KR100513564B1 - Power on-off device - Google Patents

Abstract

The present invention relates to a power switch that is built in the outlet or the switch box to control the home appliance that is powered on / off as the outlet or switch installed on the wall is connected or operated, the power switch is a high voltage DC voltage supply unit for converting AC power into DC power of a predetermined level, a zero crossing detection unit for detecting a zero crossing point at which the polarity of the AC power is switched, and a control pulse generated at the zero crossing time point detected by the zero crossing detection unit. A controller for adjusting the time when the AC power is applied to the DC voltage supply unit and the time when the power of the home appliance is controlled on / off by modulating the width of the controller, and the on / off switching by the pulse width control of the controller. As it comprises a triac to open and close the power supply of the home appliance, The device can be miniaturized by supplying a low voltage DC power supply from a commercial AC power supply to a circuit without a separate battery.

Description

Power on-off device

The present invention relates to a power switching device for controlling the power or illuminance of a home appliance, and in particular, the outlet or the switch to control a home appliance that is powered on / off as the outlet or switch installed on a wall is connected or operated. The present invention relates to a power switching device built in a box.

Home network systems can be classified into various categories according to the type of network network on which they are based. First of all, the home network system can be classified into telephone line networking using telephone lines installed in most local homes, standard networking within an enterprise, and wireless networking using wireless communications. Can be.

Any home network system requires a predetermined communication / control device for transmitting and receiving signals depending on the type of network network such as LAN, telephone line, power line, and wireless network. The communication / control device is a kind of modem, and performs a relay function of receiving a control command transmitted through a network and transmitting it to a corresponding home appliance.

To this end, the communication / control device is directly embedded in a home appliance, or installed in an outlet or switch box for supplying power to the home appliance. According to the structure in which the communication / control device is installed, it can be classified into an outlet type and a switch type, which are illustrated in FIGS. 1 and 2, respectively. In addition, in order for the communication / control device to perform a relay function, a predetermined level of DC power is basically supplied into the circuit, which is performed by a DC power supply circuit forming the communication / control device.

First, FIG. 1 illustrates that the communication / control device is built in an outlet, and as shown, the outlet and the DC power supply 10 are connected in parallel, so that the power supplied to the load, that is, the home appliance D is connected. AC power is also applied to the DC power supply 10 without affecting. As a result, the control unit 20 performs power control of the home appliance D using the DC power supplied from the DC power supply unit 10.

However, when the communication / control device is mounted in the switch box formed on the wall as shown in Figure 2, the DC power supply 10 'has a structure that is connected in series with the load (electric appliance, D').

Therefore, a part of the AC power to be supplied for the operation of the home appliance (D ') is supplied to the DC power supply 10' of the communication / control device, the switch-type communication / control device due to the installation of the switch There is a problem that less power is applied to a device (eg, a lamp) that is powered on / off than when the communication device is not installed. Therefore, the operation of the control unit 20 for controlling the power of the home appliance by using the DC power supplied by the DC power supply 10 'has to be unstable.

If a separate battery is installed to supply a stable DC power supply for a communication / control device required for networking of a home appliance, the external volume of the communication / control device is increased so that it may be installed in the outlet or the switch box. There is also a problem that the battery replacement of the built-in device is also not easy.

The present invention has been made to solve the above problems of the prior art, the object is to overcome the structural problems connected to the home appliance in the communication device or control device mounted inside the wall outlet or switch box on the communication / The present invention provides a power supply switching device capable of safely supplying DC power to a control device and at the same time allowing the home appliance to operate normally and miniaturization using only minimal components.

Power switch device according to the present invention for solving the above problems in the power switch for on / off control of home appliances connected to the outlet, the power switch device converts a high voltage AC power to a predetermined level of DC power And a controller for issuing a control signal for controlling the on / off power of the home appliance connected to the outlet by using the DC voltage supply unit supplying the DC power to the apparatus, and the DC power supplied from the DC voltage supply unit. And a triac to open / close the power of the home appliance by switching on / off according to a control signal issued from the controller, and a choke coil to filter out noise due to the on / off switching operation of the triac. do.

