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EP2919915B1 - Swimming-pool filtering device - Google Patents

Swimming-pool filtering device Download PDF

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Publication number
EP2919915B1
EP2919915B1 EP13792886.7A EP13792886A EP2919915B1 EP 2919915 B1 EP2919915 B1 EP 2919915B1 EP 13792886 A EP13792886 A EP 13792886A EP 2919915 B1 EP2919915 B1 EP 2919915B1
Authority
EP
European Patent Office
Prior art keywords
water
orifice
solid particles
hydrocyclones
hydrocyclone
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP13792886.7A
Other languages
German (de)
French (fr)
Other versions
EP2919915A1 (en
Inventor
Stefan Chirtu
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Individual
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Individual
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Filing date
Publication date
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Publication of EP2919915A1 publication Critical patent/EP2919915A1/en
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Publication of EP2919915B1 publication Critical patent/EP2919915B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C5/00—Apparatus in which the axial direction of the vortex is reversed
    • B04C5/24—Multiple arrangement thereof
    • B04C5/28—Multiple arrangement thereof for parallel flow
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C11/00—Accessories, e.g. safety or control devices, not otherwise provided for, e.g. regulators, valves in inlet or overflow ducting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C5/00—Apparatus in which the axial direction of the vortex is reversed
    • B04C5/02—Construction of inlets by which the vortex flow is generated, e.g. tangential admission, the fluid flow being forced to follow a downward path by spirally wound bulkheads, or with slightly downwardly-directed tangential admission
    • B04C5/04—Tangential inlets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C9/00—Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H4/00—Swimming or splash baths or pools
    • E04H4/12—Devices or arrangements for circulating water, i.e. devices for removal of polluted water, cleaning baths or for water treatment
    • E04H4/1209—Treatment of water for swimming pools
    • E04H4/1245—Recirculating pumps for swimming pool water
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C9/00—Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks
    • B04C2009/005—Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks with external rotors, e.g. impeller, ventilator, fan, blower, pump

