• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Nebulizing device (1) capable of generating a mist of droplets of a liquid from a liquid (5) contained in a tank (2), said device (1) comprising: ○ a piezoelectric element (3) capable of emitting acoustic waves in said liquid (5), ○ an immersed acoustic reflection surface (4) without said liquid (5), able to focus the acoustic waves emitted by said piezoelectric element (3) on a focal zone which is below the surface (6) of the liquid (5) to create a mist jet (20) called a "primary fogging jet", o a deflector (7) of the primary fogging jet (20), ○ a fog diffusion system (9) through which said mist of droplets leaves said device (1), characterized in that: the emitting face of said piezoelectric element (3) forms with the surface of said liquid (5) an angle α between 60 ° and 95 °, preferably between 70 ° and 95 ° and even more preferably between 75 ° and 90 °, where said deflector (7) is able to orient said jet in a direction substantially opposite to the acoustic wave emission direction by the piezoelectric element and towards said diffusion system. fog (9).
    公开号:FR3029432A1
    申请号:FR1551558
    申请日:2015-02-24
    公开日:2016-06-10
    发明作者:Michel Gschwind；Frederic Richard；Abbas Sabraoui
    申请人:Areco Finances et Technologie ARFITEC SAS；
    IPC主号:
    专利说明:

    [0001] TECHNICAL FIELD OF THE INVENTION The invention relates to the technical field of spraying devices capable of producing a mist of micro-droplets from a liquid. The droplets are generated by a piezoelectric element. STATE OF THE ART Numerous devices for spraying micro-droplets of a liquid under the effect of ultrasound are known. Ultrasound is generated by a piezoelectric element. These devices use either a microperforated membrane or a piezoelectric element with or without a concentrating nozzle. The size of the droplets generated by these devices is typically between 1 to 10 μm. Many types of spray devices using a microperforated membrane are known in the literature. Such devices are described for example in the documents WO 2013/110248 (Nebu Tec), WO 2012/020262 and WO 05/15822 (Technology Partnership), EP 2 244 314 (Zobele Holding), US 2006/213503 and US 2005 / 224076 (Pari Pharma), WO 2001/85240 (Pezzopane), FR 2 929 861 (L'Oreal), US 8 870 090 (Aptar), WO 2008/058941 (Telemaq), JP 2001/300375 (Panasonic). Some of them are very simple and quite compact, but generally devices using a membrane have a very low flow rate, that is to say, they produce a very small amount of fog. Their life is quite limited (often less than 1000 hours). This may be suitable for some uses (for example to diffuse perfumes in a room), but not for others. Moreover, these devices require careful maintenance because the membrane may clog; in this context the quality of water (limestone, filtered, pH) is important. These systems are also relatively sensitive to the water pressure above the membrane and the air pressure in the diffusion volume; water leakage problems may occur. This lack of robustness of devices using a perforated membrane may limit their interest for certain types of applications, especially industrial applications and especially products intended for the general public (fridge, electric cellar), which require a long service life (of the order from 5 to 10 years) and for which complex and frequent maintenance procedures are not possible.
    [0002] Spray devices are also known using a vessel provided with a concentrating nozzle and a piezoelectric element, as described for example in EP 0 691 162 A1 and EP 0 782 885 A1 (IMRA Europe). . These devices are very reliable and are commonly used for moistening and freshening fresh products on sales stands, as described in documents FR 2 899 135 A1, FR 2 921 551 A1, WO 2014/023907 A1, WO 2013/034847 Al (ARECO), FR 2,690,510 Al (Techsonic). Their flow is important and suitable for many technical and industrial uses; in return, their electrical consumption is significant (of the order of 10 to 70 W per piezoelectric element). Since they do not have perforated membranes, these devices are not likely to be disturbed in their operation by clogging problems; they have a lifespan of 5000 hours on average. On the other hand, these devices have a certain size which is mainly related to the thickness of water necessary for the proper functioning of the piezoelectric element (generally from 20 to 35 mm) and also to the height of the diffusion chamber required. for the creation of an almost vertical and very powerful acoustic jet (generally 40 to 100 mm). There are devices whose efficiency "water flow / electric power" has been optimized. These systems are generally equipped with nozzles acting as concentrators of the acoustic waves generated by the piezoelectric element operating at very high frequency (of the order of a few MHz), a water circulation pump, a fan and a specific power supply. The integration of all these elements in a small volume remains a stumbling block for many applications that require a very powerful system (ratio flow / electric power) and a very high reliability (especially the piezoelectric element, the fan, pump, high frequency generators).
