EP2666519A2 - Extinguisher with tanks for additives - Google Patents

Abstract

The extinguisher has a canister containing extinguisher product e.g. water, and two reservoirs (5a, 5b) for containing additive product e.g. biocide. A releasing unit releases the additive product from one of the reservoirs and mixes the additive product to the extinguisher product. The reservoirs are detached with respect to the extinguisher, where the reservoirs are arranged at an interior of the canister. The reservoir is arranged at an interior of a compressed gas cartridge (20). An extinguisher product evacuation tube is connected to the reservoirs that are disjointed.

Description

Technical area

The invention relates to the field of fire extinguishers. More particularly, the invention relates to an extinguisher comprising a cylinder adapted to contain a fire extinguisher, means for releasing the extinguishing product from the cylinder and comprising at least one compressed gas cartridge, at least two tanks each capable of containing at least one additive product, and means for releasing the at least one additive product from the at least two reservoirs and for mixing it with the extinguishing product during the release of the extinguishing product. The invention also relates to fire extinguisher cartridges and the use of such cartridges.

Description of the state of the art

Different types of extinguishers exist on the market. They can be classified according to the type of extinguishing product they use: water extinguisher, foam, powder or gas (carbon dioxide). The use of one type of extinguisher over another depends essentially on the burning material. Water extinguishers are used for class A fires, foam and gas fire extinguishers for class A or B fires. Powder fire extinguishers can be used for class A and B, AB and C, or D. The formulations present in the fire extinguisher also vary depending on the type of fire extinguisher.

Known extinguishers comprise a reservoir, for example a cartridge, containing all the additive products. This one is usually arranged inside the bottle.

We know by the patent EP 0 461 020 a water extinguisher with a cartridge for extinguishing additives. This patent describes a cartridge containing additives suitable for improving the extinguishing properties of water and comprising an oblong tubular body, rigid, with an open end, this end being closed by a cover designed to tear under a determined external pressure less than the maximum pressure undergone by the water after liberation of the propellant gas. The cartridge includes a compartment containing the additives.

More recently, fire extinguishers containing several additive chambers have been described. Thus, we know by FR 2,722,416 an extinguisher comprising a percussion head and a protective tube in which is arranged a gas capsule and two additive receiving chambers permanently attached to the protection tube. The additive receiving chambers are not accessible independently by the user. We also know by EP 1 935 458 a fire extinguisher consisting of two outer tanks attached to the body of the fire extinguisher cylinder. This configuration requires the use of numerous connectors to connect the additive compartments, the compressed gas cartridge and the interior of the cylinder.

Additive cartridges in fire extinguishers have an expiry date. In the majority of cases, they have not been used before this expiry date and must therefore be changed. The unused cartridges are burned without establishing a recycling scheme or specific treatment of the additives present in said cartridge. However, some of said additives are polluting or dangerous for the environment. The recycling of these known cartridges, or their contents, is not easy considering their configuration or their location vis-à-vis the bottle extinguisher. The change of these cartridges can therefore be dangerous and expensive. There is a need for an extinguisher for better recycling of the cartridges containing the additives.

The invention proposes to overcome the disadvantages mentioned above while retaining the advantages of known cartridges.

Summary of the invention

According to a first aspect, the present invention provides an extinguisher comprising at least two tanks each capable of containing at least one additive product and means for releasing the at least one additive product from each of the at least two tanks, and characterized in that at least one of the tanks is removable from the fire extinguisher. The term "at least one "tank" is considered to include, in particular, the terms "one or more tanks" and "a plurality of tanks". Preferably, said at least two tanks are removable relative to the fire extinguisher. The term "removable from fire extinguisher" means that the tanks may be detached or removed from the fire extinguisher to form a separate, separate or disjointed element from the fire extinguisher. The term "at least two tanks" is considered to include, in particular, the terms "two or more tanks" and "a plurality of tanks". The presence of several reservoirs each able to contain one or more additives makes it possible to partition the additives in the different reservoirs. Thus, the different tanks can be filled according to the subsequent purpose sought from a point of view of the recycling or treatment of said additives. For example, one or more additives classified as highly polluting for the environment and which can be treated or recycled separately according to the same procedure may be placed inside a first reservoir. A second tank may for example contain one or more non-polluting additives and not requiring treatment or recycling. The additives in the different tanks can also be separated according to their chemical structure, for example separating the fluorinated additives and the non-fluorinated additives, or separating the long-chain hydrocarbons from the shorter-chain hydrocarbons. The presence of tanks having a removable relative to the fire extinguisher makes it possible to extract or remove the tank or tanks from the extinguisher and to treat them individually according to a precise recycling scheme. The tanks containing the additive products can thus be directly accessible to the user responsible for controlling the proper functioning of the fire extinguisher.

