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

Abstract

This invention relates to a cross-flow fan and an indoor air conditioning unit including the cross-flow fan. The cross-flow fan includes: a motor; and an impeller, the impeller having a first end cover near the motor, on which a bushing is provided for a detachably connected connection with the motor shaft. The bushing has a clearance groove configured to allow the motor shaft to tilt relative to the bushing after it has been partially withdrawn from the bushing. By transforming the rigid connection between the motor shaft and the bushing into a flexible connection that allows the motor shaft to tilt relative to the bushing after it has been partially withdrawn from the bushing, this cross-flow fan allows the motor shaft to be withdrawn from the bushing at an angle, thereby preserving as much of the impeller's working area and airflow as possible.

Description

Technical Field

[0001] This invention relates to the field of air conditioning indoor units, and more specifically to a cross-flow fan and an air conditioning indoor 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 motor to drive the impeller. The motor is fixed to the air conditioner frame and connected to the impeller via a shaft-sleeve connection. For example, Chinese invention patent CN111780251B discloses an indoor air conditioner unit where the impeller is arranged in the air duct between the left and right ends of the lower frame. The motor is mounted on one end of the lower frame, and the motor's output shaft passes through the end plate of the lower frame and extends into the impeller's sleeve, forming a fixed connection with the sleeve via bolts. When disassembling the impeller in this type of indoor air conditioner unit, the impeller needs to be moved along its length within the air duct to completely disengage the sleeve from the motor shaft. Therefore, a large impeller movement clearance needs to be reserved within the air duct. When the overall size of the indoor air conditioner unit remains unchanged, a large impeller movement clearance requires shortening the original length of the impeller, which reduces the impeller's working area and airflow.

[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 existing air conditioning indoor units that require a large impeller movement clearance, reducing the impeller's working area and airflow, this invention provides a cross-flow fan. The cross-flow fan includes: a motor; and an impeller, the impeller having a first end cover near the motor, a bushing on the first end cover forming a detachable connection with the motor shaft, a clearance groove on the bushing, and the clearance groove being configured to allow the motor shaft to tilt relative to the bushing when it is partially pulled out of the bushing.

[0006] The cross-flow fan of this invention includes a motor and an impeller. The impeller is adapted to be installed within the air duct of an indoor air conditioning unit, and the motor is adapted to be fixed to one end of the indoor air conditioning unit. A bushing forms a detachable connection with the motor shaft, allowing the impeller to be removed from the indoor air conditioning unit without disassembling the motor. After the motor shaft is partially pulled out of the bushing, a clearance groove allows the motor shaft to tilt relative to the bushing, enabling the impeller to be removed from the air duct at an angle, thereby reducing the clearance required for impeller movement within the air duct. During normal operation of the cross-flow fan, the bushing and motor shaft form a rigid connection, and the motor drives the motor shaft to rotate, which in turn drives the bushing and impeller to rotate. When the impeller needs to be removed from the indoor air conditioning unit, simply move the impeller along its length to partially pull the motor shaft out of the bushing, then pull the end of the impeller away from the motor and pull that end out of the air duct, and finally pull the impeller away from the motor to completely detach the motor shaft from the bushing. With the above-described configuration, the rigid connection between the motor shaft and the bushing of the present invention is configured into a flexible connection that allows the motor shaft to be pulled out of the bushing in a relatively tilted manner after a portion of it is pulled out. This allows the motor shaft to be pulled out of the bushing at an angle, thereby preserving the working area and airflow of the impeller as much as possible.

[0007] In a preferred embodiment of the cross-flow fan of the present invention, the bushing is configured to extend from the first 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 first end cover, and an auxiliary clearance groove communicating with the clearance groove is provided on the first end cover. Through this arrangement, the bushing extends from the first end cover into the impeller, allowing the first 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 first 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.

[0008] In a preferred embodiment of the cross-flow fan of the present invention, the bushing is configured to extend from the first end cover outwards along the longitudinal centerline of the impeller, and a clearance groove is provided on the end of the bushing away from the first end cover. Through this configuration, the bushing extending from the first end cover outwards from the impeller can pass through the air duct and connect to the motor shaft, making the first end cover fit more tightly against the end of the air duct, thereby increasing the working area and airflow of the impeller.

[0009] In a preferred embodiment of the cross-flow fan of the present invention, a positioning plane is provided on the extended end of the motor shaft; a threaded hole is formed on the circumferential wall of the bushing, and a set screw that mates with the threaded hole and abuts against the positioning plane is provided in the threaded hole. Through the above arrangement, the positioning plane is located at the end of the motor shaft and abuts against the set screw, preventing relative rotation between the motor shaft and the bushing. Simultaneously, the connection between the motor shaft and the bushing via the set screw facilitates the connection and disassembly of the motor shaft and the bushing, and facilitates the installation and disassembly of the impeller.

