EP0202172A1 - Liquefied-gas bottle forming part or not forming part of a utility device - Google Patents

Abstract

1. Container (1, 12) for containing at least one liquid gas in both liquid and gaseous form, comprising : - a body (2) extending along at least one dimension (for instance height), having an upper wall (3, 12a) and a bottom (2a) : - a plug (9) of absorbent material contained by the said body, comprising a bore (9a) which extends along the said dimension, the said bore having an open end adjacent to the upper wall of the body, and another end beside the lower wall of the body ; - a bleeding area for gas only in the gaseous phase, through the upper wall of the body, in communication with the open end of the plug (9) ; - a feeding tube (6) positioned in the bore, extending along the said dimension, comprising one free end (6a) located within the latter, and connected by its other end with the outside of the container, hermetically with respect to the inside of the latter characterized in that, on the one hand, a bleeding device for gas only in the gaseous phase is positioned in the bleeding area, extends at least partly inside the body (2), and comprises an inlet and an outlet, and, on the other hand, the free end (6a) of the feeding tube (6) is positioned, without any contact with the plug, between the bleeding device and the bottom (2a) of the body (2), and the other end of the same tube is hermetically connected to the inlet of the bledding device.

Description

The present invention relates to containers for containing or storing a liquid gas.

By liquid gas is meant any body having in its storage conditions - (in particular pressure, temperature) two phases, namely liquid and gas, normally separated by an interface. It may be a liquefied gas, that is to say a body for which the liquid phase is in equilibrium with its vapor phase, the gas pressure inside the container then being equal to the pressure vapor from said body; in the first rank of liquefied gases are liquefied petroleum gases (or LPG), for example butane, by reference to which the present invention will be explained. It may also be a dissolved gas, that is to say a body whose gaseous phase is in equilibrium with a phase dissolved in an appropriate solvent, the latter constituting the liquid phase which has been discussed. previously. By body, we must understand in general terms, both a pure body and a mixture of pure bodies; thus the so-called commercial butane appears to be a mixture of butene and other hydrocarbons, for example butane.

As regards storage conditions, the liquid gas contained in the container may or may not be under pressure, the internal pressure within the container being less, greater than or equal to the ambient or external pressure, for example atmospheric. Likewise, the temperature of the liquid gas may or may not be lower than or equal to the ambient temperature; the containers according to the invention can be cryogenic storage, that is to say intended to store liquefied gases at very low temperature, for example liquid nitrogen.

• 1) ils peuvent être fixes ou mobiles, portables ou non, de petit ou grand volume ;
• 2) s'agissant des récipients portables, ils peuvent être rechargeables, et donc réutilisables, ou jetables, et donc à usage unique ;
• 3) s'agissant des récipients jetables, l'invention concerne aussi bien des récipients per- forables, que la pratique désigne sous fe nom de "cartouches", que des récipients présentant un dispositif de prélèvement particulier en phase gazeuse par exemple un robinet, une valve ou un clapet ;
• 4) s'agissant des récipients jetables avec valve, l'invention, concerne en particulier les générateurs d'aérosol, pour lequels le gaz liquide sert d'agent propulseur d'un autre corps divisé, solide ou liquide, contenu ou non dans le même récipient ;
• 5) enfin, les récipients envisagés par l'invention peuvent être ou non intégrés ou incorporés dans des appareils d'utilisation, consommant d'une manière ou d'une autre le gaz liquide sous forme gazeuse ; ainsi, pour un appareil avec brûleur alimenté par la phase gazeuse d'un gaz de pétrole liquéfié, un récipient selon l'invention peut être' un réservoir intégré dans l'appareil, rechargeable avec du butane commercial par exemple, prélevé à partir d'une cartouche.

The containers envisaged by the present invention can take different forms, in particular depending on their use.

