WO1994020390A1 - Dispositif pour delivrer de tres faibles debits de fluide contenu dans un reservoir - Google Patents
Dispositif pour delivrer de tres faibles debits de fluide contenu dans un reservoir Download PDFInfo
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- WO1994020390A1 WO1994020390A1 PCT/FR1994/000236 FR9400236W WO9420390A1 WO 1994020390 A1 WO1994020390 A1 WO 1994020390A1 FR 9400236 W FR9400236 W FR 9400236W WO 9420390 A1 WO9420390 A1 WO 9420390A1
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- fluid
- outlet
- channel
- chamber
- tank
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D83/00—Containers or packages with special means for dispensing contents
- B65D83/14—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
- B65D83/44—Valves specially adapted therefor; Regulating devices
Definitions
- the present invention relates to a device for delivering very low flow rates of fluid contained in a reservoir.
- the storage tanks for liquid or gaseous, deodorant, antiseptic or other products used most often in a household or industrial environment make it possible to deliver these products in the form of aerosols from voluntary actions of the user for a limited period in time.
- the action generally consists in pressing on a mechanism allowing the opening of a spring-loaded valve.
- An object of the present invention is to provide a device which makes it possible to deliver very low flow rates of liquid typically less than 20 cm 3 per hour, while ensuring a stable and constant flow rate with static means.
- this device is of reduced cost in order to be able to be used to deliver products of low value such as air fresheners or room fragrances.
- the device for delivering very low flow rates of a liquid comprises: a reservoir capable of receiving said fluid; an outlet of said fluid flow, and capillary pressure drop means for controlling said fluid flow, said pressure drop means comprising a first and a second mechanical part in mutual contact and fixed one by relative to the other, said mechanical parts defining at their interface a channel of small section and of great length, said section of the channel being less than 1 mm ⁇ .
- the section of said channel is less than 0.2 mm. It is understood that thus, thanks to entirely static means, it is possible to deliver very low flow rates of a liquid or of a gas contained in a reservoir thanks to the presence of the capillary pressure drop means.
- the device is characterized in that said pressure drop means are arranged at the outlet of said tank and in that said channel is connected on the one hand to said outlet and on the other hand to said reservoir through which said fluid can flow in said channel.
- the fluid is pressurized in the tank.
- the device is characterized in that said channel is connected on the one hand outside of said tank and on the other hand inside said tank, whereby the fluid external to said tank can flow in said channel towards said tank, and causes the exit of the fluid to be delivered out of the tank.
- the external fluid can be ambient air.
- the channel is directly connected to an air intake secured to the tank.
- This fluid can also be pressurized.
- the capillary pressure drop device is then connected by its channel to an external reservoir of pressurized fluid.
- an intermittent fluid delivery device can be interposed between the outlet end of the channel and the outlet of the fluid delivery device.
- the capillary pressure drop means have n separate channels, each preferably corresponding to different flow rates, and the device also comprises control means. for selectively connecting a first end of at least one of said channels to a first fixed pipe and fixed means for connecting the second ends of all the channels to a second fixed pipe.
- FIG. 1 is a vertical sectional view of a first embodiment of the liquid delivery device with a pressurized tank;
- FIG. 2 is a detail view of Figure 1 showing the embodiment of the pressure drop device
- - Figure 3 is a partial view of a liquid delivery device according to a first embodiment
- - Figure 4 is a partial vertical sectional view of another embodiment of the liquid delivery device comprising another embodiment of the pressure drop device;
- FIGS. 5a and 5b are views from above and in vertical section of a second embodiment of the pressure drop device;
- - Figure 6 is a partial view of a liquid delivery device according to another alternative embodiment comprising a manual switch;
- FIG. 7 is a vertical sectional view of another embodiment of the device with another mode of pressurization of the reservoir;
- FIG. 7a shows a variant of pressurization of the tank
- FIG. 7b shows an embodiment of the device under pressurization of the liquid
- FIG. 8 is another embodiment of the liquid delivery device with flow control on the air intake
- Figure 9 is a variant of the embodiment of Figure 8.
- FIG. 10 shows a second alternative embodiment of the device of Figure 8.
- FIG. 15 is a partial view of the liquid delivery device showing a first embodiment of the intermittent delivery means
- FIGS. 18a and 18b are views from above and in vertical section of an embodiment of the capillary pressure drop device
- FIG. 21 shows an example of mounting on a tank of the device of Figure 17;
- - Figure 22 shows in vertical section an embodiment of the liquid delivery device with pressurized air inlet control;
- FIG. 23 is a vertical sectional view of an alternative embodiment of Figure 22;
- - Figure 24 is a second alternative embodiment of Figure 23;
- - Figure 25 shows in vertical section another embodiment of the liquid delivery device with control of the air intake
- - Figure 26 shows an example of use of the liquid delivery device with air inlet control mounted for example on a toilet bowl;
- - Figures 27 and 28 show in vertical section two alternative embodiments of the pressure drop device;
- - Figure 29 is a vertical sectional view of a multi-channel pressure drop device with flow adjustment and temperature compensation;
- - Figure 30 is a block diagram showing the operation of the device of Figure 29; - Figure 31 shows a top view of a multi-channel pressure drop device; - Figure 32 shows a top view of part of the temperature compensation means; and
- FIG. 33a and 33b show a shutter control device respectively in the open and closed positions. Referring first to Figures 1 to 7, we will describe different embodiments of the liquid delivery device using direct control.
