Wireless individual control system and method for multiple large ceiling fans using smartphone

Abstract

The present invention relates to a control technology for large ceiling fans, and more specifically, to a wireless-based individual control system for large ceiling fans and a control method thereof that improves user convenience and control efficiency by enabling wireless control of a plurality of large ceiling fans installed in an indoor high-ceiling space using a smartphone. That is, in a system for individually wirelessly controlling multiple large ceiling fans, A control box connected to each of a plurality of large ceiling fans installed in a high ceiling and performing on / off control and airflow adjustment of the respective ceiling fans; a router connected to the control box via a wired connection and receiving control commands or transmitting status information via wireless Zigbee communication; a gateway connected to a plurality of the routers via wireless Zigbee communication and performing wireless TCP / IP communication with a cloud server; a smartphone configured to enable wireless communication with the gateway based on TCP / IP and having an application installed that can generate individual control commands for a plurality of ceiling fans and check the fan status in real time; and a cloud server that relays commands between the smartphone and the gateway and collects fan status data, wherein a control command input from the smartphone is transmitted to the gateway via the cloud server, and the gateway transmits the control command to the corresponding router via Zigbee, and the router controls the corresponding ceiling fan through the control box.

Description

Technology Field

[0001] The present invention relates to a control technology for large ceiling fans, and more specifically, to a wireless-based individual control system for large ceiling fans and a control method thereof that improves user convenience and control efficiency by enabling wireless control of a plurality of large ceiling fans installed in an indoor high-ceiling space using a smartphone.

[0002] More specifically, the invention relates to an IoT-based smart control technology configured to enable remote control of multiple ceiling fans individually, such as turning them on / off and controlling airflow, by connecting control boxes connected to each large ceiling fan to a gateway via a router using the Zigbee method, and by connecting the gateway to a smartphone app via a cloud server.

[0003] Furthermore, the present invention improves the convenience of installation and maintenance by including a function that allows Zigbee network configuration to be performed via a DIP switch in the gateway and router devices, the configuration to be stored in an EEPROM, and initialization via a reset switch. The router supports the RS-485-based MODBUS RTU protocol to enable wired connectivity with the controller (EM30), and is configured to allow detailed control of the fan by being equipped with various input / output ports. Background Technology

[0005] Large ceiling fans are widely used in large spaces with high ceilings, such as modern industrial sites, logistics centers, gymnasiums, public offices, religious facilities, and exhibition halls, to ensure smooth indoor air circulation and temperature control. In particular, demand for them has been continuously increasing recently as a means to simultaneously achieve energy savings and a comfortable working environment.

[0006] Since these large ceiling fans typically have blade diameters reaching several meters and are installed in spaces with ceiling heights of 4 meters or more, direct user access to turn the fan on and off or adjust the wind speed is physically restricted. Consequently, in existing systems that use manual control methods or fixed control panels, there was serious inconvenience in real-time control or fault response after installation.

[0007] In conventional technology, multiple fans were generally controlled collectively using a wired remote control or a dedicated control panel installed on a wall or floor, or manually operated using a dial-type setting.

[0008] However, this method had a problem in that when multiple fans were placed significantly spaced apart within a large space, it was impossible to control each fan individually, or even if possible, the process was complex and cumbersome.

[0009] Furthermore, large ceiling fans may experience a decrease in airflow or malfunction after a certain period of time during use; however, conventional technology had a structural limitation in that it was difficult to check the status or error status of individual fans in real time, requiring manual inspection only after a problem occurred.

[0010] Furthermore, along with the recent advancements in smart factories, IoT technology, and mobile devices, user demand is shifting beyond simple power control to intelligent systems that integrate with smartphone apps to control individual fans in real-time, monitor fan status, and remotely identify malfunctions or error messages anytime and anywhere. However, to date, integrated and practical solutions capable of satisfying these demands have not been sufficiently implemented in the large ceiling fan sector.

[0011] Zigbee-based wireless communication technology is widely adopted as an efficient communication infrastructure for IoT devices based on its characteristics of low power consumption, short-to-medium range, and ease of mesh network configuration. Although this technology offers significant advantages in terms of state transmission, command reception, and control signal distribution among multiple devices, conventional large-scale ceiling fan systems have faced technical limitations in individual communication between fans, multi-control, and cloud-based integrated monitoring due to the failure to adopt this Zigbee-based router-gateway structure.