In addition, in the power switch device embedded in the switch box connected in series with the home appliance for power control of the home appliance turned on / off by the operation of the switch formed on the wall surface, the power switch is a high voltage AC power supply A DC voltage supply unit for converting the DC power to a predetermined level, a zero crossing detection unit for detecting a zero crossing point at which the polarity of the AC power is switched, and a width of a control pulse generated at the zero crossing point detected by the zero crossing detection unit. A controller for adjusting a time when an AC power is applied to the DC voltage supply unit and a time when the power of the home appliance is controlled on / off by modulation (PWM), and the home appliance is switched on / off by pulse width control of the controller Characterized in that it comprises a triac to open and close the power supply of the device.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. 3 and 4 is a view showing the configuration of the home appliance communication / control device installed in the outlet or switch box of the present invention, Figure 3 is a power switch device that can be used in the communication / control device built in the outlet 4 is related to a DC power supply circuit that can be used in the power switch device embedded in the switch box.

In the present specification, the power switch is illustrated as being embedded in the outlet or the switch box, but the present invention is not limited thereto and specifies that the power switch is embedded in a narrow space.

First, the power switch for on / off control of the home appliance connected to the outlet of Figure 3 converts a high voltage AC power to a predetermined level of DC power, the DC voltage supply unit 100 for supplying the DC power into the circuit Is basically provided, the controller 200 for issuing a control signal for controlling the on / off power of the home appliance (D) connected to the outlet by using the DC power supplied from the DC voltage supply unit 100, A triac 300 is provided to open / close the power of the home appliance by switching on / off according to a control signal issued from the controller 200.

The triac 300 is an element that serves as an ultimate switch by receiving a control signal from the controller 200. The triac 300 is connected to a home appliance D connected through an outlet to turn on / off the power of the home appliance. To be off.

At this time, the power switch is located between the AC power and the triac 300, the choke coil 400 for filtering the noise of the AC power applied to the circuit or the on / off switching operation of the triac is applied to the circuit. It may be configured to include.

The power switching device further includes a varistor 500 that is connected in parallel with the AC power supply in order to protect an internal circuit element from overvoltage noise caused by thunder lightning, static electricity or sparks. The varistor 500 is a non-linear semiconductor resistance element whose resistance value decreases as the voltage across both ends is increased. Since the unwanted overvoltage is applied to both ends of the varistor, the varistor 500 can be prevented from being applied into the circuit.

The power switch is connected to the AC power in parallel to detect the overcurrent applied to the circuit, and if the overcurrent is detected overcurrent to turn off the triac 300 to turn off the power of the home appliance (D) connected to the outlet It is configured to include a detector 600.

In addition, the power switching device further includes a signal transmission unit 250 for transmitting a control signal issued from the controller 200 to the triac 300, the controller 200 to improve the stability of the circuit And a function of relaying a signal transmitted between the triac 300.

The DC power supply unit 100 smoothes the voltage down capacitor 110 for lowering the voltage level of the AC power supply, the bridge circuit 120 for rectifying the waveform passing through the voltage down capacitor, and the waveform passing through the bridge circuit. Is configured to include a smoothing unit 130, the DC power of a predetermined size passed through the smoothing unit 130 is used to drive the controller 200 and the triac 300.

The voltage-down capacitor 110 is a capacitor that serves to lower the voltage of 200 Vac or more to a certain level, the capacity of the capacitor is a specification of the controller 200 applied to the power switch and the home appliance (D) connected to the outlet The required DC voltage may vary depending on the power dissipated.

First, the voltage down capacitor 110 attenuates the voltage of 200Vac or more to AC power of about 10 to 20Vac, and the attenuated power waveform passes through a bridge circuit (Bridge rectifier) 120 using four diodes in the form of a bridge. It is full-wave rectified.

The smoothing unit 130 serves to generate a DC power by smoothing the power waveform passed through the bridge circuit 120 and to supply the DC power to the controller 200, and to prevent an overvoltage connected to the bridge circuit 120 once. A resistor 131, a zener diode 132 for outputting a waveform passing through the overvoltage protection resistor at a constant voltage, a regulator 134 for stably supplying a constant voltage / constant current, and a connection between the input terminal of the regulator and ground The capacitor 133 and the power storage capacitor 135 connecting the output terminal and the ground.

At this time, the zener diode 132 and the regulator 134 is selected in consideration of the magnitude of the DC voltage and the amount of current to be supplied into the circuit, and the power storage capacitor 135 also affects a small ripple. In consideration of the properties of the controller 200 that can be received it is preferable to select a large capacity for stability. Since the circuit constituting the smoothing unit 130 is a degree that can be easily derived by those skilled in the art, a detailed circuit diagram will be omitted.

Next, with reference to Figures 4 to 7 will be described a switch-type power switch that can be built in the switch box on the wall.

