A fan assembly, an air conditioner and an air conditioning system

Abstract

The application provides a fan assembly, an air conditioner and an air conditioning system. The fan assembly comprises an air duct volute, a motor support and double-suction centrifugal fan blades arranged in the air duct volute. The air duct volute is provided with a first air inlet and a second air inlet corresponding to air suction ports of the double-suction centrifugal fan blades. The motor support is arranged in the first air inlet and connected with a motor of the double-suction centrifugal fan blades. The air inlet area ratio of the first air inlet S1 and the second air inlet S2 satisfies: S1 / S2=1.5-2.5. The application can reduce the pressure difference generated in the air duct and the mutual impact of air flow by reasonably arranging the air inlet area of both sides of the air duct, thereby improving the air volume of the fan system.

Description

Technical Field

[0001] This invention belongs to the field of air conditioner technology, specifically relating to a fan assembly, an air conditioner, and an air conditioning system. Background Technology

[0002] Distributed air conditioning systems, with their unique air outlet methods—shower-style cooling and carpet-like heating—have gained high recognition in the air conditioning market. However, the high cost and relative immaturity of top-and-bottom air outlet technology currently result in a low market share. Therefore, there is an urgent need to tackle cost reduction technologies for distributed air supply platforms to lower the overall cost and overcome related technological bottlenecks. Because dual-suction centrifugal fans have a large flow coefficient and good noise quality, they can be used in distributed air conditioning systems to increase airflow, reduce system noise, and achieve cost reduction and efficiency improvement.

[0003] Based on distributed air supply technology, a novel dual-suction, bidirectional, single-centrifugal fan system is established. The volute duct components are placed vertically, and the dual-suction, single-centrifugal fan blades are laterally installed inside the volute duct, achieving rear-side air intake, bilateral air intake, and distributed air supply from top to bottom. This improves air supply comfort and the performance of the single-centrifugal fan system while reducing the cost of distributed air supply technology. However, to achieve bilateral air intake and top-to-bottom air supply in the single-centrifugal dual-suction fan duct, the fan blades and motor need to be installed inside the duct volute, thus requiring a motor support structure. The motor support structure is designed at the air inlet of the volute, making its design crucial for duct design, air conditioning performance, and noise levels. Since the dual-suction, bidirectional fan involves bilateral air intake, uneven air intake by the fan blades can lead to turbulent flow. This causes the airflow from both inlets to converge inside the duct, resulting in airflow impact and reducing the fan system's airflow volume. It also easily generates aerodynamic noise, negatively affecting the user experience. Summary of the Invention

[0004] This invention provides a fan assembly, an air conditioner, and an air conditioning system. By reasonably setting the air inlet area on both sides of the duct casing, the pressure difference generated in the duct can be reduced, the mutual impact of airflow can be reduced, thereby increasing the air volume of the fan system.

[0005] This invention provides a fan assembly, an air conditioner, and an air conditioning system, including a duct casing, a motor bracket, and a double-suction centrifugal fan blade disposed within the duct casing; the duct casing is provided with a first air inlet and a second air inlet corresponding to the air intake of the double-suction centrifugal fan blade; the motor bracket is disposed within the first air inlet and connected to the motor of the double-suction centrifugal fan blade; wherein, the ratio of the air intake area S1 of the first air inlet to the air intake area S2 of the second air inlet satisfies:

[0006] In some embodiments, the motor bracket includes a central bracket ring and a plurality of bracket ribs arranged in an array along the central bracket ring, with one end of the plurality of bracket ribs away from the central bracket ring connected to the duct volute.

[0007] In some implementations, the number of support ribs is three or four.

[0008] In some embodiments, the duct casing is provided with a plurality of first support plates near the motor bracket.

[0009] In some embodiments, a second support plate is provided on the motor bracket, and the center distance between the second support plate and the center ring of the bracket is 35-45mm.

[0010] In some embodiments, the motor bracket has a central mounting position, which has a mounting angle relative to the circumference of the first air inlet, and the angle of the mounting angle can be adjusted from -30° to 30°.

[0011] In some embodiments, the duct housing is vertically arranged, and the motor bracket and the duct housing have a duct angle θ in the vertical direction, which satisfies: -5°≤θ≤15°.

[0012] In some embodiments, the duct housing has a fan blade mounting cavity and multiple air outlet ducts communicating with the fan blade mounting cavity.

[0013] In some embodiments, the plurality of air outlet ducts include a first air outlet duct and a second air outlet duct, wherein the air outlets of the first air outlet duct and the second air outlet duct are oriented in opposite directions.