Preferably, the at least two reservoirs are disposed inside the cylinder. The arrangement of the tanks inside the cylinder facilitates their use in several types of fire extinguisher. This embodiment avoids the use of complex connection between the tank and the extinguishant product.

Preferably, said at least two tanks are disjoint. Thus, tanks can be treated or recycled independently one of the other. For example, if one of the tanks contains an additive product with an expiry date that is shorter than that of the additive product contained in the second tank, only the tank with expired contents may be removed from the fire extinguisher.

Alternatively, the at least two tanks are provided with means to be interconnected by their end or by their side wall. Thus, the tanks can be interconnected and grouped in a small space of the fire extinguisher. The mixture between the additives and the extinguishing product will be more homogeneous. In addition, this embodiment will facilitate the gripping of all the tanks and their subsequent separation.

According to yet another alternative, at least one of the tanks has a side wall connected to another tank, preferably to the side wall of another tank, more preferably at least one of the tanks has a side wall at least partly common with a side wall of another tank.

According to a second aspect, the invention relates to an extinguisher cartridge, said cartridge comprising a plurality of reservoirs, said reservoirs comprising one or more additives capable of improving the properties of the extinguishing product. Preferably, at least one of the tanks is removable relative to the cartridge. The term "removable relative to the cartridge" means that the reservoir can be detached or removed from the cartridge to form a separate, separate or disjoint element of said cartridge. Alternatively, said tanks are fixed relative to the cartridge. Thus said tanks may have a side wall or upper at least partly common to that of the cartridge. This alternative configuration also makes it possible to provide separate tanks whose lower opening is accessible directly to a user wishing to remove or modify the contents of the tanks or to fill them with a solution of freshly prepared additive products.

According to a third aspect, the invention relates to the use of said cartridge in a fire extinguisher.

These aspects as well as other aspects of the invention will be clarified in the detailed description of particular embodiments of the invention, reference being made to the drawings of the following figures.

Brief description of the drawings

The Fig. 1a-cr schematically represent transverse sections of extinguishers according to particular modes of configuration of the present invention.

The Fig. 2 is a schematic view of a reservoir according to an embodiment of the present invention.

The Fig. 3 represents a schematic view of two tanks assembled with each other according to an embodiment of the present invention.

The Fig. 4 is a schematic view of a cartridge comprising two reservoirs according to a particular embodiment of the present invention.

The Fig. 5 is a schematic view of a cartridge comprising four tanks according to a particular embodiment of the present invention.

The Fig. 6 is a schematic view of a cartridge comprising two reservoirs according to a particular embodiment of the present invention.

Detailed description of the invention

According to a first aspect, the present invention relates to a fire extinguisher. The D.1a schematically shows a cross section of an embodiment of a fire extinguisher according to the present invention. The fire extinguisher 1 comprises a cylinder 2 which can be filled with an extinguishing product such as, for example, water. The extinguisher 1 also includes means for releasing the extinguishant product out of the cylinder. Thus the cylinder is surmounted by an ejection head 3 connected to a tube 6 immersed in the cylinder 2. A container of compressed propellant gas 4 is connected to the ejection head 3. The fire extinguisher also comprises two tanks according to the invention. 'invention 5a and 5b arranged inside the cylinder 2. The two tanks are able to contain one or more additives to improve the extinguishing agent extinguishing properties. Both tanks are removable from the fire extinguisher. The two tanks are disjoint. These can be maintained by fastening means (not shown on the Fig. 1a ), for example by means of a hook, to the cylinder 2 or to another element of the fire extinguisher. The two tanks can also be movable relative to the cylinder 2. Indeed, the two tanks can move inside the cylinder 2. The fastening means stabilizes the tank inside the cylinder 2 all by promoting its subsequent extraction. When the bottle is filled with the extinguishant product, at least the lower part of the tanks 5a and 5b is immersed in the extinguishing product. To use the extinguisher 1, the user must actuate the ejection head 3 of the fire extinguisher 1 to allow the release of the propellant inside the cylinder 2. Under the effect of the differential pressure, means allow the release of the at least one additive product from the first tank 5a and the at least one additive product of the second tank 5b. The additive products are thus mixed with the extinguishing product. This mixture is then ejected by the tube 6 to the ejection head 3. If the fire extinguisher is not used, the two tanks 5a and 5b can be easily extracted from the cylinder 2, and thus the fire extinguisher, for be replaced by new tanks containing for example a new formulation. The contents of a tank 5a can also be extracted by the user and replaced by a freshly prepared solution. The removable nature of the two tanks allows the easy recycling of these and their contents. This embodiment of the invention also makes it easy to adapt existing fire extinguishers and does not require the replacement or modification of the connectors of extinguishing fire extinguishers.

