Combined blade device and combined air outlet device

Abstract

A combined blade and a combined air outlet device. The combined blade (100) comprises a hub (110), a first air inlet port (140) being formed at the outer edge of a first end of the hub (110), a first air outlet port (150) being formed at the outer edge of a second end of the hub (110), a centrifugal cavity (111) being provided in the hub (110), a second air inlet port (112) being provided at the first end of the hub (110), the first air inlet port (140) surrounding the outer side of the second air inlet port (112), a second air outlet port (113) being provided at the second end of the hub (110), both the second air inlet port (112) and the second air outlet port (113) being communicated with the centrifugal cavity (111), and the hub (110) expanding gradually along the direction of the second air inlet port (112) towards the second air outlet port (113); diagonal flow blades (120), connected to the side of the hub (110) farthest from the centrifugal cavity (111); and centrifugal blades (130), connected to the hub (110) and located in the centrifugal cavity (111), rotating axes of the diagonal flow blades (120) and the centrifugal fan blade (130) coinciding. The combined blade can use an air inlet area of the hub at an air inlet side to increase the air inlet volume, thereby increasing the air volume and air pressure of the air outlet device.

Description

Combined fan blade device and combined air outlet device

[0001] Cross-references to related applications

[0002] This disclosure is based on the Chinese application with application number 202111639861.0 and application date December 29, 2021, and claims its priority. The disclosed content of the Chinese application is hereby introduced into this disclosure as a whole. Technical Field

[0003] The present disclosure relates to a combined fan blade device and a combined air outlet device. Background Art

[0004] The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.

[0005] Traditional high-pressure, high-speed fans are generally diagonal flow fans. There is a hub in the middle of the diagonal flow fan blades, and air can only enter from the outside of the hub, resulting in some invalid air intake areas in the diagonal flow fan, affecting the air intake volume of the diagonal flow fan. The air also forms turbulence in this area, interfering with the normal air intake of the diagonal flow fan and affecting the wind pressure and air output of the diagonal flow fan.

[0006] Summary of the Invention

[0007] The present disclosure aims to solve at least one of the technical problems existing in the prior art. To this end, the present disclosure proposes a combined fan blade device and a combined air outlet device, which can fully utilize the air inlet area of ​​the fan blade and improve the wind pressure and air volume of the air outlet device.

[0008] According to the first embodiment of the present disclosure, the combined fan blade device includes:

[0009] The wheel hub has a first air inlet formed on the outer side of the edge of the first end of the wheel hub, a first air outlet formed on the outer side of the edge of the second end of the wheel hub, a centrifugal cavity is provided inside the wheel hub, a second air inlet is provided at the first end of the wheel hub, the first air inlet surrounds the outer side of the second air inlet, a second air outlet is provided at the second end of the wheel hub, the second air inlet and the second air outlet are both connected to the centrifugal cavity, and the wheel hub gradually expands in a direction from the second air inlet to the second air outlet;

[0010] A diagonal flow blade connected to the side of the hub away from the centrifugal chamber; and

[0011] The centrifugal fan blades are connected to the hub and are located in the centrifugal cavity. The rotating axes of the diagonal flow fan blades and the centrifugal fan blades coincide with each other.

[0012] The combined fan blade device according to the embodiment of the present disclosure has at least the following beneficial effects:

[0013] In the embodiment of the present disclosure, the air inlet side of the hub has a second air inlet, and the first air inlet is formed on the outer side of the edge of the first end of the hub, which can make full use of the air inlet area of ​​the hub on the air inlet side and increase the amount of air entering. There is no turbulence on the air inlet side of the hub, which facilitates air entry to improve the working efficiency of the air outlet device, and the oblique flow blades and the centrifugal blades can form two airflows respectively, which merge after being discharged from the air outlet, and can effectively increase the air volume and air pressure of the air outlet device.

[0014] According to some embodiments of the present disclosure, the combined fan blade device further includes a connecting portion, a plurality of centrifugal fan blades are provided, and at least some of the centrifugal fan blades are connected to the connecting portion at one end away from the first air outlet.

[0015] According to some embodiments of the present disclosure, some centrifugal blades connected to the adapter portion and some centrifugal blades not connected to the adapter portion are alternately arranged along the circumferential direction of the hub.