[0014] In some embodiments, the duct volute includes a volute body and a volute cover that are interlocked with each other. The volute body is provided with a first air inlet, and the volute cover is provided with a second air inlet.

[0015] An air conditioner includes a heat exchanger, a third air inlet, and the aforementioned fan assembly, wherein the third air inlet faces the heat exchanger.

[0016] An air conditioning system includes an air conditioner, wherein the air conditioner is the air conditioner described above.

[0017] The present invention provides a fan assembly, an air conditioner, and an air conditioning system, which have the following beneficial effects:

[0018] A motor bracket is installed inside the first air inlet. The motor bracket supports and fixes the motor. During the rotation of the double-suction centrifugal fan, air enters through both the first and second air inlets, creating airflow within the duct casing. Considering that installing the motor bracket inside the first air inlet will affect the air volume and velocity at the first air inlet, the following conditions must be met: At this time, the area ratio and the difference in flow velocity within this range are small, which improves the uniformity of the airflow field on both sides of the duct volute. This results in a small pressure difference between the airflows after they converge inside the duct volute, and also reduces the impact force between the airflows. This not only increases the air volume of the fan system, but also keeps the axial forces on both sides of the duct volute balanced. Attached Figure Description

[0019] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0020] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0021] Figure 1 This is a schematic diagram of the structure of the wind turbine assembly according to an embodiment of the present invention;

[0022] Figure 2 This is an exploded view of a wind turbine assembly according to an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the structure of the volute body according to an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the structure of the volute cover according to an embodiment of the present invention;

[0025] Figure 5 This is a comparison diagram of the pressure distribution at different angles of the motor bracket according to an embodiment of the present invention;

[0026] Figure 6 This is a cloud map showing the pressure distribution at the volute tongue of the motor bracket at different angles according to an embodiment of the present invention.

[0027] Figure 7 This is a comparison diagram of the airflow velocity distribution on both sides of an embodiment of the present invention;

[0028] Figure 8 for Figure 1 Enlarged view of point A in the middle;

[0029] Figure 9This is a schematic diagram of the distribution of the support plates according to an embodiment of the present invention;

[0030] Figure 10 This is a schematic diagram of the included angle of the air duct in an embodiment of the present invention;

[0031] Figure 11 This is a comparative cloud map of the wind speed distribution of the heat exchanger in an embodiment of the present invention;

[0032] Figure 12 This is a schematic diagram of the structure of an air conditioner according to an embodiment of the present invention.

[0033] The reference numerals in the attached figures are as follows:

[0034] 1-Air duct casing; 101-Casing body; 102-Casing cover; 2-Double-suction centrifugal fan blade; 301-First air inlet; 302-Second air inlet; 303-Third air inlet; 4-Motor bracket; 401-Bracket center ring; 402-Bracket rib; 5-Motor; 6-First support plate; 701-First air outlet duct; 702-Second air outlet duct; 8-Heat exchanger; 9-Guide ring; 10-Second support plate. Detailed Implementation

[0035] 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. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. 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.

[0036] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0037] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0038] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0039] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0040] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0041] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0042] See also Figure 1and Figure 2 As shown, according to an embodiment of the present invention, a fan assembly is provided, which includes a duct casing 1, a motor bracket 4, and a double-suction centrifugal fan blade 2 disposed in the duct casing 1; the duct casing 1 is provided with a first air inlet 301 and a second air inlet 302 corresponding to the air intake of the double-suction centrifugal fan blade 2; the motor bracket 4 is disposed in the first air inlet 301 and connected to the motor 5 of the double-suction centrifugal fan blade 2; wherein, the ratio of the air intake area S1 of the first air inlet 301 to the air intake area S2 of the second air inlet 302 satisfies:

[0043] In this embodiment, the motor bracket 4 is disposed within the first air inlet 301. The motor bracket 4 is used to support and fix the motor 5. During the rotation of the double-suction centrifugal fan 2, air enters through the first air inlet 301 and the second air inlet 302 respectively, thereby generating airflow within the duct casing 1. Considering that the motor bracket 4 being disposed within the first air inlet 301 will affect the air volume and flow rate of the first air inlet 301, the air inlet area ratio of the first air inlet 301's air inlet area S1 to the second air inlet 302's air inlet area S2 must satisfy the following condition: Within this range, the area ratio and velocity difference are relatively small, improving the uniformity of the airflow field on both sides of the duct volute 1. This results in a smaller pressure difference and reduced impact force between the airflows after they converge within the duct volute 1, which not only increases the airflow of the fan system but also maintains a balance of axial forces on both sides of the duct volute 1. (See also...) Figure 7 As shown, an area ratio of less than 0.55 results in an airflow attenuation greater than 30m³. 3 / h, area ratio greater than 0.8, turbulent airflow from both sides.

