BRPI0408283B1 - NEBULIZATION DEVICE AND PROCESS - Google Patents

Abstract

"nebulization process and device". The misting device comprises a liquid reservoir, a liquid supply conduit in a misting zone and a misting zone exhaust opening through which the flow of misted liquid particles escapes from the misting zone. According to the invention, the exhaust opening flows into the liquid reservoir above the liquid level and the liquid reservoir comprises a nebulized liquid particle release aperture whereby a portion of the nebulized liquid particles from the exhaust port leave the reservoir. Alternatively, the device comprises an open air inlet conduit having a connection in the misting zone and an open air opening in the liquid reservoir.

Description

(54) Title: DEVICE AND NEBULIZATION PROCESS (51) Int.CI .: B05B 7/00 (30) Unionist Priority: 11/03/2003 FR 0303316 (73) Holder (s): PROLITEC S.A.

(72) Inventor (s): KARIM BENALIKHOUDJA

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Descriptive Report of the Invention Patent for DEVICE AND NEBULIZATION PROCESS.

[001] The present invention relates to a process and a nebulizer device, which comprises a nebulizer nozzle which can be the object of the filing of the patent application for Nebulizer nozzle and device that comprises it, made that same day by applicant.

[002] The invention applies, in particular, to devices for the propagation of liquids, for example, the propagation of perfumes, liquid fuels, etc.

[003] The first purpose of the present invention is to obtain fine particles of liquid dispersed in the air.

[004] Currently known nebulization devices have an open nebulization zone towards the exit of nebulized liquid particles from that device. It follows that large particles escape from the device, or a means of recovering those large particles must be provided in the device. The present invention seeks to prevent these drawbacks.

[005] According to a second aspect, the present invention aims at a nebulization device that comprises a liquid reservoir, a liquid supply duct in a nebulization zone and an exhaust opening in the nebulization zone through which the flow of nebulized liquid particles escapes from the nebulization zone, characterized by the fact that this escape opening flows into the liquid reservoir above the liquid level and the fact that the liquid reservoir contains an opening for the release of nebulized liquid particles, through which a part of the nebulized liquid particles from the exhaust port leaves the reservoir.

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2/16 [006] Thanks to these provisions, the thickest nebulized liquid particles are deposited, by gravity effect or due to their inertia, in the reservoir where they join the liquid to be nebulized.

[007] According to particular characteristics, the nebulizer device comprises a nebulizer nozzle that comprises an air inlet duct under pressure, the air inlet duct and the liquid supply duct, each presenting at least one nozzle system that flows into a nebulization zone in which air under pressure from the air inlet line nebulizes the liquid from the liquid supply line and a means of regulating the position of the distribution nozzle of the air supply line. liquid. The device thus presents the advantages exposed with the first aspect of the present invention.

[008] According to particular characteristics, the device comprises a free air inlet duct that has a distribution nozzle in the nebulization zone and an open air opening in the liquid reservoir. Thanks to these arrangements, a part of the flow of nebulized liquid particles returns to the nebulization zone, via the free air inlet duct, and the particle concentration of the flow is thus increased.

[009] According to particular characteristics, the device includes:

- an air suction duct with a distribution nozzle in the nebulization zone and, in another opening of the air suction duct, a depression trap; and

- a means of processing a signal from that pickup and representative of the depression inside the suction duct.

[0010] According to particular characteristics, the conduit of

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3/16 suction also includes an open air opening in the liquid reservoir.

[0011] Other advantages of each of these characteristics having been indicated above, are not remembered here.

[0012] The present invention also aims at a nebulization process to a nebulization process, which comprises:

- a liquid aspiration stage to be nebulized in a reservoir;

- a liquid injection stage to be nebulized in a nebulization zone, characterized by the fact that it also includes:

- a projection stage of the nebulized liquid particles, from the nebulization zone in that reservoir above the level of the liquid in the reservoir; and

- a step of leaving the reservoir of a part of these nebulized liquid particles.

According to particular characteristics, the process also includes:

- an air aspiration stage in the reservoir; and

- a step of injection of the air sucked into the reservoir in the nebulization zone.

[0013] According to particular characteristics, the process also includes:

- a pressure measurement step in the nebulization zone; and

- a treatment step for that measure.

[0014] According to particular characteristics, during the treatment stage, the operation of an air compressor is stopped or an alarm signal is generated, when the pressure measurement meets predetermined variation criteria.

