FR3061272B1 - MOUTH OF EXTRACTION OR AIR INSUFFLATION - Google Patents

Abstract

The invention relates to an air extraction or blowing mouth comprising a duct (1, 10) intended to be disposed in an orifice in a wall and provided with a radial flange (1A, 1 0A) of support on said wall, a front plate (2, 20) integral with said duct (1, 10) and an element for modulating the air flow (3, 30) movable from an open position to a closed position of the flow d air leaving or entering the mouth between said radial flange (1A, 1 0A) for supporting the duct and said front plate (2, 20), by axial displacement along the longitudinal axis (A) of said duct . According to the invention, said modulation element (3, 30) comprises two parts for guiding the air flow, front (3A, 30A) and rear (3B, 30B), tubular with a longitudinal axis parallel to the longitudinal axis ( A) of said duct, these two guide parts being capable of ensuring the passage of the flow of air leaving or entering the mouth between said flange (1A, 1 0A) radial support of the duct and said front plate (2 , 20) in the open position and a channel (3C, 30C) disposed between the two guide parts being capable of ensuring the passage of the air flow leaving or entering the mouth between said flange (1A, 1 0A) radial d support of the conduit and said front plate (2, 20), in an intermediate position between said open position and said closed position.

Description

The invention relates to a mouth for extraction or air insufflation.

These vents are connected to ventilation units or other equipment for extracting or blowing air into the building to be treated by means of ducts. These ventilation systems, in particular centralized ventilation systems of the controlled mechanical ventilation type, often installed in the attic or roof terraces, are visible in the housing by these mouths that aesthetically mask the air inlet or outlet. .

These vents can integrate additional functions, for example an orientation of the airflow by means of flaps, a control of a constant flow, a modulation of the flow according to the hygrometry of the room or a modulation of the flow in function a presence in the room.

In particular, in certain applications, for example in the case of kitchen equipment, it is desired to have two levels of extraction or insufflation flow corresponding to a maximum flow rate and an intermediate flow rate.

It is known to obtain these two levels of flow by means of flaps arranged frontally to the flow of air and more or less inclined.

The pressure drops are, however, relatively large in such an arrangement of front flaps.

Furthermore, patent document KR 20-2015-0003460 discloses a mouth having a duct intended to be arranged in a wall and provided with a support flange on the wall, an outer front face plate having a front surface greater than the inner section of the duct and supporting the end of a central shaft also supported by the duct and on which can slide a modulation plate air flow through the mouth. This mouth however allows only one level of flow, in its open position. The invention solves these problems by proposing an air extraction or blowing mouth which ensures two levels of flow while limiting the pressure losses and which is of limited size, of optimal aesthetics since it does not have any air passage port visible from the outside and excellent mechanical stability, while being particularly simple manufacturing.

To do this, the invention proposes an air extraction or insufflation mouth comprising a duct intended to be disposed in an orifice of a wall and provided with a radial support flange on said wall, a plate a facade integral with said duct and an air flow modulation element movable from an open position to a closed position of the air flow exiting from or entering the mouth between said radial support flange of the duct and said air intake plate; frontage, by axial displacement along the longitudinal axis of said duct, mouth characterized in that said modulation element comprises two airflow guide portions, front and rear, tubular longitudinal axis parallel to the longitudinal axis said duct, these two guide portions being adapted to ensure the passage of the air flow out of or entering the mouth between said radial support flange of the duct and said front plate in the open position and a channel disposed between the two guide portions being adapted to ensure the passage of the air flow out of or entering the mouth between said radial support flange of the duct and said faceplate, in an intermediate position between said open position and said closed position.

The tubular constitution of the guide portions ensures an optimal space saving in the thickness of the mouth.

This arrangement also ensures a mechanical robustness of all the parts constituting the mouth.

The flow of air exiting from or entering the mouth between said radial support flange of the duct and said facade plate flows over substantially 360 degrees and the tubular guide portions ensure its closure on a substantially axisymmetric section. The passage of air in the duct is therefore invisible from the fitted room which ensures an aesthetic effect.

In addition, by such a constitution, it is easy by construction to change the passage section of the air flow through the mouth.

Thanks to the invention, also, the pressure drop in the open position is greatly reduced, which can reduce the operating pressure of the ventilation unit, and thus the noise and consumption generated.