[0016] According to some embodiments of the present disclosure, a plurality of adapter parts are provided, and the plurality of adapter parts are distributed at intervals. In a plane perpendicular to the rotation axis of the centrifugal fan blade, the projection of the adapter part is located outside the projection of the first end of the hub.

[0017] According to some embodiments of the present disclosure, the plurality of transition portions are evenly spaced apart along the circumferential direction of the hub.

[0018] According to a second aspect of the present disclosure, a combined air outlet device includes:

[0019] A combined fan blade device according to the first aspect of the embodiment;

[0020] A deflector cover, wherein at least a portion of the combined fan blade device is disposed inside the deflector cover;

[0021] The driving element is connected to the combined fan blade device and is used to drive the combined fan blade device to rotate.

[0022] The combined air outlet device according to the embodiment of the present disclosure has at least the following beneficial effects:

[0023] In the embodiment of the present disclosure, the air deflector is arranged on the outer side of the hub and forms an air duct between the hub and the hub, which can fully utilize the air inlet area on the air inlet side of the air outlet device. The airflow generated by the centrifugal fan blades and the oblique flow fan blades is discharged from the first air outlet and the second air outlet and then merged to increase the air volume and air pressure of the air outlet device.

[0024] According to some embodiments of the present disclosure, the area enclosed by the outer edge of the air duct and the first end of the hub is the first air inlet, and the area enclosed by the outer edge of the air duct and the second end of the hub is the first air outlet.

[0025] According to some embodiments of the present disclosure, the combined air outlet device further includes a base, which is connected to a side of the centrifugal fan blade away from the second air inlet, and the base is used to install a driving element.

[0026] According to some embodiments of the present disclosure, an edge of the base away from the rotation axis is flush with the second end of the hub in the direction of the rotation axis.

[0027] According to some embodiments of the present disclosure, the air guide cover has a first guide section and a second guide section. The first guide section is arranged around the outer periphery of the wheel hub, and the second guide section is arranged around the outer periphery of the base and blocks the second air outlet along the radial direction of the wheel hub. The second guide section is used to guide the airflow discharged from the first air outlet and the second air outlet, and at least a portion of the second guide section is parallel to the rotation axis.

[0028] According to some embodiments of the present disclosure, the inner surface of the connection between the first guide section and the second guide section is a curved surface, and the curved surface gradually approaches the second air outlet along the flow direction of the airflow.

[0029] According to some embodiments of the present disclosure, the combined air outlet device also includes a mounting seat, which is connected to the side of the base away from the hub, and the air guide cover also includes a third guide section, which is connected to the end of the second guide section away from the first air inlet, and the third guide section is arranged around the outside of the mounting seat, and the third guide section and part of the mounting seat are parallel to the rotation axis.

[0030] According to some embodiments of the present disclosure, the mounting seat includes a drainage portion and a mounting portion, the mounting portion is connected to a side of the base away from the hub, the drainage portion is connected to an outer edge of the mounting portion away from the rotation axis, and the drainage portion is parallel to the rotation axis and extends in a direction away from the base.

[0031] According to some embodiments of the present disclosure, the combined air outlet device further includes a guide vane, a guide cavity is formed between the third guide section and the mounting seat, and the guide vane is accommodated in the guide cavity and connected between the third guide section and the mounting seat.

[0032] Additional aspects and advantages of the present disclosure will be given in part in the description that follows and, in part, will be obvious from the description that follows, or will be learned through practice of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0034] FIG1 is a schematic structural diagram of some embodiments of the combined fan blade device disclosed herein.

[0035] FIG2 is a schematic structural diagram of some embodiments of the combined fan blade device in FIG1 after being matched with the air guide cover.

[0036] FIG3 is a schematic diagram of airflow directions of some embodiments of the combined fan blade device in FIG2 .

[0037] FIG4 is a schematic structural diagram of other embodiments of the combined fan blade device disclosed herein.

[0038] FIG5 is a schematic structural diagram of some further embodiments of the combined fan blade device disclosed herein.

[0039] FIG6 is a cross-sectional view of some embodiments of the combined air outlet device disclosed herein.

