Ductwork components and air conditioners

Abstract

This invention provides a duct assembly and an air conditioner. The duct assembly includes: a fan blade, which can rotate around a rotation axis, with the fan blade blowing air in a forward direction and facing away from the wind in a backward direction; and a guide ring, which is fixedly installed and has an air guide cavity. The rotation axis is collinear with the central axis of the guide ring, and both the forward-facing end and the backward-facing end of the fan blade are located within the air guide cavity. This invention ensures the guide ring effectively directs the airflow from the fan blade by aligning the fan blade's rotation axis with the central axis of the guide ring, guaranteeing directional airflow and thus increasing air velocity. By completely enclosing the fan blade within the guide ring's air guide cavity, the fan blade can effectively cut the airflow, efficiently converting its kinetic energy into wind kinetic energy, increasing outlet pressure and wind speed, thereby improving the air delivery distance of the air conditioner and enhancing its user comfort and temperature uniformity.

Description

Technical Field

[0001] This invention relates to the field of air conditioner technology, and more specifically, to an air duct assembly and an air conditioner. Background Technology

[0002] Currently, with the rapid development of air conditioning technology, users have increasingly higher requirements for products, and cannot be satisfied with just ordinary cooling and heating. Existing common air conditioners have low air outlet speeds, which results in a short air delivery distance. Especially when using air conditioners in large spaces, cold or hot air cannot be delivered to distant places due to the limited air delivery distance, resulting in poor overall comfort and temperature uniformity of the air conditioner, which cannot meet the user's comfort experience.

[0003] Currently available air conditioners, especially floor-standing air conditioners, generally use axial flow fans and lack corresponding air-gathering structures, resulting in the following disadvantages: Axial flow fans are affected by the blade shape and air outlet method. When the axial flow fan is working, the motor drives the fan blades to rotate, and the air is thrown out according to the direction of rotation, causing the air blown out by the axial flow fan to spread in all directions, with an air delivery distance of only 3 to 4 meters, which cannot meet the requirements for long-distance air delivery. Thus, in large spaces, the air conditioner cannot deliver cool or hot air to distant places, resulting in poor user comfort and temperature uniformity. Summary of the Invention

[0004] This invention provides an air duct assembly and an air conditioner to solve the problem that the air delivery distance of existing air conditioners is limited, resulting in poor user comfort and temperature uniformity.

[0005] To address the aforementioned problems, according to one aspect of the present invention, an air duct assembly is provided for use in an air conditioner. The air duct assembly includes: a fan blade, which is rotatable about a rotation axis, with the fan blade blowing in a forward direction and its leeward direction being a rearward direction; and a guide ring, which is fixedly disposed and has an air guiding cavity; wherein the rotation axis is collinear with the central axis of the guide ring, and both the forward-facing end and the rearward-facing end of the fan blade are located within the air guiding cavity.

[0006] Furthermore, the air duct assembly also includes an air-gathering grille, which is fixedly installed in the front direction of the guide ring to gather and blow out the air blown out from the guide ring; the central axis of the air-gathering grille is collinear with the rotation axis.

[0007] Furthermore, the wind-gathering grille includes: an outer ring body, which is fixedly installed; an inner ring body, the central axis of which coincides with the central axis of the outer ring body, and the radial dimension of the inner ring body is smaller than that of the outer ring body; and multiple arc-shaped ribs connecting the outer ring body and the inner ring body, which are distributed at intervals along the circumference of the inner ring body; the multiple arc-shaped ribs work together to gather the wind blown out from the guide ring.

[0008] Furthermore, the direction of rotation of the curved ribs is opposite to the direction of rotation of the fan blades.

[0009] Furthermore, the guide ring includes a cylindrical body and a flared body disposed on the cylindrical body. The cylindrical body is disposed in the front direction of the flared body. The cylindrical body has an inner cavity, and the flared body has a converging cavity. The converging cavity and the inner cavity are connected to form a guide cavity. The size of the converging cavity gradually decreases from the rear direction to the front direction. The end of the fan blade facing the front direction is located in the inner cavity, and the end of the fan blade facing the rear direction is located in the converging cavity.

[0010] Furthermore, the ratio of the axial dimension of the fan blade to the diameter of the fan blade is set to K, and the value of K ranges from 0.3 to 0.5.

