EP1940558A1 - Procede pour alimenter en liquide un dispositif de nebulisation et cartouche pour un tel dispositif de nebulisation - Google Patents
Procede pour alimenter en liquide un dispositif de nebulisation et cartouche pour un tel dispositif de nebulisationInfo
- Publication number
- EP1940558A1 EP1940558A1 EP06820147A EP06820147A EP1940558A1 EP 1940558 A1 EP1940558 A1 EP 1940558A1 EP 06820147 A EP06820147 A EP 06820147A EP 06820147 A EP06820147 A EP 06820147A EP 1940558 A1 EP1940558 A1 EP 1940558A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cartridge
- liquid
- zone
- thinned
- housing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B17/00—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups
- B05B17/04—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods
- B05B17/06—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations
- B05B17/0607—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers
Definitions
- the present invention relates to devices for nebulizing liquid and in particular the supply of such devices in liquid to be sprayed.
- a liquid nebulizing device is described in the international application WO 99/46126 (US 6,460,980). Although initially intended for the production of an inkjet print head, such a device is the subject of various other applications, including applications to the nebulization of liquids in the air, for the purpose of humidification or cooling of the air, or for diffusing sanitizers, deodorants, disinfectants, perfumes, ... as described for example in the application EP 0714709 or the application WO 00/78467.
- FIG. 1 is the block diagram of a conventional fogging device of the aforementioned type.
- the device comprises a nebulizing head 30, a main reservoir 1 containing a liquid 36 to be nebulized, an intermediate reservoir 33 also containing liquid 36, a pipe 31 connecting the reservoir 33 to the nebulizing head 30 and a pipe 34 equipped with an electric pump 35, connecting the tank 1 to the tank 33.
- the tanks 1 and 33 are subjected to the atmospheric pressure Patm.
- the nebulizing head 30, substantially horizontal, comprises a capillary tube 30-1 and a nozzle 30-2 for ejecting the liquid.
- the fogging head is generally in the form of a hollow needle having an inside diameter of less than a millimeter and a length of a few centimeters, the body of which forms the capillary tube 30-1 and whose chamfered distal end forms the ejection nozzle 30-2.
- the nebulizing head 30 is mechanically coupled to a vibrating means, typically a resonator TPE piezoelectric transducer.
- the TPE transducer is excited by an alternating signal Sv supplied by an EXCT circuit.
- the EXCT circuit is controlled by a CNTCT control circuit which defines the duration of nebulization cycles.
- the CNTCT circuit also controls the pump 35 and adjusts the level of liquid in the intermediate tank 33, which it monitors by means of a level detector 33a.
- the nebulization head When the excitation signal Sv is applied to the TPE transducer, the nebulization head resonates and liquid droplets 32 are ejected, forming a kind of mist of droplets or "nebulizing jet".
- the nebulizing head 30 is supplied with liquid by capillarity and by gravity, the pressure at the inlet of the capillary tube 30-1 being a function of the height and the column of liquid between the intermediate reservoir 33 and the tube capillary 30-1.
- a general objective of the present invention is to provide a method for supplying liquid such a nebulization device, easily for the user and a commercially valid way for the manufacturer.
- an idea of the invention is to supply the device with liquid by using as a main reservoir 1 a disposable removable cartridge.
- the cartridge must include an interface, such as a sealing means that can be pierced in order to seal the interior of the cartridge with the pipe leading to the nebulizing head,
- the cartridge must be of a simple and easy installation in the nebulizing device, without risk of accidental leakage of liquid at the time of its installation, and
- the liquid inside the cartridge must be kept close to the atmospheric pressure, so that the cartridge can be emptied gradually without appearing a depression that would limit the flow of liquid to the entry of the nebulizing head or even that would prevent the liquid from flowing in the pipe.
- the present invention aims to meet requirements that appear contradictory.
- making the cartridge with a minimum of material implies that the cartridge will be flexible and therefore difficult to handle, while the drilling of a rubber sealing means requires to exert a significant pressure on the cartridge and .necessite thus good rigidity of the cartridge.
- the present invention aims at a low cost cartridge that can be easily handled and installed in a nebulizer device, without risk of inadvertent flow of liquid to be sprayed outside the liquid circuit of the nebulizer device.
- Another object of the invention is to provide a fluid supply system of the fogging head that is simple and inexpensive, and allows the realization of a nebulization device used anywhere and in difficult conditions, including in the presence of shocks and vibrations.
