FR3149396A1 - Algorithm for detecting overheating from an interior temperature measurement - Google Patents

Abstract

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 measuring device (104) for an interior temperature of 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 dynamic parameter (PDSC) is determined as a function of a comparison of a change (DT) in the interior temperature (T) over a first time interval (t1) with an overheating speed (VSC); A step of controlling the position taken by the solar protection (3) as a function of the overheating dynamic parameter (PDSC). Figure 5

Description

Algorithm for detecting overheating from an interior temperature measurement

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

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 a change in thermal comfort, i.e. the interior temperature of the building, and interior visual comfort.

• des conditions climatiques extérieures, dont l’irradiance des objets extérieurs, par leurs impacts sur une enveloppe externe du bâtiment, font évoluer la température intérieure avec une plus ou moins grande inertie. Cette dernière varie notamment en fonction des matériaux de construction, d’une isolation du bâtiment, d’une orientation des ouvertures, et d’une géométrie du bâtiment ;
• les dispositifs de climatisation et de chauffage peuvent également faire évoluer la température intérieure du bâtiment, notamment en compensant, à hausse ou à la baisse, des apports énergétiques issus d’autres sources d’énergie ;
• des activités effectuées à l’intérieur du bâtiment, comme une mise en fonctionnement d’un four, ou d’une cheminée, ou une présence d’un grand nombre de personnes, etc… font fortement évoluer la température intérieure du bâtiment.

Several phenomena can influence the interior temperature, including:

• external climatic conditions, including the irradiance of external objects, through their impacts on an external envelope of the building, cause the internal 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 interior 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 operating an oven or a fireplace, or the presence of a large number of people, etc., significantly change the interior temperature of the building.

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

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 makes it possible to gain several degrees on the interior temperature.

Controlling or managing solar protection means changing the positions of the solar protection over time between a deployed or unrolled position in which it blocks at least part of the solar radiation, and a folded or rolled up position in which it blocks a less significant part of the solar radiation.

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 time, 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, in particular to limit the increase in the interior temperature.

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 light 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.

• Une étape de mesure dans laquelle la température intérieure est mesurée ;
• Une étape de comparaison dans laquelle un paramètre de dynamique de surchauffe est déterminé en fonction d’une comparaison d’une évolution de la température intérieure sur un premier intervalle de temps avec une vitesse de de surchauffe ;
• Une étape de commande de la position prise par la protection solaire en fonction du paramètre de dynamique de surchauffe.

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:

• A measuring step in which the indoor temperature is measured;
• A comparison step in which a superheating dynamics parameter is determined based on a comparison of an evolution of the interior temperature over a first time interval with a superheating rate;
• A step of controlling the position taken by the solar protection according to the overheating dynamics parameter.

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.

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°].

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 places 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.

The method only acts when the overheating dynamics are linked to solar radiation in order to preserve the visual comfort of users. It is indeed useless, and has no effect on the indoor temperature, to close the solar protections if the overheating dynamics and/or the overheating situation results from other phenomena such as the start-up 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.

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

In order for the method to be easy to implement, it performs the detection of the dynamics of overheating 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 measurements of the interior temperature spaced by a sampling time interval, the latter preferably being between 0h and 1h, for example 15 minutes.

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.

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

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 an opening in the building. 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 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.

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

The overheating dynamics parameter is determined on the basis of the temperature information, this being solely derived from the indoor temperature T of the building considered. More precisely, the overheating dynamics parameter is determined based on a comparison of a change in the indoor temperature over a first time interval with an overheating rate.

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 duration, for example in °C/h.

When the indoor temperature increases, the interior of the building heats up and can, if the indoor 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 dynamics parameter, detects a significant increase in the indoor temperature that will lead to an uncomfortable temperature if no action is taken, i.e. an overheating dynamic. The method also makes it possible, when the indoor temperature is already an uncomfortable temperature, to detect a worsening of the discomfort situation if no action is taken. When the indoor temperature decreases, the interior of the building cools down. In this situation, the indoor temperature can still be higher than the maximum value of the comfort temperature range, i.e. the building can 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.

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.

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

According to one embodiment, the performance period may be equal to or different from the sampling period.