[0012] Consequently, there is an urgent need for a new technology that can dramatically improve control convenience and maintenance efficiency by enabling control of multiple large ceiling fans installed at high altitudes and difficult to access directly via smartphone, individually checking the status of each fan in real time, wirelessly setting airflow, direction, and power status, and further providing error messages to the user via a cloud server in the event of an error.

[0013] Accordingly, the present invention aims to implement a system capable of real-time fan control and error response through bidirectional communication between a smartphone-based app and an AWS cloud server, by establishing a fan control infrastructure based on a Zigbee mesh network and providing gateway and router devices including DIP switches and EEPROM storage functions to simplify field configuration and maintenance. Prior art literature

[0015] Patent Document 1: Korean Patent Publication No. 10-2025-003020010 Patent Document 2: Korean Patent Registration No. 10-2590181 The problem to be solved

[0016] The purpose of this invention is to maximize the accessibility and efficiency of control by enabling multiple large ceiling fans installed on high ceilings to be individually and wirelessly controlled via a smartphone, rather than using conventional wired remote controls or integrated switches.

[0017] Due to the nature of large ceiling fans being distributed across large indoor spaces such as factories, logistics centers, and gymnasiums, the spacing between fans is very large, and they are often installed at high positions out of reach. Consequently, direct access to individual fans is difficult, and there were limitations in immediately identifying malfunctions or requesting repairs when they occurred.

[0018] Conventionally, it was common practice to turn multiple fans on or off simultaneously using a single control panel or remote control; however, this structure was impractical in that it could not individually adjust the wind speed, rotation status, or operating time of each fan according to user needs, nor could its status be monitored in real time.

[0019] Furthermore, it was impossible to immediately identify faulty fans, and the management efficiency of the entire system was low; in environments with many fans, these problems accumulated, inevitably leading to a significant decrease in operational efficiency.

[0020] Therefore, the present invention aims to implement a structure that enables remote control of high-ceiling fans without the need for movement of workers by allowing a user to check the status of the fans in real time through a dedicated app installed on a smartphone and to selectively control the fans individually or in groups, and at the same time, collects fan status or error information based on the cloud and automatically provides error messages to the user terminal, thereby enabling immediate recognition of whether a malfunction has occurred or the need for inspection and prompt response to maintenance.

[0021] Furthermore, the technical problem that this invention aims to solve is to enable stable simultaneous connection and individual control of multiple fans even in indoor environments with significant communication distance constraints by utilizing a Zigbee-based mesh network for communication between ceiling fans to ensure stability and scalability, and by configuring them to connect to a cloud server via a gateway and wirelessly link with a smartphone. means of solving the problem

[0023] The present invention aims to simultaneously solve the problem of physical access to fans installed in high ceilings, the inefficiency of individual control, and the difficulty of identifying faults by providing a smart control system configured to wirelessly control large ceiling fans individually via a smartphone.

[0024] To this end, the present invention is configured to connect a control box to each large ceiling fan via a wire, and to attach a router to the control box so as to receive and execute fan control commands.

[0025] These routers are connected to the gateway via wireless Zigbee, and the gateway interacts with the cloud server via TCP / IP-based wireless communication, enabling the entire control structure to be extended to a cloud-centric IoT environment.

[0026] A dedicated control application is installed on the user's smartphone, and through this app, the user can select multiple large ceiling fans simultaneously or individually and input various operation commands in real time, such as changing the power status or adjusting the wind speed.

[0027] The process is executed as follows: user control commands are transmitted from the smartphone to the cloud server, which forwards them to the gateway; the gateway then transmits Zigbee commands to the router connected to the fan, allowing the fan's control box to interpret the signals and operate the drive unit.

[0028] When the fan starts operating, its operating status is transmitted back to the router via the control box, and by feeding this back to the user's smartphone through the gateway and cloud server, the user can check in real-time on the app screen whether their command has been executed successfully.

[0029] In addition, if the system of the present invention is unable to execute commands due to a fan failure, lack of network connection, or sensor malfunction, the relevant information is automatically transmitted to a cloud server in the form of an error message and conveyed to the user via an app, thereby enabling rapid and systematic maintenance and inspection responses.

[0030] A single gateway is designed to communicate with up to 20 or more fans, so that all fans can be reliably connected and controlled within the wireless communication range even when multiple fans are widely spaced apart in a large space, and the distance between fans or the possibility of communication failure is minimized by applying a mesh network structure of the Zigbee protocol.

