Centrifugal fan and air conditioner

Abstract

The present invention discloses a centrifugal wind wheel and an air conditioner. The centrifugal wind wheel includes an axis core, a base plate, a plurality of blades and a plurality of ribs. The base plate is outermost on the axis core, the base plate and the axis core are spaced apart along the radial direction of the axis core, the blades are connected to the base plate, a plurality of blades are spaced apart along the circumferential direction of the axis core, one end of the rib is connected to the base plate, the other end of the rib is connected to the axis core, and the number of ribs is 13-60. According to the centrifugal wind wheel of the present invention, by connecting the base plate and the axis core with ribs, and setting the number of ribs to 13-26, the sound quality can be improved, and the excitation noise generated by the ribs and the motor mounting structure can be reduced. In addition, by changing the number of ribs, the heat dissipation effect of the motor can also be improved to achieve the purpose of cooling the motor.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to a centrifugal fan wheel and an air conditioner. Background Art

[0002] The centrifugal impeller is composed of a central axis or an axis hole, blades and the connection between the two, and a blade reinforcement ring (or upper cover). In order to effectively utilize the space, the connection is formed into a bell-shaped shape, which defines a storage space, and the motor that drives the impeller to rotate is placed in the storage space. The opening structure of the hub for heat dissipation and the motor mounting structure produce frequency-doubled excitation, thereby generating abnormal sound and increasing noise. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a centrifugal wind wheel, which has the advantages of simple structure and low wind noise.

[0004] The present invention also provides an air conditioner, which has the centrifugal fan wheel as described above.

[0005] The centrifugal impeller according to the embodiment of the present invention comprises a shaft core, a bottom plate, a plurality of blades and a plurality of ribs, wherein the bottom plate is disposed outside the shaft core, the bottom plate and the shaft core are spaced apart in the radial direction of the shaft core, the blades are connected to the bottom plate, the plurality of blades are spaced apart in the circumferential direction of the shaft core, one end of the rib is connected to the bottom plate, the other end of the rib is connected to the shaft core, and the number of the ribs is 13-60.

[0006] According to the centrifugal impeller of the embodiment of the present invention, the bottom plate and the shaft core are connected by ribs, and the number of ribs is set to 13-26, thereby improving the sound quality and reducing the excitation noise generated by the ribs and the motor mounting structure. In addition, by changing the number of ribs, the heat dissipation effect of the motor can be improved to achieve the purpose of cooling the motor.

[0007] In some embodiments, the base plate is ring-shaped.

[0008] In some embodiments, the base plate is disposed at one end of the blade, and the centrifugal wind wheel further includes a reinforcement ring, which is spaced apart from the base plate along the axial direction of the shaft core, and the reinforcement ring is disposed at the other end of the blade.

[0009] In some embodiments, the diameter of the radial outer side of the reinforcement ring is less than or equal to 250 mm.

[0010] In some embodiments, a diameter of the radially outer side of the base plate is smaller than a diameter of the radially outer side of the reinforcement ring.

[0011] In some embodiments, the ratio of the radial outer diameter of the reinforcement ring to the height of the centrifugal wind wheel in the axial direction of the shaft core is less than or equal to 0.5.

[0012] In some embodiments, the edge of the blade located radially inside the shaft core is located on a curved surface, which is a cylindrical surface. The line connecting the ends of the ribs connected to the base plate is located on a circle, which is a first circle. The diameter of the first circle is smaller than the diameter of the cylindrical surface, and the diameter of the first circle is greater than 0.8 times the diameter of the cylindrical surface.

[0013] In some embodiments, a line connecting the ends of the ribs connected to the shaft core is located on another circle, which is a second circle, and a diameter of the second circle is greater than or equal to 50 mm.

[0014] In some embodiments, the diameter of the second circle is greater than 0.5 times the diameter of the first circle.

[0015] In some embodiments, the distance between any two adjacent ribs is 2-40 mm.

