Fan and air conditioner

Abstract

The invention discloses a draught fan and an air conditioner, and relates to the technical field of draught fans, the draught fan comprises a wind wheel, a rotor assembly, a stator assembly and a bearing assembly, the rotor assembly is fixedly connected to a first hub of the wind wheel, and therefore the rotor assembly can drive the wind wheel to rotate together when rotating. The fixing shaft of the stator assembly is fixedly connected to the stator shell, the stator winding is arranged on the stator iron core, and the stator iron core is fixedly connected to the stator shell and located in the space defined by the rotor assembly. The bearing assembly is fixedly connected to the first hub, and a bearing is connected with the fixing shaft. Therefore, through cooperation of the stator core and the rotor assembly, the wind wheel rotates relative to the fixed shaft. The stator winding and the bearing are arranged at intervals along the axial direction of the stator assembly, namely, the bearing is far away from the heating source and the electromagnetic source, so that electromotive force generated by cutting magnetic induction lines by the bearing can be effectively reduced, the problem of relatively serious bearing electrocorrosion is improved, and the service life of the bearing is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of fans, and particularly to a fan and an air conditioner. Background Art

[0002] In the related art, the impeller of an air conditioner is drivingly connected to a motor. When the motor operates, due to the magnetic reluctance imbalance of the stator core, an alternating electromotive force is likely to be generated; when the magnetic poles of the motor rotate, the magnetic flux linked with the bearing alternates, generating an axial voltage. Usually, the lubricating oil film of the bearing can play a certain insulating role, and no axial current is generated in the bearing. However, when the axial voltage is relatively high, or when the motor just starts, or after the motor has been running for a long time, the axial voltage is likely to break down the lubricating oil film to form a loop and generate an axial current, resulting in the problem of electrical corrosion of the bearing. The bearing is prone to vibration and noise, and more seriously, it will cause the bearing to fail and reduce the service life of the bearing. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. For this purpose, the present invention provides a fan, by axially spacing the stator core and the bearing apart, the bearing is far from the electromagnetic source, thus improving the problem of electrical corrosion of the bearing.

[0004] The present invention also provides an air conditioner having the above-mentioned fan.

[0005] The fan according to the first aspect embodiment of the present invention includes:

[0006] An impeller, including a first hub;

[0007] A stator assembly, including a stator housing, a stator core, a stator winding, and a fixed shaft. The fixed shaft is fixedly connected to the stator housing, the stator winding is disposed on the stator core, and the stator winding and the stator core are fixedly connected to the stator housing;

[0008] A rotor assembly, fixedly connected to the first hub and disposed around the stator core;

[0009] A bearing assembly, fixedly connected within the first hub. The bearing assembly includes a bearing, and the bearing is connected to the fixed shaft so that the impeller can rotate relative to the fixed shaft;

[0010] Wherein, the stator winding and the bearing are axially spaced apart along the stator assembly.

[0011] The fan according to the embodiment of the present invention has at least the following beneficial effects:

[0012] By setting the rotor assembly fixedly connected to the first hub of the wind wheel, the rotor assembly can drive the wind wheel to rotate together when it rotates. The fixed shaft of the stator assembly is fixedly connected to the stator housing, the stator core is fixedly connected to the stator housing and is located within the space surrounded by the rotor assembly, and the stator winding is disposed on the stator core. The bearing assembly is fixedly connected to the first hub, and the bearing is connected to the fixed shaft. Therefore, through the cooperation of the stator core and the rotor assembly, the wind wheel rotates relative to the fixed shaft. Since the wind blades are connected to the rotor assembly through the first hub, the jumping amplitude of the wind wheel can be reduced, and the reliability of the wind turbine can be improved. The fixed shaft is fixed to the stator housing, so the fixed shaft mainly plays a supporting role, hardly bears torque, the strength requirement for the fixed shaft is reduced, the cost is reduced, and the reliability is improved. The stator winding and the bearing are arranged at intervals along the axial direction of the stator assembly, and the bearing is far away from the heat source and the electromagnetic source, which can effectively reduce the electromotive force generated by the bearing cutting the magnetic induction line, thereby improving the problem of relatively serious electrical corrosion of the bearing and increasing the service life of the bearing.

[0013] According to some embodiments of the present invention, the bearing assembly further includes a second hub located within the first hub, the bearing is disposed within the second hub, the stator assembly further includes at least one water diversion rib, the water diversion rib is disposed on the end wall of the stator housing facing the bearing, and the water diversion rib is used to divert the water above the second hub to both sides of the second hub.

[0014] According to some embodiments of the present invention, the middle of the water diversion rib is located above the second hub, and both ends extend downward and to both sides of the bearing respectively.

