Impeller and fan equipment

Abstract

The utility model discloses an impeller and fan equipment, including hub, a plurality of blades and a first reinforcing portion, the hub is provided with hub groove, the plurality of blades are arranged on the peripheral side of the hub and are arranged along the circumferential direction of the hub at intervals, the first reinforcing portion is arranged in the hub groove and extends along the radial direction of the hub, and the first reinforcing portion is arranged in the hub groove and extends along the radial direction of the hub. And the height size of the first reinforcing part in the axial direction of the hub is gradually reduced in a stepped manner along the direction close to the axis of the hub. According to the impeller, under the conditions that the appearance of the blades is not changed and the air volume of the impeller is not guaranteed, vibration noise caused by the balance problem and the like when the impeller rotates is reduced, noise caused by resonance of the impeller and a motor is also reduced, the sound quality of equipment operation is improved, and the use experience of a user is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to fan technical field, specifically, a kind of impeller and a kind of fan equipment. BACKGROUND

[0002] Air conditioner is a kind of regulating and controlling equipment for adjusting indoor environmental parameters, in recent years, with the increasing demand of people for living environment, the popular rate of air conditioner is also higher and higher.But the air conditioner outdoor unit in prior art has big noise problem in use, reduces the use experience of air conditioner outdoor unit. SUMMARY

[0003] The utility model aims at at least in certain extent solve one of the technical problems in relevant technology.

[0004] Therefore, the utility model embodiment proposes a kind of impeller, the impeller reduces the vibration noise caused by balance problem etc.

[0005] The utility model embodiment further proposes a kind of fan equipment comprising the above-mentioned impeller.

[0006] The impeller of the utility model embodiment comprises:

[0007] Hub, the hub is equipped with hub slot;

[0008] Multiple blades, multiple the blade is located at the outer circumferential side of the hub and is arranged along the circumferential direction of the hub;

[0009] First reinforcing portion, the first reinforcing portion is located in the hub slot and extends along the radial direction of the hub, and the height dimension of the first reinforcing portion in the axial direction of the hub decreases step by step along the direction close to the axis of the hub.

[0010] In some embodiments, the blade has leading edge and trailing edge arranged oppositely in the circumferential direction of the hub, the intersection of the trailing edge and the hub determines a plane with the axis of the hub, and the first reinforcing portion is located in the plane.

[0011] In some embodiments, the hub includes an outer peripheral wall enclosing the hub slot, the height dimension of the outer peripheral wall in the axial direction varies along the circumferential direction of the hub, and the outer peripheral wall has a highest part with an upper limit value of height dimension, and the first reinforcing portion is connected with the highest part.

[0012] In some embodiments, a plurality of the highest portions are arranged along the circumferential direction of the hub, and a plurality of the first reinforcing portions are arranged along the circumferential direction of the hub, the inner sides of the plurality of the first reinforcing portions converging at the axial center of the hub, and the outer sides of the plurality of the first reinforcing portions being connected to the plurality of the highest portions one by one.

[0013] In some embodiments, a second reinforcing portion is arranged in the hub groove, the inner side of the second reinforcing portion converging at the axial center of the hub, and the outer side of the second reinforcing portion being connected to the outer peripheral wall between two adjacent highest portions.

[0014] In some embodiments, the height dimension of the second reinforcing portion along the axial direction decreases in the direction from the outer side to the inner side.

[0015] In some embodiments, the outer peripheral wall has a connecting portion connected to the second reinforcing portion, the height dimension of the outer side of the second reinforcing portion being consistent with the height dimension of the connecting portion, the axial center of the hub is provided with a cylindrical portion, the inner side of the second reinforcing portion is connected to the cylindrical portion, and the height dimension of the inner side of the second reinforcing portion is consistent with the height dimension of the cylindrical portion.

[0016] In some embodiments, the second reinforcing portion comprises a first segment and a second segment in the radial direction of the hub, the first segment being located at the outer side of the second segment, the height dimension of the first segment along the axial direction gradually decreases in the direction from the outer side to the inner side, and the height dimension of the second segment along the axial direction remains unchanged in the direction from the outer side to the inner side.

[0017] In some embodiments, the included angle between the first reinforcing portion and the second reinforcing portion in the circumferential direction of the hub is 20-40 degrees.

[0018] In some embodiments, the second reinforcing portion is provided with a plurality of second reinforcing portions arranged along the circumferential direction of the hub.

