Blower and in-vehicle ventilation system

Abstract

The application relates to a blower and a vehicle ventilation system. The blower comprises a motor, a rotor assembly, a stator assembly, a circuit board and a motor shell, the stator assembly is electrically connected with the circuit board; a mounting seat, the circuit board is mounted on the mounting seat, the motor shell is connected with the mounting seat, and the stator assembly and the circuit board are arranged between the motor shell and the mounting seat; a stator support, the mounting seat and the stator support are arranged along a first direction and are connected, the mounting seat, the circuit board and the stator assembly are arranged along the first direction, the stator support sequentially passes through the circuit board and the stator assembly, and the stator assembly is mounted on the stator support; and an impeller, the impeller is connected with a rotor shaft of the rotor assembly, and the impeller can rotate around the first direction under the driving of the motor. The internal structure of the blower is more compact, the overall axial size is smaller, and the space required during installation can be reduced.

Description

Technical Field

[0001] This invention relates to the field of vehicle ventilation technology, and in particular to blowers and vehicle ventilation systems. Background Technology

[0002] Blowers, as ventilation equipment, are widely used in various fields. For example, blowers are installed in cars to achieve airflow circulation, and in household appliances such as humidifiers to achieve directional flow of water mist. Typically, a blower consists of a motor and an impeller, with the impeller driven by the motor to rotate. In some related technologies, the internal structure of some blowers is not compact enough, resulting in a large overall axial dimension, which leads to the need for a significant amount of space during installation. Summary of the Invention

[0003] Based on this, the present invention proposes a blower with a more compact internal structure and a smaller overall axial dimension, which can reduce the space required for installation.

[0004] Blower, including:

[0005] An electric motor, comprising a rotor assembly, a stator assembly, a circuit board, and a motor housing, wherein the stator assembly is electrically connected to the circuit board;

[0006] Mounting base, the circuit board is mounted on the mounting base, the motor housing is connected to the mounting base, and the stator assembly and the circuit board are disposed in the cavity defined between the motor housing and the mounting base;

[0007] A stator support, wherein the mounting base and the stator support are arranged along a first direction and connected thereto, the mounting base, the circuit board and the stator assembly are arranged along the first direction, the stator support passes through the circuit board and the stator assembly in sequence, and the stator assembly is mounted on the stator support;

[0008] An impeller is connected to the rotor shaft of the rotor assembly, and the impeller is capable of rotating about the first direction under the drive of the motor.

[0009] In one embodiment, the stator support includes a base and at least one protrusion extending outward from the outer periphery of the base. The protrusion is connected to the mounting base and is located between the circuit board and the mounting base. The base passes sequentially through the circuit board and the stator assembly. The mounting base is provided with a circuit board fixing member extending in the first direction and connected to the circuit board. The circuit board fixing member and the protrusion are offset from each other along the projection of the protrusion on the circuit board in the first direction.

[0010] In one embodiment, a plurality of protrusions extend from the outer periphery of the base, spaced apart circumferentially along the motor, and the circuit board fixing member extends to the circuit board through the gaps between adjacent protrusions.

[0011] In one embodiment, the base includes a support member and a pressure block arranged along the first direction. The outer periphery of the connection between the support member and the pressure block is provided with a mounting groove. The stator assembly includes a mounting member extending into the mounting groove. The support member and the pressure block are fixedly connected by fasteners to clamp and fix the mounting member to the groove wall of the mounting groove.

[0012] In one embodiment, the rotor assembly includes a magnet and a rotor housing, the rotor shaft passes through the stator support and the two are connected by a bearing, the rotor housing is fitted onto the rotor shaft and extends to the outer side of the outer periphery of the stator assembly, the magnet is mounted on the inner wall of the rotor housing, and the magnet and the stator assembly are arranged radially spaced along the motor.

[0013] In one embodiment, the stator support includes a base and at least one protrusion extending outward from the outer periphery of the base. The protrusion is connected to the mounting base. The base passes sequentially through the circuit board and the stator assembly. The base includes a support member and a pressure block arranged along the first direction. The support member and the pressure block are fixedly connected by fasteners to clamp and fix the stator assembly. The rotor shaft passes through the support member and the pressure block, and bearings are provided between the rotor shaft and the support member, and between the rotor shaft and the pressure block.

[0014] In one embodiment, the impeller includes a connecting cover and a plurality of fan blades spaced circumferentially along the motor. Along the radial direction of the motor, the inner end of the connecting cover is mounted to the rotor shaft of the rotor assembly, and the outer end of the connecting cover is connected to the fan blades extending in a first direction. Along the first direction, the distance between the outer end and the mounting base is less than the distance between the inner end and the mounting base. The motor housing is located between the connecting cover and the rotor housing of the rotor assembly, and the rotor housing, the connecting cover, and the motor housing all extend in the same direction in at least a portion of their respective regions.

[0015] In one embodiment, the stator support includes a base and at least one protrusion extending outward from the outer periphery of the base. The protrusion is connected to the mounting base, and a first elastic buffer is disposed between the protrusion and the mounting base. Both the protrusion and the mounting base are shaped to match the first elastic buffer.

[0016] In one embodiment, the mounting base is provided with a mounting cavity that matches the shape of the first elastic buffer. The first elastic buffer is disposed in the mounting cavity. The first elastic buffer includes a first buffer portion and a second buffer portion extending radially along the motor. Along the radial direction of the motor, the first buffer portion is connected to the outer end of the second buffer portion, and the first buffer portion extends to both sides circumferentially along the motor from the connection between the second buffer portion and the first buffer portion.

[0017] In one embodiment, the first elastic buffer is provided with a limiting groove that matches the shape of the protrusion, the protrusion is disposed in the limiting groove, the protrusion is provided with a protrusion, the first elastic buffer is provided with a first through hole at a corresponding position, the mounting base is provided with a second through hole at a corresponding position, and the protrusion passes through the first through hole and the second through hole in sequence.

[0018] In one embodiment, the stator assembly includes a resilient connection terminal and a coil. The coil is electrically connected to the circuit board through the resilient connection terminal. The resilient connection terminal is capable of elastic deformation in any one of three mutually perpendicular directions. When the coil and the circuit board undergo relative displacement in space, the resilient connection terminal is capable of elastic deformation so that the coil and the circuit board remain electrically connected after relative displacement.

[0019] In one embodiment, the elastic connection terminal includes a first elastic member and a second elastic member, both of which are cylindrical. One end of the first elastic member along its own axial direction is connected to one end of the second elastic member along its own axial direction. There is an angle between the axial directions of the first elastic member and the second elastic member. The first elastic member and the second elastic member are rotatable relative to their connection point.

