Method and device for controlling at least one concealing device

Abstract

The invention relates to a method and a control system for at least one motorized roller shutter of at least one opening in a room of a building. According to the invention: - weather forecasts are obtained from a server of a telecommunications network, including temperature forecasts and information representative of forecast values ​​of solar radiation power for at least one day, - the interior temperature of the building is obtained (E500), - the maximum temperature of the forecast for the day is compared (E502) to a value representative of a first predetermined temperature threshold, - the interior temperature of the building is compared (E502) to a value representative of a second predetermined temperature threshold, - the calculated ratio is compared (E502) with a decision threshold, - the shading device is controlled according to the comparisons (E507).

Description

TECHNICAL FIELD

[0001] The present invention relates to a method and device for controlling at least one device for concealing at least one opening of a room in a building.

[0002] More particularly, the invention lies in the field of managing the temperature of a room in a building by controlling a device for concealing at least one opening. STATE OF PRIOR ART

[0003] The energy contribution of solar radiation is a significant element in a room. This helps reduce the need for fossil or electrical energy to heat the room in winter but can increase the need for fossil or electrical energy to cool the room in summer. STATEMENT OF THE INVENTION

[0004] The invention aims to optimize the energy input from solar radiation, which is a significant element in a room, so as to ensure that the fossil or electrical energy requirements for heating or cooling the room are reduced.

[0005] According to a first aspect of the invention, the invention relates to a method for controlling at least one motorized roller shutter of at least one opening of a room of a building, characterized in that the method comprises the steps of: obtaining, from a server of a telecommunications network, weather forecasts comprising temperature forecasts and information representative of forecast values ​​of the power of solar radiation for at least one day, obtaining the interior temperature of the building, comparing the maximum temperature of the forecasts for the day with a value representative of a first predetermined temperature threshold, comparing the interior temperature of the building with a value representative of a second predetermined temperature threshold, calculating a ratio of the value of the energy provided by solar radiation for the day to the difference between the value representative of the second predetermined temperature threshold and the value of the interior temperature of the building, comparing the calculated ratio with a decision threshold,if the maximum temperature of the forecast for the day is greater than or equal to the representative value of the first predetermined temperature threshold and if the interior temperature of the building is greater than or equal to the representative value of the second predetermined temperature threshold, control of the blackout device, if the maximum temperature of the forecast for the day is greater than or equal to the representative value of the first predetermined temperature threshold and if the interior temperature of the building is less than the representative value of the second predetermined temperature threshold and if the calculated ratio is greater than or equal to the decision threshold, control of the blackout device.

[0006] Correlatively, the invention relates to a system for controlling at least one motorized roller shutter of at least one opening of a room of a building, characterized in that the system comprises: means for obtaining, from a server of a telecommunications network, weather forecasts comprising temperature forecasts and information representative of forecast values ​​of the power of solar radiation for at least one day, means for obtaining the interior temperature of the building, means for comparing the maximum temperature of the forecasts for the day with a value representative of a first predetermined temperature threshold, means for comparing the interior temperature of the building with a value representative of a second predetermined temperature threshold, means for calculating a ratio of the value of the energy provided by solar radiation for the day to the difference between the value representative of the second predetermined temperature threshold and the value of the interior temperature of the building, means for comparing the calculated ratio with a decision threshold,means for controlling the occultation device if the maximum temperature of the forecasts for the day is greater than or equal to the representative value of the first predetermined temperature threshold and if the interior temperature of the building is greater than or equal to the representative value of the second predetermined temperature threshold, means for controlling the occultation device if the maximum temperature of the forecasts for the day is greater than or equal to the representative value of the first predetermined temperature threshold and if the interior temperature of the building is less than the representative value of the second predetermined temperature threshold and if the calculated ratio is greater than or equal to the decision threshold.

[0007] Thus, the present invention makes it possible to determine the days for which the occultation device must be controlled so as to limit unnecessary movements of the occultation devices and improve the visual comfort of the occupant.

[0008] According to another aspect of the invention, the values ​​of the power of the solar radiation are obtained from a transposition of cloudiness predictions obtained via the server.

