Composite fan
By designing a composite fan, using a structure of lateral air inlet and axial air outlet, the problem of difficulty in installing traditional axial flow fans in space-constrained environments is solved, and efficient air flow guidance and space utilization are achieved.
Patent Information
- Application Number
- CN202421152578.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-24
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2034-05-24
AI Technical Summary
Traditional axial flow fans need to reserve space in front and rear for inlet and outlet air, making it difficult to install in space-constrained environments.
A composite fan is designed, adopting a structure of lateral air inlet and axial air outlet. Through the design of the outer frame and hub body, the lateral suction and axial output of the air flow are realized.
The flexibility of installing fans in space-constrained environments is achieved, maintaining high air volume of axial fans while reducing space requirements.
Smart Images
Figure CN222526541U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a composite fan, in particular to a composite fan with lateral air inlet and axial air outlet. Background Art
[0002] See also Figure 1 and Figure 2 , a conventional axial flow fan is generally arranged in a frame (not shown), and includes a hub body 11 pivotally arranged in the frame, and a plurality of blades 12 extending outward from the periphery of the hub body 11. Each blade 12 has a first inner end point 121 connected to the hub body 11, a first outer end point 122 located outside the first inner end point 121 and higher than the first inner end point 121, a second inner end point 123 located axially below the first inner end point 121 and connected to the hub body 11, and a second outer end point 124 located outside the second inner end point 123. The connecting lines between the first inner end point 121, the first outer end point 122, the second inner end point 123, and the second outer end point 124 cooperate to define the outline of the blade 12, and this outline design is conducive to guiding the axial airflow.
[0003] When the axial flow fan is in operation, the hub body 11 is axially rotated from the rear (eg Figure 2 As shown by arrow a, that is, the side adjacent to the first inner end point 121 and the first outer end point 122) inhales air and moves forward along the axial direction of the hub body 11 (such as Figure 2 Although the axial flow fan has a larger air output volume than the centrifugal fan and is generally used in mechanical equipment or larger electronic products, it needs to reserve space in front and behind the hub body 11 in the axial direction. Therefore, when the frame is installed on the housing of the device to be cooled, the housing needs to have holes and be connected to the outside or cavity to ensure smooth air inlet and outlet. This makes it difficult to install the axial flow fan in a relatively limited space such as a car seat. Utility Model Content
[0004] The utility model aims to provide a composite fan capable of lateral air intake and axial air discharge.
[0005] The composite fan of the utility model is suitable for taking in wind along the radial direction and discharging wind along the axial direction perpendicular to the radial direction. The composite fan comprises an outer frame, a hub body pivotally arranged on the outer frame, and a plurality of fan blades extending outward from the hub body. The outer frame comprises a main frame body surrounding an inner space, and an outer cover covered on the main frame body along the axial direction. The main frame body defines an air outlet opened along the axial direction and connected to the inner space, and a plurality of air inlets opened along the radial direction and connected to the air outlet and the inner space. The hub body is located in the inner space, and the rotation axis of the hub body is parallel to the axial direction. Each fan The blade includes a first inner end point connected to the hub body, a second inner end point connected to the hub body and spaced apart from the first inner end point along the axial direction, a first outer end point located outside the first inner end point along the radial direction and between the first inner end point and the second inner end point along the axial direction, and a second outer end point located outside the second inner end point. The first inner end point, the second inner end point, the first outer end point, and the second outer end point define the outline of the fan blade. The first inner end point is farther away from the air outlet along the axial direction than the second inner end point, and the first outer end point is farther away from the air outlet along the axial direction than the second outer end point.
[0006] In the composite fan of the utility model, the shortest distance from the top surface of the hub body to the first inner end point along the axial direction is smaller than the shortest distance from the top surface of the hub body to the first outer end point along the axial direction.
[0007] The composite fan described in the utility model comprises a main frame body of the outer frame comprising an annular frame portion defining an opening opened along the axial direction, a plurality of side column portions each extending from the annular frame portion along the axial direction and arranged in an annular shape at intervals from each other, and a connecting frame portion connecting the side column portions, wherein the connecting frame portion defines the air outlet, the opening is spaced from the air outlet along the axial direction and connected to the internal space, and the outer cover is fixed on the annular frame portion and blocks the opening.
[0008] In the composite fan of the utility model, each air inlet of the outer frame is defined by the cooperation of the ring frame portion, two adjacent side column portions, and the connecting frame portion.
[0009] The composite fan described in the utility model, the main frame body of the outer frame also has a seat frame portion connected to the connecting frame portion and located in the air outlet, the seat frame portion divides the air outlet into a plurality of air outlet slots connected to the internal space, and the hub body is pivotally disposed on the seat frame portion.
