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 which extends in the axial direction, and the shaft ring is provided with a penetrating part for 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 clamped on the side wall of the shaft ring; and the fastening piece is in threaded connection with the fixing piece 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 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 the shaft sleeve, the outer wall of the shaft sleeve is sleeved with the damping rubber ring, and the shaft sleeve is used for connecting with the motor output shaft or 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 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 includes a motor, a fan, a fixing member and a fastener; the motor is connected with a driving shaft;

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

[0006] The fixing member is clamped on the side wall of the collar;

[0007] The fastener is screwed on the fixing member and passes through the avoiding portion, and the end 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 screwing the fixing member through the fastener. 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 collar is provided with a recess recessed inwardly from the end face of the collar;

[0010] The fixing member includes: a platform portion connected to the outer side of the collar, the platform portion being screwed with the fastener; a clamping jaw spaced apart from the platform portion and inserted into the recess; and a connecting portion connected between the platform portion and the clamping jaw.

[0011] In the present application, the clamping jaw of the fixing member can be inserted into the recess, so as to realize the clamping of the platform portion and the clamping jaw from the inner and outer sides of the collar, thereby realizing the connection of the fixing member on the collar. This connection structure is relatively simple and does not need to embed the fixing member into the mold during the injection molding of the fan.

[0012] In some embodiments, the fan further comprises a middle disc and a limiting stud; the collar is connected to the middle of the middle disc and protrudes axially from the middle disc; the two limiting studs are arranged at intervals and are connected to the outer periphery of the middle disc and the collar; and the platform part is inserted between the two limiting studs.

[0013] In the present application, the fixing member is limited by the limiting stud on the fan, and the limiting structure is simplified.

[0014] In some embodiments, the two limiting studs are respectively a first limiting stud and a second limiting stud; and the part of the platform part that is limited between the two limiting studs is an extension part.

[0015] The extension part has: a first positioning plane facing the first limiting stud; a second positioning plane facing the second limiting stud, the arrangement direction of the second positioning plane and the first positioning plane being the same as the arrangement direction of the two limiting studs; a first inclined surface connected to one end of the first positioning plane away from the connecting part; and a second inclined surface connected to one end of the second positioning plane away from the connecting part, the second inclined surface and the first inclined surface being inclined towards each other in the direction close to the middle disc.

[0016] In the present application, by providing the first inclined surface and the second inclined surface on the fixing member, the two inclined surfaces have a guiding effect on the installation of the extension part to the fan, and the assembly efficiency can be improved.

[0017] In some embodiments, the platform part comprises: a platform body part; and an extension part extending from the end surface of the platform body part in a direction away from the connecting part, the extension part being limited between the two limiting studs, and a step surface being formed at the connection between the extension part and the platform body part; and the step surface abuts against the end surface of the limiting stud away from the middle disc.

[0018] In the present application, by providing the step surface on the fixing member, the step surface abuts against the limiting stud, which can serve as a mark for the installation of the fixing member and the collar in place, and is conducive to the installation of the fixing member to the fan.

[0019] In some embodiments, the outer peripheral surface of the collar comprises a first plane, and the platform part abuts against the first plane.

[0020] In the present application, by arranging the platform part of the fixing member to abut against the first plane of the collar, the contact area between the two can be ensured to be relatively large, the reliability of the limiting can be improved, and the platform part in the form of a flat plate is relatively easy to process.

[0021] In some embodiments, the side of the side surface surrounding the recess that is close to the first plane is a second plane, and the second plane is used to limit the movement of the claw in the direction close to the first plane when abutting against the claw.

[0022] In some embodiments, the second plane is provided with a protrusion, the distance from the protrusion to the first plane is Lb1, the distance between the platform and the claw is La1, and Lb1≤La1≤Lb1+4mm.

[0023] In the present application, the cooperation gap of the fixing member clamping the collar is relatively small, which can avoid the shaking of the fixing member relative to the fan to affect the tightening effect of the fastener.

[0024] In some embodiments, the collar comprises: an outer ring portion comprising circular arc segments and flat plate segments connected to each other; an inner ring portion provided in the outer ring portion, the inner ring portion being provided with a through portion. The space between the inner ring portion and the outer ring portion forms a recess; a platform portion is provided on the outer side of the flat plate segment, and a claw is provided on the inner side of the flat plate segment.

