Fan volute and air conditioner

Abstract

The fan volute comprises a volute body, an airflow inlet, an airflow outlet and an air duct are formed in the volute body, the air duct is communicated with the airflow inlet and the airflow outlet, the air duct comprises a wind wheel cavity and an air outlet channel which are communicated, the wind wheel cavity is used for containing a wind wheel, and the air outlet channel is located on the radial outer side of the wind wheel cavity. The air outlet side of the air outlet channel forms an airflow outlet, the airflow inlet is formed in the axial side wall of the wind wheel cavity, the peripheral wall of the wind wheel cavity is the peripheral wall of the wind wheel cavity, and a diffusion groove is formed in the inner wall face of the peripheral wall of the wind wheel cavity. According to the fan volute disclosed by the embodiment of the utility model, the diffusion groove is formed in the inner wall surface of the peripheral wall of the wind wheel cavity of the air duct, so that large-scale vortexes in the air duct can be damaged, the possibility that the large-scale vortexes are formed when airflow flows in the air duct is reduced or avoided, and the noise generated when the airflow flows in the air duct is favorably reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to air conditioning equipment technical field especially is a fan volute and air conditioner. BACKGROUND

[0002] In the related art, the fan assembly in the air conditioning equipment such as air conditioner includes a fan wheel and a fan volute for accommodating the fan wheel, a wind channel is formed in the fan volute, and the air flow is facilitated to circulate in the fan volute. However, due to the limitation of the structure of the fan volute, when the air flow flows in the wind channel, a large noise is generated. Therefore, it is necessary to be solved. SUMMARY

[0003] The utility model discloses at least one of the technical problems in the prior art. Therefore, one purpose of the utility model is to provide a fan volute. By forming a pressure expansion groove on the inner wall surface of the peripheral wall of the fan wheel cavity of the wind channel, the large-scale vortex in the wind channel can be destroyed, the possibility of forming a large-scale vortex when the air flow flows in the wind channel can be reduced or avoided, and the noise when the air flow flows in the wind channel can be reduced.

[0004] The utility model further provides an air conditioner comprising the above-mentioned fan volute.

[0005] According to the fan volute of the first aspect of the utility model, the fan volute comprises a volute body, the volute body is formed with an air inlet, an air outlet and a wind channel, the wind channel is communicated with the air inlet and the air outlet, the wind channel comprises a fan wheel cavity and an air outlet channel communicated, the fan wheel cavity is used for accommodating the fan wheel, the air outlet channel is located on the radial outer side of the fan wheel cavity, the air outlet side of the air outlet channel constitutes the air outlet, the air inlet is formed on the axial side wall of the fan wheel cavity, the peripheral wall of the fan wheel cavity is a fan wheel cavity peripheral wall, and the inner wall surface of the fan wheel cavity peripheral wall is formed with a pressure expansion groove.

[0006] According to the fan volute of the utility model, by forming a pressure expansion groove on the inner wall surface of the peripheral wall of the fan wheel cavity of the wind channel, the large-scale vortex in the wind channel can be destroyed, the possibility of forming a large-scale vortex when the air flow flows in the wind channel can be reduced or avoided, and the noise when the air flow flows in the wind channel can be reduced.

[0007] According to some embodiments of the utility model, in the direction from the two ends of the pressure expansion groove along the circumferential direction of the fan wheel cavity to the middle part of the pressure expansion groove, the size of the pressure expansion groove in the axial direction of the fan wheel gradually increases.

[0008] According to some embodiments of the utility model, in the circumferential direction of the fan wheel cavity, the contour line of the pressure expansion groove is an arc line.

[0009] According to some embodiments of the present invention, in the circumferential direction of the impeller cavity, the outline of the diffuser groove is an arc.

[0010] According to some embodiments of this utility model, in the circumferential direction of the impeller cavity, the central angle corresponding to the outline of the diffuser groove is β, where π / 12≤β≤π.

[0011] According to some embodiments of the present invention, β further satisfies: π / 8 ≤ β ≤ π / 2.

[0012] According to some embodiments of this utility model, the radius corresponding to the outline of the diffuser groove is r, the curl of the vortex of the volute body is curl(F), and r satisfies: r=curl(F) / 2π.

[0013] According to some embodiments of this utility model, the maximum dimension of the diffuser groove in the axial direction of the wind turbine is t, and the depth of the wind turbine cavity in the axial direction of the wind turbine is w, where t and w satisfy: w / 6≤t≤w / 2.

[0014] According to some embodiments of the present invention, the profile of the volute body includes a volute tongue segment, a first arc segment, a second arc segment, a third arc segment, and an outlet straight segment. The volute tongue segment, the first arc segment, the second arc segment, the third arc segment, and the outlet straight segment extend circumferentially along the volute body and are connected sequentially. The first arc segment, the second arc segment, and the third arc segment are concentrically arranged and their radii increase sequentially. The profile of the impeller cavity peripheral wall includes the first arc segment, the second arc segment, and the third arc segment. The second arc segment and / or the first arc segment forms the diffusion groove.

