Air conditioner

Abstract

The utility model discloses an air conditioner, including the casing subassembly, heat exchanger subassembly and air duct subassembly, the casing subassembly has the air inlet and the air outlet, heat exchanger subassembly is located in the casing subassembly, and air duct subassembly is located in the casing subassembly and includes air duct volute and air wheel, and air duct volute has the air duct, and the air duct is used for intercommunication air inlet and air outlet, and air wheel is located in the air duct, and air duct volute includes the front volute tongue, and the front volute tongue includes volute tongue tooth structure, and volute tongue tooth structure is located in the front volute tongue's one side near the air duct and protrudes from the inner wall surface of the front volute tongue to the air duct, and volute tongue tooth structure is unevenly distributed in the axial direction of air wheel. According to the air conditioner of the utility model embodiment, through setting volute tongue tooth structure at the front volute tongue of air duct volute, volute tongue tooth structure protrudes from the inner wall surface of the front volute tongue to the air duct and is unevenly distributed in the axial direction of air wheel, can effectively reduce the aerodynamic noise, reduce the air duct heterophonic, is favorable to the improvement air duct air supply sound quality, improves the use experience of user.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning equipment technology, and in particular to an air conditioner. Background Technology

[0002] In related technologies, the fan assembly in air conditioning equipment such as air conditioners includes an impeller and a fan casing that houses the impeller. An air duct is formed within the fan casing to facilitate airflow. However, due to the inherent structural limitations of the fan casing, significant turbulence is generated within the air duct as airflow moves through it, resulting in considerable noise and a poor user experience. Therefore, reducing noise within the air duct has become a pressing technical problem to be solved. Utility Model Content

[0003] This utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, one objective of this utility model is to provide an air conditioner in which the volute tooth structure within the air duct is non-uniformly distributed in the axial direction of the impeller, which can effectively reduce noise, lower duct noise, and improve the user experience.

[0004] An air conditioner according to an embodiment of the present invention includes: a housing assembly having an air inlet and an air outlet; a heat exchanger assembly disposed within the housing assembly; and an air duct assembly disposed within the housing assembly and including an air duct volute and a fan impeller. The air duct volute has an air duct for connecting the air inlet and the air outlet. The fan impeller is located within the air duct. The air duct volute includes a front volute tongue, and the front volute tongue includes volute tongue tooth structures. The volute tongue tooth structures are located on the side of the front volute tongue closest to the air duct and protrude toward the air duct from the inner wall surface of the front volute tongue. The volute tongue tooth structures are non-uniformly distributed in the axial direction of the fan impeller.

[0005] According to the embodiment of the present invention, the air conditioner has a volute tongue tooth structure set in the front volute tongue of the air duct volute. The volute tongue tooth structure protrudes from the inner wall of the front volute tongue and is non-uniformly distributed in the axial direction of the impeller. This can reduce airflow turbulence. For example, it can disperse the distorted flow field in the air duct, so that the high-order harmonics of the pressure pulsation generated by the eddy shedding in the distorted flow field are weakened by mutual superposition. This avoids high-frequency abnormal noise caused by the mutual superposition of the phases of the high-order harmonics of aerodynamic noise. This can effectively reduce aerodynamic noise, reduce air duct abnormal noise, improve the sound quality of air supply in the air duct, and enhance the user's experience.

[0006] According to some embodiments of the present invention, the volute tooth structure includes a plurality of volute teeth arranged at intervals along the axial direction of the impeller, wherein the plurality of volute teeth are not uniformly distributed in the axial direction of the impeller or at least some of the volute teeth have different maximum protrusion heights.

[0007] According to some embodiments of this utility model, the difference in the maximum protrusion height of any two volute teeth is Δb, the diameter of the impeller is D, and the absolute value of the ratio of Δb to D ranges from 0 to 4%.

[0008] According to some embodiments of the present invention, the plurality of volute teeth are divided into multiple groups of volute teeth arranged at intervals along the axial direction of the impeller. Each group of volute teeth includes a plurality of volute teeth arranged at intervals along the axial direction of the impeller. The distance between two adjacent groups of volute teeth in the axial direction of the impeller is greater than the distance between any two adjacent volute teeth in the same group of volute teeth in the axial direction of the impeller.

[0009] According to some embodiments of this utility model, the distance between two adjacent volute tooth sets in the axial direction of the impeller is a, the length of the impeller in the axial direction is L, and the ratio of a to L ranges from 1% to 50%.

[0010] According to some embodiments of the present invention, in the same group of volute tongue teeth, the spacing between any two adjacent volute tongue teeth in the axial direction of the impeller is the same; and / or, in the same group of volute tongue teeth, at least some of the volute tongue teeth are the same.

[0011] According to some embodiments of the present invention, in the same group of volute teeth, the distance between two adjacent volute teeth in the axial direction of the impeller is w, the distance between two adjacent volute teeth groups in the axial direction of the impeller is a, and the ratio of a to w ranges from 5 to 20.

