Algorithm for detecting overheating based on an interior temperature measurement

Abstract

The invention relates to a method for managing a home automation setup (100) of a building (1) comprising at least one motor-driven sun shade (3), a management unit (102) for managing a position assumed by the sun shade (3) over time, and at least one device (104) for measuring an interior temperature in the building (1), the method being implemented by the management unit (102) and comprising: - a measurement step in which the interior temperature (T) is measured; - a comparison step in which an overheating dynamics parameter (PDSC) is determined according to a comparison of a change (DT) in the interior temperature (T) over a first time period (t1) with an overheating rate (VSC); - a step of controlling the position assumed by the sun shade (3) according to the overheating dynamics parameter (PDSC).

Description

[0001] DESCRIPTION

[0002] TITLE: Algorithm for detecting overheating from an interior temperature measurement

[0003] The invention relates to the field of managing the interior thermal comfort of a building and more particularly to a method for managing a home automation installation and a terminal for a home automation installation.

[0004] A building for domestic or professional use has a set of active elements, such as air conditioning or heating devices, or passive elements, such as solar protection such as roller shutters or blinds, whose behavior, in particular through automatic control, has a strong influence on the evolution of thermal comfort, i.e. the interior temperature of the building, and interior visual comfort.

[0005] Several phenomena can influence the indoor temperature, including: external climatic conditions, including the irradiance of external objects, through their impact on the external envelope of the building, cause the indoor temperature to change with greater or lesser inertia. The latter varies in particular depending on the construction materials, the insulation of the building, the orientation of the openings, and the geometry of the building; air conditioning and heating systems can also change the indoor temperature of the building, in particular by compensating, upwards or downwards, for energy inputs from other energy sources; activities carried out inside the building, such as the operation of an oven or a fireplace, or the presence of a large number of people, etc., significantly change the indoor temperature of the building.

[0006] Among these phenomena, irradiance and more precisely solar radiation transmitted through the glazing of a building opening is one of the predominant components of an increase in interior temperature.

[0007] Thus, controlling solar protection, i.e. controlling the opening or closing of the solar protection, by interacting directly with the exterior has a direct and significant impact on thermal and visual comfort, with very limited energy expenditure to ensure this control. In other words, good management of solar protection allows several degrees of gain in indoor temperature.

[0008] Controlling or managing a solar protection system involves changing the positions of the solar protection system over time between a deployed or unrolled position in which it stops at least part of the solar radiation, and a folded or rolled-up position in which it stops a less significant part of the solar radiation.

[0009] Manual control, or management, is not optimal from an energy point of view because it is difficult for a building occupant to know exactly what the ideal position of the solar protection is at any given moment, and when to open or close it. In addition, if the building is unoccupied, movements are impossible, unlike automatic control, which continuously ensures the positioning of the protections. It is therefore important to be able to manage automatic control optimally, particularly to limit the increase in indoor temperature.

[0010] Solutions are known that implement automated management or control of solar protection to limit the increase in indoor temperature using a set of sensors, for example outdoor brightness sensors, and / or a twilight clock linked to a home automation system. However, these solutions require the use of expensive sensors and / or a connection to a home automation system and are complex to implement.

[0011] The invention aims to remedy all or part of the aforementioned drawbacks by proposing a method for managing a home automation installation of a building comprising at least one motorized solar protection, a unit for managing a position taken by the solar protection over time, and at least one device for measuring an interior temperature of the building, the method being implemented by the management unit located inside the building and comprising:

[0012] A measuring step in which the indoor temperature is measured;

[0013] A comparison step in which a superheating dynamics parameter is determined based on a comparison of a change in the interior temperature over a first time interval with a superheating rate;

[0014] A step of controlling the position taken by the solar protection according to the overheating dynamics parameter.

[0015] An overheating situation corresponds to a situation in the building in which the interior temperature is higher than a maximum value of a comfort temperature range.

[0016] According to one embodiment, the comfort temperature range is within the interval [16°, 30°], for example the interval [19°, 27°], preferably the interval [21°, 26°].

[0017] The management method according to the invention aims to modify the position of the solar protections so as to limit an increase in the interior temperature, so that it remains within the comfort temperature range while preserving visual comfort for users. The method acts on the solar protections when an overheating situation linked to solar radiation is effective or when it is likely to occur. More precisely, the method closes, or puts the solar protections in the deployed position when an overheating dynamic is detected. The overheating dynamic corresponds in particular to an increase in the interior temperature. It is characterized by the overheating dynamic parameter.

[0018] The method only acts when the overheating dynamics are linked to solar radiation in order to preserve the visual comfort of users. It is in fact useless, and has no effect on the interior temperature, to close the solar protections if the overheating dynamics and / or the overheating situation results from other phenomena such as the activation of active elements, or activities carried out inside the building. Closing the solar protections in these cases would significantly reduce the visual comfort of users.

[0019] The process therefore helps prevent overheating in a building, particularly during the summer season.

[0020] In order for the method to be easy to implement, it performs the detection of the overheating dynamics linked to solar radiation on the basis of temperature information, this being solely derived from measurements of the interior temperature T in the building considered. More precisely, the temperature information is solely derived from a succession of interior temperature measurements spaced apart by a sampling time interval, the latter preferably being between Oh and 1 h, for example 15 minutes.

[0021] The particular interest of this process is to rely mainly, or even solely, on the measurement of indoor temperature, in other words to free itself from the need for measurements or recovery of outdoor temperature information, which can be complex to implement and / or unreliable.

[0022] Indoor temperature measurements also make it possible to avoid the need for significant configuration to define the building structure, such as thermal insulation coefficients, geolocation, etc.

