Multi-connected air conditioning system

Abstract

An embodiment of the present application provides a multi-connected air conditioner system, which relates to the technical field of air conditioners and is used to improve the communication efficiency between the outdoor unit and the indoor units in the multi-connected air conditioner system. The air conditioner system includes: an outdoor unit; a plurality of indoor units, having a hierarchical topological structure, including N levels; each level includes a first indoor unit and a second indoor unit; the first indoor unit is used to communicate with the adjacent second indoor unit and also used to communicate with one indoor unit in the upper level of the level where it is located, and the first indoor unit of the first level is used to communicate with the outdoor unit; the second indoor unit is used to communicate with the adjacent indoor units; the first indoor unit summarizes the capacity requirement information and reports the requirement information to one indoor unit in the (N-1)th level; for the first indoor unit of the first level, the first indoor unit of the first level summarizes the capacity requirement information of the indoor units in the N levels and reports the requirement information of the indoor units in the N levels to the outdoor unit.

Description

Technical Field

[0001] This application relates to the technical field of air conditioners, and particularly to a multi-connected air conditioner system. Background Art

[0002] With the development of the economic society, air conditioners are increasingly widely used in various places such as entertainment, home, and work. When air conditioners are needed in multiple small areas in the same region, considering the saving of electric energy, a multi-connected air conditioner system composed of one outdoor unit and multiple indoor units is often used to control the room temperature of multiple regions.

[0003] The current topological structure adopted by the multi-connected air conditioner system has a large amount of communication data, resulting in data congestion and low communication efficiency between the outdoor unit and the indoor units. Summary of the Invention

[0004] This application provides a multi-connected air conditioner system for improving the communication efficiency between the outdoor unit and the indoor units in the multi-connected air conditioner system.

[0005] In order to achieve the above object, this application adopts the following technical solutions:

[0006] An embodiment of this application provides a multi-connected air conditioner system, which includes:

[0007] An outdoor unit;

[0008] Multiple indoor units, the multiple indoor units having a hierarchical topological structure, the topological structure including N levels, N being an integer greater than 1; each level of the N levels includes at least one first indoor unit and at least one second indoor unit; for each first indoor unit, the first indoor unit is used to communicate with a second indoor unit adjacent to the first indoor unit, and is also used to communicate with an indoor unit in the upper level of the level where the first indoor unit is located, wherein the first indoor unit of the first level of the N levels is used to communicate with the outdoor unit;

[0009] For each second indoor unit, the second indoor unit is used to communicate with an indoor unit adjacent to the second indoor unit;

[0010] For any first indoor unit of the Nth level, the first indoor unit is used to summarize its own capacity requirement information and the capacity requirement information of a second indoor unit adjacent to the first indoor unit, and report the summarized capacity requirement information to an indoor unit in the (N - 1)th level;

[0011] For the first indoor unit of the first level, the first indoor unit of the first level is used to summarize the capacity requirement information of the indoor units of the N levels, and report the summarized capacity requirement information of the indoor units of the N levels to the outdoor unit.

[0012] The technical solution of the embodiment of the present application at least brings the following beneficial effects: Aiming at the problem of low communication efficiency between the indoor unit and the outdoor unit of the current multi-connected air-conditioning system, the multi-connected air-conditioning system provided by the embodiment of the present application enables multiple indoor units to have a topological structure with N levels. Each level includes at least one first indoor unit and at least one second indoor unit. The second indoor unit can communicate with the indoor units adjacent to it, and the first indoor unit can communicate with the second indoor unit adjacent to it and can also communicate with an indoor unit in the upper level of the level where the first indoor unit is located.

[0013] For any first indoor unit in the Nth level, the first indoor unit aggregates its own capacity requirement information and the capacity requirement information of the second indoor unit adjacent to it, and reports the aggregated capacity requirement information to an indoor unit in the (N - 1)th level. It can be understood that after the capacity requirement information is aggregated and reported by one or more first indoor units in the Nth level, the indoor units in the (N - 1)th level have the capacity requirement information of the indoor units in the Nth level. Similarly, after reporting the capacity requirement information between levels multiple times, an indoor unit in the first level will have the capacity requirement information of some indoor units in N levels. After the first indoor unit in the first level aggregates the capacity requirement information of the indoor units in the first level, it will have the capacity requirement information of the indoor units in N levels. Then the first indoor unit in the first level reports the capacity requirement information of the indoor units in N levels to the outdoor unit. In this way, through one communication between the first indoor unit in the first level and the outdoor unit, the capacity requirement information of the indoor units in N levels can be reported to the outdoor unit, without each indoor unit reporting its own capacity requirement information to the outdoor unit separately, reducing the occurrence of data congestion and improving the communication efficiency between the indoor unit and the outdoor unit in the multi-connected air-conditioning system.

[0014] In some embodiments, for any first indoor unit in the Nth level, the first indoor unit is also used to store the capacity requirement information of the second indoor unit adjacent to it; for the first indoor unit in the first level, the first indoor unit in the first level is also used to store the aggregated capacity requirement information of the indoor units in N levels.

[0015] In some embodiments, the outdoor unit is used to receive the aggregated capacity requirement information of the indoor units in N levels reported by the first indoor unit in the first level.

[0016] In some embodiments, the outdoor unit includes a compressor, an expansion valve and an outdoor fan; wherein, the expansion valve is used to adjust the refrigerant flow rate transmitted by the outdoor unit to multiple indoor units; the outdoor unit is also used to determine its own target operating parameters according to the aggregated capacity requirement information of the indoor units in N levels; the target operating parameters include the operating power of the compressor, the opening degree of the expansion valve and the air volume of the outdoor fan; the outdoor unit is also used to work according to the target operating parameters.

[0017] In some embodiments, after the outdoor unit operates according to the target operating parameters, the outdoor unit is further configured to distribute refrigerant flow rates for the N indoor units according to the aggregated capacity demand information of the N levels of indoor units.

[0018] In some embodiments, the capacity demand information includes refrigerant demand.

[0019] In some embodiments, for any one of the multiple indoor units, the indoor unit is configured to send the operating data of the indoor unit to the indoor unit adjacent to the indoor unit, and receive the operating data of the adjacent indoor unit sent by the indoor unit adjacent to the indoor unit. The operating data includes at least one of refrigerant flow rate, set air outlet temperature, actual air outlet temperature, air outlet angle, and air volume.

