Improved single flow ventilation system

Abstract

The present invention relates to a single-flow ventilation system (10) comprising: - A fan (16); - A centralized extraction flow device (18) comprising: ∘ a first air inlet (20) configured to be connected to a first room (102), ∘ a second air inlet (22) configured to be connected to a second room (104), and ∘ an air outlet (24) connected to the fan (16); - A first means for regulating an air flow in the first air inlet; - A second means for regulating an air flow in the second air inlet; - Air measurement means (32) arranged to perform a measurement in the first air inlet and in the second air inlet; A control device (34) configured to control the first and second regulation means according to information communicated by the air measurement means.

Description

[0001] The invention relates to the field of single-flow ventilation systems for premises, such as individual or collective housing, or tertiary premises, comprising several rooms.

[0002] Currently, single-flow ventilation systems for premises comprise a fan connected to one or more air extraction vents by ventilation ducts. The fan is generally placed, for example, in attics or on a roof or in a false ceiling of the premises, while the air extraction vents are placed in different rooms of the premises, called technical rooms (for example, kitchens, bathrooms or toilets). In addition, these single-flow ventilation systems comprise air inlet openings placed in so-called main rooms (for example, bedrooms, living rooms or offices) in order to connect an air flow external to the main room and an air flow internal to the main room. These air inlet openings allow air movement from the outside to the inside of the main rooms, thanks to a depression created by the fan, via the air extraction vents.This depression is created because the premises have a substantially closed volume. More specifically, the depression generated by the fan in the premises via the extraction vents generates a pressure difference between the outside of the main room and the inside of the main room at the air inlet openings. It is this pressure difference that causes the movement of air from the outside of the main room to the inside of the main room, through the air inlet openings. These air inlet openings can be called air inlets.

[0003] For any room ventilation system, operating conditions are defined. These operating conditions are, for example, an air extraction flow rate that can be fixed, modulated or intermittent, for example, depending on a humidity level, a CO2 and / or VOC concentration, detection of the presence of people by pyroelectric sensors, a schedule of pre-established hours and / or days.

[0004] Document EP 2 743 597 A1 shows a single-flow ventilation system for premises according to the preamble of claim 1.

[0005] The main aim of the invention is to improve the efficiency of a single-flow ventilation system for premises, by proposing a single-flow ventilation system for premises according to claim 1. In particular, said system comprises a plurality of parts, the single-flow ventilation system comprising: A fan; A device for centralizing extraction flow rates comprising: ∘ a first air inlet configured to be connected to a first room of the plurality of rooms, ∘ a second air inlet configured to be connected to a second room of the plurality of rooms, and ∘ an air outlet connected to the fan by an outlet duct; A first means for regulating an air flow rate circulating in the first air inlet; A second means for regulating an air flow rate circulating in the second air inlet, Air measuring means arranged to carry out a measurement of the air in the first air inlet, and a measurement of the air in the second air inlet;A control device configured to control the first means for regulating the flow of air circulating in the first air inlet according to information communicated by the air measuring means, and to control the second means for regulating the flow of air circulating in the second air inlet according to information communicated by the air measuring means.;

[0006] The first air inlet of the centralization device is configured to be connected to a first extraction vent arranged in the first room. The second air inlet of the centralization device is configured to be connected to a second extraction vent arranged in the second room. Thus, an air flow circulates in each air inlet, from each room to the fan, via the centralization device.

[0007] The ventilation system allows for regulation of the airflow circulating in each air inlet, i.e., ventilation regulation room by room. The extraction flow rate of each room is modulated independently. The ventilation system improves the efficiency of a single-flow room ventilation system.

[0008] According to other characteristics of the invention, the single-flow ventilation system comprises one or more of the following optional characteristics, considered alone or in all possible combinations: The sensor is integrated into the extraction flow centralization device; The air measuring means comprise a flow selector configured to selectively connect the air from the first air inlet or the air from the second air inlet with the sensor; The flow selector comprises inlet means comprising a plurality of inlet orifices including a first inlet orifice and a second inlet orifice, the first inlet orifice being configured to be connected to the first air inlet, and the second inlet orifice being configured to be connected to the second air inlet; The flow selector comprises outlet means comprising a first outlet orifice configured to be connected to the sensor;The flow selector comprises means for connecting the inlet means to the outlet means, the connecting means being movable relative to the inlet means, and comprising a first connecting chamber arranged to selectively connect one of the inlet ports of the plurality of inlet ports to the first outlet port, so that a flow circulates from the inlet port connected to the first outlet port, towards the first outlet port;In addition to said common sensor, the air measuring means comprise a first sensor for measuring a significant magnitude of a ventilation requirement, such as a CO2 and / or humidity and / or VOC and / or temperature sensor, the first sensor being configured to be placed in communication with the air of the first air inlet, and a second sensor for measuring a significant magnitude of a ventilation requirement, such as a CO2 and / or humidity and / or VOC and / or temperature sensor, the second sensor being configured to be placed in communication with the air of the second air inlet; The air measuring means comprise means for sampling air from the first air inlet and from the second air inlet; The air sampling means are at least partly arranged in the extraction flow centralization device;The air measuring means comprise means for calibrating the measurement of the air from the first air inlet, and the measurement from the second air inlet; The calibration means are arranged to carry out an air measurement in a reference zone, called a clean zone, for example free of pollutant significant for the ventilation requirement or comprising a negligible quantity of pollutant significant for the ventilation requirement; The calibration means are arranged to put the sensor into communication with the air of a reference zone; The single-flow ventilation system comprises a first extraction vent configured to be arranged in the first room; The single-flow ventilation system comprises a second extraction vent configured to be arranged in the second room;The single-flow ventilation system comprises a first inlet duct configured to connect the first extraction vent to the extraction flow centralization device; The single-flow ventilation system comprises a second inlet duct configured to connect the second extraction vent to the extraction flow centralization device; The first air flow regulation means is arranged in the first air inlet of the extraction flow centralization device; The second air flow regulation means is arranged in the second air inlet of the extraction flow centralization device; The first regulation means is arranged in the first inlet duct of the single-flow ventilation system; The second regulation means is arranged in the second inlet duct of the single-flow ventilation system;The first and / or second air flow control means is / are an air flow management valve; The air flow management valve comprises a closure means, such as a flap, movable between an open position and a closed position of the valve; The air flow management valve comprises an actuator configured to drive the closure means; The extraction flow centralization device is remote from the fan; The single-flow ventilation system comprises pressure measurement means arranged to perform a pressure measurement in the extraction flow centralization device; The first part and / or the second part are so-called main parts, comprising an air inlet opening allowing air movement from the outside to the inside of the main part;The extraction flow centralization device comprises at least one additional air inlet configured to be connected to an additional room of the plurality of rooms.

