Networking communication method, device and system for single-machine multi-control

Abstract

The application provides a unit machine one control multi networking communication method, device and system, the method comprises the following steps: setting the address of the inner machine and the outer machine of each unit machine system; the inner machine address of the nth set of unit machine system is n, the outer machine address is Fn, and n is a positive integer; selecting the outer machine of any unit machine system as the master device to initiate communication, and the master device sequentially replies data according to the address sequence number of the inner machine, the inner machine and the outer machine of each unit machine system and the line controller; when the control instruction of the user is obtained through the line controller, the control instruction is sent to the communication network to trigger each unit machine system to execute the control instruction. In the case of not increasing the cost and hardware upgrade, the embodiment of the application realizes the networking of multiple sets of unit machine systems only through the optimization of the software mechanism, meets the one control multi demand of the user, and is convenient and fast to operate.

Description

Technical Field

[0001] This invention relates to the field of unit control technology, and more specifically, to a networking communication method, device, and system for one unit to control multiple units. Background Technology

[0002] Unitary air conditioners, a type of commercial air conditioner including ceiling-mounted, ducted, floor-standing, and wall-mounted units, are widely used in both residential and commercial settings, such as homes, hotels, shopping malls, and supermarkets. The trend of commercial air conditioning expanding into residential scenarios reflects the growing popularity of consumer upgrades. The 485 wired controller, serving as the human-machine interface for unitary air conditioners, offers advantages such as easy installation, low risk of loss, no need for battery replacements (unlike remote controls), and diverse functions and displays, making it suitable for a wide range of applications.

[0003] Currently, the outdoor unit, indoor unit, and wired controller are all on the same 485 communication network. The outdoor unit acts as the master device, and the others as slave devices. This communication mechanism makes it impossible to directly implement the function of one wired controller controlling multiple unit systems. There are currently two methods to achieve this: 1. Add gateways: Add a communication gateway to each unit system, and then connect all the gateways to the central controller. Finally, the central controller realizes unified control of all unit systems. 2. Add another 485 communication network: Establish a secondary 485 communication network between the wired controller and the indoor unit, and then connect the secondary 485 communication networks of all the units together to realize the function of one wired controller controlling multiple indoor units; The above two methods of controlling multiple targets have the following drawbacks: 1. Adding gateways and centralized controllers not only significantly increases costs but also complicates wiring and centralized control operations; 2. Adding secondary 485 communication requires hardware modifications and increases the resource consumption of the UART (Universal Asynchronous Receiver-Transmitter) chip (increasing chip costs), while also making engineering wiring more complex. Summary of the Invention

[0004] To address the aforementioned issues, this invention provides a network communication method for one-to-many unit control, where multiple unit systems are connected via a communication network. A wired controller is connected to the communication port of the indoor unit of any of the unit systems. The method includes: setting the addresses of the indoor and outdoor units of each unit system; the indoor unit address of the nth unit system is n, and the outdoor unit address is Fn, where n is a positive integer; selecting the outdoor unit of any unit system as the master device to initiate communication; the master device, the corresponding indoor unit, the indoor and outdoor units of the other unit systems, and the wired controller sequentially reply with data according to their address numbers; when the wired controller receives a user's control command, it sends the control command to the communication network to trigger each unit system to execute the control command.

[0005] The networking communication method for one-to-many unit control provided in this embodiment of the invention enables networking of multiple unit systems through software mechanism optimization without increasing costs or hardware upgrades, thus meeting users' one-to-many control needs. The method is convenient and quick to operate.

[0006] Optionally, the method further includes: if any of the internal or external units of the unit system fails to reply with data after a preset number of communication cycles, or if any of the unit systems cancels group control, then the corresponding internal or external unit of the unit system is triggered to stop sending data.

[0007] In this embodiment of the invention, considering the possibility of the unit machine system going offline or canceling one-to-many control, corresponding optimization steps for the communication mechanism are also provided.

[0008] Optionally, the method further includes: if the communication between the outdoor unit or the indoor unit of the unit system with the outdoor unit as the master device is abnormal, then the outdoor unit of the unit system adjacent to the unit system will be used as the master device to initiate communication.

