KR20230122382A - Motor assembly and laundry treating device comprising the same - Google Patents

Abstract

In the motor assembly including a stator and a rotor that electromagnetically interacts with the stator to rotate around a rotation axis according to an embodiment, the rotor comprises a bottom surface centered on the rotation shaft and a stator from the circumference of the bottom surface in a circumferential direction. A rotor frame including a side wall extending to surround a plurality of cores disposed on the side wall along the circumferential direction and a plurality of permanent magnets disposed on the side wall along the circumferential direction and respectively disposed between the plurality of cores, At least some of the plurality of cores include a first surface facing the bottom surface of the rotor frame, a second surface opposite to the first surface, a third surface facing the stator, and a fourth surface opposite to the third surface, , The core includes a first fixing groove opening to the inside of the core on the first and fourth surfaces and a second fixing groove opening to the inside of the core on the second and fourth surfaces, and the rotor frame is inside It may include a continuous part that is formed between the first fixing groove and the second fixing groove so that the filled fixing groove supporting the core and the first fixing groove and the second fixing groove are mutually disconnected, and the core is continuous.

Description

Motor assembly and clothes handling device including the same {MOTOR ASSEMBLY AND LAUNDRY TREATING DEVICE COMPRISING THE SAME}

Various embodiments disclosed in this document relate to a motor assembly and a clothes handling device including the motor assembly.

The motor assembly is a device that rotates the rotor by electromagnetic interaction between the rotor and the stator and provides power to the outside. For example, in the case of a clothes handling apparatus, a shaft connects a rotor and a drum of a motor assembly, and when the motor assembly is driven, the rotor rotates and the drum rotates.

A clothes handling device is a device that performs various tasks for managing clothes, such as washing, drying, deodorizing, or wrinkle removal. A washing machine, one of laundry treatment devices, is a machine that automatically launders laundry such as clothes using electricity, and is configured to perform washing, rinsing, draining, and spin-drying processes according to a user's operation input. In general, a washing machine is a device including a tub containing a certain amount of water and a drum rotatably installed inside the tub. Each washing cycle is performed by rotating the drum containing laundry inside the tub by driving a motor assembly. do.

The motor assembly of the clothes handling device needs to improve driving force and power efficiency in order to rotate the drum at high speed. To realize this, the outer diameter of the motor assembly can be increased, but there is a limit to securing the inner space of the clothes handling device. there was

The external motor assembly may be advantageous in power efficiency compared to the internal motor assembly because the rotor is arranged and rotated to face the outer surface of the stator. Recently, various studies have been conducted to further improve power efficiency while maintaining the volume of the abducted motor assembly.

For example, with respect to the plurality of permanent magnets and/or the plurality of cores constituting the rotor of the motor assembly, factors such as their size, arrangement, or shape are variously implemented, and the magnetic flux of the rotor generated by the rotation of the rotor (magnetic flux) loss can be reduced or power efficiency can be improved.

The technical problem to be achieved through the various embodiments disclosed in this document is not limited to the above-mentioned technical problem, and other technical problems not mentioned are common knowledge in the art to which the invention described in this document belongs from the description below. will be clearly understandable to those who have

In the motor assembly including a stator according to an embodiment of the present document and a rotor that electromagnetically interacts with the stator and rotates about a rotational axis, the rotor includes a bottom surface centered on the rotational axis and a circumference of the bottom surface. A rotor frame including a sidewall extending to surround the stator in a circumferential direction, a plurality of cores disposed on the sidewall along the circumferential direction and disposed on the sidewall along the circumferential direction, between the plurality of cores Each includes a plurality of permanent magnets, and at least some of the plurality of cores have a first surface facing the bottom surface of the rotor frame, a second surface opposite to the first surface, and a first surface facing the stator. It includes three surfaces and a fourth surface opposite to the third surface, and the core includes a first fixing groove and a first fixing groove that opens into the core from the first surface and the fourth surface, and the second surface and the first surface. It includes a second fixing groove opened to the inside of the core from four surfaces, and the fixing groove filled in the rotor frame to support the core and the first fixing groove and the second fixing groove are disconnected from each other. It is formed between the first fixing groove and the second fixing groove and may include a continuous part that is a continuous part of the core.

The laundry handling apparatus according to an embodiment of the present document includes a main body having a tub therein, a drum and a stator rotatably disposed inside the tub, a rotor electromagnetically interacting with the stator to rotate around a rotational axis, and the A motor assembly including a shaft connected to the drum to rotate the drum around the rotation axis, wherein the rotor comprises a bottom surface centered on the rotation axis and the stator from a circumference of the bottom surface in a circumferential direction. A rotor frame including sidewalls extending to surround, a plurality of cores disposed on the sidewalls along the circumferential direction, and a plurality of permanent magnets disposed on the sidewalls along the circumferential direction and disposed between the plurality of cores, respectively. At least some of the plurality of cores include a first surface facing the bottom surface of the rotor frame, a second surface opposite to the first surface, a third surface facing the stator, and the third surface. And a fourth surface opposite to, wherein the core includes a first fixing groove that opens to the inside of the core from the first surface and the fourth surface, and the inside of the core from the second surface and the fourth surface. The first fixing groove and the second fixing groove are disconnected from each other so that the rotor frame includes a second fixing groove that is opened and the fixing groove filled in the rotor frame to support the core and the first fixing groove and the second fixing groove are mutually disconnected. It is formed between the two fixing grooves and may include a continuous portion that is a continuous portion of the core.

According to various embodiments, the motor assembly may improve power efficiency by reducing loss of magnetic flux generated by rotation of the rotor. For example, magnetic flux generated as a plurality of permanent magnets rotate can be prevented from being lost through the structure of the plurality of cores of the rotor.

Alternatively, according to various embodiments, the power efficiency of the motor assembly may be improved by changing the arrangement and/or size of the plurality of permanent magnets while maintaining the entire outer diameter of the motor assembly.

1 is a perspective view of a laundry treatment device according to an embodiment of the present document.
2 is a cross-sectional view of a laundry treatment device according to an embodiment of the present document.
3 is a block diagram for explaining the configuration of a laundry treatment device according to an embodiment of the present document.
4 is an exploded perspective view of a motor assembly according to an embodiment of the present document.
5A is a perspective view of a rotor according to an embodiment of the present document.
5B is a cross-sectional view of a rotor according to one embodiment of the present document.
5C is a cross-sectional perspective view of a rotor according to an embodiment of the present document.
6 is a perspective view of a core of a rotor according to an embodiment of the present document.
7A is a perspective view of a core of a rotor according to an embodiment of the present disclosure.
7B is a perspective view of a core of a rotor according to an embodiment of the present disclosure.
7C is a perspective view of a core of a rotor according to an embodiment of the present disclosure.
7D is a perspective view of a core of a rotor according to an embodiment of the present disclosure.
8A is a perspective view of a rotor core and permanent magnets according to an embodiment of the present disclosure.
8B is a perspective view of a rotor core and permanent magnets according to an embodiment of the present disclosure.
8C is a perspective view of a rotor core and permanent magnets according to an embodiment of the present disclosure.
8D is a perspective view of a rotor core and permanent magnets according to an embodiment of the present disclosure.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. In the description with reference to the accompanying drawings, the same reference numerals are given to the same components regardless of reference numerals, and overlapping descriptions thereof will be omitted.

Various embodiments and terms used therein are not intended to limit the technical features described in this disclosure to specific embodiments, but should be understood to include various modifications, equivalents, or substitutes of the embodiments. In connection with the description of the drawings, like reference numbers may be used for like or related elements. The singular form of a noun corresponding to an item may include one item or a plurality of items, unless the relevant context clearly dictates otherwise. In the present disclosure, “A or B”, “at least one of A and B”, “at least one of A or B”, “A, B or C”, “at least one of A, B and C”, and “A Each of the phrases such as "at least one of , B, or C" may include any one of the items listed together in that phrase, or all possible combinations thereof. Terms such as "first", "secondary", or "first" or "secondary" may simply be used to distinguish that component from other corresponding components, and may refer to that component in other respects (eg, importance or order) is not limited. A (eg, first) component is said to be "coupled" or "connected" to another (eg, second) component, with or without the terms "functionally" or "communicatively." When mentioned, it means that the certain component may be connected to the other component directly (eg by wire), wirelessly, or through a third component.

The term "module" used in various embodiments may include a unit implemented in hardware, software, or firmware, and may be used interchangeably with terms such as logic, logic block, component, or circuit, for example. . A module may be an integrally constructed component or a minimal unit of components or a portion thereof that performs one or more functions. For example, according to one embodiment, the module may be implemented in the form of an application-specific integrated circuit (ASIC).

Various embodiments may be implemented as software (eg, a program) including one or more instructions stored in a storage medium (eg, internal memory or external memory) readable by a machine (eg, an electronic device). can For example, a processor of a device (eg, an electronic device) may call at least one command among one or more commands stored from a storage medium and execute it. This enables the device to be operated to perform at least one function according to the at least one command invoked. The one or more instructions may include code generated by a compiler or code executable by an interpreter. The device-readable storage medium may be provided in the form of a non-transitory storage medium. Here, 'non-temporary' only means that the storage medium is a tangible device and does not contain a signal (e.g. electromagnetic wave), and this term refers to the case where data is stored semi-permanently in the storage medium. It does not discriminate when it is temporarily stored.

According to one embodiment, the method according to various embodiments disclosed in the present disclosure may be included and provided in a computer program product. Computer program products may be traded between sellers and buyers as commodities. A computer program product is distributed in the form of a device-readable storage medium (e.g. compact disc read only memory (CD-ROM)), or through an application store (e.g. Play Store™) or on two user devices (e.g. It can be distributed (eg downloaded or uploaded) online, directly between smartphones. In the case of online distribution, at least part of the computer program product may be temporarily stored or temporarily created in a device-readable storage medium such as a manufacturer's server, an application store server, or a relay server's memory.

According to various embodiments, each component (eg, module or program) of the components described above may include a single object or a plurality of objects, and some of the multiple objects may be separately disposed in other components. . According to various embodiments, one or more components or operations among the aforementioned components may be omitted, or one or more other components or operations may be added. Alternatively or additionally, a plurality of components (eg modules or programs) may be integrated into a single component. In this case, the integrated component may perform one or more functions of each of the plurality of components identically or similarly to those performed by a corresponding component of the plurality of components prior to the integration. . According to various embodiments, operations performed by modules, programs, or other components are executed sequentially, in parallel, iteratively, or heuristically, or one or more of the operations are executed in a different order, omitted, or , or one or more other operations may be added.

Hereinafter, with reference to FIGS. 1 to 8D , a motor assembly according to various embodiments of the present document, a clothes handling device including the motor assembly, and a manufacturing method of the motor assembly will be described in detail.

1 is a perspective view of a laundry treatment device 100 according to an embodiment of the present disclosure.

Referring to FIG. 1 , the laundry treatment device 100 according to an embodiment may include a main body 10 .

In one embodiment, the clothes handling device 100 is a device for managing or cleaning clothes, and may be, for example, a washing machine, a dryer, or a clothes care device. Hereinafter, a washing machine will be described as an example of an embodiment of the laundry treatment apparatus 100, but the actual implementation is not limited thereto, and various types of laundry treatment apparatus 100 may be implemented.

