Outer rotor motor assembly for low-noise cross-flow fan

Abstract

The invention discloses an outer rotor motor assembly for a low-noise cross-flow fan, which comprises a volute, a butt-joint bearing arranged in the volute, a butt-joint seat arranged on the outer side of the butt-joint bearing, a bearing chamber arranged on the top of the butt-joint bearing and the butt-joint seat, an air guide assembly arranged outside the bearing chamber, a storage box arranged on the outer side of the volute, and a lubricant arranged in the storage box. A plurality of transmission channels are arranged in the volute and used for penetrating through the storage box and the butt joint seat, a plurality of butt joint holes are formed in the butt joint seat and used for conveying a lubricating agent, components in the bearing chamber can be oiled and lubricated, the jamming condition is reduced, and a margin monitoring module is arranged outside the storage box; compared with the prior art, the external rotor motor assembly has an automatic lubrication function, can significantly prolong the maintenance period, can timely warn internal wear by monitoring the allowance and flow velocity of a lubricant in real time, ensures uniform distribution of lubrication, and effectively improves the operation stability and reduces the noise by combining with a magnetic attraction stabilization technology.

Description

Technical Field

[0001] This invention relates to the field of motor assembly technology, specifically to an external rotor motor assembly for a low-noise cross-flow fan. Background Technology

[0002] External rotor fans (also known as hub fans) are widely used in air conditioning systems, cooling towers, heat exchangers, and mechanical equipment heat dissipation due to their advantages such as compact structure, high efficiency, and uniform air output.

[0003] In external rotor motor assemblies, bearings are critical moving parts of the fan, and their reliability directly determines the overall lifespan of the machine. Especially when vertically installed, the weight of the rotor and impeller is entirely applied to the bearings, creating a continuous axial load. Furthermore, during operation, vibrations from the fan and the inertial impacts of starting / stopping accelerate bearing wear. Existing bearing lubrication typically involves adding a fixed amount of lubricant and then replenishing it periodically. If the grease dries out due to unforeseen circumstances, it can damage the bearings, and noise issues may also occur during operation. Therefore, we propose an external rotor motor assembly for low-noise cross-flow fans to address these problems. Summary of the Invention

[0004] The purpose of this invention is to provide an external rotor motor assembly for a low-noise cross-flow fan, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an external rotor motor assembly for a low-noise cross-flow fan, comprising,

[0006] The volute has a docking bearing inside and a docking seat outside the docking bearing. A bearing chamber is located on the top of the docking bearing and the docking seat. An air guide assembly is located outside the bearing chamber. A storage box is located outside the volute. Lubricant is located inside the storage box. Several transmission channels are located inside the volute, and the transmission channels are used to connect the storage box and the docking seat.

[0007] The docking seat has several docking holes inside, which are used to deliver lubricant and lubricate the components inside the bearing chamber, reducing jamming. The storage box is equipped with a balance monitoring module to monitor the remaining amount and usage rate of lubricant. During the operation of the fan assembly, the lubricant can be delivered to the bearing chamber with the help of external air pressure equipment, which can effectively reduce internal wear. During operation, it can effectively extend the overall maintenance cycle of the equipment and reduce the time spent on disassembly and lubrication. The balance monitoring module can reflect the rate at which lubricant is added. When the rate of addition changes, timely inspection and maintenance can be carried out, and timely feedback can be given on the internal wear, which can reduce the economic losses caused by continuous wear.

[0008] Preferably, a transmission shaft is inserted into the bottom of the docking hole, a hollow groove is provided at the bottom of the transmission shaft, a conduction groove is provided outside the hollow groove, an annular groove is provided at the bottom of the docking seat, and the annular groove is used to store lubricant. The position of the bottom of the transmission shaft with the conduction groove can be reciprocated into the annular groove under the action of external force. Several drainage grooves are provided inside the transmission shaft, and the drainage grooves are used to guide the lubricant to the top of the transmission shaft for lubrication of the transmission components inside the bearing chamber.

[0009] The transmission shaft has a narrower outer diameter at the location of the hollow groove and is fitted with a snap-fit ​​spring on the outside to push the transmission shaft to reset. The lubrication system automatically delivers lubricant to the bearing chamber under the action of external pneumatic equipment, effectively reducing wear and jamming of transmission components, avoiding frequent disassembly and maintenance, significantly extending the overall maintenance cycle of the equipment, and reducing downtime and labor losses.

