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 motor is connected with a driving shaft; the fan comprises a shaft ring, the shaft ring extends in the axial direction of the fan, and a penetrating part is arranged on the shaft ring and used for allowing the driving shaft to penetrate through; the fixing piece is connected to the side wall of the shaft ring, and the fixing piece comprises a first connecting part and a second connecting part; the second connecting part is connected to the end, close to the driving shaft, of the first connecting part, and a step shape is formed at the joint of the second connecting part and the first connecting part; the mounting hole penetrates through the first connecting part and the second connecting part, and the mounting hole is communicated with the penetrating part; and the fastening piece is connected to the mounting hole in a threaded mode, and the end of the fastening piece abuts 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, and 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 a motor output shaft or a transmission shaft. This kind of structure form has the problems of complex shaft sleeve structure, more material, and high cost. CONTENT OF THE UTILITY MODEL

[0003] The present application aims to at least solve 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 includes: a motor, a fan, a fixing member, and a fastener; the motor is connected with a driving shaft of the fan, and includes a shaft ring extending in the axial direction of the fan, the shaft ring is provided with a through portion for the driving shaft to pass through;

[0005] The fixing member is connected to the side wall of the shaft ring, and the fixing member includes: a first connecting portion; a second connecting portion connected to one end of the first connecting portion close to the driving shaft, the connection between the second connecting portion and the first connecting portion forms a stepped shape; and a mounting hole penetrating the first connecting portion and the second connecting portion, the mounting hole being in communication with the through portion;

[0006] The fastener is screwed in the mounting hole, and the end of the fastener abuts against the driving shaft to tightly press the driving shaft.

[0007] In the present application, a fixing member is provided for connecting with the fan, and then the driving shaft is tightly pressed by screwing the fixing member with 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.

[0008] By setting the fixing member in a stepped shape, the installation and positioning of the fixing member on the shaft ring can be realized, and then the fixing member can be connected with the shaft ring by adhesion or the like, thereby avoiding the difficulty in placing the nut in the mold when the nut is inlaid in the fan in the prior art.

[0009] In some embodiments, the first connecting portion is located within the outer contour of the second connecting portion in the plane perpendicular to the axis of the fixing member.

[0010] In the present application, by setting the outer contour of the second connecting portion to be larger than that of the first connecting portion, the second connecting portion abuts against the shaft ring, which can avoid the fixing member from being outwardly detached from the shaft ring when the fastener is installed.

[0011] In some embodiments, the shaft ring is provided with a mounting cavity, which is formed by axially recessing an end surface of the shaft ring inwardly;

[0012] The side wall of the shaft ring, which is away from the through portion and surrounds the mounting cavity, is a mounting wall, the mounting wall is provided with a fixing hole, the first connecting portion is connected in the fixing hole, and the second connecting portion is located in the mounting cavity.

[0013] In the application, the mounting cavity is arranged on the shaft ring, and the fixing member can be loaded into the shaft ring from the mounting cavity, thereby facilitating the installation of the fixing member.

[0014] In some embodiments, the shaft ring comprises: an outer ring portion, which has a mounting wall provided with a fixing hole; an inner ring portion, which is located inside the outer ring portion, and a space between the inner ring portion and the outer ring portion forms a recess; the first connecting portion is connected in the fixing hole, and the second connecting portion is located in the recess.

[0015] In the application, the fixing member can be loaded into the shaft ring through the recess between the outer ring portion and the inner ring portion, thereby facilitating the installation of the fixing member.

[0016] In some embodiments, the mounting wall is in the form of a flat plate.

[0017] In some embodiments, the fixing hole is non-circular in profile in a direction perpendicular to the axis thereof, and the shape of the first connecting portion is adapted to the fixing hole.

[0018] In the application, the first connecting portion cooperates with the non-circular fixing hole to prevent rotation, thereby avoiding rotation of the fixing member in the fixing hole during tightening of the fastener.

[0019] In some embodiments, the length of the first connecting portion located in the fixing hole is H1, and H1≥1.5 mm.

