Variable flow ventilation outlet with a sealing element

Abstract

A variable flow ventilation outlet (1) comprising a closure device (3) configured to modify a passage section (2) of an air flow, a cover face (5) configured to be fixed to the ventilation outlet (1), and a pressure measuring device (7) comprising a pressure measuring orifice (74) and a plugging element (71) movable between a rest position in which the plugging element (71) blocks the pressure measuring orifice (74) and a measuring position in which the plugging element (71) blocks the closure device (3) in a determined position, the plugging element (71) being fixed integrally to the ventilation outlet (1) and comprising a foolproof element (72) preventing the cover face (5) from being fixed to the ventilation outlet (1) when the plugging element (71) is in the measuring position. Figure 1

Description

Title of the invention: Variable flow ventilation outlet equipped with a blocking element Technical field

[0001] The invention relates to the field of ventilation installations for a building and more particularly to a ventilation outlet and a ventilation installation comprising such an outlet. State of the prior art

[0002] Buildings, including homes, schools or offices, may 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 in these rooms.

[0003] The main objective of renewing the air in rooms, also called ventilation, is to evacuate air pollutants linked to the presence of occupants, the presence of equipment or machines used in these rooms, as well as to evacuate pollutants emitted by the building itself. Air pollutants are in particular carbon dioxide CO2, humidity (i.e. water) and volatile organic compounds called "VOCs".

[0004] In particular, since a person breathes a volume of air of approximately 12m3 during the day, it is important, for reasons of hygiene and comfort, to renew the air in rooms, particularly 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 flow rate of air renewal, in order to limit heat losses due to the evacuation of interior air, particularly when it is heated in winter.

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

[0008] In order to optimize the ventilation of rooms according to parameters such as the humidity level, it is known to produce variable flow air extraction or insufflation systems, i.e. variable flow air extraction or insufflation systems which comprise at least one air extraction or insufflation vent, hereinafter called a ventilation vent, comprising an air flow passage section and at least one closure device configured to modify, for example by depending on the air humidity level, said air flow 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 outlet, 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 that the installation is operating correctly, it is necessary to check the pressure difference between the air inlet and the air outlet of the ventilation opening, particularly when the installation is put into operation.

[0011] There is a known solution for a variable flow ventilation outlet comprising a pressure measuring device provided with a measuring orifice making it possible to measure the air pressure at the outlet of the ventilation outlet.

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

[0013] Furthermore, this pressure measuring orifice is removably closed by a plug to prevent a parasitic air flow from passing through the pressure measuring orifice. During a pressure measurement, the plug is removed from the pressure measuring orifice and then positioned at a regulation module to block the closure device in the closed position, the regulation module being positioned on the functional face. Thus, the passage section of the variable flow ventilation outlet is known during the pressure measurement and it is thus possible to refer to a chart to determine the value of the associated flow rate.

[0014] This variable flow ventilation outlet allows reliable measurement of the air pressure at the outlet of the ventilation outlet. However, after the measurement, when the variable flow ventilation outlet is put into operation, the cap may be left positioned at the regulation module. Thus, the ventilation outlet is blocked in the closed position without this being visible to a user since the cover face has the function of hiding this part. In other words, the ventilation achieved in the building is not as expected.

[0015] Furthermore, it is possible that the cap is lost when removing the latter from the regulation module. Thus, the pressure measuring orifice is not closed during operation of the ventilation outlet and a parasitic air flow may be created, leading to an increase in the ventilation flow and potentially parasitic noise.

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

[0017] One embodiment relates to a variable flow ventilation outlet comprising a passage section for an air flow, at least one closure device configured to modify said passage section for the air flow, 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 enable an air pressure to be measured downstream of the ventilation outlet and a blocking element movable between at least one rest position in which the blocking element blocks the pressure measuring orifice and at least one measurement position different from the at least one rest position,characterized in that the plugging element is fixedly attached to the ventilation opening and that it comprises at least one foolproof element configured to prevent the at least one cover face from being fixed to the ventilation opening when the plugging element is in the at least one measuring position.

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

[0019] The ventilation outlet comprises an operating position, and a maintenance position, different from the operating position, in which an intervention by a technician is carried out on the outlet in order, for example, to check its operation.

[0020] The variable flow ventilation outlet comprises a shut-off device which makes it possible to modify, i.e. vary, the passage section of the air flow. The shut-off device is therefore movable between several positions which influence the air flow.

[0021] The cover face is a face that has an aesthetic function. It allows the functional face of the ventilation outlet to be hidden when the ventilation outlet is in the operating position. The cover face is removed from the functional face in the maintenance position. The cover face is assembled in a removable or removably manner on the functional face.

[0022] The pressure measuring device is used in the maintenance position of the ventilation outlet during commissioning of the outlet, for example. Indeed, during commissioning, a check of the flow rate passing through the outlet is carried out. For this, 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 sides 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] In order to facilitate the measurement of pressure downstream of the ventilation outlet, the pressure measuring device comprises a pressure measuring orifice. The pressure measuring orifice makes it possible, by means of a measuring device, independent of the ventilation outlet, to measure the pressure downstream of the outlet in a ventilation circuit.

