EP3596403A1

EP3596403A1 - Displaced air outlet

Info

Publication number: EP3596403A1
Application number: EP18715493.5A
Authority: EP
Inventors: Andre Göbel; Dietmar Rossbruch; Eckehard Fiedler
Original assignee: Krantz GmbH
Current assignee: Krantz GmbH
Priority date: 2017-03-13
Filing date: 2018-03-13
Publication date: 2020-01-22
Anticipated expiration: 2038-03-13
Also published as: JP2020510186A; CN110621941A; CN110621941B; WO2018167037A1; JP6961731B2; DE102017105238A1; EP3596403B1; EP3596403C0

Abstract

The invention relates to a displaced air outlet (1) comprising: an elongate tubular body (2) that has a longitudinal axis (13) and a casing (5) with holes, wherein an interior (4) of the tubular body (2) enclosed by the casing (5) forms a first air distribution space (6); an air inlet cross section (8) of the tubular body (2) leading into the interior (4) and arranged at a first end (7) of the tubular body (2); an air outlet cross section formed by the holes in the casing (5); a flow transfer cross section (23) leading from the interior (4) of the tubular body (2), forming a fluidic connection to a second air distribution space (11), and arranged at a second end (9) of the tubular body (2) disposed opposite the first end (7); a nozzle body (3) connected to the second end (9) of the tubular body (2), the interior of said nozzle body forming the second air distribution space (11) and being provided with at least one air outlet cross section (15) in the form of a nozzle (14); and a closure element (21), which is arranged in such a way that it closes the flow transfer cross section (23) in a closed position and releases the flow transfer cross section (23) in an open position. In order to achieve a high depth of infiltration of the jets of supply air exiting from the nozzles (14) and a good induction of the supply air exiting from the holes in the casing (5) by the nozzle jets, according to the invention the ratio of the area of the flow transfer cross section (23) to the area of the cross section of the first air distribution space (6) is at least 0.7, preferably at least 0.75, more preferably at least 0.8.

Description

Verdrängungsluftauslass

Description Introduction

The invention relates to a displacement air outlet with

an elongated tubular body having a longitudinal axis and having a jacket with perforations, an inner space enclosed by the jacket forming a first air distribution space therewith,

a leading into the interior air inlet cross-section of the tubular body, which is arranged at a first end of the tubular body,

a first air outlet cross-section formed by the perforations of the jacket,

a cross-flow cross-section leading from the interior of the tubular body, which forms a flow connection to a second air-distributing space and is arranged at a second end of the tubular body lying opposite the first end,

- A subsequent to the second end of the tubular body nozzle body whose interior forms the second air distribution space and which is provided with air outlet cross-sections in the form of a respective nozzle and

- A closure element which is arranged such that it substantially closes the overflow cross section between the first air distribution space and the second air distribution space in a closed position and the overflow cross section opens in an open position.

State of the art

Displacement air outlets are often used in industrial halls, which are characterized by a comparatively large ceiling height. When heating, heated supply air

typically approximately vertically downwards, ie in the direction of the hall floor,

ejected, so that the room air is heated up close to the room floor. In cooling, cooled supply air is introduced approximately horizontally into the room, so that the one

Undertemperatured supply air "trickles" down towards the room floor, thereby avoiding drafts in a common area of persons can. An essential criterion for pure displacement air outlets is the

Introduction of air with low momentum, so that the lowest possible mixing of the room air over the height takes place. The supply air to displace the usually warmer and typically contaminated with pollutants room air from bottom to top, without mixing with her, in order to achieve the best possible air quality in the residence area of the persons.

From EP 1 318 360 A2 an air outlet of the type described above is known, which consists of an outer jacket and a coaxially arranged inner jacket

is composed. Both the circular cylindrical outer jacket and the conical inner jacket are provided with recesses or windows. The known air outlet is at its the bottom of the room to be ventilated facing bottom

Jet nozzles equipped to direct heated in the heating supply air with high penetration depth in the room.

