Fan and fan lamp

Abstract

The application provides a fan and a fan lamp, and belongs to the technical field of household appliances. The fan comprises a hub and at least two fan blades. The fan blade comprises a blade root and a blade tip. The blade root of the fan blade is connected to the hub. The fan blade can rotate around the central axis of the hub under the driving of the hub. The vertical installation angles of two adjacent fan blades on the hub are different. The plane during rotation of the fan is defined as a horizontal plane. The connecting line between the blade root and the blade tip is defined as a central axis. The first vertical installation angle between the central axis of the fan blade and the horizontal plane is 1-30 DEG. The second vertical installation angle between the central axis of the adjacent fan blade and the horizontal plane is -1-30 DEG. The vertical installation angles of the adjacent fan blades on the hub are set to be different. The influence of the wake flow between the fan blades is effectively avoided. The operation quality of the fan is optimized. The air supply mode of the fan is a wind pressure disturbance type. Higher pressure difference is formed above and below the fan blade. The weight of the fan blade and the noise during operation are significantly reduced.

Description

Technical Field

[0001] This invention relates to a fan and a fan light, belonging to the field of household appliance technology. Background Technology

[0002] As people's living standards gradually improve, fans with large air volume, wide blowing angle, and low noise are urgently needed. However, most fan lights on the market have sufficient air volume, but they have problems such as small blowing area, concentrated wind speed in the blowing area, periodic "fluttering" noise under the fan light, strong air pressure impact, and high probability of shaking, which bring a poor user experience.

[0003] In view of this, it is indeed necessary to improve the existing fans to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a fan and a fan light to solve at least one of the following problems of existing fans: small air blowing area, concentrated wind speed, high noise, strong wind pressure impact, and vibration during use.

[0005] To achieve the above objectives, the present invention provides a fan, including a hub and at least two fan blades. Each fan blade includes a blade root and a blade tip. The blade root is connected to the hub. The fan blades are capable of rotating around the central axis of the hub under the drive of the hub. The vertical installation angles of two adjacent fan blades on the hub are different. The plane in which the fan rotates is defined as the horizontal plane, and the line connecting the blade root and the blade tip is defined as the central axis. Then, the first vertical installation angle b formed between the central axis of the fan blade and the horizontal plane is 1° to 30°, and the second vertical installation angle c formed between the central axis of the adjacent fan blade and the horizontal plane is -1° to -30°.

[0006] As a further improvement of the present invention, the number of fan blades is even, and the number of fan blades is no more than 24.

[0007] As a further improvement of the present invention, the windward side of the fan blade is defined to include the leading edge and the leeward side to include the trailing edge, and the thickness of the fan blade gradually increases and then gradually decreases from the leading edge to the trailing edge.

[0008] As a further improvement of the present invention, in the rotation direction of the fan, the line connecting the leading edge and the trailing edge is defined as a chord line, the length of the chord line is the chord length, and the ratio of the thickness of the trailing edge to the chord length is in the range of 0.5% to 3%.

[0009] As a further improvement of the present application, the ratio of the maximum thickness of the fan blade to the chord length is in the range of 5% to 20%, and the maximum thickness reaches its maximum value in the length of 20% to 40% of the chord length measured from the leading edge.

[0010] As a further improvement of the present application, a circular arc shaped leading edge portion is formed on the leading edge, the angle corresponding to the circular arc of the leading edge portion is greater than 90° and less than or equal to 180°, and the ratio of the radius of the leading edge portion to the chord length is in the range of 0.25% to 3%.

[0011] As a further improvement of the present application, the ratio of the thickness of the fan blade near the root to the chord length is in the range of 10% to 20%, and the ratio of the thickness of the fan blade near the tip to the chord length is in the range of 5% to 10%.

[0012] As a further improvement of the present application, the angle between the chord line and the horizontal plane is defined as the horizontal installation angle a, and the horizontal installation angle of each cross section of the fan blade in the rotating direction of the fan blade is in the range of 15° to 45°.

[0013] As a further improvement of the present application, the horizontal installation angle of the fan blade near the tip is in the range of 15° to 25°.

[0014] As a further improvement of the present application, the connecting line of the centers of the multiple inscribed circles in each cross section of the fan blade is defined as the camber line, the maximum distance between the camber line and the chord line is defined as the maximum camber, and the distance between the maximum camber of the fan blade and the leading edge is in the range of 40% to 50% of the chord length.

[0015] As a further improvement of the present application, the ratio of the maximum camber in each cross section of the fan blade to the chord length is in the range of 6% to 12%.

[0016] To achieve the above object, the present application provides a fan lamp comprising the aforementioned fan.

