WO2023195849A1 - Dispositif de régulation de pression pour contenant de fluide sous pression, et contenant de fluide sous pression comportant un tel dispositif de régulation de pression - Google Patents

Dispositif de régulation de pression pour contenant de fluide sous pression, et contenant de fluide sous pression comportant un tel dispositif de régulation de pression Download PDF

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Publication number
WO2023195849A1
WO2023195849A1 PCT/NL2023/050178 NL2023050178W WO2023195849A1 WO 2023195849 A1 WO2023195849 A1 WO 2023195849A1 NL 2023050178 W NL2023050178 W NL 2023050178W WO 2023195849 A1 WO2023195849 A1 WO 2023195849A1
Authority
WO
WIPO (PCT)
Prior art keywords
control device
pressure control
compartment
closing element
protruding guide
Prior art date
Application number
PCT/NL2023/050178
Other languages
English (en)
Inventor
Johannes Hubertus Jozef Maria Kelders
Eduard VAN VELDHOVEN
Wouter Marius Stinesen
Original Assignee
Mind Scouts Innovators B.V.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from NL2032413A external-priority patent/NL2032413B1/en
Application filed by Mind Scouts Innovators B.V. filed Critical Mind Scouts Innovators B.V.
Publication of WO2023195849A1 publication Critical patent/WO2023195849A1/fr

Links

Classifications

    • 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
    • B65D83/60—Contents and propellant separated
    • B65D83/66—Contents and propellant separated first separated, but finally mixed, e.g. in a dispensing head
    • B65D83/663—Contents and propellant separated first separated, but finally mixed, e.g. in a dispensing head at least a portion of the propellant being separated from the product and incrementally released by means of a pressure regulator
    • 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
    • B65D83/60—Contents and propellant separated
    • B65D83/64—Contents and propellant separated by piston