[0023] However, the indoor temperature is influenced by different phenomena. Thus, it is not possible to use a single value as a marker of an overheating dynamic linked to solar radiation transmitted through the glazing of a building opening. Indeed, a comparison of the instantaneous indoor temperature with the maximum value of the comfort temperature range, for example, makes it possible to detect an actual overheating situation but does not make it possible to indicate whether this overheating is linked to solar radiation or to another phenomenon such as the operation of an oven in a living room, or to the inertia of the building, for example. On the other hand, this detection of an actual overheating situation is late and can therefore neither anticipate an upcoming overheating situation nor generally be correctly compensated by controlling the solar protections.To discriminate overheating dynamics linked to solar radiation, the method according to the invention comprises a measuring step which measures and records the interior temperature over time. Preferably, these temperatures are recorded in a memory of the management unit. More precisely, the temperature measurement is carried out periodically, following a sampling period.

[0024] The method also comprises a comparison step determining the overheating dynamics parameter which is representative of a detection of an actual or future overheating situation inside the building.

[0025] The superheating dynamics parameter is determined on the basis of temperature information, this being solely derived from the interior temperature T of the building in question. More precisely, the superheating dynamics parameter is determined based on a comparison of an evolution of the interior temperature over a first time interval with an overheating rate.

[0026] The overheating rate is determined, or calibrated, so as to be representative of an overheating dynamic of the building linked to solar radiation. According to one embodiment, the overheating rate is expressed by a temperature over a period of time, for example in °C / h. When the change in the interior temperature is increasing, the interior of the building heats up and can, if the interior temperature becomes higher than the maximum value of the comfort temperature range, enter an overheating situation. In other words, the method, by means of the overheating dynamic parameter, detects a significant increase in the interior temperature which will lead to an uncomfortable temperature if no action is taken, i.e. to an overheating dynamic. The method also makes it possible, when the interior temperature is already an uncomfortable temperature, to detect a worsening of the discomfort situation if no action is taken.When the indoor temperature changes are decreasing, the building interior cools down. In this situation, the indoor temperature may still be above the maximum value of the comfort temperature range, meaning the building may still be in an overheating situation. However, if cooling is in progress, there is no longer any overheating dynamic and closing the solar protections unnecessarily reduces the visual comfort of users, or even slows down said cooling.

[0027] According to one embodiment, the measurement step and / or the comparison step and / or the control step are carried out iteratively following a production period.

[0028] Thus, the state of the superheat dynamics parameter is updated at each iteration, and can therefore vary over time.

[0029] According to one embodiment, the performance period may be equal to or different from the sampling period. According to one embodiment, the performance period is between 0 h and 1 h, preferably for example 15 min. The invention may also have one or more of the following features taken alone or in combination.

[0030] According to one embodiment, the first time interval is between 0 and 3 hours, preferably between 0 and 1 hour, for example 30 minutes.

[0031] According to one embodiment, the superheating rate is positive or zero.

[0032] According to one embodiment, the control step is carried out over a period of days.

[0033] The daytime period corresponds to the time when solar radiation can increase the indoor temperature. The daytime period can be determined in different ways, such as based on information from a light sensor, by information about calendar sunrise and sunset, or by determination based on indoor temperature.

[0034] This reduces the risk of unnecessary closing of sun protections.

[0035] According to one embodiment, the overheating rate depends on the measured interior temperature.

[0036] In order to best determine or calibrate the overheating rate so that it is representative of an increase in interior temperature linked to solar radiation, it is variable and depends in particular on the measured interior temperature.

[0037] For example, the closer the indoor temperature is to the maximum value of the comfort temperature range, the slower the overheating rate will be. In other words, the closer the indoor temperature is to the maximum value of the comfort temperature range, the less an increase in the indoor temperature is allowed, and the more reactively the sun protections are closed.

[0038] According to one embodiment, the overheating rate depends on an average value of the interior temperature measured over a second time interval.

[0039] Using the average value of the indoor temperature makes it possible to limit a certain number of false detections.

[0040] According to one embodiment, the second time interval is between 0 and 3 hours, preferably between 0 and 1 hour, for example 30 minutes.

[0041] According to one embodiment, the first time interval is equal to the second time interval.

[0042] According to one embodiment, the change in the indoor temperature over the first time interval is determined from a sampling of measurements of the indoor temperature over the first time interval. According to one embodiment, the change in the indoor temperature over the first time interval is determined by a slope of a straight line calculated by a least squares method of the indoor temperature over the first time interval.

[0043] According to one embodiment, the solar protection assumes a deployed position when the overheating dynamics parameter is in an active state.

[0044] The overheating dynamics parameter can be in an active state or an inactive state. In the active state, an overheating dynamic is detected. The solar protection therefore assumes a deployed position. This deployed position preferably corresponds to a deployment of 80% of the total travel of the solar protection. Thus, this deployed position preserves a minimum of natural light inside the building, and limits a risk of being locked outside the building. Conversely, when the overheating dynamics parameter is in the inactive state, there is no or no longer any overheating dynamic. The management unit can be configured to control the solar protection so that it assumes a retracted position. Alternatively, the management unit can be configured not to react in such a situation. The solar protection then remains in its position.

[0045] According to one embodiment, the superheat dynamics parameter is in the active state when the change in the interior temperature over the first time interval is greater than the superheating rate.

[0046] According to one embodiment, the superheat dynamics parameter is in an inactive state when the change in the interior temperature over the first time interval is less than the superheating rate

[0047] According to one embodiment, the superheat dynamics parameter is also determined based on a comparison of a representative value of the interior temperature with a superheat temperature range.

