Single-stage booster fan, multi-stage booster fan and multi-channel booster fan
By introducing a rotor and stator section into the fan, mechanical energy is converted into fluid kinetic energy and static pressure energy, solving the problems of large space occupation and poor ventilation effect of existing fans, and achieving a more efficient and compact in-vehicle ventilation effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-01
- Publication Date
- 2026-04-14
AI Technical Summary
Existing automotive turbocharger fans are large in size, occupy interior space, have limited placement options, and have poor ventilation performance.
It adopts a single-stage booster fan and a multi-stage booster fan structure, including a rotor section and a stator section. The rotor section converts mechanical energy into fluid kinetic energy, and the stator section converts kinetic energy into static pressure energy. By adding a stator section after the rotor section, the energy conversion efficiency and flow field uniformity are improved.
It improves in-vehicle ventilation within a limited space, increases the pressure ratio and overall efficiency, has a compact structure, is lightweight, has low input power, reduces noise, and provides more uniform ventilation.
Smart Images
Figure CN121854438A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of automotive ventilation equipment technology, and in particular to a single-stage booster fan, a multi-stage booster fan, and a multi-channel booster fan. Background Technology
[0002] As living standards improve, cars have gradually become a common mode of transportation, and people have increasingly higher demands for car comfort. More and more manufacturers are using turbochargers in vehicles to improve ventilation. However, most existing automotive turbochargers are centrifugal fans, which are large in size, significantly occupying interior space and severely limiting their placement. Summary of the Invention
[0003] The purpose of this invention is to provide a single-stage booster fan, a multi-stage booster fan, and a multi-channel booster fan to solve the problems existing in the prior art and improve the booster ventilation effect in a vehicle within a limited space.
[0004] To achieve the above objectives, the present invention provides the following solution: The present invention provides a single-stage booster fan, comprising: The fan housing has a closed shell structure, with an air inlet at one end and an air outlet at the other end. The rotor is rotatably mounted in the fan housing. The rotor has a plurality of first axial flow fan blades arranged radially. Each first axial flow fan blade rotates synchronously with the rotor and surrounds the outer periphery of the rotor's rotation axis. The rotor is equipped with a drive mechanism that drives its rotation. The stator is fixedly installed in the fan housing and coaxially arranged on the air outlet side of the rotor. The stator is provided with a plurality of second axial flow fan blades arranged radially. Each second axial flow fan blade surrounds the outer periphery of the axis of the stator, and the spiral direction of each second axial flow fan blade is opposite to the rotation direction of the first axial flow fan blade.
[0005] Optionally, the fan housing has a cylindrical structure, and both the rotor and the stator are coaxially arranged with the fan housing.
[0006] Optionally, the outer contour structure of both the rotor section and the stator section is matched with the internal cross-sectional structure of the fan housing.
[0007] Optionally, the rotor section includes: The rotation center is rotatably mounted in the fan housing; A plurality of first axial flow fan blades, each first axial flow fan blade surrounding the outer periphery of the rotation center.
[0008] Optionally, the rotor section further includes: A reinforcing ring is coaxially wrapped around the outer periphery of the rotation center. Each of the first axial flow fan blades is disposed between the reinforcing ring and the rotation center, and the two ends of the first axial flow fan blades are respectively connected to the rotation center and the reinforcing ring.
[0009] Optionally, the stator section includes: A fixed center is located within the fan housing; Multiple second axial flow fan blades are provided, each second axial flow fan blade is disposed between the fixed center and the fan housing, and the two ends of the second axial flow fan blades are respectively connected to the fixed center and the fan housing.
[0010] Optionally, the fixed center includes: The outer ring, the ends of each of the second axial flow fan blades that are away from the fan housing are all connected to the outer wall of the outer ring; The inner ring is coaxially disposed on the inner circumference side of the outer ring; Multiple reinforcing ribs are provided, each of which is disposed between the inner ring and the outer ring, and both ends of the reinforcing rib are connected to the inner ring and the outer ring respectively.
[0011] Optionally, the number of the first axial flow fan blades and the number of the second axial flow fan blades are coprime.
[0012] A multi-stage booster fan is also provided, comprising at least two sets of single-stage booster fans; the air outlet of the first-stage single-stage booster fan is connected to the air inlet of the second-stage single-stage booster fan; the spiral direction of the second axial flow fan blade of the first-stage single-stage booster fan is the same as the rotation direction of the first axial flow fan blade of the second-stage single-stage booster fan.
[0013] A multi-channel booster fan is also provided, including an upper fixed part, a lower fixed part, and at least two sets of multi-stage booster fans; the upper fixed part and the lower fixed part are connected, and each set of multi-stage booster fans is arranged side by side between the upper fixed part and the lower fixed part.
