Air guide structure and fan applying same

Abstract

The application discloses a wind guide structure and a fan applying the same. The wind guide structure is connected with a volute, and comprises an adapter and an air outlet pipeline. One end of the adapter is connected with an air outlet of the volute, and the other end of the adapter is connected with the air outlet pipeline. The wind guide structure further comprises a cyclone assembly. One side surface of the cyclone assembly is fixed on an inner wall of the air outlet pipeline, so that air flow rotates in the air outlet pipeline. Traditional technology adopts a curved pipe or a square pipe with a certain radian to change the direction of air flow. Experiments show that in this way, air flow is concentrated at the outlet, which is not conducive to comfort, and the air flow uniformity is poor. The air outlet pipeline of the application has the cyclone assembly. The setting mode of the inner rotation can change the flow direction of the gas, so that the air flow rotates to blow out, and the purpose of uniform air flow is achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of air guide equipment and relates to an air guide structure and a fan using the same. Background Art

[0002] A centrifugal fan is a mechanical device that relies on input mechanical energy to increase gas pressure and deliver gas in parallel. The characteristic of a centrifugal fan is that the airflow pressure is relatively high and it can deliver the airflow to a distant place. In scenarios where a higher airflow pressure is required, a centrifugal fan is generally chosen. The airflow direction of a centrifugal fan is characterized by axial air inlet and radial air outlet. However, after applying the centrifugal fan to a specific product, the airflow direction often needs to be changed.

[0003] The existing technology forcibly changes the direction of the airflow by adding additional air ducts. Although this method can change the direction of the airflow, it has a large attenuation on the air volume, which can reach about 40%. In order to reduce the attenuation of the air volume, some existing technologies use curved curved pipes or square pipes to change the direction of the airflow. Although this effectively reduces the attenuation of the air volume, this method uses curved pipes, so the airflow will flow along one side of the pipe wall, and the airflow uniformity is poor, and it is often concentrated on one side of the pipe. Summary of the Invention

[0004] In view of this, the present invention provides an air guide structure and a fan using the same, which solves the problem of poor airflow uniformity caused by changing the gas flow direction in the prior art.

[0005] In order to solve the above problems, according to one aspect of the present application, an embodiment of the present invention provides an air guide structure, which is connected to the volute, and the air guide structure includes an adapter and an air outlet duct, one end of the adapter is connected to the air outlet of the volute, and the other end of the adapter is connected to the air outlet duct; the air guide structure also includes a cyclone assembly, one side of the cyclone assembly is fixed on the inner wall of the air outlet duct so that the airflow rotates in the air outlet duct.

[0006] In some embodiments, the cyclone assembly includes a columnar body, and along the flow direction of the airflow in the air outlet duct, the second end of the columnar body rotates in the same direction relative to the first end.

[0007] In some embodiments, along the flow direction of the airflow in the air outlet duct, a first spiral surface and a second spiral surface are provided on the columnar body, one side of the first spiral surface is connected to one side of the second spiral surface through a fixed surface, and the other side of the first spiral surface is connected to the other side of the second spiral surface through an arc surface.

[0008] In some embodiments, on the radial cross section of the air outlet duct, the first helical surface and the second helical surface are both arc-shaped structures or spline curves.

[0009] In some embodiments, when both the first helical surface and the second helical surface are arc-shaped structures, in the same radial section of the air outlet duct, the radian of the first helical surface is greater than that of the second helical surface; wherein, the first helical surface is the windward surface and the second helical surface is the leeward surface.

[0010] In some embodiments, when the second end of the columnar body rotates at least two cycles relative to the first end in the same direction, among all the radial sections of the air outlet duct, there are at least two radial sections with the same rotation angle, and the distance H between the two radial sections is:

[0011]

[0012] where K is an adjustment parameter, 0.98 < K < 1.25, and the cycle is that the second end rotates 360° relative to the first end.

