JP2008141600A - Real connection structure of power line communication and indoor wiring structure for power line communication - Google Patents

Abstract

Provided are a power line communication substantive connection structure and an indoor wiring structure in which signal attenuation of power line communication is suppressed and an optical fiber is easily routed.
A dedicated outlet 302 used for power line communication is provided in the vicinity of the inlet in a room 3 where an inlet 18 of an optical fiber 17 is provided, and the distribution board 5 for indoor wiring is not connected to the dedicated outlet 302. A cable 9 of a dedicated electric circuit wired at the branch is provided. A media converter 19 is connected to the end of the optical fiber 17 drawn into the room 3, and the power cord 20 a of the PLC modem 20 connected thereto is connected to the dedicated outlet 302.
[Selection] Figure 1

Description

  The present invention relates to an actual connection structure and an indoor wiring structure for power line communication (PLC).

  Power line communication is a communication method in which a data communication signal is superimposed on a commercial AC voltage (current) using a power line as a signal transmission line, and has an advantage that it is not necessary to newly perform communication wiring. There may be various forms of power line communication depending on the range of use of the power line. For example, in a detached house, it is possible to construct a system combining FTTH (Fiber To The Home) and LAN (Local Area Network) by power line communication. (For example, refer to Patent Document 1).

  In this case, indoor wiring is mainly used as a signal transmission path for power line communication, and terminal devices such as personal computers and information home appliances are connected to a plurality of PLC modems (power line communication devices) connected to an outlet, respectively. Is configured. On the other hand, an optical fiber is drawn into the house and connected to the home LAN via a media converter (ONU) and a PLC modem. As a result, each terminal device can be connected to an external network such as the Internet.

Japanese Patent Laying-Open No. 2005-150975 (FIG. 5)

  However, since the signal frequency of power line communication is much higher than that of commercial AC frequency, signal attenuation may occur when indoor wiring is used as a signal transmission path, and good communication may be hindered. In addition, because the optical fiber cannot be bent with a small radius of curvature due to its structure, it is difficult to route the optical fiber when the indoor wiring of the optical fiber becomes long. Since the spread of power line communication is expected in the future, it is desired to perform indoor wiring in consideration of power line communication in advance, especially in a new house.

  In view of such problems, an object of the present invention is to provide a power line communication substantive connection structure and an indoor wiring structure in which signal attenuation of power line communication is suppressed and an optical fiber can be easily routed.

  The power line communication substantive connection structure of the present invention is provided in the vicinity of the service entrance in a room where an optical fiber service entrance is provided, and a dedicated outlet used for power line communication, and an optical fiber drawn into the room. A media converter connected to a terminal; a power line communication device connected to the media converter and having a power cord connected to the dedicated outlet; and a dedicated electric circuit wired non-branched from a distribution board to the dedicated outlet It is a thing.

  In the actual connection structure of power line communication as described above, the signal line of the power line communication due to the branching is prevented because the power distribution from the distribution board to the dedicated outlet is a dedicated power line wired in a non-branching manner. In addition, since a dedicated outlet is provided in the vicinity of the inlet in the room where the optical fiber inlet is provided, the media converter and the power line communication device can be arranged in the vicinity of the inlet.

Moreover, in the said entity connection structure, it is preferable that an entrance, a dedicated outlet, a media converter, and a power line communication apparatus are arrange | positioned on the same wall surface in a room, or the mutually adjacent wall surface.
In this case, a dedicated outlet, a media converter, and a power line communication device can be collectively arranged in the vicinity of the service entrance.

  On the other hand, the indoor wiring structure for power line communication of the present invention is provided in the vicinity of the service entrance in a room where an optical fiber service entrance is provided, separately from a dedicated electrical outlet for home appliances, and used for power line communication. And a dedicated electric circuit wired unbranched from the distribution board to the dedicated outlet.

  In the indoor wiring structure for power line communication as described above, the signal line of the power line communication due to branching is prevented because the power distribution from the distribution board to the dedicated outlet is a dedicated power circuit wired in a non-branching manner. In addition, since a dedicated outlet is provided in the vicinity of the inlet in the room where the optical fiber inlet is provided, the power line communication media converter and the power line communication device can be disposed in the vicinity of the inlet.

  According to the actual connection structure of the power line communication apparatus or the indoor wiring structure for power line communication of the present invention, signal attenuation of power line communication in the electric path from the distribution board to the dedicated outlet is suppressed, and the optical fiber can be easily routed. .

