CN216648785U

CN216648785U - External high-power automatic metering power-off socket

Info

Publication number: CN216648785U
Application number: CN202123283542.9U
Authority: CN
Inventors: 张焰; 叶帮武
Original assignee: Hangzhou Dianwatt Technology Co ltd
Current assignee: Hangzhou Dianwatt Technology Co ltd
Priority date: 2021-12-24
Filing date: 2021-12-24
Publication date: 2022-05-31
Anticipated expiration: 2031-12-24

Abstract

The utility model discloses an external high-power automatic metering power-off socket which comprises a main control module, a power supply module, a power acquisition module, an output control module and a touch screen module. The main control module is used for carrying out different operations according to whether the accessed electric appliance reaches threshold power/current or whether single energy consumption reaches the threshold; the power supply module supplies power to the main control module and each chip, the power acquisition module acquires the power of the electric appliance in real time, the output control module is used for controlling the current output by the socket, and the touch screen module can display the power of the electric appliance and set threshold power/current in real time. The utility model can disconnect the circuit when the power/current of the electric appliance is larger than the set threshold power/current or the single energy consumption of the electric appliance reaches the threshold, thereby avoiding fire caused by the high-power electric appliance.

Description

External high-power automatic metering power-off socket

Technical Field

The utility model relates to a socket, in particular to an external high-power automatic metering power-off socket which is automatically powered off when the power/current of an inserted electric appliance or single energy consumption reaches a threshold value.

Background

Student apartment, public rental house etc. belong to public place, and power consumption safety relates to public interest. The circuit overload is easily caused by using a high-power electric appliance, so that the current is increased, and the electric wire is heated. If the line runs for a long time in full load and overload, the heating value of the line is increased, and the insulating layer is aged more quickly. When the temperature is too high, the insulation layer can generate spontaneous combustion and is separated from the electric wire, so that short circuit is caused to cause fire accidents. In the past, accidents caused by fire disasters caused by using high-power electric appliances have occurred, and the conventional power-off socket cannot set power-off power/current more intuitively according to different environments. Compared with the prior socket, the external high-power automatic metering power-off socket can detect the power/current of an inserted electric appliance and power off the electric appliance when the using power/current of the electric appliance is greater than the set power or the single energy consumption reaches the threshold value, so that a fire disaster caused by the high-power electric appliance is avoided.

SUMMERY OF THE UTILITY MODEL

The utility model provides an external high-power automatic metering power-off socket aiming at places such as student apartments, public buildings and the like, wherein the places have high crowd density and easily cause disasters if high-power electrical appliances are randomly used.

The technical scheme for solving the problems is as follows: an external high-power automatic metering power-off socket comprises a main control module, a power supply module, a current transformer, a power acquisition chip, an output control module, a reset button, a plug, jacks and a cuboid shell;

the head end of the plug is provided with a lead which penetrates through the coil input end of the current transformer, and the other end of the lead is connected to the jack through the control end of the output control module;

the signal output end of the current transformer is connected to the current input end of the power acquisition chip, the voltage input end of the power acquisition chip is connected to the low-voltage end of the transformer, and the high-voltage end of the transformer is connected to the head end of the plug;

the power acquisition chip is connected to the main control module through a serial port, the output end of the main control module is connected to the controlled end of the output control module, and the reset button is connected to one input end of the main control module.

Preferably, the output control module is a relay module, a coil of the relay module is connected to the output end of the main control module, and a normally closed contact pair of the relay module is connected in series in a power supply loop of the jack.

Preferably, the power supply module converts alternating current into direct current through the voltage reduction circuit and the rectification circuit, and then supplies power to the main control module and the power acquisition module through the voltage stabilization chip,

the main control module adopts a stm32 singlechip, the voltage stabilizing chip adopts an LM7805, and the power acquisition chip adopts an HLW 8032.

Preferably, the reset button is positioned at the upper left corner of the front face of the socket, and the plug is positioned at the back face of the socket.

Preferably, the jack is at least one and can be located on the front or side of the socket.

Preferably, the head end of the plug is a live wire or a neutral wire,

the input end of a coil of the relay module is connected with the output end of the main control module through an NPN type triode, and a normally closed contact of the relay module is connected in series in a live line or zero line passage.

