DC Wiring System

Abstract

To provide a DC wiring system and an output device provided in the same to reduce possibility of unstable operation in a DC device.SOLUTION: A DC wiring system comprises a DC power supply and an output device 20 connected to the DC power supply through a DC supply line R1. The output device 20 includes a power supply connection unit 21 to which the DC supply line R1 is connected and a load connection unit 22 to which the DC device operating by receiving a DC voltage supply is directly or indirectly connected. The output device 20 outputs a DC voltage from the load connection unit 22 when the voltage input to the power supply connection unit 21 satisfies a voltage condition where the DC device can operate.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] This disclosure relates to a DC wiring system. To More particularly, the present disclosure relates to a DC wiring system for distributing DC power. To Regarding. [Background technology]

[0002] Patent Document 1 discloses a multifunctional power connection device equipped with a high-voltage AC terminal and a low-voltage DC terminal (see, for example, Patent Document 1). This multifunctional power connection device is attached to a ceiling hook using the high-voltage AC terminal. The multifunctional power connection device has a built-in AC-DC conversion circuit, and converts AC current supplied from the high-voltage AC terminal into DC current and outputs it to the low-voltage DC terminal. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Utility Model Registration No. 3214762 Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-mentioned multifunctional power supply connection device, the AC-DC conversion circuit converts the AC current supplied from the high-voltage AC terminal into a DC current and outputs it to the low-voltage DC terminal, but there is a possibility that a voltage that is not suitable for the device (DC device) connected to the low-voltage DC terminal may be output, which may cause the operation of the load connected to the multifunctional power supply connection device to become unstable.

[0005] The object of the present disclosure is to provide a DC wiring system that reduces the possibility of unstable operation of DC equipment. M The purpose is to provide. [Means for solving the problem]

[0006] A DC wiring system according to one aspect of the present disclosure includes a DC power source, an output device connected to the DC power source via a DC supply line, A DC device that operates by receiving a DC voltage; The output device includes a power supply connection section and a load connection section. The power supply connection section is connected to the DC supply line. The load connection section includes: The above DC equipment is directly or indirectly connected . before When the voltage input to the power supply connection section satisfies a voltage condition for operating the DC device, the output device outputs a DC voltage from the load connection section. The output device is embedded in a wall using a mounting frame with its rear portion inserted into a mounting hole provided in the wall, and the DC device is attached to the front surface of the output device. The DC device has a mechanical connection part for mechanically attaching it to the output device and an electrical connection part for electrically connecting it to the load connection part, and operates by receiving a DC voltage from the load connection part via the electrical connection part. A DC wiring system according to an embodiment of the present disclosure includes a DC power source, an output device connected to the DC power source via a DC supply line, and an adapter device. The output device includes a power supply connection section to which the DC supply line is connected, and a load connection section to which a DC device that operates by receiving a DC voltage is directly or indirectly connected. When a voltage input to the power supply connection section satisfies a voltage condition that allows the DC device to operate, the output device outputs a DC voltage from the load connection section. The adapter device includes a first connection section electrically connected to the load connection section of the output device, and a plurality of second connection sections to which the DC devices can be connected, and distributes the DC voltage input from the first connection section and outputs it to the second connection section. A DC wiring system according to one aspect of the present disclosure includes a DC power source, an output device connected to the DC power source via a DC supply line, and a DC device that operates by receiving a supply of DC voltage. The output device includes a power supply connection section to which the DC supply line is connected, and a load connection section to which the DC device is directly or indirectly connected. When a voltage input to the power supply connection section satisfies a voltage condition that allows the DC device to operate, the output device outputs a DC voltage from the load connection section. The DC device has a mechanical connection section for mechanically attaching it to the output device and an electrical connection section for electrically connecting it to the load connection section, and the DC device operates by receiving a supply of DC voltage from the load connection section via the electrical connection section. A DC wiring system according to an embodiment of the present disclosure includes a DC power source, an output device connected to the DC power source via a DC supply line, and an adapter device. The output device includes a power source connection section and a load connection section. The DC supply line is connected to the power source connection section. A DC device is directly or indirectly connected to the load connection section. The DC device operates by receiving a DC voltage. When a voltage input to the power source connection section satisfies a voltage condition under which the DC device can operate, the output device outputs a DC voltage from the load connection section. The output device is embedded in a wall with a mounting frame, with a rear portion inserted into a mounting hole provided in the wall, and the DC device is attached to a front surface of the output device. The adapter device includes a first connection section electrically connected to the load connection section of the output device and a plurality of second connection sections to which the DC devices can be connected, and distributes the DC voltage input from the first connection section and outputs it to the second connection section. Effect of the Invention

[0008] According to the present disclosure, there is provided a DC wiring system that reduces the possibility of unstable operation of DC equipment. M can be provided. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a schematic system configuration diagram of a wiring system in a facility including a DC wiring system according to an embodiment of the present disclosure. [Diagram 2] FIG. 2 is a schematic block diagram of an output device used in the above DC wiring system. [Diagram 3] FIG. 3 is a schematic perspective view showing a state before a DC device, which is a USB outlet, is connected to the output device. [Figure 4] FIG. 4 is a schematic perspective view showing a state before a DC device serving as an access point of a wireless LAN is connected to the output device. [Diagram 5] FIG. 5 is a system configuration diagram in which backup power is supplied to the DC supply line in the above wiring system. [Figure 6] FIG. 6 is a system configuration diagram in which backup power is supplied to the DC supply line in the above wiring system. [Figure 7] FIG. 7 is a schematic perspective view showing a state before a DC device, which is a USB outlet, is connected to an output device used in the DC wiring system of the first modified example. [Figure 8] FIG. 8 is a schematic perspective view illustrating a method of removing a DC device, which is a USB outlet, from the output device. [Figure 9] FIG. 9 is a schematic block diagram of an adapter device used in a DC wiring system of the second modification. [Figure 10] FIG. 10 is a perspective view of the output device to which the adapter device is attached. [Figure 11]FIG. 11 is a schematic block diagram of an output device according to a third modification of an embodiment of the present disclosure. [Figure 12] FIG. 12 is a schematic block diagram of an output device according to a fourth modified example of an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] (Embodiment) (1) Overview Each drawing described in the following embodiments is a schematic drawing, and the size and thickness ratios of each component in each drawing do not necessarily reflect the actual dimensional ratios.

[0011] The DC wiring system 1 of the following embodiment is assumed to be applied to a residential facility F1 such as a detached house, as shown in Fig. 1. The DC wiring system 1 may be applied to a residential facility other than a detached house, such as an apartment building, or may be applied to a non-residential facility such as an office building, a tenant building, a factory, or an educational facility.

[0012] The DC wiring system 1 includes a DC power supply 10 and an output device 20 connected to the DC power supply 10 via a DC supply line R1. As shown in Fig. 2, the output device 20 includes a power supply connection unit 21 and a load connection unit 22. The DC supply line R1 is connected to the power supply connection unit 21. DC devices E1 to E6 that operate by receiving a DC voltage are directly or indirectly connected to the load connection unit 22. The output device 20 outputs a DC voltage from the load connection unit 22 when the voltage input to the power supply connection unit 21 satisfies a voltage condition that allows the DC devices E1 to E6 to operate.