In one embodiment, the laundry treatment device 100 may refer to a device for washing laundry using water and detergent and dehydrating wet laundry. Also, according to an embodiment, the laundry treatment apparatus 100 may perform drying on laundry that has been dehydrated.

In one embodiment, the laundry handling apparatus 100 is mainly provided in the upper part of the main body 10, the inlet 11, and the rotating shaft of the tub 15 is a top-loading method perpendicular to the ground, the main body ( 10) can be classified into a front-loading method in which an inlet 11 is provided on the front side and the rotating shaft of the tub 15 is horizontal to the ground, or a hybrid method combining them. A top-loading washing machine may also be called a 'general washing machine' or a 'top loader washing machine', and a front-loading washing machine may also be called a 'drum washing machine'. Although FIG. 1 shows a front-loading drum washing machine as a reference, the laundry treatment apparatus 100 according to various embodiments is not limited thereto and may be applied.

In one embodiment, the main body 10 forms the exterior of the laundry treatment device 100, and a laundry inlet 11 through which laundry can be put in and taken out of the main body 10 may be provided on the front side of the main body 10. there is. A door 12 may be installed in the laundry inlet 11 to be opened and closed. The laundry handling apparatus 100 may receive laundry into the drum 20 of the tub 15 disposed therein through the inlet 11 .

In one embodiment, an input device 13 such as a plurality of buttons and a rotary lever that can be manipulated by a user is provided on the front of the main body 10, and an input module for receiving a user command for the laundry treatment device 100 ( Example: the input interface 170 of FIG. 2) may be provided. In addition, the front of the main body 10 may include a display 130 for displaying information related to the laundry treatment device 100 and laundry.

In one embodiment, the detergent accommodating unit 14 may supply detergent or fabric softener to the tub 15 of the laundry treatment device 100 . The detergent accommodating unit 14 may transfer detergent to the drum 20 in the process of supplying wash water. For example, when a water supply valve (eg, water supply valve 113 in FIG. 2) is opened and water is supplied to a water supply pipe (eg, water supply pipe 30 in FIG. 2), water is provided to the detergent container 14 and , Detergent or fabric softener accommodated in the detergent container 14 may be mixed with water. Accordingly, water mixed with detergent or fabric softener may be supplied to the tub 15 .

2 is a cross-sectional view of the laundry treatment device 100 according to an embodiment of the present disclosure.

Referring to FIG. 2 , the laundry treatment apparatus 100 may include at least a portion of a tub 15, a drum 20, a water supply pipe 30, and a drain pipe 40.

In one embodiment, the tub 15 may be provided inside the main body 10 of the laundry treatment device 100, and may be formed in a cylindrical shape with an opening toward the laundry inlet 11. The tub 15 may store a predetermined amount of water required for washing. A water reservoir 19 may be included at a lower end of the main body to store wash water leaked from the tub 15 without leaking to the outside.

In one embodiment, the tub 15 is installed on an installation surface (eg, a horizontal surface) of the laundry treatment device 100 so that the front portion of the tub 15 is positioned higher than the rear portion of the tub 15 inside the main body 10. It can be installed at a predetermined angle with respect to.

Specifically, the front part 20a of the drum 20 has a higher position than the rear part 20b of the drum 20, that is, at a predetermined angle (eg, 5 degrees, 15 degrees, or 30 degrees) with respect to the horizontal plane. Figure) can be installed to have. However, it is not limited thereto, and the front part 20a and the rear part 20b of the drum 20 may be installed to have a non-tilting angle (eg, 0 degree).

In one embodiment, the drum 20 may be installed inside the tub 15 at the same angle as the water tank. Here, the front part may refer to a surface having an opening formed in the same direction as the inlet 11 of the main body 10 through which laundry is put, and the rear part may refer to a surface opposite to the front part. Alternatively, the tub 15 may be disposed not inclined, so that the rotation axis of the drum 20 may be provided in a direction parallel to the ground.

In one embodiment, the drum 20 is installed inside the tub 15, is implemented in a substantially cylindrical shape, and may form a space for accommodating the loaded laundry and washing the laundry. An opening corresponding to the laundry input port 11 is provided on the front side of the drum 20 so that laundry can be put into the drum 20 .

In one embodiment, a plurality of through-holes 25 may be formed in the drum 20, and through the plurality of through-holes 25, wash water inside the drum 20 may escape and be drained to the external drain pipe 4. . For example, during the water supply cycle of the laundry treatment apparatus 100 , wash water supplied from the external water supply pipe 3 may be supplied into the tub 15 through a nozzle connected to the water supply pipe 30 . During the spin-drying cycle of the laundry treatment device 100, the drum 20 is rotated at high speed by the motor assembly 112, and the washing water inside the drum 20 is removed by the centrifugal force of the rotation of the drum 20. ) can escape to the outside of the drum 20 through a plurality of through holes 25, and wash water received in the space between the outer wall of the drum 20 and the inner wall of the tub 15 flows to the outside along the drain pipe 40. It can be drained into the drain pipe (4).

In one embodiment, the drum 20 may be rotatable with respect to a rotating shaft 112a (eg, the shaft 205 of FIG. 4 ). The rotational RPM of the drum 20 may vary depending on the use of the laundry handling device 100, the stroke in progress, and the performance of the motor assembly 112, and for example, the drum 20 rotates 1000 to 3000 times per minute. can do. A motor assembly 112 of the drive unit 110 for rotating the drum 20 and a rotation shaft 112a may be installed on the rear surface of the tub 15 . The tub 15 may further include a suspension device (not shown) for damping vibration generated when the drum 20 is rotated. When the drum 20 is rotated by the motor assembly 112, dirt from the laundry put into the drum 20 may be removed from the laundry while rubbing against water stored in the tub 15.

In one embodiment, a spray nozzle 17 may be formed in the inlet area 21 of the tub 15, and the spray nozzle 17 is connected to the water supply pipe 30 to supply wash water to the inside of the drum 20. can be connected to A drain pipe 40 for draining wash water may be connected to one lower side of the tub 15 . Wash water refers to general water, but may refer to a mixture that further includes detergents or contaminants in addition to water.

In one embodiment, the rear part 20b of the drum 20 may be coupled to the rotating shaft 112a of the driving unit 110 installed on the rear part of the tub 15 . The drum 20 may receive power (eg, rotational force) generated from the motor assembly 112 of the drive unit 110 through the rotating shaft 112a and rotate in the axial direction of the rotating shaft 112a.

In one embodiment, the laundry treatment apparatus 100 may include a water supply pipe 30 for supplying water to the tub 15 and the drum 20 . The water supply pipe 30 is connected to the external water supply pipe 3 of the faucet and may include a water supply valve 113 that opens and closes the water supply pipe 30 . The water supply pipe 30 connects the external water supply pipe 3 and the tub 15 or the drum 20, and is a flow path connected to supply wash water from the external water supply pipe 3 to the tub 15 or the drum 20. can The water supply pipe 30 may be formed as a pair to supply cold water and hot water.

In one embodiment, the detergent receiving unit 14 may supply detergent to the drum 20, and the detergent may be delivered to the drum 20 by the water supply pipe 30. For example, the water supply pipe 30 supplies washing water supplied from the external water supply pipe 3 to the inside of the drum 20 along with washing water and detergent filled in the detergent container 14 via the detergent container 14. can The detergent accommodating part 14 is a detergent supply valve (for example, the detergent supply valve 118 of FIG. 3) that opens and closes the detergent accommodating part 14 and a detergent supply valve connecting the detergent accommodating part 14 and the drum 20. Including the second water supply pipe 32, it is possible to control the detergent supplied into the drum 20.

In one embodiment, the drain pipe 40 may refer to a flow path connected to connect the tub 15 and the external drain pipe 4 to drain the wash water filled in the drum 20 to the external drain pipe 4. . The drain pipe 40 may be connected to a pump 115 for flowing wash water in the drum and a drain valve 114 that opens and closes to drain or maintain the wash water in the drum 20 . The processor 140 may control the pump 115 and the drain valve 114 to drain the wash water from the drum 20 to the outside or to circulate it back to the drum. When the drain valve 114 is closed and the pump 115 is driven to control the circulation of the wash water, the fluidity of the wash water in the drum 20 is increased, the wash water is evenly delivered to the laundry, and washing performance can be improved.

In one embodiment, the driving unit 110 may drive the overall operation of the laundry treatment device 100 . The driving unit 110 may rotate the drum 20 or the pulsator (not shown) and may drive the heat exchanger 190 or the heater 116 . The laundry treatment apparatus 100 may receive an input signal from a user and perform a plurality of unit strokes of the laundry treatment apparatus 100 through the driver 110 . The plurality of unit cycles may include a water supply cycle, a washing cycle, a rinse cycle, a spin cycle cycle, or a drain cycle.

3 is a block diagram for explaining the configuration of the laundry treatment device 100 according to an embodiment of the present disclosure.

Referring to FIG. 3 , the clothes handling apparatus 100 may include at least a portion of a driving unit 110 , a sensor unit 120 , and a processor 140 .

In one embodiment, the driving unit 110 is a component for performing overall mechanical operations of the laundry treatment device 100 and may perform operations under the control of the processor 140 . The driver 110 may include a power supply 111 and a motor assembly 112 to rotate the drum (eg, the drum 20 of FIG. 2 ) of the laundry treatment device 100 .

In one embodiment, the power supply device 111 may be a device that provides power to the motor assembly 112 and controls speed and torque of the motor assembly 112 . The power supply 111 may control the speed of the motor assembly 112 according to a control signal of the processor 140, and the power supply 111 uses a voltage control method or a frequency conversion method to control the motor assembly 112 ) to control the speed.

In one embodiment, the power supply 111 may be controlled by an intelligent power module (IPM) configured as a switching device. The intelligent power module is a power module to which a protection function is added to protect a power device or driving circuit, and in the power supply device 111 that controls the motor assembly 112, the power supply device 111 is caused by overheating due to an increase in load. ) and components of the clothes handling device 100 may be prevented from being damaged.

In one embodiment, motor assembly 112 may rotate drum 20 . The motor assembly 112 may refer to a prime mover that converts externally applied energy (eg, electric power) into power energy. For example, motor assembly 112 may transfer power energy to a shaft (eg, shaft 205 in FIG. 4 ) that is a rotational axis (eg, rotational axis 112a in FIG. 2 ), and shaft 205 is a motor assembly. 112 and the drum 20 may be coupled to transmit power transmitted from the motor assembly 112 to the drum 20 to rotate the drum 20. The structure of the motor assembly 112 according to various embodiments of the present document will be described with reference to the drawings in FIG. 4 or later.

In one embodiment, the drive unit 110 may include at least some of a water supply valve 113, a drain valve 114, a pump 115, a water jet 117, and a detergent supply valve 118.

In one embodiment, the water supply valve 113 may be opened and closed to supply or shut off wash water into the drum 20 under the control of the processor 140 . The water supply valve 113 may be implemented as a solenoid valve or an all-permanent magnetic valve that can be opened and closed by the movement of a coil according to the applied current.

In one embodiment, the water supply valve 113 may be installed between an external water supply pipe (eg, external water supply pipe 3 of FIG. 2 ) and a water supply pipe of the laundry treatment device 100 (eg, water supply pipe 30 of FIG. 2 ). there is. The water supply pipe 30 of the laundry treatment apparatus 100 connects the external water supply pipe 3 and the drum 20, and when the water supply valve 113 is in an on state, wash water flows along the water supply pipe 30 to the drum ( 20) can be supplied inside. That is, the water supply valve 113 may be controlled to supply or shut off wash water from the external water supply pipe 3 to the inside of the drum 20 according to the state (on or off) of the water supply valve 113 .