[0009] According to another aspect of the invention, the method further comprises the steps of: non-control, for the whole day, of the blackout device if the maximum temperature forecast for the day is lower than the representative value of the first predetermined temperature threshold, non-control, for the whole day, of the blackout device if the maximum temperature forecast for the day is greater than or equal to the representative value of the first predetermined temperature threshold and if the interior temperature of the building is lower than the representative value of the second predetermined temperature threshold and if the calculated ratio is lower than the decision threshold.

[0010] Thus, the present invention makes it possible to determine the days for which the occultation device must be controlled so as to limit unnecessary movements of the occultation devices and improve the visual comfort of the occupant.

[0011] According to another aspect of the invention, the value representative of the first predetermined threshold is equal to a predetermined temperature threshold plus a value defined by the occupant of the building.

[0012] Thus, the present invention takes into account the needs and feelings of the occupant.

[0013] According to another aspect of the invention, the value defined by the occupant of the building is added to the difference between the value representative of the second predetermined temperature threshold and the value of the interior temperature of the building.

[0014] Thus, the present invention takes into account the needs and feelings of the occupant.

[0015] According to another aspect of the invention, the control of the occultation device is carried out by determining a value of a variable called season determined by comparing the temperature forecast to a fourth and a fifth predetermined thresholds, the value of the variable called season being used to determine the value of a variable representative of a minimum temperature and the value of a variable representative of a maximum temperature.

[0016] Thus, the present invention promotes the supply of solar energy during part of the year, avoids solar input during periods when temperatures are high and is particularly suitable for periods when temperatures and sunshine are very fluctuating.

[0017] According to another aspect of the invention, the value of a criticality threshold is determined by comparing the interior temperature of the building to the value of the variable representative of a minimum temperature and to the value of the variable representative of the maximum temperature.

[0018] According to another aspect of the invention, the value of the criticality threshold and the value of the variable called season are used to determine the value of a first and a second threshold of energy provided by solar radiation.

[0019] According to another aspect of the invention, the control of the occultation device is carried out so that the occultation device allows the solar radiation to pass through a part of the surface of the opening, the part of the surface of the opening being determined by comparing the value of the energy provided by the solar radiation during a predetermined duration of less than 4 hours.

[0020] Thus, the present invention anticipates the quantity of energy that will arrive through an opening surface and only controls the occultation devices in strictly necessary scenarios, which makes it possible to improve visual and thermal comfort.

[0021] According to another aspect of the invention, the predetermined duration is equal to 3 hours. The invention also relates to computer programs stored on an information medium, said programs comprising instructions making it possible to implement the methods described above, when they are loaded and executed by at least one computer system. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above-mentioned and other features of the invention will become more clearly apparent from the following description of an exemplary embodiment, said description being made in relation to the accompanying drawings, among which: [ Fig. 1 ] represents a building in which the present invention is implemented; [ Fig. 2 ] represents a block diagram of a device for controlling at least one device for concealing at least one opening according to the present invention; [ Fig. 3 ] represents a block diagram of an internet gateway used in the present invention; [ Fig. 4 ] represents an example of an algorithm executed by the gateway according to the present invention; [ Fig. 5 ] represents an example of an algorithm executed by the controller according to the present invention; [ Fig. 6 ] illustrates an example of a table of obtained weather forecasts; [ Fig. 7 ] illustrates the example of a table interpolated from the obtained weather forecasts; [ Fig. 8 ] illustrates an example of a solar radiation power forecast table obtained according to the present invention. DETAILED PRESENTATION OF IMPLEMENTATION METHODS

[0023] There Fig. 1 represents a building in which the present invention is implemented.

[0024] The building comprises at least one room 10 having at least one opening 103 oriented in a direction such that solar radiation contributes to heating the room 10.

[0025] The opening 103 can be concealed by a concealment device 101 such as, for example, a motorized roller shutter or a motorized blind.

[0026] Opening 103 is in a gable of the building, for example and without limitation facing south, east or west.

[0027] Opening 103 may also be an opening in the roof of the building, for example and without limitation facing south, east or west.

[0028] According to the present invention, a control device 100, or controller, controls the at least one occultation device 101.

[0029] Connected to the controller 100 are an internet gateway, a temperature sensor 106 of the room 10 or the building, a clock 107, a configuration device 150, and at least one blackout device 101.

[0030] The clock 107 is a clock capable of providing time stamp information making it possible to determine the time and day and can be integrated into the controller 100.

[0031] The 110 gateway is a home gateway connected to an Internet-type network.