• 1) they can be fixed or mobile, portable or not, small or large volume;
• 2) with regard to portable containers, they can be refillable, and therefore reusable, or disposable, and therefore for single use;
• 3) with regard to disposable containers, the invention relates both to perforable containers, which practice designates under the name of "cartridges", as containers having a particular sampling device in the gas phase, for example a tap, a valve or flap;
• 4) with regard to disposable containers with valve, the invention relates in particular to aerosol generators, for which the liquid gas serves as a propellant for another divided body, solid or liquid, whether or not contained in the same container;
• 5) finally, the containers envisaged by the invention may or may not be integrated or incorporated into apparatus for use, consuming in one way or another the liquid gas in gaseous form; thus, for a device with a burner supplied with the gaseous phase of a liquefied petroleum gas, a container according to the invention can be 'a tank integrated in the device, refillable with commercial butane for example, taken from a cartridge.

The present invention is concerned with containers as defined above, capable of delivering in the gas phase, and only in this form, the liquid gas which they contain. Indeed,. in most uses of the gas phase, the untimely withdrawal of the liquid phase, under the effect of various causes, for example an inadequate position of the container, leads to various drawbacks, even dangers. Thus, if we refer to a soldering lamp with gas burner, powered by a commercial butane cartridge, the lamp must be at the start held vertically, so that we are sure to take the gas only in gaseous form, that is to say in the gaseous sky of the cartridge. Any agitation, for example tilting of the cartridge, leads to a collection of drops of liquid phase, and to a direct combustion of the latter in the burner. As it is designed to work in the gas phase, the introduction of the liquid phase immediately causes the appearance of long clod flames, yellow in color, due to combustion without secondary air; for certain devices, for example domestic type, the appearance of such flames can be dangerous.

To retain the liquid phase of the gas, and only take the latter in the gaseous phase, it has been known for a very long time to "trap" this liquid phase on an absorbent material placed in the container. Throughout the present description and the claims, by absorbent material, it is necessary to understand a material having an apparent volume exceeding in a significant proportion its real volume, and therefore having a large surface developed, both internal and external, to retain the liquid phase of the liquid gas by surface tension. Such a material therefore has a significant proportion of voids. It may be a porous, fibrous material, or having any other shape, consistency, or texture, as long as it meets the preceding general definition, regardless of the nature of the material used, natural, mineral , organic, synthetic, etc ...

• -on part d'un tampon en matériau absorbant, en l'occurrence un matériau poreux tel que du charbon actif, lequel comporte un évidement borgne, allongé selon une dimension, en l'occurence la hauteur ;
• -on constitue autour du tampon une paroi étanche aux gaz et aux liquides jouant le rôle de corps du récipient, par projection d'une laque ou résine ;
• -on prélève le gaz liquide sous forme gazeuse, par un orifice laissé libre dans la paroi, matérialisé par un tube, en relation avec l'extrémité ouverte de l'évidement.

Thus, in accordance with British Patent 677,303, a container for liquid gas has already been proposed, obtained in the following manner:

• -on we start from a pad of absorbent material, in this case a porous material such as activated carbon, which comprises a blind recess, elongated along a dimension, in this case the height;
• -on constitutes around the buffer a gas and liquid tight wall playing the role of body of the container, by spraying a lacquer or resin;
• -the liquid gas is taken in gaseous form, through an orifice left free in the wall, materialized by a tube, in relation to the open end of the recess.

• a) conformément aux documents FR-A-897 877 et GB-A-654 045, on a par exemple proposé un bourrage en coton, c'est-à-dire en un matériau naturel, du type fibreux, et dont les fibres sont creuses (voir pages 17 et suivantes de l'ouvrage de O. ROEHRICH, intitulé "La fibre de coton", paru aux Editions de l'Industrie Textile en 1948) ;
• b) conformément au document GB-A-1 010 986, et s'agissant en particulier d' un réservoir rechargeable d'un briquet, on a proposé un remplissage complet dudit réservoir avec une mousse plastique, formée par exemple in situ, notamment du po- lyuréthane.

Various liquefied petroleum gases. absorbent materials have been proposed:

• a) in accordance with documents FR-A-897 877 and GB-A-654 045, for example, cotton stuffing has been proposed, that is to say in a natural material, of the fibrous type, and the fibers of which are hollow (see pages 17 et seq. of O. ROEHRICH's book, "Cotton fiber", published by Textile Industry Editions in 1948);
• b) in accordance with document GB-A-1 010 986, and in the case in particular of a refillable tank of a lighter, it has been proposed to completely fill said tank with a plastic foam, formed for example in situ, in particular of polyurethane.