[0013] In other words, the output device 20 includes a power supply connection unit 21 and a load connection unit 22. A DC supply line R1 for supplying DC power is connected to the power supply connection unit 21. DC devices E1 to E6 that operate by receiving a DC voltage are directly or indirectly connected to the load connection unit 22. The output device 20 outputs a DC voltage from the load connection unit 22 when a voltage input to the power supply connection unit 21 satisfies a voltage condition that allows the DC devices E1 to E6 to operate.

[0014] Here, the voltage condition under which the DC devices E1 to E6 can operate may include at least one of a first condition related to the voltage value of the voltage input to the power supply connection unit 21 and a second condition related to the polarity of the voltage input to the power supply connection unit 21. The first condition may include a condition as to whether or not the voltage value of the voltage input to the power supply connection unit 21 is within a voltage range under which the DC devices E1 to E6 can operate normally. The second condition may include a condition as to whether or not the polarity of the voltage input to the power supply connection unit 21 matches the polarity of the voltage under which the DC devices E1 to E6 can operate normally. Note that in the present embodiment, a case will be described as an example in which the voltage condition under which the DC devices E1 to E6 can operate includes both the first condition and the second condition.

[0015] As described above, the output device 20 outputs a DC voltage from the load connection section 22 when the voltage input to the power supply connection section 21 satisfies the voltage condition, and does not output a DC voltage from the load connection section 22 when the voltage input to the power supply connection section 21 does not satisfy the voltage condition. For example, when a DC voltage that does not satisfy the voltage condition is input to the power supply connection section 21 due to incorrect wiring or the like, the output device 20 can prevent the load connection section 22 from outputting a DC voltage. Therefore, it is possible to reduce the possibility that the output device 20 outputs a voltage that does not allow the DC devices E1 to E6 to operate to the DC devices E1 to E6 connected to the load connection section 22. Therefore, it is possible to provide a DC wiring system 1 and an output device 20 that reduce the possibility that the operation of the DC devices E1 to E6 becomes unstable.

[0016] (2) Details Hereinafter, the DC wiring system 1 according to this embodiment and the output device 20 included in the DC wiring system 1 will be described in detail with reference to the drawings.

[0017] (2.1) Structure FIG. 1 is a schematic system configuration diagram of a wiring system 3 in a facility F1, which includes a DC wiring system 1 of the present embodiment.

[0018] The wiring system 3 includes the above-mentioned DC wiring system 1 that supplies DC power to DC devices E1 to E6 used in the facility F1, and an AC wiring system 2 that supplies AC power to an AC device (AC device) A1 used in the facility F1.

[0019] (2.1.1) AC Wiring System The AC wiring system 2 includes a distribution board 201 to which AC power is supplied from an AC power source P1, such as a commercial AC power source outside the facility F1. The distribution board 201 is installed inside the facility F1. The distribution board 201 houses a plurality of branch breakers 202. An AC device A1 that operates by receiving AC power can be connected to each of the plurality of branch breakers 202 via an AC supply line R2. That is, each of the plurality of branch breakers 202 can supply AC power supplied from the AC power source P1 to the AC device A1 connected to the branch breaker 202. For example, a VVF (Vinyl insulated Vinyl sheathed Flat-type cable) cable for indoor wiring is used for the AC supply line R2.

[0020] (2.1.2) DC Wiring System As described above, the DC wiring system 1 includes the DC power supply 10 and the output device 20 connected to the DC power supply 10 via the DC supply line R1.

[0021] (2.1.3) DC power supply The DC power supply 10 is housed in a distribution board 201 together with the above-mentioned multiple branch breakers 202, for example. The DC power supply 10 has an insulated AC / DC converter (indicated as AC / DC in FIG. 1) 101 that converts AC power to DC power. The AC / DC converter 101 converts the AC power supplied through the branch breaker 202 into a low-voltage DC voltage (for example, DC 28 V) and outputs it to a DC supply line R1. For example, the same VVF cable as the AC supply line R2 is used for the DC supply line R1. The low-voltage DC voltage is, for example, a DC voltage corresponding to a low-power circuit and has a maximum operating voltage of 60 V or less, so that a general user can attach and detach the DC device E1 to the output device 20. Note that in this embodiment, the low-voltage DC voltage is DC 28 V, but it may be any DC voltage with a maximum operating voltage of 60 V or less, and may be DC 12 V or DC 48 V. Since the input and output of the AC / DC converter 101 are electrically insulated, the possibility of leakage current occurring in the DC supply line R1 can be reduced, and the safety of the DC supply line R1 can be improved.

[0022] Therefore, in the facility F1 to which the AC wiring system 2 is applied, the DC power source 10 is installed in the distribution board 201, and the VVF cable wired as the AC supply line R2 in the facility F1 is reconnected to the output side of the DC power source 10, so that the DC voltage can be supplied by the existing VVF cable. Since the DC supply line R1 is a low-voltage wiring, a signal cable such as a CPEV cable may be used for the DC supply line R1, or a mixture of VVF cables and signal cables such as a CPEV cable may be used. In the example of FIG. 1, the DC power source 10 is arranged inside the AC distribution board 201, but the DC power source 10 may be arranged outside the distribution board 201. The DC power source 10 may be arranged inside a DC board provided separately from the AC distribution board 201.

[0023] The DC power supply 10 may include a protection circuit such as an overcurrent protection circuit or a short circuit protection circuit at the output stage of the AC / DC converter 101. A DC circuit breaker having a function of breaking the circuit when an overcurrent, a short circuit, or the like occurs may be provided between the DC power supply 10 and the output device 20.

[0024] (2.1.4) Output Device The DC supply line R1 is wired to the facility F1 where the DC devices E1 to E6 are used. The output device 20 is used in a state where it is fixed to a fixed position in the facility F1. The output device 20 is used in a state where it is fixed to a fixed position such as a wall (inner wall and outer wall), floor, or ceiling of a building constituting the facility F1. FIG. 3 shows a state before the output device 20 is fixed to a wall 400 which is a fixed position in the facility F1. In the illustrated example, the output device 20 is embedded in the wall 400 by inserting the rear part into a mounting hole 401 provided in the wall 400 using a mounting frame 30. The output device 20 is attached to the wall 400 with the front surface of the output device 20 exposed on the front side of the wall 400. In the following description, the up, down, left and right directions are defined when the output device 20 attached to the wall 400 is viewed from the front, and the front side of the wall 400 is the front side and the back side is the rear side. Note that these directions are merely examples, and are not intended to limit the directions in which the output device 20 may be used.

[0025] The mounting frame 30 is a series of mounting frames capable of mounting three embedded wiring devices of one module size side by side. That is, the output device 20 is formed in the same shape and size as an embedded wiring device of one module size. The mounting frame 30 is, for example, a synthetic resin molded product, but may also be a metal mounting frame, and the shape of the mounting frame 30 can be changed as appropriate. The output device 20 may be used in a state where it is fixed to a fixed position, such as a desk, a bookshelf, or other fixture or equipment arranged in the facility F1.

