Cross-flow fan and air conditioner indoor unit comprising the same

Abstract

The present application relates to a cross-flow fan and an air conditioner indoor unit comprising the same. The cross-flow fan comprises a bearing assembly and an impeller having a first end cover close to the bearing assembly, wherein a detachable rotating shaft is arranged on the first end cover, the rotating shaft is matched with the bearing assembly and is configured to be movable along a longitudinal center line of the impeller to be detached from the bearing assembly or the first end cover. The cross-flow fan of the present application sets the rotating shaft and the first end cover in a detachable structure, which can conveniently release the connection between the impeller and the bearing assembly, so that the impeller can be detached without disassembling the bearing assembly, and the installation and disassembly of the impeller are facilitated.

Description

Technical Field

[0001] This invention relates to the field of air conditioning, and more specifically to a cross-flow fan and an indoor air conditioning unit including the cross-flow fan. Background Technology

[0002] After prolonged use, air conditioners accumulate a lot of dust on the surface of the cross-flow fan impeller. The bacteria that thrive in this dust can pollute the air blown into the room, affecting the user's health. Therefore, it is necessary to regularly remove the impeller from the air conditioner and clean it.

[0003] Existing cross-flow fans often use a bearing assembly in conjunction with a motor, suspended above the impeller to allow the impeller to rotate. The bearing assembly is mounted on the frame of the indoor unit, and a shaft that mates with the bearing assembly is located on the impeller. For example, Chinese invention patent CN111780251B discloses an indoor unit where the bearing assembly is mounted on the lower frame of the indoor unit with screws, and a shaft extending into the bearing assembly is located on the end of the impeller near the bearing assembly. When disassembling the impeller of this type of indoor unit, the bearing assembly must be removed along with the impeller, a time-consuming and labor-intensive process.

[0004] Therefore, a new technical solution is needed in this field to solve the above problems. Summary of the Invention

[0005] To improve or solve the technical problem in the prior art where the bearing assembly needs to be removed along with the impeller when disassembling the impeller, the present invention provides a cross-flow fan. The cross-flow fan includes: a bearing assembly; and an impeller, the impeller having a first end cover near the bearing assembly, a detachable shaft being disposed on the first end cover, the shaft being mated with the bearing assembly and configured to be movable along the longitudinal centerline of the impeller to disengage from the bearing assembly or the first end cover.

[0006] The cross-flow fan of this invention includes a bearing assembly and an impeller. The bearing assembly is suitable for mounting on the frame of an indoor air conditioning unit. The impeller has a first end cover and a detachable rotating shaft is disposed on the first end cover. The rotating shaft is fitted with the bearing assembly and can move closer to or further away from the bearing assembly along the longitudinal centerline of the impeller. When it is necessary to disassemble the impeller, simply remove the rotating shaft from the first end cover and move the shaft until it is disengaged from the bearing assembly or from the first end cover to release the connection between the impeller and the bearing assembly, thereby removing the impeller without disassembling the bearing assembly. Through the above-described configuration, the cross-flow fan of this invention provides a detachable structure between the rotating shaft and the first end cover, which facilitates the disengagement of the impeller from the bearing assembly, thus allowing for easy installation and removal of the impeller.

[0007] In a preferred embodiment of the cross-flow fan of the present invention, a shaft seat and a first through hole are formed on the first end cover. The shaft seat is detachably connected to the shaft and has a receiving groove for accommodating the shaft, and the shaft extends into the first through hole. Through the above arrangement, the shaft seat and the shaft are detachably connected for fixing the shaft; the shaft extending into the first through hole facilitates the shaft's disengagement from the bearing assembly and insertion into the impeller, thereby facilitating impeller disassembly.

[0008] In a preferred embodiment of the cross-flow fan of the present invention, the shaft seat is configured to extend from the first end cover into the impeller along the longitudinal centerline of the impeller. This arrangement, with the shaft seat extending from the first end cover into the impeller, allows the first end cover to fit snugly against the end of the air duct of the indoor air conditioning unit, thereby increasing the working area and airflow of the impeller.

[0009] In a preferred embodiment of the cross-flow fan of the present invention, the rotating shaft has a connecting end facing the impeller, and a first positioning plane is provided on the connecting end; a first threaded hole is formed on the circumferential wall of the rotating shaft seat, and a first set screw that matches the first threaded hole and abuts against the first positioning plane is provided in the first threaded hole. Through the above arrangement, the first positioning plane is located on the connecting end of the rotating shaft and abuts against the first set screw, which can prevent relative rotation between the rotating shaft and the rotating shaft seat. At the same time, the rotating shaft and the rotating shaft seat are connected by the first set screw, which can facilitate the fixing and disassembly of the rotating shaft and the rotating shaft seat, thereby facilitating the installation and disassembly of the impeller.

