JP2011066975A - Load control unit for house wiring, and house wiring system using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To control loads Li (i=1, 2, ..., n) in a concentrated manner. <P>SOLUTION: A distribution switchboard 10 having a main circuit breaker 11 and a load controller 20 are provided, and the load controller 20 controls the relay Ri (i=1, 2, ..., n) of each branch feeder Fi (i=1, 2, ..., n) according to a control signal Sci (i=1, 2, ..., n) from a control unit 21. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an indoor wiring load control device capable of easily realizing a centralized management function of various loads in an indoor wiring system, and an indoor wiring system using the same.

  There has been proposed an indoor wiring system in which a plurality of outlet units having a branch breaker are connected to a trunk line drawn from a main breaker (Patent Document 1).

  In this system, when the load current of the main line becomes excessive, for example, the branch breakers in the outlet units are shut off according to a preset shut-off order, thereby centrally controlling the branch breakers of each outlet unit distributed and arranged. The load can be managed. In addition, this system is suitable for the floor wiring system in a free access floor, for example.

  On the other hand, in the above system, since it is necessary to wire a signal line for controlling the branch breaker in each outlet unit in addition to the power line, it is inevitable that the overall configuration becomes complicated. Thus, in order to omit the signal line, it has been proposed to remotely control a circuit breaker in a load connection table tap by applying a so-called power line carrier communication technique (Patent Document 2).

JP-A-8-65925 JP 2004-266923 A

  In the latter case of such a conventional technique, since it is necessary to incorporate a data processing unit for power line carrier communication into the table tap, a general-purpose wiring device cannot be used, and the overall cost may increase significantly. In addition, there is a problem in that data interference may occur between indoor wirings in other adjacent buildings where power lines are continuous, which may cause malfunction of load control.

  Therefore, in view of the problems of the prior art, the object of the present invention is to insert a relay switching contact in one line of each branch feeder, so that it is not necessary to use a complicated signal line, and only a general-purpose wiring device is used. It is an object to provide a load control device for indoor wiring that can be easily constructed by using and an indoor wiring system using the load control device.

  In order to achieve this object, the structure of the invention of claim 1 includes a plurality of branch feeders, a relay interposed in each of the branch feeders, a current detector for detecting a load current of each branch feeder, and a current detector. And a control unit for individually sending a control signal to each relay. Each relay has a switching contact inserted in one line of the branch feeder, and the switching contact The gist is to divide the line into two lines and draw it out.

  The gist of the structure of the invention of claim 2 is that it comprises a distribution board having a main breaker and the load control device for indoor wiring of the invention of claim 1 connected to a branch breaker of the distribution board.

  A three-way switch can be interposed between the branch feeder of the load control device and the load. A current detector is provided to detect the load current of the main breaker, and the output signal of the current detector is input to the control unit. can do.

  According to the configuration of the invention of claim 1, the relay interposed in each of the plurality of branch feeders inserts a switching contact into one line of the branch feeder, divides the one line into two lines, and draws it to the outside. Yes. Each relay is individually controlled by a control signal from the control unit, and an output signal of a current detector that detects a load current of each branch feeder is input to the control unit. Therefore, the control unit controls the relay of an arbitrary branch feeder according to a predetermined algorithm set in advance, thereby turning on and off the load connected to the branch feeder to centrally manage the load. be able to. That is, the load of the branch feeder where the load current is actually detected is in operation with the power turned on, the relay switching contact can be reversed to shut off the power, and the load of the branch feeder where the load current is not detected The power supply is shut off and stopped, and the power can be turned on by reversing the switching contact of the relay.

  The relay of each branch feeder can use a three-way switch provided near the load as a hand switch by dividing one line of the branch feeder into two lines through a switching contact and pulling it out to the outside. A three-way switch can be used to cut off the power of a load that has been turned on by a relay by interposing between the load and the two wires drawn through the relay switching contact. This is because it is possible to turn on the power of the loaded load. However, it is assumed that each branch feeder is configured in a single-phase two-wire system.

  The algorithm for controlling the load of each branch feeder can be arbitrarily set for each load. For example, it may be programmed at regular time intervals according to the year, season, month, day, day of the week, etc., may be automatically stopped after a certain time from the start of operation, for example, a sensor that detects the opening and closing of the entrance door, Operation may be automatically started or stopped by an output signal from a human sensor installed at a specific location. Further, these control algorithms may be incorporated as software in the control unit, or may be incorporated as software in a personal computer combined with the control unit via a LAN. For example, a mobile phone may be connected via a router connected to the LAN. It may be instructed remotely from an external terminal. For example, a touch switch type display setting device may be attached to the control unit, and an algorithm for controlling an arbitrary load may be manually input.

