DEVICE FOR FILTERING OF LIQUID AND FILLING FOR A HOUSEHOLD ELECTRICAL APPLIANCE

Abstract

A device for filtering of liquid and filling for a household electrical appliance including a main filtering device which is designed to filter a liquid; a main body including: a main tank having a pressing area that is deformable under the manual pressure by a user; a duct for emptying the main tank, the emptying duct designed to convey the filtered liquid from the main tank to a tank of a household electrical appliance when the deformable pressing area is deformed by the user. The main tank is situated downstream from the main filtering device, such as to receive and store the liquid filtered by said main filtering device.

Claims

1. A device for filtering of water and filling for a household electrical appliance comprising: a main filtering device configured to demineralize the water; a main body comprising: a main tank comprising a pressing area which is deformable under the manual pressure by a user; a duct for emptying the main tank, said emptying duct configured to convey the demineralized water from the main tank to a tank of a household electrical appliance when the deformable pressing area is deformed by the user, wherein the main tank is situated downstream from the main filtering device, such as to receive and store the water demineralized by said main filtering device.

2. The device for filtering of liquid and filling for a household electrical appliance as claimed in claim 1, wherein the main filtering device comprises a holding space upstream from the main tank to permit storage of the liquid to be filtered.

3. The device for filtering of liquid and filling for a household electrical appliance as claimed in claim 1, wherein the emptying duct is positioned on the exterior of the main tank.

4. The device for filtering of liquid and filling for a household electrical appliance as claimed in claim 3, wherein the emptying duct is fastened longitudinally on the main tank by means of a fastening area.

5. The device for filtering of liquid and filling for a household electrical appliance as claimed in claim 4, wherein the device for filtering and filling comprises a recess between the emptying duct and the deformable pressing area to limit the deformation of the emptying duct when the deformable pressing area is deformed by the user.

6. The device for filtering of liquid and filling for a household electrical appliance as claimed in claim 5, wherein the main tank extends between a proximal end forming a support surface for the main tank and a distal end opposite, the recess extending from the distal end to the fastening area.

7. The device for filtering of liquid and filling for a household electrical appliance as claimed in claim 1, wherein the main tank extends between a proximal end forming a support surface for the main tank and a distal end opposite, the main tank comprising an area that assists the deformation at the distal end.

8. The device for filtering of liquid and filling for a household electrical appliance as claimed in claim 7, wherein the area that assists the deformation is a groove.

9. The device for filtering of liquid and filling for a household electrical appliance as claimed in claim 1, wherein the main tank extends between a proximal end forming a support surface for the main tank and a distal end opposite, wherein the main tank comprises a reinforcement area at the distal end.

10. The device for filtering of liquid and filling for a household electrical appliance as claimed in claim 9, wherein the main tank extends between a proximal end forming a support surface for the main tank and a distal end opposite, the main tank comprising an area which assists the deformation at the distal end, wherein the area of reinforcement is in contact with the area which assists the deformation.

11. The device for filtering of liquid and filling for a household electrical appliance as claimed in claim 1, wherein the main filtering device comprises an input grid that is designed to receive the liquid to be filtered, and a dissipater which is designed to distribute the liquid to be filtered over the entire surface of the input grid.

12. The device for filtering of liquid and filling for a household electrical appliance as claimed in claim 1, wherein the emptying duct comprises an emptying spout configured to come into contact with a tank for liquid of the household electrical appliance, said emptying spout comprising a filtering device.

13. The device for filtering of liquid and filling for a household electrical appliance as claimed in claim 12, wherein the emptying spout comprises a venting device which is designed to allow air to pass between said emptying spout and said tank of the household electrical appliance.

14. A household electrical appliance comprising a device for vaporization of liquid connected to a tank of liquid to be vaporized, and a device for filtering of liquid and filling as claimed in claim 1.

