Fan assembly, air conditioner and air conditioning system

Abstract

A fan assembly, an air conditioner and an air conditioning system. The fan assembly comprises an air channel volute (1), a motor holder (4), and a double-suction centrifugal fan blade (2) arranged in the air channel volute (1); the air channel volute (1) is provided with a first air inlet (301) and a second air inlet (302) that are arranged corresponding to an air suction port of the double-suction centrifugal fan blade (2); the motor holder (4) is arranged in the first air inlet (301) and is connected to a motor (5) of the double-suction centrifugal fan blade (2), wherein an air inlet 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: 0.55≤formula (I)≤0.8. By reasonably setting the air inlet areas of two sides of the air channel volute (1), the pressure difference generated in an air channel can be reduced, and the mutual impact of airflow is reduced, thereby increasing the air volume of a fan system.

Description

Fan assembly, air conditioner and air conditioning system

[0001] This disclosure claims priority to the Chinese patent application filed with the China Patent Office on August 28, 2023, with application number 202311096380.9 and invention name “A fan assembly, air conditioner and air conditioning system”, the entire contents of which are incorporated by reference into this disclosure. Technical Field

[0002] The present disclosure belongs to the technical field of air conditioners, and particularly relates to a fan assembly, an air conditioner, and an air conditioning system. Background Art

[0003] Distributed air supply air conditioners (DAFs) have gained widespread recognition in the air conditioning market for their unique air delivery methods, including shower-style cooling and carpet-style heating with top-down air delivery. However, due to the high cost and relatively immature nature of this technology, market share is currently low. Therefore, it is urgent to develop cost-reduction technologies for distributed air supply platforms to lower overall unit costs and overcome related technical bottlenecks. Double-suction centrifugal fans, due to their high flow coefficient and good noise quality, can be used in DAFs to increase air volume, reduce fan system noise, and ultimately achieve cost reduction and efficiency gains.

[0004] Based on distributed air supply technology, a new double-suction, bidirectional single centrifugal fan system is established. The volute duct components are placed vertically, and the double-suction, single-centrifugal fan blades are installed laterally inside the volute duct to achieve rear-side air intake, two-side air suction, and distributed air supply up and down, thereby improving air supply comfort and single centrifugal fan system performance and reducing the cost of distributed air supply technology. However, in order for the single centrifugal, double-suction fan duct to achieve two-side air intake and up and down air supply, the fan blades and motor need to be installed inside the duct volute, so a motor support structure needs to be designed. The motor support structure is designed at the air inlet of the volute, so the design of the motor support structure is particularly important for the design of the duct and air conditioning performance, noise and sound quality. Since the double-suction, bidirectional fan has air intake on both sides, uneven air intake by the fan blades will cause the flow field to be turbulent, causing the airflows from the two air inlets to merge inside the duct and collide with each other. This not only reduces the air volume of the fan system, but also easily generates aerodynamic noise, affecting the user experience.

[0005] Summary of the Invention

[0006] The present disclosure provides a fan assembly, an air conditioner and an air conditioning system. By reasonably setting the air inlet areas on both sides of the air duct volute, the pressure difference generated in the air duct can be reduced, the mutual impact of the airflow can be reduced, and the air volume of the fan system can be increased.

[0007] The present disclosure provides a fan assembly, an air conditioner, and an air conditioning system, comprising an air duct volute, a motor bracket, and a double-suction centrifugal fan blade disposed in the air duct volute; the air duct volute 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 in the first air inlet and connected to the motor of the double-suction centrifugal fan blade; wherein the air inlet area S1 of the first air inlet and the air inlet area S2 of the second air inlet satisfy the following air inlet area ratio:

[0008] In some embodiments, the motor bracket includes a bracket center ring and a plurality of bracket ribs arranged in an array along the bracket center ring, and one end of the plurality of bracket ribs away from the bracket center ring is connected to the air duct volute.

[0009] In some embodiments, the number of the stent ribs is 3 or 4.

[0010] In some embodiments, a plurality of first support plates close to the motor bracket are provided on the air duct volute.

[0011] 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 to 45 mm.

[0012] In some embodiments, the motor bracket has a central installation position, and the central installation position has an installation angle relative to the circumference of the first air inlet, and the angle adjustment range of the installation angle is -30° to 30°.

