CN106930974B - Wind wheel and household appliance - Google Patents

Abstract

The invention discloses a wind wheel and a household appliance. The wind wheel includes 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 arranged coaxially. A plurality of first blades are fixedly connected to the first hub and the second hub. A plurality of first blades are arranged at intervals. A plurality of second blades are fixed on the outer surface of the second hub. A plurality of second blades are arranged at intervals. The total area of the plurality of first blades is greater than the total area of the plurality of second blades. In the above-mentioned wind rotor, since the total area of the first blade of the wind rotor is greater than the total area of the blades, the first blade has a greater impact on the overall airflow generated by the wind rotor, so that the first blade and the second blade can generate airflow after converging. Diffusion, thereby increasing the blowing area of the wind wheel, to meet the needs of users.

Description

Wind Wheel and Household Appliances

technical field

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

Background technique

The existing wind rotor with double-layer fan blade structure can ensure the concentration of wind force and increase the blowing distance of the wind rotor. However, the inner blades of the wind wheel with the existing double-layer wind blade structure are relatively small, which has little influence on the overall air flow, so that the blowing area of the wind wheel is too small to meet the needs of users.

Contents of the invention

The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the present invention provides a wind wheel and a household appliance.

The wind rotor according to the embodiment of the present invention includes a first hub, a second hub, a plurality of first blades and a plurality of second blades. The first hub is arranged coaxially with the second hub. The plurality of first blades are fixedly connected to the first hub and the second hub. The plurality of first blades are arranged at intervals. The plurality of second blades are fixed on the outer surface of the second hub. The plurality of second blades are arranged at intervals. The total area of the plurality of first blades is greater than the total area of the plurality of second blades.

In the above-mentioned wind wheel, since the total area of the first blade is larger than the total area of the second blade, the first blade has a greater influence on the overall airflow of the wind wheel, so that the airflow generated by the first blade and the second blade can be diffused after converging. Thereby the blowing area of the wind wheel is increased, which meets the needs of users.

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

In some embodiments, the plurality of first blades are radially arranged at intervals around the first hub.

In some embodiments, the plurality of second blades are radially arranged at intervals around the first hub.

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

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

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

In some embodiments, the second blade is an airfoil blade

In some embodiments, 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 greater than 1 and less than 3.

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

In some embodiments, 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 total area of the plurality of second blades and The ratio of the sum of the areas of the gaps between two adjacent second blades.

In some embodiments, the wind wheel is integrally formed.

A household appliance according to an embodiment of the present invention includes the above-mentioned wind wheel.

Since the above-mentioned wind wheel is applied to the household appliance in this embodiment, the blowing area of the household appliance is larger during use, which can meet the needs of users.

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

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and comprehensible from the description of the embodiments in conjunction with the following drawings, wherein:

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

Fig. 2 is a schematic diagram of the working principle of the wind wheel according to the embodiment of the present invention.

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the 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 by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Orientation indicated by rear, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, etc. The positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, Therefore, it should not be construed as limiting the invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of said features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically connected, or electrically connected, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediary, and it can be the internal communication of two components or the interaction of two components relation. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In the present invention, unless otherwise clearly specified and limited, a first feature being "on" or "under" a second feature may include direct contact between the first and second features, and may also include the first and second features Not in direct contact but through another characteristic contact between them. Moreover, "above", "above" and "above" the first feature on the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. "Below", "below" and "under" the first feature to the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is less horizontal than the second feature.

The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, components and arrangements of specific examples are described below. Of course, they are only examples and are not intended to limit the invention. Furthermore, the present disclosure may repeat reference numerals and/or reference letters in different instances, such repetition is for simplicity and clarity and does not in itself indicate a relationship between the various embodiments and/or arrangements discussed. In addition, various specific process and material examples are provided herein, but one of ordinary skill in the art may recognize the use of other processes and/or the use of other materials.

Referring to FIG. 1 and FIG. 2 , the wind rotor 100 according to the 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 and the second hub 20 are arranged coaxially. A plurality of first blades 30 are fixedly connected to the first hub 10 and the second hub 20 . A plurality of first blades 30 are arranged at intervals. A plurality of second blades 40 are fixed on the outer surface 22 of the second hub 20 . A plurality of second blades 40 are arranged at intervals. The total area ΣS1 of the plurality of first blades 30 is greater than the total area ΣS2 of the plurality of second blades 40 .

