Volute, fan assembly and air conditioner

Abstract

The utility model discloses a volute, fan component and air conditioner relates to fan technical field, the volute includes front plate, back plate and coaming, the inner wall of coaming includes first exit section, volute tongue section, multi-section arc section and second exit section that connect in proper order; the multiple arc sections comprise the first arc section, the first arc section is connected to the volute tongue section, the radius of the first arc section is R1, and R1 is larger than 65 mm and smaller than 75 mm. The diameter D of the impeller is larger than or equal to 125 mm and smaller than or equal to 140 mm. According to the technical scheme, the air volume is increased, and noise is reduced.

Description

Technical Field

[0001] This utility model relates to the field of fan technology, and in particular to a volute, a fan assembly, and an air conditioner. Background Technology

[0002] Air volume and noise are the core parameters of a fan in application. Currently, conventional designs increase air volume by increasing the diameter of the impeller. However, due to the limited design space of the fan, the volute cannot be well matched after the impeller is enlarged. It is often necessary to cut the side or adopt an extremely short diffuser section design, which will worsen the noise.

[0003] Designing a volute within a limited space, and achieving a good match between it and the impeller to meet the requirements of large air volume, low noise, and small space, has significant application value. Utility Model Content

[0004] This utility model proposes a volute, a fan assembly, and an air conditioner, with the aim of increasing airflow and reducing noise within a limited space.

[0005] To achieve the above objectives, this utility model proposes a volute, comprising:

[0006] front panel,

[0007] A back panel, which is spaced apart from the front panel;

[0008] A surround panel, wherein the surround panel connects the front plate and the back plate with a continuous curved surface to form a cavity for accommodating the impeller and to form an air outlet;

[0009] The inner wall of the enclosure includes a first outlet section, a volute tongue section, a multi-arc section, and a second outlet section connected in sequence; the multi-arc section includes a first arc section connected to the volute tongue section, the radius of the first arc section is R1, 65mm < R1 < 75mm, and the diameter of the impeller is D, 125mm ≤ D ≤ 140mm.

[0010] In one embodiment, the multiple arc segments include a first arc segment, a second arc segment, a third arc segment, and a fourth arc segment connected in sequence, wherein the centers of the first arc segment, the second arc segment, the third arc segment, and the fourth arc segment are O1, O2, O3, and O4, respectively. 4， The center of the impeller is O; the plane containing the air outlet is the first direction, and the plane perpendicular to the air outlet is the second direction; the distance between O1 and O in the first direction is L1, the distance between O2 and O in the second direction is L2, the distance between O3 and O in the first direction is L3, and the distance between O4 and O in the second direction is L4. L1, L2, L3, and L4 satisfy the following conditions.

[0011] L1≤1mm;4mm≤L2+L4≤10mm;4mm≤L1+L3≤10mm;

[0012] In one embodiment, the length of the volute in the second direction is H1, and the distance between O and the plane where the air outlet is located is H3, where H3 > 0.5H1.

[0013] In one embodiment, the distance between O and the plane where the air outlet is located is H3, and the radius of the impeller is R0, where 1.3R0≤H3≤1.5R0.

[0014] In one embodiment, the angle between the tangent formed by the cochlear tongue segment and O and the second direction is θ, where 15°≤θ≤35°.

[0015] In one embodiment, the wall thickness of the enclosure corresponding to the second outlet section gradually increases in the direction extending toward the air outlet.

[0016] In one embodiment, the wall thickness of the enclosure corresponding to the first outlet section, the volute tongue section, the first arc section, the second arc section, the third arc section, and the fourth arc section is the same.

[0017] In one embodiment, the first outlet section gradually moves away from the second outlet section in the direction extending toward the air outlet.

[0018] In one embodiment, the second outlet section tends to gradually approach the first outlet section in the direction extending toward the air outlet.

[0019] In one embodiment, the front panel has an air inlet, and an inlet mesh is provided at the air inlet.

