WO2025003589A1 - Système de traitement d'air pour véhicule automobile pourvu d'un filtre hepa - Google Patents
Système de traitement d'air pour véhicule automobile pourvu d'un filtre hepa Download PDFInfo
- Publication number
- WO2025003589A1 WO2025003589A1 PCT/FR2024/050722 FR2024050722W WO2025003589A1 WO 2025003589 A1 WO2025003589 A1 WO 2025003589A1 FR 2024050722 W FR2024050722 W FR 2024050722W WO 2025003589 A1 WO2025003589 A1 WO 2025003589A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- duct
- air
- outlet
- treatment system
- filtration
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00735—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models
- B60H1/00742—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models by detection of the vehicle occupants' presence; by detection of conditions relating to the body of occupants, e.g. using radiant heat detectors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00735—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models
- B60H1/00764—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models the input being a vehicle driving condition, e.g. speed
- B60H1/00778—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models the input being a vehicle driving condition, e.g. speed the input being a stationary vehicle position, e.g. parking or stopping
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
- B60H1/00821—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being ventilating, air admitting or air distributing devices
- B60H1/00828—Ventilators, e.g. speed control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
- B60H1/00821—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being ventilating, air admitting or air distributing devices
- B60H1/00835—Damper doors, e.g. position control
- B60H1/00849—Damper doors, e.g. position control for selectively commanding the induction of outside or inside air
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
- B60H1/00821—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being ventilating, air admitting or air distributing devices
- B60H1/00864—Ventilators and damper doors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H3/00—Other air-treating devices
- B60H3/06—Filtering
- B60H3/0608—Filter arrangements in the air stream
- B60H3/0625—Filter arrangements in the air stream with provisions for by-passing the filter element
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating devices
- B60H1/00007—Combined heating, ventilating, or cooling devices
- B60H1/00021—Air flow details of HVAC devices
- B60H2001/00078—Assembling, manufacturing or layout details
- B60H2001/00085—Assembling, manufacturing or layout details of air intake
Definitions
- the present invention relates generally to air treatment systems within the passenger compartment of motor vehicles.
- the invention relates in particular to such an air treatment system for a motor vehicle provided with a HEPA type air filter.
- a motor vehicle includes an air treatment system within the passenger compartment of the vehicle in order to ensure passenger comfort.
- HVAC Heating, Ventilation and Air-Conditioning in English
- such an air treatment system typically includes:
- the HVAC air treatment system also includes a motor-fan unit and at least one first air filter housed in the diffusion duct, these two elements generally being integrated into an HVAC module located under the dashboard of the vehicle.
- Such an HVAC air treatment system further comprises an air flow control flap arranged at the interface between the outlet of the outside air intake duct, the outlet of the recirculation duct and the inlet of the diffusion duct.
- This control flap is movable between an open position in which said exterior air intake and diffusion ducts are fluidically connected so that the pulsed air entering the passenger compartment comes only from outside the vehicle, and a closed position in which said recirculation and diffusion ducts are fluidically connected so that the pulsed air entering the passenger compartment is only recycled air.
- This air flow control flap can generally be controlled either manually by the driver or front passenger via mechanical or tactile control devices, or automatically via the HVAC air treatment system supervision module.
- Such a HEPA filter is capable of filtering at least 99.95% of fine particles, invisible to the naked eye, with a diameter greater than or equal to 0.3 micrometers (pm).
- HVAC module comprising:
- a housing defining an air inlet and an air outlet connected by an air duct, this air inlet being able to be fluidically connected selectively to an exterior air intake duct and to a passenger compartment air recirculation duct;
- an air flow control flap positioned in the housing and capable of being selectively actuated to connect the air passage to a bypass duct further defined by the housing.
- the bypass duct has an inlet located at the flap and opening into the air duct downstream of the first air filter and upstream of the second HEPA air filter. This bypass duct further has a outlet opening into the bypass line downstream of the second HEPA air filter.
- the air flow passes either only through the first air filter, or successively through this first air filter and the second HEPA filter.
- the present invention therefore aims to improve the situation.
- an air treatment system for a motor vehicle comprising an outside air intake duct, a passenger compartment air recirculation duct, a diffusion duct opening into the passenger compartment of said vehicle and housing a motor-fan unit and a first air filter; characterized in that it also comprises:
- a two-way circulation filtration duct housing a second HEPA-type air filter and extending between the outlet of said intake duct and the outlet of said recirculation duct,
- a second air flow control flap arranged at the interface between the outlet of said recirculation duct, the second inlet/outlet of said filtration duct and the inlet of said second bypass duct.