[0019] In some embodiments, the outer side of the outer peripheral wall is provided with a positioning groove for embedding a positioning portion of another impeller to achieve a limiting fit between the two impellers.

[0020] In some embodiments, the first reinforcing portion comprises a plurality of steps, the height dimension of the plurality of steps along the axial direction gradually decreases in the direction from the outer side to the inner side, and adjacent steps are connected in an arc transition.

[0021] In some embodiments, the steps are provided with three steps, the three steps being a first step, a second step and a third step arranged in the direction from the outer side to the inner side in sequence.

[0022] The width of the first step in the inner and outer directions is 7.6 mm to 11.1 mm, and the height of the first step in the axial direction is 14 mm to 21 mm;

[0023] And / or, the width of the second step in the inward and outward directions is 19.2 mm to 28.8 mm, and the height of the second step in the axial direction is 12.8 mm to 19.2 mm;

[0024] And / or, a width dimension of the third step in the inward-outward direction is 10.4 mm to 15.6 mm, and a height dimension of the third step in the axial direction is 12 mm to 18 mm.

[0025] In some embodiments, there are three steps, which are a first step, a second step, and a third step arranged in sequence from the outside to the inside, and a convex bulge is provided at the connection between the first step and the second step.

[0026] In some embodiments, the first step and the second step are connected by a first rounded corner transition, the second step and the third step are connected by a second rounded corner transition, and the curvature of the first rounded corner is not less than the curvature of the second rounded corner.

[0027] In some embodiments, the curvature of the first rounded corner is 0.26 to 0.4;

[0028] And / or, the curvature of the second rounded corner is 0.1 to 0.15.

[0029] In some embodiments, the blade is provided with a third reinforcement portion, and the third reinforcement portion is provided at the leading edge of the blade. The third reinforcement portion includes a reinforcement portion adjacent to the hub, and the width dimension of the reinforcement portion in the circumferential direction of the hub gradually increases along the direction adjacent to the hub, and a groove for weight reduction is provided in the reinforcement portion.

[0030] The fan device of the embodiment of the present invention includes the impeller as described in any of the above embodiments.

[0031] In some embodiments, the fan device is an air conditioner outdoor unit, a fan or an industrial fan.

[0032] Beneficial effects: The impeller and fan equipment of the embodiment of the utility model reduces the vibration noise caused by balance problems when the impeller rotates without changing the blade shape and ensuring the impeller air volume, and also reduces the noise caused by resonance between the impeller and the motor, thereby improving the sound quality of the equipment operation and enhancing the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the impeller of an embodiment of the utility model.

[0034] Figure 2 yes Figure 1 Schematic diagram of the part of the middle impeller at the hub.

[0035] Figure 3 yes Figure 2 Schematic diagram of the step of the first reinforcement part.

[0036] Figure 4 Schematic diagram of the convex hull of an embodiment of the present invention.

[0037] Figure 5 It is a schematic diagram of the third reinforcement portion of the impeller according to an embodiment of the present utility model.

[0038] Figure 6 3 is a noise comparison curve diagram of the impeller of the embodiment of the present utility model.

[0039] Reference numerals:

[0040] 1- hub; 11- hub groove; 12- peripheral wall; 121- highest part; 122- connection part; 123- positioning groove; 13- columnar part;

[0041] 2-blade; 21-leading edge; 22-trailing edge; 23-third reinforcement portion; 231-reinforcement portion; 2311-groove;

[0042] 3-first reinforcement; 31-step; 311-first step; 312-second step; 313-third step; 32-convex hull; 33-first rounded corner; 34-second rounded corner;

[0043] 4- second reinforcement portion; 41- first section; 42- second section. DETAILED DESCRIPTION

[0044] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0045] like Figure 1 As shown, the impeller of the embodiment of the present invention includes a hub 1 , a plurality of blades 2 and a first reinforcement portion 3 .

[0046] The hub 1 is provided with a hub groove 11, for example Figure 1 As shown, the material of the hub 1 can be plastic, etc., and the hub 1 can be roughly a cap-shaped structure. The hub groove 11 is the internal space surrounded by the hub 1, and the hub groove 11 can be coaxially arranged with the hub 1, and the notch of the hub groove 11 can be located at one axial end of the hub 1.

