Two-wire non-polarity communication circuit and electric appliance

Abstract

The utility model relates to a two-wire non-polarity communication circuit and an electric appliance, which belong to the technical field of communication, and the communication circuit comprises a rectifier bridge, a diode, a first voltage-regulator tube, a second voltage-regulator tube, a first triode, a second triode, a first isolation optocoupler, a second isolation optocoupler and an electrolytic capacitor. The rectifier bridge is respectively connected with the diode, the first voltage-regulator tube, the second voltage-regulator tube, the first triode, the second triode, the electrolytic capacitor, the second isolation optocoupler and the ground wire; the diode is respectively connected with the first isolation optocoupler, the electrolytic capacitor, the second voltage-regulator tube and the second isolation optocoupler; the first isolation optocoupler is connected with the first triode; the first isolation optocoupler is connected with a VDD; the first isolation optocoupler is connected with a receiving end and a grounding wire; the second isolation optocoupler is connected with a VDD; the second isolation optocoupler is connected with a transmitting end; by means of the communication circuit, communication can be achieved in any wiring sequence, and the situation that communication cannot be achieved due to the wrong wiring sequence is effectively avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of communication, and in particular relates to a two-wire non-polarity communication circuit and an electrical appliance. Background Art

[0002] Traditional communication technologies generally have interface sequence requirements. For example, serial communication, I2C communication, etc. must be connected in the corresponding interface sequence. Once the connection is wrong, communication will be impossible. This is relatively simple for professionals, but for non-professionals, this is undoubtedly a very challenging problem. It is easy to make a wrong connection, resulting in a disordered wiring sequence and causing the product to be unable to communicate.

[0003] Non-polarity communication can achieve correct communication when the A and B wires are connected forward or reversely. Utility Model Content

[0004] To this end, the utility model provides a two-wire non-polarity communication circuit and an electrical appliance to solve the problem of product failure to communicate due to disordered wiring sequence in the existing communication technology.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] In a first aspect, the utility model provides a two-wire non-polarity communication circuit, the circuit comprising:

[0007] A rectifier bridge, a diode, a first voltage regulator tube, a second voltage regulator tube, a first transistor, a second transistor, a first isolation optocoupler, a second isolation optocoupler and an electrolytic capacitor;

[0008] The first pin of the rectifier bridge is respectively connected to the anode of the diode, the anode of the first voltage regulator tube, the cathode of the first voltage regulator tube, the anode of the second voltage regulator tube, the base of the first triode, the emitter of the first triode, the collector of the second triode, the emitter of the second triode, the base of the second triode, the cathode of the electrolytic capacitor, the third pin of the rectifier bridge, the fourth pin of the second isolation optocoupler and the ground wire;

[0009] The cathode of the diode is respectively connected to the first pin of the first isolation optocoupler, the anode of the electrolytic capacitor, the cathode of the second voltage regulator tube and the third pin of the second isolation optocoupler;

[0010] The second pin of the first isolation optocoupler is connected to the collector of the first transistor; the third pin of the first isolation optocoupler is connected to the VDD power supply; the fourth pin of the first isolation optocoupler is connected to the receiving end and the ground wire;

[0011] The first pin of the second isolation optocoupler is connected to a VDD power supply; the second pin of the second isolation optocoupler is connected to a transmitting end;

[0012] The second pin and the fourth pin of the rectifier bridge can be connected to a signal input line or a signal output line.

[0013] Furthermore, the circuit comprises:

[0014] A third resistor, wherein the third resistor is arranged between the base of the first transistor and the anode of the first voltage-stabilizing tube; the first end of the third resistor is connected to the base of the first transistor; the second end of the third resistor is respectively connected to the anode of the diode, the anode of the first voltage-stabilizing tube, the cathode of the first voltage-stabilizing tube, the emitter of the first transistor, the cathode of the electrolytic capacitor, the anode of the second voltage-stabilizing tube, the collector of the second transistor, the emitter of the second transistor, the base of the second transistor, the fourth pin of the second isolation optocoupler, the third pin of the rectifier bridge, the first pin of the rectifier bridge and the ground wire.

