Combined fan blade device and combined blowing device

Abstract

The present invention relates to a combined fan blade and a combined blowing device. The combined fan blade (100) comprises a hub (110), a first inlet (140) formed on an outer edge of a first end of the hub (110), a first outlet (150) formed on an outer edge of a second end of the hub (110), a centrifugal cavity (111) formed inside the hub (110), a second inlet (112) provided at the first end of the hub (110), the first inlet (140) surrounding the outside of the second inlet (112), a second outlet (113) provided at the second end of the hub (110), and a centrifugal cavity (111) formed inside the hub (110). The hub (110) includes a hub (110) that gradually expands along the second inlet (112) toward the second outlet (113), a mixed-flow fan blade (120) connected to the hub (110) on the side of the hub (110) that is far from the centrifugal cavity (111), and a centrifugal fan blade (130) connected to the hub (110) and located in the centrifugal cavity (111) and whose rotation axis overlaps with the mixed-flow fan blade (120). This combined fan blade can increase the amount of air inflow due to the blowing area of ​​the hub on the blowing side, thereby improving the air volume and wind pressure of the blowing device.

Description

Technical Field

[0001] This disclosure is based on a Chinese application with an application number of 202111639861.0 and a filing date of December 29, 2021, claims the priority of the said application, and the disclosure content of the said Chinese application is incorporated into this disclosure by reference in its entirety.

[0002] This disclosure relates to a combined fan blade device and a combined blowing device.

Background Art

[0003] The following description merely provides background information related to this disclosure and does not necessarily constitute prior art.

[0004] Conventional high-pressure and high-speed fans are generally mixed-flow fans. There is a hub in the center of the mixed-flow fan blades, and air can only enter from the outside of the hub. Therefore, an inefficient blowing area is generated in the mixed-flow fan, which affects the blowing volume of the mixed-flow fan. And the air forms a turbulent flow in this area, hindering the normal blowing of the mixed-flow fan and affecting the wind pressure and blowing volume of the mixed-flow fan.

Summary of the Invention

Problems to be Solved by the Invention

[0005] An object of this disclosure is to solve at least one of the technical problems existing in the prior art. Therefore, this disclosure proposes a combined fan blade device and a combined blowing device that can utilize the blowing area of the fan blade and improve the wind pressure and air volume of the blowing device.

Means for Solving the Problems

[0006] The combined fan blade device according to an embodiment of the first aspect of this disclosure is A hub, with a first air inlet formed at the outer edge of the first end of the hub, a first air outlet formed at the outer edge of the second end of the hub, having a centrifugal separation cavity inside the hub, a second air inlet provided at the first end of the hub, the first air inlet surrounding the outside of the second air inlet, a second air outlet provided at the second end of the hub, both the second air inlet and the second air outlet communicating with the centrifugal separation cavity, and the hub gradually expanding from the second air inlet towards the second air outlet, the hub, A diagonal flow fan blade connected to the side of the hub away from the centrifugal separation cavity of the hub, A centrifugal fan blade connected to the hub, located inside the centrifugal separation cavity, and having the same axis of rotation as the diagonal flow fan blade, including.

[0007] The combined fan blade device according to the embodiments of the present disclosure has at least the following beneficial effects.

[0008] In the embodiments of the present disclosure, having a second air inlet on the air inlet side of the hub and forming a first air inlet at the outer edge of the first end of the hub can utilize the air inlet area of the hub on the air inlet side and increase the air inflow rate. Since there is no turbulent flow on the air inlet side of the hub, it facilitates the air inflow, improves the operating efficiency of the air outlet device. Also, by generating two airflows respectively by the diagonal flow fan blade and the centrifugal fan blade and discharging the two airflows from the air outlet and then merging them, the air volume and air pressure of the air outlet device can be effectively improved.

[0009] According to some embodiments of the present disclosure, the combined fan blade device further includes an adapter part, a plurality of centrifugal fan blades are provided, and at least a part of the centrifugal fan blades has an end away from the first air outlet connected to the adapter part.

[0010] According to some embodiments of the present disclosure, the centrifugal fan blades connected to the adapter part and the centrifugal fan blades not connected to the adapter part are alternately provided at intervals along the circumferential direction of the hub.