[0048] The superheat temperature range includes at least a low superheat temperature threshold and an high superheat temperature threshold.

[0049] The superheat dynamics parameter varies depending on whether the representative value of the indoor temperature is below, within, or above the superheat temperature range.

[0050] According to one embodiment, the overheating temperature range corresponds to the comfort temperature range.

[0051] According to one embodiment, the superheat temperature range is within the interval [16°, 30°], for example the interval [19°, 27°], preferably the interval [21°, 26°].

[0052] According to one embodiment, the overheating temperature range corresponds to the comfort temperature range. According to one embodiment, the representative value of the indoor temperature is determined by an average of the indoor temperature over a third time interval. Using the average value of the indoor temperature makes it possible to limit a certain number of false detections.

[0053] According to one embodiment, the third time interval is between 0 and 3 hours, preferably between 0 and 1 hour, for example 30 minutes.

[0054] According to one embodiment, the first time interval is equal to the third time interval.

[0055] According to one embodiment, the second time interval is equal to the third time interval.

[0056] According to one embodiment, the superheat dynamics parameter is in the active state when the value representative of the interior temperature is included in the superheat temperature range.

[0057] Thus, if the representative value of the interior temperature is included in the overheating temperature range and the change in the interior temperature over the first time interval is greater than the overheating rate, then the overheating dynamics parameter is in the active state.

[0058] According to one embodiment, the overheating dynamics parameter is in the active state when the value representative of the interior temperature is greater than a high overheating temperature threshold of the overheating temperature range and the change in the interior temperature over the first time interval is increasing.

[0059] According to one embodiment, the method further comprises a step of detecting a sustainable overheating dynamics in which a sustainable overheating dynamics parameter is in an active state when the overheating dynamics parameter is in an active state for a sustainable overheating duration over a fourth time interval.

[0060] A sustained overheating dynamic is defined as the detection of the overheating dynamic parameter in an active state for a sustained overheating duration over a fourth time interval. In other words, when the overheating dynamic parameter is active, continuously or fractionally, for the sustained overheating duration taken over the fourth time interval, the method detects sustained overheating.

[0061] The sustained overheating time is less than or equal to the fourth time interval.

[0062] According to one embodiment, the fourth time interval is between 0 and 3 hours, preferably between 0 and 1 hour, for example 30 minutes.

[0063] According to one embodiment, the duration of sustainable overheating is between 0 h and 3 h, preferably between 0 h and 1 h, for example 30 min. According to one embodiment, the control step defines the position to be taken by the solar protection according to the sustainable overheating dynamics parameter.

[0064] Thus, the process limits false detections of overheating dynamics.

[0065] According to one embodiment, the management method also comprises:

[0066] A season detection step in which a season is determined;

[0067] A night detection step in which an external brightness is measured; the step of controlling the position taken by the solar protection being carried out according to the overheating dynamic parameter, the determined season and the external brightness. The season detection step makes it possible to determine the current season, and in particular whether the current season is winter. For example, the season detection is carried out by an analysis of the evolution of the internal temperature.

[0068] Outdoor brightness is measured to determine the time of day, including whether the time of day is night. For example, outdoor brightness can be measured using a sensor positioned outside the building on the sun protection.

[0069] Thus, it is possible to modulate the control of the solar protection according to external phenomena such as the season and the time of day. The method according to the invention does not require a connection to a remote network, such as an Internet network, to operate efficiently.

[0070] According to one embodiment, the sun protection assumes the deployed position when the exterior brightness is below a night threshold and the determined season is winter. When the exterior brightness is below the night threshold, the time of day is night.

[0071] This makes it possible to keep the sun protection in the deployed position even though it's winter and dark. The overheating detection is then probably due to a heating device such as a wood stove or fireplace. Keeping the sun protection in the deployed position helps protect the building from the cold.

[0072] According to one embodiment, the solar protection takes the deployed position also when the exterior brightness is greater than a daytime threshold and the determined season is other than winter.

[0073] Thus, the sun protection is put in the deployed position if an overheating dynamic is detected in order to limit the discomfort due to this increase in temperature.

[0074] According to one embodiment, the solar protection is maintained in its position when the exterior brightness is greater than a daytime threshold and the determined season is winter.

[0075] Thus, during the day in winter, the position of the solar protection is not modified even if an overheating dynamic is detected. This allows to take full advantage of the sometimes significant heat that can be brought by strong solar radiation. According to one embodiment, the night threshold is equal to the day threshold.

[0076] Thus, the process determines whether the time of day is night or day.

[0077] According to one embodiment, the invention also relates to a terminal of a home automation installation implementing the method according to the invention.

[0078] According to one embodiment, the terminal comprises a temperature measuring device, and the comparison step is carried out using temperature information, this information being solely derived from internal temperature measurements by the temperature measuring device of the terminal.

[0079] The invention also relates to a method for managing a home automation installation of a building comprising at least one motorized solar protection, a control terminal, a unit for managing a position taken by the solar protection over time, and at least one device for measuring an interior temperature of the building, the method being implemented by the management unit and comprising, from a reference instant, one or two maximum commands for closing the at least one solar protection over a period of 24 hours when an overheating dynamic is detected, the overheating dynamic and / or the reference instant being determined solely on interior temperature measurements.

[0080] The invention also relates to a control terminal implementing such a method.

