Fan assembly, fresh air module of air conditioner and air conditioner

Abstract

The utility model discloses a fan assembly, a fresh air module of an air conditioner and the air conditioner, the fan assembly comprises a volute, the volute defines an air outlet wheel cavity, an air inlet channel and an air outlet channel, and the air wheel cavity is communicated between the air inlet channel and the air outlet channel; a wind wheel; the air outlet channel is located on the peripheral side of the wind wheel and provided with a first channel wall and a second channel wall, the inner surface of the second channel wall comprises a first surface, the air outlet channel comprises a first air outlet section, and the first air outlet section is located between the first surface and the inner surface of the first channel wall; the first surface is gradually away from the inner surface of the first channel wall in 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 wind wheel is gradually increased in the air outlet direction of air in the air outlet channel. According to the fan assembly provided by the embodiment of the utility model, the size of the air outlet channel in the axial direction of the wind wheel is gradually increased, so that when air flows along the air outlet channel, the air can be fully diffused so as to release airflow pressure, and the noise reduction effect is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to air conditioner technical field, specifically, relate to a new trend module, air conditioner of fan assembly and air conditioner. BACKGROUND

[0002] The fan in the related art is used for conveying air to a specified area, and the fan will generate noise when used, and excessive noise will affect the user experience. SUMMARY

[0003] The utility model discloses at least one of the technical problems in the prior art is solved, for this, the utility model provides a fan assembly, the fan assembly gradually increases the size of the air outlet channel in the axial direction of the fan wheel, when air flows along the air outlet channel, can fully expand the pressure of air, to release the airflow pressure, reach the effect of noise reduction.

[0004] The utility model discloses still provide a new trend module of air conditioner with the fan assembly.

[0005] The utility model discloses still provide a kind of air conditioner with the new trend module.

[0006] According to the fan assembly of the first aspect embodiment of the utility model, it comprises: volute, the volute defines fan wheel cavity, air inlet channel and air outlet channel, the fan wheel cavity is communicated between the air inlet channel and the air outlet channel;Fan wheel, the fan wheel is rotatably arranged in the fan wheel cavity;Wherein, the air outlet channel is located at the circumferential side of the fan wheel, and has the first channel wall and the second channel wall relatively arranged in the axial direction of the fan wheel, the inner surface of the second channel wall includes first surface, the air outlet channel includes first air outlet section, the first air outlet section 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 fan wheel gradually increases along the air outlet direction of air in the air outlet channel.

[0007] According to the fan assembly of the embodiment of the utility model, the size of the air outlet channel in the axial direction of the fan wheel is gradually increased, so that when air flows along the air outlet channel, the air can be fully expanded, to release the airflow pressure, achieve the effect of noise reduction.

[0008] In addition, the fan assembly according to the above embodiment of the utility model can also have the following additional technical features:

[0009] According to some embodiments of the utility model, the first surface is a curved surface gradually moving 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 application, the air outlet channel is located above the air wheel 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 application, the inner surface of the first channel wall is perpendicular to the axis of the air wheel.

[0012] According to some embodiments of the present application, the dimension of the one end of the first air outlet section close to the outlet of the air outlet channel in the axial direction of the air wheel is A, the dimension of the one end of the first air outlet section away from the outlet of the air outlet channel in the axial direction of the air wheel is B, and A / B is 1.5-3.

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

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

[0015] According to some embodiments of the present application, the volute 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.

[0016] According to some optional embodiments of the present application, the noise reduction structure comprises a first cover body, which is arranged on the outer side of the first channel wall and defines a first sound absorption cavity with the first channel wall, and the first sound absorption cavity is communicated with the air outlet channel.

[0017] According to some specific embodiments of the present application, a first sound absorption member is arranged in the first sound absorption cavity.

[0018] According to some embodiments of the present application, the air outlet channel further comprises a third channel wall and a fourth channel wall, the third channel wall is arranged 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 is arranged opposite to the third channel wall and connected between the first channel wall and the second channel wall.

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

[0020] According to some optional embodiments of the present application, the volute 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.

[0021] According to some specific embodiments of the present application, the fourth passage wall and the outlet of the impeller cavity are oppositely arranged, and the noise reduction structure comprises: a second cover body, which is arranged outside the fourth passage wall and defines a second sound absorption cavity with the fourth passage wall, and the second sound absorption cavity is in communication with the air outlet passage.

[0022] In some embodiments, a second sound absorption member is arranged in the second sound absorption cavity.

[0023] According to the second aspect of the present application, a fresh air module of an air conditioner is provided, which comprises the fan assembly according to the first aspect of the present application, and the inlet of the air inlet passage is a fresh air inlet.