[0012] According to some embodiments of the present invention, the housing assembly forms an air outlet channel, the air outlet channel is used to connect the air duct and the air outlet and is located on the downstream side of the impeller, the end of the front volute tongue near the air outlet channel is the air outlet end, the end of the front volute tongue near the air inlet is the air inlet end, and the direction from the air inlet end to the air outlet end is the first direction.

[0013] The air inlet end has a concave-convex structure so that the width of the front volute tongue is different in the axial direction of the impeller. The concave-convex structure is a protrusion or a groove, and the width of the front volute tongue is the extension dimension of the front volute tongue in the first direction.

[0014] According to some embodiments of the present invention, the width dimension of the concave-convex structure in the first direction is d, the width dimension of the anterior cochlear tongue in the first direction is h, and the ratio of d to h ranges from 0 to 50%.

[0015] According to some embodiments of the present invention, there are multiple concave and convex structures, and the multiple concave and convex structures are non-uniformly distributed along the axial direction of the wind turbine.

[0016] According to some embodiments of the present invention, the width dimension of the concave-convex structure in the axial direction of the wind turbine is c, the length of the wind turbine in the axial direction is L, and the ratio of c to L ranges from 1% to 50%.

[0017] According to some embodiments of the present invention, the volute tooth structure includes a plurality of volute teeth arranged at intervals along the axial direction of the impeller. The plurality of volute teeth are divided into multiple groups of volute tooth sets arranged at intervals along the axial direction of the impeller. Each group of volute tooth sets includes a plurality of volute teeth arranged at intervals along the axial direction of the impeller. The distance between two adjacent groups of volute teeth in the axial direction of the impeller is greater than the distance between any two adjacent volute teeth in the same group of volute teeth in the axial direction of the impeller. There is a toothless area between two adjacent groups of volute tooth sets. In the first direction, the concave-convex structure is arranged opposite to the toothless area.

[0018] 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

[0019] 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:

[0020] Figure 1 This is a cross-sectional view of a partial structure of an air conditioner according to some embodiments of the present invention;

[0021] Figure 2 yes Figure 1 A cross-sectional view of a portion of the structure of the air duct assembly in an air conditioner.

[0022] Figure 3 yes Figure 2 A schematic diagram of a portion of the structure of the air duct volute in the air duct assembly;

[0023] Figure 4 yes Figure 3 Enlarged view of point A in the middle;

[0024] Figure 5 yes Figure 3 A schematic diagram of another angle of the structure of the air duct volute in the middle;

[0025] Figure 6 yes Figure 3 A three-dimensional schematic diagram of part of the structure of the air duct volute in the middle;

[0026] Figure 7 yes Figure 6 Enlarged view of point B in the middle;

[0027] Figure 8 This is a measured noise spectrum diagram of the entire air conditioner unit in related technologies;

[0028] Figure 9 This is a measured noise spectrum diagram of the entire air conditioner according to some embodiments of the present invention.

[0029] Figure label:

[0030] 100. Air conditioner;

[0031] 10. Housing assembly; 11. Air inlet; 12. Air outlet; 13. Air outlet duct;

[0032] 20. Heat exchanger assembly;

[0033] 30. Duct assembly; 3a. Impeller; 3b. Duct housing; 311. Duct; 32. Front volute tongue; 321. Volute tongue tooth structure; 3211. Volute tongue teeth; 3212. Volute tongue tooth assembly; 322. Air inlet end; 3221. Concave-convex structure; 323. Air outlet end; 324. Toothless area. Detailed Implementation

[0034] 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.

[0035] The following is for reference. Figures 1-7 This invention describes an air conditioner 100 according to an embodiment of the present invention.

[0036] Reference Figures 1-4 According to an embodiment of the present utility model, the air conditioner 100 includes a casing assembly 10, a heat exchanger assembly 20, and an air duct assembly 30. For example, the air conditioner 100 is a split-type air conditioner 100, which is divided into an indoor air conditioner unit and an outdoor air conditioner unit. The indoor air conditioner unit includes a casing assembly 10, a heat exchanger assembly 20, and an air duct assembly 30.

[0037] The housing assembly 10 has an air inlet 11 and an air outlet 12. The heat exchanger assembly 20 is disposed within the housing assembly 10. The air duct assembly 30 is disposed within the housing assembly 10 and includes an air duct volute 3b and a fan 3a. The air duct volute 3b has an air duct 311, which connects the air inlet 11 and the air outlet 12. The fan 3a is located within the air duct 311. For example, when the air conditioner 100 is working, the fan 3a can drive the airflow through the air inlet 11 to the heat exchanger assembly. After heat exchange by the heat exchanger assembly, the air can flow through the air duct 311 to the air outlet 12, and then be blown out of the room through the air outlet 12 to cool or heat the room.

[0038] The volute 3b includes a front volute tongue 32, which includes a volute tongue tooth structure 321. The volute tongue tooth structure 321 is located on the side of the front volute tongue 32 close to the air duct 311 and protrudes from the inner wall surface of the front volute tongue 32 toward the air duct 311. The volute tongue tooth structure 321 is non-uniformly distributed in the axial direction of the impeller 3a.

