Washing machine and method of controlling washing machine

Abstract

This washing machine comprises: a tub capable of accommodating water; a level sensor for measuring the level of the water accommodated in the tub; a rotatable drum, which is provided in the tub and can accommodate laundry; a motor for rotating the drum on the basis of a driving current applied to the motor; a current sensor for detecting the driving current applied to the motor; and at least one processor, wherein the at least one processor can be configured to rotate the drum before water supply to the tub while the laundry is accommodated in the drum so as to detect a dry-laundry current value of the motor, supply water to the tub, rotate the drum so as to detect a water level variation after first water supply, rotate the drum after first wet-laundry agitation so as to detect a wet-laundry current value of the motor, and identify the material of the laundry on the basis of the dry-laundry current value, the water level variation and the wet-laundry current value.

Description

Washing machine and washing machine control method

[0001] The disclosed invention relates to a washing machine and a method for controlling the washing machine, and more particularly, to a washing machine capable of detecting the quality of laundry and a method for controlling the washing machine.

[0002] Typically, a washing machine includes a tub and a drum rotatably installed within the tub, and can wash laundry by rotating the drum containing laundry within the tub. The washing machine can perform a washing cycle for washing laundry, a rinsing cycle for rinsing washed laundry, and a spin-drying cycle for dehydrating laundry.

[0003] In order to wash laundry efficiently without damage, it is necessary to accurately identify the material of the laundry and perform appropriate washing operations according to each material.

[0004] One aspect of the disclosed invention provides a washing machine and a method of controlling the washing machine that can accurately identify the quality of laundry while minimizing water usage.

[0005] According to one aspect of the disclosed invention, a washing machine comprises: a tub capable of receiving water; a water level sensor for measuring the water level contained in the tub; a rotatable drum provided within the tub and capable of receiving laundry; a motor for rotating the drum based on a driving current applied to the motor; a current sensor for detecting the driving current applied to the motor; And, in a state where laundry is accommodated in the drum, at least one processor configured to rotate the drum by the motor to perform dry laundry agitation before supplying water to the tub, detect a dry laundry current value corresponding to a driving current detected by the current sensor during the dry laundry agitation, supply water to the tub to perform a first supply of water after the dry laundry agitation, rotate the drum by the motor to perform a first wet laundry agitation after the first supply of water, detect a water level change amount measured by the water level sensor during the first wet laundry agitation, rotate the drum by the motor to perform a second wet laundry agitation after the first wet laundry agitation, detect a wet laundry current value corresponding to a driving current detected by the current sensor during the second wet laundry agitation, and identify a quality of the laundry based on the dry laundry current value, the water level change amount, and the wet laundry current value.

[0006] According to one aspect of the disclosed invention, a control method for a washing machine includes a tub capable of receiving water, a water level sensor for measuring a water level of water received in the tub, a rotatable drum provided in the tub and capable of receiving laundry, a motor for rotating the drum based on a driving current applied to the motor, a current sensor for detecting the driving current applied to the motor, and at least one processor, wherein, with laundry received in the drum, the drum is rotated by the motor before water supply to the tub, and a dry laundry current value corresponding to the driving current detected by the current sensor is detected during the dry laundry agitation; water is supplied to the tub so as to perform a first water supply after the dry laundry agitation; the drum is rotated by the motor so as to perform a first wet laundry agitation after the first water supply, and a water level change amount measured by the water level sensor is detected during the first wet laundry agitation; It may include: rotating the drum by the motor to perform a second wet cloth stirring after the first wet cloth stirring, detecting a wet cloth current value corresponding to the driving current detected by the current sensor during the second wet cloth stirring; and identifying the quality of the laundry based on the dry cloth current value, the amount of change in water level, and the wet cloth current value.

[0007] FIG. 1 is a perspective view illustrating a washing machine according to one embodiment of the present disclosure.

[0008] FIG. 2 is a cross-sectional view of a washing machine according to one embodiment of the present disclosure.

[0009] FIG. 3 illustrates a control block of a washing machine according to one embodiment of the present disclosure.

[0010] FIG. 4 illustrates an example of a flowchart of a method for controlling a washing machine according to one embodiment of the present disclosure.

[0011] FIG. 5 illustrates an example of a timing diagram for detecting foam in a washing machine according to one embodiment of the present disclosure.

[0012] FIG. 6 illustrates laundry quality classification by input element using a learned model of a washing machine according to one embodiment of the present disclosure.

[0013] FIG. 7 illustrates the classification of laundry quality when dry current, wet current, and water level difference are input into a learned model of a washing machine according to one embodiment of the present disclosure.

