Air conditioning unit for a vehicle

Abstract

Title: Air conditioning unit for a vehicle. The invention relates to an air conditioning unit (100) for a vehicle, in particular for a motor vehicle, comprising, on the one hand, an air conditioning system (200) and, on the other hand, an air handling module (1), the air handling module (1) comprising: an air inlet (2) configured to be supplied, in operation, at least partially by interior air drawn from a predetermined enclosure (50) such as a vehicle passenger compartment; a capture device configured to capture CO2 contained in the air passing through the air handling module (1); a dehumidification device for the air passing through the air handling module (1); a treated air outlet (3) configured to deliver air treated by the air handling module (1) to the air conditioning system (200). Figure for the abstract: Fig. 1

Description

Title of the invention: Air conditioning unit for a vehicle

[0001] The invention relates to an air conditioning unit for a vehicle, in particular for a motor vehicle.

[0002] Nowadays, the search for energy savings in vehicle thermal comfort systems tends to favor air recirculation modes (thus avoiding the use of fresh air from outside the vehicle). However, this can lead to certain safety problems due to increased humidity inside the vehicle (especially in cold weather) with the formation of fog on the windshield, causing visibility problems. Furthermore, a high rate of air recirculation can cause an increase in CO2 concentration in the passenger compartment that can exceed 2000 ppm, a level that induces drowsiness.

[0003] In particular, there is a need to remedy the above problems.

[0004] The invention thus relates to an air conditioning system for a vehicle, in particular for a motor vehicle, comprising, on the one hand, an air conditioning system for a predetermined enclosure such as a vehicle passenger compartment and, on the other hand, an air handling module, the air handling module comprising: - an air inlet configured to be supplied, in operation, at least in part by indoor air taken from the predetermined enclosure; - a capture device configured to capture CO2 contained in the air passing through the air treatment module; - an air dehumidification device that passes through the air treatment module; - a treated air outlet configured to deliver air treated by the air handling module to the air conditioning system.

[0005] According to one aspect of the invention, the dehumidification device is devoid of an evaporator-type heat exchanger. The dehumidification device includes, in particular, a desiccant, for example a desiccant wheel, or any other type of means known for dehumidifying air.

[0006] According to one aspect of the invention, the maximum air treatment flow rate by the air conditioning system is for example between 400 and 600 m3 / h, in particular between 450 m3 / h and 550 m3 / h, for example 500 m3 / h.

[0007] According to one aspect of the invention, the air handling module is sized so that the maximum air flow treated in the air handling module is less than the maximum air flow treated in the air conditioning system.

[0008] According to one aspect of the invention, the air conditioning system is devoid of a fresh air inlet.

[0009] According to one aspect of the invention, the air conditioning unit is devoid of a fresh air inlet.

[0010] "Fresh air" refers to air coming in particular from outside the vehicle.

[0011] The present invention allows operation without using fresh air, by using air recirculation from only the passenger compartment (also called 100% air recirculation mode).

[0012] The invention is advantageous in that the sizing of the air handling module provides a treatment capacity that corresponds to only a portion, namely strictly less than 100%, of the maximum airflow treated by the air conditioning system, in particular less than 70%, especially less than 50%, for example less than 40%. The air handling module can thus have a reduced footprint. The lower the proportion of the airflow treated, the smaller the footprint of the handling module can be. The inventors observed satisfactory results in terms of the size / air quality trade-off with a proportion of the treated airflow (relative to the maximum airflow of the air conditioning system) between 25% and 60%, in particular between 30% and 50%. This differs from the case where an air handling module would be considered that delivers 100% of the air volume used by the air conditioning system.In this case, the air treatment module would need to have greater capacities and therefore a larger footprint, with a higher cost as well.

[0013] In the invention, it has been found that dehumidifying only a part of the air that passes through the air conditioning system is sufficient to perform the windshield defogging function usually performed by the air conditioning system.