- Figure 1 there is shown the upper part of a pressurized tank commercially provided with a flow control system by a laminar pressure drop created in the passage formed between a cylinder and a spring, known method.
- the part 1 is fixed on the support 2 of the spring valve 3 of the pressurized tank 4 by means of the screw 5.
- a part 6 provided in its center with an orifice 7 and a seal 8 allowing the sealing of this part 6 with the upper part of the valve guide when said part 6 is screwed.
- This screwing action allows, firstly, the opening of the valve 3 by pushing on the outlet pipe 9 linked to said valve.
- the part 11 is surrounded in its central cylindrical part by a spring 13 with contiguous turns, so that a passage 14 is created between the turns and the cylinder.
- Figure 2 shows an enlarged view of this helical passage.
- This helical passage can be very small and thus constitute a very long channel.
- the liquid passes from the chamber 10 through the passage 15, then through the spring before being discharged to the outside through the passage 16.
- a hydrophilic medium 18, for example wadding which permeates the liquid to be diffused before allowing it to evaporate in the atmosphere.
- This assembly constitutes an autonomous device making it possible to very slowly diffuse a liquid from the pressurized tank.
- One of the essential elements of the system is the pressure drop device.
- FIG. 3 gives an exemplary embodiment in which the return valve is mixed and is formed from a laminar pressure drop, as in the previous case and from an aerosol generator integrated into this pressure drop.
- a spring valve 19 controlled by the push button 20 is integrated in the spring support cylinder, which can include an element for rotating the liquid flow 21 favorable to the creation of droplets 22.
- the movement of the movement of the control button takes place through the piping 23 which transports the liquid at the outlet of the valve 19.
- the operation of the assembly is then as follows:
- the diffuser is put into service by screwing the part 6 into the part 1.
- the valve is then opened.
- the liquid then diffuses towards the reservoir 17 containing a medium. hydrophilic diffuser 18 through the openings 7 and 15, then the helical clearance between spring and cylinder 14, the outlet orifice 16 and the clearance existing between the piping 23 and its guide tube 24.
- the valve 19 opens and the liquid is guided through the tube 23 to the outlet valve 20, which allows a high flow. This operation is generally intermittent.
- the button 20 is released, the flow is stopped and only the diffusion function remains active.
- FIG. 4 gives another embodiment making it possible to achieve the same diffusion function through a laminar pressure drop.
- the essential difference compared to figure 1 lies in the embodiment of the laminar pressure drop. Instead of using a cooperating spring and cylinder to create the narrow channel, a very long groove is made in a pellet
- Figure 6 shows the integration of a pressure drop pad and a controlled valve.
- the valve 19 the pipe 23 and the valve knob 20.
- the practical operation is the same as that described with reference to said Figure 3.
- Other embodiments are possible in harming the generality of the process. Among these, one can consider other methods of pressurizing the liquid, for example by elastic membranes or by means of flexible pressurized chambers.
- FIG. 7 gives an exemplary embodiment with an integrated flow limiter.
- the reservoir consists of two elements 31 and 32 sliding relative to each other and provided with a seal 38. After the liquid 26 has been poured into part 32 of the reservoir, it is put in place the sliding element 31 which seals. By inserting said element 31, the air 27 and, consequently, the entire tank are pressurized. The depressed position of 31 is ensured by the conjunction of an elastic cleat 33 and a shoulder 35. In our example, the cleat 33 makes it possible to avoid inadvertent opening by blocking the element 31 by a second shoulder 34.
- this tank is then similar to those described above.
- the fluid passes through the piping 36 ballasted with a mass 37 in order to allow operation in all positions, then in the flow limiter 30 to enter the receptacle 17, which contains the diffusing medium 18.
- the assembly of slow diffusers and assemblies comprising a diffuser and a controlled valve can be carried out on all types of pressurized tanks by factory filling, by manual action, by the use of gas cartridges or by any other mechanical or chemical means. known to those skilled in the art.
- the diffusion or spraying device shown in FIG. 7a comprises an external container 510 made of a material capable of withstanding mechanically the pressures brought into play in such a device.
- this container is cylindrical in shape and is produced using a biodegradable or easily recycled material.
- this external container is produced using cardboard or similar material.
- Inside this container there is a first deformable sealed enclosure 512 which is initially filled with a pressurized gas constituting the propellant gas.
