Air conditioner indoor unit and its air deflector

Abstract

The utility model provides a kind of indoor unit of air conditioner and its air deflector, the air deflector includes: first plate body and second plate body, first plate body is provided with first air outlet hole;First plate body has oppositely arranged first edge and second edge, and oppositely arranged first face and second face;Second plate body is provided with second air outlet hole;First plate body has oppositely arranged third edge and fourth edge, and oppositely arranged third face and fourth face;Second plate body is arranged in the side of first plate body, first edge is adjacent third edge, second edge is adjacent fourth edge, and second face is towards third face;Second plate body is rotatably arranged relative to first plate body, to make the distance between third edge and first edge larger or smaller.The air deflector of the utility model can reduce the straight blowing feeling of air flow, make air flow form soft wind, and improve the use experience of user.

Description

Technical Field

[0001] This utility model relates to the technical field of air conditioners, and in particular to an indoor unit of an air conditioner and its air guide plate. Background Technology

[0002] In related technologies, air conditioner indoor units have air guide vanes at their air outlets. These vanes are driven by a motor to swing up and down to guide airflow. However, because the air guide vanes are single-plate structures, they can only provide simple directional guidance for the airflow from the indoor unit, and cannot effectively control the speed and uniformity of the airflow. This results in a strong, direct airflow from the indoor unit, negatively impacting the user experience. Utility Model Content

[0003] In view of the above problems, this utility model is proposed to provide an air conditioner indoor unit and its air guide plate that overcomes or at least partially solves the above problems.

[0004] One objective of this invention is to solve the problem of strong direct airflow from indoor units of air conditioners in related technologies.

[0005] Specifically, this utility model provides an air guide plate.

[0006] This utility model also provides an indoor unit for an air conditioner.

[0007] The air guide plate of this utility model includes: a first plate body, on which a first air outlet is provided; the first plate body has a first edge and a second edge disposed opposite to each other, and a first surface and a second surface disposed opposite to each other; a second plate body, on which a second air outlet is provided; the first plate body has a third edge and a fourth edge disposed opposite to each other, and a third surface and a fourth surface disposed opposite to each other; the second plate body is disposed on one side of the first plate body, the first edge is adjacent to the third edge, the second edge is adjacent to the fourth edge, and the second surface faces the third surface; the second plate body is rotatably disposed relative to the first plate body so that the distance between the third edge and the first edge increases or decreases.

[0008] In some embodiments, the air deflector is arranged such that it obstructs airflow from passing between the second edge and the fourth edge into the space between the second surface and the third surface.

[0009] In some embodiments, the air guide plate further includes:

[0010] A bracket, wherein the first plate and the second plate are disposed on the bracket; the bracket is provided with a rotating hole or a rotating shaft for rotating the bracket and the first plate and the second plate on the bracket, wherein the axis of the rotating hole or the rotating shaft is parallel to the rotation axis of the first plate and the second plate rotating relative to each other.

[0011] In some embodiments, the first plate is rotatably mounted on the bracket, and the second plate is rotatably mounted on the bracket; or, the first plate is rotatably mounted on the second plate, and the second plate is rotatably disposed on the bracket; or, the second plate is rotatably mounted on the first plate, and the first plate is rotatably disposed on the bracket.

[0012] The rotation axis of the first plate is parallel to the rotation axis of the second plate, and is also parallel to the axis of the rotating hole or the rotating shaft.

[0013] In some embodiments, the support includes:

[0014] A windbreak is provided on the side of the second edge and the fourth edge away from the first edge to prevent airflow from passing between the second edge and the fourth edge and entering between the second surface and the third surface.

[0015] In some embodiments, the windbreak includes:

[0016] The first sub-windproof portion extends along the length direction of the second edge; the first plate is mounted on the first sub-windproof portion;

[0017] The second sub-windshield extends along the length of the second edge; the second plate is mounted on the second sub-windshield; the first sub-windshield and the second sub-windshield are integrally formed or fixedly connected.

[0018] In some embodiments, the bracket includes a frame portion, the frame portion and the windbreak portion forming a support frame with mounting holes, the first plate and the second plate are disposed in the mounting holes of the support frame; the frame portion is connected to the second sub-windbreak portion;

[0019] The frame is provided with a mounting post, and the mounting post is provided with the rotating hole or rotating shaft;

[0020] The second plate can be rotated to a position where the fourth surface is on the same plane as the corresponding side surface of the support frame;

[0021] The second plate can be rotated to a position where the third surface and the second surface are in contact.

[0022] In some embodiments, the second plate can be rotated to a position where the third surface and the second surface are in contact; when the second plate can be rotated to a position where the third surface and the second surface are in contact, the first air outlet is aligned with or offset from the second air outlet.

