FR3090714A1 - FILTER BLOCK FOR SWIMMING POOL PROVIDED WITH A SYSTEM FOR MEASURING A CLOGGING LEVEL AND / OR DETECTING A CLOGGING STATE OF A FILTER - Google Patents

Abstract

The invention relates mainly to a filtration block (10) for swimming pools comprising: - a pump, - at least one filter (16.1, 16.2), characterized in that said filtration block (10) further comprises a system (28 ) for measuring a clogging level and / or for detecting a clogging state of said filter (16.1, 16.2) comprising: - a sensor (29) for measuring the flow rate or fluid speed, - a conduit for suction (30.1) connected to the sensor (29) having a suction nozzle (31.1) made in a communicating area with water from a basin, and - an outlet conduit (30.2) connected to the sensor (29) having an outlet nozzle (31.2) produced in a water discharge zone (34). Figure for abstract: Figure 2

Description

Description

Title of the invention: FILTER BLOCK FOR SWIMMING POOL PROVIDED WITH A SYSTEM FOR MEASURING A LEVEL OF CLOGGING AND / OR DETECTING A STATE OF CLOGGING OF A FILTER

The invention relates to a swimming pool filtration unit provided with a system for measuring a clogging level and / or for detecting a clogging state of a filter.

Filtration units are known comprising a tank having an opening opening into a volume of water in the swimming pool and an access opening intended to be located at ground level around the swimming pool. At least one filter is placed inside the tank. The tank comprises on the side of its lower end a first conduit in which a primary water flow circulates. This duct is connected to an inlet of a pump, which has an outlet connected to an injection inlet of a flow multiplier, in particular of the Venturi type. In addition, at least one second conduit in which a secondary water flow circulates is connected to a suction inlet of the flow multiplier which generates a current of water inside the swimming pool basin.

In order to detect clogging of the filter by dirt, the document FR2979656 teaches to use a pressure switch installed at the level of the flow multiplier. However, such a sensor has a high cost price and does not allow a sufficiently significant pressure difference to be detected between a new filter and a clogged filter. Indeed, the Applicant has observed that if such a pressure sensor was effective in detecting the fouling of a sand filter, it was not possible to use it to detect clogging of the woven material filter, in the since the enclosure of the filtration unit is not properly closed and therefore does not allow pressure variations representative of filter clogging to be observed.

The invention aims to remedy this drawback by starting from the observation that when the cartridge is clogged, the amount of filtered water decreases. The invention therefore proposes to measure the water flow using a corresponding sensor which is less expensive than a pressure sensor in order to deduce the level of clogging of the filter. The difference in flow between an unclogged filter and a clogged filter is significant enough to allow the clogging of the filter to be detected.

More specifically, the invention relates to a filtration block for swimming pools comprising:

- a pump,

at least one filter, characterized in that said filtration unit further comprises a system for measuring a clogging level and / or for detecting a clogging state of said filter comprising:

- a flow rate or fluid speed sensor,

a suction pipe connected to the sensor having a suction nozzle produced in a zone communicating with water from a basin, and

- an outlet pipe connected to the sensor having an outlet nozzle made in a water delivery area.

In one embodiment, the suction nozzle is formed in a low suction zone of the pool.

In one embodiment, the suction nozzle is formed in a tank.

According to one embodiment, the suction nozzle is formed in a water level regulator.

According to one embodiment, the outlet tapping is carried out in a flow multiplier.

In one embodiment, said filtration unit comprises a control module making it possible to determine a level of clogging and / or a clogging state of said filter as a function of the water flow rate measured by the sensor.

In one embodiment, the control module is capable of determining the level of clogging via the use of a map establishing a correspondence between a level of clogging, expressed for example in percent, and a flow rate measured by the sensor.

In one embodiment, the control module is able to determine an unclogged or clogged state by comparison of the flow rate measured by the sensor with a threshold.

In one embodiment, the control module includes means for communicating the level of clogging and / or the clogging state of the filter to a monitoring device and / or a portable device of a user.

In one embodiment, the pump comprises an electric motor with variable speed, multi-speed, or fixed speed.

The invention will be better understood on reading the description which follows and on examining the figures which accompany it. These figures are given only by way of illustration but in no way limit the invention.

[Fig.l]

Figure 1 is a front perspective view of the filtration unit according to the invention incorporating a system for measuring a clogging level and / or a clogging state of a filter;

[Fig.2]

Figure 2 is a rear perspective view of the filter unit according to the invention incorporating a system for measuring a clogging level and / or a clogging state of a filter.

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

Figures 1 and 2 show a filtration block 10 for swimming pool comprising a tank 11 having an opening 12 opening into a volume of the swimming pool, via a recuperator conduit 13, and an access opening 15 intended to be located at ground level around the pool. The access opening 15 is intended to be closed by a removable hatch (not shown).

At least one filter is placed inside the tank 11. Advantageously, a first filter 16.1 provides coarse filtration letting particles of dimension less than a fraction of a millimeter pass on a screen filter principle. For example, this first filter 16.1 consists of a basket advantageously formed of a fabric with orifices from 0.1 to 0.5mm, for example 0.3mm, molded between ribs of injected plastic. In addition, a second filter 16.2 ensuring fine filtration comprises a cylindrical filter consisting of a sheet of nonwoven material pleated in an accordion. The ply is held between two circular flanges and surrounded by an outer nonwoven material. The tank 11 may be provided with an overflow device 14.