[0013] In some embodiments, the air outlet duct includes a transition section and a wind guiding section. The shape of the transition section matches the shape of the adapter. The wind guiding section is a cylindrical structure. One end of the transition section is connected to the adapter, and the other end is connected to the wind guiding section; and, along the flowing direction of the air flow in the air outlet duct, the inner diameter of the wind guiding section gradually decreases.

[0014] According to one aspect of the present application, an embodiment of the present invention provides a fan, and the fan includes the above-mentioned wind guiding structure.

[0015] In some embodiments, when the air volume in the air outlet duct is greater than 100m 3 / h, the rotational speed of the fan is greater than 1500 rpm, and the transmission medium is air, along the flowing direction of the air flow in the air outlet duct, the inner diameter of the air outlet duct gradually decreases, and satisfies:

[0016]

[0017]

[0018] where D1 is the maximum inner diameter of the air outlet duct, D2 is the minimum inner diameter of the air outlet duct, and L is the length of the air outlet duct.

[0019] In some embodiments, when the rotational speed of the fan is less than 1500 rpm, three cyclone components are provided, and the three cyclone components are uniformly fixed on the inner wall of the air outlet duct along the circumferential direction of the air outlet duct;

[0020] and / or when the rotational speed of the fan is between 1500 rpm and 1900 rpm, four cyclone components are provided, and the four cyclone components are uniformly fixed on the inner wall of the air outlet duct along the circumferential direction of the air outlet duct;

[0021] And / or when the rotation speed of the fan is greater than 1900 rpm, five cyclone assemblies are provided, and the five cyclone assemblies are evenly fixed on the inner wall of the air outlet duct along the circumference of the air outlet duct.

[0022] Compared with the prior art, the air guide structure of the present invention has at least the following beneficial effects:

[0023] The air guide structure provided by the present invention is connected to the volute, and the air guide structure includes an adapter and an air outlet duct, one end of the adapter is connected to the air outlet of the volute, and the other end of the adapter is connected to the air outlet duct; the air guide structure also includes a cyclone assembly, one side of the cyclone assembly is fixed on the inner wall of the air outlet duct so that the airflow rotates in the air outlet duct.

[0024] Traditional technology uses curved bends or square tubes to change the direction of the airflow. Experiments have shown that this method concentrates the airflow at the outlet, which is not conducive to comfort and has poor airflow uniformity. The air outlet duct of the present invention has a cyclone component, and the inward rotation setting can change the flow direction of the gas, causing the airflow to rotate and exhaust, thereby achieving the purpose of uniform airflow.

[0025] On the other hand, the fan provided by the present invention is designed based on the above-mentioned air guide structure. Its beneficial effects can be found in the beneficial effects of the above-mentioned air guide structure, which will not be described in detail here.

[0026] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 is a structural schematic diagram of an air guide structure provided by an embodiment of the present invention;

[0029] Figure 2 1 is a schematic structural diagram of a cyclone assembly in an air guide structure provided by an embodiment of the present invention;

[0030] Figure 3 is a cross-sectional view of a cyclone assembly in an air guide structure provided by an embodiment of the present invention;

[0031] Figure 4 It is a cross-sectional view of an air outlet duct in an air guide structure provided by an embodiment of the present invention.

[0032] in:

[0033] 1. Volute; 2. Adapter; 3. Air outlet duct; 4. Cyclone assembly; 5. Impeller; 31. Transition section; 32. Air guide section; 41. First spiral surface; 42. Second spiral surface; 43. Fixed surface; 44. Arc surface. DETAILED DESCRIPTION

[0034] To further illustrate the technical means and effects employed by the present invention to achieve its intended objectives, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention is provided in conjunction with the accompanying drawings and preferred embodiments. In the following description, different references to "one embodiment" or "embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics of one or more embodiments may be combined in any suitable manner.

[0035] In the description of the present invention, it should be clarified that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence; the terms "vertical", "transverse", "longitudinal", "front", "back", "left", "right", "up", "down", "horizontal", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention, and do not mean that the devices or elements referred to must have a specific direction or position, and therefore cannot be understood as limiting the present invention.