[0031] In terms of installation, each ceiling fan does not require a separate control line in addition to the existing power line; since only a control box and router need to be attached, installation is simple, and the system can be configured flexibly without affecting the existing system even when replacing fans or expanding in the future.

[0032] Meanwhile, the above gateway includes a DIP switch capable of setting a Zigbee network identification value (PAN ID) and a number of routers, and the set value is stored in an EEPROM, and can be configured to initialize the EEPROM value using a reset switch.

[0033] The above router is linked with a Zigbee module and can communicate with a controller via the RS-485-based MODBUS RTU protocol, and the router can be configured to include ports such as PWM output, ADC input, and GPIO input to precisely control the speed, direction, and status of the ceiling fan.

[0034] The above control system can recognize the type of fan controller based on product identification codes (F111, F112) and set the fan rotation speed by referring to the corresponding speed table.

[0035] The above gateway includes an ESP32 chip-based WiFi module and a Zigbee microcontroller, communicates with an AWS IoT cloud server via the MQTT protocol, and can receive commands from the server and transmit them to the router.

[0036] In addition, the above router and gateway devices can be configured to automatically configure a network based on DIP switch values ​​upon initial power application, and to register fan identification information based on registered MAC addresses in the cloud so that each fan can be logically distinguished and controlled by a user app.

[0037] Through this configuration, the present invention organically integrates a smartphone-based intuitive interface, command relay and status feedback via cloud connectivity, and a stable and scalable Zigbee-based wireless control network, thereby overcoming the limitations of existing manual or centralized control methods and realizing an intelligent control system capable of actively controlling multiple fans even in high-ceiling indoor spaces. Effects of the invention

[0039] According to the present invention, multiple large ceiling fans installed in high ceilings, which are difficult to reach by hand and spaced far apart from each other, can be individually controlled with a single smartphone. This allows the user to conveniently set or change the power, wind speed, and rotation direction of the ceiling fans without spatial constraints, and establishes an integrated management environment where the status of the fans can be checked in real time and maintenance can be performed when necessary.

[0040] In particular, a dedicated app installed on a smartphone acts as a central interface mediating between the user, the cloud server, and the fan at the site, allowing the user to select the fan they want, monitor its status, input control commands, and immediately check the results visually, thereby dramatically improving control convenience.

[0041] In addition, by installing a control box on each ceiling fan and connecting it to a Zigbee router, a network is formed that enables stable wireless control of multiple fans. Since these routers are connected to a gateway and communicate with smartphones via a cloud server, the stability and scalability of the system remain unaffected even if the number of fans or their installation locations change.

[0042] This structure ensures that control commands are accurately transmitted and fan responses are quickly delivered to the user, even in spaces with large spacing between fans or very high ceilings. Compared to conventional wired remotes or single control panel methods, this significantly improves the freedom and flexibility of control. In particular, a major advantage is that multiple fans can be connected simultaneously while each can be controlled independently, allowing different operating states to be set for each fan according to spatial requirements or airflow conditions.

[0043] In addition, if a failure occurs during fan operation or if problems such as communication failure or sensor malfunction arise, the relevant information is transmitted to the user's smartphone via a cloud server and clearly displayed as an error message in the app, thereby providing an active maintenance environment that allows for real-time identification and action at the time the problem occurs.

[0044] This resolves the conventional problem where users had to physically visit the site to visually inspect the system even when the power was off or the fan was not operating, and by including such fault response functions, the system simultaneously improves the overall facility's operating rate and management efficiency.

[0045] Furthermore, since the present invention eliminates the need to install a separate control line for fan control and enables control via wireless communication while maintaining only the power line, wiring work during installation can be minimized, and replacement, additional installation, or expansion of the fan is very easy, it offers high economic efficiency in terms of initial construction costs and long-term operating costs.

[0046] Since it is designed to accommodate up to 20 or more fans per gateway, sufficient scalability and flexibility of application can be secured in facilities such as medium-to-large logistics centers, manufacturing facilities, large sports halls, and exhibition halls. Additionally, the Zigbee protocol-based mesh network can automatically reconfigure communication paths between routers without a single point of failure, ensuring very high stability of the entire system.

[0047] Consequently, the present invention overcomes the limitations of existing control systems by enabling the convenient and intuitive individual control of multiple large ceiling fans distributed across high ceilings using a single user smartphone. By comprehensively improving communication stability, scalability, ease of maintenance, and user control convenience, it maximizes the effectiveness of ceiling fan operation and can be evaluated as a core technology capable of realizing the smart operation of industrial sites and large-space facilities.

