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, 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 a driving shaft connected with the motor to penetrate through. The avoiding part is arranged on the side wall of the shaft ring; the fixing piece is connected to the shaft ring, and the fixing piece comprises an end plate which is arranged on the driving shaft in a sleeving mode; the platform part is connected with the end plate, and the platform part corresponds to the avoiding part and is inserted into the shaft ring so as to limit the fixing piece to rotate relative to the shaft ring; and the fastening piece is connected to the platform part 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 air conditioning technical field, especially 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 middle disc; a plurality of blades connected to the outer peripheral side of the middle disc, a shaft ring connected to the middle part of the middle disc and extending along the axial direction of the fan, the shaft ring is provided with: a through portion for the driving shaft to pass through; a avoiding portion provided on the side wall of the shaft ring, the avoiding portion is in communication with the through portion;

[0006] The fixing member is connected to the shaft ring, and the fixing member includes: an end plate sleeved on the driving shaft; a platform portion connected with the end plate, the platform portion is inserted into the shaft ring to limit the rotation of the fixing member relative to the shaft ring;

[0007] The fastener is screwed on 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 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 shaft ring is provided with a mounting groove recessed inward from the end face of the shaft ring; the avoiding portion is in communication with the mounting groove, and the platform portion is adapted to the mounting groove.

[0010] In the present application, the fixing member and the shaft ring of the fan are limited by the cooperation of the platform portion and the mounting groove, so as to ensure that the fixing member does not move relative to the fan.

[0011] In some embodiments, the shaft ring comprises: an outer ring part comprising mutually connected circular arc segments and flat plate segments, the flat plate segments being provided with mounting grooves; an inner ring part arranged in the outer ring part, an inner part of the inner ring part forming a through part, and a space between the inner ring part and the outer ring part forming a recess; and a limiting rib part connected to the recess.

[0012] The fixing member further comprises a limiting part connected to the end plate, the limiting part being inserted into the recess and abutting against a side of the limiting rib part away from the mounting groove.

[0013] In the present application, by arranging the limiting part on the fixing member and abutting the limiting part against the limiting rib part on the shaft ring, the movement of the fixing member away from the driving shaft is blocked.

[0014] In some embodiments, the outer periphery of the shaft ring is connected to the limiting rib part; and the fixing member further comprises a limiting part connected to the end plate, the limiting part abutting against the side of the limiting rib part away from the mounting groove.

[0015] In the present application, the limiting rib part (reinforcing rib) outside the shaft ring is used as the structure for cooperation between the fan and the fixing member, so that the structural design of the product is simplified.

[0016] In some embodiments, the outer periphery of the shaft ring is connected to the limiting rib part; and the fixing member further comprises a limiting part connected to the end plate, the limiting part being provided with a limiting groove, the limiting groove being inserted into the limiting rib part.

[0017] In the present application, by cooperating the limiting groove with the limiting rib part, not only the movement of the fixing member relative to the fan is limited, but also the rotation of the fixing member relative to the fan is limited.

[0018] In some embodiments, the side of the mounting groove away from the through part is open, the avoiding part is connected to the mounting groove and the through part, and the avoiding part is open on the side away from the middle disc, so that the fastener connected to the platform part can enter the shaft ring from the open side of the avoiding part during assembly.

[0019] In the present application, the fastener can be first connected to the fixing member and then installed on the shaft ring together with the fixing member, which facilitates the installation operation.

[0020] In some embodiments, the side of the shaft ring surrounding the mounting groove and close to the through part is a first plane, and the platform part abuts against the first plane.

[0021] In the present application, by arranging the platform part of the fixing member to abut against the first plane of the shaft ring, the contact area between the two parts is ensured to be relatively large, the reliability of the limiting is improved, and the platform part in the form of a flat plate is relatively easy to process.

[0022] In some embodiments, the distance from the side of the limiting rib part away from the mounting groove to the first plane is Lc1, the distance between the limiting part and the platform part is Ld1, and Ld1≤Lc1+1mm.

[0023] In the present application, when the fastener is pressed against the driving shaft, the driving shaft reacts on the fastener, giving the fastener an upward force, the fastener drives the fixing member to produce a slight movement away from the driving shaft, because Ld1≤Lc1+1mm, the limiting part can clamp the limiting rib part, limiting the movement of the fixing member, so as to ensure that the fastener can be tightly pressed against the driving shaft.