[0011] Furthermore, there are multiple fan blades, which are spaced apart along a first direction, and the first direction has an angle with the forward direction; there are multiple air guide rings, which are respectively set to correspond one-to-one with the multiple fan blades; there are multiple air-gathering grilles, which are respectively set to correspond one-to-one with the multiple air guide rings.

[0012] Furthermore, the air duct assembly also includes a sweeping assembly, which is positioned in front of the air-gathering grille. The sweeping assembly adjusts the air blown out by the air-gathering grille along the sweeping direction, and the sweeping direction has an angle with the front direction.

[0013] Furthermore, the air duct assembly also includes a guide ring bracket, which has ventilation holes. The guide ring is fixedly mounted on the guide ring bracket and passes through the ventilation holes.

[0014] Furthermore, the air duct assembly also includes a mounting frame and a motor mounted on the mounting frame; the motor is connected to the fan blades and is used to drive the fan blades to rotate.

[0015] According to another aspect of the present invention, an air conditioner is provided, which includes the above-described air duct assembly.

[0016] Furthermore, the air conditioner also includes a front panel assembly and a rear housing assembly. The front panel assembly is disposed on the rear housing assembly, the rear housing assembly has a mounting cavity, the air duct assembly is disposed within the mounting cavity, the front panel assembly is used to cover the mounting cavity, and the air blown out by the air duct assembly passes through the front panel assembly.

[0017] Applying the technical solution of this invention, this invention provides a duct assembly for use in an air conditioner. The duct assembly includes: a fan blade, which can rotate around a rotation axis, with the fan blade blowing in a forward direction and the fan blade facing away from the wind in a backward direction; and a guide ring, which is fixedly installed and has a guide cavity; wherein the rotation axis is collinear with the central axis of the guide ring, and both the forward-facing end and the backward-facing end of the fan blade are located within the guide cavity. This invention ensures the airflow is effectively guided by the guide ring by aligning the rotation axis of the fan blades with the central axis of the guide ring, alleviating the problem of airflow scattering upon exiting the air conditioner and guaranteeing directional airflow. It also reduces air resistance, thereby increasing airflow velocity. Furthermore, by positioning both the forward-facing and rearward-facing ends of the fan blades within the guide cavity—meaning the guide ring completely encloses the fan blades—the fan blades can efficiently perform air-cutting work within the guide cavity. This efficiently converts the kinetic energy of the fan blades into the kinetic energy of the airflow, increasing the outlet air pressure and improving the airflow velocity. Consequently, it extends the airflow distance of the air conditioner, enhancing user comfort and temperature uniformity, resulting in a significantly improved user experience. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0019] Figure 1 An exploded view of the specific structure of the air duct assembly provided in an embodiment of the present invention is shown;

[0020] Figure 2 A partial full sectional view of the air duct assembly provided in an embodiment of the present invention is shown;

[0021] Figure 3 It shows Figure 2 A magnified view of a portion of the text;

[0022] Figure 4 A three-dimensional structural schematic diagram of the wind-gathering grille provided in an embodiment of the present invention is shown;

[0023] Figure 5 It shows Figure 4 The main view in the middle;

[0024] Figure 6 A front view of a wind turbine blade provided in an embodiment of the present invention is shown;

[0025] Figure 7 A right view of a wind turbine blade provided in an embodiment of the present invention is shown;

[0026] Figure 8 A partially enlarged view of the guide ring bracket provided in an embodiment of the present invention is shown;

[0027] Figure 9 An exploded view of the specific structure of an air conditioner provided in an embodiment of the present invention is shown;

[0028] Figure 10 A schematic diagram of experimental data for the K value provided by an embodiment of the present invention is shown.

[0029] The above figures include the following reference numerals:

[0030] 10. Wind blades;

[0031] 20. Guide ring; 21. Air guide cavity; 22. Cylinder body; 221. Inner cavity; 222. Support ring; 23. Flared body; 231. Gradient cavity;

[0032] 30. Wind-gathering grille; 31. Outer ring body; 311. Pin hole; 312. Mounting hole; 313. Annular groove; 32. Inner ring body; 33. Arc-shaped rib;

[0033] 40. Air swing assembly;

[0034] 50. Guide ring bracket; 51. Positioning pin; 52. Threaded hole;

[0035] 60. Fixture;

[0036] 70. Electric motor;

[0037] 80. Front panel assembly;

