An outer rotor motor assembly for a low noise crossflow fan

Abstract

The application discloses a kind of outer rotor motor assemblies of low-noise cross-flow fan, comprising, volute, volute inside is provided with docking bearing, docking bearing outside is provided with docking seat, docking bearing and the top of docking seat are provided with bearing chamber, bearing chamber outside is equipped with air guide assembly, volute outside is provided with storage box, storage box inside is equipped with lubricant, volute inside is provided with several transmission channels, and transmission channel is used to pass through storage box and docking seat, docking seat inside is provided with several docking holes, docking hole is used to transport lubricant, can the component in the inside of bearing chamber is oiled lubrication, reduce the situation of jam, storage box outside is provided with excess monitoring module;Compared with prior art, the outer rotor motor assembly has automatic lubrication function, can significantly prolong maintenance cycle, by real-time monitoring lubricant excess and flow rate, timely early warning internal wear, and ensure that lubrication is evenly distributed, and combined with magnetic attraction stability technology, effectively improve operating stability, reduce noise.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of motor assemblies, in particular to an outer rotor motor assembly for a low-noise cross-flow fan. BACKGROUND

[0002] The outer rotor fan (also known as a hub fan) is widely used in air conditioning systems, cooling towers, heat exchangers, mechanical equipment heat dissipation, etc. due to its compact structure, high efficiency, and uniform air outlet.

[0003] In the outer rotor motor assembly, the bearing is a key moving part of the fan, and its reliability directly determines the service life of the whole machine. When installed vertically, the weight of the rotor and impeller is fully applied to the bearing, forming a continuous axial load. In addition, the vibration during fan operation and the inertial impact during start / stop can accelerate bearing wear. The existing bearing lubrication generally involves adding a fixed amount of lubricant, which is then periodically replenished and maintained. Once the oil dries up due to unexpected circumstances, the bearing will be damaged. Moreover, noise and other issues may occur during operation. Therefore, an outer rotor motor assembly for a low-noise cross-flow fan is proposed to solve the above problems. SUMMARY

[0004] The present application aims to provide an outer rotor motor assembly for a low-noise cross-flow fan to solve the problems mentioned in the background.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solution: an outer rotor motor assembly for a low-noise cross-flow fan, comprising,

[0006] a volute, the volute is internally provided with a butt joint bearing, the butt joint bearing is externally provided with a butt joint seat, the butt joint bearing and the butt joint seat are provided with a bearing chamber at the top, the bearing chamber is externally provided with a wind guide assembly, the volute is externally provided with a storage box, the storage box is internally provided with a lubricant, the volute is internally provided with a plurality of transmission channels, and the transmission channels are used to pass through the storage box and the butt joint seat;

[0007] The butt joint seat is internally provided with a plurality of butt joint holes, the butt joint holes are used to transport lubricant, which can lubricate the components inside the bearing chamber, reduce the jamming situation, and the storage box is externally provided with a residual amount monitoring module, which is used to monitor the residual amount and use speed of the lubricant. During the operation of the fan assembly, the lubricant can be transported to the inside of the bearing chamber with the help of external air pressure equipment, which can effectively reduce internal wear and tear. During operation, the maintenance cycle of the entire device can be effectively extended, and the labor hours of intermediate lubrication disassembly can be reduced. With the help of the residual amount monitoring module, the internal lubricant addition speed can be reflected. When the addition speed changes, timely maintenance and repair can be performed, and the economic losses caused by continuous wear and tear can be reduced.

[0008] Preferably, the bottom of the docking hole is provided with a transmission shaft, the bottom of the transmission shaft is provided with a hollow groove, the outside of the hollow groove is provided with a conductive groove, the bottom of the docking seat is provided with an annular groove, and the annular groove is used for storing lubricant, the position of the bottom of the transmission shaft provided with the conductive groove can reciprocate and insert into the inside of the annular groove under the action of external force, the inside of the transmission shaft is provided with a plurality of drainage grooves, and the drainage grooves are used for guiding the lubricant to the top of the transmission shaft to lubricate the transmission assembly in the bearing chamber.

[0009] The position of the transmission shaft provided with the hollow groove is narrowed in outer diameter and is externally provided with a clamping spring for pushing the transmission shaft to reset. The lubricating system automatically delivers the lubricant to the inside of the bearing chamber under the action of external air pressure equipment, effectively reduces the wear and jamming of the transmission parts, avoids frequent disassembly and maintenance, significantly prolongs the overall maintenance period of the equipment, and reduces downtime and man-hour loss.

