Impeller and crossflow fan

Abstract

This application provides an impeller and a crossflow fan. The crossflow fan includes an impeller, which comprises blades, an end cap, and a separator. Multiple blades are evenly distributed circumferentially, and the ends of the blades are connected to the end cap. A separator is provided on the inner side of the end cap, with a predetermined distance between the separator and the end cap. The separator, end cap, and blades together form a first airflow cavity, and the separator and blades together form a second airflow cavity. This application isolates the first airflow cavity, which is prone to vortex formation, through the separator, preventing the vortices in the first airflow cavity from affecting the airflow field of the second airflow cavity. This stabilizes the outlet air velocity at the position of the impeller corresponding to the second airflow cavity, ensuring that the air velocity at both ends of the crossflow fan is equal to or close to the middle air velocity, thereby making the crossflow fan provide uniform axial airflow.

Description

Technical Field

[0001] This application belongs to the field of crossflow fan technology, and more specifically, relates to an impeller and a crossflow fan. Background Technology

[0002] A crossflow fan is a type of fan in which airflow enters along one radial side of the impeller, passes through the interior of the impeller, and exits radially from the other side of the impeller. Due to the inherent structural characteristics of crossflow fans, the air velocity at both ends of the fan is lower than that in the middle, resulting in uneven axial airflow. Summary of the Invention

[0003] The purpose of this application is to provide an impeller and a crossflow fan to solve the technical problem of uneven airflow velocity in the crossflow fan in the prior art.

[0004] To achieve the above objectives, the technical solution adopted in this application is as follows: an impeller is provided, including blades, an end cap, and a separator. The number of blades is multiple, and each blade is evenly distributed along the circumference. The end of each blade is connected to the end cap. The separator is provided on the inner side of the end cap, and the separator is spaced at a predetermined distance from the end cap. The separator, the end cap, and each blade together form a first airflow cavity, and the separator and each blade together form a second airflow cavity.

[0005] In some embodiments, the outer periphery of the separator is formed with a plurality of slots, each blade is respectively engaged in the slots, and at least a portion of the blade extends out of the slots along the width direction.

[0006] In some embodiments, the thickness of the separator ranges from 1 mm to 2 mm.

[0007] In some embodiments, the end cap has an axially penetrating airflow hole that communicates with the first airflow chamber.

[0008] In some embodiments, the airflow hole extends circumferentially along the impeller; Alternatively, there may be multiple airflow holes, which are distributed at intervals along the circumference of the impeller.

[0009] In some embodiments, the impeller further includes a plurality of support rings, each of which is disposed between the two end caps and distributed circumferentially, and each of the support rings is used to support the blades; the two separators are respectively disposed on opposite sides of each of the support rings and between the end caps.

[0010] In some embodiments, the separator and the end cap have a first distance along the axial direction, the first distance being less than or equal to 60 mm.

[0011] In some embodiments, the impeller further includes a rotating shaft, which is fixedly disposed on the end cover and connected to the separator.

[0012] In some embodiments, the end cap is made of the same material as the blade, and the material hardness of the shaft is greater than that of the end cap.

[0013] On the other hand, this application also provides a crossflow fan, including the aforementioned impeller.

[0014] The beneficial effects of the impeller and crossflow fan provided in this application are as follows: by setting a separator on the inner side of the end cover, the first airflow chamber and the second airflow chamber are separated by the separator. That is, the first airflow chamber, which is prone to vortex formation, is isolated by the separator, so that the vortex in the first airflow chamber will not affect the wind field of the second airflow chamber. This makes the air outlet wind speed at the position of the impeller corresponding to the second airflow chamber stable, and makes the wind speed at both ends of the crossflow fan equal to or close to the middle wind speed, so that the crossflow fan can uniformly discharge air along the axial direction. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional structural diagram of the impeller provided in an embodiment of this application.

[0017] Figure 2 This is a cross-sectional structural diagram of the impeller provided in an embodiment of this application.

[0018] Figure 3 This is an exploded view of the impeller provided in an embodiment of this application.

