Washing machine and control method thereof

Abstract

The present invention provides a washing machine and a control method thereof, belonging to the technical field of household appliances. The washing machine includes a drum, a pulsator, a magnetic gear compound motor, and a clutch device. The magnetic gear compound motor includes a rotor assembly, a magnetic adjustment ring assembly, and a stator assembly. The rotor shaft is connected to the pulsator via the pulsator shaft. The drum shaft is mounted in a gap outside the pulsator shaft. The drum shaft is connected to the drum. The drum shaft has a high speed state driven by the rotor shaft and a low speed state driven by the magnetic adjustment ring assembly. The clutch device is used to switch the drum shaft between the high speed state and the low speed state. The drum shaft of the present invention is directly and switchably connected to the rotor shaft or the magnetic adjustment ring assembly, achieving differential rotation or synchronous high-speed rotation of the drum and the pulsator. The structure is simple and easy to assemble, effectively reducing mechanical loss during power transmission, improving the energy efficiency of the washing machine, and eliminating the unstable operation caused by the use of belt drive.

Description

Technical Field

[0001] The present invention belongs to the technical field of household appliances, and in particular relates to a washing machine and a control method thereof. Background Art

[0002] In order to improve the cleaning ability of a washing machine, a pulsator is generally installed at the bottom of the drum of the washing machine. During washing, the drum and the pulsator rotate relative to each other at different speeds, increasing the friction between the clothes and thus improving the cleaning ratio. Currently, common dual-power washing machines (such as the patent document with patent application number CN201821254938.6) use a permanent magnet synchronous motor plus a pulley drive or an external rotor motor direct drive as a power source. In order to achieve differential relative operation of the drum and the pulsator, a planetary gear set and a clutch device are required. However, the planetary gear set is a relatively complex mechanical transmission with many parts, the assembly process is relatively difficult, and the mechanical loss during the transmission process is relatively large. Generally, in order to reduce weight, the planetary gear set is made of plastic material with poor rigidity. When the washing machine is heavily loaded, the planetary gear set part is more prone to failure. In addition, the belt drive is less efficient and is prone to slipping when washing with a large load, affecting the washing effect. Summary of the Invention

[0003] Therefore, the present invention provides a washing machine and a control method thereof, which can solve the technical problems in the prior art that the differential speed adjustment between the drum and the impeller in the washing machine is achieved by a pulley or a planetary gear set and a clutch device, which involves a large number of components and is difficult to assemble, and has large mechanical transmission losses and low transmission efficiency.

[0004] In order to solve the above problems, the present invention provides a washing machine, comprising a drum and a pulsator, and also comprising a magnetic gear compound motor and a clutch device. The magnetic gear compound motor comprises a rotor assembly, a magnetic adjustment ring assembly coaxially sleeved outside the rotor assembly, and a stator assembly coaxially sleeved outside the magnetic adjustment ring assembly. The first end of the rotor shaft of the rotor assembly is coaxially connected to the pulsator shaft, the pulsator shaft is connected to the pulsator, and a drum shaft is sleeved in the outer gap of the pulsator shaft. The first end of the drum shaft is connected to the drum, and the drum shaft has a high-speed state driven by the rotor shaft and a low-speed state driven by the magnetic adjustment ring assembly. The clutch device is used to realize the switching of the drum shaft between the high-speed state and the low-speed state.

[0005] In some embodiments, the clutch device includes a clutch sleeve, which is coaxially spaced on the outside of the drum shaft. The clutch sleeve has a first position away from the magnetic gear compound motor and corresponding to the high speed state, and a second position close to the magnetic gear compound motor and corresponding to the low speed state. The clutch sleeve can be driven to move axially along the drum shaft to achieve switching of the clutch sleeve between the first position and the second position.