[0010] Preferably, a docking annular groove is formed on the surface of the transmission shaft, and the docking annular groove is connected to one side of the drain groove, which is used to pour lubricant into the outside of the transmission shaft to reduce the occurrence of jamming during continuous operation.

[0011] A transmission frame is fitted inside the docking hole. The transmission frame has a wavy transmission groove inside. A fixing block is connected inside the docking ring groove. A transmission protrusion is provided at the outer end of the fixing block and is engaged inside the transmission groove. This is used for the transmission shaft to rotate during reciprocating motion. A sealing gasket is provided at the top of the docking hole. The sealing gasket is attached to the outside of the transmission shaft. The structure ensures uniform lubrication distribution and reduces the possibility of local leakage.

[0012] Preferably, the storage box and the volute are connected by a circular groove, and a hollow tube is provided inside the circular groove. A conveying pipe is provided inside the hollow tube, and a conveying plate is provided at the top of the conveying pipe. A docking shaft is provided at the volute, and the docking shaft is used to abut against the drain hole at the top of the conveying plate.

[0013] The storage box is equipped with a one-way air inlet pipe on its exterior, which is used to connect to an external air pressure device to export the internal lubricant. Under the action of the external air pressure device, the lubricant is automatically delivered to the bearing chamber.

[0014] Preferably, the hollow tube is provided with several compression shafts inside. The compression shafts abut against the edge of the conveyor plate to compress the internal elastic channel and play a sealing role. A limit spring is provided between the conveyor plate and the bottom of the circular groove to facilitate subsequent disassembly and reduce leakage. The connection between the storage box and the volute adopts a sealing structure designed with compression shafts and limit springs, which can automatically seal the lubricant channel during disassembly or installation to prevent leakage.

[0015] Preferably, the lubricant replenishment monitoring module includes a digital display screen, an audible and visual alarm, a level sensor, and a processor. The level sensor detects the internal lubricant level and transmission speed, and works with the processor to display the data on the digital display screen. The lubricant replenishment monitoring module can monitor the lubricant level and usage speed in real time and display the data on the digital display screen. When the lubricant replenishment speed is abnormal, the audible and visual alarm can issue an alarm in time, helping operators to quickly detect internal wear or blockage problems, thereby enabling early maintenance and reducing economic losses caused by continuous wear.

[0016] Preferably, the bearing chamber is provided with an air guiding mechanism consisting of a connecting frame and several air guide blades. The connecting frame is located on the outer wall of the bearing chamber, and the air guide blades are arranged in a uniform array outside the connecting frame.

[0017] Preferably, the bearing chamber has several arc-shaped grooves on its inner wall, and a magnetic plate is installed inside the arc-shaped grooves. A transmission ring frame is installed inside the bearing chamber, and the position of the transmission ring frame corresponds to the docking seat. The bottom of the transmission ring frame has several arc-shaped protrusions, which can continuously squeeze the transmission shaft to drive it.

[0018] Preferably, the outer side of the mating bearing is provided with several fixing grooves, and the fixing grooves are provided with snap-fit ​​magnetic blocks to cooperate with the magnetic plate to reduce the offset of the bearing chamber, effectively reduce the offset and vibration during operation, improve the stability of the external rotor motor, and reduce the noise during equipment operation.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. This invention can monitor the lubricant level and usage rate in real time through the lubricant replenishment module and display the data on a digital display screen; when the lubricant replenishment rate is abnormal, the audible and visual alarm can issue an alarm in time to help operators quickly find internal wear or blockage problems, thereby carrying out maintenance in advance and reducing economic losses caused by continuous wear.

[0021] 2. The present invention uses a lubrication system consisting of a storage box, a transmission channel and a docking hole to automatically deliver lubricant to the bearing chamber under the action of an external pneumatic device. This effectively reduces wear and jamming of transmission components, avoids frequent disassembly and maintenance, significantly extends the overall maintenance cycle of the equipment, and reduces downtime and labor losses.

[0022] 3. In this invention, the transmission shaft achieves rotational motion through the cooperation of the transmission frame and the fixed block during reciprocating motion, so that the lubricant is evenly guided to the bearing chamber through the drain groove and the docking ring groove, avoiding local leakage, ensuring that the transmission components are fully lubricated, and further reducing the risk of jamming and wear.

