Air inlet and ventilation system including such an air inlet

Abstract

An air inlet and ventilation system comprising such an air inlet. This air inlet (30) provides a first duct (40) configured to guide a first airflow (F40) from outside a building into an interior volume of the building, the first airflow (F40) exiting the first duct into the interior volume through a supply vent (42) of the first duct. The air inlet (30) also provides a second duct (100), which includes an inlet vent (102) and an outlet vent (104), each opening into the interior volume of the building, and includes a motor (106) configured to move a second airflow (F100) between the inlet vent (102) and the outlet vent (104).The first and second ducts are arranged so that when the first airflow (F40) and the second airflow (F100) circulate in their respective ducts, the first airflow exchanges heat with the second airflow. See Figure 2 for abbreviations.

Description

Title of the invention: Air inlet vent and ventilation installation comprising such an air inlet vent

[0001] The invention relates to an air inlet vent, as well as a ventilation installation comprising such an air inlet vent.

[0002] A building, in particular a building accommodating people such as a residential building comprising accommodation, is generally equipped with a ventilation system to evacuate indoor pollutants generated in the accommodation and which are detrimental to the comfort and / or health of the occupants. Indoor pollutants are, for example, humidity, CO2, volatile organic compounds - also known as VOCs -, fine particles - also known as PM, an acronym for Particulate Matter in English -, etc. A ventilation system generally comprises a mechanical device, for example a fan, to generate air flows in the building: this is then referred to as a controlled mechanical ventilation system, or simply "CMV".

[0003] We are particularly interested here in so-called "single-flow" ventilation installations, also simply called "single-flow CMV". A single-flow CMV comprises at least one air inlet vent, also simply called "air inlet", each air inlet vent being arranged in living areas such as bedrooms and the living room to allow fresh air to enter from outside. The air inlet vents are generally positioned either at the level of the frames, for example on windows or doors or roller shutter boxes, or at the level of the masonry, through the walls.

[0004] The single-flow CMV also includes at least one air extraction vent, each extraction vent being arranged in a so-called "technical" room of the dwelling, such as the kitchen, toilets or bathroom, where the indoor pollutants are mainly generated. The mechanical device sucks in the stale air, loaded with indoor pollutants, through the extraction vents and discharges this stale air outside the dwelling. The suction of the stale air creates a depression in the dwelling and brings in fresh air through the air inlet vents.

[0005] Outside air generally includes atmospheric pollutants, also called "external pollutants", for example dust, pollen, fine or ultrafine particles generated by car traffic, etc. To prevent outside pollutants from entering the home, it is known to equip the air intake vents with a filtration device.

[0006] Document FR3104034 describes, for example, an air inlet mouth comprising a sleeve received in a wall passage. The sleeve houses an electrostatic precipitator, configured to capture pollutants carried by the flow of outside air entering the dwelling.

[0007] However, in winter, the outside air entering through the air inlet vents is cold, which creates a feeling of discomfort for the occupants of the dwelling. It is known to heat this air using an electrical resistance, which results in significant energy costs and is therefore not desirable. Known air inlet vents do not address this problem.

[0008] It is these problems that the invention more particularly intends to remedy, by proposing an air inlet mouth offering improved comfort.

[0009] For this purpose, the invention relates to an air inlet vent, which is configured to be mounted on a wall of a building, the air inlet vent comprising a housing, which provides a first duct configured to guide a first air flow from the exterior of the building to an interior volume of the building in the mounted configuration of the air inlet vent, the first duct comprising an intake vent, through which the first air flow enters, and an insufflation vent, which opens into the interior volume of the building and from which the first air flow exits.

[0010] According to the invention: - the box also provides a second duct, which includes an inlet vent and an outlet vent, the inlet and outlet vents each opening into the interior volume of the building in the assembled configuration of the air inlet vent, - the air inlet vent comprises a motor member, configured to move a second air flow between the inlet vent and the outlet vent, and an electronic card, configured to control the motor member, and - the first duct and the second duct are arranged so that when the first air flow circulates in the first duct and when the second air flow circulates in the second duct, the first air flow exchanges heat with the second air flow.

