An air supply device

Abstract

This utility model provides an air supply device, including an air supply section and a baffle. The air supply section has an air outlet, and the baffle is disposed in front of the air outlet, with the baffle and the air supply section spaced apart to allow airflow from the air outlet to flow out through the gap between the baffle and the air supply section. Furthermore, an airflow guide groove is provided on the surface of the baffle facing the air outlet, configured to guide the airflow from the air outlet outwards. By providing a spiral groove-shaped airflow guide groove on the baffle, the airflow blown from the air outlet onto the new panel is evenly distributed to all sides, reducing wind resistance while increasing airflow, achieving the beneficial effects of reducing noise and increasing airflow, thus improving the user experience.

Description

Technical Field

[0001] This utility model relates to the field of air supply equipment technology, and in particular to an air supply device. Background Technology

[0002] Air supply devices generally refer to equipment or systems used to deliver air or other gases to a specific area or device. These devices are commonly used in ventilation, air conditioning, HVAC systems, and industrial production processes. Specifically, a fresh air system is also a type of air supply device. It uses mechanical means to exchange indoor and outdoor air to improve indoor air quality. Its core objectives are ventilation, air purification, and temperature and humidity control, while also considering energy efficiency and comfort.

[0003] In existing fresh air systems, an indoor panel is installed on one side of the indoor air outlet. The indoor panel is usually flat, and the air volume depends largely on the fan structure and motor selection inside the fan. The fan brings outdoor air into the room and blows it toward the indoor panel. However, the flat indoor panel causes a lot of air resistance to the airflow into the room and generates noise. The high air resistance also reduces the air volume accordingly. Utility Model Content

[0004] In view of the above problems, this utility model is proposed to provide an air supply device that overcomes or at least partially solves the above problems, which can reduce wind resistance, increase air volume, and reduce noise, thereby improving the user experience.

[0005] Specifically, this utility model provides an air supply device, comprising:

[0006] The air supply unit has an air outlet;

[0007] A baffle is disposed on the front side of the air outlet, and the baffle is spaced apart from the air supply section so that the airflow from the air outlet flows out through the gap between the baffle and the air supply section; and

[0008] An airflow guide groove is provided on the surface of the baffle facing the air outlet.

[0009] Optionally, the inner end of the airflow guide groove is located at or near the center of the baffle plate opposite to the air outlet;

[0010] The airflow guide groove bends and extends from its inner end to its outer end.

[0011] Optionally, the baffle includes:

[0012] A first windbreak area is located in front of the air outlet, and the airflow guide groove is located on the surface of the first windbreak area facing the air outlet.

[0013] Optionally, the baffle further includes:

[0014] The second windbreak area is connected to the edge of the first windbreak area and is located outside the first windbreak area; the surface of the second windbreak area facing the air outlet is located in front of the outlet of the airflow guide channel.

[0015] Optionally, the edge of the baffle is provided with a flange that bends toward the air supply section.

[0016] Optionally, the surface of the first windbreak area facing the air outlet includes:

[0017] The central area, the center of which is directly opposite the center of the air outlet;

[0018] The air guiding area is connected to the central area and located outside the central area; the air guiding area is concave; the airflow guide groove is disposed on the air guiding area, the inner end of the airflow guide groove is located at the connection between the central area and the air guiding area; the outer end of the airflow guide groove is located at the outer edge of the air guiding area.

[0019] Optionally, the central region may be planar or convex.

[0020] Optionally, the first windbreak area is circular, and the air outlet is square or circular;

[0021] The edge of the first windbreak area is aligned with the edge of the air outlet, or is located outside the edge of the air outlet.

[0022] Optionally, the airflow guide groove is a spiral groove;

[0023] The airflow guide channels are multiple and are evenly distributed along the circumferential direction of the air outlet.

[0024] Optionally, the air supply unit also has an air inlet that is connected to the outside to introduce fresh air;

[0025] The air supply unit also has a fan that promotes airflow from the air inlet to the air outlet, and the fan is an axial flow fan; the rotation direction of the fan is consistent with the rotation direction of the airflow guide groove.