[0032] Via the Internet network, the gateway 110 obtains weather forecasts to estimate an impact of weather conditions on the thermal comfort of the building 10. More precisely, the gateway 110 estimates an energy input provided by solar radiation and not an energy power. The results of the calculations and requests made by the gateway 110 are transferred to the controller 100, for example every hour.

[0033] The configuration device 150 allows an occupant of the building to adjust a sensitivity parameter of the management algorithm of at least one blackout in order to choose a compromise between thermal comfort and visual comfort.

[0034] For example, the occupant is offered 5 selection levels. A first level called "Very Low" sets a variable marked Force equal to the value 2, a second level called "Low" sets the variable marked Force equal to the value 1, a third level called "Moderate" sets the variable marked Force equal to the value 0, a fourth level called "High" sets the variable marked Force equal to the value -1 and a fifth level called "Very High" sets the variable marked Force equal to the value -2.

[0035] The Force variable allows, as will be described later, to adjust the maximum temperature threshold noted T_ext_threshold of the room during the day, to adjust the desired comfort threshold and to adjust two criticality thresholds noted MaxT and MinT.

[0036] The default choice is moderate, which corresponds to a "Strength" = 0. The "Moderate" mode represents the compromise between thermal comfort and visual comfort. The solar optimization algorithm will seek not to exceed the desired thermal comfort threshold, which is, for example, equal to 27°C.

[0037] If the occupant wants more light in the room, at the expense of thermal comfort, they can choose a heat protection sensitivity level that is "low" or "very low". In this case, the thermal comfort threshold is set at 28°C for the "low" strength and 29°C for the "very low" strength (+2°C).

[0038] Conversely, if the occupant wants to keep the interior cool, they can choose "very high" sensitivity, for example. As a result, the algorithm is much more responsive and protective, keeping the temperature below 25°C whenever possible.

[0039] There Fig. 2 represents a block diagram of a device for controlling at least one device for concealing at least one opening according to the present invention.

[0040] The controller 100 is adapted to carry out, from one or more software modules, the steps of the algorithm as described with reference to the Fig. 5 .

[0041] The controller 100 comprises a communication bus 201 to which are connected a processor 200, a non-volatile memory 202, a random access memory 203, possibly a radio interface 204 allowing communication with the configuration device 150 and the gateway 110, a control interface 206 allowing control of the occultation device 101, and a sensor interface 208 to which the sensor 106 and the clock 107 are connected.

[0042] The non-volatile memory 202 stores the software module(s) implementing the invention, as well as the data making it possible to implement the algorithm as described with reference to the Fig. 5 .

[0043] More generally, the programs according to the present invention are stored in a storage means. This storage means is readable by the microprocessor 200. This storage means is integrated or not into the controller 100, and can be removable.

[0044] When the controller 100 is powered up, the software module(s) according to the present invention is or are transferred into the RAM 203 which then contains the executable code according to the present invention as well as the data necessary for implementing the invention.

[0045] Thus, all or part of the algorithm and steps described herein may be implemented in software form by executing a set of instructions by a programmable machine, such as a DSP (Digital Signal Processor) or a microcontroller or a processor. All or part of the algorithm and steps described herein may also be implemented in hardware form by a machine or a component (chip), such as an FPGA (Field-Programmable Gate Array) or an ASIC (Application-Specific Integrated Circuit). Thus, the controller 100 comprises electronic circuitry adapted and configured to implement the behaviors, algorithm and steps described herein.

[0046] There Fig. 3 represents a block diagram of an internet gateway used in the present invention.

[0047] The gateway 110 is adapted to carry out, from one or more software modules, the steps of the algorithm as described with reference to the Fig. 4 .

[0048] The gateway 110 comprises a communication bus 301 to which are connected a processor 300, a non-volatile memory 302, a random access memory 303, a radio interface 304 allowing communication with the controller 100 and a network interface 306 allowing access to an Internet type network.

[0049] The non-volatile memory 302 stores the software module(s) implementing the invention, as well as the data making it possible to implement the algorithm as described with reference to the Fig. 4 .

[0050] More generally, the programs according to the present invention are stored in a storage means. This storage means is readable by the microprocessor 200. This storage means is integrated or not into the gateway 110, and can be removable.

[0051] When the gateway 110 is powered up, the software module(s) according to the present invention is or are transferred into the RAM 303 which then contains the executable code according to the present invention as well as the data necessary for implementing the invention.

