Air conditioner indoor unit

Abstract

The present invention provides an air conditioner indoor unit, comprising: an air conditioner indoor unit body, the air conditioner indoor unit body having an air outlet panel, and an air outlet being provided on the air outlet panel; a wind guiding mechanism, the wind guiding mechanism including a wind guiding body and a wind guiding plate, the wind guiding plate being provided on the wind guiding body; the wind guiding mechanism being provided at the top of the air conditioner indoor unit body and being movably provided relative to the air conditioner indoor unit body, the wind guiding mechanism having an initial position where the wind guiding plate is hidden inside the air conditioner indoor unit body and a wind guiding position where the wind guiding plate is located above the air conditioner indoor unit body. The air conditioner indoor unit of the present invention solves the problem of poor wind guiding effect of the air conditioner indoor unit in the prior art.

Description

Technical Field

[0001] The present invention relates to the field of air conditioning equipment, and more particularly, to an indoor unit of an air conditioner. Background Art

[0002] Air conditioners are one of the essential household appliances. The indoor unit of a floor-standing air conditioner is a common form of indoor unit, and it is widely used because of its large power and fast cooling and heating characteristics.

[0003] However, the existing indoor units of floor-standing air conditioners have the following problems:

[0004] The air-sweeping area of the air guiding mechanism is small, resulting in an unsatisfactory air guiding effect;

[0005] Forcing the air to change direction during the air guiding process results in unnecessary noise;

[0006] During the refrigeration process, condensed water is generated due to the intersection of cold air and hot air and adheres to the air guiding plate, thus dripping onto the user's floor, resulting in a poor user experience. Summary of the Invention

[0007] The main object of the present invention is to provide an indoor unit of an air conditioner to solve the problem of poor air guiding effect of the existing indoor unit of an air conditioner.

[0008] To achieve the above object, the present invention provides an indoor unit of an air conditioner, including: an indoor unit body of the air conditioner, the indoor unit body of the air conditioner having an air outlet panel, and an air outlet being provided on the air outlet panel; an air guiding mechanism, the air guiding mechanism including an air guiding body and an air guiding plate, the air guiding plate being provided on the air guiding body; the air guiding mechanism being provided on the top of the indoor unit body of the air conditioner and being movably provided relative to the indoor unit body of the air conditioner, the air guiding mechanism having an initial position where the air guiding plate is hidden in the indoor unit body of the air conditioner and an air guiding position where the air guiding plate is located above the indoor unit body of the air conditioner.

[0009] Further, the top end of the indoor unit body of the air conditioner has a first end face, and the top of the air guiding body has a second end face; when the air guiding mechanism is in the initial position, the air guiding mechanism is located in the indoor unit body of the air conditioner, and the second end face is flush with the first end face.

[0010] Further, the indoor unit of the air conditioner further includes a transmission assembly, the transmission assembly being provided on the indoor unit body of the air conditioner, the transmission assembly being in transmission connection with the air guiding body to move the air guiding mechanism along a first preset direction.

[0011] Further, the transmission assembly includes a transmission gear and a transmission rack, the transmission gear being connected to the indoor unit body of the air conditioner, the transmission rack being provided on the air guiding body; the transmission gear is engaged with the transmission rack, and the transmission gear is rotatably provided so that the transmission gear and the transmission rack drive the air guiding mechanism to move.

[0012] Furthermore, the indoor air conditioner also includes a guiding groove and a guiding portion, the guiding portion is adapted to the guiding groove, the guiding portion is disposed in the guiding groove and is movably disposed along the guiding groove; wherein, the guiding groove is disposed on the indoor air conditioner body, and the guiding portion is disposed on the air guiding body; or, the guiding groove is disposed on the air guiding body, and the guiding portion is disposed on the indoor air conditioner body.

[0013] Furthermore, the top of the air guiding body has a second end face, the air guiding body also has a first side wall, the first side wall is connected to the second end face, and an air guiding opening is formed on the first side wall, and the air guiding plate is disposed at the air guiding opening.