[0024] According to the fresh air module of the air conditioner of the present application, by using the fan assembly according to the first aspect of the present application, the size of the air outlet passage in the axial direction of the impeller is gradually increased, so that the air can be fully expanded when flowing along the air outlet passage, so as to release the air flow pressure and achieve the noise reduction effect.

[0025] According to the third aspect of the present application, an air conditioner is provided, which comprises the fan assembly according to the first aspect of the present application, or the fresh air module of the air conditioner according to the second aspect of the present application.

[0026] According to the air conditioner of the present application, by using the fan assembly according to the first aspect of the present application, or using the fresh air module of the air conditioner according to the second aspect of the present application, the size of the air outlet passage in the axial direction of the impeller is gradually increased, so that the air can be fully expanded when flowing along the air outlet passage, so as to release the air flow pressure and achieve the noise reduction effect.

[0027] Additional aspects and advantages of the present application will be given in part in the following description, and will become apparent from the following description, or will be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0028] The above and / or additional aspects and advantages of the present utility model will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the references to the following drawings, of which:

[0029] Figure 1 is a structural schematic view of a fan assembly according to an embodiment of the present utility model;

[0030] Figure 2 is a top view of a fan assembly according to an embodiment of the present utility model;

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

[0032] Figure 4 is Figure 3 a sectional view at A-A in FIG.

[0033] Figure 5 is Figure 3 a sectional view at B-B in FIG.

[0034] Figure 6 is a side view of a fan assembly according to an embodiment of the present utility model.

[0035] Reference signs: 1, fresh air module;

[0036] 100, volute;10, impeller cavity;

[0037] 30, air outlet passage;301, first air outlet section;302, second air outlet section;303, fresh air outlet;31, first passage wall;32, second passage wall;321, first surface;322, second surface;33, third passage wall;34, fourth passage wall;

[0038] 500, impeller;

[0039] 61, first cover;612, first vent;62, second cover;622, second vent;

[0040] 71, first sound absorbing member;72, second sound absorbing member;

[0041] 8, filter member. DETAILED DESCRIPTION

[0042] Embodiments of the present utility model are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the present utility model, and cannot be understood as limiting the present utility model.

[0043] A fan assembly according to an embodiment of the present utility model is described below with reference to the accompanying drawings.

[0044] As Figures 1-6 shown, the fan assembly according to the embodiments of the present application comprises a volute 100 and a wind wheel 500.

[0045] The volute 100 defines a wind wheel cavity 10, an air inlet channel and an air outlet channel 30, the wind wheel cavity 10 is communicated between the air inlet channel and the air outlet channel 30, and the wind wheel 500 is rotatably arranged in the wind wheel cavity 10. When the wind wheel 500 rotates, external air can be driven to enter the air inlet channel, flow to the wind wheel cavity 10 along the air inlet channel, and then enter the air outlet channel 30, and flow to a designated area along the air outlet channel 30.

[0046] The air outlet channel 30 is located at the circumferential side of the wind wheel 500, and the air outlet channel 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 oppositely arranged in the axial direction of the wind wheel 500. The inner surface of the second channel wall 32 comprises a first surface 321, and the air outlet channel 30 comprises a first air outlet section 301 located between the first surface 321 and the inner surface of the first channel wall 31.

[0047] The first surface 321 gradually moves away from the inner surface of the first channel wall 31 in the air outlet direction of the air outlet channel 30. In this way, 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 wind wheel 500 gradually increases, so as to gradually increase the size of the first air outlet section 301 in the axial direction of the wind wheel 500. In this way, when air flows along the air outlet channel 30 to the designated area, the air can be fully expanded to release the airflow pressure, thereby achieving the noise reduction effect.

[0048] Therefore, according to the fan assembly of the embodiments of the present application, by gradually increasing the size of the air outlet channel 30 in the axial direction of the wind wheel 500, when air flows along the air outlet channel 30, the air can be fully expanded to release the airflow pressure, thereby achieving the noise reduction effect.

[0049] The fan assembly according to the embodiments of the present application will be described below with reference to the accompanying drawings.

[0050] In some embodiments of the present application, as Figures 1-6 shown, the fan assembly comprises a volute 100 and a wind wheel 500.

[0051] In some embodiments of the present application, as Figure 5 shown, the first surface 321 is a curved surface gradually moving away from the inner surface of the first channel wall 31 in the air outlet direction of the air outlet channel 30. In this way, when air flows along the air outlet channel 30, the air can smoothly flow along the first surface 321 to the outlet of the air outlet channel 30, thereby expanding the air to release the airflow pressure, thereby achieving 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 this utility model, 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 direction from bottom to top, 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 this utility model, 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 regular-shaped volute 100.

