Power socket wiring detection circuit and electric appliance

Abstract

The invention discloses a power socket wiring detection circuit and an electric appliance. The power socket detection circuit comprises a detection circuit, a processing circuit and a communication circuit. Wherein the detection circuit is respectively connected with the power socket and the processing circuit, and the communication circuit is respectively connected with the processing circuit and a master control system of an electric appliance; the detection circuit is used for detecting a wiring signal of the power socket; and the processing circuit is used for determining whether the power socket has a wiring fault according to the wiring signal, and sending fault information to the main control system through the communication circuit under the condition that the wiring fault exists. According to the embodiment of the invention, the wiring of the power socket can be actively detected through the electric appliance in the process of using the electric appliance.

Description

Technical Field

[0001] The present application relates to the field of electrical appliance technology, and in particular to a power socket wiring detection circuit and an electrical appliance. Background Art

[0002] Power sockets play an extremely important role in daily life. For example, several power sockets are installed in houses to supply power to home appliances. However, there may be some faults in the wiring of these power sockets. For example, when installing or repairing the power socket, there may be wrong connections or missed connections. If the user directly plugs the home appliance into the power socket without knowing that the power socket is faulty, the home appliance may not operate normally at best, or even threaten the user's personal safety. Summary of the invention

[0003] The embodiment of the present application discloses a power socket wiring detection circuit and an electrical appliance, which can actively detect the power socket wiring through the electrical appliance during the use of the electrical appliance.

[0004] In a first aspect, an embodiment of the present application discloses a power socket detection circuit, the power socket detection includes a detection circuit, a processing circuit and a communication circuit, wherein:

[0005] The detection circuit is connected to the power socket and the processing circuit respectively, and the communication circuit is connected to the processing circuit and the electrical appliance respectively;

[0006] A detection circuit, used for detecting a wiring signal of a power socket;

[0007] The processing circuit is used to determine whether there is a wiring fault in the power socket according to the wiring signal, and in the case of a wiring fault, send fault information to the electrical appliance through the communication circuit.

[0008] In a second aspect, an embodiment of the present application discloses an electrical appliance, which includes the above-mentioned power socket detection circuit.

[0009] In the embodiment of the present application, the power socket detection circuit includes a detection circuit, a processing circuit and a communication circuit. The detection circuit is respectively connected to the power socket and the processing circuit, and the communication circuit is respectively connected to the processing circuit and the electrical appliance; the detection circuit is used to detect the wiring signal of the power socket; the processing circuit is used to determine whether there is a wiring fault in the power socket according to the wiring signal, and in the case of a wiring fault, the fault information is sent to the electrical appliance through the communication circuit. In this way, the wiring of the power socket can be actively detected by the electrical appliance during the use of the electrical appliance. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0011] Figure 1 It is a structural schematic diagram of a power socket wiring detection circuit disclosed in an embodiment of the present application;

[0012] Figure 2 It is a structural schematic diagram of a power socket wiring detection circuit disclosed in an embodiment of the present application;

[0013] Figure 3 It is a structural schematic diagram of another power socket wiring detection circuit disclosed in an embodiment of the present application;

[0014] Figure 4 yes Figure 3 A structural schematic diagram of another power socket wiring detection circuit disclosed in the embodiment;

[0015] Figure 5 It is a structural schematic diagram of another power socket wiring detection circuit disclosed in an embodiment of the present application;

[0016] Figure 6 It is a structural schematic diagram of another power socket wiring detection circuit disclosed in an embodiment of the present application;

[0017] Figure 7 It is a structural schematic diagram of another power socket wiring detection circuit disclosed in an embodiment of the present application;

[0018] Figure 8 It is a structural schematic diagram of another power socket wiring detection circuit disclosed in an embodiment of the present application;

[0019] Fig. 9 It is a structural schematic diagram of an electrical appliance disclosed in an embodiment of the present application. DETAILED DESCRIPTION

[0020] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0021] In order to enable those skilled in the art to better understand the solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application.

[0022] With the emergence of various electrical products, the demand for power sockets in daily life is increasing, and power sockets can be seen everywhere in people's living environment. For example, several power sockets are installed in the house to supply power to home appliances. However, there may be some faults in the wiring of these power sockets. For example, when installing or repairing the power socket, there may be wrong connections or missed connections. If the user directly plugs the home appliance into the power socket without knowing the fault of the power socket, it may cause the home appliance to not operate normally at the least, or even threaten the user's personal safety.

[0023] In order to solve the above problems, the present application discloses a power socket detection circuit, which can detect the wiring status of the power socket, determine whether there is a wiring fault in the power socket according to the wiring status, and send fault information to the electrical appliance in the case of a wiring fault. It can be seen that the power socket wiring can be actively detected by the electrical appliance during the use of the electrical appliance. In addition, the electrical appliance can output prompt information for prompting the user of the power socket fault based on the fault information detected by the power socket detection circuit, so that the user can promptly discover the power socket fault according to the prompt information, and then promptly repair the power socket.

[0024] See also Figure 1 , Figure 1 Schematic diagram of a power socket wiring detection circuit disclosed in an embodiment of the present application. Figure 1 As shown, the power socket wiring detection circuit may include a detection circuit, a processing circuit and a communication circuit.

[0025] The detection circuit is respectively connected to the power socket and the processing circuit, and the communication circuit is respectively connected to the processing circuit and the main control system of the electrical appliance.

[0026] The detection circuit can detect the wiring signal of the power socket. The wiring signal of the power socket refers to the wiring signal between the live wire, the neutral wire and the ground wire in the power socket.

[0027] The processing circuit can determine whether there is a wiring fault in the power socket according to the wiring signal of the power socket. If there is a wiring fault, the fault information can be sent to the main control system through the communication circuit.