[0020] In some embodiments, after the indoor unit receives the operating data of the adjacent indoor unit sent by the indoor unit adjacent to the indoor unit, the indoor unit is further configured to perform fault diagnosis on the adjacent indoor unit according to the operating data of the adjacent indoor unit, and send the fault diagnosis result to the adjacent indoor unit.

[0021] In some embodiments, after the indoor unit determines that the indoor unit adjacent to the indoor unit is a faulty indoor unit, the indoor unit is further configured to adjust its own operating parameters according to the location of the faulty indoor unit to increase the heating or cooling capacity of the area where the faulty indoor unit is located; wherein, the operating parameters include air volume, refrigerant flow rate, and air outlet angle.

[0022] In some embodiments, after the indoor unit receives the operating data of the adjacent indoor unit sent by the indoor unit adjacent to the indoor unit, the indoor unit is further configured to compare the operating data of the adjacent indoor unit with its own operating data and adjust its own operating parameters. Description of the Drawings

[0023] The drawings are used to provide a further understanding of the technical solutions of the present application, and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solutions of the present application and do not constitute a limitation to the technical solutions of the present application.

[0024] Figure 1 It is a schematic topological structure diagram of an existing multi-connected air conditioner system provided by an embodiment of the present application;

[0025] Figure 2 It is a schematic structural diagram of a multi-connected air conditioner system provided by an embodiment of the present application;

[0026] Figure 3 It is a schematic structural diagram of a controller provided by an embodiment of the present application;

[0027] Figure 4Schematic diagram of the topological structure of a multi-connected air-conditioning system provided by an embodiment of the present application;

[0028] Figure 5 Hardware configuration block diagram of a multi-connected air-conditioning system provided by an embodiment of the present application;

[0029] Figure 6 Schematic diagram of the structure of a smart home system provided by an embodiment of the present application;

[0030] Figure 7 Schematic diagram of the step flow of a multi-connected air-conditioning system provided by an embodiment of the present application;

[0031] Figure 8 Schematic diagram of the step flow of another multi-connected air-conditioning system provided by an embodiment of the present application;

[0032] Figure 9 Schematic diagram of the step flow of another multi-connected air-conditioning system provided by an embodiment of the present application;

[0033] Figure 10 Schematic diagram of the overall step flow of a multi-connected air-conditioning system provided by an embodiment of the present application. Detailed implementation manners

[0034] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0035] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present application are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0036] The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise stated, the meaning of "a plurality" is two or more.

[0037] In the description of this application, it should be noted that unless otherwise clearly specified and defined, the terms "connected" and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances. In addition, when describing pipelines, the terms "connected" and "coupled" used in this application have the meaning of conducting. The specific meaning needs to be understood in combination with the context.

[0038] In the embodiments of this application, words such as "exemplary" or "for example" are used to represent examples, illustrations, or explanations. Any embodiment or design solution described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Rather, the use of words such as "exemplary" or "for example" is intended to present relevant concepts in a specific manner.

[0039] For ease of understanding, first, a brief introduction and explanation of some terms or basic concepts of technologies related to the embodiments of the present invention are given.

[0040] Refrigerant: A substance that easily absorbs heat and turns into a gas, and easily releases heat and turns into a liquid. In an air-conditioning system, heat energy is transferred through the evaporation and condensation of the refrigerant to produce a refrigeration effect.

[0041] Currently, multi-split air-conditioning systems generally adopt a centralized control topology structure. As Figure 1 shown, ID1, ID2, ID3, ID4, ID5, and ID6 are multiple indoor units in a multi-split air-conditioning system, and OD is the outdoor unit in the multi-split air-conditioning system. All indoor units are connected to the outdoor unit and are controlled by the outdoor unit. There is no information interaction between indoor units. The outdoor unit needs to process all the information sent by indoor units through a bus. The amount of information on the bus is large, which easily leads to data congestion, causing a large communication delay, resulting in a low communication efficiency between indoor units and the outdoor unit, affecting the operation effect of the multi-split air-conditioning system and the user experience.

[0042] Aiming at the problem of low communication efficiency between indoor units and the outdoor unit in the current multi-split air-conditioning system, the multi-split air-conditioning system provided in the embodiments of this application enables multiple indoor units to have a topological structure with N levels. Each level includes at least one first indoor unit and at least one second indoor unit. The second indoor unit is used to communicate with the indoor unit adjacent to it, and the first indoor unit is used to communicate with the second indoor unit adjacent to it, and can also communicate with an indoor unit in the upper level of the level where the first indoor unit is located.

[0043] For any first indoor unit at the Nth level, the first indoor unit aggregates its own capacity requirement information and the capacity requirement information of the second indoor unit adjacent to it, and reports the aggregated capacity requirement information to an indoor unit at the (N-1)th level. It can be understood that after the capacity requirement information is aggregated and reported by one or more first indoor units at the Nth level, the indoor units at the (N-1)th level already have the capacity requirement information of the indoor units at the Nth level. Similarly, after reporting the capacity requirement information between multiple levels for many times, the indoor units at the first level will have the capacity requirement information of the indoor units at N levels. After the first indoor unit at the first level aggregates the capacity requirement information of the first level, it will have the capacity requirement information of the indoor units at N levels. In this way, through one communication between the first indoor unit at the first level and the outdoor unit, the capacity requirement information of the indoor units at N levels can be reported to the outdoor unit, improving the communication efficiency between the indoor units and the outdoor unit of the multi-connected air conditioner system.

[0044] A multi-connected air conditioner system provided by an embodiment of the present application will be described below with reference to the accompanying drawings.

[0045] Figure 2 The structure diagram of a multi-connected air conditioner system provided by the present application according to an exemplary embodiment is shown in Figure 2 As shown, the multi-connected air conditioner system 10 includes an outdoor unit 11, an indoor unit 12, and a controller 50 (not shown in the figure).

[0046] In some embodiments, the outdoor unit 11 includes: a compressor 111, an outdoor heat exchanger 112, a liquid receiver 113, a four-way valve 114, a plurality of expansion valves 115, and an outdoor fan 116.

[0047] In some embodiments, the compressor 111 is used to compress the low-temperature and low-pressure refrigerant gas into a high-temperature and high-pressure refrigerant gas and discharge it to the condenser. The compressor 111 can be a variable-capacity inverter compressor that performs speed control based on an inverter.

[0048] In some embodiments, the controller 50 can obtain the operating frequency of the compressor 111 at each moment and the working current value at each moment.