[0048] Furthermore, the present invention includes specific hardware configuration functions for each component, thereby enabling users to configure and initialize the system more precisely according to the ceiling fan installation environment. The gateway and router each allow for easy configuration of information such as the Zigbee network PAN ID, number of routers, and group ID through an 8-channel DIP switch, and configuration values ​​stored in the internal EEPROM can be easily restored using an initialization function via a reset switch. As a result, installers or maintainers have the advantage of being able to quickly change settings to suit field conditions and automatically reconfigure the entire system.

[0049] In addition, fan control commands are processed on a cloud-based server via the MQTT protocol, enabling customized control for each device using speed control tables specific to the fan model (F111, F112, etc.). This provides higher precision and reliability compared to existing systems and allows fan rotation speed or direction settings to be automatically optimized according to the situation.

[0050] Users can monitor the status of each fan in real time via a smartphone app and clearly check error messages in the event of a malfunction or anomaly, while visual feedback at the site has also been enhanced through features such as message reception lamps and status lamps.

[0051] Above all, the present invention has verified through real-world testing a stable Zigbee communication range of approximately 45m between a gateway and a router, and a connection range of more than 60m between a WiFi router and a gateway, enabling the implementation of a highly reliable control system even in large-scale spaces. This structure is particularly suitable for large spaces with high ceilings, such as manufacturing sites, logistics centers, and large commercial facilities, and demonstrates excellent performance in terms of installation flexibility, operational reliability, and maintenance efficiency of the entire system. Brief explanation of the drawing

[0053] FIG. 1 is a sequence logic diagram showing the overall operation flow of a smart ceiling fan control system according to the present invention, and FIG. 2 is a block diagram schematically illustrating a wireless individual control system according to the present invention, and FIG. 3 is a block diagram schematically illustrating another embodiment of a wireless individual control system according to the present invention, and FIG. 4 is a block diagram of the module-by-module configuration of a wireless communication-based ceiling fan control system according to the present invention, and FIG. 4 is a block diagram showing the internal configuration of a gateway, which is a first part of the present invention, and FIG. 5 is a block diagram showing the internal configuration of a router, which is a first part of the present invention, and Figure 6 is a system connection diagram showing the interconnection flow between Zigbee, Gateway, Router, and Controller. Specific details for implementing the invention

[0054] Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings. However, it should be understood that the scope of the present invention is not limited thereto.

[0055] In this specification, the embodiments are provided to ensure that the disclosure of the invention is complete and to fully inform those skilled in the art of the scope of the invention, and the scope of the invention is defined only by the claims. Accordingly, in some embodiments, well-known components, well-known operations, and well-known techniques are not specifically described to avoid the invention being interpreted ambiguously.

[0056] The terms used herein are for describing embodiments and are by no means intended to limit the invention. In this specification, the singular form includes the plural form unless specifically stated otherwise in the text. Additionally, components and operations referred to as "comprising (or comprising)" do not exclude the presence or addition of one or more other components and operations.

[0057] Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings. However, the scope of the present invention is not limited thereto, and the embodiments described herein are intended to fully disclose the technical concept of the present invention and are provided to enable those skilled in the art to easily practice the present invention. Accordingly, the scope of the present invention is defined only by the claims. Furthermore, specific descriptions of known components, operations, and technologies are omitted to the extent that they do not hinder an understanding of the present invention.

[0058] The smart ceiling fan control system of the present invention is an IoT-based integrated control system configured to individually wirelessly control a plurality of large ceiling fans installed in a high-ceiling space using a smartphone, and its configuration and operation will be described in detail with reference to the attached drawings, FIGS. 1 to 3.

[0059] FIG. 1 is a logic diagram showing the sequence of the overall control flow according to the present invention,

[0060] The operation is initiated when the user inputs a command through a control app on a smartphone (15), and this command is transmitted to a cloud server (14) via Wi-Fi or a mobile network.

[0061] The cloud server (14) identifies a specific ceiling fan (10) that is the target of the command and sends a control message to the gateway (13) connected to the fan.

[0062] The gateway (13) transmits wireless commands to the router (12) of the ceiling fan (10) via the Zigbee protocol, the router (12) transmits a signal to the control box (11) connected via a wire, and the control box (11) executes the fan's rotation, wind speed control, power ON / OFF, etc. based on the received commands.