As pointed out in the conventional problem, a home appliance such as a lamp, an electronic curtain, and the like, of which power is opened and closed by a switch includes a power switch device in which an AC power is built in the switch box as the switch and the home appliance D 'are connected in series. There is a problem that each must be distributed to home appliances. That is, a part of AC power is supplied to the power switch, and most of the power must be distributed in such a manner as to be supplied to the home appliance.

Due to this structure, it can be seen that in the switch-type power switching circuit shown in FIG. 4, the connection state of the bridge circuit is different from the connection state of FIG. 3.

In more detail, the power switch device built in the switch box connected in series with the home appliance for power control of the home appliance (D ') which is turned on / off by the operation of the switch formed on the wall surface is a high voltage AC power supply. The DC voltage supply unit 100 ′ converting the DC power to a predetermined level is basically provided. The DC voltage supply part 100 'is connected differently from the outlet type of FIG. 3 by the connection structure of the switch type power switch.

The DC power supply unit 100 ′ includes a voltage down capacitor 110 ′ that lowers the voltage level of the AC power source, a bridge circuit 120 ′ that rectifies the waveform passing through the voltage down capacitor, and the bridge circuit. And a smoothing unit 130 'for smoothing a waveform. The bridge circuit 120' has one end connected to the voltage down capacitor 110 ', and the end facing the voltage down capacitor is connected to the triac. It is connected between the home appliances.

Briefly expressed in the case of the outlet type as shown in Figure 3 (|| means parallel,-means a serial relationship)

{AC power supply || home appliance-triac || voltage down capacitor-bridge circuit}

It has a structure such as, after all, the home appliance (D) and the DC voltage supply unit 100 had a parallel relationship.

However, in the structure as shown in FIG.

{AC power supply || electric appliance-(triac || voltage-down capacitor-bridge circuit)} and the home appliance (D ') and the DC voltage supply unit (100') has a series relationship.

That is, when the home appliance (D ') is in the off state, high voltage is applied to both ends of the triac 300, and the high voltage is also applied to the DC voltage supply unit 100 connected in parallel with the triac 300. Can be generated.

However, when the home appliance D 'is in an on state, since there is no voltage applied to the triac 300 and the DC voltage supply unit 100, a DC power source for operating the circuit cannot be generated. In order to solve this problem, the controller 200 'of the switch-type power switching device performs pulse width modulation (PWM), and for this purpose, a zero crossing detection unit detecting a zero crossing point at which the polarity of the AC power is switched. 150 is added.

As the AC waveform having a frequency of 60 Hz is rectified through the bridge circuit 120 ', the rectified AC waveform has a frequency of 120 Hz, and the zero crossing detection unit 150 passes through the bridge circuit 120'. It is connected to extract the zero crossing point of the AC waveform.

That is, the zero crossing detection unit 150 is for giving a signal for notifying the crossing point every 1/120 seconds to the controller of the power switching device. As one embodiment of the simplest zero crossing detection method, a variable resistor or two having an appropriate ratio may be used. You can think of how to configure the resistor to adjust or select the variable resistor or the ratio of the two resistors according to the controller's specification to lower the 10 ~ 20V amplitude to the appropriate voltage ripple to interrupt the interruption.

The controller 200 ′ modulates the width of the control pulse generated at the zero crossing point detected by the zero crossing detection unit 150 to adjust the width of the control pulse (PWM) and to supply the AC power to the DC voltage supply unit 100 ′. The time at which the power supply of the home appliance D 'is controlled on / off is adjusted.

In addition, the triac 300 connected to the controller 200 'is switched on / off by a control pulse of the controller so that the power of the home appliance D' is turned on / off. The triac 300 is preferably a component such as a photo triac so that a more stable and smooth switching operation is performed.

The control pulse issued by the controller 200 'is a pulse of 120 Hz, which is to open and close the triac 300 at a high speed by using a pulse width control method, and control the power supply of the home appliance D'. Of course, in the case of home appliances that are accompanied by the illumination control function, such as lighting, it is also possible to control the illumination.

Here, in the controller 200 of the outlet type power switch, only the power on / off control of the home appliance is performed. However, the control of the DC power supply is not performed, but the controller 200 'is used in the switch type structure. ) Performs a function for generating a DC power supply by generating a pulse signal by receiving a signal from the zero crossing detection unit 150 and the illumination control through the power on / off control, pulse width control of the home appliance.

