Volute structure and fan

Abstract

The fan comprises the volute structure, the volute structure comprises a main body, a containing cavity and an air outlet are formed in the main body, the air outlet is communicated with the containing cavity, the volute structure further comprises a flow guide plate, the flow guide plate is arranged in the containing cavity, and the flow guide plate is arranged in the containing cavity. The first end of the flow guide plate is rotatably and movably arranged on the side, close to the air outlet, of the containing cavity, and the second end of the flow guide plate extends in the direction from the containing cavity to the air outlet. According to the volute structure and the draught fan, the problem that in the prior art, the draught fan can be matched with a single use scene is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fluid machinery, in particular to a volute structure and a fan. BACKGROUND

[0002] Most of the existing fans have a volute structure, which is used to converge and guide the airflow after the rotation of the impeller. However, when the airflow flows out of the air outlet of the volute structure, part of the airflow will backflow at the air outlet, resulting in excessive noise and low air outlet efficiency of the fan.

[0003] One existing solution is to set a specific guide plate at the air outlet according to the use scenario and working condition of the fan, thereby reducing the backflow of the airflow at the air outlet of the fan in this use scenario. However, this setting has a problem that when the use scenario or required working condition of the fan changes, the guide plate may not be able to adapt to the new working environment and working condition, thereby reducing the guiding ability of the guide plate, that is, the existing fan can adapt to a single use scenario. CONTENT OF THE UTILITY MODEL

[0004] The main purpose of the present application is to provide a volute structure and a fan to at least solve the problem that the existing fan can adapt to a single use scenario.

[0005] According to one aspect of the present application, a volute structure is provided, which comprises a main body, a containing cavity and an air outlet are formed in the main body, the air outlet is in communication with the containing cavity, and the volute structure further comprises:

[0006] a guide plate, which is arranged in the containing cavity, and a first end of the guide plate is rotatably and movably arranged at one side of the containing cavity close to the air outlet, and a second end of the guide plate extends in the direction from the containing cavity to the air outlet.

[0007] Further, a rotating part is arranged on the guide plate, and the guide plate is rotatably connected with the inner wall surface of the containing cavity through the rotating part;

[0008] a moving part is arranged on the main body, the moving part is located at one side of the inner wall surface of the containing cavity close to the air outlet, and the guide plate is movably arranged in the moving part;

[0009] wherein the rotation and movement of the guide plate in the containing cavity are independent of each other.

[0010] Further, the rotating part comprises a connecting shaft;

[0011] One end of the connecting shaft is fixedly connected to the flow guide plate, and the other end of the connecting shaft is rotatably connected to the inner wall surface of the accommodating cavity.

[0012] Alternatively, the connecting shaft is connected to the inner wall surface of the accommodating cavity, and the flow guide plate is sleeved outside the connecting shaft and can rotate around the connecting shaft.

[0013] Further, the connecting shaft has a plurality of planes in the circumferential direction of the connecting shaft, and each plane is sequentially connected end to end in the circumferential direction of the connecting shaft.

[0014] Alternatively, the connecting shaft is a cylindrical shaft.

[0015] Further, the moving part includes a sliding groove, and the flow guide plate is rotatably and movably connected to the sliding groove through the rotating part.

[0016] Further, the accommodating cavity includes a cylindrical cavity and an air outlet part, the air outlet part is connected to the cylindrical cavity and is arranged outside the cylindrical cavity, and the sliding groove is arranged between the cylindrical cavity and the air outlet part and extends away from the cylindrical cavity in the circumferential direction.

[0017] Further, along the height direction of the cylindrical cavity, a raised section is arranged on the inner bottom wall surface of the accommodating cavity, the raised section is raised in the height direction of the cylindrical cavity, the top of the raised section is provided with the sliding groove, and the width of the raised section gradually decreases along the height direction of the cylindrical cavity; and / or,

[0018] Along the height direction of the cylindrical cavity, a raised section is arranged on the inner top wall surface of the accommodating cavity, the raised section is raised in the direction opposite to the height direction of the cylindrical cavity, the bottom of the raised section is provided with the sliding groove, and the width of the raised section gradually increases along the height direction of the cylindrical cavity.

