Fan module and fan

Abstract

The utility model relates to the technical field of fans, in particular to a fan module and a fan. The fan module comprises an air driving piece, a first air duct and a second air duct. The second air cylinder is installed at one end of the first air cylinder, and the first air cylinder and the second air cylinder are communicated in the axial direction. The air driving piece is installed in the first air cylinder and comprises a plurality of fan blades distributed on the radial plane of the first air cylinder at intervals, and the fan blades drive air flow to flow from the first air cylinder to the second air cylinder. A plurality of first wind cutting pieces are arranged in the first wind barrel and between the wind driving piece and the second wind barrel, and the first wind cutting pieces are arranged around the axis of the first wind barrel at intervals so as to form a plurality of first rectification channels in a spaced mode. A plurality of second air cutting pieces are arranged in the second air cylinder at intervals around the axis of the second air cylinder, and a plurality of second rectification channels are formed by the second air cutting pieces at intervals. The width of a gap between the end, close to the inner wall face of the first air duct, of each fan blade and the inner wall face of the first air duct is 1-4 mm.

Description

Technical Field

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

[0002] Small fans, such as handheld fans, are commonly used to provide cooling relief during hot summer weather. These small fans, driven by a fan module, deliver powerful, high-speed airflow. These small fans are popular among consumers due to their compact size, light weight, and portability, allowing them to be carried in bags or handheld for easy use.

[0003] Current fan modules increase air velocity by adding an outlet shroud, while also miniaturizing the shroud to accommodate larger blades to increase air volume. The gap between the blades and the shroud can affect fan module performance. If the gap is too small, the blades may interfere with the shroud during high-speed rotation, causing damage and safety issues. If the gap is too large, the blades will be smaller, resulting in insufficient wind force and a tendency for turbulent airflow to form in the gap, affecting wind speed and causing increased noise. Utility Model Content

[0004] The embodiments of the present utility model provide a fan module and a fan to solve the problem in the prior art that the gap setting between the fan blades and the wind cover will affect the performance of the fan module. If the gap is too small, the fan blades may interfere with the wind cover during high-speed rotation, causing damage to the fan blades and bringing safety problems in use; if the gap is too large and the fan blades are small, it will lead to insufficient wind force of the fan blades and it is also easy to form more turbulent airflow at the gap, affecting the wind speed and causing high noise.

[0005] The utility model discloses a fan module, comprising a wind-driving member, a first wind tube, and a second wind tube; the second wind tube is mounted on one end of the first wind tube, and the first wind tube and the second wind tube are both axially connected; the wind-driving member is mounted in the first wind tube, and the wind-driving member comprises a plurality of fan blades spaced apart on a radial surface of the first wind tube, and the fan blades drive airflow from the first wind tube to the second wind tube;

[0006] A plurality of first air cutting blades are arranged in the first air duct between the wind driving member and the second air duct, and the plurality of first air cutting blades are arranged at intervals around the axis of the first air duct to separate a plurality of first rectifying channels; a plurality of second air cutting blades are arranged in the second air duct at intervals around the axis of the second air duct, and the plurality of second air cutting blades separate a plurality of second rectifying channels;

[0007] The width of the gap between the end of the fan blade close to the inner wall of the first air duct and the inner wall of the first air duct is 1 to 4 mm.

[0008] Optionally, the width of the gap between the end of the fan blade close to the inner wall of the first air cylinder and the inner wall of the first air cylinder is 1.5 mm.

[0009] Optionally, the ends of the plurality of first air cutting blades close to the inner wall of the first air duct are tilted in a clockwise or counterclockwise direction; the tilt direction of the plurality of fan blades is opposite to the tilt direction of the first air cutting blades.

[0010] Optionally, the first air cutting blade is arranged obliquely in the axial direction of the first air cylinder; and the plurality of fan blades are arranged in an arc-shaped bend.

[0011] Optionally, the wind-expelling member includes a motor group and a fan blade seat, the motor group is installed in the first air duct, the fan blade seat is sleeved on the motor group, and the fan blades are spaced apart and arranged on the peripheral wall of the fan blade seat.

[0012] Optionally, the second air cutting blade is arranged to be curved in an arc shape in the circumferential direction of the second air cylinder.