[0011] Thanks to the invention, the first air flow, which circulates from the outside of the housing to the inside of the housing, and the second air flow, recycled within the housing, exchange heat within the air inlet, in other words the first air flow is tempered by the second air flow. This avoids feelings of discomfort linked to extreme temperatures, in particular a feeling of cold in winter.

[0012] According to advantageous but not obligatory aspects of the invention, such an air inlet vent may incorporate one or more of the following features taken in isolation or in any technically admissible combination: - The air inlet mouth further comprises a sensor, configured to measure the content of one or more indoor pollutants inside the building, while the electronic card is configured to start the motor unit when the indoor pollutant content, measured by the sensor, exceeds a predetermined value. - The sensor is configured to measure volatile organic compound content and / or fine particle content. - The air inlet vent includes an ionization device, which is configured to ionize the air in the interior volume of the building so as to reduce an interior pollutant content, while the ionization device is controlled by the electronic card. - A portion of the ionization device is configured to generate ions in the second duct when the second air stream flows through the second duct. - The air inlet mouth comprises a filtration device, which is configured to reduce a content of indoor pollutants contained in the second air flow when the motor member generates the second air flow. - The filtration device is housed in the second conduit, and includes: • an activated carbon filter, which is configured to reduce a content of volatile organic compounds in the second air flow when the motor member generates the second air flow, and / or • a fine particle filter, which is configured to reduce a fine particle content in the second air flow when the drive member generates the second air flow. - The air inlet mouth includes a filter, which is configured to reduce the content of external pollutants contained in the first air flow. - The inlet and outlet ports are arranged opposite each other, while the insufflation port adjoins the outlet port, so that the first air flow, coming out of the insufflation port, and the second air flow, coming out of the outlet port, mix with each other. - The first duct and the second duct are separated by a partition configured to exchange heat between the first air flow and the second air flow.

[0013] The invention also relates to a ventilation installation, comprising: - at least one air inlet vent as described above, each air inlet vent being fixed to a wall of the building so that the first air flow is a fresh air flow, and - an extraction device, configured to extract a flow of air extracted from inside the building and to generate, by depression in the volume inside the building, the first air flow.

[0014] The invention will be better understood, and other advantages thereof will appear more clearly in the light of the following description of an embodiment of an air inlet vent and of a ventilation installation, in accordance with its principle, given solely by way of example and with reference to the appended drawings, in which:

[0015] - [Fig.l] [Fig.l] is a schematic view of a ventilation installation in accordance with the invention, comprising an air inlet mouth also in accordance with the invention;

[0016] - [Fig.2] [Fig.2] represents, on two inserts a) and b), a perspective view of the air inlet mouth of [Fig.l], observed from two opposite directions;

[0017] - [Fig.3] [Fig.3] is a partially exploded perspective view of the mouth air inlet of [Fig.2], some elements being hidden, and

[0018] - [Fig.4] [Fig.4] represents respectively, on four inserts a), b), c) and d), a side view of the air inlet mouth of [Fig.l] and three sections, along three parallel planes, of this air inlet mouth.

[0019] A ventilation installation 10 is shown in [Fig.l]. The ventilation installation 10, also simply called “installation 10” in the context of the present description, is configured to ventilate a building 12. The building 12 is not part of the installation 10 but serves to specify its context and operation. The building 12 is, for example, a residential building, or even a house, or an office building.

[0020] The building 12 is here represented by two walls, including a first wall 14A and a second wall 14B, which are connected by a ceiling 14C and which together delimit an interior volume V12 of the building 12. The walls 14A and 14B are here assumed to be flat and vertical, the description being made with reference to the orientation of the various elements of the ventilation installation 10 as represented in the drawings, knowing that these elements may be oriented differently in reality.

