Fan components and fresh air modules of air conditioners, air conditioners

Abstract

This invention discloses a fan assembly and a fresh air module for an air conditioner. The fan assembly includes: a volute defining an exhaust wheel cavity, an air inlet channel, and an air outlet channel, with the exhaust wheel cavity connecting the air inlet channel and the air outlet channel; an exhaust wheel; and an air outlet channel located around the exhaust wheel, having a first channel wall and a second channel wall. The inner surface of the second channel wall includes a first surface. The air outlet channel includes a first air outlet section located between the first surface and the inner surface of the first channel wall. The first surface gradually moves away from the inner surface of the first channel wall along the air outlet direction of the air outlet channel, so that the axial dimension of the first air outlet section in the exhaust wheel gradually increases along the air outlet direction within the air outlet channel. According to the embodiment of the invention, by gradually increasing the axial dimension of the air outlet channel in the exhaust wheel, the fan assembly enables sufficient air diffusion as air flows along the air outlet channel, thereby releasing airflow pressure and achieving noise reduction.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and more specifically, to a fan assembly and a fresh air module for an air conditioner, and an air conditioner. Background Technology

[0002] In related technologies, fans are used to transport air to a designated area. When using fans, they generate noise, and excessive noise can affect the user experience. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention proposes a fan assembly that, by gradually increasing the size of the air outlet channel along the axial direction of the impeller, enables the air to be fully diffused as it flows along the air outlet channel, thereby releasing airflow pressure and achieving a noise reduction effect.

[0004] The present invention also proposes a fresh air module for an air conditioner having the aforementioned fan assembly.

[0005] The present invention also proposes an air conditioner having the aforementioned fresh air module.

[0006] According to a first aspect of the present invention, a fan assembly includes: a volute defining a fan wheel cavity, an air inlet channel, and an air outlet channel, the fan wheel cavity communicating between the air inlet channel and the air outlet channel; and a fan wheel rotatably disposed in the fan wheel cavity; wherein the air outlet channel is located on the periphery of the fan wheel and has a first channel wall and a second channel wall disposed opposite to each other in the axial direction of the fan wheel, the inner surface of the second channel wall including a first surface, the air outlet channel including a first air outlet section located between the first surface and the inner surface of the first channel wall, the first surface gradually moving away from the inner surface of the first channel wall along the air outlet direction of the air outlet channel, such that the size of the first air outlet section in the axial direction of the fan wheel gradually increases along the air outlet direction of the air in the air outlet channel.

[0007] According to an embodiment of the present invention, the fan assembly gradually increases the size of the air outlet channel along the axial direction of the impeller, so that the air can be fully diffused when flowing along the air outlet channel, thereby releasing the airflow pressure and achieving a noise reduction effect.

[0008] In addition, the wind turbine assembly according to the above embodiments of the present invention may also have the following additional technical features:

[0009] According to some embodiments of the present invention, the first surface is a curved surface that gradually moves away from the inner surface of the first channel wall along the air outlet direction of the air outlet channel.

[0010] According to some embodiments of the present invention, the air outlet channel is located above the impeller cavity, and the first surface gradually approaches the inner surface of the first channel wall from top to bottom.

[0011] According to some embodiments of the present invention, the inner surface of the first channel wall is perpendicular to the axis of the wind turbine.

[0012] According to some embodiments of the present invention, the dimension A of the end of the first air outlet section near the outlet of the air outlet channel in the axial direction of the impeller is denoted as A, and the dimension B of the end of the first air outlet section away from the outlet of the air outlet channel in the axial direction of the impeller is denoted as B, where A / B is 1.5-3.

[0013] According to some embodiments of the present invention, the air outlet channel further includes a second air outlet section, which connects the impeller cavity and the first air outlet section; wherein, the inner surface of the second channel wall further includes a second surface, the second air outlet section is located between the second surface and the inner surface of the first channel wall, and both the second surface and the inner surface of the first channel wall are perpendicular to the axis of the impeller.