[0020] In one embodiment, the resilient connecting terminal includes at least three plate-shaped resilient portions, wherein the intersection line of the plate surfaces of adjacent resilient portions serves as a connecting axis, and two adjacent resilient portions are capable of rotating relative to each other around the connecting axis. The connecting axis between some adjacent resilient portions is a first type of connecting axis, and the connecting axis between some adjacent resilient portions is a second type of connecting axis. The axial direction of the first type of connecting axis is perpendicular to the axial direction of the second type of connecting axis.

[0021] In one embodiment, the connecting shafts of multiple sets of adjacent elastic portions are first type of connecting shafts, and / or, the connecting shafts of multiple sets of adjacent elastic portions are second type of connecting shafts.

[0022] In one embodiment, the circuit board is provided with a clearance hole for the stator support to pass through. The first end of the elastic connection terminal is electrically connected to the coil, and the tail end of the elastic connection terminal is electrically connected to the circuit board. The first end and the tail end are respectively located on both sides of the circuit board, and the middle section of the elastic connection terminal located between the first end and the tail end is located in the clearance hole.

[0023] In the aforementioned blower, the mounting base is connected to the stator bracket, the circuit board is mounted on the mounting base, and the stator assembly is mounted on the stator bracket. The mounting base and stator bracket are arranged along a first direction, and the mounting base, circuit board, and stator assembly are also arranged along the first direction, meaning the circuit board is located between the mounting base and the stator assembly. Compared to conventional installation methods where the circuit board is external to the mounting base, this solution can fully utilize the space between the internal mounting base and the stator assembly of the blower, resulting in a more compact distribution of components along the motor's axial direction, a smaller overall axial dimension, and lower space requirements during blower installation, making it easier to install in confined spaces. At the same time, it is also convenient to disassemble and assemble internal components. For example, when it is necessary to remove the circuit board, simply disconnect the stator assembly from the stator bracket, then move the stator assembly in the first direction to detach it from the stator bracket. Then disconnect the circuit board from the mounting base, and then move the circuit board in the first direction to detach it from the mounting base. When it is necessary to assemble, simply install the stator bracket on the mounting base, then pass the stator bracket through the circuit board, connect the circuit board to the mounting base, then put the stator assembly on the stator bracket, and connect the two.

[0024] The present invention proposes an in-vehicle ventilation system, including the aforementioned blower, and also including a blower connector, wherein the blower is mounted on the blower connector.

[0025] In one embodiment, a second elastic buffer is also included. The blower has a first groove, and the blower connector has a second groove. When the blower is installed on the blower connector, the second elastic buffer is engaged between the groove wall of the first groove and the groove wall of the second groove, and there is a gap between the end face of the blower and the end face of the blower connector.

[0026] In one embodiment, the length directions of the first groove and the second groove are both along the circumference of the blower, the width directions of the first groove and the second groove are both along the radial direction of the blower, and the height directions of the first groove and the second groove are both along the axial direction of the blower; along the radial direction of the blower, the groove walls of the first groove and the second groove extend in an arc shape.

[0027] In one embodiment, the maximum compression of the second elastic buffer is b, and when the second elastic buffer is not compressed, the gap between the end face of the blower and the end face of the blower connector is a, b < a, and 0.7 ≤ b / a ≤ 0.9.

[0028] The aforementioned in-vehicle ventilation system uses the aforementioned blower. This type of blower has a more compact internal structure and a smaller overall axial dimension, which can reduce the space required for installation and thus reduce the space occupied by the in-vehicle ventilation system. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of a blower according to one embodiment of the present invention;

[0030] Figure 2 for Figure 1 A sectional view of the central blower;

[0031] Figure 3 for Figure 1 A schematic diagram of the stator support and mounting base of the medium blower;

[0032] Figure 4 for Figure 3 Exploded view of components such as the stator support, mounting base, and circuit board of the medium blower;

[0033] Figure 5 for Figure 1 A sectional view of the rotor assembly, stator assembly, stator support and mounting base of the medium blower;

[0034] Figure 6 for Figure 1 A schematic diagram of the structure of the stator assembly and stator support of the medium blower;

[0035] Figure 7 for Figure 1 A structural diagram of the stator assembly and flexible connection terminals of the medium blower (compared to...). Figure 5 (Inverted);

[0036] Figure 8 for Figure 1 A schematic diagram of the stator assembly of a medium-sized blower (compared to...) Figure 5 (Inverted);

[0037] Figure 9 for Figure 1 A schematic diagram of the flexible connection terminal of the medium blower;

[0038] Figure 10 This is a schematic diagram of the structure of the blower and blower connector in one embodiment of the present invention;

[0039] Figure 11 for Figure 10 Schematic diagram of the structure of the medium-sized blower;

[0040] Figure 12 for Figure 10 Schematic diagram of the connecting parts of the medium blower (compared to) Figure 10 (Inverted).

[0041] Figure label:

[0042] Rotor assembly 100, rotor shaft 110, rotor housing 120, magnet 130;

[0043] Stator assembly 200, stator core 210, coil winding section 220, stator core connecting terminal 230, elastic connecting terminal 240, first elastic section 241, second elastic section 242, third elastic section 243, fourth elastic section 244, fifth elastic section 245, sixth elastic section 246, seventh elastic section 2471, eighth elastic section 2472, start end 248, tail end 249, mounting component 250;

[0044] Circuit board 300, slot 310, clearance hole 320, fixing hole 330, positioning hole 340;

[0045] Stator bracket 400, base 410, support 411, pressure block 412, mounting groove 413, extension 420, protrusion 421;

[0046] Mounting base 500, mounting cavity 510, second through hole 511, circuit board fixing component 520, positioning pin 530, first elastic buffer component 540, first buffer part 541, second buffer part 542, limiting groove 543, first through hole 544;

[0047] Impeller 600, connecting cover 610, fan blade 620;

[0048] Motor housing 710, bearing 720;

[0049] Blower 810, hook 811, limiting hole 812, first groove 813, blower connector 820, locking block 821, limiting post 822, second groove 823, second elastic buffer 830. Detailed Implementation

[0050] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0051] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0052] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0053] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0054] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0055] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0056] See Figures 1 to 3 ,as well as Figure 5 and Figure 7 An embodiment of the present invention provides a blower including a motor, a stator support 400, a mounting base 500, and an impeller 600. The motor includes a rotor assembly 100, a stator assembly 200, a circuit board 300, and a motor housing 710. The stator assembly 200 and the circuit board 300 are electrically connected. The motor housing 710 is connected to the mounting base 500, and the stator assembly 200 and the circuit board 300 are disposed within a cavity defined between the motor housing 710 and the mounting base 500. The mounting base 500 and the stator support 400 are arranged along a first direction, and the mounting base 500, the circuit board 300, and the stator assembly 200 are also arranged along the first direction. The stator support 400 passes sequentially through the circuit board 300 and the stator assembly 200. The mounting base 500 is connected to the stator support 400, the circuit board 300 is mounted on the mounting base 500, and the stator assembly 200 is mounted on the stator support 400. The impeller 600 is connected to the rotor shaft 110 of the rotor assembly 100, and the impeller 600 can rotate in a first direction under the drive of a motor. Figure 2 The direction from bottom to top is the first direction, which is also the axis of the motor, and the horizontal direction is the radial direction of the motor. Of course, the orientation shown in the attached diagram is only the relative position of each component, not the absolute position of the blower during installation.

