Fan module and blowing device

Abstract

The invention discloses a fan module and a blowing device. The fan module comprises a shell; the connecting piece is arranged in the shell, and an air duct is formed in the connecting piece; the assembling base is connected to the connecting piece; the fan assembly is connected to the assembling base in a sleeving mode, and the fan assembly is connected with the assembling base through a rotating shaft. The fan assembly is connected with the assembling base, and the assembling base and the fan assembly are connected in two modes. Firstly, a part of structure of the fan assembly is installed on the assembling base in a sleeving mode; and secondly, part of the structure of the fan assembly is further connected with the assembling base through a rotating shaft. According to the fan module provided by the invention, through the multiplex connection mode of the fan assembly and the assembly base, not only is the connection stability of the fan assembly and the assembly base improved, but also the space occupied by the fan assembly in the shell can be greatly reduced through the composite connection mode, so that the size of the fan module can be further reduced.

Description

Technical Field

[0001] The present application relates to the field of fans, and in particular to a fan module and a blowing device. Background Art

[0002] In the hot summer, fans have become a must-have item for people to get rid of the heat. With people's demand for convenient use, lighter and more portable fans are becoming more and more popular.

[0003] In the prior art, a fan is provided with a fan motor and fan blades, wherein the fan motor is fixed in a fan housing, and the fan motor is connected to the fan blades via a rotating shaft. The inventor of the present invention found in research that the prior art method of first fixing the fan motor and then connecting the fan motor to the fan blades would occupy space in the fan housing, resulting in a larger fan volume. Summary of the invention

[0004] The purpose of the present application is to provide a fan module and a blowing device that can reduce the volume of the fan assembly in the fan housing through reasonable layout.

[0005] The present application provides a fan module, including:

[0006] case;

[0007] A connecting piece, the connecting piece is arranged in the housing, and an air duct is provided on the connecting piece;

[0008] An assembly base, the assembly base being connected to the connecting member;

[0009] A fan assembly is sleeved and connected to the assembly base, and the fan assembly is connected to the assembly base through a rotating shaft.

[0010] Optionally, the assembly base is detachably connected to the connecting member, and the assembly base is made of metal; and / or,

[0011] A flexible sleeve is sleeved on the shell, and annular protrusions and dot-shaped protrusions are alternately arranged on the outside of the flexible sleeve.

[0012] Optionally, the connecting member is provided with a plurality of first fixing holes, the assembly base is correspondingly provided with a plurality of second fixing holes, and the plurality of first fixing holes and the plurality of second fixing holes are connected by screws; and / or,

[0013] The connecting piece is provided with a positioning groove, and one end of the assembly base connected with the connecting piece is arranged in the positioning groove.

[0014] Optionally, the connecting member comprises: a connecting ring and a plurality of connecting plates, the plurality of connecting plates are arranged around the connecting ring, one end of each of the plurality of connecting plates is connected to the inner surface of the shell, the other end of each of the connecting plates is connected to the connecting ring, and two adjacent connecting plates of the plurality of connecting plates enclose each other to form the air duct; and / or,

[0015] The end of each connecting plate facing the fan assembly is bent and extended toward the fan assembly to form an air guide plate, and the bending direction of the air guide plate is opposite to the rotation direction of the fan assembly.

[0016] Optionally, the air guide plate is disposed between the fan assembly and the housing, and the air guide plate is connected to the inner surface of the housing, and there is a gap between the air guide plate and the fan assembly; and / or,

[0017] The connecting ring includes: a connecting outer ring and a connecting inner ring, the connecting inner ring is arranged inside the connecting outer ring, the connecting outer ring is connected to the multiple connecting plates, the assembly base is connected to the connecting inner ring, and the thickness of the connecting outer ring is greater than the thickness of the connecting inner ring.

[0018] Optionally, the fan assembly includes: a fan motor and fan blades, the fan motor is sleeved and connected to the assembly base, and the fan motor is connected to the assembly base via a rotating shaft, and the fan blades are connected to the assembly base via a rotating shaft.

[0019] Optionally, the fan motor includes: a coil, a magnetic ring and a motor housing, the coil is sleeved on the assembly base, the magnetic ring is sleeved on the coil, the motor housing is sleeved on the magnetic ring, and the motor housing is fixedly connected to the rotating shaft so that the fan housing drives the rotating shaft to rotate.

[0020] Optionally, the coil is interference-fitted with the assembly base, the magnetic ring is magnetically coupled to the coil, and the motor housing is interference-fitted with the rotating shaft; and / or,

[0021] A limit stop edge is arranged inside the motor housing, and the limit stop edge abuts against one end of the magnetic ring; and / or,

[0022] The ratio of the inner diameter of the shell to the maximum diameter of the fan blade is in the range of 1.01-1.15.

[0023] Optionally, the fan blades include: a hub and a plurality of blades, the plurality of blades are arranged around the hub, and the hub is connected to the rotating shaft; and,

[0024] Each of the plurality of blades comprises a first end and a second end opposite to the first end, the length of the first end is greater than the length of the second end, each of the blades is provided with a blade edge, the thickness of each blade gradually increases from the first end to the blade edge, and the thickness of each blade gradually decreases from the blade edge to the second end; and / or,

[0025] The hub comprises: a top surface, a bottom surface and a side edge, the cross-sectional area of ​​the bottom surface is larger than the cross-sectional area of ​​the top surface, and there is a smooth transition between the top surface and the side edge.

[0026] Optionally, a length ratio of the first end to the second end is in a range of 1.4-1.9.

[0027] Optionally, the assembly base includes: a base and a connecting column, the base is connected to the connecting member, the connecting column is connected to the base, and the fan assembly is sleeved and connected to the connecting column.

[0028] Optionally, the connecting column comprises: a first column and a second column, the diameter of the first column is larger than the diameter of the second column, the first column is connected to the base, the second column is connected to the first column, and the fan assembly is sleeved and connected to the second column; and / or,

[0029] The connecting column is provided with a connecting hole, and the two ends of the connecting hole are respectively provided with a first bearing and a second bearing, the rotating shaft is inserted into and passes through the first bearing and the second bearing, and the end of the rotating shaft passing through the second bearing is provided with a clamping groove, and the clamping groove is connected with a retaining spring; and / or,

[0030] The base comprises: a first protruding portion, a second protruding portion and a third protruding portion, wherein inner arc notches are formed between the first protruding portion, the second protruding portion and the third protruding portion, and an outer arc piece is provided between the second protruding portion and the third protruding portion.