[0013] In some embodiments, the air duct volute is vertically arranged, and the motor bracket and the air duct volute have an air duct angle θ in the vertical direction, and the air duct angle θ satisfies: -5°≤θ≤15°.

[0014] In some embodiments, the air duct volute has a blade installation cavity and a plurality of air outlet ducts communicating with the blade installation cavity.

[0015] In some embodiments, the plurality of air outlet ducts include a first air outlet duct and a second air outlet duct, and the air outlets of the first air outlet duct and the second air outlet duct are oriented in opposite directions.

[0016] In some embodiments, the air duct volute includes a volute body and a volute cover that are interlocked and connected, the volute body is provided with a first air inlet, and the volute cover is provided with a second air inlet.

[0017] An air conditioner comprises a heat exchanger, a third air inlet and the above-mentioned fan assembly, wherein the third air inlet faces the heat exchanger.

[0018] An air conditioning system includes an air conditioner, which is the above-mentioned air conditioner.

[0019] The present disclosure provides a fan assembly, an air conditioner, and an air conditioning system, which have the following beneficial effects:

[0020] The motor bracket is set in the first air inlet, and the motor bracket is set to support and fix the motor. During the rotation of the double-suction centrifugal fan blade, air is respectively taken in by the first air inlet and the second air inlet, thereby generating air flow in the air duct volute. Considering that the motor bracket is set in the first air inlet, it will affect the air intake volume and flow rate of the first air inlet. When the air intake area ratio of the first air inlet S1 and the air intake area S2 of the second air inlet satisfies: When the area ratio is within this range, the difference in flow velocity is small, which improves the uniformity of the air inlet flow field on both sides of the duct volute, so that after the airflows on both sides merge in the duct volute, the pressure difference between the airflows is small, and the impact force between the airflows is also reduced, which not only increases the air volume of the fan system, but also keeps the axial force on both sides of the duct volute balanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] To more clearly illustrate the embodiments of the present disclosure or the technical solutions in the related technologies, the following briefly introduces the drawings required for the embodiments or the related technical descriptions. Obviously, the drawings described below are merely exemplary, and those skilled in the art can, without inventive effort, derive other implementation drawings based on the provided drawings.

[0022] The structures, proportions, sizes, etc. illustrated in this specification are intended only to complement the contents disclosed herein and to facilitate understanding and reading by persons familiar with the art. They are not intended to limit the conditions under which the present disclosure may be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportions, or adjustments in sizes, without affecting the efficacy and objectives of the present disclosure, shall still fall within the scope of the technical contents disclosed in the present disclosure.

[0023] FIG1 is a schematic structural diagram of a fan assembly according to an embodiment of the present disclosure;

[0024] FIG2 is an exploded view of a fan assembly according to an embodiment of the present disclosure;

[0025] FIG3 is a schematic structural diagram of a volute body according to an embodiment of the present disclosure;

[0026] FIG4 is a schematic structural diagram of a volute cover according to an embodiment of the present disclosure;

[0027] FIG5 is a comparison diagram of pressure distribution at different angles of a motor bracket according to an embodiment of the present disclosure;

[0028] FIG6 is a cloud diagram of pressure distribution at the volute tongue when the motor bracket is at different angles according to an embodiment of the present disclosure;

[0029] FIG7 is a comparison diagram of the air flow velocity distribution of the two sides of the embodiment of the present disclosure;

[0030] Figure 8 is an enlarged view of point A in Figure 1;

[0031] FIG9 is a schematic structural diagram of the distribution of support plates according to an embodiment of the present disclosure;

[0032] FIG10 is a structural diagram of the air duct angle according to an embodiment of the present disclosure;

[0033] FIG11 is a comparative cloud diagram of wind speed distribution of a heat exchanger according to an embodiment of the present disclosure;

[0034] FIG12 is a schematic structural diagram of an air conditioner according to an embodiment of the present disclosure.

[0035] The reference numerals indicate:

[0036] 1-air duct volute; 101-volute body; 102-volute 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 DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present disclosure and its application or use. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present disclosure.

[0038] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present disclosure. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0039] It should be understood that the term "and / or" as used herein is merely a description of the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0040] Unless otherwise specifically stated, the relative arrangement of the parts and steps, the numerical expressions and the numerical values ​​set forth in these embodiments do not limit the scope of the present disclosure. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to actual proportional relationships. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as being merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0041] In the description of the present disclosure, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present disclosure and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present disclosure; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0042] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0043] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this disclosure.

