Fan and air conditioner

Abstract

The utility model 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 utility model relates to the technical field of fans, in particular to a fan and an air conditioner. Background Art

[0002] In the related technology, the fan wheel of the air conditioner is connected to the motor drive. When the motor is running, due to the unbalanced magnetic resistance of the stator core, an alternating potential is easily generated; when the magnetic poles of the motor rotate, the magnetic flux intersecting with the bearing changes alternately, and a shaft voltage is generated. Under normal circumstances, the lubricating oil film of the bearing can play a certain insulating role, and the bearing will not generate shaft current. However, when the shaft voltage is high, or the motor has just started, or after the motor has been running for a long time, the shaft voltage can easily break through the lubricating oil film to form a circuit to generate shaft current, causing electrical corrosion problems in the bearing. The bearing is prone to vibration and noise, and more seriously, it will cause bearing failure and reduce the service life of the bearing. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a fan, which can improve the problem of electrical corrosion of the bearing by arranging the stator core and the bearing in an axially spaced manner so that the bearing is far away from the electromagnetic source.

[0004] The utility model also provides an air conditioner with the fan.

[0005] The fan according to the first embodiment of the utility model includes:

[0006] A wind wheel, comprising a first hub;

[0007] A stator assembly, comprising a stator housing, a stator core, a stator winding and a fixed shaft, wherein the fixed shaft is fixedly connected to the stator housing, the stator winding is arranged 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 in the first hub, the bearing assembly comprising a bearing, the bearing being connected to the fixed shaft so that the wind wheel can rotate relative to the fixed shaft;

[0010] Wherein, the stator winding and the bearing are arranged at intervals along the axial direction of the stator assembly.

[0011] The fan according to the embodiment of the utility model 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 in the space surrounded by the rotor assembly, and 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 fan blades are connected to the rotor assembly through the first hub, the beating 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, so the fixed shaft mainly plays a supporting role and basically does not bear torque, the strength requirement of 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 flux lines, thereby improving the more serious problem of electrical corrosion of the bearing and improving the service life of the bearing.

[0013] According to some embodiments of the utility model, the bearing assembly also includes a second hub located inside the first hub, the bearing is arranged inside the second hub, and the stator assembly also includes at least one water dividing rib, the water dividing rib is arranged on the end wall of the stator housing facing one end of the bearing, and the water dividing rib is used to guide the water flow above the second hub to both sides of the second hub.

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

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

[0016] According to some embodiments of the utility model, the end wall of the stator housing protrudes outward toward one end of the bearing to form a boss, and the fan also includes a water retaining plate, which is sleeved on the fixed shaft and abuts against the boss, and a water groove is formed between the water retaining plate, the boss and the stator housing, and along the axial direction of the stator assembly, the width of the water groove is greater than the height of the water dividing rib.

[0017] According to some embodiments of the utility model, the end wall of the stator housing protrudes outward toward one end of the bearing to form a boss, and the fan further includes a water retaining plate, which is sleeved on the fixed shaft and abuts against the boss.

[0018] According to some embodiments of the present utility model, the bearing assembly further includes a second hub located inside the first hub, the bearing is disposed inside the second hub, and the water retaining sheet is built into the second hub.

[0019] According to some embodiments of the utility model, the fan also includes an elastic member and a locking member respectively located at both ends of the bearing, the locking member is connected to the fixed shaft, and the 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, which is arranged around the circumference of the stator core, and the first hub and a partial structure of the rotor assembly are inserted into the annular groove.

[0021] According to some embodiments of the present invention, the stator housing forms a cavity on the inner side of the stator core, and the stator housing is provided with a first through hole connecting the cavity and the interior of the first hub.

[0022] According to some embodiments of the present invention, the stator assembly further comprises an end cover, the end cover is fixedly connected to an end wall of the stator housing at one end 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 comprises a bearing seat, and 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 utility model, the bearing assembly also 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 connects the inner side of the baffle with the outer side of the baffle.

[0026] According to some embodiments of the utility model, the heat dissipation ribs extend radially along the first hub and are provided in plurality, and the plurality of heat dissipation ribs are arranged at intervals along the circumference of the first hub.

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

[0028] The air conditioner according to the second embodiment of the utility model includes the fan described in the above embodiment.