15. The household electrical appliance as claimed in claim 14, wherein the household electrical appliance further comprises a first arm comprising a first contact surface which is designed to come into contact with a lock of hair, and a second arm comprising a second contact surface, that is configured to heat, and to come into contact with the lock of hair, said first and second arms being articulated to one another such as to form a smoothing tong.

16. The household electrical appliance as claimed in claim 15, wherein the vaporization device and the tank of liquid to be vaporized are incorporated in said first arm and/or said second arm.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0069] FIG. 1 is a view in perspective of a device for filtering of liquid and filling according to the invention.

[0070] FIG. 2 is a view similar to FIG. 1, but from which the stopper of the device has been removed.

[0071] FIG. 3 is a view in longitudinal cross-section of the device for filtering of liquid and filling in FIG. 2.

[0072] FIG. 4 is a view in perspective and in longitudinal cross-section of the main filtering device of the device for filtering of liquid and filling in the preceding figures.

DESCRIPTION OF THE EMBODIMENTS

[0073] The embodiment of the invention illustrated by the different figures is an embodiment in which the device for filtering of liquid and filling is proposed for the filling of a hairdressing device, for example a steam smoother.

[0074] The term “liquid” thus advantageously designates water, in this case hard water, in particular running water obtained from the tap, which the device which is the subject of the invention will filter, in particular in order to remove the limestone therefrom. In fact, limestone is detrimental for the satisfactory operation of household electrical appliances, and it is advisable to use demineralized water (as opposed to hard water), or at least water containing the least possible limestone. It will be understood however that the term “liquid” is not limited to water, but can also concern other types of liquids, without departing from the context of the invention.

[0075] Thus, the capacity of said device is designed such as to be able to guarantee to the user a plurality of successive fillings of his hairdressing appliance from a single filling of the filtering device defined by the invention. In fact, this is particularly valuable for hairdressers who use the hairdressing appliance several times a day. For example, the volume of filtered liquid supplied by the device which is the subject of the invention can be calculated such as to be able to ensure several complete hairdressing sessions, for example between 3 and 10.

[0076] As can be seen in the different figures, the device for filtering of liquid and filling for a household electrical appliance comprises a main filtering device 3 which is designed to filter a liquid. In particular, the main filtering device 3 is thus designed to filter water, at least such as to decrease significantly the limestone content thereof.

[0077] “Limestone” means not only the calcium carbonate contained in the water, but also, by extension, all of the mineral salts which water can contain, and which tend to be precipitated into solid form when the water is heated, in particular at its boiling point.

[0078] Thus, the main filtering device 3 will receive hard water, i.e. unfiltered water, for example obtained from the tap, in order to supply filtered water, in particular with a limestone content which is greatly reduced, if not zero, thus approximating a demineralized water.

[0079] The main filtering device 3 comprises a filtering tank 34 which is designed to contain a filtering element 341, for example a resin, which can interact mechanically and/or chemically with the liquid to be filtered. For example, the filtering element 341 can comprise a plurality of balls, such as to create a mechanical filter to block the largest molecules in the interior of the liquid, and thus create mechanical filtering. The filtering element 341 can also comprise chemical elements which react in particular in contact with the mineral salts contained in the liquid, in this case in the hard water, such as to dissolve these salts, thus creating chemical filtering of the liquid. Devices of this type are well known as such, and will not be described further here.

[0080] The filtering device, in this case the filtering tank 34, comprises an input grid 345 and an output grid 346, through which respectively the liquid to be filtered enters and the filtered liquid exits. Said input grid 345 and output grid 346 advantageously make it possible to filter the liquid mechanically, and thus prevent coarse foreign bodies (dust, pebbles, grass, etc.) from penetrating into the interior of the filtering tank 34 and the filtering element 341. Said input grid 345 and output grid 346 also make it possible to retain the filtering element 341 in the interior of the filtering tank 34, irrespective of the orientation of the filtering tank 34.