[0026] Optionally, the air supply unit further includes:

[0027] The housing, wherein the air outlet is disposed on the housing;

[0028] Multiple oscillating blades are disposed at the air outlet; each oscillating blade is rotatably mounted on the housing via a first rotating shaft, and each oscillating blade is also provided with a second rotating shaft, the second rotating shaft being arranged parallel to the first rotating shaft; the housing is provided with an arc-shaped groove for guiding the movement of the second rotating shaft, the arc-shaped groove being coaxial with the first rotating shaft; the second rotating shaft is inserted into the arc-shaped groove;

[0029] A connecting rod is connected to the plurality of oscillating blades; the connecting rod is movably disposed on the housing along the arrangement direction of the plurality of oscillating blades; the connecting rod is provided with a sliding groove extending along the axial direction of the air outlet, and the second rotating shaft is inserted into the sliding groove.

[0030] In the air supply device of this utility model, the airflow guide groove set on the baffle guides the airflow when it blows from the air outlet toward the baffle, so that the airflow no longer spreads freely after contacting the traditional panel, but spreads evenly to the surroundings, which can reduce wind resistance, increase air volume, and reduce noise, thereby improving the user experience.

[0031] Furthermore, in the air supply device of this invention, when the air supply device stops working, dust inevitably accumulates inside the baffle and the airflow guide channel due to the contact between the baffle and the indoor air. When the air supply device is started, the airflow passing through the airflow guide channel will flow from the inside to the outside along the set path of the airflow guide channel, and the airflow will form a cleaning effect along the airflow guide channel, reducing the deposition of dust on the surface of the baffle and inside the airflow guide channel. Moreover, the three-dimensional texture of the airflow guide channel acts as a reinforcing rib, improving the baffle's resistance to deformation and preventing the baffle from vibrating, making noise, or even deforming under the impact of high-speed airflow.

[0032] Furthermore, in the air supply device of this utility model, the airflow channel formed by the concave structure on the air guide area allows the airflow to smoothly turn along the surface of the air guide area, which can effectively reduce the friction between the airflow and the baffle, reduce the air supply resistance, improve the air supply smoothness, and reduce the noise generated by friction.

[0033] Furthermore, in the air supply device of this utility model, when the central area is planar, the designed surface is easy to process and has low cost. When the central area is convex, the airflow flowing towards the central area will be guided and diffused by the convexity. Combined with the airflow guide groove in the air guide area, it can facilitate the diffusion of airflow into the room. It is suitable for places with high comfort requirements. In addition, setting the central area as a convex shape can also form a "reinforcing rib" effect, improve the rigidity of the baffle, and its resistance to deformation is better than that of a planar surface.

[0034] The above and other objects, advantages and features of this utility model will become more apparent to those skilled in the art from the following detailed description of specific embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0035] The following sections will describe some specific embodiments of the present invention in a detailed manner by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or components. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0036] Figure 1 This is a schematic structural diagram of an air supply device according to an embodiment of the present utility model;

[0037] Figure 2 This is a schematic cross-sectional view of an air supply device according to an embodiment of the present invention;

[0038] Figure 3 This is a schematic structural diagram of a baffle in an air supply device according to an embodiment of the present utility model;

[0039] Figure 4 This is a schematic cross-sectional view of a baffle in an air supply device according to an embodiment of the present invention;

[0040] Figure 5 This is a schematic structural diagram of the air supply section in an air supply device according to an embodiment of the present utility model;

[0041] Figure 6 This is a schematic structural diagram of the oscillating blades in an air supply device according to an embodiment of the present utility model;

[0042] Figure 7 This is a schematic partial structural diagram of an air supply device according to an embodiment of the present utility model, which shows a drive mechanism, connecting rod, swing blade, first rotating shaft, second rotating shaft, slide groove, and arc groove;

[0043] Figure 8 This is a schematic diagram of the simulation results of an air supply device according to an embodiment of the present invention;

[0044] Figure 9 This is a schematic diagram of the simulation results of an existing air supply device. Detailed Implementation

[0045] The following reference Figures 1 to 9This description describes an air supply device according to an embodiment of the present invention. In this description, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature, that is, include one or more of that feature. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. When a feature "includes or contains" one or more of the features it encompasses, unless otherwise specifically described, this indicates that other features are not excluded and may be further included.

