FR2960623A1 - Case for housing active carbon filter collecting pollutants conveyed by air flow circulating in heating, ventilation and air-conditioning installation of motor vehicle, has evacuation pipe provided with desorbed pollutant evacuation unit - Google Patents

Abstract

The case (3) has a filter regeneration unit (26) desorbing pollutants. A condensate evacuation pipe (29) is equipped with a desorbed pollutant evacuation unit (19). The desorbed pollutant evacuation unit is provided with an additional pulser (31). The desorbed pollutant evacuation unit includes a channel (32) arranged between the case and the condensate evacuation pipe. The channel includes a portion (37) that forms angle (alpha1) with general extension direction (D1) of the condensate evacuation pipe. An independent claim is also included for a method for implementing a heating, ventilation and air-conditioning installation.

Description

Air conditioning installation housing comprising a filter and means for discharging pollutants desorbed from the filter.

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 a housing constituting such an installation, the housing housing a filter adapted to capture pollutants conveyed by a flow of air flowing inside said installation, the housing being provided with means for regenerating the filter. It also relates to an installation comprising such a housing. Finally, it relates to a method for implementing such an installation in regeneration mode of the filter.

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. The installation consists mainly of a housing provided with an external air inlet, a recirculating air inlet and an air outlet. The outside air intake mouth is formed through the housing to allow admission of an outside air flow from the outside of the vehicle to the housing. The recirculation air intake port is formed through the housing to allow an intake of a recirculating air stream from the passenger compartment of the vehicle to the housing. The housing is equipped with a recycling flap which is designed to take several positions between a full closed position of the recirculating air intake opening, and an at least partially open position. The air delivery mouth is formed through the housing to allow evacuation out of the housing to the passenger compartment of a heat treated air stream from the outside air flow and / or the recirculated air stream . The air delivery mouth is provided with an air distribution flap which is movable between an open position in which the air distribution flap allows a passage of air through the delivery mouth of air and a closed position in which the air distribution flap prohibits such a passage of air.

The housing houses a blower capable of taking the outside air flow and / or the recirculating air flow. The housing defines an upstream volume that is provided with the outside air intake and the recirculating 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, indifferently outside and / or recycling, from the upstream volume to the downstream volume.

The housing also houses heat treatment means for modifying a temperature of a sampled air flow, regardless of whether it consists of the outside air flow and / or the recirculating air flow, by providing the heat-treated air flow. . The heat treatment means are in particular a radiator which is intended to heat the flow of air taken and an evaporator which is able to cool the flow of air taken. The evacuation of the heat-treated air flow out of the housing is carried out via the air delivery mouth. The heat treatment means of the air flow taken are housed inside the downstream volume.

When the evaporator is turned on, condensates tend to form on an external surface of the evaporator because of the moisture conveyed by the airflow. To eliminate condensate, the housing has a condensate drain that opens outwardly of the vehicle. The duct is formed under the evaporator so as to collect the condensates by runoff under the effect of gravity. The conduit has a condensate inlet through the housing and a condensate outlet located outside the vehicle.

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 FR 2,845,642 (PEUGEOT CITROEN AUTOMOBILES SA) which describes such an installation in which the filter is housed inside the downstream volume, more particularly 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. The regeneration means comprise an electrical resistance equipping the filter, the electrical resistance being provided to heat the filter by Joule effect and thereby to desorption of previously retained pollutants. The installation also includes a blower to create a regenerative air flow loaded desorbed pollutants, the regeneration flow being discharged out of the housing via the condensate discharge conduit.

Also, in the operating mode called "regeneration of the filter", it is necessary to activate the blower and to place in the closed position the recycling flap to allow admission of the outside air flow inside the upstream volume. It is also necessary to place in the closed position the air distribution flap to prevent any passage of air from the downstream volume to the passenger compartment. The electrical resistance is switched on. Under these conditions, the outside air flow passes through the blower, then the filter to become the pollutant-laden regeneration flow which then takes the condensate discharge pipe to be delivered to the outside of the vehicle.

