JP2000133473A - Two-wire type wiring tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an excellent two-wire type wiring tool provided with a power supply part capable of feeding power required for an operation part without carrying it as a steady current, to a series circuit from a commercial power source through a power supply part to the operation part. SOLUTION: A load switching device 10 having a human body detecting function has two wire connection terminals T1, T2 and is composed of a rectifying circuit part 11, a power supply part 12, an operation part 13, a voltage feeding circuit 14, a load switching part 15 and a driving circuit part 16, and thus, an excellent two-wire type wiring tool provided with the power supply part 12 capable of feeding power required for the operation part 13 without carrying it as a steady current, to a series circuit from a commercial power source 1 through the power supply part 12 to the operation part 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a two-wire wiring device.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 6, when a person approaches, a commercial power supply 1 is supplied to a lighting fixture 2 corresponding to a load by automatically turning on a load switching unit 43 to light the lighting fixture 2. When a person moves away, the load switch 43 with a human body detection function used for automatic blinking control of the lighting fixture is configured to automatically turn off the load switching unit 43 to cut off the supply of the commercial power 1 to the lighting fixture 2 and turn off the light. There are 40. The load switching device 40 with a human body detection function includes a power supply unit 41, an operation unit 42, and a load switching unit 43. The operation section 42 is a section for driving and operating the load switching section 43.
2a, an infrared sensor section 42b, and a daylight sensor section 42c
It is comprised including.

A power supply 41 is supplied with power from the commercial power supply 1 and always supplies power to an operation unit 42, that is, an opening / closing control unit 42a, an infrared sensor unit 42b, and a daylight sensor unit 42c. The operation unit 42, that is, the opening / closing control unit 42 a, the infrared sensor unit 42 b, and the daylight sensor unit 42 c always operate by receiving power supply from the power supply unit 41.

[0004] The infrared sensor section 42b always operates by receiving power supply from the power supply section 41, has a predetermined sensing area (not shown), and detects infrared rays emitted by a human body passing through the sensing area. Open / close control unit 42a that detects and outputs a human body detection signal
As shown in FIG. 7, an optical system 42b1 composed of a condensing lens or a reflecting mirror formed of a polyethylene resin and a change in infrared light collected by the optical system 42b1 are applied. A pyroelectric element 42b2 for outputting a voltage,
An amplifier circuit 42b3 that amplifies and outputs a voltage output from the pyroelectric element 42b2, a filter circuit 42b4 that removes noise components from the output of the amplifier circuit 42b3, and outputs only a predetermined frequency band component, and a filter circuit 42b4. A comparison circuit b for outputting a signal to the output circuit b when the output is larger than a predetermined threshold;
And an output circuit 42b6 that outputs a human body detection signal to the opening / closing control section 42a when receiving a signal from the switching section 42a.

[0005] The daylight sensor section 42c always operates by receiving power supply from the power supply section 41, constantly detects ambient illuminance, which is the ambient brightness, and sets the ambient illuminance lower than a predetermined illuminance value. When the illuminance is darker, a dark signal indicating that the ambient illuminance is darker than a predetermined illuminance value is output to the opening / closing controller 42a.

The opening / closing control section 42a always operates by receiving power supply from the power supply section 41, and operates in the daylight sensor section 42c.
The load switch 43 is turned on by a logical product (AND) of the dark signal and the human body detection signal from the load switch 43, the load switch 43 is kept on for a predetermined time, and then the load switch 4 is turned on again.
3 is turned off.

Therefore, in the load switching device 40 with a human body detecting function as described above, the commercial power supply 1 → the load switching unit 43
→ In addition to the closed circuit of the load 2, it is necessary to secure a closed circuit of the commercial power supply 1 → the power supply unit 41 → the operation unit 42, and it is necessary to provide four electric wire connection terminals T1,. When the load switchgear 40 with the detection function is installed, there is a problem that the number of wirings is increased.

Therefore, in order to solve the above-mentioned problem, the power supply unit 41, the operation unit 42, and the load switching unit in the load switching device 40 with the human body detection function described above are provided only with two electric wire connection terminals. 43, which can be built in
2. Description of the Related Art A two-wire wiring device disclosed in 33535 is known.

