Fan assemblies and air conditioners

Abstract

The present application provides a fan assembly and an air conditioner, the fan assembly includes a volute casing including a casing body and a volute tongue connected to an opening of the casing body, and a wind wheel at least partially installed in the casing body, the volute tongue includes a diverging section and a vortex section, the vortex sections are located on both sides of the diverging section along the axial direction of the wind wheel, and the vortex section is higher than the diverging section. The present application optimizes the shape of the volute casing, the volute tongue includes a vortex section and a diverging section used together, the speed of the airflow at the position of the vortex section is reduced, the uniformity of the airflow of the fan assembly is ensured, and the operation performance of the fan assembly is effectively improved.

Description

[Technical field]

[0001] This application claims priority to a Chinese patent application bearing application number "202121538970.9" and entitled "Fan Assembly and Air Conditioner" filed with the State Intellectual Property Office of the People's Republic of China on July 7, 2021, the entire contents of which are incorporated herein by reference.

[0002] The present application relates to the technical field of fans, and more particularly to fan assemblies and air conditioners. [Background technology]

[0003] The fan assembly is a core component of an air conditioner, and its performance determines the size, performance, and sound quality of the air conditioner. In the related art, the airflow speed at the outlet of the fan assembly is different (the flow speed at the middle part is faster than that at the periphery), which increases the noise of the fan assembly and the air conditioner and affects the air blowing efficiency of the fan. Summary of the Invention [Problem to be solved by the invention]

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. [Means for solving the problem]

[0005] To this end, in a first aspect of the present application, a fan assembly is provided.

[0006] In a second aspect of the present application, an air conditioner is provided.

[0007] A first aspect of the present application provides a fan assembly including a volute casing including a casing body and a volute tongue connected to an opening of the casing body, and a wind wheel at least partially installed within the casing body, the volute tongue including a diverging section and a vortex section, the vortex sections being located on both sides of the diverging section along an axial direction of the wind wheel, and the vortex sections being higher than the diverging section.

[0008] The fan assembly proposed in this application includes a volute casing and a wind wheel, in which the volute casing includes a casing body and a volute tongue connected to an opening of the casing body, and the wind wheel is at least partially installed in the casing body. During operation of the fan assembly, the wind wheel can rotate to draw airflow from outside into the casing body, and the airflow is pressurized by the wind wheel and then discharged through the volute tongue.

[0009] In particular, during operation of the fan assembly, the distribution of the airflow discharged from the wind wheel is non-uniform, and the closer to the center position in the axial direction of the wind wheel, the greater the air volume, and the faster the airflow velocity is. Therefore, the present application optimizes the shape of the volute, which includes a diverging section and a swirling section, and ensures that the swirling section is set higher than the diverging section, so that the relative position of the diverging section is lower. In this way, the swirling area at the position of the swirling section can be effectively enlarged, and thus the airflow velocity at the position of the swirling section can be reduced, making the overall flow velocity of the fan assembly relatively uniform.

[0010] Also, along the axial direction of the wind wheel, the vortex section is located on both sides of the divergent section, and the divergent section is located in the middle, ensuring that the distribution of the divergent section and the vortex section is located to match the airflow distribution exiting the wind wheel. The divergent section is located lower than the vortex section so that it can be used to increase the vortex area at that location and further reduce the airflow velocity at that location. In this way, the cooperation of the vortex section and the divergent section ensures uniformity of the airflow from the fan assembly.

[0011] In this way, for the same operating noise, the fan assembly proposed in the present application can deliver a larger air volume and meet the air conditioning needs of a larger space. Correspondingly, for the same air volume, the fan assembly proposed in the present application has a lower operating noise, improving the comfort of the fan assembly. Correspondingly, for the same air volume and the same operating noise, the fan assembly proposed in the present application has a smaller volume and can meet the requirements of lower cost or more diverse installation space.

[0012] Therefore, the present application optimizes the shape of the volute casing, and the volute tongue includes a vortex section and a diverging section used in cooperation with each other to reduce the airflow velocity at the position of the vortex section, ensure the uniformity of the airflow from the fan assembly, and effectively improve the operating performance of the fan assembly.

[0013] According to the fan assembly of the above technical solution of the present application, it can further have the following additional technical features:

[0014] In the above technical solution, the spiral tongue further includes a tongue body, the tongue body is provided with a diverging portion and a vortex portion, and the diverging portion is recessed into the tongue body.

[0015] In some possible designs, the depth of the divergent section in the middle is greater than the depth of both ends along the axial direction of the windwheel.

[0016] In some possible designs, the divergent section may include one circular arc or may include multiple connected circular arcs when cut along the axial direction of the windwheel.