[0063] At the same time, the operation results or status information of the fan is fed back in reverse to the smartphone (15) through the router (12), gateway (13), and cloud server (14), and the user can check the current status or error message of the fan through the app screen.

[0064] FIG. 2 is a block diagram of the system configuration of the present invention, in which control boxes (11a)(11b)(11c) installed in each of a plurality of ceiling fans (10a)(10b)(10c) are wired to routers (12a)(12b)(12c), and these routers (12a)(12b)(12c) are linked to a central gateway (13) via Zigbee communication, the gateway (13) is connected to a cloud server (14) via Wi-Fi, and the cloud server (14) receives real-time commands and relays status information via wireless communication with a smartphone (15).

[0065] As seen here, each large ceiling fan (F1, F2, F3, ..., Fn) (10a) (10b) (10c) is equipped with an independent control box (11a) (11b) (11c), which is responsible for power switching and speed control of the corresponding fan.

[0066] Each control box (11a)(11b)(11c) is wired to a corresponding Zigbee router (12a)(12b)(12c), and the routers (12a)(12b)(12c) communicate wirelessly with the gateway (13) through a Zigbee mesh network.

[0067] The gateway (13) is connected to the internet network via an internal or public Wi-Fi environment and is responsible for relaying commands and providing status feedback through a connection with a cloud server (14).

[0068] The smartphone (15) wirelessly communicates with the cloud server (14) through an app-based UI and provides the ability to control multiple fans simultaneously or selectively control individual fans.

[0069] FIG. 3 is an example block diagram illustrating the application environment of the present invention, in which a plurality of large ceiling fans (10a)(10b)(10c) are spaced apart on a ceiling fixed structure, and a control box (11a)(11b)(11c) and a router (12a)(12b)(12c) are installed on each fan, and the structure for Zigbee communication between routers and linkage with a gateway, cloud server, and smartphone is depicted in a form similar to an actual usage environment, and the communication distance between fans, installation location, gateway communication range, etc. are visually shown.

[0070] FIG. 3 is a drawing showing another embodiment considering an actual installation environment, in which a plurality of ceiling fans (F1F5) (10a) (10b) (10c) are installed spaced apart at regular intervals on a high ceiling structure, and each fan is equipped with a control box (11a) (11b) (11c) and a router (12a) (12b) (12c), and a Zigbee communication module is built between the routers to form a mesh-type wireless network.

[0071] This structure enables reliable communication even in large indoor spaces where the spacing between fans is 1520m or more, and the gateway (13) manages this router network collectively and exchanges data with the cloud server (14).

[0072] In addition, the drawing specifies that 20 routers can be connected per gateway, allowing the number of fans to be flexibly adjusted according to the size of the facility.

[0073] In this system, each router is controlled independently, and mapping information based on MAC addresses or router IDs is stored in the cloud to identify the fan to be commanded. When a user selects a specific fan in the app, the ID of the router connected to that fan is looked up in the cloud, and based on this, command propagation occurs in the order of Gateway → Router → Fan.

[0074] If an abnormality occurs during operation of the fan, the control box transmits the error status to the router, and the information is transmitted in the order of Zigbee → Gateway → Cloud → Smartphone, and a message such as 'Fan 3 Error: Motor rotation abnormality' is displayed to the user in real time on the app.

[0075] In addition, the system of the present invention includes an automatic network configuration function after initial installation, so that each router automatically registers the location information of the fans it is connected to to the cloud through initial handshake with the gateway, and through this, the installer or manager can logically identify each fan in the app without a separate configuration process.

[0076] This process corresponds to the initial connection step and system configuration verification logic of Fig. 1, and after all equipment is connected, a 'success message' is sent from the cloud to the app to notify the user that the system is properly prepared.

[0077] Ultimately, the system of the present invention is configured so that all components operate in synchronization using only a wireless network without dedicated wiring for fan control, and enables real-time control and feedback, error detection, and maintenance. Furthermore, as illustrated in each drawing, the system configuration and operation flow are organized in steps, allowing users to achieve intuitive and efficient fan operation even in high-ceiling environments with significant physical constraints.

[0078] Meanwhile, as another preferred embodiment of the present invention, each wireless communication device, such as a gateway and a router, may include hardware and a configuration process as follows for more precise and stable operation.

