Fan assembly and duct type air conditioner

Abstract

The utility model discloses a fan assembly and a duct type air conditioner, and belongs to the technical field of air conditioners. The fan assembly comprises a motor, a fan, a fixing piece and a fastening piece. The fan comprises a shaft ring extending in the axial direction of the fan, and the shaft ring is provided with a penetrating part used for allowing a driving shaft connected with the motor to penetrate through; the avoiding part is arranged on the side wall of the shaft ring, and the avoiding part communicates with the penetrating part; the fixing piece is connected to the shaft ring and comprises an end plate, a connecting piece and a connecting piece, and the driving shaft is sleeved with the end plate. The platform part is connected with the end plate and is positioned on the outer side of the shaft ring; the inserting part is connected to the side, away from the end plate, of the platform part, and the inserting part is inserted into the fan so as to limit rotation of the inserting part relative to the fan; and the fastening piece is in threaded connection with the platform part and penetrates through the avoiding part, and the end of the fastening piece abuts against the driving shaft so as to abut against the driving shaft. The duct type air conditioner comprises the fan assembly. According to the fan assembly and the duct type air conditioner, the connection between the shaft and the fan is simplified, and the cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioners, in particular to a fan assembly and a ducted air conditioner. BACKGROUND

[0002] The ducted air conditioner belongs to the air conditioner. In the ducted air conditioner, the center of the fan is connected with a shaft sleeve, the outer wall of the shaft sleeve is sleeved with a damping rubber ring, and the shaft sleeve is used for connecting with the motor output shaft or the transmission shaft. This kind of structure form has the problems of complex shaft sleeve structure, more material, high cost. CONTENT OF THE UTILITY MODEL

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application provides a fan assembly and a ducted air conditioner, which simplifies the connection of the shaft and the fan and reduces the cost.

[0004] In one aspect of the present application, a fan assembly comprises: a motor, a fan, a fixing member and a fastener;

[0005] The fan comprises: a shaft ring extending in the axial direction of the fan, the shaft ring being provided with: a through portion for the driving shaft connected with the motor to pass through; and a avoiding portion provided on the side wall of the shaft ring, the avoiding portion being in communication with the through portion;

[0006] The fixing member is connected to the shaft ring, and the fixing member comprises: an end plate sleeved on the driving shaft; a platform portion connected to the end plate and located on the outer side of the shaft ring; and a plug-in portion connected to the side of the platform portion away from the end plate, the plug-in portion being plugged into the fan to limit the rotation of the plug-in portion relative to the fan;

[0007] The fastener is screwed to the platform portion and passes through the avoiding portion, and the end portion of the fastener abuts against the driving shaft to tightly press the driving shaft.

[0008] In the present application, a fixing member connected with the fan is provided, and then the driving shaft is tightly pressed by the fastener screwed with the fixing member. The driving shaft can drive the fan to rotate. Compared with the complex structure and high cost caused by connecting the fan with the driving shaft through the shaft sleeve in the prior art, the connection structure of the present application is simpler and has lower cost.

[0009] In some embodiments, the fan comprises a plurality of blades arranged in the circumferential direction; a middle disc connected in the space surrounded by the plurality of blades; and a plug-in groove is further provided on the shaft ring, the plug-in groove is recessed from the outer side of the shaft ring towards the through portion.

[0010] In the present application, the plug-in groove is arranged on the side wall of the shaft ring, and the plug-in portion cooperates with the plug-in groove to form axial limiting and rotation limiting between the fixing member and the shaft ring, so that the fixing member can be completely limited on the shaft ring.

[0011] In some embodiments, the shaft ring comprises: an outer ring part having mutually connected circular arc segments and flat plate segments, the flat plate segments abutting against the platform part; an inner ring part arranged in the outer ring part, the inner ring part being provided with a through part.

[0012] In some embodiments, the shaft ring is provided with a limiting rib wall connected between the inner ring part and the outer ring part; the fixing member further comprises: a limiting part connected to the end plate and arranged in spaced relation to the platform part, the limiting part being provided with a limiting slot, the limiting slot being in plug-in cooperation with the limiting rib wall.

[0013] In the present application, by arranging the limiting part on the fixing member and the limiting rib wall on the shaft ring in plug-in cooperation, stable connection between the fixing member and the shaft ring can be ensured.

[0014] In some embodiments, with respect to a plane Lp passing through the limiting hole and parallel to the platform part, the limiting part and the platform part are respectively located on two sides of the plane Lp.

[0015] In the present application, the cooperation positions of the plug-in part and the plug-in slot and the cooperation positions of the limiting part and the limiting rib wall are respectively located on two sides of the plane Lp, so that the cooperation structure between the fixing member and the shaft ring is relatively uniform and the connection is relatively stable.

[0016] In some embodiments, the outer side surface of the shaft ring comprises a first plane, and the platform part abuts against the first plane.

