Socket leakage protection system and intelligent socket
By using the first coil and the second coil in the smart socket to detect the current and magnetic field direction, combined with the leakage detection circuit and the relay control circuit, the problem of large size and high cost of leakage protection devices in the smart socket is solved, and high intelligence leakage protection and low-cost design are achieved.
Patent Information
- Application Number
- CN202422217618.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-11
- Publication Date
- 2025-08-26
- Estimated Expiration
- 2034-09-11
AI Technical Summary
Most existing smart sockets do not have leakage protection devices, or there are problems such as large size, high cost and poor control effect, resulting in poor user experience and safety hazards.
The first coil and the second coil are used to detect the current direction and magnetic field direction of the zero-fire contact, and are connected to the control center through the leakage detection circuit and the relay control circuit, so that the leakage protection of the intelligent socket is realized, and the control method is intelligent and does not occupy too much space.
It realizes high-intelligence leakage protection, reduces production costs and does not increase the volume of the socket, and improves user safety and experience.
Smart Images
Figure CN223273846U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of leakage protection, and in particular relates to a socket leakage protection system and an intelligent socket. Background Art
[0002] Most of the existing smart sockets do not have leakage protection devices installed inside them. The few smart sockets that are equipped with leakage protection devices also have problems such as large size and high cost. In addition, the control effect of the existing leakage protection system for smart sockets is very poor and the intelligence level is not high, resulting in a poor user experience and certain safety hazards. Utility Model Content
[0003] The purpose of the present utility model is to provide a socket leakage protection system and an intelligent socket. The control method of the leakage protection of the socket leakage protection system is highly intelligent, and when applied to the intelligent socket, it will not be too large in size and occupy too much space, thereby reducing production costs.
[0004] In order to achieve the above-mentioned purpose of the utility model, the technical solution adopted by the utility model is as follows:
[0005] A socket leakage protection system, comprising:
[0006] A first coil and a second coil, both of which can be sleeved outside the zero and fire contacts of the socket; the first coil and the second coil have mutual inductance;
[0007] A control center, the control center being connectable to the relay of the socket;
[0008] A leakage detection circuit and a relay control circuit, wherein the first coil is electrically connected to an input end of the leakage detection circuit, the second coil is electrically connected to an input end of the relay control circuit, and the output end of the leakage detection circuit and the output end of the relay control circuit are both connected to the control center.
[0009] This utility model provides a socket leakage protection system. Using a first coil and a second coil, the system detects the current direction and magnetic field direction of the socket's neutral and live contacts. If the magnetic field direction of either the neutral or live wire changes during use, the leakage detection circuit sends a leakage signal to a control center. Simultaneously, the relay control circuit sends a control signal to the control center, causing it to shut off the relay, thus providing leakage protection for the smart socket. This control method is highly intelligent and, when applied to smart sockets, eliminates the need for excessive bulk and space occupation, thereby reducing production costs.
[0010] Preferably, the control center includes a control chip; the control chip includes a leakage detection interface; the leakage detection circuit includes a leakage detection chip, a first resistor, a first capacitor, and a first transistor; the leakage detection chip includes a first interface; the first interface and the base of the first transistor are electrically connected and the first resistor is arranged between them; the node between the first resistor and the first interface and the ground wire are electrically connected and the first capacitor is arranged between them; the collector of the first transistor and the leakage detection interface are electrically connected; the emitter of the first transistor is grounded; and the first transistor is an NPN transistor.
[0011] The utility model provides a socket leakage protection system. Through this configuration, the leakage detection chip can send a signal to the control chip through the first interface.
[0012] Preferably, the leakage detection circuit also includes a second resistor, a third resistor, a fourth resistor, a rectifier diode, and a second capacitor; the leakage detection chip includes a second interface and a third interface; one end of the first coil is electrically connected to the second interface; a first node, a second node, and a third node are sequentially arranged between one end of the first coil and the second interface; the other end of the first coil is electrically connected to the third interface; a fourth node, a fifth node, and a sixth node are sequentially arranged between the other end of the first coil and the third interface; the second resistor is arranged between the first node and the fourth node; the rectifier diode is arranged between the second node and the fifth node; the third resistor is arranged between the second node and the third node; the fourth resistor is arranged between the fifth node and the sixth node; and the second capacitor is arranged between the third node and the sixth node.