The known displacement air outlet is subject to the problem that the comfort in the occupied area of the people on hot summer days when the outside temperature, e.g. above 25 ° C or 30 ° C, can only be achieved by an energy-consuming cooling of the supply air, typically with the help of chillers. Without such supply air cooling, excessively high temperatures in the occupied area of the persons can not be avoided. The prior art also includes the generic DE 10 2014 107 957 A1, which also describes a displacement air outlet. In the outer shell, a core tube is arranged in a central region, whose longitudinal axis coincides with the longitudinal axis of the tubular body. The core tube is formed closed, so has no breakthroughs, as they are present in the inner shell of the outlet according to EP 1 318 360 A2. In the core tube of DE 10 2014 107 957 A1 there is a

Rotary flap, which closes the core tube in its closed position and thus can prevent an air flow through the same. On the other hand, a cross-section of the core tube is released in an open position of the rotary flap, so that a partial flow of the supply air can flow through the core tube. In addition, located below the region of the outlet with the perforated shell whose interior forms the first air distribution space, a Überströmquerschnitt to a second air distribution space, which is located in a arranged on the bottom of the outlet nozzle body.

When the rotary valve is closed in the core tube, the outlet known from DE 10 2014 107 957 A1 is characterized by an approximately vertically downward discharge which is particularly suitable for introducing warm supply air into the occupied area in the so-called heating case. The closure element obstructs the overflow cross section to the nozzle body in this operating state. If the rotary flap is opened in the core tube and the closure element is retained in its closed position, however, a deflection of the air flow in the region of the closure element results in an approximately horizontal, radially directed outflow. This flow pattern is particularly suitable for the supply of supply air with low temperature, ie in the so-called cooling case, in which the supply air is to descend slowly from the horizontal flow direction down to the residence area to avoid drafts.

If, in the case of cooling, the supply air is to be introduced into the room with an increased impulse (isch-source ventilation), the rotary valve in the core tube can also be used

Opened closure element and thus the overflow are released to the nozzle body. However, it has been found that at a given pressure in the air intake system, the achievable outflow velocities from the nozzles are too low to achieve an increased air movement in the occupied zone, as they are for a

Comfort increase would be desirable without recourse to a significant low temperature of the supply air.

The prior art also includes the outlet of the type "BOC", a "source outlet with BOOSTER" from Swegon. The known outlet is intended for rooms with high ceiling heights, such as industrial halls, supermarkets, sports halls, etc. and has a cylindrical outer shell with an octagonal cross section. A distributor plate, which forms an inner jacket, is equipped with a flexible distribution system for the room air. Immediately below the inlet cross-section into the outlet is a nozzle space which also has an octagonal outer shape and is provided with a plurality of aerodynamic nozzles. The nozzle chamber and the second air distribution space underneath are separated from one another by means of a flap which can be adjusted manually or by means of a drive. In the heating case, the warm supply air flows through the nozzles in the upper part of the outlet and has a strong vertical downward flow direction to achieve a corresponding penetration depth. In the cooling case, the supply air leaves the known outlet not through the nozzles, but through the perforations in the arranged below the nozzle chamber outlet part, in which case the flap is open in the overflow.

Furthermore, from the article by Dr. med. Hans Werner Roth "Energy Saving through Mechanical Ventilation in Industrial Halls", published in the journal HLH Ventilation / Air Conditioning, Heating / Sanitary, Building Services, Vol. 67 (2016), No. 10-October, a combined air passage of the type ILQsf LTG known. Like the Swegon outlet discussed above, the ILQsf outlet has a nozzle box in its upper section and a tubular body with perforations on its jacket in its lower section. The peculiarity of the ILQsf lies in its axially displaceable in the lower part of the outlet plate, which automatically adjusted via a counterweight at a constant internal pressure or can be electronically controlled using a driven with external energy drive. In this way, with increasing loads, an increase in the volume flow over the source air-like lower part of the outlet up to a maximum exit velocity is possible. The pressure loss in the air outlet and the radial flow impulse should remain constant.

