Blowing machine.

Abstract

Blowing machine. The invention relates to a machine for blowing a loose insulating product comprising at least one base and a pipe (4) for transporting the insulating product, the base comprising at least one air inlet, an inlet for the loose insulating product and an outlet connected to the pipe (4), the pipe (4) comprising at least one cylindrical wall (20) which delimits a space (22) configured for the passage of the loose insulating product and air, the blowing machine comprising at least one discharge orifice (32), formed through the cylindrical wall (20) of the pipe (4), the at least one discharge orifice (32) being configured to allow the passage of air towards the outside of the pipe (4) and block the passage of the loose insulating product. Fig 2

Description

Title of the invention: Blowing machine.

[0001] The present invention relates to a blowing machine for a loose insulation product, such as glass wool, rock wool, cellulose wadding, cotton fibers or any other similar materials, the blowing machine comprising a pipe for projecting said loose insulation product.

[0002] It is common to use loose insulation products to insulate a home, and more particularly to insulate the attic of such a home. The use of a blowing machine then makes it easier to project the insulation product into the home, by blowing the insulation product from pressurized air at a high flow rate. More precisely, the insulation product is projected by means of the pipe, fluidically connected to a base of the blowing machine within which the air and said loose insulation product are mixed. The pressure and flow rate of the air in the pipe must then be sufficiently high to be able to transport the insulation product from the base of the blowing machine to an outlet of the pipe.

[0003] This need for significant air pressure to spray the insulating product must, however, be weighed against the disadvantages that excessively powerful spraying of insulating products can generate, including, but not limited to, the raising of dust when the loose insulating product is sprayed into residential attics and / or excessive compaction of the loose insulating product which can result in less effective insulation.

[0004] The present invention aims to overcome the drawbacks mentioned above by proposing simple, handy means applicable to existing blowing machines, making it possible in particular to improve the quality, and in particular the homogeneity, of the loose insulating product sprayed into the area of ​​the dwelling to be insulated.

[0005] In this context, the invention relates to a machine for blowing a loose insulating product comprising at least one base and a pipe for transporting the insulating product, the base comprising at least one air inlet, an inlet for the loose insulating product and an outlet connected to the pipe, the pipe comprising at least one cylindrical wall configured for the passage of the loose insulating product and air between a first opening formed at a first end of the pipe, integral with the outlet of the base, and a second opening formed at a second end of the pipe, opposite the first end along a direction of main longitudinal elongation of the pipe, the blowing machine comprising at least one discharge orifice, distinct from the first opening and the second opening, formed through the cylindrical wall of the pipe, the at least one discharge orifice being configured to allow the passage of air to the outside of the pipe and block the passage of loose insulation product.

[0006] The blowing machine can be used to spray the loose insulation product, for example glass wool, into an area to be insulated in a dwelling, for example an attic. More specifically, the pipe of the blowing machine allows the spraying of a mixture made of pressurized air and loose insulation product into the area to be insulated, the mixing being carried out in the base of the blowing machine. More specifically, the pressurized air in the pipe allows the loose insulation product to be directed from the first opening of the pipe to at least the second opening forming the outlet of the pipe, towards the area to be insulated in the dwelling, and the second opening is configured to allow the passage of the air and the loose insulation product to the outside.

[0007] The at least one discharge orifice then allows the passage of air from the space of the pipe to the outside of said pipe in order to reduce the pressure and the air flow in the pipe and thus adjust the outlet flow of the mixture without modifying the air flow in the base of the blowing machine. For this purpose, the at least one discharge orifice is configured to open both onto the inside of the pipe and onto the outside of the pipe.Reducing the outlet flow rate makes it possible in particular to avoid the raising of dust which may be present in the area to be insulated, and / or to prevent the sprayed loose insulating product from being too compacted in the final insulation, under the effect of excessive pressure from the air sprayed simultaneously with the loose insulating product and the invention makes it possible to obtain these advantages without reducing the air flow rate at the inlet of the blowing machine, which would have the effect of circulating the loose insulating product within the pipe with an insufficient speed for correct projection at the end of the pipe.

