Power supply system and method and air conditioner

Abstract

The invention relates to the field of household appliances, and provides a power supply system, a method, an air conditioner, a system power supply module, a communication bus and an indoor unit, the communication bus is connected with the indoor unit, the indoor unit comprises a control module and a load module, the control module is electrically connected with the communication bus, and the control module is electrically connected with the load module; when the indoor unit loses mains supply, the power supply module supplies power to the control module through the communication bus, and the control module controls the load module to be powered off. The problem that enough voltage cannot be obtained after the indoor unit is powered off due to the communication distance is solved, and the use efficiency of the power supply is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and particularly to a power supply system, a method and an air conditioner. Background Art

[0002] As the communication distance requirements for HVAC equipment in buildings are getting higher and higher, and the number of indoor units to be matched is increasing. After the indoor unit loses power, due to the long communication line distance and the large number of indoor unit devices, and there is line resistance in the communication line. The longer the distance, the greater the line resistance, and the larger the wire diameter, the smaller the line loss, but the larger the wire diameter, the higher the cost. Therefore, for long-distance transmission communication, the line loss will cause the DC power supply voltage to drop, resulting in the indoor unit being unable to obtain a sufficiently high voltage value and the indoor unit being unable to operate. In addition, abnormal power failure will also cause some uncontrollable phenomena, such as the electronic expansion valve cannot return to the specified position due to lack of power, the key parameters of the equipment cannot be saved in time, and the equipment is in an unstable state, etc., resulting in the air-conditioning equipment being out of control and easily damaged.

[0003] Currently, mainly by installing repeaters at preset intervals on the communication line to increase the voltage on the communication line to avoid the situation that the indoor unit cannot obtain sufficient voltage due to the long communication line distance. However, the above method of increasing the voltage on the communication line by repeaters does not fundamentally solve the problem, and because the repeaters occupy a certain cost, it is easy to cause cost waste; and, a repeater needs to be installed within a fixed distance, and the utilization rate of many repeaters is low or even completely unused, resulting in waste of resources, and the manual installation is relatively cumbersome, which is easy to cause waste of labor costs. Summary of the Invention

[0004] The present invention provides a power supply system, a method and an air conditioner to solve the defect in the prior art that the indoor unit cannot obtain sufficient voltage after losing power due to the long communication line distance, and can fundamentally solve the problem of power loss of the indoor unit, reduce costs, and avoid waste of resources.

[0005] The present invention provides a power supply system, including a power supply module, a communication bus and an indoor unit. The communication bus is connected to the indoor unit. The indoor unit includes a control module and a load module. The control module is electrically connected to the communication bus, and the control module is electrically connected to the load module; based on the indoor unit losing the mains power, the power supply module supplies power to the control module through the communication bus, and the control module controls the load module to cut off the power.

[0006] The power supply module supplies power to the control module of the indoor unit through the communication bus, so that the control module can control the load module to disconnect, so as to reduce the supply current required by the indoor unit on the basis of avoiding driving a large load, make the system in a low-power state, facilitate the power supply module to supply power to the control module, maintain the operation of the abnormal indoor unit, and improve the power supply quality.

[0007] According to the present invention, a power supply system is provided. The control module includes an AC high-resistance loop unit, a communication unit, a power supply unit, and a control unit, wherein: the AC high-resistance loop unit is respectively connected to a communication bus, the communication unit, and the power supply unit. The AC high-resistance loop unit receives and divides the DC power supply and the control signal sent by the communication bus. The control signal is transmitted to the control unit through the communication unit, and the DC power supply powers the control unit through the power supply unit; based on the power supply of the power supply unit, the control unit performs corresponding actions according to the parsed control signal.

[0008] It should be added that sending the DC power supply and the control signal to the indoor unit through the communication bus can not only realize indoor-outdoor communication but also provide power energy for the indoor unit. And the control signal and the DC power supply are divided by the AC high-resistance unit, so that the parsed control signal is sent to the control unit through the communication unit, and the DC power supply is sent to the control unit through the power supply unit to provide power support for the control unit, enabling it to execute the relevant actions corresponding to the control signal and entering the sleep state again after executing the relevant actions, thereby reducing the basic power consumption. By using the communication bus to supply power to the abnormal indoor unit, the stability and reliability of the air-conditioning equipment are greatly improved.

[0009] According to the present invention, a power supply system is provided. The control module includes an AC high-resistance unit, a standby wake-up unit, a communication unit, and a control unit, wherein: the AC high-resistance unit is respectively connected to the standby wake-up unit and the communication unit. The AC high-resistance unit receives and divides the preset level and the control signal sent by the communication bus, sends the preset level to the standby wake-up unit, and sends the control signal to the communication unit; wherein, the preset level is a level signal sent based on a preset protocol, and the preset protocol is used to define the sending frequencies of the high level and the low level; the standby wake-up unit controls whether the control unit is powered on according to the preset level; the communication unit parses the control signal and sends the parsed control signal to the control unit; based on the power-on controlled by the standby wake-up unit, the control unit performs corresponding actions according to the parsed control signal.

[0010] It should be added that the standby wake-up unit discharges to the control unit according to the preset level conforming to the preset protocol, so that the control unit executes the relevant actions according to the parsed control signal sent by the communication unit and enters the sleep state again after executing the relevant actions, thereby reducing the basic power consumption. By controlling the power supply device of the standby wake-up unit in the abnormal indoor unit to supply power to the control unit through the preset level, the stability and reliability of the air-conditioning equipment are greatly improved.

[0011] According to the present invention, a power supply system is provided. The load module further includes a power switch unit, a load unit, a current detection unit, and a storage unit. The power switch unit is respectively connected to the communication bus and the load unit. The load unit is respectively connected to the control unit and the current detection unit. The control unit is respectively connected to the current detection unit and the storage unit. Wherein: in the case of losing the mains power, the control unit controls the power switch unit to disconnect the connections of the load unit, the current detection unit, and the storage unit, and stops supplying power to the load unit, the current detection unit, and the storage unit; in the case of restoring the mains power, the control unit controls the power switch unit to connect the communication bus, the load unit, the current detection unit, and the storage unit, and the power supply module supplies power to the load unit, the current detection unit, and the storage unit through the communication bus; the current detection unit detects whether the load unit is short-circuited based on the power supply, and the storage unit stores the indoor unit data based on the power supply.

[0012] It should be noted that in the case of losing the mains power, by using the power switch unit, the connection between the communication bus and the load unit, the current detection unit, and the storage unit is controlled to be disconnected, so as to cut off the connection between the indoor unit circuit and the communication bus. On the basis of avoiding driving a large load, the supply current required by the indoor unit is reduced, the communication line loss is reduced, the system is in a low-power state, and thus the power supply quality is improved; when the indoor unit resumes mains power supply, the power switch unit triggers to supply energy to the load unit, the current detection unit, and the storage unit.