[0015] According to some embodiments of the present invention, both ends of the water diversion rib are located below the second hub.

[0016] According to some embodiments of the present invention, the end wall of the stator housing facing the bearing bulges outward to form a boss, the wind turbine further includes a water baffle, the water baffle is sleeved on the fixed shaft and abuts against the boss, and a water tank is formed between the water baffle, the boss and the stator housing. Along the axial direction of the stator assembly, the width of the water tank is greater than the height of the water diversion rib.

[0017] According to some embodiments of the present invention, the end wall of the stator housing facing the bearing bulges outward to form a boss, the wind turbine further includes a water baffle, the water baffle is sleeved on the fixed shaft and abuts against the boss.

[0018] According to some embodiments of the present invention, the bearing assembly further includes a second hub located within the first hub, the bearing is disposed within the second hub, and the water baffle is disposed within the second hub.

[0019] According to some embodiments of the present invention, the blower further includes an elastic member and a locking member respectively located at two ends of the bearing, the locking member is connected to the fixed shaft, and two ends of the elastic member respectively abut against the inner ring of the bearing and the stator housing, so that the bearing abuts against the locking member.

[0020] According to some embodiments of the present invention, the stator housing is provided with an annular groove, the annular groove is arranged around the circumference of the stator core, and a part of the first hub and the rotor assembly is inserted into the annular groove.

[0021] According to some embodiments of the present invention, the stator housing forms a cavity inside the stator core, and the stator housing is provided with a first through hole communicating the cavity and the inside of the first hub.

[0022] According to some embodiments of the present invention, the stator assembly further includes an end cover, the end cover is fixedly connected to the end wall of the stator housing away from the bearing, and the end cover is provided with a second through hole communicating with the cavity.

[0023] According to some embodiments of the present invention, the bearing assembly further includes a bearing seat, a positioning portion is provided at one end of the bearing seat away from the stator core, and the bearing abuts against the positioning portion.

[0024] According to some embodiments of the present invention, the bearing assembly further includes a second hub located inside the first hub, a baffle is connected between the second hub and the first hub, at least one heat dissipation rib is provided on the inner side of the baffle, and the bearing seat is fixedly connected inside the second hub.

[0025] According to some embodiments of the present invention, the baffle is provided with at least one third through hole, and the third through hole communicates the inner side and the outer side of the baffle.

[0026] According to some embodiments of the present invention, the heat dissipation ribs extend along the radial direction of the first hub and are provided in plurality, and the plurality of heat dissipation ribs are arranged at intervals along the circumferential direction of the first hub.

[0027] According to some embodiments of the present invention, the rotor assembly includes a magnetic ring, and the magnetic ring is connected to the inner side wall of the first hub.

[0028] An air conditioner according to an embodiment of the second aspect of the present invention includes the blower described in the above embodiments.

[0029] The air conditioner according to the embodiment of the present invention has at least the following beneficial effects:

[0030] The fan adopting the embodiment of the first aspect has a rotor assembly fixedly connected to the first hub of the wind wheel. Therefore, when the rotor assembly rotates, it can drive the blades to rotate together. The fixed shaft of the stator assembly is fixedly connected to the stator housing. The stator core is fixedly connected to the stator housing and is located within the space surrounded by the rotor assembly. The stator winding is arranged on the stator core. The bearing assembly is fixedly connected to the first hub, and the bearing is connected to the fixed shaft. Therefore, through the cooperation of the stator core and the rotor assembly, the wind wheel rotates relative to the fixed shaft. Since the blades are connected to the rotor assembly through the first hub, the jumping amplitude of the wind wheel can be reduced, and the reliability of the fan can be improved. The fixed shaft is fixed to the stator housing. Therefore, the fixed shaft mainly plays a supporting role, hardly bears torque, the strength requirement for the fixed shaft is reduced, the cost is reduced, and the reliability is improved. The stator winding and the bearing are arranged at intervals along the rotation axis direction of the wind wheel. The bearing is far from the heat source and the electromagnetic source, which can effectively reduce the electromotive force generated by the bearing cutting the magnetic induction line, thereby improving the problem of relatively serious electrical corrosion of the bearing and increasing the service life of the bearing.

[0031] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The present invention will be further described below in conjunction with the drawings and embodiments, where:

[0033] Figure 1 is a schematic structural diagram of a fan according to an embodiment of the present invention;

[0034] Figure 2 is an exploded view of a fan according to an embodiment of the present invention;

[0035] Figure 3 is an exploded view of a wind wheel and a rotor assembly according to an embodiment of the present invention;

[0036] Figure 4 is a cross-sectional view of a fan according to an embodiment of the present invention with the blades hidden;

[0037] Figure 5 is Figure 4 an enlarged view of part A in

[0038] Figure 6 is a cross-sectional view of a fan according to another embodiment of the present invention with the blades hidden

[0039] Figure 7 is a schematic structural diagram of a wind wheel according to an embodiment of the present invention;

[0040] Figure 8 is a schematic structural diagram of a stator assembly according to an embodiment of the present invention;

[0041] Figure 9 Partial structural schematic diagram of a stator assembly according to an embodiment of the present invention;

[0042] Figure 10 Structural schematic diagram of a bearing housing according to an embodiment of the present invention.

