Intelligent factory building dynamic ventilation energy-saving system

Abstract

The application discloses an intelligent factory building dynamic ventilation energy-saving system and relates to the technical field of ventilation control. The system aims at solving the problems of insufficient network bearing capacity, high equipment and operation cost, short communication distance, poor penetration, weak cluster control ability and the like of the existing window control system in the factory scene. The system adopts a star-shaped wireless network architecture composed of a centralized controller and a terminal controller. The centralized controller is loaded with a 4GCAT.1 module based on OpenCPU technology and a dual-channel ChirpIoT technology wireless module. The terminal controller is integrated with a power supply isolation voltage stabilizing circuit, a ChirpIoT wireless communication module, an MCU control circuit and an electric window opener driving circuit. The device is controlled by platform software, and mutual cooperation is realized. The system can control dozens to hundreds of windows in the factory through a single controller, reduces the equipment cost and operation energy consumption, and guarantees the stability and reliability of the ventilation control.

Description

Technical Field

[0001] This invention relates to the field of ventilation control technology, and in particular to a smart factory building dynamic ventilation and energy-saving system. Background Technology

[0002] In daily factory production, workshops often experience high temperatures and high pollution during the day. At night, ventilation through open windows is necessary for natural cooling and the dispersal and removal of pollutants. Traditional manual window operation is not only risky (e.g., when operating windows at heights) but also inefficient. Therefore, electric window control systems have become widely used. However, existing electric window control technology still has several shortcomings, as follows: (a) Existing technology 1: Existing technology 1 uses a "220V AC power supply controller + button / remote control" solution. The controller controls 1-4 motorized window openers via buttons or a short-range remote control (using 433MHz wireless technology). This technology has the following drawbacks: Weak cluster control capabilities: A single controller can only handle a limited number of motorized window openers, typically only 1-4. For factories with dozens of windows, this necessitates deploying a large number of controllers, significantly increasing management complexity. Furthermore, it cannot achieve rapid, synchronized response across all windows during extreme weather conditions.

[0003] The operating range is limited: the remote control has a short range, requiring operators to be within close range to control the windows. Since factory workshops are typically large, this significantly increases the intensity of manual operation and consumes a considerable amount of time.

[0004] Construction and safety risks are high: Each controller requires a 220V AC power supply, making the construction workload enormous. Furthermore, managing the power supply to multiple controllers also presents safety hazards.

[0005] (ii) Existing technology 2: Existing technology two employs a "WIFI / 4G controller + mobile APP / mini-program remote control" solution, utilizing WIFI or 4G networks to remotely control the electric window opener. The main drawbacks of this technology are: Insufficient network capacity: The node capacity of a WIFI router is limited. When a large number of window controllers in the factory are connected to the WIFI network, they will occupy a lot of wireless resources, which will have an adverse effect on the speed and stability of the factory's office network.

[0006] High cost and energy consumption: Devices using 4G technology have inherently high hardware costs, and data charges are incurred during long-term operation. When factories need to deploy such 4G controllers on a large scale, both the initial investment and subsequent operating costs become extremely high. Although Wi-Fi solutions do not require data charges, their coverage distance is shorter. To achieve full coverage, an additional number of routers is needed, which also increases the overall cost.

[0007] (iii) Defects in communication technology: Most existing electric window controllers use FSK, GFSK, or OOK wireless modulation methods. These modulation methods have the problem of short communication distance, usually only tens of meters, and poor penetration through walls. This makes them unable to meet the signal coverage requirements of large spaces and multiple walls in factory environments, and makes it difficult to achieve massive access control with "one-to-many" communication.

[0008] To address the problems existing in the prior art, this invention proposes a smart factory building dynamic ventilation and energy-saving system, aiming to solve core pain points such as network carrying capacity, cost, communication distance, and cluster control. Summary of the Invention

[0009] In order to overcome the shortcomings of the prior art, this application proposes a smart factory building dynamic ventilation and energy-saving system to solve the problems existing in the prior art.

