JP2024007906A - Wiring fixture and load control system provided therewith - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the possibility that malfunctioning of a load occurs.

SOLUTION: A triac 11 is connected to an AC power supply 4 in series with a load 2. A first rectifier circuit DB1 has a pair of first input terminals t11 that are connected to both ends of the triac 11, respectively. A second rectifier circuit DB2 has a pair of second input terminals t21. One of the pair of second input terminals t21 is connected to the gate electrode G of the triac 11 via an impedance element R2. A power supply circuit 7 is connected between a pair of first output terminals t12 of the first rectifier circuit DB1 and converts the input voltage from the first rectifier circuit DB1 into a DC voltage of a prescribed voltage value. A switching element Q1 is connected between a pair of second output terminals t22 of the second rectifier circuit DB2. A control unit 8 operates by receiving electric power supply from the power supply circuit 7 and turns the switching element Q1 on, so as to turn the triac 11 on.

SELECTED DRAWING: Figure 1

COPYRIGHT: (C)2024,JPO&INPIT

Description

The present disclosure relates to a wiring device and a load control system including the same. More specifically, the present disclosure relates to a wiring device that is connected in series with a load to an AC power source, and a load control system including the same.

Patent Document 1 discloses a two-wire switch device in which a series circuit of a load and a power source is connected between a pair of connection terminals. A main opening/closing section consisting of a three-terminal bidirectional thyristor is connected between the pair of connection terminals. A drive circuit section for driving the main opening/closing section is connected between both ends of the main opening/closing section via a rectifier circuit section. A stabilizing circuit section is provided after the rectifying circuit section, and an operating voltage is supplied from the stabilizing circuit section to the control section. The control section obtains power from the stabilizing circuit section and controls the main opening/closing section to turn on or off. When controlling the main switching section to turn on, the control section shorts the output terminals of the rectifier circuit section and increases the current flowing to the drive circuit section, so that the current from the drive circuit section to the gate electrode of the main switching section exceeds the threshold value. A gate current is applied to turn on the main switching section.

Japanese Patent Application Publication No. 2008-228373

In the above-mentioned two-wire switch device, if the output current of the stabilizing circuit increases by making it highly functional, such as enabling touch operation, the gate current flowing to the gate electrode of the main switching section increases. , the main switching section could turn on unintentionally, potentially causing the load to malfunction.

An object of the present disclosure is to provide a wiring device that reduces the possibility of load malfunction, and a load control system equipped with the same.

A wiring device according to one aspect of the present disclosure includes a triac, a first rectifier circuit, a second rectifier circuit, a power supply circuit, a switch element, and a control section. The triac is connected in series with a load to an AC power source. The first rectifier circuit has a pair of first input terminals respectively connected to both ends of the triac. The second rectifier circuit has a pair of second input terminals. One of the pair of second input terminals is connected to the gate electrode of the triac via an impedance element. The power supply circuit is connected between a pair of first output terminals of the first rectifier circuit, and converts the input voltage from the first rectifier circuit into a DC voltage having a predetermined voltage value. The switch element is connected between a pair of second output terminals of the second rectifier circuit. The control unit operates by receiving power from the power supply circuit, and turns on the triac by turning on the switch element.

A load control system according to one aspect of the present disclosure includes the wiring device and the load. The wiring device and the load are connected in series to the AC power source. The wiring device is capable of switching a power supply state from the AC power supply to the load.

According to the present disclosure, it is possible to reduce the possibility that a malfunction of a load will occur.

FIG. 1 is a block circuit diagram of a load control system including a wiring device according to an embodiment of the present disclosure. FIG. 2 is a block circuit diagram of a load control system including a wiring device according to modification 1. FIG. 3 is a block circuit diagram of a load control system including a wiring device according to a second modification.

(Embodiment)
(1) Overview Each figure described in the following embodiments is a schematic diagram, and the ratio of the size and thickness of each component in each figure does not necessarily reflect the actual size ratio. Not necessarily.