The two-wire wiring device disclosed in Japanese Patent Application Laid-Open No. 1-133535 is a remote control adapter 5 as shown in FIG.
0. The remote controller adapter 50 includes two electric wire connection terminals T1 and T2, and has a power supply unit 5 therein.
1, an operation unit 52, a load switching unit 53, and an auxiliary circuit 54. The operation unit 52 includes an opening / closing control unit 52a and a remote control signal receiving unit 52b.

In the remote controller adapter 50 shown in FIG. 8, the auxiliary circuit 54 is connected to a circuit including the load 2 in parallel with the load switching
3 is provided with an impedance capable of reducing the load voltage to a level that does not lead to driving of the load 2 when the load 2 is off. Further, the power supply unit 51 is connected to a circuit including the load 2 in a state of being in series with each of the load switching unit 53 and the auxiliary circuit 54,
Regardless of ON / OFF of the load switching unit 53, the operation unit 52
(Opening / closing control unit 52a and remote control signal receiving unit 52b)
Power supply.

However, in the above-described conventional two-wire wiring device, the power supply unit 51 always functions regardless of whether the load switching unit 53 is turned on or off. Are inserted in series. In addition, although a constant voltage element such as a constant voltage diode is used to always stably output a constant voltage from the power supply unit 51 connected in this way, the power supply unit 51 is driven when the load switching unit 53 is off. To avoid this, the impedance of the auxiliary circuit 54 connected in parallel to the load switching unit 53 is increased. Therefore,
The current flowing through the power supply unit 51 greatly differs depending on whether the load switching unit 53 is on or off.

This means that the output voltage of the power supply unit 51 becomes unstable, and an element having a large current capacity is required to withstand a rush current when a load is applied, that is, when the load switching unit 53 is turned on. It must be used, and measures against heat generation are also required, resulting in an increase in size and cost. In recent years, inverter-type fluorescent lighting fixtures, which have become widespread due to energy savings, are much more efficient at loading loads than conventional incandescent lighting fixtures and fluorescent lighting fixtures using iron-copper type ballasts. There is a problem that a large inrush current flows, elements such as a constant voltage diode of the power supply unit 51 are easily broken, and a circuit configuration for preventing the damage becomes very complicated.

Therefore, in order to solve the above-mentioned problems, it is possible to stably supply power to the operation unit irrespective of a change in the impedance of the load and the ON / OFF state of the load switching unit. The two-wire type wiring device disclosed in Japanese Patent No. 204533 was invented.

The two-wire wiring device disclosed in Japanese Patent Application No. 09-204533 is a load switch 60 with a human body detection function as shown in FIG. The load switching device 60 with a human body detection function includes two electric wire connection terminals T1 and T2, and includes therein a rectifier circuit portion 61, a power supply portion 62, an auxiliary power supply circuit 63, an operation portion 64, And a load switching unit 65. The operation unit 64 includes an opening / closing control unit 62a, an infrared sensor unit 62b, and a daylight sensor unit 62c.

The two-wire wiring device shown in FIG. 10 is provided with a new power supply means 66 without the auxiliary power supply circuit 63 of the load switchgear 60 with the two-body detection function shown in FIG. .

A load switchgear 6 with a human body detecting function shown in FIG.
At 0, the power supply unit 62 is connected in parallel to the load switching unit 65, and when the load switching unit 65 is in the off state, the impedance that can reduce the load voltage to a level at which the load 2 cannot be driven is used. Prepare. The auxiliary power supply circuit 63
Supplies a stable power to the operation unit 64 regardless of the impedance change of the load 2 and the ON / OFF state of the load switching unit 65. Further, in the load switching device 60 with a human body detection function shown in FIG.
Numeral 5 enables the continuous ON state for a long time.

[0017]

However, in the above-described conventional two-wire wiring device, the power supply of the auxiliary power supply circuit 63 is limited.

In the load switching device 60 with a human body detecting function shown in FIG. 9, the power supply unit 62 is connected in parallel with the load switching unit 65, and when the load switching unit 65 is off, the load is switched off. The voltage is set to an impedance that can be reduced to a level at which the load 2 cannot be driven.
A high resistance of about 1M is connected in series in order to lower the input voltage to the input terminal.

