Installation structure of cross-flow wind wheel, cross-flow wind wheel and air duct assembly

Abstract

The embodiment of the utility model provides an installation structure of a cross-flow wind wheel, the cross-flow wind wheel and an air duct assembly, and relates to the technical field of cross-flow wind wheel installation. The mounting structure of the cross-flow wind wheel comprises a shell and a bearing sleeve, wherein the shell is provided with a mounting cavity, and an opening is formed in one side of the shell; a positioning structure is arranged on the side, close to the opening, of the shell and used for being positioned with the fixing plate so that the shell can be fixedly connected with the fixing plate. The bearing sleeve is arranged in the mounting cavity and used for fixing the bearing so as to be fixedly connected with an impeller of the cross-flow wind wheel through the bearing. By arranging the positioning structure on the shell, the mounting position of the shell can be quickly positioned when the shell is connected with the fixing plate, so that the shell can be quickly connected and fixed, and the mounting is convenient. The bearing sleeve is arranged in the shell, the impeller is installed and fixed through the bearing sleeve, the concentricity of the two ends of the impeller of the cross-flow wind wheel can be improved, the problem of eccentricity of the two ends of the impeller during operation of the cross-flow wind wheel is solved, and therefore the damage rate of the cross-flow wind wheel is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of crossflow wind wheel installation, and in particular to a crossflow wind wheel installation structure, a crossflow wind wheel and an air duct component. Background Art

[0002] Crossflow impellers are widely used in air conditioners, various fans, and heat pumps due to their advantages, such as smooth airflow, high dynamic pressure coefficient, and long reach. Crossflow impellers typically use a multi-bladed forward-facing blade profile with closed ends. This design allows for unlimited impeller width, and as the width increases, the flow rate also increases. Crossflow impellers utilize long, bucket-shaped impellers. The large, barrel-shaped blades maintain the overall air circulation volume while selecting a lower speed ratio, effectively reducing the noise generated by high-speed operation. In addition, the impeller undergoes rotor dynamic balancing to ensure stable operation, reduce noise, and extend service life.

[0003] However, currently, most heat pumps use injection molded parts to securely mount the crossflow impeller. Because the wall thickness of the injection molded parts cannot be made too thick and the structure requires reinforcement ribs to increase product stability, the design structure is complex and the mold cost is high. Utility Model Content

[0004] The utility model provides a mounting structure for a crossflow impeller, a crossflow impeller, and an air duct assembly. These structures can be manufactured without injection molding, have a simple structure, and reduce costs. Furthermore, the mounting structure allows for convenient and quick installation of the crossflow impeller, improves the concentricity of the impeller ends, and thus reduces damage to the crossflow impeller caused by eccentricity.

[0005] The embodiment of the present utility model can be implemented as follows:

[0006] An embodiment of the present invention provides a mounting structure for a crossflow impeller, comprising:

[0007] A housing having a mounting cavity and an opening on one side; a positioning structure is provided on a side of the housing close to the opening, the positioning structure being used to position the housing with a fixing plate so that the housing is connected and fixed to the fixing plate;

[0008] A bearing sleeve is arranged in the installation cavity, and the bearing sleeve is used to fix the bearing so as to be connected and fixed with the impeller of the crossflow impeller through the bearing.

[0009] In an optional embodiment, an annular wall is provided in the installation cavity, a bearing sleeve installation groove is provided in the annular wall, the bearing sleeve is provided in the bearing sleeve installation groove and abuts against the inner wall of the annular wall.

[0010] In an optional embodiment, a bearing mounting groove is provided in the bearing sleeve, and the bearing mounting groove is used to install a fixed bearing; the bearing sleeve also has a shaft hole along the axial direction of the bearing mounting groove, and the shaft hole is connected to the bearing mounting groove.

[0011] In an optional embodiment, the outer surface of the bearing sleeve is provided with a plurality of protrusions, and the plurality of protrusions are arranged at intervals along the circumference of the axis of the bearing mounting groove; and the plurality of protrusions are all used to abut against the mounting cavity.

