Impeller, fan and range hood

Abstract

This invention relates to the field of kitchen appliance technology, specifically disclosing an impeller, a fan, and a range hood. The impeller includes a central disc, blades, and reinforcing ribs. Both the blades and reinforcing ribs are disposed in the central disc, with the reinforcing ribs positioned closer to the center of the central disc than the blades. The reinforcing ribs include interconnected vertical ribs and deflecting ribs, with the deflecting ribs offset from the vertical ribs in a direction opposite to the impeller's rotation direction. The reinforcing ribs enhance the structural strength of the central disc, thereby reducing the required thickness. By offsetting the deflecting ribs relative to the vertical ribs in a direction opposite to the impeller's rotation direction, the rotational action of the blades aligns with the force direction of the deflecting ribs, ensuring the reliability of the deflecting ribs and further enhancing the structural strength of the central disc. This effectively reduces the required thickness of the central disc, thereby reducing material usage and lowering costs. It also reduces the weight of the central disc, improving the efficiency of the motor-driven impeller in extracting and exhausting fumes.

Description

Technical Field

[0001] This invention relates to the field of kitchen appliance technology, and in particular to an impeller, a fan, and a range hood. Background Technology

[0002] For the duct system of a range hood, the design of the impeller is crucial to the performance of the duct system.

[0003] In related technologies, impellers typically include a central disc and blades disposed on one or both sides of the central disc. The central disc is used for connection with the motor drive and requires high structural strength to ensure that it can reliably transmit the force provided by the motor to the blades. To address this, related technologies usually design the central disc to be relatively thick to ensure structural strength. However, this design results in a heavier central disc, reducing the efficiency of the motor-driven impeller in extracting and exhausting fumes. Furthermore, it leads to the use of more material in the central disc, resulting in higher processing costs for the impeller.

[0004] Therefore, there is an urgent need for an impeller, a fan, and a range hood to solve the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of this invention is to provide an impeller, a fan, and a range hood to solve the problem.

[0006] In a first aspect, the present invention provides an impeller comprising: Mid-game; Blades, the blades being disposed on the central disk; A reinforcing rib is provided on the central disc, and the reinforcing rib is close to the center of the central disc relative to the blade. The reinforcing rib includes vertical ribs and deflection ribs that are connected to each other, and the deflection ribs are offset relative to the vertical ribs. The direction of the offset of the deflection ribs relative to the vertical ribs is opposite to the rotation direction of the impeller.

[0007] As a preferred technical solution for the impeller, along the axial direction of the central disk, the deflection rib has a root connected to the central disk and a top away from the central disk, and the top is deflected relative to the root in a direction opposite to the rotation direction of the impeller.

[0008] As a preferred technical solution for the impeller, the deflection rib has an inner end close to the center of the central disk and an outer end far from the center of the central disk, and the outer end deflects relative to the inner end in a direction opposite to the rotation direction of the impeller.

[0009] As a preferred technical solution for the impeller, the vertical rib includes a first connecting end and a first misaligned end connected to the first connecting end, and along the rotation direction of the impeller, the first connecting end is located upstream of the first misaligned end; The first connecting end is connected to the deflection rib, the first misaligned end is exposed, and the area of ​​the first connecting end is not less than the area of ​​the first misaligned end.

[0010] As a preferred technical solution for the impeller, the deflection rib includes a second connecting end and a second misaligned end connected to the second connecting end, and along the rotation direction of the impeller, the second connecting end is located downstream of the second misaligned end; The second connecting end is connected to the vertical rib, the second misaligned end is exposed, and the area of ​​the second connecting end is not less than the area of ​​the second misaligned end.

[0011] As a preferred technical solution for the impeller, the height of the reinforcing rib gradually decreases from the center of the central disk towards the direction away from the center of the central disk.

[0012] As a preferred technical solution for the impeller, the impeller includes a plurality of reinforcing ribs, which are evenly distributed along the circumference of the central disk; and / or, the impeller includes a plurality of blades, which are evenly distributed along the circumference of the central disk.

