FR2764321A1 - Automatic maintenance of water in swimming pool - Google Patents

Abstract

The swimming pool water maintenance system injects a disinfectant agent into the water at intervals controlled by measurement (30) of the temperature of the water. A flow of water is diverted from the main supply to the pool. The flow is at constant rate determined by a constant flow pump (5). The diverted flow is operated for a time interval determined by water temperature. The pump is controlled by a program that delivers a set operating time. Different flow periods are created by repeating the set operating time for the time determined from the temperature measurement.

Description

WATER MAINTENANCE METHOD OF A SWIMMING POOL AND DEVICE
FOR THE IMPLEMENTATION OF THE PROCESS
The present invention relates to a method and a device for maintaining the water of a swimming pool. It aims essentially to automate the operations that are necessary to maintain the water contained in the swimming pools under sanitary conditions appropriate to its use.

 Starting with considering the case of the preferred application of the invention to the individual pools, which is that of the pools that people commonly install in their garden to bathe, it will be observed that the clean of such swimming pools is to have undergo regular disinfection of the water it contains to stop the proliferation of bacterial flora that develops there. In addition, the large quantity of water, the conditions of implantation and the economic requirements combine to prohibit the use of a real permanent renewal of water, so that in practice the maintenance of sanitary cleanliness is done by taking water from the pool to pass through an outdoor circuit that purifies, usually by filtration and the addition of a disinfectant, before reinjecting and purified in the same pool.

 It follows that the invention is not limited to this particular type of swimming pool and that its applications extend into many other fields in which the same kinds of needs are felt.

 Among the other swimming pools that will be of interest to equip in accordance with the invention, there may be mentioned, for example, the basins of the thermal centers, the basins used for bathing animals or raising fish, those used for cultivation of fragile plants. These basins, which the invention encompasses under the concept of pool, can be very varied in their shape, their depth and their capacity. Similarly, when speaking of an addition of disinfectant in the context of the invention, the concept should be understood as being able to cover the case of any constituent that should be added to the pool water. to regenerate it to the desired content, for example to compensate for its consumption or its destruction as and when the use of the pool.

 By its different characteristics, as will be more fully defined and described below, the present invention greatly simplifies the management of swimming pools, including individual pools, while reducing overall cost of maintenance.

Thanks to the automatic adjustment that they provide, the user no longer has to intervene to adjust the dosage of disinfectant according to the conditions that affect its consumption, and he no longer runs the risk of making disordered, insufficient or untimely additions.

 The invention does not go so far as a measurement of the disinfectant content in the pool water. Therefore, as well as by a number of other provisions, the invention requires for its implementation a simple material, inexpensive and solid construction, while providing good operational safety for sufficient accuracy . In addition, this material is easy to set up and it easily adapts in addition to water purification and regeneration equipment already present in an existing pool facility.

 In order to achieve the objectives thus set, the invention essentially consists of regulating the addition of the disinfectant (or other purifying or regenerating agent) by acting on the quantity of water which is taken and recycled via the purification circuit for a given period of time (or unit period), by control of the organs which ensure the circulation as a function of the detection of a measurable quantity which is in one-to-one relationship with the disinfectant content required in the water of the swimming pool.

 According to one of the features of the invention, said measurable quantity is advantageously the temperature of the pool water. His measurement is very easy. I1 is sufficient in particular a temperature sensor placed on the bypass line constituting the purification circuit. And one can easily determine, by experiment and calibration, a one-to-one relationship between this temperature and the purification and regeneration regime to bring the pool water back to the proper sanitary conditions. It does not matter that a rise in temperature, for example, causes an increase in bacterial growth, or that it is the consequence, or that it is linked to a number unusual visitors. In any case, it automatically causes the necessary addition of disinfectant.

 It is therefore understood that, thanks to the invention, it is not necessary to know the value of the disinfectant content itself. In a symmetrical manner, the invention also makes it unnecessary to directly control the injection of a metered quantity of disinfectant, since, according to another characteristic of the In the invention, its incorporation is carried out in the bypass purification circuit of the pool, in a manner naturally related to the amount of water withdrawn and recycled per unit time period.