[0014] The invention thus makes it possible to eliminate the need for the fresh air intake demisting function of the air conditioning system. This notably reduces the electrical consumption of the air conditioning system.

[0015] In summary, the 100% air recirculation provided by the air conditioning system according to the invention makes it possible to eliminate CO2 and humidity from the air. If necessary, only a portion of the airflow required for thermal comfort needs to be treated (for example: 180 m³ / h), thus ensuring the removal of water and the treatment of CO2.

[0016] According to one aspect of the invention, the air handling module is sized to deliver treated air in a proportion at least twice as small as the treatment capacity of the air conditioning system; in other words, in a proportion less than half the treatment capacity of the air conditioning system.

[0017] Advantageously, the air treatment module is configured to deliver treated air with a flow rate of 180 m³ / hour (generally a flow rate which can be chosen between 125 and 300 m3 / h, in particular between 150m3 / h and 250m3 / h), for a treatment capacity by the air conditioning system which is 500 m3 / hour.

[0018] According to one aspect of the invention, the air treatment module is configured to be able to treat air coming only from the predetermined enclosure (for example the passenger compartment).

[0019] According to one aspect of the invention, the air conditioning unit is configured to be able to process air coming only from the predetermined enclosure (for example, the passenger compartment).

[0020] According to one aspect of the invention, the air conditioning assembly is configured so that the air conditioning system receives an air mixture coming only from: - the enclosure, directly, in other words without treatment; - the treatment module.

[0021] The invention makes it possible, in particular, thanks to this air treatment module, to dehumidify the air without using an evaporator in the air conditioning system. For example, the air conditioning system can operate without an evaporator when it delivers hot air (heating mode), thus reducing the cost of such a system, which can be of a simpler design. In other words, the air conditioning system can be exempt from the air dehumidification function when it is in heating mode. That is to say, the dehumidification of the air passing through the air conditioning system can be carried out entirely by the treatment module in heating mode.

[0022] If the air conditioning system includes a refrigerant exchanger of the evaporator type, this can be used as an evaporator, but only in air conditioning mode, to cool the passenger compartment (i.e., not in dehumidification mode, nor in heating mode).

[0023] According to a first variant, the air conditioning system can use a single exchanger operating either in evaporator mode to produce cold (air conditioning mode), or in condenser mode to produce heat (heating mode).

[0024] According to a second variant, the air conditioning system includes an evaporator and a condenser, the evaporator being used only in cold mode (air conditioning mode) to cool the passenger compartment (and not to dehumidify the air in hot mode or heating mode).

[0025] According to one aspect of the invention, the treated air outlet of the air treatment module is configured to be placed opposite an air inlet of the air conditioning system.

[0026] According to one aspect of the invention, the treated air outlet of the air treatment module has a smaller cross-section than the cross-section of the air inlet of the air conditioning system.

[0027] This allows the air conditioning system to draw not only air from the air treatment module but also air taken directly from the passenger compartment (and therefore not treated by the air treatment module).

[0028] According to one aspect of the invention, the air outlet of the air handling module is configured to be located at a non-zero distance from the air inlet of the air conditioning system.

[0029] Thus, it is not necessary to physically connect the air outlet of the air treatment module to the air conditioning system.

[0030] Alternatively, the air outlet of the air handling module is connected to the air conditioning system.

[0031] According to one aspect of the invention, the air handling module includes a motor-fan unit (or “Blower” in English), in particular of axial type, to force air circulation within the air handling module.

[0032] According to one aspect of the invention, the motor-fan group is provided in addition to a main motor-fan group, in particular of axial or centrifugal-axial type, which equips the ventilation system.

[0033] Alternatively, the air handling module is without a motor-fan unit.

[0034] According to one aspect of the invention, the air outlet of the air handling module is placed opposite the inlet of a motor-fan unit belonging to the air conditioning system.