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4/16 [0015] According to particular characteristics, the measurement step is made by a depression measurement pickup located in a suction duct that has an open-air opening and a distribution nozzle in the nebulization zone.

[0016] The advantages and purposes of the process, corresponding to those of the nebulization device summarized above, are not remembered here.

[0017] Other advantages, purposes and characteristics of the present invention will stand out from the description that will be made below, in relation to the attached drawings, in which:

figure 1 represents, in cross-section, a nozzle according to a first particular embodiment of a first aspect of the present invention;

- figure 1a represents, according to an enlarged scale, details of figure 1;

figure 2 represents, in cross-section, a mouthpiece of a second particular embodiment of a first aspect of the present invention;

figure 3 represents, in section, a nozzle according to a third particular embodiment of a first aspect of the present invention;

figure 4 represents, in cross-section, a nozzle according to a fourth particular embodiment of a first aspect of the present invention;

figure 5 represents, in cut-away perspective, a nozzle according to another particular embodiment of the first aspect of the present invention;

figures 6 and 7 represent, in cross-section, a particular embodiment of a nebulizer device, according to another aspect of the present invention;

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- figure 8 represents a detailed view of the figure

6;

figure 9 represents a nebulizer device that includes alarm generation means;

figure 10 schematically represents an organization chart of operation of a nebulizer device, according to a particular embodiment of a process object of an aspect of the present invention;

figure 11 schematically represents a plug adaptable to the embodiments, illustrated in figures 6 to 9; and

figure 12 represents, schematically, a variant of the liquid supply duct distribution nozzle shape that can be used in each of the embodiments of the present invention;

figures 13 and 14 represent perspective views of an open (figure 13) and closed (figure 14) box provided for receiving the device, according to the invention.

[0018] In each of the figures 1 to 4, a nozzle 61 to 64 is observed, respectively, which each comprises a nozzle body, an air intake duct 10, a liquid supply duct to be nebulized 20, a nebulization zone 30, in which there is a distribution nozzle 15 of the air inlet duct 10 and a distribution nozzle 25 of the liquid supply duct 20, an open air duct 40 which has a nozzle distribution zone 45 in the nebulization zone 30, the nebulization zone being formed in the nozzle body and the different ducts that penetrate this body, more precisely those ducts being fitted into open perforations in the nozzle body, an appropriate tightness being

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6/16 realized between the external cylindrical faces of the ducts and the cylindrical faces of the corresponding perforations. It can be seen that the conduit 20 penetrates the nebulization zone 30, which is formed by a cylindrical chamber. It can be seen that the conduit 20 can be formed from a continent part and a contained part mounted on the continent part, according to an arrangement of the compressed or slightly compressed type, the distribution nozzle 25 being disposed at the end of the contained part. The type of arrangement may allow the part contained in the continent to slide or prevent it. [0019] It can also be seen that the distribution nozzle 45 is in a geometric plane perpendicular to the longitudinal axis of the conduit 40 and that the distribution nozzle 15 is arranged according to a geometric plane perpendicular to the longitudinal axis of the conduit 10. see also that the longitudinal axes of the ducts 10, 20 and 40 are secant to each other, that the longitudinal axis of the duct 10 is perpendicular to the longitudinal axes of the ducts 40 and 20. It can also be seen that the ducts 40 and 20 are axially aligned.

[0020] The air intake duct 10 is connected to a compressor (figure 9) that provides it with air under pressure, for example, between 1 and 10 times the atmospheric pressure. The liquid supply line to be nebulized 20 is connected, at one end, to a reservoir of liquid to be nebulized (figures 6, 7 and 9). In the nebulization zone 30, the distribution nozzle 15 of the air inlet duct 10 and the distribution nozzle 25 of the liquid supply duct 20 are positioned respectively so that, by Venturi effect, the liquid is aspirated in the nebulization zone 30 , where the air flow from the dispensing nozzle 15 causes the generation of a flow of nebulized liquid particles, directed to an outlet 50 of the nebulization zone 30, in a known manner.