[0014] FIG. 8 illustrates an example of wet cloth agitation of a washing machine according to one embodiment of the present disclosure.

[0015] FIG. 9 illustrates the change in moisture content between a towel and delicate clothes in the first wet agitation of a washing machine according to one embodiment of the present disclosure.

[0016] FIG. 10 illustrates changes in the tub water level according to the quality of laundry in a washing machine according to one embodiment of the present disclosure.

[0017] FIG. 11 illustrates the difference in additional water supply time according to laundry quality in a washing machine according to one embodiment of the present disclosure.

[0018] FIG. 12 is a flowchart illustrating an operation of adding a minimum amount of detergent during foam detection in a washing machine according to one embodiment of the present disclosure and then adding the remaining amount of detergent after foam detection in laundry.

[0019] FIG. 13 is a flowchart illustrating an operation of outputting information on the start of a washing cycle during foam detection in a washing machine according to one embodiment of the present disclosure.

[0020] It should be understood that the various embodiments and terms used in this document are not intended to limit the technical features described in this document to specific embodiments, but rather to include various modifications, equivalents, or substitutes of the embodiments.

[0021] In connection with the description of the drawings, similar reference numerals may be used for similar or related components.

[0022] The singular form of a noun corresponding to an item may include one or more of said items, unless the relevant context clearly indicates otherwise.

[0023] In this document, each of the phrases "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 "at least one of A, B, or C" may include any one of the items listed together in that phrase, or all possible combinations thereof.

[0024] The term "and / or" includes any combination of a plurality of related described elements or any one of a plurality of related described elements.

[0025] Terms such as "first," "second," or "first" or "second" may be used simply to distinguish one component from another and do not qualify the components in any other respect (e.g., importance or order).

[0026] When a component (e.g., a first component) is referred to as being "coupled" or "connected" to another component (e.g., a second component), with or without the terms "functionally" or "communicatively," it means that the component can be connected to the other component directly (e.g., wired), wirelessly, or through a third component.

[0027] The terms "include" or "have" are intended to specify the presence of a feature, number, step, operation, component, part or combination thereof described in this document, but do not preclude the presence or addition of one or more other features, numbers, steps, operations, components, parts or combinations thereof.

[0028] When a component is said to be “connected,” “coupled,” “supported,” or “in contact with” another component, this includes not only cases where the components are directly connected, coupled, supported, or in contact, but also cases where the components are indirectly connected, coupled, supported, or in contact through a third component.

[0029] When we say that a component is "on" another component, this includes not only cases where the component is in contact with the other component, but also cases where there is another component between the two components.

[0030] Washing machines according to various embodiments can perform washing, rinsing, spin-drying, and drying processes. A washing machine is an example of a clothing treatment device, and the term "clothing treatment device" encompasses devices that wash clothing (laundry items, drying items), devices that dry clothing, and devices that can perform both washing and drying of clothing.

[0031] Washing machines according to various embodiments may include top-loading washing machines in which the laundry inlet for loading or removing laundry is provided facing upward, or front-loading washing machines in which the laundry inlet is provided facing forward. Washing machines according to various embodiments may include washing machines of other loading methods other than top-loading washing machines and front-loading washing machines.

[0032] In the case of a top-loading washing machine, laundry can be washed using a water current generated by a rotating body such as a pulsator. In the case of a front-loading washing machine, laundry can be washed by rotating the drum to repeatedly raise and lower the laundry. The front-loading washing machine may include a washing machine with a dryer that can dry the laundry contained inside the drum. The washing machine with a dryer may include a hot air supply device for supplying high-temperature air into the drum and a condensing device for removing moisture from the air discharged from the drum. For example, the washing machine with a dryer may include a heat pump device. The washing machine according to various embodiments may include a washing machine with a washing method other than the washing method described above.

[0033] A washing machine according to various embodiments may include a body that houses various components inside. The body may be provided in the form of a box with a laundry inlet formed on one side.

[0034] A washing machine may include a door for opening and closing the laundry compartment. The door may be rotatably mounted to the main body by a hinge. At least a portion of the door may be transparent or translucent to allow the interior of the main body to be visible.

[0035] A washing machine may include a tub provided within the body to store water. The tub may be provided in a generally cylindrical shape with a tub opening formed on one side, and may be positioned within the body so that the tub opening corresponds to a laundry inlet.

[0036] The tub may be connected to the main body by a damper. The damper can absorb vibrations generated when the drum rotates, thereby reducing the vibrations transmitted to the main body.

[0037] A washing machine may include a drum configured to accommodate laundry.