[0013] As a preferred technical solution for the impeller, the central disk includes a first end face and a second end face arranged opposite to each other along its own axial direction; the plurality of blades includes a plurality of first blades and a plurality of second blades, the plurality of first blades are all disposed on the first end face, and the plurality of second blades are all disposed on the second end face; the plurality of reinforcing ribs includes a plurality of first reinforcing ribs and a plurality of second reinforcing ribs, the plurality of first reinforcing ribs are all disposed on the first end face, and the plurality of second reinforcing ribs are all disposed on the second end face.

[0014] Secondly, the present invention provides a fan, the fan including a volute, a motor and an impeller as described in any of the above embodiments, the impeller being rotatably disposed within the volute, and the motor being drivenly connected to the central plate of the impeller.

[0015] Thirdly, the present invention provides a range hood, which includes a main unit, a smoke collection hood, and a fan as described in the above solution. The main unit is fixedly connected to the smoke collection hood, and the fan is disposed inside the main unit.

[0016] The impeller provided by this invention has at least the following beneficial effects: The impeller includes a central disc, blades, and reinforcing ribs. Both the blades and reinforcing ribs are located on the central disc, with the reinforcing ribs positioned closer to the center of the central disc than the blades. The reinforcing ribs include interconnected vertical ribs and deflecting ribs, with the deflecting ribs offset from the vertical ribs in a direction opposite to the impeller's rotation direction. This embodiment enhances the structural strength of the central disc through the reinforcing ribs, thereby reducing the required thickness of the central disc. By offsetting the deflecting ribs relative to the vertical ribs in a direction opposite to the impeller's rotation direction, the rotational force of the blades aligns with the force direction of the deflecting ribs, ensuring the reliability of the deflecting ribs themselves. This further enhances the structural strength of the central disc, thus reducing the required thickness of the central disc while maintaining sufficient structural strength to meet usage requirements. This reduces the material usage and lowers costs. Simultaneously, it reduces the weight of the central disc, improving the efficiency of the motor-driven impeller in absorbing and exhausting oil fumes.

[0017] The fan provided by this invention has at least the following beneficial effects: The fan includes the aforementioned impeller, which, while maintaining its own strength, is lightweight, thereby reducing costs and improving the fan's efficiency in drawing and expelling oil fumes.

[0018] The range hood provided by this invention has at least the following beneficial effects: The range hood includes the aforementioned fan, which is low in cost and highly efficient at extracting and exhausting cooking fumes. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the first structure of the impeller in an embodiment of the present invention; Figure 2 This is a schematic diagram of the second structure of the impeller in an embodiment of the present invention; Figure 3 This is a schematic diagram of the third structure of the impeller in an embodiment of the present invention; Figure 4 This is an exploded view of the impeller in an embodiment of the present invention; Figure 5 This is a top view of the impeller in an embodiment of the present invention; Figure 6 for Figure 2 Enlarged view at point A in the middle; Figure 7 for Figure 2 Enlarged view at point B; Figure 8 This is a schematic diagram of the first partial structure of the impeller in an embodiment of the present invention; Figure 9 This is a schematic diagram of the second partial structure of the impeller in an embodiment of the present invention; Figure 10 for Figure 4 A magnified view of point C in the middle.

[0020] In the picture: 1. Mid-plate; 11. First end face; 12. Second end face; 2. Reinforcing rib; 2a. First reinforcing rib; 2b. Second reinforcing rib; 21. Deflecting rib; 211. Root; 212. Top; 213. Inner end; 214. Outer end; 215. First connecting end; 216. First misaligned end; 22. Vertical rib; 221. Second connecting end; 222. Second misaligned end; 3. Leaf blade; 3a. First leaf blade; 3b. Second leaf blade; 4. First end ring; 5. Second end ring; 6. Sleeve. Detailed Implementation

[0021] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Moreover, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0023] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0024] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0025] This embodiment provides a range hood that can be used in the kitchen and installed above the stove to extract cooking fumes to the outside.

