Air supply assembly, air conditioner outdoor unit and air conditioner

Abstract

This invention provides an air supply assembly, an outdoor air conditioning unit, and an air conditioner. The air supply assembly includes: a fan wheel with at least one blade, the blade having a trailing edge and an outer edge, the outer edge being located on the side opposite to the rotation axis of the fan wheel, the trailing edge being connected to the outer edge, the trailing edge being oriented opposite to the rotation direction of the fan wheel, and a turbulence-inducing structure on the trailing edge; and a flow guide with a flow channel fitted around the outside of the fan wheel, at least a portion of the inner wall of the flow guide being cylindrical and having a predetermined gap between it and the outer edge of the blade, wherein at least a large portion of the turbulence-inducing structure is housed within the cylindrical portion of the flow guide. The turbulence-inducing structure can disturb the vortices formed on the blade, dispersing the energy of the vortices, and the predetermined gap between the outer edge of the blade and the cylindrical flow guide prevents the vortex from detaching from the blade, thereby reducing the possibility of aerodynamic noise.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, specifically to an air supply assembly, an outdoor unit for an air conditioner, and an air conditioner. Background Technology

[0002] This section provides only background information relevant to this disclosure and is not necessarily prior art.

[0003] In air conditioning systems, aerodynamic noise is one of the main noise sources during operation. When airflow passes over the surface of the fan blades in an air conditioning system, eddies are generated. Eddies are prone to detach at the trailing edge of the fan blades. After eddy detachment, large pulsations are often caused. The periodic eddy detachment causes the airflow force acting on the object to change accordingly, generating fan blade eddy noise. Summary of the Invention

[0004] The objective of this invention is to at least solve the technical problem of fan blade vortex noise easily generated in air conditioning systems. This objective is achieved through the following technical solution:

[0005] A first aspect of the present invention provides an air supply assembly, the air supply assembly comprising:

[0006] A wind turbine has at least one blade, the blade having a trailing edge and an outer edge, the outer edge being located on the side of the blade opposite to the rotation axis of the wind turbine, the trailing edge being connected to the outer edge, the trailing edge being oriented opposite to the rotation direction of the wind turbine, and a turbulence structure being provided on the trailing edge.

[0007] A flow guide has a flow guide channel sleeved on the outside of the wind turbine. At least a portion of the inner wall of the flow guide channel is cylindrical and has a preset gap with the outer edge of the fan blade. The preset gap is used to restrict the airflow formed on the fan blade from moving in the radial direction of the flow guide channel. At least a large portion of the turbulence structure is housed within the cylindrical portion of the flow guide channel.

[0008] The air supply assembly provided by the present invention can disturb the vortex formed on the fan blade by setting a turbulence structure at the trailing edge of the fan blade, disperse the energy of the vortex, and set a preset gap between the outer edge of the fan blade and the straight cylindrical guide channel to prevent the vortex from detaching from the fan blade, thereby reducing the possibility of vortex noise.

[0009] In addition, the air supply assembly according to the present invention may also have the following additional technical features:

[0010] In some embodiments of the present invention, the turbulence structure includes a plurality of recesses and a plurality of protrusions, the recesses and the protrusions being alternately arranged along the extending direction of the trailing edge of the fan blade.

[0011] In some embodiments of the present invention, the recesses and the protrusions have a height difference in the direction of the rotation axis of the wind turbine, wherein all of the plurality of recesses are housed within the cylindrical portion of the flow guide channel.

[0012] In some embodiments of the present invention, the turbulence structure is arranged in a sawtooth shape.

[0013] In some embodiments of the present invention, the size of the turbulence structure along the rotation axis of the wind turbine is L1, and the length of the turbulence structure housed in the cylindrical portion of the guide channel is L2, wherein L2 / L1 is greater than 0.8.

[0014] In some embodiments of the present invention, the fan blade has a first end and a second end along the rotation axis of the wind turbine;

[0015] The first end is located at the edge region of one end of the cylindrical flow channel, and the second end is located at the edge region of the other end of the cylindrical flow channel.