[0009] Other characteristics and advantages of the present invention will appear on reading the description which follows and on examining the appended figures in which: there figure 1 is a schematic view of a single-flow ventilation system according to a first embodiment of the invention; figure 2 is a schematic view of a single-flow ventilation system according to a second embodiment of the invention; figure 3 is a schematic perspective view of the device for centralizing extraction flows of the ventilation system of figures 1 et 2 ; there figure 4 is an exploded view of the extraction flow centralization device of the figure 3 ; there figure 5 is a partial schematic view of the extraction flow centralization device of the figure 3 ; there figure 6 is a schematic sectional view of a means for regulating an air flow, comprising a closure means in the open position in a ventilation system according to an embodiment of the invention; figure 7 is a schematic sectional view of a means for regulating an air flow, comprising a closing means in the closed position in a ventilation system according to an embodiment of the invention; figure 8 is a schematic perspective view of the means of regulating the figure 6 ; there figure 9 is a schematic view of a flow selector according to a first embodiment, of the device for centralizing extraction flow rates of the figure 3 ; there figure 10 is an exploded view of the flow selector of the figure 9 ; there figure 11 is an exploded view of a flow selector according to a second embodiment, of the device for centralizing extraction flow rates of the figure 3 ; there figure 12 is a sectional view of the flow selector of the figure 11 ; there figure 13 is an exploded view of a flow selector according to a third embodiment, of the device for centralizing extraction flow rates of the figure 3 ; there figure 14 is a sectional view of the flow selector of the figure 13 .

[0010] In the following description and in the claims, identical, similar or analogous components will be designated by the same reference numbers. The terms upstream and downstream are understood to refer to the direction of circulation of the air flows.

[0011] THE figures 1 et 2 illustrate a single-flow ventilation system 10 according to two embodiments of the invention.

[0012] The single-flow ventilation system 10 is configured to allow the ventilation of premises 100 comprising a plurality of rooms, including at least a first room 102 and a second room 104.

[0013] The first room 102 may comprise a first extraction vent 12. The second room 104 may comprise a second extraction vent 14. The single-flow ventilation system 10 may comprise a first extraction vent 12 configured to be arranged in the first room 102. The single-flow ventilation system 10 may comprise a second extraction vent 14 configured to be arranged in the second room 104.

[0014] The single-flow ventilation system 10 comprises a fan 16. The fan 16 can be connected to the first 12 and second 14 extraction vents to perform air extraction in the first 102 and second 104 rooms.

[0015] The ventilation system 10 comprises an extraction flow centralization device 18 comprising a first air inlet 20 configured to be connected to the first part 102, and a second air inlet 22 configured to be connected to the second part 104. The extraction flow centralization device 18 also comprises an air outlet 24.

[0016] The extraction flow centralization device 18 may comprise more than two air inlets 20, 22. The extraction flow centralization device 18 comprises at least one first air inlet 20, and at least one second air inlet 22.

[0017] The extraction flow centralization device 18 can be called an extraction hub.

[0018] The extraction flow centralization device 18 can be offset from the fan 16, preferably at a distance of between 1 and 10 m from the fan 16. Thus, the extraction flow centralization device 18 is far from a noise source represented by the fan 16. The extraction flow centralization device 18 makes it possible to break the direct connection with the noise source represented by the fan.

[0019] The single-flow ventilation system 10 comprises an outlet duct 26 for connecting the air outlet 24 of the extraction flow centralization device 18 to the fan 16.

[0020] The single-flow ventilation system 10 comprises a first means 28 for regulating a flow of air circulating in the first air inlet 20, and a second means 30 for regulating a flow of air circulating in the second air inlet 22. Thus, the extraction flow of the first and second rooms is modulated independently.

[0021] The single-flow ventilation system 10 comprises air measuring means 32 arranged to carry out a measurement of the air in the first air inlet 20, and a measurement of the air in the second air inlet 22.

[0022] The single-flow ventilation system 10 comprises a control device 34 configured to control the first means 28 for regulating the air flow circulating in the first air inlet 20 according to information communicated by the air measuring means 32, and to control the second means 30 for regulating the air flow circulating in the second air inlet 22 according to information communicated by the air measuring means 32. The control device 34 is configured to control each regulating means 28, 30 according to the information communicated by the air measuring means 32.

[0023] The air measuring means 32 comprise a sensor 36 for measuring a significant quantity of a ventilation requirement. The sensor 36 may be, for example, a CO2 and / or humidity and / or VOC and / or temperature sensor. The sensor 36 is configured to be placed in communication with the air of the first air inlet 20 or with the air of the second air inlet 22. The sensor 36 may be arranged in the extraction flow centralization device 18. The sensor 36 may be integrated into the extraction flow centralization device 18. Thus, the sensor 36 is easily accessible. The sensor 36 may be remote from the extraction flow centralization device 18.

[0024] A sensor for measuring a significant quantity of a ventilation requirement is understood to mean, for example, a pollutant sensor, the sensor being configured to measure the quantity or presence of pollutant, so as to adapt the ventilation according to the measurement of the pollutant. The ventilation requirement is a function of the measurement of the quantity or presence of pollutant.