[0021] It is observed that the nozzle 61 to 64 contains a means of

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7/16 regulation 70 of the position of the dispensing nozzle 25 of the liquid supply line 20. The adjustment can be operated by longitudinal sliding and / or rotation of the liquid supply line 20 in the nozzle 61 to 64. For this purpose, the The liquid supply duct may have a filleted section and the perforation of the nozzle body intended to receive this duct will be regulated, the duct filleting cooperating in this case with the regulation of the drilling. With this solution, the axial displacement of the conduit is inseparable from its placement in rotation. According to a variant of execution, the liquid suction duct 20 and the corresponding perforation are smooth, which allows the longitudinal disposition of the duct regardless of its rotation arrangement.

[0022] Adjusting the position of the dispensing nozzle 25, using regulation means 70, allows to vary the operating parameters of the nozzle 61 to 64, to compensate, at least partially, for manufacturing dispersions and to adapt the flow of particulate matter. nebulized liquid with each use. By moving the dispensing nozzle 25 longitudinally, at least one average diffusion angle of the nebulized liquid particles is regulated in relation to the axis of the air inlet 10.

[0023] In figure 1, connections 15 and 25 touch, with a thickness close to the conduit 25. In figure 2, on the contrary, the distribution nozzle 25 is separated from the distribution nozzle 15 by a distance of the same order of magnitude than the diameter of the dispensing nozzle 25, that is, between half and three times that diameter.

[0024] In figure 3, the same elements are observed as in figure 2, to which is added a conical widening 75 that axially extends the nebulization zone 30. In figure 4, the same elements are observed in figure 3, to which add a

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8/16 prolongation of the conical enlargement 75 in the form of a cylindrical chamber 80 that acts as a diaphragm, that is, laterally retaining the flow of nebulized liquid particles. Thus, the coarsest particles, which are usually located on the sides of this flow, are deposited on the cylindrical side surface of chamber 80 and flow under the effect of gravity, to be recovered either in the nebulization zone or in the liquid reservoir. fogging (see figures 6 to 8).

[0025] It can be seen in figures 1 to 3 that connections 25 and 45 are arranged in parallel geometric planes, and that the distribution nozzle 25 is in a geometric plane perpendicular to the longitudinal axis of the conduit 20, whereas in figure 4 you can see that the liquid inlet delivery nozzle 25 does not show symmetry of revolution with respect to the axis of the liquid supply line: the plane of the delivery nozzle 25 has a different angle in relation to the longitudinal axis of the duct 25 90 degrees. As variants, the absence of symmetry of revolution translates into a non-circular shape of the duct 20. The regulating means 70 is adapted to regulate at least the angular position of the liquid inlet distribution nozzle 25, in relation to the supply duct. of liquid 20. The rotation of this conduit 20 makes it possible to vary the operation of the nozzle 64.

[0026] Although this is not shown in the figures, as a variant, the adjustment means 70 for the position of the dispensing nozzle 25 allows, in addition, an adjustment of the distance between that dispensing nozzle 25 and the dispensing nozzle 15 along the dispensing nozzle axis 15, adjusting the distance between that dispensing nozzle 25 and the dispensing nozzle axis 15 and / or adjusting the angle between the axes of connections 15 and 25, according to known mechanical means.

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9/16 [0027] In each of the figures 1 to 4, it is possible to observe the free air inlet duct 40 that flows into the nebulization zone 30, through the distribution nozzle 45 and from which another opening is outdoors. , for example, in the liquid reservoir to be nebulized (see figures 6 to 8). The shape and / or position of the distribution nozzle 45 of the free air inlet duct in the misting zone 30 causes the aspiration of free air in that zone, for example, by the Venturi effect or by the effect of the depression generated on the sides of the nebulization zone 30, by the air flow injected through the distribution nozzle 15. The inventor observed that the presence of the free air inlet duct 40 allowed to increase the efficiency of each nozzle 61 to 64, in relation to the same nozzle that would not be equipped with this free air inlet duct 40.

[0028] In figure 5, a nozzle 65 is observed, comprising an air inlet duct 10, a cylindrical duct 85 for the supply of liquid to be nebulized on one side and for the supply of free air on the other side, a zone of nebulization 30, in which there is a distribution nozzle 15 for the air inlet 10 and two openings 86 and 87 for the duct 85. The duct 85 is adapted to slide in an open cylindrical hole in the body of the nozzle 65. In this way, the adjustment means 70, constituted by this perforation, allows the conduit 85 to slide both in rotation, in relation to its axis, and in translation along its axis, which allows to vary the position of the openings 86 and 87 in relation to to the distribution nozzle 15 and therefore constitutes the parameters for regulating the operation of the nozzle 65. Outside the openings 86 and 87, the conduit 85 has an opening in one of its ends and an opening in a reservoir at the other end. of liquid to be nebulized.