[0015] Furthermore, the circuit further comprises: a seventh resistor and an eighth resistor, wherein the seventh resistor is arranged between the base of the second triode and the fourth pin of the second isolation optocoupler; and the eighth resistor is arranged between the base of the second triode and the emitter of the second triode;

[0016] The first end of the seventh resistor is connected to the base of the second transistor; the second end of the seventh resistor is connected to the fourth pin of the second isolation optocoupler;

[0017] The first end of the eighth resistor is respectively connected to the base of the second triode and the first end of the seventh resistor; the second end of the eighth resistor is respectively connected to the collector of the second triode, the emitter of the second triode, the anode of the second voltage regulator, the cathode of the electrolytic capacitor, the emitter of the first triode, the second end of the third resistor, the anode of the first voltage regulator, the cathode of the first voltage regulator, the anode of the diode, the third pin of the rectifier bridge, the first pin of the rectifier bridge and the ground wire.

[0018] Further, the circuit further comprises: a first resistor and a first capacitor, wherein the first resistor and the first capacitor are connected in parallel and are arranged between the first pin of the rectifier bridge and the third pin of the rectifier bridge;

[0019] The first end of the first resistor is respectively connected to the first pin of the rectifier bridge, the first end of the first capacitor, the cathode of the first voltage regulator, the anode of the diode and the collector of the second transistor; the second end of the first resistor is respectively connected to the second end of the first capacitor, the third pin of the rectifier bridge, the anode of the first voltage regulator, the second end of the third resistor, the emitter of the first transistor, the cathode of the electrolytic capacitor, the anode of the second voltage regulator, the emitter of the second transistor, the second end of the eighth resistor and the ground wire.

[0020] Further, the circuit further comprises: a second resistor, the second resistor being arranged between the second end of the third resistor and the emitter of the first transistor;

[0021] The first end of the second resistor is respectively connected to the anode of the first voltage regulator and the second end of the third resistor; the second end of the second resistor is respectively connected to the third pin of the rectifier bridge, the second end of the first resistor, the second end of the first capacitor, the emitter of the first transistor, the cathode of the electrolytic capacitor, the anode of the second voltage regulator, the emitter of the second transistor, the eighth resistor and the ground wire.

[0022] Furthermore, the circuit also includes: a fourth resistor, which is arranged between the cathode of the diode and the first pin of the first isolation optocoupler; the first end of the fourth resistor is connected to the first pin of the first isolation optocoupler; the second end of the fourth resistor is respectively connected to the cathode of the diode, the anode of the electrolytic capacitor, the cathode of the second voltage regulator tube and the third pin of the second isolation optocoupler.

[0023] Furthermore, the circuit further comprises:

[0024] A fifth resistor and a sixth resistor; the fifth resistor is arranged between the fourth pin of the first isolation optocoupler and the ground wire; the sixth resistor is arranged between the fourth pin of the first isolation optocoupler and the receiving end; the first end of the fifth resistor is respectively connected to the fourth pin of the first isolation optocoupler and the first end of the sixth resistor; the second end of the fifth resistor is connected to the ground wire; the first end of the sixth resistor is respectively connected to the fourth pin of the first isolation optocoupler and the first end of the fifth resistor; the second end of the sixth resistor is connected to the receiving end.

[0025] Furthermore, the circuit further comprises:

[0026] A ninth resistor, wherein the ninth resistor is arranged between the first pin of the second isolation optocoupler and the VDD power supply; the first end of the ninth resistor is connected to the VDD power supply; and the second end of the ninth resistor is connected to the first pin of the second isolation optocoupler.

[0027] In a second aspect, the utility model provides an electrical appliance, comprising any of the above-mentioned two-wire non-polarity communication circuits.

