Fan blade, fan and invisible fan light

Abstract

The present disclosure provides a fan blade, a fan and an invisible fan light, which belong to the field of electrical technology. The fan blade includes a connecting section, a first blowing section, a guide section and a second blowing section connected in sequence. One end of the connecting section away from the first blowing section is used to connect with the fan blade mounting component. The elevation angles of the first blowing section, the guide section and the second blowing section at the inner edge are respectively the first elevation angle, the second elevation angle and the third elevation angle, wherein the third elevation angle is greater than the first elevation angle and less than the second elevation angle. When the fan blade rotates, the first blowing section can gather the airflow, and a part of the gathered airflow is blown out obliquely downward, and the other part is guided to the second blowing section through the guide section. Since the third elevation angle of the second blowing section is greater than the first elevation angle of the first blowing section, under the action of the second blowing section, the other part of the airflow can be blown out obliquely downward at a larger angle, thereby increasing the blowing range of the fan.

Description

Technical Field

[0001] The present disclosure relates to the field of electrical appliance technologies, and particularly to a fan blade, a fan, and an invisible fan light. Background Art

[0002] An invisible fan light is a special fan that integrates a ceiling fan and a chandelier, having both the lighting function of a lamp and the blowing function of a ceiling fan.

[0003] In the related art, the blowing range of the invisible fan light is small and concentrated, and the wind cannot be sent to the surrounding space. Summary of the Invention

[0004] The present disclosure provides a fan blade, a fan, and an invisible fan light, which can solve the technical problems existing in the related art. The technical solutions of the fan blade, the fan, and the invisible fan light are as follows:

[0005] In a first aspect, a fan blade is provided. The fan blade includes a connecting section, a first blowing section, a guiding section, and a second blowing section that are connected in sequence;

[0006] One end of the connecting section away from the first blowing section is used for connecting with a fan blade mounting component;

[0007] The elevation angles of the first blowing section, the guiding section, and the second blowing section at the inner edge are a first elevation angle, a second elevation angle, and a third elevation angle respectively, where the third elevation angle is greater than the first elevation angle and less than the second elevation angle.

[0008] In a possible implementation manner, the first elevation angle is greater than 8° and less than 12°, the second elevation angle is greater than 42° and less than 52°, and the third elevation angle is greater than 25° and less than 40°.

[0009] In a possible implementation manner, the second elevation angle is 3.5 to 6.5 times the first elevation angle, and the second elevation angle is 1.05 to 2.1 times the third elevation angle.

[0010] In a possible implementation manner, the angle by which the guiding section is offset relative to the first blowing section gradually decreases along the direction from the end of the guiding section at the inner edge to the end of the guiding section at the outer edge.

[0011] In a possible implementation manner, the width of the guiding section gradually decreases along the direction from the end of the guiding section at the inner edge to the end of the guiding section at the outer edge.

[0012] In a possible implementation manner, the connecting section includes an installation section and a wind locking section that are connected;

[0013] The installation section is used for connecting with the fan blade mounting component;

[0014] The air lock section is located between the installation section and the first blowing section, and the air lock section is used to block the airflow at the first blowing section from flowing towards the installation section.

[0015] In a possible implementation, the inner edge of the air lock section includes a connected first protruding edge and a first concave edge, the first protruding edge is connected to the first blowing section, and the first concave edge is connected to the installation section;

[0016] The outer edge of the air lock section includes a connected second protruding edge and a second concave edge, the second protruding edge is connected to the installation section, and the second concave edge is connected to the first blowing section.

[0017] In a possible implementation, the projection of the inner edge of the air lock section on the horizontal plane is in the shape of a first S, the projection of the outer edge of the air lock section on the horizontal plane is in the shape of a second S, and the orientations of the first S and the second S are the same.

[0018] In a possible implementation, the elevation angle of the air lock section is greater than the elevation angle of the first blowing section.

[0019] In a possible implementation, the first blowing section has vibration filtering grooves.

[0020] In a possible implementation, the vibration filtering grooves are in the shape of an S, and the first end of the vibration filtering grooves is close to the inner edge of the first blowing section, and the second end is close to the outer edge of the first blowing section.

[0021] In a possible implementation, the first end of the vibration filtering grooves is close to the connection section, and the second end of the vibration filtering grooves is close to the diversion section.

[0022] In a possible implementation, the distance from the first end to the inner edge of the first blowing section is greater than the distance from the second end to the outer edge of the first blowing section.