[0011] 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 direction of the centrifugal fan blade, the projection of the adapter part is outside the projection of the first end of the hub.

[0012] According to some embodiments of the present disclosure, the plurality of adapter parts are provided at equal intervals along the circumferential direction of the hub.

[0013] The combined blowing device according to an embodiment of the second aspect of the present disclosure The combined fan blade device according to the embodiment of the first aspect, An air deflector, wherein at least a part of the combined fan blade device is inserted into the air deflector, and A drive element connected to the combined fan blade device and configured to rotationally drive the combined fan blade device.

[0014] The combined blowing device according to the embodiment of the present disclosure has at least the following effects.

[0015] In the embodiment of the present disclosure, the air deflector is provided to surround the outside of the hub, and a duct is formed between the air deflector and the hub, thereby utilizing the blowing area of the blowing device on the blowing side, and discharging the air flow generated by the centrifugal fan blade and the mixed-flow fan blade from the first blowing outlet and the second blowing outlet and then merging them, so as to improve the air volume and air pressure of the blowing device.

[0016] According to some embodiments of the present disclosure, the area surrounded by the outer edge of the first end of the air deflector and the hub is the first blowing inlet, and the area surrounded by the outer edge of the second end of the air deflector and the hub is the first blowing outlet.

[0017] According to some embodiments of the present disclosure, the combined blowing device further includes a base connected to the side away from the second blowing inlet of the centrifugal fan blade and to which the drive element is attached.

[0018] According to some embodiments of the present disclosure, for the base, an edge away from the rotation axis is flush with the second end of the hub in the rotation axis direction.

[0019] According to some embodiments of the present disclosure, the air deflector has a first air guiding stage and a second air guiding stage. The first air guiding stage is provided surrounding the outer circumference of the hub, and the second air guiding stage is provided surrounding the outer circumference of the base. The second air outlet is closed along the radial direction of the hub. The second air guiding stage guides the air flow discharged from the first air outlet and the second air outlet, and at least a part of the second air guiding stage is parallel to the rotation axis.

[0020] According to some embodiments of the present disclosure, the inner surface of the connection part between the first air guiding stage and the second air guiding stage is a curved surface, and the curved surface gradually approaches the second air outlet along the air flow direction.

[0021] According to some embodiments of the present disclosure, the combined blowing device further includes a mounting seat connected to the side of the base away from the hub. The air deflector further includes a third air guiding stage. The third air guiding stage is connected to the end of the second air guiding stage away from the first air inlet. The third air guiding stage is provided surrounding the outside of the mounting seat, and both the third air guiding stage and a part of the mounting seat are parallel to the rotation axis.

[0022] According to some embodiments of the present disclosure, the mounting seat includes a guiding part and a mounting part. The mounting part is connected to the side of the base away from the hub. The guiding part is connected to the outer edge of the mounting part away from the rotation axis. The guiding part is parallel to the rotation axis and extends away from the base.

[0023] According to some embodiments of the present disclosure, the combined blowing device further includes a guide vane. A flow guiding cavity is formed between the third air guiding stage and the mounting seat. The guide vane is Containment arranged in the flow guiding cavity and connected between the third air guiding stage and the mounting seat.

Brief Description of the Drawings

[0024]

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DETAILED DESCRIPTION OF THE INVENTION

[0025] Additional aspects and advantages of the present disclosure are given in part in the following description, some of which will be apparent from the following description or understood by the practice of the present disclosure. To more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the following briefly describes the drawings that need to be used in the description of the embodiments or the prior art. However, the drawings in the following description are only some embodiments of the present disclosure, and it is obvious to those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

[0026] The following details the embodiments of the present disclosure. The above embodiments are exemplarily shown in the drawings, and the same or similar reference numerals throughout the drawings indicate the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the drawings are exemplary and are only used for interpreting the present disclosure and should not be understood as limiting the present disclosure.

[0027] In addition, in the description of the present disclosure, when directions are described, for example, the directions or positional relationships indicated by "upper", "lower", "front", "rear", "left", "right", etc. are based on the directions or positional relationships shown in the drawings, and are only for facilitating the description of the present disclosure and simplifying the description, and do not indicate or imply that such devices or elements must have a specific direction or be configured and operate in a specific direction. Therefore, it should not be understood as limiting the present disclosure.