[0010] In a preferred embodiment of the cross-flow fan of the present invention, the threaded hole is arranged at the end of the bushing away from the first end cover, and the threaded hole is connected to the clearance groove. With the above arrangement, the clearance groove is connected to the threaded hole, making it easier to observe the position of the positioning plane after the motor shaft extends into the bushing, so that the positioning plane can be positioned to the position of the threaded hole, thereby facilitating the connection between the motor shaft and the bushing.

[0011] In a preferred embodiment of the cross-flow fan of the present invention, the impeller further includes a second end cover opposite to the first end cover, on which a rotating shaft is disposed; the cross-flow fan further includes a bearing assembly, the bearing assembly being configured to allow the rotating shaft to rotate and tilt, so that the bearing assembly can disengage from the rotating shaft in a first direction perpendicular to the longitudinal centerline of the impeller; a floating gap is provided between the second end cover and the bearing assembly to facilitate the movement of the impeller. A limiting structure is often provided at the end of the indoor unit of an air conditioner used to install the bearing assembly, making it difficult for the bearing assembly to move longitudinally within the indoor unit and thus disengage from it. With the above-described configuration, the bearing assembly is suitable for installation at the end of the indoor unit away from the motor, supporting the rotating shaft and allowing it to rotate, so that the impeller can rotate suspended within the duct. The rotating shaft can tilt within the bearing assembly, allowing the bearing assembly to disengage from the indoor unit in a first direction perpendicular to the longitudinal centerline of the impeller, thereby facilitating impeller disassembly.

[0012] In a preferred embodiment of the cross-flow fan of the present invention, the bearing assembly includes a rubber bearing for accommodating the rotating shaft and a bearing housing for mounting the rubber bearing. With the above arrangement, the rubber bearing is an elastic element, allowing the rotating shaft to tilt through its elastic deformation.

[0013] To improve or solve the technical problem in existing air conditioning indoor units that require a large impeller movement clearance, affecting the impeller's working area and airflow, this invention also provides an air conditioning indoor unit. The indoor unit includes: a frame with a longitudinally extending air duct formed within the frame; and a cross-flow fan according to any one of the preceding claims, wherein the cross-flow fan is mounted on the frame and its impeller is located in the air duct. By employing the cross-flow fan according to any one of the preceding claims, this invention allows the impeller to be removed from the frame with only a slight increase in the air duct length, thus preserving the impeller's working area and airflow as much as possible.

[0014] 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.

[0015] 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 housing 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 housing engages with the frame base and inserts into the duct frame, which not only improves the installation stability of the bearing housing and the frame, but also enhances the connection stability of 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. Simultaneously, after the duct frame is removed, the bearing assembly and impeller can also be more easily removed from the frame base. Attached Figure Description

[0016] The preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

[0017] 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;

[0018] Figure 2 This is an exploded structural diagram of an embodiment of the indoor unit of the air conditioner of the present invention;

[0019] Figure 3 This is an exploded structural diagram of the motor and the first end cover in the first embodiment of the cross-flow fan of the present invention.

[0020] Figure 4This is an exploded structural diagram of an embodiment of the second end of the frame in the indoor unit of the air conditioner of the present invention;

[0021] Figure 5 This is another exploded structural diagram of an embodiment of the second end of the frame in the indoor unit of the air conditioner of the present invention;

[0022] Figure 6 This is a third exploded structural diagram of an embodiment of the second end of the frame in the indoor unit of the air conditioner of the present invention;

[0023] Figure 7 This is a schematic diagram of another embodiment of the first end cover in the cross-flow fan of the present invention.

[0024] List of reference numerals in the attached diagram:

[0025] 100. Indoor unit of air conditioner.

[0026] 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; 152. Second end plate; 1521. First half of the second end plate; 15211. First positioning groove; 15 212, First plug-in frame; 152121, First support arm; 152122, Second support arm; 152123, Lock hole; 1522, Second half of the second end plate; 15221, Second positioning groove; 15222, Second plug-in frame; 2, Cross-flow fan; 21, Bearing assembly; 211, Rubber bearing; 2111, Snap ring; 212, Bearing seat; 2121, Body; 21211, First side; 21212, Second side; 2122, Limiting plate; 21221, First ring limiting plate; 21222, 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. Claw; 221. Motor shaft; 222. Shaft extension end; 223. Positioning plane; 23. Impeller; 231. First end cover; 2311. Shaft sleeve; 23111. Threaded hole; 23112. Set screw; 23113. Clearance groove; 2312. Auxiliary clearance groove; 2313. Through hole; 232. Second end cover; 2321. Rotating shaft; 233. Fan blade; 234. Floating clearance. Detailed Implementation

[0027] 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.