[0019] Further, the main body includes a first shell and a second shell, the first shell is connected to the second shell, and the accommodating cavity is located between the first shell and the second shell.

[0020] The moving part is arranged on the first shell and the second shell, and the flow guide plate is rotatably and movably connected to the moving part through the rotating part.

[0021] Further, the volute structure further includes a driving assembly, the driving assembly is connected to the flow guide plate, and is used at least for driving the flow guide plate to rotate in the accommodating cavity and driving the flow guide plate to move in the accommodating cavity.

[0022] In another aspect, the application also provides a fan, which comprises the volute structure as described above.

[0023] Compared with the prior art, the first end of the guide plate is rotatably and movably arranged at one side of the accommodating cavity close to the air outlet, and the second end of the guide plate extends in the direction from the accommodating cavity to the air outlet. This means that when the use scenario of the fan changes or the working condition of the fan needs to be changed, the guide plate can be rotated or the first end of the guide plate can be moved, so as to change the position of the guide plate in the accommodating cavity and the angle between the guide plate and the air outlet, so as to adapt to the new use scenario or the new working condition of the fan. For example, when the fan needs to reduce the air volume, due to the change of the air volume, the position of the guide plate before cannot effectively guide the airflow in the fan under the new working condition, which may cause the noise in the volute mechanism to increase or the air outlet efficiency of the fan to decrease. At this time, the guide plate can be adjusted to the optimal guide position by rotating the guide plate and moving the position of the guide plate in the accommodating cavity, so as to adapt to the new working condition of the fan. In addition, in the application, the second end of the guide plate extends in the direction close to the air outlet. One purpose of this design is that the debugging personnel can adjust the rotation angle and the moving position of the guide plate in the accommodating cavity through the air outlet. The volute structure of the application improves the adaptability of the fan, so that the fan can be applied to more scenes. BRIEF DESCRIPTION OF DRAWINGS

[0024] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and serve to explain the principles of the application, and do not limit the application. In the drawings:

[0025] Figure 1 is a structural schematic view of the volute structure disclosed in the application;

[0026] Figure 2 is an exploded structural schematic view of the volute structure disclosed in the application;

[0027] Figure 3 is a structural schematic view of the first shell disclosed in the application;

[0028] Figure 4 is a structural schematic view of the second shell disclosed in the application;

[0029] Figure 5 is an assembly schematic view of the guide plate and the connecting shaft disclosed in the application.

[0030] Among them, the above-mentioned drawings include the following reference signs:

[0031] 10, main body; 11, first shell; 12, second shell; 20, flow guide plate; 30, rotating part; 31, connecting shaft; 40, moving part; 41, sliding groove; 101, accommodating cavity; 102, air outlet; 103, protruding section; 111, volute tongue; 1011, cylindrical cavity; 1012, air outlet part; 311, plane. DETAILED DESCRIPTION

[0032] It should be noted that the embodiments and features of the embodiments in the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0033] It should be noted that the terms used herein are only intended to describe specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and it should also be understood that when the terms "comprise" and / or "include" are used in the specification, there is a reference to the presence of a feature, step, operation, device, component, and / or combinations thereof.

[0034] Unless otherwise specifically stated, the relative arrangements of parts and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that the sizes of the various parts shown in the drawings are not drawn in proportion to the actual proportions. Techniques, methods, and devices known to those of ordinary skill in the relevant art can not be discussed in detail, but under appropriate circumstances, the techniques, methods, and devices should be considered as part of the authorized specification. In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary, and not as a limitation. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0035] Reference is made to Figures 1 to 5 As shown, according to the embodiments of the present application, a fan is provided, which includes a volute structure, the volute structure includes a main body 10, the main body 10 is provided with an accommodating cavity 101 and an air outlet 102, the air outlet 102 is in communication with the accommodating cavity 101, the volute structure further includes a flow guide plate 20, the flow guide plate 20 is arranged in the accommodating cavity 101, and a first end of the flow guide plate 20 is rotatably and movably arranged on one side of the accommodating cavity 101 close to the air outlet 102, and a second end of the flow guide plate 20 extends in the direction from the accommodating cavity 101 to the air outlet 102.