[0024] In some embodiments, the maximum distance from the first plane to the edge of the through portion is Lc3, and the maximum distance from the platform portion to the edge of the limiting hole is Ld3; Ld3≤Lc3+1mm.

[0025] In the present application, because Ld3≤Lc3+1mm, the circular side surface surrounding the limiting hole on the fixing member can be in abutment with the driving shaft, limiting the movement of the fixing member, so as to ensure that the fastener can be tightly pressed against the driving shaft.

[0026] In some embodiments, the blade is provided with an avoiding hole, which is opposite 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] Another aspect of the present application is a ducted-type air conditioner, which 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; 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 of the air outlet. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 A schematic view of a ducted-type air conditioner according to some embodiments is shown;

[0030] Figure 2 A sectional view of a ducted-type air conditioner according to some embodiments is shown;

[0031] Figure 3 A schematic view of a ducted-type air conditioner according to some embodiments is shown;

[0032] Figure 4 A sectional view of a fan assembly in a ducted-type air conditioner according to some embodiments is shown;

[0033] Figure 5 A Figure 4 enlarged view of C is shown;

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

[0035] Figure 7A partial schematic view of a fan in a fan assembly is shown, in accordance with some embodiments;

[0036] Figure 8 A partial rear view of a fan in a fan assembly is shown, in accordance with some embodiments;

[0037] Figure 9 A schematic view of a fixing in a fan assembly is shown, in accordance with some embodiments;

[0038] Figure 10 A schematic view of a fixing in a fan assembly, from another perspective, is shown, in accordance with some embodiments;

[0039] Figure 11 A cross-sectional view of a fixing in a fan assembly is shown, in accordance with some embodiments;

[0040] Figure 12 A top view of a fixing in a fan assembly is shown, in accordance with some embodiments;

[0041] Figure 13 A schematic view of a fan and a fixing in a fan assembly is shown, in accordance with further embodiments;

[0042] Figure 14 A partial schematic view of a fan in a fan assembly is shown, in accordance with further embodiments;

[0043] Figure 15 A schematic view of a fixing in a fan assembly is shown, in accordance with further embodiments;

[0044] Figure 16 A partial schematic view of a fan and a fixing in a fan assembly is shown, in accordance with yet further embodiments;

[0045] Figure 17 A schematic view of a drive shaft in a fan assembly is shown, in accordance with some embodiments.

[0046] 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; 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; 2331 is the anti-rotation plane; 25 is the fastening screw; 26 is the coupling; 30 is the collar; 30a is the through section. 30b, Clearance section; 30c, Recessed section; 34, Outer ring section; 341, Arc segment; 342, Flat plate segment; 3421, First plane; 35, Inner ring section; 36, Mounting groove; 361, First stop surface; 362, Second stop surface; 381, First reinforcing rib; 383, Limiting rib section; 3832, Protruding rib; 40, Fixing member; 41, Platform section; 410, Mounting hole; 412, First positioning plane; 413, Second positioning plane; 414, First inclined surface; 415, Second inclined surface; 44, End plate; 441, Limiting hole; 46, Limiting section; 461, Limiting groove; 50, Heat exchanger. Detailed Implementation

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] The compressor compresses 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.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] The ducted-type air conditioner according to the present application belongs to one of air conditioners.

[0057] Referring to Figures 1 to 3 The ducted-type air conditioner according to the present application includes a housing 10.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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. The air inlet port 10b communicates with the air inlet cavity 141, and the air supply port 10a communicates with the air outlet cavity 142.

[0062] The ducted-type air conditioner includes a fan assembly 20. The fan assembly 20 can be arranged in the air inlet cavity 141.

[0063] The fan assembly 20 can be a centrifugal fan including a volute 21. The volute 21 is provided with air suction ports 21a on two side surfaces perpendicular to the axis. 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.

[0064] 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 communicates with the air outlet cavity 142.

[0065] The fan assembly 20 includes 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.

[0066] The fan 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 connected with the fan 22 to drive the fan 22 to rotate.

[0067] 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.

[0068] 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 to exchange heat with the air passing therethrough.

[0069] 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.

[0070] 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.

[0071] 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.

[0072] In some embodiments, referring 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 direction of the partition plate 13.

[0073] 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.