[0081] The filtering tank 34 has a cylindrical form, and said input grid 345 and output grid 346 thus form the ends of the filtering tank 34, and therefore each have the form of disks. The main filtering device 3 comprises a holding space 31, i.e. a buffer area, such as to permit storage of the liquid to be filtered, at least temporarily. In other words, the main filtering device 3 comprises an inner tank which acts as a buffer tank, until the liquid to be filtered is filtered by the filtering element 341.

[0082] In fact, the filtering element 341 is situated downstream from the holding space 31, such that the holding space makes it possible to store the liquid to be filtered, in this case the hard water to be filtered, until the liquid flows gradually through the filtering element 341, i.e. it passes through the main filtering device 3. This allows the user not to have to calculate the speed of filling of the device which is the subject of the invention according to the speed of filtering of the main filtering device 3. On the other hand, thanks to the holding space 31, the user can fill the device rapidly and in a single go, since the surplus liquid which cannot be filtered in real time by the main filtering device 3 will be stored automatically in the holding space 31. The user can thus then position the device which is the subject of the invention on a table, and leave the device to operate by itself: as the liquid flows through the main filtering device 3, the liquid held in the holding space 31 will flow, thus supplying the filtering element 341 continually, without intervention by the user. This facilitates the use and ergonomics of the device which is the subject of the invention.

[0083] The holding space 31 has a cylindrical form, and its volume makes it possible for example to store between 50 cm.sup.3 and 500 cm.sup.3, for example approximately 144 cm.sup.3, this volume having been calculated in order to comply with the constraints of usage previously mentioned (use by hairdressers and automatic filtering).

[0084] As can be seen in FIG. 3, the holding space 31 comprises a first assembly device 314 which is designed to correspond to a first complementary assembly device 344 belonging to the filtering tank 34, making it possible to assemble the holding space 31 and the filtering tank 34.

[0085] Preferably, said first assembly device 314 and first complementary assembly device 344 comprise a screw/nut system, i.e. an assembly which can be dismantled, but they can also comprise a clipping system, i.e. an assembly which can not be dismantled. A combination of this type makes it possible to ensure good sealing and good mechanical strength between the holding space 31 and the filtering tank 34 (screw/nut system), whilst preventing the user from dismantling said assembly (clipping system), and therefore preventing the user from losing the filtering element 341 contained in the filtering tank 34. In fact this is particularly advantageous when the filtering element 341 is formed by a multitude of small balls. However, without departing from the context of the invention, it would be possible to conceive of use of an assembly which can be dismantled between the filtering tank 34 and the holding space 31, which would optionally allow the user to carry out maintenance operations only on the filtering tank 34 (cleaning of the input grid 345 and output grid 346, replacement of the filtering element 341, etc.), without having to change the holding space.

[0086] As can be seen, the main filtering device 3 comprises an input orifice 32, which is designed to receive the liquid to be filtered, and which orifice preferably has a circular form. It is thus through this input orifice 32 that the liquid to be filtered is poured by the user, in this case hard water obtained from the tap. This allows said liquid to be located in the holding space 31, then to pass through the input grid 345, and then through the filtering element 341.

[0087] As can be seen in FIGS. 2 and 3, the main filtering device 3 also comprises an assembly means 317 which is designed to correspond with a complementary assembly means 17 belonging to a main body 1. In this case, the assembly means 317 and the complementary assembly means 17 form an assembly of the bayonet type, using respectively lugs and channels, and ensuring the blocking between the main filtering device 3 and the main body 1 when a quarter of a turn is implemented between the main filtering device 3 and the main body 1.

[0088] The main filtering device 3 also comprises a dissipater 33, which is designed to distribute the liquid to be filtered over the entire surface of the input grid 345. Its function is to distribute the flow of liquid to be filtered well over the entire cross-section of the input grid 345, i.e. to use all of the filtering capacities of the main filtering device 3. This makes it possible to optimize the filtering of the liquid, to limit the filtering time by using the entire filtering capacity, and also not to always use the same portion of the filtering element 341, as could unfortunately be the case without the presence of a dissipater 33 of this type. Thus, the filtering element 341 wears uniformly, and the interval between maintenance operations is substantially increased.

