WO2011068322A2

WO2011068322A2 - Fire-preventing and power-saving intelligent multi-outlet

Info

Publication number: WO2011068322A2
Application number: PCT/KR2010/008317
Authority: WO
Inventors: 김귀로
Original assignee: 주식회사 중원파워컨트롤스
Priority date: 2009-12-01
Filing date: 2010-11-24
Publication date: 2011-06-09
Also published as: KR20110061047A; WO2011068322A3; KR101084109B1

Abstract

The present invention relates to a fire-preventing and power-saving intelligent multi-outlet, and more particularly, to a fire-preventing and power-saving intelligent multi-outlet which cuts off power from being supplied to electric devices upon the occurrence of a high temperature, an overcurrent, leakage, or overvoltage on the inside or outside of the multi-outlet, which prevents electrical accidents and fire which can be caused by said electrical accidents, which cuts off stand-by current and thus saves power loss, which displays the value of the current flowing through the multi-outlet and the internal and external temperatures of the multi-outlet to thus easily check the condition of the multi-outlet, and which minimizes power consumption of power-converting means for controlling the multi-outlet. For this purpose, the multi-outlet of the present invention comprises: a power plug (90) arranged so as to be connectable to the outlet connected to a commercial power source, to receive alternating current electricity; a plug socket (91) arranged so as to be connectable to the power plug (90) to supply alternating current electricity to the power plug (90); a power unit (50) which converts the alternating current electricity applied through the power plug (90) into direct current electricity of a preset voltage; a switch unit (30) including a stand-by current set switch (31) for selecting a stand-by current set mode and a regular mode switch (32) for switching a cut-off mode into a regular mode; an output unit (40) including a display part (41), a lamp (42), and a buzzer (43); a power switching unit (80) which is arranged in each of the plug sockets (91), and which has an input terminal connected to the power plug (90) and an output terminal connected to the plug socket (91) to selectively supply the alternating current electricity applied from the power plug (90) to the plug socket (91); an overvoltage protection unit (60) configured to absorb the alternating current electricity being applied thereto when the voltage of the alternating current electricity being applied from the power plug (90) exceeds a predetermined voltage level; a first thermal sensing unit (71) installed at the input terminal of each of the power switching units (80) to sense the temperature of the cable connected to the input terminal of the power switching unit (80); a second thermal sensing unit (74) which senses the temperature of the outside of the multi-outlet; a current-sensing unit (72) which is installed at the input terminal of each of the power switching units (80) to sense the current of the alternating current electricity being applied through the power plug (90), and which is set with a rated current of the multi-outlet; a second current-sensing unit (73) installed at the output terminal of each of the power switching units (80) to sense the stand-by current flowing through the plug socket (91); and a control unit (10) which controls the operation of the power switching unit (80) in accordance with signals output by the first and second thermal sensing units (71, 74) and by the first and second current-sensing units (72, 73).

Description

Power-saving intelligent multi-outlet for fire protection

The present invention relates to a power-saving intelligent multi-outlet for fire protection, and more particularly, to prevent failure of an electric device by cutting off power supplied to a load electric device in an internal and external high temperature, an overcurrent, a short circuit or an overvoltage state. It also prevents fires caused by electric accidents and electric accidents, cuts off standby current, reduces power loss, and visually displays the current value flowing through the multi-outlets and the internal and external temperatures of the multi-outlets. It can be easily confirmed, and relates to a power-saving intelligent multi-outlet for fire prevention to minimize the power consumption of the power conversion means for self-control.

According to the National Emergency Management Agency statistics, 35% of the fires in buildings are accounted for by electrical agents, and 70% of them are electrical fires due to overload or leakage of electric heating devices. There is an urgent need for measures to block the problem.

However, since the conventional multi-outlet is used in the form of connecting a plurality of electrical and electronic devices after connecting to the wall outlet or the system box embedded in the floor, the over-current exceeding the energizing current of the multi-outlet can flow Furthermore, the branched outlet or system box is divided into a plurality of plus sockets, so that the current flowing through the outlet or system box may exceed the rated current. Such overcurrent generates heat in the wire and may cause a short circuit accident by lowering the insulation strength of the wire sheath due to the heat generated.If an overcurrent persists, it may eventually be damaged due to deterioration of the wire sheath and cause an electric fire due to a short circuit accident. There might have been a problem.

In addition, since the conventional multi-outlet is used in a state exposed to the floor, there is a possibility that the fire may be damaged by heat when the fire occurs, there is also a problem that can be extended to an electrical accident due to short circuit of the internal wire due to the damage. .

In addition, the conventional multi-concentration, if you want to know the current supply current, there is a difficulty to calculate and check the capacity of the connected household appliances, if the current flows in the state that exceeds the rated current but does not need to cut off immediately, That is, in the case where current generally flows in the range of 100% to 120% of the rated current, there is a problem that leads to an accident because the situation cannot be informed even though a countermeasure must be taken.

On the other hand, in general, electrical and electronic devices using the remote control are in a standby state for receiving a transmission signal of the remote control even when the operation is stopped, so that even if the operation is stopped, it consumes a certain amount of power. If not, no-load power loss occurs in the internally mounted transformer, and itself consumes power even in the standby state for re-response, so that uninterrupted current of standby power flows through the multi-conductor to which such equipment is connected. Recently, various multi-outlets have been developed to block such standby power.

However, the multi-outlet that can cut off standby power supplies separate power to the control means that cuts off the standby power. In the conventional multi-outlet, there is a problem that standby power is consumed even in the power supply means. In other words, an unwanted power loss occurred even in the configuration itself to block standby power.

Therefore, at a time when the necessity of green growth and energy saving is emphasized recently, it is urgent to develop a power-saving multi-outlet that can solve the above problems.

Therefore, an object of the present invention, when the internal temperature of the multi-outlet or the external temperature of the multi-conductor reaches a dangerous temperature, it operates to prevent damage to the multi-outlet and secondary accident spread, and can cut off the electricity in response to overload, short circuit and overheating It is to provide a power saving intelligent multi-outlet for fire protection.