[0023] In a possible implementation, the distance from the first end to the inner edge of the first blowing section is 1.5 to 2.5 times the distance from the second end to the outer edge of the first blowing section.

[0024] In a possible implementation, the distance from the first end to the inner edge of the first blowing section is 1.7 to 2.3 times the distance from the second end to the outer edge of the first blowing section.

[0025] In a possible implementation, the distance from the first end to the inner edge of the first blowing section is 2 times the distance from the second end to the outer edge of the first blowing section.

[0026] In a possible implementation, the vibration filtering groove is located on the side where the first blowing section blows out air.

[0027] In a second aspect, a fan is provided, and the fan has a fan blade as described in any one of the first aspects.

[0028] In a third aspect, a concealed fan light is provided, and the concealed fan light has a fan blade as described in any one of the first aspects.

[0029] The technical solutions provided by the present disclosure at least include the following beneficial effects:

[0030] The present disclosure provides a fan blade, which includes a connecting section, a first blowing section, a guiding section, and a second blowing section that are connected in sequence. The elevation angles of the first blowing section, the guiding section, and the second blowing section at the inner edge are the first elevation angle, the second elevation angle, and the third elevation angle respectively. The third elevation angle is greater than the first elevation angle and less than the second elevation angle.

[0031] When the fan blade rotates, the first blowing section can converge the air flow. A part of the converged air flow is blown obliquely downward, and the other part is guided by the guiding section to the second blowing section. Since the third elevation angle of the second blowing section is greater than the first elevation angle of the first blowing section, under the action of the second blowing section, the other part of the air flow can be blown obliquely downward at a larger angle, thereby increasing the blowing range of the fan.

[0032] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings herein are incorporated into the specification and constitute a part of this specification, showing embodiments consistent with the present disclosure and used together with the specification to explain the principles of the present disclosure. In the drawings:

[0034] Figure 1 is a schematic diagram of a fan blade shown in an embodiment of the present disclosure;

[0035] Figure 2 is a schematic diagram of a fan blade shown in an embodiment of the present disclosure;

[0036] Figure 3 is a schematic diagram of a fan blade shown in an embodiment of the present disclosure;

[0037] Figure 4 is a schematic diagram of a fan blade shown in an embodiment of the present disclosure;

[0038] Figure 5 is a partial schematic diagram of a fan blade shown in an embodiment of the present disclosure;

[0039] Figure 6It is a partial schematic diagram of a fan blade shown in an embodiment of the present disclosure;

[0040] Figure 7 It is a schematic diagram of a fan blade shown in an embodiment of the present disclosure;

[0041] Figure 8 It is a schematic diagram of a fan blade shown in an embodiment of the present disclosure;

[0042] Figure 9 It is a partial schematic diagram of a fan blade shown in an embodiment of the present disclosure;

[0043] Figure 10 It is a schematic diagram of a fan blade shown in an embodiment of the present disclosure;

[0044] Figure 11 It is a schematic diagram of a fan shown in an embodiment of the present disclosure;

[0045] Figure 12 It is a comparison diagram of the wind fields of the fan provided by the present disclosure and the fan in the related art shown in an embodiment of the present disclosure;

[0046] Figure 13 It is a comparison diagram of the wind noises of the fan provided by the present disclosure and the fan in the related art shown in an embodiment of the present disclosure;

[0047] Figure 14 It is a comparison diagram of the air volumes of the fan provided by the present disclosure and the fan in the related art shown in an embodiment of the present disclosure;

[0048] Figure 15 It is a comparison diagram of the wind speeds of the fan provided by the present disclosure and the fan in the related art shown in an embodiment of the present disclosure;

[0049] Figure 16 It is a schematic diagram of a fan shown in an embodiment of the present disclosure.

