Fan and ceiling fan light

Abstract

The present invention provides a fan and a fan light. The fan includes: a base body having a cavity; a blower installed in the cavity; an air duct structure including a first air duct structure and a second air duct structure communicating with the first air duct structure, the first air duct structure being communicatively arranged between the cavity of the base body and the second air duct structure; an air outlet provided on the second air duct structure; wherein the second air duct structure includes a first air duct section and a second air duct section communicating with each other, both the first air duct section and the second air duct section communicate with the first air duct structure, and the gas flow direction in the first air duct section is opposite to the gas flow direction in the second air duct section. The technical solution of the present application effectively solves the problem in the related art that the air volume is small, resulting in poor user experience.

Description

Technical Field

[0001] The present invention relates to the technical field of small household appliances, and in particular, to a fan and a fan light. Background Art

[0002] Fans and lamps are commonly used household appliances in homes. Traditional fans and lamps are two separate products. The fan provides wind energy and the lamp provides illumination. To meet the market demand, there are bladeless fan ceiling lights currently available on the market.

[0003] In the related art, the air blown by the blower in the bladeless fan ceiling light flows continuously in one direction and flows out through the air outlet. This results in a small air volume and a poor user experience. Summary of the Invention

[0004] The main object of the present invention is to provide a fan and a fan light to solve the problem of poor user experience caused by a small air volume in the related art.

[0005] To achieve the above object, according to one aspect of the present invention, a fan is provided, including: a base body having a cavity; a blower installed in the cavity; an air duct structure including a first air duct structure and a second air duct structure communicating with the first air duct structure, the first air duct structure being communicatively disposed between the base body cavity and the second air duct structure; an air outlet disposed on the second air duct structure; wherein the second air duct structure includes a first air duct section and a second air duct section communicating with each other, both the first air duct section and the second air duct section communicate with the first air duct structure, and the gas flow direction in the first air duct section is opposite to the gas flow direction in the second air duct section.

[0006] Further, the axis of the first air duct structure extends along the radial direction of the blower or the extending direction of the first air duct structure is parallel to the radial direction of the blower, and the second air duct structure is an annular structure.

[0007] Further, the first air duct structure is a straight air duct, or the first air duct structure is a curved air duct.

[0008] Further, a flared air guiding structure is provided at the connection between the first air duct structure and the second air duct structure.

[0009] Further, the generatrix of the flared air guiding structure is an arc, and the radius of the arc is between 5 mm and 10 mm.

[0010] Further, an air inlet is provided on the base body, the air inlet is located above the blower, and an atmospheric pressure air region is formed between the air inlet and the blower.

[0011] Further, an anti-backflow baffle is further provided on the base body, the anti-backflow baffle is located between the atmospheric pressure air region and the blower, and the anti-backflow baffle shields the outer periphery of the air inlet of the blower.

[0012] Further, the backflow prevention baffle includes a first shielding section and a second shielding section. The first shielding section is located above the fan, and at least part of the structure of the second shielding section extends into the air inlet of the fan.

[0013] Further, the fan includes an impeller, on which a plurality of blades are arranged at intervals. The diameter of the impeller is a1, and the distance between two adjacent blades close to the outer circumference of the impeller is a2. Wherein, a1 and a2 satisfy: a2 = (0.1 - 0.5) * a1.

[0014] Further, the fan further includes a wind deflector, which is inclined and connected to the lower part of the second air duct structure. An air outlet is formed between the wind deflector and the second air duct structure.

[0015] Further, the wind deflector gradually rises from the direction close to the axis of the fan to the direction away from the axis of the fan.

[0016] Further, the fan further includes a connecting member, which is connected between the second air duct structure and the base body, and the connecting member is symmetrically arranged with respect to the center of the fan with the air duct structure.

[0017] Further, the distance between the top of the second air duct structure and the top of the base body is b1, and the diameter of the second air duct structure is b2. Wherein, b1 and b2 satisfy: b2 = (2 - 5) * b1; the width b3 of the air outlet satisfies: 1mm ≤ b3 ≤ 3mm.

[0018] Further, the height of the first air duct structure gradually decreases from the direction close to the fan to the direction close to the second air duct structure.