[0044] Please refer to the above. Figure 3 and Figure 4 The duct volute 1 has a fan blade mounting cavity and multiple air outlet ducts connected to the fan blade mounting cavity, and the double-suction single centrifugal fan blade is laterally arranged in the fan blade mounting cavity.

[0045] Specifically, the multiple air outlet ducts include a first air outlet duct 701 and a second air outlet duct 702, with the air outlets of the first air outlet duct 701 and the second air outlet duct 702 facing opposite directions. The duct housing 1 of this invention is vertically arranged, with the first air outlet duct 701 positioned above the second air outlet duct 702. The first air outlet duct 701 has an upper air outlet, and the second air outlet duct 702 has a lower air outlet, thereby achieving air intake from both sides and distributed air delivery from top to bottom to improve user comfort. In other embodiments, provided that usage requirements are met, the air outlet directions of the first air outlet duct 701 and the second air outlet duct 702 can be interchanged, the first air outlet duct 701 and the second air outlet duct 702 can also be arranged side-by-side with air outlets on the same side, or only the first air outlet duct 701 or the second air outlet duct 702 can be provided.

[0046] In this embodiment, the duct volute 1 includes a volute body 101 and a volute cover 102 that are interlocked with each other. The volute body 101 is provided with a first air inlet 301, and the volute cover 102 is provided with a second air inlet 302.

[0047] Specifically, both the volute body 101 and the volute cover 102 include a frame and a guide ring 9. The guide ring 9 of the volute body 101 is provided with a first air inlet 301, and the guide ring 9 of the volute cover 102 is provided with a second air inlet 302. After the volute body 101 and the volute cover 102 are interlocked, a first air outlet duct 701 is formed above the volute body 101 and the volute cover 102, and a second air outlet duct 702 is formed below the volute body 101 and the volute cover 102. The two ends of the volute body 101 and the volute cover 102 are asymmetrical structures.

[0048] Please refer to the above. Figure 3 The motor bracket 4 is inverted Y-shaped. The motor bracket 4 includes a bracket center ring 401 and multiple bracket ribs 402 arranged in an array along the bracket center ring 401. The ends of the multiple bracket ribs 402 away from the bracket center ring 401 are connected to the guide ring 9 of the volute body 101. Considering demolding and cost issues, the motor bracket 4 can be integrally formed with the volute body 101.

[0049] Specifically, the number of support ribs 402 is 3 or 4. Through theoretical analysis of the airflow field of the double-suction bidirectional fan duct, and by designing a reasonable inlet area ratio on both sides of the fan duct, the number of support ribs 402 is 3 or 4. This ensures that the airflow duct 1 has sufficient strength, and the motor bracket 4 also meets the strength requirements for supporting the motor 5. This improves the uniformity of the airflow field on both sides and increases the airflow of the double-suction single centrifugal fan system. When the number of support ribs 402 is less than 3, the cantilever beam of two support ribs 402 is too long and lacks strength, making the support ribs 402 prone to breakage. Too many support ribs 402 obstruct the airflow, causing turbulent flow and generating aerodynamic noise. Tests show that when there are four ribs, the airflow is reduced by approximately 20m³ compared to three ribs. 3 / h, within an acceptable range, but when there are five ribs, the air volume decreases by 50m³ / h. 3 The air volume loss is significant due to the high air volume per hour.

[0050] See also Figure 5 As shown, the motor bracket 4 has a central mounting position, and the central mounting position has a mounting angle relative to the first air inlet 301 in the circumferential direction. The angle adjustment range of the mounting angle is -30° to 30°.

[0051] Specifically, when there are three support ribs 402, the included angle between each support rib 402 is 120°. Taking one support rib 402 as a reference... Figure 5 (b) shows an installation angle of 0°, with the bracket rib 402 positioned at the center; the bracket rib 402 rotates clockwise. Figure 5 (c) shows an installation angle of 30°. Figure 5 (d) shows an installation angle of 60°; the rib 402 of the bracket rotates counterclockwise. Figure 5 The installation angle shown in (a) is -30°.

