Water filtration system

Abstract

A filtration system (10) for filtering waste water comprising:- an inlet for water to be filtered (E) and an outlet for filtered water (S);- a pump (12) having a suction port and a discharge port;- a discharge circuit (C2) formed by at least one discharge pipe (2.2) capable of connecting the discharge port of the pump (12) to the filtered water outlet (S);- a filtration unit (15) being positioned on the discharge circuit (C2), interposed between the discharge port of the pump (12) and the filtered water outlet (S);- a first vortex generating member (20.1) positioned at the inlet of the filtration unit (15) to create a swirling movement of the water to be filtered by vortex effect, so as to accelerate the speed of the flow of water to be filtered before passing through the filtration unit (15). Abstract figure: Figure 1

Description

Title of the invention: Water filtration system Technical field

[0001] The present disclosure relates to a water filtration system, in particular the water of a swimming pool. Prior art

[0002] The water filtration system of a swimming pool generally comprises a suction circuit, a discharge circuit, a pump and a filter. The suction circuit is connected to the suction port of the pump to take the water to be filtered from the swimming pool and the discharge circuit is connected to the discharge port of the pump to discharge the filtered water. The water filter comprises a tank containing a filtering medium which is used to retain the impurities present in the waste water. The tank has an inlet opening for the water to be filtered coming for example from the swimming pool and an outlet opening for the filtered water which is intended to be reinjected into the swimming pool for reuse. To ensure effective maintenance of the swimming pool, it is necessary to carry out regular washing of the filter which becomes loaded with impurities as it operates.

[0003] There are several types of filters for filtering swimming pool water. There are sand filters, cartridge filters or filter bags.

[0004] Sand filters are generally installed on the discharge circuit, downstream of the pump. In this case, the inlet opening for the water to be filtered is connected to the water outlet of the pump. The filter medium comprises a layer of sand, designed to be crossed on both sides by the water to be filtered. The advantages of a sand filter lie in its low cost, its relatively long service life, and its ease of maintenance, as the filter medium is washed with water, countercurrently, using the existing installation. However, this type of filter is relatively bulky. Another disadvantage lies in the high water consumption required for washing and the high frequency of washing. Finally, another disadvantage of using a sand filter is that it does not allow filtration of impurities with dimensions smaller than 20 microns.

[0005] Cartridge or bag filters are generally installed in the suction circuit, upstream of the pump. Like sand filters, they have the advantage of low cost. In addition, they have a reduced footprint and can filter much finer particles, less than 6 pm. However, these filters clog very quickly. They must therefore be cleaned more often than sand filters, which increases maintenance costs. In addition, in order to clean them, their removal proves necessary. This maintenance step can be more or less complex in some cases.

[0006] Regardless of the type of filter used, whether it is installed on the water circuit before the pump or on the water circuit after the pump, clogging of the filters generally results in a reduction in the efficiency of the filtration and a reduction in the flow rate of the water in the circuit after passing through the filter.

[0007] Also, without harming the filtration quality, the invention proposes to increase the speed of the water flow before and after filtration to optimize the operation of the filtration, whatever the type of filter. Thus, it is possible for the user to extend the time of use of the filters, and thus to space out the time of changing the filters or washing the filters. The invention thus aims to improve the various existing filtration devices by allowing better operation of the filters in order to reduce the cleaning frequency.

[0008] The invention aims to propose a wastewater filtration device of high efficiency, while minimizing the operating cost, namely low electrical consumption and low water consumption for washing the filters. Summary

[0009] The present disclosure improves the situation.

[0010] A filtration system for filtering waste water is provided, comprising: a. a water inlet to be filtered (E) and a filtered water outlet (S); b. a pump having a suction port and a discharge port c. a suction circuit (Cl) formed of at least one suction pipe capable of connecting the inlet of water to be filtered (E) to the suction port of the pump; d. a discharge circuit (C2) formed of at least one discharge pipe capable of connecting the discharge port of the pump to the filtered water outlet (S); e. a filtration unit being positioned on the discharge circuit (C2), interposed between the discharge orifice of the pump and the filtered water outlet; f. a first water flow speed acceleration circuit (C3) formed of at least one acceleration pipe arranged parallel to the discharge circuit (C2) and positioned between the discharge orifice of the pump and the inlet of the filtration unit, said acceleration circuit (C3) comprising a first vortex generating member positioned at the inlet of the filtration unit, said vortex generating member being configured to create a swirling movement of the water to be filtered by vortex effect, so as to accelerate the speed of the flow of water to be filtered before passing through the filtration unit.