[0013] According to the present invention, a power supply system is provided. The power supply module includes an outdoor unit. The outdoor unit is connected to the communication bus. The outdoor unit loads power and communication signals to the indoor unit through the communication bus, or the outdoor unit loads a preset level and control signals to the indoor unit through the communication bus; wherein, the preset level is a level signal sent based on a preset protocol, and the preset protocol is used to limit the sending frequencies of the high level and the low level; or, the system includes at least two indoor units, the at least two indoor units are connected in parallel, the power supply module is the other indoor unit closest to the abnormal indoor unit in terms of communication distance, the other indoor unit is connected to the communication bus, and loads power and communication signals to the indoor unit through the communication bus.

[0014] It should be noted that by using the power supply of the outdoor unit to power the communication bus to supply power to the abnormal indoor unit, or by using the power supply device that presets the level to control the standby wake-up circuit module in the abnormal indoor unit to supply power to the abnormal indoor unit, the stability and reliability of the air-conditioning equipment are greatly improved. While realizing indoor-outdoor communication, it is also possible to control the power energy provided to the indoor unit. Or, use other indoor units that are closest to the abnormal indoor unit in terms of communication distance to supply power to the abnormal indoor unit. On the basis of reducing the voltage loss on the communication bus, dynamically control the indoor unit to provide emergency power to the abnormal indoor unit nearby, improve the power transmission efficiency and utilization rate, and since the current on the communication line is small, the amplitude of the communication signal will also be significantly improved, thereby improving the communication stability, realizing intelligent, reasonable and energy-saving power supply, and improving the power usage efficiency.

[0015] The present invention also provides a power supply method, including the above power supply system. The method includes: the outdoor unit determines whether the bus voltage sent by the abnormal indoor unit received first is lower than a preset voltage threshold; wherein, the abnormal indoor unit refers to the indoor unit that has lost the mains power supply, and the bus voltage is obtained by the indoor unit based on the detected power supply loaded on the communication bus; based on the bus voltage not being lower than the preset voltage threshold, the outdoor unit supplies power to the control module through the communication bus, and the control module controls the load module to cut off the power.

[0016] It should be noted that by the outdoor unit determining whether the bus voltage sent by the abnormal indoor unit first is lower than the preset voltage threshold to determine whether to directly use the outdoor unit to supply power to the abnormal indoor unit, and by the indoor unit control module controlling the load module to disconnect, thereby on the basis of avoiding driving a large load, reducing the supply current required by the indoor unit, making the system in a low-power state, facilitating the power supply module to supply power to the control module, maintaining the operation of the abnormal indoor unit, and improving the power supply quality.

[0017] According to the power supply method provided by the present invention, based on the bus voltage not being lower than the preset voltage threshold, the outdoor unit supplies power to the control module through the communication bus, and the control module controls the load module to cut off the power, including: the outdoor unit loads power and communication signals to the indoor unit through the communication bus; the indoor unit uses the power to supply power to the control module, the control module closes the load module based on the power supply control, and executes corresponding actions according to the control signal; or, the outdoor unit loads a preset level and control signal to the indoor unit through the communication bus; the indoor unit determines whether the preset level conforms to the preset protocol, and based on the preset level conforming to the preset protocol, controls to supply power to the control module, the control module closes the load module based on the power supply control, and executes corresponding actions according to the control signal.

[0018] It should be noted that when the mains power is lost, the outdoor unit supplies power to the control module or the outdoor unit control supplies power to the control module, and the control module controls the load module to be turned off, so as to reduce the power supply current required by the indoor unit on the basis of avoiding driving a large load, making the system in a low-power state. Thus, through the power supply of the outdoor unit, the operation of the abnormal indoor unit is maintained, greatly improving the stability and reliability of the air-conditioning equipment. While realizing indoor-outdoor communication, it can also control the power supply energy provided to the indoor unit, improving the power supply quality.

[0019] According to a power supply method provided by the present invention, the indoor unit includes a bus voltage detection module, an indoor communication module, and an indoor main control module. Before the outdoor unit determines whether the bus voltage sent by the abnormal indoor unit received previously is lower than a preset voltage threshold, it includes: based on the unified power-on of the outdoor unit and the indoor unit, the outdoor unit controls to output power to the communication bus; the bus voltage detection module detects the voltage of the communication bus and transmits the detected bus voltage to the indoor main control module; the indoor main control module controls the indoor communication module to send a voltage communication signal to the communication bus according to the bus voltage, so as to transmit the detected bus voltage to the outdoor unit; the outdoor unit receives the voltage communication signal and controls to stop outputting power to the communication bus.

[0020] It should be noted that after the outdoor unit and the indoor unit are powered on uniformly, the outdoor unit loads the communication bus with wires for the indoor unit to detect, and sends the detected bus voltage to the outdoor unit, which is convenient for the subsequent outdoor unit to determine whether to directly use the outdoor unit control to supply power to the abnormal indoor unit or use other indoor units closest to the abnormal indoor unit in terms of communication distance to supply power to the abnormal indoor unit, realizing intelligent, reasonable, and energy-saving power supply and improving the power usage efficiency.

[0021] According to a power supply method provided by the present invention, the outdoor unit includes an outdoor main control module and an outdoor power supply switch module. Based on the unified power-on of the outdoor unit and the indoor unit, the outdoor unit controls to output power to the communication bus, including: based on the unified power-on of the outdoor unit and the indoor unit, the outdoor main control module sends a power loading signal for loading power to the communication bus to the outdoor power supply switch module; the outdoor power supply switch module converts the mains power into a DC power supply based on the received power loading signal and loads the DC power supply onto the communication bus; the outdoor unit receives the voltage communication signal and controls to stop outputting power to the communication bus, including: the outdoor communication module receives the voltage communication signal through the communication bus and sends the voltage communication signal to the outdoor main control module; the outdoor main control module generates a stop loading signal according to the voltage communication signal and sends the stop loading signal to the outdoor power supply switch module; the outdoor power supply switch module stops loading the DC power supply onto the communication bus according to the stop loading signal.

[0022] It should be noted that after the outdoor unit and the indoor unit are powered on uniformly, the outdoor main control module sends a power loading signal to the outdoor power supply switch module to control the outdoor power supply switch module to load DC power to the communication bus, facilitating the indoor unit to detect the voltage on the communication bus. Correspondingly, after the outdoor communication module receives the voltage communication signal, the outdoor main control module controls the outdoor power supply switch module to stop loading DC power to the communication bus, avoiding unnecessary energy waste.