[0017] In the present application, by arranging the platform part of the fixing member to abut against the first plane of the shaft ring, a relatively large contact area between the two can be ensured, the reliability of the limiting can be improved, and the platform part in the form of a flat plate is relatively easy to process.

[0018] In some embodiments, on the shaft ring, the maximum distance from the first plane to the edge of the through part is Le3; the maximum distance from the platform part to the edge of the limiting hole is Lf3, and Le3≤Lf3≤Le3+1mm.

[0019] In the present application, Le3≤Lf3 can ensure that the platform part can be installed to the outside of the first plane and the driving shaft can be arranged in the limiting hole of the fixing member.

[0020] When the fastener abuts against the driving shaft, the driving shaft reacts on the fastener to give the fastener an upward force, the fastener drives the fixing member to produce a slight movement away from the driving shaft, and since Lf3≤Le3+1mm, the circular side surface surrounding the limiting hole on the fixing member can abut against the driving shaft to limit the movement of the fixing member, thereby ensuring that the fastener can abut tightly against the driving shaft.

[0021] In some embodiments, in the assembled state, the side surface of the side surface surrounding the plug-in slot on the shaft ring away from the avoiding part abuts against the plug-in part.

[0022] In the present application, the friction between the plug-in part and the slot surface can prevent the fastening screw from moving the fixing part away from the driving shaft.

[0023] In some embodiments, in the assembled state, the part of the side surface of the limiting hole away from the platform part abuts against the driving shaft.

[0024] In the present application, the abutment between the fixing part and the driving shaft can prevent the fastening screw from moving the fixing part away from the driving shaft, ensuring that the fastening screw can tighten the driving shaft.

[0025] In some embodiments, the vane is provided with an avoiding hole, which is coaxial with the avoiding part.

[0026] In the present application, the avoiding hole in the vane allows the operator to insert a tool into the fan through the avoiding hole to tighten the fastening part.

[0027] In some embodiments, the fan assembly is a centrifugal fan.

[0028] In another aspect of the present application, a ducted fan includes a housing provided with an air inlet and an air outlet; a heat exchanger arranged in the housing to exchange heat with air passing therethrough; and a fan assembly as described above to drive air to flow from the air inlet to the heat exchanger and then to be blown out of the air outlet. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 A schematic view of a ducted fan according to some embodiments is shown;

[0030] Figure 2 A sectional view of a ducted fan according to some embodiments is shown;

[0031] Figure 3 A schematic view of a ducted fan according to some other embodiments is shown;

[0032] Figure 4 A sectional view of a fan assembly according to some other embodiments is shown;

[0033] Figure 5 A schematic view of some embodiments is shown; Figure 4 enlarged view of A in FIG. 7;

[0034] Figure 6 A schematic view of some other embodiments is shown; Figure 4 enlarged view of A in FIG. 8;

[0035] Figure 7 A schematic view of a fan in a fan assembly according to some embodiments is shown;

[0036] Figure 8A partial schematic diagram of a fan in a fan assembly according to some embodiments is shown;

[0037] Figure 9 A partial cross-sectional view of a fan in a fan assembly according to some embodiments is shown;

[0038] Figure 10 It shows Figure 9 Sectional view along the BB direction;

[0039] Figure 11 A schematic diagram of a fixture in a wind turbine assembly according to some embodiments is shown;

[0040] Figure 12 A cross-sectional view of a fixture in a wind turbine assembly according to some embodiments is shown;

[0041] Figure 13 A side view of a fixture in a wind turbine assembly according to some embodiments is shown.

[0042] In the above figures, 10 is the housing; 10a is the air outlet; 10b is the air inlet; 11 is the bottom plate; 12 is the top plate; 13 is the middle partition; 141 is the air inlet cavity; 142 is the air outlet cavity; 20 is the fan assembly; 21 is the volute; 21a is the air intake; 21b is the air outlet; 211 is the air outlet section; 22 is the fan; 221 is the middle plate; 222 is the blade; 2221 is the clearance hole; 224 is the limiting rib; 2241 is the first limiting rib; 2242 is the second limiting rib; 225 is the second reinforcing rib; 23 is the motor; 230 is the drive shaft; 231 is the output shaft; 232 is the transmission shaft; 25 is the fastening screw; 26 is the coupling; 30 is the collar; 30a is the through section. 30b. Clearance section; 34. Outer ring section; 341. Arc segment; 342. Flat plate segment; 3421. First plane; 35. Inner ring section; 381. First reinforcing rib; 382. Limiting rib wall; 39. Insertion groove; 391. First insertion groove surface; 392. Second insertion groove surface; 393. Third insertion groove surface; 40. Fixing component; 41. Platform section; 410. Mounting hole; 414. First inclined surface; 415. Second inclined surface; 44. End plate; 441. Limiting hole; 45. Insertion section; 451. First limiting surface; 452. Second limiting surface; 46. Limiting section; 461. Limiting groove; 462. First groove side surface; 463. Second groove side surface; 50. Heat exchanger. Detailed Implementation

[0043] To make the objectives and implementation methods of this application clearer, the exemplary implementation methods of this application will be clearly and completely described below with reference to the accompanying drawings of the exemplary embodiments of this application. Obviously, the exemplary embodiments described are only some embodiments of this application, and not all embodiments.

