EP1496318B1 - Air outlet for ceilings - Google Patents

Abstract

A ceiling mounted ventilator for an air conditioning system has an outer ring shaped duct (2) with fixed vanes (5) to spread the air flow laterally over the room. A central duct (4), e.g. for warm air, is fitted with control flaps (10) tilting about axes transverse to the flow direction. The flaps can be set to operate automatically via temperature control elements. Warm air is ducted directly downwards, for maximum comfort, while cool air is spread over the top of the room without detected draughts.

Description

The invention relates to a Deckenluftauslass with an outer tube, a concentrically arranged here core tube, swirl vanes between the core tube and the outer tube, by means of which a swirling air flow is guided such that it emerges substantially perpendicular to a flow direction of the Deckenluftauslasses from an annular swirl diffuser, and with a arranged in the core tube blocking element, by means of which a guided through the core tube to a core outlet core air flow can be blocked, wherein the blocking element has at least one flap which is foldable about a perpendicular to the flow direction folding axis by a folding angle.

Such ceiling air outlets allow - to meet today's comfort requirements and to achieve an energetically effective air conditioning of the room - the change in the outflow direction of the supply air depending on their over- or under-temperature compared to the room air. To avoid drafts, cooled supply air is blown horizontally, heated supply air for rapid heating but vertically downwards.

Compared to the well-known swirl air outlets, as for example in the DE 36 22 146 are disclosed, such ceiling air outlets on an additional concentrically arranged in the outer tube core tube. The supply air flow is in the Deckenluftauslass on the one hand in a swirl air flow - between the outer tube and core tube in a known manner via swirl blades and substantially radially (perpendicular to the flow direction of the Deckenluftauslasses) blown out - and divided from the core tube axially (in the flow direction) blown out core air flow , The discharge direction of the recirculated supply air flow is adjusted by controlling the swirl and core air flows.

When the core tube is locked, the supply air flows completely through the swirl vanes, while the ceiling air outlet acts like a classic swirl air outlet. With increasing opening of the core tube, the core air flow increases and also induces an axial component of the incoming air flowing out of the twist outlet. When the core tube is completely open, the supply air flows through the core outlet for the most part. The swirl vanes additionally act as throttles in the swirling air flow, so that the supply air flows out essentially in the direction of flow through the ceiling air outlet.

For example, in the DE 80 03 910 U1 Such a ceiling air outlet is disclosed, which has a valve plate which can be displaced in the direction of flow above the core tube. Depending on its position, the valve disc blocks more or less the flow through the core tube. The DE 41 39 099 A1 discloses a Deckenluftauslass with a similar principle, in which case a displaceable in the flow direction core tube is more or less locked depending on the position of a fixed baffle plate.

The Ausströmcharakteristik such ceiling air outlets can - as in the DE 196 51 480 A1 disclosed - be adjusted by means of an adjustment. The automatic adjusting device proposed there, however, can apply only comparatively small forces for the adjustment of a blocking element-without the supply of secondary energy. The adjustment of the valve plate or the core tube from the known adjustable Deckenluftauslässen is not possible with these limited power reserves.

According to the DE 37 36 448 A1 An air swirl outlet is known in whose air duct is a centrally arranged cylindrical inner tube, wherein in the air duct an outer ring of outer swirl blades and an inner ring of inner swirl blades is arranged. In this case, there are the inner swirl vanes, within the inner tube and the outer swirl vanes in an annular space which consists between the inner tube and a pipe forming the air duct. The swirl blades of both the inner and the outer rim can be adjusted with respect to their angle of attack in each case by means of driven shafts, so that a control of the air flow can be done until it is shut off in the respective areas. Although a relatively uniform ventilation is achieved by means of the above-described Luftdrallauslass, however, makes the pivoting of the swirl blades and the need of the transmission, which synchronizes the movement of all swirl blades, the device technically complex.

task

The invention has for its object to provide a Deckenluftauslass whose Ausströmcharakteristik is adjustable without the use of secondary energy with minimal effort and thus allows the use of an automatic adjusting device. In order to be competitive with the well-known Deckenluftauslässen on the market, the Deckenluftauslass should be easy to design, inexpensive to manufacture and low maintenance during operation.

solution

Starting from the known Deckenluftauslässen the object is achieved according to the invention to the effect that a rectifier element is arranged in the core outlet of the core tube in the flow direction behind the blocking element, wherein by means of the rectifier element, the core air flow in the direction of the flow direction can be aligned.