[0074] 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.

[0075] 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.

[0076] The application improves the connection structure of the driving shaft 230 and the fan 22:

[0077] In some embodiments, referring to Figures 5 to 8 , the fan 22 includes a middle disc 221. The outer periphery of the middle disc 221 can be circular.

[0078] The fan 22 can include blades 222. The blades 222 are connected to the outer periphery side of the middle disc 221. A plurality of blades 222 can be arranged along the circumferential direction of the middle disc 221.

[0079] 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.

[0080] In some embodiments, the shaft ring 30 is connected to the middle part of the middle disc 221. The shaft ring 30 protrudes in the axial direction from the middle disc 221.

[0081] 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.

[0082] During assembly, the shaft ring 30 of the fan 22 can be sleeved on the driving shaft 230.

[0083] In some embodiments, referring to Figure 5 , Figure 9 and Figure 10 , the fan assembly 20 can include a fixing member 40. The fixing member 40 is connected with the shaft ring 30.

[0084] Fasteners such as screws or bolts are radially screwed to the fixing member 40 from the fan 22, and the end portions of the fasteners abut 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.

[0085] 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 in 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.

[0086] 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.

[0087] In some embodiments, the fixing member 40 is sleeved on the driving shaft 230 and is limited on the shaft ring 30.

[0088] In some embodiments, the fixing member 40 includes an end plate 44. The end plate 44 is provided with a limiting hole 441 penetrating therethrough, for the driving shaft 230 to pass through. The end plate 44 is connected to one end of the shaft ring 30 in the axial direction.

[0089] In some embodiments, the fixing member 40 includes a platform portion 41, for being connected with the fastening screw 25.

[0090] The platform portion 41 is connected with the end plate 44 at an angle. The platform portion 41 extends from the end plate 44 towards the direction close to the center disc 221.

[0091] The platform portion 41 is arranged at the outer periphery of the shaft ring 30. The fastening screw 25 is screwed to the platform portion 41, and then passes through the side wall of the shaft ring 30, so that the fastening screw 25 can abut against the driving shaft 230 from the radial direction.

[0092] 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.

[0093] In some embodiments, the platform portion 41 is screwed into the shaft ring 30 by a self-tapping screw, so that the platform portion 41 is formed with threads.

[0094] In some embodiments, the shaft ring 30 is provided with an avoiding portion 30b on the side wall thereof for avoiding the fastening screw 25. The platform portion 41 is connected to the shaft ring 30 corresponding to the avoiding portion 30b.

[0095] In some embodiments, continuing to refer to Figure 6 , the vane 222 is provided with an avoiding hole 2221. The avoiding hole 2221 corresponds to the avoiding portion 30b on the shaft ring 30.

[0096] The avoiding hole 2221 has a diameter D2, and D2≥5mm, which is beneficial for a tool such as a screwdriver to pass through the avoiding hole 2221.

[0097] During assembly, an operator can insert a tool such as a screwdriver into the avoiding hole 2221 to tighten the fastening screw 25. Therefore, the avoiding hole 2221 on the vane 222 can facilitate assembly and maintenance operations, and improve assembly efficiency.

[0098] In some embodiments, a limiting structure is arranged between the platform portion 41 and the shaft ring 30, so that the fixing member 40 can be limited on the shaft ring 30.

[0099] In some embodiments, the platform portion 41 is inserted into the shaft ring 30 to limit rotation of the fixing member 40 relative to the shaft ring 30.

[0100] In some embodiments, referring to Figure 7 and Figure 8 , the shaft ring 30 is provided with a mounting groove 36 at a position corresponding to the avoiding portion 30b. The platform portion 41 is inserted into the mounting groove 36 to realize mounting of the platform portion 41 on the shaft ring 30.

[0101] The mounting groove 36 can be formed by inwardly recessing an end face of the shaft ring 30 along an axis.

[0102] For convenience of description, it is defined that the end plate 44 is located at a rear side of the shaft ring 30, the fastening screw 25 is connected to the platform portion 41 from top to bottom, and a direction perpendicular to the top-bottom direction and the front-rear direction is a left-right direction. The mounting groove 36 is formed by recessing a rear end face of the shaft ring 30 forwardly.