A disadvantage of such regeneration means lies in the fact that the latter can be used only for an installation comprising an air distribution flap which must be positioned in the closed position to prevent delivery of the regeneration air flow to the room. inside the cockpit.

Object of the invention The object of the present invention is to propose a housing constituting a ventilation, heating and / or air conditioning installation which is equipped with means for discharging pollutants desorbed from a filter that the housing houses, said means for evacuation of desorbed pollutants being simple, effective, being adaptable to a relatively arbitrary housing. More particularly, another object is to provide means for removing desorbed pollutants that overcome the presence and / or position of at least one air distribution flap. Another object is to provide a ventilation, heating and / or air conditioning installation comprising such a housing. A last goal is to propose a method for implementing such a facility that is simple and reliable.

A housing of the present invention is a housing of a ventilation, heating and / or air conditioning system. The housing houses a filter and is provided with a condensate drain. The housing is equipped with means for regenerating the filter capable of desorbing pollutants. According to the present invention, the condensate discharge conduit is equipped with desorbed pollutant removal means.

The means for discharging desorbed pollutants advantageously comprise an additional blower.

The additional blower equips eg the condensate drain.

The means for discharging desorbed pollutants preferably comprise a channel formed between the casing and the condensate discharge duct.

The additional blower equips the channel for example.

Preferably, the channel comprises a portion which forms an angle a1 with a general extension direction D1 of the condensate discharge duct. The channel preferably comprises at least a first inlet orifice arranged downstream of the filter according to a direction of air flow inside the housing

The channel advantageously comprises at least one inlet second formed upstream of the filter in the direction of flow of air inside the housing.

Preferably, at least one of the first inlet port and / or the second inlet port is formed through an upper wall of the housing.

A ventilation, heating and / or air conditioning system of the present invention includes such a housing.

A method of implementing such a ventilation, heating and / or air conditioning system is characterized in that the method comprises the following successive steps: - shutting down a main blower, - setting stopping an additional blower, - activation of a power supply for a period of time between 10 s and 15 min, - activation of the additional blower.

Description of the figures.

The present invention will be better understood on reading the description which will be made of exemplary embodiments, in relation to the figures of the attached plates, in which: Fig.1 to Fig.6 are schematic illustrations of a ventilation, heating and / or air conditioning system according to respective embodiments of the present invention. In the figures, a motor vehicle is equipped with a ventilation, heating and / or air conditioning system 1 for modifying the aerothermal parameters of the air contained inside a passenger compartment of the vehicle. Such a modification is obtained from the delivery inside the cabin of at least one heat-treated air stream. For this purpose, said installation 1 comprises a housing 3 made of plastic material and housed under a dashboard. The housing 3 comprises at least one 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 comprises at least one recycling air inlet 8 which allows the passage of a stream of recirculation air 9 between a passenger compartment 10 of the vehicle and the internal volume 7. The housing 3 houses a recycling flap 12 to allow or prohibit admission of the outside air flow 4 and / or the recirculation air flow 8 to the inside of the internal volume 7.

The casing 3 finally comprises at least one air outlet opening 11 to allow the discharge of the heat-treated air flow out of the casing 3 towards the passenger compartment 10. The air-supplying outlet 11 is preferably free of flaps. air distribution. However, the air delivery mouth 11 is likely to be equipped with an air distribution flap that can be operated between an open position in which the air distribution flap allows a passage of the treated air flow. thermally through the air delivery mouth 11 and a closed position in which the air distribution flap prohibits such a passage. In this case, the position of the air distribution flap is irrelevant for the implementation of the present invention.

The housing 3 is equipped with a main blower 15 to circulate the air inside the housing 3, and more particularly from at least one of the air intake ports 4.8 to the delivery port 11. The main blower 15 shares the internal volume 7 in two distinct volumes including an upstream volume 16 and a downstream volume 17.

