FR3077360A1 - CONNECTING FITTING OF A VENTILATION SHEAT WITH A VENTILATION HOUSING - Google Patents

Abstract

The invention relates to a connection (1) for connecting a ventilation duct (2) with a ventilation casing (3). The stitching consists of a tubular element (4) cooperating with a receiving nozzle (5) integrated into the box, the tubular element (4) being provided on the one hand with a peripheral rib projecting from its outer wall, the sheath (2) receiving said tubular element (4) by crossing the peripheral rib, and secondly two lugs arranged along a diameter of the tubular element (4), the receiving nozzle (5) being provided with one part of two passage lights each lug and secondly a helical ramp traversed by said lugs to ensure tight tightening of the sheath (2) in the nozzle (5).

Description

The technical sector of the present invention is that of ventilation boxes provided with connection stitching with connection ducts.

The so-called VMC (controlled mechanical ventilation) boxes are installed in residential houses or in buildings for professional use to ensure permanent air renewal to ensure the comfort of the occupants and avoid the risk of mold. To this end, the stale air is extracted in the service rooms such as the kitchen, the bathroom, the toilets, etc ... by the electric motor of the box followed by a turbine allowing to suck the air in a volume into which there are nozzles. These nozzles are of course intended to be connected to the suction outlets of the parts using ducts. Conventionally, these sheaths incorporate metallic or synthetic turns in order to maintain their circular shape and thus ensure their mechanical strength.

In a traditional box, all the nozzles are connected to this same suction volume, acting as an expansion chamber itself connected to the suction intake of the fan.

It is understood that the connection between the sheath and the connection constitutes a strategic point of the entire installation because this connection must guarantee:

- durable and reliable mechanical maintenance over time,

- a perfect seal to avoid leaks during aspiration to ensure the correct extraction rate of each part.

Patent FR-2995066 illustrates the production of a nozzle provided with a thread with fixed or variable pitch from its distal end on which the sheath is inserted.

The thread is followed by a groove for receiving a collar for fixing the sheath to the nozzle. The main drawback of this stitching lies in the fact that the seal is based solely on the tightening of the sheath by the collar. It is understood that the realization of the CMV involves hazards without guarantee of a seal over time. Finally, the sheath always remains outside the box.

Patent EP-2228607 describes a stitching similar to that described above in which the thread is replaced by lugs distributed over the surface of this stitching, the stitching being inserted in the sheath and being fixed using a collar.

The patent US-2807432 describes the fixing of a sheath on a nozzle using a pin which does not confer any reliability on the fixing.

The object of the present invention is to provide a connection connection of a sheath with a VMC box making it possible to obviate the drawbacks of the prior art.

The subject of the invention is therefore a connection connection of a ventilation duct with a ventilation box, characterized in that it consists of a tubular element cooperating with a receiving nozzle integrated into the box, the tubular element being provided on the one hand with a peripheral rib projecting from its outer wall, and on the other hand with two lugs arranged along a diameter of the tubular element, the sheath receiving said tubular element by crossing the peripheral rib, the receiving nozzle being provided on the one hand with two lumens for the passage of each lug and on the other hand with a helical ramp traversed by said lugs making it possible to tightly tighten the sheath in the nozzle.

Advantageously, the peripheral rib has a substantially frustoconical profile whose lateral wall is increasing from the distal end of the tubular element towards its proximal end.

Advantageously also, the peripheral rib is disposed on the side of the distal end of the tubular element and the lugs on the side of the proximal end of said tubular element.

According to another characteristic of the tapping according to the invention, the helical ramp is in the form of two half-ramps each provided with a stopper.

Advantageously also, each half-ramp is carried by a semi-cylindrical casing extending the nozzle.

Advantageously also, the half-ramps are made in the thickness of each semi-cylindrical envelope.

Advantageously also, the half-ramps are formed by the terminal edge of each semi-cylindrical envelope.

According to yet another characteristic of the connection according to the invention, the distal end of the tubular element is bevelled.

