Fan assembly and air conditioning equipment
By designing the air guide channel and air outlet structure of the asymmetric fan assembly, the problem of low heat dissipation efficiency of traditional fan assemblies with asymmetric heat exchanger arrangement is solved, achieving more efficient heat dissipation and noise reduction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- GD MIDEA AIR CONDITIONING EQUIP CO LTD
- Filing Date
- 2026-02-04
- Publication Date
- 2026-05-12
AI Technical Summary
Traditional symmetrical fan components have low heat dissipation efficiency when heat exchangers are arranged asymmetrically, making it difficult to meet heat dissipation requirements.
An asymmetric fan assembly is designed, which uses an air guide ring with an air guide channel structure including an air inlet section, a throat section, and an air outlet section. The air outlet section is designed with an arc shape and a straight edge shape to guide airflow to improve heat dissipation efficiency, and a mesh cover is matched with the air guide ring to reduce noise.
It improves heat dissipation efficiency, reduces system resistance and noise, enhances the heat exchanger's heat exchange efficiency, and reduces energy loss.
Smart Images
Figure CN122014680A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of wind turbine technology, and in particular to a wind turbine component and an air conditioning device. Background Technology
[0002] In air conditioning equipment, a fan assembly typically drives airflow, which carries away heat from the surface of the heat exchanger, thereby dissipating heat from the heat exchanger. The heat exchanger is located upstream of the fan assembly. In traditional cooling system designs, for the sake of compact structure or due to space constraints, the heat exchanger is usually arranged asymmetrically on one side or around the fan assembly.
[0003] Traditional fan components are generally arranged symmetrically. For heat exchangers with asymmetrical arrangements, the traditional symmetrical fan components have low heat dissipation efficiency and are difficult to meet heat dissipation requirements. Summary of the Invention
[0004] This application provides a fan assembly, including an impeller and a guide ring. The guide ring has a guide channel, and the impeller is at least partially disposed within the guide channel. The guide channel includes an inlet section, a throat section, and an outlet section connected sequentially. The throat section is cylindrical, conforming to the sweep circle of the impeller blades. The inlet and outlet sections gradually expand in directions away from the throat section. The impeller rotates around a predetermined rotation axis and, guided by the guide channel, generates a heat exchange airflow that exchanges heat with a heat exchanger. The heat exchanger is disposed upstream of the fan assembly along the rotation axis and includes at least a first heat exchange section. The first heat exchange section is located on a first reference plane along the rotation axis. A first projection is formed, and a second projection is formed on a first reference plane along the rotation axis of the air inlet section. The first projection is located outside the second projection, and the first reference plane is perpendicular to the rotation axis. The air outlet section includes a first part and a second part that are connected to each other circumferentially along the air guide channel. The first part is closer to the first heat exchange section than the second part. The end of the first part away from the throat section is provided with a first air outlet profile, and the end of the second part away from the throat section is provided with a second air outlet profile. The first air outlet profile is at least partially an arc shape that conforms to the blade sweep circle, and the second air outlet profile includes at least one straight edge.
[0005] In some embodiments, the second air outlet profile includes multiple straight edges that are smoothly connected.
[0006] In some embodiments, the first reference plane passes through the air outlet section; on the first reference plane, the expansion angle of the second portion relative to the throat section is greater than the expansion angle of the first portion relative to the throat section.
[0007] In some embodiments, the air guide ring is a square air guide ring; on the first reference plane, the second portion has a first expansion angle relative to the throat section in the area near the corner of the square air guide ring, and the second portion has a second expansion angle relative to the throat section in the area near the midpoint of the frame of the square air guide ring, the second expansion angle being smaller than the first expansion angle.
[0008] In some embodiments, the second air outlet profile is located outside the reference circle corresponding to the first air outlet profile.
[0009] In some embodiments, the air guide ring has a second reference plane, which passes through the rotation axis of the impeller and divides the air outlet section into a first part and a second part; the first air outlet profile and the second reference plane enclose a first air outlet area, and the second air outlet profile and the second reference plane enclose a second air outlet area, the area of the second air outlet area being larger than the area of the first air outlet area.
[0010] In some embodiments, the fan assembly further includes a mesh cover, which is disposed at the end of the air outlet section away from the throat section. The mesh cover includes a first cover portion and a second cover portion. The first cover portion is disposed over a first air outlet area, and the second cover portion is disposed over a second air outlet area. The outer contour shape of the first cover portion is consistent with the first air outlet contour, and the outer contour shape of the second cover portion is consistent with the outer contour of the air guide ring.