[0047] A plurality of blades 2 are provided on the outer peripheral side of the hub 1 and are spaced apart along the circumference of the hub 1. For example, Figure 1 As shown, there may be three blades 2, which may be integrally formed on the outer circumference of the hub 1 by injection molding, and the three blades 2 may be evenly spaced along the circumference of the hub 1. In other embodiments, there may be four, five, six, or other numbers of blades 2.

[0048] The first reinforcement portion 3 is disposed in the hub groove 11 and extends along the radial direction of the hub 1 , and the height dimension of the first reinforcement portion 3 in the axial direction of the hub 1 decreases stepwise in a direction approaching the axis of the hub 1 .

[0049] For example, Figure 2 As shown, the first reinforcement part 3 can be integrally formed in the hub groove 11 by injection molding. The first reinforcement part 3 as a whole can be a rib plate structure and is located in the axial plane of the hub 1. The outer side of the first reinforcement part 3 can be connected to the inner groove wall of the hub groove 11, and the inner side of the first reinforcement part 3 can be connected to the component at the axis of the hub 1.

[0050] like Figure 2 As shown, the first reinforcement portion 3 as a whole may be in a stepped shape, that is, the height dimension of the first reinforcement portion 3 in the axial direction decreases in a stepped manner along the direction from the outside to the inside.

[0051] The impeller of the embodiment of the utility model can change the overall natural frequency of the impeller when it rotates by adding a stepped first reinforcement portion 3 in the hub groove 11, so that the impeller can avoid or stay away from the excitation source frequency, reducing or eliminating the probability of resonance with the motor, and thus avoiding the noise problem caused by the resonance of the impeller and the motor.

[0052] Secondly, the first reinforcement portion 3 is arranged inside the hub 1. Compared with the prior art in which some reinforcement structures are arranged on the blade 2, the appearance of the blade 2 of the utility model does not change, which is conducive to simplifying the overall structural shape of the blade 2, facilitating processing and production, and reducing manufacturing difficulty.

[0053] In addition, the first reinforcement portion 3 is arranged close to the axis of the hub 1, which is beneficial to reducing the influence of the first reinforcement portion 3 on the rotation of the impeller due to the centrifugal force, thereby avoiding the situation where the impeller is easily unbalanced in the rotation state due to the processing differences of the above-mentioned reinforcement structure, thereby avoiding the vibration and noise problems caused by balance problems, etc., and further improving the user experience.

[0054] In some embodiments, the blade 2 has a leading edge 21 and a trailing edge 22 arranged opposite to each other in the circumferential direction of the hub 1 , the intersection of the trailing edge 22 and the hub 1 and the axis of the hub 1 define a plane, and the first reinforcement 3 is provided in the plane.

[0055] For example, Figure 1 As shown, each blade 2 has a leading edge 21 and a trailing edge 22, wherein the leading edge 21 can be a concave curve, and the trailing edge 22 can be a convex curve. The connection between the trailing edge 22 and the hub 1 forms an intersection, and the axis of the hub 1 is the central axis of the hub 1. A plane can be determined by the intersection and the central axis of the hub 1. The first reinforcement portion 3 can be flat as a whole and can be located in the plane determined as above.

[0056] In this way, the trailing edge 22 of the blade 2 can be connected to the first reinforcement part 3 as a whole, so that the force of the blade 2 can be transferred to the first reinforcement part 3 via the trailing edge 22, which is conducive to achieving balanced decomposition of the force and ensuring the stability of the overall structure of the impeller.

[0057] In some embodiments, the wheel hub 1 includes an outer peripheral wall 12 that forms a hub groove 11. The axial height dimension of the outer peripheral wall 12 fluctuates along the circumference of the wheel hub 1, and the outer peripheral wall 12 has a highest portion 121 with an upper limit value of the height dimension. The first reinforcement portion 3 is connected to the highest portion 121.

[0058] For example, Figure 2 As shown, the hub 1 may include a disc-shaped end wall and a peripheral wall 12 arranged on the outer peripheral side of the end wall. The peripheral wall 12 may be cylindrical as a whole and extend along the axial direction of the hub 1. The end wall may be arranged at one axial end of the peripheral wall 12.

[0059] In the axial direction, the height of the outer peripheral wall 12 may fluctuate up and down along the circumference of the hub 1, that is, the height of the outer peripheral wall 12 is not unique. Figure 2 As shown, the peripheral wall 12 has a highest portion 121 with a maximum height, and the outer side of the first reinforcement 3 can be connected to the highest portion 121. Because the highest portion 121 is connected between the blade 2 and the first reinforcement 3, the highest portion achieves dimensional matching at the connection between the blade 2, the hub 1, and the first reinforcement 3, thereby facilitating improved force distribution and overall structural stability.