[0006] In some embodiments, the clutch sleeve has a first connection portion, a second connection portion, and a third connection portion on the wall of the central through hole along its axial direction. The first connection portion, the second connection portion, and the third connection portion are arranged in sequence and spaced apart in a direction away from the magnetic gear compound motor. When the clutch sleeve is in the first position, the second connection portion is drive-connected to the rotor shaft, the third connection portion is drive-connected to the roller shaft, and the first connection portion is disconnected from the magnetic adjustment ring assembly. When the clutch sleeve is in the second position, the first connection portion is drive-connected to the magnetic adjustment ring assembly, the third connection portion is drive-connected to the roller shaft, and the second connection portion is disconnected from the rotor shaft.

[0007] In some embodiments, the magnetic gear compound motor further includes a motor housing, the rotor assembly, the magnetic adjustment ring assembly, and the stator assembly are all assembled in the accommodating space of the motor housing, and the second end of the rotor shaft is pivotally supported on the wall of the motor housing.

[0008] In some embodiments, the magnetic modulation ring assembly includes a modulation core arranged in an annular manner and a first support end cover connected to the first end of the modulation core, the first support end cover can be rotatably mounted on the rotor shaft, and the first support end cover is located on the side of the rotor assembly close to the impeller shaft; and / or, a plurality of weight-reducing through holes are constructed on the motor housing.

[0009] In some embodiments, the magnetic modulation ring assembly further includes a second support end cover connected to the second end of the modulation core. The second support end cover is rotatably mounted on the rotor shaft and together with the first support end cover forms a clamp for the modulation core.

[0010] In some embodiments, the first support end cover is rotatably mounted on the rotor shaft through a first through hole, and a magnetic adjustment connection portion is provided around the outer edge of the opening of the first through hole. When the clutch sleeve is in the second position, the first connection portion is engaged with the magnetic adjustment connection portion.

[0011] In some embodiments, a first shaft connection portion is provided on the outer peripheral wall of the first end of the rotor shaft, and when the clutch sleeve is in the first position, the second connection portion engages with the first shaft connection portion; and / or, a second shaft connection portion is provided on the outer peripheral wall of one end of the drum shaft close to the magnetic gear compound motor, and when the clutch sleeve is in the first position or the second position, the second shaft connection portion engages with the third connection portion.

[0012] In some embodiments, an annular groove extending along the circumference of the clutch sleeve is constructed on the outer cylindrical wall of the clutch sleeve, and the clutch device also includes a drive ring and a clutch drive member. The drive ring gap is installed in the annular groove, and the clutch drive member can drive the drive ring to move back and forth linearly along the axial direction of the clutch sleeve.

[0013] In some embodiments, the clutch drive member is a rotary motor, and a free end of a rotating shaft of the rotary motor is threadedly connected to the drive ring.

[0014] The present invention also provides a method for controlling a washing machine, which is used to control the operation of the washing machine, comprising the following steps:

[0015] Get the operating mode of the washing machine;

[0016] The clutch device is controlled to operate according to the acquired operating mode to realize the switching of the drum shaft between the high speed state and the low speed state.

[0017] In some embodiments, when the operation mode is a washing mode and the clutch device includes a clutch sleeve and a rotary motor, the rotary motor is controlled to rotate along a first rotation direction so that the clutch sleeve is in a second position; or

[0018] When the operation mode is the dehydration mode and the clutch device includes a clutch sleeve and a rotary motor, the rotary motor is controlled to rotate along a second rotation direction to place the clutch sleeve in a first position, and the first rotation direction is opposite to the second rotation direction.

[0019] The present invention provides a washing machine and a control method thereof. Compared with the dual-drive washing machines in the prior art that use a pulley or a planetary gear set in conjunction with a clutch device, the present invention uses a magnetic gear compound motor and utilizes the differential speed characteristic of the rotor assembly and the magnetic adjustment ring assembly of the magnetic gear compound motor during operation. The drum shaft and the rotor shaft or the magnetic adjustment ring assembly are switchably directly driven and connected, achieving the design purpose of differential rotation or synchronous high-speed rotation of the drum and the impeller. The structure is simple and easy to assemble, effectively reducing mechanical losses during power transmission, improving the energy efficiency of the washing machine, and eliminating the occurrence of unstable operation caused by the use of belt drive. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the structure of some components of a washing machine according to an embodiment of the present invention (axial cross section);

[0021] Figure 2 for Figure 1 Schematic diagram of the exploded structure of the magnetic gear compound motor;

[0022] Figure 3 for Figure 1 Schematic diagram of the exploded structure of the clutch device (including the drum shaft);

[0023] Figure 4 for Figure 3 Schematic diagram of the structure of the clutch sleeve.

