Volute tongue structure, cooling fan and electronic equipment

Abstract

The embodiment of the utility model provides a volute tongue structure, a cooling fan and electronic equipment, and belongs to the technical field of cooling equipment.The volute tongue structure comprises a volute tongue body and at least one turbulent flow part, and the volute tongue body is provided with a flow guide face used for guiding airflow output and a windward face arranged opposite to an impeller of the cooling fan; and at least one turbulent flow part is arranged on the volute tongue body, is positioned between the flow guide surface and the windward surface, and is used for dividing at least part of airflow of the cooling fan. According to the volute tongue structure, the airflow of the cooling fan is divided through the arranged turbulent flow part, vortexes generated in the cooling fan can be reduced, and therefore noise of the cooling fan is reduced, and the use experience of a user is improved.

Description

Technical Field

[0001] The present application relates to the technical field of heat dissipation equipment, and in particular to a volute tongue structure, a heat dissipation fan and an electronic device. Background Art

[0002] The cooling fan is often designed with a "tongue-shaped" structure at the air flow outlet of the volute, which is called the volute tongue. The function of the volute tongue is to prevent the air flow at the outlet from circulating back into the volute. The design of the volute tongue directly affects the performance of the cooling fan.

[0003] In related technologies, a negative pressure flow field is easily generated when the volute tongue of a cooling fan separates the airflow, and a large backflow of airflow occurs at the outlet position, causing the airflow to periodically impact the volute tongue when the blades of the cooling fan rotate, generating a large noise and affecting the user experience. Utility Model Content

[0004] The embodiments of the present application provide a volute tongue structure, a heat dissipation fan, and an electronic device, which are used to improve the technical problem of high noise of the heat dissipation fan in the related art.

[0005] In a first aspect, an embodiment of the present application provides a snail tongue structure, comprising:

[0006] The volute tongue body has a guide surface for guiding the airflow output and a windward surface arranged opposite to the impeller of the cooling fan;

[0007] At least one spoiler is provided on the volute tongue body, and the spoiler is located between the guide surface and the windward surface, and the spoiler is used to divide at least part of the airflow of the cooling fan.

[0008] In a possible implementation manner, the volute tongue body further has a transition surface for connecting the flow guide surface and the windward surface, and the spoiler is located on the transition surface.

[0009] In a possible implementation, there are multiple spoilers, and the spoilers are evenly spaced apart.

[0010] In a possible implementation, the spoiler is a rectangular protrusion, an arc-shaped protrusion, or a wedge-shaped protrusion.

[0011] In a second aspect, an embodiment of the present application further provides a heat dissipation fan, comprising the volute tongue structure as described in any one of the above items, further comprising:

[0012] A volute, with an impeller mounted therein, and an air duct for guiding air flow formed between the volute and the impeller;

[0013] At least one guide part is arranged in the air duct of the volute, and the guide part is located on the side of the impeller away from the windward surface and extends along the air conveying direction to guide the air flow in the air duct to output from the volute.

[0014] In a possible implementation, the guide part has a plurality of guide parts.

[0015] The plurality of guide parts are located on the same circular arc contour line as the spoiler.

[0016] In a possible implementation, the axis of the at least one guide part is tangent to the outer peripheral contour line of the impeller, and the guide part close to the air duct outlet along the air conveying direction tends to be parallel to the guide surface.

[0017] In a possible implementation, the thickness of the middle part of the guide part gradually decreases towards both sides along the axis direction of the guide part.

[0018] In a possible implementation, the volute comprises a frame body and cover bodies arranged on both sides of the frame body, and the two ends of the guide part are connected with a cover body respectively to support the cover body.

[0019] In a third aspect, the embodiments of the present application further provide an electronic device, comprising a device body and the heat dissipation fan.

[0020] As can be seen from the above description, the volute tongue structure, the heat dissipation fan and the electronic device provided by the embodiments of the present application can optimize the distribution of the air flow and the flow path, avoid the generation of negative pressure flow field when the volute separates the air flow, and reduce the noise of the heat dissipation fan, by arranging at least one spoiler on the volute body of the volute tongue structure, guiding part of the air flow of the heat dissipation fan to output from the heat dissipation fan through the guide surface, and blocking the other part of the air flow by the spoiler when the air flow circulates internally through the windward surface. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings, which are incorporated into and form a part of the specification, illustrate one embodiment consistent with the present application and, together with the description, serve to explain the principles of the application.