Definitions

  • Pressure control device for pressurized fluid container and pressurized fluid container provided with such a pressure control device
  • the present invention relates to a pressure control device for attachment in a pressurized fluid container separating a dispersible fluid compartment and a propellant compartment, comprising: a partition wall provided with at least one passage opening; and a closing element attached to the partition wall moveable between a passage opening release position and a passage opening closing position.
  • the present invention also relates to a pressurized fluid container provided with such a pressure control device.
  • Containers for pressurized dispersers fulfil multiple functions, including containing a fluid to be dispersed, and maintaining an overpressure inside the container for dispersing/dispensing of the fluid contained inside the container.
  • a fluid is broad; it may be a gas, a liquid, a gel, a paste, a mousse or any type of mixture of such components.
  • a well-known problem with common dispersers is that the pressure at which the fluid to be dispersed is contained, changes over time, due to the leakage of propellant from the container as well as the decreasing level of the fluid to be dispersed because of normal use of the disperser.
  • More advanced disperser containers are therefore pressure controlled, for which they are provided with a compartment containing a highly pressurized propellant.
  • the propellant compartment is furthermore provided with a pressure control valve that controls the outflow of propellant from the propellant compartment based on the pressure prevailing in the fluid to be dispersed, thereby keeping the fluid to be dispersed at a constant pressure.
  • pressure control devices are known, for instance as disclosed in WO 2018/185652.
  • the dispersible fluid compartment and the propellant compartment may be embodied as parts (spaces) of a joint mantle (for instance the joint jacket of a spray can) that are separated from each other by a separation wall, in which separation wall the pressure control device is allocated.
  • the propellant compartment is a completely enclosed container, which container is placed into or against a dispersible fluid compartment, and wherein the pressure control device is allocated in the wall of an enclosed part of or the fully enclosed (pressurized) container.
  • the object of the present invention is to provide an improved pressure control device and an improved pressurized fluid container provided with such a pressure control device that provides at least the same functionality as the prior art pressure control devices at for instance lower costs, with less functional limitations and/or with higher functional accuracy.
  • the present invention provides for this purpose a pressure control device for attachment in a pressurized fluid container separating a dispersible fluid compartment and a propellant compartment, comprising: a partition wall provided with at least one passage opening; and a closing element attached to the partition wall moveable between a passage opening release position and a passage opening closing position; wherein the partition wall is provided with a protruding guide element, wherein the closing element is surrounding the protruding guide element, and wherein the passage opening in the partition wall is allocated in or adjacent the protruding guide element.
  • An outline of the free side of the closing element may be forming the moveable closure of the at least one passage opening in the partition wall.
  • the closing element gets around (surrounds) the protruding guide element enabling a very compact construction that also requires a limited amount of material compared to the prior art pressure control device. This not only limits material consumption but also limits the price and/or simplifies the construction making the pressure control device less susceptible to malfunctioning and easer to assemble. As the construction is also limited in volume the efficiency of a pressurized fluid container provided with such a pressure control device will also increase compared to the prior art pressurized fluid containers.
  • a further advantage of the limited volume of the pressure control device according to the present invention is that the limited size also enables to put the pressure control device out of the centre of the partition wall (resulting in the pressure control device to be positioned out of the central axis of the pressurized fluid container wherein the partition wall is allocated).
  • the “out of centre” positioning of the pressure control device in the partition wall a central position in the partition wall is not occupied and may be used to allocate there centrally a valve which may be used for filling the propellant compartment of the pressurized fluid container through the dispersible fluid compartment.
  • pressurized fluid container to be filled (both with propellant and with dispersible fluid) from one side (the upper side) of the pressurized fluid container, providing the substantial advantage that existing filling equipment may be used without the need of further investments and thus lowers the threshold to switch to the sustainable solution according to the present invention.
  • the closing element and the protruding guide element are preferably moveable connected such that the closing element and the protruding guide element are gastight enclosing a pressure chamber.
  • This gas-tight enclosed pressure chamber when at least partially compressed is exerting a pressure on the inside of the closing element forcing the closing element away from the at least one passage opening, and when the external pressure in the dispersible fluid compartment is not able to withstand the pressure in the pressure chamber, thus opening the aperture in the passage opening in the separation wall, preferably by moving the outline of the free side of the closing element away the at least one passage opening in the partition wall.
  • the result of opening the (at least one) aperture is that propellant will flow from the propellant compartment in the dispersible fluid compartment until the pressure in the dispersible fluid compartment is risen to a level that the closing element is pushed back (against the pressure in the pressure chamber) to the position wherein the closing element seals off the passage opening in the separation wall.
  • a further relevant advantage of the present invention is that any gas pressure dissipation of the pressure in the (in practise not completely gas-tight) pressure chamber with the environment is that this dissipation (limited gas exchange) takes place between the pressure chamber and the propellant compartment (this phenomenon is also referred to as “low-leaking”). Gas will thus not leave the pressure chamber but only a limited volume of gas may flow into the pressure chamber from the propellant compartment over time.