[0012] In an optional embodiment, the shell includes a shell body and a connecting portion, the shell body has a mounting cavity and is open on one side; the connecting portion is arranged at one end of the opening of the shell body; the connecting portion is provided with a first mounting hole, and the connecting portion is threadedly connected to the fixing plate through the first mounting hole.

[0013] In an optional embodiment, the installation structure of the crossflow impeller further includes a bearing, the bearing is located in the bearing sleeve, and the bearing is used to cooperate with and be fixed to the impeller.

[0014] In an optional embodiment, the bearing sleeve is a rubber bearing sleeve.

[0015] An embodiment of the present utility model also provides a cross-flow wind wheel, including an impeller, a fixed plate and the mounting structure of the cross-flow wind wheel described in any of the above embodiments, the fixed plate is provided with a positioning hole, the positioning hole cooperates with the positioning structure, and the shell is connected to the fixed plate; the impeller is connected to the bearing through a rotating shaft.

[0016] In an optional embodiment, the bearing sleeve includes a bearing sleeve body and a connecting column, and the bearing sleeve body is connected to the connecting column; the fixing plate is provided with a second mounting hole, and the connecting column is passed through the second mounting hole, and the connecting column is used to connect to an external structure.

[0017] An embodiment of the present invention further provides an air duct assembly, comprising a motor and the crossflow impeller described in any of the above embodiments, wherein the motor is connected to a side of the impeller away from the mounting structure of the crossflow impeller, and the motor is used to drive the impeller.

[0018] The beneficial effects of the installation structure of the crossflow impeller, the crossflow impeller, and the air duct assembly of the embodiment of the utility model include:

[0019] The installation structure of the crossflow fan includes a housing and a bearing sleeve. The housing has a mounting cavity and an opening on one side. A positioning structure is provided on the side of the housing near the opening. The positioning structure is used to position the housing with a fixed plate so that the housing and the fixed plate can be connected and fixed. By providing a positioning structure on the housing, the installation position of the housing can be quickly located when the housing is connected to the fixed plate, so that the housing can be quickly connected and fixed, and the installation is convenient. The bearing sleeve is provided in the mounting cavity. The bearing sleeve is used to fix the bearing so as to connect and fix the impeller of the crossflow fan through the bearing. The bearing sleeve is provided in the housing and the impeller is fixed by the bearing sleeve. This can improve the concentricity of the two ends of the impeller of the crossflow fan to avoid the eccentricity problem of the impeller at both ends when the crossflow fan is in operation, thereby reducing the damage rate of the crossflow fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 A schematic diagram of an air duct assembly provided in an embodiment of the present utility model;

[0022] Figure 2 This is an exploded schematic diagram of the air duct assembly provided in an embodiment of the present utility model;

[0023] Figure 3 A schematic diagram of a first viewing angle of the installation structure of a crossflow impeller provided in an embodiment of the present utility model;

[0024] Figure 4 A schematic diagram of a second viewing angle of the installation structure of the crossflow impeller provided in an embodiment of the present utility model;

[0025] Figure 5 A schematic diagram of the AA section provided in an embodiment of the present utility model;

[0026] Figure 6 This is a schematic diagram of a bearing sleeve provided in an embodiment of the present utility model.

[0027] Icons: 1000-air duct assembly; 100-crossflow impeller; 110-mounting structure of crossflow impeller; 111-housing; 1111-housing body; 1112-connecting portion; 11121-first mounting hole; 112-bearing sleeve; 1121-bearing sleeve body; 1122-connecting column; 1123-bearing mounting groove; 1124-rotating shaft hole; 1125-protrusion; 113-mounting cavity; 114-opening; 115-positioning structure; 116-annular wall; 117-bearing sleeve mounting groove; 120-impeller; 130-fixing plate; 131-positioning hole; 132-second mounting hole; 200-motor. DETAILED DESCRIPTION

[0028] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are intended to fall within the scope of protection of the present invention.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0031] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when in use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0032] In addition, the terms "first", "second", etc., if used, are merely used to distinguish and describe, and should not be understood as indicating or implying relative importance.

[0033] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention can be combined with each other.