[0040] FIG. 7 is a schematic structural diagram of some embodiments of the base in FIG. 6 .

[0041] FIG8 is a cross-sectional view of some other embodiments of the combined air outlet device disclosed herein.

[0042] FIG9 is a cross-sectional view of some further embodiments of the combined air outlet device disclosed herein.

[0043] FIG. 10 is a schematic structural diagram of some embodiments of the combined air outlet device in FIG. 8 .

[0044] FIG. 11 is a cross-sectional view of some embodiments of the air duct shown in FIG. 9 .

[0045] Description of Reference Numerals

[0046] 100. Combined fan blade device; 110. Hub; 111. Centrifugal cavity; 112. Second air inlet; 113. Second air outlet; 120. Diagonal flow blade; 130. Centrifugal blade; 140. First air inlet; 150. First air outlet; 160. Air duct; 170. Adapter; 200. Air guide cover; 210. First guide section; 220. Second guide section; 230. Third guide section; 240. Guide cavity; 300. Drive element; 400. Base; 410. Protrusion; 500. Mounting seat; 510. Drainage section; 520. Mounting section; 600. Guide blade. DETAILED DESCRIPTION

[0047] The following describes in detail embodiments of the present disclosure, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present disclosure and are not to be construed as limiting the present disclosure.

[0048] In the description of the present disclosure, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present disclosure.

[0049] In the description of this disclosure, "several" means more than one, "plural" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The terms "first" and "second" are used solely to distinguish technical features and are not to be construed as indicating or implying relative importance, or as implicitly specifying the number or order of the technical features indicated.

[0050] In the description of the present disclosure, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present disclosure based on the specific content of the technical solution.

[0051] Throughout the description of this disclosure, reference to terms such as "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least some of the embodiments or examples of this disclosure. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0052] In an embodiment of the present disclosure, a combined fan blade device 100 is provided, which can be used in conjunction with a deflector 200 to provide relatively independent air ducts for different fan blades, so that the fan blades can form airflow in the air duct 160 and merge the airflow after forming. Specifically, as shown in Figure 1, the combined fan blade device 100 includes a hub 110, a diagonal flow fan blade 120 and a centrifugal fan blade 130. As shown in Figure 2, the air guide cover 200 is arranged on the outside of the hub 110, and a first air inlet 140 is formed between the first end of the hub 110 and the air guide cover 200, and a first air outlet 150 is formed between the second end of the hub 110 and the air guide cover 200. The gap between the air guide cover 200 and the hub 110 forms an air duct 160 for the diagonal flow fan blade 120 to form an airflow; a centrifugal cavity 111 is provided inside the hub 110, and the centrifugal fan blade 130 is located in the centrifugal cavity 111 and is connected to the hub 110. The diagonal flow fan blade 120 is connected to the side of the hub 110 away from the centrifugal cavity 111, so that the diagonal flow fan blade 120 and the centrifugal fan blade 130 are respectively provided on the inner and outer sides of the hub 110. The central axes of the hub 110 , the diagonal flow blades 120 , the centrifugal blades 130 and the air guide cover 200 all coincide with each other.

[0053] A second air inlet 112 is provided at the first end of the hub 110 , and the first air inlet 140 is arranged around the outside of the second air inlet 112 . A second air outlet 113 is provided at the second end of the hub 110 . Both the second air inlet 112 and the second air outlet 113 are connected to the centrifugal cavity 111 .

[0054] As shown in FIG3 , the hub 110 gradually expands outward along the direction of the second air inlet 112 toward the second air outlet 113, and the rotating axes of the oblique flow blades 120 and the centrifugal blades 130 coincide with each other, and the two are superimposed and combined in the axial direction. When the combined fan blade device 100 is driven to rotate, the oblique flow blades 120 and the centrifugal blades 130 rotate synchronously, and the external air enters the air duct 160 formed by the air guide 200 and the hub 110 from the first air inlet 140, and enters the centrifugal cavity 111 from the second air inlet 112. The air forms an airflow driven by the rotation of the oblique flow blades 120 and the centrifugal blades 130; due to the wall-adhering effect of the airflow, the centrifugal cavity When the air flow in the body 111 is discharged from the second air outlet 113, it flows out along the inner wall of the hub 110. Under the guidance of the oblique flow blades 120 and the air guide cover, the air flow in the air duct 160 is formed by the rotation of the oblique flow blades 120 and is discharged outward from the first air outlet 150. The air flows formed by the oblique flow blades 120 and the centrifugal blades 130 are both blown toward the outside of the hub. The air flows formed by the two are discharged from the air outlet and then merged. Since the air flow formed by the oblique flow blades 120 has a large air volume and the air flow formed by the centrifugal blades 130 has a large wind pressure, after the two air flows merge, the air volume and wind pressure of the mixed air flow can be effectively increased.

