Low-noise high-pressure dual-function axial flow fan module

Abstract

The utility model relates to the technical field of fans, and discloses a low-noise high-pressure dual-function axial flow fan module which comprises a first shell, a second shell, a motor and fan blades. The first shell comprises a motor mounting seat, a first pressurizing sheet and a first outer ring; the inner wall of the first outer ring, the first pressurizing sheet and the motor mounting seat form a first speed-increasing air duct; the motor is arranged on the motor mounting seat; the fan blades are arranged at the output end of the motor and comprise hubs and blades, and the proportion of the distance between the upper portions of blade tails and the distance between the lower portions of the blade tails is 0.8-1.2. The outer edge is twisted relative to the inner edge to form a bent windward side and a leeward side; the second shell comprises a second outer ring, a pressurizing seat and a second pressurizing sheet; the second outer ring, the second pressurizing sheet and the pressurizing seat form a second accelerating air duct; and after airflow passes through the first speed-increasing air duct and the second speed-increasing air duct to be accelerated, the air volume and the air supply distance are increased.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, and particularly relates to a low-noise high-pressure dual-function axial flow fan module. Background Art

[0002] Among the existing fans on the market, for axial flow fans, the working principle of axial flow fans is to suck air from one end and blow it out from the other end in a direction parallel to the axis, resulting in the blown air having the disadvantages of low air pressure and short air supply distance; at the same time, due to the defective structural design of the fan blades, there is a problem of relatively high noise when the fan blades rotate.

[0003] Therefore, improvements need to be made. Summary of the Utility Model

[0004] The technical problem solved by the utility model is to provide a low-noise high-pressure dual-function axial flow fan module to solve the problems raised in the above background art in view of the defects existing in the above-mentioned prior art.

[0005] To solve the above technical problems, the technical solution adopted by the present utility model is as follows: A low-noise high-pressure dual-functional axial flow fan module, comprising: a first housing, a second housing, a motor, and a fan blade; the first housing, the first housing is located at the air inlet end; the first housing includes a motor mounting seat, more than one first pressurizing piece, and a first outer ring; the first pressurizing pieces are distributed on the inner wall of the first outer ring and extend to connect the outer periphery of the motor mounting seat; the inner wall of the first outer ring, the first pressurizing pieces and the motor mounting seat form a first speed-increasing air duct, and the first speed-increasing air duct increases the radial ventilation area through the first pressurizing pieces, resulting in a decrease in the radial ventilation area to pressurize and increase the speed of the air flow; the motor, the motor is arranged on the motor mounting seat; the fan blade, the fan blade is arranged on the output end of the motor, the fan blade includes a hub and blades evenly distributed along the outer peripheral surface of the hub, and the blades include a leading edge, an outer edge, a trailing edge, and an inner edge; wherein, the inner edge is spirally arranged on the outer peripheral surface of the hub, the outer edge is arranged opposite to the inner edge, the leading edge connects the inner edge and the outer edge, and the trailing edge is arranged opposite to the leading edge; the connection position of the leading edge and the inner edge is the upper part of the blade tail, and the connection position of the trailing edge and the inner edge is the lower part of the blade tail, and the ratio of the distance between the upper parts of the blade tails of adjacent blades to the distance between the lower parts of the blade tails of adjacent blades is 0.8 to 1.2; the outer edge is twisted relative to the inner edge to form a curved windward surface and a leeward surface opposite to the windward surface, the windward surface is an inwardly concave arc structure, and the leeward surface is an outwardly convex arc structure; the second housing, the second housing is located at the air outlet end and is connected to the first housing; the second housing includes a second outer ring, a pressurizing seat, and more than one second pressurizing piece; the second pressurizing pieces are distributed on the inner wall of the second outer ring and extend to connect to the outer periphery of the pressurizing seat; the inner wall of the second outer ring, the second pressurizing pieces and the pressurizing seat form a second speed-increasing air duct, and the second speed-increasing air duct increases the radial ventilation area through the second pressurizing pieces, resulting in a decrease in the radial ventilation area to pressurize and increase the speed of the air flow; wherein, the motor drives the fan blade to rotate to generate a negative pressure at the air inlet end to direct the air flow to the first speed-increasing air duct, the air flow is pressurized by the first pressurizing pieces in the first outer ring and directed to the second speed-increasing air duct, and the air flow is pressurized by the second pressurizing pieces in the second speed-increasing air duct and blown out; so that the air flow increases the air volume and the air supply distance after passing through the first speed-increasing air duct and the second speed-increasing air duct.