For example, the water supply pipe 30 includes a first water supply pipe 31 connecting between the external water supply pipe 3 and the detergent accommodating part 14, the detergent accommodating part (eg, the detergent accommodating part 14 of FIG. 2) and the drum. (20) may include a second water supply pipe (eg, the second water supply pipe 32 of FIG. 2) connecting between them. The washing water supplied from the external water supply pipe 3 passes through the detergent supply valve 118 and the detergent accommodating part 14, so that the washing water and detergent filled in the detergent accommodating part 14 can be supplied to the inside of the drum 20. there is.

In one embodiment, the drain valve 114 may be opened and closed so that the washing water filled in the drum 20 is drained or maintained under the control of the processor 140 . The drain valve 114 may be implemented as a solenoid valve or an all-permanent magnetic valve that can be opened and closed by movement of a coil according to an applied current.

In one embodiment, the drain valve 114 may be installed between a drain pipe (eg, drain pipe 40 of FIG. 2 ) and an external drain pipe (eg, external drain pipe 4 of FIG. 2 ) of the laundry treatment device 100 . Here, the drain pipe 40 of the laundry treatment device 100 connects the drum 20 and the external drain pipe 4, and when the drain valve 114 is in an on state, the drum 20 Washing water filled inside may be drained to the external drain pipe 4 along the drain pipe 40. That is, the drain valve 114 may be drained from the inside of the drum 20 according to the state (on or off) of the drain valve 114. The external drain pipe 4 can be controlled to drain or retain the washing water.

In one embodiment, the pump 115 may discharge wash water filled in the drum 20 to the external drain pipe 4 using power or pressure under the control of the processor 140 . To this end, the pump 115 may be installed between the drain pipe 40 and the external drain pipe 4.

In one embodiment, the pump 115 includes a shaft (not shown) having an impeller (not shown), an electric motor (not shown) mechanically connected to the shaft, a suction pipe (not shown) connected to the drain pipe 40, and an external drain pipe. It may include a discharge pipe connected to (4), and when the impeller is rotated by the electric motor of the pump 115 when the drain valve 114 is turned on, the washing water in the drum 20 passes through the suction pipe and the discharge pipe. It can be forced out to the external drain pipe (4). In addition, the processor 140 may circulate the wash water in the drum 20 by driving the pump 115 while the drain valve 114 is off.

In one embodiment, the heater 116 may boil laundry or wash the drum 20 by heating the wash water filled inside the drum 20 . In one embodiment, when power is applied under the control of the processor 140, the heater 116 converts applied electrical energy into thermal energy to heat the wash water in the drum 20.

In one embodiment, the water jet 117 may include a water jet pump (not shown) and a nozzle (not shown), and the water introduced by the water jet pump (not shown) may be sprayed at high pressure through the nozzle. And, by spraying to a specific location inside the drum 20, contaminants remaining inside the drum 20 can be removed. In this case, the water jet 117 is implemented as a device separate from the spray nozzle 17 for supplying wash water to the inside of the drum 20, or the water jet 117 is implemented as a device integrated with the spray nozzle 17. Implementation is also possible.

In one embodiment, the detergent supply valve 118 may open and close the detergent container 14 and automatically control the detergent supplied into the drum 20 . The laundry treatment device 100 may be implemented to include a detergent supply device (not shown) by including a detergent supply valve 118, a detergent container 14, or a detergent sensor (not shown). The detergent supply device (not shown) can receive and store a certain amount of detergent, and when the laundry treatment device 100 is operated, the amount of detergent required is calculated by the processor 140 and the detergent supply valve 118 is opened, A certain amount of detergent may be automatically provided to the drum 20 . Therefore, the user can conveniently supply an appropriate amount of detergent by a supply device (not shown) without having to change and add the detergent for each operation of the laundry treatment device 100 .

In one embodiment, the heat exchanger 190 may condense or expand the refrigerant, dry or heat the air passing through the heat exchanger 190, and provide the high-temperature dried gas to the drum 20.

In one embodiment, the cleaning device 195 may clean internal parts of the laundry treatment device 100, such as a filter, a nozzle, or the heat exchanger 190. The cleaning device 195 may prevent deterioration or performance deterioration of internal parts due to long-term use of the laundry treatment device 100 .

In one embodiment, the sensor unit 120 may detect an operating state of the clothes handling device 100 or a surrounding environment, and may generate and output an electrical signal based on the detection result. The sensor unit 120 may transmit an electrical signal to the processor 140 or store a detection result in the memory 150 of the laundry treatment device 100 or in an external device.

For example, the sensor unit 120 senses an operating state of the clothes handling device 100 or a surrounding environment while a washing course is being performed to generate an electrical signal or obtain data, and the processor 140 detects the sensor unit 120 ) to obtain diagnostic information by processing the received signal or data.

In one embodiment, each sensor included in the sensor unit 120 may be implemented as a physically separated and separate device, or each sensor may be implemented as a single device. That is, the sensor unit 120 is not limited to being implemented as a single physical device. The sensor unit 120 transmits the sensed value to the processor 140, and the processor 140 may control the operation of the laundry treatment device 100 based on the sensed value, or the memory 150 as diagnostic information. ), or transmitted to an external device (eg, server, smartphone) through the communication interface 160 and stored in the external device.

In various embodiments, the sensor unit 120 may include at least some of a speed sensor 120-1, a weight sensor 120-2, and a temperature sensor 120-3.

In one embodiment, the speed sensor 120-1 may detect the rotational speed, rotational angle, and rotational direction of the motor assembly 112 or the drum 20. The processor 140 calculates the rotational speed, rotational angle, and rotational direction of the motor assembly 112 or the drum 20 detected by the speed sensor 120-1 and controls the operation of the laundry treatment device 100 based on the calculated rotational speed. You can control it.

In one embodiment, the speed sensor 120-1 detects the size of the load applied to the motor assembly 112 when the motor assembly 112 rotates the drum 20, the rotor of the motor assembly 112 A method of detecting the on/off signal of a hall sensor adjacent to the position of the rotor during rotation or a method of measuring the magnitude of current applied to the drive unit 110 or motor assembly 112 while the drum 20 rotates. It can be implemented as a sensor.

In one embodiment, the weight sensor 120-2 may detect the weight of the drum 20. In addition, the weight sensor 120-2 detects the weight of the laundry and the drum 20 when laundry is present inside the drum 20, and detects a difference between the detected weight and the stored weight of the drum 20 as the weight of the laundry. The weight of the laundry accommodated in the drum 20 can be sensed by estimating the weight.

In one embodiment, the weight sensor 120 - 2 may obtain diagnostic information by detecting the weight of the drum 20 by rotating the drum 20 without laundry. To this end, the weight sensor 120-2 estimates the moment of inertia from the rotational speed and rotational angle of the motor assembly 112 or drum 20 detected through the aforementioned speed sensor 120-1 and responds to the moment of inertia. The weight of the drum 20 may be sensed by using a method of estimating the weight of the drum 20 .

The weight sensor 120-2 of various embodiments changes the shape of the load cell when the weight of the drum 20 is applied to the load cell, detects the size of the voltage according to the changed shape, and detects the size of the drum corresponding to the size of the voltage. It can be implemented with various sensors, such as estimating the weight of (20).

In one embodiment, the temperature sensor 120-3 is an external temperature sensor that detects the temperature of the surrounding environment of the laundry treatment device 100, or the temperature of wash water in the tub 15, the temperature of the heater 116, and power. It may be an internal temperature sensor that senses the temperature of the inside of the laundry treatment device 100, such as the temperature of the supply device 111.

In one embodiment, the temperature sensor 120-3 may be implemented as a thermistor, which is a type of resistor using the property that the resistance of a material changes according to temperature. It may have a negative temperature coefficient (NTC) characteristic in which resistance increases when the temperature decreases.

In one embodiment, the temperature sensor 120-3 may be a temperature sensor that senses the temperature of the heater 116 or wash water. The temperature sensor 120-3 may further include a temperature control device (eg, a thermostat), and the temperature control device detects the amount of heat generated in the heat exchanger 190 and uses the heat generated from the heater 116 to wash the laundry. The temperature of the water or drum 20 can be controlled to maintain it at a specific temperature.

The sensor unit 120 of one embodiment is not limited to the above-described configuration, but includes a water level sensor for detecting the level or flow rate of washing water, a detergent sensor for detecting the type or remaining amount of detergent, a leak sensor for detecting leakage of wash water, A humidity sensor for detecting humidity in the air, a turbidity sensor for detecting turbidity of washing water, a door sensor for detecting whether the door 12 is opened or closed, a vibration sensor for detecting the degree of vibration of the clothes handling device 100, and a water supply valve 113 or a valve sensor for detecting an operation of the drain valve 114 may be further included.

In one embodiment, the sensor unit 120 may include the weight of the drum 20, whether or not the water supply valve 113 for supplying wash water is abnormal, the temperature of the wash water, the flow rate of the wash water supplied to the drum 20, Whether or not the motor assembly 112 is abnormal, whether or not the drain valve 114 for draining wash water is abnormal, the flow rate of wash water drained from the drum 20, or the vibration of the laundry treatment device 100 may be detected. Therefore, the sensor unit 120 can help improve the washing cycle and wash performance of the laundry treatment apparatus 100 and can detect whether the laundry treatment apparatus 100 is operating abnormally.

In an embodiment, the display 130 may display diagnostic information acquired through the sensor unit 120 on the display area under the control of the processor 140 . The display 130 is disposed on the front surface of the housing of the laundry treatment apparatus 100 so that the user can check the driving status of the laundry treatment apparatus 100 . Alternatively, the display 130 may be implemented in an external form instead of being built inside the laundry treatment apparatus 100, and image data may be displayed on an external display connected to the laundry treatment apparatus 100 by wire or wirelessly. .

In one embodiment, the processor 140 may control overall operations of the laundry treatment device 100 . To this end, the processor 140 may include at least some of RAM, ROM, a graphic processing unit, a main CPU, and first to n interfaces or buses.

In one embodiment, when a user command is received, the processor 140 may operate the driving unit 110 and perform the washing process step by step based on the input signal. While the laundry treatment apparatus 100 is being driven, a driving state of the laundry treatment apparatus 100 is sensed through the sensor unit 120, and based on this, the processor 140 provides feedback on driving of the laundry treatment apparatus 100 or , diagnostic information may be obtained and displayed on the display 130 .

In one embodiment, the memory 150 may store various instructions, programs, or data necessary for the operation of the clothes handling device 100 or the processor 140 . Information acquired by the sensor unit 120 and data received from an external electronic device may be stored in the memory 150 .

In one embodiment, the memory 150 is accessed by the processor 140, and data may be read/written/modified/deleted/updated by the processor 140. Therefore, in describing the present disclosure, the term 'memory' may include the memory 150 , RAM or ROM in the processor 140 , or a memory card mounted in the laundry treatment device 100 .