[0103] In some embodiments, referring to Figure 7 and Figure 8 , the shaft ring 30 is provided with a first plane 3421 surrounding the mounting groove 36. The platform portion 41 abuts against the first plane 3421, specifically, a lower surface of the platform portion 41 abuts against the first plane 3421.

[0104] In some embodiments, the shaft ring 30 is provided with two stop faces surrounding the mounting groove 36.

[0105] The two stop faces are a first stop face 361 and a second stop face 362 respectively. The first stop face 361 and the second stop face 362 are oppositely arranged and connected to the left and right sides of the first plane 3421 respectively.

[0106] The platform part 41 is limited between the first stop face 361 and the second stop face 362.

[0107] In some embodiments, the mounting groove 36 is in the shape of a key groove. The side of the mounting groove 36 away from the through part 30a is open, that is, the upper side of the mounting groove 36 is open.

[0108] During assembly, the platform part 41 can be installed in the mounting groove 36 from top to bottom because the upper end of the mounting groove 36 is open.

[0109] The avoiding part 30b is connected between the mounting groove 36 and the through part 30a.

[0110] In some embodiments, the avoiding part 30b can be in the shape of a notch. The end of the avoiding part 30b away from the middle disc 221 is open.

[0111] During assembly, the fastening screw 25 can be installed on the fixing part 40 first. The platform part 41 can be installed in the mounting groove 36 from top to bottom because the upper end of the mounting groove 36 is open. The platform part 41 can be inserted into the mounting groove 36 from back to front because the rear end of the avoiding part 30b is open. That is, the fixing part 40 can drive the fastening screw 25 connected thereto to be loaded into the collar 30 from back to front.

[0112] In this application, the fastening screw 25 can be installed on the fixing part 40 first, and then the fixing part 40 is installed on the collar 30, which avoids the inconvenience of holding the fastening screw 25 to position it when the fixing part 40 is installed on the collar 30 first and then the fastening screw 25 is installed on the fixing part 40. This application is beneficial to the installation of the fastening screw 25 and improves the assembly efficiency.

[0113] In some embodiments, referring to Figure 9 and Figure 10 , the platform part 41 has opposite first and second positioning planes 412 and 413.

[0114] The arrangement direction of the first and second positioning planes 412 and 413 is the same as that of the two stop faces. The first positioning plane 412 faces the first stop face 361, and the second positioning plane 413 faces the second stop face 362.

[0115] The first positioning plane 412 is located on the left side, and the second positioning plane 413 is located on the right side. The first stop face 361 is located on the left side, and the second stop face 362 is located on the right side.

[0116] The first positioning plane 412 can limit the movement of the platform portion 41 to the left when it abuts against the first stop surface 361; the second positioning plane 413 can limit the movement of the platform portion 41 to the right when it abuts against the second stop surface 362.

[0117] In some embodiments, the platform portion 41 has a first inclined surface 414. The first inclined surface 414 is connected to the side of the first positioning plane 412 away from the end plate 44, i.e. the first inclined surface 414 is connected to the front side of the first positioning plane 412.

[0118] The platform portion 41 has a second inclined surface 415. The second inclined surface 415 is connected to the side of the second positioning plane 413 away from the end plate 44, i.e. the second inclined surface 415 is connected to the front side of the second positioning plane 412.

[0119] From back to front, the first inclined surface 414 and the second inclined surface 415 are inclined towards each other.

[0120] From back to front, the distance between the first inclined surface 414 and the second inclined surface 415 gradually decreases.

[0121] Due to the arrangement of the first inclined surface 414 and the second inclined surface 415, the platform portion 41 presents a shape of narrow front end and wide rear end. Due to the fact that the front end of the platform portion 41 has a smaller left-right direction size than the left-right direction size of the mounting groove 36, the platform portion 41 can be more smoothly inserted into the mounting groove 36.

[0122] In some embodiments, the fixing member 40 includes a limiting portion 46. The limiting portion 46 is connected to the end plate 44.

[0123] The limiting portion 46 can be connected to the end plate 44 perpendicularly. Both the limiting portion 46 and the platform portion 41 extend towards the middle disc 221 from the end plate 44.

[0124] The limiting rib portion 383 can be arranged inside the shaft ring 30 or outside the shaft ring 30. The limiting portion 46 abuts against the side of the limiting rib portion 383 away from the mounting groove 36.