  • the pressure chamber will thus not loose pressure to a level that the pressure control device is not able to open the passage opening anymore; it will due to the minimal leakage result in a (limited) higher pressurised pressure chamber that opens at a higher pressure level.
  • the pressure control device will not open anymore resulting in that a not completely emptied dispersible fluid compartment can no longer be emptied.
  • Such dysfunctioning occurs frequently in practice and is overcome by the present invention.
  • the closing element is hood-shaped.
  • Such a simple cap-shaped construction off the closing element is simple to produce, compact and relatively simple to be guided along the protruding guide element.
  • a specific and very simple cup shape is in cross section U-shaped, thus not possessing a border or rim that protrudes from an upright sidewall of the closing element.
  • the closing element is circle symmetrical, simplifying the positioning and functioning of the closing element.
  • the hood-shaped closing element is preferably enclosing at least the extremity of the protruding guide element, so that the pressure chamber is allocated between the protruding guide element and the closing element.
  • the protruding guide element is surrounded by a slot-shaped channel, which slot-shaped channel may be recessed in the partition wall.
  • the slot-shaped channel is supportive in holding in position of the closing element, especially in the position wherein the closing element is in its passage opening closing position.
  • the advantage of the slot-shaped channel surrounding the protruding guide element may limit the height of the protruding guide element required for proper functioning of the pressure control device according to the present invention.
  • the at least one passage opening may well be allocated in the slot-shaped channel. Such will help to protect the passage opening against contamination but even more will help to ensure a correct closing of the passage opening by the closing element.
  • the inside of the closing element and/or the outside of the protruding guide element may be covered with a flexible sealing material layer.
  • a single material closing element may be used, in which situation the material choice is preferable so that the material of the closing element has sealing properties.
  • the inside of the closing element contacting the protruding guide element or the outside of the protruding guide element contacting the closing element may be provided with a (annular) sealing element.
  • the protruding guide element may be cylindrical, thus simplifying the assembly of the pressure control device.
  • the shape of the closing element and the shape of the protruding guide element are connected to each other also the side of the closing element contacting the protruding guide element will then be cylindrical, and more preferably also the outside of the closing element may then be cylindrical.
  • the protruding guide element may be stationary connected with at least one support that externally seizes on (or guides) the closing element.
  • Such external closing element support may also be provided with an abutment limiting the maximum freedom of movement of the closing element. With such abutment the closing element may not come off the protruding guide element.
  • the position of the protruding guide element on the partition wall may be chosen as fit in a specific application, for instance may the protruding guide element be centrally located if the partition wall is more or less circular, but as already mentioned before due to the limited size of the closing element according to the present invention the protruding guide element may also be located decentralized in the partition wall.
  • the invention also provides a pressurized fluid container provided with a pressure control device according to the present invention, wherein the pressure control device is attached in the pressurized container separating a dispersible fluid compartment from a propellant compartment such that the at least one passage opening in the separating wall is the only fluid-permeable connection between the dispersible fluid compartment and the propellant compartment.
  • the pressurized fluid container thus includes a dispersible fluid compartment, a propellant compartment as well as the pressure control device.
  • the pressurized fluid container will even more also include a disperser nozzle to release the fluid to be dispersed under (the regulated) pressure from the dispersible fluid compartment.
  • the shape of the pressurized fluid container is free of choice, however in practise cylindrical spray cans are used, which may for instance be made out of aluminium, tin plate material or a plastic like for instance PET.
  • the partition wall may be disc-shaped, separating the dispersible fluid compartment and the propellant compartment.
  • the propellant compartment may as an alternative also be embodied as an individual container that is placed in a larger dispersible fluid compartment, thus not limiting the shape of the propellant compartment other than that it has to fit within the dispersible fluid compartment and that it can withstand the pressure.
  • the pressure control device may be placed out of the central axis of the pressurized fluid container.
  • a central position in the partition wall is available to allocate there (centrally) a propellant filling valve connecting to the propellant compartment of the pressurized fluid container.
  • figures 1A, 1 B schematic side views on a pressure control device according to the present invention, wherein the position of a closing element is that is part of the pressure control device is varied; figure 2A a longitudinal cross-section of a bottom part of a pressurized fluid container according to the invention; figure 2B a cross-section through a detailed perspective view of a part of the pressurized fluid container shown in figure 2A; figure 3 a cross-section of a pressurized fluid container according to the invention; figure 4A a perspective view of a propellant compartment provided with a part of an alternative embodiment of a pressure control device according to the present invention; and figure 4B a longitudinal cross-section of a an further embodiment of a pressurized fluid container according to the invention incorporating the pressure control device as shown in figure 4A.
  • Figure 1 A shows a pressure control device 1 for attachment in a pressurized fluid container (see figure 2 and 3) having a partition wall 2 that is provided with a surrounding mounting edge 3.
  • a passage opening 4 enables a propellant (normally a gas) to pass the partition wall 2, at least as long as a closing element 5 is not closing off the passage opening 4.
  • the closing element 5 here is hood-shaped and surrounds a protruding cylindrical guide element 6 that is centrally allocated on the partition wall 2, which protruding guide element 6 is surrounded by a slot-shaped channel 7 that is recessed in the partition wall 2.
  • the passage opening 4 is allocated in the bottom of the slot-shaped channel 7.
