KR100929818B1 - Power-saving intelligent purchase outlet for fire prevention - Google Patents

Abstract

The present invention relates to a power-saving intelligent embedded outlet for fire prevention, and more particularly, to prevent failure of the electrical device by cutting off the power supplied to the load electrical device in a high temperature, overcurrent, short circuit, overvoltage state inside and outside the embedded outlet. In addition, it prevents fires caused by electrical accidents and accidents, cuts off standby current, reduces power loss, and visually displays the current value flowing through the outlet and the internal and external temperatures of the outlet. The present invention relates to a fire prevention intelligent power outlet for fire prevention that can easily check the state of and minimize the power consumption of the power conversion means for self-control.

The present invention for this purpose, the power supply terminal (90A) for receiving AC electricity from a commercial power source; A water terminal 90B for supplying AC electricity to a plug terminal; A power supply unit 50 for converting AC electricity 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; By connecting an input terminal to the power terminal 90A with a wire and an output terminal to the water terminal 90B with a wire, selectively supplying AC electricity input from the power terminal 90A to the water terminal 90B. Opening and closing portion 80; An overvoltage protection unit 60 for absorbing alternating current exceeding a predetermined voltage; A first heat sensing unit 71 sensing a temperature of a wire connected to an input terminal of the opening and closing unit 80; A second heat sensing unit 74 sensing an external temperature; A first current sensing unit 72 configured to sense an electric current of an alternating current received through the power terminal 90A, and set the rated current value of the embedded outlet as a rated current value; A second current sensing unit 73 sensing a standby current flowing through the water terminal 90B; Stores the rated outlet current value, overcurrent threshold value, standby current threshold value, leakage current threshold value, wire overheat threshold value and external overheat threshold value, and outputs the detected current value and temperature value to the display unit 41. In the standby current setting mode, the current value sensed by the second current sensing unit 73 is stored as a standby current threshold value, and in the constant mode, a condition in which the current value reaches the overcurrent threshold value, the current value is If any one of the conditions that is less than or equal to the standby current threshold value, the condition that the temperature value of the wire reaches the wire overheat threshold value, the condition that the external temperature value reaches the external superheat threshold value, Switching the switching unit 80 to a blocking operation (OFF) to switch to a blocking mode; And a control unit 10 which switches to the normal mode by turning on the opening / closing unit 80 when the push signal of the regular mode switch 32 is input in the state of switching to the cutoff mode.

Description

Power saving intelligent purchase outlet for fire prevention {POWER SAVING PLUG SOCKET FOR FIRE PREVENTION}

The present invention relates to a power-saving intelligent embedded outlet for fire prevention, and more particularly, to prevent failure of the electrical device by cutting off the power supplied to the load electrical device in a high temperature, overcurrent, short circuit, overvoltage state inside and outside the embedded outlet. In addition, it prevents fires caused by electrical accidents and accidents, cuts off standby current, reduces power loss, and visually displays the current value flowing through the outlet and the internal and external temperatures of the outlet. The present invention relates to a fire prevention intelligent power outlet for fire prevention that can easily check the state of and 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, in general, the conventional outlets installed in homes and offices are used in the form of connecting a plurality of electrical and electronic devices to the power strips after connecting the power strips, so that there is a risk that an overcurrent exceeding the static current of the power outlets flows. 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 particular, the recessed outlet is embedded inside the wall and only exposed to the outside of the wall can be plugged in, so it is not possible to check the state of the inner part that is buried and invisible, and overload or overheating Even if the condition was damaged enough to worry, there was a problem that can not be timely recognized and prepared for.

In addition, the conventional outlet has a problem that may be damaged by the heat caused by the fire in the event of a fire, there is also a problem that can be extended to an electrical accident due to the short circuit of the internal wire due to the damage.