 Note that it is not essential that there is a proportional or otherwise known relationship between the amount of water thus treated and the dose of disinfectant injected into it. Again, in practice, and at least in the most common circumstances, there is self-regulation through microbial proliferation exacerbated by inadequate disinfectant, with its consequences on the detected temperature, so that a calibration experimental is sufficient to ensure satisfactory operation in the majority of situations.

 In its preferred embodiments, the invention exploits the fact that many disinfecting agents commonly used in the maintenance of swimming pool waters are introduced using material means through which water circulates. This is particularly the case of "pebbles" which release chlorine in contact with water and its dissolution power, or chlorine generators proceeding by electrolysis of a sodium chloride solution. Chlorine production then takes place only when the water is circulated in the treatment circuit.

 Other important features of the invention relate mainly to its applications in the field of private pools. As these pools are used intermittently, it is desirable that the water treatment circuit does not work permanently, but secondly, it is desirable that each time it runs for a period of time sufficient to brew all the water in the pool. In other words, this operation lasts long enough to treat a volume of water corresponding substantially to that contained in the pool.

 The invention is thus advantageously embodied in a device for automatically managing pool water maintenance operations in an installation comprising, in a conventional manner, a stirring pump, with an all-or-nothing controlled drive, for conveying the pool water in a treatment circuit connected in a closed loop to the pool and comprising means for injecting a disinfectant into said circuit, said means being preferably such that in normal operation the disinfectant flow rate added depends only on the circulating water flow from the pump.

 According to different characteristics, which are here to be considered separately or in any technically effective combination, such a device according to the invention comprises a temperature sensor mounted on said circuit to be sensitive to the temperature of the water taken from the pool and means servocontrolled to said sensor for controlling the operation of the predetermined constant flow stirring pump for a variable duration as a function of the temperature detected by said sensor, this variable duration advantageously corresponding to a whole number of sequences (or time slices) of duration fixed predetermined, said variable duration being calculated to circulate in said circuit a total volume of water substantially equal to the water capacity of the pool.

 Preferably, the operation is ensured according to pre-established programs, distinguished in particular by a daily number of brewing sequences of the same unit duration, among which the choice is determined by automatic selection according to predefined contiguous ranges of measured temperatures, according to the one in which the temperature determined by the sensor is located.

 Also preferably, the temperature detection is carried out periodically on the processing circuit, at the beginning of a brewing sequence, with a delay time to validate a measurement of the temperature of the water in the pool determining the duration of brewing to ensure in a given time, including the total daily duration.

 it is furthermore advantageous to provide safety operating programs, the triggering of which can be either automatically controlled by the same electronic circuits ensuring the regulation of the addition of disinfecting agent in normal operation, for example so that, if the temperature detection reveals a measured value that is below a minimum risk of frost and / or if it is above a maximum value of risk of intense pollution, the brewing pump operates continuously either at manual control, for example so that the user can voluntarily start the brewing pump and thus cause a temperature measurement that will cause if necessary a change of daily schedule, when he suspects an additional risk of pollution (falling leaves in the pool, intense sunlight, etc.), is still made automatic by other control circuits, which will be the case, for example, if the device of the invention involved in so-called normal regulation is coupled to an external temperature detection system which controls the start of the pump if the temperature exceeds a determined threshold. In any case, the device according to the invention can be equipped to generate an alarm signaling the safety condition.

 According to another characteristic that advantageously applies to the device of the invention, the stirring pump draws the water circulated in the suction treatment circuit partly to the bottom of the pool and partly to the surface, the two parts being mixed upstream of the temperature detection, so that the measured temperature which controls the determination of the treatment times is representative of an average temperature prevailing in the pool.

The invention will now be more fully described in the context of preferred features and their advantages, with reference to the figures of the accompanying drawings which illustrate them and in which
FIG. 1 schematically illustrates an overall view of an exemplary device according to a preferred embodiment of the invention and of the pool maintained by this device
FIG. 2 illustrates the mounting mode of a water temperature sensor, used by the device of FIG. 1
and FIG. 3 is a block diagram of the electronic circuits of the device of FIG. 1.