[0008] According to a characteristic of the invention, the pipe comprises at least one means for closing the at least one discharge orifice, the closing means being movable along the longitudinal direction of the pipe.

[0009] It is understood that the closure means is movable between a position covering the discharge orifice in which it allows the passage of air through the discharge orifice to be blocked and a release position in which the air can exit the pipe through the discharge orifice. The movement of the closure means makes it possible to control the pressure and the flow rate of the air according to the flow rate of the mixture of air and insulating product desired at the outlet of the pipe, at its second opening. The closure means may be, for example, a sleeve capable of sliding longitudinally around the cylindrical wall of the pipe.

[0010] According to a characteristic of the invention, the discharge orifice has a passage section less than or equal to 5 mm.

[0011] It is understood that such a dimension of the passage section of the discharge orifice, for example the diameter of the discharge orifice when the latter has a circular shape, makes it possible to limit the passage of bulk insulating product through said discharge orifice, the fibers of the insulating product being predominantly of a dimension greater than 5 mm. Such a dimensioning of the discharge orifice then forms a means of blocking the insulating product, which also allows the passage of pressurized air towards the outside of the pipe.

[0012] According to a characteristic of the invention, a filtration device is arranged to cover the at least one discharge orifice.

[0013] The filtration device helps to limit the passage of insulating product through the discharge orifice while allowing the passage of air through the pipe. Such a filtration device can be arranged to cover a discharge orifice whose passage section is less than or equal to 5 mm in order to reinforce the effect of blocking the passage of insulating product through said discharge orifice.

[0014] According to a characteristic of the invention, the filtration device is a grid arranged against the cylindrical wall. The grid may in particular comprise a plurality of holes having passage sections less than or equal to 5 mm. Advantageously, the filtration device is made of a flexible material so that the grid can match the shape of the cylindrical wall of the pipe.

[0015] According to a characteristic of the invention, the filtration device is arranged in a space defined within the cylindrical wall. In other words, the filtration device is pressed against the internal face of the cylindrical wall. In such an arrangement, the filtration device does not block the sliding of the closure means along the cylindrical wall of the pipe.

[0016] According to an example of the invention, the filtration device extends over an entire longitudinal dimension of the pipe. In other words, the filtration device extends along the entire length of the cylindrical wall delimiting the pipe and in particular along the entire inner face of the cylindrical wall. Furthermore, the filtration device may be arranged in the space of the pipe in such a way that a spacing remains between said filtration device and the cylindrical wall, the spacing being able to have a dimension of between 2 mm and 4 mm taken along a straight line perpendicular to the longitudinal direction of the pipe. Advantage is taken of such a characteristic of the filtration device in that it facilitates the insertion and maintenance of the latter in the space of the pipe.

[0017] According to a characteristic of the invention, the at least one discharge orifice extends in the cylindrical wall along an elongation axis perpendicular to the longitudinal direction of the pipe.

[0018] In other words, the discharge orifice is a straight orifice, that is to say defined by a cylindrical shape around an axis of revolution which is substantially perpendicular to the direction of circulation of the air and the loose insulating product within the conduit delimited by the cylindrical wall of the pipe.

[0019] According to an alternative of the invention, the at least one discharge orifice extends in the cylindrical wall along an elongation axis inclined relative to the longitudinal direction of the pipe. More particularly, the discharge orifice is inclined such that it extends, from the inside to the outside of the pipe, towards the first end of the pipe.

[0020] In other words, in this alternative, the discharge orifice is inclined in the cylindrical wall so that the air passing through it circulates in a direction substantially opposite to the direction of circulation of the mixture of air and insulating product in the space of the pipe. Such an inclination makes it possible to limit the passage of the bulk insulating product through the discharge orifice.

[0021] According to a characteristic of the invention, the at least one discharge orifice is closer to the second end of the pipe than to the first end. Such an arrangement of the discharge orifice on the pipe makes it possible to maintain sufficient pressure and air flow in the space delimited by the cylindrical wall to project the mixture out of the pipe through the second opening, part of the air being discharged only when approaching said second end.