[0020] This utility model also proposes a fan assembly, including the aforementioned volute and an impeller disposed within the volute.

[0021] This utility model also proposes an air conditioner, including the aforementioned fan assembly.

[0022] The technical solution of this utility model optimizes the casing by improving the enclosure plate, thus achieving a good match between the internal air duct and the impeller, improving the efficiency of the fan, and giving it the advantages of large air volume and low noise. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0024] Figure 1 A schematic diagram of the structure of an embodiment of the volute provided by this utility model;

[0025] Figure 2 A cross-sectional structural diagram of an embodiment of the volute provided by this utility model;

[0026] Figure 3 This utility model Figure 2 A partially enlarged structural diagram of the embodiment;

[0027] Figure 4 A cross-sectional structural schematic diagram of an embodiment of the volute provided by this utility model.

[0028] Explanation of icon numbers:

[0029] 1. Volute; 11. Front panel; 111. Air inlet; 112. Inlet grille; 12. Back panel; 13. Enclosure panel; 131. Inner wall; 131a. First outlet section; 131b. Volute tongue section; 131H. Arc section; 131c. First arc section; 131d. Second arc section; 131e. Third arc section; 131f. Fourth arc section; 131g. Second outlet section; 14. Cavity; 15. Air outlet; 2. Impeller. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0031] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0032] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0033] Air volume and noise are the core parameters for evaluating the performance of a fan. How to design a volute within a limited space and achieve a good match between it and the impeller to meet the requirements of large air volume and low noise is an urgent problem to be solved in this field.

[0034] Therefore, this application optimizes the volute structure to achieve a good match between the internal air duct and the impeller, thereby improving the efficiency of the fan and giving it the advantages of large air volume and low noise.

[0035] Please refer to Figure 1 , Figure 2 , Figure 3 As shown in the figure, an embodiment of this application provides a volute 1, including a front plate 11, a back plate 12, and a surrounding plate 13. The front plate 11 and the back plate 12 are spaced apart. The surrounding plate 13 connects the back plate 12 and the front plate 11 with a continuous curved surface to form a cavity 14 for accommodating an impeller 2, and an air outlet 15 is formed at one end there. The inner wall of the surrounding plate 13 includes a first outlet section, multiple arc segments, and a second outlet section connected in sequence. The multiple arc segments include a first arc segment connected to the volute tongue section. The radius of the first arc segment is R1, 65mm < R1 < 75mm. The diameter of the impeller is D, 125mm ≤ D ≤ 140mm. This application can improve the efficiency of the fan and increase the air volume by optimizing the inner wall of the surrounding plate. In this embodiment, "multiple segments" refers to at least two arc segments.

[0036] Please refer to Figure 1 , Figure 2 and Figure 3As shown, another embodiment of this application provides a volute 1, including a front plate 11, a back plate 12, and a surrounding plate 13. The front plate 11 and the back plate 12 are spaced apart. The surrounding plate 13 connects the back plate 12 and the front plate 11 with a continuous curved surface to form a cavity 14 for accommodating an impeller 2, and an air outlet 15 is formed at one end thereto. The inner wall 131 of the surrounding plate 13 includes a first outlet section 131a, a volute tongue section 131b, a first arc section 131c, a second arc section 131d, a third arc section 131e, a fourth arc section 131f, and a second outlet section 131g connected in sequence. The centers of the first arc segment 131c, the second arc segment 131d, the third arc segment 131e, and the fourth arc segment 131f are O1, O2, O3, and O4 respectively. The center of the impeller 2 is O. The radius of the first arc segment 131c is R1, 65mm < R1 < 75mm. The diameter of the impeller 2 is D, 125mm ≤ D ≤ 140mm.