[0014] According to some optional embodiments of the present invention, the distance between the second surface and the inner surface of the first channel wall in the axial direction of the impeller is equal to the axial dimension of the end of the first air outlet section away from the outlet of the air outlet channel in the axial direction of the impeller, and the second surface and the first surface are connected by a circular arc transition.

[0015] According to some embodiments of the present invention, the volute is provided with a noise reduction structure, and at least a portion of the noise reduction structure corresponds to the position of the first air outlet section.

[0016] According to some optional embodiments of the present invention, the noise reduction structure includes: a first cover, the first cover being disposed on the outside of the first channel wall and defining a first sound absorption cavity between the first cover and the first channel wall, the first sound absorption cavity being in communication with the air outlet channel.

[0017] According to some specific embodiments of the present invention, a first sound-absorbing element is provided inside the first sound-absorbing cavity.

[0018] According to some embodiments of the present invention, the air outlet channel further comprises a third channel wall and a fourth channel wall, the third channel wall being disposed adjacent to the volute tongue of the volute and connected between the first channel wall and the second channel wall, and the fourth channel wall being disposed opposite to the third channel wall and connected between the first channel wall and the second channel wall.

[0019] According to some alternative embodiments of the present invention, the distance between the inner surface of the third channel wall and the inner surface of the fourth channel wall gradually decreases at least partially along the air outlet direction of the air outlet channel.

[0020] According to some optional embodiments of the present invention, the volute is provided with a noise reduction structure, and at least a portion of the noise reduction structure corresponds to the position of the first air outlet section.

[0021] According to some specific embodiments of the present invention, the fourth channel wall and the outlet of the impeller cavity are arranged opposite to each other, and the noise reduction structure includes: a second cover, the second cover is disposed on the outside of the fourth channel wall and defines a second sound absorption cavity between the second cover and the fourth channel wall, the second sound absorption cavity being in communication with the air outlet channel.

[0022] In some embodiments, a second sound-absorbing element is provided inside the second sound-absorbing cavity.

[0023] According to a second aspect of the present invention, a fresh air module for an air conditioner is provided, the fresh air module for the air conditioner including a fan assembly as described in the first aspect of the present invention, wherein the inlet of the air inlet channel is a fresh air inlet; and a filter element disposed within the air inlet channel.

[0024] According to an embodiment of the present invention, the fresh air module of the air conditioner utilizes the fan assembly described in the first aspect of the present invention to gradually increase the size of the air outlet channel in the axial direction of the impeller, so that the air can be fully diffused when flowing along the air outlet channel to release the airflow pressure and achieve a noise reduction effect.

[0025] According to a third aspect of the present invention, an air conditioner is provided, the air conditioner including the fan assembly described in the first aspect of the present invention, or including the fresh air module of the air conditioner described in the second aspect of the present invention.

[0026] According to an embodiment of the present invention, an air conditioner utilizes a fan assembly as described in an embodiment of the first aspect of the present invention, or a fresh air module as described in an embodiment of the second aspect of the present invention, by gradually increasing the size of the air outlet duct in the axial direction of the impeller, so that the air can be fully diffused when flowing along the air outlet duct, thereby releasing the airflow pressure and achieving a noise reduction effect.

[0027] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0028] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0029] Figure 1 This is a schematic diagram of the structure of a fan assembly according to an embodiment of the present invention;

[0030] Figure 2 This is a top view of a wind turbine assembly according to an embodiment of the present invention;

[0031] Figure 3 This is a front view of a fan assembly according to an embodiment of the present invention;

[0032] Figure 4 yes Figure 3 Sectional view at point AA;

[0033] Figure 5 yes Figure 3 Sectional view at point BB;

[0034] Figure 6 This is a side view of a wind turbine assembly according to an embodiment of the present invention.