[0011] The characteristics set out in the following paragraphs may, optionally- ally, be implemented, independently of each other or in combination with each other:

[0012] The discharge circuit (C2) comprises a first bypass positioned at the inlet of the filtration unit, the flow of water to be filtered circulating in the discharge circuit (Cl) and the flow of water to be filtered circulating in the acceleration circuit (C5) being introduced at the inlet of the filtration unit through said first bypass.

[0013] The vortex generating member comprises a solid cylindrical main body whose ends form a point, at least one helical blade arranged on the external wall of the solid cylindrical body extending from one end of the body towards the opposite end of said body, said member having a dimension adapted to be placed inside an acceleration conduit.

[0014] Preferably, the cylindrical body is arranged coaxially with respect to the acceleration pipe.

[0015] According to one embodiment, the vortex generating member is fixed to the acceleration pipe by fixing elements.

[0016] According to another embodiment, the solid cylindrical main body and said at least one helical blade are formed from a single piece.

[0017] According to yet another embodiment, said at least one helical blade is an added part fixed to the external wall of the solid cylindrical body.

[0018] According to another embodiment, the filtration system further comprises a second water flow speed acceleration circuit (C4) formed of at least one acceleration pipe arranged parallel to the discharge circuit (C2) and positioned between the outlet of the filtration unit and the filtered water outlet (S), said second acceleration circuit (C5) comprising a second vortex generating member positioned at the outlet of the filtration unit, said second vortex generating member being configured to create a swirling movement of the filtered water by vortex effect, so as to accelerate the speed of the filtered water flow before being discharged via the filtered water outlet (S).

[0019] According to an exemplary embodiment, the discharge circuit (C2) comprises a second bypass positioned at the outlet of the filtration unit, the flow of filtered water circulating in the second acceleration circuit (C4) being introduced into the discharge circuit (C2) through said second bypass to be discharged via the filtered water outlet (S).

[0020] According to a particularly advantageous embodiment, the filtration system also comprises a UV radiation disinfection device, said disinfection device being positioned on the discharge circuit (C2), between the outlet of the filtration unit and the filtered water outlet (S). Brief description of the drawings

[0021] Other characteristics, details and advantages will appear on reading the detailed description below, and on analyzing the attached drawings, in which: Fig. 1

[0022] [Fig-1] [Fig.l] is a block diagram showing a filtration system according to a embodiment comprising a vortex generating member. Fig. 2

[0023] [Fig.2] [Fig.2] shows a schematic sectional view of a first example of a vortex generating organ used in the filtration system of [Fig.l]. Fig. 3

[0024] [Fig.3] [Fig.3] shows a schematic sectional view of a second example of a vortex generating organ used in the filtration system of [Fig.l]. Fig. 4A

[0025] [Fig.4A] [Fig.4A] shows a cross-sectional view of the vortex generating member of [Fig.3], the member comprising three helical blades having a rectangular shape in the cross-sectional plane. Fig. 4B

[0026] [Fig.4B] [Fig.4B] shows a cross-sectional view of a vortex generating member having three helical blades having a trapezoidal shape. Fig. 4C

[0027] [Fig.4C] [Fig.4C] shows a cross-sectional view of a vortex generating member having three helical blades having a triangular shape. Fig. 5

[0028] [Fig.5] is a block diagram showing a filtration system according to another mode of construction comprising two vortex generating members, positioned respectively before the filtration unit and after the filtration unit. Description of the embodiments

[0029] The embodiments which will be described below are in no way limiting. In particular, all the variants and all the embodiments described are intended to be combined with each other in all possible combinations.

[0030] For clarity, identical or similar elements are identified by identical reference signs throughout the figures.

[0031] It is also noted that the figures are not to scale.

