Energy-saving ventilation system for underground building

Abstract

The invention belongs to the technical field of building ventilation, and particularly relates to an underground building energy-saving ventilation system which comprises a plurality of fan devices connected with a power generation assembly. The ventilation pipeline comprises a body and a plurality of connecting pipes, and the plurality of connecting pipes are respectively connected with the plurality of fan devices; the power generation assembly is arranged on the fan device and connected with a battery, and the battery supplies power to the fan device; wherein any two fan devices in the multiple fan devices are provided with power generation assemblies and supply power to one fan device, and the three fan devices are used in cooperation.

Description

Technical Field

[0001] This invention patent belongs to the field of building ventilation technology, and in particular relates to an energy-saving ventilation system for underground buildings. Background Technology

[0002] Underground buildings lack sufficient window area (or have no window opening conditions), making it impossible to achieve natural air convection through wind pressure and thermal pressure. Furthermore, the temperature difference between the underground space and the ground surface can easily create "thermal barriers," further weakening the natural ventilation power. Therefore, underground buildings are generally equipped with ventilation systems. However, existing ventilation systems often need to operate continuously 24 hours a day, which results in huge operating costs. Moreover, the operating costs increase as the space inside the underground building grows. Therefore, we have specially designed an energy-saving ventilation system for underground buildings. Summary of the Invention

[0003] The purpose of this invention is to address the aforementioned technical problems by providing an energy-saving ventilation system for underground buildings, thereby achieving energy conservation.

[0004] In view of this, the present invention patent provides an energy-saving ventilation system for underground buildings, comprising: The wind turbine unit consists of multiple wind turbine units, and each wind turbine unit is connected to a power generation component. The ventilation duct includes a main body and multiple connecting pipes, which are respectively connected to multiple fan units; A power generation component is installed on the wind turbine unit and connected to a battery, which supplies power to the wind turbine unit. Among them, any two wind turbine units are equipped with power generation components and supply power to one wind turbine unit, and the three wind turbine units work together.

[0005] In the above technical solution, the fan unit further includes: The casing has open ports at both ends, and one open port of the casing is connected to one of multiple connecting pipes in a constricted shape. The other open port of the casing is connected to a cover, and the cover is equipped with a ventilation end. A dual-head motor, with motor shafts at both ends and fan blades connected to each shaft; The mounting bracket has an open port at one end of the housing that connects to the cover and is set inside the housing, and the dual-head motor is fixed inside the housing; Among them, the wind turbine unit equipped with power generation components has an installation frame on the upper side of the casing, the power generation components are installed in the installation frame, and the installation frame has a through groove that communicates with the inside of the casing. Among them, the motor shaft of the wind turbine equipped with power generation components is provided with an assembly structure, which is connected to the power generation components. Among them, the wind turbine unit without a power generation component has a circuit interface on the upper side of the casing.

[0006] In the above technical solution, the mounting bracket further includes: The first frame includes a connecting frame, a support frame, and a fixing ring frame. The connecting frame is provided with a shaft hole. Multiple support frames are provided on the outer peripheral surface of the connecting frame. The fixing ring frame is connected to the outside of the multiple support frames and abuts against the inner wall surface of the housing. The second frame has the same structure as the first frame, and the second frame and the first frame are arranged one in front of the other. The dual-head motor is located between the second frame and the first frame.

[0007] In the above technical solution, further, the connecting frame wall on the adjacent side of the first frame and the second frame is provided with an assembly end formed outward, and the assembly end has a connecting shaft hole formed inside the assembly cavity, and the dual-head motor is set in the installation cavity.

[0008] In the above technical solution, a pad is further provided on the outer wall of the fixing ring frame, and the fixing ring frame is fixed by a tight fit between the pad and the inner wall of the housing.

[0009] In the above technical solution, the power generation components further include: The stator is set inside the mounting frame and has working holes. The rotor is installed in the working hole, and the shafts at both ends of the rotor are connected to brackets, which are fixed to the casing wall. A turntable structure is provided, which is mounted on the shafts at both ends of the rotor. The transmission belt is connected to the turntable structure and the assembly structure by a through groove.

[0010] Furthermore, the above technical solution also includes: A transformer is installed on the circuit of a power generation component and is connected to a power supply line that supplies power to a wind turbine unit that does not have a power generation component.

[0011] Furthermore, the above technical solution also includes: The mounting box has a compartment on its upper side; The wind turbine and power generation components are housed in the mounting box, while the transformer and power supply lines are housed in the compartment box.

[0012] Furthermore, in the above technical solution, the power supply line is connected to the power grid.