[0015] According to some embodiments of the present invention, the volute body includes a first volute and a second volute connected axially along the impeller. The first volute and the second volute together define the air duct. The airflow inlet is formed in the first volute, and the airflow outlet is formed in the second volute, or the first volute and the second volute together define the airflow outlet. The first volute includes a first volute base plate and a first volute side plate. The second volute includes a second volute base plate and a second volute side plate. In the axial direction of the impeller, the first volute side plate is connected to the side of the first volute base plate facing the second volute base plate, and the second volute side plate is connected to the side of the second volute base plate facing the first volute base plate. The second volute side plate is located outside the first volute side plate. The first volute side plate has a diffusion groove formed thereon. A portion of the second volute side plate is located radially outside the diffusion groove along the impeller cavity to cover the opening of the diffusion groove radially outside the impeller cavity.

[0016] According to some embodiments of the present invention, the end face of the first volute side plate facing the second volute bottom plate is the first end face, and the expansion groove penetrates through the first end face.

[0017] According to some embodiments of this utility model, the maximum dimension of the diffusion groove in the axial direction of the wind turbine is t, and the distance between the diffusion groove and the first volute bottom plate in the axial direction of the wind turbine is d, where t and d satisfy: d / 3≤t≤d.

[0018] According to some embodiments of the present invention, a sealing layer is provided between the first volute side plate and the second volute side plate, and the sealing layer surrounds the outer periphery of the diffuser groove.

[0019] According to some embodiments of the present invention, the wall thickness of the first volute is greater than the wall thickness of the second volute; and / or, the first volute is a plastic part and the second volute is a metal part.

[0020] According to some embodiments of the present invention, the end face of the first volute side plate facing the second volute bottom plate is the first end face, and the first end face and the second volute bottom plate abut against each other in the axial direction of the impeller.

[0021] An air conditioner according to a second aspect of the present invention includes: a housing assembly having an air inlet and an air outlet formed thereon; a fan assembly including a fan impeller and a fan volute according to a first aspect of the present invention, the fan impeller being disposed within the air duct; and a heat exchanger assembly disposed within the housing assembly and located between the fan volute and the air inlet.

[0022] According to the embodiment of the present invention, the air conditioner includes a fan assembly. By forming a diffusion groove on the inner wall of the fan wheel cavity of the air duct, large-scale vortices in the air duct can be destroyed, thereby reducing or avoiding the possibility of large-scale vortices forming when the airflow flows in the air duct, which is beneficial to reducing the noise when the airflow flows in the air duct.

[0023] Additional aspects and advantages of this 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

[0024] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0025] Figure 1 This is a three-dimensional schematic diagram of a fan volute according to some embodiments of the present utility model;

[0026] Figure 2 yes Figure 1 Exploded view of the volute casing of a wind turbine;

[0027] Figure 3 yes Figure 1 A schematic diagram of the first volute in the wind turbine casing;

[0028] Figure 4 yes Figure 3 A schematic diagram of the first volute from another angle;

[0029] Figure 5 yes Figure 3 A schematic diagram of the first volute from another angle.

[0030] Figure label:

[0031] 100. Fan casing;

[0032] 1. Volute body; 11. Airflow inlet; 12. Airflow outlet; 13. Air duct; 131. Impeller cavity; 1311. Diffusion groove; 132. Air outlet channel; 14. First volute; 141. First volute bottom plate; 142. First volute side plate; 1421. First end face; 15. Second volute; 151. Second volute bottom plate; 152. Second volute side plate; 161. Volute tongue section; 162. First arc section; 163. Second arc section; 164. Third arc section; 165. Straight outlet section. Detailed Implementation

[0033] The embodiments of this utility model 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 this utility model, and should not be construed as limiting this utility model.

[0034] The following is for reference. Figures 1-5 Description of a fan volute 100 according to an embodiment of the present utility model.

[0035] Reference Figures 1-4According to the first aspect of the present invention, the fan volute 100 includes a volute body 1, which has an airflow inlet 11, an airflow outlet 12 and an air duct 13. The air duct 13 connects the airflow inlet 11 and the airflow outlet 12. The air duct 13 includes a connected impeller cavity 131 and an air outlet channel 132. The impeller cavity 131 is used to accommodate the impeller. The air outlet channel 132 is located on the radial outer side of the impeller cavity 131. The air outlet side of the air outlet channel 132 constitutes the airflow outlet 12. The airflow inlet 11 is formed on the axial sidewall of the impeller cavity 131. The peripheral wall of the impeller cavity 131 is the peripheral wall of the impeller cavity 131. A diffusion groove 1311 is formed on the inner wall surface of the peripheral wall of the impeller cavity 131.