[0016] In some embodiments of the present invention, the preset gap is any value between 5 mm and 15 mm.

[0017] In some embodiments of the present invention, the flow channel includes an inlet section, an outlet section, and an intermediate section. The intermediate section is located between the inlet section and the outlet section. The intermediate section is cylindrical. Along the direction from the inlet section to the outlet section, the inner diameter of the outlet section gradually increases, and along the direction from the inlet section to the outlet section, the inner diameter of the inlet section gradually decreases.

[0018] In some embodiments of the present invention, the outlet section is provided with a first noise reduction structure, and most of the sawtooth-shaped turbulence structure is housed in the middle section.

[0019] In some embodiments of the present invention, the inlet section is provided with a second noise reduction structure.

[0020] In some embodiments of the present invention, the outer wall of the flow guide is provided with reinforcing ribs.

[0021] In some embodiments of the present invention, the outer wall of the flow guide includes a plurality of transverse ribs and a plurality of longitudinal ribs. The plurality of transverse ribs are spaced apart along the rotation axis of the wind turbine, and the plurality of longitudinal ribs are spaced apart along the circumferential direction of the flow guide. The transverse ribs and the longitudinal ribs are intersectingly arranged on the outer wall of the flow guide.

[0022] A second aspect of the present invention also provides an outdoor unit for an air conditioner, the outdoor unit comprising:

[0023] A first housing, the first housing having a first air outlet and a first air inlet, the first air outlet being located at the top of the housing;

[0024] The air supply assembly as described in any of the preceding claims is disposed within the first housing and has an air outlet, which is disposed opposite to the first air outlet.

[0025] In some embodiments of the present invention, the outdoor unit of the air conditioner further includes a heat exchanger assembly disposed below the first housing, the heat exchanger assembly forming a heat exchange air duct, and the heat exchange air duct being connected to the first air inlet.

[0026] In some embodiments of the present invention, the outdoor unit of the air conditioner further includes:

[0027] The second housing, wherein the heat exchanger assembly is disposed on the side wall of the second housing;

[0028] An electrical control box is located on the side wall of the second housing, and the heat exchanger and the electrical control box together form the heat exchange duct.

[0029] In some embodiments of the present invention, the outdoor unit of the air conditioner further includes:

[0030] A mesh cover is provided at the first air outlet of the first housing, and the mesh cover has a grid structure, which is arranged opposite to the impeller.

[0031] The air supply assembly also includes a drive assembly, which is connected to the grille structure, and the drive shaft of the drive assembly is connected to the impeller.

[0032] A third aspect of the present invention also provides an air conditioner comprising an outdoor unit as described in any of the preceding claims. Attached Figure Description

[0033] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0034] Figure 1 This is a schematic diagram of the structure of an air supply assembly according to an embodiment of the present invention;

[0035] Figure 2 for Figure 1 Enlarged view of B;

[0036] Figure 3 This is a schematic diagram of the structure of an air supply assembly according to an embodiment of the present invention;

[0037] Figure 4 for Figure 3 DD section view;

[0038] Figure 5 This is a schematic diagram of the air guide component of an air supply assembly according to an embodiment of the present invention;

[0039] Figure 6 for Figure 5 CC-direction sectional view;

[0040] Figure 7 This is a perspective view of the air guide component of an air supply assembly according to an embodiment of the present invention;

[0041] Figure 8 This is a schematic diagram of the air supply assembly of an air conditioner outdoor unit according to an embodiment of the present invention;

[0042] Figure 9 This is a schematic diagram of the structure of an outdoor air conditioner unit according to an embodiment of the present invention;

[0043] Figure 10 This is a schematic diagram of the structure of the first housing of an outdoor air conditioner unit according to an embodiment of the present invention;

[0044] Figure 11 This is a schematic diagram of the structure of the second housing of an air conditioner outdoor unit according to an embodiment of the present invention;

[0045] Figure 12 This is a partial structural diagram of an outdoor air conditioner unit according to an embodiment of the present invention, showing the internal structure of the outdoor air conditioner unit.