[0014] Furthermore, the indoor air conditioner body has an air duct; the air guiding body has an air guiding duct, and the air guiding duct is communicated with both the air duct and the air guiding opening; wherein, the air guiding duct has an air duct communication port, an air duct top wall, a first air duct side wall and a second air duct side wall, the air guiding duct is connected to the air duct through the air duct communication port, and the air duct top wall is oppositely disposed to the air duct communication port; the first side wall is the first air duct side wall, the first side wall and the second air duct side wall are oppositely disposed, and the connection portion between the second air duct side wall and the air duct top wall is arc-shaped.

[0015] Furthermore, a water receiving trough is disposed at the top end of the indoor air conditioner body, and the water receiving trough is used for receiving the condensed water generated at the air guiding plate; the indoor air conditioner also includes a water guiding pipe, one end of the water guiding pipe is connected to the water receiving trough, and the other end of the water guiding pipe is connected to the water receiving tray of the indoor air conditioner.

[0016] Furthermore, the top end of the indoor air conditioner body has a first end face, and the first end face is inclined with respect to the horizontal direction.

[0017] Furthermore, the first end face has a first end portion and a second end portion which are oppositely disposed, the first end portion is higher than the second end portion; the first side wall is inclined with respect to the first end face, and the first side wall is located at one end of the air guiding body close to the second end portion of the first end face; the first side wall has a first end and a second end which are oppositely disposed, the first end is located on the side of the second end away from the indoor air conditioner body, and the first end is located on the side of the second end close to the second end portion of the first end face.

[0018] The indoor air conditioner of the present invention includes an indoor air conditioner body and an air guiding mechanism, the air guiding mechanism is disposed on the top of the indoor air conditioner body and is movably disposed relative to the indoor air conditioner body; during the operation of the indoor air conditioner, the air guiding mechanism moves from the initial position to the air guiding position, at this time, the air guiding plate is located above the indoor air conditioner body, and the air guiding is performed through the air guiding plate at a high position, so that the air guiding range is increased; when the indoor air conditioner stops operating, the air guiding mechanism moves from the air guiding position to the initial position, at this time, the air guiding plate is hidden in the indoor air conditioner body to prevent dust from entering the indoor air conditioner body. The indoor air conditioner realizes a large swept area and improves the air guiding effect by providing a liftable air guiding mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0020] Figure 1 shows a schematic structural view of the air guiding mechanism of an air conditioner indoor unit according to the present invention when in the air guiding position;

[0021] Figure 2 shows a schematic structural view of the air guiding mechanism of an air conditioner indoor unit according to the present invention when in the initial position;

[0022] Figure 3 shows a schematic structural view of the air guiding mechanism of an air conditioner indoor unit according to the present invention;

[0023] Figure 4 shows an exploded view of the air guiding mechanism of an air conditioner indoor unit according to the present invention;

[0024] Figure 5 shows a bottom view of the air guiding mechanism of an air conditioner indoor unit according to the present invention;

[0025] Figure 6 shows a partial enlarged view of the top end of an air conditioner indoor unit according to the present invention.

[0026] Among them, the above-mentioned drawings include the following reference numerals:

[0027] 10, air conditioner indoor unit body; 11, first end face; 12, air outlet; 20, air guiding mechanism; 21, air guiding body; 211, second end face; 212, first side wall; 213, air guiding port; 22, air guiding plate; 23, air guiding air duct; 231, air duct communication port; 232, air duct top wall; 234, second air duct side wall; 30, driving rack; 40, guiding part; 50, water receiving tank. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0029] It should be pointed out that the following detailed descriptions are all illustrative and are intended to provide further explanations for this application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those of ordinary skill in the technical field to which this application belongs.

[0030] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0031] The present invention provides an air conditioner indoor unit. Please refer to Figures 1 to 6 , including: an air conditioner indoor unit body 10, the air conditioner indoor unit body 10 has an air outlet panel, and an air outlet 12 is provided on the air outlet panel; a wind guiding mechanism 20, the wind guiding mechanism 20 includes a wind guiding body 21 and a wind guiding plate 22, and the wind guiding plate 22 is arranged on the wind guiding body 21; the wind guiding mechanism 20 is arranged on the top of the air conditioner indoor unit body 10 and is movably arranged relative to the air conditioner indoor unit body 10, and the wind guiding mechanism 20 has an initial position where the wind guiding plate 22 is hidden in the air conditioner indoor unit body 10 and a wind guiding position where the wind guiding plate 22 is located above the air conditioner indoor unit body 10.