[0026] The range hood can be a top-mounted range hood, a side-mounted range hood, etc.

[0027] Specifically, the range hood includes a main unit, a smoke collection hood, and a fan. The main unit and the smoke collection hood are fixedly connected, and the fan is located inside the main unit. The smoke collection hood is equipped with a smoke inlet. When the fan is working, it generates negative pressure, causing the cooking fumes to enter the smoke collection hood through the smoke inlet, then enter the main unit, and are exhausted outdoors by the fan.

[0028] In other embodiments, the fan can also be applied to other kitchen appliances, such as steam ovens, integrated cooktops, etc.

[0029] Please refer to Figures 1 to 5 The impeller includes a central disk 1 and blades 3, with the blades 3 disposed on the central disk 1. The central disk 1 is used for transmission connection with the motor. When the motor rotates, it can drive the central disk 1 and the blades 3 on the central disk 1 to rotate synchronously, so that the fan can suck up the oil fumes.

[0030] In related technologies, the force provided by the motor is transmitted to the blades through the central disk. Therefore, the central disk needs to have high structural strength to ensure that it can reliably transmit the force provided by the motor to the blades. The central disk is usually designed to be relatively thick to ensure its structural strength. However, this design results in a larger weight of the central disk, which reduces the efficiency of the motor driving the impeller to suck up and exhaust oil fumes. In addition, it also results in a larger amount of material used for the central disk, which leads to a higher processing cost for the impeller.

[0031] For this, please refer to Figures 2 to 10In this embodiment, the impeller also includes reinforcing ribs 2, which are disposed on the central disc 1 and are located near the center of the central disc 1 relative to the blades 3. The reinforcing ribs 2 include interconnected vertical ribs 22 and deflecting ribs 21, with the deflecting ribs 21 offset from the vertical ribs 22 in a direction opposite to the rotation direction of the impeller. In this embodiment, on the one hand, the reinforcing ribs 2 enhance the structural strength of the central disc 1, thereby reducing the required thickness of the central disc 1; on the other hand, the offset direction of the deflecting ribs 21 relative to the vertical ribs 22 is opposite to the rotation direction of the impeller, ensuring that the rotation of the blades 3 is consistent with the force direction of the deflecting ribs 21, guaranteeing the reliability of the deflecting ribs 21, and further enhancing the structural strength of the central disc 1. Therefore, in this embodiment, through the above two aspects, while ensuring that the structural strength of the central disc 1 meets the usage requirements, the required thickness of the central disc 1 can be effectively reduced, thereby reducing the material used in the central disc 1 and lowering costs; at the same time, the weight of the central disc 1 can also be reduced, thereby improving the efficiency of the motor-driven impeller in absorbing and exhausting oil fumes.

[0032] In addition, in this embodiment, by setting the deflection rib 21 to be staggered relative to the vertical rib 22, it is convenient to form the deflection rib 21 and the vertical rib 22 separately through different mold cores, so that the relative movement between the two mold cores is less likely to interfere, making demolding easier, and the sealing of the injection cavity can also be guaranteed during the molding process.

[0033] In some embodiments, please refer to Figures 2 to 5 The impeller includes multiple reinforcing ribs 2, which are evenly distributed along the circumference of the central disk 1. In this embodiment, by setting multiple reinforcing ribs 2, the structural strength of the central disk 1 can be further improved, and when the motor drives the central disk 1 and drives the blades 3 to rotate, the reinforcing effect of the multiple reinforcing ribs 2 on the structure of the central disk 1 is more balanced in the circumferential direction of the central disk 1. The even distribution of multiple reinforcing ribs 2 along the circumferential direction of the central disk 1 can be understood as the equal angular interval between any two adjacent reinforcing ribs 2 along the circumferential direction of the central disk 1. For example, when three reinforcing ribs 2 are simultaneously provided at one end of the central disk 1, the angular interval between any two adjacent reinforcing ribs 2 along the circumferential direction of the central disk 1 is 120°; when six reinforcing ribs 2 are simultaneously provided at one end of the central disk 1, the angular interval between any two adjacent reinforcing ribs 2 along the circumferential direction of the central disk 1 is 60°. In this embodiment, the specific number of reinforcing ribs 2 is not limited.