[0025] The sensor 36 is a common sensor configured to be placed in communication alternately with the air of the first air inlet 20 and the air of the second air inlet 22 (the sensor 36 is thus a sensor common to the first air inlet 20 and to the second air inlet 22). Thus, the cost of the air measuring means 32 can be reduced. In addition, it is possible to use a better quality sensor 36, generally more expensive.

[0026] The air measuring means 32 may comprise air sampling means 33 in the first air inlet 20, and air sampling means 33 in the second air inlet 22. The air sampling means 33 may comprise a tube comprising a first end connected respectively to the first 20 or second 22 air inlet, and a second end connected to the sensor 36. Each air inlet 20, 22, may comprise air sampling means 33.

[0027] The sensor 36 can be configured to be placed in communication with the air of the first air inlet 20 or with the air of the second air inlet 22, via the air sampling means 33.

[0028] The air sampling means 33 may be arranged in the extraction flow centralization device 18. The air sampling means 33 may be partly arranged in the extraction flow centralization device 18.

[0029] In addition to said common sensor, the air measuring means 32 may comprise a first sensor for measuring a significant magnitude of a ventilation requirement, configured to be placed in communication with the air of the first air inlet 20, and a second sensor for measuring a significant magnitude of a ventilation requirement, configured to be placed in communication with the air of the second air inlet 22. The first sensor and / or the second sensor may be, for example, CO2 and / or humidity and / or VOC and / or temperature sensors. The first sensor and / or the second sensor may be arranged in the extraction flow centralization device 18. The first sensor and / or the second sensor may be remote from the extraction flow centralization device 18.

[0030] The air measuring means 32 may comprise several sensors 36 of different nature, that is to say several types of sensors, for example a CO2 sensor and a humidity sensor. The several types of sensors may be arranged in the extraction flow centralization device 18. For example, one example of each type of sensor may be arranged in the extraction flow centralization device 18. The several types of sensors may be remote from the extraction flow centralization device 18. The selector may be configured to alternately put each type of sensor 36 into communication with the air from the first air inlet 20 and the air from the second air inlet 22.

[0031] The single-flow ventilation system 10 may comprise at least one sensor 36 configured to measure a significant magnitude of a ventilation requirement. The at least one sensor 36 may be a CO2 and / or humidity and / or VOC and / or temperature sensor. The at least one sensor 36 may be arranged in the extraction flow centralization device 18. The at least one sensor 36 may be remote from the extraction flow centralization device 18.

[0032] The extraction flow centralization device 18 may comprise pressure measuring means arranged to perform a pressure measurement in the extraction flow centralization device 18. Thus, the single-flow ventilation system 10 makes it possible to regulate the flow rates in the first and second rooms more precisely. The control device 34 may be configured to control the first regulating means 28 of the air flow circulating in the first air inlet 20 and / or the second regulating means 30 of the air flow circulating in the second air inlet 22, according to information communicated by the pressure measuring means. The control device 34 may be configured to control each regulating means 28, 30 according to the information communicated by the pressure measuring means.

[0033] The pressure measuring means may comprise a pressure sensor. The pressure sensor may be configured to be placed in communication with the air internal to the extraction flow centralization device 18. The pressure sensor may be arranged in the extraction flow centralization device 18.

[0034] The pressure sensor can be integrated into the extraction flow centralization device 18. Thus, the pressure sensor is easily accessible.

[0035] The pressure sensor can be removed from the extraction flow centralization device 18.

[0036] The pressure measuring means may comprise air sampling means in the extraction flow centralization device 18. The air sampling means may comprise a tube comprising a first end connected to the extraction flow centralization device 18, and a second end connected to the pressure sensor. The pressure sensor may be configured to be placed in communication with the air of the extraction flow centralization device 18, via the air sampling means.

[0037] The air measuring means 32 may comprise calibration means 39. The calibration means 39 may make it possible to calibrate the measurement of the air from the first air inlet 20, and from the second air inlet 22. The calibration means 39 may be means for calibrating the sensor 36. The calibration means 39 may be arranged to carry out an air measurement in a reference zone, called a clean zone, for example free of pollutant significant of the ventilation need or comprising a negligible quantity of pollutant significant of the ventilation need. Thus, a measurement corresponding to air free of pollutant significant of the ventilation need is available. The calibration means 39 make it possible to compensate for any drift due to the aging of the sensor 36.For example, a CO2 level in the air of the first air inlet 20, a CO2 level in the air of the second air inlet 22, and a CO2 level in the air of the reference area, such as an attic or a false ceiling of the premises, can be measured.

[0038] The calibration means 39 can be arranged to put the sensor 36 into communication with the air of the reference zone.

[0039] The calibration means 39 may comprise means for sampling air in the reference zone, such as a tube comprising a first end connected to the reference zone, and a second end connected to the sensor 36.

[0040] The sensor 36 may be a self-calibrating sensor. For example, the sensor 36 may be an “ABC logic™” type CO2 sensor. The “ABC logic™” sensor self-calibrates by assigning a value of 400 ppm to the lowest measured value that is sufficiently stable for a period of time. The “ABC logic™” sensor self-calibrates by assigning a value of 400 ppm to the measured value in the clean zone.

[0041] The first regulation means 28 and / or the second regulation means 30 may be a valve for managing an air flow circulating respectively in the first air inlet 20 and / or in the second air inlet 22.

[0042] The first regulating means 28 and / or the second regulating means 30 may comprise a closing means 46, such as a shutter.

[0043] The first regulating means 28 can be arranged in the first air inlet 20 of the extraction flow centralization device 18. The second regulating means 30 can be arranged in the second air inlet 22 of the extraction flow centralization device 18. Thus, the single-flow ventilation system 10 allows easy access to the air flow regulating means. Each air inlet 20, 22 can comprise a regulating means 28, 30 of the air flow circulating in the air inlet.

[0044] The single-flow ventilation system 10 may comprise the first extraction vent 12 configured to be arranged in the first room 102. The single-flow ventilation system 10 may comprise the second extraction vent 14 configured to be arranged in the second room 104. The first extraction vent 12 may be connected to the first air inlet 20 of the extraction flow centralization device 18 by a first inlet duct 40. The second extraction vent 14 may be connected to the second air inlet 22 of the extraction flow centralization device 18 by a second inlet duct 42.

