Air extraction or supply outlet comprising a mesoporous solid

Abstract

Air supply or exhaust vent (1) for a controlled mechanical ventilation system (2), the vent (1) comprising a hollow body (3) forming an internal cavity (4) and comprising at least one air inlet (5) in the cavity (4) and an air outlet (6) from the cavity (4), the air outlet (6) being configured to be connected to an air supply or exhaust duct (7) of a controlled mechanical ventilation system (2); the vent (1) further comprising at least one mesoporous solid (8) configured to absorb at least some of the moisture present in the air circulating between said at least one air inlet (5) and said air outlet (6). Figure for abbreviation: Figure 2

Description

Title of the invention: Air extraction or supply vent comprising a mesoporous solid technical field

[0001] The present invention relates to the field of air extraction or supply in a building. In particular, the invention relates to an air extraction or supply vent and a controlled mechanical ventilation system comprising such a vent. Technological background

[0002] To control humidity in a room, especially a so-called wet room such as a bathroom, it is known to use a controlled mechanical ventilation (CMV) system comprising an air extraction or supply vent in said room.

[0003] However, the renewal of air in the humid room caused by the extraction or insufflation of air can lead to significant energy consumption to heat or cool the renewed air.

[0004] To limit this energy consumption, it has been proposed to use air extraction or supply vents whose opening is regulated according to the room's humidity level, so as to extract or supply more air when humidity is high. However, this solution is not entirely satisfactory because it requires extraction or supply flow rates that remain significant.

[0005] It has also been proposed to use dampers on the extraction ducts at the level of a mechanical ventilation unit to regulate the flow rate according to the humidity level in the room. However, this solution is more complex to implement and more expensive.

[0006] Furthermore, in damp rooms such as bathrooms, in addition to managing energy consumption due to air renewal, there is a problem with humidity saturation. This saturation is characterized in particular by the appearance of condensation on surfaces such as walls, ceilings, or mirrors. Even with a mechanical ventilation system (MVHR) meeting industry standards, a usage scenario more demanding than those established by industry standards can cause the MVHR system's capacity to become "saturated." For example, a larger number of people taking showers, a colder room temperature, poor insulation, a thermal bridge, or high initial humidity are all risk factors for the development of humidity-related discomfort.

[0007] There is a need to improve mechanical ventilation systems to have better management of energy consumption for heating or air conditioning.

[0008] There is also a need to improve mechanical ventilation systems to have better humidity management. Summary of the invention

[0009] The present invention meets these needs by means of, according to one of its aspects, an air extraction or supply vent for a controlled mechanical ventilation system, the vent comprising a hollow body forming an internal cavity and comprising at least one air inlet into the cavity and an air outlet from the cavity, the air outlet being configured to be connected to an air extraction or supply duct of a controlled mechanical ventilation system; the mouth further comprising at least one mesoporous solid configured to absorb at least part of the moisture present in air circulating between said at least one air inlet and said air outlet.

[0010] Thanks to the presence of the mesoporous solid at the opening, air set in motion by the controlled mechanical ventilation system circulates around the mesoporous solid, particularly air with a velocity between 0.1 and 2 m / s. This circulation promotes the absorption of moisture from the air when its humidity level is high. Furthermore, the mesoporous solid allows for rapid absorption of moisture from air at high humidity levels and a gradual release of moisture when the air is drier. Thus, the mesoporous solid enables effective humidity management in the room, which improves the hygrometric and / or hygrothermal quality, while limiting moisture saturation in the controlled mechanical ventilation system through the gradual release of moisture, due to the duration and amount of condensation.

[0011] Thanks to the mesoporous solid and its ability to absorb some of the moisture present in the air, it is possible to have a reduced supply or exhaust air flow compared to conventional vents, which limits the energy required to maintain a desired temperature range in the room.

[0012] By “mesoporous solid”, we mean a solid having pores whose diameters vary between 2 and 50 nanometers.

[0013] Said at least one mesoporous solid may be positioned in the internal cavity of the hollow body or around the hollow body at least at the level of said at least one air inlet and / or adjacent to said at least one air inlet.

[0014] The hollow body may comprise an external groove, said at least one air inlet being in a bottom of the groove, said at least one mesoporous solid being positioned around the hollow body in the groove at least at the level of said at least one air inlet.