[0025] In the present application, the space between the outer ring portion and the inner ring portion is used as the recess for the claw insertion, which simplifies the structure of the collar and reduces the cost.

[0026] In some embodiments, the blade is provided with an avoiding hole, the avoiding hole is opposite to and coaxial with the avoiding portion.

[0027] In the present application, by providing the avoiding hole on the blade, the operator can insert the tool from the avoiding hole into the fan for tightening operation of the fastener.

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

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

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

[0031] Figure 3 A sectional view of a ducted fan machine according to some embodiments is shown from another perspective;

[0032] Figure 4 A Figure 3 enlarged view in the l direction is shown;

[0033] Figure 5 A schematic view of a fan in a fan assembly according to some embodiments is shown;

[0034] Figure 6 A partial schematic view of a fan in a fan assembly according to some embodiments is shown;

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

[0036] Figure 8 A side view of a fixing member in a fan assembly according to some embodiments is shown;

[0037] Figure 9 A side view of a fixing member in a fan assembly according to some embodiments is shown from another perspective;

[0038] Figure 10 A partial rear view of a fan in a fan assembly according to some embodiments is shown;

[0039] Figure 11 A partial side view of a fan in a fan assembly according to some embodiments is shown.

[0040] In the above figures, 10, housing; 10a, air outlet; 10b, air inlet; 11, bottom plate; 12, top plate; 13, middle partition plate; 141, air inlet cavity; 142, air outlet cavity; 20, fan assembly; 21, volute; 21a, air suction port; 21b, air outlet port; 211, air outlet portion; 22, fan; 221, middle disc; 222, blade; 2221, avoiding hole; 224, limiting vertical rib; 2241, first limiting vertical rib; 2242, second limiting vertical rib; 225, second reinforcing rib; 23, motor; 230, driving shaft; 231, output shaft; 232, transmission shaft; 25, fastening screw; 26, shaft coupling; 30, collar; 30a, through portion; 30b, avoiding portion; 30c, recessed portion; 34, outer ring portion; 341, circular arc segment; 342, flat plate segment; 3421, first plane; 3422, second plane; 3423, protrusion; 35, inner ring portion; 381, first reinforcing rib; 40, fixing member; 41, platform portion; 410, mounting hole; 411, extending portion; 412, first positioning plane; 413, second positioning plane; 414, first inclined surface; 415, second inclined surface; 416, platform body portion; 417, step surface; 42, clamping jaw; 43, connecting portion; 50, heat exchanger. DETAILED DESCRIPTION

[0041] For the purpose of making the objects and implementation of the present application more clear, the following will combine the drawings in the exemplary embodiments of the present application to make a clear and complete description of the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only some of the embodiments of the present application, but not all the embodiments.

[0042] In the description of the present application, it needs to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0043] The terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, "a plurality of" means two or more, unless otherwise specified.

[0044] In the description of the present application, it needs to be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0045] The air conditioner performs the refrigeration cycle of the air conditioner by using a compressor, a condenser, an expansion valve, and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies refrigerant to the air that has been adjusted and heat-exchanged.

[0046] The compressor compresses the refrigerant gas in a low-temperature and low-pressure state 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.

[0047] The expansion valve expands the liquid-phase refrigerant in a high-temperature and high-pressure state condensed in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator can achieve a refrigeration effect by exchanging heat with a material to be cooled using the latent heat of evaporation of the refrigerant. Throughout the cycle, the air conditioner can adjust the temperature of the indoor space.

[0048] The outdoor unit of the air conditioner refers to the part of the refrigeration cycle including the compressor and the outdoor heat exchanger, the indoor unit of the air conditioner includes the indoor heat exchanger, and the expansion valve can be provided in the indoor unit or the outdoor unit.

[0049] The indoor heat exchanger and the outdoor heat exchanger serve as a condenser or an evaporator. When the indoor heat exchanger serves as a condenser, the air conditioner serves as a heater in a heating mode, and when the indoor heat exchanger serves as an evaporator, the air conditioner serves as a cooler in a cooling mode.