[0032] The present invention makes it possible to improve the operation of existing filtration installations, which, for example, implement filtration devices arranged on the discharge circuit, after the pump. The invention can, however, also be applied to other types of filtration installation, for example filtration systems whose filtration device is located on the suction circuit, on the suction side of the pump.

[0033] As indicated above, in known systems, the speed of the water flow in the pipe is too low to optimally exploit the capacity of the filtration device which quickly clogs on the surface and results in a relatively high frequency of changes.

[0034] According to the invention, a vortex generating member comprising a cylindrical body and one or more helical blades arranged on the external wall of the body is positioned before and / or after the filtration unit in order to create a swirling movement of water by vortex effect to accelerate the speed of the flow of water at the inlet of the filtration unit and at the outlet of the filtration unit.

[0035] Reference is now made to [Fig. 1] which represents a block diagram of a filtration system according to one embodiment of the invention. This system is designed to filter waste water, for example the water of a swimming pool.

[0036] The system comprises a water inlet opening to be filtered (E), a water circulation pump 12, a filtration unit 15, and a filtered water outlet opening (S) and a set of hydraulic pipes 2.2 which allow them to be connected together.

[0037] In the case where the system is intended to be used to filter the water of a swimming pool which is not shown in [Fig.l], the inlet opening for the water to be filtered (E) can be adapted to be put into communication with the swimming pool to filter the water contained therein. The outlet opening for the filtered water (S) can be adapted to be put into communication with the swimming pool to supply the pool with filtered water. For example, the pool can comprise one or two suction openings which are connected to the water inlet opening (E) and one or two discharge openings which are connected to the water outlet opening (S). The filtration system thus establishes an inlet circulation between one of the suction openings of the pool and one of the discharge openings of the pool.

[0038] Preferably, the filtration system 10 is arranged close to the swimming pool basin to reduce pressure losses and reduce the length of the connecting pipe making it possible to connect the filtration system to the suction opening and to the discharge opening.

[0039] According to an embodiment as illustrated in [Fig.l], the water circulation pump 12 comprises a suction port and a discharge port. The suction port of the pump is connected by a suction circuit C1 to the main inlet opening for the water to be filtered (E). In [Fig.l], the water loaded with impurities taken from the pool basin is brought by a pipe 2.1 to the inlet of the pump 12. The filtration system may comprise a pre-filtration device installed between the water inlet (E) and the inlet of the pump 12.

[0040] The flow of water to be filtered at the outlet of the pump is separated into two flows Q1, Q2. A first flow circulating in a main discharge circuit C2 is introduced into the filtration unit 15 through a bypass 14.1. The first flow of water is brought by a water pipe 2.2 to the filtration unit 15. A second flow of water circulates in a circuit for accelerating the speed of the water flow C3. The water flow acceleration circuit C3, interposed between the outlet of the pump 12 and the inlet of the filtration unit 15, is arranged parallel to the discharge circuit C2. One end of this circuit C3 is connected to a zone of the pipe 2.2 at the outlet of the pump 12 and the opposite end is connected to the inlet of the filtration unit 15 through the bypass 14.1.

[0041] The water flow speed acceleration circuit C3 is formed by a set of hydraulic pipes 2.5. A vortex generating member 20.1 is fixed inside one of the pipes 2.5 having one end connected to the inlet of the filtration unit 15. The vortex generating member 20.1 is positioned at the inlet of the filtration unit 15. This vortex generating member 20.1 is configured to create a swirling movement of the water to be filtered by vortex effect so as to increase the speed of the flow of water in the pipe 2.5 after passing through the vortex generating member. The second water flow Q2 circulating in the speed acceleration circuit C3 is thus accelerated in the pipe 2.5 before being introduced into the bypass 14.1.

[0042] The two flows circulating respectively in the pipes 2.2 of the discharge circuit and in the pipes 2.5 of the acceleration circuit are introduced at the inlet of the filtration unit 15 through the bypass 14.1. The water outlet of the filtration unit 15 is connected to the discharge opening (S) by a discharge pipe 2.2. The filtered water at the outlet of the filtration unit 15 is brought by this discharge pipe 2.2 to a discharge opening (S) which can be connected to one or more discharge nozzles to reinject the filtered water into the swimming pool.