[0023] 4. This invention uses a magnetic plate installed on the inner wall of the bearing chamber to attract the magnetic block on the mating bearing, which effectively reduces the offset and vibration during operation, improves the stability of the external rotor motor, and reduces the noise during equipment operation, meeting the design requirements of low-noise fans.

[0024] 5. The present invention uses a sealing structure with a compression shaft and a limit spring at the connection between the storage box and the volute. This structure can automatically seal the lubricant channel during disassembly or installation to prevent leakage. The overall structure is easy to maintain and handle in emergencies, ensuring the continuous and efficient operation of the fan. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the exploded disassembly structure of the volute of the present invention;

[0027] Figure 3 This is a schematic diagram of the storage box structure of the present invention;

[0028] Figure 4 For the present invention Figure 3 Enlarged view of a portion of point A in the middle;

[0029] Figure 5 This is a schematic diagram of one side of the margin monitoring module of the present invention;

[0030] Figure 6 This is a schematic diagram of the internal structure of the volute of the present invention;

[0031] Figure 7 This is a schematic diagram of the partially exploded disassembled structure of the docking seat of the present invention;

[0032] Figure 8 For the present invention Figure 7 Enlarged view of a portion of point B in the middle;

[0033] Figure 9 This is a schematic cross-sectional view of the transmission shaft structure of the present invention;

[0034] Figure 10 This is a schematic diagram of the bottom structure of the bearing chamber of the present invention;

[0035] In the diagram: 1. Volute; 2. Bearing chamber; 3. Storage box; 4. Docking seat; 5. Docking bearing; 21. Connecting frame; 22. Transmission ring frame; 23. Air guide vane; 24. Magnetic plate; 31. Hollow tube; 32. Compression shaft; 33. Conveying pipe; 34. Limiting spring; 35. Conveying disc; 36. Balance monitoring module; 41. Docking hole; 42. Transmission shaft; 421. Docking ring groove; 43. Sealing gasket; 44. Transmission frame; 45. Fixing block; 46. Hollow groove; 461. Drainage groove; 51. Magnetic locking block. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Please see Figures 1-10 This invention provides a technical solution: an external rotor motor assembly for a low-noise cross-flow fan, comprising,

[0038] The volute 1 has a docking bearing 5 inside and a docking seat 4 outside. The top of the docking bearing 5 and the docking seat 4 is a bearing chamber 2. The bearing chamber 2 is equipped with an air guide assembly outside. The volute 1 has a storage box 3 outside and a lubricant inside. The volute 1 has several transmission channels inside and the transmission channels are used to connect the storage box 3 and the docking seat 4.

[0039] The docking seat 4 has several docking holes 41 inside, which are used to deliver lubricant and lubricate the components inside the bearing chamber 2, reducing jamming. The storage box 3 is equipped with a balance monitoring module 36 on the outside, which is used to monitor the balance and usage rate of lubricant. During the operation of the fan assembly, the lubricant can be delivered to the bearing chamber 2 with the help of external air pressure equipment, which can effectively reduce internal wear. During operation, it can effectively extend the overall maintenance cycle of the equipment and reduce the time spent on disassembly and lubrication. The balance monitoring module 36 can reflect the speed of adding lubricant inside. When the adding speed changes, timely inspection and maintenance can be carried out, and timely feedback can be given on the internal wear, which can reduce the economic losses caused by continuous wear.

[0040] like Figure 7 and Figure 9 As shown, a transmission shaft 42 is inserted into the bottom of the docking hole 41. A hollow groove 46 is provided at the bottom of the transmission shaft 42. A conduction groove is provided outside the hollow groove 46. An annular groove is provided at the bottom of the docking seat 4. The annular groove is used to store lubricant. The position where the conduction groove is provided at the bottom of the transmission shaft 42 can be repeatedly inserted into the annular groove under the action of external force. Several drainage grooves 461 are provided inside the transmission shaft 42. The drainage grooves 461 are used to guide the lubricant to the top of the transmission shaft 42 for lubrication of the transmission components inside the bearing chamber 2.