[0035] According to one aspect of the invention, the motor-fan group of the air conditioning system can be of axial or centrifugal-axial type.

[0036] In the invention, the airflow coming out of the air treatment module is calibrated using, for example, one or more flaps which regulate the passage of air coming out of the air treatment module.

[0037] Thus the air treatment module can be equipped with one or more flaps which regulate the passage of air at the outlet of the air treatment module.

[0038] According to one aspect of the invention, the capture device configured to capture CO2 contained in the air passing through the treatment module is configured to adsorb the CO2.

[0039] According to one aspect of the invention, the CO2 capture device comprises an activated carbon and / or metallo-organic structure filter.

[0040] Other means of capturing gases, in particular polluting gases, may be provided in the air treatment module.

[0041] According to one aspect of the invention, the air treatment module comprises one or more particle filters.

[0042] For example, the air treatment module includes a high-efficiency air filter, in particular called a HEPA filter in English (for High Efficiency Particulate Air).

[0043] According to one aspect of the invention, the air treatment module may include a vacuum pump or an air pump or a motor-fan unit (or any other suitable means) for forcing air to pass through the dehumidification device.

[0044] If dehumidification is required, the flow rate through the air treatment module is chosen to be between 180 and 250 m3 / hour.

[0045] According to one aspect of the invention, the air treatment module forms an autonomous module independent of the air conditioning system.

[0046] The air treatment module allows, for example, the adsorption and / or absorption of substances such as CO2 and H2O (in vapor form in particular), and also nitrogen oxides (NOx) and / or volatile organic compounds.

[0047] According to one aspect of the invention, the air conditioning system comprises a single heat exchanger, for example, an evaporator-condenser. The evaporator-condenser is configured to operate as an evaporator in "summer" mode (in warm weather, i.e., air conditioning mode) and as a condenser in "winter" mode (in cold weather, i.e., heating mode). For example, in warm weather (or air conditioning mode), dehumidification is performed by the evaporator-condenser (in evaporator mode) of the air conditioning system, whereas in cold weather (or heating mode), dehumidification is provided by the air handling unit and not by the evaporator-condenser, which then operates as a condenser.In other words, the invention allows for a single heat exchanger in the air conditioning (or HVAC) system: in "summer" mode, this heat exchanger performs an evaporation function (air conditioning mode), and in "winter" mode, this heat exchanger performs a heating function (heating mode). The invention thus eliminates the need for two successive heat exchangers used between the air conditioning and heating modes (namely, an evaporator to dehumidify and / or cool the air, followed by a heater to warm the air to the desired temperature).

[0048] According to one aspect of the invention, the air conditioning unit is configured to be able to dehumidify the air in the passenger compartment by means of an evaporator of the air conditioning system, in "summer" mode (i.e., in air conditioning mode).

[0049] Thus, in this case, the air treatment module is not used at all or not used alone to dehumidify the air in the passenger compartment. If desired, the module of The treatment can be used in "summer" mode in addition to the evaporator of the air conditioning system.

[0050] In other words, the air conditioning system is configured to be able to deactivate or bypass the air handling module when the air handling module is not used to dehumidify the passenger compartment air. If the air handling module is not used to dehumidify the air, it is configured to allow air to pass through. To this end, the air handling module is configured to be able to be deactivated to allow air to pass through, thus enabling the flow rate necessary for comfort, and simultaneously allowing CO2 treatment.

[0051] According to one aspect of the invention, the air conditioning assembly includes a control unit configured to control the type of air to be sent into the air conditioning system, the type of air being chosen in particular from air treated by the air treatment module, air coming directly from the predetermined enclosure such as a passenger compartment, or a mixture of the two.

[0052] According to one aspect of the invention, the control unit is configured to control a flap which, depending on its angular position, modifies the treated / untreated air ratio to be sent into the air conditioning system.