[0016] In some embodiments, the width of the rib in the circumferential direction of the shaft core is 2-10 mm.

[0017] In some embodiments, the ribs have a thickness of 2-4 mm.

[0018] In some embodiments, in the axial direction of the shaft core, the vertical distance between one end of the rib and the other end of the rib is 20-100 mm.

[0019] In some embodiments, in the axial direction of the shaft core, the ratio of the vertical distance between one end of the rib and the other end of the rib to the height of the centrifugal wind wheel in the axial direction of the shaft core is 0.2-0.8.

[0020] In some embodiments, the blade is spaced apart from the rib, and the minimum distance from any point on the blade to the rib is less than or equal to 20 mm.

[0021] In some embodiments, the rib includes a first section, a second section, and a third section connected in sequence, the first section is connected to the base plate, and in the direction from the first section to the third section, the first section is offset toward the radial inner side of the shaft core, and the angle between the first section and the radial inner edge of the blade is 2°-20°.

[0022] In some embodiments, in the direction from the first section to the third section, the second section is offset toward the radial inner side of the shaft core, and an angle between the second section and the radial inner edge of the blade is 15°-60°.

[0023] In some embodiments, there is a first rounded corner between the first section and the bottom plate, the radius of the first rounded corner is less than 10 mm, the radius of the second rounded corner is less than 10 mm, and the radius of the third rounded corner is less than 10 mm.

[0024] In some embodiments, the second segment extends along an arc line, or the second segment extends along a straight line.

[0025] An air conditioner according to an embodiment of the present invention comprises a housing and the centrifugal fan wheel as described above, wherein the centrifugal fan wheel is arranged in the housing.

[0026] According to the air conditioner of the embodiment of the present invention, by connecting the bottom plate and the shaft core with ribs, and setting the number of ribs to 13-26, the sound quality can be improved and the excitation noise generated by the ribs and the motor mounting structure can be reduced. In addition, by changing the number of ribs, the heat dissipation effect of the motor can be improved to achieve the purpose of cooling the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0028] Figure 1 is a three-dimensional diagram of a centrifugal wind wheel according to an embodiment of the present invention;

[0029] Figure 2 is a front view of a centrifugal wind wheel according to an embodiment of the present invention;

[0030] Figure 3 yes Figure 2 Schematic cross-sectional view along the AA direction;

[0031] Figure 4 yes Figure 2 A schematic cross-sectional view along the BB direction;

[0032] Figure 5 yes Figure 2 The cross-section along the BB direction;

[0033] Figure 6 yes Figure 2 The enlarged schematic diagram of the center C;

[0034] Figure 7 is a schematic diagram of the installation structure of a centrifugal wind wheel according to an embodiment of the present invention;

[0035] Figure 8-Figure 10 It is the noise spectrum of the centrifugal wind wheel in the prior art;

[0036] Figure 11-13 Graph 4 is the noise spectrum of the centrifugal wind wheel according to an embodiment of the present invention.

[0037] Reference numerals:

[0038] Centrifugal wind wheel 100,

[0039] Axis core 110,

[0040] Bottom plate 120,

[0041] Blade 130,

[0042] Rib 140, first section 141, second section 142, third section 143,

[0043] Reinforcement ring 150;

[0044] Motor 210 , bracket 220 , motor base 230 . DETAILED DESCRIPTION

[0045] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0046] In the description of the present invention, it should be understood that the terms "center", "width", "thickness", "upper", "lower", "bottom", "inner", "outer", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0047] Reference below Figure 1-Figure 7 A centrifugal wind wheel 100 according to an embodiment of the present invention is described.

[0048] like Figure 1 As shown, the centrifugal wind wheel 100 according to the embodiment of the present invention includes a shaft core 110 , a bottom plate 120 , a plurality of blades 130 and a plurality of ribs 140 .