According to yet another characteristic of the stitching according to the invention, said sheath is reinforced by metal or plastic turns.

The invention also relates to a method of fixing a connection tap of a ventilation duct having turns oriented in a first direction of rotation with a ventilation box according to any one of the preceding claims, characterized in that the tubular element is introduced into the free end of the ventilation duct until the peripheral rib is crossed by at least two turns of the duct, the sheath thus equipped is introduced into the nozzle by inserting the pins in the slots and the sheath is screwed in a second reverse direction of rotation from the first until the lugs are locked relative to the helical ramp.

A very first advantage of the present invention lies in obtaining an almost perfect seal of the sheath relative to the box.

Another advantage of the present invention lies in the long-term mechanical maintenance of the sheath on the nozzle.

Yet another advantage of the present invention lies in the use of the invention without additional accessories such as adhesive tapes and / or clamps.

Yet another advantage of the present invention lies in the saving of time for the installer who implements simple assembly operations.

Another advantage of the present invention lies in the simplicity of carrying out the stitching.

Other characteristics, details and advantages of the invention will be better understood on reading the additional description which follows of embodiments given by way of example in relation to the drawings in which:

FIG. 1 is an exploded view of the tapping elements according to an embodiment of the invention,

FIG. 2A is a view of the tubular element according to an embodiment of the invention,

FIG. 2B is another view of the tubular element according to the same embodiment of the invention,

FIG. 2C is a sectional view of a tubular element according to an embodiment of the invention,

- Figure 3A is a view of the receiving nozzle according to an embodiment of the invention, Figure 3B is a sectional view of the receiving nozzle according to an embodiment of the invention Figure 4A is a view in section of the receiving nozzle and the tubular element joined, and

- Figure 4B is an enlarged view of the junction between the receiving nozzle and the tubular element.

The invention will now be described in more detail. In the context of the present invention, the expression “ventilation box” is understood to mean a ventilation device making it possible to ensure good air quality inside an enclosed space.

FIG. 1 represents an exploded view of the elements making up the tap 1 according to the invention. The tap 1 includes a tubular element 4 and a receiving nozzle 5 integrated directly into the ventilation box 3.

The ventilation box 3 generally consists of an electric motor and a turbine creating a vacuum and making it possible to draw the air into a volume on which open ventilation ducts 2 connected to the nozzles. Conventionally, the ventilation boxes have a main connection with a diameter between 120 mm and 130 mm and at least four secondary connections with a diameter between 75 mm and 85 mm.

The main tapping is generally connected to a room like the kitchen and the secondary tapping to rooms like the sanitary (bathroom, WC, laundry, etc ...). They are generally equipped with a regulation system allowing the obtaining of a desired flow with respect to the ventilated room.

The ventilation duct 2 according to the invention may be made of a material such as flexible PVC reinforced with metallic or plastic turns having a helical profile. PVC can obviously be replaced by any other material having similar properties.

According to the embodiment of the invention shown in FIG. 1, the ventilation box 3 comprises four reception nozzles 5 corresponding to the different nozzles which are generally used to ventilate rooms such as the sanitary facilities (bathroom, WC, laundry room, etc ...). The ventilation box 3 also includes a larger diameter tap which is generally used to ventilate a room such as the kitchen and which is seen in the central position. The ventilation duct 2 is also shown in FIG. 1 and we note the presence of helical turns according to 6, of which

The interest will be indicated in the following description.

It goes without saying that the sheath can be of any kind usable in a CMV.

Thus, this sheath can be made of a semi-rigid plastic or rubbery material, or semi-flexible reinforced with metallic or plastic turns.

Thus, the tubular element is intended to be inserted on one side in the ventilation duct 2 and on the other side in the receiving nozzle 5 so as to connect the ventilation duct 2 to the ventilation box 3 by imprisoning it. sheath.

The figure

2A represents

The tubular element 4 according to an embodiment of the invention.

The tubular element takes the form of a tube with a diameter substantially smaller than the diameter of the ventilation duct 2.