[0028] The utility model adopts the above technical solution, which has at least the following beneficial effects:

[0029] The present application provides a two-wire non-polarity communication circuit and an electrical appliance. When there is a signal input, the isolated signal is transmitted to the signal receiving end controller through the voltage regulator tube, transistor and isolation photoelectric device at the signal input end; when there is a signal output, the signal sending end transmits the signal to the outside after isolation through the voltage regulator tube, transistor and isolation photoelectric device; through the two-wire communication circuit of the utility model, communication can be achieved in any wiring sequence, effectively avoiding the communication failure caused by the wrong wiring sequence.

[0030] It should be understood that the above general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 It is a circuit diagram of a two-wire non-polarity communication circuit shown in an exemplary embodiment of the utility model;

[0033] Figure 2 It is a circuit diagram of a two-wire non-polarity communication circuit A shown in another exemplary embodiment of the utility model;

[0034] Figure 3 It is a circuit diagram of a two-wire non-polarity communication circuit B shown in another exemplary embodiment of the utility model;

[0035] Figure 4 It is a circuit diagram of a two-wire non-polarity communication circuit C shown in another exemplary embodiment of the utility model;

[0036] Figure 5 is a circuit diagram of a two-wire non-polarity communication circuit D shown in another exemplary embodiment of the utility model;

[0037] Figure 6 is a circuit diagram of a two-wire non-polarity communication circuit E shown in another exemplary embodiment of the utility model;

[0038] Figure 7 is a circuit diagram of a two-wire non-polarity communication circuit F shown in another exemplary embodiment of the utility model;

[0039] Figure 8 It is a circuit diagram of a two-wire non-polarity communication circuit G shown in another exemplary embodiment of the utility model;

[0040] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.

[0042] In the existing technology, communication technology generally has interface sequence corresponding requirements, such as serial communication, I2C communication, etc., which must be connected in the corresponding interface sequence. Once the connection is wrong, communication cannot be achieved. This is relatively simple for professionals, but for non-professionals, this is undoubtedly a very challenging problem, and it is easy to make mistakes. In addition, due to human errors, there is also the possibility of disordered terminal line sequence, which will inevitably lead to the product being unable to communicate. The more complex the connection process required by the communication itself, the easier it is to make mistakes. Therefore, a communication method with simple connection and no need to consider the wiring sequence is very meaningful.

[0043] The utility model realizes the communication distance of 20 to 30 meters by loading the data signal on the ultra-low power line (DC12V) through the communication principle similar to the power carrier. The input front end of the communication technology is designed with a full-wave rectifier bridge, so the input signal does not need to consider the interface correspondence problem, and can be connected in any order. The signal input end is provided with a voltage regulator tube, a triode and an isolation photoelectric device, and the isolated signal is transmitted to the signal receiving end controller. The signal output end is also provided with a voltage regulator tube, a triode and an isolation photoelectric device. The isolated signal is transmitted to the external receiving end controller after isolation, thereby improving the anti-interference ability of the entire communication and realizing the isolation communication technology of arbitrary sequence connection and long distance.

[0044] The communication circuit of the present utility model is described below through specific embodiments.

[0045] See also Figure 1 , Figure 1 is a circuit diagram of a two-wire non-polarity communication circuit shown in an exemplary embodiment of the utility model, see Figure 1 , the communication circuit includes:

[0046] Rectifier bridge DB1, diode D1, first voltage regulator tube DZ1, second voltage regulator tube DZ2, first transistor TN1, second transistor TN2, first isolation optocoupler OPT1, second isolation optocoupler OPT2 and electrolytic capacitor E1; the first pin of the rectifier bridge DB1 is respectively connected to the anode of the diode D1, the anode of the first voltage regulator tube DZ1, the cathode of the first voltage regulator tube DZ1, the anode of the second voltage regulator tube DZ2, the base of the first transistor LN1, the emitter of the first transistor LN1, the collector of the second transistor TN2, the emitter of the second transistor TN2, the base of the second transistor TN2, the cathode of the electrolytic capacitor E1, the third pin of the rectifier bridge DB1, and the fourth pin of the second isolation optocoupler OPT2. The pin is connected to the ground wire; the cathode of the diode D1 is respectively connected to the first pin of the first isolation optocoupler OPT1, the anode of the electrolytic capacitor E1, the cathode of the second voltage regulator tube DZ2 and the third pin of the second isolation optocoupler OPT2; the second pin of the first isolation optocoupler OPT1 is connected to the collector of the first transistor TN1; the third pin of the first isolation optocoupler OPT1 is connected to the VDD power supply; the fourth pin of the first isolation optocoupler OPT1 is connected to the receiving end and the ground wire; the first pin of the second isolation optocoupler OPT2 is connected to the VDD power supply; the second pin of the second isolation optocoupler OPT2 is connected to the transmitting end; the second pin and the fourth pin of the rectifier bridge DB1 can both be connected to the signal input line or the signal output line.

[0047] It should be noted that the technical solution provided in this embodiment is often used in household electrical appliances in practice. Applicable scenarios include but are not limited to: range hoods, air conditioners, sweeping robots, televisions, microwave ovens, vacuum cleaners, washing machines, refrigerators, ovens, humidifiers, soybean milk machines, electric pressure cookers, induction cookers and other intelligent electrical appliances that require non-polarity interface communication.

[0048] It should be noted that when the signal is input: when the transmitting end TX stops working, the input signal passes through the rectifier bridge DB1, and because the voltage is greater than the voltage of the first voltage regulator DZ1, the first voltage regulator DZ1 will reversely break down, and the first transistor TN1 will work. The first isolation optocoupler OPT1 is controlled by the first transistor TN1, so after the first transistor TN1 works, the first isolation optocoupler OPT1 will also work synchronously, and the input signal will be input to the receiving end RX after isolation; when the signal is output: when the receiving end RX stops working, the output signal is isolated by the second isolation optocoupler OPT2 and then controls the second transistor TN2 to work. After the second transistor TN2 works, it will directly control the level change of the power bus, thereby generating a corresponding data signal, and transmitting it to the outside through the rectifier bridge DB1.

[0049] It can be understood that the communication circuit provided in this embodiment can enable communication in any wiring sequence, effectively avoiding communication failure caused by wiring sequence errors.

[0050] In one embodiment, see Figure 2 , Figure 2 is a circuit diagram of a two-wire non-polarity communication circuit A shown in another exemplary embodiment of the utility model, see Figure 2 The circuit also includes: a third resistor R3, which is arranged between the base of the first transistor TN1 and the anode of the first voltage-stabilizing tube DZ1; a first end of the third resistor R3 is connected to the base of the first transistor TN1; a second end of the third resistor R3 is respectively connected to the anode of the diode D1, the anode of the first voltage-stabilizing tube DZ1, the cathode of the first voltage-stabilizing tube DZ1, the emitter of the first transistor TN1, the cathode of the electrolytic capacitor E1, the anode of the second voltage-stabilizing tube DZ2, the collector of the second transistor TN2, the emitter of the second transistor TN2, the base of the second transistor TN2, the fourth pin of the second isolation optocoupler OPT2, the third pin of the rectifier bridge DB1, the first pin of the rectifier bridge DB1 and the ground wire.

