TW201410990A - Double layer fan blade structure for fan - Google Patents

Abstract

A double layer fan blade structure for fan, which comprises a plurality of inner fan blades having a guiding hole, respectively, so as to make wind energy driven by the inner fan blades more stable, and the wind energy will not affected by wind produced by outer fan blades, thus forming stable wind and avoiding causing noises.

Description

Double-layer fan blade structure for fans

The invention provides a double-layer fan blade structure, in particular to a fan which is suitable for a fan and is provided with a flow guiding unit on the inner blade to reduce fan noise.

Fans are one of the most necessary items for human life. When consumers choose fans, in addition to considering the amount of airflow, the noise level of the fan during operation is undoubtedly also very important for consumers. factor.

The conventional fan is mainly composed of a plurality of blades extending outward from the periphery of a motor connecting portion located at the center. Since the size of the fan blade directly affects the air volume of the fan, the operator will increase the size of the fan blade as much as possible. Large, in order to increase the fan's air output; but inevitably, when the fan blade is larger, the noise caused by the vibration in operation will also increase. Therefore, how to balance the air volume and noise has long been annoying for the fan industry. The problem.

In order to overcome the above problems, a fan with a double-layer fan blade has been introduced on the market, such as the "Ignition for Electric Fan" of China Announcement No. M428258 and the "New Structure of Fan Blade Improvement" of China Announcement No. 534232 An impeller structure having a double-layered blade is disclosed. As shown in FIG. 1, the impeller includes a joint portion 11, a set of a circulation portion 12 disposed at the joint portion 11, and a ring portion disposed at the joint portion 11 and the circulation. Multiple inner leaves of the 12 The sheet 13 and the outer blade 14 disposed on the outer ring wall surface of the circulation portion 12; the blade of the fan is divided into the inner blade 13 and the outer blade 14 to reduce the area of the individual blade, thereby reducing the burden on the power device of the blade and avoiding the cause Noise is generated by vibration during operation; and the total amount of air is maintained by increasing the total number of blades.

It should be noted that, as shown in Fig. 2, in conjunction with Fig. 1, the creator of the present invention found that the wind driven by the inner blade 13 is blown by the wind driven by the inner blade 13 of the fan and the wind driven by the outer blade 14. The wind is extremely unstable, so that the wind driven by the outer blade 14 is easily screwed inward, and the wind driven by the inner blade 13 is wind-cut to form a turbulent flow; thus, the wind that is smoothed by the original is not only messy, The user is prone to discomfort due to the turbulent wind, and the blades of the fan may also vibrate accordingly, and the two winds cancel each other out, making the efficiency of the fan worse, and most importantly, the wind cut caused by the interference of the two winds. It will also cause annoying noise problems, and the creators of this case are committed to solving the above problems.

In view of this, the creator conceived and studied more deeply, and finally created an impeller structure improvement with double-layer blades.

The invention provides a double-layer blade structure suitable for a fan, the main purpose of which is to improve the conventional double-layer blade structure so as to avoid the wind driven by the outer blade and the wind driven by the inner blade without affecting the air volume. Interfere with each other generates noise.

In order to achieve the foregoing objective, the present invention provides a double-layer blade structure suitable for a fan, comprising: a joint portion, which is provided for the object; a plurality of first blades are disposed at one end around the periphery of the joint portion, and At least one flow guiding unit is disposed on the leaf surface of the first blade; a set of rings has an inner wall surface and an outer wall surface, and the inner wall surface ring is disposed at the other end of each of the first blades; and the plurality The second blade, each of the second blades is disposed on the outer wall surface.

The present invention makes the wind energy driven by the first blade more stable by the flow guiding unit disposed on the first blade, and does not interfere with the wind driven by the second blade, thereby forming two stable winds. To avoid noise.

The present invention has been described in connection with the preferred embodiments of the present invention in accordance with the accompanying drawings.

Before the present invention is described in detail, it is noted that in the following description, similar elements are denoted by the same reference numerals.