[0013] Optionally, the first air cutting blade is curved in an arc shape in the circumferential direction of the first air cylinder, and the bending direction of the first air cutting blade is opposite to the bending direction of the second air cutting blade.

[0014] Optionally, a second connecting base is provided in the second air duct; the axis of the second connecting base coincides with the axis of the second air duct; one end of a plurality of second air cutting blades is connected to the second connecting base, and the other end is connected to the inner wall of the second air duct; the second air cutting blades are recessed toward the first air duct on the side away from the first air duct.

[0015] Optionally, the fan module further includes a rear cover, on which a plurality of spaced wind-cutting strips are provided, and the rear cover is arranged on a side of the first air tube away from the second air tube.

[0016] The utility model also discloses a fan, comprising the fan module as described above.

[0017] Compared with the prior art, the beneficial effect of the fan module provided by the embodiment of the present invention is that: the present invention sets the gap width W1 between the end of the fan blade close to the inner wall of the first air duct and the inner wall of the first air duct to 1~4mm. When the gap W1 is at this width, it can ensure that the fan blade is not likely to interfere with the wind cover during high-speed rotation, avoiding damage to the fan blade and safety issues in use; at the same time, it can make the fan blade as large as possible, increase the wind force of the fan blade, and the width of the gap will not be too large, which can reduce the formation of turbulent airflow at the gap, avoid affecting the wind speed, and reduce noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments, in which:

[0019] Figure 1 This is a schematic diagram of a fan module according to an embodiment of the present invention;

[0020] Figure 2This is another schematic diagram of the fan module according to an embodiment of the present invention;

[0021] Figure 3 This is an exploded schematic diagram of the fan module according to an embodiment of the present invention;

[0022] Figure 4 This is another exploded schematic diagram of the fan module according to an embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the first air duct and the wind-dispelling member of an embodiment of the present utility model;

[0024] Figure 6 yes Figure 5 A partial enlarged view of part A;

[0025] Figure 7 This is another schematic diagram of the first air duct and the wind-dispelling member of an embodiment of the present utility model;

[0026] Figure 8 This is a schematic diagram of the first air duct of an embodiment of the present utility model;

[0027] Figure 9 This is another schematic diagram of the first air duct of an embodiment of the present utility model;

[0028] Figure 10 This is another schematic diagram of the first air duct of an embodiment of the present utility model;

[0029] Figure 11 It is a schematic diagram of the second air duct of the embodiment of the present utility model;

[0030] Figure 12 This is another schematic diagram of the second air duct of the embodiment of the utility model;

[0031] Figure 13 This is another schematic diagram of the second air duct in an embodiment of the present utility model.

[0032] The reference numerals in the figures are:

[0033] 1. Wind-repelling member; 11. Fan blade seat; 111. Fan blade; 12. Motor unit; 13. Circuit board; 2. First air duct; 21. First wind-cutting blade; 22. First rectifying channel; 23. First connecting base; 24. Fitting edge; 23. Second air duct; 3. Second air duct; 31. Second wind-cutting blade; 32. Second rectifying channel; 33. Second connecting base; 331. First concave cavity; 34. Fitting groove; 4. Rear cover; 41. Wind-cutting strip. DETAILED DESCRIPTION

[0034] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. Now, in conjunction with the accompanying drawings, a detailed description of the preferred embodiments of the present utility model will be given.

[0035] The present invention provides a fan module. Figures 1 to 6 As shown, the fan module includes a wind-expelling component 1, a first wind tube 2 and a second wind tube 3; the second wind tube 3 is installed on one end of the first wind tube 2, and the first wind tube 2 and the second wind tube 3 are both axially connected; the wind-expelling component 1 is installed in the first wind tube 2, and the wind-expelling component 1 includes a plurality of fan blades 111 spaced apart on the radial surface of the first wind tube 2, and the fan blades 111 drive the airflow from the first wind tube 2 to the second wind tube 3.