[0020] In the application, by setting the length of the cooperation between the first connecting portion and the fixing hole, the connection firmness of the fixing member in the shaft ring can be ensured, and the fixing member can be prevented from loosening from the shaft ring.

[0021] In some embodiments, the inner ring portion is provided with a notch, and the notch communicates the through portion with the recess.

[0022] In the application, the fixing member can be installed on the shaft ring from the notch, thereby facilitating the installation of the fixing member.

[0023] In some embodiments, the shaft ring comprises: a blocking rib, one end of which is connected to the edge of the notch, and the other end of which is connected to the mounting wall.

[0024] In the application, the blocking rib can increase the structural strength of the shaft ring.

[0025] In some embodiments, along the axial direction of the fan, the through portion can be divided into a first through portion and a second through portion, the second through portion being a portion of the through portion on which no notch is arranged, the axial length of the second through portion being L1, L1≥5mm.

[0026] In the present application, by setting the length of the second through portion, the connection stability between the drive shaft and the collar can be ensured, and the shaking of the fan relative to the drive shaft can be avoided.

[0027] In another aspect of the present application, a ducted air conditioner is provided, comprising a housing, an inlet and an outlet arranged on the housing, a heat exchanger arranged in the housing and used for exchanging heat with air passing therethrough, and a fan assembly as described above, used for driving air to flow from the inlet to the heat exchanger and then to be blown out of the outlet. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 A schematic view of a ducted air conditioner according to some embodiments is shown;

[0029] Figure 2 A sectional view of a ducted air conditioner according to some embodiments is shown;

[0030] Figure 3 A sectional view of a ducted air conditioner according to some embodiments is shown;

[0031] Figure 4 A sectional view of a fan and a drive shaft in a fan assembly according to some embodiments is shown;

[0032] Figure 5 A sectional view of a fan and a drive shaft in a fan assembly according to some embodiments is shown; Figure 4 A sectional view of a fan and a drive shaft in a fan assembly according to some embodiments is shown;

[0033] Figure 6 A sectional view of a fan and a drive shaft in a fan assembly according to some embodiments is shown;

[0034] Figure 7 A sectional view of a fan and a drive shaft in a fan assembly according to some embodiments is shown; Figure 6 A sectional view of a fan and a drive shaft in a fan assembly according to some embodiments is shown;

[0035] Figure 8 A schematic view of a fan in a fan assembly according to some embodiments is shown;

[0036] Figure 9 A schematic view of a fan in a fan assembly according to some embodiments is shown;

[0037] Figure 10 A schematic view of a fixing member in a fan assembly according to some embodiments is shown;

[0038] Figure 11 A sectional view of a fan and a fixing member in a fan assembly according to some embodiments is shown;

[0039] Figure 12 and Figure 13 A partial side view of a fan in a fan assembly is shown according to some embodiments;

[0040] Figure 14 A side view of a fixing member in a fan assembly is shown according to some embodiments.

[0041] 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 part; 22, fan; 221, middle disc; 222, blade; 2221, through hole; 225, second reinforcing rib; 23, motor; 230, driving shaft; 231, output shaft; 232, transmission shaft; 25, fastening screw; 30, collar; 30a, through part; 30c, recess; 31, mounting cavity; 32, mounting wall; 321, fixing hole; 322, stop surface; 34, outer ring part; 341, circular arc segment; 35, inner ring part; 351, notch; 381, first reinforcing rib; 384, stop rib; 40, fixing member; 410, mounting hole; 47, first connecting part; 48, second connecting part; 50, heat exchanger. DETAILED DESCRIPTION

[0042] For the purpose of clarity and a thorough understanding of the application, the application will be described in greater detail with reference to the drawings, wherein the same or similar components are generally designated with the same reference numerals. It is to be understood that the application is not limited in its application to the details of the construction and the arrangement of the components set forth in the description or illustrated in the drawings. The application is capable of other embodiments and of being practiced or being carried out in various ways.