Another object of the present invention is to provide a power saving intelligent multi-outlet for fire prevention that can easily check the status information of the multi-outlet by using the multi-outlet itself, thereby facilitating management of the multi-outlet.

Still another object of the present invention is to provide a fire protection intelligent multi-conductor for preventing fire while minimizing power consumption by detecting standby current and minimizing power consumption.

In order to achieve the above object, the present invention provides a power plug 90 provided to be plugged into an outlet connected to a commercial power source and receiving AC electricity; A plurality of plug sockets 91 provided to plug the plugs and supplying alternating current to the plugs; A power supply unit 50 for converting AC electricity input through the power plug 90 into DC electricity of a predetermined voltage; A switch unit 30 including a standby current setting switch 31 for selecting the standby current setting mode, a constant mode switch 32 for switching to the normal mode when in the interruption mode state; An output unit 40 including a display unit 41, a lamp 42, and a buzzer 43; Each plug socket 91 is mounted one by one, and an input terminal is connected to the power plug 90 and an output terminal is connected to a plug socket 91 to connect AC electricity input from the power plug 90 to the plug socket 91. Opening and closing unit 80 to selectively supply; An overvoltage protection unit 60 configured to absorb the supplied AC electricity when the voltage of the AC electricity input from the power plug 90 exceeds a predetermined voltage; A first heat sensing unit 71 installed at an input end of each opening and closing portion 80 to sense a temperature of an electric wire connected to the input end of the opening and closing portion 80; A second heat sensing unit 74 sensing an external temperature; A first current sensing unit 72 installed at an input end of each opening and closing unit 80 to sense an electric current of an alternating current received through the power plug 90, and set the rated current value of the multi-outlet as the rated current value; ); A second current sensing unit 73 installed at an output end of each opening and closing unit 80 to sense a standby current flowing through the plug socket 91; The rated current value of the multi-outlet, the overcurrent threshold value used as the criterion for overcurrent, the standby current threshold value used as the criterion for standby current, the leakage current threshold value used as the criterion for leakage current, and the wire used as a criterion for overheating A memory 11 for storing an overheat threshold value, an external overheat threshold value that is a criterion for overheating the external temperature, and a timer 12 for obtaining elapsed time; Outputting a current value detected by the first current sensing unit 72 and a temperature value detected by the first heat sensing unit 71 and the second heat sensing unit 74 to the display unit 41; When the standby current setting mode is selected through the switch unit 30, the current value detected by the second current sensing unit 73 is stored as a standby current threshold value in the memory 11; In the continuous mode, a condition in which the current value detected by the first current detector 72 reaches the overcurrent threshold value, and the current value detected by the second current detector 73 continuously for a preset elapsed time. The condition that is less than or equal to the standby current threshold value, the condition that the temperature value detected by the first heat detector 71 reaches the wire overheat threshold value, the temperature value detected by the second heat detector 74 Switching to a shut-off mode by turning off the corresponding opening / closing unit 80 when any one of the conditions for reaching the external overheat threshold is achieved; And a control unit 10 which switches to the normal mode by closing the opening / closing unit 80 when the push signal of the normally mode switch 32 is input in the state of switching to the shut-off mode. do.

The first current detection unit 72 is configured to detect currents flowing through the two wires, and differentially amplify the detected currents to obtain a leakage current. The control unit 10 operates in the continuous mode. When the leakage current obtained by the first current detection unit 72 is greater than or equal to the leakage current threshold value, the switching unit 80 switches to the blocking mode by operating the switching unit 80, and when operating in the continuous mode, If the current value detected by the first current detection unit 72 is greater than the rated current value and lower than the overcurrent threshold value, the operation of the opening and closing unit 80 is interrupted after outputting a warning sound to the buzzer 43 for a preset time. It is characterized in that to switch to the blocking mode.

The power supply unit 50 includes: a rectifying unit 51 for full-wave rectifying the input AC electric current to convert it into direct current electric current and supplying it through a positive line (V +) having a positive potential and a grounded ground line (V0); A timer setting unit 52 configured to obtain a power supply of a voltage level to be input to a timer T1 from the direct current electricity, and to set a pulse period and a pulse width of a switching signal to be output from the timer T1; A timer (T1) for receiving power of the voltage level obtained by the timer setting unit (52) and outputting a switching signal at a set pulse period and pulse width; After being interrupted by the PNP type transistor Q4 via the reactance L1 to the direct current of the positive line V +, it is output through the collector of the transistor Q4, and the direct current of the positive line V + is applied to the base. The transistor Q3 is applied to the base of the transistor Q3 via the transistor Q2 which is turned on, and the transistor Q3 is turned on, and the base of the transistor Q4 is connected to the ground line through the transistor Q3 that is turned on. Configure a circuit to be connected to V0); The transistor Q1 is turned on by the positive pulse of the switching signal output from the timer T1 so that the base of the transistor Q2 is connected to the ground side so that the transistors Q2, Q3, and Q4 can be turned off. Circuit configuration; Switching unit 53 made; The voltage of electricity output through the collector of the transistor Q4 is divided into a plurality of resistors R10, R11, and VR4 to be applied to the base of the transistor Q6, and the plurality of resistors R10, R11, and VR4 are connected to the transistor Q4. An overvoltage interrupter 54 configured to select the transistor Q6 to be turned on when the collector voltage reaches a predetermined overvoltage, and to configure the base of the transistor Q3 to be connected to the ground line V0 by turning on the transistor Q6; And a smoothing part 56 including a capacitor C3 connected between the collector of the transistor Q4 and the ground line V0.

The transistor Q4 of the switching unit 53 includes: a variable resistor VR3 connected in parallel to the reactance L1 to draw a voltage signal divided by a variable resistor lead; A transistor Q5 having a base connected to the variable resistor lead of the variable resistor VR3, an emitter connected to a positive line (V +), and a collector connected to the base of the transistor Q4; It is characterized in that the overcurrent blocking unit 55, including a.