[0036] The impeller is housed within the impeller cavity 131, allowing for a compact overall structure of the impeller and the fan casing 100. The air duct 13 connects the airflow inlet 11 and the airflow outlet 12, facilitating the flow of air from the airflow inlet 11 to the airflow outlet 12. During operation, the impeller drives airflow outside the fan casing 100 into the impeller cavity 131 through the airflow inlet 11, flowing towards the air outlet duct 132, and then exiting through the airflow outlet 12 to the outside of the fan casing 100.

[0037] For example, when the airflow flows in the air duct 13, the airflow in the impeller cavity 131 is prone to forming large-scale vortices. The formation of large-scale vortices will lead to uneven airflow pressure distribution, which will cause greater noise when the airflow flows in the impeller cavity 131.

[0038] By forming a diffusion groove 1311 on the inner wall of the wind turbine cavity 131, large-scale vortices in the wind duct 13 can be destroyed, thereby reducing or avoiding the possibility of large-scale vortices forming when the airflow flows in the wind duct 13, and thus reducing the noise when the airflow flows in the wind turbine cavity 131.

[0039] For example, when the airflow passes through the diffuser groove 1311, the diffuser groove 1311 changes the boundary of the peripheral wall of the impeller cavity 131, and the flow direction and speed of the airflow are affected accordingly. For example, the flow direction or speed of the airflow changes, thereby reducing or avoiding the possibility of the airflow forming a large-scale vortex. This can reduce the noise when the airflow flows in the impeller cavity 131, and can also reduce or avoid the occurrence of more intense pressure pulsations in the impeller cavity 131.

[0040] Referring to Table 1 below, the data in Table 1 are the air volume and noise values ​​of the fan volute in the related art and the fan volute 100 in the embodiments of this application at different speeds.

[0041] Table 1

[0042]

[0043]

[0044] Table 1 shows that when the impeller speed is 400 r / min, the air volume inside the fan casing in the related technology is 1020 CFM and the noise is 43.3 dBA. In this embodiment, the air volume inside the fan casing 100 is 1015 CFM and the noise is 42.7 dBA. Compared with the noise in the fan casing in the related technology, the noise in the fan casing 100 in this embodiment is effectively reduced. When the impeller speed is 560 r / min, the air volume inside the fan casing in the related technology is 1504 CFM and the noise is 53.5 dBA. In this embodiment, the air volume inside the fan casing 100 is 1504 CFM and the noise is 52.9 dBA. Compared with the noise in the fan casing in the related technology, the noise in the fan casing 100 in this embodiment is effectively reduced.

[0045] The above analysis shows that, when the rotor speed is the same, the noise inside the fan casing 100 in this embodiment of the application is effectively reduced.

[0046] According to the embodiment of the present invention, the fan volute 100 has a diffusion groove 1311 formed on the inner wall surface of the fan wheel cavity 131 of the air duct 13, which can destroy the large-scale vortex in the air duct 13, thereby reducing or avoiding the possibility of forming a large-scale vortex when the airflow flows in the air duct 13, which is beneficial to reducing the noise when the airflow flows in the air duct 13.

[0047] Reference Figure 2 and Figure 3 According to some embodiments of this utility model, the size of the diffusion groove 1311 gradually increases in the axial direction of the impeller along the direction from both ends of the diffusion groove 1311 in the circumferential direction of the impeller cavity 131 to the middle of the diffusion groove 1311. This gradual increase in the size of the diffusion groove 1311 in the axial direction of the impeller enables a gradual diffusion process. This reduces or avoids the formation of large-scale vortices when the airflow flows within the duct 13, thereby reducing noise during airflow within the duct 13. Simultaneously, it ensures that the change in the peripheral wall of the impeller cavity 131 is gradual, reducing the phenomenon of surge caused by abrupt changes in airflow.

[0048] Reference Figures 2-4According to some embodiments of this utility model, the outline of the diffusion groove 1311 in the circumferential direction of the impeller cavity 131 is an arc. When the airflow flows along the peripheral wall of the impeller cavity 131, the arc-shaped diffusion groove 1311 can reduce airflow separation. While reducing or avoiding the formation of large-scale vortices when the airflow flows in the air duct 13, it can also reduce the noise generated by airflow separation during flow. In addition, the arc-shaped diffusion groove 1311 can be close to the shape of the peripheral wall of the impeller cavity 131. This can make full use of the space of the peripheral wall of the impeller cavity 131. The diffusion groove 1311 is formed along the circumference of the impeller, which can destroy large-scale vortices in the air duct 13, thereby reducing or avoiding the formation of large-scale vortices when the airflow flows in the air duct 13, and also reducing or avoiding the occupation of a lot of radial outer space of the impeller cavity 131.