[0125] When the fastening screw 25 is tightened to press the driving shaft 230 downwards, the driving shaft 230 gives the fastening screw 25 an upward reaction force, the fastening screw 25 drives the fixing member 40 to produce a slight movement away from the driving shaft 230, the fixing member 40 drives the limiting portion 46 to tightly clamp the limiting rib portion 383 by using its rigidity, and the radial rotation and axial movement of the fan 22 are all constrained, so that the fan 22 is effectively fixed on the driving shaft 230.

[0126] In some embodiments, at least part of the limiting portion 46 is located on a side of the plane Ln away from the platform portion 41, so that the platform portion 41 cooperates with the mounting groove 36 to limit the upper side of the fixing member 40, and the limiting portion 46 cooperates with the limiting rib portion 383 to limit the middle and lower side of the fixing member 40.

[0127] In some embodiments, referring to Figure 7 and Figure 8 , the limiting rib portion 383 is located inside the collar 30.

[0128] The collar 30 comprises an outer ring portion 34. The outer ring portion 34 forms the outer shape structure of the collar 30. The mounting groove 36 can be arranged on the outer ring portion 34.

[0129] The 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 inside of 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.

[0130] The space between the inner ring portion 35 and the outer ring portion 34 forms a recess 30c. The limiting rib portion 383 is connected in the recess 30c.

[0131] In some embodiments, the limiting portion 46 is connected to a side of the end plate 44 away from the platform portion 41. The limiting portion 46 is located on the lower side of the platform portion 41.

[0132] The limiting portion 46 extends into the recess 30 and hooks a side of the limiting rib portion 383 away from the mounting groove 36 to limit the upward movement of the fixing member 40 relative to the fan 22.

[0133] In some embodiments, the limiting rib portion 383 is provided with a protruding rib 3832. The limiting portion 46 abuts against the protruding rib 3832.

[0134] The provision of the protruding rib 3832 can reduce the contact area between the limiting portion 46 and the collar 30, thereby reducing wear.

[0135] In some embodiments, the protruding rib 3832 is provided in multiple spaced-apart portions to ensure uniform force on the limiting portion 46.

[0136] In some embodiments, the end of the protruding rib 3832 away from the middle disc 221 is provided with a chamfer to facilitate the installation of the limiting portion 46 to the lower side of the protruding rib 3832.

[0137] In this application, through the cooperation of the limiting portion 46 and the limiting rib portion 383, the lower part of the fixing member 40 is limited together with the collar 30, thereby avoiding the movement of the lower part of the fixing member 40 relative to the collar 30.

[0138] In some embodiments, two limiting ribs 383 are provided on the left and right sides. Two limiting parts 46 are connected to the end plate 44. Each of the two limiting parts 46 corresponds to one limiting rib 383.

[0139] In this application, the platform portion 41 of the fastener 40 cooperates with the mounting groove 36 of the collar 30 to form a limiting position, and the two limiting portions 46 cooperate with the limiting rib portion 383 to form two limiting positions, thereby forming three limiting positions on the outer periphery of the fastener 40 and the collar 30, which can ensure the stability and reliability of the limiting structure.

[0140] In some embodiments, the limiting rib 383 may be located below the through portion 30a. Correspondingly, the limiting portion 46 is connected to the lower end of the end plate 44.

[0141] The limiting rib 383 is parallel to the first plane 3421, and the extended surfaces of the two limiting ribs 383 are coplanar.

[0142] In some embodiments, the outer ring 34 may be formed by connecting an arc segment 341 and a flat plate segment 342 end to end.

[0143] The arc segment 341 is curved. The flat plate segment 342 is flat and connects to both ends of the arc segment 341. The mounting groove 36 is provided on the flat plate segment 342 of the outer ring portion 34. The inner ring portion 35 is coaxial with the arc segment 341.

[0144] 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.

[0145] The outer circumference of the inner ring 35 intersects with the flat plate segment 342.

[0146] In some embodiments, refer to Figure 7 A first reinforcing rib 381 is connected between the outer ring portion 34 and the inner ring portion 35, and the first reinforcing rib 381 is spaced apart from the limiting rib portion 383. The first reinforcing rib 381 and the limiting rib portion 383 can be arranged in parallel.

[0147] Both the first reinforcing rib 381 and the limiting rib 383 can enhance the structural strength of the collar 30.