Therefore, the present invention configured as described above, the first and second

heat detection unit

71, 74 detects the electric wire temperature and the external temperature and shuts off the electricity supply when the dangerous water level is reached, the accident caused by overheating and secondary electricity It also prevents the spread of accidents, and can take steps to alarm and cut off according to the magnitude of the current, so that countermeasures can be taken, as well as to protect electrical equipment and wires connected through plugs.

In addition, the present invention outputs a current value, a wire temperature value, an external temperature value, and the like in a constant state, and thus has an advantage of easily checking the state of the multi-outlet.

In addition, the present invention, since the configuration for detecting the standby current and the configuration for detecting the constant current is provided separately, it is possible to obtain a more accurate sense current value by designing the configuration to match the size of the detection current, and also the leakage current By sensing, the operation corresponding to the magnitude of the current can also be performed without error.

In addition, the present invention is configured to minimize the power consumption of the power supply unit for supplying a direct current electricity to the internal control configuration, it is also possible to reduce the loss of standby power by the internal control configuration, especially when the power is cut off, that is, the switching unit ( 80) further reduces the power loss of the electric device by further minimizing the power loss, and also has the advantage of reducing the power consumption of the multi-conductor itself.

1 is a block diagram of a fire protection power saving intelligent multi-outlet in accordance with an embodiment of the present invention.

2 is an overvoltage protection unit 60, a first heat detection unit 71, a first current detection unit 72, and a second current detection unit 73 in a power saving intelligent multi-outlet for fire prevention according to an embodiment of the present invention. And a circuit diagram of the opening and closing portion 80.

Figure 3 is a top view of the fire protection power saving intelligent multi-outlet in accordance with an embodiment of the present invention.

Figure 4 is a block diagram showing a form of connecting a plurality of socket assembly (C) in the power saving intelligent multi-outlet for fire protection according to an embodiment of the present invention.

5 is a circuit diagram of a power supply unit 50 in a power saving intelligent multi-outlet for fire prevention according to an embodiment of the present invention.

10 control unit 11 memory 12 timer

20: communication unit 21: remote control signal receiver 22: short-range wireless communication unit

23: wired communication unit 30: switch unit 31: standby current setting switch

32: Normal mode switch 33: Reset switch 40: Output part

41 display unit 42 lamp 43 buzzer

50: power supply unit 51: rectification unit 52: timer setting unit

53: switching unit 54: overvoltage blocking unit 55: overcurrent blocking unit

56: smoothing

part

57a, 57b:

input terminal

58a, 58b: DC output terminal

60:

overvoltage protection unit

60a, 60b: surge absorber

71: First

thermal sensing unit

71a, 71b: Temperature sensing circuit 71c: Signal stabilization unit

72: first

current detection unit

72a, 72b: current conversion unit 72c: signal stabilization unit

73: second

current detection unit

73a, 73b: current conversion unit 73c: signal stabilization unit

74: second heat detection unit

80: opening and closing

part

80a, 80b: contact part 81: contact moving part

90: power plug 90A: power terminal

91: plug socket 91A: socket terminal

C: Socket Assembly

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described to be easily carried out by those of ordinary skill in the art. In the following description of the present invention, if it is determined that a detailed description of a related known function or known configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

1 is a block diagram of a fire protection power saving intelligent multi-outlet according to an embodiment of the present invention.

3 is a top view of a fire protection intelligent multi-outlet for preventing fire according to an embodiment of the present invention.

The power saving intelligent multi-outlet for fire prevention according to the present invention shown in Figures 1 to 3 is provided to be plugged into an outlet connected to a commercial power source, the power supply terminal to be supplied with AC electricity by contacting the terminal according to plugging into the outlet ( A power plug 90 having 90A); A plurality of plug sockets 91 provided to plug plugs of the electronic and electrical devices, and having a socket terminal 91A contacting the plug to be plugged; It is provided, and receives the alternating current through the power plug 90 and selectively supplies the alternating current to the electronic and electrical equipment through the plug socket (91).

In addition, the fire protection power saving intelligent multi-concentration according to the present invention, the control unit 10, the communication unit 20, the switch unit 30 to control the supply of AC electricity through the plug socket 91 and outputs the status information. And an output unit 40, a power supply unit 50, an overvoltage protection unit 60, various

signal detection units

71, 72, 73, and 74, and an opening and closing unit 80.

Here, the opening and closing portion 80, an input terminal electrically connected to the power plug 90, an output terminal electrically connected to the plug socket 91, and between the input terminal and the output terminal is selectively selected by the contact mover 80c. It is composed of contact portions (80a, 80b) to conduct the electrical power, and selectively supplies the alternating current received from the power plug 90 to the plug socket (91).

First, the operation mode of the control unit 10 will be described. The control unit 10 may operate in a continuous mode, a shutdown mode, and a standby current setting mode.

The constant mode monitors the voltage and current of an alternating current received through the power plug 90 and supplied to the plug socket 91 in a state in which the opening and closing unit 80 is closed (ON), and It monitors the temperature and the external temperature of the multi-outlet, and outputs the current value and the temperature value obtained during monitoring to the output unit 40. In addition, when any one of current and temperature deviates from a preset threshold value in the normal mode, the control unit 10 causes the opening / closing unit 80 to cut off (OFF operation, opening operation) to operate the plug socket 91. Switching to shut-off mode restricts the supply of electricity.

The blocking mode is a mode in which the opening and closing unit 80 is maintained in a blocking operation (off operation, opening operation), and electricity received through the power plug 90 is not supplied through the plug socket 91. Limit it to In addition, the control unit 10 receives a control signal to switch to the constant mode through the switch unit 30 or the communication unit 20 in the blocking mode state, or presses the reset switch 33 provided in the multi-outlet. When the input is initialized, it is switched to the normal mode.

The standby current setting mode is a standby current threshold value that is a breaking reference of the standby current, that is, a criterion for determining whether power supplied to an external electric device (not shown) through the plug socket 91 corresponds to standby power. This mode is to acquire and store the current value.

Hereinafter, the control unit 10, the communication unit 20, the switch unit 30, the output unit 40, the power supply unit 50, the overvoltage protection unit 60, and various

signal detection units

71, 72, 73, and 74 ) In detail.