[0049] Reference Figures 2-4 According to some embodiments of this utility model, the outline of the diffuser groove 1311 in the circumferential direction of the impeller cavity 131 is an arc. The arc outline of the diffuser groove 1311 makes the connection between the diffuser groove 1311 and the peripheral wall of the impeller cavity 131 smoother and more efficient. This reduces the separation loss of airflow caused by the abrupt change in curvature at the connection between the diffuser groove 1311 and the peripheral wall of the impeller cavity 131, and also reduces the noise generated by the airflow at the connection between the diffuser groove 1311 and the peripheral wall of the impeller cavity 131.

[0050] Reference Figures 2-4 According to some embodiments of the present invention, in the circumferential direction of the impeller cavity 131, the central angle corresponding to the outline of the diffusion groove 1311 is β, where π / 12≤β≤π. For example, the central angle β corresponding to the outline of the diffuser groove 1311 can be π / 12, π / 8, π / 6, π / 3, π, etc. By ensuring that the central angle β corresponding to the outline of the diffuser groove 1311 is not less than π / 12, the diffuser groove 1311 can have a certain length in the circumferential direction of the impeller cavity 131, so as to reduce or avoid the formation of large-scale vortices when the airflow flows in the air duct 13, thereby reducing the noise when the airflow flows in the impeller cavity 131. By ensuring that the central angle β corresponding to the outline of the diffuser groove 1311 is not greater than π, the airflow can flow more stably in the impeller cavity 131, avoiding the excessively high pressure of the airflow caused by the excessive length of the diffuser groove 1311 in the circumferential direction of the impeller cavity 131. If the airflow pressure is too high, it is easy to cause the airflow to be too unstable.

[0051] By using π / 12≤β≤π, the diffuser groove 1311 can have a longer length in the circumferential direction of the impeller cavity 131. This reduces or avoids the formation of large-scale vortices when the airflow flows in the duct 13, thereby reducing the noise when the airflow flows in the impeller cavity 131. It also avoids the stability of the airflow flowing in the impeller cavity 131 due to the excessive length of the diffuser groove 1311.

[0052] Reference Figures 2-4 According to some embodiments of this utility model, β further satisfies: π / 8 ≤ β ≤ π / 2. For example, the central angle β corresponding to the outline of the diffuser groove 1311 can be π / 8, π / 6, π / 5, π / 3, π / 2, etc. By ensuring that β is not less than π / 8, the diffuser groove 1311 can have a longer length in the circumferential direction of the impeller cavity 131, so as to reduce or avoid the formation of large-scale vortices when the airflow flows in the air duct 13, thereby effectively reducing the noise when the airflow flows in the impeller cavity 131; by ensuring that β is not greater than π / 2, the length of the diffuser groove 1311 can be effectively avoided from being too long in the circumferential direction of the impeller cavity 131, thus affecting the stability of the airflow.

[0053] By ensuring that β satisfies π / 8≤β≤π / 2, the diffusion effect of the diffuser groove 1311 on the airflow and the stability of the airflow can be better balanced.

[0054] Reference Figures 2-4 According to some embodiments of this utility model, the radius corresponding to the outline of the diffuser groove 1311 is r, and the curl of the vortex of the volute body 1 is curl(F). r satisfies: r=curl(F) / 2π. The radius corresponding to the outline of the diffuser groove 1311 can be determined more accurately according to the vortex of the volute body 1. This can more effectively reduce or avoid the formation of large-scale vortices when the airflow flows in the air duct 13.

[0055] Reference Figures 2-4 According to some embodiments of this utility model, the maximum dimension of the diffuser groove 1311 in the axial direction of the impeller is t, and the depth of the impeller cavity 131 in the axial direction of the impeller is w, where t and w satisfy: w / 6≤t≤w / 2. For example, t and w can be w / 20, w / 16, w / 12, w / 10, w / 8, etc. By ensuring that t and w are not less than w / 6, the depth of the diffuser groove 1311 can be larger, which can effectively disrupt large-scale vortices in the air duct 13, thereby reducing or avoiding the formation of large-scale vortices when the airflow flows in the air duct 13, thus effectively reducing the noise of the airflow flowing in the impeller cavity 131. By ensuring that t and w are not greater than w / 2, the excessively high airflow pressure caused by the excessively large depth of the diffuser groove 1311 in the axial direction of the impeller cavity 131 can be reduced or avoided. If the airflow pressure is too high, it is easy to cause the airflow to have low stability.

[0056] By satisfying w / 6≤t≤w / 2, the depth of the diffuser groove 1311 can be made larger, so as to reduce or avoid the formation of large-scale vortices when the airflow flows in the air duct 13, thereby effectively reducing the noise when the airflow flows in the impeller cavity 131, and also avoiding the stability of the airflow flowing in the impeller cavity 131 due to the excessive depth of the diffuser groove 1311.