[0021] When people occupy the building 12, the various activities of the occupants generate indoor pollutants, in particular humidity, CO2, or volatile organic compounds, also called VOCs. Fine particles or VOCs can also be released by the equipment of the building 12, or by paints, etc. These pollutants thus affect the quality of the air inside the building 12.

[0022] The first wall 14A, on the left of [Fig.l], is here an exterior wall, which separates the interior volume V12 from the exterior of the building 12. The air of the interior volume V12 is called “interior air”, or “stale air” when this interior air is loaded with interior pollutants, while the air from the exterior environment is called “exterior air”, the exterior air brought inside the building being called “fresh air”.

[0023] To prevent the accumulation of indoor pollutants in the interior volume V12, the ventilation installation 10 comprises an extraction device 20. The extraction device 20 is here installed on the second wall 14B. The extraction device 20 comprises an extraction duct 22. The extraction duct 22 opens, on the one hand, into the interior volume V12 via an extraction vent 24 and, on the other hand, outside the interior volume V12 via an exhaust vent 26. The exhaust vent 26 is preferably located outside the building 12.

[0024] In a variant not shown, the extraction duct 22 comprises branches and opens into the interior volume V12 via several extraction vents, and / or outside the interior volume V12 via several evacuation vents 26.

[0025] The extraction device 20 also comprises an extraction member 28, represented here by a fan housed in the extraction duct 22. When the extraction member 28 is in operation, the extraction device sucks in, through the extraction vent 24, an extracted air flow F22, this extracted air flow then being discharged through the discharge vent 26. Thus the extraction device 20 is configured to extract the extracted air flow F22 from the interior of the building 12.

[0026] When the extraction member 28 is in operation, the suction of the extracted air flow F22 through the extraction vent 24 generates, in the interior volume V12, a slight depression. The ventilation installation 10 comprises an air inlet vent 30, which is provided to allow outside air, free of interior pollutants, to enter the interior volume V12. The air inlet vent 30 is configured to be mounted on a wall of a building 12. The air inlet vent 30 is here mounted on the first wall 14A, in a mounted configuration of the air inlet vent 30.

[0027] In a variant not shown, the ventilation installation 10 comprises several air inlet vents of the type of the air inlet vent 30. More generally, the ventilation installation 10 comprises at least one air inlet vent 30. The air inlet vent(s) are generally arranged at a distance from the exhaust vents 24, so that the fresh air, entering through the air inlet vent(s) 30, circulates within the building 12 before being extracted by the extraction device 20.

[0028] The air inlet mouth 30 shown in Figures 2 to 4 is now detailed.

[0029] The air inlet mouth 30 comprises a housing 32, which here has a generally parallelepiped shape, and a sleeve 34, which here has a cylindrical shape and which is arranged projecting from one of the faces of the housing 32.

[0030] In the mounted configuration of the air inlet vent, the sleeve 34 passes through the first wall 14A, so that the housing 32 is positioned opposite the first wall 14A, on the side of the interior volume V12. The housing 32 comprises a rear face 35A, which is a face oriented towards the first wall 14A when the air inlet vent 30 is in the mounted configuration on the first wall 14A. The sleeve 34 here projects from the rear face 35A of the housing 32. The housing 32 also includes a front face 35B, which is opposite the rear face 35A. The front face 35B is therefore oriented towards the internal volume V12 when the air inlet vent 30 is in the mounted configuration. The rear face 35A and the front face 35B are connected to each other by four peripheral faces, which include a lower face 36A, an upper face 36B opposite the lower face 36A, and two side faces 36C and 36D which connect the lower face 36A to the upper face 36B. The lower face 36A is preferably oriented downwards in the mounted configuration of the air inlet vent 30. Thus the upper face 36B is preferably oriented towards the ceiling 14C.