In the above-mentioned wind wheel 100, since 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 greater impact on the overall airflow generated by the wind wheel 100, so that the first blades 30 The air flow generated by the second blade 40 can be diffused after merging, thereby increasing the blowing area of the wind wheel 100 and meeting the needs of users.

In addition, the confluence and interaction of the airflow generated by the first blade 30 and the second blade 40 can reduce the vortex effect generated by the centrifugal force of the wind wheel 100 , making the diffused wind closer to natural wind and improving user experience.

The inventor compared the detected parameters of the wind rotor 100 according to the embodiment of the present invention with the existing wind rotor under the same conditions, wherein the air volume and noise were compared to obtain Table 1 when the rotational speeds were close:

Table 1

When the air volume is the same, the noise is compared to get Table 2:

Table 2

It can be seen from Table 1 that when the rotational speed is close, the air volume of the wind rotor 100 in this embodiment is obviously greater than that of the existing wind rotor, but the difference in noise is relatively small, and has little impact on users.

It can be seen from Table 2 that when the air volume is the same, the noise of the wind rotor 100 in this embodiment is significantly lower than that of the existing wind rotor, and the speed and power are also significantly lower than the existing wind rotor, thus saving electricity.

It should be noted that, in this embodiment, it can be 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 plurality of first blades 30 are connected to the outer sidewall 12 of the first hub 10 . The outer end edges 34 of the plurality of first blades 30 are connected 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 , which reduces the structural complexity of the wind rotor 100 and makes the wind rotor 100 easier to manufacture.

In this embodiment, a plurality of first blades 30 are radially arranged at intervals around the first hub 10 .

In this way, it is beneficial for the first blade 30 to be connected to the first hub 10 and the second hub 20 , and the strength of the wind wheel 100 can be improved.

In this embodiment, a plurality of second blades 40 are radially arranged at intervals around the first hub 10 .

In this way, the air intake area of the wind rotor 100 can be increased, which is beneficial to increase the air output of the wind rotor 100 .

In this embodiment, the first blades 30 are evenly 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 angle between any two adjacent first blades 30 is equal, which can facilitate the manufacture of the wind wheel 100, It is also possible to make the first blade 30 generate an airflow with a uniform speed in the circumferential direction, ensure that the airflow generated by the first blade 30 and the second blade 40 can diffuse after converging, thereby increasing the blowing area of the wind wheel 100 .

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

In this way, the manufacturing of the wind rotor 100 is facilitated, and the density of the airflow generated by the wind rotor 100 is made uniform, which is beneficial to the gas flow.

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

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

In this embodiment, the angle of attack of the first blade 30 is greater than the angle of attack of the second blade 40 .

In this way, the wind wheel 100 has better aerodynamic performance, which improves the efficiency of the wind wheel 100, and makes the wind wheel 100 of this embodiment generate more air volume at the same speed as compared with the traditional wind wheel. big.

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

Since the airfoil blades have better aerodynamic performance, the aerodynamic performance of each first blade 30 can be improved, and the first blade 30 has a greater influence on the overall airflow of the wind rotor 100, which can improve the aerodynamic performance of the wind rotor 100 and reduce the The power loss of the wind wheel 100 is reduced, saving energy (such as electric energy).

Specifically, the structures of the plurality of first blades 30 are the same, that is, the overall structure of each first blade 30 is the same, which facilitates the manufacture of the wind wheel 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 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. In this way, the aerodynamic performance of the wind wheel 100 can be further improved.

In addition, the airfoil blade is designed with the wing of a flying bird as the bionic object. Specifically, in one example, the first blade 30 can be designed as a secondary flight feather, and the second blade 40 can be designed as a primary flight feather, so that two layers of blades with different shapes can be designed. The advantages are: 1 .The shape of the blade adopts bionic design, so that the blade has good aerodynamic performance, and the overall appearance after assembly; 2. The double-layer blade design can increase the sweeping area and increase the air volume; 3. The Chinese and foreign hub design of the double-layer blade improves Improve the strength of the blade and prolong the working life.

