An electric shock-proof socket and its control method

Abstract

The present invention provides an anti-electric shock socket and its control method. The socket includes a housing and a circuit unit disposed in the housing. The circuit unit includes a main circuit, a main circuit isolation module, a first driving module for driving the main circuit isolation module, an isolation voltage detection module, a main control module, and a power supply module for supplying power to the main control module. The main circuit includes an input end and an output end, and the main circuit isolation module is disposed between the input end and the output end. The isolation voltage detection module detects the voltage parameters of the main circuit and transmits the voltage parameters to the main control module. The main control module controls the first driving module according to the voltage parameters, and further controls the main circuit isolation module. The present invention controls the main circuit isolation module through the main control module, realizes intelligent and safe control of the internal circuit of the socket, solves the safety hazards of existing sockets, and at the same time uses weak electricity to detect and identify loads, greatly reducing the risk of electric shock caused by human contact with the socket, and has extremely high application value.

Description

Technical Field

[0001] The present invention relates to a socket, and more particularly to an anti-electric shock socket and its control method. Background Art

[0002] Sockets are the most commonly used electrical components in people's daily lives and industrial production. They can complete the handover of mains voltage to electrical energy of electrical equipment, and the safety of sockets is directly related to electrical safety.

[0003] The magnitude of the human body resistance is an important physical factor affecting the degree of harm to the human body after electric shock. The human body resistance is composed of (internal resistance) and (skin). The internal resistance is basically stable, about 500Ω. When the contact voltage is 220V, the average value of the human body resistance is 1900Ω; when the contact voltage is 380V, the human body resistance drops to 1200Ω. Through the analysis and research of a large number of experimental data, it is determined that the average value of the human body resistance is generally about 2000Ω, and when calculating and analyzing, the lower limit value of 1700Ω is usually taken.

[0004] At present, the safety voltage levels of alternating current stipulated by the safety voltage standard in China are as follows:

[0005] 1. 42 volts (no-load upper limit less than or equal to 50 volts) can be used in occasions such as hand-held electric tools in places with electric shock hazards.

[0006] 2. 36 volts (no-load upper limit less than or equal to 43 volts) can be used in occasions such as safety lamps in mines, places with conductive dust, etc.

[0007] 3. Three gears of 24 volts, 12 volts, and 6 volts (no-load upper limits less than or equal to 29 volts, 15 volts, and 8 volts respectively) can be selected for equipment with some live parts that the human body may accidentally touch.

[0008] Most of the existing sockets directly connect the electrode contacts inside the socket to the power cord, and when in use, the electrical appliance plug directly contacts the electrode contacts to achieve the purpose of connecting the power supply. Since the electrode contacts of this kind of socket are always energized, it is easy to trigger danger during the process of plugging or unplugging the plug, and the pins are exposed when not fully inserted into the socket or not fully pulled out of the socket, and are easily directly or indirectly touched by the human hand, resulting in electric shock accidents. In the prior art, to solve the anti-electric shock problem of sockets, a protection cover is usually added at the jack using a simple mechanical principle, so that the jack automatically closes after the pin is pulled out. However, this anti-electric shock method has many drawbacks, such as the pin is extremely unsmooth when inserted into the socket, the mechanical life of the protection cover is easily damaged after multiple plugging and unplugging of the pin, the protection cover falling off will block the jack and affect the use, and there is no anti-electric shock protection when the plug is inserted into the jack, resulting in problems such as reduced service life of the socket, poor user experience, and unsafe power use.

[0009] Therefore, a safe and intelligent electric shock prevention socket is needed to solve the problem of electrical safety brought by sockets. Summary of the Invention

[0010] Based on the problems existing in the prior art, the present invention provides an electric shock prevention socket and its control method. The specific technical solutions are as follows:

[0011] An electric shock prevention socket includes a housing and a circuit unit arranged in the housing. The circuit unit includes a main circuit, a main circuit isolation module, a first driving module for driving the main circuit isolation module, an isolation voltage detection module, a main control module, and a power supply module for supplying power to the main control module. The main circuit includes an input end and an output end, and the main circuit isolation module is arranged between the input end and the output end. The first driving module is respectively connected to the main control module and the main circuit isolation module, and the isolation voltage detection module is respectively connected to the main circuit and the main control module. The isolation voltage detection module is used to detect the voltage parameters of the main circuit and transmit the voltage parameters to the main control module. The main control module is used to control the first driving module according to the voltage parameters, and further control the main circuit isolation module.

[0012] In addition, it further includes a detection isolation module and a detection module. The detection module is respectively connected to the main control module and the detection isolation module. The detection isolation module is respectively connected to the output end, the detection module, and the main control module. The detection isolation module is used to detect the load at the output end through a first weak current when the main circuit is disconnected, and disconnect the circuit for detecting the load at the output end when the main circuit is conducting. The detection module is used to detect and identify the load at the output end through a second weak current, and transmit the load information to the main control module.

