A zero-live communication device, electrical equipment and communication control method thereof

Abstract

The present invention discloses a zero-live communication device, an electrical device and a communication control method thereof, the device comprising: a zero-live communication circuit body, configured to realize the zero-live communication function of the electrical device to be communicated by using the zero-live communication method; a discharge unit, configured to discharge the energy formed by harmful parameters on the communication cable of the zero-live communication circuit body during the process of realizing the zero-live communication function of the zero-live communication circuit body, at least when the communication distance of the zero-live communication circuit body is greater than or equal to the set distance; the communication distance is the distance between different communication ends that can realize the zero-live communication function; the harmful parameters are parameters that are not conducive to the zero-live communication circuit body realizing the zero-live communication function. This scheme improves the communication reliability by discharging the energy formed by harmful parameters generated by the zero-live communication circuit due to the long communication distance when the communication distance between the two communication ends is lengthened.

Description

Technical Field

[0001] The present invention belongs to the field of communication technology, and specifically relates to a zero-live communication device, an electrical device and a communication control method thereof, and more particularly to a circuit for extending the zero-live communication distance, an electrical device having the circuit, and a communication control method for the electrical device. Background Art

[0002] In the communication circuit design of the relevant scheme, the neutral and live wires are widely used in various industries such as home appliances as a low-cost communication method. However, the communication circuit itself has certain defects. For example, the communication distance between the two ends is short. If the communication distance is extended, communication failures will occur, affecting the communication reliability.

[0003] The above contents are only used to assist in understanding the technical solution of the present invention and do not constitute an admission that the above contents are prior art. Summary of the invention

[0004] The purpose of the present invention is to provide a zero-live wire communication device, electrical equipment and communication control method thereof, so as to solve the problem that in a zero-live wire communication circuit, the communication distance between the two ends of the communication is short. If the communication distance is lengthened, communication failure will occur, affecting the communication reliability. The effect of improving the communication reliability is achieved by discharging the energy formed by harmful parameters generated by the long communication distance in the zero-live wire communication circuit when the communication distance between the two ends of the communication is lengthened.

[0005] The present invention provides a zero-live communication device, comprising: a zero-live communication circuit body and a discharge unit; wherein the zero-live communication circuit body is configured to realize the zero-live communication function of the electrical equipment to be communicated by using the zero-live communication method; the discharge unit is configured to discharge the energy formed by harmful parameters on the communication cable of the zero-live communication circuit body during the process of the zero-live communication circuit body realizing the zero-live communication function, at least when the communication distance of the zero-live communication circuit body is greater than or equal to the set distance; the communication distance is the distance between different communication ends that can realize the zero-live communication function; the harmful parameters are parameters that are not conducive to the zero-live communication circuit body realizing the zero-live communication function.

[0006] In some embodiments, different communication ends of the zero-live communication circuit body include: a first communication end and a second communication end; the first communication end includes: a first communication port and a second communication port; the second communication end includes: a third communication port and a fourth communication port; the discharge unit includes: a first discharge module and a second discharge module; the first discharge module is arranged between the first communication port and the second communication port; the second discharge module is arranged between the third communication port and the fourth communication port; the discharge unit discharges the energy formed by harmful parameters on the communication cable of the zero-live communication circuit body, including: the first discharge module is configured to discharge the energy formed by harmful parameters on the communication cable of the first communication end in the zero-live communication circuit body; the second discharge module is configured to discharge the energy formed by harmful parameters on the communication cable of the second communication end in the zero-live communication circuit body.

[0007] In some embodiments, the set distance includes: a first distance and a second distance, the second distance is greater than the first distance; the first discharge module includes: a first resistor module; the second discharge module includes: a second resistor module; wherein the first discharge module discharges the energy formed by harmful parameters on the communication cable at the first communication end in the zero-live communication circuit body, including: the first resistor module is configured to discharge the energy formed by harmful parameters on the communication cable at the first communication end in the zero-live communication circuit body; the second discharge module discharges the energy formed by harmful parameters on the communication cable at the second communication end in the zero-live communication circuit body, including: the second resistor module is configured to discharge the energy formed by harmful parameters on the communication cable at the second communication end in the zero-live communication circuit body.

[0008] In some embodiments, the first discharge module includes: a first switch tube module; the second discharge module includes: a second switch tube module; wherein the first discharge module discharges the energy formed by harmful parameters on the communication cable at the first communication end in the zero-live communication circuit body, including: the first switch tube module is configured to discharge the energy formed by harmful parameters on the communication cable at the first communication end in the zero-live communication circuit body at least when the communication distance of the zero-live communication circuit body is greater than or equal to the second distance; the second distance is greater than the first distance; the second discharge module discharges the energy formed by harmful parameters on the communication cable at the second communication end in the zero-live communication circuit body, including: the second switch tube module is configured to discharge the energy formed by harmful parameters on the communication cable at the first communication end in the zero-live communication circuit body at least when the communication distance of the zero-live communication circuit body is greater than or equal to the second distance.

[0009] In some embodiments, the zero-live communication device further includes: a control unit; the first communication end further includes: a first isolation module, a second isolation module; the second communication end further includes: a third isolation module, a fourth isolation module; wherein the control unit is configured to control at least one of the first switch tube module, the second switch tube module, the first isolation module, the second isolation module, the third isolation module and the fourth isolation module.

[0010] In some embodiments, the control unit controls at least one of the first switch tube module, the second switch tube module, the first isolation module, the second isolation module, the third isolation module and the fourth isolation module, including: before communication between the first communication end and the second communication end, controlling the first isolation module and the second isolation module to be turned off, and controlling the first switch tube module and the second switch tube module to be turned on, so as to discharge the energy formed by harmful parameters on the communication cables of the corresponding communication ends; after communication between the first communication end and the second communication end, if the communication time reaches a first set time, keeping the first isolation module and the second isolation module turned off, and keeping the first switch tube module and the second switch tube module turned on; if the opening time of the first switch tube module and the second switch tube reaches a second set time, controlling the first switch tube module and the second switch tube to be turned off; after the first switch tube module and the second switch tube are turned off, controlling the first communication end and the second communication end to communicate according to the set communication mode.

