FR2865159A1 - Opening sealing device for ventilation, heating and/or air conditioning installation of motor vehicle, has part with guiding pin, and another part with guiding units and tongue exerting force on filtration unit having large surface - Google Patents

Abstract

The device (5) has a part (7) with a guiding pin (22) allowing the device to close an opening of ventilation, heating and/or air conditioning installation. A part (8) is partially in contact with a filtration unit having a large working surface. The part (8) has a tongue (9) at its free end to maintain and center the device and to exert force on the filtration unit and two edges (15, 16). Each edge has a guiding unit (17). Independent claims are also included for the following: (A) a ventilation, heating and/or conditioning installation (B) a method of dismounting a filtration unit of a ventilation, heating and/or conditioning installation of a motor vehicle.

Description

2865159 1

  The technical sector of the present invention is that of ventilation, heating and / or air conditioning installations and in particular that of the air filtration devices of these installations.

  Motor vehicles are equipped with a ventilation, heating and / or air conditioning system that delivers a heat-treated air stream according to the demand of the user of the vehicle. This air flow is also purified thanks to filtration means integrated into the installation.

  However and despite the evolution of these means of filtration, it is always necessary to replace them either periodically or because they are out of service. By way of example, the most common filtration means is the particulate filter. The latter must be replaced at intervals of between ten thousand and fifteen thousand kilometers. Another filtering means is the activated carbon filter. It should be replaced on average every thirty thousand kilometers. Finally, some filtration means have a longer life (photo-catalysis filter or plasma-catalysis) but their prices require the designers of ventilation, heating and / or air conditioning to provide access to extract these means of filtration and possibly intervene in a corrective or preventive way. In short, it is necessary to provide access to these filtration means, this access to be closed by a shutter device, otherwise called hatch, necessary for the proper operation of the installation.

  Moreover, the dimensional constraints imposed on the designers of ventilation, heating and / or air conditioning are such that it is increasingly difficult to extract the filtration means while the performance required in terms of filtration and loss charging only increase. Thus the filtering means is increasingly large while the space to extract is increasingly restricted. Indeed, this filtering means is very often in interference with other parts of the vehicle such as the supply tubes of the heating radiator or the evaporator mounted in the installation and / or the crankset of the vehicle.

  Thus, in the case where the constraints of dimensions and filtration performance are high causing interference with other parts of the vehicle, there is no alternative to dismantling the installation to provide an access path by means of filtration.

  One of the main drawbacks of this solution lies in the fact that it requires the dismantling of a large number of parts such as central console, dashboard, etc., which makes the cost of replacing the filtering means incompatible with its periodicity.

  Another disadvantage of the state of the art cited above is that it induces a risk of error inherent in all interventions on a vehicle requiring the dismantling of many parts.

  The object of the present invention is therefore to overcome the disadvantages described above mainly by maintaining a high level of performance of the filter in terms of filtration capacity and pressure drop on the air while making it possible to replace it in situ by means of a minimum disassembly of parts.

  The invention therefore relates to a closure device of at least one opening made in a ventilation system, heating and / or air conditioning for a motor vehicle, said opening being formed in at least two adjacent walls to introduce or extract a filtering means, characterized in that the device comprises a first part intended to close one of the two walls and a second part adapted to support at least partially the filtering means, said first and second parts extending in concurrent directions.

  According to a first characteristic of the invention, the first part and the second part extend in substantially perpendicular directions.

  According to a second characteristic of the invention, the second part comprises at a free end a tongue so as to maintain and center said device and exert a force on the filtering means.

  According to another characteristic of the invention, the first part and the second part comprise at least one rib for holding the filtering means so as to ensure a tightness to the air circulating in the installation.

  According to another characteristic of the invention, the retaining rib belonging to the second part is interrupted along its length so as to allow the evacuation of a liquid.

  According to yet another characteristic of the invention, the second part consists of a bottom and two edges which each comprise at least one guiding means.

  The first part comprises a guide pin so as to facilitate the approach of said device to close the opening.