[0046] Unless otherwise expressly specified and limited, the terms "set," "install," "connect," "link," "fix," and "couple" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art should be able to understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0047] Furthermore, in the description of this embodiment, "above" or "below" the second feature can include direct contact between the first and second features, or it can include contact between the first and second features through another feature between them. That is, in the description of this embodiment, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," or "below" of the second feature can mean the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0048] In the description of this embodiment, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0049] Figure 1 This is a schematic structural diagram of an air supply device according to an embodiment of the present invention, such as... Figure 1 As shown, and with reference Figures 2 to 8 This utility model provides an air supply device, including an air supply section 100 and a baffle 200. The air supply section 100 has an air outlet 110. The baffle 200 is disposed on the front side of the air outlet 110, and the baffle 200 and the air supply section 100 are spaced apart so that the airflow from the air outlet 110 flows out through the gap between the baffle 200 and the air supply section 100. An airflow guide groove 210 is provided on the surface of the baffle 200 facing the air outlet 110. The inner end of the airflow guide groove 210 is located at or near the center of the baffle 200 opposite to the air outlet 110, and the airflow guide groove 210 bends and extends from its inner end to its outer end.

[0050] When the air supply device of this utility model is in operation, the air supply unit 100 delivers air forward through the air outlet 110. The airflow direction changes under the action of the baffle 200, and at the same time, it is evenly diffused to the surroundings under the action of the airflow guide groove 210. In other words, in the air supply device of this utility model, due to the airflow guide groove 210 provided on the baffle 200, the airflow from the air outlet 110 is guided when it blows towards the baffle 200, so that the airflow does not diffuse after contacting the traditional panel, but is evenly diffused to the surroundings. This reduces wind resistance, increases air volume, and reduces noise, thereby improving the user experience.

[0051] Furthermore, when the air supply device stops working, dust inevitably accumulates inside the baffle 200 and the airflow guide channel 210 due to the contact between the baffle 200 and the indoor air. When the air supply device is activated, the airflow passing through the airflow guide channel 210 will flow from the inside to the outside along the path set by the airflow guide channel 210, creating a cleaning effect and reducing dust deposition on the surface of the baffle 200 and inside the airflow guide channel 210. Moreover, the three-dimensional texture of the airflow guide channel 210 acts as a reinforcing rib, improving the baffle 200's resistance to deformation and preventing vibration, noise, or even deformation of the baffle 200 under the impact of high-speed airflow.

[0052] In some embodiments of this utility model, such as Figure 3 As shown, the baffle 200 includes a first wind-blocking area 220. The first wind-blocking area 220 is disposed on the front side of the air outlet 110, and the airflow guide groove 210 is disposed on the surface of the first wind-blocking area 220 facing the air outlet 110. When the airflow flows out from the air outlet 110, it first contacts the first wind-blocking area 220, and the airflow guide groove 210 guides the airflow to flow along the airflow guide groove 210, evenly dispersing the airflow.

[0053] In some embodiments of this utility model, such as Figure 3As shown, the baffle 200 also includes a second windbreak region 230. The second windbreak region 230 is connected to the edge of the first windbreak region 220 and is located outside the first windbreak region 220. The surface of the second windbreak region 230 facing the air outlet 110 is located in front of the outlet of the airflow guide channel 210. The second windbreak region 230 allows the airflow to diffuse towards the edge of the baffle, guiding the airflow to a position further away from the air outlet 110. Furthermore, the fact that the surface of the second windbreak region 230 facing the air outlet 110 is located in front of the outlet of the airflow guide channel 210 prevents the second windbreak region 230 from obstructing the airflow, ensuring smooth air delivery.