Definitions

  • the invention relates to a pool water filtration device.
  • Hydrocyclones have a frustoconical shape and use centrifugal force to separate solid particles from water.
  • Frustoconical shape here means a shape having a frustoconical portion and optionally a cylindrical portion.
  • the water is introduced into each hydrocyclone through a tangential inlet, which imparts to it a rotational movement, which generates the centrifugal force. This centrifugal force separates the solid particles from the water and the plates along the wall of the cone. The solid particles are then dragged down the hydrocyclone. The water, freed of its solid particles, rises to the top of the hydrocyclone.
  • Such devices are for example described in the patent application WO2008155649 . They require the use of a pump to introduce water into the hydrocyclones, thus pipes connecting the pump to the device. Most often, the pump is placed in a tank or technical room, located near the pool. The entire pump and the filtering device therefore occupies an important place. In addition, the pressure drops are important in the pipes connecting the pump to the device.
  • the invention aims to remedy these disadvantages by proposing a more compact device, requiring no technical room, and having fewer losses.
  • the device above is a compact assembly and does not require a room or technical tank for the pump.
  • the hydrocyclones being distributed in a circle around the centrifugal turbine, the pressure losses are lower and identical for each of the hydrocyclones, which implies the use of a less powerful motor, so a reduced power consumption.
  • Embodiments of this device may include one or more of the features of the dependent claims.
  • the figure 1 and the following ones are all oriented according to the same orthogonal reference XYZ.
  • the X and Y directions here are horizontal, and the Z direction is the vertical direction.
  • the figure 1 represents a filtration device 2. Arrows indicate the flow direction of the water in the device.
  • the device 2 here comprises a housing 4 waterproof.
  • the housing is rigid plastic or metal.
  • the casing 4 here has a cylindrical shape, of circular section. More specifically, the housing 4 comprises a cylinder which extends along the Z axis, and two disks, respectively lower and upper, located in planes parallel to the XY plane at the ends of the cylinder. The cylinder and the upper and lower discs delimit an interior cavity devoid of water.
  • the housing 4 has the following dimensions: its diameter is less than 80 cm, and preferably less than 60 cm, or 50 cm.
  • the height of the housing 4 in the Z direction is less than 70 cm, and preferably less than 60 cm, or 50 cm.
  • the casing 4 comprises a suction port 6 for the water from the pool.
  • the orifice 6 has, here, a circular shape whose diameter is greater than 3 cm, and preferably greater than 4 cm, or 5 cm. Typically, this diameter is less than 30 cm.
  • the orifice 6 is on the upper disk of the casing 4, here at its center.
  • the casing 4 When using the device 2, the casing 4 is immersed in the pool, slightly below the free surface of the water, so that the orifice 6 is, for example, 3 or 4 cm below the surface of the water.
  • the casing 4 can also be placed near the pool, outside the water.
  • the orifice 6 is fluidly connected to the pool water by a suction mouth not shown.
  • this suction mouth is shaped similarly to a collector or skimmer, better known by the term "skimmer".
  • the device 2 comprises a pump 8 whose function is to suck water from the pool.
  • the pump 8 is housed inside the casing 4.
  • the pump 8 is fluidly connected to the orifice 6 by a duct 10.
  • the duct 10 here has a frustoconical shape, and has two ends 12 and 14.
  • the duct 10 comprises a central axis oriented along the axis Z.
  • the two ends 12 and 14 extend in planes parallel to the XY plane, and have circular sections of different diameters.
  • the end 12 has a diameter equal to that of the orifice 6, and it is directly connected to the orifice 6.
  • the end 14 has a diameter smaller than that of the end 12, and it is directly connected to the pump 8.
  • the frustoconical shape of the duct thus arranged creates a vortex in the duct, which increases the flow of water entering the pump 8.
  • the pump 8 comprises a centrifugal turbine 16 and a motor 18.
  • the motor 18 is a low voltage electric motor, coupled to the turbine 16, so as to drive the turbine 16 in rotation.
  • the motor 18 is powered by a power supply cord, not shown in the figure, which connects the motor 18 to a power supply external to the casing 4.
  • the power of the motor is less than 2 kW, or preferably, less than 1.5 kW.
  • the start and stop of the motor 18 are here controlled by an electronic control unit 22, housed inside the housing 4. When the motor 8 is running, its rotation speed is here constant.
  • the centrifugal turbine 16 comprises a vertical axis of rotation, here coinciding with the generatrix of the cylinder of the casing 4. The motor is placed along the axis 20, below the turbine 16.
  • the end 14 of the duct 10 is connected fluidly to the turbine 16.
  • the turbine 16 sucks the water which opens out of the conduit 10 vertically and drives it, thanks to its rotational movement, in a horizontal plane.
  • the centrifugal turbine 16 here has a wheel shape. It is described in more detail with reference to figures 2 and 3 .
  • the water discharged by the turbine 16 opens into a distributor 24.
  • the distributor 24 has a plurality of distribution channels extending in a horizontal plane. The distributor 24, and its association with the turbine 16, are described in more detail with reference to the figures 4 and 5 .
  • the distribution channels of the distributor 24 open each inside a hydrocyclone 26, tangentially to the wall of the hydrocyclone.
  • the device 2 here comprises seven hydrocyclones 26, all identical.
  • the hydrocyclones 26 are housed inside the housing 4.
  • the hydrocyclones 26 extend essentially along a vertical axis and are arranged in a circle around the turbine 16.
  • the upper ends of the hydrocyclones 26 are in the same horizontal plane as the distributor 24.
  • the hydrocyclones 26 delimit an essentially cylindrical interior space 28 which extends along a vertical central axis coinciding with the axis of rotation 20.
  • the pump 8 is housed inside the space 28.
  • the shape and operation of the hydrocyclones 26 are described in more detail with reference to the figure 6 .
  • the water separated from its solid particles in the hydrocyclones 26 is discharged into the upper part of the hydrocyclones at the outlet nozzles 30, all identical.
  • Each hydrocyclone 26 has a nozzle 30. All the nozzles 30 open into a conduit 32, connected to a delivery port 34 of the filtered water.
  • the orifice 34 is arranged in the wall of the casing 4 and allows to discharge the filtered water in the pool. Here, the orifice 34 is on the cylindrical part of the casing 4, more than 10 cm, from the upper disc of the casing 4.
  • the actuator moves the valve, in response to a command from the electronic unit 22, from its open position to its closed position or vice versa.
  • the sensor 38 transmits a measurement signal representative of the quantity of solid particles present in the reservoir 36 to the electronic unit 22.
  • the unit 22 automatically controls an opening of the solenoid valve 42 if the transmitted measurement signal exceeds a predetermined threshold , which has been programmed.
  • the figure 2 is a perspective view of the centrifugal turbine 16.
  • the turbine 16 has a solid lower disk 50, centered on the axis of rotation 20.
  • the disk 50 extends in a horizontal plane.
  • the diameter of the disc 50 is less than 12 cm, and preferably less than 10 cm, or 9 cm.
  • the turbine 16 also includes an upper disk 52.
  • the disk 52 has a diameter identical to that of the disk 50 and extends in a plane also horizontal.
  • the disk 52 comprises a circular orifice 54 at its center.
  • the orifice 54 is placed opposite and close to the end 14 of the duct 10.
  • the turbine 16 here comprises seven vanes 56 arranged between the two disks 50 and 52.
  • the vanes 56 are all identical and spaced regularly from each other. On the figure 3 these vanes are visible by transparency through the disk 52.
  • the height of the vanes 56 measured along the Z axis, is equal to the distance separating the two disks 50 and 52.
  • the height of the vanes is between 12 and 20 mm, and preferably between 15 and 18 mm.
  • the height of the turbine 16 along the Z axis corresponds to the height of the blades, added to the thickness along Z of the two disks 50 and 52.
  • the figure 3 shows in greater detail the blades 56 in section along a horizontal plane.
  • An arrow F indicates the direction of rotation of the turbine 16, here in the direction of clockwise.
  • Each blade 56 extends along a non-rectilinear curve that has no point of inflection. Given the thickness of the blades 56, each blade 56 is delimited by two curves 58 and 60 parallel, non-rectilinear and having no point of inflection.
  • Each curve 58, 60 extends from a point A which lies on an inner circle 62 centered on the axis 20, to a point B which is on an outer circle 64, centered on the same axis.
  • the circle 64 coincides with the outer circle delimiting the disc 50.
  • the circle 62 has a diameter greater than or equal to that of the orifice 54.
  • the angle ⁇ between the tangential vector 66 to the curve 60 and the tangent vector 68 to the circle 62 oriented in the opposite direction of rotation of the turbine 16 is between 0 ° and 50 °, and preferably between 0 ° and 40 °.
  • the angle ⁇ is approximately equal to 25 °.
  • Vector 66 is oriented in the direction of flow of water.
  • the angle ⁇ between the tangent vector 70 at the curve 60 and the tangent vector 72 at the circle 64 is between 0 ° and 45 °, and preferably between 0 ° and 30 °, or between 0 ° and 20 °.
  • the two vectors 70 and 72 are oriented in the direction of rotation of the turbine 16.
  • the figure 4 represents in more detail the distributor 24.
  • the distributor 24 serves to guide and accelerate the water to the hydrocyclones 26, while minimizing the losses, and to introduce the water tangentially to the wall of the hydrocyclones 26, with a maximum speed.
  • the distributor 24 has a circular shape that extends in a horizontal plane, and whose height in the Z direction is equal to the height of the turbine 16.
  • the distributor 24 has a central circular housing 80, over its entire height.
  • the turbine 16 is housed inside the housing 80.
  • the diameter of the housing 80 is slightly greater than that of the turbine 16. For example, the clearance between the periphery of the discs 50, 52 and the vertical wall of the housing 80 is less than at 2 mm or 1 mm.
  • the dispenser 24 is fixed.
  • the diameter of the distributor 24 is such that the distributor 24 includes all the upper parts of the hydrocyclones 26, arranged in a circle about the axis 20.
  • the outer circle defining the distributor 24 is less than 5 cm, and preferably less than 3 cm, or 2 cm from the point of the wall of the hydrocyclones 26 farthest from the axis 20.
  • the distributor 24 has a circular orifice by hydrocyclone 26, so that the upper part each hydrocyclone 26 is housed inside the corresponding orifice.
  • the distributor 24 comprises a distribution channel 82 by hydrocyclone 26.
  • the distribution channels 82 here all identical and regularly distributed on the periphery of the housing 80, are therefore seven in number. A single channel 82 is described below.
  • the distributor 24 recovers the water discharged by the turbine 16 into the distribution channels 82 to introduce it inside each hydrocyclone 26, tangentially to the wall of the hydrocyclone 26.
  • Each channel 82 has an inlet port 84 formed in the housing 80, and an outlet port 86, in the wall of a hydrocyclone 26.
  • Two consecutive inlet ports 84 are separated, in a horizontal plane, by an arc 85 defining the housing 80.
  • the angular value of the circular arcs 85, all identical, is preferably less than 20 °, or even 5 °.
  • the inlet ports 84 have a rectangular shape.
  • Each channel 82 extends in a horizontal plane, and the cross section of each channel 82 in this horizontal plane is delimited, on either side, by two curves 88 and 90.
  • These curves 88, 90 correspond to the intersection between the vertical walls of the channel 82 and the horizontal plane.
  • the two curves 88 and 90 are not rectilinear, and have no point of inflection, in order to limit the pressure losses of the water flowing inside the channel 82.
  • the two curves 88 and 90 are progressively closer to each other as one moves from the orifice 84 to the orifice 86.
  • the speed of the water at the outlet of the channel 82 is greater than the speed of the water at the inlet of the channel 82.
  • the centrifugal force in the hydrocyclone 26 will therefore be greater and the separation of the particles higher quality solids.
  • the walls of the channel 82 are smooth in order to limit the friction of the water against the walls and to minimize the pressure losses.
  • Each channel 82 opens into a hydrocyclone 26 at the orifice 86.
  • the curve 90 is tangent to the wall of the hydrocyclone 26, at the orifice 86.
  • the intersection of the curve 90 with the vertical wall of the housing 80 is shown in more detail on the figure 5 .
  • the periphery of the housing 80 is represented by a circle 91.
  • An arrow F indicates the direction of rotation of the turbine 16 inside the central housing 80, here, in the direction of clockwise.
  • Curve 90 intersects circle 91 at point C.
  • the angle ⁇ between a tangent vector 92 at curve 90 at point C and a tangent vector 94 at C at circle 91 is between 0 ° and 45 °. and preferably between 0 ° and 30 °, or between 0 ° and 20 °.
  • the angle ⁇ is chosen equal to the angle ⁇ ( figure 3 ) within +/- 20% or within 10%.
  • the two vectors 92 and 94 are oriented in the direction of flow of the water.
  • the figure 6 represents, in section, the half-hydrocyclone 26.
  • the hydrocyclones 26 are symmetrical with respect to a vertical axis, one half of a hydrocyclone 26 is thus represented only.
  • the hydrocyclone 26 conventionally comprises a cylindrical upper portion 100 of circular section, and below, a cone 102 whose section in a horizontal plane decreases away from the upper part 100. Below the cone 102, lies a collection end 104 of the solid particles separated from the water. This end 104 is cylindrical of circular section, equal to the section of the lower end of the cone 102.
  • the hydrocyclone 26 comprises in the part 100 a water inlet port, which corresponds to the outlet port 86 distribution channel 82 opening tangentially inside this hydrocyclone 26.
  • the orifice 86 has a rectangular section in a vertical plane. Here, the orifice 86 adjoins the upper end of the hydrocyclone 26.
  • the hydrocyclone 26 also comprises an outlet nozzle 30, through which the filtered water leaves.
  • the nozzle 30 is in the center of the cylindrical portion 100, it has a section in a horizontal plane, circular. One end of the nozzle 30 is inside the cylindrical portion 100. The other end is fluidly connected to the conduit 32.
  • the water is introduced into the hydrocyclone 26 through the tangential inlet orifice 86, which gives it a rotational movement, which generates the centrifugal force.
  • This centrifugal force separates water from particles that are denser than water.
  • the particles that are denser than the water fall into the collection end 104.
  • the solenoid valve 112 is identical to the solenoid valve 42.
  • the device 110 here comprises a sensor 114 placed on the outside of a hydrocyclone 26 and against a wall of the collection end 104.
  • the sensor 114 transmits a measurement signal representative of the quantity of solid particles present in the end at the electronic unit 22.
  • the sensor 114 is an optical sensor.
  • the wall of the collection end 104 is transparent to light.
  • the number of hydrocyclones may be different from seven. However, the number of hydrocyclones is greater than three or four, and preferably greater than eight or ten.
  • hydrocyclones may not all be identical.
  • a hydrocyclone is smaller than the others.
  • the number of blades in the turbine may be different from the number of hydrocyclones.
  • the number of blades is less than the number of hydrocyclones.
  • the number of bladders can also be greater than the number of hydrocyclones.
  • the number of distribution channels of the dispenser may be greater than the number of hydrocyclones. In this case, more than one distribution channel opens in the same hydrocyclone.
  • the centrifugal turbine may be different from a wheel. For example, it is replaced by a helix.
  • the filtration device may comprise a sieve, placed upstream of the pump, which pre-filters the larger solid particles.
  • the circle 64 of the turbine may have a smaller diameter than the disk 50. In this case, the blades do not reach the contour of the disk 50.
  • the turbine may not have an upper disk 52.
  • the blades 56 may be in three dimensions, that is to say that the curves in which each blade 48 extends in different horizontal section planes are different.
  • the electronic unit 22 can be outside the housing 4.
  • the reservoir 36 may not be connected at all to the sewer or to a lost well. In this case, the device requires regular manual emptying of the tank 36.
  • the device 110 may comprise a sensor 114 by collecting end 104.
  • the electronic unit 22 can control each solenoid valve 112 independently of the others, or all the solenoid valves 112 at the same time.
  • the solenoid valve 42 or 112 is replaced by a manual valve.
  • the solenoid valves 42 and 112 are omitted.
  • the actuator of the solenoid valves 42 or 112 may be a motor.
  • the sensor 38 may be replaced by an optical sensor, placed next to the reservoir 36. In this case, the wall of the reservoir 36 must be transparent to the light. Similarly, the sensor 114 may be a piezoelectric sensor, placed in the collection end 104. Alternatively, the sensor 38 or 114 is omitted. In this case, the unit 22 is programmed to control the opening of the solenoid valves 42 or 112 at regular intervals.
  • the device may comprise a reservoir per hydrocyclone, and not a single common reservoir.
  • the reservoir 36 is omitted.
  • the collection ends 104 are each directly directly connected to the orifice 40.
  • the hydrocyclones can be inclined with respect to a vertical axis.
  • the housing may not be cylindrical. For example, it can have a cubic form.
  • the speed of the engine 18 may be variable.
  • the set of devices 2 or 110 may not be placed in a housing 4.
  • each element of the device is itself waterproof.
  • the electronic control unit 22 can be placed inside or outside the housing.
  • the angle ⁇ between 0 ° and 45 ° can also be the angle between the tangent to the curve 88 and the tangent to the circle 91, at the point of intersection of the curve 88 and the circle 91. This property of the angle ⁇ can also relate to the two curves 88 and 90.
  • the solenoid valves 42, 112 and the control unit 22 for these solenoid valves can be implemented independently of the presence or absence of the pump 8 inside the casing 4.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Water Supply & Treatment (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Cyclones (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Description

L'invention concerne un dispositif de filtration d'eau de piscine.The invention relates to a pool water filtration device.

