Variable flow ventilation outlet equipped with a plugging element

Abstract

A variable flow ventilation inlet (1) comprising a shuttering device (3) configured to modify a passage cross-section (2) of an airflow, a cover plate (5) configured to be fixed to the ventilation inlet (1), and a pressure measuring device (7) comprising a pressure measuring orifice (74) and a blocking element (71) movable between a rest position in which the blocking element (71) blocks the pressure measuring orifice (74) and a measuring position in which the blocking element (71) blocks the shuttering device (3) in a predetermined position, the blocking element (71) being fixed rigidly to the ventilation inlet (1) and comprising a keying element (72) preventing the blocking face (5) from being fixed to the ventilation inlet (1) when the blocking element (71) is in the measuring position. Figure 1

Description

Title of the invention: Variable flow ventilation outlet equipped with a plugging element technical field

[0001] The invention relates to the field of ventilation systems in a building and more particularly to a ventilation outlet and a ventilation system comprising such an outlet. Prior art

[0002] Buildings, including dwellings, schools or offices, can accommodate people. They generally comprise one or more rooms, and at least one ventilation system for the different rooms, configured to renew the internal air of these rooms.

[0003] The main objective of room air renewal, also called ventilation, is to remove air pollutants related to the presence of occupants, equipment, or machinery used in these rooms, as well as pollutants emitted by the building itself. Air pollutants include, in particular, carbon dioxide (CO2), humidity (i.e., water), and volatile organic compounds known as VOCs.

[0004] In particular, a person breathing a volume of air of approximately 12m3 during a day, it is important, for reasons of hygiene and comfort, to renew the air in rooms, especially closed ones.

[0005] This air is also renewed to control the indoor humidity level of the building.

[0006] In addition, it is necessary to control the air renewal rate in order to limit heat losses due to the evacuation of indoor air, particularly when it is heated in winter.

[0007] A ventilation system generally includes an air extraction system configured to extract internal air from the rooms, and an air supply system configured to blow air from outside to compensate for this extraction.

[0008] In order to optimize room ventilation according to parameters such as humidity levels, it is known to implement variable flow air extraction or supply systems, that is to say, variable flow air extraction or supply systems which include at least one air extraction or supply outlet, hereinafter referred to as a ventilation outlet, having an airflow passage cross-section and at least one shuttering device configured to modify, for example by depending on the humidity level of the air, said airflow passage section in order to adjust it to the correct air renewal rate.

[0009] Thus, when the ventilation system is operating under desired conditions, the flow rate, and therefore the pressure difference between the air inlet and the air outlet of the ventilation grille, is within a nominal operating range. In the event of a fault in the ventilation system, the pressure difference is outside this nominal operating range.

[0010] To ensure the proper functioning of the installation, it is necessary to check the pressure difference between the air inlet and the air outlet of the ventilation outlet, particularly when the installation is being started up.

[0011] There is a known variable flow ventilation outlet solution comprising a pressure measuring device having a measuring orifice allowing the air pressure at the outlet of the ventilation outlet to be measured.

[0012] The pressure measuring orifice is positioned on a functional face of the ventilation outlet. More precisely, the pressure measuring orifice is positioned behind a cover face of the ventilation outlet, said cover face concealing the pressure measuring device when the ventilation outlet is in an operating position.

[0013] Furthermore, this pressure measurement orifice is removably closed by a plug to prevent unwanted airflow from passing through it. During a pressure measurement, the plug is removed from the pressure measurement orifice and positioned at a control module to lock the closure device in the closed position. The control module is positioned on the functional side. Thus, the cross-sectional area of ​​the variable-flow ventilation outlet is known during the pressure measurement, and it is therefore possible to refer to a chart to determine the associated flow rate.

[0014] This variable-flow ventilation grille allows for reliable measurement of the air pressure at the grille outlet. However, after the measurement, when the variable-flow ventilation grille is switched on, the cap is sometimes left in place on the control module. As a result, the ventilation grille is stuck in the closed position without this being visible to the user, since the cover is designed to conceal this part. In other words, the ventilation provided in the building is not as expected.

[0015] Furthermore, it is possible that the cap may be lost when the latter is removed from the control module. Thus, the pressure measurement orifice is not sealed during the operation of the ventilation outlet, and an parasitic airflow may be created, leading to an increase in the ventilation flow rate and potentially unwanted noise.