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

[0030] The fan of the first embodiment is provided with a rotor assembly fixedly connected to the first hub of the wind wheel, so that the rotor assembly 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 in the space surrounded by the rotor assembly, and 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 beating 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, so the fixed shaft mainly plays a supporting role and basically does not bear torque, the strength requirement of 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 direction of the rotation axis of the wind wheel, 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 flux lines, thereby improving the more serious problem of electrical corrosion of the bearing and improving the service life of the bearing.

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

[0032] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0033] Figure 1 This is a structural schematic diagram of a fan according to an embodiment of the utility model;

[0034] Figure 2 This is an exploded schematic diagram of a fan according to an embodiment of the utility model;

[0035] Figure 3 This is an exploded schematic diagram of a wind wheel and a rotor assembly according to an embodiment of the utility model;

[0036] Figure 4 This is a cross-sectional view of a fan after the fan blades are hidden in one embodiment of the utility model;

[0037] Figure 5 for Figure 4 The enlarged view of point A in the middle;

[0038] Figure 6 A cross-sectional view of a fan with its blades hidden in another embodiment of the utility model

[0039] Figure 7 This is a schematic diagram of the structure of a wind wheel according to an embodiment of the utility model;

[0040] Figure 8 This is a structural schematic diagram of a stator assembly of an embodiment of the utility model;

[0041] Fig. 9 It is a partial structural schematic diagram of a stator assembly of an embodiment of the utility model;

[0042] Fig.10 The figure is a schematic structural diagram of a bearing seat according to an embodiment of the utility model.

[0043] Figure Number:

[0044] Fan 1000;

[0045] Wind wheel 100; first hub 110; wind blade 120; second hub 130; heat dissipation rib 131; baffle 132; reinforcing rib 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 retaining plate 312; annular groove 313; mounting ear 314; surrounding 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 dividing rib 340; guide rib 341; end cover 350; second through hole 351; inner end surface 360; outer end surface 370; arc surface 380; stator winding 390;

[0048] Bearing assembly 400 ; bearing 410 ; elastic member 430 ; locking member 440 ; nut 441 ; washer 442 ; bearing seat 450 ; positioning portion 451 . DETAILED DESCRIPTION

[0049] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0050] In the description of the present invention, it should be understood that the descriptions involving orientation, such as the orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are 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 cannot be understood as a limitation on the present invention.

[0051] In the description of the present utility model, "a plurality" means more than two. If there is a description of "first" or "second", it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0052] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0053] Reference Figure 1 , Figure 2 and Figure 3 As shown, in an embodiment of the utility model, the wind turbine 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 a fan blade 120 connected to the outer peripheral wall of the first hub 110. The fan blade 120 is provided in plurality and is arranged at intervals along the circumference of the first hub 110. The plurality of fan blades 120 can improve the operating stability and working efficiency of the wind turbine 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 a plurality of permanent magnetic materials, and the plurality of permanent magnetic materials are arranged in the form of magnetic poles and fixedly connected to the first hub 110. Referring to Figure 8 and 9 As shown, the stator assembly 300 includes a stator housing 310, a stator core 320, a fixed shaft 330 and a stator winding 390. The fixed shaft 330 is fixedly connected to the stator housing 310, and the stator winding 390 is arranged on the stator core 320. For example, an insulating frame 321 is sleeved on the stator core 320, and the stator winding 390 is wound on the insulating frame 321. The rotor assembly 200 is arranged around the stator core 320. The stator core 320 and the stator housing 310 are fixedly connected and are located in the enclosed space of the rotor assembly 200. The bearing assembly 400 is fixedly connected to the first hub 110. The bearing assembly 400 includes a bearing 410. The fixed shaft 330 is passed through the inner ring of the bearing 410. The inner ring of the bearing 410 and the fixed shaft 330 are clearance-fitted. Refer to Figure 4 As shown, the stator core 320 and the bearing 410 are arranged at intervals along the direction of the rotation axis of the wind wheel 100 .

