BE1024668A1 - Ventilation device - Google Patents

Abstract

This invention relates to a ventilation device (1) comprising an air flow channel (2), and a self-regulating valve (5), which is arranged tiltably in the air flow channel (2) and comprises a control leg (7) and a non-return leg (8), which are arranged on either side of the tipping point (6) at an angle with respect to each other and can be inflowed by the air flow, such that this self-regulating valve (5) under negative pressure at the outlet (4) with respect to the inlet (3) when rising pressure difference between the inlet (3) and the outlet (4) moves in a first direction of rotation (R) to limit the air flow opening with the aid of the control leg (7), and in the event of overpressure at the outlet (4) relative to the inlet ( 3) with increasing pressure difference in a second direction of rotation (S) to limit the airflow opening with the help of the non-return leg (8).

Description

(71) Applicant (s):

RENSON VENTILATION NV

8790, WAREGEM

Belgium (72) Inventor (s):

THE NEVE Marnix Dominique Maurice Alberic

9880 AALTER

Belgium

THE RUYTTER Charlotte Christine Bart

9700 MATER

Belgium

LONCKE Sean Henri Mauricette

8790 WAREGEM

Belgium (54) Ventilation device (57) This invention relates to a ventilation device (1) comprising an air flow channel (2), and a self-regulating valve (5), which is arranged tiltably in the air flow channel (2) and a regulating leg (7 ) and comprises a non-return leg (8), which are arranged on either side of the tilting point (6) at an angle to each other and which are flowable through the air flow, such that this self-regulating valve (5) at underpressure at the outlet (4) moves relative to the inlet (3) in the first direction of rotation (R) when the pressure difference between the inlet (3) and the outlet (4) increases, in order to limit the airflow opening using the regulating leg (7), and in the event of overpressure at the outlet (4) relative to inlet (3) with increasing differential pressure in a second direction of rotation (S) to limit the airflow opening with the help of the kickback leg (8).

Fia 4

BE2016 / 5786

VENTILATION DEVICE

The present invention relates to a ventilation device comprising an air flow channel, for the flow of air from an entrance to an exit of this air flow channel and a self-regulating valve arranged tiltably around a tilting point in the air flow channel to control an air flow opening in the air flow channel, such that this self-regulating valve moves in a first direction of rotation in the case of an underpressure at the outlet with respect to the inlet with an increasing pressure difference between the inlet and the outlet in order to limit the air flow opening and with overpressure at the outlet with respect to the inlet with an increasing pressure difference in a second direction of rotation moves in the opposite direction to the first direction of rotation to limit the airflow opening.

In addition, the present invention relates to a method for adapting an existing ventilation device to a ventilation device according to this invention.

The pressure differences across building components, including ventilation facilities, are constantly subject to Veränderungen due to varying temperature differences, wind speeds and directions, as well as the use of the building (opening doors and windows, use of ventilation devices). In conventional ventilation devices this leads to a constant change of the air flow. More and more ventilation devices are equipped with an automatic adjustment of the air flow opening (passage section) and therefore also the air flow rate as a function of the pressure difference over the ventilation grille (the ventilation device). Such ventilation devices are known, inter alia, from NL 1 025 600 C2, EP 0 606 945 A1, NL 1 014 499 C, EP 2 051 020 A1, EP 0 362 913 A1, EP 0 503 722 A1, NL 9 102 132 A , DE 35 28 527 A1 etc. and are usually called self-regulating.

BE2016 / 5786

Such self-regulating ventilation grids can be provided with a self-regulating valve for their regulation, which automatically changes the passage section or the air flow opening of a ventilation device when the pressure difference over the ventilation device changes. This invention relates to such ventilation devices operating without an actuator or motor (with an autonomously operating, self-regulating valve).

Such ventilation devices are typically provided for supplying outside air into an interior of a building. It is usually undesirable that wärmere indoor air from the interior of the building would flow out through this ventilation device. DE 35 28 527 AI describes such a ventilation device with a self-regulating valve which, in the event of an overpressure of the outlet relative to the inlet, restricts the air flow opening when the pressure differential increases over the valve and even closes completely at a certain pressure difference, so that air is prevented from entering. would flow in the opposite direction through the ventilation grille. In normal operation, however, this self-regulating valve prevents the supply of air through this ventilation device too much, so that such a ventilation device cannot be made compact.

