Swimming pool filter tank provided with a branch tap for injecting recovery water

Abstract

The invention mainly relates to a filtration unit for a swimming pool comprising: - a filtration tank (11) comprising a wall (14) delimiting an internal space, - at least one filter arranged inside the internal space of the filtration tank (11), and - a recovery water injection connection (30) made in the wall (14) of the filtration tank (11), said recovery water injection connection (30) being arranged upstream of the filter, said recovery water injection connection (30) being intended to be in fluid communication with a water recovery tank (31), and a non-return valve (35) being mounted in series with the recovery water injection connection so as to avoid gravity draining of the swimming pool.

Description

[0001] The invention relates to a filtration tank for a swimming pool equipped with a recovery water injection tap.

[0002] Filtration units are known comprising a filtration tank containing at least one filter intended to filter the swimming pool water. A pump that can be associated with a flow multiplier makes it possible to create a flow of water inside the swimming pool and the filtration unit. In order to cope with the environmental changes and the energy transition that our society is currently experiencing, the applicant proposes a system for recovering water from the swimming pool overflow into a recovery tank of several thousand liters, for example of the order of 5000L.

[0003] There is therefore a need to avoid polluting and dirtying the pool water that has already been filtered and treated by the water from the recovery, both for the comfort of the pool owner and for environmental reasons, so as not to treat water that has already been treated. Indeed, treating already treated water results in excess electricity consumption and excess chemical consumption.

[0004] The invention aims to effectively meet these needs by proposing a filtration unit for a swimming pool comprising: a filtration tank comprising a wall delimiting an internal space, at least one filter arranged inside the internal space of the filtration tank, the filtration tank comprising a recovery water injection tapping made in the wall of the filtration tank, said recovery water injection tapping being arranged upstream of the filter, said recovery water injection tapping being intended to be in fluid communication with a water recovery tank.

[0005] The invention thus makes it possible, thanks to the recovery water injection tapping, to connect the water recovery tank to the filtration unit via a pipe connected upstream of the filter so that the recovery water which will be used to fill the pool and which may be dirty, contain algae, etc., is directly filtered and treated before supplying the rest of the pool containing clean water.

[0006] According to one embodiment of the invention, said filtration block comprises an overflow outlet made in the wall of the filtration tank, said overflow outlet being intended to be in fluid communication with the water recovery tank.

[0007] According to one embodiment of the invention, a non-return valve is mounted in series with the recovery water injection tapping so as to avoid gravity draining of the swimming pool basin.

[0008] According to one embodiment of the invention, said filtration block comprises a connection fitting mounted on the recovery water injection tapping for connection with a water inlet pipe.

[0009] According to one embodiment of the invention, said filtration unit comprises a recovery water injection pump comprising an outlet to which the water inlet pipe is connected.

[0010] According to one embodiment of the invention, the connection fitting is a union fitting to facilitate the assembly / disassembly of the water inlet pipe.

[0011] According to one embodiment of the invention, the filter has a hollow cylindrical shape.

[0012] According to one embodiment of the invention, the filter is preferably made of a sheet of non-woven material pleated in an accordion fashion.

[0013] According to one embodiment of the invention, said filtration unit comprises a filtration pump comprising a variable speed, multi-speed, or fixed speed electric motor.

[0014] The invention also relates to an assembly comprising a filtration block as previously defined and a water recovery tank in fluid communication with the recovery water injection tap.

[0015] The invention will be better understood by reading the following description and examining the accompanying figures. These figures are given only for illustrative purposes but in no way limit the invention. [ Fig. 1 ] There figure 1 is a front perspective view of a filtration unit according to the invention; [ Fig. 2 ] There figure 2 is a rear perspective view of a filtration unit according to the invention; [ Fig. 3 ] There figure 3 shows perspective views from two different angles of the same filtration tank equipped with a recovery water injection tap.

[0016] Identical, similar or analogous elements retain the same reference from one figure to another.

[0017] THE figures 1 et 2 show a filtration unit 10 for a swimming pool comprising a filtration tank 11 having a wall 14, in particular of cylindrical shape, delimiting an internal space. The wall 14 of the filtration tank is made of a single material with a recovery conduit 13 (called a "skimmer" in English), preferably of flared shape, having an opening 12 opening into a volume of the swimming pool basin. The opening 12 can be closed by a pivoting flap. Alternatively, the recovery conduit 13 is attached and fixed to the wall 14 of the tank 11. The wall 14 of the filtration tank 11 has on the side of its upper end an access opening 15 intended to be located at ground level around the swimming pool. The access opening 15 is intended to be closed by a removable hatch (not shown).

[0018] At least one filter is arranged inside the internal space of the filtration tank 11. Advantageously, as can be seen in the figure 2 , a first filter 16.1 provides coarse filtration allowing particles smaller than a fraction of a millimeter to pass through on a screen filter principle. For example, this first filter 16.1 consists of a molded filter basket having orifices formed between ribs of injected plastic material. In addition, a second filter 16.2 providing fine filtration has a hollow cylindrical shape. This cylindrical filter 16.2 is preferably made of a sheet of non-woven material pleated in an accordion fashion. The sheet is held between two circular flanges and surrounded by an outer non-woven material. Upstream of the first filter 16.1, a pre-filtration means may be provided, such as, for example, a cloth with orifices of 0.1 to 0.5 mm, for example 0.3 mm. Alternatively, the filter 16.2 may be made of a woven material.