[0081] The invention will be better understood from the following description, which relates to one or more embodiments according to the present invention, given as non-limiting examples and explained with reference to the appended schematic drawings, in which:

[0082] [FIG. 1] is a schematic representation of a building comprising a home automation installation implementing a method in accordance with the invention;

[0083] [FIG. 2] is a schematic cross-section of a solar protection of the home automation installation of Figure 1;

[0084] [FIG. 3] is a schematic perspective view of the sun protection illustrated in Figure 2;

[0085] [Fig. 4] is a graph illustrating an evolution of an interior temperature and a quantity of solar radiation transmitted through a window over two days;

[0086] [Fig. 5] is a graph illustrating a state of a superheat dynamics parameter as a function of the interior temperature;

[0087] [Fig. 6] is an illustration of a method according to the invention;

[0088] [Fig. 7] is a perspective view from above of a first embodiment of a local control unit for implementing a method according to the invention;

[0089] [Fig. 8] shows a top view of a second embodiment of a local control unit;

[0090] [FIG. 9] represents a diagram of a method according to the invention comprising a season detection step and a night detection step. The solution proposed here relates to automatic management of a position of a solar protection over time making it possible to act on thermal comfort in an area of ​​a building. As illustrated in FIG. 1, a building 1 comprises a home automation installation 100 comprising a motorized solar protection 3. The home automation installation 100 comprises a management unit 102 of a position taken by the solar protection 3 over time.

[0091] The installation also comprises at least one device 104 for measuring the interior temperature T of the building, in particular of a room of the building 1 associated with the solar protection 3, that is to say in a room of the building 1 comprising at least one opening 108 which may be masked or not or partially by the solar protection 3. The measuring device 104 also comprises a memory in which interior temperature T data can be stored at substantially regular intervals over a predefined period, for example over 24 hours.

[0092] Other parameters associated with the interior comfort of building 1 can also be measured, in particular a degree of brightness, a degree of hygrometry or a composite quantity defined as a function of the quantities previously cited, or a prediction of these parameters.

[0093] According to the embodiment presented, the installation 100 comprises an active device 106 for providing thermal inputs inside the building 1, such as for example heating, air conditioning or a reversible heat pump. In one operating mode of the installation 100, the active device operates independently of the management unit 102. In an alternative operating mode, the management unit and the active device share a certain number of components, for example the device for measuring the interior temperature may be common to the active device and the management unit.

[0094] The solar protection 3 is installed outside or inside the building, in particular near an opening 108 of the building. An opening 108 is for example a window, a French window or a glass door. The solar protection is advantageously an interior or exterior blind made of fabric or provided with adjustable slats. The present invention, however, applies to all types of solar protection.

[0095] As shown in Figures 2 and 3, the sun protection 3 comprises a canvas 2 fixed by one of its ends to a winding tube 4, arranged inside a box 9 and driven by an electromechanical actuator 5, and by the other end to a weighted bar 8. The sun protection 3, and more particularly the canvas 2 is movable between a rolled up or folded position, in particular high, in which the canvas 2 uncovers the opening 108 at the level of which the sun protection is positioned, and an unrolled or deployed position, in particular low, in which the canvas 2 covers the opening and thus at least partially blocks the solar radiation through the opening 108. The deployment of the canvas 2 can be guided by slides 6.

[0096] In a known manner, the electromechanical actuator 5 is fixed to a supporting structure 9 linked to the building 1 and inserted into the winding tube 4 to drive the latter in rotation so as to unwind or wind the canvas 2.

[0097] In the case of a slatted blind type sun protection, the individual slats of the blind are preferably suspended via cords intended to be wound onto the roller tube or unwound from the roller tube so as to fold or unfold the screen.

[0098] The electromechanical actuator 5 is controlled by a local control unit 12 which may be provided with an antenna 12a. The local control unit 12 takes the form of a wall switch, or a remote control. Such a local control unit 12 is shown more precisely according to a first embodiment in FIG. 7 and according to a second embodiment in FIG. 8.

[0099] The installation 100 may also comprise a central control unit 13 which may be provided with an antenna 13a, which acts as a gateway between the installation 100 and an Internet network external to the installation. The management unit 102 may be a local control unit 12 or a central control unit 13.

[0100] The electromechanical actuator 5 is configured to execute movement commands, in particular deployment or retraction, of the solar protections 3, the commands being able to be issued, in particular, by the local control unit 12 or the central control unit 13, which are part of the installation 100.

[0101] The electromechanical actuator 5 comprises an electric motor 10 and an electronic control unit 15 capable of operating the electric motor 10 of the electromechanical actuator 5, and, in particular, enabling the electric motor 10 to be supplied with electrical energy.

[0102] The electronic control unit 15 comprises a communication module, in particular for receiving control orders, the control orders being issued by the local control unit 12 or the central control unit 13, for example by means of radio control orders.

[0103] A remote control 14, which may be a type of local control unit, and provided with a control keyboard, which comprises selection and possibly display means, furthermore allows a user to intervene on the electromechanical actuator 5 and / or the local control unit 12 and / or central control unit 13.

[0104] The installation may also include a weather station, not shown, located outside the building, including, in particular, one or more sensors that can be configured to determine, for example, an outside temperature, brightness or even wind speed.

[0105] The electromechanical actuator 5 may comprise a connection to a mains power source or may comprise a stand-alone electrical power supply device, such as for example a photovoltaic panel and / or an electrical energy storage device.

[0106] The installation 100, in particular the management unit 102, and the electromechanical actuator 5 comprise all the hardware and / or software means for implementing the management method which is the subject of the invention.

[0107] The management unit 102 comprises a processing unit arranged to contain and execute a computer program product comprising portions of program code for executing the steps of a method for managing the home automation installation 100 according to the invention. In particular, the management unit 102 is capable of determining automatic management of a positioning of the solar protection 3 as a function of a previously selected control mode. The automatic management of the solar protection 3 notably comprises deployment control orders, i.e. opening, or retraction, i.e. closing of the solar protection transmitted from the management unit 102 to the electromechanical actuator 5 in accordance with the selected control mode.