By arranging the flap on the folding axis according to generally known methods, the fluid dynamic pressure on the faces on both sides of the flap axis depending on the respective design case can be almost compensated and so the flow resistance to an adjustment of the flap can be minimized. By a high-quality storage of the folding axis beyond the frictional resistance, which precludes an adjustment of the flap can be minimized beyond. In addition, flaps as a blocking element compared to the use of sliding valve plates or displaceable core tubes a significant structural simplification, which is reflected directly in the manufacturing and maintenance costs and in the manufacturing cost of Deckenluftauslasses invention.

In principle, a rectifier element with any desired channel cross-section can be used as a rectifier element in combination with a ceiling air outlet according to the invention, as long as the channels run in the direction of flow of the ceiling air outlet and have a wall which runs parallel to the folding axis direction. In particular, such aligned slats can be used as a rectifier element. Rectifier elements are well known in various embodiments and, for example, in the above-cited DE 36 22 146 A1 described.

With the arrangement of the rectifier element in the core outlet on the one hand turbulence of the core air flow with increasing distance from the blocking element are increasingly compensated and for others the visual impression of the ceiling air outlet according to the invention is improved by covering the core tube cavity.

The blocking element of a Deckenluftauslasses invention may in particular have exactly one flap. Thus, the number of required for the adjustment of the locking element mechanical components - levers, push and pull rods - can be reduced to a minimum, which in turn simplifies the construction.

Alternatively, the blocking element of a ceiling air outlet according to the invention can also have a plurality of flaps with folding axes running parallel in a plane perpendicular to the direction of flow. Thus, the flow-related load on each flap is reduced, so that here easier, especially lighter and cheaper materials and less high quality bearing elements can be used. In addition, the flow dynamic design of narrower flaps is less expensive, because buoyancy and suction effects need less to be considered here.

Particularly preferably, flaps arranged opposite one another can be folded in opposite directions of rotation on such a ceiling air outlet. When opening the locking element then arises between each pair of flaps fluidly directed parallel to the flow direction of the Deckenluftauslasses nozzle, which aligns the core air flow parallel to the flow direction of the Deckenluftauslasses and at the same time evened with increasing number of parallel flaps.

An inventive ceiling air outlet preferably has an adjusting device by means of which the folding angle is adjustable. A direct intervention in the Deckenluftauslass is then not required to change its Ausblascharakteristik. In particular, such an adjusting device may be an outwardly guided manually operated lever or an electromotive drive controlled by a central control unit.

However, in such a control device, the folding angle is particularly preferably set automatically depending on a temperature difference between a room air sensor and a supply air sensor. Such an automatic adjusting device, as for example in the above cited DE 196 51 480 A1 described, allows the autonomous - independent of secondary energy or manual intervention - operation of the invention Deckenluftauslasses. In particular, the installation, operating and maintenance costs of the ventilation system are significantly reduced by the use of such inventive ceiling air outlets.

While the previously known constructions of Deckenluftauslässen with vertically adjustable rings, aperture or angle adjustable swirl blades in the production of expensive and in the application, especially in the industrial sector due to the many and sometimes large adjustment for pollution and damage are vulnerable, the Deckenluftauslässe invention provide a very simple, but highly efficient adjustment mechanism.

embodiment

Fig. 1

einen ersten erfindungsgemäßen Deckenluftauslass,

Fig. 2a

diesen Deckenluftauslass im Kühlfall,

Fig. 2b

in einer Zwischenstellung und

Fig. 2c

im Heizfall.

The invention will be explained below with reference to exemplary embodiments. It show in a schematic representation

Fig. 1

a first ceiling air outlet according to the invention,

Fig. 2a

this ceiling air outlet in cooling,

Fig. 2b

in an intermediate position and

Fig. 2c

in the heating case.

FIG. 1 shows a first invention Deckenluftauslass 13 with a straight outer tube 2 with rounded down spout 3 and a concentrically arranged therein, open-topped core tube 19. By means of Deckenluftauslasses 13 is a supply air from an air conditioning system in a room feasible. The room, the ventilation system and the supply air are not shown.