The object of the present invention is to provide such a ventilation device, in which the valve has a self-regulating function under negative pressure and also in case of overpressure of the outlet relative to the inlet with increasing pressure difference, this valve restricts the supply of during normal operation, the air through the air flow opening is minimally obstructed, so that the ventilation device can be made more compact.

This object of the invention is achieved by providing a ventilation device comprising an air flow channel, for the flow of air from an entrance to an exit of this air flow channel and a self-regulating valve arranged tiltably around a tilting point in the air flow channel around a regulate the airflow opening in the airflow channel so that it

BE2016 / 5786 self-regulating valve when the underpressure at the outlet relative to the inlet moves with a rising pressure difference between the inlet and the outlet in a first direction of rotation to limit the airflow opening and with overpressure at the outlet with respect to the inlet when an increasing pressure difference in a second direction of rotation moves opposite to the first direction of rotation to restrict the airflow opening, the self-regulating valve comprising a control leg raised from the entrance to the exit before the tipping point and comprising a recoil leg seen from the entrance to the exit mainly after the tilting point has risen, at an angle to the control leg, the control leg and the recoil leg can be inflowed by the air flow, such that under the influence of the air flow with underpressure at the outlet relative to the entrance with increasing pressure difference, the air flow opening is automatically adjusted using the rege In the case of overpressure at the outlet relative to the inlet, if the pressure difference increases, the airflow opening is automatically adjusted using the kickback leg.

By providing a separate leg, i.e. a regulating leg and a recoil leg for the self-regulating function and for the recoil function, and providing this regulating leg and recoil leg with the specific arrangement according to the invention, the self-regulating valve only minimizes the air flow during normal operation. and this self-regulating valve moves much more smoothly. "At an angle with respect to each other" should be interpreted broadly, in the sense that these legs are not fully aligned. The legs themselves can take all kinds of forms and possibly also stand partly in line with each other. Preferably, however, these legs are also angled relative to each other.

By "flowable" it is indicated that the air flow can act on the relevant leg, such that a movement of the self-regulating valve is hereby initiated.

BE2016 / 5786

In a preferred embodiment, the self-regulating valve is arranged in the air-flow duct such that in the event of a negative pressure at the outlet relative to the inlet, with increasing pressure difference, the forces acting on the recoil leg first consider relative forces, if any, that act on the regulating leg and eventually the forces that act on the regulating leg compared to any forces acting on the recoil.

More specifically, the valve can be arranged in such a way that with negative pressure at the outlet relative to the inlet, with increasing pressure difference, the recoil leg is first flowed in, after which both the regulating leg and the recoil leg are flown in and only the regulating leg is flowed in thereafter.

In order to limit the outward flow of wärmere indoor air as much as possible, the self-regulating valve is preferably arranged in the air flow duct such that the air flow opening is closed by means of the non-return leg in the event of overpressure at the outlet relative to the inlet at a certain pressure difference.

Preferably, the regulating leg and the recoil leg are the only air-flowable legs of the self-regulating valve of a ventilation device according to this invention.

In a preferred embodiment, the control leg and the recoil leg are designed such that the rotation in the first direction of rotation with increasing pressure difference is slower than the rotation in the second direction of rotation with increasing pressure difference.

Furthermore, the self-regulating valve is designed in such a way that when there is no pressure difference between the inlet and the outlet, the non-return leg partially closes the flow opening.

BE2016 / 5786

In a particularly preferred embodiment, the self-regulating valve is placed on one or more support members to arrange it in the air flow channel. By placing the valve on a support body in this manner, a line contact typically arises between the valve and this support body, which forms the said tilting point. During the tilting of the valve, this line contact can move, whereby the said tilting point will also move.

