Device for controlling a domestic electrical appliance by radiofrequency signals, domestic electrical appliance and domestic electrical system comprising such a control device

Abstract

Device for controlling a domestic electrical appliance using radiofrequency signals, domestic electrical appliance and domestic electrical system comprising such a control device The invention relates to a device for controlling an electrical load of a domestic electrical appliance using radiofrequency signals. A radiofrequency module, capable of receiving and / or transmitting radiofrequency signals in a predetermined frequency band (BdF), comprises a reception input and / or a transmission output and a reference terminal. A coupling circuit connects a first electrical conductor to the reception input and / or the transmission output and separates certain radiofrequency signals in the predetermined frequency band (BdF), from other radiofrequency signals, and directs the separated radiofrequency signals to the reception input and / or the transmission output of the radiofrequency module.A blocking circuit connects a second electrical conductor to the reference terminal of the radio frequency module and blocks radio frequency signals flowing from the second electrical conductor to the reference terminal over a frequency range (PdF) having a negative frequency asymmetry, relative to the predetermined frequency band (BdF). Figure for abstract: 4.

Description

Title of the invention: Device for controlling a domestic electrical appliance using radiofrequency signals, domestic electrical appliance and domestic electrical system comprising such a control device Technical field

[0001] The present invention relates to a device for controlling a domestic electrical appliance by radiofrequency signals. It also relates to a domestic electrical appliance comprising such a control device, as well as a domestic electrical system comprising such an appliance. State of the Art

[0002] A radio frequency signal control device for a domestic electrical appliance is electrically powered by a first conductor and a second conductor of a power supply source. Such a control device comprises a radio frequency module, a receiving input and / or a transmitting output of which is coupled to the first electrical conductor, so as to transmit and / or receive radio frequency signals in a predetermined frequency band, the radio frequency module being electrically connected to an electrical ground of the radio frequency signal control device. The electrical conductors of the power supply source act here as a radio antenna, thus saving a dedicated radio antenna wire.

[0003] It is known to electrically power such a device with an alternating current power source, such as the mains, by electrically connecting the second electrical conductor to electrical ground. This is, for example, described in FR 2 930 093 AL

[0004] A disadvantage of such a device is that, when one seeks to power it by a direct current electrical power source with equivalent load, the quantity of current flowing from the first electrical conductor to the second electrical conductor to electrically power this device is significantly greater than for an alternating current electrical power source, for example of the order of several amperes.

[0005] Furthermore, the insulation between the first electrical conductor and the second electrical conductor is generally reduced between an alternating current electrical power cable and a direct current electrical power cable, in particular for compliance with electrical safety standards of the devices. electrical. Thus, this increases the capacitive and / or inductive coupling value between the first electrical conductor and the second electrical conductor.

[0006] Individually or in combination, the increase in the amount of current and the increase in coupling results in a radio frequency signal flowing on the first electrical conductor also being found between the second conductor and the electrical ground by capacitive coupling and / or inductive coupling between the first conductor and the second conductor, thus creating undesirable common mode likely to reduce the capacity of the radio frequency module to transmit and / or receive radio frequency signals.

[0007] It is therefore desirable to be able to have a device capable of being powered by a direct current electrical power source of which at least one of the wires acts as a radiofrequency antenna while preserving the radioelectric performance of the radiofrequency antenna. Summary of the invention

[0008] To this end, the invention relates, according to a first aspect, to a device for controlling an electrical load of a domestic electrical appliance by radiofrequency signals, the device for controlling by radiofrequency signals and the electrical load being supplied with electrical energy by a first electrical conductor and a second electrical conductor electrically connected to a direct current electrical power source, the device for controlling by radiofrequency signals comprising: - a radio frequency module capable of receiving and / or transmitting radio frequency signals in a predetermined frequency band, the radio frequency module comprising a reception input and / or a transmission output and a reference terminal, - a coupling circuit, the coupling circuit electrically connecting the first electrical conductor to the reception input and / or the transmission output of the radiofrequency module and being configured to separate certain radiofrequency signals carried by the first electrical conductor in the predetermined frequency band, from other radiofrequency signals carried by the first electrical conductor, and direct the radiofrequency signals separated from the other radiofrequency signals to the reception input and / or the transmission output of the radiofrequency module, and - a blocking circuit electrically connecting the second electrical conductor to the reference terminal of the radio frequency module and being configured to block radio frequency signals flowing from the second electrical conductor to the reference terminal of the radio frequency module over a frequency range exhibiting negative frequency asymmetry, relative to the predetermined frequency band.

[0009] Thanks to the invention, the radiofrequency signal control device selectively blocks radiofrequency signals flowing from the second electrical conductor to the reference terminal of the radiofrequency module over a predetermined frequency range, while adjusting the gain of the control device as a function of the frequency. The control device allows the electrical energy necessary to power the load to pass, while blocking interference in a frequency range where it is appropriate to favor a differential mode between a reception and / or transmission input and a reference terminal of the radiofrequency module.

[0010] According to advantageous and non-mandatory aspects of the invention, such a control device may incorporate one or more of the following features, taken in any technically admissible combination. - The radio frequency signal control device further comprises a power supply module, while the coupling circuit electrically connects the first electrical conductor to a first terminal of the power supply module, such that the coupling circuit blocks, at least on the predetermined frequency band, the electrical signals flowing from the first electrical conductor to the first terminal of the power supply module, and while a second terminal of the power supply module is electrically connected to the reference terminal of the radio frequency module to electrically power at least one module of the radio frequency signal control device. - The frequency range is delimited by a lower limit, the value of which is between 8 megahertz and 13.56 megahertz, preferably between 8 megahertz and 12 megahertz, more preferably equal to approximately 10 megahertz. - The blocking circuit comprises a capacitor, a first low-frequency inductor and a second high-frequency inductor distinct from the first inductor, the first inductor and the second inductor being electrically connected together in series and electrically connected together in parallel with the capacitor, such that the combination of the capacitor with the first inductor and the second inductor forms a resonant circuit electrically connecting the second electrical conductor to the reference terminal of the radio frequency module, and blocking electrical signals flowing from the second electrical conductor to the reference terminal over the frequency range. - The blocking circuit comprises a capacitor and a single inductor, preferably of the surface-mounted component type, combining low-frequency and high-frequency properties and electrically connected in parallel with the capacitor, such that the combination of the capacitor with the single inductor forms a resonant circuit electrically connecting the second electrical conductor to the reference terminal of the radio frequency module, and blocking electrical signals flowing from the second electrical conductor to the reference terminal over the frequency range. - The blocking circuit comprises a capacitor, a first inductance, called high-frequency, and a second inductance, called low-frequency, distinct from the first inductance, the first inductance being electrically connected in parallel with the capacitor, such that the combination of the capacitor with the first inductance forms a resonant circuit electrically connecting the second electrical conductor to the reference terminal of the radiofrequency module and blocking the electrical signals flowing from the second electrical conductor to the reference terminal over the frequency range and in that the second high-frequency inductance is electrically connected between a second end of the resonant circuit and a terminal of the blocking circuit intended to be connected to the electrical load of the domestic electrical appliance. - A first end of the resonant circuit is electrically connected to a first electrical ground, itself electrically connected to the reference terminal of the radiofrequency module and in that the second high-frequency inductance is connected, opposite the resonant circuit, to a second electrical ground, distinct from the first electrical ground.

