An indoor and outdoor unit one-way communication air conditioner and communication control method

Abstract

The application discloses a kind of indoor and outdoor unit one-way communication air conditioner and communication control method, the air conditioner includes indoor unit and outdoor unit, and indoor unit is connected with outdoor unit by power line to provide alternating current power supply.Indoor unit is equipped with machine controller and chopper communication module, chopper communication module is connected to machine controller and power line, for the control instruction of machine controller is modulated as high-frequency communication signal and is superimposed on power line;Outdoor unit is equipped with outdoor unit controller and signal extraction module, signal extraction module is connected to the output end of outdoor unit controller and power line, for extracting high-frequency communication signal from power line, and the control instruction is demodulated by outdoor unit controller and is executed.The application modulates high-frequency communication signal on power line by chopper communication module, realizes the one-way communication of indoor unit to outdoor unit, does not need to set up dedicated communication line additionally, simplifies indoor and outdoor unit electrical connection, and reduces wire cost.

Description

Technical Field

[0001] This invention relates to the field of communication technology between indoor and outdoor air conditioning units, and particularly to a one-way communication air conditioner between indoor and outdoor units and a communication control method. Background Technology

[0002] Currently, residential split-type air conditioners generally use a live-neutral wire communication method between the indoor and outdoor units. This means that the electrical connection and communication current loop is formed by the live wire, neutral wire, ground wire, and a dedicated communication line (four wires in total). This communication line is used to realize two-way information exchange between the indoor and outdoor units. For example, the indoor unit transmits user commands such as mode settings and temperature settings to the outdoor unit, while the outdoor unit feeds back the operating status of the compressor, such as the current operating frequency, module temperature, and fault alarms, to the indoor unit, thereby realizing closed-loop control and safety protection of the air conditioning system.

[0003] However, in certain specific engineering applications, such as some commercial air conditioners or air conditioning systems that only require simple action control, such complex two-way information exchange between the indoor and outdoor units is not necessary. In these one-way control applications, the indoor unit only needs to transmit operating modes and on / off commands to the outdoor unit. The outdoor unit passively receives commands as a pure execution unit and does not need to provide any feedback on operating status or parameters to the indoor unit. In this case, the dedicated communication cable is actually idle for a long time and does not fulfill its actual two-way communication function.

[0004] However, since the traditional live-neutral communication circuit is designed based on the current loop principle, its communication function must rely on a dedicated communication line to form a loop. Therefore, this communication line cannot be eliminated in simplex scenarios. This not only leads to the maintenance of a four-wire connection between the indoor and outdoor units, increasing the number of physical wiring connections and wiring complexity, but also causes unnecessary waste of wiring costs in unidirectional control application scenarios. Summary of the Invention

[0005] The embodiments of the present invention provide a one-way communication air conditioner for indoor and outdoor units and a communication control method, which aims to solve the technical problems of complex wiring and high cost caused by the additional communication lines in the existing one-way communication between indoor and outdoor units of air conditioners.

[0006] In a first aspect, embodiments of the present invention provide a one-way communication air conditioner between indoor and outdoor units, comprising: an indoor unit and an outdoor unit, wherein the indoor unit is connected to the outdoor unit via a power cord to provide AC power to the outdoor unit; the indoor unit is provided with an indoor unit controller and a chopper communication module, the chopper communication module being connected to the indoor unit controller and the power cord, for modulating the control commands of the indoor unit controller into high-frequency communication signals and superimposing them onto the power cord; the outdoor unit is provided with an outdoor unit controller and a signal extraction module, the signal extraction module being connected to the output end of the outdoor unit controller and the power cord, for extracting the high-frequency communication signals from the power cord and transmitting them to the outdoor unit controller, wherein the outdoor unit controller demodulates the control commands and executes them.

[0007] In the indoor and outdoor unit one-way communication air conditioner provided in the embodiment of the present invention, the power cord includes a live wire and a neutral wire, the chopper communication module is connected to the input terminal of the live wire and / or the neutral wire, and the high-frequency communication signal is superimposed on the live wire and / or the neutral wire.

[0008] In the one-way communication air conditioner between indoor and outdoor units provided in this embodiment of the invention, the indoor unit is provided with a power monitoring module and a first voltage acquisition module. The first voltage acquisition module is connected to the power line and is used to detect the voltage of the AC power supply. The power monitoring module is connected to the first voltage acquisition module and the indoor unit controller and is used to calculate the voltage period, voltage amplitude, and voltage phase of the AC power supply and feed them back to the indoor unit controller.

[0009] In the unidirectional communication air conditioner between indoor and outdoor units provided in this embodiment of the invention, the outdoor unit is provided with a signal processing module and a second voltage acquisition module. The second voltage acquisition module is connected to the output end of the power line and is used to separate the high-frequency communication signal from the power line. The signal processing module is connected to the second voltage acquisition module and the outdoor unit controller and is used to amplify and filter the high-frequency communication signal before outputting it to the outdoor unit controller.

[0010] In the indoor-outdoor unit unidirectional communication air conditioner provided in this embodiment of the invention, the indoor unit is provided with a first power module. The input terminal of the first power module is used to connect to AC power. The output terminal of the first power module is connected to at least the indoor unit controller. The input terminal of the power cord is connected in parallel with the input terminal of the first power module to transmit AC power to the outdoor unit.

[0011] In the indoor and outdoor unit one-way communication air conditioner provided in the embodiment of the present invention, the first power module includes a first rectifier circuit and a first switching power supply. The input terminal of the first rectifier circuit is used to connect to an AC power supply, the output terminal of the first rectifier circuit is connected to the input terminal of the first switching power supply, and the output terminal of the first switching power supply is at least connected to the indoor unit controller.

[0012] In the unidirectional communication air conditioner between indoor and outdoor units provided in this embodiment of the invention, the outdoor unit is provided with a second power module. The input terminal of the second power module is connected to the output terminal of the power cord to obtain AC power, and the output terminal of the second power module is at least connected to the outdoor unit controller.

[0013] In the indoor and outdoor unit unidirectional communication air conditioner provided in this embodiment of the invention, the second power module includes a second rectifier circuit and a second switching power supply. The input terminal of the second rectifier circuit is connected to the output terminal of the power line, the output terminal of the second rectifier circuit is connected to the input terminal of the second switching power supply, and the output terminal of the second switching power supply is at least connected to the outdoor unit controller.