[0026] The output device 20 includes the above-mentioned power supply connection unit 21 and load connection unit 22. The output device 20 further includes a protection circuit 23 and a dropper power supply 24, as shown in Fig. 2. The protection circuit 23 cuts off the output of the DC voltage V1 from the load connection unit 22 when at least one of the voltage value and polarity of the DC voltage V1 input to the power supply connection unit 21 does not satisfy a voltage condition.

[0027] The power supply connection section 21 has a pair of connection terminals t11, t12 to which a pair of electric wires constituting the DC supply line R1 are respectively connected. The load connection section 22 has a pair of connection terminals t21, t22 electrically connected to the pair of connection terminals t11, t12. Here, a fuse 25 and a relay contact 231 are connected in series between the high-potential side connection terminal t11 and the connection terminal t21. The low-potential side connection terminal t12 and the connection terminal t22 are connected via internal wiring. In addition, a protection element 26 such as a varistor is connected between the pair of connection terminals t21, t22. It is not essential that the output device 20 has the fuse 25 and the protection element 26, and they can be omitted as appropriate.

[0028] A DC voltage is input to the dropper power supply 24 from a connection point PT1 between the fuse 25 and the relay contact 231 via a series circuit of diodes D1 and D2. The diodes D1 and D2 are connected in a direction such that a current flows from the connection point PT1 to the dropper power supply 24. The dropper power supply 24 supplies a drive voltage to an excitation circuit 236 that excites a coil of a relay having the relay contact 231. The dropper power supply 24 includes a step-down circuit such as a series regulator, and converts the DC voltage input from the DC power supply 10 into a DC voltage of a predetermined voltage value (for example, DC 16 V) and supplies it to the excitation circuit 236.

[0029] The protection circuit 23 includes the above-mentioned relay contact 231 and excitation circuit 236 , a voltage detection circuit 232 , a zero-cross detection circuit (ZC) 233 , a timer 234 , and an AND circuit 235 .

[0030] The voltage detection circuit 232 detects the voltage at the connection point PT2 of the diodes D1 and D2, and outputs an H-level signal when the voltage at the connection point PT2 exceeds a predetermined threshold voltage, and outputs an L-level signal when the voltage at the connection point PT2 is equal to or lower than the threshold voltage. Here, the threshold voltage is set to the lower limit (e.g., DC 3V) of the voltage range in which the DC devices E1 to E6 can operate.

[0031] The zero-cross detection circuit 233 compares the voltage at the connection point PT2 with a predetermined reference voltage (for example, 0 V) ​​and detects the zero-cross of the voltage applied to the connection terminal t11 when the voltage at the connection point PT2 changes from a state below the reference voltage to a state above the reference voltage. When the zero-cross detection circuit 233 detects the zero-cross, it outputs a zero-cross detection signal to the timer 234.

[0032] Timer 234 outputs an H-level signal when a state in which a zero-cross detection signal is not input from zero-cross detection circuit 233 continues for a predetermined determination time (e.g., a time longer than one cycle of the commercial AC power supply). Timer 234 outputs an L-level signal when the duration of the state in which a zero-cross detection signal is not input from zero-cross detection circuit 233 is shorter than the determination time. In other words, timer 234 outputs an H-level signal when a state in which a zero-cross detection signal is not input from zero-cross detection circuit 233 continues for the determination time or longer.

[0033] The output signals of the voltage detection circuit 232 and the timer 234 are input to the AND circuit 235. If the output signal of at least one of the voltage detection circuit 232 and the timer 234 is at an L level, the AND circuit 235 outputs an L level signal to the excitation circuit 236. If the output signals of the voltage detection circuit 232 and the timer 234 are both at an H level, that is, if the voltage of the connection point PT2 is equal to or higher than the reference voltage and the state in which a zero cross cannot be detected continues for equal to or longer than the determination time, the AND circuit 235 outputs an H level signal to the excitation circuit 236.

[0034] When an L level signal is input from the AND circuit 235, the excitation circuit 236 does not pass an excitation current through the relay coil, opens the relay contact 231, and no DC voltage is output from the load connection unit 22. When an H level signal is input from the AND circuit 235, the excitation circuit 236 passes an excitation current through the relay coil and closes the relay contact 231. As a result, when the voltage input to the power supply connection unit 21 satisfies the voltage conditions under which the DC devices E1 to E6 can operate, the output device 20 outputs a DC voltage from the load connection unit 22.

[0035] In addition, the output device 20 makes the power supply connection part 21 and the load connection part 22 conductive or non-conductive by turning the relay contact 231 on or off, but instead of the relay contact 231, a semiconductor switch that switches the power supply connection part 21 and the load connection part 22 between a conductive state or a non-conductive state may be provided.

[0036] A diode D3 is connected between the high potential side connection terminal t21 and the connection point PT2 of the diodes D1 and D2 in a direction that allows current to flow from the connection terminal t21 to the connection point PT2. This diode D3 is provided to enable the DC voltage supplied from the battery connected to the load connection part 22 to be output to the DC supply line R1 via the power supply connection part 21. When the DC voltage output from the DC power supply 10 is stopped and a battery is connected to the load connection part 22, the output voltage of the battery is input to the protection circuit 23 via the diode D3 and input to the dropper power supply 24 via the diodes D3 and D2. At this time, the dropper power supply 24 drops the output voltage of the battery to generate an excitation voltage for the relay coil. Also, if the output voltage of the battery satisfies the above voltage condition, the AND circuit 235 outputs an H level signal, and the excitation circuit 236 passes an excitation current through the relay coil to close the relay contact 231. As a result, the output voltage of the battery is output to the DC supply line R1 via the power supply connection unit 21, so that in the event of a failure of the DC power supply 10 or a power outage of the AC power supply P1, a DC voltage can be output from the battery connected to the load connection unit 22 to the DC supply line R1.

[0037] As shown in Fig. 3, the output device 20 has a rectangular parallelepiped body 27. The body 27 houses the components of the circuit shown in Fig. 2.

[0038] The housing 27 holds the power supply connection part 21 to which two electric wires, which are the DC supply line R1, are connected. The connection terminals t11, t12 of the power supply connection part 21 are, for example, connection terminals with a quick-connect terminal structure, and are housed inside the housing 27. A pair of electric wire insertion holes into which a pair of electric wires is respectively inserted are opened on the rear surface of the housing 27. The pair of electric wires inserted into the pair of electric wire insertion holes are electrically and mechanically connected to the connection terminals with the quick-connect terminal structure, respectively, so that the two electric wires, which are the DC supply line R1, can be connected to the pair of connection terminals t11, t12 of the power supply connection part 21.

[0039] A load connection section 22 for connecting DC devices E1 to E6 is provided on the front surface of the housing 27. The load connection section 22 has a fitting hole 221 having a rectangular shape in a plan view provided on the front surface of the housing 27. A pair of connection terminals t21, t22 each formed in a round pin shape is disposed inside the fitting hole 221.

[0040] (2.1.5) DC equipment Next, the DC devices E1 to E6 connected to the output device 20 will be described.