Des dispositifs de filtration connus comportent:

  • au moins deux orifices respectivement d'aspiration de l'eau et de refoulement de l'eau filtrée,
  • au moins trois hydrocyclones, formant chacun un filtre cyclonique apte à séparer l'eau des particules solides contenues dans cette eau, ces hydrocyclones étant disposés en cercle pour délimiter un espace intérieur essentiellement cylindrique qui s'étend le long d'un axe central.
Known filtration devices include:
  • at least two orifices respectively for sucking water and for discharging the filtered water,
  • at least three hydrocyclones, each forming a cyclonic filter capable of separating the water from the solid particles contained in this water, these hydrocyclones being arranged in a circle to delimit a substantially cylindrical interior space which extends along a central axis.

Les hydrocyclones ont une forme tronconique et utilisent la force centrifuge pour séparer les particules solides de l'eau. Par forme tronconique, on entend ici une forme ayant une partie tronconique et éventuellement une partie cylindrique. L'eau est introduite dans chaque hydrocyclone par un orifice d'entrée tangentiel, ce qui lui communique un mouvement de rotation, lequel engendre la force centrifuge. Cette force centrifuge sépare les particules solides de l'eau et les plaque le long de la paroi du cône. Les particules solides sont alors entraînées vers le bas de l'hydrocyclone. L'eau, débarrassée de ses particules solides, remonte vers le haut de l'hydrocyclone.Hydrocyclones have a frustoconical shape and use centrifugal force to separate solid particles from water. Frustoconical shape here means a shape having a frustoconical portion and optionally a cylindrical portion. The water is introduced into each hydrocyclone through a tangential inlet, which imparts to it a rotational movement, which generates the centrifugal force. This centrifugal force separates the solid particles from the water and the plates along the wall of the cone. The solid particles are then dragged down the hydrocyclone. The water, freed of its solid particles, rises to the top of the hydrocyclone.

De tels dispositifs sont par exemple décrits dans la demande de brevet WO2008155649 . Ils nécessitent l'utilisation d'une pompe pour introduire l'eau dans les hydrocyclones, donc des tuyaux reliant la pompe au dispositif. Le plus souvent, la pompe est placée dans un bac ou local technique, situé à proximité de la piscine. L'ensemble de la pompe et du dispositif de filtration occupe donc une place importante. De plus, les pertes de charges sont importantes dans les tuyaux reliant la pompe au dispositif.Such devices are for example described in the patent application WO2008155649 . They require the use of a pump to introduce water into the hydrocyclones, thus pipes connecting the pump to the device. Most often, the pump is placed in a tank or technical room, located near the pool. The entire pump and the filtering device therefore occupies an important place. In addition, the pressure drops are important in the pipes connecting the pump to the device.

De l'état de la technique est également connu de : DE19849870A1 , WO2004026486A1 , DE3539483A1 et WO2008155649A1 .From the state of the art is also known from: DE19849870A1 , WO2004026486A1 , DE3539483A1 and WO2008155649A1 .

L'invention vise à remédier à ces inconvénients en proposant un dispositif plus compact, ne nécessitant pas de local technique, et présentant moins de pertes de charges.The invention aims to remedy these disadvantages by proposing a more compact device, requiring no technical room, and having fewer losses.

Elle a donc pour objet un dispositif de filtration conforme à la revendication 1.It therefore relates to a filter device according to claim 1.

Le dispositif ci-dessus est un ensemble compact et ne nécessite pas de local ou bac technique pour la pompe. De plus, les hydrocyclones étant répartis en cercle autour de la turbine centrifuge, les pertes de charges sont plus faibles et identiques pour chacun des hydrocyclones, ce qui implique l'utilisation d'un moteur moins puissant, donc une consommation d'électricité réduite.The device above is a compact assembly and does not require a room or technical tank for the pump. In addition, the hydrocyclones being distributed in a circle around the centrifugal turbine, the pressure losses are lower and identical for each of the hydrocyclones, which implies the use of a less powerful motor, so a reduced power consumption.

Les modes de réalisation de ce dispositif peuvent comporter une ou plusieurs des caractéristiques des revendications dépendantes.Embodiments of this device may include one or more of the features of the dependent claims.

Ces modes de réalisation du dispositif présentent en outre les avantages suivants:

  • la présence d'un carter regroupant tous les éléments nécessaires à l'aspiration, filtration et évacuation de l'eau permet d'avoir un bloc très compact;
  • l'électrovanne entre l'extrémité de collecte d'un hydrocyclone et le réservoir permet de récupérer automatiquement les particules solides dans le réservoir afin d'éviter l'engorgement des hydrocyclones;
  • l'électrovanne située entre l'extrémité de collecte et un orifice d'évacuation des particules solides en dehors du carter permet de limiter la maintenance, car l'évacuation des particules solides se fait de manière automatique;
  • la présence d'un capteur de particules permet d'optimiser la maintenance du dispositif en ouvrant automatiquement l'électrovanne uniquement lorsque c'est nécessaire, ce qui facilite l'entretien du dispositif;
  • un conduit tronconique raccordant la pompe à l'orifice d'aspiration crée un vortex, ce qui augmente le débit de l'eau entrant dans la pompe et la vitesse des particules solides;
  • une turbine centrifuge comportant les caractéristiques décrites ci-dessus et placée entre l'orifice d'aspiration et les hydrocyclones limite les pertes de charges de l'eau circulant dans la pompe;
  • le rapprochement des deux courbes délimitant chaque canal de distribution vers l'orifice de sortie permet une augmentation de la vitesse de l'eau circulant dans chaque canal, l'eau arrive ainsi à l'entrée de l'hydrocyclone à une vitesse plus élevée qu'à l'entrée dans le canal de distribution, ce qui permet ensuite une meilleure séparation des particules solides dans l'hydrocyclone;
  • des canaux de distribution présentant la caractéristique décrite ci-dessus relativement à leur tangente au niveau de l'orifice d'entrée contribuent à limiter les pertes de charges lors de la circulation de l'eau de la turbine centrifuge vers le distributeur, en minimisant les chocs de l'eau contre les parois des canaux;
  • la présence d'au moins sept hydrocyclones garantit une séparation des particules solides satisfaisante pour un débit d'eau important;
  • les hydrocyclones tous identiques garantissent une séparation des particules solides de l'eau identique quel que soit l'hydrocyclone vers lequel elle a été dirigée, donc une homogénéité de l'eau récupérée à la sortie des hydrocyclones.
These embodiments of the device also have the following advantages:
  • the presence of a casing grouping all the elements necessary for the suction, filtration and evacuation of the water makes it possible to have a very compact block;
  • the solenoid valve between the collection end of a hydrocyclone and the reservoir makes it possible to automatically recover the solid particles in the reservoir in order to avoid clogging of the hydrocyclones;
  • the solenoid valve located between the collection end and a solid particles evacuation port outside the casing makes it possible to limit the maintenance, since the evacuation of the solid particles is done automatically;
  • the presence of a particle sensor optimizes the maintenance of the device by automatically opening the solenoid valve only when necessary, which facilitates the maintenance of the device;
  • a frustoconical duct connecting the pump to the suction port creates a vortex, which increases the flow of water entering the pump and the speed of the solid particles;
  • a centrifugal turbine having the characteristics described above and placed between the suction port and the hydrocyclones limits the pressure losses of the water flowing in the pump;
  • the bringing together of the two curves delimiting each distribution channel towards the outlet orifice makes it possible to increase the speed of the water flowing in each channel, the water thus arriving at the inlet of the hydrocyclone at a higher speed than at the entrance to the distribution channel, which then allows better separation of the solid particles in the hydrocyclone;
  • distribution channels having the characteristic described above relative to their tangent at the inlet orifice contribute to limiting the pressure drops during the flow of water from the centrifugal turbine to the distributor, minimizing the water shocks against the walls of the canals;
  • the presence of at least seven hydrocyclones ensures a separation of solid particles satisfactory for a large flow of water;
  • the hydrocyclones all identical ensure a separation of the solid particles of the same water regardless of the hydrocyclone to which it was directed, thus a homogeneity of the water recovered at the outlet of the hydrocyclones.

L'invention sera mieux comprise à la lecture de la description qui va suivre, donnée uniquement à titre d'exemple non limitatif et faite en se référant aux dessins sur lesquels :

  • la figure 1 est un schéma de principe, en coupe verticale, d'un dispositif de filtration d'eau de piscine,
  • la figure 2 est une vue en perspective d'une turbine centrifuge du dispositif de la figure 1,
  • la figure 3 est une vue schématique et en coupe horizontale de la turbine de la figure 2,
  • la figure 4 est une illustration schématique, en perspective, d'un distributeur du dispositif de la figure 1,
  • la figure 5 est une illustration schématique d'un canal de distribution, au niveau de l'orifice d'entrée, du distributeur de la figure 4,
  • la figure 6 est une illustration schématique et en coupe verticale d'un demi-hydrocyclone du dispositif de la figure 1,
  • la figure 7 est un schéma de principe, en coupe verticale, d'un autre mode de réalisation d'un dispositif de filtration d'eau de piscine.
The invention will be better understood on reading the description which follows, given solely by way of nonlimiting example and with reference to the drawings in which:
  • the figure 1 is a schematic diagram, in vertical section, of a pool water filtration device,
  • the figure 2 is a perspective view of a centrifugal turbine of the device of the figure 1 ,
  • the figure 3 is a schematic view in horizontal section of the turbine of the figure 2 ,
  • the figure 4 is a schematic illustration, in perspective, of a distributor of the device of the figure 1 ,
  • the figure 5 is a schematic illustration of a distribution channel, at the inlet orifice, of the distributor of the figure 4 ,
  • the figure 6 is a schematic illustration and in vertical section of a half-hydrocyclone of the device of the figure 1 ,
  • the figure 7 is a schematic diagram, in vertical section, of another embodiment of a pool water filtration device.

Dans ces figures, les mêmes références sont utilisées pour désigner les mêmes éléments.In these figures, the same references are used to designate the same elements.