[0009] In this embodiment of the invention, if the communication of the unit system acting as the master device is abnormal, the external unit of the adjacent unit system can be used as the master device to initiate communication. After the master device goes offline, the communication between the systems can be readjusted.

[0010] Optionally, the address of the external unit of the master device is F1, and the address of the internal unit corresponding to the master device is 1; the step of selecting any external unit of the unit system as the master device to initiate communication, the internal unit corresponding to the master device, the internal and external units of the other unit systems, and the wired controller reply with data in sequence according to the address number, including: communication is performed in the cycle of F1 external unit → 1# internal unit → wired controller → F2 external unit → 2# internal unit ... → Fn external unit → n# internal unit → F1 external unit.

[0011] In this embodiment of the invention, communication addresses can be automatically adjusted and bound. Corresponding addresses are bound one-to-one between the indoor and outdoor units, enabling them to communicate with each other.

[0012] Optionally, the method further includes: the Fm outdoor unit sends data, and the m# indoor unit replies with data after an interval of A ms; the F(m+1) outdoor unit sends data after the Fm outdoor unit sends data after an interval of B ms and the communication network is idle for C ms.

[0013] In this embodiment of the invention, the communication timing between the internal and external units of each system is set, so that each internal and external unit can communicate independently without interfering with each other.

[0014] Optionally, the method further includes: if the communication between the F1 outdoor unit or the 1# indoor unit is abnormal, the main device is switched to the F2 outdoor unit; the wired controller replies with data after the 2# indoor unit replies with data after an interval of Ams.

[0015] In this embodiment of the invention, the system can be readjusted after the main device goes offline to enable communication between the various systems.

[0016] Optionally, the method further includes: if the n# internal unit or the Fn external unit has no data after more than Y rounds of communication, the corresponding Fn external unit or n# internal unit stops sending data; the F (n+1) external unit sends data after the F (n-1) external unit data interval B*(1+1 / D) ms and the communication network is idle for C ms.

[0017] In this embodiment of the invention, if the unit system of the non-master device of the outdoor unit goes offline or leaves the network, the subsequent unit system will adjust the data transmission timing accordingly to realize communication between the systems.

[0018] This invention provides a network communication device for one-to-many unit control, in which multiple unit systems are connected through a communication network. A wired controller is connected to the communication port of the indoor unit of any of the unit systems. The device includes: an address setting module for setting the addresses of the indoor and outdoor units of each unit system; the address of the indoor unit of the nth unit system is n, and the address of the outdoor unit is Fn, where n is a positive integer; a communication module for selecting the outdoor unit of any unit system as the master device to initiate communication, wherein the master device, the corresponding indoor unit, the indoor and outdoor units of other unit systems, and the wired controller reply with data sequentially according to the address sequence number; and a control module for sending the control command to the communication network to trigger each unit system to execute the control command when the user's control command is obtained through the wired controller.

[0019] This invention provides a unit network communication system, including a computer-readable storage medium storing a computer program and a processor, wherein the computer program is read and executed by the processor to implement the above-described method.

[0020] This invention provides a computer-readable storage medium storing a computer program, which is read and executed by a processor to implement the above-described method.

[0021] The unit-to-many networking communication device and unit-to-many networking communication system of the present invention can achieve the same technical effect as the above-mentioned unit-to-many networking communication method. Attached Figure Description

[0022] Figure 1 This is a flowchart illustrating the networking communication method of one unit controlling multiple units in an embodiment of the present invention; Figure 2 This is a schematic diagram of unit machine system address binding in an embodiment of the present invention; Figure 3 This is a schematic diagram of a network of multiple unit machines in an embodiment of the present invention; Figure 4 This is a schematic diagram illustrating the adjustments made after the main device system goes offline in an embodiment of the present invention; Figure 5 This is a flowchart illustrating the overall control process of a single-unit wired controller controlling multiple units in an embodiment of the present invention. Figure 6 This is a schematic diagram of a network communication device for one unit controlling many units, as described in an embodiment of the present invention. Detailed Implementation

[0023] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0024] This invention provides a method for one-to-many unit controller to control multiple unit systems. Based on the existing unit network, this method achieves the function of one controller controlling multiple unit systems without additional cost by upgrading the software mechanism.

