A single-motor, dual-impeller high-efficiency fan system

Abstract

This utility model relates to the field of portable fan technology, specifically to a single-motor, dual-impeller high-efficiency fan system. It includes a housing, within which a drive motor is fixedly connected. A first centrifugal impeller and a second centrifugal impeller are respectively connected to the two ends of the drive motor's drive shaft. An air inlet shroud is fixedly connected to one end of the housing, and an air outlet shroud is fixedly connected to the end of the housing furthest from the air inlet shroud. Air guide plates are installed between the housing and the air inlet shroud, and between the housing and the air outlet shroud, with the two air guide plates corresponding to the air outlet ends of the first and second centrifugal impellers. This application adopts a single-motor-driven dual-impeller design, which, compared to traditional fan systems using two motors to drive two impellers respectively, reduces the number of motors, effectively saves space, and makes the entire fan system structure more compact. Furthermore, by setting up air guide plates, the airflow path within the housing is optimized, reducing airflow resistance and energy loss, and improving the energy utilization efficiency of the fan system.

Description

Technical Field

[0001] This utility model relates to the field of portable fan technology, specifically to a single-motor dual-impeller high-efficiency fan system. Background Technology

[0002] In industrial ventilation, equipment cooling, and gas transport, fans are key fluid machinery whose performance directly affects the operating efficiency of the entire system. As industrial production demands increasingly higher flow rates and pressures for gas transport, traditional single-impeller fans often struggle to meet the requirements of high pressure and large flow rates. Therefore, dual-impeller fans, capable of achieving higher gas kinetic energy output through multi-stage pressurization, are gradually becoming an important choice for addressing these demands.

[0003] Currently, most dual-impeller fans on the market adopt a dual-motor drive mode, where two independent motors drive two impellers respectively. While this design can achieve two-stage pressurization, the dual-motor configuration increases the overall size and weight of the equipment, limiting the fan's installation and layout in confined spaces, reducing flexibility, and leading to increased procurement and energy costs. Furthermore, since the two impellers in a traditional dual-impeller fan are driven by independent motors, their rotational speeds are difficult to synchronize completely, easily causing turbulence in the airflow at the impeller junction, increasing local resistance. Simultaneously, if the high-speed rotating airflow discharged from the impeller cannot be effectively guided, its tangential velocity will be converted into useless eddy current losses, resulting in energy waste and reducing the fan's energy efficiency.

[0004] Therefore, optimizing the airflow path inside the fan, reducing airflow resistance and energy loss, and improving the energy efficiency of the fan system are problems that urgently need to be solved by those skilled in the art. Utility Model Content

[0005] In order to optimize the airflow path inside the fan, reduce airflow resistance and energy loss, and improve the energy utilization efficiency of the fan system, this application provides a single-motor dual-impeller high-efficiency fan system.

[0006] The single-motor, dual-impeller high-efficiency fan system provided in this application adopts the following technical solution:

[0007] A single-motor, dual-impeller high-efficiency fan system includes a housing, a motor bracket fixedly connected inside the housing, a drive motor fixedly connected to the motor bracket, a drive shaft of the drive motor passing through both ends of the drive motor and respectively driving a first centrifugal impeller and a second centrifugal impeller, an air inlet shroud fixedly connected to one end of the housing, and an air outlet shroud fixedly connected to the end of the housing away from the air inlet shroud; air guide plates are installed between the housing and the air inlet shroud and between the housing and the air outlet shroud, with the two air guide plates respectively positioned at the air outlet ends of the first centrifugal impeller and the second centrifugal impeller.

[0008] Furthermore, the first centrifugal impeller includes a first drive disk, which is drivenly connected to the drive shaft of the drive motor. A plurality of first air inlet blades arranged in a centrally symmetrical manner are fixedly connected to the first drive disk. A first air inlet end plate is installed at the end of the first air inlet blades away from the first drive disk. A first air inlet hole is opened at the center of the first air inlet end plate corresponding to the first air inlet blade. A first oblique air outlet is formed between two adjacent first air inlet blades between the first drive disk and the first air inlet end plate.