[0043] Reference numerals in the drawings:

[0044] Fan 1000;

[0045] Wind wheel 100; first hub 110; wind blade 120; second hub 130; heat dissipation ribs 131; baffle 132; reinforcing ribs 133; third through hole 134; first channel 140; second channel 150; third channel 160;

[0046] Rotor assembly 200; magnetic ring 210;

[0047] Stator assembly 300; stator housing 310; boss 311; water baffle 312; annular groove 313; mounting ear 314; peripheral edge 315; water leakage hole 316; first through hole 317; cavity 318; water tank 319; stator core 320; insulating frame 321; fixed shaft 330; water diversion ribs 340; flow guiding ribs 341; end cover 350; second through hole 351; inner end face 360; outer end face 370; arc surface 380; stator winding 390;

[0048] Bearing assembly 400; bearing 410; elastic member 430; locking member 440; nut 441; gasket 442; bearing housing 450; positioning portion 451. Detailed implementation manners

[0049] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0050] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as up and down, etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0051] In the description of the present invention, "plurality" means more than two. If the first and second are described, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0052] In the description of the present invention, unless otherwise clearly defined, terms such as "arrangement", "installation", "connection", etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0053] Referring to Figure 1 、 Figure 2 and Figure 3 As shown in Figure 8 and 9 In the embodiment of the present invention, the fan 1000 includes a wind wheel 100, a rotor assembly 200, a stator assembly 300 and a bearing assembly 400. The wind wheel 100 includes a first hub 110 and blades 120 connected to the outer peripheral wall of the first hub 110. There are multiple blades 120, which are arranged at intervals along the circumferential direction of the first hub 110. The multiple blades 120 can improve the operation stability and working efficiency of the fan 1000. The rotor assembly 200 is fixedly connected to the first hub 110. For example, the rotor assembly 200 includes a magnetic ring 210, and the magnetic ring 210 is fixedly connected to the inner wall of the first hub 110; or the rotor assembly 200 includes multiple permanent magnetic materials, and the multiple permanent magnetic materials are arranged in the form of magnetic poles and fixedly connected to the first hub 110. Referring to Figure 4 As shown in

[0054] It can be understood that by setting the rotor assembly 200 fixedly connected to the first hub 110 of the wind wheel 100, the rotor assembly 200 can drive the wind blades 120 to rotate together when it rotates. The bearing assembly 400 is fixedly connected to the first hub 110, and the bearing 410 is connected to the fixed shaft 330. Therefore, through the cooperation of the stator core 320 and the rotor assembly 200, the wind wheel 100 rotates relative to the fixed shaft 330. Since the wind blades 120 are connected to the rotor assembly 200 through the first hub 110, compared with the prior art solution where the wind wheel is connected to the rotating shaft of the motor, the cantilever beam of the wind wheel 100 (i.e., reducing the torque of the wind wheel 100) can be shortened in this embodiment, the jumping amplitude of the wind wheel 100 can be reduced, and the reliability of the fan 1000 can be improved. The fixed shaft 330 is fixed to the stator housing 310. Therefore, the fixed shaft 330 mainly plays a supporting role, hardly bears torque, the strength requirement for the shaft is reduced, the cost is reduced, and the reliability is improved. The stator winding 390 and the bearing 410 are arranged at intervals along the rotation axis direction of the wind wheel 100. The stator winding 390 is the main heat source and electromagnetic source. That is, the bearing 410 is far from the heat source and electromagnetic source, which can effectively reduce the electromotive force generated by the bearing 410 due to cutting the magnetic induction line, avoid or reduce the current generated in the bearing 410, improve the situation where the electric energy is released locally at the bearing 410 to generate high temperature, melt the small areas of the inner raceway and outer raceway of the bearing 410 and form multiple strip-shaped grooves, and thus improve the problem of relatively serious electrical corrosion of the bearing 410 and increase the service life of the bearing 410.