[0024] The reference numerals indicate:

[0025] 111. Rotor shaft; 1111. First shaft connection; 112. Rotor core; 113. Rotor magnet; 121. Modulation core; 122. First support end cover; 1221. Magnetization connection; 123. Second support end cover; 131. Stator core; 132. Stator magnet; 14. Motor housing; 141. Weight-reducing through hole; 15. Limiting spring; 161. First bearing; 162. Second bearing; 21. Clutch sleeve; 211. First connection; 212. Second connection; 213. Third connection; 214. Ring groove; 22. Drive ring; 23. Clutch drive; 31. Impeller shaft; 32. Drum shaft; 321. Second shaft connection. DETAILED DESCRIPTION

[0026] See also Figures 1 to 4As shown, according to an embodiment of the present invention, a washing machine is provided, comprising a housing and a drum and a pulsator therein (not shown in the figure), a magnetic gear compound motor (not labeled in the figure), and a clutch device (not labeled in the figure). The magnetic gear compound motor comprises a motor housing 14 and a rotor assembly (not labeled in the figure) therein, a magnetic adjustment ring assembly (not labeled in the figure) coaxially mounted on the outside of the rotor assembly, and a stator assembly (not labeled in the figure) coaxially mounted on the outside of the magnetic adjustment ring assembly, wherein the stator assembly comprises an inner portion fixedly connected to the motor housing 14 by interference fit. The stator core 131 on the wall, the stator core 131 is provided with a plurality of stator magnets 132 on the side facing the magnetic tuning ring assembly, the yoke of the stator core 131 is wound with a stator winding (not shown in the figure), the rotor assembly includes a rotor shaft 111 and a rotor core 112 sleeved thereon, and a plurality of rotor magnets 113 are attached to the outer peripheral wall of the rotor core 112. The magnetic tuning ring assembly is located in the air gap between the stator and rotor, and does not contact the stator assembly and the rotor assembly (i.e., a gap is formed). The magnetic tuning ring assembly has a modulation core 121. In a specific embodiment , there are multiple modulation cores 121, and the multiple modulation cores 121 are evenly spaced along the circumference of the rotor shaft 111. When the stator winding is energized, under the combined action of the alternating magnetic field and the various iron cores and magnetic steels, the rotor assembly is driven to rotate at high speed along one rotation direction, while the magnetic ring assembly is driven to rotate at a low speed (lower than the rotation speed of the rotor assembly) in the same direction as the rotation direction of the rotor assembly. It can be understood that the motor housing 14 is fixedly connected to the fixed structure of the washing machine (such as the outer barrel wall of the washing machine). Therefore, in the aforementioned process, the stator assembly is fixed and the rotor is not fixed. The first end of the rotor shaft 111 of the subassembly is coaxially connected to the pulsator shaft 31, the pulsator shaft 31 is connected to the pulsator, and the outer gap of the pulsator shaft 31 is fitted with a drum shaft 32, the first end of the drum shaft 32 is connected to the drum, and the drum shaft 32 has a high-speed state for driving the rotor shaft 111 to rotate (specifically corresponding to the dehydration mode of the washing machine) and a low-speed state for driving the magnetic ring assembly to rotate (specifically corresponding to the washing mode of the washing machine), and the clutch device is used to realize the switching of the drum shaft 32 between the high-speed state and the low-speed state.

[0027] In this technical solution, compared to the prior art dual-drive washing machines that use pulleys or planetary gear sets in conjunction with clutch devices, the present invention uses a magnetic gear compound motor and takes advantage of the differential speed characteristics of the rotor assembly and magnetic adjustment ring assembly of the magnetic gear compound motor during operation. The drum shaft and the rotor shaft or magnetic adjustment ring assembly are directly and switchably connected to each other, achieving the design goal of differential rotation or synchronous high-speed rotation of the drum and impeller. The simple structure facilitates assembly, effectively reduces mechanical losses during power transmission, improves the energy efficiency of the washing machine, and eliminates the operational instability caused by the use of belt drive. It should also be noted that the magnetic gear compound motor has the characteristics of low speed and high torque, which can ensure that the drum and impeller have sufficient rotational power.