[0054] In some embodiments of this utility model, such as Figure 3 and Figure 4 As shown, the edge of the baffle 200 is provided with a flange 240 that bends towards the air supply section 100. The flange 240 is provided at the edge of the baffle 200. The rear edge of the flange 240 may be on the same plane as the outer edge of the surface of the first windproof area 220 facing the air outlet.

[0055] In some embodiments of this utility model, such as Figure 3 and Figure 4 As shown, the surface of the first windbreak area 220 facing the air outlet 110 includes a central area 221 and a guide area 222. The center of the central area 221 is directly opposite the center of the air outlet 110. The guide area 222 is connected to the central area 221 and is located outside the central area 221. An airflow guide channel 210 is disposed on the guide area 222. The inner end of the airflow guide channel 210 is located at the junction of the central area 221 and the guide area 222, and the outer end of the airflow guide channel 210 is located at the outer edge of the guide area 222. By setting the central area 221 and the guide area 222, the airflow guide channel 210 can guide the airflow, making the airflow evenly dispersed in all directions.

[0056] In some embodiments of this invention, the edge of the air guiding region 222 connected to the central region 221 is flush with the outer edge of the air guiding region 222. In some preferred embodiments of this invention, such as... Figure 4 As shown, the edge of the air guide region 222, which connects to the central region 221, is located behind the outer edge of the air guide region 222. This arrangement is more conducive to guiding airflow and reducing noise.

[0057] In some preferred embodiments of this invention, the air guiding region 222 is recessed to form a rearward-facing annular groove. Specifically, the edge of the air guiding region 222 connecting to the central region 221 is flush with the outer edge of the air guiding region 222. The airflow channel formed by the recessed structure on the air guiding region 222 allows the airflow to smoothly change direction along the surface of the air guiding region 222, effectively reducing friction between the airflow and the baffle 200 and lowering noise generated by friction. Optionally, in some embodiments of this invention, the edge of the air guiding region 222 connecting to the central region 221 is located behind the outer edge of the air guiding region 222, and the air guiding region 222 may also be recessed.

[0058] In some embodiments of this utility model, such as Figure 4 As shown, the central region 221 is planar. When the central region 221 is planar, the surface is easy to process and the cost is low. In some embodiments of this utility model, the central region 221 is planar or convex. When the central region 221 is convex, the airflow flowing towards the central region 221 will be guided and diffused by the convexity. Combined with the airflow guide groove 210 of the air guide region 222, it can facilitate the diffusion of airflow into the room. It is suitable for places with high comfort requirements. In addition, setting the central region 221 as a convex shape can also form a "reinforcing rib" effect, improve the rigidity of the baffle 200, and its resistance to deformation is better than that of a planar shape. Users can flexibly choose the shape of the central region 221 according to specific usage scenarios.

[0059] In some embodiments of this utility model, such as Figure 3 and Figure 4 As shown, the first windbreak area 220 is circular, and the air outlet 110 is square or circular. The edge of the first windbreak area 220 is aligned with the edge of the air outlet 110, or is located outside the edge of the air outlet 110. This arrangement ensures that the area of ​​the first windbreak area 220 is greater than or equal to the area of ​​the air outlet 110, which helps guide the airflow from the air outlet 110 and fully utilizes the first windbreak area 220 and the airflow guide grooves provided on it, resulting in a better air delivery effect.

[0060] In some embodiments of this utility model, such as Figure 3 As shown, the airflow guide groove 210 is a spiral groove, and there are multiple airflow guide grooves 210, which are evenly distributed along the circumferential direction of the air outlet 110.

[0061] In some embodiments of this utility model, such as Figure 5As shown, the air supply unit 100 also has an air inlet 120, which is connected to the outside to introduce fresh air. The air supply unit 100 also has a fan 130 that directs airflow from the air inlet 120 to the air outlet 110. The fan 130 is an axial flow fan, and the rotation direction of the fan 130 is consistent with the rotation direction of the airflow guide slot 210.