  FIG. 1 is a connection diagram showing an actual connection structure for power line communication (or an indoor wiring structure for power line communication) according to an embodiment of the present invention. In the figure, it is assumed that this detached house H includes, for example, four illustrated rooms 1, 2, 3, and 4. A distribution line 5 for indoor wiring provided in the room 1 is connected to a lead-in wire 6 from an outdoor wiring via a watt hour meter (not shown). Two distribution cables (VVF) 7 to 14 are drawn out from the distribution board 5, and these are wiring for outlets of the rooms 1 to 4.

Specifically, the destinations of the cables 7 to 14 are as follows.
Cable 7: General-purpose outlet 401 provided below the wall surface of the room 4
Cable 8: General-purpose outlet 301 provided below the wall surface of the room 3
Cable 9: Dedicated outlet 302 provided above the wall surface of the room 3
Cable 10: A dedicated outlet 303 provided above the wall surface of the room 3
Cable 11: General-purpose outlet 101 provided below the wall surface of the room 1
Cable 12: A general-purpose outlet 201 provided below the wall surface of the room 2
Cable 13: Dedicated outlet 202 provided above the wall surface of the room 2
Cable 14: Dedicated outlet 102 provided on the wall of the room 1

  Here, the cables 9, 10, 13, 14 are “dedicated electric circuits” wired from the distribution board 5 to the dedicated outlets 302, 303, 202, 102 in a non-branching manner. The dedicated outlets 202 and 303 are typically used for air conditioners, and the dedicated outlet 102 is used, for example, for household electric appliances (microwave oven, dishwasher, electromagnetic cooker, etc.) with high power consumption. The location and number of outlets are only examples. Further, although there are actually wiring for illumination, wiring for switches, and the like, they are omitted here.

  On the other hand, the two dedicated outlets 302 are not for home appliances but for power line communication. The dedicated outlet 302 is provided in the vicinity of the inlet 18 of the room 3 where the inlet 18 of the optical fiber 17 is provided, separately from the dedicated outlet 303 for home appliances (for example, for an air conditioner). A media converter (ONU: Optical Network Unit) 19 is connected to the end of the optical fiber 17 drawn into the house. The media converter 19 is connected to a PLC modem 20 (master unit) via a communication cable 21. The media converter 19 has an interface function with the PLC modem 20 by, for example, Ethernet (registered trademark).

  The dedicated outlet 302 is provided on the same wall surface as the service entrance 18 or on a wall surface adjacent to the corner of the room 3 and is close to the service entrance 18 (for example, within 1 m). The media converter 19, the PLC modem 20, and the dedicated outlet 302 are arranged close to each other, and the power cords 19a and 20a of the media converter 19 and the PLC modem 20 are both connected to the dedicated outlet 302. Accordingly, the service port 18, the dedicated outlet 302, the media converter 19 and the PLC modem 20 are arranged on the same wall surface in the room 3 or adjacent wall surfaces in a state of being close to each other.

  As for actual attachment, the media converter 19 and the PLC modem 20 may be installed on furniture such as a shelf, or may be installed on a wall. FIG. 2 is a diagram illustrating an example of wall-mounted installation. The media converter 19 and the PLC modem 20 are attached to the wall surface 30 and are concentrated in the vicinity of the dedicated outlet 302. The optical fiber 17 is drawn into the room from the dedicated drawing port 18 or drawn using the hole 30a for connecting the air conditioner 31 to the outdoor unit as a drawing port.

With the above arrangement (FIGS. 1 and 2), the media converter 19, the PLC modem 20, and the dedicated outlet 302 are arranged in the vicinity of the inlet 18, so that the drawing length of the optical fiber 17 is reduced. The length can be shortened, and routing becomes easy.
Since the media converter 19 and the PLC modem 20 are close to each other, the communication cable 21 needs only a very short length. Although it is possible to make the communication cable 21 longer, it is preferable not to make it longer from the viewpoint of saving communication wiring, which is one of the advantages of power line communication.

  On the other hand, the PLC modem 22 installed in the room 2 of FIG. 1 can perform power line communication with the PLC modem 20 of the master unit via the distribution board 5 by connecting the power cord 22a to the general-purpose outlet 201. It becomes a state. Similarly, the PLC modem 23 installed in the room 4 can be connected to the general-purpose outlet 401 by connecting the power cord 23a to the general-purpose outlet 401 so that power line communication can be performed with the PLC modem 20 of the master unit via the distribution board 5. Become. Although not shown, terminal devices such as personal computers and information home appliances are connected to the PLC modems 20, 22, and 23 to form a home LAN using indoor wiring as a signal transmission path. Connection to an external network such as the Internet via the fiber 17 is possible. The arrangement and number of PLC modems 22 and 23 are merely examples.