[0039] The front volute tongue 32 guides the airflow entering the air duct 311, directing the airflow within the air duct 311 towards the air outlet 12. The volute tongue tooth structure 321, located on the side of the front volute tongue 32 closest to the air duct 311 and protruding from the inner wall of the front volute tongue 32 towards the air duct 311, guides the airflow entering the air duct 311. Furthermore, the volute tongue tooth structure 321 is non-uniformly distributed along the axial direction of the impeller 3a; for example, there may be differences in the protrusion height, density, or shape of the volute tongue tooth structure 321 along the axial direction of the impeller 3a. This ensures that the airflow is guided along the axial direction of the impeller 3a. When the evenly distributed volute tooth structure 321 is used, it can disperse the distorted flow field generated by the airflow in the air duct 311 during the flow process, that is, the turbulent area where the airflow velocity and pressure distribution are uneven. This reduces the superposition of the high-order harmonics of the pressure pulsation generated by the vortex shedding in the distorted flow field, thereby avoiding high-frequency abnormal noise caused by the superposition of the phases of the high-order harmonics of aerodynamic noise. This can effectively reduce aerodynamic noise, reduce the abnormal noise of the air duct 311, improve the sound quality of the air supply of the air duct 311, and enhance the user's experience.

[0040] For example, if there is a large deviation in the manufacturing process of the heat exchanger assembly 20 of the air conditioner 100, such as uneven fin spacing or large deviation in the opening height of the heat exchanger, or localized blockage of the air intake filter of the air conditioner 100 due to dust accumulation, or low manufacturing precision of the impeller 3a, such as fluctuation in the misalignment angle of the impeller 3a during mass production, flow field distortion will occur inside the air duct 311. The pressure pulsation generated by the vortex shedding in the distorted flow field will be superimposed under the guiding effect of the volute tongue tooth structure 321 evenly distributed along the axial direction, thereby inducing high-frequency noise. This high-frequency noise will reduce the user's user experience.

[0041] By non-uniformly distributing the volute tongue tooth structure 321 along the axial direction of the impeller 3a, when the internal flow field is distorted, the volute tongue tooth structure 321 on the front volute tongue 32 is non-uniformly distributed along the axial direction of the impeller 3a, which can disperse the distorted flow field, prevent the distorted flow field from propagating along the flow direction of the airflow, avoid the superposition of pressure pulsations caused by vortex shedding, and reduce the superposition of high-order harmonics of pressure pulsations generated by vortex shedding in the distorted flow field. This can also avoid the high-frequency abnormal noise caused by the superposition of high-order harmonic phases of aerodynamic noise, increase the fault tolerance of the heat exchanger assembly 20 of the air conditioner 100, and also help improve the air supply sound quality of the duct 311.

[0042] According to the embodiment of the present invention, the air conditioner 100 has a volute tongue tooth structure 321 provided in the front volute tongue 32 of the air duct volute 3b. The volute tongue tooth structure 321 protrudes from the inner wall of the front volute tongue 32 towards the air duct 311 and is non-uniformly distributed in the axial direction of the impeller 3a. This can reduce airflow turbulence. For example, it can disperse the distorted flow field in the air duct 311, so that the high-order harmonics of the pressure pulsation generated by the eddy shedding in the distorted flow field are weakened by mutual superposition. This avoids high-frequency abnormal noise caused by the mutual superposition of the phases of the high-order harmonics of aerodynamic noise. This can effectively reduce aerodynamic noise, reduce abnormal noise in the air duct 311, improve the sound quality of the air supply in the air duct 311, and enhance the user's experience.

[0043] Reference Figures 3-7 According to some embodiments of the present invention, the volute tongue structure 321 includes a plurality of volute tongue teeth 3211 arranged at intervals along the axial direction of the impeller 3a. The plurality of volute tongue teeth 3211 are not uniformly distributed in the axial direction of the impeller 3a, or at least some of the volute tongue teeth 3211 have different maximum protrusion heights. The difference in the maximum protrusion height of at least some of the volute tongue teeth 3211 can include the following situations: for example, some of the volute tongue teeth 3211 may have different maximum protrusion heights; or, for example, all of the volute tongue teeth 3211 may have different maximum protrusion heights.

[0044] For example, the non-uniform distribution of multiple volute teeth 3211 in the axial direction of the impeller 3a can be in areas with strong airflow disturbance within the duct 311. The large number of volute teeth 3211 and the small spacing between adjacent volute teeth 3211 in the axial direction of the impeller 3a can enhance the dispersing effect on turbulent airflow.

[0045] For example, at least some of the volute teeth 3211 have different maximum protrusion heights, that is, the maximum protrusion height of the volute teeth 3211 protruding from the inner wall of the front volute 32 varies. For example, the volute teeth 3211 with larger maximum protrusion height have a more obvious effect on airflow diversion and can enhance the effect of dispersing turbulent airflow in areas with strong airflow disturbance in the air duct 311.