[0057] In the aforementioned blower, the mounting base 500 is connected to the stator bracket 400. The circuit board 300 is mounted on the mounting base 500, and the stator assembly 200 is mounted on the stator bracket 400. The mounting base 500 and the stator bracket 400 are arranged along a first direction, meaning the circuit board 300 is located between the mounting base 500 and the stator assembly 200. Compared to the conventional method where the circuit board 300 is externally positioned below the mounting base 500, this solution fully utilizes the space between the mounting base 500 and the stator assembly 200 inside the blower, resulting in a more compact distribution of components along the motor's axial direction, a smaller overall axial dimension, and lower installation space requirements, making it easier to install in confined spaces. Meanwhile, it is also convenient to disassemble and assemble internal components. For example, when it is necessary to remove the circuit board 300, simply disconnect the stator assembly 200 from the stator bracket 400, and then move the stator assembly 200 upwards to detach it from the stator bracket 400. Then disconnect the circuit board 300 from the mounting base 500, and then move the circuit board 300 upwards to detach it from the mounting base 500. When it is necessary to assemble, simply install the stator bracket 400 on the top of the mounting base 500, then pass the stator bracket 400 through the circuit board 300, connect the circuit board 300 to the mounting base 500, and then fit the stator assembly 200 onto the stator bracket 400 and connect the two.

[0058] Specifically, in some embodiments, the stator assembly 200 and the circuit board 300 are electrically connected via wires. Alternatively, in some embodiments, the stator assembly 200 and the circuit board 300 are electrically connected via a pin-slot or other plug-in connection. Preferably, the stator bracket 400 can be detachably mounted on the top of the mounting base 500 using threaded fasteners, snap-fit ​​connections, or other detachable mounting methods for easy disassembly and maintenance. The impeller 600 includes fan blades 620. When the impeller 600 is driven to rotate by a motor, the fan blades 620 also rotate, thus delivering airflow and accelerating airflow.

[0059] See Figures 2 to 4 In some embodiments, the stator support 400 includes a base 410 and at least one extension 420. The extension 420 extends outward from the outer periphery of the base 410 and is connected to the mounting base 500. The extension 420 is located between the circuit board 300 and the mounting base 500. The base 410 passes through the circuit board 300 and the stator assembly 200 in sequence. The mounting base 500 is provided with a circuit board fixing member 520 that extends in a first direction and is connected to the circuit board 300. The circuit board fixing member 520 and the extension 420 are offset from each other in projection on the circuit board 300 along the first direction.

[0060] Specifically, the protruding member 420 is connected to the side of the base 410 near the mounting base 500, that is, near the bottom end of the base 410, and the protruding member 420 extends outward along the radial direction of the motor. Preferably, the protruding member 420 and the mounting base 500 are detachably connected to facilitate subsequent disassembly and maintenance. Specifically, the protruding member 420 and the mounting base 500 can be installed by means of threaded fasteners or snap-fit. Preferably, the mounting base 500 is provided with a recessed mounting cavity 510, and the shape and size of the protruding member 420 match the cavity wall of the mounting cavity 510, and the protruding member 420 is accommodated within the mounting cavity 510. A fixing post protrudes downward from the bottom of the protruding member 420, and the fixing post passes downward through a through hole provided at a corresponding position on the cavity wall of the mounting cavity 510 to facilitate quick positioning during installation. A circuit board fixing member 520 extends upward from the area on the top surface of the mounting base 500 where the mounting cavity 510 is not provided, and a fixing hole 330 is provided at a corresponding position on the circuit board 300. The circuit board fixing member 520 extends upwards above the protrusion member 420, and the circuit board 300 is supported by the circuit board fixing member 520. The circuit board fixing member 520 is aligned with the fixing hole 330, and the two are fixedly connected by threaded fasteners. Preferably, a positioning pin 530 extends upwards from the area on the top surface of the mounting base 500 where the mounting cavity 510 is not provided. A positioning hole 340 is provided at the corresponding position on the circuit board 300. The positioning pin 530 is inserted into the positioning hole 340 to facilitate quick positioning during installation and to prevent the circuit board 300 from shifting after installation. Preferably, multiple circuit board fixing members 520 and positioning pins 530 are provided to make the installation more secure and the positioning effect better. In the above embodiments, since the circuit board fixing member 520 and the protruding member 420 are projected off on the circuit board 300 along the first direction, that is, the circuit board fixing member 520 extends upward from the area on the top surface of the mounting base 500 where the mounting cavity 510 is not provided, it can be ensured that when the circuit board fixing member 520 extends upward to the height of the protruding member 420, it can avoid the protruding member 420, and the two will not interfere with each other. This allows full utilization of the space outside the protruding member 420, making the radial distribution of the components more reasonable and compact, which is beneficial to reducing the radial dimension. Of course, in some other embodiments, if the radial dimension is not considered, the radial dimension of the mounting base 500 can be increased, and the circuit board fixing member 520 extending upward to the outer ring of the protruding member 420 can be provided on the part of the mounting base 500 that extends to the outer ring of the protruding member 420 to avoid the protruding member 420. Alternatively, if the requirement for installation firmness is not high, the radial dimension of the protruding member 420 can be reduced, so that the outer ring of the protruding member 420 is retracted inward. This is similar to the method of increasing the radial dimension of the mounting base 500.

[0061] See Figures 2 to 4In some embodiments, a plurality of protrusions 420, spaced apart circumferentially along the outer periphery of the base 410, extend from the base 410. Circuit board fixing members 520 extend to the circuit board 300 through the gaps between adjacent protrusions 420. Specifically, in the embodiment shown in the attached drawings, three protrusions 420, evenly spaced circumferentially, are connected near the bottom of the base 410. A gap is formed between adjacent protrusions 420. When the circuit board fixing member 520, located on the top surface of the mounting base 500, extends upwards, it passes through this gap to avoid interference. By providing multiple protrusions 420, the installation between the stator support 400 and the mounting base 500 becomes more secure and stable. As the number of protrusions 420 increases, the number of circuit board fixing members 520 also increases accordingly. By providing multiple circuit board fixing members 520, the installation between the circuit board 300 and the mounting base 500 becomes more secure and stable.