[0023] According to the power supply method provided by the present invention, the outdoor unit determines whether the bus voltage sent by the abnormal indoor unit received earlier is lower than a preset voltage threshold, and further includes: based on the bus voltage being lower than the preset voltage threshold, the outdoor unit determines the other indoor units with the closest communication distance to the abnormal indoor unit according to the bus voltages sent by all indoor units earlier, and controls the other indoor units with the closest communication distance to the abnormal indoor unit to supply power to the abnormal indoor unit.

[0024] By transmitting current from the outdoor unit to the communication bus to receive the bus voltages returned by each indoor unit based on detecting the communication bus, so that when the bus voltage is lower than the preset voltage threshold, according to the bus voltage and in combination with the principle of power supply nearby, control the other indoor units with the closest distance to the powered-off indoor unit to supply power to it, so as to dynamically control the indoor unit to provide emergency power nearby for the abnormal indoor unit on the basis of reducing the voltage loss on the communication bus, improve the power transmission efficiency and utilization rate, and since the current on the communication line is small, the amplitude of the communication signal will also be significantly increased, thereby improving the communication stability, greatly improving the stability and reliability of the air-conditioning equipment, realizing intelligent, reasonable and energy-saving power supply, and improving the power usage efficiency.

[0025] According to a power supply method provided by the present invention, the indoor unit further includes an indoor main control module, an indoor communication module, and an indoor power supply switch module. After the outdoor unit controls the other indoor unit closest to the abnormal indoor unit in communication distance to supply power to the abnormal indoor unit, it further includes: after the outdoor unit controls the other indoor unit closest to the abnormal indoor unit in communication distance to supply power to the abnormal indoor unit, the indoor main control module of the abnormal indoor unit stores key parameters and controls the indoor communication module of the abnormal indoor unit to report information to the outdoor unit through the communication bus; the indoor main control module of the abnormal indoor unit controls the corresponding indoor communication module to return a response signal to the other indoor unit closest to the abnormal indoor unit in communication distance through the communication bus; the indoor communication module of the other indoor unit closest to the abnormal indoor unit in communication distance sends the received response signal to the corresponding indoor main control module to control the corresponding indoor power supply switch module to stop supplying power to the abnormal indoor unit; or, the indoor main control module of the abnormal indoor unit stores key parameters and controls the indoor communication module of the abnormal indoor unit to return a response signal and an information reporting signal to the other indoor unit closest to the abnormal indoor unit in communication distance through the communication bus; the indoor communication module of the other indoor unit closest to the abnormal indoor unit in communication distance sends the received response signal to the corresponding indoor main control module to control the corresponding indoor power supply switch module to stop supplying power to the abnormal indoor unit, and controls the corresponding indoor communication module to upload the received information reporting signal to the outdoor unit through the communication bus.

[0026] The indoor main control module of the abnormal indoor unit controls the indoor communication module to report information to the outdoor unit through the communication bus, so that the outdoor unit can know the abnormal situation of the abnormal indoor unit and facilitate determining whether to continue using the abnormal indoor unit subsequently. In addition, the indoor main control module of the abnormal indoor unit controls the indoor communication module to send a response signal to the indoor communication module of the other indoor unit closest in distance through the communication bus; the indoor communication module of the other indoor unit sends the response signal to the indoor main control module, and the indoor main control module controls the indoor power supply switch module to stop supplying power to the abnormal indoor unit according to the response signal, thereby maintaining the security of the communication bus.

[0027] The present invention also provides an air conditioner including any one of the above power supply systems.

[0028] The present invention also provides an electronic device including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, the steps of the power supply method as described in any one of the above are implemented.

[0029] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of the power supply method as described in any one of the above are implemented. Description of the Drawings

[0030] To more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0031] Figure 1 is one of the schematic structural diagrams of the power supply system provided by the present invention; Figure 2 is another schematic structural diagram of the power supply system provided by the present invention; Figure 3 is yet another schematic structural diagram of the power supply system provided by the present invention; Figure 4 is still another schematic structural diagram of the power supply system provided by the present invention; Figure 5 is the schematic flowchart of the power supply method provided by the present invention; Figure 6 is the schematic structural diagram of the electronic device provided by the present invention; Reference numerals: 1: Outdoor unit; 11: Outdoor main control module; 12: Outdoor communication module; 13: Outdoor power supply switch module; 14: Outdoor drive module; 2: Indoor unit; 21: Abnormal outdoor unit; 22: Other indoor units closest to the abnormal outdoor unit in terms of communication distance; 23: Indoor main control module; 24: Indoor communication module; 25: Bus voltage detection module; 26: Indoor power supply switch module; 27: Indoor drive module; 28: AC high-resistance unit; 29: Communication unit; 210: Power supply unit; 211: Control unit; 212: Power switch unit; 213: Load unit; 214: Current detection unit; 215: Storage unit; 216: Standby wake-up unit; 3: Communication bus. Detailed implementation manners

[0032] To make the objectives, technical solutions, and advantages of the present invention clearer, the following will clearly and completely describe the technical solutions in the present invention with reference to the drawings in the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments in the present invention belong to the scope of protection of the present invention.

[0033] The following will describe Figures 1 to 4 a power supply system of the present invention with reference to Figure 1, the system includes a power supply module, a communication bus 3, and an indoor unit 2. The communication bus 3 is connected to the indoor unit 2. The indoor unit includes a control module and a load module. The control module is electrically connected to the communication bus and is also electrically connected to the load module. Based on the loss of mains power in the indoor unit 2, the power supply module supplies power to the control module through the communication bus, and the control module controls the load module to cut off power.

[0034] In this embodiment, referring to Figure 2 , the control module includes an AC high resistance unit 28, a communication unit 29, a power supply unit 210, and a control unit 211, where: the AC high resistance unit 28 is respectively connected to the communication bus 3, the communication unit 29, and the power supply unit 210. The AC high resistance unit 28 receives and divides the DC power supply and the control signal sent by the communication bus 3. The control signal is transmitted to the control unit 211 through the communication unit 29, and the DC power supply supplies power to the control unit 211 through the power supply unit 210. The control unit 211 performs corresponding actions based on the power supply of the power supply unit 210 according to the parsed control signal.

[0035] It should be added that sending the DC power supply and the control signal to the indoor unit through the communication bus can not only achieve indoor and outdoor communication but also provide power energy for the indoor unit. And by using the AC high resistance unit to divide the control signal and the DC power supply, the parsed control signal is sent to the control unit through the communication unit, and the DC power supply is sent to the control unit through the power supply unit to provide power support for the control unit, enabling it to perform the relevant actions corresponding to the control signal and resume dormancy after performing the relevant actions, thereby reducing the basic power consumption. By using the communication bus to supply power to the abnormal indoor unit, the stability and reliability of the air conditioning equipment are greatly improved.

