Fan assembly, air conditioner and air conditioning system

Abstract

A fan assembly, an air conditioner and an air conditioning system. The fan assembly includes an air duct volute (1), a motor bracket (4), and a double-suction centrifugal fan blades (2) disposed 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 air suction ports of the double-suction centrifugal fan blade; the motor bracket is disposed in the first air inlet and is connected with a motor of the double-suction centrifugal fan blades (2), and an air inflow area ratio of an air inflow area S1 of the first air inlet (301) to an air inflow area S2 of the second air inlet (302) meets: 0.55≤formula(1)≤0.8. By setting the air inflow areas of both sides of the air duct volute reasonably, a pressure difference generated in an air duct can be reduced, and the mutual impact of airflows is reduced, thereby increasing the air volume of a fan system.

Description

[0001] The present invention claims the priority of Chinese Patent Application 202311096380.9, filed in the China Patent Office on August 28, 2023, and entitled "Fan Assembly, Air Conditioner and Air Conditioning System", the entire contents of which are herein incorporated by reference.Technical Field

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

[0003] Distributed air supply-type air conditioners have gained high recognition in the air conditioning market for their unique air outflow modes, the distributed air supply-type air conditioners include a shower-style cooling mode with an upward discharge manner and a carpet-style heating mode with an downward discharge manner. However, due to the relatively high cost and a certain degree of immaturity of the upward and downward discharge technology, the market share is relatively low, therefore, it is urgent to tackle key problems of the cost reduction technology of distributed air supply-type platforms, so as to reduce the cost of the overall machine and achieve breakthroughs in related technical bottlenecks. Double-suction centrifugal fans have the characteristics of relatively large flow coefficients and good noise quality, so that the double-suction centrifugal fan can be used in the distributed air supply-type air conditioners, so as to improve the air supply volumes of the fans, reduce the noise of the fan systems and achieve the targets of cost reduction and efficiency improvement.

[0004] Based on the distributed air supply technology, a brand new double-suction bidirectional single-stage centrifugal fan system is established, in which a volute air duct component is vertically disposed, and the double-suction single-centrifugal fan blade is laterally installed inside the volute air duct, thereby realizing air inflow on the rear side, air suction on both sides and upward and downward distributed air supply, thus improving the comfort of air supply and the performance of the single-stage centrifugal fan system, and reducing the cost of the distributed air supply technology. However, to implement the air inflow on the both sides and the upward and downward air supply of the air duct of a single-stage centrifugal double-suction fan, fan blades and a motor need to be installed in an air duct volute, and thus it is necessary to design a motor bracket structure. The motor bracket structure is designed at an air inlet of the air duct volute, therefore the design of the motor bracket structure is particularly important for the design of the air duct, the performance of the air conditioner, the noise sound quality, etc. Since a double-suction bidirectional fan employs air inflow on both sides, the uneven air inflow of the fan blades may lead to a disordered flow field, such that airflows impact each other after the airflows of the air inlets on the both sides converge inside the air duct, thereby not only reducing the air volume of the fan system, but also easily exciting aerodynamic noise, thus affecting the user experience.Summary

[0005] Some embodiments of the present invention provide a fan assembly, an air conditioner, and an air conditioning system. By reasonably setting the air inflow areas on both sides of an air duct volute, a pressure difference generated in an air duct can be reduced, and the mutual impact of airflows is reduced, thereby increasing the air volume of the fan system.

[0006] Some embodiments of the present invention provide a fan assembly, an air conditioner, and an air conditioning system. The fan assembly includes 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 air suction ports of the double-suction centrifugal fan blade; the motor bracket is disposed in the first air inlet and is connected with a motor of the double-suction centrifugal fan blade, and an air inflow area ratio of an air inflow area S1 of the first air inlet to an air inflow area S2 of the second air inlet meets: 0.55 ≤ S 1 S 2 ≤ 0.8.

[0007] In some embodiments, the motor bracket includes a bracket center ring and a plurality of bracket ribs disposed in an array along the bracket center ring, and ends of the plurality of bracket ribs away from the bracket center ring are connected with the air duct volute.

[0008] In some embodiments, a number of bracket is 3 or 4 .

[0009] In some embodiments, the air duct volute is provided with a plurality of first support plates close to the motor bracket.

[0010] In some embodiments, the motor bracket is provided with a second support plate, and a center distance between the second support plate and the bracket center ring is 35-45 mm.

[0011] In some embodiments, the motor bracket has a central installation position, the central installation position has an installation angle relative to a circumferential direction of the first air inlet, and an angle adjustment range of the installation angle is -30° to 30°.