[0045] The inlet and outlet ducts form ventilation ducts. The single-flow ventilation system 10 may comprise a plurality of ventilation ducts 40, 42.

[0046] The single-flow ventilation system 10 may comprise the first inlet duct 40 configured to connect the first extraction vent 12 to the extraction flow centralization device 18. The single-flow ventilation system 10 may comprise the second inlet duct 42 configured to connect the second extraction vent 14 to the extraction flow centralization device 18.

[0047] The extraction flow centralization device 18 can be arranged between the first 12 and second 14 extraction vents, and the fan 16.

[0048] The first regulating means 28 may be arranged in the first inlet duct 40 of the single-flow ventilation system 10. The second regulating means 30 may be arranged in the second inlet duct 42 of the single-flow ventilation system 10. The first regulating means 28 may be arranged upstream of the extraction flow rate centralization device 18, preferably at a distance of between 1 and 30 cm from the first air inlet 20. The second regulating means 30 may be arranged upstream of the extraction flow rate centralization device 18, preferably at a distance of between 1 and 30 cm from the second air inlet 22. The regulating means 28, 30 may be arranged upstream of the extraction flow rate centralization device 18.

[0049] The second room 104 may be a so-called main room, that is to say comprising an air inlet opening 106 configured to connect an air flow external to the main room and an air flow internal to the main room. The air inlet opening 106 allows air movement from the outside to the inside of the main room, thanks to a depression created by the fan 16, via the air extraction vents. The air inlet opening 106 may be a non-motorized ventilation means.

[0050] The second room 104 may be a so-called technical room, i.e. one without an air inlet opening. The premises 100 may comprise a plurality of technical rooms.

[0051] The first room 102 may be a main room, i.e. comprising an air inlet opening 106 configured to connect an air flow external to the main room and an air flow internal to the main room. Thus, the premises 100 may comprise a plurality of main rooms, such as two main rooms.

[0052] The first room 102 may be a so-called technical room, i.e. one without an air inlet opening. The premises 100 may comprise a plurality of technical rooms.

[0053] The first part 102 and the second part 104 may be main parts. Alternatively, the first part 102 and the second part 104 may be technical parts. Alternatively, the first part 102 may be a technical part and the second part 104 a main part.

[0054] The operating conditions of the ventilation system can be influenced by so-called disruptive phenomena, such as the presence of air leaks in the premises, wind outside the premises, or a temperature difference between the interior of the premises and the exterior of the premises. In the absence of one of these disruptive phenomena, the total air extracted by the extraction vents is generally distributed in proportion to the air inlet openings in the main rooms. In other words, generally speaking, the air flow extracted by the extraction vents corresponds to the sum of the air flows circulating at each air inlet opening of the main rooms.

[0055] The presence of air leaks in the premises reduces the air flow circulating at the air intake openings, and therefore reduces the efficiency of the ventilation system in the main rooms.

[0056] In addition, the presence of wind generates pressure on the exterior facades of the premises: positive pressures on the windward facades, i.e. facing the wind, and negative pressures on the other facades, and in particular the leeward facades, i.e. opposite the windward facades.

[0057] Air intake openings located on windward facades are favored, while air intake openings located on other facades are disadvantaged, that is, the airflow circulating at the windward facades is greater than the airflow circulating at the other facades. Indeed, the overpressure generated on the windward facades adds to the depression generated by the fan. Conversely, the depression generated on the other facades opposes the depression generated by the fan. Some main rooms may therefore be disadvantaged and the efficiency of the ventilation system is reduced in these rooms.

[0058] Furthermore, if the outside temperature is lower than the inside temperature, a thermal draft regime is established: the cold outside air is heavier than the hot inside air and a parasitic air flow is established from the air intake openings and / or leaks located in the main rooms on the ground floor, towards the air intake openings located in the main rooms on the upper floors. Such a thermal draft regime can go as far as cancelling all air passage at the level of the main rooms located on the upper floors, or even to a reversed air passage, with an air flow from the inside to the outside of the dwelling in extreme cases. Here again, the efficiency of the ventilation system is reduced.

[0059] These disruptive phenomena can combine.

[0060] In the case where at least one of the first 102 and second 104 rooms is a main room, the ventilation system makes it possible to ignore disturbing phenomena such as the presence of air leaks in the premises, wind outside the premises, or a temperature difference between the interior of the premises and the exterior of the premises. Indeed, the ventilation system makes it possible to modulate the extraction flow rate in the main room according to information from a thermal environment identical or close to that of the main room.

[0061] More particularly, in the embodiment of the figure 2 , the single-flow ventilation system 10 is configured to allow the ventilation of premises 100 further comprising a third room 105. The third room 105 may comprise a third extraction vent 15.

[0062] The fan 16 can be connected to the first 12, second 14 and third 15 extraction vents to perform air extraction in the first 102, second 104 and third 105 rooms.

[0063] The single-flow ventilation system 10 may further comprise the third extraction vent 15 configured to be arranged in the third room 105. The third extraction vent 15 may be connected to the fan 16 by a second outlet duct 44. The single-flow ventilation system 10 may comprise the second outlet duct 44 configured to connect the third extraction vent 15 to the fan 16.

[0064] The first room 102 and the second room 104 may be main rooms, i.e. each comprising an air inlet opening 106 configured to connect an air flow external to the main room and an air flow internal to the main room. The third room 105 may be a technical room, i.e. without an air inlet opening. The third room 105 may comprise a third extraction vent 15.

[0065] THE figures 3 à 5 show that the extraction flow centralization device 18 may comprise a housing 45. The housing 45 may be in two parts configured to cooperate together, for example by complementarity of shape, so as to be able to access the internal elements of the housing 45.

[0066] The sensor 36 may be arranged in the housing 45. The first sensor and / or the second sensor may be arranged in the housing 45. The at least one sensor 36 may be arranged in the housing 45.