[0079] The gateway serves as the central controller for a Zigbee-based wireless mesh network and is equipped with a control microcontroller (MCU), a Zigbee module, an ESP32 chipset for WiFi communication, a 5V USB power input, a DC-DC voltage converter (5V to 3.3V), an 8-channel DIP switch (for setting PAN ID and router quantity), an LED driver for status indication, and a reset switch.

[0080] Users can configure network settings (PAN ID, number of connected devices) via DIP switches before initial power-on. Upon power-on, the gateway automatically connects to the Zigbee network and links to a cloud server via WiFi. During this process, users can intuitively check each status through the blinking of lamps, and the lamps also react to receive or transmit commands, providing operational feedback.

[0081] The router is a relay device that receives Zigbee commands from the gateway and transmits them to the fan controller via a wired method (RS-485, Modbus RTU protocol). It includes a control MCU, a Zigbee communication module, a 24V DC power input (supplied by the fan controller), a DC-DC converter (24V to 3.3V), GPIO IN, PWM OUT, and ADC-IN (0~10V) functions. Additionally, the PAN ID, device ID, group ID, etc. can be set through an 8-channel DIP switch.

[0082] The initial settings are stored in the EEPROM, and the device can be reset based on the DIP value by pressing the reset switch for 5 seconds. Additionally, the router illuminates a red or green lamp depending on its operating status and visually indicates whether the fan is running, enhancing the efficiency of on-site inspections by administrators.

[0083] This system pre-registers each fan's unique MAC address or router ID information in the cloud, allowing for logical identification and selective control via a smartphone app. Furthermore, by synchronizing network configuration information with the cloud through automatic handshaking after installation, it enables immediate operation without the need for complex separate settings. In particular, since speed tables corresponding to fan product identification values ​​(F111, F112, etc.) are stored on the server, control commands for each ceiling fan model are automatically optimized and transmitted.

[0084] In addition, the system of the present invention secures stable connection performance with a Zigbee communication distance of approximately 45m between the gateway and the router and approximately 60m between the gateway and the WiFi router, and maximizes communication stability by pre-testing relay distances and communication delays based on the indoor structure. This configuration provides more precise and flexible scalability compared to existing ceiling fan control systems, and offers substantial technological advancements in terms of fault responsiveness, maintenance, and ease of installation.

[0085] In addition, as another preferred embodiment of the present invention, the system can be implemented through an IoT module-based hardware configuration and operation flow as shown in FIGS. 4, 5, and 6.

[0086] FIG. 4 is a block diagram showing the internal configuration of a gateway, which is a first part of the present invention, FIG. 5 is a block diagram showing the internal configuration of a router, which is a first part of the present invention, and FIG. 6 is a system connection diagram showing the interoperability flow between Zigbee, Gateway, Router, and Controller,

[0087] First, as shown in FIG. 6, each ceiling fan (10) is wired to a Zigbee router (12) through a control box (11), and each router is wirelessly connected to a Zigbee gateway (13). The gateway (13) is connected to a cloud server (14) through a Wi-Fi router (16), and the server is connected to a smartphone (15) via wireless communication to form the entire control command and feedback flow.

[0088] Here, the gateway (13) illustrated in FIG. 4 incorporates an MCU for Zigbee wireless communication and a WiFi module (ESP32), and can set the PAN ID and router quantity using an 8-channel DIP switch. The settings are stored in the EEPROM, and can enter an initialization mode and a WiFi re-registration mode depending on the operation of the reset switch (hold for 2 or 5 seconds).

[0089] In addition, the gateway (13) indicates whether it is connected to the Zigbee network by flashing a red LED after power is applied, and a blue LED lights up when the cloud connection is complete.

[0090] The blue lamp and the Zigbee reception lamp blink once each time an MQTT command is received or transmitted, allowing for intuitive verification of the operating status.

[0091] The router (12) shown in FIG. 5 is a relay module that transmits ceiling fan control signals to a control box and includes a Zigbee communication module, a control microcomputer, an RS-485 interface (Modbus RTU method), a 24VDC input section, a DC to DC conversion circuit (24V→3.3V), GPIO IN, PWM OUT, ADC-IN, etc.

[0092] When power is applied, the router automatically connects to the Zigbee network based on the PAN ID and Device ID settings. When a command is received from the gateway, the message reception lamp blinks, and the status lamp lights up red or green depending on whether the fan is operating (FAN OFF: red, FAN ON: green). This allows the maintenance operator to intuitively understand the status on-site.

