Electric sunshading device and electric sunshading system

Abstract

To provide an electrically-driven sun shading device and an electrically-driven sun shading system that enable reduction of standby power.SOLUTION: A shading member control unit 7 includes: a motor 10 that operates a solar radiation shading member; a microcomputer 31 that controls the operation of the motor 10; a capacitor 50 connected to the microcomputer 31; a power supply circuit 28 that supplies power to the motor 10, the microcomputer 31, and the capacitor 50 from the supply of a commercial AC power supply 17; and a relay 27 connected to the power supply circuit 28. The microcomputer 31 is configured to be able to control the relay 27. The relay 27 is controlled by the microcomputer 31 to be in one of a conductive state in which the commercial AC power supply 17 can be supplied to the power supply circuit 28 and a non-conductive state in which the supply of the commercial AC power supply 17 to the power supply circuit 28 is cut off. When the relay 27 is in the non-conductive state, the capacitor 50 supplies the power stored therein to the microcomputer 31.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a motorized solar shading device and a motorized solar shading system. [Background technology]

[0002] Conventionally, an electric sun shading device includes a sun shading material and a shading material control unit that controls the operation of the sun shading material (see, for example, Patent Document 1). The shading material control unit includes a motor that operates the sun shading material, a microcomputer that controls the operation of the motor, and a power supply circuit that supplies power to the motor and the microcomputer based on, for example, a commercial power supply. The power supply circuit includes, for example, a power transformer, a rectifier circuit, a stabilizing circuit, etc. In such an electric sun shading device, the sun shading material is operated by driving the motor based on the input of a command signal from an operation switch, etc. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2008-163577 Summary of the Invention [Problem to be solved by the invention]

[0004] In the motorized solar shading device of Patent Document 1, the power supplied to the primary coil of the high-power transformer that supplies power to the motor in the power supply circuit is cut off during standby to reduce standby power. However, since power must continue to be supplied to the primary coil of the low-power transformer that supplies power to the microcomputer in the power supply circuit even during standby, there is a problem in that standby power cannot be reduced sufficiently. [Means for solving the problem]

[0005] An electric shading device that solves the above problem is an electric shading device that includes a shading material and a shading material control unit that controls the operation of the shading material based on a command signal output from a command source, wherein the shading material control unit includes a motor that operates the shading material, a motor control unit that controls the operation of the motor, an electric storage member connected to the motor control unit, a power supply circuit that supplies power to the motor, the motor control unit, and the shading material based on the supply of power, and a relay connected to the power supply circuit, wherein the relay is in either a conductive state that allows the power to be supplied to the power supply circuit, or a non-conductive state that cuts off the supply of power to the power supply circuit, and when the relay is in the non-conductive state, the electric storage member supplies the power that it has stored to the motor control unit, and the motor control unit is capable of controlling the relay and changes the relay from the non-conductive state to the conductive state based on the signal output from the command source.

[0006] In the above-mentioned electric solar shading device, when the time during which no command signal from the command source is input to the shading material control unit reaches a predetermined specified time, the motor control unit may be configured to change the relay, which is in the conductive state, to the non-conductive state.

[0007] In the above-described electric solar shading device, the power storage member may be configured to store the power supplied from the power supply circuit when the relay is in the conductive state. In the above-described motor-driven solar shading device, when the motor is driven by power supplied from the power supply circuit, power may also be supplied from the power supply circuit to the electricity storage member.

[0008] In the above-mentioned electric solar shading device, when the voltage of the storage member falls below a predetermined specified value, the motor control unit may bring the relay into the conductive state to enable power supply from the power supply circuit to the storage member.

[0009] An electric shading system that solves the above problem is an electric shading system comprising a plurality of electric shading devices, each having a shading material and a shading material control unit that controls the operation of the shading material based on a command signal, and a command source that outputs the command signal, wherein the shading material control unit of each electric shading device comprises a motor that operates the shading material, a motor control unit that controls the operation of the motor, a storage element connected to the motor control unit, a power supply circuit that supplies power to the motor, the motor control unit, and the shading material based on the supply of power, and a relay connected to the power supply circuit, wherein the relay is in either a conductive state that allows the power to be supplied to the power supply circuit, or a non-conductive state that cuts off the supply of power to the power supply circuit, and when the relay is in the non-conductive state, the storage element supplies the power that it has stored to the motor control unit, and the motor control unit is capable of controlling the relay, and changes the relay from the non-conductive state to the conductive state based on the signal output from the command source. [Effects of the Invention]