[0057] Reference Figures 2-5 According to some embodiments of this utility model, the profile of the volute body 1 includes a volute tongue segment 161, a first arc segment 162, a second arc segment 163, a third arc segment 164, and an outlet straight segment 165. The volute tongue segment 161, the first arc segment 162, the second arc segment 163, the third arc segment 164, and the outlet straight segment 165 extend circumferentially along the volute body 1 and are connected sequentially, providing a continuous flow path for the airflow. The first arc segment 162, the second arc segment 163, and the third arc segment 164 are concentrically arranged, and their radii increase sequentially, so that the flow cross-section of the air duct 13 gradually increases, which allows the airflow to flow more smoothly toward the air outlet channel 132, and helps to reduce the noise generated when the airflow flows in the air duct 13.

[0058] The profile of the peripheral wall of the impeller cavity 131 includes a first arc segment 162, a second arc segment 163, and a third arc segment 164. The second arc segment 163 and / or the first arc segment 162 form a diffusion groove 1311. For example, the second arc segment 163 may form a diffusion groove 1311; another example is that the first arc segment 162 may form a diffusion groove 1311; yet another example is that both the first arc segment 162 and the second arc segment may form diffusion grooves 1311.

[0059] By forming a diffuser groove 1311 in the second arc segment 163 and / or the first arc segment 162, the possibility of forming a large-scale vortex when the airflow flows in the impeller cavity 131 corresponding to the second arc segment 163 or the first arc segment 162 can be reduced or avoided, thereby reducing the noise when the airflow flows in the impeller cavity 131 corresponding to the second arc segment 163 or the first arc segment 162.

[0060] Reference Figures 1-3According to some embodiments of the present invention, the volute body 1 includes a first volute 14 and a second volute 15 connected along the axial direction of the impeller. The first volute 14 and the second volute 15 together define an air duct 13. An airflow inlet 11 is formed in the first volute 14, and an airflow outlet 12 is formed in the second volute 15, or the first volute 14 and the second volute 15 together define an airflow outlet 12. The first volute 14 includes a first volute bottom plate 141 and a first volute side plate 142, and the second volute 15 includes a second volute bottom plate 151 and a second volute side plate 152. In the direction of rotation, the first volute side plate 142 is connected to the side of the first volute bottom plate 141 facing the second volute bottom plate 151, and the second volute side plate 152 is connected to the side of the second volute bottom plate 151 facing the first volute bottom plate 141. The second volute side plate 152 is located outside the first volute side plate 142. A diffusion groove 1311 is formed on the first volute side plate 142. A portion of the second volute side plate 152 is located on the radially outer side of the diffusion groove 1311 along the impeller cavity 131 to cover the radially outer opening of the diffusion groove 1311 along the impeller cavity 131.

[0061] The portion of the second volute side plate 152 located radially outside the diffuser groove 1311 along the impeller cavity 131 can be used to cover the radially outer opening of the diffuser groove 1311 along the impeller cavity 131, so that the outer wall surface of the impeller cavity 131 forms a relatively complete structure, thereby reducing or avoiding airflow leakage from the radially outer opening of the diffuser groove 1311 to the outside of the impeller cavity 131. Correspondingly, it can avoid the possibility of reduced diffusion effect due to airflow leakage, and can also reduce dust, water, etc. flowing into the impeller cavity 131 through the radially outer opening of the diffuser groove 1311. It can also enhance the overall structural strength of the volute body 1.

[0062] Reference Figures 1-3 According to some embodiments of this utility model, the end face of the first volute side plate 142 facing the second volute bottom plate 151 is the first end face 1421, and the diffusion groove 1311 penetrates the first end face 1421. The diffusion groove 1311 penetrating the first end face 1421 can provide a larger diffusion space for the airflow, so as to more effectively reduce or avoid the formation of large-scale vortices when the airflow flows in the air duct 13, thereby effectively reducing the noise when the airflow flows in the impeller cavity 131.

[0063] Reference Figures 2-4According to some embodiments of this utility model, the maximum dimension of the diffusion groove 1311 in the axial direction of the impeller is t, and the distance between the diffusion groove 1311 and the first volute bottom plate 141 in the axial direction of the impeller is d, where t and d satisfy: d / 3 ≤ t ≤ d. For example, t and d can be d / 3, d / 2, d, etc. By ensuring that t and d are not less than d / 3, the depth of the diffusion groove 1311 in the axial direction of the impeller can be larger, so that the airflow can be effectively diffused at the diffusion groove 1311, thereby effectively reducing the noise of the airflow flowing in the impeller cavity 131. By ensuring that t and d are not greater than d, the excessively high airflow pressure caused by the excessively large depth of the diffusion groove 1311 in the axial direction of the impeller cavity 131 can be reduced or avoided. If the airflow pressure is too high, it is easy to reduce the stability of the airflow. It can also make the first volute side plate 142 have strong structural strength, avoiding the reduction of the structural strength of the first volute side plate 142 due to the excessively large depth of the diffusion groove 1311.