[0028] 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.

[0029] 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.

[0030] To improve or solve the technical problem in existing air conditioning indoor units that require a large impeller movement clearance, thus reducing the impeller's working area and airflow, this invention provides a cross-flow fan. The cross-flow fan 2 includes: a motor 22; and an impeller 23. The impeller 23 has a first end cover 231 near the motor 22. A bushing 2311 is provided on the first end cover 231, forming a detachable connection with the motor shaft 221 of the motor 22. A clearance groove 23113 is provided on the bushing 2311, and the clearance groove 23113 is configured to allow the motor shaft 221 to tilt relative to the bushing 2311 after the motor shaft 221 is partially pulled out of the bushing 2311.

[0031] 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. Figure 3 This is an exploded structural diagram of the motor and the first end cover in the first embodiment of the cross-flow fan of the present invention. 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.

[0032] See Figure 2 and Figure 3In one or more embodiments, the impeller 23 includes a blade 233, a first end cap 231, and a second end cap 232, wherein the blade 233 extends 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 right end cap, located at the first end of the impeller 23; the second end cap 232 is the left 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.

[0033] See Figure 3 A bushing 2311 and a through hole 2313 are provided on the first end cover 231. In one or more embodiments, the bushing 2311 extends from the through hole 2313 of the first end cover 231 into the impeller 23 along the longitudinal centerline of the impeller 23. In one or more embodiments, a threaded hole 23111 is provided on the circumferential wall of the bushing 2311, the threaded hole 23111 extending radially along the bushing 2311 and positioned near the middle of the bushing 2311. The threaded hole 23111 is used to mate with a set screw 23112. Alternatively, the threaded hole 23111 may also be provided in other suitable locations.

[0034] See also Figure 3 In one or more embodiments, a clearance groove 23113 is provided on the end of the bushing 2311 that connects with the first end cap 231. Based on Figure 3 As shown in the diagram, the right end of the bushing 2311 is connected to the first end cap 231. An auxiliary clearance groove 23113 is also provided on the first end cap 231, extending radially outward from the through hole 2313 of the first end cap 231. The clearance groove 23113 extends along the length of the bushing 2311 to the first end cap 231 and is connected to the auxiliary clearance groove 23113. In one or more embodiments, the clearance groove 23113 extends from the threaded hole 23111 to the first end cap 231.

[0035] See Figure 2 In one or more embodiments, a rotating shaft 2321 is provided on the second end cover 232. The rotating shaft 2321 extends from the second end cover 232 toward the bearing assembly 21 and can be inserted into the bearing assembly 21. The rotating shaft 2321, the second end cover 232, and the bearing assembly 21 share a common centerline. Figure 2 As shown in the diagram, the pivot 2321 extends to the left.

[0036] See Figure 2 and Figure 3In the assembled state, the motor 22 is located at the first end of the impeller 23, near the first end cover 231. For example... Figure 3 As shown, the motor 22 has a motor shaft 221 that extends toward the impeller 23 through a through hole 2313 on the first end cover 231. In one or more embodiments, the motor shaft 221 is generally cylindrical, and a 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 shape. When the motor shaft 221 extends into the bushing 2311, one end of the set screw 23112 passes through the threaded hole 23111 and abuts against the positioning plane 223 of the motor shaft 221.

[0037] Figure 4 This is an exploded structural diagram of an embodiment of the frame at the second end of the indoor unit of the air conditioner according to the present invention. Figure 4 As shown, in the assembled state, the bearing assembly 21 is located at the second end of the impeller 23, near the second end cover 232. The bearing assembly 21 shares a centerline with the motor shaft 221, the first end cover 231, the bushing 2311, the second end cover 232, and the rotating shaft 2321. In one or more embodiments, a floating gap 234 is provided between the second end cover 232 and the bearing assembly 21. Due to the presence of the floating gap 234, the impeller 23 can move towards the bearing assembly 21, and the clearance groove 23113 can move with the bushing 2311, thereby allowing a portion of the motor shaft 221 to be pulled out of the bushing 2311. When the bushing 2311 moves until the shaft extension end 222 of the motor shaft 221 is located within the clearance groove 23113, the bushing 2311 allows the motor shaft 221 to tilt relative to the bushing 2311. At this point, pull the bearing assembly 21 and the second end cover 232 outwards to remove them from the indoor unit of the air conditioner. Finally, pull the impeller 23 to the left to disengage the bushing 2311 from the motor shaft 221 and remove the impeller 23 from the indoor unit of the air conditioner.

