FR2958221A1 - Ventilation, heating and/or air-conditioning installation for motor vehicle, has case equipped with filter to retain pollutants conveyed by air flows, where filter is rotatably assembled around rotation axis inside wall of case - Google Patents

Abstract

The installation (1) has a case (3) equipped with a filter (23) to retain pollutants conveyed by air flows (2, 5, 9), where the air flows circulate inside the case. The filter is rotatably assembled around a rotation axis (26) inside a wall (27) of the case. The wall delimits a downstream volume (17) of the case, where the downstream volume is equipped with air delivery nozzles (11-13) that deliver air towards a cab interior (10) of a motor vehicle. An air evacuation nozzle (34) evacuates air toward outer side (6) of the motor vehicle. An independent claim is also included for a method for carrying regeneration of a filter.

Description

Ventilation, heating and / or air conditioning installation arranged to regenerate a rotary filter and method of implementation.

Technical Field of the Invention

The invention is in the field of ventilation, heating and / or air conditioning of a motor vehicle. It relates to such an installation provided with a filter adapted to capture pollutants conveyed by a flow of air flowing inside said installation, the latter being provided with regeneration means of said filter. It also relates to a method for implementing said installation in a filter regeneration mode.

State of the art

A motor vehicle is commonly equipped with a ventilation, heating and / or air conditioning system to modify the aerothermal parameters of the air contained inside the passenger compartment of the vehicle. Such a modification is obtained from the delivery of an air flow inside the passenger compartment. The installation consists mainly of a housing provided with at least one air intake opening and at least one air supply outlet equipped with an air distribution flap.

The housing houses a blower to take the airflow out of the housing through the air inlet and to evacuate the airflow from the housing to the passenger compartment. The housing delimits an upstream volume which is provided with the air inlet. The housing also defines a downstream volume which is provided with the air delivery mouth. The blower is interposed between the upstream volume and the downstream volume to circulate the flow of air from the upstream volume to the downstream volume.

The housing also houses heat treatment means for modifying a temperature of the air flow prior to its removal from the housing to the passenger compartment. The heat treatment means include a radiator which is provided to heat the air flow and an evaporator which is able to cool the air flow. The heat treatment means of the air flow are housed inside the downstream volume.

The housing houses a filter capable of capturing the pollutants conveyed by the flow of air taken, such as an activated carbon filter. For example, reference may be made to document FR 2,845,642 (PEUGEOT CITROEN AUTOMOBILES SA) which describes such an installation in which the filter is entirely housed inside the downstream volume. More particularly, the filter is completely interposed between the blower and the evaporator.

The installation is provided with filter regeneration means which allow desorption of previously collected pollutants and their evacuation out of the housing to the outside of the vehicle. Such means comprise a bypass duct which extends between a first opening formed through the housing between the filter and the evaporator and a second opening formed through the housing between a mixing flap and the inlet opening of the housing. air. The bypass duct houses an additional blower to circulate a flow of regeneration air from the first opening to the second opening. The first opening is equipped with a first movable flap between an open position in which the first flap allows an air passage through the first opening and a closed position in which the first flap prohibits such an air passage. . The second opening is equipped with a second movable flap between an open position in which the second flap allows an air passage through the second opening and a closed position in which the second flap prohibits such an air passage .

The regeneration means also comprise an electrical resistance 30 equipping the filter, the electrical resistance being provided to heat the filter by Joule effect which causes desorption of previously retained pollutants.

In operating mode known as "regeneration of the filter", it is necessary to place the first flap and the second flap in the open position in order to allow the flow of regeneration air to circulate inside the bypass duct. It is also necessary to place in the closed position the air distribution flap. The electrical resistance is switched on. Under these conditions, the regeneration air flow passes through the blower, then the filter that is regenerated, then borrows the bypass duct to be evacuated out of the housing through the air intake port.

Such an installation is cumbersome because of the presence of the bypass duct which is arranged in a U-shape outside the housing and which tends to constitute an obstacle during the installation of said installation. In addition, the fact of making the first opening and the second opening through the housing and equip them respectively of the first component and the second component is binding.