[0043] In the description of the application, it should 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 purpose of facilitating the description of the application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application.

[0044] The terms "first", "second", "third", etc., are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second", etc., can explicitly or implicitly include one or more of the features. In the description of the application, unless otherwise stated, "a plurality of" means two or more.

[0045] In the description of the present application, it is necessary to point out that unless explicitly defined and limited, the terms "mount", "connect", "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or 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.

[0046] The air conditioner performs a 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.

[0047] 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.

[0048] 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 heat-exchanging with a material to be cooled using latent heat of evaporation of the refrigerant. Throughout the cycle, the air conditioner can adjust the temperature of the indoor space.

[0049] 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.

[0050] The indoor heat exchanger and the outdoor heat exchanger are used as a condenser or an evaporator. When the indoor heat exchanger is used as a condenser, the air conditioner is used as a heater in a heating mode, and when the indoor heat exchanger is used as an evaporator, the air conditioner is used as a cooler in a cooling mode.

[0051] The ducted-type air conditioner according to the present application belongs to one kind of air conditioners.

[0052] Referring to Figures 1 to 3 The ducted-type air conditioner according to the present application includes a housing 10.

[0053] The housing 10 is generally in the shape of a rectangular parallelepiped, forming the 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 a side plate connected between the bottom plate 11 and the top plate 12.

[0054] The side plate of the casing 10 is provided with an air supply port 10a. The side of the casing 10 opposite to the air supply port 10a is provided with an air inlet port 10b, or the bottom plate 11 of the casing 10 is provided with the air inlet port 10b away from the air supply port 10a.

[0055] The indoor air enters the casing 10 through the air inlet port 10b and returns to the indoor space through the air supply port 10a.

[0056] The casing 10 is provided with a partition plate 13. The partition plate 13 divides the space in the casing 10 into two cavities, one of which is an air inlet cavity 141 and the other of which is an air outlet cavity 142.

[0057] The air inlet port 10b is in communication with the air inlet cavity 141, and the air supply port 10a is in communication with the air outlet cavity 142.

[0058] The ducted-type air conditioner comprises a fan assembly 20. The fan assembly 20 can be arranged in the air inlet cavity 141.

[0059] The fan assembly 20 can be a centrifugal fan, which comprises a volute 21. The volute 21 is provided with an air suction port 21a on each side perpendicular to the axis.

[0060] The volute 21 is provided with an air outlet portion 211, and the end of the air outlet portion 211 is formed with an air outlet port 21b. The air outlet portion 211 is a portion extending outwardly from the cylindrical portion of the volute 21.

[0061] The air outlet portion 211 of the volute 21 penetrates the partition plate 13, or the air outlet port 21b of the volute 21 is opposite to an opening in the partition plate 13, so that the air outlet port 21b of the volute 21 is in communication with the air outlet cavity 142.

[0062] The fan assembly 20 comprises a fan 22. The fan 22 is arranged in the volute 21. Specifically, the fan 22 can be arranged in the cylindrical portion of the volute 21.

[0063] The fan assembly 20 can comprise 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.

[0064] 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 port 10b, then flows into the volute 21 through the air suction port 21a, continues to be blown to the air outlet cavity 142 through the air outlet port 21b of the volute 21, and finally is sent to the indoor space through the air supply port 10a.

[0065] The ducted-type air conditioner comprises 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, and is used to exchange heat with the air passing therethrough.

[0066] The air flow generated by the fan 22 flows to the heat exchanger 50 through the 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.

[0067] In some embodiments, referring to Figure 1 , the fan assembly 20 includes two fans 22. The two fans 22 can be arranged at intervals along the length direction of the partition plate 13.

[0068] 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 each of the two driving shafts 230 is connected to one fan 22 to drive the fan 22 to rotate.

[0069] In some embodiments, referring to Figure 3 , the fan assembly 20 includes three fans 22. The three fans 22 can be arranged at intervals along the length direction of the partition plate 13.

[0070] 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.

[0071] 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 to one fan 22.