[0029] The openings 86 and 87 are circular and have diameters roughly equal to the diameter of the nozzle 15. They are

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10/16 placed symmetrically in relation to the longitudinal axis of the conduit 85. They are, therefore, diametrically opposite.

[0030] In figures 6 to 8, a liquid reservoir to be nebulized 100, a liquid supply conduit to nebulize 120 consisting of a hollow rod is 121 immersed in the liquid contained in the reservoir 100 and a secondary conduit 122 inserted in a nozzle 160, this secondary conduit being in communication relationship with the conduit 120. The nozzle 160 is supported on a container nozzle by means of a centering ferrule 161 independent or rooted in a nozzle body. A tamper evident ring 162 is positioned around the upper part of the container and comes through a locking ring 163 which it presents at the top, in support against the centering ferrule 161. That tamper evident ring 162 is fixed indeasably on the top of the container. On the other hand, the nozzle 160 is covered with a cap 164, in which an air inlet duct 110a and an outlet duct of the nebulizer 195 are formed.

[0031] The air inlet duct 110a is advantageously extended by a watertight connection tip 110b to a source of air under pressure, for example, the compressed air outlet of a compressor. This connecting tip 110b can be vertical, as shown, and extend downwards or upwards, but this tip can also occupy a horizontal position.

[0032] The cap 164 is fixed to the centering ferrule 161 by screws and covers the locking ring 163 that has the tamper evident ring 162. Each of the screws is fitted in a hole through a ferrule 161 and in a limit adjustment made in cap 164. From that part of the arrangement, the heads and screws are in the internal volume of the reservoir or in front of it and thus are inaccessible.

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11/16 [0033] Thus, after fixing the tamper evident ring 162 on the container, it will no longer be possible to dismantle the nozzle, without destroying the ring, and have access to the contents of the container.

[0034] This device may then be for single use and disposable, after the liquid contained in the reservoir is exhausted. [0035] To reinforce security, preventing the introduction into the device and notably into the reservoir of foreign body or liquid and, in this case, before or after the complete exhaustion of the liquid initially contained in the reservoir, the different ducts accessible from the outside of the device may be equipped with safety means, such as check valves and other.

[0036] The nozzle 160 comprises an air inlet duct 110 in relation to the open duct 110a in the cover, the secondary duct 122, a nebulization zone 130 in which a distribution nozzle 115 of the inlet duct is located. air 110 and a dispensing nozzle 125 of the liquid supply line 120, an outlet 150 of the nebulizing zone 130, a means for regulating 170 of the position of the secondary conduit 122, a conical widening 175 extending the outlet 150 of the nebulizing zone and a cylindrical chamber 180 extending the tapered widening. Adjustment means 170 consists of a micrometric pitch screw. The base 160 may, in addition, have an open air duct 140 which has a dispensing nozzle 145 in the spray zone 130. That free air duct will be in communication relationship with a through duct 140a open in the lid. [0037] Preferably, the liquid line to be nebulized 121 comprises a filter 121a at the lower end. This filter dives into the liquid present in the reservoir.

[0038] The open air duct and the suction duct 140 also presents:

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- an opening 142 for receiving a depression pickup (see figure 9).

[0039] In the nebulization zone 130, the distribution nozzle 115 of the air inlet duct 110 and the distribution nozzle 125 of the liquid supply duct 120 are positioned respectively so that, by the Venturi effect, the liquid is aspirated in the area nebulizer 130 where the flow of air leaving the dispensing nozzle 115 causes the generation of a stream of nebulized liquid particles, directed to the outlet 150 of the nebulizer zone 130 in a known manner.

[0040] The inventor observed that the presence of the free air inlet duct 140 allowed to increase the nozzle 160 yield, in relation to the same nozzle that would not be provided with this free air inlet duct 140. In addition, since the Aspiration draws in air in chamber 180, part of the flow from the nozzle is reinjected into the nebulization zone, which increases the concentration of nebulized liquid particles in the flow that leaves chamber 180. [0041] of the present invention, the exhaust opening 190 through which the flow out of the chamber 180 leaves the nozzle 160 flows into the liquid reservoir 100 and the liquid reservoir 100 comprises an opening for the release 195 of the nebulized liquid particles through which part of the nebulized particles from the exhaust opening 190 leave the reservoir 100 and the nebulizer liquid to be propagated in the atmosphere surrounding that nebulizer device.