[0060] In some embodiments, there are multiple highest parts 121 and multiple first reinforcement parts 3, and the multiple highest parts 121 are arranged at intervals along the circumference of the hub 1. The inner sides of the multiple first reinforcement parts 3 all intersect at the axis of the hub 1, and the outer sides of the multiple first reinforcement parts 3 are connected to the multiple highest parts 121 one by one.

[0061] For example, Figure 2As shown, three highest portions 121 and three first reinforcement portions 3 can each be provided. The three highest portions 121 can be evenly spaced along the circumference of the outer peripheral wall 12, and the three first reinforcement portions 3 can also be evenly spaced along the circumference of the hub 1. The inner side of each first reinforcement portion 3 can converge at the axis of the hub 1, specifically connecting to the subsequent cylindrical portion 13 of the hub 1. The outer side of each first reinforcement portion 3 can be connected to the corresponding highest portion 121. This ensures the central symmetry of the impeller's overall structure, which in turn helps ensure balance during rotation and reduce noise.

[0062] In some other embodiments, the highest portion 121 and the first reinforcement portion 3 may also be provided in four, five or other numbers.

[0063] In some embodiments, the impeller includes a second reinforcement portion 4, which is arranged in the hub groove 11, the inner side of the second reinforcement portion 4 intersects with the axis of the hub 1, and the outer side of the second reinforcement portion 4 is connected to the outer peripheral wall 12 between the two adjacent highest parts 121.

[0064] For example, Figure 2 As shown, the second reinforcement portion 4 can also be in the shape of a rib plate, and the second reinforcement portion 4 can also be integrally formed in the hub groove 11 by injection molding. The second reinforcement portion 4 can also extend along the radial direction (inside-outside direction) of the wheel hub 1, wherein the outer side of the second reinforcement portion 4 can be connected to the inner groove wall of the hub groove 11, and the inner side of the second reinforcement portion 4 can be connected to the axis of the wheel hub 1, and the second reinforcement portion 4 can be located between two adjacent first reinforcement portions 3.

[0065] The provision of the second reinforcement portion 4 can, on the one hand, further enhance the structural strength of the hub 1, and on the other hand, is also conducive to further changing the overall natural frequency of the impeller during rotation, thereby allowing the impeller to avoid or stay away from the excitation source frequency, further reducing or eliminating the probability of resonance with the motor and improving the resonance noise situation.

[0066] In some embodiments, the height dimension of the second reinforcement portion 4 in the axial direction decreases from the outside to the inside. Figure 2 As shown, the direction from outside to inside is the direction gradually approaching the axis of the hub 1. Along the direction from outside to inside, the height dimension of the whole or part of the second reinforcement part 4 can be gradually reduced. Since there is a size difference between the above-mentioned outer peripheral wall 12 and the axis of the hub 1 in the axial direction, this size design of the second reinforcement part 4 is conducive to achieving a slow transition of the size difference, thereby helping to improve the overall structural strength.

[0067] In some embodiments, the peripheral wall 12 has a connection portion 122 connected to the second reinforcement portion 4, for example, Figure 2As shown, the connection portion 122 is the position where the outer peripheral wall 12 is connected to the outer side of the second reinforcement portion 4. The height dimension (axial direction) of the outer side of the second reinforcement portion 4 is consistent with the height dimension (axial direction) of the connection portion 122.

[0068] like Figure 2 As shown, the hub 1 is provided with a cylindrical portion 13 at its axis. The cylindrical portion 13 can be generally annular and cylindrical. The inner side of the second reinforcement portion 4 is connected to the outer circumference of the cylindrical portion 13, and the height dimension of the inner side of the second reinforcement portion 4 is consistent with the height dimension of the cylindrical portion 13. As a result, the height dimension of the second reinforcement portion 4 can match the outer circumferential wall 12 and the cylindrical portion 13, ensuring the structural strength of the connection and facilitating the decomposition and transmission of the force applied to the blade 2.

[0069] In some embodiments, as Figure 2 As shown, the second reinforcement portion 4 includes a first section 41 and a second section 42 in the radial direction of the hub 1 . The first section 41 and the second section 42 can be integrally formed by injection molding, wherein the first section 41 is located outside the second section 42 .