[0011] According to a second aspect, the invention relates to a domestic electrical appliance comprising at least one electrical load and a radiofrequency signal control device as described previously.

[0012] According to a third aspect, the invention relates to an electrical system comprising a domestic electrical appliance, a direct current electrical power source for the domestic electrical appliance and a remote control device, characterized in that the domestic electrical appliance comprises at least one electrical load and a radiofrequency signal control device as described above and in that the radiofrequency signal control device is configured to receive radiofrequency signals representative of control instructions transmitted by the remote control device.

[0013] Such an apparatus and such a system induce the same advantages as those mentioned above concerning the control device of the invention.

[0014] According to advantageous and non-mandatory aspects of the invention, such a domestic electrical system may incorporate one or more of the following features, taken in any technically admissible combination.

[0015] - The direct current power source is provided by a network domestic direct current power supply, or by a battery.

[0016] - The direct current power supply comprises a panel photovoltaic panel arranged externally to the domestic electrical appliance and in that the radiofrequency signal control device further comprises a rechargeable battery arranged inside the domestic electrical appliance and electrically connected to the electrical power supply module, the rechargeable battery being configured to be recharged by the electrical energy supplied by the photovoltaic panel. Brief description of the figures

[0017] The present invention will be better understood with the aid of the following description with reference to the appended figures, given solely by way of example and in which identical reference signs correspond to structurally and / or functionally identical or similar elements.

[0018] [Fig-1] [Fig.l] is a basic electrical diagram of an electrical system domestic, incorporating a domestic electrical appliance, with a radio frequency signal control device according to a first embodiment of the invention, a direct current power supply and a remote device;

[0019] [Fig.2] [Fig.2] is a basic electrical diagram of a coupling circuit belonging to the radiofrequency signal control device shown in [Fig.l];

[0020] [Fig.3] [Fig.3] is a basic electrical diagram similar to [Fig.2], for a coupling circuit belonging to a radiofrequency signal control device according to a second embodiment of the invention;

[0021] [Fig.4] [Fig.4] schematically represents the variations of a current gain of the radiofrequency signal control device represented in [Fig.l], as a function of the frequency of the radio waves;

[0022] [Fig.5] [Fig.5] is a basic electrical diagram of a blocking circuit belonging to the radio frequency signal control device shown in [Fig.l];

[0023] [Fig.6] [Fig.6] is a basic electrical diagram similar to [Fig.l] of a domestic electrical system, incorporating a signal control device radio frequencies according to a third embodiment of the invention, a direct current power supply and a remote device;

[0024] [Fig.7] [Fig.7] is a basic electrical diagram of a blocking circuit belonging to the radio frequency signal control device shown in [Fig.6];

[0025] [Fig.8] [Fig.8] is a schematic electrical diagram similar to [Fig.l] of a domestic electrical system, incorporating a radio frequency signal control device according to a fourth embodiment of the invention, a direct current power supply and a remote device; and

[0026] [Fig.9] [Fig.9] is a basic electrical diagram similar to [Fig.l] of a domestic electrical system, incorporating a radio frequency signal control device according to a fifth embodiment of the invention, a direct current power supply and a remote device. Detailed description

[0027] With reference to [Fig.l], a domestic electrical appliance 5 comprises a radio frequency signal control device 1 configured to be electrically connected to a direct current power source 2, and to control an electrical load 3 which belongs to the domestic electrical appliance 5. The radio frequency signal control device 1 is arranged to cooperate with a remote device 4.

[0028] The direct current power supply source 2, the remote device 4 and the domestic electrical appliance 5 belong to a domestic electrical system 10 according to the invention.

[0029] According to one embodiment, the electrical load 3 is internal to a housing of the domestic electrical appliance 5.

[0030] According to an alternative embodiment, the electrical load 3 is external to a housing of the domestic electrical appliance 5, while belonging to the domestic electrical appliance.

[0031] The remote device 4 is configured to at least transmit to the radiofrequency signal control device 1 radiofrequency signals representative of control instructions to be executed by the electrical load 3.

[0032] The remote device 4 may be, for example, a remote control, a smartphone, a tablet, a multi-service box dedicated to the management of at least one building, a computer connected to a communications network, or any other equivalent device capable of transmitting at least one control order. It may be a radiofrequency order transmitter, nomadic or fixed.

[0033] The remote device 4 is either of the unidirectional type, i.e. purely transmitter, or of the bidirectional type, i.e. transmitter and receiver. For this purpose, it comprises at least one radiofrequency module (not shown) configured to transmit and optionally receive radiofrequency signals representative of control instructions on at least one frequency and at least one communication protocol intended for the radiofrequency signal control device 1, in order to control at least one electrical load 3.

[0034] In the example of the figures, the domestic electrical appliance 5 comprises an electrical load 3. The number of electrical load(s) 3 of the domestic electrical appliance 5 is not limiting and may be greater than or equal to 2.

[0035] The electrical load 3 may be intended, for example, for thermal, visual or luminous comfort, for solar protection, for closing and / or for the security of a building or its surroundings. The electrical load 3 may be a lighting element, such as a halogen or light-emitting diode bulb, an electric pump, a heater, an air conditioner, a ventilation device, an alarm siren. The electrical load 3 may also be an electric motor of an electromechanical actuator comprising said radiofrequency signal control device 1, and in particular an electric motor consuming a high intensity current, in particular greater than 2.5 amperes. The electromechanical actuator may be intended to move a movable screen, such as a roller shutter, an awning, a Venetian blind, a door, a gate, a grille, a window or a hatch.

[0036] For the purposes of the invention, the direct current power supply source 2 is an electrical power source delivering an electric current whose intensity is constant, in other words independent of time. The direct current power supply source 2 is commonly called a CC power supply (for "direct current" according to French terminology, or DC power supply (for "direct current" according to Anglo-Saxon terminology). In a known manner, the direct current power supply source 2 comprises a positive pole "+", in other words a pole positively charged with electrons, and a negative pole "-", in other words a pole negatively charged with electrons, the direct current power supply source 2 being configured to direct the electrons from the positive pole "+" to the negative pole "-".