The wiring device 1 of this embodiment includes a triac 11, a first rectifier circuit DB1, a second rectifier circuit DB2, a power supply circuit 7, a switch element Q1, and a control section 8.

The triac 11 is connected in series with the load 2 to the AC power supply 4 .

The first rectifier circuit DB1 includes a pair of first input terminals t11 connected to both ends of the triac 11, respectively.

The second rectifier circuit DB2 includes a pair of second input terminals t21. One of the pair of second input terminals t21 is connected to the gate electrode G of the triac 11 via an impedance element (resistor R2).

The power supply circuit 7 is connected between the pair of first output terminals t12 of the first rectifier circuit DB1, and converts the input voltage from the first rectifier circuit DB1 into a DC voltage having a predetermined voltage value.

Switch element Q1 is connected between a pair of second output terminals t22 of second rectifier circuit DB2.

The control unit 8 receives power from the power supply circuit 7 and turns on the triac 11 by turning on the switch element Q1.

Here, two circuit elements being "connected" refers to a state in which two circuit elements are electrically connected, and is not limited to a connection form in which two circuit elements are directly connected; Connection configurations may also be included in which elements are electrically connected via one or more other circuit elements.

The power supply circuit 7 that supplies power to the control unit 8 is connected between the pair of first output terminals t12 of the first rectifier circuit DB1, and the pair of first input terminals t11 of the first rectifier circuit DB1 are connected to a triac (3 The terminals are connected to both ends of the bidirectional thyristor 11, respectively. This makes it possible to reduce the possibility that the current flowing through the gate electrode G of the triac 11 will increase even if current consumption increases in a circuit such as the control unit 8 that receives power from the power supply circuit 7. Therefore, the possibility that the triac 11 is turned on unintentionally can be reduced, and the possibility that the load 2 will malfunction can be reduced.

Further, the wiring device 1 of this embodiment constitutes a load control system 3 together with the load 2. In other words, the load control system 3 includes the wiring device 1 and the load 2. A wiring device 1 and a load 2 are connected in series to an AC power source 4. The wiring device 1 is capable of switching the power supply state from the AC power source 4 to the load 2.

Here, when the triac 11 included in the wiring device 1 is turned on, a power supply state is established in which the AC power source 4 and the load 2 are connected via the wiring device 1. On the other hand, when the triac 11 is turned off, a cutoff state occurs in which power supply from the AC power supply 4 to the load 2 is cut off. Thereby, in the wiring device 1, the connection state between the AC power source 4 and the load 2 can be switched between a power supply state and a power cutoff state according to whether the triac 11 is turned on or off.

Since the load control system 3 includes the wiring device 1 described above, it is possible to reduce the possibility that the triac 11 provided in the wiring device 1 is turned on unintentionally, and the possibility that the load 2 malfunctions can be reduced. .

(2) Details Hereinafter, the wiring device 1 and the load control system 3 according to the first embodiment will be described in detail with reference to the drawings.

The wiring device 1 includes the triac 11, the first rectifier circuit DB1, the second rectifier circuit DB2, the power supply circuit 7, the switch element Q1, and the control section 8, as described above. In this embodiment, the wiring device 1 further includes an additional function section 9 that operates upon receiving power from the power supply circuit 7. Moreover, the wiring device 1 further includes a first connection terminal 6A and a second connection terminal 6B.

The wiring device 1 of this embodiment is, for example, a two-wire switch device that is used while being embedded in the wall of a building.

A series circuit 5 including an AC power source 4 such as a commercial AC power source and a load 2 to be controlled is connected between the first connection terminal 6A and the second connection terminal 6B. The load 2 is, for example, a lighting fixture having a light source such as an LED (Light Emitting Diode). The wiring device 1 switches the connection state between the AC power source 4 and the load 2 to either a power supply state or a power cutoff state, thereby turning on or off the lighting equipment that is the load 2. Note that the lighting equipment that is the load 2 is not limited to one that includes an LED as a light source, but may include one that includes an organic light emitting diode.