The communication unit 20 receives a control signal for switching from the interruption mode to the normal mode, a control signal for initializing, a control signal for operating in the standby current setting mode, and transmits the control signal to the control unit 10. The communication unit 20 may include a remote control signal receiver 21 for receiving an infrared signal transmitted from a dedicated remote controller configured to communicate with the present invention or a remote control of a home appliance, and a short range wireless communication device implemented using Zigbee or RFID technology. Short range wireless communication unit 22 for receiving a control signal from, and may be configured to include any one or more of the wired communication unit 23 is connected to the external device by wire to receive the control signal.

The switch section 30 includes a standby current setting switch 31 for selecting the standby current setting mode, and a constant mode switch 32 for switching to the constant mode when in the interruption mode state. The standby current setting switch 31 may be configured as, for example, a two-stage switch capable of switching between 'normal' and 'power saving', wherein the control unit 10 includes the standby current setting switch 31. ) Is switched to 'normal' to store the current value detected by the second current sensing unit 73 as the standby current threshold value in the memory 11 as described below, and when the switch is to 'sleep' to operate in the constant mode. To start. The constant mode switch 32 may be configured in the form of a button. In this case, the control unit 10 switches to the constant mode when the constant mode switch 32 is pressed while operating in the blocking mode as described below.

The output unit 40 may include: a display unit 41 for visually viewing data values detected by the

various signal detectors

71, 72, 73, and 74, and a mode state currently in operation; A lamp 42 for informing that the alarm is on; And a buzzer 43 for notifying that the alarm is sounding, by the control unit 10.

The power supply unit 50 is electrically connected to the power plug 90 and receives AC electricity of commercial power, converts it into a preset DC electricity required by the present invention, and supplies the same. Preferably, since the output side of the power supply unit 50 is connected to the control unit 10 via the reset switch 33, when the reset switch 33 is pressed, the electricity supplied to the control unit 10 is temporarily interrupted and then restarted. Since the supply, the control unit 10 is initialized.

When the voltage of the alternating current electric power supplied from the power plug 90 exceeds a predetermined voltage, the overvoltage protection unit 60 absorbs the supplied electric power so that the electric power is not supplied to the plug socket 91. As shown in FIG. 2, the overvoltage protection unit 60 is a

surge absorber

60a or 60b which is drawn out from two terminals of the power plug 90 and installed on two wires connected to the opening and closing unit 80, respectively. : may be configured as a surge absorber and discharged to the ground side through the

surge absorbers

60a and 60b when electricity exceeding a predetermined voltage is input.

The

signal detectors

71, 72, 73, and 74 include a first heat detector 71, a second heat detector 74, a first current detector 72, and a second current detector 73. .

The first heat detection unit 71 detects a temperature of a wire connected to an input terminal of the opening and closing unit 80 and transmits the temperature to the control unit 10. As shown in FIG. 2, the first heat sensing unit 71 includes

temperature sensing circuits

71a and 71b respectively provided at two primary side wire strands of the opening and closing unit 80 to control the temperature of each wire strand. The temperature signal sensed by each of the

temperature sensing circuits

71a and 71b is stabilized by the signal stabilization unit 71c and transmitted to the control unit 10.

The second heat detection unit 74 detects the temperature of the outer front surface of the multi-outlet and transmits the temperature to the control unit 10.

As described above, the present invention detects the temperature of the electric wire electrically connected to the load electric device (not shown) through the plug socket 91 to cut off the electric supply when the electric wire is overheated. Since it can be configured, it is possible to prevent fire due to electric accidents as well as electrical accidents due to overheating of the wire.

In addition, the present invention, by detecting the external temperature of the multi-outlet by the second heat detection unit 74, when it is determined that the periphery of the multi-outlet rises to a high temperature to cut off the electricity supply electricity that can be generated by the breakage of the multi-outlet Prevent fires from accidents and electric accidents.

The first current detection unit 72 is a configuration for detecting a current supplied when the load electric device operates normally, that is, a constant current, and is proportional to the current value of the alternating current input through the power plug 90.

Current converters

72a and 72b for outputting current induced in the power supply side wires of the opening and closing unit 80, respectively, and the signal stabilization unit 72c outputs the induced currents output from the

current converters

72a and 72b. Using the converted to the stabilized voltage signal to each of the transfer to the control unit 10. In addition, the signal stabilizer 72c differentially amplifies the induced currents output from the

current converters

72a and 72b to obtain a leakage current signal and transmits the leakage current signal to the controller 10. Preferably, the first current detection unit 72 is set using the rated current value of the multi-outlet as the rated current value.

The second current sensing unit 73 is a configuration for sensing a standby current, a current conversion unit for outputting a current induced in proportion to the current of the alternating current supplied to the external device through the plug socket 91 ( 73a and 73b are respectively installed on the load side wires of the switching unit 80, and the induced currents output from the

current converters

73a and 73b are converted into stabilized voltage signals using the signal stabilizer 73c. Transfer to the control unit 10. Preferably, the second current detection unit 73 is configured in a circuit using the standby current threshold value, which is the breaking reference of the standby current, as the rated current value, and inputs the standby current threshold value in the standby current setting mode as described below. Since it is a variable value, it is possible to select the rated current value of the second current sensing unit 73 in the range of generally defined standby current threshold value.

Since the difference in the magnitude of the current to be sensed by the first current detector 72 and the second current detector 73 is very large, each of the current converters suitable for the magnitude of the current to be detected minimizes the error. It is preferable to configure the circuit of the signal stabilization unit in accordance with the magnitude of the sense current.

As described above, the present invention provides a current sensing unit which senses a current supplied through the plug socket 91 when the electric device (not shown) is in operation (rated operation), and when the electric device (not shown) does not operate. Since the current sensing unit for detecting the standby current supplied through the plug socket 91 is configured to be separated, the current flowing during the rated operation and the standby current and the leakage current flowing in the stopped state can be accurately obtained respectively. In other words, by installing a current converter in accordance with the current range to be detected, and by configuring a signal stabilizer accordingly to obtain a more accurate current value.

The control unit 10 includes a memory 11 for storing various preset values, a program suitable for each operation mode, a timer 12 for checking elapsed time and obtaining an elapsed time.