[0046] The attached figures are labeled as follows:

[0047] 100. Air supply components;

[0048] 110. Wind turbine; 111. Fan blade; 112. Trailing edge of fan blade; 113. Turbation structure; 1131. Recess; 1132. Convex; 114. Outer edge of fan blade; 115. First end; 116. Second end; A. Direction of rotation;

[0049] 120. Flow guide; 121. Flow guide channel; 122. Inlet section; 123. Outlet section; 124. Intermediate section; 125. Preset gap; 126. Transverse rib; 127. Longitudinal rib;

[0050] 150. Driver components;

[0051] 130. First noise reduction structure; 140. Second noise reduction structure;

[0052] 200. Air conditioner outdoor unit;

[0053] 210. First housing; 211. First air outlet; 212. First air inlet;

[0054] 220. Heat exchanger assembly; 221. Heat exchange duct; 222. Opening structure;

[0055] 230. Second housing; 231. Second air inlet;

[0056] 240. Electrical control box;

[0057] 250. Mesh cover; 251. Grid structure. Detailed Implementation

[0058] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0059] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0060] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0061] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "over," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure is flipped, an element described as "below other elements or features" or "below other elements or features" would subsequently be oriented as "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0062] This application provides an air supply assembly 100, which is suitable for HVAC equipment such as air conditioners, and especially suitable for outdoor units of HVAC equipment. The air supply assembly 100 includes a fan wheel 110 and a guide member 120, wherein the guide member 120 has a guide channel 121, the guide channel 121 includes an inlet section 122, an outlet end and an intermediate section 124, the intermediate section 124 is located between the inlet section 122 and the outlet section 123, the intermediate section 124 is used to cooperate with the fan blades 111 of the fan wheel 110 to guide the air and prevent the airflow on the fan blades 111 from generating noise.

[0063] The guide channel 121 of the guide component 120 is sleeved on the outside of the impeller 110. At least part of the inner wall surface of the guide channel 121 has a preset gap 125 between it and the outer edge 114 of the impeller 110. The purpose of setting the preset gap 125 is to prevent the vortex from detaching from the fan blade 111. Within the narrow space of the preset gap 125, the vortex cannot detach from the fan blade 111, causing air pressure to pulsate, thereby preventing the formation of vortex noise.

[0064] The preset gap 125 can be set to any value between 5mm and 15mm, making the structure between the guide component 120 and the impeller 110 more compact, while also satisfying the guiding effect of the guide channel 121 of the guide component 120 on the impeller 110.

[0065] The air supply assembly 100 of this application has at least one fan blade 111 in its impeller 110. Along the rotation direction A of the impeller 110, the fan blade 111 forms a trailing edge 112 at its rear edge. A turbulence structure 113 is provided at the trailing edge 112. At least most of the turbulence structure 113 is housed in a straight cylindrical guide channel 121. The turbulence structure 113 in the trailing edge 112 region of the fan blade can prevent the airflow from forming vortices in the trailing edge 112 region of the fan blade. The turbulence structure 113 can also be set to a structure that can disperse large-scale vortices, thereby dispersing the energy of the formed vortices and reducing the aerodynamic noise generated when the impeller 110 rotates.

[0066] In one embodiment of this application, the turbulence structure 113 can be configured as having a concave portion 1131 and a convex portion 1132. By providing the concave portion 1131 and the convex portion 1132 in the trailing edge 112 region of the fan blade, large-scale low-frequency vortices can be cut into small-scale high-frequency vortices, so that the sound wave energy is scattered rapidly, thereby reducing broadband noise and thus reducing the aerodynamic noise when the axial flow fan blade rotates.