[0070] The axial height of the first section 41 gradually decreases from the outside to the inside, while the axial height of the second section 42 remains constant from the outside to the inside. This facilitates the transition between the dimensional differences between the outer peripheral wall 12 and the cylindrical portion 13 of the second reinforcement portion 4. Furthermore, this design further reduces noise.

[0071] In some embodiments, the angle formed by the first reinforcement portion 3 and the second reinforcement portion 4 in the circumferential direction of the hub 1 is 20 to 40 degrees. For example, the angle formed by the first reinforcement portion 3 and the second reinforcement portion 4 can be angle a, and angle a can be 20 degrees, 25 degrees, 30 degrees, 35 degrees, 40 degrees, etc.

[0072] The restriction of the angle between the first reinforcement part 3 and the second reinforcement part 4 can enable the second reinforcement part 4 to be closer to the trailing edge 22 of the blade 2, thereby enhancing the supporting structural strength of the trailing edge 22 of the blade 2, and also conducive to enhancing the force relief and conduction effect of the blade 2.

[0073] In some embodiments, multiple second reinforcement portions 4 are provided, and the multiple second reinforcement portions 4 are arranged at intervals along the circumference of the hub 1. For example, three second reinforcement portions 4 may be provided, and the three second reinforcement portions 4 may be arranged at equal intervals along the circumference of the hub 1, and the three second reinforcement portions 4 and the three first reinforcement portions 3 may be arranged alternately one by one along the circumference of the hub 1.

[0074] In other embodiments, the number of the second reinforcing portions 4 can also be a multiple of the number of the first reinforcing portions 3, for example, the number of the second reinforcing portions 4 can be twice the number of the first reinforcing portions 3, at this time, two or more second reinforcing portions 4 can be arranged between any two adjacent first reinforcing portions 3.

[0075] In some embodiments, the outer side of the outer peripheral wall 12 is provided with a positioning groove 123, which is used for embedding the positioning portion of another impeller to achieve the limiting fit between the two impellers.

[0076] For example, as shown in Figure 2 The positioning groove 123 can be integrally formed on the outer side of the outer peripheral wall 12 by injection molding, and the hub 1 of another impeller can be provided with a positioning portion which can be embedded in the positioning groove 123. The rotation of the two impellers can be stopped by the cooperation of the positioning portion and the positioning groove 123, thereby ensuring the structural stability during transportation and storage.

[0077] In some embodiments, the first reinforcing portion 3 includes a plurality of steps 31, for example, as shown in Figure 2 The first reinforcing portion 3 can be provided with two, three, four, five or the like number of steps 31, and the height dimension of the plurality of steps 31 in the axial direction gradually decreases along the direction from the outside to the inside, thereby realizing the transition of the size difference between the highest part 121 of the outer peripheral wall 12 and the above-mentioned cylindrical portion 13.

[0078] The adjacent two steps 31 are connected in an arc shape, for example, any two adjacent steps 31 can be connected by a curve such as a circular arc, thereby facilitating the avoidance of stress concentration and improving the overall structural strength of the first reinforcing portion 3.

[0079] It should be noted that the arrangement of the plurality of steps 31 can weaken the force and torque transmitted from the motor shaft (axial center) layer by layer, which can improve the weakening effect compared to the design of a single step, and can also make the weakening process gradual, avoiding the situation that the structure is unstable due to the sudden drop of force and torque.

[0080] Secondly, compared with the structure adopting a circular arc, the design of the plurality of steps 31 is more consistent with the stress and vibration conditions during the rotation of the impeller, thereby better reducing the generation of vibration and noise.

[0081] In some embodiments, as shown in Figure 3 The step 31 of the first reinforcing portion 3 is provided with three, and the three steps 31 are a first step 311, a second step 312 and a third step 313 arranged in the direction from the outside to the inside in sequence.

[0082] The width of the first step 311 in the inner and outer directions is 7.6 mm to 11.1 mm, and the height of the first step 311 in the axial direction is 14 mm to 21 mm. Figure 3 As shown, the width dimension of the first step 311 in the inward and outward directions may be dimension L1, which may be 7.6 mm, 8 mm, 8.5 mm, 9 mm, 9.5 mm, 10 mm, 10.5 mm, 11.1 mm, etc. The height dimension of the first step 311 in the axial direction may be dimension H1, which may be 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 20 mm, 21 mm, etc.