[0022] Figure 1 FIG. 1 is a schematic view of the internal structure of the heat dissipation fan in the embodiments of the present application;

[0023] Figure 2 FIG. 2 is a schematic view of the volute tongue structure in the embodiments of the present application; Figure 1 FIG. 3 is a schematic view of the structure of the volute tongue structure and the guide part in the embodiments of the present application;

[0024] Figure 3 FIG. 4 is an enlarged view of the local structure of the volute tongue structure in the embodiments of the present application; Figure 1

[0025] ​Figure 4 For Figure 1 Structure diagram of the guide part and the volute tongue structure in another embodiment;

[0026] Figure 5 Structure diagram of the volute tongue structure in an example embodiment;

[0027] Figure 6 Structure diagram of the volute tongue structure in an example embodiment;

[0028] Figure 7 Structure diagram of the volute tongue structure in an example embodiment;

[0029] Figure 8 Structure diagram of the volute tongue structure in an example embodiment.

[0030] The specific embodiments of the present application have been shown by the above-mentioned drawings, and will be described in more detail hereinafter. These drawings and the written description are not intended to restrict the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments.

[0031] Explanation of Reference Signs

[0032] 100-volute tongue body; 101-guide surface; 102-windward surface; 103-transition surface;

[0033] 200-turbulence part;

[0034] 300-volute; 301-impeller; 302-air duct; 303-guide part. DETAILED DESCRIPTION

[0035] The exemplary embodiments will be described in detail herein with reference to the attached drawings. In the following description, the same numbers are used to indicate the same elements throughout the several views. The following detailed description is not intended to restrict the scope of the present application, but to explain the exemplary embodiments in connection with the drawings.

[0036] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", and "linking" should be interpreted in a broad sense, for example, they can be fixed connection, indirect connection through an intermediate medium, or internal connection of two elements or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0037] In addition, the terms "comprises" and "having" and any variations thereof are intended to cover a non-exclusive inclusion. For example, a process, method, system, product or apparatus that includes a series of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, product or apparatus.

[0038] A centrifugal fan is a fan that draws air from the center of the fan through a rotating impeller and uses centrifugal force to accelerate and discharge the air in a radial direction. This design enables centrifugal fans to efficiently deliver air at higher pressures.

[0039] In the related art, the volute structure in the centrifugal fan separates the airflow. After most of the airflow is discharged from the centrifugal fan, a small part of the airflow is re-entered into the centrifugal fan for the next circulation. However, a negative pressure area is easily formed near the air duct outlet near the volute tongue structure, and this position is also more prone to vortex backflow problems due to the separation of the airflow. Especially in the working scenario of high-pressure and high-speed airflow, the vortex and negative pressure will cause the overall noise of the fan to be relatively loud, affecting the user experience.

[0040] Figure 1 A schematic diagram of a portion of the structure of the heat dissipation fan provided in an embodiment of the present application is shown in FIG. Figure 1 As shown, the heat dissipation fan of the present application is mainly improved by improving the volute tongue structure, and at least one spoiler 200 is set on the volute tongue body 100. The spoiler 200 is used to divide the airflow when it comes into contact with the airflow, reduce the formation of vortexes, and optimize the flow path of the airflow, thereby reducing the collision impact between the airflow and the volute tongue structure and reducing noise.

[0041] The following specific embodiments are used to describe in detail the technical solution of the present application and how the technical solution of the present application solves the above technical problems. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments.

[0042] The snail tongue structure of the embodiment of the present application is described below with reference to the accompanying drawings.

[0043] like Figure 1 and Figure 2 As shown, in the embodiment of the present application, the volute tongue structure includes a volute tongue body 100 and at least one spoiler 200. The volute tongue body 100 has a guide surface 101 for guiding airflow output, and a windward surface 102 arranged opposite to the impeller 301 of the cooling fan; at least one spoiler 200 is provided on the volute tongue body 100, and the spoiler 200 is located between the guide surface 101 and the windward surface 102. The spoiler 200 is used to divide at least part of the airflow of the cooling fan.