[0064] By ensuring that d / 3≤t≤d, the depth of the diffuser groove 1311 can be made larger, thereby reducing or avoiding the formation of large-scale vortices when the airflow flows in the air duct 13. This effectively reduces the noise when the airflow flows in the impeller cavity 131, and also avoids the stability of the airflow flowing in the impeller cavity 131 due to the excessive depth of the diffuser groove 1311. Furthermore, it also gives the first volute side plate 142 a stronger structural strength.

[0065] Reference Figures 2-4 According to some embodiments of the present invention, a sealing layer is provided between the first volute side plate 142 and the second volute side plate 152. The sealing layer surrounds the outer periphery of the diffuser groove 1311. The sealing layer can seal the gap between the outer periphery of the diffuser groove 1311 and the second volute side plate 152, so as to reduce or prevent airflow from leaking from the gap between the outer periphery of the diffuser groove 1311 and the second volute side plate 152 to the outside of the impeller cavity 131. Correspondingly, the possibility of reduced diffusion efficiency due to airflow leakage can be avoided.

[0066] Reference Figures 2-4 According to some embodiments of the present invention, the wall thickness of the first volute 14 is greater than the wall thickness of the second volute 15. The larger wall thickness can give the first volute 14 a stronger structural strength, reducing or avoiding the possibility that the first volute 14 may be deformed or even broken due to the high pressure in the impeller cavity 131.

[0067] Reference Figures 2-4According to some embodiments of this utility model, the first volute 14 is a plastic part, and the second volute 15 is a metal part. Making the second volute 15 a metal part gives it greater structural strength, reducing or avoiding the possibility of deformation due to the high pressure inside the impeller cavity 131. Furthermore, by making the first volute 14 a plastic part, its inherent properties allow it to have better heat insulation, making the temperature inside the impeller cavity 131 closer to the airflow temperature, thus reducing the temperature difference between the airflow temperature and the temperature inside the impeller cavity 131. This further reduces or avoids the possibility of condensation or water droplets forming in the impeller cavity 131 after heat exchange.

[0068] Reference Figures 2-4 According to some embodiments of this utility model, the end face of the first volute side plate 142 facing the second volute bottom plate 151 is the first end face 1421, and the first end face 1421 and the second volute bottom plate 151 abut against each other in the axial direction of the impeller. The abutment between the first end face 1421 and the second volute bottom plate 151 in the axial direction of the impeller can make the first volute 14 and the second volute 15 form a relatively tight connection along the axial direction of the impeller, and can minimize the gap between the first volute 14 and the second volute 15 in the axial direction of the impeller, so as to effectively reduce or avoid the possibility of airflow leaking from the gap between the first end face 1421 and the second volute bottom plate 151 to the outside of the impeller cavity 131.

[0069] The following reference Figures 1-5 The description includes a fan volute 100 according to some embodiments of the present invention.

[0070] Reference Figures 2-4 In this embodiment, the fan casing 100 includes a casing body 1, which has an airflow inlet 11, an airflow outlet 12, and an air duct 13. The air duct 13 connects the airflow inlet 11 and the airflow outlet 12. The air duct 13 includes a connected impeller cavity 131 and an air outlet channel 132. The impeller cavity 131 is used to accommodate the impeller. The air outlet channel 132 is located on the radial outer side of the impeller cavity 131. The air outlet side of the air outlet channel 132 constitutes the airflow outlet 12. The airflow inlet 11 is formed on the axial sidewall of the impeller cavity 131. The peripheral wall of the impeller cavity 131 is the peripheral wall of the impeller cavity 131. A diffusion groove 1311 is formed on the inner wall surface of the peripheral wall of the impeller cavity 131.

[0071] The profile of the volute body 1 includes a volute tongue segment 161, a first arc segment 162, a second arc segment 163, a third arc segment 164, and an outlet straight segment 165. The volute tongue segment 161, the first arc segment 162, the second arc segment 163, the third arc segment 164, and the outlet straight segment 165 extend circumferentially along the volute body 1 and are connected sequentially. The first arc segment 162, the second arc segment 163, and the third arc segment 164 are concentrically arranged and their radii increase sequentially. The profile of the peripheral wall of the impeller cavity 131 includes a first arc segment 162, a second arc segment 163, and a third arc segment 164. The second arc segment 163 and / or the first arc segment 162 form a diffusion groove 1311.