The means allowing the release of the at least one additive from the first tank 5a and the second tank 5b may for example be sealing means arranged on the corresponding tanks which, under a predetermined differential pressure, allow the release of the additives. The differential pressure is usually between 0.2 MPa and 0.8 MPa, preferably between 0.3 MPa and 0.5 MPa. Thus, said sealing means may independently be a cap capable of breaking or a valve capable of opening at a differential pressure of between 0.2 MPa and 0.8 MPa, preferably between 0.3 MPa and 0, 5 MPa.

Said at least two tanks 5a, 5b can be disposed outside and / or inside the cylinder 2 of said extinguisher 1. The Fig. 1 b represents a cross section of a fire extinguisher according to another particular embodiment of the present invention in which two tanks 5a, 5b are arranged outside the cylinder 2. A discharge pipe extinguishing product 8 is connected to the tanks 5a and 5b assembled with each other. The Fig. 1 C represents a cross section of a fire extinguisher according to another particular embodiment of the present invention in which a tank 5c is connected to the discharge pipe 8 of the ejection head 3, and two tanks 5a and 5b are arranged at the inside the cylinder 2. The number of tanks or the arrangement of them in the Fig1A-c is not limiting. Those skilled in the art will understand that other configurations of the fire extinguisher are conceivable. Preferably, at least one of the tanks 5 is disposed inside the cylinder 2. More preferably, said at least two tanks 5 are arranged inside the cylinder 2.

According to a preferred embodiment, said at least two reservoirs 5a and 5b are provided with means for being connected together removably. This may, for example, facilitate their arrangement inside the cylinder 2. Said means may for example be a thread, a tapping, a male-female notch system or a clip. The Fig. 2 is a schematic view of a reservoir 5 according to this preferred embodiment of the present invention. This comprises an upper part 9, a side wall 10 and a lower part 11. The lower part 11 of the tank 5 comprises a lower opening 30. The lower part 11 of the tank has a fastening means 12 for connecting said tank 5 to another tank. Said fastening means is a tapping 14. The upper part 9 of the tank comprises a thread 13. Thus, the tapping 14 makes it possible to assemble the tank 5 with a second tank having a thread on its upper part. Said at least two tanks may also be interconnected by their end or their side wall. The term "end" means the upper part and the lower part of a tank. Thus the bottom wall of a first tank can be connected to the upper part of a second tank. The lower part of the second tank or the upper part of the first tank can be connected respectively to the upper or lower part of a third tank. When tanks are superimposed, the lower part 11 of a single tank can be immersed in the fire extinguishant. The Fig. 3 is a schematic view of two tanks 5a and 5b joined together by their side wall 10 through a fastening means represented by a male-female notch system 12a, 12b. Indeed, each tank comprises a male notch 12a and a female notch 12b for assembling the two tanks. The notches can be located indifferently over the entire surface of the side wall. This embodiment also has the advantage of allowing the additives to be released simultaneously and not sequentially in the extinguishing product. The tanks 5a and 5b may optionally comprise a second fixing means on their upper and / or lower part, for example a thread allowing the assembly of other tanks above and / or below them.

Said tanks are provided with a lower sealing means and a higher sealing means. As represented in Fig. 3 , the tanks 5a, 5b have a sealing means 15a, 15b on their lower part and a sealing means 16a, 16b on their upper part. The lower sealing means 15a, 15b can be adapted to close the lower opening 30 of the tank 5. Said lower sealing means 15a, 15b are for example caps. These may be aluminum, polyethylene or any other polymer capable of forming a polymeric film that can rupture under a differential pressure of, for example, between 0.2 MPa and 0.8 MPa, preferably between 0.3 MPa and 0. , 5MPa to allow the release of additive products. Said lower sealing means can be configured to allow for the replacement of the additive products of the tank 5. For example, in the case of lids, the user can remove the lid, change the solution of the additive products and then deposit a new cap to close the lower opening 30 of the tank 5 In the particular embodiment of the figure 3 , the upper sealing means 16a and 16b are not configured to break below the aforesaid differential pressure range. Said upper sealing means 16a, 16b may be made of the same material as the side wall of said tank, such as for example high-density polyethylene (HDPE) recycled or not. Alternatively, said lower and upper sealing means 15, 16 may be configured to allow the release of additive products.