[0051] In one embodiment, see Figure 3 , Figure 3 is a circuit diagram of a two-wire non-polarity communication circuit B shown in another exemplary embodiment of the utility model, see Figure 3 The circuit also includes: a seventh resistor R7 and an eighth resistor R8, the seventh resistor R7 is arranged between the base of the second triode TN2 and the fourth pin of the second isolation optocoupler OPT2; the eighth resistor R8 is arranged between the base of the second triode TN2 and the emitter of the second triode TN2; the first end of the seventh resistor R7 is connected to the base of the second triode TN2; the second end of the seventh resistor R7 is connected to the fourth pin of the second isolation optocoupler OPT2; the first end of the eighth resistor R8 is respectively connected to the base of the second triode TN2 and the first end of the seventh resistor R7; the second end of the eighth resistor R8 is respectively connected to the collector of the second triode TN2, the emitter of the second triode TN2, the anode of the second voltage regulator DZ2, the cathode of the electrolytic capacitor E1, the emitter of the first triode TN1, the second end of the third resistor R3, the anode of the first voltage regulator DZ1, the cathode of the first voltage regulator DZ1, the anode of the diode D1, the third pin of the rectifier bridge DB1, the first pin of the rectifier bridge DB1 and the ground wire.

[0052] In one embodiment, see Figure 4 , Figure 4 is a circuit diagram of a two-wire non-polarity communication circuit C shown in another exemplary embodiment of the utility model, see Figure 4The circuit also includes: a first resistor R1 and a first capacitor C1, the first resistor R1 and the first capacitor C1 are connected in parallel and arranged between the first pin of the rectifier bridge DB1 and the third pin of the rectifier bridge DB1; the first end of the first resistor R1 is respectively connected to the first pin of the rectifier bridge DB1, the first end of the first capacitor C1, the cathode of the first voltage regulator tube DZ1, the anode of the diode D1 and the collector of the second triode TN2; the second end of the first resistor R1 is respectively connected to the second end of the first capacitor C1, the third pin of the rectifier bridge DB1, the anode of the first voltage regulator tube DZ1, the second end of the third resistor R3, the emitter of the first triode TN1, the cathode of the electrolytic capacitor E1, the anode of the second voltage regulator tube DZ2, the emitter of the second triode TN2, the second end of the eighth resistor R8 and the ground wire.

[0053] In one embodiment, see Figure 5 , Figure 5 is a circuit diagram of a two-wire non-polarity communication circuit D shown in another exemplary embodiment of the utility model, see Figure 5 The circuit also includes: a second resistor R2, which is arranged between the second end of the third resistor R3 and the emitter of the first triode TN1; the first end of the second resistor R2 is respectively connected to the anode of the first voltage-stabilizing tube DZ1 and the second end of the third resistor R3; the second end of the second resistor R2 is respectively connected to the third pin of the rectifier bridge DB1, the second end of the first resistor R1, the second end of the first capacitor C1, the emitter of the first triode TN1, the cathode of the electrolytic capacitor E1, the anode of the second voltage-stabilizing tube DZ2, the emitter of the second triode TN2, the eighth resistor R8 and the ground wire.

[0054] In one embodiment, see Figure 6 , Figure 6 is a circuit diagram of a two-wire non-polarity communication circuit E shown in another exemplary embodiment of the present invention, see Figure 6 The circuit also includes: a fourth resistor R4, which is arranged between the cathode of the diode D1 and the first pin of the first isolation optocoupler OPT1; a first end of the fourth resistor R4 is connected to the first pin of the first isolation optocoupler OPT1; a second end of the fourth resistor R4 is respectively connected to the cathode of the diode D1, the anode of the electrolytic capacitor E1, the cathode of the second voltage regulator tube DZ2 and the third pin of the second isolation optocoupler OPT2.

[0055] In one embodiment, see Figure 7 , Figure 7 is a circuit diagram of a two-wire non-polarity communication circuit F shown in another exemplary embodiment of the present invention, see Figure 7The circuit also includes: a fifth resistor R5 and a sixth resistor R6; the fifth resistor R5 is arranged between the fourth pin of the first isolation optocoupler OPT1 and the ground line; the sixth resistor R6 is arranged between the fourth pin of the first isolation optocoupler OPT1 and the receiving end; the first end of the fifth resistor R5 is respectively connected to the fourth pin of the first isolation optocoupler OPT1 and the first end of the sixth resistor R6; the second end of the fifth resistor R5 is connected to the ground line; the first end of the sixth resistor R6 is respectively connected to the fourth pin of the first isolation optocoupler OPT1 and the first end of the fifth resistor R5; the second end of the sixth resistor R6 is connected to the receiving end.