[0014] Secondly, the present invention provides a communication control method for an air conditioner, characterized in that it is applied to the unidirectional communication air conditioner between the indoor and outdoor units described in the first aspect. The method includes: acquiring the original voltage transmitted on the power line and calculating the voltage information of the original voltage, the voltage information including voltage amplitude, voltage phase, and voltage period; driving the chopper communication module to modulate the original voltage into a target communication voltage based on a target control command and the voltage information; extracting the target communication voltage on the power line through a signal extraction module and demodulating the target communication voltage to obtain the target control command; and controlling the outdoor unit to operate according to the target control command.

[0015] This invention utilizes the power line between the indoor and outdoor units as a communication carrier. The indoor unit modulates the control commands generated by the indoor unit controller into a high-frequency communication signal via a chopper communication module and superimposes it onto the power line. The outdoor unit extracts this high-frequency communication signal from the power line via a signal extraction module, which is then demodulated and restored by the outdoor unit controller to drive the outdoor unit to perform the corresponding action. Compared to existing technologies, this invention eliminates the need for a dedicated communication line, effectively simplifying the electrical connection structure between the indoor and outdoor units. While ensuring communication reliability, it significantly reduces cable costs, making it particularly suitable for air conditioning applications where only unidirectional control of the outdoor unit by the indoor unit is required. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 A schematic structural block diagram of an indoor / outdoor unit unidirectional communication air conditioner provided in an embodiment of the present invention; Figure 2 Another schematic structural block diagram of an indoor / outdoor unit unidirectional communication air conditioner provided in an embodiment of the present invention; Figure 3 The waveform of the original voltage on the power line; Figure 4 This is a waveform diagram of the target communication voltage on this power line; Figure 5 Another waveform diagram of the target communication voltage on the power line; Figure 6 A timing diagram for the target communication voltage on the power line; Figure 7 Another timing diagram for the target communication voltage on the power line; Figure 8 A flowchart illustrating the steps of the method provided in this embodiment of the invention; Figure 9 A flowchart of the sub-steps of the method provided in the embodiments of the present invention.

[0018] Explanation of reference numerals in the attached figures: 10. Indoor unit; 11. Indoor unit controller; 12. Chopper communication module; 13. Power monitoring module; 14. First voltage acquisition module; 15. First power module; 151. First rectifier circuit; 152. First switching power supply; 20. Outdoor unit; 21. Outdoor unit controller; 22. Signal extraction module; 221. Signal processing module; 222. Second voltage acquisition module; 23. Second power module; 231. Second rectifier circuit; 232. Second switching power supply; 30. Power cord. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0020] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0021] This invention provides a one-way communication air conditioner between indoor and outdoor units, comprising: an indoor unit 10 and an outdoor unit 20. The indoor unit 10 is connected to the outdoor unit 20 via a power cord 30 to provide AC power to the outdoor unit 20. The indoor unit 10 is equipped with an indoor unit controller 11 and a chopper communication module 12. The chopper communication module 12 is connected to the indoor unit controller 11 and the power cord 30, and is used to modulate the control commands of the indoor unit controller 11 into high-frequency communication signals and superimpose them onto the power cord 30. The outdoor unit 20 is equipped with an outdoor unit controller 21 and a signal extraction module 22. The signal extraction module 22 is connected to the output terminals of the outdoor unit controller 21 and the power cord 30, and is used to extract the high-frequency communication signals from the power cord 30 and transmit them to the outdoor unit controller 21. The outdoor unit controller 21 demodulates the control commands and executes them.

[0022] In practice, the air conditioner mainly comprises an indoor unit 10 and an outdoor unit 20. The indoor unit 10 and outdoor unit 20 are electrically connected via a power cable 30. This power cable 30 serves the dual function of supplying power to the outdoor unit 20 and transmitting communication signals. The indoor unit 10 includes an indoor unit controller 11 and a chopper communication module 12. The indoor unit controller 11, as the core control unit of the indoor unit 10, is responsible for generating corresponding control commands based on the user-set operating mode, temperature setting, and other input signals. The chopper communication module 12 is connected and coupled to the power cable 30, acting as an intermediate link between the indoor unit controller 11 and the power cable 30 for coupling control commands to the power cable 30.

[0023] The outdoor unit 20 includes an outdoor unit controller 21 and a signal extraction module 22. The outdoor unit controller 21, as the core control unit of the outdoor unit 20, is responsible for driving the compressor, fan, and other actuators. The signal extraction module 22 is connected between the output end of the power line 30 and the outdoor unit controller 21, and is used to receive modulated signals from the power line 30 and transmit them to the outdoor unit controller 21.

[0024] In actual operation, the indoor unit controller 11 first generates a control command and sends it to the chopper communication module 12. Upon receiving the control command, the chopper communication module 12 converts it into a digital coded signal and then converts it into a high-frequency communication signal through chopper modulation. Specifically, based on the data content of the control command, the chopper communication module 12 locally modulates the voltage waveform on the power line 30 at a specific phase position by rapidly switching it on and off, thereby superimposing the digitized control command onto the voltage waveform of the power line 30 in the form of high-frequency pulses. The frequency of this high-frequency communication signal is much higher than the AC power frequency (usually 50Hz or 60Hz), therefore it will not affect the normal power supply function of the AC power to the outdoor unit 20. The voltage waveform of the power line 30 after chopper modulation contains both the AC power used to drive the outdoor unit 20 normally and the high-frequency communication signal carrying the control command information. This composite signal is transmitted from the indoor unit 10 to the outdoor unit 20 along the power line 30.

[0025] On the outdoor unit 20 side, the signal extraction module 22 is connected to the output end of the power line 30 to receive the composite signal modulated by the indoor unit 10. The signal extraction module 22 has an internal filtering circuit and a signal separation circuit, which can separate the high-frequency communication signal on the power line 30 from the industrial frequency AC voltage and transmit the separated high-frequency communication signal to the outdoor unit controller 21. After receiving the high-frequency communication signal, the outdoor unit controller 21 demodulates it to restore the control command initially generated by the indoor unit controller 11. After demodulation, the outdoor unit controller 21 drives the actuators inside the outdoor unit 20 (such as the compressor, fan, electronic expansion valve, or four-way valve) to perform corresponding actions according to the restored control command, thereby achieving precise control of the air conditioner's operating status.