Preferably, the touch screen adopts an ATK-43' TFT LCD.

Preferably, the upper half part of the touch screen displays the current power of the current electric appliance, the lower half part of the touch screen displays the current set power-off power/current threshold value, the current power-off power/current threshold value can be set through a key on a screen interface,

the lower half part of the touch screen is provided with two triangular keys which can increase and decrease the size of the threshold value respectively.

The lower half part of the touch screen is also provided with a pull-down menu button which can select the power-off condition as power or current.

Preferably, the lower half part of the touch screen is provided with a single-power-supply electric energy threshold display interface.

Preferably, the lower half portion of the touch screen is provided with a two-state switch, the two triangular buttons can increase and decrease power/current thresholds when the two-state switch is in a first state, and the two triangular buttons can increase and decrease single-time power supply thresholds when the two-state switch is in a second state.

The working principle of the utility model is as follows:

an external high-power automatic metering power-off socket can be divided into a main control module, a power supply module, a power acquisition module, an output control module and a touch screen module according to a functional structure. The device comprises a cuboid shell, a control circuit, a touch screen, a reset button, a plug and a jack from the aspect.

The power supply module supplies power for singlechip and power acquisition module, and power acquisition module obtains the power of current electrical apparatus to transmit data for stm32 singlechip through serial communication's mode. The output control module is positioned in the socket and controlled by the stm32 singlechip to control the opening and closing of the loop. The touch screen is positioned above the socket and used for displaying the power of used electric appliances in real time and setting a power-off power/current threshold and a single-time electric energy threshold.

The jack is located the front or the side of socket for with be connected with electrical apparatus, for power supply with electrical apparatus. The reset button is positioned at the upper left corner in front of the socket and is connected with the input end of the stm32 single chip microcomputer, and the control circuit resets. The plug is located behind the socket and is used for being connected with the embedded socket.

Preferably, the main control module uses a stm32 single chip microcomputer. The power supply module is composed of a voltage reduction circuit, a rectification circuit, a filter capacitor and a voltage stabilization chip LM 7805. The voltage reduction circuit adopts a transformer, the input of the transformer is commercial power, namely alternating current high voltage, the output of the transformer is alternating current low voltage, the alternating current low voltage is connected with a rectification circuit and converted into direct current low voltage, the direct current low voltage is connected with the input end of the LM7805 after passing through the filter capacitor, the output end of the LM7805 is constant direct current voltage of 5V or 3.3V, and the voltage is used as a power supply of the stm32 single chip microcomputer and the power acquisition module to supply power to the power acquisition module after passing through the filter capacitor again.

The power acquisition module consists of a current transformer, a filter capacitor and a power metering chip such as HLW 8032. The input of the transformer is commercial power, namely alternating current high voltage, the output of the transformer is alternating current low voltage, and the alternating current low voltage is input to the voltage input end of the HLW8032 through the filter capacitor; the signal input end of the current transformer, namely the coil input end, is the current of an alternating current power line such as a live wire, the output of the current transformer is small current, the current signal is converted into a voltage signal through a resistor, and the voltage signal is input into the current input end of the HLW8032 through a filter capacitor. The output end of the chip HLW8032 is connected with the input port of the stm32 singlechip, and data are transmitted to the stm32 singlechip in a serial port communication mode.

The output control module consists of a relay module, an NPN type triode and a resistor, wherein the relay module controls the connection of a live wire or a zero wire in the external high-power automatic metering power-off socket to a socket port, namely a jack. Relay coil end is connected with stm32 singlechip, and the voltage of stm32 singlechip output changes the electric current into behind the resistance, and this electric current enlargies through NPN type triode, then control relay module action to circuit with relay module contact connection carries out disconnection and closed operation, realizes the outage and the circular telegram of socket.

The touch screen module consists of an ATK-43' TFTLCD, is connected with the stm32 single chip microcomputer, displays the power of the current electric appliance, can set a power/current threshold value and a single-time electric energy threshold value when the power is automatically cut off through a key on the touch screen, and compares the received power/current threshold value with the power/current of the electric appliance by the stm32 single chip microcomputer; and comparing the single-time power utilization electric energy threshold with the single-time energy consumption, and controlling the relay module to disconnect the circuit if one of the single-time power utilization electric energy threshold is larger than the threshold.