[0013] Furthermore, the above technical solution also includes: S1. The multiple fan units are grouped into three fan units as a working unit, with two fan units in the working unit serving as a power supply unit and one fan unit serving as a power consumption unit. S2. Both wind turbine units in the power consumption unit are powered by the power grid. The power generation component converts the mechanical energy generated by the rotation of the wind turbine unit into electrical energy, and supplies energy to the power consumption unit through transformers and power supply lines.

[0014] S3. The fan unit at the power consumption unit is normally closed and starts when needed. The power supply line supplies power to the grid in the normally closed state and supplies power to the fan unit when needed.

[0015] The beneficial effects of this invention patent are as follows: The system directly integrates the power generation components into the wind turbine, eliminating the need for additional independent power generation equipment and complex energy transmission lines, simplifying the overall structural layout and reducing the occupancy rate of limited underground building space. Simultaneously, the modular design of the wind turbine and pipelines facilitates standardized installation, disassembly, and subsequent maintenance, reducing construction difficulty and installation costs. Furthermore, the energy self-sufficiency mode reduces dependence on the external power grid, lowering electricity costs and mitigating the impact of grid failures on the system, further reducing operation and maintenance costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the working unit of this invention patent; Figure 2 This is a schematic diagram of the fan assembly of this invention patent; Figure 3 This is a schematic diagram of the internal structure of the fan device of this invention patent; Figure 4 This is a partial structural schematic diagram of the present invention patent; The markings in the diagram represent: 1. Fan unit; 11. Casing; 111. Cover; 1111. Ventilation end; 112. Circuit interface; 12. Dual-head motor; 121. Motor shaft; 1211. Assembly structure; 122. Fan blade; 131. First frame; 1311. Connecting frame; 13111. Shaft hole; 1312. Support frame; 1313. Fixing ring frame; 132. Second frame; 2. Ventilation duct; 21. Body; 22. Connecting pipe; 3. Power generation component; 31. Stator; 32. Rotor; 321. Shaft; 33. Turntable structure; 34. Drive belt; 35. Bracket; 4. Assembly end; 41. Mounting cavity; 5. Gasket; 6. Transformer; 61. Power supply line; 7. Mounting box; 71. Compartment box. Detailed Implementation

[0017] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0018] Example 1: This embodiment provides an energy-saving ventilation system for underground buildings, including: A wind turbine unit 1 is provided, and multiple wind turbine units 1 are provided, and power generation components 3 are connected to multiple wind turbine units 1; Ventilation duct 2 includes a body 21 and multiple connecting pipes 22, which are respectively connected to multiple fan devices 1; The power generation component 3 is mounted on the wind turbine unit 1 and connected to a battery, which supplies power to the wind turbine unit 1. Among them, any two wind turbine units 1 in the plurality of wind turbine units 1 are equipped with a power generation component 3 and supply power to one wind turbine unit 1, and the three wind turbine units 1 are used in combination.

[0019] As can be seen from this embodiment, an energy-saving ventilation system for underground buildings includes a fan device 1, a ventilation duct 2, and a power generation component 3; By integrating the power generation component 3 into the wind turbine unit 1, a closed-loop energy utilization system of "power generation-energy storage-power supply" is constructed, breaking the traditional ventilation system's reliance on external power grid for power supply.

[0020] The ventilation system integrates the power generation component 3 directly into the fan unit 1, eliminating the need for additional independent power generation equipment and complex energy transmission lines. This simplifies the overall structural layout and reduces the occupancy of limited underground space. Simultaneously, the modular fan and duct design facilitates standardized installation, disassembly, and subsequent maintenance, reducing construction difficulty and installation costs. Furthermore, the energy self-sufficiency mode reduces dependence on the external power grid, lowering electricity costs and mitigating the impact of grid failures on the system, further reducing operation and maintenance costs.

[0021] Example 2: This embodiment provides an energy-saving ventilation system for underground buildings, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0022] Fan unit 1 includes: The housing 11 has open ports at both ends, and one open port of the housing 11 is connected to one of the multiple connecting pipes 22 in a constricted shape. The other open port of the housing 11 is connected to a cover 111, and the cover 111 is provided with a ventilation end 1111. A dual-head motor 12, with motor shafts 121 at both ends of the dual-head motor 12, and fan blades 122 connected to each motor shaft 121; The mounting bracket is connected to the housing 11 and has an open port at one end. It is located inside the housing 11 and fixes the dual-head motor 12 inside the housing 11. Among them, the upper side of the casing 11 of the wind turbine device 1 equipped with the power generation component 3 is provided with an installation frame, the power generation component 3 is set in the installation frame, and a through groove is provided in the installation frame to communicate with the inside of the casing 11. Among them, the motor shaft 121 of the wind turbine device 1 equipped with the power generation component 3 is provided with an assembly structure 1211, and the assembly structure 1211 is connected to the power generation component 3. Among them, the wind turbine unit 1 without the power generation component 3 has a circuit interface 112 on the upper side of the casing 11.