[0011] In some embodiments, the end of the air inlet section away from the throat section is provided with an air inlet profile, which is a circle that conforms to the blade sweep circle.
[0012] In some embodiments, the length of the air outlet section is greater than the length of the throat section along the rotation axis.
[0013] In another aspect, this application provides an air conditioning device, including a heat exchanger and the aforementioned fan assembly. The heat exchanger is disposed upstream of the fan assembly along a rotation axis and has at least a first heat exchange section. The first heat exchange section forms a first projection on a first reference plane along the rotation axis, and the air inlet section forms a second projection on the first reference plane along the rotation axis. The first projection is located outside the second projection.
[0014] In some embodiments, the heat exchanger includes a second heat exchange section that is bent and connected to the first heat exchange section, the projection of the second heat exchange section along the axis of rotation at least partially covering the air inlet section.
[0015] In this application, the heat exchanger includes at least a first heat exchange section. The first heat exchange section forms a first projection on a first reference plane along the rotation axis, and the air inlet section forms a second projection on the first reference plane along the rotation axis. The first projection is located outside the first projection, meaning the heat exchanger is asymmetrically arranged. By setting at least part of the first air outlet profile near the first heat exchange section to an arc shape, it is beneficial to constrain the radially diffusing airflow, reduce the risk of airflow dead zones or short-circuit phenomena, and thus guide the airflow to flow more efficiently towards the atmosphere. By setting the second air outlet profile away from the first heat exchange section to include at least one straight edge, the airflow can expand outward along the straight edge, forming a stable wall jet, which is beneficial to reduce the outlet airflow velocity, convert more of the airflow's kinetic energy into static pressure energy, reduce dynamic pressure loss, thereby reducing system resistance and improving heat dissipation efficiency. In addition, the reduced outlet airflow velocity also helps to reduce noise. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 This is a schematic diagram of the overall structure of an air conditioning device provided in one embodiment of this application; Figure 2 yes Figure 1 A schematic diagram of the air conditioning equipment shown from another angle; Figure 3 yes Figure 1 A schematic diagram of the structure of the air guide ring in the middle; Figure 4 yes Figure 1 A schematic diagram of the air guide ring in another angle; Figure 5 yes Figure 1 A schematic diagram of the structure of the air guide ring when viewed along the direction p1 perpendicular to the reference plane P1 (the reference plane P1 passes through the rotation axis of the impeller); Figure 6 yes Figure 1 A schematic diagram of the structure of the guide ring when viewed along the direction p2 perpendicular to the reference plane P2 (the reference plane P2 passes through the rotation axis of the impeller); Figure 7 yes Figure 1 A schematic diagram of the structure of the mesh cover in the diagram; Figure 8 This is a power variation curve of a wind turbine assembly provided in one embodiment of this application and a conventional symmetrical wind turbine assembly; Figure 9 This is a schematic diagram of the noise test spectrum results of a wind turbine assembly provided in one embodiment of this application and a conventional symmetrical wind turbine assembly. Detailed Implementation
[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.
[0019] The terms "first" and "second" used in the embodiments of this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.
[0020] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.
[0021] This application provides a wind turbine assembly 10, such as Figures 1 to 3 As shown, the fan assembly 10 includes an impeller 11 and a guide ring 12. The guide ring 12 is provided with a guide channel 121, and the impeller 11 is at least partially disposed within the guide channel 121. The impeller 11 rotates around a preset rotation axis L and generates a heat exchange airflow that exchanges heat with the heat exchanger 20 under the guidance of the guide channel 121.
[0022] See also Figure 1 and Figure 2 The air guide ring 12 is a square air guide ring. It is understood that the air guide ring 12 can also be in other shapes, and this application does not limit it.
[0023] In this application, "the air guide ring 12 is a square air guide ring" means that the outer contour of the air guide ring 12 is square. The outer contour of the air guide ring 12 refers to the largest closed contour formed by the projection of the air guide ring 12 along the rotation axis L. The term "square" as described in this application includes both squares and rectangles.
[0024] like Figure 2 and Figure 3 As shown, the air guide channel 121 includes an air inlet section 1211, a throat section 1212, and an air outlet section 1213 connected in sequence. The throat section 1212 is arranged in a cylindrical shape that is adapted to the sweeping circle of the blades of the impeller 11. The air inlet section 1211 and the air outlet section 1213 gradually expand in the direction away from the throat section 1212.