    [0003] Attempts to miniaturize these devices are hampered by the need to keep the active face of the piezoelectric element permanently covered with a sufficiently thick layer of water to prevent it from overheating. Furthermore, the ultrasound focusing by the nozzle can be effected effectively only in a liquid and over a certain path length traveled by the acoustic waves in the liquid medium. For these reasons, a minimum water thickness of the order of 20 to 35 mm is necessary in the devices according to the state of the art. In any case, even in a miniaturized system of this type, the presence of a water circulation pump and a fan is added to the electrical consumption of the piezoelectric element.
    [0004] The problem that the present invention seeks to solve is to provide a miniaturized spraying device, and in particular of very low height, having a high flow rate, a low power consumption, which is of great reliability which does not need frequent maintenance, and which presents no risk of clogging.
    [0005] Objects of the invention According to the invention the problem is solved by a nebulizing device capable of generating a mist of droplets of a liquid from a liquid contained in a tank, said device comprising: a piezoelectric element electrical device adapted to emit acoustic waves in said liquid, an immersed acoustic reflection surface without said liquid, able to focus the acoustic waves emitted by said piezoelectric element on a focal zone which is located below the surface of the liquid to create a fog jet called "primary fogging jet", a deflector of the primary fogging jet, a fog diffusion system through which said fog of droplets leaves said device, characterized in that: the emitting face of said piezo element -electric form with the surface of said liquid an angle w between 60 ° and 95 °, preferably between 70 ° and 95 ° and still more preferably between 75 ° and 90 °, said deflector being able to orient said jet in a direction substantially opposite to the direction of emission of acoustic waves by the piezoelectric element and towards said fog diffusion system. Said acoustic reflection surface advantageously has a substantially parabolic shape.
    [0006] Said deflector is advantageously capable of orienting the jet of liquid generated by the effect of said acoustic waves outside the liquid surface area which extends between the emitting surface of the piezoelectric element and said acoustic reflection surface. .
    [0007] In one embodiment, the primary spray jet has an angle α of between 5 ° and 85 ° (and preferably between 10 ° and 60 °) with respect to the surface of the liquid.
    [0008] The focal point of the acoustic waves reflected by the acoustic reflection surface is advantageously at a depth of between 0 mm and 5 mm and preferably between 1 mm and 3 mm below the surface of the liquid: this ensures bin fog yield and good stability of the operating conditions of the device. The device according to the invention may comprise a fan which generates an air flow towards said deflection surface.
    [0009] According to one embodiment, the device according to the invention comprises an auxiliary deflector disposed downstream of the primary jet; this auxiliary deflector slows the flow of fog. Advantageously, the height h of the liquid in the device does not exceed 12 mm, preferably does not exceed 10 mm, and even more preferably does not exceed 9 mm. According to one embodiment, the device according to the invention comprises means for periodically or permanently disinfecting said liquid, such as a UV light source or a heating resistor. The device according to the invention can be constructed in a very compact manner, and in particular with a low height. Advantageously, the total height of the device does not exceed 35 mm, preferably does not exceed 30 mm, and even more preferably does not exceed 25 mm. In one embodiment, the device according to the invention comprises an upper part which integrates in a single piece (for example in the form of a cap or dome) the deflector which directs the jet of liquid generated by the effect of the waves. acoustic, and which also incorporates the auxiliary deflector; these two deflectors may form a single curved inner surface of said shell or dome, which may extend from the air inlet to the fog outlet. In this embodiment the device also comprises a lower part which integrates the acoustic reflection surface, and which integrates, at the end opposite to the air inlet orifice, the piezoelectric element; this lower part contains the liquid to be sprayed.