[0010] In a preferred embodiment of the cross-flow fan of the present invention, a disassembly gap is provided between the first end cover and the bearing assembly. This disassembly gap facilitates the movement of the rotating shaft, allowing it to disengage from the bearing assembly or the first end cover.

[0011] In a preferred embodiment of the cross-flow fan of the present invention, the cross-flow fan further includes a motor; the impeller further includes a second end cover opposite to the first end cover, and a bushing is provided on the second end cover to form a detachable connection with the motor shaft of the motor. A clearance groove is provided on the bushing, and the clearance groove is configured to allow the motor shaft to tilt relative to the bushing after it has been partially pulled out of the bushing. With the above configuration, the motor is adapted to be fixed on the other end of the frame away from the bearing assembly. The bushing and the motor shaft form a detachable connection so that the impeller can be removed from the indoor unit of the air conditioner without disassembling the motor. After the motor shaft has been partially pulled out of the bushing, the clearance groove allows the motor shaft to tilt relative to the bushing so that the impeller can be tilted out of the duct, thereby reducing the clearance required for impeller movement in the duct. When the cross-flow fan is operating normally, the bearing assembly, impeller, and motor form a rigid connection, and the motor drives the motor shaft to rotate, thereby driving the bushing and impeller to rotate. When the impeller needs to be removed from the indoor unit of the air conditioner, simply move the rotating shaft into the impeller to disconnect the connection between the impeller and the bearing assembly. Then, move the impeller along its length to pull the motor shaft out of the bushing. Next, lift the first end cover and pull it out of the air duct. Finally, pull the impeller away from the motor to completely detach the motor shaft from the bushing. This invention's cross-flow fan not only allows the impeller to be removed without disassembling the bearing assembly but also allows the motor shaft to be pulled out of the bushing at an angle, thus preserving as much of the impeller's working area and airflow as possible.

[0012] In a preferred embodiment of the cross-flow fan of the present invention, the bushing is configured to extend from the second end cover into the impeller along the longitudinal centerline of the impeller. A clearance groove is formed on the end of the bushing that connects to the second end cover, and an auxiliary clearance groove communicating with the clearance groove is provided on the second end cover. Through this arrangement, the bushing extends from the second end cover into the impeller, allowing the second end cover to be closer to the end of the air duct, thereby increasing the working area and airflow of the impeller. Simultaneously, the clearance groove on the bushing and the auxiliary clearance groove on the second end cover provide a larger space for the motor shaft to move when the extended end of the motor shaft is located within the clearance groove, allowing the motor shaft to tilt relative to the bushing.

[0013] In a preferred embodiment of the cross-flow fan of the present invention, a second positioning plane is provided on the extended end of the motor shaft; a second threaded hole is provided on the circumferential wall of the bushing, and a second set screw, which mates with the second threaded hole and abuts against the second positioning plane at one end, is provided in the second threaded hole. Through the above arrangement, the second positioning plane is located at the end of the motor shaft and abuts against the second set screw, preventing relative rotation between the motor shaft and the bushing. Simultaneously, the connection between the motor shaft and the bushing via the second set screw facilitates the connection and disassembly of the motor shaft and the bushing, thereby facilitating the installation and disassembly of the impeller.

[0014] In a preferred embodiment of the cross-flow fan of the present invention, the second threaded hole is arranged at the end of the bushing away from the second end cover, and the second threaded hole is connected to the clearance groove. With the above arrangement, the clearance groove is connected to the second threaded hole, making it easier to observe the position of the second positioning plane after the motor shaft extends into the bushing, so that the second positioning plane is positioned to the position of the second threaded hole, thereby facilitating the connection between the motor shaft and the bushing.

[0015] To address the aforementioned technical problems, the present invention also discloses an air conditioning indoor unit, comprising: a frame, within which a duct extending longitudinally along the frame is formed; and a cross-flow fan according to any one of the preceding claims, the cross-flow fan being mounted on the frame and the impeller of the cross-flow fan being located in the duct. By employing the cross-flow fan according to any one of the preceding claims, the present invention allows for relatively convenient disconnection between the impeller and the bearing assembly, thereby enabling the impeller to be removed without disassembling the bearing assembly, facilitating impeller disassembly.

[0016] In a preferred embodiment of the indoor unit of the air conditioner of the present invention, the air duct has a first end plate and a second end plate opposite to each other, and the impeller is arranged between the first end plate and the second end plate. With the above arrangement, the first end plate and the second end plate, serving as the end plates at both ends of the air duct, can prevent the impeller from slipping out of the air duct.

[0017] In a preferred embodiment of the indoor unit of the air conditioner of the present invention, the frame has a frame base extending between its opposite first and second ends, and a duct frame detachably connected to the frame base, the duct being formed in the duct frame; the motor of the cross-flow fan is mounted on the frame base at the first end, and the bearing assembly of the cross-flow fan is engaged with the frame base and inserted into the duct frame at the second end. The duct frame is generally located below the impeller, and therefore tends to accumulate dust. Through the above arrangement, the bearing assembly engages with the frame base and inserts into the duct frame, which not only improves the installation stability of the bearing assembly and the frame, but also enhances the connection stability between the duct frame and the frame base. The duct frame is detachably connected to the frame base, allowing the duct frame to be removed from the frame base for cleaning, preventing air pollution.