[0050] The ducted-type air conditioner according to the present application belongs to the air conditioner.

[0051] Referring to Figure 1 and Figure 2 , the ducted-type air conditioner according to the present application includes a housing 10.

[0052] The housing 10 has a substantially rectangular parallelepiped shape, and forms an outer appearance of the ducted-type air conditioner. The housing 10 includes a bottom plate 11 forming a bottom structure, a top plate 12 forming a top structure, and side plates connected between the bottom plate 11 and the top plate 12.

[0053] A blow-out port 10a is provided on one side plate of the housing 10. An air inlet port 10b is provided on a side of the housing 10 opposite to the blow-out port 10a, or an air inlet port 10b is provided on a side of the bottom plate 11 of the housing 10 away from the blow-out port 10a.

[0054] Indoor air enters the housing 10 through the air inlet port 10b and returns to an indoor space through the blow-out port 10a.

[0055] A partition 13 is provided in the housing 10. The partition 13 divides a space in the housing 10 into two chambers, one of which is an air inlet chamber 141 and the other of which is an air outlet chamber 142.

[0056] The air inlet port 10b communicates with the air inlet chamber 141, and the blow-out port 10a communicates with the air outlet chamber 142.

[0057] The ducted-type air conditioner includes a blower assembly 20. The blower assembly 20 can be disposed in the air inlet chamber 141.

[0058] The blower assembly 20 can be a centrifugal blower including a scroll casing 21. The scroll casing 21 has suction ports 21a provided on both sides thereof perpendicular to an axis thereof.

[0059] The scroll casing 21 has an air outlet portion 211 formed at an end portion thereof. The air outlet portion 211 is a portion extending outward from a cylindrical portion of the scroll casing 21.

[0060] The air outlet portion 211 of the scroll casing 21 penetrates the partition 13, or the air outlet port 21b of the scroll casing 21 is opposite to an opening in the partition 13, so that the air outlet port 21b of the scroll casing 21 communicates with the air outlet chamber 142.

[0061] The blower assembly 20 includes a fan 22. The fan 22 is provided in the scroll casing 21. Specifically, the fan 22 can be disposed in the cylindrical portion of the scroll casing 21.

[0062] The blower assembly 20 can include a motor 23. The motor 23 provides a rotating driving force to the outside when an external power source is turned on. The motor 23 is connected with a driving shaft 230, which is connected with the fan 22 to drive the fan 22 to rotate.

[0063] When the motor 23 is powered on, the fan 22 rotates, so that the indoor air enters the air inlet cavity 141 through the air inlet 10b, then flows into the volute 21 through the air inlet 21a, and continues to be blown to the air outlet cavity 142 through the air outlet 21b of the volute 21, and finally is sent to the indoor through the air outlet 10a.

[0064] The ducted-type air conditioner includes a heat exchanger 50. The heat exchanger 50 is arranged in the air outlet cavity 142 and located on the flow path of the air, for exchanging heat with the air passing through it.

[0065] The air flow generated by the fan 22 flows to the heat exchanger 50 through the air outlet 21b of the volute 21 under the guidance of the volute 21. The air is cooled or heated by exchanging heat with the refrigerant flowing in the heat exchanger 50.

[0066] In some embodiments, the blower assembly 20 includes two fans 22. The two fans 22 can be arranged at intervals along the length direction of the partition plate 13.

[0067] The motor 23 can be arranged between the two fans 22. The motor 23 is a double-shaft motor 23. The two output shafts 231 of the motor 23 are driving shafts 230, and the two driving shafts 230 are connected with one fan 22 respectively to drive the fan 22 to rotate.

[0068] In some embodiments, referring to Figure 3 , the blower assembly 20 includes three fans 22. The three fans 22 can be arranged at intervals along the length direction of the partition plate 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 of the first side of the motor 23 is a driving shaft 230, and the driving shaft 230 of this side is connected with one fan 22.

[0071] The output shaft 231 of the second side of the motor 23 can be connected with a transmission shaft 232 through a shaft coupling 26, so that the output shaft 231 is extended, and the output shaft 231 and the transmission shaft 232 of this side are driving shafts 230. The driving shafts 230 are connected with the two fans 22 of this side.