- the propellant gas is non-condensable, which limits the risk of accidents by suppression due to a rise in temperature.
- a second sealed deformable enclosure 514 which contains the fluid. we want to carry out diffusion or spraying.
- This enclosure 514 comprises an outlet pipe 516 which is connected to a diffusion head 518 which is of the laminar pressure drop type described above.
- the recharging device 520 makes it possible to fill the enclosure 512 with compressed gas as it expands, resulting from the progressive reduction in the quantity of fluid contained in the deformable enclosure 514. It is understood that, the propellant being enclosed inside the enclosure
- gas-tight enclosures 512 and 512 do not need to be elastic, it suffices that they are deformable in particular in the case of the enclosure 512 to accept an increasingly large amount of gas compressed.
- FIG. 7b illustrates an embodiment in which the control of the flow rate is obtained using a laminar pressure drop device, the liquid or fluid to be delivered being "pressurized" only by gravity.
- This device comprises a reservoir 524 held at a certain level by a support 526.
- the flow limiter 528 mounted in a self-contained housing is connected to the outlet of the reservoir by flexible tubing 545.
- the flow rate can be changed at the outlet of the device.
- Another interesting way of regulating the flow of liquid leaving the reservoir consists in restricting the arrival of air therein instead of restricting the outlet of water.
- the air intake with a laminar pressure drop 52 so that the volume flow rate of air entering the reservoir is much lower than that which would flow naturally.
- the dimension of the liquid outlet will then be calculated by a person skilled in the art so that its pressure drop is much lower than that of the air inlet. For example, for a water flow of 100 ml / month, in a tank whose altitude difference between points C and D would be 50 mm, the laminar pressure drop on the air will consist of a spiral engraved with length lm and depth 110 mm.
- the water outlet 53 would consist of a capillary tube 40 mm long and 400 mm in diameter.
- a constant flow can be ensured by providing this air inlet with a tube 54 plunging into the tank.
- a constant pressure is then imposed at the injection point equal to Pa-pg ⁇ h Pascals where Pa is the atmospheric pressure, ⁇ h is the difference in elevation between the point E of the pipe outlet and the point F of the liquid outlet at the outside, p the density of the liquid and g the acceleration of gravity.
- FIG. 11 shows a variant solution illustrated in FIG. 11 making it possible to completely avoid a return of liquid in the capillary element consists in placing, between the liquid surface and the capillary, an extremely flexible membrane 58 which physically separates the liquid and the gas.
- FIG. 12 shows a reservoir with controlled air intake, the air intake and the liquid outlet of which are located in a reservoir cap, in the lower part thereof.
- the tube 54 which will preferably be U-shaped and the protective tank 55 provided with its inputs and outputs 56 and 57.
- FIG. 13 gives an example of adjustment of the laminar pressure drop of the spiral type by means of shutters 59 distributed along the channel and making it possible to bring different points of this channel into contact with the surrounding atmosphere.
- the useful length of this channel is thus easily changed.
- the flow, which is proportional to it when the section of the channel is constant, is therefore also modifiable by this device.
- By closing all the orifices for contact with the atmosphere, a start-up function is added to the previous one.
- FIG. 14 gives an example of a device making it possible to perform the same function by plugging the orifices by means of balls 61 or seals placed on angular sectors 62.
- the rotation of the cover 63 makes it possible to close one or the other of the orifices, which makes it possible to carry out the adjustments and the commissioning.
- Variable obturation of the channels can be done in all the cases mentioned in the description and the methods for doing so are very varied.
- the flow rate of the liquid leaving the reservoir is very low but continuous.
- the appended figures 15 to 21 illustrate different embodiments of means allowing the intermittent delivery of the liquid.
- FIG. 15 illustrates an embodiment of an apparatus for creating an intermittent flow of fluid from a continuous flow of said preferably low-flow fluid.
- the device comprises a chamber 101 formed by a fixed bottom 102 and a movable bottom 103, the quasi-cylindrical wall 104 of which is a metal bellows.
- the assembly is surrounded by a cylindrical envelope 105 provided with a return 106 making it possible to compress a spring 107 situated between the movable bottom 103 of the chamber 101 and the fixed return 106 of the envelope 105.
- the fluid is introduced in a controlled manner at 108 in the chamber 101.
- On the fixed bottom 102 is placed a small cylindrical chamber 109 comprising a return 110 which makes it possible to limit the travel of a cylindrical shutter 111 supporting a seal 112.
- the shutter 111 is free to move axially in the chamber 109. In the absence of external stresses, it naturally tends to descend into the bottom of the chamber 109 under the effect of gravity.
- the movable bottom 103 is provided with an outlet pipe 113 which is linked to it and a pipe 114 which is also linked to it, placed in the chamber 101, the end 115 of which can penetrate into the chamber 109 and come into contact with the seal 112 of the movable shutter 111.
- the two pipes are interconnected by the same internal conduit 116 of sections.
