Impeller, fan and air supply device

Abstract

The embodiment of the invention provides an impeller, a fan and an air supply device. The impeller comprises a plurality of blades arranged in the circumferential direction. An annular part connecting the upper parts of the plurality of blades; and a lower plate connecting lower portions of the plurality of blades and expanding in a radial direction, in which an upper end portion of the annular portion is positioned closer to an upper side in the axial direction than the upper end portions of the blades in the axial direction, and in which a lower end of the annular portion overlaps at least a portion of the upper end portions of the blades when connected to the blades as viewed in the radial direction. According to the embodiment of the invention, under the condition that the axial size of the impeller is restrained, backflow can be effectively prevented, and the cooling performance is improved.

Description

Technical Field

[0001] This application relates to the field of electromechanical technology, and in particular to an impeller, a fan, and an air supply device. Background Technology

[0002] Impellers are widely used in various fans. An impeller typically includes a base plate, a cup-shaped part, and multiple blades. The cup-shaped part is located in the center of the base plate and protrudes upward toward the axial direction. The lower ends of the multiple blades are located on the base plate. Each blade is located on the radially outer side of the cup-shaped part and extends radially. A space for accommodating motor components is formed inside the cup-shaped part.

[0003] Typically, the impeller also includes an annular component, which connects the upper part of multiple blades to form a ring shape, and an air inlet or intake port is formed in the center of the annular component for drawing in air.

[0004] In some existing structures, the annular component is set on the upper part of the blade through a connecting component. This structure results in a large overall axial dimension of the impeller, which is difficult to meet customer requirements.

[0005] In some other existing structures, annular components surround multiple blades radially outside the blades to suppress the overall axial dimension of the impeller. However, in such structures, the upper end face of the annular component is often flush with or close to the upper end face of the blades. When the impeller is working, the airflow outside the impeller will flow into the inner side of the impeller through the upper end face of the annular component, forming a counterflow opposite to the direction of air intake or suction, which affects the cooling performance of the impeller.

[0006] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solutions of this application and facilitating understanding by those skilled in the art. It should not be assumed that these technical solutions are known to those skilled in the art simply because they have been described in the background section of this application. Summary of the Invention

[0007] To address at least one of the aforementioned problems or other similar issues, embodiments of this application provide an impeller, a fan, and an air supply device that effectively prevent backflow and improve cooling performance while suppressing the axial dimension of the impeller.

[0008] According to an embodiment of the first aspect of this application, an impeller is provided, which is rotatable along a rotating shaft extending in a vertical direction. The impeller has an air inlet at its upper part, and the impeller includes:

[0009] Multiple blades arranged circumferentially;

[0010] An annular portion connecting the upper parts of the plurality of blades; and

[0011] A lower plate that connects the lower portions of the multiple blades and extends radially.

[0012] In the axial direction, the upper end of the annular portion is located closer to the axially upward side than the upper part of the blade.

[0013] Viewed radially, the lower end of the annular portion coincides with at least a portion of the upper part of the blade at the point where it connects to the blade.

[0014] In at least one embodiment, the inner circumference of the annular portion is provided with a plurality of recesses, the axial dimension of the recesses being smaller than the axial dimension of the annular portion.

[0015] In at least one embodiment, the axial dimension of the recess is 30%–90% of the axial dimension of the annular portion.

[0016] In at least one embodiment, the radial dimension of the recess is 30%–80% of the radial dimension of the annular portion.

[0017] In at least one embodiment, the number of recesses is twice the number of blades.

[0018] In at least one embodiment, the axial height of the annular portion is less than the axial height of the blade.

[0019] In at least one embodiment, the axial height of the annular portion is 20%–90% of the axial height of the blade.

[0020] In at least one embodiment, the distance from the upper part of the blade to the upper end of the annular portion is 10%–60% of the axial dimension of the annular portion.

[0021] In at least one embodiment, the outer diameter of the annular portion is not less than the outer diameter of the blade.

[0022] In at least one embodiment, the inner diameter of the annular portion is 70%–108% of the outer diameter of the blade.

[0023] In at least one embodiment, the upper part of the blade is provided with an R-angle.

[0024] In at least one embodiment, the R-angle is disposed on the side of the blade near the negative pressure region, and the protrusion direction of the R-angle is opposite to the rotation direction of the impeller.

[0025] According to an embodiment of a second aspect of this application, a fan is provided, the fan comprising:

[0026] The impeller as described in the embodiments of the first aspect of this application; and

[0027] The base, which connects to the lower plate of the impeller.