[0019] Further, the fan further includes a driving device and a control device, and the driving device and the control device are located in the normal pressure air area.

[0020] According to another aspect of the present invention, a fan lamp is provided, including a fan and a lamp body arranged on the fan, and the fan is the above-mentioned fan.

[0021] Further, the fan further includes a wind deflector, which is inclined and connected to the lower part of the second air duct structure. An air outlet is formed between the wind deflector and the second air duct structure, and the lamp body and the air outlet are respectively located on the inner and outer sides of the wind deflector.

[0022] Applying the technical solution of the present invention, the fan is arranged in the cavity, and the air duct structure includes a first air duct structure and a second air duct structure. The first air duct structure is connected to the second air duct structure and the cavity and is located between the second air duct structure and the cavity. The air outlet is arranged on the second air duct structure. The second air duct structure includes a first air duct section and a second air duct section, and the connection between the first air duct section and the second air duct section corresponds to the first air duct structure. The flow directions of the gas in the first air duct section and the second air duct section are opposite. From the above content, it can be seen that the air blown by the fan flows through the first air duct structure to the connection between the first air duct section and the second air duct section, and is divided at the connection between the first air duct section and the second air duct section, that is, the air enters the first air duct section and the second air duct section respectively and flows in the first air duct section and the second air duct section, and then flows out through the air outlet. In this way, the air volume can be effectively increased, and uneven air outlet can be avoided. Therefore, the technical solution of the present application effectively solves the problem that the air volume is small in the related technology, resulting in poor user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0024] Figure 1 A cross-sectional schematic view showing an embodiment of a fan according to the present invention is shown;

[0025] Figure 2 It shows Figure 1 A partial enlarged view of the fan;

[0026] Figure 3 It shows Figure 1 A cross-sectional schematic view of the fan from another angle;

[0027] Figure 4 It shows Figure 1 A top view schematic diagram of the impeller of the fan;

[0028] Figure 5 It shows Figure 4 A three-dimensional structure schematic diagram of the impeller; and

[0029] Figure 6 It shows Figure 1 A three-dimensional structure schematic diagram of the fan.

[0030] Among them, the above-mentioned drawings include the following reference numerals:

[0031] 10. Substrate; 11. Cavity; 12. Air inlet; 13. Anti - reflux baffle; 20. Fan; 30. Air duct structure; 31. First air duct structure; 32. Second air duct structure; 321. First air duct section; 322. Second air duct section; 40. Air outlet; 50. Lamp body; 60. Flared air guiding structure; 70. Windshield; 80. Connector. Detailed implementation manners

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way limits the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] It should be noted that the terms used herein are only for describing specific implementation manners and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless otherwise clearly specified in the context, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or their combinations.

[0034] Unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions, and values set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that for the sake of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0035] Compared with the prior art in which a one - way circulating wind is formed in an annular air duct through two air outlets, the technical solution of this embodiment selects to output two winds with different wind directions through a single air delivery pipe.

[0036] The inventor found that in the prior art, selecting two air supply ducts seemingly increases the air output, but actually greatly shortens the length of the Archimedes spiral air duct, which greatly affects the air pressure boosting effect. At the same time, in the prior art, selecting unidirectional circulating air supply will cause the air to continuously circulate ineffectively in the annular air duct, and finally the air output through the air outlet is not much. The technical solution of this application supplies air through one air supply duct, extending the length of the Archimedes spiral air duct and enhancing the air pressure boosting effect. At the same time, the technical solution of this embodiment selects to output two winds with different wind directions simultaneously. Seemingly, the wind directions conflict, but actually, through the counteraction of the winds, the air pressure is increased, further increasing the air output. At the same time, the structure of the fan in this embodiment is simple, without the need to additionally increase a pressure boosting mechanism, and without making major changes to the appearance of the product, the air supply effect can be significantly improved.