[0022] According to a characteristic of the invention, the blowing machine comprises a plurality of discharge orifices, the discharge orifices being grouped on a section of the pipe capable of being completely closed by the closing means.

[0023] According to a feature of the invention, the base comprises an air circulation channel and a bulk insulation product circulation channel respectively connected to the air inlet and the bulk insulation product inlet, the air circulation channel and the bulk insulation product circulation channel being in fluid communication with the first opening of the pipe. It is understood that each of the bulk insulation product and the air is supplied separately into the base of the blowing machine before forming a mixture circulating in the pipe. A ventilation device can then be positioned in the air circulation channel in order to circulate the air under pressure and at a high flow rate in the air circulation channel and inside the pipe.

[0024] According to a characteristic of the invention, a flow control member is positioned between the circulation channels and the first opening of the pipe.

[0025] The flow control member makes it possible in particular to adjust the flow rate of the mixture of air and insulating product upstream of its entry into the pipe through the first opening of the latter.

[0026] The invention also relates to a method of insulating an area to be insulated, for example the attic of a building, in which a loose insulating product is blown by a blowing machine according to any one of the preceding characteristics.

[0027] The loose-fill insulation product may be, for example and in a non-limiting manner, mineral wool such as glass wool or rock wool. Preferably, the loose-fill insulation product is glass wool.

[0028] According to a characteristic of the method of the invention, the base of the blowing machine is supplied with air in a first step, via the air inlet and at a given flow rate, the air being mixed with the loose insulating product during subsequent steps to circulate together in the pipe towards the second opening thereof, the user being able to configure the air discharge orifice to discharge a given quantity of air between the base and the second opening.

[0029] Other characteristics, details and advantages of the invention will emerge more clearly on reading the description given below for information purposes in relation to drawings in which:

[0030] [Fig-1] is a schematic sectional view of a blowing machine according to the invention comprising at least one base and a pipe comprising at least one discharge orifice;

[0031] [Fig.2] is a schematic view of the pipe of the blowing machine of [Fig.l], the pipe comprising at least one discharge orifice;

[0032] [Fig.3] is a close-up schematic view of the at least one discharge orifice of the pipe of [Fig.2] according to a first embodiment;

[0033] [Fig.4] is a close-up schematic view of the at least one discharge orifice of the pipe of [Fig.2] according to a second embodiment;

[0034] [Fig.5] is a close-up schematic view of a means for closing the at least one discharge orifice of the pipe of the blowing machine according to the invention;

[0035] [Fig.6] is a close-up schematic view of a module comprising at least one discharge orifice, connected between a first part of a cylindrical wall of the pipe and a second part of the cylindrical wall of the pipe.

[0036] It should first be noted that while the figures set out the invention in detail for its implementation, these figures can of course be used to better define the invention, where appropriate. It should also be noted that these figures only set out examples of embodiments of the invention. Finally, the same references designate the same elements in all of the figures.

[0037] [Fig.l] illustrates a machine 1 for blowing a loose insulating product according to the invention, comprising at least one base 2 and a pipe 4 for transporting the insulating product. The base 2 comprises in particular at least one air inlet 6 and one insulating product inlet 8 which are separate from each other, the insulating product inlet 8 being connected to a bulk insulating product reservoir arranged outside the blowing machine 1 and not visible here. An air circulation channel 10 and an insulating product circulation channel 12 each extend into the base 2 of the blowing machine 1, respectively from the air inlet 6 and the insulating product inlet 8 and are connected to an outlet 14 of the base 2 connected to the pipe 4.

[0038] In order to allow the circulation of air at a high flow rate in the air circulation channel 10, the latter may, according to an example of the invention, comprise a ventilation device 16 ensuring the circulation of air from the air inlet 6 and at least up to the outlet 14 of the base 2. Still according to the example of the invention of [Fig. 1], a flow control member 18 is arranged between the air circulation channel 10, the insulating product circulation channel 12 and the outlet 14 of the base 2 and this flow control member may be configured by the user so as to mix the air and the insulating product in given proportions and adapt the quality of the insulation that can be obtained by spraying the loose insulating product into the pipe 4.