[0043] According to the embodiment illustrated in [Fig.l], the system 10 may also comprise a certain number of modules making it possible to control and regulate the flow rate of the water and the pressure of the water circulating in the suction circuit, the discharge circuit and the circuit for accelerating the speed of the flow of the water.

[0044] As an example as illustrated in [Fig.l], the filtration system may comprise for example a valve 13.1 positioned at the outlet of the pump 12, a valve 13.2 positioned at the inlet of the bypass 14 and a valve 13.3 positioned between the outlet of the filtration unit 15 and the filtered water outlet opening (S).

[0045] The filtration system 10 may also comprise a valve 13.4 positioned on the acceleration circuit C3, before the vortex generating member 20 to regulate the flow rate of the water circulating in the acceleration circuit.

[0046] According to one embodiment, the system may comprise pressure sensors installed on the suction circuit, the discharge circuit and the water flow rate acceleration circuit.

[0047] According to an exemplary embodiment, the system may comprise, for example, a pressure sensor positioned on the acceleration circuit, before the vortex generating member 20, in order to measure the value of the pressure of the water circulating in the pipe 2.5, before passing through the vortex generating member 20, to comply with a pressure setpoint set by the operator as a function of technical constraints linked to the equipment used, for example the limit pressure of use of the filtration unit.

[0048] The filtration unit 15 may comprise a reservoir in which a filter medium is located. According to an exemplary embodiment, the filter medium is for example formed by a filter medium comprising a plurality of filtration holes having a dimension between 10 μm and 300 μm. Preferably, the filter medium is made of stainless steel alloy.

[0049] According to another exemplary embodiment, the filtering medium of the filtration unit 15 may be a layer of sand.

[0050] The vortex generating member will be described in more detail below with reference to Figures 2, 3.

[0051] [Fig. 2] is a longitudinal sectional view of a vortex generating member 20 according to an exemplary embodiment positioned in a hydraulic pipe 2 to generate a swirling movement of the water passing through it by vortex effect. It comprises a main body 21 in elongated cylindrical shape, the two ends of which respectively form a tip 24, 25 having a conical shape and two helical blades or ribbons 22, 23 on the external wall of the cylindrical body.

[0052] The main body is solid and has the profile of a straight cylinder, with a circular section. The pipe 2 has a shape of revolution around a longitudinal axis XX'. When the member is mounted in the pipe, the cylindrical body 20 and the pipe 2 are arranged coaxially around the axis XX'.

[0053] The two blades 22, 23 start from one end 24 of the cylindrical body, each follow a helical generatrix of the cylindrical body without ever crossing, and arrive at the other end 25. [Fig.2] illustrates a first example of embodiment of the helical blades which are in the form of a thread which each follows a generatrix along the peripheral wall of the solid cylindrical body.

[0054] The blades 22, 23 may be separate parts of the cylindrical body and are attached to the main body.

[0055] They can also be obtained with the cylindrical body, by a one-piece molding. The body and the blades thus form a single piece, thus allowing greater rigidity to be presented.

[0056] The helical blades have the function of making the water flow cross and creating a water vortex when crossing the water flow. When the vortex generating member 20 is mounted in a hydraulic pipe 2, in particular a hydraulic pipe which is part of a filtration system, and in use, a water flow F represented by arrows circulates along the peripheral wall of the main body from the upstream end to the downstream end. The water flow circulates in the form of a laminar flow upstream of the vortex generating member. By crossing the helical blades, the laminar flow is transformed into a vortex downstream of the vortex generating member. Under the effect of this vortex, the speed of the flow of the water to be filtered is increased before being introduced into the filtration unit.

[0057] According to one embodiment, in [Fig.l], the internal diameter of the acceleration line 2.5 of the acceleration circuit C3 is smaller than the internal diameter of the discharge line 2.2. For example, the diameter of the hydraulic line of the acceleration circuit 2.5 may be, for example, a half or a third of the internal diameter of the discharge line. For example, the acceleration line 2.5 may have a diameter of 42 mm and the discharge line 2.2 may have a diameter of 90 mm.

[0058] The vortex generating member 20 can be mounted in the hydraulic pipe 2 by means of a fixing system.