[0050] Legend Explanation

[0051] 01. Fan blade, 02. Fan blade mounting component, 03. Suspension rod, 04. Lamp;

[0052] 1. Connection section, 11. Installation section, 12. Air-lock section, 12a. First S-shaped, 12b. Second S-shaped, 121. First protruding edge, 122. First recessed edge, 123. Second protruding edge, 124. Second recessed edge;

[0053] 2. First blowing section, 20. Vibration filtering groove, 201. First end, 202. Second end;

[0054] 3. Flow guiding section;

[0055] 4. Second blowing section;

[0056] a, inner edge; b, outer edge

[0057] A, first elevation angle; B, second elevation angle; C, third elevation angle; D, fourth elevation angle

[0058] Through the above-mentioned drawings, specific embodiments of the present disclosure have been shown, and there will be more detailed descriptions hereinafter. These drawings and textual descriptions are not intended to limit the scope of the concept of the present disclosure in any way, but to illustrate the concept of the present disclosure to those skilled in the art by referring to specific embodiments Detailed implementation manners

[0059] To make the objectives, technical solutions, and advantages of the present disclosure clearer, the following will further describe the embodiments of the present disclosure in detail with reference to the drawings

[0060] An embodiment of the present disclosure provides a fan blade, as Figure 1-4 shown. The fan blade includes a connecting section 1, a first blowing section 2, a guiding section 3, and a second blowing section 4 that are connected in sequence. One end of the connecting section 1 away from the first blowing section 2 is used to connect with a fan blade installation component. The elevation angles of the first blowing section 2, the guiding section 3, and the second blowing section 4 at the inner edge a are the first elevation angle A, the second elevation angle B, and the third elevation angle C respectively. The third elevation angle C is greater than the first elevation angle A and less than the second elevation angle B

[0061] Among them, the type of the fan to which the fan blade of the present disclosure is applied is not limited in the embodiments of the present disclosure. In some examples, the fan blade is applied in a ceiling fan, and the ceiling fan can be an invisible fan, for example, an invisible fan light

[0062] The inner edge a refers to the edge of the fan blade that cuts the wind, and the outer edge b is opposite to the inner edge a. The elevation angles of the first blowing section 2, the guiding section 3, and the second blowing section 4 at the inner edge a may refer to the angles between the inner edges of the first blowing section 2, the guiding section 3, and the second blowing section 4 and the horizontal plane. It can be understood that the inner edges of the first blowing section 2, the guiding section 3, and the second blowing section 4 may not be a straight line. Therefore, the specific degrees of the first elevation angle A, the second elevation angle B, and the third elevation angle C at different positions of the inner edge are also different. Therefore, the degrees of the first elevation angle A, the second elevation angle B, and the third elevation angle C can be a point value or a range value, but all need to satisfy the relationship that the third elevation angle C is greater than the first elevation angle A and less than the second elevation angle B

[0063] The first blowing section 2 and the second blowing section 4 are used for blowing. Moreover, since the third elevation angle C of the second blowing section 4 at the inner edge a is greater than the first elevation angle A of the first blowing section 2 at the inner edge a, the wind blown out from the second blowing section 4 is closer to horizontal, while the wind blown out from the first blowing section 2 is closer to vertical. Therefore, the second blowing section 4 can effectively enhance the blowing range of the fan blade. The guiding section 3 is used to guide the air flow from the first blowing section 2 to the second blowing section 4.

[0064] When the fan blade provided in the embodiment of the present disclosure rotates, the first blowing section 2 can gather the air flow. A part of the gathered air flow is blown obliquely downward, and the other part is guided by the guiding section 3 to the second blowing section 4. Since the third elevation angle C of the second blowing section 4 is greater than the first elevation angle A of the first blowing section 2, under the action of the second blowing section 4, the other part of the air flow can be blown obliquely downward at a larger angle, thereby improving the blowing range of the fan.

[0065] It should be added that the fan blade in the related art can be understood as replacing all of the guiding section 3 and the second blowing section 4 in the fan blade provided by the present disclosure with the first blowing section 2. That is, the elevation angle of the inner edge a of the fan blade in the related art is small and unchanged, which makes the blowing range of the fan blade in the related art very small.

[0066] The embodiment of the present disclosure does not limit the specific degrees of the first elevation angle A, the second elevation angle B, and the third elevation angle C. In some examples, as Figure 2 and Figure 4 shown, the first elevation angle A is greater than 8° and less than 12°, the second elevation angle B is greater than 42° and less than 52°, and the third elevation angle C is greater than 25° and less than 40°.

[0067] Exemplarily, the first elevation angle A is 10°, the second elevation angle B is 47°, and the third elevation angle C is 28°.

[0068] The embodiment of the present disclosure does not limit the proportional relationship among the first elevation angle A, the second elevation angle B, and the third elevation angle C. In some examples, the second elevation angle B is 3.5 to 6.5 times the first elevation angle A, and the second elevation angle B is 1.05 to 2.1 times the third elevation angle C.