[0010] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A smart factory building dynamic ventilation and energy-saving system includes a central controller and at least one terminal controller. The central controller and each of the terminal controllers form a star-shaped wireless network through ChirpIoT wireless communication to complete data interaction and control command transmission. The centralized controller includes a power module, a 4G CAT.1 communication module based on OpenCPU technology, and at least one Chirp IoT technology wireless module; The terminal controller includes a power isolation and voltage regulation module, an MCU control module, a ChirpIoT technology wireless communication module, and an electric window opener drive module. The centralized controller accesses the external network via a 4G CAT.1 communication module and sends window opening and closing control commands to the terminal controller via a ChirpIoT wireless module. The terminal controller receives the control commands via a ChirpIoT wireless communication module, processes them through the MCU control module, and then drives the electric window opener module to open and close the window.

[0011] As a further technical solution of the present invention: the power module of the centralized controller consists of a power input interface DC1, a self-resetting fuse F1, a DC power control chip U18, an LDO low dropout regulator U19 and peripheral components. The power input interface DC1 is connected to a 12V adapter power supply, and its output terminal is connected in series with the self-resetting fuse F1 and then connected to the input terminal of the DC power control chip U18. The peripheral circuit of the DC power control chip U18 includes resistors R41, R42, R44, capacitors C32, C34, C35, and power inductor L5. Resistors R44 and R42 form a voltage divider feedback circuit to control the DC power control chip U18 to output a 4V DC voltage. The input terminal of the LDO low dropout regulator U19 is connected to the 4V output terminal of the DC power control chip U18, and the output terminal outputs a 3.3V DC voltage. Its peripheral circuit includes capacitors C29, C30, C31 and C33. The 4V output of the DC power control chip U18 powers the 4GCAT.1 communication module ML307R, and the 3.3V output of the LDO low dropout regulator U19 powers the ChirpIoT technology wireless module PAN3029.

[0012] As a further technical solution of the present invention: the 4GCAT.1 communication module ML307R of the centralized controller integrates UART, SPI, I2C and USB interfaces, and its peripheral circuit includes SIM card slot CARD1, 4G antenna interface RF1, capacitors and resistors; The 4GCAT.1 communication module ML307R is connected to the second ChirpIoT wireless module via the SPI0 interface and to the first ChirpIoT wireless module via the SPI1 interface. The first and second ChirpIoT technology wireless modules operate on different channels and run in parallel to improve network transmission and reception speed.

[0013] As a further technical solution of the present invention: the centralized controller further includes at least two level conversion chips. The IO interface voltage of the 4GCAT.1 communication module ML307R is 1.8V, and the IO interface voltage of the ChirpIoT technology wireless module is 3.3V. The level conversion chip is used to realize IO level compatibility conversion between the 4GCAT.1 communication module ML307R and the ChirpIoT technology wireless module.

[0014] As a further technical solution of the present invention: the power isolation and voltage regulation module of the terminal controller is composed of an input interface, a one-time fuse FH1, a DC-DC step-down isolation module U11, a first voltage regulator chip U13 and a second voltage regulator chip U15; The 24V DC power supply connected to the input interface is connected in series with a one-time fuse FH1 and then outputs in two ways: one way is connected to the input terminal of the DC-DC step-down isolation module U11, and the other way is connected to the input terminal of the second voltage regulator chip U15. The output of the DC-DC step-down isolation module U11 is connected to the input of the first voltage regulator chip U13. The first voltage regulator chip U13 outputs a 3.3V DC voltage to power the MCU control module HC32L136J8TA and the ChirpIoT wireless communication module. Its peripheral circuit includes capacitors C21, C2, C3 and C1. The second voltage regulator chip U15 outputs a 5V DC voltage to power the relay control circuit of the electric window opener drive module. Its peripheral circuit includes capacitors C24 and C23. The power isolation and voltage regulation module achieves isolation between the external 24V power supply, relay control circuit and low-voltage MCU working circuit through the DC-DC step-down isolation module U11.