[0018] Option 1. A cross-flow fan, the cross-flow fan comprising: a bearing assembly; and an impeller having a first end cap near the bearing assembly, wherein a detachable shaft is disposed on the first end cap, the shaft being mated with the bearing assembly and configured to be movable along the longitudinal centerline of the impeller to disengage from the bearing assembly or the first end cap.

[0019] Option 2. According to the cross-flow fan described in Option 1, a shaft seat and a first through hole are formed on the first end cover. The shaft seat is detachably connected to the shaft and has a receiving groove for accommodating the shaft. The shaft extends into the first through hole.

[0020] Option 3. According to Option 2, the cross-flow fan is configured such that the shaft seat extends from the first end cover into the impeller along the longitudinal centerline of the impeller.

[0021] Option 4. According to the cross-flow fan described in Option 2, the rotating shaft has a connecting end facing the impeller, and a first positioning plane is provided on the connecting end; a first threaded hole is provided on the circumferential wall of the rotating shaft seat, and a first set screw that matches the first threaded hole and whose one end abuts against the first positioning plane is provided in the first threaded hole.

[0022] Option 5. According to the cross-flow fan described in Option 1, a disassembly gap is reserved between the first end cover and the bearing assembly.

[0023] Option 6. The cross-flow fan according to any one of Options 1-5, wherein the cross-flow fan further includes a motor; the impeller further includes a second end cover opposite to the first end cover, and a bushing is provided on the second end cover to form a detachable connection with the motor shaft of the motor, the bushing is provided with a clearance groove, and the clearance groove is configured to allow the motor shaft to tilt relative to the bushing after the motor shaft is partially pulled out of the bushing.

[0024] Option 7. According to the cross-flow fan described in Option 6, the bushing is configured to extend from the second end cover into the impeller along the longitudinal centerline of the impeller, the clearance groove is provided on the end of the bushing that connects with the second end cover, and an auxiliary clearance groove communicating with the clearance groove is provided on the second end cover.

[0025] Option 8. According to the cross-flow fan described in Option 6, a second positioning plane is provided on the shaft extension end of the motor shaft; a second threaded hole is provided on the circumferential wall of the bushing, and a second set screw that matches the second threaded hole and whose one end abuts against the second positioning plane is provided in the second threaded hole.

[0026] Option 9. According to Option 8, the second threaded hole is arranged at the end of the bushing away from the second end cover, and the second threaded hole is connected to the clearance groove.

[0027] Option 10. An air conditioning indoor unit, the air conditioning indoor unit comprising: a frame, wherein an air duct extending longitudinally along the frame is formed therein; and a cross-flow fan according to any one of Options 1-9, the cross-flow fan being mounted on the frame and the impeller of the cross-flow fan being located in the air duct.

[0028] Option 11. The indoor unit of the air conditioner according to Option 10, wherein the air duct has opposing first end plates and second end plates, and the impeller is arranged between the first end plate and the second end plate.

[0029] Option 12. The air conditioning indoor unit according to Option 10, wherein the frame has a frame base extending between its opposite first end and second end and a duct frame detachably connected to the frame base, the duct being formed in the duct frame; the motor of the cross-flow fan is mounted on the frame base at the first end, and the bearing assembly of the cross-flow fan is engaged with the frame base at the second end and inserted into the duct frame. Attached Figure Description

[0030] The preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

[0031] Figure 1This is a schematic diagram of the overall structure of an embodiment of the indoor unit of the air conditioner of the present invention;

[0032] Figure 2 This is an exploded structural diagram of an embodiment of the indoor unit of the air conditioner of the present invention;

[0033] Figure 3 This is a schematic diagram of an embodiment of the first end cover in the cross-flow fan of the present invention.

[0034] Figure 4 This is an exploded structural diagram of the motor and the second end cover in the first embodiment of the cross-flow fan of the present invention;

[0035] Figure 5 This is an exploded structural diagram of an embodiment of the frame at the first end of the indoor unit of the air conditioner of the present invention;

[0036] Figure 6 This is another exploded structural diagram of an embodiment of the first end of the frame in the indoor unit of the air conditioner of the present invention;

[0037] Figure 7 This is a third exploded structural diagram of an embodiment of the frame at the first end of the indoor unit of the air conditioner of the present invention;

[0038] Figure 8 This is a schematic diagram of another embodiment of the second end cover in the cross-flow fan of the present invention.

[0039] List of reference numerals in the attached diagram:

[0040] 100. Indoor unit of air conditioner.