[0072] The output shaft 231 of the second side of the motor 23 can be connected to the transmission shaft 232 through the shaft coupling 26 to extend the output shaft 231, and the output shaft 231 and the transmission shaft 232 of this side are driving shafts 230. The driving shafts 230 are connected to the two fans 22 of this side.

[0073] The application improves the connection structure of the driving shaft 230 and the fan 22:

[0074] In some embodiments, referring to Figures 4 to 9 , the fan 22 includes a center disc 221. The outer periphery of the center disc 221 can be circular.

[0075] The fan 22 can include blades 222. The blades 222 are connected to the center disc 221. A plurality of blades 222 can be arranged along the circumferential direction of the center disc 221.

[0076] The fan 22 includes a shaft ring 30 for connecting with the driving shaft 230. The shaft ring 30 is located at the center of the fan 22. The shaft ring 30 extends in the axial direction of the fan 22.

[0077] In some embodiments, the shaft ring 30 is connected to the middle part of the center disc 221. The shaft ring 30 protrudes in the axial direction from the center disc 221.

[0078] In some embodiments, the shaft ring 30 is provided with a through portion 30a penetrating in the axial direction, for the driving shaft 230 to pass through.

[0079] During assembly, the shaft ring 30 of the fan 22 can be sleeved on the driving shaft 230.

[0080] In some embodiments, the axial end of the shaft ring 30 can be provided with an internal chamfer, which has a guiding effect on the passing of the fan 22 to the driving shaft 230, and can improve the efficiency of the installation of the fan 22 to the driving shaft 230.

[0081] In some embodiments, referring to Figure 5 and Figure 6 , the fan assembly 20 can include a fixing member 40. The fixing member 40 is connected with the shaft ring 30.

[0082] The fasteners such as screws or bolts are radially screwed from 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 moving relative to the fan 22.

[0083] In the present application, by providing a fixing member 40 connected with the fan 22, and then abutting the driving shaft 230 against the fixing member 40 by screwing the fasteners, the driving shaft 230 can drive the fan 22 to rotate. Compared with the structure of the prior art in which the fan 22 is connected with the driving shaft 230 by a shaft sleeve, the connection structure of the present application is simpler and has lower cost.

[0084] 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.

[0085] In some embodiments, the fixing member 40 is connected to the side wall of the shaft ring 30. The fixing member 40 is provided with a threaded mounting hole 410. The fastening screw 25 is screwed into the mounting hole 410 of the fixing member 40.

[0086] In some embodiments, referring to Figure 5 , the fixing member 40 includes a first connecting portion 47 and a second connecting portion 48. The first connecting portion 47 is connected to one end of the second connecting portion 48 away from the driving shaft 230. The second connecting portion 48 is connected to one end of the first connecting portion 47 close to the driving shaft 230. The connection between the first connecting portion 47 and the second connecting portion 48 forms a stepped shape. The mounting hole 410 penetrates the first connecting portion 47 and the second connecting portion 48.

[0087] In some embodiments, in the projection on the plane perpendicular to the axis of the fixing member 40, the second connecting portion 48 is located within the outer contour line of the first connecting portion 47.

[0088] The side wall of the collar 30 is provided with a stepped fixing hole 321. The fixing member 40 is connected in the fixing hole 321. The fixing member 40 can be installed in the fixing hole 321 by means of adhesion.

[0089] In the present application, by setting the fixing member 40 in a stepped shape, the installation and positioning of the fixing member 40 on the collar 30 can be realized, and then the fixing member 40 can be connected with the collar 30 by means of adhesion, thereby avoiding the problem of difficulty in placing the nut in the mold in the prior art when embedding the nut in the fan.

[0090] In some embodiments, with reference to Figures 6 to 11 In the plane perpendicular to the axis of the fixing member 40, the first connecting part 47 is located in the outer contour line of the second connecting part 48, and the outer contour line of the second connecting part 48 is located outside the first connecting part 47.