  According to the configuration of the invention of claim 2, by connecting the load control device of claim 1 to the branch breaker of the distribution board having the main breaker, the indoor wiring system is constructed and the function of the load control device is realized. be able to.

  The three-way switch interposed between the branch feeder of the load control device and the load can be used as a hand switch. The three-way switch may be a general-purpose wiring device that is installed above and below a staircase and blinks the lighting device at two locations.

  By inputting the output signal of the current detector that detects the load current of the main breaker of the distribution board to the control unit, for example, when the overall power consumption of the indoor wiring system is excessive, a predetermined algorithm (cut off) It is possible to easily realize a load cut-off function that automatically cuts off the operating load according to the order) and automatically avoids a total power failure due to a trip of the main breaker. This is because the total power consumption can be detected by the load current of the main breaker. Note that the threshold value for detecting the excessive power consumption may be set in a plurality of stages, and the allowable duration may be set for each stage. Further, such an algorithm may be set and stored by software in the control unit, or may be set in a personal computer connected to the control unit via a LAN or the like.

Overall block diagram Detailed view of the main part of FIG. Overall schematic system diagram FIG. 2 equivalent view showing another embodiment

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  The indoor wiring system includes a distribution board 10 and a load control device 20 for indoor wiring (FIG. 1).

  The distribution board 10 includes a main breaker 11 and a plurality of branch breakers 12 connected to the main breaker 11. A current detector 13 is disposed downstream of the main breaker 11, and the current detector 13 can detect the load current Io of the main breaker 11 and output it as an output signal So.

  The load control device 20 is connected to the downstream side of the branch breaker 12 of the distribution board 10. The load control device 20 has a plurality of branch feeders Fi (i = 1, 2,... N). Each branch feeder Fi has a current detector Ci (i = 1, 2,... N) and a relay Ri (i = 1, 2, ... n) are equipped. The current detector Ci can detect the load current Ii (i = 1, 2,... N) of the branch feeder Fi and output it as an output signal Si (i = 1, 2,... N). Each branch feeder Fi is pulled out of the load control device 20 and is supplied to a load Li (i = 1, 2,... N) via a three-way switch SWi (i = 1, 2,... N) as a hand switch. It is connected.

  A control unit 21 is built in the load control device 20. In addition to the output signal So from the current detector 13 in the distribution board 10, the output signal Si from the current detector Ci on each branch feeder Fi is individually input to the control unit 21. Further, the control signal Sci (i = 1, 2,... N) from the control unit 21 is individually sent to the relay Ri interposed in the branch feeder Fi. A personal computer 32 is bidirectionally connected to the control unit 21 via a LAN 31, and a timer 33 is bidirectionally connected. A router (not shown) or the like can be connected to the LAN 31 together.

  The branch feeder Fi is configured in a single-phase two-wire system (FIG. 2). The upstream side of the branch feeder Fi is connected to the branch breaker 12 of the distribution board 10 via common terminals T1 and T2. The relay Ri inserts a single-pole / double-throw switching contact TC into one line of the branch feeder Fi, divides the single line into two lines via the switching contact TC, and pulls it out of the load control device 20. The single line on the switching contact TC side of the branch feeder Fi is drawn to the outside through the terminals Tai, Tbi (i = 1, 2,... N), and the other single line of the branch feeder Fi passes through the relay Ri. Then, it is pulled out through the terminal Tci (i = 1, 2,... N).

  The relay Ri includes a latch-type drive mechanism RD that inverts and switches the switching contact TC via the control signal Sci from the control unit 21 by the power supply voltage upstream of the switching contact TC. That is, the relay Ri can be switched by alternately inverting the switching contact TC between the terminal Tai side and the terminal Tbi each time a pulse-like control signal Sci is output from the control unit 21. Note that the drive mechanism RD of the relay Ri may be either a one-coil type or a two-coil type.

  The three-way switch SWi interposes the switching contact TCs between the terminals Tai and Tbi of the branch feeder Fi and the load Li, and allows the other one line of the branch feeder Fi to pass through, so that the terminals T1i and T2i. Power is supplied to the load Li via (i = 1, 2,... N). The three-way switch SWi is installed in the vicinity of the load Li in the building K (FIG. 3). The load control device 20 is housed in a dedicated box similar to the distribution board 10.