By "guide portion", it is understood a portion actually cutting the air stream in two parts, continuous and preferably not perforated in the air path.

According to a preferred embodiment of the invention, the two said air flow guide portions, front and rear, tubular are of the same longitudinal axis as said conduit.

Preferably, the two said air flow guide portions, front and rear, tubular are radially flared curve generator.

By "curve generator" is meant the general shape of the guide parts. Potentially, amenities can be placed at specific locations.

This shape of the guiding portions ensures optimum guidance of the air flow exiting from or entering the mouth between the radial support flange of the duct and said facade plate and reduces the pressure losses.

Advantageously, it comprises a drive actuator of said modulation element held between the rear face of said front plate and said modulation element.

Preferably, said modulation element comprises a rear tubular portion having the same longitudinal axis as said straight duct and generator, carrying an external thread and movable from said open position to said closed position, by rotation of this thread in an internal thread of said duct. .

Said tapping may be discontinuous, to ensure a good demoldability and to limit the friction problems related to geometric defects.

Alternatively, this tapping can also be continuous if one wishes even more to limit the pressure drops and the leak passing through this tapping. On the other hand, it is more difficult to manufacture.

Preferably, said duct carries on its inner face a stop pin in axial displacement cooperating with the rear end of said rear tubular portion, in the closed position.

Advantageously, said front guide portion comprises a tubular front drive portion of the same longitudinal axis as said conduit and right generator, this driving portion being intended to be driven by said actuator.

And said drive portion preferably comprises an internal toothing cooperating with a gear connected to said actuator which is a rotary electric motor, this gear having a height strictly greater than the displacement amplitude of said modulation element. The front end of said modulation element may comprise at least one tooth providing a stop locked in rotation with at least one corresponding tooth arranged on said front plate.

Preferably, the front end of said front guide portion is in substantially sealing abutment against said radial support flange, in the closed position.

According to another embodiment of the invention, said modulation element comprises a rear tubular support portion having the same longitudinal axis as said duct and generator right, and sliding by translation on the inner face of the duct.

According to a first variant, said drive actuator of said modulation element is integral with said front plate or said radial support flange and said modulation element comprises a tapping or a rack cooperating with a screw connected to said actuator which is a rotary engine, this tapping, this rack or this screw having a height strictly greater than the displacement amplitude of said modulation element.

The tapping may alternatively be replaced by one or more rack type connections or equivalent.

According to a second variant, said drive actuator is connected to an endless screw axially substantially perpendicular to the longitudinal axis of said conduit, which it drives in rotation and on which is moved a nut connected by a first articulated lever to said front plate and a second lever articulated to said modulation element.

The mouth is preferably equipped with at least one energy recovery device at least partially ensuring its electrical self-supply and providing an electrical signal and in that it comprises an electronic processing device of said electrical signal.

Alternatively, the mouth can also be powered by replaceable batteries or by a wire feed from a ventilation group.

Advantageously, said energy recovery device comprises a turbine disposed within said rear guide portion, at the rear of said front guide portion, said turbine being connected to a generator transforming its rotational mechanical energy into said electrical signal. correlated to the flow of air through the mouth.

The energy recovery device may also be a solar panel capturing the lighting of the room to be ventilated, the photovoltaic cell of which is preferably placed on the visible face of the facade plate.

Said turbine is preferably a helical turbine whose axis of rotation is substantially parallel to the longitudinal axis of said duct.

Advantageously, said facade plate has a front surface greater than the inner section of said duct.

Said facade plate preferably has its smallest frontal dimension greater than the maximum diameter of said flange of said duct.

A control device of said actuator may be included on a printed circuit board on said mouth.

This control device is advantageously controlled according to the state of a sensor connected to said printed circuit and / or according to a flow measurement in the sheath in fluid communication with the mouth and / or according to a control instruction provided by the user. The invention also relates to a ventilation installation provided with a fan and a ductwork network, comprising at least one such mouth in air communication with said network and said fan. The invention is described below in more detail with the aid of figures representing only preferred embodiments of the invention.

Figure 1 is a longitudinal sectional view of a mouth according to a first embodiment of the invention, in the closed position.