[0013] In addition, it further includes an isolation current detection module. The isolation current detection module is respectively connected to the main circuit and the main control module. The isolation current detection module is used to detect the current parameters of the main circuit and transmit the current parameters to the main control module.

[0014] Specifically, a relay is arranged on the main circuit isolation module, and a relay driving circuit is arranged on the first driving module. The relay driving circuit is respectively connected to the relay and the main control module. An intermediate relay and an intermediate relay driving circuit are arranged on the detection isolation module. The intermediate relay driving circuit is respectively connected to the intermediate relay and the main control module.

[0015] More specifically, the main circuit isolation module includes a first relay and a second relay; a normally open contact of the first relay is connected to the live wire of the input terminal, and another normally open contact is connected to the live wire of the output terminal; a normally open contact of the second relay is connected to the neutral wire of the input terminal, and another normally open contact is connected to the neutral wire of the output terminal.

[0016] More specifically, the detection isolation module includes a first intermediate relay and a second intermediate relay, as well as a first intermediate relay drive circuit for driving the first intermediate relay and a second intermediate relay drive circuit for driving the second intermediate relay; a normally open contact of the first intermediate relay is sequentially connected to a first resistor and the detection module, a second resistor is connected in parallel between the first resistor and the normally open contact, the second resistor is connected in series with a capacitor and grounded, another normally open contact is connected to the main circuit, one end of the coil is connected to the first intermediate relay drive circuit, and the other end of the coil is connected to a first protection resistor and connected to the first weak current; a normally open contact of the second intermediate relay is connected to a third resistor and grounded, a fourth resistor is connected in parallel between the third resistor and the normally open contact, the fourth resistor is connected to a capacitor and grounded, another normally open contact is connected to the main circuit, one end of the coil is connected to the second intermediate relay drive circuit, and the other end of the coil is connected to a second protection resistor and connected to the first weak current.

[0017] More specifically, the detection module includes a first transistor and a second transistor; the collector of the first transistor is sequentially connected to the first resistor and a normally open contact of the first intermediate relay, the emitter is sequentially connected to a fifth resistor and the base, and is connected to the second weak current; the base of the second transistor is sequentially connected to a sixth resistor and the main control module, the emitter is grounded, and the collector is sequentially connected to a seventh resistor and the base of the first transistor.

[0018] In particular, the voltage range of the first weak current includes not exceeding 5V, and the voltage of the second weak current includes 6V, 12V, 24V, 36V or 42V.

[0019] A control method for an anti-electric shock socket, applicable to the anti-electric shock socket described above, detects the voltage parameters of the main circuit through the isolation voltage detection module, and transmits the voltage parameters to the main control module, and the main control module determines whether the voltage parameters are normal; if the voltage parameters are abnormal, the main control module disconnects the drive current for driving the main circuit isolation module through the first drive module, and the main circuit isolation module remains in the disconnected state, so that the main circuit is in the disconnected state.

[0020] In addition, the electric shock-proof socket further includes a detection module and a detection isolation module. When the main circuit is disconnected, the detection isolation module outputs a first weak current to detect the load at the output terminal. When the main circuit is conducting, the detection isolation module disconnects the circuit for detecting the load at the output terminal. If the voltage parameter is normal, the detection isolation module outputs the first weak current to detect whether there is a load at the output terminal. If there is no load at the output terminal, the main control module controls the first drive module to cut off the drive current for driving the main circuit isolation module, and the main circuit isolation module remains in the disconnected state, keeping the main circuit in the disconnected state. If there is a load at the output terminal, the detection isolation module detects the load information at the output terminal through the first weak current and sends the load information to the main control module.

[0021] In addition, the main control module receives the load information and compares the load information with the human body resistance range. If the load information is within the human body resistance range, the main control module controls the first drive module to cut off the drive current for driving the main circuit isolation module, and the main circuit isolation module remains in the disconnected state, keeping the main circuit in the disconnected state. If the load information is not within the human body resistance range, the detection module outputs a second weak current to perform a warning process on the load at the output terminal.

[0022] Particularly, after "the detection module outputs a second weak current to perform a warning process on the load at the output terminal", it further includes that the detection isolation module identifies whether there is a load at the output terminal. If there is a load at the output terminal, the main control module determines that there is no human contact at the output terminal, the detection isolation module disconnects the circuit for detecting the load at the output terminal, the main control module controls the first drive module to conduct the drive current for driving the main circuit isolation module, and the main circuit isolation module remains in the closed state, keeping the main circuit in the conducting state. If there is no load at the output terminal, the main control module determines that there is human contact at the output terminal, and controls the first drive module to continue to cut off the drive current for driving the main circuit isolation module, and the main circuit isolation module remains in the disconnected state, keeping the main circuit in the disconnected state.

[0023] Particularly, the electric shock-proof socket further includes an isolation current detection module. After the main circuit is conducting, it further includes: the isolation current detection module monitors whether the current parameter of the main circuit is normal. If the current parameter is abnormal, the main control module controls the first drive module to continue to cut off the drive current for driving the main circuit isolation module, and the main circuit isolation module remains in the disconnected state, keeping the main circuit in the disconnected state.