[0015] As a further technical solution of the present invention: the electric window opener drive module of the terminal controller is composed of two pairs of transistors Q2 and Q3, two optocouplers U14 and U16, two relays RLY2 and RLY3, eight resistors R28, R29, R31, R30, R32, R33, R34 and R35, two diodes D2 and D3 and two capacitors C22 and C25; The M0_IN pin of the MCU control module HC32L136J8TA is connected to the input terminal of optocoupler U14 through resistor R28. The output terminal of optocoupler U14 is connected to the base of transistor Q2 through resistor R29. The collector of transistor Q2 is connected to the coil terminal of relay RLY2. The normally closed contact of relay RLY2 is grounded, the normally open contact is connected to the 24V power supply, and the common contact is connected to the M0 terminal of the electric window opener actuator. The M1_IN pin of the MCU control module HC32L136J8TA is connected to the input terminal of optocoupler U16 through resistor R32. The output terminal of optocoupler U16 is connected to the base of transistor Q3 through resistor R33. The collector of transistor Q3 is connected to the coil terminal of relay RLY3. The normally closed contact of relay RLY3 is grounded, the normally open contact is connected to the 24V power supply, and the common contact is connected to the M1 terminal of the electric window opener actuator. Diodes D2 and D3 are connected in parallel across the coils of relays RLY2 and RLY3, respectively, for freewheeling protection; capacitors C22 and C25 are connected in parallel across the coils of relays RLY2 and RLY3, respectively, for filtering. When the MCU controls optocoupler U14 to conduct, transistor Q2 conducts, relay RLY2 is energized and energized, outputting 24V to terminal M0. At the same time, relay RLY3 is de-energized and grounded, causing the electric window opener actuator to rotate forward, thus opening the window. When the MCU controls optocoupler U16 to conduct, transistor Q3 conducts, relay RLY3 is energized and energized, outputting 24V to terminal M1. At the same time, relay RLY2 is de-energized and grounded, causing the electric window opener actuator to rotate in reverse, thus closing the window.

[0016] As a further technical solution of the present invention: the peripheral circuit of the MCU control module HC32L136J8TA of the terminal controller includes: Storage unit: External I2C interface EEPROM, connected via PA09 and PA10 pins, used to store wireless link parameters and device address information; Local control unit: Two external buttons KEY1 and KEY2 are connected via PC13 and PC14 pins respectively. The peripheral circuit of the buttons includes resistors R24, R26, R38, R39 and capacitors C27 (100nF) and C28, which are used to control the opening and closing of the window locally. Debugging interface unit: USB to serial port is expanded through USB chip U17. The RXD and TXD pins of USB chip U17 are connected to the U_RX and U_TX pins of MCU through resistors R36 and R37 respectively, which are used to configure the working parameters of terminal controller through computer USB interface; Clock unit: External crystal oscillator circuit, connected via XTLO / PC15 pin, provides clock signal to MCU; Reset Unit: Connected to the reset circuit via the RESETB pin to ensure stable startup and operation of the MCU.

[0017] As a further technical solution of the present invention: the IO interface voltage of the ChirpIoT technology wireless communication module of the terminal controller and the MCU control module HC32L136J8TA are both 3.3V, which does not require level conversion and can be directly connected through the SPI interface and control pins to realize data interaction and control.

[0018] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages: 1. To address the issues of insufficient WIFI network capacity and high cost of 4G technology in existing window opening control systems, a network access solution with lower cost and stronger network capacity is provided.

[0019] 2. Solve the problems of short communication distance and poor wall penetration of existing wireless communication technologies (such as FSK, GFSK, OOK) to achieve signal coverage without dead zones within the factory area.

[0020] 3. The equipment is controlled through platform software, enabling coordinated use and allowing a single controller to manage dozens to hundreds of windows within the factory. Attached Figure Description

[0021] Figure 1 This is the circuit diagram for the power supply section of the centralized controller; Figure 2 Circuit diagram of ML307R module; Figure 3 Circuit diagram for a low-power wide-area wireless module; Figure 4 This is the circuit diagram for the power supply section of the terminal controller. Figure 5 This is a circuit diagram for an electric window opener drive. Figure 6 This is the peripheral circuit diagram of a low-power wide-area wireless communication module. Figure 7 Diagram of the MCU and its peripheral circuitry; Figure 8 This is a circuit diagram for an external button. Figure 9 This is a circuit diagram of a USB chip. Detailed Implementation

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0023] like Figures 1-9 As shown, a smart factory building dynamic ventilation and energy-saving system includes a central controller and at least one terminal controller. The central controller and each terminal controller form a star-shaped wireless network through ChirpIoT wireless communication to complete data interaction and control command transmission. The centralized controller includes a power module, a 4GCAT.1 communication module based on OpenCPU technology (model ML307R), and at least one ChirpIoT technology wireless module (model PAN3029). The terminal controller includes a power isolation and voltage regulation module, an MCU control module (model HC32L136J8TA), a ChirpIoT technology wireless communication module (model PAN3029), and an electric window opener drive module. The central controller connects to the external network via a 4G CAT.1 communication module and sends window opening and closing control commands to the terminal controller via a ChirpIoT wireless module. The terminal controller receives the control commands via a ChirpIoT wireless communication module, processes them through the MCU control module, and drives the electric window opener module to open and close the windows.