[0023] As can be seen from this embodiment, the fan unit 1 includes a housing 11, a dual-head motor 12, and a mounting bracket; The casing 11 of the fan unit 1 features open ports at both ends. One end is tapered and precisely connects to the connecting pipe 22. This tapered structure effectively gathers airflow, reduces leakage and resistance at the pipe connection, and improves the transmission efficiency of ventilation airflow. The other end is sealed by the cover 111 and has an air exchange end 1111, forming a smooth airflow channel of "tapered inlet / outlet air - air exchange end 1111 exhaust / inlet air," ensuring continuous airflow. Simultaneously, the adaptable design of the tapered port and connecting pipe 22 facilitates rapid assembly of the fan unit 1 and the ventilation duct 2 system, improving the compatibility accuracy between the fan and the overall ventilation system. It can flexibly adapt to different specifications of connecting pipe 22, enhancing the versatility of the device.

[0024] The system employs a dual-motor design, with both motor shafts 121 connected to fan blades 122. Compared to traditional single-blade fans, the synchronous operation of the dual-blade fans 122 significantly increases the airflow output per unit time, enhancing ventilation power. Simultaneously, the symmetrical power output structure of the dual-motor design ensures more balanced force distribution during operation, reducing vibration and noise associated with single-blade fans 122 operation and improving the stability and quietness of the fan. Furthermore, a mounting bracket extends from the port connecting the housing 11 to the cover 111 and secures the dual-motor design. This mounting method ensures the motor is centrally positioned within the housing 11, guaranteeing coaxiality between the motor shaft 121 and the fan blades 122, preventing friction between the fan blades 122 and the housing 11 due to motor misalignment. This further ensures the reliability of the system and extends the service life of the motor and fan blades 122.

[0025] For the wind turbine unit 1 equipped with the power generation component 3, a mounting frame is provided on the upper side of the casing 11 as a dedicated mounting carrier for the power generation component 3. This not only achieves the integrated design of the power generation component 3 and the wind turbine, avoiding the space occupied by the additional mounting bracket 35, but also provides effective protection for the power generation component 3 through the mounting frame, reducing the corrosion of the power generation component 3 by the damp and dusty environment of the underground building. The through groove in the mounting frame is connected to the inside of the casing 11, which can ensure smooth airflow inside the casing 11 and prevent the mounting frame from obstructing and affecting ventilation efficiency. At the same time, the mounting structure 1211 on the motor shaft 121 is directly connected to the power generation component 3, which can accurately and efficiently transfer the mechanical energy generated during the operation of the motor to the power generation component 3, reduce energy transmission loss, improve the conversion efficiency of mechanical energy to electrical energy, and provide a stable energy input for subsequent battery energy storage power supply. Furthermore, for wind turbines without the power generation component 3, a circuit interface 112 is provided on the upper side of the casing 11, facilitating quick connection with batteries or other power supply units to achieve a collaborative power supply mode of "two turbines generating power to one turbine". This differentiated design allows wind turbine units 1 with different functions to perform their respective tasks while precisely adapting to the system's energy transmission and power supply needs, improving the overall system's collaborative operation efficiency. At the same time, the modular structural design (such as the standardized setting of the mounting frame and circuit interface 112) facilitates the later inspection and maintenance of the power generation component 3 and circuit connections, reducing the difficulty of operation and maintenance; and the integrated structure reduces the assembly and debugging steps of scattered parts, improving the convenience of installation and operation and maintenance.

[0026] The detachable connection between the cover 111 and the housing 11, the protective design of the mounting frame for the power generation component 3, and the stable fixing of the motor by the mounting bracket all improve the assembly convenience and structural strength of the fan unit 1. They can effectively resist the harsh environmental effects such as humidity, dust, and vibration commonly found in underground buildings, reduce the damage of environmental factors to core components such as the motor, fan blades 122, and power generation component 3, enhance the environmental adaptability and durability of the device, improve the convenience of maintenance, and thus extend the overall service life.

[0027] Example 3: This embodiment provides an energy-saving ventilation system for underground buildings, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0028] The mounting bracket includes: The first frame 131 includes a connecting frame 1311, a support frame 1312 and a fixing ring frame 1313. The connecting frame 1311 is provided with a shaft hole 13111. Multiple support frames 1312 are provided on the outer peripheral surface of the connection. The fixing ring frame 1313 is connected to the outside of the multiple support frames 1312 and abuts against the inner wall surface of the housing 11. The second frame 132 has the same structure as the first frame 131, and the second frame 132 and the first frame 131 are arranged one in front of the other. The dual-head motor 12 is located between the second frame 132 and the first frame 131.