[0049] In some embodiments, one end of the outdoor heat exchanger 112 is connected to the accumulator 113 through a four-way valve 114, and the other end is connected to an expansion valve 115. The outdoor heat exchanger 112 has a first inlet / outlet for allowing the refrigerant to flow between the outdoor heat exchanger 112 and the suction port of the compressor 111 via the accumulator 113, and has a second inlet / outlet for allowing the refrigerant to flow between the outdoor heat exchanger 112 and the expansion valve 115. The outdoor heat exchanger 112 exchanges heat between the refrigerant flowing in the heat transfer tubes connected between the first inlet / outlet and the second inlet / outlet and the outdoor air. In the refrigeration cycle, the outdoor heat exchanger 112 operates as a condenser.

[0050] In some embodiments, one end of the accumulator 113 is connected to the compressor 111, and the other end is connected to the outdoor heat exchanger 112 through the four-way valve 114. In the accumulator 113, the refrigerant flowing from the outdoor heat exchanger 112 to the compressor 111 via the four-way valve 114 is separated into a gaseous refrigerant and a liquid refrigerant. And mainly gaseous refrigerant is supplied from the accumulator 113 to the suction port of the compressor 111.

[0051] In some embodiments, the four ports of the four-way valve 114 are respectively connected to the compressor 111, the outdoor heat exchanger 112, the accumulator 113, and the expansion valve 115. The four-way valve 114 is used to realize the mutual conversion between refrigeration and heating by changing the flow direction of the refrigerant in the system pipeline.

[0052] In some embodiments, the expansion valve 115 is composed of a valve body and a coil, and has the function of expanding and decompressing the refrigerant flowing through the expansion valve 115, and can be used to adjust the refrigerant flow rate transmitted from the outdoor unit to the indoor unit. If the opening degree of the expansion valve 115 is reduced, the flow path resistance of the refrigerant passing through the expansion valve 115 increases. If the opening degree of the expansion valve 115 is increased, the flow path resistance of the refrigerant passing through the expansion valve 115 decreases. Thus, even if the states of other devices in the circuit do not change, when the opening degree of the expansion valve 115 changes, the refrigerant flow rate flowing to the indoor unit 12 also changes.

[0053] In some embodiments, each of the plurality of expansion valves 115 corresponds to an indoor unit 12, and the expansion valve 115 can be an electronic expansion valve.

[0054] Taking the indoor unit 12 as an example of an indoor wall-mounted unit, the indoor wall-mounted unit is usually installed on an indoor wall surface or the like. Again, an indoor cabinet unit is also a form of the indoor unit.

[0055] In some embodiments, the indoor unit 12 includes an indoor heat exchanger 121, an indoor fan 122, a baffle 123, and a communicator 124.

[0056] In some embodiments, the indoor heat exchanger 121 has a third inlet / outlet for the liquid refrigerant to flow between the expansion valve 115, and a fourth inlet / outlet for the gaseous refrigerant to flow between the discharge port of the compressor 111. The indoor heat exchanger 121 exchanges heat between the refrigerant flowing in the heat transfer pipe connected between the third inlet / outlet and the fourth inlet / outlet and the indoor air.

[0057] In some embodiments, the indoor fan 122 generates an air flow of the indoor air passing through the outdoor heat exchanger 121 to promote the heat exchange between the refrigerant flowing in the heat transfer pipe between the third inlet / outlet and the fourth inlet / outlet and the indoor air.

[0058] In some embodiments, the indoor fan 122 can adjust the fan speed to regulate the air volume output of the indoor unit 12.

[0059] In some embodiments, the baffle 123 includes a horizontal baffle and a vertical baffle for adjusting the air outlet angle of the indoor unit 12.

[0060] In some embodiments, the communicator 124 is used for communication connection with other indoor units 12.

[0061] In some embodiments, the controller 50 refers to a device that can generate operation control signals according to the instruction operation code and timing signals to instruct the multi-connected air-conditioning system to execute control instructions. Exemplarily, the controller can be a central processing unit (CPU), a general-purpose processor, a network processor (NP), a digital signal processor (DSP), a microprocessor, a microcontroller, a programmable logic device (PLD), or any combination thereof. The controller can also be other devices with processing functions, such as circuits, devices, or software modules, and the embodiments of the present application do not impose any restrictions thereon.

[0062] In addition, the controller 50 can be used to control the operation of each component inside the multi-connected air-conditioning system 10 so that each component of the multi-connected air-conditioning system 10 operates to realize the various predetermined functions of the multi-connected air-conditioning system.

[0063] In some embodiments, the multi-connected air-conditioning system 10 is also attached with a remote controller, which has a function of communicating with the controller 50, for example, using infrared rays or other communication methods. The remote controller is used for various controls of the multi-connected air-conditioning system by the user to realize the interaction between the user and the multi-connected air-conditioning system 10.

[0064] Figure 3 The structural schematic diagram of a controller provided by the embodiments of the present application. AsFigure 3 As shown, the controller 50 includes an outdoor control module 501 and an indoor control module 502. The outdoor control module 501 includes a first memory 5011, and the indoor control module 502 includes a second memory 5021. The indoor control module 502 is connected to the outdoor control module 501 in a wired or wireless communication form. The outdoor control module 501 can be installed in the outdoor unit 11 or can be independent of the outdoor unit 11, and is used to control the outdoor unit 11 to perform related operations. The indoor control module 502 can be installed in the indoor unit 12 or can be independent of the indoor unit 12. It should be understood that the above module division is only a functional division, and the outdoor control module 501 and the indoor control module 502 can also be integrated into one module. The first memory 5011 and the second memory 5021 can also be integrated into one memory.

[0065] In some embodiments, the first memory 5011 is used to store application programs and data related to the outdoor unit 11. The outdoor control module 501 executes various functions and data processing of the multi-connected air-conditioning system by running the application programs and data stored in the first memory 5011. The first memory 5011 mainly includes a program storage area and a data storage area. Among them, the program storage area can store an operating system and application programs required for at least one function (such as the outdoor unit fan turning-on function, the outdoor temperature measurement function, etc.); the data storage area can store data created according to the use of the multi-connected air-conditioning system (such as outdoor temperature, the opening degree of each electronic expansion valve, etc.). In addition, the first memory 5011 can include a high-speed random access memory and can also include a non-volatile memory, such as a disk storage device, a flash memory device, or other volatile solid-state storage devices, etc.