[0011] In some embodiments, the control unit controls at least one of the first switch tube module, the second switch tube module, the first isolation module, the second isolation module, the third isolation module and the fourth isolation module, including: before communication between the first communication end and the second communication end, controlling the first isolation module and the second isolation module to be turned off, and controlling the first switch tube module and the second switch tube module to be turned on, so as to discharge the energy formed by harmful parameters on the communication cables of the corresponding communication ends; when the first communication end sends a signal to the second communication end, or when the second communication end sends a signal to the first communication end, if the first isolation module is in a conducting state, controlling the first switch tube module and the second switch tube module to be turned off; when the first communication end sends a signal to the second communication end, if the first isolation module is in a turned-off state, controlling the first switch tube module and the second switch tube module to be turned on; wherein, if the first isolation module needs to be restored to a conducting state, the first switch tube module and the second switch tube module need to be controlled to be turned off in advance for a third set time length.

[0012] Matching the above-mentioned device, the present invention provides an electrical device on another aspect, including: the above-mentioned zero-live line communication device; the electrical device can communicate through the zero-live line communication device.

[0013] Matching the above-mentioned electrical equipment, the present invention provides a communication control method for electrical equipment on another aspect, comprising: in a zero-live wire communication device in the electrical equipment, at least when the communication distance of the zero-live wire communication circuit body is greater than or equal to the set distance, through a discharge unit arranged in the zero-live wire communication circuit body, in the process of the zero-live wire communication circuit body realizing the zero-live wire communication function, the energy formed by harmful parameters on the communication cable of the zero-live wire communication circuit body is discharged; the communication distance is the distance between different communication ends that can realize the zero-live wire communication function; the harmful parameters are parameters that are not conducive to the zero-live wire communication circuit body realizing the zero-live wire communication function.

[0014] In some embodiments, the discharge unit includes: a first discharge module and a second discharge module; the first discharge module includes: a first resistor module; the second discharge module includes: a second resistor module; the energy formed by harmful parameters on the communication cable of the zero-live communication circuit body is discharged through the discharge unit arranged in the zero-live communication circuit body, including: through the first resistor module, the energy formed by harmful parameters on the communication cable at the first communication end in the zero-live communication circuit body is discharged; through the second resistor module, the energy formed by harmful parameters on the communication cable at the second communication end in the zero-live communication circuit body is discharged.

[0015] In some embodiments, the discharge unit includes: a first discharge module and a second discharge module; the first discharge module includes: a first switch tube module; the second discharge module includes: a second switch tube module; the energy formed by harmful parameters on the communication cable of the zero-live communication circuit body is discharged through the discharge unit arranged in the zero-live communication circuit body, and it also includes: through the first switch tube module, at least when the communication distance of the zero-live communication circuit body is greater than or equal to the second distance, the energy formed by harmful parameters on the communication cable at the first communication end in the zero-live communication circuit body is discharged; the second distance is greater than the first distance; through the second switch tube module, at least when the communication distance of the zero-live communication circuit body is greater than or equal to the second distance, the energy formed by harmful parameters on the communication cable at the first communication end in the zero-live communication circuit body is discharged.

[0016] Therefore, the scheme of the present invention, by adding a discharge unit in the zero-live wire communication circuit, can discharge the energy formed by harmful parameters between the two communication ends in the zero-live wire communication circuit by using the discharge unit; thereby, by discharging the energy formed by harmful parameters generated in the zero-live wire communication circuit due to the long communication distance when the communication distance between the two communication ends is lengthened, the problem of communication failure when the communication distance is lengthened is reduced or even avoided, thereby improving the communication reliability when the communication distance is lengthened.

[0017] Other features and advantages of the present invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the present invention.

[0018] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the structure of an embodiment of a zero-live communication circuit;

[0020] Figure 2 A schematic diagram of cable parasitic parameters of an embodiment of a zero-live communication circuit;

[0021] Figure 3 A schematic diagram of an energy discharge loop of a first embodiment of a zero-live communication circuit;

[0022] Figure 4 A schematic diagram of an energy discharge loop of a second embodiment of a zero-live communication circuit;

[0023] Figure 5 A schematic diagram of an energy discharge loop of a third embodiment of a zero-live communication circuit;

[0024] Figure 6 It is a structural schematic diagram of an embodiment of a zero-live communication device of the present invention;

[0025] Figure 7 It is a structural schematic diagram of a first embodiment of a zero-live communication circuit of the present invention;

[0026] Figure 8 It is a structural schematic diagram of a second embodiment of the zero-live wire communication circuit of the present invention. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0028] In the zero-live communication mode, the communication distance between the two ends of communication (such as communication E end and communication F end) can only meet about 30 meters, and usually cannot reach more than 100 meters, or even farther communication distance. The circuit can no longer meet the communication requirements and communication failures will occur.

[0029] Figure 1 FIG. 1 is a schematic diagram of a structure of an embodiment of a zero-live communication circuit. Figure 1 As shown, it is a zero-live wire communication circuit topology, which is divided into a communication E end and a communication F end, representing the two ends of communication respectively.

[0030] exist Figure 1In the example shown, both the communication E end and the communication F end have a signal transmitting end and a signal receiving end. When the neutral-live communication circuit is communicating, when the communication E end sends data to the communication F end, the transmitting end of the communication F end needs to turn on the optocoupler U3 so that the optocoupler U4 at the communication F end can receive the data sent by the communication E end; similarly, when the communication F end needs to send data to the communication E end, the communication E end also needs to turn on the optocoupler U1 to obtain the received data at the communication optocoupler U2.