[0006] Further, the ratio of the length of the inner edge to the length of the outer edge is 0.4 to 0.9.

[0007] Further, the ratio of the length of the leading edge to the length of the trailing edge is 0.7 to 1.3.

[0008] Further, the outer edge rotates around the center line of the hub to form an equal-diameter contour from the air inlet direction to the air outlet direction.

[0009] Further, the connection position between the leading edge and the outer edge is the upper part of the blade tip; the leading edge extends radially from the hub and presents an arc shape; wherein, the extension lines of the upper part of the trailing edge of adjacent blades, the leading edge of adjacent blades, and the upper part of the blade tip of adjacent blades form an air inlet area for air flow to enter.

[0010] Further, the connection position between the trailing edge and the outer edge is the lower part of the blade tip, and the trailing edge extends radially from the hub and presents an arc shape; wherein, the extension lines of the lower part of the trailing edge of adjacent blades, the trailing edge of adjacent blades, and the lower part of the blade tip of adjacent blades form an air outlet area for air flow to blow out.

[0011] Further, the hub has a receiving portion that is recessed inward.

[0012] Further, a rotating shaft is provided at the center line position of the hub in the receiving portion.

[0013] Further, a magnetic ring is provided on the inner side wall of the receiving portion.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] 1. In the design of the fan module, a double-speed air duct form is adopted. When the air flow passes through the first speed-up air duct, the first pressure-increasing piece provided in the first speed-up air duct causes the radial ventilation area to become smaller, thereby realizing the pressurization of the air flow. At the same time, the first speed-up air duct is located at the air inlet end, whereby the surrounding air can be sucked in and the air volume can be increased; when the air flow passes through the second speed-up air duct, under the action of the second pressure-increasing piece in the second speed-up air duct, the air flow is further pressurized in the second stage, thereby realizing the increase of the air volume and the air supply distance of the air flow.

[0016] 2. In the structure of the fan blade, a windward surface and a leeward surface are provided. When the fan blade rotates, the air flow can be cut and guided, thereby reducing the wind noise; at the same time, the structural dimensions of the fan blade are further restricted to increase the air volume of the air flow and the blown air volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the present utility model.

[0018] Figure 2 is a schematic structural diagram of another angle of the present utility model.

[0019] Figure 3 is an exploded structural diagram of the present utility model.

[0020] Figure 4 is a sectional structural diagram of the present utility model.

[0021] Figure 5It is a schematic diagram of the first housing structure.

[0022] Figure 6 It is a schematic diagram of the structure of the fan blade.

[0023] Figure 7 It is a schematic diagram of the structure of the fan blade.

[0024] Figure 8 It is a schematic diagram of the structure of the fan blade.

[0025] Figure 9 It is a schematic diagram of the structure of the fan blade.

[0026] Figure 10 It is a schematic diagram of the structure of the fan blade.

[0027] Figure 11 It is a schematic diagram of the structure of the second housing.

[0028] Figure 12 It is a schematic diagram of the structures of the first housing and the second housing.

[0029] Figure 13 It is a schematic diagram of the structure of the air inlet area.

[0030] Figure 14 It is a schematic diagram of the structure of the air outlet area.

[0031] Reference numerals: 1, the first housing; 2, the second housing; 3, the motor; 4, the fan blade; 5, the motor mounting base; 6, the first pressing piece; 7, the first outer ring; 8, the first speed-increasing air duct; 9, the hub; 10, the blade; 11, the leading edge; 12, the outer edge; 13, the trailing edge; 14, the inner edge; 15, the upper part of the blade tail; 16, the lower part of the blade tail; 17, the windward surface; 18, the leeward surface; 19, the second outer ring; 20, the pressurizing seat; 21, the second pressing piece; 22, the second speed-increasing air duct; 23, the upper part of the blade tip; 24, the air inlet area; 25, the lower part of the blade tip; 26, the air outlet area; 27, the storage part; 28, the rotating shaft; 29, the magnetic ring. Detailed implementation manners

[0032] The following further elaborates on the present utility model in conjunction with the attached drawings.