In addition, conventional buried outlets do not know the current information, such as the current supplied through the buried outlet, the temperature that can determine the overheating of the wire, so if you want to know such a buried outlet with the wire and cord connected There was a difficulty to take out and measure with a current meter and thermometer, etc., and when there is a current that exceeds the rated current but does not need to be cut off immediately, that is, current flows in the range of 100% to 120% of the rated current. If there was a problem, even if the countermeasures had to be taken, there was a problem leading to an accident.

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 unwanted outlets of standby power continue to flow into the plug-in outlet to which such equipment is connected.

Recently, various embedded outlets have been developed to cut off such standby power.

However, the purchase outlet that can block standby power is to supply a separate power to the control means for blocking the standby power, the conventional outlet has a problem that the standby power is consumed even in such a 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 type outlet that can solve the above problems.

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

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

Still another object of the present invention is to provide a fire protection intelligent power outlet for preventing fire by minimizing power consumption by sensing standby current and blocking the standby current.

In order to achieve the above object, the present invention provides a power supply terminal (90A) connected to a wire that is energized by a commercial power source to receive AC electricity; A water supply terminal 90B provided to be in contact with the plug terminal and supplying AC electricity to the plug terminal being in contact; A power supply unit 50 for converting AC electricity input from the power supply terminal 90A 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; By connecting an input terminal to the power terminal 90A with a wire and an output terminal to the water terminal 90B with a wire, selectively supplying AC electricity input from the power terminal 90A to the water terminal 90B. Opening and closing portion 80; An overvoltage protection unit 60 configured to absorb the supplied AC electricity when the voltage of the AC electricity input from the power terminal 90A exceeds a predetermined voltage; A first heat sensing unit 71 sensing a temperature of a wire connected to an input terminal of the opening and closing unit 80; A second heat sensing unit 74 sensing an external temperature; A first current sensing unit 72 configured to sense an electric current of an alternating current received through the power terminal 90A, and set the rated current value of the embedded outlet as a rated current value; A second current sensing unit 73 sensing a standby current flowing through the water terminal 90B; The rated current value of the plug-in outlet, the overcurrent threshold value for judging overcurrent, the standby current threshold value for judging standby current, the leakage current threshold value for judging leakage, the wire for judging 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 smaller 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, and the temperature value detected by the second heat detector 74 Switching to the shut-off mode by turning off the 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 current flowing through each of the two wires, and differentially amplify the detected current to obtain a leakage current, thereby controlling the detected current value and the leakage current value. Characterized in that delivered to.

In addition, the controller 10 may block the opening / closing unit 80 when the leakage current obtained by the first current detecting unit 72 is greater than or equal to the leakage current threshold value when operating in the constant mode. When switching to the cutoff mode and operating in the continuous mode, if the current value detected by the first current detecting unit 72 is greater than the rated current value and lower than the overcurrent threshold value, the buzzer ( 43) after the warning sound is output, the switching unit 80 is characterized in that switching 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; A smoothing part 56 including a capacitor C3 connected between the collector of the transistor Q4 and the ground line V0; Characterized in that configured to include.

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 embedded 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) has the advantage of further minimizing the power loss when the operation is cut off to cut off the standby power of the electrical equipment and to reduce the power consumption of the outlet itself.

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 intelligent power outlet for fire protection according to 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 fire protection intelligent embedded outlet for fire protection according to an embodiment of the present invention. And a circuit diagram of the opening and closing portion 80.

3 is a perspective view (a) and a front view (b) of a fire protection smart power outlet according to an embodiment of the present invention.