Conversely, the diameter of the ventilation duct 2 is slightly greater than that of the tubular element so as to create a junction between the two as tight as possible.

Said tubular element 4 is provided on the one hand with a peripheral rib 7 projecting from its outer wall and, on the other hand with two lugs 8 of which only one is shown in FIG. 2A. The two pins 8 are arranged diametrically opposite and at the level of the proximal end 12 of the tubular element 4.

The tubular element 4 is generally made of plastic, but can also be made of any other material having the same characteristics.

Thus, the peripheral rib 4 forms a projection with a width of the order of a few millimeters, preferably between 3 mm and 10 mm. The insertion of the tubular element 4 in the ventilation duct 2 is done by crossing the peripheral rib 7 over a sufficient length or by at least two turns 6 of the ventilation duct 2 if the latter is provided.

According to the embodiment on the profile also are Figure 2A, the rib of the substantially frustoconical and increasing guide elements of the end of the invention shown peripheral 7 comprises and 10 which have one whose distal side walls 11 of the element tubular 4 towards its proximal end 12. These guide elements 9 and 10 are arranged so as to facilitate the passage of the ventilation duct 2 over the peripheral rib 7. It goes without saying that the invention is not limited to the mode shown in Figure 2A. Indeed, the guide elements 9 and 10 can be omitted and it is then the entire peripheral rib 7 which has a frustoconical profile and whose side wall 17 is increasing from the distal end 11 of the tubular element 4 towards its proximal end 12.

In the context of the present invention, the term “distal end 11 of the tubular element 4” is understood to mean the end intended to be opposite the ventilation duct 2 and the term “proximal end 12 of the element 4” means the end intended to be opposite the receiving nozzle 5.

In FIG. 2A, it can also be seen that the tubular element 4 does not have an opening at its distal end 11. The tubular element 4 is in fact provided with a closure plate 13 in which are defined patterns that can be cut, a triangle, a square and a circle. This embodiment makes it possible to adjust the flow rate of aspirated air as required. Indeed, the triangle makes it possible to adjust the stitching with a small flow, the square with a medium flow and the round with a large flow. It is also possible to leave the shutter plate 13 intact if the stitching is not functional and thus avoid pressure drops.

FIG. 2B is another view of the tubular element 4 according to an embodiment of the invention. We clearly distinguish in this figure the presence of the two pins 8 at the proximal end 12 of the tubular element 4. It goes without saying that the embodiment shown in Figure 2B is not limiting and that the tubular element 4 may comprise more than two lugs 8, in particular three, without departing from the scope of the invention.

FIG. 2C is a sectional view of the tubular element 4 according to an embodiment of the invention. The frustoconical shape of the peripheral rib 7 is clearly distinguished, the lateral wall 17 of which increases from the distal end 11 of the tubular element 4 to its proximal end 12.

According to the embodiment of the invention shown in this FIG. 2C, the distal end 11 of the tubular element 4 is bevelled so as to allow its progressive insertion into the ventilation duct 2 until conformation to the outside diameter of l tubular element 4.

It is also noted that the closure plate 13 is provided with grooves delimiting the patterns mentioned above making it possible to adjust the air flow rate of the nozzle 1.

In FIG. 3A is shown the reception nozzle 5 according to an embodiment of the invention. For reasons of clarity, the reception nozzle 5 is here represented alone but according to the invention, it is directly integrated in the ventilation box 3. The reception nozzle 5 takes the general form of a flared tube at one end and comprises at its other end two passageways 14 intended to allow the passage of the lugs 8 of the tubular element 4 so as to be able to position said lugs 8 on the helical ramp 15.

According to the embodiment of the invention shown in this FIG. 3A, the helical ramp 15 is in the form of two half-ramps 151 and 152 each provided with a stop stop 16. Each half-ramp 151 and 152 is delimited by the end edge of the semi-cylindrical casing 18a or 18b of the tube of the nozzle 5.

