JP2021060040A - Fan and consumer electronics - Google Patents

Abstract

To provide a fan which has a large air blowing surface area to meet users' needs.SOLUTION: A fan 100 includes: a first hub 10; a second hub 20; first blades 30; and second blades 40. The first hub 10 and the second hub 20 are coaxially provided. The first hub 10 and the second hub 20 are fixedly connected to the first blades 30. The first blades 30 are arranged at intervals. The second blades 40 are fixed to an outer surface of the second hub 20. The second blades 40 are arranged at intervals. A total area of the first blades 30 is larger than a total area of the second blades 40.SELECTED DRAWING: Figure 1

Description

The present invention relates to the field of home appliances, and more particularly to fans and home appliances.

A fan having a conventional two-layer blade structure can concentrate the wind force and increase the air blowing distance of the fan. However, since the inner layer blade of the fan having the conventional two-layer blade structure is small, the influence on the entire air flow is small, and the fan's ventilation area is too small to meet the needs of the user.

The present invention provides fans and home appliances to solve at least one of the technical problems existing in the prior art.

The fan 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 and the second hub are coaxially provided. The first hub and the second hub are fixedly connected to the plurality of first blades. The plurality of first blades are arranged at intervals. The plurality of second blades are fixed to 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 larger than the total area of the plurality of second blades.

In the fan, since the total area of the first blade is larger than the total area of the second blade, the first blade has a great influence on the entire air flow of the fan, and the air flow from the first blade and the second blade. Can be merged and then diffused, so that the fan's airflow area can be increased and the user's needs can be met.

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

In certain embodiments, the plurality of first blades are arranged radially and spaced around the first hub.

In certain embodiments, the plurality of second blades are arranged radially and spaced around the first hub.

In certain embodiments, the first blades are evenly arranged along the circumferential direction of the first hub.

In certain embodiments, the second blades are evenly arranged along the circumferential direction of the second hub.

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

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

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

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

In certain embodiments, the ratio of the total area of the plurality of first blades to the sum of the areas of the gaps between the two adjacent first blades is that of the total area of the plurality of second blades. It is smaller than the ratio of the area of the gap between the two adjacent second blades to the sum of the areas.

In certain embodiments, the fan has an integrally molded structure.

The home electric appliance according to the embodiment of the present invention includes the fan.

Since the fan is used in the home electric appliance according to the present embodiment, the ventilation area when the home electric appliance is used becomes larger, and the needs of the user can be satisfied.

Some of the additional features and merits of the present invention are described in the following description, some are further clarified in the following description, or can be grasped through the practice of the present invention.

The above-mentioned and / or additional features and merits of the present invention will be clarified and easily understood in the process of explaining the embodiments combined with the drawings below.

It is a plan view of the fan which concerns on embodiment of this invention. It is the schematic of the operation principle of the fan which concerns on embodiment of this invention.

Hereinafter, embodiments of the present invention will be described in detail. Examples of said embodiments are shown in the drawings, but the same or similar reference numerals always represent the same or similar parts, or parts having the same or similar functions. The embodiments described below with reference to the drawings are exemplary and are used solely for the purpose of interpreting the invention and should not be understood as limiting the invention.

In the description of the present invention, "center", "vertical direction", "horizontal direction", "length", "width", "thickness", "top", "bottom", "front", "rear", "rear" Orientation or positional relationship indicated by terms such as "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" Is used to conveniently or briefly describe the present invention based on the orientation or positional relationship shown in the drawings, the designated device or part is in a particular orientation and is constructed in a particular orientation. It should not be understood as a limitation to the present invention as it is not directed or implied when manipulated. The terms "first" and "second" are used only to explain the purpose and either indicate or imply relative importance or imply the number of technical features shown. Do not understand when instructing. Thus, the features limited by the "first", "second" express or imply that they include one or more of the features. In the description of the present invention, "plurality" means two or more, unless there is a clear and specific limitation.

In the description of the present invention, the meanings of the terms "attachment", "connecting to each other", and "connecting" should be widely understood unless there are clear provisions and limitations. For example, a fixed connection, a detachable connection, or an integrated connection is also possible. It can be a mechanical connection, an electrical connection, or even communicate with each other. It is possible to connect directly, indirectly through an intermediate medium, communicate inside the two parts, or have an interaction relationship between the two parts. .. Those skilled in the art can understand the specific meanings of the above terms in the present invention depending on the specific circumstances.