[0059] According to an exemplary embodiment as illustrated in [Fig. 2], the cylindrical body 21 is fixed to the hydraulic pipe 2 by fixing elements 27, 28. The cylindrical body is provided with fixing holes which are located on the circumference of the body and the wall of the hydraulic pipe is provided with corresponding fixing holes. When mounting the vortex generating member in the hydraulic pipe, the fixing holes of the vortex generating member 20 and the fixing holes of the hydraulic pipe 2 are placed opposite each other to receive a fixing element which makes it possible to fix the cylindrical body 21 in a sealed manner on the wall of the pipe 2. In [Fig. 2], two fixing elements 27, 28 are visible.

[0060] The vortex generating member 20 may comprise one or more helical blades. The number of helical blades may vary depending on the needs of the application implementing the filtration system of the present invention. Thus, more than three helical blades may be provided if the cylindrical main body has a suitable large dimension. According to the invention, the helical blades may be of any shape.

[0061] [Fig.3] illustrates a vortex generating member 30 according to another example of rea lization. It comprises a main body 31 in elongated cylindrical shape, the two ends of which respectively form a point 34, 35 having a conical shape and three helical blades or ribbons 32, 33, 36 on the external wall of the cylindrical body. In [Fig. 3], only two helical blades 32, 33 are visible. The two blades 32, 33 extend from an upstream end 34 of the main body 31 to the opposite end 35 of the cylindrical body 31. The helical blade is more pronounced and is in the form of a ribbon following a helical generating line on the external wall of the cylindrical body. The ribbon has a constant thickness over its entire length. The ends of the blades are formed of points.

[0062] Similarly, the cylindrical body 31 is fixed to the hydraulic pipe 2 by fixing elements 37, 38. The cylindrical body is provided with fixing holes which are located on the circumference of the body and the wall of the hydraulic pipe is provided with corresponding fixing holes. When mounting the vortex generating member in the hydraulic pipe, the fixing holes of the vortex generating member 30 and the fixing holes of the hydraulic pipe 2 are placed opposite each other to receive a fixing element which makes it possible to fix the cylindrical body 31 in a sealed manner on the wall of the pipe 2.

[0063] [Fig.4A] shows a cross-sectional view of the vortex generating member 30 mounted in the conduit 2 of [Fig.3]. The three helical blades 32, 33, 36 are distributed on the wall of the main body 31 by angular intervals of 120°. The blades have a rectangular shape in the section plane along an axis AA of [Fig.3].

[0064] The helical blades may have other shapes. [Fig.4B] for example shows a cross-sectional view of a vortex generating member 50 which comprises three helical blades 52, 53, 54 distributed on the wall of the main body 51 by angular intervals of 120°. The helical blades here have a trapezoidal shape in the transverse plane.

[0065] [Fig.4C] shows a cross-sectional view of a vortex generating member 60 which comprises three helical blades 62, 63, 64 distributed on the wall of the main body 61 by angular intervals of 120°. The helical blades have a triangular shape in the transverse plane.

[0066] Preferably, the dimension of the blades is adjusted so as to limit the clearance between the peripheral edge of the blades and the internal wall of the pipe in which the vortex generating member is installed. According to an exemplary embodiment, the peripheral edge of the blades has a curvature which matches the curvature of the internal wall of the pipe 2.

[0067] [Fig.5] illustrates a filtration system according to another embodiment.

[0068] As in the example illustrated in [Fig.l], the filtration system 100 comprises an inlet opening for water to be filtered (E), a water circulation pump 12, a filtration unit 15, and an outlet opening for filtered water (S), a first vortex generating member 20.1 positioned before the filtration unit 15 and a set of hydraulic lines that allow them to be connected together.

[0069] According to the invention, the filtration system further comprises a second vortex generating member 20.2 positioned after the filtration unit 15 in order to create a swirling movement of water to accelerate the speed of the flow of filtered water at the outlet of the filtration unit 15.

[0070] Similarly, the water inlet opening to be filtered (E) may be adapted to be placed in communication with the swimming pool basin to filter the water contained therein or any other wastewater reservoir. The filtered water outlet opening (S) may be adapted to be placed in communication with the swimming pool basin to supply the basin with filtered water or any other reservoir intended to receive filtered water. The filtration system thus establishes a circulation of water by taking water to be filtered from a reservoir and supplying the same reservoir in the case of a swimming pool basin or another reservoir with filtered water.