Furthermore, DE 40 37 287 A1 describes a source air passage for installation on a floor with a perforated shell, which serves as an air outlet surface. At the

Floor opposite end of the outlet is a spigot through which the air flows in vertical direction down. The known outlet is divided into a plurality of sections whose boundaries are each defined by a diaphragm ring. From top to bottom reduces the free central cross section of the aperture rings. In the respective sections, a division of the air volume flow takes place in such a way that a partial volume flow in the radial direction through the jacket flows outwards, whereas another partial flow enters the next section between the following diaphragm rings and is again disassembled there. In this way, a uniform distribution of the emerging supply air over the height of the outlet should be achieved. Due to the floor installation of the known outlet is a

Outflow at the bottom is not possible with a downward flow component. A use of the outlet with a distance between the floor and the bottom of the outlet is not provided and due to the source air principle also not useful.

Finally, EP 0 541 977 A2 discloses an outlet for producing a low-turbulence displacement flow, which has a perforated outer casing and a likewise perforated inner casing. A baffle body forms in a first position both a lower closure of the inner shell, in which the air flows through an inlet cross-section arranged at the top, and a closure of a lower, second

Air distribution space, which extends over the entire cross section of the outer shell. In a second, lowered position of the baffle body of the inner shell is opened at the bottom and at the same time an annular, radially further outward Überströmquerschnitt of an upper, first air distribution space to the second, lower air distribution space created. In this way, for the heating case, an outflow with a larger vertical

Flow component created and thus the penetration depth of the exhaust air are increased in the room. Due to the obstruction of a central area by the baffle body, the lower, second air distribution space is only weakly supplied with supply air, in particular in its central area.

task

The invention is therefore based on the object to provide a displacement air outlet, with the comfort in the occupied area at times with high

Outdoor temperature and thus also correspondingly high temperature in the occupied area of people, can be increased without lowering the supply air temperature more.

solution

Based on an outlet of the type described above, the underlying object is achieved in that the ratio of the surface of the overflow to the surface of the cross section of the air distribution space at least 0.6, preferably at least 0.7, more preferably at least 0.75, even further preferably at least 0.8.

The displacement air outlet according to the invention makes use of the knowledge that the momentum of the supply air, which is present in the region of the inlet cross section in the first air distribution space, is maintained as low as possible through the overflow cross section and then in the nozzle space and also at the exit from the nozzles themselves is available. It has been found that only with a sufficiently large pulse in the nozzle space, i. Also, sufficiently large exit velocity of the supply air from the nozzle outlet cross-sections, the required, measured in the radial direction penetration depth of the supply air can be achieved in the room to be ventilated.

On the other hand, both in the case of the outlet according to DE 10 2014 107 957 A1 and in the outlet according to EP 1 318 360 A2, the overflow cross section is significantly smaller than the minimum value proposed according to the invention, so that the momentum of the supply air emerging from the nozzles increases is low to achieve a satisfactory penetration depth. The large penetration depth of the supply air obtained according to the invention is therefore at high temperatures in the occupied area, i. especially on hot summer days, very important because the heat emission of humans occurs at such ambient temperatures increasingly by welding and evaporation. In this context - unlike at lower temperatures in the occupied area, for example during the

Winter half year - an increased air movement as pleasant, as they the Evaporation and therefore cooling promotes. This possibility of increasing comfort is described, for example, in DIN EN ISO 7730: 2005, Annex G. Under energetic

In view of such a way of increasing the comfort is particularly attractive because it can be dispensed with the supply of supply air with a large under temperature, which would only be possible via an active cooling by means of refrigerators. Such a waiver affects both the investment and ongoing operating costs of one

Ventilation very positive.

Under the feature that the closure element in a closed position the

Overflow cross-section "essentially" closes, is intended in the context of the present

Be understood application that the closure element may optionally not be transferred to a full closed position to keep the pressure loss in all operating facilities of the air outlet as constant as possible, whereby the control of the ventilation system is simplified. A free residual cross-section of the overflow cross-section in the closed state of the closure member can, for example, always be free

Cross-section (breakthrough) in the closure member (such as flap) itself be realized or in that the closure member on its adjustment before reaching the full closed position to a stop o.ä. strikes.