[0036] A plurality of first wind-cutting blades 21 are provided within the first air duct 2, between the wind-displacing element 1 and the second air duct 3. The plurality of first wind-cutting blades 21 are arranged at intervals around the axis of the first air duct 2 to define a plurality of first flow-rectifying channels 22. A plurality of second wind-cutting blades 31 are arranged at intervals around the axis of the second air duct 3 within the second air duct 3 to define a plurality of second flow-rectifying channels 32. The width of the gap between the end of the fan blade 111 closest to the inner wall of the first air duct 2 and the inner wall of the first air duct 2 is 1 to 4 mm.

[0037] The utility model sets the gap width W1 between the end of the fan blade 111 close to the inner wall of the first air duct 2 and the inner wall of the first air duct 2 to 1-4 mm. When the gap W1 is within this width, it can ensure that the fan blade 111 is not likely to interfere with the wind cover during high-speed rotation, thereby avoiding damage to the fan blade 111 and safety issues in use; at the same time, it can make the fan blade 111 as large as possible, thereby increasing the wind force of the fan blade 111, and the width of the gap will not be too large, thereby reducing the formation of turbulent airflow at the gap, avoiding affecting the wind speed, and reducing noise.

[0038] Specifically, the fan module is also provided with a first air duct 2 and a second air duct 3. Among them, a first air cutter 21 is provided in the first air duct 2, and the first air cutter 21 can preliminarily rectify the airflow generated by the fan blades 111, that is, after the fan blades 111 drive the airflow to generate a messy and scattered state, it is blown to the first rectifying channel 22 formed by multiple first air cutters 21 and then cut and diverted into multiple relatively concentrated and orderly airflows. Furthermore, a second air cutter 31 is provided on the second air duct 3, and the airflow passing through the first rectifying channel 22 enters the second rectifying channel 32 again, and the airflow is cut and diverted again, making the airflow more concentrated and orderly. The first rectifying channel 22 and the second rectifying channel 32 can provide a flow stroke of sufficient length for the airflow. On this basis, after two rectifications, the airflow is more concentrated and the wind force is more sufficient, which can provide users with a cooler use experience.

[0039] Specifically, the gap width W1 between the end of the fan blade 111 close to the inner wall of the first air duct 2 and the inner wall of the first air duct 2 can be set to any one of 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, and 4mm. Preferably, the gap width W1 between the end of the fan blade 111 close to the inner wall of the first air duct 2 and the inner wall of the first air duct 2 is 1.5mm. The gap width W1 is 1.5mm, which is within the safety range of 1 to 4mm. It can effectively reduce the risk of the fan blade 111 colliding or interfering with the inner wall of the first air duct 2 when rotating at high speed, thereby protecting the fan blade 111 from damage and extending its service life. At the same time, the gap width of 1.5mm can make the size of the fan blade 111 relatively large, which helps to increase the wind output of the fan blade 111. Larger fan blades 111 can push more air, thereby generating stronger wind force. Moreover, the smaller gap width W1 of 1.5mm helps reduce the turbulence of the airflow at the gap, thereby reducing noise and improving the stability of the airflow. It can ensure that the airflow remains in a relatively orderly state when passing through the first air duct 2, and helps the airflow to be more concentrated when passing through the first air cutting blade 21. This can improve the rectification efficiency of the airflow, making the airflow more orderly when entering the second air duct 3, further improving the concentration and output efficiency of the wind force. Through such wind output and airflow rectification optimization, a cooler and more comfortable user experience can be provided to the user. The smaller gap width helps reduce noise and makes the fan run quieter.

[0040] Further integration Figures 7 to 10 As shown, multiple first air-cutting blades 21 are tilted clockwise or counterclockwise at one end near the inner wall of the first air duct 2; the tilt of multiple blades 111 is opposite to that of the first air-cutting blades 21. The tilt of the blades 111 is opposite to that of the first air-cutting blades 21, allowing more airflow to be driven into the first rectifying channel 22 when the blades 111 rotate. Specifically, the tilt of the first air-cutting blades 21 in one direction can guide the airflow to blow out at a specific angle, while the tilt of the blades 111 in the opposite direction to the first air-cutting blades 21 can further adjust the direction of the airflow, making it more concentrated and directional. The airflow generated by the blades 111 is cut and redirected when passing through the first air-cutting blades 21 due to the tilt of the first air-cutting blades 21. This design can enhance the rectifying effect of the airflow and make the airflow more orderly. By controlling the tilt of the blades 111 and the first air-cutting blades 21, the turbulence and vortex of the airflow inside the first air duct 2 can be reduced, thereby reducing noise and improving the efficiency of wind transmission.