[0026] With the above structure, the indoor-outdoor unit unidirectional communication air conditioner of this embodiment does not require an additional dedicated communication line between the indoor unit 10 and the outdoor unit 20. It can complete the unidirectional transmission of control commands from the indoor unit 10 to the outdoor unit 20 using only the original power line 30, thereby simplifying the electrical connection structure between the indoor and outdoor units, effectively reducing cable costs, and improving system reliability.

[0027] In one embodiment, the indoor unit 10 is provided with a power monitoring module 13 and a first voltage acquisition module 14. The first voltage acquisition module 14 is connected to the power cord 30 and is used to detect the voltage of the AC power supply. The power monitoring module 13 is connected to the first voltage acquisition module 14 and the indoor unit controller 11 and is used to calculate the voltage period, voltage amplitude, and voltage phase of the AC power supply and feed them back to the indoor unit controller 11.

[0028] In practice, to achieve precise chopper communication, the indoor unit 10 is equipped with a voltage monitoring unit consisting of a power monitoring module 13 and a first voltage acquisition module 14. The first voltage acquisition module 14 is directly connected to the input end of the power line 30 and is used to sample the AC voltage signal transmitted on the power line 30 in real time, and transmit the sampled analog voltage signal to the power monitoring module 13.

[0029] The power monitoring module 13 is electrically connected to both the first voltage acquisition module 14 and the indoor unit controller 11. During actual operation, the power monitoring module 13 receives the analog voltage signal sent by the first voltage acquisition module 14, performs analog-to-digital conversion and signal processing, and extracts the key electrical parameters of the AC power supply. These parameters include at least: voltage amplitude, used to characterize the intensity of the current AC voltage; voltage period, used to determine the frequency and timing of the AC power; and voltage phase, used to determine the specific instantaneous angle of the AC voltage within one period. After calculation, these parameters are fed back to the indoor unit controller 11 in real time by the power monitoring module 13.

[0030] The voltage phase information is a core parameter in the chopper communication synchronization mechanism. After receiving the voltage period and voltage phase information provided by the power monitoring module 13, the indoor unit controller 11 can accurately determine the specific position of the current AC voltage waveform (e.g., peak, trough, or zero-crossing point). Based on this synchronization information, the indoor unit controller 11 can generate a precise chopper drive timing sequence, controlling the chopper communication module 12 to perform chopper modulation on the power line 30 at a preset phase point (e.g., near the peak of the voltage waveform). By performing chopping at a specific voltage phase, it can be ensured that the high-frequency communication signal is superimposed on the optimal position of the AC power waveform, thereby effectively reducing the interference of the communication signal on the power frequency power supply, and improving the success rate of the signal extraction module 22 in separating and restoring the high-frequency communication signal on the outdoor unit 20 side, ensuring the reliability and stability of the chopper communication.

[0031] In one embodiment, the outdoor unit 20 is provided with a signal processing module 221 and a second voltage acquisition module 222. The second voltage acquisition module 222 is connected to the output end of the power line 30 and is used to separate the high-frequency communication signal from the power line 30. The signal processing module 221 is connected to the second voltage acquisition module 222 and the outdoor unit controller 21 and is used to amplify and filter the high-frequency communication signal before outputting it to the outdoor unit controller 21.

[0032] In specific implementation, the outdoor unit 20 is equipped with a signal processing module 221 and a second voltage acquisition module 222 for receiving and processing high-frequency communication signals. The second voltage acquisition module 222 is directly connected to the output terminal of the power line 30 (i.e., the live wire and / or neutral wire entering the outdoor unit 20) and is used to sample the composite signal after it has been chopped and modulated by the indoor unit 10 in real time. Since the power line 30 transmits both industrial frequency AC power and high-frequency communication signals simultaneously, the main function of the second voltage acquisition module 222 is to effectively separate these two at the electrical level, extract the high-frequency communication signal component superimposed on the voltage waveform of the power line 30, and convert it into a signal form that can be processed by subsequent circuits.

[0033] The high-frequency communication signal separated by the second voltage acquisition module 222 is usually still a weak and noisy analog signal, which is difficult to directly meet the signal processing requirements of the outdoor controller 21. Therefore, the output of the second voltage acquisition module 222 is connected to the signal processing module 221. The signal processing module 221 may include a preamplifier, a bandpass filter, and a subsequent gain circuit in its circuit structure. The preamplifier is used to initially amplify the weak high-frequency communication signal so that its signal strength reaches a processable range; the bandpass filter is used to filter out residual power frequency AC and electromagnetic interference from other frequency bands, retaining only the effective signal components of the frequency band corresponding to the chopper communication; the subsequent gain circuit dynamically adjusts the gain according to the actual signal strength, so that the signal amplitude and waveform finally output to the outdoor controller 21 are stable and clear.

[0034] The high-frequency communication signal, amplified and filtered by the signal processing module 221, is sent to the outdoor unit controller 21. Since most noise and power frequency interference have been removed from the signal, the outdoor unit controller 21 can demodulate the high-frequency communication signal more accurately and reliably to reconstruct the original control commands sent by the indoor unit 10. Through the cooperation of the second voltage acquisition module 222 and the signal processing module 221, the outdoor unit 20 can stably extract and demodulate the high-frequency communication signal in a complex electromagnetic environment, effectively ensuring the reliability and anti-interference capability of the live-neutral wire chopper communication in practical air conditioning applications.

[0035] In one embodiment, the indoor unit 10 is provided with a first power module 15, the input terminal of the first power module 15 is used to connect to an AC power source, the output terminal of the first power module 15 is connected to at least the indoor unit controller 11, and the input terminal of the power cord 30 is connected in parallel with the input terminal of the first power module 15 to transmit AC power to the outdoor unit 20.

[0036] In specific implementation, the indoor unit 10 is equipped with a first power module 15, which serves as the basic power supply unit for the indoor unit 10. Its input terminal is directly connected to the external AC power supply trunk line. The output terminal of the first power module 15 is electrically connected at least to the indoor unit controller 11, and also to other loads of the indoor unit 10, such as the indoor fan and electronic expansion valve. The first power module 15 is used to rectify, filter, and step down the input AC power, converting it into a low-voltage DC power supply required for the operation of the indoor unit controller 11 and other loads of the indoor unit 10, thereby ensuring the normal operation of the indoor unit 10 system.