[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 a parasitic air flow from passing through the pressure measuring orifice and potentially prevents parasitic noise.

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

[0026] The plugging element may also have the function of maintaining the closure device in a determined position for which a known calculation makes it possible to determine the flow rate from the measured pressure difference. The plugging element is then in the measuring position.

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

[0028] The ventilation opening is inventive in that the plugging element is fixedly attached to the ventilation opening. By "fixedly" is meant that the plugging element cannot be removed from the ventilation opening. The ventilation opening and the plugging element form a unitary, or monobloc, assembly.

[0029] The plugging element is therefore movable between the rest position and the measuring position without being able to be detached from the ventilation outlet.

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

[0031] The plugging element also comprises at least one foolproofing element configured to prevent the fixing of the cover face on the ventilation opening when the plugging element is in the measuring position.

[0032] The foolproof element makes it possible to ensure that the plugging element has not inadvertently remained in the measuring position while the ventilation opening is in the operating position. In other words, the foolproof element makes it possible to ensure that the closure device is not blocked in a determined position and can vary the flow rate.

[0033] The subject matter of this disclosure may also have one or more of the charac- following characteristics taken alone or in combination.

[0034] In certain embodiments, the stopper element is movable in rotation or in translation between the at least one rest position and the at least one measuring position.

[0035] In some embodiments, the plugging element is attached to 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 plugging element comprises at least one adjustment portion configured to come into contact with at least one adjustment member of the at least one closure device.

[0038] The closure device comprises a shutter portion positioned in the passage section, and an adjustment member which is integral with the shutter portion. Thus, a modification of a position of the adjustment member causes a modification of a position of the shutter portion and therefore of the position of the closure device. In other words, putting the closure device in a determined position amounts to saying putting the adjustment member in a determined position.

[0039] In the measuring position, the plugging element comprises an adjustment portion which is in contact with the adjustment member and locks the latter in a position finished.

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

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

[0042] Thus the plugging element makes it possible to place the closure device in at least two different determined positions.

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

[0044] The adjustment portion makes it possible to position the adjustment member at a determined distance from the functional face, said distance being equal to the thickness of the adjustment portion.

[0045] In certain embodiments, the plugging element in the measurement position makes it possible to block the plugging device in a position of maximum opening of the ventilation outlet.

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

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

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

[0049] Thus the polarizing element extends at a distance from the functional face and comes into abutment with the cover face when the plugging element is in the measuring position. The polarizing element does not touch the cover face in the rest position.

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

[0051] In some embodiments, the ventilation outlet comprises a flow rate adjustment device configured to modify the position of the at least one closure device depending on an air humidity level or a detection of a pollutant.

[0052] Thus the position of the shutter device varies with the humidity level of the air. The ventilation vent is then called a hygro-adjustable vent.

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

[0054] In some embodiments, the flow rate adjustment device comprises an adjustment lever, the at least one closure 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 adjustment lever so that when the mouth is in the operating position, the position of the shutter device is determined by the position of the adjustment lever.

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

[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, thanks to 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 appended schematic drawings, in which:

[0060] [Fig-1] is a schematic representation of a ventilation outlet according to the invention in which a stopper element is in the 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 embodiments

[0063] Only the elements necessary for understanding the invention have been represented. To facilitate reading of the drawings, the same elements bear the same references from one figure to another.

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

[0065] The ventilation outlet 1 comprises an operating position, illustrated in [Fig.3], and a maintenance position in which an intervention by a technician is carried out on the outlet 1 in order, for example, to check its operation.

[0066] The ventilation outlet 1 comprises a passage section 2 for the air flow, and at least one closure device 3 configured to modify said passage section 2 for the air flow. The closure device 3 therefore makes it possible to modify, i.e. vary, the passage section 2 for the air flow. The closure device 3 is therefore movable between several positions which influence the air flow. The closure device 3 comprises a flap part 32 positioned in the passage section 2, and an adjustment member 31 which is integral with the flap part 32. Thus, a modification of a position of the adjustment member 31 causes a modification of a position of the flap part 32 and therefore of the position of the closure device 3. In other words, putting the closure device 3 in a determined position amounts to saying putting the adjustment member 31 in a determined position.

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

[0068] In some embodiments, the flow rate adjustment device 4 comprises an adjustment lever 41, said at least one closure 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 closure device 3 against the adjustment lever 41 so that when the mouth 1 is in the operating position, the position of the closure device 3 is determined by the position of the adjustment lever 4L

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

[0071] The cover face 5 is a face which has an aesthetic function. It makes it possible to hide 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 in a removable or removable manner on the functional face 6.