[0031] The sleeve 34 is hollow and opens through an inlet mouth 38. In the example illustrated, the sleeve 34 passes through the wall 14A, while the intake vent 38 is located outside the building 12. In a variant not shown, the sleeve 34 is extended by a conduit, which is separate from the sleeve 34 and which carries the outside air to the intake vent 38.

[0032] The housing 32 provides a first conduit 40, which is extended by the sleeve 34 and which opens, via the intake vent 38, towards the exterior of the building 12 in the mounted configuration of the air inlet vent 30. In this configuration, the first conduit 40 also opens, into the interior volume V12, via an insufflation vent 42.

[0033] When the extraction member 28 is in operation, the depression generated in the interior volume V12 sucks in the outside air via the first duct 40, causing the circulation of a first air flow F40 in the first duct 40. Thus the first air flow F40 enters the air inlet opening 30 via the protection device 44, is guided into the first duct 40, then leaves the insufflation opening 42 into the interior volume V12. The first air flow F40 is therefore a flow of fresh air. The insufflation mouth 42 is arranged on one face of the housing 32, preferably on the upper face 36B, as shown in the figures, so that the first air flow F40 is directed towards the ceiling 14C when the ventilation installation 10 is in operation, to prevent the first outside air flow F40 from being directed directly towards the occupants of the building 12.

[0034] Advantageously, the air inlet mouth 30 is equipped with a protective device 44, provided to prevent foreign bodies, for example rain, insects, etc., from entering the first duct 40. In [Fig.l], the protective device 44 is represented schematically by inclined flaps, which partially close the intake mouth 38.

[0035] Advantageously, the air inlet mouth 30 comprises sound elements 46, which are configured to absorb the sound waves propagating through the first conduit 40. With reference to figure 4b), the sound elements 46 are here arranged in the conduit 40 and are for example made of a porous material, for example polyester foam, melamine, or equivalent.

[0036] The air inlet 30 advantageously comprises a filter 47, which is housed in the first duct 40 and which is configured to reduce a content of external pollutants contained in the first air flow F40. Thus, when the extraction member 28 is in operation and generates the first air flow F40, the first air flow F40 is partially freed from the external pollutants that it transports. In the example illustrated, the filter 47 is configured to filter the fine particles contained in the first air flow F40. The filter 47 is here a pleated filter.

[0037] Advantageously, the air inlet 30 comprises a flow limiter 48, which is configured to limit a flow rate of the first air flow F40 when an air pressure increases outside the building 12, for example in the event of strong wind and / or gusts. The flow limiter 48 is here received in the sleeve 34 and comprises a movable flap 50, which more or less closes the first duct 40 when the speed of the first air flow F40 increases.

[0038] Generally, the air inlet mouth 30 is designed to allow the first air flow F40 to pass with a regulated flow rate, that is to say a substantially stable flow rate, equal to a predetermined value. This predetermined value is for example linked to normative constraints, in particular health constraints on air renewal. Thus the first air flow F40 has a flow rate of between 3 m3 / h - cubic meter per hour - and 70 m3 / h. In the example illustrated, the air inlet mouth 30 is designed to allow a first air flow F40 to pass with a flow rate of 30 m3 / h, when a pressure difference AP between the flow limiter 48 and the insufflation mouth 42 is equal to 20 Pa - Pascal -.When the pressure difference AP increases, the flow rate of the first air flow F40, and therefore the speed of the first air flow F40, increases, which causes the movable flap 50 to partially close, reducing a passage section of the duct 40 - which leads to limiting the increase in the flow rate of the first air flow F40. The operation of the flow limiter 48 is not detailed further.