[0041] 1. Frame; 11. First end; 12. Second end; 13. Frame base; 131. Motor mounting base; 132. First half of the third end plate; 1321. Snap-fit ​​groove; 14. Air duct frame; 141. Second half of the third end plate; 1411. Support plate; 15. Air duct; 151. First end plate; 1511. First half of the first end plate; 15111. First positioning groove; 15112. First insertion frame; 151121. First support arm; 1511 22. Second arm; 151123. Lock hole; 1512. Second half of the first end plate; 15121. Second positioning groove; 15122. Second insertion frame; 152. Second end plate; 2. Cross-flow fan; 21. Bearing assembly; 211. Bearing; 2111. Snap ring; 212. Bearing seat; 2121. Body; 21211. First side; 21212. Second side; 2122. Limiting plate; 21221. First ring limiting plate; 21222 2123. Second ring limiting plate; 2123. Mounting plate; 21231. First mounting plate; 21232. Locking block; 21233. First positioning plate; 21234. Second positioning plate; 21235. Connecting plate; 21236. First insertion plate; 21237. Second insertion plate; 21238. Hook; 22. Motor; 221. Motor shaft; 222. Shaft extension end; 223. Second positioning plane; 23. Impeller; 231. First end cover; 231 1. Shaft seat; 23111. Receiving groove; 23112. First threaded hole; 2312. Shaft; 23121. Connecting end; 23122. First positioning plane; 2313. First through hole; 232. Second end cover; 2321. Bushing; 23211. Second threaded hole; 23212. Second set screw; 23213. Clearance groove; 2322. Auxiliary clearance groove; 2323. Second through hole; 233. Fan blade; 234. Disassembly clearance. Detailed Implementation

[0042] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0043] It should be noted that in the description of this invention, terms such as "upper," "lower," "left," "right," "inner," and "outer," indicating directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0044] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0045] To improve or solve the technical problem in the prior art that the bearing assembly needs to be removed together when disassembling the impeller, the present invention provides a cross-flow fan 2, which includes: a bearing assembly 21; and an impeller 23. The impeller 23 has a first end cover 231 near the bearing assembly 21. A detachable rotating shaft 2312 is provided on the first end cover 231. The rotating shaft 2312 is matched with the bearing assembly 21 and configured to be movable along the longitudinal centerline of the impeller 23 to disengage from the bearing assembly 21 or the first end cover 231.

[0046] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the indoor unit of the air conditioner of the present invention. Figure 2 This is an exploded structural diagram of an embodiment of the indoor unit of the air conditioner of the present invention. (See diagram below.) Figure 1 and Figure 2 As shown, in one or more embodiments, the cross-flow fan 2 includes a bearing assembly 21, a motor 22 and an impeller 23, with the bearing assembly 21 and the motor 22 respectively arranged at two opposite ends of the impeller 23.

[0047] Figure 3 This is a schematic diagram of the structure of an embodiment of the first end cover in the cross-flow fan of the present invention. (See diagram below.) Figure 2 and Figure 3 As shown, in one or more embodiments, the impeller 23 includes a blade 233, a first end cap 231, and a second end cap 232, with the blade 233 extending between the first end cap 231 and the second end cap 232 and along the longitudinal centerline of the impeller 23. Based on Figure 2 As shown, the first end cap 231 is the left end cap, located at the first end of the impeller 23; the second end cap 232 is the right end cap, located at the second end of the impeller 23 opposite to the first end. In one or more embodiments, both the first end cap 231 and the second end cap 232 are generally circular. Alternatively, the first end cap 231 and the second end cap 232 may be configured in other suitable shapes.

[0048] See Figure 3A shaft seat 2311 and a first through hole 2313 are provided on the first end cover 231. In one or more embodiments, the shaft seat 2311 extends into the impeller 23 along the longitudinal centerline of the impeller 23 through the first through hole 2313 of the first end cover 231. Alternatively, the shaft 2312 extends into the bearing assembly 21 along the longitudinal centerline of the impeller 23 from the first through hole 2313 of the first end cover 231. In one or more embodiments, a receiving groove 23111 is formed in the shaft seat 2311, and a first threaded hole 23112 is provided on the circumferential wall of the shaft seat 2311. The first threaded hole 23112 extends radially along the shaft seat 2311 and is positioned near the middle of the shaft seat 2311. The first threaded hole 23112 is used to mate with a first set screw. Alternatively, the first threaded hole 23112 may also be provided in other suitable locations.

[0049] See Figure 3 In one or more embodiments, a rotating shaft 2312 is disposed within a receiving groove 23111 of a rotating shaft seat 2311. The rotating shaft 2312 is generally cylindrical and extends along the longitudinal centerline of the impeller 23. In one or more embodiments, the rotating shaft 2312 has a connecting end 23121 facing the impeller 23. The connecting end 23121 extends into the receiving groove 23111 of the rotating shaft seat 2311 through a first through hole 2313 of the first end cover 231, and a portion of the connecting end 23121 extends out of the rotating shaft seat 2311. A first positioning plane 23122 is provided on the connecting end 23121. When the rotating shaft 2312 extends into the rotating shaft seat 2311, one end of a first set screw passes through the first threaded hole 23112 and abuts against the first positioning plane 23122 of the rotating shaft 2312.