  • the inside of the hood-shaped closing element 5 is covered with a flexible sealing material layer 8 on the bottom of which sealing material layer 8 an inside annular sealing element 9 (to be compared with an “O- ring”) seals off the contact between the closing element 5 and the protruding guide element 6, thus providing a gas-tight pressure chamber 30 with a volume that is variable due to the movement of the closing element 5 relative to the protruding guide element 6.
  • the partition wall 2 On the side of the slot-shaped channel 7 facing away from the protruding guide element 6 the partition wall 2 is provided with at least one external closing element guide 9, which external guide element 9 not only externally guides the closing element 5 but also functions as a limitation for the way of trajectory of the closing element 5 (see the abutment 10 on the outer end of the external guide element 9).
  • FIG 1 B the pressure control device 1 of figure 1A is shown however here the closing element 5 is in the “passage opening closing position” as the closing element 5 is moved (in the figure downwards) in comparison with the position of the closing element 5 in figure 1 A according the arrow Pi such that the closing element 5 seals off the passage opening 4. It is also depicted that the volume of the pressure chamber 30 in figure 1 B is substantially smaller than the volume of the gas-tight pressure chamber 30 in the situation shown in figurelA.
  • Figure 2A shows a longitudinal cross-section of the bottom part of a pressurized fluid container 10 provided with a pressure control device 1 according the present invention and as shown in the figures 1 A and 1 B.
  • the pressure control device 1 is attached in the pressurized container 10 separating a dispersible fluid compartment 11 from a propellant compartment 12 such that a propellant only through the passage opening 4 may flow from the propellant compartment 12 to the dispersible fluid compartment 11 , at least as long as the closing element 5 is not in the “passage opening closing position” as depicted in figure 2.
  • the pressurized container 10 is provide with an internal annular narrowing 13 (realised buy an external circumferential indention) against which narrowing 13 the wall partition wall 2 with its surrounding mounting edge 3 form-fitting abuts.
  • connection between the annular narrowing 13 and the surrounding mounting edge 3 of the partition wall 2 is thus medium-tight/gas-tight.
  • supports 31 are attached such that they are in a stationary position relative to the guide element 6, the supports 31 externally seize on the closing element 5 to keep it in a position that fits the protruding guide element 6.
  • abutments 32 stops are provided ensuring that the closing element 5 will not loosen from the protruding guide element 6.
  • Figure 2B shows a cross-section through a detailed perspective view of a part of the pressurized fluid container shown in figure 2A wherein the protruding guide element 6 and two protruding guide elements 31 are clearly visible.
  • the closing element 5 - that is shown in figure 2A - is left out in this figure. Also visible is the passage opening 4 in the partition wall 2.
  • the partition wall 2, the protruding guide element 31 and the supports 31 are all stationary attached to each other.
  • the abutment 32 that are part of the guides 31 and that prevent the - not shown - closing element 5 from coming loose from the protruding guide element 6.
  • Figure 3 shows a perspective external view on the pressurized fluid container 10 of which only the lower part was shown in figure 2.
  • a cylindrical shell 20 of the container 10 is provided with an circumferential indention 21 and on the outfeed (upper) side of the container 10 a neck 22 (also referred to as a “dispense valve opening”) and shoulder 23 are applied with a central outlet tube 24 that may be connected to a - not shown here - spray nozzle.
  • the upper side of the pressure control device 1 borders the fluid compartment 11 , in which fluid compartment 11 a piston 25. By a movement of the piston 25 towards the outlet tube 24 the fluid in the compartment 11 will be placed under pressure enabling to release a portion of the fluid to be dispersed.
  • the shape of the piston 25 may correspond with the shape of the upper side of the pressure control device 1 and/or the shape of the piston 25 may follow the contour of the closed top of the pressurized fluid container 10 while the piston 25 connects seamlessly but moveable to the inner cylindrical shell wall 20 preventing fluid to pass the piston 25 towards the pressure control device 1 , in fact the piston 25 prevents that the dispersible fluid will pass the piston 25.
  • the pressure control device 1 acts as a constant pressure release valve that opens for gas to pass from the propellant compartment 12 on the opposite side of the pressure control device 1 than the fluid compartment 11.
  • the propellant compartment 12 functions as a reservoir for a (highly) compressed propellant.
  • Suitable propellants include propane, butane, carbon dioxide, nitrogen, air or any other suitable substance.
  • a propellant is chosen that does not chemically react with the dispersible fluid especially when the propellant may contact the dispersible fluid (as may occur in a “diptube” embodiment).
  • the cylindrical shell 20 also comprises a bottom 26. In the depicted case, the cylindrical shell 20 and the bottom 26 are formed as a single, integral part. The bottom 26 is provided with another valve or releasable closing 27, enabling to pressurize the propellant compartment 12.
  • Figure 4A shows a propellant compartment 40 that is here not part of a larger construction but that as a “stand-alone” element.
  • the propellant compartment 40 is provided with (here) a part of an alternative embodiment of a pressure control device. Only the protruding guide element 6 is shown (thus not the closing element).
  • FIG 4B the propellant compartment 40 from figure 4A is shown in a slightly further amended embodiment that is attached to a dispersible fluid compartment 41.
  • the closing element 5 is shown thus providing an embodiment of a pressurized fluid container 43 according to the present invention.
  • a propellant filling valve 44 is shown which is allocated centrally in the pressurized fluid container 43.
  • the central positioning of the propellant filling valve 44 in the fluid container 43 enables to fill the propellant compartment 40 via the - here in an already closed off situation depicted - central upper opening 46.
  • the propellant filling valve 44 here shown is an umbrella valve 44 comprising a flexible head 47 (e.g. made out of silicone) that enables distortion for passage of a propellant that is brought in via a propellant filling opening 48.
  • a central propellant filling valve 44 may also be practised in for instance an embodiment of the pressurized fluid container 10 partially shown in the figures 2A and 2B wherein the pressure control device 1 is allocated decentrally.