[0042] Thus, the thickest nebulized liquid particles are deposited, due to gravity or due to their inertia, in reservoir 100 where they join the liquid to be nebulized.

[0043] Preferably, the exhaust opening 190 is

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13/16 directed to the surface of the liquid contained in the reservoir.

[0044] It is observed, in figure 9, a nebulizer device 200 that comprises the reservoir 100 and the nozzle 160, a compressor 210, an electrical supply 220 of the compressor 210, a pressure sensor 230, a treatment medium 240, an alarm signal generator 250, an audible emitter 260, a display 270 and a computer network 280.

[0045] The pressure sensor 230 is positioned over the opening 142 of the conduit 140 and emits a signal representative of the pressure (or depression) on the sides of the nebulization zone 130. The treatment medium 240, for example, an electronic card (possibly with microprocessor), a computer or a limit circuit, receives the signal emitted by the pressure sensor 230 and, according to predetermined variation criteria for this signal, causes the generation of alarm signals by the alarm signal generator 250, destined for the sound emitter 260, the display 270 and / or the computer network 280. [0046] The predetermined criteria are, for example:

- the decrease in pressure measured below a threshold level and / or

- the measured pressure drop of at least 10% in less than 5 minutes.

[0047] The inventor found, in effect, that when there is no more liquid in the dispensing nozzle 125, the value of the depression captured by the pressure sensor 230 is different from the value of the depression, when that distribution nozzle contains liquid to be nebulized . In the embodiment illustrated in figures 6 to 9, the measured pressure value is, when there is no more liquid in the dispensing nozzle 125, less than it is when there is still liquid to be nebulized in the dispensing nozzle 125.

[0048] The alarm signal generator 250 is adapted to

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14/16 command:

- the emission of sound signals by the sound emitter 260, for example, consisting of a loudspeaker;

- the emission of visible signals through the display 270, for example, consisting of an electroluminescent diode and / or

- the transmission of alarm signals by the computer network 280, for example, consisting of a filar or non-filar link connected to an acquisition card, itself connected to a computer system. [0049] The treatment medium is also adapted, when it has been detected that there is no more liquid to nebulize, to stop the electrical supply of the compressor 210.

[0050] It is observed, in figure 10, an initialization step 300 during which a nozzle is connected to a reservoir of liquid to be nebulized, in such a way that the projection, through the nozzle, of nebulized liquid particles is made in the inside the reservoir.

[0051] Then, during a step 310, an air compressor is put into operation, to cause the aspiration of liquid to be nebulized in a reservoir.

[0052] For each part of the liquid aspirated during step 310, an injection step 320 then unfolds in a nebulization zone and a projection step 330 of the nebulized liquid particles, starting from the nebulization zone in that reservoir.

[0053] A part of the nebulized liquid particles then leave the reservoir through a release opening during a 340 stage.

[0054] Parallel to steps 320 to 340, part of the air in the reservoir is sucked into an open air duct, step 350, and injected into the nebulization zone, step 360.

[0055] Parallel to steps 320 to 360, there is a step of measuring 370 of the pressure in the nebulization zone and a step of

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15/16 380 treatment of that measure. Preferably, during the measurement step 370, the pressure is measured in a suction line that has a distribution nozzle in the nebulization zone and, eventually, an open air, for example, in the reservoir.

[0056] During treatment step 380, the air compressor stops operating or generates an alarm signal when the pressure measurement meets predetermined variation criteria, as explained in figure 9.

[0057] Figure 11 represents a circular piece or diaphragm 196 that has three lateral openings 197 that can be inserted in the exhaust opening 190 preferably in a flange that this opening presents in a terminal part, namely, in opposition to the nebulization chamber ( see figure 6). This circular piece has the function of retaining the thickest nebulized liquid particles, so that they form large drops, in relation to the nebulized liquid particles, which fall, under the effect of gravity, in the reservoir 100. if as soon as this forms an emulsion that is at risk of causing an oxidation of the liquid to be nebulized. [0058] In figure 12 there is a variant 26 in the shape of the distribution nozzle 25 (see figures 1 to 4). In this variant, the opening of the dispensing nozzle 25 has a non-flat shape, which consists of the intersection of the liquid supply line 70 cylinder and a cylinder surrounding the pressure air supply line 10 nozzle, having as axis the supply air supply under pressure. The inventor has observed that this particular shape 26 allows a good performance of the nebulizer nozzle 61 to 64. Any other shape, for example, a triangular shape, can be envisaged.