[0031] Optionally, a connecting platform is provided at the position where the fan assembly is connected to the rotating shaft, the rotating shaft passes through the connecting platform and is interference fit with the connecting platform, and one end of the connecting platform facing the first bearing abuts against the first inner ring of the first bearing; and / or,

[0032] A shaft sleeve is arranged between the second bearing and the retaining spring. The shaft sleeve is sleeved on the rotating shaft. One end of the shaft sleeve facing the second rotating shaft abuts against the second inner ring of the second bearing.

[0033] Optionally, a PCB circuit board is arranged between the base and the fan assembly, and the PCB circuit board is sleeved on the connecting column.

[0034] Optionally, a first wiring hole is provided on the connecting member, a second wiring hole is provided on the base corresponding to the position of the first wiring hole, and the thickness of the base at the position of the second wiring hole is smaller than the thickness at other positions of the base.

[0035] To achieve the purpose of the present application, an embodiment of the present application further provides a blowing device, which is assembled with a fan module described in any one of the above items.

[0036] The beneficial effects of the embodiments of the present application are: the connecting piece is arranged in the shell, the assembly base is connected to the connecting piece, the fan assembly is connected to the assembly base, and the assembly base and the fan assembly are connected in two ways. First, part of the structure of the fan assembly is sleeved and installed on the assembly base; second, part of the structure of the fan assembly is also connected to the assembly base through a rotating shaft. The multiplexed connection method between the fan assembly and the assembly base not only increases the connection stability between the fan assembly and the assembly base, but also, this composite connection method can greatly reduce the space occupied by the fan assembly in the shell, so that the volume of the fan module can be further reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0038] Figure 1 This is a schematic diagram of the overall structure of a fan module according to a specific embodiment of the present application;

[0039] Figure 2 This is a schematic diagram of the exploded structure of a fan module according to a specific embodiment of the present application;

[0040] Figure 3 A cross-sectional view of a fan module according to a specific embodiment of the present application;

[0041] Figure 4 This is a schematic structural diagram of a shell from a first perspective of a specific embodiment of the present application;

[0042] Figure 5 This is a schematic structural diagram of a shell from a second viewing angle according to a specific embodiment of the present application;

[0043] Figure 6 This is a schematic diagram of the structure of a motor housing according to a specific embodiment of the present application;

[0044] Figure 7 This is a schematic structural diagram of a fan blade from a first perspective of a specific embodiment of the present application;

[0045] Figure 8 This is a schematic structural diagram of a fan blade from a second viewing angle according to a specific embodiment of the present application;

[0046] Fig. 9 This is a structural schematic diagram of an assembly base from a first perspective of a specific embodiment of the present application;

[0047] Fig.10 This is a structural schematic diagram of an assembly base from a second perspective of a specific embodiment of the present application. DETAILED DESCRIPTION

[0048] In order to facilitate the understanding of the present invention, the present invention is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element, or there can be one or more centered elements therebetween. When an element is described as "connected to" another element, it can be directly connected to the other element, or there can be one or more centered elements therebetween. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this specification are for illustrative purposes only.

[0049] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in this specification and in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0050] Example 1

[0051] See also Figure 1 and Figure 2 , Figure 1 is a schematic diagram of the overall structure of the fan module of this embodiment; Figure 2 Schematic diagram of the exploded structure of the fan module of this embodiment.

[0052] like Figure 1 and Figure 2 As shown, a fan module comprises: a housing 1, a connecting member 2, an assembly base 3 and a fan assembly 4. The connecting member 2 is arranged in the housing 1, and an air duct is opened on the connecting member 2; the assembly base 3 is connected to the connecting member 2; the fan assembly 4 is sleeved and connected to the assembly base 3, and the fan assembly 4 is connected to the assembly base 3 through a rotating shaft 414.

[0053] In the above embodiment, the connector 2 is arranged in the housing 1, the assembly base 3 is connected to the connector 2, the fan assembly 4 is connected to the assembly base 3, and the assembly base 3 and the fan assembly 4 are connected in two ways. First, a part of the structure of the fan assembly 4 is sleeved and installed on the assembly base 3; second, a part of the structure of the fan assembly 4 is also connected to the assembly base 3 through the rotating shaft 414. The multiplexed connection method between the fan assembly 4 and the assembly base 3 not only increases the connection stability between the fan assembly 4 and the assembly base 3, but also, this composite connection method can greatly reduce the space occupied by the fan assembly 4 in the housing 1, so that the volume of the fan module can be further reduced.

[0054] In this embodiment, the housing 1 is cylindrical, and a cylindrical air cavity 11 is provided inside the cylinder. However, the shape of the housing 1 is not limited thereto, and in some embodiments, the shape of the housing 1 can be a triangle, a quadrilateral, a pentagon, other polygons, or other regular shapes, depending on the specific application scenario.

[0055] See also Figure 3 , Figure 3 is a cross-sectional view of the fan module of this embodiment.

[0056] like Figure 3 As shown, in this embodiment, the housing 1 is provided with an air cavity 11 that runs through the upper and lower surfaces thereof, and the air cavity 11 is configured in a cylindrical shape. However, the shape of the air cavity 11 is not limited thereto, and in some embodiments, the shape of the air cavity 11 can be star-shaped, heart-shaped, racetrack-shaped, or polygonal, depending on the specific application scenario.

[0057] See also Figure 4 and Figure 5 , Figure 4 This is a schematic structural diagram of the housing of this embodiment from a first viewing angle; Figure 5 Schematic diagram of the structure of the shell of this embodiment from a second viewing angle.

[0058] like Figure 4 and Figure 5 As shown, the connecting member 2 includes: a connecting ring 21 and a plurality of connecting plates 22, the plurality of connecting plates 22 are arranged around the connecting ring 21, one end of each of the plurality of connecting plates 22 is connected to the inner surface of the shell 1, the other end of each of the connecting plates 22 is connected to the connecting ring 21, and two adjacent connecting plates 22 among the plurality of connecting plates 22 enclose each other to form an air duct.