[0071] The part which is upstream of the filtration unit 15 is common to that of the filtration system of [Fig.l] and will not be described below.

[0072] As indicated above, the filtration system 100 here comprises a second vortex generator member 20.2 to accelerate the speed of the flow of the filtered water at the outlet of the filtration unit 15. In addition, the filtration system comprises a UV disinfection device 18 positioned after the filtration unit 15. Thus, the filtered and disinfected water before being discharged through the discharge opening (S).

[0073] The flow of water leaving the filtration unit 15 is introduced into a second bypass 14.2. The flow leaving the second bypass is divided into two flows. A first flow circulating in a discharge circuit C2 is introduced into the disinfection unit 18. The first flow of water is brought by a water pipe 2.2 to the disinfection unit 18. A second flow of water is caused to circulate in a second water flow speed acceleration circuit C4. The second acceleration circuit is formed by a set of water pipes 2.6. One end of the second circuit is connected to the pipe 2.2 of the discharge circuit at the outlet of the second bypass 14.2 and the opposite end of the second circuit is connected to an inlet of the second bypass 14.2. In other words, the second circuit C4 is arranged in parallel to the discharge circuit after the filtration unit 15 by forming a loop connecting the water outlet of the second bypass 14.2 and the inlet of the second bypass 14.2.This second speed acceleration circuit C4 comprises a second vortex generating member 20.2 fixed inside the water pipe at the inlet of the second bypass 14.2. This second vortex generating member 20.2 is configured to create a swirling movement of the filtered water by vortex effect so as to increase the speed of the flow of the filtered water in the pipe after passing through the generating member. of vortex 20.2. The second flow of water circulating in the speed acceleration circuit C4 is thus accelerated in the pipe 2.6 before being reintroduced into the bypass 14.2.

[0074] The filtered water outlet of the second bypass 14.2 is connected to the inlet of the UV disinfection device 18 by the discharge pipe 2.2. The filtered water is brought to the inlet of the disinfection device 18 by this pipe 2.2. The outlet of the disinfection unit 18 is connected to the discharge opening (S) by another discharge pipe 2.2. The filtered and disinfected water at the outlet of the disinfection unit 18 is brought by this discharge pipe to the discharge opening (S). In an example application in which the filtration system is used to filter and disinfect swimming pool water. The outlet opening S is connected to one or more return nozzles to reinject the filtered and disinfected water into the swimming pool basin.

[0075] According to the embodiment illustrated in [Fig.5], the filtration system 100 may also comprise a certain number of modules making it possible to control and regulate the flow rate of the water and the pressure of the water circulating in the second circuit for accelerating the speed of the flow of the water.

[0076] As an example as illustrated in [Fig.5], the filtration system may comprise for example a valve 13.3 positioned on the second acceleration circuit C4, before the second vortex generating member 20.2, to regulate the flow rate of the water circulating in the second acceleration circuit.

[0077] The filtration system 10 may also comprise a valve 13.5 positioned at the inlet of the disinfection device 18 and a valve 13.6 at the outlet of the disinfection device 18.

[0078] The system may also include a traffic control sensor 19 after the second bypass.

[0079] According to an exemplary embodiment, the second vortex generating member 20.2 positioned in the conduit 2.6 of the second acceleration circuit of [Fig.5] may be identical to that of [Fig.l]. It comprises a main body 21 in elongate cylindrical shape, the two ends of which respectively comprise a tip 24, 25 having a conical shape and two helical blades or ribbons 22, 23 on the peripheral wall of the cylindrical body. The main body is solid and has the profile of a right cylinder, with a circular section.

[0080] As in the embodiment of [Fig.l], the internal diameter of the pipe 2.6 of the second acceleration circuit C4 is smaller than the internal diameter of the other pipes of the discharge circuit 2.2. For example, the diameter of the pipe 2.6 of the acceleration circuit may be, for example, a half or a third of the internal diameter of the discharge pipe 2.2, in order to allow the pressure to be regulated. For example, the pipe of the acceleration circuit 2.6 may have a diameter of 42 mm and the pipe of the discharge circuit 2.2 may have a diameter of 90 mm. Industrial application

[0081] The system of the present invention has a high degree of modularity of operation. It can be used in various wastewater treatments. For example, it can be used to filter rainwater. It can be used in different types of wastewater treatment facilities.