[0053] The invention further relates to an air treatment method using an air conditioning unit comprising an air conditioning system and an air treatment module as described above, the method comprising the following step: - deliver air treated by the air treatment module, which represents only a part of the maximum treatment flow rate by the air conditioning system.

[0054] The invention further relates to an air treatment module comprising: - an air inlet configured to be supplied, in operation, at least in part by indoor air taken from a predetermined enclosure such as a vehicle cabin; - a capture device configured to capture CO2 contained in the air passing through the air treatment module; - a device for dehumidifying the air that passes through the treatment module; - a treated air outlet configured to deliver air treated by the capture device and the dehumidification device to an air conditioning system of the predetermined enclosure, the air handling module being sized so that the maximum air flow treated in the air handling module is less than the maximum air flow treated by the air conditioning system.

[0055] The air handling module can be stand-alone, or be a module combined with the air conditioning (HVAC) system.

[0056] In the case of a self-contained air handling module, a motor-fan unit may be provided.

[0057] In the case of a module combined with the air conditioning (HVAC) system, an actuator and a flap / flaps are provided to manage the airflow required for the air intake of the air conditioning (HVAC) system in order to ensure that a sufficient portion of the recycled air passes through the air handling module.

[0058] Other features, details and advantages of the invention will become clearer upon reading the following description on the one hand, and several illustrative and non-limiting examples of embodiments given with reference to the accompanying schematic drawings on the other hand, in which:

[0059] [Fig-1] Fig. 1 is a schematic, perspective view of a set of air conditioning for a vehicle according to an example of an embodiment of the invention;

[0060] [Fig.2] Fig.2 is a perspective diagram of the air conditioning system of the [Fig.l], according to a different view;

[0061] [Fig. 3] [Fig. 3] is a schematic representation of the air conditioning assembly of the [Fig.1], illustrating the air paths;

[0062] [Fig.4] Fig.4 is a schematic representation of an alternative embodiment of the [Fig.3];

[0063] [Fig. 5] Fig. 5 is a schematic representation of another variant of realization of [Fig.3];

[0064] [Fig.6] Fig.6 is a schematic representation of another variant of realization of [Fig.3].

[0065] The features, variants, and different embodiments of the invention can be combined in various ways, provided they are not incompatible or mutually exclusive. In particular, variants of the invention may be conceived comprising only a selection of features, described hereafter in isolation from the other described features, if this selection of features is sufficient to confer a technical advantage and / or to differentiate the invention from the prior art.

[0066] Figures 1 and 2 show an air conditioning unit 100 for a motor vehicle, comprising, on the one hand, an air conditioning system 200 also called HVAC and, on the other hand, an air handling module 1.

[0067] The air handling module 1 comprises: - a body 10 substantially tubular, here made in two parts 11 and 12 which are assembled one after the other in the direction of the airflow; - an air inlet 2 configured to be supplied, in operation, at least in part by interior air taken from a predetermined enclosure 50, here a passenger compartment of the vehicle; - a capture device 4 (shown in [Fig.3]) configured to capture CO2 contained in the air passing through the air treatment module; - an air dehumidification device 5 (shown in [Fig.3]) which passes through the air treatment module; - a treated air outlet 3 configured to deliver air treated by the air handling module to the air conditioning system.

[0068] The CO2 capture device 4 and the air dehumidification device 5 are placed inside the body 10, one after the other, so that the air flowing into the body 10 passes successively through the CO2 capture device 4 and then the air dehumidification device 5. In another embodiment of the invention, it is possible to have first the air dehumidification device 5 and then the CO2 capture device 4.

[0069] The dehumidification device 5 does not have an evaporator-type heat exchanger. The dehumidification device 5 here includes a desiccant, for example a desiccant wheel, or any other known means of air dehumidification.

[0070] The maximum air treatment flow rate by the air conditioning system 200 is for example between 400 and 600 m3 / h, in particular between 450 m3 / h and 550 m3 / h, for example 500 m3 / h.