[0059] The arrangement of the plurality of connection plates 22 enables the connection ring 21 to be suspended in the housing 1 , and every two connection plates 22 among the plurality of connection plates 22 enclose an air duct, enabling the airflow driven by the fan assembly 4 to flow through the air duct.

[0060] In this embodiment, the number of the connecting plates 22 is 7. However, the number of the connecting plates 22 is not limited thereto, and according to different specific application scenarios, in some embodiments, the number of the connecting plates 22 can be 2, 3, 4, 5, 6, 8 or more.

[0061] In some embodiments, the connecting member 2 is a plate disposed inside the housing 1 , the shape of the plate is the same as the shape of the internal cavity of the housing 1 , and a plurality of holes for airflow are opened on the plate.

[0062] The connector 2 and the housing 1 are manufactured by an integrated molding process. However, the manufacturing process of the connector 2 and the housing 1 is not limited thereto. Depending on the specific application scenario, in some embodiments, the connector 2 and the housing 1 can be processed and molded separately, and then assembled and connected by gluing, clamping, riveting or screwing.

[0063] In some embodiments, the connecting ring 21 includes: an outer connecting ring 211 and an inner connecting ring 212, the inner connecting ring 212 is arranged inside the outer connecting ring 211, the outer connecting ring 211 is connected to a plurality of connecting plates 22, the assembly base 3 is connected to the inner connecting ring 212, and the thickness of the outer connecting ring 211 is greater than the thickness of the inner connecting ring 212. It should be pointed out that the thickness in this embodiment refers to: the height in the vertical direction perpendicular to the horizontal direction.

[0064] The thickness of the connecting outer ring 211 is greater than the thickness of the connecting inner ring 212, so that when the connecting inner ring 212 is set in the connecting outer ring 211, there is still spare space in the connecting outer ring 211. The spare space can be used to set the assembly base 3, thereby improving the space utilization of the fan module.

[0065] The end of each of the plurality of connecting plates 22 facing the fan assembly 4 is bent and extended toward the fan assembly 4 to form an air guide plate 23 . The bending direction of the air guide plate 23 is opposite to the rotation direction of the fan assembly 4 .

[0066] Specifically, each of the plurality of connecting plates 22 is formed with an air guide plate 23 at the end facing the fan blade 42 in the fan assembly 4, and the bending direction of the air guide plate 23 is opposite to the rotation direction of the fan blade 42. In this embodiment, the bending direction of the air guide plate 23 is opposite to the rotation direction of the fan blade 42, which means that the bending direction of the air guide plate 23 is opposite to the rotation direction of the fan blade 42, and is not limited to the specific embodiment in which the bending direction of the air guide plate 23 is 180° to the rotation direction of the fan blade 42. In some embodiments, when the bending angle of the air guide plate 23 is an obtuse angle to the rotation direction of the fan blade 42, it is also within the opposite coverage defined in this embodiment.

[0067] The bending direction of the air guide plate 23 is opposite to the rotation direction of the fan blades 42. When the fan blades 42 rotate, the airflow will be driven to rotate in the same direction. At this time, the bending direction of the air guide plate 23 is opposite to the rotation direction of the airflow. When the airflow rotates, it contacts and collides with the curved part of the air guide plate 23. Since the directions are opposite, the angle between the airflow and the curved part of the air guide plate 23 is greater than 90 degrees. The airflow contacts the air guide plate 23 at a larger angle, which can reduce the kinetic energy loss of the airflow contacting the air guide plate 23. During the contact process at a larger angle, the air guide plate 23 has an obvious guiding effect on the airflow, with less energy loss, which greatly improves the air outlet efficiency.

[0068] In some embodiments, the air guide plate 23 is disposed between the fan assembly 4 and the housing 1 , and the air guide plate 23 is connected to the inner surface of the housing 1 , with a gap between the air guide plate 23 and the fan assembly 4 .

[0069] Specifically, the air guide plate 23 is disposed between the fan motor 41 and the housing 1 , and a gap is provided between the air guide plate 23 and the fan motor 41 .

[0070] In some embodiments, the air guide plate 23 is disposed between the hub 421 of the fan blade 42 and the housing 1 , and a gap is provided between the air guide plate 23 and the hub 421 .

[0071] The air guide plate 23 is arranged between the fan blades 42 and the housing 1, and there is a gap between the air guide plate 23 and the fan blades 42. The gap between the air guide plate 23 and the fan blades 42 is such that after the airflow contacts the air guide plate 23, part of the airflow flows toward the air outlet along the guidance of the air guide plate 23, and the other part of the airflow flows to the next air guide plate 23 through the gap between the air guide plate 23 and the fan blades 42. The gap between the air guide plate 23 and the fan blades 42 provides a channel for the air pressure balance between the air guide plates 23, thereby avoiding the problem that the air pressure on both sides of the air guide plate 23 is inconsistent due to the complete closure of the air guide plate 23, thereby affecting the air outlet efficiency of the fan module.

[0072] The assembly base 3 is detachably connected to the connecting member 2 , and the assembly base 3 is made of metal.

[0073] The connector 2 is provided with a plurality of first fixing holes 215, and the assembly base 3 is correspondingly provided with a plurality of second fixing holes 311, and the plurality of first fixing holes 215 and the plurality of second fixing holes 311 are connected by screws. The assembly base 3 can be disassembled by screw connection, and the assembly base 3 can be conveniently replaced and repaired.

[0074] However, the detachable connection between the connector 2 and the assembly base 3 is not limited to screw connection. According to different specific application scenarios, in some embodiments, the connector 2 and the assembly base 3 can also be connected by a buckle or lock connection.

[0075] A positioning groove 214 is formed on the connecting member 2 , and one end of the assembly base 3 connected to the connecting member 2 is arranged in the positioning groove 214 .

[0076] The positioning groove 214 is provided on the connecting inner ring 212 of the connecting member 2, and the setting of the positioning groove 214 enables the base 31 in the assembly base 3 to be embedded in the positioning groove 214. This method facilitates the positioning and alignment of the first fixing hole 215 and the second fixing hole 311, and optimizes the assembly process. At the same time, since the assembly base 3 needs to withstand the torque generated by the fan assembly 4 when the fan assembly 4 rotates, and the magnitude of the torque is proportional to the rotation speed of the fan assembly 4. Therefore, when the generated torque is borne by the screw, the strength requirements of the screw are relatively high, and at the same time, it will affect the service life of the screw. The setting of the positioning groove 214 can deflect and stop the assembly base 3 through the positioning groove 214, which is equivalent to sharing a part of the torque by the positioning groove 214, greatly reducing the loss of the screw and extending the service life of the fan module.