    [0010] The device according to the invention can operate with different liquids. The liquid may especially be selected from the group consisting of: water, water containing at least one disinfecting product, water containing at least one odorant, a solution of at least one essential oil, an emulsion at least one essential oil; or a mixture of the elements that make up this group. According to one embodiment of the invention, the device is integrated in a compartment 5 with temperature and / or controlled humidity, such as a refrigerator, a cold room, a controlled atmosphere cabinet or a wine cellar. In particular, thanks to its low height, the device according to the invention can be integrated into a horizontal plate of a refrigerator, and preferably so that the mist of droplets is introduced into a crisper. Thus, another object of the invention is a refrigerator plate, comprising a device according to the invention.
    [0011] The device according to the invention, and in particular the refrigerator plate comprising this device, may comprise a hydraulic adapter capable of accommodating the mouth of a water bottle of the standard type. Another object of the invention is an apparatus comprising at least one temperature and / or controlled humidity compartment, such as a refrigerator, characterized in that it is equipped with at least one device according to the invention. FIGS. 1 to 11 show diagrammatically embodiments of the device according to the invention. Figure 1 is a block diagram of a device according to the invention shown in vertical section. Figure 2 shows three views of a device according to the invention. Figure 2c shows the device from above, Figure 2b shows a front view, and Figure 2a shows a sectional view along the plane A-A shown in Figure 2c. Figure 3 shows three further views of the device of Figures 2: a side view in perspective (Figure 3a); a view (Figure 3b) identical to that of Figure 3a but in it shows only the components contained in the housing, the latter (shown in 35 dotted lines) being shown as being transparent; and a view similar to that of Figure 3b but from another angle (Figure 3c). Figure 4 shows a perspective view of a section along the plane A-A shown in Figure 2c. The circle designates an area "A" which is enlarged in Figure 4b.
    [0012] Figure 5 shows another perspective view of a section along the plane A-A shown in Figure 2c. The circle designates an area "B" which is enlarged in Figure 5b. Figure 6 is a block diagram of another device according to the invention shown in vertical section.
    [0013] Figure 7 is a block diagram of a device according to the invention which has an auxiliary baffle (item 26). Figure 8 is a block diagram of a device according to the invention, the deflector has in its lower part a portion with inverse curvature (reference 27). FIGS. 9 to 11 show schematically a variant of the embodiment with auxiliary baffle: FIG. 9 is the cross-sectional representation of a nebulization cell according to the invention shown in FIG. 10, while FIGS. and llb show two other views of the same cell. List of marks used in the figures: 1 Device according to the invention 17 Large droplets 2 Tank 18 Fine droplets 3 Piezoelectric element 19 UV light source 4 Acoustic reflection surface 20 Nebulization spray 5 Liquid 21 Outlet tube 6 Surface (level) of the liquid 22 Nebulizer cell 7 Nebulization primary spray deflector 23 Fan 8 Fog 24 Refrigerator plate 9 Diffusion system (tube) 25 Means of attachment 10 Diffusion orifice (fogging) 26 Auxiliary deflector 11 Fog jet 27 Portion of baffle 7 with reverse curvature 12 Air inlet port 13 Airflow 28 Focal point 14 Level control tube 29 Upper part 15 Water tank 30 Bottom 16 Hydraulic adapter (anti-drop) 15 Detailed description The device 1 according to the invention is traversed by an air flow 13 which enters through an air inlet orifice 20 advantageously arranged at one end. ends of the device 1, which passes through the nebulizing cell 22 where it is charged in droplets, to be driven into the fog diffusion system 9. An embodiment of such a device 1 is shown in Figure 1 The fogging system 9 (fogger) is close to the other end of the device 1. It necessarily comprises at least one outlet port 10 through which a fog jet 11 comes into the targeted environment. At the heart of the device 1 are the tank 2 containing the liquid to be sprayed 5 and the nebulization cell 22 with the droplet generator which comprises a piezoelectric element 3 whose active surface is immersed in said liquid 5 to be sprayed. The