Multi-split system, control method and equipment thereof and medium

Abstract

The invention provides a multi-split system and a control method, equipment and medium thereof, and the control method comprises the following steps: if at least one indoor unit in the multi-split system is detected to be in a shutdown state, acquiring the adjusting capacity of the indoor unit in each shutdown state; the operation frequency of the compressor is adjusted to the target frequency according to the adjusting capacity of each indoor unit in the shutdown state in the current environment adjusting mode of the multi-split system, the upstream control valve connected with the indoor unit in the shutdown state is at least closed, common control over the frequency of the compressor and the control valve is achieved, the frequency of the compressor is reduced, and the service life of the compressor is prolonged. And the refrigerant in the indoor unit in the shutdown state is prevented from participating in heat exchange, and the energy consumption of the multi-split system is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and specifically provides a multi-split system and a control method, device and medium thereof. Background Art

[0002] In multi-split systems such as one-to-many air conditioners commonly seen on the market, when one or more indoor units are turned on, refrigerant also flows through the indoor units that are not in operation, participating in the heat exchange of the indoor units' heat exchangers and causing unnecessary energy loss.

[0003] Therefore, how to reduce the energy consumption loss of the multi-split system is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0004] In order to overcome the above-mentioned defects, the present invention is proposed to provide a control method, device, equipment, system and medium for a multi-split system that solves or at least partially solves the technical problem of large energy loss in the multi-split system.

[0005] In a first aspect, the present invention provides a control method for a multi-split system, the control method for the multi-split system comprising:

[0006] If it is detected that at least one indoor unit in the multi-connected system is in a shutdown state, the adjustment capability of each indoor unit in the shutdown state is obtained;

[0007] According to the regulation capacity of each indoor unit in the shutdown state under the current environmental regulation mode of the multi-split system, the operating frequency of the compressor is adjusted to the target frequency, and at least the upstream control valve connected to the indoor unit in the shutdown state is closed; wherein the upstream control valve is the control valve connected to the indoor unit in the shutdown state through which the refrigerant first flows under the current environmental regulation mode of the multi-split system.

[0008] Furthermore, in the control method of the multi-split system described above, adjusting the operating frequency of the compressor to the target frequency according to the adjustment capability of each indoor unit in the shutdown state in the current environment adjustment mode of the multi-split system includes:

[0009] Input the adjustment capacity of each indoor unit in the shutdown state into the following calculation formula to obtain the target frequency of the compressor;

[0010] Wherein, the calculation formula is as follows:

[0011] F1=(P n -P x1 -P x2 -......P xi )*F

[0012] P n

[0013] Among them, F1 represents the target frequency, P n Indicates the total adjustment capacity of all indoor units in the current environment adjustment mode of the multi-connected system, P xi It represents the regulating capacity of the indoor unit in the i-th shutdown state, and F represents the frequency of the compressor when all indoor units are in the running state.

[0014] Furthermore, the control method of the multi-link system described above further includes:

[0015] If it is detected that the multi-split system enters the defrost mode, all control valves connected to the indoor units are controlled to open, and the operating frequency of the compressor is adjusted to the defrost frequency.

[0016] Furthermore, in the control method of the multi-split system described above, at least closing the upstream control valve connected to the indoor unit in the shutdown state includes:

[0017] Close only the upstream control valve connected to the stopped indoor unit; or,

[0018] At the same time, close the upstream control valve connected to the indoor unit in the stopped state and the downstream control valve connected to the indoor unit in the stopped state;

[0019] The downstream control valve is a control valve connected to an indoor unit in a shutdown state and through which the refrigerant flows in the current environmental adjustment mode of the multi-split system.

[0020] Furthermore, the control method of the multi-link system described above further includes:

[0021] Get the total refrigerant flow of the indoor unit in operation state;

[0022] If the total refrigerant flow rate is less than a preset threshold, at least one indoor unit in a stopped state is selected from all indoor units in a stopped state as a target indoor unit, and a control valve connected to each target indoor unit is opened.