[0034] Crossflow impellers are widely used in air conditioners, various fans, and heat pumps due to their advantages, such as smooth airflow, high dynamic pressure coefficient, and long reach. Crossflow impellers typically feature multi-bladed, forward-facing blades with closed ends. This design allows for unlimited impeller width, and increasing the width also increases flow rate. Crossflow impellers utilize long, barrel-shaped impellers. The large barrel-shaped blades maintain overall air circulation while maintaining a low speed ratio, effectively reducing noise generated by high-speed operation. Furthermore, the impellers are dynamically balanced to ensure stable operation, reduce noise, and extend service life. However, currently, heat pumps mostly use injection molded components for mounting crossflow impellers. Existing molded components have both advantages and disadvantages. Their advantage is that they offer a variety of structural designs and a wide range of solutions for fixing, friction, and balancing the impeller. However, molded components are expensive, so injection molded parts cannot be made too thick. They also require reinforcing ribs and other structures to enhance product stability, resulting in complex designs.

[0035] Based on this, see Figure 1 and Figure 2 , and combined with Figure 3 The crossflow impeller mounting structure 110 provided in the embodiments of the present invention can effectively alleviate the aforementioned technical issues. This crossflow impeller mounting structure 110 can be manufactured without injection molding, resulting in a simple structure and reduced costs. Furthermore, this mounting structure facilitates quick and easy installation of the crossflow impeller 100, improving the concentricity of the impeller 120 at both ends of the crossflow impeller 100, thereby reducing damage to the crossflow impeller 100 caused by eccentricity.

[0036] Figure 1 A schematic diagram of an air duct assembly 1000 provided in an embodiment of the present utility model; Figure 2 This is an exploded schematic diagram of the air duct assembly 1000 provided in an embodiment of the present invention, as shown in FIG. Figure 1 and Figure 2 As shown, the air duct assembly 1000 in this embodiment includes a motor 200 and a crossflow rotor 100. The motor 200 is connected to the side of the impeller 120 away from the mounting structure 110 of the crossflow rotor, and the motor 200 is used to drive the impeller 120. The motor 200 is the power part of the crossflow rotor 100 and can be powered by AC or DC. AC power supply mainly includes shaded pole motors and capacitor motors, while DC power supply is a brushless DC motor. The motor 200 can also be replaced by a drive motor, which is generally flexibly mounted with the impeller 120 and fixed on the air duct. In addition, the air duct assembly 1000 may also include other devices such as a heat exchanger, which is determined according to actual usage and is not limited here. The heat exchanger and other devices are connected to the end of the crossflow rotor 100 away from the motor 200.

[0037] For quick and easy installation of the Crossflow Impeller 100, please continue to Figure 1 and Figure 2 The crossflow wind wheel 100 in this embodiment includes an impeller 120, a fixing plate 130 and a mounting structure 110 for the crossflow wind wheel. The fixing plate 130 is provided with a positioning hole 131, which cooperates with the positioning structure 115, and the housing 111 is connected to the fixing plate 130; the impeller 120 is connected to the bearing through a rotating shaft. Specifically, the housing 111 and the fixing plate 130 are connected by screws and other threaded fasteners. By providing a positioning structure 115 on the housing 111 and correspondingly providing a positioning hole 131 on the fixing plate 130, the installation position of the housing 111 can be quickly located through the cooperation of the positioning structure 115 and the positioning hole 131. In addition, the positioning structure 115 can also be snapped into the positioning hole 131, so that the connection between the housing 111 and the fixing plate 130 can reduce the number of screws and other threaded fasteners, and the connection can be firm.

[0038] See also Figure 1 To further simplify the installation process of the crossflow impeller 100, the bearing sleeve 112 in this embodiment includes a bearing sleeve body 1121 and a connecting post 1122. The bearing sleeve body 1121 is connected to the connecting post 1122. The fixing plate 130 defines a second mounting hole 132, through which the connecting post 1122 passes. The connecting post 1122 is used to connect to an external structure. In addition to being fixed to the fixing plate 130, the external structure can also be connected to the crossflow impeller's mounting structure 110 via the connecting post 1122, thereby enhancing the installation stability.