[0024] The present invention has the following beneficial effects:

[0025] In view of the deficiencies of the prior art, the present invention proposes an anti-electric shock socket and its control method. By using a relay as a strong electric switch, the main circuit of the socket can be effectively disconnected and conducted; by setting an isolation current detection module and an isolation voltage detection module, the current parameters and voltage parameters of the socket circuit are monitored in real time; by setting a detection module and a detection isolation module, the situation of the load at the output end is detected. When a person touches the socket, the main circuit is disconnected to avoid the occurrence of electric shock accidents; by detecting and identifying the load at the output end through weak electricity, it can not only ensure the expulsion and warning effect on the person touching the socket, but also protect the safety of the socket and the load.

[0026] To make the above objects, features and advantages of the present invention more obvious and understandable, the following specifically enumerates preferred embodiments and, in conjunction with the accompanying drawings, makes a detailed description as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can also be obtained based on these drawings without creative efforts.

[0028] Figure 1 is a schematic diagram of the modules of the anti-electric shock socket proposed by the embodiment of the present invention;

[0029] Figure 2 is the circuit diagram of the main circuit isolation module proposed by the embodiment of the present invention;

[0030] Figure 3 is the circuit diagram of the first driving module proposed by the embodiment of the present invention;

[0031] Figure 4 is the circuit diagram of the main control module proposed by the embodiment of the present invention;

[0032] Figure 5 is the circuit diagram of the power supply module proposed by the embodiment of the present invention;

[0033] Figure 6 is the circuit diagram of the isolation voltage detection module proposed by the embodiment of the present invention;

[0034] Figure 7 is the circuit diagram of the detection isolation module proposed by the embodiment of the present invention;

[0035] Figure 8 is the circuit diagram of the detection module proposed by the embodiment of the present invention;

[0036] Figure 9 is the circuit diagram of the isolation current detection module proposed by the embodiment of the present invention;

[0037] Figure 10 It is a schematic diagram of the operation of the main control module proposed in the embodiment of the present invention;

[0038] Figure 11 It is a schematic diagram of the operation of the detection and isolation module proposed in the embodiment of the present invention;

[0039] Figure 12 It is a schematic diagram of the operation of the detection module proposed in the embodiment of the present invention;

[0040] Figure 13 It is a complete flowchart of the control method proposed in the embodiment of the present invention.

[0041] Reference numerals: 1 - main circuit; 2 - main circuit isolation module; 3 - first drive module; 4 - isolation voltage detection module; 5 - main control module; 6 - power supply module; 7 - detection and isolation module; 8 - detection module; 9 - isolation current detection module; 11 - input terminal; 12 - output terminal. Detailed implementation manners

[0042] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0043] Embodiment 1

[0044] In view of the deficiencies of the prior art, this embodiment provides an anti-electric shock socket, and the specific solution is as follows:

[0045] An anti-electric shock socket, comprising a housing and a circuit unit disposed in the housing. The circuit unit includes a main circuit 1, a main circuit isolation module 2, and a first driving module 3 that provides driving for the main circuit isolation module 2. Among them, the main circuit 1 includes an input end 11 and an output end 12. The input end 11 includes a common AC input power supply, and the output end 12 includes each jack on the socket. The main circuit isolation module 2 is disposed between the input end 11 and the output end 12. The first driving module 3 is connected to the main circuit isolation module 2 to provide driving for the main circuit isolation module 2. It further includes an isolation voltage detection module 4, a main control module 5, and a power supply module 6 that supplies power to the main control module 5. The isolation voltage detection module 4 is used to detect the voltage parameters of the main circuit 1 and transmit the voltage parameters to the main control module 5. The main control module 5 is the core control module. According to the voltage parameters collected by the isolation voltage detection module 4, it determines whether there is a load working on the socket, and controls the operation of the main circuit isolation module 2 by controlling the first driving module 3, thereby realizing the conduction and disconnection of the main circuit 1. The power supply module 6 supplies electrical energy to the entire detection circuit, including the main control module 5 and the isolation voltage detection module 4. The module schematic diagram is as shown in the attached Figure 1 description.