[0031] At the communication E end, there are provided a power supply POWER, an optocoupler U1, an optocoupler U2, a resistor R1, a resistor R2, a resistor R3, a diode D1, a communication port A and a communication port B. POWER represents the power supply of the communication circuit. The diode side of the optocoupler U1 serves as the transmitting end, the collector of the transistor side of the optocoupler U1 is connected to the positive electrode of the power supply POWER, and the negative electrode of the power supply POWER is connected to the communication port A. The transistor side of the optocoupler U2 serves as the receiving end. The emitter of the transistor side of the optocoupler U1 is connected to the anode of the diode side of the optocoupler U2. The cathode of the diode side of the optocoupler U2 is connected to the anode of the diode D1, and the cathode of the diode D1 is connected to the communication port B after passing through the resistor R3. The resistor R1 and the resistor R2 are connected in series between the collector of the transistor side of the optocoupler U1 and the cathode of the diode side of the optocoupler U2, and the common end of the resistor R1 and the resistor R2 is connected to the emitter of the transistor side of the optocoupler U1.

[0032] At the communication F end, there are provided an optocoupler U3, an optocoupler U4, a diode D2, a resistor R4, a resistor R5, a resistor R6, a communication port C and a communication port D. The transistor side of the optocoupler U4 is used as a receiving end, and the diode side of the optocoupler U3 is used as a transmitting end. The cathode of the diode side of the optocoupler U4 is connected to the communication port C, and is also connected to the collector of the transistor side of the optocoupler U3 through resistors R6 and R5. The cathode of the diode side of the optocoupler U4 is connected to the common end of the resistors R6 and R5, and is also connected to the emitter of the transistor side of the optocoupler U3. The collector of the transistor side of the optocoupler U3 is connected to the cathode of the diode D2 after the resistor R4, and the anode of the diode D2 is connected to the communication port D. A / B / C / D represents the four wiring ports of the communication port. In other words, the A / B / C / D ports represent the communication ports on both sides of the communication, A / B represents one end of the communication (such as the communication E end), and C / D represents the other end of the communication (such as the communication F end).

[0033] Figure 2 FIG. 1 is a schematic diagram of cable parasitic parameters of an embodiment of a zero-fireline communication circuit. Figure 2The figure shows the principle topology diagram of the parasitic parameters of the communication cable. In theoretical analysis, the communication cable is an ideal conductor with a parasitic parameter of 0. However, in actual application, due to the influence of the cable itself and the routing environment, parasitic parameters will be generated on the cable. Parasitic parameters are mainly composed of parasitic capacitance, parasitic resistance, and parasitic inductance. Generally speaking, parasitic resistance is small and is not the main parameter affecting communication. Parasitic inductance and capacitance are energy storage components. During the operation of the communication circuit, parasitic capacitance and inductance will be charged and stored. As the cable length increases, the parasitic parameters will gradually increase, and more energy will be stored.

[0034] exist Figure 2 In the figure, the object surface represents the surface of other objects that the cable contacts with other objects, and the earth represents the ground surface.

[0035] Figure 3 Schematic diagram of energy discharge loop of the first embodiment of zero-live communication circuit, Figure 4 Schematic diagram of energy discharge loop of the second embodiment of zero-live communication circuit, Figure 5 FIG. 1 is a schematic diagram of an energy discharge loop of a third embodiment of a zero-live communication circuit. Figure 3 , Figure 4 , Figure 5 As shown in Figure 2, when the communication cable is not long, the parasitic parameters are relatively small, and the energy accumulated on the parasitic parameters can be discharged through the circuit's own loop (see Figure 3 Discharge loop 1, Figure 4 Discharge loop 2 and discharge loop 3 in the Figure 5 The discharge loop 4 and the discharge loop 5 in the circuit are connected, so the communication will not be abnormal.

[0036] When the parasitic parameters increase to a certain extent, due to the large resistance on the loop, it takes a long time to discharge, and communication needs to be carried out in time during this period, which affects the communication signal. Therefore, the corresponding self-loop discharge circuit can no longer meet the speed requirements of energy discharge. If the energy cannot be discharged in time, the parasitic parameters will maintain a certain level, which will affect the communication level at the A / B / C / D port of the communication circuit. The final impact point is that the voltage on the diode side of the receiving optocoupler at the communication E end and the communication F end is abnormal. When the high and low levels cannot be basically consistent with the communication sending end, the diode cannot be opened in time and the tube section will appear, which will cause the output side of the optocoupler U2 and U4 to output abnormally, which will be manifested as abnormal communication between the communication E end and the communication F end, resulting in communication failure of electrical equipment.

[0037] exist Figures 2 to 5In the example shown, capacitors C1, C2, C3, C4, C5, C6, and C7 represent cable parasitic capacitance; resistors R9, R10, R11, and R12 represent cable parasitic resistance; and inductors L1 and L2 represent cable parasitic inductance.

[0038] According to an embodiment of the present invention, a zero-live communication device is provided. Figure 6 The structure diagram of an embodiment of the device of the present invention is shown in FIG. The zero-live line communication device may include: a zero-live line communication circuit body and a discharge unit. The zero-live line communication circuit body, such as Figures 1 to 5 The zero-live-wire communication circuit shown is arranged in the electrical equipment to be communicated. The discharge unit is arranged in the body of the zero-live-wire communication circuit.

[0039] Wherein, the zero-live-wire communication circuit body is configured to realize the zero-live-wire communication function of the electrical equipment to be communicated by utilizing the zero-live-wire communication method.

[0040] The discharge unit is configured to discharge the energy formed by harmful parameters on the communication cable of the zero-live communication circuit body during the process of the zero-live communication circuit body realizing the zero-live communication function, at least when the communication distance of the zero-live communication circuit body is greater than or equal to the set distance, so as to reduce the influence of the harmful parameters on the zero-live communication function. The communication distance is the distance between different communication ends that can realize the zero-live communication function. The harmful parameters, such as parasitic parameters (including parasitic inductance, parasitic resistance and parasitic capacitance) on the communication cable, are parameters that are not conducive to the zero-live communication circuit body realizing the zero-live communication function. Of course, when the communication distance of the zero-live communication distance body is less than the set distance, during the process of the zero-live communication circuit body realizing the zero-live communication function, the energy formed by harmful parameters on the communication cable of the zero-live communication circuit body can also be discharged to reduce the influence of the harmful parameters on the zero-live communication function.