[0077] Specifically, the positioning groove 214 is configured as a rounded triangle, and the shape of the base 31 of the corresponding assembly base 3 is also configured as a rounded triangle that matches the positioning groove 214, and the edges of the two adjacent rounded corners of the positioning groove 214 are in an inner arc shape, and the edges of the two adjacent rounded corners of the corresponding assembly base 3 are also configured as an inner arc shape. The inner arc structure makes the edge of the positioning groove 214 that contacts the assembly base 3 in an arc shape. When the fan assembly 4 rotates, the force of the assembly base 3 acting on the positioning groove 214 is decomposed in different directions of the arc edge, rather than concentrated in the same direction, which further reduces the force strength of the edge of the positioning groove 214 and improves the service life of the fan assembly 4.

[0078] In some embodiments, the shape of the positioning groove 214 and the corresponding shape of the assembly base 3 are not limited thereto. Depending on the specific application scenario, the shape of the positioning groove 214 can be (but not limited to): a running field shape, a polygon, an ellipse, etc., which can have a limiting effect on the embedded objects of the same shape. Similarly, according to the shape change of the positioning groove 214, the shape of the base 31 of the assembly base 3 can also change accordingly.

[0079] In this embodiment, the number of the first fixing holes 215 is 3, and the corresponding number of the second fixing holes 311 can also be 3. The first fixing holes 215 are respectively arranged at the rounded corners of the rounded triangle, and the second fixing holes 311 are respectively arranged at the rounded corners of the rounded triangle of the base 31. However, the number of the first fixing holes 215 and the number of the second fixing holes 311 are not limited thereto. According to different specific application scenarios, in some embodiments, the number of the first fixing holes 215 and the number of the second fixing holes 311 are respectively (but not limited to): 2, 4, 5 or more.

[0080] In this embodiment, the assembly base 3 is made of metal, and the shell 1 and the connecting member 2 are made of plastic. The use of metal material can make the assembly base 3 have higher physical strength and can be suitable for high-speed rotation of the fan assembly 4.

[0081] Specifically, the assembly base 3 is made of aluminum alloy material. However, the material of the assembly base 3 is not limited thereto, and according to different specific application scenarios, in some embodiments, the material of the assembly base 3 can be (but not limited to): iron, aluminum, copper and other conventional metals, and can also be made of iron or copper alloy materials.

[0082] In some embodiments, the mounting base 3 and the housing 1 can be made of the same plastic material.

[0083] The fan assembly 4 includes: a fan motor 41 and fan blades 42 . The fan motor 41 is sleeved and connected to the assembly base 3 , and the fan motor 41 is connected to the assembly base 3 via a rotating shaft 414 , and the fan blades 42 are connected to the assembly base 3 via a rotating shaft 414 .

[0084] In the fan assembly 4, the fan motor 41 is connected to the assembly base 3 and the rotating shaft 414 respectively. The two connection methods can make the fan motor 41 suspended in the shell 1. At the same time, the sleeve installation can make the space occupied by the fan motor 41 and the assembly base 3 smaller.

[0085] The fan motor 41 includes: a coil 411, a magnetic ring 412 and a motor housing 413. The coil 411 is sleeved on the assembly base 3, the magnetic ring 412 is sleeved on the coil 411, the motor housing 413 is sleeved on the magnetic ring 412, and the motor housing 413 is fixedly connected to the rotating shaft 414, so that the fan housing 1 drives the rotating shaft 414 to rotate.

[0086] In this embodiment, when the coil 411 is energized, the driving magnetic ring 412 rotates, and then the magnetic ring 412 drives the motor housing 413 to rotate, and finally the motor housing 413 drives the rotating shaft 414 to rotate. This motor driving method enables the fan motor 41 to be sleeved on the assembly base 3. At the same time, since the force-bearing area of ​​the magnetic ring 412 is larger than that of the driven motor, the fan motor 41 rotates faster.

[0087] The coil 411 is interference fit with the assembly base 3, the magnetic ring 412 is magnetically coupled with the coil 411, and the motor housing 413 is interference fit with the rotating shaft 414. During the rotation of the magnetic ring 412 and the coil 411, the magnetic ring 412 is suspended and rotates, which is less physically frictional than the traditional motor, thus further increasing the speed of the fan motor 41.

[0088] In some embodiments, the connection method between the coil 411 and the assembly base 3 is not limited to interference fit. Depending on the specific application scenario, the connection method between the coil 411 and the assembly base 3 can also be (but not limited to): gluing, welding, riveting, screw connection and other fixing methods.

[0089] In some embodiments, the connection method between the motor housing 413 and the rotating shaft 414 is not limited to interference fit. Depending on the specific application scenario, the connection method between the motor housing 413 and the rotating shaft 414 can also be (not limited to): gluing, welding, riveting, screw connection and other fixing methods.

[0090] See also Figure 6 , Figure 6 Schematic diagram of the structure of the motor housing of this embodiment.

[0091] like Figure 6 As shown, in some embodiments, a limit stop edge 417 is provided inside the motor housing 413, and the limit stop edge 417 abuts against one end of the magnetic ring 412. The limit stop edge 417 is provided inside the motor housing 413, so that the magnetic ring 412 can be quickly assembled and limited, and the position of the motor housing 413 in the housing 1 is prevented from changing due to inconsistent assembly of the magnetic ring 412 position, thereby causing poor rotation stability of the fan module and easy friction damage.

[0092] The limit stop edge 417 on the motor housing 413 is formed due to the thickness variation of the side wall of the motor housing 413. The side wall thickness of the motor housing 413 adjacent to the fan blade 42 is larger, and the side wall thickness of the motor housing 413 adjacent to the connector 2 is smaller. The thickness variation of the side wall of the motor housing 413 forms the limit stop edge 417 inside the motor housing 413.