In FIG. 3A, the reception nozzle 5 also comprises a flaring 19 generally perpendicular to the semi-cylindrical envelopes 18a and 18b. The flaring is in fact the extension of the semi-cylindrical envelopes 18a and 18b and forms the other end of the receiving nozzle 5. The flaring 19 notably includes one or more marks 20 so as to display the lights 14 for positioning the lugs 8 of the tubular element 4.

Thus, the reception nozzle 5 according to the embodiment of the invention shown in FIG. 3B comprises two semi-cylindrical envelopes 18a and 18b separated from one another by the two slots 14. The two half-ramps 151 and 152 thus form the helical ramp 15 whose helical profile is the reverse of the helical profile of the turns 6 of the ventilation duct 2.

FIG. 3B represents a sectional view of the reception nozzle 5 according to an embodiment of the invention. We distinguish the semi-cylindrical casing 18a or 18b respectively forming a half-ramp 151 or 152 ending in a stop 16. We clearly distinguish the helical profile of the half-ramp 151 or 152. The semi-cylindrical casing 18a or 18b is extended by the flaring 19, delimiting a recess 20 so that the peripheral rib 7 of the tubular element 4 abuts against this recess 20 when the tubular element 4 is screwed into the receiving nozzle 5 .

We have previously described the half-ramps 151 and 152 formed by the free end of the envelope 18. It goes without saying that these half-ramps can be produced in the thickness of the envelope and according to the same profile. Those skilled in the art can easily carry out such a configuration without carrying out complex operations.

According to an embodiment of the invention not shown, the reception nozzle comprises three ramps forming the helical ramp. It follows from this embodiment that the receiving nozzle therefore comprises three slots intended to accommodate three pins present on the tubular element.

FIG. 4A is a sectional view of the reception nozzle 5 and of the tubular element 4 in the junction position. In this figure, the ventilation duct 2 is not shown for reasons of clarity.

The tubular element 4 is inserted, at its distal end 12, into the receiving nozzle 5 integrated or molded directly in the ventilation box (not shown). The lugs 8 of the tubular element 4 are positioned opposite the lights (not visible) of the receiving nozzle 5. The lugs 8 are found at the end of the journey at the level of the half-ramps 151 or 152 and the junction between the nozzle 5 and the tubular element 4 is made by screwing. The lugs 8 run through a rotation movement of the half-ramps 151 or 152 until they reach the stops 16 and / or until the peripheral rib 7 is attached to the recess 20 of the receiving nozzle 5 .

The lugs consist of a small piece taking the overall shape of a parallelogram projecting at the level of the proximal end 12 of the tubular element 4. The upper face of each lug 8, oriented towards the distal end 11 of the tubular element 4 is intended to come into contact with the respective end edges of the two semi-cylindrical casings 18a and 18b of the receiving nozzle 5. It goes without saying that if the tubular element 4 has three lugs 8, the nozzle reception then comprises three semi-cylindrical envelopes. More generally, the number of semi-cylindrical envelopes is equal to the number of lugs that the tubular element comprises.

We understand that these are the cooperation between the peripheral rib and the recess 20, as well as between making a the half-ramps junction of the

151 and 152 which allow ventilation duct 2 in box 3 stable, reliable and waterproof to minimize air leakage and ensure a good air extraction rate in each room.

According to an embodiment of the invention not shown in a figure, the lugs 8 and / or the half-ramps

151 and 152 have complementary roughness so as to increase friction, adhesion and support between the receiving nozzle 5 and the tubular element

FIG. 4B is an enlargement of the junction between the receiving nozzle 5 and the tubular element 4. In this figure, only the turns 6 of the ventilation duct are shown.

The ventilation duct (not shown entirely on part of the tubular element 4 as far as an area located between the peripheral rib and the proximal end 12 while leaving visible.

Note that once the element has been screwed into the nozzle 5, at least two turns or the end of the sheath are interposed between the recess 20 and the peripheral rib 7. This is made possible by the winding helical turns 6 of the sheath which is

The opposite of the helical profile of the ramp

15. The screwing in the opposite direction of the helical profile of the turns allows them to come closer to each other and come to be interposed between the peripheral rib 7 and the recess. This results in greater sealing of the junction between the receiving nozzle 5 and the tubular element 4 inserted in the ventilation duct.