[0108] The management unit 102 comprises a memory in which the control mode to be carried out and a set of programs associated with different control modes can be stored.

[0109] The management unit 102 is also arranged to receive data from the indoor temperature measuring device 104. The management unit 102 can also receive status or position data provided by the electromechanical actuator 5, relating to the solar protection 3. In this regard, the management unit 102 comprises a communication module.

[0110] The management unit 102 also comprises a user interface. The user interface is arranged to allow possible programming of the management unit 102.

[0111] The management unit 102 further comprises a display element for providing a value of the interior temperature T and / or a reference of the control mode following the implementation of the management method described later.

[0112] The management unit 102 also optionally comprises illuminance measuring elements, for example a luxmeter or means of communication with such illuminance measuring elements.

[0113] The communication module of the management unit 102 is also adapted to receive information relating to weather forecasts, for example via a connection to an Internet network via the central control unit. Optionally, the management unit 102 can be even more efficient with the use of weather predictions of the outside temperature and solar radiation over 24 hours. The solar radiation can be deduced from an illuminance measurement via a lux meter.

[0114] The management method according to the invention is described below in relation to figures 4, 5 and 6.

[0115] The method aims to detect overheating dynamics by means of temperature information, this being solely derived from measurements of the interior temperature T of the building, i.e. excluding information on the temperature outside the building in question.

[0116] We distinguish an overheating situation Sc which corresponds to a situation in building 1 in which the interior temperature T is higher than a maximum value T c + of a comfort temperature range.

[0117] According to one embodiment, the comfort temperature range is within the interval [16°, 30°], for example the interval [19°, 27°], preferably the interval [21°, 26°].

[0118] More specifically, the management method according to the invention aims to modify the position of the solar protections 3 so as to limit an increase in the interior temperature T, so that it remains within the comfort temperature range while preserving visual comfort for the users. The method acts on the solar protections 3 when an overheating situation Sc linked to solar radiation a is effective or when it is likely to occur. More specifically, the method puts the solar protections 3 in the deployed position at least partially when an overheating dynamic Dsc is detected. The overheating dynamic Dsc corresponds in particular to an observed increase in the interior temperature T, that is to say a rate of increase in the temperature (typically in °C / h). It is characterized by an overheating dynamic parameter PDsc.

[0119] The method only acts when the overheating dynamics Dsc are linked to the solar radiation a in order to preserve the visual comfort of the users, the method therefore acts over a period of day. It is in fact useless, and has no effect on the interior temperature T, to close the solar protections 3 if the overheating dynamics Dsc and / or the overheating situation Sc results from other phenomena such as the activation of active elements, or activities carried out inside the building 1. Closing or deploying the solar protections 3 in these cases would significantly reduce the visual comfort of the users.

[0120] The indoor temperature T is influenced by various phenomena, including: outdoor climatic conditions, including the irradiance of outdoor objects; air conditioning and heating devices; activities carried out inside the building. Figure 4 illustrates the time lag related to an inertia of building 1 between an increase A in solar radiation a, and an increase B in the indoor temperature T.

[0121] Thus, it is not possible to directly use the instantaneous interior temperature T as a marker of an overheating dynamic Dsc linked to the solar radiation a transmitted through the glazing of the opening 108 of building 1. Indeed, a comparison of the interior temperature T with the maximum value T c +of the comfort temperature range for example, can make it possible to detect an effective overheating situation Sc but does not make it possible to indicate whether this overheating is linked to solar radiation a or to another phenomenon such as the operation of an oven in a living room, or to the inertia of the building 1 for example. On the other hand, it does not make it possible to anticipate certain preventive actions making it possible to limit the increase in the interior temperature.

[0122] This is more particularly illustrated in Figure 5 where the overheating situations Sc are indicated in dotted lines, while the overheating dynamics Dsc are indicated in solid lines. When the evolution of the interior temperature T is increasing, the interior of building 1 heats up and can, if the interior temperature T becomes higher than the maximum value T c +of the comfort temperature range, move into an overheating situation Sc. In other words, the process, by means of the overheating dynamics parameter PDsc, detects a significant increase in the indoor temperature T which will lead to an uncomfortable temperature if no action is taken, i.e. to an overheating dynamic Dsc.

[0123] As illustrated in Figure 5, building 1 can be in both an overheating situation Sc, and an overheating dynamic Dsc, or only in an overheating situation Sc or in an overheating dynamic Dsc.

[0124] When the indoor temperature T changes in a decreasing direction, the interior of building 1 cools down. In this situation, the indoor temperature T can always be higher than the maximum value T c +of the comfort temperature range, i.e. building 1 may still be in an overheating situation Sc. However, if cooling is in progress, there is no longer any overheating dynamic Dsc and the closing of the solar protections 3 unnecessarily reduces the visual comfort of the users, or even slows down said cooling.

[0125] To discriminate an overheating dynamic Dsc linked to solar radiation a, the method according to the invention comprises a measuring step which measures and records the interior temperature T over time. Preferably, these temperatures T are recorded in a memory of the management unit.

[0126] The method also comprises a comparison step determining the overheating dynamics parameter PDsc which is representative of a detection of an actual or future overheating situation Sc inside the building. According to one embodiment, the solar protection 3 takes a deployed position when the overheating dynamics parameter PDsc is in an active state.

[0127] Conversely, when the PDsc overheating dynamics parameter is in the inactive state, there is no longer any Dsc overheating dynamics, the solar protection 3 can take a folded position or remain in its position.