[0052] Thus, all or part of the algorithms and steps described herein may be implemented in software form by executing a set of instructions by a programmable machine, such as a DSP (Digital Signal Processor) or a microcontroller or a processor. All or part of the algorithms and steps described herein may also be implemented in hardware form by a machine or a component (chip), such as an FPGA (Field-Programmable Gate Array) or an ASIC (Application-Specific Integrated Circuit). Thus, the gateway 110 comprises electronic circuitry adapted and configured to implement the behaviors, algorithms and steps described herein.

[0053] There Fig. 4 represents an example of an algorithm executed by the gateway according to the present invention.

[0054] This algorithm is described in an example in which it is executed by the processor 300.

[0055] In step E400, the processor 300 obtains a weather forecast via the network interface 306. There are several weather services available that provide the forecasts and current measurements of weather conditions as well as cloud cover (or cloudiness) for a location. For example, the weather forecast service is Openweather or Meteoblue or Green Forecast or Steadysun. Subsequently, the present invention is described in the context of a use of the Openweather service. This service provides the outside air temperature (current value and forecast) and cloud cover (current value and forecast).

[0056] There Fig. 6 illustrates an example of a table of obtained weather forecasts.

[0057] In the Fig. 6 , the processor 300 makes a request to obtain cloud cover and outdoor temperature forecasts for the next 5 days, for example with a time step of 3 hours. This data is stored in the table of the Fig. 6 .

[0058] In the next step E401, the processor 300 performs an interpolation of the weather forecasts to obtain, for example, temperature and cloudiness values ​​at an hourly time step (for example for each hour), for example by performing linear approximations / interpolations between two values. An example of a table obtained is given with reference to the Fig. 7 .

[0059] There Fig. 7 illustrates the example of a table interpolated from the obtained weather forecasts.

[0060] In the next step E402, the processor 300 calculates a value of the power of the solar radiation in a clear sky, i.e. a value of the power of the theoretical solar radiation without cloudiness.

[0061] The value of the power of solar radiation under clear skies is for example obtained by executing the algorithm as described in the publication by Christelle Rigollier, Olivier Bauer, Lucien Wald, On the clear sky model of the ESRA - European Solar Radiation Atlas - with respect to the heliosat method, Solar Energy, Volume 68, Issue 1, 2000, Pages 33-48, ISSN 0038-092X, .

[0062] This model provides the horizontal irradiance vectors as a function of time and building location obtained by Gateway 110. It also uses the binding turbidity factor for the air mass disclosed in the aforementioned publication.

[0063] From a universal time vector, the longitude of the building (in radians and positive to the East), the latitude of the building (in radians and positive to the North), the altitude of the building, (in meters relative to the sea), the processor 300 obtains the direct horizontal irradiance, in W / m 2 < Bh _ClearSky , the diffuse horizontal irradiance, in W / m 2 < Dh _ClearSky and the global horizontal irradiance, in W / m 2 < , Gh clearsky.

[0064] In step E403, the processor 300 takes into account the different cloudiness values ​​included in the table interpolated in step E401. Thus, for each hour, the processor 300 evaluates a value of the power of the horizontal solar radiation Gh from the cloudiness C according to the following formulas: If C=100%, Gh= Dh_cieiciair; If C=0%, Gh=Dh Clear_Sky +Bh Clear_Sky If C=X%, Gh=Dh Clear_Sky +(100-X) / 100×Bh Clear_Sky

[0065] In a second step, the processor 300 uses, for each hour, the evaluation of the power of the horizontal solar radiation Gh in order to refine the estimation of the diffuse component. Indeed, for the transposition of the power of the solar radiation on surfaces other than horizontal, it is particularly interesting to know the value of the power of the global horizontal solar radiation and the share of the power of the direct and diffuse solar radiation.

[0066] For this, the processor 300 uses a model called Erbs as described in the publication by F.J. Batlles, M.A. Rubio, J. Tovar, F.J. Olmo, L. Alados-Arboledas, Empirical modeling of hourly direct irradiance by means of hourly global irradiance, Energy, Volume 25, Issue 7, 2000, Pages 675-688, ISSN 0360-5442, which estimates the value of the power of diffuse horizontal solar radiation from a sky clarity index denoted Kt as described in the publication by Duffie, J.A. and Beckman, W.A. (2013) Solar Engineering of Thermal Process. 4th Edition, John Wiley & Sons, Inc., Hoboken.