[0015] The hollow body can define a main airflow passage, preferably extending substantially linearly between said at least one air inlet and the air outlet, said at least one mesoporous solid bordering the main airflow passage. This configuration makes it possible to limit pressure losses and thus reduce energy consumption for air extraction or supply.

[0016] The cavity of the hollow body can be subdivided into several distinct subcavities, the subcavities being delimited from each other by walls, which walls being provided with perforations allowing fluidic communication between the subcavities, one of the subcavities defining the main passage, said at least one mesoporous solid being positioned in at least one other subcavity.

[0017] Said at least one sub-cavity in which the mesoporous solid is positioned includes a secondary air inlet allowing airflow between the secondary air inlet and the air outlet.

[0018] Said at least one air inlet and said air outlet preferably open into the sub-cavity defining the main passage.

[0019] The mouth may include a device for adjusting, in particular a humidity-controlled device, the airflow between said at least one air inlet and the air outlet.

[0020] The mouth may include a room humidity sensor.

[0021] The invention also relates, according to another aspect, in combination with the foregoing, to a controlled mechanical ventilation system for the ventilation of at least one dwelling, comprising: - a central box containing an air extraction fan; - a network of air extraction or supply ducts connected to said central unit, each duct opening into a room of said at least one dwelling; - at least one air extraction or supply vent as defined above, said at least one vent being connected to a duct at one end opening into a room.

[0022] The system may include a plurality of air flow regulators with adjustable passage opening, each associated with an extraction or supply duct to regulate each air flow in a room to be treated in said at least one dwelling according to a predefined flow control law.

[0023] Said at least one extraction vent may be in a damp room, in particular a bathroom. Brief description of the figures

[0024] The following description, with reference to the accompanying drawings, given by way of non-limiting examples, will clearly explain what the invention consists of and how it can be implemented. In the accompanying figures:

[0025] [Fig-1] Fig. 1 shows a schematic view of a ventilation system controlled mechanics according to the invention;

[0026] [Fig.2] Figure [Fig.2] illustrates in cross-section, side view, an extraction or insufflation opening of air according to the invention; and

[0027] [Fig.3] Figure [Fig.3] illustrates, from the side, another air extraction or supply vent according to the invention. Description of method(s) of implementation

[0028] In the following description, identical elements or elements with identical functions bear the same reference numeral. For the sake of brevity, they are not described opposite each figure; only the differences between the embodiments are described.

[0029] In the figures, the actual proportions have not always been respected, for the sake of clarity.

[0030] Figure 1 illustrates an example of a controlled mechanical ventilation system 2 according to the invention.

[0031] The controlled mechanical ventilation system 2 comprises a central unit 16 including an air extraction fan. This central unit 16 is connected to a network of air extraction or supply ducts 7, each duct 7 opening into a room of a dwelling, for example into damp rooms (bathroom, toilet, kitchen, etc.).

[0032] System 2 also includes an exhaust duct 20 connected to the central box 16.

[0033] The controlled mechanical ventilation system 2 may include a plurality of air flow regulators 17 with adjustable passage opening, each associated with a duct 7 to regulate the air flow in a room to be treated according to a predefined flow control law.

[0034] Air extraction or supply vents 1 are connected to each of the ducts 7 at one end opening into a room.

[0035] As illustrated in Figures 2 and 3, showing examples of extraction vents, each vent 1 comprises a hollow body 3 forming an internal cavity 4 with at least one air inlet 5 and one air outlet 6. The air outlet 6 is configured to be connected to a duct 7 of the controlled mechanical ventilation system 2.

[0036] The mouth 1 further includes at least one mesoporous solid 8 configured to absorb at least part of the moisture present in the air circulating between the air inlet 5 and the air outlet 6.

[0037] In one embodiment, illustrated in [Fig.2], the mesoporous solid 8 is positioned in the internal cavity 4 of the hollow body 3.

[0038] The cavity 4 of the hollow body 3 is for example subdivided into several distinct subcavities 12, delimited by walls 13 provided with perforations 14 allowing fluidic communication between the subcavities 12.

[0039] One of the subcavities 12 defines a main passage 11 of airflow, extending substantially linearly between the air inlet 5 and the air outlet 6. The mesoporous solid 8 is positioned in at least one other subcavity 12 so as to border the main passage 11 of airflow.

[0040] The or each of the subcavities 12 containing the mesoporous solid 8 includes a secondary air inlet 15 allowing airflow between the secondary air inlet 15 and the air outlet 6.