[0019] A first conduit 17 connected to the filtration tank 11 in which a primary water flow circulates is connected to an inlet of a pump 18, which has an outlet connected to an injection inlet 19 of a flow multiplier 21. A second conduit 22 from the filtration tank 11 in which a secondary water flow circulates is connected to a suction inlet 24 of the flow multiplier 21. The flow multiplier 21, preferably of the Venturi type, comprises, in a manner known per se, a convergent section and a divergent section to accelerate the water flow generated at its outlet 25. This creates a water circulation current inside the swimming pool. The pump 18 may comprise a variable speed, multi-speed electric motor, in order to vary the intensity of the water flow inside the pool, or alternatively at fixed speed.

[0020] The recovery conduit 13 and the outlet 25 of the flow multiplier can open into a plate 26 integrated into a wall 27 of the swimming pool or into two separate plates.

[0021] Furthermore, as can be seen on the figure 3 , the filtration tank 11 comprises an overflow outlet 33 made in the wall 14 of the filtration tank 11. The overflow outlet 33 is intended to be in fluid communication with a water recovery tank 31. For this purpose, the overflow outlet 33 comprises a connector to which a water outlet pipe opening towards the water recovery tank 31 is connected. The overflow outlet 33 is made in the upper part of the filtration tank 11, upstream of the filter 16.1 and / or the filter 16.2. The overflow outlet 33 can be associated with an adjustable level overflow system 32 making it possible to adjust a water level in the swimming pool as described in document FR3090715.

[0022] The filtration tank 11 also comprises a recovery water injection tapping 30 made in the wall 14 of the filtration tank 11. The recovery water injection tapping 30 is arranged upstream of the filter 16.1 and / or the filter 16.2. The recovery water injection tapping 30 is intended to be in fluid communication with a water recovery tank 31. The recovery water injection tapping 30 comprises a through opening made in the wall of the filtration tank 11. The through opening may be associated with a conduit made of the same material as the wall 14.

[0023] A non-return valve 35 is mounted in series with the recovery water injection connection 30 so as to avoid gravity draining of the swimming pool. A connection fitting 40 is also mounted on the recovery water injection connection 30 for connection with a water inlet pipe 36. The non-return valve 35 may be arranged downstream of the connection fitting 40 relative to a direction of flow of the water inside the water inlet pipe 36.

[0024] A recovery water injection pump 37 has an inlet in fluid communication with the water contained in the water recovery tank 31. The pump 37 may be disposed inside the water recovery tank 31 or outside the water recovery tank 31. In this case, the inlet of the pump 37 is connected to the water recovery tank 31 via a pipe.

[0025] The recovery water injection pump 37 also has an outlet to which the water inlet pipe 36 connected to the recovery water injection tapping 30 is connected via the connection fitting 40.

[0026] Advantageously, the connection fitting 40 is a union fitting to facilitate the assembly / disassembly of the water inlet pipe 36. The union fitting 40 has two tapped and / or threaded ends. The union fitting 40 is for example screwed onto a threaded area of the recovery water injection tapping 30. Alternatively, the connection fitting 40 is a snap-on quick-connect fitting of the same type as those used with garden hoses.

[0027] When filling the swimming pool with recovered water, the recovered water injection pump 37 draws water contained in the recovery tank 37 via its inlet and delivers it via its outlet into the water inlet pipe 36 which conveys the water to the filtration tank 11 via the recovered water injection connection 30. The recovered water 30 is injected along the arrow F1 upstream of the filter 16.1, 16.2 of the filtration tank 11, as shown in the figure 3 The dirty recovery water is thus filtered and treated before being returned to the swimming pool containing clean water.

[0028] Of course, the preceding description has been given by way of example only and does not limit the scope of the invention, which would not be exceeded by replacing the various elements with any other equivalents.

[0029] Furthermore, the various features, variations, and / or embodiments of the present invention may be combined with each other in various combinations, provided that they are not incompatible or mutually exclusive.

Claims

1. Filtration unit (10) for a swimming pool comprising: - a filtration tank (11) comprising a wall (14) delimiting an internal space, - at least one filter (16.1, 16.2) arranged inside the internal space of the filtration tank (11), characterized in that the filtration tank (11) comprises a recovery water injection tapping (30) made in the wall (14) of the filtration tank (11), said recovery water injection tapping (30) being arranged upstream of the filter (16.1, 16.2), said recovery water injection tapping (30) being intended to be in fluid communication with a water recovery tank (31), - a non-return valve (35) being mounted in series with the recovery water injection tapping (30) so as to avoid gravity draining of the swimming pool.

2. Filtration block according to claim 1, characterized in thatit comprises an overflow outlet (33) made in the wall (14) of the filtration tank (11), said overflow outlet (33) being intended to be in fluid communication with the water recovery tank (31).

3. Filtration block according to claim 1 or 2, characterized in that it comprises a connection fitting (40) mounted on the recovery water injection tapping (30) for connection with a water inlet pipe (36).

4. Filtration block according to claim 3, characterized in that it comprises a recovery water injection pump (37) having an outlet to which the water inlet pipe (36) is connected.

5. Filtration block according to claim 3 or 4, characterized in that the connection fitting (40) is a union fitting to facilitate the assembly / disassembly of the water inlet pipe (36).

6. Filtration block according to any one of claims 1 to 5, characterized in thatthe filter (16.2) has a hollow cylindrical shape.

7. Filtration block according to claim 6, characterized in that the filter (16.2) is preferably made of a sheet of non-woven material pleated in an accordion fashion.

8. Filtration block according to any one of claims 1 to 7, characterized in that it comprises a filtration pump (18) comprising a variable speed, multi-speed, or fixed speed electric motor.

9. Assembly comprising a filtration block defined according to any one of the preceding claims and a water recovery tank (31) in fluid communication with the recovery water injection tapping (30).

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