[0032] The air conditioner indoor unit of the present invention includes an air conditioner indoor unit body 10 and a wind guiding mechanism 20. The wind guiding mechanism 20 is arranged on the top of the air conditioner indoor unit body 10 and is movably arranged relative to the air conditioner indoor unit body 10; during the operation of the air conditioner indoor unit, the wind guiding mechanism 20 moves from the initial position to the wind guiding position. At this time, the wind guiding plate 22 is located above the air conditioner indoor unit body 10, and the wind is swept through the wind guiding plate 22 at a high position, increasing the wind sweeping range; when the air conditioner indoor unit stops running, the wind guiding mechanism 20 moves from the wind guiding position to the initial position. At this time, the wind guiding plate 22 is hidden in the air conditioner indoor unit body 10 to prevent dust from entering the air conditioner indoor unit body 10. The air conditioner indoor unit realizes a large swept area and improves the wind guiding effect by setting a liftable wind guiding mechanism 20.

[0033] During specific implementation, the wind guiding plate 22 is driven by a motor to realize the movement of the wind guiding plate 22 for wind sweeping.

[0034] During specific implementation, the wind guiding mechanism 20 in the wind guiding position is higher than the wind guiding mechanism 20 in the initial position, and the wind guiding mechanism 20 rises from the initial position to the wind guiding position when the air conditioner indoor unit is running.

[0035] Preferably, the shape of the wind guiding mechanism 20 is a cube; along the direction perpendicular to the movement direction of the wind guiding mechanism 20, the cross-section of the wind guiding mechanism 20 is rectangular. Such a setting facilitates the installation and disassembly of the wind guiding mechanism 20 and also facilitates the installation of other components, such as transmission components.

[0036] In this embodiment, the top end of the air conditioner indoor unit body 10 has a first end face 11, and the top of the air guide body 21 has a second end face 211; when the air guide mechanism 20 is in the initial position, the air guide mechanism 20 is located inside the air conditioner indoor unit body 10, and the second end face 211 is flush with the first end face 11. Such a setting makes the air guide mechanism 20 in a closed state, and the appearance of the air guide mechanism 20 fits well with the surroundings, making the whole air conditioner indoor unit look more beautiful.

[0037] In order to realize the lifting of the air guide mechanism, the air conditioner indoor unit further includes a transmission assembly. The transmission assembly is arranged on the air conditioner indoor unit body 10, and the transmission assembly is in transmission connection with the air guide body 21 so that the air guide mechanism 20 moves along a first preset direction. Wherein, the first preset direction is inclined with respect to both the vertical direction and the horizontal direction.

[0038] Specifically, the transmission assembly includes a transmission gear and a transmission rack 30. The transmission gear is connected to the air conditioner indoor unit body 10, and the transmission rack 30 is arranged on the air guide body 21; the transmission gear is meshed with the transmission rack 30, and the transmission gear is rotatably arranged so that the transmission gear and the transmission rack 30 drive the air guide mechanism 20 to move.

[0039] Specifically, the transmission rack 30 is driven to rotate by a motor. The transmission rack 30 is fixed to the air guide body 21 by screws.

[0040] Preferably, there are two transmission assemblies, and the transmission racks 30 of the two transmission assemblies are arranged on opposite sides of the air guide body 21. Such a setting makes the transmission more reliable.

[0041] In this embodiment, the air conditioner indoor unit further includes a guide groove and a guide portion 40. The guide portion 40 is adapted to the guide groove, and the guide portion 40 is arranged in the guide groove and is movably arranged along the guide groove; wherein, the guide groove is arranged on the air conditioner indoor unit body 10, and the guide portion 40 is arranged on the air guide body 21; or, the guide groove is arranged on the air guide body 21, and the guide portion 40 is arranged on the air conditioner indoor unit body 10.

