Fan

Abstract

The utility model relates to the technical field of fans, in particular to a fan. The fan aims at solving the problems that an existing fan is small in air inlet amount and large in noise. In order to achieve the purpose, the fan comprises a shell, a driving assembly, a first fan blade and a second fan blade, the driving assembly is arranged on the shell and comprises two output shafts, the first fan blade and the second fan blade are connected with the output shafts correspondingly, the first fan blade is located on the air outlet side of the second fan blade, and the second fan blade is located on the air outlet side of the second fan blade. And the first fan blades and the second fan blades are arranged at intervals. By the adoption of the technical scheme, when air sequentially flows through the second fan blade and the first fan blade, pressure difference can be formed between the two fan blades, the air volume is increased through pressurization, the first fan blade and the second fan blade are arranged in a spaced mode so that the air can flow more smoothly, and therefore noise reduction caused by wind resistance is avoided; the frequencies generated when two different fan blades rotate can interfere with each other, and the noise reduction effect can also be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, and particularly relates to a fan. Background Art

[0002] As a common household appliance, a fan can accelerate air circulation and improve the living and working environments. For example, when using a fan in summer, the coolness is mainly improved by adjusting the air intake volume of the fan, that is, by increasing the rotation speed of the fan blades. However, when the fan is running, as the rotation speed of the fan blades increases, the noise generated by the fan also increases.

[0003] In the prior art, some fans are provided with double-layer fan blades, and the misalignment angle between the double-layer fan blades is used to increase the air volume and reduce noise. However, this method has limited effects on noise reduction and air volume improvement. In addition, some fans also control the double-layer fan blades to rotate in different directions by two fans to reduce noise, but this will cause problems such as higher fan costs and too large fan heads, affecting the user experience.

[0004] Correspondingly, a new technical solution is needed in this field to solve the above problems. Summary of the Utility Model

[0005] In order to solve at least one of the above problems in the prior art, that is, to solve the problems of small air intake volume and large noise existing in the existing fans, the present application provides a fan, including:

[0006] A housing;

[0007] A driving assembly, the driving assembly is arranged in the housing, and the driving assembly includes two output shafts;

[0008] A first fan blade and a second fan blade, the first fan blade and the second fan blade are respectively connected to one of the output shafts, the first fan blade is located on the air outlet side of the second fan blade, and the first fan blade and the second fan blade are arranged at intervals.

[0009] In the case of adopting the above technical solution, when the fan is running, the driving assembly drives the first fan blade and the second fan blade simultaneously through two output shafts spaced at a certain distance. When the air flows through the second fan blade and the first fan blade in sequence, a pressure difference will be formed between the two fan blades, so as to increase the air volume through pressurization. In addition, the interval arrangement between the first fan blade and the second fan blade can make the air flow more smoothly, thereby avoiding the generation of wind resistance and reducing noise. In addition, the frequencies generated when the two different fan blades rotate can interfere with each other, and the effect of noise reduction can also be achieved.

[0010] In the preferred technical solution of the above fan, the number of blades of the first fan blade is greater than or equal to the number of blades of the second fan blade.

[0011] In the case of adopting the above technical solution, while ensuring the air intake volume, the first fan blade can cut and guide the air blown out from the second fan blade more meticulously, making the wind feeling close to natural wind, thereby improving the user experience.

[0012] In the preferred technical solution of the above fan, the edge of the first fan blade is set to be streamlined; and / or

[0013] The edge of the second fan blade is set to be arc-shaped.

[0014] In the case of adopting the above technical solution, the second fan blade can capture more air and guide it to the first fan blade, and the first fan blade can accelerate and push the air forward. In addition, through different structural settings, the first fan blade and the second fan blade can generate different rotation frequencies when rotating, and then achieve the noise reduction effect through interference.

[0015] In the preferred technical solution of the above fan, the housing includes an air inlet grille, an air outlet grille and a first air guide ring, and the air inlet grille and the air outlet grille are respectively connected to two end sides of the first air guide ring.