 FIG. 1 is a flowchart schematically illustrating the automatic maintenance management device according to the invention and thus showing the swimming pool, its water regeneration members and the means for regulating water maintenance conditions by adding a disinfecting agent.

 More specifically, the assembly is typically grouped into two main subsets: on the one hand the actual pool 1, equipped with a bottom drain 65, a surface suction mouth incorporating a roller of disinfectant, or skimmer "64, and a recycle mouth of the treated water, on the other hand a technical room 2, near the pool, in which are located the mechanical and electronic equipment necessary for the maintenance treatment of the pool water and its regulation.

 The water treatment circuit passes from one to the other of the two subsets mentioned above. It can be seen that this circuit, in which the water is conveyed by a so-called brewing pump 5, comprises a water suction duct 61, here split to take water partly from the bottom of the pool by the drain. 65 and partly on the surface by the mouth "skimmer" 64, and a delivery pipe 60 which recycles the treated water into the pool, through a filter member 63. On the circuit thus formed bypass of the pool, it is mounted a temperature sensor 30.

 It has also been shown in this figure that the suction lines 61 are associated with a valve 62. This ensures the mixing in a constant ratio between the flow from the bottom drain and the flow from the origination d suction on the surface. With this function, which is located upstream of the temperature sensor, it is ensured that the detected temperature sent as a measurement signal to the control circuits is representative of an average temperature of the water contained in the pool which remains faithful to the the calibration conditions. Alternatively, a similar valve system, associated with manual local control means or motorization and remote control means may also be used to allow the same equipment implementing the invention to establish regimes of particular operation, which are differentiated, for example, by a preferred suction from the surface of the surface water of the pool to the treatment circuit.

 In addition, other valves and pipes have not been included which are intended, in a conventional manner, to isolate the pump from the entire circuit, to cause circulation in the opposite direction with setting sewer for periods of filter cleaning, to allow maintenance interventions or replacement of mechanical components, to ensure the operations of emptying and renewal water supply.

 The circulation of water in the circuit 6061 is provided by the pump 5, which is driven by an electric motor (not shown). This pump operates at a constant rate, but the flow naturally depends on the importance of the installation. The disinfecting agent is dispensed, in the particular case illustrated, by the 64 chlorine diffusion roller, which is operative only when the pump 5 circulates the water on contact. But alternatively, it is possible to use other regeneration systems, in particular those proceeding by electrolysis, which will then be placed no longer upstream of the pump 5 but downstream, more exactly downstream of the filter 63, because they require that the water has been cleared of solid particles that it can contain at the exit of the pool.

 For regulation, the device according to the invention essentially comprises a control and display unit 3, incorporating electronic circuits which will be described in detail below, with reference to FIG. 3, and which receive the electrical signals Vs emitted by the temperature sensor 30, which reflect a measurement of the water temperature which is carried out periodically in a manner that will also be specified below. In a conventional manner, the technical room 2, or what makes it function, also comprises an electrical cabinet 4 for the supply of electrical energy of the various components of the device 3 and the motor of the pump 5.

 FIG. 2 illustrates a possible mounting mode of the sensor 30 on the suction pipe of the pump 5.

The sensor 30 is downstream of the valve 62. It comprises a body 300, consisting of a housing of any shape, and the temperature-sensitive element 301, which must be immersed in the water flowing in the pipe 61. Assuming that the pipe 61 is based on plastic material, for example polyvinyl chloride, it suffices to pierce this pipe 61, to insert the sensitive element 301 and to stick the housing 300 with a proper glue. The cable conveying the output signals 302 may be secured along the pipe with the aid of one or more collars 8.

 Typically, the control box 3 comprises, on its front face, a display member 31 (for example liquid crystal or plasma), a green indicator light 33, for example, indicating the start-up of the pump 5 ( marked "OK" for example) and an alarm light 34, red as usual (marked "ALARM" for example). The display member 31 has a dual function: alternating display of the time and temperature of the measured water. The (re) setting time and the passage from one display mode to another is done by pressing a push button 32. In a conventional manner, it can be provided that after a predetermined period of time following a reset time, the display member 31 automatically switches to temperature display mode.