[0148] In some embodiments, refer to Figure 13 , Figure 14 and Figure 16 The limiting rib 383 is connected to the outer side of the collar 30. The limiting rib 383 is connected to the outer peripheral surface of the collar 30. The front side of the limiting rib 383 is connected to the middle plate 221.

[0149] In some embodiments, refer toFigure 15 The limiting portion 46 is provided with a limiting groove 461. The limiting groove 461 is inserted and matched with the limiting rib portion 383. The lower side of the limiting groove 461 formed on the limiting portion 46 is in abutment with the limiting rib portion 383.

[0150] In some embodiments, the limiting portion 46 can be in the shape of a flat plate.

[0151] In some embodiments, referring to Figure 16 The limiting portion 46 can be in the shape of a circular arc plate. The center of the limiting portion 46 coincides with the center of the limiting hole 441. The inner circular arc surface of the limiting portion 46 is in abutment with the outer peripheral surface of the shaft ring 30.

[0152] In some embodiments, the driving shaft 230 can be provided with an anti-rotation flat surface 2331. The limiting hole 441 on the fixing member 40 is provided with a shape corresponding to the driving shaft 230.

[0153] That is, the limiting hole 441 is in the shape of a D, and the portion of the driving shaft 230 matched with the limiting hole 441 is also in the shape of a D.

[0154] In some embodiments, referring to Figure 14 The first reinforcing rib 381 can be connected between the outer ring portion 34 and the inner ring portion 35 in a radial manner.

[0155] In some embodiments, the fan 22 is provided with a second reinforcing rib 225. The second reinforcing rib 225 is connected to the outer peripheral 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.

[0156] The second reinforcing rib 225 is in the shape of a substantially triangular plate. One side of the second reinforcing rib 225 forming a triangle is connected to the middle disc 221, and the other side of the second reinforcing rib 225 forming a triangle is connected to the outer periphery of the shaft ring 30.

[0157] The first reinforcing rib 381 and the second reinforcing rib 225 are located on different diameters of the shaft ring 30, and the first reinforcing rib 381 and the second reinforcing rib 225 are distributed in a dispersed manner, which can increase the structural strength of the shaft ring 30 as much as possible.

[0158] In some embodiments, referring to Figure 8 and Figure 11 When the limiting portion 46 is in abutment with the limiting rib portion 383, the distance from the lower side of the limiting rib portion 383 to the first plane 3421 is Lc1, and the distance between the limiting portion 46 and the platform portion 41 on the fixing member 40 is Ld1.

[0159] Lc1≤Ld1, which can ensure that the fixing member 40 can be mounted on the shaft ring 30.

[0160] Ld1≤Lc1+1mm, so that the limiting portion 46 tightly grips the limiting rib portion 383, limits the upward movement of the fixing member 40, and thus ensures that the fastening screw 25 can tightly press against the drive shaft 230.

[0161] If Ld1>Lc1+1mm, the fitting gap is large, and the effect of the limiting portion 46 and the limiting rib portion 383 on limiting the upward movement of the fixing member 40 is affected.

[0162] In some embodiments, referring to Figure 8 and Figure 12 , the distance between the first stop surface 361 and the second stop surface 362 on the shaft ring 30 is Lc2. The distance between the first positioning plane 412 and the second positioning plane 413 on the fixing member 40 is Ld2.

[0163] Ld2

[0164] Lc2≤Ld2+1mm, a small gap is formed between Lc2 and Ld2, which can ensure the limiting effect of the platform portion 41 and the shaft ring 30 in the left-right direction.

[0165] In some embodiments, referring to Figure 8 and Figure 11 , the diameter of the through portion 30a on the shaft ring 30 is Dc1; the diameter of the limiting hole 441 on the fixing member 40 is Dd1. The distance between the first plane 3421 and the bottom end of the through portion 30a on the shaft ring 30 is Lc3; the distance between the lower side of the platform portion 41 and the lower end of the limiting hole 441 on the fixing member 40 is Ld3.

[0166] Dc1+0.2mm<Dd1. If Dc1+0.2mm≥Dd1, the fitting gap between the limiting hole 441 and the drive shaft 230 is small, which can cause the platform portion 41 to fail to be installed on the shaft ring 30 or the platform portion 41 to fail to abut against the first plane 3421.