[0037] The bladeless fan has a unique shape and air supply technology; and its hidden blade design will not cover dust or hurt the fingers inserted by children, so it is becoming more and more popular in the market. In the related art, the air has only one flow direction in the air outlet duct. When flowing out through the air outlet, the speed of the air gradually decreases during the flow, so that the air cannot effectively blow to the user. To solve the above problems. As Figure 1 and Figures 3 to 5 shown, in this embodiment, the fan includes: a base 10, a fan 20, an air duct structure 30, and an air outlet 40. The base 10 has a cavity 11. The fan 20 is installed in the cavity 11. The air duct structure 30 includes a first air duct structure 31 and a second air duct structure 32 communicated with the first air duct structure 31. The first air duct structure 31 is communicatively arranged between the cavity 11 of the base 10 and the second air duct structure 32. The air outlet 40 is arranged on the second air duct structure 32. Among them, the second air duct structure 32 includes a first air duct section 321 and a second air duct section 322 communicated with each other. The first air duct section 321 and the second air duct section 322 are both communicated with the first air duct structure 31, and the gas flow direction in the first air duct section 321 is opposite to the gas flow direction in the second air duct section 322.

[0038] Applying the technical solution of this embodiment, the fan 20 is arranged in the cavity 11. The air duct structure 30 includes a first air duct structure 31 and a second air duct structure 32. The first air duct structure 31 is connected to the second air duct structure 32 and the cavity 11 and is located between the second air duct structure 32 and the cavity 11. The air outlet 40 is arranged on the second air duct structure 32. The second air duct structure 32 includes a first air duct section 321 and a second air duct section 322. The connection part of the first air duct section 321 and the second air duct section 322 corresponds to the first air duct structure 31. The flow directions of the gas in the first air duct section 321 and the second air duct section 322 are opposite. From the above content, it can be seen that the air blown out by the fan 20 flows through the first air duct structure 31 to the connection part of the first air duct section 321 and the second air duct section 322, and is shunted at the connection part of the first air duct section 321 and the second air duct section 322, that is, the air enters the first air duct section 321 and the second air duct section 322 respectively, and flows in the first air duct section 321 and the second air duct section 322, and then flows out through the air outlet 40. In this way, the air volume can be effectively increased, and uneven air outlet can be avoided. Therefore, the technical solution of this embodiment effectively solves the problem that the air volume in the related technology is small, resulting in poor user experience.

[0039] It should be noted that the second air duct structure 32 of this embodiment is an annular structure, and the air in the first air duct section 321 and the air in the second air duct section 322 can collide, that is, strong convective air is generated, which can improve the air volume and air speed.

[0040] In this embodiment, the air outlet of the fan 20 is one, and the air outlet of the fan 20 is connected to the first air duct structure 31, which can ensure that the air blown out by the fan has a fast enough speed, and then the air volume blown out by the lamp is large enough. If multiple air outlets of the fan 20 are set, the air speed will decrease, and then the air volume will decrease, and the user experience will be poor.

[0041] To avoid the loss of air flow velocity, as Figure 1 and Figure 3 shown, in this embodiment, the extending direction of the axis of the first air duct structure 31 is parallel to the radial direction of the fan 20, and the second air duct structure 32 is an annular structure. The above settings can, on the one hand, enable the air blown out by the fan 20 to flow into the first air duct section 321 and the second air duct section 322 respectively, and on the other hand, can exactly correspond to the air outlet of the fan 20, which can effectively reduce the consumption of the air blown out by the fan 20 and ensure the air volume. And the above setting structure is relatively simple and convenient for processing. Specifically, the fan 20 in this embodiment is a centrifugal fan.

[0042] In an embodiment not shown in the figure, the first air duct structure extends radially along the fan, so that the air flow blown out by the fan can also flow into the first air duct structure. If an axial flow fan is used for the fan, the first air duct structure extends axially along the fan. At this time, in order to ensure the maximization of the air volume, it is necessary to make the extension direction of the first air duct structure collinear with the axis of the fan.

[0043] As Figure 1 and Figure 3 shown, in this embodiment, the first air duct structure 31 is a straight air duct. The setting of the straight air duct facilitates the flow of air, and thus can avoid the interference of the first air duct structure 31 on the air flow.

[0044] In an embodiment not shown in the figure, the first air duct structure is a bent air duct. The bent air duct can also effectively make the air circulate.