[0039] The pipe 4 comprises a cylindrical wall 20 which delimits a space 22 configured for the passage of the insulating product and the air. The space 22 extends between a first opening 24, formed at a first end 26 of the pipe 4 which is integral with the outlet 14 of the base 2, and a second opening 28, formed at a second end 30 of the pipe 4, opposite the first end 26 along a direction of main elongation P of the pipe 4, here longitudinal L.

[0040] The air circulation channel 10 and the insulating product circulation channel 12 are fluidically connected to the first opening 24 of the pipe 4, to allow the combined presence of air and insulating product in the pipe, and the second opening 28 of the pipe 4 forms an outlet end of the mixture of air and bulk insulating product from the blowing machine 1.

[0041] The ventilation device 16 present in the air circulation channel 10 is configured and dimensioned to push the mixture formed of air and the insulating product, under pressure, at least to the second opening 28 of the pipe 4, so as to facilitate the spraying of the mixture in an area to be insulated of the dwelling.

[0042] According to an example of the invention, the pipe 4 has a dimension D, taken along the longitudinal direction L, of between 10m and 20m. To obtain a blowing machine with a larger longitudinal dimension, it is then possible to arrange several pipes 4 one after the other. Furthermore, a diameter of the pipe 4 may be between 50mm and 120mm according to the invention. The pipe 4 may be made, for example, of a plastic material. It should be noted that these dimension and diameter values ​​are given as examples and are not limiting, a pipe according to the invention being able to have a dimension and a diameter with values ​​lower or higher than the values ​​mentioned.

[0043] According to the invention, the blowing machine 1 comprises at least one discharge orifice 32, distinct from the first opening 24 and the second opening 28, formed through the cylindrical wall 20 of the pipe 4. More precisely, the discharge orifice 32 forms a passage between the space 22 internal to the pipe 4, where the mixture of air and insulating product circulates, and an environment external to the blowing machine 1. In other words, a portion of the flow circulating within the pipe is able to escape from the pipe through the discharge orifice.

[0044] The discharge orifice 32 is configured to allow the passage of air towards the outside of the pipe 4, while blocking the passage of the loose insulating product towards the outside of said pipe 4. In other words, the discharge orifice 32 allows the evacuation of a portion of the air circulating in the space 22 within the pipe while channeling the insulating product within the pipe 4 to bring it from the first opening 24 to the second opening 28.

[0045] The discharge orifice 32 may be defined by a cylindrical shape around an axis of elongation A, or axis of revolution. According to a first example of the invention visible in [Fig. 3], the discharge orifice 32 may consist of a so-called straight orifice, that is to say with an axis of elongation A which is perpendicular to the longitudinal direction L of the pipe 4.

[0046] According to a second example of the invention visible in [Fig. 4], the discharge orifice 32 may be inclined, that is to say that it extends in the cylindrical wall 20 in such a way that its elongation axis A is inclined relative to the longitudinal direction L of the pipe 4 at an angle of between 10° and 80°. Furthermore, in this example of the invention, the discharge orifice 32 is inclined against the flow of air and loose insulating product. In other words, the discharge orifice extends from the space 22 towards the external environment, that is to say from the inside towards the outside of the pipe, towards the first end of the pipe 4.Advantage is taken of such a counter-current configuration in that it makes it possible to limit the occlusion of the discharge orifice 32 by the bulk insulating product during its circulation in the space 22 of the pipe 4, said insulating product circulating from the first opening 24 to the second opening 28 of the pipe 4, visible in [Fig.2].

[0047] Independently of the first example and the second example of embodiment of the discharge orifice 32, the latter may have a passage section S less than or equal to 5 mm. The passage section S of the discharge orifice 32 is taken in a plane perpendicular to the direction of elongation A of the discharge orifice. Such a dimensioning of the passage section S of the discharge orifice 32 makes it possible to limit the passage of the loose insulating product, the section and / or diameter of which is usually of the order of 5 mm.