[0042] Specifically, the guide portion 40 is a cylindrical structure; preferably, there are multiple guide portions 40, and the multiple guide portions 40 are arranged at intervals along the extension direction of the guide groove.

[0043] In this embodiment, the top of the air guide body 21 has a second end face 211, and the air guide body 21 further has a first side wall 212. The first side wall 212 is connected to the second end face 211, and an air guide opening 213 is formed on the first side wall 212. The air guide plate 22 is arranged at the air guide opening 213. Such a setting can well protect the air guide plate 22 when the air guide mechanism 20 is in the initial position and prevent dust from entering the air guide opening 213.

[0044] In this embodiment, the air conditioner indoor unit body 10 has an air duct; the air guiding body 21 has an air guiding duct 23, and the air guiding duct 23 is communicated with both the air duct and the air guiding opening 213; wherein, the air guiding duct 23 has an air duct communication opening 231, an air duct top wall 232, a first air duct side wall and a second air duct side wall 234. The air guiding duct 23 is connected to the air duct through the air duct communication opening 231, and the air duct top wall 232 is arranged opposite to the air duct communication opening 231; the first side wall 212 is the first air duct side wall, the first side wall 212 and the second air duct side wall 234 are arranged opposite to each other, and the connection part of the second air duct side wall 234 and the air duct top wall 232 is arc-shaped. That is, the connection part of the second air duct side wall 234 and the air duct top wall 232 is in a curved surface transition. Such a setting makes the air direction change more stable during the air guiding process, has a better turning effect, and will not generate unnecessary noise.

[0045] In this embodiment, a water receiving tank 50 is arranged at the top end of the air conditioner indoor unit body 10, and the water receiving tank 50 is used for receiving the condensed water generated at the air guiding plate 22; the air conditioner indoor unit further includes a water guiding pipe, one end of the water guiding pipe is connected to the water receiving tank 50, and the other end of the water guiding pipe is connected to the water receiving tray of the air conditioner indoor unit. Such a setting realizes the collection of the condensed water.

[0046] Preferably, the water receiving tank 50 is arranged at the lowest position at the top end of the air conditioner indoor unit body 10 to facilitate the reception of the condensed water.

[0047] Preferably, the top end of the air conditioner indoor unit body 10 has a first end face 11, and the first end face 11 is inclined relative to the horizontal direction. And, the first end face 11 is inclined relative to the vertical direction. Such a setting makes the condensed water generated at the air guiding plate 22 flow along the inclined first end face 11 into the water receiving tank 50, preventing the condensed water from dripping onto the user's floor.

[0048] Preferably, the first end face 11 has a first end portion and a second end portion arranged opposite to each other, and the first end portion is higher than the second end portion; the first side wall 212 is inclined relative to the first end face 11, and the first side wall 212 is located at one end of the air guiding body 21 close to the second end portion of the first end face 11; the first side wall 212 has a first end and a second end arranged opposite to each other, the first end is located on the side away from the air conditioner indoor unit body 10 of the second end, and the first end is located on the side close to the second end portion of the first end face 11 of the second end. Such a setting avoids the condensed water from flowing back into the air duct and ensures the collection of the condensed water.

[0049] The position of the air guiding mechanism of the existing air conditioner indoor unit cannot be changed, and the air sweeping area is small, resulting in an unsatisfactory air guiding effect. The air guiding mechanism of the present application is arranged to be liftable. When the air guiding mechanism is at a high position, the air sweeping area increases. In the existing air conditioner indoor unit, the air conditioner air directly passes through the air guiding plate after passing through the air duct. During the air guiding process, the air is forced to change direction by the air guiding plate, resulting in unnecessary noise. The air guiding mechanism of the present application sets the air duct profile of the air guiding air duct 23 as an arc profile, so that a air guiding curved surface is formed at the turning of the air guiding air duct 23 (that is, the connection between the second air duct side wall 234 and the air duct top wall 232 is arc-shaped), thus avoiding the noise generated by forced direction change. During the refrigeration process, condensate is generated due to the intersection of cold air and hot air and will adhere to the air guiding plate, thus dripping onto the user's floor, and the user experience is poor. The present application sets a water receiving groove at the lowest part of the top end of the air conditioner indoor unit body 10, so that the condensate is effectively recovered and will not drip onto the user's floor.