In a specific embodiment of a ventilation device according to the present invention, the self-regulating valve comprises a hook element, and the ventilation device comprises a corresponding hook element arranged in the air-flow channel, to which the hook element of the self-regulating valve is hooked to attach the self-regulating valve in the air-flow channel. to set.

When, in such an embodiment, the self-regulating valve is supported on a support body, this support body is then designed as a said hook element.

In a special embodiment of a ventilation device according to this invention, the tilting point is arranged at the top of the air flow channel, so that the self-regulating valve is arranged mainly at the top of the air flow channel.

Preferably, the self-regulating valve of a ventilation device according to this invention is positioned closer to the entrance of the air flow channel than to the exit.

The control leg of a ventilation device according to this invention preferably extends mainly between the tilting point and the entrance. The kickback leg preferably extends between the tipping point and the exit.

In addition, the object of this invention is also achieved by providing a method for adapting a ventilation device, comprising an air flow channel for air flowing from an entrance to an exit of this air flow channel, wherein a self-regulating valve in the

BE2016 / 5786 air flow channel is provided such that an above described embodiment of a ventilation device according to this invention is obtained.

More specifically, this method may be provided for adapting a ventilation device comprising a self-regulating valve disposed tiltably around a tilting point in the airflow channel to control an airflow opening in the airflow channel, the present self-regulating valve then preferably being replaced by a self-regulating valve with which an above-described embodiment of a ventilation device according to this invention is obtained.

The present invention will now be further elucidated with reference to the following detailed description of a preferred ventilation device according to the present invention. The purpose of this description is only to provide illustrative examples and to indicate further advantages and details of the present invention, and thus cannot be construed as limiting the scope of the invention or the patent rights claimed in the claims.

In this detailed description, reference numerals are used to refer to the accompanying drawings, in which

Figure 1 shows a ventilation device according to the prior art schematically in cross section;

Figure 2 is a schematic cross-sectional view of the ventilation device of figure 1 with underpressure at the outlet relative to the inlet; Figure 3 is a schematic cross-sectional view of the ventilation device of figure 1 with a falling pressure difference compared to figure 2;

Figure 4 is a schematic cross-sectional view of a ventilation device according to the invention;

BE2016 / 5786

Figure 5 is a schematic cross-sectional view of the ventilation device of figure 4 with underpressure at the outlet relative to the inlet; Figure 6 is a schematic cross-sectional view of the ventilation device of figure 4 with an increasing pressure difference compared to figure 5;

Figure 7 is a schematic cross-sectional view of the ventilation device of figure 4 with a falling pressure difference compared to figure 6;

Figure 8 shows the ventilation device of figure 4 schematically in cross section at overpressure at the outlet with respect to the inlet; Figure 9 shows the ventilation device of figure 1 diagrammatically in cross-section with increasing pressure difference compared to figure 8.

The depicted ventilation devices (1) are typically ventilation grids (1) that are provided for recessed or surface mounting on top of a window, to allow air flow through a wall where this window is built in.

These ventilation devices (1) comprise a number of partial profiles, which are assembled into an upper profile (12) on the one hand and a lower profile (13) on the other. The different partial profiles can, for example, be made of plastic or aluminum, for example by extrusion. Together with headboards that are attached to the ends of these profiles (12, 13), these profiles (12, 13) form an elongated, mainly beam-shaped housing for the ventilation grids (1).

Between the top profile (12) and the bottom profile (13) extends an air flow channel (2) through which air can flow from an entrance (3) typically located in an outdoor space to an exit (4), which typically is installed in an interior. With the aid of the ventilation device (1), fresh air can then be supplied from the outer space to the inner space.

A self-regulating valve (5) is suspended tiltably around a tilting point (6) in the airflow channel (2). To this end, in the illustrated ventilation devices (1) there is a

BE2016 / 5786 Hook-shaped profile part (9) in the top profile (12). The self-regulating flap (5) is in turn provided with a hook-shaped part (10), with which this flap (5) is hooked over the hook-shaped profile part (9) in the upper profile (12) to hang this flap (5) in the airflow channel (2).

The self-regulating valve (5) can for instance be manufactured from plastic by extrusion.