The sealing means may be adapted according to the assembly of said tanks. When these are stacked one above the other, the tank located above may contain an upper sealing means configured to not allow the release of additive products in contrast to the lower sealing means of said tank located above and other sealing means of the other tanks. Alternatively, when the tanks are assembled by their side wall, only the lower sealing means is configured to allow the release of the additive products.

According to a preferred embodiment, at least one reservoir is disposed inside a cartridge 20 and thus forming at least one separate compartment inside said cartridge 20. This embodiment has the advantage of reusing later said cartridge, the walls of which have not been contaminated by the additives. Said cartridge 20 comprises a side wall 22, an upper part 21 and a lower part 23. The lower part 23 of the cartridge 20 is the one that is in contact with the liquid of the bottle 2 of the extinguisher 1 or that connected to the pipe exhaust pipe 8 of the fire extinguisher 1. Said at least one tank 5 is removable relative to the cartridge 20. Preferably, at least two tanks 5a, 5b are disposed inside said cartridge 20 thus forming a plurality of compartments inside of it. Each tank can thus be arranged independently of others. Preferably, said at least two tanks are removable relative to the cartridge 20. The lower opening 30 of each tank can be accessed directly. Thus, a user can easily remove or change the additive product contained in the tank 5.

The Fig. 6 is a schematic view of a cartridge 20 comprising two reservoirs 5a and 5b. The tanks 5a and 5b are removable relative to the cartridge 20. In addition, the tanks 5a and 5b can be movable with respect to the cartridge 20. These are preferably locked inside the cartridge 20 by the cartridge 20. intermediate blocking means 25 placed for example on the lower portion 23 of said cartridge 20. The reservoir blocking means 5a is not shown. A modification of the positioning of said blocking means 25 makes it possible to remove the tanks 5a and 5b. The withdrawal of a reservoir is independent of the withdrawal of the other reservoir present in the cartridge. Subsequent treatment of the tank is thus facilitated.

According to a preferred embodiment of the invention, at least one of the tanks 5 disposed inside the cartridge 20 has a wall at least partly common with a wall of said cartridge 20. Preferably, said at least one of the reservoirs 5 and said cartridge 20 have their side wall or upper at least partly common. In particular, said at least one of the tanks 5 and said cartridge 20 have their upper part and their side wall at least partly common.

Preferably, at least a portion of the side wall of a first reservoir 5a disposed within the cartridge 20 is common with the side wall of a second reservoir 5b disposed within the cartridge 20. A means separation is thus formed between said first and second tanks by the common part of their side wall. When the fire extinguisher comprises at least two tanks 5 inside the cartridge 20, said at least two tanks 5 may have a side wall at least partly common with that of said cartridge 20 and at least partly in common with a wall at least one other tank 5 present in the cartridge 20. Preferably, each tank 5 disposed inside the cartridge 20 has a side wall partly common with that of said cartridge 20 and partly common with a side wall of at least one other tank disposed within the cartridge 20. In this case, the lower opening 30 of each tank 5 can be accessed directly. In addition, when using the extinguisher, the mixture between the additive products of each tank and the extinguishing product will be simultaneous.

According to a preferred embodiment, said cartridge 20 is provided with a lower sealing means 27 disposed on its lower part 23. Said lower sealing means 27 of said cartridge may be partly or entirely common with said closure means lower seal of at least one tank or plurality of tanks. Preferably, said lower sealing means 27 of said cartridge 20 is common with said lower sealing means of the plurality of reservoirs 5 disposed within the cartridge. Thus, said lower sealing means 27 is a means for closing at least one tank 5 or the plurality of tanks 5. Said lower sealing means of the cartridge 20 and the tanks 5 may be a lid as described previously. The upper sealing means 28 of the cartridge 20 is configured not to allow the release of the additive products.