Here, the set value stored in the memory 11, the rated current value of the multi-outlet, which is a current that can be supplied to an external electric device through the plug socket 91; An overcurrent threshold which is a reference for determining whether the current supplied to the external electric device corresponds to the overcurrent; A standby current threshold which is a reference for determining whether a current supplied to the outside through the plug socket 91 corresponds to a standby current; A leakage current threshold value, which is a criterion for determining whether a short circuit occurs in a wire or an external electric device electrically connected through the plug socket 91; A wire overheat threshold value, which is a value determined according to an allowable temperature of the wire and serves as a criterion for determining whether the wire is in an overheat state; An external superheat threshold which is used as a criterion for determining whether the external temperature is in an overheat state; It is made, including. The standby current threshold value is a value obtained and stored in the standby current setting mode as described below, and the rated current value, the overcurrent threshold value, the leakage current threshold value, the wire overheat threshold value and the external overheat threshold value are set in advance. Preferably stored.

The controller 10 is configured to operate in a continuous mode, a shut-off mode and a standby current setting mode, and receives a selection of which mode to operate through the switch unit 30 or the communication unit 20, The current value detected by the first current detection unit 72 and the temperature value detected by the first heat detection unit 71 and the second heat detection unit 74 are output to the display unit 41.

First, the control unit 10 is initialized when the power is turned on or the power is supplied again by the reset switch 33, and at this time, it starts to control the components connected to it, and the opening and closing unit 80 is closed. (ON).

Next, when the standby current setting mode is selected, the controller 10 stores the current value detected by the second current sensing unit 73 as the standby current threshold value in the memory 11 and returns to the continuous mode. It is used as a judgment standard value to cut off standby current during operation.

Next, when the continuous mode is selected, the controller 10 may include the first heat sensing unit 71, the second heat sensing unit 74, the first current sensing unit 72, and the second current sensing unit 73. It is determined whether the opening / closing unit 80 is cut off (OFF) or closed (ON) according to the detection signal of the present invention.

That is, the controller 10 outputs a warning sound to the buzzer 43 when the current value detected by the first current detection unit 72 is greater than the rated current value and lower than the overcurrent threshold value. After turning on 42, the timer 12 starts to calculate the elapsed time and when the elapsed time reaches the preset time, the opening and closing unit 80 is switched off to switch to the blocking mode. For example, if the rated current value is set to 10A and the overcurrent threshold value is set to 12A which is 1.2 times the rated current value according to the allowable current of the multi-conductor and the wire, the detected current value is greater than 10A and less than 12A. At this time, the buzzer 43 and the lamp 42 are operated, and when this state lasts for a predetermined time, the electricity supply is cut off.

In addition, when the current value detected by the first current detecting unit 72 reaches the overcurrent threshold value, the controller 10 immediately switches off the opening and closing unit 80 to switch to the blocking mode. Here, the reason why the overcurrent is immediately interrupted by the flow of the current is to prevent the electric wires connected to the plug socket 91, the electric wires inside the multi-outlet, and the load electric equipment from being damaged by the electric current.

In addition, when the leakage current value detected by the first current detection unit 72 is greater than or equal to the leakage current threshold value, the controller 10 switches the switching unit 80 to a blocking mode.

In addition, when the current value detected by the second current sensing unit 73 becomes less than or equal to the standby current threshold value, the controller 10 starts checking the elapsed time with the timer 12. When the state less than or equal to the standby current threshold value lasts for a predetermined elapsed time, the switching unit 80 is switched to the blocking mode.

In addition, when the temperature value of the electric wire detected by the first heat sensing unit 71 reaches the electric wire overheat threshold, the control unit 10 switches the switching unit 80 to the blocking mode. Here, the wire overheat threshold may be set in advance in consideration of the allowable temperature of the coating of the insulated wire, which is generally connected to the multi-conductor, and accordingly set to about 80 ° C., the controller 10 increases the temperature value of the wire. By closing the opening and closing portion 80 when the temperature reaches 80 ° C., not only the coating of the insulated wire is damaged by heat, but also a short circuit accident due to the breaking of the coating can be prevented.

In addition, when the temperature value detected by the second heat sensing unit 74 reaches the external overheat threshold, the controller 10 switches the switching unit 80 to the blocking mode by blocking the opening and closing unit 80. The second heat detection unit 74 is configured to monitor the temperature of the external air of the multi-outlet to monitor whether the temperature of the air has risen due to a fire, etc. The present invention provides a power supply before the multi-outlet is damaged by the fire. It can be prevented from spreading by an electric accident by blocking. Here, the external superheat threshold value is a value that can be set according to the environment of the place where the present invention is installed, and if it is installed in a general room can be set to 45 ℃ in consideration of the usual room temperature, and usually like a boiler room Even if it is installed in a place higher than the normal room temperature is preferably set greater than 45 ℃.

In this way, when switching to the cutoff mode in response to an increase in current or temperature, or a standby current state, the opening and closing portion 80 is in an open (OFF) state.

Next, when the control unit 10 receives the push signal of the constant mode switch 32 in the state of switching from the normal mode to the interruption mode as described above, the control unit 10 turns on the opening and closing unit 80 to the normal mode. Switch. In addition, the controller 10 may switch to the constant mode according to the input of the reset switch 33 or the mode conversion control signal transmitted through the communication unit 20.

On the other hand, since the multi-outlet according to the present invention includes a plurality of plug sockets 91, it is preferable to control the electricity supply through each plug socket 91 for each plug socket 91.

To this end, the multi-concentration according to the present invention, as shown in Figure 1, the first heat detection unit 71, the first current detection unit 72, the opening and closing unit 80, the second current detection unit 73 and With the plug socket 91 as one socket assembly C, a plurality of socket assemblies C are provided.

FIG. 4 is a block diagram illustrating a form in which a plurality of socket assemblies C are connected in a power saving intelligent multi-outlet for fire prevention according to an embodiment of the present invention.