[0044] Thus, the flow guide surface 101 on the volute tongue body 100 guides the airflow to be output from the cooling fan, the windward surface 102 of the volute tongue body 100 forms an air flow conveying air duct 302 with the impeller 301 of the cooling fan, a small part of the airflow is circulated when the windward surface 102 is contacted, the airflow is divided and disturbed by the spoiler 200 on the volute tongue body 100, so that vortex is avoided at this position, and negative pressure is avoided in this area due to high-speed airflow, the distribution and flow path of the airflow are optimized, and the noise of the cooling fan is reduced.

[0045] In the embodiment of the present application, the cooling fan can be applied to related fields and devices requiring centrifugal fans, for example, air conditioning equipment, notebook computers or desktop computers, air purifiers, vacuum cleaners, respirators, air purifiers, etc. The actual application scenarios of the cooling fan are not absolutely limited.

[0046] As shown in Figure 2 and Figure 3 , the volute tongue structure of the volute tongue body 100 is arranged in the volute 300 and is close to the air duct 302 outlet of the impeller 301 of the cooling fan, so that Figure 2 as an example, Figure 2 , the movement direction of the airflow is counterclockwise, that is, most of the airflow is driven counterclockwise by the impeller 301 to be output from the volute 300, and a small part of the airflow reenters the volute 300 after passing through the volute tongue body 100 to be circulated subsequently.

[0047] Generally, the volute tongue body 100 and the volute 300 are designed in one piece, for example, by one-piece stamping or one-piece casting, the volute tongue and the volute 300 are made of metal or high-strength plastic material to ensure the overall structural strength of the cooling fan. Of course, the volute tongue body 100 and the volute 300 can be designed in a split type, for example, the volute tongue body 100 is connected inside the volute 300 by clamping or bolt fixing.

[0048] Figure 2 is a structural schematic view of the volute 300 hidden by a side cover body in the embodiment of the present application, Figure 3 is an enlarged view of the local structure of the volute tongue structure in the embodiment of the present application. Figure 3 In the embodiment of the present application, the volute tongue body 100 further includes a transition surface 103 for connecting the flow guide surface 101 and the windward surface 102, and at least one spoiler 200 is arranged on the transition surface 103.

[0049] In the above embodiment, the transition surface 103 is used to guide the transition of the flow guide surface 101 and the windward surface 102, and preferably, the transition surface 103 is a circular arc surface, and the flow guide surface 101 and the windward surface 102 form a rounded transition through the transition surface 103. This arrangement can make the separation and transition of the airflow at the junction of the flow guide surface 101 and the windward surface 102 more smooth, and reduce the noise generated by the impact collision of the airflow at this position.

[0050] Since the spoiler 200 is provided on the transition surface 103 and the guide surface 101, the airflow in the volute 300 is separated and divided into turbulent flow when passing through the transition surface 103 and the guide surface 101, thereby preventing the airflow from generating vortices at the transition surface 103 and the windward surface 102.

[0051] like Figures 5 to 8 As shown, in the embodiment of the present application, there are multiple spoilers 200, and the multiple spoilers 200 are evenly spaced. The multiple spoilers 200 can form a multi-level spoiler effect, so that the passing airflow is divided by multiple spoilers, further enhancing the spoiler effect.

[0052] Furthermore, the spoiler 200 is a rectangular, arc-shaped or wedge-shaped groove; or, the spoiler 200 is a rectangular, arc-shaped or wedge-shaped protrusion.

[0053] Generally, the shapes of the spoilers 200 can be combined with each other, and the positions of the spoilers 200 on the transition surface 103 and the windward surface 102 can be combined. The spoilers 200 of the embodiments of the present application are exemplified below with reference to the accompanying drawings.

[0054] like Figure 3 As shown, Figure 3 In the figure, the spoiler 200 is an arc-shaped groove, and the spoiler 200 is arranged on the side of the windward surface 102 of the volute tongue body 100 close to the transition surface 103. As a result, the airflow in the volute 300 is guided and divided by the spoiler 200 when it hits the windward surface 102, thereby avoiding the generation of vortex and negative pressure flow field in the airflow here.