[0059] The device as described will be advantageously

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16/16 arranged in a compartmentalized protection box, as shown in figures 13 and 14. As you can see, this box has a locking hatch with a lock. One of the compartments of the box will be provided for receiving the device, according to the invention, and one of the other compartments will be provided for receiving the compressed air compressor. The compressed air outlet of the compressor will be connected by a flexible or rigid duct with a female tip attached to the first compartment and designed to receive the female tip of the nebulizer device cover. Another compartment will be provided to receive the electronics of the device.

[0060] Preferably, for immobilizing the device in the box, without changing the possibility of removability of the device, it is equipped with a locking lever designed to cooperate by rotation with two fixing cables fixed in the first compartment. [0061] It is evident that the present invention can receive any provisions and variants in the field of technical equivalents, without departing from the scope of the present patent.

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Claims (9)

1. Nebulizer device (200), comprising a liquid reservoir (100), a liquid supply line (120) in a nebulization zone (130) and an exhaust opening in the nebulization zone (180) through which the flow of nebulized liquid particles escapes from the nebulization zone, being that: - the exhaust opening (180) flows into the liquid reservoir (100) above the liquid level; - the liquid reservoir (100) has an opening for the release of nebulized liquid particles (195), through which a part of the nebulized liquid particles from the exhaust port leaves the reservoir; and - the device has a nebulizer nozzle (160) which comprises an air inlet duct under pressure (110), the air inlet duct (110) and the liquid supply duct (120) each having , at least one dispensing nozzle (115, 125) that empties towards the nebulization zone, and the air under pressure from the air inlet duct (110) nebulizes the liquid from the liquid supply duct (120); characterized by the fact that it also comprises a means of regulating (170) the relative position of the distribution nozzle (125) of the liquid supply duct (120) in relation to the distribution nozzle (115) of the air inlet duct under pressure ( 110). 2. Device according to claim 1, characterized by the fact that it includes an inlet for free air (140) which has a distribution nozzle in the nebulization zone (145) and an open air (141) in the liquid reservoir (100). 3. Device according to claim 1 or 2, characterized by the fact that it comprises: Petition 870170046659, of 07/04/2017, p. 23/29 2/3 - an air suction duct (140) which has a distribution nozzle (145) in the nebulization zone (130) and, in another opening of the air suction duct (142), an underpressure sensor (230); and - a means (240) for processing a signal from that sensor (230) and representative of the under pressure inside the suction duct (140). Device according to claim 4, characterized in that the suction line (140) also includes an open air opening (141) in the liquid reservoir (100). A nebulization process initiated by a device according to any one of claims 1 to 4, comprising: - a suction step (310) of liquid to be nebulized in a reservoir (100); and - an injection stage (320) of liquid to be nebulized in a nebulization zone (130), characterized by the fact that it also comprises: - a projection step (330) for the projection of nebulized liquid particles from the nebulization zone in said reservoir (100), above the level of the liquid in the reservoir; and - an exit step (340) from the reservoir (100) for part of said nebulized liquid particles. 6. Process, according to claim 5, characterized by the fact that it also includes: - an air suction step (350) for the reservoir (100); - an injection stage (360), in the nebulization zone (130), of the air drawn into the reservoir (100). Petition 870170046659, of 07/04/2017, p. 24/29 3/3 7. Process according to either claim 5 or 6, characterized by the fact that it further comprises: - a step (370) of measuring the pressure in the nebulization zone (130); and - a step (380) of processing that measurement. 8. Process according to claim 7, characterized by the fact that, during the processing step (380), the operation of an air compressor (210) is stopped or an alarm signal is generated, when the measurement pressure respond to predetermined variation criteria. 9. Process, according to claim 7 or 8, characterized by the fact that the measurement step (370) is performed by an underpressure measurement pickup (230) located in a suction duct (140) that presents an opening to the free air (141) and a dispensing nozzle (145) in the nebulization zone (130). Petition 870170046659, of 07/04/2017, p. 25/29 1/12 12/2 / 0 2Q 7 't í / t t z z / H / t t t 12/3 / / / / / / / -L 4/12 7U 5/12 / I 6/12. Ί '/ 12 _