  The invention also relates to a ventilation system, heating and / or air conditioning, characterized in that it comprises a closure device incorporating any of the previous characteristics.

  Advantageously, the opening is partially formed in a lower wall and a second wall of the installation.

  Advantageously, the opening consists of a first removal of material in the lower wall of the installation and a second removal of material in the second wall of the installation, these removals being of sizes respectively smaller than the width and the length of the filtration means.

  According to a characteristic of the invention, at least one of its walls comprises a zone for receiving the filtration means and the tongue.

  According to another characteristic of the invention, at least one of the walls further comprises at least one means for receiving the guide means, each disposed on either side of the opening.

  According to an additional feature of the invention, the first wall comprises an outgrowth adapted to cooperate with the guide pin.

  The invention also relates to the method of disassembling a filtering means of a ventilation, heating and / or air conditioning system of a motor vehicle, characterized by the following steps: disconnecting a closure device from the installation ventilation, heating and / or air conditioning, - translating substantially substantially horizontally the closure device 10 so as to disengage its guide means out of the receiving means, - translate substantially vertically the closure device, - shift the closure device so as to release an extraction opening of the filtering means, - tilting the filtering means out of the installation so as to free it from possible interference, - translating the filtering means substantially horizontally so as to extract it completely of the installation.

  A first advantage of the invention lies in the respect of filtration performance and pressure drop of the filtration means, that is to say by using a filter having a large working surface, while remaining replaceable without disassembly the installation of ventilation, heating and / or air conditioning.

  Another advantage of the invention resides in the ease of reassembly of the blind sealing device, in particular thanks to the tongue, the guiding means and the guiding pin formed on the closure device. Another significant advantage lies in the fact that lower costs resulting from the replacement of the filtration means during a periodic maintenance intervention of the vehicle.

  Other characteristics, details and advantages of the invention will emerge more clearly from a reading of the description given below as an indication in relation to drawings in which: FIG. 1 is a perspective view of a ventilation installation, partially shown in which the filtering means is installed, FIG. 2 is a perspective view of the closure device according to the invention, FIG. 3 is a perspective view of the device of FIG. shutter and the ventilation system, heating and / or air conditioning according to the invention in the vehicle environment, - Figure 4 is a perspective view of the filtration means, - Figure 5 is a perspective view of the means of filtration during extraction.

  The drawings contain, for the most part, elements of a certain character. They can therefore not only serve to better understand the description, but also contribute to the definition of the invention if necessary.

  Figure 1 generally illustrates the dimensional constraints which are at the origin of the invention. The ventilation system, heating and / or air conditioning 1 is here partially represented by showing the bottom wall 2 thereof. It is further constituted by other walls as illustrated in FIGS. 3 to 5 so as to create an interior volume in which a filtration means 3 is installed.

  This filtration means 3 is illustrated in two positions. The first position shown in solid lines shows the working position of the filtration means 3 in the installation 1 while the second position shown in broken lines shows the filtration means 3 at the beginning of its extraction. It can be seen here that when the filtration means 3 is in the first position, it can not be extracted from the ventilation, heating and / or air-conditioning unit 1 because supply tubes 4 of a heat exchanger interfere with its translation.

  A closure means 5 of the ventilation, heating and / or air conditioning system 1 is also shown in an intermediate position. A wall 6 belonging to the vehicle illustrates the maximum range of movement of the filtration means 3 when it is tilted for extraction.

  FIG. 2 is a more detailed representation of the closure device 5. The latter comprises a first part 7 intended to close one of the walls of the ventilation, heating and / or air conditioning installation and a second part 8 in contact at least partially with the filtration means 3. This contact can of course be total, that is to say over the entire length of the second portion 8, for example when the closure means 5 is secured to the installation 1. The first part 7 and the second part 8 of the closure device 5 each extend in directions that are concurrent, for example by forming a right angle.