[0041] Various DC devices E1 to E6 can be connected to the output device 20. In other words, the DC devices E1 to E6 are directly attached to the output device 20. The DC wiring system 1 of this embodiment further includes the DC devices E1 to E6.

[0042] Of the DC devices E1 to E6, the DC devices E1 to E5 are used in a state of being fixed to the power output device 20. Therefore, the DC devices E1 to E5 have a mechanical connection portion for mechanically attaching them to the power output device 20 and an electrical connection portion for electrically connecting them to the load connection portion 22. In this embodiment, a connector portion 41 (see FIG. 3) provided on the DC devices E1 to E5 has the functions of the mechanical connection portion and the electrical connection portion. The DC devices E1 to E5 operate by receiving a supply of DC voltage from the load connection portion 22 via the electrical connection portion (connector portion 41).

[0043] Here, the connector unit 41 provided in the DC devices E1 to E5 will be described using the DC device E3 as an example. The DC device E3 has a rectangular parallelepiped device body 40 as shown in FIG. 3. The DC device E3 is a USB (Universal Serial Bus) outlet that supplies a DC voltage to a power supply target connected via a USB cable. The device body 40 of the DC device E3 is attached to the front of the output device 20. The device body 40 has a USB port 43 for power supply provided on the front side when attached to the front of the output device 20.

[0044] The connector unit 41 includes a square cylindrical tubular portion 42 that is inserted into the fitting hole 221 of the output device 20. A pair of connection terminals t21, t22 that are electrically connected to the connection terminals t11, t12 of the output device 20 are arranged inside the tubular portion 42. Here, when the tubular portion 42 is inserted into the fitting hole 221 of the output device 20, the fitting hole 221 and the tubular portion 42 are mechanically coupled, and the DC device E3 is mechanically attached to the output device 20. Also, when the tubular portion 42 is inserted into the fitting hole 221 of the output device 20, the connection terminals t21, t22 of the connector unit 41 are electrically connected to the connection terminals t11, t12 of the load connection portion 22. As a result, a DC voltage is supplied to the USB port 43 of the DC device E3, and DC power can be supplied to a power supply target connected to the USB port 43 via a USB cable.

[0045] As described above, in this embodiment, the connector unit 41 provides a mechanical connection unit for mechanically attaching the DC device E3 to the output device 20 and an electrical connection unit for electrically connecting the DC device E3 to the load connection unit 22. Thus, by inserting the connector unit 41 of the DC device E3 into the fitting hole 221 of the output device 20, the DC device E3 is attached to the front surface of the output device 20. In addition, the DC device E3 and the output device 20 are electrically connected, and a state in which a DC voltage can be supplied from the USB port 43 to the power supply target is achieved.

[0046] The DC device E3 is a USB outlet having one USB port 43 on the front of the device body 40, but the number of USB ports 43 can be changed as appropriate. For example, the DC device E3A (see FIG. 1) is a USB outlet having two USB ports 43 on the front of the device body. The DC devices E3 and E3A are power supply devices that supply power to a power supply target electric device connected to the USB port 43 via a USB cable.

[0047] Incidentally, the DC device connected to the output device 20 is not limited to a USB outlet.

[0048] The DC device E1 (see Figs. 1 and 4) is an access point for a wireless LAN. The DC device E1 has a connector section 41 on the rear surface of the device body 40A, similar to that of the DC device E3. The device body 40A of the DC device E1 houses a connection terminal having a quick-connect terminal structure to which a signal line R3 from a HUB 61 arranged in the facility F1 is connected. A hole for passing the signal line R3 is opened on the rear surface of the device body 40A. The signal line R3 inserted into the device body 40A through this hole is connected to the connection terminal having the quick-connect terminal structure. The HUB 61 is connected to an optical network unit (ONU) 60 connected to an external network such as the Internet.

[0049] A communication circuit for wireless communication with a terminal device having a wireless communication function is housed inside the device main body 40A. The communication circuit is, for example, a communication circuit for wireless communication using a communication method conforming to the WiFi (registered trademark) standard, but may also be a communication circuit conforming to communication standards such as Bluetooth (registered trademark), ZigBee (registered trademark), and low-power radio.

[0050] The terminal device can connect to a communication network provided in the facility F1 by wirelessly communicating with the DC device E1, which is an access point, and is connected to an external network such as the Internet via the communication network within the facility F1. A modular jack 46 to which a LAN cable is connected is provided on the front surface of the DC device E1, and a terminal device connected to the modular jack 46 via a LAN cable can also be connected to the communication network within the facility F1.

[0051] The DC device E2 (see FIG. 1) is, for example, a lighting device that uses an LED (Light Emitting Diode) as a light source. The DC device E2 receives DC power from the output device 20 and performs illumination by turning on the LED, which is the light source.

[0052] The DC device E4 (see FIG. 1) is a sensor device having a sensor for detecting air quality, for example. The DC device E4 includes a sensor for detecting air quality, a communication circuit for power line carrier communication that communicates with other DC devices by superimposing a communication signal on the DC voltage applied to the DC supply line R1, and a power supply circuit that supplies an operating voltage to the sensor and the communication circuit. The DC device E4 operates by receiving DC power from the output device 20, the sensor periodically detects the air quality, and the communication circuit transmits the sensor detection result to other devices (for example, the DC power source 10 or other DC devices) at a predetermined transmission interval. When the communication circuit receives a transmission request from another device, it may transmit the sensor detection result to the device that made the request. In other words, the DC device E4 is a communication device that superimposes a communication signal on the DC supply line R1, and can communicate by using the DC supply line R1 as a communication line. The DC device E4, which is a sensor device, is not limited to having a sensor that detects air quality, and may have a sensor that detects temperature, humidity, water leakage, gas leakage, fire, or people, etc. The DC device E4 may be an audio interface unit such as an AI speaker equipped with a speaker and a microphone.

[0053] In this embodiment, for example, the DC power supply 10 connected to the DC supply line R1 communicates with the DC device E4, which is a sensor device, to collect information from the DC device E4. Here, when the DC power supply 10 collects information from a plurality of DC devices E4, the DC power supply 10 and the plurality of DC devices E4 are connected via the wired DC supply line R1, so that the plurality of DC devices E4 can be connected to the DC power supply 10 in a plug-and-play manner. The plurality of DC devices E4 are configured to perform a process of registering the DC power supply 10 when receiving a trigger signal superimposed on the DC supply line R1. For example, when a setting device connected to the DC supply line R1 transmits a trigger signal to the DC supply line R1 in response to a user's operation, the plurality of DC devices E4 that receive the trigger signal perform an operation of registering the DC power supply 10, so that the plurality of DC devices E4 can be registered collectively with the DC power supply 10.

[0054] The entity that collects information from the DC device E4, which is a sensor device, is not limited to the DC power source 10. Another communication device connected to the DC supply line R1 may collect information from the DC device E4.