[0025] For example, the addresses of the external and internal units of each unit system are bound one by one, and then the external unit with the smallest address is selected as the master device. Finally, the 485 communication lines of all unit systems are connected together, and the wired controller is connected to the 485 port of any of the internal units. By distinguishing the device communication addresses, timing, and function codes, the effect of multiple systems communicating without interference and the wired controller controlling multiple internal units at the same time can be achieved.

[0026] The system of the present invention comprises the following modules: Air conditioner outdoor unit: Located outdoors, it is responsible for the operation of components such as the outdoor unit compressor to achieve cooling / heating effects. It can start and stop the unit by receiving commands and status from the indoor unit. Air conditioner indoor unit: Located indoors, it is responsible for the operation of components such as the indoor unit fan, and receives control commands from user terminals (remote controller, wired controller, etc.), such as on / off, mode, temperature, etc., while synchronizing user commands and status to the outdoor unit and wired controller.

[0027] Wired controller: Located indoors, usually installed on the wall, it is a human-machine interface control terminal that uses touch buttons to issue commands such as turning the device on and off.

[0028] Figure 1 This diagram illustrates a schematic flowchart of a network communication method for one-to-many unit control according to an embodiment of the present invention. Multiple unit systems are connected through a communication network, and a wired controller is connected to the communication port of the internal unit of any unit system. The method includes the following steps: S102 sets the addresses of the internal and external units of each unit system. The internal address of the nth unit system is 'n', and the external address is 'Fn', where n is a positive integer.

[0029] After connecting all the communication lines of the unit systems, assign corresponding addresses to the indoor and outdoor units of each unit system. For example, the indoor address of the first unit system is 1, and the outdoor address is F1; the indoor address of the second unit system is 2, and the outdoor address is F2; ​​the indoor address of the nth unit system is n, and the outdoor address is Fn. Therefore, the communication addresses can be automatically adjusted and bound. The corresponding addresses of the indoor and outdoor units are bound one-to-one, enabling them to communicate with each other.

[0030] S104, the outdoor unit of the unit system connected to the wired controller in the above-mentioned unit system initiates communication as the master device. The master device responds with data to the indoor unit, the indoor and outdoor units of other unit systems, and the wired controller in sequence according to the address number.

[0031] Select one of the multiple unit systems and designate its outdoor unit as the master device. For example, select the outdoor unit of the unit system connected to the wired controller as the master device to initiate communication.

[0032] For example, the address of the outdoor unit of the master device is F1, and the address of the corresponding indoor unit of the master device is 1. The wired controller is connected to the communication port of the indoor unit of the master device, and communication can be performed in the following order: F1 outdoor unit → 1# indoor unit → wired controller → F2 outdoor unit → 2# indoor unit... → Fn outdoor unit → n# indoor unit → F1 outdoor unit. The networking of multiple unit systems is completed by replying to data in the above cycle.

[0033] For example, this embodiment sets the communication timing between the internal and external units of each system, enabling each internal and external unit to communicate independently without interference. Specifically, the following applies: External unit Fm sends data, and internal unit m# replies with data after an interval of A ms; External unit F(m+1) sends data after external unit Fm sends data after an interval of B ms and the communication network is idle for C ms. Between internal and external units within the same unit system, the internal unit replies with data after the external unit sends data after a certain interval. Between different unit systems, the next external unit sends data after an interval of a certain interval and the communication bus is idle for a certain period.

[0034] S106: When the user's control command is obtained through the wired controller, the control command is sent to the communication network to trigger each unit system to execute the control command.

[0035] When a user operates any button such as power on / off, mode, or fan speed via the wired controller, the controller sends data to the connected indoor unit and then sends the control command to the communication network. Each indoor unit receives and executes the command, achieving the effect of controlling multiple units from a single device.

[0036] The networking communication method for one-to-many unit control provided in this embodiment of the invention enables networking of multiple unit systems through software mechanism optimization without increasing costs or hardware upgrades, thus meeting users' one-to-many control needs. The method is convenient and quick to operate.

[0037] Considering the possibility of the unit system going offline or canceling one-to-many control, this embodiment also provides corresponding optimization steps for the communication mechanism. Based on this, the method further includes: if any unit system's internal or external unit fails to reply with data after a preset number of communication cycles, or if any unit system cancels group control, then the corresponding unit system's internal or external unit is triggered to stop sending data.