[0016] In the preferred technical solution of the above fan, the fan further includes a connecting component, one end of the connecting component is sleeved outside the driving component, and the other end is connected to the housing.

[0017] In the preferred technical solution of the above fan, the connecting component includes a clamp, a second air guide ring and a connecting rod. The clamp is sleeved outside the driving component, the second air guide ring is connected to the air inlet grille, and the second air guide ring is sleeved inside the first air guide ring. The clamp and the second air guide ring are connected by a plurality of the connecting rods.

[0018] In the preferred technical solution of the above fan, the air outlet grille includes a decorative cover. The decorative cover is located at the center of the air outlet grille. The decorative cover is provided with a first ventilation hole, a second ventilation hole and a third ventilation hole, and the areas of the first ventilation hole, the second ventilation hole and the third ventilation hole decrease in sequence;

[0019] Both the second ventilation hole and the third ventilation hole are provided in plurality. The first ventilation hole is located at the center of the decorative cover. A plurality of the second ventilation holes are arranged around the outside of the plurality of the first ventilation holes, and a plurality of the third ventilation holes are arranged around the outside of the plurality of the second ventilation holes.

[0020] In the case of adopting the above technical solution, the settings of the first ventilation hole, the second ventilation hole and the third ventilation hole are beneficial to avoiding wind resistance generated by the decorative cover, thereby further ensuring the air intake volume of the fan.

[0021] In the preferred technical solution of the above-mentioned fan, the distance between the first fan blade and the second fan blade is any value within 35 mm - 100 mm; and / or

[0022] The rotational speeds of both the first fan blade and the second fan blade are any value within 1000 r / min - 1400 r / min.

[0023] In the preferred technical solution of the above-mentioned fan, the fan further includes a support rod and a base. One end of the support rod is connected to the base, and the other end is connected to the housing.

[0024] In the preferred technical solution of the above-mentioned fan, a control board is provided on the support rod; and / or

[0025] The support rod is telescopically arranged. Description of the Drawings

[0026] The following describes the fan of the present application with reference to the drawings. In the drawings:

[0027] Figure 1 is the front view of the fan of the present application;

[0028] Figure 2 is the rear view of the fan of the present application;

[0029] Figure 3 is the partial view of the fan of the present application;

[0030] Figure 4 is the front view of the first fan blade and the second fan blade of the present application;

[0031] Figure 5 is the rear view of the first fan blade and the second fan blade of the present application;

[0032] Figure 6 is the left view of the first fan blade and the second fan blade of the present application;

[0033] Figure 7 is the schematic diagram of the connection component of the present application.

[0034] List of Reference Numerals

[0035] 10. Housing; 11. Inlet air grille; 12. Outlet air grille; 121. Decorative cover; 13. First air guide ring; 20. Drive assembly; 30. First fan blade; 40. Second fan blade; 50. Connection component; 51. Clamp; 52. Second air guide ring; 53. Connecting rod; 60. Support rod; 70. Base; 80. Control board. Detailed Description of the Invention

[0036] The preferred embodiments of the present application will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principle of the present application and are not intended to limit the protection scope of the present application. For example, the first fan blade and the second fan blade are introduced in combination with a general household fan, but this is not intended to limit the protection scope of the present application. Without departing from the principle of the present application, those skilled in the art can apply the first fan blade and the second fan blade to devices such as humidifiers.

[0037] It should be noted that in the description of the present application, the terms indicating directions or positional relationships such as "center", "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings. This is only for convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of the present application, "a plurality" means at least two.

[0038] In addition, it should be noted that in the description of the present application, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0039] As described in the background art, as a common household appliance, a fan can accelerate air circulation and improve the living and working environment. For example, when using a fan in summer, the coolness is mainly improved by adjusting the air intake of the fan, that is, by increasing the rotation speed of the fan blade. However, when the fan is running, as the rotation speed of the fan blade increases, the noise generated by the fan also increases.