[0046] By distributing multiple volute teeth 3211 non-uniformly in the axial direction of the impeller 3a, or by varying the maximum protrusion height of some of the volute teeth 3211, the generation location of vortices or the shedding time of vortices can be made more dispersed when the airflow passes through the multiple volute teeth 3211 distributing non-uniformly in the axial direction of the impeller 3a. This can effectively reduce or avoid the synchronous superposition of high-order harmonics of pressure pulsation generated by vortex shedding, weaken the generation of abnormal noise, and enhance the overall noise reduction effect of the volute tooth structure 321.

[0047] It should be explained that the maximum protrusion height of the cochlear tongue tooth 3211 refers to the vertical distance between the farthest point of the cochlear tongue tooth 3211 protruding from the inner wall surface of the anterior cochlear tongue 32 and the inner wall surface of the anterior cochlear tongue 32.

[0048] In the description of this utility model, "multiple" means two or more.

[0049] Reference Figures 2-4 According to some embodiments of this utility model, the difference in the maximum protrusion height of any two volute tongue teeth 3211 is Δb, the diameter of the impeller 3a is D, and the absolute value of the ratio of Δb to D ranges from 0 to 4%. For example, the absolute value of the ratio of Δb to D can be 0, 0.5%, 1%, 1.85%, 2.5%, 3.4%, 4%, etc.

[0050] By setting the absolute value of the ratio of the difference Δb between the maximum protrusion heights of any two volute tongue teeth 3211 to the diameter D of the impeller 3a to be within the range of 0 to 4%, the overall noise reduction effect and air delivery efficiency of the volute tongue tooth structure 321 can be well balanced. This ensures that the multiple volute tongue teeth 3211, which are non-uniformly distributed along the axial direction of the impeller 3a, have a strong noise reduction effect, while avoiding the possibility of airflow obstruction due to excessively high maximum protrusion heights of the volute tongue teeth 3211, thus avoiding the possibility of reduced air delivery efficiency due to airflow obstruction.

[0051] Reference Figures 3-7 According to some embodiments of the present invention, a plurality of volute teeth 3211 are divided into a plurality of volute tooth groups 3212 arranged at intervals along the axial direction of the impeller 3a. Each volute tooth group 3212 includes a plurality of volute teeth 3211 arranged at intervals along the axial direction of the impeller 3a. The distance between two adjacent volute tooth groups 3212 in the axial direction of the impeller 3a is greater than the distance between any two adjacent volute teeth 3211 in the same volute tooth group 3212 in the axial direction of the impeller 3a.

[0052] By making the spacing between two adjacent volute tooth sets 3212 in the axial direction of the impeller 3a greater than the spacing between any two adjacent volute tooth sets 3211 in the same set of volute tooth sets 3212 in the axial direction of the impeller 3a, a non-uniform distribution of the volute tooth structure 321 in the axial direction of the impeller 3a can be achieved. By making the spacing between two adjacent volute tooth sets 3211 in the same set of volute tooth sets 3212 smaller in the axial direction of the impeller 3a, the relatively densely arranged volute tooth sets 3211 can effectively intervene in the airflow in local areas, which can enhance the overall noise reduction effect of the volute tooth structure 321. Furthermore, by making the spacing between two adjacent volute tooth sets 3212 larger in the axial direction of the impeller 3a, the airflow can pass more smoothly between the two adjacent volute tooth sets 3212, which is beneficial to improving the air supply efficiency.

[0053] For example, in areas with more vortices within the air duct 311, a dense set of volute teeth 3212 can be installed to effectively disperse the airflow and reduce noise generation. In areas with relatively stable airflow, the larger spacing between two adjacent volute teeth 3212 allows the airflow to flow more smoothly from the area between the two adjacent volute teeth 3212 to the air outlet 12.

[0054] Reference Figures 3-7 According to some embodiments of this utility model, the distance between two adjacent volute tooth sets 3212 in the axial direction of the impeller 3a is 'a', the length of the impeller 3a in the axial direction is 'L', and the ratio of 'a' to 'L' ranges from 1% to 50%. For example, the ratio of the distance 'a' between two adjacent volute tooth sets 3212 in the axial direction of the impeller 3a to the length 'L' of the impeller 3a in the axial direction can be 1%, 10%, 25%, 30%, 45%, 50%, etc.

[0055] By setting the ratio of the distance 'a' between two adjacent volute tooth sets 3212 in the axial direction of the impeller 3a to the length L of the impeller 3a in the axial direction to a range of 1% to 50%, the overall noise reduction effect and air supply efficiency of the volute tooth structure 321 can be well balanced. While the volute tooth structure 321 effectively reduces aerodynamic noise and lowers the abnormal noise of the air duct 311, the larger distance between two adjacent volute tooth sets 3212 in the axial direction of the impeller 3a allows the airflow to flow more smoothly from the area between the two adjacent volute tooth sets 3212 to the air outlet 12, resulting in better overall air supply efficiency for the volute tooth structure 321.