[0072] The connection structure of the driving shaft 230 and the fan 22 is improved in the present application:

[0073] In some embodiments, referring to Figures 4 to 6 , the fan 22 comprises a middle disc 221. The outer periphery of the middle disc 221 can be circular.

[0074] In some embodiments, the fan 22 can comprise blades 222. The blades 222 are connected to the middle disc 221. A plurality of blades 222 can be arranged along the circumferential direction of the middle disc 221.

[0075] In some embodiments, the fan 22 comprises a collar 30 for connecting to the driving shaft 230. The collar 30 is located at the center of the fan 22. The collar 30 extends along the axial direction of the fan 22.

[0076] In some embodiments, the collar 30 is connected to the middle part of the middle disc 221, and the collar 30 protrudes axially from the middle disc 221. The collar 30 is provided with a through portion 30a penetrating along the axial direction for the driving shaft 230 to pass through.

[0077] When assembled, the collar 30 of the fan 22 can be sleeved on the driving shaft 230.

[0078] In some embodiments, the fan assembly 20 can comprise a fixing member 40. The fixing member 40 is connected to the collar 30.

[0079] The fastener such as a screw or a bolt is screwed from the radial direction of the fan 22 to the fixing member 40, and the end of the fastener abuts against the driving shaft 230, so as to realize the connection of the fan 22 and the driving shaft 230, and prevent the driving shaft 230 from rotating relative to the fan 22.

[0080] In the present application, by arranging a fixing member 40 connected to the fan 22, and then abutting the driving shaft 230 against the fixing member 40 by screwing the fixing member 40 through the fastener, the driving shaft 230 can drive the fan 22 to rotate. Compared with the structure in the prior art in which the fan 22 is connected to the driving shaft 230 through a shaft sleeve, the connection structure of the present application is simpler and has lower cost.

[0081] In some embodiments, the fixing member 40 can be a metal piece, for example, a rigid piece. The fixing member 40 can be a sheet metal piece, for example, a steel plate.

[0082] In some embodiments, referring to Figure 4 , Figure 6 and Figure 7 , the fixing member 40 comprises a platform portion 41. The platform portion 41 is arranged at the outer periphery side of the collar 30. The fastening screw 25 is screwed to the platform portion 41, and then penetrates the side wall of the collar 30, so that the end of the fastening screw 25 abuts against the driving shaft 230.

[0083] In some embodiments, the platform portion 41 is provided with a threaded mounting hole 410. The fastening screw 25 is connected in the mounting hole 410.

[0084] In some embodiments, a self-tapping screw is screwed into the platform portion 41, thereby forming a thread on the platform portion 41.

[0085] In some embodiments, the sidewall of the collar 30 is provided with a clearance portion 30b 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.

[0086] In some embodiments, 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.

[0087] 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.

[0088] During assembly, operators can insert tools such as screwdrivers through the clearance hole 2221 into the collar 30 to tighten screws. Therefore, the clearance hole 2221 on the blade 222 facilitates assembly and maintenance operations and improves assembly efficiency.

[0089] In some embodiments, the fastener 40 is clamped to the side wall of the collar 30.

[0090] The retaining member 40 may include a jaw 42 that extends into the interior of the collar 30. The platform portion 41 and the jaw 42 clamp the side walls of the collar 30 from both the inner and outer sides.

[0091] In this application, by providing a platform portion 41 and a claw 42 on the fixing member 40, and by having the platform portion 41 and the claw 42 clamp the side wall of the collar 30, the fixing member 40 and the collar 30 can be radially limited.

[0092] The fastening screw 25 passes through the side wall of the fixing member 40 and the collar 30, which can limit the fixing member 40 and the collar 30 in the axial direction.

[0093] In some embodiments, the fastener 40 may include a connecting portion 43. The connecting portion 43 is used to connect the platform portion 41 and the claw 42.

[0094] In some embodiments, the platform portion 41 and the claw 42 are spaced apart, and the connecting portion 43 is connected between the platform portion 41 and the claw 42.

[0095] In some embodiments, the collar 30 is provided with a recess 30c. The recess 30c is formed by an inward recess from the axial end face of the collar 30.

[0096] The pawl 42 is inserted into the recess 30c of the collar 30 so that the pawl 42 can extend into the interior of the collar 30.