Referring to FIG. 4, a common connection point 61 is provided on the secondary side of the overvoltage protection unit 60, and a plurality of branch lines branched in parallel from the common connection point 61 are drawn out, and each socket assembly C is provided. It can be seen that is configured in the form of electrically connecting one to the branch line. At this time, the secondary common connection point 61 of the overvoltage protection unit 60 is preferably formed in a busbar shape.

The controller 10 may include an opening and closing unit corresponding to the detection signals of the first heat sensing unit 71, the first current sensing unit 72, and the second current sensing unit 73 provided in each socket assembly C. FIG. It is to control the opening and closing operation of 80.

Preferably, as shown in FIG. 4, another socket assembly C ′ including the first heat sensing unit 71, the first current sensing unit 72, the opening and closing unit 80, and the plug socket 92 may also be formed. Can be installed additionally. At this time, the additional socket assembly (C ') is not provided with a second current sensing unit 73 for detecting the standby current, and can not block the standby current, so that plugging in the electrical equipment that does not need to block the standby current It can be.

On the other hand, the control unit 10, if the sum of the current value detected in each socket assembly (C, C ') exceeds the total rated current of the multi-outlet, the control unit 10 to open and close the opening portion 80 of each socket assembly (C, C') At the same time, it is preferable to be configured to be able to perform a function such as blocking at the same time, or selectively blocking only the opening / closing part 80 of the socket assemblies C and C 'having the maximum current value.

5 is a circuit diagram of the power supply unit 50 in the power saving intelligent multi-outlet for fire prevention according to an embodiment of the present invention.

Referring to FIG. 5, the power supply unit 50 according to the embodiment of the present invention receives the AC electricity of the commercial power supply through the

input terminals

57a and 57b electrically connected to the power plug 90, and rectifies the DC power. Rectifying unit 51 to be; A timer setting unit 52 for setting a power level, a pulse period, and a pulse width of the timer T1 provided in the switching unit 53; A switching unit (53) for generating a switching signal according to the pulse period and pulse width set by the timer setting unit (52), and intermittently outputting the supplied rectified DC electricity according to the switching signal; An overvoltage blocking unit 54 coupled to an output side of the switching unit 53 to detect an overvoltage, and when an overvoltage is detected, an overvoltage detection signal is fed back to the switching unit 53 to cut off the supply of DC electricity; An overcurrent cut-off unit 55 coupled to an output side of the switching unit 53 to detect an overcurrent, and limiting a DC electric supply of the switching unit 53 according to the detected overcurrent signal when an overcurrent is detected; A smoothing unit 56 connected in parallel to the output side of the switching unit 53 so as to smooth the direct current to be supplied to be output through the direct

current output terminals

58a and 58b; It is configured to include.

A detailed description with reference to the circuit shown in FIG. 5 is as follows.

The rectifier 51 is a bridge rectifier circuit composed of four diodes D1, D2, D3, and D4. The rectifier 51 converts AC electricity of a commercial power source received through the

input terminals

57a and 57b into full-wave rectification. do. The DC electricity thus obtained is applied to both ends of the anode line (V +) and the ground line (V0) of the switching unit 53, the anode line (V +) is positive (+) by the full-wave rectified DC electricity Has a potential, and the ground line V0 is grounded and thus has a potential of zero.

The timer setting unit 52 includes two resistors R1 and R2, two capacitors C1 and C2, one zener diode Z1, two diodes D4 and D6, and two variable resistors ( VR1, VR2). The resistor R1 is connected in series to the Zener diode Z1 and the capacitor C1 connected in parallel, and is connected in parallel between the anode line V + and the ground line V0 in the form of connecting the resistor R1 to the anode line V +. The voltage at both ends of the capacitor C1 is supplied to the timer T1 of the switching unit 52. The resistor R1 and the zener diode Z1 prevent the overvoltage from flowing into the timer T1 while setting the voltage level of the timer T1, and the capacitor C1 smoothes the electricity supplied from the positive line V + to generate a timer. To T1).

In addition, the resistor R2 and the variable resistor VR1 are connected in series so that the resistor R2 is connected to the positive line (V +) and connected in parallel to the two lines (V +, V0), and the variable resistor lead end of the variable resistor VR1 is the diode D5. The capacitor C2 is connected to the capacitor C2 via V, directly connected to the timer T1, and divided by the variable resistor VR2 and applied to the timer T1.

In this manner, when the rectified wave rectified to the capacitor C2 is supplied for a predetermined time through the resistor R2 and the variable resistor VR1, and a certain amount or more of the charge is charged to the capacitor C2, the control signal is input to the timer T1 through the variable resistor VR2. In this case, the timer T1 outputs a pulse signal for turning on the transistor Q1 via the resistor R3 and the diode D7. Next, the timer T1 repeats the process of discharging the capacitor C2 and then recharging it. The RC constant set to the resistor R1, the variable resistor VR1 and the capacitor C2 determines the pulse period and pulse width of the switching signal output from the timer T1. On the other hand, since the charge and discharge time intervals are determined according to the voltage of electricity supplied from the variable resistor VR1, the capacitor C2 has a pulse period and a pulse width of the timer T1 for setting the magnitude of the voltage divided by the variable resistor VR1. It should be adjusted accordingly.

The switching unit 53 includes a timer T1, four transistors Q1, Q2, Q3 and Q4, one diode D7, and seven resistors R3, R4, R5, R6, R7, R8, and R9. The circuit is composed of one inductance L1. The output terminal of the timer T1 outputting the switching signal according to the RC constant set in the timer setting unit 52 is connected to the base of the NPN type transistor Q1 via the resistor R3 and the diode D7, where the emitter of the transistor Q1 is It is connected to the ground line and the collector is connected to the anode line (V +) via resistor R4. In addition, the collector of the transistor Q1 is connected to the base of the NPN type transistor Q2 via the resistor R5, where the collector of the transistor Q2 is connected to the anode line (V +) and the emitter is connected to the base of the NPN type transistor Q3 via the resistor R6. Connected to the base. In addition, the transistor Q3 is connected to the ground line and the collector is connected to the base of the PNP type transistor Q4 via the resistor R7. The emitter of the transistor Q4 is connected to the anode line V + via an inductance L1, and the collector is connected to the ground line via resistors R8 and R9. In addition, the collector of the transistor Q4 is connected to the DC output terminal 58a. Here, the inductance L1 removes the ripple of the full-wave rectified DC electric.