[0066] In some embodiments, the second memory 5021 is used to store application programs and data related to multiple indoor units 12 and multiple expansion valves 115. The indoor control module 502 executes various functions and data processing of the multi-connected air-conditioning system by running the application programs and data stored in the memory 5021. The second memory 5021 mainly includes a program storage area and a data storage area. Among them, the program storage area can store an operating system and application programs required for at least one function (such as the indoor temperature measurement function); the data storage area can store data created according to the use of the multi-connected air-conditioning system (such as indoor temperature, etc.). In some examples, the second memory 5021 is also used to store the correspondence between the addresses of the indoor units 12 and the addresses of the expansion valves 115.

[0067] In some embodiments, there is a communication connection between the outdoor control module 501 and the outdoor unit 11, which is used to control the outdoor unit to perform related operations according to user instructions or system default instructions. Optionally, the outdoor control module 501 can control the rotation speed of the outdoor fan according to the air conditioner operation mode selected by the user. Optionally, the outdoor control module 501 can also obtain the outdoor temperature according to user instructions or system instructions, and store the obtained outdoor temperature in the first memory 5011. Optionally, the outdoor control module 501 can also control the rotation of the four-way valve 114 in the outdoor unit 11 according to the air conditioner operation mode selected by the user to achieve the selection of the cooling or heating mode. Optionally, the outdoor control module 501 can also control the operation mode, compressor frequency, etc. of the outdoor unit 11 during the address correction process.

[0068] In some embodiments, there is a communication connection between the indoor control module 502 and the indoor unit 12, which is used to control the indoor unit 12 to perform related operations according to user instructions or system default instructions. For example, the indoor control module 502 can also control the indoor unit to turn on the indoor temperature sensor according to user instructions to detect the indoor temperature.

[0069] In some embodiments, there is a communication connection between the indoor control module 502 and multiple expansion valves 115, which is used to control the multiple expansion valves 115 to perform related operations according to user instructions or system default instructions. Optionally, the indoor control module 502 can also control the opening degree of each expansion valve 115 according to user instructions or system instructions.

[0070] Figure 4 This is a schematic diagram of the topology structure of a multi-connected air conditioner system provided by this application according to an exemplary embodiment.

[0071] As Figure 4 shown, ID represents the indoor unit in the multi-connected air conditioner system, and OD represents the outdoor unit in the multi-connected air conditioner system.

[0072] In some embodiments, as Figure 4 shown, the multi-connected air conditioner system has multiple outdoor units.

[0073] In some embodiments, any one of the multiple outdoor units of the multi-connected air conditioner system has a communication connection with the adjacent outdoor unit.

[0074] In some embodiments, as Figure 4 shown, the multiple indoor units of the multi-connected air conditioner system have a hierarchical topology structure, the topology structure includes N levels, N is an integer greater than 1; each level in the N levels includes at least one first indoor unit and at least one second indoor unit.

[0075] As Figure 4As shown, the multi-connected air-conditioning system includes multiple indoor units, and adjacent indoor units are all communicatively connected. Among them, indoor unit ID1 in area 7 can be understood as an indoor unit on the first floor, ID2 can be understood as an indoor unit on the second floor, ID3 can be understood as an indoor unit on the third floor, and ID4 can be understood as an indoor unit on the fourth floor. ID1 in area 5 can be understood as an indoor unit in room 0 on the first floor, ID1-1 can be understood as an indoor unit in room 1 on the first floor, and ID1-2 can be understood as an indoor unit in room 2 on the first floor. ID1-1, ID1-1-1, ID1-1-2, and ID1-1-3 in area 1 can be understood as indoor units at different positions in room 0.

[0076] Among them, area 7 forms the first level. ID1 can be the first indoor unit of the first level, and ID2, ID3, and ID4 are the second indoor units of the first level. Areas 5 and 6 form the second level. Among them, ID1 and ID2 are the first indoor units of the second level, and ID1-1, ID1-2, ID2-1, and ID2-2 are the second indoor units of the second level. The indoor units in areas 1, 2, 3, and 4 form the third level. Among them, ID1-1, ID1-2, ID2-1, and ID2-2 are the first indoor units of the third level.

[0077] Figure 5 This is a hardware configuration block diagram of a multi-connected air-conditioning system provided by the present application according to an exemplary embodiment. As Figure 5 shown, the multi-connected air-conditioning system 10 further includes one or more of the following: a first temperature sensor 101 and a second temperature sensor 102.

[0078] In some embodiments, the first temperature sensor 101 is disposed at the air outlet of the indoor unit to detect the actual air outlet temperature of the indoor unit and send the detected actual air outlet temperature to the controller 50.

[0079] In some embodiments, the first temperature sensor 102 is disposed inside the indoor unit to detect the temperature value of the environment where the indoor unit is located and send the detected temperature value of the environment where the indoor unit is located to the controller 50.

[0080] In some embodiments, the multi-connected air-conditioning system can form a smart home system with a cloud server and a terminal device. Figure 6 As shown is a schematic structural diagram of the smart home system provided by an embodiment of the present application. As Figure 6 shown, the smart home system includes an air-conditioning system 10, a cloud server 20, and a terminal device 30.

[0081] Among them, the cloud server 20 can be a single server, or alternatively, it can also be a server cluster composed of multiple servers. In some embodiments, the server cluster can also be a distributed cluster. The present application does not limit the specific form of the server 20.

[0082] In some embodiments, the air conditioning system 10 can also send its own operation data to the cloud server 20, so that the cloud server 20 calculates the operation parameters of each component of the air conditioning system 10 during the working process according to the operation data of the air conditioning system 10, and then sends the calculated operation parameters to the air conditioning system 10. Furthermore, it controls each component in the air conditioning system 10 to work according to the operation parameters calculated by the cloud server 20.

[0083] The terminal device 30 is used to send a control command to the air conditioning system 10 and receive feedback information in the air conditioning system 10. Exemplarily, the terminal device 30 in the embodiments of the present application can be a mobile phone, a tablet computer, a desktop computer, a laptop computer, a handheld computer, a notebook computer, an ultra-mobile personal computer (UMPC), a netbook, as well as a cellular phone, a personal digital assistant (PDA), an augmented reality (AR) / virtual reality (VR) device, etc. The present application does not particularly limit the specific form of the terminal device 30. It can perform human-computer interaction with the user through one or more of a keyboard, a touchpad, a touch screen, a remote control, voice interaction, or a handwriting device. Taking the terminal device 30 as a mobile phone as an example, the user can use the mobile phone to send a control command to the air conditioning system 10.