A triac 11 is connected between the first connection terminal 6A and the second connection terminal 6B via a low-pass filter circuit including a capacitor C1 and an inductor L1.

The first rectifier circuit DB1 is, for example, a diode bridge circuit in which four diodes are bridge-connected. A pair of first input terminals t11 of the first rectifier circuit DB1 are connected to both ends (T1 electrode and T2 electrode) of the triac 11, respectively. Specifically, one of the pair of first input terminals t11 is connected to the T1 electrode of the triac 11, and the other of the pair of first input terminals t11 is connected to the T2 electrode of the triac 11.

The power supply circuit 7 is connected to a pair of first output terminals t12 of the first rectifier circuit DB1. The power supply circuit 7 includes, for example, a dropper circuit that steps down the input voltage from the first rectifier circuit DB1, a DC-DC converter that converts the output voltage of the dropper circuit into a DC voltage of a predetermined voltage value, and the like. The power supply circuit 7 generates a DC voltage of a predetermined voltage value and supplies it to the control section 8, additional function section 9, and the like. Note that the power supply circuit 7 is not limited to having a dropper circuit and a DC-DC converter, and the configuration of the power supply circuit 7 can be changed as appropriate.

The second rectifier circuit DB2 is, for example, a diode bridge circuit in which four diodes are bridge-connected. A pair of second input terminals t21 of the second rectifier circuit DB2 are respectively connected to both ends of the triac 11 via, for example, a resistor R1. Specifically, one of the pair of second input terminals t21 is connected to the first end (T1 electrode) of the triac 11 via a resistor R1, which is a second impedance element. Further, the other of the pair of second input terminals t21 is connected to the second end (T2 electrode) of the triac 11. Further, one of the pair of second input terminals t21 is connected to the gate electrode G of the triac 11 via a resistor R2, which is a first impedance element. A capacitor C2 is connected between the gate electrode G of the triac 11 and the T1 electrode.

Further, a switch element Q1 is connected between a pair of second output terminals t22 of the second rectifier circuit DB2 via a resistor R3. The switch element Q1 is, for example, a semiconductor switch element such as an N-channel MOSFET, and is turned on or off according to a control signal input from the control section 8. Here, a drive circuit for driving the triac 11 is configured from the switch element Q1, resistors R1 and R2, capacitor C2, and the like.

The additional function section 9 is for adding a predetermined function to the wiring device 1. The additional function section 9 includes, for example, a detection sensor 10 that detects the presence or absence of a part of the user's body (such as a hand) without contact, and provides the wiring device 1 with a function that enables the operation of the load 2 without contact. Add. The detection sensor 10 includes, for example, an IR sensor that detects infrared rays emitted from a human body, detects in a non-contact manner that a part of the user's body approaches, and outputs a detection signal to the control unit 8 . That is, the detection sensor 10 is used to detect the user's operation without contact.

The main configuration of the control unit 8 is a computer system having one or more processors and memory. The functions of the control unit 8 are realized by the processor of the computer system executing a program recorded in the memory of the computer system. The program may be recorded in a memory, provided through a telecommunications line such as the Internet, or provided recorded on a non-temporary recording medium such as a memory card.

The control unit 8 turns the triac 11 on or off by controlling the switch element Q1 based on the detection result of the detection sensor 10. For example, the control unit 8 switches the lighting equipment, which is the load 2, on and off every time a detection signal is input from the detection sensor 10. Note that a zero-cross point detection signal is input to the control unit 8 every half cycle of the AC voltage from a zero-cross detection circuit that detects zero-cross points of the AC voltage of the AC power supply 4.