- the apparatus operates in the following manner: On start-up, the chamber 101 is preferably filled with the fluid to be dispersed.
- the piping 114 is supported on the seal 112 of the shutter 111 which is at the bottom of the chamber 109.
- the pressure in this chamber 101 becomes equal to that resulting from the action of the spring 107.
- the spring 107 exerting a force FI, the section of the chamber being S, the pressure P in the chamber is equal to ⁇ ⁇ / S.
- the shutter becomes integral with the end 115 of the pipe 114, the latter being closed due to the presence of the seal 112.
- the vertical force F2 acting on the shutter is equal to sP.
- the dimensioning of the assembly is such that this force is greater than the weight of the shutter 111.
- the fluid, penetrating into the chamber 101, causes the displacement of the bottom 103, and consequently of the assembly formed of the piping 114 and the shutter 111.
- the shutter thus driven rises in the chamber 109 until it reaches the return 110.
- the shutter In contact with the return 110, the shutter detaches from the pipe 114 and falls back, under the effect of gravity , in the bottom of the chamber 109.
- the fluid contained in the chamber 101 can then escape through the bore 116 formed in the pipes 113 and 114.
- the volume of the chamber 101 decreases until the seal 112 of the shutter 111 is again in contact with the end 115 of the pipe 114, which stops the liquid outlet.
- the process can then start over and over again.
- This first version of the device corresponding to FIG. 1 assumes that the system is placed vertically so that the shutter 112 tends to descend naturally to the bottom of the chamber 109.
- FIG. 16 which represents another embodiment of the invention, the shutter 112 has been connected to the fixed bottom 102 by means of a spring 117 of very low stiffness, the other elements of the device remaining unchanged, with the exception of the discharge pipe 113 which is provided with a device 118 making it possible to create a dispersion of fine droplets thanks to the implementation of a rotating flow, a process used in commercial aerosol cans.
- the chamber 101 is pressurized by an elastic membrane 19 in place of the spring 107.
- the force F is created by the elongation of said membrane.
- the shutter device is produced by a membrane 120, integral with the fixed bottom 102. In FIG. 3, this device is shown at mid-stroke. It is linked to the pipe 114 by the aforementioned pressurizing effect.
- the membrane 120 tightens, until this tension force exactly compensates the force F2 resulting from the pressure difference between the chamber 101 and the outlet on the section of the piping. 114. At this moment, the membrane suddenly disengages from the pipe 114, falls back onto the bottom of the chamber 101. After emptying this chamber, the piping 114 joins the membrane 120, is fixed there by suction and the cycle can start again.
- the supply of the chamber 101 is carried out through a laminar pressure drop 121 constituted by a spiral channel 122 formed by the cooperation of a flat pellet 123 and a pellet 124 engraved with a spiral-shaped groove 125.
- Figure 4 gives a detail of this supply. In the case of Figure 3, the groove is engraved in the coin
- FIG. 3 there is shown a fluid outlet 129 secured to the bottom 103 intended to create a dispersion of droplets.
- a cylindrical chamber 130 is fed from the tube 116 through two liquid inlets 131 tangentially penetrating said chamber. The fluid is thus rotated in the chamber 130 and escapes therefrom through a small diameter orifice 132 in the form of a conical sheet which dissolves in droplets.
- FIGS. 18a and 18b give a perspective representation of the spiral laminar pressure drop which makes it possible to supply the chamber 101.
- the parts 102 and 126 are shown diagrammatically by two cylindrical pellets. The fluid penetrates in
- Patent application PCT / FR 92/01075 describes another embodiment of a channel with a very small passage section by association of a cylinder and a helical spring wound on said cylinder. Such a very low flow device could be substituted for that shown in FIGS. 17 and 18.
- FIG. 19 a variant of the above devices has been shown, characterized in that the detachment of the shutter is ensured by the action of a bending spring 134, a process which we will call an assistance system.
- the shutter is driven, as before, by the pipe 114, which is provided with a projection 135.
- the pipe 114 is raised, the spring, the end of which
- the spring 136 is, at the start of the filling, located above the protuberance, is pressed on said protuberance and progressively bandaged upwards. At a critical point corresponding to the maximum stroke, the spring is sufficiently bandaged so that the protrusion 135 cannot retain it. The spring then relaxes downwards and drives the shutter, thus improving the reliability of the opening. During the descent of the pipe 114, the protuberance again exceeds the end 136 of the spring, which is thus reset. The piping draws in the shutter and the cycle can start again.
- FIG. 20 there is shown a pneumatic pressurization device located inside the chamber 101.
- the chamber 138 contains a gas under pressure and can deform due to the presence of an elastic membrane 136 which constitutes the cylindrical side walls of the device.
- the rigid movable bottom 137 of the chamber 138 is provided with a shutter 111 to which it is connected by a spring 117 by means of a rigid internal cylindrical partition 139.