[0050] Figure 4 This is an exploded structural diagram of the motor and the second end cover in the first embodiment of the cross-flow fan of the present invention. Figure 4 As shown, a bushing 2321 and a second through hole 2323 are provided on the second end cover 232. In one or more embodiments, the bushing 2321 extends into the impeller 23 through the second through hole 2323 of the second end cover 232 along the longitudinal centerline of the impeller 23. In one or more embodiments, a second threaded hole 23211 is provided on the circumferential wall of the bushing 2321, extending radially along the bushing 2321 and positioned near the middle of the bushing 2321. The second threaded hole 23211 is used to mate with a second set screw 23212. Alternatively, the second threaded hole 23211 may also be provided in other suitable locations.

[0051] See also Figure 4 In one or more embodiments, a clearance groove 23213 is provided on the end of the bushing 2321 that connects with the second end cover 232. Based on Figure 4As shown in the diagram, the right end of the bushing 2321 is connected to the second end cap 232. An auxiliary clearance groove 2322 is also provided on the second end cap 232, which connects to the second through hole 2323 of the second end cap 232 and extends radially outward along the second end cap 232. The clearance groove 23213 extends along the length of the bushing 2321 to the second end cap 232 and communicates with the auxiliary clearance groove 2322. In one or more embodiments, the clearance groove 23213 extends from the threaded hole 23211 to the second end cap 232.

[0052] See Figure 2 and Figure 4 In the assembled state, the motor 22 is located at the second end of the impeller 23, near the second end cover 232. For example... Figure 4 As shown, the motor 22 has a motor shaft 221 that extends toward the impeller 23 through a second through hole 2323 on the second end cover 232. In one or more embodiments, the motor shaft 221 is generally cylindrical, and a second positioning plane 223 is provided on the shaft extension end 222 of the motor shaft 221. Alternatively, the motor shaft 221 may be configured in other suitable shapes, such as a cuboid. When the motor shaft 221 extends into the bushing 2321, one end of the second set screw 23212 passes through the second threaded hole 23211 and abuts against the second positioning plane 223 of the motor shaft 221.

[0053] Figure 5 This is an exploded structural diagram of an embodiment of the frame of the indoor unit of the air conditioner of the present invention. Figure 5 As shown, in the assembled state, the bearing assembly 21 is located at the first end of the impeller 23, close to the first end cover 231. The bearing assembly 21 shares a centerline with the motor shaft 221, the second end cover 232, the bushing 2321, the first end cover 231, and the rotating shaft 2312. In one or more embodiments, a disassembly gap 234 is provided between the first end cover 231 and the bearing assembly 21. Due to the existence of the disassembly gap 234, the rotating shaft 2312 can be moved into the impeller 23 first to disconnect the connection between the first end cover 231 and the bearing assembly 21; then the impeller 23 can be moved towards the bearing assembly 21, and the clearance groove 23213 can move with the bushing 2321, thereby pulling out a portion of the motor shaft 221 from the bushing 2321. When the bushing 2321 moves until the shaft extension end 222 of the motor shaft 221 is located within the clearance groove 23213, the bushing 2321 allows the motor shaft 221 to tilt relative to the bushing 2321. At this point, pull the first end cover 231 outwards to remove it from the indoor unit of the air conditioner. Finally, pull the impeller 23 to the left to remove it from the indoor unit of the air conditioner.

[0054] See also Figure 5The bearing assembly 21 includes a bearing housing 212 and a bearing 211, with the bearing 211 disposed within the bearing housing 212. In one or more embodiments, a retaining ring 2111 is provided on the outer peripheral surface of the bearing 211 to engage the bearing 211 within the bearing housing 212.

[0055] Figure 6 This is another exploded structural diagram of an embodiment of the frame at the first end of the indoor unit of the air conditioner according to the present invention. (See attached diagram.) Figure 5 and Figure 6 As shown, the bearing housing 212 includes a body 2121, a limiting plate 2122, and a mounting plate 2123. In one or more embodiments, the body 2121 is generally cylindrical and has opposing first sides 21211 and second sides 21212. Alternatively, the body 2121 may also be configured in other suitable shapes. Figure 5 In the orientation shown, the first side 21211 is on the left and faces away from the impeller 23; the second side 21212 is on the right and faces the impeller 23. In one or more embodiments, the limiting plate 2122 is arranged on the inner circumferential surface of the body 2121. The limiting plate 2122 includes a first ring of limiting plates 21221 and a second ring of limiting plates 21222 spaced apart along the length direction of the body 2121. The retaining ring 2111 of the bearing 211 is arranged between the first ring of limiting plates 21221 and the second ring of limiting plates 21222. In one or more embodiments, three first rings of limiting plates 21221 and three second rings of limiting plates 21222 are evenly and spaced apart along the circumference of the body 2121, and the first rings of limiting plates 21221 and the second rings of limiting plates 21222 are staggered. Alternatively, two, four, or other suitable quantities of first rings of limiting plates 21221 and two rings of limiting plates 21222 can be provided.