[0025] Among them, "blade sweep circle" refers to the circular trajectory traced by the tip of the blade when the impeller 11 rotates.
[0026] like Figure 1 and Figure 2 As shown, the heat exchanger 20 is disposed upstream of the fan assembly 10 along the rotation axis L and includes at least a first heat exchange section 21. The first heat exchange section 21 forms a first projection on a first reference plane along the rotation axis L, and the air inlet section 1211 forms a second projection on the first reference plane along the rotation axis L. The first projection is located outside the second projection, wherein the first reference plane is perpendicular to the rotation axis L. Airflow can enter the fan assembly 10 through the first heat exchange section 21, thereby dissipating heat from the first heat exchange section 21.
[0027] like Figure 2 and Figure 4 As shown, the air outlet section 1213 includes a first part 12131 and a second part 12132 connected to each other circumferentially along the air guide channel 121. The first part 12131 is closer to the first heat exchange section 21 than the second part 12132. The end of the first part 12131 opposite to the throat section 1212 is provided with a first air outlet profile 12131a, and the end of the second part 12132 opposite to the throat section 1212 is provided with a second air outlet profile 12132b. The first air outlet profile 12131a is at least partially arc-shaped, conforming to the blade sweep circle, and the second air outlet profile 12132b includes at least one straight edge.
[0028] The air outlet profile refers to the closed profile formed by the boundary of the area that the airflow can effectively reach or influence when it reaches the end of the air outlet section 1213 away from the throat section 1212.
[0029] According to the law of conservation of energy (Bernoulli's equation), the total mechanical energy of an ideal fluid remains constant along a streamline. For a horizontal duct, the formula can be simplified to: static pressure (P) + dynamic pressure (1 / 2ρV²) = constant (total pressure).
[0030] Where ρ is the fluid density, therefore, when the total pressure remains basically constant, a decrease in flow velocity (V) (a decrease in dynamic pressure) will cause an increase in static pressure (P).
[0031] In this application, the heat exchanger 20 includes at least a first heat exchange section 21. The first heat exchange section 21 forms a first projection on a first reference plane along the rotation axis L, and the air inlet section 1211 forms a second projection on the first reference plane along the rotation axis L. The first projection is located outside the second projection, meaning the heat exchanger 20 is asymmetrically arranged. By setting the first air outlet profile 12131a near the first heat exchange section 21 to at least partially arc-shaped, it is beneficial to constrain the radially diffused airflow, reduce the risk of airflow dead zones or short-circuit phenomena, and thus guide the airflow to flow more efficiently towards the atmosphere. By setting the second air outlet profile 12132b away from the first heat exchange section 21 to include at least one straight edge, the airflow can expand outward along the straight edge, forming a stable wall jet, which is beneficial to reduce the outlet airflow velocity, convert more of the airflow's kinetic energy into static pressure energy, reduce dynamic pressure loss, thereby reducing system resistance and improving heat dissipation efficiency. In addition, the reduced outlet airflow velocity also helps to reduce noise.
[0032] In some embodiments, such as Figure 4 As shown, the second air outlet profile 12132b may include multiple straight edges that are smoothly connected.
[0033] On the one hand, the second air outlet profile 12132b is roughly polygonal. Utilizing the diffusion effect of the polygon, the second part 12132 can form a highly efficient diffuser, which is beneficial to further improve the deceleration and diffusion effect, converting more of the airflow's kinetic energy into static pressure energy, thereby reducing system resistance and improving heat dissipation efficiency. On the other hand, the smooth transition between the multiple straight edges helps reduce the risk of airflow separation from the wall of the second part 12132, reduces vortex losses, and is conducive to improving the diffusion effect.
[0034] In some embodiments, such as Figure 4 As shown, the second air outlet profile 12132b can be located outside the reference circle corresponding to the first air outlet profile 12131a.
[0035] Among them, "the reference circle corresponding to the first air outlet profile 12131a" refers to the circle drawn with the center of the arc-shaped first air outlet profile 12131a as the center and the radius of the first air outlet profile 12131a as the radius.
[0036] According to the law of conservation of mass (continuity equation) in fluid mechanics, for incompressible fluids (such as air at low speeds), the volumetric flow rate is constant, and the volumetric flow rate = pipe cross-sectional area × fluid velocity.
[0037] By setting the second air outlet profile 12132b to be located outside the reference circle corresponding to the first air outlet profile 12131a, the air outlet area of the second part 12132 can be increased. According to the law of conservation of mass, the increased air outlet area of the second part 12132 is conducive to reducing the airflow velocity, thereby improving the diffusion capacity of the second part 12132, converting more of the kinetic energy of the airflow into static pressure energy, improving heat dissipation efficiency and reducing noise.