When the lighting equipment that is the load 2 is off, the triac 11 is controlled to be off. When a detection signal is input from the detection sensor 10 to the control unit 8 while the lighting equipment is off, the control unit 8 switches the switch element after a predetermined period of time has elapsed from the timing at which the zero-cross point detection signal was input. A drive signal is output to the gate of Q1 to turn on switch element Q1. When the switch element Q1 is turned on, a current flows to the resistor R1 via the second rectifier circuit DB2 and the switch element Q1, and the voltage generated across the resistor R1 (second impedance element) increases to the resistor R2 ( is applied to the gate electrode of the triac 11 via the first impedance element (first impedance element). When the voltage applied to the gate electrode of the triac 11 exceeds a predetermined threshold voltage, the triac 11 is switched from off to on. Thereafter, the triac 11 switches from on to off when the voltage applied across it becomes zero (at the zero-crossing point of the AC voltage). The control unit 8 repeats the above operation every half cycle of the AC voltage, and the triac 11 is intermittently turned on, so that power is supplied from the AC power source 4 to the load 2, and the lighting equipment as the load 2 is turned on. Light. Note that, when an operation signal specifying a dimming level is input from the operating unit, for example, the control unit 8 determines the period during which the triac 11 is on within a half cycle of the AC voltage according to the specified dimming level. The light may be dimmed by adjusting it.

Further, when a detection signal is input from the detection sensor 10 to the control unit 8 while the lighting fixture as the load 2 is on, the control unit 8 turns off the switch element Q1. When the switch element Q1 is turned off, no voltage is generated at the gate electrode of the triac 11, and the triac 11 remains in the off state, so that the lighting fixture, which is the load 2, is turned off.

The wiring device 1 of this embodiment has the above configuration, and the pair of first input terminals t11 of the first rectifier circuit DB1 are connected to both ends of the triac 11, respectively. Therefore, the current flowing through the first rectifier circuit DB1 flows through a current path that does not pass through the impedance element (resistor R2). For example, in a half cycle of the AC voltage in which the potential of the first connection terminal 6A is higher than the potential of the second connection terminal 6B, a current flows from the first connection terminal 6A to the second connection terminal 6B through the first rectifier circuit DB1. flows. In addition, in a half cycle of the AC voltage in which the potential of the second connection terminal 6B is higher than the potential of the first connection terminal 6A, a current flows from the second connection terminal 6B to the first connection terminal 6A through the first rectifier circuit DB1. flows. In this way, the current flowing through the first rectifier circuit DB1 flows through a current path that does not pass through the resistor R2, which is an impedance element, so that the current flows through the control section 8 and/or the additional function section 9, which is the load of the power supply circuit 7. Even if current consumption increases, the possibility that the voltage applied to the gate electrode G of the triac 11 will increase can be reduced. Therefore, even if the current consumption of the control section 8 and/or the additional function section 9, which are the loads of the power supply circuit 7, increases, the possibility that the triac 11 will be turned on unintentionally can be reduced, and the possibility that the load 2 will malfunction can be reduced. It is possible to reduce the

Further, since the detection sensor 10 can detect the user's operation without contact, the user can operate the wiring device 1 without touching the wiring device 1.

(3) Modifications The above embodiment is just one of various embodiments of the present disclosure. The embodiments described above can be modified in various ways depending on the design, etc., as long as the objective of the present disclosure can be achieved.

Modifications of the above embodiment will be listed below. The modified examples described below can be applied in combination as appropriate.

(3.1) Modification example 1
FIG. 2 shows a block diagram of the wiring device 1 of Modification 1. The wiring device 1 of Modification 1 differs from the above embodiment in that the additional function section 9 includes a touch panel 12 that receives touch operations from the user. Note that the configuration other than the additional function section 9 is the same as in the above embodiment, so the same reference numerals are given to the common components and the explanation thereof will be omitted.

When the touch panel 12 receives a touch operation (operation such as a tap or a swipe) by the user, it outputs an operation signal corresponding to the touch operation to the control unit 8 .

The control unit 8 turns on or off the triac 11 by controlling the switch element Q1 based on an operation signal input from the touch panel. Thereby, the user can switch the load state by performing a touch operation on the touch panel, which has the advantage of improving operability.

Even if the current consumption of the touch panel included in the additional function section 9 increases, the possibility that the triac 11 will be turned on unintentionally can be reduced, and the possibility that the load 2 will malfunction can be reduced.