[0039] The specific structure of the installation structure 110 of the crossflow impeller is described in detail below.

[0040] Figure 3 This is a schematic diagram of a first perspective of a mounting structure 110 of a crossflow impeller provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of a second viewing angle of the installation structure 110 of the crossflow impeller provided in an embodiment of the present invention, as shown in FIG. Figure 3 and Figure 4As shown, the mounting structure 110 of the crossflow impeller in this embodiment includes a housing 111 and a bearing sleeve 112. The housing 111 has a mounting cavity 113 and is provided with an opening 114 on one side. A positioning structure 115 is provided on the side of the housing 111 close to the opening 114. The positioning structure 115 is used to position the fixed plate 130 so that the housing 111 and the fixed plate 130 are connected and fixed. The bearing sleeve 112 is provided in the mounting cavity 113. The bearing sleeve 112 is used to fix the bearing so as to be connected and fixed to the impeller 120 of the crossflow impeller 100 through the bearing. Specifically, the housing 111 in this embodiment is a sheet metal part. Sheet metal parts can be manufactured and processed without mold opening, and the strength of the sheet metal is relatively high. There is no need to set a reinforcement structure, and its structure is simple. Sheet metal processing is simple, the cost is relatively low, and the sheet metal processing time is short, which is also convenient for maintenance.

[0041] The positioning structure 115 provided on the housing 111 facilitates quick positioning of the housing 111 when connecting it to the fixing plate 130, allowing for quick connection and convenient installation. The bearing sleeve 112 provided within the housing 111 and the fixed impeller 120 mounted therethrough improve the concentricity of the impeller 120 at both ends of the crossflow impeller 100, thereby preventing eccentricity of the impeller 120 at both ends during operation and reducing the risk of damage to the crossflow impeller 100.

[0042] In addition, the bearing sleeve 112 may also be designed to have a structure similar to a bearing seat, that is, there is no need to dispose a bearing in the bearing sleeve 112 , and the bearing sleeve 112 itself can be used to mount the fixed impeller 120 .

[0043] Please continue reading Figure 3 Regarding the aforementioned "bearing sleeve 112 disposed in mounting cavity 113," specifically, in this embodiment, mounting cavity 113 is provided with an annular wall 116, within which is a bearing sleeve mounting groove 117. Bearing sleeve 112 is disposed within bearing sleeve mounting groove 117 and abuts against the inner wall of annular wall 116. The rest of housing 111 is formed from sheet metal, and then annular wall 116 is welded to mounting cavity 113, firmly connecting it to the rest of housing 111. Bearing sleeve 112 and the inner wall of annular wall 116 are interference fit.

[0044] In order to further improve the concentricity of the two ends of the impeller 120 of the crossflow impeller 100, the bearing sleeve 112 in this embodiment is a rubber bearing sleeve 112, which provides a flexible fit for the impeller 120. The use of the rubber bearing sleeve 112 can firstly effectively buffer and reduce vibration, which is crucial for protecting the drive shaft and other components from wear. Secondly, the rubber bearing sleeve 112 can also provide good support, especially in the case of a long drive shaft, and can prevent deviation caused by vibration, thereby reducing vehicle body vibration and noise inside the vehicle. In addition, the rubber bearing sleeve 112 can also enhance the stability of the equipment, especially under high load and high-speed operation, and can provide better load-bearing capacity. Finally, the rubber bearing sleeve 112 is also corrosion-resistant and wear-resistant, and can operate stably for a long time in harsh environments.