[0009] Furthermore, each of the second centrifugal impellers includes a second drive disk, which is drivenly connected to the drive shaft of the drive motor. Several second air inlet blades arranged in a centrally symmetrical manner are fixedly connected to the second drive disk. A second air inlet end plate is installed at the end of the second air inlet blade away from the second drive disk. A second air inlet hole is opened at the center of the second air inlet end plate corresponding to the second air inlet blade. A second oblique air outlet is formed between the second drive disk and the second air inlet end plate between adjacent second air inlet blades.

[0010] Furthermore, the air guide plate includes a mounting sleeve and a core plate. A plurality of air guide vanes are fixedly connected between the mounting sleeve and the core plate in a ring shape. The air guide vanes are obliquely arranged, and the oblique direction of the air guide vanes is consistent with the rotation direction of the first centrifugal impeller and the second centrifugal impeller. An obliquely arranged air guide opening is formed between two adjacent air guide vanes.

[0011] Furthermore, an air collection tube and an air stop tube are fixedly installed inside the housing. The surface of the air stop tube has a smooth curved surface corresponding to the second air inlet end plate. The air collection tube is fixedly connected to the air stop tube, and one end of the air collection tube near the second centrifugal impeller extends into the second air inlet hole of the second centrifugal impeller.

[0012] Furthermore, the inner surface of the air inlet hood has a smooth curved surface corresponding to the first air inlet end plate, and an exhaust duct is integrally formed inside the air inlet hood, which extends into the first air inlet hole of the first centrifugal impeller; the air outlet hood has a smooth surface with a rounded transition inside, and an exhaust duct is provided on the air outlet hood corresponding to the smooth surface.

[0013] Furthermore, two one-way clutches are respectively provided at both ends of the drive shaft of the drive motor. A main rotating rod and a tail rotating rod, which are coaxially arranged with the drive shaft of the drive motor, are respectively connected to the two one-way clutches. The first centrifugal impeller is fixedly installed on the main rotating rod, and the second centrifugal impeller is fixedly installed on the tail rotating rod.

[0014] Furthermore, a wind speed sensor is installed inside the housing between the first centrifugal impeller and the second centrifugal impeller. The wind speed sensor is electrically connected to a controller, and the controller is electrically connected to the drive motor.

[0015] Furthermore, the two ends of the housing are respectively provided with a first mounting part corresponding to the air inlet hood and the air outlet hood, and the air inlet hood and the air outlet hood are respectively provided with a second mounting part corresponding to the first mounting part, and the first mounting part and the second mounting part are connected by bolts.

[0016] Furthermore, a first sealing ring is fixedly installed on each of the two air guide plates corresponding to the housing, and the two first sealing rings abut against the two air guide plates and the housing respectively. A second sealing ring is installed on each air guide plate corresponding to the air inlet hood, and the second sealing ring abuts against the air guide plate and the air inlet hood. A third sealing ring is installed on each air guide plate corresponding to the air outlet hood, and the third sealing ring abuts against the air guide plate and the air outlet hood. In summary, this application includes at least one of the following beneficial technical effects:

[0017] This application employs a single-motor driven dual-impeller design. Compared to traditional fan systems that use two motors to drive two impellers respectively, this reduces the number of motors, effectively saving space and making the entire fan system structure more compact. This compact design not only facilitates the installation and layout of the fan system within limited space but also reduces motor procurement costs, motor control system costs, and related electrical connection costs. Furthermore, by rationally setting the air guide vanes, the airflow path within the casing is optimized, reducing airflow resistance and energy loss, and improving the energy utilization efficiency of the fan system. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of one embodiment of this application.

[0019] Figure 2 This is a structural exploded view of one embodiment of this application.

[0020] Figure 3 This is a schematic diagram of the internal structure of one embodiment of this application.

[0021] Figure 4 This is a schematic diagram of the installation structure of the first centrifugal impeller according to an embodiment of this application.