The power saving intelligent embedded outlet for fire prevention shown in FIG. 1 includes: a power supply terminal 90A connected to a wire through which commercial AC electricity flows and is supplied with electricity through a commercial power source; A male terminal 90B provided to be in contact with the terminal of the plug which is plugged into the male tool 91 and supplying electric power to the terminal of the plug being in contact; Comprising an input terminal and an output terminal, consisting of contact portions (80a, 80b) to selectively conduct between the input terminal and the output terminal by the contact movable portion (80c), the input terminal is connected to the power supply terminal (90A) by a wire and the output terminal is An opening / closing unit (80) for selectively supplying AC electricity input from the power supply terminal (90A) to the water terminal (90B) by connecting to a water terminal (90B) with a wire; And a control unit 10, a communication unit 20, a switch unit 30, an output unit 40, a power supply unit 50, an overvoltage protection unit 60, for opening and closing the opening and closing unit 80 according to a situation. And various signal sensing units 71, 72, 73, and 74.

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 supplied through the power terminal 90A and supplied to the water plug terminal 90B while the opening and closing unit 80 is closed. It monitors the temperature and the external temperature of the embedded 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 controller 10 causes the opening / closing unit 80 to shut off (off, open) to the water terminal 90B. 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), so that electricity received through the power terminal 90A is not supplied to the water outlet terminal 90B. Restrict. In addition, the control unit 10 receives a control signal for switching 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 embedded outlet. When the input is initialized, it is switched to the normal mode.

In the standby current setting mode, 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) corresponds to standby power through the water outlet terminal 90B. 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 connected to the power supply terminal 90A, receives an AC electric power of a commercial power supply, and converts it into a preset DC electric power required by the present invention. 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 supply terminal 90A exceeds a predetermined voltage, the overvoltage protection unit 60 absorbs the supplied electric power so that no electricity is supplied to the water outlet terminal 90B. 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 supply terminal 90A 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 a temperature of an outer front surface of the embedded 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 water outlet terminal 90B so as to cut off the electric supply when the electric wire is overheated. Since it is configured so that the electric accident due to overheating of the wire, as well as the fire due to the electric accident can be prevented.

In addition, the present invention, by detecting the external temperature of the buried outlet with the second heat detection unit 74, when it is determined that the periphery of the buried outlet rises to a high temperature to cut off the electricity supply to the electricity that may occur due to breakage of the buried outlet Prevent fires from accidents and electric accidents.

The first current detector 72 is configured to sense 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 terminal 90A. 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. The first current detecting unit 72 is preferably set by using the rated current value of the embedded outlet as the rated current value.

The second current detection unit 73 is a configuration for detecting a standby current, a current conversion unit for outputting a current induced in proportion to the current of the alternating current supplied to an external device through the water outlet terminal 90B ( 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. The second current detection unit 73 is preferably configured by a circuit with the standby current threshold value, which is the breaking reference of the standby current, as the rated current value, and the standby current threshold value is set in the standby current setting mode as described below. Since it is a variable value to be input, it is possible to select the rated current value of the second current sensing unit 73 in the range of the 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 for sensing a current supplied through the water terminal 90B when the electric device (not shown) is in operation (rated operation), and when the electric device (not shown) is not operated. Since the current sensing unit for detecting the standby current supplied through the water terminal 90B is configured to be separated, it is possible to accurately obtain the current flowing during the rated operation and the standby current and the leakage current flowing in the stopped state, 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 embedded outlet which is a current that can be supplied to the external device through the water outlet terminal (90B); An overcurrent threshold which is a reference for determining whether the current supplied to the external device corresponds to the overcurrent; A standby current threshold which is a reference for determining whether a current supplied to the outside through the water terminal 90B corresponds to a standby current; A leakage current threshold value, which is a criterion for determining whether a leakage current has occurred in a wire or an external device electrically connected through the water terminal 90B; 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 buried outlet 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 current is cut off immediately as the overcurrent flows is to prevent the electric wire connected to the water outlet terminal 90B, the electric wire inside the embedded outlet, and the load electric device 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 continues 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 value may be set in advance in consideration of the allowable temperature of the coating of the insulated wire which is generally connected to the buried outlet, 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 detection unit 74 reaches the external overheat threshold, the controller 10 switches the cutoff unit 80 to a cutoff mode. The second heat detection unit 74 is configured to monitor the temperature of the outside air of the buried outlet to monitor whether the temperature of the air has risen due to a fire, etc. The present invention provides a power source before the buried outlet is damaged due to a 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.