[0089] The dissipater 33 has a convex form on which there is poured the liquid to be filtered, in this case water flowing from the tap. The convex form, for example a form substantially similar to an umbrella, will thus break up the trickle of liquid so as to distribute it well over the entire cross-section of the input orifice 32. In addition, a dissipater 33 of this type makes it possible to limit the height of fall of the liquid (in particular from the tap), thus protecting the filtering element 341 against any deterioration which could be caused by the pressure of the liquid.

[0090] As can be seen in FIGS. 1 to 3, the device for filtering of liquid and filling for a household electrical appliance comprises a main body 1. The main body 1 is then designed to receive and retain the main filtering device 3.

[0091] The main body 1 itself comprises a main tank 11. The expression “tank” designates any sealed container which can receive and retain liquid in its interior. The main tank 11 is substantially rigid, i.e. it has mechanical strength, and it is not limp, including when it is empty. As can be seen, the main tank 11 has a form of revolution, in this case the form of a cylinder, this form having in particular the advantage of being relatively ergonomic (a cylinder can be grasped with a hand), in particular because it is reminiscent of the form of water bottles. The main tank 11 has a diameter of approximately 87 mm for a length (or height, according to the vertical tank illustrated in the figures) of approximately 132 mm. The volume of the main tank is for example between 50 cm.sup.3 and 500 cm.sup.3, and is for example approximately 355 cm.sup.3.

[0092] As illustrated, the main tank 11 is situated downstream from the main filtering device 3, such as to receive and store the liquid filtered by said main filtering device 3. In other words, the main tank 11 is designed to contain filtered liquid, i.e. liquid flowing from the main filtering device 3. Thus, during operation of the device according to the invention, the main tank 11 receives and stores filtered liquid (such as, for example, demineralized water), and not liquid to be filtered (such as, for example, hard water). According to the direction of flow of the liquid, the main tank 11 is thus situated after the main filtering device 3, i.e. after the filtering element 341.

[0093] The main tank 11 is also situated downstream from the holding space 31. In other words, the holding space 31 is situated upstream from the main tank 11, i.e. before the main tank 11, but also before the filtering element 341, such that, in operation, the holding space 31 receives hard water, i.e. water which has not yet been filtered.

[0094] As can be seen in FIGS. 1 to 3, the main tank 11 extends between a proximal end 115 forming a support surface for placing the main tank 11 for example, and an opposite, distal end 116. In other words, the proximal end 115 of the main tank 11 is a substantially flat surface, such as to be able to act as a support surface and contact surface for the main tank 11 when this tank is placed on a work surface, such as a table for example.

[0095] In the embodiment illustrated, the proximal end 115 thus has the form of a solid disk which ensures good stability for the main tank 11, and thus for the main body 1 of the device according to the invention. In other words, the proximal end 115 constitutes the base of the main tank 11.

[0096] For its part, the distal end 116 is opposite the proximal end 115. As can be seen, the distal end 116 is in the form of a hollow disk, i.e. a crown, and thus constitutes the opening of the main tank 11.

[0097] As will be described hereinafter, the distal end 116 is designed to receive a stopper 2, such as to close the main tank 11 hermetically.

[0098] The distal end 116 is also designed to receive and retain the main filtering device 3, as can be seen in FIG. 3. In fact, the main filtering device 3 is positioned in the interior of the main tank 11. As can be seen, the input orifice 32 has a cross-section, in this case a diameter, larger than that of the main filtering device 3 as a whole. This makes it possible firstly to facilitate the filling of the holding space 31, but also to form a shoulder 316 for the main filtering device 3.