[0019] Figure 4 This is a three-dimensional structural diagram of the impeller end cover, separator, and rotating shaft provided in the embodiments of this application.

[0020] Figure 5 This is a side view of the impeller end cover, separator, and shaft provided in an embodiment of this application.

[0021] Figure 6 This is a schematic diagram of the structure of the separator in the impeller provided in an embodiment of this application.

[0022] The following are the labeling elements in the figure: 100. Rotating body; 110. Blade; 120. Connecting ring; 130. Support ring; 200. End cap; 210. Airflow hole; 220. Mounting hole; 300. Separator; 310. Slot; 320. Through slot; 330. Locking hole; 400. Rotating shaft; 500. First airflow chamber; 600. Second airflow chamber; 700. Guide groove. Detailed Implementation

[0023] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0024] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0025] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0027] As described in the background section, due to the inherent structural characteristics of crossflow fans, the wind speed at both ends of the crossflow fan is lower than the wind speed in the middle, resulting in uneven airflow along the axial direction.

[0028] It should be noted that the axial direction here refers to the axial direction of the crossflow fan and the impeller. For ease of description, the axial direction of the crossflow fan and the impeller will be referred to as the axial direction in the following text.

[0029] Specifically, current impeller structural designs typically seal both ends of the impeller with end caps, creating dead zones in the air intake areas at both ends. This causes vortices to form at the impeller ends, resulting in unstable airflow velocities at the outlets. Consequently, the airflow velocities at the ends of the crossflow fan are lower than those in the middle, leading to uneven axial airflow. Particularly problematic is when this crossflow fan is used to blow hot air onto the electrode surfaces for heating. Uneven axial airflow results in inconsistent drying of the electrodes, ultimately leading to low lithium battery yield.

[0030] To solve the above-mentioned technical problems, this application provides an impeller and a crossflow fan. By setting a separator 300 between the two end covers 200 and near the end covers 200, the separator 300 separates the areas at both ends of the impeller that are prone to vortex generation, thereby reducing the influence of vortex on the outlet air velocity. This makes the air velocity at both ends of the crossflow fan equal to or close to the middle air velocity, so that the crossflow fan can output air uniformly along the axial direction.

[0031] Please refer to the following: Figures 1 to 5 The impeller provided in the embodiments of this application will now be described.

[0032] The impeller includes blades 110, end caps 200, and separators 300. There are multiple blades 110, which are evenly distributed circumferentially. The ends of the blades 110 are connected to the end caps 200. The separators 300 are provided on the inner side of the end caps 200. The separators 300 and the end caps 200 are spaced apart by a preset distance. The separators 300, the end caps 200, and the blades 110 together form a first airflow cavity 500. The separators 300 and the blades 110 together form a second airflow cavity 600.

[0033] The number of end caps 200 can be one, two, or more. The following explanation uses two end caps 200 as an example. Specifically, there are two end caps 200, which are axially opposite and spaced apart. Each blade 110 is distributed between the two end caps 200, and the blades 110 are spirally and equally spaced circumferentially. Each blade 110 has its opposite ends connected to both end caps 200. The connection between the blades 110 and the end caps 200 can be as follows: the blade 110 can be directly connected to the end cap 200; the blade 110 can be inserted into the end cap 200 and connected to it; or, a connecting ring 120 can be provided at the end of each blade 110, and then the connecting ring 120 can be connected to the end cap 200.

[0034] The number of separators 300 and the number of end caps 200 can be the same. For example, there can be two separators 300, which are respectively located on the inner side of the two end caps 200, that is, the two separators 300 are located between the two end caps 200, and the two separators 300 are respectively located close to the two end caps 200. The separators 300, the end caps 200, and the blades 110 between them together form a first airflow cavity 500, and the two separators 300 and the blades 110 arranged around the separators 300 together form a second airflow cavity 600. External airflow can enter the first airflow chamber 500 and the second airflow chamber 600 through the air inlet of the crossflow fan, and flow out from the first airflow chamber 500 and the second airflow chamber 600 through the air outlet, respectively. Since the separator 300 isolates the first airflow chamber 500, which is prone to vortex formation, the vortex in the first airflow chamber 500 will not affect the air field of the second airflow chamber 600. This makes the air outlet velocity at the position of the impeller corresponding to the second airflow chamber 600 stable, so that the air velocity at both ends of the crossflow fan is equal to or close to the middle air velocity, and the crossflow fan can uniformly discharge air along the axial direction.