[0034] In some embodiments, please refer to Figures 2 to 5The impeller includes multiple blades 3, which are evenly distributed along the circumference of the central disk 1. This arrangement ensures that when the impeller rotates, all blades 3 rotate together, improving the impeller's smoke extraction efficiency. The even distribution of the multiple blades 3 along the circumference of the central disk 1 can be understood as the equal angular interval between any two adjacent blades 3 along the circumference of the central disk 1. For example, when 48 blades 3 are simultaneously arranged at one end of the central disk 1, the angular interval between any two adjacent blades 3 along the circumference of the central disk 1 is 7.5°; when 40 reinforcing ribs 2 are simultaneously arranged at one end of the central disk 1, the angular interval between any two adjacent reinforcing ribs 2 along the circumference of the central disk 1 is 9°. In this embodiment, the specific number of blades 3 is not limited.

[0035] In some embodiments, please refer to Figures 2 to 4 The middle plate 1 includes a first end face 11 and a second end face 12 arranged opposite to each other along its own axis. The multiple blades 3 include multiple first blades 3a and multiple second blades 3b. The multiple first blades 3a are all disposed on the first end face 11, and the multiple second blades 3b are all disposed on the second end face 12. The multiple reinforcing ribs 2 include multiple first reinforcing ribs 2a and multiple second reinforcing ribs 2b. The multiple first reinforcing ribs 2a are disposed on the first end face 11, and the multiple second reinforcing ribs 2b are disposed on the second end face 12. In this embodiment, on the one hand, the first blade 3a and the second blade 3b at both ends of the central disk 1 can jointly bear the centrifugal force and airflow impact force during rotation. Compared with setting the blade 3 on one side of the central disk 1, it can avoid the situation of concentrated force, effectively disperse the stress load of the central disk 1, reduce the risk of impeller deformation, and thus extend the service life of the impeller. In addition, the blades 3 set at both ends of the central disk 1 can form a double-sided air intake structure. Compared with setting the blade 3 on one side of the central disk 1, the air intake area of ​​the fan is directly doubled, which can enable the fan to absorb more oil fumes at the same speed and improve the smoke exhaust efficiency. On the other hand, by setting the first reinforcing rib 2a and the second reinforcing rib 2b at both ends of the central disk 1, the structural strength of the central disk 1 can be improved from both sides of the central disk 1 axial direction, so that the power provided by the fan can be reliably transmitted to the first blade 3a and the second blade 3b, and further reduce the material used in the central disk 1 to further reduce costs. At the same time, it can also further reduce the weight of the central disk 1 and further improve the efficiency of the fan driving the impeller to suck up and exhaust oil fumes.

[0036] In other embodiments, the blade 3 may also be provided only on one side of the axial direction of the central disk 1, depending on actual needs. The reinforcing rib 2 may also be provided only on one side of the axial direction of the central disk 1, depending on actual needs.

[0037] In some embodiments, please refer to Figures 1 to 4The impeller also includes a first end ring 4 and a second end ring 5, which are respectively disposed on both sides of the central disk 1. Both the first end ring 4 and the second end ring 5 are spaced apart from the central disk 1 and are coaxially arranged with the central disk 1. The first end ring 4 is connected to the ends of multiple first blades 3a away from the central disk 1, and the second end ring 5 is connected to the ends of multiple second blades 3b away from the central disk 1. In this embodiment, by setting the first end ring 4, each first blade 3a is supported at both ends along the axial direction of the central disk 1 by the central disk 1 and the first end ring 4, and all the first blades 3a form a whole, enhancing the overall structural strength and improving the stability of each first blade 3a during rotation. Similarly, by setting the second end ring 5, each second blade 3b is supported at both ends along the axial direction of the central disk 1 by the central disk 1 and the second end ring 5, and all the second blades 3b form a whole, enhancing the overall structural strength and improving the stability of each second blade 3b during rotation.