[0022] Figure 5 This is a schematic diagram of the installation structure of the second centrifugal impeller according to one embodiment of this application.

[0023] Figure 6 This is a schematic diagram of the installation structure of a one-way clutch according to an embodiment of this application.

[0024] Figure 7 This is a schematic diagram of the installation structure of a wind speed sensor according to an embodiment of this application.

[0025] Explanation of reference numerals in the attached drawings: 100, housing; 101, motor bracket; 102, air inlet hood; 103, air outlet hood; 104, air guide plate; 1041, mounting sleeve; 1042, plate core; 1043, air guide vane; 1044, air inlet; 105, air collection tube; 106, windproof tube; 107, exhaust tube; 108, main rotating rod; 109, tail rotating rod; 110, one-way clutch; 111, wind speed sensor; 112, first mounting part; 113, second mounting part; 114, first... 115. Sealing ring; 116. Second sealing ring; 117. Third sealing ring; 118. Exhaust duct; 200. Drive motor; 300. First centrifugal impeller; 301. First drive disc; 302. First air inlet blade; 303. First air inlet end plate; 304. First air inlet hole; 305. First oblique air outlet; 400. Second centrifugal impeller; 401. Second drive disc; 402. Second air inlet blade; 403. Second air inlet end plate; 404. Second air inlet hole; 405. Second oblique air outlet. Detailed Implementation

[0026] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0027] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0029] This application discloses a single-motor, dual-impeller high-efficiency fan system.

[0030] Please refer to Figures 1 to 7 In one embodiment of this application, a single-motor dual-impeller high-efficiency fan system includes a housing 100, a motor bracket 101 fixedly connected inside the housing 100, a drive motor 200 fixedly connected to the motor bracket 101, a drive shaft of the drive motor 200 passing through both ends of the drive motor 200 and respectively drivingly connecting a first centrifugal impeller 300 and a second centrifugal impeller 400, an air inlet shroud 102 fixedly connected to one end of the housing 100, and an air outlet shroud 103 fixedly connected to the end of the housing 100 away from the air inlet shroud 102; air guide plates 104 are installed between the housing 100 and the air inlet shroud 102 and between the housing 100 and the air outlet shroud 103, and the two air guide plates 104 are respectively arranged at the air outlet ends of the first centrifugal impeller 300 and the second centrifugal impeller 400.

[0031] During operation, when the single-motor dual-impeller high-efficiency fan system starts, the drive motor 200 begins to run, and the drive shaft drives the first centrifugal impeller 300 and the second centrifugal impeller 400 to rotate synchronously. Outside air is drawn into the housing 100 by the rotation of the first centrifugal impeller 300. After being accelerated by the first centrifugal impeller 300, the air is initially guided by the guide vane 104 and continues to flow forward within the housing 100 to the second centrifugal impeller 400, where it is further accelerated, giving the air greater kinetic energy.

[0032] Please refer to Figures 1 to 7 In one embodiment of this application, the first centrifugal impeller 300 includes a first drive disk 301, which is connected to the drive shaft of the drive motor 200. A plurality of first air inlet blades 302 arranged in a centrally symmetrical manner are fixedly connected to the first drive disk 301. A first air inlet end plate 303 is installed at the end of the first air inlet blade 302 away from the first drive disk 301. A first air inlet hole 304 is opened at the center of the first air inlet end plate 303 corresponding to the first air inlet blade 302. A first oblique air outlet 305 is formed between two adjacent first air inlet blades 302 and the first air inlet end plate 303.