 The electronic control circuits forming, with the temperature sensor, the bulk of the device according to the invention are grouped together on a printed circuit board 7, of conventional type per se and advantageously meeting standards in force in a given country. for example, compliant with CE standards for France. The various components used advantageously meet industrial type specifications. They must in particular operate in a temperature range of -40 OC to +50 OC.

 The power supply of the circuits implanted on the printed circuit board 7 is provided by a transformer 77 connected to the mains (for example on a 220 V socket, not shown) which delivers a very low voltage, typically 6 V. It is rectified and regulated by conventional circuits, under the unique reference 76. The transformer 77 is of a high insulation type (typically greater than or equal to 4000 V) and is protected by a varistor (for example having a voltage of breakdown of 275 V) and a fuse, typically 3 A. This latter value is dependent on the rated power used. These provisions are useful for the circuits to comply with the safety standards in force.

They naturally depend on the specific application and the country of use.

 The electronic control and signal processing circuits according to the invention are realized, in the example described in FIG. 3, using three integrated circuits: a microcontroller 70, a time base 71 and a clock. called real time. As is well known, these electronic components communicate with each other via a bidirectional data transmission bus. The components of the card, in particular the microcontroller 70, receive signals from the temperature sensor 30 and the push button 32. They develop control and signaling signals transmitted to the indicator light 33, to the display member 31, for the display of the temperature measured by the sensor 30, and electromagnetic relays 74 and 75, control of the pump 5 and control of the alarm indicator 34, respectively.

 The output signals are transmitted to the receiving members directly or via amplifiers or conventional adaptation circuits not shown. Similarly, if the temperature sensor 30 does not include analog-to-digital conversion circuits, and amplification and / or adaptation circuits, such circuits are provided on the card 7, the microcontroller 70 only processing standard digital binary signals. It is possible to provide a specialized port (not shown) comprising conversion circuits. In the opposite case, one can go through a connection on a serial port, for example.

 The configuration of the circuits of an exemplary device according to a preferred embodiment being recalled, we will now describe the main features of the water treatment process of the pool 1 according to the invention in an implementation mode particular.

 According to a first important characteristic of the invention, the temperature of the water of the pool 1 is periodically measured by means of the sensor 30. The output signals Vs are proportional to the amplitude of the temperature. measured and they include information on the sign of this temperature. After conversion as necessary, they are transmitted to the microcontroller 70 for processing and elaboration of the control commands of the brewing pump 5. In practice, the measured temperatures are taken into account at a minimum rate of predefined time periods. , for example at the beginning of each brewing period or every hour.

The measurement is validated after a delay time determined after the beginning of the brewing so that it indicates the actual temperature of the pool water, for example after 5 minutes.

 According to a second important characteristic of the invention, the daily stirring time of the water, and therefore of filtration and addition of disinfecting agent depends on the different temperatures recorded and processed by the microcontroller 70. The total daily stirring duration thus determined is then spread over predefined time ranges according to pre-established treatment program options.

 In a preferred embodiment, a predetermined maximum number of ranges, for example a maximum number of three daily ranges, is defined, it being understood that the duration of each range is of variable amplitude, or even zero, depending on the selected program. This individual duration is also determined by program, so that the sum of the individual durations reaches the desired overall daily processing time. It is also expected that each duration in a given time range is at least sufficient to circulate in the treatment circuit a total volume of water substantially equivalent to the capacity of the pool, and furthermore that each is equal to a whole number time slots all equal to a unit duration, which will be one hour of real time for example.

 To fix the ideas, and without limiting in any way the scope of the invention, the table below provides an example of a series of pre-established programs, indicating for each the daily duration of brewing according to the temperature recorded by the sensor and the distribution of this total duration in numbers of one-hour slots (or sequences) as they are spread over three time slots respectively in the morning, afternoon and the evening of every day. In practice, the selection of the program is made from a comparison between the temperature measured and taken into account and contiguous predefined temperature ranges.