[0091] In the process of screwing the fastening screw 25 into the mounting hole 410, the fixing member 40 will be subjected to a force away from the direction of the driving shaft 230. In the present application, by setting the outer contour of the second connecting part 48 to be larger, due to the stop action of the stepped surface at the connection between the first connecting part 47 and the second connecting part 48 abutting against the collar 30, the fixing member 40 can be prevented from coming out of the collar 30.

[0092] In some embodiments, the fixing hole 321 on the collar 30 is in communication with the through portion 30a, and the fixing member 40 can be installed from the through portion 30a into the fixing hole 321.

[0093] In some embodiments, with reference to Figure 9 and Figure 12 The collar 30 is provided with a mounting cavity 31 formed by the inward recess of the end face of the collar 30 along the axis.

[0094] The side wall of the collar 30 surrounding the mounting cavity 31 is the mounting wall 32, which is away from the through portion 30a. The mounting wall 32 is provided with a through fixing hole 321 in communication with the mounting cavity 31. The fixing member 40 is installed from the mounting cavity 31 to the fixing hole 321.

[0095] For the convenience of description, it is defined that the fastening screw 25 is installed into the fixing member 40 from top to bottom. Then the lower end of the mounting cavity 31 is in communication with the through portion 30a, and the lower end of the fixing hole 321 is in communication with the mounting cavity 31.

[0096] The first connecting part 47 is installed in the fixing hole 321, and the second connecting part 48 is located in the mounting cavity 31.

[0097] Due to the blocking action of the mounting wall 32 on the second connecting part 48, the fixing member 40 can be limited to come out of the collar 30 upwardly.

[0098] Specifically, the second connecting portion 48 is connected to the lower end of the first connecting portion 47. The upper side of the second connecting portion 48 abuts against the lower side of the mounting wall 32.

[0099] In some embodiments, with reference to Figure 9 , the side of the mounting wall 32 that encloses the mounting cavity 31 is a stop surface 322. When the stop surface 322 is a flat surface, the thickness of the mounting wall 32 can be increased, the axial length of the fixing hole 321 can be increased, and thus the fitting area of the first connecting portion 47 and the fixing hole 321 can be increased, thereby improving the connection stability of the fixing member 40 on the mounting wall 32.

[0100] In some embodiments, the outer side of the mounting wall 32 is a flat surface, which is conducive to positioning and machining of the fixing hole 321.

[0101] In some embodiments, in the assembled state, the axis of the mounting hole 410 of the fixing member 40 is perpendicular to the axis of the shaft ring 30.

[0102] The axis of the mounting hole 410 intersects the axis of the shaft ring 30, so that the fastening screw 25 can press the drive shaft 230 from the radial direction after being installed in the mounting hole 410.

[0103] In some embodiments, the fixing member 40 can be connected to the fixing hole 32 by adhesion.

[0104] In some embodiments, with reference to Figure 9 and Figure 10 , the profile of the fixing hole 321 in the direction perpendicular to the axis of the fixing hole 321 is non-circular. The shape of the first connecting portion 47 corresponds to the shape of the fixing hole 321, so that the fixing member 40 is prevented from rotating relative to the fixing hole 321 when the fastening screw 25 is tightened.

[0105] The cross section of the first connecting portion 47 can be polygonal, and the fixing hole 321 is polygonal, for example, the cross section of the first connecting portion 47 can be quadrangular or hexagonal. At this time, the cross section refers to the cross section of the first connecting portion 47 in the plane perpendicular to the axis of the fixing member 40.

[0106] In some embodiments, the shape of the second connecting portion 48 is not limited, and can be cylindrical, which is relatively easy to process. In addition, when the fixing member 40 is installed, the direction of the second connecting portion 48 needs to be adjusted so that the first connecting portion 47 can be aligned with the fixing hole 321. Therefore, the second connecting portion 48 is provided in a cylindrical shape, and the first connecting portion 47 can be aligned and installed into the fixing hole 321 by rotating the second connecting portion 48.