[0041] In this embodiment, the mesoporous solid 8 is not visible outside the mouth 1.

[0042] In another embodiment, illustrated in [Fig.3], the mesoporous solid is arranged around and outside the hollow body 3 at the level of the air inlet 5.

[0043] For example, the hollow body 3 includes an external groove 9, the air inlet 5 being located in the bottom 10 of the groove 9, the mesoporous solid 8 being positioned around the hollow body 3 in the groove 9 at least at the level of the air inlet 5. Thus, at least part of the air which is extracted for the mouth 1 passes through the mesoporous solid 8. This configuration guarantees better moisture exchange between the air and the mesoporous solid 8, but produces more pressure losses.

[0044] The vent 1 may also include a control device, in particular a hygro-adjustable one, such as motorized flaps or hydro-inflatable membranes of an airflow between the air inlet 5 and the air outlet 6, as well as a room humidity sensor.

[0045] The invention is not limited to the examples just described.

[0046] In particular, the vents 1 can be air supply vents. In this case, the air inlets and outlets are reversed.

Claims

Demands

1. Air supply or exhaust vent (1) for a controlled mechanical ventilation system (2), the vent (1) comprising a hollow body (3) forming an internal cavity (4) and comprising at least one air inlet (5) in the cavity (4) and an air outlet (6) from the cavity (4), the air outlet (6) being configured to be connected to an air supply or exhaust duct (7) of a controlled mechanical ventilation system (2); the vent (1) further comprising at least one mesoporous solid (8) configured to absorb at least part of the moisture present in air circulating between said at least one air inlet (5) and said air outlet (6).

2. Mouth (1) according to claim 1, wherein said at least one mesoporous solid (8) is positioned in the internal cavity (4) of the hollow body (3) or around the hollow body (3) at least at the level of said at least one air inlet (5) and / or adjacent to said at least one air inlet (5).

3. Mouth (1) according to the preceding claim, wherein the hollow body (3) comprises an external groove (9), said at least one air inlet (5) being in a bottom (10) of the groove (9), said at least one mesoporous solid (8) being positioned around the hollow body (3) in the groove (9) at least at the level of said at least one air inlet (5).

4. Mouth (1) according to any one of the preceding claims, wherein the hollow body (3) defines a main passage (11) of airflow, preferably extending substantially linearly between said at least one air inlet (5) and the air outlet (6), said at least one mesoporous solid (8) bordering the main passage (11) of airflow.

5. Mouth (1) according to the preceding claim, wherein the cavity (4) of the hollow body (3) is subdivided into several distinct subcavities (12), the subcavities (12) being delimited from each other by walls (13), which walls (13) being provided with perforations (14) allowing fluidic communication between the subcavities (12), one of the subcavities (12) defining the main passage (11), said at least one mesoporous solid (8) being positioned in at least one other subcavity (12).

6. Mouth (1) according to the preceding claim, wherein said at least one sub-cavity (12) in which the mesoporous solid (8) is positioned comprises a secondary air inlet (15) allowing airflow between the secondary air inlet (15) and the air outlet (6).

7. Mouth (1) according to any one of claims 5 and 6, wherein said at least one air inlet (5) and said air outlet (6) open into the sub-cavity (12) defining the main passage (11).

8. Mouth (1) according to any one of the preceding claims, comprising a device for adjusting, in particular humidity-controlled, an airflow between said at least one air inlet (5) and the air outlet (6).

9. Mouth (1) according to any one of the preceding claims, comprising a room humidity sensor.

10. Controlled mechanical ventilation system (2) for the ventilation of at least one dwelling, comprising: - a central unit (16) having an air extraction fan; - a network of air extraction or supply ducts (7) connected to said central unit (16), each duct (7) opening into a room of said at least one dwelling; - at least one air extraction or supply vent (1) according to any one of the preceding claims, said at least one vent (1) being connected to a duct (7) at one end opening into a room.

11. System (2) according to the preceding claim, comprising a plurality of air flow regulators (17) with adjustable passage opening, each associated with an extraction or supply duct (7) to regulate each air flow in a room to be treated in said at least one dwelling according to a predefined flow control law.

12. System (2) according to any one of claims 10 and 11, wherein said at least one extraction vent (1) is in a wet room, in particular a bathroom.

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