Landscapes

  • 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)

Abstract

L'invention concerne un dispositif de régulation de pression destiné à être fixé dans un contenant de fluide sous pression séparant un compartiment de fluide dispersible et un compartiment de propulseur, comprenant une paroi de séparation comportant au moins une ouverture de passage ; et un élément de fermeture fixé à la paroi de séparation mobile entre une position de libération d'ouverture de passage et une position de fermeture d'ouverture de passage. L'invention concerne également un contenant de fluide sous pression comportant un tel dispositif de régulation de pression.
PCT/NL2023/050178 2022-04-07 2023-04-05 Dispositif de régulation de pression pour contenant de fluide sous pression, et contenant de fluide sous pression comportant un tel dispositif de régulation de pression WO2023195849A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
NL2031532 2022-04-07
NL2031532 2022-04-07
NL2032413 2022-07-07
NL2032413A NL2032413B1 (en) 2022-04-07 2022-07-07 Pressure control device for pressurized fluid container and pressurized fluid container provided with such a pressure control device

Publications (1)

Publication Number Publication Date
WO2023195849A1 true WO2023195849A1 (fr) 2023-10-12

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL2023/050178 WO2023195849A1 (fr) 2022-04-07 2023-04-05 Dispositif de régulation de pression pour contenant de fluide sous pression, et contenant de fluide sous pression comportant un tel dispositif de régulation de pression

Country Status (1)

Country Link
WO (1) WO2023195849A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105377718B (zh) * 2013-07-17 2018-08-24 爱柔包装技术集团有限公司 泡沫分配器
WO2018185652A1 (fr) 2017-04-03 2018-10-11 Gojara Bvba Dispositif de régulation de pression en forme de disque pour emballage sous pression
WO2018185656A1 (fr) * 2017-04-03 2018-10-11 Gojara Bvba Emballage sous pression à dispositif de commande de pression
US10246248B2 (en) * 2015-11-10 2019-04-02 Gojara Bvba Pressure control device, dispenser comprising said pressure control device and method of manufacturing

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105377718B (zh) * 2013-07-17 2018-08-24 爱柔包装技术集团有限公司 泡沫分配器
US10246248B2 (en) * 2015-11-10 2019-04-02 Gojara Bvba Pressure control device, dispenser comprising said pressure control device and method of manufacturing
WO2018185652A1 (fr) 2017-04-03 2018-10-11 Gojara Bvba Dispositif de régulation de pression en forme de disque pour emballage sous pression
WO2018185656A1 (fr) * 2017-04-03 2018-10-11 Gojara Bvba Emballage sous pression à dispositif de commande de pression

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