[0017] In some possible designs, when the divergent section is cut along the axial direction of the windwheel, the height of the divergent section increases synchronously from the middle to both ends of the divergent section.

[0018] In some possible designs, the height of the diverging section gradually increases in the wind direction of the volute casing.

[0019] In some possible design alternatives, when the divergent section is cut along the radial direction of the wind wheel, the divergent section includes a straight line, and a first included angle between the straight line and a horizontal plane is greater than 8° and less than or equal to 12°.

[0020] In some possible design alternatives, when the diverging section is cut along the radial direction of the wind wheel, the diverging section includes an arc line, and a second included angle between a tangent to the arc line at one end closer to the wind wheel and the horizontal plane is greater than 8° and less than or equal to 12°.

[0021] In some possible designs, the divergent section is coupled to the inner wall of the casing body 104 .

[0022] In some possible designs, a fillet is provided between the divergent section and the inner wall of the casing body 104.

[0023] In some possible designs, the ratio of the maximum depth of the divergent section to the axial dimension of the volute is greater than or equal to 0.05 and less than or equal to 0.1.

[0024] In some possible designs, the volute further includes a recessed platform located at the vortex section and on either side of the divergent section.

[0025] In some possible design alternatives, the wind inlets of the volute casing are located on both sides of the wind wheel along the axial direction of the wind wheel, and the fan assembly further includes a flow concentrator installed at the wind inlets of the volute casing.

[0026] In some possible designs, the volute casing includes a first casing and a second casing connected to each other, the first casing being provided with a diverging section and a vortex section.

[0027] In a second aspect of the present application, an air conditioner is proposed, which includes a fan assembly in any of the above technical solutions.

[0028] The air conditioner proposed in this application includes the fan assembly in any of the above technical solutions, and therefore has all the beneficial effects of the fan assemblies in the above technical solutions, which will not be described here.

[0029] Additional aspects and advantages of the present application will be set forth in part in the description which follows, or may be learned by the practice of the present application.

[0030] The above and / or additional aspects and advantages of the present application will become apparent and easier to understand from the following detailed description of the embodiments taken in conjunction with the accompanying drawings, in which: [Brief description of the drawings]

[0031] [Figure 1] FIG. 2 is a structural schematic diagram of a fan assembly (wind wheel concealed) according to an embodiment of the present application. [Diagram 2] FIG. 2 is a side view of the fan assembly shown in FIG. [Diagram 3] FIG. 2 is a cross-sectional view of the fan assembly shown in FIG. [Figure 4] 2 is a structural schematic diagram of a first casing in the fan assembly shown in FIG. 1. [Diagram 5] FIG. 5 is a side view of the first casing shown in FIG. [Figure 6] 5 is a partial enlarged view of a portion A of the first casing shown in FIG. 4. [Figure 7] 6 is a partial enlarged view of a portion B of the first casing shown in FIG. 5. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0032] In order to make the above-mentioned objects, features and advantages of the present application more clearly comprehensible, the present application will be described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, unless inconsistent, the embodiments of the present application and the features in the embodiments may be combined with each other.

[0033] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, but the present application may be implemented in other ways than as described herein, and therefore the scope of protection of the present application is not limited by the specific embodiments disclosed below.

[0034] Hereinafter, the fan assembly and the air conditioner provided in some embodiments of the present application will be described with reference to Figures 1 to 7. The dotted arrow in Figure 3 indicates the airflow direction of the volute casing 102. The dashed line L1 in Figures 2 and 4 indicates the reference plane L1, the straight line L2 in Figure 7 indicates the horizontal plane, and the dashed line O in Figure 4 indicates the axial direction of the wind wheel.

[0035] As shown in Figures 1, 2 and 3, one embodiment of the present application proposes a fan assembly including a volute casing 102 and a wind wheel (not shown).

[0036] As shown in FIG. 3, the volute casing 102 includes a casing body 104 and a volute tongue 112 connected to an opening of the casing body 104. At least a part of the wind wheel is installed in the casing body 104. During operation of the fan assembly, the wind wheel can rotate to draw air into the casing body 104 from the outside, and the air is discharged after being pressurized by the wind wheel.

[0037] In particular, during the operation of the fan assembly, the distribution of the airflow discharged from the wind wheel is non-uniform, and the air volume is larger near the center position in the axial direction of the wind wheel, and the airflow velocity is correspondingly faster at the location where the air volume is larger. Therefore, as shown in Figures 4, 5 and 6, this embodiment optimizes the shape of the volute casing 102, and ensures that the volute tongue 112 includes a vortex section 110 and a diverging section 108 used in cooperation with each other, and that the vortex section 110 is set higher than the diverging section 108 so that the relative position of the diverging section 108 is lower. In this way, the vortex area at the position of the vortex section 110 in the volute tongue 112 can be effectively enlarged, and thus the flow velocity of the airflow at the position of the vortex section 110 can be reduced, and the overall flow velocity of the fan assembly can be made relatively uniform.