[0044] With reference to Figures 1 and 2, according to an embodiment of the present disclosure, a fan assembly is provided, which includes an air duct volute 1, a motor bracket 4, and a double-suction centrifugal fan blade 2 arranged in the air duct volute 1; the air duct volute 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 arranged in the first air inlet 301 and is connected to the motor 5 of the double-suction centrifugal fan blade 2; wherein the air inlet area S1 of the first air inlet 301 and the air inlet area S2 of the second air inlet 302 satisfy the following ratio:

[0045] In this embodiment, the motor bracket 4 is disposed within the first air inlet 301 and is configured to support and fix the motor 5. During the rotation of the double-suction centrifugal fan blade 2, air is respectively introduced into the first air inlet 301 and the second air inlet 302, thereby generating airflow within the air duct volute 1. Considering that the motor bracket 4 is disposed within the first air inlet 301, it will affect the air intake volume and flow rate of the first air inlet 301. When the air intake area ratio of the first air inlet 301 and the air intake area S1 of the second air inlet 302 satisfies: When the area ratio is within this range, the difference in flow rate is small, which improves the uniformity of the air flow field on both sides of the duct volute 1. After the airflows on both sides merge in the duct volute 1, the pressure difference between the airflows is small, and the impact force between the airflows is also reduced. This can not only increase the air volume of the fan system, but also keep the axial force on both sides of the duct volute 1 balanced. As shown in Figure 7, when the area ratio is less than 0.55, the air volume attenuation is greater than 30m 3 / h, the area ratio is greater than 0.8, and the airflow on both sides is turbulent.

[0046] Please refer to FIG3 and FIG4 , the air duct volute 1 has a fan blade installation cavity and a plurality of air outlet ducts connected to the fan blade installation cavity, and the double-suction single centrifugal fan blade is laterally arranged in the fan blade installation cavity.

[0047] Specifically, the multiple air outlet ducts include a first air outlet duct 701 and a second air outlet duct 702, and the air outlets of the first air outlet duct 701 and the second air outlet duct 702 are in opposite directions. The air duct volute 1 of the present disclosure is arranged vertically, and the first air outlet duct 701 is arranged 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 realizing air intake on both sides and distributed air supply up and down to improve user comfort. In other embodiments, under the premise of meeting the use requirements, 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 outlet on the same side, or only the first air outlet duct 701 or the second air outlet duct 702 can be set.

[0048] In this embodiment, the air duct volute 1 includes a volute body 101 and a volute cover 102 that are interlocked and connected. 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.

[0049] Specifically, the volute body 101 and the volute cover 102 each 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 of the volute cover 102 is provided with a second air inlet 302. After the volute body 101 and the volute cover 102 are fastened together, 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.

[0050] Please refer to Figure 3. The motor bracket 4 is in an inverted Y shape. 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 guide ring 9 of the volute body 101. Considering the demoulding and cost issues, the motor bracket 4 can be integrally formed with the volute body 101.

[0051] Specifically, the number of the support ribs 402 is 3 or 4. Through theoretical analysis of the air duct flow field of a double-suction, bidirectional fan, and the design of a reasonable inlet area ratio on both sides of the fan air duct, while ensuring that the strength of the entire air duct volute 1 is met, the number of the support ribs 402 is 3 or 4, which can ensure that the air duct volute 1 has a certain strength, and the motor bracket 4 also meets the support strength requirements for the motor 5, thereby improving the uniformity of the air inlet flow field on both sides and increasing the air volume of the double-suction single centrifugal fan system. When the number of the support ribs 402 is less than 3, the cantilever beams of the two support ribs 402 are too long and not strong enough, and the support ribs 402 are easy to break; too many support ribs 402 hinder the air intake, causing flow field turbulence and stimulating aerodynamic noise. According to experimental tests, when there are four ribs, the air volume is reduced by about 20m compared to three ribs. 3 / h, which is within the acceptable range, but when there are five ribs, the air volume is reduced by 50m 3 / h, resulting in serious air volume loss.

[0052] 5 , the motor bracket 4 has a central installation position, which has an installation angle relative to the circumference of the first air inlet 301 , and the adjustment range of the installation angle is -30° to 30°.