[0038] 90. Rear shell assembly; 91. Mounting cavity. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0040] like Figures 1 to 10As shown, an embodiment of the present invention provides an air duct assembly for use in an air conditioner. The air duct assembly includes: a fan blade 10, which is rotatable about a rotation axis, with the fan blade 10 blowing air in a forward direction and the fan blade 10 blowing air in a backward direction; and a guide ring 20, which is fixedly installed and has an air guide cavity 21. The rotation axis is collinear with the central axis of the guide ring 20, and both the forward-facing end and the backward-facing end of the fan blade 10 are located within the air guide cavity 21. (The forward and backward directions are...) Figure 1 (horizontal front and back direction)

[0041] This invention ensures that the airflow from the fan blade 10 is effectively guided by the guide ring 20, by aligning the rotation axis of the fan blade 10 with the central axis of the guide ring 20. This alleviates the problem of airflow scattering immediately upon airflow from the air conditioner, ensures directional airflow, reduces air resistance, and thus increases airflow velocity. Furthermore, by aligning both the forward-facing and rearward-facing ends of the fan blade 10 within the guide cavity 21 (i.e., the guide ring 20 completely encloses the fan blade 10), the fan blade 10 can effectively cut the airflow within the guide cavity 21 of the guide ring 20. This efficiently converts the kinetic energy of the fan blade 10 into the kinetic energy of the wind, increasing the outlet pressure and wind speed, thereby improving the airflow distance of the air conditioner, enhancing user comfort and temperature uniformity, and significantly improving the user experience.

[0042] In one specific embodiment of the present invention, such as Figure 1 As shown, the wind blade 10 has 5 blades, but it can also be a wind blade with other numbers of blades (such as a 3-blade wind blade). It can be flexibly set according to actual usage needs to achieve better air blowing effect.

[0043] like Figure 1 , Figure 2 , Figure 4 As shown, the air duct assembly also includes a wind-gathering grille 30, which is fixedly positioned in front of the guide ring 20 to gather and expel the air blown out from the guide ring 20. The central axis of the wind-gathering grille 30 is collinear with the rotation axis. By setting the wind-gathering grille 30, the wind gathering effect is improved; by setting the central axis of the wind-gathering grille 30 to be collinear with the rotation axis, the wind gathering effect is further improved, and the resistance of the wind-gathering grille 30 to the wind is reduced, alleviating the problem of air dispersion.

[0044] like Figure 4 and Figure 5As shown, the wind-gathering grille 30 includes: an outer ring body 31, which is fixedly installed; an inner ring body 32, the central axis of which coincides with the central axis of the outer ring body 31, and the radial dimension of the inner ring body 32 is smaller than that of the outer ring body 31; and multiple arc-shaped ribs 33 connecting the outer ring body 31 and the inner ring body 32, which are distributed at intervals along the circumference of the inner ring body 32. The multiple arc-shaped ribs 33 work together to gather the air blown out from the guide ring 20. By setting multiple arc-shaped ribs 33, it is ensured that the air is spirally blown out in a certain direction after passing through the wind-gathering grille 30, which improves both the directionality of the air (i.e., the characteristic of stable blowing in one direction) and the air delivery distance.

[0045] In one specific embodiment of the present invention, the inner ring body 32 is located in the front direction of the outer ring body 31, and the two are connected by a plurality of arc-shaped ribs 33. With this arrangement, under the condition that the outer contour of the outer ring body 31 is fixed, compared with the inner ring body 32 being located inside the outer ring body 31, the length of the arc-shaped ribs 33 is effectively increased, thereby improving the wind regulation effect of the arc-shaped ribs 33.

[0046] It should be noted that, in another embodiment of the present invention not shown, the inner ring 32 may be a hollow ring structure or a solid disc structure, which can be flexibly set according to actual usage requirements to achieve better adjustment effect.

[0047] In one specific embodiment of the present invention, such as Figure 3 As shown, the outer wall of the guide ring 20 is provided with a support ring 222, and the outer ring body 31 is provided with an annular groove 313. Through the cooperation of the support ring 222 and the annular groove 313 (that is, the support ring 222 passes into the annular groove 313 to form a limiting cooperation), it is convenient to install and align the wind-gathering grille 30 and the guide ring 20, thereby ensuring that the central axis of the wind-gathering grille 30, the central axis of the guide ring 20 and the rotation axis are collinear, and also ensuring the reliable cooperation between the wind-gathering grille 30 and the guide ring 20, avoiding the adverse phenomenon of air leakage between the wind-gathering grille 30 and the guide ring 20.