[0037] The direct current power supply source 2 is external to the domestic electrical appliance 5, therefore to the radio frequency signal control device 1. In other words, it is arranged outside the radio frequency signal control device 1.

[0038] The radio frequency signal control device 1 is electrically connected to the direct current power supply source 2 via at least two electrical conductors 21, 22.

[0039] According to one embodiment, the direct current power supply source 2 is of the very low voltage type, in particular delivers a voltage of less than 50 volts, for example 48 volts under 2.5 amps, or 24 volts under 5 amps, or 12 volts under 10 amps, or 8 volts under 15 amps. For example, the direct current power supply source is a domestic direct current power supply network, or a direct current power supply device such as an AC / DC converter electrically connected to the mains.

[0040] According to an alternative embodiment, the direct current electrical power source 2 is a photovoltaic electrical power supply device comprising at least one photovoltaic panel (or solar panel) and a rechargeable battery (not shown), the rechargeable battery being electrically connected to the photovoltaic panel via at least two electrical conductors to be recharged by the at least one photovoltaic panel. In this alternative embodiment, the rechargeable battery is configured to electrically power the radiofrequency signal control device 1 and / or the electrical load 3 and / or the domestic electrical appliance 5. The rechargeable battery may be integrated into the domestic electrical appliance 5, or be external to the domestic electrical appliance 5, for example in a cabinet inside which the domestic electrical appliance 5 is mounted.In the case where the rechargeable battery is integrated into the domestic electrical appliance 5, the electrical conductors electrically connecting the direct current power source 2 to the radio frequency signal control device 1 are those arranged between the photovoltaic panel and the radio frequency signal control device 1. In the case where the rechargeable battery is external to the domestic electrical appliance 5, the electrical conductors electrically connecting the direct current power source 2 to the radio frequency signal control device 1 are those arranged between the assembly formed by the photovoltaic panel with the rechargeable battery and the radio frequency signal control device 1.The photovoltaic panel is arranged outside the radio frequency signal control device 1, for example on a surface of the box inside which the radio frequency signal control device 1 is mounted, the surface being oriented towards the outside of a building to capture solar energy.

[0041] According to one embodiment, the first electrical conductor 21 and the second electrical conductor 22 are integrated into an electrical power supply cable electrically connecting the radiofrequency signal control device 1 to the source direct current power supply 2. The power supply cable may consist of a plurality of power supply cable portions connected in series between the direct current power source 2 and the radio frequency signal control device 1.

[0042] The electrical load 3 is connected to the first conductor 31 by a first terminal 31 and to the second conductor 22 by a second terminal 32.

[0043] The radio frequency signal control device 1 comprises a coupling circuit 11, a power supply module 12, a radio frequency module 13, a control module 14 and a blocking circuit 18.

[0044] The radiofrequency signal control device 1 is configured to be supplied with electrical energy by the direct current electrical power source 2; for this purpose it comprises at least two power supply terminals 15, 16.

[0045] Each of the two power supply terminals 15, 16 is intended to be electrically connected to one end of an electrical conductor 21, 22 of the direct current electrical power source 2.

[0046] The radiofrequency signal control device 1 comprises at least one control output terminal 17 of at least one electrical load 3. The control output terminal 17 is configured to electrically control at least one electrical load 3.

[0047] Advantageously, the electrical load 3 comprises control means such as switches or transistors configured to control the at least one electrical load 3. By way of non-limiting example, the electrical load 3 comprises an electric motor 3 of the direct current type and control means constituting an H-bridge for controlling an electric motor from the control output terminal 17.

[0048] Advantageously, all or part of the first electrical conductor 21 forms a radio antenna adapted to receive and / or transmit radiofrequency signals. In reception, an electromagnetic field is converted by the first electrical conductor 21 into electrical quantities, in particular voltage and current, constituting an electrical signal circulating in the first electrical conductor 21. In transmission, the first electrical conductor 21 converts the electrical quantities, in particular the voltage and the current, of an electrical signal circulating in the first electrical conductor 21 into electromagnetic quantities in the space around the first electrical conductor, constituting an electromagnetic field.

[0049] According to the first embodiment illustrated in Figures 1, 2 and 4, a radiofrequency coupling between the direct current power supply source 2 and the radiofrequency module 13 is carried out on the first electrical conductor 21 electrically connected to a positive pole “+” of the direct current power supply source 2. direct current 2. The second conductor 22 is electrically connected to a negative pole “-” of the direct current power supply source 2. The first electrical conductor 21 is connected to the first power supply terminal 15 of the radio frequency signal control device 1 and the second electrical conductor 22 is electrically connected to the second power supply terminal 16 of the radio frequency signal control device 1.

[0050] Advantageously, the radiofrequency signal control device 1 comprises a first portion of electrical power supply cable of a predetermined length, the predetermined length being greater than or equal to a quarter of the wavelength associated with the transmission and / or reception frequency of the radiofrequency module 13.

[0051] By way of non-limiting examples, the first portion may have a length of the order of 173 millimeters when the frequency of transmission and / or reception of radiofrequency signals is of the order of 433 megahertz (MHz), of the order of 86 millimeters when the frequency band BdF of transmission and / or reception of radiofrequency signals is of the order of 868 megahertz, and of the order of 30.6 millimeters when the frequency band BdF of transmission and / or reception of radiofrequency signals is of the order of 2.4 gigahertz.

[0052] The radiofrequency signals propagating on the first electrical conductor 21 constituting the radioelectric antenna comprise at least two radiofrequency components. The radiofrequency signals comprise a first component called “low frequency” (typically of frequency less than 8 megahertz) corresponding to electrical power supply signals, and a second component called “high frequency” comprising at least radiofrequency signals representative of control orders picked up by the first electrical conductor and propagating on the latter. The so-called high frequency component also comprises other radiofrequency signals picked up by the first electrical conductor 21 and / or conducted by the latter via the direct current electrical power source 2.

[0053] The coupling circuit 11 is configured to filter electrical signals propagating on the first electrical supply conductor 21 of the direct current electrical power source 2.

[0054] The coupling circuit 11 comprises several input / output terminals.

[0055] Advantageously, the coupling circuit 11 comprises three input / output terminals 111, 112, 113. A first terminal 111 is electrically connected to the first power supply terminal 15. A second terminal 112 is electrically connected to a first terminal 121 of the electrical power supply module 12. A third terminal 113 is electrically connected to a reception input and / or transmission output terminal 131 of the radiofrequency module 13.

[0056] The first portion of power supply cable of a predetermined length mentioned above is located between terminals 15 and 111.