[0028] In the description of the present disclosure, several meanings mean one or more, multiple meanings mean two or more, and "greater than", "less than", "exceeding", etc. are understood as not including the number, and "above", "below", "within", etc. are understood as including the number. If "first", "second" are described, it is only for the purpose of distinguishing technical features and should not be understood as indicating or suggesting relative importance, or implicitly indicating the number of the indicated technical features, or implicitly indicating the sequence relationship of the indicated technical features.

[0029] In the description of the present disclosure, unless otherwise clearly defined, terms such as "provide", "attach", "connect", etc. should be understood in a broad sense, and those skilled in the art may reasonably determine the specific meaning of the above terms in the present disclosure with reference to the specific content of the technical solution.

[0030] In the description of the present disclosure, the description referring to terms such as "some embodiments", "exemplary embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described with reference to the embodiments or examples are included in at least some embodiments or examples of the present disclosure. In this specification, the exemplary descriptions of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

[0031] In an embodiment of the present disclosure, a combined fan blade device 100 is provided. This combined fan blade device 100 can be used in combination with an air deflector 200, providing individual ducts for each fan blade, facilitating the formation of an air flow within the duct 160 by the fan blades and the subsequent confluence of the air flows. Specifically, as shown in FIG. 1, the combined fan blade device 100 includes a hub 110, an axial-flow fan blade 120, and a centrifugal fan blade 130. As shown in FIG. 2, the air deflector 200 is placed outside the hub 110, a first inlet 140 is formed between the first end of the hub 110 and the air deflector 200, a first outlet 150 is formed between the second end of the hub 110 and the air deflector 200, and the gap between the air deflector 200 and the hub 110 serves as the duct 160 for the axial-flow fan blade 120 to form an air flow. A centrifugal separation cavity 111 is provided inside the hub 110, the centrifugal fan blade 130 is located within the centrifugal separation cavity 111 and is connected to the hub 110, and the axial-flow fan blade 120 is connected to the side of the hub 110 away from the centrifugal separation cavity 111. Thus, the axial-flow fan blade 120 and the centrifugal fan blade 130 are respectively provided inside and outside the hub 110. The hub 110, the axial-flow fan blade 120, the centrifugal fan blade 130, and the air deflector 200 have overlapping central axes.

[0032] A second inlet 112 is provided at the first end of the hub 110, and the first inlet 140 is provided surrounding the outside of the second inlet 112. A second outlet 113 is provided at the second end of the hub 110, and both the second inlet 112 and the second outlet 113 communicate with the centrifugal separation cavity 111.

[0033] As shown in FIG. 3, the hub 110 gradually expands from the second air inlet 112 toward the second air outlet 113. The axial flow fan blade 120 and the centrifugal fan blade 130 have overlapping rotation axes, and both of them overlap axially and are combined. When the combined fan blade device 100 is driven to rotate, the axial flow fan blade 120 and the centrifugal fan blade 130 rotate synchronously. External air enters the duct 160 formed by the air deflector 200 and the hub 110 from the first air inlet 140, and also enters the centrifugal separation cavity 111 from the second air inlet 112. The air becomes an air flow in conjunction with the rotation of the axial flow fan blade 120 and the centrifugal fan blade 130. Due to the pinning effect of the air flow, when the air flow in the centrifugal separation cavity 111 is discharged from the second air outlet 113, it flows out along the inner wall of the hub 110. In the case of the air flow in the duct 160, guided by the axial flow fan blade 120 and the air deflector, the air flow generated by the rotation of the axial flow fan blade 120 is discharged outward from the first air outlet 150. The air flows formed by the axial flow fan blade 120 and the centrifugal fan blade 130 are all blown outward toward the outside of the hub, and the air flows formed by both of them merge after being discharged from the air outlet. Since the air volume of the air flow formed by the axial flow fan blade 120 is large and the air pressure of the air flow formed by the centrifugal fan blade 130 is high, when these two air flows merge, the air volume and air pressure of the mixed air flow can be effectively improved.