[0037] In terms of electrical connection structure, the input terminal of the power cord 30 and the input terminal of the first power module 15 are connected in parallel to the same external AC power source. Specifically, the external AC power supply line splits into two paths after entering the indoor unit 10: one path connects to the input terminal of the first power module 15 to provide operating power to the indoor unit controller 11; the other path is directly led to the outdoor unit 20 as the power cord 30 to supply AC operating power to the outdoor unit 20. This parallel structure allows the power cord 30 to not only carry AC power to supply power to the outdoor unit 20, but also serve as the physical transmission carrier for chop communication signals.

[0038] In actual operation, external AC power is supplied to both indoor unit 10 and outdoor unit 20 simultaneously through this parallel structure. The chopper communication module 12 is connected to the input terminal of the power line 30, i.e., to the AC power supply line to outdoor unit 20. This line is physically connected in parallel with the branch supplying power to the first power module 15, and does not affect the stable power supply of the first power module 15 itself. The indoor unit controller 11 obtains a stable DC power supply through the first power module 15, enabling it to process user commands and control the chopper communication module 12 for modulation operations. The high-frequency communication signal, after chopper modulation, is superimposed on the power line 30 and transmitted to outdoor unit 20 along with the AC power, completing the unidirectional transmission of control commands from indoor unit 10 to outdoor unit 20. This parallel power supply structure ensures that the control circuit of indoor unit 10 and the power supply circuit of outdoor unit 20 are electrically independent, achieving both multiplexing communication via the power line 30 and guaranteeing the stability of the power supply to the indoor unit controller 11 and the reliability of the system operation.

[0039] Furthermore, the first power module 15 includes a first rectifier circuit 151 and a first switching power supply 152. The input terminal of the first rectifier circuit 151 is used to connect to an AC power source, the output terminal of the first rectifier circuit 151 is connected to the input terminal of the first switching power supply 152, and the output terminal of the first switching power supply 152 is at least connected to the indoor unit controller 11.

[0040] In specific implementation, the first power module 15 of the indoor unit 10 is physically composed of a first rectifier circuit 151 and a first switching power supply 152 connected in series. The input terminal of the first rectifier circuit 151 is directly connected to an external AC power supply. Internally, it can employ a bridge rectifier circuit or a full-wave rectifier circuit to convert the input AC power into pulsating DC power, which is then preliminarily smoothed by a filter capacitor to obtain high-voltage DC power. The output terminal of the first rectifier circuit 151 is connected to the input terminal of the first switching power supply 152. The first switching power supply 152 typically employs a flyback converter or a buck converter topology to further convert the input high-voltage DC power into low-voltage DC power (e.g., 5V, 12V, or 24V) required for the operation of the indoor unit controller 11 and other loads. It also has a voltage stabilization function, effectively suppressing the impact of input voltage fluctuations on the output voltage. The output terminal of the first switching power supply 152 is at least electrically connected to the power input terminal of the indoor unit controller 11, providing a continuous and stable DC power supply for the normal operation of the indoor unit controller 11.

[0041] In actual operation, since the chopper communication module 12 is located at the input end of the power line 30, i.e., on the line before the AC power enters the first rectifier circuit 151, the chopper communication module 12 will superimpose a high-frequency chopper signal onto the AC voltage waveform when it performs high-frequency modulation on the power line 30. However, due to the inherent filtering and isolation characteristics of the series link between the first rectifier circuit 151 and the first switching power supply 152, the high-frequency chopper signal will be effectively filtered out after rectification by the first rectifier circuit 151 and conversion by the first switching power supply 152, and will not enter the power supply terminal of the indoor unit controller 11. Therefore, the power supply of the indoor unit controller 11 is not affected by the working state of the chopper communication module 12 and remains stable. Through this series power supply structure, this embodiment effectively ensures the power supply safety and operational stability of the indoor unit 10 main control system while utilizing the power line 30 to carry the chopper communication signal.

[0042] In one embodiment, the outdoor unit 20 is provided with a second power module 23, the input terminal of the second power module 23 is connected to the output terminal of the power cord 30 to obtain AC power, and the output terminal of the second power module 23 is at least connected to the outdoor unit controller 21.

[0043] In practice, the outdoor unit 20 is equipped with a second power module 23, which serves as the power supply hub for the entire outdoor unit 20. The input terminal of the second power module 23 is directly connected to the output terminal of the power line 30 (i.e., the composite AC power line 30 after being chopped and modulated by the indoor unit 10) to obtain AC power from the power line 30. The output terminal of the second power module 23 is electrically connected to each load module inside the outdoor unit 20 that requires power, providing a stable operating power supply for each load of the outdoor unit 20 and meeting the overall power supply requirements of the outdoor unit 20.

[0044] In terms of electrical connection, the input terminal of the second power module 23 is connected in parallel with the output terminal of the power line 30. Since the power line 30 simultaneously carries both AC power and high-frequency communication signals, the second power module 23, during the AC-to-DC conversion process, possesses internal filtering and isolation functions. This effectively separates the high-frequency communication signals from the AC power supply, ensuring that the high-frequency communication signals do not interfere with the normal operation of the outdoor unit controller 21 through the power supply circuit of the second power module 23. Simultaneously, since the signal extraction module 22 is also connected to the output terminal of the power line 30, the second power module 23 and the signal extraction module 22 form a parallel connection at the output terminal of the power line 30, operating independently without interference. Through this structure, the second power module 23 ensures power supply to the entire outdoor unit 20 while also providing a safe and stable operating power supply to the outdoor unit controller 21, allowing the outdoor unit controller 21 to focus on demodulating the high-frequency communication signals and processing execution instructions.

[0045] Furthermore, the second power module 23 includes a second rectifier circuit 231 and a second switching power supply 232. The input terminal of the second rectifier circuit 231 is connected to the output terminal of the power line 30, the output terminal of the second rectifier circuit 231 is connected to the input terminal of the second switching power supply 232, and the output terminal of the second switching power supply 232 is at least connected to the outdoor unit controller 21.