[0072] Along the direction from both ends of the diffuser groove 1311 in the circumferential direction of the impeller cavity 131 to the middle of the diffuser groove 1311, the dimension of the diffuser groove 1311 in the axial direction of the impeller gradually increases. In the circumferential direction of the impeller cavity 131, the outline of the diffuser groove 1311 is an arc. In the circumferential direction of the impeller cavity 131, the central angle corresponding to the outline of the diffuser groove 1311 is β, where π / 12 ≤ β ≤ π. The radius corresponding to the outline of the diffuser groove 1311 is r, and the curl of the vortex of the volute body 1 is curl(F), where r satisfies: r = curl(F) / 2π. The maximum dimension of the diffuser groove 1311 in the axial direction of the impeller is t, and the depth of the impeller cavity 131 in the axial direction of the impeller is w, where t and w satisfy: w / 6 ≤ t ≤ w / 2.

[0073] The volute body 1 includes a first volute 14 and a second volute 15 connected along the axial direction of the impeller. The first volute 14 and the second volute 15 together define an air outlet 13. An airflow inlet 11 is formed in the first volute 14, and an airflow outlet 12 is formed in the second volute 15, or the first volute 14 and the second volute 15 together define an airflow outlet 12. The first volute 14 includes a first volute base plate 141 and a first volute side plate 142. The second volute 15 includes a second volute base plate 151 and a second volute side plate 152. In the axial direction of the impeller, the first volute... The shell side plate 142 is connected to the side of the first volute bottom plate 141 facing the second volute bottom plate 151, and the second volute side plate 152 is connected to the side of the second volute bottom plate 151 facing the first volute bottom plate 141. The second volute side plate 152 is located outside the first volute side plate 142. A diffusion groove 1311 is formed on the first volute side plate 142. A portion of the second volute side plate 152 is located on the radially outer side of the diffusion groove 1311 along the impeller cavity 131 to cover the opening of the diffusion groove 1311 on the radially outer side of the impeller cavity 131.

[0074] The end face of the first volute side plate 142 facing the second volute bottom plate 151 is designated as the first end face 1421, and the diffusion groove 1311 penetrates through the first end face 1421. A sealing layer is provided between the first volute side plate 142 and the second volute side plate 152, and the sealing layer surrounds the outer periphery of the diffusion groove 1311. The end face of the first volute side plate 142 facing the second volute bottom plate 151 is designated as the first end face 1421, and the first end face 1421 and the second volute bottom plate 151 abut against each other in the axial direction of the impeller. The wall thickness of the first volute 14 is greater than the wall thickness of the second volute 15; and / or, the first volute 14 is a plastic part, and the second volute 15 is a metal part.

[0075] The maximum dimension of the diffuser groove 1311 in the axial direction of the impeller is t, and the distance between the diffuser groove 1311 and the first volute bottom plate 141 in the axial direction of the impeller is d. t and d satisfy: d / 3≤t≤d.

[0076] By forming a diffusion groove 1311 on the inner wall of the impeller cavity 131 of the air duct 13, the large-scale vortex in the air duct 13 can be destroyed, thereby reducing or avoiding the possibility of forming a large-scale vortex when the airflow flows in the air duct 13, which is beneficial to reducing the noise when the airflow flows in the air duct 13.

[0077] Reference Figures 1-3 An air conditioner according to a second aspect of the present invention includes a housing assembly, a fan assembly, and a heat exchanger assembly. The housing assembly has an air inlet and an air outlet. The fan assembly includes a fan impeller and a fan volute 100 according to a first aspect of the present invention. The fan impeller is disposed within an air duct 13. The heat exchanger assembly is disposed within the housing assembly and is located between the fan volute 100 and the air inlet. For example, the fan impeller can be a centrifugal fan impeller.

[0078] When the air conditioner is working, the fan drives the airflow into the casing assembly through the air inlet and flows to the heat exchanger assembly. After heat exchange by the heat exchanger assembly, the airflow can flow into the air duct 13 through the air inlet 11. The airflow in the air duct 13 flows to the air outlet 132, and then flows from the air outlet 132 to the air outlet 12. The airflow from the air outlet 12 flows to the air outlet and then flows out to the room to cool / heat the room.

[0079] According to the embodiment of the present invention, the air conditioner includes a fan assembly. By forming a diffusion groove 1311 on the inner wall surface of the fan cavity 131 of the air duct 13, the large-scale vortex in the air duct 13 can be destroyed, thereby reducing or avoiding the possibility of forming a large-scale vortex when the airflow flows in the air duct 13, which is beneficial to reducing the noise when the airflow flows in the air duct 13.

[0080] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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 this utility model.

[0081] In the description of this utility model, "first feature" and "second feature" may include one or more of the features.

[0082] In the description of this utility model, "multiple" means two or more.

[0083] In the description of this utility model, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0084] In the description of this utility model, 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 indicate that the first feature is at a higher horizontal level than the second feature.

[0085] 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 present 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.