[0016] There is therefore a need for a plug for a pressure measuring orifice which overcomes the disadvantages listed above. Description of the invention

[0017] One embodiment relates to a variable flow ventilation outlet comprising an airflow passage section, at least one sealing device configured to modify said airflow passage section, at least one cover face configured to be fixed to a functional face of the ventilation outlet, and at least one pressure measuring device comprising a pressure measuring orifice configured to allow measurement of an air pressure downstream of the ventilation outlet and a movable sealing element between at least one rest position in which the sealing element blocks the pressure measuring orifice and at least one measurement position other than at least one rest position,characterized in that the sealing element is fixed permanently to the ventilation opening and comprises at least one keying element configured to prevent the fixing of at least one cover face to the ventilation opening when the sealing element is in at least one measuring position.

[0018] The variable flow ventilation outlet can be an air extraction outlet configured to extract internal air from the rooms, or an air supply outlet configured to blow air from outside in order to compensate for this extraction.

[0019] The ventilation outlet includes an operating position, and a maintenance position, different from the operating position, in which a technician intervenes on the outlet in order, for example, to check its operation.

[0020] The variable flow ventilation outlet includes a shuttering device that allows the airflow passage cross-section to be modified, i.e., varied. The shuttering device is therefore movable between several positions that affect the airflow rate.

[0021] The cover plate is a face that serves an aesthetic function. It conceals the functional face of the ventilation grille when the grille is in the operating position. The cover plate is removed from the functional face in the maintenance position. The cover plate is attached to the functional face in a removable manner.

[0022] The pressure measuring device is used in the maintenance position of the ventilation outlet, for example, during the commissioning of the outlet. Indeed, during commissioning, a check of the flow rate through the outlet is carried out. For this purpose, it is measured that the pressure difference between the air inlet and the air outlet of the ventilation outlet is within a nominal operating range. In other words, we measure the difference in air pressure between the upstream and downstream sides of the vent, with upstream and downstream being defined relative to the direction of the ventilation vent. The upstream side of the vent is opposite the cover face, and the downstream side is opposite the cover face.

[0023] To facilitate pressure measurement downstream of the ventilation outlet, the pressure measuring device includes a pressure measuring orifice. The pressure measuring orifice allows, via a measuring device independent of the ventilation outlet, the pressure downstream of the outlet in a ventilation circuit to be measured.

[0024] The measuring orifice is blocked, in the operating position, by a blocking element. The blocking element is then in the rest position. Thus, the blocking element prevents any unwanted airflow from passing through the pressure measuring orifice and potentially avoids unwanted noise.

[0025] The sealing element can also be in the measuring position, which is different from the rest position. As soon as the sealing element is no longer in the rest position, it is in at least one measuring position.

[0026] The sealing element can also serve to maintain the sealing device in a predetermined position for which a known calculation allows the flow rate to be determined from the measured pressure difference. The sealing element is then in the measurement position.

[0027] For example, in the measuring position, the sealing element blocks at least one sealing device in a determined position.

[0028] The ventilation opening is inventive in that the sealing element is permanently fixed to the ventilation opening. "Permanently fixed" means that the sealing element cannot be removed from the ventilation opening. The ventilation opening and the sealing element form a single, or monobloc, unit.

[0029] The sealing element is therefore mobile between the rest position and the measuring position without being able to be detached from the ventilation opening.

[0030] Thus, the sealing element cannot be lost.

[0031] The sealing element also includes at least one keying element configured to prevent the cover face from being fixed to the ventilation opening when the sealing element is in the measuring position.

[0032] The keying element ensures that the sealing element has not inadvertently remained in the measuring position while the ventilation outlet is in the operating position. In other words, the keying element ensures that the sealing device is not locked in a specific position and could cause the flow rate to vary.

[0033] The subject of this presentation may also exhibit one or more of the following characteristics The following risks taken alone or in combination.

[0034] In some embodiments, the sealing element is mobile in rotation or translation between at least one rest position and at least one measuring position.

[0035] In some embodiments, the plugging element is fixed on the functional face of the ventilation opening.

[0036] Thus the plugging element is easily accessible to a technician when the mouth is in the maintenance position.

[0037] In some embodiments, the sealing element includes at least one adjustment portion configured to come into contact with at least one adjustment member of at least one sealing device.

[0038] The shutter device comprises a flap portion positioned in the passage section, and an adjusting member that is integral with the flap portion. Thus, changing the position of the adjusting member results in a change in the position of the flap portion and therefore in the position of the shutter device. In other words, placing the shutter device in a specific position is equivalent to placing the adjusting member in a specific position.