[0023] Furthermore, in the control method of the multi-split system described above, selecting at least one indoor unit in a stopped state from all indoor units in a stopped state as a target indoor unit comprises:

[0024] Based on the time of entering the shutdown state, at least one indoor unit in the shutdown state is selected in order from the latest to the earliest time of entering the shutdown state as the target indoor unit.

[0025] Furthermore, the control method of the multi-link system described above further includes:

[0026] If the total refrigerant flow is greater than or equal to a preset threshold, a fault prompt message indicating that the control valve is not closed is output.

[0027] In a second aspect, the present invention provides a control device for a multi-split system, the control device for the multi-split system comprising a processor and a storage device, the storage device being suitable for storing a plurality of program codes, the program codes being suitable for being loaded and run by the processor to execute any one of the control methods for the multi-split system described above.

[0028] In a third aspect, a multi-split system is provided, which includes the control device of the multi-split system as described above.

[0029] In a fourth aspect, a computer-readable storage medium is provided, in which a plurality of program codes are stored, wherein the program codes are suitable for being loaded and run by a processor to execute any of the control methods of the multi-connected system described above.

[0030] The above one or more technical solutions of the present invention have at least one or more of the following beneficial effects:

[0031] In the technical solution for implementing the present invention, if it is detected that at least one indoor unit in the multi-split system is in a shutdown state, the regulation capacity of each indoor unit in the shutdown state is obtained; according to the regulation capacity of each indoor unit in the shutdown state under the current environmental adjustment mode of the multi-split system, the operating frequency of the compressor is adjusted to the target frequency, and at least the upstream control valve connected to the indoor unit in the shutdown state is closed, thereby realizing the joint control of the compressor frequency and the control valve, reducing the compressor frequency, preventing the refrigerant in the indoor unit in the shutdown state from participating in heat exchange, and reducing the energy consumption of the multi-split system. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The disclosure of the present invention will become more easily understood with reference to the accompanying drawings. It is easy for those skilled in the art to understand that these drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present invention. In addition, similar numbers in the figures are used to represent similar components, among which:

[0033] Figure 1 is a schematic flow chart of main steps of a control method for a multi-connected system according to an embodiment of the present invention;

[0034] Figure 2 is a schematic flow chart of main steps of a method for controlling a multi-connected system according to another embodiment of the present invention;

[0035] Figure 3 It is a main structural block diagram of a control device of a multi-connected system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0036] Some embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0037] In the description of the present invention, "module" and "processor" may include hardware, software or a combination of the two. A module may include hardware circuits, various suitable sensors, communication ports, and memories, and may also include software parts, such as program codes, or a combination of software and hardware. The processor may be a central processing unit, a microprocessor, an image processor, a digital signal processor, or any other suitable processor. The processor has data and / or signal processing functions. The processor may be implemented in software, hardware, or a combination of the two. Non-temporary computer-readable storage media include any suitable medium that can store program codes, such as a magnetic disk, a hard disk, an optical disk, a flash memory, a read-only memory, a random access memory, and the like. The term "A and / or B" means all possible combinations of A and B, such as only A, only B, or A and B. The term "at least one A or B" or "at least one of A and B" has a similar meaning to "A and / or B", and may include only A, only B, or A and B. The singular terms "one" and "the" may also include plural forms.

[0038] In multi-split systems such as one-to-many air conditioners commonly seen on the market, when one or more indoor units are turned on, refrigerant also flows through the indoor units that are not in operation, participating in the heat exchange of the indoor units' heat exchangers and causing unnecessary energy loss.

[0039] Therefore, in order to solve the above technical problems, the present invention provides the following technical solutions:

[0040] See attached Figure 1 , Figure 1 FIG. 1 is a flow chart showing the main steps of a control method for a multi-connected system according to an embodiment of the present invention. Figure 1 As shown, the control method of the multi-link system in the embodiment of the present invention mainly includes the following steps 101-102.