In one embodiment, the memory 150 includes volatile memory such as static random access memory (S-RAM) and dynamic random access memory (D-RAM), flash memory, read only memory (ROM), and erasable programmable read only (EPROM). Memory), non-volatile memory of EEPROM (Electrically Erasable Programmable Read Only Memory), hard disk drive (HDD), or solid state drive (SSD).

In one embodiment, the processor 140 and the memory 150 may be implemented as physically separate components, or may be implemented as a single component such that the processor 140 includes the memory 150. Also, the processor 140 may be implemented as a single system or a plurality of components. The memory 150 may also be implemented as a single system or a plurality of structures.

In one embodiment, the communication interface 160 may transmit and receive various types of data by communicating with an external device (eg, a server, a smartphone) according to various types of communication methods. For example, the communication interface 160 transmits information acquired by the sensor unit 120 to a server (or smartphone) or transmits a control command for driving the clothes handling device 100 to a server (or smartphone). can be received from

In one embodiment, the communication interface 160 may include at least one of a Bluetooth chip, a Wi-Fi chip, a wireless communication chip and an NFC chip performing wireless communication, an Ethernet module and a USB module performing wired communication. In this case, an Ethernet module or a USB module performing wired communication may communicate with an external device through an input/output port.

In one embodiment, the input interface 170 is configured to receive various types of user commands from a user, and the received user commands may be transmitted to the processor 140 . To this end, the input interface 170 may include an input device 13 such as a touch panel or keys, a plurality of control buttons, and a rotation lever.

In one embodiment, the speaker 180 is built into the clothes handling device 100, and various notification sounds as well as various audio data on which various processing tasks such as decoding, amplification, and noise filtering have been performed by an audio processing unit (not shown). or voice messages can be directly output as sound.

Hereinafter, a washing course of the laundry treatment apparatus 100 will be briefly described in relation to the above-described structure of the laundry treatment apparatus 100 and the operation of the processor 140 .

In one embodiment, when a user command for managing the laundry treatment apparatus 100 is received, the processor 140 may supply wash water to the drum 20 as a water supply operation. Specifically, the processor 140 may control the water supply valve 113 to be opened by changing the water supply valve 113 in an off state to an on state, thereby supplying wash water to the drum 20 .

In this case, the processor 140 may adjust the amount of wash water supplied to the drum 20 by adjusting the time for which the water supply valve 113 is maintained in an on state. At this time, the amount of wash water supplied in the washing course may be determined based on the capacity of the drum 20 . For example, the amount of wash water supplied in the washing course may be determined as a maximum amount that the drum 20 can accommodate or an amount at a preset ratio. In addition, the processor 140 may adjust the temperature of the wash water supplied to the drum 20 by adjusting the time for which the water supply valve 113 for cold water and hot water is maintained in an on state. The processor 140 may control the temperature of the washing water by driving the heater 116 .

In one embodiment, when a predetermined amount of wash water is supplied to the drum 20, the processor 140 may control the water supply valve 113 to be closed by changing the on-state water supply valve 113 to an off state. , Accordingly, the supply of washing water may be stopped. When the supply of wash water is stopped and the water supply operation is completed, the processor 140 may control the driving unit 110 to rotate the drum 20 filled with wash water as a washing operation.

In one embodiment, the processor 140 may apply a control signal for rotating the drum 20 filled with wash water to the motor assembly 112 of the driving unit 110 to the power supply device 111, and the power supply device 111 may rotate the motor assembly 112 according to the applied control signal and transmit rotational force to the drum 20 to rotate the drum 20 . Also, the processor 140 may control the water jet 117 to spray high-temperature, high-pressure wash water in order to remove contaminants adhered therein to the drum 20 and the laundry. When the washing process is completed, the processor 140 may drain the wash water filled in the drum 20 as a drain process. Specifically, the processor 140 may control the drain valve 114 to open by changing the drain valve 114 in an off state to an on state, and accordingly, the wash water filled in the drum 20 may be drained to the outside. there is. Also, the processor 140 may control the pump 115 to discharge the wash water filled in the drum 20 to the external drain pipe 4 using power or pressure.

In one embodiment, the processor 140 may control the driving unit 110 to rotate the drum 20 as a spin-drying process. The power supply 111 drives the motor assembly 112 according to the applied control signal and transmits rotational force to the drum 20 to rotate the drum 20. The control signal moves the motor assembly 112 step by step. As a signal for driving, it may be a signal for driving the motor assembly 112 at a decelerated, accelerated, or maintained rotational speed over time.

In the above-described embodiment, it has been described that the draining process and the dehydrating process are performed separately, but this may be a part of various processes, and the draining process and the dehydrating process may be simultaneously performed, or the draining process may be performed after the dehydration process.

4 is an exploded perspective view of the motor assembly 200 according to an embodiment of the present document.

Referring to FIG. 4 , a motor assembly 200 (eg, the motor assembly 112 of FIGS. 2 and 3 ) according to various embodiments may include a stator 210 and a rotor 220 .

In one embodiment, the motor assembly 200 may be a permanent magnet synchronous motor in which the rotor 220 includes permanent magnets 225 . In one embodiment, the motor assembly 200 may include a stator 210 and a rotor 220. In the motor assembly 200, a coil 217 disposed to surround the stator 210 and a permanent magnet 225 disposed on the rotor 220 may electromagnetically interact to generate power.

For example, when a current is applied to the coil 217, the coil 217 and the plurality of permanent magnets 225 may electromagnetically interact to rotate the rotor 220, and the shaft 205 may rotate the rotor 220. By connecting the external device and the motor assembly 200 can generate power for rotating the external device. Hereinafter, a drum (eg, drum 20 of FIGS. 1 to 2 ) of a laundry treatment device (eg, laundry treatment device 100 of FIGS. 1 to 3 ) is an external device to which the motor assembly 200 transmits power. ) is described as an example, but is not limited thereto in actual implementation, and may be implemented for various devices such as a fan (not shown) or a wheel (not shown).

In one embodiment, the motor assembly 200 may be an abducted motor assembly 200 in which the stator 210 is located at the center and the rotor 220 is located so as to surround the stator 210 so that the rotor 220 rotates. . Compared to the internal type motor assembly 200 of the external type, the diameter of the rotor 220 in the circumferential direction may be relatively large, and torque density and power density may be high.

In one embodiment, the stator 210 may have an annular structure, and the stator 210 includes a central region 211 adjacent to the rotational axis R (eg, rotational axis 112a of FIG. 2 ) and a central region 211 It may include a plurality of tooth regions 213 extending in a direction (eg, a U-V plane direction) horizontal to the rotation axis R from the tooth region 213 .

In one embodiment, the clutch module 207 may be coupled to the central region 211 of the stator 210, and the stator core 215 and the stator core 215 are covered on each of the plurality of tooth regions 213. A coil 217 wound around the insulator 216 in a direction surrounding the insulator 216 and the stator core 215 may be included.

In one embodiment, the insulator 216 may support various parts of the stator 210 and may be made of an insulator to prevent current loss. In one embodiment, in the coil 217, a conductive wire may be repeatedly wound around the outer circumferential surface of the stator core 215, or the coil 217 may be implemented in a form in which a conductive plate surrounds the stator core 215. can

In one embodiment, a portion of the insulator 216 may be opened to expose the stator core 215 in an area corresponding to an outer circumferential surface in one direction opposite to the rotation axis R in the plurality of tooth areas 213. . The exposed area of the stator core 215 may face the permanent magnets 225 of the rotor 220 at predetermined intervals.

In one embodiment, the power supply unit 203 may receive power from the outside (eg, the power supply device 111 of FIG. 2 ) and apply current to the coil 217 . In one embodiment, the coil 217 may be formed of a three-phase coil group, and the power supply unit 203 applies current to the coil 217 in an alternating current form so that the coil 217 and the rotor 220 are electromagnetically can interact with each other to generate electromagnetic force.

In one embodiment, the rotor 220 may include a rotor frame 230 , a plurality of cores 221 and a plurality of permanent magnets 225 . The rotor frame 230 may have a cylindrical shape having an open interior to accommodate the stator 210 therein and to rotate around the rotation axis R. For example, the rotor frame 230 is centered on the rotational axis R, and the rotor ( 220 may include a side wall 235 extending to surround the circumferential direction.

In one embodiment, the plurality of cores 221 and the plurality of permanent magnets 225 may be disposed inside the sidewall 235 of the rotor frame 230 and supported by the rotor frame 230 . The plurality of permanent magnets 225 may be arranged to face the stator core 215 of the stator 210 and may interact with the coils 217 and the stator core 215 of the stator 210 electromagnetically. In one embodiment, the outer ring 250 may be arranged to surround the rotor frame 230 . The structure of the rotor 220 according to various embodiments of the present document will be described in detail with reference to the drawings below in FIG. 5A.

In one embodiment, the shaft 205 rotates around the rotation axis R of the motor assembly 200, and may transmit power to the drum 20. For example, the shaft 205 may be coupled to the rear portion of the drum 20 (eg, the rear portion 20b of FIG. 2), and transmits power according to the driving of the motor assembly 200 to the drum 20. The drum 20 can be rotated.

In one embodiment, when the clothes handling device 100 includes a pulsator (not shown), the drum 20 may include a pulsator (not shown) installed on an inner bottom surface and coupled to the shaft 205 In addition, the motor assembly 200 may transmit power to the pulsator (not shown) through the shaft 205 to rotate the pulsator (not shown).

In various embodiments, the clutch module 207 may include at least a portion of a clutch and a reduction gear module between the rotor frame 230 and the stator 210 . In one embodiment, the clutch module 207 may change a connection state between the reduction gear module and the motor assembly 200 by driving the clutch. The clutch module 207 can change the rotational state of the shaft 205 in the motor assembly 200 including the single shaft 205, for example, rotational speed or rotational torque.

The structure and driving of the motor assembly 200 described above is an exemplary description for implementing the motor assembly 200 according to various embodiments of the present document, and may not be limited thereto in actual implementation, and the motor assembly actually implemented The configuration and driving of the parts of 200 can be modified and implemented differently.

5A is a perspective view of a rotor 220 according to an embodiment of the present document, FIG. 5B is a cross-sectional view of the rotor 220 according to an embodiment of the present document, and FIG. 5C is a rotor according to an embodiment of the present document. It is a cross-sectional perspective view of (220).

In detail, FIG. 5B is a cross-sectional view of the rotor 220 viewed in one direction (eg, +W direction) based on the line A-A′ shown in FIG. 5A, and FIG. 5C is a cross-sectional view of B-B shown in FIG. It is a cross-sectional perspective view of the rotor 220 viewed in one direction (eg, -V direction) based on the 'line.

5A to 5C , a rotor 220 according to various embodiments includes a rotor frame 230, a serration 233, a plurality of cores 221, a plurality of permanent magnets 225, and an outer ring 250. ) may include at least some of them.

In one embodiment, the rotor frame 230 may be a housing that accommodates and supports at least some of the serrations 233, the plurality of permanent magnets 225, and the plurality of cores 221 therein. In one embodiment, the rotor frame 230 may be mold-injected in a state in which parts therein are disposed, and formed into a single body.

In one embodiment, the rotor frame 230 may be formed to accommodate a stator therein (eg, the stator 210 of FIG. 4 ). The rotor frame 230 extends in one direction (eg, -W direction) to surround the rotor 220 in the circumferential direction from the bottom surface 231 centered on the rotation axis R and the circumference of the bottom surface 231. It may include sidewalls 235 . For example, the rotor frame 230 has a cylindrical shape with one surface open so that the rotor 220 is coupled, or the rotor frame 230 has a sidewall 235 extending in the circumferential direction with respect to the bottom surface 231. may have a circular structure.