[0033] The embodiments described with reference to the accompanying drawings are exemplary and are intended to explain the present application, and should not be construed as limiting the present application. In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, the meanings of "a number of" and "a plurality of" are two or more, unless otherwise specifically and clearly defined. In the present application, unless otherwise clearly specified and limited, the terms "mounted", "connected", "connected to", "fixed" and other terms should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances. In the present application, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the horizontal height of the first feature is lower than that of the second feature.

[0034] As Figure 1-12As shown in the figure, a low-noise high-pressure dual-function axial fan module is provided, which includes a first housing 1, a second housing 2, a motor 3 and a fan blade 4; the first housing 1, the first housing 1 is located at the air inlet end; the first housing 1 includes a motor mounting seat 5, more than one first pressure plate 6 and a first outer ring 7; the first pressure plates 6 are distributed on the inner wall of the first outer ring 7 and extend to connect the outer periphery of the motor mounting seat 5; the inner wall of the first outer ring 7, the first pressure plates 6 and the motor mounting seat 5 form a first speed-up air duct 8, and the first speed-up air duct 8 increases through the first pressure plates 6, resulting in a smaller radial ventilation area, thereby pressurizing and accelerating the air flow; the motor 3, the motor 3 is arranged on the motor mounting seat 5; the fan blade 4, the fan blade 4 is arranged at the output end of the motor 3, the fan blade 4 includes a hub 9 and blades 10 evenly distributed along the outer peripheral surface of the hub 9, the blades 10 include a leading edge 11, an outer edge 12, a trailing edge 13 and an inner edge 14; wherein, the inner edge 14 is spirally arranged on the outer peripheral surface of the hub 9, the outer edge 12 is arranged opposite to the inner edge 14, the leading edge 11 connects the inner edge 14 and the outer edge 12, and the trailing edge 13 is arranged opposite to the leading edge 11; the connection position of the leading edge 11 and the inner edge 14 is the upper part of the blade tail 15, and the connection position of the trailing edge 13 and the inner edge 14 is the lower part of the blade tail 16. The ratio of the distance between the upper parts of the blade tails 15 of adjacent blades 10 to the distance between the lower parts of the blade tails 16 of adjacent blades 10 is 0.8-1.2; the outer edge 12 is twisted relative to the inner edge 14 to form a curved windward surface 17 and a leeward surface 18 opposite to the windward surface 17. The windward surface 17 is an inwardly concave arc structure, and the leeward surface 18 is an outwardly convex arc structure; the second housing 2, the second housing 2 is located at the air outlet end and is connected to the first housing 1; the second housing 2 includes a second outer ring 19, a pressurizing seat 20 and more than one second pressure plate 21; the second pressure plates 21 are distributed on the inner wall of the second outer ring 19 and extend to connect the outer periphery of the pressurizing seat 20; the inner wall of the second outer ring 19, the second pressure plates 21 and the pressurizing seat 20 form a second speed-up air duct 22, and the second speed-up air duct 22 increases through the second pressure plates 21, resulting in a smaller radial ventilation area, thereby pressurizing and accelerating the air flow; wherein, the motor 3 drives the fan blade 4 to rotate to generate negative pressure at the air inlet end to direct the air flow to the first speed-up air duct 8, and the air flow is pressurized and directed to the second speed-up air duct 22 through the first pressure plates 6 on the first outer ring 7, and the air flow is pressurized and blown out in the second speed-up air duct 22 through the second pressure plates 21; so that the air flow increases the air volume and the air supply distance after passing through the first speed-up air duct 8 and the second speed-up air duct 22.

[0035] In view of the technical problems recorded in the background art, an efficient axial fan module is provided, which mainly includes a first housing 1, a second housing 2, a motor 3 and a fan blade 4.