[0012] In some embodiments, the air duct volute is vertically disposed, the motor bracket and a vertical direction have an air duct angle θ, and the air duct angle θ meets: -5°≤θ≤15°.

[0013] In some embodiments, the air duct volute is provided with a fan blade installation cavity and a plurality of air outflow ducts in communication with the fan blade installation cavity.

[0014] In some embodiments, the plurality of air outflow ducts include a first air outflow duct and a second air outflow duct, and an orientation of an air outlet of the first air outflow duct is opposite to an orientation of an air outlet of the second air outflow duct.

[0015] In some embodiments, the air duct volute includes a volute body and a volute cover body, which are connected with each other in a snap-fit manner, the volute body is provided the first air inlet, and the volute cover body is provided with the second air inlet.

[0016] An air conditioner, including a heat exchanger, a third air inlet, and the above fan assembly, the third air inlet faces the heat exchanger.

[0017] An air conditioning system, including an air conditioner, the air conditioner is the air conditioner described above.

[0018] The fan assembly, the air conditioner and the air conditioning system provided in the present invention have the following beneficial effects: The motor bracket is disposed in the first air inlet, the motor bracket is configured to support and fasten the motor, and during the rotation of the double-suction centrifugal fan blade, the first air inlet and the second air inlet respectively intake the air, so as to generate airflows in the air duct volute. Under the consideration that if the motor bracket is disposed in the first air inlet, the air input amount and the flow velocity of the first air inlet are affected, when the air inflow area ratio of the air inflow area S1 of the first air inlet to the air inflow area S2 of the second air inlet meets: 0.55 ≤ S 1 S 2 ≤ 0.8, in the range of this area ratio, the difference between the flow velocity is relatively small, thereby improving the uniformity of air inflow flow fields on both sides of the air duct volute, so that the pressure difference between the airflows is small after the airflows on the both sides converge in the air duct volute, and the impact force between the airflows is also reduced, thereby being able to not only improve the air volume of the fan system, but also maintain the balance of axial forces on the both sides of the air duct volute.Brief Description of the Drawings

[0019] To illustrate technical solutions in the embodiments of the present invention or in the related art more clearly, a brief introduction on the drawings which are needed in the description of the embodiments or the related art is given below. Apparently, the drawings in the description below are merely exemplary, and for those ordinary skilled in the art, other implementation drawings may also be obtained according to the provided drawings without creative efforts.

[0020] The structures, proportions, sizes and the like shown in the present specification are only used to cooperate with the content disclosed in the specification, so as to be understood and read by those skilled who are familiar with this art, and are not intended to limit limiting conditions that may be implemented by the present invention, thereby having no technical substantive meaning. Any modifications in structures, changes in proportional relationships, or adjustment in sizes shall all fall within the scope of the technical content disclosed in the present invention without affecting the effects and objectives that may be achieved in the present invention. Fig. 1 is a schematic structural diagram of a fan assembly according to some embodiments of the present invention; Fig. 2 is an exploded view of a fan assembly according to some embodiments of the present invention; Fig. 3 is a schematic structural diagram of a volute body according to some embodiments of the present invention; Fig. 4 is a schematic structural diagram of a volute cover body according to some embodiments of the present invention; Fig. 5 is a comparison diagram of pressure distributions under different angles of a motor bracket according to some embodiments of the present invention; Fig. 6 is a cloud diagram of pressure distributions at a volute tongue under different angles of a motor bracket according to some embodiments of the present invention; Fig. 7 is a comparison diagram of flow velocity distributions of air inflow airflows on both sides according to some embodiments of the present invention; Fig. 8 is an enlarged view at a location A in Fig. 1; Fig. 9 is a schematic structural diagram of a distribution of support plates according to some embodiments of the present invention; Fig. 10 is a schematic structural diagram of an air duct angle according to some embodiments of the present invention; Fig. 11 is a comparison cloud diagram of an air velocity distribution of a heat exchanger according to some embodiments of the present invention; Fig. 12 is a schematic structural diagram of an air conditioner according to some embodiments of the present invention The reference signs are expressed as: 1-air duct volute; 101-volute body; 102-volute cover body; 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 outflow duct; 702-second air outflow duct; 8-heat exchanger; 9-flow guide ring; 10-second support plate. Detailed Description of the Embodiments

[0021] A clear and complete description of technical solutions in the embodiments of the present invention will be given below, in combination with the drawings in the embodiments of the present invention. Apparently, the embodiments described below are merely a part, but not all, of the embodiments of the present invention. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention and its invention or usage. All of other embodiments, obtained by those ordinary skilled in the art based on the embodiments in the present invention without any creative effort, fall into the protection scope of the present invention.