[0037] The plane containing the air outlet 15 is the first direction, and the plane perpendicular to the air outlet 15 is the second direction. The distance between O1 and O in the first direction is L1, the distance between O2 and O in the second direction is L2, the distance between O3 and O in the first direction is L3, and the distance between O4 and O in the second direction is L4. L1, L2, L3, and L4 satisfy the following conditions: L1 ≤ 1mm; 4mm ≤ L2 + L4 ≤ 10mm; 4mm ≤ L1 + L3 ≤ 10mm.

[0038] Specifically, the volute 1 of this application is used in a fan assembly, and the interior of the volute 1 is used to install the impeller 22. The function of the volute 1 is to collect and guide the gas thrown out by the impeller 2. After the gas is thrown out by the impeller 2, the volute 1 can effectively collect and guide the gas, causing it to flow to the outlet 15. The volute 1 includes a front plate 11, a rear plate, and a surrounding plate 13. The front plate 11 and the rear plate are arranged opposite each other and are approximately the same in shape and size. The surrounding plate 13 is similar in shape to a ring and is located in the space between the front plate 11 and the rear plate. The surrounding plate 13 connects the edges of the front plate 11 and the back plate 12 with a continuous curved surface to form a cavity 14 and an outlet 15. The impeller 2 is installed in the cavity 14, and the outlet 15 communicates with the cavity 14, allowing the internal airflow to be discharged to the outside.

[0039] The inner wall 131 of the enclosure 13 extends from one side of the air outlet 15 to the other side of the air outlet 15 to form a ring-like structure. This, combined with the front plate 11 and the back plate 12, forms a ring-shaped cavity 14. The impeller 2 is installed inside the cavity 14 and rotates under the drive of an external motor. The inner wall 131 of the enclosure 13 includes a first outlet section 131a (i.e., section AB in the figure), a volute section 131b (i.e., section BC in the figure), a first arc section 131c (i.e., section CD in the figure), a second arc section 131d (i.e., section DE in the figure), a third arc section 131e (i.e., section EF in the figure), a fourth arc section 131f (i.e., section FG in the figure), and a second outlet section 131g (i.e., section GH in the figure), connected in sequence. The air outlet 15 is formed between the first outlet section 131a and the second outlet section 131g. The centers of the first arc segment 131c, the second arc segment 131d, the third arc segment 131e, and the fourth arc segment 131f are all located inside the cavity 14, and the centers of the four arc segments are O1, O2, O3, and O4, respectively. The center of the impeller 2 is O, and the diameter of the impeller 2 is D, which is in the range of 125mm to 140mm. The radius of the first arc segment 131c is R1, which is in the range of 65mm to 75mm.

[0040] It should be noted that the impeller in the figure is only used to illustrate the position of the impeller, and it only shows the position of the outline of the impeller.

[0041] Please refer to Figure 2 and Figure 3 As shown, the air outlet 15 is located on a plane. The plane where the air outlet 15 is located is defined as the first direction, as follows: Figure 2 The X direction shown is perpendicular to the plane where the air outlet 15 is located, which is the second direction. Figure 2 The Y direction is shown. (As shown) Figure 3As shown, O1, O2, O3, and O4 form a rectangle, with the center O of impeller 2 located inside this rectangle. The distance between the center O1 of the first arc segment 131c and the center O of impeller 2 in the first direction is L1; the distance between the center O2 of the second arc segment 131d and the center O of impeller 2 in the second direction is L2; ​​the distance between the center O3 of the third arc segment 131e and the center O of impeller 2 in the first direction is L3; and the distance between the center O4 of the fourth arc segment 131f and the center O of impeller 2 in the second direction is L4. Wherein, L1 ≤ 1 mm; 4 mm ≤ L2 + L4 ≤ 10 mm; 4 mm ≤ L1 + L3 ≤ 10 mm. The inner wall 131 of the enclosure 13 forms the outline of the cavity 14. Therefore, the structure of the inner wall 131 of the enclosure 13 has a significant impact on the performance and efficiency of the fan. If it is designed to be too large, it may lead to wind pressure loss, thereby affecting the efficiency of the fan; if it is designed to be too small, it may affect the flow rate of the fan, which is also not conducive to improving the performance of the fan. This application optimizes the volute 1 by limiting L1, L2, L3, and L4, achieving a good match between the internal air duct of the volute 1 and the impeller 2, improving the efficiency of the fan, and providing the advantages of large air volume and low noise. In some optional embodiments, the number of arc segments can be set to more, that is, the arc segments also include a fifth arc segment, a sixth arc segment, etc.