[0053] Specifically, when the number of the support ribs 402 is 3, the angle between each support rib 402 is 120°, wherein, taking one support rib 402 as a reference, the installation angle shown in FIG5(b) is 0°, and the support rib 402 is located at the center installation position; the support rib 402 rotates clockwise, the installation angle shown in FIG5(c) is 30°, and the installation angle shown in FIG5(d) is 60°; the support rib 402 rotates counterclockwise, and the installation angle shown in FIG5(a) is -30°.

[0054] In this embodiment, when the various support ribs 402 are arranged at different positions, they will have different effects on the air volume and air velocity of the first air inlet 301. Secondly, they will also cause different degrees of noise to be excited at the tongue of the air duct volute 1. When the installation angle is adjusted within the range of -30° to 30°, as shown in FIG5 , the darker the color distribution in the figure, the greater the pressure difference. As shown in FIG6(a), when the installation angle is 60°, the whiter the color at the tongue, the greater the pressure, and the more mottled the color. When the installation angle is 60°, there are dual excitation sources at the tongue, and the high-pressure excitation source at the tongue excites rotational noise. As shown in FIG6(c), when the installation angle is 0°, the vibration source disappears and there is no sudden change in sound pressure, which can effectively eliminate rotational noise.

[0055] 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°, so that the first air inlet 301 avoids the low-pressure area when taking in air, which can reduce the impact of airflow, avoid the noise generated by the high-speed airflow in the low-pressure area impacting the motor bracket 4, and effectively eliminate the rotational noise excited by the high pressure gradient at the volute tongue. After experimental testing, the peak value of the rotational noise is reduced from 32.2db to 25.8db, the overall sound quality of the fan system is better, and the user experience is improved.

[0056] 3 and 7 , the diameter D of the first air inlet 301 and the second air inlet 302 satisfies 200≤D≤250, the diameter of the double-suction single centrifugal fan blade is 220-300 mm, and 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:

[0057] The air inlet area S1 of the first air inlet 301 satisfies:

[0058] The air inlet area S2 of the second air inlet 302 satisfies:

[0059] Air inlet area ratio:

[0060] Air inlet area ratio range:

[0061] Among them, a is the width of the bracket rib 402, b is the length of the bracket rib 402, and d is the diameter of the bracket center ring 401. The air inlet area of ​​the first air inlet 301 is related to the diameter of the bracket center and the length and width of the bracket rib 402. Specifically, considering the actual industrial application, the diameter of the guide ring 9 of the volute body 101 must be adapted to the bracket rib 402. When the air inlet 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 the guide ring 9 of the volute body 101 blocks the first air inlet 301. In order to meet the air intake requirements, the length of the bracket rib 402 is longer at this time, and the width and thickness of the bracket rib 402 must be reduced, resulting in the support strength of the motor bracket 4 not meeting the use requirements; when the air inlet area of ​​the first air inlet 301 is too small, it cannot meet the air intake requirement. When the air inlet area S1 of the first air inlet 301 and the air inlet area S2 of the second air inlet 302 meet When the first air inlet 301 is sufficient to meet the air intake requirement, the motor bracket 4 also has a certain supporting strength.

[0062] 8 and 9 , the air duct volute 1 is provided with a plurality of first support plates 6 close to the motor bracket 4 , and the motor bracket 4 is provided with a second support plate 10 , and the first support plate 6 and the second support plate 10 are connected to the air duct volute 1 by bolts.

[0063] 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 support center ring 401 ranges from 35 to 45 mm. Two first support plates 6 are provided on the volute body 101 and the volute cover 102, respectively. The first support plates 6 and the second support plates 10 are made of titanium alloy. The provision of the second support plate 10 can prevent the connection between the support ribs 402 and the volute body 101 from breaking during transportation, thereby avoiding fan surge. 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 support center ring 401 is less than 35 mm, the connection is not strengthened. When the center distance between the second support plate 10 and the support center ring 401 is greater than 45 mm, the air intake of the first air inlet 301 is affected, causing fan surge.