  The second part 8 supports the filtering means 3 and exerts a force on it. It has at its free end a tongue 9 of width substantially smaller than the width of the second portion 8. This tongue 9 comprises an inclined portion 10 which cooperates with a receiving zone 11 of complementary shape (see FIG. 1) made in the wall bottom 2 of the ventilation, heating and / or air conditioning system 1.

  The second part further comprises a bottom 14 and two edges 15 and 16 each extending from the free end to the first part 7.

  The first part 7 and the second part 8 also comprise at least one retaining rib 12 which extends from the free end of the second part 8 to the free end of the first part 7. More particularly at the second part 8, it is found that the retaining rib 12 is interrupted by recesses 13 for a purpose which will be explained later. This retaining rib 12 is an integral part of the bottoms 14 and 20 and extends substantially on the same height as the edges 15, 16 and 21. In the embodiment shown in this figure, it can be seen that the second part 8 comprises three holding ribs made in a manner similar to the above description. It should however be noted that the recesses 13 of each of the retaining ribs 12 are offset relative to each other. In other words, they are arranged substantially staggered. The second part 8 through the retaining ribs 12 supports and exerts a force on the filtration means 3 when it is in the working position in the ventilation, heating and / or air conditioning system 1.

  The second part 8 also incorporates at least one guiding means 17. The latter is illustrated in this figure by way of example in two embodiments. Each of these forms cooperates with receiving means which have shapes complementary to the shapes of the guide means 17.

  The first embodiment represented under the reference 17a is a rail for fixing the closure device on the ventilation, heating and / or air-conditioning installation 1. This rail 17a is in the general form of a substantially flat protrusion protruding This edge 16 has at least two rails 17a which extend partially along the length of the edge 16, the first rail 17a being situated near the right-angle junction of the first and second parts 7 and 8 of the device. shutter 5 while the second rail 17a is installed in the vicinity of the free end of the second portion 8.

  The second embodiment of the guide means 17 is illustrated by reference 17b. It is a hook that extends partially along the length of the edge 15. This hook defines a slide which receives the corresponding receiving means formed in the lower part 2 of the ventilation, heating and / or air conditioning system. 1.

  The representation of the rails and hooks respectively 17a and 17b of the guide means 17 is of course given as non-limiting. Indeed, the second part 8 could be equipped with identical embodiments on each of these edges. Likewise, these embodiments may be advantageously molded offset from each other on each of the edges 15 and 16.

  The first part 7 of the closure device 5 comprises handles 18 which facilitate its extraction. These handles come from molding and consist of three reinforcements 18a connecting an edge 21 of the first part 7 to a gripping plate 18b.

  This first part 7 further comprises at least one stiffening groove 19 which runs through the bottom 20 of the first part 7 and the bottom 14 of the second part 8.

  Fastening studs 27 are also molded on the edges 21 and have a fixing hole for the passage of a clip, a screw or any other known means for securing the closure device 5 on the installation ventilation, heating and / or air conditioning 1.

  Advantageously, the first portion 7 comprises a guiding pin 22 installed on the edge 21. This pin 22 is an example in a generally flat and elongated shape so as to slide in an outgrow formed on one of the walls of the ventilation installation, heating and / or air conditioning 1 as will be detailed in the description of Figure 3. In the example shown here, the guide pin 22 extends parallel to the direction in which extends the second part 8 but it could also extend in a substantially perpendicular direction without departing from the scope of the invention.

  Figure 3 shows the shutter device 5 and the ventilation system, heating and / or air conditioning 1 installed in the vehicle environment. This figure is also representative of dimensional constraints imposed by car manufacturers.

  Indeed, the supply tubes 4 located in the vicinity in the upper part of the ventilation system, heating and / or air conditioning 1 and the pedal, including the accelerator pedal referenced 26, located in the vicinity of the lower part of the installation of ventilation, heating and / or air conditioning greatly hinder the extraction of the filtration means 3.