Further, a circuit current that can be supplied to the operation unit 64 via the power supply unit 62 also flows to the load 2, and the current value during standby does not discharge the lighting tube of the glow type low power factor fluorescent lamp. In addition, it is necessary to suppress the current flowing at the time of the glow ignition tube discharge starting voltage (approximately 65 V AC) to be less than the current value, and it is necessary to suppress the circuit current within the range of approximately 150 to 180 μA. As a result, the current consumption of the operation unit 64 is reduced to the circuit current 150.
Can be set only within the range of about 180 μA,
4 has a problem that the usable circuits are limited.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. It is an object of the present invention to supply a current necessary for an operation section as a steady current to a series circuit of a commercial power supply → power supply section → operation section. An object of the present invention is to provide an excellent two-wire wiring device including a power supply unit capable of supplying power required by an operation unit without using the power supply unit.

[0021]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides an AC power supply connected in series to a load via a power supply section and a rectifier circuit section. An operation unit connected to a power supply, detecting the presence or absence of a human body, and outputting the detection signal to a drive circuit for driving the load;
In a two-wire wiring device, comprising: a load switching unit that is opened and closed by the drive circuit and that includes a switching element that performs drive control of the load, and a voltage supply circuit that supplies a voltage to the detection circuit when the load is driven. A power supply circuit connected to an output of the rectifier circuit, a first switching element interposed in series on a line on the operation unit side, a current limiting element on the other side of the first switching element; A power storage element having a charge-charging function on the other side of the current limiting element; and a second power storage element connected in series to a line closer to the operation unit than a connection point between the first switching element and the power storage element.
A switching element, a voltage detection circuit that monitors a charging voltage value of the power storage element and detects whether the charging voltage value has reached a preset voltage value, and receives a detection signal of the voltage detection circuit. A control unit capable of switching between an open state and a closed state of the first and second switching elements, wherein the control unit is configured to switch the first and second switching elements when the charging voltage value of the power storage element is equal to or less than a preset voltage value. When the switching element is in a closed circuit state and the second switching element is in an open circuit state, and when the voltage value of the power storage element exceeds a preset voltage value, the first switching element is opened. And the second switching element is in a closed circuit state.

According to a second aspect of the present invention, the power supply circuit is inserted between the other side of the second switching element and an operation unit, and lowers a charging voltage of the front storage element below the charging voltage. A voltage conversion circuit that converts the voltage into a voltage and outputs the voltage to the operation unit.

According to a third aspect of the present invention, the voltage conversion circuit includes a coil connected to the other side of the second switching element and serially interposed in a line on the operation unit side, A diode having a cathode connected to the connection point between the switching element and the coil, and an anode connected to the ground side;
A capacitor having a positive electrode connected to a connection point between the coil and the operation unit.

According to a fourth aspect of the present invention, the voltage conversion circuit includes a first switching element having a transformer primary side connected to the other side of the second switching element and an anode connected to the secondary side. The diode and the cathode of the second diode are connected to the cathode side, and the connection point is connected to the coil interposed in series on the line on the operation section side, and the positive side is connected to the connection point between the coil and the operation section. And a capacitor.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of a two-wire wiring device according to the present invention will be described with reference to FIGS. 1 and 2, and a second embodiment will be described with reference to FIG. This will be described in detail.

[First Embodiment] FIG. 1 is a block diagram showing a load switchgear with a human body detection function as a two-wire wiring device. In FIG. 1, reference numeral 1 denotes an AC commercial power supply of AC 100 V, reference numeral 2 denotes a load such as a lighting fixture whose on / off is controlled, and reference numeral 10 denotes a load switchgear having a human body detecting function corresponding to a two-wire wiring device.

As shown in FIG. 1, the load switchgear 10 with a human body detecting function is provided with two electric wire connection terminals T1 and T2, and includes therein a rectifier circuit unit 11, a power supply unit 12, and an operation unit. 13, a voltage supply circuit 14, a load switching unit 15,
A drive circuit section 16 and a phase detection section 17 are provided.