[0023] In some embodiments, the first plate is rotatably disposed about the second edge; the second plate is rotatably disposed about the fourth edge.

[0024] The indoor unit of this air conditioner includes: a housing with an air outlet; an air guide plate as described in any of the preceding claims, the air guide plate being disposed at the air outlet; and the first plate and the second plate being arranged such that they are rotatably disposed relative to the housing about the same axis of rotation.

[0025] The air guide plate of this embodiment includes a first plate and a second plate. The second plate is rotatably disposed relative to the first plate, so that the included angle and spacing between the first and second plates are adjustable. This allows the first and second plates to guide the airflow from different directions as it passes through the air guide plate, preventing the airflow from concentrating in a single direction and reducing the direct draft. Furthermore, the first and second plates are respectively provided with a first air outlet and a second air outlet. As the airflow passes through and through these outlets, the airflow velocity is slowed, creating a gentle breeze that further reduces the direct draft and improves the user experience.

[0026] 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

[0027] 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:

[0028] Figure 1 This is a schematic structural diagram of the air guide plate according to an embodiment of the present utility model;

[0029] Figure 2 This is a schematic structural diagram of the air guide plate according to an embodiment of the present utility model;

[0030] Figure 3 It is based on Figure 1 A magnified schematic diagram of the structure at point A in the middle;

[0031] Figure 4 This is a schematic cross-sectional structural diagram of the air guide plate according to an embodiment of the present utility model;

[0032] Figure 5 This is a schematic structural diagram of the first plate body according to an embodiment of the present utility model;

[0033] Figure 6 This is a schematic structural diagram of the second plate body according to an embodiment of the present utility model;

[0034] Figure 7 This is a schematic structural diagram of the air guide plate according to an embodiment of the present utility model;

[0035] Figure 8 This is a schematic structural diagram of the air guide plate according to an embodiment of the present utility model;

[0036] Figure 9 This is a schematic structural diagram of the air guide plate according to an embodiment of the present utility model;

[0037] Figure 10 This is a schematic structural diagram of the indoor unit of an air conditioner according to an embodiment of the present utility model.

[0038] Figure label:

[0039] Air guide plate 10;

[0040] First plate 100; first air outlet 110; first edge 120; second edge 130; first surface 140; second surface 150;

[0041] Second plate 200; Second air outlet 210; Third edge 220; Fourth edge 230; Third surface 240; Fourth surface 250;

[0042] Bracket 300; Windproof section 310; First sub-windproof section 311; Second sub-windproof section 312; Frame section 320; Mounting hole 330; Mounting post 340;

[0043] First motor 410; Second motor 420;

[0044] Air conditioner indoor unit 20; air outlet 21. Detailed Implementation

[0045] The following reference Figures 1 to 10This description pertains to an indoor unit of an air conditioner and its air guide plate, according to embodiments 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, "multiple" 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] The air guide plate 10 of an embodiment of the present invention will now be described with reference to the accompanying drawings.

[0050] like Figures 1-9 As shown, the air guide plate 10 of this utility model embodiment includes a first plate body 100 and a second plate body 200.

[0051] The first plate 100 is provided with a first air outlet 110. The first plate 100 has a first edge 120 and a second edge 130 that are disposed opposite to each other. The first plate 100 also has a first surface 140 and a second surface 150 that are disposed opposite to each other. The two ends of the first air outlet 110 are respectively connected to the first surface 140 and the second surface 150.

[0052] The second plate 200 is provided with a second air outlet 210. The first plate 100 has a third edge 220 and a fourth edge 230 disposed opposite to each other. The second plate 200 also has a third surface 240 and a fourth surface 250 disposed opposite to each other. The two ends of the second air outlet 210 are respectively connected to the third surface 240 and the fourth surface 250. The second plate 200 is disposed on one side of the first plate 100, with the first edge 120 adjacent to the third edge 220, the second edge 130 adjacent to the fourth edge 230, and the second surface 150 facing the third surface 240. The second plate 200 is rotatably disposed relative to the first plate 100 so that the distance between the third edge 220 and the first edge 120 can be increased or decreased.

[0053] When air is discharged from the air outlet 21 of the air conditioner, the angle and spacing between the first plate 100 and the second plate 200 can be adjusted by changing the distance between the third edge 220 and the first edge 120. This allows the airflow to flow through the first plate 100 and the second plate 200 respectively, guiding the airflow in different directions and preventing the air from being concentrated in one direction, thus reducing the direct blowing sensation. Furthermore, when the airflow flows through the first air outlet 110 and the second air outlet 210, and passes through them, the airflow velocity is slowed down, resulting in a gentle breeze.