[0041] Step 101: if it is detected that at least one indoor unit in the multi-split system is in a shutdown state, the adjustment capability of each indoor unit in the shutdown state is obtained;

[0042] In a specific implementation process, the state of each indoor unit in the multi-split system can be detected in real time. If it is detected that at least one indoor unit in the multi-split system is in a shutdown state, in order to reduce the energy loss of the multi-split system, the adjustment capacity of each indoor unit in the shutdown state can be obtained, such as heating capacity, cooling capacity, etc. Among them, the adjustment capacity of each indoor unit in the shutdown state can be obtained according to the manual of the multi-split system when it leaves the factory, or can be obtained by other methods, and this embodiment does not make specific restrictions.

[0043] Step 102: According to the regulation capability of each indoor unit in the shutdown state in the current environment regulation mode of the multi-split system, the operating frequency of the compressor is adjusted to the target frequency, and at least the upstream control valve connected to the indoor unit in the shutdown state is closed;

[0044] In a specific implementation process, if the frequency of the compressor still runs at the operating frequency before the shutdown after the indoor unit is shut down, it will cause energy waste. At the same time, if the refrigerant still flows through the indoor unit in the shutdown state, it will exchange heat with the heat exchanger of the indoor unit, causing energy waste. Therefore, according to the adjustment capacity of each indoor unit in the shutdown state in the current environmental adjustment mode of the multi-split system, the operating frequency of the compressor can be adjusted to the target frequency, and at least the upstream control valve connected to the indoor unit in the shutdown state can be closed. The upstream control valve is a control valve connected to the indoor unit in the shutdown state through which the refrigerant first flows in the current environmental adjustment mode of the multi-split system.

[0045] Specifically, the adjustment capacity of each indoor unit in the shutdown state can be input into the following calculation formula to obtain the target frequency of the compressor;

[0046] Wherein, the calculation formula is as follows:

[0047] F1=(P n -P x1 -P x2 -......P xi )*F

[0048] P n

[0049] Among them, F1 represents the target frequency, P n Indicates the total adjustment capacity of all indoor units in the current environment adjustment mode of the multi-connected system, P xi It represents the regulating capacity of the indoor unit in the i-th shutdown state, and F represents the frequency of the compressor when all indoor units are in the running state.

[0050] In a specific implementation process, closing at least the upstream control valve connected to the indoor unit in the shutdown state includes:

[0051] Only close the upstream control valve connected to the indoor unit in the stopped state, which can prevent the refrigerant from flowing into the indoor unit.

[0052] At the same time, the upstream control valve connected to the indoor unit in the shutdown state and the downstream control valve connected to the indoor unit in the shutdown state are closed. In this way, the upstream and downstream control valves connected to the indoor unit in the shutdown state are closed at the same time, which can better achieve the purpose of reducing energy consumption. Wherein, the downstream control valve is the control valve connected to the indoor unit in the shutdown state through which the refrigerant flows after in the current environmental adjustment mode of the multi-split system.

[0053] Specifically, when the multi-split system operates in heating mode, the upstream control valve may be a solenoid valve and the downstream control valve may be an expansion valve. When the multi-split system operates in cooling mode or dehumidification mode, the upstream control valve may be an expansion valve and the downstream control valve may be a solenoid valve.

[0054] The control method of the multi-split system of the present embodiment obtains the regulation capacity of each indoor unit in the shutdown state if it is detected that at least one indoor unit in the multi-split system is in the shutdown state; adjusts the operating frequency of the compressor to the target frequency according to the regulation capacity of each indoor unit in the shutdown state under the current environmental adjustment mode of the multi-split system, and at least closes the upstream control valve connected to the indoor unit in the shutdown state, thereby realizing the joint control of the compressor frequency and the control valve, reducing the compressor frequency, preventing the refrigerant in the indoor unit in the shutdown state from participating in the heat exchange, and reducing the energy consumption of the multi-split system.

[0055] See attached Figure 2 , Figure 2 FIG. 1 is a flow chart showing the main steps of a control method for a multi-connected system according to another embodiment of the present invention. Figure 2 As shown, the control method of the multi-link system in the embodiment of the present invention mainly includes the following steps 201 to 102.