[0028] The electrical appliance may include a power cord and a plug. When the plug of the electrical appliance is inserted into a power socket, the detection circuit may detect whether there is a fault in the wiring of the power socket and may output a wiring signal. The processing circuit may receive the wiring signal and determine whether there is a wiring fault in the power socket. When there is a wiring fault in the power socket, the processing circuit may output fault information. The communication circuit may receive the fault information and send the fault information to the electrical appliance. The main control system may receive the fault information and may generate prompt information for prompting the user that there is a fault in the power socket based on the fault information, and may further output prompt information to prompt the user. The main control system may output the prompt information by voice, display screen, etc. The prompt information may include specific fault information.

[0029] exist Figure 1 In the described embodiment, the detection circuit can detect the wiring signal of the power socket. When it is determined that the power socket has a fault, the processing circuit can send the fault information to the main control system of the electrical appliance through the communication circuit. The main control system can generate corresponding prompt information based on the fault information, thereby reminding the user that the power socket has a wiring fault. When the main control system receives the fault information, it can also control the electrical appliance to cut off the connection with the power socket to protect the electrical appliance from damage, while also ensuring the personal safety of the user.

[0030] See also Figure 2 , Figure 2 : is a schematic diagram of another power socket wiring detection circuit disclosed in an embodiment of the present application. Figure 2 The power socket wiring detection circuit shown is composed of Figure 1 The power socket wiring detection circuit shown is optimized. Figure 2 As shown, the power socket wiring detection circuit may also include a control circuit and a drive circuit.

[0031] The driving circuit is connected to the processing circuit and the control circuit respectively, and the control circuit is connected to the detection circuit and the power socket respectively.

[0032] The processing circuit can also send a control signal to the driving circuit. The control signal can be generated by the processing circuit or by the main control system of the electrical appliance. The control signal can be a signal for the control detection circuit to start detection or a signal for the control detection circuit to end detection.

[0033] In the case where the control signal is generated by the processing circuit, the processing circuit can generate a control signal to control the detection circuit to start detection when it detects that the plug of the appliance is connected to the power socket. When it is determined that the power socket is not faulty, it can generate a control signal to control the detection circuit to end detection, which can avoid the detection circuit from continuing to detect and increasing the power consumption of the appliance.

[0034] In the case where the control signal is generated by the main control system of the electrical appliance, the main control system may send the control signal to the power socket wiring detection circuit through the communication circuit. The main control system may send the control signal to the power socket wiring detection circuit at preset intervals, or may send the control signal to the power socket wiring detection circuit when the plug of the electrical appliance is reinserted into the socket. The preset time may be set according to actual needs, and may be set by the manufacturer or by the user.

[0035] After receiving the control signal, the processing circuit may send the control signal to the driving circuit.

[0036] After the driving circuit receives the control signal sent by the processing circuit, the control circuit can be controlled according to the control signal. Controlling the control circuit can be understood as controlling the state of the control circuit. The state of the control circuit can be a working state and a non-working state. Controlling the control circuit can be controlling the control circuit to start working so that the control circuit is in a working state; or it can be controlling the control circuit to end working so that the control circuit is in a non-working state.

[0037] The control circuit can control the detection state of the detection circuit. The detection state of the detection circuit can be understood as the working state of the detection circuit, or it can be the non-working state of the detection circuit. The detection state of the detection circuit is determined according to the working state of the control circuit. When the state of the control circuit is the working state, the detection state of the detection circuit is the working state, that is, the state of detection; when the state of the control circuit is the non-working state, the detection state of the detection circuit is the non-working state, that is, the state of no detection. The detection state of the detection circuit can be switched with the switching of the state of the control circuit. Exemplarily, when the control circuit starts to work, the detection state of the detection circuit is switched from the non-working state to the working state; when the control circuit ends working, the detection state of the detection circuit is switched from the working state to the non-working state.

[0038] The detection circuit can detect the wiring signal of the power socket. After the detection circuit is completed, it can output a wiring signal. The processing circuit can receive the wiring signal and determine whether the power socket has a wiring fault according to the wiring signal.

[0039] In the case where there is a wiring fault in the power socket, the processing circuit can output fault information. The communication circuit can receive the fault information and send the fault information to the main control system. The main control system can receive the fault information, and can generate corresponding prompt information according to the fault information, and then can output the prompt information to prompt the user. The main control system can output the prompt information through voice, display screen, etc. The prompt information may include specific fault information.

[0040] exist Figure 2In the described embodiment, the main control system of the electrical appliance can send a control signal to the processing circuit through the communication circuit. After receiving the control signal, the processing circuit can send the control signal to the driving circuit. After receiving the control signal, the driving circuit can control the working state of the control circuit, and then control the detection state of the detection circuit. The detection circuit can detect the wiring signal of the power socket. When it is determined that there is a fault in the power socket, the processing circuit can send the fault information to the main control system through the communication circuit. The main control system can generate corresponding prompt information based on the fault information, thereby reminding the user that there is a wiring fault in the power socket. When receiving the fault information, the main control system can also control the electrical appliance to cut off the connection with the power socket to protect the electrical appliance from damage, while also ensuring the personal safety of the user.

[0041] See also Figure 3 , Figure 3 This is a schematic diagram of the structure of another power socket wiring detection circuit disclosed in the embodiment of the present application. Figure 3 The power socket wiring detection circuit shown is composed of Figure 1 The power socket wiring detection circuit shown is optimized. Figure 3 As shown, the detection circuit may include a first detection circuit, a second detection circuit and a third detection circuit.

[0042] The first detection circuit is respectively connected to the live wire, the ground wire and the processing circuit, the second detection circuit is respectively connected to the live wire, the neutral wire and the processing circuit, and the third detection circuit is respectively connected to the neutral wire, the ground wire and the processing circuit.