The extinguishing products currently used are compositions of several derivatives which may comprise, in particular, floating film forming agents (AFFF). The global production of AFFF represents several million tons annually. AFFFs make it possible to form a film limiting the contact between the fuel and the oxygen. These floating film-forming agents may contain hydrocarbon surfactants (ionic, nonionic or amphoteric), fluorinated or perfluorinated surfactants, glycol ether derivatives, and optionally other additives, for example biocides, anti-corrosive agents, or rheology agents. The degradation of the derivatives is variable over time and strongly depends on their chemical structure. The degradation of a single derivative of the composition requires the complete destruction of the latter. It is therefore important to be able to separate the different components of the composition to avoid degradation. systematic of the entire composition. Hydrocarbon surfactants may, for example, have a higher rate of degradation than other derivatives forming part of the composition. Moreover, fluorinated surfactants have a relatively harmful ecological impact given their low bioassimilation and their persistence in groundwater. The separation of this type of compounds from the rest of the composition can therefore represent an economic advantage by reducing the costs associated with the preparation of the extinguishing product. Indeed, stable derivatives could be isolated from products with low stability and thus be directed to a proper recycling pathway. Thus, according to a preferred embodiment, at least one of the reservoirs is capable of containing or contains a floating film forming agent (AFFF) composition. Preferably, at least one of the reservoirs is capable of containing or contains one or more fluorinated or perfluorinated surfactant (s).

Preferably, the extinguisher is a water or foam extinguisher.

According to a second aspect, the invention relates to a cartridge extinguisher 1 characterized in that it comprises a plurality of reservoirs 5, said reservoirs 5 each being capable of containing one or more additives capable of improving the properties of an extinguishing product . Preferably, the cartridge is located inside the cylinder 2. The cartridge 20 may be movable relative to the extinguisher or removable relative thereto.

According to one embodiment of the invention, at least one of said reservoirs 5 is removable relative to the cartridge 20. The cartridge 20 may be provided with a means 25 for blocking at least one reservoir of said plurality of reservoirs 5 to block said at least one reservoir within the cartridge 20. The cartridge 20 may contain at least two removable reservoirs relative thereto. Said at least two tanks can be connected together removably. Cartridge 20 is also described in detail above with reference to Fig. 2-3 and 6 .

According to a preferred embodiment, at least one of said reservoirs 5 is fixed with respect to the cartridge 20. Thus, it may comprise a wall at least partly common to that of the cartridge 20. At least one of said reservoirs 5 may have a wall at least partly common with a wall of another tank disposed in the cartridge 20. In particular, at least one of said tanks 5 may have a side wall at least partly common with a side wall of another tank disposed in the cartridge 20. The lower opening 30 of said at least tank 5 can be accessed directly. For example, when renewing the cartridge, if it contains several mobile or removable tanks, the user can remove if necessary mobile or removable tanks and have direct access to the lower opening of the fixed tank and therefore to the contents of it. If the cartridge 20 contains several fixed reservoirs, these can be juxtaposed or partially superimposed to maintain direct access to the lower opening 30.

According to another embodiment of the invention, the cartridge 20 contains a plurality of reservoirs 5 of which at least one of the reservoirs has a side wall at least partly common with a side wall of at least one other reservoir 5 disposed in the cartridge 20. The cartridge 20 may also contain at least two tanks having a side wall at least partly common with a side wall of another tank disposed inside the cartridge 20. In addition, said at least one of the tanks 5 may have a wall at least partly common with a wall of the cartridge 20. Preferably, at least two of the reservoirs 5 have a wall common to that of the cartridge 20. At least a part of the side wall or top of the one of the tanks 5 may be partly common with a side wall or top of said cartridge 20. In particular, at least one of the tanks 5a, 5b has a side wall at least partly common with a e side wall of the cartridge 20 and at least partly common with a side wall of at least one other reservoir 5 disposed inside the cartridge 20.

According to a preferred embodiment, each reservoir 5 disposed inside the cartridge 20 has a side wall at least partly in common with a side wall of at least one other reservoir disposed inside the cartridge 20. Each reservoir 5 disposed inside the cartridge 20 may also have a side wall at least partly common with a side wall of said cartridge 20.