Range OC Duration Distribution Program
Temp. Morning AM Daily evening
OC h / j Number of sequences
<3 24 Permanent operation (r ALARM)
3.1 to 6 2 2 0 0 8h - 10h
6.1 to 9 3 3 0 0 8h - 11h
9.1 to 12 4 4 0 0 8h - 12h
12.1 to 15 5 3 2 0 8h-llh, 14h-16h
15.1 to 18 6 3 3 0 8h-llh, 14h-17h
18.1 to 21 7 4 3 0 8h-12h, 14h-17h
21.1 to 23 8 4 4 0 8h-12h, 14h-18h
23.1 to 26 10 2 4 4 3-5h, 8-12h, 14-18h
26.1 to 28 12 4 4 4 3-7h, 8-12h, 14-18h
28.1 to 30 14 4 4 6 3-7h, 8-12h, 14-20h
30.1 to 31.9 16 4 4 8 3-7h, 8-12h, 14-22h
2 32 Permanent operation (r ALARM)
Examination of the table shows that extreme climatic conditions or conditions of use of the pool 1, which result in a temperature of the water T, ie below a first threshold (T <3 OC), above a second threshold (T 2 32), lead to permanent mixing of the water and a maximum daily filtration period of 24 h. The detection of these extreme conditions also triggers an alarm. The microcontroller 70 will generate an alarm signal transmitted to an electromagnetic relay 74 which supplies the alarm indicator 34. This indicator 34 is connected via the contacts of the relay 74 to the mains. The indicator light 34 remains on permanently. As needed, other types of alarms, visual and / or audible, may be provided.

 Concurrently with the alarm signal, the microcontroller 70 generates a signal transmitted to a second electromagnetic relay 75 which connects the electric motor of the pump 5 to the mains. As indicated above, the alarm signal is permanent until the above extreme conditions disappear or until an authorized operator has stopped the device by any suitable means switch, etc. (not shown) In all other cases, which will be considered as a normal operation, the indicator 34 is not powered. The total filtration time is determined by a pre-recorded program in the microcontroller 70 and distributed over the predefined distinct time slots. The daily duration of normal treatment is between minimum and maximum values (2 hours and 16 hours, respectively, in the example described).

 The microcontroller 70 cooperates with two other circuits, 71 and 72, as indicated. Depending on the temperature measured, the microcontroller 70 generates binary control words which are transmitted to the circuit 71.

The latter is a programmable time base that generates a signal of variable duration, according to the binary configuration of the command words presented at its input. A specific configuration forces the timebase to generate a permanent output signal. The output signals are transmitted to the relay 75 directly or via amplification and / or shaping circuits (not shown). If the daily cycle is divided into distinct ranges, as is the case in the preferred embodiment of the invention (three ranges in the example described), the microcontroller 70 transmits a control word to the time base. at the beginning of each beach.

 It is understood that the duration of one operation over a given time period may be zero, as shown in the table above. Outside the extreme low and high conditions, each time the pump 5 operates, a signal is generated by the microcontroller 70 and transmitted directly or via an amplifier and / or a shaping circuit (not shown) to the indicator light 33.

 The third circuit, 72, is constituted by a real time clock. Indeed, this circuit 72 is powered autonomously, by battery or battery, so as to determine the time that elapses in case of power failure, thus ensuring a timekeeping function. It is desirable that the time drift of this circuit be limited, typically a maximum drift of 2 minutes per month.

Indeed, during winter periods and for private pools in particular, in case of power failure for one reason or another, this state may continue due to the absence of the owner of the premises (holiday home, etc.). This arrangement also makes it possible to set the time at the factory on a new device. When laying on site, the customer or installer does not have to worry about setting the time.

 In any case, when the mains power is restored, the device is automatically returned to normal operation. As soon as the microcontroller 70 processes a temperature measurement at the beginning of an operating phase of the stirring pump, the test carried out determines the choice of a new stirring program.

 As long as the successively measured temperatures remain within the same range, for example between 18.1 and 21 ° C. in the examples shown in the table, the microcontroller 70 retains the same program for mixing and filtering the water of the water. the pool 1. The pump 5 is fed according to the same predefined rhythms: on a daily basis of 7 hours, divided into two periods of duration respectively 4 and 3 hours, in the example chosen. Otherwise, for example if the measured temperature rises to 24 OC, a new program is selected: total daily stirring time of 10 hours, divided into three periods of 2, 4 and 4 hours, respectively.