[0041] More specifically, in one embodiment, based on the side where the second air duct 3 is located, the first air cutting blade 21 is tilted in the counterclockwise direction, and the fan blade 111 is tilted in the clockwise direction.

[0042] Furthermore, the first air-cutting blades 21 are arranged obliquely in the axial direction of the first air duct 2, that is, the upper and lower sides of the first air-cutting blades 21 are staggered, which can guide the airflow and guide the airflow to the second air duct 33 more quickly and more concentratedly. The multiple blades 111 are arranged in an arc-shaped bend. The axial tilting setting of the first air-cutting blades 21 can guide the airflow to flow in a specific direction, enhance the directionality of the airflow, make the wind force more concentrated, and reduce lateral loss. The arc-shaped bending design of the blades 111 can increase the area of ​​contact between the blades 111 and the air, thereby generating greater wind force at the same speed and improving the efficiency of the fan. The arc-shaped curved blades 111 can push the airflow more effectively, and combined with the inclined first air-cutting blades 21, can further rectify the airflow, reduce the turbulence and vortex of the airflow, and reduce noise. The design of the curved fan blades 111 and the inclined first wind-cutting blades 21 helps to reduce the turbulence and eddy currents formed in the airflow inside the first air duct 2, which helps to reduce energy loss and improve the transmission efficiency of wind power. At the same time, the curved fan blades 111 can distribute the wind power more evenly, and the inclined first wind-cutting blades 21 can further adjust the direction of the airflow, making the wind power more uniform when output.

[0043] Specifically, if Figure 3 As shown, the wind-expelling part 1 includes a motor group 12 and a fan blade seat 11. The motor group 12 is installed in the first air duct 2, the fan blade seat 11 is sleeved on the motor group 12, and the fan blades 111 are spaced apart on the peripheral wall of the fan blade seat 11. The motor group 12 is installed in the first air duct 2, and the fan blade seat 11 is sleeved on the motor group 12. This structural design makes the entire wind-expelling part 1 more compact, saves space, and is easy to install and maintain. The motor group 12 directly drives the fan blade seat 11, reduces the transmission links, improves the force transmission efficiency, and thus improves the overall efficiency of the fan module. The fan blades 111 are spaced apart on the peripheral wall of the fan blade seat 11, which can ensure the uniform distribution and uniform flow of airflow, reduce the mutual interference of airflow between the fan blades 111, and improve the output efficiency of wind power. The motor group 12 generally includes a stator and a rotor. The fan blade seat 11 is sleeved on the rotor. The rotation of the rotor drives the fan blade seat 11 to rotate. The specific setting of the motor group 12 can adopt conventional technology and will not be repeated here.

[0044] On the other hand, the second air cutting blades 31 are arranged in an arc shape in the circumferential direction of the second air duct 3. The arc-shaped second air cutting blades 31 can more effectively guide and rectify the airflow passing through the second air duct 3, making the airflow more orderly and concentrated. The arc-shaped design of the second air cutting blades 31 helps to concentrate the airflow, so that the wind force is more concentrated in a specific direction. The arc-shaped second air cutting blades 31 can also reduce turbulence and eddy currents in the airflow inside the second air duct 3, thereby reducing noise and improving the transmission efficiency of wind force.

[0045] Specifically, the first air cutting blade 21 is arranged to be curved in an arc shape in the circumferential direction of the first air duct 2, and the curvature direction of the first air cutting blade 21 is opposite to the curvature direction of the second air cutting blade 31. The opposite curvature directions of the first air cutting blade 21 and the second air cutting blade 31 can perform bidirectional rectification on the airflow, so that the airflow is more orderly and concentrated when passing through the second air duct 3, thereby improving the wind transmission efficiency. This design can optimize the dynamic characteristics of the airflow, making the airflow flow smoother inside the second air duct 3 and reducing energy loss. The orderly airflow flow helps to reduce turbulence and eddy currents, thereby reducing noise and providing a quieter operating environment.