[0036] In addition, the load module further includes a power switch unit 212, a load unit 213, a current detection unit 214, and a storage unit 215. The power switch unit 212 is respectively connected to the communication bus 3 and the load unit 213. The load unit 213 is respectively connected to the control unit 211 and the current detection unit 214. The control unit 211 is respectively connected to the current detection unit 214 and the storage unit 215, where: in the case of loss of mains power, the control unit 211 disconnects the connections of the load unit 213, the current detection unit 214, and the storage unit 215 by controlling the power switch unit 212 to stop supplying power to the load unit 213, the current detection unit 214, and the storage unit 215. In the case of restoration of mains power, the control unit 211 connects the communication bus 3, the load unit 213, the current detection unit 214, and the storage unit 215 by controlling the power switch unit 212, and the power supply module supplies power to the load unit 213, the current detection unit 214, and the storage unit 215 through the communication bus 3. The current detection unit 214 detects whether the load unit 213 is short-circuited based on the power supply, and the storage unit 215 stores the indoor unit data based on the power supply.

[0037] It should be noted that when the mains power is lost, the power switch unit is used to control the disconnection of the communication bus from the load unit, the current detection unit and the storage unit, so as to cut off the connection between the indoor unit circuit and the communication bus. On the basis of avoiding driving a large load, the supply current required by the indoor unit is reduced, the communication line loss is reduced, so that the system is in a low-power state, thereby improving the power supply quality; when the indoor unit resumes mains power supply, the power switch unit triggers to supply energy to the load unit, the current detection unit and the storage unit.

[0038] In an alternative embodiment, referring to Figure 3 , the control module includes an AC high-resistance unit 28, a standby wake-up unit 29, a communication unit 210 and a control unit 211, where: the AC high-resistance unit 28 is respectively connected to the standby wake-up unit 29 and the communication unit 210. The AC high-resistance unit 28 receives the preset level and the control signal sent by the communication bus 3 and divides them, sends the preset level to the standby wake-up unit 29, and sends the control signal to the communication unit 210; wherein, the preset level is a level signal sent based on a preset protocol, and the preset protocol is used to define the sending frequencies of the high level and the low level; the standby wake-up unit 29 controls whether the control unit is powered on according to the preset level; the communication unit 210 analyzes the control signal and sends the analyzed control signal to the control unit 211; the control unit 211 performs corresponding actions based on the power-on controlled by the standby wake-up unit 29 according to the analyzed control signal.

[0039] It should be added that the preset protocol can be selected in advance based on design requirements, such as switching between sending a high level of 1 ms and a low level of 1 ms multiple times, and no further limitation is made here. In addition, the standby wake-up unit discharges to the control unit according to the preset level conforming to the preset protocol, so that the control unit performs relevant actions according to the analyzed control signal sent by the communication unit, and resumes dormancy after performing the relevant actions, thereby reducing the basic power consumption. The power supply device of the standby wake-up unit in the abnormal indoor unit supplies power to the control unit through the preset level, greatly improving the stability and reliability of the air-conditioning equipment.

[0040] In addition, the load module further includes a power switch unit 212, a load unit 213, a current detection unit 214 and a storage unit 215, which can be specifically referred to as described above, and will not be repeated here.

[0041] In an alternative embodiment, the power supply module includes an outdoor unit 1, which is connected to a communication bus 3. The outdoor unit 1 loads power and communication signals to an indoor unit 2 through the communication bus 3, or the outdoor unit 1 loads a preset level and control signals to the indoor unit 2 through the communication bus 3. Wherein, the preset level is a level signal sent based on a preset protocol, and the preset protocol is used to define the transmission frequencies of high and low levels. Or, the system includes at least two indoor units 2, and the at least two indoor units 2 are connected in parallel. The power supply module is another indoor unit 22 that is closest to the abnormal indoor unit 21 in terms of communication distance. The other indoor unit 22 is connected to the communication bus 3 and loads power and communication signals to the indoor unit through the communication bus 3.

[0042] It should be noted that by using the power supply of the outdoor unit to power the communication bus to supply power to the abnormal indoor unit, or by using the preset level to control the power supply device of the standby wake-up circuit module in the abnormal indoor unit to supply power to the abnormal indoor unit, the stability and reliability of the air-conditioning equipment are greatly improved. While realizing indoor-outdoor communication, it is also possible to control the power energy provided to the indoor unit. Or, use another indoor unit that is closest to the abnormal indoor unit in terms of communication distance to supply power to the abnormal indoor unit. On the basis of reducing the voltage loss on the communication bus, dynamically control the indoor unit to provide emergency power to the abnormal indoor unit nearby, improve the power transmission efficiency and utilization rate, and since the current on the communication line is small, the amplitude of the communication signal will also be significantly improved, thereby improving the communication stability, realizing intelligent, reasonable and energy-saving power supply, and improving the power usage efficiency.

[0043] Specifically, referring to Figure 4 , when the system includes at least two indoor units, the outdoor unit 1 includes an outdoor main control module 11 and an outdoor communication module 12. The outdoor main control module 11 is connected to the outdoor communication module 12, and the outdoor communication module 12 is connected to the communication bus 3. Wherein: the outdoor main control module 11 sends a control signal to the outdoor communication module 12; the outdoor communication module 12 loads a communication detection signal onto the communication bus 3 according to the control signal. If the outdoor communication module 12 receives signals returned by each indoor unit 2 based on the detected communication detection signal on the communication bus 3, the outdoor communication module 12 sends the received return signal to the outdoor main control module 11; the outdoor main control module 11 determines that the communication with the corresponding indoor unit 2 is normal according to the return signal.

[0044] It should be noted that the indoor unit 2 includes an indoor main control module 23 and an indoor communication module 24. The outdoor main control module 11 controls the outdoor communication module 12 to load a communication detection signal onto the communication bus 3. If the communication of the indoor unit 2 is normal, the indoor communication module 24 receives the communication detection signal and sends the received communication detection signal to the indoor main control module 23. The indoor main control module 23 controls the indoor communication module 24 to return a signal to the communication bus 3 according to the communication detection signal. The outdoor communication module 12 receives the returned signal and sends it to the outdoor main control module 11 to confirm that the communication with the corresponding indoor unit 2 is normal. If the communication of the indoor unit 2 is abnormal, the indoor unit 2 cannot return a signal to the outdoor unit 1, so that the outdoor unit 1 cannot receive the signal returned by the indoor unit 2.

[0045] In addition, the indoor unit 2 includes an indoor communication module 24 and an indoor main control module 23. The indoor communication module 24 is respectively connected to the communication bus 3 and the indoor main control module 24. The indoor main control module 23 sends a control signal to the indoor communication module. The indoor communication module 24 loads the communication detection signal onto the communication bus 3 according to the communication signal. If the indoor communication module 24 receives the signal returned by the outdoor unit 1 based on the communication detection signal, the indoor communication module 24 sends the received returned signal to the indoor main control module 23. The indoor main control module 23 determines that the communication with the outdoor unit 1 is normal according to the returned signal.