Another proposed way to evacuate the liquid gas, only in gaseous form, consists depending on the shape and dimensions of the container, to adjust the amount of liquid gas introduced into the latter, depending on the position of the free end d '' a feeding tube, plunging inside and along the axis of the container, from a sampling device. Thus, according to patent US-A-2 465 643, and in the case of a welding lamp with cylindrical tank, the supply tube plunges to the middle of the tank which is half filled, so that, whatever the position of the welding lamp, the gas-liquid interface is flush with the level or is located below the free end of the supply tube.

Whatever the storage and / or withdrawal mode of the liquid gas, each of the solutions envisaged above leads, for a container of a given capacity, to store a limited quantity of the liquid gas, in any case an amount well below the available capacity of the container.

An example borrowed from the field of disposable valve cartridges, containing commercial butane, will help to better understand the previous point.

Suppose a valve cartridge, whose diameter and height are 40 mm and 125 mm respectively, and therefore a container whose height exceeds the width or diameter. The minimum useful volume, taking into account the size of the valve, is 135 cm ³ . In accordance with French regulations - (Dangerous Goods Transport Regulation article 301, paragraph 5, Official Journal of 18109161) and for safety reasons, part of this useful volume must be allocated to the gas phase (at least 5% to 50 ° C), and consequently the maximum volume that can be assigned to the liquid phase is 124.5 cm ³ , which, taking into account the density of commercial butane at 50 ° C, or 0.513 kg / l, represents a butane charge at most equal to 63.84 g, hereinafter called m _o .

Suppose that the same cartridge applies the solution according to American patent 2 465 643, that is to say incorporates a feed tube to halfway up this container. In this case, the maximum volume that can be allocated to the liquid phase is 67.5 cm 3, not taking into account the feed tube, which, taking into account the density of commercial butane at 50 ° C., represents a butane charge at most equal to 34.691, ie 54% of m _o .

Suppose that the same cartridge applies the solution according to British Patent 677,303 and that a pad of cellulose fibers, of paper pulp type, having the shape of a cylinder with an axial recess and occupying all of it, is therefore provided. of the container.

By neglecting the axial recess, and supposing that the real and apparent densities of the cellulose fibers used are 1.5 g / cm ³ and 0.11 g / cm ³ respectively, the minimum useful volume available is 121.4 cm ³ . Taking into account the same regulations as before, the maximum volume which can be assigned to the liquid phase of commercial butane is 115.3 cm 3, which corresponds to 50 ° C. at a butane charge at most equal to 59.16 g, hereinafter called m ,, and equal to approximately 93% of m _o .

Consequently, with a stuffing of cellulose fibers theoretically absorbing all of the liquid phase of the gas introduced into the cartridge, it is possible to approach the charge of the cartridge without stuffing, without seeing any liquid phase appear when the cartridge is emptied. in the gas phase.

The practice demonstrates, in this particular example and in the case of containers having a comparable geometry, results relatively far from the theory. With a recess having a diameter of 6 mm, and according to the test procedure defined below, the charge that can be introduced, without the appearance of a liquid phase during sampling, is 48 g, which represents 81% of the charge theoretical m ,, and 75% of the load m without jamming.

For a container with absorbent material, the present invention aims to increase the load of liquid phase that can be absorbed, for a given geometry and dimensions of the container.

According to the invention, a feed tube is provided in the recess, has a free end situated in the latter, without contact with the tampon, and communicates by its other end, in a sealed manner with respect to the interior of the container. , with a gas phase sampling device, located in the liquid gas sampling area.

By free end is meant the part of the supply tube comprising one or more orifices for withdrawing liquid gas in gaseous form. According to the invention, this free end is arranged at a distance from the wall of the recess of the tampon, for example in the center of the latter, to avoid any contact of the withdrawal orifice (or of its border) directly with the absorbent pad.