[0099] In fact, as illustrated, this shoulder 316 will be supported on the distal end 116, which makes it possible to retain the main filtering device in position in the interior of the main tank 11, and prevent the device from falling to the base of the tank under its own weight. In fact, it is important to keep a free space between the base of the main tank 11, i.e. the proximal end 115, and the base of the filtering tank 34, i.e. the output grid 346, quite simply to ensure that the filtered liquid flows well after it has passed through the filtering element 341.

[0100] The shoulder 316 also makes it possible to ensure the sealing between the main filtering device 3, more specifically the holding space 31, and the main tank 11.

[0101] The main tank 11 comprises a pressing area 111 which is deformable under manual pressure by a user. In other words, although the main tank 11 is rigid, it remains temporarily resiliently deformable, and in particular deformable by the user. This deformation makes it possible to empty the main tank 11, i.e. to extract the liquid, in this case the filtered water, which it contains. It is the user who will control the emptying of the main tank 11 directly by pressing, i.e. by exerting pressure in particular by means of his hand, on an area provided for this purpose, i.e. the deformable pressing area 111.

[0102] As can be seen, the deformable pressing area 111 is formed by the lateral walls of the cylinder formed by the main tank 11. Thus, the emptying of the main tank 11 operates according to the well-known and highly intuitive principle of a wash bottle: in order to discharge the liquid contained in the interior of the tank, it is sufficient to press on the tank such as to deform it. In fact, the deformation of the deformable pressing area 111 will decrease the internal volume of the main tank 11, and consequently the internal pressure will increase, which will expel the liquid contained in the interior of the main tank 11. The deformable pressing area 111 is a resilient area, i.e. which regains its original form after deformation of the main tank 11.

[0103] As can be seen in FIG. 3 in particular, the main tank 11 comprises an area which assists the deformation 112 at the distal end 116. Thus, the area 112 which assists the deformation is situated in the vicinity of the distal end 116, i.e. it is situated closer to the distal end 116 than to the proximal end 115.

[0104] More specifically, the area 112 which assists the deformation is a groove, and preferably a circular groove. The area 112 which assists the deformation is thus a hollow provided all around the main tank 11. The hollow formed by the groove will thus decrease the mechanical resistance of the main tank 11 locally, in particular the resistance to compression, such that this will facilitate the deformation of the deformable pressing area 111. Thus, the force required from the user in order to deform said deformable pressing area 111 is minimized. In addition, the presence of the area 112 which assists the deformation will make it possible to delimit the deformable pressing area 111, both from a mechanical point of view and also from a visual point of view, for the user, by suggesting to him the area which is easiest to deform.

[0105] As can be seen in FIG. 3, said groove has a cross-section in the form of an arc of a circle, i.e. the base of the groove is rounded. The groove preferably has a diameter of 5 mm (which corresponds to a depth of 2.5 mm). These dimensions have been determined in order to provide the best compromise between ease of deformation of the deformable pressing area 111 and general mechanical strength of the main tank 11.

[0106] The figures also show that the main tank 11 comprises a reinforcement area 113 at the distal end 116. Thus, the reinforcement area 113 is situated in the vicinity of the distal end 116, i.e. it is situated closer to the distal end 116 than to the proximal end 115. More specifically, the reinforcement area 113 is a rib, i.e. an element in relief, projecting from the wall of the main tank 11. The rib thus projects radially from the lateral wall of the main tank 11.

[0107] More specifically, the reinforcement area 113 is in contact with the area 112 which assists the deformation, which in this case is situated just above the area 112 which assists the deformation, i.e. the reinforcement area 113 is situated between the area 112 which assists the deformation and the distal end 116. Said reinforcement area 113 thus constitutes an element, the mechanical strength of which, and in particular the rigidity of which, is increased, thus making it possible to delimit well the deformable pressing area 111, and therefore stop the deformation of the main tank 11 with precision, in a location which is specific, controlled and determined in advance, when the user presses the deformable pressing area 111. In particular, this allows the distal end 116 to remain firmly rigid, i.e. not to be deformed, thus making it possible to deform the stopper 2 which it receives, and thus ensure perfect sealing. The rigidity of the distal end 116 is also primordial for ensuring the good retention, i.e. for supporting the weight, of the main filtering device 3, as previously explained.