[0056] Step 201: if it is detected that at least one indoor unit in the multi-split system is in a shutdown state, the adjustment capability of each indoor unit in the shutdown state is obtained;

[0057] Step 202: According to the regulation capability of each indoor unit in the shutdown state in the current environment regulation mode of the multi-split system, the operating frequency of the compressor is adjusted to the target frequency, and at least the upstream control valve connected to the indoor unit in the shutdown state is closed;

[0058] Step 203, obtaining the total refrigerant flow of the indoor unit in the running state;

[0059] In a specific implementation process, the total refrigerant flow of the indoor unit in operation can be obtained in real time through a flow sensor arranged at the compressor inlet.

[0060] Step 204, detect whether the total flow rate of the refrigerant is less than a preset threshold; if so, execute step 205, if not, execute step 206;

[0061] In a specific implementation process, the predicted value of the refrigerant flow rate flowing through each indoor unit during operation can be obtained according to the adjustment capacity of each indoor unit. In this way, a possible total refrigerant flow rate can be obtained as a preset threshold value according to the adjustment capacity of the indoor unit in the operating state, and then the obtained total refrigerant flow rate is compared with the preset threshold value to detect whether the total refrigerant flow rate is less than the preset threshold value. If so, step 205 is executed, and if not, step 206 is executed.

[0062] Step 205: Select at least one indoor unit in a stopped state from all indoor units in a stopped state as a target indoor unit, and open a control valve connected to each target indoor unit;

[0063] In a specific implementation process, if the total refrigerant flow rate is less than a preset threshold, there may be insufficient refrigerant flowing into a part of the indoor units, and their adjustment ability is poor. In order to avoid frequent adjustment of the compressor, at least one indoor unit in a stopped state can be selected from all indoor units in a stopped state as the target indoor unit, and the control valve connected to each target indoor unit can be opened to allow the refrigerant in some of the indoor units in a stopped state to supplement the total refrigerant flow rate.

[0064] It should be noted that although a certain amount of refrigerant will flow through some of the indoor units in the shutdown state in this situation, the compressor frequency is relatively low, the total energy consumption will not increase significantly, and the adjustment ability of the indoor units in the running state can be guaranteed. At the same time, it can also avoid frequent adjustments to the compressor and extend the life of the compressor.

[0065] In a specific implementation process, based on the time of entering the shutdown state, at least one indoor unit in the shutdown state can be selected as the target indoor unit in order from late to early time of entering the shutdown state. In this way, it can be ensured that the temperature difference between the refrigerant temperature in the indoor unit that enters the shutdown state latest and the required temperature is small, and its energy consumption is relatively low during heat exchange.

[0066] Step 206: Outputting fault prompt information indicating that the control valve is not closed.

[0067] In a specific implementation process, if the total refrigerant flow is greater than or equal to a preset threshold, it means that some control valves may fail to close due to failures. Therefore, a fault prompt message indicating that the control valve has not been closed may be output.

[0068] In a specific implementation process, the control valves connected to the indoor units in the shutdown state can be briefly opened in sequence in a certain order to detect the change in the total refrigerant flow rate. If the change is greater than a preset change, it means that there is no fault in briefly opening the control valve connected to the indoor units in the shutdown state. Conversely, if the change is less than or equal to the preset change, it means that there is a fault in briefly opening the control valve connected to the indoor units in the shutdown state, thereby locating the fault point.

[0069] In a specific implementation process, if it is detected that the multi-split system enters the defrost mode, all control valves connected to the indoor units can be controlled to open, and the operating frequency of the compressor can be adjusted to the defrost frequency. When exiting the defrost mode, the control valves of the indoor units in the shutdown state can be closed.

[0070] In a specific implementation process, the specific operation process of the control method of the multi-link system of the embodiment of the present invention is as follows:

[0071] (1) In heating mode, the indoor unit is fully open and the solenoid valves are fully open to the maximum opening.