[0045] The above mentioned “shell 111 is connected and fixed to fixing plate 130”, please refer to Figure 3 and Figure 4 The shell 111 in this embodiment includes a shell body 1111 and a connecting portion 1112. The shell body 1111 has a mounting cavity 113 and an opening 114 on one side. The connecting portion 1112 is arranged at one end of the opening 114 of the shell body 1111. The connecting portion 1112 is provided with a first mounting hole 11121, and the connecting portion 1112 is threadedly connected to the fixing plate 130 through the first mounting hole 11121. Specifically, the shell 111 in this embodiment is a hollow rectangular parallelepiped, formed by a top surface and four side surfaces. Positioning structures 115 are provided on two opposite side surfaces of the shell 111, and connecting portions 1112 are provided on the other two side surfaces of the shell 111. A first mounting hole 11121 is provided on the connecting portion 1112, and the connecting portion 1112 is threadedly connected to the fixing plate 130 through the first mounting hole 11121. The threaded connection here can be a connection with threaded fasteners such as screws and bolts. Of course, two, three or more first mounting holes 11121 may also be provided on the connecting portion 1112 , depending on the actual installation situation and is not limited here.

[0046] To facilitate installation, positioning structure 115 is a ridge parallel to the side surface. Once positioning structure 115 engages with positioning hole 131 of fixing plate 130, positioning structure 115 can be bent and snapped into place with fixing plate 130. This reduces the need for screws and other components, allowing for quick installation and removal. Of course, positioning structure 115 can also be designed as a positioning snap-fit structure of other shapes, which is not limited here.

[0047] Figure 5 This is a schematic diagram of the AA section provided in an embodiment of the present utility model. Figure 6 This is a schematic diagram of the bearing sleeve 112 provided in the embodiment of the present invention, please refer to Figure 5 and Figure 6 , and combined with Figure 3To improve the stability of the connection between the bearing sleeve 112 and the bearing mounting groove 1123, the outer surface of the bearing sleeve 112 in this embodiment is provided with a plurality of protrusions 1125. The plurality of protrusions 1125 are arranged at intervals along the circumference of the axis of the bearing mounting groove 1123. The plurality of protrusions 1125 are configured to abut against the mounting cavity 113. The plurality of protrusions 1125 are interference fit with the bearing mounting groove 1123.

[0048] Please continue reading Figure 5 and Figure 6 In order to solve the friction problem generated when the crossflow impeller 100 rotates, the installation structure 110 of the crossflow impeller in this embodiment also includes a bearing (not shown in the figure). The bearing is located in the bearing sleeve 112, and the bearing is used to cooperate with the impeller 120 for fixation. The bearing structure embedded in the bearing sleeve 112 can reduce the friction when the crossflow impeller 100 is running and rotating, improve the safety and stability of the product, and also reduce noise. Specifically, a bearing mounting groove 1123 is provided in the bearing sleeve 112, and the bearing mounting groove 1123 is used to install and fix the bearing; the bearing sleeve 112 also has a shaft hole 1124 along the axial direction of the bearing mounting groove 1123, and the shaft hole 1124 is connected to the bearing mounting groove 1123.

[0049] According to the installation structure 110 of a crossflow impeller provided in this embodiment, the installation process is as follows:

[0050] The bearing sleeve 112 is positioned within the mounting cavity 113 of the housing 111. A bearing is embedded within the bearing sleeve 112. The positioning structure 115 engages with the positioning hole 131 of the fixing plate 130. The housing 111 and fixing plate 130 are then fixedly connected using screws or other threaded fasteners. Finally, the impeller 120 is connected to the bearing within the bearing sleeve 112 via a rotating shaft. The impeller 120 is connected to other external structures via the crossflow impeller mounting structure 110. This crossflow impeller mounting structure 110 can be manufactured without injection molding, resulting in a simple structure and reduced costs.

[0051] In summary, the crossflow impeller mounting structure 110 includes a housing 111 and a bearing sleeve 112. The housing 111 has a mounting cavity 113 and an opening 114 on one side. A positioning structure 115 is provided on the side of the housing 111 near the opening 114. The positioning structure 115 is used to locate the fixed plate 130 so that the housing 111 and the fixed plate 130 are connected and fixed. The bearing sleeve 112 is disposed in the mounting cavity 113 and is used to fix the bearing so that it is connected and fixed to the impeller 120 of the crossflow impeller 100 via the bearing. The provision of the positioning structure 115 on the housing 111 facilitates the quick positioning of the housing 111 when connecting the housing 111 to the fixed plate 130, allowing for quick connection and fixation of the housing 111, and facilitating installation. A bearing sleeve 112 is provided in the housing 111, and the fixed impeller 120 is installed through the bearing sleeve 112, which can improve the concentricity of the two ends of the impeller 120 of the crossflow fan 100, thereby avoiding the eccentricity problem of the two ends of the impeller 120 when the crossflow fan 100 is in operation, thereby reducing the damage rate of the crossflow fan 100.