[0049] Specifically, the bottom plate 120 is annular, and the bottom plate 120 is placed on the shaft core 110, and the bottom plate 120 and the shaft core 110 are spaced apart along the radial direction of the shaft core 110. The blades 130 are connected to the bottom plate 120, and a plurality of blades 130 are spaced apart along the circumferential direction of the shaft core 110. One end of the rib 140 is connected to the bottom plate 120, and the other end of the rib 140 is connected to the shaft core 110. The number of ribs 140 is 13-60, that is, the number of ribs 140 is N, where 13≤N≤60. It is understandable that N can be any integer between 13 and 60, for example, N can be 15, 18, 20, 30, 50 or 55, etc. It should be noted that a hub structure connecting the base plate 120 and the shaft core 110 is constructed using multiple ribs 140, and a receiving space is constructed along the radial inner edge of the shaft core 110 by the multiple ribs 140 to accommodate the motor 210. The power output end of the motor 210 is connected to the shaft core 110 to drive the centrifugal wind wheel 100 to rotate.

[0050] According to the centrifugal wind wheel 100 of the embodiment of the present invention, the bottom plate 120 and the shaft core 110 are connected by using the ribs 140, and the number of the ribs 140 is set to 13-26, thereby improving the sound quality and reducing the excitation noise generated by the ribs 140 and the motor 210 installation structure. In addition, by changing the number of the ribs 140, the heat dissipation effect of the motor 210 can also be improved to achieve the purpose of cooling the motor 210.

[0051] like Figure 3 , Figure 4 As shown, according to some embodiments of the present invention, the bottom plate 120 is disposed at one end of the blade 130. This facilitates connecting a plurality of blades 130 together. Figure 1 , Figure 2 As shown, the centrifugal wind wheel 100 may further include a reinforcing ring 150, which is spaced apart from the bottom plate along the axial direction of the shaft core 110, and is disposed at the other end of the blade 130. It can be understood that the reinforcing ring 150 is spaced apart from the bottom plate 120, and the blade 130 is connected between the bottom plate 120 and the reinforcing ring 150, that is, one end of the blade 130 is connected to the bottom plate 120, and the other end of the blade 130 is connected to the reinforcing ring 150. In this way, the structural strength of the centrifugal wind wheel 100 can be improved.

[0052] According to some embodiments of the present invention, the diameter of the radial outer side of the reinforcement ring 150 is less than or equal to 250 mm. Figure 3 As shown, the radial outer diameter of the reinforcement ring 150 is DO, where DO≤250 mm. In some embodiments, the radial outer diameter of the base plate 120 is smaller than the radial outer diameter of the reinforcement ring 150. For example, Figure 3As shown, the diameter of the radial outer side of the bottom plate 120 is DI, and the diameter of the radial outer side of the reinforcement ring 150 is DO, wherein DI<DO.

[0053] In some embodiments, the ratio of the radial outer diameter of the reinforcing ring 150 to the height of the centrifugal impeller 100 in the axial direction of the shaft core 110 is less than or equal to 0.5. Figure 3 As shown, the radial outer diameter of the reinforcing ring 150 is DO, and the height of the centrifugal wind wheel 100 in the direction of the shaft core 110 is H, where DO / H≤0.5. After experimental verification, in some embodiments, when DO≤250mm, DI<DO and DO / H≤0.5, the centrifugal wind wheel 100 has a large air volume, uniform air flow and low air noise.