[0046] Specifically, the main circuit isolation module 2 is disposed between the input end 11 and the output end 12 of the main circuit 1, which is the core design of this embodiment and is used to control the conduction and disconnection of the main circuit 1. Preferably, a relay is provided on the main circuit isolation module 2, and a relay driving circuit is provided on the first driving module 3. The main circuit isolation module 2 mainly utilizes the strong isolation effect of the relay to cut off and connect the output power supply of the main circuit 1, thereby realizing the safety control of the socket output. In particular, the main circuit isolation module 2 includes a first relay K2 and a second relay K4. Both the first relay K2 and the second relay K4 are provided with two normally open contacts. One normally open contact of the first relay K2 is connected to the live wire of the input end 11 of the main circuit 1, and the other normally open contact is connected to the live wire of the output end 12 of the main circuit 1. One normally open contact of the second relay K4 is connected to the neutral wire of the input end 11 of the main circuit 1, and the other normally open contact is connected to the neutral wire of the output end 12 of the main circuit 1. One end of the coil of the first relay K2 is connected to the first driving module 3, and the other end is connected to a 5V voltage source. A 1K protection resistor R2 is connected in series between the coil and the voltage source. The connection method of both ends of the coil of the second relay K2 is the same as that of both ends of the first relay K2. One end of the coil of the second relay K4 is connected to the first driving module 3, and the other end is connected to a 5V voltage source. A 1K protection resistor R6 is connected in series between the coil and the voltage source. The circuit of the main circuit isolation module 2 is as shown in the attached Figure 2As shown in the figure. In addition, two detection points are set at the position of the live wire of the output terminal 12 to detect the current parameters of the circuit. The first relay K2 and the second relay K4 are controlled by the first driving module 3. If the first driving module 3 stops providing driving current, the first relay K2 and the second relay K4 stop working, and the contacts remain normally open, disconnecting the live wire and the neutral wire of the main circuit 1, and the socket is in a safe and power-off state.

[0047] Specifically, the first driving module 3 is connected to the main circuit isolation module 2 to provide driving for the main circuit isolation module 2. The first driving module 3 includes a first relay driving unit and a second relay driving unit, and the two driving units respectively provide driving for the two relays of the main circuit isolation module 2. A field effect transistor Q1 is provided on the first relay driving unit. The drain of the field effect transistor Q1 is connected to one end of the coil of the first relay K2. A 100K protection resistor R12 is connected in series between the source and the gate. The source is grounded, and the gate is connected to the main control module 5. A field effect transistor Q2 is provided on the second relay driving unit. The drain of the field effect transistor Q2 is connected to one end of the coil of the second relay K4. A 100K protection resistor R9 is connected in series between the source and the gate. The source is grounded, and the gate is connected to the main control module 5. The circuit diagram of the first driving module 3 is as shown in the appendix of the specification. Figure 3 The main control module 5 realizes the on-off of the driving current by controlling the on-off of the field effect transistor, and further realizes the control of the main circuit isolation module 2 through the driving current.

[0048] Specifically, the main control module 5 is the core control module. According to the information collected by each module, it makes a comprehensive judgment and processing of the circuit unit. A single-chip microcomputer is provided on the main control module 5, which can judge the state of the circuit unit according to the information collected by each module and issue the final instruction. In this embodiment, a single-chip microcomputer of the JXY-FC10LV16NSOP model is selected, and the pins of the single-chip microcomputer are as shown in the appendix of the specification. Figure 4 In this embodiment, the main control module 5 is respectively connected to the isolation voltage detection module 4 and the first driving module 3. According to the voltage parameters transmitted by the isolation voltage detection module 4, it judges the operation condition of the main circuit 1, and then controls the main circuit isolation module 2 by controlling the first driving module 3 to realize a complete closed-loop control.

[0049] Specifically, the power supply module 6 is connected to the main control module 5 to provide electrical energy for the detection circuit. The power supply module 6 mainly uses transformer isolation and step-down to realize the power supply of the subsequent circuit. The circuit diagram of the power supply module 6 is as shown in the appendix of the specification. Figure 5As shown in the figure. A rectifier filter circuit is provided on the power supply module 6. The rectifier circuit converts AC electrical energy into DC electrical energy, and the filter circuit is arranged between the rectifier circuit and the load to filter out the AC components in the pulsating DC voltage. The function of the transformer is to achieve the matching between the AC input voltage and the DC output voltage and the electrical isolation between the AC power grid and the rectifier circuit. The power supply module 6 supplies electrical energy to the main control module 5. By selecting different isolation current detection modules 9, the power supply module 6 also adaptively selects whether to supply power to the isolation voltage detection module 4. In addition, a power distribution protection circuit is also provided on the power supply module 6 to provide comprehensive protection for the circuit.

[0050] Specifically, the isolation voltage detection module 4 is connected to the main circuit 1 and the main control module 5, and is used to detect the voltage parameters of the main circuit 1 and transmit them to the main control module 5. The main control module 5 determines whether the voltage parameters are within the normal range. The isolation voltage detection module 4 is provided with an optocoupler isolation circuit, as shown in the attached instructions Figure 6 As shown. The isolation voltage detection module 4 mainly uses the optocoupler isolation circuit to detect whether the voltage parameters of the main circuit 1 meet the output conditions. Generally speaking, the voltage parameter range includes 100 - 240V.

[0051] This embodiment provides an anti-electric shock socket. The main circuit 1 of the socket is turned on and off by controlling the relay through the main control module 5. The voltage parameters of the main circuit 1 are detected by the isolation voltage detection module 4. If the voltage parameters are abnormal, the main control module 5 controls the main circuit isolation module 2 to disconnect the main circuit 1 and turn off the output of the neutral line and the live line to ensure the safety of the socket. In this embodiment, a relay is used as the switch for isolating and switching the strong electricity. When the voltage of the socket is detected to be abnormal, the output of the neutral line and the live line is turned off to ensure the safety of using electricity of the socket.