  FIG. 3 is a connection diagram showing an internal configuration of the distribution board 5 while extracting and showing a portion related to the power line communication in FIG. 1. In the figure, the lead-in wire 6 is a single-phase three-wire system, and has a first electric circuit R (red) and a second electric circuit B (black) on the non-ground side, and a third electric circuit W (white) on the ground side. The voltage between RW and B-W is 100V, and the voltage between RB is 200V. The lead-in wire 6 is connected to a main circuit breaker 5M in the distribution board 5. The secondary circuit of the circuit breaker 5M branches into a plurality of (here, eight) circuits, and circuit breakers 50 to 57 are provided in each circuit. And power is supplied to various places in the house via these circuit breakers 50-57.

  The illustrated example is a case where only 100 V is supplied, and the circuit breakers 50 to 57 are connected to R, W or B, W. Which is actually connected is arbitrarily determined at the time of construction of electric work, and is usually distributed equally to both. In this example, the circuit breakers 50 to 53 are connected to R and W, and the circuit breakers 54 to 57 are connected to B and W. In PLC modems (PLC modem 20-PLC modem 23) that receive power supply from two lines that are on the same line, power lines for power line communication are interconnected via distribution board 5. On the other hand, in the PLC modems (for example, PLC modem 20-PLC modem 22) that receive power supply from two wires that are different from each other, only one common wire (electric circuit W) is interconnected via the distribution board 5, The other lines are interconnected via an upstream transformer (not shown) located outdoors.

  In the configuration as described above, power line communication between the PLC modems 20, 22, and 23 is performed via the distribution board 5 under the control of the PLC modem 20 of the parent device. Here, in particular, with respect to the PLC modem 20 which is the master unit, since the circuit breaker 52 of the distribution board 5 to the dedicated outlet 302 is a dedicated electric circuit cable 9 which is wired in a non-branched manner, the signal of power line communication by branching Attenuation is prevented, and signal attenuation of power line communication in this electric path is suppressed. Therefore, it is possible to ensure a good communication state of power line communication. Strictly speaking, since there are two outlets in the dedicated outlet 302, there is a branch of the electric circuit here, but since the distance between the two outlets is short (less than ¼ of the wavelength λ used for power line communication), It will not be a fork.

  In the above embodiment, the number of dedicated outlets 302 is two. However, the power cord 19a of the media converter 19 is not used for power line communication, and therefore the power source does not necessarily have to be taken from the dedicated outlet 302. For example, if the power cord 19a of the media converter 19 is lengthened, it can be connected to a general-purpose outlet 301 as shown in FIG. In this case, only one dedicated outlet 302 is required for the PLC modem 20. The other configuration in FIG. 4 is the same as that in FIG.

  In the above embodiment, the media converter 19 and the PLC modem 20 are separated from each other. However, as shown in FIG. 5, they can be integrated into a single case 24. In this case, only one power cord 24a is required, and only one dedicated outlet 302 is sufficient. The other configuration in FIG. 5 is the same as that in FIG.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined not by the above-mentioned meaning but by the scope of claims for patent, and is intended to include all modifications within the scope and meaning equivalent to the scope of claims for patent.

FIG. 3 is a connection diagram illustrating an actual connection structure for power line communication (or an indoor wiring structure for power line communication) according to an embodiment of the present invention. It is a figure which shows the example of arrangement | positioning which installed the media converter and the PLC modem on the wall near the exclusive outlet. FIG. 2 is a connection diagram illustrating an internal configuration of a distribution board while extracting and showing a portion related to power line communication in FIG. 1. It is a connection diagram in which the power supply connection of the media converter is different from that in FIG. FIG. 2 is a connection diagram different from FIG. 1 in which a media converter and a PLC modem are integrated.

Explanation of symbols

3 rooms 5 distribution board 9 dedicated circuit 17 optical fiber 18 service port 19 media converter 20 PLC modem (power line communication device)
20a Power cord 302 Dedicated outlet

Claims (3)

A dedicated outlet provided near the service entrance in the room where the service entrance for the optical fiber is provided, and used for power line communication,
A media converter connected to the end of an optical fiber drawn into the room;
A power line communication device connected to the media converter and having a power cord connected to the dedicated outlet;
An actual connection structure for power line communication, comprising: a dedicated circuit routed in a non-branching manner from a distribution board to the dedicated outlet.   2. The power line communication substantive connection structure according to claim 1, wherein the service port, the dedicated outlet, the media converter, and the power line communication device are arranged on the same wall surface in the room or adjacent wall surfaces. Separately from a dedicated outlet for home appliances, a dedicated outlet provided near the service entrance in a room where an optical fiber service entrance is provided and used for power line communication,
An indoor wiring structure for power line communication, comprising: a dedicated circuit routed in a non-branching manner from the distribution board to the dedicated outlet.

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