[0046] Similarly, if the communication of the indoor unit 2 is abnormal, it cannot send the communication detection signal normally and cannot receive the signal returned by the outdoor unit 1 based on the communication detection signal. If the communication of the indoor unit 2 is normal, the indoor main control module 23 controls the indoor communication module 24 to load the communication detection signal onto the communication bus 3. The outdoor communication module 12 receives the communication detection signal and transmits it to the outdoor main control module 11. The outdoor main control module 11 controls the outdoor communication module 12 to return a signal to the communication bus 3 according to the communication detection signal. The indoor communication module 24 receives the returned signal and transmits it to the indoor main control module 23 to confirm that the communication with the corresponding outdoor unit is normal.

[0047] It should be added that by detecting the communication between the indoor unit and the outdoor unit, in the case where the indoor unit loses power and the communication is normal, the outdoor unit can be notified in time. Or, when the indoor unit loses power and the communication is abnormal, the outdoor unit can timely learn that the indoor unit has an abnormality, so as to facilitate the outdoor unit to determine whether it is necessary to control the indoor unit with the closest communication distance to supply power to it.

[0048] In an alternative embodiment, the outdoor unit 1 further includes an outdoor drive module 14 for providing drive. The indoor unit 2 further includes an indoor drive module 27 for providing drive for the indoor unit 2.

[0049] Further, the outdoor drive module includes a compressor drive circuit or a relay drive circuit; the indoor drive module includes a compressor drive circuit or a relay drive circuit. In addition, the outdoor power supply switch module converts the mains power into a low-voltage DC power supply to supply power to the outdoor drive module, and the indoor power supply switch module converts the mains power into a low-voltage DC power supply to supply power to the indoor drive module.

[0050] In summary, the power supply module in the embodiment of the present invention supplies power to the control module of the indoor unit through the communication bus, so that the control module controls the load module to disconnect, so as to reduce the power supply current required by the indoor unit on the basis of avoiding driving a large load, so that the system is in a low-power state, facilitating the power supply module to supply power to the control module, maintaining the operation of the abnormal indoor unit, and improving the power supply quality.

[0051] The power supply method provided by the present invention will be described below. The power supply method described below can be correspondingly referred to the power supply system described above.

[0052] Figure 5 A power supply method is shown, which is applied to the above power supply system. The method includes: S51, the outdoor unit determines whether the bus voltage sent by the abnormal indoor unit received previously is lower than a preset voltage threshold; wherein, the abnormal indoor unit refers to an indoor unit that has lost the mains power, and the bus voltage is obtained by the indoor unit based on the detected power supply loaded on the communication bus; S52, based on the bus voltage not being lower than the preset voltage threshold, the outdoor unit supplies power to the control module through the communication bus, and the control module controls the load module to cut off the power.

[0053] In this embodiment, in step S51, the indoor unit includes a bus voltage detection module, an indoor communication module, and an indoor main control module. Before the outdoor unit determines whether the bus voltage sent by the abnormal indoor unit received previously is lower than the preset voltage threshold, it includes: based on the unified power-on of the outdoor unit and the indoor unit, the outdoor unit controls to output power to the communication bus; the bus voltage detection module detects the voltage of the communication bus and transmits the detected bus voltage to the indoor main control module; the indoor main control module controls the indoor communication module to send a voltage communication signal to the communication bus according to the bus voltage, so as to transmit the detected bus voltage to the outdoor unit; the outdoor unit receives the voltage communication signal and controls to stop outputting power to the communication bus.

[0054] It should be noted that the mains power supply for the outdoor unit and the indoor unit is provided by separate power cables, and the communication bus uses a dedicated communication cable. Specifically, the corresponding cable can be selected according to actual requirements, and no further limitation is made here. In addition, after the outdoor unit and the indoor unit are powered on uniformly, the outdoor unit loads power on the communication bus for the indoor unit to detect, and sends the detected bus voltage to the outdoor unit, so that the outdoor unit can determine whether to directly use the outdoor unit to supply power to the abnormal indoor unit or use other indoor units closest to the abnormal indoor unit in terms of communication distance to supply power to the abnormal indoor unit based on whether the bus voltage is lower than the preset voltage threshold, realizing intelligent, reasonable, and energy-saving power supply and improving the power usage efficiency.

[0055] Specifically, the outdoor unit includes an outdoor main control module and an outdoor power supply switch module. Based on the uniform power-on of the outdoor unit and the indoor unit, the outdoor unit controls the output of power to the communication bus, including: based on the uniform power-on of the outdoor unit and the indoor unit, the outdoor main control module sends a power loading signal to the outdoor power supply switch module to load power on the communication bus; the outdoor power supply switch module converts the mains power into a DC power supply based on the received power loading signal and loads the DC power supply onto the communication bus.

[0056] It is worth noting that after the outdoor unit and the indoor unit are powered on uniformly, the outdoor main control module sends a power loading signal to the outdoor power supply switch module to control the outdoor power supply switch module to load a DC power supply onto the communication bus, facilitating the indoor unit to detect the voltage on the communication bus.

[0057] In addition, the outdoor unit receives a voltage communication signal and controls the stop of power output to the communication bus, including: the outdoor communication module receives the voltage communication signal through the communication bus and sends the voltage communication signal to the outdoor main control module; the outdoor main control module generates a stop loading signal according to the voltage communication signal and sends the stop loading signal to the outdoor power supply switch module; the outdoor power supply switch module stops loading the DC power supply onto the communication bus according to the stop loading signal.

[0058] Correspondingly, after the outdoor communication module receives the voltage communication signal, the outdoor main control module controls the outdoor power supply switch module to stop loading the DC power supply onto the communication bus, avoiding unnecessary energy waste.

[0059] In step S52, in an optional embodiment, based on the bus voltage not being lower than the preset voltage threshold, the outdoor unit supplies power to the control module through the communication bus, and the control module controls the load module to cut off power, including: the outdoor unit loads power and communication signals to the indoor unit through the communication bus; the indoor unit receives the power and communication signals and divides them, uses the divided power to supply power to the control module, the control module shuts down the load module based on the power supply control, and executes corresponding actions according to the control signal.

[0060] It should be noted that in the case of losing the commercial power supply, the outdoor unit supplies power to the control module, and the control module controls to turn off the load module, so as to reduce the supply current required by the indoor unit on the basis of avoiding driving a large load, making the system in a low-power state, thereby maintaining the operation of the abnormal indoor unit through the power supply of the outdoor unit and improving the power supply quality.

[0061] Specifically, the load module further includes a power switch unit, a load unit, a current detection unit and a storage unit. The control module controls the load module to cut off the power supply, including: controlling the power switch unit to disconnect to disconnect the connection between the communication bus and the load unit, the current detection unit and the storage unit.