[0097] In some embodiments, the outer circumferential surface of the collar 30 comprises an arc surface, and a first plane 3421 connected to the arc surface.

[0098] The arc surface is connected to the first plane 3421 end to end. The platform portion 41 can abut against the first plane 3421.

[0099] In some embodiments, the recess 30c is a groove provided on the collar 30. The side of the side surface of the recess 30c close to the first plane 3421 is a second plane 3422. The claw 42 can abut against the second plane 3422.

[0100] When the platform portion 41 of the fixing member 40 abuts against the first plane 3421, the movement of the fixing member 40 in the direction close to the second plane 3422, i.e. the direction close to the axis of the collar 30, can be limited; when the claw 42 of the fixing member 40 abuts against the second plane 3422, the movement of the fixing member 40 in the direction close to the first plane 3421 can be limited.

[0101] In the present application, by providing the first plane 3421 and the second plane 3422 on the collar 30, the limiting of the fixing member 40 by the collar 30 is face limiting, which can increase the reliability of the limiting, and the platform portion 41 and the claw 42 can be in the shape of a square block or a plate, which is beneficial to the processing and forming of the fixing member 40.

[0102] If the face for limiting between the collar 30 and the fixing member 40 is an arc face, then the platform portion 41 and the claw 42 also need to be made into an arc shape, which will increase the difficulty of manufacturing the fixing member 40.

[0103] In some embodiments, the second plane 3422 is provided with a protrusion 3423. The length direction of the protrusion 3423 can extend along the axial direction of the fan 22.

[0104] In some embodiments, referring to Figure 8 and Figure 10 , the distance from the protrusion 3423 to the first plane 3421 is Lb1, the distance between the platform portion 41 and the claw 42 is La1, and Lb1 and La1 satisfy: Lb1≤La1, which can ensure that the platform portion 41 and the claw 42 can clamp the collar 30.

[0105] When Lb1=La1, the platform portion 41 and the claw 42 need to be slightly opened to clamp the collar 30. By providing the protrusion 3423, the area of the claw 42 in contact with the collar 30 can be reduced, and the deformation amount of the opening of the platform portion 41 and the claw 42 can be reduced, which is beneficial to the installation of the fixing member 40 to the collar 30.

[0106] In some embodiments, Lb1 and La1 satisfy: La1≤Lb1+4mm. La1 and Lb1 are in a small gap fit.

[0107] If La1>Lb1+4mm, the gap between the fixing member 40 and the collar 30 in the direction perpendicular to the first plane 3421 is large, the movable space between the fixing member 40 and the collar 30 is large, the fixing member 40 moves with the fastening screw 25, and the fastening screw 25 cannot be tightly pressed against the drive shaft 230.

[0108] In some embodiments, the outer end of the length direction of the protrusion 3423 is provided with a chamfer, which has a guiding effect on the insertion of the claw 42 into the recess 30c, and is beneficial to the installation operation of the claw 42 to the recess 30c.

[0109] In some embodiments, continuing to refer to Figure 6 , the collar 30 includes an outer ring portion 34. The outer ring portion 34 forms the outer shape structure of the collar 30.

[0110] The outer ring portion 34 can be formed by connecting a circular arc segment 341 and a flat plate segment 342 at their ends.

[0111] The circular arc segment 341 is a convex arc, and the flat plate segment 342 is in the shape of a flat plate and is connected at both ends of the circular arc segment 341.

[0112] One end of the axial direction of the outer ring portion 34 is connected with the middle disc 221, and the other end of the axial direction of the outer ring portion 34 is located on the side away from the middle disc 221.

[0113] The platform portion 41 and the claw 42 are clamped between the flat plate segment 342, the platform portion 41 is arranged on the outer side of the flat plate segment 342, and the claw 42 is arranged on the inner side of the flat plate segment 342.

[0114] The outer side surface of the flat plate segment 342 is a first plane 3421, and the inner side surface of the flat plate segment 342 is a second plane 3422.

[0115] In some embodiments, the collar 30 includes an inner ring portion 35. The inner ring portion 35 is in the shape of a circular ring. The inner ring portion 35 is located inside the outer ring portion 34. The inner ring portion 35 is coaxial with the circular arc segment 341.