[0038] like Figure 4 As shown, the bearing assembly 21 includes a bearing housing 212 and a rubber bearing 211, with the rubber bearing 211 disposed within the bearing housing 212. In one or more embodiments, the rubber bearing 211 is an elastic element made of rubber. In one or more embodiments, a retaining ring 2111 is provided on the outer circumferential surface of the rubber bearing 211 so that the rubber bearing 211 can be engaged within the bearing housing 212.

[0039] Figure 5 This is another exploded structural diagram of an embodiment of the frame at the second end of the indoor unit of the air conditioner according to the present invention. See also Figure 4 and Figure 5The 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 rubber 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 two 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.

[0040] Figure 6 This is a third exploded structural diagram of an embodiment of the second end of the indoor unit of the air conditioner of the present invention. (See diagram below.) Figure 5 and Figure 6 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.

[0041] See also Figure 5 and Figure 6 In 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 5As shown, the first positioning plate 21233 extends inward and tilts upward; the second positioning plate 21234 extends outward and tilts downward. 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 between the first positioning plate 21233, the second positioning plate 21234 and the body 2121.

[0042] See also Figure 5 and Figure 6 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 5 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.

[0043] Figure 7 This is a schematic diagram of another embodiment of the first end cover in the cross-flow fan of the present invention. In this embodiment, the bushing 2311 extends from the through hole 2313 of the first end cover 231 towards the motor 22, and the clearance groove 23113 is provided on the end of the bushing 2311 away from the first end cover 231. Therefore, the auxiliary clearance groove 23113 is eliminated. The bushing 2311 extends towards 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 first end cover 231 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.

[0044] To improve or solve the technical problem in the prior art where air conditioner indoor units require a large impeller movement clearance, thus reducing the impeller's working area and air volume, the present invention also provides an air conditioner indoor unit 100, which includes a frame 1, within which an air duct 15 is formed; and a cross-flow fan 2 according to any one of the above, wherein 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.

[0045] 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 motor 22 is mounted on the first end 11, the bearing assembly 21 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 right end of the skeleton 1, and the second end 12 is the left end of the skeleton 1.

[0046] 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, respectively.

[0047] See also Figure 2 In one or more embodiments, a motor mounting base 131 is provided on the frame base 13 at the first end 11 for mounting the motor 22. Alternatively, the motor mounting base 131 may also be provided on the second end 12 of the frame base 13 or other suitable locations. In one or more embodiments, the motor shaft 221 passes through the first end plate 15 and is connected to the bushing 2311 of the impeller 23.

[0048] See Figure 4 and Figure 5In one or more embodiments, at the second end 12, a third end plate first half 132 and a second end plate first half 1521, which are relatively parallel, are provided on the frame base 13. Based on Figure 3 As shown in the diagram, the first half 1521 of the second end plate is positioned 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 1521 of the second end plate, such that the bearing assembly 21 can only disengage from the frame base 13 and the shaft 2321 in a first direction perpendicular to the length direction of the frame base 13 (i.e., the longitudinal centerline direction of the air duct), that is, the bearing assembly 21 can only disengage from the frame base 13 and the shaft 2321 in a direction facing outwards from the paper. 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.

[0049] See also Figure 4 and Figure 5 In one or more embodiments, a first positioning groove 15211 is formed on the first half 1521 of the second end plate. The first positioning groove 15211 matches the shape of the first positioning plate 21233, and the first positioning plate 21233 abuts against the first half 1521 of the second end plate. In one or more embodiments, a first insertion frame 15212 is provided on the first half 1521 of the second end plate. The first insertion frame 15212 is provided on the side of the first half 1521 of the second 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 15212. Based on Figure 4As shown, the first insertion frame 15212 extends outward from the paper and is slightly inclined upward. Alternatively, the first insertion frame 15212 may extend in other suitable directions, such as horizontally outward from the paper. In one or more embodiments, the first insertion frame 15212 includes a first arm 152121 and a second arm 152122 connected to the first arm 152121. The first arm 152121 is perpendicular to the body of the first half 1521 of the second end plate. The first arm 152121 is generally rectangular in shape, and a locking hole 152123 is provided in the middle of the first arm 152121, the locking hole 152123 matching the shape of the hook 21238. Alternatively, the locking hole 152123 may be provided in other suitable locations, such as on the bottom side of the first arm 152121 near the frame base 13. Alternatively, the first arm 152121 may be configured in other suitable shapes. In one or more embodiments, the second arm 152122 is perpendicular to the first arm 152121, and the second arm 152122 is generally triangular in shape. Alternatively, the second arm 152122 can also be configured in other suitable shapes, such as rectangular plates. The abutment plates on the left and right sides of the first insertion plate 21236 abut against the first half 1521 of the second end plate and the second arm 152122, respectively, to prevent the body 2121 from swaying along the length of the frame base 13.