[0082] Thanks to the presence of the vortex generating member, the filtration capacity of the filter medium is optimally exploited, thus making it possible to space out the cleaning frequency and limit energy consumption.

[0083] The present disclosure is not limited to the examples described above, but it encompasses all the variants that a person skilled in the art may envisage within the framework of the protection sought.

Claims

Claims

1. A filtration system (10) for filtering waste water, comprising: a. a water inlet to be filtered (E) and a filtered water outlet (S); b. a pump (12) having a suction port and a discharge port c. a suction circuit (Cl) formed of at least one suction pipe (2.1) capable of connecting the inlet of water to be filtered (E) to the suction port of the pump (12); d. a discharge circuit (C2) formed of at least one discharge pipe (2.2) capable of connecting the discharge orifice of the pump (12) to the filtered water outlet (S); e. a filtration unit (15) being positioned on the discharge circuit (C2), interposed between the discharge orifice of the pump (12) and the filtered water outlet (S); f. a first water flow speed acceleration circuit (C3) formed of at least one acceleration pipe (2.5) arranged parallel to the delivery circuit (C2) and positioned between the delivery orifice of the pump (12) and the inlet of the filtration unit (15), said acceleration circuit (C3) comprising a first vortex generating member (20.1) positioned at the inlet of the filtration unit (15), said vortex generating member (20.1) being configured to create a swirling movement of the water to be filtered by vortex effect, so as to accelerate the speed of the flow of water to be filtered before passing through the filtration unit (15).

2. Filtration system according to claim 1, in which the discharge circuit (C2) comprises a first bypass (14.1) positioned at the inlet of the filtration unit (15), the flow of water to be filtered circulating in the discharge circuit (C2) and the flow of water to be filtered circulating in the acceleration circuit (C3) being introduced at the inlet of the filtration unit (15) through said first bypass (14).

3. Filtration system according to claim 1 or 2, in which the vortex generating member (20.1) comprises a solid cylindrical main body (21) whose ends form a tip (24, 25), at least one helical blade (22, 23) arranged on the external wall of the solid body cylindrical (21) extending from one end of the body (24) towards the opposite end (25) of said body (20), said member having a dimension adapted to be placed inside an acceleration pipe (2).

4. A filtration system according to claim 3, wherein the cylindrical body (21) is arranged coaxially with respect to the acceleration pipe (2.5).

5. A filtration system according to claim 3 or 4, wherein the vortex generating member (20.1) is secured to the acceleration pipe (2.5) by fastening elements (27, 28).

6. Filtration system according to one of claims 3 to 5, in which the solid cylindrical main body (21) and said at least one helical blade (22, 23) are formed in a single piece.

7. Filtration system according to one of claims 3 to 5, in which said at least one helical blade (22, 23) is an attached part fixed to the external wall of the solid cylindrical body (21).

8. Filtration system according to one of claims 1 to 7, comprising a second water flow speed acceleration circuit (C4) formed of at least one acceleration pipe (2.6) arranged parallel to the discharge circuit (C2) and positioned between the outlet of the filtration unit (15) and the filtered water outlet (S), said second acceleration circuit (C4) comprising a second vortex generating member (20.2) positioned at the outlet of the filtration unit, said second vortex generating member (20.2) being configured to create a swirling movement of the filtered water by vortex effect, so as to accelerate the speed of the filtered water flow before being discharged via the filtered water outlet (S).

9. Filtration system according to claim 8, in which the discharge circuit (C2) comprises a second bypass (14.2) positioned at the outlet of the filtration unit (15), the flow of filtered water circulating in the second acceleration circuit (C4) being introduced into the discharge circuit (C2) through said second bypass (14.2) to be discharged via the filtered water outlet (S).

10. Filtration system according to one of claims 1 to 9, comprising a UV radiation disinfection device (18), said disinfection device being positioned on the discharge circuit (C2), between the outlet of the filtration unit (15) and the filtered water outlet (S).

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