[0043] The first detection circuit can detect the wiring signal of the live wire and the ground wire, the second detection circuit can detect the wiring signal of the live wire and the neutral wire, and the third detection circuit can detect the wiring signal of the neutral wire and the ground wire. The wiring signal of the live wire and the ground wire can be a signal flowing between the live wire and the ground wire. When the wiring of the live wire and the ground wire is normal, the wiring signal of the live wire and the ground wire is a high-level signal (i.e., a signal that is not 0); when the wiring of the live wire and the ground wire is abnormal, the wiring signal of the live wire and the ground wire is a low-level signal (i.e., a signal that is 0), that is, no current flowing between the live wire and the ground wire is detected. The wiring signal of the live wire and the neutral wire can be a signal flowing between the live wire and the neutral wire. When the wiring of the live wire and the neutral wire is normal, the wiring signal of the live wire and the neutral wire is a high-level signal (i.e., a signal that is not 0); when the wiring of the live wire and the neutral wire is abnormal, the wiring signal of the live wire and the neutral wire is a low-level signal (i.e., a signal that is 0), that is, no current flowing between the live wire and the neutral wire is detected. The wiring signal of the neutral wire and the ground wire can be a signal flowing between the neutral wire and the ground wire. When the connection between the neutral wire and the ground wire is normal, the connection signal between the neutral wire and the ground wire is a low-level signal (i.e., a signal of 0), that is, no current can be detected flowing between the neutral wire and the ground wire; when the connection between the neutral wire and the ground wire is abnormal, the connection signal between the live wire and the neutral wire is a high-level signal (i.e., a signal that is not 0).

[0044] The processing circuit can determine whether there is a wiring fault in the power socket according to the wiring signals detected by the first detection circuit, the second detection circuit and the third detection circuit. When the wiring signal detected by the first detection circuit is a high-level signal, the wiring signal detected by the second detection circuit is a high-level signal, and the wiring signal detected by the third detection circuit is a low-level signal, the processing circuit can determine that the live wire, the neutral wire and the ground wire are correctly connected. When the wiring signal detected by the first detection circuit is a low-level signal, the wiring signal detected by the second detection circuit is a high-level signal, and the wiring signal detected by the third detection circuit is a low-level signal, the processing circuit can determine that the ground wire is missing. When the wiring signal detected by the first detection circuit is a low-level signal, the wiring signal detected by the second detection circuit is a high-level signal, and the wiring signal detected by the third detection circuit is a high-level signal, the processing circuit can determine that the live wire and the neutral wire are connected incorrectly. When the wiring signal detected by the first detection circuit is a high-level signal, the wiring signal detected by the second detection circuit is a low-level signal, and the wiring signal detected by the third detection circuit is a low-level signal, the processing circuit can determine that the neutral wire is missing. When the wiring signal detected by the first detection circuit is a low-level signal, the wiring signal detected by the second detection circuit is a low-level signal, and the wiring signal detected by the third detection circuit is a low-level signal, the processing circuit can determine that the live wire is missing. When the wiring signal detected by the first detection circuit is a high-level signal, the wiring signal detected by the second detection circuit is a low-level signal, and the wiring signal detected by the third detection circuit is a high-level signal, the processing circuit can determine that the live wire and the ground wire are connected incorrectly.

[0045] exist Figure 3 In the described embodiment, the first detection circuit can detect the wiring signal of the live wire and the ground wire in the power socket, the second detection circuit can detect the wiring signal of the live wire and the neutral wire in the power socket, and the third detection circuit can detect the wiring signal of the neutral wire and the ground wire in the power socket. The processing circuit can determine whether there is a wiring fault in the power socket according to the wiring signal of the live wire and the ground wire, the wiring signal of the live wire and the neutral wire, and the wiring signal of the neutral wire and the ground wire. In the case of determining that there is a fault in the power socket, the processing circuit can send the fault information to the main control system of the electrical appliance through the communication circuit. The main control system can generate corresponding prompt information based on the fault information, thereby reminding the user that there is a wiring fault in the power socket. When receiving the fault information, the main control system can also control the electrical appliance to cut off the connection with the power socket to protect the electrical appliance from damage, while also ensuring the personal safety of the user.

[0046] See also Figure 4 , Figure 4 This is a schematic diagram of the structure of another power socket wiring detection circuit disclosed in the embodiment of the present application. Figure 4 The power socket wiring detection circuit shown is composed of Figure 2 and Figure 3 The power socket wiring detection circuit shown is optimized. Figure 4 As shown, the control circuit may include a first control circuit and a second control circuit.

[0047] The first control circuit is respectively connected to the live wire, the drive circuit, the first detection circuit and the second detection circuit, and the second control circuit is respectively connected to the neutral wire, the drive circuit and the third detection circuit.

[0048] The first control circuit can control the detection state of the first detection circuit and the second detection circuit. The first control circuit can control the detection state of the first detection circuit and the second detection circuit by controlling the on and off of the live wire. The second control circuit can control the detection state of the third detection circuit. The second control circuit can control the detection state of the third detection circuit by controlling the on and off of the neutral wire. The detection state of the first detection circuit, the second detection circuit and the third detection circuit can be understood as the working state of the first detection circuit, the second detection circuit and the third detection circuit, and can also be the non-working state of the first detection circuit, the second detection circuit and the third detection circuit.

[0049] The detection state of the first detection circuit and the second detection circuit is determined according to the working state of the first control circuit. When the state of the first control circuit is the working state, the detection state of the first detection circuit and the second detection circuit is the working state, that is, the state of detection; when the state of the first control circuit is the non-working state, the detection state of the first detection circuit and the second detection circuit is the non-working state, that is, the state of no detection. The detection state of the first detection circuit and the second detection circuit can be switched with the switching of the state of the first control circuit. Exemplarily, when the first control circuit starts to work, the detection state of the first detection circuit and the second detection circuit is switched from the non-working state to the working state; when the first control circuit ends working, the detection state of the first detection circuit and the second detection circuit is switched from the working state to the non-working state.