[0067] Thus, the processor 300 obtains a value of the energy provided by the diffuse horizontal solar radiation Dh_Erbs for each hour.

[0068] In step E404, the processor 300 projects the value of the power of the solar radiation onto a facade of the building 10.

[0069] In other words, the processor 300 determines a direct, diffuse and global irradiance incident on a plane as a function of time (UT) and for the location of the building defined by its longitude, latitude and altitude using a model as described in the publication by Richard Perez, Robert Seals, Pierre Ineichen, Ronald Stewart, David Menicucci, A new simplified version of the perez diffuse irradiance model for tilted surfaces, Solar Energy, Volume 39, Issue 3, 1987, Pages 221-231, ISSN 0038-092X,

[0070] The processor 300 thus determines a direct irradiance BI on the facade, a diffuse irradiance DI on the facade and a global irradiance on the plane GI on the facade.

[0071] The processor 300 thus obtains, for each hour, a forecast of the power of the solar radiation as shown in Fig. 8 .

[0072] There Fig. 8 illustrates an example of a table of predictions of values ​​of the power of the incident solar radiation obtained according to the present invention.

[0073] In step E405, the processor 300 determines the value of the maximum temperature over the next 24 hours from the interpolated table.

[0074] This algorithm is for example executed every hour and the data obtained is transferred to the controller 100.

[0075] There Fig. 5 represents an example of an algorithm executed by the controller according to the present invention.

[0076] This algorithm is described in an example in which it is executed by the processor 200.

[0077] Steps E500 to E502 are steps for deciding whether or not to execute the control of at least one blackout device for a day. Steps E500 to E502 are preferably executed at sunrise, the time of which is obtained from the clock 107. Step E503 is preferably executed at sunrise, step E504 is preferably executed at sunrise and each time the occupant modifies the value of a variable called Force. The other steps of the algorithm are executed every hour or upon each reception of an update of the indoor temperature when the control of at least one blackout device is decided for the day.

[0078] In step E500, the processor 200 obtains a measurement of the indoor temperature Tint of the building 10 from the temperature sensor 106 and a measurement of the outdoor temperature from the data obtained from the gateway 110.

[0079] In step E501, the processor 200 obtains the value of the variable Force defined by the occupant using the parameterization device 150.

[0080] In step E502, the processor 200 determines whether solar protection by the occultation devices must be implemented or not. For this, the processor 200 checks whether the maximum temperature included in the table of the Fig. 6 is less than the sum of a first predetermined threshold T_ext_threshold and the value of the variable Force.

[0081] If so, the processor 200 interrupts the execution of the present algorithm.

[0082] If not, the processor 200 checks whether the interior temperature function Tint is greater than or equal to the sum of a second predetermined threshold T_int_threshold and the value of the variable Force. If so, the processor 200 goes to step E503.

[0083] If not, the processor 200 checks whether the ratio of the total sum of the values ​​of the power of the solar radiation for each hour of the day noted E_solar_day to the sum of the second predetermined threshold T_int_threshold and the value of the variable Force reduced by the value of the measured interior temperature Tint is greater than or equal to a third decision threshold CT_threshold. If so, the processor 200 goes to step E503. If not, the processor 200 interrupts the execution of the present algorithm.

[0084] The third decision threshold CT_threshold is for example equal to 850, the second predetermined threshold T_int_threshold is equal to 27 degrees Celsius and the third predetermined threshold T_ext_threshold is equal to 23.

[0085] In step E503, the processor 200 determines the value of a variable called season from the value of the external temperature T_ext and a set of predetermined thresholds.

[0086] If the outdoor temperature T_ext is lower than a fourth predetermined threshold threshold_winter, the value of the season variable is set to 0. If the outdoor temperature T_ext is higher than a fifth predetermined threshold threshold_summer, the value of the season variable is set to 1. If the outdoor temperature T_ext is between the fourth and fifth predetermined thresholds, the value of the season variable is set to 0.5 (i.e., mid-season). For example, threshold_winter is equal to 10 degrees Celsius and threshold_summer is equal to 16 degrees Celsius.

[0087] In step E504, the processor 200 determines the value of a variable representative of a minimum temperature MinT and the value of a variable representative of a maximum temperature MaxT as a function of the value of the season variable.