[0042] Please refer to Figure 4 As shown, in an optional embodiment, the length of the volute 1 in the second direction is H1, and the distance between the center O of the impeller 2 and the plane where the air outlet 15 is located is H3, where H3>0.5H1.

[0043] Specifically, in this embodiment, the length of the volute 1 in the second direction is H1, and the distance between the center O of the impeller 2 and the plane where the air outlet 15 is located is H3. H3 is at least half the length of the volute 1 in the second direction, so as to ensure that the distance from the center O of the impeller 2 to the air outlet 15 is large enough, thereby ensuring that the airflow can pass smoothly through the fan and achieve the expected flow rate and pressure.

[0044] In an optional embodiment, the distance between the center O of the impeller 2 and the plane where the air outlet 15 is located is H3, and the radius of the impeller 2 is R0, where 1.3R0≤H3≤1.5R0.

[0045] Specifically, the distance between the center of impeller 2 and the plane containing the air outlet 15 is H3, and the radius of impeller 2 is R0. The R0 of H3 satisfies the condition: 1.3R0≤H3≤1.5R0. The value of H3 is set between 1.3 and 1.5 times the impeller radius. This constraint ensures that H3 is neither too small nor too large, guaranteeing smooth airflow and avoiding increased fan size and weight, as well as unnecessary energy loss.

[0046] In an optional embodiment, the angle between the tangent formed by the volute tongue segment 131b and the center O of the impeller 2 and the second direction is θ, where 15°≤θ≤35°.

[0047] Specifically, such as Figure 4 As shown, the tangent A formed between the center O of impeller 2 and the volute tongue section 131b is the angle between A and the second direction, which is within the range of 15° to 35°. The size of the angle θ directly affects the fan's performance parameters such as flow rate and pressure. A reasonable angle setting can ensure smooth airflow through the fan, thereby improving its efficiency. Furthermore, the angle θ also has a significant impact on the fan's noise level. By limiting the angle θ, the clearance between the volute tongue and impeller 2 can be optimized, thereby reducing the noise during fan operation.

[0048] In an optional embodiment, the wall thickness of the enclosure 13 corresponding to the second outlet section 131g gradually increases in the direction extending toward the air outlet 15.

[0049] Please refer to this again. Figure 1 and Figure 4 As shown, the thickness of the shroud 13 at the second outlet section 131g gradually increases from the inside out. During fan operation, high pressure is generated inside the volute 1. To ensure the volute 1 can withstand this high pressure without deformation or cracking, the wall thickness of the second outlet section 15 is designed to gradually increase. This improves the overall strength of the volute 1 and ensures the safe operation of the fan. The increased thickness at the second outlet section 131g also increases the stability of the volute 1, allowing it to maintain its shape under the impact of the high-speed rotating impeller 2, thus ensuring the fan's performance and efficiency. The second outlet section 131g is located opposite the volute tongue; therefore, when the impeller 2 rotates at high speed, most of the impact force generated by the airflow is applied to the second outlet section 131g. Thus, the gradually increasing thickness of the second outlet section 131g further increases the stability of the volute 1.

[0050] Please refer to Figure 2 As shown, in an optional embodiment, the wall thickness of the enclosure 13 corresponding to the first outlet section 131a, the volute tongue section 131b, the first arc section 131c, the second arc section 131d, the third arc section 131e, and the fourth arc section 131f is the same.