[0010] Preferably, the surface of the transmission shaft is provided with a docking ring groove, the docking ring groove is communicated with one side of the drainage groove, and the docking ring groove is used for pouring the lubricant into the outside of the transmission shaft to reduce the jamming during continuous operation.

[0011] The inside of the docking hole is provided with a transmission frame, the inside of the transmission frame is provided with a transmission groove in a wave shape, the inside of the docking ring groove is connected with a fixed clamping block, the outer end of the fixed clamping block is provided with a transmission protrusion, the transmission protrusion is clamped in the inside of the transmission groove, and the transmission protrusion is used for rotating the transmission shaft in the reciprocating movement process. The top of the docking hole is provided with a sealing washer, and the sealing washer is attached to the outside of the transmission shaft. The structure ensures uniform distribution of lubrication and reduces local omission.

[0012] Preferably, the storage box is provided with a circular groove at the connection with the volute, the circular groove is provided with a hollow pipe in the inside, the hollow pipe is provided with a conveying pipe in the inside, the conveying pipe is provided with a conveying disc at the top end, the volute is provided with a docking shaft at the docking position, and the docking shaft is used for abutting against the drainage hole at the top of the conveying disc.

[0013] The outside of the storage box is provided with a one-way air inlet pipe for connecting external air pressure setting to guide the internal lubricant out and automatically deliver the lubricant to the inside of the bearing chamber under the action of external air pressure equipment.

[0014] Preferably, the inside of the hollow pipe is provided with a plurality of compression shafts abutting against the edge of the conveying disc to compress the internal elastic channel to play a sealing role. Limiting springs are arranged between the conveying disc and the bottom of the circular groove to facilitate subsequent disassembly and reduce leakage. The storage box and the volute are connected by the sealing structure designed by the compression shaft and the limiting spring. When disassembled or installed, the lubricant channel can be automatically sealed to prevent leakage.

[0015] Preferably, the residual amount monitoring module comprises a digital display screen, an audible and light alarm, a liquid level sensor and a processor, the liquid level sensor can detect the internal residual amount and transmission speed, and the processor is used to display data on the digital display screen, the residual amount monitoring module can monitor the residual amount and use speed of the lubricant in real time, and display data on the digital display screen; when the lubricant replenishment speed is abnormal, the audible and light alarm can issue an alarm in time, helping the operator to quickly find the internal wear or blockage problem, so that maintenance can be carried out in advance, and economic losses caused by continuous wear are reduced.

[0016] Preferably, the bearing chamber is externally provided with a wind guide mechanism composed of a connecting frame and a plurality of wind guide blades, the connecting frame is arranged on the outer wall of the bearing chamber, and the wind guide blades are arranged in a uniform array outside the connecting frame.

[0017] Preferably, a plurality of arc-shaped grooves are formed in the inner wall of the bearing chamber, and a magnetic plate is arranged in the arc-shaped grooves, a transmission ring frame is mounted in the bearing chamber, the position of the transmission ring frame corresponds to the butt joint seat, a plurality of arc-shaped protrusions are arranged at the bottom of the transmission ring frame, the arc-shaped protrusions can continuously extrude the transmission shaft, and the transmission ring frame plays a driving role.

[0018] Preferably, a plurality of fixing grooves are arranged outside the butt joint bearing, and a clamping magnetic block is arranged in the fixing grooves, which is used in cooperation with the magnetic plate to reduce the deviation of the bearing chamber, effectively reduce the deviation and vibration during operation, improve the stability of the outer rotor motor, and reduce the noise during equipment operation.

[0019] Compared with the prior art, the present application has the following advantages:

[0020] 1. The residual amount monitoring module can monitor the residual amount and use speed of the lubricant in real time, and display data on the digital display screen; when the lubricant replenishment speed is abnormal, the audible and light alarm can issue an alarm in time, helping the operator to quickly find the internal wear or blockage problem, so that maintenance can be carried out in advance, and economic losses caused by continuous wear are reduced;

[0021] 2. The lubricating system composed of the storage box, the transmission channel and the butt joint hole can automatically transport the lubricant to the inside of the bearing chamber under the action of external air pressure equipment, effectively reduce the wear and jam of the transmission component, avoid frequent disassembly and maintenance, significantly prolong the overall maintenance period of the equipment, and reduce downtime and labor loss;