[0054] Compared with related technologies, the air guide plate 10 of this utility model embodiment includes a first plate 100 and a second plate 200. The second plate 200 is rotatably disposed relative to the first plate 100, so that the included angle and spacing between the first plate 100 and the second plate 200 are adjustable. This allows the first plate 100 and the second plate 200 to guide the airflow from different directions when it flows through the air guide plate 10, avoiding concentrated airflow in a single direction and reducing the direct blowing sensation. Furthermore, the first plate 100 and the second plate 200 are respectively provided with a first air outlet 110 and a second air outlet 210. When the airflow passes through the first air outlet 110 and the second air outlet 210, and passes through them, the airflow velocity is slowed down, resulting in a gentler breeze, further reducing the direct blowing sensation and improving the user experience.

[0055] In some embodiments, such as Figure 1 As shown, the cross-sectional profile of the first air outlet 110 is triangular, rectangular, or pentagonal; the cross-sectional profile of the second air outlet 210 is also triangular, rectangular, or pentagonal. This further enhances the smoothing effect of the airflow passing through the first and second plates.

[0056] In some embodiments, such as Figures 1-9 As shown, the first plate 100 is rotatably disposed about the second edge 130, and the second plate 200 is rotatably disposed about the fourth edge 230. That is, the first plate 100 and the second plate 200 rotate about their roots, thereby reducing the driving torque of the drive device (e.g., a motor) used to drive the rotation of the first plate 100 and the second plate 200, which is beneficial to achieving more precise control over the rotation of the first plate 100 and the second plate 200.

[0057] like Figure 1 and Figure 2As shown, the air guide plate 10 of this embodiment of the present invention also includes a support 300, on which a first plate 100 and a second plate 200 are disposed. The support 300 is provided with a rotating hole or a rotating shaft for rotation of the support 300 and the first plate 100 and the second plate 200 on the support 300. The axis of the rotating hole or rotating shaft is parallel to the axis of rotation of the first plate 100 and the second plate 200 relative to each other. That is, both the first plate 100 and the second plate 200 are connected to the support 300 through rotating holes or rotating shafts to enable the first plate 100 and the second plate 200 to rotate relative to each other. For example, the first plate 100 is provided with a rotating hole, and the support 300 is provided with a rotating shaft that mates with the rotating hole, the rotating shaft being rotatably connected to the rotating hole. This not only allows the first plate 100 and the second plate 200 to be rotatably mounted on the bracket 300, making the distance between the third edge 220 and the first edge 120 of the first plate 100 and the second plate 200 variable, but also enables the bracket 300, the first plate 100 and the second plate 200 to guide the air out at three different angles, avoiding the airflow from being concentrated in one direction, thereby further reducing the feeling of direct airflow.

[0058] In some embodiments, such as Figure 7 As shown, the first plate 100 is rotatably mounted on the bracket 300, and the second plate 200 is rotatably mounted on the bracket 300. The rotation axis of the first plate 100 is parallel to the rotation axis of the second plate 200, and also parallel to the axis of the rotating hole or shaft. That is, both the first plate 100 and the second plate 200 can be rotatably connected to the bracket 300, so that both the first plate 100 and the second plate 200 are supported by the bracket 300, making the structure of the air guide plate 10 in this embodiment more stable.

[0059] In other embodiments, such as Figure 8 As shown, the first plate 100 is rotatably mounted on the second plate 200, and the second plate 200 is rotatably mounted on the bracket 300. The rotation axis of the first plate 100 is parallel to the rotation axis of the second plate 200, and also parallel to the axis of the rotating hole or shaft. This eliminates the need for mounting space for the first plate 100 on the bracket 300, reducing structural redundancy in the bracket 300, thereby reducing the overall size of the air guide plate 10 in this embodiment and lowering manufacturing costs.

[0060] In some embodiments, the second plate 200 is rotatably mounted on the first plate 100, and the first plate 100 is rotatably mounted on the bracket 300. The rotation axis of the first plate 100 is parallel to the rotation axis of the second plate 200, and also parallel to the axis of the rotating hole or shaft. This eliminates the need for mounting space for the second plate 200 on the bracket 300, reducing structural redundancy in the bracket 300, thereby reducing the overall size of the air guide plate 10 in this embodiment and lowering manufacturing costs.