According to one embodiment, the production period is between 0h and 1h, preferably for example 15min. The invention may also have one or more of the following characteristics taken alone or in combination.

According to one embodiment, the first time interval is between 0h and 3h, preferably between 0h and 1h, for example 30min.

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

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

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 on the basis of information from a light sensor, by information about a calendar sunrise and sunset, or by a determination on the basis of an indoor temperature.

This reduces the risk of unnecessary closing of sun protections.

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

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

For example, the closer the indoor temperature is to the maximum value of the comfort temperature range, the lower 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.

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

Using the average value of the indoor temperature helps to limit a certain number of false detections.

According to one embodiment, the second time interval is between 0h and 3h, preferably between 0h and 1h, for example 30min.

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

According to one embodiment, the evolution of the interior temperature over the first time interval is determined from a sampling of measurements of the interior temperature over the first time interval.

According to one embodiment, the change in the interior temperature over the first time interval is determined by a slope of a straight line calculated by a least squares method of the interior temperature over the first time interval.

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

The overheating dynamics parameter can be in an active state or in an inactive state. In the active state, an overheating dynamic is detected. The solar protection therefore takes 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 in 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 takes a folded position. Alternatively, the management unit can be configured not to react in such a situation. The solar protection then remains in its position.

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

According to one embodiment, the overheating dynamics parameter is in an inactive state when the change in the interior temperature over the first time interval is less than the overheating rate.

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

The overheating temperature range includes at least a low overheating temperature threshold and an high overheating temperature threshold.

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

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

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°].

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

According to one embodiment, the representative value of the interior temperature is determined by an average of the interior temperature over a third time interval.

Using the average value of the indoor temperature helps to limit a certain number of false detections.

According to one embodiment, the third time interval is between 0h and 3h, preferably between 0h and 1h, for example 30min.

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

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

According to one embodiment, the overheating dynamics parameter is in the active state when the value representative of the interior temperature is within the overheating temperature range.

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 speed, then the overheating dynamics parameter is in the active state.

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.

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

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

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

According to one embodiment, the fourth time interval is between 0h and 3h, preferably between 0h and 1h, for example 30min.

According to one embodiment, the duration of sustainable overheating is between 0h and 3h, preferably between 0h and 1h, for example 30min.

According to one embodiment, the control step defines the position to be taken by the solar protection according to the sustainable overheating dynamics parameter.

Thus, the method limits false detections of overheating dynamics.

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

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

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 time, 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 time being determined solely on interior temperature measurements.

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

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 attached schematic drawings, in which:

is a schematic representation of a building comprising a home automation installation implementing a method in accordance with the invention;

is a schematic cross-section of a solar protection of the home automation installation of the ;

is a schematic perspective view of the sun protection illustrated in ;

is a graph illustrating an evolution of an interior temperature and a quantity of solar radiation transmitted through a window over two days;

is a graph illustrating a state of a superheat dynamics parameter as a function of the interior temperature;

is an illustration of a method according to the invention;

is a perspective view from above of a first embodiment of a local control unit for implementing a method according to the invention;

represents a top view of a second embodiment of a local control unit.

The solution proposed here relates to automatic management of the position of solar protection over time, making it possible to act on the thermal comfort of an area of a building.

As illustrated in the , a building 1 comprises a home automation installation 100 comprising 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.

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.

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.

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 can be common to the active device and the management unit.

The sun 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 sun protection is advantageously an interior or exterior blind made of canvas or provided with adjustable slats. The present invention, however, applies to all types of sun protection.

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 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.

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 unroll or roll up the canvas 2.

In the case of a slatted blind type sun protection, the different slats of the blind are preferably suspended via cords intended to be wound on the winding tube or unwound from the winding tube so as to fold up or unfold the screen.

The electromechanical actuator 5 is controlled by a local control unit 12 which can 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 and according to a second embodiment in .

The installation 100 may also comprise a central control unit 13 which may be equipped 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.

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.

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.

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

A remote control 14, which may be a type of local control unit, and provided with a control keyboard, which includes 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.

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.

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

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.

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 according to 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.

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.

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, concerning the solar protection 3. In this regard, the management unit 102 comprises a communication module.

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

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.