[0056] Figure 7 This is a third exploded structural diagram of an embodiment of the frame at the first end of the indoor unit of the air conditioner of the present invention. (See diagram below.) Figure 6 and Figure 7 As shown, mounting plate 2123 is disposed on the outer peripheral surface of body 2121. In one or more embodiments, mounting plate 2123 includes a first mounting plate 21231 positioned close to a first side 21211 of body 2121, the first mounting plate 21231 extending outward from body 2121. Based on Figure 6 As shown in the diagram, the first mounting plate 21231 extends inward into the paper. Alternatively, the first mounting plate 21231 may extend in other suitable directions. In one or more embodiments, a locking block 21232 is provided at the end of the first mounting plate 21231 away from the body 2121 so that the body 2121 can engage with the indoor unit of the air conditioner.

[0057] See also Figure 6 and Figure 7In one or more embodiments, the mounting plate 2123 further includes a first positioning plate 21233 and a second positioning plate 21234, so that the body 2121 can be mounted on the indoor unit of the air conditioner. The first positioning plate 21233 and the second positioning plate 21234 are both positioned close to the second side 21212 of the body 2121, and are disposed opposite to each other on the outer peripheral wall of the body 2121. Figure 6 As shown, the first positioning plate 21233 extends radially outward and upward from the outer peripheral wall of the body 2121; the second positioning plate 21234 extends radially outward and downward from the outer axial wall of the body 212, and the extension direction of the second positioning plate 21234 is approximately opposite to the extension direction of the first positioning plate 21233. In one or more embodiments, a connecting plate 21235 is also provided on the outer peripheral wall of the body 2121. The connecting plate 21235 extends from the first positioning plate 21233 to the second positioning plate 21234 along the circumference of the body 2121, and its end extends to the end of the second positioning plate 21234 away from the body 2121, so as to enhance the connection strength of the first positioning plate 21233, the second positioning plate 21234 and the body 2121.

[0058] See also Figure 6 and Figure 7 In one or more embodiments, the mounting plate 2123 further includes a first plug-in plate 21236 and a second plug-in plate 21237. Both the first plug-in plate 21236 and the second plug-in plate 21237 are positioned close to the second side 21212 of the body 2121, with the first plug-in plate 21236 positioned close to the first positioning plate 21233 and the second plug-in plate 21237 positioned close to the second positioning plate 21234. Based on Figure 6 As shown, the first plug-in plate 21236 and the second plug-in plate 21237 are parallel to each other and both extend downwards at an angle to prevent the body 2121 from shaking within the air conditioner indoor unit. In one or more embodiments, a hook 21238 is provided on the end of the first plug-in plate 21236 away from the body 2121. The hook 21238 extends upwards at an angle from the first plug-in plate 21236 so that the first plug-in plate 21236 forms a snap-fit ​​engagement with the air conditioner indoor unit. In one or more embodiments, abutment plates are provided on both the left and right sides of the first plug-in plate 21236 and the second plug-in plate 21237. Figure 5 As shown in the diagram, the abutment plate extends to the left and right sides.

[0059] Figure 8This is a schematic diagram of another embodiment of the second end cover in the cross-flow fan of the present invention. In this embodiment, the bushing 2321 extends outward from the second through hole 2323 of the second end cover 232 toward the motor 22, and the clearance groove 23213 is provided on the end of the bushing 2321 away from the second end cover 232. Therefore, the auxiliary clearance groove 2322 is eliminated. The bushing 2321 extends toward the motor 22, can pass through the end plate on the indoor unit 100 of the air conditioner and connect with the motor shaft 221, so that the second end cover 232 is closer to the end plate on the indoor unit 100 of the air conditioner, thereby increasing the working area and air volume of the impeller 23. In this embodiment, the parts not described are the same as in the above embodiment.

[0060] In order to improve or solve the technical problem that the bearing assembly needs to be removed together when disassembling the impeller in the prior art, the present invention also provides an air conditioner indoor unit 100, which includes a frame 1, an air duct 15 formed in the frame 1; and a cross-flow fan 2 as described above, the cross-flow fan 2 is mounted on the frame 1 and the impeller 23 of the cross-flow fan 2 is located in the air duct 15.

[0061] See Figure 1 In one or more embodiments, the indoor unit 100 of the air conditioner of the present invention includes a frame 1 and a cross-flow fan 2. The cross-flow fan 2 includes a bearing assembly 21, a motor 22, and an impeller 23. The frame 1 has a first end 11 and a second end 12 opposite to each other, and an air duct 15 is formed between the first end 11 and the second end 12. The bearing assembly 21 is mounted on the first end 11, the motor 22 is mounted on the second end 12, and the impeller 23 is arranged within the air duct 15. Figure 1 As shown in the diagram, the first end 11 is the left end of the skeleton 1, and the second end 12 is the right end of the skeleton 1.