In one embodiment, the side wall 235 of the rotor frame 230 includes an inner surface 235a facing the direction of the rotation axis R or the center direction, an outer surface 235b opposite to the inner surface 235a, and an inner surface ( It may include an upper surface 235c extending from 235a) to the outer surface 235b. In one embodiment, a plurality of mold holes 235d may be formed on the upper surface 235c. The plurality of mold holes 235d may be opened through at least a partial region of the sidewall 235 from the upper surface 235c, and the plurality of mold holes 235d may be formed in the pin member in the injection process of the rotor frame 230. and may be formed on the upper surface 235c corresponding to the positions of the plurality of cores 221 .

In one embodiment, serrations 233 and spokes 234 may be formed on the bottom surface 231 of the rotor frame 230, and a plurality of cores may be formed on the sidewalls 235 of the rotor frame 230. 221 and a plurality of permanent magnets 225 may be arranged.

In one embodiment, the serrations 233 may connect the shaft 205 and the rotor 220 such that the shaft 205 rotates in conjunction with the rotor 220 . The serrations 233 may have a cross-sectional structure corresponding to the cross-section of the connection region 205a of the shaft 205 so that the shaft 205 is fixed.

In one embodiment, the serrations 233 may be formed on the bottom surface 231 of the rotor frame 230, and the shaft 205 may be coupled to the serrations 233. In one embodiment, the shaft 205 may be connected to the rotor frame 230 in a direction opposite to the direction in which the sidewall 235 extends (eg, the +W direction). In various embodiments, the serration 233 may have a structure that is bent in a circumferential direction surrounding the rotational axis R, and for example, the serration 233 has a plurality of sawtooth cross sections having a substantially triangular shape. It can have a continuous structure.

In one embodiment, the spokes 234 may have a structure that radiates in a circumferential direction around the serrations 233 and is inclined. The spokes 234 can disperse external forces so that the rotor frame 230 is not damaged, and the spokes 234 are provided with heat dissipation holes 234a to dissipate heat generated from the rotor 220 and the stator 210 to the motor assembly ( 200) can be released to the outside.

In one embodiment, the plurality of cores 221 and the plurality of permanent magnets 225 may be respectively disposed in the insertion grooves 210a and 220b inside the side wall 235 . For example, the side wall 235 includes a plurality of first insertion grooves 220a formed therein and a plurality of second insertion grooves 220b respectively disposed between the plurality of first insertion grooves 220a, The plurality of cores 221 may be formed in the plurality of first insertion grooves 220a, and the plurality of permanent magnets 225 may be formed in the plurality of second insertion grooves 220b.

In one embodiment, the plurality of first insertion grooves 220a and the plurality of second insertion grooves 220b may be arranged outside the stator 210 in a circumferential direction. In one embodiment, the plurality of second insertion grooves 220b may be a space in which a permanent magnet 225 is disposed between each of the plurality of cores 221 . In various embodiments, the first insertion groove 220a and the second insertion groove 220b place the plurality of cores 221 and the plurality of permanent magnets 225 inside the mold in the injection molding step of the rotor frame 230. Then, it may be a space formed by injecting the material of the rotor frame 230 into a mold.

In one embodiment, the plurality of second insertion grooves 220b may be formed between the inner surface 235a and the outer surface 235b of the side wall 235 so as to be wrapped around the inner surface 235a and the outer surface 235b. The plurality of first insertion grooves 220a may be open in the direction of the inner surface 235a of the side wall 235 and closed in the direction of the outer surface 235b.

In one embodiment, the plurality of cores 221 may stably support the plurality of permanent magnets 225 and improve electromagnetic force generated by electromagnetic interaction between the rotor 220 and the stator 210 . In one embodiment, the plurality of cores 221 may be disposed on the sidewall 235 along the circumferential direction.

In various embodiments, the plurality of cores 221 may be rotor cores or rotor core segments distinct from the stator core 215. Hereinafter, for convenience of explanation, the core 221 of the stator 210 is referred to as a 'stator core'. 215', the core 221 of the rotor 220 is described as 'a plurality of cores 221' to 'core 221'.

In one embodiment, the plurality of cores 221 are circumferentially surrounding the stator 210 to form a plurality of second insertion grooves 220b in which the plurality of permanent magnets 225 are spaced apart from each other. They may be spaced apart from each other. For example, a second insertion groove 220b may be formed between the two cores 221 spaced apart from each other, and at least one permanent magnet 225 may be disposed in the second insertion groove 220b.

In one embodiment, the plurality of permanent magnets 225 may be disposed on the sidewall 235 along the circumferential direction and may be respectively disposed between the plurality of cores 221 . Each of the plurality of permanent magnets 225 may be spaced apart from each other, and the plurality of cores 221 and the plurality of permanent magnets 225 may be alternately disposed.

In one embodiment, the plurality of permanent magnets 225 may interact electromagnetically with the stator 210 and may form a magnetic force. In various embodiments, the plurality of permanent magnets 225 may have an arc shape radiating around the rotation axis R. The plurality of permanent magnets 225 may be arranged in a circumferential direction such that S poles and N poles are alternately disposed in a direction facing the rotor 220 .

In one embodiment, electromagnetic force of the plurality of permanent magnets 225 may be formed in a circumferential direction surrounding the rotor 220 . The electromagnetic force may rotate the rotor frame 230 in a circumferential direction around the rotation axis R. The serrations 233 fixed to the rotor frame 230 rotate the shaft 205, and the motor assembly 200 may rotate and drive an external device connected to the shaft 205, for example, the drum 20. there is.

In one embodiment, the outer ring 250 may be disposed on the outer surface 235b of the sidewall 235 opposite from the center of the rotor frame 230 along the circumferential direction. The outer ring 250 may have a shape extending in a circumferential direction from the outer surface 235b of the rotor frame 230 and have a substantially rectangular cross section in a vertical direction (eg, +/−W direction). can

In one embodiment, the outer ring 250 may be formed to surround the plurality of cores 221 and/or the plurality of permanent magnets 225 in an outward direction opposite to the rotation axis R direction. The outer ring 250 may be spaced apart from the plurality of cores 221 with the sidewall 235 interposed therebetween. Alternatively, the outer ring 250 may be spaced apart from the plurality of permanent magnets 225 with the side wall 235 interposed therebetween.

In one embodiment, the outer ring 250 fixes and supports the plurality of cores 221 and/or the plurality of permanent magnets 225 with the sidewall 235 therebetween to prevent the rotor frame 230 from scattering ( It may be a member for shatter-proof). The outer ring 250 may support the rotor frame 230 so that the rotor frame 230 is not damaged by strong centrifugal force while the rotor frame 230 rotates.

In one embodiment, outer ring 250 may be made of a non-magnetic material. The outer ring 250 substantially does not form a magnetic field due to electromagnetic interaction between the rotor 220 and the stator 210 and prevents leakage of magnetic flux, thereby preventing power loss.

In one embodiment, the outer ring 250 is spaced apart from the plurality of cores 221 with the sidewall 235 interposed therebetween, thereby reducing eddy current loss of the motor assembly 200 . In another embodiment, when the outer ring 250 and the plurality of cores 221 are closely connected, since the outer ring 250 is made of a non-magnetic material, the eddy current flowing along the surface of the plurality of cores 221 As a result, eddy current loss may occur. In one embodiment, when the outer ring 250 is spaced apart from the plurality of cores 221 at a predetermined interval, eddy current loss due to the outer ring 250 can be reduced, and the power of the motor assembly 200 efficiency can be improved.

The outer ring 250 of various embodiments of the present document is disposed at a predetermined interval from the plurality of cores 221 and/or the plurality of permanent magnets 225 with the sidewall 235 of the rotor frame 230 interposed therebetween. The outer ring 250 may prevent the rotor frame 230 from scattering, and also reduce vortex loss generated by the outer ring 250.

6 is a perspective view of a core 221 of a rotor (eg, rotor 220 of FIGS. 5A to 5C ) according to an embodiment of the present disclosure.

Referring to FIG. 6 , a core 221 according to various embodiments may include at least a portion of a pin hole 222 , a fixing groove 223 , and a continuous portion 224 .

6 shows one of a plurality of cores 221 included in the rotor 220 described in FIGS. 4 to 5C to describe the core 221 of the rotor 220 according to various embodiments, the rotor ( 220), contents overlapping with those described above will be omitted and described.

In one embodiment, the core 221 may have a hexahedral structure for supporting the permanent magnet 225 or a partially modified hexahedral structure. For example, the core 221 may have a three-dimensional columnar shape in which a polygonal cross-sectional structure extends in a rotational axis direction (eg, a +/−W direction or a vertical direction).

In one embodiment, the core 221 may include first to sixth surfaces 211a, 211b, 211c, 211d, 211e, and 211f. The first surface 221a may be a surface facing the rotor frame (eg, the rotor frame 230 of FIGS. 5A to 5C ). The second surface 221b may be a surface opposite to the first surface 221a, or facing the direction in which the bottom surface (eg, the bottom surface 231 of the rotor frame 230 of FIGS. 5A to 5C) faces. It can be one-sided.

In one embodiment, the third surface 221c may be a surface facing the center of a motor assembly (eg, the motor assembly 200 of FIGS. 5A to 5C) or a stator (eg, the stator of FIGS. 5A to 5C). (210)). The fourth surface 221d may be a surface opposite to the third surface 221c and may be a surface facing the outside of the motor assembly 200 . For example, a state in which the rotor 220 is viewed in the rotational axis direction from the outside of the rotor 220 may be described as 'a state in which the fourth surface 221d is viewed'.

In one embodiment, each of the fifth surface 211e and the sixth surface 211f may be a surface facing the circumferential direction of the motor assembly 200 and may be a surface facing the plurality of permanent magnets 225 .

In one embodiment, the pin hole 222 may be an opening that opens from the first surface 221a to the second surface 221b of the core 221 . In one embodiment, the pin hole 222 is a mold hole of the rotor frame 230 (eg, the bottom surface 231 of FIGS. It may be formed continuously in the mold hole 235d of FIG. 5B) in a vertical direction (eg, +/−W direction). In various embodiments, the pin hole 222 may be a hole through which a pin member (not shown) for fixing the plurality of cores 221 passes in a process of injecting the rotor frame 230 .

In one embodiment, the fixing groove 223 may be a groove of the core 221 opened to fill the rotor frame 230 to support the core 221 . For example, the fixing groove 223 is opened in the inner direction of the core 221 from the first surface 221a, or the hollow of the core 221 opened in the inner direction of the core 221 from the second surface 221b. can be space. In various embodiments, referring to the manufacturing method of the rotor 220, in the process of fixing the core 221 through a pin member (not shown) and then injecting the rotor frame 230, the rotor frame 230 Some parts may be filled and molded into the fixing groove 223 .

In one embodiment, the fixing groove 223 may support the core 221 and prevent it from scattering. For example, in a situation where the rotor 220 rotates, the plurality of cores 221 and the plurality of permanent magnets 225 may scatter due to centrifugal force, but the rotor frame 230 inserted into the fixing groove 223 ) can stably support the core 221 to prevent the core 221 from scattering.