[0050] The detection state of the third detection circuit is determined according to the working state of the second control circuit. When the state of the second control circuit is the working state, the detection state of the third detection circuit is the working state, that is, the state of detection; when the state of the second control circuit is the non-working state, the detection state of the third detection circuit is the non-working state, that is, the state of no detection. The detection state of the third detection circuit can be switched with the switching of the state of the second control circuit. Exemplarily, when the second control circuit starts to work, the detection state of the third detection circuit is switched from the non-working state to the working state; when the second control circuit ends working, the detection state of the third detection circuit is switched from the working state to the non-working state.

[0051] exist Figure 4In the described embodiment, the main control system of the electrical appliance can send a control signal to the processing circuit through the communication circuit. After receiving the control signal, the processing circuit can send a control signal to the driving circuit. After receiving the control signal, the driving circuit can control the working state of the first control circuit, thereby controlling the detection states of the first detection circuit and the second detection circuit, and can also control the working state of the second control circuit, thereby controlling the detection state of the third detection circuit. The detection circuit can detect the wiring signal of the power socket. When it is determined that there is a fault in the power socket, the processing circuit can send the fault information to the main control system through the communication circuit. The main control system can generate corresponding prompt information based on the fault information, thereby reminding the user that there is a wiring fault in the power socket. When receiving the fault information, the main control system can control the electrical appliance to cut off the connection with the power socket to protect the electrical appliance from damage, while also ensuring the personal safety of the user.

[0052] See also Figure 5 , Figure 5 This is a schematic diagram of the structure of another power socket wiring detection circuit disclosed in the embodiment of the present application. Figure 5 The power socket wiring detection circuit shown is composed of Figure 3 The power socket wiring detection circuit shown is optimized.

[0053] like Figure 5 As shown, the first detection circuit may include a first diode D1, a first resistor R1, a first photocoupler U1, and a second resistor R2. The positive electrode of the first diode D1 is connected to the live wire, the negative electrode of the first diode D1 is connected to the positive input terminal of the first photocoupler U1 through the first resistor R1, the negative input terminal of the first photocoupler U1 is connected to the ground wire, the first output terminal of the first photocoupler U1 is connected to the power supply, the second output terminal of the first photocoupler U1 is respectively connected to one end of the second resistor R2 and the processing circuit, and the other end of the second resistor R2 is connected to the ground terminal.

[0054] When the live wire and the ground wire are connected normally, the first diode D1 is turned on, and the current will flow from the positive input terminal of the first photocoupler U1 through the negative input terminal of the first photocoupler U1. There is current in the loop where the first output terminal and the second output terminal of the first photocoupler U1 are located, and the current can flow into the processing circuit. When the processing circuit detects the current, it can be determined that the live wire and the ground wire are connected normally. When the live wire and the ground wire are connected abnormally, the first diode D1 is not turned on, no current passes through the first photocoupler U1, and there is no current in the loop where the first output terminal and the second output terminal of the first photocoupler U1 are located, and no current flows into the processing circuit. When the processing circuit does not detect the current, it can be determined that the live wire and the ground wire are connected abnormally.

[0055] like Figure 5As shown, the second detection circuit may include a second diode D2, a fourth resistor R4, a second photocoupler U2, and a fifth resistor R5. The anode of the second diode D2 is connected to the live wire, the cathode of the second diode D2 is connected to the anode input terminal of the second photocoupler U2 through the fourth resistor R4, the cathode input terminal of the second photocoupler U2 is connected to the neutral line, the first output terminal of the second photocoupler U2 is connected to the power supply, the second output terminal of the second photocoupler U2 is respectively connected to one end of the fifth resistor R5 and the processing circuit, and the other end of the fifth resistor R5 is connected to the ground terminal.

[0056] When the live and neutral wires are connected normally, the second diode D2 is turned on, and current will flow from the positive input terminal of the second photocoupler U2 through the negative input terminal of the second photocoupler U2. There is current in the loop where the first output terminal of the second photocoupler U2 and the second output terminal are located. This current can flow into the processing circuit. When the processing circuit detects the current, it can be determined that the live and neutral wires are connected normally. When the live and neutral wires are connected abnormally, the second diode D2 is not turned on, no current passes through the second photocoupler U2, there is no current in the loop where the first output terminal of the second photocoupler U2 and the second output terminal are located, and no current flows into the processing circuit. When the processing circuit does not detect the current, it can be determined that the live and neutral wires are connected abnormally.

[0057] like Figure 5 As shown, the third detection circuit may include a third diode D3, a seventh resistor R7, a third photocoupler U3, and an eighth resistor R8. The anode of the third diode D3 is connected to the neutral line, the cathode of the third diode D3 is connected to the anode input terminal of the third photocoupler U3 through the seventh resistor R7, the cathode input terminal of the third photocoupler U3 is connected to the ground line, the first output terminal of the third photocoupler U3 is connected to the power supply, the second output terminal of the third photocoupler U3 is respectively connected to one end of the eighth resistor R8 and the processing circuit, and the other end of the eighth resistor R8 is connected to the ground terminal.

[0058] When the neutral and ground wires are connected normally, the third diode D3 is turned on, no current passes through the third photocoupler U3, there is no current in the loop where the first output terminal and the second output terminal of the third photocoupler U3 are located, and no current flows into the processing circuit. When the processing circuit does not detect the current, it can be determined that the neutral and ground wires are connected normally. When the neutral and ground wires are connected abnormally, the current will flow from the positive input terminal of the third photocoupler U3 through the negative input terminal of the third photocoupler U3, and then there will be current in the loop where the first output terminal and the second output terminal of the third photocoupler U3 are located. The current can flow into the processing circuit. When the processing circuit detects the current, it can be determined that the neutral and ground wires are connected abnormally.