piezoelectric element 3 is arranged so that its active surface is at least partially covered with a liquid thickness sufficient to ensure its cooling. Preferably, said piezoelectric element 3 is arranged in such a way that its active surface forms an angle w greater than 60 ° to 95 ° with respect to the surface of the liquid, preferably between 70 ° and 95 °, and even more preferably between 75 ° and 90 °. A quasi-vertical position of the active surface of the piezoelectric element 3 with respect to the surface 6 of the liquid 5 is preferred. The acoustic waves emitted by said piezoelectric element 3 are directed towards the liquid / air interface 6, preferably via at least one acoustic reflection surface 4. The distance between said surface and the emitting surface of the piezoelectric element must be short enough to avoid too much beam divergence. acoustic waves. Typically, a piezoelectric element usable in the device according to the invention has a near field (i.e. a zone from the emitting surface where the wave beam is approximately parallel) of about 10 mm to 30 mm. For example, it is possible to use a piezoelectric element with a diameter of 10 mm, which makes it possible to reduce the height h of liquid in the tank to less than 12 mm, ideally between 10 mm and 12 mm.
    [0014] In an advantageous embodiment, the acoustic reflection surface 4 has a shape that makes it possible to focus the acoustic waves. It typically has a cap or cupola shape, and preferably a parabolic shape, the concavity of said reflection surface 4 being turned towards the piezoelectric element 3. It allows the focusing of the acoustic waves on a focal zone (of preferably a focal point) which is below the surface (liquid / air interface) 6 of the liquid 5, at a depth d of the order of a few millimeters (this parameter is shown in FIG. 7). Advantageously, the focal point is at a depth d of between 0 and 5 mm. It must be avoided that it is located above the surface 6 of the liquid 5, as this leads to a significant drop in the fog yield. It is preferred that the focal point is at a depth of at least 0.5 mm, and still more preferably at least 1 mm; this gives a good performance while ensuring a good stability of the operating conditions. A depth of between 1 mm and 3 mm is globally optimal.
    [0015] The focal length F between the focal point and the emitting surface of the piezoelectric element 3 is advantageously between 8 to 28 mm. The distance E between the emitting surface and the piezoelectric element 3 and the acoustic reflection surface, measured at the level of the surface of the liquid, is advantageously between 10 mm and 30 mm (knowing that E> F); it is located in the near field of said piezoelectric element. The frequency is advantageously between 1 MHz and 5 MHz, for example 3 MHz. The reflection surface 4 must have a high impedance contrast, which makes it possible to produce a very effective acoustic mirror (i.e. a mirror reflecting almost all of the acoustic energy); it is preferably made of metal. Without wishing to be bound by this theory, the inventors believe that the focusing of the acoustic waves by a reflective surface makes it possible to shorten the path of the ultrasonic waves in the water, which avoids their unnecessary dispersion in the volume of liquid: thus the entire Acoustic energy is used to produce surface waves, allowing the release of micron-sized droplets from the surface with high efficiency. Thus is created from the liquid / air interface 5 a jet of droplets 20 here called "primary jet nebulization"; it is often accompanied at least for part of its length by a jet of water called an acoustic water jet. The direction of this primary jet of nebulization 20 is determined mainly by the focusing of the acoustic waves; the direction is here expressed by an angle α with respect to the surface of the liquid 5 in the opposite direction to the air flow, defined in FIG. 1 (the 0 ° angle corresponding to the horizontal opposite to the direction of the flow of Air FA angle 180 ° horizontally towards the airflow). It can be adapted to the operation of the device, in particular according to the presence or absence of a fan 23. The inventors have found that if the primary fogging jet 20 is directed in the reverse direction of the air flow 13, or at least in a direction which strikes the latter (preferably with an angle α less than 90 °, as shown in FIG. 1), this makes it possible to prevent the larger drops 17 from being carried into the fog 8; they fall back into the tank of the tank 2.