In one embodiment, the fixing groove 223 is the first fixing groove 223a and the second surface 221b and the first fixing groove 223a and the second surface 221b open to the inside of the core 221 on the first surface 221a and the fourth surface 221d. A second fixing groove 223b opened to the inside of the core 221 may be included on the fourth surface 221d.

In one embodiment, the first fixing groove 223a may include a first groove part 223a-1 and a second groove part 223a-2. When looking at the first surface 221a, the first groove part 223a-1 has one end in contact with the fourth surface 221d and the other end extending into the core 221 (223a). ) may be part of The second groove part 223a-2 may be a part of the first fixing groove 223a connected to the other end of the first groove part 223a-1 when looking at the first surface 221a.

In one embodiment, the second fixing groove 223b may include a third groove part 223b-1 and a fourth groove part 223b-2. The third groove portion 223b-1 has one end in contact with the fourth surface 221d and the other end extending into the core 221 when viewed from the first surface 221a. ) may be part of The fourth groove part 223b-2 may be a part of the second fixing groove 223b connected to the other end of the third groove part 223b-1 when looking at the first surface 221a.

In one embodiment, the second groove portion 223a-2 is perpendicular to the direction in which the first groove portion 223a-1 extends (eg, +V direction) or the direction from the circumference of the rotor 220 toward the rotational axis. A cross-sectional area may be larger than that of the first groove portion 223a-1. In one embodiment, the fourth groove portion (223b-2) is perpendicular to the direction in which the third groove portion (223b-1) extends (eg, +V direction) or the direction from the circumference of the rotor 220 toward the axis of rotation. A cross-sectional area may be larger than that of the third groove portion 223b-1.

For example, as shown in FIG. 6, the second groove portion 223a-2 may have a substantially circular cross-section when viewed from the first surface 221a, and/or a fourth groove portion 223a-2. The groove portion 223b-2 may have a substantially circular cross section when viewed from the second surface 221b. It is not limited thereto, and the second groove portion 223a-2 and/or the fourth groove portion 223b-2 may have a polygonal cross-section such as a trapezoidal shape or a triangular shape, or may have an elliptical or curved shape. there is.

In one embodiment, as the rotor 220 rotates when the motor assembly 200 is driven, an external force may act on the core 221 in a circumferential direction by centrifugal force. In the fixing groove 223, as the cross-sectional area of the second groove portion 223a-2 and/or the fourth groove portion 223b-2 is larger than that of other portions, the amount of filling of the rotor frame 230 in the circumferential direction is also is increased, and the fixing force of the rotor frame 230 drawn into the fixing groove 223 can be improved.

In one embodiment, at least some areas of the first fixing groove 223a and the second fixing groove 223b may be disconnected or discontinuous. For example, the first fixing groove 223a and the second fixing groove 223b may be connected in at least some areas inside the core 221, but may be disconnected in at least some areas adjacent to the fourth surface 221d. can Alternatively, the first fixing groove 223a and the second fixing groove 223b may be partially disconnected from the fourth surface 221d, but partially connected to each other inside the core 221 .

Hereinafter, a partial region of the core 221 in which the first fixing groove 223a and the second fixing groove 223b are disconnected from each other is referred to as a continuous portion 224 and described. In actual implementation, the continuous portion 224 The boundary of may be unclear, and the continuous part 224 may refer to a part of the core 221 that plays the role of the continuous part 224 described in this document.

In one embodiment, the continuous portion 224 may be formed between the first fixing groove 223a and the second fixing groove 223b so that the first fixing groove 223a and the second fixing groove 223b are disconnected from each other. In addition, the core 221 may be continuous in an area where the fixing groove 223 is disconnected through the continuous portion 224 . In various embodiments, the continuous portion 224 may be a portion of the core 221 formed integrally with the core 221, or may be formed by inserting another member into the core 221.

In various embodiments, as shown in FIG. 6, the first fixing groove 223a and the second fixing groove 223b are in a state in which the core 221 is viewed from the first surface 221a or the second surface 221b. (That is, in the vertical direction or the +/-W direction), at least some areas may overlap each other, but is not limited thereto, and the first fixing groove 223a and the second fixing groove 223b are perpendicular to each other. In this case, a predetermined area between the first fixing groove 223a and the second fixing groove 223b may be the continuous portion 224 .

In one embodiment, the motor assembly 200 can smooth the flow of magnetic flux through the connection portion of the core 221 and improve power efficiency of the motor assembly 200 . In various embodiments, when current flows through the coils of the stator 210, the permanent magnets 225 of the rotor 220 electromagnetically interact with the stator 210, and are disposed on both sides of the core 221 in the circumferential direction. By the permanent magnet 225 to be, magnetic flux (magnetic flux) (F1, F2) can flow in the core 221.

In one embodiment, the magnetic fluxes F1 and F2 flow in a circumferential direction (eg, -U direction in FIG. 6) in the core 221, and the fixing groove 223 is formed in a direction perpendicular to the circumferential direction (eg, in the -U direction in FIG. 6). +/-W direction), the core 221 may be disconnected, and thus the flow of the magnetic fluxes F1 and F2 may be hindered. In various embodiments of the present document, the fixing groove 223 is mutually disconnected into the first fixing groove 223a and the second fixing groove 223b by a connecting portion, and the connecting portion can maintain the continuity of the core 221. there is.

For example, based on a state in which the fourth surface 221d of the core 221 is viewed, the magnetic fluxes F1 and F2 may flow in one direction (eg, -U direction). In one embodiment, the magnetic fluxes F1 and F2 are the first magnetic flux F1 and the core 221 flowing in a portion of the core 221 in which the first fixing groove 223a and the second fixing groove 223b are formed. A second magnetic flux (F2) flowing in a partial region where the middle connection portion is formed may be included. However, in actual implementation, as shown in FIG. 6, the magnetic fluxes F1 and F2 do not flow in a straight line, but may flow through other parts, and the magnetic fluxes F1 and F2 in FIG. 6 are for convenience of description. It shows an approximate flow for

In one embodiment, the core 221 of the first magnetic flux F1 is opened by the fixing groove 223 and the rotor frame 230 is filled, so that the flow of the first magnetic flux F1 may be interrupted. For example, the first magnetic flux (F1) is detoured to another area by the fixing groove (223), and the transfer efficiency may be lowered or a part of the first magnetic flux (F1) may be lost. In one embodiment, since the fixing groove 223 is disconnected and the core 221 is continuous, the second magnetic flux F2 can form a relatively smooth flow of magnetic flux compared to the first magnetic flux F1. .

In various embodiments, when the fixing groove 223 is not included, the core 221 may be separated or scattered due to centrifugal force. Alternatively, in various embodiments, when the continuous part 224 is not included, the flow of the magnetic fluxes F1 and F2 is hindered, and thus power efficiency of the motor assembly 200 may be lowered.

In various embodiments of the present document, the core 221 may include a continuous portion 224 that disconnects the fixing groove 223 to be divided into a first fixing groove 223a and a second fixing groove 223b, Stability and durability of the core 221 may be improved and power efficiency of the motor assembly 200 may be improved.

7A to 7D are perspective views of the core 221 of the rotor 220 according to an embodiment of the present document.

Hereinafter, various embodiments that can implement the first fixing groove 223a, the second fixing groove 223b, and the continuous portion 224 will be described with reference to FIGS. 7A to 7D, which are exemplary and are actually implemented. At the time, it is not limited thereto and may be variously implemented by changing the shape, structure, and/or size.

Referring to FIG. 7A , in one embodiment, a portion of the fourth surface 221d of the core 221 may continue substantially flatly in a circumferential direction via a continuous portion 224 . For example, in a state of looking at the fourth surface 221d, the continuous portion 224 may continue from a partial region of the fourth surface 221d to the third surface 221c. Alternatively, although not shown in the drawing, the continuous portion 224 extends from a partial area of the fourth surface 221d toward the inside of the core 221 by a predetermined width, and is provided by the continuous portion 224 to the first fixing groove. (223a) and the second fixing groove (223b), some parts may be connected to each other, other parts may be disconnected.

In one embodiment, when looking at the fourth surface 221d, the continuous portion 224 is substantially equal to the length of each of the first fixing groove 223a and the second fixing groove 223b, or the first fixing groove 223b. It may be formed with a longer length than each of the groove 223a and the second fixing groove 223b. For example, the vertical length of the first fixing groove 223a is the first length L1, the vertical length of the second fixing groove 223b is the second length L2, and the continuous portion ( 224) may be the third length L3.

As shown in FIG. 7A , the third length L3 may be substantially equal to the first length L1 and the second length L2 or larger than the first length L1 and the second length L2. can For example, the first length L1 and the second length L2 may be about 9 mm, and the third length L3 may be about 10 mm. In various embodiments, when the third length (L3) is formed relatively long, the core 221 has a relatively increased ratio of magnetic flux passing through the continuous portion 224, power efficiency of the motor assembly 200 can improve

Referring to FIG. 7B , the continuous portion 224 may be formed to have a length shorter than each of the first fixing groove 223a and the second fixing groove 223b when looking at the fourth surface 221d. For example, the first length L1 and the second length L2 may be about 13 mm, and the third length L3 may be about 2 mm. In various embodiments, when the third length L3 is relatively short, the ratio of the fixing grooves 223 increases to increase the amount of filling the rotor frame 230, and the filling of the fixing grooves 223 increases. The rotor frame 230 may stably fix the core 221 .

Referring to FIG. 7C , in a state in which the fourth surface 221d is viewed, a plurality of continuous portions 224 may be formed that are spaced apart from each other in a direction from the first surface 221a to the second surface 221b. In various embodiments, based on a state viewed from the fourth surface 221d, the plurality of continuous portions 224 include a first continuous portion 224a facing the first fixing groove 223a and the second fixing groove. It may include a second continuous portion 224b facing 223b. Alternatively, the plurality of continuous portions 224 may further include a third continuous portion 224c disposed between the first continuous portion 224a and the second continuous portion 224b.

In one embodiment, the fixing groove 223 is formed between the plurality of continuous portions 224a, 224b, and 224c and includes a third fixing groove 223c that opens into the core 221 on the fourth surface 221d. can include For example, an open area may be formed between the plurality of continuous portions 224 , and a third fixing groove 223c may be formed in the open area to fill the rotor frame 230 .

In one embodiment, when the plurality of continuous portions 224 includes first to third continuous portions 224a, 224b, and 224c, the third fixing groove 223c includes the first continuous portion 224a and the third continuous portion 224a. A fifth groove portion 223c-1 formed between the third continuous portion 224c and a sixth groove portion 223c-2 formed between the second continuous portion 224b and the third continuous portion 224c. ) may be included.

As shown in FIG. 7C, each of the first to third continuous portions 224a, 224b, and 224c is formed to have a relatively short length compared to the fixing groove 223, but the core 221 has a plurality of continuous portions ( 224), and third fixing grooves 223c may be formed between the plurality of continuous parts 224.