[0056] In one embodiment, see Figure 8 , Figure 8 is a circuit diagram of a two-wire non-polarity communication circuit G shown in another exemplary embodiment of the utility model, see Figure 8 The circuit also includes: a ninth resistor R9, which is arranged between the first pin of the second isolation optocoupler OPT2 and the VDD power supply; a first end of the ninth resistor R9 is connected to the VDD power supply; and a second end of the ninth resistor R9 is connected to the first pin of the second isolation optocoupler OPT2.

[0057] It can be understood that the communication circuit provided in this embodiment, when there is a signal input, transmits the isolated signal to the signal receiving end controller through the voltage-stabilizing diode, transistor and isolation photoelectric device at the signal input end; when there is a signal output, the signal sending end transmits the signal to the outside after isolation through the voltage-stabilizing diode, transistor and isolation photoelectric device; through the two-wire communication circuit of the utility model, communication can be achieved in any wiring sequence, effectively avoiding the inability to communicate due to wire sequence errors, and at the same time, it has extremely strong communication anti-interference ability.

[0058] In one embodiment, an electrical appliance is provided, comprising any one of the above two-wire non-polarity communication circuits.

[0059] In the description of this specification, the description of reference terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. The above-mentioned embodiments only express several implementation methods of the present application, and the description thereof is relatively specific and detailed, but it cannot be understood as a limitation on the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present application, several variations and improvements can be made, which all belong to the scope of protection of the present application. Therefore, the scope of protection of the patent of this application shall be subject to the attached claims.

[0060] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0061] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0062] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

[0063] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A two-wire non-polarity communication circuit, characterized in that: The circuit comprises: A rectifier bridge, a diode, a first voltage regulator tube, a second voltage regulator tube, a first transistor, a second transistor, a first isolation optocoupler, a second isolation optocoupler and an electrolytic capacitor; The first pin of the rectifier bridge is respectively connected to the anode of the diode, the anode of the first voltage regulator tube, the cathode of the first voltage regulator tube, the anode of the second voltage regulator tube, the base of the first triode, the emitter of the first triode, the collector of the second triode, the emitter of the second triode, the base of the second triode, the cathode of the electrolytic capacitor, the third pin of the rectifier bridge, the fourth pin of the second isolation optocoupler and the ground wire; The cathode of the diode is respectively connected to the first pin of the first isolation optocoupler, the anode of the electrolytic capacitor, the cathode of the second voltage regulator tube and the third pin of the second isolation optocoupler; The second pin of the first isolation optocoupler is connected to the collector of the first transistor; the third pin of the first isolation optocoupler is connected to the VDD power supply; the fourth pin of the first isolation optocoupler is connected to the receiving end and the ground wire; The first pin of the second isolation optocoupler is connected to a VDD power supply; the second pin of the second isolation optocoupler is connected to a transmitting end; The second pin and the fourth pin of the rectifier bridge can be connected to a signal input line or a signal output line.

2. The communication circuit according to claim 1, characterized in that: The circuit further comprises: A third resistor, wherein the third resistor is arranged between the base of the first transistor and the anode of the first voltage-stabilizing tube; the first end of the third resistor is connected to the base of the first transistor; the second end of the third resistor is respectively connected to the anode of the diode, the anode of the first voltage-stabilizing tube, the cathode of the first voltage-stabilizing tube, the emitter of the first transistor, the cathode of the electrolytic capacitor, the anode of the second voltage-stabilizing tube, the collector of the second transistor, the emitter of the second transistor, the base of the second transistor, the fourth pin of the second isolation optocoupler, the third pin of the rectifier bridge, the first pin of the rectifier bridge and the ground wire.