[0093] In some embodiments, the limit stop edge 417 inside the motor housing 413 can be a limit stop edge 417 formed by a protrusion on the inner surface of the motor housing 413 .

[0094] The fan blades 42 include: a hub 421 and a plurality of blades 422 . The plurality of blades 422 are arranged around the hub 421 , and the hub 421 is connected to the rotating shaft 414 .

[0095] See also Figure 7 and Figure 8 , Figure 7 This is a schematic structural diagram of the fan blades of this embodiment from a first viewing angle; Figure 8 This is a schematic structural diagram of the fan blades of this embodiment from a second viewing angle.

[0096] like Figure 7 and Figure 8As shown, in this embodiment, the number of blades 422 is 9. However, the number of blades 422 is not limited thereto, and according to different specific application scenarios, in some embodiments, the number of blades 422 can be (not limited to): 2, 3, 4, 5, 6, 7, 8, 10, 11 or more.

[0097] The hub 421 includes: a top surface 421a, a bottom surface 421c and a side 421b, the cross-sectional area of ​​the bottom surface 421c is larger than the cross-sectional area of ​​the top surface 421a, and the top surface 421a and the side 421b have a smooth transition. That is, in this embodiment, the hub 421 is configured to be in the shape of a bullet head with a flat head. This shape of the hub 421 enables the airflow flowing through the blades 422 to flow along the arc surface formed by the smooth transition between the top surface 421a and the side 421b, which has a good guiding effect on the airflow to form a wall attachment effect, thereby improving the efficiency of the airflow flowing in the fan blades 42, and thus improving the air outlet efficiency of the fan module.

[0098] However, the shape of the hub 421 is not limited thereto. Depending on the specific application scenario, in some embodiments, the shape of the hub 421 can be (but not limited to): hemispherical, conical, truncated cone, cylindrical, etc.

[0099] The top surface 421a of the hub 421 is a circular surface. However, the shape of the top surface 421a is not limited thereto, and according to different specific application scenarios, in some embodiments, the top surface 421a of the hub 421 can also be conical, polygonal, elliptical or other shapes.

[0100] Each of the plurality of blades 422 includes a first end 422a and a second end 422b opposite to the first end 422a, and the length of the first end 422a is greater than the length of the second end 422b. The first end 422a is located adjacent to the top surface 421a of the hub 421, and the second end 422b is located adjacent to the bottom surface 421c of the hub 421. In each blade 422, the first end 422a is used to push the airflow into the fan blade 42 when the fan blade 42 rotates. The longer length of the first end 422a is conducive to pushing the airflow. The second end 422b is located at the end of the airflow direction. The reduction in the length of the second end 422b is conducive to reducing the size of the space where the airflow flows, compressing the airflow, and increasing the initial kinetic energy of the airflow, thereby improving the air outlet efficiency of the fan module.

[0101] Each blade 422 is provided with a blade edge 422c. The thickness of each blade 422 gradually increases from the first end 422a to the blade edge 422c, and the thickness of each blade 422 gradually decreases from the blade edge 422c to the second end 422b. The thickness of different parts of the blade 422 varies, so that each blade 422 is constructed into a structure that is thinner at both ends and thicker in the middle. This structure enhances the cutting ability of the two ends of the blade 422 on the airflow and reduces the air resistance at both ends of the blade 422. The increase in the thickness of the middle part can enhance the physical strength of the blade 422. At the same time, the increase in the thickness of the blade 422 reduces the space between two adjacent blades 422, which has a pressurizing effect on the airflow passing through.

[0102] See also Fig. 9 and Fig.10 , Fig. 9 This is a structural schematic diagram of the assembly base of this embodiment from a first perspective; Fig.10 This is a structural schematic diagram of the second viewing angle of the assembly base of this embodiment.

[0103] like Fig. 9 and Fig.10 As shown, the assembly base 3 includes: a base 31 and a connecting column 32 , the base 31 is connected to the connecting member 2 , the connecting column 32 is connected to the base 31 , and the fan assembly 4 is sleeved and connected to the connecting column 32 .

[0104] The base 31 is configured in the shape of a rounded triangle, and the two adjacent rounded edges of the base 31 are also configured in an inner arc shape. With the inner arc shape, when the fan assembly 4 rotates, the force of the base 31 acting on the positioning groove 214 is decomposed in different directions of the arc edge, rather than concentrated in the same direction, further reducing the force strength of the edge of the positioning groove 214 and improving the service life of the fan assembly 4.

[0105] In some embodiments, the shape of the base 31 is not limited thereto. Depending on the specific application scenario, the shape of the base 31 can be (but not limited to): a running field shape, a polygonal shape, an elliptical shape, etc.

[0106] The connecting column 32 includes: a first column 321 and a second column 322 . The diameter of the first column 321 is greater than the diameter of the second column 322 . The first column 321 is connected to the base 31 . The second column 322 is connected to the first column 321 . The fan assembly 4 is sleeved and connected to the second column 322 .

[0107] The diameter of the first column 321 is greater than the diameter of the second body, so that the first column 321 and the second column 322 form a stepped structure. The first column 321 can serve as a stopper for the fan motor 41 or the PCB circuit board, facilitating the assembly of the fan motor 41 or the PCB circuit board.

[0108] In some embodiments, the shape of the connecting column 32 is not limited thereto. Depending on the specific application scenario, the connecting column 32 can be (but not limited to): a straight column, a prismatic column, or a composite structure consisting of a frustum and a straight column.

[0109] A connecting hole 33 is provided on the connecting column 32, and a first bearing 34 and a second bearing 35 are respectively provided at both ends of the connecting hole 33. The first bearing 34 and the second bearing 35 are inserted and passed through the first bearing 34 and the second bearing 35. A groove 414a is provided on one end of the rotating shaft 414 passing through the second bearing 35, and a retaining spring 415 is connected to the groove 414a.

[0110] The arrangement of the first bearing 34 and the second bearing 35 can make the rotating shaft 414 rotate more smoothly. At the same time, the arrangement of the two rotating shafts 414 makes the linear rotation of the rotating shaft 414 more stable, and can make the rotation speed of the fan motor 41 faster. The arrangement of the slot 414a and the retaining spring 415 can prevent the rotating shaft 414 from falling off from the first bearing 34 and the second bearing 35, thereby enhancing the stability and reliability of the connection of the rotating shaft 414.