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

The communication module of the management unit 102 is also adapted to receive information relating to weather forecasts, for example by means of 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.

The management method according to the invention is described below in relation to Figures 4, 5 and 6.

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.

We distinguish an overheating situation S _c which corresponds to a situation in building 1 in which the interior temperature T is higher than a maximum value T _c ⁺ a comfort temperature range.

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°].

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 users. The method acts on the solar protections 3 when an overheating situation S _c linked to solar radiation α is effective or when it is likely to occur. More specifically, the method places the solar protections 3 in the deployed position at least partially when an overheating dynamic D _SC is detected. The overheating dynamic D _SC corresponds in particular to an observed increase in the interior temperature T, i.e. a rate of increase in temperature (typically in °C/h). It is characterized by an overheating dynamic parameter PD _SC .

The method only acts when the overheating dynamics D _SC is linked to the solar radiation α in order to preserve the visual comfort of the users, the method therefore acts over a period of day. It is indeed useless, and has no effect on the interior temperature T, to close the solar protections 3 if the overheating dynamics D _SC and/or the overheating situation S _c results from other phenomena such as the start-up 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.

• des conditions climatiques extérieures, dont l’irradiance des objets extérieurs ;
• les dispositifs de climatisation et de chauffage;
• des activités effectuées à l’intérieur du bâtiment.

The indoor temperature T is influenced by various phenomena, including:

• external climatic conditions, including irradiance from external objects;
• air conditioning and heating devices;
• activities carried out inside the building.

There illustrates the time lag linked to an inertia of building 1 between an increase A in solar radiation α, and an increase B in the interior temperature T.

Thus, it is not possible to directly use the instantaneous indoor temperature T as a marker of an overheating dynamic D _SC linked to the solar radiation α transmitted through the glazing of the opening 108 of the building 1. Indeed, a comparison of the indoor 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 S _c but does not make it possible to indicate whether this overheating is linked to the solar radiation α or to another phenomenon such as the operation of an oven in a living room, or to an 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 indoor temperature.

This is more particularly illustrated in on which the overheating situations S _c are indicated in dotted lines, while the overheating dynamics D _SC are indicated in solid lines. When the evolution of the indoor temperature T is increasing, the interior of the building 1 heats up and can, if the indoor temperature T becomes higher than the maximum value T _c ⁺ of the comfort temperature range, move into an overheating situation S _C . In other words, the method, by means of the overheating dynamics parameter PD _SC , 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 D _SC .

As illustrated in the , building 1 can be both in an overheating situation S _C , and in an overheating dynamic D _SC , or only in an overheating situation S _C or in an overheating dynamic D _SC .

When the evolution of the indoor temperature T is decreasing, the interior of the building 1 cools down. In this situation, the indoor temperature T can still be higher than the maximum value T _c ⁺ of the comfort temperature range, i.e. the building 1 can still be in an overheating situation S _c . However, if cooling is in progress, there is no longer any overheating dynamic D _SC and the closing of the solar protections 3 unnecessarily reduces the visual comfort of the users, or even slows down said cooling.

To discriminate an overheating dynamic D _SC linked to solar radiation α, 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.

The method also comprises a comparison step determining the overheating dynamics parameter PD _SC which is representative of a detection of an actual or future overheating situation S _c inside the building.

According to one embodiment, the solar protection 3 takes a deployed position when the overheating dynamics parameter PD _SC is in an active state.

Conversely, when the overheating dynamics parameter PD _SC is in the inactive state, there is no longer any overheating dynamics D _SC , the solar protection 3 can take a folded position or remain in its position.

The overheating dynamics parameter PD _SC is determined on the basis of temperature information, this being only the indoor temperature T of the building considered. More precisely, the temperature information is only derived from a succession of indoor temperature measurements spaced by a sampling time interval, the latter preferably being between 0h and 1h, for example 15 minutes.

The superheating dynamics parameter PD _SC is determined at least as a function of a comparison of a change in the interior temperature T over a first time interval t1 with a superheating rate V _SC .

According to one embodiment, the first time interval t1 is between 0h and 3h, preferably between 0h and 1h, for example 30min.

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.