[0041] The outer diameter of the transmission shaft 42 is narrowed at the location of the hollow groove 46 and a snap-fit ​​spring is sleeved on the outside to push the transmission shaft 42 to reset. With the help of the arc-shaped protrusion at the bottom of the transmission ring frame 22, the top of the transmission shaft 42 is continuously squeezed, which can drive the transmission shaft 42 to reciprocate. The bottom hollow groove 46 is inserted into the ring groove. Under the action of external air pressure equipment, lubricant can be delivered to the hollow groove 46 and the drain groove 461. A certain amount of lubricant can be discharged along the top of the transmission shaft 42, which can lubricate the contact end and replenish the lubricant lost during continuous operation.

[0042] like Figure 7 , Figure 8 and Figure 9 As shown, a docking ring groove 421 is provided on the surface of the transmission shaft 42. The docking ring groove 421 is connected to one side of the drain groove 461 and is used to pour lubricant into the outside of the transmission shaft 42 to reduce the situation of jamming during continuous operation. During the transmission process, a portion of the lubricant can be discharged along the docking ring groove 421, which can also reduce the wear of the transmission shaft 42 during continuous movement.

[0043] A transmission frame 44 is fitted inside the docking hole 41. The transmission frame 44 has a wave-shaped transmission groove inside. A fixing block 45 is connected inside the docking ring groove 421. A transmission protrusion is provided at the outer end of the fixing block 45 and is fitted inside the transmission groove. The transmission protrusion is used to rotate the transmission shaft 42 during reciprocating motion. A sealing gasket 43 is provided at the top of the docking hole 41. The sealing gasket 43 is attached to the outside of the transmission shaft 42. During the reciprocating motion of the transmission shaft 42, the transmission shaft 42 can be driven to rotate under the cooperation of the transmission groove inside the transmission frame 44 and the fixing block 45. Several arc-shaped grooves can be fitted on the outer wall of the transmission shaft 42 to drive the lubricant to flow within a fixed range, which can reduce the accidental situation of partial leakage.

[0044] like Figure 3 As shown, a circular groove is provided at the connection between the storage box 3 and the volute 1, and a hollow tube 31 is provided inside the circular groove. A conveying tube 33 is provided inside the hollow tube 31, and a conveying plate 35 is provided at the top of the conveying tube 33. A docking shaft is provided at the docking point of the volute 1, and the docking shaft is used to abut against the drain hole at the top of the conveying plate 35.

[0045] The storage box 3 is equipped with a one-way air inlet pipe for connecting to an external air pressure device to export the internal lubricant. Under the action of the external air pressure device, the lubricant can be conducted to the annular groove inside the docking seat 4, and the lubricant can be replaced and replenished in a timely manner. Compared with the traditional disassembly and replenishment, it can save downtime maintenance time.

[0046] like Figure 3 and Figure 4As shown, the hollow tube 31 is equipped with several compression shafts 32. The compression shafts 32 abut against the edge of the conveyor plate 35 to compress the internal elastic channel and achieve a sealing effect. A limit spring 34 is provided between the conveyor plate 35 and the bottom of the circular groove to facilitate subsequent disassembly and reduce leakage. When the storage box 3 at the rear end is disassembled and installed, the conveyor plate 35 can abut against one end of the hollow tube 31 without the cooperation of the connecting pipe. With the help of the compression shafts 32, it can abut against the elastic pipe at the edge of the conveyor plate 35, which can deform and seal the inside, reduce the leakage of internal lubricant due to angle problems during installation, and facilitate subsequent maintenance.

[0047] like Figure 5 As shown, the remaining fluid monitoring module 36 includes a digital display screen, an audible and visual alarm, a liquid level sensor, and a processor. The liquid level sensor detects the internal remaining fluid level and transmission speed, which, in conjunction with the processor, displays the data on the digital display screen. The remaining fluid monitoring module 36 provides feedback on the internal lubricant delivery speed, allowing the system to determine the internal operating status based on the data feedback. When the lubricant delivery speed decreases, wear occurs on the internal delivery components, and when the lubricant replenishment speed drops to a certain level, the audible and visual alarm serves as a reminder, enabling timely shutdown and maintenance. It can also control the pressure of external pneumatic equipment based on data feedback, maintaining the corresponding lubricant replenishment efficiency even in the event of localized blockage in the replenishment mechanism, ensuring normal equipment operation for a short period, and serving as an emergency response mechanism.

[0048] like Figure 2 As shown, an air guiding mechanism consisting of a connecting frame 21 and several air guide blades 23 is provided outside the bearing chamber 2. The connecting frame 21 is located on the outer wall of the bearing chamber 2, and the air guide blades 23 are arranged in a uniform array outside the connecting frame 21.