[0010] The motorized solar shading device and motorized solar shading system disclosed herein have the effect of reducing standby power consumption. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a block diagram showing a schematic configuration of an electric solar shading system according to an embodiment. [Figure 2] 3 is a block diagram showing the electrical configuration of a shading material control unit in the electric solar shading device of the same embodiment. FIG. [Figure 3] FIG. 2 is a block diagram showing a power supply circuit in the shielding material control unit of the same embodiment. [Figure 4] 10 is a flowchart showing the operation of a shielding material control unit in the embodiment. [Figure 5] 10 is a flowchart showing the operation of a shielding material control unit in the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, an embodiment of an electric solar shading device and an electric solar shading system will be described with reference to the drawings. As shown in FIG. 1, the electric shading system S of this embodiment includes a floor controller 1, a central control device 3 such as a personal computer, a plurality of electric shading devices 5, and an operation switch 8. For example, a plurality of electric shading devices 5 are installed on each of a plurality of floors of a building. The electric shading devices 5 are, for example, horizontal electric blinds. A floor controller 1 is installed on each floor. The floor controller 1 on each floor is connected to the central control device 3 via a communication line 2a.

[0013] Each of the multiple motorized solar shading devices 5 includes a head box 6, a solar shading material 11, and a shading material control unit 7 that controls the operation of the solar shading material 11. The solar shading material 11 is, for example, a slat suspended from the head box 6. The shading material control unit 7 is housed within the head box 6.

[0014] The floor controller 1 is connected via communication line 2c to the shading material control units 7 of the multiple electric solar shading devices 5 installed on that floor. The operation switch 8 is connected via communication line 2d to the shading material control units 7 of the multiple electric solar shading devices 5 installed on that floor. A commercial AC power supply 17 is supplied to the floor controller 1 and the shading material control units 7 via a distribution board 9. The shading material control unit 7 of each electric solar shading device 5 controls the operation of the solar shading material 11 based on command signals input from the central control device 3 or the operation switch 8.

[0015] The central control device 3 performs automatic solar radiation control for each electric solar shading device 5. Specifically, the central control device 3 outputs a command signal to the target electric solar shading device 5 based on a preset program. The program is set based on the location, direction, time, etc. of the electric solar shading device 5. Therefore, the frequency of input of command signals through automatic solar radiation control to electric solar shading devices 5 installed in locations where the device is not exposed to sunlight for long periods of time is reduced. Furthermore, the frequency of input of command signals through automatic solar radiation control to each electric solar shading device 5 is reduced during the time period from sunset to sunrise. Note that the automatic solar radiation control by the central control device 3 is not limited to that based on a preset program. For example, control may be based on a sensor signal from a solar radiation sensor or the results of sky image analysis, or a combination of these with a preset program.

[0016] (Configuration of the shielding material control unit 7) 2, the shading material control unit 7 includes a motor 10 that operates the solar radiation shading material 11, a relay 27, a power supply circuit 28, a microcomputer 31 as a motor control unit, and a capacitor 50 as a power storage member. The motor 10 is, for example, a DC motor. The motor 10 is provided inside the head box 6.

[0017] The microcomputer 31 controls the operation of the motor 10 based on a command signal output from the command source 12. In FIG. 2, the command source 12 is the central control device 3 or the operation switch 8. The solar shading material 11 is raised and lowered or its angle is adjusted by the operation of the motor 10.

[0018] The power supply circuit 28 supplies DC power to the motor 10, the microcomputer 31, and the capacitor 50 based on the supply of the commercial AC power supply 17. More specifically, the commercial AC power supply 17 is supplied to the power supply circuit 28 via the connector 26 and the relay 27. The power supply circuit 28 converts the commercial AC power supply 17 into DC power of a required voltage. The power supply circuit 28 then supplies DC power to the microcomputer 31, the motor drive circuit 32, and the capacitor 50. The motor drive circuit 32 controls the operation of the motor 10 based on a motor control signal output from the microcomputer 31.

[0019] The relay 27 is, for example, a contactless relay. A contactless relay is also called a solid-state relay (SSR). The relay 27 is connected to a power supply circuit 28. The relay 27 is not limited to a contactless relay, and may be, for example, a contact relay (mechanical relay).