[0056] Reference Figures 3-7According to some embodiments of this utility model, in the same group of volute tongue teeth 3212, any two adjacent volute tongue teeth 3211 are spaced at the same distance along the axial direction of the impeller 3a. This allows multiple volute tongue teeth 3211 in the same group of volute tongue teeth 3212 to be equidistantly arranged in the axial direction of the impeller 3a. The multiple volute tongue teeth 3211 equidistantly arranged in the group can relatively effectively disperse the local vortices in the airflow flowing through the volute tongue teeth 3212, which can effectively reduce or avoid the synchronous superposition of high-order harmonics of pressure pulsation caused by the shedding of vortices, weaken the generation of abnormal noise, and thus improve the sound quality of the air supply in the duct 311.

[0057] Reference Figures 3-7 According to some embodiments of the present invention, in the same group of cochlear teeth 3212, at least some of the cochlear teeth 3211 are the same. The at least some of the cochlear teeth 3211 being the same can include the following situations: for example, some of the cochlear teeth 3211 may be the same; or, for another example, all of the cochlear teeth 3211 may be the same.

[0058] By making at least some of the worm tongue teeth 3211 in the same set of worm tongue teeth 3212 identical, the worm tongue tooth structure 321 can be made easier to manufacture. For example, the same worm tongue teeth 3211 can share the same set of molds and adopt unified processing standards, reducing the types of parts and facilitating mass production, thereby improving the overall production efficiency of the worm tongue tooth structure 321.

[0059] Reference Figures 3-7 According to some embodiments of this utility model, in the same group of volute tooth sets 3212, the distance between two adjacent volute tooth sets 3211 in the axial direction of the impeller 3a is w, and the distance between two adjacent volute tooth sets 3212 in the axial direction of the impeller 3a is a, and the ratio of a to w ranges from 5 to 20. For example, the ratio of the distance a between two adjacent volute tooth sets 3212 in the axial direction of the impeller 3a to the distance w between two adjacent volute tooth sets 3211 in the same group of volute tooth sets 3212 in the axial direction of the impeller 3a can be 5, 8, 12, 15, 17, 20, etc.

[0060] By setting the ratio of the distance 'a' between two adjacent volute tooth sets 3212 in the axial direction of the impeller 3a to the distance 'w' between two adjacent volute tooth sets 3211 in the same set of volute tooth sets 3212 in the axial direction of the impeller 3a to a range of 5 to 20, the two adjacent volute tooth sets 3211 in the same set of volute tooth sets 3212 are arranged relatively densely, while the distance between the two adjacent volute tooth sets 3212 in the axial direction of the impeller 3a is relatively large. This results in a relatively obvious non-uniform distribution of the volute tooth structure 321 in the axial direction of the impeller 3a, which strongly intervenes in the airflow. In particular, it can enhance the dispersing effect of turbulent airflow in areas with strong airflow disturbance in the duct 311, effectively reducing noise in the duct 311 and improving the overall noise reduction effect of the volute tooth structure 321.

[0061] Reference Figures 3-7 According to some embodiments of the present invention, the housing assembly 10 forms an air outlet channel 13. The air outlet channel 13 is used to connect the ventilation duct 311 and the air outlet 12 and is located on the downstream side of the impeller 3a. For example, when the air conditioner 100 is working, the impeller 3a can drive the airflow through the air inlet 11 to flow into the heat exchanger component. The air after heat exchange by the heat exchanger component can flow into the air outlet channel 13 through the air duct 311 and then be blown out into the room through the air outlet 12 to cool or heat the room.

[0062] The end of the front volute 32 near the air outlet 13 is the air outlet 323, and the end of the front volute 32 near the air inlet 11 is the air inlet end 322. The direction from the air inlet end 322 to the air outlet 323 is the first direction (for example, refer to the e1 direction in the attached figure). The air inlet end 322 has a concave-convex structure 3221 so that the width dimension of the front volute 32 is different in the axial direction of the impeller 3a. The concave-convex structure 3221 is a protrusion or a groove, and the width dimension of the front volute 32 is the extension dimension of the front volute 32 in the first direction.

[0063] The air inlet end 322 of the front volute 32 has a concave-convex structure 3221, which can be a protrusion or a groove. For example, a part of the front volute 32 extends toward the air inlet end 322 to form a protrusion, or a part of the front volute 32 is recessed toward the air outlet section to form a groove. This makes the width of the front volute 32 different in the axial direction of the impeller 3a, which can make the guiding effect of the front volute 32 on the airflow in the axial direction of the impeller 3a different. This can balance the airflow field distribution near the air inlet end 322, reduce airflow turbulence, and thus help reduce noise in the air duct 311, improve the air supply sound quality of the air duct 311, and improve the user experience.

[0064] Reference Figures 3-7According to some embodiments of the present invention, the width dimension of the concave-convex structure 3221 in the first direction is d, and the width dimension of the front volute tongue 32 in the first direction is h, and the ratio of d to h ranges from 0 to 50%. For example, the ratio of the width dimension d of the concave-convex structure 3221 in the first direction to the width dimension h of the front volute tongue 32 in the first direction can be 0, 10%, 25%, 30%, 45%, 50%, etc.