[0052] Embodiment 2

[0053] On the basis of Embodiment 1, this embodiment adds a detection module 8 and a detection isolation module 7 to detect whether someone touches the socket, effectively protecting the safety of electrical equipment and the human body. The specific solution is as follows:

[0054] On the basis of Embodiment 1, this embodiment adds a detection module 8 and a detection isolation module 7. The detection isolation module 7 is respectively connected to the main control module 5, the detection module 8 and the main circuit 1, and the detection module 8 is connected to the main control module 5.

[0055] Specifically, the detection isolation module 7 is mainly used to output the load of the first weak-current detection output terminal 12 when the main circuit 1 is disconnected, and to disconnect the circuit of the detection output terminal 12 load when the main circuit 1 is conducting. The voltage of the first weak current does not exceed 5V. Preferably, the present invention selects a 5V first weak-current detection output terminal 12 load. A relay is provided on the detection isolation module 7, including a first intermediate relay K1 and a second intermediate relay K3. Therefore, this embodiment further includes a second driving module provided on the detection isolation module 7. The second driving module has the same structure as the first driving module 3, and two field effect transistors are used to drive the two intermediate relays respectively. Both the first intermediate relay K1 and the second intermediate relay K3 are provided with two normally open contacts. One normally open contact of the first intermediate relay K1 is sequentially connected to the first resistor R1 and the detection module 8. A second resistor R3 is connected in parallel between the first resistor R1 and the normally open contact. The second resistor R3 is connected in series with a capacitor and grounded. The other normally open contact is connected to the main circuit 1, specifically to the live wire of the output terminal 12; one end of the coil is connected to the second driving module, the other end is connected to a 5V voltage source, and a 1K first protection resistor R2 is connected in series. One normally open contact of the second intermediate relay K3 is connected to the third resistor R5 and grounded. A fourth resistor R7 is connected in parallel between the third resistor R5 and the normally open contact. The fourth resistor R7 is connected to a capacitor and grounded. The other normally open contact is connected to the main circuit 1, specifically to the neutral wire of the main circuit 1 output terminal 12; one end of the coil of the second intermediate relay K3 is connected to the second driving module, the other end is connected to a 5V voltage source, and a 1K second protection resistor R6 is connected in series. The circuit diagram of the detection isolation module 7 is as shown in the appendix of the specification Figure 7 shown. The detection isolation module 7 mainly utilizes the isolation function of the relay to detect the load condition of the main circuit 1 when the main circuit 1 is disconnected; when the main circuit 1 is conducting, the detection circuit is disconnected to ensure that the detection circuit does not affect the normal operation of the socket.

[0056] Specifically, the detection module 8 is used to test and identify the load of the output terminal 12 through weak current. The detection module 8 includes a first transistor Q5 and a second transistor Q6. The collector of the first transistor Q5 is sequentially connected to the first resistor R1 and one normally open contact of the first intermediate relay K1. The emitter is sequentially connected to the fifth resistor R17 and the base, and is connected to a second weak current. The second weak current voltage includes 6V, 12V, 24V, 36V or 42V. Preferably, this embodiment selects 36V weak current; the base of the second transistor Q6 is sequentially connected to the sixth resistor R19 and the main control module 5, the emitter is grounded, and the collector is sequentially connected to the seventh resistor R18 and the base of the first transistor Q5. The circuit diagram of the detection module 8 is as shown in the appendix of the specification Figure 8As shown. The detection module 8 uses weak electricity to identify electrical appliances and the human body for the load at the output end 12. By comparing the load resistance with the human body resistance, it determines whether there is human contact at the output end 12, and further identifies whether there is human hand contact with the socket. In particular, after identifying that the load is not a human body, the detection module 8 first performs a second weak electricity output, which can not only expel the contacting human body to avoid the main control module 5 failing to correctly identify the human body, but also confirm whether there is a short circuit or overload when an external load is connected. A safety voltage of 36V is used for the weak electricity output, which will not cause damage to the human body, but can play a role in warning the human body. Before the strong electricity is turned on, the socket can be detected for short circuit or overload through weak electricity, preventing electrical appliances from being damaged due to short circuit or overload.

[0057] In addition, the anti-electric shock socket of this embodiment further includes an isolation current detection module 9. The isolation current detection module 9 is connected to the main circuit 1 and the main control module 5, and is used to detect the current parameters of the main circuit 1 and transmit the current parameters to the main control module 5. In this embodiment, the isolation current detection module 9 includes a Hall sensor, which has the characteristics of high precision, good linearity, and strong anti-magnetic field interference ability. The isolation current detection module 9 mainly uses the Hall sensor to isolate and detect the current flowing through the main circuit 1 to determine whether the socket has an output; when it is detected that there is no current or the current is close to zero in the main circuit 1, the main control module 5 controls the main circuit isolation module 2 to isolate the main circuit 1 and turn off the output of the zero line and the live line, ensuring the safety of the socket in all directions, solving the drawback that the socket is still energized when working without a load, and completely cutting off the output of the main circuit 1 in the case of no load. The preferred Hall sensor in this embodiment is MT9221, and the circuit diagram of the isolation current detection module 9 is as shown in the attached Figure 9 as shown. The complete module schematic diagram is as shown in the attached Figure 1 as shown.