[0059] exist Figure 5In the described embodiment, the first detection circuit can detect the wiring signal of the live wire and the ground wire in the power socket, the second detection circuit can detect the wiring signal of the live wire and the neutral wire in the power socket, and the third detection circuit can detect the wiring signal of the neutral wire and the ground wire in the power socket. The processing circuit can determine whether there is a wiring fault in the power socket according to the wiring signal of the live wire and the ground wire, the wiring signal of the live wire and the neutral wire, and the wiring signal of the neutral wire and the ground wire. In the case of determining that there is a fault in the power socket, the processing circuit can send the fault signal to the main control system of the electrical appliance through the communication circuit. The main control system generates corresponding prompt information based on the fault information, thereby reminding the user that there is a wiring fault in the power socket. When the electrical appliance receives the fault signal, it can control the electrical appliance to cut off the connection with the power socket to protect the electrical appliance from damage, while also ensuring the personal safety of the user.

[0060] See also Figure 6 , Figure 6 This is a schematic diagram of the structure of another power socket wiring detection circuit disclosed in the embodiment of the present application. Figure 6 The power socket wiring detection circuit shown is composed of Figure 4 The power socket wiring detection circuit shown is optimized. Figure 6 As shown, the first control circuit may include a first relay, and the second control circuit may include a second relay.

[0061] The first end of the first relay K1 is connected to the power supply, the second end of the first relay K1 is connected to the drive circuit, the third end of the first relay K1 is connected to the live wire, and the fourth end of the first relay K1 is connected to the first detection circuit and the second detection circuit respectively. The first end of the second relay K2 is connected to the power supply, the second end of the second relay K2 is connected to the drive circuit, the third end of the second relay K2 is connected to the neutral wire, and the fourth end of the second relay K2 is connected to the third detection circuit. The first relay K1 can control the detection state of the first detection circuit and the second detection circuit; the second relay K2 can control the detection state of the third detection circuit.

[0062] The driving circuit can control the detection states of the first detection circuit and the second detection circuit by controlling the state of the first relay K1. The driving circuit can control the detection state of the third detection circuit by controlling the state of the second relay K2. The first signal of the first relay K1 and the second signal for controlling the second relay K2 can be controlled. Controlling the first relay K1 and the second relay K2 in sequence can prevent the current crosstalk phenomenon caused by controlling the first relay K1 and the second relay K2 at the same time.

[0063] exist Figure 6In the described embodiment, the main control system of the electrical appliance can send a control signal to the processing circuit through the communication circuit, and the processing circuit can send the control signal to the driving circuit after receiving the control signal. After receiving the control signal, the driving circuit can control the working state of the first control circuit, and then control the detection state of the first detection circuit and the second detection circuit, and can also control the working state of the second control circuit, and then control the detection state of the third detection circuit. The detection circuit can detect the wiring signal of the power socket, and when it is determined that the power socket has a fault, the processing circuit can send the fault information to the main control system through the communication circuit. The main control system can generate corresponding prompt information based on the fault information, so as to remind the user that the power socket has a wiring fault. When the main control system receives the fault information, it can control the electrical appliance to cut off the connection with the power socket to protect the electrical appliance from damage, while also ensuring the personal safety of the user.

[0064] See also Figure 7 , Figure 7 This is a schematic diagram of another power socket wiring detection circuit disclosed in the embodiment of the present application. Figure 7 The power socket wiring detection circuit shown is composed of Figure 6 The power socket wiring detection circuit shown is optimized.

[0065] like Figure 7 As shown, the power socket wiring detection circuit may further include a first fuse F1 and a second fuse F2, and the processing circuit may be an MCU. The first control circuit is connected to the live wire through the first fuse F1, and the second control circuit is connected to the neutral wire through the second fuse F2.

[0066] The fuse F1 is blown to protect the circuit when the current is greater than a certain value. Therefore, the first fuse F1 and the second fuse F2 can protect the power socket wiring detection circuit when the current is too large.

[0067] like Figure 7 As shown, the first detection circuit may further include a first light emitting diode DL1, a first capacitor C1 and a third resistor R3. The anode of the first light emitting diode DL1 is connected to the cathode of the first diode D1 through the first resistor R1, and the cathode of the first light emitting diode DL1 is connected to the anode input terminal of the first photocoupler U1. One end of the first capacitor C1 is connected to the second output terminal of the first photocoupler U1, and the other end of the first capacitor C1 is connected to the ground terminal. The first output terminal of the first photocoupler U1 is connected to the power supply through the third resistor R3.

[0068] When the live wire and the ground wire are connected normally, the first diode D1 and the first light-emitting diode DL1 are both turned on. When the live wire and the ground wire are connected abnormally, the first diode D1 and the first light-emitting diode DL1 are both turned off.

[0069] like Figure 7 As shown, the second detection circuit may further include a second light emitting diode DL2, a second capacitor C2 and a sixth resistor R6. The anode of the second light emitting diode DL2 is connected to the cathode of the second diode D2 through a fourth resistor R4, and the cathode of the second light emitting diode DL2 is connected to the positive input terminal of the second photoelectric coupler U2. One end of the second capacitor C2 is connected to the second output terminal of the second photoelectric coupler U2, and the other end of the second capacitor C2 is connected to the ground terminal. The first output terminal of the second photoelectric coupler U2 is connected to the power supply through the sixth resistor R6.

[0070] When the live wire and the neutral wire are connected normally, the second diode D2 and the second light emitting diode DL2 are both turned on. When the live wire and the neutral wire are connected abnormally, the second diode D2 and the second light emitting diode DL2 are both turned off.

[0071] like Figure 7 As shown, the third detection circuit may further include a third light emitting diode DL3, a third capacitor C3 and a ninth resistor R9. The anode of the third light emitting diode DL3 is connected to the cathode of the third diode D3 through the seventh resistor R7, and the cathode of the third light emitting diode DL3 is connected to the positive input terminal of the third photoelectric coupler U3. One end of the third capacitor C3 is connected to the second output terminal of the third photoelectric coupler U3, and the other end of the third capacitor C3 is connected to the ground terminal. The first output terminal of the third photoelectric coupler U3 is connected to the power supply through the ninth resistor R9.