[0013] The utility model provides a socket leakage protection system. Through this arrangement, the first coil can pass the detected neutral and live wire current directions to the leakage detection chip through the second interface and the third interface.
[0014] Preferably, the leakage detection circuit also includes a third capacitor, a fourth capacitor, a fifth capacitor, a fifth resistor, and a first input voltage; the leakage detection chip also includes a fourth interface, a fifth interface, a sixth interface, and a seventh interface; one end of the first input voltage is electrically connected to the fourth interface and the fifth resistor is arranged therebetween, the other end of the first input voltage is electrically connected to the fifth interface and the fourth capacitor and the fifth capacitor are arranged therebetween in sequence; a seventh node is arranged between the fourth capacitor and the fifth capacitor; one end of the third capacitor is electrically connected to the sixth interface; one end of the seventh node is electrically connected to the other end of the third capacitor; the other end of the seventh node is grounded; and the seventh interface is grounded.
[0015] The socket leakage protection system of the present invention can supply the first input voltage to the leakage detection chip through this arrangement, thereby ensuring that the leakage detection chip is in a working state.
[0016] Preferably, the control chip also includes a relay control interface; the relay control circuit includes a second input voltage, a second transistor, a sixth resistor, and a seventh resistor; the relay control interface is electrically connected to the base of the second transistor and the sixth resistor is arranged between them; an eighth node is arranged between the sixth resistor and the base of the second transistor; the eighth node is electrically connected to the ground wire and the seventh resistor is arranged between them; the second input voltage is electrically connected to the collector of the second transistor; the second transistor is an NPN transistor.
[0017] The utility model provides a socket leakage protection system. Through this arrangement, the control chip can receive a signal from the relay control circuit through the relay control interface.
[0018] Preferably, the relay control circuit also includes a diode; the diode is arranged between the second input voltage and the collector of the second transistor, and the anode of the diode is electrically connected to the collector of the second transistor, and the cathode of the diode is electrically connected to the second input voltage.
[0019] Preferably, a ninth node is provided between the positive electrode of the diode and the collector of the second transistor; a tenth node is provided between the negative electrode of the diode and the second input voltage; the tenth node is electrically connected to one end of the second coil; and the ninth node is electrically connected to the other end of the second coil.
[0020] The utility model provides a socket leakage protection system. Through this arrangement, the relay control circuit can obtain the direction of the neutral and live wire currents detected by the second coil.
[0021] The utility model also provides an intelligent socket, including the above-mentioned socket leakage protection system; the zero-fire contact includes an input contact and an output contact; the input contact is located between the first coil and the second coil; the output contact is located between the input contact and the second coil.
[0022] The smart socket of the utility model can detect the direction of the current after the neutral and live wires of the smart socket are connected through the coil through this arrangement, and can detect in time when the magnetic field of the neutral and live wires of the smart socket changes.
[0023] Preferably, the smart socket further includes a live wire input terminal and a neutral wire input terminal; the input contact connects or disconnects the live wire input terminal and the neutral wire input terminal.
[0024] The utility model provides a smart socket with such a setting that the input contact is equivalent to a connection switch between the live wire input terminal and the neutral wire input terminal. When no electrical device is inserted between the live wire input terminal and the neutral wire input terminal, the input contact is closed, and the live wire input terminal and the neutral wire input terminal are not connected; when an electrical device is inserted between the live wire input terminal and the neutral wire input terminal, the input contact is closed, and the live wire input terminal and the neutral wire input terminal are connected.
[0025] Preferably, the smart socket further includes a live wire output terminal and a neutral wire output terminal; the output contact connects or disconnects the live wire output terminal and the neutral wire output terminal.
[0026] The utility model provides an intelligent socket. With this arrangement, the output contact is equivalent to a connection switch between the live wire output terminal and the neutral wire output terminal. When no electrical device is inserted between the live wire output terminal and the neutral wire output terminal, the output contact is closed, and the live wire output terminal and the neutral wire output terminal are not connected; when an electrical device is inserted between the live wire output terminal and the neutral wire output terminal, the output contact is closed, and the live wire output terminal and the neutral wire output terminal are connected.
