactive surface areas (O I ) of the ventilation element can be formed by planar covers.
  • the cover can be formed by a sheet of foil or a paint covering the slots and in principle be mounted on the inside or the room side facing the room side of the ventilation element.
  • the sheet or foil may be glued or, in particular, simply clamped when attached to the inside.
  • the cover may comprise an elastic, completely or partially cylindrical or wholly or partially prismatic curved foil or sheet, which is clamped or glued to the ventilation element in the device which is at least partially cylindrical or partially prismatic, for example.
  • the ventilation element may comprise a metal plate with a thickness (D) of between 0.5 and 2 mm, or be manufactured as a whole from such a metal plate.
  • the material may, for example, a sheet, for example. From electrolytically galvanized (ECG), stainless steel or aluminum.
  • the slots can be introduced into the material as mentioned above, whereby a ratio (V) of the punch slot circumference (U) to the punch slot surface (F) is, for example, between 2.7 and 22 can.
  • the free cross section (FQ) per unit area of the active surface O A of the ventilation element can be in the range of 1 to 20%, preferably in the range of 2 to 10%.
  • each punched slot can be surrounded by a depression and / or depressions can be provided between the punching slots, in each case on the side of the ventilation element facing the outflow box.
  • At least one further row of slots can be arranged between the rows of the grid in a half line spacing Z1 / 2.
  • the slots of the further line can be offset relative to the x-axis, preferably being arranged offset symmetrically with respect to the slots of the two immediately adjacent lines.
  • the slots of the rows and the slots of the further rows form an overlapping, flush or spaced-apart arrangement of columns.
  • the slots of the further line can each have a slot length (L) between 2 and 10 mm and a slot width (W) between 0.1 and 0.8 mm and also have the same geometry as the slots of the adjacent rows.
  • the air supply of the ventilation device may comprise an air supply channel with at least one pointing in the direction of the rear of the ventilation element air nozzle, said elements of the air supply are arranged so that an air flow through the air supply channel and from there through the at least one air nozzle can flow into the outflow box.
  • the ventilation device can also be a Anströmkasten with air duct and at least as stated above an air nozzle, wherein these elements of the air supply are arranged so that an air flow through the air duct in the Anströmkasten and from there through the at least one air nozzle can flow into the outflow box.
  • Anströmkasten and / or Abströmkasten may also be cylindrical or prismatic in cylinder or prism-shaped ventilation devices.
  • a larger diameter / circumference cylinder or prismatic exhaust box may include a smaller diameter / circumference cylinder or prism shaped inflow case.
  • the present invention also includes a ventilator having a plurality of ventilation devices as set forth above.
  • the present invention also encompasses a method for operating a ventilation device or a ventilation device as explained above, the device having an air throughput of 100 to 2000 m 3 / h, preferably 500 to 1400 m 3 / h per square meter of active area is operated.
  • the device can be operated with a pressure difference between the inside facing the outflow box and the space facing the outside of the planar ventilation element, wherein the pressure difference in a range of 17 to 150 Pa, thereby preferably adjusted from 20 to 100 Pa.
  • the induction number ie the ratio of the entrained secondary air quantity to the imported primary air quantity in the near field, for example at a distance of 800 mm from the Surface, in particular of a central region of an active surface of the ventilation unit can be adjusted from 5 to 20, preferably from 10 to 15, which corresponds to a very high value.
  • the temperature quotient between the temperature of the supply air and the temperature of the mixed air (from room and supply air) was determined at a distance of 800 mm and related to the volume flow.
  • inventive ventilation devices are particularly well suited for constant continuous operation. Good controllability can be achieved if, for example, a ventilation device comprising several ventilation devices is operated in such a way that, depending on the desired ventilation requirement, individual ventilation devices are switched on or off.
  • the invention includes all here not explicitly mentioned in examples combinations of individual features that are disclosed only in connection with another embodiment, as long as such a combination would not be recognized from the outset as contrary to the skilled person. Likewise, the invention also relates to corresponding combinations of an inventive feature with one of CH 702 748 characteristic inherited as state of the art.
  • the experiments were carried out in a large-scale laboratory with 3'350 mm room height and a base area of 4'200 x 6'500 mm, and filmed with a video camera.
  • a ventilation pipe with a length of two meters and a diameter of 200 mm was mounted horizontally to the ceiling at a suspension height H (ie the distance between the center of the pipe and the ceiling).
  • the room temperature was set at about 26 ° C, the supply air by about 5 K lower.
  • the supply air flow was regulated with an iris diaphragm (nominal diameter 125 mm) at the inlet air inlet of the pipe. In position 1, the iris diaphragm is completely 100% open.
  • the other details given in the table relate to the following information: The test number; the suspension height; in each case from the ceiling to the center of the pipe / axis, measured in millimeters; the covered, in this case masked area (area in m 2 ); the additional area covered by bridges or sockets; the free area; the corresponding surface load in m 3 / (h * m 2 ), which results from the likewise indicated volume flow V '(in m 3 / h) of the supply air; the setting of the iris diaphragm; the supply air T ZUL and the room temperature T room in ° C; the difference temperature ⁇ T between space and supply air in K; the pressure difference ⁇ P ST between the overpressure inside the pipe and in the room; the measurement heights for measuring the air velocity in space measured in cm from the floor level of the test room; and the corresponding air speeds V AIR in mm / s (mean over 180 seconds).
  • a substantially vertically downwardly directed flow L6 forms, which spreads laterally only in the bottom area, which can cause noticeable drafts both under the ventilation and in the floor area.
  • velocities of between 185 and 300 mm / s were measured at a height of 180 cm at a measuring tree positioned below the pipe 10 at a distance from the pipe axis. The distance was set so that the measuring tree stood in a previously determined by flue gas tests area of the largest cold air drop (highest flow velocity). Tests numbered 1, 2, 6, 7 and 9 refer to such an experimental setup.
  • the room air is thereby entrained by the supply air as indicated by the arrows L8 and L8 '.
  • This mixture of supply air and room air then sinks over a large surface area relatively low speed.