(3.2) Modification 2
FIG. 3 shows a block diagram of a wiring device 1 according to a second modification. The wiring device 1 of Modification 2 differs from the above embodiment or Modification 1 in that the additional function section 9 includes a wireless communication section 13 that performs wireless communication with an external device 20. Note that the configuration other than the additional function section 9 is the same as in the above embodiment, so the same reference numerals are given to the common components and the explanation thereof will be omitted.

When the external device 20 is, for example, a remote control device for remotely controlling the load 2, the control unit 8 controls the triac by controlling the switch element Q1 based on the reception signal that the wireless communication unit 13 receives from the external device 20. 11 on or off. Thereby, the wiring device 1 can control the operating state of the load 2 based on the remote control signal from the external device 20.

Note that the external device 20 is not limited to a remote control device, and may be any other wiring device. The wiring device 1 may control the operating state of the load 2 based on a wireless signal received by the wireless communication unit 13 from another wiring device. Further, the external device 20 may be an input device for inputting setting information regarding the operation of the wiring device 1, and the control unit 8 may perform the following operations based on the setting information included in the wireless signal received by the wireless communication unit 13 from the input device. Settings related to operation may also be made.

Thereby, the wiring device 1 can be operated remotely using the external device 20 (operation for switching the state of the load 2, operation for making settings related to operation, etc.).

The wireless communication unit 13 may include an infrared communication module that performs infrared communication with the external device 20, or may include a radio wave communication module that performs radio wave communication with the external device 20. The radio communication module is a wireless communication module compliant with standards such as Wi-Fi (registered trademark), Bluetooth (registered trademark), ZigBee (registered trademark), or low-power wireless that does not require a license (specified low-power wireless). Adopt. Note that the communication method adopted by the radio wave communication module can be changed as appropriate.

(3.3) Other Modifications In the above embodiment, the explanation has been made on the assumption that the load 2 connected to the wiring device 1 is a lighting device, but the load 2 is not limited to a lighting device, and may also be a ventilation fan or the like. good.

Further, the wiring device 1 is not limited to being used embedded in the wall of a building, etc., but may be used exposed on the surface of the wall or the like, or it may be installed on the floor etc. It may also be used while it is placed. Further, the wiring device 1 may be used while being installed on a wall or the like inside a moving object such as a vehicle, a railway vehicle, an aircraft, or a ship.

(summary)
As explained above, the wiring device (1) of the first aspect includes a triac (11), a first rectifier circuit (DB1), a second rectifier circuit (DB2), a power supply circuit (7), and a switch. It includes an element (Q1) and a control section (8). A triac (11) is connected in series with a load (2) to an AC power source (4). The first rectifier circuit (DB1) has a pair of first input terminals (t11) respectively connected to both ends of the triac (11). The second rectifier circuit (DB2) has a pair of second input terminals (t21). One of the pair of second input terminals (t21) is connected to the gate electrode (G) of the triac (11) via an impedance element (R2). The power supply circuit (7) is connected between a pair of first output terminals (t12) of the first rectifier circuit (DB1), and converts the input voltage from the first rectifier circuit (DB1) into a DC voltage of a predetermined voltage value. do. The switch element (Q1) is connected between a pair of second output terminals (t22) of the second rectifier circuit (DB2). The control unit (8) operates by receiving power from the power supply circuit (7), and turns on the triac (11) by turning on the switch element (Q1).

According to this aspect, it is possible to reduce the possibility that the load (2) will malfunction.

In the wiring device (1) of the second aspect, in the first aspect, the current flowing through the first rectifier circuit (DB1) flows through a current path that does not go through the impedance element (R2).

According to this aspect, it is possible to reduce the possibility that the load (2) will malfunction.

In the wiring device (1) of the third aspect, in the first or second aspect, the impedance element (R2) is the first impedance element. One of the pair of second input terminals (t21) is connected to the first end (T1) of the triac (11) via the second impedance element (R1), and the other of the pair of second input terminals (t21) is connected to the triac (11) is connected to the second end (T2).