[0029] As can be seen from this embodiment, the mounting frame includes a first frame 131 and a second frame 132; The mounting bracket adopts a double-frame structure with the first frame 131 and the second frame 132 symmetrically arranged front and rear, and the two frames are identical in structure, which can form a precise front and rear clamping and positioning for the dual-head motor 12 located in the middle. This symmetrical clamping method can evenly distribute the fixing force on the motor, avoid motor installation offset or shaking, ensure that the axis of the dual-head motor 12 is consistent with the center of the housing 11, and thus ensure the coaxiality of the rotation of the motor shafts 121 and the fan blades 122 at both ends. It effectively prevents friction interference between the fan blades 122 and the inner wall of the housing 11 when rotating, improves the stability and safety of motor operation, and reduces vibration and noise caused by eccentric operation, thus extending the service life of the motor. Furthermore, both the first frame 131 and the second frame 132 are composed of a connecting frame 1311, a support frame 1312, and a fixing ring frame 1313, forming a three-dimensional stable structure of "core connection - radial support - circumferential fixation". The shaft hole 13111 on the connecting frame 1311 can be precisely matched with the end structure of the motor to achieve the core positioning of the motor and the frame. Multiple support frames 1312 are distributed along the outer circumferential surface of the connecting frame 1311, which can evenly transfer the weight of the motor and the force during operation to the fixing ring frame 1313, thus distributing the load. The fixing ring frame 1313 abuts against the inner wall of the housing 11, realizing the circumferential full fit and fixation of the mounting frame and the housing 11. Compared with local point fixation, this circumferential fit and fixation method has a larger contact area and higher fixation firmness, which can effectively resist the vibration and impact of the fan during operation, avoid relative displacement between the mounting frame and the housing 11, and adapt to the inner wall of the housing 11 with different inner diameter specifications, thus improving the compatibility range between the mounting frame and the housing 11. Furthermore, the mounting bracket adopts a frame structure composed of a connecting bracket 1311, a support bracket 1312, and a fixing ring bracket 1313. The overall design is hollow, which can minimize the obstruction of the airflow channel inside the housing 11 compared to a closed mounting structure. When the airflow flows inside the housing 11, the hollow structure allows the airflow to pass smoothly through the gaps in the mounting bracket, reducing airflow resistance and preventing the reduction of ventilation volume due to obstruction by the mounting bracket. This ensures that the ventilation efficiency of the fan device 1 is not affected. At the same time, the hollow structure can also reduce the weight of the mounting bracket itself, reduce the load-bearing pressure on the housing 11, and improve the structural rationality of the overall device.

[0030] Example 4: This embodiment provides an energy-saving ventilation system for underground buildings, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0031] The wall of the connecting frame 1311 on the adjacent side of the first frame 131 and the second frame 132 is provided with an outwardly extending assembly end 4. The assembly end 4 has a mounting cavity 41 with a connecting shaft hole 13111. The dual-head motor 12 is disposed in the mounting cavity 41.

[0032] As can be seen from this embodiment, the assembly end 4 and the built-in mounting cavity 41 formed by the connecting frame 1311 on the adjacent side of the first frame 131 and the second frame 132 provide a dedicated accommodating and positioning space for the end of the dual-head motor 12, which can form a "wrap-around" limit for the motor and avoid radial offset or axial movement during motor installation; the mounting cavity 41 is connected to the shaft hole 13111 of the connecting frame 1311 to ensure that the motor shaft 121 and the shaft hole 13111 are precisely aligned, further ensuring the coaxiality of the motor shafts 121 at both ends of the dual-head motor 12, effectively preventing frictional interference between the fan blade 122 and the inner wall of the housing 11 when the fan blade 122 rotates, and fundamentally reducing the risk of operational failure caused by motor positioning deviation.

[0033] The extended structure of the assembly end 4 increases the contact area between the connecting frame 1311 and the dual-head motor 12. The wrapping assembly of the mounting cavity 41 on the motor end ensures that the fixing force is evenly distributed on the motor end, which significantly improves the motor's fixing firmness compared to the simple shaft hole 13111 positioning method. When the fan is running, the vibration load generated by the motor can be evenly transmitted to the support frame 1312 and the fixing ring frame 1313 through the assembly end 4, and then dispersed to the housing 11. This avoids deformation of the mounting frame or loosening of the motor caused by localized force concentration, ensuring long-term stable operation of the motor and extending the service life of the motor and mounting frame.