[0128] The superheat dynamics parameter PDsc is determined on the basis of temperature information, this being only the interior temperature T of the building considered. More precisely, the temperature information is only derived from a succession of interior temperature measurements spaced by a sampling time interval, the latter preferably being between Oh and 1 h, for example 15 minutes.

[0129] The superheating dynamics parameter PDsc is determined at least as a function of a comparison of an evolution of the interior temperature T over a first time interval t1 with a superheating rate Vsc.

[0130] According to one embodiment, the first time interval t1 is between Oh and 3 hours, preferably between Oh and 1 hour, for example 30 minutes.

[0131] According to one embodiment, the evolution of the interior temperature T over the first time interval t1 is determined by a slope of a straight line calculated by a least squares method of the interior temperature T over the first time interval t1.

[0132] The superheating rate Vsc is determined, or calibrated, so as to be representative of an overheating dynamic Dsc of the building 1 linked to solar radiation a. According to one embodiment, the superheating rate Vsc is expressed by a temperature over a duration, for example in °C / h. According to one embodiment, the superheating rate is positive or zero.

[0133] According to one embodiment, the superheating rate Vsc is constant over the first time interval.

[0134] According to one embodiment, the superheating rate Vsc depends on the measured interior temperature T.

[0135] According to one embodiment, the superheating rate Vsc depends on an average value T mO y of the indoor temperature T measured over a second time interval.

[0136] A use of the average value T mO y of the interior temperature makes it possible to limit a certain number of false detections.

[0137] According to one embodiment, the second time interval is between 0 and 3 hours, preferably between 0 and 1 hour, for example 30 minutes.

[0138] According to one embodiment, the first time interval t1 is equal to the second time interval.

[0139] For example, the superheating rate Vsc is calculated by the formula below:

[0140] [Math 1] T+ — T

[0141] > l C l average

[0142] V çc — ~ tl

[0143] With :

[0144] Vsc: the superheating rate in °C / h

[0145] Tc + : the maximum value of the comfort temperature range t1 : the first time interval

[0146] Tmo y : the average value of the indoor temperature T measured over a second time interval.

[0147] When the superheating rate Vsc depends on the interior temperature T, it is more representative of an increase in the interior temperature T linked to solar radiation a.

[0148] For example, the closer the indoor temperature T is to the maximum value Tc + of the comfort temperature range, the lower the overheating rate Vsc will be. In other words, the closer the indoor temperature T will be to the maximum value T c + of the comfort temperature range, the less increase in the indoor temperature T is allowed, and the more the sun protections 3 are closed.

[0149] According to one embodiment, the superheat dynamics parameter PDsc is also determined based on a comparison of a value representative of the interior temperature T with a superheat temperature range [Tse-, T sc + ].

[0150] According to one embodiment, the representative value of the interior temperature T is determined by an average T mO y3 of the indoor temperature over a third time interval.

[0151] A use of the average value T mO y3 of the indoor temperature makes it possible to limit a certain number of false detections.

[0152] According to one embodiment, the third time interval is between 0 and 3 hours, preferably between 0 and 1 hour, for example 30 minutes.

[0153] According to one embodiment, the first time interval t1 is equal to the third time interval.

[0154] According to one embodiment, the second time interval is equal to the third time interval.

[0155] The superheat temperature range [Tse-, T sc + ] includes at least a low overheating temperature threshold Tse- and a high overheating temperature threshold T sc + .

[0156] According to one embodiment, the superheat temperature range [Tse-, T sc + ] is within the range [16°, 30°], for example the range [19°, 27°], preferably the range [21°, 26°]. According to one embodiment, the superheating temperature range [Tse-, T sc + ] corresponds to the comfort temperature range.

[0157] The superheat dynamics parameter PDsc varies depending on whether the representative value of the interior temperature T is below, within or above the superheat temperature range [Tse-, T sc +]. In particular, the superheat dynamics parameter PDsc also varies depending on the value of the indoor temperature T in the superheat temperature range [Tse-, T sc + ] .

[0158] According to one embodiment, the superheating dynamics parameter PDsc is in the active state when the change in the interior temperature T over the first time interval t1 is greater than the superheating speed Vsc.

[0159] According to one embodiment, the superheat dynamics parameter PDsc is in the active state when the value representative of the interior temperature T is included in the superheat temperature range [Tse-, T sc + ].

[0160] According to one embodiment, the superheat dynamics parameter PDsc is in the active state when the value representative of the interior temperature T is greater than a high superheat temperature threshold Tsc + of the superheat temperature range [Tse-, T sc + ] and that the evolution of the interior temperature T over the first time interval t1 is greater than zero.

[0161] For example, the superheat dynamics parameter PDsc is in the active state when: [Math 2]

[0162] Tse — T moy3 > T sc and D T > V sc

[0163] And

[0164] [Math 3]

[0165] Tmoy3 > Tg C and D T > 0

[0166] With :

[0167] Vsc: the superheating rate in °C / h

[0168] Tsc + : the upper threshold of the overheating temperature range

[0169] Tsc: the lower threshold of the overheating temperature range

[0170] Tmoys: the average value of the indoor temperature T measured over the third time interval

[0171] DT: the change in indoor temperature over the first time interval t1

[0172] Thus if the representative value of the interior temperature T is included in the overheating temperature range [Tsc-, T sc + ] and that the evolution DT of the interior temperature T over the first time interval t1 is greater than the overheating rate Vsc, or if the representative value of the interior temperature T is greater than the high overheating temperature threshold Tsc + and the evolution DT of the interior temperature T over the first time interval t1 is greater than zero, then the overheating dynamics parameter is in the active state. This is represented in Figure 6.