In addition, such an installation comprises a plurality of flaps, namely a mixing flap, a first flap, a second flap and at least one air distribution flap, the respective maneuver is necessary for the implementation of said installation. in "filter regeneration" mode. Such a multiplicity is a disadvantage for a simple implementation of said installation.

Finally, such an installation comprises an additional blower whose implementation is necessary in "regeneration filter" mode, which generates additional power consumption of said installation.

Object of the invention

The aim of the present invention is to propose a ventilation, heating and / or air-conditioning installation which is simultaneously able to regenerate a filter that comprises said installation and to provide a flow of air thermally treated by said installation, such an installation being simple to implement and implement.

An installation of the present invention is a ventilation, heating and / or air conditioning of a motor vehicle. Said installation comprises a housing housing a filter adapted to retain pollutants carried by a flow of air flowing inside the housing. The filter is rotatably mounted about an axis of rotation formed inside a wall of the housing.

The wall advantageously delimits a downstream volume of the housing which is provided with at least one air supplying mouth towards a passenger compartment of the vehicle, and a bypass channel which is provided with at least one exhaust air outlet towards the outside of the vehicle.

Preferably, the filter is of a circular conformation SI, the downstream volume and the bypass channel have an identical semicircular section S2.

The bypass channel advantageously houses at least one electrical resistance.

The bypass channel preferably houses at least one additional blower.

The wall comprises for example a window formed between the main blower and the axis of rotation of the filter.

The window is preferably provided with a mobile air distribution member between an open position in which the air distribution member allows an air passage between the downstream volume and the bypass channel and a position of closure in which the air distribution member prohibits such a passage.

The bypass channel incidentally includes an outside air intake.

A method of regeneration of the filter equipping such an installation is mainly recognizable in that the method consists in carrying out the following operations: - rotating the filter around the axis of rotation so that a first part of the filter previously housed inside the downstream volume is placed inside the bypass channel and so that a second part of the filter previously housed inside the bypass channel is placed inside the downstream volume; activate the electrical resistance, - switch on the main pulsator.

Preferably, the method further comprises performing the following operation: - turn on the additional blower.

More preferably, the method further comprises performing the following operation: - put in the open position the air distribution member.

Description of the figures.

The present invention will be better understood on reading the description which will be made of embodiments, in connection with the figures of the attached plates, in which: Fig.1 to fig.3 are schematic illustrations of a ventilation installation, heating and / or air conditioning according to the present invention, said installation being represented in regeneration mode of the filter. The fig.4a and fig.4b are schematic cross-sectional illustrations of the installation shown in the previous figures in various stages of the method of implementation of said installation.

In FIGS. 1 to 3, a motor vehicle is equipped with a ventilation, heating and / or air conditioning installation 1 for modifying the aerothermal parameters of the air contained inside the passenger compartment of the vehicle. . Such a modification is obtained from the delivery inside the cabin of at least one stream of heat-treated air 2. For this purpose, said installation 1 comprises a housing 3 made of plastic material and housed in a housing. dashboard and / or a water box of the vehicle. The housing 3 comprises an external air inlet 4 which allows the passage of an outside air flow 5 between the outside 6 of the vehicle and an internal volume 7 defined by the housing 3. The housing 3 also includes a recycling air intake opening 8 which allows the passage of a stream of recirculation air 9 between the passenger compartment 10 of the vehicle and the internal volume 7. The housing 3 finally comprises three air delivery vents 11, 12, 13, such as a defrost / defogger mouth 11, a head air vent 12 and a feet air vent 13. The air delivered through the defrost / demister mouth 11 allows ventilate a front area of the passenger compartment where the windshield of the vehicle is located, the head air vent 12 allows to ventilate an upper area of the passenger compartment while the foot vent vent 13 allows to ventilate a lower area of the passenger compartment. Each air outlet 11,12,13 is provided with a respective air distribution flap 14 which is operable between an open position in which the air distribution flap 14 allows an air passage through the air delivery mouth 11,12,13 that the air distribution flap 14 equips and a closed position in which the air distribution flap 14 prohibits such a passage.