[0039] In the measuring position, the sealing element includes an adjustment portion which is in contact with the adjusting element and locks the latter in a position Done.

[0040] In some embodiments, the adjustment portion is flat.

[0041] In some embodiments, the sealing element comprises at least two adjustment portions, each adjustment portion having a different thickness relative to the functional face.

[0042] Thus the sealing element allows the sealing device to be placed in at least two different determined positions.

[0043] The thickness of the adjustment portion is understood to be the distance between the functional face and a surface of the adjustment portion in contact with the adjustment member.

[0044] The adjustment portion allows the adjustment member to be positioned at a determined distance from the functional face, said distance being equal to the thickness of the adjustment portion.

[0045] In some embodiments, the plugging element in the measuring position allows the plugging device to be locked in a maximum opening position of the ventilation mouth.

[0046] In some embodiments, the ventilation opening further includes a first spring element configured to hold at least one shuttering device against at least one adjustment portion.

[0047] Thus the shutter device is pressed and held against the adjustment portion.

[0048] In some embodiments, at least one keying element forms an angle with the functional face within a first range of angle values.

[0049] Thus, the alignment element extends at a distance from the functional face and comes to rest against the cover face when the sealing element is in the measuring position. The alignment element does not touch the cover face in the rest position.

[0050] In some embodiments, the first range of angle value is between 60° and 120°, preferably between 80° and 100°, for example 90°.

[0051] In some embodiments, the ventilation outlet includes a flow control device configured to change the position of at least one shutter device according to an air humidity level or the detection of a pollutant.

[0052] Thus, the position of the shutter device varies with the humidity level of the air. The ventilation outlet is then called a humidity-controlled outlet.

[0053] The detection of the pollutant can be a detection of CO2.

[0054] In some embodiments, the flow control device includes an adjustment lever, said at least one sealing device being held against the adjustment lever by at least one second spring element.

[0055] The second spring element presses the shutter device against the adjusting lever so that when the mouth is in the operating position, the position of the shutter device is determined by the position of the adjusting lever.

[0056] In some embodiments, at least one first and at least one second spring element are combined.

[0057] Thus the mouth comprises a simple design.

[0058] The invention also relates to a ventilation installation for a building comprising a ventilation outlet according to the invention. Brief description of the drawings

[0059] The invention will be better understood from the following description, which relates to an embodiment according to the present invention, given by way of non-limiting example and explained with reference to the accompanying schematic drawings, in which:

[0060] [Fig-1] is a schematic representation of a ventilation outlet according to the invention in which a sealing element is in a rest position;

[0061] [Fig.2] is a schematic representation of the ventilation opening of [Fig. 1] in which the plugging element is in the measuring position;

[0062] [Fig.3] is a representation of the ventilation outlet in the operating position. Description of the implementation methods

[0063] Only the elements necessary for understanding the invention have been represented. To make the drawings easier to read, the same elements carry the same references from one figure to another.

[0064] The invention relates to a variable flow ventilation outlet 1 which can be an air extraction outlet configured to extract internal air from rooms, or an air supply outlet configured to supply air from outside to compensate for this extraction. The ventilation outlet 1 is part of a ventilation system for a building.

[0065] The ventilation outlet 1 includes an operating position, illustrated in [Fig.3], and a maintenance position in which a technician intervenes on the outlet 1 in order, for example, to check its operation.

[0066] The ventilation outlet 1 includes an airflow passage section 2 and at least one shutter device 3 configured to modify said airflow passage section 2. The shutter device 3 thus allows the airflow passage section 2 to be modified, i.e., varied. The shutter device 3 is therefore movable between several positions that affect the airflow. The shutter device 3 includes a damper portion 32 positioned in the passage section 2 and an adjustment member 31 that is integral with the damper portion 32. Thus, changing the position of the adjustment member 31 results in a change in the position of the damper portion 32 and therefore in the position of the shutter device 3. In other words, placing the shutter device 3 in a specific position is equivalent to placing the adjustment member 31 in a specific position.

[0067] In certain embodiments, the ventilation outlet 1 includes a flow control device 4 configured to modify the position of at least one shutter device 3 according to the air humidity level or the detection of a pollutant. Thus, the position of the shutter device 3 varies with the air humidity level or according to the concentration of a pollutant such as CO2.