[0038] Also, as shown in Figures 4, 5 and 6, along the axial direction of the wind wheel, the vortex sections 110 are located on both sides of the divergent section 108, and the divergent section 108 is located in the middle, ensuring that the distribution of the vortex sections 108 and 110 is located to match the airflow distribution exiting the wind wheel. The divergent section 108 is located lower than the vortex section 110 so that it can be used to increase the vortex area at that position and further reduce the airflow velocity at that position. In this way, the cooperation of the vortex section 110 and the divergent section 108 ensures the uniformity of the airflow from the fan assembly.

[0039] In this way, for the same operating noise, the fan assembly proposed in this embodiment can deliver a larger amount of air and can meet the air conditioning needs of a larger space. Correspondingly, for the same air volume, the fan assembly proposed in this embodiment has a lower operating noise, improving the comfort of the fan assembly. Correspondingly, for the same air volume and the same operating noise, the fan assembly proposed in this embodiment has a smaller volume and can meet the requirements of lower cost or more diverse installation spaces.

[0040] Therefore, in this embodiment, the shape of the volute casing 102 is optimized, and the volute tongue 112 includes a vortex section 110 and a diverging section 108 used in cooperation with each other, which reduces the air flow velocity at the position of the vortex section 110, ensures the uniformity of the airflow from the fan assembly, and effectively improves the operating performance of the fan assembly.

[0041] A second embodiment of the present application further proposes a fan assembly as follows based on the first embodiment.

[0042] As shown in Figures 4 and 6, the spiral tongue 112 further includes a tongue body 106 connected to an opening of the casing body 104, and both the diverging section 108 and the vortex section 110 are provided in the tongue body 106.

[0043] The vortex section 110 is flush with the inner wall of the tongue body 106, and during operation of the fan assembly, the airflow is directly guided and diverted through the inner wall of the tongue body 106, and the airflow pressurized by the wind wheel passes through the vortex section 110 and is finally discharged. Specifically, the inner wall of the tongue body 106 defines the vortex section 110.

[0044] In addition, the diverging portion 108 is recessed in the tongue body 106. In this way, it is ensured that the diverging portion 108 is located lower than the vortex portion 110, i.e., the vortex area at the position where the diverging portion 108 is located is larger than the vortex area at the position where the vortex portion 110 is located, and the flow rate of the airflow at the position where the diverging portion 108 is located is reduced to a certain extent, and it is ensured that the flow rate of the airflow at the position where the diverging portion 108 is located and the flow rate of the airflow at the position where the vortex portion 110 is located are consistent with each other, thereby realizing uniform airflow throughout the entire fan assembly. Specifically, a recessed groove is provided inside the tongue body 106, and the diverging portion 108 is defined by this recess.

[0045] The structure of the volute tongue 112 in this embodiment is simple, which can simplify the structure of the volute tongue 112 and the entire fan assembly, and at the same time, facilitate the manufacture of the volute tongue 112 and the entire fan assembly. In addition, the diverging portion 108 of the recess can further reduce the wind resistance at that position. As a result, for the same air volume, the resistance in the volute casing 102 can be overcome by a higher static pressure, and the air volume distribution in the volute casing 102 can be made more uniform and rational.

[0046] Also, the divergent section 108 and the casing body 104 may be directly connected along the airflow direction of the spiral casing 102, or a fillet may be provided between the divergent section 108 and the casing body 104, and the divergent section 108 and the casing body 104 may be further connected via this fillet. Either of the above two methods ensures a smooth connection between the divergent section 108 and the inner wall of the casing body 104.

[0047] A third embodiment of the present application further proposes a fan assembly as follows based on the second embodiment.

[0048] 2 and 4, the depth of the middle part of the divergent section 108 is greater than the depth of both ends along the axial direction of the wind wheel. Specifically, a plane that is equidistant to both axial end faces of the wind wheel is set as a reference plane L1, the center of the divergent section 108 is positioned on the reference plane L1 along the axial direction of the wind wheel, and the depth of the middle part of the divergent section 108 from the reference plane L1 to both sides along the axial direction of the wind wheel is greater than the depth of both ends. Specifically, the depth of the divergent section 108 is the recess depth of the divergent section 108.

[0049] In this embodiment, the depth of the divergent section 108 is optimized so that the depth of the middle part of the divergent section 108 is greater than the depth of both ends along the axial direction of the wind wheel. As a result, the depth of the divergent section 108 gradually decreases from the center to both sides along the axial direction of the wind wheel, so the divergent section 108's flow spreading effect gradually decreases along the axial direction of the wind wheel. In other words, the eddy current area gradually decreases from the middle part of the divergent section 108 to both sides along the axial direction of the wind wheel.