[0036] For the first housing 1, referring to Figure 3 and Figure 5 , for the first housing 1, the first housing 1 includes a first outer ring 7, a motor mounting seat 5, and a first pressing piece 6; the motor mounting seat 5, the first outer ring 7, and the first pressing piece 6 can be integrally formed or independent components. The motor mounting seat 5 can be arranged at the air inlet end position or the air outlet end position of the first outer ring 7. As an implementable technical solution, the motor mounting seat 5, the first outer ring 7, and the first pressing piece 6 are integrally formed and the motor mounting seat 5 is arranged at the air outlet end of the first outer ring 7. The first pressing piece 6 can be evenly distributed or unevenly distributed between the first outer ring 7 and the motor mounting seat 5. Preferably, the first pressing piece 6 is in a circumferentially uniform distribution form. Due to the presence of the first pressing piece 6, the radial ventilation area of the air flow passing through the first outer ring 7 becomes smaller, and the first housing 1 is located at the air inlet end. The air flow can suck and gather the surrounding air flow, increasing the air volume. At the same time, the air flow is pressurized to increase the air flow speed.

[0037] Such as Figure 6-8As shown, for the fan blade 4, the fan blade 4 mainly includes a hub 9 and blades 10. The hub 9 is used to install the blades 10. The blades 10 are distributed on the outer peripheral surface of the hub 9 in a circumferential array. The blades 10 and the hub 9 are of an integral structure or an independent structure. When an independent structure is adopted, the blades 10 are assembled with the hub 9 by a connecting structure. Preferably, the blades 10 and the hub 9 are of an integral structure. The blade 10 is a sheet-like structure formed by sequentially connecting a leading edge 11, an outer edge 12, a trailing edge 13, and an inner edge 14. Among them, the inner edge 14 extends in a curved manner along the central axis direction of the hub 9. The outer edge 12 is disposed opposite to the inner edge 14, and the leading edge 11 is disposed opposite to the trailing edge 13. The junction area between the leading edge 11 and the inner edge 14 is defined as the upper part 15 of the blade tip, and the junction area between the trailing edge 13 and the inner edge 14 is defined as the lower part 16 of the blade tip. During implementation, when the ratio of the spacing dimension between the upper parts 15 of the blade tips of adjacent blades 10 to the spacing dimension between the lower parts 16 of the blade tips of adjacent blades 10 is between 0.8 and 1.2, the ratio of the blades 10 is further restricted, thereby increasing the air volume. For example, the ratio of the spacing dimension between the upper parts 15 of the blade tips of adjacent blades 10 to the spacing dimension between the lower parts 16 of the blade tips of adjacent blades 10 is 0.8; the ratio of the spacing dimension between the upper parts 15 of the blade tips of adjacent blades 10 to the spacing dimension between the lower parts 16 of the blade tips of adjacent blades 10 is 1; the ratio of the spacing dimension between the upper parts 15 of the blade tips of adjacent blades 10 to the spacing dimension between the lower parts 16 of the blade tips of adjacent blades 10 is 1.2. Further, the outer edge 12 of the blade 10 is torsionally opposed to the inner edge 14 of the blade 10, forming a windward surface 17 and a leeward surface 18. Since the windward surface 17 is in a concave form and the leeward surface 18 is in a convex form, when the fan blade 4 rotates, the windward surface 17 can more easily cut the air flow, and the leeward surface 18 can guide the air flow, thereby reducing the noise of the air flow and achieving the purpose of noise reduction.

[0038] Reference Figure 3 and Figure 11 , the second housing 2 includes a second outer ring 19, a pressurizing seat 20, and a second pressurizing piece 21. Among them, the second outer ring 19, the pressurizing seat 20, and the second pressurizing piece 21 can be integrally formed or in the form of independent components. Preferably, the second outer ring 19, the pressurizing seat 20, and the second pressurizing piece 21 are integrally formed. The second housing 2 can be in an integral form or an independent component form with the first housing 1. The second pressurizing piece 21 can be uniformly distributed or non-uniformly distributed between the second outer ring 19 and the pressurizing seat 20. Preferably, the second pressurizing piece 21 is in a circumferentially uniform distribution form. The presence of the second pressurizing piece 21 in the second speed increasing air duct 22 causes the radial ventilation area of the air flow passing through the second outer ring 19 to become smaller, further pressurizing the air flow and increasing the air flow speed.