[0060] In some embodiments of this utility model, such as Figure 5As shown, the dimension of the first air outlet section 301 at the end close to the outlet of the air outlet channel 30 in the axial direction of the wind wheel 500 is A, and the dimension of the first air outlet section 301 at the end away from the outlet of the air outlet channel 30 in the axial direction of the wind wheel 500 is B, and A / B is 1.5-3, so as to control the increasing range of the dimension of the air outlet channel 30 in the axial direction of the wind wheel 500, and then better expand the pressure of the air, so as to reduce the noise.

[0061] In some embodiments of the utility model, as shown in Figure 5 As shown, the air outlet channel 30 further comprises a second air outlet section 302, which is communicated between the wind wheel cavity 10 and the first air outlet section 301, wherein the inner surface of the second channel wall 32 further comprises 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, and the second surface 322 and the inner surface of the first channel wall 31 are both perpendicular to the axis of the wind wheel 500, so that when the air in the wind wheel cavity 10 just enters the air outlet channel 30, the air first enters the second air outlet section 302, and then flows to the first air outlet section 301.

[0062] Specifically, when the air flows from the wind wheel cavity 10 to the air outlet channel 30, the flow direction of the air changes, and if the air directly enters the first air outlet section 301, the air is prone to turbulence after directly entering the first air outlet section 301 due to the change in the size of the first air outlet section 301, so the air first enters the second air outlet section 302, and then flows to the first air outlet section 301 after having a stable flow direction in the second air outlet section 302, so as to reduce the turbulence of the air in the air outlet channel 30, and then reduce the noise.

[0063] In some optional embodiments of the utility model, the distance between the second surface 322 and the inner surface of the first channel wall 31 in the axial direction of the wind wheel 500 is equal to the dimension of the first air outlet section 301 at the end away from the outlet of the air outlet channel 30 in the axial direction of the wind wheel 500, and the second surface 322 and the first surface 321 are connected in a circular arc transition, so as to avoid the air gathering at the connection between 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 utility model, 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 the noise in the air outlet channel 30 can be reduced by using the noise reduction structure when the air flows along the first air outlet section 301, thereby reducing the noise transmitted to the external environment.

[0065] In some optional embodiments of the utility model, as shown in Figure 1 , Figure 5As shown, the noise reduction structure comprises a first cover body 61, which is arranged outside the first channel wall 31 and defines a first sound absorption cavity with the first channel wall 31, the first sound absorption cavity is communicated with the air outlet channel 30, and the noise in the air outlet channel 30 can enter the first sound absorption cavity to consume the energy in the sound and reduce the noise.

[0066] In some embodiments of the utility model, as shown in Figure 5 As shown, the first sound absorption cavity is provided with a first sound absorption piece 71, the vibration in the air outlet channel 30 can enter the first sound absorption cavity, the first sound absorption piece 71 of the first sound absorption cavity can buffer the vibration in the air, thereby absorbing the sound in the air outlet channel 30, the noise reduction treatment is carried out 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.

[0067] In some embodiments, as shown in Figure 4 As shown, the first channel wall 31 is provided with a plurality of first air vents 612 arranged at intervals, the noise in the air outlet channel 30 can enter the first sound absorption cavity through the first air vent 612, the vibration in the air is buffered by the first sound absorption piece 71 of the first sound absorption cavity, thereby absorbing the noise in the air outlet channel 30, the noise reduction treatment is carried out 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.

[0068] In some embodiments of the utility model, as shown in Figure 4 As shown, the air outlet channel 30 further 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, so as to surround the air outlet channel 30, so that the air can flow to the designated area along the air outlet channel 30.

[0069] In some optional embodiments of the utility model, 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 that the speed of the air suddenly increases or suddenly decreases when the air flows along the air outlet channel 30, thereby facilitating to ensure the uniform flow of the air and reduce the generation of noise.

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

[0071] In some embodiments, as shown in Figure 4 、 Figure 5 The axial direction of the wind wheel 500 extends along 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 rear-to-front direction (it should be understood that the above direction is defined only for the purpose of describing the drawings, and does not limit the actual position and direction of the fan assembly).

[0072] In the rear-to-front direction, the distance between the inner surface of the first channel wall 31 and the first surface 321 gradually increases, and 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 cross-sectional variation trend of the air outlet channel 30 is relatively gentle, so as to avoid the sudden increase or sudden decrease of the air speed when the air flows along the air outlet channel 30, thereby facilitating the uniform flow of the air and reducing the generation of noise.