The self-regulating valve (5) of the ventilation device (1) according to the invention comprises a control leg (7) extending mainly on a first side of the tilting point (6) and a non-return leg (8) mainly on a second side from the tipping point (6), viewed in accordance with the air flow direction. This control leg (7) and this recoil leg (8) are arranged mainly according to the air flow direction and are both inflowable.

The counterweight (11) of the self-regulating valve (5) at the ventilation device (1) according to the prior art does not mainly extend according to the air flow direction and is not flowable, since the air flow cannot act on it in such a way that a movement of the self-regulating valve (5) is initiated.

Below we clarify the difference in operation of both self-regulating valves shown (5). When there is underpressure at the outlet (4) relative to the inlet (3), as shown in Figures 2 and 5, an airflow starts through the airflow channel (2). This air flow moves the self-regulating valve (5) in a first direction of rotation (R). With both self-regulating valves (5), the air flow opening is gradually cut off during this tilting movement, so that, with increasing pressure difference, the air flow is automatically adjusted in function of the pressure difference.

In the illustrated self-regulating valve (5) according to the invention, the air flow hereby initially only has an impact on the inner part of the self-regulating valve (5), whereby only the non-return leg (8) is flowed in, as can be seen in

BE2016 / 5786 figure 4. Only after a certain angular rotation does the air flow also have an impact on the outer part of the self-regulating valve (5), whereby the regulating leg (7) is also flowed in, as can be seen in figure 5. impact on the inner part of the self-adjusting valve (5) gradually disappears and only the regulating leg (7) is flown in, as can be seen in figure 6. In this way, the movement of the self-adjusting valve (5) is more even compared with the existing self-regulating valve (5).

When the airflow reverses and there is overpressure at the outlet (4) relative to the inlet (3), the airflow moves the self-regulating valve (5) in opposite direction of rotation (S).

The prior art self-regulating valve (5) is hereby returned to its initial position, as shown in Figure 3.

With the self-regulating valve (5) according to the invention, it is also first returned to its starting position (figure 4), after which the air flow has a large impact on the outer part of the valve (5), with only the recoil leg (8) being flown in, as can be seen in figure 8, until this kickback leg (8) closes the airflow opening, as can be seen in figure 9 and air discharge via the ventilation grille (1) is prevented.

The self-regulating valve (5) according to the invention has the additional advantage that so-called flapping of this valve (5), i.e. striking the valve (5) against the upper profile (12), is avoided. If there is underpressure at the outlet (4) relative to the inlet (3) and the valve (5) has mainly closed the flow opening, the valve (5) will tilt back when the pressure difference drops. In the prior art, the valve (5) tilts so rapidly that it starts to flap. With the valve (5) according to the invention, the inner part of the valve (5) already experiences the impact of the rest of the airflow through the airflow channel (2) after a small rotation, as can be seen in figure 7, so that the movement of the valve (5) is slowed down and the risk of chattering is considerably reduced.

BE2016 / 5786

Claims (15)