[0069] Exemplarily, the second elevation angle B is 4.7 times the first elevation angle A, and the second elevation angle B is 1.7 times the third elevation angle C.

[0070] The technical solution provided by the embodiment of the present disclosure, by setting the first elevation angle A, the second elevation angle B, and the third elevation angle C within the above ranges and the above proportional relationship, through experiments, can more effectively enhance the blowing range of the fan.

[0071] Since the inner edge a of the fan blade is the edge that cuts the wind, the air volume at the inner edge a of the fan blade is the largest. Therefore, the diversion section 3 requires a strong diversion ability at the inner edge a to divert the large air volume to the second blowing section 4. The air volume at the outer edge b of the fan blade is smaller, so the diversion section 3 can divert the air flow to the second blowing section 4 with a weak diversion ability at the outer edge b. Therefore, the diversion ability of the diversion section 3 can gradually decrease along the direction from the end of the diversion section 3 at the inner edge a to the end of the diversion section 3 at the outer edge b.

[0072] In some examples, the offset angle of the diversion section 3 relative to the first blowing section 2 gradually decreases along the direction from the end of the diversion section 3 at the inner edge a (as Figure 5 shown) to the end of the diversion section 3 at the outer edge b (as Figure 6 shown). In this way, the diversion ability of the diversion section 3 gradually decreases along the direction from the end of the diversion section 3 at the inner edge a to the end of the diversion section 3 at the outer edge b. It is measured by experiments that this setting method makes the overall diversion effect of the diversion section 3 better and the blowing range of the fan blade wider.

[0073] Exemplarily, as Figure 6 shown, the outer edge of the diversion section 3 is flush with the outer edges of the first blowing section 2 and the second blowing section 4.

[0074] In some examples, as Figure 7 shown, the width of the diversion section 3 gradually decreases along the direction from the end of the diversion section 3 at the inner edge a to the end of the diversion section 3 at the outer edge b. In this way, the diversion ability of the diversion section 3 gradually decreases along the direction from the end of the diversion section 3 at the inner edge a to the end of the diversion section 3 at the outer edge b. It is measured by experiments that this setting method makes the overall diversion effect of the diversion section 3 better and the blowing of the fan blade wider.

[0075] During the rotation of the fan blade, mainly the first blowing section 2 and the second blowing section 4 play the blowing effect. Therefore, the utilization rate of the air flow at the first blowing section 2 and the second blowing section 4 is relatively high, while the utilization rate of the air flow at the connecting section 1 is very low.

[0076] In order to improve the utilization rate of the air flow, in some examples, as Figure 8 shown, the connecting section 1 includes a connected installation section 11 and a wind locking section 12. The installation section 11 is used to connect with the fan blade installation component. The wind locking section 12 is located between the installation section 11 and the first blowing section 2, and the wind locking section 12 is used to block the air flow at the first blowing section 2 from flowing to the installation section 11.

[0077] In this way, the air flow at the first blowing section 2 is not easily introduced into the connecting section 1. Thus, the possibility of air flow loss in the connecting section 1 is reduced, the utilization rate of the air flow is increased, and the efficiency of the fan blade blowing is improved. Moreover, the air lock section 12 can also cut the air flow into the guiding section 3.

[0078] In some examples, as Figure 8 shown, the projection of the inner edge of the air lock section 12 on the horizontal plane forms a first S shape 12a, and the projection of the outer edge of the air lock section 12 on the horizontal plane forms a second S shape 12b, and the first S shape 12a and the second S shape 12b face the same direction.

[0079] Among them, the fact that the first S shape 12a and the second S shape 12b face the same direction can also be understood as that the postures of the first S shape 12a and the second S shape 12b are the same, rather than being symmetrical.

[0080] In this way, when the air flow at the first blowing section 2 flows into the connecting section 1, it needs to follow an S-shaped path to flow into the installation section 11, increasing the difficulty of the air flow flowing into the installation section 11. Generally speaking, the air flow is blocked when it has traveled half of the S-shaped path.

[0081] In some examples, as Figure 8 shown, the inner edge of the air lock section 12 includes a connected first protruding edge 121 and a first concave edge 122 (the first protruding edge 121 and the first concave edge 122 form the first S shape 12a), the first protruding edge 121 is connected to the first blowing section 2, and the first concave edge 122 is connected to the installation section 11. The outer edge of the air lock section 12 includes a connected second protruding edge 123 and a second concave edge 124 (the second protruding edge 123 and the second concave edge 124 form the second S shape 12b), the second protruding edge 123 is connected to the installation section 11, and the second concave edge 124 is connected to the first blowing section 2.