[0035] Attached label: 1. Fresh air module;

[0036] 100. Volute; 10. Wind turbine cavity;

[0037] 30. Air outlet duct; 301. First air outlet section; 302. Second air outlet section; 303. Fresh air outlet; 31. First duct wall; 32. Second duct wall; 321. First surface; 322. Second surface; 33. Third duct wall; 34. Fourth duct wall;

[0038] 500. Windmill;

[0039] 61. First enclosure; 612. First vent; 62. Second enclosure; 622. Second vent;

[0040] 71. First sound-absorbing component; 72. Second sound-absorbing component;

[0041] 8. Filter components. Detailed Implementation

[0042] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0043] The following description of a wind turbine assembly according to an embodiment of the present invention is based on the accompanying drawings.

[0044] like Figures 1-6 As shown, the wind turbine assembly according to an embodiment of the present invention includes a volute 100 and a wind turbine 500.

[0045] The volute 100 defines the impeller cavity 10, the air inlet channel, and the air outlet channel 30. The impeller cavity 10 is connected between the air inlet channel and the air outlet channel 30. The impeller 500 is rotatably disposed in the impeller cavity 10. When the impeller 500 rotates, it can drive the external air into the air inlet channel, flow along the air inlet channel to the impeller cavity 10, and then enter the air outlet channel 30, flowing along the air outlet channel 30 to the designated area.

[0046] The air outlet duct 30 is located on the periphery of the impeller 500. The air outlet duct 30 has a first channel wall 31 and a second channel wall 32. The first channel wall 31 and the second channel wall 32 are arranged opposite to each other in the axial direction of the impeller 500. The inner surface of the second channel wall 32 includes a first surface 321. The air outlet duct 30 includes a first air outlet section 301, which is located between the first surface 321 and the inner surface of the first channel wall 31.

[0047] In this process, the first surface 321 gradually moves away from the inner surface of the first channel wall 31 along the air outlet direction of the air outlet channel 30. Thus, in the air outlet direction of the air outlet channel 30, the distance between the first surface 321 and the first channel wall 31 in the axial direction of the impeller 500 gradually increases, thereby gradually increasing the size of the first air outlet section 301 in the axial direction of the impeller 500. In this way, when the air flows along the air outlet channel 30 to the designated area, it can be fully diffused to release the airflow pressure and achieve a noise reduction effect.

[0048] Therefore, according to the embodiment of the present invention, the fan assembly gradually increases the size of the air outlet channel 30 in the axial direction of the impeller 500, so that when the air flows along the air outlet channel 30, the air can be fully diffused to release the airflow pressure and achieve the noise reduction effect.

[0049] The following description, with reference to the accompanying drawings, describes a wind turbine assembly according to a specific embodiment of the present invention.

[0050] In some specific embodiments of the present invention, such as Figures 1-6 As shown, the wind turbine assembly includes a volute 100 and a rotor 500.

[0051] In some embodiments of the present invention, such as Figure 5 As shown, the first surface 321 is a curved surface that gradually moves away from the inner surface of the first channel wall 31 along the air outlet direction of the air outlet channel 30, so that when the air flows along the air outlet channel 30, the air can flow smoothly along the first surface 321 to the outlet of the air outlet channel 30, thereby realizing the expansion of the air to release the airflow pressure and achieve the noise reduction effect.

[0052] Specifically, the first surface 321 is made curved to facilitate the control of the gradual increase in the size of the air outlet duct 30 in the axial direction of the impeller 500. For example, the amplitude of the gradual increase in the size of the air outlet duct 30 in the axial direction of the impeller 500 can be gradually increased to achieve sufficient air diffusion and reduce noise.

[0053] At the same time, making the first surface 321 curved can reduce the possibility of the first surface 321 interfering with the air flow, thereby ensuring that the air can flow smoothly in the air outlet channel 30.

[0054] In some embodiments of the present invention, such as Figure 5 As shown, the air outlet channel 30 is located above the impeller cavity 10. The first surface 321 gradually approaches the inner surface of the first channel wall 31 from top to bottom, so that the air outlet channel 30 forms an outwardly expanding shape in the upward direction, so that when the air flows from bottom to top along the air outlet channel 30, the airflow pressure can be gradually released to achieve the noise reduction effect.