[0034] Example 5: This embodiment provides an energy-saving ventilation system for underground buildings, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0035] A pad 5 is provided on the outer wall of the fixing ring frame 1313, and the fixing ring frame 1313 is fixed to the inner wall of the housing 11 by the pad 5.

[0036] As can be seen from this embodiment, the pad 5 provided on the outer wall of the fixing ring 1313 forms a flexible contact tight fit structure between the mating surface of the fixing ring 1313 and the inner wall of the housing 11. The pad 5 itself has a certain elastic deformation capability. During the process of the mounting bracket being installed into the housing 11, the pad 5 is compressed and deformed, which can fully fill the gap between the fixing ring 1313 and the inner wall of the housing 11, including the tiny gaps caused by processing errors, so as to achieve a tight fit between the two. Compared with the tight fit of rigid contact, it effectively improves the fit and fixing firmness of the mating surface. Moreover, the pad 5 can firmly restrict the circumferential rotation and axial movement of the mounting bracket in the housing 11, ensuring that the mounting bracket and the fixed double-head motor 12 always maintain a stable posture during the operation of the fan, providing a reliable foundation for the smooth operation of the motor.

[0037] The flexible material properties of the pad 5 give it good cushioning and vibration reduction properties, which can effectively block the transmission of vibration generated during the operation of the fan. The vibration generated by the operation of the dual-head motor 12 and the rotation of the fan blade 122 will be transmitted to the mounting frame first, and then buffered and attenuated by the pad 5 on the fixing ring frame 1313, avoiding the vibration from being directly and rigidly transmitted to the housing 11, thereby reducing the resonance noise of the housing 11 caused by vibration and improving the quietness of the operation of the fan device 1. At the same time, the pad 5 can alleviate the vibration friction between the mounting frame and the housing 11, reduce the mechanical wear of both, especially reduce the wear of the outer wall of the fixing ring frame 1313 and the inner wall of the housing 11, and extend the service life of the mounting frame and the housing 11. Furthermore, during machining and assembly, minor errors are inevitable in the inner wall dimensions of the housing 11 and the outer dimensions of the fixing ring 1313. The elastic deformation capability of the liner 5 can effectively compensate for these errors. Even if there is a slight deviation in the dimensions of the housing 11 and the fixing ring 1313, the liner 5 can adjust its shape by compression or rebound to ensure that the two can still form a reliable tight fit. This eliminates the need for high-precision secondary machining of the parts, reduces the difficulty of machining and assembly, improves the compatibility of the mounting bracket with housings 11 of different specifications, and expands the applicability of the mounting bracket.

[0038] Example 6: This embodiment provides an energy-saving ventilation system for underground buildings, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0039] Power generation component 3 includes: Stator 31 is disposed within the mounting frame and has working holes. Rotor 32 is set in the working hole. The shafts 321 at both ends of rotor 32 are connected to brackets 35. The brackets 35 are fixed to the wall of housing 11. Turntable structure 33 is disposed on the shafts 321 at both ends of rotor 32; The transmission belt 34 is connected to the turntable structure 33 and the assembly structure 1211 by a through groove.

[0040] As can be seen from this embodiment, the power generation component 3 includes a stator 31, a rotor 32, a turntable structure 33, and a transmission belt 34; The stator 31 is fixed within the mounting frame to form a stable magnetic field base. The rotor 32 is fixed to the wall of the casing 11 via a bracket 35 and suspended within the working hole of the stator 31, ensuring coaxiality between the rotor 32 and the stator 31 during rotation and preventing magnetic gap deviation from affecting power generation efficiency. The turntable structure 33 is connected to the assembly structure 1211 of the wind turbine unit 1 via a transmission belt 34, which efficiently transmits the mechanical energy generated by the dual-head motor 12 to the rotor 32. The transmission belt 34 has the characteristics of stable transmission ratio and low energy loss, which can minimize the loss of mechanical energy during transmission, ensure the high-speed and stable rotation of the rotor 32, and thus improve the electromagnetic induction efficiency generated by the relative motion between the stator 31 and the rotor 32, achieving efficient conversion of mechanical energy into electrical energy. The stator 31 is integrated into the mounting frame on the upper side of the wind turbine housing 11, and the rotor 32 is fixed to the wall of the housing 11 by the bracket 35. The power generation component 3 is integrated with the wind turbine unit 1, without the need to occupy additional underground building space. The through slot design allows the transmission belt 34 to pass through the mounting frame and connect with the housing 11 to achieve power connection. This does not damage the sealing of the housing 11 and ensures the smoothness of power transmission. At the same time, it avoids interference between the power generation component 3 and the ventilation airflow, fan blades 122 and other components inside the wind turbine. This allows the power generation function and ventilation function to operate independently without affecting each other, perfectly matching the overall structural layout of the wind turbine unit 1.