[0036] Specifically, the volute structure further comprises a fan blade (not shown in the figure), which is arranged in the accommodating cavity 101. When the fan blade rotates, air flow is generated in the accommodating cavity 101, and finally flows out through the air outlet 102 under the action of the inner wall surface of the accommodating cavity 101. The guide plate 20 is arranged on the side of the accommodating cavity 101 close to the air outlet 102, so as to adjust the direction of the air flow flowing out of the air outlet 102, thereby avoiding the backflow of part of the air flow at the air outlet 102 into the accommodating cavity 101, causing excessive noise in the volute structure and reducing the air outlet efficiency.

[0037] Compared with the prior art, the first end of the guide plate 20 is rotatably and movably arranged on the side of the accommodating cavity 101 close to the air outlet 102, and the second end of the guide plate 20 extends in the direction from the accommodating cavity 101 to the air outlet 102. This means that when the use scene of the fan changes or the working condition of the fan needs to be changed, the first end of the guide plate 20 can be rotated or moved, so as to change the position of the guide plate 20 in the accommodating cavity 101 and the angle between the guide plate 20 and the air outlet 102, so as to adapt to the new use scene or new working condition of the fan. For example, when the fan needs to reduce the air outlet volume, due to the change of the air outlet volume, the position of the guide plate 20 before cannot effectively guide the air flow in the fan under the new working condition, which may increase the noise in the volute mechanism or reduce the air outlet efficiency of the fan. At this time, the guide plate 20 can be adjusted to the best guide position by rotating the guide plate 20 and moving the position of the guide plate 20 in the accommodating cavity 101, so as to adapt to the new working condition of the fan. In addition, in the embodiment, the second end of the guide plate 20 extends in the direction close to the air outlet 102. One purpose of this design is that the debugging personnel can adjust the rotation angle and the moving position of the guide plate 20 in the accommodating cavity 101 through the air outlet 102. The volute structure of the embodiment improves the adaptability of the fan, so that the fan can be applied to more scenes.

[0038] Further, the guide plate 20 is provided with a rotating part 30, and the guide plate 20 is rotatably connected with the inner wall surface of the accommodating cavity 101 through the rotating part 30. The main body 10 is provided with a moving part 40, which is located on the side of the inner wall surface of the accommodating cavity 101 close to the air outlet 102, and the guide plate 20 is movably arranged in the moving part 40. The rotation and movement of the guide plate 20 in the accommodating cavity 101 are independent of each other.

[0039] Specifically, in the embodiment, the rotation and movement of the guide plate 20 in the accommodating cavity 101 are independent of each other, that is, the rotation of the guide plate 20 in the accommodating cavity 101 does not interfere with the movement of the guide plate 20 in the accommodating cavity 101, which increases the rotation angle and the moving range of the guide plate 20 in the accommodating cavity 101, and further improves the adaptability of the volute structure.

[0040] In some embodiments, the rotating part 30 comprises a connecting shaft 31; one end of the connecting shaft 31 is fixedly connected to the deflector 20, and the other end of the connecting shaft 31 is rotatably connected to the inner wall surface of the accommodating cavity 101.

[0041] Specifically, the connecting shaft 31 can be integrally formed with the deflector 20, or the connecting shaft 31 can be embedded in the deflector 20, so that one end of the connecting shaft 31 is fixed to the deflector 20. In a specific embodiment, a groove is formed in the inner wall surface of the accommodating cavity 101, and the end of the connecting shaft 31 away from the deflector 20 is rotatably arranged in the groove. When the connecting shaft 31 rotates, the connecting shaft 31 drives the deflector 20 to rotate in the groove.