[0067] Regarding the aerodynamic vortex noise involved in this application, it should be understood as follows: Under normal circumstances, when airflow passes over an obstacle, due to the viscous friction of air molecules, the airflow with a certain velocity interacts with the relatively stationary gas behind the obstacle, forming an airflow with vortices in the downstream area of ​​the obstacle. These vortices are constantly forming and falling off. The pressure at the center of each vortex is lower than the pressure of the surrounding medium. Whenever a vortex falls off, the turbulent airflow experiences a pressure jump. These pressure jumps propagate outward through the surrounding medium and act on the obstacle. When the pressure pulsations in the turbulent airflow contain audible sound frequency components and the intensity is sufficiently large, noise is radiated, which is called vortex noise or turbulent noise.

[0068] The air supply assembly 100 of this application embodiment houses most of the turbulence structure 113 of the trailing edge 112 of the fan blade within a straight cylindrical guide channel 121. A preset gap 125 is provided between the outer edge 114 of the fan blade 111 and the inner wall of the straight cylindrical guide channel 121. On the one hand, the turbulence structure 113 can disperse the eddies that have been formed. On the other hand, the preset gap 125 can prevent the eddies from falling off, thereby reducing the possibility of aerodynamic noise.

[0069] In one embodiment of this application, a cylindrical guide channel 121 can be disposed in the middle section 124 of the guide member 120. The cylindrical shape means that the inner wall surface of the guide channel 121 is smooth along the axial direction of the guide channel 121, and the inner diameter of this section of the guide channel 121 is consistent. It can also be called a "straight section". The middle section 124 can be completely disposed as a cylindrical guide channel 121. One end of the middle section 124 is provided with an inlet section 122, and the other end of the middle section 124 is provided with an outlet section 123. Alternatively, a portion of the axial section of the middle section 124 can be disposed as a cylindrical shape.

[0070] The air supply assembly 100 of this application embodiment can accommodate most of the turbulence structure 113 of the fan blade 111 within the straight cylindrical guide channel 121. The straight cylindrical inner wall of the middle section 124 guides the diffusion of airflow, and within the preset gap 125, the formation of noise can be greatly reduced.

[0071] It should be noted that, for the airflow noise of the impeller 110, the shedding of eddies at the trailing edge of the blade 111 is an important factor in the noise generated by the fan. Periodic eddy shedding will lead to a change in the corresponding circulation. Circulation refers to the volume occupied by fluid through a closed path within a specified time.

[0072] In some embodiments of this application, the turbulence structure 113 of the trailing edge 112 of the fan blade includes a plurality of recesses 1131 and a plurality of protrusions 1132, which are alternately arranged, and all the plurality of recesses 1131 are housed within a cylindrical guide channel 121. In this embodiment, the alternating recesses 1131 and protrusions 1132 can better disperse the formed vortices. The protrusions 1132 and recesses 1131 can extend outward along the trailing edge 112 of the fan blade, or they can extend along the arcuate fan surface of the fan blade 111. The recesses 1131 and protrusions 1132 should be smoothly connected to the fan blade 111, which is beneficial to the flow of air on the surface of the fan blade 111.

[0073] In this embodiment, all the recesses 1131 are housed within the cylindrical guide channel 121. The purpose is to ensure that when the vortex passes through the recesses 1131, it can enter the preset gap 125 between the outer edge 114 of the fan blade and the inner wall of the guide member 120. Under the guidance of the guide member 120, it flows towards the outlet direction of the air supply assembly 100. Since the outlet section 123 of the guide member 120 is connected to the middle section 124, the recesses 1131 are confined within the cylindrical guide section, which can prevent the vortex from entering the outlet section 123. In particular, when the outlet section 123 of the guide member 120 is set in a funnel shape, it is easy to cause airflow fluctuations, thereby generating aerodynamic noise.

[0074] More specifically, the recesses 1131 and protrusions 1132 can be wave-like structures formed on the trailing edge 112 of the fan blade. In order to make the airflow smoother and improve the airflow efficiency, the turbulence structure 113 is extended outward along the arcuate surface of the fan blade 111. The extension direction is consistent with the airflow direction on the surface of the fan blade 111 when the impeller 110 rotates. Furthermore, under the disturbance of the alternately arranged recesses 1131 and protrusions 1132, the energy of the vortex is dispersed. All the recesses 1131 are housed in the middle section 124 of the guide member 120, which can limit the airflow passing through the recesses 1131 within the guide channel 121 with a straight inner wall, preventing the airflow fluctuation from generating noise.