[0062] When the rotation direction of the fan 130 is consistent with the airflow guide direction of the airflow guide 210 (i.e., the rotation direction of the fan 130 is consistent with the spiral groove direction), the airflow through the fan 130 can enter the airflow guide 210 more smoothly, reducing airflow turbulence, lowering wind resistance, and reducing impact loss after the airflow contacts the baffle 200 (impact loss is the kinetic energy loss caused by the collision of airflow with a solid surface). This achieves the beneficial effect of increasing the airflow volume at the same rotation speed, and also allows the airflow to diffuse evenly in all directions, reducing wind resistance, increasing airflow, and lowering noise, thereby improving the user experience.

[0063] In some embodiments of this utility model, such as Figure 6 and Figure 7 As shown, the air supply device also includes a housing 300, multiple oscillating blades 400, and a connecting rod 500. An air outlet 110 and an air inlet 120 are disposed on the housing 300. Multiple oscillating blades 400 are disposed at the air outlet 110. Each oscillating blade 400 is rotatably mounted on the housing 300 via a first rotating shaft 410. Each oscillating blade 400 also has a second rotating shaft 420, which is parallel to the first rotating shaft 410. The housing 300 has an arc-shaped groove 310 for guiding the movement of the second rotating shaft 420. The arc-shaped groove 310 is coaxial with the first rotating shaft 410, and the second rotating shaft 420 is inserted into the arc-shaped groove 310. The connecting rod 500 is connected to multiple oscillating blades 400. The connecting rod 500 is movably mounted on the housing 300 along the arrangement direction of the multiple oscillating blades 400. The connecting rod 500 is provided with a slide groove 510 extending along the axial direction of the air outlet 110. The second rotating shaft 420 is inserted into the slide groove 510.

[0064] Multiple oscillating blades 400 are rotatably mounted on the housing 300 via a first rotating shaft 410, thus allowing for adjustment of the opening and closing angles of the oscillating blades 400. Furthermore, the flexible oscillating blades 400 can suppress vibration and noise caused by high-speed airflow. Movement of the connecting rod 500 can drive the multiple oscillating blades 400 to rotate synchronously.

[0065] In some embodiments of this utility model, such as Figure 6 and Figure 7 As shown, the air supply device also includes a drive unit 600. The drive unit 600 is located at one end of the connecting rod 500 and is configured to drive the connecting rod 500 to move linearly, so that the multiple oscillating blades 400 open the air outlet 110. If the first and second rotating shafts are horizontally arranged, the connecting rod moves up and down.

[0066] The drive device 600 is a stepper motor. When the drive device 600 operates, it drives the connecting rod 500 to move linearly. Under the action of the connecting rod 500, the second rotating shaft 420 moves along the arc-shaped groove 310, and at the same time, the second rotating shaft 420 moves up and down within the sliding groove 510. Since the second rotating shaft 420 is fixedly mounted on the oscillating blade 400, its movement along the arc-shaped groove 310 will drive the oscillating blade 400 to rotate around the first rotating shaft 410. Therefore, the operation of the drive device 600 can adjust the opening and closing of multiple oscillating blades 400 at the air outlet 110 or set the oscillating blades 400 at a certain angle. By adjusting the opening and closing degree of the oscillating blades 400, the air inlet cross-sectional area can be directly controlled.

[0067] In some embodiments of this utility model, the air supply device further includes a reset spring, disposed at the other end of the connecting rod 500, configured to move the connecting rod 500 so that multiple oscillating blades 400 close the air outlet 110. The reset spring allows the oscillating blades 400 to be adjusted to close the air outlet 110 in the event of a power outage or when the drive device 600 fails to operate. This serves to isolate external air and prevent airflow from entering the room.

[0068] Figure 8 This is a schematic diagram of a simulation result of an air supply device according to an embodiment of the present invention. Figure 9 This is a schematic diagram of the simulation results of an existing air supply device. For example... Figure 8 and Figure 9 As shown in the figure, through simulation analysis of the air supply device, the changes in air direction and air volume after the airflow reaches two different baffles are compared. The results are shown in the table below.