[0061] In some embodiments, the air guide plate 10 is arranged to obstruct airflow from passing between the second edge 130 and the fourth edge 230 into the area between the second surface 150 and the third surface 240. This prevents the exhaust airflow from directly passing between the second edge 130 and the fourth edge 230 into the area between the second surface 150 and the third surface 240, so that the airflow needs to pass through the first air outlet 110 before flowing into the area between the second surface 150 and the third surface 240, thereby further improving the gentle breeze effect of the exhaust airflow.

[0062] In some embodiments, such as Figures 7-9 As shown, the bracket 300 includes a windbreak 310, which is disposed on the side of the second edge 130 and the fourth edge 230 away from the first edge 120 to prevent airflow from passing between the second edge 130 and the fourth edge 230 and entering between the second surface 150 and the third surface 240. By directly blocking the airflow from passing between the second edge 130 and the fourth edge 230 and entering between the second surface 150 and the third surface 240, the airflow is forced to pass through the first air outlet 110 before flowing into the area between the second surface 150 and the third surface 240, thereby further improving the gentle breeze effect of the airflow.

[0063] Specifically, such as Figures 7-9 As shown, the windbreak portion 310 includes a first sub-windbreak portion 311 and a second sub-windbreak portion 312. The first sub-windbreak portion 311 extends along the length direction of the second edge 130, and a first plate 100 is mounted on the first sub-windbreak portion 311. The second sub-windbreak portion 312 extends along the length direction of the second edge 130, and a second plate 200 is mounted on the second sub-windbreak portion 312. The first sub-windbreak portion 311 and the second sub-windbreak portion 312 are integrally formed or fixedly connected.

[0064] In some embodiments, such as Figure 4As shown, the bracket 300 includes a frame portion 320, which and a windproof portion 310 form a support frame with mounting holes 330. A first plate 100 and a second plate 200 are disposed within the mounting holes 330 of the support frame. The frame portion 320 is connected to a second sub-windproof portion 312, and a first sub-windproof portion 311 protrudes from the frame portion 320. The first plate 100 is rotatably connected to the first sub-windproof portion 311. A mounting post 340 is provided on the frame portion 320, and the mounting post 340 has a rotating hole or a rotating shaft. Thus, by disposing the first plate 100 and the second plate 200 within the mounting holes 330 of the support frame, interference from the bracket 300 with the rotation of the first plate 100 and the second plate 200 is avoided. The second plate 200 can be rotated to a position where the fourth surface 250 is on the same plane as the corresponding side surface of the support frame. The second plate 200 can also be rotated to a position where the third surface 240 and the second surface 150 are in contact, so that the first plate 100, the second plate 200 and the support frame can form a plate-like structure to completely seal the air outlet 21.

[0065] In other embodiments, such as Figure 8 and Figure 9 As shown, the first plate 100 and the second plate 200 are both connected to the wall of the mounting hole 330, so that the part of the support frame connected to the first plate 100 and the second plate 200 naturally forms the windbreak part 310, thereby making the structure of the air guide plate 10 in this embodiment simpler and reducing the manufacturing cost.

[0066] Specifically, the second plate 200 can be rotated to a position where the third surface 240 and the second surface 150 are in contact, and when the second plate 200 can be rotated to a position where the third surface 240 and the second surface 150 are in contact, the first air outlet 110 and the second air outlet 210 are aligned or misaligned.

[0067] The following describes an embodiment of the air conditioner indoor unit 20.

[0068] The indoor unit 20 of this embodiment of the air conditioner includes a housing and an air guide plate 10. An air outlet 21 is provided on the housing, and the air guide plate 10 is the air guide plate 10 of any of the above embodiments, disposed at the air outlet 21. A first plate 100 and a second plate 200 are arranged such that they are rotatably disposed relative to the housing about the same axis of rotation. This allows the first plate 100 and the second plate 200 to rotate relative to the housing simultaneously about the same axis of rotation, and the first plate 100 and the second plate 200 can also rotate about the second edge 130 and the fourth edge 230 respectively, further expanding the air guiding angle. Specifically, the first plate 100 and the second plate 200 are rotatably disposed on a bracket 300, and the bracket 300 is rotatably connected to the air outlet 21.

[0069] The indoor unit 20 of the air conditioner in this embodiment of the present invention includes an air guide plate 10 comprising a first plate 100 and a second plate 200. The second plate 200 is rotatably disposed relative to the first plate 100, so that the angle and spacing between the first plate 100 and the second plate 200 are adjustable. This allows the first plate 100 and the second plate 200 to guide the airflow from different directions when it passes through the air guide plate 10, preventing the airflow from concentrating in only one direction and reducing the direct blowing sensation. Furthermore, the first plate 100 and the second plate 200 are respectively provided with a first air outlet 110 and a second air outlet 210. When the airflow passes through the first air outlet 110 and the second air outlet 210, and passes through them, the airflow velocity is slowed down, resulting in a gentler breeze, further reducing the direct blowing sensation and improving the user experience.