[0041] Furthermore, the turntable structure 33 is mounted on the shafts 321 at both ends of the rotor 32, and works with the transmission belt 34 to achieve bilateral transmission force. Compared with single-sided transmission, this allows the rotor 32 to be subjected to more balanced force, preventing the rotor 32 from rotating eccentrically due to unilateral tension and reducing frictional losses between the rotor 32 and the stator 31. The transmission belt 34 has a certain elastic buffering capacity, which can absorb the instantaneous vibration impact during the operation of the wind turbine motor, reduce the fluctuation range of the rotor 32's rotation, and ensure the long-term stable operation of the power generation component 3. The fixing method of the bracket 35 to the wall of the casing 11 provides a solid support for the rotor 32, further enhancing the structural stability of the power generation component 3 and extending its service life.

[0042] Example 7: This embodiment provides an energy-saving ventilation system for underground buildings, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0043] The transformer 6 is installed on the circuit of the power generation component 3 and is connected to a power supply line 61, which supplies power to the wind turbine 1 that does not have the power generation component 3 installed.

[0044] As can be seen from this embodiment, the electrical energy output by the power generation component 3 is easily affected by fluctuations in the operating speed of the wind turbine, resulting in unstable voltage and current. The transformer 6 is installed on the circuit of the power generation component 3 and can perform voltage stabilization, rectification, and transformation on the electrical energy output by the power generation component 3, converting the unstable electrical energy into stable electrical energy that meets the power consumption standards of the wind turbine device 1. This avoids the wind turbine device 1 without the power generation component 3 from failing to start, experiencing operational malfunctions, or being damaged by electrical components due to voltage fluctuations, ensuring the continuity and reliability of power supply, and providing power guarantee for the stable operation of the wind turbine device 1.

[0045] The power supply line 61 connected to the transformer 6 directly supplies power to the wind turbine unit 1, which is not equipped with the power generation component 3, thus establishing a directional energy transmission link of "power generation component 3 - transformer 6 - target wind turbine". The transformer 6 can precisely adjust the output power specifications according to the rated power parameters of the target wind turbine (such as rated voltage and rated power), so as to achieve precise matching between the power of the power generation component 3 and the power demand of the target wind turbine and avoid power waste; at the same time, in conjunction with the system design of "two units generating power to one unit", it realizes the directional allocation and efficient utilization of energy, ensuring that the power generated by the power generation component 3 is maximized and improving the overall energy efficiency of the system. Furthermore, the transformer 6 has overvoltage, overcurrent, and short-circuit protection functions. When the output of the generator assembly 3 is abnormal (such as overvoltage or overcurrent) or the power supply line 61 malfunctions (such as a short circuit), the transformer 6 can quickly cut off the circuit or adjust the output to avoid abnormal current / voltage damage to the generator assembly 3, the power supply line 61, and the electrical system of the wind turbine unit 1 without the generator assembly 3, thereby reducing the probability of equipment failure, extending the service life of the circuit and electrical equipment, and reducing system maintenance costs.

[0046] Example 8: This embodiment provides an energy-saving ventilation system for underground buildings, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0047] The mounting box 7 has a compartment box 71 on its upper side; The wind turbine unit 1 and the power generation component 3 are both installed in the mounting box 7, while the transformer 6 and the power supply line 61 are installed in the compartment box 71.

[0048] As can be seen from this embodiment, the separate design of the mounting box 7 and the partition box 71 realizes the functional zoning of "equipment installation" and "circuit control": the power / generator equipment such as the fan unit 1 and the generator assembly 3 are centrally arranged in the mounting box 7, while the electrical components such as the transformer 6 and the power supply line 61 are centrally arranged in the partition box 71. This avoids the vibration and heat generated by the operation of the power equipment from directly affecting the electrical components, reducing the risk of electrical components becoming loose due to vibration and aging due to high temperature. At the same time, the independent arrangement of electrical components in the partition box 71 can effectively isolate the dust and oil generated by the fan unit 1 during operation, preventing them from entering the electrical system and causing safety hazards such as short circuits and leakage, thus improving the overall system's operational safety.

[0049] Example 9: This embodiment provides an energy-saving ventilation system for underground buildings, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0050] The power supply line 61 is connected to the power grid.