[0027] Beneficial effects:
[0028] This utility model provides a socket leakage protection system and smart socket. A first coil and a second coil detect the current direction and magnetic field direction of the neutral and live contacts. During use, if the magnetic field direction of the neutral or live wire changes, the first coil conducts the leakage detection circuit. Upon receiving the leakage signal, the control center deactivates the relay via the relay control circuit and the second coil, thus providing leakage protection for the smart socket. This control method is highly intelligent and, when applied to smart sockets, does not result in excessive bulk or space occupation, thereby reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] Figure 1 FIG2 is a circuit connection diagram of a socket leakage protection system according to an embodiment;
[0030] Figure 2 FIG2 is a schematic structural diagram of a control chip of a socket leakage protection system according to an embodiment;
[0031] Figure 3 Shown is a schematic diagram of a partial structure of a smart socket according to an embodiment;
[0032] Figure 4 Shown Figure 3 Top view of .
[0033] Reference numerals
[0034] 10. First coil; 20. Second coil; 30. Live wire input; 40. Live wire output; 50. Neutral wire input; 60. Neutral wire output; 70. Pin; 80. Leakage detection chip; 90. Control chip. DETAILED DESCRIPTION
[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without inventive work.
[0036] The technical solution of the present utility model is described in detail below with reference to specific embodiments.
[0037] Example 1
[0038] like Figures 1-2 As shown, a socket leakage protection system of this embodiment includes:
[0039] The first coil 10 and the second coil 20 can be sleeved on the outside of the zero and fire contacts of the socket; the first coil 10 and the second coil 20 are mutually inductive;
[0040] Control center, which can be connected to the relay of the socket;
[0041] The leakage detection circuit and the relay control circuit, the first coil 10 is electrically connected to the input end of the leakage detection circuit, the second coil 20 is electrically connected to the input end of the relay control circuit, and the output end of the leakage detection circuit and the output end of the relay control circuit are both connected to the control center.
[0042] This embodiment of the socket leakage protection system uses a first coil 10 and a second coil 20 to detect the current direction and magnetic field direction of the neutral and live contacts. During use of the smart socket, if the magnetic field direction of either the live or neutral wire changes, the leakage detection circuit sends a leakage signal to the control center. Simultaneously, the relay control circuit sends a control signal to the control center, causing it to shut off the relay, thus providing leakage protection for the smart socket. This control method is highly intelligent and, when applied to smart sockets, does not result in excessive bulk or space occupation, thereby reducing production costs.
[0043] Preferably, the control center includes a control chip 90; the control chip 90 includes a leakage detection interface; the leakage detection circuit includes a leakage detection chip 80, a first resistor R1, a first capacitor C1, and a first transistor Q1; the leakage detection chip 80 includes a first interface; the first interface and the base of the first transistor Q1 are electrically connected and a first resistor R1 is arranged between them; the node between the first resistor R1 and the first interface and the ground wire are electrically connected and a first capacitor C1 is arranged between them; the collector of the first transistor Q1 is electrically connected to the leakage detection interface; the emitter of the first transistor Q1 is grounded; the first transistor Q1 is an NPN transistor.
[0044] In the socket leakage protection system of this embodiment, through this configuration, the leakage detection chip 80 can send a signal to the control chip 90 through the first interface.
[0045] Preferably, the leakage detection circuit also includes a second resistor R2, a third resistor R3, a fourth resistor R4, a rectifier diode, and a second capacitor C2; the leakage detection chip 80 includes a second interface and a third interface; one end of the first coil 10 is electrically connected to the second interface; a first node, a second node, and a third node are sequentially arranged between one end of the first coil 10 and the second interface; the other end of the first coil 10 is electrically connected to the third interface; a fourth node, a fifth node, and a sixth node are sequentially arranged between the other end of the first coil 10 and the third interface; the second resistor R2 is arranged between the first node and the fourth node; the rectifier diode is arranged between the second node and the fifth node; the third resistor R3 is arranged between the second node and the third node; the fourth resistor R4 is arranged between the fifth node and the sixth node; and the second capacitor C2 is arranged between the third node and the sixth node.