[0022] 3. The transmission shaft realizes rotary motion through the cooperation of the transmission frame and the fixed clamping block during reciprocating motion, so that the lubricant is uniformly guided to the inside of the bearing chamber through the liquid discharge groove and the butt joint ring groove, local omission is avoided, the transmission assembly is ensured to be fully lubricated, and the risk of jamming and wear is further reduced;

[0023] 4、The magnetic plate arranged on the inner wall of the bearing chamber and the clamping magnetic block on the abutting bearing are mutually adsorbed, offset and vibration during operation are effectively reduced, the stability of the outer rotor motor is improved, noise during equipment operation is reduced, and the design requirement of the low-noise fan is met;

[0024] 5、The sealing structure of the compression shaft and the limiting spring is arranged at the connection position of the storage box and the volute, the lubricant channel can be automatically sealed during disassembly or installation, leakage is prevented, the overall structure is convenient to maintain and emergency treatment, and continuous and efficient operation of the fan is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the application;

[0026] Figure 2 It is a schematic diagram of the exploded structure of the volute of the application;

[0027] Figure 3 It is a schematic diagram of the storage box structure of the application;

[0028] Figure 4 It is a schematic diagram of the application Figure 3 It is a schematic diagram of the application

[0029] Figure 5 It is a schematic diagram of the structure of one side of the remaining amount monitoring module of the application;

[0030] Figure 6 It is a schematic diagram of the internal structure of the volute of the application;

[0031] Figure 7 It is a schematic diagram of the exploded structure of the abutment seat of the application;

[0032] Figure 8 It is a schematic diagram of the application Figure 7 It is a schematic diagram of the application

[0033] Figure 9 It is a schematic diagram of the cross-sectional structure of the transmission shaft of the application;

[0034] Figure 10 It is a schematic diagram of the bottom structure of the bearing chamber of the application;

[0035] In the figure: 1, volute; 2, bearing chamber; 3, storage box; 4, abutment seat; 5, abutting bearing; 21, connecting frame; 22, transmission ring frame; 23, guide vane; 24, magnetic plate; 31, hollow pipe; 32, compression shaft; 33, conveying pipe; 34, limiting spring; 35, conveying disc; 36, remaining amount monitoring module; 41, abutting hole; 42, transmission shaft; 421, abutting ring groove; 43, sealing washer; 44, transmission frame; 45, fixed clamping block; 46, hollow groove; 461, liquid discharge groove; 51, clamping magnetic block. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0037] Please refer to Figures 1-10 The present application provides a technical solution: a low-noise outer rotor motor assembly for a cross-flow fan, comprising,

[0038] The volute 1 is internally provided with a butt joint bearing 5, the butt joint bearing 5 is externally provided with a butt joint seat 4, the butt joint bearing 5 and the top of the butt joint seat 4 are provided with a bearing chamber 2, the bearing chamber 2 is externally provided with a wind guide assembly, the volute 1 is externally provided with a storage box 3, the storage box 3 is internally provided with a lubricant, the volute 1 is internally provided with a plurality of transmission channels, and the transmission channels are used to pass through the storage box 3 and the butt joint seat 4;

[0039] The butt joint seat 4 is internally provided with a plurality of butt joint holes 41, the butt joint holes 41 are used to transport the lubricant, the lubricant can be used to lubricate the components in the bearing chamber 2, the situation of jamming can be reduced, the storage box 3 is externally provided with a residual amount monitoring module 36, which is used to monitor the residual amount and use speed of the lubricant, during the operation of the fan assembly, the lubricant can be transported into the bearing chamber 2 by means of an external air pressure device, the internal wear and tear can be effectively reduced, and the maintenance cycle of the entire device can be effectively prolonged during operation, the intermediate loss of disassembly and lubrication can be reduced, the speed of adding lubricant in the internal part can be reflected by means of the residual amount monitoring module 36, when the adding speed changes, timely maintenance and repair can be carried out, the situation of internal wear and tear can be timely fed back, and the economic loss caused by continuous wear and tear can be reduced.