[0050] In particular, during operation of the fan assembly, the air volume is maximum at the reference plane L1 along the axial direction of the wind wheel, and the air volume gradually decreases from the reference plane L1 to both sides. Therefore, in this embodiment, the divergent section 108 is provided on the volute tongue 112, and the depth of the divergent section 108 is further optimized to match the air volume at that position, ensuring that the depth of the divergent section 108 is maximum at the reference plane L1 and gradually decreases on both sides. This ensures that the flow speed of the airflow at the position of the divergent section 108 is consistent.

[0051] In this embodiment, further, as shown in Fig. 4, when the divergent section 108 is cut along the axial direction of the wind wheel, the divergent section 108 may include one circular arc or may include multiple connected circular arcs, which gradually increases or decreases the depth of the reference surface L1 and ensures that the reference surface L1 is in a smooth state along the axial direction of the wind wheel, on the one hand, ensures the harmony of the overall structure of the divergent section 108, and on the other hand, ensures that the divergent section 108 does not create wind resistance in the volute casing 102, and ensures the blowing efficiency of the fan assembly.

[0052] In this embodiment, further, when the divergent section 108 is cut along the axial direction of the wind wheel, the height of the divergent section 108 rises synchronously from the middle part of the divergent section 108 toward both ends of the divergent section 108 as shown in Fig. 4. In other words, when the divergent section 108 is cut along the axial direction of the wind wheel, the divergent section 108 is disposed symmetrically with respect to the reference plane L1.

[0053] In particular, during operation of the fan assembly, the airflow flowing out of the wind wheel gradually decreases from the reference plane L1 toward both sides, and the amount of airflow has a negative correlation with the distance from the position to the reference plane L1. Therefore, in this embodiment, the shape of the divergent section 108 is optimized according to the distribution rule of the airflow, so that when the divergent section 108 is cut along the axial direction of the wind wheel, the divergent section 108 is guaranteed to be installed symmetrically with respect to the reference plane L1. That is, it is guaranteed that the shape of the divergent section 108 matches the airflow distribution, and the reference plane L1 is guaranteed to be in a smooth state in the axial direction of the wind wheel, on the one hand, the overall structural harmony of the divergent section 108 is guaranteed, and on the other hand, it is guaranteed that the divergent section 108 does not generate wind resistance in the volute casing 102, so that the blowing efficiency of the fan assembly is guaranteed.

[0054] A fourth embodiment of the present application further proposes a fan assembly as follows based on the second embodiment.

[0055] 5 and 7, the diverging section 108 is connected to one end of the inner wall of the casing body 104, which is lower than the end of the inner wall of the tongue body 106. That is, the height of the diverging section 108 gradually increases along the wind direction of the volute casing 102.

[0056] In this manner, optimizing the height of the divergent section 108 ensures a smooth connection between the divergent section 108 and the inner wall of the volute 112. In this manner, it is ensured that the airflow exits the casing body 104 smoothly during operation of the fan assembly, and that the airflow is in a smooth transition state as it passes through the divergent section 108.

[0057] A fifth embodiment of the present application further proposes a fan assembly as follows based on the fourth embodiment.

[0058] As shown in Fig. 5 and Fig. 7, after the installation of the air conditioner is completed, the air outlet 124 of the spiral casing 102 is set horizontally. Among these, when the divergent section 108 is cut along the radial direction of the wind wheel, the divergent section 108 includes a straight line. Also, the first included angle between this straight line and the horizontal plane L2 is greater than 8° and equal to or less than 12°. That is, it is guaranteed that there is an inclination angle of 8° to 12° between the wall surface of the divergent section 108 and the air blowing direction along the air outlet direction of the spiral casing 102, and it is guaranteed that the position of one side of the divergent section 108 facing the casing main body 104 is low.

[0059] In this way, during operation of the fan assembly, the airflow pressurized by the wind wheel first flows toward the position where the divergent section 108 and the vortex section 110 are located. Since there is an inclination angle of 8° to 12° between the wall surface of the divergent section 108 and the horizontal plane L2, the airflow can smoothly flow toward the divergent section 108. In addition, since the divergent section 108 is lower than the vortex section 110, it is ensured that the flow speed of the airflow flowing through the divergent section 108 is reduced and matches the flow speed of the airflow flowing through the vortex section 110. This first ensures that the blowing speed of the entire fan assembly is uniform, and secondly, it ensures that the airflow flows smoothly and efficiently through the divergent section 108, thereby reducing the operating noise of the fan assembly and improving the blowing efficiency of the fan assembly.