[0017] The fan of the present application can effectively avoid the influence of the wake flow between the fan blades by setting the vertical installation angles of the adjacent fan blades on the hub to be different, and can optimize the operation quality of the fan. Meanwhile, the fan of the present application adopts the air pressure disturbance type air supply mode, and can form a higher pressure difference between the upper and lower fan blades, greatly improve the air supply amount of the fan blades, and significantly reduce the weight and noise of the fan blades during operation. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a perspective view of the fan of the preferred embodiment of the present application.

[0019] Figure 2 is Figure 1Schematic diagram of the first vertical installation angle of the middle fan blade and the hub.

[0020] Figure 3 is Figure 1 Schematic diagram of the second vertical installation angle of the middle fan blade and the hub.

[0021] Figure 4 is Figure 1 Schematic diagram of the rotation direction of the middle fan and the chord line.

[0022] Figure 5 is Figure 1 Schematic diagram of the horizontal installation angle of the middle fan blade and the hub.

[0023] Figure 6 is Figure 1 Schematic diagram of the cross section of the middle fan blade along the rotation direction.

[0024] BRIEF DESCRIPTION OF DRAWINGS 100 - fan, 1 - hub, 2 - blade, 21 - horizontal plane, 22 - chord line, 23 - middle axis, 24 - leading edge, 241 - leading edge part, 25 - trailing edge, 251 - trailing edge part, 26 - upper surface, 27 - lower surface, 28 - maximum thickness, 29 - middle camber line, 30 - maximum camber, 31 - rotation direction, a - horizontal installation angle, b - first vertical installation angle, c - second vertical installation angle. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is described in detail below in combination with the drawings and specific embodiments.

[0026] Referring to Figure 1 shown, the present application discloses a fan lamp, which combines a fan 100 and a lamp to meet the needs of people for different functions. Specifically, the fan lamp comprises a hanging bracket fixed with a mounting surface, a shaft, a motor, the fan 100 and the lamp, wherein one end of the shaft is connected with the hanging bracket, the other end of the shaft is connected with the motor and the lamp, the lamp emits light outwardly for illumination; the motor is connected with the fan 100 and drives the fan 100 to rotate to send air outwardly. Of course, the present application mainly improves the specific structure of the fan 100, so the hanging bracket, the shaft, the motor and the lamp can be designed according to the prior art, which will not be described in detail here.

[0027] The fan 100 comprises a hub 1 and at least two blades 2, the blades 2 are installed on the hub 1 and can rotate around the central axis of the hub 1 under the driving of the hub 1. Specifically, the hub 1 is cylindrically arranged, the blades 2 are installed on the side surface of the hub 1, and the plane during the rotation of the fan 100 is defined as the horizontal plane 21.

[0028] In this embodiment, the number of fan blades 2 is even, not exceeding 24, and the installation positions of the fan blades 2 are centrally symmetrically arranged on the horizontal plane 21, so that when the fan 100 rotates, the centrifugal force generated by each fan blade 2 is the same, maintaining the stable rotation of the fan 100 and preventing the fan 100 from tilting or swaying. Of course, in other embodiments, the number of fan blades 2 can be odd or exceed 24, and there is no limitation here.

[0029] Please see Figures 1 to 6 As shown, the vertical installation angles of two adjacent fan blades 2 on the hub 1 are different. Each fan blade 2 includes a root and a tip. The root is connected to the hub 1, and the tip is located at the end of the fan blade 2 furthest from the hub 1. The line connecting the root and tip is defined as the central axis 23. The first vertical installation angle b formed between the central axis 23 of one fan blade 2 and the horizontal plane 21 is 1° to 30°, and the second vertical installation angle c formed between the central axis 23 of the adjacent fan blade 2 and the horizontal plane 21 is -1° to -30°. In other words, adjacent fan blades 2 are staggered; that is, the central axis 23 of one fan blade 2 is above the horizontal plane 21, and the central axis 23 of its adjacent fan blade 2 is below the horizontal plane 21. This avoids the influence of wake flow between adjacent fan blades 2 during the rotation of the fan 100, reducing vibration and noise during fan 100 rotation. Preferably, the absolute values ​​of the included angles between the central axes 23 of two adjacent fan blades 2 and the horizontal plane 21 are equal.

[0030] For details, please refer to [link / reference]. Figure 4 As shown, the fan blade 2 also includes a leading edge 24 and a trailing edge 25. The leading edge 24 is located on the windward side when the fan blade 2 rotates, and the trailing edge 25 is located on the leeward side when the fan blade 2 rotates. In the rotation direction 31 of the fan 100, the line connecting the leading edge 24 and the trailing edge 25 is defined as the chord line 22, and the length of the chord line 22 is the chord length.