According to this aspect, it is possible to reduce the possibility that the load (2) will malfunction.

The wiring device (1) of the fourth aspect, in any one of the first to third aspects, further includes an additional function section (9) that operates by receiving power from the power supply circuit (7).

According to this aspect, even if the power consumption of the additional function section (9) increases, the possibility of the triac (11) being turned on unintentionally can be reduced, and the possibility of malfunction of the load (2) occurring. can be reduced.

In the wiring device (1) of the fifth aspect, in the fourth aspect, the additional function section (9) includes a detection sensor (10) that detects the user's operation in a non-contact manner. The control unit (8) turns on or off the triac (11) by controlling the switch element (Q1) based on the detection result of the detection sensor (10).

According to this aspect, the wiring device (1) can be operated without touching the wiring device (1).

In the wiring device (1) of the sixth aspect, in the fourth aspect, the additional function section (9) includes a wireless communication section (13) that performs wireless communication with an external device (20).

According to this aspect, there is an advantage that the wiring device (1) can be operated remotely using the external device (20).

In the wiring device (1) of the seventh aspect, in the fourth aspect, the additional function section (9) includes a touch panel (12). The control unit (8) turns on or off the triac (11) by controlling the switch element (Q1) based on the operation signal input from the touch panel (12).

According to this aspect, there is an advantage that the operability of the wiring device (1) is improved.

The load control system (3) according to the eighth aspect includes the wiring device (1) according to any one of the first to seventh aspects and a load (2). A wiring device (1) and a load (2) are connected in series to an AC power source (4). The wiring device (1) is capable of switching the power supply state from the AC power source (4) to the load (2).

According to this aspect, it is possible to reduce the possibility that the load (2) will malfunction.

The configurations according to the second to seventh aspects are not essential to the wiring device (1) and can be omitted as appropriate.

1 Wiring equipment 2 Load 3 Load control system 4 AC power supply 7 Power supply circuit 8 Control section 9 Additional function section 10 Detection sensor 11 Triac 12 Touch panel 13 Wireless communication section DB1 First rectifier circuit DB2 Second rectifier circuit G Gate electrode Q1 Switch element R1 Resistor (second impedance element)
R2 resistor (impedance element, first impedance element)
t11 First input terminal t12 First output terminal t21 Second input terminal t22 Second output terminal

Claims (8)

A triac connected in series with a load to an AC power supply,
a first rectifier circuit having a pair of first input terminals respectively connected to both ends of the triac;
a second rectifier circuit having a pair of second input terminals, one of the second input terminals being connected to the gate electrode of the triac via an impedance element;
a power supply circuit connected between a pair of first output terminals of the first rectifier circuit and converting an input voltage from the first rectifier circuit into a DC voltage having a predetermined voltage value;
a switch element connected between a pair of second output terminals of the second rectifier circuit;
a control unit that operates upon receiving power from the power supply circuit and turns on the triac by turning on the switch element;
Wiring equipment. The current flowing through the first rectifier circuit flows through a current path that does not pass through the impedance element.
The wiring device according to claim 1. the impedance element is a first impedance element;
One of the pair of second input terminals is connected to the first end of the triac via a second impedance element, and the other of the pair of second input terminals is connected to the second end of the triac.
The wiring device according to claim 1. further comprising an additional functional unit that operates upon receiving power from the power supply circuit;
The wiring device according to claim 1. The additional function section includes a detection sensor that detects a user's operation in a non-contact manner,
The control unit turns on or off the triac by controlling the switch element based on the detection result of the detection sensor.
The wiring device according to claim 4. The additional function section includes a wireless communication section that performs wireless communication with an external device.
The wiring device according to claim 4. The additional function section includes a touch panel,
The control unit turns on or off the triac by controlling the switch element based on an operation signal input from the touch panel.
The wiring device according to claim 4. The wiring device according to any one of claims 1 to 7,
The load;
The wiring device and the load are connected in series to the AC power source,
The wiring device is capable of switching a power supply state from the AC power source to the load.
Load control system with.

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