    [0016] The separation effect of large drops that has just been described is particularly effective when the airflow FA is generated by a fan. Indeed, in one embodiment of the invention is added to the device 1 according to the invention a fan, preferably installed near the air inlet port 12. Such an embodiment is shown on Figure 6. It is observed in this case that the acoustic jet is carried by the air flow from the fan; the parabolic shape of the acoustic reflection surface 4 and the shape of the deflector 7 determine a geometry that promotes the blowing of small droplets at the expense of large drops; this enrichment of the fog in small droplets is desirable for the desired result. The presence of a deflector surface 7 (preferably made of metal to minimize absorption energy loss) against which the primary spray jet 20 encounters after encountering the air stream 13 is very advantageous for separating the droplets. 15 large 17 of the flow of the fine droplets 18 which itself is driven with the air flow 13 to form a mist 8 which then enters the diffusion system 9. It is indeed desirable that the fog 11 delivered by the device 1 is composed of very fine droplets, in order to allow rapid evaporation of the fog once deposited on a solid surface or in a small volume. This evaporation ensures rapid cooling of the environment (ie air and the surface on which the fog is deposited) insofar as the enthalpy of evaporation comes from the environment (air and surface on which the fog is deposited). The finer the drops, the faster their evaporation and the less stagnant moisture (drops of water) will effect the surface or the volume. The surface of the deflector 7 of the primary jet nebulization serves as deflector of the jet in order to remove at least a portion of the large droplets 17 and spread the nebulization. At the same time this deflector surface 7 also guides the return of water from the acoustic water jet into a zone away from the focal point so as not to disturb the water jet and to reduce its droplet yield. The air flow 13 passing through the device 1 can also be generated by simple aspiration, the air in the air space below the deflector 7 being driven towards the diffusion system 9 by the effect of the jet. Nebulizing primer 20. Indeed, the inventors have found that the device 1 according to the invention does not need a fan, the air flow 13 generated by suction being strong enough for certain types of applications; the speed of said "natural" airflow will generally be lower than with fan.
    [0017] Without wishing to be bound by this theory, the inventors believe that this observation is explained by the fact that the initial velocity of the acoustic waves on the surface of the liquid is sufficient to generate droplets with sufficient energy to transfer part of them. to the surrounding air molecules. More precisely, some of this mechanical energy is absorbed by the air in the form of heat (friction of the molecules), but also in the form of kinetic energy of the molecules of the air themselves. This entrainment effect of the air molecules by the droplets of the liquid can explain that the air is driven by the drops whose velocity vector is oriented by the deflector 7. The entrainment of large drops being inefficient they fall back into the tank at a point distant from the focal point. For a fanless system, the direction and the power of the primary fogging jet play a vital role for the proper functioning of the system, this direction being chosen and controlled via the acoustic reflection surface 4 its shape is preferably parabolic , and the parabolic equation is chosen so as to have a primary jet 20 which makes an angle α of between 95 ° and 175 ° degrees (and preferably between 100 ° and 150 °) relative to the surface 6 of the liquid . In a variant, a small auxiliary deflector 26 (which may be for example a solid surface or a grid) is added close to the diffusion outlet to block the large parasitic drops; this is shown schematically in FIG. 7. In this figure the symbol Fij designates the direction of the primary jet of nebulization 20, the symbol FA that of the air flow 13 generated by suction. This figure shows an angle [3 which corresponds to (180 ° - a).