[0055] In this embodiment, a low-voltage (e.g., DC28V) DC voltage is supplied to the DC device E4, which is a sensor device, via the DC supply line R1, and the power supply circuit of the DC device E4 converts the low-voltage DC voltage into a voltage value (e.g., DC5V) required for the sensor and the communication circuit. Since the power supply circuit converts, for example, a DC28V DC voltage into, for example, a DC5V DC voltage, it is possible to omit limited-life components such as aluminum electrolytic capacitors, and to achieve a smaller size and longer life of the power supply circuit, compared to the case where an AC voltage of AC100V is converted into a DC voltage of DC5V. By achieving a smaller size and a longer life of the sensor device, the freedom of the location where the sensor device can be installed is increased, and the DC device E4, which is a sensor device, can be installed in places where maintenance is difficult, such as above the ceiling, under the floor, and inside the wall. In addition, by connecting multiple sensor devices at a predetermined interval to the DC supply line R1 wired in the facility F1, a DC voltage can be supplied to multiple sensor devices arranged at a predetermined interval, and the multiple sensor devices can detect events to be detected. If an electric wire such as a flat cable is used as the DC supply line R1 connecting the DC power supply 10 and the DC device, this electric wire can be placed between the wall and the wallpaper. This makes it possible to lay out the electric wire connecting the DC device mounted on the wall and the DC power supply 10 in an inconspicuous manner.

[0056] The DC device E5 (see FIG. 1) is a power supply device having a non-contact power supply function that supplies power to a load device by a power supply method such as an electromagnetic induction method, a magnetic resonance method, or an electric field coupling method. The DC device E5 has a holder 47 that holds a load device such as a smartphone. The DC device E5 receives DC power from the output device 20 and performs non-contact power supply to an electric device to be supplied with power that is held in the holder 47.

[0057] Moreover, the DC device E6 (see FIG. 1) includes a device body 40B provided with a plurality of USB ports 43, and a plug 41A connected to the device body 40B via a cable 44. The plug 41A includes a cylindrical portion inserted into the fitting hole 221 of the output device 20, and a pair of connection terminals arranged inside the cylindrical portion. When the plug 41A is inserted into the fitting hole 221, the pair of connection terminals of the plug 41A are connected to the connection terminals t21, t22 of the output device 20, thereby supplying a DC voltage to the plurality of USB ports 43. Therefore, when a load device to be powered is connected to the USB port 43 of the DC device E6 via a USB cable, a DC voltage is supplied to the load device. In addition, since DC device E6 receives DC voltage from output device 20 by connecting plug 41A at the end of cable 44 to load connection portion 22 of output device 20, DC device E6 can be placed and used anywhere (floor, furniture such as a desk, or facility equipment) within the reach of cable 44.

[0058] Here, the DC devices E3, E3A, E5, and E6 are power supply devices that supply power to the power supply target. That is, the DC devices connected to the output device 20 include power supply devices that supply power to the power supply target, and the DC devices can supply power to the power supply target.

[0059] As described above, since the multiple DC devices E1 to E6 are detachable from the power output device 20, when the specifications of the power supply device or the communication device are changed, the change can be easily accommodated by replacing the DC devices.

[0060] (2.2) Operation Description (2.2.1) Normal operation The wiring system 3 of this embodiment includes a DC wiring system 1 that supplies DC power to a DC supply line R1 wired within a facility F1, and an AC wiring system 2 that supplies AC power to an AC supply line R2 wired within the facility F1.

[0061] In the AC wiring system 2, AC power is branched into a plurality of branch circuits by a plurality of branch breakers 202 housed in a distribution board 201, and is supplied to an AC device A1.

[0062] Moreover, the DC power source 10 of the DC wiring system 1 converts AC power supplied via the branch breaker 202 into DC power and supplies it to the output device 20 connected to the DC supply line R1. This makes it possible to supply DC power to the DC devices E1 to E6 connected to the output device 20.

[0063] (2.2.2) Backup operation Since the DC power supply 10 converts the AC power supplied from the AC power supply P1 into DC power and supplies it to the data output device 20, when a power outage occurs in the AC power supply P1, the power supply to the data output device 20 stops.

[0064] In this case, as shown in FIG. 5, for example, a battery 70 for an electric bicycle or electric motorcycle can be connected to the DC wiring system 1 to supply DC voltage to the DC supply line.

[0065] The DC power supply 10 has a DC / DC converter (written as DC / DC in FIG. 5) 102 that converts (steps up or steps down) the DC voltage supplied from the battery 70 via an electric wire into a low-voltage DC voltage and supplies it to a DC supply line R1.

[0066] When the battery 70 is connected to the DC power supply 10 via an electric wire during a power outage of the AC power supply P1, the DC / DC converter 102 converts the DC voltage input from the battery 70 into a low-voltage DC voltage and supplies it to the DC supply line R1. Therefore, even during a power outage of the AC power supply P1, the DC voltage can be supplied to the DC devices E1 to E6 to operate them. In addition, since the ONU 60 and the HUB 61 are also connected to the DC supply line R1, communication via the communication network within the facility F1 and the external communication network is possible even during a power outage of the AC power supply P1.

[0067] It is also possible to supply power from the battery 70 to the DC supply line R1 by connecting the battery 70 to the DC supply line R1. Specifically, when the plug 71 of the power supply line R4 connected to the battery 70 is connected to the load connection unit 22 of the output device 20, the DC voltage from the battery 70 is input to the protection circuit 23. At this time, since the DC voltage from the battery 70 satisfies the voltage condition, the protection circuit 23 turns on the relay contact 231, and the DC voltage from the battery 70 is supplied to the DC supply line R1. As a result, the DC voltage from the battery 70 is input to the other output devices 20, the ONU 60, and the HUB 61 via the DC supply line R1, so that the DC devices E1 to E6, the ONU 60, and the HUB 61 connected to the output device 20 can be operated.

[0068] When a charger for the battery 70 is connected to the DC supply line R1 or the output device 20, the charger may supply a DC voltage to the DC supply line R1 by discharging the battery. When the charger controls the discharge of the battery, the charger can control the voltage value of the DC voltage output to the DC supply line R1 to be constant even if the battery voltage drops due to the internal resistance of the battery, and the output capacity that can be discharged from the battery can be increased.

[0069] Here, the battery 70 is not limited to a portable battery for an electric bicycle or electric motorcycle, but may be a stationary battery installed in the facility F1.

[0070] 6, when an AC voltage is supplied to the DC power source 10 via a power storage system 80, the power storage system 80 supplies a backup AC voltage to the DC power source 10 when the AC power source P1 fails. The power storage system 80 has a battery charged by the AC power source P1, and when the AC power source P1 fails, the battery is used as a power source to supply an AC voltage to an AC device (AC device) A2 and the DC power source 10. Therefore, when the AC power source P1 fails, the AC / DC converter 101 of the DC power source 10 can convert the AC voltage supplied from the power storage system 80 into a low-voltage DC voltage and supply it to the DC supply line R1. Therefore, even when the AC power source P1 fails, the DC power source 10 can supply a DC voltage to the output device 20 via the DC supply line R1, and can operate the DC devices E1 to E6 connected to the output device 20.

[0071] When a DC voltage is supplied as backup power from the battery 70 or the power storage system 80 to the DC supply line R1 during a power outage of the AC power source P1, the DC power supply capacity may be reduced compared to when the AC power source P1 is energized.