[0068] In some embodiments, the flow control device 4 includes an adjustment lever 41, said at least one shut-off device 3 being held against the adjustment lever 41 by at least one second spring element 42.

[0069] The second spring element 42 presses the shutter device 3 against the adjustment lever 41 so that when the mouth 1 is in the operating position, the position of the shutter device 3 is determined by the position of the adjustment lever 4L

[0070] The ventilation opening 1 includes at least one cover face 5 configured to be fixed to a functional face 6 of the ventilation opening 1,

[0071] The cover face 5 is an aesthetic face. It conceals the functional face 6 of the ventilation outlet 1 when the ventilation outlet 1 is in the operating position as illustrated in [Fig. 3]. The cover face 5 is removed from the functional face 6 in the maintenance position which is illustrated in figures 1 and 2. The cover face 5 is assembled detachably or removablely on the functional face 6.

[0072] The ventilation outlet 1 includes at least one pressure measuring device 7 comprising a pressure measuring orifice 74 configured to allow measurement of air pressure downstream of the ventilation outlet 1, and a plugging element 71 movable between at least one rest position, illustrated in [Fig. 1], in which the plugging element 71 plugs the pressure measuring orifice 74, and at least one measuring position, illustrated in [Fig. 2], different from the rest position. For example, in the measuring position, the plugging element 71 blocks at least one sealing device 3 in a predetermined position.

[0073] The pressure measuring device 7 is used in the maintenance position of the ventilation outlet 1 during, for example, the commissioning of the outlet 1. Indeed, during commissioning, a check of the flow rate passing through the outlet 1 is performed. For this purpose, it is measured that the pressure difference between the air inlet and the air outlet of the ventilation outlet is within a nominal operating range. In other words, the air pressure difference between the upstream and downstream sides of the outlet is measured, the upstream and downstream sides being defined with respect to a direction of the ventilation outlet 1. The upstream side of the outlet is opposite the cover face 5, and the downstream side is opposite the cover face 5.

[0074] To facilitate pressure measurement downstream of the ventilation outlet 2, the pressure measuring device 7 includes a pressure measuring orifice 74. The pressure measuring orifice 74 allows, via a measuring device independent of the ventilation outlet 1, the pressure downstream of the outlet 1 to be measured in a ventilation circuit to which the outlet 1 is connected.

[0075] The measuring orifice 74 is blocked, in the operating position, by the blocking element 71. The blocking element 71 is then in the rest position. Thus, the blocking element 71 prevents any unwanted airflow from passing through the pressure measuring orifice 74 and potentially avoids unwanted noise.

[0076] The sealing element 71 also serves to maintain the sealing device 3 in a specific position for which a known calculation allows the flow rate to be determined from the measured pressure difference. The sealing element 71 is then in the measurement position.

[0077] The sealing element 71 is fixed permanently to a functional face 6 of the ventilation opening 1. "Fixed permanently" means that the sealing element 71 cannot be removed from the ventilation opening 1, and more specifically from the functional face 6. The ventilation opening 1 and the sealing element 71 form a single unit, or monobloc. Thus, the sealing element 71 is fixed accessed by a technician when the mouth 1 is in the maintenance position as illustrated in figures 1 and 2.

[0078] The sealing element 71 is therefore mobile between the rest position and the measuring position without being able to be detached from the ventilation mouth 1.

[0079] Thus, the sealing element cannot be lost.

[0080] The sealing element 71 is either in the rest position or in the measuring position. The sealing element 71 cannot be in an intermediate position. In other words, as soon as the sealing element 71 is no longer in the rest position, it is in at least one measuring position.

[0081] In some embodiments, the sealing element 71 is mobile in rotation, not shown, or in translation as in figures 1 and 2 between at least one rest position and at least one measuring position.

[0082] In some embodiments, the sealing element 71 includes at least one adjustment portion 73 configured to come into contact with the adjustment member 31 of the sealing device 3. In some embodiments, the adjustment portion 73 is flat.

[0083] In the measuring position, the adjustment portion 73 is in contact with the adjustment member 31 and locks the latter 31 in a determined position.

[0084] As illustrated in Figures 1 and 2, the plugging element 71 comprises five adjustment portions 73, each adjustment portion 73 having a different thickness relative to the functional face 6.

[0085] Thus the sealing element 71 allows the sealing device 3 to be placed in at least five different determined positions.