[0033] During operation, after the drive motor 200 starts, it drives the first drive disc 301 to rotate at high speed. Under the action of centrifugal force and negative pressure, air is drawn in through the first air inlet hole 304 of the first air inlet end plate 303. Air then enters the space formed between the two adjacent first air inlet blades 302, the first drive disc 301, and the first air inlet end plate 303. As the first drive disc 301 rotates, the first air inlet blades 302 exert force on the air, pushing it along the blade surface towards the oblique air outlet. During this process, the air continuously gains kinetic energy, and its velocity gradually increases. The accelerated air reaches the first oblique air outlet 305. Due to the inclined design of the first oblique air outlet 305, the air is thrown out of the first centrifugal impeller 300 at high speed and high pressure, and then enters the subsequent guide plate 104 for guidance. Through the unique structural design of the first centrifugal impeller 300, the efficiency of the fan system in handling air intake and acceleration is effectively improved.

[0034] Please refer to Figures 1 to 7 In one embodiment of this application, the second centrifugal impeller 400 includes a second drive disk 401, which is tractively connected to the drive shaft of the drive motor 200. A plurality of second air inlet blades 402 arranged in a centrally symmetrical manner are fixedly connected to the second drive disk 401. A second air inlet end plate 403 is installed at the end of the second air inlet blade 402 away from the second drive disk 401. A second air inlet hole 404 is opened at the center of the second air inlet end plate 403 corresponding to the second air inlet blade 402. A second oblique air outlet 405 is formed between the second drive disk 401 and the second air inlet end plate 403 of the adjacent second air inlet blades 402.

[0035] During operation, the air pressurized by the first centrifugal impeller 300 is guided by the air guide plate 104 and then axially enters the second centrifugal impeller 400 through the second air inlet hole 404 of the second air inlet end plate 403. At the same time, the second drive plate 401 rotates synchronously with the drive shaft, driving the second air inlet blades 402 to apply centrifugal force to the introduced air, further increasing the air velocity, so that the air is discharged at high speed in a spiral shape through the second oblique air outlet 405.

[0036] By working in concert with the first centrifugal impeller 300, the second centrifugal impeller 400 achieves efficient two-stage pressurization of air, thereby improving the working efficiency of the fan system and optimizing the stability of airflow.

[0037] Please refer to Figures 1 to 7In one embodiment of this application, the air guide plate 104 includes a mounting sleeve 1041 and a core plate 1042. A plurality of air guide plates 1043 are fixedly connected between the mounting sleeve 1041 and the core plate 1042 in an annular arrangement. The air guide plates 1043 are obliquely arranged, and the oblique direction of the air guide plates 1043 is consistent with the rotation direction of the first centrifugal impeller 300 and the second centrifugal impeller 400. An obliquely arranged air guide port 1044 is formed between two adjacent air guide plates 1043.

[0038] During operation, the high-speed rotating airflow obliquely discharged from the first centrifugal impeller 300 and the second centrifugal impeller 400 enters the interior of the two guide vanes 104 axially. When the airflow enters the guide port 1044 formed by adjacent guide vanes 1043, because the inclination direction of the guide vanes 1043 is consistent with the rotation direction of the first centrifugal impeller 300 and the second centrifugal impeller 400, the tangential velocity component of the airflow is partially absorbed and converted into axial velocity, allowing the airflow to pass through the guide vanes 104 at a stable axial velocity and enter the next stage. Through its uniquely designed obliquely oriented guide vanes 1043, the guide vanes 104 effectively optimize the high-speed rotating airflow discharged from the first centrifugal impeller 300 and the second centrifugal impeller 400, reducing energy loss and improving the efficiency of the entire fan system.

[0039] Please refer to Figures 1 to 7 In one embodiment of this application, a wind collector 105 and a wind stop 106 are fixedly installed inside the housing 100. The surface of the wind stop 106 is provided with a smooth curved surface corresponding to the second air inlet end plate 403. The wind collector 105 is fixedly connected to the wind stop 106 by bolts. One end of the wind collector 105 near the second centrifugal impeller 400 extends into the second air inlet hole 404 of the second centrifugal impeller 400.

[0040] During operation, the gas is pressurized and ejected by the first centrifugal impeller 300, then guided by the air guide plate 104 before entering the interior of the housing 100. At this time, the air collection tube 105 extends to one end of the second air inlet 404 to gather and guide the dispersed airflow, so that the air can flow into the air inlet of the second centrifugal impeller 400 accurately and evenly, reducing the diffusion of air and energy loss inside the housing.

