Air guiding structure, fan

Abstract

The present invention relates to the field of fan technology, and specifically to an air guide structure and a fan. An air guide structure includes: a frame arranged below an air outlet grille along the outflow direction of airflow, an annular flow channel formed in the frame; a plurality of guide vanes arranged radially in the annular flow channel, a lever is arranged on one end of the guide vane close to the center of the annular flow channel, and an external force drives the lever to drive the guide vane to rotate with the radial direction of the guide vane 4 as the rotation center; wherein, a plurality of guide vanes have a first state of closing the annular flow channel and a second state of opening the annular flow channel at a preset rotation angle. In the present invention, a guide vane is arranged below the air outlet grille, and the guide vane can rotate in the annular air channel by external force toggling the lever. When the fan is not working, the guide vane rotates, and a plurality of guide vanes are spliced ​​to achieve the closure of the annular air channel, thereby preventing dust from entering the air duct through the air outlet of the air outlet grille and affecting the use of the fan.

Description

Technical Field

[0001] The present invention relates to the technical field of fans, and particularly to a wind guiding structure and a fan. Background Art

[0002] The main structure of an air circulation fan includes a drive motor, a turbo fan, a guide grille, and a cylindrical housing. The air circulation fan can blow air in a spiral shape along a certain direction. With the agitation of the fan blades, a spiral columnar air flow can be finally formed. The air blown by the air circulation fan has a relatively long distance and good directivity.

[0003] In the existing air circulation fan, the guide grille is installed at the axial air outlet. When the circulation fan is in a non-working state, external dust easily enters the air duct through the guide grille and deposits on the impeller and the fan downstream of the air duct, affecting the service life of the fan and easily causing noise generation. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect that dust easily enters at the axial air outlet of the existing circulation fan, so as to provide a wind guiding structure and a fan.

[0005] To solve the above problems, the present invention provides a wind guiding structure, including: a frame body disposed below the air outlet grille along the air flow outflow direction, an annular flow channel being formed inside the frame body; a plurality of guide vanes radially arranged inside the annular flow channel, a lever being provided at one end of the guide vane close to the center of the annular flow channel, and an external force driving the lever to drive the guide vane to rotate around the radial direction of the guide vane as the rotation center; wherein, the plurality of guide vanes have a first state of closing the annular flow channel and a second state of opening the annular flow channel when rotated by a preset angle.

[0006] Optionally, the frame body includes a first frame body and a second frame body that are butt-jointed with each other;

[0007] The first frame body has an annular first frame edge and a first central axis disposed at the center of the first frame edge;

[0008] The second frame body has an annular second frame edge and a second central axis disposed at the center of the second frame edge;

[0009] The annular flow channel is formed between the first frame edge and the first central axis, and between the second frame edge and the second central axis.

[0010] Optionally, the guide vane is configured as a fan ring structure, and a first rotating part and a second rotating part are respectively provided on two opposite arc edges of the guide vane;

[0011] The first central axis is provided with a plurality of first rotation grooves along its circumference, and the second rotation part is rotatably provided on the first rotation grooves;

[0012] The second frame is provided with a plurality of second rotation grooves along its circumference, and the first rotation part is rotatably provided on the second rotation grooves.

[0013] Optionally, a plurality of lateral air outlets are arranged on the peripheral surface of the second frame.

[0014] Optionally, in the outflow direction of the airflow, the first rotating groove is arranged below the second rotating groove.

[0015] Optionally, a driving assembly is further included, the guide plate is provided with the shifting rod, and the driving assembly drives the shifting rod.

[0016] Optionally, the lever comprises:

[0017] a connecting portion disposed on the second rotating portion;

[0018] And a toggle part is vertically arranged on the connecting part, and the driving component drives the toggle part.

[0019] Optionally, the first central shaft is constructed as a hollow structure, and the drive assembly is disposed in the first central shaft.

[0020] Optionally, the driving assembly comprises:

[0021] A driving motor is arranged in the first central shaft, and a gear is arranged on the driving motor;

[0022] A rotating disk is arranged between the first central axis and the second central axis, a plurality of shifting teeth are arranged at intervals in the circumferential direction of the rotating disk, a shifting groove is formed between two adjacent shifting teeth, and the shifting part is clamped in the shifting groove;

[0023] The rotating disk further includes a tooth portion meshing with the gear.

[0024] Optionally, a limiting plate is provided on a side of the toggle slot close to the second frame body, and the limiting plate is used to limit the toggle part from being separated from the toggle slot.