[0035] Furthermore, when a cross-flow fan including the aforementioned impeller is used to blow hot air onto the electrode to heat the electrode surface, the drying effect of the cross-flow fan on the electrode is uniform, ultimately resulting in a high yield of lithium batteries.

[0036] In some embodiments, please refer to Figure 1 , Figure 4 and Figure 6 The outer periphery of the separator 300 has a plurality of slots 310, each blade 110 is respectively engaged in each slot 310, and at least a portion of the blade 110 extends out of the slot 310 along the width direction.

[0037] Specifically, the number of slots 310 is equal to the number of blades 110. The slots 310 are evenly distributed along the circumferential direction on the outer periphery of the separator 300, and each blade 110 is correspondingly set with each slot 310. The slots 310 penetrate the outer peripheral surface of the separator 300, that is, the slots 310 form a notch on the outer peripheral surface of the separator 300. One end of the blade 110 along the width direction is inserted into the slot 310 through the notch, and the other end of the blade 110 along the width direction extends out of the slot 310.

[0038] It should be noted that the blade 110 has a long, strip-shaped structure. During assembly, the length direction of the blade 110 is set to be parallel to the axis of the impeller. That is, the two opposite ends of the blade 110 along its length are respectively connected to the two end caps 200. The width direction of the blade 110 refers to the direction perpendicular to the length direction of the blade 110, that is, the helical extension direction of the blade 110. Specifically, it refers to the extension direction of the blade 110 from one end toward the center of the impeller to the other end away from the center of the impeller. The thickness direction of the blade 110 is the direction in which the blade 110 is relatively smaller, and it also refers to the direction in which the blades 110 are distributed.

[0039] Please see Figure 1 and Figure 2 At least a portion of the blade 110 extends out of the slot 310 along its width. The portions of adjacent blades 110 extending out of the slot 310 and the outer peripheral surface of the separator 300 together form a guide groove 700. The guide groove 700 connects the first airflow chamber 500 and the second airflow chamber 600, enabling the introduction of airflow from the first airflow chamber 500 into the second airflow chamber 600, or vice versa. This reduces the vortex region in both the first and second airflow chambers, thereby stabilizing the outlet air velocity at the position of the impeller corresponding to the second airflow chamber 600. Furthermore, the slot 310 connects the separator 300 and the blade 110, allowing the separator 300 to not only function as a separator but also to support the blade 110. It is understood that in other embodiments of this application, the separator 300 may not be connected to the blade 110. The separator 300 is disposed in the space enclosed by each blade 110 and is connected to the end cap 200. This is not a unique limitation.

[0040] Optionally, the thickness of the separator 300 ranges from 1mm to 2mm, for example, the thickness of the separator 300 can be 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, or 2mm, etc. By limiting the thickness direction of the separator 300, the thickness of the separator 300 is made sufficiently small, so that the guide groove 700 formed by the outer peripheral surfaces of the two adjacent blades 110 and the separator 300 has a certain airflow guiding effect. However, the thickness of the separator 300 cannot be too small, as this would result in low structural strength and unstable separation effect; conversely, the thickness of the separator 300 cannot be too large, as this would lead to an insignificant guiding effect of the guide groove 700.

[0041] Preferably, the thickness of the separator 300 is 1.5 mm.

[0042] Optionally, please refer to Figure 6The separator 300 is circular, and multiple slots 310 are evenly distributed along the axial direction on the outer circumferential surface of the separator 300. Each slot 310 is spiral-shaped to match the shape of the blade 110.