CONCLUSIONS Ventilation device (1) comprising an air flow channel (2), for the flow of air from an inlet (3) to an outlet (4) of this air flow channel (2) and a self-regulating valve (5) which can tilt around a Tipping point (6) is raised in the airflow channel (2) to control an airflow opening in the airflow channel (2), such that this self-regulating valve (5) at underpressure at the outlet (4) relative to the inlet (3) when rising pressure difference between the inlet (3) and the outlet (4) moves in a first direction of rotation (R) to limit the airflow opening and with overpressure at the outlet (4) relative to the inlet (3) with increasing pressure difference in a second direction of rotation (S) moves opposite to the first direction of rotation (R) to limit the airflow opening, characterized in that the self-regulating valve (5) comprises a control leg (7) seen from the inlet (3) to the outlet (4), mainly for the tipping point (6) is o and includes a recoil leg (8), which has risen from the entrance (3) to the exit (4), mainly after the tipping point (6), at an angle to the control leg (7), the control leg (7) and the recoil leg (8) can be inflowed by the air flow, such that under the influence of the air flow at underpressure at the outlet (4) relative to the inlet (3) with increasing pressure difference, the air flow opening is automatically adjusted using the control leg (7) and in case of overpressure at the outlet (4) relative to the inlet (3), if the pressure difference increases, the airflow opening is automatically adjusted using the recoil leg (8). Ventilation device (1) according to claim 1, characterized in that the self-regulating valve (5) is positioned in the air flow channel (2) in such a way that when the outlet (4) is under pressure with respect to the inlet (3) differential pressure the forces acting on the kickback leg (8) first BE2016 / 5786 consider any forces acting on the regulating leg (7) and ultimately consider the forces acting on the regulating leg (7) relative to any forces acting on the kickback leg (8). Ventilation device (1) according to claim 2, characterized in that the self-regulating valve (5) is arranged in the air flow channel (2) in such a way that if the outlet (4) is under pressure with respect to the inlet (3) when rising differential pressure first only the recoil (8) is approached, then both the regulating leg (7) and the recoil (8) are approached and then only the control leg (7) is approached. Ventilation device (1) according to any one of the preceding claims, characterized in that the self-regulating valve (5) is arranged in the air flow channel (2) such that in the event of overpressure at the outlet (4) relative to the inlet (3) ) at a certain pressure difference, the airflow opening is closed using the kickback leg (8). Ventilation device (1) according to any one of the preceding claims, characterized in that the control leg (7) and the recoil leg (8) are the only legs (7, 8) flowable by the airflow of the self-regulating valve (5) . Ventilation device (1) according to one of the preceding claims, characterized in that the control leg (7) and the recoil leg (8) are designed in such a way that the rotational movement in the first direction of rotation (R) is slower with increasing pressure difference than the rotary movement in the second direction of rotation (S) with increasing differential pressure. Ventilation device (1) according to one of the preceding claims, characterized in that the self-regulating valve (5) is designed such that in the absence of a pressure difference between the inlet (3) and the outlet (4), the recoil leg. (8) partially closes the flow opening. BE2016 / 5786 Ventilation device (1) according to any one of the preceding claims, characterized in that the self-regulating valve (5) is placed on one or more support bodies (9) for arranging it in the air flow channel (2). Ventilation device (1) according to one of the preceding claims, characterized in that the self-regulating valve (5) comprises a hook element (10), and that the ventilation device (1) comprises a corresponding hook element (9) which the air-flow channel (2) is arranged, to which the hook element (10) of the self-regulating valve (5) is hooked in order to arrange the self-regulating valve (5) in the air-flow channel (2). Ventilation device (1) according to claims 8 and 9, characterized in that the hook element (9) of the ventilation device (1) arranged in the air flow channel (2) serves as said support body (9). Ventilation device (1) according to one of the preceding claims, characterized in that the tilting point (6) is arranged at the top of the air flow channel (2), so that the self-regulating valve (5) is arranged mainly at the top of the air flow channel (2). Ventilation device (1) according to any one of the preceding claims, characterized in that the self-regulating valve (5) is arranged closer to the inlet (3) of the air flow channel (2) than to the outlet (4). Ventilation device (1) according to any one of the preceding claims, characterized in that the control leg (7) extends mainly between the tilting point (6) and the entrance (3). BE2016 / 5786 Ventilation device (1) according to any one of the preceding claims, characterized in that the recoil leg (8) extends mainly between the tilting point (6) and the outlet (4). 15. Method for adapting a ventilation device (1) comprising an air flow channel (2) for flowing air from an inlet (3) to an outlet (4) of this air flow channel (2), characterized in that a self-regulating valve (5) is fitted in the airflow duct (2), in such a way that a ventilation device (1) according to one of the 10 previous conclusions are reached. A method according to claim 15, for adapting a ventilation device (1) comprising a self-regulating valve (5), which is tilted around a tilting point (6) in the air-flow channel (2) to provide a Control air flow opening in the air flow channel (2), characterized in that the self-regulating valve (5) present is replaced by a self-regulating valve (5) with which a ventilation device (1) according to one of the preceding claims is obtained. BE2016 / 5786 H 12 'L