[0049] like Figure 10 As shown, several arc-shaped grooves are provided on the inner wall of the bearing chamber 2, and magnetic plates 24 are installed inside the arc-shaped grooves. A transmission ring frame 22 is installed inside the bearing chamber 2. The position of the transmission ring frame 22 corresponds to the docking seat 4. Several arc-shaped protrusions are provided at the bottom of the transmission ring frame 22. By means of the arc-shaped protrusions at the bottom of the transmission ring frame 22, the top of the transmission shaft 42 is continuously squeezed, which can drive the transmission shaft 42 to reciprocate and play a driving role.

[0050] like Figure 6 and Figure 10 As shown, the bearing 5 has several fixing grooves on its outside, and a snap-fit ​​magnetic block 51 is provided inside the fixing groove. This is used to cooperate with the magnetic plate 24 to reduce the misalignment of the bearing chamber 2. With the cooperation of the snap-fit ​​magnetic block 51 and the magnetic plate 24, the unexpected situation of unstable operation during operation is reduced, and the wear and noise during equipment operation can be reduced.

[0051] Working Principle: Firstly, during the operation of the fan assembly, external air pressure equipment delivers lubricant to the bearing chamber 2, effectively reducing internal wear. This also extends the overall maintenance cycle of the equipment and reduces the time spent on disassembly and lubrication. The lubrication level monitoring module 36 detects the rate of lubricant addition; changes in the addition rate allow for timely inspection and maintenance, providing immediate feedback on internal wear and reducing economic losses from continuous wear. Furthermore, the operation of the fan assembly enables the bearing chamber 2 to undergo overall circular motion. By continuously squeezing the top of the transmission shaft 42 with the arc-shaped protrusion at the bottom of the transmission ring frame 22, the transmission shaft 42 can be driven to reciprocate. The bottom hollow groove 46 is inserted into the ring groove. Under the action of external air pressure equipment, lubricant can be delivered to the hollow groove 46 and the drain groove 461. A certain amount of lubricant can be discharged along the top of the transmission shaft 42, which can lubricate the contact end and replenish the lubricant lost during continuous operation. In addition, during the transmission process, a portion of the lubricant can be discharged along the docking ring groove 421, which can also reduce the wear of the transmission shaft 42 during continuous operation.

[0052] Then, during the reciprocating motion of the transmission shaft 42, the transmission shaft 42 can be rotated by the cooperation of the transmission groove inside the transmission frame 44 and the fixed block 45. Several arc-shaped grooves can be provided on the outer wall of the transmission shaft 42 to drive the lubricant to flow within a fixed range, which can reduce the accidental situation of partial leakage. Furthermore, during the operation of the equipment, the cooperation of the locking magnetic block 51 and the magnetic plate 24 can reduce the deviation during operation and reduce the wear during internal operation.

[0053] Finally, with the help of the residual monitoring module 36, the internal lubricant delivery speed can be fed back, and the internal operating status can be known based on the data feedback. When the lubricant delivery speed decreases, wear occurs on the internal delivery components, and when the lubricant replenishment speed decreases to a certain level, an audible and visual alarm can be used to remind the user, enabling timely shutdown and maintenance. When disassembling and installing the storage box 3 at the rear end, the delivery disc 35, without the cooperation of the connecting pipe, can abut against one end of the hollow tube 31, and with the help of the compression shaft 32, it can abut against the elastic pipe on the edge of the delivery disc 35, which can deform and seal the inside, reducing the possibility of internal lubricant leakage due to angle issues during installation, and facilitating subsequent maintenance.

[0054] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An external rotor motor assembly for a low-noise cross-flow fan, characterized in that: include, A volute (1) is provided with a docking bearing (5) inside the volute (1), a docking seat (4) is provided on the outside of the docking bearing (5), a bearing chamber (2) is provided on the top of the docking bearing (5) and the docking seat (4), an air guide assembly is provided on the outside of the bearing chamber (2), a storage box (3) is provided on the outside of the volute (1), a lubricant is provided inside the storage box (3), and several transmission channels are provided inside the volute (1), and the transmission channels are used to pass through the storage box (3) and the docking seat (4). The docking seat (4) is provided with several docking holes (41) inside. The docking holes (41) are used to deliver lubricant and can lubricate the components inside the bearing chamber (2) to reduce jamming. The storage box (3) is provided with a balance monitoring module (36) outside to monitor the balance of lubricant and the usage speed.