[0024] The power module of the centralized controller consists of a power input interface (DC1), a self-resetting fuse (F1, model JK-mSMD110-33), a DC power control chip (U18, model RY9122), an LDO low dropout regulator (U19, model HE9073A33MR) and peripheral components. The power input interface (DC1) is connected to a 12V adapter power supply, and its output terminal is connected to the input terminal of the DC power control chip (U18) after being connected in series with a resettable fuse (F1). The peripheral circuit of the DC power control chip (U18) includes resistors R41 (100kΩ), R42 (40kΩ), and R44 (10kΩ), capacitors C32 (100nF), C34 (4.7uF), and C35 (100uF), and power inductor L5 (4.7uH). Resistors R44 and R42 form a voltage divider feedback circuit to control the DC power control chip (U18) to output a 4V DC voltage (VDC4V). The input terminal of the LDO low dropout regulator (U19) is connected to the 4V output terminal of the DC power control chip (U18), and the output terminal outputs a 3.3V DC voltage (VDC3.3V). Its peripheral circuit includes capacitors C29 (100nF), C30 (47uF), C31 (100nF), and C33 (1uF). The DC power control chip (U18) outputs a 4V voltage to power the 4GCAT.1 communication module (ML307R), while the LDO low dropout regulator (U19) outputs a 3.3V voltage to power the ChirpIoT technology wireless module (PAN3029).

[0025] The 4GCAT.1 communication module (ML307R) of the central controller integrates UART, SPI, I2C and USB interfaces, and has secondary development capabilities. Its peripheral circuit includes a SIM card slot (CARD1), a 4G antenna interface (RF1), capacitors (with capacitance values ​​of 220uF, 100nF and 33pF respectively) and resistor R1 (with resistance value of 100Ω). The 4GCAT.1 communication module (ML307R) connects to the first ChirpIoT wireless module (PAN3029) via the SPI0 interface (including SPI0_MISO, SPI0_MOSI, SPI0_SCK, SPI0_CSN, SPI0_IRQ, and SPI0_RST pins), and connects to the second ChirpIoT wireless module (PAN3029) via the SPI1 interface (including SPI1_MISO, SPI1_MOSI, SPI1_SCK, SPI1_CSN, SPI1_IRQ, and SPI1_RST pins). The first and second ChirpIoT technology wireless modules (PAN3029) operate on different channels and run in parallel to improve network transmission and reception speed.

[0026] The centralized controller also includes at least two level conversion chips (U20, U22, model RS0108). The IO interface voltage of the 4GCAT.1 communication module (ML307R) is 1.8V, and the IO interface voltage of the ChirpIoT technology wireless module (PAN3029) is 3.3V. The level conversion chips (U20, U22) are used to achieve IO level compatibility conversion between the 4GCAT.1 communication module (ML307R) and the ChirpIoT technology wireless module (PAN3029).

[0027] The power isolation and voltage regulation module of the terminal controller consists of an input interface (connected to a 24V DC power supply), a one-time fuse (FH1), a DC-DC step-down isolation module (U11, model B2405S-1WR3_C5365293), a first voltage regulator chip (U13, model AMS1117-3.3) and a second voltage regulator chip (U15, model 78N05G-AB3-R); The 24V DC power supply connected to the input interface is connected in series with a one-time fuse (FH1) and then outputs in two ways: one way is connected to the input terminal of the DC-DC step-down isolation module (U11), and the other way is connected to the input terminal of the second voltage regulator chip (U15); The output of the DC-DC step-down isolation module (U11) is connected to the input of the first voltage regulator chip (U13). The first voltage regulator chip (U13) outputs a 3.3V DC voltage to power the MCU control module (HC32L136J8TA) and the ChirpIoT wireless communication module (PAN3029). Its peripheral circuit includes capacitors C21 (22uF), C2 (4.7uF), C3 (4.7uF), and C1 (100nF). The second voltage regulator chip (U15) outputs a 5V DC voltage to power the relay control circuit of the electric window opener drive module. Its peripheral circuit includes capacitors C24 (100nF) and C23 (100nF). The power isolation regulator module achieves isolation between the external 24V power supply, relay control circuit and low-voltage MCU working circuit through the DC-DC step-down isolation module (U11).