[0038] In some embodiments, please refer to Figures 1 to 4 The number of first blades 3a and second blades 3b are equal and they are arranged in a one-to-one correspondence. For each first blade 3a and its corresponding second blade 3b, the end of the first blade 3a away from the central disk 1 is deflected in the opposite direction to the rotation direction of the impeller compared to the end of the first blade 3a connected to the central disk 1; similarly, the end of the second blade 3b away from the central disk 1 is deflected in the opposite direction to the rotation direction of the impeller compared to the end of the second blade 3b connected to the central disk 1. Furthermore, the ends of the first blade 3a and the second blade 3b connected to the central disk 1 are aligned along the circumference of the central disk 1. This arrangement makes the first blades 3a and their corresponding second blades 3b form a herringbone shape. When the motor drives the central disk 1 and the first blades 3a and 3b to rotate, the airflow driven by the first blades 3a and 3b will not act on the volute tongue simultaneously, thereby reducing the noise of the fan during operation.

[0039] As one alternative, the number of first blades 3a and second blades 3b are equal and they are arranged in a one-to-one correspondence. For each first blade 3a and its corresponding second blade 3b, the end of the first blade 3a away from the central disk 1 is deflected in the opposite direction to the rotation direction of the impeller compared to the end of the first blade 3a connected to the central disk 1. The second blade 3b is perpendicularly connected to the central disk 1, and the ends of the first blade 3a and the second blade 3b connected to the central disk 1 are aligned along the circumferential direction of the central disk 1.

[0040] In some embodiments, please refer to Figures 2 to 4The impeller also includes a sleeve 6, which is coaxially arranged with the central disk 1 and fixedly connected to the central disk 1. Multiple reinforcing ribs 2 are evenly distributed along the circumference of the sleeve 6 and are all connected to the sleeve 6. The sleeve 6 is used for transmission connection with the motor. The force provided by the motor is reliably transmitted to the outer edge of the central disk 1 through the sleeve 6 and each reinforcing rib 2, and then to each blade 3, so that the blade 3 can rotate reliably.

[0041] In some embodiments, please refer to Figure 2 and Figure 3 The vertical ribs 22 of the multiple first reinforcing ribs 2a radiate outwards from the first end face 11 of the middle plate 1, and the vertical ribs 22 of the multiple second reinforcing ribs 2b radiate outwards from the second end face 12 of the middle plate 1. With this arrangement, when the force provided by the motor acts on the middle plate 1, it is transmitted radially towards the edge of the middle plate 1. This distribution is consistent with the vertical ribs 22 distribution on the two end faces of the middle plate 1, effectively strengthening the structural strength of the middle plate 1.

[0042] In some embodiments, please refer to Figure 6 and Figure 7 Along the axial direction of the central plate 1, the deflection rib 21 has a root 211 connected to the central plate 1 and a top 212 away from the central plate 1, and the top 212 is deflected relative to the root 211 in a direction opposite to the rotation direction of the impeller. With this configuration, in the axial direction of the central plate 1, the deflection rib 21 is deflected at a certain angle relative to the vertical rib 22 in the opposite direction of the impeller's rotation, so that the direction of misalignment between the deflection rib 21 and the vertical rib 22 is opposite to the rotation direction of the impeller. When the impeller rotates, the force provided by the motor is transmitted to the deflection rib 21, tending to straighten the deflection rib 21. That is, the external force tends to eliminate the misalignment between the deflection rib 21 and the vertical rib 22, thereby improving the load-bearing capacity of the deflection rib 21, enabling it to withstand greater forces, and ensuring the reliability of the deflection rib 21 itself.