[0055] The air inlet side of the hub 110 has a first air inlet 140, and cooperates with the air deflector 200 to form a second air inlet 112, which can make full use of the air inlet area of ​​the hub 110 on the air inlet side to increase the amount of air entering. There is no turbulence on the air inlet side of the hub 110, which facilitates air entry to improve the working efficiency of the air outlet device, and the oblique flow blades 120 and the centrifugal blades 130 can respectively form two airflows, which merge after being discharged from the air outlet, and can effectively increase the air volume and air pressure of the air outlet device.

[0056] It should be noted that both the diagonal flow blades 120 and the centrifugal blades 130 can be provided in plurality, and the plurality of diagonal flow blades 120 are evenly distributed on the outside of the hub 110, and the combination of the plurality of diagonal flow blades 120 guides the air in the air duct 160, and the plurality of centrifugal blades 130 are evenly distributed on the inside of the hub 110, and the combination of the plurality of centrifugal blades 130 guides the air in the centrifugal cavity 111, which can improve the air outlet efficiency of the combined fan blade device 100.

[0057] The shapes of the oblique flow blades 120 and the centrifugal blades 130 can be conventional blade structures. The hub 110 adopts a conical structure to facilitate oblique guidance of the air. The rotation of the oblique flow blades 120 drives the air to perform centrifugal and axial motions at the same time, and generates oblique airflow. The gradually expanding shape of the hub 110 can make the air entering the air duct 160 from the axial direction be discharged from the radial periphery of the base 400 through the guidance of the oblique flow blades 120, so that the flow direction of the airflow derived from the oblique flow blades 120 is almost parallel to the flow direction of the airflow derived from the centrifugal blades 130, which facilitates the convergence of the airflow and avoids turbulence after the convergence of the airflow.

[0058] The diagonal flow blades 120 are connected to the outer side of the hub 110 in an inclined manner, so that the effective width of the diagonal flow blades 120 is wider. The diagonal flow blades 120 can be spiral and configured as a curved structure that complies with the ternary flow design.

[0059] As shown in Figure 4, the combined fan blade device also includes a connecting portion 170, and at least part of the centrifugal fan blades 130 are connected to the connecting portion 170 at one end away from the first air outlet 150. The connecting portion 170 can be used to connect a driving element that drives the combined fan blade device to rotate, or to install an adapter plate connected to the driving element; the connecting portion 170 is located in the centrifugal cavity 111, and the connecting portion 170 can be set to a columnar shape and have a mounting hole for external elements to connect. It should be noted that the connecting portion 170 is provided at the end of the centrifugal fan blade 130. On the one hand, it is convenient to assemble the combined fan blade device with other components. On the other hand, since the connecting portion 170 has a simple structure and occupies a small space, the combined fan blade device can be manufactured in an integrated manner, which reduces the processing cost of the combined fan blade device.

[0060] As shown in Figure 4, a connecting portion 170 is provided and is located at the center of the centrifugal cavity 111, a plurality of centrifugal blades 130 are provided, and the ends of some centrifugal blades 130 are connected to the connecting portion 170, so that the combined fan blade device can be connected to external elements through the connecting portion 170.

[0061] In some embodiments, some centrifugal blades 130 connected to the adapter 170 and some centrifugal blades 130 not connected to the adapter 170 are alternately arranged along the circumferential direction of the hub 110, which can increase the smoothness of the airflow while reducing the processing difficulty and improving the air outlet efficiency of the combined fan blade device.