[0046] Further, if Figures 11 to 13 As shown, a second connecting base 33 is provided in the second air duct 3; the axis of the second connecting base 33 coincides with the axis of the second air duct 3; one end of a plurality of second air cutting blades 31 is connected to the second connecting base 33, and the other end is connected to the inner wall of the second air duct 3; the second air cutting blades 31 are recessed in the direction of the first air duct 2 on the side away from the first air duct 2. The axis of the second connecting base 33 coincides with the axis of the second air duct 3. This design can ensure the stable installation of the second air cutting blades 31 and reduce vibration and noise caused by improper installation. The recessed setting of the second air cutting blades 31 in the direction of the first air duct 2 on the side away from the first air duct 2 can concentrate the airflow, so that the wind force is concentrated in the direction of the axis, thereby improving the output efficiency of the wind force.

[0047] The second air cutting blades 31 are connected at their ends to the second connecting base 33 and the inner wall of the second air duct 3, defining a plurality of second rectifying channels 32. The second connecting base 33 can be cylindrical to reduce wind resistance while ensuring that the sidewalls of the second connecting base 33 are equidistant from the inner wall of the second air duct 3.

[0048] The top surface of the second connecting base 33 is lower than the height of the side of the second air tube 3 away from the first air tube 2. The top surface of the second connecting base 33 is lower than the side of the second air tube 3, which helps to form a complete airflow outlet surface on the air outlet surface of the second air tube 3. Before the airflow is blown out of the second air tube 3, the entire air outlet surface is covered, avoiding the problem of insufficient wind force in the middle area of ​​the air outlet surface due to the obstruction of the second connecting base 33, and making the air volume distribution more uniform throughout the entire blowing area.

[0049] The second connecting base 33 is provided with a first concave cavity 331, which is open on a side near the first air duct 2. This solution provides the first concave cavity 331 on the second connecting base 33 to reduce the weight of the second air duct 3. Specifically, the first concave cavity 331 is a cylindrical cavity, and the second connecting base 33 is cylindrical in shape. The first concave cavity 331 is connected to the first connecting base 33, which can seal the first concave cavity 331 to a certain extent, preventing airflow from flowing into the first concave cavity 331 when flowing to the second air duct 3, causing airflow turbulence, affecting the orderly flow of airflow, and increasing noise.

[0050] Furthermore, in the radial projection of the first air duct 2 and the second air duct 3, there is no gap between the second air cutting blade 31 and the first air cutting blade 21. In this solution, in the radial projection of the first air duct 2 and the second air duct 3, there is no gap between the second air cutting blade 31 and the first air cutting blade 21. After exiting the first rectifying channel 22, the airflow directly enters the second rectifying channel 32, avoiding disturbance of the airflow at the gap and ensuring orderly and stable airflow.

[0051] A first connecting base 23 is provided in the first air duct 2; the axis of the first connecting base 23 coincides with the axis of the first air duct 2; a plurality of first air cutting blades 21 are connected to the first connecting base 23 at one end and to the inner wall of the first air duct 2 at the other end; the motor unit 12 is mounted on the side of the first connecting base 23 facing away from the second air duct 3. The provision of the first connecting base 23 facilitates the connection of the first air cutting blades 21.

[0052] Furthermore, the wind-expelling component 1 includes a connecting wire (not shown), and a wire groove (not shown) is provided on the edge of one side of the first air tube 2 facing the second air tube 3 or on the edge of the one side of the second air tube 3 facing the first air tube 2. The connecting wire passes through the first rectifying channel 22 from the side of the first wind-cutting blade 21 facing away from the second air tube 3, and is led out from the wire groove to the outside of the first air tube 2 and the second air tube 3. Through the wire groove and the original first rectifying channel 22, the connecting wire can be conveniently led to the outside of the first air tube 2 and the second air tube 3. Specifically, the connecting wire is electrically connected to the circuit board 13 of the motor group 12, and the stator of the motor group 12 is electrically connected to the circuit board 13. After being led out, the connecting wire is further electrically connected to the main circuit board 13, which will not be repeated here.