[0041] In this way, for the communication circuit in the related scheme, after the communication distance is lengthened, the lengthening of the cables at both ends of the communication (such as the communication E end and the communication F end) will cause the parasitic resistance, parasitic inductance and parasitic capacitance parameters of the cables to increase, and the coupling parameters between the cables, between the cables and the earth, and between the cables and other contact objects to increase, resulting in communication failures when the communication distance is lengthened. The scheme of the present invention proposes an optimized design scheme, which adopts a method of adding a discharge resistor or a discharge circuit on the basis of the original zero-live wire communication circuit to solve the parasitic parameter problem caused by the long communication distance of the original zero-live wire communication circuit, thereby further solving the problem of short zero-live wire communication distance, so as to better extend the zero-live wire communication distance and better apply to more applications.

[0042] In some embodiments, the different communication terminals of the zero-live communication circuit body include: a first communication terminal (such as communication terminal E) and a second communication terminal (such as communication terminal F). The first communication terminal includes: a first communication port (such as port A of communication terminal E) and a second communication port (such as port A of communication terminal E). The second communication terminal includes: a third communication port (such as port C of communication terminal F) and a fourth communication port (such as port D of communication terminal F).

[0043] The discharge unit includes: a first discharge module and a second discharge module. The first discharge module is arranged between the first communication port and the second communication port. The second discharge module is arranged between the third communication port and the fourth communication port.

[0044] The discharge unit discharges the energy formed by harmful parameters on the communication cable of the zero-live communication circuit body, including:

[0045] The first discharge module is configured to discharge energy formed by harmful parameters on the communication cable at the first communication end in the neutral-live communication circuit body.

[0046] The second discharge module is configured to discharge energy formed by harmful parameters on the communication cable at the second communication end in the neutral-live communication circuit body.

[0047] Therefore, by optimizing the original zero-live wire communication circuit, the problem of excessive parasitic parameters of the communication cable after the zero-live wire communication circuit distance is extended is solved, which leads to the problem of parasitic parameter changes after the cable is lengthened and the problem of charge accumulation after the cable is coupled with other cables, thereby solving the problem of mismatch of material parameters of the original circuit, avoiding circuit protection, and solving the problem of too short distance of the zero-live wire communication circuit.

[0048] In some embodiments, the set distance includes: a first distance and a second distance, and the second distance is greater than the first distance. The first discharge module includes: a first resistor module (such as resistor R7). The second discharge module includes: a second resistor module (such as resistor R8).

[0049] Wherein, the first discharge module discharges the energy formed by harmful parameters on the communication cable at the first communication end in the zero-live communication circuit body, including: the first resistance module is configured to discharge the energy formed by harmful parameters on the communication cable at the first communication end in the zero-live communication circuit body. Of course, the first resistance module can also discharge the energy formed by harmful parameters on the communication cable at the first communication end in the zero-live communication circuit body when the communication distance of the zero-live communication circuit body is less than the first distance.

[0050] The second discharge module discharges the energy formed by harmful parameters on the communication cable at the second communication end in the zero-live communication circuit body, including: the second resistance module is configured to discharge the energy formed by harmful parameters on the communication cable at the second communication end in the zero-live communication circuit body. Of course, the second resistance module can also discharge the energy formed by harmful parameters on the communication cable at the second communication end in the zero-live communication circuit body when the communication distance of the zero-live communication circuit body is less than the first distance.

[0051] Figure 7 FIG. 1 is a schematic diagram of the structure of the first embodiment of the zero-live communication circuit of the present invention. Figure 7As shown, the zero-live communication circuit provided by the solution of the present invention adds a resistor R7 between the A and B terminals of the communication E end. A resistor R8 is added between the C and D terminals of the communication F end. The function of the resistor R7 and the resistor R8 is to discharge the energy stored in the parasitic parameters (including parasitic inductance and parasitic capacitance) on the communication cable in a timely manner. The resistance values ​​of the resistors R7 and R8 need to be selected according to the actual application circuit. The size is affected by the parameters of the circuit itself and the distance of the communication circuit. In theory, the smaller the resistance, the farther the communication distance. However, the resistance cannot be too small, otherwise it will cause abnormal voltage division in the main circuit. Therefore, the selection of the resistor needs to be comprehensively considered and set. For example: the selected values ​​of the resistors R7 and R8 are usually equal. When selecting the resistance value, in order to speed up the energy discharge, the sum of the resistors R7 and R8 is less than the sum of the resistors R3 and R4. In this way, after adding resistors R7 and R8, the energy on the parasitic parameters of the communication cable is directly discharged through resistors R7 and R8, which is beneficial to reducing the discharge loop and the discharge time. When the energy on the parasitic parameters can be discharged in real time, the terminal voltages at various locations on the zero-live communication circuit can be kept stable, so that the communication level at the receiving end returns to normal, thereby extending the zero-live communication distance.

[0052] It can be seen that the solution of the present invention can solve the problem of short zero-live line communication distance by adding a discharge resistor on the basis of the original zero-live line communication circuit.

[0053] In some embodiments, the first discharge module includes: a first switch tube module (such as transistor Q1). The second discharge module includes: a second switch tube module (such as transistor Q2).

[0054] Wherein, the first discharge module discharges the energy formed by harmful parameters on the communication cable at the first communication end in the zero-live communication circuit body, including: the first switch tube module is configured to discharge the energy formed by harmful parameters on the communication cable at the first communication end in the zero-live communication circuit body at least when the communication distance of the zero-live communication circuit body is greater than or equal to the second distance. Of course, the first switch tube module can also discharge the energy formed by harmful parameters on the communication cable at the first communication end in the zero-live communication circuit body when the communication distance of the zero-live communication circuit body is less than the second distance.

