Variable-flow air vent with closing 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.

Description

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, can accommodate people. They generally have 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 room air renewal, also called ventilation, is to remove air pollutants linked to the presence of occupants, the presence of equipment or machinery used in these rooms, as well as to remove 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 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 flow rate, in order to limit heat loss 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 rooms, and an air supply system configured to blow in air from outside 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, subsequently called a ventilation vent, comprising an air flow passage section and at least one closing device configured to modify, for example according to an 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. 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 outlet, particularly when the installation is put into operation.

[0010] There is a known solution for a variable flow ventilation outlet comprising a pressure measuring device equipped with a measuring orifice for measuring the air pressure at the outlet of the ventilation outlet.

[0011] The pressure measuring orifice is positioned on an operative face of the ventilation outlet. More specifically, 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 operative position.

[0012] In addition, this pressure measuring orifice is removably closed by a plug to prevent an unwanted 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.

[0013] This variable flow ventilation outlet allows for 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 control module. Thus, the ventilation outlet is blocked in the closed position without this being visible to a user since the cover face is intended to hide this part. In other words, the ventilation achieved in the building is not as expected.

[0014] Additionally, the cap may be lost when removing it from the control module. This means that the pressure measuring port is not sealed when the ventilation outlet is in operation, and a parasitic airflow may be created, resulting in an increase in the ventilation flow rate and potentially parasitic noise.

[0015] There is therefore a need for a pressure measuring port cap that overcomes the disadvantages listed above. Statement of the invention

[0016] 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 of 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 allow 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 foolproofing 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.,

[0017] The variable flow ventilation outlet can be an air extraction outlet configured to extract internal air from rooms, or an air supply outlet configured to blow air from outside to compensate for this extraction.

[0018] 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.

[0019] The variable flow ventilation outlet includes a shut-off device that allows the air flow passage section to be modified, i.e. varied. The shut-off device is therefore movable between several positions that influence the air flow.

[0020] 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 detachable manner on the functional face.

[0021] 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. To do 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. The upstream of the outlet is opposite the cover face, and the downstream is opposite the cover face.

[0022] In order to facilitate the measurement of pressure downstream of the ventilation outlet, the pressure measuring device comprises a pressure measuring port. The pressure measuring port makes it possible, via a measuring device, independent of the ventilation outlet, to measure the pressure downstream of the outlet in a ventilation circuit.

[0023] 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 an unwanted air flow from passing through the pressure measuring orifice and potentially avoids unwanted noise.

[0024] 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.

[0025] The plugging element may also have the function of maintaining the closure device in a specific 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.

[0026] For example, in the measuring position, the plugging element blocks the at least one closure device in a determined position.

[0027] The ventilation outlet is inventive in that the plugging element is fixedly attached to the ventilation outlet. By "fixedly" is meant that the plugging element cannot be removed from the ventilation outlet. The ventilation outlet and the plugging element form a unitary, or monobloc, assembly.

[0028] The sealing element is therefore movable between the rest position and the measuring position without being able to be detached from the ventilation outlet.

[0029] This way, the sealing element cannot be lost.

[0030] The plugging element also comprises at least one keying element configured to prevent the fixing of the cover face on the ventilation opening when the plugging element is in the measuring position.

[0031] The polarizing 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 polarizing element ensures that the sealing device is not blocked in a specific position and can vary the flow rate.

[0032] The subject matter of this disclosure may also exhibit one or more of the following characteristics, taken alone or in combination.

[0033] In some embodiments, the plugging element is movable in rotation or translation between the at least one rest position and the at least one measuring position.

[0034] In some embodiments, the plugging element is attached to the operative face of the ventilation opening.

[0035] This makes the plugging element easily accessible to a technician when the mouth is in the maintenance position.

[0036] 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.

[0037] 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. 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 determined position.

[0038] In some embodiments, the adjustment portion is planar.

[0039] In some embodiments, the plugging element comprises at least two adjustment portions, each adjustment portion having a different thickness relative to the functional face.

[0040] Thus the plugging element allows the closure device to be placed in at least two different determined positions.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] In some embodiments, the vent further includes a first spring member configured to hold the at least one closure device against the at least one adjustment portion.