[0042] In other embodiments, the connecting shaft 31 is connected to the inner wall surface of the accommodating cavity 101, and the deflector 20 is sleeved outside the connecting shaft 31 and can rotate around the connecting shaft 31. Specifically, unlike the above-mentioned embodiments, in this embodiment, the connecting shaft 31 is fixedly connected to the inner wall surface of the accommodating cavity 101, that is, the connecting shaft 31 cannot rotate, while the deflector 20 can rotate relative to the connecting shaft 31.

[0043] In some embodiments, in order to facilitate the adjustment of the rotation angle of the deflector 20, the connecting shaft 31 has a plurality of planes 311 in the circumferential direction, and each plane 311 is sequentially connected end to end along the circumferential direction of the connecting shaft 31.

[0044] That is, after rotating the connecting shaft 31, in the fixed direction, the outer periphery of the connecting shaft 31 changes from one plane 311 to another plane 311, or after rotating the deflector 20, the plane 311 of the outer periphery of the connecting shaft 31 corresponding to the extension direction of the deflector 20 changes to another plane 311, the angle of rotation of the connecting shaft 31 can be calculated according to the corresponding central angle of each plane 311. In a specific embodiment, if 12 identical planes 311 are arranged in the circumferential direction of the connecting shaft 31, when the connecting shaft 31 rotates by the range of one plane 311, the connecting shaft 31 rotates by 30° at this time, so that the adjustment of the rotation angle of the deflector 20 becomes stepless adjustment, which facilitates to improve the adjustment efficiency of the deflector 20.

[0045] In other embodiments, the connecting shaft 31 is a cylindrical shaft. That is, the outer periphery of the connecting shaft 31 is an arc surface closed at both ends at this time, and the adjustment of the angle of the deflector 20 is stepless adjustment, which can make the adjustment of the angle of the deflector 20 more accurate compared with stepless adjustment.

[0046] Further, the moving part 40 comprises a sliding groove 41, and the deflector 20 is rotatably and movably connected to the sliding groove 41 through the rotating part 30.

[0047] In other words, the end of the connecting shaft 31 facing away from the guide plate 20 is slidably disposed in the groove 41. When the connecting shaft 31 slides in the groove 41, it drives the guide plate 20 to move within the receiving cavity 101, thereby changing the airflow direction or airflow area at the air outlet 102. Furthermore, the groove 41 also serves to limit the movement of the connecting shaft 31, preventing it from disengaging and causing the guide plate 20 to malfunction.

[0048] Optionally, the moving part 40 can also be a component consisting of a lead screw and a motor. The guide plate 20 is sleeved on the lead screw, which is located in the accommodating cavity 101. The motor drives the lead screw to rotate, thereby causing the guide plate 20 to reciprocate on the lead screw, thereby changing the position of the guide plate 20 in the accommodating cavity 10.

[0049] Furthermore, the accommodating cavity 101 includes a cylindrical cavity 1011 and an air outlet 1012. The air outlet 1012 is connected to the cylindrical cavity 1011 and is disposed on the outer periphery of the cylindrical cavity 1011. A sliding groove 41 is provided between the cylindrical cavity 1011 and the air outlet 1012. The sliding groove 41 extends in a circumferential direction away from the cylindrical cavity 1011.

[0050] In some embodiments, as shown in the appendix Figure 3 As shown, the air outlet 1012 has a volute tongue 111 at the connection between it and the cylindrical cavity 1011, and the air outlet 102 is located on the side of the air outlet 1012 away from the cylindrical cavity 1011. One end of the slide groove 41 is located at the volute tongue 111, and the other end of the slide groove 41 extends along the direction close to the inner wall surface of the air outlet 1012. In this embodiment, the position of the slide groove 41 is designed to facilitate the adjustment of the position of the guide plate 20, thereby better guiding the airflow in the cylindrical cavity 1011 out of the air outlet 1012; on the other hand, the position of the slide groove 41 will not cause too much interference between the airflow in the cylindrical cavity 1011 and the guide plate 20 on the slide groove 41, which would lead to excessive airflow loss and ultimately reduce the airflow performance of the fan. In some embodiments, the chute 41 is convexly arc-shaped along the circumferential direction of the cylindrical cavity 1011, and the convex arc protrudes in the direction away from the cylindrical cavity 1011. It is understood that since the cross-section of the cylindrical cavity 1011 is circular, the airflow rotates in a circular motion within the cylindrical cavity 1011. When the airflow flows through the outer periphery of the convexly arc-shaped chute 41, the convexly arc-shaped chute 41 can, to some extent, avoid excessive airflow loss caused by contact between the airflow and the chute 41. It is also understood that the chute 41 can extend in a straight line in the direction away from the cylindrical cavity 1011, in which case the guide plate 20 slides more smoothly on the chute 41. In practice, the position of the chute 41 should be adjusted according to the shape of the volute structure and the location of the air outlet 102.