[0055] The second discharge module discharges the energy formed by harmful parameters on the communication cable at the second communication end in the zero-live communication circuit body, including: the second switch tube module is configured to discharge the energy formed by harmful parameters on the communication cable at the first communication end in the zero-live communication circuit body at least when the communication distance of the zero-live communication circuit body is greater than or equal to the second distance. Of course, the second switch tube module can also discharge the energy formed by harmful parameters on the communication cable at the second communication end in the zero-live communication circuit body when the communication distance of the zero-live communication circuit body is less than the second distance.

[0056] Figure 8 FIG. 2 is a schematic diagram of the structure of the second embodiment of the zero-live communication circuit of the present invention. Figure 8 As shown, in order to better extend the communication distance, Figure 7 Further improvement is made by replacing resistors R7 and R8 with transistors Q1 and Q2. After replacing resistors R7 and R8 with transistors Q1 and Q2, since the transistors are close to a short-circuit state when turned on, the energy on the parasitic parameters can be discharged more quickly, so that the level on the circuit will not be affected by the parasitic parameters of the cable length during each communication, and the communication distance will be longer.

[0057] It can be seen that the solution of the present invention can achieve the purpose of parasitic parameter energy discharge by adopting thyristors to replace discharge resistors and synchronously adding control logic, and further expand other solutions to the problem of the application scope of zero-live wire circuits. The solution using thyristors can better solve the parasitic parameter problem, and can further expand the zero-live wire communication distance, achieving the technical effect of extending the zero-live wire communication distance, so that zero-live wire communication can be applied to more application scenarios.

[0058] In some implementations, the zero-live communication device further includes: a control unit (such as a control chip).

[0059] The first communication end further includes: a first isolation module (such as an optical coupler U1 ) and a second isolation module (such as an optical coupler U2 ).

[0060] The second communication end further includes: a third isolation module (such as an optical coupler U3) and a fourth isolation module (such as an optical coupler U4).

[0061] Wherein, the control unit is respectively connected to the control end of the first switch tube module (such as the base of the transistor Q1), the control end of the second switch tube module (such as the base of the transistor Q2), the control end of the first isolation module (such as the base on the transistor side in the optocoupler U1), the control end of the second isolation module (such as the base on the transistor side in the optocoupler U2), the control end of the third isolation module (such as the base on the transistor side in the optocoupler U3), and the control end of the fourth isolation module (such as the base on the transistor side in the optocoupler U4), and is configured to control at least one of the first switch tube module, the second switch tube module, the first isolation module, the second isolation module, the third isolation module and the fourth isolation module.

[0062] exist Figure 8 In the example shown, since transistor Q1 and transistor Q2 are controllable devices and need to be signal controlled, there are two logics for turning on these two transistors, and the following conditions must be met. For details, please refer to the following exemplary description.

[0063] In some embodiments, the control unit controls at least one of the first switch tube module, the second switch tube module, the first isolation module, the second isolation module, the third isolation module, and the fourth isolation module, including:

[0064] Before communication is performed between the first communication end and the second communication end, the first isolation module and the second isolation module are controlled to be turned off, and the first switch tube module and the second switch tube module are controlled to be turned on to discharge energy generated by harmful parameters on the communication cables of the corresponding communication ends.

[0065] Furthermore, after the first communication terminal and the second communication terminal communicate, if the communication time reaches a first set time, the first isolation module and the second isolation module are kept turned off, and the first switch tube module and the second switch tube module are kept turned on. If the time when the first switch tube module and the second switch tube are turned on reaches a second set time, the first switch tube module and the second switch tube are controlled to be turned off.

[0066] Furthermore, after the first switch tube module and the second switch tube are turned off, the first communication end and the second communication end are controlled to communicate in a set communication mode.

[0067] Specifically, the first setting method:

[0068] Step 11: Before starting communication, keep the optocoupler U1 and the optocoupler U3 turned off, and turn on the transistor Q1 and the transistor Q2 to discharge energy.

[0069] Step 12: During the communication period, after a period of communication such as the first set time t1, the optocoupler U1 and the optocoupler U3 are kept off, and the transistors Q1 and Q2 are turned on. Here, the timing of turning on the transistors Q1 and Q2 needs to be after the optocoupler U1 and the optocoupler U3 are turned off.

[0070] The opening and closing in step 12 are different from those in step 11 in time periods, one is before communication and the other is during communication.

[0071] Step 13: After the transistor Q1 and the transistor Q2 are turned on for the second set time t2, they are turned off.

[0072] Step 14: After the transistor Q1 and the transistor Q2 are turned off, normal communication is performed. The length of the first set time t1 and the second set time t2 is adjusted according to the actual communication effect. In other words, the length of the first set time t1 and the second set time t2 needs to be sufficient to discharge the residual power in the circuit, and the specific value can be adjusted according to the actual application test.

[0073] In some embodiments, the control unit controls at least one of the first switch tube module, the second switch tube module, the first isolation module, the second isolation module, the third isolation module and the fourth isolation module, including: before communication between the first communication end and the second communication end, controlling the first isolation module and the second isolation module to turn off, and controlling the first switch tube module and the second switch tube module to turn on, so as to discharge the energy generated by harmful parameters on the communication cable of the corresponding communication end.

[0074] Furthermore, when the first communication terminal sends a signal to the second communication terminal, or when the second communication terminal sends a signal to the first communication terminal, if the first isolation module is in the on state, the first switch tube module and the second switch tube module are controlled to be turned off.

[0075] Furthermore, when the first communication terminal sends a signal to the second communication terminal, if the first isolation module is in the off state, the first switch tube module and the second switch tube module are controlled to be turned on. If the first isolation module needs to be restored to the on state, the first switch tube module and the second switch tube module need to be controlled to be turned off in advance for a third set time.

[0076] The second setting method:

[0077] Step 21: Before starting communication, keep the optocoupler U1 and the optocoupler U3 turned off, turn on the transistor Q1 and the transistor Q2 to discharge energy.

[0078] Step 22, when the communication E terminal sends a signal to the communication F terminal, when the optocoupler U1 is in the on state, the transistor Q1 and the transistor Q2 are turned off.

[0079] Step 23, when the communication terminal E sends a signal to the communication terminal F, when the optocoupler U1 is in the off state, the transistors Q1 and Q2 are turned on. The timing of turning on the transistors Q1 and Q2 needs to be after the optocoupler U1 is turned off.