[0067] The air sampling means 33 may be at least partly arranged in the housing 45.

[0068] The extraction flow centralization device 18 may comprise a third air inlet 23. The third air inlet 23 may be configured to be connected to a third room of the plurality of rooms. In this way, a third extraction vent, configured to be arranged in a third room of the premises, may be connected to the extraction flow centralization device 18, for example via a third inlet duct 43. The extraction flow centralization device 18 may comprise a third means 31 for regulating the air flow circulating in the third air inlet 23. Thus, the extraction flow of the first, second and third rooms is modulated independently. The third regulating means 31 may be a valve for managing an air flow, circulating in the third air inlet 23. The third regulating means 31 may comprise a closing means 46, such as a shutter.The third regulating means 31 can be arranged in the third air inlet 23 of the extraction flow centralization device 18.

[0069] The air measuring means 32 may be arranged to carry out a measurement of the air in the first air inlet 20, a measurement of the air in the second air inlet 22, and a measurement of the air in the third air inlet 23.

[0070] The air measuring means 32 may comprise air sampling means 33 from the third air inlet 23.

[0071] The control device 34 can be configured to further control the third regulating means 31 of the air flow circulating in the third air inlet 23 according to information communicated by the air measuring means 32.

[0072] The sensor 36 may be configured to be placed in communication with the air of the first air inlet 20 or with the air of the second air inlet 22 or with the air of the third air inlet 23. The sensor 36 may be a common sensor configured to be placed in communication alternately with the air of the first air inlet 20, the air of the second air inlet 22 and the air of the third air inlet 23, for example via the air sampling means 33.

[0073] In addition to the common sensor, the air measuring means 32 may comprise the first sensor for measuring a significant magnitude of a ventilation requirement, configured to be placed in communication with the air of the first air inlet 20, the second sensor for measuring a significant magnitude of a ventilation requirement, configured to be placed in communication with the air of the second air inlet 22, and a third sensor for measuring a significant magnitude of a ventilation requirement, configured to be placed in communication with the air of the third air inlet 23. The third sensor 36 may be, for example, a CO2 and / or humidity and / or VOC and / or temperature sensor. The third sensor may be arranged in the extraction flow centralization device 18. The third sensor may be remote from the extraction flow centralization device 18.

[0074] The air measuring means 32 may comprise several sensors 36 of different nature, that is to say several types of sensors, for example a CO2 sensor and a humidity sensor. The selector may be configured to alternately put each type of sensor 36 into communication with the air of the first air inlet 20, the air of the second air inlet 22, and the air of the third air inlet 23.

[0075] Furthermore, the extraction flow centralization device 18 may comprise several air outlets 24 for connecting several outlet ducts 26. In this way, the extraction flow centralization device 18 may be connected to the fan 16 via several outlet ducts 26. The extraction flow centralization device 18 may comprise, for example, two or three air outlets 24.

[0076] In one embodiment, the extraction flow centralization device 18 may comprise three air inlets and three air outlets, so as to have a symmetrical extraction flow centralization device 18 which can be easily assembled.

[0077] The extraction flow centralization device 18 may comprise at least one plug 35 configured to cooperate with at least one of the air outlets 24, in place of an outlet duct 26. The sensor 36 may be arranged in the air outlet 24 comprising the plug 35. The first sensor and / or the second sensor and / or the third sensor may be arranged in the air outlet 24 comprising the plug 35. The at least one sensor 36 may be arranged in the air outlet 24 comprising the plug 35.

[0078] The extraction flow centralization device 18 may comprise a fastening device 37, such as brackets for fixing the extraction flow centralization device 18 to the ceiling of a room in the premises.

[0079] As shown by the figures 6 à 8 , the shutter means 46 is movable between an open position ( figure 6 ) and a closing position ( figure 7 ). The movable sealing means 46 makes it possible to regulate the air flow.

[0080] The closure means 46 may be associated with an actuator 48, such as a geared motor, configured to drive the closure means 46. The actuator 48 may be configured to drive the closure means 46 in rotation.

[0081] The actuator 48 may be configured to drive the closure means 46 between the open position and the closed position.

[0082] Actuator 48 may be a stepper geared motor.

[0083] The extraction flow centralization device 18 may comprise an electronic card (not shown) configured to receive information from the sensor 36 and to communicate with the control device 34 in order to control the first 28, second 30 and / or third 31 air flow regulation means.

[0084] As more precisely illustrated by the figures 9 à 14 , the air measuring means 32 may comprise a flow selector 38 configured to selectively connect the air from the first air inlet 20 or the air from the second air inlet 22 with the sensor 36. The flow selector 38 may be arranged in the extraction flow centralization device 18. The flow selector 38 may be remote from the extraction flow centralization device 18.

[0085] The flow selector 38 may be configured to provide a connection between the plurality of ventilation ducts 40, or a portion of the plurality of ventilation ducts 40, and the sensor 36. The air sampling means 33 form means for connecting the ventilation ducts 40, 42 to the flow selector 38.

[0086] The flow selector 38 may comprise inlet means E comprising a plurality of inlet orifices 3, 3', 3". The flow selector 38 may comprise outlet means S comprising a first outlet orifice 4.

[0087] The inlet means E may comprise, for example, two inlet orifices, including a first inlet orifice 3 and a second inlet orifice 3'. The inlet means E may comprise, for example, three inlet orifices, including the first inlet orifice 3, the second inlet orifice 3', and a third inlet orifice 3". The inlet means E may comprise at least two inlet orifices 3, 3'. The first inlet orifice 3 may be configured to be connected to the first air inlet 20. The second inlet orifice 3' may be configured to be connected to the second air inlet 22.

[0088] The first output port 4 can be configured to be connected to the sensor 36.