[0010] The beneficial effect of the present invention is that when the hub body rotates, due to the design that the first outer end point is located between the first inner end point and the second inner end point along the axial direction, the performance of the fan blade inletting air from the radial direction can be improved. In addition, through the shielding of the outer cover in the axial direction and the air inlet opened along the radial direction, the present invention can inhale air laterally (i.e. radially) and exhaust air from the axial direction, thereby maintaining the advantage of the axial flow fan with a larger air volume. At the same time, because of the lateral air inlet, the outer cover can be fixed on the shell of the device to be cooled, and the shell does not need to have holes, thereby achieving flexibility in spatial setting. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 is a perspective view illustrating a conventional axial flow fan;
[0012] Figure 2 It is a side view, indicating Figure 1 The contour design of multiple blades of the axial flow fan described in the invention;
[0013] Figure 3 is a three-dimensional exploded view illustrating an embodiment of the composite fan of the utility model;
[0014] Figure 4 is a bottom view of the embodiment;
[0015] Figure 5 is a side view of the embodiment;
[0016] Figure 6 is a three-dimensional diagram illustrating a hub body and a plurality of blades of the embodiment;
[0017] Figure 7 It is a side view illustrating the structure of the fan blades in the embodiment. DETAILED DESCRIPTION
[0018] The utility model is described in detail below with reference to the accompanying drawings and embodiments.
[0019] See also Figure 3 , Figure 4 ,and Figure 5 The embodiment of the composite fan of the utility model comprises an outer frame 2, a hub body 3 pivotally mounted in the outer frame 2 and rotatable relative to the outer frame 2, and a plurality of fan blades 4 arranged on the outer circumference of the hub body 3 and arranged in an annular manner at equal angles to each other.
[0020] The outer frame 2 includes a main frame 21 and an outer cover 22 axially covered on the main frame 21. The main frame 21 defines an internal space 211 and has an annular frame portion 212, four side column portions 213 extending from the annular frame portion 212 along the axial direction and arranged in an annular manner, a connecting frame portion 214 connecting the side column portions 213, and a seat frame portion 215 connecting the connecting frame portion 214. The central axis of the annular frame portion 212 is parallel to the axial direction, and the annular frame portion 212 defines an opening 216 opened along the axial direction and connected to the internal space 211. The central axis of the connecting frame portion 214 is parallel to the axial direction. The connecting frame portion 214 is annular and defines an air outlet 217 opened along the axial direction and connected to the internal space 211. Any two adjacent side column parts 213, the ring frame part 212, and the connecting frame part 214 cooperate to define an air inlet 218 opened in a radial direction perpendicular to the axial direction. The air inlet 218 communicates with the internal space 211 and the air outlet 217. The seat frame part 215 is located in the air outlet 217. The seat frame part 215 has a disc-shaped central part and five parts extending outward from the periphery of the central part. These five curved extension parts cooperate with the central part to divide the air outlet 217 into five air outlet slots 219 connected to the internal space 211, that is, an air outlet slot 219 is provided between two adjacent curved extension parts. The shape of the seat frame part 215 and the air outlet slot 219 can be designed according to the actual air outlet requirements. The outer cover 22 can be fixed to the ring frame part 212 by screw locks, tenons, or bonding. The outer cover 22 blocks the outer side of the opening 216 along the axial direction to close the opening 216 .
[0021] See also Figure 4 , Figure 6 ,and Figure 7 The hub body 3 is pivotally disposed on the seat frame portion 215 and is located in the internal space 211 (see Figure 3). The axis of rotation of the hub body 3 is parallel to the axial direction. The blades 4 extend outward from the hub body 3 along the radial direction. Each blade 4 includes a first inner endpoint 41 connected to the hub body 3, a second inner endpoint 42 connected to the hub body 3 and spaced apart from the first inner endpoint 41 along the axial direction, a first outer endpoint 43 which is farther from the hub body 3 than the first inner endpoint 41 and is located between the first inner endpoint 41 and the second inner endpoint 42 along the axial direction, and a second outer endpoint 44 which is farther from the hub body 3 than the second inner endpoint 42. The line connecting the first inner endpoint 41, the second inner endpoint 42, the first outer endpoint 43, and the second outer endpoint 44 outlines the outline of the blade 4. The first inner endpoint 41 is farther from the air outlet 217 along the axial direction than the second inner endpoint 42. The first outer endpoint 43 is farther from the air outlet 217 along the axial direction than the second outer endpoint 44. The shortest distance A from the top surface of the hub body 3 to the first inner end point 41 along the axial direction is smaller than the shortest distance B from the top surface of the hub body 3 to the first outer end point 43 along the axial direction, so that the position of the first outer end point 43 is indeed located between the first inner end point 41 and the second inner end point 42 along the axial direction, thereby ensuring the improvement of the radial air intake performance of the fan blade 4.