[0062] See Figures 2 to 4In some embodiments, the base 410 includes a support member 411 and a pressure block 412 arranged along a first direction. The outer periphery of the connection between the support member 411 and the pressure block 412 is provided with a mounting groove 413. The stator assembly 200 includes a mounting member 250 extending into the mounting groove 413. The support member 411 and the pressure block 412 are fixedly connected by fasteners to clamp and fix the mounting member 250 to the groove wall of the mounting groove 413. Specifically, the support member 411 has a stepped shape near the top, wider at the bottom and narrower at the top, forming part of the groove wall of the mounting groove 413. The pressure block 412 has an approximately stepped shape near the bottom, wider at the top and narrower at the bottom, forming part of the groove wall of the mounting groove 413. Multiple mounting members 250 extend inwardly from the inner wall of the stator core 210 in the stator assembly 200. The shape and size of the mounting members 250 match the mounting groove 413. Mounting member 250 is supported on top of support member 411. Simultaneously, pressure block 412 presses against the top of mounting member 250, and pressure block 412 is fixedly connected to support member 411, thereby clamping and fixing mounting member 250, suspending stator assembly 200 outside base 410. Specifically, pressure block 412 and support member 411 can be connected by threaded fasteners, or by a snap-fit ​​structure. Preferably, mounting member 250 is made of rubber or silicone, so it is not easily damaged by excessive clamping force when clamped and fixed. In the above embodiments, the base 410 is formed by a support member 411 and a pressure block 412 fixedly connected, which facilitates the installation and disassembly of the stator assembly 200. During installation, the stator assembly 200 is fitted onto the top of the support member 411, the position of the mounting member 250 is adjusted, and then the pressure block 412 is pressed onto the top of the stator assembly 200 and locked to the support member 411 with screws. During disassembly, the stator assembly 200 can be removed simply by unscrewing the screws and removing the pressure block 412. In other embodiments, an outwardly protruding boss can be provided on the outer periphery of the support member 411. The stator assembly 200 is fitted onto the outside of the base 410, and the mounting member 250 is supported on the boss. At the same time, the pressure block 412 is pressed against the top of the mounting member 250, and the pressure block 412 is fixedly connected to the support member 411.

[0063] See Figure 2 , Figure 5 and Figure 7In some embodiments, the rotor assembly 100 includes a rotor shaft 110, magnets 130, and a rotor housing 120. The rotor shaft 110 passes through the stator support 400 and is connected to it by a bearing 720. The rotor housing 120 is fitted onto the rotor shaft 110 and extends to the outer side of the outer periphery of the stator assembly 200. The magnets 130 are mounted on the inner wall of the rotor housing 120. The magnets 130 and the stator assembly 200 are arranged radially along the motor, and there is a gap between the magnets 130 and the stator assembly 200. Specifically, the rotor housing 120 extends radially outward and axially downward at its outer end, forming a shape with an open bottom and a closed top. A plurality of magnets 130 are provided on the inner sidewall of the rotor housing 120. The coil winding portion 220 in the stator assembly 200 is used for winding the coil, and the magnets 130 are located radially outward of the coil, with a gap between them. The magnet 130 interacts with the energized coil, causing the magnet 130 to rotate, which in turn drives the rotor housing 120 and the rotor shaft 110 to rotate, outputting power through the rotor shaft 110. In this embodiment, the stator bracket 400 is disposed inside the stator assembly 200, and the stator assembly 200 and the rotor assembly 100 are installed simultaneously through the stator bracket 400. This makes full use of the space inside the stator assembly 200, reducing the axial and radial dimensions of the motor. At the same time, if the blower shakes due to external factors, since both the stator assembly 200 and the rotor assembly 100 are installed on the stator bracket 400, the relative positions between the stator assembly 200 and the rotor assembly 100 remain unchanged, making it less likely for them to undergo relative displacement, thus maintaining a higher degree of coaxiality and making the motor output performance more stable.

[0064] Specifically, in some embodiments, the stator bracket 400 has hollow interiors for the support member 411 and the pressure block 412, and the rotor shaft 110 passes sequentially through the support member 411 and the pressure block 412. The rotor shaft 110 is connected to the support member 411 and to the pressure block 412 via bearings 720. In this embodiment, by providing bearings between the rotor shaft 110 and the support member 411, and between the rotor shaft 110 and the pressure block 412, the stability of the installation can be improved, making it easier to maintain a high degree of coaxiality between the stator assembly 200 and the rotor assembly 100, resulting in more stable motor output performance.

[0065] See Figure 1 and Figure 2In some embodiments, the impeller 600 includes a connecting cover 610 and a plurality of fan blades 620 spaced circumferentially along the motor. Along the radial direction of the motor, the inner end of the connecting cover 610 is mounted to the rotor shaft 110 of the rotor assembly 100, and the outer end of the connecting cover 610 is connected to the fan blades 620 extending in a first direction. Along the first direction, the distance between the outer end of the connecting cover 610 and the mounting base 500 is smaller than the distance between the inner end of the connecting cover 610 and the mounting base 500. Specifically, the connecting cover 610 is approximately conical, and the radial distance between the connecting cover 610 and the rotor shaft 110 gradually decreases along the first direction. The inner end of the connecting cover 610 is connected to the outer periphery of the rotor shaft 110 and is close to the top end of the rotor shaft 110. The outer end of the connecting cover 610 is positioned lower, which means the starting end of the fan blade 620 is positioned lower, thereby making full use of the space outside the stator assembly 200, making the structure more compact, ensuring that the end position of the fan blade 620 is not too high, and that the overall axial dimension of the blower is not too large.

[0066] In some embodiments, the motor housing 710 is sleeved on the rotor shaft 110, and the motor housing 710 is located between the connecting cover 610 and the rotor housing 120. The motor housing 710 is fixedly connected to the mounting base 500 by screws, thereby surrounding the components located within the cavity defined by the two, and serving to isolate the external environment and protect the internal components. Preferably, a sealing ring is provided between the motor housing 710 and the mounting base 500 to enhance the sealing performance of the connection.

