FR2493917A1 - EXHAUST DEVICE WITH FLOW DEVIATOR EFFECT - Google Patents

Abstract

ACCORDING TO THE INVENTION, IN THIS DEVICE CONSTITUTES AN EXTERNAL TUBE 1 INCLUDING, AT ITS EXHAUST END, A ROUNDED 3 AND A CENTRAL INTERIOR TUBE 4, PROVIDED WITH DEVIATOR BLADES 5 EXTENDING INTO THE SPACE ANNULAR BETWEEN THIS TUBE 4 AND THE EXTERIOR TUBE 1, THE ROUND 3, WHICH INCREASES THE DIAMETER OF THE LATTER IN DIRECTION OF ITS EXHAUST END, IS EXTENDED BY A CONCENTRIC COLLAR 10 WHICH IS SHAPED OF A CYLINDRICAL TRUNCON 11 CONNECTED TO THE ROUND 3, OF A TRUNCONIC TRUNCON 12 WIDELING IN THE DIRECTION OF FLOW FLOW AND OF AN ANNULAR DISK 13 CONNECTED TO THE TRUNCONIC TRUNK 12. AN EXHAUST DEVICE IS IN PARTICULAR APPLICABLE TO AIR CONDITIONING INSTALLATIONS .

Description

The invention relates to an effect exhaust device

  flow deflector, consisting of an outer tube and a central tube dis-

  placed concentrically in the latter, blades or blades of deflection

  extending radially on an annular section between the outer diameter of the central tube and the inside diameter of the outer tube, and a closure

  mounted outside the central tube, which can be introduced into the

  it on the intake side and whose outside diameter corresponds to

  inner diameter of this central tube, the latter comprising, at its end

  admission, a roundness which reduces its section in the direction of

  flow flow and, at the exhaust end, a penetrating diaphragm

  in the free annular section between the two tubes, the outer tube

  with a rounding which increases the diameter towards the former

exhaust trem.

  Exhaust devices of this kind are known and allow to eject horizontally part of the volumetric flow of air and vertically another part. We can vary the ratio of

  two streams or partial currents by changing the position of the shutter.

  Finally, exhaust systems are also known in

  which the overall volumetric flow rate can be varied continuously

  between a horizontal direction and a vertical direction of ejection

by moving a screen.

  The object of the invention is to improve a device for

  the type defined above, so that it is possible, according to the needs, to draw from the injector jet sent vertically

  jets of air sent horizontally and, thus, to deflect the jet.

  To solve this problem, according to the invention, the rounding which

  increases the diameter of the outer tube towards its end of

  escapement is extended by a concentric collar that is formed of a

  a cylindrical section connected to the flange, of a conical section connecting

  of the cylindrical section and widening in the direction of flow of the

  flow, and an annular disc connected to the frustoconical section.

  Thanks to the constitution of the exhaust device according to the invention, the air jets sent horizontally can be drawn from the

  injector jet sent vertically and, thus, be deflected, the flow vol-

  injector jet air lumen which can be modified in known manner

  by changing the position of the shutter. With this change, the ef-

  Injector jet suction jet sent vertically also varies, and so also the direction of the overall airflow. When the central tube is closed by the shutter (volumetric flow of the injector jet = 0), the jet of air leaving the annular section deviates from the axis of the exhaust

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  in a more or less normal direction to enter the room. As a result of the increase in the volumetric flow of air that arrives in the room through the central tube injector jet, the overall air jet is more concentrated and penetrates more upright in the room. From a determined volumetric flow rate of the injector jet, the overall volumetric flow rate is blown down in the room, almost concentrically to

the axis of the jet.

  It is advisable to arrange the possibility of adjusting the shutter so that it is possible to adjust the injector jet, either in small increments, or even, preferably, continuously, the adjustment being possible. perform by appropriate control means. If necessary, the desired result can be obtained by setting the shutter once. A setting without external energy, for example using a

thermostat, is also possible.

  According to a preferred embodiment of the device for

  According to the invention, the opening angle α of the frustoconical section is from 20 to 600, the ratio of the height h of the cylindrical section to its diameter D is between 0 and 0.4, the ratio of the diameter d of the central tube with a diameter D is between 0.1 and 0.5, the ratio of the outside diameter d1 of the diaphragm to the internal diameter d of the central tube is between 1.5 and 3 and the ratio of the height h1 of the annular disc

  13 to the diameter D is equal to or greater than 0.01.