[0064] With reference to FIG10 , the duct volute 1 is vertically arranged, and the motor bracket 4 and the duct volute 1 have an air duct angle θ in the vertical direction, and the air duct angle θ satisfies: -5°≤θ≤15°. With reference to FIG11 , when the air duct angle is within the specified range, that is, the color distribution of the wind speed distribution cloud map after the improvement is uniform, and the wind speed is uniform; when the air duct angle is not within the specified range, that is, the color display of the wind speed distribution cloud map before the improvement is more mottled, the wind speed is unstable, and a pressure difference is easily generated. When the overall installation angle of the motor bracket 4 and the air duct angle of the duct volute 1 are greater than 15°, the air duct volute 1 is too close to the double-suction centrifugal fan blade 2. When the fan is at high speed, the outflow direction is restricted, causing airflow backflow, thereby causing airflow loss, reducing fan performance, and stimulating the fan system to generate aerodynamic noise. When the air duct angle is less than -5°, the entire air duct is too close to the heat exchanger 8, affecting the wind speed distribution on the surface of the heat exchanger 8, thereby affecting the heat exchange performance of the heat exchanger 8, and the copper pipe may be hit during transportation, posing a safety hazard.

[0065] 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. Dual-suction centrifugal fan blades 2 are disposed within the duct volute 1, allowing air to enter the third air inlet 303 and exit the first and second air inlets 301 and 302, respectively. This allows for vertically distributed air delivery, improving air comfort and single-centrifugal fan system performance while reducing the cost of distributed air delivery technology.

[0066] An air conditioning system includes an air conditioner, which is the above-mentioned air conditioner.

[0067] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0068] The above are merely preferred embodiments of the present disclosure and are not intended to limit the present disclosure. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present disclosure shall be included within the scope of protection of the present disclosure. The above are merely preferred embodiments of the present disclosure. It should be noted that those skilled in the art may make various improvements and variations without departing from the technical principles of the present disclosure, and such improvements and variations shall also be considered within the scope of protection of the present disclosure.

Claims

1. A fan assembly, comprising: An air duct volute (1), a motor bracket (4), and a double-suction centrifugal fan blade (2) arranged in the air duct volute (1); The air duct volute (1) is provided with a first air inlet (301) and a second air inlet (302) which are arranged corresponding to the air inlet of the double-suction centrifugal fan blade (2); the motor bracket (4) is arranged in the first air inlet (301) and is connected to the motor (5) of the double-suction centrifugal fan blade (2); Wherein, the air inlet area 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:

2. The fan assembly according to claim 1, wherein: The motor bracket (4) comprises a bracket center ring (401) and a plurality of bracket ribs (402) arranged in an array along the bracket center ring (401), and one end of the plurality of bracket ribs (402) away from the bracket center ring (401) is connected to the air duct volute (1).

3. The fan assembly according to claim 2, wherein: The number of the support ribs (402) is 3 or 4.

4. The fan assembly according to claim 2, wherein: The air duct volute (1) is provided with a plurality of first support plates (6) close to the motor bracket (4).

5. The fan assembly according to claim 4, wherein: A second support plate (10) is provided on the motor support (4), and the center distance between the second support plate (10) and the support center ring (401) is 35 to 45 mm.

6. The fan assembly according to claim 1, wherein: The motor bracket (4) has a central installation position, and the central installation position has an installation angle relative to the circumference of the first air inlet (301), and the angle adjustment range of the installation angle is -30° to 30°.

7. The fan assembly according to claim 1, wherein: The air duct volute (1) is arranged vertically, and the motor bracket (4) and the air duct volute (1) have an air duct angle θ in a vertical direction, and the air duct angle θ satisfies: -5°≤θ≤15°.

8. The fan assembly according to claim 1, wherein: The air duct volute (1) comprises a fan blade installation cavity and a plurality of air outlet ducts connected to the fan blade installation cavity.

9. The fan assembly according to claim 8, wherein: The plurality of air outlet ducts include a first air outlet duct (701) and a second air outlet duct (702), and the air outlets of the first air outlet duct (701) and the second air outlet duct (702) are oriented in opposite directions.

10. The fan assembly according to any one of claims 1 to 9, wherein: The air duct volute (1) comprises a volute body (101) and a volute cover (102) which are interlocked and connected, the volute body (101) is provided with the first air inlet (301), and the volute cover (102) is provided with the second air inlet (302).

11. An air conditioner, comprising a heat exchanger (8), a third air inlet (303), and the fan assembly according to any one of claims 1 to 10, wherein the third air inlet (303) faces the heat exchanger (8).

12. An air conditioning system, comprising an air conditioner, wherein the air conditioner is the air conditioner according to claim 11.

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