[0028] The first end of the aforementioned rotor shaft 111 and the impeller shaft 31 can be reliably connected to each other by, for example, a detachable manner such as mortise and tenon.

[0029] See also Figure 1 and Figure 3As shown, the clutch device includes a clutch sleeve 21, which is coaxially mounted on the outer side of the drum shaft 32 with a clearance. The clutch sleeve 21 has a first position, away from the magnetic gear compound motor and corresponding to a high speed state, and a second position, closer to the magnetic gear compound motor and corresponding to a low speed state. The clutch sleeve 21 can be driven to move axially along the drum shaft 32 to switch between the first and second positions. That is, when the clutch sleeve 21 is in the first position, the drum shaft 32 is in a high speed state, while when the clutch sleeve 21 is in the second position, the drum shaft 32 is in a low speed state. In this technical solution, the clutch sleeve 21 is mounted on the outer circumference of the drum shaft 32. By controlling its axial position, the drum shaft 32 can be adjusted to two different rotational speeds by adjusting its axial position, thereby achieving either synchronous or differential rotation of the drum and impeller. This effectively improves the axial utilization of the washing machine, and the structure is very compact, reducing the overall size of the washing machine. In a specific embodiment, the clutch sleeve 21 has a first connection portion 211, a second connection portion 212 and a third connection portion 213 along its axial direction on the wall of the central through hole. The first connection portion 211, the second connection portion 212 and the third connection portion 213 are arranged in sequence in a direction away from the magnetic gear compound motor. When the clutch sleeve 21 is in the first position, the second connection portion 212 is drive-connected to the rotor shaft 111, the third connection portion 213 is drive-connected to the drum shaft 32, and the first connection portion 211 is disconnected from the magnetic adjustment ring assembly. When the clutch sleeve 21 is in the second position, the first connection portion 211 is drive-connected to the magnetic adjustment ring assembly, the third connection portion 213 is drive-connected to the drum shaft 32, and the second connection portion 212 is disconnected from the rotor shaft 111. In this technical solution, the clutch sleeve 21 is driven and connected to the drum shaft 32 through the third connecting portion 213, and no matter whether the clutch sleeve 21 is in the first position or the second position, both are in a connected state, and the first connecting portion 211 and the second connecting portion 212 are respectively the parts that are driven and connected to the magnetic adjustment ring assembly or the rotor shaft 111. The different axial positions of the clutch sleeve 21 determine the connection relationship, that is, it is realized that the drum shaft 32 follows the rotation of the magnetic adjustment ring assembly and the rotor shaft 111. Specifically, the aforementioned first connecting portion 211, the second connecting portion 212 and the third connecting portion 213 can achieve the aforementioned connection or disconnection through corresponding quick-plug and quick-pull structures, with a simple structure and convenient control.

[0030] See also Figure 2As previously mentioned, the rotor assembly, magnetic tuning ring assembly, and stator assembly are all assembled within the housing of the motor housing 14. The second end of the rotor shaft 111 is pivotally supported on the wall of the motor housing 14. The second end of the rotor shaft 111 can be rotatably connected to the end plate of the motor housing 14 via a second bearing 162, which makes the position of the rotor assembly more secure and simplifies the structure of the motor. The motor housing 14 is specifically a cup-shaped structure. The bottom of the cup is also the aforementioned end plate, while the clutch device and components such as the drum and impeller are located on the cup mouth. The cup mouth of the cup is turned outward to form a mounting flange, which is used to connect to the fixed structure of the washing machine. In one specific embodiment, the motor housing 14 is constructed with multiple weight-reducing through-holes 141 to reduce the weight of the motor housing 14 and achieve a lightweight design of the motor. In addition, a limit spring 15 is provided at the second end of the rotor shaft 111 to reliably limit the axial position of the rotor shaft 111.