[0058] In this embodiment, on the basis of Embodiment 1, the detection module 8 and the detection isolation module 7 are added, and weak electricity is used to detect and identify the load at the output end 12. The detection isolation module 7 detects the load at the output end 12, and the main control module 5 compares the load information with the human body resistance to determine whether there is human contact at the output end 12. If there is human contact, the main control module 5 disconnects the main circuit 1. If there is no human contact, the main control module 5 controls the detection module 8 to output the second weak electricity to warn the load, preventing an electric shock accident caused by the main control module 5 failing to correctly identify the human body. In addition, an isolation current detection module 9 is also added to detect the current parameters of the main circuit 1. If the current parameters are abnormal, the main control module 5 disconnects the main circuit 1.

[0059] Embodiment 3

[0060] This embodiment proposes a control method for an anti-electric shock socket, which is applicable to the anti-electric shock sockets proposed in Embodiment 1 and Embodiment 2. The specific scheme is as follows:

[0061] A main circuit isolation module 2 is provided between the input terminal 11 and the output terminal 12 of the main circuit 1 to control the conduction and disconnection of the main circuit 1. The first driving module 3 provides driving for the main circuit isolation module 2, and the main control module 5 controls the main circuit isolation module 2 by controlling the operation of the first driving module 3, thereby realizing the control of the conduction and disconnection of the main circuit 1 by the main control module 5. An isolation current detection module 9 and an isolation voltage detection module 4 are provided between the input terminal 11 and the main circuit isolation module 2. The isolation current detection module detects the current parameters of the main circuit 1 through a Hall sensor and transmits the current parameters to the main control module 5; the isolation voltage detection module 4 detects the voltage parameters of the main circuit 1 through an opto-isolation circuit and transmits the voltage parameters to the main control module 5; the main control module 5 judges the operating state of the main circuit 1 according to the current parameters and voltage parameters and issues an instruction to control the disconnection and closing of the main circuit 1. A detection isolation module 7 is provided between the output terminal 12 and the main circuit isolation module 2. The detection isolation module 7 detects the load condition of the output terminal 12 when the main circuit 1 is disconnected and disconnects the detection circuit when the main circuit 1 is conducting. The main control module 5 identifies whether the load at the output terminal 12 is a human body according to the detection of the load by the detection isolation module 7. After detecting a load, a weak current is output first to expel the contacting human body.

[0062] The isolation voltage detection module 4 detects the voltage parameters of the main circuit 1. If the voltage parameters are within the normal range, the main control module 5 judges that the socket is operating normally. If the voltage parameters are not within the normal range, the main control module 5 judges that the socket is operating abnormally. At this time, the main control module 5 controls the first driving module 3 to stop providing driving current for the main circuit isolation module 2. The relay of the main circuit isolation module 2 cannot work without driving current, and the contact remains in the normally open state. The live wire and the neutral wire of the main circuit 1 are both in the disconnected state, and the socket stops working. The specific operation process is as shown in the attached Figure 10 instructions.

[0063] The detection isolation module 7 disconnects the detection circuit when the main circuit 1 is conducting; when the main circuit 1 is disconnected, it detects the load condition of the main circuit 1 and transmits the load information to the main control module 5, and the main control module 5 compares the load information with the human body resistance range. The operation process of the detection isolation module 7 is as shown in the attached Figure 11 instructions. If the load information is within the human body resistance range, the main control module 5 judges that there is human contact at the output terminal 12. At this time, the main control module 5 controls the first driving module 3 to stop providing driving current for the main circuit isolation module 2. The relay of the main circuit isolation module 2 cannot work without driving current, and the contact remains in the normally open state. The live wire and the neutral wire of the main circuit 1 are both in the disconnected state, and the socket stops working. By using conventional human body resistance recognition, it is possible to effectively judge whether there is human contact with the socket. Otherwise, the main control module 5 first controls the detection module 8 to output a second weak current to give a warning to the load at the output terminal 12. The process is as shown in the attachedFigure 12 As shown, the output of the low-voltage power can not only play a role in expelling and warning, but also confirm whether the circuit unit is in a normal or abnormal condition when an external load is connected. Abnormal conditions include short circuit, overload, etc. After detecting a load, a 36V low-voltage power is used to give a warning and expel, driving away the contacted human body to prevent electric shock accidents caused by the main control module 5 failing to recognize the human body.