[0062] See Figure 2 In one or more embodiments, the frame 1 includes a frame base 13 and a duct frame 14 detachably connected to the frame base 13. The frame base 13 is adapted to be fixed to a wall or other suitable mounting structure. Figure 2 As shown, the duct frame 14 is positioned below the frame base 13. In one or more embodiments, the indoor unit 100 of the air conditioner also includes an evaporator (not shown) mounted on the frame base 13 and located above the duct 15, such that the impeller 23 can only be removed from the duct 15 in a direction facing outwards from the paper. Alternatively, the impeller 23 may also move downwards to detach from the frame base 13 after the duct frame 14 has been removed from the frame base 13. The duct 15 has opposing first end plates 151 and second end plates 152 along its longitudinal centerline. The first end plates 151 and second end plates 152 are formed on the frame base 13 and the duct frame 14.

[0063] See also Figure 2In one or more embodiments, a motor mounting base 131 is provided on the frame base 13 at the second end 12 for mounting the motor 22. Alternatively, the motor mounting base 131 may also be provided on the first end 11 of the frame base 13 or other suitable locations. In one or more embodiments, the motor shaft 221 passes through the second end plate 152 and is connected to the bushing 2321 of the impeller 23.

[0064] See Figure 5 and Figure 6 In one or more embodiments, at the first end 11, a third end plate first half 132 and a first end plate first half 1511, which are relatively parallel, are provided on the frame base 13. Based on Figure 3 As shown in the diagram, the first half 1511 of the first end plate is located to the right of the first half 132 of the third end plate. The body 2121 of the bearing assembly 21 is arranged between the first half 132 of the third end plate and the first half 1511 of the first end plate. In one or more embodiments, a snap-fit ​​groove 1321 is provided on the first half 132 of the third end plate. The snap-fit ​​groove 1321 is located on the side of the first half 132 of the third end plate facing the air duct 15 and matches the shape of the snap-fit ​​block 21232 on the body 2121.

[0065] See also Figure 5 and Figure 6 In one or more embodiments, a first positioning groove 15111 is formed on the first half 1511 of the first end plate. The first positioning groove 15111 matches the shape of the first positioning plate 21233, and the first positioning plate 21233 abuts against the first half 1511 of the first end plate. In one or more embodiments, a first insertion frame 15112 is provided on the first half 1511 of the first end plate. The first insertion frame 15112 is provided on the side of the first half 1511 of the first end plate facing the first half 132 of the third end plate, and matches the shape of the first insertion plate 21236. The first insertion plate 21236 is inserted into the first insertion frame 15112. Based on Figure 4 As shown, the first insertion frame 15112 extends outward from the paper and is slightly inclined upward. Alternatively, the first insertion frame 15112 may also extend in other suitable directions, such as horizontally outward from the paper. In one or more embodiments, the first insertion frame 15112 includes a first arm 151121 and a second arm 151122 connected to the first arm 151121. The first arm 151121 is perpendicular to the body of the first half 1511 of the first end plate. The first arm 151121 is generally rectangular in shape and has a locking hole 151123 (see [link to original text]) at the middle position. Figure 7The keyhole 151123 matches the shape of the hook 21238. Alternatively, the keyhole 151123 can also be located in other suitable positions, such as on the bottom side of the first arm 151121 near the frame base 13. Alternatively, the first arm 151121 can also be configured in other suitable shapes. In one or more embodiments, the second arm 151122 is perpendicular to the first arm 151121 and is generally triangular in shape. Alternatively, the second arm 151122 can also be configured in other suitable shapes, such as rectangular in shape. The abutment plates on the left and right sides of the first insertion plate 21236 abut against the first half 1511 of the first end plate and the second arm 151122, respectively, to prevent the body 2121 from swaying along the length of the frame base 13.

[0066] See Figure 2 and Figure 6 In one or more embodiments, the duct frame 14 is bolted to the frame base 13. Alternatively, the duct frame 14 can be fixed to the frame base 13 by snap-fit ​​or other suitable means. In one or more embodiments, a second half 141 of a third end plate is provided on the second end 12 of the duct frame 14. The second half 141 of the third end plate and the first half 132 of the third end plate cooperate to form the third end plate. In one or more embodiments, a support plate 1411 is provided on the second half 141 of the third end plate. The support plate 1411 is provided on the side of the second half 141 of the third end plate facing the duct 15 and matches the shape of the outer peripheral wall of the body 2121. The body 2121 abuts against the upper part of the support plate 1411. Alternatively, the support plate 1411 can also be provided in other suitable shapes.