[0054] According to some embodiments of the present invention, the radially inner edge of the blade 130 located on the shaft core 110 is located on a cylindrical surface. It should be noted that a cylindrical surface is a curved surface formed by the parallel movement of a straight line along a fixed curve, that is, a curved surface formed by the parallel movement of a moving straight line along a fixed curve. The moving straight line is called the straight generatrix of the cylindrical surface, and the fixed curve is called the directrix of the cylindrical surface. When the directrix is ​​a circle, the resulting cylindrical surface is called a cylindrical surface. The end of the rib 140 connected to the base plate 120 is located on a first circle, and the "first circle" here refers to a circular curve, and the end of the rib 140 connected to the base plate 120 is located on the circular curve. Among them, the diameter of the first circle is smaller than the diameter of the cylindrical surface, and the diameter of the first circle is greater than 0.8 times the diameter of the cylindrical surface. For example, as Figure 6 As shown, the diameter of the first circle is d1, and the diameter of the cylindrical surface is di, wherein 0.8di<d1<di.

[0055] In some embodiments, the end of the rib 140 connected to the shaft core 110 is located on a second circle, and the diameter of the second circle is greater than or equal to 50 mm. It should be noted that the "second circle" refers to a circular curve, and the end of the rib 140 connected to the shaft core 110 is located on the circular curve. Figure 6 As shown, the diameter of the second circle is d2, where d2 ≥ 50 mm. In some embodiments, the end of the rib 140 connected to the shaft core 110 is located on the second circle, and the diameter of the second circle is greater than 0.5 times the diameter of the first circle. It should be noted that the "second circle" refers to a circular curve, and the end of the rib 140 connected to the shaft core 110 is located on the circular curve. For example, Figure 6 As shown, the diameter of the first circle is d1, and the diameter of the second circle is d2, wherein d2>0.5d1.

[0056] According to some embodiments of the present invention, the width of the rib 140 in the circumferential direction of the shaft core 110 is 2-10 mm. Figure 6As shown, the width of the rib 140 in the circumferential direction of the shaft core 110 is B, where 2≤B≤10 mm. In some embodiments, the thickness of the rib 140 is 2-4 mm. Figure 3 , Figure 5 As shown, the thickness of the rib 140 is δ, where 2≤δ≤4 mm. In some embodiments, the distance between any two adjacent ribs 140 may be 2-40 mm.

[0057] According to some embodiments of the present invention, in the axial direction of the shaft core 110, the vertical distance between one end of the rib 140 and the other end of the rib 140 is 20-100 mm. Figure 3 , Figure 5 As shown, in the axial direction of the shaft core 110, the vertical distance between one end of the rib 140 and the other end of the rib 140 is h, where 20≤h≤100mm. In some embodiments, in the axial direction of the shaft core 110, the ratio of the vertical distance between one end of the rib 140 and the other end of the rib 140 to the height of the centrifugal wind wheel 100 in the axial direction of the shaft core 110 is 0.2-0.8. It can be understood that in the axial direction of the shaft core 110, the distance from one end of the rib 140 to the other end of the rib 140 is h; the height of the centrifugal wind wheel 100 in the direction of the shaft core 110 (the axial direction of the shaft core 110) is H, where 0.2≤h / H≤0.8.

[0058] According to some embodiments of the present invention, the blade 130 is spaced apart from the rib 140, and the minimum distance from any point on the blade 130 to the rib 140 is less than or equal to 20 mm. In other words, the minimum distance A from any point on the blade 130 to the rib 140, where A≤20 mm. It should be noted that the "minimum distance from any point on the blade 130 to the rib 140" here can be understood as that there is a point M on the blade 130, the distance from point M to the rib 140 is N1, and the distance from the remaining points on the blade 130 to the rib 140 is N2, where N1<N2, and N1 here is the minimum distance A from any point on the blade 130 to the rib 140.

[0059] like Figure 3 , Figure 5 As shown, according to some embodiments of the present invention, the rib 140 may include a first section 141, a second section 142, and a third section 143 connected in sequence, and the first section 141 is connected to the bottom plate 120. In the direction from the first section 141 to the third section 143, the first section 141 is offset toward the radial inner side of the shaft core 110, and the angle between the first section 141 and the radial inner edge of the blade 130 is 2°-20°. For example, Figure 3 , Figure 7As shown, the included angle a between the first section 141 and the radial inner edge of the blade 130 is 2°≤a≤20°.