[0014] The present invention achieves the following technical effects compared to the prior art: In this invention, both the rotor and stator are installed within the fan housing, positioned between the air inlet and outlet, with the stator located on the outlet side of the rotor. The rotor's rotation converts mechanical energy into the fluid's kinetic energy, while the stator converts the fluid's kinetic energy into static pressure energy. This achieves: First, energy conversion: the stator reduces the fluid's velocity, effectively converting most of the kinetic energy lost due to the velocity reduction into static pressure energy. Second, elimination of swirling flow and guidance of airflow direction, resulting in a more uniform flow field. When the airflow leaves the rotor, it possesses both axial and circumferential velocity components, i.e., swirling flow. The stator changes the airflow direction, absorbing the circumferential velocity airflow and transforming the rotating, spiraling airflow into an almost entirely axial flow. Eliminating swirling flow ensures that the airflow exits at the correct angle and with a more uniform flow field. Third, it improves the boost ratio and overall efficiency. Adding a stator section after the rotor section can more effectively convert kinetic energy into pressure energy and reduce flow losses, thus significantly improving the efficiency of the entire booster fan. Under the premise of meeting the same boost requirements, a booster fan with a stator section after the rotor section is more compact, lighter, requires less input power, and is more economical than a booster fan that only uses the rotor section for boosting. Attached Figure Description
[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0016] Figure 1 This is an exploded view of the overall structure of a single-stage booster fan in an example disclosed in this invention; Figure 2 This is an exploded view of the overall structure of a multi-stage booster fan in an example disclosed in this invention; Figure 3 This is a front view of the overall structure of the rotor section in an example disclosed in this invention; Figure 4 This is an isometric view of the overall rotor structure in an example disclosed in this invention; Figure 5 This is a front view of the overall structure of the stator combined with the fan housing in an example disclosed in this invention; Figure 6 This is an isometric view of the overall structure of the stator combined with the fan housing in an example disclosed in this invention; Figure 7 This is a schematic diagram of the overall structure of a multi-channel booster fan in an example disclosed in this invention; Figure 8 This is an exploded view of the overall structure of a multi-channel booster fan in an example disclosed in this invention; Among them, 1-reinforcing ring, 2-fan housing, 3-first axial flow fan blade, 4-rotation center, 5-second axial flow fan blade, 6-fixed center, 7-rotor part, 8-stator part, 9-previous stage single-stage booster fan, 10-rear stage single-stage booster fan, 11-inner ring, 12-outer ring, 13-reinforcing rib, 14-upper fixed part, 15-lower fixed part, 16-multi-stage booster fan. Detailed Implementation
[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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 skilled in the art without creative effort are within the scope of protection of the present invention.
[0018] The purpose of this invention is to provide a single-stage booster fan, a multi-stage booster fan, and a multi-channel booster fan to solve the problems existing in the prior art and improve the booster ventilation effect in a vehicle within a limited space.
[0019] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0020] like Figures 1 to 8 As shown, the present invention provides a single-stage booster fan, particularly for use in automobiles, to improve in-vehicle ventilation. It includes a fan housing 2, a rotor 7, and a stator 8. The fan housing 2 is a closed shell structure with an air inlet at one end and an air outlet at the other. The rotor 7 is rotatably mounted in the fan housing 2 and has multiple radially arranged first axial flow fan blades 3, each rotating synchronously with the rotor 7 and surrounding the outer periphery of the rotor 7's rotation axis. The rotor 7 is equipped with a drive mechanism to drive its rotation. The stator 8 is fixedly mounted in the fan housing 2 and coaxially positioned on the air outlet side of the rotor 7. The stator 8 has multiple radially arranged second axial flow fan blades 5, each surrounding the outer periphery of the stator 8's axis, and the spiral direction of each second axial flow fan blade 5 is opposite to the rotation direction of the first axial flow fan blades 3.
[0021] In this embodiment, the fan housing 2, rotor 7, and stator 8 all conform to aerodynamic design.
[0022] In this embodiment, the stator 8 is integrally formed with the fan housing 2.
[0023] In this embodiment, the drive mechanism is a drive motor, which is fixedly mounted on the fan housing 2.