[0039] When the air in the interior volume V12 contains few indoor pollutants, it may be advantageous to reduce the flow rate of the first air flow F40, for example in winter to reduce the amount of cold air entering the building 12, to improve the comfort of the occupants. Conversely, when the interior air is loaded with indoor pollutants, for example loaded with humidity, it is recommended to temporarily increase the start of the first air flow F40. For this purpose, the air inlet vent 30 advantageously comprises a regulator 52, configured to regulate the first air flow F40 as a function of a level of pollutants in the interior volume V12. The regulator 52 here comprises flaps 54, which are received in the first duct 40 and which are pivotally mounted relative to the housing 32, so as to more or less close the first conduit 40. The regulator 52 also comprises a control member 56, which controls a position of the flaps 54 as a function of an interior pollutant level in the interior volume VI2.

[0040] In the example, the control member 56 is a humidity sensor, which here comprises a tab 58 made of a hygrosensitive material changing length depending on an ambient humidity level. The tab 58 drives the flaps 54 in rotation via a return part 60. The control member 56 is here received in a housing provided on the lateral face 36D and closed by a cover 62. The flow rate of the first air flow F40 being thus regulated by the humidity level prevailing in the interior volume V12, the air inlet mouth 30 is said to be “hygro-adjustable”.

[0041] The air inlet vent 30 also comprises a second duct 100. The duct 100 is here arranged in the housing 32. The second duct 100 comprises an inlet vent 102 and an outlet vent 104, the inlet vent 102 and outlet vent 104 each opening into the interior volume V12 of the building 12. Preferably, the inlet vent 102 and the outlet vent 104 are arranged opposite each other, here on opposite faces of the housing 32.

[0042] The inlet mouth 102 is here formed of two circular orifices, which are arranged on one face of the housing 32. The outlet mouth 104 is here formed of two rectangular orifices, which are arranged on one face of the housing 32 opposite the inlet mouth. The shape of each of the inlet mouths 102 or outlet mouths 104 is not limiting.

[0043] The air inlet vent 30 comprises a motor member 106, which is configured to move a second air flow F100 between the inlet vent 102 and the outlet vent 104. The second air flow F100 is therefore a recirculation flow in the interior volume V12. The motor member 106 is here formed of two fans, which are received in the second duct 100, opposite the two circular orifices of the inlet vent 102. Other configurations are possible.

[0044] The air inlet 30 also comprises an electronic card 108, which is configured to control the motor member 106. The electronic card 108 is here housed in the second duct 100. The electronic card 108 is supplied with electrical energy by means of an electricity source, for example a power cord, which is not shown.

[0045] Advantageously, the electronic card 108 comprises a sensor 110, which is configured to measure an interior pollutant content in the interior volume V12, while the card 108 is configured to start the motor member 106 when the interior pollutant content, measured by the sensor 110, exceeds a predetermined value. The sensor 110 is represented schematically by a rectangle on the electronic card 108. In a non-limiting manner, the sensor 110 is for example a CO2 sensor, and / or a VOC sensor and / or a fine particle sensor and / or a humidity sensor. Multiple combinations are possible. The measurement of one or more indoor pollutants thus makes it possible to evaluate the air quality in the indoor volume VI2.

[0046] In a variant not shown, the sensor 110 is remote, that is to say that the sensor is placed elsewhere in the interior volume V12, while transmitting measurement values ​​to the electronic card 108, for example by a wireless link. Alternatively or in addition, the electronic card 108 comprises a manual input, configured to receive orders sent by a user, for example using a button placed on the housing 32, or using a remote control. The button and the remote control are not shown.

[0047] In the example illustrated, a humidity content is measured by the control member 56, which regulates the flow rate of the first air flow F40, via the flaps 54, while the second air flow F100 is regulated via the electronic card 108 controlling the motor member 106, as a function of the measurements of the sensor 110.

[0048] The air inlet 30 advantageously comprises a filtration device 112, which is housed in the second duct 100 and which is configured to reduce a content of indoor pollutants contained in the second air flow F100 when the motor member 106 operates and generates the second air flow F100. The second air flow F100 is thus partially freed from the indoor pollutants that it transports. The filtration device 112 is configured to filter the volatile organic compounds - VOCs - and / or the fine particles contained in the second air flow F100.