[0053] Further, if Figure 9 and Figure 13As shown, one of the first and second air ducts 2 and 3 has an engaging groove 34 formed around its edge facing the other, and the other has an engaging edge 24 formed around its edge facing the first and second air ducts 3. The engaging edge 24 is embedded in the engaging groove 34. The engaging groove 231 and the engaging edge 24 improve the ease of assembly and the stability of installation between the first and second air ducts 2 and 3. The first and second air ducts 2 and 3 can be further bonded together using glue.

[0054] Furthermore, the fan module includes a rear cover 4, which is provided with a plurality of spaced-apart wind-cutting strips 41. The rear cover 4 is provided on a side of the first air duct 2 away from the second air duct 3. The wind-cutting strips 41 on the rear cover 4 can initially rectify the airflow flowing into the first air duct 2, making the airflow more orderly, reducing the turbulence of the airflow before entering the fan blades 111, improving the wind transmission efficiency, reducing the noise generated by the turbulent airflow, and providing a quieter user experience.

[0055] The utility model also discloses a fan, comprising the fan module as described above. The fan has the fan module as described above and has the same technical effects as the fan module, which will not be described in detail here.

[0056] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Those skilled in the art may modify the technical solutions described in the above embodiments, or make equivalent replacements for some of the technical features therein; and all these modifications and replacements should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A fan module, characterized in that: The invention comprises a wind-driving member, a first wind tube, and a second wind tube; the second wind tube is mounted on one end of the first wind tube, and the first wind tube and the second wind tube are both axially connected; the wind-driving member is mounted in the first wind tube, and the wind-driving member includes a plurality of fan blades spaced apart on a radial surface of the first wind tube, and the fan blades drive airflow from the first wind tube to the second wind tube; A plurality of first air cutting blades are provided in the first air duct between the wind driving member and the second air duct, and the plurality of first air cutting blades are arranged at intervals around the axis of the first air duct to separate a plurality of first rectifying channels; a plurality of second air cutting blades are arranged at intervals around the axis of the second air duct in the second air duct, and the plurality of second air cutting blades separate a plurality of second rectifying channels; The width of the gap between the end of the fan blade close to the inner wall of the first air duct and the inner wall of the first air duct is 1 to 4 mm.

2. The fan module according to claim 1, wherein: The width of the gap between the end of the fan blade close to the inner wall of the first air duct and the inner wall of the first air duct is 1.5 mm.

3. The fan module according to claim 1, wherein: The ends of the plurality of first air cutting blades close to the inner wall of the first air duct are tilted in a clockwise or counterclockwise direction; the tilting direction of the plurality of fan blades is opposite to the tilting direction of the first air cutting blades.

4. The fan module according to claim 3, characterized in that: The first air cutting blade is tilted in the axial direction of the first air tube; and the plurality of fan blades are curved in an arc shape.

5. The fan module according to any one of claims 1 to 4, characterized in that: The wind-driving component includes a motor group and a fan blade seat. The motor group is installed in the first air duct. The fan blade seat is sleeved on the motor group. The fan blades are spaced apart and arranged on the peripheral wall of the fan blade seat.

6. The fan module according to claim 3, wherein: The second air cutting blade is arranged to be curved in an arc shape in the circumferential direction of the second air cylinder.

7. The fan module according to claim 6, characterized in that: The first air cutting blade is curved in an arc shape in the circumferential direction of the first air cylinder, and the curvature direction of the first air cutting blade is opposite to the curvature direction of the second air cutting blade.

8. The fan module according to any one of claims 1 to 4, characterized in that: A second connecting base is provided in the second air duct; the axis of the second connecting base coincides with the axis of the second air duct; one end of a plurality of second air cutting blades is connected to the second connecting base, and the other end is connected to the inner wall of the second air duct; the second air cutting blades are recessed toward the first air duct on the side away from the first air duct.

9. The fan module according to any one of claims 1 to 4, characterized in that: The fan module further comprises a rear cover, on which a plurality of spaced wind-cutting strips are provided. The rear cover is arranged on a side of the first air tube away from the second air tube.

10. A fan, characterized in that: The invention comprises a fan module according to any one of claims 1 to 9.

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