[0055] like Figure 5 As shown, Figure 5 In the embodiment, the spoiler 200 is a plurality of adjacently arranged arc-shaped protrusions. Since the spoilers 200 are arranged adjacent to each other, the plurality of spoilers 200 form an uneven multi-step arc tooth shape. In addition, a portion of the plurality of spoilers 200 is arranged on the transition surface 103, and the other portion extends along the side wall of the snail tongue body 100 to the windward surface 102, thereby further enhancing the spoiler effect on the airflow.

[0056] like Figure 6 As shown, Figure 6 In the figure, the spoiler 200 is a plurality of adjacently arranged wedge-shaped grooves. Since the spoilers 200 are arranged adjacent to each other, the plurality of spoilers 200 form an uneven multi-step wedge-shaped tooth shape. The plurality of spoilers 200 are all arranged on the transition surface 103, thereby further enhancing the spoiler effect on the airflow.

[0057] like Figure 7 As shown, Figure 7In the specific embodiment, the turbulence portions 200 are rectangular protrusions arranged adjacently, and the turbulence portions 200 form a concave-convex stepped rectangular tooth shape due to the adjacently arranged turbulence portions 200. The turbulence portions 200 are arranged on the transition surface 103, thereby further enhancing the turbulence effect on the airflow.

[0058] Similarly, Figure 8 In the specific embodiment, the turbulence portions 200 include wedge-shaped grooves and circular-arc grooves, and the turbulence portions 200 are arranged on the transition surface 103. In this embodiment, the shape of the turbulence portions 200 is not absolutely limited, as long as the turbulence portions 200 can play a turbulence effect when impacted by the airflow.

[0059] Based on the same design concept, the specific embodiment of the present application further provides a cooling fan including the volute tongue structure in any of the above embodiments. Since the cooling fan includes the volute tongue structure in any of the above embodiments, the cooling fan also has all the advantages of the volute tongue structure.

[0060] As Figure 2 and Figure 4 shown, in the specific embodiment, the cooling fan includes a volute 300 and at least one guide portion 303. The volute 300 is internally provided with an impeller 301, and the volute 300 and the impeller 301 form an air duct 302 for guiding the airflow. The at least one guide portion 303 is arranged in the air duct 302 of the volute 300, and the guide portion 303 is located on the side of the impeller 301 away from the windward surface 102. The guide portion 303 extends along the airflow conveying direction to guide the airflow in the air duct 302 to output the volute 300.

[0061] As can be seen from the above description, the cooling fan in the specific embodiment uses the guide portion 303 to guide the airflow through the air duct 302. The guide portion 303 and the volute tongue structure jointly optimize the airflow flow path, so that the airflow is more smoothly output from the volute 300, the impact of the airflow on the volute body 100 is reduced, thereby further reducing the noise of the cooling fan and enhancing the user experience.

[0062] In addition, since the guide portion 303 and the volute tongue structure jointly optimize the airflow flow path in the volute 300, the cooling fan can provide better cooling performance under the same power consumption, which is conducive to improving the cooling efficiency of the cooling fan.

[0063] Specifically, the impeller 301 is generally composed of a plurality of blades, the shape of the blades can be inclined, and the air flow size and pressure output of the heat dissipation fan are improved by adjusting the shape and angle of the blades. The blades are installed on a central shaft, and the central shaft is driven to rotate by the output shaft of the motor, so that the blades rotate synchronously in the volute 300. The centrifugal force generated by the rotating plate of the impeller 301 sucks air from the center of the fan and accelerates the air to be discharged in the radial direction. Due to the arrangement of the volute 300, the discharged air is guided to be discharged from the heat dissipation fan along the air duct 302 and the guide part 303 of the volute 300.

[0064] As shown in Figure 2 , in the embodiment of the present application, the air duct 302 refers to the air flow channel formed between the outer peripheral contour line of the impeller 301 and the inner side wall of the volute 300. The air flow sucked by the impeller 301 is discharged through the air duct 302. Exemplarily, the guide part 303 has a plurality of guide parts 303 located on the same circular arc contour line as the spoiler 200.