[0050] The air guiding mechanism 20 of the present application is arranged at the head of the air conditioner indoor unit body 10 to conduct air guiding, which can greatly increase the air sweeping area, and the air outlet profile at the connection between the second air duct side wall 234 and the air duct top wall 232 is arc-shaped, which can reduce unnecessary noise. In addition, the condensate formed by the air guiding plate will flow into the water receiving groove 50 along the first end face 11 of the head of the air conditioner indoor unit body 10 and will not drip onto the user's floor.

[0051] The present application solves the following problems: the air guiding effect is not ideal; unnecessary abnormal noises are generated during the air guiding process; condensate is formed during the air guiding process and drips onto the user's floor.

[0052] The air guiding mechanism of the present application achieves the following effects: the air guiding passes through specific arc treatment, the air changes direction better, the swept area is large, the air guiding part passes through specific arc treatment, the air changes direction more smoothly, no unnecessary noise is generated, the head of the air conditioner indoor unit body 10 is integrally inclined at a certain angle, and a water receiving groove is provided to collect condensate.

[0053] The air guiding mechanism of the air conditioner indoor unit of the present application is located at the head (i.e., the top) of the whole cabinet machine (i.e., the air conditioner indoor unit body 10), and the air guiding mechanism is inclined at a certain angle, such as Figure 1 shown. As Figure 1 shown, the air guiding mechanism is lifted to perform the air guiding effect. As Figure 3 shown, the lifting mechanism is provided with a gear-rack motion mechanism to realize the lifting function of the air guiding mechanism. In addition, a guiding part 40 is provided, and the guiding part 40 moves linearly in the guiding groove to play a guiding role. As Figure 5 , a curved surface transition is provided inside the air guiding air duct, so that the air can turn more smoothly and the air guiding effect is more ideal; and the air inside the air duct turns more gently, reducing unnecessary noise caused by rapid direction change.

[0054] During specific implementation, after the air conditioner indoor unit is turned off, the motor controls the air deflector to close, and the air guiding mechanism moves downward to the initial position.

[0055] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0056] The air conditioner indoor unit of the present invention includes an air conditioner indoor unit body 10 and an air guiding mechanism 20. The air guiding mechanism 20 is arranged at the top of the air conditioner indoor unit body 10 and is movably arranged relative to the air conditioner indoor unit body 10. During the operation of the air conditioner indoor unit, the air guiding mechanism 20 moves from the initial position to the air guiding position. At this time, the air deflector 22 is located above the air conditioner indoor unit body 10, and air is swept through the air deflector 22 at a high position, increasing the air sweeping range. When the air conditioner indoor unit stops operating, the air guiding mechanism 20 moves from the air guiding position to the initial position. At this time, the air deflector 22 is hidden inside the air conditioner indoor unit body 10 to prevent dust from entering the air conditioner indoor unit body 10. By setting the liftable air guiding mechanism 20, the air conditioner indoor unit achieves a large swept area and improves the air guiding effect.

[0057] It should be noted that the terms "first", "second", etc. in the specification, claims and above-mentioned drawings of this application are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described here can be implemented in an order other than those illustrated or described here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0058] For the sake of description, spatial relative terms such as "above...", "over...", "on the upper surface of...", "above" etc. can be used here to describe the spatial position relationship between a device or feature shown in the figure and other devices or features. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the figure. For example, if the device in the figure is inverted, the device described as "above other devices or structures" or "over other devices or structures" will be positioned as "below other devices or structures" or "under other devices or structures" afterwards. Thus, the exemplary term "above..." can include both the orientations of "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding explanations are made for the spatial relative descriptions used here.