[0062] In addition, the control module includes an AC high-resistance unit, a communication unit, a power supply unit and a control unit. The indoor unit receives the power supply and communication signals and divides them, and uses the divided power supply to supply power to the control module. The control module controls to turn off the load module based on the power supply control and performs corresponding actions according to the control signal, including: the AC high-resistance unit receives the DC power supply and the control signal sent by the communication bus and divides them. The control signal is transmitted to the control unit through the communication unit, and the DC power supply supplies power to the control unit through the power supply unit; the control unit performs corresponding actions according to the parsed control signal based on the power supply of the power supply unit.

[0063] In another alternative embodiment, based on the bus voltage not being lower than the preset voltage threshold, the outdoor unit supplies power to the control module through the communication bus. The control module controls the load module to cut off the power supply, including: the outdoor unit loads a preset level and a control signal to the indoor unit through the communication bus; the indoor unit determines whether the preset level conforms to the preset protocol, and based on the preset level conforming to the preset protocol, controls to supply power to the control module. The control module controls to turn off the load module based on the power supply control and performs corresponding actions according to the control signal.

[0064] It should be noted that in the case of losing the commercial power supply, the outdoor unit controls to supply power to the control module, and the control module controls to turn off the load module, so as to reduce the supply current required by the indoor unit on the basis of avoiding driving a large load, making the system in a low-power state, thereby maintaining the operation of the abnormal indoor unit through the power supply of the outdoor unit and improving the power supply quality.

[0065] Specifically, the control module includes an AC high-resistance unit, a standby wake-up unit, a communication unit, and a control unit. The indoor unit determines whether the preset level conforms to the preset protocol, and based on the fact that the preset level conforms to the preset protocol, controls the power supply to the control module. The control module turns off the load module based on the power supply control and performs corresponding actions according to the control signal. The AC high-resistance unit receives the preset level and the control signal sent by the communication bus and splits them, sending the preset level to the standby wake-up unit and the control signal to the communication unit; wherein, the preset level is a level signal sent based on the preset protocol, and the preset protocol is used to define the sending frequencies of the high level and the low level; the standby wake-up unit controls whether the control unit is powered on according to the preset level; the communication unit analyzes the control signal and sends the analyzed control signal to the control unit; the control unit performs corresponding actions according to the analyzed control signal based on the power-on controlled by the standby wake-up unit.

[0066] In an alternative embodiment, the outdoor unit determines whether the bus voltage sent by the abnormal indoor unit received earlier is lower than the preset voltage threshold, and further includes: based on the bus voltage being lower than the preset voltage threshold, the outdoor unit determines the other indoor unit with the closest communication distance to the abnormal indoor unit according to the bus voltages sent by all indoor units earlier, and controls the other indoor unit with the closest communication distance to the abnormal indoor unit to supply power to the abnormal indoor unit, so as to supply power to the abnormal indoor unit with the closest communication distance through the communication bus, thereby enabling the abnormal indoor unit to resume normal operation and complete emergency operations, such as the electronic expansion valve returning to the specified position, key parameters being saved in time, etc., thereby improving the stability of the air-conditioning equipment.

[0067] Specifically, the outdoor unit includes an outdoor main control module and an outdoor communication module. Determining the other indoor unit with the closest communication distance to the abnormal indoor unit according to the bus voltages sent by all indoor units earlier includes: the outdoor main control module sorts the communication distances of each indoor unit according to the bus voltages of each indoor unit sent earlier by the indoor unit through the communication bus and the outdoor communication module, and according to the sorting result, determines the other indoor unit with the closest communication distance to the abnormal indoor unit, and generates a power supply control signal according to the determined other indoor unit with the closest communication distance to the abnormal indoor unit and sends it to the outdoor communication module; the outdoor communication module receives the power supply control signal sent by the outdoor main control module and sends the power supply control signal to the other indoor unit with the closest communication distance to the abnormal indoor unit; the other indoor unit with the closest communication distance to the abnormal indoor unit receives the power supply control signal and supplies power to the abnormal indoor unit according to the power supply control signal.

[0068] Further, when sorting the communication distances of each indoor unit, the larger the bus voltage, the closer the communication distance. Additionally, after sorting the communication distances of each indoor unit, it further includes: numbering each indoor unit according to the sorting result to obtain the indoor unit numbers.

[0069] In addition, the indoor unit includes an indoor main control module, an indoor communication module, and an indoor power supply switch module, which supplies power to the abnormal indoor unit according to the power supply control signal, including: the indoor communication module receives the power supply control signal sent by the outdoor unit and sends the received power supply control signal to the indoor main control module; the indoor main control module sends a switch control signal to the indoor power supply switch module based on the power supply control signal; the indoor power supply switch module receives the switch control signal and controls the connection with the communication bus according to the switch control signal to supply power to the abnormal indoor unit through the communication bus, so that the abnormal indoor unit can resume normal operation, and relevant emergency operations can still be completed when the mains power is lost, such as the electronic expansion valve returning to the specified position and key parameters being saved in time, thereby improving the stability of the air conditioning equipment and realizing the stable operation of the system.

[0070] It should be noted that the outdoor unit includes an outdoor main control module and an outdoor communication module; the outdoor main control module generates a power supply control signal based on each indoor unit number and the other indoor unit closest to the abnormal indoor unit in terms of communication distance, and sends the control signal to the outdoor communication module; the outdoor communication module transmits the power supply control signal to the indoor communication module of the other indoor unit closest to the abnormal indoor unit through the communication bus.

[0071] In an alternative embodiment, detecting whether the communication with each indoor unit is normal includes: loading a communication detection signal onto the communication bus, and if signals returned by each indoor unit based on detecting the communication detection signal on the communication bus are received, it is determined that the communication with the corresponding indoor unit is normal. It should be noted that when the indoor unit loses mains power, the outdoor unit cannot maintain normal communication with the corresponding indoor unit.

[0072] In an alternative embodiment, the indoor unit further includes an indoor main control module, an indoor communication module, and an indoor power supply switch module. After the outdoor unit controls the other indoor unit closest to the abnormal indoor unit in terms of communication distance to supply power to the abnormal indoor unit, it further includes: after the outdoor unit controls the other indoor unit closest to the abnormal indoor unit in terms of communication distance to supply power to the abnormal indoor unit, the indoor main control module of the abnormal indoor unit stores key parameters and controls the indoor communication module of the abnormal indoor unit to report information to the outdoor unit through the communication bus; the indoor main control module of the abnormal indoor unit controls the corresponding indoor communication module to return a response signal to the other indoor unit closest to the abnormal indoor unit in terms of communication distance through the communication bus; the indoor communication module of the other indoor unit closest to the abnormal indoor unit sends the received response signal to the corresponding indoor main control module to control the corresponding indoor power supply switch module to stop supplying power to the abnormal indoor unit; or, the indoor main control module of the abnormal indoor unit stores key parameters and controls the indoor communication module of the abnormal indoor unit to return a response signal and an information reporting signal to the other indoor unit closest to the abnormal indoor unit in terms of communication distance through the communication bus; the indoor communication module of the other indoor unit closest to the abnormal indoor unit sends the received response signal to the corresponding indoor main control module to control the corresponding indoor power supply switch module to stop supplying power to the abnormal indoor unit and control the corresponding indoor communication module to upload the received information reporting signal to the outdoor unit through the communication bus.