[0065] Since the impeller 301 is driven to rotate by the central shaft, the plurality of guide parts 303 are located on the same circular arc contour line as the spoiler 200, which can more accurately guide the air flow of the air duct 302 to be discharged from the heat dissipation fan along the circumferential direction, reduce the impact of the air flow on the volute 300 and the volute tongue structure, and reduce the unnecessary loss of the air flow.

[0066] It should be noted that the circular arc contour line is generally a part of the circular arc line of a standard circle. This design is based on the fact that the air duct 302 in the volute 300 is approximately circular. The shape of the circular arc contour line can be adjusted and modified according to the shape of the air duct 302 of the volute 300.

[0067] As an alternative embodiment, the air duct 302 in the volute 300 has other shapes, such as an approximately elliptical shape. Correspondingly, the circular arc contour line adopts a part of the circular arc line of an ellipse, as long as the guide part 303 and the spoiler 200 together guide the air flow to be discharged more smoothly from the heat dissipation fan.

[0068] The plurality of guide parts 303 are located in the air duct 302 of the volute 300. Along the axis direction of the guide part 303, the thickness of the middle part of the guide part 303 gradually decreases to both sides.

[0069] Specifically, the shape of the guide part 303 refers to the streamline design, for example, the cross-sectional shape of the guide part 303 is a flat ellipse or a willow strip shape, or the overall shape of the guide part is a cylindrical shape or a conical shape. The guide part 303 has a smooth curve, and the air flow can be guided to be discharged from the heat dissipation fan along the curve of the guide part 303. The thickness of the middle part of the guide part 303 gradually decreases to both sides, and the gradually changing curve can avoid sudden changes of the air flow in the air duct 302, thereby reducing the resistance and noise of the air flow as much as possible.

[0070] Of course, the shape of the guide portion 303 can also be set to other shapes. In some alternative embodiments, the shape of the guide portion 303 is a tooth-shaped sheet with a certain bend, and the angle of the bend is approximately the radian of a circle to guide the airflow output of the cooling fan as much as possible.

[0071] like Figure 4 As shown, in some embodiments, the axis of at least one guide portion 303 is tangent to the outer contour line of the impeller 301 , and along the airflow conveying direction, the guide portion 303 near the outlet of the air duct 302 is parallel to the guide surface 101 .

[0072] In the above embodiment, the axis of the guide portion 303 is tangent to the outer peripheral contour line of the impeller 301, so that the guide portion 303 can guide the airflow to be discharged from the cooling fan along the conveying direction of the air duct 302. The airflow can pass through the guide portion 303 more smoothly and be discharged from the outlet of the air duct 302 of the cooling fan, reducing the separation of the airflow, thereby avoiding the vortex of the airflow at the volute body 100; in addition, the guide portion 303 close to the outlet of the air duct 302 tends to be parallel to the guide surface 101, so that the airflow can maintain a consistent direction and speed as much as possible when flowing through the outlet position of the air duct 302, which is conducive to guiding most of the airflow to be discharged from the cooling fan through the guidance of the guide portion 303.

[0073] For example, Figure 4 As an example, Figure 4 The X direction is the horizontal direction, and the Y direction is the vertical direction. Along the flow path of the airflow (counterclockwise), the airflow is guided by the three guide parts 303 in sequence and then discharged from the outlet of the air duct 302. The angle between each guide part 303 and the horizontal direction increases successively. The angle between the guide part 303 located at the upstream end of the air duct 302 and the horizontal direction is 80°~100°, the angle between the guide part 303 located at the midstream end of the air duct 302 and the horizontal direction is 120°~130°, and the angle between the guide part 303 located at the downstream end of the air duct 302 and the horizontal direction is 150°~180°. It can be seen from this that the guide part 303 located at the downstream end is more inclined to guide the airflow to the guide surface 101, so that the airflow is guided and discharged through the guide surface 101.

[0074] In some embodiments, the volute 300 includes a frame body and covers disposed on either side of the frame body. The guide portion 303 is connected to one cover at each end to support the cover. In this embodiment, one of the covers in the volute 300 structure should be provided with an opening for air intake, and the other cover corresponding to the other cover should be a closed cover. The outlet of the air duct 302 of the volute 300 is located on the side end surface of the frame body.