[0055] In order to improve the problem that the fan 1000 is prone to water ingress or entry of foreign matters such as insects and dust, referring to Figure 4 As shown, in the embodiment of the present invention, the stator housing 310 is provided with an annular groove 313. The annular groove 313 is arranged circumferentially around the stator core 320. Part of the structures of the first hub 110 and the rotor assembly 200 are inserted into the annular groove 313 and separated from the inner wall of the annular groove 313 to prevent the first hub 110 and the rotor assembly 200 from contacting the inner wall of the annular groove 313 during rotation. Therefore, a first channel 140, a second channel 150, and a third channel 160 that are sequentially communicated are formed between the first hub 110, the rotor assembly 200, and the annular groove 313. The first channel 140 extends along the axial direction of the fan 1000, the second channel 150 extends along the radial direction of the fan 1000, and the third channel 160 extends along the axial direction of the fan 1000. Therefore, the first channel 140, the second channel 150, and the third channel 160 form a structure similar to a maze, and the gap between the first channel 140 and the second channel 150 is between 0.5 mm and 1.5 mm, and the gap of the third channel 160 is between 0.2 mm and 1 mm, which can effectively reduce the entry of water or foreign matters such as insects and dust into the interior of the first hub 110 through the first channel 140, the second channel 150, and the third channel 160.

[0056] Refer to Figure 4 and Figure 7 As shown, in an embodiment of the present invention, the bearing assembly 400 further includes a second hub 130 located within the first hub 110. The second hub 130 is fixedly connected to and coaxially arranged with the first hub 110, and a bearing 410 is installed within the second hub 130. Refer to Figure 8 As shown, the stator assembly 300 further includes at least one water diversion rib 340. The water diversion rib 340 is provided on the end wall of the stator housing 310 facing the bearing 410. The water diversion rib 340 is used to divert the water above the second hub 130 to both sides of the second hub 130. It can be understood that during the operation of the fan 1000, water may enter due to condensation water, rain, etc. The water enters the interior of the first hub 110 through the first channel 140, the second channel 150, and the third channel 160, and the flow direction is as Figure 4 shown Figure 4 The dotted arrow in indicates the flow direction of the water. Since the bearing 410 is a metal part, when the bearing 410 gets water, it is likely to cause adverse effects such as rusting and lubrication failure. Therefore, by providing the water diversion rib 340, the water can be diverted to both sides of the second hub 130, thereby reducing the situation where water enters the second hub 130 and causes the bearing 410 to be soaked in water. It can improve the overall waterproof performance of the fan 1000 and avoid the influence of water ingress on the realization of the functions of key parts.

[0057] Refer to Figure 8 As shown, in an embodiment of the present invention, the water diversion rib 340 is strip-shaped and protrudes from the end face of the stator housing 310. The middle part of the water diversion rib 340 is located above the second hub 130, and both ends of the water diversion rib 340 are located on both sides of the bearing 410 and extend downward, and can extend below the second hub 130 to further reduce the situation of water entering the bearing 410. Therefore, when the water flows down from above the stator housing 310, the middle part of the water diversion rib 340 diverts the water downward to both sides of it, thereby effectively reducing the situation of water entering the second hub 130 and being able to reduce the risks such as rusting and lubrication failure of the bearing 410.

[0058] Continue to refer to Figure 8As shown, in the embodiments of the present invention, multiple water dividing ribs 340 may be provided, and the multiple water dividing ribs 340 are arranged at intervals in the up-down direction. For example, three water dividing ribs 340 are provided, namely a first water dividing rib 340a, a second water dividing rib 340b, and a third water dividing rib 340c. The first water dividing rib 340a, the second water dividing rib 340b, and the third water dividing rib 340c are arranged at intervals in sequence in the up-down direction. It should be noted that the first water dividing rib 340a, the second water dividing rib 340b, and the third water dividing rib 340c all have functions such as flow splitting and flow guiding. There may be adaptive differences in their structures, but they all belong to specific implementation forms of the water dividing rib 340. When the water inflow is relatively large and causes the water to cross the first water dividing rib 340a, the second water dividing rib 340b can still play a role in guiding the water to both sides of the bearing 410; assuming that the water further crosses the second water dividing rib 340b, the third water dividing rib 340c can also play a role in guiding the water to both sides of the bearing 410, so the waterproof performance of the fan 1000 can be further improved.

[0059] Continue to refer to Figure 8 As shown, in the embodiments of the present invention, two flow guiding ribs 341 are provided between two adjacent water dividing ribs 340. One ends of the two flow guiding ribs 341 close to each other are connected to the water dividing rib 340 located above among the two adjacent water dividing ribs 340, and the other ends of the two flow guiding ribs 341 away from each other extend downward and to both sides. One ends of the two flow guiding ribs 341 close to each other may be arranged to be connected and connected to the middle position of the water dividing rib 340. As an alternative implementation manner, the structure of the two flow guiding ribs 341 may also be replaced by a rib strip with an arc transition. When the water inflow is relatively large, the water crosses the water dividing rib 340 located above, and the flow guiding ribs 341 play a role in secondary flow splitting and guide the water to both sides of the bearing 410, inhibiting the water flow from entering the bearing 410. In addition, the flow guiding ribs 341 also have the function of strengthening the strength of the water dividing rib 340, making the mold easy to implement and improving the manufacturability.