[0057] The supply current of the power supply module 12, which flows between the terminals 112 and 121, comprises low-frequency signals, with a frequency lower than, for example, 1 megahertz.

[0058] The coupling circuit 11 is configured to separate different components of the electrical signals propagating on the first electrical conductor 21 and to direct each separated component to a terminal 112 or 113 of the coupling circuit IL

[0059] More precisely, the coupling circuit 11 is arranged to separate certain radiofrequency signals carried by the first electrical conductor 21 at a predetermined frequency, from the other radiofrequency signals carried by the first electrical conductor and which have different frequencies, and to direct the signals at the predetermined frequency to the third terminal 113 of the coupling circuit IL. Advantageously, the predetermined frequency corresponds to a median frequency fm of the predetermined frequency band BdF, used to transmit the radiofrequency signals emitted by the remote device 4 and picked up by the radiofrequency module 13. The coupling circuit 11 is tuned to the median frequency fm.

[0060] The coupling circuit 11 is, furthermore, configured to block the propagation of certain radiofrequency signals between the first terminal 111 and the second terminal 112 of the coupling circuit 11. The radiofrequency signals whose propagation is blocked correspond to signals whose frequency is different from that of the power supply signals, therefore greater than 1 megahertz in the example mentioned above.

[0061] As stated previously, the electrical signals entering via the first terminal 111 into the coupling circuit 11 comprise the superposition of at least one low-frequency power supply signal and one high-frequency signal representative of control orders or status values ​​of a domestic electrical appliance 5 comprising the radiofrequency signal control device 1, the power supply signal and the high-frequency signal being picked up by the first electrical conductor 21 forming the radio antenna. The power supply signal is transmitted, through the coupling circuit 11, to the electrical power supply module 12 and the high-frequency signal is transmitted, through the coupling circuit 11, to the radiofrequency module 13. The propagation of the other high-frequency signals is blocked, or at least limited, within the coupling circuit 11.

[0062] Figures 2 and 3 illustrate two examples of embodiment of such a coupling circuit 11. The coupling circuit 11 comprises at least one inductor, also called “winding”, and at least one capacitor, the inductor and the capacitor being electrically connected in a parallel arrangement in order to form a circuit resonant or blocking circuit, also known as a "trap circuit". The inductance(s) and capacitor(s) of the coupling circuit 11 are sized so that the resonant circuit is tuned to a frequency substantially equal to the frequency of the signals to be separated. This may be the electrical power supply signal or the predetermined frequency band BdF used for the transmission of radiofrequency signals.

[0063] According to one embodiment, the frequency of the predetermined frequency band BdF used for the transmission of the radiofrequency signals representative of the control order is centered on a median frequency fm, greater than 100 megahertz.

[0064] According to particular embodiments, the median frequency value fm of the predetermined frequency band BdF, used for the transmission of the radiofrequency signals representative of the control order, is equal to approximately 433 megahertz, to approximately 868 megahertz or to approximately 2.4 gigahertz.

[0065] According to the first embodiment of the radiofrequency signal control device 1, the coupling module of which is illustrated in [Fig. 2], the coupling circuit 11 comprises an inductor L21 and a capacitor C21 electrically connected in parallel between the first and second terminals 111 and 112. The third terminal 113 of the coupling circuit 11 is connected to the inductor L21 at a point located between the two ends of this inductor L21. In this embodiment, the inductor L21 is fictitiously divided into two windings, coupled and placed in series, the third terminal 113 being connected to the common terminal of these two windings via a decoupling capacitor C2.

[0066] According to a second embodiment of the radiofrequency signal control device 1, the coupling module of which is illustrated in [Fig. 3], the coupling circuit 11 comprises an inductor L22 and two capacitors C22, C23, the inductor L22 being electrically connected in parallel with the two capacitors C22, C23 between the first and second terminals 111 and 112. The two capacitors C22, C23 are electrically connected in series and the third terminal 113 of the coupling circuit 11 is connected to the common point of these two capacitors C22, C23 via a decoupling capacitor C2.

[0067] With reference to [Fig.2] and [Fig.3], the decoupling capacitor C2 makes it possible to block electrical signals of a frequency lower than a predetermined frequency, or cut-off frequency, and to allow the propagation of electrical signals of a frequency higher than this predetermined frequency. Advantageously, the value of this decoupling capacitor C2 is chosen so as to block the propagation of the so-called low frequency electrical supply signals.

[0068] In variants not shown, other structures of the coupling circuit are conceivable.

[0069] The coupling circuit 11 provides a voltage collector to the reception input and / or transmission output terminal 131 of the radiofrequency module 13 to which it is connected. It must be referenced to an electrical ground GND of the radiofrequency signal control device 1. As stated previously, the coupling circuit 11 is connected to the first power supply terminal 15 of the radiofrequency signal control device 1, in particular by its first terminal 111.

[0070] According to the first embodiment of the radio frequency signal control device 1, illustrated in [Fig.l], the coupling circuit 11 is connected to the positive pole “+” of the direct current power supply source 2 via the first conductor 21. In order to prevent a short circuit between the positive pole “+” and the electrical ground GND at low frequencies, the second terminal 112 of the coupling circuit 11 is electrically connected to the electrical ground GND of the radio frequency signal control device 1 via a decoupling capacitor C1.

[0071] Advantageously, the decoupling capacitor C1 makes it possible to avoid the propagation of the power supply signals to the electrical ground GND. The second terminal 112 of the coupling circuit 11 is connected as close as possible to the electrical ground GND. The distance between the connection point of the electrical ground GND and the coupling circuit 11 is strictly less, preferably much less, than a quarter of the wavelength associated with the median frequency fm to which the coupling circuit 11 is tuned. By "much less", we mean at least ten times, or even a hundred times, less.

[0072] With reference to [Fig.l], the coupling circuit 11 is electrically connected to the receiving input and / or transmitting output terminal 131 of the radiofrequency module 13 via a radiofrequency signal connection line 213.

[0073] According to one embodiment, the radiofrequency signal control device 1 comprises an impedance matching circuit, not shown, electrically connected to the reception input and / or transmission output terminal 131 of the radiofrequency module 13. The impedance matching circuit is configured to bring a predetermined impedance value back to the level of the reception input and / or transmission output terminal 131 of the radiofrequency module 13. The predetermined impedance value corresponds to a value substantially equal to the value of the input (or output) impedance of the radiofrequency module 13. The value of the input (or output) impedance is, for example, equal to 50 Ohms.

[0074] According to one embodiment, the impedance matching circuit is a circuit separate from the modules 11 and 13, installed on the radiofrequency signal connection line 213.