    [0018] The result is thus surprising that for the device according to the invention, the acoustic reflection surface 4 must be adapted to the power of the air flow 13 which passes through the device and which causes the generated fog: with a fan, it is worth better to have a primary jet that strikes the airflow, whereas without a fan (ie with a flow of air generated by the primary jet itself, by a driving or suction effect) it is preferable that the primary jet is rather in a direction that follows the flow of air; in the two cases we observe, by different mechanisms, a separation of large drops 17 which fall into the tank 2. The addition of an auxiliary deflector 26 (baffle) downstream of the baffle 7 reinforces the separation of large drops in the embodiment without fan. The deflector 7 has a dual function. Its shape and positioning must be such that it can properly orient the primary jet of nebulization 20, and such that it can ensure that the so-called "acoustic" liquid jet, which accompanies the primary jet of nebulization 20, is oriented in an area that does not disturb the focal point 28 of the acoustic waves in the liquid. Advantageously, the deflector 7 extends in the upstream direction (ie opposite to the air flow) so as to conduct the jet of acoustic liquid outside the zone which extends between the piezoelectric element 3 and the reflection surface. 4. In an embodiment illustrated in Figures 9 to 11, the device according to the invention comprises an upper portion 29 which integrates in one piece (for example in the form of a cap or dome) the deflector 7 the primary fogging jet which directs the jet of liquid generated by the effect of acoustic waves, and which also integrates the auxiliary baffle 26; these two baffles may form a single curved inner surface of said shell or cupola, which may extend from the air inlet port 12 to the outlet 21 of the fog. In this embodiment the device also comprises a lower part 30 which integrates the acoustic reflection surface 4, and which integrates, at the end opposite to the air inlet port 12, the piezoelectric element 3 ; this lower part contains the liquid 5 to be sprayed. In one embodiment, the deflector 7 has in its lower part, close to the liquid surface, a portion 27 having a curvature in opposite direction, to promote the entry of the air flow into the nebulizing cell 22. This is shown in FIG. 8. In the device 1 according to the invention, the nebulizing cell 22 is delimited by the deflector 7 and comprises the acoustic reflection surface 4.
    [0019] The device according to the invention can be installed in a compartment with humidity and / or controlled temperature, such as a refrigerator or a wine cellar. In the case where the device 1 according to the invention is installed in a ventilated cold refrigerator one can either provide an air inlet in which is passively blown the air flow generated by the central cooling fan of the refrigerator or a fan 23 may be added which generates a flow of air, preferably in the same direction as the flow of air generated by the central cooling fan of the refrigerator.
    [0020] In a particular embodiment of the invention, the tank 2 comprises a disinfection system which can in particular be: either an ultraviolet (UV) light source 19 (the light being represented by the arrows in FIG. 1) adapted to at least partially disinfect the liquid it contains; the operation of this UV light source 19 may be permanent or intermittent; or a heating resistor capable of temporarily heating the water to a temperature sufficient to disinfect it, for example by thermal shock.
    [0021] The device 1 can be supplied with water via a hydraulic adapter (anti-drop) 16; the water can come from a water tank 15 integrated in the device 1 (as shown in FIG. 1) or from an appropriate external supply (pipes fed by a remote tank for example).
    [0022] In one embodiment the water level 6 is automatically controlled via a leveled control tube 14 beveled; this increase in the open section of the tube avoids blocking any air bubbles at the entrance. This tube is equipped with a hydraulic anti-drip adapter; it is advantageous to choose an adapter model adapted to the majority of commercial water bottles. The water supply of the tank 2 can be done in various other ways (not shown in the figures). For example, water can come from a remote tank. In the case where the device 1 is implanted in a refrigerator, the water that feeds the tank 2 may come from the condensate recovery (a filter is advantageously provided for filtering said condensate before admission to the tank 2), or the water which feeds the tank 2 can be taken from the water supply of the refrigerator, if the latter has such a power supply. The system 1 according to the invention has a small total height y, which may be less than 35 mm, preferably less than 30 mm and even more preferably less than 25 mm. This low height opens up completely new application possibilities. In one embodiment of the invention the device according to the invention can be installed in the thickness of a horizontal plate 24 of a refrigerator. Such plates are generally either glass or plastic, and if they are glass they include a plastic frame; as a result they have a thickness of about 15 to 25 mm at the frame. According to the invention, the nebulizing device 1 is integrated in at least one plate of a refrigerator, and the outlet orifices 11 are directed downwards to create a controlled humidity atmosphere. In an alternative embodiment, said device 1 is integrated in the upper wall of the vegetable crisper or in a plate inside said container, and the outlet orifices 11 are directed towards the inside of said crisper. This embodiment is shown schematically in FIG. 6, in relation to the variant which comprises a fan 23, but it can obviously also be produced without a fan, as shown in FIG. 1. Said horizontal plate 24 is preferably removable to be removed from the refrigerator and has for this purpose fastening means 25.