[0071] The air handling module 1 is sized so that the maximum air flow treated in the air handling module 1 is less than the maximum air flow treated in the air conditioning system 200.

[0072] The air conditioning unit 100 and the air conditioning system 200 are, where applicable, without fresh air inlets.

[0073] Air coming from outside the vehicle is called "fresh air".

[0074] The invention is advantageous in that the sizing of the air handling module 1 provides a treatment capacity that corresponds to only a portion, namely strictly less than 100%, of the maximum airflow treated by the air conditioning system 200, in particular less than 70%, especially less than 50%, for example less than 40%. The air handling module 1 can thus have a reduced footprint. The lower the proportion of the airflow treated, the smaller the footprint of the treatment module 1 can be. The inventors observed satisfactory results in terms of the size / air quality trade-off with a proportion of the treated airflow (relative to the maximum airflow of the air conditioning system) between 25% and 60%, in particular between 30% and 50%. This differs from the case where an air handling module 1 that allows for deliver 100% of the air volume used by the air conditioning system 200. In this case, the air handling module 1 would need to have greater capacities and therefore a larger footprint, with also a higher cost.

[0075] The air handling module 1 is configured for example to deliver treated air with a flow rate of 180 m3 / hour (generally a flow rate which can be chosen between 125 and 300 m3 / h, in particular between 150m3 / h and 250m3 / h), for a treatment capacity by the air conditioning system which is 500 m3 / hour.

[0076] The air treatment module 1 is configured to be able to treat air coming only from the predetermined enclosure here the passenger compartment 50.

[0077] The air conditioning unit 100 is configured so that the air conditioning system 200 receives a mixture of air coming solely from: - from enclosure 50, directly, in other words without processing; - of processing module 1.

[0078] The invention makes it possible, in particular, thanks to this air treatment module 1, to dehumidify the air without using an evaporator. For example, the air conditioning system 200 can be operated without an evaporator when it delivers hot air, thus reducing the cost of such an air conditioning system, which can be of a simpler design.

[0079] The treated air outlet 3 of the air treatment module 1 is configured to be placed opposite an air inlet 201 of the air conditioning system 200.

[0080] The treated air outlet 3 of the air treatment module 1 has a smaller passage section than the air inlet section 201 of the air conditioning system 200.

[0081] This allows the air conditioning system 200 to take not only air Fl from the air handling module 1 but also air F2 taken directly from the passenger compartment 50 (and therefore not treated by the air handling module), as illustrated in [Fig.3].

[0082] For example, the air outlet 3 of the air handling module 1 is configured to be located at a non-zero distance Dist from the air inlet 201 of the air conditioning system 200 (see [Fig.2]).

[0083] Thus it is not necessary to physically connect the air outlet 3 of the air treatment module 1 to the air conditioning system 200.

[0084] Alternatively, the air outlet 3 of the air treatment module 1 is connected to the air conditioning system 200 for example by a dedicated pipe 63 (see [Fig.6]).

[0085] The air handling module 1 includes a motor-fan unit 15 (or “Blower” in English), for example of axial type, to force air circulation within the body 10 of the air handling module 1.

[0086] The motor-fan group 15 is provided in addition to a main motor-fan group 215, in particular of axial or centrifugal-axial or centrifugal type, which equips the ventilation system 200.

[0087] The air inlet 2 of the air treatment module 1 is formed on a convergent 27 connecting to the inlet of the motor-fan group 15.

[0088] In figures 1 and 2, the housing of the motor-fan assembly 215 is partially cut out visually in order to show the blades.

[0089] Alternatively, the air handling module 1 is without a motor-fan assembly.

[0090] The air outlet 3 of the air handling module 1 is then positioned opposite the inlet 201 of the main motor-fan assembly 215 belonging to the air conditioning system 200.

[0091] Preferably, the CO2 capture device 4 from the air includes an activated carbon filter or another adsorbent material and / or a metallo-organic structure.