[0031] As mentioned above, the magnetic tuning ring assembly includes a modulation core 121 arranged in a ring. As a specific implementation method, the magnetic tuning ring assembly also includes a first support end cover 122 connected to the first end of the modulation core 121. The first support end cover 122 can be rotatably mounted on the rotor shaft 111 (for example, through a first bearing 161), and the first support end cover 122 is located on the side of the rotor assembly close to the impeller shaft 31. The positions of the multiple modulation cores 121 are fixed by the first support end cover 122 to ensure that their positions are reliable and stable during the rotation of the magnetic tuning ring assembly. Furthermore, the magnetic tuning ring assembly also includes a second support end cover 123 connected to the second end of the modulation core 121. The second support end cover 123 can be rotatably mounted on the rotor shaft 111 (for example, also through the second bearing 162), and together with the first support end cover 122, forms a clamp for the modulation core 121. The axial position of the modulation core 121 can be reliably limited by the first support end cover 122 and the second support end cover 123, and the structure of the magnetic tuning ring assembly is more stable and reliable.

[0032] See also Figure 2As shown, the first support end cap 122 is rotatably mounted on the rotor shaft 111 through a first through-hole (not labeled in the figure). A magnetic adjustment connection portion 1221 is provided around the outer edge of the opening of the first through-hole. When the clutch sleeve 21 is in the second position, the first connection portion 211 engages with the magnetic adjustment connection portion 1221. In other words, the magnetic adjustment ring assembly is drivenly connected to the clutch sleeve 21 via the magnetic adjustment connection portion 1221, resulting in a simple and compact structure. Specifically, a first shaft connection portion 1111 is provided on the outer peripheral wall of the first end of the rotor shaft 111. When the clutch sleeve 21 is in the first position, the second connection portion 212 engages with the first shaft connection portion 1111. And / or, a second shaft connection portion 321 is provided on the outer peripheral wall of the end of the drum shaft 32 proximal to the magnetic gear compound motor. When the clutch sleeve 21 is in either the first or second position, the second shaft connection portion 321 engages with the third connection portion 213. The aforementioned first rotating shaft connection part 1111, second rotating shaft connection part 321, magnetic adjustment connection part 1221, first connection part 211, second connection part 212 and third connection part 213 can all be set to corresponding matching spline types. The meshing connection achieved by the spline is more reliable and stable, and the drive connection is smoother. The spline connection method realizes the drive connection, has a higher connection strength, and improves the connection (drive) stability under large load conditions.

[0033] See also Figure 3 and Figure 4 As shown, the outer cylindrical wall of the clutch sleeve 21 is formed with an annular groove 214 extending along its circumference. The clutch device also includes a drive ring 22 and a clutch drive member 23. The drive ring 22 is loosely mounted within the annular groove 214. Specifically, the annular diameter of the drive ring 22 is larger than the bottom diameter of the annular groove 214 but smaller than the diameter of the notch, and the thickness of the drive ring 22 is smaller than the notch width of the annular groove 214. The clutch drive member 23 is capable of driving the drive ring 22 to reciprocate linearly along the axial direction of the clutch sleeve 21. In this technical solution, the drive ring 22 is loosely mounted within the annular groove 214. This prevents the drive ring 22 from rotating with the clutch sleeve 21 while achieving the purpose of adjusting the force applied to the axial displacement of the clutch sleeve 21. This further simplifies the configuration of the corresponding clutch drive member 23. It is understood that the clutch drive member 23 should be fixedly connected to a fixed structure in the washing machine, for example, it can be fixedly connected to the outer drum wall of the washing machine through a corresponding structure.