[0060] In a specific embodiment, the first included angle θ may be 8°, 9°, 10°, 11°, 12°, etc., but this is not specifically limited here, and it is understandable to those skilled in the art that any angle can be realized as long as it can achieve noise reduction and improved air blowing efficiency.

[0061] A sixth embodiment of the present application further proposes a fan assembly as follows based on the fourth embodiment.

[0062] After the installation of the air conditioner is completed, the outlet 124 of the spiral casing 102 is set horizontally. When the divergent section 108 is cut out along the radial direction of the wind wheel, the divergent section 108 includes an arc line (this embodiment is not shown in the drawings). In addition, a second included angle is formed between the tangent line at one end of the arc line close to the wind wheel and the horizontal plane L2, and the second included angle is greater than 8° and less than or equal to 12°. That is, it is ensured that an inclination angle of 8° to 12° exists between the wall surface of the divergent section 108 and the blowing direction along the air outlet direction of the spiral casing 102, and it is ensured that the position of one side of the divergent section 108 facing the casing main body 104 is low.

[0063] In this way, during operation of the fan assembly, the airflow pressurized by the wind wheel first flows toward the position where the divergent section 108 and the vortex section 110 are located. Since there is an inclination angle of 8° to 12° between the wall surface of the divergent section 108 and the horizontal plane L2, the airflow can smoothly flow toward the divergent section 108. In addition, since the divergent section 108 is lower than the vortex section 110, it is ensured that the flow speed of the airflow flowing through the divergent section 108 is reduced and matches the flow speed of the airflow flowing through the vortex section 110. This first ensures that the blowing speed of the entire fan assembly is uniform, and secondly, it ensures that the airflow flows smoothly and efficiently through the divergent section 108, thereby reducing the operating noise of the fan assembly and improving the blowing efficiency of the fan assembly.

[0064] In a specific embodiment, the second included angle may be 8°, 9°, 10°, 11°, 12°, etc., but this is not specifically limited here, and it is understandable to those skilled in the art that any angle can be realized as long as it can achieve noise reduction and improved air flow efficiency.

[0065] A seventh embodiment of the present application further proposes a fan assembly as follows based on the second embodiment.

[0066] 2 and 7, in this embodiment, the ratio of the maximum depth H of the divergent section 108 to the axial dimension L of the spiral tongue 112 is optimized to be 0.05 or more and 0.1 or less. This ensures that the maximum recess depths of the divergent section 108 in the spiral tongue 112 match each other, that is, it ensures that the maximum recess dimensions of the divergent section 108 in the spiral tongue 112 are compatible.

[0067] Specifically, the maximum depth H of the divergent section 108 directly affects the divergent effect. In other words, the larger the maximum depth H of the divergent section 108, the better the divergent effect at the position where the depth is maximum, and the better the flow velocity reduction effect for the airflow. For this reason, in this embodiment, by setting the ratio of the maximum depth H of the divergent section 108 to the axial dimension L of the spiral tongue 112 to be 0.05 or more, a sufficient divergent effect by the divergent section 108 can be ensured.

[0068] Furthermore, if the ratio of the maximum depth H of the divergent section 108 to the axial dimension L of the spiral tongue 112 is too large, the strength of the entire spiral tongue 112 will be reduced by the divergent section 108. For this reason, in this embodiment, the ratio of the maximum depth H of the divergent section 108 to the axial dimension L of the spiral tongue 112 is set to 0.1 or less, which ensures that the divergent section 108 matches the structure of the spiral tongue 112, ensures the strength of the spiral tongue 112 while ensuring the divergent effect, and further ensures the service life of the spiral tongue 112 and the entire fan assembly.

[0069] In a specific embodiment, the ratio of the maximum depth H of the diverging section 108 to the axial dimension L of the spiral tongue 112 may be 0.05, 0.06, 0.07, 0.08, 0.09, 0.1, etc., and although no specific limitations are given here, any of these are feasible as long as the diverging section 108 has a sufficient diverging effect and relatively strong strength, and can be understood by a person skilled in the art.

[0070] An eighth embodiment of the present application further proposes a fan assembly as follows based on the second embodiment.

[0071] As shown in Figures 4 and 6, the fan assembly further includes a recessed base 114, which is provided in the vortex section 110 and located on both sides of the divergent section 108. The recessed base 114 is provided in the vortex section 110 to ensure the minimum gap between the inner wall of the volute casing 102 and the outer edge of the wind wheel at the volute tongue 112, while reducing the impact of the airflow on the volute casing 102, optimizing the flow field inside the volute casing 102, effectively suppressing the generation of vortexes caused by the airflow at the volute tongue 112, ensuring the performance of the fan assembly, while effectively reducing the vortex noise of the fan, further improving the use comfort of the fan assembly, and ensuring the blowing efficiency of the fan assembly.