- the walls of the chamber 101 are rigid. The operation is then as follows: when the device is put into service, the liquid is introduced at 108 into the chamber 101. The volume of the chamber 138 therefore decreases and the bottom
- FIG 21 there is shown the system for controlling the filling flow rate by using a spiral channel 121 as well as the outlet head for producing droplets.
- the fluid to be dispersed comes, in this example, from a pressurized commercial bomb 134 containing the fluid to be dispersed.
- the system is integrated into an assembly making it possible to start the bomb by simply snapping on the part 135, this operation in turn controlling the opening of the bomb valve by driving in the outlet pipe of said bomb. .
- This provides an aerosol generator operating intermittently from an autonomous tank.
- the device which is the subject of the invention is connected by a thread to the part 141.
- a fluid which can be a perfume, an antiseptic or even water to control the humidity of a room.
- this can also be a gas.
- the control of the flow of liquid out of the tank is in fact done by the control of the air flow admitted into this same tank. More specifically, it is ambient air which is therefore at atmospheric pressure. For certain applications it may be advantageous to control an already pressurized fluid flow. This is what is illustrated in FIGS. 22 to 24.
- FIG 22 there is shown a pressure-resistant reservoir 200 with its outlet capillary 202 and its support structure 204 making it possible to maintain the reservoir 200 in a vertical position so that its outlet is at the lower end.
- a liquid diffuser 206 Inside the tank 200 is disposed a deformable sealed envelope 208 which contains the liquid to be diffused.
- the envelope 208 is of course connected to the outlet 202.
- an initially substantially empty envelope 210 which is also sealed and deformable.
- the envelope 210 is connected by an orifice 212 formed in the bottom 214 of the reservoir with a capillary pressure drop device 216 which is for example of the engraved groove type.
- a deformable sealed enclosure 218 which contains an intermediate fluid such as a mixture of water and glycol.
- the enclosure 218 is connected to the inlet 220 of the capillary pressure drop device 216.
- a means of pressurizing the envelope 218 is for example constituted by a cover 222 which surrounds the envelope 218 and which can slide on the walls external of the reservoir 200.
- Elastic systems such as 224 tend to apply the cover 222 to the enclosure 218 and therefore to compress the intermediate liquid contained in the envelope 218.
- the latter leaves with a controlled flow rate through the loss device of charge 216 to gradually fill the envelope 210, which increases the pressure on the envelope 208 containing the liquid to be diffused, thus authorizing its exit with a flow rate controlled by the outlet capillary 202.
- the pressure-resistant reservoir 230 contains a flexible, sealed envelope 232 in which the fluid to be delivered is stored.
- the outlet of the casing 232 is connected to a pressure drop device 234 ensuring a relatively reduced pressure drop.
- a second pressure drop device for example of the engraved groove type 236, the outlet 236a of which opens into the reservoir 230.
- the device 236 has a much higher pressure drop than that of the device 234.
- the inlet 236b of the pressure drop means is connected to a high pressure tank containing an engine gas, the tank being referenced 238.
- the high pressure tank makes it possible to maintain a substantially constant pressure of the fluid passing through the device. pressure drop 236.
- the gas thus fills with a controlled flow rate the reservoir 230 thus applying pressure to the deformable envelope 232, which in turn allows the controlled exit of the liquid, this control being further reinforced by the presence of the second pressure drop 234.
- the device also comprises a reservoir 230 in which is placed a deformable envelope 232 containing the liquid to be diffused.
- the casing 232 is directly connected to the outlet capillary 240.
- the pressure drop device 236 is supplied with a pressurized gas obtained in the following manner.
- a pressurized gas tank 242 into which the gas can be periodically introduced using a syringe-type device 244.
- a regulator 246 is interposed between the pressurized gas contained in the tank. 242 and the inlet 236b of the pressure drop device. Referring to FIG.
- the device consists of a tight and pressure-resistant reservoir 260 provided with its capillary outlet tube 262.
- the reservoir 260 is held in vertical position by a support element 264 in the form of a cylindrical skirt whose periphery 266 cooperates with the cylindrical wall of the reservoir 260 secured to the latter, for example by a clipping means 268.
- the bottom of the reservoir 260 is preferably constituted by a pressure drop device 270 of the engraved groove type.
- the inlet 270a of the channel of the pressure drop device is connected to an air intake 272 which is for example constituted by a gap between the reservoir 260 proper and a thermal protection skirt 274.
- the outlet 270b of the pressure drop device is connected to an outlet capillary 276 which is vertical and axial.
- the capillary 276 opens into a container 278 forming a weir.
- the container 278 is connected to an outlet tube 280 by its discharge edge 282.
- the end 280a of the tube 280 opens into the liquid contained in the reservoir 260.
- the enclosure 278 makes it possible to avoid an untimely entry of liquid into the pressure drop control device.
- the support element 264 has on its base plate 283 a cup 284 which is arranged opposite the outlet capillary 262 so that the free end 262a of this capillary enters the well 284.