[0088] If the season variable is equal to 0, the processor 200 sets the value of the MinT variable equal to 22 degrees Celsius plus the value of the Force variable and sets the value of the MaxT variable equal to 24 degrees Celsius plus the value of the Force variable. If the season variable is equal to 0.5 or 1, the processor 200 sets the value of the MinT variable equal to 23 degrees Celsius plus the value of the Force variable, and sets the value of the MaxT variable equal to 25 degrees Celsius plus the value of the Force variable.

[0089] In the next step E506, the processor 200 determines a value of a criticality level. If the value of the interior temperature Tint of the building 10 is lower than the value of the variable MinT, the processor 200 sets the value of the criticality level to 1.

[0090] If the value of the indoor temperature Tint of building 10 is greater than or equal to the value of the variable MinT and less than the value of the variable MaxT, the processor sets the value of the criticality level to 2.

[0091] If the value of the indoor temperature Tint of building 10 is greater than or equal to the value of the variable MaxT, the processor sets the value of the criticality level to 3.

[0092] At this same step, the processor 200 determines the value of a first energy threshold provided by the solar radiation SE1 and the value of a second energy threshold provided by the solar radiation SE2 as a function of the values ​​of the season and criticality variables.

[0093] If the season variable is equal to 0 and the criticality level is equal to 1, the processor sets the value of the first energy threshold provided by solar radiation SE1 to the value 5000 and sets the value of the second energy threshold provided by solar radiation SE2 to the value 5000.

[0094] If the season variable is equal to 0 and the criticality level is equal to 2, the processor sets the value of the first energy threshold provided by solar radiation SE1 to the value 1200 and sets the value of the second energy threshold provided by solar radiation SE2 to the value 1500.

[0095] If the season variable is equal to 0 and the criticality level is equal to 3, the processor sets the value of the first threshold of energy provided by solar radiation SE1 to the value 900 and sets the value of the second threshold of energy provided by solar radiation SE2 to the value 900.

[0096] If the season variable is equal to 0.5 or 1 and the criticality level is equal to 1, the processor sets the value of the first energy threshold provided by solar radiation SE1 to the value 5000 and sets the value of the second energy threshold provided by solar radiation SE2 to the value 5000.

[0097] If the season variable is equal to 0.5 or 1 and the criticality level is equal to 2, the processor sets the value of the first energy threshold provided by solar radiation SE1 to the value 900 and sets the value of the second energy threshold provided by solar radiation SE2 to the value 1200.

[0098] If the season variable is equal to 0.5 or 1 and the criticality level is equal to 3, the processor sets the value of the first energy threshold provided by solar radiation SE1 to the value 750 and sets the value of the second energy threshold provided by solar radiation SE2 to the value 750.

[0099] In the next step E507, the processor 200 determines the opening level of the occultation devices.

[0100] To do this, the processor 200 checks whether the sum of the solar radiation power input over a predetermined duration of less than 4 hours is less than the value of the variable SE1. If so, the processor 200 sets the value of a variable denoted decision to the value 0.

[0101] The processor 200 checks whether the sum of the solar radiation power input during the predetermined duration of less than 4 hours is greater than the value of the variable SE2. If so, the processor 200 sets the value of the decision variable to the value 1.

[0102] The processor 200 sets the value of the decision variable to the value 0.5 if the sum of the power input of the solar radiation during the predetermined duration of less than 4 hours is between SE1 and SE2.

[0103] The predetermined duration is for example equal to 3 hours.

[0104] For the decision value at 0, the processor 200 controls the occultation device 101 so that it allows the solar radiation to pass through the entire surface of the opening.

[0105] For the decision value at 0.5, the processor 200 controls the occultation device 101 so that it allows solar radiation to pass through 60% of the surface of the opening.

[0106] For the decision value at 1, the processor 200 controls the occultation device 101 so that it lets the solar radiation pass through 25% of the surface of the opening.

[0107] Of course, the present invention is in no way limited to the embodiments described here, but on the contrary encompasses any variant within the reach of those skilled in the art.