In the present invention, unless otherwise specified and limited, the fact that the first feature is "above" or "below" the second feature includes direct contact between the first feature and the second feature. It may be included that the first feature and the second feature do not come into direct contact with each other but come into contact with each other through another feature between them. Further, the fact that the first feature is "above", "above" or "upper surface" of the second feature includes that the first feature is directly above and diagonally above the second feature, or simply the first. It only indicates that the horizontal height of one feature is higher than that of the second feature. The fact that the first feature is "below", "downward" or "bottom surface" of the second feature includes that the first feature is directly above and diagonally above the second feature, or simply the first feature. Only shows that the horizontal height of is lower than the second feature.

It is disclosed that different structures of the present invention are realized by providing many different embodiments or examples in the following contents. In order to simplify the description of the present invention, the members and arrangements of specific examples will be described below. Of course, these are merely examples and are not intended to limit the present invention. In addition, the present invention can duplicate numbers and / or alphabetic symbols in different examples. Such duplication is for simplification and clarity and by itself does not indicate a relationship between the various examples and / or arrangements considered. Although the present invention gives examples of various specific steps and materials, those skilled in the art can also consider the application of other steps and / or the use of other materials.

Referring to FIGS. 1 and 2, the fan 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. Includes 40 and.

The first hub 10 and the second hub 20 are provided coaxially. The first hub 10 and the second hub 20 are fixedly connected by a plurality of first blades 30. A plurality of first blades 30 are arranged at intervals. A plurality of second blades 40 are fixed to 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 larger than the total area ΣS2 of the plurality of second blades 40.

In the fan 100, since the total area of the first blade 30 of the fan 100 is larger than the total area of the second blade 40, the first blade 30 has a great influence on the entire air flow generated by the fan 100. Since the airflow from the blade 30 of 1 and the airflow from the second blade 40 can be merged and then diffused, the blowing area of the fan 100 can be increased to meet the needs of the user.

Further, since the airflows from the first blade 30 and the second blade 40 merge and then interact with each other, the vortex phenomenon due to the centrifugal force of the fan 100 can be reduced, and the wind after diffusion is natural. Get closer to the wind and enhance the user experience.

Table 1 is obtained by comparing the parameters of the fan 100 according to the embodiment of the present invention detected by the inventor with the parameters of the conventional fan under the same conditions, and comparing the air volume and noise of both when the rotation speeds are close. did.

Table 2 was obtained by comparing the noises of both when the air volume was the same.

As seen from Table 1, when the rotation speeds are close, the air volume of the fan 100 according to the present embodiment is remarkably larger than the air volume of the conventional fan, but the difference in noise is small and the influence on the user is small.

As can be seen from Table 2, when the air volume is the same, the noise of the fan 100 according to the present embodiment is significantly lower than that of the conventional fan, and the rotation speed and power are also significantly lower than those of the conventional fan, thus saving the amount of electricity. be able to.

It should be understood that in this embodiment, the first hub 10 is an internal hub and the second hub 20 is an external hub. The first blade 30 is an internal blade and the second blade 40 is an external blade.

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

Specifically, the inner edge 32 of the plurality of first blades 30 is connected to the outer wall 12 of the first hub 10. The outer edge 34 of the plurality of first blades 30 is connected to the inner surface 24 of the second hub 20.

Since the first hub 10 and the second hub 20 are directly connected via the first blade 30, the structural complexity of the fan 100 is reduced, and the fan 100 can be easily manufactured.

In this embodiment, a plurality of first blades 30 are arranged radially and spaced apart from the first hub 10.

As a result, the first hub 10 and the second hub 20 can be easily connected to the first blade 30, and the strength of the fan 100 can be improved.

In this embodiment, a plurality of second blades 40 are arranged radially and spaced apart from the first hub 10.

As a result, the intake area of the fan 100 can be increased, and the amount of air blown by the fan 100 can be easily increased.

In this embodiment, the first blades 30 are evenly arranged along the circumferential direction of the first hub 10.