 As indicated above, the various operating states are displayed by the indicators 33 (normal operation of the pump 5) and 34 (alarm), as well as the display 31 (measured temperature or time display). . It should be noted that if the sensor 30 must be able to detect temperature variations typically of the order of a tenth of a degree, or even less, it is not necessary for the display member 31 to display the temperature with such precision. Advantageously, a display unit comprising two seven-segment digital indicators is used, which gives a sufficient indication (+ 1 OC) of the temperature of the water, which is measured with greater precision.

 Apart from the automatic operating mode controlled by the temperature detection, a preferred variant of implementation of the invention provides to be able to switch to a manual mode free of this regulation. The pushbutton 32 is multifunctional and it can also fulfill this function. It is enough to provide a discriminatory mode of support (duration of manual press on the button higher than a predetermined threshold, for example) so that one passes in manual mode and that one forces the operation of the pump in regime continued.

 Programming of the device can be done at the factory once and for all. As is known, a microcontroller is usually associated with fixed memory circuits and RAM circuits. A fixed memory may consist of a ROM type memory, read-only and non-modifiable, or a programmable memory type PROM, EPROM, etc. These memories can be embodied in various forms depending on how they can be programmed: data logging by electrical signals, erasure by ultraviolet light and re-recording, etc. Certain types of memories allow reprogramming on site, using specialized portable devices. In all cases, it is these memories that store the software modules and instructions necessary for the proper operation of the microcontroller and the realization of specific programs.

 In the case of the method of the invention as implemented here, the information required to develop the operating programs of the pump 5, as shown in the table above, is stored. The temperatures measured by the sensor 30 are compared with those pre-stored in memory. The usual process is to address memory locations by address words. In the application concerned by the invention, these address words are derived from the amplitude (and the sign) of the measured temperatures. The data stored in the addressed memory positions is used to define the overall mixing times and their eventual distribution into individual ranges.

 In another alternative embodiment, the programming could be performed by the user, completely free or by selection of predefined ranges. The programming data could then be inputted by means of keys or a keyboard arranged, for example, on the control box 3, or else by means of a remote control, for example with infrared beams, acting on an electro-optical sensor disposed on the front face of the housing or inside thereof, on the card 7.

 In the latter case, it is of course necessary to be able to open the housing cover 3. For all these variants, it is necessary to provide a random access memory, for example of the RAM type, that is to say random access, that one can write and read at will, or registers of memories. These storage devices must be provided with an autonomous power supply, by battery or battery, to be able to keep the programs recorded during power outages.

 The foregoing description clearly explains how the invention achieves the goals it has set for itself. In particular, it saves material and electrical energy by minimizing and optimizing filtration periods. It also allows a great flexibility of operation, without requiring complex measures. Simple temperature measurements make it possible to determine the filtration times and to divide them as much as possible on a daily basis. The components used are in common use and do not involve high costs.

 In addition, the components entirely specific to the invention are few. Mounting the device according to the invention in an existing installation does not pose particular problems and it is easy.

 It should be clear, however, that the invention is not limited to the only examples of embodiments explicitly described, particularly in relation to FIGS. 1 to 3.

 In particular, the usable components and numerical values that have been specified are in close correspondence with the specific application envisaged. Similarly, the method is not limited to a daily schedule, or to a specific number of distinct ranges. Temperature measurements can be made at times that do not necessarily coincide with hours, they can even be performed continuously.

 Instead of using a microcontroller, it is also possible to use a conventional microprocessor, or even a microcomputer used elsewhere for other tasks, especially if it is a major installation (municipal swimming pool, etc.). and generally any registered program digital data processing apparatus.

 The alarm circuits, as has been specified, can be of various kinds: visual alarm, audible alarm, etc. The alarm actuation signals can have a direct effect (locally), but can also be echoed remotely by a remote alarm system, for example via a conventional telephone link. The system may comprise pool water heating elements, actuated in response to an alarm due to a measured temperature lower than the minimum admissible temperature, ie 3 OC in the example described. The reheat control may be local or be transmitted remotely, for example by the aforementioned telephone link.

 it must also be clear that the invention can not be limited to the sole application to private pools, that is to say a priori of modest dimensions and relatively little used. It finds application for other types of pools or similar facilities pools of spa centers, etc.