The voltage supply circuit 14 includes an electric wire connection terminal T1,
The constant voltage circuit 12g and the operation unit 1 are connected between the load switching unit 15 and the input connection point of the rectifier circuit unit 11, and when the load switching unit 15 is on and the load 2 is on.
3, and is configured by a CT (current transformer: current converter) or the like.

The rectifier circuit section 11 is a section for rectifying an AC voltage obtained from the commercial power supply 1 including the load 2 and the voltage supply circuit 14, and is constituted by a diode bridge or the like. 14, the load switching unit 15, and the electric wire connection terminal T2.

The power supply section 12 removes ripples from the pulsating voltage supplied from the commercial power supply 1 including the load 2 via the voltage supply circuit 14 and the rectifier circuit section 11 to smooth the pulsating voltage and to reduce the ripple voltage to a predetermined voltage. It is a part that supplies power to the operation unit 13 after conversion, and includes a first switching element 12a, a second switching element 12b, and a voltage detection circuit 12c.
And a storage element 12d such as a capacitor, and a control unit 12e.
, A voltage conversion circuit 12f, a constant voltage circuit 12g such as a three-terminal regulator, and a current limiting element 12h such as a resistor.

The voltage detection circuit 12c determines whether the pulsating voltage supplied from the rectifier circuit unit 11 has exceeded a preset voltage value, and outputs the result to the control unit 12e. When the pulsating voltage is equal to or lower than a preset voltage value, the control unit 12e sets the first switching element 12a to an on state and sets the second switching element 12b to an off state. At this time, the storage element 12d is connected to the load 2
From the commercial power supply 1 including the rectifier circuit unit 11 and the first switching element 12a to the voltage value preset by the control unit 12e.

Further, when the pulsating voltage exceeds a preset voltage value, the control unit 12e sets the first switching element 12a to an off state and sets the second switching element 12b to an on state. . At this time, the storage element 1
2d discharges to the constant voltage circuit 12g and the operation unit 13 via the second switching element 12b to transmit power.

The current supplied from the commercial power supply 1 including the load 2 via the rectifier circuit unit 11 is directly supplied to the operation unit 1.
4, the control unit 12e performs control such as shifting the timing so that the first switching element 12a and the second switching element 12b are not turned on at the same time. When the storage element 12d is charged, that is, the first switching element 12a
Is connected, the input current limiting element 12h is connected so that a peak current like an inrush current such that the load 2 is turned on or the glow discharge tube discharges does not flow into the power storage element 12d via the load 2. May be required. Furthermore, when the first switching element 12a is turned off at a preset pulsating voltage value, it is necessary that the storage element has already charged the required voltage.

Here, the capacitance value of the storage element 12d is set to be substantially the same as the capacitance value of the noise prevention capacitor built into the glow low power factor fluorescent lamp of 0.006 μF to 0.01 μF, thereby increasing the glow. The voltage applied to both ends of the lighting tube can be suppressed to less than the discharge starting voltage of the glow lighting tube. In addition, the charging voltage of the storage element 12d is obtained by dividing the electric power required in the operation unit by １ ／ × (capacity value of the storage element 12d) ×
The current limiting element is set to a voltage value that can be sufficiently secured as (square of the charging voltage of the power storage element 12d) and prevents the glow discharge tube from starting discharging by the charging current flowing until the charging voltage is reached. It is necessary to set 12h and the charging voltage.

The voltage conversion circuit 12f is １ ／ × (capacitance value of the storage element 12d) × in which the second switching element 12b is turned on and the storage element 12d is charged.
When the energy of (the square of the charging voltage of the storage element 12d) is discharged, the energy is converted to a low voltage within the input voltage range of the constant voltage circuit 12g, and the constant voltage is maintained until the next discharge is performed. It stores power that can supply power to the circuit 12g and the operation unit 13.

For example, as shown in FIG. 2, the voltage conversion circuit 12f includes a diode 12f1, a coil 12f2, and a capacitor 12f3. In other words, the second switching element 12b is turned on, the charge is instantaneously transferred from the power storage element 12d to the capacitor 12f3 via the coil 12f2, and the capacitor 12f3 is charged (ie, the discharge current flows to the capacitor 12f3). Is done. The charging voltage of the capacitor 12f3 is determined by the storage element 12d, the coil 12f2, and the capacitor 1f.
For example, assuming that the capacity of the storage element 12d is 10 nF, the charging voltage is 60 V, the coil 12f2 is 20 mH, the capacitor 12f3 is 22 μF, and the operation unit load impedance is 10 KΩ, the capacitor 12f
3, the charging voltage of about 3.5 V is obtained, and an average of about 350 μA can be supplied to the operation unit 13.