[0093] Each ceiling fan is pre-registered on a cloud server based on a fan model identifier (F111, F112, etc.), and the user app queries this to automatically select the appropriate control command for the fan. The fan controller is connected to a router via ports such as A01, GND, AI1, 10V, DI4, DI3, CM, and 24V, and allows for setting rotational speeds through PWM and ADC control.

[0094] In addition, when an error occurs in the fan, the control box (11x) transmits the details to the cloud via the router as a Zigbee message, and a detailed message such as 'Fan 3 Error: Rotation Anomaly' is immediately displayed on the smartphone app, allowing for real-time inspection and response.

[0095] Furthermore, the system of the present invention utilizes a Zigbee-based mesh network for stable communication even in large spatial environments, and its reliability has been proven through real-world testing with a distance of 30–45m between fans and a maximum distance of 60m between a gateway and a WiFi router. A single gateway can simultaneously connect to up to 20 routers, maintaining an organic communication structure within the same network based on PAN IDs. Upon initial installation, each router registers fan location information to the cloud through an automatic handshaking process, and the app visually provides the logical ID and status of the fans.

[0096] Compared to existing simple wireless control or centralized methods, this configuration significantly improves the efficiency of individual control and fault response for each fan, and enables the implementation of a system optimized for high-ceiling indoor spaces such as industrial sites and public facilities in terms of installation flexibility, communication stability, and ease of maintenance.

[0098] Although the technical concept of the present invention has been specifically described in preferred embodiments, it should be noted that the aforementioned embodiments are for illustrative purposes only and are not intended to be limiting. It is obvious to those skilled in the art that various modifications and variations are possible within the scope of the technical concept of the present invention, and therefore, it is natural that such modifications and variations fall within the scope of the appended claims. Explanation of the symbols

[0100] 10a, 10b, 10c: Ceiling fan 11a, 11b, 11c: Control box 12a, 12b, 12c: Routers 13: Gateway 14 : Cloud Server 15 : Smartphone 16 : Wi-Fi router