5 shows a voltage waveform applied to the home appliance D 'by the pulse width control of the controller 200'. T1 is a section in which a voltage is applied to the home appliance, and T2 is a section in which a DC power supply unit 100 ′ connected in parallel with the power switching device, that is, the triac and the triac 300 is connected. Thus, the controller 200 'divides the AC waveform section passing through the bridge circuit 120' into T1 and T2 so that the AC power during the T2 section is applied to the DC power supply unit 100 '. Allow DC power to be supplied.

Thus, in order to apply power to the switch-type power switch, 100% of the total power waveform is not applied to the home appliance D ', but a predetermined T2 section must be guaranteed. Actually, the amount of current that the controller 200 'will use is a very small amount of power since the low DC voltage is only a few mA to several tens of mA. Therefore, even if the T2 section is very small, there is no problem in driving the power switch.

Therefore, the power switch device having the structure of the present invention can generate a DC power source without a separate battery, so that not only can control the home appliances, but also used in a communication / control device embedded in a narrow space such as a switch box Can be used efficiently.

Various devices as provided in the outlet type device may be additionally provided in order to secure the stability of the power switch. First, the power switch is formed by an on / off switching operation of the triac 300. And a choke coil 400 connected between the AC power supply and the triac 300 to filter out noise, and to protect the internal circuit elements from overvoltage noise caused by thunder lightning, static electricity or sparks. It may further comprise a varistor (varistor, 500) connected in parallel with the power supply.

In addition, the power switch is connected to the AC power in parallel to detect the over-current applied to the circuit, and if the over-current is detected, the over-current detection unit for turning off the triac 300 to turn off the power of the home appliance (D ') It may be configured to include a 600, and further comprises a signal transmission unit 250 for performing a relay function so that the control signal issued from the controller 200 'is stably transmitted to the triac 300. Can be.

Referring to the graph of FIG. 5 and FIG. 6, the illuminance is adjusted using the switch-type power supply switching circuit of the present invention as follows. Home appliances are exemplified by lighting.

The controller 200 ′ for performing the pulse width control may extend the time allocated to T1 (that is, the time when power is supplied to the home appliance) according to the control command input from the external input device. The method for extending the T1 section may be extended by a predetermined interval every time there is an operation of the external input device or a switch attached to a wall, or the T1 section may be continuously extended when continuously operated.

The controller 200 ′ turns on the lamp after the zero crossing point as detected by the zero crossing detection unit 150, and supplies AC power to the lamp during the T1 section (S1 and S2). When the T1 section is exceeded, AC power applied to the home appliance is cut off (S3, S4), and AC power is applied to the DC power supply unit of the power switch.

When the illuminance control command of the lighting device is input in the T1 section (S5), the illuminance is brightened by extending the T1 section through pulse width control (S6).

If the extended T1 section exceeds 1/120 sec, i.e., a period for generating a control pulse in the controller (S7), the T1 section is initialized and a new control operation is waited for (S8).

Referring to Figure 7 another embodiment of the switch-type power switch of the present invention will be described. Since the AC power is not 100% applied to the home appliance due to the structural problem of the switch type communication / control device, the power is shared with the DC power supply unit 100 ′ only during a very short period. For example, it has a structure in which a power supplement 700 is added to supplement the power applied to the DC power supply 100 '.

The power supply unit 700 is connected to one end of the triac 300 and the primary side so that supplementary power is supplied in the circuit, the home appliance (D ') and the other end of the primary side is connected, the secondary side is A transformer 710 is connected to the smoothing part 130 '.

The transformer 710 is an element capable of controlling an output voltage according to a winding ratio in which coils are wound on a primary side and a secondary side, and the controller 200 ′ is applied as an output of the secondary side is applied to the smoothing unit 130. Make sure supplementary power is supplied.

The power supply 700 includes a diode 720 connected to one end of the secondary side of the transformer 710 and an anode (+), and a capacitor 730 connected to the cathode (-) and the other end of the transformer secondary side of the transformer 710. ), And the capacitor is connected to the smoothing unit 130 '.

As described above, the switch-type power switch may allow AC power to be applied to the DC voltage supply unit 100 'during the T2 section by controlling the pulse width of the controller 200'. Allow supplementary power to be applied.

Of course, even in the pulse width control method, even if the T2 section of FIG. 4 is very short, power supply to the circuit system of the power switch device requiring only a small amount of power is not a problem, but as shown in FIG. In addition, additional power can be supplied to maintain the circuit system of the power switch more reliably.

As described above, the power switch device according to the present invention has been described with reference to the illustrated drawings, but the present invention is not limited by the embodiments and drawings disclosed herein, and may be applied within the scope of the technical idea.