    [0023] In an advantageous embodiment the operation of the nebulization system according to the invention can be synchronized with the opening of the refrigerator door and / or the amount of nebulization injected into the refrigerator volume can be controlled by a probe of the refrigerator. hygrometry (not shown in the figures), with a feedback loop on the nebulizing device.
    [0024] In other embodiments, a hygrometric probe is provided which measures the moisture content in the volume of conditioned air by the device 1 according to the invention; a feedback loop makes it possible to regulate the intensity and / or the intermittency of the fog jet 11 produced by the device 1 so as to obtain in said conditioned air volume a controlled humidity level, preferably constant, and preferably adjustable via an adjusting member. In another embodiment said liquid 5 comprises a disinfecting product, so that the mist jet 11 is able to disinfect at least partially said volume of air and possibly the walls which confine it. In yet another embodiment, said liquid comprises a so-called essential fragrance or oil, or other odorous product, so that the mist jet 11 is able to diffuse into said air volume a specific odor. All the embodiments presented in this description can be combined with each other. 25 30
    权利要求:
    Claims (16)
    [0001]
    REVENDICATIONS1. Nebulizing device (1) capable of generating a mist of droplets of a liquid from a liquid (5) contained in a tank (2), said device (1) comprising: a piezoelectric element (3) capable of emitting acoustic waves in said liquid (5), o an immersed acoustic reflection surface (4) without said liquid (5), able to focus the acoustic waves emitted by said piezoelectric element (3) on a focal zone which is below the surface (6) of the liquid (5) to create a mist jet (20) called "primary fogging jet", o a deflector (7) of the primary fogging jet (20), o a fog diffusion system (9) through which said mist of droplets leaves said device (1), characterized in that: o the emitting face of said piezoelectric element (3) forms with the surface of said liquid (5) an angle w between 60 ° and 95 °, preferably between 70 ° and 95 ° and more more preferably between 75 ° and 90 °, where said deflector (7) being able to orient said jet in a direction substantially opposite to the direction of emission of the acoustic waves by the piezoelectric element and towards said diffusion system. fog (9).
    [0002]
    2. Device according to claim 1, characterized in that said acoustic reflection surface (4) has a substantially parabolic shape.
    [0003]
    3. Device according to claim 1 or 2, characterized in that said baffle (7) is adapted to orient the jet of liquid generated by the effect of said acoustic waves outside the liquid surface area which extends between the emitting surface of the piezoelectric element (3) and said acoustic reflection surface (4).
    [0004]
    4. Device according to any one of claims 1 to 3, characterized in that the primary jet of nebulization (20) makes an angle of between 5 ° and 85 ° (and preferably between 10 ° and 60 °) relative to on the surface of the liquid. 35
    [0005]
    5. Device according to any one of claims 1 to 4, characterized in that the focal point of acoustic waves reflected by the acoustic reflection surface (4) is at a depth between 0 mm and 5 mm and preferably between 1 mm and 3 mm below the surface (6) of the liquid. 3029432 15
    [0006]
    6. Device according to any one of claims 1 to 5, characterized in that it comprises a fan (23) which generates an air flow (13) towards said deflection surface (7). 5
    [0007]
    7. Device according to any one of claims 1 to 5, characterized in that it comprises an auxiliary baffle (26) disposed downstream of the primary jet (20) which slows the flow of fog. 10
    [0008]
    8. Device according to any one of claims 1 to 7, characterized in that the height h of the liquid (5) does not exceed 12 mm, preferably does not exceed 10 mm, and even more preferably does not exceed 9 mm.