[0108] The main body 1 also comprises a duct 12 for emptying the main tank 11. “Emptying duct” means any duct, pipe, channeling, etc., which makes it possible to transport a fluid. Said emptying duct 12 is thus designed to convey the filtered liquid from the main tank 11 to a tank of a household electrical appliance when the deformable pressing area 111 is deformed by the user.

[0109] As can be seen in the different figures, the emptying duct 12 is positioned on the exterior of the main tank 11. This makes it possible to free space in the interior of the main tank 11, and thus increase the capacity thereof. The user therefore benefits from a larger reserve of filtered liquid, which is beneficial for the aforementioned usages. The emptying duct 12 is fastened longitudinally on the main tank 11 by means of a fastening area 121, preferably by continuity of material. As can be seen in FIG. 3, the fastening area 121 thus makes it possible to connect, fasten or attach the emptying duct 12 on the lateral wall of the main tank 11. Thus, the emptying duct 12 extends parallel to the main tank 11, i.e. the emptying duct 12 extends along the main tank 11. This makes it possible to maintain a device which is relatively compact and solid in that, if it is dropped, the emptying duct 12 continues to be protected by the main tank 11.

[0110] The emptying duct 12 extends between a first end 124 which is fastened on the main tank 11 in a sealed manner, such as to receive the filtered liquid therefrom, and a free end 125 which acts as an emptying orifice, and makes it possible to fill the tank of the household electrical appliance

[0111] It will then be noted that the fastening area 121 does not extend along the entire length of the emptying duct 12. In fact, the fastening area 121 extends from the first end 124 in the direction of the free end 125 over approximately two thirds of the length of the emptying duct 12. Thus, the device for filtering and filling comprises a recess 122 between the emptying duct 12 and the deformable pressing area 111. “Recess” means a space or a gap, i.e. the emptying duct 12 is not fastened locally on the main tank 11, as can be seen in FIG. 3. This therefore makes it possible to keep the emptying duct 12 separate from the main tank 11, and in particular the deformable pressing area 111, such as to limit the deformation of the emptying duct 12 when the deformable pressing area 111 is deformed by the user. This therefore prevents the emptying duct 12, and in particular its free end 125, from moving too much during filling of the tank of the household electrical appliance, thus facilitating this operation.

[0112] As can be seen, the recess 122 extends from the distal end 116 to the fastening area 121, i.e. the recess 122 is provided in the upper part of the main body 1, if the direction in FIG. 3 is taken into consideration. For example, the recess 122 extends over a length of between 5 mm and 75 mm, and is preferably equal to 25 mm from the distal end 116. The recess 122 is preferably designed such as to leave a space which is preferably substantially equal to 1.45 mm between the emptying duct 12 and the deformable pressing area 111.

[0113] As illustrated, the emptying duct 12 comprises a bend 123 which allows the emptying duct 12 to be moved away from the main tank 11. This is important for the general ergonomics of the device. In fact, the bend 123 makes it possible to orient the free end 125 in an optimal direction for filling the tank of the household electrical appliance without having to overturn or even excessively incline the main body 1 of the device. Finally, as can be seen by consulting FIGS. 1 to 3, the emptying duct 12 is in the form of a swan-neck relative to the main body 1.

[0114] The emptying duct 12 comprises an emptying spout 13 which is designed to come into contact with a tank for liquid of the household electrical appliance. As can be seen, the emptying spout 13 is an element with a cross-section larger than the cross-section of the emptying duct 12, and is positioned at the free end 125, more specifically at least around the free end 125. The emptying spout 13 in this case has the form of a truncated cone, which makes it possible to easily insert the emptying spout 13 and thus the free end 125 in the interior of the tank to be filled of the household electrical appliance. In addition, the form of a truncated cone of the emptying spout 13 will ensure reliable sealing between the orifice of the tank to be filled of the household electrical appliance and the emptying duct 12. This will therefore facilitate filling of the tank for the user, whilst avoiding any untimely escape of liquid.