[0075] According to an alternative embodiment, the impedance matching circuit is integrated into the coupling circuit 11. The coupling circuit 11 then ensures the two functions of filtering and impedance matching.

[0076] According to one embodiment, the radiofrequency signal control device 1 is installed on a printed circuit board (or PCB for “Printed Circuit Board” according to English terminology). The printed circuit board may be a single-sided, double-sided, single-layer or multi-layer board. At least one face of the board may be fully or partially metallized in order to form a ground plane.

[0077] According to one embodiment, all or part of the inductances of the coupling circuit 11 and / or of the impedance matching circuit are printed inductances.

[0078] According to one embodiment, a printed inductance is, for example, produced in the form of turns printed on a metallized face of the printed circuit board.

[0079] According to an alternative embodiment, all or part of the inductances of the coupling circuit 11 and / or of the adaptation circuit are discrete components, for example Surface Mounted Components commonly designated by the acronym “CMS”, according to French terminology or “SMD” according to Anglo-Saxon terminology.

[0080] The power supply module 12 is supplied with electrical energy by the direct current power supply source 2. The power supply module 12 is configured to electrically supply at least one module of the radio frequency signal control device 1 and / or at least one electrical load 3 of a domestic electrical appliance 5 comprising the radio frequency signal control device 1, from the electrical energy supplied by the direct current power supply source 2.

[0081] Thus, the radiofrequency signal control device 1 makes it possible to electrically power at least one module of the radiofrequency signal control device 1 from the first electrical conductor 21 and second electrical conductor 22 of the direct current electrical power source 2, while using the first electrical conductor 21 as an antenna for the radioelectric radiation.

[0082] According to an embodiment of the power supply module 12, illustrated in [Fig.l], the power supply module 12 comprises two power supply terminals 121, 122. The first power supply terminal 121 is electrically connected to the second terminal 112 of the coupling circuit 11 and the second power supply terminal 122 is electrically connected to the electrical ground GND of the radio frequency signal control device 1.

[0083] Advantageously, the decoupling capacitor C1 is connected between the terminals 121 and 122 of the electrical power supply module 12.

[0084] The power supply module 12 is configured to generate the supply voltage(s) necessary for the operation of the various electronic modules and circuits of the radiofrequency signal control device 1 and / or of a domestic electrical appliance 5 comprising the radiofrequency signal control device 1, from the electrical energy supplied by the direct current electrical power source 2. For this, the power supply module 12 comprises at least one circuit for transforming the voltage of the direct current electrical power source 2 into at least one voltage capable of supplying the various electronic modules and circuits of the radiofrequency signal control device 1 and / or of a domestic electrical appliance 5 comprising the radiofrequency signal control device 1. This may be, for example, a direct voltage with an amplitude equal to approximately 3V, approximately 5V or approximately 12V.

[0085] According to one embodiment of the invention, the radiofrequency module 13 is supplied with electrical energy by the electrical power supply module 12. The radiofrequency module 13 is electrically connected to the electrical power supply module 12, for example via at least two power supply terminals not shown.

[0086] The power supply module 12 is electrically connected to the first power supply terminal 15, via the coupling circuit 11, and to the second power supply terminal 16, via the blocking circuit 18.

[0087] According to one embodiment, the radiofrequency module 13 is a radiofrequency module for receiving radiofrequency signals, capable of receiving radiofrequency signals from the remote device 4 in a predetermined frequency band BdF, the radiofrequency signals being, for example, representative of instructions, i.e. orders, for controlling an electrical load 3 of a domestic electrical appliance 5 comprising the radiofrequency signal control device 1.

[0088] According to an alternative embodiment, the radiofrequency module 13 is a radiofrequency module for transmitting and receiving radiofrequency signals capable of transmitting and receiving radiofrequency signals with the remote device 4 in a predetermined frequency band BdF, the radiofrequency signals being, for example, representative of instructions, i.e. orders, for controlling an electrical load 3 of a domestic electrical appliance 5 comprising the radiofrequency signal control device 1 and / or state values ​​of a household electrical appliance 5 comprising the radio frequency signal control device 1.

[0089] The reception input and / or the transmission output 131 of the radiofrequency module 13 is adapted to, in other words capable of, receiving and / or transmitting radiofrequency signals in a predetermined frequency band BdF. The radiofrequency module 13 comprises at least one reference terminal 132 electrically connected to the electrical ground GND of the radiofrequency signal control device 1.

[0090] According to an embodiment illustrated in [Fig. 1], the radiofrequency module 13 comprises an output terminal 133 connected to a control module 14 of the electrical load 3, the radiofrequency module 13 being configured to deliver, to the control module 14, a control signal for the electrical load 3.

[0091] The radiofrequency module 13 comprises different elements, known to those skilled in the art and not shown, configured to receive and decode radiofrequency signals representative of control orders and possibly to transmit signals representative of information on the reception input terminal and / or transmission output terminal 131. This may be a high-frequency amplifier-demodulator circuit, one or more microcontrollers or processors and / or any other equivalent means.

[0092] The control module 14 also comprises various elements, known to those skilled in the art and not shown, configured to receive and decode signals representative of instructions or control orders transmitted by the radiofrequency module 13 and to emit control signals on the control output terminal 17 of the at least one electrical load 3. This may be one or more microcontrollers or processors and / or any other equivalent means.

[0093] According to an alternative embodiment, the radiofrequency module 13 comprises, in other words integrates, the control module 14 of the electrical load 3, for example in the same microcontroller or processor and / or in any other equivalent means.

[0094] The radiofrequency module 13 is configured to cooperate with a remote device 4 as described previously.

[0095] At least one output voltage of the power supply module 12 may be intended to power the control module 14 of the radiofrequency signal control device 1.

[0096] The control module 14 is configured to execute the commands corresponding to the instructions transmitted by the remote device 4.

[0097] The control module 14 comprises several input, output and / or input / output terminals, a single input 141 and a single output 142 being illustrated in [Fig.l]. The control module 14 is in particular configured to control the electrical load 3 via the control output terminal 17 of the at least one electrical load 3 of the radiofrequency signal control device 1.

[0098] The radiofrequency signal control device 1 is intended to be connected to the electrical load 3, as described previously.

[0099] According to the embodiment illustrated in [Fig.l], the radiofrequency signal control device 1 comprises at least one blocking circuit 18. The blocking circuit 18 comprises at least two input / output terminals 181, 182. The first terminal 181 is electrically connected to the second electrical conductor 22 via the second power supply terminal 16. The second terminal 182 is electrically connected to the reference terminal 132 of the radiofrequency module 13, and therefore to the electrical ground GND of the radiofrequency signal control device 1.