[0034] In a preferred embodiment, the clutch drive member 23 is a rotary motor, and the free end of the rotary motor's shaft is threadedly connected to the drive ring 22. Specifically, the free end of the rotary motor's shaft is configured with an external thread, and the drive ring 22 is configured with a corresponding threaded hole. When the rotary motor's shaft rotates, due to the threaded connection between the rotary motor's shaft and the threaded hole, the drive ring 22 will follow the different directions of the rotary motor's shaft rotation or move away from the magnetic gear compound motor, realizing the conversion of rotational displacement into linear displacement, and ultimately achieving the adjustment of the axial displacement of the clutch sleeve 21. The driving structure of the drive ring 22 in this technical solution is simple and compact. Figure 3 As shown, the aforementioned clutch drive members 23 are specifically provided in two sets. These two sets of clutch drive members 23 are arranged symmetrically about the central axis of the clutch sleeve 21 and can be synchronously controlled to rotate in the same direction, thereby achieving smooth displacement adjustment of the drive ring 22. In this case, two force-applying ears can be provided at two symmetrical positions on the drive ring 22, and the aforementioned threaded holes are respectively provided in the force-applying ears.

[0035] According to an embodiment of the present invention, a method for controlling a washing machine is further provided, for controlling the operation of the washing machine, comprising the following steps:

[0036] Get the operating mode of the washing machine, which includes washing mode and dehydration mode;

[0037] The clutch device is controlled to operate according to the acquired operating mode to achieve switching of the drum shaft 32 between a high speed state and a low speed state.

[0038] Specifically, when the operation mode is the washing mode and the clutch device includes the clutch sleeve 21 and the rotary motor, the rotary motor is controlled to rotate along the first rotation direction so that the clutch sleeve 21 is in the second position. At this time, according to the aforementioned structure, the drum shaft 32 is engaged with the first support end cover 122, and the drum shaft 32 rotates at a low speed following the magnetic adjustment ring assembly, while the pulsator shaft 31 rotates at a high speed following the rotor shaft 111. The pulsator shaft 31 and the drum shaft 32 have the same rotation direction, that is, the drum and the pulsator rotate at a differential speed, and the clothes are agitated and washed. Increase the friction between clothes, thereby improving the washing ratio; or, when the operating mode is the dehydration mode and the clutch device includes a clutch sleeve 21 and a rotary motor, control the rotary motor to rotate along the second rotation direction so that the clutch sleeve 21 is in the first position, and the first rotation direction is opposite to the second rotation direction. At this time, according to the aforementioned structure, the drum shaft 32 is engaged with the rotor shaft 111, and the drum shaft 32 and the pulsator shaft 31 both rotate at high speed following the rotor shaft 111, and the pulsator shaft 31 and the drum shaft 32 have the same rotation direction to ensure the dehydration effect.

[0039] It is easy for those skilled in the art to understand that, under the premise of no conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0040] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention. The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art may make various improvements and variations without departing from the technical principles of the present invention, and such improvements and variations shall also be considered within the scope of protection of the present invention.

Claims

1. A washing machine comprising a drum and a pulsator, characterized in that: The invention also includes a magnetic gear compound motor and a clutch device. The magnetic gear compound motor includes a rotor assembly, a magnetic adjustment ring assembly coaxially sleeved outside the rotor assembly, and a stator assembly coaxially sleeved outside the magnetic adjustment ring assembly. The rotor assembly has a rotor shaft (111) whose first end is coaxially connected to a pulsator shaft (31). The pulsator shaft (31) is connected to the pulsator. A roller shaft (32) is sleeved in the outer gap of the pulsator shaft (31). The first end of the roller shaft (32) is connected to the roller. The roller shaft (32) has a rotor shaft for the rotor. The magnetic gear assembly is driven to rotate in a high-speed state and a low-speed state, and the clutch device is used to realize the switching of the roller shaft (32) between the high-speed state and the low-speed state; the clutch device includes a clutch sleeve (21), the clutch sleeve (21) is coaxially spaced and sleeved on the outside of the roller shaft (32), and the clutch sleeve (21) has a first position away from the magnetic gear compound motor and corresponding to the high-speed state and a second position close to the magnetic gear compound motor and corresponding to the low-speed state. The clutch sleeve (21) can be driven to move along the axial direction of the roller shaft (32) to realize the switching of the clutch sleeve (21) between the first position and the second position; the central through hole wall of the clutch sleeve (21) is provided with a first connecting portion (211), a second connecting portion (212) and a third connecting portion (213) along its axial direction, and the first connecting portion (211), the second connecting portion (212) and the third connecting portion (213) are sequentially spaced in a direction away from the magnetic gear compound motor, and at the clutch sleeve (21) When in the first position, the second connecting portion (212) is drivingly connected to the rotor shaft (111), the third connecting portion (213) is drivingly connected to the roller shaft (32), and the first connecting portion (211) is disconnected from the magnetic adjustment ring assembly; when the clutch sleeve (21) is in the second position, the first connecting portion (211) is drivingly connected to the magnetic adjustment ring assembly, the third connecting portion (213) is drivingly connected to the roller shaft (32), and the second connecting portion (212) is disconnected from the rotor shaft (111).