Between the outer tube 2 and the core tube 19, a swirling air flow, not shown, is guided over a plurality of stationary swirl vanes 5 and emerges from the annular swirl outlet 24 substantially horizontally, ie perpendicular to the vertically running throughflow direction 16 of the ceiling air outlet 13.

The Deckenluftauslass 13 has a blocking element 14 which consists of a single flap 15, which in turn is foldable about a perpendicular to the flow direction 16 pivot axis 17. The core air flow (not shown) deflected by the flap 15, which is inclined at an angle to a side 18 of the core tube 19, in particular during the transitional seasons, is aligned in the flow direction 16 by a rectifier element 21 arranged at the core outlet 20.

The Figures 2a, 2b and 2c show by way of example the flow conditions at the ceiling air outlet 13th

In cooling case is according to FIG. 2a the core tube 19 blocked by the blocking element 14. The supply air flow is guided as a pure swirl air flow 22 over the swirl vanes 23 and exits horizontally through the swirl outlet 24 from the ceiling air outlet 13.

In an intermediate position according to FIG. 2b as typically chosen in the transitional seasons, the blocking element 14 is continuously opened and releases a correspondingly increasing core air flow 25 which emerges vertically through the core outlet 20 from the ceiling air outlet 13. The core air stream 25 induces an unillustrated axial component to the swirl air flow 26, so that the supply air flow formed from both is aligned relatively broadly in the space.

In case of heating is in accordance with Figure 2c the blocking element 14 is opened. While the swirl vanes 23 act as throttles in the swirl air flow 27, the supply air essentially flows out from the ceiling air outlet 13 as core air flow 28 in the axial direction through the core outlet 20. The swirl air flow 27 is impressed a strong axial component, not shown, so that the supply air flow flows vertically total in the room.

2

Außenrohr

3

Auslauf

5

Drallschaufeln

13

Deckenluftauslass

14

Sperrelement

15

Klappe

16

Durchströmrichtung

17

Klappachse

18

Seite

19

Kernrohr

20

Kernauslass

21

Gleichrichterelement

22

Drallluftstrom

23

Drallschaufel

24

Drallauslass

25

Kernluftstrom

26

Drallluftstrom

27

Drallluftstrom

28

Kernluftstrom

In the figures are

2

outer tube

3

outlet

5

swirl blades

13

ceiling diffuser

14

blocking element

15

flap

16

flow direction

17

folding axis

18

page

19

core tube

20

core outlet

21

Rectifier element

22

Swirl air flow

23

swirl blade

24

Drallauslass

25

Core airflow

26

Swirl air flow

27

Swirl air flow

28

Core airflow

Claims (6)

1. Ceiling air outlet (13) with an outer pipe (2), with a core pipe (19), which is arranged concentrically inside the outer pipe, turbulence blades (5, 23) between the core pipe (19) and the outer pipe (2), by means of which a turbulent air flow (22, 26, 27) can be guided in such a manner that it exits essentially perpendicularly with respect to a through-flow direction (16) of the ceiling air outlet (13) from a circular ring-shaped turbulence outlet (24), and with a blocking element (14) which is arranged in the core pipe (19), by means of which blocking element (14) core air flow (25, 28), which is guided through the core pipe (19) to a core outlet (20), can be blocked, with the blocking element (14) having at least one flap (15) which can be swung by a flap angle about a flap axis (17), which runs perpendicularly to the through-flow direction (16), characterised in that a rectifier element (21) is arranged in the core outlet of the core pipe (19) downstream of the blocking element (14) in the through-flow direction (16), with it being possible for the core air flow (25, 28) to be aligned in the direction of the through-flow direction (16) by means of the rectifier element (21).
2. Ceiling air outlet (13) according to the preceding claim, characterised in that the blocking element (14) has exactly one flap (15).
3. Ceiling air outlet according to Claim 1, characterised by a plurality of flaps with flap axes running parallel in a plane which is perpendicular to the through-flow direction.
4. Ceiling air outlet according to the preceding claim, characterised in that flaps arranged adjacently to each other can be swung in the opposite direction of rotation.
5. Ceiling air outlet (13) according to one of the preceding claims, characterised by an adjustment device by means of which the flap angle can be adjusted.
6. Ceiling air outlet (13) according to the preceding claim, characterised in that the flap angle is adjusted automatically as a function of a temperature difference between a room air sensor and an incoming air sensor.

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