[0067] Preferably, in some embodiments, the rotor housing 120, the connecting cover 610, and the motor housing 710 extend in the same direction in at least a portion of their respective regions. Specifically, as shown in... Figure 2 As shown, the rotor housing 120, connecting cover 610, and motor housing 710 all extend not only radially outwards along the motor but also axially. For example, the outer end plate of the rotor housing 120 used to mount the magnet 130 is an annular plate that extends vertically (i.e., axially along the motor). The connecting cover 610 and motor housing 710 are also approximately annular in this region. Therefore, it can be approximated that within the height range of the outer end plate of the rotor housing 120, the rotor housing 120, connecting cover 610, and motor housing 710 extend in the same direction. Of course, besides the regions listed above, there are other similar regions, which are not listed here. This arrangement allows the rotor housing 120, connecting cover 610, and motor housing 710 to be more compactly distributed, resulting in smaller radial and axial dimensions. Preferably, without causing positional interference between the components, the extension directions of the three components can be made as identical as possible, i.e., the distance between any two is equal, to maximize compactness and reduce the overall size.

[0068] See Figure 3 and Figure 4In some embodiments, a first elastic buffer 540 is provided between the protrusion 420 and the mounting base 500, and both the protrusion 420 and the mounting base 500 are shaped to match the first elastic buffer 540. Specifically, the first elastic buffer 540 can be made of rubber or silicone. When the protrusion 420 and the mounting base 500 are fastened together with screws, the first elastic buffer 540 can play a shock-absorbing role to prevent excessive vibration transmitted to the stator assembly 200 and rotor assembly 100 due to external factors causing the mounting base 500 to shake, which could lead to displacement or even damage of components.

[0069] Specifically, in some embodiments, the mounting base 500 is provided with a mounting cavity 510 that matches the shape of the first elastic buffer 540. The first elastic buffer 540 is disposed within the mounting cavity 510 and includes a first buffer portion 541 and a second buffer portion 542 extending radially along the motor. Along the radial direction of the motor, the first buffer portion 541 is connected to the outer end of the second buffer portion 542, and the first buffer portion 541 extends circumferentially to both sides from the connection point between the second buffer portion 542 and the first buffer portion 541. Specifically, the shape and dimensions of the first elastic buffer 540 and the cavity wall of the mounting cavity 510 are matched, and the first elastic buffer 540 is located between the protrusion 420 and the cavity wall of the mounting cavity 510. The second buffer portion 542 is connected to the center position of the first buffer portion 541 along the circumferential direction of the motor, meaning the length of the first buffer portion 541 extending circumferentially to both sides from the connection point is equal. Correspondingly, the mounting cavity 510 is also configured to match the shape and size of the first buffer portion 541 and the second buffer portion 542, and the protruding member 420 is also configured to match the shape and size of the first buffer portion 541 and the second buffer portion 542. In the above embodiment, by setting the first buffer portion 541 and the second buffer portion 542 with different extension directions, and setting the protruding member 420 and the mounting cavity 510 to corresponding shapes, the cooperation between the first buffer portion 541 and the second buffer portion 542 and the corresponding positions of the mounting cavity 510 can achieve limiting in both the circumferential and radial directions. The first elastic buffer member 540 can be more stably installed in the mounting cavity 510 and is not easily displaced.

[0070] Furthermore, in some embodiments, the first elastic buffer 540 is provided with a limiting groove 543 that matches the shape of the protrusion 420. The protrusion 420 is disposed within the limiting groove 543 and has a protrusion 421. A first through hole 544 is provided at a corresponding position on the first elastic buffer 540, and a second through hole 511 is provided at a corresponding position on the mounting base 500. The protrusion 421 passes through the first through hole 544 and the second through hole 511 in sequence. Specifically, the two protrusions 421 are respectively disposed at both ends of the first buffer 541 along the circumferential direction. The protrusion 420 is disposed within the limiting groove 543, which can effectively limit the distance between the protrusion 420 and the first elastic buffer 540, making it less likely for the two to undergo relative displacement, thereby ensuring a better buffering and shock absorption effect. The protrusion 421 passes through the first through hole 544 and the second through hole 511 in sequence, which can further enhance the limiting effect and also enable rapid positioning during assembly.

[0071] See Figures 6 to 9 In some embodiments, the stator assembly 200 includes a resilient connection terminal 240 and a coil. The coil is electrically connected to the circuit board 300 through the resilient connection terminal 240. The resilient connection terminal 240 can elastically deform in any one of three perpendicular directions. When the coil and the circuit board 300 undergo relative displacement in space, the resilient connection terminal 240 can elastically deform to maintain the electrical connection after the relative displacement. Specifically, the bottom of the stator core 210 extends downward with a stator core connection terminal 230 electrically connected to the coil. The first end 248 of the resilient connection terminal 240 is electrically connected to the stator core connection terminal 230, and the last end 249 is electrically connected to the circuit board 300. The resilient connection terminal 240 is made of a conductive material with good elasticity. If the blower shakes due to external environmental influences, the coil and the circuit board 300 may experience excessive relative displacement, resulting in poor contact. By providing the elastic connection terminal 240, three-directional relative displacement space can be reserved between the coil and the circuit board 300. This ensures that even if relative displacement occurs, the electrical connection can be maintained through the elastic deformation of the elastic connection terminal 240, preventing the motor from stopping due to poor contact. Furthermore, it prevents deformation and damage to the coil or circuit board 300 due to rigid tension between them. Specifically, the elastic connection terminal 240 provides relative displacement space between the coil and the circuit board 300 in three directions: vertical, horizontal, and front-back. This ensures that even if relative displacement occurs in any of these directions, the electrical connection can be maintained through the elastic deformation of the elastic connection terminal 240, preventing motor stoppage due to poor contact and preventing deformation and damage to the coil or circuit board 300 due to rigid tension between them.