The superheating rate V _SC is determined, or calibrated, so as to be representative of a superheating dynamic D _SC of the building 1 linked to the solar radiation α. According to one embodiment, the superheating rate V _SC is expressed by a temperature over a duration, for example in °C/h. According to one embodiment, the superheating rate is positive or zero.

According to one embodiment, the superheating rate V _SC is constant over the first time interval.

According to one embodiment, the overheating rate V _SC depends on the measured interior temperature T.

According to one embodiment, the overheating rate V _SC depends on an average value T _avg of the interior temperature T measured over a second time interval.

Using the average value T _avg of the indoor temperature makes it possible to limit a certain number of false detections.

According to one embodiment, the second time interval is between 0h and 3h, preferably between 0h and 1h, for example 30min.

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

For example, the superheating rate V _SC is calculated by the formula below:

With :

V _SC : the superheating rate in °C/h

T _C ⁺ : the maximum value of the comfort temperature range

t1: the first time interval

T _avg : the average value of the indoor temperature T measured over a second time interval.

When the superheating rate V _SC depends on the interior temperature T, it is more representative of an increase in the interior temperature T linked to solar radiation α.

For example, the closer the indoor temperature T is to the maximum value T _C ⁺ of the comfort temperature range, the lower the overheating rate V _SC will be. In other words, the closer the indoor temperature T is to the maximum value T _C ⁺ of the comfort temperature range, the less an increase in the indoor temperature T is allowed, and the more the solar protections 3 are closed.

According to one embodiment, the superheating dynamics parameter PD _SC is also determined based on a comparison of a value representative of the interior temperature T with a superheating temperature range [T _sc ^- , T _sc ⁺ ].

According to one embodiment, the representative value of the interior temperature T is determined by an average T _avg3 of the interior temperature over a third time interval.

Using the average value T _avg3 of the indoor temperature makes it possible to limit a certain number of false detections.

According to one embodiment, the third time interval is between 0h and 3h, preferably between 0h and 1h, for example 30min.

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

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

The superheat temperature range [T _sc ^- , T _sc ⁺ ] includes at least a low superheat temperature threshold T _sc ^- and an high superheat temperature threshold T _sc ⁺ .

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

According to one embodiment, the overheating temperature range [T _sc ^- , T _sc ⁺ ] corresponds to the comfort temperature range.

The superheat dynamics parameter PD _SC varies depending on whether the representative value of the indoor temperature T is below, within or above the superheat temperature range [T _sc ^- , T _sc ⁺ ]. In particular, the superheat dynamics parameter PD _SC also varies depending on the value of the indoor temperature T in the superheat temperature range [T _sc ^- , T _sc ⁺ ].

According to one embodiment, the superheating dynamics parameter PD _SC 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 V _SC .

According to one embodiment, the superheat dynamics parameter PD _SC is in the active state when the value representative of the interior temperature T is included in the superheat temperature range [T _sc ^- , T _sc ⁺ ].

According to one embodiment, the superheating dynamics parameter PD _SC is in the active state when the value representative of the interior temperature T is greater than a high superheating temperature threshold T _sc ⁺ of the superheating temperature range [T _sc ^- , T _sc ⁺ ] and the change in the interior temperature T over the first time interval t1 is greater than zero.

For example, the PD _SC superheat dynamics parameter is in the active state when:

And

With :

V _SC : the superheating rate in °C/h

T _SC ⁺ : the upper threshold of the overheating temperature range

T _SC ^- : the lower threshold of the overheating temperature range

T _avg3 : the average value of the indoor temperature T measured over the third time interval

D _T : the evolution of the interior temperature over the first time interval t1

Thus, if the representative value of the interior temperature T is included in the overheating temperature range [T _sc ^- , T _sc ⁺ ] and the change D _T of the interior temperature T over the first time interval t1 is greater than the overheating rate V _SC , or if the representative value of the interior temperature T is greater than the high overheating temperature threshold T _SC ⁺ and the change D _T 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 .

Alternatively, the PD _SC superheat dynamics parameter is in the active state when:

With :

T _avg3 : the average value of the indoor temperature T measured over the third time interval

D _T : the evolution of the interior temperature over the first time interval t1

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

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.

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

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

According to one embodiment, the fourth time interval is between 0h and 3h, preferably between 0h and 1h, for example 30min.