[0024] In this invention, both the rotor 7 and the stator 8 are installed in the fan housing 2, located between the air inlet and the air outlet, with the stator 8 positioned on the air outlet side of the rotor 7. The rotation of the rotor 7 converts mechanical energy into the kinetic energy of the fluid, while the stator 8 converts the kinetic energy of the fluid into static pressure energy. This achieves the following: First, energy conversion: the stator 8 reduces the fluid velocity, and most of the kinetic energy lost due to the reduced fluid velocity is effectively converted into static pressure energy. Second, elimination of swirling flow and guidance of airflow direction, resulting in a more uniform flow field. When the airflow leaves the rotor 7, it has both an axial velocity component and a circumferential velocity component, i.e., swirling flow. The stator 8 can change the airflow direction, absorbing the circumferential velocity airflow and transforming the rotating, spiraling airflow into an almost entirely axial flow. Eliminating swirling flow ensures that the airflow exits at the correct angle and with a more uniform flow field. Third, it improves the boost ratio and overall efficiency. Adding a stator section 8 after the rotor section 7 can more effectively convert kinetic energy into pressure energy and reduce flow losses, thus significantly improving the efficiency of the entire booster fan. Under the premise of meeting the same boost requirements, the booster fan with a stator section 8 after the rotor section 7 is more compact, lighter, requires less input power, and is more economical than the booster fan that only uses the rotor section 7 for boosting.
[0025] In one specific embodiment, the fan housing 2 has a cylindrical structure, and the rotor portion 7 and the stator portion 8 are both coaxially arranged with the fan housing 2; and preferably, the outer contour structure of the rotor portion 7 and the stator portion 8 are matched with the internal cross-sectional structure of the fan housing 2; so that the boosting effect can be further improved by the constraint of the fan housing 2 and the cooperation of the rotor portion 7 and the stator portion 8.
[0026] In one specific embodiment, the rotor section 7 includes a rotation center 4 and a plurality of first axial flow fan blades 3; the rotation center 4 is rotatably mounted in the fan housing 2; each first axial flow fan blade 3 surrounds the outer periphery of the rotation center 4; and preferably, the rotor section 7 also includes a reinforcing ring 1, which is coaxially surrounded on the outer periphery of the rotation center 4, and each first axial flow fan blade 3 is disposed between the reinforcing ring 1 and the rotation center 4, and the two ends of the first axial flow fan blade 3 are respectively connected to the rotation center 4 and the reinforcing ring 1 to improve the structural strength of each first axial flow fan blade 3 on the rotor section 7.
[0027] In one specific embodiment, the stator 8 has a fixed center 6 and a plurality of second axial flow fan blades 5; the fixed center 6 is located in the fan housing 2; each second axial flow fan blade 5 is disposed between the fixed center 6 and the fan housing 2, and the two ends of the second axial flow fan blade 5 are respectively connected to the fixed center 6 and the fan housing 2, so as to improve the structural strength of each second axial flow fan blade 5 on the stator 8.
[0028] In one specific embodiment, the fixing center 6 includes an outer ring 12, an inner ring 11, and multiple reinforcing ribs 13; the ends of each second axial fan blade 5 facing away from the fan housing 2 are all connected to the outer wall of the outer ring 12; the inner ring 11 is coaxially disposed on the inner circumference of the outer ring 12; each reinforcing rib 13 is disposed between the inner ring 11 and the outer ring 12 and is radially distributed, with both ends of the reinforcing rib 13 connected to the inner ring 11 and the outer ring 12 respectively. This allows the fixing center 6 to act as a structural anchor point during the integral injection molding of the stator 8 and the fan housing 2, balancing shrinkage forces and reducing the risk of deformation of the second axial fan blade 5. Furthermore, during injection molding, the fixing center 6 can serve as a flow path for the molten plastic, helping the material to fill the ends of the second axial fan blade 5 more evenly and avoiding material shortages or shrinkage cavities caused by insufficient flow.
[0029] In one specific embodiment, the number of the first axial flow fan blade 3 and the second axial flow fan blade 5 are coprime, so as to avoid resonance during ventilation and extend their service life.
[0030] Furthermore, a multi-stage booster fan is also provided, particularly for automotive applications, to improve in-vehicle ventilation. It comprises at least two sets of single-stage booster fans; the outlet of the preceding single-stage booster fan 9 is connected to the inlet of the following single-stage booster fan 10; the spiral direction of the second axial flow blade 5 of the preceding single-stage booster fan 9 is the same as the rotation direction of the first axial flow blade 3 of the following single-stage booster fan 10. This invention achieves boosting by employing at least two sets of single-stage booster fans in a step-by-step manner, meeting boosting requirements while also possessing the advantage of large airflow from axial flow fans. Specifically, the preceding single-stage booster fan 9 eliminates swirling airflow, ensuring that airflow enters the following single-stage booster fan 10 at the correct angle and with a more uniform flow field, improving the efficiency and operational stability of the following single-stage booster fan 10. Simultaneously, a more uniform flow field reduces aerodynamic turbulence, lowering blade noise and the risk of blade vibration.
[0031] In this embodiment, the fan housing 2 of the single-stage booster fan has a cylindrical structure, and the fan housings 2 of the two sets of single-stage booster fans are coaxially connected to connect the corresponding air outlet and air inlet.