According to the invention, it is also essential that the inlet (in the direction of flow of the gas sampled) of the chosen sampling device, ensuring communication between the interior and the exterior of the container, communicates in leaktight manner with the end of the supply tube opposite the withdrawal orifice; tightness meaning that the junction between the tube and the sampling device is tight vis-à-vis the liquid phase of the gas, possibly present inside the container, in a free manner, that is to say outside absorbent material.

The experimental protocol explained below has demonstrated, for different absorbent materials, that thanks to the invention the maximum load in liquid form which can be introduced into a container, without the appearance of liquid phase (subsequently during sampling), could approach the load theoretical m ,, calculated as above.

• 1) La présence d'un tube d'alimentation permet de remplir le récipient, jusqu'à obtention de l'interface gaz-liquide au niveau, et pas au-delà, de l'extrémité libre du tube d'alimentation ; ceci représente, par exemple, une certaine hauteur h de phase liquide dans le récipient. Si la longueur t du tube est au moins égale à cette hauteur h, en retournant le récipient, on ne prélèvera pas de phase liquide ;
• 2) Sur cette hauteur h, le matériau absorbant va être saturé en phase liquide, et sur la hauteur restante du même matériau, en fonction de la hauteur d'ascension capillaire H de la phase liquide, on obtient un gradient de concentration liquide, d'une valeur maximale proche de l'interface, à une valeur nulle au voisinage de la hauteur h + H ;
• 3) Sans le tube d'alimentation, le matériau absorbant ne pourrait être imprégné avec la phase liquide que sur la hauteur H, en tout cas, si l'on désire un prélèvement continu en phase gazeuse.

Without being sure of the hypotheses put forward, the invention can be explained as follows:

• 1) The presence of a supply tube makes it possible to fill the container, until the gas-liquid interface is obtained at, and not beyond, the free end of the supply tube; this represents, for example, a certain height h of liquid phase in the container. If the length t of the tube is at least equal to this height h, by inverting the container, no liquid phase will be taken;
• 2) On this height h, the absorbent material will be saturated in the liquid phase, and on the remaining height of the same material, as a function of the capillary rise height H of the liquid phase, a liquid concentration gradient is obtained, d 'a maximum value close to the interface, to a zero value near the height h + H;
• 3) Without the supply tube, the absorbent material could only be impregnated with the liquid phase over the height H, in any case, if it is desired to continuously sample in the gas phase.

• -La figure 1 représente en coupe axiale un récipient jetable, du type générateur d'aérosol, ou cartouche à valve, selon l'invention ;
• -La figure 2 montre en coupe axiale une variante du récipient représenté à la figure 1.
• -Le figure 3 illustre en coupe axiale un autre récipient jetable, du type cartouche perforable, établi selon l'invention ;
• -La figure 4 représente de manière - schématique une chaîne de fabrication, en grande série, de cartouches à valve selon la figure 1.

The present invention is now described with reference to the appended figures in which:

• FIG. 1 represents in axial section a disposable container, of the aerosol generator type, or valve cartridge, according to the invention;
• FIG. 2 shows in axial section a variant of the container shown in FIG. 1.
• FIG. 3 illustrates in axial section another disposable container, of the perforable cartridge type, established according to the invention;
• FIG. 4 schematically represents a production line, in large series, of valve cartridges according to FIG. 1.

The gas cartridge 1 illustrated in fig. 1 comprises a body 2 produced in one piece by spinning or extruding an aluminum ingot as is well known. The body 2 has a bottom concave bottom 2a and an upper opening 2b bordered by a peripheral bead 2c. After filling the opening 2b is closed by a cup 3 whose periphery 3a is crimped relative to the bead 2c of the body 2, a seal 4 being disposed between these two elements so as to ensure a perfect seal. The center of the cup 3 has a hollow boss 3 b open downwards which retains a valve body 5 by centripetal constriction below a head 5a of said valve. This is associated in a sealed manner with a dip tube 6 disposed in a perforated chimney 7 extending in the axis of the body 2, and which is intended for the supply of gas. A filter 8 is placed between the valve 5 and the dip tube 6 so that the gas taken from the body 1 escapes, when desired, out of the valve 5 with only an extremely small number of suspended particles in suspension. impurities.