[0022] It should be noted that, terms used herein are for the purpose of describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly dictates otherwise, a singular form is intended to include a plural form as well. In addition, it should also be understood that, when the terms "contain" and / or "include" are used in the present specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0023] It should be understood that, the term "and / or" used herein is merely an association relationship describing associated objects, and indicates that there may be three relationships, for example, A and / or B may indicate that A exists alone, both A and B exist, and B exists alone. In addition, the character " / " herein generally indicates an "or" relationship between the front and back associated objects.

[0024] Unless specifically stated otherwise, relative arrangements, numerical expressions and numerical values of components and steps set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that, for the convenience of description, the dimensions of various portions shown in the drawings are not drawn according to an actual proportional relationship. Techniques, methods and devices known to those ordinary skilled in the related art may not be discussed in detail, but where appropriate, such techniques, methods and devices should be considered as a part of the authorized specification. In all examples shown and discussed herein, any specific value should be construed as illustrative only and not as restrictive. Accordingly, other examples of the exemplary embodiments may have different values. It should be noted that similar reference signs and letters refer to similar items in the following figures, so once a certain item is defined in one figure, it does not require further discussion in subsequent figures.

[0025] In the description of the present invention, it should be understood that orientation or position relationships indicated by orientation words such as "front, back, upper, lower, left, right" "lateral, longitudinal, vertical, horizontal"and "top, bottom" and the like are generally orientation or position relationships shown on the basis of the drawings, and are merely for the convenience of describing the present invention and simplifying the description, in the absence of opposite statements, these orientation words do not indicate or imply that the referred apparatuses or elements must have specific orientations or must be constructed and operated in specific orientations, and thus cannot be construed as limiting the protection scope of the present invention; and the orientation words "inside and outside" refer to the inside and outside of the contours of the components themselves.

[0026] For the convenience of description, spatially relative terms, such as "on", "above", "on the upper surface", "over" and the like, may be used herein to describe spatial position relationships between one device or feature and other devices or features shown in the figures. It should be understood that, the spatially relative terms are intended to contain different orientations of a device in use or operation in addition to the orientations described in the figures. For example, if the device in the figures is turned over, the device described as "above other devices or structures" or "over other devices or structures" would then be positioned as "below other devices or structures" or "beneath other devices or structures". Thus, the exemplary term "above" may include both orientations of "above" and "below". The device may also be otherwise positioned (rotated by 90 degrees or at other orientations), and the spatially relative descriptions used herein are interpreted accordingly.

[0027] In addition, it should be noted that the terms "first", "second" and the like are used for defining components and parts, and are merely for the convenience of distinguishing the corresponding components and parts, and unless otherwise stated, the above words have no special meaning, and thus cannot be construed as limiting the protection scope of the present invention.

[0028] As shown in Fig. 1 and Fig. 2, according to some embodiments of the present invention, a fan assembly is provided, including an air duct volute 1, a motor bracket 4, and a double-suction centrifugal fan blade 2 disposed 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 air suction ports of the double-suction centrifugal fan blade 2; the motor bracket 4 is disposed in the first air inlet 301 and is connected with a motor 5 of the double-suction centrifugal fan blade 2; and an air inflow area ratio of an air inflow area S1 of the first air inlet 301 to an air inflow area S2 of the second air inlet 302 meets: 0.55 ≤ S 1 S 2 ≤ 0.8.

[0029] In the present embodiment, the motor bracket 4 is disposed in the first air inlet 301, the motor bracket 4 is configured to support and fasten the motor 5, and during the rotation of the double-suction centrifugal fan blade 2, the first air inlet 301 and the second air inlet 302 intake the air respectively, so as to generate airflows in the air duct volute 1. Under the consideration that if the motor bracket 4 is disposed in the first air inlet 301, the air input amount and the flow velocity of the first air inlet 301 are affected, when the air inflow area ratio of the air inflow area S1 of the first air inlet 301 to the air inflow area S2 of the second air inlet 302 meets: 0.55 ≤ S 1 S 2 ≤ 0.8, in the range of this area ratio the differences between the flow velocities are smaller at the area ratios within this range, thereby improving the uniformity of air inflow flow fields on both sides of the air duct volute 1, so that the pressure difference between the airflows is small after the airflows on the both sides converge in the air duct volute 1, and the impact force between the airflows is also reduced, thereby being able to not only improve the air volume of the fan system, but also maintain the balance of axial forces on the both sides of the air duct volute 1. As shown in Fig. 7, when the area ratio is less than 0.55, the attenuation of the air volume is greater than 30 m 3< / h, and when the area ratio is greater than 0.8, the air inflow airflows on the both sides are disordered.