[0040] As shown in Figure 7 and Figure 9 The butt joint hole 41 is provided with a transmission shaft 42 at the bottom, the transmission shaft 42 is provided with a hollow groove 46 at the bottom, the hollow groove 46 is externally provided with a conduction groove, the butt joint seat 4 is provided with an annular groove at the bottom, and the annular groove is used to store the lubricant, the position of the conduction groove at the bottom of the transmission shaft 42 can reciprocally insert into the annular groove under the action of external force, the transmission shaft 42 is internally provided with a plurality of drainage grooves 461, the drainage grooves 461 are used to guide the lubricant to the top of the transmission shaft 42, and are used to lubricate the transmission components in the bearing chamber 2;

[0041] The transmission shaft 42 is provided with a narrowed position of the outer diameter of the hollow groove 46 and is externally sleeved with a clamping spring for pushing the transmission shaft 42 to reset. The arc-shaped protrusion at the bottom of the transmission ring frame 22 continuously extrudes the top of the transmission shaft 42, which can drive the transmission shaft 42 to reciprocate, inserts the bottom hollow groove 46 into the ring groove, and can transport the lubricant into the hollow groove 46 and the liquid discharge groove 461 under the action of the external air pressure device, so that the quantitative lubricant can be discharged along the top of the transmission shaft 42, the contact end can be lubricated, and the lubricant loss in the continuous operation process can be supplemented.

[0042] As shown in Figure 7 , Figure 8 and Figure 9 , the transmission shaft 42 is provided with an interface ring groove 421 on the surface, which is communicated with one side of the liquid discharge groove 461, and is used for pouring lubricant outside the transmission shaft 42 to reduce the situation of continuous operation jam. In the transmission process, a part of the lubricant can be guided out along the interface ring groove 421, and the loss of the transmission shaft 42 in the continuous motion process can be reduced.

[0043] The transmission frame 44 is clamped in the interface hole 41, the transmission groove in a wave shape is formed in the transmission frame 44, the fixed clamping block 45 is connected in the interface ring groove 421, the transmission protrusion is arranged at the outer end of the fixed clamping block 45 and is clamped in the transmission groove, which is used for rotating the transmission shaft 42 in the reciprocating process, the sealing washer 43 is arranged at the top of the interface hole 41 and is attached to the outside of the transmission shaft 42. In the reciprocating process of the transmission shaft 42, the transmission shaft 42 can be driven to rotate under the cooperation of the transmission groove in the transmission frame 44 and the fixed clamping block 45. A plurality of arc-shaped grooves can be clamped on the outer wall of the transmission shaft 42, which is used for driving the lubricant to flow in a fixed range and reducing the accidental situation of local omission.

[0044] As shown in Figure 3 , the storage box 3 is provided with a circular groove at the connection with the volute 1, the hollow pipe 31 is arranged in the circular groove, the delivery pipe 33 is arranged in the hollow pipe 31, the delivery disc 35 is arranged at the top end of the delivery pipe 33, the interface shaft is arranged at the interface of the volute 1 and is used for abutting against the liquid discharge hole at the top of the delivery disc 35.

[0045] The one-way air inlet pipe is arranged outside the storage box 3 and is used for connecting the external air pressure device to guide the internal lubricant out of the storage box 3. The lubricant can be conducted into the ring groove in the interface seat 4 under the action of the external air pressure device, and the lubricant can be replaced in time. Compared with the traditional disassembly and replacement, the time for shutdown maintenance can be saved.

[0046] As shown in Figure 3 and Figure 4As shown, the hollow tube 31 is internally provided with a plurality of compression shafts 32 abutting against the edge of the conveying disc 35 for compressing the elastic channel inside to play a sealing role. The conveying disc 35 is provided with a limiting spring 34 between the bottom of the circular groove, which facilitates subsequent disassembly and reduces the leakage condition. When the rear storage box 3 is disassembled and installed, the conveying disc 35 can abut against one end of the hollow tube 31 without the cooperation of the butt joint pipe. By means of the elastic channel of the compression shaft 32 abutting against the edge of the conveying disc 35, the inside can be deformed and sealed, reducing the leakage of the lubricant inside due to the angle problem during installation, and facilitating subsequent maintenance.

[0047] As shown in Figure 5 , the remaining amount 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 amount and transmission speed, and display the data on the digital display screen in cooperation with the processor. With the help of the remaining amount monitoring module 36, the internal lubricant conveying speed can be fed back, and the internal operating state can be known according to the feedback of the data. When the lubricant conveying speed is reduced, the conveying components on the surface inside are worn out, and when the lubricant replenishment speed is reduced to a certain extent, the audible and visual alarm can be used as a reminder to stop maintenance in time. The pressure of the external air pressure equipment can also be controlled by data feedback, the corresponding lubricant replenishment efficiency can be maintained in the case of local replenishment mechanism blockage, the equipment can be ensured to operate normally for a short time, and emergency treatment can be used.