The plug realizes being connected with former embedded socket on the wall body, and the jack realizes being connected with electrical apparatus, resets button control stm32 singlechip reset.

The utility model has the advantages that:

1. the external high-power automatic metering power-off socket is an external socket and can be connected with a normal embedded socket;

2. after the high-power electrical appliance is connected, the connection between a live wire and the like and a power supply loop can be automatically disconnected, so that the possibility of fire caused by the use of the high-power electrical appliance is greatly reduced;

3. the power of the electrical appliance can be observed, and a power threshold or a current threshold can be set according to the requirement;

4. the single energy consumption can be counted, and the opening and closing of the threshold control loop are set.

Drawings

FIG. 1 is a block diagram of the overall structure of the present invention;

FIG. 2 is a circuit diagram of a power supply module according to the present invention;

FIG. 3 is a circuit diagram of a power acquisition module of the present invention;

FIG. 4 is a circuit diagram of an output control module according to the present invention;

FIG. 5 is an external view of the present invention;

FIG. 6 is a diagram of a touch screen display interface according to the present invention;

FIG. 7 is a diagram showing different states of a toggle switch in the display interface according to the present invention;

wherein: 0-free end; 1-a live line; 2-a reset button; 3-a shell; 4-a jack; 5-a plug; 100-a main control module; 200-a power supply module; 300-a power acquisition module; 400-output control module; 500-a touch screen module; 201-a transformer; 202-a rectifying circuit; 203-voltage stabilizing chip; 204-a filter capacitance; 301-a current transformer; 302-resistance; 303-a filter capacitance; 304-a power metering chip; 305-a transformer; 401-a relay module; 402-NPN type triode; 403-resistance; 404-resistance; 501-touch screen; 511-the upper half of the touch screen; 521-the lower half of the touch screen; 5211-touchscreen display power threshold; 5212-threshold adjustment button; 5213-drop down menu; 5214-single power supply power threshold; 5215-a two-state switch; 52151-binary switch state one; 52152-two state switch state two.

Detailed Description

The utility model is further described with reference to the following figures and examples, but not to be construed as being limited thereto.

As shown in fig. 1, the external high-power automatic metering power-off socket mainly includes a main control module 100, a power supply module 200, a power acquisition module 300, an output control module 400, and a touch screen module 500. Preferably, the main control module 100 adopts a stm32 single chip microcomputer 101 and is located inside the socket.

As shown in fig. 2, the power supply module 200 is composed of a transformer 201, a rectifying circuit 202, a voltage stabilizing chip 203 and a filter capacitor 204. The voltage stabilizing chip 203 adopts an LM7805 chip. The input end of the transformer 201 is a live wire 1, which is an alternating current high voltage, the output of the transformer is an alternating current low voltage, the output of the transformer passes through the filter capacitor 204, the positive end of the transformer is input to the voltage stabilizing chip 203, namely the Vin end of the LM7805, the negative end of the transformer is used as the ground end, the output of the Vout port of the LM7805 is a constant direct current voltage of 5V, and the transformer can supply power to the stm32 single chip microcomputer after passing through the filter capacitor 204.

As shown in fig. 3, the power collecting module 300 is composed of a current transformer 301, a resistor 302, a filter capacitor 303, a power metering chip 304 and a transformer 305. Wherein the power metering chip 304 adopts an HLW8032 chip. The input of the transformer 305 is a live wire 1, which is an ac high voltage, and the output thereof is an ac low voltage, and is connected to the VP end of the power metering chip 304, i.e., the HLW8032, through one end of the filter capacitor 303, and the other end is grounded; the input end of the current transformer 301 is live line 1 current, the output of the current transformer is small current, a current signal is converted into a voltage signal through a resistor 302, and the voltage signal is connected with the IP end and the IN end of the HLW8032 IN a differential mode through a filter capacitor. The TX end of the chip HLW8032 is connected with the stm32 single chip microcomputer 101, data are transmitted to the stm32 single chip microcomputer 101 in a serial port communication mode, the stm32 single chip microcomputer 101 obtains power, the power is multiplied by the voltage ratio of the transformer 305 and the current ratio of the current transformer 301, and then the power of the electric appliance can be obtained.