[0083] Preferably, the dimension L1 is 9.5 mm and the dimension H1 is 17.5 mm.

[0084] In some embodiments, the width of the second step 312 in the inner and outer directions is 19.2 mm to 28.8 mm, and the height of the second step 312 in the axial direction is 12.8 mm to 19.2 mm. Figure 3 As shown, the width dimension of the second step 312 in the inward and outward directions may be dimension L2, which may be 19.2 mm, 20 mm, 21 mm, 22 mm, 23 mm, 24 mm, 25 mm, 26 mm, 27 mm, 28 mm, 28.8 mm, etc. The height dimension of the second step 312 in the axial direction may be dimension H2, which may be 12.8 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19.2 mm, etc.

[0085] Preferably, the dimension L2 is 24 mm and the dimension H2 is 16 mm.

[0086] In some embodiments, the width of the third step 313 in the inner and outer directions is 10.4 mm to 15.6 mm, and the height of the third step 313 in the axial direction is 12 mm to 18 mm. Figure 3 As shown, the width dimension of the third step 313 in the inward and outward directions may be dimension L3, which may be 10.4 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 15.6 mm, etc. The height dimension of the third step 313 in the axial direction may be dimension H3, which may be 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, etc.

[0087] Preferably, the dimension L3 is 13 mm and the dimension H3 is 15 mm.

[0088] Designing the first step 311 , the second step 312 , and the third step 313 within the aforementioned size range is beneficial for further improving the structural strength of the first reinforcement portion 3 and further reducing noise.

[0089] In some embodiments, a convex hull 32 is provided at the connection between the first step 311 and the second step 312. Figure 4 As shown, the bulge 32 can be integrally formed at the connection between the first step 311 and the second step 312 by injection molding. On the one hand, the provision of the bulge 32 can enhance the structural strength of the connection between the first step 311 and the second step 312. On the other hand, when two impellers are stacked, the bulge 32 of one impeller can be plugged into and matched with the corresponding groove structure on the other impeller, thereby enhancing the structural stability of the stacking of the two impellers and facilitating the stacking and transportation of multiple impellers.

[0090] In some embodiments, the first step 311 and the second step 312 are connected by a first rounded corner 33 , and the second step 312 and the third step 313 are connected by a second rounded corner 34 . The curvature of the first rounded corner 33 is not less than the curvature of the second rounded corner 34 .

[0091] For example, Figure 4 As shown, the first fillet 33 and the second fillet 34 can both be substantially arc-shaped. The vertical surface of the first step 311 and the plane of the second step 312 can be smoothly connected by the first fillet 33, and the vertical surface of the second step 312 and the plane of the third step 313 can be smoothly connected by the second fillet 34. This can make the overall structure of the first reinforcement portion 3 smoother and can also eliminate stress concentration between the two steps.

[0092] The curvature of the first fillet 33 can be greater than the curvature of the second fillet 34, that is, the radius of the circle corresponding to the first fillet 33 is smaller than the radius of the circle corresponding to the second fillet 34. The smaller the curvature near the axis of the hub 1, the smoother the connection transition between the two steps 31, thereby fully meeting the requirements of bearing the larger force and torque at the axis, and further making the curvature changes of different fillets adapt to the direction of weakening of force and torque.

[0093] In some embodiments, the curvature of the first rounded corner 33 is 0.26 to 0.4. For example, the curvature of the first rounded corner 33 can be 0.26, 0.264, 0.270, 0.280, 0.290, 0.300, 0.310, 0.320, 0.330, 0.340, 0.350, 0.360, 0.380, 0.390, 0.396, 0.4, etc. Preferably, the curvature of the first rounded corner 33 is 0.33.

[0094] In some embodiments, the curvature of the second rounded corner 34 is 0.1 to 0.15. For example, the curvature of the second rounded corner 34 can be 0.1, 0.11, 0.12, 0.13, 0.14, 0.15, etc. Preferably, the curvature of the second rounded corner 34 is 0.125.

[0095] Thus, while meeting the structural strength requirements, standardized processing of the first reinforcement portion can be achieved. In some embodiments, the blade 2 is provided with a third reinforcement portion 23, which is provided at the leading edge 21 of the blade 2. The third reinforcement portion 23 includes a reinforcement portion 231 adjacent to the hub 1. The width of the reinforcement portion 231 in the circumferential direction of the hub 1 gradually increases in the direction adjacent to the hub 1, and a groove 2311 for reducing weight is provided in the reinforcement portion 231.