- the bottom of the bucket 284 comprises a seal 286.
- the base plate 283 of the support device has orifices 288 for the outlet of the liquid.
- FIG. 26 we will describe a variant of the device shown in Figure 25 and a preferred example of use of this variant.
- This alternative embodiment essentially consists in separating the reservoir 300 containing the liquid to be diffused from the pressure drop device for controlling the air intake 302 and in bringing these two components together by flexible tubing 304. This arrangement is particularly favorable to allow the diffusion in a toilet bowl of a deodorant or disinfectant product.
- the reservoir 300 is placed for example in the flush 306 while the pressure drop device 302 is of course placed outside.
- the pressure drop device essentially comprises a housing 308 comprising an air intake 310 which is connected to the inlet of the channel 312 of the pressure drop device itself 314.
- the outlet 316 of the channel 312 is connected to an outlet opening 318 which is itself connected to one end of the flexible tube 304.
- the reservoir 300 has exactly the structure described in connection with FIG. 25 except for the fact that its bottom 320 is closed and is provided with a nozzle 322 which crosses the bottom 320 and which is connected to the pipe 304.
- the air flow rate controlled by the loss of flow device load 314 is thus introduced into the reservoir 260 which contains the liquid to be diffused.
- the pressure drop devices were, according to one embodiment, constituted by two planar opposite faces. On one of the facing faces is dug a groove of great length and very small cross section constituting the channel of the pressure drop device.
- Figures 27 and 28 there are shown two alternative embodiments of the pressure drop device. In each of these two modes, there is a central part 400 for example in the form of a disc which has two flat faces 402 and 404 in each of which a groove is dug, for example in the form of a spiral, referenced 406, 408. Each of these grooves thus constitutes a laminar pressure drop channel.
- the pressure drop device has an inlet 410 formed in the outer housing 412 of the device.
- This input 410 is used to supply the input of each of the channels 406 and 408.
- a first output 414 corresponding to the groove 406
- a second output 416 corresponding to the groove 408.
- FIG. 27 also shows an improvement which consists in improving the seal between the part 400 on which the grooves are engraved and the second face.
- This improvement consists in the installation of a deformable sheet 418, 420 interposed between the face comprising the groove and the counter face.
- the counter face is not planar but has for example concentric ribs 422 whose dimensions are much greater than those corresponding to the groove.
- the ribs 422 effectively apply the sealing sheet 418 on the face in which the groove is formed, but, on the one hand because of the reduced surface of the groove and on the other hand by the spacing of the ribs, the sheet does not enter the groove.
- the sheet 418 (or 420) may consist of a thin layer of relatively hard material in contact with the groove and a thicker and more deformable layer facing the ribs.
- the central part 400 also has on each of its faces grooves respectively referenced 406 and 408.
- the channel formed by the groove 408 has an axial inlet 430.
- an annular groove 432 which communicates the second end of the groove 408 with the first end of the groove 406.
- the second end of the groove 406 is connected to an outlet opening 434.
- each channel preferably has a "sinusoidal" shape in order to increase the length of the channel for a given diameter of the piece 450.
- Each channel has an inlet A and an outlet B.
- the channels have different cross sections therefore corresponding to different flow rates while remaining within the framework of the general definition of these channels.
- the channel sections are in ratios 1, 2, 4, 8.
- the part 450 is associated with a rotary inlet distributor 454 which makes it possible to connect the fixed liquid supply pipe 456 to any combination of the different channels. It is thus possible to continuously adjust the overall flow rate in ratios from 1 to 15.
- the distributor can be replaced by controllable valves, each valve being mounted between the supply line 456 and the inlet of a channel 450.
- the viscosity of the liquid circulating in the different channels depends on the ambient temperature. We pass indeed for an aqueous solution with a dynamic viscosity of 1.8.10 ⁇ 3 Pa.s at 0 * C to a viscosity of 0.7.10 ⁇ 3 Pa.s at 40 * C. If we want to make the device insensitive to temperature, it is therefore necessary to adapt the effective length of a channel to variations in viscosity due to variations in temperature. More precisely, the more the temperature increases, the more the effective length of the channel must be reduced.
- each channel 450 provision is made in room 452 for each channel 450, n orifices opening into the corresponding channel, from the outlet B of the channel, at channel lengths associated with the temperature corrections to be made. For example, four are provided corresponding to the increasing temperatures T, T2, T3 and TM, the temperature Tp causing the total closure of the channel and therefore of the device for temperature outside the range of use.
- the orifices 458 of the channels corresponding to the same temperature are interconnected by a passage 460 formed in the underside 452a of the part 452.
- Each passage 460 corresponding to a regulation temperature is associated with a controllable shutter 462.
- the passages 460 are connected, via the shutters 462 to an outlet pipe 464 formed in the part 466. The closing of a shutter 462 is controlled as soon as the associated regulation temperature is reached. For example, regulator 462 ⁇ is closed at temperature T ⁇ , regulator 4622 at temperature T2, etc.