[0022] See also Figure 3 , Figure 4 ,and Figure 7 Since the first outer end point 43 is located between the first inner end point 41 and the second inner end point 42 along the axial direction, that is, the position of the first outer end point 43 is lower than the position of the first inner end point 41, when the hub body 3 drives the fan blade 4 to rotate, the lateral airflow is more easily brought in radially by the fan blade 4 from the first outer end point 43 at a lower position, thereby achieving the effect of improving the radial air intake performance of the fan blade 4. In addition, the outer cover 22 blocks the opening 216 along the axial direction, so the airflow is sucked into the internal space 211 along the radial direction from the air inlet 218 (such as Figure 7 The fan blades 4 pressurize the airflow to turn the airflow through the air outlet slots 219 and output the airflow axially along the air outlet 217 (as shown by the arrow L1 in the middle). Figure 7 The design of the axial air outlet can ensure that the fan blades 4 can output a sufficient amount of air, and the design of the radial air inlet can reduce the required reserved space. In actual installation, the outer cover 22 can be fixed to the housing of the device to be cooled with its outward side. The housing does not need to be drilled or have too much air inlet space reserved. As long as there is space around the outer frame 2, the utility model is very flexible in installation and can be installed on devices with more space restrictions.
[0023] In summary, when the air outlet 217 is facing downward, since the position of the first outer end point 43 of each fan blade 4 is lower than the first inner end point 41, this design allows the fan blade 4 to effectively increase the performance of radial air intake. At the same time, through the shielding of the outer cover 22 in the axial direction and the air inlet 218 opened along the radial direction, the utility model can inhale air laterally (i.e., radially) and exhaust air in the axial direction, thereby maintaining the advantage of a larger air volume of the axial flow fan. At the same time, because of the lateral air intake, the outer cover 22 can be fixed on the shell of the device to be cooled, and the shell does not need to have holes, thereby achieving flexibility in spatial setting, so that the purpose of the utility model can be achieved.
Claims
1. A composite fan, suitable for taking in air in a radial direction and discharging air in an axial direction perpendicular to the radial direction, characterized in that: The composite fan comprises an outer frame, a hub body pivotally arranged on the outer frame, and a plurality of blades extending outward from the hub body, wherein the outer frame comprises a main frame body surrounding an inner space, and an outer cover covered on the main frame body along the axial direction, the main frame body defines an air outlet opened along the axial direction and connected to the inner space, and a plurality of air inlets opened along the radial direction and connected to the air outlet and the inner space, the hub body is located in the inner space, and the rotation axis of the hub body is parallel to the axial direction, and each blade comprises a first inner end point connected to the hub body, A second inner endpoint connected to the hub body and spaced apart from the first inner endpoint along the axial direction, a first outer endpoint located outside the first inner endpoint along the radial direction and between the first inner endpoint and the second inner endpoint along the axial direction, and a second outer endpoint located outside the second inner endpoint, the first inner endpoint, the second inner endpoint, the first outer endpoint, and the second outer endpoint define the outline of the fan blade, the first inner endpoint is farther away from the air outlet along the axial direction than the second inner endpoint, and the first outer endpoint is farther away from the air outlet along the axial direction than the second outer endpoint.
2. The composite fan according to claim 1, characterized in that: The shortest distance from the top surface of the hub body to the first inner end point along the axial direction is smaller than the shortest distance from the top surface of the hub body to the first outer end point along the axial direction.
3. The composite fan according to claim 1, characterized in that: The main frame body of the outer frame has an annular frame portion that defines an opening opened along the axial direction, a plurality of side column portions that extend from the annular frame portion along the axial direction and are arranged in an annular shape and spaced apart from each other, and a connecting frame portion that connects the side column portions, the connecting frame portion defines the air outlet, the opening is spaced apart from the air outlet along the axial direction and connected to the internal space, and the outer cover is fixed on the annular frame portion and blocks the opening.
4. The composite fan according to claim 3, characterized in that: Each air inlet of the outer frame is defined by the ring frame portion, two adjacent side column portions, and the connecting frame portion.
5. The composite fan according to claim 4, characterized in that: The main frame body of the outer frame also has a seat frame part connected to the connecting frame part and located in the air outlet, the seat frame part divides the air outlet into a plurality of air outlet slots connected to the internal space, and the hub body is pivotably arranged on the seat frame part.