[0062] As shown in Figure 5, a plurality of adapter parts 170 can be provided, and the plurality of adapter parts 170 are arranged at intervals. The center of the circumscribed circle of the plurality of adapter parts 170 is located on the rotation axis. In a plane perpendicular to the rotation axis direction of the centrifugal fan blade 130, the projection of the adapter part 170 is located outside the projection of the first end of the hub 110. Therefore, the adapter part 170 does not affect the flow of the airflow in the central area of ​​the centrifugal cavity 111, making the flow of the airflow smoother and improving the air outlet efficiency of the combined fan blade device.

[0063] In some embodiments, a plurality of adapters 170 are evenly spaced along the circumferential direction of the hub 110, and some centrifugal blades 130 connected to the adapters 170 and some centrifugal blades 130 not connected to the adapters 170 are alternately and evenly spaced along the circumferential direction of the hub 110. For example, four adapters 170, four centrifugal blades connected to the adapters 170, and four centrifugal blades not connected to the adapters 170 are each provided, and adjacent centrifugal blades 130 are evenly distributed at 45° along the circumferential direction. This embodiment, by providing two types of evenly spaced centrifugal blades 130, can increase the smoothness of airflow, reduce processing difficulty, and improve the air outlet efficiency and air outlet stability of the combined fan blade device.

[0064] In some embodiments, the diagonal flow blades 120 are located within the air duct 160 formed by the hub 110 and the air deflector 200. One side of the diagonal flow blades 120 is connected to the hub 110, and a gap exists between the other side and the air deflector 200, allowing the diagonal flow blades 120 to rotate relative to the air deflector 200. The width of the diagonal flow blades 120 gradually decreases as they approach the first air outlet 150. While the gap between the diagonal flow blades 120 and the air deflector 200 remains unchanged, the width of the air duct 160 formed by the hub 110 and the air deflector 200 also gradually decreases. The area enclosed by the first air outlet 150 is smaller than the area enclosed by the first air inlet 140. After air enters the air duct 160 from the first air inlet 140, the pressure of the airflow increases as the width of the air duct 160 decreases, thereby enhancing the wind pressure of the airflow formed by the diagonal flow blades 120.

[0065] In addition, the two sides of the centrifugal blades 130 are respectively connected to the hub 110 and the base 400, and the multiple centrifugal blades 130 are evenly distributed around the rotation axis. The air entering the centrifugal cavity 111 from the second air inlet 112 flows from the center of the centrifugal cavity 111 along the radial direction of the base 400 as the centrifugal blades 130 rotate, and is discharged from the second air outlet 113 on the outer edge of the base 400. Since the hub 110 gradually expands outward along the flow direction of the airflow, in order to facilitate the centrifugal blades 130 to guide the air and increase the wind pressure of the airflow, the width of the centrifugal blades 130 gradually decreases from the center position to the second air outlet 113. The width of the centrifugal blades 130 refers to the distance of the centrifugal blades 130 along the direction of the rotation axis. Therefore, the gap between the hub 110 and the base 400 gradually decreases from the center position to the second air outlet 113, which can effectively enhance the wind pressure of the centrifugal airflow.

[0066] 6 , a combined air outlet device is also provided in an embodiment of the present disclosure, including the above-mentioned combined fan blade device 100, and also including a guide cover 200 and a driving element 300. At least part of the combined fan blade device 100 is inserted into the guide cover 200. The guide cover 200 is arranged on the outer side of the hub 110 and forms an air duct 160 with the hub 110. The gap between the guide cover 200 and the first end of the hub 110 forms a first air inlet 140. The first air inlet 140 is arranged on the outer periphery of the second air inlet 112 to fully utilize the air inlet area on the air inlet side of the air outlet device. The driving element 300 is connected to the combined fan blade device 100 and is used to drive the combined fan blade device 100 to rotate. The centrifugal fan blades 130 and the diagonal flow fan blades 120 rotate synchronously. The generated airflow is discharged from the first air outlet 150 and the second air outlet 113 and then merged to increase the air volume and air pressure of the air outlet device.