The switching unit 53 configured as described above outputs the direct current electric current interrupted by the switching signal of the timer T1 through the collector of the transistor Q4.

The path in which electricity is supplied to the DC output terminal 58a by the switching unit 53 is as follows.

The direct current electric current applied to the anode line V + by the rectifier 51 is applied to the base of the transistor Q2 via the resistors R4 and R5 to turn on the transistor Q2, and by turning on the transistor Q2, the collector of the transistor Q2 and Transistor Q3 is also turned on because it is also applied to the base of transistor Q3 via the emitter and via resistor R6. As the transistor Q3 is turned on in this manner, a voltage is applied between the base of the transistor Q4 connected to the collector of the transistor Q3 via the resistor R7 and the emitter of the transistor Q4 connected to the anode line V + via the inductance L1, thereby providing a transistor. Q4 is also turned on. Therefore, the direct current electric current of the voltage of the collector of transistor Q4, that is, the voltage across the resistors R8 and R9 connected in series, is applied to the direct

current outputs

58a and 58b.

On the other hand, when the switching signal, which is a positive pulse signal, is output from the timer T1, the switching signal is applied to the base of the transistor Q1 via the resistor R3 and the diode D7, so that the transistor Q1 is turned on. When the transistor Q1 is turned on in this manner, the collector and emitter of the transistor Q1 are electrically conducted so that the potential of the base of the transistor Q2 becomes the potential of the ground line V0, so that the transistor Q2 is turned off and the transistors Q3 and Q4 are also turned on. Is turned off. Thus, the supply of electricity through the collector of transistor Q4 is cut off.

The overvoltage interrupter 54 is composed of two resistors R10 and R11, one variable resistor VR4 and one NPN type transistor Q6. The variable resistor VR4 is arranged in such a way that the variable resistor withdrawal terminal is connected to the positive side of the resistor R9 among the resistors R8 and R9 of the switching unit 53 and the ground line V0 is connected via the resistor R11. ) And divides the voltage applied to the resistor R9 by the voltage of the resistor R11. In addition, the voltage applied to the resistor R11 is connected to be applied to the base of the NPN type transistor Q6 via the resistor R10, where the emitter of the transistor Q6 is connected to the ground line V0 and the collector is transistor Q3 of the switching unit 53. Is connected to the base of the That is, the overvoltage blocking unit 54 is configured to detect the overvoltage from the resistor R9 for dividing the output voltage of the switching unit 53, divide the detected voltage back into the variable resistor VR4 and the resistor 11, and turn on the transistor Q6. Here, the variable resistor VR4 is configured to adjust the voltage value between the base and the emitter required to turn on the transistor Q6.

Therefore, when the DC electric current output from the switching unit 53 rises to the overvoltage, the overvoltage blocking unit 54 turns on the transistor Q6 to turn off the transistor Q3 of the switching unit 53, and eventually the transistor Q4. It is also turned off so that DC electricity cannot be supplied to the DC output terminal 58a.

Here, the transistor Q3 of the switching unit 53 is configured to couple the overvoltage blocking unit 54. If the overvoltage blocking unit 54 is not coupled to the switching unit 53, the collector of the transistor Q2 is converted into a transistor. It can be configured by connecting to the base of Q4.

In addition, the overvoltage blocking unit 54 is configured to receive the voltages of the

DC output terminals

58a and 58b as the voltages of the resistors R9 divided by the resistors R8 and R9 connected in series, but the voltages of the

DC output terminals

58a and 58b are received. It may be configured to receive directly, in this case, the resistance value of the variable resistors VR4 and R11 is configured as an element having an appropriate value corresponding to the voltage values of the output terminals (58a, 58b).

The overcurrent interruption section 55 is constituted of a circuit with variable resistance VR3 and a PNP type transistor Q5. The variable resistor VR3 is connected in parallel to the inductance L1 of the switching unit 53, the variable resistor lead terminal is connected to the base of the transistor Q5, the emitter of the transistor Q5 is connected to the anode line V +, and the collector is the switching unit. Is connected to the base of transistor Q4 of 53.

That is, the overcurrent blocking unit 55 branches the current output through the switching unit 53 to the variable resistor VR3 connected in parallel to the inductance L1 and turns on the transistor Q5 using the branched current value as a voltage signal. do.

Therefore, when the output current of the switching unit 53 increases and the transistor Q5 is turned on, the voltage of the positive line V + is applied to the base of the PNP type transistor Q4, and eventually the transistor Q4 is turned off to the DC output terminal 58a. DC electricity cannot be supplied.

The smoothing unit 56 is composed of a condenser C3 connected in parallel to both ends of the

DC output terminals

58a and 58b of the switching unit 53 to smooth the electricity intermittently outputted through the collector of transistor Q4 to output the DC output terminal. To be supplied to (58a, 58b).

According to the present invention, since the smoothing unit 56 is connected in series with the transistor Q4 and connected to the ground line V0, when there is no power consumption in the load connected to the

output terminals

58a and 58b, the capacitor C3 is Since it is not discharged and maintains a charged state, even when the transistor Q4 is turned on in this state, no current flows or only a small current flows, thereby reducing power consumption.

As described above, the power supply unit 50 according to the present invention supplies electricity having a voltage required by the control unit 10, but does not use a transformer, instead of converting full-wave rectified DC electricity into the switching unit 53. After smoothing to and smoothed to supply electricity of the desired voltage to the control unit 10, to minimize the power consumption by reducing the power waste caused by the use of the transformer. In particular, the power required in the state in which the switching unit 80 is cut off (that is, in the blocking mode) has a low value. The present invention does not use a transformer having a large power consumption at light load or no load. In addition, the smoothing unit 56 arranged in parallel at the

output terminals

58a and 58b can be connected in series with the transistor Q4 for switching operation to further reduce power consumption.