[0051] As can be seen from this embodiment, after the power supply line 61 is connected to the power grid, the system forms a dual power supply mode of "autonomous power supply of the power generation component 3 and backup power supply of the power grid": when the power generation component 3 cannot output power due to fan failure, maintenance or other reasons, it can automatically switch to power grid supply to ensure that the fan device 1 without the power generation component 3 continues to operate and avoid the interruption of the ventilation system; conversely, when the power grid fails, the power generation component 3 can independently supply power to the fan device 1, which greatly improves the fault resistance and emergency support capability of the underground building ventilation system and meets the needs of underground buildings for uninterrupted operation of the ventilation system.

[0052] Example 10: This embodiment provides an energy-saving ventilation system for underground buildings, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0053] A control method for an energy-saving ventilation system in an underground building, characterized in that it further includes: S1. The multiple fan devices 1 are grouped into three fan devices 1 as a working unit, with two fan devices 1 in the working unit serving as a power supply unit and one fan device 1 serving as a power consumption unit. S2. Both wind turbine units 1 in the power consumption unit are powered by the power grid. The power generation component 3 converts the mechanical energy generated by the rotation of the wind turbine unit 1 into electrical energy, and supplies energy to the power consumption unit through the transformer 6 and the power supply line 61.

[0054] S3. The fan unit 1 at the power consumption unit is normally closed and starts when needed. The power supply line 61 supplies power to the grid in the normally closed state and supplies power to the fan unit 1 when needed.

[0055] As can be seen from this embodiment, the control method divides the three wind turbine units 1 into working units of "dual power supply unit + single power consumption unit", which clarifies the division of labor between energy production and consumption: the power supply unit wind turbine unit 1 recovers mechanical energy and converts it into electrical energy through the power generation component 3, and supplies it to the power consumption unit in a targeted manner, realizing the internal closed-loop utilization of energy and reducing dependence on the power grid; when the power consumption unit is normally closed, the surplus electrical energy generated by the power supply unit is connected to the grid for transmission, further tapping the energy-saving potential. Through a refined energy allocation strategy, the redundant energy of the wind turbine operation is fully recovered, which greatly improves the overall energy-saving efficiency of the system.

[0056] The power supply unit fan device 1 adopts a "normally closed + on-demand start" operation mode, which can be flexibly adjusted according to the actual ventilation needs of the underground building (such as personnel flow, harmful gas concentration, temperature and humidity changes): during low demand periods, it remains normally closed, relying solely on the power supply unit fan to meet basic ventilation needs and reduce overall energy consumption; during high demand periods, the power supply unit is started to quickly increase ventilation volume and ensure environmental safety. At the same time, the power supply line 61 can switch between "grid-connected power supply" and "power supply to the fan" modes according to the status of the power supply unit, which avoids energy waste and ensures power supply when the power supply unit is started, achieving precise matching between the operation mode and actual needs.

[0057] The power-consuming unit fan unit 1 is normally kept off and only started when necessary, significantly reducing the equipment's operating time and slowing down the wear and aging of core components such as the fan motor, fan blades 122, and bearings. The power supply unit fan unit 1 operates continuously but its energy is recovered and utilized, avoiding the waste of "idling energy consumption." At the same time, the stable operating state reduces the impact losses caused by frequent start-stop cycles. Overall, this differentiated operating strategy balances equipment use and wear, effectively extending the overall service life of the fan unit 1 and reducing equipment replacement and maintenance costs.

[0058] This method achieves a synergistic improvement in energy efficiency, operational flexibility, and equipment reliability. Its clear energy allocation mechanism maximizes the recovery of redundant energy and reduces grid dependence; the on-demand start-stop operation mode precisely adapts to ventilation needs, avoiding ineffective energy consumption; and the flexible power supply switching and dual power supply unit design ensure system operational stability while optimizing equipment losses. Overall, this control method combines the energy-saving potential of hardware equipment with the refined advantages of software management, forming a complete energy-saving closed loop of "energy recovery - internal utilization - surplus grid connection." It not only meets the ventilation safety requirements of underground buildings but also significantly reduces operating costs, providing key methodological support for the energy-saving and intelligent operation of underground building ventilation systems, and possesses outstanding practical value and promising prospects for promotion. The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific implementation methods described above. The specific implementation methods described above are merely illustrative and not restrictive. Those skilled in the art, under the guidance of this application, can make many other forms without departing from the spirit and scope of the claims, all of which fall within the protection scope of this application.

Claims

1. An energy-saving ventilation system for underground buildings, characterized in that, include: A wind turbine device (1) is provided, and multiple wind turbine devices (1) are connected to a power generation component (3). Ventilation duct (2), the ventilation duct (2) includes a body (21) and a plurality of connecting pipes (22), the plurality of connecting pipes (22) being respectively connected to a plurality of fan devices (1); A power generation component (3) is mounted on a wind turbine device (1) and connected to a battery, which supplies power to the wind turbine device (1). Among them, any two of the multiple wind turbine units (1) are equipped with a power generation component (3) and supply power to one wind turbine unit (1), and the three wind turbine units (1) are used in combination.