    [0009]
    9. Device according to any one of claims 1 to 8, characterized in that it comprises means for periodically or permanently disinfecting said liquid (5), such as a UV light source (19) or a heat resistence.
    [0010]
    10. Device according to any one of claims 1 to 9, characterized in that its total height does not exceed 35 mm, preferably does not exceed 30 mm, and even more preferably does not exceed 25 mm.
    [0011]
    11. Device according to any one of claims 1 to 10, characterized in that liquid (5) is selected from the group consisting of: water, the water containing at least one disinfectant, the water containing at least an odorant, a solution of at least one essential oil, an emulsion of at least one essential oil; or a mixture of the elements that make up this group.
    [0012]
    12. Device according to any one of claims 1 to 11, characterized in that it is integrated in a compartment temperature and / or controlled humidity, such as a refrigerator, a cold room, a controlled atmosphere cabinet or a wine cellar.
    [0013]
    13. Device according to claim 12, characterized in that it is integrated in a horizontal plate of a refrigerator, and preferably so that the mist of droplets is introduced into a crisper.
    [0014]
    14. Refrigerator plate, comprising a device according to any one of claims 1 to 13. 3029432 16
    [0015]
    15. Refrigerator plate according to claim 14, characterized in that said device comprises a hydraulic adapter capable of receiving the mouth of a water bottle of the current type.
    [0016]
    16. Apparatus comprising at least one temperature and / or controlled humidity compartment, such as a refrigerator, characterized in that it is equipped with at least one device according to any one of claims 1 to 13.
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    同族专利:
    公开号 | 公开日
    EP3227622B1|2018-08-29|
    FR3029431A1|2016-06-10|
    FR3029432B1|2016-12-23|
    WO2016087752A1|2016-06-09|
    EP3227622A1|2017-10-11|
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    FR2929861B1|2008-04-11|2011-11-11|Oreal|CARTRIDGE FOR PIEZOELECTRIC SPRAY DEVICE AND ASSOCIATED SPRAY APPARATUS.|
    IT1393824B1|2009-04-20|2012-05-11|Zobele Holding Spa|LIQUID ATOMIZER WITH PIEZOELECTRIC VIBRATION DEVICE WITH IMPROVED ELECTRONIC CONTROL CIRCUIT AND RELATED DRIVING METHOD.|
    GB201013463D0|2010-08-11|2010-09-22|The Technology Partnership Plc|Electronic spray drive improvements|
    FR2979527B1|2011-09-05|2014-06-13|Areco Finances Et Technologie Arfitec|INSTALLATION COMPRISING DROPLET FOG PRODUCTS AND DIFFUSERS|
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    FR3070880B1|2017-09-11|2020-07-17|Areco Finances Et Technologie - Arfitec|DEVICE FOR GENERATING DROPLETS FROM A LIQUID COMPRISING IMPROVED VENTILATION MEANS AND ITS IMPLEMENTING METHOD|
    CN112916288A|2021-01-19|2021-06-08|华中科技大学|Piezoelectric type monodisperse continuous droplet generator|
    法律状态:
    2016-02-25| PLFP| Fee payment|Year of fee payment: 2 |
    2016-06-10| PLSC| Publication of the preliminary search report|Effective date: 20160610 |
    2017-02-27| PLFP| Fee payment|Year of fee payment: 3 |
    2018-02-26| PLFP| Fee payment|Year of fee payment: 4 |
    2020-02-14| PLFP| Fee payment|Year of fee payment: 6 |
    2021-02-18| PLFP| Fee payment|Year of fee payment: 7 |
    2022-02-22| PLFP| Fee payment|Year of fee payment: 8 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1402792A|FR3029431A1|2014-12-05|2014-12-05|COMPACT SPRAY DEVICE|PCT/FR2015/053236| WO2016087752A1|2014-12-05|2015-11-26|Compact spray device|
    EP15808754.4A| EP3227622B1|2014-12-05|2015-11-26|Compact spraying device|
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