[0089] The flow selector 38 may comprise connecting means 2 of the inlet means E to the outlet means S. The connecting means 2 may be movable relative to the inlet means E. The connecting means 2 may be arranged to selectively connect one of the inlet ports of the plurality of inlet ports 3, 3', 3" to the first outlet port 4. Thus, a flow, such as an air flow, may flow from the inlet port connected to the first outlet port 4, to the first outlet port 4. The flow may flow from the inlet port 3, 3', 3" to the first outlet port 4, when the inlet port 3, 3', 3" is connected to the first outlet port 4. In this way, the inlet ports of the plurality of inlet ports 3, 3', 3" are selectively in a position connected to the first outlet port 4. outlet port 4, and in a free position.The connecting means 2 may be arranged to selectively connect one of the plurality of inlet ports 3, 3', 3" to the sensor 36. Thus, a flow, such as an air flow, may flow from the connected inlet port to the sensor 36, when the inlet port 3, 3', 3" is connected to the sensor 36. In this way, the inlet ports of the plurality of inlet ports 3, 3', 3" are selectively in a position connected to the sensor 36, and in a free position.

[0090] The connecting means 2 may be arranged to alternately or sequentially connect one of the plurality of inlet ports 3, 3', 3" to the first outlet port 4. In this way, the inlet ports of the plurality of inlet ports 3, 3', 3" are alternately or sequentially in a position connected to the first outlet port 4, and in a free position. The connecting means 2 may be arranged to alternately or sequentially connect one of the plurality of inlet ports 3, 3', 3" to the sensor 36. In this way, the inlet ports of the plurality of inlet ports 3, 3', 3" are alternately or sequentially in a position connected to the sensor 36, and in a free position.

[0091] The connection means 2 allow a fluid connection between an inlet orifice 3, 3', 3" and the first outlet orifice 4. The connection means 2 allow a fluid connection between an inlet orifice 3, 3', 3" and the sensor 36.

[0092] By free position is meant a position not connected to the first outlet port 4.

[0093] The connecting means 2 may be arranged to selectively connect either the first inlet orifice 3 to the first outlet orifice 4, or the second inlet orifice 3' to the first outlet orifice 4. Thus, a flow, such as an air flow, may flow from the first inlet orifice 3 to the first outlet orifice 4, or from the second inlet orifice 3' to the first outlet orifice 4. In this way, the first inlet orifice 3 is selectively in a position connected to the first outlet orifice 4, and in a free position; and the second inlet orifice 3' is selectively in a position connected to the first outlet orifice 4, and in a free position.

[0094] The connecting means 2 may comprise a first connecting chamber 5 arranged to selectively connect one of the inlet orifices of the plurality of inlet orifices 3, 3', 3" to the first outlet orifice 4. Thus, a flow, such as an air flow, may circulate in the first connecting chamber 5, from the inlet orifice connected to the first outlet orifice 4, to the first outlet orifice 4. The first connecting chamber 5 may be arranged to selectively connect either the first inlet orifice 3 to the first outlet orifice 4, or the second inlet orifice 3' to the first outlet orifice 4.

[0095] The first connecting chamber 5 can be sealed.

[0096] The flow selector 38 can be configured to selectively connect the air from the first air inlet 20 or the air from the second air inlet 22, with the sensor 36, via the air sampling means 33. The air sampling means 33 form means for connecting the first 20 and second 22 air inlets to the flow selector 38.

[0097] The first outlet 4 may be a single first outlet.

[0098] The flow selector 38 may comprise a part 1 forming a housing for the connection means 2. Part 1 may comprise the inlet means E. Part 1 may comprise the inlet orifices 3, 3', 3". Part 1 may have the inlet orifices 3, 3', 3". Part 1 and the inlet means E may form a single part. Part 1 and the inlet means E may form two assembled parts.

[0099] The connecting means 2 may be movable relative to the part 1. The connecting means 2 may be movable within the part 1. The connecting means 2 may be movable in rotation. The connecting means 2 may be movable at regular intervals.

[0100] The connecting means 2 may be cylindrical.

[0101] The flow selector 38 may comprise drive means 6, such as a motor, configured to drive the connection means 2. The drive means 6 may be configured to drive the connection means 2 so that the first connecting chamber 5 selectively connects one of the inlet ports 3, 3', 3" to the first outlet port 4. The drive means 6 may be configured to drive the connection means 2 so that the first connecting chamber 5 changes inlet ports 3, 3', 3" regularly, for example every 5 minutes.

[0102] The sensor 36 can be arranged downstream of the first outlet orifice 4, relative to the direction of circulation of the flow circulating from the inlet orifice connected to the first outlet orifice 4, towards the first outlet orifice 4. Thus, a single sensor 36 can be used for several rooms of the premises 100, so that the number of sensors 36 per ventilation system 10 is reduced. This makes it possible to reduce the costs associated with the sensors, but also to facilitate the installation of the sensors in the ventilation systems, as well as their maintenance.

[0103] The sensor 36 can be arranged in a housing 7 ( figure 12 ), so as to be in a closed volume. The housing 7 may be sealed. The flow selector 38 may comprise the housing 7 in which the sensor 36 is arranged. The first outlet orifice 4 may open into the housing 7.

[0104] More specifically, the figures 9 And 10illustrate a flow selector 38 according to a first embodiment of the invention.

[0105] As shown by the figures 9 And 10 , part 1 may comprise the outlet means S. The outlet means S may be arranged on part 1. Thus, part 1 may comprise the first outlet orifice 4. The first outlet orifice 4 may be arranged on part 1. Part 1 may have the first outlet orifice 4.

[0106] The outlet means S may comprise a second outlet orifice 4'. The second outlet orifice 4' may be configured to be connected to a suction source, such as the fan 16. The connection means 2 may comprise a second connecting chamber 8. The second connecting chamber 8 may be configured to connect the inlet orifices in the free position, with the second outlet orifice 4'. The second outlet orifice 4' may be a draining means configured to ensure that a flow circulates in each free inlet orifice. Thus, the flow will be immediately available when connecting the inlet orifice to the first outlet orifice 4. The second connecting chamber 8 may be sealed.