[0025] Optionally, the driving assembly further comprises a connecting member arranged between the driving motor and the turntable, the connecting member is protrudingly provided with a rotating shaft, and the turntable and the second central axis are respectively provided with a first shaft hole and a second shaft hole for the rotating shaft to pass through.

[0026] Optionally, a limiting block is protruding from the end surface of the connecting member facing the turntable, and a limiting hole cooperating with the limiting block is provided on the turntable to limit the rotation angle of the turntable.

[0027] The present invention further provides a fan, comprising: the wind guide structure described in any one of the above.

[0028] The technical solution of the present invention has the following advantages:

[0029] 1. The air guide structure of the present invention comprises: a frame body arranged below the air outlet grille along the outflow direction of the air flow, an annular flow channel formed in the frame body; a plurality of guide vanes radially arranged in the annular flow channel, a lever being arranged on one end of the guide vane close to the center of the annular flow channel, the lever being driven by an external force to drive the guide vane to rotate with the radial direction of the guide vane as the rotation center; wherein, the plurality of guide vanes have a first state of closing the annular flow channel and a second state of opening the annular flow channel at a preset rotation angle.

[0030] In the present invention, a guide vane is arranged below the air outlet grille, and the guide vane can rotate in the annular air duct by pushing a lever with external force. When the fan is not working, the guide vane rotates, and a plurality of guide vanes are spliced ​​to achieve the closure of the annular air duct, thereby preventing dust from entering the air duct through the air outlet of the air outlet grille and affecting the use of the fan, etc.

[0031] 2. In the air guide structure of the present invention, a plurality of lateral air outlets are arranged on the peripheral surface of the second frame, and the arrangement of the lateral air outlets increases the air outlet angle of the fan.

[0032] 3. In the air guide structure of the present invention, the first rotating groove is arranged below the second rotating groove in the direction of the airflow outflow. The first rotating groove is arranged lower than the second rotating groove, so that the guide plate installed on the first rotating groove and the second rotating groove is tilted toward one end of the second frame. When the guide plate is in a closed state, the airflow can be better guided to the side air outlet, thereby increasing the air volume of the side air outlet and reducing the noise generated by the collision between the airflow and the air duct wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 An exploded view of the air guide structure in Example 1 provided by the present invention;

[0035] Figure 2 A schematic structural diagram of a guide vane in a first state in Embodiment 1 provided by the present invention;

[0036] Figure 3 A schematic diagram of the structure of the guide vane in the second state in Embodiment 1 provided by the present invention;

[0037] Figure 4 A schematic structural diagram of the first frame body in Embodiment 1 provided by the present invention;

[0038] Figure 5 A schematic structural diagram of the second frame in Embodiment 1 provided by the present invention;

[0039] Figure 6 A schematic diagram of the structure of the guide vane in Embodiment 1 provided by the present invention;

[0040] Figure 7 A schematic diagram of a closed state of the guide vane in Embodiment 1 provided by the present invention;

[0041] Figure 8 A schematic diagram of the structure of the turntable in Embodiment 1 provided by the present invention;

[0042] Figure 9 A schematic diagram of the structure of the air outlet grille in Embodiment 1 provided by the present invention;

[0043] Figure 10 A schematic diagram of the structure of the connecting member in Example 1 provided by the present invention;

[0044] Figure 11 A schematic diagram of the structure of the driving motor in Embodiment 1 provided by the present invention;

[0045] Figure 12 This is a cross-sectional view of the air guide structure in Example 1 provided by the present invention.

[0046] Description of reference numerals:

[0047] 1-Air outlet grille;

[0048] 2-first frame; 21-first frame; 22-first central axis; 221-first rotation slot;

[0049] 3-second frame; 31-second frame; 32-second central axis; 311-second rotation slot; 312-lateral air outlet; 321-annular slot; 322-second axis hole;

[0050] 4-guide vane; 41-first rotating part; 42-second rotating part; 43-shift lever; 431-connecting part; 432-shifting part;

[0051] 5 - driving assembly; 51 - driving motor; 52 - gear; 53 - turntable; 531 - shifting gear; 532 - tooth portion; 533 - first shaft hole; 534 - limiting hole; 535 - shifting slot; 536 - limiting plate; 54 - connecting piece; 541 - rotating shaft; 542 - limiting block. DETAILED DESCRIPTION

[0052] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0053] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0054] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0056] Example 1

[0057] like Figures 1 to 12 As shown, an air guide structure provided by the present embodiment is a frame body arranged below the air outlet grille 1 along the outflow direction of the air flow, and an annular flow channel is formed in the frame body; a plurality of guide vanes 4 are radially arranged in the annular flow channel, and a lever 43 is arranged on one end of the guide vane 4 close to the center of the annular flow channel, and an external force drives the lever 43 to drive the guide vane 4 to rotate with the radial direction of the guide vane 4 as the rotation center; wherein, the plurality of guide vanes 4 have a first state of closing the annular flow channel and a second state of opening the annular flow channel at a preset rotation angle.