[0050] See Figure 2 and Figure 4 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.

[0051] See Figure 4 and Figure 5In one or more embodiments, a second end plate second half 1522 is further provided on the second end 12 of the air duct frame 14. A second positioning groove 15221 is provided on the second end plate second half 1522. The second positioning groove 15221 matches the shape of the second positioning plate 21234, and the second positioning plate 21234 abuts against the upper part of the second end plate second half 1522. In one or more embodiments, a second insertion frame 15222 is provided on the second end plate second half 1522. The second insertion frame 15222 is provided on the side of the second end plate second half 1522 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 15222. The second insertion frame 15222 has a structure that is substantially the same as the first insertion frame 15212, and the two are substantially mirror-symmetrical. The difference between the first plug frame 15212 and the second plug frame 15222 is that the second plug frame 15222 does not have a lock hole.

[0052] See Figure 2 and Figure 4 In one or more embodiments, the first half 1521 and the second half 1522 of the second end plate cooperate to form the second end plate 152. The second end plate 152 and the third end plate are arranged at intervals along the length direction of the frame 1 to define the bearing assembly 21 between the second end plate 152 and the third end plate. In one or more embodiments, a limiting groove is provided on the second end plate 152. The limiting groove matches the shape of the outer peripheral wall of the body 2121 to place the body 2121 and prevent the body 2121 from shaking. The side of the second end plate 152 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.

[0053] 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 motor; and a rotor having a first end cover close to the motor, the first end cover being provided with a shaft sleeve forming a detachable connection with a motor shaft of the motor, the shaft sleeve being provided with a relief groove configured to allow the motor shaft to tilt relative to the shaft sleeve when the motor shaft is partially extracted out of the shaft sleeve, the shaft sleeve being configured to extend along a longitudinal center line of the rotor from the first end cover to inside the rotor, the relief groove being formed on an end of the shaft sleeve close to the first end cover, and the first end cover being provided with a secondary relief groove in communication with the relief groove, or the shaft sleeve being configured to extend along the longitudinal center line of the rotor from the first end cover to outside the rotor, and the relief groove being formed on an end of the shaft sleeve away from the first end cover.

2. The cross-flow fan according to claim 1, wherein a positioning plane is formed on an axial end of the motor shaft; a threaded hole is formed on a circumferential wall of the shaft sleeve, and a set screw is arranged in the threaded hole and abuts against the positioning plane at one end.

3. The cross-flow fan according to claim 2, characterized in that, The threaded hole is arranged on an end of the shaft sleeve away from the first end cover, and the threaded hole is in communication with the relief groove.

4. The cross-flow fan of claim 1, wherein The rotor further comprises a second end cover opposite to the first end cover, and a rotating shaft is arranged on the second end cover; The cross-flow fan further comprises a bearing assembly configured to allow the rotating shaft to rotate and tilt, so that the bearing assembly is separated from the rotating shaft along a first direction perpendicular to the longitudinal center line of the rotor; A floating gap is arranged between the second end cover and the bearing assembly to facilitate movement of the rotor.

5. The cross-flow fan according to claim 4, characterized in that, The bearing assembly comprises a rubber bearing for accommodating the rotating shaft and a bearing seat for mounting the rubber bearing.

6. An air conditioner indoor unit characterized by comprising: The air conditioner indoor unit comprises: a framework in which an air duct extending along a longitudinal direction of the framework is formed; and The cross-flow fan according to any one of claims 1-5 is mounted on the framework, and the rotor of the cross-flow fan is located in the air duct.

7. The air conditioner indoor unit according to claim 6, wherein The air duct has opposite first and second end plates, and the rotor is arranged between the first and second end plates.

8. The air conditioner indoor unit according to claim 6, 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 being 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 seat of the cross-flow fan is in a clamping fit with the framework base at the second end and in a plug-in fit with the air duct framework.

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