CN112378059A - Multi-split air conditioner system and automatic addressing method thereof, outdoor unit and storage medium - Google Patents

Abstract

The invention discloses a multi-online system and an automatic addressing method thereof, an outdoor unit and a storage medium, wherein the method comprises the following steps: the outdoor unit sends a query instruction to each indoor unit after being electrified so that the indoor units with real addresses can simultaneously reply equipment information; the outdoor unit determines the number of indoor units with real addresses according to the received equipment information, and performs virtual address roll calling and real address allocation on the indoor units without the real addresses after recording the real address information of each indoor unit with the real addresses according to the number of the indoor units with the real addresses, so that the real address query time can be greatly reduced, the automatic addressing efficiency is improved, and the debugging waiting time is shortened.

Description

Multi-split air conditioner system and automatic addressing method thereof, outdoor unit and storage medium

Technical Field

The invention relates to the technical field of air conditioners, in particular to a multi-split air conditioner system, an automatic addressing method thereof, an outdoor unit and a storage medium.

Background

The 485 bus is a typical master-slave field bus, which is used as an important data interaction channel and widely applied to various control fields. The 485 bus can realize one-to-one and one-to-many communication functions, and the multi-split air conditioner is a refrigeration system consisting of a host (an outdoor unit) and a plurality of slave units (an indoor unit and an outdoor unit except the host), and is converted into a one-to-many system by a control system. When one-to-many control and data interaction are carried out, a unique address needs to be marked for each slave machine to be used as a basis for host roll calling.

In the related art, when network address setting is performed, two modes, namely manual dial setting and network automatic addressing, are mainly included. The manual dial setting needs to disassemble and assemble equipment, so that the efficiency is low, errors are easy to occur, and the larger the network is, the lower the efficiency is, and the higher the error rate is; the network automatic addressing is that automatic address allocation is carried out by a network without manual setting, a fixed periodic polling scanning mode is mainly adopted, for example, an outdoor unit carries out roll calling on all slave machines one by one, the slave machines with real addresses reply, share a point X wheel, then roll calling virtual addresses and share a point Y wheel in sequence, omission is reduced by multiple roll calling, but roll calling is continuously and repeatedly circulated, so that the automatic addressing efficiency is low, and the debugging waiting time is long.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, a first objective of the present invention is to provide an automatic addressing method for a multi-split system, which can effectively improve automatic addressing efficiency and reduce debugging latency.

A second object of the invention is to propose a computer-readable storage medium.

A third object of the present invention is to provide an outdoor unit.

A fourth object of the present invention is to provide a multi-split system.

In order to achieve the above object, an embodiment of a first aspect of the present invention provides an automatic addressing method for a multi-split system, including: the outdoor unit sends a query instruction to each indoor unit after being electrified so that the indoor units with real addresses can simultaneously reply equipment information; and the outdoor unit determines the number of indoor units with real addresses according to the received equipment information, records the real address information of each indoor unit with real addresses according to the number of the indoor units with real addresses, and then performs virtual address roll calling and real address allocation on the indoor units without real addresses.

According to the automatic addressing method of the multi-split system, the outdoor unit sends the query instruction to each indoor unit after being electrified so that the indoor units with real addresses can reply the equipment information at the same time, then the outdoor unit determines the number of the indoor units with the real addresses according to the received equipment information, and carries out virtual address roll calling and real address allocation on the indoor units without the real addresses after recording the real address information of each indoor unit with the real addresses according to the number of the indoor units with the real addresses, so that the real address query time can be greatly reduced, the automatic addressing efficiency is improved, and the debugging waiting time is reduced.

According to an embodiment of the present invention, the outdoor unit determines that there is only one indoor unit according to the received device information, and records the real address information of the indoor unit when the verification passes.

According to an embodiment of the present invention, when the outdoor unit determines that the received device data has an error according to the received device information, it determines that a plurality of indoor units with real addresses exist in the multi-split air-conditioning system, and performs real address roll calling on the plurality of indoor units with real addresses one by one to record real address information of each indoor unit with real addresses.

According to an embodiment of the present invention, when real address roll names are performed one by one for a plurality of indoor units having real addresses, if an outdoor unit receives error reply data, it is determined that there are indoor units having the same real address in a multi-split system, and address allocation is interrupted.

According to an embodiment of the present invention, when the outdoor unit determines that there is no indoor unit with a real address in the multiple on-line system according to the received device information, the outdoor unit directly skips the real address query roll call step.