[0044] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0045] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "multiple" means two or more.

[0046] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0047] Air conditioners execute a refrigeration cycle using a compressor, condenser, expansion valve, and evaporator. The refrigeration cycle involves a series of processes including compression, condensation, expansion, and evaporation, supplying refrigerant to the conditioned and heat-exchanged air.

[0048] The compressor compresses refrigerant gas at a low temperature and low pressure and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.

[0049] The expansion valve expands the high-temperature, high-pressure liquid refrigerant condensed in the condenser into a low-pressure liquid refrigerant. The evaporator evaporates the expanded refrigerant in the expansion valve, returning the low-temperature, low-pressure refrigerant gas to the compressor. The evaporator achieves its cooling effect by utilizing the latent heat of refrigerant evaporation to exchange heat with the material being cooled. Throughout the cycle, the air conditioner regulates the temperature of the indoor space.

[0050] The outdoor unit of an air conditioner refers to the part of the refrigeration cycle that includes the compressor and the outdoor heat exchanger. The indoor unit of an air conditioner includes the indoor heat exchanger, and an expansion valve can be provided in either the indoor or outdoor unit.

[0051] The indoor and outdoor heat exchangers function as either condensers or evaporators. When the indoor heat exchanger is used as a condenser, the air conditioner functions as a heater in heating mode; when the indoor heat exchanger is used as an evaporator, the air conditioner functions as a cooler in cooling mode.

[0052] The ducted air conditioner described in this application is a type of air conditioner.

[0053] Reference Figures 1 to 3 The duct unit according to the embodiments of this application includes a housing 10.

[0054] The housing 10 is generally rectangular in shape, forming the appearance of the duct unit. The housing 10 includes a bottom plate 11 forming the bottom structure, a top plate 12 forming the top structure, and side plates connecting the bottom plate 11 and the top plate 12.

[0055] An air outlet 10a is provided on one side plate of the housing 10. An air inlet 10b is provided on the side of the housing 10 opposite to the air outlet 10a, or an air inlet 10b is provided on the side of the bottom plate 11 of the housing 10 away from the air outlet 10a.

[0056] Indoor air enters the housing 10 through the air inlet 10b and returns to the indoor space through the air outlet 10a.

[0057] The housing 10 is provided with a partition 13. The partition 13 divides the space inside the housing 10 into two chambers, one chamber is the air inlet chamber 141 and the other chamber is the air outlet chamber 142. The air inlet 10b is connected to the air inlet chamber 141 and the air outlet 10a is connected to the air outlet chamber 142.

[0058] The ducted air handling unit includes a fan assembly 20. The fan assembly 20 can be installed inside the air inlet chamber 141.

[0059] The fan assembly 20 can be a centrifugal fan, which includes a volute 21. Intake ports 21a are provided on two sides perpendicular to the axis of the volute 21. An outlet portion 211 is provided on the volute 21, and an outlet 21b is formed at the end of the outlet portion 211. The outlet portion 211 is the part extending outward from the cylindrical portion of the volute 21.

[0060] The air outlet 211 of the volute 21 is provided with the middle partition 13, or the air outlet 21b of the volute 21 is opposite to the opening on the middle partition 13, so that the air outlet 21b of the volute 21 is connected to the air outlet cavity 142.

[0061] The fan assembly 20 includes a fan 22. The fan 22 is disposed within the volute 21. Specifically, the fan 22 may be disposed within the cylindrical portion of the volute 21.

[0062] The fan assembly 20 may include a motor 23. The motor 23 provides rotational driving force when connected to an external power source. The motor 23 is connected to a drive shaft 230, which is connected to a fan 22 to drive the fan 22 to rotate.

[0063] When the motor 23 is powered on, the fan 22 rotates, causing indoor air to enter the air intake chamber 141 through the air inlet 10b, then flow into the volute 21 through the air intake 21a, and continue to be blown into the air outlet chamber 142 through the air outlet 21b of the volute 21, and finally delivered into the room through the air outlet 10a.

[0064] The ducted air conditioner includes a heat exchanger 50. The heat exchanger 50 is disposed within the air outlet chamber 142 and located in the air flow path, for exchanging heat with the air passing through it.

[0065] The airflow generated by fan 22 is guided by volute 21 and flows through the air outlet 21b of volute 21 to heat exchanger 50. The air exchanges heat with the refrigerant flowing inside heat exchanger 50, thereby achieving cooling or heating of the airflow.