[0067] See Figure 5 and Figure 6 In one or more embodiments, a second half 1512 of a first end plate is further provided on the second end 12 of the duct frame 14. A second positioning groove 15121 is provided on the second half 1512 of the first end plate. The second positioning groove 15121 matches the shape of the second positioning plate 21234, and the second positioning plate 21234 abuts against the upper part of the second half 1512 of the first end plate. In one or more embodiments, a second insertion frame 15122 is provided on the second half 1512 of the first end plate. The second insertion frame 15122 is provided on the side of the second half 1512 of the first end plate facing the third end plate, and matches the shape of the second insertion plate 21237. The second insertion plate 21237 is inserted into the second insertion frame 15122. The second insertion frame 15122 has a structure that is substantially the same as that of the first insertion frame 15112, and the two are substantially mirror-symmetrical. The difference between the first plug frame 15112 and the second plug frame 15122 is that the second plug frame 15122 does not have a lock hole.

[0068] See Figure 2 and Figure 6 In one or more embodiments, a first half 1511 and a second half 1512 of a first end plate cooperate to form a first end plate 151. The first end plate 151 and a third end plate are spaced apart along the length of the frame 1 to define the bearing assembly 21 between the first end plate 151 and the third end plate. In one or more embodiments, a limiting groove is provided on the first end plate 151. The limiting groove matches the shape of the outer peripheral wall of the body 2121 to place the body 2121 and prevent it from shaking. The side of the first end plate 151 facing the air duct 15 is on the same plane as the side of the body 2121 facing the air duct 15. In one or more embodiments, the air duct 15 is formed in the air duct frame 14, and the first end plate 151 and the second end plate 152 are disposed opposite each other at both ends of the air duct 15 to define the length of the air duct 15.

[0069] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A cross-flow fan characterized by, The cross-flow fan comprises: a bearing assembly; and a impeller having a first end cover close to the bearing assembly, a detachable rotating shaft is arranged on the first end cover, the rotating shaft is matched with the bearing assembly and is configured to be movable along a longitudinal center line of the impeller to be detached from the bearing assembly or the first end cover; a motor; the impeller further comprises a second end cover opposite to the first end cover, a shaft sleeve is arranged on the second end cover to form a detachable connection with a motor shaft of the motor, a avoiding slot is arranged on the shaft sleeve, and the avoiding slot is configured to allow the motor shaft to be inclined relative to the shaft sleeve when the motor shaft is partially extracted out of the shaft sleeve.

2. The cross-flow fan according to claim 1, characterized by a rotating shaft seat and a first through hole are formed on the first end cover, the rotating shaft seat forms a detachable connection with the rotating shaft and has a containing slot containing the rotating shaft, and the rotating shaft extends into the first through hole.

3. The cross-flow fan according to claim 2, characterized in that, the rotating shaft seat is configured to extend into the impeller from the first end cover along the longitudinal center line of the impeller.

4. The cross-flow fan of claim 2, wherein, the rotating shaft has a connecting end facing the impeller, and a first positioning plane is arranged on the connecting end; a first threaded hole is formed on a circumferential wall of the rotating shaft seat, and a first stop screw matched with the first threaded hole and abutting against the first positioning plane at one end is arranged in the first threaded hole.

5. The cross-flow fan of claim 1, wherein a disassembly gap is reserved between the first end cover and the bearing assembly.

6. The cross-flow fan of claim 1, wherein the shaft sleeve is configured to extend into the impeller from the second end cover along the longitudinal center line of the impeller, the avoiding slot is formed on an end of the shaft sleeve close to the second end cover, and an auxiliary avoiding slot is arranged on the second end cover and communicates with the avoiding slot.

7. The cross-flow fan of claim 1, wherein a second positioning plane is arranged on a shaft extension end of the motor shaft; a second threaded hole is formed on a circumferential wall of the shaft sleeve, and a second stop screw matched with the second threaded hole and abutting against the second positioning plane at one end is arranged in the second threaded hole.

8. The cross-flow fan of claim 7, wherein, the second threaded hole is arranged on an end of the shaft sleeve away from the second end cover, and the second threaded hole is connected with the avoiding slot.

9. An air conditioner indoor unit characterized by comprising: The air conditioner indoor unit comprises: a framework, a air duct extending along a longitudinal direction of the framework is formed in the framework; and the cross-flow fan according to any one of claims 1-8 is mounted on the framework, and the impeller of the cross-flow fan is located in the air duct.

10. The air conditioner indoor unit according to claim 9, wherein the air duct has opposite first and second end plates, and the impeller is arranged between the first and second end plates.

11. The air conditioner indoor unit according to claim 9, wherein the framework has a framework base extending between opposite first and second ends of the framework, and an air duct framework detachably connected with the framework base, the air duct is formed in the air duct framework; the motor of the cross-flow fan is mounted on the framework base at the first end, and the bearing assembly of the cross-flow fan forms a clamping fit with the framework base at the second end and forms a plug-in fit with the air duct framework.

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