[0100] The blocking circuit 18 electrically connects the second electrical conductor 22 to the reference terminal 132 of the radio frequency module 13, such that the blocking circuit 18 blocks radio frequency signals flowing from the second electrical conductor 22 to the reference terminal 132 of the radio frequency module 13 over a frequency range PdF that is asymmetrical with respect to the predetermined frequency band BdF. In other words, the blocking circuit 18 is configured to block radio frequency signals flowing from the second electrical conductor 22 to the reference terminal 132 of the radio frequency module 13 over a frequency range PdF that is asymmetrical with respect to the predetermined frequency band BdF.

[0101] [Fig.4] represents the current gain, or decibel gain GdB, of the radiofrequency signal control device 1 as a function of the frequency f of the radiofrequency signals which pass through the electrical conductor 21. In this [Fig.4], the frequency f increases from left to right and is represented linearly and the frequency range PdF extends on either side of the frequency band BdF along the abscissa axis, asymmetrically with respect to this frequency band.

[0102] More precisely, the frequency range PdF has a negative asymmetry in terms of frequencies, in other words in frequencies, compared to the frequency band PdF. By "negative", it is meant that the asymmetry of the frequency range PdF compared to the frequency band BdF means that the frequency range PdF is much wider to the left of the frequency band BdF, i.e. towards the low frequencies, than to the right of the frequency band BdF, i.e. towards the high frequencies.

[0103] With reference to [Fig.4], the asymmetric PdF frequency range comprises a first cut-off frequency fcl located below, in other words to the left, of the predetermined BdF frequency band and a second cut-off frequency fc2 located above, in other words to the right, of the predetermined BdF frequency band. The blocking circuit 18 is configured to block radio frequency signals between the first cut-off frequency fcl and the second cut-off frequency fc2, i.e. to bring the decibel gain GdB to zero over the PdF frequency range.

[0104] Here, and as illustrated in [Fig.4], the negative frequency asymmetry of the frequency range PdF is characterized in that a distance L1 defining, along the frequency axis, the part of the frequency range PdF located to the left of the predetermined frequency band BdF, therefore between the first cut-off frequency fcl and the median frequency fm of the predetermined frequency band BdF, is much greater, in particular very much greater than a distance L2 defining the part of the frequency range PdF located to the right of the predetermined frequency band BdF, therefore between the median frequency fm of the predetermined frequency band BdF and the second cut-off frequency fc2.

[0105] Advantageously, the L2 / L1 ratio is between 2% and 60%, preferably between 50% and 60%, more preferably of the order of approximately 55% when the median frequency fm is 433 megahertz.

[0106] Advantageously, the L2 / L1 ratio is between 2% and 30%, preferably between 20% and 30%, more preferably of the order of approximately 25% when the median frequency fm is 868 megahertz.

[0107] Advantageously, the L2 / L1 ratio is between 2% and 15%, preferably between 8% and 12%, more preferably of the order of approximately 10% when the median frequency fm is 2.4 gigahertz.

[0108] We denote fc as a central frequency, intermediate between the first and second cut-off frequencies fcl and fc2. The central frequency fc is the average of the first and second cut-off frequencies fcl and fc2. We have the relation

[0109] fc = (fcl + fc2) / 2 (equation 1)

[0110] The central frequency fc is located at the same distance L3 from the two cut-off frequencies fcl and fc2, measured along the frequency axis in [Fig.4]. This central frequency fc is located, along the abscissa axis of [Fig.4] at a distance L4 from the median frequency fm of the frequency band BdF. The distance L4 is strictly less than the distance L3. We have the relationship:

[0111] L3 = L2 + L4 (equation 2)

[0112] The frequency fc is the central frequency fc of a band-stop filter whose operation is, in a manner known per se, symmetrical with respect to this central frequency.

[0113] The negative frequency asymmetry of the frequency range PdF with respect to the frequency band BdF, in particular with respect to the median frequency fm, is such that the first cut-off frequency fcl is much lower than the frequencies of the predetermined frequency band BdF, whereas the second cut-off frequency fc2 is slightly higher than the frequencies of the predetermined frequency band BdF.

[0114] Thus, the radiofrequency signal control device 1 blocks radiofrequency signals flowing from the second electrical conductor 22 to the reference terminal 132 of the radiofrequency module 13 over the PdF frequency range while simultaneously allowing:

[0115] - to allow the electrical energy to pass through the coupling circuit 11 low frequencies, lower than the cut-off frequency fcl, supplied by the direct current power supply source 2 to electrically supply at least the electrical load 3,

[0116] - to block with the coupling circuit 11 representative radiofrequency signals of control orders of the electrical load 3 to promote a differential mode between the reception input and / or the transmission input 131 and the reference terminal 132 of the radiofrequency module 13, and

[0117] - to block with the blocking circuit 18 the parasitic radiofrequency signals in common mode over the PdF frequency range, between the cut-off frequencies fcl and fc2, to improve the transmission and / or reception performance of the radiofrequency module 13.

[0118] Advantageously, the first cut-off frequency fcl has a value greater than 8 megahertz and strictly less than 13.56 megahertz, in particular between 8 megahertz and 12 megahertz, for example equal to approximately 10 megahertz.Thus, the radio frequency signal control device allows the electrical energy supplied by the direct current power supply source 2 to pass, since the power supply current comprises signals at a frequency lower than 1 megahertz in the example, while blocking common mode interference radio frequency signals generated, for example, by a device emitting short-range high-frequency communication signals, such as communication signals conforming to the NFC standard (acronym for "Near Field Communication"), or by an energy transformation module of the direct current power supply source 2, the switching frequency of which emits common mode interference on the second electrical conductor 22.

[0119] Advantageously, the second cut-off frequency fc2 is positioned, along the abscissa axis of [Fig.4], close to the frequency band BdF. In other words, the second cut-off frequency fc2 is slightly higher than the maximum frequency of the BdF frequency band, so as to block in the high frequencies only the radiofrequency signals strictly necessary for the creation of a differential mode between the reception input and / or the transmission output 131 and the reference terminal 132 of the radiofrequency module 13. For example, when the frequency value of the predetermined BdF frequency band used for the transmission of the radiofrequency signals representative of the control order is defined around 868 megahertz, the second cut-off frequency can be positioned at 1 gigahertz.

[0120] According to a preferred embodiment of the invention, the blocking circuit 18 is a band-stop filter, also called a “band-reject filter”, or “bell filter”. The band-stop filter behaves symmetrically between the first cut-off frequency fc 1 and the second cut-off frequency fc2, in other words symmetrically with respect to the central frequency fc, the central frequency fc being strictly lower than the frequencies of the predetermined frequency band BdF, in particular much lower than the median frequency fm of the predetermined frequency band BdF.