The operation unit 13 is a unit that always operates by receiving power supply from the power supply unit 12 or the voltage supply circuit 14. The operation unit 13 includes a judgment processing unit 13a, an infrared sensor unit 13b, a daylight sensor unit 13c, and a judgment processing unit 13d. It is comprised including.

The infrared sensor section 13b is a section which always operates by receiving power supply from the power supply section 12 or the voltage supply circuit 14, has a predetermined sensing area (not shown), and a human body passing through the sensing area. And outputs a human body detection signal to the determination processing unit 13a. Note that the internal configuration of the infrared sensor section 13b is the same as that described with reference to FIG.

The daylight sensor section 13c is a section which always operates by receiving power supply from the power supply section 12 or the voltage supply circuit 14, and is constituted by, for example, a Cds light receiving element or a photodiode, and has the surrounding brightness. If the ambient illuminance is darker than a predetermined illuminance value, a dark signal notifying the fact is output to the determination processing unit 13a.

The judgment processing unit 13a always operates by receiving power supply from the power supply unit 12 or the voltage supply circuit 14, and operates the logical product (AND) of the dark signal and the human body detection signal.
With the ON signal of D), the drive circuit unit 16 is instructed to turn on, the load switching unit 15 is kept on for a predetermined time, and then the drive circuit unit 16 is again instructed to turn off.

The drive circuit section 16 instructs the load switching section 15 to turn on with an on signal from the operation section 13 and instructs the load switching section 15 to turn off with an off signal.

The load switching section 15 is a section for making the input section of the rectifier circuit 11 substantially short-circuited based on an ON instruction from the drive circuit 16. In this case, the load switching unit 1
Numeral 5 is composed of a semiconductor switching element such as a triac.

The phase detecting section 17 detects that the pulsating voltage of the rectifying circuit section 11 has reached a predetermined voltage value, and outputs a signal to that effect to the drive circuit section 16.

The above-described load switchgear 10 with a human body detection function is connected as follows. That is, the wire connection terminal T1,
Is connected to one of the commercial power supplies 1. The electric wire connection terminal T2 is connected to the other side of the commercial power supply 1 via the load 2. Further, one end of the voltage supply circuit 14 is connected to the wire connection terminal T1, and the input / output unit of the load switching unit 15 and the rectification circuit unit 11 is connected to the other end of the voltage supply circuit 14.

The anode output of the rectifier circuit 11 is connected to the power supply 1
The input unit is connected to the input unit of the first switching element 12a, which is the input unit of the second, and one of the drive circuit unit 16 and the phase detection unit 17, respectively. The other of the drive circuit section 16 and the phase detection section 17 is connected to the cathode output section of the rectification circuit section 11. The common part of the power supply unit 12 (that is, the first switching element 12a
, The second switching element 12b, and the voltage detection circuit 1
2c, the storage element 12d, the control unit 12e, the voltage conversion circuit 12f, and the constant voltage circuit voltage detection circuit 12c) are connected to the cathode output unit of the rectification circuit unit 11. The first switching element 12a is connected to one of the power storage elements 12d and the input of the second switching element 12b. The output of the second switching element 12b is connected to the input of the voltage conversion circuit 12f, and the output is connected to the output of the constant voltage circuit 12g. The output unit of the power supply unit 12 (that is, the output of the constant voltage circuit unit 12g) is connected to one of the operation units 13 (that is, one of the determination processing unit 13a, one of the infrared sensor unit 13b, and one of the daylight sensor unit 13c). And) respectively. Common parts of the operation unit 13 (that is, common parts of the determination processing unit 13a, the infrared sensor unit 13b, and the daylight sensor unit 13c) are connected to the cathode output unit of the rectifier circuit unit 11, respectively.