[0043] Specifically, since the vertical rib 22 is set perpendicular to the center plate 1, the direction of the misalignment of the deflection rib 21 relative to the vertical rib 22 is consistent with the direction of inclination of the deflection rib 21 relative to the axis of the center plate 1. Please refer to... Figure 10In this embodiment, the angle between the deflection rib 21 of the first reinforcing rib 2a and the axis of the central plate 1 is α, 0° < α ≤ 25°, and the angle between the deflection rib 21 of the second reinforcing rib 2b and the axis of the central plate 1 is β, 0° < β ≤ 25°. This arrangement facilitates the demolding of each deflection rib 21 of the first reinforcing rib 2a by passing through a mold core that moves away from the central plate 1 along its axial direction while simultaneously rotating along the circumference of the central plate 1, thus enabling the multiple deflection ribs 21 of the first reinforcing rib 2a to be integrally formed. Simultaneously, it facilitates the demolding of each deflection rib 21 of the second reinforcing rib 2b by passing through another mold core that moves away from the central plate 1 along its axial direction while simultaneously rotating along the circumference of the central plate 1, thus enabling the multiple deflection ribs 21 of the second reinforcing rib 2b to be integrally formed.

[0044] In some embodiments, the tilting direction of the deflection rib 21 of the first reinforcing rib 2a relative to the axis of the middle disk 1 is the same as the tilting direction of the first blade 3a relative to the axis of the middle disk 1. That is, the included angle between the first blade 3a and the axis of the middle disk 1 is also α. This arrangement facilitates the integral molding of each first blade 3a and each first reinforcing rib 2a through the same mold core.

[0045] In some embodiments, 0° < α ≤ 25°. Specifically, the value of α can be 1°, 2°, 3°, 4°, 5°, 6°, 7°, 8°, 9°, 10°, 11°, 12°, 13°, 14°, 15°, 16°, 17°, 18°, 19°, 20°, 21°, 22°, 23°, 24°, or 25°, etc.

[0046] In some embodiments, the tilting direction of the deflection rib 21 of the second reinforcing rib 2b relative to the axis of the central plate 1 is the same as the tilting direction of the second blade 3b relative to the axis of the central plate 1. That is, the included angle between the second blade 3b and the axis of the central plate 1 is also β. This arrangement facilitates the integral molding of each second blade 3b and each second reinforcing rib 2b through the same mold core.

[0047] In some embodiments, 0° < β ≤ 25°. Specifically, the value of β can be 1°, 2°, 3°, 4°, 5°, 6°, 7°, 8°, 9°, 10°, 11°, 12°, 13°, 14°, 15°, 16°, 17°, 18°, 19°, 20°, 21°, 22°, 23°, 24°, or 25°, etc.

[0048] In other embodiments, the deflection rib 21 of the second reinforcing rib 2b and each of the second blades 2b can also be arranged perpendicularly to the central plate 1. That is, in this case, the angle between the second blade 3b and the axis of the central plate 1 and the angle between the deflection rib 21 of the second reinforcing rib 2b and the axis of the central plate 1 are both 0°.

[0049] As one alternative, please refer to Figure 6 and Figure 8 The deflection rib 21 has an inner end 213 near the center of the central plate 1 and an outer end 214 away from the center of the central plate 1. The outer end 214 is deflected relative to the inner end 213 in a direction opposite to the rotation direction of the impeller. With this arrangement, in the radial direction of the central plate 1, the deflection rib 21 is deflected at a certain angle relative to the vertical rib 22 in the opposite direction of the impeller rotation, so that the direction of the misalignment of the deflection rib 21 relative to the vertical rib 22 is opposite to the rotation direction of the impeller. Compared with extending the deflection rib 21 radially along the central plate 1, this increases the arrangement length of the deflection rib 21, thereby improving the structural strength of the central plate 1. In addition, when the deflection rib 21 is subjected to the force given by the motor, the external force tends to cause the deflection rib 21 to deflect in a direction flush with the vertical rib 22, that is, the external force tends to eliminate the misalignment between the deflection rib 21 and the vertical rib 22. This also improves the force-bearing capacity of the deflection rib 21 in the rotation direction of the impeller and ensures the reliability of the deflection rib 21 itself.