[0051] Specifically, the wall thickness of the enclosure 13 at the first outlet section 131a, the volute tongue section 131b, the first arc section 131c, the second arc section 131d, the third arc section 131e, and the fourth arc section 131f is the same. It should be noted that the aforementioned "consistent wall thickness" or "same wall thickness" indicates that the wall thickness is approximately the same. In actual manufacturing, a certain tolerance is allowed, such as a tolerance within + / - 5%, which still indicates consistent or same wall thickness. Since the second outlet section 131g mainly bears the impact of airflow, the thickness requirements for other parts are lower. Setting the wall thickness of other parts to be less uniform can reduce the material cost of the volute 1 and reduce its overall dimensions. In an optional embodiment, the thickness of the second outlet section 131g is greater than the wall thickness of the first outlet section 131a, the volute tongue section 131b, the first arc section 131c, the second arc section 131d, the third arc section 131e, and the fourth arc section 131f, in order to ensure the overall mechanical strength of the volute 1 and thus ensure the performance of the fan.

[0052] In an optional embodiment, the first outlet section 131a gradually moves away from the second outlet section 131g in the direction extending toward the air outlet 15.

[0053] Please refer to Figure 2 As shown, the second outlet section 131g and the first outlet section 131a are arranged opposite to each other, and the second outlet section 131g and the first outlet section 131a form the air outlet 15. The first outlet section 131a gradually moves away from the second outlet section 131g in the direction outward from the air outlet 15, and the volute 1 gradually widens near the air outlet 15. After the air is accelerated by the impeller 2 of the fan and centrifugal force is generated, the airflow will flow towards the air outlet 15. The application sets the position of the air outlet 15 to gradually widen, which can help reduce the separation of airflow at the air outlet 15, which helps to reduce noise and improve the stability of the fan.

[0054] In an optional embodiment, the second outlet section 131g tends to gradually approach the first outlet section 131a in the direction extending toward the air outlet 15.

[0055] Please refer to this again. Figure 2As shown, the length of the second outlet section 131g in the second direction is much greater than the length of the first outlet section 131a in the second direction. The second outlet section 131g tends to gradually approach the first outlet section 131a in the direction extending towards the air outlet 15, while the first outlet section 131a extends away from the second outlet section 131g. Therefore, the cavity 14 formed by the enclosure 13 of this application first decreases and then expands in the direction extending towards the air outlet 15. That is, in the process of the airflow flowing towards the air outlet 15, the gas first gains kinetic energy under the action of centrifugal force, and the cavity 14 near the air outlet 15 first decreases, which can increase the kinetic energy of the gas, so that the gas can generate a certain jet effect before reaching the first outlet section 131a. Then, when it is about to reach the air outlet 15, the cavity 14 expands again, which can reduce the speed of the airflow appropriately when it reaches the air outlet 15, reduce the pressure of the airflow, and reduce the separation phenomenon of the airflow at the air outlet 15. This helps to reduce noise and improve the stability of the fan.

[0056] Please refer to Figure 1 As shown, in an optional embodiment, the front panel 11 has an air inlet 111, and an inlet mesh 112 is provided at the air inlet 111.

[0057] In this embodiment, the radius of the first arc segment 131c is 69mm, the diameter D of the impeller 2 is 130mm, the air outlet plane is taken as the horizontal direction (first direction), and the direction perpendicular to the air outlet plane is taken as the vertical direction (second direction). The horizontal distance between the center O1 of the first arc segment 131c and the center O of the impeller 2 is L1, the vertical distance between the center O2 of the second arc segment 131d and the center O of the impeller 2 is L2, the horizontal distance between the center O3 of the third arc segment 131e and the center O of the impeller 2 is L3, and the vertical distance between the center of the fourth arc segment 131f and the center O of the impeller 2 is L4. L1 satisfies the following conditions: L1 = 0.1mm; L2 + L4 = 8mm; L1 + L3 = 6mm; H3 = 1.46R0; θ = 28°.