[0028] According to an embodiment of a second aspect of this application, an air supply device is provided, the air supply device comprising:

[0029] The fan as described in the embodiments of the first aspect of this application; and

[0030] The cover is connected to the fan from above, and the air intake of the cover is curved.

[0031] One beneficial effect of the embodiments of this application is that, in the axial direction, the upper end of the annular portion is located closer to the axial upper side than the upper part of the blade, and when viewed radially, the lower end of the annular portion coincides with at least a portion of the upper part of the blade at the connection point. Thus, while suppressing the axial dimension of the impeller, backflow can be effectively prevented and cooling performance can be improved.

[0032] Specific embodiments of this application are disclosed in detail with reference to the following description and accompanying drawings, indicating how the principles of this application can be adopted. It should be understood that the embodiments of this application are not limited in scope. Within the spirit and scope of the appended claims, embodiments of this application include many changes, modifications, and equivalents.

[0033] Features described and / or illustrated for one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments. Attached Figure Description

[0034] The elements and features described in one drawing or embodiment of this application may be combined with elements and features shown in one or more other drawings or embodiments. Furthermore, in the drawings, similar reference numerals denote corresponding parts in several drawings and can be used to indicate corresponding parts used in more than one embodiment.

[0035] The accompanying drawings, which form part of the specification, are used to provide a further understanding of the embodiments of this application and illustrate the implementation methods of this application, together with the textual description, to explain the principles of this application. Obviously, the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:

[0036] Figure 1 This is a schematic diagram of an impeller according to an embodiment of this application;

[0037] Figure 2 This is a three-dimensional schematic diagram of an impeller according to an embodiment of this application;

[0038] Figure 3This is yet another schematic diagram of the impeller according to an embodiment of this application;

[0039] Figure 4 It is along Figure 3 The view seen when BB is cut open in the direction shown;

[0040] Figure 5 This is a schematic diagram of a fan according to an embodiment of this application;

[0041] Figure 6 This is a schematic diagram of an air supply device according to an embodiment of this application;

[0042] Figure 7 This is another schematic diagram of the air supply device according to an embodiment of this application;

[0043] Figure 8 This is another schematic diagram of the air supply device according to an embodiment of this application;

[0044] Figure 9 This is another schematic diagram of the air supply device according to an embodiment of this application. Detailed Implementation

[0045] Referring to the accompanying drawings, the foregoing and other features of the embodiments of this application will become apparent from the following description. Specific implementations of the embodiments of this application are specifically disclosed in the following description and drawings, illustrating some implementations in which the principles of the embodiments of this application can be adopted. It should be understood that the embodiments of this application are not limited to the described implementations; rather, the embodiments of this application include all modifications, variations, and equivalents falling within the scope of the appended claims.

[0046] In embodiments of this application, the term "and / or" includes any one and all combinations of one or more of the terms listed in association. The terms "comprising," "including," "having," etc., refer to the presence of the stated features, elements, components, or assemblies, but do not exclude the presence or addition of one or more other features, elements, components, or assemblies.

[0047] In the embodiments of this application, the singular forms "a," "the," etc., may include the plural forms and should be broadly interpreted as "a kind" or "a class" rather than limited to the meaning of "an." Furthermore, the term "the" should be understood to include both the singular and plural forms unless the context explicitly indicates otherwise. Additionally, the term "according to" should be understood as "at least partially based on…," and the term "based on" should be understood as "at least partially based on…," unless the context explicitly indicates otherwise.

[0048] In the embodiments of this application, for ease of explanation, the central axis OO' of the impeller or the direction parallel to it is referred to as "axial direction", the radial direction centered on the axis is referred to as "radial direction", and the direction around the axis is referred to as "circumferential direction". However, this is only for the convenience of explanation and does not limit the orientation of the impeller, fan, and air supply device during use and manufacturing.

[0049] Various embodiments of the present application will now be described with reference to the accompanying drawings. These embodiments are merely exemplary and are not intended to limit the scope of the present application.

[0050] This application provides an impeller. Figure 1 This is a schematic diagram of an impeller according to an embodiment of this application, showing the case where the impeller is cut along its shaft. Figure 2 This is a perspective view of the impeller according to an embodiment of this application, showing the impeller viewed from above and below. In this embodiment, the impeller 1 is capable of rotating along a rotation axis X extending in the vertical direction, and the impeller 1 has an air inlet at its upper part.

[0051] like Figure 1 and Figure 2 As shown, the impeller 1 includes multiple blades 2, an annular portion 3, and a lower plate 4. The multiple blades 2 are arranged circumferentially. The annular portion 3 connects to the upper part 2a of the multiple blades 2 (the upper part 2a can also be called the upper end 2a). The lower plate 4 connects to the lower part 2b of the multiple blades 2 and extends radially.

[0052] like Figure 1 As shown, in the axial direction OO', the upper end 3a of the annular portion 3 is located closer to the axial upper side (O side) than the upper end 2a of the blade 2. When viewed radially, the lower end 3b of the annular portion 3 coincides with at least a portion of the upper end 2a of the blade 2 at the connection point.

[0053] Therefore, the upper end 3a of the annular portion 3 is located axially closer to the upper side than the upper end 2a of the blade 2. When viewed radially, the lower end 3b of the annular portion 3 coincides with at least a portion of the upper end 2a of the blade 2 at the connection point. Thus, while suppressing the axial dimension of the impeller 1, backflow can be effectively prevented and cooling performance can be improved.

[0054] For example, in this embodiment, the upper end portion 3a of the annular portion 3 is located axially closer to the upper side than the upper end portion 2a of the blade 2. That is, the upper end portion 3a of the annular portion 3 protrudes beyond the upper end portion 2a of the blade 2. The outer side of the impeller and the inner side of the impeller are separated by the upper end portion 3a of the annular portion 3. Compared with the existing structure in which the upper end face of the annular component is often flush with or close to the upper end face of the blade, the impeller structure according to this embodiment prevents the airflow on the outer side of the impeller from flowing into the inner side of the impeller and forming a backflow when the impeller is working. For example, the annular portion 3 can further form a labyrinth structure with the cover, which can effectively prevent backflow and improve cooling performance.

[0055] Furthermore, in this embodiment, when viewed radially, the lower end 3b of the annular portion 3 coincides with at least a portion of the upper end 2a of the blade 2 at the connecting blade 2. That is, the annular portion 3 and the blade 2 have an overlapping portion in the axial direction. Compared with the existing structure in which the annular component is set at the upper end of the blade by the connecting component, the annular portion 3 of this embodiment is embedded in the blade 2, which can effectively reduce the axial dimension of the impeller.

[0056] In this embodiment, the interlocking structure between the lower end 3b of the annular portion 3 and the upper end 2a of the blade 2 is not specifically limited; for example, Figure 1 The diagram shows a structure in which the upper end 2a of the blade 2 has a notch formed at a radially outward position, and the lower end 3b of the annular portion 3 is mounted on the notch. However, this application is not limited to this. For example, the lower end 3b of the annular portion 3 may also have a notch, and the upper end 2a of the blade 2 may be mounted on the notch formed by the lower end 3b. Alternatively, the lower end 3b of the annular portion 3 and the upper end 2a of the blade 2 may have a concave-convex fit structure. For example, the lower end 3b of the annular portion 3 may have a protrusion, and the upper end 2a of the blade 2 may have a recess, or the lower end 3b of the annular portion 3 may have a recess, and the upper end 2a of the blade 2 may have a protrusion. This application does not limit this.

[0057] like Figure 1 and Figure 2 As shown, in one or more embodiments, the inner circumference of the annular portion 3 is provided with a plurality of recesses 31, the axial dimension of the recesses 31 being smaller than the axial dimension of the annular portion 3.

[0058] Therefore, when a component for dynamic balance correction is provided in the recess 31 on the inner circumference of the annular portion 3, such as dynamic balance correction paste, it is possible to further prevent the dynamic balance correction paste from falling off due to the centrifugal force of rotation while ensuring dynamic balance.

[0059] In this application embodiment, there is no limitation on the number and arrangement of the recesses 31. For example, there may be multiple recesses 31. For example, the number of recesses 31 may be twice the number of blades 2, but this application is not limited to this. The number of recesses 31 may also be other values. In addition, multiple recesses 31 may be arranged at equal or unequal intervals in the circumferential direction of the annular portion 3. This application does not limit this and can determine it according to actual needs.

[0060] In the embodiments of this application, the axial dimension of the recess 31 is smaller than the axial dimension of the annular portion 3. For example, the axial dimension of the recess is 30% to 90% of the axial dimension of the annular portion. However, this application is not limited to this. The axial dimension of the recess can also be other values, as long as the axial dimension of the recess 31 is smaller than the axial dimension of the annular portion 3.

[0061] In one or more embodiments, the radial dimension of the recess 31 is 30%–80% of the radial dimension of the annular portion 3. That is, the depth of the recess 31 from the inner circumferential surface of the annular portion toward the radially outward side is 30%–80% of the radial dimension of the annular portion 3. However, this application is not limited to this, and the radial dimension of the recess can also be other values, as long as the radial dimension of the recess 31 is less than the radial dimension of the annular portion 3.

[0062] In one or more embodiments, the axial height of the annular portion 3 is less than the axial height of the blade 2, thereby further suppressing the axial dimension of the impeller. For example, the axial height of the annular portion 3 is 20% to 90% of the axial height of the blade 2. However, this application is not limited to this. The axial height of the annular portion can also be greater than or equal to the axial height of the blade, and can be determined according to the actual situation.

[0063] In one or more embodiments, the distance from the upper part 2a of the blade 2 to the upper end 3a of the annular portion 3 is 10%–60% of the axial dimension of the annular portion 3. That is, the depth to which the annular portion 3 is embedded in the blade 2 is 40%–90% of the axial dimension of the annular portion 3. Thus, while suppressing the axial dimension of the impeller, the reliability of the connection between the annular portion 3 and the plurality of blades 2 can also be ensured. However, this application is not limited to this, and the distance from the upper part 2a of the blade 2 to the upper end 3a of the annular portion 3 can also be other values, which can be determined according to actual needs.

[0064] In one or more embodiments, the outer diameter of the annular portion is not less than the outer diameter of the blade. For example, the outer diameter of the annular portion is 100%–110% of the outer diameter of the blade, but this application is not limited to this, and the ratio of the outer diameter of the annular portion to the outer diameter of the blade can also be other values. This ensures the radial dimension of the air inlet, thereby improving cooling performance.

[0065] In one or more embodiments, the inner diameter of the annular portion is 70%–108% of the outer diameter of the blade. That is, the inner diameter of the annular portion can be less than, equal to, or greater than the outer diameter of the blade, but the inner diameter of the annular portion is at least 70% of the outer diameter of the blade. Therefore, by limiting the inner diameter of the annular portion, the radial dimension of the air inlet can be ensured, thereby ensuring cooling performance. However, this application is not limited to this; the ratio of the inner diameter of the annular portion to the outer diameter of the blade can also be other values, and this application does not impose any limitations on this.

[0066] Figure 3 This is another schematic diagram of the impeller according to an embodiment of this application, showing the view from the axial side O along the central axis OO' towards the O' side. Figure 4 It is along Figure 3 The view seen when BB is cut open in the direction shown.

[0067] like Figure 3 and Figure 4 As shown, in one or more embodiments, the upper part 2a of the blade 2 is provided with an R angle P, that is, the upper part 2a of the blade forms an inclined surface, such as an arc inclined surface, thereby improving wind resistance, increasing air intake efficiency, and reducing noise.

[0068] In this embodiment, the R-angle P is located on the side of the blade near the negative pressure region, and the convex direction of the R-angle is opposite to the rotation direction of the impeller. For example... Figure 2 As shown, the impeller rotates in the following direction: Figure 2 In the case shown in the r-direction, the side of the upper R-angle P of blade 2 opposite to the r-direction, that is, the side closer to the negative pressure region, has the convex direction of R-angle P opposite to the rotation direction r of impeller 2. This further improves the cooling performance of the impeller.

[0069] In the embodiments of this application, there are no restrictions on the specific shape and setting method of the R-angle P. For example, the R-angle P can be formed at the entire position of the upper part of the blade, or at a part of the upper part of the blade, and can be set according to actual needs.

[0070] This application provides a fan. Figure 5 This is a schematic diagram of a fan according to an embodiment of this application.

[0071] like Figure 5 As shown, the fan 5 includes an impeller 1 and a base 6. Regarding the impeller 1, please refer to the description of the impeller 1 in the above embodiments, which is incorporated herein by reference and will not be repeated here. Figure 5 As shown, the base 6 is connected to the lower plate 4 of the impeller 1.

[0072] This application also provides an air supply device. Figures 6 to 9 This is a schematic diagram of the air supply device according to an embodiment of this application. Figure 6 This is a schematic diagram of the axial section. Figure 7 To observe the air supply device from above, Figure 8 To observe the air supply device from below, Figure 9 To observe the condition of the air supply device from the side.