The perforated chimney 7 which is made of a suitable plastic material surrounds with clearance the dip tube 6 and constitutes a separation between an annular pad of absorbent material designated under the general reference 9, and said dip tube. In fact this pad 9 has an elongated central recess 9a so that the perforated chimney 7 forms an internal facing of the recess of this pad. It is observed that the recess 9a extends practically over the entire height of the body 2.

The perforated chimney 7 has an upper part 7a surrounding with play the corresponding part of the dip tube 6 and which ends in a flange 7b bearing on the top of the pad 9 which is itself at a certain distance below the cup 3 .

A tamper-evident cap 10 shown in broken lines comprises a central chimney 10a which cooperates with the interior of the peripheral part 3a of the cup 3 and an outer skirt 10b comprising in the known manner a lower annular projection 10c which engages elastically under the bead 2c of the body 2. The bottom of the skirt 10b is associated by means of a weakening line with a tearable guarantee strip 11 ensuring the authenticity of the contents of the cartridge 1, as long as it is not not destroyed.

It is observed that there is a gap not only between the head of the dip tube and the corresponding part of the perforated chimney 7, but also all along the tube between the latter and said chimney. The length of the tube 6 considered is such that its free end 6a is, whatever the position in the space of the cartridge 1, very slightly above a liquid-gas theoretical interface corresponding to the volume of the liquid gas contained in the available volume of the cartridge.

According to an advantageous embodiment of the invention the outlet of the supply plunger tube in the recess 9a is located at the median level of said recess.

In accordance with FIG. 2, the feed tube consists of a one-piece hollow part, closed at one end 6 this comprising two external annular ribs 6d and 6e. These ribs, similar to two transverse partitions, and more precisely perpendicular to the axis of the cartridge, delimit with the wall of the recess 9, and more precisely with the perforated chimney 7, a withdrawal cage 22, in which is included the free end 6a of the tube.

The two ribs or partitions 6 d and 6 e form spacers between the chimney 7 and the tube 6 and thus preserve the free end of the latter from any contact with the pad of absorbent material 9.

The partition 6 d provided at the free end 6a closes the supply tube and for withdrawal, the tube has two withdrawal orifices, or slots 6f extending between the two partitions 6 d and 6e.

In accordance with the embodiment of FIG. 2, the withdrawal opening (s) are protected in their immediate environment, against any particle or other dispersed form of absorbent material, interposed between the end. free from the feed tube on the one hand, and the absorbent pad on the other. Such interposition would establish a "bridge" between the tube and the absorbent material, like a wick carrying unwanted liquid phase to the tube.

If it is desired to produce in accordance with the invention a perforable cartridge such as that 12 illustrated in FIG. 3, it is necessary to associate the upper part of the feed tube 6 with the bottom 13a of a bowl 13 whose free edges are welded or associated in any other sealed manner with the underside of the convex top 12a of the cartridge 12 , opposite the perforation area 12b. In this case, the upper part of the tube 6 must pass through the bottom 13a of the bowl 13 in a leaktight manner, so that its central channel 6b opens into this bowl.

• a) des matières fibreuses végétales, telles que coton cardé, déchets de coton, fibres de cellulose ; parmi ces dernieres, différentes sortes de pâte à papier, dénommés par les praticiens de cette industrie, respectivement pâte mécanique, pâte kraft écrue de résineux, pâte kraft blanchie de feuilles, pâte blanchie au bisulfite de résineux, pâte kraft blanchie de résineux, pâte blanchie, qualité dite fluff ;
• b) des mousses plastiques à base de po- lyuréthane, et plus particulièrement des mousses polyéthers ou polyesters, à cellules ouvertes ou non, avec différentes porosités.

As regards the absorbent material, various materials have been tested and retained according to the invention:

• a) vegetable fibrous materials, such as than carded cotton, cotton waste, cellulose fibers; among these latter, different kinds of paper pulp, called by the practitioners of this industry, respectively mechanical pulp, unbleached kraft softwood pulp, bleached kraft pulp of leaves, bleached softwood bisulphite pulp, bleached softwood kraft pulp, bleached pulp , so-called fluff quality;
• b) plastic foams based on polyurethane, and more particularly polyether or polyester foams, with open cells or not, with different porosities.