[0116] The inner circle of the inner ring portion 35 forms a through portion 30a. The drive shaft 230 is inserted into the inner ring portion 35. The end portion of the axial direction of the inner ring portion 35 is provided with an inner chamfer, which is beneficial to the insertion of the drive shaft 230 into the inner ring portion 35.

[0117] One end of the axial direction of the inner ring portion 35 is connected with the middle disc 221, and the other end of the axial direction of the inner ring portion 35 is located on the side away from the middle disc 221.

[0118] In some embodiments, the space between the outer ring portion 34 and the inner ring portion 35 forms a recess 30c.

[0119] In some embodiments, the collar 30 includes a plurality of first reinforcing ribs 381. The plurality of first reinforcing ribs 381 are connected between the outer ring portion 34 and the inner ring portion 35 in a radial manner.

[0120] With the plurality of first reinforcing ribs 381, the structural strength of the collar 30 can be enhanced.

[0121] In some embodiments, the first reinforcing ribs 381 divide the space between the outer ring portion 34 and the inner ring portion 35 into a plurality of sub-chambers. The sub-chamber surrounded by the outer ring portion 34 is the recess 30c.

[0122] In some embodiments, the fan 22 is provided with limiting ribs 224. The limiting ribs 224 are connected to the middle disc 221 and the collar 30. The two limiting ribs 224 are spaced apart.

[0123] Among the two adjacent side surfaces of the limiting rib 224, one side surface is connected to the middle disc 221, and the other side surface is connected to the collar 30.

[0124] The limiting rib 224 can be connected to the flat section 342 of the collar 30.

[0125] The platform portion 41 is inserted between the two limiting ribs 224. The limiting ribs 224 limit the platform portion 41 to limit the rotation of the fixing member 40 relative to the collar 30.

[0126] In addition, the limiting rib 224 can serve as a reinforcing rib to enhance the structural strength of the fan 22.

[0127] In some embodiments, referring to Figure 6 and Figure 7 , the end of the platform portion 41 away from the connecting portion 43 is inserted between the two limiting ribs 224.

[0128] In some embodiments, the two limiting ribs 224 are a first limiting rib 2241 and a second limiting rib 2242, respectively.

[0129] The part of the platform portion 41 between the two limiting ribs 224 is an extension portion 411.

[0130] The extension portion 411 includes a first positioning plane 412. The first positioning plane 412 is close to the first limiting rib 2241, specifically, the first positioning plane 412 faces the first limiting rib 2241.

[0131] The extension portion 411 includes a second positioning plane 413. The second positioning plane 413 is close to the second limiting rib 2242, specifically, the second positioning plane 413 faces the second limiting rib 2242.

[0132] The arrangement direction of the first positioning plane 412 and the second positioning plane 413 is the same as the arrangement direction of the two limiting vertical ribs 224.

[0133] Exemplarily, the two limiting vertical ribs 224 are arranged left and right, the first limiting vertical rib 2241 is located at the left side of the second limiting vertical rib 2242, and the second limiting vertical rib 2242 is located at the right side of the first limiting vertical rib 2241.

[0134] The first positioning plane 412 is the left side surface of the extension part 411, and the second positioning plane 413 is the right side surface of the extension part 411.

[0135] When the first positioning plane 412 abuts against the first limiting vertical rib 2241, the movement of the fixing part 40 to the left relative to the fan 22 can be limited; when the second positioning plane 413 abuts against the second limiting vertical rib 2242, the movement of the fixing part 40 to the right relative to the fan 22 can be limited.

[0136] In some embodiments, the extension part 411 comprises a first inclined surface 414. The first inclined surface 414 is connected to one end of the first positioning plane 412 away from the connecting part 43.

[0137] The extension part 411 can comprise a second inclined surface 415. The second inclined surface 415 is connected to one end of the second positioning plane 413 away from the connecting part 43.

[0138] In the mounting direction of the extension part 411 relative to the limiting vertical rib 224, the first inclined surface 414 and the second inclined surface 415 are inclined towards each other.

[0139] For the convenience of description, the mounting direction of the extension part 411 relative to the limiting vertical rib 224 is defined as from back to front.