According to an embodiment of the present invention, when performing virtual address roll calling on an indoor unit without a real address, if the outdoor unit receives error reply data, the roll calling needs to be repeated for one round, so that the indoor unit which does not receive the real address assigned by the outdoor unit regenerates the virtual address and waits for the next roll calling.

According to one embodiment of the invention, before the outdoor unit is powered on, each indoor unit is powered on firstly, and whether a real address is stored in the indoor unit after the outdoor unit is powered on is checked, wherein if the real address is checked to be stored in the indoor unit, the real address is used as a network address; and if the verification has no real address, generating a virtual address according to a random number algorithm.

In order to achieve the above object, a second embodiment of the present invention provides a computer-readable storage medium, on which an automatic addressing program of a multi-split system is stored, and the automatic addressing program of the multi-split system is executed by a processor to implement the automatic addressing method of the multi-split system.

According to the computer-readable storage medium of the embodiment of the invention, by the automatic addressing method of the multi-split system, the real address query time can be greatly reduced, the automatic addressing efficiency is improved, and the debugging waiting time is reduced.

In order to achieve the above object, a third embodiment of the present invention provides an outdoor unit, which includes a memory, a processor, and an automatic addressing program of a multi-split system that is stored in the memory and is executable on the processor, where the processor implements the automatic addressing method of the multi-split system when executing the automatic addressing program.

According to the outdoor unit of the embodiment of the invention, the real address query time can be greatly reduced, the automatic addressing efficiency is improved, and the debugging waiting time is reduced by the automatic addressing method of the multi-split system.

In order to achieve the above object, a fourth aspect of the present invention provides a multi-split system, including an outdoor unit and a plurality of indoor units, where the outdoor unit sends a query instruction to each indoor unit after being powered on; the indoor unit with the real address in the plurality of indoor units simultaneously replies equipment information to the outdoor unit; and the outdoor unit determines the number of indoor units with real addresses according to the received equipment information, records the real address information of each indoor unit with real addresses according to the number of the indoor units with real addresses, and then performs virtual address roll calling and real address allocation on the indoor units without real addresses.

According to the multi-split system provided by the embodiment of the invention, the outdoor unit sends a query instruction to each indoor unit after being powered on, the indoor units with real addresses in the indoor units simultaneously reply equipment information to the outdoor unit, then the outdoor unit determines the number of the indoor units with real addresses according to the received equipment information, and performs virtual address roll calling and real address allocation on the indoor units without real addresses after recording the real address information of each indoor unit with real addresses according to the number of the indoor units with real addresses, so that the real address query time can be greatly reduced, the automatic addressing efficiency is improved, and the debugging waiting time is reduced.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

Fig. 1 is a network architecture diagram of a multi-split system according to an embodiment of the present invention;

fig. 2 is a flowchart of an automatic addressing method of a multi-split system according to an embodiment of the present invention;

fig. 3 is a flowchart of an automatic addressing method of a multi-split system according to another embodiment of the present invention;

fig. 4 is a schematic configuration diagram of a multi-split system according to an embodiment of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

A multi-split system, an automatic addressing method thereof, an outdoor unit, and a storage medium according to an embodiment of the present invention will be described with reference to the accompanying drawings.

In the present application, referring to fig. 1, a multi-split system includes an outdoor unit and a plurality of indoor units, where the outdoor unit and the plurality of indoor units are in the same communication network, such as an RS485 network. When the automatic addressing is carried out, the outdoor unit can be used as a host machine and is responsible for the roll calling of the communication time sequence, and the indoor units and the outdoor units except the host machine are used as slave machines and are used for carrying out data interaction with the host machine and replying the roll calling of the host machine.

In one embodiment, an automatic addressing method for a multi-split air-conditioning system is provided, and the method is applied to an outdoor unit of the multi-split air-conditioning system, and as shown in fig. 2, the method may include the following steps:

step S101, after the outdoor unit is powered on, an inquiry command is sent to each indoor unit, so that the indoor units with real addresses can reply to the equipment information at the same time.

In one embodiment, before the outdoor unit is powered on, each indoor unit is powered on firstly, whether a real address is stored in the indoor unit after the indoor unit is powered on is checked, and if the real address is checked to be stored in the indoor unit, the real address is used as a network address; and if the verification has no real address, generating a virtual address according to a random number algorithm.