4 is a circuit diagram of the power supply unit 50 in the power saving intelligent embedded outlet for fire protection according to the embodiment of the present invention.

Referring to FIG. 4, the power supply unit 50 according to the exemplary embodiment of the present invention receives a AC electric power of a commercial power supply through the input terminals 57a and 57b connected to the power supply terminal 90A, and rectifies the DC electric power. 51; 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. 4 is as follows.

The rectifier 51 is a bridge circuit composed of four diodes D1, D2, D3, and D4. The rectifier 51 converts AC electricity of a commercial power source input through the input terminals 57a and 57b into full-wave rectification and converts it into direct current. . The converted series electricity is applied to both ends of the positive line (V +) and the ground line (V0) of the switching unit 52, the positive line (V +) is a positive potential by the full-wave rectified DC electric The ground line V0 is grounded and 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 block the overvoltage from flowing into the timer T1 while setting the voltage level of the timer T1, and the capacitor C1 smoothes the electric power 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, wherein 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 that divides 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 voltage of the DC output terminals 58a and 58b as the voltage of the resistor R9 divided by the resistors R8 and R9 connected in series, but the voltage of the DC output terminals 58a and 58b. It may be configured to receive directly, in this case, the resistance value of the variable resistors VR4 and R11 is configured as a device 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 capacitor C3 connected in parallel to both ends of the DC output terminals 58a and 58b of the switching unit 53, and smoothes electricity output by being interrupted through the collector of the transistor Q4. To be supplied to the output stages 58a and 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, the electric power is smoothed to supply the controller 10 with the desired voltage, thereby minimizing power consumption by reducing power waste caused by the use of a 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.

1 is a block diagram of a fire prevention intelligent power outlet for fire protection according to 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 fire protection intelligent embedded outlet for fire protection according to an embodiment of the present invention. And a circuit diagram of the opening and closing portion 80.

Figure 3 is a perspective view (a) and a front view (b) of a fire protection smart power outlet according to an embodiment of the present invention.

4 is a circuit diagram of a power supply unit 50 in a fire protection intelligent embedded outlet for fire protection according to an embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

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

90A: Power supply terminal 90B: Water polo terminal 91: Water polo

Claims (4)

delete delete A power supply terminal 90A connected to a wire that is energized by commercial power and receiving AC electricity; A water supply terminal 90B provided to be in contact with the plug terminal and supplying AC electricity to the plug terminal being in contact; A power supply unit 50 for converting AC electricity input from the power supply terminal 90A 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; By connecting an input terminal to the power terminal 90A with a wire and an output terminal to the water terminal 90B with a wire, selectively supplying AC electricity input from the power terminal 90A to the water terminal 90B. Opening and closing portion 80; An overvoltage protection unit 60 configured to absorb the supplied AC electricity when the voltage of the AC electricity input from the power terminal 90A exceeds a predetermined voltage; A first heat sensing unit 71 sensing a temperature of a wire connected to an input terminal of the opening and closing unit 80; A second heat sensing unit 74 sensing an external temperature; A first current sensing unit 72 configured to sense an electric current of an alternating current received through the power terminal 90A, and set the rated current value of the embedded outlet as a rated current value; A second current sensing unit 73 sensing a standby current flowing through the water terminal 90B; The rated current value of the plug-in outlet, the overcurrent threshold value for judging overcurrent, the standby current threshold value for judging standby current, the leakage current threshold value for judging leakage, the wire for judging 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 the shut-off mode by turning off the 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; Consists of including 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. After switching the opening and closing unit 80 to switch to the blocking mode, 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-proof power saving intelligent embedded 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 plug for fire protection, characterized in that the connection.

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