[0065] By setting the ratio of the width dimension d of the concave-convex structure 3221 in the first direction to the width dimension h of the front volute tongue 32 in the first direction to be in the range of 0 to 50%, the width dimension of the concave-convex structure 3221 in the first direction can be larger, so as to effectively balance the airflow field distribution near the air inlet end 322, reduce airflow turbulence, thereby effectively reducing noise in the air duct 311 and improving the air supply sound quality of the air duct 311.

[0066] Reference Figures 3-7 According to some embodiments of this utility model, there are multiple concave-convex structures 3221, which are non-uniformly distributed along the axial direction of the impeller 3a. By non-uniformly distributing the concave-convex structures 3221 along the axial direction of the impeller 3a, in the event of distortion in the internal flow field, the non-uniform distribution of the concave-convex structures 3221 on the front volute 32 along the axial direction of the impeller 3a can disperse the distorted flow field, prevent the distorted flow field from propagating along the airflow direction, and avoid the superposition of pressure pulsations caused by vortex shedding. This weakens the superposition of high-order harmonics of pressure pulsations generated by vortex shedding in the distorted flow field, thereby avoiding high-frequency abnormal noise caused by the superposition of high-order harmonic phases of aerodynamic noise. This enhances the fault tolerance of the heat exchanger assembly 20 of the air conditioner 100 and also helps improve the airflow sound quality of the duct 311.

[0067] Reference Figures 3-7 According to some embodiments of this utility model, the width dimension of the concave-convex structure 3221 in the axial direction of the impeller 3a is c, and the length of the impeller 3a in the axial direction is L. The ratio of c to L ranges from 1% to 50%. For example, the ratio of the width dimension c of the concave-convex structure 3221 in the axial direction of the impeller 3a to the length L of the impeller 3a in the axial direction can be 1%, 10%, 25%, 30%, 45%, 50%, etc.

[0068] By using a ratio of 1% to 50% between the width c of the concave-convex structure 3221 in the axial direction and the length L of the impeller 3a in the axial direction, the width of the concave-convex structure 3221 in the axial direction can be made larger, so as to better regulate the airflow field near the air inlet end 322, reduce airflow turbulence, thereby effectively reducing noise in the air duct 311 and improving the air supply sound quality of the air duct 311.

[0069] Reference Figures 3-7 According to some embodiments of the present invention, the volute tooth structure 321 includes a plurality of volute teeth 3211 arranged at intervals along the axial direction of the impeller 3a. The plurality of volute teeth 3211 are divided into a plurality of volute tooth groups 3212 arranged at intervals along the axial direction of the impeller 3a. Each group of volute teeth 3212 includes a plurality of volute teeth 3211 arranged at intervals along the axial direction of the impeller 3a. The distance between two adjacent volute tooth groups 3212 in the axial direction of the impeller 3a is greater than the distance between any two adjacent volute teeth 3211 in the same group of volute tooth groups 3212 in the axial direction of the impeller 3a. There is a toothless area 324 between two adjacent groups of volute tooth groups 3212. In the first direction, the concave-convex structure 3221 is arranged opposite to the toothless area 324.

[0070] The spacing between the multiple volute teeth 3211 within each group of volute teeth 3212 along the axial direction of the impeller 3a is small, while the spacing between two adjacent groups of volute teeth 3212 is larger. Furthermore, there is a toothless area 324 between two adjacent groups of volute teeth 3212, allowing airflow to flow more smoothly towards the outlet 12. The toothless area 324 between two adjacent groups of volute teeth 3212 and the multiple volute teeth 3211 spaced apart along the axial direction of the impeller 3a within each group of volute teeth 3212... Together, the 11 structures form an alternating dense and sparse layout to effectively disperse turbulent airflow in areas with strong airflow disturbance within the air duct 311, reducing noise within the air duct 311. Furthermore, in the first direction, the concave-convex structure 3221 is positioned opposite to the toothless area 324, which allows the concave-convex structure 3221 to regulate the flow field of the airflow passing through the toothless area 324, reducing airflow turbulence and thus effectively reducing noise within the air duct 311 and improving the sound quality of the air supply in the air duct 311.

[0071] In some embodiments, in a first direction, the concave-convex structure 3221 is offset from the toothless region 324.

[0072] The following reference Figures 1-7 This invention describes an air conditioner 100 according to some embodiments of the present invention.

[0073] Reference Figure 1 , Figure 3 and Figure 4In this embodiment, the air conditioner 100 includes a housing assembly 10, a heat exchanger assembly 20, and an air duct assembly 30. The housing assembly 10 has an air inlet 11 and an air outlet 12. The heat exchanger assembly 20 is disposed within the housing assembly 10. The air duct assembly 30 is disposed within the housing assembly 10 and includes an air duct volute 3b and a fan wheel 3a. The air duct volute 3b has an air duct 311 for connecting the air inlet 11 and the air outlet 12. The fan wheel 3a is located within the air duct 311. The air duct volute 3b includes a front volute tongue 32, which includes a volute tongue tooth structure 321. The volute tongue tooth structure 321 is located on the side of the front volute tongue 32 closest to the air duct 311 and protrudes towards the air duct 311 from the inner wall surface of the front volute tongue 32. The volute tongue tooth structure 321 is non-uniformly distributed in the axial direction of the fan wheel 3a.