Dans la suite de cette description, les caractéristiques et fonctions bien connues de l'homme du métier ne sont pas décrites en détails.In the rest of this description, the features and functions well known to those skilled in the art are not described in detail.

La figure 1 et les suivantes sont toutes orientées selon un même repère orthogonal XYZ. Les directions X et Y sont ici horizontales, et la direction Z est la direction verticale. Les termes "supérieur" et "inférieur", "en-dessus" et "en-dessous" utilisés par la suite s'entendent dans la direction Z.The figure 1 and the following ones are all oriented according to the same orthogonal reference XYZ. The X and Y directions here are horizontal, and the Z direction is the vertical direction. The terms "upper" and "lower", "above" and "below" used thereafter mean in the Z direction.

La figure 1 représente un dispositif de filtration 2. Des flèches indiquent le sens de circulation de l'eau dans le dispositif.The figure 1 represents a filtration device 2. Arrows indicate the flow direction of the water in the device.

Le dispositif 2 comporte ici un carter 4 étanche à l'eau. Par exemple, le carter est en plastique rigide ou en métal. Le carter 4 a ici une forme cylindrique, de section circulaire. Plus précisément, le carter 4 comporte un cylindre qui s'étend selon l'axe Z, et deux disques, respectivement inférieur et supérieur, situés dans des plans parallèles au plan XY, aux extrémités du cylindre. Le cylindre et les disques supérieur et inférieur délimitent une cavité intérieure dépourvue d'eau. Le carter 4 a les dimensions suivantes: son diamètre est inférieur à 80 cm, et, de préférence, inférieur à 60 cm, ou à 50 cm. La hauteur du carter 4 selon la direction Z est inférieure à 70 cm, et, de préférence, inférieure à 60 cm, ou à 50 cm.The device 2 here comprises a housing 4 waterproof. For example, the housing is rigid plastic or metal. The casing 4 here has a cylindrical shape, of circular section. More specifically, the housing 4 comprises a cylinder which extends along the Z axis, and two disks, respectively lower and upper, located in planes parallel to the XY plane at the ends of the cylinder. The cylinder and the upper and lower discs delimit an interior cavity devoid of water. The housing 4 has the following dimensions: its diameter is less than 80 cm, and preferably less than 60 cm, or 50 cm. The height of the housing 4 in the Z direction is less than 70 cm, and preferably less than 60 cm, or 50 cm.

Le carter 4 comporte un orifice 6 d'aspiration de l'eau de la piscine. L'orifice 6 a, ici, une forme circulaire dont le diamètre est supérieur à 3 cm, et, de préférence, supérieur à 4 cm, ou à 5 cm. Typiquement, ce diamètre est inférieur à 30 cm. L'orifice 6 se trouve sur le disque supérieur du carter 4, ici, en son centre.The casing 4 comprises a suction port 6 for the water from the pool. The orifice 6 has, here, a circular shape whose diameter is greater than 3 cm, and preferably greater than 4 cm, or 5 cm. Typically, this diameter is less than 30 cm. The orifice 6 is on the upper disk of the casing 4, here at its center.

Lors de l'utilisation du dispositif 2, le carter 4 est immergé dans la piscine, légèrement en-dessous de la surface libre de l'eau, de manière à ce que l'orifice 6 soit, par exemple, à 3 ou 4 cm en-dessous de la surface de l'eau. Le carter 4 peut aussi être placé à proximité de la piscine, en dehors de l'eau. Dans ce cas, l'orifice 6 est fluidiquement raccordé à l'eau de la piscine par une bouche d'aspiration non représentée. Par exemple, cette bouche d'aspiration est conformée de façon similaire à un récupérateur ou écumeur, plus connu sous le terme anglais de « skimmer ».When using the device 2, the casing 4 is immersed in the pool, slightly below the free surface of the water, so that the orifice 6 is, for example, 3 or 4 cm below the surface of the water. The casing 4 can also be placed near the pool, outside the water. In this case, the orifice 6 is fluidly connected to the pool water by a suction mouth not shown. For example, this suction mouth is shaped similarly to a collector or skimmer, better known by the term "skimmer".

Le dispositif 2 comprend une pompe 8 qui a pour fonction d'aspirer l'eau de la piscine. La pompe 8 est logée à l'intérieur du carter 4. La pompe 8 est fluidiquement raccordée à l'orifice 6 par un conduit 10. Le conduit 10 a ici une forme tronconique, et comporte deux extrémités 12 et 14. Le conduit 10 comporte un axe central orienté selon l'axe Z. Les deux extrémités 12 et 14 s'étendent dans des plans parallèles au plan XY, et ont des sections circulaires de diamètres différents. L'extrémité 12 a un diamètre égal à celui de l'orifice 6, et elle est directement raccordée à l'orifice 6. L'extrémité 14 a un diamètre inférieur à celui de l'extrémité 12, et elle est directement raccordée à la pompe 8. La forme tronconique du conduit disposée ainsi crée un vortex dans le conduit, ce qui augmente le débit d'eau entrant dans la pompe 8.The device 2 comprises a pump 8 whose function is to suck water from the pool. The pump 8 is housed inside the casing 4. The pump 8 is fluidly connected to the orifice 6 by a duct 10. The duct 10 here has a frustoconical shape, and has two ends 12 and 14. The duct 10 comprises a central axis oriented along the axis Z. The two ends 12 and 14 extend in planes parallel to the XY plane, and have circular sections of different diameters. The end 12 has a diameter equal to that of the orifice 6, and it is directly connected to the orifice 6. The end 14 has a diameter smaller than that of the end 12, and it is directly connected to the pump 8. The frustoconical shape of the duct thus arranged creates a vortex in the duct, which increases the flow of water entering the pump 8.

La pompe 8 comporte une turbine centrifuge 16 et un moteur 18. Le moteur 18 est un moteur électrique basse tension, accouplé à la turbine 16, de manière à entraîner la turbine 16 en rotation. Le moteur 18 est alimenté par un cordon d'alimentation électrique, non représenté sur la figure, qui relie le moteur 18 à une alimentation électrique extérieure au carter 4. Par exemple, la puissance du moteur est inférieure à 2 kW, ou de préférence, inférieure à 1,5 kW. La mise en marche et l'arrêt du moteur 18 sont ici commandés par une unité électronique de commande 22, logée à l'intérieur du carter 4. Lorsque le moteur 8 est en marche, sa vitesse de rotation est ici constante. La turbine centrifuge 16 comprend un axe de rotation 20 vertical, ici confondu avec la génératrice du cylindre du carter 4. Le moteur est placé le long de l'axe 20, en-dessous de la turbine 16. L'extrémité 14 du conduit 10 est raccordée fluidiquement à la turbine 16. La turbine 16 aspire l'eau qui débouche du conduit 10 verticalement et la refoule, grâce à son mouvement de rotation, dans un plan horizontal. La turbine centrifuge 16 a ici une forme de rouet. Elle est décrite plus en détails en référence aux figures 2 et 3.The pump 8 comprises a centrifugal turbine 16 and a motor 18. The motor 18 is a low voltage electric motor, coupled to the turbine 16, so as to drive the turbine 16 in rotation. The motor 18 is powered by a power supply cord, not shown in the figure, which connects the motor 18 to a power supply external to the casing 4. For example, the power of the motor is less than 2 kW, or preferably, less than 1.5 kW. The start and stop of the motor 18 are here controlled by an electronic control unit 22, housed inside the housing 4. When the motor 8 is running, its rotation speed is here constant. The centrifugal turbine 16 comprises a vertical axis of rotation, here coinciding with the generatrix of the cylinder of the casing 4. The motor is placed along the axis 20, below the turbine 16. The end 14 of the duct 10 is connected fluidly to the turbine 16. The turbine 16 sucks the water which opens out of the conduit 10 vertically and drives it, thanks to its rotational movement, in a horizontal plane. The centrifugal turbine 16 here has a wheel shape. It is described in more detail with reference to figures 2 and 3 .

L'eau refoulée par la turbine 16 débouche dans un distributeur 24. Le distributeur 24 comporte plusieurs canaux de distribution s'étendant dans un plan horizontal. Le distributeur 24, et son association à la turbine 16, sont décrits plus en détail en référence aux figures 4 et 5.The water discharged by the turbine 16 opens into a distributor 24. The distributor 24 has a plurality of distribution channels extending in a horizontal plane. The distributor 24, and its association with the turbine 16, are described in more detail with reference to the figures 4 and 5 .

Les canaux de distribution du distributeur 24 débouchent chacun à l'intérieur d'un hydrocyclone 26, tangentiellement à la paroi de l'hydrocyclone. Le dispositif 2 comporte ici sept hydrocyclones 26, tous identiques. Les hydrocyclones 26 sont logés à l'intérieur du carter 4. Les hydrocyclones 26 s'étendent essentiellement selon un axe vertical et sont disposés en cercle autour de la turbine 16. Les extrémités supérieures des hydrocyclones 26 se trouvent dans le même plan horizontal que le distributeur 24. Les hydrocyclones 26 délimitent un espace intérieur 28 essentiellement cylindrique, qui s'étend le long d'un axe central vertical confondu avec l'axe de rotation 20. La pompe 8 est logée à l'intérieur de l'espace 28. La forme et le fonctionnement des hydrocyclones 26 sont décrits plus en détail en référence à la figure 6.The distribution channels of the distributor 24 open each inside a hydrocyclone 26, tangentially to the wall of the hydrocyclone. The device 2 here comprises seven hydrocyclones 26, all identical. The hydrocyclones 26 are housed inside the housing 4. The hydrocyclones 26 extend essentially along a vertical axis and are arranged in a circle around the turbine 16. The upper ends of the hydrocyclones 26 are in the same horizontal plane as the distributor 24. The hydrocyclones 26 delimit an essentially cylindrical interior space 28 which extends along a vertical central axis coinciding with the axis of rotation 20. The pump 8 is housed inside the space 28. The shape and operation of the hydrocyclones 26 are described in more detail with reference to the figure 6 .