[0066] In some embodiments, see specific references Figure 1 The fan assembly 20 includes two fans 22. The two fans 22 can be arranged at intervals along the length of the partition 13.

[0067] The motor 23 can be located between the two fans 22. The motor 23 is a dual-shaft motor 23. The two output shafts 231 of the motor 23 are drive shafts 230, and each of the two drive shafts 230 is connected to a fan 22 to drive the fan 22 to rotate.

[0068] In some embodiments, refer to Figure 3 and Figure 4 The fan assembly 20 includes three fans 22. The three fans 22 can be arranged at intervals along the length of the partition 13.

[0069] The motor 23 is located between any two adjacent fans 22. The first side of the motor 23 has one fan 22, and the second side of the motor 23 has two fans 22.

[0070] The output shaft 231 on the first side of the motor 23 is a drive shaft 230, and the drive shaft 230 on this side is connected to a fan 22.

[0071] The output shaft 231 on the second side of the motor 23 can be connected to the drive shaft 232 via a coupling 26, thereby extending the output shaft 231. The output shaft 231 and the drive shaft 232 on this side constitute the drive shaft 230. The drive shaft 230 is connected to the two fans 22 on this side.

[0072] This application improves the connection structure between the drive shaft 230 and the fan 22:

[0073] In some embodiments, refer to Figures 5 to 10 The fan 22 includes a central plate 221. The outer periphery of the central plate 221 may be circular.

[0074] The fan 22 may include blades 222. The blades 222 are connected to the central disk 221. Multiple blades 222 may be arranged along the circumference of the central disk 221.

[0075] The fan 22 includes a collar 30 for connection to a drive shaft 230. The collar 30 extends axially along the fan 22. The collar 30 is connected to the center of the center plate 221 and protrudes axially from the center plate 221.

[0076] The collar 30 has a through portion 30a extending axially for the drive shaft 230 to pass through. During assembly, the collar 30 of the fan 22 can be fitted onto the drive shaft 230.

[0077] In some embodiments, see specific references Figure 5 and Figure 6 The fan assembly 20 may include a fastener 40. The fastener 40 is connected to the collar 30.

[0078] Fasteners such as screws or bolts are radially screwed from the fan 22 to the fixing member 40, and the ends of the fasteners press against the drive shaft 230, thereby connecting the fan 22 and the drive shaft 230 and preventing the drive shaft 230 from moving relative to the fan 22.

[0079] In this application, by setting a fixing member 40 connected to the fan 22, and then fastening the drive shaft 230 by screwing the fixing member 40 with fasteners, the drive shaft 230 can drive the fan 22 to rotate. Compared with the complex structure and high cost of connecting the fan 22 and the drive shaft 230 by bushing in the prior art, the connection structure of this application is simpler and has a lower cost.

[0080] In some embodiments, the fastener 40 may be a metal part, such as a steel part. The fastener 40 may be a sheet metal part, such as a steel plate.

[0081] In some embodiments, refer to Figure 5 , Figure 6 , Figure 11 and Figure 12 The fastener 40 includes a platform portion 41. The platform portion 41 is located on the outer periphery of the collar 30. A fastening screw 25 is screwed onto the platform portion 41 and then passes through the side wall of the collar 30, such that the end of the fastening screw 25 abuts against the drive shaft 230.

[0082] In some embodiments, the platform portion 41 is provided with a threaded mounting hole 410. A fastening screw 25 is connected to the mounting hole 410.

[0083] In some embodiments, a self-tapping screw is screwed into the platform portion 41, thereby forming a thread on the platform portion 41.

[0084] In some embodiments, combined with Figure 5 , Figure 6 , Figure 8 and Figure 9 The collar 30 has a clearance portion 30b on its side wall for the fastening screw 25 to pass through. The clearance portion 30b is opposite to the platform portion 41. The clearance portion 30b is coaxial with the mounting hole 410. The fastening screw 25 passes through the clearance portion 30b.

[0085] In some embodiments, refer to Figure 7 A clearance hole 2221 may be provided on the blade 222. The clearance hole 2221 corresponds to the clearance portion 30b on the collar 30. The clearance hole 2221 and the clearance portion 30b on the collar 30 are coaxial.

[0086] The diameter of the clearance hole 2221 is D2, and D2≥5mm, which is beneficial for tools such as screwdrivers to pass through the clearance hole 2221.

[0087] During assembly, operators can insert tools such as screwdrivers through the clearance hole 2221 into the collar 30 to tighten the fastening screws 25. Therefore, the clearance hole 2221 on the blade 222 facilitates assembly and maintenance operations and improves assembly efficiency.

[0088] In some embodiments, the fastener 40 is sleeved on the drive shaft 230 and limited on the collar 30.