[0092] If desired, the air treatment module 1 includes a particle filter 19, placed between the capture device 4 and the dehumidification device 5, here a high efficiency air filter, in particular called a HEPA filter in English (for High Efficiency Particulate Air).

[0093] Advantageously, it is possible to use a combined filter which performs several functions, for example of capturing CO2 and / or capturing certain gases and / or capturing certain particles.

[0094] The air handling module 1 may include a vacuum pump 18 (or an air pump or other pump / motor-fan unit system) to force air used for dehumidification to pass through the dehumidification device 5. The air to be dehumidified is set in motion, for example, by a motor-fan unit.

[0095] If dehumidification is required, the flow rate through the air treatment module 1 is chosen to be between 180 and 250 m3 / hour.

[0096] The air treatment module 1 allows, for example, the adsorption and / or absorption of substances such as CO2 and H2O (in vapor form in particular), and also nitrogen oxides (NOx) and / or volatile organic compounds.

[0097] The air treatment module 1 forms a self-contained module independent of the air conditioning system 200.

[0098] In the example described, the air conditioning system 200 has a single heat exchanger, here an evaporator-condenser 220. The evaporator-condenser 220 is configured to operate as an evaporator in "summer" mode (in hot weather, to generate coolness, i.e., an air conditioning mode) and as a condenser in "winter" mode (in cold weather, to generate heat, i.e., a heating mode).

[0099] The air conditioning assembly 100 is configured to be able to disable the air handling module 1 or to bypass the air handling module 1, when the air handling module 1 is not required to dehumidify the passenger compartment air in addition to the air conditioning system evaporator, particularly in "summer" conditions, in air conditioning mode.

[0100] Thus, in an example of an embodiment of the invention illustrated in [Fig.6], the air conditioning assembly 100 includes a control unit 60 configured to control the type of air to be sent into the air conditioning system 200, the type of air being chosen from air treated by the air treatment module 1, air coming directly from the predetermined enclosure such as a passenger compartment 50, or a mixture of the two according to an adjustable treated / untreated air ratio.

[0101] The control unit 60 is configured to control a flap 65 which, depending on its angular position, allows the treated / untreated air ratio to be changed to be sent into the air conditioning system 200.

[0102] The air flow rate exiting the air treatment module 1 can thus be calibrated using the flap 65 which regulates the passage of air exiting the air treatment module 1.

[0103] Module 1 can thus be a combined module with the air conditioning (HVAC) system, an actuator and a flap / flaps are provided to manage the airflow required for the air intake of the air conditioning (HVAC) system in order to ensure that a sufficient portion of the recycled air passes through the air handling module.

[0104] The invention thus enables the following step: - deliver air treated by the air treatment module 1, which represents only a part of the maximum treatment flow rate by the air conditioning system 200.

[0105] In the example of [Fig.3], the air handling module 1 is placed globally in space 70 under the hood of the vehicle, and the air conditioning system 200 (HVAC) is placed on the passenger compartment side 50.

[0106] Alternatively, as in the example of [Fig.4], the air handling module 1 and the air conditioning system 200 (HVAC) are placed on the passenger compartment side 50.

[0107] Alternatively, as in the example of [Fig.5], the air handling module 1 and the main motor-fan group 215 of the air conditioning system 200 (HVAC) are placed globally in the space 70 under the hood of the vehicle, while the heat exchanger 220, in particular of the evaporator-condenser type, of the air conditioning system 200 is located on the passenger compartment side 50.

Claims

Demands

1. Air conditioning assembly (100) for a vehicle, in particular for a motor vehicle, comprising, on the one hand, an air conditioning system (200) for a predetermined enclosure (50) such as a vehicle passenger compartment and, on the other hand, an air handling module (1), the air handling module (1) comprising: - an air inlet (2) configured to be supplied, in operation, at least in part by interior air taken from the predetermined enclosure (50); - a capture device (4) configured to capture CO2 contained in the air passing through the air handling module (1); - a dehumidification device (5) for the air passing through the air handling module (1);- a treated air outlet (3) configured to deliver air treated by the air handling module (1) to the air conditioning system (200), the air handling module (1) being sized to deliver treated air in a proportion less than half of the air conditioning system's treatment capacity.