[0054] It can be understood that by setting the rotor assembly 200 to be fixedly connected to the first hub 110 of the wind wheel 100, the rotor assembly 200 can drive the blades 120 to rotate together when rotating. 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 between the stator core 320 and the rotor assembly 200, the wind wheel 100 rotates relative to the fixed shaft 330. Since the blades 120 are connected to the rotor assembly 200 through the first hub 110, compared with the solution in the prior art in which the wind wheel is connected to the rotating shaft of the motor, this embodiment can shorten the cantilever beam of the wind wheel 100 (i.e., reduce the torque of the wind wheel 100), reduce the beating amplitude of the wind wheel 100, and improve the reliability of the wind turbine 1000. The fixed shaft 330 is fixed to the stator housing 310, so the fixed shaft 330 mainly plays a supporting role and basically does not bear torque, the strength requirement of 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 away from the heat source and the electromagnetic source, which can effectively reduce the electromotive force generated by the bearing 410 due to cutting the magnetic flux lines, avoid or reduce the current generated by the bearing 410, improve the current release of electrical energy at the local position of the bearing 410 to generate high temperature, melt the small areas of the inner ring raceway and the outer ring raceway of the bearing 410 and form a plurality of strip grooves, thereby improving the problem of more serious electrical corrosion of the bearing 410 and increasing the service life of the bearing 410.

[0055] In order to improve the problem that the fan 1000 is easily infiltrated with water, insects, dust and other foreign objects, refer to Figure 4 As shown, in the embodiment of the utility model, the stator housing 310 is provided with an annular groove 313, and the annular groove 313 is arranged around the circumference of the stator core 320. 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 avoid the first hub 110 and the rotor assembly 200 from contacting the inner wall of the annular groove 313 when rotating. Therefore, a first channel 140, a second channel 150 and a third channel 160 which are connected in sequence 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 maze-like structure, and the gap between the first channel 140 and the second channel 150 is between 0.5mm-1.5mm, and the gap between the third channel 160 is between 0.2mm-1mm, which can effectively reduce the entry of water or foreign objects 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] Reference Figure 4 and Figure 7 As shown, in the embodiment of the present invention, the bearing assembly 400 further includes a second hub 130 located inside the first hub 110. The second hub 130 and the first hub 110 are fixedly connected and coaxially arranged, and a bearing 410 is installed inside the second hub 130. Figure 8 As shown, the stator assembly 300 further includes at least one water dividing rib 340, which is disposed on the end wall of the stator housing 310 facing the bearing 410, and the water dividing rib 340 is used to guide the water flow above the second hub 130 to the two sides of the second hub 130. It is understandable that during the operation of the fan 1000, water may enter due to condensation water, rainwater, etc., and the water enters the interior of the first hub 110 from the first channel 140, the second channel 150 and the third channel 160, and flows to the following directions: Figure 4 As shown, Figure 4 The dotted arrow in the figure indicates the direction of water flow. Since the bearing 410 is a metal part, it is easy to cause adverse effects such as rust and lubrication failure when water enters the bearing 410. Therefore, by setting the water dividing rib 340, the water can be diverted to the two 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 prevent water from entering and affecting the realization of the functions of key parts.

[0057] Reference Figure 8 As shown, in the embodiment of the present invention, the water dividing rib 340 is strip-shaped and protrudes from the end surface of the stator housing 310, the middle part of the water dividing rib 340 is located above the second hub 130, and the two ends of the water dividing rib 340 are respectively located on both sides of the bearing 410 and extend downward, and can extend to the bottom of the second hub 130, so as to further reduce the water ingress into the bearing 410. Therefore, when water flows downward from the top of the stator housing 310, the water is directed downward to both sides thereof through the middle part of the water dividing rib 340, thereby effectively reducing the water ingress into the second hub 130, and can reduce the risk of rusting, lubrication failure, etc. of the bearing 410.

[0058] Continue to refer to Figure 8As shown, in the embodiment of the utility model, a plurality of water-dividing ribs 340 can be provided, and the plurality of water-dividing ribs 340 are arranged at intervals along the direction from top to bottom. For example, three water-dividing ribs 340 are provided, namely the first water-dividing rib 340a, the second water-dividing rib 340b and the third water-dividing rib 340c, and 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 along the direction from top to bottom. 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 diversion and flow guidance, and there may be differences in adaptability in their structures, but they all belong to the specific implementation forms of the water-dividing rib 340. When the amount of water entering is large and causes the water to pass over 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 passes over 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, thereby further improving the waterproof performance of the fan 1000.

[0059] Continue to refer to Figure 8 As shown, in the embodiment of the utility model, two guide ribs 341 are provided between two adjacent water-dividing ribs 340, and the ends of the two guide ribs 341 that are close to each other are connected to the water-dividing rib 340 located at the upper side of the two adjacent water-dividing ribs 340, and the ends of the two guide ribs 341 that are separated from each other extend downward and to both sides. The ends of the two guide ribs 341 that are close to each other can be arranged to be connected and connected to the middle position of the water-dividing rib 340. As an alternative embodiment, the structure of the two guide ribs 341 can also be replaced by a rib with an arc-shaped transition. When the amount of water inflow is large, the water passes over the water-dividing rib 340 located at the top, and the guide rib 341 plays a role of secondary diversion, and diverts the water to both sides of the bearing 410, inhibiting the water flow from entering the bearing 410. In addition, the guide rib 341 also has the function of strengthening the strength of the water-dividing rib 340, making the mold easy to implement and improving manufacturability.