[0073] It should be noted that the indoor main control module of the abnormal indoor unit controls the indoor communication module to report information to the outdoor unit through the communication bus, so that the outdoor unit can know the abnormal situation of the abnormal indoor unit and facilitate determining whether to continue using the abnormal indoor unit subsequently. In addition, the indoor main control module of the abnormal indoor unit controls the indoor communication module to send a response signal to the indoor communication module of the other indoor unit closest in distance through the communication bus; the indoor communication module of the other indoor unit sends the response signal to the indoor main control module, and the indoor main control module controls the indoor power supply switch module to stop supplying power to the abnormal indoor unit according to the response signal, thereby maintaining the security of the communication bus.

[0074] In summary, in the embodiment of the present invention, the outdoor unit determines whether the bus voltage first sent by the abnormal indoor unit is lower than the preset voltage threshold to determine whether to directly supply power to the abnormal indoor unit by the outdoor unit, and controls the load module to disconnect through the indoor unit control module, so as to reduce the supply current required by the indoor unit on the basis of avoiding driving a large load, make the system in a low-power state, facilitate supplying power to the control module through the power supply module, maintain the operation of the abnormal indoor unit, and improve the power supply quality.

[0075] The present invention also provides an air conditioner including the power supply system as described in any one of the above.

[0076] Specifically, the air conditioner includes the power supply system as described above. When it is determined that the bus voltage returned by the abnormal indoor unit is not lower than the preset voltage threshold, the abnormal indoor unit is powered by using the power supply for the communication bus provided by the outdoor unit, or the power supply device for the standby wake-up circuit module in the abnormal indoor unit is controlled by a preset level to power the abnormal indoor unit, greatly improving the stability and reliability of the air conditioning equipment. While realizing indoor and outdoor communication, it can also control the power energy provided for the indoor unit. Or, when it is determined that the bus voltage returned by the abnormal indoor unit is lower than the preset voltage threshold, according to the bus voltage and in combination with the principle of nearby power supply, other indoor units closest to the power-off indoor unit are controlled to supply power to it, so as to dynamically control the indoor unit to provide emergency power nearby for the abnormal indoor unit on the basis of reducing the voltage loss on the communication bus, improving the power transmission efficiency and utilization rate. And because the current on the communication line is small, the amplitude of the communication signal will also be significantly increased, thereby improving the communication stability, greatly improving the stability and reliability of the air conditioning equipment, realizing intelligent, reasonable and energy-saving power supply, and improving the power usage efficiency.

[0077] Figure 6 An example of a schematic physical structure diagram of an electronic device is as Figure 6 shown. The electronic device may include: a processor 610, a communications interface 620, a memory 630, and a communication bus 640. Among them, the processor 610, the communications interface 620, and the memory 630 communicate with each other through the communication bus 640. The processor 610 can call the logical instructions in the memory 630 to execute the power supply method, which includes: the outdoor unit determines whether the bus voltage sent by the abnormal indoor unit received previously is lower than the preset voltage threshold; where the abnormal indoor unit represents the indoor unit that has lost the mains power supply, and the bus voltage is obtained by the indoor unit based on the detected power supply loaded on the communication bus; based on the bus voltage not being lower than the preset voltage threshold, the outdoor unit powers the control module through the communication bus, and the control module controls the load module to cut off the power.

[0078] In addition, when the logical instructions in the above-mentioned memory 630 are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks, or optical discs that can store program codes.

[0079] On the other hand, the present invention also provides a computer program product. The computer program product includes a computer program stored on a non-transitory computer-readable storage medium. The computer program includes program instructions. When the program instructions are executed by a computer, the computer can execute the power supply method provided by the above-mentioned various methods. The method includes: the outdoor unit determines whether the bus voltage sent by the abnormal indoor unit received earlier is lower than a preset voltage threshold; wherein, the abnormal indoor unit refers to an indoor unit that has lost the mains power, and the bus voltage is obtained by the indoor unit based on the detected power loaded on the communication bus; based on the bus voltage not being lower than the preset voltage threshold, the outdoor unit supplies power to the control module through the communication bus, and the control module controls the load module to cut off the power.

[0080] In yet another aspect, the present invention also provides a non-transitory computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, it is configured to execute the power supply method provided by the above-mentioned various methods. The method includes: the outdoor unit determines whether the bus voltage sent by the abnormal indoor unit received earlier is lower than a preset voltage threshold; wherein, the abnormal indoor unit refers to an indoor unit that has lost the mains power, and the bus voltage is obtained by the indoor unit based on the detected power loaded on the communication bus; based on the bus voltage not being lower than the preset voltage threshold, the outdoor unit supplies power to the control module through the communication bus, and the control module controls the load module to cut off the power.

[0081] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art can understand and implement it without creative efforts.

[0082] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on such an understanding, the essence of the above technical solution, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A power supply system, characterized in that, It includes a power supply module, a communication bus, and an indoor unit. The communication bus is connected to the indoor unit. The indoor unit includes a control module and a load module. The control module is electrically connected to the communication bus and the control module is also electrically connected to the load module; Based on the loss of commercial power by the indoor unit, the power supply module supplies power to the control module through the communication bus, and the control module controls the load module to cut off power.

2. The power supply system according to claim 1, characterized in that, The control module includes an AC high-resistance unit, a communication unit, a power supply unit, and a control unit, where: The AC high-resistance unit is respectively connected to the communication bus, the communication unit, and the power supply unit. The AC high-resistance unit receives and divides the DC power supply and control signal sent by the communication bus. The control signal is transmitted to the control unit through the communication unit, and the DC power supply supplies power to the control unit through the power supply unit; Based on the power supply of the power supply unit, the control unit performs corresponding actions according to the parsed control signal.

3. The power supply system according to claim 1, characterized in that, The control module includes an AC high-resistance unit, a standby wake-up unit, a communication unit, and a control unit, where: The AC high-resistance unit is respectively connected to the standby wake-up unit and the communication unit. The AC high-resistance unit receives and divides the preset level and control signal sent by the communication bus, sends the preset level to the standby wake-up unit, and sends the control signal to the communication unit; where the preset level is a level signal sent based on a preset protocol, and the preset protocol is used to define the sending frequencies of high and low levels; The standby wake-up unit controls whether the control unit is powered on according to the preset level; The communication unit parses the control signal and sends the parsed control signal to the control unit; based on the power-on controlled by the standby wake-up unit, the control unit performs corresponding actions according to the parsed control signal.