In short, the circumferential distance between any two adjacent first blades 30 is equal, or the deflection angle between any two adjacent first blades 30 is equal. As a result, the fan 100 can be easily manufactured, the first blade 30 can generate an air flow having a uniform speed along the circumferential direction, and the air flow from the first blade 30 and the second blade 40 can be generated. Since it can be diffused after merging, the air blowing area of the fan 100 increases.

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

This makes it easier to manufacture the fan 100, makes the density of the air flow from the fan 100 uniform, and facilitates the flow of gas.

Further, both the first blade 30 and the second blade 40 are evenly arranged along the circumferential direction of the fan 100. The center of gravity of the mass of the fan 100 in the stationary state is located at the center of rotation of the fan 100. As a result, vibration when the fan 100 rotates can be reduced, and noise due to the rotation of the fan 100 can be reduced.

Specifically, the center hole 14 is provided in the first hub 10, the fan 100 is connected to the rotation shaft of the motor via the center hole 14, and the motor drives the rotation of the fan 100.

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

As a result, when the fan 100 has good aerodynamic performance, the efficiency of the fan 100 can be improved, and the fan 100 according to the present embodiment has the same rotation speed as that of the conventional fan, the fan 100 The amount of air generated becomes even larger.

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

Since the airfoil blade has good aerodynamic performance, the aerodynamic performance of each first blade 30 can be improved, and the first blade 30 has a large influence on the entire air flow of the fan 100, so that the aerodynamic performance of the fan 100 is large. Performance can be improved, the power loss of the fan 100 can be reduced, and energy (eg, electrical energy) can be saved.

Specifically, the structures of the plurality of first blades 30 are all the same, and in short, the overall structure of each of the first blades 30 is the same, so that the fan 100 can be easily manufactured.

Further, the first blade 30 is a twisted airfoil blade. Since the shape of the twisted blade and the flow pattern of the air flow match, the loss of the gas flow can be reduced and the efficiency of the fan 100 can be improved.

Preferably, the second blade 40 is an airfoil blade. As a result, the aerodynamic performance of the fan 100 can be further improved.

Further, the airfoil blade is designed, for example, for a bird's wing as a biomimetic target. Specifically, in one embodiment, the first blade 30 can be provided in the shape of the next-row feathers, and the second blade 40 can be provided in the shape of the first-row feathers. As a result, it is possible to provide two-layer blades having different appearances, which has the following merits. 1. 1. The appearance of the blade adopts a biomimetic design, so the blade has good aerodynamic performance and the appearance after assembly is beautiful. 2. Since the two-layer blade design is adopted, the wind blowing area can be increased and the air volume can be improved. 3. 3. The inner and outer hub design of the double-layer blade can improve the strength of the blade and extend its service life.

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

That is, 1 <ΣS1 / ΣS1 ′ <3. Through experiments, it was found that when ΣS1 / ΣS1'is larger than 1 and smaller than 3, the first blade 30 has good aerodynamic performance, the air volume of the fan 100 is large, and the blowing area is large.

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

That is, 1 <ΣS2 / ΣS2 ′ <4. Through experiments, it can be seen that when ΣS2 / ΣS2'is larger than 1 and smaller than 4, the aerodynamic performance of the fan 100 can be further improved, so that the amount of air blown by the fan 100 is large and the air blowing area is wider.

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

That is, ΣS1 / ΣS1'<ΣS2 / ΣS2'. As a result, the arrangement of the first blade 30 along the circumferential direction of the first hub 10 is sparser than the arrangement of the second blade 40 along the circumferential direction of the second hub 20. As a result, the intake amount of the fan 100 is sufficient, so that the needs for a large air volume of the fan 100 can be satisfied.

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

In other embodiments, the specific quantities of the first blade and the second blade can be determined depending on the actual situation. In other embodiments as well, the ratio of the total area of the plurality of first blades to the sum of the areas of the gaps between the two adjacent first blades is that of the total area of the plurality of second blades adjacent to each other. It is preferable to satisfy that the ratio of the area of the gap between the two second blades to the sum is smaller than the ratio.

The total area ΣS1 of the plurality of first blades 30, the area S1'of the gap between the two adjacent first blades 30, the total area ΣS2 of the plurality of second blades 40, and the two adjacent first blades 30. The area S2'of the gap between the second blades 40 is detected by the area of the fan 100 projected from the front, and the figure of the fan 100 projected from the front is a diagram of the fan 100 as shown in FIG. is there.