The housing 3 houses heat treatment means 21,22 of the air prior to its discharge from the downstream volume 17 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 evaporator 21 is placed upstream of the radiator 22 in a direction of flow 18 of the air inside the casing 3. In order to collect by gravity condensates which may form on the evaporator 21, the casing 3 is provided with a condensate collector 27 which is disposed under the evaporator 21. The condensate collector 27 is arranged in a bowl for receiving the condensates which drip from the evaporator 21. The condensate collector 27 comprises a bottom 28 which is provided with a condensate discharge conduit 29 towards the outside of the vehicle. The condensate discharge conduit 29 extends between a proximal orifice 100 formed through the bottom 28 of the condensate trap 27 and a distal port 101 placed outside the vehicle. The distal orifice 101 is preferably provided with a distal valve 102 which is movable between an open position in which the distal valve 102 allows a passage of air and / or condensates through the distal orifice 101 and a position closure in which the distal valve 102 prohibits such a passage. In the closed position, the distal valve 102 makes it possible to prevent an unwanted admission of gas from the outside 6 inside the condensate discharge duct 29.

The housing 3 finally houses a filter 23 adapted to retain, especially by adsorption, pollutants carried by the air flowing inside the housing 3. The filter 23 is for example an active carbon filter or the like.

The housing 3 is equipped with regeneration means 26 of the filter 23. The regeneration means 26 of the filter 23 comprise an electrical resistance 24 in connection with a power supply source 25. The implementation of the latter makes it possible to heat Joule electric resistance 24, and therefore the filter 23. Such a heating filter 23 at a temperature of about 60 ° C to 120 ° C induces desorption of pollutants. Alternatively, the filter 23 is itself electrically conductive so that the electrical resistance 24 consists of the filter 23 itself, the passage of an electric current delivered by the power supply 25 to desorption of pollutants without the necessity of equipping the filter 23 with an electrical resistance. The filter 23, and possibly the electrical resistance 24, are housed inside the housing 3, being interposed between the main blower 15 and the evaporator 21.

The present invention proposes that the condensate discharge duct 29 be equipped with evacuation means 19 for the desorbed pollutants. The evacuation means 19 desorbed pollutants allow an expulsion of pollutants desorbed out of the housing 3 to the outside 6 of the vehicle without affecting the passenger compartment 10 of the vehicle. Thus, the evacuation means 19 desorbed pollutants are associated with the condensate discharge conduit 29 without the need to implement other components of the ventilation system, heating and / or air conditioning 1.

The evacuation means 19 desorbed pollutants comprise an additional blower 31 which is separate from the main blower 15 of the ventilation system, heating and / or air conditioning 1. The additional blower 31 is able to take a stream of air regeneration 30 inside the internal volume 7 to evacuate to the outside 6 of the vehicle. The flow of regeneration air 30 is for example of a flow rate of the order of 50 kg / h while the main blower 15 is sized to deliver an air flow rate of the order of 150 kg / h to 600 kg / h. As a result, the additional blower 31 is more suited to the specific need for evacuation of desorbed pollutants than the main blower 15, being smaller in size and more economical in terms of its energy consumption.

Furthermore, it follows from the presence of the additional blower 31 a significant advantage of the present invention that resides in the fact that the regeneration flow 30 is indifferently a flow of air admitted inside the downstream volume 17 via the outside air intake opening 4 and / or the recycling air intake opening 8 and / or the air distribution opening 11, the recycling flap 12 and the possible distribution flaps air being placed in any position and indifferent for the implementation of the present invention.

According to a first variant illustrated in FIG. 1, the additional blower 31 equips the condensate discharge duct 29 by being interposed between the condensate trap 27 and the distal orifice 101 of the condensate discharge duct 29.