[0048] As shown in Figure 2 , the bearing chamber 2 is externally provided with a wind guide mechanism composed of a connecting frame 21 and a plurality of wind guide blades 23. The connecting frame 21 is arranged on the outer wall of the bearing chamber 2, and the wind guide blades 23 are arranged in a uniform array outside the connecting frame 21.

[0049] As shown in Figure 10 , a plurality of arc-shaped grooves are formed in the inner wall of the bearing chamber 2, and a magnetic plate 24 is arranged inside the arc-shaped grooves. A transmission ring frame 22 is installed inside the bearing chamber 2, and the position of the transmission ring frame 22 corresponds to the butt joint seat 4. A plurality of arc-shaped protrusions are arranged on the bottom of the transmission ring frame 22. The arc-shaped protrusions on the bottom of the transmission ring frame 22 continuously extrude the top of the transmission shaft 42, which can drive the transmission shaft 42 to reciprocate, thereby playing a driving role.

[0050] As shown in Figure 6 and Figure 10 , a plurality of fixed grooves are arranged outside the butt joint bearing 5, and a clamping magnetic block 51 is arranged inside the fixed groove. The clamping magnetic block 51 is used in cooperation with the magnetic plate 24 to reduce the deviation of the bearing chamber 2. With the cooperation of the clamping magnetic block 51 and the magnetic plate 24, the unstable accident during operation can be reduced, and the wear and noise during equipment operation can be reduced.

[0051] Working principle: first, in the process of fan assembly operation, the lubricant can be delivered to the bearing chamber 2 inside with the help of external air pressure equipment, which can effectively reduce the internal wear and tear, and can effectively prolong the maintenance cycle of the whole equipment during operation, and can reduce the disassembly and lubrication of the intermediate loss of working hours, with the help of the excess monitoring module 36, the internal lubricant adding speed can be reflected, when the adding speed changes, timely maintenance and repair can be carried out, timely feedback of internal wear and tear can be obtained, and economic loss caused by continuous wear and tear can be reduced, and with the process of fan assembly operation, the bearing chamber 2 can move in a circle, the arc-shaped protrusion at the bottom of the transmission ring frame 22 can continuously extrude the top of the transmission shaft 42, which can drive the transmission shaft 42 to reciprocate, and the bottom hollow slot 46 can be inserted into the ring slot, which can deliver the lubricant to the hollow slot 46 and the drainage groove 461 under the action of external air pressure equipment, which can discharge the lubricant on the top of the transmission shaft 42, which can lubricate the contact end, which can supplement the lubricant loss in the process of continuous operation, and the lubricant can be discharged along the butt joint ring slot 421 in the process of transmission, which can also reduce the loss of transmission shaft 42 in the process of continuous movement;

[0052] Then, in the process of reciprocating movement of the transmission shaft 42, the transmission shaft 42 can be driven to rotate under the cooperation of the transmission groove in the transmission frame 44 and the fixed clamping block 45, and a plurality of arc-shaped grooves can be arranged on the outer wall of the transmission shaft 42 to drive the lubricant to flow within a fixed range, which can reduce the accidental omission of local parts, and with the cooperation of the clamping magnetic block 51 and the magnetic plate 24, the deviation during operation can be reduced, and the wear and tear during internal operation can be reduced;

[0053] Finally, with the help of the excess monitoring module 36, the internal lubricant delivery speed can be fed back, and the internal running state can be known according to the feedback of the data, when the lubricant delivery speed is reduced, the wear and tear of the internal conveying parts occurs, and when the lubricant supplement speed is reduced to a certain extent, the sound and light alarm can play a reminding role, timely maintenance and repair can be carried out, and the internal lubricant leakage caused by angle problem during installation can be reduced, which is convenient for subsequent maintenance.

[0054] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An outer rotor motor assembly for a low noise cross flow fan, characterized by: Include, The volute (1) is internally provided with a butt joint bearing (5), the butt joint bearing (5) is externally provided with a butt joint seat (4), the butt joint bearing (5) and the butt joint seat (4) are provided with a bearing chamber (2) at the top, the bearing chamber (2) is externally provided with a wind guide assembly, the volute (1) is externally provided with a storage box (3), the storage box (3) is internally provided with a lubricant, the volute (1) is internally provided with a plurality of transmission channels, and the transmission channels are used to pass through the storage box (3) and the butt joint seat (4); Wherein, the butt joint seat (4) is internally provided with a plurality of butt joint holes (41), the butt joint hole (41) is used for conveying lubricant, the assembly in the bearing chamber (2) can be oiled and lubricated, and the situation of jamming is reduced, the storage box (3) is externally provided with a residual amount monitoring module (36) for monitoring the residual amount and use speed of the lubricant.