[0084] Those skilled in the art can understand that Figure 5 the hardware structure shown in does not constitute a limitation on the multi-split air conditioning system. The multi-split air conditioning system may include more or fewer components than shown in the figure, or combine certain components, or have different component arrangements.

[0085] Next, in combination with Figure 4 the topological structure shown, a multi-split air conditioning system provided by the embodiments of the present application will be specifically introduced.

[0086] In some embodiments, a multi-split air conditioning system provided by the embodiments of the present application has a process of reporting capacity requirement information. As Figure 7 shown, the process of reporting capacity requirement information includes the following steps:

[0087] S101. Any first indoor unit at the Nth level aggregates its own capacity requirement information and the capacity requirement information of the second indoor unit adjacent to the first indoor unit.

[0088] It is understandable that when an indoor unit needs to perform cooling or heating, it needs to send its own capacity requirement information to the outdoor unit so that the outdoor unit can cooperate with the indoor unit according to the capacity requirement information of the indoor unit to complete cooling or heating.

[0089] In some embodiments, the capacity requirement information includes the refrigerant demand.

[0090] In some embodiments, an indoor unit can calculate its own capacity requirement information according to its own capacity, set temperature and actual temperature.

[0091] In some embodiments, any first indoor unit of the Nth level has a communication connection with an adjacent second indoor unit. The second indoor unit can send its own capacity requirement information to the first indoor unit, and the first indoor unit can summarize the capacity requirement information of one or more second indoor units adjacent to the first indoor unit with the capacity requirement information of the first indoor unit itself.

[0092] In some embodiments, each second indoor unit has a communication connection with the indoor unit adjacent to it and can send its own capacity requirement information to the adjacent indoor unit. The adjacent indoor unit can be a second indoor unit or a first indoor unit.

[0093] In some embodiments, the capacity requirement information sent by a second indoor unit to a first indoor unit can include not only the capacity requirement information of the second indoor unit itself, but also the capacity requirement information of the indoor unit adjacent to the second indoor unit.

[0094] Exemplarily, as Figure 4 shown in the topological structure, the capacity requirement information reported by ID1-1-1 to ID1-1 can include not only the capacity requirement information of ID1-1-1 itself, but also the capacity requirement information of ID1-1-2 adjacent to ID1-1-1.

[0095] It is understandable that when the first indoor unit summarizes its own capacity requirement information with the capacity requirement information of the adjacent second indoor unit, the first indoor unit has summarized the capacity requirement information of all indoor units that have a direct communication connection or an indirect communication connection with the first indoor unit.

[0096] In some embodiments, each indoor unit has a memory and can store the capacity requirement information in the memory.

[0097] Exemplarily, the first indoor unit of the first level has a memory and can be used to store the capacity requirement information of the indoor units of N levels after summarization.

[0098] In some embodiments, for each of the N levels, a first indoor unit in one level can simultaneously serve as the first indoor unit or the second indoor unit of the previous level of that level.

[0099] Exemplarily, as Figure 4 shown in the topological structure, ID1-1 can serve as the first indoor unit in area 1 of the third level or the second indoor unit in area 5 of the second level.

[0100] Exemplarily, taking Figure 4 area 1 of the topological structure shown as an example, area 1 includes four indoor units, namely ID1-1, ID1-1-1, ID1-1-2, and ID1-1-3. Any one of the four indoor units has a communication connection with the adjacent indoor unit. Among them, ID1-1 can serve as the first indoor unit, and ID1-1-2 and ID1-1-3 can serve as the second indoor units. ID1-1-1 and ID1-1-3 are both adjacent to ID1-1-2. ID1-1-2 can report its own capacity requirement information to ID1-1-1 or ID1-1-3 through the communication connection. The capacity requirement information of ID1-1-1 not only includes its own capacity requirement information but also includes the capacity requirement information of ID1-1-2. When ID1-1-1 reports the capacity requirement information to ID1-1, it has already reported the capacity requirement information of ID1-1-2 to ID1-1. It can be understood that ID1-1 has the capacity requirement information of the four indoor units ID1-1, ID1-1-1, ID1-1-2, and ID1-1-3, that is, ID1-1 has completed the aggregation of the capacity requirement information of the four indoor units ID1-1, ID1-1-1, ID1-1-2, and ID1-1-3. Similarly, ID1-2, ID2-1, ID2-2, ID1, and ID2 will all aggregate the capacity requirement information of the adjacent second indoor units as the first indoor unit.

[0101] S102. Report the aggregated capacity requirement information to an indoor unit in the (N - 1)th level.

[0102] In some embodiments, after the first indoor unit in the Nth level aggregates its own capacity requirement information and the capacity requirement information of the second indoor units adjacent to this first indoor unit, since any first indoor unit in the Nth level communicates with an indoor unit in the (N - 1)th level, a first indoor unit in the first level can report the aggregated capacity requirement information to an indoor unit in the (N - 1)th level.

[0103] Report the capacity requirement information of multiple indoor units in the Nth layer, and store the capacity requirement information of multiple indoor units in the Nth layer in the storage of the indoor unit in the (N-1)th layer. It can be understood that the capacity requirement information of the indoor unit in the (N-1)th layer includes not only its own capacity requirement information, but also the capacity requirement information of multiple indoor units in the Nth layer.

[0104] Exemplarily, in combination with Figure 4 the topology shown, ID1, ID1-1, and ID1-2 are indoor units in Area 5, where ID1 is the first indoor unit in Area 5, ID1-1 is the second indoor unit in Area 5, and at the same time, ID1-1 is also the first indoor unit in Area 1. After ID1-1, as the first indoor unit in Area 1, summarizes the capacity requirement information of multiple indoor units in Area 1, it communicates with the indoor unit ID1 to report the summarized capacity requirement information to the second layer.

[0105] In some embodiments, the summarization process is the reporting process. Since ID1-1 is a first indoor unit in the third layer and is also the second indoor unit in the second layer, that is, the summarization process of ID1-1 is the process of a first indoor unit in the third layer reporting to an indoor unit in the second layer.

[0106] In some embodiments, when ID1-1 is a second indoor unit in the second layer, ID1-1 reports the capacity requirement information of four indoor units, etc. to the first indoor unit ID1 in the second layer.

[0107] S103. The first indoor unit in the first layer summarizes the capacity requirement information of the indoor units in N layers.