[0069] Existing air supply devices The air supply device of this utility model Torque 5.089E-3Nm 5.089E-3Nm air volume 1.358E-2kg / s 1.583E-2kg / s noise 1.160E-8W 1.157E-8W

[0070] The results show that the wind direction reaching baffle 200 changes significantly and more regularly compared to the wind direction reaching the baffle of an existing air supply device. The air volume reaching baffle 200 is greater than that reaching the baffle of an existing air supply device, while the noise is lower; for example, the air volume is 0.225E-2 kg / s greater, and the noise is 0.443E-8 W lower. Therefore, the baffle 200 design enables the air supply device of this embodiment to achieve better working performance.

[0071] Therefore, those skilled in the art should recognize that although many exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications conforming to the principles of the present invention can be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all such other variations or modifications.

Claims

1. An air supply device, characterized in that, include: The air supply unit has an air outlet; A baffle is disposed on the front side of the air outlet, and the baffle is spaced apart from the air supply section so that the airflow from the air outlet flows out through the gap between the baffle and the air supply section; and An airflow guide groove is provided on the surface of the baffle facing the air outlet. The inner end of the airflow guide groove is located at or near the center of the baffle directly opposite the air outlet. The airflow guide groove bends and extends from its inner end to its outer end.

2. The air supply device according to claim 1, characterized in that, The baffle includes: A first windbreak area is located in front of the air outlet, and the airflow guide groove is located on the surface of the first windbreak area facing the air outlet.

3. The air supply device according to claim 2, characterized in that, The baffle includes: The second windbreak area is connected to the edge of the first windbreak area and is located outside the first windbreak area; the surface of the second windbreak area facing the air outlet is located in front of the outlet of the airflow guide channel.

4. The air supply device according to claim 3, characterized in that, The edge of the baffle is provided with a flange that bends toward the air supply section; the rear edge of the flange is on the same plane as the outer edge of the surface of the first windproof area facing the air outlet.

5. The air supply device according to claim 2, characterized in that, The surface of the first windbreak area facing the air outlet includes: The central area, the center of which is directly opposite the center of the air outlet; An air guiding area is connected to the central area and located outside the central area; an airflow guide channel is disposed on the air guiding area, with the inner end of the airflow guide channel located at the connection between the central area and the air guiding area; and the outer end of the airflow guide channel located at the outer edge of the air guiding area.

6. The air supply device according to claim 5, characterized in that, The air guiding area is concave to form an annular groove with the opening facing backward.

7. The air supply device according to claim 5, characterized in that, The edge of the air guide region connecting to the central region is located behind the outer edge of the air guide region, or the edge of the air guide region connecting to the central region is flush with the outer edge of the air guide region; The central region may be planar or convex. The first windbreak area is circular, and the air outlet is square or circular. The edge of the first windbreak area is aligned with the edge of the air outlet, or is located outside the edge of the air outlet.

8. The air supply device according to claim 1, characterized in that, The airflow guide groove is a spiral groove; The airflow guide channels are multiple and are evenly distributed along the circumferential direction of the air outlet.

9. The air supply device according to claim 8, characterized in that, The air supply unit also has an air inlet, which is connected to the outside to introduce fresh air; The air supply unit also has a fan that promotes airflow from the air inlet to the air outlet, and the fan is an axial flow fan; the rotation direction of the fan is consistent with the rotation direction of the airflow guide groove.

10. The air supply device according to claim 1, characterized in that, The air supply unit also includes: The housing, wherein the air outlet is disposed on the housing; Multiple oscillating blades are disposed at the air outlet; each oscillating blade is rotatably mounted on the housing via a first rotating shaft, and each oscillating blade is also provided with a second rotating shaft, the second rotating shaft being arranged parallel to the first rotating shaft; the housing is provided with an arc-shaped groove for guiding the movement of the second rotating shaft, the arc-shaped groove being coaxial with the first rotating shaft; the second rotating shaft is inserted into the arc-shaped groove; A connecting rod is connected to the plurality of oscillating blades; the connecting rod is movably disposed on the housing along the arrangement direction of the plurality of oscillating blades; the connecting rod is provided with a sliding groove extending along the axial direction of the air outlet, and the second rotating shaft is inserted into the sliding groove.

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