[0020] The microcomputer 31 is configured to be able to control the relay 27. Under the control of the microcomputer 31, the relay 27 is placed in either a conductive state, which allows the supply of commercial AC power 17 to the power supply circuit 28, or a non-conductive state, which cuts off the supply of commercial AC power 17 to the power supply circuit 28. More specifically, the relay 27 is placed in a conductive state when a control signal PS is input from the microcomputer 31, and is placed in a non-conductive state, which operates as a normally open contact, which opens the contacts, when the control signal PS is not input. That is, when the control signal PS is input, the relay 27 supplies the commercial AC power 17 supplied to the connector 26 to the power supply circuit 28, and when the control signal PS is not input, the relay 27 cuts off the supply of commercial AC power 17 to the power supply circuit 28. The relay 27 has a known function of starting the supply of AC power to the power supply circuit 28 at the zero-cross point of the AC power, i.e., the timing when the AC power voltage becomes an intermediate voltage.

[0021] Capacitor 50 is connected to microcomputer 31. Capacitor 50 has the capacitance required to operate microcomputer 31. The operating voltage of microcomputer 31 is, for example, 5 V or less. Capacitor 50 is charged by DC power supplied from power supply circuit 28. When relay 27 is in a non-conductive state, i.e., when the supply of commercial AC power 17 to power supply circuit 28 is cut off, capacitor 50 supplies the power stored in itself to microcomputer 31.

[0022] A command signal supplied from the command source 12 to a communication port 34 of the shading material control unit 7 is input to a microcomputer 31 via a communication interface 35. A ROM 36, a RAM 37, and an EEPROM 38 are connected to the microcomputer 31. The microcomputer 31 operates based on a program stored in the ROM 36. The RAM 37 temporarily stores the processing results of the microcomputer 31. The EEPROM 38 stores current data such as the position and angle of the solar shading material 11 in the motorized solar shading device 5.

[0023] A status display LED 39 connected to the microcomputer 31 displays the operation mode of the electric solar shading device 5, i.e., whether it is in normal mode or energy-saving mode. A dip switch 40 connected to the microcomputer 31 allows the address information of the electric solar shading device 5 to be set.

[0024] (Specific Configuration of Power Supply Circuit 28) 3 shows a specific configuration of the power supply circuit 28 of the shielding material control unit 7. The power supply circuit 28 includes a high-power transformer 41 that supplies operating current to the motor drive circuit 32, and a low-power transformer 42 that supplies operating current to the microcomputer 31, etc. The commercial AC power supply 17 is supplied to the primary coils of the high-power transformer 41 and the low-power transformer 42 via a relay 27.

[0025] The capacitor 50 is connected in parallel with the microcomputer 31. More specifically, the negative terminal of the capacitor 50 is connected to the ground, and the positive terminal of the capacitor 50 is connected to the stabilizing circuit 46 and the microcomputer 31.

[0026] When a control signal PS is input from microcomputer 31, relay 27 supplies commercial AC power supply 17 to the primary coils of high-power transformer 41 and low-power transformer 42. When no control signal PS is input, relay 27 cuts off the supply of commercial AC power supply 17 to the primary coils of high-power transformer 41 and low-power transformer 42. Therefore, when no control signal PS is input to relay 27, no power is consumed by high-power transformer 41 and low-power transformer 42.

[0027] The high-power transformer 41 steps down the commercial AC power supply 17 to a required voltage and outputs it. The AC output voltage of the high-power transformer 41 is then converted to a DC voltage by a rectifier circuit 43 and a stabilization circuit 44 and supplied to the motor drive circuit 32.

[0028] The small-power transformer 42 steps down the commercial AC power supply 17 to a required voltage and outputs it. The AC output voltage of the small-power transformer 42 is then converted to a DC voltage by a rectifier circuit 45 and a stabilization circuit 46 and supplied to a capacitor 50 and a microcomputer 31.

[0029] (Operation of the shielding material control unit 7) The shading material control unit 7 of each electric shading device 5 controls the shading material 11 in either normal mode or energy-saving mode based on a command signal output from the command source 12. The command source 12 selectively outputs a command signal to one of the electric shading devices 5 to be controlled, or outputs a command signal to the plurality of electric shading devices 5 collectively.

[0030] In the normal mode, a control signal PS is input to the relay 27, and the commercial AC power supply 17 is supplied to the primary coils of the high-power transformer 41 and the low-power transformer 42. Then, the motor drive circuit 32 operates based on a command signal output from the command source 12, and the solar shading material 11 is raised and lowered or its angle adjusted. When the motor drive circuit 32 operates to drive the motor 10, power is also supplied from the power supply circuit 28 to the capacitor 50, and the capacitor 50 is charged.