[0041] Simultaneously, the air entering the second centrifugal impeller 400 rotates at high speed under the action of the impeller and is then pressurized and thrown out. The surface of the windproof sleeve 106 corresponds to the smooth curved surface of the second air inlet end plate 403, conforming to the trajectory of the rotating airflow of the second centrifugal impeller 400, effectively blocking the air from diffusing in the non-outlet direction, forcing the airflow to flow only along the outlet direction of the second centrifugal impeller 400, and preventing the airflow from forming turbulence inside the housing 100.

[0042] The air intake duct 105 and the air stop duct 106 are fixedly connected by bolts, maintaining stability and continuous cooperation during operation to ensure that the airflow flows efficiently and orderly inside the housing 100, providing support for the fan to achieve high air pressure and large flow output.

[0043] Please refer to Figures 1 to 7 In one embodiment of this application, the inner surface of the air inlet hood 102 is provided with a smooth curved surface corresponding to the first air inlet end plate 303, and an exhaust duct 117 is integrally formed inside the air inlet hood 102. The inner end of the exhaust duct 117 extends into the first air inlet hole 304 of the first centrifugal impeller 300. The air outlet hood 103 is provided with a smooth surface with a rounded transition, and an exhaust duct 107 is provided on the air outlet hood 103 corresponding to the smooth surface. The exhaust duct 107 is offset from the central axis of the housing 100.

[0044] During operation, outside air enters through the exhaust duct 117 of the air inlet hood 102. Since the air inlet hood 102 extends into the first air inlet 304, it enhances the power of air intake and reduces intake losses. The smooth curved surface design also suppresses airflow swirl within the fan, ensuring that air enters the guide plate 104 in a near-axial direction, improving the impeller's work efficiency. The high-speed rotating airflow discharged from the second centrifugal impeller 400 enters the exhaust hood 103 and flows along the smooth surface, thus guiding the airflow more smoothly out of the exhaust duct, reducing turning losses, and preventing the formation of dead zones or localized high-pressure areas within the exhaust hood, thereby improving the efficiency and stability of exhaust.

[0045] Please refer to Figures 1 to 7 In one embodiment of this application, two one-way clutches 110 are respectively provided at both ends of the drive shaft of the drive motor 200. The two one-way clutches 110 are respectively connected to a main rotating rod 108 and a tail rotating rod 109 coaxially arranged with the drive shaft of the drive motor 200. The first centrifugal impeller 300 is fixedly installed on the main rotating rod 108, and the second centrifugal impeller 400 is fixedly installed on the tail rotating rod 109.

[0046] When the drive motor 200 starts, the drive shaft begins to rotate. At this time, the one-way clutch 110 is engaged, thereby transmitting power to the main rotating rod 108 and the tail rotating rod 109 to rotate synchronously, enabling the fan to operate normally. Simultaneously, while the motor continues to operate, the one-way clutch 110 remains engaged to ensure stable power transmission. When the drive motor 200 is de-energized and stops rotating, the main rotating rod 108 and the tail rotating rod 109 will continue to rotate for a period of time due to inertia. At this time, the one-way clutch 110 automatically disengages, cutting off the connection between the main rotating rod 108, the tail rotating rod 109, and the drive shaft of the drive motor 200, thus preventing the motor from being subjected to reverse torque impact.

[0047] Meanwhile, in complex operating conditions where there is airflow backflow or large wind pressure fluctuations, the one-way clutch 110 can effectively prevent the first centrifugal impeller 300 and the second centrifugal impeller 400 from rotating in opposite directions under the action of backflow, thereby avoiding damage to the drive motor 200 and enabling the fan system to operate stably in harsher environments.

[0048] Please refer to Figures 1 to 7 In one embodiment of this application, a wind speed sensor 111 is installed inside the housing 100 between the first centrifugal impeller 300 and the second centrifugal impeller 400. The wind speed sensor 111 is electrically connected to a controller, and the controller is electrically connected to the drive motor 200.