[0049] In the illustrated example, the filtration device 112 is an activated carbon filter, configured to filter both VOCs and fine particles.

[0050] The first duct 40 and the second duct 100 are arranged so that when the first air flow F40 circulates in the first duct 40 and when the second air flow F100 circulates in the second duct 100, the first air flow F40 exchanges heat with the second air flow F100. The direction of this heat exchange depends on the temperature differential between the first air flow F40 and the second air flow F100. In winter, the first air flow F40 receives heat from the second air flow F100 and is thus heated. In summer, the first air flow F40 gives heat to the second air flow F100 and is thus cooled. More generally, it is said that the first air flow F40 exchanges heat with the second air flow F100.

[0051] In the illustrated example, the first conduit 40 and the second conduit 100 are separated by a partition 64, which is configured to exchange heat between the first air flow F40 and the second air flow F100. In other words, the partition 64 forms a heat exchanger between the first and second air flows F40 and F100.

[0052] According to non-limiting examples, the partition 64 is made of a synthetic polymer material, including thermally conductive fillers.

[0053] Thus, a temperature of the first air flow F40 is tempered. For example, in winter, while the outside air is cold, for example at 0°C, while the interior volume V12 is heated to 20°C, the first air flow F40 is heated by the second air flow F100, which reduces the discomfort of the occupants.

[0054] Preferably, the insufflation mouth 42 adjoins the outlet mouth 104, so that, when the motor member 106 and the extraction member 28 are operating, the first air flow F40, leaving the insufflation mouth 42, and the second air flow F100, leaving the outlet mouth 104, mix with each other. The temperature of the first air flow F40 is thus tempered more effectively. In the example illustrated, the insufflation mouth 42 and the outlet mouth 104 each open from the upper face 36B of the housing 32, while the inlet mouth 102 is arranged on the lower face 36A of the housing 32.

[0055] Thus, the air inlet 30 makes it possible, at the same time, to ensure the first air flow F40, which brings in fresh air, while if necessary, under the control of the electronic card 108, the second air flow F100 circulates to moderate the temperature of the first air flow F40, the second air flow F100 being depolluted by the filtration device 112. Preferably, the ionization device 114 is controlled and powered by the electronic card 108.

[0056] Advantageously, the air inlet 30 also comprises an ionization device 114, which is configured to ionize the air inside the building V12 so as to reduce an indoor pollutant content. The ionization device 114 is preferably controlled by the electronic card 108. Schematically, the ionization device 114 diffuses negative ions, which charge the particles - dust, viruses, etc. - present in the air, the charged particles then being knocked down. In the example illustrated, the ionization device 114 is mounted on the front face 35B of the housing 32 and is oriented towards the interior volume V12.

[0057] The ionization device 114 is configured to generate a density of negative ions, measured at 1 meter from the ionization device 114, of between 150,000 ions per cm3 - cubic centimeter - and 300,000, preferably of between 175,000 and 250,000, for example equal, to within ±10%, to 200,000 ions per cm3.

[0058] Optionally, a portion of the ionization device 114 is oriented towards the second duct 100, so as to generate ions in the second duct 100 when the second air flow F100 circulates in the second duct 100, directly purifying the second air flow F100.

[0059] More generally, it is understood that the air inlet vent 30 offers, in a single device, improved comfort while reducing installation work.

[0060] The embodiments and variants mentioned above can be combined with each other to generate new embodiments of the invention.