[0036] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0037] Example 1

[0038] This embodiment provides a wind guide structure, such as Figure 1-4 As shown, the air-guiding structure is connected to the volute 1, and the air-guiding structure includes an adapter 2 and an air outlet duct 3. One end of the adapter 2 is connected to the air outlet of the volute 1, and the other end of the adapter 2 is connected to the air outlet duct 3; the air-guiding structure also includes a cyclone assembly 4, and one side of the cyclone assembly 4 is fixed on the inner wall of the air outlet duct 3 so that the airflow rotates in the air outlet duct 3.

[0039] Specifically, there is an impeller 5 in the volute 1, and the air outlet of the volute 1 is connected to the air outlet duct 3 through the adapter 2 to realize the transmission of wind; at the same time, the wind is guided through the air outlet duct 3; the cyclone assembly 4 is a fixed component, which does not move itself, but can make the airflow rotate.

[0040] The cyclone assembly 4 is arranged along the axial direction of the air outlet duct 3, and one of the side surfaces of the cyclone assembly 4 is fixed on the inner wall of the air outlet duct 3. Of course, in order to achieve close fixation, the side surface can match the shape of the inner wall of the air outlet duct 3, for example, both are arc-shaped; the surface of the cyclone assembly 4 facing the inside of the air outlet duct 3 (that is, the surface in contact with the airflow) is spiral-shaped. When the airflow flows in the air outlet duct 3, it contacts the spiral-shaped cyclone assembly 4, and the airflow will also rotate at this time, thereby causing the outlet of the air outlet duct 3 to rotate and discharge air.

[0041] Compared with the traditional technology that changes the direction of the airflow by adding an additional air duct, resulting in a serious attenuation of the air volume, this embodiment has the advantage of low air volume attenuation by adding an air outlet duct 3; compared with the traditional technology that uses curved bends or square tubes to change the direction of the airflow, resulting in poor airflow uniformity, the air outlet duct 3 of this embodiment has a cyclone component 4. This inward rotating setting can change the flow direction of the gas, causing the airflow to rotate and exhaust, thereby achieving the purpose of uniform airflow.

[0042] In addition, the rotating airflow can not only improve the problem of concentrated airflow and improve the uniformity of airflow, but also increase the air supply area and effectively improve human comfort.

[0043] In a specific embodiment, the cyclone assembly 4 includes a columnar body, and along the flow direction of the airflow in the air outlet duct 3, the second end of the columnar body rotates in the same direction relative to the first end.

[0044] Specifically, the columnar body is a solid structure, and along the flow direction of the airflow in the air outlet duct 3, the second end of the columnar body rotates in the same direction relative to the first end. Specifically, the entire columnar body is spiral, similar to the structure of a twisted rope; and the angle of rotation can be 360°, 720°, etc., which is not specifically limited here. The angle of rotation depends on the air volume, wind speed, etc. in the air outlet duct 3.

[0045] In a specific embodiment, Figure 3 As shown, along the flow direction of the airflow in the air outlet duct 3, a first spiral surface 41 and a second spiral surface 42 are provided on the columnar body, one side of the first spiral surface 41 is connected to one side of the second spiral surface 42 through a fixed surface 43, and the other side of the first spiral surface 41 is connected to the other side of the second spiral surface 42 through an arc surface 44.

[0046] The first helical surface 41, the second helical surface 42, the fixed surface 43, and the arc surface 44 are all arranged along the length of the cylindrical body. The first helical surface 41 and the second helical surface 42 are helical, and therefore, the connected fixed surface 43 and the arc surface 44 are also helical. More specifically, the first helical surface 41 and the second helical surface 42 are grooves oriented toward the axis of the cylindrical body. The fixed surface 43 can be a flat surface or an arc surface that mates with the inner wall of the air outlet duct 3.