• 1) Le tampon du matériau absorbant a une forme et des dimensions telles qu'il occupe pratiquement tout le volume interne du récipient..
• 2) On met sous vide la cartouche, jusqu'à obtenir une pression interne de 10 à 20 mm de mercure.
• 3) Une charge M est introduite en phase liquide dans chaque cartouche.
• 4) Chaque cartouche est ensuite équipée d'un dispositif de prélèvement, pourvu d'un robinet et d'un injecteur calibré pour délivrer un débit massique constant (par exemple 50g de butane par heure) à la température de l'expérience.
• 5) La cartouche ainsi équipée est disposée dans un bain d'eau thermostaté à 50°C pendant 30 minutes.
• 6) La cartouche est extraite du bain thermostaté et disposée dans une ambiance à 22°C, et on ouvre le robinet en disposant la cartouche dans différentes positions, tête en haut, couchée et horizontale, et tête en bas ; le débit de butane est évacué dans l'atmosphère, sans combustion.
• 7) On note le temps à partir duquel il y a apparition de phase liquide ; si ce temps est inférieur à 1 mn, on replace la cartouche équipée du dispositif de prélèvement dans le bain thermostaté pendant 10 mn, puis on recommance selon 6) ; au-delà d'une minute, on considère que la charge introduite ne conduit pas à l'apparition de phase liquide, car selon les expériences effectuées, au-delà de ce temps, il n'apparaît plus généralement de phase liquide.
• 8) L'apparition de phase liquide peut être matérialisée en disposant à la sortie de l'injecteur une feuille de papier kraft, à 1 cm, laquelle va se teinter dès l'apparition de. gouttelettes ou de brouillard.
• 9) dès que l'absence de phase liquide est constatée selon les étapes précédentes, on note la charge M résiduelle de butane, contenue dans la cartouche, mesurée par pesée.

For various cartridges, with different shapes or dimensions, the absorption rate of commercial butane, that is to say the maximum charge M, expressed in grams, which can be introduced without the appearance of a liquid phase during the sampling of the gas has been evaluated. according to the following test procedure:

• 1) The pad of absorbent material has a shape and dimensions such that it occupies practically the entire internal volume of the container.
• 2) The cartridge is placed under vacuum, until an internal pressure of 10 to 20 mm of mercury is obtained.
• 3) A charge M is introduced in the liquid phase into each cartridge.
• 4) Each cartridge is then equipped with a sampling device, provided with a tap and an injector calibrated to deliver a constant mass flow (for example 50g of butane per hour) at the temperature of the experiment.
• 5) The cartridge thus equipped is placed in a water bath thermostatically controlled at 50 ° C for 30 minutes.
• 6) The cartridge is extracted from the thermostatically controlled bath and placed in an atmosphere at 22 ° C., and the tap is opened by placing the cartridge in different positions, head up, lying down and horizontal, and head down; the butane flow is discharged into the atmosphere, without combustion.
• 7) The time from which the liquid phase appears is noted; if this time is less than 1 minute, the cartridge fitted with the sampling device is replaced in the thermostatically controlled bath for 10 minutes, then restarted according to 6); beyond one minute, it is considered that the charge introduced does not lead to the appearance of liquid phase, because according to the experiments carried out, beyond this time, it does not generally appear any more liquid phase.
• 8) The appearance of liquid phase can be materialized by placing at the outlet of the injector a sheet of kraft paper, at 1 cm, which will tint when the appearance of. droplets or mist.
• 9) as soon as the absence of a liquid phase is noted according to the preceding steps, the residual charge M of butane, contained in the cartridge, is noted, measured by weighing.

For different fibrous supports based on cellulose, of the paper pulp type, placed in various valve cartridges according to FIG. 1, and for commercial butane, the results shown in the table below are obtained; m, is the theoretical maximum butane load evaluated as indicated in the preamble to this description, taking into account the volume of the recess.

If we compare the results of test No. 6 with the values given in the preamble to this description, we see that the theoretical absorption capacity of the pad of absorbent material is approached, by filling the cartridge to 92 % of its capacity without jamming. This performance obtained according to the invention is advantageous, insofar as the stuffing only ultimately causes a limited volume to be lost for the storage of the liquid phase.