[0064] In a specific application, the specific process of the method includes: the isolation voltage detection module 4 detects the voltage parameters of the main circuit 1 and transmits the voltage parameters to the main control module 5. The main control module 5 determines whether the voltage parameters are abnormal. If the voltage parameters are abnormal, the main control module 5 controls the disconnection of the main circuit 1. If the voltage parameters are normal, it is detected whether there is a load at the first weak-current detection output terminal 12 of the isolation module 7. If there is no load at the output terminal 12, the main control module 5 disconnects the main circuit 1. If there is a load at the output terminal 12, the isolation module 7 detects the load information through the first weak-current detection output terminal 12 and transmits the output information to the main control module 5. The main control module 5 compares the load information with the human body resistance range. If the load information is within the human body resistance range, the main control module 5 determines that there is human contact at the output terminal 12 and disconnects the main circuit 1. If the load information is not within the human body resistance range, the main control module 5 controls the detection module 8 to output a second weak current to give a warning to the load at the output terminal 12. After the warning process, after a 3-second interval, the isolation module 7 identifies whether there is still a load at the output terminal 12. If there is no load at the output terminal 12, the main control module 5 determines that there was human contact at the output terminal 12 before, and the main control module 5 disconnects the main circuit 1. If there is a load at the output terminal 12, the main control module 5 determines that there is no human contact at the output terminal 12. At this time, the detection module 8 disconnects the circuit for detecting the load at the output terminal 12, and the main circuit 1 is turned on. The isolation current detection module 9 detects the current parameters of the main circuit 1 and transmits the current parameters to the main control module 5. The main control module 5 determines whether the current parameters are normal. If the current parameters are abnormal, the main control module 5 disconnects the main circuit 1. If the current parameters are normal, the main circuit 1 remains in the on state. The complete control flow chart is as shown in the attached Figure 13 As shown, the first weak current is preferably 5V, and the second weak current is preferably 36V.

[0065] This embodiment provides a control method for an anti-electric shock socket, which can effectively solve a series of electric shock problems in the prior art for sockets, making the control of the socket more intelligent and safe.

[0066] The present invention provides an anti-electric shock socket and its control method. By controlling the disconnection and conduction of the main circuit of the socket through a relay, the main control module judges the problems existing in the socket and makes corresponding treatments according to the information collected by each module, which can effectively reduce the occurrence of electric shock accidents and make the control method of the socket more intelligent; through the isolated current detection module and the isolated voltage detection module, the current information and voltage information of the socket can be effectively obtained. When it is detected that there is no current or the current is close to zero in the main circuit, the output of the neutral wire and the live wire is turned off to make the socket not charged in the non-working state, ensuring the electrical safety of the socket; through weak current for expulsion warning, it will neither cause damage to the human body nor avoid electric shock to the user; through the detection module and the detection isolation module, the ability of the main control module to identify and judge the human body resistance is effectively improved, reducing the occurrence of electric shock accidents.

[0067] Those skilled in the art can understand that the drawings are only schematic diagrams of a preferred implementation scenario, and the modules or processes in the drawings are not necessarily essential for implementing the present invention.

[0068] Those skilled in the art can understand that the modules in the device in the implementation scenario can be distributed in the device in the implementation scenario according to the description of the implementation scenario, or can be correspondingly changed to be located in one or more devices different from this implementation scenario. The modules in the above implementation scenario can be combined into one module, or can be further split into multiple sub-modules.

[0069] The above serial numbers of the present invention are only for description and do not represent the advantages or disadvantages of the implementation scenario.

[0070] The above discloses only several specific implementation scenarios of the present invention. However, the present invention is not limited thereto, and any changes that can be thought of by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. An electric shock-proof socket, comprising a housing and a circuit unit disposed in the housing, characterized in that, The circuit unit includes a main circuit, a main circuit isolation module, a first drive module for driving the main circuit isolation module, an isolation voltage detection module, an isolation current detection module, a main control module, and a power supply module for supplying power to the main control module; The main circuit includes an input end and an output end, and the main circuit isolation module is arranged between the input end and the output end; The first drive module is respectively connected to the main control module and the main circuit isolation module, and the isolation voltage detection module is respectively connected to the main circuit and the main control module. The isolation voltage detection module is used to detect the voltage parameters of the main circuit and transmit the voltage parameters to the main control module; The main control module is used to control the first drive module according to the voltage parameters, and further control the main circuit isolation module; The main circuit isolation module includes a first relay and a second relay; a normally open contact of the first relay is connected to the live wire of the input end, and the other normally open contact is connected to the live wire of the output end; a normally open contact of the second relay is connected to the neutral wire of the input end, and the other normally open contact is connected to the neutral wire of the output end; The isolation current detection module is respectively connected to the main circuit and the main control module. The isolation current detection module is used to detect the current parameters of the main circuit and transmit the current parameters to the main control module.