[0055] In some embodiments, such as Figure 4 , Figure 5 As shown, the axial direction of the impeller 500 extends in the left and right direction, the first air duct wall is the right side wall of the air outlet duct 30, and the second air duct wall is the left side wall of the air outlet duct 30.

[0056] In the direction from back to front, the first surface 321 extends to the left along a curve, and in the direction from top to bottom, the first surface 321 extends to the right at an angle. In the direction from back to front, the size of the air outlet channel 30 gradually increases in the left and right directions, and in the direction from bottom to top, the size of the air outlet channel 30 also gradually increases in the left and right directions. This allows the airflow pressure to be fully released when the air flows along the air outlet channel 30, thereby achieving a better noise reduction effect.

[0057] In some embodiments of the present invention, such as Figure 5 As shown, the inner surface of the first channel wall 31 is perpendicular to the axis of the impeller 500, so as to guide the flow of air by utilizing the inner surface of the first channel wall 31.

[0058] In some embodiments, the impeller 500 extends axially in the left-right direction, and the inner surface of the first channel wall 31 extends in the front-back direction to guide the air in the air duct 30 to flow forward, thereby directing the air to a designated area.

[0059] In addition, the inner surface of the first channel wall 31 is extended in the front-back direction to facilitate the formation of a regularly shaped volute 100.

[0060] In some embodiments of the present invention, such as Figure 5As shown, the dimension of the first air outlet section 301 near the outlet of the air outlet channel 30 in the axial direction of the impeller 500 is A, and the dimension of the first air outlet section 301 away from the outlet of the air outlet channel 30 in the axial direction of the impeller 500 is B. The ratio of A to B is 1.5-3, so as to control the increase in the dimension of the air outlet channel 30 in the axial direction of the impeller 500, thereby achieving better air diffusion and reducing noise.

[0061] In some embodiments of the present invention, such as Figure 5 As shown, the air outlet channel 30 also includes a second air outlet section 302, which connects the impeller cavity 10 and the first air outlet section 301. The inner surface of the second channel wall 32 also includes a second surface 322. The second air outlet section 302 is located between the second surface 322 and the inner surface of the first channel wall 31. Both the second surface 322 and the inner surface of the first channel wall 31 are perpendicular to the axis of the impeller 500, so that when the air in the impeller cavity 10 just enters the air outlet channel 30, the air first enters the second air outlet section 302 and then enters the first air outlet section 301.

[0062] Specifically, when air enters the air outlet duct 30 from the impeller cavity 10, the air flow direction changes. If the air directly enters the first air outlet section 301, turbulence is likely to occur after entering the first air outlet section 301 due to the changing size of the first air outlet section 301. Therefore, the air first enters the second air outlet section 302, where it has a stable flow direction before flowing to the first air outlet section 301, in order to reduce the turbulence of the air in the air outlet duct 30 and thus reduce noise.

[0063] In some optional embodiments of the present invention, the distance between the second surface 322 and the inner surface of the first channel wall 31 in the axial direction of the impeller 500 is equal to the axial dimension of the end of the first air outlet section 301 away from the outlet of the air outlet channel 30 in the axial direction of the impeller 500, and the second surface 322 and the first surface 321 are connected by an arc transition, so as to avoid the air from accumulating at the junction of the first surface 321 and the second surface 322 when the air flows from the second air outlet section 302 to the first air outlet section 301, thereby reducing the turbulence of the air in the air outlet channel 30 and reducing the generation of noise.

[0064] In some embodiments of the present invention, the volute 100 is provided with a noise reduction structure, and at least part of the noise reduction structure corresponds to the position of the first air outlet section 301, so that when air flows along the first air outlet section 301, the noise in the air outlet channel 30 can be reduced by the noise reduction structure, thereby reducing the noise transmitted to the external environment.