[0107] In some embodiments, with reference to Figure 9 and Figure 12The shaft collar 30 comprises an outer ring portion 34. The outer ring portion 34 forms the outer shape of the shaft collar 30. The outer ring portion 34 can be formed by a circular arc segment 341 connected to the mounting wall 32 at both ends.

[0108] The circular arc segment 341 is a convex arc. The inner side surface and the outer side surface of the mounting wall 32 are flat surfaces. The mounting wall 32 is connected to both ends of the circular arc segment 341 to form a closed shape.

[0109] In some embodiments, the shaft collar 30 comprises 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.

[0110] The inner ring portion 35 forms a through portion 30a. 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 of the drive shaft 230 into the inner ring portion 35.

[0111] The space between the inner ring portion 35 and the outer ring portion 34 forms a recess 30c. The second connecting portion 48 can be located in the recess 30c.

[0112] In some embodiments, the inner ring portion 35 is provided with a notch 351. The notch 351 connects the through portion 30a and the recess 30c.

[0113] The portion of the recess 30c between the notch 351 and the mounting wall 32 forms a mounting cavity 31 with the notch 351.

[0114] In some embodiments, the shaft collar 30 is provided with a stop rib 384. The stop rib 384 is connected between the mounting wall 32 and the inner ring portion 35.

[0115] The stop rib 384 has two ribs spaced apart. The two stop ribs 384 and the mounting wall 32 form the mounting cavity 31.

[0116] In addition to the function of forming the mounting cavity 31, the stop rib 384 can also increase the structural strength of the shaft collar 30.

[0117] In some embodiments, one end of the stop rib 384 is connected to the edge of the notch 351, and the other end of the stop rib 384 is connected to the mounting wall 32.

[0118] In some embodiments, the stop rib 384 is connected perpendicularly to the mounting wall 32.

[0119] In some embodiments, the stop rib 384 is tangentially connected to the arc surface of the inner ring portion 35.

[0120] In some embodiments, the shaft collar 30 can be provided with a first reinforcing rib 381 to increase the structural strength of the shaft collar 30. The first reinforcing rib 381 is connected between the outer ring portion 34 and the inner ring portion 35.

[0121] The plurality of first reinforcing ribs 381 are distributed radially in the recess 30c.

[0122] 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 collar 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.

[0123] The second reinforcing rib 225 is substantially in the shape of a triangular plate. One side of the triangular shape of the second reinforcing rib 225 is connected to the middle disc 221, and the other side of the triangular shape of the second reinforcing rib 225 is connected to the outer circumferential side of the collar 30.

[0124] The first reinforcing rib 381 and the second reinforcing rib 225 are located at different diameters, so that 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 collar as much as possible.

[0125] In some embodiments, the second reinforcing rib 225 connected to the mounting wall 32 can be perpendicular to the mounting wall 32.

[0126] In some embodiments, with reference to Figure 11 , along the axial direction of the fan 22, the through portion 30a can be divided into a first through portion and a second through portion. The first through portion is the portion of the through portion 30a having the notch 351. The second through portion is the portion of the through portion 30a having a complete circular shape, and the second through portion is the portion of the through portion 30a that is not provided with the notch 351.

[0127] The axial length of the second through portion is L1, and L1≥5mm, which can ensure the stability of the connection of the fan 22 to the drive shaft 230.

[0128] If L1<5mm, the axial matching length of the second through portion and the drive shaft 230 is relatively short, and the fan 22 is likely to shake.

[0129] In some embodiments, along the axial direction of the fixing member 40, the length of the first connecting portion 47 located in the fixing hole 321 is H1, and H1≥1.5mm, which can ensure the structural strength of the mounting wall 32 and avoid the problem of stress fracture of this part.

[0130] In addition, H1 is the connecting length of the first connecting portion 47 and the collar 30. If H1<1.5mm, the connecting length is relatively short, which can greatly affect the connection reliability and stability of the fixing member 40 on the collar 30. Therefore, by setting H1≥1.5mm, the reliable connection of the fixing member 40 on the collar 30 can be ensured.