[0043] Optionally, the separator 300 is positioned in a closed manner between the first airflow cavity 500 and the second airflow cavity 600. That is, the separator 300, except for the groove 310 formed on its outer periphery, has no grooves elsewhere, to prevent eddies in the first airflow cavity 500 from entering the second airflow cavity 600. It will be understood that in other embodiments of this application, please refer to... Figure 6 The separator 300 has a through groove 320 connecting the first airflow chamber 500 and the second airflow chamber 600. The through groove 320 ensures that the end of the second airflow chamber 600 is not closed, reducing the possibility of vortices forming at the end of the second airflow chamber 600, thereby stabilizing the airflow velocity at the outlet of the impeller corresponding to the second airflow chamber 600. Optionally, there can be multiple through grooves 320, evenly distributed around the centerline of the impeller and extending circumferentially along the impeller. This arrangement allows the airflow to flow along the direction of impeller rotation during rotation, improving airflow efficiency.

[0044] In some embodiments, please refer to Figure 4 The end cap 200 has an axially penetrating airflow hole 210, which communicates with the first airflow chamber 500. The airflow hole 210 serves to relieve pressure in the first airflow chamber 500, drawing airflow out to reduce vortex areas and stabilize the wind field within the first airflow chamber 500. This ensures that the wind speed in the first airflow chamber 500 is close to or equal to the wind speed in the second airflow chamber 600, thereby increasing the axial length of the crossflow fan's wind speed uniformity.

[0045] Optionally, please refer to Figure 4 The number of airflow holes 210 is multiple, and each airflow hole 210 is distributed at intervals along the circumference of the impeller. This arrangement allows the airflow to flow along the rotation direction of the impeller when it rotates, thereby improving the airflow efficiency.

[0046] Optionally, each airflow hole 210 is evenly distributed along the circumference of the impeller, and the airflow hole 210 is an elongated hole extending along the circumference of the impeller.

[0047] Optionally, please refer to Figure 5 The end cap 200 has a mounting hole 220 at its center for the shaft 400 to pass through, and each airflow hole 210 is evenly distributed around the outer periphery of the mounting hole 220 in the circumferential direction.

[0048] Understandably, in other embodiments of this application, the number of airflow holes 210 may also be one, the airflow hole 210 extends circumferentially along the impeller, and the airflow hole 210 is an annular hole surrounding the mounting hole 220.

[0049] In some embodiments, please refer to Figure 1 and Figure 3 The impeller also includes multiple support rings 130, each of which is located between two end caps 200 and distributed circumferentially. Each support ring 130 is used to support the blades 110. Two separators 300 are respectively located on opposite sides of each support ring 130 and between the end caps 200. That is, the separators 300 are located at opposite ends of the impeller in low wind speed areas where vortices are easily generated, so as to separate the low wind speed areas and reduce the impact of the low wind speed areas on the high wind speed areas.

[0050] Optionally, the separator 300 and the end cap 200 have a first distance D1 along the axial direction, the first distance D1 being less than or equal to 60mm. For example, the first distance D1 can be 60mm, 55mm, 50mm, 45mm, 40mm, 35mm, 30mm, 25mm, 20mm, 15mm, or 10mm, preferably 60mm, 55mm, 50mm, 45mm, or 40mm. The first distance D1 cannot be too large, as this would affect the normal wind speed range of the impeller. Conversely, the first distance D1 cannot be too small, as this would prevent the separator 300 from achieving its separating effect.

[0051] Tests have shown that when the first distance D1 between the separator 300 and the end cap 200 is 60mm, the length of the low-speed region at both ends of the impeller can be reduced, and the axial length of the low-speed region can be reduced from 150mm to 80mm, thereby improving the overall uniformity of the impeller's airflow.

[0052] In some embodiments, please refer to Figure 2 , Figure 4 and Figure 5The impeller also includes a rotating shaft 400, which is fixedly mounted on the end cover 200 and connected to the separator 300. The rotating shaft 400 enables a rotatable connection between the impeller and the external mounting base. It also connects the end cover 200 and the separator 300, allowing the separator 300 to be stably assembled inside the impeller. Furthermore, when the outer periphery of the separator 300 has a groove 310, and a portion of the blade 110 along its width direction is engaged in the groove 310, the rotating shaft 400 can drive each blade 110 to rotate via the separator 300, reducing the difficulty of driving the blades 110 to rotate. Understandably, in other embodiments of this application, the shaft 400 may also be connected to the end cover 200, but not to the separator 300. The separator 300 is installed in the impeller by snapping with each blade 110, or the connection between the separator 300 and the end cover 200 may be formed by other connecting members. This is not the only one.