[0040] In the prior art, some fans are provided with double-layer fan blades, and the misalignment angle between the double-layer fan blades is used to increase the air volume and reduce noise. However, this method has limited effects on noise reduction and air volume improvement. In addition, some fans also control the double-layer fan blades to rotate in different directions by two blowers to reduce noise, but this will cause problems such as higher fan costs and too large fan heads, affecting the user experience.

[0041] In order to solve the problems of small air intake and high noise existing in existing fans, the present application provides a fan, which includes a housing, a driving component, a first fan blade and a second fan blade. Among them, the driving component is arranged in the housing. The driving component includes two output shafts. The first fan blade and the second fan blade are respectively connected to one output shaft. The first fan blade is located on the air outlet side of the second fan blade, and the first fan blade and the second fan blade are arranged at intervals.

[0042] In the case of adopting the above technical solution, when the fan operates, the driving component drives the first fan blade and the second fan blade simultaneously through two output shafts spaced a certain distance apart. When air flows through the second fan blade and the first fan blade in sequence, a pressure difference will be formed between the two fan blades, so as to increase the air volume through pressurization. In addition, the interval arrangement between the first fan blade and the second fan blade can make the air flow more smoothly, so as to avoid generating wind resistance and reduce noise. In addition, the frequencies generated when the two different fan blades rotate can interfere with each other, and the noise reduction effect can also be achieved.

[0043] The following refers to Figures 1 to 7 , and describes the fan of the present application. Among them, Figure 1 is the front view of the fan of the present application; Figure 2 is the rear view of the fan of the present application; Figure 3 is a partial view of the fan of the present application; Figure 4 is the front view of the first fan blade and the second fan blade of the present application; Figure 5 is the rear view of the first fan blade and the second fan blade of the present application; Figure 6 is the left view of the first fan blade and the second fan blade of the present application; Figure 7 is a schematic diagram of the connection component of the present application.

[0044] As Figures 1 to 7 shown, in a preferred embodiment, the fan includes a housing 10, a driving component 20, a first fan blade 30, a second fan blade 40, a connection component 50, a support rod 60, a base 70 and a control board 80. Among them, the driving component 20, the first fan blade 30, the second fan blade 40 and the connection component 50 are all arranged in the housing 10. One end of the support rod 60 is connected to the base 70, and the other end is connected to the housing 10. The support rod 60 is telescopically arranged, and a control board 80 is arranged on the support rod 60.

[0045] As Figures 1 to 3As shown in the figure, the housing 10 includes an air inlet grille 11, an air outlet grille 12 and a first air guide ring 13. The air inlet grille 11 and the air outlet grille 12 are respectively connected to two end sides of the first air guide ring 13. The air outlet grille 12 includes a decorative cover 121. The decorative cover 121 is located at the center of the air outlet grille 12. The decorative cover 121 is provided with a first ventilation hole, a second ventilation hole and a third ventilation hole. The areas of the first ventilation hole, the second ventilation hole and the third ventilation hole decrease in sequence. The second ventilation hole and the third ventilation hole are both provided in plurality. The first ventilation hole is located at the center of the decorative cover 121. A plurality of second ventilation holes are arranged around the outside of the plurality of first ventilation holes. A plurality of third ventilation holes are arranged around the outside of the plurality of second ventilation holes.

[0046] As Figures 4 to 6 shown in the figure, the drive assembly 20 includes two output shafts. The first fan blade 30 and the second fan blade 40 are respectively connected to an output shaft. The first fan blade 30 and the second fan blade 40 are arranged at intervals, and the first fan blade 30 is located on the air outlet side of the second fan blade 40. In addition, the number of blades of the first fan blade 30 is equal to the number of blades of the second fan blade 40, and the edge of the first fan blade 30 is set to be streamline, and the edge of the second fan blade 40 is set to be arc-shaped. Among them, the interval distance between the first fan blade 30 and the second fan blade 40 is any value in 35mm - 100mm, and the rotation speeds of the first fan blade and the second fan blade are both any value in 1000r / min - 1400r / min. Preferably, the interval distance between the first fan blade 30 and the second fan blade 40 is 45mm, and the rotation speeds of the first fan blade 30 and the second fan blade 40 are both 1200r / min.