Claims

1. Method for controlling at least one motorized roller shutter (101) of at least one opening of a room (10) of a building, characterized in thatthe method comprises the steps of: - obtaining (E400, E401, E402, E403, E404), from a server of a telecommunications network, weather forecasts comprising temperature forecasts and information representative of forecasts of values of the power of solar radiation for at least one day, - obtaining (E500) the interior temperature of the building, - comparing (E502) the maximum temperature of the forecasts for the day with a value representative of a first predetermined temperature threshold, - comparing (E502) the interior temperature of the building with a value representative of a second predetermined temperature threshold, - calculating (E502) a ratio of the value of the energy provided by the solar radiation for the day to the difference between the value representative of the second predetermined temperature threshold and the value of the interior temperature of the building,- comparison (E502) of the calculated ratio with a decision threshold, - if (E507) the maximum temperature of the forecasts for the day is greater than or equal to the representative value of the first predetermined temperature threshold and if the interior temperature of the building is greater than or equal to the representative value of the second predetermined temperature threshold, control of the occultation device, - if (E507) the maximum temperature of the forecasts for the day is greater than or equal to the representative value of the first predetermined temperature threshold and if the interior temperature of the building is less than the representative value of the second predetermined temperature threshold and if the calculated ratio is greater than or equal to the decision threshold, control of the occultation device., 2. Method according to claim 1, characterized in thatThe values of solar radiation power are obtained from a transposition of cloudiness predictions obtained via the server.

3. Method according to claim 1 or 2, characterized in that the method further comprises the steps of: - not controlling, for the whole day, the blackout device if the maximum temperature of the forecasts for the day is lower than the representative value of the first predetermined temperature threshold, - not controlling, for the whole day, the blackout device if the maximum temperature of the forecasts for the day is greater than or equal to the representative value of the first predetermined temperature threshold and if the interior temperature of the building is lower than the representative value of the second predetermined temperature threshold and if the calculated ratio is lower than the decision threshold.

4. Method according to any one of claims 1 to 3, characterized in thatthe representative value of the first predetermined threshold is equal to a predetermined temperature threshold plus a value defined by the occupant of the building.

5. Method according to claim 4, characterized in that the value defined by the occupant of the building is added to the difference between the representative value of the second predetermined temperature threshold and the value of the interior temperature of the building.

6. Method according to any one of claims 1 to 5, characterized in that the control of the occultation device is carried out by determining a value of a variable called season determined by comparing the temperature forecast to a fourth and a fifth predetermined thresholds, the value of the variable called season being used to determine the value of a variable representative of a minimum temperature and the value of a variable representative of a maximum temperature.

7. Method according to claim 6, characterized in thatthe value of a criticality threshold is determined by comparing the interior temperature of the building with the value of the variable representing a minimum temperature and with the value of the variable representing the maximum temperature.

8. Method according to claim 7, characterized in that the value of the criticality threshold and the value of the variable called season are used to determine the value of a first and a second threshold of energy provided by solar radiation.

9. Method according to claim 8, characterized in that the control of the occulting device is carried out so that the occulting device allows the solar radiation to pass through a part of the surface of the opening, the part of the surface of the opening being determined by comparing the value of the energy provided by the solar radiation during a predetermined duration of less than 4 hours.

10. Method according to claim 9, characterized in thatthe predetermined duration is equal to 3 hours.

11. System for controlling at least one motorized roller shutter (101) of at least one opening of a room (10) of a building, characterized in thatthe system comprises: - means for obtaining, from a server of a telecommunications network, weather forecasts comprising temperature forecasts and information representative of forecast values of the power of solar radiation for at least one day, - means for obtaining the interior temperature of the building, - means for comparing the maximum temperature of the forecasts for the day with a value representative of a first predetermined temperature threshold, - means for comparing the interior temperature of the building with a value representative of a second predetermined temperature threshold, - means for calculating a ratio of the value of the energy provided by solar radiation for the day to the difference between the value representative of the second predetermined temperature threshold and the value of the interior temperature of the building,- means for comparing the calculated ratio with a decision threshold, - means for controlling the occultation device if the maximum temperature of the forecasts for the day is greater than or equal to the representative value of the first predetermined temperature threshold and if the interior temperature of the building is greater than or equal to the representative value of the second predetermined temperature threshold, - means for controlling the occultation device if the maximum temperature of the forecasts for the day is greater than or equal to the representative value of the first predetermined temperature threshold and if the interior temperature of the building is less than the representative value of the second predetermined temperature threshold and if the calculated ratio is greater than or equal to the decision threshold.,

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