[0072] When the neutral wire and the ground wire are connected normally, the third diode D3 and the third light-emitting diode DL3 are both off; when the live wire and the ground wire are connected abnormally, the third diode D3 and the third light-emitting diode DL3 are both on.

[0073] exist Figure 7 In the described embodiment, the main control system of the electrical appliance can send a control signal to the processing circuit through the communication circuit, and the processing circuit can send the control signal to the driving circuit after receiving the control signal. After receiving the control signal, the driving circuit can control the working state of the first control circuit, and then control the detection state of the first detection circuit and the second detection circuit, and can also control the working state of the second control circuit, and then control the detection state of the third detection circuit. The detection circuit can detect the wiring of the power socket, and when it is determined that the power socket has a fault, the processing circuit can send the fault information to the main control system through the communication circuit. The main control system can generate corresponding prompt information based on the fault information, so as to remind the user that the power socket has a wiring fault. When the main control system receives the fault information, it can control the electrical appliance to cut off the connection with the power socket to protect the electrical appliance from damage, while also ensuring the personal safety of the user.

[0074] See also Figure 8, Figure 8 This is a schematic diagram of another power socket wiring detection circuit disclosed in the embodiment of the present application. Figure 8 The power socket wiring detection circuit shown is composed of Figure 6 The power socket wiring detection circuit shown is optimized.

[0075] Figure 8 and Figure 7 The difference lies in that the connection modes of the third resistor R3 included in the first detection circuit, the sixth resistor R6 included in the second detection circuit and the ninth resistor R9 included in the third detection circuit are different.

[0076] like Figure 8 As shown, one end of the third resistor R3 is connected to the second output end of the first photocoupler U1, and the other end of the third resistor R3 is connected to the MCU. One end of the sixth resistor R6 is connected to the second output end of the first photocoupler U2, and the other end of the sixth resistor R6 is connected to the MCU. One end of the ninth resistor R9 is connected to the second output end of the first photocoupler U3, and the other end of the ninth resistor R9 is connected to the MCU.

[0077] See also Fig. 9 , Fig. 9 Schematic diagram of the structure of an electrical appliance disclosed in the embodiment of the present application. Fig. 9 As shown, the electrical appliance may include a plug 910 , a power socket connection detection circuit 920 , and a main control system 930 .

[0078] like Fig. 9 As shown, when the plug 910 of the electrical appliance is connected to the power socket, the main control system 930 can send a control signal to the power socket wiring detection circuit 920 to control the power socket detection circuit 920 to detect the wiring of the power socket.

[0079] The main control system 930 may send a control signal to the power socket wiring detection circuit 920 through the communication circuit 921. The main control system 930 may send a control signal to the power socket wiring detection circuit 920 at preset intervals, or may send a control signal to the power socket wiring detection circuit 920 when the plug 910 of the electrical appliance is reinserted into the power socket.

[0080] After receiving the control signal, the processing circuit 922 may send the control signal to the driving circuit 923 .

[0081] After the driving circuit 923 receives the control signal sent by the processing circuit 922, it can control the control circuit 924 according to the control signal. Controlling the control circuit 924 can be understood as controlling the state of the control circuit 924. The state of the control circuit 924 can be a working state and a non-working state. Controlling the control circuit 924 can be to control the control circuit 924 to start working so that the control circuit 924 is in a working state; or it can be to control the control circuit 924 to end working so that the control circuit 924 is in a non-working state.

[0082] The control circuit 924 can control the detection state of the detection circuit 925. The detection state of the detection circuit 925 can be understood as the working state of the detection circuit 925, or it can be the non-working state of the detection circuit 925. The detection state of the detection circuit 925 is determined according to the working state of the control circuit 924. When the state of the control circuit 924 is the working state, the detection state of the detection circuit 925 is the working state, that is, the state of detection; when the state of the control circuit 924 is the non-working state, the detection state of the detection circuit 925 is the non-working state, that is, the state of no detection. The detection state of the detection circuit 925 can be switched with the switching of the state of the control circuit 924. Exemplarily, when the control circuit 924 starts to work, the detection state of the detection circuit 925 is switched from the non-working state to the working state; when the control circuit 924 ends its work, the detection state of the detection circuit 925 is switched from the working state to the non-working state.

[0083] The detection circuit 925 can detect the connection signal of the power socket. Exemplarily, the detection circuit 925 can include a first detection circuit, a second detection circuit and a third detection circuit.

[0084] The first detection circuit 925 can detect the wiring signal of the live wire and the ground wire, the second detection circuit can detect the wiring signal of the live wire and the neutral wire, and the third detection circuit can detect the wiring signal of the neutral wire and the ground wire. The wiring signal of the live wire and the ground wire can be a signal flowing between the live wire and the ground wire. When the live wire and the ground wire are connected normally, the wiring signal of the live wire and the ground wire is a high-level signal (i.e., a signal that is not 0); when the live wire and the ground wire are connected abnormally, the wiring signal of the live wire and the ground wire is a low-level signal (i.e., a signal that is 0), that is, no current flowing between the live wire and the ground wire is detected. The wiring signal of the live wire and the neutral wire can be a signal flowing between the live wire and the neutral wire. When the live wire and the neutral wire are connected normally, the wiring signal of the live wire and the neutral wire is a high-level signal (i.e., a signal that is not 0); when the live wire and the neutral wire are connected abnormally, the wiring signal of the live wire and the neutral wire is a low-level signal (i.e., a signal that is 0), that is, no current flowing between the live wire and the neutral wire is detected. The wiring signal of the neutral wire and the ground wire can be a signal flowing between the neutral wire and the ground wire. When the connection between the neutral wire and the ground wire is normal, the connection signal between the neutral wire and the ground wire is a low-level signal (i.e., a signal of 0), that is, no current is detected flowing between the neutral wire and the ground wire; when the connection between the neutral wire and the ground wire is abnormal, the connection signal between the live wire and the neutral wire is a high-level signal (i.e., a signal that is not 0). After the detection is completed, the first detection circuit can output the connection signal between the live wire and the ground wire, the second detection circuit can output the connection signal between the live wire and the neutral wire, and the third detection circuit can output the connection signal between the neutral wire and the ground wire.