[0075] In this embodiment, the inner wall of the middle section 124 of the guide member 120 can be set as a straight cylinder, and the inner wall surface and the outer edge 114 of the impeller 110 or the outer edge 114 of the fan blade can be set as a predetermined gap, which can limit the airflow on the fan blade 111 from generating large fluctuations after passing through the turbulence structure 113; the inner diameter of the middle section 124 is consistent, which prevents the airflow from generating fluctuations in the radial direction and reduces noise.

[0076] In some embodiments of this application, a plurality of adjacent recesses 1131 and protrusions 1132 are serrated and formed along the edge of the fan blade 111 at the trailing edge 112 of the fan blade. In this embodiment, the turbulence structure 113 at the trailing edge 112 of the fan blade is serrated by the staggered recesses 1131 and protrusions 1132, with the tooth tips pointing along the extension of the fan surface and consistent with the flow direction of the airflow, so as to improve the flow efficiency of the airflow. The serrated turbulence structure 113 can also be arranged radially along the impeller 110, which can increase the area of ​​the guide structure at the trailing edge 112 of the fan blade, thereby increasing the contact area between the turbulence structure 113 and the airflow and reducing the detachment of eddies on the surface of the fan blade 111.

[0077] The air supply assembly 100 of the embodiments of this application improves the wake flow by setting a sawtooth structure at the trailing edge of the fan blade 111, cutting large-scale low-frequency vortices into small-scale high-frequency vortices, so that the sound wave energy is scattered quickly, thereby reducing broadband noise and thus reducing the aerodynamic noise when the axial flow fan blades rotate.

[0078] In some embodiments of this application, the length of the turbulence structure 113 along the rotation axis of the impeller 110 is L1, and the length of the turbulence structure housed in the cylindrical guide channel 121 is L2, wherein L2 / L1 is greater than 0.8. In this embodiment, along the rotation direction A of the impeller 110, 80% of the length of the turbulence structure 113 is disposed within the cylindrical guide channel 121 of the guide member 120, thereby confining most of the airflow from the fan blade 111 within the cylindrical guide channel 121 after passing through the turbulence structure 113. Due to the constraint of the cylindrical guide channel 121, large fluctuations in the airflow in the radial direction of the guide member 120 are avoided, thus preventing further noise generation from eddies.

[0079] In some embodiments of this application, the inner wall of the middle section 124 of the guide member 120 is cylindrical, and the preset gap 125 between the outer edge 114 of the impeller 110 blade and the inner wall surface of the middle section 124 is any value between 5mm and 15mm. In order to reduce airflow noise, the preset gap 125 should be as small as possible. Considering the actual situation of the guide member 120, such as the installation accuracy and the size limitation between the impeller and the guide member 120, the preset gap can be set to any vertical value in the above range.

[0080] In some embodiments of this application, the fan blade 111 has a first end 115 along a first direction and a second end 116 along a second direction. Both the first and second directions are along the rotation axis of the impeller 110 and are opposite in direction. The first end 115 is located on one side of the cylindrical guide channel 121, and the second end 116 is located on the other side of the cylindrical guide channel 121. In this embodiment, the axial distance of the impeller 110 of the air supply assembly 100 is approximately the same as the axial distance of the cylindrical guide channel 121 of the guide member 120. That is, along the rotation axis of the impeller 110, both ends of the fan blade 111 are located at the edge region of the intermediate section 124.

[0081] In this embodiment, the two ends of the fan blade 111 of the impeller 110 along the rotation axis are approximately located in the edge region of the middle section 124 of the guide member 120. As a result, the airflow passing through the trailing edge 112 of the fan blade is mostly confined within the middle section 124 of the guide member 120. Therefore, it is possible to prevent the airflow from fluctuating in the radial direction of the guide member 120 and further prevent noise generation.