[0030] As shown in Fig. 3 and Fig. 4, the air duct volute 1 is provided with a fan blade installation cavity and a plurality of air outflow ducts in communication with the fan blade installation cavity, and the double-suction bidirectional centrifugal fan blade is laterally disposed in the fan blade installation cavity.

[0031] Specifically, the plurality of air outflow ducts include a first air outflow duct 701 and a second air outflow duct 702, and the orientation of an air outlet of the first air outflow duct 701 is opposite to the orientation of an air outlet of the second air outflow duct 702. In the present invention, the air duct volute 1 is vertically disposed, the first air outflow duct 701 is disposed above the second air outflow duct 702, the first air outflow duct 701 is provided with an upper air outlet, and the second air outflow duct 702 is provided with a lower air outlet, thereby realizing air inflow on both sides and upward and downward distributed air supply, so as to improve the comfort of the user. In other embodiments, on the premise of meeting usage requirements, the air outflow directions of the first air outflow duct 701 and the second air outflow duct 702 may be interchanged, the first air outflow duct 701 and the second air outflow duct 702 may also be disposed side by side to realize air outflow on the same side, or only the first air outflow duct 701 or the second air outflow duct 702 may be provided.

[0032] In the present embodiment, the air duct volute 1 includes a volute body 101 and a volute cover body 102, which are connected with each other in a snap-fit manner, the volute body 101 is provided with the first air inlet 301, and the volute cover body 102 is provided with the second air inlet 302.

[0033] Specifically, each of the volute body 101 and the volute cover body 102 includes a frame body and a flow guide ring 9, the first air inlet 301 is disposed at the flow guide ring 9 of the volute body 101, and the second air inlet 302 is disposed at the flow guide ring of the volute cover body 102. After the volute body 101 and the volute cover body 102 are connected with each other in the snap-fit manner, the first air outflow duct 701 is formed above the volute body 101 and the volute cover body 102, the second air outflow duct 702 is formed below the volute body 101 and the volute cover body 102, and the both ends of the volute body 101 and the volute cover body 102 are of asymmetric structures.

[0034] As shown in Fig. 3, the motor bracket 4 is of an inverted Y-shape, the motor bracket 4 includes a bracket center ring 401 and a plurality of bracket ribs 402 disposed in an array along a circumferential direction of the bracket center ring 401, and ends of the plurality of bracket ribs 402 away from the bracket center ring 401 are connected with the flow guide ring 9 of the volute body 101, and the motor bracket 4 may be integrally formed with the volute body 101 under the consideration of mold stripping and cost problems.

[0035] Specifically, a number of bracket ribs 402 is 3 or 4. By theoretically analyzing a flow field of an air duct of a double-suction bidirectional fan, and designing a reasonable area ratio of inlets on the both sides of the air duct of the fan, in the case where the strength of the entire air duct volute 1 is ensured, a number of bracket ribs 402 is 3 or 4, so that it can be ensured that the air duct volute 1 has certain strength, and the motor bracket 4 also meets the support strength requirement for the motor 5, thereby improving the uniformity of air inflow flow fields on the both sides, and improving the air volume of the double-suction single-stage centrifugal fan system. When the number of the bracket ribs 402 is less than 3, the cantilever beams of two bracket ribs 402 are too long, so that the strength is insufficient, and thus the bracket ribs 402 are prone to breakage; and if the number of the bracket ribs 402 is too large, the air inflow is hindered, resulting in a flow field disorder and exciting aerodynamic noise. Tests show that when there are four ribs, the air volume is reduced by about 20 m 3< / h compared with three ribs, which is within an acceptable range, but when the number of bracket ribs 402 is 5, the air volume is reduced by more than 50 m 3< / h, so that the air volume loss is serious.

[0036] As shown in Fig. 5, the motor bracket 4 has a central installation position, the central installation position has an installation angle with respect to the circumferential direction of the first air inlet 301, and the angle adjustment range of the installation angle is -30° to 30°.