[0053] In this application, the end cap 200 and blades 110 need to operate at a high temperature of 200°C. If the thermal expansion coefficients of the end cap 200 and blades 110 are different, they are prone to loosening. In addition, crossflow fans generally drive the rotating shaft 400 to rotate through a motor or other drive components. The rotating shaft 400 is supported and mounted on the mounting base by bearings. The rotating shaft 400 needs to rotate relative to the bearings, mounting base, and other structures. If the rigidity of the rotating shaft 400 is insufficient, it will easily wear down, causing metal particles and dust to fall off, thus contaminating the electrode sheets.

[0054] To address the aforementioned technical issues, in this embodiment, the materials of the separator 300, end cap 200, and blade 110 are made identical. This ensures that after the end cap 200 is welded to the blade 110, operating at 200°C, the end cap 200 and blade 110 have the same coefficient of thermal expansion, reducing the likelihood of loosening. Furthermore, by setting the material hardness of the shaft 400 to be greater than that of the end cap 200, the shaft 400 achieves sufficient structural rigidity, reducing the shedding of metal dust due to wear during high-speed rotation and thus minimizing the possibility of electrode contamination.

[0055] Optionally, both the separator 300 and the end cap 200 are made of aluminum, and the blade 110 is also made of aluminum. It is understood that in other embodiments of this application, when the blade 110 is made of other materials, the separator 300 and the end cap 200 may also be made of other materials, such as aluminum alloy or engineering plastics, and this is not the only limitation.

[0056] Optionally, the shaft 400 is made of SUS304 austenitic stainless steel. Austenitic stainless steel not only has high hardness but also can operate in high-temperature environments, such as at 200°C, while maintaining high structural hardness and strength. It is understood that in other embodiments of this application, the shaft 400 may also be made of other materials with high hardness, such as low-alloy heat-resistant steel or copper alloys.

[0057] Optionally, please refer to Figure 5 The end cap 200 has a mounting hole 220, the rotating shaft 400 passes through the mounting hole 220, and the rotating shaft 400 and the end cap 200 are welded to form a connection between the rotating shaft 400 and the end cap 200.

[0058] Optionally, please refer to Figure 5 and Figure 6 The separator 300 has a locking hole 330, and the rotating shaft 400 has a first end and a second end disposed opposite to each other. The first end of the rotating shaft 400 has a mating hole, and the second end of the rotating shaft 400 extends to the outside of the end cover 200 for connection with the drive component. A locking member passes through the locking hole 330 and the mating hole to lock the separator 300 and the rotating shaft 400 together. During assembly, the separator 300, the end cover 200, and the rotating shaft 400 can be installed together into the impeller.

[0059] In some embodiments, please refer to Figure 1 and Figure 3 The impeller also includes two connecting rings 120, which are respectively disposed at opposite ends of each blade 110 along the axial direction. The opposite ends of each blade 110 are integrally connected to the two connecting rings 120. An end cap 200 is inserted into the connecting rings 120 for welding. The connecting rings 120 not only connect the blades 110 as a whole to ensure the structural strength of each blade 110 and reduce the assembly difficulty of each blade 110, but also form the connection between each blade 110 and the end cap 200. It is understood that in other embodiments of this application, the connecting rings 120 may be omitted, and the opposite ends of each blade 110 may be directly inserted into the two end caps 200 and welded together; this is not a limiting factor.