[0082] The edge region of a straight cylindrical flow guide channel refers to the area connected to the straight cylindrical flow guide channel. For example, when the flow guide channel includes an inlet section, an outlet section, and a middle section, the middle section is a straight cylindrical flow guide channel, which is also connected to the inlet section and the outlet section. The edge region of the straight cylindrical flow guide channel is the connection area between the middle section and the inlet section, and the connection area between the middle section and the outlet section.

[0083] Regarding the sources of noise in the air supply assembly 100 of the present invention, one is that after the vortex leaves the fan blade 111, it causes air pressure pulsation at the airflow wake. When the pulsating air pressure acts on the air supply assembly 100, noise is generated. Another is that after the airflow leaves the trailing edge 112 of the fan blade, the airflow fluctuates in the radial direction of the guide member 120.

[0084] In some embodiments of this application, the flow channel 121 includes an inlet section 122, an outlet section 123, and an intermediate section 124. The intermediate section 124 is located between the inlet section 122 and the outlet section 123. The cylindrical flow channel 121 is located in the intermediate section 124. Both the outlet section 123 and the inlet section 122 are funnel-shaped, wherein the funnel shape of the outlet section 123 expands outward, and the funnel shape of the inlet section 122 expands outward.

[0085] In this embodiment, both the outlet section 123 and the inlet end are configured as funnel-shaped, which can diffuse the airflow, increase the airflow area, and thus improve the air guide component's ability to guide the airflow.

[0086] In some embodiments of this application, the outlet section 123 is provided with a first noise reduction structure 130, which is connected to the middle section 124. Most of the sawtooth-shaped turbulence structures 113 are housed in the middle section 124. The first noise reduction structure 130 is provided in the outlet section 123 of the guide member 120. When the impeller 110 rotates, the frequency of the regular interference between the driven airflow and the surrounding objects is increased. The frequency of the low-frequency noise accumulated by the rotation of the impeller 110 is increased, and the peak of the rotational noise in the same frequency band is reduced. This reduces the low-frequency noise during use and effectively improves the user experience.

[0087] The first noise reduction structure 130 can be a protrusion on the inner wall of the outlet section 123, a cut surface, or a combination of a protrusion and a cut surface. The cut surface on the inner wall of the outlet section 123 has a plane that is smoothly connected to the inner wall. The connection between the plane and the inner wall can be straight, curved, or arc-shaped. When the airflow flows from the inner wall of the outlet section 123 to the cut surface, the distance in the direction perpendicular to the rotation axis of the impeller 110 changes, i.e., the radial distance changes, which increases the interference of the airflow and reduces the rotational noise peaks in the same frequency band, thereby reducing the airflow noise. When multiple cut surfaces are provided on the inner wall of the outlet section 123, or when they are uniformly arranged along the axial direction of the guide 120, the airflow can be periodically interfered with on the inner wall of the outlet section 123, and the noise peaks in the airflow are reduced more significantly.

[0088] The protrusion provided on the inner wall of the outlet section 123 has an arc-shaped wall surface and is smoothly connected to the inner wall surface of the outlet section 123. Because the protrusion is provided on the inner wall of the outlet section 123, when the airflow flows from the inner wall surface of the outlet section 123 to the arc-shaped wall surface of the protrusion, the distance in the direction perpendicular to the axial direction of the guide 120 changes, that is, the radial distance occurs, which causes the airflow to be interfered with, and the rotational noise spikes in the same frequency band are reduced, thereby reducing airflow noise.

[0089] In some embodiments of this application, a second noise reduction structure 140 can be provided at the inlet end of the guide 120. The second noise reduction structure 140 is connected to the middle section 124 of the guide 120. The second noise reduction structure can be a cut surface, a protrusion, or a combination of cut surface and protrusion. It has a similar technical effect to the first noise reduction structure 130 at the outlet end. The airflow is subjected to regular interference. When multiple cut surfaces or protrusions are provided, the interference frequency of the airflow is increased, the frequency of the low-frequency noise accumulated by the rotation of the impeller 110 is increased, and the rotation noise spikes in the same frequency band are reduced, thereby reducing the low-frequency noise during use.