The housing 3 houses a main blower 15 to circulate the air inside the housing 3, and more particularly from at least one of the air intake vents 4.8 to at least one of the mouths of air delivery 11,12,13. The main blower 15 shares the internal volume 7 in two distinct volumes including an upstream volume 16 and a downstream volume 17. The upstream volume 16 is equipped with the air intake ports 4,8 while the downstream volume 17 is provided with air vents 11,12,13. The upstream volume 16 includes a mixing chamber 18 within which the outside air stream 5 and the recirculating air stream 9 are capable of being mixed with each other. The mixing chamber 18 has an outside air inlet 19 through which the flow of outside air 5 from the outside air inlet 4 enters the chamber. The mixing chamber 18 is also provided with the recirculating air inlet 8, so that the recirculating air stream 9 enters directly from the passenger compartment 10 inside the vehicle. mixing chamber 18 via the recirculation air intake orifice 8. The housing 3 is equipped with a mixing flap 20 which is movable between at least one recycling position in which the mixing flap 20 closes the outside air inlet 19 and an outer position in which the mixing flap 20 closes the recirculating air intake opening 8. The mixing flap 20 can be placed in an intermediate position in which the mixing flap 20 closes the outside air intake opening 19 and the recirculating air intake opening 8.

The housing 3 also houses heat treatment means 21,22 of the air prior to its removal from the housing 3 to the passenger compartment 10. The heat treatment means 21,22 are in particular an evaporator 21 provided for cooling the air which passes through and a radiator 22 adapted to heat this air. The radiator 22 is optionally associated with electrical resistors of the positive temperature coefficient resistance type, commonly known as "CTP". The heat treatment means 21, 22 are placed inside the downstream volume 17.

The installation 1 comprises a filter 23 adapted to retain, in particular adsorption, pollutants carried by the air flowing inside the housing 3. The filter 23 is for example an activated carbon filter.

To allow a regeneration of the filter 23, while providing a relatively low thermal comfort inside the passenger compartment 10 of the vehicle, the present invention proposes to mount rotating the filter 23 about an axis of rotation 26 provided to the inside a wall 27 of the housing 3. The axis of rotation 26 is included inside a plane P of general extension of the wall 27. The plane P of general extension of the wall 27 is formed orthogonally in the plane of fig.1 to fig.3. The filter 23 is made in a plane P 'which is orthogonal to the plane P of general extension of the wall 27 and the plane of fig.1 to fig.3.

The filter 23 comprises a first portion 28 which is housed inside the housing 3 and a second portion 29 which is housed inside a branch channel 30 of the housing 3. From a rotation of the filter 23 around the axis of rotation 26, it is possible to place the first portion 28 of the filter 23 inside the downstream volume 17 and the second portion 29 of the filter 23 inside the bypass channel 30, or vice versa. placing the second portion 29 of the filter 23 within the downstream volume 17 and the first portion 28 of the filter 23 within the branch channel 30, as illustrated successively in Figs.4a and Fig.4b. The filter 23 is preferably of a circular section S1 taken in the plane P 'while the downstream volume 17 and the bypass channel 30 are both of a semicircular section S2 also taken in the plane P '. The circular section SI equals twice the section-semicircular S2.

The branch channel 30 houses at least one electrical resistor 31 of the positive temperature coefficient type, commonly called "CTP". Such an electrical resistance 31 is able to heat a flow of regeneration air 32 which passes through it. The electrical resistance 31 is placed upstream of the second portion 29 of the filter in a direction of circulation 33 of the regeneration air flow 32 inside the bypass channel 30. It follows that the regeneration air flow 32, heated by the electrical resistance 31, is able to depollute the second portion 29 of the filter 23. The regeneration air flow 32 charged with the pollutants is then discharged from the housing 3, and more particularly out of the bypass channel 30, by via an air outlet valve 34 to the outside 6 of the vehicle, which comprises the bypass channel 30.