[0073] In some optional embodiments of the present application, 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, and further reduce 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 channel 30, and the first air outlet section 301 is arranged close to the outlet of the air outlet channel 30. By reducing the noise of the first air outlet section 301, the noise transmitted from the outlet of the air outlet channel 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 application, the fourth channel wall 34 and the outlet of the wind wheel cavity 10 are oppositely arranged, the noise reduction structure comprises a second cover body 62, the second cover body 62 is arranged on the outer side of the fourth channel wall 34, and a second sound absorption cavity is defined between the second cover body 62 and the fourth channel wall 34, the second sound absorption cavity is communicated with the air outlet channel 30, so as to reduce the noise in the air outlet channel 30 by using the second sound absorption cavity.

[0076] Specifically, the fourth channel wall 34 is arranged opposite to the outlet of the wind wheel cavity 10, and the air flow in the wind wheel cavity 10 has an impact force on the fourth channel wall 34 when flowing into the outlet air channel 30, causing the air pressure at the fourth channel wall 34 to be larger, which is easy to produce noise. The second cover body 62 is arranged outside the fourth channel wall 34 to form a second sound absorption cavity outside the fourth channel wall 34, so that the noise is conveniently introduced into the second sound absorption cavity, thereby reducing the impact of the air flow on the fourth channel wall 34 to reduce the air flow noise.

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

[0078] In some embodiments, as shown in Figure 4 The second sound absorption member 72 is arranged in the second sound absorption cavity, and the vibration in the outlet air channel 30 can enter the second sound absorption cavity. The second sound absorption member 72 of the second sound absorption cavity can buffer the vibration in the air, thereby absorbing the sound in the outlet air channel 30, reducing the noise from the outlet of the outlet air channel 30, and reducing the noise transmitted 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 outlet air channel 30, so that the size of the first outlet section 301 in the axial direction of the wind wheel 500 gradually increases along the air outlet direction of the air in the outlet air channel 30. In this way, the size of the fourth channel wall 34 in the axial direction of the wind wheel 500 gradually increases, thereby increasing the surface area of the fourth channel wall 34, and further increasing the area of the second sound absorption cavity and the second sound absorption member 72, and improving the noise reduction effect.

[0080] In some examples, the axial direction of the wind wheel 500 extends in the left-right direction, the first channel wall 31 is the right side wall of the outlet air channel 30, the second channel wall 32 is the left side wall of the outlet air channel 30, the third channel wall 33 is the upper side wall of the outlet air channel 30, and the fourth channel wall 34 is the lower side wall of the outlet air 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] Since the first surface 321 gradually moves away from the inner surface of the first channel wall 31 along the air outlet direction of the outlet air channel 30, the size of the fourth channel wall 34 in the left-right direction gradually increases in the air outlet direction of the outlet air 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 member 72, and improving the noise reduction effect.

[0082] In some examples, as shown in Figure 3As shown, the fourth channel wall 34 is provided with a plurality of second air vents 622 arranged at intervals, the second air vents 622 being communicated between the air outlet channel 30 and the second sound absorption cavity, and the noise in the air outlet channel 30 can enter the second sound absorption cavity through the second air vents 622, so that the vibration in the air is buffered by the second sound absorption member 72 of the second sound absorption cavity, thereby absorbing the sound in the air outlet channel 30, reducing the noise of the air outlet channel 30, and reducing the noise transmitted to the designated area.

[0083] In some embodiments of the present application, as shown in Figure 4 As shown, the fourth channel wall 34 and the side wall of the impeller cavity 10 are circularly transitioned, so that the air in the impeller cavity 10 can smoothly enter the air outlet channel 30.

[0084] The fresh air module 1 of the air conditioner according to the embodiments of the present application is described below. The fresh air module 1 of the air conditioner according to the embodiments of the present application comprises the fan assembly and the filter member 8 according to the above embodiments of the present application.

[0085] The inlet of the air inlet channel is a fresh air inlet, and the filter member 8 is arranged in the air inlet channel to filter the noise entering the air inlet channel, thereby ensuring the cleanliness of the air in the fan cavity and the air outlet channel 30, and guiding the clean air to the designated area.

[0086] The fresh air module 1 of the air conditioner according to the embodiments of the present application gradually increases the size of the air outlet channel 30 in the axial direction of the impeller 500 by using the fan assembly according to the above embodiments of the present application, so that the air can be fully expanded when flowing along the air outlet channel 30 to release the air flow pressure and achieve the noise reduction effect.

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

[0088] In some embodiments, the filter member 8 is arranged in the air inlet channel and can be pulled out, so as to facilitate cleaning or replacement of the filter member 8.