[0048] A filtration device 34 may be arranged to cover the at least one discharge orifice 32 to limit the passage of the insulating product through the discharge orifice 32. Such a filtration device 34 may take the form of a grid comprising a plurality of holes 36 of a passage section T allowing the passage of air while blocking the passage of the loose insulating product. For example, the passage section T of each of these holes 36 may be less than or equal to 5 mm.

[0049] The filtration device 34 is arranged against one face of the cylindrical wall 20, at least partially covering the discharge orifice 32. For this purpose, the filtration device 34 is made of a flexible material making it possible to give the filtration device a partially cylindrical shape with a curvature identical to that of the cylindrical wall.

[0050] It should be noted that the filtration device 34 can be arranged in the space 22 of the pipe 4 in combination with an evacuation orifice 32 whose passage section S is less than or equal to 5 mm, such a combination reinforcing the limiting effect of the passage of the insulating product through said evacuation orifice 32.

[0051] As can be seen in particular in [Fig. 3], the filtration device is arranged in the space 22, within the cylindrical wall 20 defining the pipe 4. Such positioning of the filtration device, against the internal face of the cylindrical wall, makes it possible in particular not to form a projection on the external face of the cylindrical wall of the pipe, outside of the latter, and therefore not to block the translation of a closure means 38.

[0052] As visible in Figures 3 and 4, the filtration device 34 can be arranged in the space 22 along the entire length of the cylindrical wall 20 of the pipe 4, that is to say over substantially the entire longitudinal dimension between the first opening 24 formed at the first end 26 of the pipe 4 and the second opening 28 formed at the second end 30 of the pipe 4, so as to form a cylindrical sleeve in the space 22 of said pipe 4. Such a dimensioning of the filtration device 34 makes it possible to ensure the proper covering of each of the discharge orifices and to facilitate the positioning and maintenance of the filtration device 34 in the space 22 of the pipe 4. More particularly, the filtration device extends along the entire internal face of this cylindrical wall 20.

[0053] Furthermore, a spacing may be provided between the cylindrical wall 20 and the filtration device 34 such that the latter are not in contact with each other. According to a non-limiting example of the invention, the spacing may have a dimension, measured perpendicular to the internal face of the cylindrical wall, of between 2 mm and 4 mm.

[0054] The means 38 for closing the at least one discharge orifice 32 may, according to a non-limiting example of the invention visible in [Fig. 5], take the form of a sleeve 38 capable of sliding along the pipe 4. More precisely, the closing means 38 is movable in longitudinal translation L along the pipe 4 between a first release position, shown in solid lines in [Fig. 5] and which is such that the discharge orifices are not covered by the closing means and can allow air to pass to the outside of the pipe, and a second covering position, shown in dotted lines in [Fig. 5] and which is such that all of the discharge orifices are covered and that air cannot exit the pipe other than through the second end, with the loose insulating product.It is understood that the function of the closure means 38 is to externally close the discharge orifice 32 in order to block the passage of air through the latter. The translation of the closure means 38 can in particular be controlled manually by a user of the blowing machine 1 or via electronic remote control means, not visible. If necessary, the closure means can take an intermediate position, between the release position and the covering position, in which only a portion of the discharge orifices is cleared. It is thus possible to control the quantity of air intended to exit the pipe upstream of the second end and therefore to vary the air flow rate at the outlet of the pipe without otherwise modifying the air flow rate at the inlet of the blowing machine.

[0055] According to a characteristic of the invention, the discharge orifice 32 is formed in the cylindrical wall 20 of the pipe 4 in such a way that it is closer to the second end 30 of the pipe 4 than to the first end 26. In other words, the discharge orifice 32 is closer to the outlet of the mixture of air and loose insulating product from the pipe 4 than to its inlet into said pipe 4, so that the pressure and the circulation flow rate in the space 22 of the pipe 4 remain sufficient to bring the mixture from the first opening 24 at least to the second opening 28 of the pipe 4. This allows effective evacuation of a portion of the air circulating in the space 22 of the pipe 4 while maintaining sufficient projection of the mixture at the outlet of the pipe 4.