In order to mass produce cartridges according to FIG. 1, a process illustrated schematically in FIG. 3.

Starting from a roll of raw material in the form of a sheet of fibers 14, this sheet is passed through a defibrator 15 from which a centrifugal fan 16 sends the separated fibers into a hopper 17 in which said fibers are separated from air. Another fan 18 draws air into the defibrator 15 and into the hopper 17 and rejects it outside after it has passed through a filtration device 19.

The fibers arranged in the hopper 17 fall into a metering chimney 20 supplying an archimedean screw 21. The latter by rotation compresses the fibers in the bodies 2 placed axially successively at the outlet of this screw. It is expected to have a central mandrel not shown in each body 2 so that the fibers are arranged in a ring around this mandrel which allows the formation of the recess 9a and the establishment of the perforated chimney 7 in this recess.

Claims (14)

1. Container (1, 12) intended to contain at least one liquid gas, both in liquid and gaseous form, comprising at least one body (2), a pad - (9) of absorbent material contained by said body,. which comprises at least one elongated recess - (9a) along a dimension (for example the height) of the container, a gas sampling zone in gaseous form being provided in relation to one end of the recess, characterized in that a feed tube (6) disposed in the recess - (9a), has a free end located in said recess, without contact with the pad (9), and communicates by its other end, in a sealed manner relative to the inside the container, with a sampling device (3) only in the gas phase, located in said sampling zone. 2. Container according to claim 1, characterized in that a perforated chimney (7) is disposed in the recess (9a), and thus forms an internal facing of the latter. 3. Container according to claim 1, characterized in that a space is provided between the pad (9). and the upper wall (3, 12a) of said container (1, 12), as well as a gap between the tube (6) and the recess (9g), in communication with said space. 4. Container according to claim 1, characterized in that two partitions (6d, 6 e) oriented transversely relative to the main dimension of the recess (9a), define with the wall of the latter a racking rack (22) in which is included the free end (6a) of the supply tube (6). 5. Container according to claim 4, characterized in that at least one of the spacer-shaped partitions between the wall of the recess and the supply tube, preserving the free end of the latter from any contact with · the absorbent pad. 6. Container according to claim 4, characterized in that the partition (6d) provided at the free end of the supply tube closes the latter, said tube comprising at least one withdrawal orifice (6f), s' extending between the two partitions. 7. Container according to claims 5 or 6, characterized in that the supply tube is formed by a hollow monobloc piece closed at one end - (6c) and comprising two external annular ribs, forming the partitions. 8. Container according to claim 1, containing at least the liquid gas, for example a liquefied petroleum gas, characterized in that the volume of said gas in liquid form, contained in the available volume of the container (useful volume minus actual volume of the material absorbent pad), corresponding to a liquid-gas interface flush with or located below the free end (6a) of the supply tube (6), regardless of the position of said container in space. 9. Container according to claim 1, characterized in that the feed tube (6) and the recess (9a) extend along the height, and the free end (6a) of the feed tube (6 ) opens into an interval between the sampling device (5) and the middle of the recess (9a) and preferably at the median level of said obviously. 10. Container according to claim 1, of the refillable type, characterized in that the withdrawal device (5) consists of a tap or valve, the inlet of which communicates in leaktight manner with the other end of the supply tube (6 ). 11. Container according to claim 1, of the disposable type, characterized in that it comprises a closing element (3) attached to the body after filling. 12. Container according to claim 11, of the aerosol generator type, characterized in that a valve (5) is disposed in the closing element - (3), the inlet of which communicates in leaktight manner with the other end of the feed tube (6). 13. A container of the disposable type and constituting a cartridge capable of being perforated, according to any one of claims 1 to 9, characterized in that a bowl (13) is attached to the wall (12a) of the container (12), facing the perforation zone - (12Q) for sampling the gas in gaseous form, the bowl (13) communicating in leaktight manner with the other end of the supply tube (6). 14. Apparatus using a liquid gas such as a liquefied petroleum gas, incorporating a refillable tank, having the form of a container according to any one of claims 1 to 10.

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