[0047] In a specific embodiment, on the radial cross section of the air outlet duct 3 , the first helical surface 41 and the second helical surface 42 are both arc-shaped structures or spline curves;

[0048] When the first helical surface 41 and the second helical surface 42 are both arc-shaped structures, the first helical surface 41 and the second helical surface 42 are groove structures facing the axis of the cylindrical body, the bottom of the groove structure is an arc surface, and the arc surface 44 is a protrusion facing away from the axis of the cylindrical body, and the top surface of the protrusion is an arc surface.

[0049] In addition, a spline curve is a curve obtained by giving a set of control points, and the shape of the curve is controlled by these points.

[0050] From the above description, it can be seen that the cyclone component 4 in this embodiment is a shark fin structure. The shark fin structure is one of the more mature structures currently used in bionic structures. This embodiment adds a shark fin structure in the air outlet duct 3, which effectively reduces wind resistance while causing the airflow to rotate.

[0051] In a specific embodiment, when the first spiral surface 41 and the second spiral surface 42 are both arc-shaped structures, in the same radial cross-section of the air outlet duct 3, the curvature of the first spiral surface 41 is greater than the curvature of the second spiral surface 42; wherein, the first spiral surface 41 is the windward surface, and the second spiral surface 42 is the leeward surface.

[0052] The traditional shark fin structure is generally symmetrical, which is reflected in the present solution in that the structures of the first helical surface 41 and the second helical surface 42 on the same cross section are exactly the same, with the same curvature, the same depth, etc.; while in this embodiment, in the same radial cross section of the air outlet duct 3, the curvature of the first helical surface 41 is greater than the curvature of the second helical surface 42, that is, the shark fin structure in this embodiment is an asymmetric structure, which improves the conventional shark fin structure and is modified using NURBS curves. NURBS is the abbreviation of non-uniform rational B-splines, which is a very excellent and mature modeling method; the asymmetric shark fin structure obtained after modification using NURBS curves can reduce resistance while being more conducive to wind guidance and improving the uniformity of airflow.

[0053] In addition, in this embodiment, the NURBS curve is used to modify the conventional shark fin structure. The specific design is as follows: the curve control points are adjusted according to the streamlines in the simulation velocity streamline diagram to conform to the streamline direction for reverse design; after the reverse design, simulation verification is carried out for forward design to make the air outlet evenly discharge air with a relatively small reduction in air volume.

[0054] Table 1 shows the profile parameters of a certain radial section of the cyclone component 4 after modifying the conventional shark fin structure using the NURBS curve;

[0055] In Table 1 below, the X and Y of L1 respectively correspond to the abscissa and ordinate of the control points on the control curve of the arc surface 44, the X and Y of L2 respectively correspond to the abscissa and ordinate of the control points on the control curve of the first spiral surface 41, the X and Y of L3 respectively correspond to the abscissa and ordinate of the control points on the control curve of the fixed surface 43, and the X and Y of L4 respectively correspond to the abscissa and ordinate of the control points on the control curve of the second spiral surface 42; the origin is at the intersection of the fixed surface 43 and the second spiral surface 42. The parameters in the following table can be used to obtain Figure 3 the radial section of the cyclone component 4 in

[0056] Table 1

[0057]

[0058] In a specific embodiment, when the second end of the columnar body 41 rotates at least two cycles relative to the first end in the same direction, among all the radial sections of the air outlet duct 3, there are at least two radial sections with the same rotation angle. The distance H between the two radial sections is:

[0059]

[0060] where K is an adjustment parameter, 0.98 < K < 1.25, and the cycle is that the second end rotates 360° relative to the first end.

[0061] To better explain and illustrate the above features, assume that the second end of the columnar body rotates 720° evenly in the same direction relative to the first end, that is, rotates two cycles; assume that the rotation of a angle in the first cycle corresponds to the first radial section, and the rotation of a angle in the second cycle corresponds to the second radial section, then the distance between the first radial section and the second radial section is H.