[0070] In some embodiments, the indoor unit 20 of the air conditioner of this utility model further includes a first motor 410 and a second motor 420. The first motor 410 is used to drive the first plate 100 to rotate, and the second motor 420 is used to start the second plate 200 to rotate.

[0071] In some alternative embodiments, where the first plate 100 is rotatably mounted on the bracket 300 and the second plate 200 is rotatably mounted on the bracket 300, both the first motor 410 and the second motor 420 are mounted on the bracket 300.

[0072] In some alternative embodiments, where the first plate 100 is rotatably mounted on the second plate 200 and the second plate 200 is rotatably disposed on the bracket 300, the first motor 410 is mounted on the second plate 200 and the second motor 420 is disposed on the bracket 300.

[0073] In some alternative embodiments, where the second plate 200 is rotatably mounted on the first plate 100 and the first plate 100 is rotatably disposed on the bracket 300, the first motor 410 is mounted on the bracket 300. The second motor 420 is disposed on the first plate 100.

[0074] 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 guide plate, characterized in that, include: The first plate has a first air outlet; the first plate has a first edge and a second edge disposed opposite to each other, and a first surface and a second surface disposed opposite to each other. The second plate has a second air outlet; the first plate has a third edge and a fourth edge that are disposed opposite to each other, as well as a third surface and a fourth surface that are disposed opposite to each other. The second plate is disposed on one side of the first plate, the first edge is adjacent to the third edge, the second edge is adjacent to the fourth edge, and the second surface faces the third surface; The second plate is rotatably disposed relative to the first plate so that the distance between the third edge and the first edge increases or decreases.

2. The air guide plate according to claim 1, characterized in that, The air guide plate is arranged to obstruct airflow from passing between the second edge and the fourth edge into the space between the second surface and the third surface.

3. The air guide plate according to claim 1, characterized in that, Also includes: A bracket, wherein the first plate and the second plate are disposed on the bracket; the bracket is provided with a rotating hole or a rotating shaft for rotating the bracket and the first plate and the second plate on the bracket, wherein the axis of the rotating hole or the rotating shaft is parallel to the rotation axis of the first plate and the second plate rotating relative to each other.

4. The air guide plate according to claim 3, characterized in that, The first plate is rotatably mounted on the bracket, and the second plate is rotatably mounted on the bracket; or, the first plate is rotatably mounted on the second plate, and the second plate is rotatably disposed on the bracket; or, the second plate is rotatably mounted on the first plate, and the first plate is rotatably disposed on the bracket. The rotation axis of the first plate is parallel to the rotation axis of the second plate, and is also parallel to the axis of the rotating hole or the rotating shaft.

5. The air guide plate according to claim 4, characterized in that, The support includes: A windbreak is provided on the side of the second edge and the fourth edge away from the first edge to prevent airflow from passing between the second edge and the fourth edge and entering between the second surface and the third surface.

6. The air guide plate according to claim 5, characterized in that, The windbreak includes: The first sub-windproof portion extends along the length direction of the second edge; the first plate is mounted on the first sub-windproof portion; The second sub-windshield extends along the length of the second edge; the second plate is mounted on the second sub-windshield; the first sub-windshield and the second sub-windshield are integrally formed or fixedly connected.

7. The air guide plate according to claim 6, characterized in that, The bracket includes a frame portion, the frame portion and the windproof portion forming a support frame with mounting holes, the first plate and the second plate are disposed in the mounting holes of the support frame; the frame portion is connected to the second sub-windproof portion; The frame is provided with a mounting post, and the mounting post is provided with the rotating hole or rotating shaft; The second plate can be rotated to a position where the fourth surface is on the same plane as the corresponding side surface of the support frame; The second plate can be rotated to a position where the third surface and the second surface are in contact.

8. The air guide plate according to claim 1, characterized in that, The second plate can be rotated to a position where the third surface and the second surface are in contact; when the second plate can be rotated to a position where the third surface and the second surface are in contact, the first air outlet is aligned with or offset from the second air outlet.

9. The air guide plate according to claim 1, characterized in that, The first plate is rotatably disposed about the second edge; the second plate is rotatably disposed about the fourth edge.

10. An indoor unit of an air conditioner, characterized in that, include: A housing, on which an air outlet is provided; The air guide plate according to any one of claims 1 to 9, wherein the air guide plate is disposed at the air outlet; The first plate and the second plate are arranged such that they are rotatably disposed relative to the housing about the same axis of rotation.

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