[0060] Continue to refer to Figure 8As shown, in the embodiment of the present invention, two guide ribs 341 are provided between each two adjacent water-dividing ribs 340. Take one group of guide ribs 341 located between the first guide rib 341a and the second guide rib 341b as an example for explanation, the two guide ribs 341 are respectively the first guide rib 341a and the second guide rib 341b, the first guide rib 341a and the second guide rib 341b are arranged at an angle, the upper end of the first guide rib 341a and the upper end of the second guide rib 341b are both connected to the middle position of the water-dividing rib 340 located above, and the lower end of the first guide rib 341a and the lower end of the second guide rib 341b are respectively extended downward and to both sides. By providing the first guide rib 341a and the second guide rib 341b, the waterproof performance of the fan 1000 can be further improved, and the situation of crossing the water-dividing rib 340 due to the excessive flow rate of water can be effectively reduced.

[0061] Reference Figure 4 and Figure 8 As shown, in the embodiment of the present invention, the end wall of the stator housing 310 facing one end of the bearing 410 protrudes outward to form a boss 311, and the fan 1000 further includes a water retaining sheet 312, which is sleeved on the fixed shaft 330 and abuts against the boss 311. When the water flows over the water dividing rib 340 and flows toward the fixed shaft 330, the water retaining sheet 312 can prevent the water from contacting the bearing 410, thereby improving the reliability of the bearing 410 and further reducing the risk of the bearing 410 rusting and failing.

[0062] Reference Figure 4 and Figure 5 As shown, in the embodiment of the present invention, the water retaining sheet 312 is built into the second hub 130, and a water groove 319 is formed between the water retaining sheet 312, the boss 311 and the end wall of the stator housing 310. The water groove 319 is arranged around the boss 311, and the second hub 130 extends to the top of the water groove 319 at one end facing the stator core 320. It can be understood that when water flows from top to bottom, the water can only flow to the water groove 319 under the shielding of the second hub 130, and cannot pass over the water retaining sheet 312, so the waterproof performance of the fan 1000 can be further improved, the water ingress at the bearing 410 can be reduced, and the reliability of the bearing 410 can be improved.

[0063] Alternatively, in another embodiment of the present invention, along the axial direction of the stator assembly 300, the width of the water groove 319 is greater than the height of the water dividing rib 340 protruding from the stator housing 310. Therefore, even if the water flows outward from the water dividing rib 340, the water groove 319 can receive the overflowing water flow and inhibit the water flow from flowing toward the bearing 410, thereby achieving better waterproof protection for the bearing 410.

[0064] Reference Figure 5 , Figure 8 and Figure 9As shown, in the embodiment of the present invention, a peripheral edge of the stator housing 310 is provided with a peripheral edge 315, and a water leakage hole 316 is provided at the lower end of the peripheral edge 315. Water passes through the water dividing rib 340 or the water trough 319 and can finally flow out from the water leakage hole 316, thereby avoiding water accumulation in the fan 1000. The structural design of the fan 1000 is reasonable and the reliability is high.

[0065] Reference Figure 4 and Figure 9 As shown, in an embodiment of the present invention, the stator housing 310 is provided with an annular groove 313, which is arranged circumferentially around the stator core 320, and part of the structure of the first hub 110 and the rotor assembly 200 is inserted into the annular groove 313 and separated from the inner wall of the annular groove 313 to reduce the friction force when the first hub 110 and the rotor assembly 200 rotate and improve the rotation efficiency.

[0066] Reference Figure 4 As shown, in the embodiment of the present invention, the stator housing 310 is formed with a cavity 318 on the inner side of the stator core 320, and the stator housing 310 is provided with a first through hole 317 connecting the cavity 318 and the inside of the first hub 110. The stator core 320 is provided with a stator winding 390, which is the main source of heat, so the heat generated by the stator winding 390 can be dissipated into the cavity 318, and then enter the inside of the first hub 110 through the first through hole 317, and finally discharged to the outside of the fan 1000 along the annular groove 313.

[0067] Continue to refer to Figure 4 As shown, in the embodiment of the present invention, the end surface of the stator housing 310 facing the bearing 410 is the inner end surface 360, the end surface away from the bearing 410 is the outer end surface 370, and the wall surface surrounding the cavity 318 is the arc surface 380. The heat generated by the stator winding 390 of the stator core 320 can be dissipated through the inner end surface 360, the outer end surface 370 and the arc surface 380, effectively avoiding the situation where the temperature of the fan 1000 is too high due to heat accumulation, so the fan 1000 has high heat dissipation efficiency and good reliability.