[0167] By setting Dc1+0.2mm<Dd1, the gap between the drive shaft 230 and the fixing member 40 can be used to make the platform portion 41 abut against the first plane 3421.

[0168] Lc3≤Ld3, which 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.

[0169] Ld3≤Lc3+1mm, so that the lower part of the circular side surface of the limiting hole 441 on the fixing member 40 can abut against the drive shaft 230, limiting the upward movement of the fixing member 40, and thus ensuring that the fastening screw 25 can tightly press against the drive shaft 230.

[0170] In some embodiments, the thickness Tb of the fixing member 40 satisfies: 0.8mm≤Tb. In this size range, the structural strength of the fixing member 40 can be guaranteed, and the problem of easy deformation of the fixing member 40 due to being too thin can be avoided.

[0171] Tb≤5mm. In this range, the overall weight at the fan 22 can be avoided due to the fixing member 40 being too thick.

[0172] In some embodiments, a clamp can be connected on the drive shaft 230, and the clamp abuts against the side of the end plate 44 away from the shaft ring 30.

[0173] In this application, when the fan 22 is installed on the drive shaft 230, the through portion 30a in the middle of the fan 22 is put on the drive shaft 230, the fan 22 is placed at the required position on the drive shaft 230, and then the fixing member 40 is sleeved on the drive shaft 230 and installed on the shaft ring 30. The screwdriver enters the avoiding hole 2221 of the fan 22, and the fastening screw 25 is screwed into the mounting hole 410 on the fixing member 40, so that the fan 22 is effectively fixed on the drive shaft 230.

[0174] 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.

[0175] 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 obtained 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 hub; a plurality of blades connected to the outer periphery of the hub; a collar connected to the middle part of the hub and extending along the axial direction of the fan, the collar being provided with: a through portion for the driving shaft to pass through; an avoiding portion in communication with the through portion; a mounting groove recessed inward from the end face of the collar, the mounting groove being in communication with the avoiding portion; a fixing member connected to the collar, the fixing member comprising: an end plate provided with a limiting hole for the driving shaft to pass through; a platform portion connected to the end plate, the platform portion being adapted to the mounting groove; a fastener screwed to the platform portion and passing through the avoiding portion, the end portion of the fastener abutting against the driving shaft to tightly press the driving shaft.

2. The fan assembly of claim 1, wherein, The collar comprises: an outer ring portion comprising circular arc segments and flat plate segments connected to each other, the flat plate segments being provided with the mounting groove; an inner ring portion provided in the outer ring portion, the inner portion of the inner ring portion forming the through portion, and the space between the inner ring portion and the outer ring portion forming a recess portion; a limiting rib portion connected to the recess portion; the fixing member further comprises a limiting portion connected to the end plate, the limiting portion being inserted into the recess portion and abutting against the side of the limiting rib portion away from the mounting groove.

3. The fan assembly of claim 1, wherein, The outer periphery of the collar is connected with a limiting rib portion; the fixing member further comprises a limiting portion connected to the end plate, the limiting portion abutting against the side of the limiting rib portion away from the mounting groove.

4. The fan assembly of claim 1, wherein, The outer periphery of the collar is connected with a limiting rib portion; the fixing member further comprises a limiting portion connected to the end plate, the limiting portion being provided with a limiting groove, the limiting groove being in plug-in cooperation with the limiting rib portion.

5. The fan assembly of claim 1, wherein, The side of the mounting groove away from the through portion is in an open state, and the avoiding portion is in an open state on the side away from the hub, so that the fastener connected to the platform portion can enter the collar from the open side of the avoiding portion during assembly.

6. The fan assembly of any one of claims 2-4, wherein, The side of the side surface of the collar surrounding the mounting groove close to the through portion is a first plane, and the platform portion abuts against the first plane.

7. The fan assembly of claim 6, wherein, The distance from the side of the limiting rib portion away from the mounting groove to the first plane is Lc1, and the distance between the limiting portion and the platform portion is Ld1; Lc1≤Ld1≤Lc1+1mm.

8. The fan assembly of claim 6, wherein, The maximum distance from the first plane to the edge of the through portion is Lc3, and the maximum distance from the platform portion to the edge of the limiting hole is Ld3; Lc3≤Ld3≤Lc3+1mm.

9. The fan assembly of claim 1 or 2 or 3 or 4 or 5 or 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 provided 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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