[0058] The air guiding structure in this embodiment is used on a circulation fan. A fan is provided at the lower air inlet of the circulation fan to introduce external air flow into the air duct and discharge it to the outside through the air outlet grid in this embodiment. The frame body in this embodiment is part of the air duct of the entire circulation fan, and an annular flow channel is formed therein to facilitate the closing of the air duct by the guide vanes.

[0059] In the axial direction of the circulation fan, the air guiding structure in this embodiment realizes the opening and closing of the air duct in the axial direction. Specifically, when the air duct in the axial direction needs to be opened, as Figure 3 shown, under the drive of an external force, the guide vane 4 rotates by a certain angle. Here, the angle is the included angle between the blade surface of the guide vane and the fluid flow direction. When the above included angle is not 90 degrees, the air duct is in an open state. When it is 90 degrees, several guide vanes are butted together to realize the closing of the annular flow channel.

[0060] Therefore, in this embodiment, guide vanes are provided below the air outlet grille. The guide vanes can rotate in the annular air duct. When the fan is not working, the guide vanes rotate, and several guide vanes are spliced together to realize the closing of the annular air duct, thereby preventing dust from entering the air duct through the air outlet of the air outlet grille and affecting the use of the fan and the like.

[0061] The frame body in this embodiment includes two parts, a first frame body 2 and a second frame body 3 that are butted against each other, as Figure 4 and Figure 5 shown, which shows the specific structures of the first frame body 2 and the second frame body 3:

[0062] As Figure 4 shown, the first frame body 2 has an annular first frame edge 21. An installation groove is provided at the upper end of the first frame edge 21, and the air outlet grille is installed in the installation groove on the first frame edge 21. A first central axis 22 is provided at the center of the first frame edge 21. A number of spokes are bridged between the circumferential surface of the first central axis 22 and the inner side surface of the first frame edge 21. In this embodiment, the number of spokes is four. As a variation, other numbers of spokes are also possible as long as they can support and fix the first central axis 22.

[0063] As Figure 5 shown, the second frame body 3 has an annular second frame edge 31. An installation hole is machined at the upper end of the second frame edge 31 and is fitted and installed with the lower end surface of the first frame edge 21. A second central axis 32 is provided at the center of the second frame edge 31; a number of spokes are bridged between the circumferential surface of the second central axis 32 and the inner side surface of the second frame edge 31. In this embodiment, the number of spokes is four. As a variation, other numbers of spokes are also possible as long as they can support and fix the second central axis 32.

[0064] Therefore, in this embodiment, an annular flow channel is formed between the inner side surface of the first frame 21 and the peripheral surface of the first central axis 22, and between the inner side surface of the second frame 31 and the peripheral surface of the second central axis 32 for the airflow from the fan to pass through.

[0065] Further, in this embodiment, a plurality of lateral air outlets 312 are provided on the peripheral surface of the second frame 31 to increase the air outlet angle of the fan.

[0066] As Figure 6 shown, the specific structure of the guide vane 4 is shown. In this embodiment, the guide vane 4 is configured as a sector ring structure. First rotation parts 41 and second rotation parts 42 are respectively arranged on two opposite arc edges of the guide vane 4, and both the first rotation part 41 and the second rotation part 42 are shaft structures. The sector ring structure in this embodiment is simple to process, and the sector ring structures can be assembled into a circular ring structure to better fit the annular flow channel and block the annular flow channel, thereby improving the sealing performance of the annular flow channel and the dust prevention effect.

[0067] The guide vane 4 in this embodiment is installed on the first frame body 2 and the second frame body 3. Specifically, as Figure 4 shown, a plurality of first rotation grooves 221 are arranged along the circumferential direction of the first central axis 22. The second rotation part 42 is rotatably arranged on the first rotation groove 221. While the first rotation groove 221 realizes the support of the second rotation part 42, the second rotation part 42 can rotate in the first rotation groove 221, with a simple structure and convenient installation of the guide vane.