[0086] The thickness of the adjustment portion 73 is understood to be the distance between the functional face 6 and a surface of the adjustment portion 73 in contact with the adjustment member 31.

[0087] The adjustment portion 73 allows the adjustment member 31 to be positioned at a determined distance from the functional face 6, said distance being equal to the thickness of the adjustment portion 73.

[0088] In some embodiments, the plugging element 71 in the measuring position allows the plugging device 3 to be locked in a maximum opening position of the ventilation mouth 1.

[0089] In some embodiments, the ventilation opening 1 further includes a first spring element 33 configured to hold the shutter device 3 against the adjustment portion 73. Thus the shutter device 3 is pressed and held against the adjustment portion 73.

[0090] The plugging element 71 also includes at least one keying element 72 configured to prevent the attachment of the cover face 5 to the ventilation opening 1 when the sealing element 71 is in the measuring position.

[0091] The keying element 72 ensures that the sealing element 71 has not inadvertently remained in the measuring position while the ventilation outlet 1 is in the operating position. In other words, the keying element 72 ensures that the sealing device 3 is not blocked in a specific position and can vary the flow rate.

[0092] In certain embodiments, the alignment element 72 forms an angle with the functional face 6 within a first range of angle values ​​between 60° and 120°, preferably between 80° and 100°, for example 90°. Thus, the alignment element 72 extends away from the functional face 6 and comes to rest against the cover face 5 when the plugging element 71 is in the measuring position. The alignment element 72 does not touch the cover face 5 in the rest position.

[0093] Although the present invention has been described with reference to specific embodiments, it is evident that modifications and changes can be made to these examples without departing from the general scope of the invention as defined by the claims. In particular, individual features of the various embodiments illustrated / mentioned can be combined in additional embodiments. Therefore, the description and drawings should be considered in an illustrative rather than a restrictive sense.

[0094] It is also evident that all the characteristics described with reference to a process are transposable, alone or in combination, to a device, and conversely, all the characteristics described with reference to a device are transposable, alone or in combination, to a process.

Claims

Demands

1. Variable flow ventilation outlet (1) comprising an airflow passage section (2), at least one shut-off device (3) configured to modify said airflow passage section (2), at least one cover face (5) configured to be fixed to a functional face (6) of the ventilation outlet (1), and at least one pressure measuring device (7) comprising a pressure measuring orifice (74) configured to allow measurement of air pressure downstream of the ventilation outlet (1) and a plugging element (71) movable between at least one rest position in which the plugging element (71) plugs the pressure measuring orifice (74) and at least one measurement position other than the at least one rest position,characterized in that the sealing element (71) is fixed permanently to the ventilation opening (1) and comprises at least one keying element (72) configured to prevent the attachment of at least one cover face (5) to the ventilation opening (1) when the sealing element (71) is in at least one measuring position.

2. Ventilation outlet (1) according to claim 1, wherein the plugging element (71) is movable in rotation or translation between at least one rest position and at least one measuring position.

3. Ventilation outlet (1) according to any one of the preceding claims, wherein the plugging element (71) is fixed to the functional face (6) of the ventilation outlet (1).

4. Ventilation outlet (1) according to any one of the preceding claims, wherein the plugging element (71) comprises at least one adjusting portion (73) configured to come into contact with at least one adjusting member (31) of the at least one sealing device (3).

5. Ventilation outlet (1) according to claim 4, wherein the plugging element (71) comprises at least two adjustment portions (73), each adjustment portion (73) having a different thickness relative to the functional face (6).

6. Ventilation outlet (1) according to any one of claims 4 or 5, further comprising a first spring element (33) configured to hold at least one shuttering device (3) against at least one adjustment portion (73).

7. Ventilation outlet (1) according to any one of the preceding claims preceding, in which at least one keying element (72) forms an angle with the functional face (6) included in a first range of angle values.

8. Ventilation outlet (1) according to any one of the preceding claims, comprising a flow control device (4) configured to change the position of at least one shutter device (3) as a function of an air humidity level or the detection of a pollutant.

9. Ventilation outlet according to claim 8, wherein the flow control device (4) comprises an adjustment lever (41), said at least one shuttering device (3) being held against the adjustment lever (41) by at least one second spring element (42).

10. Ventilation mouth (1) according to claim 9, wherein at least one first (33) and at least one second spring element (42) are coincident.

11. Ventilation installation for a building comprising a ventilation outlet (1) according to any one of the preceding claims.