[0034] The hub 110 has a first air inlet 140 on the blowing side. By combining with the air deflector 200, a second air inlet 112 is formed, thereby making use of the blowing area of the hub 110 on the blowing side and increasing the air inflow. Since there is no turbulent flow on the blowing side of the hub 110, it facilitates the air inflow, improves the operating efficiency of the blowing device, and generates two air flows respectively by the axial flow fan blade 120 and the centrifugal fan blade 130. By discharging the two air flows from the air outlet and then merging them, the air volume and air pressure of the blowing device can be effectively improved.

[0035] Note that a plurality of mixed-flow fan blades 120 and centrifugal fan blades 130 may be provided. The plurality of mixed-flow fan blades 120 are evenly distributed outside the hub 110, and the plurality of mixed-flow fan blades 120 are combined to guide the air in the duct 160. The plurality of centrifugal fan blades 130 are evenly distributed inside the hub 110, and the plurality of centrifugal fan blades 130 are combined to guide the air in the centrifugal separation cavity 111, thereby improving the blowing efficiency of the combined fan blade device 100.

[0036] The shapes of the mixed-flow fan blades 120 and the centrifugal fan blades 130 may be ordinary fan blade structures, and the hub 110 has a conical structure. Thereby, it becomes easy to guide the air obliquely. Due to the rotation of the mixed-flow fan blades 120, the air performs both centrifugal motion and axial flow motion, generating an oblique air flow. With the form of the hub 110 that gradually expands, the air entering the duct 160 from the axial direction receives the flow guidance by the mixed-flow fan blades 120 and is discharged from the radially outer periphery of the base 400. The flow direction of the air flow guided to the outside by the mixed-flow fan blades 120 becomes substantially parallel to the flow direction of the air flow guided to the outside by the centrifugal fan blades 130, facilitating the confluence of the air flows and avoiding the generation of turbulent flow due to the confluence of the air flows.

[0037] The mixed-flow fan blades 120 are inclined and connected to the outside of the hub 110, thereby increasing the effective width of the mixed-flow fan blades 120. The mixed-flow fan blades 120 may exhibit a spiral shape and be designed with a curved structure that conforms to the three-dimensional flow design.

[0038] As shown in FIG. 4, the combined fan blade device further includes an adapter portion 170, and at least a part of the centrifugal fan blade 130 has an end portion away from the first air outlet 150 connected to the adapter portion 170. The adapter portion 170 can be used to connect a drive element for rotationally driving the combined fan blade device or attach an adapter plate connected to the drive element. The adapter portion 170 is located within the centrifugal cavity 111, has a cylindrical shape, and may have mounting holes for connection to external elements. By providing the adapter portion 170 at the end of the centrifugal fan blade 130, while facilitating the combination of the combined fan blade device with other members, the simple structure and small occupied space of the adapter portion 170 enable the combined fan blade device to be manufactured by integral molding, reducing the processing cost of the combined fan blade device.

[0039] As shown in FIG. 4, one adapter portion 170 is provided and is located at the central portion of the centrifugal cavity 111, and a plurality of centrifugal fan blades 130 are provided. One end portion of a part of the centrifugal fan blades 130 is connected to the adapter portion 170, whereby the combined fan blade device can be connected to an external element via the adapter portion 170.

[0040] In some embodiments, the centrifugal fan blades 130 connected to the adapter portion 170 and the centrifugal fan blades 130 not connected to the adapter portion 170 are alternately provided at intervals along the circumferential direction of the hub 110, thereby ensuring the smoothness of the airflow and reducing the processing difficulty, and improving the blowing efficiency of the combined fan blade device.

[0041] As shown in FIG. 5, a plurality of adapter portions 170 may be provided. The plurality of adapter portions 170 are provided at intervals. The centers of the circumscribed circles of the plurality of adapter portions 170 are on the rotation axis. In a plane perpendicular to the rotation axis direction of the centrifugal fan blade 130, the projection of the adapter portion 170 is outside the projection of the first end of the hub 110. Thereby, the adapter portion 170 does not affect the flow of the airflow in the central region of the centrifugal separation cavity 111, the flow of the airflow becomes smoother, and the blowing efficiency of the combined fan blade device is improved.