  With determined values of a and h: D, we can arrive at

  ensure that the air jets sent radially, without jet injector, spread not horizontally but at an angle a1 I 0. Plus we choose a large value of a and the ratio h: D, plus A1 is big. Thus, in very high ceilings, the supplied air is not sent horizontally but directly downwards, so that

more or less straight.

  With the exhaust system according to the invention, it is possible

  continuously adjust the volumetric flow of air, from the

  rice in the vertical direction. In the case of a cooling load

  ceiling and low ceilings, it is preferable to have horizontal ejection

  zontal or a small ejection angle a1. In the case of heating and in the case of high ceilings, we aim at a higher ejection angle

  right so that the room can be swept by the air intensively

sive to the ground.

  An exhaust device according to the invention is

  diagrammatically according to one embodiment, given as an example

in the drawings in which:

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  FIG. 1 schematically represents a device for

  exhaust in vertical section; FIGS. 2 to 4 show this device with different positions

shutter.

  The exhaust system according to the invention is

  essentially of an outer tube 1, crossed in the upper part

  top of its free section by a perforated plate 2. The outer tube 1

  has at its exhaust end a rounded 3 increasing its diameter.

  In the outer tube 1 is arranged concentrically a tu-

  be at the center 4, at the outer circumference of which blades or blades

  conveyors 5 extend radially in the annular spacing between

  the outer tube 1 and the central tube 4.

  This central tube is provided, on the exhaust side, with a

  closing diaphragm 6 penetrating the annular spacing and presenting

  te, at its intake end, a rounding 7 which decreases the diameter of the

  central tube 4 in the flow direction of the flow.

  In the inlet zone of the central tube 4 is arranged a

  8 which can be introduced into the central tube 4, on the side of the

admission by a servomotor 9.

  On the exhaust side, at the rounded end 3 of the outer tube 1 concentrically connects a collar 10 formed of a cylindrical section

  11, a frustoconical section 12 connected to the cylindrical section and stretches

  in the direction of flow and an annular disc 13 connected to the

  frustoconical section and directed perpendicularly to the axis of the tube.

  As shown in FIG. 2, the air jets sent by the annular section are deflected by about 90 relative to the central axis of the exhaust device, when the shutter 8 closes the section of the tube.

  central 4 and so there is more jet injector.

  As shown in Figure 3, the jets introduced into the room on the annular section come out by making with the horizontal a

  angle "1 larger than 0, because the shutter 8, in the raised position,

  compared to that shown in Figure 1, allows the constitution

  injector jet sucking the jets coming out of the annular section.

  and deflects them as compared with the representation of FIG. 2.

  As shown in FIG. 4, the suction effect of the injector jet passing through the central tube 4 is so intense, by virtue of the position of the shutter 8, still shifted upwards with respect to that represented in FIG. Figure 3, that the global air jets undergo a concentration and arrive in the room from top to bottom in a straight way

  or vertical, the angle a1 reaching about 90.

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Claims (2)

R E V E N D I C A T I 0 N S   1.- Exhaust device with a flow deflection effect, constituting   killed from an outer tube and a central tube-arranged concentrically therein, vanes or vanes extending radially on a   annular section between the outer diameter of the central tube and the diameter   inside the outer tube, and a shutter, mounted outside the central tube, which can be introduced into the latter on the intake side and whose outer diameter corresponds to the inner diameter of the central tube, the latter comprising , at its intake end, a rounded   which decreases its cross-section in the flow direction of the flow and at the   exhaust system, a diaphragm penetrating into the annular section   between the two tubes, the outer tube having a rounded   which increases the diameter towards the exhaust end,   exhaust system characterized by the fact that the rounding (3), which increases   te the diameter of its outer tube (1) towards its exhaust end, is extended by a concentric collar (10), which is formed   of a cylindrical section (11) connected to the rounded part (3), of a truncated section   cone (12) widening in the flow direction of the flow and a   annular (13) connected to the frustoconical section (12).   2.- Device according to claim 1, characterized in that the opening angle (t) of the frustoconical section (12) is 20 to, that the ratio of the height (h) of the cylindrical section (11) to its diameter (D) is between 0 and 0.4, that the ratio of the diameter (d) of the   central tube (4) with a diameter (D) is between 0.1 and 0.5, that the ratio   of the outer diameter (d1) of the diaphragm (6) to the inside diameter (d) of the central tube (4) is between 1.5 and 3 and that the ratio of the   height (hl) of the annular disc (13) to the diameter (D) is equal to or greater than less than 0.01.