[0051] In some other embodiments, such as the appendix Figure 3 As shown, along the height direction of the cylindrical cavity 1011 (as shown in the attached diagram) Figure 1 In the Z direction, a protruding section 103 is provided on the inner bottom wall of the accommodating cavity 101. The protruding section 103 protrudes along the height direction of the cylindrical cavity 1011. A sliding groove 41 is provided on the top of the protruding section 103, and the width of the protruding section 103 gradually decreases along the height direction of the cylindrical cavity 1011.

[0052] It is understandable that creating a groove 41 on the inner wall of the accommodating cavity 101 may reduce the structural strength of the main body 10, and in severe cases, the groove 41 may penetrate the main body 10, causing some airflow in the accommodating cavity 101 to exit along the groove 41, resulting in a reduction in the fan's airflow performance. Therefore, in this embodiment, a protruding section 103 is provided on the inner bottom wall of the accommodating cavity 101, and the groove 41 is located on the top of the protruding section 103. In addition, to avoid excessive airflow loss when the airflow interacts with the protruding section 103, in this embodiment, the width of the protruding section 103 gradually decreases along the height direction of the cylindrical cavity 1011, that is, the top of the protruding section 103 and the inner bottom wall of the accommodating cavity 101 are connected by an inclined surface. The inclined surface reduces the airflow loss on the protruding section 103.

[0053] Optionally, as shown in the appendix Figure 4 As shown, along the height direction of the cylindrical cavity 1011, a protruding section 103 is provided on the inner top wall surface of the accommodating cavity 101. The protruding section 103 protrudes in the opposite direction to the height direction of the cylindrical cavity 1011. A sliding groove 41 is provided at the bottom of the protruding section 103, and the width of the protruding section 103 gradually increases along the height direction of the cylindrical cavity 1011.

[0054] Similarly, the protruding section 103 can also be provided on the inner top wall of the accommodating cavity 101. In this case, the width of the protruding section 103 gradually increases along the height direction of the cylindrical cavity 1011. The bottom surface of the protruding section 103 and the inner top wall of the accommodating cavity 101 are also connected by an inclined surface, thereby reducing gas loss on the protruding section 103. Of course, in some embodiments, the protruding section 103 can be provided on both the inner top wall and the inner bottom wall of the accommodating cavity 101. In this case, there are two sliding grooves 41, and the guide plate 20 is slidably connected to the two sliding grooves 41, thereby improving the smoothness of the sliding of the guide plate 20.

[0055] As attached Figure 1 To be continued Figure 2As shown, the main body 10 comprises a first shell 11 and a second shell 12, the first shell 11 is connected with the second shell 12, and the accommodating cavity 101 is located between the first shell 11 and the second shell 12; the moving part 40 is arranged on the first shell 11 and the second shell 12, and the guide plate 20 is rotatably and movably connected to the moving part 40 through the rotating part 30.

[0056] In one specific embodiment, a first recess is formed on the first shell 11, a second recess is formed on the second shell 12, the first shell 11 is buckled with the second shell 12, so that the first recess and the second recess form the accommodating cavity 101. In addition, a protruding section 103 is arranged in each of the first recess and the second recess, a sliding groove 41 is formed on each protruding section 103, and two connecting shafts 31 are fixedly connected to the two ends of the guide plate 20 close to the first shell 11 and the second shell 12, respectively, and each connecting shaft 31 is rotatably and slidably connected in the corresponding sliding groove 41. The arrangement of the present embodiment improves the stability of the guide plate 20 in the accommodating cavity 101, and avoids the guide plate 20 from being separated from the accommodating cavity 101 when the guide plate 20 is subjected to excessive external force. On the other hand, the arrangement of the two sliding grooves 41 and the two connecting shafts 31 makes the guide plate 20 slide more smoothly on the sliding grooves 41, and the guide plate 20 can be moved to the designated position more quickly.