[0173] Alternatively, the superheat dynamics parameter PDsc is in the active state when: [Math 4]

[0174] T moy3 > 21 and D T > 0.83

[0175] [Math 5]

[0176] T moy3 > 22 and D T > 0.67

[0177] [Math 6]

[0178] T moy3 > 23 and D T > 0.5

[0179] [Math 7]

[0180] T moy3 > 24 and D T > 0.34

[0181] [Math 8]

[0182] T moy3 > 25 and D T > 0.17

[0183] [Math 9]

[0184] T moy3 > 26 and D T > 0

[0185] With :

[0186] Tmoys: the average value of the indoor temperature T measured over the third time interval

[0187] DT: the change in indoor temperature over the first time interval t1

[0188] Thus, if the representative value of the interior temperature T is greater than an overheating temperature threshold and the evolution DT of the interior temperature T over the first time interval t1 is greater than a predetermined value, then the overheating dynamics parameter is in the active state.

[0189] The method also comprises a step of detecting a sustainable overheating dynamics in which a sustainable overheating dynamics parameter PDDsc is in an active state when the overheating dynamics parameter PDsc is itself in an active state for a sustainable overheating duration over a fourth time interval.

[0190] A sustained overheating dynamic is defined as the detection of the superheating dynamic parameter PDsc maintained, continuously or fractionally, in an active state for a sustained overheating duration over a fourth time interval.

[0191] The sustained overheating time is less than or equal to the fourth time interval.

[0192] According to one embodiment, the fourth time interval is between 0 and 3 hours, preferably between 0 and 1 hour, for example 30 minutes.

[0193] According to one embodiment, the duration of sustained overheating is between 0 and 3 hours, preferably between 0 and 1 hour, for example 30 minutes.

[0194] In the case of a manual command from a user to move the solar protection to a position different from that defined when an overheating dynamic is detected, in particular in the case of such a counter-command within a predefined time window following the control step implemented in accordance with the management method, a new implementation of the method may be provided. Thus, a new control order may be issued if the overheating dynamic continues to be detected.

[0195] The implementation of the method can thus be repeated, preferably once and only once, to maintain the thermal control situation without, however, persistently opposing the wishes of the user.

[0196] According to one embodiment, the control step defines the position to be taken or in other words controls the position taken by the solar protection according to the sustainable overheating dynamics parameter PDDsc.

[0197] Thus, the method helps prevent overheating situations in a building, particularly during the summer season, and limits false detections of overheating dynamics. According to one embodiment, the management method P1 also comprises:

[0198] An EDS season detection step in which a season is determined;

[0199] A night detection step EDN in which an external brightness L is measured; the control step Epos of the position taken by the solar protection 3 being carried out as a function of the overheating dynamics parameter PDsc, the determined season s and the external brightness L.

[0200] The EDS season detection step makes it possible to determine the current season s, and in particular whether the current season is winter H. For example, the detection of season s is carried out by an analysis of the evolution of the indoor temperature T.

[0201] The outdoor brightness L is measured so as to determine a time of day MJ, and in particular whether the time of day MJ is night N. For example, the outdoor brightness L can be measured by means of a sensor positioned outside building 1 on the sun protection 3.

[0202] Thus, it is possible to modulate the control of the solar protection 3 according to external phenomena such as the season s and the time of day MJ. The method according to the invention does not require a connection to a remote network, such as for example an Internet network, to operate efficiently.

[0203] According to one embodiment, the solar protection 3 takes the deployed position when the exterior brightness L is greater than a day threshold and the determined season s is different from winter H, if an overheating dynamic detection takes place.

[0204] Thus, the solar protection 3 is put in the deployed position if an overheating dynamic is detected in order to limit the discomfort due to this increase in temperature T. According to one embodiment, the solar protection 3 takes the deployed position when the exterior brightness L is lower than a night threshold and the determined season s is winter H. When the exterior brightness L is lower than the night threshold, the time of day MJ is night N.

[0205] Thus, it is possible, despite detection of overheating dynamics, to keep solar protection 3 in the deployed position if it is winter H and night N. The detection of overheating dynamics is then probably due to a heating device such as a wood stove or a fireplace. Keeping solar protection 3 in the deployed position protects building 1 from the cold.

[0206] According to one embodiment, the solar protection 3 is maintained in its position when the exterior brightness L is greater than a day threshold and the determined season s is winter H, if an overheating dynamic takes place.

[0207] Thus, during the day in winter, the position of the solar protection 3 is not modified even if an overheating dynamic is detected. This allows you to take full advantage of the sometimes significant heat that can be brought by strong solar radiation.

[0208] According to one embodiment, the night threshold is equal to the day threshold.

[0209] Thus, the method determines whether the time of day MJ is night N or day.

[0210] The particular interest of this process is to rely mainly, or even solely, on the measurement of indoor temperature, in other words to free itself from the need for measurements or recovery of outdoor temperature information, which can be complex to implement and / or unreliable.

[0211] Indoor temperature measurements also make it possible to avoid the need for significant configuration to define the building structure, such as thermal insulation coefficients, geolocation, etc.

[0212] Thus, the method is reliable while being implemented from a local control unit 12, not connected to an external network and integrating a temperature measuring device 104 as well as the hardware and software means for implementing the method, such as a microprocessor and a memory in which the software means are stored.

[0213] Such a local control unit 12 is shown according to a first embodiment in FIG. 7 and according to a second embodiment in FIG. 8.

[0214] The local control unit 12 may comprise: a base; a control button 125 comprising at least two support zones 126, 127, in particular substantially orthogonal to a main plane P of the local control unit 12; a management unit 102; a temperature measuring device 104.