Figure 2 is a longitudinal sectional view of a mouth according to this first embodiment of the invention, in the intermediate position.

Figure 3 is a longitudinal sectional view of a mouth according to this first embodiment of the invention, in the open position.

Figure 4 is a perspective view in longitudinal section of a mouth according to this first embodiment of the invention, being opened.

Figure 5 is a perspective view in longitudinal section of a mouth according to a second embodiment of the invention, in the closed position.

Figure 6 is a perspective view and in longitudinal section of a mouth according to this second embodiment of the invention, in the intermediate position.

Figure 7 is a perspective view in longitudinal section of a mouth according to this second embodiment of the invention, in the open position.

Figure 8 is a perspective view and in longitudinal section of a mouth according to this second embodiment of the invention, being opened.

Figure 9 is a cross sectional view of a mouth according to this second embodiment of the invention.

Figure 10 is a perspective view in longitudinal section of a mouth according to a variant of this second embodiment of the invention, in the closed position.

Figure 11 is a perspective view in longitudinal section of a mouth according to this variant of this second embodiment of the invention, in the intermediate position.

Figure 12 is a perspective view in longitudinal section of a mouth according to this variant of this second embodiment of the invention, in the open position.

Figure 13 is a longitudinal sectional view of a mouth according to this variant of this second embodiment of the invention, being opened.

Figure 14 is a perspective view and in longitudinal section of detail of a mouth according to this variant of this second embodiment of the invention, in the open position.

Figures 1 to 4 show a first embodiment of a mouth according to the invention.

This mouth of extraction or air insufflation comprises a conduit 1 intended to be disposed in an orifice of a wall and provided with a radial flange 1A support on the wall, a front plate 2 secured to the duct 1 and an air flow modulation element 3 movable from an open position to a closed position of the flow of air exiting from or entering the mouth between the radial support flange 1A of the duct and the front plate 2 , by axial displacement along the longitudinal axis A of the duct.

The face plate 2 has a front surface greater than the inner section of the duct 1 and advantageously has its smallest frontal dimension greater than the maximum diameter of said flange 1A of said duct.

A ventilation installation provided with a fan and a network of ducts, comprises at least one such mouth in air communication with the network and the fan. The modulation element 3 comprises two air flow guiding parts 3A and 3B, tubular longitudinal axis parallel to the longitudinal axis A of the duct, these two guide portions being able to ensure the passage of the duct. flow of air exiting from or entering the mouth between the radial support flange 1A of the duct and the face plate 2 in the open position (FIG. 3) and a channel 3C disposed between the two guide portions 3A, 3B being suitable to ensure the passage of the flow of air out of or into the mouth between the radial support flange 1A of the duct and the front plate 2, in an intermediate position (Figure 2) between the open position and said closed position.

More specifically, the two so-called airflow guide portions, 3A front and rear 3B, tubular are of the same longitudinal axis A as the radially flared curve and generatrix duct.

The mouth comprises a drive actuator 4 of the modulation element 3 held between the rear face of the front plate 2 and the modulation element 3. The modulation element 3 comprises a rear tubular portion 3D of the same axis longitudinal A that the duct 1 and generator right, carrying an external thread 3E and movable from the open position to the closed position, by rotation of the thread 3E in a internal thread 1B discontinuous conduit. The duct 1 carries on its inner face a stop pin in axial displacement and in rotation 1F cooperating with a corresponding pin of the rear end of the rear tubular portion, in the closed position.

This rear tubular portion 3D is also a rear tubular support portion of the guide portions 3A, 3B via 3D1 columns connecting these guide portions 3A, 3B with each other and with this rear portion. These 3D1 columns can be three in number, evenly distributed around the periphery of the guide portions 3A, 3B.

Furthermore, the front guide portion 3A comprises a tubular front drive portion 3G having the same longitudinal axis A as the straight generator line, this driving portion being intended to be driven by the actuator 4. This part of 3G drive has an internal gear 3H cooperating with a gear 6 connected to the actuator 4 which is a rotary electric motor. The front end of the drive part 3G comprises at least one tooth 31 providing an abutment locked in rotation with at least one corresponding tooth 2A 2A arranged on the front plate 2, and this, for the open position.