[0037] Specifically, when there are three bracket ribs 402, the angle between any two of the bracket ribs 402 is 120°, wherein with one bracket rib 402 as a reference, the installation angle shown in Fig. 5(b) is 0°, and the bracket ribs 402 is located at the central installation position, ; when the the bracket rib 402 rotates clockwise, the installation angle shown in Fig. 5(c) is 30°,and the installation angle shown in Fig. 5(d) is 60°, ; and when bracket ribs 402 rotates counterclockwise, the installation angle shown in Fig. 5(a) is -30°, .

[0038] In the present embodiment, when the bracket ribs 402 are disposed at different positions, different impacts are generated on the air volume and the air inflow flow velocity of the first air inlet 301, and noise of different degrees is also excited at the volute tongue of the air duct volute 1. When the angle adjustment range of the installation angle is -30° to 30°, as shown in Fig. 5, the darker the color distribution in the figure is, the greater the difference value between pressure differences is; as shown in Fig. 6(a), the installation angle is 60° at this time, the whiter the volute tongue is, the greater the pressure is, the color is more mottled, there are double excitation sources at the volute tongue when the installation angle is 60°, and a high-pressure excitation source at the volute tongue excites rotation noise; and as shown in Fig. 6(c), the installation angle is 0° at this time, the vibration source disappears, so there is no sudden change in the sound pressure, and thus the rotation noise can be effectively eliminated.

[0039] In the present embodiment, when the installation angle ranges from -30° to 30°, the pressure distribution uniformity is higher than that when the installation angle is 60°, so that the first air inlet 301 avoids a low-pressure area during air inflow, therefore the airflow impact can be reduced, the noise generated by a high-velocity airflow in the low-pressure area impacting the motor bracket 4 is avoided, and the rotation noise excited by a high-pressure gradient at the volute tongue is effectively eliminated. Tests show that the peak value of the rotation noise is reduced from 32.2 db to 25.8 db, so that the overall sound quality of the fan system is better, and the user experience is improved.

[0040] As shown in Fig. 3 and Fig. 7, the diameter D of the first air inlet 301 and the diameter D of the second air inlet 302 meet 200≤D≤250, a fan blade diameter of the double-suction single-stagecentrifugal fan blade is 220-300 mm, and the parameters of the air inflow area S1 of the first air inlet 301 and the air inflow area S2 of the second air inlet 302 are designed as follows: the air inflow area S1 of the first air inlet 301 meets: S 1 = π D 2 − d 2 4 − 3 ab; the air inflow area S2 of the second air inlet 302 meets: S 2 = πD 2 4 ; the air inflow area ratio meets: S 1 S 2 = π D 2 − d 2 − 12 ab πD 2 ; the air inflow area ratio range meets: 0.55 ≤ S 1 S 2 ≤ 0.8, wherein "a" is the width of bracket rib 402, "b" is the length of bracket rib 402, and "d" is the diameter of the bracket center ring 401. The air inflow area of the first air inlet 301 and the diameter of the center of the bracket are related to the length and the width of the bracket rib 402, specifically, under the consideration of actual industrial applications, the diameter of the flow guide ring 9 of the volute body 101 adapts to the bracket rib 402, when the air inflow area of the first air inlet 301 is too large, that is, the greater the diameter of the flow guide ring 9 of the volute body 101 is, the smaller the shielding of the first air inlet 301 by the flow guide ring 9 of the volute body 101 is, and in order to meet the air inflow requirement, the length of the bracket rib 402 is greater, and the width and the thickness of the bracket rib 402 are both reduced, such that the support strength of the motor bracket 4 cannot meet the usage requirement; and when the air inflow area of the first air inlet 301 is too small, the air inflow volume requirement cannot be met. When the air inflow area ratio of the air inflow area S1 of the first air inlet 301 to the air inflow area S2 of the second air inlet 302 meets: 0.55 ≤ S 1 S 2 ≤ 0.8, the first air inlet 301 may meet the air inflow volume requirement, and the motor bracket 4 also has certain support strength.

[0041] As shown in Fig. 8 and Fig. 9, the air duct volute 1 is provided with a plurality of first support plates 6close to the motor bracket 4, the motor bracket 4 is provided with a second support plate 10. The first support plates 6 and the second support plate 10 is connected with the air duct volute 1 by bolts.