[0089] In some embodiments, continue to refer to Figures 5 to 7 , Figure 10 The fastener 40 includes an end plate 44. The end plate 44 is connected to the platform portion 41.

[0090] Specifically, the end plate 44 is connected to the platform portion 41 at an angle. The platform portion 41 can abut against the outer peripheral surface of the collar 30, and the plate surface of the end plate 44 is perpendicular to the axis of the collar 30. The end plate 44 can be formed by bending the platform portion 41.

[0091] The end plate 44 is provided with a through limiting hole 441 for the drive shaft 230 to pass through. The through-hole cooperation between the end plate 44 and the drive shaft 230 can limit the radial movement of the fixing member 40 relative to the fan 22.

[0092] In some embodiments, a limiting structure is provided between the platform portion 41 and the collar 30 so that the fixing member 40 can be limited on the collar 30.

[0093] For ease of description, the axial fastener 40 of the fan 22 is mounted on the collar 30 from back to front, and the fastening screw 25 is screwed into the fastener 40 from top to bottom.

[0094] In some embodiments, refer to Figure 5 and Figure 6 The fixing member 40 may include a plug-in portion 45. The plug-in portion 45 is connected to the platform portion 41. The plug-in portion 45 is inserted into the fan 22 to restrict the rotation of the plug-in portion 45 relative to the fan 22.

[0095] In some embodiments, refer to Figure 5 The insertion portion 45 is formed by extending forward from the end of the platform portion 41. The middle plate 221 is provided with an insertion groove 39, which is formed by recessing forward from the rear end face of the middle plate 221. The insertion portion 45 is inserted into the insertion groove 39 from rear to front.

[0096] Due to the cooperation between the plug-in part 45 and the plug-in slot 39, a limit is formed between the fixing member 40 and the fan 22, ensuring that the fixing member 40 can remain stationary relative to the fan 22.

[0097] In some embodiments, refer to Figure 6 and Figure 8 The insertion groove 39 is provided on the side wall of the collar 30. The insertion groove 39 can be formed by recessing from the outer side of the collar 30 in the direction (downward) towards the through portion 30a.

[0098] Reference Figure 11 The insertion part 45 can be formed by extending downward from the platform part 41. The insertion part 45 is inserted into the insertion groove 39 from top to bottom.

[0099] The insertion part 45 cooperates with the insertion slot 39 to restrict the axial movement of the fixing member 40 relative to the fan 22, and to restrict the rotation of the fixing member 40 relative to the fan 22.

[0100] In some embodiments, the plug portion 45 is connected to the side of the platform portion 41 away from the end plate 44. The end plate 44 is located on the rear side of the platform portion 41, and the plug portion 45 is located on the front side of the platform portion 41.

[0101] The insertion part 45 is formed by bending the front end of the platform part 41 downward.

[0102] In some embodiments, in conjunction with reference Figure 10 and Figure 11 The collar 30 is provided with a first insertion groove surface 391 and a second insertion groove surface 392 forming an insertion groove 39. The first insertion groove surface 391 and the second insertion groove surface 392 are arranged opposite to each other, and their arrangement direction is perpendicular to the front-back direction.

[0103] The insertion part 45 has a first limiting surface 451. In the assembled state, the first limiting surface 451 faces the first insertion groove surface 391.

[0104] The insertion part 45 has a second limiting surface 452. In the assembled state, the second limiting surface 452 faces the second insertion groove surface 392.

[0105] When the first limiting surface 451 abuts against the first insertion slot surface 391, it can restrict the fixing member 40 from rotating relative to the fan 22 in the first direction.

[0106] When the second limiting surface 452 abuts against the second insertion slot surface 392, it can restrict the fixing member 40 from rotating relative to the fan 22 in the opposite direction to the first direction.

[0107] In some embodiments, the collar 30 is provided with a third insertion groove surface 393 that forms an insertion groove 39. The third insertion groove surface 393 is located on the front side of the insertion groove 39, which is also the side away from the avoidance part.

[0108] The insertion part 45 includes a third limiting surface 453, which is the front side surface of the insertion part 45.

[0109] In this application, the fastening screw 25 presses against the drive shaft 230, exerting downward pressure on the drive shaft 230. The drive shaft 230 exerts an upward reaction force on the fastening screw 25. Due to the friction between the third limiting surface 453 and the third insertion groove surface 393, and the limiting effect of the upper limit hole 441 of the fixing member 40 on the drive shaft 230, the fixing member 40 is prevented from moving away from the drive shaft 230, thereby effectively fixing the fan 22 to the drive shaft 230.

[0110] In some embodiments, refer to Figure 8 The outer peripheral surface of the collar 30 includes an arc surface and a first plane 3421 connected to the arc surface. The arc surface and the first plane 3421 are connected end to end. The platform portion 41 can abut against the first plane 3421.