[0045] Since the angle between the first air duct section 321 and the first air duct structure 31 is an acute angle, this results in a relatively small air volume flowing into the first air duct section 321, and thus the air volumes of the respective air outlets 40 are different. In order to avoid the occurrence of the above situation, the inventor has conducted a large number of experiments and provided a flared air guiding structure 60 at the connection between the first air duct structure 31 and the second air duct structure 32. As Figure 3 shown, in this embodiment, the setting of the flared air guiding structure 60 can effectively reduce the generation of vortices at the connection between the first air duct structure 31 and the first air duct section 321 by the flowing air, which can further ensure the air flow rate, and thus can increase the air volume of the air flowing out through the air outlets 40, and further improve the user experience.

[0046] As Figure 3 shown, in this embodiment, the generatrix of the flared air guiding structure 60 is an arc, and the radius of the arc is 8 mm. The radius of the above arc needs to be coordinated with the overall size of the lamp to avoid the generation of vortices. Of course, the radius of the above arc can be between 5 mm and 10 mm.

[0047] In order to prevent the blown air from being sucked into the air inlet, as Figure 1 and Figure 5 shown, in this embodiment, an air inlet 12 is provided on the base body 10. The air inlet 12 is located above the fan 20, and an atmospheric pressure air area is formed between the air inlet 12 and the fan 20. The air inlet 12 is provided above the fan, and a screen structure is provided at the air inlet 12, so that impurities can be prevented from entering the first air duct structure 31 and the second air duct structure 32. At the same time, since the air inlet 12 is provided above the fan, that is, above the air outlet 40, the blown air can be prevented from being sucked into the air inlet 12, and thus the blowing effect can be indirectly ensured.

[0048] It should be noted that the above-mentioned normal-pressure air region is only relative to the pressurized air in the air duct structure 30. In actual applications, due to the resistance of the air inlet 12, the air pressure in the normal-pressure air region may be slightly lower than the external air pressure.

[0049] To avoid the wind from flowing back, that is, to prevent the wind from flowing from the fan to the air inlet, as Figure 1 shown, in this embodiment, a backflow prevention baffle 13 is further provided on the base body 10. The backflow prevention baffle 13 is located between the normal-pressure air region and the fan 20, and the backflow prevention baffle 13 shields the outer periphery of the air inlet of the fan 20. The backflow prevention baffle 13 separates the normal-pressure area and the compressed air area (inside the air duct structure 30), preventing the air from flowing back. Coupled with the fan 20 cooperating with the Archimedes spiral air duct, a strong convection air duct with high wind speed and high wind pressure is formed.

[0050] To improve the effect of preventing backflow, as Figure 1 shown, in this embodiment, the backflow prevention baffle 13 includes a first shielding section and a second shielding section. The first shielding section is connected above the fan 20, and at least part of the structure of the second shielding section extends into the air inlet of the fan 20. The first shielding section and the second shielding section cooperate, thus making the shielding effect better. Even if the wind flows between the fan 20 and the backflow prevention baffle 13, it can still flow back into the air inlet of the fan 20 through the action of the second shielding section.

[0051] As Figure 4 and Figure 5 shown, in this embodiment, the fan 20 includes an impeller. A plurality of blades are arranged at intervals on the impeller. The diameter of the impeller is a1, and the distance between two adjacent blades close to the outer periphery of the impeller is a2. Among them, a1 and a2 satisfy: a2 = (0.1 - 0.5) * a1. The above ratio relationship can obtain a higher air pressure and wind speed. Specifically, in this embodiment, a2 = 0.3a1.

[0052] To prevent the wind baffle from being blown out, as Figure 1 and Figure 2 shown, in this embodiment, the fan further includes a wind baffle 70. The wind baffle 70 is inclined. The wind baffle 70 is connected below the second air duct structure 32, and an air outlet 40 is formed between the wind baffle 70 and the second air duct structure 32. Since the wind baffle 70 is inclined, the size of the air outlet 40 is smaller than the cross-sectional size of the second air duct structure 32. This enables the wind to flow out through the air outlet 40, increasing the wind speed, and further enabling the wind to blow a farther distance. Specifically, the wind baffle 70 is an arc-shaped plate, which also enables the wind baffle 70 to guide the wind and avoid the direct blowing of the wind.