[0038] If the communication between the outdoor unit or the indoor unit of a unit system with the outdoor unit as the master device is abnormal, the outdoor unit of the unit system adjacent to the unit system will initiate communication as the master device.

[0039] Taking the F1 outdoor unit as the main device as an example, if communication between the F1 outdoor unit or the #1 indoor unit is abnormal, the main device will be moved to the adjacent F2 outdoor unit. Accordingly, the communication sequence will be adjusted: after the F2 outdoor unit sends data, the #2 indoor unit will reply with data, and the wired controller will reply with data after the #2 indoor unit replies with data, spaced an ampere of 1 second. Based on this method, communication between the systems can be restored after the main device goes offline.

[0040] Taking the offline or network exit of a non-master unit system as an example, the subsequent unit systems will adjust their data transmission timing accordingly. For instance, if the n# indoor unit or the Fn outdoor unit has no data after more than Y communication cycles, the corresponding Fn outdoor unit or n# indoor unit will stop transmitting data; and the F(n+1) outdoor unit will transmit data after the F(n-1) outdoor unit data interval B*(1+1 / D) ms and the communication network is idle for C ms.

[0041] The following details the process of using a unit-type wired controller to control multiple devices, specifically including: Step 1: Binding internal and external machine addresses of a single system: For example, for n unit machine systems, set the internal machine address of each system to 1, 2, ..., n respectively. Then, power on each system individually. After X rounds of normal communication, the external machine address is adjusted from F1 to F1, F2, ..., Fn respectively. Both internal and external machine addresses are stored in the chip and can be restored after power failure. Figure 2 A schematic diagram of unit machine system address binding is shown.

[0042] The X value can be adjusted according to the actual situation, and a value of 10 to 20 is recommended.

[0043] Step 2, Networking of Multiple Systems: Connect the internal and external 485 communication lines of the above n unit systems together. Figure 3 A diagram illustrating a network of multiple unit machines is shown. Upon power-up, the outdoor unit with address F1 is designated as the master device to initiate communication. Communication is achieved in a cycle: F1 outdoor unit → 1# indoor unit → wired controller → F2 outdoor unit → 2# indoor unit… → Fn outdoor unit → n# indoor unit → F1 outdoor unit.

[0044] For example, when the outdoor unit Fm sends data, the indoor unit m# replies with data after an interval of A ms. The same applies to the wired controller. The outdoor unit F_(m+1) sends data after the outdoor unit Fm sends data after an interval of B ms and the 485 bus is idle for C ms, and so on. Among them, the recommended value for A is 10, the recommended value for B is 100, and the recommended value for C is 10. These values ​​can be adjusted according to the actual situation.

[0045] Step 3, User One-to-Many Commands: When the user operates any button such as power on / off, mode, fan speed, etc., the wired controller sends data from indoor unit #1 and then sends the control command to the 485 network. Indoor units #1 to #n receive the command and execute it, achieving the effect of one-to-many control.

[0046] Step 4: Indoor or outdoor unit disconnection: After networking, if indoor unit n# or outdoor unit Fn has no data after more than Y rounds of communication, the corresponding outdoor unit Fn or indoor unit n# will stop sending data. Outdoor unit F(n+1) will send data after the data interval of outdoor unit F(n-1) is B*(1+1 / D)ms and the 485 bus is idle for Cms. If outdoor unit F1 or indoor unit 1# has communication problems, the master device will be switched to outdoor unit F2 (if power is interrupted, proceed from step 2), and so on. The wired controller will reply with data after the indoor unit with the smallest address has sent data for an interval of Ams. Figure 4 A schematic diagram showing the adjustments made after the main equipment system goes offline is shown.

[0047] The recommended value for Y is 30-50, and the recommended value for D is 3, which can be adjusted according to the actual situation.

[0048] Step 5: Cancel one-to-many control for some units: After networking, if one or more units need to cancel one-to-many control, i.e., implement one-to-one control independently, then disconnect the 485 network connection of the corresponding unit and connect it to a separate wired controller. For optimization of the communication mechanism, refer to Step 4.