2. A low noise external rotor motor assembly for a cross flow fan according to claim 1, characterized in that: The butt joint hole (41) is inserted with a transmission shaft (42), the transmission shaft (42) is provided with a hollow groove (46) at the bottom, the hollow groove (46) is externally provided with a conducting groove, the butt joint seat (4) is provided with an annular groove at the bottom, and the annular groove is used for storing lubricant, the position of the transmission shaft (42) provided with the conducting groove can be reciprocally inserted into the annular groove under the action of external force, the transmission shaft (42) is internally provided with a plurality of drainage grooves (461), the drainage grooves (461) are used for guiding the lubricant to the top of the transmission shaft (42), and the transmission assembly in the bearing chamber (2) is subjected to lubricating treatment; The position of the transmission shaft (42) provided with the hollow groove (46) is narrowed in outer diameter and externally provided with a clamping spring for pushing the transmission shaft (42) to reset.

3. A low noise external rotor motor assembly for a cross flow fan according to claim 2, characterized in that: The transmission shaft (42) is provided with a butt joint ring groove (421) on the surface, the butt joint ring groove (421) is communicated with one side of the drainage groove (461), and the lubricant is poured into the outside of the transmission shaft (42), so as to reduce the situation of jamming during continuous operation; The butt joint hole (41) is internally provided with a transmission frame (44), the transmission frame (44) is internally provided with a transmission groove in a wave shape, the butt joint ring groove (421) is internally connected with a fixed clamping block (45), the fixed clamping block (45) is externally provided with a transmission protrusion, the transmission protrusion is clamped in the transmission groove, and the transmission shaft (42) is rotated in the reciprocating movement process, and the butt joint hole (41) is provided with a sealing washer (43) at the top, and the sealing washer (43) is attached to the outside of the transmission shaft (42).

4. A low noise external rotor motor assembly for a cross flow fan according to claim 1, characterized in that: The storage box (3) and the volute (1) are connected with a circular groove, and the circular groove is internally provided with a hollow pipe (31), the hollow pipe (31) is internally provided with a conveying pipe (33), the conveying pipe (33) is provided with a conveying disc (35) at the top, the volute (1) is provided with a butt joint shaft at the butt joint, and the butt joint shaft is used for abutting against the drainage hole at the top of the conveying disc (35); The storage box (3) is externally provided with a one-way air inlet pipe for connecting the external air pressure setting and guiding the internal lubricant out.

5. A low noise external rotor motor assembly for a cross flow fan according to claim 4, characterized in that: The hollow pipe (31) is internally provided with a plurality of compression shafts (32) abutting on the edge of a conveying disc (35) for compressing the elastic channel inside to play a sealing role, the conveying disc (35) is provided with a limiting spring (34) between the bottom of the circular groove, so as to facilitate subsequent disassembly and reduce the leakage condition.

6. A low noise external rotor motor assembly for a crossflow fan according to claim 1, characterized in that: The residual monitoring module (36) comprises a digital display screen, an audible and visual alarm, a liquid level sensor and a processor, the liquid level sensor can detect the internal residual amount and transmission speed, and the processor is used for displaying data on the digital display screen.

7. A low noise external rotor motor assembly for a crossflow fan according to claim 1, wherein: The bearing chamber (2) is externally provided with an air guide mechanism composed of a connecting frame (21) and a plurality of air guide blades (23), the connecting frame (21) is arranged on the outer wall of the bearing chamber (2), and the air guide blades (23) are arranged in a uniform array on the outside of the connecting frame (21).

8. A low noise external rotor motor assembly for a crossflow fan according to claim 1, characterized in that: A plurality of arc-shaped grooves are formed in the inner wall of the bearing chamber (2), and a magnetic plate (24) is arranged in the arc-shaped grooves, a transmission ring frame (22) is mounted in the bearing chamber (2), the position of the transmission ring frame (22) corresponds to the butt joint seat (4), and a plurality of arc-shaped protrusions are arranged on the bottom of the transmission ring frame (22).

9. A low noise external rotor motor assembly for a crossflow fan according to claim 1, characterized in that: The butt joint bearing (5) is externally provided with a plurality of fixing grooves, and a clamping magnetic block (51) is arranged in the fixing grooves, which is used for cooperating with the magnetic plate (24) to reduce the deviation of the bearing chamber (2).

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