Specifically, when the automatic addressing is performed, all the slave machines (a plurality of indoor machines and the outdoor machine except the master machine) can be powered on, after the slave machines are powered on, the slave machines check whether real addresses are stored in the slave machines, the real addresses are unique identification marks which are distributed by the master machine and used for calibrating the slave machines in the network, and if the real addresses are checked to exist in the slave machines, the real addresses are used as network addresses; if it is verified that no real address exists, i.e. the host does not assign an address to it, the virtual address can be generated using random number arithmetic, i.e. the virtual address is an address generated by the slave through its own algorithm. In the present application, according to the design scale of the communication network, the range of the real address is defined as 1-N, the range of the virtual address is defined as X-Y, and the real address and the virtual address are not overlapped.

Then, the host (i.e. the outdoor unit) is powered on, and after the host is powered on, the host broadcasts an information query frame to the communication bus (RS485 bus), wherein the information query frame contains a query instruction, and the query instruction is used for requesting all the slave units with real addresses to simultaneously reply the device information after receiving the information query frame, namely all the slave units with real addresses simultaneously send the device information of the slave units to the communication bus.

And step S102, the outdoor unit determines the number of indoor units with real addresses according to the received equipment information, records the real address information of each indoor unit with real addresses according to the number of the indoor units with real addresses, and then performs virtual address roll calling and real address allocation on the indoor units without real addresses.

In one embodiment, the outdoor unit judges that only one indoor unit has the device data according to the received device information, and records the real address information of the indoor unit when the verification is passed.

Specifically, after all the slaves with real addresses send their own device information to the communication bus at the same time, if the master receives correct device data and the check passes, it indicates that only one slave currently has a real address, because when there are multiple slaves with real addresses sending device information to the communication bus at the same time, data collision may occur, and the master will not receive correct device data. When the host determines that only one slave machine has the real address, the host records the real address of the slave machine, skips the step of inquiring the roll call of the real address, and performs virtual address roll call and real address allocation on the indoor machine without the real address.

In one embodiment, when the outdoor unit judges that the received device data has an error according to the received device information, it determines that a plurality of indoor units with real addresses exist in the multi-split system, and performs real address roll calling on the plurality of indoor units with real addresses one by one to record real address information of each indoor unit with real addresses.

Specifically, after all the slaves having real addresses simultaneously send their own device information to the communication bus, if the master receives wrong device data and the check fails, it indicates that there are currently a plurality of slaves having real addresses, and at this time, the master performs real address roll calling on the plurality of slaves having real addresses one by one, for example, there are currently two slaves having real addresses, the master first performs roll calling on one of the slaves having real addresses and records the real address information of the slave after the roll calling passes, and then the master performs roll calling on the other slave having real addresses and records the real address information of the slave after the roll calling passes. After the real address inquiry roll calling is completed, the host computer carries out virtual address roll calling and real address allocation on the indoor units without real addresses.

Further, when real address roll names are performed one by one for a plurality of indoor units with real addresses, if the outdoor unit receives error reply data, it is determined that the indoor units with the same real address exist in the multi-split system, and address allocation is interrupted.

Specifically, when the master performs real address roll calling on a plurality of slaves with real addresses one by one, if the master receives wrong reply data, the roll calling of the real addresses is repeated, if the received reply data is still wrong, the situation that the real addresses of the slaves are the same in the multi-split system is judged, namely the slaves with the same real addresses exist, at the moment, address allocation is interrupted, and an alarm is given out to display address conflict. Therefore, the reliability and the accuracy of automatic addressing can be improved.

In one embodiment, when the outdoor unit determines that the indoor unit with the real address does not exist in the multi-split system according to the received equipment information, the real address query roll calling step is directly skipped.

That is, after all the slaves having real addresses send their own device information to the communication bus at the same time, if the master does not receive any reply data, it indicates that there is no slave having real address in the multi-split system, and at this time, the outdoor unit directly skips the real address query roll call step, and performs virtual address roll call and real address assignment to the indoor unit without real address.

In the embodiment, when the real address is queried for roll calling, the real address query time can be greatly reduced by using a data conflict mechanism, the automatic addressing efficiency is improved, and the debugging waiting time is reduced.

Further, after the outdoor unit completes or skips the real address inquiry roll call step in the above manner, virtual address roll call is started and a corresponding real address is assigned to the slave having the virtual address. Supposing that the range of the virtual address is X-Y, sequentially calling the virtual address by the outdoor unit, distributing the real address to the slave units with the virtual address, simultaneously recording the number of the real addresses, judging whether the number of the slave units is the same as the engineering installation number, and if so, finishing the automatic addressing; or the host displays the recorded number of the slave machines, the debugging personnel determines whether the number of the slave machines is the same as the engineering installation number, and if the number of the slave machines is the same as the engineering installation number, the debugging personnel manually confirms that the automatic addressing quits.