As shown in fig. 4, the output control module 400 is composed of a relay module 401, an NPN transistor 402, a resistor 403, and a resistor 404, where the resistor 404 is connected to the output terminal of the stm32 single chip microcomputer 101. Contact 10 is normally closed contact, is connected with the live wire, and when detecting that power consumption power/electric current surpassed the threshold value or single power consumption reached single power consumption electric energy threshold value, stm32 singlechip 101 output high level, the action of relay module, this normally closed contact disconnection, contact 10 is connected to the suspension end, stops the power supply of high-power electrical apparatus, protection power consumption safety. The output end of the single chip microcomputer 101 in the default state stm32 is in a low level, the low level is input into the NPN type triode 402 from one end of the resistor 404, at the moment, the NPN type triode 402 is not triggered, the relay module 401 does not act, and the contact 10 is in the default state and is connected with the live wire 1; if the output end of the stm32 single chip microcomputer 101 outputs high level, the NPN type triode 402 is started, the relay module 401 attracts the spring piece to enable the contact to be connected with the suspension end 0, and the circuit is disconnected.

As shown in fig. 5, the housing 3 is a cuboid, the left drawing is the front side of the external high-power automatic metering power-off socket, and the right drawing is the back side of the external high-power automatic metering power-off socket. Reset button 2 is located the upper left corner of casing 3 front, is connected with stm32 singlechip 101's input, presses the button and can resets stm32 singlechip 101's output, becomes low level with it again, and relay module 401's contact is connected with live wire 1 again. The touch screen module 500 is an ATK-43' TFTLCD touch screen 501, is located above the shell 3, can receive data of the stm32 single chip microcomputer 101, displays power of electric appliances on the top, can set a power-off power/current and a single-time power-consumption electric energy threshold value on the touch screen 501, and can automatically power off when the power/current of the electric appliances is larger than the set power/current or the single-time power consumption reaches the single-time power-consumption electric energy threshold value. The jack 4 is used for being connected with an electric appliance, and the plug 5 is used for being connected with the embedded socket.

Referring to fig. 6 and 7, the upper half 511 of the touch screen 501 displays the current power of the current electrical appliance, and the lower half 521 is the current power-off power/current threshold, which can be changed. In the lower half there is a display power/current threshold 5211, to the right there is a threshold adjustment button 5212, to the left there is a pull-down menu 5213 to select either the power threshold or the current threshold, to the right of the threshold adjustment button 5212 there is a single power supply threshold 5214, and to the lower side there is a toggle switch 5215. The threshold adjustment button 5212 is used to adjust the power/current threshold when the binary switch 5215 is in state one 52151. The power/current threshold may be increased by pressing the upper triangular button of the threshold adjustment button 5212 and decreased by pressing the lower triangular button of the adjustment button 5212. A power threshold or a current threshold may be selected in the drop down menu 5213. The threshold adjustment button 5212 is used to adjust the single power supply threshold when the binary switch 5215 is in state two 52152. Pressing the upper triangular button of the threshold adjustment button 5212 may increase the single power supply threshold, and pressing the lower triangular button of the adjustment button 5212 may decrease the single power supply threshold.

The high-power metering power-off socket is connected with the embedded socket and can be used as a common socket at the moment. The power utilization electric appliance is connected with the high-power metering power-off socket, the internal circuit of the socket is conducted, and the power is supplied to the stm32 single chip microcomputer 101 through the power supply module 200. Data such as voltage, current and power are obtained through the power acquisition module 300, transmitted to the stm32 single chip microcomputer 101 in a serial port communication mode, and power of the electric appliance at the moment is obtained through the voltage ratio of the transformer 305 and the current ratio of the current transformer 301. The stm32 single chip microcomputer 101 displays the power on the touch screen 501, compares the power with a power/current threshold value set on the touch screen 501, compares single energy consumption of an electric appliance with a single power supply electric energy threshold value in real time, outputs a high level by the stm32 single chip microcomputer 101 if the power/current ratio threshold value is large or the single energy consumption of the electric appliance reaches the single power supply electric energy threshold value, inputs the signal to a controlled end of the output control module 400, converts the signal into a current signal, amplifies the current through the NPN type triode 402, controls the relay module 401 through the current signal to change the contact 10 from a live wire 1 to a suspended end 0, and disconnects the circuit. After the internal circuit is disconnected, the reset button 2 is pressed to reset the output of the stm32 single chip microcomputer 101 to a default state, namely, a low level, the contact 10 of the relay module 401 is connected with the live wire 1 again, and the socket supplies power again.