[0111] In this application, by providing a first plane 3421 on the collar 30, the limiting of the fastener 40 and the collar 30 is a surface limiting, which can increase the reliability of the limiting. Moreover, the platform part 412 can be in the shape of a square block or a plate, which is beneficial to the processing and forming of the fastener 40.

[0112] If the surface used for limiting the movement between the collar 30 and the fastener 40 is an arc-shaped surface, then the platform part 41 also needs to be made into an arc shape, which will increase the manufacturing difficulty of the fastener 40.

[0113] In some embodiments, refer to Figure 11 The fixing member 40 may include a limiting part 46. The limiting part 46 is connected to the end plate 44.

[0114] The limiting part 46 is perpendicularly connected to the end plate 44. Both the limiting part 46 and the platform part 41 extend from the end plate 44 toward the collar 30. The limiting part 46 is provided with a limiting groove 461.

[0115] Combination Figure 8 The collar 30 is provided with a limiting rib 382. In the assembled state, the limiting rib 382 is inserted into the limiting groove 461 of the limiting part 46.

[0116] In this application, the fixing part 46 and the limiting rib wall 382 can be used to limit the fixing part 40 and the collar 30 together, so as to prevent the fixing part 40 from moving relative to the collar 30.

[0117] In some embodiments, refer to Figure 12 With reference to the surface Lp that passes through the center of the limiting hole 441 and is parallel to the platform part 41, the limiting part 46 and the platform part 41 are located on both sides of the surface Lp.

[0118] In other words, the platform part 41 is located on the upper side of the surface Lp, and the limiting part 46 is located on the lower side of the surface Lp.

[0119] The engagement of the plug-in part 45 and the plug-in slot 39 limits the upper part of the fastener 40 to the fan 22, and the engagement of the limiting part 46 and the limiting rib wall 382 limits the lower part of the fastener 40 to the fan 22, thus ensuring the stability of the connection between the fastener 40 and the fan 22.

[0120] Reference Figure 13 The limiting part 46 has a first groove side 462 and a second groove side 463, the first groove side 462 and the second groove side 463 are opposite to each other, and the space between them forms a limiting groove 461.

[0121] Projected onto a plane perpendicular to the axis of the limiting hole 441, there exists a diameter of the limiting hole 441 located between the first groove side surface 462 and the second groove side surface 463.

[0122] In some embodiments, the limiting portion 46 is connected to the end of the end plate 44 away from the platform portion 41. The limiting groove 461 extends through the limiting portion 46 in the thickness direction. The end of the limiting groove 461 away from the end plate 44 is open.

[0123] The limiting rib wall 382 is located below the through portion 30a. Projected onto a plane perpendicular to the axis of the collar 30, the diameter of the collar 30 perpendicular to the platform portion 41 passes through the limiting rib wall 382.

[0124] In some embodiments, refer to Figure 8 The collar 30 includes an outer ring portion 34. The outer ring portion 34 forms the external structure of the collar 30.

[0125] The outer ring 34 can be formed by connecting an arc segment 341 and a flat plate segment 342 end to end.

[0126] The circular arc segment 341 is curved. The flat plate segment 342 is flat and connects the two ends of the circular arc segment 341.

[0127] The outer surface of the plate segment 342 is the first plane 3421. The platform portion 41 of the fastener 40 abuts against the outer surface of the plate segment 342.

[0128] In some embodiments, the collar 30 includes an inner ring portion 35. The inner ring portion 35 is annular. The inner ring portion 35 is located within the outer ring portion 34. The inner ring portion 35 is coaxial with the arc segment 341.

[0129] A through portion 30a is formed inside the inner ring portion 35. The drive shaft 230 is inserted into the inner ring portion 35. The axial end of the inner ring portion 35 is provided with an inner chamfer, which facilitates the insertion operation of the drive shaft 230 into the inner ring portion 35.

[0130] One axial end of the inner ring 35 is connected to the middle plate 221, and the other axial end of the inner ring 35 is located on the side away from the middle plate 221.

[0131] In some embodiments, the inner ring portion 35 is connected to the plate segment 342. The upper end of the inner ring portion 35 is connected to the lower side of the plate segment 342. The clearance portion 30b passes through both the plate segment 342 and the inner ring portion 35 at the connection point.

[0132] The outer circumference of the inner ring 35 intersects with the flat plate segment 342.

[0133] In some embodiments, refer to Figure 9 and Figure 12 The distance from the rear end face of the collar 30 to the rear edge of the insertion groove 39 is Le1. The distance between the upper end plate 44 of the fastener 40 and the insertion part 45 is Lf1. Le1≤Lf1 ensures that the insertion part 45 can be inserted into the insertion groove 39.

[0134] In some embodiments, refer to Figure 9 and Figure 12 The width of the insertion slot 39 in the front-to-back direction is Le2. The thickness of the insertion part 45 on the fastener 40 in the front-to-back direction is Lf2. Lf2≤Le2 ​​ensures that the insertion part 45 can be inserted into the insertion slot 39.