[0031] For details, please refer to [link / reference]. Figure 5 As shown, the fan blade 2 extends from the blade root to the blade tip. In the rotation direction 31 of the fan blade 2, the angle between the chord length line 22 and the horizontal plane 21 is defined as the horizontal installation angle α. The range of the horizontal installation angle α for each cross-section of the fan blade 2 is 15° to 45°. Specifically, the range of the horizontal installation angle α near the blade tip is 15° to 25°. Specifically, the range of the horizontal installation angle α for the fan blade cross-section with a length of 1 / 4 of the chord length near the blade tip is 15° to 25°. This design makes the angle between the fan blade 2 and the horizontal plane 21 more gradual as the fan blade 2 extends outward from the hub 1, thus reducing the contact area between the fan blade 2 and the air. This reduces the centrifugal force generated when the fan 100 rotates, preventing the fan 100 from wobbling during rotation. Furthermore, it expands the airflow angle of the fan 100, increasing the coverage area of ​​the airflow while reducing the intensity of the airflow.

[0032] With reference to the drawings Figure 6 As shown, the fan blade 2 further comprises a leading edge portion 241 and a trailing edge portion 251, the leading edge 24 is arranged at the edge of the leading edge portion 241, and the trailing edge 25 is arranged at the edge of the trailing edge portion 251, the leading edge portion 241 is in the form of a circular arc, the angle corresponding to the circular arc of the leading edge portion 241 is greater than 90° and less than or equal to 180°, and the ratio of the radius of the leading edge portion 241 to the chord length is in the range of 0.25% to 3%. In this way, when the fan blade 2 rotates, the sound of the fan blade 2 cutting the air is reduced, and the noise generated by the fan 100 during operation is further reduced.

[0033] The fan blade 2 further comprises an upper surface 26 and a lower surface 27, wherein the lower surface 27 is the side of the fan blade 2 facing the air outlet side, and the upper surface 26 is the side of the fan blade 2 away from the air outlet side. Specifically, the upper surface 26 of the fan blade 2 protrudes outward, and the lower surface 27 is recessed inward. During rotation, the air flows under the drive of the lower surface 27 to blow outward.

[0034] The distance between the upper surface 26 and the lower surface 27 is the thickness, and the thickness of the fan blade 2 gradually increases and then gradually decreases from the leading edge 24 to the trailing edge 25. In this way, a higher pressure difference is generated between the upper and lower surfaces of the fan blade 2 to increase the air supply amount of the fan blade 2.

[0035] Specifically, the ratio of the thickness of the trailing edge 25 to the chord length is in the range of 0.5% to 3%, and there is a maximum thickness 28 between the leading edge 24 and the trailing edge 25. The ratio of the maximum thickness 28 to the chord length is in the range of 5% to 20%, and the maximum thickness 28 reaches its maximum value in the length of 20% to 40% of the chord length measured from the leading edge 24. That is, the thickness of the fan blade 2 on the cross section in the rotation direction 31 is not uniform, and the thickness of the fan blade 2 is thick in the middle and thin on both sides. The maximum thickness 28 of the fan blade 2 is arranged close to the leading edge 24, and the thickness of the fan blade 2 and the chord length have a certain ratio relationship.

[0036] The ratio of the thickness of the fan blade 2 close to the root side to the chord length is in the range of 10% to 20%, and the ratio of the thickness of the fan blade 2 close to the tip side to the chord length is in the range of 5% to 10%. Specifically, the ratio of the thickness of the fan blade section close to the root side with a length of 1 / 2 chord length to the chord length is in the range of 10% to 20%, and the ratio of the thickness of the fan blade section close to the tip side with a length of 1 / 2 chord length to the chord length is in the range of 5% to 10%. In short, the chord length line 22 is divided into two equal length sections, the thickness of the section close to the root side is greater than the thickness of the section close to the tip side, so that the fan blade 2 can increase the air supply amount while reducing the weight of the fan blade 2.

[0037] The maximum distance between the middle camber line 29 and the chord line 22 is the maximum camber 30, the distance between the maximum camber 30 and the leading edge 24 is 40%-50% of the chord length, and the ratio of the maximum camber 30 to the chord length in each cross section of the fan blade 2 is 6%-12%. In other words, the maximum camber 30 is arranged close to the blade root to increase the air supply of the fan blade 2.