[0085] The processing circuit 922 can determine whether there is a wiring fault in the power socket based on the wiring signal of the live wire and the ground wire output by the first detection circuit, the wiring signal of the live wire and the neutral wire output by the second detection circuit, and the wiring signal of the neutral wire and the ground wire output by the third detection circuit.

[0086] When the wiring signal detected by the first detection circuit is a high-level signal, the wiring signal detected by the second detection circuit is a high-level signal, and the wiring signal detected by the third detection circuit is a low-level signal, the processing circuit 922 can determine that the live wire, the neutral wire, and the ground wire are correctly connected. When the wiring signal detected by the first detection circuit is a low-level signal, the wiring signal detected by the second detection circuit is a high-level signal, and the wiring signal detected by the third detection circuit is a low-level signal, the processing circuit 922 can determine that the ground wire is leaked. When the wiring signal detected by the first detection circuit is a low-level signal, the wiring signal detected by the second detection circuit is a high-level signal, and the wiring signal detected by the third detection circuit is a high-level signal, the processing circuit 922 can determine that the live wire and the neutral wire are connected incorrectly. When the wiring signal detected by the first detection circuit is a high-level signal, the wiring signal detected by the second detection circuit is a low-level signal, and the wiring signal detected by the third detection circuit is a low-level signal, the processing circuit 922 can determine that the neutral wire is leaked. When the wiring signal detected by the first detection circuit is a low level signal, the wiring signal detected by the second detection circuit is a low level signal, and the wiring signal detected by the third detection circuit is a low level signal, the processing circuit 922 can determine that the live wire is missing. When the wiring signal detected by the first detection circuit is a high level signal, the wiring signal detected by the second detection circuit is a low level signal, and the wiring signal detected by the third detection circuit is a high level signal, the processing circuit 922 can determine that the live wire and the ground wire are connected in the wrong position.

[0087] In the case where there is a wiring fault in the power socket, the processing circuit 922 can output fault information. The communication circuit 921 can receive the fault information and send the fault information to the main control system 930. The main control system 930 can receive the fault information, and can generate corresponding prompt information according to the fault information, and then can output the prompt information to prompt the user. The main control system 930 can output the prompt information through voice, display screen, etc. The prompt information can include specific fault information.

[0088] exist Fig. 9In the described embodiment, the main control system 930 of the electrical appliance can send a control signal to the processing circuit 922 through the communication circuit 921. After receiving the control signal, the processing circuit 922 can send a control signal to the driving circuit 923. After receiving the control signal, the driving circuit 923 can control the working state of the control circuit 924, and then control the detection state of the detection circuit 925. The detection circuit 925 can detect the wiring signal of the power socket. When it is determined that the power socket has a fault, the processing circuit 922 can send the fault information to the main control system 930 through the communication circuit 921. The main control system 930 can generate corresponding prompt information based on the fault information, thereby reminding the user that the power socket has a wiring fault. When receiving the fault information, the main control system 930 can also control the electrical appliance to cut off the connection with the power socket to protect the electrical appliance from damage, while also ensuring the personal safety of the user.

[0089] The detailed description of the working principle of the power socket detection circuit can refer to the above description.

[0090] The above are only preferred embodiments of the present application, and are not intended to limit the present application in any form. Although the present application has been disclosed as above with preferred embodiments, it is not intended to limit the present application. Any technical personnel in the field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present application. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. A power socket detection circuit, characterized in that: It includes detection circuit, processing circuit and communication circuit, wherein: The detection circuit is respectively connected to the power socket and the processing circuit, and the communication circuit is respectively connected to the processing circuit and the main control system of the electrical appliance; The detection circuit is used to detect the wiring signal of the power socket; The processing circuit is used to determine whether there is a wiring fault in the power socket according to the wiring signal, and if there is a wiring fault, send fault information to the main control system through the communication circuit.

2. The power socket detection circuit according to claim 1, characterized in that: The power socket detection circuit also includes a control circuit and a drive circuit, wherein: The driving circuit is respectively connected to the processing circuit and the control circuit, and the control circuit is respectively connected to the detection circuit and the power socket; The processing circuit is further used to send a control signal to the driving circuit; The driving circuit is used to control the control circuit according to the control signal; The control circuit is used to control the detection state of the detection circuit.

3. The power socket detection circuit according to claim 1, characterized in that: The detection circuit includes a first detection circuit, a second detection circuit and a third detection circuit, wherein: The first detection circuit is respectively connected to the live wire, the ground wire and the processing circuit, the second detection circuit is respectively connected to the live wire, the neutral wire and the processing circuit, and the third detection circuit is respectively connected to the neutral wire, the ground wire and the processing circuit; The first detection circuit is used to detect the connection signal between the live wire and the ground wire; The second detection circuit is used to detect the connection signal between the live wire and the neutral wire; The third detection circuit is used to detect the connection signal between the neutral line and the ground line.