[0038] In some embodiments, the first reference plane may pass through the air outlet section 1213.
[0039] On any first reference plane, let d be the distance between a certain position on the outlet section 1213 and the end of the throat section 1212 closest to the outlet section 1213, let r1 be the radius of the equivalent circle corresponding to that position, and let r2 be the radius of the throat section. Then, the expansion angle α of that position relative to the throat section 1212 is α = arctan[(r1-r2) / d]. The expansion angle α can be used to describe the degree of expansion of the cross-sectional area of the outlet section 1213.
[0040] On any first reference plane, the expansion angle of the second portion 12132 relative to the throat segment 1212 can be greater than the expansion angle of the first portion 12131 relative to the throat segment 1212.
[0041] See also Figure 4 and Figure 5 The air guide ring 12 may have a reference plane P1, which passes through the rotation axis L of the impeller 11 and the diagonal of the square air guide ring 12. Taking the side of the air guide ring 12 facing away from the heat exchanger 20 as the first reference plane, and observing along the direction p1 perpendicular to the reference plane P1, the expansion angle α2 of point A2 on the second part 12132 relative to the throat section 1212 may be greater than the expansion angle α1 of point A1 on the first part 12131 relative to the throat section 1212.
[0042] See also Figure 4 and Figure 6 The air guide ring 12 may also have a reference plane P2, which passes through the rotation axis L of the impeller 11 and the midpoint of the square air guide ring 12 near the edge of the first heat exchange section 21. Taking the side surface of the air guide ring 12 facing away from the heat exchanger 20 as the first reference plane, and observing along the direction p2 perpendicular to the reference plane P2, the expansion angle α4 of point B2 on the second part 12132 relative to the throat section 1212 can be greater than the expansion angle α3 of point B1 on the first part 12131 relative to the throat section 1212.
[0043] By setting a larger expansion angle for the second part 12132, the air outlet area of the second part 12132 can be increased, which helps to reduce the airflow speed, improve the diffusion capacity of the second part 12132, and convert more of the kinetic energy of the airflow into static pressure energy, which helps to improve heat dissipation efficiency and reduce noise.
[0044] In some embodiments, such as Figure 4 As shown, the air guide ring 12 is a square air guide ring. (See also...) Figure 4 and Figure 5 Viewed along the p1 direction on the first reference plane, the second part 12132, in the region near the corner of the square guide ring 12, can have a first expansion angle α2 relative to the throat section 1212, in conjunction with the reference... Figure 4 and Figure 6 Observing along the p2 direction, the area of the second part 12132 near the midpoint of the frame of the square air guide ring 12 can have a second expansion angle α4 relative to the throat section 1212, and the second expansion angle α4 can be smaller than the first expansion angle α2.
[0045] The corner region of the square air guide ring 12 refers to the local area formed by the vertex of the square air guide ring 12 and its adjacent parts, for example, Figure 4 In the M region, the midpoint region of the border of the square air guide ring 12 refers to the local area near the midpoint of each side of the square air guide ring 12, for example... Figure 4 N region in the middle.
[0046] By setting the first expansion angle α2 to be larger, the space at the corner of the air guide ring 12 can be fully utilized, the air outlet area of the second part 12132 can be increased, and the diffusion capacity of the second part 12132 can be further improved, so that more of the kinetic energy of the airflow can be converted into static pressure energy, which is conducive to improving heat dissipation efficiency and reducing noise.
[0047] like Figure 2 and Figure 4 As shown, the air guide ring 12 may also have a second reference plane P0, which passes through the rotation axis L of the impeller 11 and can divide the air outlet section 1213 into a first part 12131 and a second part 12132.
[0048] The first air outlet profile 12131a can be enclosed by the second reference plane P0 to form a first air outlet region 1213a, and the second air outlet profile 12132b can be enclosed by the second reference plane P0 to form a second air outlet region 1213b. The area of the second air outlet region 1213b can be larger than the area of the first air outlet region 1213a, thereby increasing the air outlet area of the second part 12132, further improving the diffusion capacity of the second part 12132, and converting more of the kinetic energy of the airflow into static pressure energy, which is beneficial to improving heat dissipation efficiency and reducing noise.
[0049] In some embodiments, such as Figure 3 As shown, the end of the air inlet section 1211 away from the throat section 1212 may be provided with an air inlet profile 12111, which may be a circle that is adapted to the blade sweep circle.