For the purposes of the present application, the "cross-section of the air distribution space" is to be understood as meaning the cross-sectional area of the cross-sectional area measured perpendicular to the longitudinal axis of the tubular body

Air distribution space are understood. Preferably, this cross-sectional area should be constant over the entire length of the tubular body or air distribution space. In this case, there is a cylindrical Luftverteilraum whose cross-section for the sake of simplicity a

Circle shape but also the shape of a polygon, in particular a hexagon or

Oktagons, can own. If the cross-sectional area of the air distribution space is above its height, i. viewed in the direction of the longitudinal axis, not constant, it is assumed from the viewed over the height average cross-sectional area. In determining the mean cross-sectional area, a cylinder is determined which has the same volume as the non-cylindrical air distribution space and then uses its cross-sectional area.

A high impulse of the supply air at the exit from the nozzles is in addition to the

Throwing distance also in so far of great importance, as the nozzle flow that part of the supply air, which also at (partially) open Überströmquerschnitt from the first air distribution space, ie the perforations of the shell exits, can be induced and the direction of the jet follows. If the impulse of the nozzle jets is too low, as is the typical problem with the known outlets according to DE 10 2014 107 957 A1 and according to US Pat EP 1 318 360 A2, the induction of the supply air quantity emerging from the jacket above the nozzles can only be insufficiently successful.

The functionality of the outlet according to the invention can be further improved by the fact that the area fraction of the perforations in the shell on the entire surface of the shell, i. including the area of the perforations (apertures) is less than 18%, preferably less than 15%, more preferably less than 13%. This unusually small area fraction of the perforations or openings for a perforated jacket causes a correspondingly large flow resistance of the jacket and thus - for a given total pressure of the supply air flow - a fraction of the supply air which is limited when the overflow cross section is open and which emerges through the perforated jacket. In particular, the low free area fraction in the jacket prevents too large a proportion of the supply air from escaping from the jacket and does not even pass through the overflow cross-section into the nozzle chamber. The comparatively small surface area of the perforations thus supports a sufficiently large impulse of the supply air at the nozzle outlet. The invention further ausgestaltend is provided that a central region of the first

Air distribution space, which viewed in the direction of the longitudinal axis of the first Luftverteilraums, from the air inlet cross section of the tubular body to the overflow and, viewed in the radial direction, from the longitudinal axis of the tubular body to a radius of 50% of the radius of the shell extends, free of internals of any kind. In this way, in the central area of the first one as defined above

Air distribution space ensures a low-loss flow as far as the overflow cross-section, so that even in the nozzle chamber, a sufficiently large supply air pulse is present. In particular, the air outlets according to DE 10 2014 107 957 A1 and EP 1 318 360 A2 have with the core tube provided with a flap or with the inner

Taper body strongly resistive internals, leading to a pressure and

Lead impulse loss before reaching the overflow or nozzle space.

A further development of the invention consists in that at least three diaphragm rings spaced from one another in each case in the direction of the longitudinal axis of the casing are present on an inner surface of the casing. These diaphragm rings lead to a certain congestion of the supply air flow in the first air distribution space, triggered by a

Strömungseinschnürung and subsequent beam expansion, which in turn favors the radial outflow of the supply air from the perforations of the shell in a section, viewed in the flow direction behind the respective aperture ring. In order to prevent the diaphragm rings from losing too much pressure, in particular when the overflow cross-section to the nozzle body is open, it is proposed that a ratio of an inner diameter should be at least one

Aperture ring, preferably all aperture rings, to an outer diameter of the respective aperture ring between 0.65 and 0.90, preferably between 0.70 and 0.90. It is therefore comparatively very "narrow" aperture rings, which generate less a back pressure than a flow constriction and subsequent

To cause flow expansion to promote the radial outflow of a portion of the supply air through the perforations in the jacket. An embodiment of the invention also consists in the fact that the nozzles have a longitudinal axis extending in the main flow direction of the incoming air flowing through them, which with the longitudinal axis of the tubular body forms an angle between 70 ° and 50 °, preferably between 65 ° and 55 °. The nozzles can be pivoted in the

Stored or rigidly mounted therein or integrated nozzle body, whereby the

Production costs are reduced. As particularly advantageous in this

Related point exposed the formation of an angle of 60 ° between the nozzle longitudinal axis and tubular body longitudinal axis, wherein - as in all the above

Angular data also - the flow from the nozzles has a directed to the bottom of the room to be ventilated flow component and is not directed towards the ceiling.