- the air treatment system according to the invention thus makes it possible to control the path of the air flow (external or recycled) according to different configurations. such that it can selectively pass either through only the first air filter bypassing the second HEPA air filter, or successively pass through this second HEPA air filter and this first air filter.
- said first control flap is movable between:
- the air treatment system according to the invention is advantageously capable of operating in a first mode in which:
- said first control flap occupies its first position so that the pulsed air, entering the passenger compartment and coming only from outside the vehicle, circulates successively in said intake duct, said first bypass duct and said diffusion duct, passing only through said first air filter, and
- This first operating mode is for example configured to activate automatically in the presence of at least one passenger in the vehicle and when the temperature in the passenger compartment is higher than a predetermined threshold temperature.
- the air treatment system according to the invention is also advantageously capable of operating in a second mode in which:
- said first control flap occupies its second position and where said second control flap occupies its first position, such that the pulsed air, entering the passenger compartment and coming only from outside the vehicle, circulates successively in said intake duct, said filtration duct, said second bypass duct and said diffusion duct, successively passing through said second HEPA air filter and said first air filter;
- This second operating mode is, for example, configured to activate automatically in the absence of a passenger in the vehicle and when the temperature in the passenger compartment is above a predetermined threshold temperature.
- the face of this second HEPA air filter crossed first by the air flow in said second operating mode is covered with an antistatic pre-filter.
- the air treatment system according to the invention is further advantageously capable of operating in a third mode in which said first control flap occupies its third position and said second control flap occupies its second position, such that the pulsed air, entering the passenger compartment and consisting solely of recycled air, circulates successively in said recirculation duct, said filtration duct, said first bypass duct and said diffusion duct, successively passing through said second HEPA air filter and said first air filter.
- This third operating mode is for example configured to activate automatically in the presence of at least one passenger in the vehicle and when the temperature in the passenger compartment is less than or equal to a predetermined threshold temperature.
- the invention also aims, under a second aspect, at a motor vehicle comprising such an air treatment system.
- FIG. 1 represents a schematic view of an HVAC air treatment system according to the invention for a motor vehicle
- FIG. 1 is a view of the HVAC air treatment system according to the invention in a configuration corresponding to its first mode of operation;
- FIG. 3 represents a view of the HVAC air treatment system according to the invention in a configuration corresponding to its second mode of operation
- FIG 4 is a view of the HVAC air treatment system according to the invention in a configuration corresponding to its third operating mode.
- the HVAC air treatment system 1 comprises:
- this diffusion duct 4 housing a motor-fan unit 5 as well as a first air filter 6;
- the first air filter 6 is advantageously constituted by a high efficiency (HE) filter making it possible to filter gaseous pollutants such as volatile organic compounds (VOCs), dust and fine particles such as those with an average diameter of 2.5 pm (PM 2.5) and those with an average diameter of 9 pm (PM 9).
- HE high efficiency
- This first air filter 6 can also be made up of a simple pollen filter, an activated carbon filter for filtering and neutralizing odors, or a biocide filter ensuring more effective filtering of allergens.
- This filter 6 can also be made up of a plurality of layers, each layer performing the function of one of the filters defined above.
- the second HEPA 8 type air filter is advantageously of class H13 so as to ensure the filtering of at least 99.95% of fine particles, invisible to the naked eye, with a diameter greater than or equal to 0.3 micrometers (pm).
- this second HEPA 8 filter can be of an even more efficient class (for example, of class H14 ensuring the filtering of at least 99.995% of fine particles, invisible to the naked eye, with a diameter greater than or equal to 0.3 micrometers).
- This second HEPA filter 8 is also advantageously installed in the engine compartment of the vehicle located under the front hood, so that the passenger compartment air recirculation ducts 3 and the bypass ducts 9, 10 pass through the vehicle bulkhead separating the engine compartment and the passenger compartment, this bulkhead being schematically represented in this figure 1 by the broken line T.
- the HVAC air treatment system 1 also comprises a first air flow control flap 11, arranged at the interface between the outlet of the intake duct 2, a first inlet/outlet of the filtration duct 7 and the inlet of the first bypass duct 9.