[0060] Continue to refer to Figure 8As shown, in the embodiment of the utility model, 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 utility model, the end wall of the stator housing 310 toward 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 utility model, the water retaining sheet 312 is built into the second hub 130, and a water trough 319 is formed between the water retaining sheet 312, the boss 311 and the end wall of the stator housing 310. The water trough 319 is arranged around the boss 311, and one end of the second hub 130 facing the stator core 320 extends to the top of the water trough 319. It can be understood that when water flows from top to bottom, the water can only flow to the water trough 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 inflow 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 Fig. 9As shown, in the embodiment of the utility model, 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 Fig. 9 As shown, in the embodiment of the utility model, the stator housing 310 is provided with an annular groove 313, and the annular groove 313 is arranged around the circumference of the stator core 320. 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 utility model, 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 utility model, 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 utility model, 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 utility model, 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 arrow in the figure indicates the direction of airflow. When the heat dissipation ribs 131 stir the air flow, the air can enter from the second through hole 351, pass through the cavity 318, the first through hole 317, the inner cavity of the first hub 110 and the third through hole 134 in sequence, and finally bring the heat generated by the stator winding 390 out to the outside of the fan 1000, reducing the temperature rise caused by heat accumulation.

[0071] Reference 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 are provided in multiple pieces, for example, three pieces. The multiple heat dissipation ribs 131 are arranged at intervals along the circumference of the first hub 110, which can further improve the efficiency of air disturbance and improve the heat dissipation effect.

[0072] Reference Figure 3 and Figure 4 As shown, in the embodiment of the utility model, a reinforcing rib 133 is provided on the outer side of the baffle 132. The outer side of the baffle 132, that is, the side of the baffle 132 away from the stator core 320, extends along the radial direction of the fixed shaft 330, and the reinforcing rib 133 serves to increase the connection stability between the first hub 110 and the second hub 130. Among them, one or more reinforcing ribs 133 can be provided. For example, multiple reinforcing ribs 133 are distributed at intervals along the circumference of the second hub 130, and are staggered with multiple heat dissipation ribs 131 along the circumference of the second hub 130, which can further improve the connection stability between the first hub 110 and the second hub 130.

[0073] Reference Figure 3 and Figure 4 As shown, in the embodiment of the present invention, the bearing assembly 400 further includes a bearing seat 450, which is fixedly disposed inside the second hub 130. For example, the bearing seat 450 is a metal part, which is fixedly connected to the second hub 130 by integrally coating. In order to improve the stability during coating, the outer peripheral wall of the bearing seat 450 can be non-circular, such as an ellipse or a polygon. For example, referring to Fig.10 As shown, the outer peripheral wall of the bearing seat 450 is a polygon, 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 snap-fit, interference fit, etc. A positioning portion 451 is provided at one end of the bearing seat 450 away from the stator core 320, and the bearing 410 is arranged in the bearing seat 450 and abuts against the positioning portion 451 to position, thereby limiting 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 interference fit, and the inner ring of the bearing 410 and the fixed shaft 330 are clearance fit. It can improve the convenience and stability of assembly, better transmit torque, and improve the reliability of connection.

[0074] Reference Figure 2 , Figure 3 and Figure 4 As shown, in the embodiment of the utility model, the fan 1000 further includes an elastic member 430 and a locking member 440 located at both ends of the bearing 410, the locking member 440 is fixedly connected to the fixed shaft 330, and the two ends of the elastic member 430 are respectively abutted against the inner ring of the bearing 410 and the stator housing 310, or the two ends of the elastic member 430 are respectively abutted against the inner ring of the bearing 410 and the water retaining sheet 312, so that the bearing 410 and the locking member 440 abut, thereby limiting the axial displacement of the bearing 410 on the fixed shaft 330. Among them, the locking member 440 includes a nut 441 and a washer 442, the washer 442 is located between the nut 441 and the inner ring of the bearing 410 and abuts against the axis of the fixed shaft 330, and the washer 442 can increase the assembly area, facilitate the threaded connection between the nut 441 and the fixed shaft 330, thereby limiting the bearing 410 from being separated from the fixed shaft 330 in the direction away from the stator housing 310. The locking member 440 may also be a retaining spring, a latch, or other structures, and a suitable solution may be selected according to the actual situation. The elastic member 430 may be a spring, and the spring is sleeved on the fixed shaft 330. The elastic member 430 may also be a corrugated gasket, and a suitable solution may be selected according to the actual situation.