To a manufacturing technology favorable solution to achieve the downward

To achieve nozzle flow, the nozzle body may be truncated pyramidal, and have a hexagonal or octagonal cross-section. The nozzles may preferably be arranged centrally in respective side surfaces of the truncated pyramid. Preferably, each side surface of the truncated pyramid is equipped with a nozzle which may be fixed or adjustable. Preferably, the truncated pyramid should taper in the direction of flow of the incoming air, i. the truncated pyramid stands at suspension of the

inventive air outlet at a room thickness "on the head.

A development of the outlet according to the invention still consists in that the closure element is a butterfly flap or an iris diaphragm or a toothed disc diaphragm or a rotary valve. Particularly preferred in this context is a butterfly flap, since this requires little manufacturing effort, in its maximum

Opening position in which the two blade halves lie as flat as possible against each other, have a low flow resistance, and moreover in intermediate positions between the closed position and the maximum open position a symmetrical Outflow causes behind the butterfly valve, wherein the symmetry with respect to a longitudinal center plane which passes through the longitudinal axis of the tubular body and the axis of rotation of the butterfly valve.

In addition, according to an embodiment of the invention, it is also provided that a height of the nozzle body measured in the direction of the longitudinal axis of the tubular body is less than 50%, preferably less than 40%, of the diameter of the jacket.

Finally, it is provided that the outlet cross sections of the nozzles are arranged on a circle which has a diameter which is preferably at least 20%, preferably at least 30% larger than the diameter of the jacket. In this way, on the one hand, the penetration depth of the nozzle jets is increased, the diversion of the supply air in the nozzle body is less "sharp", i.e. less lossy, and an improved "induction" of the emerging from the jacket perforations Zuluftanteils by the nozzle jets allows.

EXEMPLARY EMBODIMENT The invention is described below with reference to an exemplary embodiment

Displacement air outlet with nozzle body, which is shown in the figures, explained in more detail. It shows:

Fig. V. An external perspective view of the displacement air outlet

"Diagonally from below",

FIG. 2: a side view of the displacement air outlet according to FIG. 1 in FIG

Partial section,

2a shows a vertical section through the displacement air outlet according to Figure 1 in the region of the closure element,

3 shows a horizontal section through the displacement air outlet according to FIG

1 with a closure element in an open position,

FIG. 4: as in FIG. 3, but in a closed position of the closure element, FIG.

Fig. 5: a schematic representation of the flow path when opened

Closure element and activated nozzles and

FIG. 6: as in FIG. 5, but with the closure element closed and non-active nozzles. 1 to 4 show a displacement air outlet 1 with a tubular body 2 and a nozzle body 3. The tubular body 2 has a first interior space 4 (see in particular FIG. 2) which forms a first air distribution space 6 of the displacement air outlet 1. The jacket 5 is provided with a plurality of perforations, each having a circular shape and are arranged according to a specific distribution pattern in groups in the jacket 5. The perforations in their entirety form a first air outlet cross section of the

Displacement air outlet 1, however, are not shown in the drawing figures for the sake of simplicity. The area ratio of the perforations on the total area of the shell 5 (in the section between an uppermost aperture ring 26 and the beginning of a

Transition region 20, in particular a closure element 21) is 12%, and is thus significantly lower than in conventional displacement air outlets.

At a first, in Figure 2 upper, end of the tubular body 2 is a

Air inlet cross-section 8, can be introduced via the tempered from a known from the prior art and not shown supply air supply air in the first air distribution chamber 6. The supply air can be controlled in terms of temperature, humidity and / or the volume flow introduced into the displacement air outlet 1, among others.

At a second, in Figure 1 lower end 9 of the tubular body 2, which is opposite the first end 7 and directed towards a floor, not shown, follows in the flow direction of the nozzle body 3 on the tubular body 2, wherein an interior 10 of the nozzle body 3 a second air distribution chamber 11 forms. Between the nozzle body 3 and the tubular body 2 is a transition region 20, which will be discussed later.