The load switchgear 10 with the human body detecting function configured as described above operates as follows. When the wire connection terminals T1 and T2 of the load switchgear 10 with a human body detection function are connected to the commercial power supply 1 including the load 2 when the surroundings are bright in the daytime or the like, the judgment processing unit 13 is set within a predetermined time (eg, about 5 seconds).
a, the load 2 is forcibly turned on (for several seconds) so that the infrared sensor unit 13b, the daylight sensor unit 13c, and the power supply unit 12 reach the operating voltage, and the voltage is supplied to the constant voltage circuit 12g via the voltage supply circuit 14. Supply voltage.

When the output of the constant voltage circuit 12g is stabilized, the load 2 is turned off, the voltage supply from the voltage supply circuit 14 is stopped, and the pulsating voltage is input to the input of the power supply unit 12. The control unit 12 e of the power supply unit 12
a and the second switching element 12b to charge and discharge the storage element 12d for each half-wave of the pulsating output voltage of the rectifier circuit section 11 so that the output of the voltage conversion circuit 12f reaches a predetermined voltage. And the voltage is stably supplied to the constant voltage circuit 12g and the operation unit 13. During this time, the constant voltage circuit 1
The output voltage of 2 g is supplied by a storage element such as an electrolytic capacitor. As described above, the power supply unit 12 of the load switchgear 10 with the human body detection function includes the determination processing unit 13a,
Power is supplied to the infrared sensor unit 13b and the daylight sensor unit 13c. Note that depending on the configuration, the voltage detection circuit 12c,
Power may be supplied to the control unit 12e.

Thereafter, the daylight sensor 1
No dark signal is output from 3c, a standby state signal is output from the determination processing unit 13a to the drive circuit unit, and the load switching unit 15 remains set to the off state.

Thereafter, when the surroundings become dark at night, the daylight sensor unit 13c outputs a dark signal to the judgment processing unit 13c. When a person, such as a visitor, enters the sensing area of the infrared sensor unit 13b, the infrared sensor unit 13b
b outputs a human body detection signal to the determination processing unit 13a. Then, the determination processing unit 13a outputs an operation state signal to the drive circuit unit 16 for a predetermined time (for example, about one minute) by using a logical product (AND) of the dark signal and the human body detection signal. Further, the drive circuit unit 16 turns on the load switching unit 15 and turns on the load 2 based on the operation state signal.

It should be noted that a phase detecting section 17 for detecting that the voltage value of the pulsating voltage of the rectifier circuit section 11 has reached a predetermined voltage value and outputting a signal to that effect is provided.
Prevents inrush current by instructing the load switching unit 15 to be turned on using an on signal of a logical product (AND) of the on signal from the operation unit 13 and the signal from the phase detection unit 17 Can be.

When the load switching unit 15 is on, the input voltage of the power supply unit 12 becomes almost zero volts,
Is in a state in which sufficient power cannot be supplied to the determination processing unit 13a, the infrared sensor unit 13b, and the daylight sensor unit 13c, but in such a state, the power is connected in series to the commercial power supply 1 and the load 2. The voltage supply circuit 14 uses the lighting current of the load 2 to replace the power supply unit 12 and
g, since power is supplied to the determination processing unit 13a, the infrared sensor unit 13b, and the daylight sensor unit 13c, the constant voltage circuit 12
g, the determination processing unit 13a, the infrared sensor unit 13b, and the daylight sensor unit 13c can continue to operate without stopping.

In other words, according to the load switchgear 10 with a human body detecting function corresponding to the two-wire wiring device configured as described above, when the power is turned on, the constant voltage circuit 12g is operated via the voltage supply circuit 14 and the operation is performed. Power can be supplied to the unit 13 (the determination processing unit 13a, the infrared sensor unit 13b, and the daylight sensor unit 13c), and the load switchgear 10 with a human body detection function can be quickly made operable. Timing charts of the above operation are shown in FIGS.