A first conduit 17 from the tank 11 in which a primary water flow circulates is connected to an inlet of a pump 18, which has an outlet connected to an injection inlet 19 of a flow multiplier 21. A second conduit 22 coming from the tank 11 in which a secondary water flow circulates is connected to a suction inlet 24 of the flow multiplier 21. The flow multiplier 21, in particular of the Venturi type, comprises, so known per se, a convergent section and a divergent section to accelerate the flow of water generated at its outlet 25 making it possible to create the current inside the swimming pool basin. The pump 18 may include an electric motor with variable speed, multi-speed, or fixed speed in order to vary the intensity of the water flow inside the basin.

The recuperator conduit 13 and the outlet 25 of the flow multiplier open into a plate 26 integrated in a wall 27 of the swimming pool.

In addition, the filtration unit 10 includes a system 28 for measuring a clogging level of the filter and / or for detecting a clogging state of the filter 16.1, 16.2.

This system 28 comprises a sensor 29 for measuring the flow rate or the speed of the fluid, a suction conduit 30.1 connected to the sensor 29 having a suction nozzle 31.1 produced in a zone communicating with water from the basin, in particular a water suction zone 33, and an outlet conduit 30.2 connected to the sensor 29 having an outlet nozzle 31.2 produced in a water discharge zone 34.

In the example shown in Figures 1 and 2, the suction nozzle 31.1 is formed in a low suction area 33 of the swimming pool basin. The suction connection 31.1 is thus produced in a pipe 35 passing right through the wall 27 of the swimming pool. In this case, this pipe 35 is closed on the side of its rear end but it could alternatively be connected to the water filtration circuit.

Alternatively, the suction nozzle 31.1 is formed in the tank 11 or in a water level regulator. Thus, the suction connection 31.1 can be carried out in almost any zone situated around the filtration unit 10 with the exception of the discharge zone 34, the outlet pipe of the pump 18 and the suction pipe 17.

Furthermore, the outlet nozzle 31.2 is produced in the flow multiplier 21 constituting the discharge zone 34.

Advantageously, a tap 31.1, 31.2 of the conduits is produced via a snap-on connector. Alternatively, the stitching 31.1, 31.2 of the conduits is carried out by gluing, welding, or screwing, or any other means suitable for the application.

Furthermore, as illustrated in FIG. 2, a control module 37 makes it possible to determine a clogging level and / or a clogging state of the filter as a function of the water flow rate measured by the sensor 29.

The clogging level can be determined by using a mapping C establishing the correspondence between a clogging level, expressed for example in percent, and a flow rate measured by the sensor 29.

Alternatively or additionally, the control module 37 determines an unclogged or clogged state by comparison of the flow rate measured by the sensor 29 with a threshold. Thus, it is considered that the filter is in the non-clogged state when the flow rate measured by the sensor 29 is greater than the threshold and in the clogged state when the flow rate measured by the sensor 29 becomes less than the threshold. Of course, intermediate clogging levels can be detected using intermediate thresholds.

The control module 37 may include communication means 40 of the clogging level and / or the clogging state of the filter to a monitoring device and / or a portable device. The communication means 40 may be of the wireless or wired type.

Of course, the foregoing description has been given by way of example only and does not limit the scope of the invention from which one would not depart by replacing the various elements with any other equivalent.

In addition, the different features, variants, and / or embodiments of the present invention can be associated with each other in various combinations, insofar as they are not incompatible or mutually exclusive of each other.

Claims (1)

Claims [Claim 1] Filter block (10) for swimming pools comprising: - a pump (18), - at least one filter (16.1, 16.2), characterized in that said filtration unit (10) further comprises a system (28) for measuring a clogging level and / or for detecting a clogging state of said filter (16.1, 16.2) comprising: - a sensor (29) for measuring the flow rate or the fluid speed, - a suction pipe (30.1) connected to the sensor (29) having a suction nozzle (31.1) produced in a communicating area with water from a basin, and - an outlet pipe (30.2) connected to the sensor (29) having an outlet nozzle (31.2) produced in a water delivery area (34). [Claim 2] Filter block (10) according to claim 1, characterized in that the suction nozzle (31.1) is formed in a low suction zone (33) of the pool. [Claim 3] Filter block (10) according to claim 1, characterized in that the suction nozzle (31.1) is formed in a tank (11). [Claim 4] Filter block (10) according to claim 1, characterized in that the suction nozzle (31.1) is provided in a water level regulator. [Claim 5] Filter block (10) according to claim 1, characterized in that the outlet nozzle (31.2) is produced in a flow multiplier (21). [Claim 6] Filter block (10) according to any one of claims 1 to 5, characterized in that it comprises a control module (37) making it possible to determine a level of clogging and / or a state of clogging of said filter (16.1, 16.2) as a function of the water flow rate measured by the sensor (29). [Claim 7] Filter block (10) according to claim 6, characterized in that the control module (37) is capable of determining the level of clogging by using a map (C) establishing a correspondence between a level of clogging, expressed for example in percent, and a flow rate measured by the sensor (29). [Claim 8] Filter block (10) according to claim 6 or 7, characterized in that the control module (37) is capable of determining an unclogged or clogged state by comparison of the flow rate measured by the sensor (29) with a threshold. [Claim 9] Filtration block (10) according to any one of claims 6 to 8, characterized in that the control module (37) comprises means of communication (40) of the clogging level and / or the clogging state of the filter (16.1, 16.2) to a monitoring device and / or a portable device of a user. [Claim 10] Filter block (10) according to any one of claims 1 to 9, characterized in that the pump (18) comprises an electric motor with variable speed, multi-speed, or fixed speed.