- the present invention provides a method for supplying liquid to a liquid nebulizer device, comprising the steps of providing a cartridge comprising flexible and deformable walls, at least a first reinforcing zone and a flow orifice of liquid, to arrange the liquid to be atomized in the cartridge and to close the orifice with a membrane, to equip the nebulizing device with a housing comprising a housing for receiving the cartridge and a means for piercing the membrane arranged under the housing, and engage the cartridge in the housing by arranging the membrane above the piercing means, and then press the first reinforcing zone to pierce the membrane.
- the method comprises the steps of providing on the cartridge a thinned zone intended to be pierced to put the liquid inside the cartridge at atmospheric pressure, filling the cartridge only partially with nebulizing liquid so that the thinned area extends above the surface of the liquid when the cartridge is arranged in the nebulizing device, and pierce the thinned area when the cartridge is introduced into the housing.
- the thinned zone is formed on a rear face of the cartridge in a region adjacent to an upper face of the cartridge, the cartridge being filled with liquid to be sprayed to a level immediately below the thinned zone.
- the method comprises a step of providing in an upper part of the housing a means for drilling the thinned portion of the cartridge secured to the housing.
- the method comprises the steps of providing on the cartridge at least a second reinforcing zone, and pressing on the second reinforcing zone to pierce the thinned portion with the piercing means, after engaging the cartridge in housing and piercing the membrane.
- the second reinforcing zone is shaped so as to surround the cartridge on either side of the thinned zone.
- the method comprises the steps of providing on the cartridge a sleeve extending from a lower face of the cartridge, and having a distal end forming the liquid flow orifice, conforming the cartridge so that it has a height substantially equal to the height of the housing without taking into account the sleeve, conforming the cartridge so that it has a side face having a recess for partially engaging the cartridge in the housing while placing the sleeve above the piercing means of the membrane, and, after piercing the membrane, lowering the cartridge and rotating the cartridge around the piercing means, so that the remainder of the cartridge enters the housing.
- the first reinforcing zone is shaped so as to surround the cartridge passing in the vicinity of the flow orifice.
- the cartridge is shaped to have a height less than its width.
- the liquid nebulizer device comprises a vibrating nebulization head comprising a capillary tube and a liquid ejection nozzle, fed by the liquid present in the cartridge, the method comprising a step of providing in the nebulizing device, a pipeline without pumping means and without intermediate reservoir for connecting the cartridge to the nebulizing head, the nebulizing head being supplied with liquid under the effect of a hydrostatic pressure due to a difference in height between the level of liquid in the cartridge and the nebulizing head.
- the housing receiving the cartridge is arranged above the nebulizing head, at a height sufficient to exert on the liquid at the inlet of the capillary tube, during nebulization cycles, a hydrostatic pressure greater than a first pressure threshold beyond which the liquid flows through the nebulizing head when it is stopped, but below a second pressure threshold beyond which the liquid would flow through the nebulizing head when it is driven in vibration.
- the invention also relates to a cartridge for liquid nebulizing device, containing or intended to contain a liquid to be sprayed and having a liquid flow orifice.
- the cartridge comprises an envelope comprising flexible and deformable walls and at least a first reinforcing zone serving as a support zone on the envelope for piercing a closing membrane the flow orifice when installing the cartridge in a nebulizer device.
- the cartridge contains liquid and the membrane closes the flow orifice.
- the cartridge is partially filled with liquid and comprises a thinned area intended to be pierced to bring the liquid to atmospheric pressure, the thinned zone being arranged above the surface of the liquid when the cartridge is installed in a position of use in a nebulizing device.
- the thinned zone is formed on a rear face of the envelope in a region adjacent to an upper face of the envelope, the cartridge being filled with liquid to be sprayed to a level immediately below the envelope. thinned area when in the use position.
- the cartridge comprises at least a second reinforcing zone serving as a support zone on the cartridge for piercing the thinned zone during the installation of the cartridge in a nebulization device.
- the second reinforcing zone surrounds the envelope on both sides of the thinned zone.
- the thinned zone has a thickness of between 0.1 and 0.5 mm, and the thickness of the second reinforcing zone in which the thinned zone is formed is between 0.8 and 1.5. mm.
- the liquid flow orifice comprises a sleeve extending from a lower face of the envelope, the envelope comprising a lateral face having a recess for engaging the cartridge in a nebulizing device while placing the sleeve above a piercing means of the membrane.
- the first reinforcing zone surrounds the envelope through the flow orifice or in the vicinity thereof.
- the casing has a thickness of between 0.3 and 0.8 mm, and the thickness of the first reinforcing zone is between 0.8 and 1.5 mm.
- the envelope is made of high density polyethylene.