[0053] As Figure 1 and Figure 2As shown, in this embodiment, the wind deflector 70 gradually rises in the direction from near the axis of the fan 20 to far from the axis of the fan 20. Such a setting can make the overall structure more regular and ensure the structural strength of the wind deflector 70, preventing the wind deflector 70 from being blown off.

[0054] In an embodiment not shown in the figure, the wind deflector is horizontally placed in the second air duct, or the wind deflector gradually decreases in the direction from near the axis of the fan to far from the axis of the fan, or the wind deflector is conical, and the end of the cone is set as the air outlet.

[0055] To make the overall lamp more stable, as Figure 3 and Figure 6 shown, in this embodiment, the fan further includes a connecting member 80. The connecting member 80 is connected between the second air duct structure 32 and the base 10, and the connecting member 80 and the air duct structure 30 are symmetrically arranged about the center of the fan 20. Specifically, the structural shape of the connecting member 80 is the same as that of the first air duct structure 31. This can effectively balance the centrifugal force generated when the fan 20 rotates, indirectly ensuring the stability of the lamp.

[0056] As Figure 1 and Figure 2 shown, in this embodiment, the distance between the top of the second air duct structure 32 and the top of the base 10 is b1, and the diameter of the second air duct structure 32 is b2, where b1 and b2 satisfy: b2 = (2 - 5) * b1; the width b3 of the air outlet 40 satisfies: 1 mm ≤ b3 ≤ 3 mm. The above ratio can make the air volume larger. Specifically, b2 = 3b1 and b3 = 2 mm.

[0057] As Figure 1 shown, in this embodiment, the height of the first air duct structure 31 gradually decreases in the direction from near the fan 20 to near the second air duct structure 32. The above setting is more convenient for the flow of air. At the same time, this makes the air outlet 40 closer to the user, providing a better user experience.

[0058] As Figure 1 shown, in this embodiment, the fan further includes a driving device and a control device. The driving device and the control device are located in the normal pressure air area. The driving device and the control device can control the rotation of the fan 20, thereby enabling the lamp to realize the blowing function.

[0059] According to another aspect of the present application, a fan lamp is provided. The fan lamp according to this embodiment includes a fan and a lamp body 50 provided on the fan, and the fan is the above-mentioned fan. The above-mentioned fan has a larger air volume and a better blowing effect, which can effectively improve the user's usage effect. Therefore, the fan lamp having the above-mentioned fan also has the above functions.

[0060] To prevent the lamp body from being blown out, the fan further includes a wind deflector 70 which is inclined. The wind deflector 70 is connected below the second air duct structure 32. An air outlet 40 is formed between the wind deflector 70 and the second air duct structure 32. The lamp body 50 and the air outlet 40 are respectively located inside and outside the wind deflector 70. The setting of the wind deflector 70 can effectively separate the wind from the lamp body 50, thereby preventing the wind from directly blowing on the lamp body 50, which can effectively protect the lamp body 50 and avoid its damage.

[0061] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom", etc. is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description. Without contrary description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of the present invention; the orientation words "inside, outside" refer to inside and outside the contour of each component itself.

[0062] For the convenience of description, spatial relative terms such as "above...", "over...", "on the upper surface of...", "above" etc. can be used here to describe the spatial positional relationship between a device or feature shown in the figure and other devices or features. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation described in the figure for the device. For example, if the device in the figure is inverted, the device described as "above other devices or structures" or "over other devices or structures" will be positioned as "below other devices or structures" or "under other devices or structures" afterwards. Thus, the exemplary term "above..." can include both the orientations of "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the corresponding explanations for the spatial relative descriptions used here will be made.

[0063] In addition, it should be noted that using words such as "first", "second" to limit components is only for the convenience of distinguishing the corresponding components. Without additional declaration, the above words have no special meaning. Therefore, it should not be construed as a limitation on the protection scope of the present invention.