[0086] Although embodiments of the present 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 present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A fan casing, characterized in that, The wind turbine casing includes a casing body, which forms an airflow inlet, an airflow outlet, and an air duct. The air duct connects the airflow inlet and the airflow outlet. The air duct includes a connected impeller cavity and an air outlet channel. The impeller cavity is used to accommodate the impeller. The air outlet channel is located on the radially outer side of the impeller cavity. The air outlet side of the air outlet channel constitutes the airflow outlet. The airflow inlet is formed on the axial sidewall of the impeller cavity. The peripheral wall of the impeller cavity is the impeller cavity peripheral wall. A diffusion groove is formed on the inner wall surface of the impeller cavity peripheral wall.

2. The fan casing according to claim 1, characterized in that, In the direction from both ends of the diffuser groove along the circumferential direction of the impeller cavity to the middle of the diffuser groove, the size of the diffuser groove gradually increases in the axial direction of the impeller.

3. The fan casing according to claim 2, characterized in that, In the circumferential direction of the impeller cavity, the outline of the diffuser groove is an arc.

4. The fan casing according to claim 3, characterized in that, In the circumferential direction of the impeller cavity, the outline of the diffuser groove is an arc.

5. The fan casing according to claim 4, characterized in that, In the circumferential direction of the impeller cavity, the central angle corresponding to the outline of the diffuser groove is β, where π / 12≤β≤π.

6. The fan casing according to claim 5, characterized in that, β further satisfies: π / 8 ≤ β ≤ π / 2.

7. The fan casing according to claim 4, characterized in that, The radius corresponding to the outline of the diffuser groove is r, and the curl of the vortex of the volute body is curl(F), where r satisfies: r = curl(F) / 2π.

8. The fan casing according to claim 1, characterized in that, The maximum dimension of the diffuser groove in the axial direction of the wind turbine is t, and the depth of the wind turbine cavity in the axial direction of the wind turbine is w. t and w satisfy: w / 6≤t≤w / 2.

9. The fan casing according to any one of claims 1-8, characterized in that, The profile of the volute body includes a volute tongue segment, a first arc segment, a second arc segment, a third arc segment, and an outlet straight segment. The volute tongue segment, the first arc segment, the second arc segment, the third arc segment, and the outlet straight segment extend circumferentially along the volute body and are connected sequentially. The first arc segment, the second arc segment, and the third arc segment are concentrically arranged and their radii increase sequentially. The profile of the impeller cavity peripheral wall includes the first arc segment, the second arc segment, and the third arc segment. The second arc segment and / or the first arc segment forms the diffusion groove.

10. The fan casing according to any one of claims 1-8, characterized in that, The volute body includes a first volute and a second volute connected axially along the impeller. The first volute and the second volute together define the air duct. The airflow inlet is formed in the first volute, and the airflow outlet is formed in the second volute, or the first volute and the second volute together define the airflow outlet. The first volute includes a first volute base plate and a first volute side plate. The second volute includes a second volute base plate and a second volute side plate. In the axial direction of the impeller, the first volute side plate is connected to the side of the first volute base plate facing the second volute base plate, and the second volute side plate is connected to the side of the second volute base plate facing the first volute base plate. The second volute side plate is located outside the first volute side plate. The first volute side plate has a diffusion groove formed thereon. A portion of the second volute side plate is located radially outside the diffusion groove along the impeller cavity to cover the opening of the diffusion groove radially outside the impeller cavity.

11. The fan casing according to claim 10, characterized in that, The end face of the first volute side plate facing the second volute bottom plate is the first end face, and the diffusion groove penetrates through the first end face.

12. The fan casing according to claim 10, characterized in that, The maximum dimension of the diffuser groove in the axial direction of the wind turbine is t, and the distance between the diffuser groove and the first volute bottom plate in the axial direction of the wind turbine is d. t and d satisfy: d / 3≤t≤d.

13. The fan casing according to claim 10, characterized in that, A sealing layer is provided between the first volute side plate and the second volute side plate, and the sealing layer surrounds the outer periphery of the diffuser groove.

14. The fan casing according to claim 10, characterized in that, The wall thickness of the first volute is greater than the wall thickness of the second volute; and / or, the first volute is a plastic part and the second volute is a metal part.

15. The fan casing according to claim 10, characterized in that, The end face of the first volute side plate facing the second volute bottom plate is the first end face, and the first end face abuts against the second volute bottom plate in the axial direction of the impeller.

16. An air conditioner, characterized in that, include: A housing assembly having an air inlet and an air outlet formed thereon; A wind turbine assembly, comprising a wind turbine rotor and a wind turbine casing according to any one of claims 1-15, wherein the wind turbine rotor is disposed within the wind duct; A heat exchanger assembly, which is disposed within the housing assembly and located between the fan volute and the air inlet.

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