[0111] The base 31 includes: a first protrusion 312 , a second protrusion 313 and a third protrusion 314 , wherein inner arc notches 315 are formed between the first protrusion 312 , the second protrusion 313 and the third protrusion 314 , and an outer arc piece 316 is provided between the second protrusion 313 and the third protrusion 314 .

[0112] The second fixing holes 311 are respectively arranged on the first protrusion 312, the second protrusion 313 and the third protrusion 314. The thickness of the outer arc piece 316 is less than the thickness of the base 31 body, and the second wiring hole 317 is provided on the outer arc piece 316. The structure of the inner arc notch 315 makes the edge of the positioning groove 214 in contact with the base 31 arc-shaped. When the fan assembly 4 rotates, the force of the base 31 acting on the positioning groove 214 is decomposed in different directions of the arc edge, rather than concentrated in the same direction, which further reduces the force strength of the edge of the positioning groove 214 and improves the service life of the fan assembly 4.

[0113] In some embodiments, a connecting platform 416 is provided at the position where the fan assembly 4 is connected to the rotating shaft 414. The rotating shaft 414 passes through the connecting platform 416 and is interference fit with the connecting platform 416. The end of the connecting platform 416 facing the first bearing 34 abuts against the first inner ring 341 of the first bearing 34.

[0114] Specifically, at the position where the motor housing 413 of the fan assembly 4 is connected to the rotating shaft 414, a protrusion extends in the direction of the connecting column 32 to form a connecting platform 416. The setting of the connecting platform 416 can increase the contact area between the motor housing 413 and the rotating shaft 414, enhance the connection strength between the motor housing 413 and the rotating shaft 414, and effectively prevent the problem of excessive local force, unstable connection, and short service life due to the small contact area between the motor housing 413 and the rotating shaft 414.

[0115] In some embodiments, the connection method between the connecting platform 416 and the rotating shaft 414 is not limited to interference fit. Depending on the specific application scenario, the connection method between the connecting platform 416 and the rotating shaft 414 can also be (but not limited to): gluing, welding, riveting, screw connection and other fixing methods.

[0116] The connecting platform 416 is in contact with the first inner ring 341 of the first bearing 34. When the motor housing 413 drives the rotating shaft 414 to rotate, in addition to the rotating shaft 414 driving the first inner ring 341 to rotate, the connecting platform 416 can also provide driving force for the first inner ring 341. This effectively avoids the problem that the rotating shaft 414 and the first inner ring 341 rotate relative to each other or slip due to long-term use, resulting in the first inner ring 341 and the rotating shaft 414 rotating asynchronously, thereby reducing the rotation efficiency of the rotating shaft 414. At the same time, when the motor housing 413 rotates, it will drive the first inner ring 341 of the first bearing 34 to rotate, and the first inner ring 341 can synchronously drive the rotating shaft 414 to rotate. In fact, through reasonable design, the force-bearing length of the rotating shaft 414 is extended, the rotation torque of the rotating shaft 414 is shortened, the force strength per unit area of ​​the rotating shaft 414 is reduced, and its service life is extended. At the same time, the rotating shaft 414 can be made to rotate more stably, reducing the vibration and noise of the fan module.

[0117] In some embodiments, a sleeve 36 is disposed between the second bearing 35 and the retaining spring 415 . The sleeve 36 is sleeved on the rotating shaft 414 , and one end of the sleeve 36 facing the second rotating shaft 414 abuts against the second inner ring 351 of the second bearing 35 .

[0118] The arrangement of the sleeve 36 can prevent the rotating shaft 414 from slipping with the first bearing 34 and the second bearing 35, which would cause the retaining spring 415 to contact the second bearing 35 and cause friction damage. The end of the sleeve 36 facing the second bearing 35 abuts against the second inner ring 351, so that the sleeve 36 can rotate synchronously with the rotating shaft 414 and the second inner ring 351, thereby preventing the sleeve 36 from causing friction and collision damage with the rotating shaft 414 and the second bearing 35 due to lack of driving force.

[0119] In some embodiments, one end of the sleeve 36 abuts against the retaining spring 415 , and the other end abuts against the second inner ring 351 of the second bearing 35 .

[0120] The shaft sleeve 36 is made of alloy material or metal material. However, the material of the shaft sleeve 36 is not limited thereto, and according to different specific application scenarios, in some embodiments, the shaft sleeve 36 can be made of plastic or rubber material.

[0121] In some embodiments, one end of the rotating shaft 414 connected to the retaining spring 415 is located inside the connecting inner ring 212 to prevent the protruding end of the rotating shaft 414 from causing friction damage with other components.

[0122] In some embodiments, a PCB circuit board is provided between the base 31 and the fan assembly 4, and the PCB circuit board is sleeved on the connecting column 32. The PCB circuit board is used to control functions such as starting, stopping, and speed change of the fan motor 41. The PCB circuit board is provided between the base 31 and the fan assembly 4, and sleeved on the connecting column 32, which can save the internal space of the fan module and improve the space utilization rate inside the fan module. At the same time, the distance between the PCB circuit board and the fan motor 41 is shortened, and the length of the wire connecting the two is reduced, which saves consumables.

[0123] The PCB circuit board is configured as a ring as a whole. However, the shape of the PCB circuit board is not limited thereto, and according to different specific application scenarios, in some embodiments, the shape of the PCB circuit board can be (not limited to): polygonal, elliptical or racetrack-shaped.

[0124] The PCB circuit board is connected to the connecting column 32 by means of interference fit. However, the fixing method of the PCB circuit board is not limited thereto. According to different specific application scenarios, in some embodiments, the PCB circuit board is also fixed to the coil 411 by screws.

[0125] In some embodiments, a first wiring hole 213 is provided on the connector 2, a second wiring hole 317 is provided at the base 31 corresponding to the first wiring hole 213, and the thickness of the base 31 at the position where the second wiring hole 317 is provided is smaller than the thickness at other positions of the base 31.