[0072] Therefore, the DC power supply 10 may output a control signal, which operates the DC devices E1-E6 in a suppressed mode in which power consumption is suppressed, superimposed on the DC supply line R1 during backup power supply. The DC devices E1-E6 have a communication circuit that superimposes a communication signal on the DC supply line R1 and communicates by a power line carrier communication method, and the DC devices E1-E6 that receive the control signal from the DC power supply 10 operate in the suppressed mode. Therefore, even the DC power supply 10 that supplies less power than when the AC power supply P1 is energized can supply a DC voltage to the DC devices E1-E6 to operate the DC devices E1-E6.

[0073] In addition, when priorities are set for multiple DC devices E1 to E6 according to their importance, the DC power source 10 may suppress the power consumption of each DC device E1 to E6 by transmitting a control signal to the DC devices E1 to E6 such that the degree of power consumption suppression is greater for DC devices E1 to E6 with lower priorities.

[0074] (3) Variations The above embodiment is merely one of various embodiments of the present disclosure. The above embodiment can be modified in various ways depending on the design and the like as long as the object of the present disclosure can be achieved.

[0075] Modifications of the above embodiment are listed below. The modifications described below can be applied in appropriate combinations.

[0076] (3.1) Variation 1 In the above-described embodiments, the connector portion 41 provided in the DC devices E1 to E5 has the functions of a mechanical connection portion and an electrical connection portion, but in the DC device E7 of Modification 1 (see Figs. 7 and 8), the mechanical connection portion and the electrical connection portion are configured with separate members. Note that, except for the fact that the mechanical connection portion and the electrical connection portion are configured with separate members, this is the same as the above-described embodiments, and therefore common components are denoted with the same reference numerals and their description will be omitted.

[0077] The DC device E7 is attached to the output device 20A fixed to the wall 400. The output device 20A is embedded in the wall 400 using a mounting frame, and a decorative frame 31 is attached to the front side of the mounting frame. A vertically long window hole 32 is provided in the center of the decorative frame 31. The output device 20A has a recess connected to the window hole 32. A button 33 operated to remove the DC device E7 is provided at the bottom of the recess, and a protrusion is configured to protrude forward from the inner wall of the recess when the button 33 is pressed. In addition, the load connection part 22 of the output device 20A has a pair of plate-shaped connection terminals t21, t22, and the pair of connection terminals t21, t22 are arranged on the upper wall of the recess of the output device 20A.

[0078] The DC device E7 has a device body 40C in the shape of a rectangular parallelepiped that is slightly smaller than the window hole 32 of the decorative frame 31. Four USB ports 43 are arranged vertically on the front surface of the device body 40C. A recess 45 into which the button 33 fits is provided on the lower part of the device body 40C. A pair of plate-shaped connection terminals 48 that contact the pair of connection terminals t21, t22, respectively, are provided along the front-rear direction on the upper surface of the device body 40C.

[0079] When the device body 40C of the DC device E7 is inserted into the recess of the output device 20A through the window hole 32 of the decorative frame 31, the device body 40C is held by the output device 20A with the button 33 fitted into the recess 45 of the device body 40C. When the device body 40C is held by the output device 20A, the pair of connection terminals t21, t22 are electrically connected to the pair of connection terminals 48.

[0080] On the other hand, when the DC device E7 held by the output device 20A is to be removed from the output device 20A, the user presses the button 33, and the upper part of the device main body 40C is pushed forward by a protrusion protruding forward from the inner wall of the recess of the output device 20A. At this time, the user can pull forward the upper part of the device main body 40C pushed forward, thereby removing the DC device E7 from the output device 20A.

[0081] Here, in the DC device E7 of the first modification, a fitting structure of the device body 40C that fits into a recess of the output device 20A forms a mechanical connection portion for mechanically attaching the DC device E7 to the output device 20A. Also, a pair of connection terminals 48 of the device body 40C forms an electrical connection portion for electrically connecting to the load connection portion 22. In this way, in the DC device E7 of the first modification, the mechanical connection portion and the electrical connection portion are formed of separate members, so that the mechanical connection portion and the electrical connection portion can each be designed to have an optimal shape.

[0082] The mechanical connection is not limited to the above-mentioned fitting structure, and the method of connecting the mechanical connection can be changed as appropriate. For example, the device body of the DC device may be connected to the output device 20 by a snap-fit ​​method. The device body and the output device 20 may be connected by inserting a protrusion provided on one of the device body and the output device 20 into a groove provided on the other of the device body and the output device 20. In addition, the device body of the DC device may be held against the output device 20 by magnetic force such as a magnet, with the electrical connection of the DC device electrically connected to the load connection portion 22.

[0083] Furthermore, the structure of the electrical connection part can be modified as appropriate. The electrical connection can be made by inserting a pin into a jack, or by bringing planar electrodes provided on both the device body and the output device 20 into surface contact with each other.

[0084] (3.2) Variation 2 The output device of Modification 2 differs from the above embodiment and Modification 1 in that the DC devices E1-E6 are indirectly connected to the output device 20 via an adapter device 50 (see FIGS. 9 and 10). Note that the configuration other than the adapter device 50 is similar to that of the above embodiment or Modification 1, and therefore common components are denoted by the same reference numerals and description thereof will be omitted.

[0085] The DC wiring system 1 further includes an adapter device 50. The adapter device 50 includes a first connection unit 51 electrically connected to the load connection unit 22 of the output device 20, and a plurality of (two in the illustrated example) second connection units 52 to which the DC devices E1 to E6 can be respectively connected. The adapter device 50 distributes the DC voltage input from the first connection unit 51 and outputs the distributed voltage to the second connection unit 52.

[0086] The first connection portion 51 has, for example, the same structure as the connector portion 41 included in the DC devices E1 to E6. The first connection portion 51 includes a cylindrical portion inserted into the fitting hole 221 of the output device 20, and a pair of connection terminals t31, t32 that are disposed inside the cylindrical portion and connected to the pair of connection terminals t21, t22 of the load connection portion 22, respectively.

[0087] The connectors 41 of the DC devices E1 to E6 are connected to the second connection portion 52. As shown in Fig. 10, the second connection portion 52 includes a fitting hole 53 into which the cylindrical portion 42 of the connector portion 41 is inserted, and a pair of connection terminals t33, t34 that are disposed in the fitting hole 53 and electrically connected to the pair of connection terminals of the connector portion 41, respectively. Here, the connection terminal t31 of the first connection portion 51 and the connection terminal t33 of the second connection portion 52 are electrically connected to each other via an internal conductive path, and the connection terminal t32 of the first connection portion 51 and the connection terminal t34 of the second connection portion 52 are electrically connected to each other via an internal conductive path.

[0088] When the first connection portion 51 of the adapter device 50 is connected to the load connection portion 22 of the output device 20, the adapter device 50 is mechanically connected to the output device 20, and a DC voltage is supplied from the load connection portion 22 of the output device 20 to the second connection portion 52 of the adapter device 50. Therefore, when the connector portions 41 of the DC devices E1 to E6 are connected to the second connection portion 52 of the adapter device 50, a DC voltage is supplied to the DC devices E1 to E6, and the DC devices E1 to E6 can be operated.