[0042] In some embodiments, the plurality of adapter portions 170 are provided at equal intervals along the circumferential direction of the hub 110. The centrifugal fan blades 130 connected to the adapter portions 170 and the centrifugal fan blades 130 not connected to the adapter portions 170 are alternately provided at equal intervals along the circumferential direction of the hub 110. For example, four adapter portions 170, four centrifugal fan blades connected to the adapter portions 170, and four centrifugal fan blades not connected to the adapter portions 170 are all provided. The adjacent centrifugal fan blades 130 are evenly distributed at 45° along the circumferential direction. In this embodiment, by providing the two types of centrifugal fan blades 130 at equal intervals, the smoothness of the airflow flow is improved, the processing difficulty is reduced, and the blowing efficiency and blowing stability of the combined fan blade device are improved.

[0043] In some embodiments, the mixed-flow fan blade 120 is located within the duct 160 formed by the hub 110 and the air deflector 200. One side of the mixed-flow fan blade 120 is connected to the hub 110, and there is a gap between the other side and the air deflector 200. In this way, the mixed-flow fan blade 120 can rotate relative to the air deflector 200. When the width of the mixed-flow fan blade 120 gradually decreases towards the first outlet 150 and the gap between the mixed-flow fan blade 120 and the air deflector 200 is constant, the width of the duct 160 formed by the hub 110 and the air deflector 200 also gradually decreases. The area surrounded by the first outlet 150 is smaller than the area surrounded by the first inlet 140. When air enters the duct 160 from the first inlet 140, as the width of the duct 160 decreases, the pressure of the air flow continuously increases, thereby increasing the wind pressure of the air flow by the mixed-flow fan blade 120.

[0044] Moreover, both sides of the centrifugal fan blade 130 are respectively connected to the hub 110 and the base 400, and the plurality of centrifugal fan blades 130 are evenly distributed around the rotation axis. The air that enters the centrifugal separation cavity 111 from the second inlet 112 flows from the central part of the centrifugal separation cavity 111 along the radial direction of the base 400 due to the rotation of the centrifugal fan blade 130 and is discharged from the second outlet 113 at the outer edge of the base 400. Since the hub 110 gradually expands outward along the flow direction of the air flow, to facilitate the guiding of the air by the centrifugal fan blade 130 and increase the wind pressure of the air flow, the width of the centrifugal fan blade 130 gradually decreases from the center towards the second outlet 113. The width of the centrifugal fan blade 130 refers to the distance of the centrifugal fan blade 130 in the rotation axis direction. Thereby, the gap between the hub 110 and the base 400 gradually decreases from the center towards the second outlet 113, and the wind pressure of the centrifugal air flow effectively increases.

[0045] As shown in FIG. 6, in an embodiment of the present disclosure, a combined blowing device is further provided. This combined blowing device includes the above-described combined fan blade device 100, and further includes an air deflector 200 and a driving element 300. At least a part of the combined fan blade device 100 is inserted into the air deflector 200. The air deflector 200 is provided to surround the outside of the hub 110 and forms a duct 160 with the hub 110. The gap between the air deflector 200 and the first end of the hub 110 becomes a first air inlet 140. The first air inlet 140 is provided to surround the outer periphery of the second air inlet 112. Thereby, the blowing area of the blowing device on the blowing side is utilized. The driving element 300 is connected to the combined fan blade device 100 and rotationally drives the combined fan blade device 100. The centrifugal fan blade 130 and the mixed-flow fan blade 120 rotate synchronously. The air flow generated by their rotation is discharged from the first air outlet 150 and the second air outlet 113 and then merges. In this way, the air volume and air pressure of the blowing device are improved.

[0046] The combined blowing device further includes a base 400. The base 400 is provided close to the second end of the hub 110, is spaced apart from the hub 110, is connected to the side of the centrifugal fan blade 130 away from the second air inlet 112, and is used for mounting the driving element 300. The base 400 restricts the blowing area of the second air outlet 113, guides the air flow in the centrifugal separation cavity 111, enables the air flow generated by the centrifugal fan blade 130 to be discharged toward the outside of the hub 110, and facilitates the merging with the air flow generated by the mixed-flow fan blade 120.