[0052] In this embodiment, the different positions of the various support ribs 402 will have different effects on the air volume and air velocity of the first air inlet 301. Furthermore, it will also cause varying degrees of noise at the volute tongue of the duct housing 1. When the installation angle is adjusted within the range of -30° to 30°, refer to [reference needed]. Figure 5 As shown in the figure, the darker the color distribution, the greater the pressure difference; see also [reference needed]. Figure 6 As shown in (a), the installation angle is 60°. The whiter the color at the volute tongue, the greater the pressure. The more mottled the color, the more pronounced the vibration at the volute tongue. At an installation angle of 60°, there are two vibration sources at the volute tongue. The high-pressure vibration source at the volute tongue generates rotational noise. (See also...) Figure 6 As shown in (c), the installation angle is 0° at this time, the vibration source disappears and there is no sudden change in sound pressure, which can effectively eliminate rotational noise.

[0053] In this embodiment, the pressure distribution uniformity when the installation angle is in the range of -30° to 30° is higher than that when the installation angle is 60°. This allows the first air inlet 301 to avoid the low-pressure area during air intake, which can reduce airflow impact and prevent the noise generated by the high-speed airflow in the low-pressure area impacting the motor bracket 4. It effectively eliminates the rotational noise excited by the high pressure gradient at the volute tongue. After testing, the peak value of the rotational noise was reduced from 32.2dB to 25.8dB, resulting in better overall sound quality of the fan system and improved user experience.

[0054] See also Figure 3 and Figure 7 As shown, the diameter D of the first air inlet 301 and the second air inlet 302 satisfies 200≤D≤250. The diameter of the fan blade of the double-suction single centrifugal fan is 220~300mm. The parameters of the air inlet area S1 of the first air inlet 301 and the air inlet area S2 of the second air inlet 302 are designed as follows:

[0055] The air intake area S1 of the first air inlet 301 satisfies:

[0056] The air intake area S2 of the second air inlet 302 satisfies:

[0057] Air intake area ratio:

[0058] Intake area ratio range:

[0059] Where a is the width of the support rib 402, b is the length of the support rib 402, and d is the diameter of the support center ring 401. The air intake area of ​​the first air inlet 301 is related to the diameter of the support center ring and the length and width of the support rib 402. Specifically, considering actual industrial applications, the diameter of the guide ring 9 of the volute body 101 must be compatible with the support rib 402. When the air intake area of ​​the first air inlet 301 is too large, that is, the larger the diameter of the guide ring 9 of the volute body 101, the less obstruction the guide ring 9 of the volute body 101 will have on the first air inlet 301. In order to meet the air intake requirements, the length of the support rib 402 is longer, and the width and thickness of the support rib 402 must be reduced, resulting in the support strength of the motor support 4 not meeting the usage requirements. When the air intake area of ​​the first air inlet 301 is too small, the air intake volume requirement cannot be met. When the air intake area S1 of the first air inlet 301 and the air intake area S2 of the second air inlet 302 meet the requirements... At that time, the first air inlet 301 can meet the air intake requirements, and the motor bracket 4 also has a certain supporting strength.

[0060] See also Figure 8 and Figure 9As shown, the air duct volute 1 is provided with a plurality of first support plates 6 near the motor bracket 4, and the motor bracket 4 is provided with a second support plate 10. The first support plates 6 and the second support plates 10 are connected to the air duct volute 1 by bolts.

[0061] In this embodiment, four first support plates 6 and one second support plate 10 are provided. The center distance e between the second support plate 10 and the center ring 401 of the support is in the range of 35-45mm. Two first support plates 6 are respectively provided on the volute body 101 and the volute cover 102. The first support plates 6 and the second support plate 10 are made of titanium alloy. The second support plate 10 can prevent the connection between the support rib 402 and the volute body 101 from breaking during transportation, thus avoiding the surge phenomenon of the fan. It is worth noting that for the second support plate 10 provided on the motor bracket 4, when the center distance between the second support plate 10 and the center ring 401 of the support is less than 35mm, it does not provide reinforcement at the connection. When the center distance between the second support plate 10 and the center ring 401 of the support is greater than 45mm, it affects the air intake of the first air inlet 301, causing the surge phenomenon of the fan.