The area S1'of the gap between the two adjacent first blades 30 is the contour line of the two adjacent first blades 30 in the front-projected fan 100, the contour line of the first hub 10, and the first. It is the area of the figure surrounded by the outline of the hub 20 of 2.

For example, in FIG. 1, the area of the figure surrounded 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 the 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 of the first blades 30 in the front-projected fan 100.

The area S2'of the gap between the two adjacent second blades 40 is the contour line of the two adjacent second blades 40 in the front-projected fan 100, the contour line of the second hub 20, and the contour line. It is the area of the figure surrounded by the extension line (indicated by the dotted line in FIG. 1) of the outer edge contour line of the second blade 40.

In the present embodiment, preferably, the fan 100 has an integrally molded structure.

Specifically, the material of the fan 100 may be all plastic. Further, the structure of the fan 100 is formed by injection molding.

As a result, the processing process of the fan 100 is simplified, the manufacturing cost of the fan 100 is reduced, and the strength of the first blade 30 and the second blade 40 can be improved. Therefore, the first blade 30 and the first blade 30 and the first blade 40 can be improved. It is difficult to damage the blade 40 of 2.

The home electric appliance according to the embodiment of the present invention includes the fan 100.

Since the fan 100 is used in the home electric appliance according to the present embodiment, the ventilation area when the home electric appliance is used becomes large, and the needs of the user can be satisfied.

A home appliance is a home appliance that includes a fan, such as an electric fan, a heater, or an air conditioner.

In the description of the present invention, terms such as "one embodiment", "partial embodiment", "exemplary embodiment", "example", "concrete example", or "some examples". The description with reference to the above means that the specific features, configurations, materials or features described in combination with the embodiments or examples are included in at least one embodiment or example of the present invention. In the present specification, exemplary depictions of the above terms do not necessarily represent the same embodiment or example. Also, the specific features, configurations, materials or features described may be appropriately combined 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 make various changes, modifications, substitutions and modifications to these embodiments without departing from the principles and gist of the present invention. The scope of the present invention is limited by the claims and their equivalents.

The fan 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 and the second hub are coaxially provided. The first hub and the second hub are fixedly connected to the plurality of first blades. The plurality of first blades are arranged at intervals. The plurality of second blades are fixed to 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 larger than the total area of the plurality of second blades. The plurality of first blades generate a first air flow in the axial direction. The plurality of second blades generate a second airflow that joins the first airflow on the downstream side in the axial direction.

Claims (13)

The first hub and
A second hub coaxial with the first hub,
A plurality of first blades in which the first hub and the second hub are fixedly connected and arranged at intervals, and
A plurality of second blades fixed to the outer surface of the second hub and arranged at intervals,
Including
The total area of the plurality of first blades is larger than the total area of the plurality of second blades.
A fan characterized by that. The angle of attack of the first blade is larger than the angle of attack of the second blade.
The fan according to claim 1. The plurality of first blades are arranged radially and spaced around the first hub.
The fan according to claim 1 or 2. The plurality of second blades are arranged radially and spaced around the first hub.
The fan according to any one of claims 1 to 3. The first blades are evenly arranged along the circumferential direction of the first hub.
The fan according to claim 1 or 2. The second blades are evenly arranged along the circumferential direction of the second hub.
The fan according to claim 1 or 2. The first blade is an airfoil blade.
The fan according to any one of claims 1 to 6, characterized in that. The second blade is an airfoil blade.
The fan according to any one of claims 1 to 7. The ratio of the total area of the plurality of first blades to the sum of the areas of the gaps between the two adjacent first blades is greater than 1 and less than 3.
The fan according to any one of claims 1 to 8, wherein the fan. The ratio of the total area of the plurality of second blades to the sum of the areas of the gaps between the two adjacent second blades is greater than 1 and less than 4.
The fan according to any one of claims 1 to 9, wherein the fan. The ratio of the total area of the plurality of first blades to the sum of the areas of the gaps between the two adjacent first blades is that of the total area of the plurality of second blades Less than the ratio of the area of the gap between the second blades to the sum,
The fan according to any one of claims 1 to 10. The fan has an integrally molded structure.
The fan according to any one of claims 1 to 11. The fan according to any one of claims 1 to 12 is included.
Home appliances that are characterized by that.

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