In addition, the Fig. 4 is a schematic view of a cartridge 20 comprising two reservoirs according to a particular embodiment of the present invention. The cartridge 20 comprises an upper portion 21, a side wall 22 and a lower portion 23. The cartridge 20 comprises two reservoirs 5a and 5b. The side walls and the lower part of the tanks 5a and 5b are respectively partly in common with the side wall 22 and the lower part 23 of the cartridge 20. In addition, the side wall of the tank 5a is partly in common with the side wall of the tank. tank 5b and thus forms a means of separation 24 between the two tanks. The separation means 24 is a polymer membrane. The membrane may consist of HDPE recycled or not, or any other material ensuring the tightness of the tanks between them and do not interact with the additives. This embodiment of the cartridge can be easily prepared by extrusion or injection, limiting production costs. In addition, this embodiment allows a parallel or simultaneous release of the additives contained in the tanks. The upper portion 21 of the cartridge 20 may be surmounted by a gripping ring. This can be replaced by any other means likely to allow gripping of the cartridge.

Another embodiment of the cartridge 20 according to the invention is detailed in the Fig. 5 . This represents a schematic view of a cartridge 20 comprising four tanks 5a-d having a side wall at least partly common with the side wall 22 of said cartridge 20 and at least partly common with the side wall of at least another reservoir 5 disposed inside the cartridge 20. Thus, the reservoir 5a has its side wall partly in common with that of the cartridge 20 and partly common with that of the reservoir 5b and 5d. The four tanks are separated from each other by the separation means 24a and 24b. Said lower sealing means 27 of said cartridge 20 is common with said lower sealing means 15 of the plurality of reservoirs 5 disposed within the cartridge. Preferably, said lower sealing means is a cap as described above.

As discussed previously, the separation of the constituents of extinguisher product can be judicious. Thus, said cartridge 20 can be used to separate the compounds contained in the extinguishing product. According to a preferred embodiment, at least one of the tanks 5 of the cartridge 20 is able to contain or contains a composition of floating film forming agents (AFFF). Preferably, at least one of the reservoirs 5 is capable of containing or contains one or more fluorinated or perfluorinated surfactant (s).

According to a third aspect, the invention relates to the use of one or more cartridge (s) according to the invention in a fire extinguisher. The cartridge (s) can be placed inside the cylinder 2 of the fire extinguisher 1 and / or on the ejection head 3 of the fire extinguisher 1. When the cartridge 20 is placed in the bottle 2 of the extinguisher 1, the lower part 23 of said cartridge 20 is immersed in the extinguishing product filling said cylinder 2. When the cartridge 20 is placed on the ejection head 3 of the fire extinguisher 1 , the lower part 23 of said cartridge is connected with the ejection pipe 8 of the fire extinguisher. Preferably, the extinguisher may be a water or foam extinguisher. One or more cartridges may also be used to distribute in the plurality of tanks 5a, 5b of said cartridge 20, one or more additives to improve the properties of a fire extinguishant.

The present invention has been described in relation to specific embodiments, which have a purely illustrative value and should not be considered as limiting. In general, it will be apparent to those skilled in the art that the present invention is not limited to the examples illustrated and / or described above. The invention includes each of the novel features as well as all their combinations. The presence of reference numbers in the drawings can not be considered as limiting, even when these numbers are indicated in the claims. The use of the verbs "to understand", "to include", "to include", or any other variant, as well as their conjugations, can in no way exclude the presence of elements other than those mentioned. The use of the indefinite article "a", "an", or the definite article "the", "the" or "the", to introduce an element does not exclude the presence of a plurality of these elements.

In summary, the invention may also be described as follows: a fire extinguisher 1 comprising a cylinder 2 capable of containing an extinguishing product, and means for releasing the extinguishing product from the cylinder and comprising at least one compressed gas cartridge, at at least two tanks 5a, 5b each able to contain at least one additive product, means for releasing the at least one additive product from each of the at least two tanks 5a, 5b and to mix them with the extinguishing product during the release of the product extinguisher, and characterized in that at least one of the tanks 5a, 5b is removable relative to the fire extinguisher 1.

Claims (2)

An extinguisher cartridge (20) comprising a plurality of reservoirs (5a, 5b), said reservoirs (5a, 5b) being each adapted to contain one or more additives for improving the properties of an extinguishing product, characterized in that that at least one of the reservoirs (5a, 5b) has a side wall at least partly common with a side wall of at least one further tank (5) disposed within the cartridge (20) and at least partially common with a side wall of the cartridge (20). Use of one or more cartridge (s) according to claim 1 in a fire extinguisher or to distribute in the plurality of tanks (5a, 5b) of said cartridge (20), one or more additives to improve the properties of a product extinguisher.

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