[0215] A pressing force on the control button 125 causes a movement of the relevant pressing zone 126, 127 from a stable inactive position occupied by the control button 125 at rest (i.e. when it is not actuated), to an unstable active position, in which an electrical contactor is activated.

[0216] The local control unit 12 may also comprise, as illustrated in FIG. 8: a slider button 101 comprising a base 122 and a manual actuation element 103 projecting from the base 122, the slider button 101 having in particular a degree of freedom in a direction where it can be maneuvered to move along a movement axis A1. a light 105 formed in a wall 134 of the control button 125, said light 105 being crossed by the manual actuation element 103 in order to allow the maneuvering of the manual actuation element 103 on the surface of the control button 125;

[0217] The slider button 101 is mounted to move relative to the light 105, in particular in translation in the main plane of the control button, so as to vary between a first stable position and a second stable position located at the two ends of the light 105. In at least one of these two stable positions of the slider button 101, an electrical contactor is activated, which makes it possible to distinguish the position in which the slider button is located relative to the light.

[0218] Thus a user can use the slider button 101 to select whether or not the management unit 102 of the local control unit 12 implements the management method defined above.

[0219] Thus, the management process can be implemented freely during the hot periods of the year and manually deactivated during the colder periods, to avoid misunderstandings linked to particularly hot days in the cool season, when the user would rather prioritize solar inputs.

[0220] In particular, the management method may involve a clock, embedded in the management unit, to determine a reference time from which one or two maximum closing commands for the at least one solar protection over a 24-hour period may be implemented when an overheating dynamic is detected.

[0221] Of course, the invention is not limited to the embodiments described and shown in the attached figures. Modifications remain possible, particularly from the point of view of the constitution of the various elements or by substitution of technical equivalents, without departing from the scope of protection of the invention.

Claims

CLAIMS 1. Method for managing a home automation installation (100) of a building (1) comprising at least one motorized solar protection (3), a management unit (102) for a position taken by the solar protection (3) over time, and at least one device (104) for measuring an interior temperature of the building (1), the method being implemented by the management unit (102) located inside the building and comprising: A measurement step in which the interior temperature (T) is measured; A comparison step in which a superheat dynamic parameter (PDsc) is determined based on a comparison of a change (DT) in the interior temperature (T) over a first time interval (t1) with a superheat rate (Vsc); A step of controlling the position taken by the solar protection (3) according to the overheating dynamic parameter (PDsc).

2. Management method according to claim 1, in which the overheating rate (Vsc) depends on the measured interior temperature (T).

3. Management method according to claim 2, in which the overheating rate (Vsc) depends on an average value of the interior temperature (T) measured over a second time interval.

4. Management method according to any one of the preceding claims, in which the evolution (DT) of the interior temperature (T) over the first time interval (t1) is determined from a sampling of measurements of the interior temperature (T) over the first time interval (t1).

5. Management method according to any one of the preceding claims, in which the solar protection (3) takes a deployed position when the overheating dynamics parameter (PDsc) is in an active state.

6. Management method according to claim 5, in which the overheating dynamic parameter (PDsc) is in the active state when the evolution (DT) of the interior temperature (T) over the first time interval (t1) is greater than the overheating rate (Vsc).

7. Management method according to any one of the preceding claims, in which the overheating dynamic parameter (PDsc) is also determined as a function of a comparison of a value representative of the interior temperature (T) with an overheating temperature range ([Tse-, T sc + ]).

8. Management method according to claim 7, in which the representative value of the interior temperature (T) is determined by an average (Tmoys) of the interior temperature over a third time interval.

9. Management method according to any one of claims 5 or 6, taken in combination with claim 7 or 8, in which the overheating dynamics parameter (PDsc) is in the active state when the value representative of the interior temperature (T) is included in the overheating temperature range ([Tse-, T sc + ]).

10. Management method according to claim 9, in which the overheating dynamic parameter (PDsc) is in the active state when the value representative of the interior temperature (T) is greater than a high threshold (Tsc + ) of superheat temperature of the superheat temperature range ([Tse-, T sc + ]) and that the evolution of the interior temperature (T) over the first time interval (t1) is increasing.

11. Management method according to any one of the preceding claims, further comprising a step of detecting a sustainable overheating dynamic in which a sustainable overheating dynamic parameter (PDDsc) is in an active state when the overheating dynamic parameter (PDsc) is in an active state for a sustainable overheating duration over a fourth time interval.

12. Management method (P1) according to any one of the preceding claims, also comprising: A season detection step (EDS) in which a season(s) is determined; A night detection step (EDN) in which an external brightness (L) is measured; the control step (Epos) of the position taken by the solar protection (3) being carried out as a function of the overheating dynamic parameter (PDsc), the determined season(s) and the external brightness (L).

13. Management method (P1) according to claim 12 taken in combination with claim 5, in which the solar protection (3) takes the deployed position when the exterior brightness (L) is lower than a night threshold and the determined season(s) is winter (H).

14. Management method (P1) according to any one of claims 12 or 13 taken in combination with claim 5, in which the solar protection (3) takes the deployed position also when the exterior brightness (L) is greater than a day threshold and the determined season(s) is different from winter (H).

15. Management method (P1) according to claim 12, in which the solar protection (3) is maintained in its position when the exterior brightness (L) is greater than a daytime threshold and the determined season(s) is winter (H).

16. Terminal of a home automation installation (100) implementing a method according to any one of the preceding claims.

17. Terminal of a home automation installation (100) according to the preceding claim, comprising a device (104) for measuring a temperature, and the comparison step is carried out on the basis of temperature information, this being solely derived from measurements of the interior temperature (T) by the device (104) for measuring a temperature of the terminal.

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