[0057] In some embodiments, the volute structure further comprises a driving assembly (not shown in the figure), which is connected with the guide plate 20 to at least drive the guide plate 20 to rotate in the accommodating cavity 101 and drive the guide plate 20 to move in the accommodating cavity 101.

[0058] Specifically, the driving assembly comprises a motor, which is connected with the guide plate 20 to drive the guide plate 20 and the connecting shaft 31 to slide and rotate in the sliding groove 41. In some embodiments, the fan further comprises a control board and a detection assembly, the control board, the motor and the detection assembly are electrically connected, when the detection assembly detects that the use scene of the fan changes or the working condition of the fan needs to be changed, the detection assembly sends different electric signals to the control board, the control board controls the position and the rotation angle of the guide plate 20 in the accommodating cavity 101 according to the different electric signals, and then the guide effect of the guide plate 20 in the new working scene or the new working condition is in the best state.

[0059] In some embodiments, the guide plate 20 comprises a rectangular plate. Specifically, the existing guide plate 20 usually adopts an arc-shaped plate, although the arc-shaped plate has better guide effect in certain application scenarios, but when the use scenario and working condition of the fan change, since the curvature radius of the arc-shaped surface on the arc-shaped plate cannot be changed, it will affect the arc-shaped surface on the arc-shaped plate when the motor is in different working conditions or different scenarios. In the present embodiment, since the rectangular plate is rotatably and movably arranged in the accommodating cavity 101, the rectangular plate can be set to the best guide position in different working conditions or environments, without the need to set an arc-shaped surface to enhance the guide effect of the guide plate 20. In addition, the rectangular plate is easy to manufacture, does not need to be additionally opened, has low manufacturing cost, and has strong adaptability.

[0060] In summary, the volute structure and fan of the present application at least have the following beneficial technical features:

[0061] (1) The first end of the guide plate 20 is rotatably and movably arranged on one side of the accommodating cavity 101 close to the air outlet 102, and the second end of the guide plate 20 extends in the direction from the accommodating cavity 101 to the air outlet 102, that is, the guide plate 20 is rotatably and movably arranged on one side of the accommodating cavity 101 close to the air outlet 102, so that when the working scenario outside the fan changes or when the working condition of the fan changes, the guide plate 20 can be adjusted again to make the guide plate 20 play the best guide role in the new working scenario or working condition, thereby reducing the noise of the fan, improving the air outlet efficiency of the fan, and greatly improving the adaptability of the fan, which can be applied to various scenarios.

[0062] (2) The guide plate 20 is rotatably connected to the inner wall surface of the accommodating cavity 101 through the rotating part 30, the guide plate 20 is movably connected to the moving part 40, and the rotation and movement of the guide plate 20 in the accommodating cavity 101 are independent of each other, so that the adjustable range of the guide plate 20 in the accommodating cavity 101 is wider, thereby improving the adaptability of the fan in different scenarios.

[0063] (3) The accommodating cavity 101 comprises a cylindrical cavity 1011 and an air outlet part 1012, the air outlet part 1012 is arranged on the outer periphery of the cylindrical cavity 1011 and is connected with the cylindrical cavity 1011, a sliding groove 41 is arranged between the cylindrical cavity 1011 and the air outlet part 1012, the sliding groove 41 extends in the direction away from the outer periphery of the cylindrical space, the sliding groove 41 is arranged between the cylindrical cavity 1011 and the air outlet part 1012, on the one hand, it is convenient for the guide plate 20 to adjust the position, so as to better guide the airflow in the cylindrical cavity 1011 out of the air outlet part 1012; on the other hand, the arrangement position of the sliding groove 41 will not cause too much interference between the airflow in the cylindrical cavity 1011 and the guide plate 20 on the sliding groove 41, thereby causing too much loss of the airflow, and finally reducing the air outlet performance of the fan.