In the example, by using a statistical display or judgment mode, the time for the periodic roll call distribution of the virtual address can be greatly reduced, the automatic addressing efficiency is improved, and the debugging waiting time is shortened.

In one embodiment, when virtual address roll calling is performed on an indoor unit without a real address, if the outdoor unit receives error reply data, the roll calling needs to be repeated for one round, so that the indoor unit which does not receive the real address assigned by the outdoor unit regenerates the virtual address and waits for the next roll calling.

Specifically, when the host performs virtual address roll calling on the slave machine without the real address, if the host receives wrong reply data, the virtual address is recorded and added into a roll queue of next roll calling, then the next virtual address roll calling is performed, and the execution is repeated until all the virtual address roll calling of the current roll is completed. And then, carrying out a new round of roll calling according to the virtual addresses needing to be repeatedly roll called and recorded in the queue until all the virtual address roll calling in the queue is completed. And repeating the process until the virtual address roll names of all the slaves without real addresses are completed. After receiving the virtual address roll call of the master, the slave without the real address regenerates the virtual address and adds the virtual address into the roll call queue of the next round to wait for roll call again if the virtual address roll call of the master is not received. Therefore, the reliability and the accuracy of automatic addressing can be improved.

In order to make the present invention more clear to those skilled in the art, the present invention will be further explained with reference to fig. 3, and as shown in fig. 3, the automatic addressing method of the multi-split system may include the following steps:

in step S201, the indoor unit is powered on first, and the outdoor unit is powered on later.

In step S202, the indoor unit confirms the real address of the local unit.

Step S203, if the real address exists, step S204 is executed; otherwise, step S205 is executed.

In step S204, the indoor unit generates a virtual address.

In step S205, the outdoor unit sends a real address query command to request the indoor units with real addresses to reply to the device information at the same time.

In step S206, the outdoor unit listens to the bus reply data.

In step S207, if correct data is received, step S208 is performed.

In step S208, the outdoor unit recognizes that there is only one real address, that is, there is only one indoor unit having a real address.

In step S209, if no data is received, step S210 is performed.

In step S210, the outdoor unit recognizes the indoor unit without the real address.

In step S211, if error data is received, step S212 is performed.

In step S212, the outdoor unit polls the roll call real address indoor units, that is, when there are a plurality of indoor units with real addresses, roll call is performed in a polling roll call manner.

In step S213, the outdoor unit stores all real addresses.

In step S214, the outdoor unit roll call virtual addresses one by one and assigns real addresses, that is, roll call is performed on all indoor units without real addresses one by one and each indoor unit is assigned a real address.

In step S215, the outdoor unit counts the number of real addresses displayed.

And step S216, if the number of the real addresses is confirmed to be correct, the addressing is carried out, namely if the number of the real addresses is confirmed to be the same as the engineering installation number, the addressing is finished, and the addressing is quitted.

In the above example, in the real address roll calling phase, the addressing efficiency is effectively improved by using a data collision mechanism, in the virtual address roll calling and real address distribution phase, the addressing efficiency is effectively improved by using a statistical method, and meanwhile, in the process of polling roll calling real address indoor units and roll calling virtual address rooms one by one, an error correction method is also adopted, so that the addressing reliability and accuracy can be effectively improved.

In summary, according to the automatic addressing method of the multi-split system in the embodiment of the present invention, after the outdoor unit is powered on, an inquiry instruction is sent to each indoor unit, so that the indoor units with real addresses reply to the device information at the same time, then the outdoor unit determines the number of the indoor units with real addresses according to the received device information, and after the real address information of each indoor unit with real addresses is recorded according to the number of the indoor units with real addresses, virtual address roll calling and real address allocation are performed on the indoor units without real addresses, thereby greatly reducing the real address inquiry time, improving the automatic addressing efficiency, and reducing the debugging waiting time.

Embodiments of the present invention also provide a computer-readable storage medium having stored thereon an auto addressing program of a multi-split system, which when executed by a processor implements the above-described auto addressing method of the multi-split system.

According to the computer-readable storage medium of the embodiment of the invention, by the automatic addressing method of the multi-split system, the real address query time can be greatly reduced, the automatic addressing efficiency is improved, and the debugging waiting time is reduced.

The embodiment of the invention also provides an outdoor unit, which comprises a memory, a processor and an automatic addressing program of the multi-online system, wherein the automatic addressing program is stored in the memory and can be operated on the processor, and when the processor executes the automatic addressing program, the automatic addressing method of the multi-online system is realized.