[0140] From back to front, the distance between the first inclined surface 414 and the second inclined surface 415 gradually decreases.

[0141] Since the distance between the first inclined surface 414 and the second inclined surface 415 is relatively small at the front end, it is beneficial to the plug-in operation of the extension part 411 to the fan 22.

[0142] In some embodiments, referring to Figure 9 and Figure 10 , the distance between the two limiting vertical ribs 224 is Lb2. The distance between the first positioning plane 412 and the second positioning plane 413 is La2.

[0143] La2 < Lb2 is satisfied between Lb2 and La2. In this way, it can be ensured that the extension part 411 can be plugged between the two limiting vertical ribs 224.

[0144] In some embodiments, Lb2 and La2 satisfy the following relationship: Lb2≤La2+8mm. Within this size relationship, the gap between the extension 411 and the two limiting studs 224 can be guaranteed to be relatively small, avoiding the situation where the fixing member 40 can move relatively greatly with respect to the fan 22, thereby affecting the effect of the fastening screw 25 connected to the fixing member 40 in driving the shaft 230.

[0145] In some embodiments, continuing to refer to Figure 6 , the limiting stud 224 is in the shape of a right-angled triangle plate. One of the right-angled sides of the limiting stud 224 is connected to the middle disc 221, and the other right-angled side of the limiting stud 224 is connected to the first plane 3421 of the shaft ring 30.

[0146] In some embodiments, the fan 22 is provided with a second reinforcing rib 225. The second reinforcing rib 225 is connected to the outer circumferential side of the shaft ring 30 in a radial manner, and the second reinforcing rib 225 is connected to the middle disc 221. The second reinforcing rib 225 can increase the structural strength of the fan 22.

[0147] The second reinforcing rib 225 is in the shape of a substantially triangular plate, and one of the sides of the second reinforcing rib 225 in the shape of a triangle is connected to the middle disc 221, and the other side of the second reinforcing rib 225 in the shape of a triangle is connected to the outer circumferential side of the shaft ring 30.

[0148] The first reinforcing rib 381 and the second reinforcing rib 225 are located on different diameter lines of the shaft ring 30, and the first reinforcing rib 381 and the second reinforcing rib 225 are distributed in the circumferential direction, which can increase the structural strength of the shaft ring 30 as much as possible.

[0149] In some embodiments, referring to Figure 7 , the platform portion 41 includes a platform body portion 416. The extension 411 extends from the end face of the platform body portion 416 in a direction away from the connecting portion 43.

[0150] The connection between the platform body portion 416 and the extension 411 forms a stepped face 417. In the assembled state, the stepped face 417 abuts against the end face of the limiting stud 224 away from the middle disc 221, i.e., the stepped face 417 abuts against the rear end face of the limiting stud 224.

[0151] In some embodiments, referring to Figure 9 and Figure 11 , the length of the limiting stud 224 in the axial direction of the fan 22 is Lb3, the length of the extension 411 in the axial direction of the fan 22 is La3, and Lb3 and La3 satisfy the following relationship: Lb3≥La3. Within this range of conditions, the stepped face 417 on the fixing member 40 can be guaranteed to abut against the limiting stud 224, thereby achieving the positioning of the fixing member 40 and the fan 22 in the axial direction.

[0152] In some embodiments, the length of the inner wall of the connecting portion 43 to the free end of the claw 42 is La4, and La3≥La4. Within this size relationship, the problem of the claw 42 being too long and increasing the cost can be avoided; in addition, when the claw 42 is longer, the contact area of the claw 42 with the collar 30 is larger, which increases the difficulty of installing the fixing member 40 to the collar 30 when Lb1=La1.

[0153] In some embodiments, the distance from the rear end of the collar 30 to the edge of the avoiding portion 30b is Lb4, and the distance from the inner wall (front wall) of the connecting portion 43 to the edge of the mounting hole 410 is La5. Lb4<La5, which can ensure that the mounting hole 410 on the fixing member 40 can be aligned with the avoiding portion 30b on the collar 30.

[0154] If Lb4≥La5, then there will be a phenomenon that the connecting portion 43 is aligned with the rear end of the collar 30, but the mounting hole 410 is misaligned with the avoiding portion 30b.