- This first control flap 11 is movable via a motorized actuator not shown between:
- the HVAC air treatment system 1 further comprises a second air flow control flap 12, arranged at the interface between the outlet of the recirculation duct 3, the second inlet/outlet of the filtration duct 7 and the inlet of the second bypass duct 10.
- This second control flap 12 is movable via a motorized actuator not shown between:
- the HVAC air treatment system 1 also includes a supervision module (not shown) capable of managing, autonomously or according to control orders transmitted by the vehicle passengers, the operation of the motor-fan unit 5 in order to adapt the flow of pulsed air leaving the latter as well as the operation of the first and second air flow control flaps 11, 12.
- a supervision module capable of managing, autonomously or according to control orders transmitted by the vehicle passengers, the operation of the motor-fan unit 5 in order to adapt the flow of pulsed air leaving the latter as well as the operation of the first and second air flow control flaps 11, 12.
- this supervision module includes a computer having one or more interconnected microprocessors, and a memory module comprising non-volatile and non-volatile memory.
- This supervision module is capable of operating the HVAC 1 air treatment system of the vehicle in a first mode called
- the first air flow control flap 11 occupies its first position so that the pulsed air, entering the passenger compartment H and coming only from the exterior E of the vehicle, circulates successively in the exterior air intake duct 2, the first bypass duct 9 and the diffusion duct 4, passing only through the first air filter 6, and
- the motor-fan unit 5 operates at its maximum electrical power.
- This first operating mode may for example be configured to activate automatically in the presence of at least one passenger in the vehicle and when the temperature in the passenger compartment H is higher than a predetermined threshold temperature (for example between 35 and 40°C). It may also be envisaged that this first operating mode may be activated manually by a passenger in the vehicle.
- a predetermined threshold temperature for example between 35 and 40°C.
- the second HEPA filter 8 is therefore bypassed when this first operating mode is activated (the entire air flow passing through the first bypass duct 9 which offers no resistance to the passage of air unlike the filtration duct 7), so that the pressure losses are contained and a sufficient air flow rate at the passenger compartment inlet (approximately 500 kg/h) can be obtained without oversizing the motor-fan unit 5 (and therefore with limited electrical consumption as well as reduced operating cost and noise).
- the second air flow control flap 12 advantageously occupies its first position in which the outlet of the recirculation duct 3 is blocked, so as to reduce the intensity of the parasitic noise generated in the passenger compartment H.
- the supervision module is also capable of operating the vehicle's air treatment HVAC system 1 in a second mode called “preconditioning” illustrated in FIG. 3, in which: - the first air flow control flap 11 occupies its second position and where the second air flow control flap 12 occupies its first position, such that the pulsed air, entering the passenger compartment H and coming only from the exterior E of the vehicle, circulates successively in the exterior air intake duct 2, the filtration duct 7, the second bypass duct 10 and the diffusion duct 4, successively passing through the second HEPA air filter 8 and the first air filter 6; and
- the motor-fan unit 5 operates at its maximum electrical power.
- This second operating mode may for example be configured to activate automatically in the absence of a passenger in the vehicle and when the temperature in the passenger compartment H is higher than a predetermined threshold temperature (advantageously the same as that associated with the triggering of the first operating mode called “rapid cooling”, so that the two modes follow one another automatically). It is also possible to envisage that this second operating mode may be activated manually by a passenger in the vehicle.
- This second operating mode thus makes it possible to cool the passenger compartment H before passengers enter the vehicle while maintaining optimal filtration quality.
- the supervision module is further capable of operating the vehicle's HVAC air treatment system 1 in a third mode called
- thermo convergence illustrated by Figure 4, in which the first air flow control flap 11 occupies its third position and where the second air flow control flap 12 occupies its second position, so that the pulsed air, entering the passenger compartment H and consisting only of recycled air, circulates successively in the recirculation duct 3, the filtration duct 7 (the air flow circulating therein in the opposite direction to that in the second operating mode), the first bypass duct 9 and the diffusion duct 4, successively passing through the second HEPA air filter 8 and the first air filter 6.
- This third operating mode intended to converge the temperature in the passenger compartment H towards a predefined set temperature, can for example be configured to activate automatically in the presence of at least one passenger in the vehicle and when the temperature in the passenger compartment H is less than or equal to a predetermined threshold temperature (advantageously the same as that associated with the triggering of the first operating mode called “rapid cooling”, so that the two modes follow one another automatically). It is also possible to envisage that this third operating mode can be activated manually by a passenger in the vehicle.