[0059] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, various modifications and variations can be made to the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An air conditioner indoor unit, characterized in that, Comprising: An air conditioner indoor unit body (10), the air conditioner indoor unit body (10) having an air outlet panel, and an air outlet (12) being provided on the air outlet panel; An air guiding mechanism (20), the air guiding mechanism (20) including an air guiding body (21) and an air guiding plate (22), the air guiding plate (22) being provided on the air guiding body (21); the air guiding mechanism (20) is provided on the top of the air conditioner indoor unit body (10) and is movably provided relative to the air conditioner indoor unit body (10), and the air guiding mechanism (20) has an initial position where the air guiding plate (22) is hidden inside the air conditioner indoor unit body (10) and an air guiding position where the air guiding plate (22) is located above the air conditioner indoor unit body (10); The air conditioner indoor unit further includes a guiding groove and a guiding portion (40), the guiding portion (40) being adapted to the guiding groove, the guiding portion (40) being provided in the guiding groove and being movably provided along the guiding groove; the guiding groove is provided on the air conditioner indoor unit body (10), and the guiding portion (40) is provided on the air guiding body (21); or, the guiding groove is provided on the air guiding body (21), and the guiding portion (40) is provided on the air conditioner indoor unit body (10); The top of the air guiding body (21) has a second end face (211), the air guiding body (21) further has a first side wall (212), the first side wall (212) is connected to the second end face (211), an air guiding opening (213) is formed on the first side wall (212), and the air guiding plate (22) is provided at the air guiding opening (213); A water receiving trough (50) is provided at the top end of the air conditioner indoor unit body (10), the water receiving trough (50) being used for receiving condensed water generated at the air guiding plate (22); the air conditioner indoor unit further includes a water guiding pipe, one end of the water guiding pipe being connected to the water receiving trough (50), and the other end of the water guiding pipe being connected to the water receiving tray of the air conditioner indoor unit; The top end of the air conditioner indoor unit body (10) has a first end face (11), and the first end face (11) is inclined relative to the horizontal direction; The first end face (11) has a first end portion and a second end portion which are oppositely arranged, the first end portion being higher than the second end portion; the first side wall (212) is inclined relative to the first end face (11), and the first side wall (212) is located at one end of the air guiding body (21) close to the second end portion of the first end face (11); the first side wall (212) has a first end and a second end which are oppositely arranged, the first end being located on a side of the second end away from the air conditioner indoor unit body (10), and the first end being located on a side of the second end close to the second end portion of the first end face (11).

2. The air conditioner indoor unit according to claim 1, characterized in that, When the air guiding mechanism (20) is in the initial position, the air guiding mechanism (20) is located inside the air conditioner indoor unit body (10), and the second end face (211) is flush with the first end face (11).

3. The indoor air conditioner according to claim 1, wherein The indoor air conditioner further includes a transmission assembly, the transmission assembly is arranged on the indoor air conditioner body (10), and the transmission assembly is in transmission connection with the air guiding body (21) so that the air guiding mechanism (20) moves along a first preset direction.

4. The air conditioner indoor unit according to claim 3, wherein, The transmission assembly includes a transmission gear and a transmission rack (30), the transmission gear is connected to the indoor air conditioner body (10), and the transmission rack (30) is arranged on the air guiding body (21); the transmission gear is meshed with the transmission rack (30), and the transmission gear is rotatably arranged so that the transmission gear and the transmission rack (30) drive the air guiding mechanism (20) to move.

5. The air conditioner indoor unit according to any one of claims 1 to 4, characterized in that, The indoor air conditioner body (10) has an air duct; the air guiding body (21) has an air guiding duct (23), and the air guiding duct (23) is communicated with both the air duct and the air guiding opening (213); wherein, the air guiding duct (23) has an air duct communication port (231), an air duct top wall (232), a first air duct side wall and a second air duct side wall (234), the air guiding duct (23) is communicated with the air duct through the air duct communication port (231), and the air duct top wall (232) is oppositely arranged to the air duct communication port (231); the first side wall (212) is the first air duct side wall, the first side wall (212) and the second air duct side wall (234) are oppositely arranged, and the connection part of the second air duct side wall (234) and the air duct top wall (232) is arc-shaped.

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