[0056] It should be considered that the structural and functional characteristics of the discharge orifice 32 apply mutatis mutandis to a plurality of discharge orifices 32. More precisely, the pipe 4 may comprise the plurality of discharge orifices 32 formed on its cylindrical wall 20, said discharge orifices 32 being grouped on a section 40 of the pipe 4, visible in [Fig. 2]. More particularly, the discharge orifices 32 are grouped on the section 40 of the pipe 4 which is capable of being closed in whole or in part by the closing means 38 previously described in [Fig. 5]. Each of the discharge orifices 32 may have a passage section S less than or equal to 5 mm and / or that each of said evacuation orifices 32 is covered with the filtration device described above. An elongation dimension M of the section 40 comprising the plurality of evacuation orifices 32 is then defined, taken along the longitudinal direction L of the pipe 4, and the section 40 is arranged in such a way that its elongation dimension M is strictly less than half of the dimension D of the pipe 4 previously defined. It is understood in particular that such a characteristic makes it possible to concentrate the evacuation of the air outside the space 22 of the pipe 4, on the section 40 located at the second end 30 of the pipe 4 in order to maintain sufficient pressure and flow of air from the first opening 24 of the pipe 4, necessary for the effective projection of the mixture of air and insulating product onto the area to be insulated of the dwelling.

[0057] According to another embodiment of the invention visible in [Fig. 6], the at least one discharge orifice 32 can be located on a module 42 distinct from the cylindrical wall 20 of the tube 4. More precisely, a cylindrical module 42 comprising the at least one discharge orifice 32 can be arranged between a first part 44 of the cylindrical wall 20 comprising the first opening 24, and a second part 46 of the cylindrical wall 20 comprising the second opening 28. It is then understood that the first part 44 of the cylindrical wall 20, the module 42 and the second part 46 of the cylindrical wall 20 participate in forming the space 22 of the pipe 4.It is further understood that the junction between the module 42, the first part 44 of the cylindrical wall 20 and the second part 46 of the cylindrical wall 20 is sealed so as to allow the passage of the loose insulating product only in the space 22 of the pipe 4, and the passage of air only in the space 22 of the pipe 4 and the discharge orifice 32. It should be considered that the module 42 may also comprise the plurality of discharge orifices 32 and that all of the structural and functional characteristics of the at least one discharge orifice 32 apply mutatis mutandis to the at least the plurality of discharge orifices 32 formed on the module 42.

[0058] A method of insulating a building in which a loose insulating product is blown by the blowing machine 1 will now be described by means of Figures 1 to 5.

[0059] The insulation method comprises a first step during which the base 2 of the blowing machine 1 is supplied with air at the air inlet 6 and by means of the ventilation device 16 present in the air circulation channel 10. During this first step, the user determines an air supply flow rate which conditions the air flow rate entering the base and entering the pipe at the first end 26. During a second step of the method, the base 2 of the Blowing machine 1 is supplied with bulk insulation product via the insulation product inlet 8 formed in the base 2. It should be noted that these first two steps of the process can be carried out simultaneously or successively, and in any order.

[0060] During a third step of the method, the air circulates in the air circulation channel 10 from the base 2 to the first opening 24 of the pipe 4, by means of the ventilation device 16. It is also understood that during the third step, the loose insulating product passes through the insulating product circulation channel 12 to the first opening 24 of the pipe 4. The user may be required to adjust the flow control member 18, to agree on a content of loose insulating product for a given air flow, and therefore allow more or less compact insulation to be obtained at the outlet of the blowing machine.

[0061] In a fourth step, the mixture formed by the air and the loose insulating product is projected into the space 22 of the pipe 4 by means of the air circulating at high flow rate and pressurized by the ventilation device 16. The loose insulating product is thus transported from the first opening 24 of the pipe 4 to its second opening 28 in order to be sprayed into an area of ​​the building to be insulated. It is understood that during the fourth step of the method, the discharge orifice 32 makes it possible to evacuate a portion of the air circulating in the space 22 outside the pipe 4 in order to limit the flow rate of the mixture leaving the pipe through the second opening 28, allowing the user to better control the distribution of the insulating product in the area to be insulated of the dwelling.