[0046] In specific implementation, the second power module 23 of the outdoor unit 20 consists of two stages connected in series: a second rectifier circuit 231 and a second switching power supply 232. The input terminal of the second rectifier circuit 231 is directly connected to the output terminal of the power line 30 to receive the composite AC power signal transmitted from the indoor unit 10. The second rectifier circuit 231 internally adopts a bridge rectifier or full-wave rectifier topology to convert the input power frequency AC power into pulsating DC power, and performs preliminary smoothing through a filter capacitor to obtain a high-voltage DC output. The output terminal of the second rectifier circuit 231 is connected to the input terminal of the second switching power supply 232. The second switching power supply 232 adopts a flyback converter, buck converter, or forward converter topology to further convert the input high-voltage DC power into multiple low-voltage DC power supplies of different voltage levels to meet the operating voltage requirements of different components inside the outdoor unit 20. The output terminal of the second switching power supply 232 is electrically connected to at least the power input terminal of the outdoor unit controller 21 to provide a stable and reliable DC power supply for the normal operation of the outdoor unit controller 21.

[0047] In actual operation, since the second rectifier circuit 231 is directly connected to the output terminal of the power supply line 30, its input side simultaneously carries both power frequency AC and high-frequency communication signals. However, the series link between the second rectifier circuit 231 and the second switching power supply 232 has inherent filtering and isolation characteristics. The high-frequency communication signals are effectively filtered out after being rectified by the second rectifier circuit 231 and converted by the second switching power supply 232, and will not enter the power supply terminal of the outdoor unit controller 21. Therefore, the power supply of the outdoor unit controller 21 is not affected by the high-frequency communication signals and remains stable. At the same time, since the output terminal of the second switching power supply 232 is connected to at least the outdoor unit controller 21, in actual implementation, the output terminal of the second switching power supply 232 can also output corresponding drive power according to the power supply requirements of the outdoor unit 20 load (such as the compressor drive module, fan drive module, four-way valve, and electronic expansion valve, etc.) to ensure the normal operation of the entire outdoor unit 20. Through the cooperation of the second rectifier circuit 231 and the second switching power supply 232, the second power module 23 obtains AC power from the power line 30, while also ensuring that the outdoor unit controller 21 and other actuators can obtain a stable and isolated DC power supply, thus providing hardware guarantee for the reliable operation of the entire unidirectional communication air conditioner.

[0048] In summary, the one-way communication air conditioner between the indoor and outdoor units provided in this embodiment of the invention utilizes the power line between the indoor and outdoor units as a communication carrier. The indoor unit controller drives the chopper communication module to modulate the control command into a high-frequency signal and superimpose it onto the power line based on the power voltage information. The outdoor unit extracts and demodulates the signal to drive the actuator. There is no need to set up a dedicated communication line. While ensuring communication reliability, it simplifies the electrical connection structure between the indoor and outdoor units and significantly reduces cable costs.

[0049] Please see Figure 8 The present invention also provides a communication control method for an air conditioner, which is applied to the aforementioned air conditioner with one-way communication between the indoor and outdoor units. For example... Figure 8 As shown, the method specifically includes the following steps S110 to S140.

[0050] S110. Obtain the original voltage transmitted on the power line and calculate the voltage information of the original voltage, wherein the voltage information includes voltage amplitude, voltage phase and voltage period.

[0051] In practice, the indoor unit's controller first acquires the raw voltage signal transmitted from the power line. In actual hardware implementation, this step involves the first voltage acquisition module in the indoor unit sampling the AC voltage waveform on the power line (i.e., the live wire and / or neutral wire) in real time, and transmitting the sampled analog voltage signal to the power monitoring module. The power monitoring module performs analog-to-digital conversion and signal processing on the received analog voltage signal, extracting key electrical parameters of the AC power supply. These parameters include, but are not limited to, voltage amplitude (characterizing the strength of the current AC voltage), voltage period (used to determine the frequency and timing of the AC power), and voltage phase (used to determine the specific instantaneous angle of the AC voltage within one period). After calculation, this voltage information is fed back to the indoor unit controller by the power monitoring module, providing a precise synchronization reference for subsequent chopper modulation.

[0052] S120. Based on the target control command and the voltage information, drive the chopper communication module to modulate the original voltage into the target communication voltage.

[0053] In practice, the indoor unit controller generates target control commands based on user-defined operating modes or temperature settings. Simultaneously, after receiving voltage information from the power monitoring module, the indoor unit controller accurately determines the specific position (e.g., peak, trough, or zero-crossing point) of the current AC voltage waveform based on the voltage phase and period. The indoor unit controller then generates corresponding chopper drive commands based on the target control commands and the aforementioned voltage information and sends them to the chopper communication module. The chopper communication module, based on the received chopper drive commands, locally modulates the voltage waveform on the power line at a specific phase position (e.g., near the peak of the voltage waveform) through rapid switching, thereby superimposing the digitized target control commands as high-frequency pulses onto the voltage waveform on the power line to form the target communication voltage. The frequency of this high-frequency communication signal is much higher than the AC power supply frequency, therefore it will not affect the normal power supply function of the AC power supply to the outdoor unit.

[0054] S130. Extract the target communication voltage on the power line through the signal extraction module, and demodulate the target communication voltage to obtain the target control command.

[0055] In practice, the target communication voltage (a composite signal containing both power frequency AC and high-frequency communication signals), after being chopper-modulated, is transmitted to the outdoor unit along the power line. The outdoor unit's signal extraction module is connected to the output of the power line via its internal second voltage acquisition module, sampling the composite signal on the power line in real time and separating the high-frequency communication signal from the power frequency AC voltage. The separated high-frequency communication signal is amplified and filtered by the signal processing module before being sent to the outdoor unit controller. Upon receiving the processed high-frequency communication signal, the outdoor unit controller demodulates it to reconstruct the target control command initially generated by the indoor unit controller.

[0056] Further, see Figure 9 The step S130, which drives the chopper communication module to modulate the original voltage into the target communication voltage based on the target control command and the voltage information, specifically includes the following steps S131 to S134.

[0057] S131. Determine the voltage period based on the voltage information.

[0058] In practice, the indoor unit controller extracts and confirms the voltage cycle of the current AC power supply based on the voltage information fed back by the power monitoring module. This voltage cycle corresponds to a complete waveform cycle of the AC power supply (e.g., 20ms at 50Hz power frequency). Determining the voltage cycle is the basis for timing synchronization in chopper communication. The indoor unit controller uses this cycle value to divide a complete communication frame window, providing a time reference for the accurate superposition of subsequent control commands.

[0059] S132. Determine the instruction type and instruction control parameters of the target control instruction.