2. The energy-saving ventilation system for underground buildings according to claim 1, characterized in that, The fan unit (1) includes: The housing (11) has open ports at both ends, and one open port of the housing (11) is connected to one of the multiple connecting pipes (22) in a constricted shape. The other open port of the housing (11) is connected to a cover (111), and the cover (111) is provided with a ventilation end (1111). A dual-head motor (12) is provided with motor shafts (121) at both ends of the dual-head motor (12), and fan blades (122) are connected to each motor shaft (121). Mounting bracket, wherein the mounting bracket is located inside the housing (11) with one open port connected to the cover (111) and the dual-head motor (12) is fixed inside the housing (11); Among them, the upper side of the casing (11) of the wind turbine device (1) equipped with the power generation component (3) is provided with an installation frame, the power generation component (3) is installed in the installation frame, and the installation frame is provided with a through groove that communicates with the inside of the casing (11); Among them, the motor shaft (121) of the wind turbine device (1) equipped with the power generation component (3) is provided with an assembly structure (1211), which is connected to the power generation component (3). Among them, the wind turbine device (1) without the power generation component (3) has a circuit interface (112) on the upper side of the casing (11).

3. The energy-saving ventilation system for underground buildings according to claim 2, characterized in that the mounting frame... include: The first frame (131) includes a connecting frame (1311), a support frame (1312) and a fixing ring frame (1313). The connecting frame (1311) is provided with a shaft hole (13111). Multiple support frames (1312) are provided on the outer peripheral surface of the connection. The fixing ring frame (1313) is connected to the outside of the multiple support frames (1312) and abuts against the inner wall surface of the housing (11). The second frame (132) has the same structure as the first frame (131), and the second frame (132) and the first frame (131) are arranged one in front of the other. The dual-head motor (12) is located between the second frame (132) and the first frame (131).

4. The energy-saving ventilation system for underground buildings according to claim 3, characterized in that, The wall of the connecting frame (1311) on the adjacent side of the first frame (131) and the second frame (132) is provided with an assembly end (4) extending outward. The assembly end (4) has a mounting cavity (41) with a connecting shaft hole (13111) formed inside. The dual-head motor (12) is located in the mounting cavity (41).

5. The energy-saving ventilation system for underground buildings according to claim 4, characterized in that, A pad (5) is provided on the outer wall of the fixing ring frame (1313), and the fixing ring frame (1313) is fixed to the inner wall of the housing (11) by the pad (5).

6. The energy-saving ventilation system for underground buildings according to claim 5, characterized in that, The power generation component (3) includes: Stator (31), the stator (31) is disposed in the mounting frame, and the stator (31) is provided with working holes; Rotor (32), the rotor (32) is set in the working hole, and the shafts (321) at both ends of the rotor (32) are connected to brackets (35), the brackets (35) are fixed to the wall of the housing (11); A turntable structure (33) is provided on the shafts (321) at both ends of the rotor (32); The transmission belt (34) is connected by a through groove to a turntable structure (33) and an assembly structure (1211).

7. The energy-saving ventilation system for underground buildings according to claim 6, characterized in that, it also... include: A transformer (6) is installed on the circuit of the power generation component (3) and the transformer (6) is connected to a power supply line (61) which supplies power to the wind turbine (1) that is not equipped with the power generation component (3).

8. The energy-saving ventilation system for underground buildings according to claim 7, characterized in that, it also... include: The mounting box (7) has a compartment box (71) on its upper side. The wind turbine (1) and the power generation component (3) are both installed in the mounting box (7), and the transformer (6) and the power supply line (61) are installed in the compartment box (71).

9. An energy-saving ventilation system for underground buildings according to claim 8, characterized in that, The power supply line (61) is connected to the power grid.

10. A control method for an energy-saving ventilation system in an underground building according to any one of claims 1-9, characterized in that, it further includes... include: S1. The multiple fan devices (1) are divided into three fan devices (1) as a working unit, with two fan devices (1) in the working unit as a power supply unit and one fan device (1) as a power consumption unit; S2. Both fan units (1) in the power consumption unit are powered by the power grid. The power generation component (3) converts the mechanical energy generated by the rotation of the fan unit (1) into electrical energy and supplies energy to the power consumption unit through the transformer (6) and the power supply line (61). S3. The fan unit (1) in the power consumption unit is normally closed and starts when needed. The power supply line (61) supplies power to the power grid in the normally closed state and supplies power to the fan unit (1) when needed.

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