[0075] It should be noted that in the embodiment of the present invention, there can be one or more bearings 410. When there is only one bearing 410, the locking member 440 and the elastic member 430 are respectively in contact with both ends of the bearing 410 along its axial direction, thereby limiting the displacement of the bearing 410. When there are multiple bearings 410, for example, refer to Figure 4 As shown, there are two bearings 410, namely, a first bearing 410a and a second bearing 410b, which are arranged in the bearing seat 450 at intervals along the axial direction of 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 are respectively abutted and positioned with the convex portion. In another embodiment, by arranging a spacer between the first bearing 410a and the second bearing 410b, the spacer is installed in the bearing seat 450, and the first bearing 410a and the second bearing 410b are positioned by abutting with the spacer, and a suitable solution is selected according to the actual situation. The locking member 440 abuts against a 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, so that the wind wheel 100 rotates more smoothly.

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

[0077] An air conditioner according to an embodiment of the utility model comprises the fan 1000 of the above embodiment. The air conditioner according to the embodiment of the utility model adopts the fan 1000 of the above embodiment, and the fan 1000 is fixedly connected to the first hub 110 of the wind wheel 100 by setting a rotor assembly 200, so that when the rotor assembly 200 rotates, it can drive the fan 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 between the stator core 320 and the rotor assembly 200, the wind wheel 100 rotates relative to the fixed shaft 330. Since the fan blade 120 is connected to the rotor assembly 200 through the first hub 110, the cantilever beam of the wind wheel 100 can be shortened, the vibration amplitude of the wind wheel 100 can be reduced, and the reliability of the wind turbine 1000 can be improved. The fixed shaft 330 is fixed to the stator housing 310, so the fixed shaft 330 mainly plays a supporting role and basically does not bear torque, the strength requirement of 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 wind wheel 100, that is, the bearing 410 is 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 flux lines, thereby improving the problem of more serious electrical corrosion of the bearing 410 and increasing the service life of the bearing 410.

[0078] Since the air conditioner of the embodiment of the utility model adopts all the technical solutions of the fan 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 repeated here.

[0079] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A fan, characterized in that: include: A wind wheel, comprising a first hub; A stator assembly, comprising a stator housing, a stator core, a stator winding and a fixed shaft, wherein the fixed shaft is fixedly connected to the stator housing, the stator winding is arranged 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 disposed around the stator core; A bearing assembly, fixedly connected in the first hub, the bearing assembly comprising a bearing, the bearing being 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 also includes a second hub located inside the first hub, the bearing being arranged inside the second hub, and the stator assembly also includes at least one water dividing rib, the water dividing rib being arranged on the end wall of the stator housing facing one end of the bearing, the water dividing rib being used to guide the water flow above the second hub to the two sides of the second hub.

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

4. The fan according to claim 3, characterized in that: Both ends of the water dividing 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 protrudes outward toward one end of the bearing to form a boss. The fan also includes a water retaining plate, which is sleeved on the fixed shaft and abuts against the boss. A water groove is formed between the water retaining plate, the boss and the stator housing. Along the axial direction of the stator assembly, the width of the water groove is greater than the height of the water dividing rib.

6. The fan according to claim 1, characterized in that: The end wall of the stator housing toward one end of the bearing protrudes outward to form a boss, and the fan further includes a water retaining plate, which is sleeved on the fixed shaft and abuts against the boss.

7. The fan according to claim 6, characterized in that: The bearing assembly also includes a second hub located inside the first hub, the bearing is arranged inside the second hub, and the water retaining sheet is built inside 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 around the circumference of the stator core, and the first hub and a partial structure of 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 with the cavity and the interior of the first hub.

10. The fan according to claim 9, characterized in that: The stator assembly further comprises an end cover, which is fixedly connected to an end wall of the stator housing at one end away from the bearing, and 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 comprises a bearing seat, and 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 also 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.

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

14. An air conditioner, characterized in that: A fan comprising the fan as claimed in any one of claims 1 to 13.

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