[0090] In some embodiments of this application, a plurality of transverse ribs 126 and a plurality of longitudinal ribs 127 are also provided on the outer wall of the guide member 120. The transverse ribs 126 and longitudinal ribs 127 can improve the connection rigidity of the guide member 120. When the impeller 110 rotates at high speed, even if it is impacted by the airflow, the guide member 120 will not vibrate. The plurality of transverse ribs 126 are arranged at intervals, and the plurality of longitudinal ribs 127 are arranged at intervals. The transverse ribs 126 and longitudinal ribs 127 are arranged alternately on the outer wall of the guide member 120, which further improves the strength of the guide member 120. The outer wall of the guide member 120 can be set as a circular structure, a square structure, etc., according to the actual situation.

[0091] This application also provides an outdoor unit 200 for an air conditioner, which includes a first housing 210 and an air supply assembly 100 as described in any of the preceding claims. The air supply assembly 100 is disposed inside the first housing 210. The first housing 210 is provided with a first air inlet 212 and a first air outlet 211. The first air outlet 211 is disposed at the top of the first housing 210. The first air outlet 211 of the first housing 210 is disposed opposite to the air outlet of the air supply assembly 100, thereby the first housing 210 and the air supply assembly 100 form an independent air supply module.

[0092] The outdoor unit 200 of the air conditioner also includes a heat exchanger assembly 220. The heat exchanger is located below the air supply module. The heat exchanger assembly 220 surrounds and forms a heat exchange air duct 221. The heat exchange duct is connected to the first air inlet 212 of the first housing 210. In this embodiment, the outdoor unit 200 of the air conditioner adopts an upward air outlet structure, with the air supply module located above the heat exchanger assembly 220.

[0093] In some embodiments of the present invention, the outdoor unit 200 of the air conditioner further includes a second housing 230, and the heat exchanger in the heat exchanger assembly 220 extends along the side wall of the second housing 230. A second air inlet 231 is also provided on the second housing 230, and the second air inlet 231 is disposed opposite to the heat exchanger. In this embodiment, the second housing 230 and the heat exchanger assembly 220 form a heat exchange module, which is disposed below the air supply module. An airflow path is formed between the second air inlet 231 of the second housing 230 and the first air outlet 211 of the first housing 210. The airflow passes through at least the heat exchanger, the heat exchange duct 221, the impeller, and the guide member 120.

[0094] The outdoor unit 200 of the air conditioner also includes an electrical control box 240. An opening structure 222 is provided on one side of the heat exchange duct 221 formed by the heat exchanger. The electrical control box 240 is located in the opening structure 222. The heat exchange duct 221 and the electrical control box 240 together form the heat exchange duct 221.

[0095] In some embodiments of the present invention, the outdoor unit 200 of the air conditioner further includes a mesh cover 250, which is disposed at the first air outlet 211 of the first housing 210. The mesh cover 250 is provided with a grille structure 251, which is disposed opposite to the impeller 110. The grille structure 251 is also connected to the drive assembly 150 of the air supply assembly 100. The drive assembly 150 includes at least a drive shaft, which is connected to the hub of the impeller 110 and is used to drive the impeller 110 to rotate.

[0096] A third aspect of the present invention also provides an air conditioner comprising an outdoor unit 200 as described in any of the preceding claims.

[0097] The outdoor unit including the air supply component 100 provided in this application can also be applied to HVAC equipment, including but not limited to multi-split systems, heat pumps, water heaters, swimming pool units, etc.

[0098] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An air supply assembly, characterized in that, The air supply assembly includes: A wind turbine has at least one blade, the blade having a trailing edge and an outer edge, the outer edge being located on the side of the blade opposite to the rotation axis of the wind turbine, the trailing edge being connected to the outer edge, the trailing edge being oriented opposite to the rotation direction of the wind turbine, and a turbulence structure being provided on the trailing edge. A flow guide has a flow guide channel sleeved on the outside of the wind turbine. At least a portion of the inner wall of the flow guide channel is cylindrical and has a preset gap with the outer edge of the fan blade. The preset gap is used to restrict the airflow formed on the fan blade from moving in the radial direction of the flow guide channel. At least a portion of the turbulence structure is housed within the cylindrical portion of the flow guide channel. Along the rotation axis of the wind turbine, the size of the turbulence structure is L1, and the length of the turbulence structure housed in the cylindrical portion of the flow guide channel is L2, wherein L2 / L1 is greater than 0.