2. The external rotor motor assembly for a low-noise cross-flow fan according to claim 1, characterized in that: A transmission shaft (42) is inserted into the bottom of the docking hole (41). A hollow groove (46) is provided at the bottom of the transmission shaft (42). A conduction groove is provided outside the hollow groove (46). An annular groove is provided at the bottom of the docking seat (4). The annular groove is used to store lubricant. The position where the conduction groove is provided at the bottom of the transmission shaft (42) can be repeatedly inserted into the annular groove under the action of external force. Several drainage grooves (461) are provided inside the transmission shaft (42). The drainage grooves (461) are used to guide the lubricant to the top of the transmission shaft (42) for lubricating the transmission components inside the bearing chamber (2). The transmission shaft (42) has a narrowed outer diameter at the location of the hollow groove (46) and is fitted with a snap-fit ​​spring on the outside, which is used to push the transmission shaft (42) to reset.

3. The external rotor motor assembly for a low-noise cross-flow fan according to claim 2, characterized in that: A docking ring groove (421) is provided on the surface of the transmission shaft (42). The docking ring groove (421) is connected to one side of the drain groove (461) to pour lubricant into the outside of the transmission shaft (42) to reduce the occurrence of jamming during continuous operation. The docking hole (41) is fitted with a transmission frame (44), and the transmission frame (44) has a wave-shaped transmission groove inside. The docking ring groove (421) is connected with a fixing block (45), and the outer end of the fixing block (45) is provided with a transmission protrusion, which is fitted inside the transmission groove for the transmission shaft (42) to rotate during reciprocating motion. The top of the docking hole (41) is provided with a sealing gasket (43), which is attached to the outside of the transmission shaft (42).

4. The external rotor motor assembly for a low-noise cross-flow fan according to claim 1, characterized in that: The storage box (3) is provided with a circular groove at the connection between it and the volute (1), and a hollow tube (31) is provided inside the circular groove. A conveying tube (33) is provided inside the hollow tube (31), and a conveying plate (35) is provided at the top of the conveying tube (33). A docking shaft is provided at the docking point of the volute (1), and the docking shaft is used to abut against the drain hole at the top of the conveying plate (35). The storage box (3) is provided with a one-way air inlet pipe on the outside, which is used to connect to an external air pressure setting to export the internal lubricant.

5. The external rotor motor assembly for a low-noise cross-flow fan according to claim 4, characterized in that: The hollow tube (31) is provided with several compression shafts (32). The compression shafts (32) abut against the edge of the conveyor plate (35) to compress the internal elastic channel and play a sealing role. A limit spring (34) is provided between the conveyor plate (35) and the bottom of the circular groove to facilitate subsequent disassembly and reduce leakage.

6. The external rotor motor assembly for a low-noise cross-flow fan according to claim 1, characterized in that: The remaining volume monitoring module (36) includes a digital display screen, an audible and visual alarm, a liquid level sensor, and a processor. The liquid level sensor can detect the internal remaining volume and transmission speed, and is used to cooperate with the processor to display the data on the digital display screen.

7. The external rotor motor assembly for a low-noise cross-flow fan according to claim 1, characterized in that: The bearing chamber (2) is provided with an air guiding mechanism consisting of a connecting frame (21) and several air guide blades (23) on the outside. The connecting frame (21) is located on the outer wall of the bearing chamber (2), and the air guide blades (23) are arranged in a uniform array outside the connecting frame (21).

8. The external rotor motor assembly for a low-noise cross-flow fan according to claim 1, characterized in that: The bearing chamber (2) has several arc-shaped grooves on its inner wall, and a magnetic plate (24) is installed inside the arc-shaped grooves. A transmission ring frame (22) is installed inside the bearing chamber (2). The position of the transmission ring frame (22) corresponds to the docking seat (4). The bottom of the transmission ring frame (22) has several arc-shaped protrusions.

9. The external rotor motor assembly for a low-noise cross-flow fan according to claim 1, characterized in that: The external of the docking bearing (5) is provided with several fixing grooves, and the fixing grooves are provided with snap-fit ​​magnetic blocks (51) to cooperate with the magnetic plate (24) to reduce the offset of the bearing chamber (2).

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