The nozzle body 3 has an octagonal cross section with eight wall sections 12, wherein the wall sections 12 each extend obliquely to a longitudinal axis 13 of the tubular body (FIG. 2). Thus, the nozzle body 3 has the shape of an octagonal truncated pyramid extending in the direction from a first end 34 of the nozzle body 3 to a second end 35 of the nozzle body 3, i.e., in the direction of the nozzle body 3. towards the floor of the room to be ventilated, rejuvenated. A height H of the nozzle body 3 is about one third of the

Inner diameter D3 of the tubular body 2. In each of the eight wall sections 12 each have a nozzle 14 is arranged, each defining an air outlet cross-section 15 from the second air distribution chamber 11. The air outlet cross sections 15 of the nozzles 14 rest on a circle 16 whose diameter is 70% greater than the inner diameter D3 of the tubular body 2. On a side facing away from the tubular body 2 side 17 of the nozzle body 3 has a closed bottom plate 18, which closes the second air distribution chamber 11 to an environment. The wall portions 12 close to the bottom plate 18 at an angle α of 60 °. On a tubular body 2 facing side 19 is in the transition region 20 between the tubular body 2 and the nozzle body 3, a closure element 21 is arranged in the form of a butterfly valve, the opening and closing position, each in a plan view, shown in Figures 3 and 4 is. The butterfly flap consists of two blade halves 22, each formed approximately semicircular and pivotable about a common axis AK. The pivoting movement is such that the blade halves 22 are coupled via a gear, which causes a rotation of the blade halves 22 in the opposite direction. In Figure 3, an open position of the closure member 21 is shown in which the blade halves 22 are at a very acute angle to each other, the respective rectilinear leading edges are arranged very close to each other and thus virtually form the common leading edge of a counter to the flow direction oriented wedge Flanks are formed by the two blade halves 22. The remaining angle between the blade halves in the maximum open position is determined by the

Gearbox design due to technical reasons; It would be optimal if the included angle would be 0 ° and the closure element 21 would occupy the smallest possible proportion of the surface of a Übertrömquerschnitts 23 between the first air distribution space 6 and the second air distribution space 11 in this way. The (maximum) overflow cross section 23 is about 80% of the cross-sectional area of the first air distribution space. In any case, the butterfly flap divides the overflow cross section 23 with its axis AK into two partial cross sections. The adjustment of the closure element 21 takes place by means of an actuating element 24 in the form of a shaft on which on the outside of the displacement air outlet. 1

for example, an unillustrated lever, Bowden cable or a e.g. electric drive device can be arranged.

It can be seen from FIG. 2a that the blade halves 22 extend in the second air distribution space 11 in the nozzle body 3 and the axis AK of the butterfly flap is arranged in the plane of the overflow cross section 23.

As can be seen in particular from FIG. 4, the overflow cross section 23 in FIG

shown closed position of the closure element 21 completely closed. If desired, however, a permanently open (small) residual cross-section can be realized in order to obtain a certain outflow through the nozzle body 3 in all operating states. As can be seen from FIG. 2, four diaphragm rings 26 are arranged on the inner side 25 of the tubular body 2. The upper aperture ring 26 is located at a distance A1 of 250 mm to the upper end 7 of the tubular body 2, the next lower aperture ring 26 at a distance A2 of 140 mm to the overlying diaphragm ring 26, the third diaphragm ring 26 at a distance A3 of 180 mm to the second and the fourth

Aperture ring 26 at a distance A4 of 180 mm to the third party. The total length L of the tubular body is 1040 mm, with a length LÜ of 120 mm of

Transition region 20 and a length LA of 80 mm of a connecting piece A is included. Subsequent to the connecting piece A there is a closed region B, which extends up to the uppermost glare ring 26, in which the shell has no perforations and which extends over a length LG of 160 mm. In the unperforated region B, therefore, no supply air can pass radially outwards through the jacket 5; on the contrary, this region of flow calming after the inlet-side end 7 serves.