[0074] The volute tooth structure 321 includes multiple volute teeth 3211 arranged at intervals along the axial direction of the impeller 3a. The multiple volute teeth 3211 are non-uniformly distributed in the axial direction of the impeller 3a. The difference in the maximum protrusion height of any two volute teeth 3211 is Δb. The diameter of the impeller 3a is D. The absolute value of the ratio of Δb to D ranges from 0 to 4%.

[0075] Multiple volute teeth 3211 are divided into multiple groups of volute teeth 3212 arranged at intervals along the axial direction of the impeller 3a. Each group of volute teeth 3212 includes multiple volute teeth 3211 arranged at intervals along the axial direction of the impeller 3a. The distance between two adjacent groups of volute teeth 3212 in the axial direction of the impeller 3a is greater than the distance between any two adjacent volute teeth 3211 in the same group of volute teeth 3212 in the axial direction of the impeller 3a.

[0076] The distance between two adjacent volute tooth sets 3212 in the axial direction of the impeller 3a is a, the length of the impeller 3a in the axial direction is L, and the ratio of a to L ranges from 1% to 50%.

[0077] In the same set of volute teeth 3212, the spacing between any two adjacent volute teeth 3211 in the axial direction of the impeller 3a is the same, at least some of the volute teeth 3211 are the same, and the spacing between two adjacent volute teeth 3211 in the axial direction of the impeller 3a is w, the spacing between two adjacent sets of volute teeth 3212 in the axial direction of the impeller 3a is a, and the ratio of a to w ranges from 5 to 20.

[0078] The housing assembly 10 forms an air outlet channel 13, which connects the ventilation duct 311 and the air outlet 12 and is located on the downstream side of the impeller 3a. The end of the front volute 32 near the air outlet channel 13 is the air outlet end 323, and the end of the front volute 32 near the air inlet 11 is the air inlet end 322. The direction from the air inlet end 322 to the air outlet end 323 is the first direction. The air inlet end 322 forms a concave-convex structure 3221 so that the width dimension of the front volute 32 is different in the axial direction of the impeller 3a. There are multiple concave-convex structures 3221, and the multiple concave-convex structures 3221 are non-uniformly distributed along the axial direction of the impeller 3a. The concave-convex structure 3221 is a protrusion or a groove. The width dimension of the front volute tongue 32 is the extension dimension of the front volute tongue 32 in the first direction. The width dimension of the concave-convex structure 3221 in the first direction is d, and the width dimension of the front volute tongue 32 in the first direction is h. The ratio of d to h ranges from 0% to 50%. The width dimension of the concave-convex structure 3221 in the axial direction of the impeller 3a is c. The length of the impeller 3a in the axial direction is L. The ratio of c to L ranges from 1% to 50%.

[0079] The volute tooth structure 321 includes a plurality of volute teeth 3211 arranged at intervals along the axial direction of the impeller 3a. The plurality of volute teeth 3211 are divided into a plurality of volute tooth groups 3212 arranged at intervals along the axial direction of the impeller 3a. Each volute tooth group 3212 includes a plurality of volute teeth 3211 arranged at intervals along the axial direction of the impeller 3a. The distance between two adjacent volute tooth groups 3212 in the axial direction of the impeller 3a is greater than the distance between any two adjacent volute teeth 3211 in the same volute tooth group 3212 in the axial direction of the impeller 3a. There is a toothless area 324 between two adjacent volute tooth groups 3212. In the first direction, the concave-convex structure 3221 is arranged opposite to the toothless area 324.

[0080] Reference Figure 8 and Figure 9 , Figure 8 The above is a measured noise spectrum diagram of the entire air conditioner unit 100 in the relevant technology. Figure 9 The above is a measured noise spectrum diagram of the air conditioner 100 according to some embodiments of the present invention. The horizontal axis of the diagram represents the frequency in Hertz (Hz), and the vertical axis represents the decibel (dB), which is used to measure the sound intensity.

[0081] like Figure 8 As shown, when the air conditioner 100 is running, an abnormal peak appears near 870 Hz (f = NZ / 60; N: revolutions per minute (rpm) Z: number of fan blades), which is perceived as a sharp, high-frequency "whooshing" noise in actual listening. At this time, when the cross-flow fan 3a sweeps across the volute tooth structure 321 of the front volute tongue 32, the pressure pulsations caused by the large-scale vortex shedding near the volute tooth structure 321 of the front volute tongue 32 are superimposed, forming the high-frequency noise.

[0082] like Figure 9 As shown, when the air conditioner 100 is running, the abnormal peak near 870HZ (f=NZ / 60; N: revolutions (rpm) Z: number of fan blades) disappears. The actual sound quality of the air supply is soft and there is no abnormal noise. The non-uniformly distributed volute tooth structure 321 along the axial direction of the impeller 3a weakens the high-order harmonics of the pressure pulsation generated by the vortex shedding in the distorted flow field, resulting in better air supply sound quality.