[0089] Here, since the DC voltage supplied via the DC supply line R1 is a low-voltage DC voltage corresponding to a low-power circuit, even an ordinary user can attach and detach the adapter device 50 to and from the output device 20.

[0090] Although two DC devices can be connected to the adapter device 50 shown in Figures 9 and 10, the adapter device 50 may be configured to allow three or more DC devices to be connected, and the DC voltage supplied from the output device 20 can be distributed and supplied to the three or more DC devices.

[0091] (3.3) Variation 3 11, the output device 20 of the modified example 3 differs from the above embodiment and modified examples 1 and 2 in that it includes a feed wiring connection portion 28 for feeding the DC supply line R1 input from the DC power source 10 to the power source connection portion 21. Note that the configuration other than the feed wiring connection portion 28 is similar to that of the above embodiment or modified examples 1 and 2, and therefore the same reference numerals are used to designate the common components and the description thereof will be omitted.

[0092] The feed wiring connection portion 28 has a pair of connection terminals t13, t14, and the connection terminal t13 is connected to the connection terminal t11 of the power supply connection portion 21 via an internal conductive path, and the connection terminal t14 is connected to the connection terminal t12 of the power supply connection portion 21 via an internal conductive path.

[0093] The feed wiring connection portion 28 is provided, for example, on the rear surface of the housing 27 of the output device 20, and the feed wiring connected to the feed wiring connection portion 28 can be routed to the rear side of the wall 400. The feed wiring connected to the feed wiring connection portion 28 can be used by connecting another output device 20 or a DC device.

[0094] The feed wiring connection section 28 may be provided on the side of the housing 27, and the feed wiring connected to the feed wiring connection section 28 may be arranged along the surface of the wall 400. Also, the relay connector connected to the feed wiring connection section 28 via an electric wire may be arranged on the side of a decorative frame attached to the front side of the mounting frame 30 for fixing the output device 20, and the feed wiring connected to the relay connector on the side of the decorative frame may be arranged along the surface of the wall 400. Also, since the DC voltage supplied through the DC supply line R1 is a low DC voltage, a flat cable can be used for the feed wiring, which has the advantage that the feed wiring is less noticeable even when arranged along the surface of the wall 400. Also, by using a flat cable for the feed wiring, it is possible to wire the feed wiring between the wall 400 and the wallpaper.

[0095] In addition, a forwarding wiring connection section may be provided in the adapter device 50 of variant example 2, and the forwarding wiring connected to the forwarding wiring connection section of the adapter device 50 can be connected to the output device 20, another adapter device 50, or a DC device for use.

[0096] (3.4) Variation 4 12, the output device 20 of the modified example 4 differs from the above embodiment and modified examples 1 to 3 in that a relay contact 231A is connected between the connection terminal t12 of the power supply connection part 21 and the connection terminal t22 of the load connection part 22. That is, in the output device 20 of the modified example 4, the relay contacts 231, 231A are respectively connected between the pair of connection terminals t11, t12 of the power supply connection part 21 and the pair of connection terminals t21, t22 of the load connection part 22. Note that the configuration other than the relay contact 231A is the same as the above embodiment or modified examples 1 to 3, and therefore the same reference numerals are used for the common components and the description thereof will be omitted.

[0097] In the fourth modification, when the voltage input to the power supply connection portion 21 does not satisfy the above-mentioned voltage condition, the protection circuit 23 opens a pair of relay contacts 231, 231A, and both of the pair of power supply paths connecting the DC power supply 10 and the DC devices E1 to E6 can be cut off (double-cut), improving safety compared to the case of single-cut.

[0098] The output device 20 may include a semiconductor switch instead of the relay contacts 231, 231A. The protection circuit 23 can switch between a conductive state and a non-conductive state between the power supply connection part 21 and the load connection part 22 by turning on / off a pair of semiconductor switches connected between the pair of connection terminals t11, t12 and the pair of connection terminals t21, t22.

[0099] (3.5) Other Modifications In the above embodiment, the DC devices E1 to E6 are connected to the output device 20 that is connected to the DC supply line R1, but the DC devices E1 to E6 may be directly connected to the DC supply line R1. In this case, it is preferable that the DC power supply 10 has a function of the protection circuit 23 for the output device 20.

[0100] In the above embodiment, the communication device connected to the DC supply line R1 may superimpose a communication signal by changing the DC voltage of the first voltage (e.g., DC 28 V) applied to the DC supply line R1 to a second voltage (e.g., DC 25 V).

[0101] Furthermore, the communication device may superimpose a small current signal on the DC supply line R1 or superimpose the communication signal by capacitive coupling.

[0102] The communication device may transmit a communication signal by changing the polarity of the DC voltage applied to the DC supply line R1. In this case, the DC devices E1 to E6 connected to the DC supply line R1 can obtain an operating voltage by rectifying the voltage input via the DC supply line R1.

[0103] (summary) As described above, the DC wiring system (1) of the first aspect includes a DC power source (10) and an output device (20) connected to the DC power source (10) via a DC supply line (R1). The output device (20) includes a power source connection section (21) to which the DC supply line (R1) is connected, and a load connection section (22) to which the DC devices (E1 to E6) are directly or indirectly connected. The DC devices (E1 to E6) operate by receiving a supply of DC voltage. When a voltage input to the power source connection section (21) satisfies a voltage condition that allows the DC devices (E1 to E6) to operate, the output device (20) outputs a DC voltage from the load connection section (22).

[0104] According to this embodiment, when the voltage input to the power supply connection unit (21) satisfies the voltage condition, the output device (20) outputs a DC voltage from the load connection unit (22). When the voltage input to the power supply connection unit (21) does not satisfy the voltage condition, the load connection unit (22) does not output a DC voltage. This reduces the possibility that the output device (20) outputs a voltage that prevents the DC devices (E1-E6) from operating, to the DC devices (E1-E6) connected to the load connection unit (22). This makes it possible to provide a DC wiring system (1) that reduces the possibility that the operation of the DC devices (E1-E6) becomes unstable.

[0105] The DC wiring system (1) of the second aspect is the same as the first aspect, and further includes DC devices (E1 to E6). The DC devices (E1 to E6) have mechanical connection parts (41) for mechanically attaching them to the output device (20) and electrical connection parts (41) for electrically connecting them to the load connection part (22). The DC devices (E1 to E6) operate by receiving a supply of DC voltage from the load connection part (22) via the electrical connection part (41).

[0106] According to this embodiment, it is possible to provide a DC wiring system (1) in which the possibility that the operation of the DC devices (E1 to E6) becomes unstable is reduced.

[0107] In the DC wiring system (1) of the third aspect, in the first or second aspect, the DC supply line (R1) is wired to a facility (F1) where the DC devices (E1 to E6) are used. The output device (20) is used in a fixed state at a fixed position in the facility (F1).

[0108] According to this embodiment, the DC devices (E1 to E6) can be used by being directly or indirectly connected to the output device (20) fixed at a fixed position in the facility (F1).