[0115] However, and this could constitute a separate invention, the sealing formed between the emptying spout 13 and the tank of the household electrical appliance can be detrimental. In fact, as explained, as the user fills the tank of his household electrical appliance, the pressure in the interior of this tank will increase, with the result that it will be increasingly difficult for the user to continue with his filling. This will in particular require the user to exert greater pressure on the deformable pressing area 111, and will also tend to eject the emptying spout 13 from the tank of the household electrical appliance, thus giving rise to a loss of liquid from the appliance. In order to avoid these disadvantages, the emptying spout 13 comprises a venting device 132, which is designed to allow air to pass between said emptying spout 13 and said tank of the household electrical appliance. The venting device 132 comprises in particular a slot, in this case two slots, which are diametrically opposite one another, extending longitudinally from the free end 125 in the direction of the bend 123. However, said slots do not extend over the entire length of the emptying spout 13, but only over a part of its length, over half of its length for example. This makes it possible to maintain the tank of the household electrical appliance to be filed at atmospheric pressure, including during its filling by the emptying spout 13. In addition, the venting device 132 allows the main tank 11 to aspirate air when the user releases the pressure on the deformable pressing area 111 via the free end 125, without having to extract this end from the tank of the household electrical appliance during filling. This aspiration of the air allows the main tank 11 to regain its initial form. It is thus possible for the user to exert new pressure on the deformable pressing area in order to eject water once more via the free end 125, and thus continue the filling of the tank of the household electrical appliance, without needing to extract the emptying spout 13 from the tank of the household electrical appliance. This allows the user to gain in terms of ergonomics and filling time by rapidly concatenating the pressure operations on the deformable pressing area in order to empty the main tank 11. Finally, the venting device 132 prevents any risk of accidental aspiration of the liquid present in the tank of the household electrical appliance, when the pressure is released on the deformable pressing area 111, i.e. when the main tank 11 regains its initial form, and therefore aspirates air as required via the free end 125.

[0116] The emptying spout 13 can also comprise a filtering device 131 as can be seen in FIG. 3. This filtering device 131 can for example comprise a strainer, and makes it possible to trap any impurities which could be in the liquid extracted from the main tank 11. In particular, the filtering device 131 is designed to trap particles from the filtering element 341 which could have escaped from the filtering tank 34. Thus, it is ensured that the liquid which is conveyed to the tank of the household electrical appliance is free from any impurities which could detract from the satisfactory operation of the appliance.

[0117] The device for filtering of liquid and filling also comprises a stopper 2 as can be seen in FIG. 1. This stopper 2 is removable, such as to be able to be fitted and dismantled as required by the user, on or off the main tank 11. For this purpose, the main tank 11 comprises a second assembly device 114 at the distal end 116, i.e. in the vicinity thereof. This second assembly device 114 is thus designed to cooperate with a second, complementary assembly device belonging to the stopper 2, such as to form an assembly which is temporary, i.e. which can be dismantled. In this case, the assembly in question is an assembly of the screw/nut type, i.e. the main tank 11 comprises a thread provided at the distal end 116, whereas the stopper 2 comprises tapping. Thus, the stopper 2 can be screwed onto the distal end 116. It is possible however to conceive of other mechanisms for assembly of the stopper 2 on the distal end 116, without departing from the context of the invention.

[0118] Once the stopper 2 has been fitted on the distal end 116 of the main tank 11, it comes into contact with the main filtering device 3. More specifically, the stopper 2 is supported on the input orifice 32 of the main filtering device 3. Thus, the shoulder 316 is wedged between the distal end 116 and the stopper 2, which ensures total immobilization of the main filtering device 3. As previously explained, the good mechanical strength of the distal end 116 is then important for ensuring satisfactory assembly of the device which is the subject of the invention.