The power switch device mounted inside the outlet or the switch box of the present invention configured as described above can supply DC power for device operation without a separate battery, and especially home appliances such as lights operated by a switch on a wall. The power can be turned on / off and illuminance using the power switch can be improved user convenience. In addition, the power switching device can be miniaturized such that it can be inserted into a small space with a minimum component and a small cost.

1 is a configuration diagram representing the extraction of DC power from the outlet type structure,

2 is a configuration diagram representing the extraction of the DC power supply in the switch type structure,

3 is a configuration diagram of an outlet type power switch;

4 is a configuration diagram of a switch type power switch;

5 is a voltage waveform across both home appliances and triacs in a switched power switch;

6 is a logic flowchart implemented in a controller in a switched power switch;

7 is a configuration diagram in which a power supplement is added to the switch-type power switch of FIG. 4.

<Explanation of symbols on main parts of the drawings>

100: DC voltage supply unit 200: controller

250: signaling unit 300: triac

400: choke coil 500: varistor

600: over current detection unit 700: power supply

Claims (14)

In the power switch for on / off control of home appliances connected to the outlet, The power switch is a home appliance connected to the outlet by using a DC voltage supply unit for converting a high voltage AC power into a predetermined level of DC power, and supplying the DC power to the device, and the DC power supplied from the DC voltage supply unit. A controller for issuing a control signal for controlling the power supply on / off, a triac for switching on / off the power of the home appliance by switching on / off according to the control signal issued from the controller, and an on / off switching operation of the triac Power switching device comprising a choke coil for filtering the noise by the. The method of claim 1, The power switch is characterized in that it further comprises a varistor (varistor) connected in parallel with the AC power in order to protect the elements inside the circuit from overvoltage noise caused by static electricity or sparks. The method of claim 1, The power switch is connected to the AC power in parallel to detect the over-current applied to the circuit, and if the over-current is configured to include an over-current detecting unit for turning off the triac so that the power of the home appliance connected to the outlet is turned off Power switch device characterized in that. The method of claim 1, The DC power supply unit includes a voltage down capacitor for lowering the voltage level of the AC power supply, a bridge circuit for rectifying the waveform passing through the voltage down capacitor, and a smoothing unit for smoothing the waveform passing through the bridge circuit. Power switchgear. The method of claim 1, The power switch device further comprises a signal transfer unit for transmitting the control signal issued from the controller to the triac. In the power switch device embedded in the switch box connected in series with the home appliances for power control of the home appliances turned on / off by the operation of the switch formed on the wall surface, The power switching device includes a DC voltage supply unit for converting a high voltage AC power into a DC power of a predetermined level, a zero crossing detection unit for detecting a zero crossing point at which the polarity of the AC power is switched, and a zero crossing detected by the zero crossing detection unit. A controller for adjusting the time when the AC power is applied to the DC voltage supply unit and the time when the power of the home appliance is controlled on / off by modulating the width of the control pulse generated at the time point, and the pulse width control of the controller Switching on / off by the power switch, characterized in that it comprises a triac to open and close the power supply of the home appliance. The method of claim 6, The power switch is characterized in that it comprises a choke coil for filtering the noise caused by the on / off switching operation of the triac. The method of claim 6, The power switch is characterized in that it further comprises a varistor (varistor) connected in parallel with the AC power in order to protect the elements inside the circuit from overvoltage noise caused by static electricity or sparks. The method of claim 6, The power switch is connected to the AC power in parallel to detect the over-current applied to the circuit, and if the over-current is configured to include an over-current detecting unit for turning off the triac so that the power of the home appliance connected to the outlet is turned off Power switch device characterized in that. The method of claim 6, The DC power supply unit includes a voltage down capacitor for lowering the voltage level of the AC power supply, a bridge circuit for rectifying the waveform passing through the voltage down capacitor, and a smoothing unit for smoothing the waveform passing through the bridge circuit. Power switchgear. The method of claim 6, The power switch device further comprises a signal transfer unit for transmitting the control signal issued from the controller to the triac. The method of claim 6, The power switch is connected to one end of the triac and the primary side is connected to the supplementary power supply in the circuit, the other end of the primary side is connected to the home appliance, the secondary side is a power supply having a transformer connected to the smoothing unit Power switch device characterized in that it further comprises. The method of claim 12, And a power supply unit including a diode connected to one end of the secondary side of the transformer and an anode (+), and a capacitor connected to the cathode of the diode and the other end of the transformer secondary side. . The method of claim 1, The power switching device further comprises a signal transmission unit for transmitting the pulse signal generated by the controller to the triac.