[0028] The electric window opener drive module of the terminal controller consists of two pairs of transistors (Q2, Q3, model BC807-16, amplification range 100-250), two optocouplers (U14, U16), two relays (RLY2, RLY3, model SRD-05VDC-SL-C), eight resistors (R28, R33, 1kΩ; R29, R34, 3kΩ; R30, R31, R34, R35, 10kΩ), two diodes (D2, D3, model 1N4007), and two capacitors (C22, C25, 100nF). The M0_IN pin of the MCU control module (HC32L136J8TA) is connected to the input terminal of optocoupler U14 through resistor R28. The output terminal of optocoupler U14 is connected to the base of transistor Q2 through resistor R29. The collector of transistor Q2 is connected to the coil terminal of relay RLY2. The normally closed contact of relay RLY2 is grounded, the normally open contact is connected to the 24V power supply, and the common contact is connected to the M0 terminal of the electric window opener actuator. The M1_IN pin of the MCU control module (HC32L136J8TA) is connected to the input terminal of optocoupler U16 through resistor R32. The output terminal of optocoupler U16 is connected to the base of transistor Q3 through resistor R33. The collector of transistor Q3 is connected to the coil terminal of relay RLY3. The normally closed contact of relay RLY3 is grounded, the normally open contact is connected to the 24V power supply, and the common contact is connected to the M1 terminal of the electric window opener actuator. Diodes D2 and D3 are connected in parallel across the coils of relays RLY2 and RLY3, respectively, for freewheeling protection; capacitors C22 and C25 are connected in parallel across the coils of relays RLY2 and RLY3, respectively, for filtering. When the MCU controls optocoupler U14 to conduct, transistor Q2 conducts, relay RLY2 is energized and energized, outputting 24V to terminal M0. At the same time, relay RLY3 is de-energized and grounded, causing the electric window opener actuator to rotate forward, thus opening the window. When the MCU controls optocoupler U16 to conduct, transistor Q3 conducts, relay RLY3 is energized and energized, outputting 24V to terminal M1. At the same time, relay RLY2 is de-energized and grounded, causing the electric window opener actuator to rotate in reverse, thus closing the window.

[0029] The peripheral circuitry of the terminal controller's MCU control module (HC32L136J8TA) includes: Storage unit: External I2C interface EEPROM (connected via PA09 and PA10 pins), used to store wireless link parameters and device address information; Local control unit: Two external buttons (KEY1, KEY2, connected via XTLI / PC14 and PC13 pins respectively). The peripheral circuit of the buttons includes resistors R24 (10kΩ), R26 (100Ω), R38 (100Ω), R39 (10kΩ) and capacitors C27 (100nF) and C28 (100nF), used for local control of the opening and closing of the window; Debugging interface unit: USB to serial port is extended through USB chip (U17, model CH340E). The RXD and TXD pins of USB chip U17 are connected to the U_RX and U_TX pins of MCU through resistors R36 (100Ω) and R37 (100Ω) respectively, which are used to configure the working parameters of terminal controller through computer USB interface. Clock unit: External crystal oscillator circuit (connected via XTLO / PC15 pin) to provide clock signal to MCU; Reset Unit: Connected to the reset circuit via the RESETB pin to ensure stable startup and operation of the MCU.

[0030] The terminal controller's ChirpIoT wireless communication module (PAN3029) and MCU control module (HC32L136J8TA) both have an I / O interface voltage of 3.3V. No level conversion is required. They can be directly connected through the SPI interface (including MOSI, MISO, SCK, and CSN pins) and control pins (IRQ, NRST, and RQ) to achieve data interaction and control.

[0031] The ChirpIoT wireless module (PAN3029) of the centralized controller operates at a frequency of 433MHz and adopts ChirpIoT modulation technology. Compared with FSK, GFSK or OOK modulation methods, the communication distance is increased by 3-5 times and the wall penetration is improved. A single centralized controller can achieve signal coverage without dead zones in the factory area.

[0032] The star-shaped wireless network can have a node capacity of up to tens of thousands, supporting a single centralized controller to uniformly control dozens to hundreds of terminal controllers in a factory workshop, eliminating the need to deploy multiple controllers and reducing system implementation and management costs.