[0072] (2) In heating mode, several indoor units are not turned on. For the indoor units that are not turned on, the expansion valves are closed and the solenoid valves are closed. The refrigerant in the indoor units that are not turned on does not participate in the system circulation. At this time, the compressor reduces the frequency according to the number of indoor units in operation, which is beneficial to energy consumption. In heating mode, all indoor units are turned on, and the compressor frequency is F. If one indoor unit is turned off, the compressor frequency F1 = (Pn-Px1) / Pn×F. If two indoor units are turned off, the compressor frequency F2 = (Pn-Px1-Px2) / Pn×F. By analogy, the fewer the number of indoor units in operation, the lower the compressor frequency and the lower the energy consumption.

[0073] (3) When the heating mode enters defrosting, all solenoid valves are opened to the maximum opening, all expansion valves are opened, the compressor enters the defrosting frequency, and all indoor units participate in defrosting. When the defrosting mode exits, the solenoid valves of the indoor units that do not participate in heating are closed.

[0074] (4) In cooling mode, all solenoid valves are open.

[0075] In a specific implementation process, in the cooling mode, the expansion valve of the indoor unit that cannot be opened can be closed, while the solenoid valves can remain fully opened.

[0076] (5) In standby or power-off state, the solenoid valve is closed by default.

[0077] It should be pointed out that although the various steps in the above embodiments are described in a specific order, those skilled in the art can understand that in order to achieve the effects of the present invention, different steps do not have to be performed in such an order. They can be performed simultaneously (in parallel) or in other orders. These changes are within the scope of protection of the present invention.

[0078] It is understood by those skilled in the art that the present invention implements all or part of the processes in the method of the above embodiment, and can also be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned various method embodiments when executed by the processor. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable storage medium may include: any entity or device, medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory, random access memory, electric carrier signal, telecommunication signal and software distribution medium that can carry the computer program code. It should be noted that the content contained in the computer-readable storage medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable storage media do not include electric carrier signals and telecommunication signals.

[0079] Furthermore, the present invention also provides a control device for a multi-connection system.

[0080] See attached Figure 3 , Figure 3 FIG. 1 is a main structural block diagram of a control device of a multi-connection system according to an embodiment of the present invention. Figure 3 As shown, the control device of the multi-connection system in the embodiment of the present invention may include a processor 31 and a storage device 32.

[0081] The storage device 32 may be configured to store a program for executing the control method of the multi-split system of the above method embodiment, and the processor 31 may be configured to execute the program in the storage device 32, which includes but is not limited to the program for executing the control method of the multi-split system of the above method embodiment. For ease of explanation, only the part related to the embodiment of the present invention is shown. For specific technical details not disclosed, please refer to the method part of the embodiment of the present invention. The control device of the multi-split system may be a control device formed by various electronic devices.

[0082] In a specific implementation process, the number of the storage device 32 and the processor 31 can be multiple. The program for executing the control method of the multi-split system of the above method embodiment can be divided into multiple subprograms, and each subprogram can be loaded and run by the processor 31 to execute different steps of the control method of the multi-split system of the above method embodiment. Specifically, each subprogram can be stored in different storage devices 32, and each processor 31 can be configured to execute the program in one or more storage devices 32 to jointly implement the control method of the multi-split system of the above method embodiment, that is, each processor 31 executes different steps of the control method of the multi-split system of the above method embodiment to jointly implement the control method of the multi-split system of the above method embodiment.

[0083] The above-mentioned multiple processors 31 may be processors deployed on the same device. For example, the above-mentioned device may be a high-performance device composed of multiple processors, and the above-mentioned multiple processors 31 may be processors configured on the high-performance device. In addition, the above-mentioned multiple processors 31 may also be processors deployed on different devices. For example, the above-mentioned device may be a server cluster, and the above-mentioned multiple processors 31 may be processors on different servers in the server cluster.

[0084] Furthermore, the present invention also provides a computer-readable storage medium. In a computer-readable storage medium embodiment according to the present invention, the computer-readable storage medium can be configured to store a program for executing the control method of the smart home device of the above-mentioned method embodiment, and the program can be loaded and run by the processor to implement the control method of the above-mentioned multi-connected system. For ease of explanation, only the parts related to the embodiment of the present invention are shown. For specific technical details not disclosed, please refer to the method part of the embodiment of the present invention. The computer-readable storage medium can be a storage device formed by various electronic devices. Optionally, the computer-readable storage medium in the embodiment of the present invention is a non-temporary computer-readable storage medium.