  Regardless of the switching state of the switching contact TC of the relay Ri, the load Li of each branch feeder Fi is switched on by manually operating the three-way switch SWi near the load Li to switch the switching contact TCs. And can be blocked. In FIG. 2, when the switching contact TC of the relay Ri is on the terminal Tai side (solid line in the figure), the switching contact TCs of the three-way switch SWi is set to the terminal Tai side (solid line in the figure) and the load Li is turned on. This is because the switching contact TCs can be set to the terminal Tbi side (dotted line in the figure) to cut off the power. When the switching contact TC of the relay Ri is on the terminal Tbi side (dotted line in the figure), the switching contact TCs of the three-way switch SWi is set to the terminal Tbi side (dotted line in the figure), and the load Li is turned on. This is because the power source can be shut off by setting the switching contact TCs to the terminal Tai side (solid line in the figure). That is, the three-way switch SWi can be used as a hand switch for the load Li.

  Similarly, the control unit 21 turns on the power of the load Li by inverting the switching contact TC of the relay Ri via the control signal Sci regardless of the switching state of the switching contact TCs of the three-way switch SWi. Can be cut off. Therefore, the control unit 21 can centrally control and manage the operating state of the load Li according to an arbitrary algorithm set in advance. Note that the load Li whose power is cut off in this way does not consume so-called standby power, and shifts to a completely stopped state.

  Such a control algorithm for the load Li may be set and stored in the control unit 21, set and stored in the personal computer 32, executed via the control unit 21, or stored in the control unit 21 via the LAN 31. You may perform via the control unit 21 by instruct | indicating from the external terminal to connect. Further, the operation status of the load Li can be displayed in real time on one or both of the control unit 21 and the personal computer 32. The time element in the algorithm may use the timer 33, or may use the microcomputer in the control unit 21 or the clock function of the personal computer 32.

  When the control unit 21 detects that the load current Io of the main breaker 11 detected by the current detector 13 in the distribution board 10 is excessive, the control unit 21 automatically cuts off the load Li in accordance with a preset turn-off sequence. A total power outage due to trips can be avoided. However, the load Li automatically shut off in this way can be returned to the operating state by manually operating the three-way switch SWi as necessary.

  In this system, only the power line for the load Li needs to be wired in the building K (FIG. 3), and there is no need to wire a special signal line in the building K. In addition, since power line carrier communication is not used, all the appliances including the three-way switch SWi can use general-purpose wiring appliances. However, the load Li is not limited to FIG. 3, and may be any electric appliance such as an air conditioner, a refrigerator, a washing machine, floor heating, a television, and a personal computer in addition to the lighting fixture. Further, a plurality of electric appliances may be connected in parallel to each branch feeder Fi instead of the single load Li.

Other embodiments

  1 to 3, the load Li of a specific branch feeder Fi may omit the three-way switch SWi (FIG. 4).

  When the load Li is manually operated to be turned on and off by a dedicated remote control device, such as an air conditioner or a television, when the load Li during operation is automatically stopped by the control signal Sci from the control unit 21, a relay is used. By switching the switching contact TC of Ri, the power supply of the load Li is cut off for a few seconds, for example, and turned on again. As a result, the load Li shifts from a normal operation state to a so-called standby state. Thereafter, if necessary, the load Li is manually turned on using a dedicated remote control device to return to the original operation state. Can be made.

Fi (i = 1, 2,... N)... Branch feeder Ri (i = 1, 2,... N)... Relay Ci (i = 1, 2... N)... Current detector SWi (i = 1, 2,... N). Three-way switch TC ... Switching contact So, Si (i = 1, 2, ... n) ... Output signal Io, Ii (i = 1, 2, ... n) ... Load current Sci (i = 1, 2, ... n) ... Control signal DESCRIPTION OF SYMBOLS 10 ... Distribution board 11 ... Master breaker 12 ... Branch breaker 13 ... Current detector 20 ... Load control device 21 ... Control unit

Patent Applicant Kagatsu Corporation
Inaba Electric Industry Co., Ltd.
Attorney Tadaaki Matsuda, Attorney

Claims (4)

  A plurality of branch feeders, relays interposed in each of the branch feeders, a current detector for detecting a load current of each branch feeder, and an output signal of the current detector are individually input, and each of the relays A control unit that individually sends a control signal to each of the relays, wherein each relay inserts a switching contact into one line of the branch feeder, and the switching contact divides the one line into two lines. A load control device for indoor wiring, characterized by being pulled out to the outside.   An indoor wiring system comprising: a distribution board having a main breaker; and a load control device for indoor wiring according to claim 1 connected to a branch breaker of the distribution board.   The indoor wiring system according to claim 2, wherein a three-way switch is interposed between the branch feeder and the load of the load control device.   The indoor wiring system according to claim 2 or 3, wherein a current detector for detecting a load current of the main breaker is provided, and an output signal of the current detector is input to the control unit.

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