[0049] Figure 5 This invention illustrates the overall control flowchart of a unit-to-many controller in an embodiment of the present invention, which includes the following steps: S501, power on.

[0050] S502, internal address settings 1-n.

[0051] S503, X-wheel communication.

[0052] S504, the external unit address changes to F1-Fn.

[0053] S505, 485 communication connection networking.

[0054] S506, F1 outdoor unit sends communication data at time T0.

[0055] S507, No. 1 indoor unit T0+Ams reply data.

[0056] S508, the wired controller returns data after T0+2Ams.

[0057] S509, F2 outdoor unit T0+Bms after bus idle Cms reply data.

[0058] S510, after the outdoor unit T0+B*(n-1)ms and the bus is idle for Cms, data is replied.

[0059] S511: Determine if unit m's system is offline or if group control has been canceled. If yes, proceed to S512; otherwise, return to S506.

[0060] S512, Fm-1 outdoor unit T0+B*(m-2)ms after bus idle Cms reply data.

[0061] S513, after Fm+1 outdoor unit T0+B*(m-1+1 / D)ms and the bus is idle for Cms, data is replied.

[0062] This invention provides a method for networking multiple unit machines under one control. Without increasing costs or upgrading hardware, it achieves networking of multiple unit machine systems solely through software mechanism optimization, meeting users' needs for one-to-many control in a convenient and fast manner.

[0063] Specifically, by automatically adjusting and binding communication addresses, multiple units can connect to the same 485 network, while the internal and external units can communicate independently without interfering with each other. Furthermore, through timing optimization, the goal of maximizing the number of connected devices and achieving optimal communication efficiency is achieved.

[0064] Figure 6 This diagram illustrates a network communication device for one-to-many unit control according to an embodiment of the present invention. Multiple unit systems are connected via a communication network, and a wired controller is connected to the communication port of any of the unit systems. The device includes: Address setting module 601 is used to set the addresses of the internal and external units of each unit system; the internal address of the nth unit system is n, and the external address is Fn, where n is a positive integer; Communication module 602 is used to select any of the outdoor units of the unit system as the master device to initiate communication. The master device corresponds to the indoor unit, and the indoor and outdoor units and wired controllers of the other unit systems reply with data in sequence according to the address number. The control module 603 is used to send the control command to the communication network when it receives the user's control command through the wired controller, so as to trigger each of the unit systems to execute the control command.

[0065] The networking communication device for one-to-many unit control provided in this embodiment of the invention enables networking of multiple unit systems without increasing costs or upgrading hardware, solely through software mechanism optimization, thus meeting users' one-to-many control needs. It is convenient and quick to operate.

[0066] As a feasible method, the communication module is also used to: if any of the internal or external units of the unit system fails to reply with data after a preset number of communication cycles, or if any of the unit systems cancels group control, trigger the corresponding internal or external unit of the unit system to stop sending data.

[0067] As a feasible method, the communication module is also used to: if the communication between the outdoor unit or the indoor unit of the unit system with the outdoor unit as the main device is abnormal, initiate communication by using the outdoor unit of the unit system adjacent to the unit system as the main device.

[0068] As a feasible approach, the address of the external unit of the master device is F1, and the address of the internal unit corresponding to the master device is 1; the communication module is also used to perform communication according to the cycle of F1 external unit → 1# internal unit → wired controller → F2 external unit → 2# internal unit ... → Fn external unit → n# internal unit → F1 external unit.

[0069] As a feasible method, the communication module is also used for: the Fm outdoor unit sending data, and the m# indoor unit replying with data after an interval of A ms; the F(m+1) outdoor unit sending data after the Fm outdoor unit sends data after an interval of B ms and the communication network is idle for C ms.

[0070] As a feasible method, the communication module is also used to: if the communication between the F1 outdoor unit or the 1# indoor unit is abnormal, the main device is switched to the F2 outdoor unit; the wired controller replies with data after the 2# indoor unit replies with data at an interval of A ms.

[0071] As a feasible method, the communication module is also used to: if the n# internal unit or the Fn external unit has no data after more than Y rounds of communication, the corresponding Fn external unit or n# internal unit stops sending data; the F (n+1) external unit sends data after the F (n-1) external unit data interval B*(1+1 / D) ms and the communication network is idle for C ms.