[0072] In this embodiment, as shown in Fig. 4 and Fig. 6, the volute tongue 112 further includes a recessed base 114 disposed on the tongue body 106, and the diverging portion 108 is located between the two recessed bases 114. That is, in this embodiment, the volute tongue 112 is provided at a position adjacent to both side walls of the volute casing 102, and the recessed bases 114 are ensured to be located on both sides of the diverging portion 108, and the diverging portion 108 is ensured to be located between the two recessed bases 114. In particular, during the operation of the fan assembly, the provision of the recessed bases 114 ensures the minimum gap between the volute tongue 112 and the outer edge of the wind wheel, while simultaneously reducing the impact of the airflow on the volute casing 102, optimizing the flow field inside the volute casing 102, effectively suppressing the generation of vortexes caused by the airflow in the volute tongue 112, ensuring the performance of the fan assembly, while effectively reducing the vortex noise of the fan, further improving the use comfort of the fan assembly, and ensuring the blowing efficiency of the fan assembly.

[0073] In addition to the first to eighth embodiments, as shown in Fig. 1, the inlet 122 of the volute casing 102 is located on both sides of the axial direction of the wind wheel, and the outlet 124 of the volute casing 102 is located on the radial side of the wind wheel. In this way, during the operation of the fan assembly, the outside air can enter the inside of the volute casing 102 from both sides of the axial direction of the wind wheel, and after being pressurized by the wind wheel, can be discharged from the outlet 124 on the radial side of the wind wheel.

[0074] In addition to the first to eighth embodiments, as shown in Fig. 1, the fan assembly further includes a concentrator 116. The concentrator 116 can be installed on the volute casing 102 and positioned at the air inlet 122 of the volute casing 102. In this way, during use of the fan assembly, the concentrator 116 can achieve good concentrating and guiding effects at the air inlet 122 of the volute casing 102, thereby improving the air volume and air blowing efficiency of the fan assembly.

[0075] 1, the spiral casing 102 includes a first casing 118 and a second casing 120 connected to each other, and the first casing 118 is provided with the above-mentioned divergent flow section 108 and vortex flow section 110. Specifically, the first casing 118 is the lower casing of the spiral casing 102, and the second casing 120 is the upper casing of the spiral casing 102. The first casing 118 is provided with the above-mentioned spiral tongue 112, and the spiral tongue 112 is provided with the above-mentioned divergent flow section 108 and vortex flow section 110.

[0076] A ninth embodiment of the present application proposes an air conditioner including the fan assembly according to any one of the first to eighth embodiments.

[0077] The air conditioner proposed in this embodiment includes the fan assembly of any one of the above embodiments, and therefore has all the beneficial effects of the fan assemblies described above, which will not be described here.

[0078] As shown in Figures 1, 2, 3 and 4, the first specific embodiment of the present application proposes a fan assembly including a volute casing 102 and a wind wheel. This embodiment optimizes the shape of the volute casing 102, and the volute tongue 112 includes a diverging section 108 and a vortex section 110 used in cooperation, and ensures that the vortex section 110 is installed higher than the diverging section 108, so that the relative position of the diverging section 108 is lower. In this way, the vortex area at the position of the vortex section 110 in the volute tongue 112 can be effectively enlarged, and thus the flow rate of the airflow at the position of the vortex section 110 can be reduced, and the overall flow rate of the fan assembly can be made relatively uniform.

[0079] In this embodiment, as further shown in Figure 5, the spiral tongue 112 further includes a tongue body 106 connected to an opening portion of the casing body 104, and the diverging portion 108 and the vortex portion 110 are both provided in the tongue body 106, the vortex portion 110 is provided flush with the inner wall of the tongue body 106, and the diverging portion 108 is provided recessed in the tongue body 106.

[0080] In this embodiment, the depth of the diverging section 108 is further optimized so that the depth of the middle part of the diverging section 108 is greater than the depth of both ends along the axial direction of the wind wheel, as shown in FIG. 4. That is, the depth of the diverging section 108 is gradually reduced from the center to both sides along the axial direction of the wind wheel, so that the diverging effect of the diverging section 108 is gradually reduced along the axial direction of the wind wheel. In addition, when the diverging section 108 is cut along the axial direction of the wind wheel, the diverging section 108 can include one arc or multiple connected arcs, and it is guaranteed that the reference plane L1 is in a smooth state in the axial direction of the wind wheel. In addition, when the diverging section 108 is cut along the axial direction of the wind wheel, the diverging section 108 is installed symmetrically with respect to the reference plane L1, and it is guaranteed that the shape of the diverging section 108 matches the airflow distribution. In addition, since the height of the expansion section 108 gradually increases along the airflow direction of the spiral casing 102, it is ensured that the airflow flows smoothly through the expansion section 108, and that the airflow is in a state where it transitions smoothly as it passes through the expansion section 108.