[0068] Similarly, as Figure 5 shown, a plurality of second rotation grooves 311 are arranged along the circumferential direction of the second frame 31. The first rotation part 41 is rotatably arranged on the second rotation groove 311. The second rotation groove 311 can also realize the support of the first rotation part 41, with a simple structure and convenient installation of the guide vane.

[0069] Further, in this embodiment, in the airflow outflow direction, the first rotation groove 221 is arranged below the second rotation groove 311. The first rotation groove 221 is arranged lower than the second rotation groove, resulting in one end of the guide vane installed on the first rotation groove 221 and the second rotation groove tilting towards the second frame body 3. When the guide vane 4 is in the closed state, the airflow can be better guided to the lateral air outlet, increasing the air volume of the lateral air outlet and reducing the noise generated by the collision of the airflow with the duct wall at the same time.

[0070] In this embodiment, in order to facilitate the driving of the guide vane, a driving assembly 5 is further included, as Figure 6As shown, a lever 43 is provided at the axial end of the second rotating part 42 away from the body of the guide vane 4, and the driving assembly 5 drives the lever 43, and the guide vane 4 is driven by the driving assembly 5. The lever 43 in this embodiment includes: a connecting portion 431 provided on the second rotating part 42, the connecting portion 431 is a long strip plate structure integrally formed at the axial end of the second rotating part 42; and a toggle portion 432 vertically provided on the connecting portion 431, the toggle portion 432 is a common cylindrical rod structure, and the driving assembly 5 drives the toggle portion 432.

[0071] In this embodiment, the first central axis 22 is constructed as a hollow structure. The driving assembly 5 is arranged in the first central axis 22 . The first central axis 22 cover is arranged on the driving assembly 5 , which can prevent the driving assembly 5 from dust.

[0072] like Figure 8 As shown, the driving assembly 5 includes: a driving motor 51, which is arranged in the first central axis 22, and a gear 52 is arranged on the driving motor 51. The gear 52 is installed on the motor shaft of the driving motor 51 in an interference fit or keyed manner. A turntable 53 is arranged between the first central axis 22 and the second central axis 32. A plurality of shifting teeth 531 are processed on the circumference of the turntable 53. There is a gap between two adjacent shifting teeth, and the gap space forms a shifting groove 535. The shifting part 432 is clamped in the shifting groove 535. When the turntable 53 rotates, the shifting rod 43 clamped in the shifting groove 535 is driven to rotate. Further, the middle position of the turntable is processed into a half-moon notch, and a tooth part 532 meshing with the gear 52 is processed on the inner side of the notch. The gear 52 is driven to rotate by the driving motor 51, and the gear 52 drives the turntable 53 to rotate through the tooth part 532. The turntable 53 drives the guide vane 4 to rotate through the shifting teeth 531, thereby realizing the adjustment of the rotation angle of the guide vane 4.

[0073] On the basis of the above embodiment, as a further limitation, a limit plate 536 is provided on the side of the toggle slot 535 close to the second frame body, and the limit plate 536 is connected between the two toggle teeth 531. When the toggle part 432 rotates in the toggle slot 535, the limit plate 536 can constrain the movement stroke of the toggle part 432 to limit the toggle part 432 from disengaging from the toggle slot 535.

[0074] like Figure 10As shown, the driving assembly 5 further includes a connecting member 54 disposed between the driving motor 51 and the turntable 53. A rotating shaft 541 protrudes from the connecting member 54. A first shaft hole 533 and a second shaft hole 322 for the rotating shaft 541 to pass through are respectively provided on the turntable 53 and the second central shaft 32. First, the driving motor 51 is locked to the connecting member 54 by screws, and a through hole for the motor shaft to pass through is machined on the connecting member 54. The second shaft hole 322 is a blind hole structure, the shaft end of the rotating shaft 541 abuts against the blind hole, the upper end of the first central shaft 22 is open, and when the air outlet grille 1 is installed on the first housing 2, it presses against the driving motor, and then the connecting member 54 is abutted against the second shaft hole 322 of the second central shaft 32, realizing the fixation of the connecting member 54. The turntable 53 is rotatably installed between the upper end faces of the connecting member 54 and the second central shaft 32.

[0075] As Figure 8 and as Figure 10 As shown, a limiting block 542 protrudes from the end face of the connecting member 54 facing the turntable 53. A limiting hole 534 that cooperates with the limiting block 542 is provided on the turntable 53. The limiting hole 534 is an arc hole. When installing the connecting member 54, the limiting block 542 is movably inserted into the limiting hole 534 and can move in the limiting hole 534. When the turntable 53 rotates a certain angle, the limiting block 543 thereon will be blocked by the limiting hole 534 to limit the rotation angle of the turntable 53. Further, by setting the size of the arc hole, the rotation angle range of the turntable 3 can be adjusted.