  The ventilation, heating and / or air conditioning installation 1 comprises an opening 23 which extends both through the bottom wall 2 and through an adjacent wall 24. This opening 23 is closed by the device of FIG. shutter 5 so that in operation the filtration means 3 is completely traversed by a flow of air to be treated without leakage to the outside of the ventilation system, heating and / or air conditioning 1.

  Advantageously, this opening 23 is formed by a first removal of material made in the bottom wall 2 combined with a second removal of material made in the adjacent wall 24. These material removals are smaller than the length and width of the means. filtration 3 so that it can not be introduced into the ventilation system, heating and / or air conditioning by a simple translation.

  This figure also illustrates the presence of an outgrowth 25 connected to the wall 24 whose function is to receive and guide the guide pin 22. This protrusion 25 takes the general shape of a rail in which the slider 22 slides so as to guide and assist an operator who wishes to replace the closure device 5.

  Figure 4 shows the installation of ventilation, heating and / or air conditioning 1 in its environment without the presence of the closure device. As in Figure 1, the filtering means 3 is shown in two positions, that is to say in strong line which corresponds to the working position of the filtration means 3 in the ventilation system, heating and / or air conditioning 1 and in broken line which corresponds to the position of the filtering means 3 after the tilting step of the latter to extract it from the installation 1. It is very clear here that in this second position, the filtration means no longer interferes with the supply tubes 4 and can be translated to the outside of the ventilation system, heating and / or air conditioning.

  FIG. 5 illustrates the extraction phase of the filtration means 3 which follows that explained with reference to FIG. 4. After depressing the accelerator pedal 26, the filtration means 3 is extracted from the ventilation, heating system and / or air conditioning 1 by means of a translation.

  The operation and steps of assembly-disassembly of the closure device 5 and the filtration means 3 are as follows.

  FIG. 1 more particularly illustrates the interaction that exists between the positioning of the filtration means 3 and the positioning of the closure device 5. Indeed, the introduction of the tongue 9 into the receiving zone 11 is intended to part of maintaining and centering the closure device 5 and secondly to cause a displacement of the filtering means so as to press against the wall of the ventilation system, heating and / or air conditioning opposite the lower wall 2. This force during the establishment of the closure device is obtained by means of the inclined portion 10 which during its translation tends to rise and thus press the filtering means 3.

  Thus, when the closure means closes the opening 23, the filtration means is in the position shown in solid lines in FIG. 1 or 4, where a peripheral seal is obtained thanks to the force of the closure device 5.

  In FIG. 2, the retaining ribs 12 ensure contact and sealing on the filtration means 3 while allowing any fluid to pass, for example water, which would come from a condensation resulting from a cold production. in the installation of ventilation, heating and / or air conditioning or an entrance of rainwater.

  The recesses 13 allow the flow of fluid to a condensate discharge conduit usually placed under or after an evaporator.

  The guide means 17 slide in the receiving means each disposed on either side of the opening 23 on the bottom wall 2 so as to block the closure device 5 and thus maintain the necessary force on the means of filtration 3.

  The sliding of the guiding pin 22 in the protrusion 25 has the main function of guiding the introduction of the closure means 5 at the approach of the opening 23. The cooperation of the pin 22 with the protrusion 25 has a second function which is to ensure a pivot point or rotation of the closure device 5 relative to the installation 1. In fact, the introduction of the guide means 17 in the receiving housing combined with the introduction of the tongue 9 in the receiving zone 11 is blinded by the operator because it can not visually access the bottom of the ventilation system, heating and / or air conditioning. Thus, this pivoting facilitates this double introduction without the risk of seeing the first part 7 of the closure device properly put in place while the second part 8 does not provide the necessary seal for the operation of the filtration means and the installation ventilation, heating and / or air conditioning.

  The invention also relates to a method of dismounting a filtration means 3 installed in an installation 1. This method comprises a step of separating a closure device 5 according to the invention from the ventilation, heating and / or air conditioning, in particular by removing the screws or clips that pass through the fastening studs 27.

