SWIMMING POOL FILTER WITH AN INLET FOR INJECTING RETURN WATER

Description

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

[0002] Filtration units are known to include a filtration tank containing at least one filter for filtering pool water. A pump, which can be used with a flow multiplier, creates a water flow within the pool basin and the filtration unit. To address environmental changes and the energy transition our society is undergoing, the applicant proposes a system for recovering pool overflow water and transferring it to a recovery tank with a capacity of several thousand liters, for example, approximately 5000 liters.

[0003] Therefore, there is a need to avoid polluting and contaminating the pool water, which has already been filtered and treated, with reclaimed water. This is both for the comfort of the pool owner and for environmental reasons, as it avoids treating water that has already been treated. Indeed, treating water that has already been treated leads to excessive electricity and chemical consumption.

[0004] The invention aims to effectively meet these needs by providing a filtration unit according to claim 1 for a swimming pool comprising: a filtration tank having a wall delimiting an internal space, at least one filter disposed inside the internal space of the filtration tank, the filtration tank having a recovery water injection spigot made in the wall of the filtration tank, said recovery water injection spigot being disposed upstream of the filter, said recovery water injection spigot being intended to be in fluidic communication with a water recovery tank, the block having a non-return valve being mounted in series with the recovery water injection spigot so as to avoid a gravity draining of the swimming pool basin.

[0005] The invention thus allows, by means of the wastewater injection port, the connection of the wastewater tank to the filtration unit via a pipe connected upstream of the filter, so that the wastewater used to fill the pool, which may be dirty, contain algae, etc., is directly filtered and treated before supplying the rest of the pool with clean water. US 2 979 206 A discloses a filtration unit according to the preamble of claim 1. Also, WO 2022 / 023826 A1, WO 2012 / 021935 A1, US 2006 / 102541 A1, US 11 111 683 B1 and FR 3 090 715 A1 disclose filtration units according to the prior art.

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

[0007] According to the invention, a non-return valve is mounted in series with the recovery water injection connection in order to prevent gravity draining of the swimming pool basin.

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

[0009] According to one embodiment of the invention, said filtration block includes a recovery water injection pump having 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 pattern.

[0013] According to one embodiment of the invention, said filtration block comprises a filtration pump having a variable speed, multispeed, 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 fluidic communication with the recovery water injection connection.

[0015] The invention will be better understood upon reading the following description and examining the accompanying figures. These figures are given only to illustrate, but in no way limit, the invention. [ Fig. 1 ] There figure 1 is a front perspective view of a filtration block according to the invention; [ Fig. 2 ] There figure 2 is a rear perspective view of a filtration block 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 connection.

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

[0017] THE figures 1 et 2 The diagram shows a filtration unit 10 for a swimming pool comprising a filtration tank 11 having a wall 14, in particular cylindrical in shape, delimiting an internal space. The wall 14 of the filtration tank is made of a material with a skimmer 13, preferably flared, having an opening 12 leading into a volume of the swimming pool. The opening 12 can be closed by a pivoting flap. Alternatively, the skimmer 13 is attached to and fixed on the wall 14 of the tank 11. The wall 14 of the filtration tank 11 has, at its upper end, an access opening 15 intended to be located at ground level around the 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 on the figure 2 A first filter 16.1 provides coarse filtration, allowing particles smaller than a fraction of a millimeter to pass through, based on a screen filter principle. For example, this first filter 16.1 consists of a molded filter basket with pores formed between ribs of injected plastic. 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 accordion-pleated nonwoven material. The sheet is held between two circular flanges and surrounded by an outer nonwoven material. Upstream of the first filter 16.1, a pre-filtration means may be provided, such as a mesh with pores 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 and carrying a primary water flow, is connected to an inlet of a pump 18. The pump's outlet is connected to an injection inlet 19 of a flow multiplier 21. A second conduit 22, also from the filtration tank 11 and carrying a secondary water flow, is connected to a suction inlet 24 of the flow multiplier 21. The flow multiplier 21, preferably of the Venturi type, comprises, as is known per se, a converging section and a diverging section to accelerate the water flow generated at its outlet 25. This creates a water circulation current within the swimming pool. The pump 18 may have a variable-speed, multi-speed electric motor to vary the intensity of the water flow within the pool, or alternatively, a fixed-speed motor.