[0072] This invention also provides a unit network communication system, including a computer-readable storage medium storing a computer program and a processor, wherein the computer program is read and executed by the processor to implement the above method.

[0073] This invention also provides a computer-readable storage medium storing a computer program. When the computer program is read and executed by a processor, it implements the method provided in the above embodiments and achieves the same technical effect. To avoid repetition, further details are omitted here. The computer-readable storage medium may be a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0074] Of course, those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by computer-controlled devices. The program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the above method embodiments. The storage medium can be a memory, a disk, an optical disk, etc.

[0075] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

[0076] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0077] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A network communication method for one-to-many unit control, characterized in that, Multiple unit systems are connected via a communication network, and a wired controller is connected to the communication port of the indoor unit of any of the unit systems. The method includes: Set the addresses of the internal and external units of each of the aforementioned unit systems; the internal address of the nth unit system is n, and the external address is Fn, where n is a positive integer; The host device selects the outdoor unit of any of the aforementioned unit systems as the master device to initiate communication. The master device, the corresponding indoor unit, the indoor and outdoor units of the other aforementioned unit systems, and the wired controller reply with data in sequence according to the address number. When the control command from the user is obtained through the wired controller, the control command is sent to the communication network to trigger each of the unit systems to execute the control command; If any of the unit systems fails to reply with data after a preset number of communication cycles, or if any of the unit systems cancels group control, then the corresponding unit system's internal or external unit will be triggered to stop sending data. If the communication between the outdoor unit or the indoor unit of the unit system, which is the main device, is abnormal, the outdoor unit of the unit system adjacent to the main device will initiate communication.

2. The method as described in claim 1, characterized in that, The external unit address of the master device is F1, and the internal unit address corresponding to the master device is 1; when selecting any of the external units of the unit system as the master device to initiate communication, the internal unit corresponding to the master device, the internal and external units of the other unit systems, and the wired controller reply with data in sequence according to the address number, including: Communication follows the cycle of F1 outdoor unit → 1# indoor unit → wired controller → F2 outdoor unit → 2# indoor unit... → Fn outdoor unit → n# indoor unit → F1 outdoor unit.

3. The method as described in claim 2, characterized in that, The method further includes: The outdoor unit (Fm) sends data, and the indoor unit (m#) replies with data after an interval of A ms. The F(m+1) outdoor unit sends data after an interval of B ms following the data transmission of the Fm outdoor unit, and after the communication network has been idle for C ms.

4. The method as described in claim 2, characterized in that, The method further includes: If the communication between the F1 outdoor unit or the #1 indoor unit is abnormal, the main equipment will be switched to the F2 outdoor unit; accordingly, the communication sequence will be adjusted so that after the F2 outdoor unit sends data, the #2 indoor unit will reply with data. The wired controller replies with data after the indoor unit #2 has a data interval of A ms.

5. The method as described in claim 1, characterized in that, The method further includes: If no data is received after more than Y communication cycles for either the n# internal unit or the Fn external unit, and n≥2, then the corresponding Fn external unit or n# internal unit will stop sending data. After the external unit F(n+1) sends data, it sends data again after an interval of B*(1+1 / D) ms and the communication network is idle for C ms.

6. A network communication device for one-to-many unit control, characterized in that, Multiple unit systems are connected via a communication network, and a wired controller is connected to the communication port of the indoor unit of any one of the unit systems. The apparatus for implementing the method according to any one of claims 1-5 includes: The address setting module is used to set the addresses of the internal and external units of each of the unit systems; the internal address of the nth unit system is n, and the external address is Fn, where n is a positive integer; The communication module is used to select any of the outdoor units of the unit systems as the master device to initiate communication. The master device corresponds to the indoor unit, and the indoor and outdoor units and wired controllers of the other unit systems reply with data in sequence according to the address number. The control module is used to send the control command to the communication network when it receives the user's control command through the wired controller, so as to trigger each of the unit systems to execute the control command.

7. A unit-based network communication system, characterized in that, The method includes a computer-readable storage medium storing a computer program, which is read and executed by the processor to implement the method as described in any one of claims 1-5.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when read and executed by a processor, implements the method as described in any one of claims 1-5.

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