The mouth is also equipped with at least one energy recovery device at least partially ensuring its electrical self-supply and providing an electrical signal and comprises an electronic processing device of this electrical signal.

According to the embodiment shown, this energy recovery device comprises a helical turbine 7 whose axis of rotation is substantially parallel to the longitudinal axis A of the duct, disposed within the rear guide portion 3B, to the rear of the front guide portion 3A, and the turbine 7 is connected to a generator 8 transforming its mechanical rotational energy into the electrical signal correlated to the air flow through the mouth. This correlation can be improved by adding a value representing the position of the modulation element.

A control device of the actuator 4 is included on or connected to a printed circuit (not shown) embedded on said mouth and is controlled according to the state of a sensor connected to said printed circuit and / or according to a measurement of flow in the sheath in fluid communication with the mouth and / or according to a control instruction provided by the user. Since the sensor can be an IAQ sensor (acronym for Indoor Air Quality) or in particular hygrometry, presence detection or other, the user's instruction can be given by wire or radio indicating a level of given opening or a desired mode of operation.

Thanks to this servocontrol, the mouth can thus be arranged in three positions: a closed position shown in FIG. 1, where the front end of the front guide portion 3A is in substantially sealing abutment against the radial flange 1A of FIG. support; an intermediate position shown in FIG. 2, where the flow of air exiting from or entering the mouth between the radial support flange 1A of the duct and the faceplate 2 can circulate in the channel 3C arranged between the two parts guide 3A, 3B; an open position shown in FIG. 3, where the front end of the front guide portion 3A is in abutment against the front plate 2 and where the flow of air flows both in the channel 3C and at the rear of the rear guide portion 3B.

According to the embodiment shown, the turbine 7 is arranged to be in the air flow passing through the channel 3C, in the intermediate position and in the open position. In the open position, the flow of air flowing at the rear of the rear guide portion 3B bypasses the turbine 7, thus reducing the pressure drops and limiting the speed of rotation of the turbine. However, it can also be envisaged to arrange the turbine, so that it is in the air flow passing through the channel 3C and also in the flow of air flowing at the rear of the rear guide portion 3B.

Figures 5 to 13 show a second embodiment of a mouth according to the invention.

This second embodiment differs essentially from the first preceding embodiment by the following feature. The modulation element 30 comprises a rear support tubular portion 30D having the same longitudinal axis A as the duct 10 and generating straight, and sliding on the inner face of the duct, in a simple translation parallel to the axis A.

This support portion 30D carries two airflow guide portions, 30A and 30B front, tubular longitudinal axis to the longitudinal axis A of the conduit 10, the support portion having 30D2 orifices adapted to ensure the passage the flow of air exiting from or entering the mouth between the radial support flange 1 OA of the duct and the front plate 20 towards the guide portions 30A, 30B, in the open position (FIG. 7), and towards a channel 30C disposed between the two guide portions in an intermediate position (Figure 6) between the open position and said closed position.

These two so-called guide portions 30A, 30B of the air flow, front and rear, tubular are of the same longitudinal axis A as the duct 10 and generatrix curved radially flared.

As best seen in FIG. 9, the front end of the modulation element 30, and more precisely of the front guide portion 30A, comprises at least one interlocking notch 30A1 with a fixed portion of the facade plate 20. More specifically, the front plate 20 is integral with the duct 10 by means of feet 20A carried by the rear of this front plate and screwed and this fixed part of the front plate 20 is one of these feet 20A including a flange. longitudinal 20A1 is nested in this notch 30A1.

According to a first variant shown in FIGS. 5 to 8, the driving actuator 40 of the modulation element 30 is integral with the front plate 20 and the modulation element 30 comprises a tapping 70 cooperating with a linked screw to the actuator 40 which is a rotary motor, this tapping 70 or this screw having a height strictly greater than the displacement amplitude of said modulation element 30.

More specifically, this internal thread 70 consists of a threaded section protruding forward of the front guide portion 30A.

This tapping can take the form of a toothed rack slightly oblique. A control device of the actuator 40 is included on a printed circuit board on said mouth and is controlled according to the state of a sensor connected to said printed circuit and / or according to a flow measurement in the sheath in communication with fluid with the mouth and / or according to a control instruction provided by the user.