L'eau séparée de ses particules solides dans les hydrocyclones 26 est refoulée dans la partie supérieure des hydrocyclones au niveau des buses de sortie 30, toutes identiques. Chaque hydrocyclone 26 comporte une buse 30. Toutes les buses 30 débouchent dans un conduit 32, raccordé à un orifice de refoulement 34 de l'eau filtrée. L'orifice 34 est aménagé dans la paroi du carter 4 et permet de refouler l'eau filtrée dans la piscine. Ici, l'orifice 34 se trouve sur la partie cylindrique du carter 4, à plus de 10 cm, du disque supérieur du carter 4.The water separated from its solid particles in the hydrocyclones 26 is discharged into the upper part of the hydrocyclones at the outlet nozzles 30, all identical. Each hydrocyclone 26 has a nozzle 30. All the nozzles 30 open into a conduit 32, connected to a delivery port 34 of the filtered water. The orifice 34 is arranged in the wall of the casing 4 and allows to discharge the filtered water in the pool. Here, the orifice 34 is on the cylindrical part of the casing 4, more than 10 cm, from the upper disc of the casing 4.

Le dispositif 2 comporte également un réservoir 36. Le réservoir 36 récupère les particules solides séparées de l'eau par les hydrocyclones 26. Il se trouve en-dessous des hydrocyclones 26, de telle sorte que la partie inférieure de chaque hydrocyclone 26 débouche dans le réservoir 36. Le réservoir 36 a une forme circulaire, qui peut être évidée en son centre. Le réservoir 36 comporte ici un capteur 38 de particules solides. Par exemple, le capteur 38 est un capteur piézoélectrique. Le réservoir 36 comporte également un orifice d'évacuation 40 des particules en dehors du carter 4. Par exemple, l'orifice d'évacuation 40 est relié au tout à l'égout par un canal non représenté ou à un puits perdu. Le fond du réservoir 36 est ici en pente jusqu'à l'orifice 40, afin de faciliter l'évacuation des particules solides par gravitation. Le dispositif 2 comporte une électrovanne commandable 42, disposée entre le réservoir 36 et l'orifice d'évacuation 40. L'électrovanne 42 comporte un clapet et un actionneur apte à actionner le clapet. Par exemple, cet actionneur est un aimant électromagnétique, de sorte que l'électrovanne est une vanne électromagnétique. Le clapet est apte à se déplacer entre:

  • une position ouverte dans laquelle les particules solides peuvent circuler du réservoir 36 jusqu'à l'orifice d'évacuation 40, et, en alternance,
  • une position fermée dans laquelle les particules solides ne peuvent pas circuler du réservoir 36 jusqu'à l'orifice d'évacuation 40.
The device 2 also comprises a reservoir 36. The reservoir 36 recovers the solid particles separated from the water by the hydrocyclones 26. It is below the hydrocyclones 26, so that the lower part of each hydrocyclone 26 opens into the hydrocyclone 26. reservoir 36. The reservoir 36 has a circular shape, which can be recessed in its center. The reservoir 36 here comprises a sensor 38 of solid particles. For example, the sensor 38 is a piezoelectric sensor. The reservoir 36 also comprises a discharge port 40 of the particles outside the casing 4. For example, the discharge port 40 is connected to the sewer via a channel not shown or to a lost well. The bottom of the reservoir 36 is here sloped to the orifice 40, to facilitate the evacuation of the solid particles by gravitation. The device 2 comprises a controllable solenoid valve 42 disposed between the reservoir 36 and the discharge orifice 40. The solenoid valve 42 comprises a valve and an actuator adapted to actuate the valve. For example, this actuator is an electromagnetic magnet, so that the solenoid valve is an electromagnetic valve. The valve is able to move between:
  • an open position in which the solid particles can flow from the tank 36 to the discharge port 40, and, alternately,
  • a closed position in which the solid particles can not flow from the tank 36 to the discharge port 40.

L'actionneur déplace le clapet, en réponse à une commande de l'unité électronique 22, de sa position ouverte à sa position fermée ou inversement.The actuator moves the valve, in response to a command from the electronic unit 22, from its open position to its closed position or vice versa.

Le capteur 38 transmet un signal de mesure représentatif de la quantité de particules solides présentes dans le réservoir 36 à l'unité électronique 22. L'unité 22 commande automatiquement une ouverture de l'électrovanne 42 si le signal de mesure transmis dépasse un seuil prédeterminé, qui a été programmé.The sensor 38 transmits a measurement signal representative of the quantity of solid particles present in the reservoir 36 to the electronic unit 22. The unit 22 automatically controls an opening of the solenoid valve 42 if the transmitted measurement signal exceeds a predetermined threshold , which has been programmed.

La figure 2 représente une vue en perspective de la turbine centrifuge 16. La turbine 16 comporte un disque inférieur plein 50, centré sur l'axe de rotation 20. Le disque 50 s'étend dans un plan horizontal. Le diamètre du disque 50 est inférieur à 12 cm, et de préférence, inférieur à 10 cm, ou encore 9 cm. Dans ce mode de réalisation, la turbine 16 comporte également un disque supérieur 52. Le disque 52 a un diamètre identique à celui du disque 50 et s'étend dans un plan également horizontal. Le disque 52 comprend un orifice circulaire 54 en son centre. L'orifice 54 est disposé en vis-à-vis et à proximité de l'extrémité 14 du conduit 10.The figure 2 is a perspective view of the centrifugal turbine 16. The turbine 16 has a solid lower disk 50, centered on the axis of rotation 20. The disk 50 extends in a horizontal plane. The diameter of the disc 50 is less than 12 cm, and preferably less than 10 cm, or 9 cm. In this embodiment, the turbine 16 also includes an upper disk 52. The disk 52 has a diameter identical to that of the disk 50 and extends in a plane also horizontal. The disk 52 comprises a circular orifice 54 at its center. The orifice 54 is placed opposite and close to the end 14 of the duct 10.

La turbine 16 comporte ici sept aubages 56 disposés entre les deux disques 50 et 52. Ici, les aubages 56 sont tous identiques et espacés régulièrement les uns des autres. Sur la figure 3, ces aubages sont visibles par transparence à travers le disque 52. La hauteur des aubages 56, mesurée selon l'axe Z, est égale à la distance qui sépare les deux disques 50 et 52. Ici, par exemple, la hauteur des aubages est comprise entre 12 et 20 mm, et de préférence entre 15 et 18 mm. La hauteur de la turbine 16 selon l'axe Z correspond à la hauteur des aubages, additionnée à l'épaisseur selon Z des deux disques 50 et 52.The turbine 16 here comprises seven vanes 56 arranged between the two disks 50 and 52. Here, the vanes 56 are all identical and spaced regularly from each other. On the figure 3 these vanes are visible by transparency through the disk 52. The height of the vanes 56, measured along the Z axis, is equal to the distance separating the two disks 50 and 52. Here, for example, the height of the vanes is between 12 and 20 mm, and preferably between 15 and 18 mm. The height of the turbine 16 along the Z axis corresponds to the height of the blades, added to the thickness along Z of the two disks 50 and 52.

La figure 3 représente plus en détail les aubages 56 en coupe selon un plan horizontal. Une flèche F indique le sens de rotation de la turbine 16, ici dans le sens des aiguilles d'une montre. Chaque aubage 56 s'étend selon une courbe non rectiligne qui ne présente aucun point d'inflexion. Compte-tenu de l'épaisseur des aubages 56, chaque aubage 56 est délimité par deux courbes 58 et 60 parallèles, non rectilignes et ne présentant aucun point d'inflexion. Chaque courbe 58, 60 s'étend d'un point A qui se trouve sur un cercle intérieur 62 centré sur l'axe 20, jusqu'à un point B qui se trouve sur un cercle extérieur 64, centré sur le même axe. Ici, le cercle 64 est confondu avec le cercle extérieur délimitant le disque 50. Le cercle 62 a un diamètre supérieur ou égal à celui de l'orifice 54.The figure 3 shows in greater detail the blades 56 in section along a horizontal plane. An arrow F indicates the direction of rotation of the turbine 16, here in the direction of clockwise. Each blade 56 extends along a non-rectilinear curve that has no point of inflection. Given the thickness of the blades 56, each blade 56 is delimited by two curves 58 and 60 parallel, non-rectilinear and having no point of inflection. Each curve 58, 60 extends from a point A which lies on an inner circle 62 centered on the axis 20, to a point B which is on an outer circle 64, centered on the same axis. Here, the circle 64 coincides with the outer circle delimiting the disc 50. The circle 62 has a diameter greater than or equal to that of the orifice 54.

Les tangentes des courbes 58 et 60 aux points d'intersection respectivement A et B avec les cercles 62 et 64 comportent les caractéristiques ci-dessous. Pour simplifier la figure, seules les tangentes à une courbe 60 en A et B sont représentées.The tangents of the curves 58 and 60 at the points of intersection respectively A and B with the circles 62 and 64 have the characteristics below. To simplify the figure, only the tangents to a curve 60 in A and B are shown.

En A, l'angle α entre le vecteur tangent 66 à la courbe 60 et le vecteur tangent 68 au cercle 62 orienté selon le sens inverse de rotation de la turbine 16, est compris entre 0° et 50°, et, de préférence entre 0° et 40°. Ici, par exemple, l'angle α est environ égal à 25°. Le vecteur 66 est orienté dans le sens d'écoulement de l'eau.In A, the angle α between the tangential vector 66 to the curve 60 and the tangent vector 68 to the circle 62 oriented in the opposite direction of rotation of the turbine 16 is between 0 ° and 50 °, and preferably between 0 ° and 40 °. Here, for example, the angle α is approximately equal to 25 °. Vector 66 is oriented in the direction of flow of water.