[0033] The centralized controller is built on OpenCPU technology and does not require an additional external MCU. It directly realizes 4G network access and terminal controller control logic processing through the 4GCAT.1 communication module (ML307R), which simplifies the hardware structure, reduces equipment costs, and improves development efficiency.

[0034] The system operates independently of the factory's existing Wi-Fi network, eliminating the need to connect to the factory's Wi-Fi network, thus avoiding the occupation of Wi-Fi wireless resources and ensuring the speed and stability of daily network operations in the factory.

[0035] The electric window opener actuator is driven by two core wires with a driving voltage of 24V DC. It opens the window when rotating forward and closes the window when rotating backward. It automatically stops after moving to the fully open or fully closed position. It does not operate when no voltage is applied and consumes no power, thus reducing the system's operating energy consumption.

[0036] The one-time fuse (FH1) is replaceable. When a short circuit occurs in the power supply circuit of the terminal controller, the fuse blows to protect the circuit and components. After troubleshooting, the power supply can be restored by replacing the fuse.

[0037] The ChirpIoT wireless communication between the central controller and the terminal controller adopts an encrypted transmission protocol to ensure the security of control commands and data transmission and to avoid external interference or malicious control.

[0038] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

[0039] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment have been appropriately combined to form other embodiments that are easy for those skilled in the art to understand.

Claims

1. A smart factory building dynamic ventilation and energy-saving system, characterized in that, It includes a central controller and at least one terminal controller. The central controller and each of the terminal controllers form a star-shaped wireless network through ChirpIoT wireless communication to complete data interaction and control command transmission. The centralized controller includes a power module, a 4G CAT.1 communication module based on OpenCPU technology, and at least one Chirp IoT technology wireless module; The terminal controller includes a power isolation and voltage regulation module, an MCU control module, a ChirpIoT technology wireless communication module, and an electric window opener drive module. The centralized controller accesses the external network via a 4G CAT.1 communication module and sends window opening and closing control commands to the terminal controller via a ChirpIoT wireless module. The terminal controller receives the control commands via a ChirpIoT wireless communication module, processes them through the MCU control module, and then drives the electric window opener module to open and close the windows. The peripheral circuit of the MCU control module HC32L136J8TA of the terminal controller includes: Storage unit: External I2C interface EEPROM, connected via PA09 and PA10 pins, used to store wireless link parameters and device address information; Local control unit: Two external buttons KEY1 and KEY2 are connected via XTLI / PC14 and PC13 pins respectively. The peripheral circuit of the buttons includes resistors R24, R26, R38, R39 and capacitors C27 and C28, which are used to control the opening and closing of the window locally. Debugging interface unit: USB to serial port is expanded through USB chip U17. The RXD and TXD pins of USB chip U17 are connected to the U_RX and U_TX pins of MCU through resistors R36 and R37 respectively, which are used to configure the working parameters of terminal controller through computer USB interface; Reset Unit: Connected to the reset circuit via the RESETB pin to ensure stable startup and operation of the MCU.

2. The intelligent factory building dynamic ventilation and energy-saving system according to claim 1, characterized in that, The power module of the centralized controller consists of a power input interface DC1, a self-resetting fuse F1, a DC power control chip U18, an LDO low dropout regulator U19, and peripheral components. The power input interface DC1 is connected to a 12V adapter power supply, and its output terminal is connected in series with the self-resetting fuse F1 and then connected to the input terminal of the DC power control chip U18. The peripheral circuit of the DC power control chip U18 includes resistors R41, R42, R44, capacitors C32, C34, C35, and power inductor L5. Resistors R44 and R42 form a voltage divider feedback circuit to control the DC power control chip U18 to output a 4V DC voltage. The input terminal of the LDO low dropout regulator U19 is connected to the 4V output terminal of the DC power control chip U18, and the output terminal outputs a 3.3V DC voltage. Its peripheral circuit includes capacitors C29, C30, C31 and C33. The 4V output of the DC power control chip U18 powers the 4GCAT.1 communication module ML307R, and the 3.3V output of the LDO low dropout regulator U19 powers the ChirpIoT technology wireless module PAN3029.