[0052] The above is only a specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any changes or replacements that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed in the present invention should be included in the protection scope of the present invention.

Claims

1. A mounting structure for a crossflow impeller, characterized in that: include: A housing (111), the housing (111) having a mounting cavity (113) and an opening (114) on one side; a positioning structure (115) is provided on a side of the housing (111) close to the opening (114), the positioning structure (115) being used to position with a fixing plate (130) so that the housing (111) and the fixing plate (130) are connected and fixed; A bearing sleeve (112) is provided in the mounting cavity (113), and the bearing sleeve (112) is used to fix the bearing so as to be connected and fixed to the impeller (120) of the crossflow impeller (100) through the bearing.

2. The installation structure of the crossflow impeller according to claim 1, characterized in that: An annular wall (116) is provided in the installation cavity (113), a bearing sleeve installation groove (117) is provided in the annular wall (116), and the bearing sleeve (112) is provided in the bearing sleeve installation groove (117) and abuts against the inner wall of the annular wall (116).

3. The installation structure of the crossflow impeller according to claim 1, characterized in that: A bearing mounting groove (1123) is provided in the bearing sleeve (112), and the bearing mounting groove (1123) is used to install a fixed bearing; the bearing sleeve (112) is also provided with a rotating shaft hole (1124) along the axial direction of the bearing mounting groove (1123), and the rotating shaft hole (1124) is communicated with the bearing mounting groove (1123).

4. The installation structure of the crossflow impeller according to claim 3, characterized in that: The outer surface of the bearing sleeve (112) is provided with a plurality of protrusions (1125), and the plurality of protrusions (1125) are arranged at intervals along the circumference of the axis of the bearing mounting groove (1123); the plurality of protrusions (1125) are all used to abut against the mounting cavity (113).

5. The installation structure of the crossflow impeller according to claim 1, characterized in that: The shell (111) comprises a shell body (1111) and a connecting portion (1112); the shell body (1111) has the mounting cavity (113) and an opening (114) on one side; the connecting portion (1112) is arranged at one end of the opening (114) of the shell body (1111); the connecting portion (1112) is provided with a first mounting hole (11121), and the connecting portion (1112) is threadedly connected to the fixing plate (130) through the first mounting hole (11121).

6. The installation structure of the crossflow impeller according to claim 1, characterized in that: The installation structure (110) of the crossflow impeller further includes a bearing, the bearing being located in the bearing sleeve (112), and the bearing being used for being fixed in cooperation with the impeller (120).

7. The installation structure of the crossflow impeller according to claim 1, characterized in that: The bearing sleeve (112) is a rubber bearing sleeve (112).

8. A crossflow impeller, characterized in that: The invention comprises an impeller (120), a fixing plate (130) and a mounting structure (110) for a crossflow impeller according to any one of claims 1 to 7, wherein the fixing plate (130) is provided with a positioning hole (131), the positioning hole (131) cooperates with the positioning structure (115), and the housing (111) is connected to the fixing plate (130); the impeller (120) is connected to the bearing via a rotating shaft.

9. The crossflow impeller according to claim 8, characterized in that: The bearing sleeve (112) includes a bearing sleeve body (1121) and a connecting column (1122), and the bearing sleeve body (1121) is connected to the connecting column (1122); the fixing plate (130) is provided with a second mounting hole (132), and the connecting column (1122) is passed through the second mounting hole (132), and the connecting column (1122) is used to connect to an external structure.

10. An air duct assembly, characterized in that: The invention comprises a motor (200) and the crossflow fan (100) according to claim 8 or claim 9, wherein the motor (200) is connected to a side of the impeller (120) away from the mounting structure (110) of the crossflow fan, and the motor (200) is used to drive the impeller (120).

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