[0155] In some embodiments, the connecting portion 43 is connected to the end of the platform portion 41 and the claw 42.

[0156] In some embodiments, the claw 42 has two spaced apart. The space between the two claws 42 is for the driving shaft 230 to pass through.

[0157] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

[0158] In order to facilitate explanation, the above description has been made in combination with specific embodiments. However, the above exemplary discussion is not intended to exhaust or limit the embodiments to the specific forms disclosed above. Various modifications and variations can be derived according to the above teachings. The selection and description of the above embodiments are to better explain the principles and practical applications, so that those skilled in the art can better use the embodiments and various different modified embodiments suitable for specific use considerations.

Claims

1. A fan assembly comprising: The application relates to a fan assembly. The fan assembly comprises a motor connected with a driving shaft, a fan, and a shell. The fan comprises a shaft ring extending along the axial direction of the fan, and the shaft ring is provided with a through portion for the driving shaft to pass through and an avoiding portion on the side wall of the shaft ring, the avoiding portion being communicated with the through portion. The fan further comprises a fixing member clamped on the side wall of the shaft ring and a fastener screwed on the fixing member and passing through the avoiding portion, the end of the fastener abutting against the driving shaft to tightly press the driving shaft. The shaft ring is provided with a recess formed by the inward recess of the end face of the shaft ring. The fixing member comprises a platform portion arranged on the outer side of the shaft ring, a clamping jaw arranged on the platform portion and inserted into the recess, and a connecting portion connected between the platform portion and the clamping jaw. The fan further comprises a middle disc and a limiting vertical rib, the shaft ring is connected to the middle portion of the middle disc and protrudes from the middle disc along the axial direction, the limiting vertical rib is arranged in pairs, and the limiting vertical rib is connected to the outer periphery of the shaft ring and the middle disc. The platform portion is inserted between the two limiting vertical ribs.

2. The fan assembly of claim 1, wherein, The two limiting vertical ribs are a first limiting vertical rib and a second limiting vertical rib, and the part of the platform portion located between the two limiting vertical ribs is an extension portion. The extension portion is provided with a first positioning plane facing the first limiting vertical rib, a second positioning plane facing the second limiting vertical rib, a first inclined surface connected to one end of the first positioning plane away from the connecting portion, and a second inclined surface connected to one end of the second positioning plane away from the connecting portion. The platform portion comprises a platform body portion and an extension portion extending from the platform body portion away from the connecting portion, the extension portion is located between the two limiting vertical ribs, and a step surface is formed at the connection between the extension portion and the platform body portion. The outer peripheral surface of the shaft ring comprises a first plane abutting against the platform portion, and the side surface of the recess close to the first plane is a second plane abutting against the clamping jaw. The second plane is provided with a protrusion, the distance from the protrusion to the first plane is Lb1, the distance between the platform portion and the clamping jaw is La1, and Lb1<=La1<=Lb1+4mm.

3. The fan assembly of claim 2, wherein, The shaft ring comprises an outer ring portion comprising circular arc segments and flat plate segments connected with each other, and an inner ring portion arranged in the outer ring portion, the inner portion of the inner ring portion forms the through portion, and the space between the inner ring portion and the outer ring portion forms the recess. The platform portion is arranged on the outer side of the flat plate segment, and the clamping jaw is arranged on the inner side of the flat plate segment. The fan assembly is a centrifugal fan.

4. The fan assembly of claim 3, wherein, The fan assembly comprises a shell provided with an air inlet and an air outlet, a heat exchanger arranged in the shell and used for exchanging heat with air passing through the heat exchanger, and a fan assembly. ​ ​ ​ ​ ​ 5. The fan assembly of claim 3, wherein, ​ ​ ​ ​ 6. The fan assembly of claim 2, wherein, ​ 7. The fan assembly of claim 6, wherein, ​ 8. The fan assembly of claim 2, wherein, ​ ​ ​ ​ 9. The fan assembly of any of claims 1-8, wherein, ​ 10. A ducted fan machine characterised in that, ​ ​ ​ The fan assembly of any one of claims 1-9, for driving air to flow from the air inlet to the heat exchanger, and then to be blown out from the air outlet.

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