[0031] As shown in FIG. 4, in the normal mode, the microcomputer 31 monitors whether or not a command signal has been received from the command source 12 (step S1). Next, in step S2, the microcomputer 31 determines whether a condition for transitioning to the energy saving mode is met. For example, the condition for transitioning to the energy saving mode may be that a time during which no command signal is input from the command source 12 reaches a predetermined time. The predetermined time may be set to, for example, a time between several tens of seconds and several minutes.

[0032] If the conditions for switching to the energy saving mode are not met in step S2, the process returns to step S1. If the conditions for switching to the energy saving mode are met in step S2, the process moves to step S3.

[0033] In step S3, the microcomputer 31 scans current data such as the position and angle of the solar radiation shading material 11 and stores the scan results in the EEPROM 38. In step S3, if the solar radiation shading material 11 is in operation, the microcomputer 31 scans the current data after the operation is stopped.

[0034] In the next step S4, the microcomputer 31 stops outputting the control signal PS to the relay 27. This causes the relay 27 to enter a non-conductive state, and the supply of the commercial AC power supply 17 to the primary coils of the high-power transformer 41 and the low-power transformer 42 is cut off.

[0035] In the next step S5, the microcomputer 31 transmits the current data scanned in step S3 to the central control device 3 via the floor controller 1, and ends the process of transitioning to the energy saving mode. In the energy saving mode, the microcomputer 31 operates using power supplied from the capacitor 50.

[0036] FIG. 5 shows the operation of the microcomputer 31 in the energy saving mode and when switching from the energy saving mode to the normal mode. As shown in the figure, in step S11, the microcomputer 31 monitors whether or not a command signal has been received from the command source 12. When a command signal is input from the command source 12 to the shielding material control unit 7 in this state, if the command signal is a signal instructing a data scan (steps S12 and S13), the microcomputer 31 reads out the current data stored in the EEPROM 38 (step S14). Then, in step S15, the microcomputer 31 transmits the current data to the central control device 3 via the floor controller 1.

[0037] When a signal instructing cancellation of the energy saving mode is input in step S12, the microcomputer 31 proceeds to step S16 and determines whether or not the command signal also includes an operation command signal for the solar radiation shading material 11.

[0038] If an operation command signal is included, the microcomputer 31 temporarily stores the operation command signal in the RAM 37 (step S17). Next, the process proceeds to step S18, where the microcomputer 31 controls the relay 27 to be in a conductive state. That is, the microcomputer 31 inputs a control signal PS to the relay 27. As a result, the relay 27 is in a conductive state, and the commercial AC power supply 17 is supplied to the primary coils of the high-power transformer 41 and the low-power transformer 42. As a result, the normal mode is entered in which power is supplied to the motor drive circuit 32, the microcomputer 31, and the capacitor 50.

[0039] In the next step S19, the microcomputer 31 drives the solar radiation shading material 11 based on the operation command signal stored in the RAM 37 in step S17. At this time, power is supplied from the power supply circuit 28 to the motor drive circuit 32 to drive the motor 10, and at the same time, power is also supplied from the power supply circuit 28 to the capacitor 50 to charge the capacitor 50.

[0040] Furthermore, when the control operation of the solar radiation shading material 11 is completed, the microcomputer 31 stores the current data of the solar radiation shading material 11 in the EEPROM 38. Thereafter, the process proceeds to step S15, where the microcomputer 31 transmits the current data to the central control device 3 via the floor controller 1.

[0041] In step S16, if the command signal does not include an operation command signal for the solar radiation shading material 11, the process proceeds to step S18, but the process of step S19 is not performed. In the shading material control unit 7 of each motorized solar shading device 5, the microcomputer 31 monitors the voltage of the capacitor 50. In the energy saving mode, when the voltage of the capacitor 50 falls below a preset specified value, the microcomputer 31 outputs a control signal PS to the relay 27. This causes the relay 27 to enter a conductive state, and power is supplied from the power supply circuit 28 to the microcomputer 31 and the capacitor 50. As a result, the capacitor 50 is charged so that the voltage becomes equal to or higher than the specified value.