[0135] Le2≤Lf2+1mm, the gap between the plug part 45 and the plug groove 39 in the front-to-back direction is relatively small, which ensures the limiting effect of both and avoids the problem of axial movement of the fixing part 40 relative to the fan 22 when the gap is too large.

[0136] In some embodiments, refer to Figure 10 and Figure 12, on the collar 30, the maximum distance from the first plane 3421 to the edge of the through portion 30a is Le3; on the platform portion 41, the maximum distance from the side surface near the collar 30 to the edge of the limiting hole 441 is Lf3. Le3 ≤ Lf3 can ensure that the platform portion 41 can be installed outside the first plane 3421 and the drive shaft 230 can pass through the limiting hole 441 of the fixing member 40.

[0137] Lf3 ≤ Le3 + 1 mm. When the fastening screw 25 abuts against the drive shaft 230, the drive shaft 230 acts on the fastening screw 25 in the opposite direction, giving the fastening screw 25 an upward force. The fastening screw 25 causes the fixing member 40 to have a small movement away from the drive shaft 230. Since Lf3 ≤ Le3 + 1 mm, the lower part of the circular side surface of the fixing member 40 that encloses the limiting hole 441 can abut against the drive shaft 230, restricting the upward movement of the fixing member 40, thereby ensuring that the fastening screw 25 can tightly abut against the drive shaft 230.

[0138] In some embodiments, referring to Figure 10 and Figure 13 , the length of the insertion slot 39 is Le4, and the length of the insertion portion 45 is Lf4. Lf4 < Le4 can ensure that the insertion portion 45 can be inserted into the insertion slot 39.

[0139] Le4 ≤ Lf4 + 1 mm. The fitting clearance between the insertion portion 45 and the insertion slot 39 in the length direction is relatively small, ensuring the limiting effect between the two and avoiding the problem that the fixing member 40 rotates relative to the fan 22 when the clearance is too large.

[0140] In some embodiments, the plate thickness Tb of the fixing member 40 satisfies: 0.8 mm ≤ Tb. Within this dimensional range, the structural strength of the fixing member 40 can be ensured, avoiding the problem that the fixing member 40 is too thin and prone to deformation.

[0141] Tb ≤ 5 mm. Within this range, it is possible to avoid increasing the overall weight at the fan 22 due to the fixing member 40 being too thick.

[0142] In some embodiments, referring to Figure 8 , the fan 22 is provided with a limiting rib 224. The limiting rib 224 is connected to the middle plate 221 and the collar 30.

[0143] Among the adjacent two side surfaces of the limiting rib 224, one side surface is connected to the middle plate 221, and the other side surface is connected to the collar 30. The limiting rib 224 is connected to the first plane 3421.

[0144] There are two limiting ribs 224, namely a first limiting rib 2241 and a second limiting rib 2242. The first limiting rib 2241 and the second limiting rib 2242 are arranged at intervals. The platform portion 41 of the fixing member 40 is located within the space between the first limiting rib 2241 and the second limiting rib 2242.

[0145] In some embodiments, from back to front, the distance between the two sides of the platform portion 41 that are in the same direction as the two limiting ribs 224 gradually decreases, so that the platform portion 41 presents a structure that is narrow at the front end and wide at the rear end. This is beneficial for the platform portion 41 to be installed between the two limiting ribs 224.

[0146] In some embodiments, the platform portion 41 has a first inclined surface 414 and a second inclined surface 415. In the assembled state, the first inclined surface 414 faces the first limiting rib 2241, and the second inclined surface 415 faces the second limiting rib 2242.

[0147] From back to front, the first inclined plane 414 and the second inclined plane 415 tilt toward each other.

[0148] In some embodiments, refer to Figure 13 The edges of the insertion portion 45 and the platform portion 41 form a stepped shape. The minimum distance between the first inclined surface 414 and the second inclined surface 415 is Lf5. Lf4 <Lf5。

[0149] Lf4>(1 / 2)Lf5, thus ensuring that the mating length of the plug part 45 and the plug slot 39 is relatively large, ensuring the limiting effect when the two are mated.

[0150] In some embodiments, in the assembled state, there is a gap between the limiting part 46 and the inner ring part 35 to ensure that the limiting part 46 does not interfere with the ring 30 when the fastener 40 is installed onto the collar 30.

[0151] In some embodiments, refer to Figure 6 In the assembled state, the insertion part 45 penetrates the insertion groove 39 to a depth of Lf6. In the direction perpendicular to the platform part 41 (up and down direction), the minimum distance between the limiting part 46 and the inner ring part 35 is Lf7, where Lf7>Lf6. In this way, the limiting part 46 will not interfere with the inner ring part 35 before the fastener 40 is installed on the collar 30 and before the insertion part 45 is inserted into the insertion groove 39, so as to ensure that the fastener 40 can be installed on the collar 30.