- FIGs 33 illustrate a preferred embodiment and control of the shutters 462.
- Each shutter 462 is constituted by a cavity 470 which has a first face 472 and a second face 474.
- first face 472 open two orifices 476 and 478 respectively connected to one of the passages 460 and to the outlet pipe 464.
- a deformable diaphragm 480 which is integral by its periphery with the face 474.
- the control member consists of a liquid having a high coefficient of thermal expansion such as alcohol. This liquid is contained in an enclosure 482.
- This enclosure 482 is in relation to the rear face of the membrane 480 by an orifice 484.
- each enclosure 482 When the temperature increases, the liquid contained in the enclosure 482 expands and its 0 expansion causes the deformation of the central part of the diaphragm 480. The latter is pressed against the face 472 of the cavity 470 thus obstructing the orifices 476 and 478.
- the volume of each enclosure 482 is determined in such a way that, below its set temperature T ⁇ the diaphragm 480 does not close the orifices 476 and 478 and that, from this temperature Tj, the diaphragm closes the orifices by occupying the position shown in FIG. 33b.
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- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
- Loading And Unloading Of Fuel Tanks Or Ships (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/530,179 US5755364A (en) | 1993-03-09 | 1994-03-04 | Device for dispensing fluid at very low flow rates from a container |
EP94909146A EP0687240A1 (fr) | 1993-03-09 | 1994-03-04 | Dispositif pour delivrer de tres faibles debits de fluide contenu dans un reservoir |
JP6519658A JPH08507278A (ja) | 1993-03-09 | 1994-03-04 | 容器からの極低速流体分配装置 |
AU62099/94A AU6209994A (en) | 1993-03-09 | 1994-03-04 | Device for supplying low fluid flow rates from a container |
BR9406130A BR9406130A (pt) | 1993-03-09 | 1994-03-04 | Um dispositivo para distribuição de fluido a vazões muito baixas a partir de um recipiente |
Applications Claiming Priority (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9302792A FR2702455B1 (fr) | 1993-03-09 | 1993-03-09 | Procedes et appareils pour le controle de faibles debits de fluide sur des reservoirs autonomes. |
FR93/02792 | 1993-03-09 | ||
FR93/04306 | 1993-04-13 | ||
FR9304306A FR2703980B1 (fr) | 1993-04-13 | 1993-04-13 | Dispositif pour diffuser ou pulveriser de faibles quantites de fluide. |
FR9308449A FR2702465B3 (fr) | 1993-03-09 | 1993-07-07 | Procédés et appareils pour le contrôle de faibles débits de fluides à partir de réservoirs autonomes. |
FR93/08449 | 1993-07-07 | ||
FR93/11137 | 1993-09-10 | ||
FR9311137A FR2709825B1 (fr) | 1993-09-10 | 1993-09-10 | Dispositif pour injecter un fluide de manière intermittente. |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1994020390A1 true WO1994020390A1 (fr) | 1994-09-15 |
Family
ID=27446881
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR1994/000236 WO1994020390A1 (fr) | 1993-03-09 | 1994-03-04 | Dispositif pour delivrer de tres faibles debits de fluide contenu dans un reservoir |
Country Status (7)
Country | Link |
---|---|
US (1) | US5755364A (fr) |
EP (1) | EP0687240A1 (fr) |
JP (1) | JPH08507278A (fr) |
AU (1) | AU6209994A (fr) |
BR (1) | BR9406130A (fr) |
CA (1) | CA2157666A1 (fr) |
WO (1) | WO1994020390A1 (fr) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2730325A1 (fr) * | 1995-02-08 | 1996-08-09 | Tournassat Claude | Dispositif pour delivrer de tres faibles debits de fluides de maniere controlee |
WO1997025662A1 (fr) * | 1996-01-11 | 1997-07-17 | Claude Tournassat | Procede et appareils pour doser et evaporer des liquides et les disperser dans de grands volumes de fluides |
FR2743553A1 (fr) * | 1996-01-11 | 1997-07-18 | Tournassat Claude | Procedes et appareils pour doser et evaporer des liquides et les disperser dans de grands volumes de fluides |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2360513A (en) * | 2000-03-20 | 2001-09-26 | Waddington & Duval Ltd | Flat spiral flow control apparatus |
US6350196B1 (en) * | 2000-09-15 | 2002-02-26 | Bruce A. Mott | Disinfectant distribution system for heating and cooling ducts |