  • the flow rate in 180 cm height is clear, for example. From 210 to 140 mm / s (see experiment 8 to experiment with the prior art arrangement in experiment 7) or, for example. From 300 to a range between 110 and 200 mm / s (compare Experiments 11, 12, 13, to prior art experiment in experiment 9).
  • Fig. 10A shows the schematic flow pattern of a columnar, vertical ventilation device 10 of the prior art, determined in a cloud chamber, in which the major part of the cylindrical surface is designed as an active surface O A with a slot grid as described above.
  • a tree-shaped flow pattern L4 which develops here symmetrically around the device. Details for such a test with a 2 m high column with 200 mm diameter are Table 3, Experiment 16, the geometric arrangement of the Figures 16 refer to.
  • the ventilation arrangement 10 consists of a base plate 26, a 150 mm high base 27, the columnar ventilation element 100 set thereon and the air supply not shown here.
  • the flow rate measured at a distance of half a meter from the tube, at 130 and 180 cm, is very low at 30 mm / s, see the column "Air velocity in the room", and thus the ventilation is inadequate. Due to the relatively rapid drop in this much cooler, poorly mixed supply air, can also develop at a relatively low ventilation performance as perceived as unpleasant pulling behavior near the ground, despite the ventilation effect in the rest of the room is very low.
  • FIG. 10B schematically shows the flow pattern of a columnar, vertical ventilation device 10 according to the invention, in which cylindrical active and inactive surface areas O A , O I are annularly arranged in alternating sequence.
  • the nozzle effect of the slot grid under otherwise identical experimental conditions significantly increased, thereby, in combination with the corresponding geometric dimensions, in particular the active surface areas O A , the supply air L5 completely and substantially perpendicular to the active cylinder surface O A replaces and at the same time entrains room air in the form of a vortex flow L6 from the adjacent areas.
  • the heights of the cylinders with active and inactive surface h A and h I can be considered.
  • any tubular venting device the use of a venting element (100) having a plurality of alternately arranged annular or semi-annular active and inactive surface areas has proven to be advantageous in operation.
  • a greater pressure difference between the interior of the tube and the environment can be built, which allows the occurrence of a spray effect with increased throw and induction and also a greater cooling / heating capacity.
  • FIGs. 11A to 11C Further examples of the distribution of surfaces, especially for large-area ventilation devices with a total area, for example, greater than 1 or 2 m 2 , are in Figs. 11A to 11C shown.
  • Fig. 11C an arrangement circular active surface area O A in an inactive field O I of a planar ventilation element 100, which may be formed in a plane or, for example, as a quarter, half or full cylinder.
  • the diameter d A can be considered.
  • a characteristic size of the inactive surface can be considered unspecified diameter (double arrow) of the dashed, inserted between the active surfaces circle.
  • the indication of a characteristic size or dimension x I for the inactive surface area can only be advantageous if the area of the ventilation element in the direction of both surface coordinates is greater than the characteristic size or dimension x A of the active surface area. In particular, greater than twice the dimension x A of the active surface area.
  • Fig. 11B shows a corresponding ventilation element 100 with alternately strip-shaped active and inactive surface areas O A and O I with corresponding characteristic dimensions b A , b I.
  • Fig. 11C shows a checkerboard-like arrangement, but in which the inactive surface areas O I in two directions are strip-shaped continuously formed and form intersecting, here orthogonal corridors through which the room air can flow particularly easily in the direction of the active surface areas O A. This allows the induction effect above all else be further improved with large-area ventilation elements 100.
  • Characteristic dimensions here are the side length (s) s A of the active area O A and the corridor width (n) s I of the inactive areas O I.
  • corridor width are the corridor width
  • Fig. 12 shows a further tubular inventive ventilation device 10 in which the inactive surface areas O I of the ventilation element 100 are formed in a continuous strip in two directions and form intersecting corridors.
  • the ventilation device hangs horizontally under a ceiling.
  • Such a design is advantageous in the case of larger pipe diameters, for example from 300 mm and / or large temperature differences, between supply air and room air (for example .gtoreq.3 K), in particular given a corresponding under temperature of the supply air and greater cooling capacity.
  • the slot grid are covered or not executed in the lower part of the tube, which results in a more favorable distribution of the supply air, in particular a supply air with low temperature compared to the room air.
  • such tubes can also be formed as vertical columns, wherein the inactive to the tube axis parallelel surface, depending on the site eg. In several narrower strips distributed over the circumference can be arranged.
  • the slots can also be inclined with respect to the surface of the ventilation element either vertically or, as often unavoidable for manufacturing reasons, slightly in (ie angle slightly less than 90 degrees) or counter (ie angle slightly greater than 90 degrees) the axially directed Hauptstömungsoplasty (for example, in a range of 0 to 10 degrees, ie, for example, 80 to 110 degrees from the surface).
  • the orientation of the slit turret generally plays a lesser role in box-shaped venting devices, especially if they additionally have a flow-in box 23, which already diverts the airflow from a pipe axis-parallel alignment in the direction of the inner surface of the venting element.
  • a flow-in box 23 which already diverts the airflow from a pipe axis-parallel alignment in the direction of the inner surface of the venting element.
  • an undesired flat or even surface-parallel exit of the supply air into the space may occur Detachment of the air flow difficult and the ventilation performance deteriorates markedly. In particular, this causes a smaller throw and lower induction.
  • the characteristic dimension x I in this case the width b I of the stripes of the inactive surface O I, can be selected in a range from 500 to 1000 mm, while the width of the active surface area O A is selected in a range of 8 to 350 mm.
  • the active still, for example, as detailed above, be interrupted by inactive areas. Table 2 Vers.Nr. Suspension height tube axis mm Abgekl. Area O I m 2 Additionally dil.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Building Environments (AREA)
  • Air-Flow Control Members (AREA)
  • Duct Arrangements (AREA)
EP18184206.3A 2017-07-28 2018-07-18 Dispositif d'aération Active EP3434998B8 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH00982/17A CH714025A1 (de) 2017-07-28 2017-07-28 Lüftungsvorrichtung.