For example, the length of the third fixing groove 223c in the vertical direction may be the fourth length L4. Compared to the embodiment of FIG. 7A or 7B, even though the core 221 of FIG. 7C has short first and second lengths L1 and L2, the rotor frame 230 corresponding to the third length L3 ) is filled to stably support the core 221, and each of the plurality of continuous regions has a relatively short length, but is formed in plurality to reduce interference with magnetic flux flow and improve power efficiency of the motor assembly 200. can improve

Referring to FIG. 7D , a core 221 according to various embodiments may include a protruding portion 226 . The protruding portion 226 may be a partial area of the core 221 protruding from the fourth surface 221d in a circumferential direction when viewed from the fourth surface 221d. In various embodiments, the protruding portion 226 may be formed to cover a portion of an outer surface of an adjacent permanent magnet 225 . The protruding portion 226 may expand the surface area of the fourth surface 221d of the core 221 and help the core 221 efficiently transfer magnetic flux to the adjacent permanent magnet 225 .

In one embodiment, the core 221 may include a pair of side surfaces 211g and 211h of the fourth surface 221d perpendicular to the circumferential direction. For example, the first side surface 211g may be a surface extending from the fourth surface 221d to the fifth surface 211e, and the second side surface 211h may extend from the fourth surface 221d to the sixth surface 211f. It may be the side leading to . Each of the first side surface 211g and the second side surface 211h may be formed to face each of the permanent magnets 225 disposed on both sides of the core 221 .

In one embodiment, the protruding portion 226 may include a first protruding portion 226a formed on the first side surface 211g and a second protruding portion 226b formed on the second side surface 211h. For example, the first protruding portion 226a may protrude toward the permanent magnet 225 disposed in the direction of the first side surface 211g (eg, +U direction), and may protrude toward the direction of the second side surface 211h. (eg, may protrude toward the permanent magnet 225 disposed in the -U direction).

In one embodiment, the first protruding part 226a may protrude corresponding to the area where the first fixing groove 223a and the second fixing groove 223b are formed, and the second protruding part 226b is a continuous portion. 224 may protrude corresponding to the formed area. For example, the first protruding portion 226a may include a first sub-protruding portion 226a-1 in contact with the first surface 221a and a contact with the second surface 221b when viewing the fourth surface 221d. A second sub-protruding portion 226a-2 may be included.

In one embodiment, in a state of looking at the fourth surface 221d, the first protruding portion 226a may not overlap with the second protruding portion 226b in the circumferential direction. However, it is not limited to FIG. 7D , and the protruding portion 226 according to various embodiments may be arranged such that at least a portion of the first protruding portion 226a and the second protruding portion 226b overlap.

In one embodiment, since the first magnetic flux F1 flows in the area where the fixing groove 223 is formed and there is a possibility of relatively magnetic flux loss, the first protruding portion 226a is the fourth surface as an area receiving magnetic flux. 221d protrudes to expand, thereby expanding the surface area of the fourth surface 221d, and helping the first magnetic flux F1 to spread in a circumferential direction.

In one embodiment, the region in which the continuous portion 224 is formed may have a relatively smooth flow of magnetic flux through which the second magnetic flux F2 flows, and the second protruding region is a region that transmits magnetic flux, and is a fourth surface 221d. By protruding so as to expand, the surface area of the fourth surface 221d may be expanded, and the intensity of the second magnetic flux may be improved, thereby improving magnetic flux transmission efficiency.

8A to 8D are perspective views of the core 221 and the permanent magnet 225 of the rotor 220 according to an embodiment of the present document.

Referring to FIGS. 8A to 8D , the core 221 and the permanent magnet 225 of the rotor 220 according to various embodiments may be arranged in various ways.

8A to 8D show a plurality of cores 221 and a plurality of cores 221 arranged inside the rotor frame 230 described above to describe the core 221 and the permanent magnet 225 of the rotor 220 according to various embodiments. A portion of the permanent magnet 225 is shown, and descriptions overlapping with the above description are omitted.

In one embodiment, at least some of the permanent magnets 225 of the plurality of permanent magnets 225 are more vertical than at least some of the cores 221 of the plurality of cores 221 (eg, +/- W direction). can be long For example, when the length of the core 221 in the vertical direction is the reference length L0, the permanent magnet 225 may be formed longer than the reference length.

Referring to FIG. 8A , in one embodiment, at least some of the permanent magnets 225 among the plurality of permanent magnets 225 have a bottom surface ( 231) direction (eg, -W direction) may be arranged so that a predetermined interval L5 protrudes. The permanent magnets 225 of various embodiments may be disposed so that one surface and the second surface 221b of the adjacent core 221 are substantially flat.

Referring to FIG. 8B , in one embodiment, at least some of the permanent magnets 225 among the plurality of permanent magnets 225 have side walls (eg, : It may be arranged so that a predetermined interval L6 protrudes in a direction in which the sidewall 235 of the rotor frame 230 of FIGS. 5A to 5C extends (eg, +W direction). The permanent magnets 225 of various embodiments may be disposed so that one surface and the first surface 221a of the adjacent core 221 are substantially flat.

In the rotor 220 according to the embodiment of FIG. 8a or 8b, one surface of the permanent magnet 225 coincides with the core 221 and the other surface has a predetermined distance (L5, L6) from the core 221. It can be arranged to protrude. In the rotor 220 of various embodiments of the present document, one side matches the core 221 and the other side protrudes from the core 221 so as to support the permanent magnet 225 in the injection process of the rotor frame 230. , The permanent magnets 225 may be disposed so that predetermined intervals L5 and L6 protrude. In the motor assembly 200, magnetic flux generated as the size of the permanent magnet 225 increases, and as the length L0 of the core 221 is maintained, the size of the entire motor assembly 200 is the same or It can be formed in a limited length. In various embodiments, the driving force of the motor assembly 200 may be effectively improved by maintaining the size of the outer diameter of the motor assembly 200 or by expanding a relatively small size.

For example, since the protruding part of the permanent magnet 225 does not contact the core 221, when the magnetic flux of the corresponding part is focused, the counter electromotive force of the motor can be increased and the performance of the motor can be improved. In various embodiments of the present document, one surface of the permanent magnet 225 coincides with the adjacent core 221 based on the vertical direction, and the other surface protrudes from the adjacent core 221 at a predetermined interval, resulting in counter electromotive force in the corresponding area. , and by efficiently concentrating magnetic flux through the structural design of the core 221 described above with reference to FIGS. 6 to 7D , the driving force and/or power efficiency of the motor assembly 200 may be improved.

Referring to FIG. 8C , in one embodiment, at least some of the permanent magnets 225 among the plurality of permanent magnets 225 have a bottom surface (with respect to the first surface 221a of one adjacent core 221) ( 231) direction (eg, -W direction) may be arranged so that a predetermined distance L5 protrudes. In various embodiments, at least some of the permanent magnets 225 among the plurality of permanent magnets 225 extend in the direction in which the sidewall 235 extends relative to the second surface 221b of any one adjacent core 221 ( Example: +W direction) may be arranged so that a predetermined distance (L6) protrudes.

In the rotor 220 according to the embodiment of FIG. 8C , both sides of a pair of permanent magnets 225 in a vertical direction may protrude from the core 221 at predetermined intervals L5 and L6. 8c shows that the length of the permanent magnet 225 can be formed higher than in other embodiments, and the magnetic flux generated in the motor assembly 200 increases as the size of the permanent magnet 225 increases, and the motor assembly 200 driving force can be improved.

The motor assembly 200 according to the embodiment of FIG. 8C can increase the magnetic flux more effectively than other embodiments because the magnetic flux generated can increase as the size of the permanent magnet 225 increases. Alternatively, in the motor assembly 200 of the embodiment of FIG. 8C, the distance at which the permanent magnets 225 protrude in one direction in the vertical direction is reduced, and the permanent magnets 225 protrude relatively less in both directions, so that the motor assembly 200 ) can be maintained or the degree of expansion of the size can be reduced.

Referring to FIGS. 8A to 8C , the permanent magnet 225 according to various embodiments has a longer length so that at least a portion of the core 221 protrudes, so that the strength of the generated magnetic flux may increase. In various embodiments, the core 221 includes the fixing groove 223 and the continuous portion 224, so that the magnetic flux of increased intensity is transmitted and loss generated can be reduced, and the power efficiency of the motor assembly 200 can be reduced. can improve

Referring to FIG. 8D , at least some of the permanent magnets 225 among the plurality of permanent magnets 225 have sidewalls 235 extending relative to the first surface 221a of any one adjacent core 221 . It may be arranged so that a predetermined gap (L7) is pulled in the direction. In various embodiments, the permanent magnets 225 may be disposed to be drawn in at a predetermined interval L8 toward the bottom surface 231 based on the second surface 221b of the core 221 .

In the rotor 220 according to the embodiment of FIG. 8D, the length of the permanent magnet 225 is relatively shorter than that of the core 221, thereby reducing the weight of the entire motor assembly 200, and the permanent magnet in manufacturing. By reducing the cost of (225), it is possible to economically improve manufacturing efficiency. In various embodiments, a permanent magnet 225 is disposed adjacent to the center of the core 221, and the permanent magnet 225 is relatively larger than the portion corresponding to the fixing groove 223 of the core 221. It may be disposed adjacent to a portion corresponding to the continuous portion 224 of . Since the continuous portion 224 of the core 221 can efficiently transfer magnetic flux, the rotor 220 of FIG. 8D can improve magnetic flux transfer efficiency in an embodiment using a small-sized permanent magnet 225 .

In the motor assembly 200 including a stator 210 according to various embodiments and a rotor 220 rotating about a rotation axis by electromagnetically interacting with the stator 210, the rotor 220, A rotor frame 230 including a bottom surface 231 centered on the rotation axis and a side wall 235 extending from the circumference of the bottom surface 231 to surround the stator 210 in a circumferential direction, the circumferential direction A plurality of cores 221 disposed on the sidewall 235 along and a plurality of permanent magnets 225 disposed on the sidewall 235 along the circumferential direction and disposed between the plurality of cores 221, respectively. ), and at least some of the cores 221 among the plurality of cores 221 have a first surface 221a facing the bottom surface 231 of the rotor frame 230, and the first surface 221a A second surface 221b opposite to the stator 210, a third surface 221c facing the stator 210, and a fourth surface 221d opposite to the third surface 221c, the core 221 , the first fixing groove 223a, the second surface 221b, and the fourth surface 221d open to the inside of the core 221 from the first surface 221a and the fourth surface 221d. includes a second fixing groove 223b open to the inside of the core 221, and the fixing groove 223 filled in the rotor frame 230 to support the core 221 and the first It is formed between the first fixing groove 223a and the second fixing groove 223b so that the fixing groove 223a and the second fixing groove 223b are disconnected from each other, and the core 221 is continuous. A continuous portion 224 may be included.

In various embodiments, at least a partial area of the fourth surface 221d may continue substantially flatly in the circumferential direction via the continuous portion 224 .

In various embodiments, in a state in which the fourth surface 221d is viewed, the continuous portion 224 is substantially the same length as each of the first fixing groove 223a and the second fixing groove 223b, or It may be formed with a length longer than each of the first fixing groove 223a and the second fixing groove 223b.

In various embodiments, in a state of looking at the fourth surface 221d, the continuous portion 224 is formed to have a shorter length than each of the first fixing groove 223a and the second fixing groove 223b. It can be.

In various embodiments, the continuous portion 224 is spaced apart from each other in the direction from the first surface 221a to the second surface 221b in a state of looking at the fourth surface 221d, and is formed in plurality, The fixing groove 223 is formed between a plurality of continuous portions 224 in a state of looking at the fourth surface 221d, and is open to the inside of the core 221 from the fourth surface 221d. A third fixing groove 223c may be included.