[0062] See also Figure 10 As shown, the duct housing 1 is vertically arranged, and the motor bracket 4 has an angle θ with the vertical direction of the duct housing 1. The angle θ satisfies: -5°≤θ≤15°. (See also...) Figure 11 As shown, when the duct angle is within the specified range, the improved wind speed distribution cloud map has a uniform color distribution and uniform wind speed. When the duct angle is outside the specified range, the original wind speed distribution cloud map shows a more mottled color, unstable wind speed, and is prone to pressure differential. When the overall installation angle of the motor bracket 4 and the duct volute 1 are greater than 15°, the duct volute 1 is too close to the double-suction centrifugal fan blade 2. At high fan speeds, the outflow direction is restricted, causing airflow backflow, resulting in airflow loss, reduced fan performance, and aerodynamic noise generated by the fan system. When the duct angle is less than -5°, the overall duct is too close to the heat exchanger 8, affecting the surface wind speed distribution of the heat exchanger 8, thus affecting the heat exchange performance of the heat exchanger 8. Furthermore, collisions during transportation may cause damage to the copper pipes, posing a safety hazard.

[0063] Referring to Figure 12, an air conditioner includes a heat exchanger 8, a third air inlet 303, and the aforementioned fan assembly. The third air inlet 303 faces the heat exchanger 8. A double-suction centrifugal fan blade 2 is disposed within the duct casing 1, enabling air intake through the third air inlet 303 and air intake through the first air inlet 301 and the second air inlet 302, achieving distributed air delivery from top to bottom. This improves air delivery comfort and the performance of the single centrifugal fan system, while reducing the cost of distributed air delivery technology.

[0064] An air conditioning system includes an air conditioner, wherein the air conditioner is the air conditioner described above.

[0065] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0066] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention. The above are merely preferred embodiments of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. A fan assembly, characterized in that, include: The duct volute (1), the motor bracket (4), and the double-suction centrifugal fan blade (2) installed in the duct volute (1); The duct casing (1) is provided with a first air inlet (301) and a second air inlet (302) corresponding to the air inlet of the double-suction centrifugal fan (2); the motor bracket (4) is located in the first air inlet (301) and is connected to the motor (5) of the double-suction centrifugal fan (2); The ratio of the air inlet area S1 of the first air inlet (301) to the air inlet area S2 of the second air inlet (302) satisfies the following: The air inlet area S1 of the first air inlet (301) is the total area of ​​the first air inlet (301) minus the area of ​​the motor bracket (4); The motor bracket (4) is integrally formed with the volute body (101) of the air duct volute (1). The motor bracket (4) includes a bracket center ring (401) and a plurality of bracket ribs (402) arranged in an array along the bracket center ring (401). The ends of the plurality of bracket ribs (402) away from the bracket center ring (401) are connected to the air duct volute (1). Taking one of the bracket ribs (402) as a reference rib, the reference rib is located in the vertical direction of the first air inlet (301) at the 0° center installation position; on the cross section parallel to the first air inlet (301), relative to the 0° center installation position, the angle through which the motor bracket (4) rotates in the circumferential direction of the first air inlet (301) is the installation angle, and the angle adjustment range of the installation angle is from 30° clockwise rotation to 30° counterclockwise rotation.

2. The wind turbine assembly according to claim 1, characterized in that, The number of the support ribs (402) is 3 or 4.

3. The wind turbine assembly according to claim 1, characterized in that, The air duct volute (1) is provided with a plurality of first support plates (6) near the motor bracket (4).

4. The wind turbine assembly according to claim 3, characterized in that, A second support plate (10) is provided on the motor bracket (4), and the center distance between the second support plate (10) and the center ring (401) of the bracket is 35~45mm.

5. The wind turbine assembly according to claim 1, characterized in that, The duct volute (1) has a fan blade mounting cavity and multiple air outlet ducts connected to the fan blade mounting cavity.

6. The wind turbine assembly according to claim 5, characterized in that, The plurality of air outlet ducts include a first air outlet duct (701) and a second air outlet duct (702), wherein the air outlets of the first air outlet duct (701) and the second air outlet duct (702) are oriented in opposite directions.

7. The wind turbine assembly according to any one of claims 1 to 6, characterized in that, The duct volute (1) includes a volute body (101) and a volute cover (102) that are interlocked with each other. The volute body (101) is provided with a first air inlet (301), and the volute cover (102) is provided with a second air inlet (302).

8. An air conditioner, characterized in that, It includes a heat exchanger (8), a third air inlet (303), and a fan assembly as described in any one of claims 1 to 7, wherein the third air inlet (303) faces the heat exchanger (8).

9. An air conditioning system, characterized in that, Includes an air conditioner, wherein the air conditioner is the air conditioner as described in claim 8.

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