[0067] The combined air outlet device also includes a base 400, which is positioned near the second end of the hub 110 and spaced apart from the hub 110. The base 400 is connected to the side of the centrifugal blades 130 that is away from the second air inlet 112. The base 400 is used to mount the drive element 300. The base 400 limits the air outlet area of ​​the second air outlet 113 and guides the airflow within the centrifugal cavity 111, allowing the airflow generated by the centrifugal blades 130 to be discharged toward the outside of the hub 110, thereby merging with the airflow generated by the diagonal flow blades 120.

[0068] The base 400 can be connected to the centrifugal blade 130 by bonding or welding, or by a detachable connection. In some embodiments, as shown in FIG7 , the base 400 is flat and has assembly holes for the adapter 170 . The adapter 170 is connected to the base 400 by screw fastening. Compared with bonding or welding, this facilitates the assembly of the combined fan device and the base 400, as well as the subsequent maintenance of the base 400 and the combined fan device.

[0069] A protrusion 410 for installing the output shaft of the driving element 300 is provided at the center of the base 400. The protrusion 410 can be accommodated between multiple adapters 170 to facilitate the connection between the driving element 300 and the combined fan blade device, and through the connection between the driving element 300 and the base 400, the driving element 300 can drive the combined fan blade device as a whole to rotate.

[0070] The edge of the base 400 away from the rotation axis can be retracted toward the rotation axis compared to the edge of the hub 110, or the edge of the base 400 can be flush with the edge of the second end of the hub 110 in the rotation axis direction. As shown in Figure 6, the end of the air duct 200 close to the base 400 and the end of the hub 110 close to the base 400 are both flush with the edge of the base 400. Under this setting, the airflow discharged from the first air outlet 150 is discharged outward along the radial direction of the base 400, and the airflow discharged from the second air outlet 113 is discharged outward along the radial direction of the base 400. The mixed airflow after the two are merged flows toward the outside of the base 400 at the same time, so that the air outlet device can achieve the effect of axial air intake and circumferential air outlet. Compared with the traditional centrifugal fan, the air volume and air pressure of the air outlet device are improved at the same time. The air outlet device can be suitable for electrical appliances with circumferential air outlet requirements such as vacuum cleaners and sweeping robots.

[0071] The hub 110 and the shroud 200 are both tilted toward the base 400, so the airflow discharged from the second air outlet 113 still tends to flow toward the base 400, facilitating the merging of the airflow discharged from the second air outlet 113 with the airflow discharged from the first air outlet 150. It is conceivable that the side of the hub 110 near the first air outlet 150 and the side of the shroud 200 near the second air outlet 113 can be as parallel to the base 400 as possible, so that the airflow discharged from the first air outlet 150 and the airflow discharged from the second air outlet 113 can merge in the same direction, effectively reducing the risk of turbulence caused by the merging airflows.

[0072] As shown in Figure 8, the air guide 200 has a first guide section 210 and a second guide section 220. The first guide section 210 is arranged around the outer periphery of the hub 110 and forms an air duct 160 with the outer side of the hub 110. The second guide section 220 is arranged around the outer periphery of the base 400 and has a gap with the outer edge of the base 400. The second guide section 220 is used to guide the airflow discharged from the first air outlet 150 and the second air outlet 113. The airflow discharged from the first air outlet 150 and the airflow discharged from the second air outlet 113 merge to form a mixed airflow. Due to the radial obstruction of the second guide section 220, the mixed airflow no longer flows radially toward the base 400. Under the guiding action of the second guide section 220, the mixed airflow continues to flow in the direction away from the air inlet.

[0073] It can be imagined that in order to avoid the first guide section 210 from having a too large bending angle relative to the second guide section 220, which would cause noise at the connection between the two, the second guide section 220 can be set so that the opening gradually increases in the direction away from the air inlet, so that the second guide section 220 is inclined at a certain angle relative to the rotation axis of the fan blade to reduce the bending angle of the second guide section 220 relative to the first guide section 210.

[0074] Furthermore, the inner surface of the connection between the first guide section 210 and the second guide section 220 is a curved surface, which gradually approaches the second air outlet 113 along the flow direction of the airflow. Setting the connection surface between the first guide section 210 and the second guide section 220 as a curved surface can avoid the airflow from gathering at the connection between the two to form noise, and prevent the resistance of the airflow at the connection from increasing, so that the airflow can flow more smoothly from the first guide section 210 to the second guide section 220; since the curved surface gradually approaches the second air outlet 113, the extension direction of the second guide section 220 changes relative to the first guide section 210, and the second guide section 220 extends in a direction closer to the axis of rotation of the fan blade to guide the mixed fluid.