[0048] like Figure 5 and Figure 6 As shown, the rotation direction of the arc-shaped rib 33 is opposite to that of the fan blade 10. This arrangement further ensures that the wind is blown out from the wind-gathering grille 30 in a spiral form, maximizing the air delivery distance and wind directionality under the condition of constant wind speed.

[0049] like Figure 2As shown, the guide ring 20 includes a cylindrical body 22 and a flared body 23 disposed on the cylindrical body 22. The cylindrical body 22 is disposed in the front direction of the flared body 23. The cylindrical body 22 has an inner cavity 221, and the flared body 23 has a tapering cavity 231. The tapering cavity 231 and the inner cavity 221 are connected to form a guide cavity 21. The size of the tapering cavity 231 gradually decreases from the rear direction to the front direction. The front-facing end of the fan blade 10 is located in the inner cavity 221, and the rear-facing end of the fan blade 10 is located in the tapering cavity 231. This design ensures that the guide ring 20 completely covers the fan blade 10, allowing the fan blade 10 to thoroughly cut the airflow within the guide cavity 21 of the guide ring 20. This efficiently converts the kinetic energy of the fan blade 10 into the kinetic energy of the wind, increasing the outlet pressure, raising the wind speed, and thus increasing the air delivery distance. Furthermore, the tapered cavity 231 within the flared body 23 ensures rapid and smooth airflow at the inlet (i.e., behind the guide ring 20). Compared to a conventional straight-tube guide ring 20, the structure of the flared body 23 ensures smooth and low-noise operation during high-volume air intake and effectively increases the airflow rate.

[0050] like Figure 6 and Figure 7 As shown, the ratio of the axial dimension of the fan blade 10 to its diameter is set to K, and the value of K ranges from 0.3 to 0.5. By setting the range of K, the air delivery efficiency of the fan blade is maximized while keeping the fan speed constant. This improves energy efficiency and ensures that the air it blows can travel a long distance, meeting the requirements for long-distance air delivery.

[0051] like Figure 1 As shown, there are multiple fan blades 10, which are spaced apart along a first direction, forming an angle with the forward direction; there are multiple guide rings 20, each corresponding to one of the multiple fan blades 10; and there are multiple air-gathering grilles 30, each corresponding to one of the multiple guide rings 20. By setting multiple fan blades 10, and correspondingly setting multiple guide rings 20 and air-gathering grilles 30, the flexibility and adjustability of the air supply of the duct assembly are improved, as is the applicability of the duct assembly. Furthermore, it provides structural support for subsequent intelligent control of the multiple fan blades 10 operating individually or in combination.

[0052] It should be noted that, in one specific embodiment of the present invention, the first direction is perpendicular to the forward direction, that is, the first direction is... Figure 1 The vertical direction is designed to ensure that the fan blades 10 deliver air in the vertical direction.

[0053] like Figure 1As shown, the air duct assembly also includes a sweeping component 40, which is positioned in front of the air-gathering grille 30. The sweeping component 40 adjusts the airflow blown out of the air-gathering grille 30 along the sweeping direction, which forms an angle with the front direction. By incorporating the sweeping component 40, the air duct assembly's freedom and flexibility in adjusting the airflow it blows out are improved, meeting the user's needs for multi-angle airflow adjustment and enhancing comfort and applicability.

[0054] It should be noted that: in one specific embodiment of the present invention, such as Figure 1 As shown, the sweeping direction is perpendicular to the forward direction, that is, the sweeping direction is... Figure 1 The left and right directions in the middle.

[0055] like Figure 1 As shown, the air duct assembly also includes a guide ring bracket 50, which has ventilation holes. The guide ring 20 is fixedly mounted on the guide ring bracket 50 and passes through the ventilation holes. By setting the guide ring bracket 50, the guide ring 20 is effectively supported, providing structural support for the reliable installation and relative positioning of multiple guide rings 20 in the future.

[0056] It should be noted that, in a specific embodiment of the present invention, the guide ring 20 and the guide ring bracket 50 can be designed as separate structures or integral injection molded structures, and can be flexibly selected according to actual use needs and processing requirements.