[0064] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A fan, characterized in that, Comprising: A base body (10), the base body (10) having a cavity (11); A blower (20), installed within the cavity (11); An air duct structure (30), the air duct structure (30) including a first air duct structure (31) and a second air duct structure (32) communicating with the first air duct structure (31), the first air duct structure (31) being communicatively disposed between the cavity (11) of the base body (10) and the second air duct structure (32); An air outlet (40), provided on the second air duct structure (32); Wherein, the second air duct structure (32) includes a first air duct section (321) and a second air duct section (322) communicating with each other, both the first air duct section (321) and the second air duct section (322) communicating with the first air duct structure (31), and the gas flow direction within the first air duct section (321) being opposite to the gas flow direction within the second air duct section (322), the connection portion of the first air duct section (321) and the second air duct section (322) corresponding to the first air duct structure (31), and the air outlet of the blower (20) communicating with the first air duct structure (31).

2. The fan according to claim 1, characterized in that, The axis of the first air duct structure (31) extends along the radial direction of the blower (20) or the extending direction of the first air duct structure (31) is parallel to the radial direction of the blower (20), and the second air duct structure (32) is an annular structure.

3. The fan according to claim 1, characterized in that, The first air duct structure (31) is a straight air duct, or the first air duct structure (31) is a curved air duct.

4. The fan according to claim 1, characterized in that, A flared air guiding structure (60) is provided at the connection portion of the first air duct structure (31) and the second air duct structure (32).

5. The fan according to claim 4, characterized in that, The generatrix of the flared air guiding structure (60) is an arc, and the radius of the arc is between 5 mm and 10 mm.

6. The fan according to claim 1, characterized in that An air inlet (12) is provided on the base body (10), the air inlet (12) being located above the blower (20), and an atmospheric pressure air region is formed between the air inlet (12) and the blower (20).

7. The fan according to claim 6, wherein, A backflow prevention baffle (13) is further provided on the base body (10), the backflow prevention baffle (13) being located between the atmospheric pressure air region and the blower (20), and the backflow prevention baffle (13) shielding the outer periphery of the air inlet of the blower (20).

8. The fan according to claim 7, characterized in that, The backflow prevention baffle (13) includes a first shielding section and a second shielding section, the first shielding section being located above the blower (20), and at least part of the structure of the second shielding section extending into the air inlet of the blower (20).

9. The fan according to claim 1, characterized in that, The blower (20) includes an impeller, a plurality of blades being spaced apart on the impeller, the diameter of the impeller being a1, and the distance between two adjacent blades close to the outer periphery of the impeller being a2, wherein, a1 and a2 satisfy: a2 = (0.1 - 0.5) * a1.

10. The fan according to claim 1, characterized in that, The fan further includes a wind shielding plate (70), the wind shielding plate (70) being inclined, the wind shielding plate (70) being connected below the second air duct structure (32), and the air outlet (40) being formed between the wind shielding plate (70) and the second air duct structure (32).

11. The fan according to claim 10, characterized in that, The wind deflector (70) gradually rises from the direction close to the axis of the fan (20) to the direction far from the axis of the fan (20).

12. The fan according to claim 1, characterized in that, The fan further includes a connecting member (80). The connecting member (80) is connected between the second air duct structure (32) and the base body (10). The connecting member (80) and the air duct structure (30) are symmetrically arranged about the center of the fan (20).

13. The fan according to claim 1, characterized in that, The distance between the top of the second air duct structure (32) and the top of the base body (10) is b1, and the diameter of the second air duct structure (32) is b2. Wherein, b1 and b2 satisfy: b2 = (2 - 5) * b1; the width b3 of the air outlet (40) satisfies: 1mm ≤ b3 ≤ 3mm.

14. The fan according to claim 1, characterized in that, The first air duct structure (31) gradually decreases in height from the direction close to the fan (20) to the direction close to the second air duct structure (32).

15. The fan according to claim 6, wherein The fan further includes a driving device and a control device, and the driving device and the control device are located in the normal pressure air area.

16. A fan lamp, comprising a fan and a lamp body (50) disposed on the fan, characterized in that, The fan is the fan according to any one of claims 1 to 15.

17. The ceiling fan light according to claim 16, wherein, The fan further includes a wind deflector (70). The wind deflector (70) is inclined. The wind deflector (70) is connected below the second air duct structure (32). An air outlet (40) is formed between the wind deflector (70) and the second air duct structure (32). The lamp body (50) and the air outlet (40) are respectively located inside and outside the wind deflector (70).

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