Movable impeller, fan and sweeper

Abstract

The embodiment of the utility model provides a movable impeller, a fan and a sweeper, the movable impeller comprises a first cover plate, a second cover plate and a plurality of blades arranged between the first cover plate and the second cover plate, the plurality of blades are arranged at intervals in the circumferential direction of the second cover plate with the central axis of the second cover plate as the center, and the blades are arranged in the circumferential direction of the second cover plate. The distance between every two adjacent blades close to the outer side is not larger than the distance between every two adjacent blades close to the inner side. According to the embodiment of the invention, the power conversion efficiency is improved, and the static pressure is improved under the condition that the input power consumption is not changed.

Description

Technical Field

[0001] This application relates to the field of electromechanical technology, and in particular to a moving impeller, a fan, and a sweeper. Background Technology

[0002] Fans are widely used in various devices, such as smart home devices and ventilation and air conditioning equipment. Smart home devices include, but are not limited to, robot vacuum cleaners, while fans include centrifugal fans and mixed-flow fans.

[0003] A fan typically includes an impeller assembly and a housing surrounding the impeller assembly. The impeller assembly typically includes an upper cover plate, a lower cover plate, and multiple blades disposed between the upper and lower cover plates, with airflow channels formed between adjacent blades.

[0004] In some existing structures, the impeller assembly uses a gradually widening design for multiple blades, meaning that the spacing between adjacent blades gradually increases radially from the inside out.

[0005] 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. Utility Model Content

[0006] The inventors of this application have discovered that, in, for example, centrifugal fans, for impeller assemblies with a gradually widening design, when the fan is operating, the airflow diffusing towards the outer periphery slows down due to the gradually widening airflow channel. In other words, the static pressure of the airflow decreases, and the fluid power and pressure energy decrease, resulting in lower power conversion efficiency when the input electrical power or kinetic energy remains unchanged.

[0007] To address at least one of the aforementioned problems or other similar issues, embodiments of this application provide a moving impeller, a fan, and a sweeper to improve power conversion efficiency and increase static pressure without changing power consumption.

[0008] According to an embodiment of the first aspect of this application, a moving impeller is provided, including a first cover plate, a second cover plate, and a plurality of blades disposed between the first cover plate and the second cover plate, wherein...

[0009] The plurality of blades are arranged at intervals along the circumference of the second cover plate, with the central axis of the second cover plate as the center.

[0010] Between two adjacent blades, the distance between the outermost blades should not be greater than the distance between the innermost blades.

[0011] In one or more embodiments, the spacing between two adjacent blades conforms to the following relationship:

[0012] 0.5L1≦L3≦L1,

[0013] Where L1 is the innermost distance between two adjacent blades, and L3 is the outermost distance between two adjacent blades.

[0014] In one or more embodiments, the blade is arc-shaped, and the curvature of the blade gradually decreases from the inside to the outside.

[0015] In one or more embodiments, the exit angle of the blade is any value in the range of 0° to 15°.

[0016] In one or more embodiments, the inlet angle of the blade is any value in the range of 45° to 55°.

[0017] In one or more embodiments, the number of blades is 7 to 9.

[0018] In one or more embodiments, the radial dimension of the first cover plate is smaller than the radial dimension of the second cover plate.

[0019] In one or more embodiments, on the axial section of the moving impeller, the angle between the line connecting the edge of the first cover plate and the edge of the second cover plate and the axial direction is any value within the range of 0° to 30°.

[0020] According to an embodiment of the second aspect of this application, a fan is provided, the fan including a moving impeller as described in an embodiment of the first aspect of this application.

[0021] According to an embodiment of a third aspect of this application, a sweeping machine is provided, the sweeping machine including a moving impeller as described in an embodiment of a first aspect of this application.

[0022] One beneficial effect of this application embodiment is that the distance between the outermost two adjacent blades is no greater than the distance between the innermost blades. As a result, the airflow diffusing towards the periphery has a higher airflow velocity due to the gradually narrowing airflow channel, which increases the static pressure of the airflow, as well as the fluid power and pressure energy, thereby improving the power conversion efficiency and increasing the static pressure without changing the input power consumption.

[0023] 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.

[0024] 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

[0025] 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.

[0026] 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:

[0027] Figure 1 This is a three-dimensional schematic diagram of the moving impeller according to an embodiment of this application;

[0028] Figure 2 This is another schematic diagram of the moving impeller according to an embodiment of this application;

[0029] Figure 3 This is a schematic diagram of the second cover plate and blades of the moving impeller according to an embodiment of this application;

[0030] Figure 4 yes Figure 3 A top view of the second cover plate and blades shown;

[0031] Figure 5 This is a schematic diagram of a fan according to an embodiment of this application. Detailed Implementation

[0032] 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.

[0033] 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.

[0034] 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.

[0035] In the embodiments of this application, for ease of explanation, the central axis OO' of the moving 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 moving impeller, fan, and sweeper during use and manufacturing.

[0036] 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.

[0037] This application provides a moving impeller. Figure 1 This is a three-dimensional schematic diagram of the moving impeller according to an embodiment of this application. Figure 2 This is another schematic diagram of the moving impeller according to an embodiment of this application, showing the case where the moving impeller is cut along the shaft.

[0038] like Figure 1 and Figure 2 As shown, the impeller 1 includes a first cover plate 2, a second cover plate 3, and a plurality of blades 4 disposed between the first cover plate 2 and the second cover plate 3.

[0039] Figure 3 This is a schematic diagram of the second cover plate and blades of the moving impeller according to an embodiment of this application. Figure 4 yes Figure 3 A top view of the second cover plate and blades shown.

[0040] like Figure 3 and Figure 4As shown, multiple blades 4 are arranged circumferentially around the central axis OO' of the second cover plate 3. The distance between two adjacent blades 4 on the outer side is no greater than the distance on the inner side. That is, the distance between two adjacent blades 4 gradually decreases from the inside to the outside, or the distance between two adjacent blades 4 is equal from the inside to the outside. For example, for any two positions on a blade 4, the distance between the radially outer position and the adjacent blade is less than the distance between the radially inner position and the adjacent blade, or the distance between the radially outer position and the adjacent blade is equal to the distance between the radially inner position and the adjacent blade.

[0041] In this way, the distance between two adjacent blades is no greater on the outer side than on the inner side. As a result, the airflow diffusing towards the periphery increases in velocity due to the narrowing airflow channel, leading to increased static pressure, fluid power, and pressure energy, thus improving power conversion efficiency and increasing static pressure without changing the input power consumption.

[0042] For example, in the existing airflow channel gradually expanding design, the effect of the airflow in establishing a pressure field during the outflow process is relatively weak. However, in the embodiment of this application, the airflow is accelerated during the outflow process due to the gradual narrowing of the airflow channel. When the outlet end is closed, the dynamic pressure corresponding to the airflow velocity will be converted into static pressure, which can drive more airflow, thereby obtaining a higher maximum static pressure value and improving fluid power and pressure energy.

[0043] like Figure 4 As shown, in one or more embodiments, the spacing between two adjacent blades conforms to the following relationship:

[0044] 0.5L1≦L3≦L1,

[0045] Where L1 is the innermost distance between two adjacent blades, and L3 is the outermost distance between two adjacent blades.

[0046] like Figure 4 As shown, taking two adjacent blades 4a and 4b as an example, the innermost distance L1 between them can be the length of the line connecting the innermost radial endpoint p1 of blade 4a and the position p4 on blade 4b. The position p4 on blade 4b is the intersection of the normal line on blade 4a passing through endpoint p1 and blade 4b.

[0047] like Figure 4 As shown, the outermost distance L3 between two adjacent blades 4a and 4b can be the length of the line connecting the radially outermost position p3 of blade 4a and the radially outermost endpoint p6 of blade 4b, wherein the normal at position p3 of blade 4a passes through endpoint p6 of blade 4b.

[0048] It is worth noting that the above is only an example. The spacing between two adjacent blades can also be other sizes, as long as the spacing between two adjacent blades 4 gradually decreases from the inside to the outside or is equal from the inside to the outside.

[0049] For example, such as Figure 4 As shown, position p2 on blade 4a is between p1 and p3. The intersection point of the normal line passing through position p2 and blade 4b is p5. Let the length of the line connecting p2 and p5 be L2. Then, the spacing between two adjacent blades 4a and 4b can satisfy the following relationship: L1 < L2 < L3. This makes the spacing between two adjacent blades gradually decrease from the inside to the outside. Here, L1 can represent the spacing between the position on blade 4a that is closer to the radially inner side than position p2 and blade 4b, and L3 can represent the spacing between the position on blade 4a that is closer to the radially outer side than position p2 and blade 4b. Furthermore, when the spacing between adjacent blades is equal, for example, when L1, L2, and L3 are all equal, a similar effect can also be achieved.

[0050] like Figure 3 and Figure 4 As shown, in one or more embodiments, the blade 4 can be arc-shaped, with the curvature of the blade gradually decreasing from the inside to the outside. This ensures that the distance between two adjacent blades 4 gradually decreases or remains equal from the inside to the outside.

[0051] However, this application is not limited to this. The blade 4 can also be other shapes. This application does not limit this, as long as the distance between two adjacent blades 4 gradually decreases from the inside to the outside or is equal.

[0052] In one or more embodiments, the number of blades can be seven. In the impeller assembly, by setting the number of blades to a prime number, effects such as reducing resonance, optimizing airflow distribution, balancing centrifugal force, and reducing noise can be achieved. Thus, compared with the prior art scheme that sets the number of blades to, for example, eight, setting the number of blades to seven can further improve the performance of the moving impeller.

[0053] However, this application is not limited to this. The number of leaves can also be other values, such as 3, 5 or 9. In addition, it can also be 8 or other numbers. This application does not limit this and can choose according to actual needs.

[0054] like Figure 3 and Figure 4 As shown, in one or more embodiments, the blades are arc-shaped, and the curvature of the blades gradually decreases from the inside to the outside. This ensures that the distance between two adjacent blades 4 gradually decreases from the inside to the outside.

[0055] like Figure 4As shown, in one or more embodiments, the blade inlet angle α is any value within the range of 45° to 55°. For example, the inlet angle α is 50° or other angle values ​​within the range of 45° to 55°. Furthermore, the blade inlet angle α can also be, for example, less than 45° or greater than 55°, such as 43° or 57°. Here, the blade inlet angle refers to the angle between the tangent direction of the blade's outer edge and the line connecting the blade inlet and the impeller center. For example, as... Figure 4 As shown, l1 is the line connecting p7 at the blade inlet and O2 at the impeller center, l2 is the tangent line of the outer edge of blade 4c, that is, the circumferential tangent direction of p7 at the inlet, and the included angle α between l1 and l2 is the inlet angle of the blade.

[0056] The inventors of this application have discovered that when the inlet angle of the blades and the airflow direction are mismatched, severe airflow separation occurs, affecting impeller efficiency. For example, in some existing fan structures, the blade inlet angle is approximately 64°. Simulations by the inventors revealed that this structure causes significant airflow separation, impacting impeller efficiency. In the embodiments of this application, by reducing the blade inlet angle to a suitable size, airflow separation on the windward side can be reduced, suppressing the decrease in impeller efficiency. Figure 4 As shown, in one or more embodiments, the exit angle b of the blade is any value within the range of 0° to 15°. For example, the exit angle b is 5° or other angle values ​​within the range of 0° to 15°. Furthermore, the exit angle α of the blade can also be, for example, greater than 15°, such as 20° or 25°. Here, the exit angle of the blade refers to the angle between the tangent direction of the blade's outer edge and the tangent direction of the impeller's outer diameter. For example, as... Figure 4 As shown, l4 is the tangent to the outer edge of the blade, that is, the circumferential tangent direction of p8 at the blade exit, l5 is the tangent direction to the outer diameter of the impeller, that is, the tangent direction to the outer diameter of p8 at the exit, and the included angle b between l4 and l5 is the exit angle of the blade.

[0057] The inventors of this application have discovered that in some existing wind turbine structures, the blade exit angle is approximately 32°. A large exit angle is not conducive to the energy conversion efficiency of centrifugal force. In the embodiments of this application, experimental simulations have shown that by setting the blades to a reduced structure and reducing the blade exit angle, the conversion efficiency of kinetic or mechanical energy to pressure energy can be further improved.

[0058] In one or more embodiments, such as Figure 2As shown, the radial dimension of the first cover plate 2 is smaller than the radial dimension of the second cover plate 3. In this embodiment, the first cover plate 2 covers the upper end (axial side O) of the blade 4, and the second cover plate 3 covers the lower end (axial side O') of the blade 4. Thus, the blade 4 has a shape with a smaller upper end and a larger lower end. The inventors of this application discovered through simulation that forming a larger opening above the impeller can promote the flow of air above, thereby increasing the flow velocity. Therefore, by making the radial dimension of the first cover plate 2 smaller than the radial dimension of the second cover plate 3, the energy conversion efficiency of the impeller can be further improved in this embodiment.

[0059] For example, such as Figure 2 As shown, in one or more embodiments, on the axial section of the impeller 1, the angle c between the line l6 connecting the edge of the first cover plate 2 and the edge of the second cover plate 3 and the axial direction l7 is any value within the range of 0° to 30°. This ensures that a larger opening is formed above the impeller (on the axial side O), thereby driving the airflow above to increase the flow velocity. For example, the angle c can be 7° or other angle values ​​within the range of 0° to 30°, such as 18° or 20°. Furthermore, the angle c can also be, for example, greater than 30°. This application does not limit this and the angle can be selected according to the actual situation.

[0060] This application provides a fan. Figure 5 This is a schematic diagram of a fan according to an embodiment of this application, as shown below. Figure 5 As shown, the fan 5 includes a moving impeller 1. For details regarding the moving impeller 1 in the above embodiments, please refer to the description of the moving impeller 1, which is incorporated herein by reference and will not be repeated here. Furthermore, as... Figure 5 As shown, the fan 5 may also include a housing 6 surrounding the impeller 1, and an air inlet 7 and an air outlet 8 formed on the housing 6. For details, please refer to the relevant technology, which will not be described in detail here.

[0061] In addition, this application provides a sweeping machine, such as a sweeping robot, which includes a moving impeller 1. For details, please refer to the description of the moving impeller 1 in the above embodiments, the content of which is incorporated herein and will not be repeated here.

[0062] According to an embodiment of this application, the distance between the outermost two adjacent blades is no greater than the distance between the innermost blades. Therefore, the airflow diffusing outwards increases in velocity due to the converging airflow channel, resulting in increased static pressure, fluid power, and pressure energy, thus improving power conversion efficiency and increasing static pressure without changing the input power consumption.

[0063] It is worth noting that the above Figures 1 to 5 The impeller in this application is only illustrated schematically, but this application is not limited thereto. For details on various structures or components, please refer to related technologies. Furthermore, additional details may be added. Figures 1 to 5Structures or components not shown, or reduced Figures 1 to 5 One or more structures or components in it. Figures 1 to 5 For any components or elements not specifically specified herein, please refer to relevant technologies; this application does not impose any limitations on them.

[0064] 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.

[0065] 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. A moving impeller, comprising a first cover plate, a second cover plate, and a plurality of blades disposed between the first cover plate and the second cover plate, characterized in that, The plurality of blades are arranged at intervals along the circumference of the second cover plate, with the central axis of the second cover plate as the center. Between two adjacent blades, the distance between the outermost blades should not be greater than the distance between the innermost blades.

2. The moving impeller according to claim 1, characterized in that, The spacing between two adjacent blades conforms to the following relationship: 0.5L1≦L3≦L1, Where L1 is the innermost distance between two adjacent blades, and L3 is the outermost distance between two adjacent blades.

3. The moving impeller according to claim 1, characterized in that, The blade is arc-shaped, and the curvature of the blade gradually decreases from the inside to the outside.

4. The moving impeller according to claim 1, characterized in that, The exit angle of the blade is any value within the range of 0° to 15°.

5. The moving impeller according to claim 1, characterized in that, The inlet angle of the blade is any value within the range of 45° to 55°.

6. The moving impeller according to claim 1, characterized in that, The number of blades is 7 to 9.

7. The moving impeller according to claim 1, characterized in that, The radial dimension of the first cover plate is smaller than the radial dimension of the second cover plate.

8. The moving impeller according to claim 1 or 7, characterized in that, On the axial section of the impeller, the angle between the line connecting the edge of the first cover plate and the edge of the second cover plate and the axial direction is any value within the range of 0° to 30°.

9. A fan, characterized in that, The fan includes a moving impeller as described in any one of claims 1 to 8.

10. A sweeping machine, characterized in that, The sweeper includes a moving impeller as described in any one of claims 1 to 8.

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