[0057] In one specific embodiment of the present invention, such as Figure 5 , Figure 8 As shown, the guide ring bracket 50 is provided with a plurality of positioning pins 51 and a plurality of threaded holes 52 at intervals. The outer ring body 31 of the wind-gathering grille 30 is provided with a plurality of pin holes 311 and a plurality of mounting holes 312 at intervals. The plurality of pin holes 311 and the plurality of positioning pins 51 are matched one-to-one to facilitate the positioning and installation of the wind-gathering grille 30 on the guide ring bracket 50. After the plurality of pin holes 311 and the plurality of positioning pins 51 are matched one-to-one, the plurality of threaded holes 52 are matched one-to-one with the plurality of mounting holes 312. The screws are matched with the threaded holes 52 and the mounting holes 312 in sequence to firmly fix the wind-gathering grille 30 on the guide ring bracket 50.

[0058] like Figure 1 As shown, the air duct assembly also includes a mounting bracket 60 and a motor 70 mounted on the mounting bracket 60; the motor 70 is connected to the fan blade 10 and is used to drive the fan blade 10 to rotate. By setting the motor 70, the rotation of the fan blade 10 is adjustable, ensuring the smooth rotation of the fan blade 10, avoiding large fluctuations in the blown air, and improving comfort.

[0059] In one specific embodiment of the present invention, the fan blade 10 is an axial flow fan blade, and the motor 70 is fixedly mounted on the fixing frame 60 by four bolts. The fan blade 10 has an anti-rotation shaft hole, which is engaged with the motor rotating shaft on the motor 70. The cross-section (i.e., the cross-section perpendicular to the axis) of the anti-rotation shaft hole is a truncated circular shape (e.g., a semi-circular structure with one side being an arc and the other side being a straight line). The external shape of the motor rotating shaft is adapted to the anti-rotation shaft hole to prevent relative rotation between the motor rotating shaft and the anti-rotation shaft hole. The motor rotating shaft is locked to the fan blade 10 by an anti-loosening nut to drive the fan blade 10 to rotate.

[0060] The present invention also provides an air conditioner including the aforementioned air duct assembly. The air conditioner using the present invention offers advantages such as long air delivery distance, high energy efficiency, low noise, good user comfort and temperature uniformity, thus satisfying the user's comfort experience.

[0061] like Figure 9 As shown, the air conditioner also includes a front panel assembly 80 and a rear housing assembly 90. The front panel assembly 80 is mounted on the rear housing assembly 90, which has a mounting cavity 91. The air duct assembly is disposed within the mounting cavity 91. The front panel assembly 80 is used to shield the mounting cavity 91, and the air blown out by the air duct assembly passes through the front panel assembly 80 before being blown out. This arrangement simplifies the overall structure of the air conditioner while ensuring effective protection of the air duct assembly by the front panel assembly 80 and the rear housing assembly 90.

[0062] It is worth noting that: Figure 10 As shown, a controlled variable experiment was conducted using a 5-blade wind turbine. K = axial dimension of the wind turbine blade / diameter of the wind turbine blade. The specific measured value of K is ( Figure 10 (middle horizontal axis) and air supply distance ( Figure 10 The corresponding numerical relationships between the central and vertical axes are shown in the table below:

[0063] K value Air supply distance (m) 0.1 7.1 0.2 8.2 0.3 9 0.4 9.3 0.5 9.2 0.6 8.5 0.7 8.3 0.8 8 0.9 7.5

[0064] Based on the above data and Figure 10 Analysis shows that when the value of K is in the range of 0.3 to 0.5, the distance of the blown air is relatively long, which meets the requirements of long-distance air supply.

[0065] In summary, this invention provides a duct assembly and an air conditioner. By aligning the rotation axis of the fan blade 10 with the central axis of the guide ring 20, the invention ensures the guide ring 20 effectively directs the airflow from the fan blade 10, alleviating the problem of airflow dispersion upon airflow from the air conditioner, ensuring directional airflow, reducing air resistance, and thus increasing airflow velocity. Furthermore, by arranging both the forward-facing and rearward-facing ends of the fan blade 10 within the guide cavity 21, i.e., by completely enclosing the fan blade 10 within the guide cavity 21, the fan blade 10 can effectively perform air cutting within the guide cavity 21 of the guide ring 20. This efficiently converts the kinetic energy of the fan blade 10 into the kinetic energy of the wind, increasing the outlet air pressure and improving the wind speed, thereby increasing the air delivery distance of the air conditioner, enhancing user comfort and temperature uniformity, and significantly improving the user experience.

[0066] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, 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.