[0075] In addition, at least a portion of the second guide section 220 is parallel to the rotation axis of the combined fan blade device 100. It is conceivable that the second guide section 220 can be parallel to the rotation axis of the fan blade as a whole, or as the second guide section 220 gradually bends relative to the first guide section 210, the portion of the second guide section 220 away from the first guide section 210 bends to be parallel to the rotation axis of the fan blade. Under the guidance of the second guide section 220, the mixed air flow flows in a direction parallel to the rotation axis of the fan blade. Under this setting, the air outlet device achieves the effect of axial air intake and axial air outlet. Compared with traditional axial flow fans, the air volume and air pressure of the air outlet device are increased at the same time. The air outlet device can be applied to electrical appliances with axial air outlet requirements, such as fans and hair dryers.

[0076] Furthermore, as shown in Figure 9, the combined air outlet device also includes a mounting seat 500, which is connected to the side of the base 400 away from the hub 110. The air guide cover 200 also includes a third guide section 230, which is connected to the end of the second guide section 220 away from the first air inlet 140. The third guide section 230 is arranged in a ring on the outside of the mounting seat 500. The third guide section 230 and part of the mounting seat 500 are parallel to the rotation axis of the combined fan blade device 100. The combination of the third guide section 230 and the mounting seat 500 guides the mixed airflow, extends the guiding distance of the mixed airflow in the axial direction, and enables the mixed airflow to flow out of the air guide cover 200 along the axial direction.

[0077] Specifically, referring to Figures 9 and 10, the mounting seat 500 includes a guide portion 510 and a mounting portion 520. The mounting portion 520 is located on the side of the base 400 away from the hub 110. The guide portion 510 is integrally connected to the outer edge of the mounting portion 520 away from the rotation axis and extends in a direction away from the base 400. The guide portion 510 is parallel to the rotation axis of the fan blade and is combined with the third guide section 230 to guide the mixed airflow. The mounting portion 520 is used to install the driving element 300. The driving element 300 can be an electric motor or a motor. The driving element 300 is fixed to the mounting portion 520. The output end of the driving element 300 is connected to the base 400 and provides power to the combined fan blade device 100 for the fan blade to rotate to form an airflow.

[0078] 9 to 11 , the combined air outlet device further includes a guide vane 600. A guide cavity 240 is formed between the third guide section 230 and the guide portion 510. The guide vane 600 is accommodated in the guide cavity 240. The guide vane 600 is connected between the third guide section 230 and the mounting seat 500. The guide vane 600 extends in a direction away from the base 400. The guide vane 600 is used to guide the mixed airflow entering the guide cavity 240 to improve the uniformity of the air outlet device.

[0079] A plurality of guide vanes 600 may be provided and evenly distributed on the periphery of the mounting portion 520. The guide vanes 600 may be provided as flat plates or spiral plates. The guide vanes 600 are connected to the third guide section 230 and the drainage portion 510 on both sides of the base 400 in the radial direction, respectively, to ensure the structural strength and connection stability of the guide vanes 600 and to avoid vibration and noise generation by the guide vanes 600.

[0080] While the embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, the present disclosure is not limited to the embodiments described above. Various modifications may be made within the scope of knowledge possessed by a person of ordinary skill in the art without departing from the spirit of the present disclosure. Furthermore, the embodiments of the present disclosure and the features within the embodiments may be combined with one another unless there is a conflict.

Claims

1. A combined fan blade device, comprising: A wheel hub (110), wherein a first air inlet (140) is formed on the outer side of an edge of a first end of the wheel hub (110), and a first air outlet (150) is formed on the outer side of an edge of a second end of the wheel hub (110); a centrifugal cavity (111) is provided inside the wheel hub (110); a second air inlet (112) is provided at the first end of the wheel hub (110); the first air inlet (140) surrounds the outer side of the second air inlet (112); a second air outlet (113) is provided at the second end of the wheel hub (110); the second air inlet (112) and the second air outlet (113) are both connected to the centrifugal cavity (111); and the wheel hub (110) gradually expands in a direction from the second air inlet (112) toward the second air outlet (113); A diagonal flow blade (120) connected to a side of the hub (110) away from the centrifugal chamber (111); and The centrifugal blade (130) is connected to the hub (110) and is located in the centrifugal cavity (111), and the rotation axis of the diagonal flow blade (120) coincides with the rotation axis of the centrifugal blade (130).