[0060] like Figure 5 As shown, in some embodiments, in the direction from the first segment 141 to the third segment 143, the second segment 142 is offset toward the radial inner side of the shaft core 110, and the angle between the second segment 142 and the radial inner edge of the blade 130 is 15°-60°. Figure 3 As shown, an angle b between the second section 142 and the radial inner edge of the blade 130 is 16°≤b≤60°.

[0061] In some embodiments, Figure 5 As shown, there is a first fillet between the first section 141 and the bottom plate 120, and the radius r1 of the first fillet is less than 10 mm; there is a second fillet between the first section 141 and the second section 142, and the radius r2 of the second fillet is less than 10 mm; there is a third fillet between the third section 143 and the second section 142, and the radius r3 of the third fillet is less than 10 mm. Thus, the rib 140 can form the maximum accommodation space for the motor 210, with little effect on the fluid flow and air volume, and good manufacturing and processing performance.

[0062] like Figure 5 As shown, according to some embodiments of the present invention, the second section 142 may extend along a straight line or along an arc line. When the second section 142 extends along an arc line, the radius of the second section 142 may be R. Thus, the rib 140 may form a maximum accommodation space for the motor 210, with little effect on fluid flow and air volume, and good manufacturing and processing performance.

[0063] Refer to the following Figure 1-Figure 13 The centrifugal wind wheel 100 according to the embodiment of the present invention is described in detail. It is worth noting that the following description is only for exemplary purposes and is not a specific limitation to the present invention.

[0064] like Figure 1 As shown, the centrifugal wind wheel 100 includes a shaft core 110, a bottom plate 120, a plurality of blades 130, a reinforcing ring 150 and a plurality of ribs 140. Among them, there are 43 ribs 140. The bottom plate 120 is annular, and the bottom plate 120 is outer-mounted on the shaft core 110, the bottom plate 120 and the shaft core 110 are spaced apart in the radial direction of the shaft core 110, the reinforcing ring 150 and the bottom plate are spaced apart in the axial direction of the shaft core 110, and the reinforcing ring 150 is arranged at the other end of the blade 130.

[0065] like Figure 3 , Figure 5As shown, the edge of the blade 130 located on the radial inner side of the shaft core 110 is located on a cylindrical surface, the end of the rib 140 connected to the bottom plate 120 is located on a first circle, and the end of the rib 140 connected to the shaft core 110 is located on a second circle. The rib 140 may include a first section 141, a second section 142, and a third section 143 connected in sequence, and the first section 141 is connected to the bottom plate 120. In the direction from the first section 141 to the third section 143, the first section 141 is offset toward the radial inner side of the shaft core 110. There is a first fillet between the first section 141 and the bottom plate 120, a second fillet between the first section 141 and the second section 142, and a third fillet between the third section 143 and the second section 142. The second section 142 extends along an arc line.

[0066] The dimensions of various parts of the centrifugal wind wheel 100 are as follows:

[0067] The radial outer diameter of the reinforcement ring 150 is DO, where DO≤250mm;

[0068] The radial outer diameter of the bottom plate 120 is DI, where DI<DO;

[0069] The height of the centrifugal wind wheel 100 in the direction of the shaft core 110 is H, where DO / H≤0.5;

[0070] The diameter of the first circle is d1, and the diameter of the cylindrical surface is di, where 0.8di<d1<di;

[0071] The diameter of the second circle is d2, where d2≥50mm and d2>0.5d1;

[0072] The width of the rib 140 in the circumferential direction of the shaft core 110 is B, where 2≤B≤10 mm;

[0073] The thickness of the rib 140 is δ, where 2≤δ≤4 mm;

[0074] In the axial direction of the shaft core 110 , the vertical distance between one end of the rib 140 and the other end of the rib 140 is h, where 20≤h≤100mm;