[0121] According to a first embodiment of the blocking circuit 18, illustrated in [Fig.5], the blocking circuit 18 comprises a capacitor C31, a first inductor L31 and a second inductor L32. The capacitor C31 is electrically connected in parallel with the two inductors L31, L32 electrically connected together in series.

[0122] The two inductors L31, L32 and the capacitor are electrically connected in a parallel arrangement between terminal 181 and terminal 182, in order to form a parallel resonant circuit, also known as a "trap circuit". The two inductors L31, L32 and the capacitor C31 of the blocking circuit 18 are dimensioned so that the parallel resonant circuit blocks between the first terminal 181 and the second terminal 182 radio frequency signals over the frequency range PdF having a negative frequency asymmetry with respect to the predetermined frequency band BdF.

[0123] Thus, the distinction between the first inductance L31 and the second inductance L32 makes it possible to use standard and / or inexpensive electronic components.

[0124] The inductances L31 and L32 as well as the capacitor C31 of the blocking circuit 18 are dimensioned so that the parallel resonant circuit blocks, between the first terminal 181 and the second terminal 182, radio frequency signals on the frequency range PdF having a negative asymmetry with respect to the predetermined frequency band BdF.

[0125] According to a variant not shown of the first embodiment of the blocking circuit 18, the two functional inductances L31 and L32 are grouped under the form of a single physical inductance, preferably of the CMS type, combining low-frequency and high-frequency properties. This single physical CMS inductance is mounted in parallel with a capacitor and constitutes with it a resonant circuit connecting terminals 181 and 182, according to an approach comparable to that explained above for the first embodiment. This variant has the disadvantage of using a non-standard inductance, therefore relatively expensive and difficult to supply, but induces good adaptability of the blocking circuit.

[0126] In a specific and / or particular case where the electrical load 3 consumes a particularly large quantity of current, for example with an intensity greater than 10 amperes, generating low-frequency and high-frequency interference, it may be advantageous to preserve the capacity of the radiofrequency signal control device 1 to transmit and / or receive radiofrequency signals representative of control orders in the predetermined frequency band BdF.

[0127] Third, fourth and fifth embodiments of the invention are shown in Figures 6 to 9. In the following, elements similar to those of the first embodiment of the radiofrequency signal control device 1 bear the same references and operate as explained above. If a reference is mentioned in the description without being shown in one of Figures 6 to 9 or shown in these figures without being mentioned in the description, it designates the element of the first embodiment bearing the same reference.

[0128] In the following, what is mainly described is what distinguishes this third to fifth embodiment from the first embodiment.

[0129] In the third embodiment of the radio frequency signal control device 1, the domestic electrical appliance 5 and the electrical system 10 shown in FIGS. 6 and 7, the second power supply terminal 32 of the electrical load 3 is not electrically connected directly to the second electrical conductor 22, but to a third terminal 183 of the blocking circuit 18, through a connecting line 238.

[0130] According to this third embodiment, the blocking circuit 18, illustrated in [Fig. 7], comprises a capacitor C32, a first inductance L33 called high-frequency, and a second inductance L34 called low-frequency, the second inductance L34 being distinct from the first inductance L33. The first inductance L33 is electrically connected in parallel with the capacitor C32, such that the combination of the capacitor C32 with the first inductance L33 forms a resonant circuit. A first end of the resonant circuit is electrically connected to the second electrical conductor 22 via the first terminal 181 of the blocking circuit 18 and a second end of the circuit resonant is electrically connected to reference terminal 132 of the radiofrequency module 13, in other words to the first electrical ground GND of the radiofrequency signal control device 1, via the second terminal 182 of the blocking circuit 18. The second inductance L34 electrically connects the first end of the resonant circuit and the third terminal 183 of the blocking circuit 18. The second power supply terminal 32 of the electrical load is thus electrically connected to a second electrical ground GND2 of the radiofrequency signal control device, the second electrical ground GND2 being distinct from the electrical ground GND. The second electrical ground GND2 is called “analog electrical ground”, while the first electrical ground GND is called “digital electrical ground”.

[0131] Advantageously, the second electrical ground GND2 is connected to the connecting line 238.

[0132] Thus, the amount of current flowing from the first electrical conductor 21 to the second electrical conductor 22 is divided between the first inductance L33 and the second inductance L34, so that most of this amount of current flows through the second inductance L34, making it possible to improve the radioelectric performance of the radiofrequency signal control device.

[0133] In the fourth embodiment shown in [Fig.8], the poles of the direct current power supply 2 are reversed with respect to the first embodiment, the first electrical conductor 21 being connected to the negative pole “-” of the direct current power supply 2 and the second electrical conductor 22 being connected to the positive pole “+” of the direct current power supply. The radio frequency coupling between the direct current power supply 2 and the radio frequency module 13 is therefore, according to this fourth embodiment, carried out on the first electrical conductor 21 electrically connected to a negative pole “-” of the direct current power supply 2. The coupling circuit 11 is thus connected to the negative pole “-” of the direct current power supply 2 via the first conductor 21.The second terminal 112 of the coupling circuit 11 is electrically connected directly to the electrical ground GND of the radiofrequency signal control device 1, without passing through the decoupling capacitor C1, while the second terminal 182 of the blocking circuit 18 is electrically connected directly to the second power supply terminal 122 of the power supply module 12, also without passing through the decoupling capacitor C1.

[0134] According to this fourth embodiment, the blocking circuit 18 electrically connects the second electrical conductor 22 to the reference terminal 132 of the module. radio frequencies 13 via the decoupling capacitor Cl. The electrical load 3 and the electrical power supply module 12 are, according to this fourth embodiment, polarized in an inverse manner compared to the first embodiment and third embodiment of the radio frequency signal control device 1. Thus, the terminal 31 of the electrical load 3 and the terminal 121 of the electrical power supply module 12 constitute negative electrical power supply poles, while the terminal 32 of the electrical load 3 and the terminal 122 of the electrical power supply module 12 constitute positive electrical power supply poles.

[0135] In the fifth embodiment shown in [Fig.9], the blocking circuit 18 is as shown in [Fig.7] and connected to the electric load 3 as in the third embodiment, while the poles of the direct current power source 2 are reversed with respect to the first embodiment, as in the fourth embodiment. In other words, the fifth embodiment differs from the first embodiment by the cumulative differences of the third and fourth embodiments with respect to the first embodiment.