8.

2. The air supply assembly according to claim 1, characterized in that, The turbulence structure includes multiple recesses and multiple protrusions, which are alternately arranged along the extension direction of the trailing edge of the fan blade.

3. The air supply assembly according to claim 2, characterized in that, Along the rotation axis of the wind turbine, the recesses and protrusions have a height difference, wherein all of the recesses are housed within the cylindrical portion of the flow channel.

4. The air supply assembly according to claim 2, characterized in that, The turbulence structure is arranged in a sawtooth shape.

5. The air supply assembly according to any one of claims 1-4, characterized in that, The fan blade has a first end and a second end along the rotation axis of the wind turbine; The first end is located at the edge region of one end of the cylindrical flow channel, and the second end is located at the edge region of the other end of the cylindrical flow channel.

6. The air supply assembly according to claim 1, characterized in that, The preset gap is any value between 5mm and 15mm.

7. The air supply assembly according to claim 4, characterized in that, The flow channel includes an inlet section, an outlet section, and an intermediate section. The intermediate section is located between the inlet section and the outlet section. The intermediate section is cylindrical. Along the direction from the inlet section to the outlet section, the inner diameter of the outlet section gradually increases, and along the direction from the inlet section to the outlet section, the inner diameter of the inlet section gradually decreases.

8. The air supply assembly according to claim 7, characterized in that, The outlet section is equipped with a first noise reduction structure, and most of the sawtooth-shaped turbulence structure is housed in the middle section.

9. The air supply assembly according to claim 8, characterized in that, The inlet section is equipped with a second noise reduction structure.

10. The air supply assembly according to any one of claims 1-4, characterized in that, The outer wall of the flow guide is provided with reinforcing ribs.

11. The air supply assembly according to claim 10, characterized in that, The outer wall of the guide includes multiple horizontal ribs and multiple vertical ribs. The multiple horizontal ribs are spaced apart along the rotation axis of the wind turbine, and the multiple vertical ribs are spaced apart along the circumference of the guide. The horizontal ribs and the vertical ribs are intersecting on the outer wall of the guide.

12. An outdoor unit for an air conditioner, characterized in that, The outdoor unit of the air conditioner includes: A first housing, the first housing having a first air outlet and a first air inlet, the first air outlet being located at the top of the housing; The air supply assembly according to any one of claims 1-11, wherein the air supply assembly is disposed within the first housing, the air supply assembly has an air outlet, and the air outlet is disposed opposite to the first air outlet.

13. The outdoor unit of the air conditioner according to claim 12, characterized in that, The outdoor unit of the air conditioner also includes a heat exchanger assembly, which is located below the first housing. The heat exchanger assembly forms a heat exchange air duct, which is connected to the first air inlet.

14. The outdoor unit of the air conditioner according to claim 13, characterized in that, The outdoor unit of the air conditioner also includes: The second housing, wherein the heat exchanger assembly is disposed on the side wall of the second housing; An electrical control box is located on the side wall of the second housing, and the heat exchanger and the electrical control box together form the heat exchange duct.

15. The outdoor unit of an air conditioner according to any one of claims 12-14, characterized in that, The outdoor unit of the air conditioner also includes: A mesh cover is provided at the first air outlet of the first housing, and the mesh cover has a grid structure, which is arranged opposite to the impeller. The air supply assembly also includes a drive assembly, which is connected to the grille structure, and the drive shaft of the drive assembly is connected to the impeller.

16. An air conditioner, characterized in that, The air conditioner includes the outdoor unit of the air conditioner as described in any one of claims 12 to 15.

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