[0032] In this embodiment, it is preferable to use two sets of single-stage booster fans to achieve boosting in stages.
[0033] In this embodiment, the rotor section 7 of each group of single-stage booster fans is driven by a corresponding and independent drive mechanism, thereby enabling the rotor section 7 of each group of single-stage booster fans to rotate at different speeds.
[0034] In this embodiment, the number of the first axial flow fan blades 3 and the second axial flow fan blades 5 in each group of single-stage booster fans are coprime, so as to avoid resonance during ventilation and extend their service life.
[0035] Furthermore, a multi-channel booster fan is also provided, especially for use in automobiles, to improve the ventilation effect inside the vehicle; it includes an upper fixed part 14, a lower fixed part 15, and at least two sets of multi-stage booster fans 16; the upper fixed part 14 and the lower fixed part 15 are connected, and each set of multi-stage booster fans 16 is arranged side by side between the upper fixed part 14 and the lower fixed part 15; so as to increase the ventilation volume inside the vehicle.
[0036] In this embodiment, the upper fixing part 14 and the lower fixing part 15 are connected to each group of multi-stage booster fans 16 through shock-absorbing rubber and sound-absorbing sponge to achieve the purpose of shock absorption and noise reduction.
[0037] Any adaptive changes made according to actual needs are within the scope of protection of this invention.
[0038] It should be noted that, for those skilled in the art, it is obvious 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 illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
[0039] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.
Claims
1. A single-stage booster fan, characterized in that, include: The fan housing has a closed shell structure, with an air inlet at one end and an air outlet at the other end. The rotor is rotatably mounted in the fan housing. The rotor has a plurality of first axial flow fan blades arranged radially. Each first axial flow fan blade rotates synchronously with the rotor and surrounds the outer periphery of the rotor's rotation axis. The rotor is equipped with a drive mechanism that drives its rotation. The stator is fixedly installed in the fan housing and coaxially arranged on the air outlet side of the rotor. The stator is provided with a plurality of second axial flow fan blades arranged radially. Each second axial flow fan blade surrounds the outer periphery of the axis of the stator, and the spiral direction of each second axial flow fan blade is opposite to the rotation direction of the first axial flow fan blade.
2. The single-stage booster fan according to claim 1, characterized in that, The fan housing has a cylindrical structure, and the rotor and stator are both coaxially arranged with the fan housing.
3. The single-stage booster fan according to claim 2, characterized in that, The outer contour structure of both the rotor section and the stator section matches the internal cross-sectional structure of the fan housing.
4. The single-stage booster fan according to claim 1, characterized in that, The rotor section includes: The rotation center is rotatably mounted in the fan housing; A plurality of first axial flow fan blades, each first axial flow fan blade surrounding the outer periphery of the rotation center.
5. The single-stage booster fan according to claim 4, characterized in that, The rotor section also includes: A reinforcing ring is coaxially wrapped around the outer periphery of the rotation center. Each of the first axial flow fan blades is disposed between the reinforcing ring and the rotation center, and the two ends of the first axial flow fan blades are respectively connected to the rotation center and the reinforcing ring.
6. The single-stage booster fan according to claim 1, characterized in that, The stator part includes: A fixed center is located within the fan housing; Multiple second axial flow fan blades are provided, each second axial flow fan blade is disposed between the fixed center and the fan housing, and the two ends of the second axial flow fan blades are respectively connected to the fixed center and the fan housing.
7. The single-stage booster fan according to claim 6, characterized in that, The fixed center includes: The outer ring, the ends of each of the second axial flow fan blades that are away from the fan housing are all connected to the outer wall of the outer ring; The inner ring is coaxially disposed on the inner circumference side of the outer ring; Multiple reinforcing ribs are provided, each of which is disposed between the inner ring and the outer ring, and both ends of the reinforcing rib are connected to the inner ring and the outer ring respectively.
8. The single-stage booster fan according to claim 1, characterized in that, The number of the first axial flow fan blades and the number of the second axial flow fan blades are coprime.
9. A multi-stage booster fan, characterized in that, It includes at least two sets of single-stage booster fans as described in any one of claims 1 to 8; the air outlet of the first-stage single-stage booster fan is connected to the air inlet of the second-stage single-stage booster fan; the spiral direction of the second axial flow fan blade of the first-stage single-stage booster fan is the same as the rotation direction of the first axial flow fan blade of the second-stage single-stage booster fan.
10. A multi-channel booster fan, characterized in that, It includes an upper fixed part, a lower fixed part, and at least two sets of multi-stage booster fans as described in claim 9; the upper fixed part and the lower fixed part are connected, and each set of multi-stage booster fans is arranged side by side between the upper fixed part and the lower fixed part.