[0062] During this fourth step, the user who directs the pipe towards the area to be insulated can cover the discharge orifices, and in this case completely or partially, to reduce punctually the air flow at the outlet of the blowing machine and therefore the projection power of the loose insulating product. The user can thus adjust the operation of the blowing machine without having to modify the air flow at the inlet of the blowing machine.

[0063] As it has just been described, both by the description of the blowing machine and by the description of the method of use, the invention makes it possible, by means that are simple to implement, to propose a bulk insulating product blowing operation that can be adapted to confined environments in which the bulk insulating product must be deposited while avoiding raising too much dust during projection and / or that can propose insulations in which the bulk insulating product is not too compacted under the effect of excessive air pressure.

[0064] The invention as just described cannot, however, be limited to the means and configurations exclusively described and illustrated, and also applies to all equivalent means or configurations and to any combination of such means or configurations.

Claims

Claims

1. Blowing machine (1) for a loose insulating product comprising at least one base (2) and a pipe (4) for transporting the insulating product, the base (2) comprising at least one air inlet (6), an inlet for the loose insulating product (8) and an outlet (14) connected to the pipe (4), the pipe (4) comprising at least one cylindrical wall (20) configured for the passage of the loose insulating product between a first opening (24) formed at a first end (26) of the pipe (4), integral with the outlet (14) of the base (2), and a second opening (28) formed at a second end (30) of the pipe (4), opposite its first end (26) along a longitudinal (L) direction of main elongation (P) of the pipe (4), the blowing machine (1) comprising at least one discharge orifice (32), separate from the first opening (24) and the second opening (28), formed through the cylindrical wall (20) of the pipe (4),the at least one discharge orifice (32) being configured to allow the passage of air towards the outside of the pipe (4) and block the passage of the loose insulating product.,

2. Blowing machine (1) according to the preceding claim, wherein the pipe (4) comprises at least one means (38) for closing the at least one discharge orifice (32), the closing means (38) being movable along the longitudinal direction (L) of the pipe (4).

3. Blowing machine (1) according to any one of the preceding claims, in which the discharge orifice (32) has a passage section (S) less than or equal to 5 mm.

4. Blowing machine (1) according to any one of the preceding claims, in which a filtration device (34) is arranged covering the at least one discharge orifice (32).

5. Blowing machine (1) according to the preceding claim, in which the filtration device (34) is a grid (34) arranged against the cylindrical wall (20).

6. Blowing machine (1) according to any one of claims 4 or 5, wherein the filtration device (34) is arranged in a space (22) delimited within the cylindrical wall (20).

7. Blowing machine (1) according to any one of the preceding claims, wherein the at least one discharge orifice (32) is closer to the second end (30) of the pipe (4) than to the first end (26).

8. Blowing machine (1) according to claim 2, comprising a plurality of discharge orifices (32), the discharge orifices (32) being grouped on a section (40) of the pipe (4) capable of being completely closed by the closing means (38).

9. Blowing machine (1) according to any one of the preceding claims, wherein the base (2) comprises an air circulation channel (10) and a bulk insulation product circulation channel (12) respectively connected to the air inlet (6) and the bulk insulation product inlet (12), the air circulation channel (10) and the bulk insulation product circulation channel (12) being in fluid communication with the first opening (24) of the pipe (4).

10. Blowing machine (1) according to the preceding claim, wherein a flow control member (18) is positioned between the circulation channels (10, 12) and the first opening (24) of the pipe (4).

11. A method of insulating an area to be insulated in which a loose insulating product is blown by a blowing machine (1) according to any one of the preceding claims.

12. Insulation method according to the preceding claim, during which the base (2) of the blowing machine (1) is supplied with air in a first step, via the air inlet (6) and at a given flow rate, the air being mixed with the bulk insulating product (8) during subsequent steps to circulate together in the pipe (4) towards the second opening (28) thereof, the user being able to configure the air discharge orifice (32) to discharge a given quantity of air between the base (2) and the second opening (28).

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