[0072] See Figures 6 to 9In some embodiments, the resilient connecting terminal 240 includes at least three plate-shaped resilient portions, wherein the intersection line of the plate surfaces of adjacent resilient portions serves as a connecting axis, allowing two adjacent resilient portions to rotate relative to each other around the connecting axis. The connecting axis between some adjacent resilient portions is a first type of connecting axis, and the connecting axis between some adjacent resilient portions is a second type of connecting axis. The axial direction of the first type of connecting axis is perpendicular to the axial direction of the second type of connecting axis. Specifically, the axial direction of the first type of connecting axis is considered a second direction, and the axial direction of the second type of connecting axis is considered a third direction, with the second direction perpendicular to the third direction. In the embodiment shown in the accompanying drawings, the resilient connecting terminal 240 includes a first resilient portion 241, a second resilient portion 242, and a third resilient portion 243 connected sequentially. Figure 9 From the perspective shown, the second direction is the vertical direction, the third direction is the front-back direction, and the length direction of the first elastic part 241 is the horizontal direction. The first elastic part 241 and the second elastic part 242 are connected by a first type of connecting shaft, allowing them to rotate relative to each other around the second direction. This accommodates the front-back displacement of the first elastic part 241 and the left-back displacement of the second elastic part 242. In reality, when the first elastic part 241 and the second elastic part 242 rotate relative to each other around the second direction, they can also accommodate minor left-back displacements of the first elastic part 241 and minor front-back displacements of the second elastic part 242. Since the displacement amounts are small, the following description will focus primarily on the main displacements. Similarly, the second elastic part 242 and the third elastic part 243 are connected by a second type of connecting shaft, allowing them to rotate relative to each other around the third direction. This accommodates the left-back displacement of the second elastic part 242 and the vertical displacement of the third elastic part 243. Therefore, this embodiment adapts to displacement in three directions—front-back, left-right, and up-down—by the relative rotation between the first elastic part 241, the second elastic part 242, and the third elastic part 243, thus reserving relative displacement space in three directions for the coil and the circuit board 300. This ensures that even if relative displacement occurs, the two can maintain electrical connection through the elastic deformation of the elastic connection terminal 240.

[0073] Preferably, in some embodiments, the connecting shafts of multiple sets of adjacent elastic portions are first-type connecting shafts, and / or, the connecting shafts of multiple sets of adjacent elastic portions are second-type connecting shafts. This configuration increases the range of rotation of the entire elastic connection terminal 240 around the second direction and / or the third direction, thereby accommodating larger displacements and providing greater relative displacement space for the coil and the circuit board 300. Specifically, the elastic connection terminal 240 includes a first elastic portion 241, a second elastic portion 242, a third elastic portion 243, a fourth elastic portion 244, a fifth elastic portion 245, a sixth elastic portion 246, a seventh elastic portion 2471, and an eighth elastic portion 2472 connected sequentially. Similar to the previous embodiment, the third elastic portion 243 and the fourth elastic portion 244 are also connected by second-type connecting shafts, allowing them to rotate relative to each other around the third direction, thereby accommodating the vertical displacement of the third elastic portion 243 and the horizontal displacement of the fourth elastic portion 244. The fourth elastic part 244 and the fifth elastic part 245 are also connected by a second type of connecting shaft, and can rotate relative to each other about a third direction, thereby accommodating the vertical displacement of the fifth elastic part 245 and the horizontal displacement of the fourth elastic part 244. The fifth elastic part 245 and the sixth elastic part 246 are also connected by a second type of connecting shaft, and can rotate relative to each other about a third direction, thereby accommodating the vertical displacement of the fifth elastic part 245 and the horizontal displacement of the sixth elastic part 246. The sixth elastic part 246 and the seventh elastic part 2471 are connected by a first type of connecting shaft, and can rotate relative to each other about a second direction, thereby accommodating the horizontal displacement of the sixth elastic part 246 and the forward / backward displacement of the seventh elastic part 2471. The seventh elastic part 2471 and the eighth elastic part 2472 are also connected by a first type of connecting shaft, and can rotate relative to each other about a second direction. Since the surfaces of the seventh elastic part 2471 and the eighth elastic part 2472 are at an angle to the surface of the first elastic part 241, compared to the previous embodiment which accommodated the small displacement of the first elastic part 241 in the left-right direction and the small displacement of the second elastic part 242 in the front-back direction, this embodiment can accommodate the larger displacement of the sixth elastic part 246 in both the left-right and front-back directions, and the larger displacement of the seventh elastic part 2471 in both the left-right and front-back directions. Of course, in addition to the embodiment shown in the figures, the number of elastic parts can be increased to accommodate even larger displacements.

[0074] Preferably, any two adjacent elastic parts have a smooth transition, so that relative rotation between adjacent elastic parts is less likely to cause breakage at the connection point. For example, any two adjacent elastic parts can have rounded corners.

[0075] Alternatively, in some other embodiments, the resilient connection terminal includes a first resilient member and a second resilient member, both cylindrical in shape. One end of the first resilient member along its axial direction is connected to one end of the second resilient member along its axial direction. An angle exists between the axial directions of the first and second resilient members, and the first and second resilient members are rotatable relative to their connection point. Figure 9 Taking the first elastic part 241 and the second elastic part 242 as examples, for instance, both the first elastic part 241 and the second elastic part 242 are cylindrical. When the two rotate relative to each other, the first elastic part 241 can rotate up and down and also rotate forward and backward, and the second elastic part 242 can rotate up and down and also rotate left and right. Therefore, displacement in three directions (up, down, left, right, and forward and backward) can be accommodated by just two elastic elements, which provides relative displacement space in three directions for the coil and the circuit board 300, so that even if the two are relatively displaced, the electrical connection can be maintained by the elastic deformation of the elastic connection terminal 240.

[0076] See Figure 4 , Figures 6 to 9 In some embodiments, the circuit board 300 is provided with a clearance hole 320 for the stator support 400 to pass through. The first end 248 of the elastic connection terminal 240 is electrically connected to the coil, and the last end 249 of the elastic connection terminal 240 is electrically connected to the circuit board 300. Along a first direction, the first end 248 and the last end 249 are respectively located on both sides of the circuit board 300, and the middle section of the elastic connection terminal 240 located between the first end 248 and the last end 249 is located within the clearance hole 320. Specifically, the first end 248 of the elastic connection terminal 240 is located above the circuit board 300, and the last end 249 of the elastic connection terminal 240 is located below the circuit board 300. The base 410 passes through the clearance hole 320, and there is a gap between the base 410 and the wall of the clearance hole 320. The middle section of the elastic connection terminal 240 located between the first end 248 and the last end 249 can be disposed in this gap. Specifically, the first end 248 of the flexible connection terminal 240 extends downward and inward from the stator core connection terminal 230 to the aforementioned gap, and continues downward to the bottom of the circuit board 300, then extends outward and upward to insert into the slot 310 provided on the circuit board 300. Since the flexible connection terminal 240 includes multiple flexible connection portions 241 and flexible transition portions 242, its overall size is slightly large. By accommodating its middle section in the clearance hole 320, the space within the clearance hole 320 can be fully utilized, reducing the distance between the stator assembly 200 and the circuit board 300, thereby making the overall axial dimension of the blower smaller.

[0077] See Figures 10 to 12 In some embodiments, the vehicle ventilation system includes the blower 810 as described in any of the above embodiments, and also includes a blower connector 820, to which the blower 810 is mounted. It should be noted that... Figures 10 to 12The blower 810 in the image is only used to illustrate its installation method; the specific structure is as follows: Figure 1 As shown.