[0046] In the socket leakage protection system of this embodiment, through this configuration, the first coil 10 can pass the detected neutral and live wire current directions to the leakage detection chip 80 through the second interface and the third interface.
[0047] Preferably, the leakage detection circuit also includes a third capacitor C4, a fourth capacitor C4, a fifth capacitor C5, a fifth resistor R5, and a first input voltage; the leakage detection chip 80 also includes a fourth interface, a fifth interface, a sixth interface, and a seventh interface; one end of the first input voltage is electrically connected to the fourth interface and a fifth resistor R5 is arranged therebetween, the other end of the first input voltage is electrically connected to the fifth interface and a fourth capacitor C4 and a fifth capacitor C5 are arranged therebetween in sequence; a seventh node is provided between the fourth capacitor C4 and the fifth capacitor C5; one end of the third capacitor C3 is electrically connected to the sixth interface; one end of the seventh node is electrically connected to the other end of the third capacitor C3; the other end of the seventh node is grounded; and the seventh interface is grounded.
[0048] The socket leakage protection system of this embodiment can supply the first input voltage to the leakage detection chip 80 through this configuration, thereby ensuring that the leakage detection chip 80 is in a working state.
[0049] Preferably, the control chip 90 also includes a relay control interface; the relay control circuit includes a second input voltage, a second transistor Q2, a sixth resistor R6, and a seventh resistor R7; the relay control interface is electrically connected to the base of the second transistor Q2 and a sixth resistor R6 is arranged between them; an eighth node is arranged between the sixth resistor R6 and the base of the second transistor Q2; the eighth node is electrically connected to the ground wire and a seventh resistor R7 is arranged between them; the second input voltage is electrically connected to the collector of the second transistor Q2; the second transistor Q2 is an NPN transistor.
[0050] In the socket leakage protection system of this embodiment, through this configuration, the control chip 90 can receive the signal of the relay control circuit through the relay control interface.
[0051] Preferably, the relay control circuit further includes a diode D1; the diode D1 is arranged between the second input voltage and the collector of the second transistor Q2, and the anode of the diode D1 is electrically connected to the collector of the second transistor Q2, and the cathode of the diode D1 is electrically connected to the second input voltage.
[0052] Preferably, a ninth node is provided between the anode of the diode D1 and the collector of the second transistor Q2; a tenth node is provided between the cathode of the diode D1 and the second input voltage; the tenth node is electrically connected to one end of the second coil 20; and the ninth node is electrically connected to the other end of the second coil 20.
[0053] In the socket leakage protection system of this embodiment, through this configuration, the relay control circuit can obtain the direction of the neutral and live wire currents detected by the second coil 20 .
[0054] Example 2
[0055] like Figures 3-4 As shown, this embodiment provides a smart socket, including a socket leakage protection system of embodiment one.
[0056] Preferably, the zero-fire contact includes an input contact and an output contact; the input contact is located between the first coil 10 and the second coil 20 ; and the output contact is located between the input contact and the second coil 20 .
[0057] The smart socket of this embodiment can detect the direction of the current after the neutral and live wires of the smart socket are connected through this configuration, and can detect changes in the magnetic field of the neutral and live wires of the smart socket in a timely manner.
[0058] Preferably, the smart socket further includes a live wire input terminal 30 and a neutral wire input terminal 50 ; the input contacts connect or disconnect the live wire input terminal 30 and the neutral wire input terminal 50 .
[0059] In the smart socket of this embodiment, through this configuration, the input contact acts as a connection switch between the live input terminal 30 and the neutral input terminal 50. When no electrical device is inserted between the live input terminal 30 and the neutral input terminal 50, the input contact is closed, and the live input terminal 30 and the neutral input terminal 50 are disconnected; when an electrical device is inserted between the live input terminal 30 and the neutral input terminal 50, the input contact is closed, and the live input terminal 30 and the neutral input terminal 50 are connected.