According to the outdoor unit of the embodiment of the invention, the real address query time can be greatly reduced, the automatic addressing efficiency is improved, and the debugging waiting time is reduced by the automatic addressing method of the multi-split system.

Referring to fig. 4, the multi-split system 100 includes an outdoor unit 110 and a plurality of indoor units 120, where the outdoor unit 110 sends a query instruction to each indoor unit 120 after powering on; the indoor units 120 having the real addresses among the plurality of indoor units 120 simultaneously reply the device information to the outdoor unit 110; the outdoor unit 110 determines the number of indoor units having real addresses from the received device information, records the real address information of each indoor unit 120 having real addresses from the number of indoor units having real addresses, and then performs virtual address roll calling and real address assignment to the indoor units 120 having no real addresses.

It should be noted that, for the description of the multi-split system in the present application, please refer to the description of the automatic addressing method of the multi-split system in the present application, and details are not repeated herein.

According to the multi-split system provided by the embodiment of the invention, the outdoor unit sends a query instruction to each indoor unit after being powered on, the indoor units with real addresses in the indoor units simultaneously reply equipment information to the outdoor unit, then the outdoor unit determines the number of the indoor units with real addresses according to the received equipment information, and performs virtual address roll calling and real address allocation on the indoor units without real addresses after recording the real address information of each indoor unit with real addresses according to the number of the indoor units with real addresses, so that the real address query time can be greatly reduced, the automatic addressing efficiency is improved, and the debugging waiting time is reduced.

It should be noted that the logic and/or steps represented in the flowcharts or otherwise described herein, such as an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.

It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (10)

1. An automatic addressing method for a multi-split system, comprising:

the outdoor unit sends a query instruction to each indoor unit after being electrified so that the indoor units with real addresses can simultaneously reply equipment information;

and the outdoor unit determines the number of indoor units with real addresses according to the received equipment information, records the real address information of each indoor unit with real addresses according to the number of the indoor units with real addresses, and then performs virtual address roll calling and real address allocation on the indoor units without real addresses.

2. The automatic addressing method of a multi-split system as claimed in claim 1, wherein the outdoor unit judges that there is only one indoor unit's device data according to the received device information and records real address information of the indoor unit when the verification passes.

3. The method of claim 1, wherein when the outdoor unit determines that the received device data has an error according to the received device information, it determines that a plurality of indoor units having real addresses exist in the multi-split system, and performs real address roll-calling on the plurality of indoor units having real addresses one by one to record real address information of each indoor unit having real addresses.

4. The method of claim 3, wherein when real address roll names are performed one by one for a plurality of indoor units having real addresses, if the outdoor unit receives error reply data, it is determined that indoor units having the same real address exist in the multi-split system, and address allocation is interrupted.

5. The method of claim 1, wherein when the outdoor unit determines that there is no indoor unit having a real address in the multi-split system according to the received device information, the outdoor unit directly skips a real address query roll call step.

6. The method of any one of claims 1 to 5, wherein when virtual address roll calling is performed for an indoor unit without a real address, if the outdoor unit receives error reply data, the roll calling is repeated for one round, so that the indoor unit without the real address assigned by the outdoor unit regenerates the virtual address and waits for the next roll calling.

7. The method of claim 1, wherein each indoor unit is powered on before the outdoor unit is powered on, and checks whether a real address is stored in itself after the outdoor unit is powered on, wherein,

if the real address is verified to exist, the real address is used as a network address;

and if the verification has no real address, generating a virtual address according to a random number algorithm.

8. A computer-readable storage medium, having stored thereon an auto-addressing program of a multi-split system, which when executed by a processor implements the auto-addressing method of the multi-split system according to any one of claims 1 to 7.

9. An outdoor unit, comprising a memory, a processor, and an auto-addressing program of a multi-split air conditioner system stored in the memory and executable on the processor, wherein the processor implements the auto-addressing method of the multi-split air conditioner system according to any one of claims 1 to 7 when executing the auto-addressing program.

10. A multi-split system is characterized by comprising an outdoor unit and a plurality of indoor units, wherein,

the outdoor unit sends a query instruction to each indoor unit after being electrified;

the indoor units with real addresses in the indoor units reply equipment information to the outdoor unit at the same time;

and the outdoor unit determines the number of indoor units with real addresses according to the received equipment information, records the real address information of each indoor unit with real addresses according to the number of the indoor units with real addresses, and then performs virtual address roll calling and real address allocation on the indoor units without real addresses.

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