[0078] See Figures 10 to 12 In some embodiments, the blower connector 820 is an air conditioning unit, and the blower 810 is detachably connected to the air conditioning unit. Specifically, the blower 810 and the blower connector 820 are snap-fit ​​connected. For example, the blower 810 is provided with a hook 811, and the blower connector 820 is provided with a corresponding locking block 821. The locking block 821 engages with the hook 811 to achieve a fixed connection. In other embodiments, the positions of the locking block 821 and the hook 811 can be interchanged, or the number of locking blocks 821 and hooks 811 can be increased in pairs to make the installation more secure. In other embodiments, the blower 810 and the blower connector 820 can also be connected by screws or other threaded fasteners. Preferably, the blower 810 is also provided with a limiting hole 812, and the blower connector 820 is provided with a limiting post 822 at a corresponding position. The limiting post 822 is inserted into the limiting hole 812 for quick positioning during installation. In other embodiments, the positions of the limiting post 822 and the limiting hole 812 can be interchanged, or the number of limiting posts 822 and limiting holes 812 can be increased in pairs.

[0079] See Figures 10 to 12 In some embodiments, a second elastic buffer 830 is provided between the blower 810 and the blower connector 820. Specifically, in some embodiments, the blower 810 is provided with a first groove 813, and the blower connector 820 is provided with a corresponding second groove 823. When the blower 810 is installed on the blower connector 820, the second elastic buffer 830 is engaged between the groove wall of the first groove 813 and the groove wall of the second groove 823, and there is a gap between the end face of the blower 810 and the end face of the blower connector 820. Specifically, the first elastic buffer 540 can be made of rubber or silicone. When the blower 810 is installed on the blower connector 820, the second elastic buffer 830 is deformed by the compression of the groove walls of the first groove 813 and the second groove 823. When the blower 810 is installed on the blower connector 820, there is still a gap between the end face of the blower 810 and the end face of the blower connector 820. Therefore, when the blower 810 is working, the vibration it generates can be buffered to a large extent by the second elastic buffer 830, reducing the vibration amplitude and vibration noise transmitted to the blower connector 820.

[0080] In some embodiments, the length directions of the first groove 813 and the second groove 823 are both along the circumference of the blower 810, the width directions of the first groove 813 and the second groove 823 are both along the radial direction of the blower 810, and the height directions of the first groove 813 and the second groove 823 are both along the axial direction of the blower 810; along the radial direction of the blower 810, the groove walls of the first groove 813 and the second groove 823 extend in an arc shape. Specifically, taking the first groove 813 as an example, along the radial direction of the blower 810, the inner and outer ends of the groove are deeper, and the middle is shallower; the second groove 823 has a similar shape to the first groove 813. This arrangement can more stably hold the second elastic buffer 830, making it less likely to fall off, thereby achieving better shock absorption.

[0081] Preferably, the groove walls of the first groove 813 and the second groove 823 are formed by intersecting horizontal and vertical ribs. This arrangement can make the thickness of the blower 810 and the blower connector 820 more uniform in various circumferential areas, avoiding the occurrence of excessively large local dimensions on the blower 810 and the blower connector 820 in order to form the first groove 813 and the second groove 823, and making it easier to demold after injection molding.

[0082] In some embodiments, the maximum compression of the second elastic buffer 830 is b. The second elastic buffer 830 is engaged between the groove wall of the first groove 813 and the groove wall of the second groove 823. When the second elastic buffer 830 is not compressed, the gap between the end face of the blower 810 and the end face of the blower connector 820 is a, b < a, and 0.7 ≤ b / a ≤ 0.9. When the second elastic buffer 830 is not compressed, the gap 'a' between the end face of the blower 810 and the end face of the blower connector 820 is greater than the maximum compression amount 'b' of the second elastic buffer 830. Therefore, even if the second elastic buffer 830 reaches its maximum compression amount, a gap will still exist between the end face of the blower 810 and the end face of the blower connector 820. This ensures that after the blower 810 and the blower connector 820 are fixedly installed, the second elastic buffer 830 can provide shock absorption and prevent the end face of the blower 810 from colliding with the end face of the blower connector 820 during vibration, thus preventing damage. When b / a meets the above range, it ensures that after the blower 810 and the blower connector 820 are fixedly installed, the gap between them will not be too large, making it difficult for dust and debris to enter; it also ensures that the gap between them will not be too small, preventing the end face of the blower 810 from colliding with the end face of the blower connector 820 during vibration. The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0083] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A blower characterised in that, The motor comprises a rotor assembly (100), a stator assembly (200), a circuit board (300) and a motor shell (710), the stator assembly (200) and the circuit board (300) are electrically connected; A mounting seat (500) is arranged, the circuit board (300) is mounted on the mounting seat (500), the motor shell (710) and the mounting seat (500) are connected, and the stator assembly (200) and the circuit board (300) are arranged in a cavity defined between the motor shell (710) and the mounting seat (500); A stator support (400) is arranged, the mounting seat (500) and the stator support (400) are arranged along a first direction and connected, the mounting seat (500), the circuit board (300) and the stator assembly (200) are arranged along the first direction, the stator support (400) comprises a base (410), the base (410) passes through the circuit board (300) and the stator assembly (200) in sequence, the base (410) comprises a support (411) and a pressing block (412) arranged along the first direction, an outer peripheral portion at a connection position of the support (411) and the pressing block (412) is provided with a mounting groove (413), the stator assembly (200) comprises a mounting piece (250) extending into the mounting groove (413), and the support (411) and the pressing block (412) are fixedly connected through a fastener to clamp and fix the mounting piece (250) to a groove wall of the mounting groove (413); A impeller (600) is arranged, the impeller (600) is connected with a rotor shaft (110) of the rotor assembly (100), and the impeller (600) can rotate around the first direction under the driving of the motor. The stator support (400) comprises at least one extending piece (420) extending outward from an outer peripheral portion of the base (410), the extending piece (420) is connected with the mounting seat (500), the extending piece (420) is located between the circuit board (300) and the mounting seat (500), the mounting seat (500) is provided with a circuit board fixing piece (520) extending towards the first direction and connected with the circuit board (300), and a projection of the circuit board fixing piece (520) and the extending piece (420) on the circuit board (300) along the first direction is staggered.

2. The air blower of claim 1, wherein The outer peripheral portion of the base (410) extends a plurality of extending pieces (420) distributed along the circumference of the motor, and the circuit board fixing piece (520) extends to the circuit board (300) through adjacent extending pieces (420).