3. The communication circuit according to claim 2, characterized in that: The circuit further comprises: a seventh resistor and an eighth resistor, wherein the seventh resistor is arranged between the base of the second triode and the fourth pin of the second isolation optical coupler; and the eighth resistor is arranged between the base of the second triode and the emitter of the second triode; The first end of the seventh resistor is connected to the base of the second transistor; the second end of the seventh resistor is connected to the fourth pin of the second isolation optocoupler; The first end of the eighth resistor is respectively connected to the base of the second triode and the first end of the seventh resistor; the second end of the eighth resistor is respectively connected to the collector of the second triode, the emitter of the second triode, the anode of the second voltage regulator, the cathode of the electrolytic capacitor, the emitter of the first triode, the second end of the third resistor, the anode of the first voltage regulator, the cathode of the first voltage regulator, the anode of the diode, the third pin of the rectifier bridge, the first pin of the rectifier bridge and the ground wire.

4. The communication circuit according to claim 3, characterized in that: The circuit further comprises: A first resistor and a first capacitor, wherein the first resistor and the first capacitor are connected in parallel and are arranged between the first pin of the rectifier bridge and the third pin of the rectifier bridge; The first end of the first resistor is respectively connected to the first pin of the rectifier bridge, the first end of the first capacitor, the cathode of the first voltage regulator, the anode of the diode and the collector of the second transistor; the second end of the first resistor is respectively connected to the second end of the first capacitor, the third pin of the rectifier bridge, the anode of the first voltage regulator, the second end of the third resistor, the emitter of the first transistor, the cathode of the electrolytic capacitor, the anode of the second voltage regulator, the emitter of the second transistor, the second end of the eighth resistor and the ground wire.

5. The communication circuit according to claim 4, characterized in that: The circuit further comprises: a second resistor, wherein the second resistor is arranged between the second end of the third resistor and the emitter of the first transistor; The first end of the second resistor is respectively connected to the anode of the first voltage regulator and the second end of the third resistor; the second end of the second resistor is respectively connected to the third pin of the rectifier bridge, the second end of the first resistor, the second end of the first capacitor, the emitter of the first transistor, the cathode of the electrolytic capacitor, the anode of the second voltage regulator, the emitter of the second transistor, the eighth resistor and the ground wire.

6. The communication circuit according to claim 5, characterized in that: The circuit further comprises: A fourth resistor, wherein the fourth resistor is arranged between the cathode of the diode and the first pin of the first isolation optocoupler; the first end of the fourth resistor is connected to the first pin of the first isolation optocoupler; the second end of the fourth resistor is respectively connected to the cathode of the diode, the anode of the electrolytic capacitor, the cathode of the second voltage regulator tube and the third pin of the second isolation optocoupler.

7. The communication circuit according to claim 6, characterized in that: The circuit further comprises: A fifth resistor and a sixth resistor; the fifth resistor is arranged between the fourth pin of the first isolation optocoupler and the ground wire; the sixth resistor is arranged between the fourth pin of the first isolation optocoupler and the receiving end; the first end of the fifth resistor is respectively connected to the fourth pin of the first isolation optocoupler and the first end of the sixth resistor; the second end of the fifth resistor is connected to the ground wire; the first end of the sixth resistor is respectively connected to the fourth pin of the first isolation optocoupler and the first end of the fifth resistor; the second end of the sixth resistor is connected to the receiving end.

8. The communication circuit according to claim 7, characterized in that: The circuit further comprises: A ninth resistor, wherein the ninth resistor is arranged between the first pin of the second isolation optocoupler and the VDD power supply; the first end of the ninth resistor is connected to the VDD power supply; and the second end of the ninth resistor is connected to the first pin of the second isolation optocoupler.

9. An electrical appliance, characterized in that: include: A two-wire non-polarity communication circuit as claimed in any one of claims 1 to 8.

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