According to one embodiment, the duration of sustainable overheating is between 0h and 3h, preferably between 0h and 1h, for example 30min.

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.

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

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.

Thus, the method helps prevent overheating situations in a building, particularly during the summer season, and limits false detections of overheating dynamics. The particular interest of this method is to rely mainly, or even solely, on indoor temperature measurement, in other words to avoid the need for measurements or recovery of outdoor temperature information, which can be complex to implement and/or unreliable.

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

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.

Such a local control unit 12 is shown according to a first embodiment in and according to a second embodiment in .

• un socle ;
• un bouton 125 de commande comprenant au moins deux zones 126, 127 d’appui notamment de manière sensiblement orthogonale à un plan principal P de l’unité de commande locales 12;
• une unité de gestion 102 ;
• un dispositif de mesure 104 d’une température.

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.

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.

• un bouton 101 glisseur comprenant une embase 122 et un élément 103 d’actionnement manuel formant saillie par rapport à l’embase 122, , le bouton 101 glisseur présentant notamment un degré de liberté dans un sens où il peut être manœuvré pour se déplacer le long d’un axe A1 de déplacement.
• une lumière 105 formée dans une paroi 134 du bouton de commande 125, ladite lumière 105 étant traversée par l’élément 103 d’actionnement manuel afin d’autoriser la manœuvre de l’élément 103 d’actionnement manuel à la surface du bouton de commande 125 ;

The local control unit 12 may also include, as illustrated in :

• 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 authorize the maneuvering of the manual actuation element 103 on the surface of the control button 125;

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.

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.

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

In particular, the management method can involve a clock, embedded in the management unit, to determine a reference time from which one or two maximum commands to close the at least one solar protection over a period of 24 hours can be implemented when an overheating dynamic is detected.

Of course, the invention is not limited to the embodiments described and shown in the attached figures. Modifications remain possible, in particular 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 (13)

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 measuring device (104) for an interior temperature of the building (1), the method being implemented by the management unit (102) located inside the building and comprising:

• A measuring step in which the indoor temperature (T) is measured;
• A comparison step in which a superheating dynamics parameter (PD _SC ) is determined based on a comparison of an evolution (D _T ) of the interior temperature (T) over a first time interval (t1) with a superheating rate (V _SC );
• A step of controlling the position taken by the solar protection (3) according to the overheating dynamic parameter (PD _SC ).

Management method according to claim 1, in which the overheating rate (V _SC ) depends on the measured interior temperature (T). Management method according to claim 2, in which the overheating rate (V _SC ) depends on an average value of the interior temperature (T) measured over a second time interval. Management method according to any one of the preceding claims, in which the evolution (D _T ) 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). 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 (PD _SC ) is in an active state. Management method according to claim 5, in which the overheating dynamic parameter (PD _SC ) is in the active state when the evolution (D _T ) of the interior temperature (T) over the first time interval (t1) is greater than the overheating speed (V _SC ). Management method according to any one of the preceding claims, in which the overheating dynamic parameter (PD _SC ) is also determined as a function of a comparison of a value representative of the interior temperature (T) with an overheating temperature range ([T _sc ^- , T _sc ⁺ ]). Management method according to claim 7, in which the representative value of the interior temperature (T) is determined by an average (T _avg3 ) of the interior temperature over a third time interval. Management method according to any one of claims 5 or 6, taken in combination with claim 7 or 8, in which the overheating dynamic parameter (PD _SC ) is in the active state when the value representative of the interior temperature (T) is included in the overheating temperature range ([T _sc ^- , T _sc ⁺ ]). Management method according to claim 9, in which the overheating dynamic parameter (PD_SC) is in the active state when the representative value of the interior temperature (T) is greater than a high threshold (T_sc ⁺) overheating temperature of the overheating temperature range ([T_sc ^-, T_sc ⁺]) and that the evolution of the interior temperature (T) over the first time interval (t1) is increasing. 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 (PDD _SC ) is in an active state when the overheating dynamic parameter (PD _SC ) is in an active state for a sustainable overheating duration over a fourth time interval. Terminal of a home automation installation (100) implementing a method according to any one of the preceding claims. 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.