[0067] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0068] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0069] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0070] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0071] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A duct assembly, characterized in that, The air duct assembly is used in an air conditioner, and the air duct assembly includes: The wind blade (10) can rotate around the rotation axis. The wind direction of the wind blade (10) is the forward direction and the leeward direction is the rear direction. A guide ring (20) is fixedly installed, and the guide ring (20) has an air guide cavity (21). The rotation axis is collinear with the central axis of the guide ring (20), and the end of the fan blade (10) facing the forward direction and the end facing the rear direction are both located in the air guide cavity (21). The ratio of the axial dimension of the fan blade (10) to the diameter of the fan blade (10) is set to K, and the value of K is in the range of 0.3~0.5; The air duct assembly also includes a wind-gathering grille (30), which is fixedly disposed in the front direction of the guide ring (20) for gathering and blowing out the air blown out from the guide ring (20); The air duct assembly also includes a sweeping assembly (40), which is disposed in the front direction of the wind-gathering grille (30). The sweeping assembly (40) adjusts the air blown out by the wind-gathering grille (30) along the sweeping direction, and the sweeping direction has an angle with the front direction. The wind-gathering grille (30) includes: an outer ring body (31), which is fixedly installed; an inner ring body (32), the central axis of which coincides with the central axis of the outer ring body (31), and the radial dimension of the inner ring body (32) is smaller than the radial dimension of the outer ring body (31); and an arc-shaped rib (33), which connects the outer ring body (31) and the inner ring body (32). The inner ring body (32) is located in front of the outer ring body (31); The outer wall of the guide ring (20) is provided with a support ring (222), and the outer ring body (31) is provided with an annular groove (313); the support ring (222) passes into the annular groove (313) and is limited to cooperate with the annular groove (313); the central axis of the wind-gathering grille (30), the central axis of the guide ring (20) and the rotation axis are collinear.

2. The air duct assembly according to claim 1, characterized in that, There are multiple arc-shaped ribs (33), and the multiple arc-shaped ribs (33) are distributed at intervals along the circumference of the inner ring body (32); the multiple arc-shaped ribs (33) work together to gather the wind blown out from the guide ring (20).

3. The air duct assembly according to claim 2, characterized in that, The direction of rotation of the arc-shaped rib (33) is opposite to the direction of rotation of the fan blade (10).

4. The air duct assembly according to claim 1, characterized in that, The guide ring (20) includes a cylindrical body (22) and a flared body (23) disposed on the cylindrical body (22). The cylindrical body (22) is disposed in the front direction of the flared body (23). The cylindrical body (22) has an inner cavity (221). The flared body (23) has a tapering cavity (231). The tapering cavity (231) and the inner cavity (221) are connected to form the air guide cavity (21). The size of the tapering cavity (231) gradually decreases from the rear direction to the front direction. The end of the fan blade (10) facing the front direction is located in the inner cavity (221), and the end of the fan blade (10) facing the rear direction is located in the tapering cavity (231).

5. The air duct assembly according to claim 1, characterized in that, There are multiple wind blades (10), and the multiple wind blades (10) are spaced apart along a first direction, and the first direction has an angle with the forward direction; there are multiple guide rings (20), which are respectively arranged one-to-one with the multiple wind blades (10); there are multiple wind-gathering grilles (30), which are respectively arranged one-to-one with the multiple guide rings (20).

6. The air duct assembly according to claim 1, characterized in that, The air duct assembly also includes a guide ring bracket (50), which has ventilation holes. The guide ring (20) is fixedly mounted on the guide ring bracket (50) and passes through the ventilation holes.

7. The air duct assembly according to claim 1, characterized in that, The air duct assembly also includes a mounting frame (60) and a motor (70) mounted on the mounting frame (60); the motor (70) is connected to the fan blade (10) and is used to drive the fan blade (10) to rotate.

8. An air conditioner, characterized in that, The air conditioner includes the air duct assembly as described in any one of claims 1 to 7.

9. The air conditioner according to claim 8, characterized in that, The air conditioner further includes a front panel assembly (80) and a rear housing assembly (90), the front panel assembly (80) being disposed on the rear housing assembly (90), the rear housing assembly (90) having a mounting cavity (91), the air duct assembly being disposed within the mounting cavity (91), the front panel assembly (80) being used to shield the mounting cavity (91), and the air blown out by the air duct assembly passing through the front panel assembly (80).

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