[0045] Thus the shutter device is pressed and held against the adjustment portion.

[0046] In some embodiments, the at least one keying element forms an angle with the functional face within a first angle value range.

[0047] Thus the polarizing element extends away from the functional face and comes into contact 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.

[0048] In some embodiments, the first angle value range is between 60° and 120°, preferably between 80° and 100°, for example 90°.

[0049] In some embodiments, the ventilation outlet includes a flow control device configured to change the position of the at least one shutter device based on an air humidity level or a detection of a pollutant.

[0050] The position of the shutter device therefore varies with the humidity level in the air. The ventilation outlet is then called a humidity-controlled outlet.

[0051] Pollutant detection can be CO2 detection.

[0052] In some embodiments, the flow rate adjustment device comprises an adjustment lever, the at least one shutter device being held against the adjustment lever by at least one second spring element.

[0053] 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.

[0054] In some embodiments, the at least one first and at least one second spring element are merged.

[0055] So the mouth includes a simple design.

[0056] The invention also relates to a ventilation installation for a building comprising a ventilation outlet according to the invention. Brief description of the drawings

[0057] The invention will be better understood from the following description, which relates to an embodiment according to the present invention, given as a non-limiting example and explained with reference to the appended schematic drawings, in which: [ FIG. 1] is a schematic representation of a ventilation outlet according to the invention in which a blocking element is in the rest position; [ FIG. 2 ] is a schematic representation of the ventilation opening of the figure 1 in which the stopper element is in the measuring position; [ FIG. 3 ] is a representation of the ventilation outlet in operating position. Description of the embodiments

[0058] Only the elements necessary for understanding the invention have been shown. To facilitate reading of the drawings, the same elements bear the same references from one figure to another.

[0059] 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. The ventilation outlet 1 comprises an operating position, illustrated in figure 3 , and a maintenance position in which a technician intervenes on the mouth 1 in order, for example, to check its operation.

[0060] 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 portion 32 positioned in the passage section 2, and an adjustment member 31 which is integral with the flap portion 32. Thus, a modification of a position of the adjustment member 31 results in a modification of a position of the flap portion 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.

[0061] In some 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.

[0062] 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.

[0063] 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 41.

[0064] 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,

[0065] 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 figure 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 removably manner on the functional face 6.

[0066] 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 figure 1 , in which the plugging element 71 plugs the pressure measuring orifice 74 and at least one measuring position, illustrated in figure 2 , different from the rest position. For example, in the measuring position, the plugging element 71 blocks the at least one closing device 3 in a determined position.

[0067] 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.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] 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 easily accessible to a technician when the outlet 1 is in the maintenance position as illustrated in figures 1 And 2 .

[0072] The plugging element 71 is therefore movable between the rest position and the measuring position without being able to be detached from the ventilation opening 1.

[0073] This way, the sealing element cannot be lost.

[0074] The plugging element 71 is either in the rest position or in the measuring position.

[0075] The stopper element 71 cannot be in an intermediate position. In other words, as soon as the stopper element 71 is no longer in the rest position, it is in at least one measuring position.

[0076] In certain embodiments, the plugging element 71 is movable in rotation, not shown, or in translation as in the figures 1 And 2 between the at least one rest position and the at least one measuring position.

[0077] 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.

[0078] 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.

[0079] 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.

[0080] Thus the plugging element 71 makes it possible to place the closure device 3 in at least five different determined positions.

[0081] 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.

[0082] 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. In certain embodiments, the blocking element 71 in the measurement position makes it possible to block the closure device 3 in a position of maximum opening of the ventilation opening 1.

[0083] 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.

[0084] 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.

[0085] 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.

[0086] 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.

[0087] 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.

[0088] 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

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 thatthe 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 attachment of the at least one cover face (5) on 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, in which 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 blocking 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. 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. Ventilation outlet (1) according to any one of the preceding claims, in which the at least one foolproof element (72) forms an angle with the functional face (6) within a first angle value range.

8. Ventilation outlet (1) according to any one of the preceding claims, comprising a flow rate 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 outlet (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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