[0072] The ventilation outlet 1 comprises at least one pressure measuring device 7 comprising a pressure measuring orifice 74 configured to allow an air pressure to be measured downstream of the ventilation outlet 1, and a blocking element 71 movable between at least one rest position, illustrated in [Fig.l], in which the blocking element 71 blocks the pressure measuring orifice 74 and at least one measurement position, illustrated in [Fig.2], different from the rest position. For example, in the measurement position, the blocking element 71 blocks the at least one closure device 3 in a determined position.

[0073] The pressure measuring device 7 is used in the maintenance position of the ventilation outlet 1 during commissioning of the outlet 1, for example. Indeed, during commissioning, a check of the flow rate passing through the outlet 1 is carried out. For this, 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 difference in air pressure between the upstream and downstream of the outlet is measured, the upstream and downstream being defined relative to a direction of the ventilation outlet 1. The upstream of the outlet is opposite the cover face 5, and the downstream is opposite the cover face 5.

[0074] In order to facilitate the measurement of pressure downstream of the ventilation outlet 2, the pressure measuring device 7 comprises a pressure measuring orifice 74. The pressure measuring orifice 74 makes it possible, by means of a measuring device, independent of the ventilation outlet 1, to measure the pressure downstream of the outlet 1 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 a parasitic air flow from passing through the pressure measuring orifice 74 and potentially prevents parasitic noise.

[0076] The plugging element 71 also has the function of maintaining the closure device 3 in a determined position for which a known calculation makes it possible to determine the flow rate from the measured pressure difference. The plugging element 71 is then in the measuring position.

[0077] The plugging element 71 is fixed integrally to a functional face 6 of the ventilation outlet 1. By "integrally" is meant that the plugging element 71 cannot be removed from the ventilation outlet 1, and more particularly from the functional face 6. The ventilation outlet 1 and the plugging element 71 form a unitary assembly, or monobloc. Thus the plugging element 71 is fa easily accessible to a technician when the mouth 1 is in the maintenance position as illustrated in figures 1 and 2.

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

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

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

[0081] In certain embodiments, the plugging element 71 is movable in rotation, not shown, or in translation as in FIGS. 1 and 2 between the at least one rest position and the at least one measuring position.

[0082] In certain embodiments, the plugging element 71 comprises at least one adjustment portion 73 configured to come into contact with the adjustment member 31 of the closure device 3. In certain embodiments, the adjustment portion 73 is planar.

[0083] In the measuring position, the adjustment portion 73 is in contact with the adjustment member 31 and blocks 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 plugging element 71 makes it possible to place the closure device 3 in at least five different determined positions.

[0086] The thickness of the adjustment portion 73 is understood to mean 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 makes it possible to position the adjustment member 31 at a determined distance from the functional face 6, said distance being equal to the thickness of the adjustment portion 73.

[0088] In certain embodiments, the blocking element 71 in the measurement position makes it possible to block the closing device 3 in a position of maximum opening of the ventilation opening 1.

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

[0090] The plugging element 71 also comprises at least one foolproof element 72 configured to prevent the fixing of the cover face 5 on the ventilation opening 1. when the plugging element 71 is in the measuring position.

[0091] The foolproof element 72 makes it possible to ensure that the plugging element 71 has not inadvertently remained in the measuring position while the ventilation opening 1 is in the operating position. In other words, the foolproof element 72 makes it possible to ensure that the closure device 3 is not blocked in a determined position and can vary the flow rate.

[0092] In certain embodiments, the polarizing element 72 forms an angle with the functional face 6 comprised in a first angle value range comprised between 60° and 120°, preferably between 80° and 100°, for example 90°. Thus the polarizing element 72 extends at a distance from the functional face 6 and comes into abutment with the cover face 5 when the plugging element 71 is in the measuring position. The polarizing 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 obvious that modifications and changes may 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 illustrated / mentioned embodiments may be combined in additional embodiments. Therefore, the description and drawings should be considered in an illustrative rather than restrictive sense.

[0094] It is also obvious that all the characteristics described with reference to a method 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 method.

Claims

Claims

1. A variable flow ventilation outlet (1) comprising a passage section (2) for an air flow, at least one closure device (3) configured to modify said passage section (2) of the air flow, 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 enable an air pressure to be measured 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 different from the at least one rest position,characterized in that the plugging element (71) is fixedly attached to the ventilation opening (1) and that it comprises at least one foolproof element (72) configured to prevent the at least one cover face (5) from being fixed to the ventilation opening (1) when the plugging element (71) is in the at least one measuring position.,

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

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

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

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

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

7. A ventilation outlet (1) according to any one of the preceding claims preceding, in which the at least one foolproof 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 adjustment device (4) configured to modify the position of the at least one closure device (3) as a function of an air humidity level or a detection of a pollutant.

9. Ventilation outlet according to claim 8, wherein the flow rate adjustment device (4) comprises an adjustment lever (41), said at least one closure 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, in which the at least one first (33) and the at least one second spring element (42) are merged.

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

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