In the standby state, the power supply unit 12 performs charging / discharging of the storage element 12d and voltage conversion by the voltage conversion circuit 12f, thereby making a judgment processing unit 13a and an infrared sensor unit 13a.
b and a daylight sensor section 13c, a current corresponding to or at the time of the start of discharge of the glow-lighting tube is supplied to the operation portion 13, and when the load 2 is a glow low power factor fluorescent lamp, the lighting tube Since the terminal voltage can be suppressed to be lower than the discharge starting voltage, it is possible to prevent a slight discharge of the glow lighting tube during standby and prevent the life of the lighting tube from deteriorating.

In operation, the voltage supply circuit 1
4, a constant voltage circuit 12g, a determination processing unit 13a,
The power supply to the operation unit 13 including the infrared sensor unit 13b and the daylight sensor unit 13c and the lighting of the load 2 are compatible.

Also, when the type of the load 2 changes, even if the impedance of the load 2 changes due to, for example, a change from a fluorescent lighting device to an incandescent lighting device, the impedance of the load 2 is compared with the impedance of other lighting devices. Since the circuit impedance is sufficiently high, the operation unit 1 including the determination processing unit 14a, the infrared sensor unit 14b, and the daylight sensor unit 14c
4 can provide a stable power supply.

[Second Embodiment] FIG. 3 is a block diagram showing a load switching device with a human body detection function as a two-wire wiring device. In FIG. 3, the same portions as those of the load switchgear with a human body detection function as the two-wire wiring device of the first embodiment shown in FIGS. The detailed description of is omitted.

The load switchgear 10 with a human body detecting function shown in FIG. 3 is different from that of the first embodiment in that the voltage conversion circuit 12f includes a first diode 12f.
1 and the second diode 12f4 and the coil 12f
2, and the capacitor 12f3 and the transformer 12f5.

That is, when the second switching element 12b is turned on and the charge stored in the storage element 12d flows into the primary coil of the transformer 12f5 as an oscillating current, the turns ratio is applied to the secondary coil of the transformer 12f5. Generates an oscillation current corresponding to. The converted oscillation current instantaneously moves to the capacitor 12f3 via the coil 12f2. That is, when the oscillation current flows through the capacitor 12f3, the capacitor 12f3 is charged. The charging voltage of the capacitor 12f3 is determined by the storage element 12d, the coil 12f
2, determined by the values of the capacitor 12f3 and the transformer 12f5. For example, the capacity of the storage element 12d is 10n
F, the charging voltage is 60V, and the turns ratio of the transformer 12f5 is 1
0: 1, the capacity of the coil 12f2 is 20 mH, the capacitor 12f3 is 22 μF, and the operation section load impedance is 10
Assuming KΩ, the charging voltage of the capacitor 12f3 is about 3.
About 5 V can be obtained, and an average of about 350 μA can be supplied to the operation unit.

The present invention is not limited to the above-described embodiment, but can be controlled by a switching element such as a thyristor or FET by connecting the load switching unit 15 to the output side of the rectifier circuit unit 11. If the drive circuit unit 16, the determination processing unit 14a, and the phase detection unit 17 are integrated, any one of them can be omitted. If the current of the operation unit 14 is much smaller than the discharge starting current of the glow lighting tube of the glow low power factor fluorescent lamp, the electric storage element 1
If the charging voltage of 2d is lowered and set within the input voltage range of the constant voltage circuit, the voltage conversion circuit 12f can be omitted, and the peak value of the charging current of the storage element 12d is determined by the lighting of the load 2 or the glow lighting tube. If the discharge is not affected, the current limiting resistor 12h may be omitted, and instead of the infrared sensor unit 14b or the daylight sensor unit 14c, a receiving unit of a wireless remote controller may be used. Modifications can be made without departing from the spirit of the present invention, and all such modifications are included.

[0060]

According to the first aspect of the present invention, when the load is a glow low power factor fluorescent lamp, the glow lighting tube does not discharge and the operation unit is stably supplied to the operation unit with a simple configuration. It is possible to temporarily store as much power as can be supplied in the power storage element, and it is possible to provide an excellent two-wire wiring device that does not limit the type of load.

According to the second aspect of the present invention, in addition to the effect of the first aspect of the present invention, the circuit current of the operating section can be reduced even if the load is a glow low power factor fluorescent lamp with a simple structure. Even if the current is equal to or greater than the discharge starting current of the glow-lighting tube, the glow-lighting tube does not discharge, the input voltage of the constant-voltage circuit can be reduced, and stable power can be supplied to the operation unit. There is an effect that an excellent two-wire wiring device can be provided without limiting the circuit of the unit and without limiting the type of load.