[0060] In practice, after generating the target control command, the indoor unit controller further breaks it down into two parts: command type and command control parameters. The command type identifies the load of the outdoor unit to be executed, such as controlling the compressor, controlling the fan, controlling the electronic expansion valve, or controlling the four-way valve. The command control parameters identify the specific operating values ​​corresponding to the load, such as the compressor's operating frequency, the fan speed, the number of opening steps of the electronic expansion valve, or the on / off state of the four-way valve. By splitting the target control command into command type and command control parameters, the subsequent chopper modulation can encode and transmit the two types of information separately according to actual needs, which helps to reduce the data burden of a single chopper transmission while ensuring command diversity.

[0061] S133. Determine the first target chopping position according to the instruction type, and determine the second target chopping position according to the instruction control parameters; the first target chopping position and the second target chopping position are both located within the same voltage cycle of the original voltage.

[0062] In practice, the indoor unit controller selects corresponding chopping positions within the same voltage cycle determined in step S131, based on the instruction type and instruction control parameters determined in step S132. Specifically, the indoor unit controller determines a first target chopping position based on the instruction type, which carries the digital encoding information of the instruction type; simultaneously, it determines a second target chopping position based on the instruction control parameters, which carries the digital encoding information of the instruction control parameters. Both the first and second target chopping positions are located within the same voltage cycle, ensuring that each complete voltage cycle can transmit a complete set of instruction types and their corresponding instruction control parameters. In practical applications, the first target chopping position can be selected within the first half of the voltage cycle, and the second target chopping position can be selected within the second half of the voltage cycle, to form a clear frame structure division in timing, facilitating signal extraction and demodulation at the outdoor unit.

[0063] S134. Generate a target chopping drive command based on the first target chopping position and the second target chopping position. The target chopping drive command is used to cause the chopping communication module to perform chopping modulation on the original voltage at the first target chopping position and the second target chopping position to form the target communication voltage.

[0064] In practice, after selecting the first and second target chopping positions, the indoor unit controller combines these two positions to generate a target chopping drive command, which is then sent to the chopping communication module. Upon receiving the target chopping drive command, the chopping communication module drives its internal circuitry to chop the original voltage waveform at the first target chopping position, superimposing the digitally encoded information of the command type onto the original voltage as high-frequency pulses. At the second target chopping position, the original voltage waveform is chopped again, superimposing the digitally encoded information of the command control parameters onto the original voltage as high-frequency pulses. After these two chopping modulations, the high-frequency communication signal containing the command type and command control parameters is completely embedded within the voltage cycle of the original voltage, forming the target communication voltage, which is then transmitted to the outdoor unit along the power line.

[0065] In one embodiment, see Figure 3 and Figure 4 The voltage cycle includes an upper half-cycle and a lower half-cycle, the first target chopping position is any phase of the upper half-cycle, and the second target chopping position is any phase of the lower half-cycle.

[0066] For specific implementation details, please refer to [link / reference]. Figure 3 and Figure 4 , Figure 3 The image shows the waveform of the original voltage of the AC power supply. Figure 4The waveform of the target communication voltage is shown. When the indoor unit controller generates the chopper drive command, it divides the same voltage cycle determined in step S131 into an upper half-cycle and a lower half-cycle. The upper half-cycle corresponds to the time interval of the positive half-cycle of the AC voltage waveform, and the lower half-cycle corresponds to the time interval of the negative half-cycle of the AC voltage waveform. See also... Figure 4 Let m represent the first target chopping position and n represent the second chopping position. After dividing the cycle into upper and lower halves, the internal controller further determines that the first target chopping position is located within the upper half-cycle and the second target chopping position is located within the lower half-cycle. It should be noted that the first target chopping position is an "arbitrary phase" within the upper half-cycle; that is, as long as it is within the cycle range of that half-cycle, the specific phase point can be flexibly selected according to actual modulation requirements and is not strictly limited to a fixed phase angle. Similarly, the second target chopping position is an "arbitrary phase" within the lower half-cycle and can be freely selected according to requirements within the cycle range of the lower half-cycle.

[0067] In practical applications, the indoor controller can flexibly adjust the specific phase angles of the first and second target chopping positions within their respective half-cycles, based on the anti-interference requirements or signal transmission reliability requirements of the current communication environment. For example, when there is strong electromagnetic interference on the power line, the chopping position can be adjusted to a phase point far from the interference source within the half-cycle to improve the success rate of communication signal extraction; when it is necessary to increase the communication rate, the chopping position can also be adjusted to a phase point closer to the edge within the half-cycle to shorten the signal processing time within the half-cycle. By assigning arbitrary phases to the chopping positions within their respective half-cycles, this embodiment maintains the basic architecture of "sending commands in the first half-cycle and sending data in the second half-cycle" while providing ample selection space for the optimal configuration of communication parameters, which is beneficial to improving the adaptability and robustness of chopping communication in practical applications.

[0068] In one embodiment, see Figure 3 and Figure 5 The voltage cycle includes an upper half-cycle and a lower half-cycle. The first target chopping position is the first phase of the upper half-cycle and the second phase of the lower half-cycle. The second target chopping position is the third phase of the upper half-cycle and the fourth phase of the lower half-cycle.

[0069] In practice Figure 3 The image shows the waveform of the original voltage of the AC power supply. Figure 5 The waveform of the target communication voltage is shown. When the indoor unit controller generates the chopping drive command, it divides the same voltage cycle into an upper half-cycle and a lower half-cycle, and further splits the first target chopping position and the second target chopping position into two different phase points. For details, see [link to documentation]. Figure 5Let 'a' represent the first phase, 'b' the second phase, 'c' the third phase, and 'd' the fourth phase. The first target chopping position (used for transmitting command types) is allocated to the first phase of the upper half-cycle and the second phase of the lower half-cycle; that is, the encoded information of the command type is carried by the chopping signals at these two phase points. The second target chopping position (used for transmitting command control parameters) is allocated to the third phase of the upper half-cycle and the fourth phase of the lower half-cycle; that is, the encoded information of the command control parameters is carried by the chopping signals at these two phase points. Thus, a total of four chopping positions are formed within a complete voltage cycle, corresponding to the first and third phases of the upper half-cycle, and the second and fourth phases of the lower half-cycle, respectively.