3. The intelligent factory building dynamic ventilation and energy-saving system according to claim 1, characterized in that, The ML307R 4GCAT.1 communication module of the central controller integrates UART, SPI, I2C and USB interfaces, and its peripheral circuit includes SIM card slot CARD1, 4G antenna interface RF1, capacitors and resistors. The 4GCAT.1 communication module ML307R is connected to the second ChirpIoT wireless module via the SPI0 interface and to the first ChirpIoT wireless module via the SPI1 interface. The first and second ChirpIoT technology wireless modules operate on different channels and run in parallel to improve network transmission and reception speed.

4. The intelligent factory building dynamic ventilation and energy-saving system according to claim 3, characterized in that, The centralized controller also includes at least two level conversion chips. The IO interface voltage of the 4GCAT.1 communication module ML307R is 1.8V, and the IO interface voltage of the ChirpIoT technology wireless module is 3.3V. The level conversion chips are used to achieve IO level compatibility conversion between the 4GCAT.1 communication module ML307R and the ChirpIoT technology wireless module.

5. The intelligent factory building dynamic ventilation and energy-saving system according to claim 1, characterized in that, The power isolation and voltage regulation module of the terminal controller consists of an input interface, a one-time fuse FH1, a DC-DC step-down isolation module U11, a first voltage regulator chip U13, and a second voltage regulator chip U15. The 24V DC power supply connected to the input interface is connected in series with a one-time fuse FH1 and then outputs in two ways: one way is connected to the input terminal of the DC-DC step-down isolation module U11, and the other way is connected to the input terminal of the second voltage regulator chip U15. The output of the DC-DC step-down isolation module U11 is connected to the input of the first voltage regulator chip U13. The first voltage regulator chip U13 outputs a 3.3V DC voltage to power the MCU control module HC32L136J8TA and the ChirpIoT wireless communication module. Its peripheral circuit includes capacitors C21, C2, C3 and C1. The second voltage regulator chip U15 outputs a 5V DC voltage to power the relay control circuit of the electric window opener drive module. Its peripheral circuit includes capacitors C24 and C23. The power isolation and voltage regulation module achieves isolation between the external 24V power supply, relay control circuit and low-voltage MCU working circuit through the DC-DC step-down isolation module U11.

6. The intelligent factory building dynamic ventilation and energy-saving system according to claim 1, characterized in that, The electric window opener drive module of the terminal controller consists of two pairs of transistors Q2 and Q3, two optocouplers U14 and U16, two relays RLY2 and RLY3, eight resistors R28, R29, R31, R30, R32, R33, R34 and R35, two diodes D2 and D3, and two capacitors C22 and C25. The M0_IN pin of the MCU control module HC32L136J8TA is connected to the input terminal of optocoupler U14 through resistor R28. The output terminal of optocoupler U14 is connected to the base of transistor Q2 through resistor R29. The collector of transistor Q2 is connected to the coil terminal of relay RLY2. The normally closed contact of relay RLY2 is grounded, the normally open contact is connected to the 24V power supply, and the common contact is connected to the M0 terminal of the electric window opener actuator. The M1_IN pin of the MCU control module HC32L136J8TA is connected to the input terminal of optocoupler U16 through resistor R32. The output terminal of optocoupler U16 is connected to the base of transistor Q3 through resistor R33. The collector of transistor Q3 is connected to the coil terminal of relay RLY3. The normally closed contact of relay RLY3 is grounded, the normally open contact is connected to the 24V power supply, and the common contact is connected to the M1 terminal of the electric window opener actuator. Diodes D2 and D3 are connected in parallel across the coils of relays RLY2 and RLY3, respectively, for freewheeling protection; capacitors C22 and C25 are connected in parallel across the coils of relays RLY2 and RLY3, respectively, for filtering. When the MCU controls optocoupler U14 to conduct, transistor Q2 conducts, relay RLY2 is energized and energized, outputting 24V to terminal M0. At the same time, relay RLY3 is de-energized and grounded, causing the electric window opener actuator to rotate forward, thus opening the window. When the MCU controls optocoupler U16 to conduct, transistor Q3 conducts, relay RLY3 is energized and energized, outputting 24V to terminal M1. At the same time, relay RLY2 is de-energized and grounded, causing the electric window opener actuator to rotate in reverse, thus closing the window.

7. The intelligent factory building dynamic ventilation and energy-saving system according to claim 1, characterized in that, The terminal controller's ChirpIoT wireless communication module and the MCU control module HC32L136J8TA both have an I / O interface voltage of 3.3V, requiring no level conversion. They can be directly connected via the SPI interface and control pins to achieve data interaction and control.

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