These provisions are such that in regeneration mode of the filter 23, the main blower 15 is off, the power supply 25 is activated, the additional blower 31 is activated so that the regeneration flow 30 is admitted inside the downstream volume 17 via the external air inlet 4 and / or the recirculation air inlet 8, then passes through the main blower 15, then the filter 23 then the evaporator 21 to go to the condensate collector 27, in order to take the condensate discharge pipe 29, then to cross the additional pulsator 31 and to be evacuated outside the installation 1 through the distal orifice 101, the valve 34 being placed in the open position under the effect of the pressure exerted by the regeneration flow 30.

According to other respective variants illustrated in FIGS. 2 to 6, the evacuation means 19 for the desorbed pollutants comprise a channel 32 which is formed between the condensate discharge duct 29 and the casing 3. The channel 32 extends between at least one inlet 38,38 'formed through the housing 3 and a connecting orifice 36 formed through the condensate discharge conduit 29. A first inlet 38 is formed between the filter 23 and the evaporator 21. A proximal valve 103 preferably equips the proximal orifice 100 to prevent a passage of the regeneration flow 30 through the proximal orifice 100.

A check valve 104, 104 'can respectively equip the inlet port 38, 38' to prevent an air passage from the channel 32 to the internal volume 7.

In FIGS. 2 and 3, the channel 32 comprises at least one portion 37 which is formed along a general axis of extension A1 which forms an angle a1 with a general extension direction D1 of the condensate discharge duct. 29.

The angle a1 is between 15 ° and 90 ° and is preferably of the order of 75 °. Such an arrangement aims to prevent a passage of condensates from the condensate discharge duct 29 to the channel 32.

In FIG. 2, the additional blower 31 equips the condensate discharge duct 29 by being interposed between the junction orifice 36 and the distal orifice 101. These arrangements are such that, in the regeneration mode of the filter 23, the main blower 15 is off, the power source 25 is activated, the additional blower 31 is activated so that the regeneration flow 30 is admitted inside the internal volume 7 via the 4 outside air intake port and / or the recycling air intake mouth 8, then through the main blower 15, then the filter 23. A first portion of the regeneration flow 30 has taken the channel 32 since the first inlet orifice 38 to the junction port 36. A second portion of the regeneration flow 30 passes through the evaporator 23 to go to the condensate collector 27, in order to take the evacuation duct condensates 29 and join the first part of the regeneration flow 30 at the junction port 36. Then the regeneration flow 30 passes through the additional blower 31 and is discharged outside the facility 1 through the outlet port 35.

In FIG. 3, the additional blower 31 equips the channel 32. These arrangements are such that, in regeneration mode of the filter 23, the main blower 15 is at a standstill, the power supply 25 is activated, the blower additional 31 is activated in such a way that the regeneration flow 30 is admitted inside the internal volume 7 via the external air inlet 4 and / or the mouth of the intake port. recirculation air 8, then passes through the main blower 15, then the filter 23. The regeneration flow 30 takes the channel 32 from the first inlet 38, passes through the additional blower 31 to go to the junction port . Then, the regeneration flow 30 takes the condensate discharge pipe 29 to be discharged outside the installation 1.

According to a fourth variant and a fifth variant illustrated respectively in Fig.4 and Fig.5, the first inlet port 38 is formed through an upper wall 48 of the housing 3, that is to say the wall located in against a lower wall 50 of the housing 3 which is equipped with the condensate collector 27. The additional pulsator 31 is preferably disposed in the upper part 49 of the channel 32, in other words close to the first inlet orifice 38 of such arrangements are such that in regeneration mode of the filter 23, the main blower 15 is at a standstill, the power supply 25 is activated , the additional blower 31 is activated so that the regeneration flow 30 is admitted inside the internal volume 7 via the outside air inlet 4 and / or the mouth of the mouth. Admission r recycling 8, then through the main blower 15, then the filter 23. The regeneration flow 30 takes the channel 32 from the first inlet port 38 to the junction port 36 through the additional blower 31. The flow Since the regeneration flow 30 is a flow of hot air, the high position of the first inlet orifice 38 facilitates the admission of the regeneration air flow 30 into the interior of the channel 32. The regeneration flow 30 then flows through the duct 32. discharge of the condensates 29 to be evacuated outside the installation 1.