[0089] The air conditioner according to the embodiments of the present application is described below. The air conditioner according to the embodiments of the present application comprises the fan assembly or the fresh air module 1 of the air conditioner according to the above embodiments of the present application.

[0090] According to the air conditioner of the embodiment of the present application, by using the fan assembly or the fresh air module 1 according to the above embodiment of the present application, by gradually increasing the size of the air outlet channel 30 in the axial direction of the fan wheel 500, the air can be fully expanded when flowing along the air outlet channel 30, so as to release the airflow pressure, and the noise reduction effect is achieved.

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

[0092] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the features limited as "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, "a plurality of" means two or more. In the description of the present application, the first feature "above" or "below" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature therebetween.

[0093] In the description of the present application, the first feature "above", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature.

[0094] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0095] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0096] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made thereto without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A fan assembly comprising: The application relates to a centrifugal fan, comprising: a volute which defines a wind wheel cavity, an air inlet channel and an air outlet channel, the wind wheel cavity being communicated between the air inlet channel and the air outlet channel; a wind wheel which is rotatably arranged in the wind wheel cavity; wherein the air outlet channel is located at the circumferential side of the wind wheel and has a first channel wall and a second channel wall which are oppositely arranged in the axial direction of the wind wheel, the inner surface of the second channel wall comprises a first surface, the air outlet channel comprises 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 wind wheel gradually increases along the air outlet direction of air in the air outlet channel.

2. The fan assembly of claim 1, wherein, The first surface is a curved surface which gradually moves away from the inner surface of the first channel wall along the air outlet direction of the air outlet channel.

3. The fan assembly of claim 1, wherein, The air outlet channel is located above the wind wheel cavity, and the first surface gradually approaches the inner surface of the first channel wall from top to bottom.

4. The fan assembly of claim 1, wherein, The inner surface of the first channel wall is perpendicular to the axis of the wind wheel.

5. The fan assembly of claim 1, wherein, The size of one end of the first air outlet section which is close to the outlet of the air outlet channel in the axial direction of the wind wheel is A, the size of the other end of the first air outlet section which is away from the outlet of the air outlet channel in the axial direction of the wind wheel is B, and A / B is 1.5-3.

6. The fan assembly of claim 1, wherein, The air outlet channel further comprises a second air outlet section which is communicated between the wind wheel cavity and the first air outlet section; wherein the inner surface of the second channel wall further comprises a second surface, the second air outlet section is located between the second surface and the inner surface of the first channel wall, and the second surface and the inner surface of the first channel wall are both perpendicular to the axis of the wind wheel.

7. The fan assembly of claim 6, wherein, The distance between the second surface and the inner surface of the first channel wall in the axial direction of the wind wheel is equal to the size of the other end of the first air outlet section which is away from the outlet of the air outlet channel in the axial direction of the wind wheel, and the second surface and the first surface are circularly arc transitionally connected.

8. The fan assembly of any one of claims 1-7, wherein, The volute 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.

9. The fan assembly of claim 8, wherein, The noise reduction structure comprises: a first cover body which is arranged outside the first channel wall and defines a first sound absorption cavity with the first channel wall, the first sound absorption cavity being communicated with the air outlet channel.

10. The fan assembly of claim 9, wherein, A first sound absorption piece is arranged in the first sound absorption cavity.

11. The fan assembly of any one of claims 1-7, wherein, The air outlet channel further has a third channel wall and a fourth channel wall, the third channel wall is arranged adjacent to the volute tongue of the volute and is connected between the first channel wall and the second channel wall, and the fourth channel wall is oppositely arranged with the third channel wall and is connected between the first channel wall and the second channel wall.

12. The fan assembly of claim 11, wherein, 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.

13. The fan assembly of claim 11, wherein, The volute 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.

14. The fan assembly of claim 13, wherein, The fourth channel wall is oppositely arranged with the outlet of the wind wheel cavity, and the noise reduction structure comprises: A second cover body is arranged outside the fourth passage wall and defines a second sound absorption cavity with the fourth passage wall, the second sound absorption cavity being in communication with the air outlet passage.

15. The fan assembly of claim 14, wherein, A second sound absorption member is arranged in the second sound absorption cavity.

16. A fresh air module for an air conditioner, comprising: The air conditioner comprises: The air fan assembly is the air fan assembly according to any one of claims 1-15, and the air inlet of the air inlet passage is a fresh air inlet. A filter member is arranged in the air inlet passage.

17. An air conditioner characterized by comprising: The air conditioner comprises the air fan assembly according to any one of claims 1-15 or the fresh air module of the air conditioner according to claim 16.

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