[0083] Table 1 shows the test results of air volume and noise of air conditioner 100 in related technologies and some embodiments of the present invention at different speeds.

[0084] Table 1

[0085]

[0086] As can be seen from Table 1, at multiple speeds, the air conditioner 100 of some embodiments of this utility model, when operating at the same speed, has a slightly increased air volume and a noise level reduced by about 1 dB compared to the air conditioner 100 in the related art, effectively reducing the noise of the air duct 311.

[0087] 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.

[0088] In the description of this utility model, "first feature" and "second feature" may include one or more of the features.

[0089] 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.

[0090] 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.

[0091] 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.

[0092] 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. An air conditioner, characterized in that, include: The housing assembly has an air inlet and an air outlet; A heat exchanger assembly is disposed within the housing assembly; A duct assembly is disposed within the housing assembly and includes a duct volute and a fan impeller. The duct volute has a duct for connecting the air inlet and the air outlet. The fan impeller is located within the duct. The duct volute includes a front volute tongue, which includes volute tongue teeth. The volute tongue teeth are located on the side of the front volute tongue closest to the duct and protrude from the inner wall of the front volute tongue toward the duct. The volute tongue teeth are non-uniformly distributed in the axial direction of the fan impeller.

2. The air conditioner according to claim 1, characterized in that, The volute tooth structure includes a plurality of volute teeth spaced apart along the axial direction of the wind turbine. The plurality of volute teeth are not uniformly distributed in the axial direction of the wind turbine, or at least some of the volute teeth have different maximum protrusion heights.

3. The air conditioner according to claim 2, characterized in that, The difference in the maximum protrusion height of any two of the volute tongue teeth is Δb, the diameter of the impeller is D, and the absolute value of the ratio of Δb to D ranges from 0 to 4%.

4. The air conditioner according to claim 2, characterized in that, The plurality of volute teeth are divided into multiple groups of volute teeth arranged at intervals along the axial direction of the impeller. Each group of volute teeth includes a plurality of volute teeth arranged at intervals along the axial direction of the impeller. The distance between two adjacent groups of volute teeth in the axial direction of the impeller is greater than the distance between any two adjacent volute teeth in the same group of volute teeth in the axial direction of the impeller.

5. The air conditioner according to claim 4, characterized in that, The distance between two adjacent volute tooth sets in the axial direction of the wind turbine is a, the length of the wind turbine in the axial direction is L, and the ratio of a to L ranges from 1% to 50%.

6. The air conditioner according to claim 4, characterized in that, In the same group of volute tongue teeth, the spacing between any two adjacent volute tongue teeth in the axial direction of the impeller is the same; and / or, in the same group of volute tongue teeth, at least some of the volute tongue teeth are the same.

7. The air conditioner according to claim 4, characterized in that, In the same group of volute teeth, the distance between two adjacent volute teeth in the axial direction of the wind turbine is w, and the distance between two adjacent volute teeth groups in the axial direction of the wind turbine is a, and the ratio of a to w ranges from 5 to 20.

8. The air conditioner according to claim 1, characterized in that, The housing assembly forms an air outlet channel, which is used to connect the air duct and the air outlet and is located on the downstream side of the impeller. The end of the front volute tongue near the air outlet channel is the air outlet end, and the end of the front volute tongue near the air inlet is the air inlet end. The direction from the air inlet end to the air outlet end is the first direction. The air inlet end has a concave-convex structure so that the width of the front volute tongue is different in the axial direction of the impeller. The concave-convex structure is a protrusion or a groove, and the width of the front volute tongue is the extension dimension of the front volute tongue in the first direction.

9. The air conditioner according to claim 8, characterized in that, The width dimension of the concave-convex structure in the first direction is d, and the width dimension of the anterior cochlear tongue in the first direction is h, with the ratio of d to h ranging from 0% to 50%.

10. The air conditioner according to claim 8, characterized in that, The concave-convex structure is multiple, and the multiple concave-convex structures are non-uniformly distributed along the axial direction of the wind turbine.

11. The air conditioner according to claim 8, characterized in that, The width dimension of the concave-convex structure in the axial direction of the wind turbine is c, and the length of the wind turbine in the axial direction is L. The ratio of c to L ranges from 1% to 50%.

12. The air conditioner according to claim 8, characterized in that, The volute tooth structure includes a plurality of volute teeth arranged at intervals along the axial direction of the impeller. The plurality of volute teeth are divided into multiple groups of volute tooth sets arranged at intervals along the axial direction of the impeller. Each group of volute tooth sets includes a plurality of volute teeth arranged at intervals along the axial direction of the impeller. The distance between two adjacent groups of volute teeth in the axial direction of the impeller is greater than the distance between any two adjacent volute teeth in the same group of volute teeth in the axial direction of the impeller. There is a toothless area between two adjacent groups of volute tooth sets. In the first direction, the concave-convex structure is arranged opposite to the toothless area.

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