2. The combined fan blade device according to claim 1 further includes a connecting portion (170), wherein the centrifugal fan blade (130) is provided in plurality, and at least part of the centrifugal fan blade (130) is connected to the connecting portion (170) at one end away from the first air outlet (150).

3. The combined fan blade device according to claim 2, wherein the portion of the centrifugal fan blade (130) connected to the adapter (170) and the portion of the centrifugal fan blade (130) not connected to the adapter (170) are alternately arranged in an interval along the circumferential direction of the hub (110).

4. A combined fan blade device according to claim 2 or 3, wherein a plurality of the adapter parts (170) are provided, and the plurality of the adapter parts (170) are distributed at intervals, and in a plane perpendicular to the direction of the rotation axis of the centrifugal fan blade (130), the projection of the adapter part (170) is located outside the projection of the first end of the hub (110).

5. The combined fan blade device according to claim 4, wherein a plurality of the adapter portions (170) are evenly spaced along the circumferential direction of the hub (110).

6. A combined air outlet device comprising: The combined fan blade device according to any one of claims 1 to 5; A guide cover (200), wherein at least a portion of the combined fan blade device is disposed inside the guide cover (200); and A driving element (300) is connected to the combined fan blade device and is used to drive the combined fan blade device to rotate.

7. The combined air outlet device according to claim 6, wherein the area enclosed by the outer edge of the air deflector (200) and the first end of the hub (110) is the first air inlet (140), and the area enclosed by the outer edge of the air deflector (200) and the second end of the hub (110) is the first air outlet (150).

8. The combined air outlet device according to claim 6 or 7, further comprising a base (400), wherein the base (400) is connected to a side of the centrifugal fan blade (130) away from the second air inlet (112), and the base (400) is used to install the driving element (300).

9. The combined air outlet device according to claim 8, wherein an edge of the base (400) away from the rotation axis is flush with the second end of the hub (110) in the direction of the rotation axis.

10. A combined air outlet device according to claim 8 or 9, wherein the air guide cover (200) has a first guide section (210) and a second guide section (220), the first guide section (210) is arranged around the outer periphery of the hub (110), the second guide section (220) is arranged around the outer periphery of the base (400), and blocks the second air outlet (113) along the radial direction of the hub (110), the second guide section (220) is used to guide the airflow discharged from the first air outlet (150) and the second air outlet (113), and at least a portion of the second guide section (220) is parallel to the rotation axis.

11. The combined air outlet device according to claim 10, wherein the inner surface of the connection between the first guide section (210) and the second guide section (220) is a curved surface, and the curved surface gradually approaches the second air outlet (113) along the flow direction of the airflow.

12. The combined air outlet device according to claim 10 or 11 further includes a mounting seat (500), wherein the mounting seat (500) is connected to a side of the base (400) away from the hub (110), and the air guide cover (200) further includes a third guide section (230), wherein the third guide section (230) is connected to an end of the second guide section (220) away from the first air inlet (140), and the third guide section (230) is arranged on the outside of the mounting seat (500), and the third guide section (230) and a portion of the mounting seat (500) are parallel to the rotation axis.

13. A combined air outlet device according to claim 12, wherein the mounting seat (500) includes a drainage portion (510) and a mounting portion (520), the mounting portion (520) is connected to a side of the base (400) away from the hub (110), the drainage portion (510) is connected to an outer edge of the mounting portion (520) away from the rotation axis, and the drainage portion (510) is parallel to the rotation axis and extends in a direction away from the base (400).

14. The combined air outlet device according to claim 12 or 13, further comprising a guide vane (600), wherein a guide cavity (240) is formed between the third guide section (230) and the mounting seat (500), and the guide vane (600) is accommodated in the guide cavity (240) and connected between the third guide section (230) and the mounting seat (500).

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