[0050] As one alternative, the deflection rib 21 has a root 211 connected to the central disk 1 and a top 212 away from the central disk 1. The deflection rib 21 also has an inner end 213 near the center of the central disk 1 and an outer end 214 away from the center of the central disk 1. The top 212 is deflected relative to the root 211 in a direction opposite to the rotation direction of the impeller, and the outer end 214 is deflected relative to the inner end 213 in a direction opposite to the rotation direction of the impeller. With this configuration, the deflection rib 21 is deflected relative to the vertical rib 22 at a certain angle in both the axial and radial directions of the central disk 1 in a direction opposite to the rotation direction of the impeller. This can further improve the force-bearing capacity of the deflection rib 21 in the rotation direction of the impeller and ensure the reliability of the deflection rib 21 itself.

[0051] As one alternative, please refer to Figure 6 and Figure 9 The deflection rib 21 and the vertical rib 22 are arranged in parallel, and the deflection rib 21 is offset by a certain distance relative to the vertical rib 22 in the opposite direction of the impeller's rotation direction.

[0052] In some embodiments, please refer to Figure 7The vertical rib 22 includes a first connecting end 215 and a first misaligned end 216 connected to the first connecting end 215. Along the rotation direction of the impeller, the first connecting end 215 is located upstream of the first misaligned end 216. The first connecting end 215 is connected to the deflection rib 21, and the first misaligned end 216 is exposed. The area of ​​the first connecting end 215 is not less than the area of ​​the first misaligned end 216. In this embodiment, by ensuring that the area of ​​the first connecting end 215 is not less than the area of ​​the first misaligned end 216, the connection strength between the vertical rib 22 and the deflection rib 21 can be guaranteed, thereby ensuring that the force provided by the motor can be reliably transmitted from the vertical rib 22 to the deflection rib 21. Furthermore, the vertical rib 22 and the deflection rib 21 are partially connected and partially exposed, facilitating the molding of the deflection rib 21 and the vertical rib 22 using different mold cores, and facilitating the smooth demolding of the deflection rib 21 and the vertical rib 22.

[0053] In some embodiments, please refer to Figure 7 The deflection rib 21 includes a second connecting end 221 and a second misaligned end 222 connected to the second connecting end 221. Along the rotation direction of the impeller, the second connecting end 221 is located downstream of the second misaligned end 222. The second connecting end 221 is connected to the vertical rib 22, and the second misaligned end 222 is exposed. The area of ​​the second connecting end 221 is not less than the area of ​​the second misaligned end 222. In this embodiment, by ensuring that the area of ​​the second connecting end 221 is not less than the area of ​​the second misaligned end 222, the connection strength between the vertical rib 22 and the deflection rib 21 can be guaranteed, thereby ensuring that the force provided by the motor can be reliably transmitted from the vertical rib 22 to the deflection rib 21. Furthermore, the deflection rib 21 and the vertical rib 22 are also partially connected and partially exposed, which facilitates the molding of the deflection rib 21 and the vertical rib 22 using different mold cores and facilitates the smooth demolding of the deflection rib 21 and the vertical rib 22.

[0054] In some embodiments, please refer to Figure 8 The height of the reinforcing rib 2 gradually decreases from the center of the middle plate 1 towards the direction away from the center of the middle plate 1. In this embodiment, when the force of the motor is radiated from the sleeve 6 to the outer edge of the middle plate 1, the force will also be dispersed due to radiation as it gets closer to the outer edge. The structural strength requirement of the middle plate 1 will also gradually weaken, so that the height of the reinforcing rib 2 gradually decreases from the center of the middle plate 1 towards the direction away from the center of the middle plate 1. This can match the change of force, reduce the material used for the reinforcing rib 2, save costs, further reduce the weight of the impeller, and further improve the efficiency of the fan in extracting oil fumes.