[0080] Step 24, when the communication E terminal sends a signal to the communication F terminal, before the optocoupler U1 needs to be restored to the on state, the transistor Q1 and the transistor Q2 are turned off in advance for a third set time length t3.

[0081] Step 25, when the communication E terminal sends a signal to the communication F terminal, after the transistor Q1 and the transistor Q2 are turned off for the third set time t3, the optocoupler U1 is turned on. The length of the third set time t3 is designed according to the specific communication effect. The third set time t3 is generally shorter than the first set time t1 and the second set time t2. The third set time t3 needs to be determined according to the reverse recovery characteristics of the optocoupler, and the third set time t3 needs to be slightly longer than the reverse recovery time of the optocoupler U1.

[0082] Step 26: When the communication terminal F sends a signal to the communication terminal E, operations are performed according to steps 22, 23, 24 and 25 of the second setting method.

[0083] Among them, in the above implementation, the switch tube applicable devices: NPN transistor, PNP transistor, IGBT, MOSFET transistor and other switch tube devices. Optocoupler: can be expanded to any type of optocoupler device. Resistor: not limited to chip resistor, plug-in resistor, PTC resistor, NTC resistor type, all resistors can be included. Diode: not limited to copper-plated diode, fast recovery diode, Schottky diode and other forms, all diodes can be included.

[0084] The first setting method, that is, the first communication method, is: communicate first, and then discharge after a period of communication. The second setting method, that is, the second communication method, is: discharge while communicating, and the discharge time is in the low level state of the communication time.

[0085] Figure 7 and Figure 8 The example shown, with Figures 1 to 5 Compared with the example shown in the figure, the discharge circuit can be significantly reduced and the energy discharge speed can be accelerated. Figure 7 The resistor form is adopted, and Figure 8 It is a further improvement that uses thyristor components and requires logical control to complete energy discharge.

[0086] In this way, through the above improvements to the zero-live communication circuit, the communication distance of the zero-live communication circuit can be better extended, engineering application problems can be better solved, and more application environments can be better adapted. In other words, based on the original traditional zero-live solution, after further optimizing the circuit and making improvements, better communication effects and communication distances can be obtained, and it can be better applied to more places.

[0087] After a large number of tests and verifications, the technical solution of the present invention is adopted, by adding a discharge unit in the zero-live communication circuit, and by using the discharge unit, the energy formed by harmful parameters between the two ends of the communication in the zero-live communication circuit can be discharged. Therefore, when the communication distance between the two ends of the communication is extended, the energy formed by harmful parameters of the zero-live communication circuit due to the long communication distance is discharged, and the problem of communication failure when the communication distance is extended is reduced or even avoided, thereby improving the communication reliability when the communication distance is extended.

[0088] According to an embodiment of the present invention, an electrical device corresponding to the zero-live communication device is also provided. The electrical device may include: the zero-live communication device described above. The electrical device can communicate through the zero-live communication device. The electrical device may be an indoor unit and an outdoor unit of an air conditioner, or may refer to multiple indoor units of a multi-split air conditioner system.

[0089] Since the processing and functions implemented by the electrical equipment of this embodiment are basically corresponding to the aforementioned Figure 1 The embodiments, principles and examples of the device shown are as follows. Therefore, for matters not fully described in the description of this embodiment, reference can be made to the relevant descriptions in the aforementioned embodiments, and no further elaboration will be given here.

[0090] After a large number of experimental verifications, the technical solution of the present invention is adopted. By adding a discharge unit in the zero-live wire communication circuit, the discharge unit can be used to discharge the energy formed by harmful parameters between the two ends of the communication in the zero-live wire communication circuit, thereby solving the problem of harmful parameters such as parasitic parameters generated by the original zero-live wire communication circuit due to the long communication distance, thereby further solving the problem of short zero-live wire communication distance.

[0091] According to an embodiment of the present invention, a communication control method for an electrical device corresponding to the electrical device is also provided. The communication control method for the electrical device may include: in the zero-live communication device in the electrical device, at least when the communication distance of the zero-live communication circuit body is greater than or equal to the set distance, through the discharge unit arranged in the zero-live communication circuit body, in the process of the zero-live communication circuit body realizing the zero-live communication function, the energy formed by the harmful parameters on the communication cable of the zero-live communication circuit body is discharged to reduce the influence of the harmful parameters on the zero-live communication function. The communication distance is the distance between different communication ends that can realize the zero-live communication function. The harmful parameters, such as parasitic parameters (including parasitic inductance, parasitic resistance and parasitic capacitance) on the communication cable, are parameters that are not conducive to the zero-live communication circuit body realizing the zero-live communication function. Of course, when the communication distance of the zero-live wire communication distance body is less than the set distance, in the process of the zero-live wire communication circuit body realizing the zero-live wire communication function, the energy formed by the harmful parameters on the communication cable of the zero-live wire communication circuit body can also be discharged to reduce the influence of the harmful parameters on the zero-live wire communication function.

[0092] In this way, for the communication circuit in the related scheme, after the communication distance is lengthened, the lengthening of the cables at both ends of the communication (such as the communication E end and the communication F end) will cause the parasitic resistance, parasitic inductance and parasitic capacitance parameters of the cables to increase, and the coupling parameters between the cables, between the cables and the earth, and between the cables and other contact objects to increase, resulting in communication failures when the communication distance is lengthened. The scheme of the present invention proposes an optimized design scheme, which adopts a method of adding a discharge resistor or a discharge circuit on the basis of the original zero-live wire communication circuit to solve the parasitic parameter problem caused by the long communication distance of the original zero-live wire communication circuit, thereby further solving the problem of short zero-live wire communication distance, so as to better extend the zero-live wire communication distance and better apply to more applications.

[0093] In some embodiments, the discharge unit includes: a first discharge module and a second discharge module. The first discharge module includes: a first resistor module (such as resistor R7). The second discharge module includes: a second resistor module (such as resistor R8).