[0047] As Figure 7 shown in the figure, one end of the connection assembly 50 is sleeved on the outside of the drive assembly 20, and the other end is connected to the housing 10. Specifically, the connection assembly 50 includes a clamp 51, a second air guide ring 52 and a connecting rod 53. The clamp 51 is sleeved on the outside of the drive assembly 20. The second air guide ring 52 is connected to the air inlet grille 11, and the second air guide ring 52 is sleeved inside the first air guide ring 13. The clamp 51 and the second air guide ring 52 are connected by a plurality of connecting rods 53.

[0048] In this embodiment, the user can start the fan and adjust the rotation speeds of the first fan blade 30 and the second fan blade 40 through the control panel 80. During the operation of the fan, when air flows through the second fan blade 40 and the first fan blade 30 in sequence, the flow velocity will change. Therefore, a pressure difference will be formed between the first fan blade 30 and the second fan blade 40, thereby increasing the air intake volume through pressurization. Moreover, since there is a certain distance between the first fan blade 30 and the second fan blade 40, the air can achieve a smooth transition between the first fan blade 30 and the second fan blade 40, avoiding the generation of turbulence, so as to achieve the noise reduction effect. In addition, due to the different structures such as the shapes and angles of the first fan blade 30 and the second fan blade 40, the second fan blade 40 with an arc-shaped edge can better capture the air and guide the air to the first fan blade 30, while the first fan blade 30 with a streamlined edge can re-cut, accelerate and push the air forward, thereby further increasing the air volume of the fan by increasing the pressure difference between the first fan blade 30 and the second fan blade 40, and further promoting the air flow to avoid noise generated by wind resistance. Moreover, the two fan blades with different structures can generate different rotation frequencies when rotating, and the noise reduction effect can be further improved through the mutual interference between different frequencies, improving the user experience.

[0049] It should be noted that in this embodiment, the number of blades of both the first fan blade 30 and the second fan blade 40 is nine. A larger number of fan blades can cut the air into finer pieces, making the air flow more uniform and stable, and making the noise frequency generated by the air flow more dispersed, so as to achieve the noise reduction effect while ensuring the air volume. However, its setting is not fixed. In an alternative embodiment, those skilled in the art can change the number of blades of the first fan blade 30 and the second fan blade 40 according to requirements. For example, the number of blades of both the first fan blade 30 and the second fan blade 40 can be set to seven. In another alternative embodiment, the number of blades of the first fan blade 30 can be set to be greater than the number of blades of the second fan blade 40. For example, the number of blades of the first fan blade 30 is set to nine, and the number of blades of the second fan blade 40 is set to seven. In addition, the specific settings of the first fan blade 30 and the second fan blade 40 are not fixed either. In an alternative embodiment, those skilled in the art can change the specific shapes, bending angles, spacing distances and rotation speeds of the first fan blade 30 and the second fan blade 40 according to requirements. For example, the spacing distance between the first fan blade 30 and the second fan blade 40 is set to 60 mm.

[0050] It should also be explained that although in this embodiment, the first fan blade 30 and the second fan blade 40 are introduced in combination with a general household fan, this is not intended to limit the protection scope of the present application. Without departing from the principle of the present application, those skilled in the art can apply the present application to other application scenarios. For example, the first fan blade 30 and the second fan blade 40 can be applied to devices such as humidifiers. At this time, the specific settings of the housing 10, the support rod 60, and the base 70 are not fixed either. In an alternative embodiment, the support rod 60 and the base 70 can be omitted. At this time, the housing 10 can be set to a cylindrical shape, and air inlets and air outlets can be respectively opened on the side and the top of the housing 10. The control board 80 can also be arranged in the housing 10. Of course, when the support rod 60 and the base 70 are provided, the telescopic setting of the support rod 60 can also be omitted.