[0042] The effects of this embodiment will be described. (1) When the relay 27 is in a non-conductive state, the power supply from the commercial AC power supply 17 to the power supply circuit 28 is cut off, thereby making it possible to reduce power consumption in the power supply circuit 28. When the relay 27 is in a non-conductive state, the capacitor 50 supplies the power stored in itself to the microcomputer 31. This makes it possible to operate the microcomputer 31 using the power of the capacitor 50, even while the power supply from the commercial AC power supply 17 to the power supply circuit 28 is cut off. Furthermore, the microcomputer 31 switches the relay 27, which is in a non-conductive state, to a conductive state based on a signal output from the command source 12. As a result, when the solar radiation shading material 11 is operated based on a command signal from the command source 12, the relay 27 is switched to a conductive state, making it possible to supply power to the motor 10.

[0043] Furthermore, the electric sun shading system S of this embodiment includes a plurality of electric sun shading devices 5, each having a sun shading material 11 and a shading material control unit 7. As a result, the greater the number of electric sun shading devices 5 included in the electric sun shading system S, the more significant the energy saving effect can be obtained.

[0044] As a comparative configuration different from the above embodiment, consider a configuration in which a power supply controller is provided separately from each electric solar shading device 5. In this comparative configuration, the power supply controller is connected to each electric solar shading device 5, and the power supply controller controls the relay 27 of each electric solar shading device 5 based on a command signal from the command source 12. Compared to this comparative configuration, the above embodiment does not require the power supply controller and the power lines connecting the power supply controller to each electric solar shading device 5, and it is also possible to eliminate the work of connecting the power lines to each electric solar shading device 5.

[0045] (2) When a predetermined time has elapsed without a command signal being input from the command source 12, the microcomputer 31 switches the relay 27 from a conductive state to a non-conductive state. This makes it possible to keep the relay 27 in a non-conductive state for a long period of time, for example, when the frequency of input of command signals from the central control device 3 due to automatic solar radiation control is low, such as at night, thereby reducing power consumption in the power supply circuit 28.

[0046] (3) When relay 27 is in a conductive state, capacitor 50 stores the power supplied from power supply circuit 28. This makes it possible to maintain the voltage of capacitor 50. (4) When the motor 10 is driven by power supplied from the power supply circuit 28, power is also supplied to the capacitor 50 from the power supply circuit 28. This makes it possible to maintain the voltage of the capacitor 50 at a suitable level.

[0047] (5) When the voltage of capacitor 50 falls below a preset value, microcomputer 31 turns relay 27 on, enabling power supply from power supply circuit 28 to capacitor 50. This allows capacitor 50 to be charged, for example, when the non-conductive state of relay 27 continues for a long time and the voltage of capacitor 50 starts to drop.

[0048] This embodiment can be modified as follows: This embodiment and the following modifications can be combined and implemented within the scope of technical compatibility. In the shielding material control unit 7 of the above embodiment, the capacitor 50 is used as the electricity storage member connected to the microcomputer 31, but this is not limited thereto, and for example, an electric double layer capacitor or a lithium ion battery may be used as the electricity storage member.

[0049] The operation of the shielding material control unit 7 in the above embodiment is an example and can be changed as appropriate. In the above embodiment, the microcomputer 31 may be configured to change the relay 27 from a non-conductive state to a conductive state based on the input of the operation command signal to the shading material control unit 7. In this case, the operation command signal may be output multiple times by pressing the operation switch 8 once. This makes it possible to reliably operate the solar radiation shading material 11 based on the operation command signal.

[0050] Furthermore, when the central control device 3 outputs the operation command signal, a preliminary signal may be output before the operation command signal, and the microcomputer 31 may turn on the relay 27 based on the input of the preliminary signal. This also makes it possible to reliably operate the solar radiation shading material 11 based on the operation command signal.

[0051] In the above embodiment, the relay 27 may be configured to be conductive when the control signal PS is not input, and to be non-conductive when the control signal PS is input. In the above embodiment, the motor 10 may be an AC motor.

[0052] In the above embodiment, the central control device 3 or the floor controller 1 may be configured to monitor the voltage of the capacitor 50 in each motor-driven solar shading device 5. The electric shading system S of the above embodiment includes a plurality of electric shading devices 5, but is not limited to this and may be applied to an electric shading system including only one electric shading device 5.

[0053] In the above embodiment, the power supply connected to the power supply circuit 28 via the relay 27 is the commercial AC power supply 17, but this is not particularly limited. For example, the power supply connected to the power supply circuit 28 via the relay 27 may be a solar cell or a battery that stores power generated by the solar cell.