[0060] Optionally, each support ring 130 is also integrally connected to each blade 110. Each blade 110, each support ring 130, and the two connecting rings 120 together form the rotating body 100. The rotating body 100 can be formed integrally, which not only reduces the molding and assembly difficulty of each blade 110, each support ring 130, and the two connecting rings 120, but also improves the overall structural strength of each blade 110, each support ring 130, and the two connecting rings 120. Specifically, the rotating body 100 can be formed by stretching alloy material to a specified length using a stretching die, then positioned using a machine tool, and partially removing the metal surface to expose the blades 110. Partial metal surfaces are left on the substrate through machining to form the support rings 130. Next, the entire wall thickness of the stretching die is removed using a lathe, exposing the inner side of the blades 110, and the support rings 130 are connected to the blades 110. Understandably, in other embodiments of this application, the blade 110 may also be separately disposed from the support ring 130, or separately disposed from the connecting ring 120. The blade 110 may be connected to the support ring 130 by snap-fit, and the two ends of the blade 110 may be connected to the connecting ring 120 by welding. This is not a unique limitation.

[0061] Optionally, the inner diameter of the connecting ring 120 is less than or equal to the outer diameter of the end cap 200. During assembly, the inner hole of the connecting ring 120 is enlarged by heating, and then the end cap 200, the separator 300, and the rotating shaft 400 are installed into the rotating body 100. Specifically, the end cap 200 is installed into the connecting ring 120, and finally, the end cap 200 and the connecting ring 120 are fixedly connected as a whole by cooling.

[0062] On the other hand, this application also provides a crossflow fan, including the aforementioned impeller. The crossflow fan provided in this application, through the arrangement of the impeller, ensures that the outlet air velocity of the crossflow fan is uniformly distributed along the axial direction.

[0063] In some embodiments, the crossflow fan further includes two mounting bases, a drive unit, and a volute. The two mounting bases are axially spaced apart, and an impeller is disposed between the two mounting bases. The opposite ends of the impeller are rotatably mounted on the two mounting bases via a rotating shaft 400. The volute is connected between the two mounting bases and is fitted over the impeller. An air inlet and an air outlet are formed on the volute. The drive unit is mounted on one of the mounting bases and is used to output rotational motion. The output end of the drive unit is connected to the rotating shaft 400. The drive unit drives the impeller to rotate via the rotating shaft 400. The rotation of the impeller drives external airflow to enter the crossflow fan from the air inlet, enter the impeller radially, and flow out radially from the impeller under the drive of the impeller, and flow into the crossflow fan from the air outlet.

[0064] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An impeller, characterized in that, It includes blades, end caps, and separators. There are multiple blades, and each blade is evenly distributed circumferentially. The ends of the blades are connected to the end caps. The separators are provided on the inner side of the end caps. The separators are spaced at a preset distance from the end caps. The separators, the end caps, and each blade together form a first airflow cavity, and the separators and each blade together form a second airflow cavity.

2. The impeller as described in claim 1, characterized in that, The outer periphery of the separator is formed with a plurality of slots, each blade is respectively engaged in the slot, and at least a portion of the blade extends out of the slot along the width direction.

3. The impeller as described in claim 1, characterized in that, The thickness of the separator ranges from 1mm to 2mm.

4. The impeller as described in any one of claims 1 to 3, characterized in that, The end cap has an axially penetrating airflow hole that communicates with the first airflow chamber.

5. The impeller as described in claim 4, characterized in that, The airflow hole extends circumferentially along the impeller; Alternatively, there may be multiple airflow holes, which are distributed at intervals along the circumference of the impeller.

6. The impeller as described in any one of claims 1 to 3, characterized in that, The impeller also includes multiple support rings, each of which is disposed between the two end caps and distributed circumferentially, and each support ring is used to support the blades; the two separators are respectively disposed on opposite sides of each support ring and between the end caps.

7. The impeller as described in any one of claims 1 to 3, characterized in that, The separator and the end cap have a first distance along the axial direction, the first distance being less than or equal to 60 mm.

8. The impeller as described in any one of claims 1 to 3, characterized in that, The impeller also includes a rotating shaft, which is fixedly installed through the end cover and connected to the separator.

9. The impeller as described in claim 8, characterized in that, The end cap is made of the same material as the blade, and the material hardness of the shaft is greater than that of the end cap.

10. A crossflow fan, characterized in that, Includes the impeller as described in any one of claims 1 to 9.

Images