JP4568530B2 (ja) * | 2004-05-06 | 2010-10-27 | 東洋エアゾール工業株式会社 | エアゾール装置 |
USD636668S1 (en) | 2008-03-24 | 2011-04-26 | Mary Kay Inc. | Dip tubes |
US8376192B2 (en) | 2008-03-24 | 2013-02-19 | Mary Kay Inc. | Apparatus for dispensing fluids using a press-fit diptube |
US9789502B2 (en) | 2008-06-05 | 2017-10-17 | Mary Kay Inc. | Apparatus for dispensing fluids using a removable bottle |
DE102009006431B4 (de) * | 2009-01-23 | 2010-12-30 | Ing. Erich Pfeiffer Gmbh | Austragvorrichtung |
CN102656094B (zh) * | 2009-12-14 | 2016-01-20 | 花王株式会社 | 挤压式容器用盖 |
JP5733969B2 (ja) * | 2010-02-19 | 2015-06-10 | 花王株式会社 | スクイズ容器用キャップ |
US20120312895A1 (en) * | 2011-06-09 | 2012-12-13 | S.C. Johnson & Son, Inc. | Fluid Dispensing Device for Discharging Fluid Simultaneously in Multiple Directions |
JP6189094B2 (ja) * | 2013-06-06 | 2017-08-30 | 株式会社ダイゾー | 吐出装置及びそれを用いた二液吐出装置 |
FR3017312B1 (fr) * | 2014-02-07 | 2021-01-15 | Sylvain Reynier | Appareil pour distribuer un fluide a pression sensiblement constante |
BR112019020672A2 (pt) * | 2017-04-02 | 2020-05-05 | Biofeed Env Friendly Pest Control Ltd | dispositivo para liberação contínua de um fluido em uma taxa quase ótima |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2090556A5 (fr) * | 1970-04-23 | 1972-01-14 | Pittway Corp | |
EP0028032A1 (fr) * | 1979-10-30 | 1981-05-06 | Otto Berkmüller | Récipient pour la distribution de produit liquide ou pâteux à l'aide d'un gaz propulseur |
GB2186949A (en) * | 1986-01-23 | 1987-08-26 | Bespak P L C | A flow control device |
WO1990009936A1 (fr) * | 1989-02-27 | 1990-09-07 | L. Givaudan & Cie S.A. | Robinet pour recipient distributeur d'aerosol |
WO1993010389A1 (fr) * | 1991-11-20 | 1993-05-27 | Helispire | Dispositif pour restreindre un ecoulement d'un fluide |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3951174A (en) * | 1970-01-16 | 1976-04-20 | Conant James E | Tube orifice for pressure dispensing container |
US3980110A (en) * | 1975-01-29 | 1976-09-14 | Tribotech Incorporated | Flow metering device |
US4739901A (en) * | 1985-05-20 | 1988-04-26 | Adolph Coors Company | Apparatus for use in dispensing fluid from a container |
-
1994
- 1994-03-04 JP JP6519658A patent/JPH08507278A/ja active Pending
- 1994-03-04 AU AU62099/94A patent/AU6209994A/en not_active Abandoned
- 1994-03-04 US US08/530,179 patent/US5755364A/en not_active Expired - Fee Related
- 1994-03-04 BR BR9406130A patent/BR9406130A/pt unknown
- 1994-03-04 WO PCT/FR1994/000236 patent/WO1994020390A1/fr not_active Application Discontinuation
- 1994-03-04 EP EP94909146A patent/EP0687240A1/fr not_active Withdrawn
- 1994-03-04 CA CA002157666A patent/CA2157666A1/fr not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2090556A5 (fr) * | 1970-04-23 | 1972-01-14 | Pittway Corp | |
EP0028032A1 (fr) * | 1979-10-30 | 1981-05-06 | Otto Berkmüller | Récipient pour la distribution de produit liquide ou pâteux à l'aide d'un gaz propulseur |
GB2186949A (en) * | 1986-01-23 | 1987-08-26 | Bespak P L C | A flow control device |
WO1990009936A1 (fr) * | 1989-02-27 | 1990-09-07 | L. Givaudan & Cie S.A. | Robinet pour recipient distributeur d'aerosol |
WO1993010389A1 (fr) * | 1991-11-20 | 1993-05-27 | Helispire | Dispositif pour restreindre un ecoulement d'un fluide |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2730325A1 (fr) * | 1995-02-08 | 1996-08-09 | Tournassat Claude | Dispositif pour delivrer de tres faibles debits de fluides de maniere controlee |
WO1997025662A1 (fr) * | 1996-01-11 | 1997-07-17 | Claude Tournassat | Procede et appareils pour doser et evaporer des liquides et les disperser dans de grands volumes de fluides |
FR2743553A1 (fr) * | 1996-01-11 | 1997-07-18 | Tournassat Claude | Procedes et appareils pour doser et evaporer des liquides et les disperser dans de grands volumes de fluides |
Also Published As
Publication number | Publication date |
---|---|
CA2157666A1 (fr) | 1994-09-15 |
BR9406130A (pt) | 1995-12-12 |
EP0687240A1 (fr) | 1995-12-20 |
JPH08507278A (ja) | 1996-08-06 |
US5755364A (en) | 1998-05-26 |
AU6209994A (en) | 1994-09-26 |
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