[0042] In the present embodiment, four first support plates 6 and one second support plate 10 are provided, a center distance e between the second support plate 10 and the bracket center ring 401 ranges from 35mm to 45 mm, and the volute body 101 and the volute cover body 102 are respectively provided with two first support plates 6. The first support plates 6 and the second support plate 10 are made of a titanium alloy, and by providing the second support plate 10, a surge phenomenon of the fan caused by the breakage at the joint of the bracket rib 402 and the volute body 101 during transportation may be prevented. It is worth noting that, for the second support plate 10 disposed on the motor bracket 4, when the center distance between the second support plate 10 and the bracket center ring 401 is less than 35 mm, no reinforcement effect is achieved on the joint; and when is greater than 45 mm, the air inflow of the first air inlet 301 is affected, resulting in the surge phenomenon of the fan.

[0043] As shown in Fig. 10, the air duct volute 1 is vertically disposed,and the air duct angle θ meets: -5°≤θ≤15°. As shown in Fig. 11, when the air duct angle is within the defined range, that is, the color distribution of the cloud diagram of air velocity distribution after improvement is uniform; and when the air duct angle is not within the defined range, that is, the color display of the cloud diagram of the air velocity distribution before improvement is more mottled, the air velocity is unstable, and it is easy to generate a pressure difference. When the air duct angle is greater than 15°, the air duct volute 1 is too close to the double-suction centrifugal fan blade 2, and in the case of a high rotation velocity of the fan, the outflow direction is limited, resulting in back flow of the airflows, thereby leading to an airflow loss, reducing the performance of the fan, and exciting the fan system to generate aerodynamic noise. When the air duct angle is less than -5°, the overall air duct is too close to a heat exchanger 8, which affects the air velocity distribution on the surface of the heat exchanger 8, thereby affecting the heat exchange performance of the heat exchanger 8, and a copper pipe is collided during transportation, so that there is a potential safety hazard.

[0044] With reference to Fig. 12, an air conditioner, including the heat exchanger 8, a third air inlet 303, and the above fan assembly, the third air inlet 303 faces the heat exchanger 8. The double-suction centrifugal fan blade 2 is disposed in the air duct volute 1, so that the third air inlet 303 can intake the air, and the first air inlet 301 and the second air inlet 302 suck the air, thereby realizing upward and downward distributed air supply, thus improving the air supply comfort and the performance of the single-stage centrifugal fan system, and reducing the cost of the distributed air supply technology.

[0045] An air conditioning system, including an air conditioner, the air conditioner is the air conditioner described above.

[0046] It will be readily understood by those skilled in the art that the above advantageous modes may be freely combined and superimposed on the premise of no conflict.

[0047] The above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, and the like, made within the spirit and principles of the present invention, shall fall within the protection scope of the present invention. The above descriptions are only preferred implementations of the present invention, and it should be noted that for those ordinary skilled in the art, several improvements and modifications may also be made without departing from the technical principles of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A fan assembly, comprising an air duct volute (1), a motor bracket (4), and a double-suction centrifugal fan blade(2) disposed in the air duct volute (1); wherein the air duct volute (1) is provided with a first air inlet (301) and a second air inlet (302) corresponding to air suction ports of the double-suction centrifugal fan blade (2); the motor bracket (4) is disposed in the first air inlet (301) and is connected with a motor (5) of the double-suction centrifugal fan blade (2); wherein an air inflow area ratio of an air inflow area S1 of the first air inlet (301) to an air inflow area S2 of the second air inlet (302) meets: 0.55 ≤ S 1 S 2 ≤ 0.8.

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) disposed in an array along the bracket center ring (401), and ends of the plurality of bracket ribs (402) away from the bracket center ring (401) are connected with the air duct volute (1).

3. The fan assembly according to claim 2, wherein a number of bracket 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.

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

6. The fan assembly according to claim 1, wherein the motor bracket (4) has a central installation position, the central installation position has an installation angle relative to a circumferential direction of the first air inlet (301), and an 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 vertically disposed, the motor bracket (4) and a vertical direction have an air duct angle θ, and the air duct angle θ meets: -5°≤θ≤15°.

8. The fan assembly according to claim 1, wherein the air duct volute (1) is provided with a fan blade installation cavity and a plurality of air outflow ducts in communication with the fan blade installation cavity.

9. The fan assembly according to claim 8, wherein the plurality of air outflow ducts comprise a first air outflow duct (701) and a second air outflow duct (702), and an orientation of an air outlet of the first air outflow duct (701) is opposite to an orientation of an air outlet of the second air outflow duct (702).

10. The fan assembly according to any of claims 1 to 9, wherein the air duct volute (1) comprises a volute body (101) and a volute cover body (102), which are connected with each other in a snap-fit manner, the volute body (101) is provided with the first air inlet (301), and the volute cover body (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 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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