[0050] Among them, the air intake profile 12111 refers to the closed profile formed by the boundary of the area that the airflow can effectively reach or influence when it reaches the end of the air intake section 1211 away from the throat section 1212.
[0051] When the fan assembly 10 is running, a negative pressure can be formed at the end of the air inlet section 1211 away from the throat section 1212, such as... Figure 2 As shown, by setting the air inlet profile 12111 to an arc shape, the airflow flowing through the first heat exchange section 21 can smoothly turn along a smooth arc and enter the throat section 1212 of the air guide channel 121 under the guidance of the arc shape.
[0052] In some embodiments, such as Figure 2 As shown, along the rotation axis L, the length of the outlet section 1213 can be greater than the length of the throat section 1212. This arrangement helps to increase the cross-sectional area of the outlet section 1213. At the same time, by controlling the expansion angle α within a reasonable range, it helps to reduce the risk of airflow separation from the wall of the outlet section 1213, further improving the diffusion capacity of the outlet section 1213, converting more of the kinetic energy of the airflow into static pressure energy, thereby reducing the airflow velocity.
[0053] See also Figure 1 , Figure 2 and Figure 7 The fan assembly 10 may also include a screen 13, which may be installed on the end of the outlet section 1213 away from the throat section 1212. The airflow may flow to the atmosphere in sequence through the heat exchanger 20, the air guide ring 12 and the screen 13.
[0054] like Figure 7 As shown, the mesh cover 13 may include a first cover portion 131 and a second cover portion 132. The first cover portion 131 covers the first air outlet area 1213a, and the second cover portion 132 covers the second air outlet area 1213b. The outer contour shape of the first cover portion 131 may be consistent with the first air outlet contour 12131a, and the outer contour shape of the second cover portion 132 may be consistent with the outer contour of the air guide ring 12.
[0055] By matching the structure of the mesh cover 13 with the air guide ring 12, the first cover part 131 is arc-shaped, which can reduce the interference with the airflow and constrain the radially diffused airflow of the air guide ring 12; the second cover part 132 is square, consistent with the outer contour of the air guide ring 12, which can cover the second air outlet contour 12132b of the air outlet section 1213, which is conducive to expanding the air outlet area, thereby minimizing the obstruction effect of the mesh cover 13 itself on the airflow, further reducing the total pressure loss of the system, and enabling the airflow to be discharged into the atmosphere with a lower flow rate and noise.
[0056] In some embodiments, the ribs of the mesh cover 13 may be arc-shaped, and the direction of the ribs may match the airflow velocity distribution of the fan assembly 10, thereby reducing the obstruction to the airflow and ensuring that the airflow can flow smoothly over the ribs, so as to reduce noise and eddy current loss.
[0057] like Figure 8 As shown, compared to the prototype housing (i.e., the traditional symmetrical fan assembly structure), the asymmetrical fan assembly housing provided in this application reduces the total power consumption of the system when the ventilation volume is equal. For example, when the ventilation volume is 7700 cmh, the total power of the system is reduced by about 5%, which improves the heat exchange efficiency of the heat exchanger.
[0058] like Figure 9 As shown, the noise test spectrum results show that, compared with the prototype enclosure, the noise was reduced by 1.3 dB at an air volume of 7700 cmh, and the overall NVH (NVH is an abbreviation for Noise, Vibration and Harshness) performance of the unit was significantly improved.
[0059] like Figure 1 and Figure 2 As shown, this application also provides an air conditioning device 1, which may include a heat exchanger 20 and a fan assembly 10 as described above. Along the rotation axis L, the heat exchanger 20 is disposed upstream of the fan assembly 10. The fan assembly 10 can drive airflow, using the air to carry away heat from the surface of the heat exchanger 20, thereby dissipating heat from the heat exchanger 20.
[0060] like Figure 2As shown, the heat exchanger 20 may include a first heat exchange section 21 and a second heat exchange section 22 bent and connected to the first heat exchange section 21. The first heat exchange section 21 forms a first projection along the rotation axis L on a first reference plane, and the air inlet section 1211 forms a second projection along the rotation axis L on the first reference plane, with the first projection located outside the second projection. The projection of the second heat exchange section 22 along the rotation axis L can at least partially cover the air inlet section 1211. This shortens the airflow heat exchange path, reduces energy loss, and improves heat exchange efficiency. Simultaneously, it also improves space utilization, which helps to reduce the overall volume of the air conditioning equipment 1.