[0082] In some examples, as Figure 9 shown, the elevation angle of the air lock section 12 is greater than the elevation angle of the first blowing section 2. In this way, when the air flow at the first blowing section 2 flows towards the installation section 11, it will be blocked by the air lock section 12.

[0083] Among them, the fact that the elevation angle of the air lock section 12 is greater than the elevation angle of the first blowing section 2 means that the elevation angles of all parts of the air lock section 12 are greater than the elevation angles of the corresponding parts of the first blowing section 2. As Figure 9 shown, the fourth elevation angle D of the air lock section 12 at the inner edge is greater than the first elevation angle A of the first blowing section 2 at the inner edge.

[0084] Of course, in some other examples, as Figure 7 shown, the connecting section 1 may not include the air lock section 12, but only include the installation section 11, and the installation section 11 is directly connected to the first blowing section 2.

[0085] When the fan blade cuts the air flow, it will encounter wind resistance. Under the action of the wind resistance, the fan blade will vibrate continuously, and the vibration of the fan blade will be transmitted to the fan blade mounting component, causing the whole fan to vibrate. The vibration of the whole fan will resonate with the ceiling, resulting in a buzzing wind noise and reducing the user experience.

[0086] In order to reduce the wind noise, in some examples, as Figure 10 shown, the fan blade has a vibration filtering groove 20.

[0087] Among them, the vibration filtering groove 20 is a groove opened on the fan blade. The vibration filtering groove 20 weakens the rigidity of the fan blade and enhances the elasticity of the fan blade. Thus, when the fan blade vibrates, it will only vibrate by itself, and the vibration is difficult to be transmitted to the fan blade mounting component, making the vibration of the whole fan smaller and reducing the wind noise generated by the rotation of the fan.

[0088] The present disclosure embodiment does not limit the position of the vibration filtering groove 20. In some examples, as Figure 10 shown, the first blowing section 2 has a vibration filtering groove 20.

[0089] Among them, the vibration filtering groove 20 can be located on the air outlet side of the first blowing section 2 (as Figure 10 shown), or can be located on the windward side of the first blowing section 2. The present disclosure embodiment does not limit this.

[0090] The present disclosure embodiment does not limit the shape of the vibration filtering groove 20. In some examples, as Figure 10 shown, the vibration filtering groove 20 is in an S shape, and the first end 201 of the vibration filtering groove 20 is close to the inner edge a of the first blowing section 2, and the second end 202 is close to the outer edge b of the first blowing section 2.

[0091] In some examples, as Figure 10 shown, the first end 201 of the vibration filtering groove 20 is close to the connecting section 1, and the second end 202 of the vibration filtering groove 20 is close to the guiding section 3. In this way, the vibration filtering groove 20 can almost enhance the elasticity of the whole first blowing section 2.

[0092] In order to achieve a better vibration filtering effect, through various researches, it is found that when the first blowing section 2 vibrates, the part of the first blowing section 2 closer to the guiding section 3 has a larger vibration amplitude. Therefore, in some examples, as Figure 10 shown, the distance L1 from the first end 201 to the inner edge a of the first blowing section 2 is greater than the distance L2 from the second end 202 to the outer edge b of the first blowing section 2.

[0093] In this way, the elasticity of the part of the first blowing section 2 closer to the guiding section 3 is enhanced more, while the elasticity of the part of the first blowing section 2 closer to the connecting section 1 is enhanced less, making the overall noise reduction effect better.

[0094] In some examples, asFigure 10 As shown, the distance L1 from the first end 201 to the inner edge a of the first blowing section 2 is 1.5 to 2.5 times the distance L2 from the second end 202 to the outer edge b of the first blowing section 2.

[0095] In some examples, as Figure 10 shown, the distance L1 from the first end 201 to the inner edge a of the first blowing section 2 is 1.7 to 2.3 times the distance L2 from the second end 202 to the outer edge b of the first blowing section 2.

[0096] Exemplarily, L1 is twice L2. For example, L1 can be 18 mm and L2 can be 9 mm.

[0097] The technical solution provided by the embodiments of the present disclosure can more effectively reduce the wind noise generated when the fan rotates by setting L1 and L2 to the above proportional relationship.