[0096] For example, Figure 5 As shown, the leading edge 21 of each blade 2 can be provided with a third reinforcement portion 23, the second reinforcement portion 4 as a whole can be a rib structure, and the third reinforcement portion 23 can be extended along the leading edge 21 of the blade 2, thereby enhancing the structural strength of the leading edge 21.

[0097] like Figure 5 As shown, a reinforcement portion 231 can be integrally formed on the inner side of the third reinforcement portion 23. The reinforcement portion 231 can be triangular as a whole, and the width of the reinforcement portion 231 in the circumferential direction of the hub 1 gradually increases from the outside to the inside, thereby enhancing the structural strength of the angle between the blade 2 and the hub 1.

[0098] like Figure 5 As shown, the reinforcement portion 231 can generally include three ribs, which can be arranged at intervals in the circumferential direction of the hub 1. A groove 2311 is formed between any two adjacent ribs. The groove 2311 can reduce weight and also reduce the material consumption of the second reinforcement portion 4.

[0099] In some embodiments, a fourth reinforcement portion may be further provided in the hub groove 11 . The number of the fourth reinforcement portions may be the same as the number of the first reinforcement portions 3 , and the plurality of fourth reinforcement portions may be arranged at equal intervals along the circumference of the wheel hub 1 .

[0100] The following describes the fan equipment according to the embodiment of the present invention.

[0101] The fan device of the embodiment of the present invention includes an impeller, which can be an impeller as described in any of the above embodiments. The fan device is an air conditioner outdoor unit. In other embodiments, the fan device can also be a fan, an industrial fan, etc.

[0102] like Figure 6As shown, after actual monitoring, the total noise of the air-conditioning outdoor unit using the impeller of the embodiment of the utility model is approximately 33.7, while the total noise of the air-conditioning outdoor unit using the existing impeller without the above-mentioned reinforcement part is approximately 35.1, and the overall noise is reduced by 1.4d (A).

[0103] Secondly, Figure 6 Including the noise spectrum diagram, by comparing the optimized frequency-noise curve A and the frequency-noise curve B of the prior art in the noise spectrum diagram, it can be seen that the noise peak at 250Hz is reduced by 16.12d(A), and the sound quality is greatly improved compared with the prototype impeller.

[0104] In addition, compared to the prototype impeller, the optimized impeller of the present invention has a higher natural frequency during rotation, avoiding the resonance point with the motor. Table 1 below is a comparison table of the natural frequencies of the prototype and improved impellers.

[0105] Table 1 Natural frequency comparison table

[0106]

[0107] Although the above embodiments have been shown and described, it is understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments made by ordinary technicians in this field are all within the scope of protection of the present invention.

Claims

1. An impeller, characterized in that: include: A wheel hub (1), wherein the wheel hub (1) is provided with a hub groove (11); a plurality of blades (2), the plurality of blades (2) being provided on the outer peripheral side of the hub (1) and spaced apart along the circumference of the hub (1); A first reinforcement portion (3), the first reinforcement portion (3) is arranged in the hub groove (11) and extends along the radial direction of the hub (1), and the height dimension of the first reinforcement portion (3) in the axial direction of the hub (1) decreases in steps along the direction close to the axis of the hub (1).

2. The impeller according to claim 1, characterized in that The blade (2) has a leading edge (21) and a trailing edge (22) arranged opposite to each other in the circumferential direction of the hub (1); an intersection of the trailing edge (22) and the hub (1) and the axis of the hub (1) define a plane; and the first reinforcement portion (3) is provided in the plane.

3. The impeller according to claim 2, characterized in that The wheel hub (1) comprises an outer peripheral wall (12) surrounding the hub groove (11); the height dimension of the outer peripheral wall (12) in the axial direction fluctuates along the circumference of the wheel hub (1); and the outer peripheral wall (12) has a highest portion (121) whose height dimension takes an upper limit value; and the first reinforcement portion (3) is connected to the highest portion (121).

4. The impeller according to claim 3, characterized in that There are multiple highest parts (121) and multiple first reinforcement parts (3), and the multiple highest parts (121) are arranged at intervals along the circumference of the hub (1). The inner sides of the multiple first reinforcement parts (3) all intersect with the axis of the hub (1), and the outer sides of the multiple first reinforcement parts (3) are connected to the multiple highest parts (121) in a one-to-one correspondence.