[0152] In some embodiments, refer to Figure 8 The collar 30 includes a plurality of first reinforcing ribs 381. The plurality of first reinforcing ribs 381 are radially connected between the outer ring portion 34 and the inner ring portion 35.

[0153] The structural strength of the collar 30 can be enhanced by setting multiple first reinforcing ribs 381.

[0154] In some embodiments, the fan 22 is provided with a second reinforcing rib 225. The second reinforcing rib 225 is radially connected to the outer periphery of the collar 30 and is connected to the central plate 221. The second reinforcing rib 225 can increase the structural strength of the central plate 221.

[0155] The second reinforcing rib 225 is roughly triangular in shape. One side of the second reinforcing rib 225 that forms a triangle is connected to the middle plate 221, and the other side of the second reinforcing rib 225 that forms a triangle is connected to the outer periphery of the collar 30.

[0156] The first reinforcing rib 381 and the second reinforcing rib 225 are located on different diameters of the collar 30. The first reinforcing rib 381 and the second reinforcing rib 225 are distributed in a circumferential direction, which can maximize the structural strength of the fan 22.

[0157] The fan 22 can be mounted onto the drive shaft 230 as follows: First, fix the fastener 40 onto the fan 22, then pass the through portion 30a in the middle of the fan 22 through the drive shaft 230, so that the fan 22 is in the desired position on the drive shaft 230. Insert a screwdriver into the clearance hole 2221 of the fan 22 and screw the fastening screw 25 into the mounting hole 410 on the fastener 40 to effectively fix the fan 22 onto the drive shaft 230.

[0158] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

[0159] For ease of explanation, the above description has been provided in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. Various modifications and variations can be obtained based on the above teachings. The selection and description of the above embodiments are for the purpose of better explaining the principles and practical applications, thereby enabling those skilled in the art to better utilize the described embodiments and various different variations of embodiments suitable for specific use considerations.

Claims

1. A fan assembly, characterized in that, include: The motor is connected to a drive shaft; Fans, including: A collar, extending axially along the fan, is provided with: A through-hole is provided for the drive shaft to pass through; A clearance portion is provided on the side wall of the collar, and the clearance portion communicates with the through portion; A fastener, connected to the collar, the fastener comprising: An end plate is provided with a limiting hole for the drive shaft to pass through; The platform section is connected to the end plate and located on the outside of the collar; A plug-in portion is connected to the side of the platform portion away from the end plate. The plug-in portion is inserted into the fan to restrict the rotation of the plug-in portion relative to the fan. Fasteners are screwed onto the platform portion and pass through the clearance portion, with the end of the fastener abutting against the drive shaft to tighten the drive shaft.

2. The wind turbine assembly according to claim 1, characterized in that, The collar is provided with a insertion groove, which is recessed from the outer side of the collar toward the through portion, and the insertion portion is inserted into the insertion groove.

3. The wind turbine assembly according to claim 1, characterized in that, The collar includes: The outer ring portion has interconnected arc segments and flat plate segments, wherein the flat plate segments abut against the platform portion; An inner ring portion is provided within the outer ring portion, and the through portion is formed inside the inner ring portion.

4. The wind turbine assembly according to claim 3, characterized in that, The collar also includes: A limiting rib is connected between the inner ring portion and the outer ring portion; The fastener also includes: A limiting part is connected to the end plate, and the limiting part is provided with a limiting groove, which is inserted into the limiting rib wall.

5. The wind turbine assembly according to claim 4, characterized in that, With reference to a surface Lp that passes through the axis of the limiting hole and is parallel to the platform portion, the limiting portion and the platform portion are located on opposite sides of surface Lp.

6. The wind turbine assembly according to claim 1, characterized in that, The outer surface of the collar includes a first plane, and the platform portion abuts against the first plane; On the collar, the maximum distance from the first plane to the edge of the through portion is Le3; the maximum distance from the platform portion to the edge of the limiting hole is Lf3, Le3≤Lf3≤Le3+1mm.

7. The wind turbine assembly according to claim 2, characterized in that, In the assembled state, the side of the collar that forms the insertion groove that is furthest from the clearance portion abuts against the insertion portion.

8. The wind turbine assembly according to claim 1, characterized in that, In the assembled state, the portion of the side of the end plate that forms the limiting hole, away from the platform portion, abuts against the drive shaft.

9. The wind turbine assembly according to any one of claims 1-8, characterized in that, The fan assembly is a centrifugal fan.

10. A ducted air conditioner, characterized in that, include: The housing has an air inlet and an air outlet. A heat exchanger, located inside the housing, is used to exchange heat with the air passing through it; The fan assembly as described in any one of claims 1-9 is used to drive air from the air inlet to the heat exchanger and then blow it out from the air outlet.

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