[0126] In order to facilitate wiring and prevent the wires connected to the PCB circuit board from leaking out, a first wiring hole 213 is provided on the connector 2, and a second wiring hole 317 is provided on the base 31. The provision of the first wiring hole 213 and the second wiring hole 317 allows the wires to be routed in a manner that does not leak out, thereby improving the smoothness of the airflow inside the fan module. At the same time, the thickness of the base 31 at the position where the second wiring hole 317 is provided is less than the thickness at other positions of the base 31, which can reduce the overall weight of the base 31 and make the fan module more portable. The design of the thickness variation cooperates with the design of the positioning groove 214, so that the side of the base 31 facing the fan motor 41 is smoother and neater.

[0127] In some embodiments, a flexible sleeve 5 is sleeved on the housing 1, and an annular protrusion 51 and a dot-shaped protrusion 52 are alternately arranged on the outside of the flexible sleeve 5. The setting of the flexible sleeve 5 can increase the friction between the fan module and the external object or other matching structure, so that the connection stability of the fan module is stronger. At the same time, the setting of the flexible sleeve 5 can also effectively buffer the physical vibration generated when the fan module is working, so that the rotation of the fan module is more stable and the noise generated is smaller.

[0128] The flexible sleeve 5 is alternately provided with annular protrusions 51 and dot-shaped protrusions 52 on the outside. Specifically, in some embodiments, the annular protrusions 51 are provided at both ends of the flexible sleeve 5, and the dot-shaped protrusions 52 are provided between the two annular protrusions 51. Alternatively, the annular protrusions 51 are provided at both ends and the middle position of the flexible sleeve 5, and the dot-shaped protrusions 52 are provided between two adjacent annular protrusions 51. However, the alternating arrangement of the annular protrusions 51 and the dot-shaped protrusions 52 is not limited thereto, and the number of the annular protrusions 51 can be: 4, 5, 6 or more. The dot-shaped protrusions 52 can also be provided at one end or both ends of the flexible sleeve 5.

[0129] The alternating arrangement of the annular protrusions 51 and the dot-shaped protrusions 52 provides the annular protrusions 51 and the dot-shaped protrusions 52 with a larger deformation space, which facilitates the assembly of the fan module. At the same time, the enlargement of the deformation space can improve the buffering performance of the flexible sleeve 5.

[0130] The ratio range of the inner diameter of the housing 1 to the maximum diameter of the fan blades 42 is 1.01-1.15. The ratio range of the inner diameter of the housing 1 to the maximum diameter of the fan blades 42 defines the gap between the housing 1 and the maximum diameter of the fan blades 42. When the fan blades 42 rotate, centrifugal force is generated on the airflow passing through the fan blades 42. Under the action of the centrifugal force, the airflow moves laterally and collides with the inner wall of the housing 1, generating turbulence, thereby affecting the airflow field in the housing 1, resulting in a low air outlet efficiency of the fan module. The ratio range of the inner diameter of the housing 1 to the maximum diameter of the fan blades 42 is limited to 1.01-1.15, which limits the gap between the fan blades 42 and the housing 1, reduces the stroke of the lateral airflow under the action of the centrifugal force, and limits the speed of the airflow when it contacts the inner side surface of the housing 1 to a smaller priority range. Therefore, this ratio can reduce the energy loss when the airflow collides with the housing 1, reduce the probability of turbulence, and improve the stability of the airflow field. At the same time, since the ratio range of the inner diameter of the shell 1 and the maximum diameter of the fan blades 42 is limited to between 1.01 and 1.15, within this ratio range, the distance between the fan blades 42 and the shell 1 is small, which can have an excellent interception effect on the return airflow in the fan blades 42, preventing the cyclone generated by the return airflow from affecting the air intake of the fan blades 42, thereby improving the air intake efficiency of the fan module. The improvement in the air intake efficiency improves the overall air outlet efficiency of the fan module.

[0131] In some embodiments, the length ratio of the first end 422a and the second end 422b is in the range of 1.4-1.9. The airflow flowing through the fan flows from the first end 422a to the second end 422b, and the direction of the first end 422a facing the second end 422b gradually decreases. This reduction process cooperates with the size change of the hub 421 to gradually reduce the space for the airflow to flow, gradually pressurize the convection, and increase the initial velocity of the airflow. However, since there is a gap between the fan blades 42 and the housing 1, when the pressure of the airflow entering the first end 422a and flowing out of the second end 422b is obviously too large, since it is not a completely closed space, the airflow will have a backflow phenomenon due to excessive pressure, and the backflow airflow will impact the intake airflow of the fan module to form a cyclone, reducing the air intake efficiency of the fan module. The length ratio range of the first end 422a and the second end 422b is limited to 1.4-1.9. Within this ratio range, the airflow pressure flowing through the fan blade 42 is adjusted within the optimal range, which minimizes the backflow problem caused by excessive pressure. At the same time, within the range of this ratio, the first end 422a can most effectively intercept and utilize the return airflow gradually overflowing from the edge of the blade 422, and minimize the probability of the return airflow flowing out of the housing 1. The combination of the two effects can make the airflow entering the first end 422a and the airflow outflowing from the end of the airflow approach the optimal value of 1:1. The air outlet efficiency of the fan blade 42 is greatly improved.

[0132] It should be noted that any implementation in this embodiment can be implemented independently or in combination with one or more other implementations. When implemented in combination, the combination method should not be limited to the combination methods listed in this embodiment.

[0133] Example 2

[0134] A blowing device includes the fan module in Example 1, wherein the fan module serves as a core module component for assembling the blowing device.

[0135] It should be noted that the blowing device in this embodiment includes (but is not limited to): bladeless fans, desktop fans, floor fans, spherical fans, neck fans, handheld fans, industrial fans, air conditioners, hair dryers and other products that need to promote air circulation. The fan module in Example 1 is assembled inside the shell of the above products.

[0136] The blowing device in this embodiment sets the connecting member 2 in the housing 1, the assembly base 3 is connected to the connecting member 2, the fan assembly 4 is connected to the assembly base 3, and the assembly base 3 and the fan assembly 4 are connected in two ways. First, part of the structure of the fan assembly 4 is sleeved and installed on the assembly base 3; second, part of the structure of the fan assembly 4 is also connected to the assembly base 3 through the rotating shaft 414. The multiplexed connection method between the fan assembly 4 and the assembly base 3 not only increases the connection stability between the fan assembly 4 and the assembly base 3, but also, this composite connection method can greatly reduce the space occupied by the fan assembly 4 in the housing 1, so that the volume of the fan module can be further reduced.