Thus, the method of fixing the connection 1 of the ventilation duct 2 with the ventilation box 3 according to the invention is greatly facilitated while guaranteeing a functional, stable and waterproof installation.

The fixing method comprises the introduction of the tubular element 4 into the free end of the ventilation duct 2 until the peripheral rib 7 is crossed by at least two helical profile turns of the rotation. The introduction ventilation duct 2 is sheathed according to the element made by its having a first tubular direction end one of in the distal

The free end of the sheath therefore in a zone between ventilation 2 is found the peripheral rib and the proximal end 12 of the tubular element 4.

Then, the sheath 2 thus equipped is introduced into the nozzle 4 by inserting the lugs 8 into the slots 14 and the sheath 2 is screwed in a second reverse direction of rotation from the first until the lugs 8 are locked relative to the helical ramp 15.

Claims (10)

1. Connection (1) connecting a ventilation duct (2) with a ventilation box (3), characterized in that it consists of a tubular element (4) cooperating with a receiving nozzle (5 ) integrated into the box, the tubular element (4) being provided on the one hand with a peripheral rib (7) projecting from its outer wall, the sheath (2) receiving said tubular element (4) by crossing the rib peripheral (7), and on the other hand two lugs (8) arranged along a diameter of the tubular element (4), the receiving nozzle (5) being provided on the one hand with two passage openings (14) of each lug (8) and on the other hand of a helical ramp (15) traversed by said lugs (8) enabling tight tightening of the sheath (2) in the nozzle (5). 2. Connection (1) connecting a ventilation duct (2) with a ventilation box (3) according to claim 1, characterized in that the peripheral rib (7) has a substantially frustoconical profile, the side wall of which ( 17) is increasing from the distal end (11) of the tubular element (4) towards its proximal end (12). 3. Connection (1) connecting a ventilation duct (2) with a ventilation box (3) according to claim 1 or 2, characterized in that the peripheral rib (7) is arranged on the end side distal (11) of the tubular element (4) and the pins (8) on the side of the proximal end (12) of said tubular element (4). 4. Tapping (1) connecting a ventilation duct (2) with a ventilation box (3) according to any one of the preceding claims, characterized in that the helical ramp (15) is in the form of two half-ramps (151, 152) each provided with a stopper (16). 5. nozzle (1) connecting a ventilation duct (2) with a ventilation box (3) according to claim 4, characterized in that each half-ramp (151, 152) is carried by a semi-envelope cylindrical (18a, 18b) extending the nozzle (4). 6. Tapping (1) connecting a ventilation duct (2) with a ventilation box (3) according to claim 5, characterized in that the half-ramps (151, 152) are formed in the thickness of each semi-cylindrical envelope (18a, 18b). 7. Tapping (1) connecting a ventilation duct (2) with a ventilation box (3) according to claim 5, characterized in that the half-ramps (151, 152) are constituted by the terminal edge of each semicylindrical envelope (18a, 18b). 8. Connection (1) connecting a ventilation duct (2) with a ventilation box (3) according to any one of the preceding claims, characterized in that the distal end (11) of the tubular element (4) is beveled. 9. Connection (1) for connecting a ventilation duct (2) with a ventilation box (3) according to any one of the preceding claims, characterized in that said duct (4) is reinforced by metal turns or made of plastic. 10. Method for fixing a nozzle (1) for connecting a ventilation duct (2) having turns oriented in a first direction of rotation with a ventilation box (3) according to any one of the preceding claims, characterized in that the tubular element (4) is introduced into the free end of the ventilation duct (2) until the peripheral rib (7) is crossed by at least two turns of the duct (2), the sheath thus equipped is introduced into the nozzle (4) by inserting the lugs (8) into the slots (14) and the sheath (2) is screwed in a second reverse direction of rotation from the first until the lugs (8) lock ) relative to the helical ramp (15).