3. The air blower of claim 2, wherein ​ 4. The air blower of claim 1, wherein The rotor assembly (100) comprises a magnetic tile (130) and a rotor shell (120), the rotor shaft (110) passes through the stator support (400) and both are connected through a bearing (720), the rotor shell (120) is sleeved on the rotor shaft (110) and extends to the outside of the outer peripheral part of the stator assembly (200), the magnetic tile (130) is installed on the inner wall of the rotor shell (120), and the magnetic tile (130) and the stator assembly (200) are arranged along the radial direction of the motor.

5. The air blower of claim 4, wherein The stator support (400) comprises a base (410) and at least one protruding piece (420) protruding outward from the outer peripheral part of the base (410), the protruding piece (420) is connected with the mounting seat (500), the base (410) passes through the circuit board (300) and the stator assembly (200) in turn, the base (410) comprises a support (411) and a pressing block (412) arranged along the first direction, the support (411) and the pressing block (412) are fixedly connected by a fastener to clamp and fix the stator assembly (200), the rotor shaft (110) passes through the support (411) and the pressing block (412), and the rotor shaft (110) and the support (411) and the rotor shaft (110) and the pressing block (412) are provided with the bearing (720).

6. The air blower of claim 1, wherein The impeller (600) comprises a connecting cover (610) and a plurality of blades (620) arranged along the circumference of the motor, along the radial direction of the motor, the inner end of the connecting cover (610) is installed on the rotor shaft (110) of the rotor assembly (100), the outer end of the connecting cover (610) is connected with the blade (620) protruding in the first direction, along the first direction, the distance between the outer end and the mounting seat (500) is less than the distance between the inner end and the mounting seat (500); the motor shell (710) is located between the connecting cover (610) and the rotor shell (120) of the rotor assembly (100), the rotor shell (120), the connecting cover (610) and the motor shell (710) have the same extension direction in at least part of the area.

7. The air blower of claim 1, wherein The stator support (400) comprises a base (410) and at least one protruding piece (420) protruding outward from the outer peripheral part of the base (410), the protruding piece (420) is connected with the mounting seat (500), the first elastic buffer (540) is arranged between the protruding piece (420) and the mounting seat (500), and the protruding piece (420) and the mounting seat (500) are both matched with the shape of the first elastic buffer (540).

8. The air blower of claim 7, wherein The mounting base (500) is provided with a mounting cavity (510) matching the shape of the first elastic buffer (540), the first elastic buffer (540) is arranged in the mounting cavity (510), the first elastic buffer (540) comprises a first buffer part (541) and a second buffer part (542) extending along the radial direction of the motor, the first buffer part (541) is connected to the outer end of the second buffer part (542) along the radial direction of the motor, and the first buffer part (541) extends to both sides along the circumferential direction of the motor from the connection between the second buffer part (542) and the first buffer part (541).

9. The air blower of claim 8, wherein The first elastic buffer (540) is provided with a limiting groove (543) matching the shape of the protruding part (420), the protruding part (420) is arranged in the limiting groove (543), the protruding part (420) is provided with a protruding part (421), the first elastic buffer (540) is provided with a first through hole (544) at the corresponding position, and the mounting base (500) is provided with a second through hole (511) at the corresponding position, and the protruding part (421) passes through the first through hole (544) and the second through hole (511) in sequence.

10. The air blower of claim 1, wherein The stator assembly (200) comprises an elastic connection terminal (240) and a coil, the coil is electrically connected to the circuit board (300) through the elastic connection terminal (240), the elastic connection terminal (240) can be elastically deformed along any one of the three directions perpendicular to each other, and when the coil and the circuit board (300) relatively displace in space, the elastic connection terminal (240) can be elastically deformed to keep the coil and the circuit board (300) electrically connected after relative displacement.

11. The air blower of claim 10, wherein The elastic connection terminal comprises a first elastic part and a second elastic part which are both cylindrical, one end of the first elastic part along the axial direction thereof is connected to one end of the second elastic part along the axial direction thereof, the axial direction of the first elastic part and the axial direction of the second elastic part form an angle, and the first elastic part and the second elastic part can rotate relative to the connection therebetween.

12. The air blower of claim 10, wherein, The elastic connection terminal (240) comprises at least three elastic parts which are all plate-shaped, the plate faces of adjacent elastic parts intersect to form a connection shaft, adjacent two elastic parts can relatively rotate around the connection shaft, the connection shaft between some adjacent elastic parts is a first type of connection shaft, the connection shaft between some adjacent elastic parts is a second type of connection shaft, and the axial direction of the first type of connection shaft is perpendicular to the axial direction of the second type of connection shaft.

13. The air blower of claim 12, wherein, The connection shafts of multiple groups of adjacent elastic parts are the first type of connection shafts, and / or the connection shafts of multiple groups of adjacent elastic parts are the second type of connection shafts.

14. The air blower of claim 10, wherein, The circuit board (300) is provided with an avoiding hole (320) for the stator support (400) to pass through, a head end (248) of the elastic connecting terminal (240) is electrically connected to the coil, a tail end (249) of the elastic connecting terminal (240) is electrically connected to the circuit board (300), along the first direction, the head end (248) and the tail end (249) are respectively located on two sides of the circuit board (300), and a middle section of the elastic connecting terminal (240) between the head end (248) and the tail end (249) is located in the avoiding hole (320).

15. A ventilation system for a vehicle, characterized in that The blower (810) according to any one of claims 1 to 14, further comprising a blower connecting piece (820), wherein the blower (810) is mounted on the blower connecting piece (820).

16. The in-vehicle ventilation system of claim 15, wherein, Further comprising a second elastic buffer (830), wherein the blower (810) is provided with a first groove (813), the blower connecting piece (820) is provided with a second groove (823), when the blower (810) is mounted on the blower connecting piece (820), the second elastic buffer (830) is clamped between the groove wall of the first groove (813) and the groove wall of the second groove (823), and the end face of the blower (810) and the end face of the blower connecting piece (820) have a gap.

17. The in-vehicle ventilation system of claim 16, wherein, The length direction of the first groove (813) and the second groove (823) is along the circumferential direction of the blower (810), the width direction of the first groove (813) and the second groove (823) is along the radial direction of the blower (810), the height direction of the first groove (813) and the second groove (823) is along the axial direction of the blower (810), and along the radial direction of the blower (810), the groove wall of the first groove (813) and the groove wall of the second groove (823) extend in an arc shape.

18. The in-vehicle ventilation system of claim 16, wherein, The maximum compression amount of the second elastic buffer (830) is b, the gap between the end face of the blower (810) and the end face of the blower connecting piece (820) when the second elastic buffer (830) is not compressed is a, b < a, and 0.7 ≤ b / a ≤ 0.9.

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