Although illustrated and described in the specific embodiments to illustrate the technical spirit of the present invention, the present invention is not limited to the same configuration and operation as the specific embodiment as described above, within the limits that various modifications do not depart from the scope of the invention It can be carried out in. Therefore, such modifications should also be regarded as belonging to the scope of the present invention, and the scope of the present invention should be determined by the claims below.

Claims

A power plug 90 provided to be plugged into an outlet connected to commercial power and receiving AC electricity;

A plurality of plug sockets 91 provided to plug the plugs and supplying alternating current to the plugs;

A power supply unit 50 for converting AC electricity input through the power plug 90 into DC electricity of a predetermined voltage;

A switch unit 30 including a standby current setting switch 31 for selecting the standby current setting mode, a constant mode switch 32 for switching to the normal mode when in the interruption mode state;

An output unit 40 including a display unit 41, a lamp 42, and a buzzer 43;

Each plug socket 91 is mounted one by one, and an input terminal is connected to the power plug 90 and an output terminal is connected to a plug socket 91 to connect AC electricity input from the power plug 90 to the plug socket 91. Opening and closing unit 80 to selectively supply;

An overvoltage protection unit 60 configured to absorb the supplied AC electricity when the voltage of the AC electricity input from the power plug 90 exceeds a predetermined voltage;

A first heat sensing unit 71 installed at an input end of each opening and closing portion 80 to sense a temperature of an electric wire connected to the input end of the opening and closing portion 80;

A second heat sensing unit 74 sensing an external temperature;

A first current sensing unit 72 installed at an input end of each opening and closing unit 80 to sense an electric current of an alternating current received through the power plug 90, and set the rated current value of the multi-outlet as the rated current value; );

A second current sensing unit 73 installed at an output end of each opening and closing unit 80 to sense a standby current flowing through the plug socket 91;

The rated current value of the multi-outlet, the overcurrent threshold value used as the criterion for overcurrent, the standby current threshold value used as the criterion for standby current, the leakage current threshold value used as the criterion for leakage current, and the wire used as a criterion for overheating A memory 11 for storing an overheat threshold value, an external overheat threshold value that is a criterion for overheating the external temperature, and a timer 12 for obtaining elapsed time; Outputting a current value detected by the first current sensing unit 72 and a temperature value detected by the first heat sensing unit 71 and the second heat sensing unit 74 to the display unit 41; When the standby current setting mode is selected through the switch unit 30, the current value detected by the second current sensing unit 73 is stored as a standby current threshold value in the memory 11; In the continuous mode, a condition in which the current value detected by the first current detector 72 reaches the overcurrent threshold value, and the current value detected by the second current detector 73 continuously for a preset elapsed time. The condition that is less than or equal to the standby current threshold value, the condition that the temperature value detected by the first heat detector 71 reaches the wire overheat threshold value, the temperature value detected by the second heat detector 74 Switching to a shut-off mode by turning off the corresponding opening / closing unit 80 when any one of the conditions for reaching the external overheat threshold is achieved; A control unit (10) which switches to the normal mode by closing the opening / closing unit (80) when the push signal of the normally mode switch (32) is input in the state of switching to the blocking mode;

Fire protection intelligent multi-outlet, characterized in that configured to include.
The method of claim 1,

The first current detection unit 72,

It is configured to detect the current flowing through each of the two wires, and differentially amplify the detected current to obtain a leakage current.

The control unit 10,

When operating in the normal mode, if the leakage current obtained by the first current detection unit 72 is greater than or equal to the leakage current threshold value, the operation unit 80 is switched off to switch to the blocking mode,

When operating in the normal mode, if the current value detected by the first current detection unit 72 is greater than the rated current value and lower than the overcurrent threshold value, the alarm sound is output to the buzzer 43 for a preset time. Power saving intelligent multi-outlet for fire, characterized in that to switch to the cut-off mode by blocking the opening and closing part 80 after.
The method of claim 2,

The power supply unit 50,

A rectifying unit 51 converting the received AC electricity into a full-wave rectifier and converting the received AC electricity through a positive line V + having a positive potential and a grounded ground line V0;

A timer setting unit 52 configured to obtain a power supply of a voltage level to be input to a timer T1 from the direct current electricity, and to set a pulse period and a pulse width of a switching signal to be output from the timer T1;

A timer (T1) for receiving power of the voltage level obtained by the timer setting unit (52) and outputting a switching signal at a set pulse period and pulse width; After being interrupted by the PNP type transistor Q4 via the reactance L1 to the direct current of the positive line V +, it is output through the collector of the transistor Q4, and the direct current of the positive line V + is applied to the base. The transistor Q3 is applied to the base of the transistor Q3 via the transistor Q2 which is turned on, and the transistor Q3 is turned on, and the base of the transistor Q4 is connected to the ground line through the transistor Q3 that is turned on. Configure a circuit to be connected to V0); The transistor Q1 is turned on by the positive pulse of the switching signal output from the timer T1 so that the base of the transistor Q2 is connected to the ground side so that the transistors Q2, Q3, and Q4 can be turned off. Circuit configuration; Switching unit 53 made;

The voltage of electricity output through the collector of the transistor Q4 is divided into a plurality of resistors R10, R11, and VR4 to be applied to the base of the transistor Q6, and the plurality of resistors R10, R11, and VR4 are connected to the transistor Q4. An overvoltage interrupter 54 configured to select the transistor Q6 to be turned on when the collector voltage reaches a predetermined overvoltage, and to configure the base of the transistor Q3 to be connected to the ground line V0 by turning on the transistor Q6;

A smoothing part 56 including a capacitor C3 connected between the collector of the transistor Q4 and the ground line V0;

Fire protection intelligent multi-outlet, characterized in that configured to include.
The method of claim 3, wherein

In transistor Q4 of the switching section 53,

A variable resistor VR3 connected in parallel with the reactance L1 to draw a divided voltage signal through a variable resistor lead; A transistor Q5 having a base connected to the variable resistor lead of the variable resistor VR3, an emitter connected to a positive line (V +), and a collector connected to the base of the transistor Q4; An overcurrent blocking unit 55 including a;

Power saving intelligent multi-outlet for fire, characterized in that the connection.