[0075] The height of the centrifugal wind wheel 100 in the axial direction of the shaft core 110 is H, that is, the height of the centrifugal wind wheel 100 is H, wherein 0.2≤h / H≤0.8;

[0076] The minimum distance A from any point on the blade 130 to the rib 140, where A≤20 mm;

[0077] An angle a between the first section 141 and the radially inner edge of the blade 130 , wherein 2°≤a≤20°;

[0078] An angle b between the second section 142 and the radially inner edge of the blade 130 , wherein 16°≤b≤60°;

[0079] The radius r1 of the first fillet is less than 10 mm;

[0080] The radius r2 of the second fillet is less than 10 mm;

[0081] The radius r3 of the third rounded corner is less than 10 mm.

[0082] The noise spectrum of the centrifugal wind wheel in the prior art and the centrifugal wind wheel 100 of this embodiment is compared as follows: Figure 8-Figure 13 As shown, Figure 8-Figure 10 is the noise spectrum of the centrifugal wind wheel in the prior art; Figure 11-13 : This is the noise spectrum of the centrifugal impeller 100 of this embodiment. It should be noted that, the centrifugal impellers of the prior art and the centrifugal impellers 100 of this embodiment are tested according to the method of GB\T7725-2004 "Room Air Conditioner" to obtain the corresponding noise spectrum, wherein the noise increment should be measured using a Type I or higher precision sound level meter.

[0083] Specifically, Figure 8 and Fig.11 This is the spectrum obtained under the conditions of 1200 / 60=20Hz, 20*5=100Hz, 20*5*3=300Hz, where 100Hz is generated by the base frequency of the power supply 50Hz. Figure 8 The area indicated by the middle circle has noise spikes, that is, prominent peaks at 100Hz and 300Hz.

[0084] Fig. 9 and Fig.12 The spectrum is obtained under the conditions of 1100 / 60=18.33Hz, 18.33*5=91.67Hz, 18.33*5*3=275Hz, where 100Hz is generated by the base frequency of the power supply 50Hz. Fig. 9 Noise spikes are produced in the areas indicated by the middle circles, i.e., prominent peaks are produced at 92Hz, 100Hz, and 275.9Hz.

[0085] Fig.10 and Fig.13 The spectrum is obtained under the conditions of 1000 / 60=16.67Hz; 16.67*5=83.33Hz; 16.67*5*3=250Hz, where 100Hz is generated by the base frequency of 50Hz power supply. Fig.10 Noise spikes are produced in the areas indicated by the middle circles, i.e., prominent peaks are produced at 83 Hz, 100 Hz, and 51.5 Hz.

[0086] It should be noted that by improving the number of ribs 140 and improving the above dimensions of the centrifugal wind wheel 100, not only can the sound quality of the wind from the centrifugal wind wheel 100 be improved, the excitation noise generated by the mounting structure of the ribs 140 and the motor 210 be reduced, but also the heat dissipation effect of the motor 210 can be improved to achieve the purpose of cooling the motor 210. In addition, the shape of the ribs 140 can construct a maximum accommodation space for the motor 210, while having little effect on the fluid flow and air volume, the overall thickness of the centrifugal wind wheel 100 is small, and the manufacturing and processing performance is good.

[0087] The air conditioner according to the embodiment of the present invention comprises a housing and the centrifugal fan wheel 100 as described above, wherein the centrifugal fan wheel 100 is disposed in the housing.

[0088] According to the air conditioner of the embodiment of the present invention, the bottom plate 120 and the shaft core 110 are connected by using the ribs 140, and the number of the ribs 140 is set to 13-26, thereby improving the sound quality and reducing the excitation noise generated by the ribs 140 and the installation structure of the motor 210. In addition, by changing the number of the ribs 140, the heat dissipation effect of the motor 210 can also be improved to achieve the purpose of cooling the motor 210.