[0107] Part 1 may have a hollow cylinder shape comprising a longitudinal wall 1A, a solid end 1B and a hollow end 1C opposite the solid end 1B. The hollow end 1C of the part 1 may be arranged to form an insertion end for the connecting means 2. The inlet means E may be arranged on the solid end 1B of the part 1. The solid end 1B of the part 1 may comprise the inlet means E. The solid end 1B of the part 1 may have the inlet orifices 3, 3', 3". The outlet means S may be arranged on the solid end 1B of the part 1. The solid end 1B of the part 1 may comprise the outlet means S. The first outlet orifice 4 may be arranged on the solid end 1B of the part 1. The solid end 1B of the part 1 may have the first outlet orifice 4. The first outlet orifice 4 may be arranged in the center of the solid end 1B of the part 1.The solid end 1B of the part 1 may have in its center the first outlet orifice 4. The inlet means E may be arranged on the periphery of the solid end 1B of the part 1. The solid end 1B of the part 1 may comprise on its periphery the inlet means E. The solid end 1B of the part 1 may have on its periphery the inlet orifices 3, 3', 3". The second outlet orifice 4' may be arranged on the periphery of the solid end 1B of the part 1. The solid end 1B of the part 1 may have on its periphery the second outlet orifice 4'.

[0108] The connecting means 2 may be complementary to the part 1. They may be configured to fit into the part 1. They may comprise a longitudinal wall 2A, a first end 2B and a second end 2C opposite the first end 2B of the connecting means 2. The first end 2B may be solid. The second end 2C may be hollow. The connecting means 2 may comprise an internal volume comprising the first connecting chamber 5. The internal volume of the connecting means 2 may further comprise the second connecting chamber 8.

[0109] The connecting means 2 may comprise an internal partition 5A, for example V-shaped. The internal partition 5A may delimit, with the longitudinal wall 2A and the first end 2B of the connecting means 2, an internal zone forming the first connecting chamber 5. The internal partition 5A may delimit, with the longitudinal wall 2A and the first end 2B of the connecting means 2, an external zone forming the second connecting chamber 8.

[0110] The first connecting chamber 5 can allow one of the peripheral inlet orifices 3, 3', 3" of the solid end 1B of the part 1 to be connected to the first central outlet orifice 4 of the solid end 1B of the part 1.

[0111] The second connecting chamber 8 can allow the inlet orifices in the free position, arranged on the periphery of the solid end 1B of the part 1, to be placed in communication with the second outlet orifice 4' arranged on the periphery of the solid end 1B of the part 1.

[0112] THE figures 11 And 12 illustrate a flow selector 38 according to a second embodiment of the invention.

[0113] As shown by the figures 11 And 12 , the outlet means S can be arranged on the connection means 2. The first outlet orifice 4 can be arranged on the connection means 2.

[0114] The part 1 may have a hollow cylinder shape comprising a longitudinal wall 1A, a solid end 1B and a hollow end 1C opposite the solid end 1B. The hollow end 1C of the part 1 may be arranged to form an insertion end for the connection means 2. The inlet means E may be arranged on the longitudinal wall 1A of the part 1, for example circumferentially aligned (circumferentially distributed). The outlet means S may be arranged on the solid end 1B of the part 1. The first outlet orifice 4 may be arranged on the solid end 1B of the part 1. The first outlet orifice 4 may be arranged in the center of the solid end 1B of the part 1.

[0115] The connecting means 2 may be configured to fit into the part 1. They may comprise a longitudinal wall 2A, a first end 2B and a second end 2C opposite the first end 2B. The first end 2B may be solid. The second end 2C may be solid. The second end 2C may have a lumen 5B. The connecting means 2 may comprise an internal volume comprising the first connecting chamber 5. The longitudinal wall 2A of the connecting means 2 may define the first connecting chamber 5 in the form of a connecting channel. The longitudinal wall 2A of the connecting means 2 may comprise an opening 5C. The opening 5C may form an inlet of the first connecting chamber 5. The light 5B may form an outlet of the first connecting chamber 5. The opening 5B may be configured to cooperate with an inlet orifice 3, 3', 3" of the plurality of inlet orifices of the inlet means E.The lumen 5B may be configured to cooperate with the first outlet orifice 4. The second end 2C may comprise a longitudinal protrusion 2C' forming a portion of the first connecting chamber 5. The protrusion 2C' may have the lumen 5B at its distal end of the second end 2C. The protrusion 2C' may be configured to project from the part 1, for example projecting from the solid end 1B of the part 1. The protrusion 2C' may project from the part 1, for example projecting from the solid end 1B of the part 1. The protrusion 2C' may pass through the first outlet orifice 4. The first connecting chamber 5 may have an L shape.

[0116] The first connecting chamber 5 can make it possible to put one of the inlet orifices 3, 3', 3" arranged on the longitudinal wall 1A of the part 1, for example aligned circumferentially (distributed circumferentially) on the longitudinal wall 1A of the part 1, into communication with the first outlet orifice 4 arranged in the center of the solid end 1B of the part 1.

[0117] THE figures 13 And 14 illustrate a flow selector 38 according to a third embodiment of the invention.

[0118] As shown by the figures 13 And 14 , the outlet means S can be arranged on the connection means 2. The first outlet orifice 4 can be arranged on the connection means 2.

[0119] Part 1 can form the housing 7 comprising the sensor 36.

[0120] The part 1 may have the shape of a hollow parallelepiped comprising a first face 1A, and a second face 1B opposite the first face 1A. The part 1 may be arranged to form a housing for the connection means 2. The input means E may be arranged on the first face 1A of the part 1, for example aligned on a circle (distributed on a circle).

[0121] The connecting means 2 may be complementary to the part. They may be configured to fit into the part 1. They may comprise a longitudinal wall 2A, a first end 2B and a second end 2C opposite the first end 2B. The first end 2B may be solid. The second end 2C may comprise a lumen 5B. The lumen 5B may form the first outlet orifice 4. The connecting means 2 may comprise an internal volume comprising the first connecting chamber 5.

[0122] The connecting means 2 may comprise an internal partition 5A, for example in the shape of a cylinder. The internal partition 5A may delimit an internal zone forming the first connecting chamber 5.