[0049] During operation, the wind speed sensor 111 continuously collects airflow velocity data within the housing 100. The sensor converts the physical quantity of wind speed into an electrical signal, which is transmitted to the controller via a shielded cable. After receiving the wind speed data, the controller compares it with a preset target wind speed value and calculates the deviation. When the wind speed is lower than the target value, the controller outputs a signal to increase the input voltage of the drive motor 200, thereby increasing the impeller speed; conversely, it decreases the speed. After the motor speed is adjusted, the wind speed sensor 111 detects the wind speed change in real time, forming a closed-loop feedback. The controller readjusts the control signal based on the new wind speed data until the wind speed stabilizes within the target range.

[0050] The intelligent control based on real-time wind speed feedback through wind speed sensor 111 and controller significantly improves the wind turbine system's adaptability to operating conditions and its working efficiency, while also enhancing the safety and reliability of the wind turbine system.

[0051] Please refer to Figures 1 to 7 In one embodiment of this application, the two ends of the housing 100 are respectively provided with a first mounting part 112 corresponding to the air inlet cover 102 and the air outlet cover 103, and the air inlet cover 102 and the air outlet cover 103 are respectively provided with a second mounting part 113 corresponding to the first mounting part 112, and the first mounting part 112 and the second mounting part 113 are connected by bolts.

[0052] During operation, the positioning structure of the first mounting part 112 and the second mounting part 113 ensures the precise positioning of each component, avoiding airflow leakage or vibration problems caused by installation deviations. Simultaneously, the bolted connection of the first mounting part 112 and the second mounting part 113 tightly cooperates to withstand the vibration forces generated by internal airflow pressure and impeller rotation, preventing relative displacement between the inlet shroud 102, the outlet shroud 103, and the casing 100, ensuring a stable airflow channel inside the fan. Even under high air pressure and high speed conditions, this rigid connection structure maintains the stability of the overall structure, ensuring continuous and efficient fan operation. When maintenance, repair, or component replacement is required, the inlet shroud 102 and the outlet shroud 103 can be separated from the casing 100 by loosening the bolts with tools. This detachable connection method allows technicians to quickly access key components such as the impeller and guide vanes, significantly shortening maintenance time and ensuring both the structural strength and performance stability of the fan while improving production and maintenance efficiency.

[0053] Please refer to Figures 1 to 7 In one embodiment of this application, a first sealing ring 114 is fixedly installed on each of the two air guide plates 104 corresponding to the housing 100. The two first sealing rings 114 abut against the two air guide plates 104 and the housing 100 respectively. A second sealing ring 115 is installed on the air guide plate 104 corresponding to the air inlet cover 102. The second sealing ring 115 abuts against the air guide plate 104 and the air inlet cover 102. A third sealing ring 116 is installed on the air guide plate 104 corresponding to the air outlet cover 103. The third sealing ring 116 abuts against the air guide plate 104 and the air outlet cover 103.

[0054] During operation, the first sealing ring 114 prevents airflow leakage between the guide plate 104 and the housing 100, ensuring that airflow can only flow inside the housing along the designed path. The second sealing ring 115 prevents airflow from overflowing between the guide plate 104 and the inlet hood 102. The third sealing ring 116 prevents airflow from overflowing between the guide plate 104 and the outlet hood 103. Even under high wind pressure and high speed conditions, the sealing rings maintain a tight seal due to their elastic deformation capacity, preserving the integrity of the airflow channel inside the fan. When the fan stops running, the sealing rings remain compressed, preventing external dust and debris from entering the fan through gaps. The design of the first sealing ring 114 and the second sealing ring 115 effectively solves the airflow leakage problem during fan operation, significantly improving the fan's efficiency, stability, and reliability.

[0055] The implementation principle of a single-motor dual-impeller high-efficiency fan system in this application embodiment is as follows: through the core design of driving dual impellers with a single motor, efficient air pressurization and transportation are achieved.