[0065] In some alternative embodiments of the present invention, such as Figure 1 , Figure 5As shown, the noise reduction structure includes a first cover 61, which is located on the outside of the first channel wall 31 and defines a first sound absorption cavity between itself and the first channel wall 31. The first sound absorption cavity is connected to the air outlet channel 30, and noise in the air outlet channel 30 can enter the first sound absorption cavity to consume the energy in the sound and thus reduce the noise.

[0066] In some specific embodiments of the present invention, such as Figure 5 As shown, a first sound-absorbing component 71 is provided in the first sound-absorbing cavity. Vibrations in the air outlet channel 30 can enter the first sound-absorbing cavity. The first sound-absorbing component 71 in the first sound-absorbing cavity can buffer the vibration in the air, thereby absorbing the sound in the air outlet channel 30, reducing the noise in the air outlet channel 30, thereby reducing the noise transmitted from the outlet of the air outlet channel 30 and reducing the noise transmitted to the designated area.

[0067] In some embodiments, such as Figure 4 As shown, the first channel wall 31 is provided with a plurality of spaced first ventilation openings 612. Noise in the air outlet channel 30 can enter the first sound absorption cavity through the first ventilation openings 612, so that the first sound absorption component 71 of the first sound absorption cavity can buffer the vibration in the air, thereby absorbing the noise in the air outlet channel 30 and performing noise reduction treatment on the air outlet channel 30 to reduce the noise transmitted from the outlet of the air outlet channel 30 and reduce the noise transmitted to the designated area.

[0068] In some embodiments of the present invention, such as Figure 4 As shown, the air outlet duct 30 also has a third channel wall 33 and a fourth channel wall 34. The third channel wall 33 is arranged adjacent to the volute tongue of the volute 100 and is connected between the first channel wall 31 and the second channel wall 32. The fourth channel wall 34 is arranged opposite to the third channel wall 33 and is connected between the first channel wall 31 and the second channel wall 32 to form the air outlet duct 30, so that air can flow along the air outlet duct 30 to the designated area.

[0069] In some optional embodiments of the present invention, the distance between the inner surface of the third channel wall 33 and the inner surface of the fourth channel wall 34 gradually decreases at least partially along the air outlet direction of the air outlet channel 30, so that the change trend of the cross-section of the air outlet channel 30 is relatively gentle, so as to avoid the sudden increase or decrease of air speed when the air flows along the air outlet channel 30, thereby facilitating the uniform flow of air and reducing the generation of noise.

[0070] Specifically, in the direction of air outlet, the distance between the inner surface of the first channel wall 31 and the first surface 321 gradually increases, while the distance between the inner surface of the third channel wall 33 and the inner surface of the fourth channel wall 34 gradually decreases, so that the change trend of the cross-section of the air outlet channel 30 is relatively gentle, so as to avoid the sudden increase or decrease of air speed when the air flows along the air outlet channel 30, thereby facilitating the uniform flow of air and reducing the generation of noise.

[0071] In some embodiments, such as Figure 4 , Figure 5 As shown, the axial direction of the impeller 500 extends in the left-right direction. The first channel wall 31 is the right side wall of the air outlet channel 30, the second channel wall 32 is the left side wall of the air outlet channel 30, the third channel wall 33 is the upper side wall of the air outlet channel 30, and the fourth channel wall 34 is the lower side wall of the air outlet channel 30. The air in the air outlet channel 30 flows in the direction from back to front (it should be understood that the above direction is only for the convenience of describing the attached drawings and does not limit the actual installation position and direction of the fan assembly).

[0072] In the direction from back to front, the distance between the inner surface of the first channel wall 31 and the first surface 321 gradually increases, while the distance between the inner surface of the third channel wall 33 and the inner surface of the fourth channel wall 34 gradually decreases. This makes the change trend of the cross-section of the air outlet channel 30 more gradual, so as to avoid the sudden increase or decrease of air speed when the air flows along the air outlet channel 30, thereby facilitating the uniform flow of air and reducing the generation of noise.