[0038] As an embodiment of the present application, the size parameters of the fan 100 are as follows:

[0039] The radius of the fan blade 2 (the length from the blade root to the blade tip): 173 mm;

[0040] The radius of the hub 1: 58 mm;

[0041] The maximum cross-sectional chord length (the distance between the leading edge 24 and the trailing edge 25): 68 mm;

[0042] The minimum cross-sectional chord length (the distance between the leading edge 24 and the trailing edge 25): 28 mm;

[0043] The ratio of the cross-sectional thickness to the chord length: 7.3%-10%;

[0044] The blade angle of the fan blade 2 (the angle between the fan blade 2 and the horizontal plane 21 in the vertical direction): +1° to -10°;

[0045] The installation angle of the fan blade 2 (the angle between the chord line 22 and the horizontal plane in the horizontal direction): 42° to 21.5°.

[0046] In summary, the fan blade 2 of the present application can effectively avoid the influence of the wake flow between the fan blades 2 by arranging the vertical installation angles of the adjacent fan blades 2 on the hub 1 to be different, and optimize the operation quality of the fan 100. Meanwhile, the air supply mode of the fan 100 of the present application is the wind pressure disturbance type, which forms a higher pressure difference between the upper and lower fan blades 2, greatly increases the air supply of the fan blade 2, and can significantly reduce the weight and noise of the fan blade 2 during operation.

[0047] The above embodiments are only used to illustrate the technical solutions of the present application but not limit the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the present application.

Claims

1. A fan, characterized in that: The fan (100) includes a hub (1) and at least two fan blades (2). Each fan blade (2) includes a blade root and a blade tip. The blade root of the fan blade (2) is connected to the hub (1). The fan blade (2) can rotate around the central axis of the hub (1) under the drive of the hub (1). The vertical installation angles of two adjacent fan blades (2) on the hub (1) are different. The plane in which the fan (100) rotates is defined as the horizontal plane (21), and the line connecting the blade root and the blade tip is defined as the central axis (23). Then, the first vertical installation angle (b) formed between the central axis (23) of the fan blade (2) and the horizontal plane (21) is 1° to 30°, and the second vertical installation angle (c) formed between the central axis (23) of the adjacent fan blade (2) and the horizontal plane (21) is -1° to -30°. The windward side of the fan blade (2) is defined as the leading edge (24), and the leeward side is defined as the trailing edge (25). In the rotation direction of the fan (100), the line connecting the leading edge (24) and the trailing edge (25) is defined as the chord length line (22). The angle between the chord length line (22) and the horizontal plane (21) is defined as the horizontal installation angle (a). The range of the horizontal installation angle (a) of each section of the fan blade (2) in its rotation direction is 15° to 45°. The horizontal installation angle (a) of the fan blade (2) near the tip is 15° to 25°.

2. The fan according to claim 1, characterized in that: The number of fan blades (2) is even, and the number of fan blades (2) is no more than 24.

3. The fan according to claim 1, characterized in that: The thickness of the fan blade (2) gradually increases and then gradually decreases from the leading edge (24) to the trailing edge (25).

4. The fan according to claim 3, characterized in that: The length of the chord line (22) is the chord length, and the ratio of the thickness of the trailing edge (25) to the chord length is in the range of 0.5% to 3%.

5. The fan according to claim 4, characterized in that: The ratio of the maximum thickness of the fan blade (2) to the chord length is in the range of 5% to 20%, and the maximum thickness reaches its maximum value in the range of 20% to 40% of the chord length measured from the leading edge (24).

6. The fan according to claim 4, characterized in that: An arc-shaped leading edge portion (241) is formed on the leading edge edge (24), the angle corresponding to the arc of the leading edge portion (241) is greater than 90° and less than or equal to 180°, and the ratio of the radius of the leading edge portion (241) to the chord length is in the range of 0.25% to 3%.

7. The fan according to claim 4, characterized in that: The ratio of the thickness of the fan blade (2) near the leaf root to the chord length is in the range of 10% to 20%; the ratio of the thickness of the fan blade (2) near the leaf tip to the chord length is in the range of 5% to 10%.

8. The fan according to claim 4, characterized in that: The line connecting the centers of multiple inscribed circles in each section of the fan blade (2) is defined as the middle arc line (29), the maximum distance between the middle arc line (29) and the chord length line (22) is defined as the maximum curvature (30), and the distance between the maximum curvature (30) of the fan blade (2) and the leading edge (24) accounts for 40% to 50% of the chord length.

9. The fan according to claim 8, characterized in that: The ratio of the maximum curvature (30) of each section of the fan blade (2) to the chord length ranges from 6% to 12%.

10. A fan light, characterized in that: Includes the fan (100) as described in any one of claims 1-9.

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