[0123] The first connecting chamber 5 can allow one of the inlet orifices 3, 3', 3" arranged on the first face 1A of the part 1 to be placed in communication with the first outlet orifice 4 arranged on the connection means 2.

[0124] The operation of the stream selector 38 is now described.

[0125] The first inlet orifice 3 is connected to the first air inlet 20, for example via the sampling means 33. The second inlet orifice 3' is connected to the second air inlet 22, for example via the sampling means 33. Thus, a first incoming air flow circulates between the first air inlet 20 and the first inlet orifice 3, and a second incoming air flow circulates between the second air inlet 22 and the second inlet orifice 3'. The first outlet orifice 4 is connected to the sensor 36.

[0126] The drive means 6 are actuated to drive the connection means 2 so that the connection means 2, and more particularly the first connection chamber 5, selectively connect each inlet orifice 3, 3', 3" to the first outlet orifice 4 so that a flow circulates in the connection means 2, and more particularly in the first connection chamber 5, towards the sensor 36.

Claims

1. A single-flow ventilation system (10) for premises (100) comprising a plurality of rooms (102, 104), the single-flow ventilation system comprising: - A fan (16); - An extraction flow rate centralization device (18) comprising: ∘ a first air intake (20) configured to be connected to a first room (102) of the plurality of rooms, ∘ a second air intake (22) configured to be connected to a second room (104) of the plurality of rooms, and ∘ an air outlet (24) connected to the fan (16) by an outlet duct (26); - A first means (28) for regulating an air flow rate circulating in the first air intake (20); - A second means (30) for regulating an air flow rate circulating in the second air intake (22), - Air measuring means (32) arranged to perform a measurement of the air in the first air intake (20), and a measurement of the air in the second air intake (22); - A control device (34) configured to control the first means (28) for regulating the air flow rate circulating in the first air intake (20) according to information communicated by the air measuring means (32), and to control the second means (30) for regulating the air flow rate circulating in the second air intake (22) according to information communicated by the air measuring means (32), the air measuring means (32) comprising a sensor (36) for measuring a quantity indicative of a ventilation requirement, such as a CO2 and / or humidity and / or VOC sensor, the sensor (36) being configured to be communicated with the air of the first (20) or the second (22) air intake, characterized in that the sensor (36) is a common sensor configured to be communicated alternately with the air of the first air intake (20) and the air of the second air intake (22).

2. The single-flow ventilation system (10) according to claim 1, wherein the sensor (36) is integrated into the extraction flow rate centralization device (18).

3. The single-flow ventilation system (10) according to any one of claims 1 and 2, wherein the air measuring means (32) comprise a flow selector (38) configured to selectively communicate the air of the first air intake (20) or the air of the second air intake (22) with the sensor (36).

4. The single-flow ventilation system (10) according to the preceding claim, wherein the flow selector (38) comprises: - inlet means (E) comprising a plurality of inlet orifices (3, 3', 3") including a first inlet orifice (3) and a second inlet orifice (3'), the first inlet orifice (3) being configured to be connected to the first air intake (20), and the second inlet orifice (3') being configured to be connected to the second air intake (22); - outlet means (S) comprising a first outlet orifice (4) configured to be connected to the sensor (36); and - means (2) for linking the inlet means (E) to the outlet means (S), the linking means (2) being movable relative to the inlet means (E), and comprising a first connecting chamber (5) arranged to selectively connect one of the inlet orifices of the plurality of inlet orifices (3, 3', 3") to the first outlet orifice (4), so that a flow circulates from the inlet orifice connected to the first outlet orifice (4), towards the first outlet orifice (4).

5. The single-flow ventilation system (10) according to any one of the preceding claims, wherein the air measuring means (32) comprise air bleed means (33) in the first air intake (20) and in the second air intake (22).

6. The single-flow ventilation system (10) according to any one of the preceding claims, wherein the air measuring means (32) comprise means (39) for calibrating the measurement of the air of the first air intake (20), and the measurement of the second air intake (22), the calibration means (39) being arranged to perform an air measurement in a reference area, called a clean area, for example free of pollutant indicative of the ventilation requirement or including a negligible quantity of pollutant indicative of the ventilation requirement.

7. The single-flow ventilation system (10) according to any one of the preceding claims, wherein the first air flow rate regulation means (28) is disposed in the first air intake (20) of the extraction flow rate centralization device (18), and / or the second air flow rate regulation means (30) is disposed in the second air intake (22) of the extraction flow rate centralization device (18).

8. The single-flow ventilation system (10) according to any one of claims 1 to 6, comprising: - a first extraction opening (12) configured to be disposed in the first room (102), - a second extraction opening (14) configured to be disposed in the second room (104), - a first inlet duct (40) configured to connect the first extraction opening (12) to the extraction flow rate centralization device (18), and - a second inlet duct (42) configured to connect the second extraction opening (14) to the extraction flow rate centralization device (18), wherein the first regulation means (28) is disposed in the first inlet duct (40) of the single-flow ventilation system (10), and / or the second regulation means (30) is disposed in the second inlet duct (42) of the single-flow ventilation system (10).

9. The single-flow ventilation system (10) according to any one of the preceding claims, wherein the extraction flow rate centralization device (18) is offset from the fan (16).

10. The single-flow ventilation system (10) according to any one of the preceding claims, comprising pressure measuring means arranged to perform a measurement of the pressure in the extraction flow rate centralization device (18).

11. The single-flow ventilation system (10) according to any one of the preceding claims, wherein the first room (102) or the second room (104) is a so-called main room, comprising an air inlet aperture (106) allowing air movement from the outside to the inside of the main room.

12. The single-flow ventilation system (10) according to any one of claims 1 to 10, wherein the first room (102) and the second room (104) are so-called main rooms, comprising an air inlet aperture (106) allowing air movement from the outside to the inside of the main room.

13. The single-flow ventilation system (10) according to any one of the preceding claims, wherein the extraction flow rate centralization device (18) comprises at least one additional air intake (23) configured to be connected to an additional room of the plurality of rooms.

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