In special places such as student apartments and the like, high-power electrical appliances cannot be used, for example, the power electrical appliances cannot exceed 1200w, and fire disasters caused by the electrical appliances are avoided. When a student uses the socket, an electrical appliance is inserted into the socket, and a circuit is conducted. The current transformer 301 and the transformer 305 in the socket obtain the voltage and current signals of the circuit at this time in proportion, and transmit the signals to the power metering chip 304, and the power metering chip 304 transmits the data such as the current, voltage and power to the stm32 single chip microcomputer 101 in a serial port transmission mode. The Stm32 singlechip 101 restores the obtained data according to the proportion, displays the power of the data on the touch screen 501, compares the obtained power or current with a power/current threshold set by the lower half portion 521 of the touch screen 501, and compares the single energy consumption of the electric appliance with the single power supply threshold in real time. If the power of the accessed electric appliance is larger than 1200w, or the current in the loop is larger than 5.5A, or the single energy consumption of the electric appliance reaches 1100wh, the stm32 single chip microcomputer 101 outputs high level, the NPN type triode 402 is started to generate large current, the relay module 401 is started to enable the contact 10 to be connected with the live wire 1 and to be connected with the free end 0, and the loop is disconnected, so that the electric appliance cannot be used. In this state, the reset button 2 is pressed to change the output of the stm32 single chip microcomputer 101 to low level again, and the relay module 401 is closed to connect the contact 10 to the live wire 1 again.

The setting of single energy consumption can also remind a user of knowing the consumed electric energy within a certain time in time, so that the user can be reminded whether to be suitable for the electric appliance for too long time and reduce the learning time and other time, the non-inductive power consumption is changed into an inductive prompt, and assistance is provided for work and rest, learning, working and life of the user.

The foregoing is only a preferred embodiment of the utility model.

Claims

1. An external high-power automatic metering power-off socket is characterized by comprising a main control module, a power supply module, a current transformer, a power acquisition chip, an output control module, a reset button, a plug, a jack and a cuboid shell;

2. An external high-power automatic metering power-off socket according to claim 1, wherein the output control module is a relay module, a coil of the relay module is connected to the output end of the main control module, and a normally closed contact pair of the relay module is connected in series in a power supply loop of the jack.

3. The external high-power automatic metering power-off socket according to claim 1, wherein the power supply module converts alternating current into direct current through the voltage reduction circuit and the rectification circuit, and then supplies power to the main control module and the power acquisition module through the voltage stabilization chip,

4. An external high-power automatic metering power-off socket according to claim 1, wherein the reset button is positioned at the upper left corner of the front face of the socket, and the plug is positioned at the back face of the socket.

5. An external high-power automatic metering power-off socket according to claim 4, wherein the plug hole is at least one and can be positioned on the front face or the side face of the socket.

6. The external high-power automatic metering power-off socket according to claim 2, wherein the head end of the plug is a live wire or a neutral wire,

7. The external high-power automatic metering power-off socket according to claim 1, further comprising a touch screen module, wherein the touch screen module adopts an ATK-43' TFT LCD.

8. An external high-power automatic metering power-off socket according to claim 7, wherein the upper half part of the touch screen displays the current power of the electrical appliance, the lower half part displays the current power-off power/current threshold value which can be set by keys on the screen interface,

the lower half part of the touch screen is provided with two triangular keys which can respectively increase and decrease the size of the threshold,

9. An external high-power automatic metering power-off socket according to claim 8, wherein the lower half portion of the touch screen has a single-power-supply power threshold display interface.

10. An external high-power automatic metering power-off socket according to claim 9, wherein the lower half of the touch screen has a two-state switch, the two triangular buttons can increase and decrease the power/current threshold when the two-state switch is in the first state, and the two triangular buttons can increase and decrease the single-time power supply threshold when the two-state switch is in the second state.