[0073] In some optional embodiments of the present invention, the volute 100 is provided with a noise reduction structure, and at least part of the noise reduction structure corresponds to the position of the first air outlet section 301, so as to reduce the noise in the first air outlet section 301, thereby reducing the noise transmitted to the designated area.

[0074] Specifically, the first air outlet section 301 is located between the second air outlet section 302 and the outlet of the air outlet duct 30. The first air outlet section 301 is set close to the outlet of the air outlet duct 30. By performing noise reduction treatment on the first air outlet section 301, the noise transmitted from the outlet of the air outlet duct 30 to the designated area can be reduced, so as to achieve a better noise reduction effect.

[0075] In some specific embodiments of the present invention, the fourth channel wall 34 and the outlet of the impeller cavity 10 are arranged opposite to each other. The noise reduction structure includes a second cover 62, which is located on the outside of the fourth channel wall 34 and defines a second sound absorption cavity between itself and the fourth channel wall 34. The second sound absorption cavity is connected to the air outlet channel 30 so as to reduce the noise in the air outlet channel 30 by utilizing the second sound absorption cavity.

[0076] Specifically, the fourth channel wall 34 is positioned opposite to the outlet of the impeller cavity 10. When the air in the impeller cavity 10 flows into the air outlet 30, it has an impact force on the fourth channel wall 34, resulting in a large air pressure at the fourth channel wall 34, which easily generates noise. The second cover 62 is placed on the outside of the fourth channel wall 34 to form a second sound-absorbing cavity on the outside of the fourth channel wall 34, thereby facilitating the entry of noise into the second sound-absorbing cavity and reducing the impact of airflow on the fourth channel wall 34, thus reducing airflow noise.

[0077] In some embodiments, the thickness of the second sound-absorbing cavity is between 5mm and 30mm. Specifically, the distance between the fourth channel wall 34 and the second cover 62 is between 5mm and 30mm, so that the second sound-absorbing cavity 612 can achieve a better noise reduction effect.

[0078] In some embodiments, such as Figure 4 As shown, a second sound-absorbing component 72 is provided in the second sound-absorbing cavity. Vibrations in the air outlet channel 30 can enter the second sound-absorbing cavity. The second sound-absorbing component 72 in the second sound-absorbing cavity can buffer the vibrations in the air, thereby absorbing the sound in the air outlet channel 30, reducing the noise of the air outlet channel 30, and reducing the noise transmitted from the outlet of the air outlet channel 30 to the designated area.

[0079] The first surface 321 gradually moves away from the inner surface of the first channel wall 31 along the air outlet direction of the air outlet channel 30, so that the size of the first air outlet section 301 in the axial direction of the impeller 500 gradually increases along the air outlet direction in the air outlet channel 30. This makes the size of the fourth channel wall 34 in the axial direction of the impeller 500 larger and larger, thereby increasing the surface area of ​​the fourth channel wall 34, and thus increasing the area of ​​the second sound absorption cavity and the second sound absorption component 72, and improving the noise reduction effect.

[0080] In some examples, the impeller 500 extends axially in the left-right direction, the first channel wall 31 is the right side wall of the air outlet channel 30, the second channel wall 32 is the left side wall of the air outlet channel 30, the third channel wall 33 is the upper side wall of the air outlet channel 30, and the fourth channel wall 34 is the lower side wall of the air outlet channel 30. The left end of the fourth channel wall 34 is connected to the second channel wall 32, and the right end of the fourth channel wall 34 is connected to the first channel wall 31.

[0081] As the first surface 321 gradually moves away from the inner surface of the first channel wall 31 along the air outlet direction of the air outlet channel 30, the size of the fourth channel wall 34 in the left and right directions gradually increases in the air outlet direction of the air outlet channel 30, thereby increasing the surface area of ​​the fourth channel wall 34, increasing the area of ​​the second sound absorption cavity and the second sound absorption component 72, and improving the noise reduction effect.