[0081] In this embodiment, as shown in Fig. 7, after the installation of the air conditioner is completed, the outlet 124 of the volute casing 102 is set horizontally. When the divergent section 108 is cut along the radial direction of the wind wheel and the divergent section 108 includes a straight line, a first included angle θ is formed between the straight line and the horizontal plane L2, and the first included angle θ is greater than 8° and less than 12°. When the divergent section 108 includes a circular arc, a second included angle is formed between a tangent to the circular arc at one end closer to the wind wheel and the horizontal plane L2, and the second included angle is greater than 8° and less than 12°.

[0082] In this embodiment, the ratio between the maximum depth H of the diverging section 108 and the axial dimension L of the spiral tongue 112 is further optimized, and the ratio between the maximum depth H of the diverging section 108 and the axial dimension L of the spiral tongue 112 is set to be greater than or equal to 0.05 and less than or equal to 0.1.

[0083] In this embodiment, as shown in Fig. 6, the volute tongue 112 further includes a recessed base 114 disposed on the swirling section 110 and located on both sides of the diverging section 108. In this way, the minimum clearance between the inner wall of the volute casing 102 and the outer edge of the wind wheel is ensured, while reducing the impact of the airflow on the volute casing 102, optimizing the flow field inside the volute casing 102, effectively suppressing the generation of swirling flow caused by the airflow in the volute tongue 112, ensuring the performance of the fan assembly, while effectively reducing the vortex noise of the fan, further improving the use comfort of the fan assembly, and ensuring the blowing efficiency of the fan assembly. Specifically, the volute tongue 112 is provided with a recessed base 114, and the diverging section 108 is located between the two recessed bases 114.

[0084] 1, in this embodiment, the inlets 122 of the volute casing 102 are located on both sides of the axial direction of the wind wheel, and the outlets 124 of the volute casing 102 are located on the radial sides of the wind wheel. In addition, a concentrator 116 is installed at the inlet 122 of the volute casing 102, which can provide good concentrating and directing effects at the inlet 122 of the volute casing 102, and can improve the airflow and efficiency of the fan assembly.

[0085] In a specific embodiment, the fan assembly is a core component of an air conditioner, and its performance determines the size, performance and sound quality of the air conditioner. Currently, due to technical limitations of the fan assembly, air conditioners generally have relatively high noise, relatively large size and poor heat exchange effect. This application proposes a fan assembly that solves the problems of high noise, large size and poor heat exchange effect.

[0086] As shown in Figures 1, 2, 3 and 4, the fan assembly proposed by the present application includes a volute casing 102, a wind wheel, a diverging section 108, and a vortex section 110. The volute casing 102 includes a casing body 104 and a volute tongue 112 connected to an opening of the casing body 104. Here, as shown in Figure 4, the volute tongue 112 includes the diverging section 108 and the vortex section 110 used in cooperation, and the diverging section 108 is downwardly concave and is lower than the vortex section 110 (the downward concave direction faces the outside of the volute tongue 112). Also, as shown in Figure 4, when a plane having an equal distance to both end faces in the axial direction of the wind wheel is set as a reference plane L1 and the diverging section 108 is cut along the axial direction of the wind wheel, the diverging section 108 is installed symmetrically with respect to the reference plane L1. Also, when the divergent section 108 is cut along the radial direction of the wind wheel, as shown in FIG. 7, if the divergent section 108 includes a straight line, a first included angle θ is formed between the straight line and the horizontal plane L2, and the first included angle θ is greater than 8° and less than 12°. When the divergent section 108 includes a circular arc line, a second included angle is formed between a tangent line at one end of the circular arc line close to the wind wheel and the horizontal plane L2, and the second included angle is greater than 8° and less than 12°. Also, the ratio of the maximum depth H of the divergent section 108 to the axial dimension of the spiral tongue 112 is greater than 0.05 and less than 0.1. Also, when the divergent section 108 is cut along the axial direction of the wind wheel, the divergent section 108 includes one circular arc or includes multiple connected circular arcs. In addition, in the air blowing direction of the spiral casing 102, the flow expansion section 108 may be directly connected to the inner wall of the casing body 104, or a fillet may be provided between the flow expansion section 108 and the inner wall of the casing body 104. In addition, as shown in Fig. 6, a recessed base 114 may be provided at the position of the vortex section 110.