Thanks to this servocontrol, the mouth can thus be arranged in three positions: a closed position shown in FIG. 5, where the front end of the front guide portion 30A is in substantially sealing abutment against the radial support flange 10A ; an intermediate position shown in FIG. 6, where the flow of air exiting from or entering the mouth between the radial support flange 10A of the duct and the facade plate 20 can circulate in the channel 30C disposed between the two parts of guide 30A, 30B; an open position shown in Figure 7, where the front end of the front guide portion 30A abuts against the faceplate 20 and where the airflow flows both in the channel 30C and at the back of the rear guide portion 30B.

According to a second variant shown in FIGS. 10 to 14, the driving actuator 40 'is connected to a worm 80 having an axis substantially perpendicular to the longitudinal axis of said duct, which it rotates and on which is moved a nut 90 connected by a first lever 1 00A articulated to the front plate 20 and a second lever 100B articulated to the modulation element 30 and more specifically to the front guide portion 30A.

The part carrying the actuator 40 'and the worm 80 also carries a third lever 100C hinged to the front plate 20 and a fourth lever 100D hinged to said modulation element 30 and more precisely to the front guide portion 30A, so to strengthen the mechanical strength.

A control device of the actuator 40 'is included on a printed circuit board on said mouth and is slaved according to the state of a sensor connected to said printed circuit and / or according to a measurement of flow in the sheath in communication fluid with the mouth and / or according to a user-provided control command.

Thanks to this servocontrol, the mouth can thus be arranged in three positions: a closed position shown in FIG. 10, where the front end of the front guide portion 30A is in substantially sealing abutment against the radial support flange 10A ; an intermediate position shown in FIG. 11, where the flow of air exiting from or entering the mouth between the radial support flange 10A of the duct and the front plate 20 can circulate in the channel 30C arranged between the two parts 30A, 30B; an open position shown in Figure 12, wherein the front end of the front guide portion 30A abuts against the faceplate 20 and where the airflow flows both in the channel 30C and at the back of the rear guide portion 30B.

According to the embodiment shown, as previously, the turbine is arranged to be in the air flow passing through the channel 30C, in the intermediate position and in the open position. In the open position, the flow of air flowing at the rear of the rear guide portion 30B bypasses the turbine, thus reducing the pressure drops and limiting the speed of rotation of the turbine. However, it can also be envisaged to arrange the turbine, so that it is in the air flow passing through the channel 30C and also in the flow of air flowing at the rear of the rear guide portion 30B.

In the case of the embodiments and their variants previously described, the front guide portions 3A, 30A and rear 3B, 30B may be of different shapes not necessarily circular, to fit a general shape of the mouth or take into account. the size of a component used in the kinematics. In addition, the ratios of the passage channels both at the flared portion and at the cylindrical portion may be variable according to different criteria, for example compromise between pressure drop, air speed at the turbine, to optimize the starting speed of the turbine or limit its maximum speed, more precise modulation zones, acoustic consideration ...

Claims (4)