[0109] In the DC wiring system (1) of the fourth aspect, in any one of the first to third aspects, the output device (20) includes a protection circuit (23). The protection circuit (23) cuts off the output of the DC voltage from the load connection part (22) when at least one of the voltage value and polarity of the DC voltage input to the power supply connection part (21) does not satisfy a voltage condition.

[0110] According to this embodiment, it is possible to provide a DC wiring system (1) in which the possibility that the operation of the DC devices (E1 to E6) becomes unstable is reduced.

[0111] In the DC wiring system (1) of the fifth aspect, in any one of the first to fourth aspects, the DC devices (E1 to E6) include power supply devices (E3, E3A, E5, E6) that supply power to a power supply target.

[0112] According to this aspect, power can be supplied from the power supply devices (E3, E3A, E5, E6) to the power supply targets to operate the power supply targets.

[0113] The DC wiring system (1) of the sixth aspect is in any one of the first to fifth aspects, and further includes an adapter device (50). The adapter device (50) includes a first connection part (51) electrically connected to the load connection part (22) of the output device (20), and a plurality of second connection parts (52) to which the DC devices (E1 to E6) can be respectively connected. The adapter device (50) distributes a DC voltage input from the first connection part (51) and outputs the distributed voltage to the second connection part (52).

[0114] According to this embodiment, a plurality of DC devices (E1-E6) can be connected to the second connection parts (52) of the adapter device (50) for use.

[0115] The DC distribution system (1) of a seventh aspect is any one of the first to sixth aspects, further comprising a communication device (E4) that superimposes a communication signal on the DC supply line (R1).

[0116] According to this embodiment, the communication device (E4) can perform communication using the DC supply line (R1) as a communication line.

[0117] The configurations according to the second to seventh aspects are not essential for the DC wiring system (1) and can be omitted as appropriate.

[0118] The output device (20) of the eighth aspect includes a power supply connection part (21) to which a DC supply line (R1) for supplying DC power is connected, and a load connection part (22) to which DC devices (E1 to E6) are directly or indirectly connected. The DC devices (E1 to E6) operate by receiving a supply of DC voltage. When a voltage input to the power supply connection part (21) satisfies a voltage condition that allows the DC devices (E1 to E6) to operate, the output device (20) outputs a DC voltage from the load connection part (22).

[0119] According to this aspect, when the voltage input to the power supply connection unit (21) satisfies the voltage condition, the output device (20) outputs a DC voltage from the load connection unit (22). When the voltage input to the power supply connection unit (21) does not satisfy the voltage condition, the load connection unit (22) does not output a DC voltage. This reduces the possibility that the output device (20) outputs a voltage that disables the DC devices (E1-E6) connected to the load connection unit (22). This makes it possible to provide an output device (20) that reduces the possibility that the operation of the DC devices (E1-E6) becomes unstable.

[0120] The output device (20) of a ninth aspect is the eighth aspect, further including a protection circuit (23). The protection circuit (23) cuts off output of a DC voltage from the load connection part (22) when at least one of the voltage value and polarity of the DC voltage input to the power supply connection part (21) does not satisfy a voltage condition.

[0121] According to this embodiment, it is possible to provide a DC wiring system (1) in which the possibility that the operation of the DC devices (E1 to E6) becomes unstable is reduced.

[0122] The configuration according to the ninth aspect is not essential for the output device (20) and can be omitted as appropriate. [Explanation of symbols]

[0123] 1 DC wiring system 10 DC power supply 20 Output Devices 21 Power connection 22 Load connection 23 Protection circuit 41 Connector part (electrical connection part, mechanical connection part) 50 Adapter device 51 First connection part 52 Second connection part E1~ DC equipment E2 DC equipment E3,E3A,E5,E6 DC equipment (power supply equipment) E4 DC equipment (communication equipment) R1 DC supply line

Claims

1. A DC power source; an output device connected to the DC power source via a DC supply line; A DC device that operates by receiving a DC voltage; The output device includes: a power supply connection portion to which the DC supply line is connected; A load connection portion to which the DC device is directly or indirectly connected, When a voltage input to the power supply connection section satisfies a voltage condition under which the DC device can operate, the output device outputs a DC voltage from the load connection section; The output device is embedded in a wall by inserting a rear portion of the output device into a mounting hole provided in the wall using a mounting frame, The DC device is attached to the front surface of the output device, The DC device is a mechanical connection for mechanically attaching the output device to the output device; an electrical connection portion for electrically connecting to the load connection portion; The DC device is operated by receiving a DC voltage from the load connection part via the electrical connection part. DC wiring system.

2. A DC power source; an output device connected to the DC power source via a DC supply line; and an adapter device, The output device includes: a power supply connection portion to which the DC supply line is connected; A load connection portion to which a DC device that operates by receiving a supply of a DC voltage is directly or indirectly connected, When a voltage input to the power supply connection section satisfies a voltage condition under which the DC device can operate, the output device outputs a DC voltage from the load connection section; the adapter device includes a first connection portion electrically connected to the load connection portion of the output device, and a plurality of second connection portions to which the DC devices can be respectively connected, and distributes a DC voltage input from the first connection portion and outputs the distributed DC voltage to the second connection portions; DC wiring system.

3. A DC power source; an output device connected to the DC power source via a DC supply line; A DC device that operates by receiving a DC voltage; The output device includes: a power supply connection portion to which the DC supply line is connected; A load connection portion to which the DC device is directly or indirectly connected, When a voltage input to the power supply connection section satisfies a voltage condition under which the DC device can operate, the output device outputs a DC voltage from the load connection section; The DC device is a mechanical connection for mechanically attaching the output device to the output device; an electrical connection portion for electrically connecting to the load connection portion; The DC device is operated by receiving a DC voltage from the load connection part via the electrical connection part. DC wiring system.

4. A DC power source; an output device connected to the DC power source via a DC supply line; and an adapter device, The output device includes: a power supply connection portion to which the DC supply line is connected; A load connection section to which a DC device that operates by receiving a DC voltage supply is directly or indirectly connected, When a voltage input to the power supply connection section satisfies a voltage condition under which the DC device can operate, the output device outputs a DC voltage from the load connection section; The output device is embedded in a wall by inserting a rear portion of the output device into a mounting hole provided in the wall using a mounting frame, The DC device is attached to the front surface of the output device, the adapter device includes a first connection portion electrically connected to the load connection portion of the output device, and a plurality of second connection portions to which the DC devices can be respectively connected, and distributes a DC voltage input from the first connection portion and outputs the distributed DC voltage to the second connection portions; DC wiring system.

5. The DC supply line is wired to a facility in which the DC equipment is used, The output device is used in a fixed state at a fixed position in the facility. The DC wiring system according to any one of claims 1 to 4.

6. The output device includes a protection circuit that cuts off the output of a DC voltage from the load connection section when at least one of a voltage value and a polarity of the DC voltage input to the power supply connection section does not satisfy the voltage condition. The DC wiring system according to any one of claims 1 to 5.

7. The DC equipment includes a power supply equipment that supplies power to a power supply target. The DC wiring system according to any one of claims 1 to 6.

8. Further comprising a communication device for superimposing a communication signal on the DC supply line. The DC wiring system according to any one of claims 1 to 7.

Images