[0068] Continue to refer to Figure 4As shown, in the embodiment of the present invention, the stator assembly 300 further includes an end cover 350, which is fixedly connected to the end wall of the stator housing 310 away from the bearing 410, and the end cover 350 is provided with a second through hole 351 communicating with the cavity 318. That is, the second through hole 351, the cavity 318, the first through hole 317, the inner cavity of the first hub 110 and the annular groove 313 can form a heat dissipation channel, and the heat generated by the stator winding 390 of the stator core 320 is dissipated through the heat dissipation channel, that is, cold air (relative to the hot air generated by the stator winding 390) enters from the second through hole 351, passes through the cavity 318, the first through hole 317, the inner cavity of the first hub 110 and the annular groove 313 in sequence, and finally takes the heat out to the outside of the fan 1000. Alternatively, the cold air may pass through the annular groove 313, the inner cavity of the first hub 110, the first through hole 317 and the cavity 318 in sequence, and finally be discharged to the external space from the second through hole 351. The flow direction of the air may be determined according to the wind direction blown out by the wind wheel 100. In another embodiment, the hot air may also be discharged to the outside of the fan 1000 through the gap between the inner ring and the outer ring of the bearing 410, or the cold air may enter the first through hole 317 and the cavity 318 through the gap between the inner ring and the outer ring of the bearing 410, and finally the heat may be blown out to the outside of the fan 1000 from the second through hole 351. The appropriate solution may be selected according to the actual situation.

[0069] Reference Figure 4 and Figure 7 As shown, in the embodiment of the present invention, a baffle 132 is connected between the first hub 110 and the second hub 130, and at least one heat dissipation rib 131 is provided on the inner side of the baffle 132. The inner side of the baffle 132 refers to the side of the baffle 132 facing the stator winding 390. It can be understood that when the wind wheel 100 rotates, the heat dissipation rib 131 can be driven to rotate synchronously, so that the heat dissipation rib 131 stirs the air inside the first hub 110. Therefore, the static pressure on the side of the heat dissipation rib 131 facing the stator winding 390 is large, and the static pressure on the side away from the stator winding 390 is small, so that air enters from the second through hole 351, passes through the cavity 318, the first through hole 317, the inner cavity of the first hub 110 and the annular groove 313 in sequence, and finally takes the heat generated by the stator winding 390 out to the outside of the fan 1000. By providing the heat dissipation rib 131, the heat dissipation effect can be further improved, the temperature rise caused by heat accumulation can be reduced, and the service life of the fan 1000 can be increased.

[0070] Reference Figure 6 As shown, in another embodiment of the present invention, the baffle plate 132 is provided with at least one third through hole 134 , and the third through hole 134 communicates the inner side and the outer side of the baffle plate 132 . Figure 6The dotted arrows therein indicate the direction of the air flow. When the heat dissipation ribs 131 stir the air flow, air can enter from the second through-hole 351, successively pass through the cavity 318, the first through-hole 317, the inner cavity of the first hub 110, and the third through-hole 134, and finally take out the heat generated by the stator winding 390 to the outside of the fan 1000, reducing the temperature rise caused by heat accumulation.

[0071] Referring to Figure 7 As shown, in the embodiment of the present invention, the heat dissipation ribs 131 are arranged to extend radially along the first hub 110 and there are multiple ones, for example, three are provided. The multiple heat dissipation ribs 131 are arranged at intervals along the circumferential direction of the first hub 110, which can further improve the efficiency of air disturbance and enhance the heat dissipation effect.

[0072] Referring to Figure 3 and Figure 4 As shown, in the embodiment of the present invention, reinforcing ribs 133 are provided on the outer side of the baffle 132. The outer side of the baffle 132 is the side of the baffle 132 facing away from the stator core 320. The reinforcing ribs 133 extend radially along the fixed shaft 330, and the reinforcing ribs 133 play a role in increasing the connection stability between the first hub 110 and the second hub 130. Among them, one or more reinforcing ribs 133 can be provided. Taking multiple ones as an example, the multiple reinforcing ribs 133 are distributed at intervals along the circumferential direction of the second hub 130, and are arranged in a circumferential dislocation with the multiple heat dissipation ribs 131 along the second hub 130, which can further improve the connection stability between the first hub 110 and the second hub 130.