- FIG. 2 shows in perspective a cartridge according to the invention
- FIG. 3 is a perspective view showing a nebulization device according to the invention and illustrating the installation of the cartridge in the device;
- FIG. 4 is a partial sectional side view of the cartridge and the nebulizing device
- - Figure 5 is a top view in partial section of the nebulizing device and several successive positions of the cartridge, during the installation thereof; and - Figure 6 is a perspective view of the nebulizing device once the cartridge installed in the device.
- Figure 2 shows a cartridge according to the invention comprising a casing 1 having an elongated substantially parallelepiped shape with rounded edges.
- the cartridge has an upper face 1a, a lower face Ib, a right lateral face Ic, a left side face (not referenced), a rear face Id (appearing here as a front face because the cartridge is seen from the back) and a face before.
- the cartridge also comprises a sleeve 2 extending perpendicularly to the lower face Ib of the casing.
- the cartridge has a height, a width and a depth.
- the height of the cartridge is here defined as the distance between the upper face 1a and the lower face Ib, the width of the cartridge as the distance between the right side face 1c and the left side face, and the depth of the cartridge as the distance between the front and rear faces, Id.
- the right lateral face Ic is here lower than the left lateral face and the cartridge has a horizontal recess 3 substantially parallel to the faces la, Ib, followed by an offset lateral face 3a, substantially parallel to the lateral face Ic, joining the face upper la (the recess 3 and the shifted face 3a forming a kind of "step").
- the sleeve 2 is disposed substantially in line with the offset face 3a and its distal end forms an opening used for filling the cartridge. Once the cartridge is filled, the distal end of the sleeve is closed by a septum 7.
- the septum 7 is for example a rubber membrane attached to the distal end of the sleeve by a metal ring.
- the casing 1 of the cartridge has a fairly low height, to limit the variations of the hydrostatic pressure in a liquid distribution circuit according to the level of filling of the cartridge.
- the width of the cartridge is greater than its height for the cartridge to have a satisfactory internal volume.
- the cartridge has for example a height of the order of 5.3 cm, a width of the order of 15.5 cm and a depth of the order of 7.3 cm.
- the casing 1 of the cartridge is made of a material resistant to the aggressiveness of liquids such as perfumes and essential oils, and preferably recyclable, for example a polymer such as high density polyethylene.
- the casing 1 has a small thickness of between 0.3 and 0.8 mm, preferably of the order of 0.4 mm, so as to be carried out with a minimum amount of material and at a lower cost. It therefore has a certain flexibility.
- the envelope 1 also has, according to the invention, reinforcement zones 5a, 5b of greater thickness (delimited by lines in broken lines) which will be described later in more detail.
- FIGs 3 to 5 illustrate the introduction of the cartridge 1 in a nebulizing device according to the invention.
- the device is equipped with a housing 10 comprising a base 11 closed by a cover 12, the base being intended to be attached to a vertical surface (wall).
- the base 11 comprises a housing 15 provided for receiving the cartridge 1 and a box 13 receiving the liquid pipe (31, 34, Fig. 1) as well as the electrical circuits for controlling and controlling the nebulizing device (EXCT circuits, CNTCT , fig. 1).
- the nebulizing head not shown for the sake of simplicity, has its distal end which opens for example on the front of the cabinet 13, through an opening made for this purpose, a corresponding opening being provided on the front face of the lid 12 .
- the housing 15 is above the box 13 and the latter comprises an upper opening 14 provided for receiving the sleeve 2.
- FIG. 4 it appears that the opening 14 made in the box 13 gives access to the inlet 18 of the liquid circuit of the nebulization device (corresponding in the schematic diagram of FIG. 1 to the part of the pipe 34 opening into the tank 1).
- the inlet 18 of the pipe is arranged to receive the sleeve 2 and has a hollow needle 19 provided for piercing the septum 7 closing the distal end of the sleeve 2, and thus sealingly communicating the inside of the cartridge with the pipe or liquid circuit of the nebulizing device.
- the cartridge is first engaged perpendicularly in the housing 15 of the housing 10, the right side face Ic of the casing 1 being presented first.
- the height d between the upper face of the casing 1 and the horizontal recess 3 is substantially equal to the length of the sleeve 2.
- the cartridge can therefore engage in the housing 15 until the septum 7 is opposite the needle 19.
- the cartridge 1 is moved downwards (in the direction indicated by the arrow 16 in FIG. 3).
- reinforcement zone 5a mentioned above belt the envelope 1 and thus extends along the upper face la, the rear face Id, the lower face Ib and the front face the passing in the vicinity of the zone of joining the sleeve 2 with the envelope or extending to this junction zone.