[0076] Embodiment 2

[0077] This embodiment provides a fan, specifically a circulation fan, which includes the air guiding structure in the above embodiment and has all its technical advantages, which will not be elaborated here one by one.

[0078] Obviously, the above embodiments are merely examples for clear illustration and not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. The obvious changes or variations derived therefrom still fall within the protection scope of the present invention.

Claims

1. An air guiding structure, characterized in that, include: A frame body is arranged below the air outlet grille (1) along the outflow direction of the airflow, wherein an annular flow channel is formed in the frame body; A plurality of guide vanes (4) are radially arranged in the annular flow channel, and a lever (43) is arranged on one end of the guide vane (4) close to the center of the annular flow channel; An external force drives the lever (43) to drive the guide vane (4) to rotate with the radiation direction of the guide vane (4) as the rotation center; Wherein, a plurality of the guide plates (4) have a first state of closing the annular flow channel and a second state of opening the annular flow channel when rotated at a preset angle, and the frame comprises a first frame (2) and a second frame (3) that are butt-jointed with each other; The first frame (2) comprises a first annular frame (21) and a first central axis (22) arranged at the center of the first frame (21); The second frame (3) has an annular second frame (31) and a second central axis (32) arranged at the center of the second frame (31); The annular flow channel is formed between the first frame (21) and the first central axis (22), and between the second frame (31) and the second central axis (32); the guide vane (4) is constructed as a fan-ring structure; and a first rotating portion (41) and a second rotating portion (42) are respectively provided on two opposite arc edges of the guide vane (4); A plurality of first rotation grooves (221) are arranged on the first central shaft (22) along its circumference, and the second rotation portion (42) is rotatably arranged on the first rotation grooves (221); A plurality of second rotation grooves (311) are arranged on the second frame (31) along its circumference, the first rotation portion (41) is rotatably arranged on the second rotation groove (311), a plurality of lateral air outlets (312) are arranged on the circumference of the second frame (31), and the first rotation groove (221) is arranged below the second rotation groove (311) in the outflow direction of the airflow.

2. The air guiding structure according to claim 1, characterized in that, It also comprises a driving assembly (5), the guide plate (4) being provided with the shifting rod (43), and the driving assembly (5) driving the shifting rod (43).

3. The air guiding structure according to claim 2, characterized in that, The lever (43) comprises: a connecting portion (431) arranged on the second rotating portion (42); and a toggle portion (432) vertically arranged on the connecting portion (431), wherein the driving assembly (5) drives the toggle portion (432).

4. The air guiding structure according to claim 2, characterized in that, The first central shaft (22) is constructed as a hollow structure, and the drive assembly (5) is arranged inside the first central shaft (22).

5. The air guiding structure according to claim 3, characterized in that, The driving component (5) comprises: A drive motor (51) is arranged in the first central shaft (22), and a gear (52) is arranged on the drive motor (51); A rotating disk (53) is arranged between the first central axis (22) and the second central axis (32); a plurality of shifting teeth (531) are arranged at intervals in the circumferential direction of the rotating disk (53); a shifting groove (535) is formed between two adjacent shifting teeth; and the shifting portion (432) is clamped in the shifting groove (535); The rotating disk (53) further comprises a tooth portion (532) meshing with the gear (52).

6. The air guiding structure according to claim 5, characterized in that, A limiting plate (536) is provided on a side of the toggle groove (535) close to the second frame body (3), and the limiting plate (536) is used to limit the toggle portion (432) from leaving the toggle groove (535).

7. The air guiding structure according to claim 5, characterized in that, The driving assembly (5) further comprises a connecting member (54) arranged between the driving motor (51) and the rotating disk (53), a rotating shaft (541) being protrudingly arranged on the connecting member (54), and a first shaft hole (533) and a second shaft hole (322) for the rotating shaft (541) to pass through are respectively arranged on the rotating disk (53) and the second central shaft (32).

8. The air guiding structure according to claim 7, characterized in that, A limit block (542) is protrudingly provided on the end surface of the connecting member (54) facing the rotating disk (53), and a limit hole (534) cooperating with the limit block (542) is provided on the rotating disk (53) to limit the rotation angle of the rotating disk (53).

9. A fan, characterized in that, include: The wind guide structure according to any one of claims 1 to 8.

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