[0039] The ratio of the length of the inner edge 14 to the length of the outer edge 12 is 0.4 to 0.9. In practice, when limiting the ratio between the length of the inner edge 14 and the length of the outer edge 12, limiting the inner edge 14 on the hub 9 of the fan blade 4 and the outer edge 12 away from the hub 9 can also increase the amount of air pumped by the fan blade 4 when it rotates. For example, the ratio of the length of the inner edge 14 to the length of the outer edge 12 is 0.4, the ratio of the length of the inner edge 14 to the length of the outer edge 12 is 0.65, and the ratio of the length of the inner edge 14 to the length of the outer edge 12 is 0.9.

[0040] The ratio of the length of the leading edge 11 to the length of the trailing edge 13 is 0.7 to 1.3. In practice, when the ratio between the length of the leading edge 11 and the length of the trailing edge 13 is limited, the fan blade 4 can also increase the amount of air pumped when rotating. For example, the ratio of the length of the leading edge 11 to the length of the trailing edge 13 is 0.7; the ratio of the length of the leading edge 11 to the length of the trailing edge 13 is 1; the ratio of the length of the leading edge 11 to the length of the trailing edge 13 is 1.3.

[0041] The outer edge 12 rotates with the center line of the hub 9 to form an equal diameter profile from the wind inlet direction to the wind outlet direction. As a preferred technical solution, in the design of the outer edge 12, when the blade 10 rotates around the center line of the hub 9, the motion profile formed by the rotation of the outer edge 12 is an equal diameter profile, that is, it presents the form of the outer peripheral surface of a cylinder, thereby improving the pumping of the airflow and increasing the amount of air blown out.

[0042] refer to Figure 8 and 13 As shown, the connection position between the leading edge 11 and the outer edge 12 is the upper part 23 of the blade tip; the leading edge 11 extends radially from the hub 9 in an arc shape; wherein, the upper part 15 of the blade tail of the adjacent blade 10, the leading edge 11 of the adjacent blade 10 and the extension line of the upper part 23 of the blade tip of the adjacent blade 10 form an air inlet area 24 for airflow to enter.

[0043] In practice, the junction area between the leading edge 11 and the outer edge 12 is defined as the blade tip upper portion 23, and the leading edge 11 is in an arc shape, so that when the blade 10 rotates, the airflow can be cut more easily to reduce noise. The airflow is pumped into the wind inlet area 24 formed by the upper portion 15 of the blade tail of the adjacent blade 10, the leading edge 11 of the adjacent blade 10, and the extension line of the upper portion 23 of the blade tip of the adjacent blade 10.

[0044] refer to Figure 8 and Figure 14As shown, the connection position of the trailing edge 13 and the outer edge 12 is the lower part of the blade tip 25, and the trailing edge 13 extends radially from the hub 9 and presents an arc shape; wherein, the extended lines of the lower part of the blade tail 16 of the adjacent blades 10, the trailing edge 13 of the adjacent blades 10 and the lower part of the blade tip 25 of the adjacent blades 10 form an air outlet area 26 for the airflow to blow out.

[0045] In implementation, the junction area of the trailing edge 13 and the outer edge 12 is defined as the lower part of the blade tip 25, and the trailing edge 13 is in an arc shape. The extended lines of the lower part of the blade tail 16 of the adjacent blades 10, the trailing edge 13 of the adjacent blades 10 and the lower part of the blade tip 25 of the adjacent blades 10 form the air outlet area 26 for the airflow to blow out.

[0046] Reference Figure 9 , preferably, the hub 9 has a recessed receiving portion 27. The hub 9 is designed to have the receiving portion 27, and a rotating shaft 28 is provided at the center line position of the hub 9. A magnetic ring 29 is provided on the inner side wall of the receiving portion 27.

[0047] The rotating shaft 28 and the magnetic ring 29 can both be installed on the hub 9, saving the number of components and making the installation more convenient.