In various embodiments, the plurality of continuous portions 224 may include a first continuous portion 224a facing the first fixing groove 223a and the second fixing portion 224a while viewing the fourth surface 221d. It may include a second continuous portion 224b facing the groove 223b and a third continuous portion 224c disposed between the first continuous portion 224a and the second continuous portion 224b.

In various embodiments, the third fixing groove 223c includes a fifth groove portion 223c-1 formed between the first continuous portion 224a and the third continuous portion 224c and the second continuous portion 223c-1. A sixth groove portion 223c-2 formed between the portion 224b and the third continuous portion 224c may be included.

In various embodiments, the core 221 may include, in a state in which the fourth surface 221d is viewed, a protruding portion 226 protruding from the fourth surface 221d in the circumferential direction. can

In various embodiments, the protruding portion 226 is a first formed on one side surface 211g based on the pair of side surfaces 211g and 211h of the fourth surface 221d perpendicular to the circumferential direction. It may include, including a protruding portion 226a and a second protruding portion 226b formed on the side surface 211h different from the first protruding portion 226a.

In various embodiments, the first protruding portion 226a may non-contact the second protruding portion 226b in the circumferential direction in a state in which the fourth surface 221d is viewed.

In various embodiments, the first protruding part 226a may include a first sub-protruding part 226a-1 contacting the first surface 221a and the second protruding part 226a-1 in a state of looking at the fourth surface 221d. A second sub-protruding portion 226a-2 contacting the surface 221b may be included.

In various embodiments, at least some of the permanent magnets 225 among the plurality of permanent magnets 225 are directed toward the bottom surface 231 based on the first surface 221a of any one adjacent core 221. It can be arranged so as to protrude into.

In various embodiments, at least some of the permanent magnets 225 among the plurality of permanent magnets 225 are adjacent to one of the first surface 221a and the second surface 221b of any one core 221 and One side may be arranged to be substantially flat.

In various embodiments, at least some of the permanent magnets 225 among the plurality of permanent magnets 225 have sidewalls 235 extending relative to the second surface 221b of any one adjacent core 221. It may be arranged so as to protrude in a direction.

In various embodiments, at least some of the permanent magnets 225 among the plurality of permanent magnets 225 have sidewalls 235 extending relative to the first surface 221a of any one adjacent core 221. It can be arranged so that it is drawn in the direction.

In various embodiments, at least some of the permanent magnets 225 among the plurality of permanent magnets 225 are directed toward the bottom surface 231 based on the second surface 221b of any one adjacent core 221. It can be arranged to be drawn into.

In various embodiments, the first fixing groove 223a has one end in contact with the fourth surface 221d and the other end into the core 221 in a state in which the first surface 221a is viewed. It is connected to the other end of the first groove part 223a-1 in a state of looking at the extending first groove part 223a-1 and the first surface 221a, and the first groove part 223a-1 ) may include a second groove portion 223a-2 having a cross-sectional area perpendicular to the extending direction larger than that of the first groove portion 223a-1.

In various embodiments, the second fixing groove 223b has one end in contact with the fourth surface 221d and the other end into the core 221 in a state in which the second surface 221b is viewed. It is connected to the other end of the third groove part 223b-1 and the third groove part 223b-1 when looking at the extending third groove part 223b-1 and the second surface 221b. ) may include a fourth groove portion 223b-2 having a cross-sectional area perpendicular to the extending direction larger than that of the third groove portion 223b-1.

In various embodiments, the second groove portion 223a-2 may have a substantially circular cross-section when viewed from the first surface 221a.

The laundry treatment apparatus 100 according to various embodiments includes a body 10 having a tub 15 therein, a drum 20 and a stator 210 rotatably disposed inside the tub 15, the A rotor 220 that electromagnetically interacts with the stator 210 to rotate about a rotational axis, and a shaft 205 connected to the drum 20 to rotate the drum 20 about the rotational axis. It includes a motor assembly 200, wherein the rotor 220 extends to surround the stator 210 in a circumferential direction from a bottom surface 231 centered on the rotation axis and a circumference of the bottom surface 231. A rotor frame 230 including a sidewall 235, a plurality of cores 221 disposed on the sidewall 235 along the circumferential direction and disposed on the sidewall 235 along the circumferential direction, wherein the plurality of cores 221 are disposed on the sidewall 235 includes a plurality of permanent magnets 225 each disposed between the cores 221 of the plurality of cores 221, and at least some of the cores 221 of the plurality of cores 221, the bottom surface 231 of the rotor frame 230 A first surface 221a facing ), a second surface 221b opposite to the first surface 221a, a third surface 221c facing the stator 210 and opposite to the third surface 221c and a fourth surface 221d, and the core 221 has a first fixing groove 223a open to the inside of the core 221 on the first surface 221a and the fourth surface 221d. ) and second fixing grooves 223b open to the inside of the core 221 on the second surface 221b and the fourth surface 221d, and the rotor frame 230 is filled therein The first fixing groove 223a and the second fixing groove (223a and 223b) are mutually disconnected from each other. 223b), and may include a continuous portion 224, which is a portion where the core 221 continues.

Although preferred embodiments have been shown and described above, the present disclosure is not limited to the specific embodiments described above, and is available to those skilled in the art to which the present disclosure belongs without departing from the subject matter claimed on the claims. Of course, various modified implementations are possible, and these modified implementations should not be individually understood from the technical idea or perspective.

Claims (20)

A motor assembly comprising a stator and a rotor that electromagnetically interacts with the stator to rotate about a rotation axis,
the rotor,
a rotor frame including a bottom surface centered on the rotating shaft and sidewalls extending from the circumference of the bottom surface to surround the stator in a circumferential direction;
a plurality of cores disposed on the sidewall along the circumferential direction; and
A plurality of permanent magnets disposed on the sidewall in the circumferential direction and respectively disposed between the plurality of cores;
At least some of the plurality of cores,
A first surface facing the bottom surface of the rotor frame, a second surface opposite to the first surface, a third surface facing the stator, and a fourth surface opposite to the third surface,
the core,
a first fixing groove opening into the core from the first surface and the fourth surface and a second fixing groove opening into the core from the second surface and the fourth surface; A fixing groove filled in the inside to support the core, and
A motor assembly comprising a continuous portion formed between the first fixing groove and the second fixing groove so that the first fixing groove and the second fixing groove are disconnected from each other, and which is a continuous portion of the core. According to claim 1,
The fourth side,
The motor assembly of claim 1 , wherein at least a partial area continues substantially flatly via the continuous portion in the circumferential direction. According to claim 1,
In the state of looking at the fourth side,
The continuous part is
A motor assembly formed with a length substantially equal to the length of each of the first fixing groove and the second fixing groove or longer than the length of each of the first fixing groove and the second fixing groove. According to claim 1,
In the state of looking at the fourth side,
The continuous part is
Formed to a length shorter than the length of each of the first fixing groove and the second fixing groove, the motor assembly. According to claim 1,
The continuous portion is formed in plurality by being spaced apart from each other in the direction of the second surface from the first surface in a state in which the fourth surface is viewed,
The motor assembly, wherein the fixing groove includes a third fixing groove formed between a plurality of continuous portions in a state in which the fourth surface is viewed and opened into the core from the fourth surface. According to claim 5,
The plurality of consecutive parts,
In the state of looking at the fourth side,
A first continuous portion facing the first fixing groove;
a second continuous portion facing the second fixing groove; and
and a third continuous portion disposed between the first continuous portion and the second continuous portion. According to claim 6,
The third fixing groove,
A fifth groove portion formed between the first continuous portion and the third continuous portion; and
and a sixth groove portion formed between the second continuous portion and the third continuous portion. According to claim 1,
the core,
In the state of looking at the fourth side,
A motor assembly comprising a protruding portion protruding from the fourth surface in the circumferential direction. According to claim 8,
The protruding part,
Based on the pair of side surfaces of the fourth surface perpendicular to the circumferential direction, the motor assembly includes a first protruding portion formed on one side surface and a second protruding portion formed on a side surface different from the first protruding portion. . According to claim 9,
The first protruding portion,
In a state of looking at the fourth surface, a motor assembly that does not overlap with the second protruding portion in the circumferential direction. According to claim 9,
The first protruding portion,
A motor assembly comprising a first sub-protruding portion in contact with the first surface and a second sub-protruding portion in contact with the second surface in a state in which the fourth surface is viewed. According to claim 1,
At least some of the permanent magnets among the plurality of permanent magnets,
Based on the first surface of any one adjacent core, the motor assembly is disposed to protrude toward the bottom surface. According to claim 1,
At least some of the permanent magnets among the plurality of permanent magnets,
A motor assembly disposed so that one of the first and second surfaces of any one adjacent core and one surface are substantially flat. According to claim 1,
At least some of the permanent magnets among the plurality of permanent magnets,
A motor assembly disposed so as to protrude in a direction in which the sidewall extends based on the second surface of any one adjacent core. According to claim 1,
At least some of the permanent magnets among the plurality of permanent magnets,
A motor assembly disposed so as to be retracted in a direction in which the sidewall extends based on the first surface of any one adjacent core. According to claim 15,
At least some of the permanent magnets among the plurality of permanent magnets,
A motor assembly disposed so as to be drawn in the direction of the bottom surface based on the second surface of any one of the adjacent cores. According to claim 1,
The first fixing groove,
A first groove portion having one end in contact with the fourth surface and the other end extending into the core in a state of looking at the first surface, and
A second groove portion connected to the other end of the first groove portion and having a cross-sectional area perpendicular to the direction in which the first groove portion extends is greater than that of the first groove portion in a state in which the first surface is viewed. To do, the motor assembly. According to claim 17,
The second fixing groove,
A third groove portion having one end in contact with the fourth surface and the other end extending into the core in a state of looking at the second surface, and
A fourth groove part connected to the other end of the third groove part in a state of looking at the second surface and having a cross-sectional area perpendicular to the direction in which the third groove part extends is greater than that of the third groove part. To do, the motor assembly. According to claim 17,
The second groove part,
The motor assembly, wherein the shape of the cross section of the state viewed from the first surface is formed in a substantially circular shape. In the clothes handling device,
A main body having a tub provided therein;
a drum rotatably disposed inside the tub; and
A motor assembly including a stator, a rotor electromagnetically interacting with the stator to rotate around a rotational axis, and a shaft connected to the drum to rotate the drum around the rotational axis, ,
the rotor,
a rotor frame including a bottom surface centered on the rotating shaft and sidewalls extending from the circumference of the bottom surface to surround the stator in a circumferential direction;
a plurality of cores disposed on the sidewall along the circumferential direction; and
A plurality of permanent magnets disposed on the sidewall in the circumferential direction and respectively disposed between the plurality of cores;
At least some cores among the plurality of cores,
A first surface facing the bottom surface of the rotor frame, a second surface opposite to the first surface, a third surface facing the stator, and a fourth surface opposite to the third surface,
the core,
a first fixing groove opening into the core from the first surface and the fourth surface and a second fixing groove opening into the core from the second surface and the fourth surface; A fixing groove filled in the inside to support the core, and
The first fixing groove and the second fixing groove are formed between the first fixing groove and the second fixing groove to be disconnected from each other, and including a continuous portion that is a continuous portion of the core, the laundry treatment apparatus.

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