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

[0021] Furthermore, as can be seen on the figure 3 The filtration tank 11 has an overflow outlet 33 located in the wall 14 of the filtration tank 11. The overflow outlet 33 is designed to be in fluidic communication with a water recovery tank 31. For this purpose, the overflow outlet 33 has a fitting to which a water outlet pipe is connected, leading to the water recovery tank 31. The overflow outlet 33 is located 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 allowing the water level in the swimming pool to be set as described in document FR3090715.

[0022] The filtration tank 11 also includes a recovery water injection port 30 made in the wall 14 of the filtration tank 11. The recovery water injection port 30 is located upstream of the filter 16.1 and / or the filter 16.2. The recovery water injection port 30 is designed to be in fluidic communication with a water recovery tank 31. The recovery water injection port 30 has a through-hole made in the wall of the filtration tank 11. The through-hole may be associated with a conduit coming from the material with the wall 14.

[0023] A non-return valve 35 is mounted in series with the recovery water injection fitting 30 to prevent gravity drainage of the swimming pool basin. A connection fitting 40 is also mounted on the recovery water injection fitting 30 for connection to a water inlet pipe 36. The non-return valve 35 can be positioned downstream of the connection fitting 40 with respect to the direction of water flow within the water inlet pipe 36.

[0024] A recovery water injection pump 37 has an inlet for fluid communication with the water contained in the water recovery tank 31. The pump 37 can be located 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 by means of a pipe.

[0025] The recovery water injection pump 37 also has an outlet to which the water inlet pipe 36 is connected, which is connected to the recovery water injection fitting 30 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 wastewater injection fitting 30. Alternatively, the connection fitting 40 is a quick-connect snap fitting of the same type as those used with garden hoses.

[0027] During the filling of the swimming pool with recovered water, the recovered water injection pump 37 draws water from the recovery tank 37 via its inlet and discharges it via its outlet into the water inlet pipe 36, which carries the water to the filtration tank 11 via the recovered water injection fitting 30. The recovered water 30 is injected along arrow F1 upstream of the filter 16.1, 16.2 of the filtration tank 11, as shown in the diagram. figure 3 The dirty recovery water is thus filtered and treated before returning to the swimming pool basin containing clean water.

[0028] The scope of protection of the invention is limited only by the attached claims.

Claims

1. A filtration block (10) for a swimming pool basin 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 in the filtration tank (11), characterized in that the filtration tank (11) has a connection piece for recovery water injection (30) in the wall (14) of the filtration tank (11), said connection piece for recovery water injection (30) being arranged upstream of the filter (16.1, 16.2), said connection piece for recovery water injection (30) being intended to be in fluidic communication with a water recovery tank (31), characterized in that: - a non-return valve (35) is mounted in series with the connection piece for recovery water injection (30) in order to avoid gravity draining of the swimming pool basin.

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

3. The filtration block according to claim 1 or 2, characterized in that it comprises a connection fitting (40) mounted on the connection piece for recovery water injection (30) and to be connected to a water inlet pipe (36).

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

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

6. The filtration block according to any one of the claims 1 to 5, characterized in that the filter (16.2) has a hollow cylindrical shape.

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

8. The filtration block according to any one of the claims 1 to 7, characterized in that it comprises a filtration pump (18) including a variable speed, multispeed, or fixed speed electric motor.

9. An assembly comprising a filtration block defined according to any one of the preceding claims and a water recovery tank (31) in fluidic communication with the connection piece for recovery water injection (30).