[0137] It should be noted that the preferred embodiments of the present application are given in the specification and drawings of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described in the specification. These embodiments are not intended to be additional limitations on the content of the present application. The purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. In addition, the above-mentioned technical features continue to be combined with each other to form various embodiments not listed above, which are all considered to be within the scope of the present invention; further, for ordinary technicians in this field, they can be improved or transformed according to the above description, and all these improvements and transformations should belong to the scope of protection of the claims attached to the present application.

Claims

1. A fan module, characterized in that: include: case; A connecting piece, the connecting piece is arranged in the housing, and an air duct is provided on the connecting piece; An assembly base, the assembly base being connected to the connecting member; A fan assembly is sleeved and connected to the assembly base, and the fan assembly is connected to the assembly base through a rotating shaft.

2. The fan module according to claim 1, characterized in that: The assembly base is detachably connected to the connecting member, and the assembly base is made of metal; and / or, The shell is covered with a flexible sleeve, and the outside of the flexible sleeve is alternately provided with annular protrusions and dot-shaped protrusions; and / or, The connecting member comprises: a connecting ring and a plurality of connecting plates, wherein the plurality of connecting plates are arranged around the connecting ring, one end of each of the plurality of connecting plates is connected to the inner surface of the shell, and the other end of each of the connecting plates is connected to the connecting ring, and two adjacent connecting plates of the plurality of connecting plates are enclosed to form the air duct; and / or, The end of each connecting plate facing the fan assembly is bent and extended toward the fan assembly to form an air guide plate, and the bending direction of the air guide plate is opposite to the rotation direction of the fan assembly; and / or, The fan assembly comprises: a fan motor and fan blades, wherein the fan motor is sleeved and connected to the assembly base, and the fan motor is connected to the assembly base via a rotating shaft, and the fan blades are connected to the assembly base via a rotating shaft; and / or, The assembly base comprises: a base and a connecting column, the base is connected to the connecting member, the connecting column is connected to the base, and the fan assembly is sleeved and connected to the connecting column.

3. The fan module according to claim 2, characterized in that: The connecting member is provided with a plurality of first fixing holes, and the assembly base is provided with a plurality of second fixing holes correspondingly, and the plurality of first fixing holes and the plurality of second fixing holes are connected by screws; and / or, The connecting member is provided with a positioning groove, and one end of the assembly base connected to the connecting member is arranged in the positioning groove; and / or, The air guide plate is disposed between the fan assembly and the housing, and the air guide plate is connected to the inner surface of the housing, and there is a gap between the air guide plate and the fan assembly; and / or, The connecting ring comprises: a connecting outer ring and a connecting inner ring, the connecting inner ring is arranged inside the connecting outer ring, the connecting outer ring is connected to the plurality of connecting plates, the assembly base is connected to the connecting inner ring, and the thickness of the connecting outer ring is greater than the thickness of the connecting inner ring; and / or, The fan motor comprises: a coil, a magnetic ring and a motor housing, wherein the coil is sleeved on the assembly base, the magnetic ring is sleeved on the coil, the motor housing is sleeved on the magnetic ring, and the motor housing is fixedly connected to the rotating shaft so that the fan housing drives the rotating shaft to rotate; and / or, The fan blades include: a hub and a plurality of blades, wherein the plurality of blades are arranged around the hub, and the hub is connected to the rotating shaft.

4. The fan module according to claim 3, characterized in that: The coil is interference-fitted with the assembly base, the magnetic ring is magnetically coupled with the coil, and the motor housing is interference-fitted with the rotating shaft; and / or, A limit stop edge is arranged inside the motor housing, and the limit stop edge abuts against one end of the magnetic ring; and / or, The ratio of the inner diameter of the housing to the maximum diameter of the fan blade is in the range of 1.01-1.15; and / or, Each of the plurality of blades comprises a first end and a second end opposite to the first end, the length of the first end is greater than the length of the second end, each of the blades is provided with a blade edge, the thickness of each blade gradually increases from the first end to the blade edge, and the thickness of each blade gradually decreases from the blade edge to the second end; and / or, The hub comprises: a top surface, a bottom surface and a side edge, the cross-sectional area of ​​the bottom surface is larger than the cross-sectional area of ​​the top surface, and there is a smooth transition between the top surface and the side edge.

5. The fan module according to claim 4, characterized in that: The length ratio of the first end portion to the second end portion is in the range of 1.4-1.

9.

6. The fan module according to claim 2, characterized in that: The connecting column comprises: a first column and a second column, the diameter of the first column is larger than the diameter of the second column, the first column is connected to the base, the second column is connected to the first column, and the fan assembly is sleeved and connected to the second column; and / or, The connecting column is provided with a connecting hole, and the two ends of the connecting hole are respectively provided with a first bearing and a second bearing, the rotating shaft is inserted into and passes through the first bearing and the second bearing, and the end of the rotating shaft passing through the second bearing is provided with a clamping groove, and the clamping groove is connected with a retaining spring; and / or, The base comprises: a first protruding portion, a second protruding portion and a third protruding portion, wherein inner arc notches are formed between the first protruding portion, the second protruding portion and the third protruding portion, and an outer arc piece is provided between the second protruding portion and the third protruding portion.

7. The fan module according to claim 6, characterized in that: A connecting platform is provided at the position where the fan assembly is connected to the rotating shaft, the rotating shaft passes through the connecting platform and is interference fit with the connecting platform, and one end of the connecting platform facing the first bearing abuts against the first inner ring of the first bearing; and / or, A shaft sleeve is arranged between the second bearing and the retaining spring. The shaft sleeve is sleeved on the rotating shaft. One end of the shaft sleeve facing the second rotating shaft abuts against the second inner ring of the second bearing.

8. The fan module according to claim 2, characterized in that: A PCB circuit board is arranged between the base and the fan assembly, and the PCB circuit board is sleeved on the connecting column.

9. The fan module according to claim 8, characterized in that: The connecting member is provided with a first wiring hole, the base is provided with a second wiring hole at the position of the first wiring hole correspondingly, and the thickness of the base at the position where the second wiring hole is provided is smaller than the thickness at other positions of the base.

10. A blowing device, characterized in that: The blowing device is assembled with a fan module as described in any one of claims 1-8.

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