[0056] When the drive motor 200 starts, its drive shaft simultaneously drives the main rotating rod 108 and the tail rotating rod 109 to rotate via the one-way clutch 110, thereby causing the first centrifugal impeller 300 and the second centrifugal impeller 400 to operate synchronously. Outside air is drawn in through the exhaust duct 117 of the air inlet shroud 102 by the first air inlet blades 302, accelerated, and then ejected from the first oblique air outlet 305, entering the corresponding air guide plate 104. This air guide plate 104, through obliquely arranged guide vanes 1043 aligned with the impeller rotation direction, converts the tangential velocity of the rotating airflow into axial velocity, reducing energy loss.

[0057] The air, initially pressurized and guided, flows precisely into the second air inlet 404 of the second centrifugal impeller 400 under the convergence and guidance of the air collection duct 105. The second centrifugal impeller 400 further accelerates and pressurizes the air, which is then discharged from the second oblique air outlet 405 and enters another air guide plate 104 for the same airflow optimization. The smooth curved surface of the wind deflector 106 effectively blocks airflow diffusion, avoids turbulence, and ensures that the airflow flows along the designed path.

[0058] Finally, the air, after being pressurized in two stages, is stably guided to the exhaust duct 107 through the smooth transition surface of the exhaust hood 103 and discharged. During this process, the wind speed sensor 111 monitors the airflow velocity inside the housing 100 in real time, and the controller dynamically adjusts the speed of the drive motor 200 based on the monitoring data, forming a closed-loop control to ensure efficient operation of the fan. At the same time, the components are securely assembled through bolt connections between the first mounting part 112 and the second mounting part 113, and the sealing effect of the first sealing ring 114, the second sealing ring 115, and the third sealing ring 116 prevents airflow leakage, further improving system efficiency and stability.

[0059] The entire system drives the first centrifugal impeller 300 and the second centrifugal impeller 400 to work together through the drive motor 200. Combined with the optimized design of the air guiding and concentrating structure, intelligent speed control, and reliable sealing and connection methods, it achieves efficient air pressurization and stable air delivery while reducing the number of motors, saving space and cost, and greatly improving the energy utilization efficiency and operating condition adaptability of the fan system.

[0060] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A single-motor, dual-impeller high-efficiency fan system, characterized in that: The device includes a housing (100), a motor bracket (101) fixedly connected inside the housing (100), a drive motor (200) fixedly connected on the motor bracket (101), a drive shaft of the drive motor (200) passing through both ends of the drive motor (200) and respectively drivingly connecting a first centrifugal impeller (300) and a second centrifugal impeller (400), an air inlet hood (102) fixedly connected to one end of the housing (100), and an air outlet hood (103) fixedly connected to the end of the housing (100) away from the air inlet hood (102); air guide plates (104) are installed between the housing (100) and the air inlet hood (102) and between the housing (100) and the air outlet hood (103), and the two air guide plates (104) are respectively arranged at the air outlet ends of the first centrifugal impeller (300) and the second centrifugal impeller (400).

2. The single-motor, dual-impeller high-efficiency fan system according to claim 1, characterized in that: The first centrifugal impeller (300) includes a first drive disk (301), which is connected to the drive shaft of the drive motor (200). A plurality of first air inlet blades (302) arranged in a centrally symmetrical manner are fixedly connected to the first drive disk (301). A first air inlet end plate (303) is installed at the end of the first air inlet blade (302) away from the first drive disk (301). A first air inlet hole (304) is opened at the center of the first air inlet end plate (303) corresponding to the first air inlet blade (302). A first oblique air outlet (305) is formed between two adjacent first air inlet blades (302) and the first drive disk (301) and the first air inlet end plate (303).