[0094] Among them, the energy formed by harmful parameters on the communication cable of the zero-live communication circuit body is discharged by the discharge unit arranged in the zero-live communication circuit body to reduce the influence of the harmful parameters on the zero-live communication function, including any of the following resistance discharge situations:

[0095] The first discharge situation: the energy formed by harmful parameters on the communication cable at the first communication end in the zero-live communication circuit body is discharged through the first resistance module. Of course, the first resistance module can also discharge the energy formed by harmful parameters on the communication cable at the first communication end in the zero-live communication circuit body when the communication distance of the zero-live communication circuit body is less than the first distance.

[0096] The second discharge situation: the energy formed by harmful parameters on the communication cable at the second communication end in the zero-live communication circuit body is discharged through the second resistance module. Of course, the second resistance module can also discharge the energy formed by harmful parameters on the communication cable at the second communication end in the zero-live communication circuit body when the communication distance of the zero-live communication circuit body is less than the first distance.

[0097] Therefore, by adding a discharge resistor on the basis of the original zero-live wire communication circuit, the problem of short zero-live wire communication distance is solved.

[0098] In some embodiments, the discharge unit includes: a first discharge module and a second discharge module. The first discharge module includes: a first switch tube module (such as transistor Q1). The second discharge module includes: a second switch tube module (such as transistor Q2).

[0099] The energy formed by harmful parameters on the communication cable of the zero-live communication circuit body is discharged by a discharge unit arranged in the zero-live communication circuit body to reduce the influence of the harmful parameters on the zero-live communication function, and also includes any of the following switch tube discharge situations:

[0100] The first switch tube discharge situation: through the first switch tube module, at least when the communication distance of the zero-live communication circuit body is greater than or equal to the second distance, the energy formed by the harmful parameters on the communication cable at the first communication end in the zero-live communication circuit body is discharged. Of course, the first switch tube module can also discharge the energy formed by the harmful parameters on the communication cable at the first communication end in the zero-live communication circuit body when the communication distance of the zero-live communication circuit body is less than the second distance. The second distance is greater than the first distance.

[0101] The second switch tube discharge situation: through the second switch tube module, at least when the communication distance of the zero-live communication circuit body is greater than or equal to the second distance, the energy formed by the harmful parameters on the communication cable at the first communication end in the zero-live communication circuit body is discharged. Of course, the second switch tube module can also discharge the energy formed by the harmful parameters on the communication cable at the second communication end in the zero-live communication circuit body when the communication distance of the zero-live communication circuit body is less than the second distance.

[0102] Therefore, by using thyristors to replace the discharge resistors and simultaneously adding control logic, the purpose of parasitic parameter energy discharge can be achieved, and other solutions to the problem of the application scope of the zero-live wire circuit can be further expanded. The use of thyristors can better solve the parasitic parameter problem, and can further expand the zero-live wire communication distance, achieving the technical effect of extending the zero-live wire communication distance, so that zero-live wire communication can be applied to more application scenarios.

[0103] Since the processing and functions implemented by the method of this embodiment basically correspond to the embodiments, principles and examples of the aforementioned electrical equipment, for the details not fully described in this embodiment, please refer to the relevant descriptions in the aforementioned embodiments, and no further elaboration will be made here.

[0104] After a large number of experimental verifications, the technical solution of this embodiment is adopted. By adding a discharge unit in the zero-live wire communication circuit, the discharge unit can be used to discharge the energy formed by harmful parameters between the two ends of the communication in the zero-live wire communication circuit, which can better extend the zero-live wire communication distance and be better suitable for more application scenarios.

[0105] In summary, it is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0106] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A zero-live communication device, It is characterized in that include: Zero-live communication circuit body and discharge unit; wherein, The zero-live-wire communication circuit body is configured to realize the zero-live-wire communication function of the electrical equipment to be communicated by using the zero-live-wire communication method; on the basis of the zero-live-wire communication circuit body, a discharge resistor or a discharge circuit is added as the discharge unit; The discharge unit is configured to discharge the energy formed by harmful parameters on the communication cable between the two communication ends in the zero-live communication circuit body during the process of the zero-live communication circuit body realizing the zero-live communication function, at least when the communication distance of the zero-live communication circuit body is greater than or equal to the set distance, so as to reduce the influence of the harmful parameters on the zero-live communication function; when the communication distance of the zero-live communication distance body is less than the set distance, during the process of the zero-live communication circuit body realizing the zero-live communication function, the energy formed by harmful parameters on the communication cable of the zero-live communication circuit body can also be discharged to reduce the influence of the harmful parameters on the zero-live communication function; the communication distance is the distance between different communication ends that can realize the zero-live communication function; the harmful parameters are parameters that are not conducive to the zero-live communication circuit body realizing the zero-live communication function.

2. The zero-live communication device according to claim 1, It is characterized in that The different communication ends of the zero-live communication circuit body include: a first communication end and a second communication end; the first communication end includes: a first communication port and a second communication port; the second communication end includes: a third communication port and a fourth communication port; The discharge unit includes: a first discharge module and a second discharge module; the first discharge module is arranged between the first communication port and the second communication port; the second discharge module is arranged between the third communication port and the fourth communication port; The discharge unit discharges the energy formed by harmful parameters on the communication cable of the zero-live communication circuit body, including: The first discharge module is configured to discharge the energy formed by harmful parameters on the communication cable of the first communication end in the zero-live communication circuit body; The second discharge module is configured to discharge energy formed by harmful parameters on the communication cable at the second communication end in the neutral-live communication circuit body.

3. The zero-live communication device according to claim 2, It is characterized in that The set distance includes: a first distance and a second distance, wherein the second distance is greater than the first distance; The first discharge module includes: a first resistor module; the second discharge module includes: a second resistor module; wherein, The first discharge module discharges the energy formed by harmful parameters on the communication cable of the first communication end in the zero-live communication circuit body, including: The first resistance module is configured to discharge the energy formed by harmful parameters on the communication cable of the first communication end in the zero-live communication circuit body; The second discharge module discharges the energy formed by harmful parameters on the communication cable of the second communication end in the zero-live communication circuit body, including: The second resistance module is configured to discharge energy formed by harmful parameters on the communication cable of the second communication end in the neutral-live communication circuit body.