[0119] In addition to the retention in position of the main filtering device 3 in the interior of the main tank 11, the stopper 2 contributes towards the sealing of the device according to the invention by preventing any leakage of liquid via the input orifice 32, by blocking the orifice. This is particularly useful in the case of accidental overturning of the device, in particular when the user has just filled the holding space 31.

[0120] A principle of double sealing is also ensured at the second assembly device 114 and the second complementary assembly device. In fact, a sealing element 1141, for example an O-ring seal, can be positioned at this level, between the main body 1 and the stopper, such as to seal the assembly formed by the second assembly device 114 and the second complementary assembly device. This makes it possible to double the sealing, and thus to limit any risk of leakage of liquid, including in the case of overturning of the wash bottle, but also to prevent any involuntary venting of the main tank 11 during the pressing on the deformable pressing area 111, which involuntary venting could for example be caused by the deformation of the distal end 116 after the pressing on the deformable pressing area 111, and which would then make it impossible to expel filtered liquid contained in the main tank 11, as will be explained hereinafter.

[0121] Thus, by removing the stopper 2 of the device for filtering of liquid and filling which is the subject of the invention, the user can carry out two main operations, i.e. filling the holding space 31 with hard water, and thus starting a filtering cycle, but also removing the main filtering device 3 from the main tank 11 in order to proceed with different maintenance operations, i.e. cleaning or replacement of the main filtering device 3, cleaning of the main tank 11, etc.

[0122] In order to maintain the main tank 11 at atmospheric pressure when it is filled with water to be filtered (with hard water), the device which is the subject of the invention comprises a means 117 for venting the main tank 11, shown in FIGS. 3 and 4. More specifically, the venting means 117 comprises a vent which makes it possible to put the filtering tank 34, and consequently the main tank 11, into communication with the atmosphere, such as to discharge the air from the main tank automatically as it is filled. The venting means 117 opens at the input orifice 32, as can be seen in said figures.

[0123] Thus, when the stopper 2 is put into place, the venting means 117 is no longer in communication with the atmosphere, in other words the filtering tank 34, but also the main tank 11, are isolated from the atmosphere. This means that, when the user presses on the deformable pressing area 111, there will be a decrease in the volume available, and thus an increase in the pressure, which will have the effect of expelling the liquid (in this case the filtered water) contained in the main tank 11 to the exterior, by means of the emptying duct 12. Once the desired volume of filtered liquid has been extracted, when the pressure on the deformable pressing area 111 ceases, the main tank will once more be in communication with the atmosphere, thanks to the free end 125, which allows air to penetrate once more into the interior of the main tank 11, and thus allow the deformable pressing area 111 to regain its initial form. This operating principle is in reality a well-known principle which governs the functioning of the different filling bottles which may be known.

[0124] Thus, the direction of flow of the liquid is as follows: input orifice 32, holding space 31 and dissipater 33, input grid 345, filtering element 341 and filtering tank 34, main tank 11, emptying duct 12, emptying spout 13, tank of the household electrical appliance.

[0125] In addition, the invention also relates to a method as such for filtering a liquid for the purpose of filling a household electrical appliance, comprising the following steps: [0126] a liquid to be filtered is poured into a holding space 31 upstream from the main tank 11, such as to permit the storage of the liquid to be filtered; [0127] the liquid to be filtered passes through a main filtering device 3 such as to be filtered; [0128] the liquid filtered by the main filtering device 3 is received and stored by a main tank 11, said main tank 11 being situated upstream from the main filtering device 3; [0129] a user presses a deformable pressing area 111 of the main tank 11, such as to convey the liquid contained in the main tank 11 to a tank of a household electrical appliance, thanks to an emptying duct 12, the emptying duct 12 and the main tank 11 being contained in the main body 1 of a device for filtering of liquid;

[0130] the preceding steps being carried out in the order indicated.