[0047] The base 400 is connected to the centrifugal fan blade 130 by adhesion or welding, or is connected to the centrifugal fan blade 130 by removable means. In some embodiments, as shown in FIG. 7, the base 400 is plate-shaped and has an assembly hole that fits with the adapter portion 170. The adapter portion 170 is connected to the base 400 through screwing, which is more advantageous for the assembly of the combined fan blade device and the base 400 and the maintenance after the base 400 and the combined fan blade device than connection methods such as adhesion and welding.

[0048] A protrusion 410 for attaching the output shaft of the drive element 300 is provided at the center of the base 400. The protrusion 410 is between a plurality of adapter portions 170 Containment It is possible. Thereby, the drive element 300 is easily connected to the combined fan blade device, and when the drive element 300 is connected to the base 400, the entire combined fan blade device can be rotationally driven by the drive element 300.

[0049] In the base 400, the edge away from the rotation axis may be recessed toward the rotation axis more than the edge of the hub 110, or the edge of the base 400 may be flush with the edge of the second end of the hub 110 in the rotation axis direction. As shown in FIG. 6, the end of the air deflector 200 close to the base 400 and the end of the hub 110 close to the base 400 are also flush with the edge of the base 400. In such a configuration, the airflow discharged from the first outlet 150 is discharged outward along the radial direction of the base 400, the airflow discharged from the second outlet 113 is discharged outward along the radial direction of the base 400, and the mixed airflow formed by the confluence of both of these flows outward on the outside of the base 400. In this way, the effects of axial blowing and circumferential blowing by the blowing device are achieved, and both the air volume and the air pressure of the blowing device are improved compared with a conventional centrifugal fan. The blowing device is suitable for electrical appliances that require circumferential blowing, such as vacuum cleaners and cleaning robots.

[0050] Both the hub 110 and the air deflector 200 are inclined towards the base 400, and the airflow discharged from the second outlet 113 still tends to flow towards the base 400, which is beneficial for the confluence of the airflow discharged from the second outlet 113 and the airflow discharged from the first outlet 150. By making the sides of the hub 110 close to the first outlet 150 and the air deflector 200 close to the second outlet 113 parallel to the base 400 as much as possible, and making the airflow discharged from the first outlet 150 and the airflow discharged from the second outlet 113 merge in the same direction, the possibility of turbulence caused by the confluence of the airflow is reduced.

[0051] As shown in FIG. 8, the air deflector 200 has a first flow guiding section 210 and a second flow guiding section 220. The first flow guiding section 210 is provided surrounding the outer periphery of the hub 110, forming the outside of the hub 110 and the duct 160. The second flow guiding section 220 is provided surrounding the outer periphery of the base 400 and has a gap with the outer edge of the base 400. The second flow guiding section 220 guides the airflow discharged from the first outlet 150 and the second outlet 113. The airflow discharged from the first outlet 150 and the airflow discharged from the second outlet 113 merge to form a mixed airflow. Due to the radial closure by the second flow guiding section 220, the mixed airflow no longer flows radially towards the base 400 and continues to flow away from the blowing port under the guidance of the second flow guiding section 220.

[0052] To avoid noise generation at both connection parts due to the bending angle of the first flow guiding section 210 with respect to the second flow guiding section 220 being too large, the second flow guiding section 220 may be configured such that the opening gradually increases away from the blowing port. In this way, the second flow guiding section 220 is inclined at a predetermined angle with respect to the rotation axis of the fan blade, reducing the bending angle of the second flow guiding section 220 with respect to the first flow guiding section 210.

[0053] Furthermore, the inner surface of the connection part between the first air guiding section 210 and the second air guiding section 220 is a curved surface, and this curved surface gradually approaches the second air outlet 113 along the flow direction of the air flow. By making the connection surface between the first air guiding section 210 and the second air guiding section 220 a curved surface, it is possible to avoid the air flow gathering at both connection parts and generating noise, and also prevent an increase in the resistance of the air flow at the connection part, so as to make the air flow smoothly flow from the first air guiding section 210 to the second air guiding section 220. Since the curved surface gradually approaches the second air outlet 113, the extending direction of the second air guiding section 220 changes with respect to the first air guiding section 210. In order to guide the mixed fluid, the second air guiding section 220 extends so as to approach the rotation axis of the fan blade.