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EP3434998A1 true EP3434998A1 (fr) 2019-01-30
EP3434998C0 EP3434998C0 (fr) 2023-06-07
EP3434998B1 EP3434998B1 (fr) 2023-06-07
EP3434998B8 EP3434998B8 (fr) 2023-08-09

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8710449U1 (fr) * 1987-07-30 1987-10-15 Schako Ferdinand Schad Kg Zweigniederlassung Kolbingen, 7201 Kolbingen, De
DE4244409A1 (en) * 1992-12-29 1993-06-03 Ltg Lufttechnische Gmbh Air conditioning source intake and heat exchanger - comprises housing with by pass between exchanger and outlet housing
EP0886747B1 (fr) * 1996-03-11 2003-05-14 LIND, Leif Ingemar Dispositif terminal d'apport d'air en forme de caisson ou d'ecran
CH702748A2 (de) * 2010-02-19 2011-08-31 Kst Ag Lüftungsvorrichtung sowie Lüftungseinrichtung mit solchen Lüftungsvorrichtungen.
DE202012101832U1 (de) * 2012-05-18 2012-06-15 Siegle + Epple Gmbh & Co. Kg Luft- Und Klimatechnik Luftdurchlassvorrichtung zur Belüftung
DE202015105168U1 (de) * 2015-09-30 2015-11-23 Ltg Aktiengesellschaft Luftauslass

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK12792D0 (da) * 1992-02-03 1992-02-03 Ke Safematic As Ventilationssystem

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8710449U1 (fr) * 1987-07-30 1987-10-15 Schako Ferdinand Schad Kg Zweigniederlassung Kolbingen, 7201 Kolbingen, De
DE4244409A1 (en) * 1992-12-29 1993-06-03 Ltg Lufttechnische Gmbh Air conditioning source intake and heat exchanger - comprises housing with by pass between exchanger and outlet housing
EP0886747B1 (fr) * 1996-03-11 2003-05-14 LIND, Leif Ingemar Dispositif terminal d'apport d'air en forme de caisson ou d'ecran
CH702748A2 (de) * 2010-02-19 2011-08-31 Kst Ag Lüftungsvorrichtung sowie Lüftungseinrichtung mit solchen Lüftungsvorrichtungen.
DE202012101832U1 (de) * 2012-05-18 2012-06-15 Siegle + Epple Gmbh & Co. Kg Luft- Und Klimatechnik Luftdurchlassvorrichtung zur Belüftung
DE202015105168U1 (de) * 2015-09-30 2015-11-23 Ltg Aktiengesellschaft Luftauslass

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EP3434998C0 (fr) 2023-06-07
CH714025A1 (de) 2019-01-31
EP3434998B8 (fr) 2023-08-09
EP3434998B1 (fr) 2023-06-07

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