[0131] In some embodiments, the diameter of the through portion 30a is D1, the distance from the axis of the through portion 30a to the fixing member 40 is L2, and L2>(1 / 2)*D1, so that the second connecting portion 48 will not interfere with the driving shaft 230 in the assembled state.

[0132] In some embodiments, with reference to Figure 13 and Figure 14 , the circle in which the through portion 30a is located in the plane perpendicular to the axis of the collar 30 is Lp.

[0133] The distance from the mounting wall 32 to Lp is L3, and the maximum thickness of the second connecting portion 48 is L4. L3>L4, so that the second connecting portion 48 will not interfere with the driving shaft 230 in the assembled state.

[0134] In some embodiments, with reference to Figure 4 , Figure 6 and Figure 8 , the vane 222 can be provided with a through hole 2221. The through hole 2221 corresponds to the avoiding portion 30b on the collar 30. The through hole 2221 is coaxial with the avoiding portion 30b on the collar 30.

[0135] In assembly, the operator can insert a screwdriver or the like tool from the through hole 2221 to the collar 30 to tighten the fixing screw 25. Therefore, the provision of the through hole 2221 on the vane 222 can facilitate the assembly and maintenance operation, and improve the assembly efficiency.

[0136] In some embodiments, the diameter of the through hole 2221 is D2, and D2≥5mm, which is conducive to the screwdriver or the like tool passing through the through hole 2221.

[0137] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they 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.

[0138] 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 fan assembly comprises: a motor connected with a driving shaft; a fan comprising a collar extending along an axial direction of the fan, the collar being provided with a through portion for the driving shaft to pass through; a fixing member connected to a side wall of the collar, the fixing member comprising: a first connecting portion; a second connecting portion connected to one end of the first connecting portion close to the driving shaft, the second connecting portion being formed in a stepped shape at a connection position with the first connecting portion; a mounting hole penetrating through the first connecting portion and the second connecting portion, the mounting hole being in communication with the through portion; a fastener screwed into the mounting hole, an end of the fastener abutting against the driving shaft to press the driving shaft.

2. The fan assembly of claim 1, wherein, In a plane perpendicular to an axis of the fixing member, the first connecting portion is located within an outer contour of the second connecting portion.

3. The fan assembly of claim 2, wherein, The collar is provided with a mounting cavity formed by an end surface of the collar being recessed inwardly along an axial direction; a side wall of the collar surrounding the mounting cavity and away from the through portion is a mounting wall, the mounting wall being provided with a fixing hole, the first connecting portion being connected into the fixing hole, and the second connecting portion being located in the mounting cavity.

4. The fan assembly of claim 2, wherein, The collar comprises: an outer ring portion having a mounting wall provided with a fixing hole; an inner ring portion located inside the outer ring portion, a space between the inner ring portion and the outer ring portion forming a recess; the first connecting portion being connected into the fixing hole, and the second connecting portion being located in the recess.

5. A fan assembly according to claim 3 or 4, wherein, The fixing hole is non-circular in an outline perpendicular to an axis direction of the fixing hole, and the first connecting portion is shaped to fit the fixing hole.

6. The fan assembly of claim 4, wherein, The inner ring portion is provided with a notch, the notch being in communication between the through portion and the recess.

7. The fan assembly of claim 6, wherein, The collar comprises: a blocking rib having one end connected to an edge of the notch and the other end connected to the mounting wall.

8. The fan assembly of claim 6, wherein, In the axial direction of the fan, the through portion can be divided into a first through portion and a second through portion, the second through portion being a portion of the through portion on which the notch is not provided, and an axial length of the second through portion being L1, L1≥5mm.

9. The fan assembly of claim 1, 2, 3, 4, 6, 7, or 8, wherein, The fan assembly is a centrifugal fan.

10. A ducted fan machine characterised in that, The fan assembly comprises: a housing provided with an air inlet and an air outlet; a heat exchanger arranged in the housing for exchanging heat with air passing therethrough; the fan assembly according to 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 of the air outlet.

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