- This third operating mode also ensures optimum filtration quality. Since the differential between the interior temperature of the passenger compartment H and the set temperature is less than in the first operating mode, the reduction in the air flow rate at the passenger compartment inlet caused by the greater pressure losses generated by the passage through this second HEPA 8 air filter is no longer problematic.
- this second HEPA air filter 8 crossed first by the air flow in the second operating mode called “preconditioning” is covered with an antistatic pre-filter 8A intended to retain the largest part of the particles sucked in from the outside air, so as to prevent this HEPA filter 8 from becoming saturated or obstructed too quickly.
- the supervision module will advantageously be configured so as to gradually reduce the electrical power of the motor-fan unit 5 as the differential between the temperature inside the passenger compartment H and the outside temperature decreases.
- the present invention is not limited to the embodiments described and shown, but also encompasses all variant embodiments within the reach of those skilled in the art, i
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Air-Conditioning For Vehicles (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP24734952.5A EP4735280A1 (fr) | 2023-06-29 | 2024-06-05 | Système de traitement d'air pour véhicule automobile pourvu d'un filtre hepa |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FRFR2306877 | 2023-06-29 | ||
| FR2306877A FR3150573B1 (fr) | 2023-06-29 | 2023-06-29 | Système de traitement d’air pour véhicule automobile pourvu d’un filtre HEPA |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2025003589A1 true WO2025003589A1 (fr) | 2025-01-02 |
Family
ID=88069030
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR2024/050722 Ceased WO2025003589A1 (fr) | 2023-06-29 | 2024-06-05 | Système de traitement d'air pour véhicule automobile pourvu d'un filtre hepa |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4735280A1 (fr) |
| FR (1) | FR3150573B1 (fr) |
| WO (1) | WO2025003589A1 (fr) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2306877A1 (fr) | 1975-04-11 | 1976-11-05 | Aerospatiale | Dispositif de securite contre la decompression brutale des soutes d'aeronefs |
| DE102008042856A1 (de) * | 2008-10-15 | 2010-04-22 | Ford Global Technologies, LLC, Dearborn | Kraftfahrzeug-Belüftungssystem |
| FR3062604A1 (fr) * | 2017-02-08 | 2018-08-10 | Renault S.A.S. | Systeme de chauffage/climatisation dote d'un dispositif de traitement d'air performant |
| US10525395B2 (en) | 2015-08-26 | 2020-01-07 | Tesla, Inc. | Vehicle air system with high efficiency filter |
| US20200376934A1 (en) | 2019-05-31 | 2020-12-03 | GM Global Technology Operations LLC | Vehicle air filtration system |
| EP4260944A1 (fr) * | 2022-04-13 | 2023-10-18 | MANN+HUMMEL GmbH | Système de filtre à air de cabine pour un véhicule et procédé d'épuration de l'air devant être fourni à une cabine |
-
2023
- 2023-06-29 FR FR2306877A patent/FR3150573B1/fr active Active
-
2024
- 2024-06-05 EP EP24734952.5A patent/EP4735280A1/fr active Pending
- 2024-06-05 WO PCT/FR2024/050722 patent/WO2025003589A1/fr not_active Ceased
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2306877A1 (fr) | 1975-04-11 | 1976-11-05 | Aerospatiale | Dispositif de securite contre la decompression brutale des soutes d'aeronefs |
| DE102008042856A1 (de) * | 2008-10-15 | 2010-04-22 | Ford Global Technologies, LLC, Dearborn | Kraftfahrzeug-Belüftungssystem |
| US10525395B2 (en) | 2015-08-26 | 2020-01-07 | Tesla, Inc. | Vehicle air system with high efficiency filter |
| FR3062604A1 (fr) * | 2017-02-08 | 2018-08-10 | Renault S.A.S. | Systeme de chauffage/climatisation dote d'un dispositif de traitement d'air performant |
| US20200376934A1 (en) | 2019-05-31 | 2020-12-03 | GM Global Technology Operations LLC | Vehicle air filtration system |
| EP4260944A1 (fr) * | 2022-04-13 | 2023-10-18 | MANN+HUMMEL GmbH | Système de filtre à air de cabine pour un véhicule et procédé d'épuration de l'air devant être fourni à une cabine |
Also Published As
| Publication number | Publication date |
|---|---|
| FR3150573A1 (fr) | 2025-01-03 |
| EP4735280A1 (fr) | 2026-05-06 |
| FR3150573B1 (fr) | 2026-01-16 |
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