Claims

Claims

1. An air inlet vent (30), configured to be mounted on a wall (14A) of a building (12), the air inlet vent (30) comprising: • a housing (32), which provides a first duct (40) configured to guide a first air flow (F40) from the exterior of the building (12) to an interior volume (VI2) of the building (12) in the mounted configuration of the air inlet vent, the first duct (40) comprising: • an intake vent (38), through which the first air flow (F40) enters, and • an insufflation vent (42), which opens into the interior volume (VI2) of the building (12) and from which the first air flow (F40) emerges, characterized in that: • the housing (32) also provides a second conduit (100), which comprises an inlet vent (102) and an outlet vent (104), the inlet and outlet vents each opening into the interior volume (V12) of the building (12) in the assembled configuration of the air inlet vent, • the air inlet vent (30) comprises a motor member (106), configured to move a second air flow (F 100) between the inlet vent (102) and the outlet vent (104), and an electronic card (108), configured to control the motor member (106), and • the first duct (40) and the second duct (100) are arranged so that when the first air flow (F40) circulates in the first duct (40) and when the second air flow (F100) circulates in the second duct (100), the first air flow (F40) exchanges heat with the second air flow (F100).

2. An air inlet vent (30) according to claim 1, wherein: • the air inlet mouth comprises a regulator (52), which comprises a humidity sensor (56) configured to measure a humidity level in the interior volume (V12), • the regulator (52) is configured to regulate the first air flow (F40) according to the humidity level in the interior volume (V12).

3. Air inlet vent (30) according to any one of claims 1 or 2, wherein the first duct (F40) is configured to allow the air flow (F40) to pass when a depression prevails in the interior volume (V12), the air inlet vent (30) being intended for a single-flow ventilation installation (10).

4. Air inlet vent (30) according to any one of claims 1 to 3, further comprising: • a sensor (110), configured to measure a content of one or more indoor pollutants inside the building (12), wherein the electronic card (108) is configured to start the motor member (106) when the indoor pollutant content, measured by the sensor (110), exceeds a predetermined value.

5. An air inlet vent (30) according to claim 4, wherein the sensor (110) is configured to measure a volatile organic compound content and / or a fine particle content.

6. Air inlet vent (30) according to any one of claims 1 to 5, further comprising: • an ionization device (114), which is configured to ionize the air in the interior volume (VI2) of the building (12) so as to reduce an interior pollutant content, wherein the ionization device (114) is controlled by the electronic card (108).

7. The air inlet vent (30) of claim 6, wherein a portion of the ionization device (114) is configured to generate ions in the second duct (100) when the second air flow (F 100) flows in the second duct (100).

8. An air inlet (30) according to any one of claims 1 to 7, wherein: • the air inlet (30) comprises a filtration device (112), which is configured to reduce a content of indoor pollutants contained in the second air flow (F 100) when the motor member (106) generates the second air flow (F100).

9. Air inlet vent (30) according to claim 8, wherein: • the filtration device (112) is housed in the second duct (100), and comprises: • an activated carbon filter, which is configured to reduce a content of volatile organic compounds in the second air flow (F 100) when the motor member (106) generates the second air flow (F 100), and / or • a fine particle filter, which is configured to reduce a content of fine particles in the second air flow (F100) when the motor member (106) generates the second air flow (F 100).

10. Air inlet vent (30) according to any one of claims 1 to 9, wherein: • the air inlet vent (30) comprises a filter (47), which is configured to reduce a content of external pollutants contained in the first air flow (F40).

11. Air inlet vent (30) according to any one of the preceding claims, wherein: • the inlet vent (102) and the outlet vent (104) are arranged opposite each other, • the insufflation vent (42) adjoins the outlet vent (104), so that the first air flow (F40), leaving the insufflation vent (42), and the second air flow (F100), leaving the outlet vent (104), mix with each other.

12. An air inlet vent (30) according to any preceding claim, wherein the first duct (40) and the second duct (100) are separated by a partition (64) configured to heat exchange between the first air flow (F40) and the second air flow (F100).

13. Ventilation installation (10), comprising: • at least one air inlet vent (30) according to any one of claims 1 to 12, each air inlet vent (30) being fixed to a wall (14A) of the building (12) so that the first air flow (F40) is a fresh air flow, and • an extraction device (10), configured to extract an extracted air flow (F22) from the interior of the building (12) and to generate, by depression in the interior volume (V12) of the building (12), the first air flow (F40).

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