En B, l'angle β entre le vecteur tangent 70 à la courbe 60 et le vecteur tangent 72 au cercle 64, est compris entre 0° et 45°, et de préférence, entre 0° et 30°, ou entre 0° et 20°. Les deux vecteurs 70 et 72 sont orientés dans le sens de rotation de la turbine 16.In B, the angle β between the tangent vector 70 at the curve 60 and the tangent vector 72 at the circle 64 is between 0 ° and 45 °, and preferably between 0 ° and 30 °, or between 0 ° and 20 °. The two vectors 70 and 72 are oriented in the direction of rotation of the turbine 16.

La figure 4 représente plus en détail le distributeur 24.The figure 4 represents in more detail the distributor 24.

Le distributeur 24 a pour fonctions de guider et d'accélérer l'eau jusqu'aux hydrocyclones 26, tout en minimisant les pertes de charges, et d'introduire l'eau tangentiellement à la paroi des hydrocyclones 26, avec une vitesse maximale. Le distributeur 24 a une forme circulaire qui s'étend dans un plan horizontal, et dont la hauteur dans la direction Z est égale à la hauteur de la turbine 16. Le distributeur 24 comporte un logement central 80 circulaire, sur toute sa hauteur. La turbine 16 est logée à l'intérieur du logement 80. Le diamètre du logement 80 est légèrement supérieur à celui de la turbine 16. Par exemple, le jeu entre la périphérie des disques 50, 52 et la paroi verticale du logement 80 est inférieur à 2 mm ou à 1 mm. Le distributeur 24 est fixe.The distributor 24 serves to guide and accelerate the water to the hydrocyclones 26, while minimizing the losses, and to introduce the water tangentially to the wall of the hydrocyclones 26, with a maximum speed. The distributor 24 has a circular shape that extends in a horizontal plane, and whose height in the Z direction is equal to the height of the turbine 16. The distributor 24 has a central circular housing 80, over its entire height. The turbine 16 is housed inside the housing 80. The diameter of the housing 80 is slightly greater than that of the turbine 16. For example, the clearance between the periphery of the discs 50, 52 and the vertical wall of the housing 80 is less than at 2 mm or 1 mm. The dispenser 24 is fixed.

Le diamètre du distributeur 24 est tel que le distributeur 24 englobe l'ensemble des parties supérieures des hydrocyclones 26, disposés en cercle autour de l'axe 20. Pour minimiser l'encombrement, le cercle extérieur délimitant le distributeur 24 se trouve à moins de 5 cm, et, de préférence, à moins de 3 cm, ou 2 cm du point de la paroi des hydrocyclones 26 le plus éloigné de l'axe 20. Le distributeur 24 comporte un orifice circulaire par hydrocyclone 26, afin que la partie supérieure de chaque hydrocyclone 26 soit logée à l'intérieur de l'orifice correspondant.The diameter of the distributor 24 is such that the distributor 24 includes all the upper parts of the hydrocyclones 26, arranged in a circle about the axis 20. To minimize the bulk, the outer circle defining the distributor 24 is less than 5 cm, and preferably less than 3 cm, or 2 cm from the point of the wall of the hydrocyclones 26 farthest from the axis 20. The distributor 24 has a circular orifice by hydrocyclone 26, so that the upper part each hydrocyclone 26 is housed inside the corresponding orifice.

Le distributeur 24 comporte un canal de distribution 82 par hydrocyclone 26. Les canaux de distribution 82, ici tous identiques et répartis régulièrement sur la périphérie du logement 80, sont donc au nombre de sept. Un seul canal 82 est décrit par la suite.The distributor 24 comprises a distribution channel 82 by hydrocyclone 26. The distribution channels 82, here all identical and regularly distributed on the periphery of the housing 80, are therefore seven in number. A single channel 82 is described below.

Le distributeur 24 récupère l'eau refoulée par la turbine 16 dans les canaux de distribution 82 pour l'introduire à l'intérieur de chaque hydrocyclone 26, tangentiellement à la paroi de l'hydrocyclone 26. Chaque canal 82 comporte un orifice d'entrée 84 formé dans le logement 80, et un orifice de sortie 86, dans la paroi d'un hydrocyclone 26. Deux orifices d'entrée 84 consécutifs sont séparés, dans un plan horizontal, par un arc de cercle 85 délimitant le logement 80. La valeur angulaire des arcs de cercle 85, tous identiques, est, de préférence, inférieure à 20°, ou encore à 5°. Les orifices d'entrée 84 ont une forme rectangulaire.The distributor 24 recovers the water discharged by the turbine 16 into the distribution channels 82 to introduce it inside each hydrocyclone 26, tangentially to the wall of the hydrocyclone 26. Each channel 82 has an inlet port 84 formed in the housing 80, and an outlet port 86, in the wall of a hydrocyclone 26. Two consecutive inlet ports 84 are separated, in a horizontal plane, by an arc 85 defining the housing 80. the angular value of the circular arcs 85, all identical, is preferably less than 20 °, or even 5 °. The inlet ports 84 have a rectangular shape.

Chaque canal 82 s'étend dans un plan horizontal, et la section transversale de chaque canal 82 dans ce plan horizontal est délimitée, de part et d'autre, par deux courbes 88 et 90. Ces courbes 88, 90 correspondent à l'intersection entre les parois verticales du canal 82 et le plan horizontal. Les deux courbes 88 et 90 ne sont pas rectilignes, et ne comportent aucun point d'inflexion, afin de limiter les pertes de charges de l'eau circulant à l'intérieur du canal 82. Dans ce mode de réalisation, les deux courbes 88 et 90 se rapprochent progressivement l'une de l'autre au fur et à mesure que l'on se déplace de l'orifice 84 vers l'orifice 86. Ainsi, la vitesse de l'eau en sortie du canal 82 est supérieure à la vitesse de l'eau en entrée du canal 82. Cela permet d'augmenter la vitesse de l'eau avant l'entrée dans l'hydrocyclone 26. La force centrifuge dans l'hydrocyclone 26 sera donc plus importante et la séparation des particules solides de meilleure qualité. Les parois du canal 82 sont lisses afin de limiter les frottements de l'eau contre les parois et de minimiser les pertes de charges.Each channel 82 extends in a horizontal plane, and the cross section of each channel 82 in this horizontal plane is delimited, on either side, by two curves 88 and 90. These curves 88, 90 correspond to the intersection between the vertical walls of the channel 82 and the horizontal plane. The two curves 88 and 90 are not rectilinear, and have no point of inflection, in order to limit the pressure losses of the water flowing inside the channel 82. In this embodiment, the two curves 88 and 90 are progressively closer to each other as one moves from the orifice 84 to the orifice 86. Thus, the speed of the water at the outlet of the channel 82 is greater than the speed of the water at the inlet of the channel 82. This makes it possible to increase the speed of the water before entering the hydrocyclone 26. The centrifugal force in the hydrocyclone 26 will therefore be greater and the separation of the particles higher quality solids. The walls of the channel 82 are smooth in order to limit the friction of the water against the walls and to minimize the pressure losses.

Chaque canal 82 débouche dans un hydrocyclone 26 au niveau de l'orifice 86. La courbe 90 est tangente à la paroi de l'hydrocyclone 26, au niveau de l'orifice 86.Each channel 82 opens into a hydrocyclone 26 at the orifice 86. The curve 90 is tangent to the wall of the hydrocyclone 26, at the orifice 86.

L'intersection de la courbe 90 avec la paroi verticale du logement 80 est représentée plus en détail sur la figure 5. Sur cette figure, la périphérie du logement 80 est représentée par un cercle 91. Une flèche F indique le sens de rotation de la turbine 16 à l'intérieur du logement central 80, ici, dans le sens des aiguilles d'une montre. La courbe 90 coupe le cercle 91 en un point C. L'angle γ entre un vecteur tangent 92 à la courbe 90 au niveau du point C et un vecteur tangent 94 en C au cercle 91, est compris entre 0° et 45°, et de préférence, entre 0° et 30°, ou entre 0° et 20°. De préférence, l'angle γ est choisi égal à l'angle β (figure 3) à +/- 20% près ou 10% près. Les deux vecteurs 92 et 94 sont orientés dans le sens d'écoulement de l'eau.The intersection of the curve 90 with the vertical wall of the housing 80 is shown in more detail on the figure 5 . In this figure, the periphery of the housing 80 is represented by a circle 91. An arrow F indicates the direction of rotation of the turbine 16 inside the central housing 80, here, in the direction of clockwise. Curve 90 intersects circle 91 at point C. The angle γ between a tangent vector 92 at curve 90 at point C and a tangent vector 94 at C at circle 91 is between 0 ° and 45 °. and preferably between 0 ° and 30 °, or between 0 ° and 20 °. Preferably, the angle γ is chosen equal to the angle β ( figure 3 ) within +/- 20% or within 10%. The two vectors 92 and 94 are oriented in the direction of flow of the water.

La figure 6 représente, en coupe, le demi-hydrocyclone 26. Les hydrocyclones 26 sont symétriques par rapport à un axe vertical, une moitié d'un hydrocyclone 26 est donc représentée seulement.The figure 6 represents, in section, the half-hydrocyclone 26. The hydrocyclones 26 are symmetrical with respect to a vertical axis, one half of a hydrocyclone 26 is thus represented only.