2. The washing machine according to claim 1, wherein The magnetic gear compound motor further comprises a motor housing (14); the rotor assembly, the magnetic adjustment ring assembly and the stator assembly are all assembled in an accommodating space of the motor housing (14); and the second end of the rotor shaft (111) is pivotally supported on a wall of the motor housing (14).

3. The washing machine according to claim 2, characterized in that The magnetic modulation ring assembly includes a modulation core (121) arranged in an annular manner and a first support end cover (122) connected to the first end of the modulation core (121), the first support end cover (122) is rotatably mounted on the rotor shaft (111), and the first support end cover (122) is located on a side of the rotor assembly close to the impeller shaft (31); and / or, a plurality of weight-reducing through holes (141) are constructed on the motor housing (14).

4. The washing machine according to claim 3, characterized in that The magnetic modulation ring assembly further includes a second support end cover (123) connected to the second end of the modulation iron core (121); the second support end cover (123) is rotatably mounted on the rotor shaft (111) and, together with the first support end cover (122), forms a clamp for the modulation iron core (121).

5. The washing machine according to claim 3, characterized in that The first supporting end cover (122) is rotatably fitted onto the rotor shaft (111) via a first through hole, a magnetic adjustment connection portion (1221) is provided around the outer edge of the opening of the first through hole, and when the clutch sleeve (21) is in the second position, the first connection portion (211) is engaged with the magnetic adjustment connection portion (1221).

6. The washing machine according to claim 1, wherein A first rotating shaft connecting portion (1111) is provided on the outer peripheral wall of the first end of the rotor rotating shaft (111), and when the clutch sleeve (21) is in the first position, the second connecting portion (212) is engaged with the first rotating shaft connecting portion (1111); and / or a second rotating shaft connecting portion (321) is provided on the outer peripheral wall of one end of the roller rotating shaft (32) close to the magnetic gear compound motor, and when the clutch sleeve (21) is in the first position or the second position, the second rotating shaft connecting portion (321) is engaged with the third connecting portion (213).

7. The washing machine according to claim 1, wherein An annular groove (214) extending along the circumference of the clutch sleeve (21) is formed on the outer cylindrical wall of the clutch sleeve (21). The clutch device further comprises a drive ring (22) and a clutch drive member (23). The drive ring (22) is gap-mounted in the annular groove (214). The clutch drive member (23) can drive the drive ring (22) to perform reciprocating linear motion along the axial direction of the clutch sleeve (21).

8. The washing machine according to claim 7, characterized in that The clutch drive member (23) is a rotary motor, and the free end of the rotary motor's shaft is threadedly connected to the drive ring (22).

9. A method for controlling a washing machine, characterized in that: Used to control the operation of the washing machine according to any one of claims 1 to 8, comprising the following steps: Get the operating mode of the washing machine; The clutch device is controlled to operate according to the acquired operating mode to achieve switching of the drum shaft (32) between the high speed state and the low speed state.

10. The control method according to claim 9, characterized in that: When the operation mode is a washing mode and the clutch device includes a clutch sleeve (21) and a rotary motor, the rotary motor is controlled to rotate in a first rotation direction so that the clutch sleeve (21) is in a second position; or When the operation mode is the dehydration mode and the clutch device includes a clutch sleeve (21) and a rotary motor, the rotary motor is controlled to rotate along a second rotation direction to place the clutch sleeve (21) in a first position, and the first rotation direction is opposite to the second rotation direction.

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