[0108] It can be understood that after one or more first indoor units in the Nth layer summarize the capacity requirements adjacent to the first indoor unit and report them to an indoor unit in the (N-1)th layer, the capacity requirement information of the indoor unit in the (N-1)th layer includes the capacity requirement information of all indoor units in the Nth layer. After being summarized and reported by the first indoor unit in each layer, the capacity requirement information of all indoor units will finally be summarized in the capacity requirement information of the indoor unit in the first layer. For the first indoor unit in the first layer, summarizing the capacity requirement information of the indoor units in the first layer is summarizing the capacity requirement information of the indoor units in N layers.

[0109] Exemplarily, in combination with Figure 4In the shown topology, after ID1-1 reports the aggregated capacity requirement information to ID1, ID1 has the capacity requirement information of all the indoor units in Area 1, Area 2, and Area 5. Similarly, ID2 has the capacity requirement information of all the indoor units in Area 3, Area 4, and Area 6. After the first indoor unit ID1 at the first level aggregates the capacity requirement information of all the indoor units at the first level, it has the capacity requirement information of all the indoor units at the first level, that is, ID1 has the capacity requirement information of ID2, ID3, and ID4 as well as its own, that is, it has the capacity requirement information of all the indoor units in Area 7. Moreover, ID1 has the capacity requirement information of all the indoor units in Area 1, Area 2, and Area 5, and ID2 has the capacity requirement information of all the indoor units in Area 3, Area 4, and Area 6. Therefore, ID1 has the capacity requirement information of all the indoor units at three levels.

[0110] S104. Report the aggregated capacity requirement information of the indoor units at N levels to the outdoor unit.

[0111] In some embodiments, since the first indoor unit at the first level is connected to the outdoor unit, after aggregating the capacity requirement information of the indoor units at N levels, the first indoor unit at the first level can report the aggregated capacity requirement information of the indoor units at N levels to the outdoor unit.

[0112] Exemplarily, in combination with Figure 4 the shown topology, ID1 reports the aggregated capacity requirement information of the indoor units at N levels to the outdoor unit OD1.

[0113] The technical solution of the embodiment of the present application has at least the following beneficial effects: Aiming at the problem of low communication efficiency between the indoor units and the outdoor unit in the current multi-connected air-conditioning system, the multi-connected air-conditioning system provided by the embodiment of the present application enables multiple indoor units to have a topology structure of N levels. Each level includes at least one first indoor unit and at least one second indoor unit. The second indoor unit can communicate with the indoor unit adjacent to it, and the first indoor unit can communicate with the second indoor unit adjacent to it and can also communicate with an indoor unit in the upper level of the level where the first indoor unit is located.

[0114] For any first indoor unit at the Nth level, the first indoor unit aggregates its own capacity demand information and the capacity demand information of the second indoor unit adjacent to it, and reports the aggregated capacity demand information to an indoor unit at the (N - 1)th level. It can be understood that after the capacity demand information is aggregated and reported by one or more first indoor units at the Nth level, the indoor unit at the (N - 1)th level has the capacity demand information of the indoor units at the Nth level. Similarly, after reporting the capacity demand information between multiple levels, a first indoor unit at the first level will have the capacity demand information of some of the indoor units in N levels. After aggregating the capacity demand information of the first level, the first indoor unit at the first level will have the capacity demand information of the indoor units in N levels. Then, the first indoor unit at the first level reports the capacity demand information of the indoor units in N levels to the outdoor unit. In this way, through one communication between the first indoor unit at the first level and the outdoor unit, the capacity demand information of the indoor units in N levels can be reported to the outdoor unit, without each indoor unit reporting its own capacity demand information to the outdoor unit separately, reducing the occurrence of data congestion and improving communication efficiency.

[0115] In some embodiments, a multi-connected air conditioner system provided by the embodiments of the present application also involves the process of refrigerant distribution, such as Figure 8 shown, the refrigerant distribution process includes the following steps:

[0116] S201. The outdoor unit determines its own target operating parameters according to the aggregated capacity demand information of the indoor units in N levels.

[0117] In some embodiments, after the outdoor unit receives the aggregated capacity demand information of the indoor units in N levels reported by the first indoor unit at the first level, the outdoor unit can determine its own target operating parameters according to the aggregated capacity demand information of the indoor units in N levels.

[0118] Among them, the target operating parameters include: the operating power of the compressor, the opening degree of the expansion valve, and the air volume of the outdoor fan.

[0119] From the above description of the capacity demand information, it can be seen that the capacity demand information includes the refrigerant demand. That is, the outdoor unit determines operating parameters such as the operating power of the compressor, the opening degree of the expansion valve, and the air volume of the outdoor unit according to the aggregated refrigerant demands of the indoor units in N levels.

[0120] S202. Operate according to the target operating parameters.

[0121] In some embodiments, after the outdoor unit determines the target operating parameters according to the capacity demand information of the indoor units in N levels, it operates according to the target operating parameters.

[0122] Exemplarily, when the user needs to use a multi-connected air conditioner system, the user can send a control instruction to the multi-connected air conditioner, and the control instruction is used to set the temperature and the operating mode. After receiving the control instruction sent by the user, in response to the control instruction, each of the multiple indoor units in the multi-connected air conditioner system calculates its own capacity requirement information according to its own capacity, the set temperature, and the actual temperature of the environment where the indoor unit is located. Finally, the capacity requirement information is summarized in the first indoor unit of the first layer, and the first indoor unit of the first layer reports the capacity requirement information of the indoor units of N layers to the outdoor unit. The outdoor unit determines the compressor operating power of the outdoor unit, the opening degree of the expansion valve, and the air volume of the outdoor unit fan according to the capacity requirement information of the indoor units of N layers, so as to ensure that the refrigerant flow rate of the outdoor unit can meet the refrigerant demand of all indoor units.

[0123] S203. According to the summarized capacity requirement information of the indoor units of N layers, allocate the refrigerant flow rate for the indoor units of N layers.

[0124] In some embodiments, after the outdoor unit operates according to the target operating parameters, the outdoor unit can allocate the refrigerant flow rate for the indoor units of N layers according to the summarized capacity requirement information of the indoor units of N layers.

[0125] Optionally, the outdoor unit can adjust the opening degree of the expansion valve according to the summarized capacity requirement information of the indoor units of N layers, so as to realize the allocation of the refrigerant flow rate for the indoor units of N layers.