[0082] In some examples, such as Figure 3As shown, the fourth channel wall 34 is provided with a plurality of spaced second ventilation openings 622. The second ventilation openings 622 connect the air outlet channel 30 and the second sound absorption cavity. Noise in the air outlet channel 30 can enter the second sound absorption cavity through the second ventilation openings 622. The second sound-absorbing component 72 of the second sound absorption cavity buffers the vibration in the air, thereby absorbing the sound in the air outlet channel 30 and performing noise reduction treatment on the air outlet channel 30, thereby reducing the noise transmitted from the outlet of the air outlet channel 30 and reducing the noise transmitted to the designated area.

[0083] In some specific embodiments of the present invention, such as Figure 4 As shown, the fourth channel wall 34 transitions smoothly with the side wall of the impeller cavity 10 through a rounded arc, so that the air in the impeller cavity 10 can smoothly enter the air outlet channel 30.

[0084] The following describes the fresh air module 1 of an air conditioner according to an embodiment of the present invention. The fresh air module 1 of the air conditioner according to an embodiment of the present invention includes a fan assembly and a filter 8 according to the above-described embodiments of the present invention.

[0085] The inlet of the air intake duct is a fresh air inlet. The filter element 8 is installed in the air intake duct to filter the noise entering the air intake duct, thereby ensuring the cleanliness of the air in the fan cavity and the air outlet duct 30, so as to guide the clean air to the designated area.

[0086] According to an embodiment of the present invention, the fresh air module 1 of the air conditioner utilizes the fan assembly according to the above embodiment of the present invention to gradually increase the size of the air outlet duct 30 in the axial direction of the impeller 500, so that when the air flows along the air outlet duct 30, the air can be fully diffused to release the airflow pressure and achieve a noise reduction effect.

[0087] In some embodiments, the impeller 500 is a centrifugal impeller 500, the fresh air inlet is located on one side of the impeller 500 along the axial direction, and the outlet of the air outlet duct 30 is the fresh air outlet 303. Driven by the impeller 500, air enters the air inlet duct from the fresh air inlet, is filtered by the filter element 8 in the air inlet duct, and then flows to the impeller cavity 10. The air in the impeller cavity 10 flows along the circumference of the impeller 500 to the air outlet duct 30, and then flows along the air outlet duct 30 from the fresh air outlet 303 to the designated area, so as to introduce fresh air into the designated area.

[0088] In some embodiments, the filter element 8 is removable and located in the air inlet channel to facilitate cleaning or replacement of the filter element 8.

[0089] An air conditioner according to an embodiment of the present invention is described below. The air conditioner according to an embodiment of the present invention includes a fan assembly or a fresh air module 1 according to the above-described embodiment of the air conditioner.

[0090] According to an embodiment of the present invention, the air conditioner utilizes a fan assembly or fresh air module 1 according to the above embodiment of the present invention to gradually increase the size of the air outlet duct 30 in the axial direction of the impeller 500, so that when the air flows along the air outlet duct 30, the air can be fully diffused to release the airflow pressure and achieve a noise reduction effect.

[0091] Other configurations and operations of the air conditioner according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0092] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and 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 of the invention. Furthermore, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more. In the description of this invention, "above" or "below" a second feature may include direct contact between the first and second features, or it may include contact between the first and second features not being in direct contact but through another feature between them.

[0093] In the description of this invention, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicating that the first feature is at a higher horizontal level than the second feature.

[0094] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0095] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. 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.

[0096] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A fan assembly, characterized in that, include: A volute, the volute defining an exhaust wheel cavity, an air inlet channel and an air outlet channel, the exhaust wheel cavity being connected between the air inlet channel and the air outlet channel; A wind turbine, which is rotatably disposed in the wind turbine cavity; The air outlet channel is located on the periphery of the impeller and has a first channel wall and a second channel wall that are disposed opposite to each other in the axial direction of the impeller. The inner surface of the second channel wall includes a first surface. The air outlet channel includes a first air outlet section, which is located between the first surface and the inner surface of the first channel wall. The first surface gradually moves away from the inner surface of the first channel wall along the air outlet direction of the air outlet channel, so that the size of the first air outlet section in the axial direction of the impeller gradually increases along the air outlet direction in the air outlet channel.