Claims (13)

 1. A method of maintaining the water of a pool (1) by adding a disinfecting agent, characterized in that it consists essentially in automatically controlling said addition of disinfecting agent according to a detection of the temperature of said water.  2. Method according to claim 1, characterized in that said addition of disinfecting agent is carried out by treatment of water in a closed circuit bypass of the pool, in which the water is circulated at a constant rate, by sampling and recycling in the pool, during a period of operation which is slaved to said temperature detection.  3. Method according to claim 2, characterized in that said circulation is carried out using a stirring pump (5) constant flow whose operation is provided according to pre-established programs, distinguished in particular by a number each day of brewing sequences of the same unit duration, among which the choice is determined automatically according to predefined contiguous ranges of temperatures measured according to that in which the temperature determined by said temperature detection is located.  4. Method according to claim 3, characterized in that the temperature detection is performed periodically on said processing circuit at the beginning of a brewing sequence with a delay time to validate a measurement of the temperature of the water in the pool determines the brewing time to ensure in a given time, including the daily duration.  5. Method according to claim 3 or 4, characterized in that when the temperature detection reveals a measured value which is below a minimum risk of freezing and / or above a maximum value, said pump operates continuously and an alarm is generated.  6. Method according to any one of claims 2 to 5, characterized in that said addition of disinfectant is effected from a support roller, interposed on said processing circuit, which it is released gradually in contact with circulating water.  7. Method according to any one of claims 2 to 5, characterized in that said addition of disinfectant is effected by electrolysis of the circulating water in said treatment circuit, which contains a chloride such as chlorine. sodium, so that electrolysis produces molecular chlorine.  8. Method according to any one of claims 2 to 7, characterized in that said stirring pump draws the water circulated in said circuit by suction partly to the bottom of the pool and partly on the surface, the two parts being mixed upstream of the temperature detection, so that the measured temperature which controls the determination of the treatment times is representative of an average temperature prevailing in the pool.  9. Device for carrying out the method according to any one of claims 1 to 8, characterized in that it comprises at least one pump (5) for mixing said water, sucking the water from the pool for l to recycle after treatment in a closed circuit (60) of treatment by filtration and regeneration by addition of disinfecting agent bypassing the pool, and, mounted on said circuit, a sensor (30) for detecting the temperature of the circulating water, generating an electrical output signal (VS) representative of the measurement of said temperature, a digital data processing apparatus (70) making comparisons between the measured temperature and predefined contiguous temperature ranges, so as to generate control signals which select an operating time of said pump (5), distributed over time ranges according to pre-established programs, and actuating means (75) of the pump ( 5) controlled by said control signals.  10. Device according to claim 9, characterized in that said digital data processing apparatus comprises, implanted on a printed circuit board (7), power supply circuits (76), a microcontroller (70) receiving signals. representing said temperature measured by said sensor (30) and provided with storage means of a processing program, an electronic time base (71) for generating signals corresponding to the operating times and ranges of the brewing pump ( 5), and clock circuits (72), with permanent power supply, able to keep track of the elapsed time in case of failure of said power supply circuits.  11. Device according to claim 9 or 10, characterized in that said actuating means of the pump (5) comprises an electromagnetic relay (75) supplying the pump (5) with electrical energy.  12. Device according to any one of claims 9 to 11, characterized in that it comprises a control panel (3) comprising a member (31) for alternating display of said measured temperature or time, a light ( 33) of said stirring pump, an alarm indicator (34) actuated when said measured temperature is below a minimum value or above a maximum value, and a multi-functional push button (32). ) enabling setting of said digital data processing apparatus (70) and forcing the operation of the stirring pump (5) in manual mode.  13. Device according to any one of claims 9 to 12, characterized in that it comprises means for generating a visual alarm (75, 34), sound, local or via a remote monitoring device.