[0126] Based on Figure 8 The embodiments shown at least bring the following beneficial effects: determining the target operating parameters of the outdoor unit according to the capacity requirement information of the indoor unit and allocating the refrigerant flow rate can make the refrigerant flow rate be allocated as needed, avoid the waste of the refrigerant, improve the use efficiency of the refrigerant, and enhance the intelligent level of the multi-connected air conditioner system.

[0127] In some embodiments, for each of the multiple indoor units in the multi-connected air conditioner system, each indoor unit can also perform fault diagnosis. As Figure 9 shown, the fault diagnosis process includes the following steps:

[0128] S301. For any one of the multiple indoor units, the indoor unit sends the operating data of the indoor unit to the indoor unit adjacent to the indoor unit, and receives the operating data of the adjacent indoor unit sent by the indoor unit adjacent to the indoor unit.

[0129] For any indoor unit in the multi-connected air conditioner system, there is a communication connection between the indoor unit and the indoor unit adjacent to the indoor unit. The indoor unit can send its own operating data and receive the operating data of the adjacent indoor unit sent by the adjacent indoor unit, so as to facilitate the fault diagnosis of both parties.

[0130] In some embodiments, the operating data of the indoor unit includes at least one of refrigerant flow rate, set air outlet temperature, actual air outlet temperature, air outlet angle, and air volume.

[0131] S302. Perform fault diagnosis on adjacent indoor units according to the operating data of the adjacent indoor units.

[0132] In some embodiments, after an indoor unit receives the operating data sent by an adjacent indoor unit, the indoor unit may perform fault diagnosis on the adjacent indoor unit based on the operating data of the adjacent indoor unit.

[0133] Optionally, the indoor unit performing fault diagnosis on the adjacent indoor unit based on the operating data of the adjacent indoor unit may be specifically implemented as: the indoor unit inputs the operating data of the adjacent indoor unit into a fault diagnosis model to obtain a fault diagnosis result. The fault diagnosis result indicates whether the adjacent indoor unit has a fault.

[0134] In some embodiments, each indoor unit among multiple indoor units has a pre-stored trained fault diagnosis model. After an indoor unit obtains the operating data of an adjacent indoor unit, it may input the operating data of the adjacent indoor unit into the fault diagnosis model to determine whether the adjacent indoor unit has a fault.

[0135] In some embodiments, the fault diagnosis model may be a fault diagnosis model based on the support vector machine algorithm.

[0136] Exemplarily, as Figure 4 shown in the topological structure, ID1-1, ID1-1-1, ID1-1-2, and ID1-1-3 are four indoor units in the same room and have the same set air outlet temperature. After operating for a period of time, each indoor unit will receive the set air outlet temperature and actual air outlet temperature of the adjacent indoor unit and input the set air outlet temperature and actual air outlet temperature into the fault diagnosis model for fault diagnosis. The result of the fault diagnosis model indicates whether the adjacent indoor unit has a fault.

[0137] S303. Send the fault diagnosis result to the adjacent indoor unit.

[0138] For any indoor unit in a multi-connected air-conditioning system, after the indoor unit obtains the fault diagnosis result of the adjacent indoor unit, it sends the fault diagnosis result to the adjacent indoor unit. Each indoor unit also performs fault diagnosis on itself according to its own operating data. When the fault diagnosis result of a certain indoor unit itself is a fault and the fault diagnosis result of an adjacent indoor unit to this indoor unit is also a fault, then this indoor unit is considered a faulty indoor unit.

[0139] In some embodiments, after confirming that an indoor unit is a faulty indoor unit, the faulty indoor unit will be forcibly shut down and feedback will be sent to the multi-connected air-conditioning system.

[0140] Exemplarily, as Figure 4 shown in the topological structure, ID1-1, ID1-1-1, ID1-1-2, and ID1-1-3 are four indoor units in the same room, with the same set outlet air temperature. After ID1-1-2 operates for a period of time, it performs fault diagnosis based on its own set outlet air temperature and actual outlet air temperature. If the difference between the set outlet air temperature and the actual outlet air temperature is large, it is considered that there is no cooling or heating effect, and it determines itself as a faulty indoor unit; at the same time, the adjacent indoor units ID1-1-1 and ID1-1-3 also determine ID1-1-2 as a faulty indoor unit, then ID1-1-2 is confirmed as a faulty indoor unit, and the indoor unit ID1-1-2 is forcibly shut down and feedback is sent to the multi-connected air-conditioning system.

[0141] S304. Adjust its own operating parameters according to the location of the faulty indoor unit.

[0142] In some embodiments, after determining that a certain indoor unit is a faulty indoor unit, the indoor units other than the faulty indoor unit among multiple indoor units can adjust their own operating parameters according to the location of the faulty indoor unit, so that the cooling capacity or heating capacity at the location of the faulty indoor unit can meet the user's needs.

[0143] It can be understood that after a certain indoor unit fails, the temperature at the location of this indoor unit cannot be adjusted due to the failure of the indoor unit. Based on this, the indoor units other than the faulty indoor unit in the multi-connected air-conditioning system can adjust their own operating parameters according to the location of the faulty indoor unit to assist in adjusting the temperature at the location of the faulty indoor unit.

[0144] In some embodiments, the operating parameters include: air volume, refrigerant flow rate, and outlet air angle.

[0145] Exemplarily, ID1-1, ID1-1-1, ID1-1-2, and ID1-1-3 are four indoor units in the same room, with the same set outlet air temperature. When ID1-1-3 determines that it has a fault based on its own operating data, and both adjacent ID-1-1 and ID1-1-2 indoor units determine that ID1-1-3 has a fault, ID1-1-3 is forcibly shut down and feedback is sent to the multi-connected air-conditioning system. ID1-1, ID1-1-1, and ID1-1-2 all adjust their own air volume and refrigerant flow rate to increase the cooling or heating capacity; at the same time, the baffle is adjusted to control the outlet air angle of the indoor unit so that the wind blows towards the location of ID1-1-3 to assist in improving the cooling or heating effect at the location of ID1-1-3.

[0146] In some embodiments, even when the indoor unit has no fault, the indoor unit can also adjust its own operating parameters to coordinate with nearby indoor units. For any indoor unit of a multi-connected air conditioner, the indoor unit can compare the operating data of the adjacent indoor unit with its own operating data based on its own operating data and the operating data of the adjacent indoor unit, and determine whether the adjacent indoor unit needs assistance. If no assistance is needed, the indoor unit operates normally; if assistance is needed, the operating parameters of the indoor unit are adjusted to assist the adjacent indoor unit. The method of assistance is similar to that for assisting a faulty indoor unit, which has been introduced above and will not be elaborated here.