With reference to Figures 5 and 6, the functionality of the displacement air outlet 1 is explained in more detail below:

In Figure 5, the flow is illustrated as it results when the closure member 21 is in the open position shown in Figure 3 and thus the

Overflow cross section 23 between the first air distribution chamber 6 and the second

Air distribution chamber 11 is open. By a central region Z in the tubular body, which is shown by a dashed line LZ in Figure 2, the supply air (arrow 28) flows almost lossless through the tubular body 2 and the overflow cross section 23 in the second air distribution chamber 11 within the nozzle body 3. Accordingly at the outlet of the nozzles 1, a large pulse available to a large depth of penetration of the

Jet nozzles ejecting air jets (arrow 27) leads. These air jets are inclined at an angle of 30 ° to the horizontal (in a vertical arrangement of the displacement air outlet 1 in a room) and thus move in the direction of the room floor. The rays emerging from the nozzles 14 in this case induce a part of the supply air, which exit via the perforations in the jacket 5 of the tubular body 2. The exit of this portion of the supply air (arrows 29 to 31) from the jacket 5 has a radial component, but is due to the induction effect of the jet directed at an angle of approximately 45 ° to the horizontal downwards. In this operating mode there is a mixed-displacement ventilation, wherein in a particularly advantageous manner substantially only the supply air from the jets, i. Primary air, and not or only to a very limited extent, also possibly

contaminated room air is induced. The air quality in the living area near the ground can thereby be noticeably improved. The operating state shown in FIG. 5 can serve both to quickly heat a hall in the winter, for example after cooling over the weekend with supply air at an excess temperature compared to the current room temperature, and to serve in summer in the living area in the vicinity of the room Floor of more than 25 ° C with a supply air temperature below the room temperature to achieve increased air movement in the living area in order to increase the comfort in this way. In the last described cooling case, the supply air can be cooled by free cooling or adiabatically and thus provided in an energy-efficient and relatively inexpensive manner. In the situation shown in Figure 6, in which the closure element 21 in its

Closed position, the displacement air outlet 1 acts as a pure source air outlet. The nozzles 14 are in this operating condition out of function and the supply air is discharged solely through the holes in the shell 5 of the tubular body 2. By the deflection of the supply air flow at the acting as a baffle butterfly closed flap

(Closing element 21), the supply air leaves the jacket 5 in approximately horizontal or slightly upward direction. There is thus a deflection of the air by 90 ° and more. In this way, there is a displacement ventilation, which is perceived as particularly comfortable, in which the room air velocity is very low. In this case, the supply air may well have a noticeable low temperature compared to the room air, since the cooler air is distributed only slowly and over a large area from a greater height in the direction of the

ground level living area trickles down. The arrangement of the displacement air outlet 1 is carried out either free in the room or on walls or columns at a height of usually about 3 meters above the hall floor.

In addition to the use of the nozzle function (FIG. 5) for classic heating or for increased cooling in summer, the connection of the nozzle function can also be used to flush the residence area in the short term. This is particularly indicated when a higher pollutant content temporarily arises in production halls, as can occur, for example, after opening an industrial furnace. In this case, the connection of the nozzle function (Figure 5) for a short time, for example, a few minutes, whereas afterwards again to the conventional displacement ventilation without

Purge function and without application of the nozzles 14 (Figure 6) is returned.

In addition to the two states shown in Figures 5 and 6, in which the

Closing element 21 is either fully open or fully closed, all conceivable intermediate positions of the closure element 21 are possible. As a result, the height of the air velocity in the residence area is virtually infinitely and completely according to the individual needs of the persons present. In this way, a stepless transition between pure displacement ventilation and mixed displacement ventilation takes place.