[0073] Referring to Figure 3 and Figure 4 As shown, in the embodiment of the present invention, the bearing assembly 400 further includes a bearing seat 450, and the bearing seat 450 is fixedly arranged inside the second hub 130. For example, the bearing seat 450 is a metal part and is fixedly connected to the second hub 130 by an integral plastic coating method. In order to improve the stability during plastic coating, the outer peripheral wall of the bearing seat 450 can be non-circular, such as elliptical or polygonal, etc. For example, referring to Figure 10 As shown, the outer peripheral wall of the bearing seat 450 is polygonal, which can effectively limit the rotation of the bearing seat 450 and improve the reliability during plastic coating. Of course, the bearing seat 450 and the stator housing 310 can also be connected by means of clamping, interference fit, etc. A positioning portion 451 is provided at one end of the bearing seat 450 away from the stator core 320. The bearing 410 is arranged inside the bearing seat 450 and abuts against the positioning portion 451 for positioning, thereby restricting the relative position between the bearing 410 and the bearing seat 450. Among them, the outer ring of the bearing 410 and the bearing seat 450 are in interference fit, and the inner ring of the bearing 410 and the fixed shaft 330 are in clearance fit. It can improve the convenience and stability of assembly, better transmit torque, and improve the reliability of connection.

[0074] Referring to Figure 2, Figure 3 and Figure 4 As shown in Figure 3 and Figure 4 , in an embodiment of the present invention, the fan 1000 further includes elastic members 430 and locking members 440 located at both ends of the bearing 410. The locking member 440 is fixedly connected to the fixed shaft 330. Both ends of the elastic member 430 respectively abut against the inner ring of the bearing 410 and the stator housing 310, or both ends of the elastic member 430 respectively abut against the inner ring of the bearing 410 and the water baffle 312, so that the bearing 410 and the locking member 440 abut against each other, thereby restricting the axial displacement of the bearing 410 on the fixed shaft 330. Among them, the locking member 440 includes a nut 441 and a gasket 442. The gasket 442 is located between the nut 441 and the inner ring of the bearing 410 and axially abuts against the fixed shaft 330. The gasket 442 can increase the assembly area, facilitating the threaded connection between the nut 441 and the fixed shaft 330, thereby restricting the bearing 410 from disengaging from the fixed shaft 330 in the direction away from the stator housing 310. The locking member 440 can also be a snap ring, a bolt, or other structures, and a suitable solution is specifically selected according to the actual situation. The elastic member 430 can be a spring, and the spring is sleeved on the fixed shaft 330. The elastic member 430 can also be a corrugated gasket, and a suitable solution is specifically selected according to the actual situation.

[0075] It should be noted that in an embodiment of the present invention, one or more bearings 410 can be provided. When one bearing 410 is provided, the locking member 440 and the elastic member 430 respectively abut against both ends of the bearing 410 along its axis, thereby restricting the displacement of the bearing 410. When multiple bearings 410 are provided, for example, referring to Figure 4 As shown in Figure 4 , two bearings 410 are provided, namely a first bearing 410a and a second bearing 410b. The first bearing 410a and the second bearing 410b are axially spaced apart in the bearing seat 450 along the fixed shaft 330. The inner wall of the bearing seat 450 is provided with a convex portion, which is located between the first bearing 410a and the second bearing 410b, and the first bearing 410a and the second bearing 410b respectively abut against the convex portion for positioning. In another embodiment, by providing a spacer sleeve between the first bearing 410a and the second bearing 410b, the spacer sleeve is installed in the bearing seat 450, and the first bearing 410a and the second bearing 410b are positioned by abutting against the spacer sleeve, and a suitable solution is specifically selected according to the actual situation. The locking member 440 abuts against the bearing 410 farthest from the stator housing 310, and one end of the elastic member 430 abuts against the bearing 410 closest to the stator housing 310. The solution of using multiple bearings 410 can improve the connection stability of the wind wheel 100, making the wind wheel 100 rotate more smoothly.

[0076] To improve the installation convenience of the fan 1000, referring to Figure 1As shown, in an embodiment of the present invention, a plurality of mounting lugs 314 are provided at the edge of the stator housing 310, and the plurality of mounting lugs 314 are arranged at intervals along the circumferential direction of the stator housing 310. The blower 1000 can be fixedly connected to the housing of the air conditioner through the mounting lugs 314, thereby determining the relative positions of the blower 1000 and the air conditioner.