[0098] In some other examples, it can also be that the first end 201 of the vibration filtering groove 20 is close to the diversion section 3, and the second end 202 of the vibration filtering groove 20 is close to the connection section 1.

[0099] The embodiments of the present disclosure also provide a fan, as Figure 11 shown, the fan has the above-mentioned fan blades.

[0100] In some examples, as Figure 11 shown, the fan is a ceiling fan, including a suspension rod 03, a fan blade mounting member 02 and a plurality of fan blades 01. One end of the suspension rod 03 is used to connect to the ceiling, and the other end is connected to the fan blade mounting member 02. The plurality of fan blades 01 are all connected to the fan blade mounting member 02. The embodiments of the present disclosure do not limit the number of the fan blades 01. Exemplarily, the number of the fan blades 01 is four or three, etc.

[0101] In some examples, the ceiling fan is an invisible ceiling fan. When the invisible ceiling fan is stationary, the plurality of fan blades 01 are retracted together (as Figure 11 shown), and when the invisible ceiling fan works, the plurality of fan blades 01 are deployed. Exemplarily, the invisible ceiling fan is an invisible fan light.

[0102] The fan provided by the embodiments of the present disclosure significantly improves the wind area, air volume and wind speed of the fan by adopting the above-mentioned fan blades, while significantly reducing the wind noise of the fan.

[0103] Next, the wind area, wind noise, air volume and wind speed of the fan provided by the embodiments of the present disclosure and the fans in the related art will be compared respectively. Among them, these fans can all be invisible fan lights:

[0104] As Figure 12 shown, it is a comparison diagram of the wind area of the fan provided by the embodiments of the present disclosure and the fans in the related art. From Figure 12As can be seen, the wind fields of related fan 1, related fan 2, related fan 3, and related fan 4 are 2m, 1.7m, 2.2m, and 2.4m respectively, while the wind field of the fan of the present disclosure is 5m. It can be seen that, compared with the fans in the related art, the wind field of the fan of the present disclosure is significantly improved. Among them, a wind field of 5m means that the blowing range of the fan is a circle with a diameter of 5m.

[0105] As Figure 13 shown, it is a comparison chart of the wind noise of the fan provided by the embodiment of the present disclosure and the fans in the related art. From Figure 13 it can be seen that the wind noises of related fan 1, related fan 2, related fan 3, and related fan 4 are 35db, 33db, 37db, and 39db respectively, while the wind noise of the fan of the present disclosure is 28db. It can be seen that, compared with the fans in the related art, the wind noise of the fan of the present disclosure is significantly reduced.

[0106] As Figure 14 shown, it is a comparison chart of the air volume of the fan provided by the embodiment of the present disclosure and the fans in the related art. From Figure 14 it can be seen that the air volumes of related fan 1, related fan 2, related fan 3, and related fan 4 are 152m 3 / min, 142m 3 / min, 157m 3 / min, 168m 3 / min respectively, while the air volume of the fan of the present disclosure is 210m 3 / min. It can be seen that, compared with the fans in the related art, the air volume of the fan of the present disclosure is significantly improved.

[0107] As Figure 15 shown, it is a comparison chart of the wind speed of the fan provided by the embodiment of the present disclosure and the fans in the related art. From Figure 15 it can be seen that the wind speeds of related fan 1, related fan 2, related fan 3, and related fan 4 are 0.3m / s, 0.28m / s, 0.39m / s, and 0.42m / s respectively, while the wind speed of the fan of the present disclosure is 1.2m / s. It can be seen that, compared with the fans in the related art, the wind speed of the fan of the present disclosure is significantly improved.

[0108] In addition, when the fan in the related art switches from the stationary state to the working state, it generally needs to rotate 3 - 5 circles so that after the rotational speed of the fan reaches a certain threshold, the fan blades can unfold under the action of a sufficient centrifugal force.

[0109] However, in the fan provided by the embodiment of the present disclosure, as Figure 16As shown, since the third elevation angle C of the second blowing section 4 of the fan blade is relatively large, when the fan blade 01 starts to rotate, the second blowing section 4 can be subjected to a relatively large wind resistance and instantaneously opens. According to the experiment, the fan provided by the embodiment of the present disclosure can expand the fan blade 01 before it rotates one full circle.