[0064] For purposes of the description hereinafter, spatial

[0065] In addition, it should be noted that the terms "first", "second", and so on, used in the description and in the claims are used to differentiate between similar elements and are not necessarily used to describe a sequential or chronological order. Unless otherwise specified, the terms do not have a specific meaning and should not be construed as limiting the scope of the application.

[0066] The preferred embodiments of the application are shown and described above. However, the application can be modified and adapted in various ways and should not be interpreted as being limited to the specific embodiments described herein. Accordingly, other variations and modifications of the application are possible and are intended to be included within the scope of the application.

Claims

1. A volute structure, comprising a main body, a containing cavity and an air outlet are arranged in the main body, the air outlet is communicated with the containing cavity, characterized in that, The volute structure further comprises: A guide plate is arranged in the accommodating cavity, and a first end of the guide plate is rotatably and movably arranged on one side of the accommodating cavity close to the air outlet.

2. The volute structure according to claim 1, characterized by A rotating part is arranged on the guide plate, and the guide plate is rotatably connected to the inner wall surface of the accommodating cavity through the rotating part. A moving part is arranged on the main body, and the moving part is located on one side of the inner wall surface of the accommodating cavity close to the air outlet, and the guide plate is movably arranged on the moving part. The rotation and movement of the guide plate in the accommodating cavity are independent of each other.

3. The volute structure according to claim 2, characterized by The rotating part comprises a connecting shaft. One end of the connecting shaft is fixedly connected to the guide plate, and the other end of the connecting shaft is rotatably connected to the inner wall surface of the accommodating cavity. Alternatively, the connecting shaft is connected to the inner wall surface of the accommodating cavity, the guide plate is sleeved on the outer periphery of the connecting shaft, and can rotate around the connecting shaft.

4. The volute structure according to claim 3, characterized by The connecting shaft has a plurality of planes in the circumferential direction, and each plane is sequentially connected end to end in the circumferential direction of the connecting shaft. Alternatively, the connecting shaft is a cylindrical shaft.

5. The volute structure of claim 2, wherein The moving part comprises a sliding groove, and the guide plate is rotatably and movably connected to the sliding groove through the rotating part.

6. The volute structure according to claim 5, wherein The accommodating cavity comprises a cylindrical cavity and an air outlet part, the air outlet part is connected to the cylindrical cavity and arranged on the outer periphery of the cylindrical cavity, and the sliding groove is arranged between the cylindrical cavity and the air outlet part, and extends in the circumferential direction away from the cylindrical cavity.

7. The volute structure of claim 6, wherein In the height direction of the cylindrical cavity, a raised section is arranged on the inner bottom wall surface of the accommodating cavity, the raised section is raised in the height direction of the cylindrical cavity, the top of the raised section is provided with the sliding groove, and the width of the raised section gradually decreases in the height direction of the cylindrical cavity; and / or In the height direction of the cylindrical cavity, a raised section is arranged on the inner top wall surface of the accommodating cavity, the raised section is raised in the direction opposite to the height direction of the cylindrical cavity, the bottom of the raised section is provided with the sliding groove, and the width of the raised section gradually increases in the height direction of the cylindrical cavity.

8. The volute structure according to any one of claims 2 to 7, characterized by, The main body comprises a first shell and a second shell, the first shell is connected to the second shell, and the accommodating cavity is located between the first shell and the second shell. The moving part is arranged on the first shell and the second shell, and the guide plate is rotatably and movably connected to the moving part through the rotating part.

9. The volute structure according to any one of claims 1 to 7, characterized by, The volute structure further comprises a driving assembly connected to the guide plate, for driving the guide plate to rotate in the accommodating cavity and driving the guide plate to move in the accommodating cavity.

10. A fan, characterized by The fan comprises the volute structure according to any one of claims 1 to 9.

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