- the portion of the reinforcing zone 5a located on the upper face serves as a support zone for piercing the septum 7, while preventing significant deformation of the envelope.
- the septum 7 is pierced and the inside of the cartridge is in communication with the nebulizing device 10.
- the cartridge 1 is rotated. (in the direction indicated by the arrow 16b shown in Figure 3) around the needle 19, which serves as a pivot, until the rear face Id of the casing 1 abuts against the bottom of the base 11 of the case.
- Figure 5 shows in top view the initial positions 1-1, intermediate 1-2 and final 1-3 of the cartridge during the pivoting movement of the cartridge.
- the lateral face Ic of the envelope 1 must be sufficiently narrow and have sufficiently rounded lateral edges so as not to abut against the bottom of the base 11 during the pivoting movement of the cartridge 1, as illustrated by the intermediate position 1-2 .
- the cartridge In the final position 1-3, the cartridge is fully engaged in its housing 15 in the housing 10, as shown in FIG.
- a tip 17 comes into contact with a thinned zone 4 of the cartridge, then pierces this thinned zone, thus forming an orifice 4 in the envelope making it possible to put the liquid at atmospheric pressure (the orifice here in place of the thinned zone 4, it is designated by the same reference as the thinned zone).
- the tip 17 is disposed in the housing 15, perpendicularly to the base 11 of the housing, and is integral with the base 11.
- the thinned zone 4 has a thickness even smaller than the parts of the envelope extending between the reinforcement zones 5a, 5b.
- the reinforcing zone 5b mentioned above extends parallel to the reinforcing zone 5a and comprises two belts surrounding the cartridge 1 on either side of the thinned zone 4.
- the part of the reinforcing zone 5b extending on the front face, opposite the thinned zone 4, thus serves as a support zone for piercing the envelope in the thinned zone 4, while preventing a significant deformation of the envelope.
- the reinforcing zones 5a, 5b have, for example, a thickness of between 0.8 and 1.5 mm, preferably of the order of 1 mm, while the thinned zone 4 has a thickness of between 0.1 and 0, 5 mm, preferably of the order of 0.2 mm.
- the zone 4 is provided in a boss 6 formed on the upper face 1a of the cartridge in a ridge region between the upper face 1a and the rear face Id.
- the cartridge is thus pierced as close to its upper face as the .
- the cartridge can be almost completely filled to a level just below the thinned zone 4, and the subsequent piercing of the thinned zone, to form the orifice 4, can be carried out without risk of liquid flow.
- the flexibility of the cartridge is increased by the fact that it is not completely filled. Without the reinforcement zones 5a, 5b, it would be difficult or impossible to press the cartridge to obtain the piercing of the septum 7 and the orifice 4. Furthermore, it can be seen in Figure 6 that the volume of the housing 15 is almost completely occupied by the cartridge 1. This result is achieved by the particular shape of the cartridge and the position of the sleeve 2 on the lower face Ib. This arrangement makes it possible to obtain a particularly compact nebulization device having a relatively large autonomy.
- the cartridge 1 can be manufactured by extrusion and blowing of fluidized material into a mold. In this way, the thickness of the cartridge can be precisely controlled to form including the reinforcing zones 5a, 5b and the thinned zone 4.
- the sleeve can be manufactured separately and placed in the mold before the manufacture of the cartridge.
- the low height of the cartridge has the advantage of a small variation in the height of the liquid column (between the liquid level in the cartridge and the nebulization head) as the cartridge empties, and therefore a small variation in hydrostatic pressure.
- the intermediate reservoir 33 shown in the block diagram of FIG. 1 is purely and simply deleted.
- the pipes 31 and 34 shown in Figure 1 form a single pipe and the filling pump 35 is replaced by a valve opening and closing the pipe.
- the position of the cartridge (position of the housing 15, Figure 3) relative to the nebulizing head, and more particularly the height of the cartridge relative to the head of the nebulization is chosen so that 1 appears at the entrance of the tube capillary, during nebulization cycles (open valve), a determined hydrostatic pressure.
- this determined pressure is greater than a first pressure threshold beyond which the liquid flows through the nebulization head when it is stopped, but below a second pressure threshold beyond which the liquid flows through the nebulizing head when it is driven in vibration.
- Such a pressure corresponding to an overpressure with respect to the atmospheric pressure exerted at the outlet of the nebulizing head, makes it possible to substantially increase the flow rate of nebulized liquid under vibratory conditions.
- the valve which replaces the pump 35 shown in FIG. 1, must then be closed again between the nebulization cycles in order to avoid the flows.