[0060] Preferably, the smart socket further includes a live wire output terminal 40 and a neutral wire output terminal 60 ; the output contacts connect or disconnect the live wire output terminal 40 and the neutral wire output terminal 60 .
[0061] In the smart socket of this embodiment, through this configuration, the output contact acts as a connection switch between the live wire output terminal 40 and the neutral wire output terminal 60. When no electrical device is inserted between the live wire output terminal 40 and the neutral wire output terminal 60, the output contact is closed, and the live wire output terminal 40 and the neutral wire output terminal 60 are disconnected; when an electrical device is inserted between the live wire output terminal 40 and the neutral wire output terminal 60, the output contact is closed, and the live wire output terminal 40 and the neutral wire output terminal 60 are connected.
[0062] Specifically, the smart socket of this embodiment includes multiple jacks, each two jacks form a group for inserting electrical devices, and each group of jacks includes the neutral and live wire input terminals 30 and output terminals of this embodiment. When an electrical device is inserted into a group of jacks, the input contacts and output contacts of the jacks are closed, the neutral wire and the live wire are both conductive, and the first coil 10 and the second coil 20 can adhere to the current direction and magnetic field direction of the conductive neutral and live wires.
[0063] Furthermore, when the magnetic field directions of the neutral wire and the live wire change, it indicates that there is a leakage hazard during the power-on operation of the electrical equipment. At this time, the leakage detection circuit and the relay control circuit both send signals to the control chip 90, causing the control center to turn off the relay to achieve leakage protection for the smart socket.
[0064] Specifically, if Figure 2 As shown, the leakage detection interface of the control chip 90 of this embodiment is PC13, and the relay control interface is RLY3; the control chip 90 also includes interface No. 1 and interface No. 8; one end of interface No. 1 needs to provide a 3.3V input voltage, and the other end of interface No. 1 is grounded and connected in series with capacitor C6; interface No. 8 is grounded.
[0065] Specifically, if Figure 1As shown, TP1 is a relay. The 3.3V input voltage is simultaneously supplied to the collector of the first transistor, relay TP1, and the leakage detection interface PC13. In this embodiment, both the first and second input voltages are 5V. The rectifier diode is a BAV99, which is conventional and will not be described in detail here.
[0066] Furthermore, the neutral and live contacts of this embodiment are 5V contacts. When the magnetic field of the neutral wire or the live wire changes, the control chip 90 receives signals from the leakage detection circuit and the relay control circuit, and outputs a high level to the leakage detection interface PC13. The leakage detection interface PC13 outputs a low level to the relay pin 70 to turn off the relay.
[0067] Furthermore, if Figure 3 The figure shows a schematic structural diagram of the first coil 10 and the second coil 20 of this embodiment being sleeved outside the neutral contact, wherein four relay pins 70 penetrate the first coil 10 and the second coil 20 in pairs.
[0068] Specifically, a smart socket of this embodiment adds a set of detection coils to the relay, and the coils are used to detect the balance direction of the neutral and live wire magnetic fields externally, and then detect whether the neutral and live wire currents are balanced. If the input and output of the neutral or live wire currents are unbalanced, it is determined that the electrical equipment is leaking, and the relay is immediately turned off through the control center.
[0069] Specifically, a smart socket of this embodiment can realize leakage protection of the smart socket by adding a set of detection coils and a small number of peripheral components to the relay, without adding other devices such as complex mutual inductance coils, thereby achieving low-cost leakage protection.
[0070] The above describes in detail the embodiments of the socket leakage protection system and the smart socket provided by the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only intended to help understand the core concept of the present invention. It should be noted that, for those skilled in the art, without departing from the principles of the present invention, the present invention can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.
Claims
1. A socket leakage protection system, characterized in that: include: A first coil (10) and a second coil (20), wherein the first coil (10) and the second coil (20) can be sleeved outside the neutral contact of the socket; the first coil (10) and the second coil (20) have mutual inductance; A control center, the control center being connectable to the relay of the socket; A leakage detection circuit and a relay control circuit, wherein the first coil (10) is electrically connected to an input end of the leakage detection circuit, the second coil (20) is electrically connected to an input end of the relay control circuit, and the output end of the leakage detection circuit and the output end of the relay control circuit are both connected to the control center.