[0110] Therefore, compared with the fans in the related art, the fan provided by the embodiment of the present disclosure has the ability to instantaneously expand the fan blade, thereby improving the blowing efficiency of the fan.

[0111] The embodiment of the present disclosure also provides a concealed fan light, as Figure 16 shown. The concealed fan light has a lamp 04. For the relevant descriptions of the concealed fan light, reference can be made to the relevant descriptions of the fan above, and details will not be repeated here.

[0112] The terms used in the embodiments of the present disclosure are only for explaining the embodiments of the present disclosure and are not intended to limit the present disclosure. Unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present disclosure should have the ordinary meanings understood by those of ordinary skill in the art to which the present disclosure belongs. The "first", "second" and similar terms used in the specification and claims of the present patent application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, the terms such as "a" or "one" do not indicate a quantity limitation, but indicate that there is at least one. The terms such as "including" mean that the elements or objects appearing before "including" cover the elements or objects listed after "including" and their equivalents, and do not exclude other elements or objects.

[0113] The above are only optional embodiments of the present disclosure and are not intended to limit the present disclosure. Any modifications, equivalent replacements, improvements, etc. made within the principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A fan blade, characterized in that, the fan blade comprises an installation section (11), a wind locking section (12), a first blowing section (2), a flow guiding section (3) and a second blowing section (4) which are connected in sequence; the installation section (11) is used for connecting a fan blade installation component; the projection of the inner edge of the wind locking section (12) on the horizontal plane is in a first S shape (12a), and the projection of the outer edge of the wind locking section (12) on the horizontal plane is in a second S shape (12b). Wherein, along the direction from the installation section (11) to the first blowing section (2), the first S shape (12a) sequentially comprises a first concave edge (122) and a first convex edge (121) which are in an arc shape, and the second S shape (12b) sequentially comprises a second convex edge (123) and a second concave edge (124) which are in an arc shape; the elevation angles of the inner edges of the first blowing section (2), the flow guiding section (3) and the second blowing section (4) are a first elevation angle (A), a second elevation angle (B) and a third elevation angle (C) respectively. Wherein, the third elevation angle (C) is greater than the first elevation angle (A) and less than the second elevation angle (B); the angle by which the flow guiding section (3) is offset relative to the first blowing section (2) gradually decreases along the direction from one end of the flow guiding section (3) at the inner edge to the other end of the flow guiding section (3) at the outer edge; and / or, the outer edge of the flow guiding section (3) is flush with the outer edges of the first blowing section (2) and the second blowing section (4); and / or, the width of the flow guiding section (3) gradually decreases along the direction from one end of the flow guiding section (3) at the inner edge to the other end of the flow guiding section (3) at the outer edge.

2. The fan blade according to claim 1, characterized in that, the first elevation angle (A) is greater than 8° and less than 12°, the second elevation angle (B) is greater than 42° and less than 52°, and the third elevation angle (C) is greater than 25° and less than 40°.

3. The fan blade according to claim 1, characterized in that, the second elevation angle (B) is 3.5 to 6.5 times the first elevation angle (A), and the second elevation angle (B) is 1.05 to 2.1 times the third elevation angle (C).

4. The fan blade according to any one of claims 1 - 3, characterized in that, the elevation angle of the wind locking section (12) is greater than the elevation angle of the first blowing section (2).

5. The fan blade according to claim 1, characterized in that, the first blowing section (2) has a vibration filtering groove (20).

6. The fan blade according to claim 5, characterized in that, the vibration filtering groove (20) is in an S shape, and a first end (201) of the vibration filtering groove (20) is close to the inner edge of the first blowing section (2), and a second end (202) of the vibration filtering groove (20) is close to the outer edge of the first blowing section (2).

7. The fan blade according to claim 6, characterized in that, the first end (201) of the vibration filtering groove (20) is close to the wind locking section (12), and the second end (202) of the vibration filtering groove (20) is close to the flow guiding section (3).

8. The fan blade according to claim 7, characterized in that, The distance from the first end (201) to the inner edge of the first blowing section (2) is 1.5 to 2.5 times the distance from the second end (202) to the outer edge of the first blowing section (2).

9. The fan blade according to any one of claims 5-8, characterized in that the vibration filtering groove (20) is located on the air outlet side of the first blowing section (2).

10. A fan, characterized in that the fan has a fan blade according to any one of claims 1-9.

11. A concealed fan light, characterized in that the concealed fan light has a fan blade according to any one of claims 1-9.

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