[0048] The above does not impose any limitation on the technical scope of the present invention. Any modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A low-noise high-pressure dual-functional axial flow fan module, characterized in that, Comprising: A first housing, a second housing, a motor, and a fan blade; The first housing is located at the air inlet end. The first housing includes a motor mounting seat, one or more first pressurizing pieces, and a first outer ring. The first pressurizing pieces are distributed on the inner wall of the first outer ring and extend to connect to the outer periphery of the motor mounting seat. A first speed increasing air duct is formed by the inner wall of the first outer ring, the first pressurizing pieces, and the motor mounting seat. The first speed increasing air duct increases the radial ventilation area through the first pressurizing pieces, resulting in a smaller radial ventilation area and pressurizing and accelerating the air flow. The motor is disposed on the motor mounting seat; The fan blade is disposed on the output end of the motor. The fan blade includes a hub and blades uniformly distributed along the outer peripheral surface of the hub. The blades include a leading edge, an outer edge, a trailing edge, and an inner edge. Among them, the inner edge is spirally disposed on the outer peripheral surface of the hub, the outer edge is disposed opposite to the inner edge, the leading edge connects the inner edge and the outer edge, and the trailing edge is disposed opposite to the leading edge. The connection position of the leading edge and the inner edge is the upper part of the blade tip, and the connection position of the trailing edge and the inner edge is the lower part of the blade tip. The ratio of the distance between the upper parts of the blade tips of adjacent blades to the distance between the lower parts of the blade tips of adjacent blades is 0.8 - 1.

2. The outer edge is twisted relative to the inner edge to form a curved windward surface and a leeward surface opposite to the windward surface. The windward surface is an inwardly concave arc structure, and the leeward surface is an outwardly convex arc structure. The second housing is located at the air outlet end and is connected to the first housing. The second housing includes a second outer ring, a pressurizing seat, and one or more second pressurizing pieces. The second pressurizing pieces are distributed on the inner wall of the second outer ring and extend to connect to the outer periphery of the pressurizing seat. A second speed increasing air duct is formed by the inner wall of the second outer ring, the second pressurizing pieces, and the pressurizing seat. The second speed increasing air duct increases the radial ventilation area through the second pressurizing pieces, resulting in a smaller radial ventilation area and pressurizing and accelerating the air flow. Wherein, the motor drives the fan blade to rotate to generate a negative pressure at the air inlet end to direct the air flow to the first speed increasing air duct. The air flow is pressurized by the first pressurizing pieces on the first outer ring and directed to the second speed increasing air duct. The air flow is pressurized by the second pressurizing pieces in the second speed increasing air duct and blown out; so that the air flow increases the air volume and the air supply distance after passing through the first speed increasing air duct and the second speed increasing air duct for speed increase.

2. The low-noise high-pressure dual-functional axial flow fan module according to claim 1, wherein: The ratio of the length of the inner edge to the length of the outer edge is 0.4 - 0.

9.

3. The low-noise high-pressure dual-functional axial flow fan module according to claim 1, wherein: The ratio of the length of the leading edge to the length of the trailing edge is 0.7 - 1.

3.

4. The low-noise high-pressure dual-functional axial flow fan module according to claim 1, wherein: The outer edge rotates around the center line of the hub to form an equal-diameter profile from the air inlet direction to the air outlet direction.

5. The low-noise high-pressure dual-functional axial flow fan module according to claim 4, wherein: The connection position of the leading edge and the outer edge is the upper part of the blade tip; the leading edge extends radially from the hub and presents an arc shape; Among them, the upper part of the trailing edge of adjacent blades, the leading edge of adjacent blades, and the extension line of the upper part of the blade tip of adjacent blades form an air inlet area for air flow to enter.

6. The low-noise high-pressure dual-functional axial flow fan module according to claim 5, characterized in that: The connection position of the trailing edge and the outer edge is the lower part of the blade tip, and the trailing edge extends radially from the hub and presents an arc shape; Among them, the lower part of the trailing edge of adjacent blades, the trailing edge of adjacent blades, and the extension line of the lower part of the blade tip of adjacent blades form an air outlet area for air flow to blow out.

7. The low-noise high-pressure dual-functional axial flow fan module according to claim 6, characterized in that: The hub has a receiving portion that is recessed inward.

8. The low-noise high-pressure dual-functional axial flow fan module according to claim 7, characterized in that: A rotating shaft is provided at the center line position of the hub in the receiving portion.

9. The low-noise high-pressure dual-functional axial flow fan module according to claim 8, characterized in that: A magnetic ring is provided on the inner side wall of the receiving portion.

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