LIST OF REFERENCE NUMBERS

A connecting piece AK axis

A1 to A4 distance

B area

D1 inner diameter

D2 outside diameter

D3 inner diameter

D4 diameter

H height

L length

LA length

LG length

LÜ length

LZ length

Z central area

1 displacement air outlet

2 tubular bodies

3 nozzle body

4 interior

5 coat

6 first air distribution room first end

Air inlet cross section second end

inner space

second air distribution space

wall section

longitudinal axis

jet

Air outlet cross section

circle

page

baseplate

page

Transition area

closure element

leaf half

overflow cross

jig

inside

aperture ring

arrows

first end second end

Claims

claims

1. Displacement air outlet (1) with

- An elongated tube body (2) having a longitudinal axis (13), which has a jacket (5) with perforations, wherein one of the jacket (5) enclosed interior (4) of the tubular body (2) has a first

Air distribution space (6) forms,

- A leading into the interior (4) air inlet cross section (8) of the

Tubular body (2) which is arranged at a first end (7) of the tubular body (2),

- One of the perforations of the shell (5) formed

Air outlet cross section,

- One from the interior (4) of the tubular body (2) leading

Überströmquerschnitt (23) which forms a flow connection to a second air distribution space (11) and at a first end (7) opposite the second end (9) of the tubular body (2) is arranged,

a nozzle body (3) adjoining the second end (9) of the tubular body (2), the interior of which forms the second air distribution space (11) and which is provided with at least one air outlet cross section (15) in the form of a nozzle (14),

- A closure element (21) which is arranged such that it closes the Überströmquerschnitt (23) in a closed position and the overflow cross-section (23) releases in an open position, characterized in that

- The ratio of the area of Überströmquerschnitts (23) to the surface of the cross section of the first Luftverteilraums (6) is at least 0.6, preferably at least 0.7, more preferably at least 0.75, even more preferably at least 0.8.

2. displacement air outlet (1) according to claim 1, characterized in that the surface portion of the perforations in the jacket (5) on the surface of the jacket (5) less than 18%, preferably less than 15%, more preferably less than 13%.

3. displacement air outlet (1) according to claim 1 or 2, characterized in that a central region (Z) of the first Luftverteilraums (6), in the direction of the longitudinal axis (13) of the first Luftverteilraums (6) viewed from the

Air inlet cross-section (8) up to the overflow cross-section (23) and viewed in the radial direction from the longitudinal axis (13) to a radius of at least 50%, preferably at least 60%, more preferably at least 70% of the radius of the shell (5) extends , is free of fittings of any kind.

4. displacement air outlet (1) according to one of claims 1 to 3, characterized

characterized in that at least three each in the direction of the longitudinal axis (13) of the jacket (5) spaced apart aperture rings (26) are arranged on an inner surface of the jacket (5).

5. displacement air outlet (1) according to one of claims 1 to 4, characterized

in that a ratio of an inner diameter (D1) of an aperture ring (26) to an outer diameter (D2) of the same aperture ring is between 0.65 and 0.90, preferably between 0.70 and 0.90.

6. displacement air outlet (1) according to one of claims 1 to 5, characterized

in that the nozzles (14) have a longitudinal axis running in the main flow direction of the supply air flowing through them, which encloses an angle between 50 ° and 70 °, preferably between 55 ° and 65 °, with the longitudinal axis (13) of the tubular body (2).

7. displacement air outlet (1) according to one of claims 1 to 6, characterized

characterized in that the nozzle body (3) is pyramid-shaped and has a hexagonal or octagonal cross-section, the nozzles (14) are preferably arranged centrally in respective side surfaces of the truncated pyramid and / or wherein the truncated pyramid tapers in the flow direction of the supply air.

8. displacement air outlet (1) according to one of claims 1 to 7, characterized

in that the closure element (21) is a butterfly flap or an iris diaphragm or a toothed disc diaphragm or a rotary flap.

9. displacement air outlet (1) according to one of claims 1 to 8, characterized

in that a direction in the direction of the longitudinal axis (13) of the tubular body (2) measured height (H) of the nozzle body (3) is less than 50%, preferably less than 40%, of the diameter (D3) of the shell (5) of the tubular body (2).

Displacement air outlet (1) according to one of claims 1 to 9, characterized in that outlet cross sections of the nozzles (14) are arranged on a circle (16) whose diameter (D4) at least 20%, preferably at least 30%, greater than the outer diameter (D2) of the shell (5) of the tubular body (2).