[0051] Those skilled in the art can understand that the setting of the connection assembly 50 is not fixed either. In an alternative embodiment, the second air guide ring 52 can be omitted. At this time, the clamp 51 is sleeved on the driving assembly 20, and the clamp 51 is directly connected to the first air guide ring 13 through the connecting rod 53. Of course, although four connecting rods 53 are provided in this embodiment, those skilled in the art can set the number of connecting rods 53 to one, two, three, five or more. In addition, although in this embodiment, the settings of the first ventilation hole, the second ventilation hole, and the third ventilation hole on the decorative cover 121 can avoid wind resistance and ensure the air intake of the fan, the specific setting of the decorative cover 121 is not fixed either. In an alternative embodiment, the settings of multiple ventilation holes can be omitted. In another alternative embodiment, when multiple ventilation holes are provided, those skilled in the art can change the number, aperture, or shape of each ventilation hole according to requirements. For example, a plurality of ventilation holes with equal diameters can be evenly opened on the decorative cover 121.

[0052] Those skilled in the art can understand that although some of the embodiments described herein include certain features included in other embodiments rather than other features, the combination of the features of different embodiments means that it is within the scope of the present application and forms different embodiments. For example, in the claims of the present application, any one of the claimed embodiments can be used in any combination.

[0053] So far, the technical solution of the present application has been described in combination with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present application is obviously not limited to these specific embodiments. Without departing from the principle of the present application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present application.

Claims

1. A fan, characterized in that: include: case; A drive assembly, the drive assembly is arranged on the housing, and the drive assembly includes two output shafts; A first fan blade and a second fan blade, wherein the first fan blade and the second fan blade are respectively connected to one of the output shafts, the first fan blade is located at an air outlet side of the second fan blade, and the first fan blade and the second fan blade are spaced apart from each other.

2. The fan according to claim 1, characterized in that The number of blades of the first fan blades is greater than or equal to the number of blades of the second fan blades.

3. The fan according to claim 1, characterized in that: The edge of the first blade is configured to be streamlined; and / or The edge of the second blade is configured to be arc-shaped.

4. The fan according to claim 1, characterized in that: The shell includes an air inlet mesh cover, an air outlet mesh cover and a first air guide ring, and the air inlet mesh cover and the air outlet mesh cover are respectively connected to two end sides of the first air guide ring.

5. The fan according to claim 4, characterized in that: The fan further comprises a connecting component, one end of which is sleeved on the outside of the driving component, and the other end of which is connected to the shell.

6. The fan according to claim 5, characterized in that: The connecting assembly includes a clamp, a second air guide ring and a connecting rod, the clamp is sleeved on the outside of the driving assembly, the second air guide ring is connected to the air inlet mesh cover, and the second air guide ring is sleeved in the first air guide ring, and the clamp and the second air guide ring are connected through a plurality of connecting rods.

7. The fan according to claim 4, characterized in that: The air outlet mesh cover comprises a decorative cover, the decorative cover is located at the center of the air outlet mesh cover, a first ventilation hole, a second ventilation hole and a third ventilation hole are opened on the decorative cover, and the areas of the first ventilation hole, the second ventilation hole and the third ventilation hole decrease in sequence; The second ventilation holes and the third ventilation holes are both arranged in plurality, the first ventilation hole is located at the center of the decorative cover, the plurality of second ventilation holes are arranged around the outside of the plurality of first ventilation holes, and the plurality of third ventilation holes are arranged around the outside of the plurality of second ventilation holes.

8. The fan according to claim 1, characterized in that The spacing distance between the first fan blade and the second fan blade is any value between 35 mm and 100 mm; and / or The rotation speeds of the first fan blade and the second fan blade are both any values ​​between 1000r / min and 1400r / min.

9. The fan according to claim 1, characterized in that: The fan further comprises a support rod and a base, one end of the support rod is connected to the base, and the other end of the support rod is connected to the shell.

10. The fan according to claim 9, characterized in that A control panel is provided on the support rod; and / or The support rod is telescopically arranged.

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