According to the fifth variant illustrated in FIG. 5 and a sixth variant illustrated in FIG. 6, the channel 32 is further equipped with a second inlet orifice 38 '. The second inlet 38 'is formed through the housing 3 upstream of the filter 23 in the direction of flow 18 of the air inside the housing 3.

In FIG. 5, the second inlet orifice 38 'is formed through the upper wall 48 of the housing 3. These arrangements are such that, in regeneration mode of the filter 23, the main blower 15 is at a standstill. power source

12 25 is activated, the additional blower 31 is activated so that the regeneration flow 30 is admitted inside the internal volume 7 via the outside air intake port 4 and / or the the mouth of the recirculation air intake port 8 and / or of the air delivery port 11, then passes through the filter 23. The regeneration flow 30 takes the channel 32 from the first inlet port 38 and / or the second inlet 38 '. Since the regeneration flow 30 is a flow of hot air, the high position of the first inlet orifice 38 and the second inlet orifice 38 'facilitates admission of the regeneration air flow 30 into the interior of the channel. 32. The regeneration flow 30 then flows through the condensate discharge duct 29 to be discharged outside the installation 1.

Alternatively, in FIG. 6, the first inlet orifice 38 and the second inlet orifice 38 'are formed through the bottom wall 50 of the housing 3.

A method of implementing the ventilation, heating and / or air conditioning system 1 comprises the following successive steps: - shutdown of the main blower 15, - shutdown of the additional blower 31, - activation of a power supply 25 for a period of time between 10 s and 15 min.

According to various variants, the activation of the additional pulser 31 succeeds the activation of the power source 25 or is simultaneous with the activation of the power source 25 or partially covers the activation of the power source 25. power supply 25.

Claims (1)

1. housing (3) of a ventilation system, heating and / or air conditioning (1), the housing (3) housing a filter (23) and being provided with a condensate discharge duct (29); ), the housing (3) being equipped with regeneration means (26) of the filter (23) capable of desorbing pollutants, characterized in that the condensate discharge duct (29) is equipped with evacuation means (19). ) of desorbed pollutants. 2. Housing (3) according to the preceding claim, characterized in that the means (19) for discharging desorbed pollutants comprise an additional blower (31). 3. Housing (3) according to claims 1 and 2, characterized in that the additional blower (31) equip the condensate discharge conduit (29). 4. Housing (3) according to any one of claims 1 and 2, characterized in that the means (19) for discharging desorbed pollutants comprise a channel (32) formed between the housing (3) and the conduit of condensate drain (29). 5. Housing (3) according to claims 2 and 4, characterized in that the additional blower (31) equips the channel (32). 6. Housing (3) according to any one of claims 4 and 5, characterized in that the channel (32) comprises a portion (37) which forms an angle with a general extension direction D1 of the exhaust duct of condensates (29). 7. Housing (3) according to any one of claims 4 to 6, characterized in that the channel (32) comprises at least a first inlet orifice (38) arranged 13 14 downstream of the filter (23) according to a flow direction (18) of the air inside the housing (3). 8. Housing (3) according to claim 7, characterized in that the channel (32) comprises at least one second inlet (38 ') provided upstream of the filter (23) in the direction of flow (18) of the air inside the housing (3). 9. Housing (3) according to claims 7 and 8, characterized in that at least one of at least the first inlet (38) and / or the second inlet (38 ') is formed through a upper wall (48) of the housing (3). 10.- Ventilation, heating and / or air conditioning (1) comprising a housing (3) according to any one of the preceding claims. 11. A method of implementing a ventilation system, heating and / or air conditioning (1) according to claim 10, characterized in that the method comprises the following successive steps: - shutdown of a main blower (15), - stopping of an additional blower (31), - activation of a power supply (25) for a period of time between 10 s and 15 min, - activation additional pulsator (31).