[0062] More specifically, in the process of manufacturing the shark fin structure, if the corresponding two-dimensional model is made first, it is actually equivalent to a radial section, and then the radial section is rotated and stretched to form a cycle, and the stretching length is the above-mentioned distance H.

[0063] In a specific embodiment, the air outlet duct 3 includes a transition section 31 and an air guide section 32. The shape of the transition section 31 matches the shape of the adapter 2. The air guide section 32 is a cylindrical structure. One end of the transition section 31 is connected to the adapter 2, and the other end is connected to the air guide section 32. Moreover, along the flow direction of the airflow in the air outlet duct 3, the inner diameter of the air guide section 32 gradually decreases.

[0064] The volute 1 generally has a square outlet. In order to ensure matching, the adapter 2 is generally also square. In order to ensure that the air volume passing through the adapter 2 can be better transmitted to the air outlet duct 3, the transition section 31 directly connected to the adapter 2 is in the direction, and then slowly transitions to the air guide section 32 with a cylindrical structure. The cyclone assembly 4 is arranged on the inner wall of the air guide section 32.

[0065] Example 2

[0066] This embodiment provides a fan, which includes the air guide structure of Example 1.

[0067] In a specific embodiment, when the air volume in the air outlet duct 3 is greater than 100m 3 / h, the speed of the fan is greater than 1500 rpm, and when the transmission medium is air, the inner diameter of the air outlet duct 3 gradually decreases along the flow direction of the airflow in the air outlet duct 3, and meets the following requirements:

[0068]

[0069]

[0070] Wherein, D1 is the maximum inner diameter of the air outlet duct 3 , D2 is the minimum inner diameter of the air outlet duct 3 , and L is the length of the air outlet duct 3 .

[0071] Under simulation verification, when the air volume in the air outlet duct 3 is greater than 100m 3 / h, the rotation speed of the fan is greater than 1500rpm, and when the transmission medium is air, the structure of the air outlet duct 3 that meets the above formula can effectively reduce the air volume attenuation and control it within 5%.

[0072] Along the flow direction of the airflow in the air outlet duct 3, the inner diameter of the air outlet duct 3 gradually decreases, that is, the air outlet duct 3 is a tapered structure with an inward rotation effect, which can increase a certain air supply distance and effectively improve human comfort.

[0073] In a specific embodiment, when the rotational speed of the fan is less than 1500 rpm, three cyclone assemblies 4 are provided, and the three cyclone assemblies 4 are evenly fixed on the inner wall of the air outlet duct 3 along the circumference of the air outlet duct 3; that is, the three cyclone assemblies 4 are evenly fixed on the inner wall of the air outlet duct 3 at intervals of 120°.

[0074] When the rotation speed of the fan is between 1500rpm-1900rpm, four cyclone assemblies 4 are provided, and the four cyclone assemblies 4 are evenly fixed on the inner wall of the air outlet duct 3 along the circumference of the air outlet duct 3; that is, the four cyclone assemblies 4 are evenly fixed on the inner wall of the air outlet duct 3 at intervals of 90°.

[0075] When the rotation speed of the fan is greater than 1900 rpm, five cyclone assemblies 4 are provided, and the five cyclone assemblies 4 are evenly fixed on the inner wall of the air outlet duct 3 along the circumference of the air outlet duct 3; that is, the five cyclone assemblies 4 are evenly fixed on the inner wall of the air outlet duct 3 at intervals of 72°.

[0076] The relationship between the number of the cyclone components 4 and the corresponding rotational speed has been verified by simulation. Under this relationship, the attenuation of the air volume is small and the uniformity of the air flow is good.

[0077] This embodiment adopts the air guide structure in Example 1, and the air outlet duct 3 has a spiral windward surface, and the inner diameter of the air outlet duct 3 gradually decreases, that is, the air outlet duct is a tapered structure with an inward rotation effect. This structure can reduce the problem of concentrated airflow after the direction of the airflow at the fan outlet changes, and at the same time can increase a certain air supply area, increase the air supply area closer to the outlet, and thus effectively improve human comfort.