Claims

Claim 1 A system for individually wirelessly controlling multiple large ceiling fans, comprising: a control box connected to each of the multiple large ceiling fans installed in a high ceiling and performing on / off control and airflow adjustment of the said ceiling fan; a router connected to the control box via a wired connection and receiving control commands or transmitting status information via wireless Zigbee communication; a gateway connected to the multiple routers via wireless Zigbee communication and performing TCP / IP-based communication with a cloud server; and a smartphone configured to communicate through the gateway and the cloud server, having an application installed that generates individual control commands for the multiple ceiling fans and checks the fan status in real time.and includes a cloud server that relays commands between the smartphone and the gateway and collects fan status data, wherein the gateway includes a gateway DIP switch for setting a PAN ID, which is a Zigbee network identification value, and the number of target routers to be connected, an EEPROM for storing the setting value of the gateway DIP switch, and a reset switch for initializing the setting value of the EEPROM, and the router includes a router DIP switch for setting at least one of a PAN ID, a Device ID, and a Group ID, an EEPROM for storing the setting value of the router DIP switch, and a wired communication interface for communicating with the control box via an RS-485-based MODBUS RTU protocol, wherein the gateway and the router are configured to read the respective DIP switch setting values ​​upon initial power application and to connect to the same Zigbee network based on the read PAN ID, and the cloud server stores fan identification information and a fan product identification code corresponding to the MAC address or router ID of the router, and converts a control command input from the smartphone into a control command corresponding to the ceiling fan by referring to a speed table corresponding to the fan product identification code, and from the smartphone A wireless individual control system for multiple large ceiling fans using a smartphone, characterized in that an input control command is transmitted to the gateway via the cloud server, the gateway transmits the control command to the corresponding router via Zigbee, the router controls the corresponding ceiling fan through the control box, and fan status information or error information generated in the control box is fed back to the smartphone via the router, the gateway, and the cloud server. Claim 2 A control method for individually controlling multiple large ceiling fans, comprising: a step of setting a PAN ID, which is a Zigbee network identification value, and the number of target routers to be connected through a gateway DIP switch provided in a gateway, and setting at least one of a PAN ID, a Device ID, and a Group ID through a router DIP switch provided in a router; a step of, upon initial power application, the gateway and the router each reading the DIP switch setting values, storing the read setting values ​​in an EEPROM, and the gateway and router having the same PAN ID forming a Zigbee network; a step of registering fan identification information and a fan product identification code corresponding to the MAC address or router ID of the router on a cloud server; a step of a user on a smartphone selecting a specific ceiling fan through a control app and inputting an operation command; a step of transmitting the operation command input from the smartphone to a cloud server via TCP / IP communication; a step of the cloud server referencing a speed table corresponding to the fan product identification code to generate a control command corresponding to the selected ceiling fan; a step of the cloud server transmitting the control command to a gateway corresponding to the ceiling fan; and a step of the gateway controlling the target router via Zigbee communication. A wireless individual control method for multiple large ceiling fans using a smartphone, comprising: a step of transmitting a command; a step in which the router transmits the command to a wired control box using an RS-485-based MODBUS RTU protocol, and the control box operates the corresponding ceiling fan; and a step in which the response result, status information, or error information of the ceiling fan is fed back to a smartphone via the control box, router, gateway, and cloud server. Claim 3 A wireless individual control system for multiple large ceiling fans using a smartphone, characterized in that, in claim 1, the router is configured to form a Zigbee mesh network and maintain communication stability through multiple hop paths between routers. Claim 4 A wireless individual control system for multiple large ceiling fans using a smartphone, characterized in that, in claim 1, the control box is configured to detect conditions such as operation errors, overheating, or inability to rotate of the ceiling fan and transmit them to a user's smartphone in the form of an error message via a router. Claim 5 A wireless individual control system for multiple large ceiling fans using a smartphone, characterized in that, in claim 1, the gateway is configured to communicate simultaneously with up to 20 routers. Claim 6 A wireless individual control system for multiple large ceiling fans using a smartphone, characterized in that, in claim 1, the cloud server stores identification information and status history of the ceiling fans and provides the location and identification of each fan as a visual interface in a smartphone app. Claim 7 A wireless individual control method for multiple large ceiling fans using a smartphone, characterized in that, in claim 2, the control command includes at least one of power setting, wind speed level adjustment, forward / reverse rotation setting, or scheduled operation setting of the ceiling fan. Claim 8 A wireless individual control method for multiple large ceiling fans using a smartphone, characterized in that, in the feedback step of claim 2, the success or failure of the ceiling fan's operation, sensor information, or error code is displayed in real time on the smartphone app screen. Claim 9 A wireless individual control system for multiple large ceiling fans using a smartphone, characterized in that, in claim 1, the gateway includes a DIP switch capable of setting a Zigbee network identification value (PAN ID) and a number of routers, the set value is stored in an EEPROM, and the EEPROM value can be initialized using a reset switch. Claim 10 A wireless individual control system for multiple large ceiling fans using a smartphone, characterized in that, in claim 1, the router is linked with a Zigbee communication module and can communicate with the control box or a fan controller included in the control box via an RS-485-based MODBUS RTU protocol, and the router includes a PWM OUT terminal for outputting a fan rotation speed control signal, an ADC-IN terminal for receiving a 0~10V analog signal, and a GPIO IN terminal for receiving a fan operation status signal or an external contact signal. Claim 11 A wireless individual control system for multiple large ceiling fans using a smartphone, characterized in that, in claim 1, the control system recognizes the type of fan controller based on product identification codes (F111, F112) and sets the fan rotation speed by referring to a corresponding speed table. Claim 12 A wireless individual control system for multiple large ceiling fans using a smartphone, wherein, in claim 1, the gateway comprises an ESP32 chip-based WiFi module, a Zigbee communication module, and a control microcontroller that controls the transmission and reception operations of the Zigbee communication module and the command processing of the gateway, and the gateway communicates with an AWS IoT cloud server via the MQTT protocol and transmits control commands received from the AWS IoT cloud server to the router. Claim 13 A wireless individual control system for multiple large ceiling fans using a smartphone according to claim 1, wherein the gateway reads the setting value of a DIP switch for the gateway upon initial power application to set a PAN ID and the number of routers to be connected, the router reads the setting value of a DIP switch for the router upon initial power application to set a PAN ID, Device ID, and Group ID, the gateway and the router are connected to the same Zigbee network when the read PAN IDs correspond to each other, the router transmits fan identification information including its MAC address or router ID to the cloud server through the gateway upon initial connection, and the cloud server stores the fan identification information so that each ceiling fan can be logically distinguished and controlled by a user app.

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