[0070] In practical applications, this layout allows for redundant or segmented transmission of the command type and command control parameters within a single voltage cycle, each distributed across two phase points in the upper and lower halves of the cycle. For example, part of the command type information can be modulated at the first phase of the upper half-cycle, while the remaining information can be modulated at the second phase of the lower half-cycle. The external unit then merges these two parts to reconstruct the complete command type. Similarly, command control parameters can be distributed and modulated and transmitted at the third phase of the upper half-cycle and the fourth phase of the lower half-cycle.

[0071] This method of splitting a single command into two phase points for distributed transmission effectively improves the fault tolerance of communication signals. When a signal is lost or distorted at one phase point due to electromagnetic interference, the external unit can still compensate or infer the signal from the other phase point, thereby reducing the probability of communication failure caused by single-point interference and helping to improve the reliability and stability of chopper communication in complex electromagnetic environments.

[0072] In one embodiment, see Figure 6 The target communication voltage includes, within one voltage cycle, an instruction frame for transmitting the instruction type and a data frame for transmitting the instruction control parameters; the instruction frame is formed by chopping modulation of the original voltage at the first target chopping position by the chopping communication module; the data frame is formed by chopping modulation of the original voltage at the second target chopping position by the chopping communication module; wherein, both the instruction frame and the data frame include a start bit, a data bit, a check bit, and an end bit.

[0073] In practice, within a complete voltage cycle, the communication signal is logically organized into two independent frame structures: instruction frames and data frames. Instruction frames are specifically used to carry instruction type information for the target control command, such as the identification code of the operating object like "control compressor," "control fan," "control electronic expansion valve," or "control four-way valve." Data frames are specifically used to carry specific control parameter information corresponding to the instruction type, such as the compressor's operating frequency, the fan's speed setpoint, the number of opening steps of the electronic expansion valve, or the on / off status of the four-way valve—the actual execution values.

[0074] In the actual physical modulation process, the chopper communication module, based on the target chopper drive command generated by the indoor unit controller, performs chopper modulation on the original voltage waveform at the first target chopper position. The digital encoding information superimposed at this position constitutes the command frame. Simultaneously, the original voltage waveform is chopper modulated at the second target chopper position, and the digital encoding information superimposed at this position constitutes the data frame. By encapsulating the command type and command control parameters into independent frames and modulating them separately at the chopper positions, the logical hierarchy of the indoor unit control commands during transmission can be effectively ensured, facilitating the outdoor unit's separation and identification of different types of signals after reception.

[0075] Furthermore, both command frames and data frames adopt a unified standard frame format at the data link layer, meaning each frame consists of four parts: a start bit, data bits, a check bit, and an end bit. The start bit, located at the beginning of the frame, sends a frame synchronization signal to the outdoor unit's signal extraction module, indicating the start of a data frame. The data bits, located after the start bit, are the core part carrying the digital encoding of the actual command type or command control parameters. The check bit, located after the data bits, performs parity or CRC checks on the data bits to help the outdoor unit verify the integrity of the received data after demodulation and determine whether any errors occurred during transmission. The end bit, located at the end of the frame, indicates that the current frame has been transmitted completely, preparing for the reception of the next frame. Through this frame structure, the signal extraction module and the outdoor unit controller can accurately determine the start and end of each frame, and based on this, extract and verify the received command type and control parameter data, thereby effectively reducing the communication error rate caused by signal interference or bit errors and improving the overall reliability of unidirectional chopper communication.

[0076] In one embodiment, see Figure 7 The target communication voltage contains one frame of data within one voltage cycle. The frame of data includes a start bit, an instruction bit, a data bit, a check bit, and an end bit. The instruction bit is used to transmit the instruction type, and the data bit is used to transmit the instruction control parameters.

[0077] In specific implementation, this embodiment differs from the aforementioned scheme that encapsulates the instruction type and instruction control parameters into separate instruction frames and data frames. Instead, it adopts a method of merging both into a single frame of data for transmission. When generating the chopper drive instruction, the indoor unit controller encodes the instruction type and instruction control parameters of the target control instruction into a single frame of data, and drives the chopper communication module to modulate the original voltage within one voltage cycle accordingly.

[0078] The frame structure of this data frame specifically includes a start bit, command bit, data bit, check bit, and end bit. The start bit, located at the beginning of the frame, sends a frame synchronization signal to the outdoor unit's signal extraction module, marking the start of a data frame and enabling the outdoor unit to accurately identify the start time of the communication frame. The command bit, following the start bit, carries digitally encoded information about the command type, such as indicating whether the current control command is for an actuator like a compressor, fan, electronic expansion valve, or four-way valve. The data bit, following the command bit, carries encoded information about the specific execution parameters corresponding to the command type, such as the compressor's target operating frequency, the fan's target speed, the number of opening steps for the electronic expansion valve, or the on / off state of the four-way valve. The check bit, following the data bit, performs error checking on the content carried by the command and data bits, such as parity checking or CRC (Cyclic Redundancy Check), to help the outdoor unit controller verify the integrity of the received data after demodulation and determine whether any errors occurred during transmission. The end bit, located at the end of the frame, indicates that the data frame has been transmitted completely, preparing for the next possible communication.

[0079] In the actual physical modulation process, the chopper communication module, based on the target chopper drive command generated by the indoor unit controller, directly encodes and modulates a frame of data within one voltage cycle, forming a target communication voltage carrying the command type and command control parameters. After the outdoor unit's signal extraction module and outdoor unit controller extract the target communication voltage from the power line, they identify the start bit within the single frame, and sequentially extract the command bits and data bits. Finally, they verify the correctness of the data through the check bit, thereby restoring the complete original target control command and driving the corresponding actuator to operate. Compared with the two-frame time-division transmission scheme described in claim 13, the single-frame transmission method of this embodiment can complete the complete transmission of command type and command control parameters within one voltage cycle, effectively improving communication efficiency while ensuring command integrity.

[0080] S140. Control the outdoor unit to operate according to the target control command.

[0081] In practice, after demodulating and reconstructing the target control command, the outdoor unit controller drives the actuators inside the outdoor unit (such as the compressor, fan, electronic expansion valve, or four-way valve) to perform corresponding actions according to the target control command, thereby achieving precise control of the air conditioner's operating status. Since the target control command is transmitted unidirectionally from the indoor unit to the outdoor unit, the outdoor unit does not need to send any feedback signals back to the indoor unit. Therefore, this communication method is suitable for air conditioning applications where only unidirectional control of the outdoor unit by the indoor unit is required.