[0085] Further, it should be understood that since the setting of each module is only for illustrating the functional units of the device of the present invention, the physical devices corresponding to these modules may be the processor itself, or a part of the software in the processor, a part of the hardware, or a part of the combination of software and hardware. Therefore, the number of each module in the figure is only schematic.

[0086] Those skilled in the art will appreciate that the modules in the device can be adaptively split or merged. Such splitting or merging of specific modules will not cause the technical solution to deviate from the principle of the present invention, and therefore, the technical solutions after splitting or merging will fall within the protection scope of the present invention.

[0087] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A control method for a multi-link system, characterized in that: include: If it is detected that at least one indoor unit in the multi-connected system is in a shutdown state, the adjustment capability of each indoor unit in the shutdown state is obtained; According to the regulation capacity of each indoor unit in the shutdown state under the current environmental regulation mode of the multi-split system, the operating frequency of the compressor is adjusted to the target frequency, and at least the upstream control valve connected to the indoor unit in the shutdown state is closed; wherein the upstream control valve is the control valve connected to the indoor unit in the shutdown state through which the refrigerant first flows under the current environmental regulation mode of the multi-split system.

2. The control method of the multi-link system according to claim 1, characterized in that: According to the regulation capability of each indoor unit in the shutdown state in the current environment regulation mode of the multi-split system, the operating frequency of the compressor is adjusted to the target frequency, including: Input the adjustment capacity of each indoor unit in the shutdown state into the following calculation formula to obtain the target frequency of the compressor; Wherein, the calculation formula is as follows: Among them, F1 represents the target frequency, P n Indicates the total adjustment capacity of all indoor units in the current environment adjustment mode of the multi-connected system, P xi It represents the regulating capacity of the indoor unit in the i-th shutdown state, and F represents the frequency of the compressor when all indoor units are in the running state.

3. The control method of a multi-link system according to claim 1, characterized in that: Also includes: If it is detected that the multi-split system enters the defrost mode, all control valves connected to the indoor units are controlled to open, and the operating frequency of the compressor is adjusted to the defrost frequency.

4. The control method of a multi-link system according to claim 1, characterized in that: At least close the upstream control valve connected to the indoor unit in the shutdown state, including: Close only the upstream control valve connected to the stopped indoor unit; or, At the same time, close the upstream control valve connected to the indoor unit in the stopped state and the downstream control valve connected to the indoor unit in the stopped state; The downstream control valve is a control valve connected to an indoor unit in a shutdown state and through which the refrigerant flows in the current environmental adjustment mode of the multi-split system.

5. The control method of a multi-link system according to claim 1, characterized in that: Also includes: Get the total refrigerant flow of the indoor units in operation; If the total refrigerant flow rate is less than a preset threshold, at least one indoor unit in a stopped state is selected from all indoor units in a stopped state as a target indoor unit, and a control valve connected to each target indoor unit is opened.

6. The control method of the multi-link system according to claim 5, characterized in that: At least one indoor unit in a stopped state is selected from all indoor units in a stopped state as a target indoor unit, including: Based on the time of entering the shutdown state, at least one indoor unit in the shutdown state is selected in order from the latest to the earliest time of entering the shutdown state as the target indoor unit.

7. The control method of the multi-link system according to claim 5, characterized in that: Also includes: If the total refrigerant flow is greater than or equal to a preset threshold, a fault prompt message indicating that the control valve is not closed is output.

8. A control device for a multi-connection system, characterized in that: The method comprises a processor and a storage device, wherein the storage device is suitable for storing a plurality of program codes, and the program codes are suitable for being loaded and run by the processor to execute the control method of the multi-connected system according to any one of claims 1 to 7.

9. A multi-link system, characterized in that: Comprising the control device of the multi-connection system as claimed in claim 8.

10. A computer-readable storage medium, characterized in that: A plurality of program codes are stored therein, and the program codes are suitable for being loaded and run by a processor to execute the control method of the multi-connected system according to any one of claims 1 to 7.

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