[0136] Another object of the invention is a domestic electrical appliance 5 intended, for example, for thermal, visual or luminous comfort, solar protection, closing and / or the security of a building or its surroundings. The domestic electrical appliance 5 is intended to be electrically connected to the direct current electrical power source 2 via the first electrical conductor 21 and the second electrical conductor 22 and comprises a radiofrequency signal control device 1 as described previously, as well as an electrical load 3. According to the embodiments shown in the figures, the electrical load 3 is integrated into the domestic electrical appliance 5. According to an alternative embodiment, and as envisaged above, the electrical load 3 is located outside a housing of the domestic electrical appliance 5, while forming part of this appliance.

[0137] Another object of the invention is a home electrical system 10 which comprises the direct current power source 2, the remote device 4 and the home electrical appliance 5 as described above.

[0138] Within the domestic electrical system 10, the domestic electrical appliance 5 is arranged to cooperate with the remote device 4 via the radiofrequency signal control device 1. The remote device 4 is configured to at least transmit radiofrequency signals representative of control instructions to be executed by the electrical load 3.

[0139] The different embodiments and the different variants defined above can be combined in order to generate new embodiments of the invention.

Claims

1. Claims Radiofrequency signal control device (1) of an electrical load (3) of a domestic electrical appliance (5), the radiofrequency signal control device (1) and the electrical load (3) being supplied with electrical energy by a first electrical conductor (21) and a second electrical conductor (22) electrically connected to a direct current electrical power source (2), the radiofrequency signal control device (1) comprising: - a radiofrequency module (13) capable of receiving and / or transmitting radiofrequency signals in a predetermined frequency band (BdF), the radiofrequency module (13) comprising a reception input and / or a transmission output (131) and a reference terminal (132), - a coupling circuit (11), the coupling circuit (11) electrically connecting the first electrical conductor (21) to the reception input and / or the transmission output (131) of the radiofrequency module (13) and being configured to separate certain radiofrequency signals carried by the first electrical conductor (21) in the predetermined frequency band (BdF), from other radiofrequency signals carried by the first electrical conductor, and direct the radiofrequency signals separated from the other radiofrequency signals to the reception input and / or the transmission output (131) of the radiofrequency module (13), and - a blocking circuit (18) electrically connecting the second electrical conductor (22) to the reference terminal (132) of the radiofrequency module (13) and being configured to block radiofrequency signals flowing from the second electrical conductor (22) to the reference terminal (132) of the radiofrequency module (13) over a frequency range (PdF) having a negative frequency asymmetry, relative to the predetermined frequency band (BdF).

2. Radio frequency signal control device (1) according to claim 1, characterized in that the radio frequency signal control device (1) further comprises a power supply module (12), in that the coupling circuit (11) electrically connects the first electrical conductor (21) to a first terminal (121) of the power supply module (12), such that the coupling circuit (11) blocks, at least on the predetermined frequency band (BdF), the electrical signals flowing from the first electrical conductor (21) to the first terminal of the power supply module (12), and in that a second terminal (122) of the power supply module (122) is electrically connected to the reference terminal (132) of the radio frequency module (13) to electrically supply at least one module (13, 14) of the radio frequency signal control device (1).

3. Radio frequency signal control device (1) according to claim 1 or claim 2, characterized in that the frequency range (PdF) is delimited by a lower limit (fcl), the value of which is between 8 megahertz and 13.56 megahertz, preferably between 8 megahertz and 12 megahertz, more preferably equal to approximately 10 megahertz.

4. A radio frequency signal control device according to any one of claims 1 to 3, characterized in that the blocking circuit (18) comprises a capacitor (C31), a first low-frequency inductor (L31) and a second high-frequency inductor (L32) distinct from the first inductor (L31), the first inductor (L31) and the second inductor (L32) being electrically connected together in series and electrically connected together in parallel with the capacitor (C31), such that the combination of the capacitor (C31) with the first inductor (L31) and the second inductor (L32) forms a resonant circuit electrically connecting the second electrical conductor (22) to the reference terminal (132) of the radio frequency module (13), and blocking the electrical signals flowing from the second electrical conductor (22) to the reference terminal (132) over the range of frequencies (PdF).

5. Radiofrequency signal control device according to any one of claims 1 to 3, characterized in that the circuit blocking (18) comprises a capacitor and a single inductor, preferably of the surface-mounted component type, combining low-frequency and high-frequency properties and electrically connected in parallel with the capacitor, such that the combination of the capacitor with the single inductor forms a resonant circuit electrically connecting the second electrical conductor (22) to the reference terminal (132) of the radio frequency module (13), and blocking electrical signals flowing from the second electrical conductor (22) to the reference terminal (132) over the frequency range (PdF).

6. Radiofrequency signal control device according to any one of claims 1 to 3, characterized in that the blocking circuit (18) comprises a capacitor (C32), a first inductance (L33), called high-frequency, and a second inductance (L34), called low-frequency, distinct from the first inductance (L33), the first inductance (L33) being electrically connected in parallel with the capacitor (C32),such that the combination of the capacitor with the first inductance (L33) forms a resonant circuit electrically connecting the second electrical conductor (22) to the reference terminal (132) of the radiofrequency module (13) and blocking the electrical signals flowing from the second electrical conductor (22) to the reference terminal (132) over the frequency range (PdF) and in that the second high-frequency inductance (L34) is electrically connected between a second end of the resonant circuit and a terminal (183) of the blocking circuit intended to be connected to the electrical load (3) of the domestic electrical appliance (5).,

7. Radiofrequency signal control device according to claim 6, characterized in that a first end of the resonant circuit is electrically connected to a first electrical ground (GND), itself electrically connected to the reference terminal (132) of the radiofrequency module (13) and in that the second high-frequency inductance (L34) is connected, opposite the resonant circuit, to a second electrical ground (GND2), separate from the first electrical ground.

8. Domestic electrical appliance (5) comprising at least one electrical load (3) and a radio frequency signal control device (1) according to any one of claims 1 to 7.

9. Domestic electrical system (10) comprising a domestic electrical appliance (5), a direct current power supply source (2) for the domestic electrical appliance and a remote control device (4), characterized in that the domestic electrical appliance (5) is according to the preceding claim and in that the radio frequency signal control device (1) is configured to receive radio frequency signals representative of control instructions transmitted by the remote control device (4).

10. A domestic electrical system according to claim 9, characterized in that the direct current electrical power source (2) is supplied by a domestic direct current electrical power supply network, or by a battery.

11. A domestic electrical system according to claim 9 or claim 10, characterized in that the direct current electrical power source (2) comprises a photovoltaic panel arranged externally to the domestic electrical appliance and in that the radio frequency signal control device (1) further comprises a rechargeable battery arranged inside the domestic electrical appliance (5) and electrically connected to the electrical power supply module (12), the rechargeable battery being configured to be recharged by the electrical energy supplied by the photovoltaic panel.

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