2. The electric shock-proof socket according to claim 1, characterized in that, It further includes a detection isolation module and a detection module. The detection module is respectively connected to the main control module and the detection isolation module. The detection isolation module is respectively connected to the output end, the detection module, and the main control module. The detection isolation module is used to detect the load at the output end through a first weak current when the main circuit is disconnected, and disconnect the circuit for detecting the load at the output end when the main circuit is conducting; The detection module is used to detect and identify the load at the output end through a second weak current and transmit the load information to the main control module.

3. The electric shock-proof socket according to claim 2, wherein, A relay drive circuit is arranged on the first drive module. The relay drive circuit is respectively connected to the first relay, the second relay, and the main control module; An intermediate relay and an intermediate relay drive circuit are arranged on the detection isolation module. The intermediate relay drive circuit is respectively connected to the intermediate relay and the main control module.

4. The electric shock-proof socket according to claim 3, characterized in that, The detection isolation module includes a first intermediate relay and a second intermediate relay, a first intermediate relay drive circuit for driving the first intermediate relay, and a second intermediate relay drive circuit for driving the second intermediate relay; A normally open contact of the first intermediate relay is sequentially connected to a first resistor and the detection module. A second resistor is connected in parallel between the first resistor and the normally open contact. The second resistor is connected in series with a capacitor and grounded. The other normally open contact is connected to the main circuit. One end of the coil is connected to the first intermediate relay drive circuit, and the other end of the coil is connected to a first protection resistor and connected to the first weak current; One normally open contact of the second intermediate relay is connected to a third resistor and grounded. A fourth resistor is connected in parallel between the third resistor and the normally open contact. The fourth resistor is connected to a capacitor and grounded. Another normally open contact is connected to the main circuit. One end of the coil is connected to the driving circuit of the second intermediate relay, and the other end of the coil is connected to a second protection resistor and connected to the first weak electricity.

5. The electric shock-proof socket according to claim 4, characterized in that, The detection module includes a first transistor and a second transistor; The collector of the first transistor is sequentially connected to the first resistor and one normally open contact of the first intermediate relay. The emitter is sequentially connected to the fifth resistor and the base, and connected to the second weak electricity. The base of the second transistor is sequentially connected to the sixth resistor and the main control module. The emitter is grounded. The collector is sequentially connected to the seventh resistor and the base of the first transistor.

6. The electric shock-proof socket according to claim 2, wherein, The voltage range of the first weak electricity includes not exceeding 5V. The voltage of the second weak electricity includes 6V, 12V, 24V, 36V or 42V.

7. A control method for an anti-electric shock socket, applicable to the anti-electric shock socket according to claim 1, characterized in that the voltage parameters of the main circuit are detected by the isolation voltage detection module, and the voltage parameters are transmitted to the main control module, and the main control module judges whether the voltage parameters are normal; if the voltage parameters are abnormal, the main control module disconnects the driving current for driving the main circuit isolation module by controlling the first driving module, and the main circuit isolation module remains in the off state, so that the main circuit is in the off state.

8. The control method according to claim 7, wherein The anti-electric shock socket further includes a detection module and a detection isolation module. When the main circuit is off, the detection isolation module outputs the first weak electricity to detect the load at the output end. When the main circuit is on, the detection isolation module disconnects the circuit for detecting the load at the output end; if the voltage parameters are normal, the detection isolation module outputs the first weak electricity to detect whether there is a load at the output end: if there is no load at the output end, the main control module disconnects the driving current for driving the main circuit isolation module by controlling the first driving module, and the main circuit isolation module remains in the off state, so that the main circuit remains in the off state; if there is a load at the output end, the detection isolation module detects the load information of the output end through the first weak electricity and sends the load information to the main control module.

9. The control method according to claim 8, wherein The main control module receives the load information and compares the load information with the human body resistance range: if the load information is within the human body resistance range, the main control module disconnects the driving current for driving the main circuit isolation module by controlling the first driving module, and the main circuit isolation module remains in the off state, so that the main circuit remains in the off state; if the load information is not within the human body resistance range, the detection module performs a warning process on the load at the output end by outputting the second weak electricity.

10. The control method according to claim 9, characterized in that, After "the detection module performs a warning process on the load at the output end by outputting the second weak electricity", it further includes that the detection isolation module identifies whether there is a load at the output end: If there is a load at the output end, the main control module determines that there is no human contact at the output end, the detection and isolation module disconnects the circuit for detecting the load at the output end, the main control module drives the driving current of the main circuit isolation module by controlling the first driving module to conduct, and the main circuit isolation module remains in a closed state to keep the main circuit in a conducting state; If there is no load at the output end, the main control module determines that there is human contact at the output end, and by controlling the first driving module to continue to disconnect the driving current for driving the main circuit isolation module, the main circuit isolation module remains in an open state to keep the main circuit in an open state.

11. The control method according to claim 10, characterized in that, After the main circuit is conducted, it further includes: The isolation current detection module monitors whether the current parameters of the main circuit are normal: If the current parameters are abnormal, the main control module continues to disconnect the driving current for driving the main circuit isolation module by controlling the first driving module, and the main circuit isolation module remains in an open state to keep the main circuit in an open state.

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