In order to enable your review committee to have a better understanding and understanding of the purpose, features and effects of the present invention, please refer to the following [detailed description of the drawings] as follows: The present invention is applicable to the double-layer fan blade structure of the fan. A preferred embodiment, as shown in FIGS. 3 to 5, includes: a joint portion 2, and a plurality of first leaf blades 3. A set of ring 4 and a plurality of second blades 5, wherein: the joint portion 2 is provided with an object member, and the center of the joint portion 2 has a shaft hole 21 for the shaft center 711 of the fan motor 71 to pass through, and thereby The first blade 3 has a curved surface and has two sides 31 and a long side 32 and a short side 33 connecting the two sides 31. The fan blade 3 is surrounded by the short side 33 and is equally affixed to the periphery of the joint portion 2, and a guide hole is formed along the contour of the first blade 3 on the leaf surface of each of the first blades 3 As the flow guiding unit 34, the wind energy driven by the first blade 3 is more stable; the set ring 4 has an inner wall surface 41 and an outer wall surface 42, and the assembled ring 4 has the inner wall surface 41 Surrounding the long side 32 of each of the first blades 3; and each of the second blades 5, each of the second blades 5 is circumferentially and equally fixed to the outer wall surface 42; The preferred embodiment of the creation has six first blades 3 and nine second blades 5, and the number of the first blades 3 and the second blades 5 may also be other numbers that do not affect the normal operation of the fan 70. .

The above description is the main components of the embodiment of the present invention and their configuration description.

As for the usage and function of the present embodiment, please refer to the third to fifth figures, and the first fan blade 3 is driven by the flow guiding unit 34 which is added to the first blade 3 by the present invention. The wind is more stable when it flows. It is not easily interfered by the wind driven by the second blade 5, and forms two stable winds inside and outside, which are blown away from the fan 70, and can be avoided in addition to allowing the user to feel smooth wind. Forming a wind cut, thereby reducing noise generation.

In addition, since the present invention creates the flow guiding unit 34 on the first blade 3, the weight of the integral fan 70 is reduced, and the fan motor 71 can drive the fan 70 to operate less without power, thereby saving material and In addition, since the flow guiding unit 34 is a hole-like structure opened in the inner blade 3 and is opened in the inner blade 3, the weight of the fan 70 is not reduced. The structural strength of the fan 70 is affected, whereby the fan 70 is less likely to generate vibration during operation, and has an effect of stabilizing and avoiding noise.

It is worth mentioning that the appearance of the flow guiding unit 34 can be slightly different for the manufacturing cost considerations or the actual needs of the user. For example, please refer to FIG. In one embodiment, the number of the flow guiding units 34B disposed on the first blade 3B is two. By providing different numbers and the flow guiding units 34B disposed at different positions, different guiding effects can be provided, which is convenient for providing users. select.

From the above, it is known that the present invention is indeed in line with "industry availability", "novelty", and "progressiveness", and proposes a new type of patent application according to law, praying for review and early granting of patents.

"Knowledge Technology"

11‧‧‧Combination Department

12‧‧‧Circulation Department

13‧‧‧ inner blade

14‧‧‧Outer blade

"this invention"

2‧‧‧Combination Department

21‧‧‧Axis hole

3, 3B‧‧‧ first leaf

31‧‧‧ side

32‧‧‧Longside

33‧‧‧ Short side

34, 34B‧‧‧ diversion unit

4‧‧‧Set ring

41‧‧‧ inner wall

42‧‧‧ outer wall

5‧‧‧second leaf

70‧‧‧fan

71‧‧‧Fan motor

711‧‧‧Axis

Figure 1 is a perspective view of a conventional double-blade impeller structure.

Fig. 2 is a schematic view showing a fan having a double-layered blade in use.

Fig. 3 is a perspective view of the present embodiment.

Fig. 4 is an external view of the present embodiment mounted on a fan.

Figure 5 is a schematic view of the present embodiment in use.

Enemy 6 is a perspective view of another embodiment of the creation.

2‧‧‧Combination Department

21‧‧‧Axis hole

3‧‧‧First leaf

31‧‧‧ side

32‧‧‧Longside

33‧‧‧ Short side

34‧‧‧Guide unit

4‧‧‧Set ring

41‧‧‧ inner wall

42‧‧‧ outer wall

5‧‧‧second leaf

Claims (4)

A double-layer blade structure suitable for a fan, comprising: a joint portion, which is provided for the object; a plurality of first blades, which are disposed at one end around the periphery of the joint portion and at the leaf surface of each of the first blades Providing at least one flow guiding unit; a set of ring having an inner wall surface and an outer wall surface, wherein the inner wall surface is disposed at the other end of each of the first blades; and the plurality of second blades, each of the plurality Two blades are disposed around the outer wall surface. The double-layer blade structure applicable to a fan according to claim 1, wherein the number of the second blades is larger than the number of the first blades. A double-layer blade structure suitable for a fan as described in claim 1, wherein the flow guiding unit is disposed along a contour of the first blade. The double-layer blade structure applicable to the fan according to the first aspect of the invention, wherein the flow guiding unit is a guiding hole and is formed on the leaf surface of each of the first blades.