[0058] Comparative testing was conducted, comparing the volute casing of this embodiment with the original design. Comparing noise levels under the same airflow, this design reduced noise by 1.5 dB, and due to the optimized volute casing structure, the internal cross-sectional area of ​​the volute casing was reduced by 15%. Please refer to the table below for details.

[0059]

[0060]

[0061] In some embodiments, the impeller diameter can be 125mm or 140mm. L1 can be 0, 0.5mm, or 1mm; L2+L4 can be 4mm or 10mm; L1+L3 can be 4mm or 10mm, etc. In these embodiments, by defining L1, L2, L3, and L4, the internal cavity structure of the volute 1 is optimized, achieving a good match between the internal air duct of the volute 1 and the impeller, improving the efficiency of the fan, and providing advantages such as large air volume and low noise.

[0062] This application also relates to a fan assembly, which includes the aforementioned volute 1 and an impeller disposed inside the volute 1. The fan assembly of this application, through optimization of the volute 1, achieves a good match between the internal air duct of the volute 1 and the impeller, improving the efficiency of the fan and offering advantages such as large air volume and low noise.

[0063] This application also relates to an air conditioner that includes the aforementioned fan assembly.

[0064] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A volute, characterized in that, include: front panel, A back panel, which is spaced apart from the front panel; A surround panel, wherein the surround panel connects the front plate and the back plate with a continuous curved surface to form a cavity for accommodating the impeller and to form an air outlet; The inner wall of the enclosure includes a first outlet section, a volute tongue section, a multi-arc section and a second outlet section connected in sequence. The multi-arc section includes a first arc section connected to the volute tongue section. The radius of the first arc section is R1, 65mm < R1 < 75mm. The diameter of the impeller is D, 125mm ≤ D ≤ 140mm.

2. The volute as described in claim 1, characterized in that, The multiple arc segments include a first arc segment, a second arc segment, a third arc segment, and a fourth arc segment connected in sequence, with the centers of the first arc segment, the second arc segment, the third arc segment, and the fourth arc segment being O1, O2, O3, and O4, respectively. 4， The impeller's center is O, the plane containing the air outlet is the first direction, and the plane perpendicular to the air outlet is the second direction; the distance between O1 and O in the first direction is L1, the distance between O2 and O in the second direction is L2, the distance between O3 and O in the first direction is L3, and the distance between O4 and O in the second direction is L4. L1, L2, L3, and L4 satisfy the following condition. L1≤1mm;4mm≤L2+L4≤10mm;4mm≤L1+L3≤10mm; 3. The volute as described in claim 2, characterized in that, The length of the volute in the second direction is H1, and the distance between O and the plane where the air outlet is located is H3, where H3>0.5H1.

4. The volute as described in claim 2, characterized in that, The distance between O and the plane where the air outlet is located is H3, and the radius of the impeller is R0, where 1.3R0≤H3≤1.5R0.

5. The volute as described in claim 2, characterized in that, The angle between the tangent formed by the cochlear tongue segment and O and the second direction is θ, where 15°≤θ≤35°.

6. The volute as described in claim 2, characterized in that, The wall thickness of the enclosure corresponding to the second outlet section gradually increases in the direction extending toward the air outlet.

7. The volute as described in claim 6, characterized in that, The wall thickness of the enclosure corresponding to the first outlet section, the volute tongue section, the first arc section, the second arc section, the third arc section, and the fourth arc section is the same.

8. The volute as described in claim 7, characterized in that, The first outlet section gradually moves away from the second outlet section in the direction extending toward the air outlet.

9. The volute as described in claim 8, characterized in that, The second outlet section tends to gradually approach the first outlet section in the direction of extending towards the air outlet.

10. The volute as claimed in claim 1, characterized in that, The front panel has an air inlet, and an inlet mesh is provided at the air inlet.

11. A fan assembly, characterized in that, It includes a volute as described in any one of claims 1-10 and an impeller disposed within the volute.

12. An air conditioner, characterized in that, Includes the wind turbine assembly as described in claim 11.

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