  Disassembly is continued by translating the closure device 5 substantially horizontally so as to disengage its guide means 17 from the reception means formed on the edges of the opening 23. This translation causes a slight descent of the closure device 5 which releases the filtration means 3 from the force applied against the walls of the ventilation, heating and / or air conditioning system.

  Then, the closure device 5 is translated substantially vertically and is then shifted so as to release an opening 23 for the extraction of the filtration means. The closure device 5 can be completely removed or simply shifted to one side or the other of the opening 23.

  The next step is to switch the filtration means 5 out of the installation 1 so as to clear any interference. This tilting is a rotation about an axis located near the reception zone 11. Thus, the filtering means can leave the envelope defined by the installation and avoid the feed tubes 4.

  The filtration means 3 are then substantially horizontally translated so as to extract it completely from the installation 1, for example by bending it as shown in FIG. 5, which makes it possible to avoid the interference generated by the pedal 26.

Claims (14)

  Shut-off device (5) for at least one opening (23) in a ventilation, heating and / or air-conditioning system (1) for a motor vehicle, characterized in that the opening (23) is formed in at least two adjacent walls (2, 24) for introducing or extracting a filtration means (3) and in that the device comprises a first part (7) intended to close one of the two walls and a second part (8) in contact at least partially with the filter means (3), said first and second portions (7) and (8) extending in concurrent directions.   2. Shutter device (5) according to claim 1, characterized in that the first portion (7) and the second portion (8) extend in substantially perpendicular directions.   3. Shutter device (5) according to one of claims 1 or 2, characterized in that the second portion (8) comprises at a free end a tongue (9) so as to maintain and center said device and exercise a effort on the filter medium (3).   4. Shutter device (5) according to any one of claims 1 to 3, characterized in that the first portion (7) and the second portion (8) comprise at least one retaining rib (12) of the means of filtration (3) so as to ensure a sealing air circulating in the installation (1).   5. Shutter device (5) according to claim 4, characterized in that the retaining rib (12) belonging to the second portion (8) is interrupted along its length so as to allow the evacuation of a liquid.   6. Shutter device (5) according to any one of claims 1 to 5, characterized in that the second portion (8) consists of a bottom (14) and two edges (15, 16) which comprise each at least one guide means (17).   7. Shutter device (5) according to any one of claims 1 to 6, characterized in that the first portion (7) comprises a guide pin (22) so as to facilitate the approach of said device to close the door. opening (23).   8. Installation (1) for ventilation, heating and / or air conditioning, characterized in that it comprises a closure device (5) according to any one of the preceding claims.   9. Installation according to claim 8, characterized in that the opening (23) is partially formed in a bottom wall (2) and a second wall (24) of the installation.   10. Installation according to claim 9, characterized in that the opening (23) consists of a first removal of material in the lower wall (2) of the installation and a second removal of material in the second wall (24). ) of the installation, these removal being of smaller size respectively to the width and the length of the filtering means (3).   11. Installation according to claim 10 in combination with claim 3, characterized in that at least one of its walls (2, 24) comprises a receiving zone (11) of the filtering means (3) and the tongue ( 9).   12. Installation according to claim 11 in combination with claim 5, characterized in that at least one of the walls (2, 24) further comprises at least one receiving means of the guide means (17) each disposed on the one hand and other of the opening (23).   13. Installation according to any one of claims 9 to 12 in combination with claim 7, characterized in that the first wall (24) comprises an outgrowth (25) adapted to cooperate with the guide pin (22).   14. A method of dismounting a filtration means (3) of an installation (1) for ventilation, heating and / or air conditioning of a motor vehicle, characterized by the following steps: - disengage a closure device (5). ) of the ventilation, heating and / or air-conditioning installation (1), translating the closure device (5) substantially horizontally so as to disengage its guiding means (17) from the reception means; to translate substantially vertically the closure device 5 (5), - staggering the closure device (5) so as to release an opening (23) for extracting the filtration means (3), - tilting the filtration means (3) out the installation so as to release any interference, - translating substantially substantially horizontally the filtering means (3) so as to extract it completely from the installation (1).