[0089] In some embodiments, Figure 7 As shown, the air conditioner may include a bracket 220, a motor 210, and a motor base 230, wherein the bracket 220 is located on one side of the axis direction of the centrifugal wind wheel 100, and the bracket 220 is connected to the centrifugal wind wheel 100. The power output end of the motor 210 is connected to the shaft core 110 of the centrifugal wind wheel 100, and the motor 210 is located in the accommodation space defined by a plurality of ribs 140. The motor base 230 is outer-mounted on the motor 210, and the motor base 230 is located between the motor 210 and the ribs 140.

[0090] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0091] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A centrifugal wind wheel, characterized in that: include: Axis core; A bottom plate, the bottom plate is outermost on the shaft core, and the bottom plate and the shaft core are spaced apart along the radial direction of the shaft core; A plurality of blades, the blades are connected to the bottom plate, and the plurality of blades are spaced apart and distributed along the circumferential direction of the shaft core; A plurality of ribs, one end of each rib is connected to the bottom plate, the other end of each rib is connected to the shaft core, and the number of each rib is 13-60; The ribs include a first section, a second section and a third section connected in sequence, the first section is connected to the bottom plate, In the direction from the first section to the third section, the first section is offset toward the radial inner side of the shaft core, and the angle between the first section and the radial inner edge of the blade is 2°-20°; In the direction from the first section to the third section, the second section is offset toward the radial inner side of the shaft core, and the angle between the second section and the radial inner edge of the blade is 15°-60°; The second section extends along an arc line; The centrifugal wind wheel further includes a reinforcement ring, the reinforcement ring is spaced apart from the bottom plate along the axis direction of the shaft core, and the reinforcement ring is arranged at the other end of the blade; The radial outer diameter of the reinforcement ring is less than or equal to 250 mm; The diameter of the radial outer side of the bottom plate is smaller than the diameter of the radial outer side of the reinforcement ring; The ratio of the diameter of the radial outer side of the reinforcing ring to the height of the centrifugal wind wheel in the axial direction of the shaft core is less than or equal to 0.5; The edge of the blade located radially inward of the shaft core is located on a curved surface, which is a cylindrical surface; the line connecting the ends of the ribs connected to the bottom plate is located on a circle, which is a first circle; the diameter of the first circle is smaller than the diameter of the cylindrical surface, and the diameter of the first circle is greater than 0.8 times the diameter of the cylindrical surface; The connecting line of the ends of the ribs connected to the shaft core is located on another circle, which is a second circle, and the diameter of the second circle is greater than or equal to 50 mm; The diameter of the second circle is greater than 0.5 times the diameter of the first circle; The distance between any two adjacent ribs is 2-40 mm; The width of the rib in the circumferential direction of the shaft core is 2-10 mm; The thickness of the ribs is 2-4 mm; In the axial direction of the shaft core, the vertical distance between one end of the rib and the other end of the rib is 20-100 mm; In the axial direction of the shaft core, the ratio of the vertical distance between one end of the rib and the other end of the rib to the height of the centrifugal impeller in the axial direction of the shaft core is 0.2-0.8; The blade is spaced apart from the rib, and the minimum distance from any point on the blade to the rib is less than or equal to 20 mm; A first fillet is provided between the first section and the bottom plate, and the radius of the first fillet is less than 10 mm; A second rounded corner is provided between the first section and the second section, and the radius of the second rounded corner is less than 10 mm; A third rounded corner is provided between the third section and the second section, and a radius of the third rounded corner is less than 10 mm.

2. The centrifugal wind wheel according to claim 1, characterized in that: The bottom plate is ring-shaped.

3. The centrifugal wind wheel according to claim 2, characterized in that: The bottom plate is arranged at one end of the blade.

4. An air conditioner, characterized in that: include: case; A centrifugal wind wheel, wherein the centrifugal wind wheel is the centrifugal wind wheel according to any one of claims 1 to 3, and the centrifugal wind wheel is arranged in the shell.

Images