4. The power supply system according to claim 2 or 3, characterized in that, The load module further includes a power switch unit, a load unit, a current detection unit, and a storage unit. The power switch unit is respectively connected to the communication bus and the load unit. The load unit is respectively connected to the control unit and the current detection unit. The control unit is respectively connected to the current detection unit and the storage unit, where: In the case of loss of commercial power, the control unit disconnects the connections of the load unit, the current detection unit, and the storage unit by controlling the power switch unit, and stops supplying power to the load unit, the current detection unit, and the storage unit; In the case of restoration of commercial power, the control unit connects the communication bus, the load unit, the current detection unit, and the storage unit by controlling the power switch unit, and the power supply module supplies power to the load unit, the current detection unit, and the storage unit through the communication bus; The current detection unit detects whether the load unit is short-circuited based on the power supply, and the storage unit stores indoor unit data based on the power supply.

5. The power supply system according to claim 1, characterized in that The power supply module includes an outdoor unit, which is connected to the communication bus. The outdoor unit loads power and communication signals to the indoor unit through the communication bus, or the outdoor unit loads a preset level and control signals to the indoor unit through the communication bus; wherein, the preset level is a level signal sent based on a preset protocol, and the preset protocol is used to define the sending frequencies of the high level and the low level. Alternatively, the system includes at least two indoor units, which are connected in parallel. The power supply module is the other indoor unit that is closest to the abnormal indoor unit in terms of communication distance. The other indoor unit is connected to the communication bus and loads power and communication signals to the indoor unit through the communication bus.

6. A power supply method, characterized in that, Including the power supply system according to claim 5, the method includes: The outdoor unit determines whether the bus voltage sent by the abnormal indoor unit received previously is lower than a preset voltage threshold; wherein, the abnormal indoor unit refers to the indoor unit that has lost the mains power, and the bus voltage is the power obtained by the indoor unit based on the detection of the power loaded onto the communication bus. Based on the bus voltage not being lower than the preset voltage threshold, the outdoor unit powers the control module through the communication bus, and the control module controls the load module to cut off the power.

7. The power supply method according to claim 6, characterized in that, Based on the bus voltage not being lower than the preset voltage threshold, the outdoor unit powers the control module through the communication bus, and the control module controls the load module to cut off the power, including: The outdoor unit loads power and communication signals to the indoor unit through the communication bus. The indoor unit uses the power to power the control module. The control module turns off the load module based on the power supply control and performs corresponding actions according to the control signal; or The outdoor unit loads a preset level and control signals to the indoor unit through the communication bus. The indoor unit determines whether the preset level conforms to the preset protocol, and based on the preset level conforming to the preset protocol, controls to power the control module. The control module turns off the load module based on the power supply control and performs corresponding actions according to the control signal.

8. The power supply method according to claim 6, wherein The indoor unit includes a bus voltage detection module, an indoor communication module, and an indoor main control module. Before the outdoor unit determines whether the bus voltage sent by the abnormal indoor unit received previously is lower than the preset voltage threshold, it includes: Based on the unified power-on of the outdoor unit and the indoor unit, the outdoor unit controls to output power to the communication bus. The bus voltage detection module detects the voltage of the communication bus and transmits the detected bus voltage to the indoor main control module. The indoor main control module controls the indoor communication module to send a voltage communication signal to the communication bus according to the bus voltage, so as to transmit the detected bus voltage to the outdoor unit. The outdoor unit receives the voltage communication signal and controls to stop outputting power to the communication bus.

9. The power supply method according to claim 8, characterized in that, The outdoor unit includes an outdoor main control module and an outdoor power supply switch module. Based on the unified power-on of the outdoor unit and the indoor unit, the outdoor unit controls to output power to the communication bus, including: Based on the unified power - on of the outdoor unit and the indoor unit, the outdoor main control module sends a power - loading signal for loading power to the communication bus to the outdoor power - supply switch module; Based on receiving the power - loading signal, the outdoor power - supply switch module converts the commercial power into a DC power supply and loads the DC power supply onto the communication bus; The outdoor unit receives the voltage communication signal and controls to stop outputting power to the communication bus, including: The outdoor communication module receives the voltage communication signal through the communication bus and sends the voltage communication signal to the outdoor main control module; The outdoor main control module generates a stop - loading signal according to the voltage communication signal and sends the stop - loading signal to the outdoor power - supply switch module; The outdoor power - supply switch module stops loading the DC power supply onto the communication bus according to the stop - loading signal.

10. The power supply method according to claim 6, characterized in that, The outdoor unit determines whether the bus voltage sent by the abnormal indoor unit received previously is lower than a preset voltage threshold, and further includes: Based on the bus voltage being lower than the preset voltage threshold, the outdoor unit determines the other indoor unit with the closest communication distance to the abnormal indoor unit according to the bus voltages sent by all indoor units previously, and controls the other indoor unit with the closest communication distance to the abnormal indoor unit to supply power to the abnormal indoor unit.

11. The power supply method according to claim 9, characterized in that The indoor unit further includes an indoor main control module, an indoor communication module, and an indoor power - supply switch module. After the outdoor unit controls the other indoor unit with the closest communication distance to the abnormal indoor unit to supply power to the abnormal indoor unit, it further includes: After the outdoor unit controls the other indoor unit with the closest communication distance to the abnormal indoor unit to supply power to the abnormal indoor unit, the indoor main control module of the abnormal indoor unit stores key parameters and controls the indoor communication module of the abnormal indoor unit to report information to the outdoor unit through the communication bus; The indoor main control module of the abnormal indoor unit controls the corresponding indoor communication module to return a response signal to the other indoor unit with the closest communication distance to the abnormal indoor unit through the communication bus; The indoor communication module of the other indoor unit with the closest communication distance to the abnormal indoor unit sends the received response signal to the corresponding indoor main control module to control the corresponding indoor power - supply switch module to stop supplying power to the abnormal indoor unit; or, The indoor main control module of the abnormal indoor unit stores key parameters and controls the indoor communication module of the abnormal indoor unit to return a response signal and an information - reporting signal to the other indoor unit with the closest communication distance to the abnormal indoor unit through the communication bus; the indoor communication module of the other indoor unit with the closest communication distance to the abnormal indoor unit sends the received response signal to the corresponding indoor main control module to control the corresponding indoor power - supply switch module to stop supplying power to the abnormal indoor unit, and controls the corresponding indoor communication module to upload the received information - reporting signal to the outdoor unit through the communication bus.

12. An air conditioner, characterized in that, Including the power - supply system according to any one of claims 1 - 5.

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