2. Air conditioning assembly (100) according to the preceding claim, wherein the dehumidification device (5) includes a desiccant, for example a desiccant wheel, and in particular the dehumidification device (5) is devoid of an evaporator-type heat exchanger.

3. Air conditioning assembly (100) according to any one of the preceding claims, wherein the air handling module (1) is sized so that the maximum air flow rate treated in the air handling module (1) is less than the maximum air flow rate treated by the air conditioning system (200), and the maximum air handling flow rate by the air conditioning system (200) is in particular between 400 and 600 m3 / h, in particular between 450 m3 / h and 550 m3 / h, for example 500 m3 / h.

4. Air conditioning assembly (100) according to any one of the preceding claims, wherein the air conditioning system (200) is lacking fresh air intake, in particular the air conditioning unit (100) lacks fresh air intake.

5. Air conditioning unit (100) according to any one of the preceding claims, wherein the air handling module (1) is configured to be able to handle air coming only from the predetermined enclosure (50), and in particular the air conditioning unit (100) is configured to be able to handle air coming only from the predetermined enclosure (50).

6. Air conditioning assembly (100) according to any one of the preceding claims, wherein the air conditioning assembly (100) is configured so that the air conditioning system (200) receives an air mixture from only: - the enclosure (50), directly, i.e. without treatment; - the treatment module (1).

7. Air conditioning assembly (100) according to any one of the preceding claims, wherein the treated air outlet (3) of the air handling module (1) is configured to be placed opposite an air inlet (201) of the air conditioning system (200), and in particular the treated air outlet (3) of the air handling module (1) has a smaller cross-section than the cross-section of the air inlet (201) of the air conditioning system (200).

8. Air conditioning assembly (100) according to the preceding claim, wherein the air outlet (3) of the air handling module (1) is configured to be disposed at a non-zero distance (Dist) from the air inlet of the air conditioning system (200).

9. Air conditioning assembly (100) according to claim 7, wherein the air outlet of the air handling module (1) is connected to the air conditioning system (200).

10. Air conditioning unit (100) according to any one of the preceding claims, wherein the air handling unit (1) includes a motor-fan unit (15), in particular of the axial type, for forcing air circulation within the air handling unit (1), in particular the motor-fan unit within the air handling unit (1) is provided in addition to a main motor-fan unit (215), in particular of the axial or centrifugal-axial type, which equips the ventilation system.

11. Air conditioning unit (100) according to any one of claims 1 to 9, wherein the air handling module (1) is devoid of a motor-fan unit.

12. Air conditioning assembly (100) according to any one of the preceding claims, wherein the CO2 capture device (4) comprises an activated carbon and / or metallo-organic structure filter.

13. Air conditioning assembly (100) according to any one of the preceding claims, wherein the air handling module (1) comprises one or more particle filters.

14. Air conditioning assembly (100) according to any one of the preceding claims, wherein the air conditioning assembly (100) comprises a control unit (60) configured to control the type of air to be sent into the air conditioning system (200), the type of air being selected in particular from air treated by the air handling module (1), air coming directly from the predetermined enclosure such as a passenger compartment, or a mixture of both.

15. An air treatment method using an air conditioning assembly (100) comprising an air conditioning system (200) and an air treatment module (1) according to any one of the preceding claims, the method comprising the following step: - delivering air treated by the air treatment module (1), which represents only a part of the maximum treatment flow rate by the air conditioning system (200), the air treatment module (1) being sized to deliver treated air in a proportion less than half of the treatment capacity of the air conditioning system.

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