[0054] Also, at least a part of the second air guiding section 220 is parallel to the rotation axis of the combined fan blade device 100. The second air guiding section 220 is parallel to the rotation axis of the fan blade throughout, or as the second air guiding section 220 is gradually bent with respect to the first air guiding section 210, the part of the second air guiding section 220 away from the first air guiding section 210 becomes parallel to the rotation axis of the fan blade. With the guidance of the second air guiding section 220, the mixed air flow flows in a direction parallel to the rotation axis of the fan blade. In such a configuration, the effects of axial blowing in and axial blowing out by the blowing device are achieved, and compared with the conventional axial flow fan, both the air volume and the air pressure of the blowing device are improved. The blowing device is suitable for electrical appliances that require axial blowing, such as a fan or a hair dryer.

[0055] Furthermore, as shown in FIG. 9, the combined blowing device further includes a mounting seat 500 connected to the side away from the hub 110 of the base 400. The air deflector 200 further includes a third air guiding section 230. The third air guiding section 230 is connected to the end away from the first air inlet 140 of the second air guiding section 220. The third air guiding section 230 is provided to surround the outside of the mounting seat 500. A part of the third air guiding section 230 and the mounting seat 500 are all parallel to the rotation axis of the combined fan blade device 100. By combining the third air guiding section 230 and the mounting seat 500 to guide the mixed air flow, the axial guiding distance for the mixed air flow is increased, enabling the mixed air flow to flow out from the air deflector 200 along the axial direction.

[0056] Specifically, referring to FIGS. 9 and 10, the mounting seat 500 includes a guiding part 510 and a mounting part 520. The mounting part 520 is located on the side away from the hub 110 of the base 400. The guiding part 510 is integrally connected to the outer edge away from the rotation axis of the mounting part 520 and extends away from the base 400. The guiding part 510 is parallel to the rotation axis of the fan blade and guides the mixed air flow in combination with the third air guiding section 230. The mounting part 520 is used to mount the driving element 300, and the driving element 300 may be an electric motor or a motor. The driving element 300 is fixed to the mounting part 520, and the output end of the driving element 300 is connected to the base 400 to supply power to the combined fan blade device 100 so that the fan blade rotates to form an air flow.

[0057] Referring to FIGS. 9 to 11, the combined blowing device further includes a guide vane 600. A flow guiding cavity 240 is formed between the third air guiding section 230 and the guiding part 510. The guide vane 600 is Containment arranged in the flow guiding cavity 240. The guide vane 600 is connected between the third air guiding section 230 and the mounting seat 500. The guide vane 600 extends away from the base 400. The guide vane 600 guides the mixed air flow entering the flow guiding cavity 240 to improve the uniformity of the blowing by the blowing device.

[0058] The guide vanes 600 may be provided in a plurality of numbers evenly on the outer periphery of the mounting portion 520, and may be configured as flat plates or spiral plates. Both sides of the guide vane 600 in the radial direction of the base 400 are respectively connected to the third flow guiding stage 230 and the guide portion 510, whereby the structural strength and connection stability of the guide vane 600 are ensured, and the noise caused by the vibration of the guide vane 600 is avoided.

[0059] As described above, the embodiments of the present disclosure have been described in detail with reference to the drawings. However, the present disclosure is not limited to the above embodiments, and various changes may be made without departing from the spirit of the present disclosure within the scope of knowledge possessed by those skilled in the art. Furthermore, the embodiments of the present disclosure and the features of the embodiments may be combined with each other without conflict.

Description of Reference Numerals

[0060] 100 Combined fan blade device 110 Hub 111 Centrifugal separation cavity 112 Second air inlet 113 Second air outlet 120 Mixed-flow fan blade 130 Centrifugal fan blade 140 First air inlet 150 First air outlet 160 Duct 170 Adapter portion 200 Air deflector 210 First flow guiding stage 220 Second flow guiding stage 230 Third flow guiding stage 240 Flow guiding cavity 300 Driving element 400 Base 410 Protrusion 500 Mounting seat 510 Guide portion 520 Mounting portion 600 Guide vane