L'hydrocyclone 26 comporte classiquement une partie supérieure cylindrique 100 de section circulaire, et en-dessous, un cône 102 dont la section dans un plan horizontal diminue en s'éloignant de la partie supérieure 100. En-dessous du cône 102, se trouve une extrémité de collecte 104 des particules solides séparées de l'eau. Cette extrémité 104 est cylindrique de section circulaire, égale à la section de l'extrémité inférieure du cône 102. L'hydrocyclone 26 comporte dans la partie 100 un orifice d'entrée de l'eau, qui correspond à l'orifice de sortie 86 du canal de distribution 82 débouchant tangentiellement à l'intérieur de cet hydrocyclone 26. L'orifice 86 a une section rectangulaire dans un plan vertical. Ici, l'orifice 86 jouxte l'extrémité supérieure de l'hydrocyclone 26. L'hydrocyclone 26 comporte également une buse de sortie 30, par laquelle sort l'eau filtrée. La buse 30 se trouve au centre de la partie cylindrique 100, elle a une section, dans un plan horizontal, circulaire. Une extrémité de la buse 30 se trouve à l'intérieur de la partie cylindrique 100. L'autre extrémité est fluidiquement raccordée au conduit 32.The hydrocyclone 26 conventionally comprises a cylindrical upper portion 100 of circular section, and below, a cone 102 whose section in a horizontal plane decreases away from the upper part 100. Below the cone 102, lies a collection end 104 of the solid particles separated from the water. This end 104 is cylindrical of circular section, equal to the section of the lower end of the cone 102. The hydrocyclone 26 comprises in the part 100 a water inlet port, which corresponds to the outlet port 86 distribution channel 82 opening tangentially inside this hydrocyclone 26. The orifice 86 has a rectangular section in a vertical plane. Here, the orifice 86 adjoins the upper end of the hydrocyclone 26. The hydrocyclone 26 also comprises an outlet nozzle 30, through which the filtered water leaves. The nozzle 30 is in the center of the cylindrical portion 100, it has a section in a horizontal plane, circular. One end of the nozzle 30 is inside the cylindrical portion 100. The other end is fluidly connected to the conduit 32.

L'eau est introduite dans l'hydrocyclone 26 par l'orifice 86 d'entrée tangentiel, ce qui lui communique un mouvement de rotation, lequel engendre la force centrifuge. Cette force centrifuge sépare l'eau des particules plus denses que l'eau. Les particules plus denses que l'eau tombent dans l'extrémité de collecte 104. L'eau filtrée, débarrassée de ses particules solides, remonte par la buse de sortie 30.The water is introduced into the hydrocyclone 26 through the tangential inlet orifice 86, which gives it a rotational movement, which generates the centrifugal force. This centrifugal force separates water from particles that are denser than water. The particles that are denser than the water fall into the collection end 104. The filtered water, freed of its solid particles, rises through the outlet nozzle 30.

Un tel dispositif 2 de filtration permet de filtrer des particules dont la densité, par rapport à l'eau pure à 4°C, est supérieure ou égale à 2 et dont la taille est supérieure ou égale à 20 µm ou 10 µm ou 5 µm. Les dimensions précises d'un hydrocyclone permettant d'atteindre ces résultats peuvent être déduites des enseignements et données contenus, par exemple, dans les articles suivants :

  • Rietma, K. 1961, « Performance and design of hydrocyclones ». Parts I to IV. Chem. Eng. Sci. Vol 15 pp. 298-325 , et
  • Bradley, D. & Pulling, D.J. 1959, « Flow patterns in the hydraulic cyclone and their interprétation in terms of performance ». Trans. Inst. Chem. Eng. Vol 37 pp. 34-45 .
Such a filtration device 2 makes it possible to filter particles whose density, relative to pure water at 4 ° C., is greater than or equal to 2 and whose size is greater than or equal to 20 μm or 10 μm or 5 μm. . The precise dimensions of a hydrocyclone to achieve these results can be deduced from the teachings and data contained, for example, in the following articles:
  • Rietma, K. 1961, "Performance and design of hydrocyclones". Parts I to IV. Chem. Eng. Sci. Vol 15 pp. 298-325 , and
  • Bradley, D. & Pulling, DJ 1959, "Flow patterns in the hydraulic cyclone and their interpretation in terms of performance". Trans. Inst. Chem. Eng. Vol 37 pp. 34-45 .

La figure 7 représente un autre dispositif 110 de filtration. Le dispositif 110 est identique au dispositif 2 à l'exception de l'électrovanne 42 et du capteur 38. Le dispositif 110 comporte une électrovanne 112 par hydrocyclone 26. Chaque électrovanne 112 est disposée entre l'extrémité de collecte 104 de l'hydrocyclone 26 et le réservoir 36. Le clapet de l'électrovanne 112 est apte à se déplacer entre:

  • une position ouverte dans laquelle les particules solides peuvent circuler de l'extrémité de collecte 104 jusqu'au réservoir 36, et, en alternance,
  • une position fermée dans laquelle les particules solides ne peuvent pas circuler de l'extrémité de collecte 104 jusqu'au réservoir 36.
The figure 7 represents another filtration device 110. The device 110 is identical to the device 2 with the exception of the solenoid valve 42 and the sensor 38. Device 110 comprises a solenoid valve 112 by hydrocyclone 26. Each solenoid valve 112 is disposed between the collection end 104 of the hydrocyclone 26 and the reservoir 36. The valve of the solenoid valve 112 is able to move between:
  • an open position in which the solid particles can flow from the collection end 104 to the reservoir 36, and, alternatively,
  • a closed position in which the solid particles can not flow from the collection end 104 to the reservoir 36.

Par exemple, l'électrovanne 112 est identique à l'électrovanne 42.For example, the solenoid valve 112 is identical to the solenoid valve 42.

Le dispositif 110 comporte ici un capteur 114 placé à l'extérieur d'un hydrocyclone 26 et contre une paroi de l'extrémité de collecte 104. Le capteur 114 transmet un signal de mesure représentatif de la quantité de particules solides présentes dans l'extrémité de collecte 104 à l'unité électronique 22. Ici, le capteur 114 est un capteur optique. La paroi de l'extrémité de collecte 104 est transparente à la lumière.The device 110 here comprises a sensor 114 placed on the outside of a hydrocyclone 26 and against a wall of the collection end 104. The sensor 114 transmits a measurement signal representative of the quantity of solid particles present in the end at the electronic unit 22. Here, the sensor 114 is an optical sensor. The wall of the collection end 104 is transparent to light.

De nombreux autres modes de réalisation sont possibles. Par exemple, le nombre d'hydrocyclones peut être différent de sept. Toutefois, le nombre d'hydrocyclones est supérieur à trois ou à quatre, et de préférence, supérieur à huit ou à dix.Many other embodiments are possible. For example, the number of hydrocyclones may be different from seven. However, the number of hydrocyclones is greater than three or four, and preferably greater than eight or ten.

Les hydrocyclones peuvent ne pas être tous identiques. Par exemple, un hydrocyclone est plus petit que les autres.The hydrocyclones may not all be identical. For example, a hydrocyclone is smaller than the others.

Le nombre d'aubages de la turbine peut être différent du nombre d'hydrocyclones. Par exemple, le nombre d'aubages est inférieur au nombre d'hydrocyclones. Le nombre d'aubages peut aussi être supérieur au nombre d'hydrocyclones.The number of blades in the turbine may be different from the number of hydrocyclones. For example, the number of blades is less than the number of hydrocyclones. The number of bladders can also be greater than the number of hydrocyclones.

Le nombre de canaux de distribution du distributeur peut être supérieur au nombre d'hydrocyclones. Dans ce cas, plus d'un canal de distribution débouche dans le même hydrocyclone.The number of distribution channels of the dispenser may be greater than the number of hydrocyclones. In this case, more than one distribution channel opens in the same hydrocyclone.

La turbine centrifuge peut être différente d'un rouet. Par exemple, elle est remplacée par une hélice.The centrifugal turbine may be different from a wheel. For example, it is replaced by a helix.

Le dispositif de filtration peut comporter un tamis, placé en amont de la pompe, qui assure une préfiltration des particules solides les plus grosses.The filtration device may comprise a sieve, placed upstream of the pump, which pre-filters the larger solid particles.

Le cercle 64 de la turbine peut avoir un diamètre inférieur à celui du disque 50. Dans ce cas, les aubages n'atteignent pas le contour du disque 50.The circle 64 of the turbine may have a smaller diameter than the disk 50. In this case, the blades do not reach the contour of the disk 50.

La turbine peut ne pas comporter de disque supérieur 52.The turbine may not have an upper disk 52.

Les aubages 56 peuvent être en trois dimensions, c'est-à-dire que les courbes selon lesquelles s'étend chaque aubage 56 dans des plans de coupe horizontaux différents sont différentes.The blades 56 may be in three dimensions, that is to say that the curves in which each blade 48 extends in different horizontal section planes are different.

L'unité électronique 22 peut se trouver à l'extérieur du carter 4.The electronic unit 22 can be outside the housing 4.

Le réservoir 36 peut ne pas être relié au tout à l'égout ou à un puits perdu. Dans ce cas, le dispositif nécessite une vidange manuelle régulière du réservoir 36.The reservoir 36 may not be connected at all to the sewer or to a lost well. In this case, the device requires regular manual emptying of the tank 36.

Le dispositif 110 peut comporter un capteur 114 par extrémité de collecte 104. L'unité électronique 22 peut commander chaque électrovanne 112 indépendamment des autres, ou alors toutes les électrovannes 112 en même temps.The device 110 may comprise a sensor 114 by collecting end 104. The electronic unit 22 can control each solenoid valve 112 independently of the others, or all the solenoid valves 112 at the same time.

En variante, l'électrovanne 42 ou 112 est remplacée par une vanne manuelle. Dans une autre variante, les électrovannes 42 et 112 sont omises.Alternatively, the solenoid valve 42 or 112 is replaced by a manual valve. In another variant, the solenoid valves 42 and 112 are omitted.

L'actionneur des électrovannes 42 ou 112 peut être un moteur.The actuator of the solenoid valves 42 or 112 may be a motor.