In this embodiment, the ratio of the total area ΣS1 of the plurality of first blades 30 to the sum of the areas of the gaps ΣS1' between two adjacent first blades 30 is greater than 1 and less than 3.

That is, 1<ΣS1/ΣS1'<3. According to the experimental test, when ΣS1/ΣS1' is greater than 1 and less than 3, the first blade 30 has better aerodynamic performance, the air volume of the wind wheel 100 is larger, and the blowing area is larger.

In this embodiment, the ratio of the total area ΣS2 of the plurality of second blades 40 to the sum of the areas of the gaps ΣS2' between two adjacent second blades 40 is greater than 1 and less than 4.

That is, 1<ΣS2/ΣS2'<4. According to the experimental test, when ΣS2/ΣS2' is greater than 1 and less than 4, the aerodynamic performance of the wind rotor 100 can be further improved, so that the wind rotor 100 can blow more air and have a wider blowing area.

In this embodiment, the ratio ΣS1/ΣS1' of the total area ΣS1 of the plurality of first blades 30 to the sum ΣS1' of the area of the gap between two adjacent first blades 30 is smaller than the total area of the plurality of second blades 40. The ratio ΣS2/ΣS2' of the area ΣS2 to the sum ΣS2' of the areas of the gaps between two adjacent second blades 40.

That is, ΣS1/ΣS1'<ΣS2/ΣS2'. It can be seen from this that the distribution of the first blades 30 along the circumferential direction of the first hub 10 is sparser than that of the second blades 40 along the circumferential direction of the second hub 20 . In this way, sufficient air intake of the wind rotor 100 can be ensured to meet the demand for a large air volume of the wind rotor 100 .

Specifically, in this embodiment, the number of first blades 30 is seven, and the number of second blades 40 is nine.

In other embodiments, the specific numbers of the first blades and the second blades can be determined according to actual conditions. In such other embodiments, preferably, 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 total area of the plurality of second blades The ratio of the area to the sum of the areas of the gap between two adjacent second blades.

It should be noted that the total area ΣS1 of the plurality of first blades 30, the area S1' of the gap between two adjacent first blades 30, the total area ΣS2 of the plurality of second blades 40, and the gap between two adjacent first blades 30 The area S2' of the gap between the second blades 40 is the area measured after the forward projection of the wind rotor 100. The view of the forward projection of the wind rotor 100 is the view of the wind rotor 100 in FIG. 1 .

Wherein, the area S1' of the gap between two adjacent first blades 30 is the contour line of the two adjacent first blades 30, the contour line of the first hub 10 and the contour line of the first hub 10 after the forward projection of the wind wheel 100. The area of the figure enclosed by the contour lines of the two hubs 20.

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

The total area ΣS1 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 forward projection of the wind wheel 100 .

The area S2' of the gap between two adjacent second blades 40 is the outline of the two adjacent second blades 40 after the forward projection of the wind wheel 100, the outline of the second hub 20 and the second blade 40 The area of the figure enclosed by the extension line of the outline of the outer edge (as shown by the dotted line in Figure 1).

In this embodiment, preferably, the wind wheel 100 is integrally formed.

Specifically, the material of the wind wheel 100 may be plastic, and then the structure of the wind wheel 100 is formed by an injection molding process.

In this way, the processing technology of the wind wheel 100 is simplified, the manufacturing cost of the wind wheel 100 is reduced, and the strength of the first blade 30 and the second blade 40 can be improved so that the first blade 30 and the second blade 40 are not easy to be damaged.

A household appliance according to an embodiment of the present invention includes the above-mentioned wind wheel 100 .

Since the above-mentioned wind wheel 100 is applied to the household appliance in this embodiment, the blowing area of the household appliance is larger during use, which can meet the needs of users.

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

In the description of this specification, reference to the terms "one embodiment", "some embodiments", "exemplary embodiments", "example", "specific examples", or "some examples" etc. A specific feature, structure, material, or characteristic described in an embodiment or an example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the invention is defined by the claims and their equivalents.

Claims (12)

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.

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