[0082] In summary, the communication control method of this embodiment, when applied to the above-mentioned air conditioner with one-way communication between indoor and outdoor units, eliminates the need for an additional dedicated communication line between the indoor and outdoor units. The air conditioner can complete the one-way transmission of control commands from the indoor unit to the outdoor unit using only the existing power line, thereby simplifying the electrical connection structure between the indoor and outdoor units and effectively reducing cable costs while ensuring communication reliability.

[0083] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A one-way communication air conditioner between indoor and outdoor units, characterized in that, include: An indoor unit and an outdoor unit, wherein the indoor unit is connected to the outdoor unit via a power cord to provide AC power to the outdoor unit; The indoor unit is equipped with an indoor unit controller and a chopper communication module. The chopper communication module is connected to the indoor unit controller and the power line, and is used to modulate the control commands of the indoor unit controller into high-frequency communication signals and superimpose them onto the power line. The outdoor unit is equipped with an outdoor unit controller and a signal extraction module. The signal extraction module is connected to the output end of the outdoor unit controller and the power line, and is used to extract the high-frequency communication signal from the power line to the outdoor unit controller. The outdoor unit controller demodulates the control command and executes it.

2. The indoor / outdoor unit one-way communication air conditioner according to claim 1, characterized in that, The power cord includes a live wire and a neutral wire. The chopper communication module is connected to the input terminal of the live wire and / or the neutral wire. The high-frequency communication signal is superimposed on the live wire and / or the neutral wire.

3. The air conditioner with one-way communication between indoor and outdoor units according to claim 1, characterized in that, The indoor unit is equipped with a power monitoring module and a first voltage acquisition module. The first voltage acquisition module is connected to the power cord and is used to detect the voltage of the AC power supply. The power monitoring module is connected to the first voltage acquisition module and the indoor unit controller and is used to calculate the voltage period, voltage amplitude, and voltage phase of the AC power supply and feed them back to the indoor unit controller.

4. The air conditioner with one-way communication between indoor and outdoor units according to claim 1, characterized in that, The signal extraction module includes a signal processing module and a second voltage acquisition module. The second voltage acquisition module is connected to the output end of the power line and is used to separate the high-frequency communication signal from the power line. The signal processing module is connected to the second voltage acquisition module and the outdoor unit controller and is used to amplify and filter the high-frequency communication signal before outputting it to the outdoor unit controller.

5. The indoor / outdoor unit unidirectional communication air conditioner according to any one of claims 1-4, characterized in that, The indoor unit is equipped with a first power module. The input terminal of the first power module is used to connect to AC power. The output terminal of the first power module is connected to at least the indoor unit controller. The input terminal of the power cord is connected in parallel with the input terminal of the first power module to transmit AC power to the outdoor unit.

6. The indoor / outdoor unit one-way communication air conditioner according to claim 5, characterized in that, The first power module includes a first rectifier circuit and a first switching power supply. The input terminal of the first rectifier circuit is used to connect to an AC power source, the output terminal of the first rectifier circuit is connected to the input terminal of the first switching power supply, and the output terminal of the first switching power supply is connected to at least the indoor unit controller.

7. The indoor / outdoor unit unidirectional communication air conditioner according to any one of claims 1-4, characterized in that, The outdoor unit is equipped with a second power module. The input terminal of the second power module is connected to the output terminal of the power cord to obtain AC power. The output terminal of the second power module is connected to at least the outdoor unit controller.

8. The indoor / outdoor unit one-way communication air conditioner according to claim 7, characterized in that, The second power module includes a second rectifier circuit and a second switching power supply. The input terminal of the second rectifier circuit is connected to the output terminal of the power line, the output terminal of the second rectifier circuit is connected to the input terminal of the second switching power supply, and the output terminal of the second switching power supply is connected to at least the outdoor unit controller.

9. A communication control method for an air conditioner, characterized in that, Applied to the indoor / outdoor unit one-way communication air conditioner according to any one of claims 1-8, the method includes: The original voltage transmitted on the power line is obtained, and the voltage information of the original voltage is calculated, including voltage amplitude, voltage phase and voltage period; Based on the target control command and the voltage information, the chopper communication module is driven to modulate the original voltage into the target communication voltage; The target communication voltage on the power line is extracted by the signal extraction module, and the target communication voltage is demodulated to obtain the target control command. The outdoor unit is controlled to operate according to the target control command.

10. The method according to claim 9, characterized in that, The step of driving the chopper communication module to modulate the original voltage into the target communication voltage based on the target control command and the voltage information includes: The voltage period is determined based on the voltage information; Determine the instruction type and instruction control parameters of the target control instruction; The first target chopping position is determined according to the instruction type, and the second target chopping position is determined according to the instruction control parameters; both the first target chopping position and the second target chopping position are located within the same voltage cycle of the original voltage. A target chopping drive command is generated based on the first target chopping position and the second target chopping position. The target chopping drive command is used to cause the chopping communication module to perform chopping modulation on the original voltage at the first target chopping position and the second target chopping position to form the target communication voltage.

11. The method according to claim 10, characterized in that, The voltage cycle includes an upper half-cycle and a lower half-cycle, the first target chopping position is any phase of the upper half-cycle, and the second target chopping position is any phase of the lower half-cycle.

12. The method according to claim 10, characterized in that, The voltage cycle includes an upper half-cycle and a lower half-cycle. The first target chopping position is the first phase of the upper half-cycle and the second phase of the lower half-cycle. The second target chopping position is the third phase of the upper half-cycle and the fourth phase of the lower half-cycle.

13. The method according to claim 10, characterized in that, The target communication voltage includes, within one voltage cycle, an instruction frame for transmitting the instruction type and a data frame for transmitting the instruction control parameters. The instruction frame is formed by the chopper communication module through chopping modulation at the first target chopping position of the original voltage; the data frame is formed by the chopper communication module through chopping modulation at the second target chopping position of the original voltage. Both the instruction frame and the data frame include a start bit, data bits, a check bit, and an end bit.

14. The method according to claim 10, characterized in that, The target communication voltage contains one frame of data within one voltage cycle. The frame of data includes a start bit, an instruction bit, a data bit, a check bit, and an end bit. The instruction bit is used to transmit the instruction type, and the data bit is used to transmit the instruction control parameters.

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