4. The zero-live communication device according to claim 2, It is characterized in that The first discharge module includes: a first switch tube module; the second discharge module includes: a second switch tube module; wherein, The first discharge module discharges the energy formed by harmful parameters on the communication cable of the first communication end in the zero-live communication circuit body, including: The first switch tube module is configured to discharge the energy formed by harmful parameters on the communication cable at the first communication end in the zero-live communication circuit body at least when the communication distance of the zero-live communication circuit body is greater than or equal to a second distance; the second distance is greater than the first distance; The second discharge module discharges the energy formed by harmful parameters on the communication cable of the second communication end in the zero-live communication circuit body, including: The second switch tube module is configured to discharge energy formed by harmful parameters on the communication cable at the first communication end in the zero-live communication circuit body, at least when the communication distance of the zero-live communication circuit body is greater than or equal to a second distance.

5. The zero-live communication device according to claim 4, It is characterized in that The zero-live communication device further includes: a control unit; The first communication terminal further includes: a first isolation module and a second isolation module; The second communication terminal further includes: a third isolation module and a fourth isolation module; in, The control unit is configured to control at least one of the first switch tube module, the second switch tube module, the first isolation module, the second isolation module, the third isolation module and the fourth isolation module.

6. The zero-live communication device according to claim 5, It is characterized in that The control unit controls at least one of the first switch tube module, the second switch tube module, the first isolation module, the second isolation module, the third isolation module, and the fourth isolation module, including: Before communication is performed between the first communication end and the second communication end, the first isolation module and the second isolation module are controlled to be turned off, and the first switch tube module and the second switch tube module are controlled to be turned on, so as to discharge the energy formed by harmful parameters on the communication cables of the corresponding communication ends; After the first communication terminal and the second communication terminal communicate, if the communication time reaches a first set time, the first isolation module and the second isolation module are kept turned off, and the first switch tube module and the second switch tube module are kept turned on; if the time when the first switch tube module and the second switch tube are turned on reaches a second set time, the first switch tube module and the second switch tube are controlled to be turned off; After the first switch tube module and the second switch tube are turned off, the first communication end and the second communication end are controlled to communicate in a set communication mode.

7. The zero-live communication device according to claim 5, It is characterized in that The control unit controls at least one of the first switch tube module, the second switch tube module, the first isolation module, the second isolation module, the third isolation module, and the fourth isolation module, including: Before communication is performed between the first communication end and the second communication end, the first isolation module and the second isolation module are controlled to be turned off, and the first switch tube module and the second switch tube module are controlled to be turned on, so as to discharge the energy formed by harmful parameters on the communication cables of the corresponding communication ends; When the first communication terminal sends a signal to the second communication terminal, or when the second communication terminal sends a signal to the first communication terminal, if the first isolation module is in an on state, the first switch tube module and the second switch tube module are controlled to be turned off; When the first communication end sends a signal to the second communication end, if the first isolation module is in an off state, the first switch tube module and the second switch tube module are controlled to be turned on; wherein, if the first isolation module needs to be restored to an on state, the first switch tube module and the second switch tube module need to be controlled to be turned off in advance for a third set time period.

8. An electrical device, It is characterized in that include: A zero-live communication device as claimed in any one of claims 1 to 7; The electrical equipment can communicate via the zero-live wire communication device.

9. A communication control method for an electrical device as claimed in claim 8, It is characterized in that include: In the zero-live communication device in the electrical equipment, at least when the communication distance of the zero-live communication circuit body is greater than or equal to the set distance, through the discharge unit arranged in the zero-live communication circuit body, during the process of the zero-live communication circuit body realizing the zero-live communication function, the energy formed by the harmful parameters on the communication cable between the two communication ends in the zero-live communication circuit body is discharged to reduce the influence of the harmful parameters on the zero-live communication function; when the communication distance of the zero-live communication distance body is less than the set distance, during the process of the zero-live communication circuit body realizing the zero-live communication function, the energy formed by the harmful parameters on the communication cable of the zero-live communication circuit body can also be discharged to reduce the influence of the harmful parameters on the zero-live communication function; the communication distance is the distance between different communication ends that can realize the zero-live communication function; the harmful parameters are parameters that are not conducive to the zero-live communication circuit body realizing the zero-live communication function; on the basis of the zero-live communication circuit body, a discharge resistor or a discharge circuit is added as the discharge unit.

10. The communication control method of the electrical equipment according to claim 9, It is characterized in that The discharge unit includes: a first discharge module and a second discharge module; the first discharge module includes: a first resistor module; the second discharge module includes: a second resistor module; The energy formed by harmful parameters on the communication cable of the zero-live-wire communication circuit body is discharged by a discharge unit arranged in the zero-live-wire communication circuit body, including: The energy generated by harmful parameters on the communication cable at the first communication end in the zero-live communication circuit body is discharged through the first resistance module; The energy formed by harmful parameters on the communication cable at the second communication end in the zero-live communication circuit body is discharged through the second resistance module.

11. The communication control method of the electrical equipment according to claim 9, It is characterized in that The discharge unit includes: a first discharge module and a second discharge module; the first discharge module includes: a first switch tube module; the second discharge module includes: a second switch tube module; The energy formed by harmful parameters on the communication cable of the zero-live-wire communication circuit body is discharged by a discharge unit arranged in the zero-live-wire communication circuit body, and further includes: Through the first switch tube module, at least when the communication distance of the zero-live communication circuit body is greater than or equal to a second distance, the energy formed by harmful parameters on the communication cable at the first communication end in the zero-live communication circuit body is discharged; the second distance is greater than the first distance; Through the second switch tube module, at least when the communication distance of the zero-live communication circuit body is greater than or equal to the second distance, the energy formed by harmful parameters on the communication cable at the first communication end in the zero-live communication circuit body is discharged.

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