[0087] For the same noise level, an air conditioner using the fan assembly proposed in the present application can deliver a larger air volume and can meet the air conditioning needs of a larger space. Correspondingly, for the same air volume, an air conditioner using the fan assembly proposed in the present application has a lower noise level and can effectively improve the comfort of the air conditioner.

[0088] For the same air volume, the air conditioner applying the fan assembly proposed in the present application has a higher static pressure, overcomes the resistance in the air duct, and reduces the installation of equipment in the air conditioner. Correspondingly, for the same air volume, the heat exchanger surface of the air conditioner applying the fan assembly proposed in the present application has a more uniform air velocity distribution.

[0089] In the case of the same air volume and the same noise, the air conditioner applying the fan assembly proposed in this application has a smaller volume and can meet the requirements of lower cost or more diverse installation space.

[0090] In the description of this application, the term "multiple" means two or more, but unless there is additional clear limitation, the orientation or positional relationship indicated by the terms "upper", "lower", etc. is the orientation or positional relationship indicated based on the drawings, and is merely for the purpose of more conveniently explaining and simplifying the description of this application, and is not intended to indicate or imply that it has a specific orientation, is configured in a specific orientation, and must be operated, and therefore these descriptions are not to be understood as limiting this application. The terms "connected", "attached", "fixed", etc. should be understood in a broad sense, for example, "connected" may be a fixed connection, a detachable connection, or may be integrally connected, may be a direct connection, or may be an indirect connection via an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific situation.

[0091] In the present description, the terms "one embodiment," "some embodiments," "particular examples," and the like mean that a particular feature, structure, material, or characteristic described in connection with at least one embodiment or example of the present application is included in at least one embodiment or example of the present application. In the present description, general expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0092] The above is merely a preferred embodiment of the present application, and does not limit the present application, and the present application may be modified or changed by those skilled in the art. Any amendments, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall fall within the scope of protection of the present application.

[0093] The correspondence between the reference characters and the names of the parts in FIGS. 1 to 7 is as follows: [Explanation of symbols]

[0094] 102...spiral casing, 104...casing main body, 106...tongue main body, 108...expansion section, 110...vortex section, 112...spiral tongue, 114...recessed base, 116...flow collector, 118...first casing, 120...second casing, 122...air inlet, 124...air outlet.

Claims

1. 1. A fan assembly comprising: a spiral casing including a casing body and a spiral tongue connected to an opening of the casing body; a wind wheel at least partially disposed within the casing body; The volute includes a diverging portion and a vortex portion, the vortex portions are located on both sides of the diverging portion along the axial direction of the wind wheel, and the vortex portions are higher than the diverging portion; The volute further includes a recessed platform installed in the vortex section and located on both sides of the diverging section, the recessed platform being lower and flatter than the maximum height of the vortex section, and the recessed platform extending partially along the circumferential direction of the wind wheel from the vortex section to an inner wall of the casing body connected to the volute.

2. 2. The fan assembly of claim 1, wherein the volute tongue further includes a tongue body, the tongue body being provided with the diverging portion and the vortex portion, the diverging portion being recessed into the tongue body.

3. 3. The fan assembly according to claim 2, wherein a depth of the middle portion of the diverging section is greater than a depth of each of the opposite ends along the axial direction of the wind wheel.

4. 4. The fan assembly of claim 3, wherein the divergent section comprises one circular arc or comprises a plurality of connected circular arcs when cut along an axial direction of the wind wheel.

5. 5. The fan assembly according to claim 2, wherein the height of the airflow expansion section gradually increases in the airflow outlet direction of the volute casing.

6. When the diverging section is cut along the radial direction of the wind wheel, the diverging section includes a straight line, and a first included angle between the straight line and a horizontal plane is greater than 8° and less than or equal to 12°; or 6. The fan assembly of claim 5, wherein when the diverging portion is cut along a radial direction of the wind wheel, the diverging portion includes an arc line, and a second included angle between a tangent line at an end of the arc line closer to the wind wheel and a horizontal plane is greater than 8° and less than or equal to 12°.

7. The diverging section is coupled to the inner wall of the casing body along the radial direction of the wind wheel; or The fan assembly according to claim 5 , wherein a fillet is provided between the diverging portion and the inner wall of the casing body along a radial direction of the wind wheel.

8. 3. The fan assembly according to claim 2, wherein a ratio of a maximum depth of the divergent portion to an axial dimension of the volute is equal to or greater than 0.05 and is equal to or less than 0.

1.

9. Along the axial direction of the wind wheel, the wind inlets of the volute casing are located on both sides of the wind wheel; 5. The fan assembly according to claim 1, further comprising a concentrator disposed at an air inlet of the volute casing.

10. An air conditioner comprising the fan assembly of claim 1.

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