Claims

1. A combined fan blade device, comprising: a hub (110), wherein a first air inlet (140) is formed at an outer edge of a first end of the hub (110), a first air outlet (150) is formed at an outer edge of a second end of the hub (110), a centrifugal separation cavity (111) is provided inside the hub (110), a second air inlet (112) is provided at the first end of the hub (110), the first air inlet (140) surrounds 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) communicate with the centrifugal separation cavity (111), and the hub (110) gradually expands from the second air inlet (112) towards the second air outlet (113), the hub (110); a mixed-flow fan blade (120) connected to a side of the centrifugal separation cavity (111) of the hub (110) away from the centrifugal separation cavity; a centrifugal fan blade (130) connected to the hub (110), located in the centrifugal separation cavity (111), and having a rotation axis overlapping with that of the mixed-flow fan blade (120), the combined fan blade device further comprising an adapter portion (170), wherein a plurality of the centrifugal fan blades (130) are provided, and at least a part of the centrifugal fan blades (130) has an end away from the first air outlet (150) connected to the adapter portion (170); The centrifugal fan blades (130) connected to the adapter portion (170) and the centrifugal fan blades (130) not connected to the adapter portion (170) are alternately provided at intervals along the circumferential direction of the hub (110).

2. The combined fan blade device according to claim 1, wherein a plurality of the adapter portions (170) are provided, the plurality of the adapter portions (170) are distributed at intervals, and in a plane perpendicular to the rotation axis direction of the centrifugal fan blade (130), a projection of the adapter portion (170) is outside a projection of the first end of the hub (110).

3. A combined air outlet device, comprising: the combined fan blade device according to claim 1 or 2; ​ An air deflector (200), at least a part of the combined fan blade device being inserted inside the air deflector (200); A drive element (300) connected to the combined fan blade device and rotationally driving the combined fan blade device; A base (400) connected to a side away from the second air inlet (112) of the centrifugal fan blade (130), the drive element (300) being attached thereto; A combined blowing device including the above.

4. The region surrounded by the air deflector (200) and the outer edge of the first end of the hub (110) is the first air inlet (140), and the region surrounded by the air deflector (200) and the outer edge of the second end of the hub (110) is the first air outlet (150). The combined blowing device according to claim 3.

5. The base (400), the edge away from the rotation axis is flush with the second end of the hub (110) in the rotation axis direction. The combined blowing device according to claim 3.

6. The air deflector (200) has a first flow guiding stage (210) and a second flow guiding stage (220). The first flow guiding stage (210) is provided surrounding the outer circumference of the hub (110), and the second flow guiding stage (220) is provided surrounding the outer circumference of the base (400). The second air outlet (113) is closed along the radial direction of the hub (110). The second flow guiding stage (220) guides the air flow discharged from the first air outlet (150) and the second air outlet (113). At least a part of the second flow guiding stage (220) is parallel to the rotation axis. The combined blowing device according to claim 3.

7. The inner surface of the connection part between the first flow guiding stage (210) and the second flow guiding stage (220) is a curved surface, and the curved surface gradually approaches the second air outlet (113) along the flow direction of the air flow. The combined blowing device according to claim 6.

8. Further comprising an attachment seat (500) connected to a side of the base (400) away from the hub (110), the air deflector (200) further comprising a third air guiding section (230), the third air guiding section (230) being connected to an end of the second air guiding section (220) away from the first air inlet (140), the third air guiding section (230) being provided to surround the outside of the attachment seat (500), and a part of the third air guiding section (230) and the attachment seat (500) both being parallel to the rotation axis, the combined blowing device according to claim 6.

9. The attachment seat (500) includes a guide portion (510) and an attachment portion (520), the attachment portion (520) being connected to a side of the base (400) away from the hub (110), the guide portion (510) being connected to an outer edge of the attachment portion (520) away from the rotation axis, the guide portion (510) being parallel to the rotation axis and extending away from the base (400), the combined blowing device according to claim 8.

10. Further comprising a guide vane (600), a flow guiding cavity (240) being formed between the third air guiding section (230) and the attachment seat (500), the guide vane (600) being accommodated in the flow guiding cavity (240) and connected between the third air guiding section (230) and the attachment seat (500), the combined blowing device according to claim 8.

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