Le capteur 38 peut être remplacé par un capteur optique, placé à côté du réservoir 36. Dans ce cas, la paroi du réservoir 36 doit être transparente à la lumière. De même, le capteur 114 peut être un capteur piézoélectrique, placé dans l'extrémité de collecte 104. En variante, le capteur 38 ou 114 est omis. Dans ce cas, l'unité 22 est programmée pour commander l'ouverture des électrovannes 42 ou 112 à intervalle régulier.The sensor 38 may be replaced by an optical sensor, placed next to the reservoir 36. In this case, the wall of the reservoir 36 must be transparent to the light. Similarly, the sensor 114 may be a piezoelectric sensor, placed in the collection end 104. Alternatively, the sensor 38 or 114 is omitted. In this case, the unit 22 is programmed to control the opening of the solenoid valves 42 or 112 at regular intervals.

Le dispositif peut comporter un réservoir par hydrocyclone, et non pas un seul réservoir commun. En variante, le réservoir 36 est omis. Dans ce cas, les extrémités 104 de collecte sont chacune directement fluidiquement raccordées à l'orifice 40.The device may comprise a reservoir per hydrocyclone, and not a single common reservoir. Alternatively, the reservoir 36 is omitted. In this case, the collection ends 104 are each directly directly connected to the orifice 40.

Les hydrocyclones peuvent être inclinés par rapport à un axe vertical.The hydrocyclones can be inclined with respect to a vertical axis.

Le carter peut ne pas être cylindrique. Par exemple, il peut avoir une forme cubique.The housing may not be cylindrical. For example, it can have a cubic form.

La vitesse du moteur 18 peut être variable.The speed of the engine 18 may be variable.

L'ensemble des dispositifs 2 ou 110 peut ne pas être placé dans un carter 4. Dans ce cas, chaque élément du dispositif est lui-même étanche à l'eau.The set of devices 2 or 110 may not be placed in a housing 4. In this case, each element of the device is itself waterproof.

L'unité électronique 22 de commande peut être placée à l'intérieur ou à l'extérieur du carter.The electronic control unit 22 can be placed inside or outside the housing.

L'angle γ compris entre 0° et 45° peut aussi être l'angle entre la tangente à la courbe 88 et la tangente au cercle 91, au niveau du point d'intersection de la courbe 88 et du cercle 91. Cette propriété de l'angle γ peut aussi concerner les deux courbes 88 et 90.The angle γ between 0 ° and 45 ° can also be the angle between the tangent to the curve 88 and the tangent to the circle 91, at the point of intersection of the curve 88 and the circle 91. This property of the angle γ can also relate to the two curves 88 and 90.

Les électrovannes 42, 112 et l'unité 22 de commande de ces électrovannes peuvent être mises en oeuvre indépendamment de la présence ou non de la pompe 8 à l'intérieur du carter 4.The solenoid valves 42, 112 and the control unit 22 for these solenoid valves can be implemented independently of the presence or absence of the pump 8 inside the casing 4.

Claims (11)

  1. Swimming pool water filtration device (2; 110) comprising:
    - at least two orifices, respectively a suctioning orifice (6) for the water and a recirculating orifice (34) for the filtered water,
    - at least three hydrocyclones (26), each forming a cyclonic filter capable of separating the water from solid particles contained in this water, said hydrocyclones (26) being arranged in a circle to delimit a substantially cylindrical internal space (28) which extends along a central axis (20),
    - a pump (8) in fluidic connection with the suctioning orifice (6) via a conduit (10), and
    - a distributor (24) capable of collecting the water recirculated by the pump and introducing the water into the hydrocyclones (26), said distributor (24) comprising at least one distribution channel (82) for each hydrocyclone (26), each channel (82) extending in a plane perpendicular to the central axis (20), from an inlet orifice (84) formed in a central circular housing (80) to an outlet orifice (86) formed in a wall of a hydrocyclone (26), each channel (82) discharging into the hydrocyclone (26) tangentially to the wall of this hydrocyclone (26),
    characterized in that the pump (8) is housed inside the substantially cylindrical space (28), said pump (8) comprising:
    • a centrifugal turbine (16) comprising an axis of rotation (20) merged with the central axis, capable of removing water from the swimming pool in a direction parallel to the axis of rotation (20) and recirculating said water in directions perpendicular to the axis of rotation (20), the centrifugal turbine (16) being housed inside the central housing (80) of the distributor, opposite the inlet orifices (84) of the channels, and
    • an electric motor (18) capable of driving the turbine (16) in rotation.
  2. Device (2; 110) according to Claim 1, in which the device comprises a watertight housing (4), inside which are housed the hydrocyclones (26), the pump (8) and the distributor (24), said housing (4) comprising at least the two orifices, respectively a suctioning orifice (6) for the water and a recirculating orifice (34) for the filtered water.
  3. Device (110) according to either of the preceding claims, in which each hydrocyclone (26) comprises a collection end (104) for solid particles separated from the water and the device (110) comprises:
    - at least one tank (36) capable of collecting the solid particles separated from the water by the hydrocyclones (26), in fluidic connection with at least one collection end (104),
    - at least one controllable solenoid valve (112) arranged between at least one of said collection ends (104) and the tank (36), said solenoid valve (112) being capable of being displaced in response to a command, between:
    • an open position in which the solid particles are able to circulate from the collection end (104) to the tank (36) and, alternately,
    • a closed position in which the solid particles are not able to circulate from the collection end (104) to the tank (36),
    - an electronic unit (22) for automatic control of said at least one solenoid valve (112).
  4. Device (2) according to Claim 1 or 2, in which each hydrocyclone (26) comprises a collection end (104) for solid particles separated from the water and the device (2) comprises:
    - at least one controllable solenoid valve (42) arranged between said collection end (104) and an evacuation orifice (40) for the solid particles outside the housing (4), said solenoid valve (42) being capable of being displaced in response to a command, between:
    • an open position in which the solid particles are able to circulate via the evacuation orifice (40) and, alternately
    • a closed position in which the solid particles are not able to circulate via the evacuation orifice (40),
    - an electronic unit (22) for automatically controlling said at least one solenoid valve (42).
  5. Device (2; 110) according to Claim 3 or 4, in which:
    - the device (2; 110) comprises at least one sensor (38; 114) for solid particles, capable of transmitting a measurement signal, which represents the quantity of solid particles present in the collection end (104) of a hydrocyclone or in the tank (36), to the electronic unit (22), and
    - said electronic unit (22) is programmed to control automatically an opening of the solenoid valve (42; 112) in response to said measurement signal passing a predetermined threshold.
  6. Device (2; 110) according to any one of the preceding claims, in which the conduit (10) connecting the pump (8) to the suctioning orifice (6) is a frustoconical conduit comprising two ends (12, 14) of different sections, the end having the largest section (12), being directly connected to the suctioning orifice (6).
  7. Device (2; 110) according to any one of the preceding claims, in which the centrifugal turbine (16) comprises:
    - a solid disk (50) extending in a plane perpendicular to the axis of rotation (20) of the turbine,
    - at least three identical blades (56) spaced apart uniformly and arranged on the disk (50), the cross section of each blade (56) in a transverse plane perpendicular to the axis of rotation (20) extending along a non-rectilinear curve (58, 60), without a point of inflection, said curve extending from an internal circle (62) centred on the axis of rotation (20) of the turbine, to an external circle (64) centred on the same axis, and such that:
    • at the point of intersection with the internal circle (62), the angle between the tangent (66) to this curve and the tangent (68) to the internal circle is between 0° and 50°, and
    • at the point of intersection with the external circle (64) the angle between the tangent (70) to this curve and the tangent (72) to the external circle is between 0° and 45°.
  8. Device (2; 110) according to any one of the preceding claims, in which the cross section of each distribution channel (82) in a transverse plane perpendicular to the axis of rotation (20) is delimited on both sides by two non-rectilinear curves (88, 90), without a point of inflection, said two curves (88, 90) approaching one another progressively when passing from the inlet orifice (84) to the outlet orifice (86).
  9. Device (2; 110) according to any one of the preceding claims, in which:
    - the cross section of each distribution channel (82) in a transverse plane perpendicular to the axis of rotation (20) is delimited on both sides by two non-rectilinear curves (88, 90), without a point of inflection, and
    - the angle in the region of the inlet orifice (84) between the tangent (92) to one of the two curves (88, 90) delimiting each channel (82) and the tangent (94) to the central circular housing (80) is between 0° and 45°.
  10. Device (2; 110) according to any one of the preceding claims, in which the device (2; 110) comprises at least seven hydrocyclones (26).
  11. Device (2; 110) according to any one of the preceding claims, in which the hydrocyclones (26) are all identical.
EP13792886.7A 2012-11-15 2013-11-12 Swimming-pool filtering device Not-in-force EP2919915B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1260890A FR2997870B1 (en) 2012-11-15 2012-11-15 SWIMMING WATER FILTRATION DEVICE
PCT/EP2013/073657 WO2014076098A1 (en) 2012-11-15 2013-11-12 Device for filtering the water of a pool

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EP2919915A1 EP2919915A1 (en) 2015-09-23
EP2919915B1 true EP2919915B1 (en) 2017-01-11

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EP (1) EP2919915B1 (en)
ES (1) ES2621670T3 (en)
FR (1) FR2997870B1 (en)
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US9885194B1 (en) 2017-05-11 2018-02-06 Hayward Industries, Inc. Pool cleaner impeller subassembly
US9896858B1 (en) 2017-05-11 2018-02-20 Hayward Industries, Inc. Hydrocyclonic pool cleaner
US10156083B2 (en) 2017-05-11 2018-12-18 Hayward Industries, Inc. Pool cleaner power coupling
US10253517B2 (en) 2017-05-11 2019-04-09 Hayward Industries, Inc. Hydrocyclonic pool cleaner
US10767382B2 (en) 2017-05-11 2020-09-08 Hayward Industries, Inc. Pool cleaner impeller subassembly

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WO2014076098A1 (en) 2014-05-22
US9656277B2 (en) 2017-05-23
ES2621670T3 (en) 2017-07-04
FR2997870B1 (en) 2015-01-16
FR2997870A1 (en) 2014-05-16
EP2919915A1 (en) 2015-09-23
US20160271627A1 (en) 2016-09-22

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