REVENDI CATI ONS 1. Mouth for extracting or blowing air comprising a conduit (1, 10) intended to be disposed in an orifice of a wall and provided with a radial flange (1A, 10A) bearing on said wall a facade plate (2, 20) integral with said duct (1, 10) and an air flow modulating element (3, 30) movable from an open position to a closed position of the outgoing air flow of or entering the mouth between said radial support flange (1A, 10A) of the duct and said faceplate (2, 20), by axial displacement along the longitudinal axis (A) of said duct, mouth characterized in that said modulation element (3, 30) comprises two tubular longitudinal-axis front (3A, 30A) and rear (3B, 30B) guiding portions parallel to the longitudinal axis (A) of said led, these two guide portions being adapted to ensure the passage of the flow of air leaving or entering the mouth between said flange (1A, 1 0A) rad said support plate (2, 20) in the open position and a channel (3C, 30C) disposed between the two guide portions being able to ensure the passage of the flow of air exiting from or entering the the mouth between said radial support flange (1A, 10A) of the duct and said face plate (2, 20), in an intermediate position between said open position and said closed position. 2. Mouth according to the preceding claim, characterized in that the two said guiding portions of the air flow, front (3A, 30A) and rear (3B, 30B), tubular are of the same longitudinal axis (A) that said duct (1, 10). 3. Mouth according to claim 1 or 2, characterized in that the two said guide portions of the air flow, front (3A, 30A) and rear (3B, 30B), tubular are radially flared curve generator. 4. Mouth according to one of the preceding claims, characterized in that it comprises a drive actuator (4, 40, 40 ') of said modulation element (3, 30) maintained between the rear face of said facade plate (2, 20) and said modulation element (3, 30). 5. Mouth according to one of the preceding claim, characterized in that said modulation element (3) comprises a rear tubular portion (3D) having the same longitudinal axis (A) as said duct and of right generatrix, carrying an external thread ( 3E) and movable from said open position to said closed position, by rotation of this thread (3E) in an internal thread (1B) of said conduit. 6. Mouth according to the preceding claim, characterized in that said tapping (1B) is discontinuous. 7. Mouth according to claim 5 or 6, characterized in that said duct (1) carries on its inner face a stop pin in axial displacement (1F) cooperating with the rear end of said rear tubular portion (3D), in closed position. Mouthpiece according to claim 4, characterized in that said front guide portion (3A) comprises a tubular front drive portion (3G) of the same longitudinal axis (A) as said duct (1) and of the right generator, this driving part (3G) being intended to be driven by said actuator (4). 9. Mouth according to the preceding claim, characterized in that said driving portion (3G) has an internal toothing (3H) cooperating with a gear (6) connected to said actuator (4) which is a rotary electric motor. 10. Mouth according to the preceding claim, characterized in that the front end of said modulation element (3) comprises at least one tooth (3I) providing a stop locked in rotation with at least one tooth (2A) corresponding arranged on said plate facade (2). 11. Mouth according to one of the preceding claims, characterized in that the front end of said front guide portion (3A, 30A) is in substantially sealing abutment against said flange (1A, 10A) radial bearing, in position closed. 12. Mouth according to one of claims 1 to 4, characterized in that said modulation element (30) comprises a rear tubular portion (30D) support of the same longitudinal axis (A) that said duct (10) and generator right, and sliding on the inner face of the duct. 13. Mouth according to the preceding claim, characterized in that said drive actuator (40) of said modulation element (30) is integral with said front plate (20) or said radial support flange (10A) and said modulation element (30) comprises a tapping (70) or a rack cooperating with a screw (60) connected to said actuator (40) which is a rotary motor, this tapping, this rack or this screw having a height strictly greater than displacement amount of said modulation element (30). 14. Mouth according to claim 12, characterized in that said drive actuator (40 ') is connected to a worm (80) axis substantially perpendicular to the longitudinal axis of said duct, that it drives in rotation and on which is moved a nut (90) connected by a first articulated lever (100A) to said front plate (20) and by a second articulated lever (100B) to said modulation element (30). 15. Mouth according to one of the preceding claims, characterized in that it is equipped with at least one energy recovery device at least partially ensuring its self-power supply and providing an electrical signal and in that it comprises an electronic processing device of said electrical signal. 16. Mouth according to the preceding claim, characterized in that said energy recovery device comprises a turbine (7) disposed within said rear guide portion (3B, 30B) at the rear of said front guide portion. (3A, 30A), said turbine (7) being connected to a generator (8) transforming its mechanical rotational energy into said electrical signal correlated to the air flow through the mouth. 17. Mouth according to the preceding claim, characterized in that said turbine (7) is a helical turbine whose axis of rotation is substantially parallel to the longitudinal axis (A) of said duct (1) · 18. Mouth according to the one of the preceding claims, characterized in that said front plate (2) has a front surface greater than the inner section of said duct (1). 19. Mouth according to one of the preceding claims, characterized in that said front plate (2) has its smallest frontal dimension greater than the maximum diameter of said flange (1A) of said duct. 20. Mouth according to one of claims 4 to 16, characterized in that a control device of said actuator (4) is included on a printed circuit board on said mouth (1). 21. Mouth according to the preceding claim, characterized in that the control device is slaved according to the state of a sensor connected to said printed circuit and / or according to a flow measurement in the sheath in fluid communication with the mouth and / or according to a command instruction provided by the user. 22. Ventilation installation provided with a fan and a network of ducts, characterized in that it comprises at least one mouth according to one of the preceding claims in air communication with said network and said fan.