According to the third aspect of the present invention, in addition to the effects of the first to second aspects of the present invention, an excellent two-wire system capable of realizing a reduction in the input voltage of the constant voltage circuit with a simple configuration. This has the effect of providing a wiring device.

According to the fourth aspect of the invention, in addition to the effects of the first to third aspects, an excellent two-wire system capable of realizing a reduction in the input voltage of the constant voltage circuit with a simple configuration. This has the effect of providing a wiring device.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a two-wire wiring device according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing a main part of a voltage conversion circuit in the two-wire wiring device according to the first embodiment of the present invention.

FIG. 3 is a block diagram showing a two-wire wiring device according to a second embodiment of the present invention.

FIG. 4 is a time chart illustrating an operation of a main part of the two-wire wiring device according to the first embodiment of the present invention.

FIG. 5 is a time chart showing the operation of the two-wire wiring device of the first embodiment according to the present invention.

FIG. 6 is a block diagram showing a conventional load switching device with a human body detection function.

FIG. 7 is a block diagram showing an infrared sensor section of a conventional load switching device with a human body detection function.

FIG. 8 is a block diagram showing a first example of a conventional two-wire wiring device.

FIG. 9 is a block diagram showing a second example of a conventional two-wire wiring device.

FIG. 10 is a block diagram showing a second example of a conventional two-wire wiring device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Commercial power supply 2 Load 11 Rectifier circuit part 12 Power supply part 12a 1st switching element 12b 2nd switching element 12c Voltage detection circuit 12d Energy storage element 12e Control part 12f Voltage conversion circuit 12h Current limiting element 13 Operation part 14 Voltage supply circuit 15 Load switching unit 16 Drive circuit unit

Claims (4)

[Claims] An AC power supply connected in series to a load via a power supply unit and a rectifier circuit unit, detects the presence or absence of a human body, and sends the detection signal to a drive circuit unit for driving the load. An operation unit for outputting, a load switching unit that is opened / closed by the drive circuit unit and has a switching element that performs drive control of the load, and a voltage supply circuit that supplies a voltage to the operation unit when the load is driven. In the two-wire wiring device, the power supply circuit is connected to an output of the rectifier circuit unit, and a first switching element interposed in series on a line on the operation unit side, and the other side of the first switching element. A current limiting element, a power storage element having a charge charging function on the other side of the current limiting element, and a series connection between the connection point of the first switching element and the power storage element on a line on the operation unit side with respect to a connection point. The first 2, a voltage detection circuit that monitors a charging voltage value of the storage element and detects whether the charging voltage value has reached a preset voltage value, and receives a detection signal of the voltage detection circuit. A control unit that can switch between an open state and a closed state of the first and second switching elements, wherein the control unit is configured to, when a charging voltage value of the power storage element is equal to or less than a preset voltage value, to the first switching element. When the voltage value of the power storage element exceeds a preset voltage value, the first switching element is opened. A two-wire wiring device, wherein a circuit state and the second switching element are in a closed circuit state. 2. The power supply circuit is inserted between the other side of the second switching element and the operation unit, and converts a charge voltage of the power storage element to a voltage lower than the charge voltage to the operation unit. The two-wire wiring device according to claim 1, further comprising: a voltage conversion circuit that outputs the voltage. 3. The voltage conversion circuit is connected to a coil connected to the other side of the second switching element and serially interposed on a line on the operation unit side, and to a connection point between the second switching element and the coil. The two-wire wiring device according to claim 2, further comprising: a diode having an anode connected to a cathode and a ground side; and a capacitor having a positive electrode connected to a connection point between the coil and the operation unit. 4. A voltage conversion circuit comprising: a first diode having a primary side connected to a transformer on the other side of the second switching element and an anode connected to the secondary side; A cathode of a second diode is connected to the cathode side, a coil connected in series to a line on the operation unit side at a connection point thereof, and a capacitor connected to a positive electrode side at a connection point between the coil and the operation unit. The two-wire wiring device according to claim 2, comprising: