CN106930974B

CN106930974B - Wind wheel and household appliance

Info

Publication number: CN106930974B
Application number: CN201610865361.1A
Authority: CN
Inventors: 滕国华; 叶似锦; 熊亮
Original assignee: Midea Group Co Ltd; GD Midea Environment Appliances Manufacturing Co Ltd
Current assignee: Midea Group Co Ltd; GD Midea Environment Appliances Manufacturing Co Ltd
Priority date: 2016-01-27
Filing date: 2016-09-29
Publication date: 2023-02-17
Anticipated expiration: 2036-09-29
Also published as: CN106930974A; CN206626015U

Abstract

The invention discloses a wind wheel and a household appliance. The wind wheel comprises a first hub, a second hub, a plurality of first blades and a plurality of second blades. The first hub and the second hub are coaxially arranged. A plurality of first blades are fixedly connected with the first hub and the second hub. A plurality of first blades are arranged at intervals. The plurality of second blades are fixed on the outer side surface of the second hub. The plurality of second blades are arranged at intervals. The total area of the first plurality of vanes is greater than the total area of the second plurality of vanes. In the above-mentioned wind wheel, because the total area of the first blade of wind wheel is greater than the total area of blade, first blade produces great influence to the whole air current that the wind wheel produced, makes first blade and second blade produce the air current and can spread after joining to increase the area of blowing of wind wheel, satisfied user's demand.

Description

Wind wheel and household appliance

Technical Field

The invention relates to the field of household appliances, in particular to a wind wheel and a household appliance.

Background

The wind wheel of the existing double-layer fan blade structure can ensure that wind power is concentrated, and the blowing distance of the wind wheel is increased. However, the inner layer blades of the wind wheel with the existing double-layer fan blade structure are small, the influence on the whole airflow is small, the blowing area of the wind wheel is too small, and the user requirements cannot be met.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a wind wheel and a household appliance.

The wind wheel of the embodiment of the invention comprises a first hub, a second hub, a plurality of first blades and a plurality of second blades. The first hub and the second hub are coaxially arranged. The plurality of first blades are fixedly connected with the first hub and the second hub. The plurality of first blades are arranged at intervals. The plurality of second blades are fixed to an outer side surface of the second hub. The plurality of second blades are arranged at intervals. The total area of the first plurality of vanes is greater than the total area of the second plurality of vanes.

In the above-mentioned wind wheel, because the total area of first blade is greater than the total area of second blade, first blade produces great influence to the whole air current of wind wheel, makes first blade and second blade produce the air current and can spread after joining to increase the area of blowing of wind wheel, satisfied user's demand.

In certain embodiments, the angle of attack of the first blade is greater than the angle of attack of the second blade.

In some embodiments, the first plurality of blades are radially spaced about the first hub.

In some embodiments, the plurality of second blades are radially spaced apart about the first hub.

In some embodiments, the first blades are evenly distributed along a circumferential direction of the first hub.

In some embodiments, the second blades are evenly distributed along a circumferential direction of the second hub.

In certain embodiments, the first blade is an airfoil blade.

In some embodiments, the second blade is an airfoil blade

In some embodiments, a ratio of a total area of the plurality of first blades to a sum of areas of gaps between adjacent two of the first blades is greater than 1 and less than 3.

In certain embodiments, a ratio of a total area of the plurality of second blades to a sum of areas of gaps between adjacent two of the second blades is greater than 1 and less than 4.

In some embodiments, a ratio of a total area of the plurality of first blades to a sum of areas of gaps between adjacent two of the first blades is smaller than a ratio of a total area of the plurality of second blades to a sum of areas of gaps between adjacent two of the second blades.

In some embodiments, the rotor is a one-piece structure.

The household appliance of the embodiment of the invention comprises the wind wheel.

Due to the fact that the wind wheel is applied to the household appliance, the air blowing area of the household appliance in the using process is larger, and the requirements of a user can be met.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic plan view of a wind rotor according to an embodiment of the invention.

Fig. 2 is a schematic view of the working principle of a wind turbine according to an embodiment of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to 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 illustrative only for the purpose of explaining the present invention and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. The first feature being "under," "beneath," and "under" the second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Moreover, the present invention may repeat reference numerals and/or reference letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.

Referring to fig. 1 and 2, a wind turbine 100 according to an embodiment of the present invention includes a first hub 10, a second hub 20, a plurality of first blades 30, and a plurality of second blades 40.

The first hub 10 is coaxially disposed with the second hub 20. A plurality of first blades 30 fixedly connect the first hub 10 and the second hub 20. The plurality of first blades 30 are arranged at intervals. The second plurality of blades 40 are fixed to the outer side surface 22 of the second hub 20. The plurality of second blades 40 are arranged at intervals. The total area Σ S1 of the plurality of first blades 30 is greater than the total area Σ S2 of the plurality of second blades 40.

In the wind wheel 100, because the total area of the first blades 30 of the wind wheel 100 is greater than the total area of the second blades 40, the first blades 30 have a large influence on the whole airflow generated by the wind wheel 100, so that the first blades 30 and the second blades 40 generate airflow and can be diffused after being converged, the blowing area of the wind wheel 100 is increased, and the requirements of users are met.

In addition, the air flows generated by the first blade 30 and the second blade 40 converge and interact with each other, so that the vortex effect generated by the centrifugal force of the wind wheel 100 can be reduced, the diffused wind is closer to natural wind, and the user experience is improved.

The inventor compares the detected parameters of the wind wheel 100 according to the embodiment of the invention and the existing wind wheel under the same condition, wherein the comparison of the air volume and the noise when the rotating speed is close to obtain the following table 1:

TABLE 1

When the air volume is the same, the noise is compared to obtain table 2:

TABLE 2

As can be seen from table 1, when the rotation speed is close to the rotation speed, the air volume of the wind wheel 100 of the present embodiment is significantly larger than that of the existing wind wheel, but the noise difference is small, and the influence on the user is not great.

As can be seen from table 2, when the air volume is the same, the noise of the wind wheel 100 of the embodiment is obviously lower than that of the existing wind wheel, and the rotating speed and power are also obviously lower than that of the existing wind wheel, so that the electric quantity can be saved.

In the present embodiment, it is understood that the first hub 10 is an inner hub and the second hub 20 is an outer hub. The first blade 30 is an inner blade and the second blade 40 is an outer blade.

The first hub 10 is closer to the rotation center of the wind rotor 100 than the second hub 20, and the first blade 30 is closer to the rotation center of the wind rotor 100 than the second blade 40.

Specifically, the inner end edges 32 of the first plurality of blades 30 are attached to the outer sidewall 12 of the first hub 10. The outer end edges 34 of the first plurality of vanes 30 are attached to the inner side 24 of the second hub 20.

The first hub 10 and the second hub 20 are directly connected by the first blade 30, so that the structural complexity of the wind wheel 100 is reduced, and the wind wheel 100 is easier to manufacture.

In the present embodiment, the plurality of first blades 30 are radially spaced apart from each other around the first hub 10.

Thus, the first blades 30 are connected to the first hub 10 and the second hub 20, and the strength of the wind turbine 100 can be improved.

In the present embodiment, the plurality of second blades 40 are radially spaced apart from each other around the first hub 10.

Therefore, the air inlet area of the wind wheel 100 can be increased, and the increase of the air output of the wind wheel 100 is facilitated.

In the present embodiment, the first blades 30 are uniformly distributed along the circumferential direction of the first hub 10.

That is to say, the distance between any two adjacent first blades 30 in the circumferential direction is equal or the included angle between any two adjacent first blades 30 is equal, which is convenient for manufacturing the wind wheel 100, and also enables the first blades 30 to generate airflow with uniform speed in the circumferential direction, and ensures that the airflow generated by the first blades 30 and the second blades 40 can be diffused after being merged, thereby increasing the blowing area of the wind wheel 100.

In the present embodiment, the second blades 40 are uniformly distributed along the circumferential direction of the second hub 20.

Thus, the manufacturing of the wind wheel 100 is facilitated, and the density of the generated airflow of the wind wheel 100 is uniform, which is beneficial to the flow of the air.

In addition, the first blades 30 and the second blades 40 are uniformly distributed along the circumferential direction of the wind wheel 100, and it can be ensured that the mass center of gravity of the wind wheel 100 is located on the rotation center of the wind wheel 100 when the wind wheel 100 is in a static state. This can reduce vibration when the wind rotor 100 rotates, thereby reducing noise generated by the rotation of the wind rotor 100.

Specifically, the first hub 10 is provided with a central hole 14, and the wind wheel 100 can be connected to a rotating shaft of a motor through the central hole 14, and the motor drives the wind wheel 100 to rotate.

In the present embodiment, the attack angle of the first blade 30 is larger than the attack angle of the second blade 40.

Thus, the wind wheel 100 has better aerodynamic performance, the efficiency of the wind wheel 100 is improved, and compared with the traditional wind wheel, the wind wheel 100 of the embodiment has larger wind quantity generated by the wind wheel 100 under the same rotating speed.

In the present embodiment, the first blade 30 is an airfoil blade.

Because the airfoil blades have better aerodynamic performance, the aerodynamic performance of each first blade 30 can be improved, and the influence of the first blades 30 on the whole airflow of the wind wheel 100 is larger, so that the aerodynamic performance of the wind wheel 100 can be improved, the power loss of the wind wheel 100 is reduced, and energy (such as electric energy) is saved.

Specifically, the plurality of first blades 30 have the same structure, that is, the entire structure of each first blade 30 is the same, which facilitates the manufacture of the wind turbine 100.

Further, the first blade 30 is a twisted airfoil blade. Since the shape of the twisted blades conforms to the flow law of the air flow, the loss of the air flow can be reduced, and the efficiency of the wind wheel 100 can be improved.

Preferably, the second blade 40 is an airfoil blade. This may further improve the aerodynamic performance of the wind rotor 100.

In addition, the airfoil blade is designed, for example, with a wing of a bird as a bionic object. Specifically, in one example, the first blade 30 may be configured as a secondary plume and the second blade 40 may be configured as a primary plume, which may allow two different blade layers to be configured, which may be advantageous: 1. the appearance of the blade adopts a bionic design, so that the blade has good pneumatic performance and is integrally attractive after being assembled; 2. the double-layer blade design can increase the air sweeping area and improve the air quantity; 3. the design of the middle and outer hubs of the double-layer blades improves the strength of the blades and prolongs the service life.

In the present embodiment, the ratio Σ S1 'between the total area Σ S1 of the plurality of first blades 30 and the sum Σ S1' of the areas of the gaps between the adjacent two first blades 30 is greater than 1 and smaller than 3.

That is, 1< Σ S1/Σ S1' <3. According to experimental tests, when the ratio Σ S1/Σ S1' is greater than 1 and smaller than 3, the first blade 30 has a better aerodynamic performance, the wind wheel 100 has a larger wind volume, and the blowing area is larger.

In the present embodiment, the ratio Σ S2 'between the total area Σ S2 of the plurality of second blades 40 and the sum Σ S2' of the areas of the gaps between two adjacent second blades 40 is greater than 1 and smaller than 4.

That is, 1< Σ S2/Σ S2' <4. According to experimental tests, when the range of Σ S2/Σ S2' is greater than 1 and smaller than 4, the aerodynamic performance of the wind wheel 100 can be further enhanced, so that the wind blowing amount of the wind wheel 100 is larger, and the wind blowing area is wider.

In the present embodiment, the ratio Σ S1/Σ S1 'of the total area Σ S1 of the plurality of first blades 30 and the sum Σ S1' of the areas of the gaps between the adjacent two first blades 30 is smaller than the ratio Σ S2/Σ S2 'of the total area Σ S2 of the plurality of second blades 40 and the sum Σ S2' of the areas of the gaps between the adjacent two second blades 40.

That is, Σ S1/Σ S1'< Σ S2/Σ S2'. As a result, the first blades 30 are distributed more sparsely in the circumferential direction of the first hub 10 than the second blades 40 are distributed more sparsely in the circumferential direction of the second hub 20. Therefore, the air inlet volume of the wind wheel 100 can be ensured to be sufficient, and the requirement of large air volume of the wind wheel 100 can be met.

Specifically, in the present embodiment, the number of the first blades 30 is 7, and the number of the second blades 40 is 9.

In other embodiments, the specific number of first and second blades may be determined based on the actual situation. In such other embodiments, it is preferable that the ratio of the total area of the plurality of first blades to the sum of the areas of the gaps between the adjacent two first blades is smaller than the ratio of the total area of the plurality of second blades to the sum of the areas of the gaps between the adjacent two second blades.

It should be noted that the total area Σ S1 of the plurality of first blades 30, the area S1 of the gap between two adjacent first blades 30 ', the total area Σ S2 of the plurality of second blades 40, and the area S2' of the gap between two adjacent second blades 40 are areas measured after the wind turbine 100 is forward projected, and a forward projected view of the wind turbine 100 is the view of the wind turbine 100 in fig. 1.

The area S1' of the gap between two adjacent first blades 30 is the area of the figure formed by the contour lines of the two adjacent first blades 30, the contour line of the first hub 10, and the contour line of the second hub 20 after the wind wheel 100 is projected in the forward direction.

For example, in fig. 1, the area of the figure surrounded by the line segments L1, L2, L3, and L4 is the area S1' of the gap between two adjacent first blades 30.

The total area Σ S1 of the plurality of first blades 30 is the sum of the areas S1 of the figures surrounded by the contour lines of each first blade 30 after the wind wheel 100 is projected in the forward direction.

The area S2' of the gap between two adjacent second blades 40 is the area of a figure enclosed by the contour lines of the two adjacent second blades 40, the contour line of the second hub 20 and the extension line (shown by a dotted line in fig. 1) of the outer edge contour line of the second blades 40 after the wind wheel 100 is projected in the forward direction.

In this embodiment, it is preferable that the wind wheel 100 is an integrally formed structure.

Specifically, the material of the wind wheel 100 may be plastic, and the structure of the wind wheel 100 is manufactured through an injection molding process.

Therefore, the processing technology of the wind wheel 100 is simple, the manufacturing cost of the wind wheel 100 is reduced, the strength of the first blade 30 and the second blade 40 can be improved, and the first blade 30 and the second blade 40 are not easy to damage.

The home appliance of the embodiment of the present invention includes the wind wheel 100 described above.

Due to the application of the wind wheel 100 to the household appliance, the air blowing area of the household appliance is larger in the using process, and the requirements of users can be met.

The household appliance is, for example, a fan, a heater, or an air conditioner, which has a wind wheel.

In the description herein, references to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A wind turbine, comprising:

a first hub;

a second hub disposed coaxially with the first hub;

a plurality of first blades fixedly connected with the first hub and the second hub, wherein the plurality of first blades are arranged at intervals; and

the second blades are fixed on the outer side face of the second hub and are arranged at intervals;

a total area of the first plurality of vanes is greater than a total area of the second plurality of vanes;

the ratio of the total area of the plurality of first blades to the sum of the areas of the gaps between two adjacent first blades is smaller than the ratio of the total area of the plurality of second blades to the sum of the areas of the gaps between two adjacent second blades.

2. A wind rotor according to claim 1, wherein the angle of attack of the first blade is greater than the angle of attack of the second blade.

3. The wind rotor of claim 1 wherein the first plurality of blades are radially spaced about the first hub.

4. A wind turbine according to claim 1, wherein the second plurality of blades are radially spaced about the first hub.

5. The wind rotor of claim 1, wherein the first blades are evenly distributed along a circumferential direction of the first hub.

6. The wind rotor of claim 1 wherein the second blades are evenly distributed along the circumferential direction of the second hub.

7. A wind rotor according to claim 1, wherein said first blade is an airfoil blade.

8. The wind rotor of claim 1, wherein the second blade is an airfoil blade.

9. A wind rotor according to claim 1, wherein a ratio of a total area of the plurality of first blades to a sum of areas of gaps between adjacent two of the first blades is greater than 1 and less than 3.

10. The wind rotor according to claim 1, wherein a ratio of a total area of the plurality of second blades to a sum of areas of gaps between adjacent two of the second blades is greater than 1 and less than 4.

11. The wind rotor according to claim 1, wherein the wind rotor is of an integrally formed structure.

12. A household appliance, characterized in that it comprises a wind wheel according to any of claims 1 to 11.