[0147] Exemplarily, as Figure 4 shown in the topology structure, ID1-1, ID1-1-1, ID1-1-2, and ID1-1-3 are four indoor units at different positions in the same room, with the same set parameters, but the temperatures at different positions in the room are different, that is, the set temperatures of ID1-1, ID1-1-1, ID1-1-2, and ID1-1-3 are the same, and the actual temperatures of the environments where the indoor units are located are different. After operating for a period of time, ID1-1, ID1-1-1, ID1-1-2, and ID1-1-3 obtain their own operating data and the operating data of adjacent indoor units, and compare their own operating data with the operating data of adjacent indoor units. It is found that the actual temperatures of the environments where the indoor units of ID1-1, ID1-1-1, and ID1-1-3 are located have all reached the set temperature, and the actual temperature of the environment where the indoor unit of ID1-1-2 is located has not reached the set temperature. Then ID1-1, ID1-1-1, and ID1-1-3 adjust their own air outlet angles so that the wind blows towards the location of ID1-1-2 to assist ID1-1-2 in adjusting the temperature.

[0148] The following uses the accompanying drawings to give an example of the step flow of a multi-connected air conditioner system provided by an embodiment of the present application. Figure 10 The figure shows a schematic diagram of the overall step flow of a multi-connected air conditioner system provided by an embodiment of the present application.

[0149] As Figure 10 shown, when the multi-connected air conditioner system is in the operating state, one or more first indoor units in each level of the N levels of the multi-connected air conditioner system summarize the capacity demand information of adjacent second indoor units. The capacity demand information of the second indoor unit includes not only its own capacity demand information but also the capacity demand information of adjacent indoor units. After the first indoor unit finishes summarizing, the summarized capacity demand information is reported to an indoor unit at the upper level. Finally, the first indoor unit at the first level summarizes the capacity demand information of the indoor units in the N levels, and reports the summarized capacity demand information of the indoor units in the N levels to the outdoor unit.

[0150] The outdoor unit determines target operating parameters according to the capacity requirement information of N levels, and operates according to the target operating parameters. After the outdoor unit operates, refrigerant flow rate distribution is performed according to the capacity requirement information of the indoor units of N levels.

[0151] As described above, it is only the specific implementation manner of this application, but the protection scope of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be covered within the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

1. A multi-connected air conditioning system, characterized in that, including: an outdoor unit; a plurality of indoor units having a hierarchical topological structure, the topological structure including N levels, where N is an integer greater than 1; each of the N levels includes at least one first indoor unit and at least one second indoor unit; for each of the first indoor units, the first indoor unit is used to communicate with a second indoor unit adjacent to the first indoor unit and is also used to communicate with an indoor unit in the upper level of the level where the first indoor unit is located, wherein the first indoor unit in the first level of the N levels is used to communicate with the outdoor unit; for each of the second indoor units, the second indoor unit is used to communicate with an indoor unit adjacent to the second indoor unit; for any first indoor unit in the Nth level, the first indoor unit is used to aggregate its own capacity demand information and the capacity demand information of the second indoor unit adjacent to the first indoor unit, and report the aggregated capacity demand information to an indoor unit in the (N - 1)th level; for the first indoor unit in the first level, the first indoor unit in the first level is used to aggregate the capacity demand information of the indoor units in the N levels and report the aggregated capacity demand information of the indoor units in the N levels to the outdoor unit.

2. The multi-connected air-conditioning system according to claim 1, wherein for any first indoor unit in the Nth level, the first indoor unit is also used to store the capacity demand information of the second indoor unit adjacent to the first indoor unit; for the first indoor unit in the first level, the first indoor unit in the first level is also used to store the aggregated capacity demand information of the indoor units in the N levels.

3. The multi-connected air-conditioning system according to claim 2, characterized in that, the outdoor unit is used to receive the aggregated capacity demand information of the indoor units in the N levels reported by the first indoor unit in the first level.

4. The multi-connected air conditioning system according to claim 3, characterized in that, the outdoor unit includes a compressor, an expansion valve, and an outdoor fan; wherein, the expansion valve is used to adjust the refrigerant flow rate transmitted from the outdoor unit to the plurality of indoor units; the outdoor unit is also used to determine its own target operating parameters according to the aggregated capacity demand information of the indoor units in the N levels; the target operating parameters include the operating power of the compressor, the opening degree of the expansion valve, and the air volume of the outdoor fan; the outdoor unit is also used to operate according to the target operating parameters.

5. The multi-connected air conditioner system according to claim 4, wherein after the outdoor unit operates according to the target operating parameters, the outdoor unit is also used to allocate refrigerant flow rates for the indoor units in the N levels according to the aggregated capacity demand information of the indoor units in the N levels.

6. The multi-connected air-conditioning system according to any one of claims 1 to 5, characterized in that, the capacity demand information includes refrigerant demand.

7. The multi-connected air conditioner system according to claim 1, wherein for any indoor unit among the plurality of indoor units, the indoor unit is used to send the operating data of the indoor unit to an indoor unit adjacent to the indoor unit and receive the operating data of the adjacent indoor unit sent by the adjacent indoor unit, and the operating data includes at least one of refrigerant flow rate, set air outlet temperature, actual air outlet temperature, air outlet angle, and air volume of the air outlet.

8. The multi-connected air-conditioning system according to claim 7, wherein After receiving the operation data of the adjacent indoor unit sent by the adjacent indoor unit, the indoor unit is further configured to perform a fault diagnosis on the adjacent indoor unit according to the operation data of the adjacent indoor unit, and send the fault diagnosis result to the adjacent indoor unit.

9. The multi-connected air conditioner system according to claim 8, characterized in that, After determining that the adjacent indoor unit to this indoor unit is a faulty indoor unit, the indoor unit is further configured to adjust its own operation parameters according to the location of the faulty indoor unit, so as to increase the heating capacity or cooling capacity of the area where the faulty indoor unit is located; wherein, the operation parameters include the air volume, refrigerant flow rate, and air outlet angle.

10. The multi-connected air conditioning system according to claim 7, wherein, After receiving the operation data of the adjacent indoor unit sent by the adjacent indoor unit, the indoor unit is further configured to compare the operation data of the adjacent indoor unit with its own operation data and adjust its own operation parameters.

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