2. The socket leakage protection system according to claim 1, characterized in that: The control center includes a control chip (90); the control chip (90) includes a leakage detection interface; the leakage detection circuit includes a leakage detection chip (80), a first resistor, a first capacitor, and a first transistor; the leakage detection chip (80) includes a first interface; the first interface is electrically connected to the base of the first transistor, and the first resistor is arranged between them; the node between the first resistor and the first interface is electrically connected to the ground line, and the first capacitor is arranged between them; the collector of the first transistor is electrically connected to the leakage detection interface; the emitter of the first transistor is grounded; and the first transistor is an NPN transistor.
3. The socket leakage protection system according to claim 2, characterized in that: The leakage detection circuit further comprises a second resistor, a third resistor, a fourth resistor, a rectifier diode, and a second capacitor; the leakage detection chip (80) comprises a second interface and a third interface; one end of the first coil (10) is electrically connected to the second interface; a first node, a second node, and a third node are sequentially arranged between one end of the first coil (10) and the second interface; the other end of the first coil (10) is electrically connected to the third interface; a fourth node, a fifth node, and a sixth node are sequentially arranged between the other end of the first coil (10) and the third interface; the second resistor is arranged between the first node and the fourth node; the rectifier diode is arranged between the second node and the fifth node; the third resistor is arranged between the second node and the third node; the fourth resistor is arranged between the fifth node and the sixth node; and the second capacitor is arranged between the third node and the sixth node.
4. The socket leakage protection system according to claim 3, characterized in that: The leakage detection circuit further includes a third capacitor, a fourth capacitor, a fifth capacitor, a fifth resistor, and a first input voltage; the leakage detection chip (80) further includes a fourth interface, a fifth interface, a sixth interface, and a seventh interface; one end of the first input voltage is electrically connected to the fourth interface, with the fifth resistor disposed therebetween; the other end of the first input voltage is electrically connected to the fifth interface, with the fourth capacitor and the fifth capacitor disposed therebetween in sequence; a seventh node is disposed between the fourth capacitor and the fifth capacitor; one end of the third capacitor is electrically connected to the sixth interface; One end of the seventh node is electrically connected to the other end of the third capacitor; the other end of the seventh node is grounded; and the seventh interface is grounded.
5. The socket leakage protection system according to claim 2, characterized in that: The control chip (90) further comprises a relay control interface; the relay control circuit comprises a second input voltage, a second transistor, a sixth resistor, and a seventh resistor; the relay control interface is electrically connected to the base of the second transistor, with the sixth resistor disposed therebetween; an eighth node is disposed between the sixth resistor and the base of the second transistor; the eighth node is electrically connected to a ground line, with the seventh resistor disposed therebetween; the second input voltage is electrically connected to the collector of the second transistor; and the second transistor is an NPN transistor.
6. The socket leakage protection system according to claim 5, characterized in that: The relay control circuit also includes a diode; the diode is arranged between the second input voltage and the collector of the second transistor, and the anode of the diode is electrically connected to the collector of the second transistor, and the cathode of the diode is electrically connected to the second input voltage.
7. The socket leakage protection system according to claim 6, characterized in that: A ninth node is provided between the anode of the diode and the collector of the second transistor; a tenth node is provided between the cathode of the diode and the second input voltage; the tenth node is electrically connected to one end of the second coil (20); and the ninth node is electrically connected to the other end of the second coil (20).
8. A smart socket, characterized in that: It comprises a socket leakage protection system as described in any one of claims 1 to 7; the neutral contact comprises an input contact and an output contact; the input contact is located between the first coil (10) and the second coil (20); the output contact is located between the input contact and the second coil (20).
9. The smart socket according to claim 8, characterized in that: The smart socket further comprises a live wire input terminal (30) and a neutral wire input terminal (50); the input contact connects or disconnects the live wire input terminal (30) and the neutral wire input terminal (50).
10. The smart socket according to claim 8, characterized in that: The smart socket further comprises a live wire output terminal (40) and a neutral wire output terminal (60); the output contact connects or disconnects the live wire output terminal (40) and the neutral wire output terminal (60).