2. The wind turbine assembly according to claim 1, characterized in that, The first surface is a curved surface that gradually moves away from the inner surface of the first channel wall along the air outlet direction of the air outlet channel.

3. The wind turbine assembly according to claim 1, characterized in that, The air outlet channel is located above the impeller cavity, and the first surface gradually approaches the inner surface of the first channel wall from top to bottom.

4. The wind turbine assembly according to claim 1, characterized in that, The inner surface of the first channel wall is perpendicular to the axis of the wind turbine.

5. The wind turbine assembly according to claim 1, characterized in that, The dimension A of the end of the first air outlet section near the outlet of the air outlet channel in the axial direction of the wind turbine is denoted as A, and the dimension B of the end of the first air outlet section away from the outlet of the air outlet channel in the axial direction of the wind turbine is denoted as B, with A / B being 1.5-3.

6. The wind turbine assembly according to claim 1, characterized in that, The air outlet channel further includes a second air outlet section, which connects the impeller cavity and the first air outlet section. The inner surface of the second channel wall further includes a second surface, and the second air outlet section is located between the second surface and the inner surface of the first channel wall. Both the second surface and the inner surface of the first channel wall are perpendicular to the axis of the wind turbine.

7. The wind turbine assembly according to claim 6, characterized in that, The distance between the second surface and the inner surface of the first channel wall in the axial direction of the impeller is equal to the axial dimension of the end of the first air outlet section away from the outlet of the air outlet channel in the axial direction of the impeller, and the second surface and the first surface are connected by a circular arc transition.

8. The wind turbine assembly according to any one of claims 1-7, characterized in that, The volute is provided with a noise reduction structure, and at least a portion of the noise reduction structure corresponds to the position of the first air outlet section.

9. The wind turbine assembly according to claim 8, characterized in that, The noise reduction structure includes: A first cover is disposed on the outside of the first channel wall and defines a first sound-absorbing cavity between the cover and the first channel wall, the first sound-absorbing cavity being connected to the air outlet channel.

10. The wind turbine assembly according to claim 9, characterized in that, The first sound-absorbing cavity is provided with a first sound-absorbing element.

11. The wind turbine assembly according to any one of claims 1-7, characterized in that, The air outlet channel also has a third channel wall and a fourth channel wall. The third channel wall is disposed adjacent to the volute tongue of the volute and is connected between the first channel wall and the second channel wall. The fourth channel wall is disposed opposite to the third channel wall and is connected between the first channel wall and the second channel wall.

12. The wind turbine assembly according to claim 11, characterized in that, The distance between the inner surfaces of the third channel wall and the fourth channel wall gradually decreases at least partially along the air outlet direction of the air outlet channel.

13. The wind turbine assembly according to claim 11, characterized in that, The volute is provided with a noise reduction structure, and at least a portion of the noise reduction structure corresponds to the position of the first air outlet section.

14. The wind turbine assembly according to claim 13, characterized in that, The fourth channel wall and the outlet of the wind turbine cavity are arranged opposite to each other, and the noise reduction structure includes: The second cover is located on the outside of the fourth channel wall and defines a second sound-absorbing cavity between the second cover and the fourth channel wall. The second sound-absorbing cavity is connected to the air outlet channel.

15. The wind turbine assembly according to claim 14, characterized in that, The second sound-absorbing cavity is provided with a second sound-absorbing element.

16. A fresh air module for an air conditioner, characterized in that, include: A fan assembly, wherein the fan assembly is the fan assembly according to any one of claims 1-15, and the inlet of the air inlet channel is a fresh air inlet; A filter element is disposed within the air inlet channel.

17. An air conditioner, characterized in that, It includes the fan assembly according to any one of claims 1-15; or, it includes the fresh air module of the air conditioner according to claim 16.

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