[0078] In summary, it is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous technical features can be freely combined and superimposed.

[0079] The above are merely preferred embodiments of the present invention and do not constitute any form of limitation to the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. An air guide structure, characterized in that: The air guiding structure is connected to the volute. The air guiding structure includes an adapter and an air outlet duct. One end of the adapter is connected to the air outlet of the volute, and the other end of the adapter is connected to the air outlet duct. The air guiding structure further includes a cyclone component. One side of the cyclone component is fixed to the inner wall of the air outlet duct so that the air flow rotates in the air outlet duct. The cyclone component includes a columnar body. Along the flow direction of the air flow in the air outlet duct, the second end of the columnar body rotates in the same direction relative to the first end. When the second end of the columnar body rotates in the same direction relative to the first end for at least two cycles, in all radial cross-sections of the air outlet duct, there are at least two radial cross-sections with the same rotation angle. The distance H between the two radial cross-sections is: ； Where K is an adjustment parameter, 0.98 < K < 1.

25. The cycle is that the second end rotates 360° relative to the first end. D1 is the maximum inner diameter of the air outlet duct, D2 is the minimum inner diameter of the air outlet duct, and L is the length of the air outlet duct.

2. The air guide structure according to claim 1, characterized in that: Along the flow direction of the air flow in the air outlet duct, a first spiral surface and a second spiral surface are formed on the columnar body. One side of the first spiral surface is connected to one side of the second spiral surface through a fixed surface, and the other side of the first spiral surface is connected to the other side of the second spiral surface through an arc surface.

3. The air guide structure according to claim 2, characterized in that: In the radial cross-section of the air outlet duct, both the first spiral surface and the second spiral surface are arc-shaped structures.

4. The air guide structure according to claim 2, characterized in that: In the radial cross-section of the air outlet duct, both the first spiral surface and the second spiral surface are spline curves.

5. The air guide structure according to claim 3, characterized in that: In the same radial cross-section of the air outlet duct, the radian of the first spiral surface is greater than that of the second spiral surface. Among them, the first spiral surface is the windward surface, and the second spiral surface is the leeward surface.

6. The air guide structure according to any one of claims 1 to 5, characterized in that: The air outlet duct includes a transition section and a wind guiding section. The shape of the transition section matches the shape of the adapter. The wind guiding section is a cylindrical structure. One end of the transition section is connected to the adapter, and the other end is connected to the wind guiding section. And along the flow direction of the air flow in the air outlet duct, the inner diameter of the wind guiding section gradually decreases.

7. A fan, characterized in that: The fan includes the air guiding structure according to any one of claims 1-6.

8. The fan according to claim 7, characterized in that: When the air volume in the air outlet duct is greater than 100 m³ / h, the rotational speed of the fan is greater than 1500 rpm, and the transmission medium is air, along the flow direction of the air flow in the air outlet duct, the inner diameter of the air outlet duct gradually decreases and satisfies: ； ； Where D1 is the maximum inner diameter of the air outlet duct, D2 is the minimum inner diameter of the air outlet duct, and L is the length of the air outlet duct.

9. The fan according to claim 7 or 8, characterized in that: When the rotational speed of the fan is less than 1500 rpm, three cyclone components are provided. The three cyclone components are evenly fixed on the inner wall of the air outlet duct along the circumferential direction of the air outlet duct. And / or when the rotational speed of the fan is between 1500 rpm and 1900 rpm, four cyclone components are provided. The four cyclone components are evenly fixed on the inner wall of the air outlet duct along the circumferential direction of the air outlet duct. And / or when the rotation speed of the fan is greater than 1900 rpm, five cyclone assemblies are provided, and the five cyclone assemblies are evenly fixed on the inner wall of the air outlet duct along the circumference of the air outlet duct.

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