[0073] Figures 6 to 9 As shown, the air supply device 7 includes a fan 5 and a cover 7. Regarding the fan 5, please refer to the description of the fan 5 in the above embodiment, the content of which is incorporated here and will not be repeated here:

[0074] like Figures 6 to 9 As shown, the cover 7 is connected to the fan 5 from above, and the air intake of the cover 7 is a curved surface S. Therefore, by forming the air intake of the cover 7 into a curved surface S, compared with the existing structure, such as the cover 7 being a right angle surface, the cover 7 of this application embodiment can improve air intake efficiency and improve cooling performance.

[0075] Furthermore, in the embodiments of this application, such as Figure 6 As shown, the portion of the cover 7 that mates with the annular portion 3 of the fan 5 can be curved. Thus, when the cover 7 is assembled with the fan 5 including the impeller 1, the annular portion 3 protruding from the blade 2 and the cover 7 mate to form a labyrinth structure. In this way, when the air supply device is working, the airflow outside the air supply device will have difficulty flowing into the fan through the gap between the cover and the fan 5, thereby preventing backflow into the fan and improving cooling performance.

[0076] It is worth noting that the above Figures 1 to 9 The impeller, fan, and air supply device in this application have only been illustratively described, but this application is not limited thereto. For details on each structure or component, please refer to related technologies. Furthermore, additional features may be added. Figures 1 to 9 Structures or components not shown, or reduced Figures 1 to 9 One or more structures or components in it. Figures 1 to 9 For any components or elements not specifically specified herein, please refer to relevant technologies; this application does not impose any limitations on them.

[0077] The embodiments of this application have been described above with reference to specific implementation methods. However, those skilled in the art should understand that these descriptions are exemplary and not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make various modifications and variations to the embodiments of this application based on the spirit and principles of the embodiments, and these modifications and variations are also within the scope of the embodiments of this application.

[0078] Preferred embodiments of the present application have been described above with reference to the accompanying drawings. Many features and advantages of these embodiments are apparent from this detailed description, and therefore the appended claims are intended to cover all such features and advantages falling within the true spirit and scope of these embodiments. Furthermore, since many modifications and alterations will readily occur to those skilled in the art, the embodiments of the present application are not intended to be limited to the precise structures and operations illustrated and described, but rather to encompass all suitable modifications and equivalents falling within their scope.

Claims

1. An impeller rotatable along a vertically extending shaft, the impeller having an air inlet at its upper portion, the impeller comprising: Multiple blades arranged circumferentially; An annular portion connecting the upper parts of the plurality of blades; as well as A lower plate that connects the lower portions of the multiple blades and extends radially. Its features are, In the axial direction, the upper end of the annular portion is located closer to the axially upward side than the upper part of the blade. Viewed radially, the lower end of the annular portion coincides with at least a portion of the upper part of the blade at the point where it connects to the blade.

2. The impeller according to claim 1, characterized in that, The inner circumference of the annular portion is provided with a plurality of recesses, the axial dimension of which is smaller than the axial dimension of the annular portion.

3. The impeller according to claim 2, characterized in that, The axial dimension of the recess is 30%–90% of the axial dimension of the annular portion.

4. The impeller according to claim 2, characterized in that, The radial dimension of the recess is 30%–80% of the radial dimension of the annular portion.

5. The impeller according to claim 2, characterized in that, The number of recesses is twice the number of blades.

6. The impeller according to claim 1, characterized in that, The axial height of the annular portion is less than the axial height of the blade.

7. The impeller according to claim 6, characterized in that, The axial height of the annular portion is 20%–90% of the axial height of the blade.

8. The impeller according to claim 1, characterized in that, The distance from the upper part of the blade to the upper end of the annular portion is 10%–60% of the axial dimension of the annular portion.

9. The impeller according to claim 1, characterized in that, The outer diameter of the annular portion is not less than the outer diameter of the blade.

10. The impeller according to claim 1, characterized in that, The inner diameter of the annular portion is 70%–108% of the outer diameter of the blade.

11. The impeller according to claim 1, characterized in that, The upper part of the blade is provided with an R angle.

12. The impeller according to claim 11, characterized in that, The R-angle is located on the side of the blade near the negative pressure region, and the convex direction of the R-angle is opposite to the rotation direction of the impeller.

13. A fan, characterized in that, The fan includes: The impeller as described in any one of claims 1 to 12; and The base, which connects to the lower plate of the impeller.

14. An air supply device, characterized in that, The air supply device includes: The fan as claimed in claim 13; and The cover is connected to the fan from above, and the air intake of the cover is curved.

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