[0077] An air conditioner according to an embodiment of the present invention includes the blower 1000 of the above embodiment. In the air conditioner according to the embodiment of the present invention, by adopting the blower 1000 of the above embodiment, the blower 1000 is fixedly connected to the first hub 110 of the impeller 100 through the rotor assembly 200 provided. Therefore, when the rotor assembly 200 rotates, it can drive the blades 120 to rotate together. The fixed shaft 330 of the stator assembly 300 is fixedly connected to the stator housing 310, and the stator core 320 is fixedly connected to the stator housing 310 and is located in the space surrounded by the rotor assembly 200. The bearing assembly 400 is fixedly connected to the first hub 110, and the bearing 410 is connected to the fixed shaft 330. Therefore, through the cooperation of the stator core 320 and the rotor assembly 200, the impeller 100 rotates relative to the fixed shaft 330. Since the blades 120 are connected to the rotor assembly 200 through the first hub 110, the cantilever beam of the impeller 100 can be shortened, the jumping amplitude of the impeller 100 can be reduced, and the reliability of the blower 1000 can be improved. The fixed shaft 330 is fixed to the stator housing 310. Therefore, the fixed shaft 330 mainly plays a supporting role, hardly bears torque, the strength requirement for the shaft is reduced, the cost is reduced, and the reliability is improved. The stator core 320 and the bearing 410 are arranged at intervals along the rotation axis direction of the impeller 100, that is, the bearing 410 is far away from the heat source and electromagnetic source of the stator core 320, which can effectively reduce the electromotive force generated by the bearing 410 cutting the magnetic induction line, and further improve the problem of relatively serious electrical corrosion of the bearing 410 and increase the service life of the bearing 410.

[0078] Since the air conditioner according to the embodiment of the present invention adopts all the technical solutions of the blower 1000 of the above embodiment, it has at least all the beneficial effects brought by the technical solutions of the above embodiment, which will not be elaborated here.

[0079] The above has described the embodiments of the present invention in detail with reference to the drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes can be made without departing from the purpose of the present invention.

Claims

1. A fan, characterized in that, Comprising: A wind wheel, including a first hub; A stator assembly, including a stator housing, a stator core, a stator winding, and a fixed shaft. The fixed shaft is fixedly connected to the stator housing. The stator winding is disposed on the stator core, and the stator winding and the stator core are fixedly connected to the stator housing; A rotor assembly, fixedly connected to the first hub and arranged around the stator core; A bearing assembly, fixedly connected within the first hub. The bearing assembly includes a bearing, and the bearing is connected to the fixed shaft so that the wind wheel can rotate relative to the fixed shaft; Wherein, the stator winding and the bearing are arranged at intervals along the axial direction of the stator assembly.

2. The fan according to claim 1, characterized in that: The bearing assembly further includes a second hub located within the first hub, and the bearing is provided within the second hub. The stator assembly further includes at least one water diversion rib, and the water diversion rib is arranged on the end wall of the stator housing facing the bearing. The water diversion rib is used to divert the water above the second hub to both sides of the second hub.

3. The fan according to claim 2, characterized in that: The middle part of the water diversion rib is located above the second hub, and both ends extend downward and to both sides of the bearing respectively.

4. The fan according to claim 3, characterized in that: Both ends of the water diversion rib are located below the second hub.

5. The fan according to any one of claims 2 to 4, characterized in that: The end wall of the stator housing facing the bearing bulges outward to form a boss. The fan further includes a water baffle, and the water baffle is sleeved on the fixed shaft and abuts against the boss. A water tank is formed between the water baffle, the boss, and the stator housing. Along the axial direction of the stator assembly, the width of the water tank is greater than the height of the water diversion rib.

6. The fan according to claim 1, characterized in that: The end wall of the stator housing facing the bearing bulges outward to form a boss. The fan further includes a water baffle, and the water baffle is sleeved on the fixed shaft and abuts against the boss.

7. The fan according to claim 6, characterized in that: The bearing assembly further includes a second hub located within the first hub, and the bearing is provided within the second hub. The water baffle is disposed within the second hub.

8. The fan according to claim 1, characterized in that: The stator housing is provided with an annular groove, which is arranged circumferentially around the stator core. Part of the structures of the first hub and the rotor assembly are inserted into the annular groove.

9. The fan according to claim 1, characterized in that: The stator housing forms a cavity inside the stator core, and the stator housing is provided with a first through hole communicating the cavity and the interior of the first hub.

10. The fan according to claim 9, characterized in that: The stator assembly further includes an end cover, which is fixedly connected to the end wall of the stator housing away from the bearing. The end cover is provided with a second through hole communicating with the cavity.

11. The fan according to claim 1, characterized in that: The bearing assembly further includes a bearing seat. A positioning portion is provided at one end of the bearing seat away from the stator core, and the bearing abuts against the positioning portion.

12. The fan according to claim 11, characterized in that: The bearing assembly further includes a second hub located within the first hub. A baffle is connected between the second hub and the first hub. At least one heat dissipation rib is provided on the inner side of the baffle, and the bearing seat is fixedly connected within the second hub.

13. The fan according to claim 12, characterized in that: The baffle is provided with at least one third through hole, which communicates the inner side and the outer side of the baffle.

14. An air conditioner, characterized in that: Including the fan according to any one of claims 1 to 13.

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