[0075] The guide part 303 can be made of metal or high-strength plastic material. Since the two ends of the guide part 303 are connected with the two cover bodies respectively, the guide part 303 can support the two cover bodies, effectively enhance the structural strength of the interior of the volute 300, and improve the compression resistance and deformation resistance of the volute 300.

[0076] Here, it should be noted that the number of the guide part 303 can be flexibly set. The length and shape of the air duct 302 are different, and the guide angle, number and position of the guide part 303 are also adjusted accordingly.

[0077] Based on the same design concept, another embodiment of the present application further provides an electronic device, which comprises a device body and the heat dissipation fan of any one of the above embodiments.

[0078] Since the electronic device comprises the heat dissipation fan of any one of the above embodiments, the electronic device has all the advantages of the heat dissipation fan.

[0079] The device body has a heat generating end, and the heat dissipation fan can be installed near the heat generating end of the device body to guide and discharge the hot air flow of the heat generating end of the device body. For example, the electronic device is a notebook computer device, and the heat dissipation fan is installed near the chip heat generating end of the notebook computer to dissipate heat.

[0080] Finally, it should be noted that: other embodiments of the present application will be easily conceived by those skilled in the art after considering the specification and practicing the utility model disclosed herein. The present application is intended to cover any variations, uses or adaptations of the present application that follow the general principles of the present application and include common knowledge or conventional technical means in the technical field of the present application not disclosed by the present application, and is not limited to the precise structure described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the present application is only limited by the appended claims.

Claims

1. A snail tongue structure, characterized in that: include: The volute tongue body (100) has a guide surface (101) for guiding airflow output, and a windward surface (102) arranged opposite to the impeller (301) of the cooling fan; At least one spoiler (200) is provided on the volute tongue body (100), and the spoiler (200) is located between the guide surface (101) and the windward surface (102), and the spoiler (200) is used to divide at least part of the airflow of the cooling fan.

2. The snail tongue structure according to claim 1, characterized in that: The volute tongue body (100) further comprises a transition surface (103) for connecting the flow-guiding surface (101) and the windward surface (102), and the spoiler (200) is located on the transition surface (103).

3. The snail tongue structure according to claim 1 or 2, characterized in that: There are a plurality of the spoilers (200), and the plurality of spoilers (200) are evenly spaced and arranged.

4. The snail tongue structure according to claim 3, characterized in that: The spoiler (200) is a rectangular protrusion, an arc-shaped protrusion, or a wedge-shaped protrusion.

5. A cooling fan, characterized in that: The volute tongue structure according to any one of claims 1 to 4 further comprises: A volute (300) is provided with an impeller (301) therein, and an air duct (302) for guiding air flow is formed between the volute (300) and the impeller (301); At least one guide portion (303) is provided in the air duct (302) of the volute (300), the guide portion (303) being located on a side of the impeller (301) facing away from the windward surface (102), and the guide portion (303) extending along an air flow conveying direction to guide the air flow in the air duct (302) to be output from the volute (300).

6. The heat dissipation fan according to claim 5, characterized in that: The guide portion (303) has a plurality of parts; The plurality of guide portions (303) and the spoiler portion (200) are located on the same arc contour line.

7. The heat dissipation fan according to claim 5, characterized in that: The axis of at least one of the guide portions (303) is tangent to the outer peripheral contour line of the impeller (301), and along the airflow conveying direction, the guide portion (303) close to the outlet of the air duct (302) tends to be parallel to the guide surface (101).

8. The cooling fan according to any one of claims 5 to 7, characterized in that: Along the axial direction of the guide portion (303), the thickness of the middle portion of the guide portion (303) gradually decreases towards both sides.

9. The cooling fan according to any one of claims 5 to 7, characterized in that: The volute (300) comprises a frame body and covers arranged on both sides of the frame body, and both ends of the guide portion (303) are respectively connected to one of the covers to support the covers.

10. An electronic device, characterized in that: The device comprises a device body and a cooling fan as described in any one of claims 5 to 9.

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