[0061] When the air conditioning equipment 1 is working, the airflow can enter the fan assembly 10 through the first heat exchange section 21 and the second heat exchange section 22. Specifically, as shown in the figure... Figure 2 As shown, the airflow can smoothly enter the fan assembly 10 by turning along a smooth arc after passing through the first heat exchange section 21 with minimal energy loss. The airflow can also enter the fan assembly 10 from the second heat exchange section 22 along the rotation axis L.
[0062] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.
Claims
1. A fan assembly, characterized in that, The fan assembly includes an impeller and a guide ring, the guide ring is provided with a guide channel, and the impeller is at least partially disposed within the guide channel; The air guide channel includes an air inlet section, a throat section, and an air outlet section connected in sequence. The throat section is cylindrical in shape, adapted to the sweeping circle of the impeller blades. The air inlet section and the air outlet section gradually expand in the direction away from the throat section. The impeller rotates around a preset rotation axis and generates a heat exchange airflow that exchanges heat with the heat exchanger under the guidance of the air guide channel. The heat exchanger is located upstream of the fan assembly along the rotation axis and includes at least a first heat exchange part. The first heat exchange part forms a first projection on a first reference plane along the rotation axis. The air inlet section forms a second projection on the first reference plane along the rotation axis. The first projection is located outside the second projection. The first reference plane is perpendicular to the rotation axis. The air outlet section includes a first part and a second part that are connected to each other circumferentially along the air guide channel. The first part is closer to the first heat exchange section than the second part. The end of the first part away from the throat section is provided with a first air outlet profile. The end of the second part away from the throat section is provided with a second air outlet profile. The first air outlet profile is at least partially an arc shape that conforms to the sweep circle of the blades. The second air outlet profile includes at least one straight edge.
2. The wind turbine assembly according to claim 1, characterized in that, The second air outlet profile includes multiple straight edges that are smoothly connected.
3. The wind turbine assembly according to claim 2, characterized in that, The first reference plane passes through the air outlet section; On the first reference plane, the expansion angle of the second portion relative to the throat segment is greater than the expansion angle of the first portion relative to the throat segment.
4. The wind turbine assembly according to claim 3, characterized in that, The air guide ring is a square air guide ring; On the first reference plane, the second portion has a first expansion angle relative to the throat section in the area near the corner of the square air guide ring, and the second portion has a second expansion angle relative to the throat section in the area near the midpoint of the frame of the square air guide ring, the second expansion angle being smaller than the first expansion angle.
5. The wind turbine assembly according to claim 2, characterized in that, The second air outlet profile is located outside the reference circle corresponding to the first air outlet profile.
6. The wind turbine assembly according to claim 2, characterized in that, The air guide ring has a second reference plane, which passes through the rotation axis of the impeller and divides the air outlet section into the first part and the second part; The first air outlet contour and the second reference plane enclose a first air outlet area, and the second air outlet contour and the second reference plane enclose a second air outlet area, the area of the second air outlet area being larger than the area of the first air outlet area.
7. The wind turbine assembly according to claim 6, characterized in that, The fan assembly also includes a mesh cover, which is disposed on the end of the air outlet section away from the throat section. The mesh cover includes a first cover portion and a second cover portion, with the first cover portion covering the first air outlet area and the second cover portion covering the second air outlet area. The outer contour shape of the first cover portion is consistent with the first air outlet contour, and the outer contour shape of the second cover portion is consistent with the outer contour of the air guide ring.
8. The wind turbine assembly according to claim 1, characterized in that, The air inlet section is provided with an air inlet profile at the end opposite to the throat section, and the air inlet profile is a circle that conforms to the sweeping circle of the blade.
9. The wind turbine assembly according to any one of claims 1-8, characterized in that, Along the rotation axis, the length of the air outlet section is greater than the length of the throat section.
10. An air conditioning device, characterized in that, The air conditioning device includes a heat exchanger and a fan assembly according to any one of claims 1-9. The heat exchanger is disposed upstream of the fan assembly along the rotation axis and has at least a first heat exchange section. The first heat exchange section forms a first projection on the first reference plane along the rotation axis. The air inlet section forms a second projection on the first reference plane along the rotation axis. The first projection is located outside the second projection.
11. The air conditioning device according to claim 10, characterized in that, The heat exchanger includes a second heat exchange section that is bent and connected to the first heat exchange section, and the projection of the second heat exchange section along the rotation axis at least partially covers the air inlet section.