[0054] In the above embodiment, the command source 12 is the central control device 3 or the operation switch 8, but this is not limiting. For example, the command source 12 may include an external interlocking unit, which will be described later. For example, the electric solar shading system S may be configured to include an external interlocking unit that receives signals (such as emergency signals) from other devices. The signals from the other devices may be, for example, serial signals such as RS485 or RS232C signals, or contact signals. The external interlocking unit outputs command signals to the shading material control units 7 of the electric solar shading devices 5 based on the signals from the other devices.

[0055] In the above embodiment, an electricity storage member connected to the power supply circuit 28 and the motor drive circuit 32 may be provided separately from the capacitor 50. For example, the electricity storage member is connected to the stabilization circuit 44, which is connected to the high-power transformer 41 in the power supply circuit 28, and to the motor drive circuit 32. The electricity storage member supplies power to the motor drive circuit 32 when the relay 27 is in a non-conductive state. In other words, the motor 10 is driven by the power of the electricity storage member when the relay 27 is in a non-conductive state. The electricity storage member is capable of storing the power required to drive the motor 10, and may be, for example, an electric double layer capacitor or a lithium ion battery.

[0056] With this configuration, even when relay 27 is not conductive and power supply to power supply circuit 28 is cut off, motor 10 can be driven by the power stored in the power storage member. This makes it possible to further reduce power consumption in power supply circuit 28.

[0057] Furthermore, when the relay 27 is in a non-conductive state, power may be supplied to both the microcomputer 31 and the motor drive circuit 32 from a single power storage member. The configuration of the electric solar shading device 5 of the above embodiment may be used in electric vertical blinds, electric shades, electric roller blinds, electric curtains, electric awnings, etc.

[0058] The embodiments and modifications disclosed herein are illustrative in all respects, and the present invention is not limited to these examples. That is, the scope of the present invention is defined by the claims, and it is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0059] S...Motorized solar shading system 5...Motorized sunshade 7...Shielding material control section 10...Motor 11...Sunshading material 12…Director 17…Commercial AC power supply (power supply) 27...Relay 28…Power circuit 31...Microcomputer (motor control unit) 50...Capacitor (electricity storage material)

Claims

1. A solar radiation shielding material; a shading material control unit that controls the operation of the solar shading material based on a command signal output from a command source, The shielding material control unit a motor for operating the solar radiation shielding material; a motor control unit that controls the operation of the motor; an electricity storage member connected to the motor control unit; a power supply circuit that supplies power to the motor, the motor control unit, and the electricity storage member based on the supply of power; a relay connected to the power supply circuit, the relay is placed in either a conductive state in which the power can be supplied to the power supply circuit or a non-conductive state in which the power supply to the power supply circuit is cut off; the electricity storage member supplies the electric power stored therein to the motor control unit when the relay is in the non-conductive state; the motor control unit is capable of controlling the relay, and changes the relay from the non-conductive state to the conductive state based on a signal output from the command source. Electric sunshade device.

2. When a time during which no command signal is input from the command source to the shielding material control unit reaches a predetermined specified time, the motor control unit changes the relay from the conductive state to the non-conductive state. The motorized solar shading device according to claim 1.

3. the electricity storage member stores the power supplied from the power supply circuit when the relay is in the conductive state; The electric solar shading device according to claim 1 or 2.

4. When the motor is driven by power supplied from the power supply circuit, power is also supplied from the power supply circuit to the electricity storage member. The motorized solar shading device according to claim 3.

5. the motor control unit, when the voltage of the electricity storage member falls below a predetermined specified value, brings the relay into the conductive state to enable power supply from the power supply circuit to the electricity storage member; The electric solar shading device according to claim 3 or 4.

6. a plurality of electric solar shading devices each including a solar shading material and a shading material control unit that controls the operation of the solar shading material based on a command signal; a command source that outputs the command signal; An electric solar shading system comprising: The shading material control unit of each of the electric solar shading devices is a motor for operating the solar radiation shielding material; a motor control unit that controls the operation of the motor; an electricity storage member connected to the motor control unit; a power supply circuit that supplies power to the motor, the motor control unit, and the electricity storage member based on the supply of power; a relay connected to the power supply circuit, the relay is placed in either a conductive state in which the power can be supplied to the power supply circuit or a non-conductive state in which the power supply to the power supply circuit is cut off; the electricity storage member supplies the electric power stored therein to the motor control unit when the relay is in the non-conductive state; the motor control unit is capable of controlling the relay, and changes the relay from the non-conductive state to the conductive state based on a signal output from the command source. Motorized solar shading system.

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