5. The impeller according to claim 3, characterized in that The invention comprises a second reinforcement portion (4), wherein the second reinforcement portion (4) is arranged in the hub groove (11), the inner side of the second reinforcement portion (4) intersects with the axis of the wheel hub (1), and the outer side of the second reinforcement portion (4) is connected to the outer peripheral wall (12) between two adjacent highest parts (121).

6. The impeller according to claim 5, characterized in that The height dimension of the second reinforcement portion (4) in the axial direction decreases from the outside to the inside.

7. The impeller according to claim 6, characterized in that The outer peripheral wall (12) has a connection portion (122) connected to the second reinforcement portion (4), and the height dimension of the outer side of the second reinforcement portion (4) is consistent with the height dimension of the connection portion (122). The axis of the wheel hub (1) is provided with a columnar portion (13), the inner side of the second reinforcement portion (4) is connected to the columnar portion (13), and the height dimension of the inner side of the second reinforcement portion (4) is consistent with the height dimension of the columnar portion (13).

8. The impeller according to claim 6, characterized in that The second reinforcement portion (4) comprises a first section (41) and a second section (42) in the radial direction of the hub (1), wherein the first section (41) is located outside the second section (42), and the height dimension of the first section (41) in the axial direction gradually decreases from the outside to the inside, while the height dimension of the second section (42) in the axial direction remains unchanged from the outside to the inside.

9. The impeller according to claim 6, characterized in that The angle formed by the first reinforcement portion (3) and the second reinforcement portion (4) in the circumferential direction of the hub (1) is 20 degrees to 40 degrees; And / or, a plurality of the second reinforcement parts (4) are provided, and the plurality of the second reinforcement parts (4) are arranged at intervals along the circumference of the hub (1).

10. The impeller according to claim 3, characterized in that A positioning groove (123) is provided on the outer side of the outer peripheral wall (12), and the positioning groove (123) is used for the positioning portion of another impeller to be embedded so as to achieve position-limiting cooperation between the two impellers.

11. The impeller according to claim 1, characterized in that The first reinforcement portion (3) comprises a plurality of steps (31), the height dimensions of the plurality of steps (31) in the axial direction gradually decrease from the outside to the inside, and two adjacent steps (31) are connected in an arc-shaped transition.

12. The impeller according to claim 11, characterized in that There are three steps (31), and the three steps (31) are respectively a first step (311), a second step (312) and a third step (313) arranged in sequence from the outside to the inside; The width of the first step (311) in the inner and outer directions is 7.6 mm to 11.1 mm, and the height of the first step (311) in the axial direction is 14 mm to 21 mm; And / or, the width of the second step (312) in the inner and outer directions is 19.2 mm to 28.8 mm, and the height of the second step (312) in the axial direction is 12.8 mm to 19.2 mm; And / or, the width dimension of the third step (313) in the inner and outer directions is 10.4 mm to 15.6 mm, and the height dimension of the third step (313) in the axial direction is 12 mm to 18 mm.

13. The impeller according to claim 11, characterized in that There are three steps (31), which are respectively a first step (311), a second step (312) and a third step (313) arranged in sequence from the outside to the inside, and a convex hull (32) is provided at the connection between the first step (311) and the second step (312).

14. The impeller according to claim 13, characterized in that The first step (311) and the second step (312) are transitionally connected via a first rounded corner (33), and the second step (312) and the third step (313) are transitionally connected via a second rounded corner (34), wherein the curvature of the first rounded corner (33) is not less than the curvature of the second rounded corner (34).

15. The impeller according to claim 14, characterized in that The curvature of the first rounded corner (33) is 0.26 to 0.4; And / or, the curvature of the second rounded corner (34) is 0.1 to 0.

15.

16. The impeller according to any one of claims 1 to 15, characterized in that The blade (2) is provided with a third reinforcement portion (23), the third reinforcement portion (23) being provided at a leading edge (21) of the blade (2), the third reinforcement portion (23) comprising a reinforcement portion (231) adjacent to the hub (1), the width dimension of the reinforcement portion (231) in the circumferential direction of the hub (1) gradually increasing in a direction adjacent to the hub (1), and a groove (2311) for reducing weight being provided in the reinforcement portion (231).

17. A fan device, characterized in that: The impeller comprises the impeller according to any one of claims 1 to 16.

18. The fan device according to claim 17, characterized in that: The fan device is an air conditioner outdoor unit, a fan or an industrial fan.

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