[0055] The above description is merely a preferred embodiment of the present invention and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of disclosure in this invention is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-disclosed concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this invention.

Claims

1. An impeller, characterized in that, include: Mid-game (1); Blade (3), the blade (3) is disposed on the middle plate (1); A reinforcing rib (2) is provided on the middle disk (1), and the reinforcing rib (2) is close to the center of the middle disk (1) relative to the blade (3). The reinforcing rib (2) includes a vertical rib (22) and a deflection rib (21) connected to each other. The deflection rib (21) is offset relative to the vertical rib (22), and the direction of the offset of the deflection rib (21) relative to the vertical rib (22) is opposite to the rotation direction of the impeller.

2. The impeller according to claim 1, characterized in that, Along the axial direction of the middle disk (1), the deflection rib (21) has a root (211) connected to the middle disk (1) and a top (212) away from the middle disk (1), and the top (212) is deflected relative to the root (211) in a direction opposite to the rotation direction of the impeller.

3. The impeller according to claim 1, characterized in that, The deflection rib (21) has an inner end (213) near the center of the middle disk (1) and an outer end (214) away from the center of the middle disk (1), the outer end (214) being deflected relative to the inner end (213) in a direction opposite to the rotation direction of the impeller.

4. The impeller according to claim 3, characterized in that, The vertical rib (22) includes a first connecting end (215) and a first misaligned end (216) connected to the first connecting end (215), and along the rotation direction of the impeller, the first connecting end (215) is located upstream of the first misaligned end (216); The first connecting end (215) is connected to the deflection rib (21), the first misaligned end (216) is exposed, and the area of ​​the first connecting end (215) is not less than the area of ​​the first misaligned end (216).

5. The impeller according to claim 3, characterized in that, The deflection rib (21) includes a second connecting end (221) and a second misaligned end (222) connected to the second connecting end (221), and along the rotation direction of the impeller, the second connecting end (221) is located downstream of the second misaligned end (222); The second connecting end (221) is connected to the vertical rib (22), the second misaligned end (222) is exposed, and the area of ​​the second connecting end (221) is not less than the area of ​​the second misaligned end (222).

6. The impeller according to claim 3, characterized in that, The height of the reinforcing rib (2) gradually decreases from the center of the middle plate (1) toward the direction away from the center of the middle plate (1).

7. The impeller according to any one of claims 1-5, characterized in that, The impeller includes a plurality of reinforcing ribs (2) which are evenly distributed along the circumference of the central disk (1); and / or, the impeller includes a plurality of blades (3) which are evenly distributed along the circumference of the central disk (1).

8. The impeller according to claim 7, characterized in that, The middle plate (1) includes a first end face (11) and a second end face (12) arranged opposite to each other along its own axis. The multiple blades (3) include multiple first blades (3a) and multiple second blades (3b). The multiple first blades (3a) are all disposed on the first end face (11), and the multiple second blades (3b) are all disposed on the second end face (12). The multiple reinforcing ribs (2) include multiple first reinforcing ribs (2a) and multiple second reinforcing ribs (2b). The multiple first reinforcing ribs (2a) are all disposed on the first end face (11), and the multiple second reinforcing ribs (2b) are all disposed on the second end face (12).

9. A fan, characterized in that, The fan includes a volute, a motor, and an impeller as described in any one of claims 1-8, wherein the impeller is rotatably disposed within the volute, and the motor is connected to the central disk (1) via a transmission.

10. A range hood, characterized in that, The range hood includes a main unit housing, a smoke collection hood, and a fan as described in claim 9. The main unit housing is fixedly connected to the smoke collection hood, and the fan is disposed inside the main unit housing.

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