4. The power socket detection circuit according to claim 3, characterized in that: The processing circuit determines whether the power socket has a wiring fault according to the wiring signal, including: When the wiring signal detected by the first detection circuit is a high level signal, the wiring signal detected by the second detection circuit is a high level signal, and the wiring signal detected by the third detection circuit is a low level signal, it is determined that the live wire, the neutral wire, and the ground wire are correctly connected; When the wiring signal detected by the first detection circuit is a low level signal, the wiring signal detected by the second detection circuit is a high level signal, and the wiring signal detected by the third detection circuit is a low level signal, determining a leaky ground wire; When the wiring signal detected by the first detection circuit is a low-level signal, the wiring signal detected by the second detection circuit is a high-level signal, and the wiring signal detected by the third detection circuit is a high-level signal, it is determined that the live wire and the neutral wire are connected incorrectly; When the wiring signal detected by the first detection circuit is a high level signal, the wiring signal detected by the second detection circuit is a low level signal, and the wiring signal detected by the third detection circuit is a low level signal, determining that the neutral line is missing; When the wiring signal detected by the first detection circuit is a low-level signal, the wiring signal detected by the second detection circuit is a low-level signal, and the wiring signal detected by the third detection circuit is a low-level signal, determining that the live wire is missing; When the wiring signal detected by the first detection circuit is a high-level signal, the wiring signal detected by the second detection circuit is a low-level signal, and the wiring signal detected by the third detection circuit is a high-level signal, it is determined that the live wire and the ground wire are connected incorrectly.

5. The power socket detection circuit according to claim 3 or 4, characterized in that: The first detection circuit includes a first diode, a first resistor, a first photocoupler, and a second resistor, wherein: The positive electrode of the first diode is connected to the live wire, the negative electrode of the first diode is connected to the positive input terminal of the first photoelectric coupler through the first resistor, the negative input terminal of the first photoelectric coupler is connected to the ground wire, the first output terminal of the first photoelectric coupler is connected to a power supply, the second output terminal of the first photoelectric coupler is respectively connected to one end of the second resistor and the processing circuit, and the other end of the second resistor is connected to the ground; The second detection circuit includes a second diode, a fourth resistor, a second photocoupler, and a fifth resistor, wherein: The anode of the second diode is connected to the live wire, the cathode of the second diode is connected to the anode input terminal of the second photoelectric coupler through the fourth resistor, the cathode input terminal of the second photoelectric coupler is connected to the neutral wire, the first output terminal of the second photoelectric coupler is connected to a power supply, the second output terminal of the second photoelectric coupler is respectively connected to one terminal of the fifth resistor and the processing circuit, and the other terminal of the fifth resistor is connected to the ground terminal; and The third detection circuit includes a third diode, a seventh resistor, a third photocoupler, and an eighth resistor, wherein: The positive electrode of the third diode is connected to the neutral line, the negative electrode of the third diode is connected to the positive input terminal of the third photoelectric coupler through the seventh resistor, the negative input terminal of the third photoelectric coupler is connected to the ground line, the first output terminal of the third photoelectric coupler is connected to the power supply, the second output terminal of the third photoelectric coupler is respectively connected to one end of the eighth resistor and the processing circuit, and the other end of the eighth resistor is connected to the ground.

6. The power socket detection circuit according to claim 5, characterized in that: The first detection circuit also includes a first light emitting diode, wherein: The anode of the first light emitting diode is connected to the cathode of the first diode through the first resistor, and the cathode of the first light emitting diode is connected to the positive input terminal of the first photocoupler; The second detection circuit also includes a second light emitting diode, wherein: The anode of the second light emitting diode is connected to the cathode of the second diode through the fourth resistor, and the cathode of the second light emitting diode is connected to the positive input terminal of the second photoelectric coupler; and The third detection circuit further includes a third light emitting diode, wherein: The anode of the third light emitting diode is connected to the cathode of the third diode through the seventh resistor, and the cathode of the third light emitting diode is connected to the positive input terminal of the third photoelectric coupler.

7. The power socket detection circuit according to claim 5, characterized in that: The first detection circuit further includes a first capacitor, wherein: One end of the first capacitor is connected to the second output end of the first photocoupler, and the other end of the first capacitor is connected to the ground; The second detection circuit further includes a second capacitor, wherein: One end of the second capacitor is connected to the second output end of the second photocoupler, and the other end of the second capacitor is connected to the ground; and The third detection circuit further includes a third capacitor, wherein: One end of the third capacitor is connected to the second output end of the third photoelectric coupler, and the other end of the third capacitor is connected to the ground.

8. The power socket detection circuit according to claim 5, characterized in that: The first detection circuit further includes a third resistor, wherein: The first output terminal of the first photoelectric coupler is connected to a power supply via the third resistor; or One end of the third resistor is connected to the second output end of the first photoelectric coupler, and the other end of the third resistor is connected to the processing circuit; The second detection circuit further includes a sixth resistor, wherein: The first output terminal of the second photoelectric coupler is connected to a power supply via the sixth resistor; or One end of the sixth resistor is connected to the second output end of the second photocoupler, and the other end of the sixth resistor is connected to the processing circuit; and The third detection circuit further includes a ninth resistor, wherein: The first output terminal of the third photoelectric coupler is connected to a power supply via the ninth resistor; or One end of the ninth resistor is connected to the second output end of the third photoelectric coupler, and the other end of the ninth resistor is connected to the processing circuit.

9. The power socket detection circuit according to claim 3, characterized in that: The control circuit comprises a first control circuit and a second control circuit, wherein: The first control circuit is respectively connected to the live wire, the drive circuit, the first detection circuit and the second detection circuit, and the second control circuit is respectively connected to the neutral wire, the drive circuit and the third detection circuit; The first control circuit is used to control the detection states of the first detection circuit and the second detection circuit; The second control circuit is used to control the detection state of the third detection circuit.

10. The power socket detection circuit according to claim 9, characterized in that: The first control circuit includes a first relay, and the second control circuit includes a second relay, wherein: The first end of the first relay is connected to the power supply, the second end of the first relay is connected to the drive circuit, the third end of the first relay is connected to the live wire, and the fourth end of the first relay is connected to the detection circuit; the first end of the second relay is connected to the power supply, the second end of the second relay is connected to the drive circuit, the third end of the second relay is connected to the neutral wire, and the fourth end of the second relay is connected to the detection circuit.

11. An electrical appliance, characterized in that: The invention comprises the power socket detection circuit according to any one of claims 1 to 10.

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