3. The single-motor, dual-impeller high-efficiency fan system according to claim 1, characterized in that: Each of the second centrifugal impellers (400) includes a second drive disk (401), which is connected to the drive shaft of the drive motor (200). A plurality of second air inlet blades (402) arranged in a centrally symmetrical manner are fixedly connected to the second drive disk (401). A second air inlet end plate (403) is installed at the end of the second air inlet blade (402) away from the second drive disk (401). A second air inlet hole (404) is opened at the center of the second air inlet end plate (403) corresponding to the second air inlet blade (402). A second oblique air outlet (405) is formed between the second drive disk (401) and the second air inlet end plate (403) of the adjacent second air inlet blade (402).

4. The single-motor, dual-impeller high-efficiency fan system according to claim 1, characterized in that: The air guide plate (104) includes a mounting sleeve (1041) and a core plate (1042). A plurality of air guide plates (1043) are fixedly connected between the mounting sleeve (1041) and the core plate (1042) in an annular arrangement. The air guide plates (1043) are obliquely arranged, and the oblique direction of the air guide plates (1043) is consistent with the rotation direction of the first centrifugal impeller (300) and the second centrifugal impeller (400). An obliquely arranged air guide port (1044) is formed between two adjacent air guide plates (1043).

5. A single-motor, dual-impeller high-efficiency fan system according to claim 3, characterized in that: The housing (100) is fixedly installed with an air collection tube (105) and an air stop tube (106). The surface of the air stop tube (106) is provided with a smooth curved surface corresponding to the second air inlet end plate (403). The air collection tube (105) is fixedly connected to the air stop tube (106). The end of the air collection tube (105) near the second centrifugal impeller (400) extends into the second air inlet hole (404) of the second centrifugal impeller (400).

6. The single-motor, dual-impeller high-efficiency fan system according to claim 2, characterized in that: The inner surface of the air inlet hood (102) is provided with a smooth curved surface corresponding to the first air inlet end plate (303). An exhaust duct (117) is integrally formed inside the air inlet hood (102), and the exhaust duct (117) extends into the first air inlet hole (304) of the first centrifugal impeller (300). The air outlet hood (103) is provided with a smooth surface with a rounded transition, and an exhaust duct (107) is provided on the air outlet hood (103) corresponding to the smooth surface.

7. The single-motor, dual-impeller high-efficiency fan system according to claim 1, characterized in that: The drive shaft of the drive motor (200) is provided with two one-way clutches (110) at both ends. The two one-way clutches (110) are respectively connected to a main rotating rod (108) and a tail rotating rod (109) that are coaxially arranged with the drive shaft of the drive motor (200). The first centrifugal impeller (300) is fixedly installed on the main rotating rod (108), and the second centrifugal impeller (400) is fixedly installed on the tail rotating rod (109).

8. The single-motor, dual-impeller high-efficiency fan system according to claim 1, characterized in that: A wind speed sensor (111) is installed inside the housing (100) between the first centrifugal impeller (300) and the second centrifugal impeller (400). The wind speed sensor (111) is electrically connected to a controller, which is electrically connected to the drive motor (200).

9. A single-motor, dual-impeller high-efficiency fan system according to claim 1, characterized in that: The two ends of the housing (100) are respectively provided with a first mounting part (112) corresponding to the air inlet hood (102) and the air outlet hood (103). The air inlet hood (102) and the air outlet hood (103) are respectively provided with a second mounting part (113) corresponding to the first mounting part (112). The first mounting part (112) and the second mounting part (113) are connected by bolts.

10. A single-motor, dual-impeller high-efficiency fan system according to any one of claims 1-9, characterized in that: Two air guide plates (104) are fixedly installed with a first sealing ring (114) corresponding to the housing (100). The two first sealing rings (114) abut against the two air guide plates (104) and the housing (100) respectively. A second sealing ring (115) is installed on the air guide plate (104) corresponding to the air inlet cover (102). The second sealing ring (115) abuts against the air guide plate (104) and the air inlet cover (102). A third sealing ring (116) is installed on the air guide plate (104) corresponding to the air outlet cover (103). The third sealing ring (116) abuts against the air guide plate (104) and the air outlet cover (103).

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