- Another advantage offered by the provision of such an overpressure is to reduce the sensitivity of the nebulizing device vis-à-vis the variations in liquid level in the cartridge (including in case of impact or movement, for example when the device is arranged in a train or a coach). It is therefore no longer necessary to monitor the liquid level by means of a level sensor, the only constraint to be respected is that the first hydrostatic pressure threshold is not exceeded when the liquid level is maximum in the cartridge.
- the cartridge and the nebulizer device according to the present invention are susceptible of various other embodiments.
- the thinned zone 4 making it possible to practice the orifice 4 can be arranged on the upper face 1a of the cartridge, and be pierced by means of an external tool through an eye provided in the upper part of the lid 12. orifice 4 can also be pre-drilled and plugged by a cap to be removed at the time of installation of the cartridge.
- the provision of an atmospheric pressure port is an optional feature of the invention.
- the envelope of the cartridge may for example be subjected to an elastic crushing force to maintain a substantially constant internal pressure as the cartridge empties.
- this solution is less satisfactory because it is difficult to make a cartridge that crashes completely while having reinforcement zones. It therefore inevitably remains in the cartridge at the end of use a little liquid that can not be nebulized unless an expensive pumping system.
Landscapes
- Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
- Nozzles (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0510733A FR2892390B1 (fr) | 2005-10-20 | 2005-10-20 | Procede pour alimenter en liquide un dispositif de nebulisation et cartouche pour un tel dispositif de nebulisation |
PCT/FR2006/002232 WO2007045738A1 (fr) | 2005-10-20 | 2006-10-04 | Procede pour alimenter en liquide un dispositif de nebulisation et cartouche pour un tel dispositif de nebulisation |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1940558A1 true EP1940558A1 (fr) | 2008-07-09 |
EP1940558B1 EP1940558B1 (fr) | 2008-12-24 |
Family
ID=36637619
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06820147A Not-in-force EP1940558B1 (fr) | 2005-10-20 | 2006-10-04 | Procede pour alimenter en liquide un dispositif de nebulisation et cartouche pour un tel dispositif de nebulisation |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1940558B1 (fr) |
AT (1) | ATE418395T1 (fr) |
DE (1) | DE602006004474D1 (fr) |
FR (1) | FR2892390B1 (fr) |
WO (1) | WO2007045738A1 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2925860B1 (fr) * | 2007-12-26 | 2010-01-08 | Osmooze | Dispositif de commande d'une tete de nebulisation d'un appareil de liquides dans l'air |
EP2775051B1 (fr) * | 2013-03-05 | 2019-01-16 | Unilever N.V. | Dispositif pulvérisateur avec une chambre de dosage |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2715133B1 (fr) * | 1994-01-18 | 1996-03-08 | Oreal | Récipient à paroi souple déformable, du type flacon, poche ou tube, et procédé de fabrication d'un tel récipient. |
US5503302A (en) * | 1995-01-25 | 1996-04-02 | Primary Delivery Systems, Inc. | Sealed container puncturer and spray dispensing device |
US5895383A (en) * | 1996-11-08 | 1999-04-20 | Bracco Diagnostics Inc. | Medicament container closure with recessed integral spike access means |
JP3188214B2 (ja) * | 1997-05-15 | 2001-07-16 | 東罐興業株式会社 | 合成樹脂製容器 |
DE29920874U1 (de) * | 1999-11-26 | 2000-02-24 | Barnickel Thomas C | Abgabevorrichtung für einen im besonderen flexiblen Behälter sowie ein daraus gebildetes Set zum Abgeben von flüssigem oder pastösem Medium |
-
2005
- 2005-10-20 FR FR0510733A patent/FR2892390B1/fr not_active Expired - Fee Related
-
2006
- 2006-10-04 WO PCT/FR2006/002232 patent/WO2007045738A1/fr active Application Filing
- 2006-10-04 EP EP06820147A patent/EP1940558B1/fr not_active Not-in-force
- 2006-10-04 AT AT06820147T patent/ATE418395T1/de not_active IP Right Cessation
- 2006-10-04 DE DE602006004474T patent/DE602006004474D1/de active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2007045738A1 * |
Also Published As
Publication number | Publication date |
---|---|
FR2892390A1 (fr) | 2007-04-27 |
WO2007045738A1 (fr) | 2007-04-26 |
DE602006004474D1 (de) | 2009-02-05 |
EP1940558B1 (fr) | 2008-12-24 |
ATE418395T1 (de) | 2009-01-15 |
FR2892390B1 (fr) | 2008-01-25 |
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