In Fig.1 and Fig.2, the wall 27 has a window 35 to allow an air passage between the downstream volume 17 and the bypass channel 30. It follows that the flow of regeneration air 32 is indifferently from a recycling air stream 9 and / or an outside air stream 5, depending on the position of the mixing flap 20.

In FIG. 2, the window 35 is provided with an air distribution member 36 which is movable between an open position in which the air distribution member 36 allows a passage of air through the window 35 and a closed position in which the air distribution member 36 prohibits such a passage. The air distribution member 36 is indifferently a flag flap, a butterfly flap or the like, or even a movable flap under the effect of an air overpressure inside the downstream volume 17.

In FIG. 3, the bypass channel 30 is provided with an outside air inlet 37, so that the regeneration air flow 32 is an external air flow flowing only at through the bypass channel 30 from the outside 6 of the vehicle to the outside 6 of the vehicle. Such circulation of the regeneration air flow 32 is obtained from the implementation of an additional pulsator 38 housed inside the bypass channel 30. Such additional pulsator 38 is able to provide a flow rate of air of the order of 50 kg / h while the main blower 15 is able to provide an air flow of the order of 150 kg / h to 600 kg / h.

It follows from all these provisions an advantageous faculty of the present invention which lies in the fact that such an installation 1 simultaneously allows a desorption of a portion 28,29 of the filter 23 while the other part 29,28 is able to retain the pollutants circulating inside the downstream volume 17. In fact, the desorption of the portion 28,29 of the filter 23 placed inside the bypass channel is carried out independently of the position of the mixing flap 20 and air distribution flaps 14. These are particularly likely to be placed in the open position to deliver the heat-treated air stream 2.

Claims (1)

Claims1.- Installation of ventilation, heating and / or air conditioning (1) of a motor vehicle, said installation (1) comprising a housing (3) housing a filter (23) adapted to retain pollutants carried by a flow of air (5,9,2) circulating inside the housing (3), characterized in that the filter (23) is rotatably mounted about an axis of rotation (26) arranged inside a housing wall (27) of the housing (3). 2.- Installation (1) according to the preceding claim, characterized in that the wall (27) defines a downstream volume (17) of the housing (3) which is provided with at least one air outlet (11, 12,13) to a passenger compartment (10) of the vehicle, and a bypass channel (30) which is provided with at least one outward air outlet (34) for the vehicle (6). 3.- Installation (1) according to claim 2, characterized in that the filter (23) is of a circular conformation SI and in that the downstream volume (17) and the bypass channel (30) have a section half -circular S2 identical. 4.- Installation (1) according to any one of claims 2 and 3, characterized in that the bypass channel (30) houses at least one electrical resistance (31). 5. Installation (1) according to any one of claims 2 to 4, characterized in that the bypass channel (30) houses at least one additional blower (38). 6.- Installation (1) according to any one of the preceding claims, characterized in that the wall (27) comprises a window (35) formed between the main blower (15) and the axis of rotation (26) of the filter (23). 7.- Installation (1) according to claim 6, characterized in that the window (35) is provided with an air distribution member (36) movable between an open position in which the dispensing member d air (36) allows an air passage between the downstream volume (17) and the bypass channel (30) and a closed position in which the air distribution member (36) prohibits such a passage. 8.- Installation (1) according to any one of claims 2 to 7, characterized in that the bypass channel (30) comprises an outside air inlet (37). 9. A method of regenerating the filter (23) equipping an installation (1) according to any one of claims 4 to 8, characterized in that the method consists in performing the following operations: - rotate the filter (23) around of the axis of rotation (26) so that a first portion (28) of the filter (23) previously housed inside the downstream volume (17) is placed inside the bypass channel (30). ) and so that a second part (29) of the filter (23) previously housed inside the bypass channel (30) is placed inside the downstream volume (17), - activate the electrical resistance (31), - switch on the main blower (15). 10. The method of claim 9 for the implementation of an installation (1) according to claim 5, characterized in that the method further comprises performing the following operation: - turn on the additional blower (38). ). 11.- Method according to any one of claims 9 and 10 for the implementation of an installation (1) according to claim 7, characterized in that the method further comprises performing the following operation: - put in opening position the air distribution member (36).