[0038] The drum may be positioned within the tub such that the drum opening provided on one side corresponds to the laundry inlet and the tub opening. Laundry may be sequentially passed through the laundry inlet, the tub opening, and the drum opening to be accommodated within the drum or taken out from the drum.

[0039] The drum rotates within the tub and can perform each of the washing, rinsing, and / or dehydration operations. The cylindrical wall of the drum is formed with a number of perforations, allowing water stored in the tub to flow into or out of the drum.

[0040] A washing machine may include a drive device configured to rotate a drum. The drive device may include a drive motor and a rotating shaft for transmitting driving force generated by the drive motor to the drum. The rotating shaft may be connected to the drum by penetrating the tub.

[0041] The driving device can rotate the drum forward or backward to perform each operation according to the washing, rinsing, and / or dehydration, or drying cycle.

[0042] A washing machine may include a water supply device configured to supply water to a tub. The water supply device may include a water supply pipe and a water supply valve provided on the water supply pipe. The water supply pipe may be connected to an external water source. The water supply pipe may extend from the external water source to a detergent supply device and / or the tub. Water may be supplied to the tub via the detergent supply device. Water may be supplied to the tub without passing through the detergent supply device.

[0043] The water supply valve can open or close the water supply pipe in response to an electrical signal from the control unit. The water supply valve can allow or block the supply of water to the tub from an external water source. The water supply valve may include, for example, a solenoid valve that opens and closes in response to an electrical signal.

[0044] A washing machine may include a detergent supply device configured to supply detergent to a tub. The detergent supply device may include a manual detergent supply device that requires a user to add detergent for each wash cycle, and an automatic detergent supply device that stores a large amount of detergent and automatically supplies a predetermined amount of detergent during a wash cycle. The detergent supply device may include a detergent compartment for storing detergent. The detergent supply device may be configured to supply detergent into the tub during a water supply process. Water supplied through a water supply pipe may be mixed with detergent via the detergent supply device. The water mixed with detergent may be supplied into the tub. Detergent is used as a comprehensive term for pre-wash detergent, main wash detergent, fabric softener, bleach, etc., and the detergent compartment may be divided into a pre-wash detergent storage area, a main wash detergent storage area, a fabric softener storage area, and a bleach storage area.

[0045] A washing machine may include a drainage device configured to discharge water contained in a tub to the outside. The drainage device may include a drain pipe extending from the bottom of the tub to the outside of the main body, a drain valve provided on the drain pipe to open and close the drain pipe, and a pump provided on the drain pipe. The pump may pump water in the drain pipe to the outside of the main body.

[0046] The washing machine may include a control panel positioned on one side of the main body. The control panel may provide a user interface for a user to interact with the washing machine. The user interface may include at least one input interface and at least one output interface.

[0047] At least one input interface can convert sensory information received from a user into an electrical signal.

[0048] At least one input interface may include a power button, an operation button, a course selection dial (or a course selection button), and a wash / rinse / spin setting button. The at least one input interface may include, for example, a tact switch, a push switch, a slide switch, a toggle switch, a micro switch, a touch switch, a touch pad, a touch screen, a jog dial, and / or a microphone.

[0049] At least one output interface can visually or audibly convey information related to the operation of the washing machine to the user.

[0050] For example, at least one output interface may transmit information related to the washing cycle and operating time of the washing machine, as well as washing / rinsing / spin settings to the user. Information related to the operation of the washing machine may be output via a screen, indicator, voice, etc. At least one output interface may include, for example, a liquid crystal display (LCD) panel, a light emitting diode (LED) panel, a speaker, etc.

[0051] The washing machine may include a communication module for communicating with external devices via wires and / or wirelessly.

[0052] The communication module may include at least one of a short-range communication module or a long-range communication module.

[0053] The communication module can transmit data to or receive data from external devices (e.g., a server, a user device, and / or a home appliance). For example, the communication module can establish communication with a server, a user device, and / or a home appliance, and transmit and receive various data.

[0054] To this end, the communication module may support the establishment of a direct (e.g., wired) communication channel or a wireless communication channel between external devices, and the performance of communication through the established communication channel. According to one embodiment, the communication module may include a wireless communication module (e.g., a cellular communication module, a short-range wireless communication module, or a global navigation satellite system (GNSS) communication module) or a wired communication module (e.g., a local area network (LAN) communication module, or a power line communication module). Any of these communication modules may communicate with the external device via a first network (e.g., a short-range communication network such as Bluetooth, wireless fidelity (WiFi) direct, or infrared data association (IrDA)) or a second network (e.g., a long-range communication network such as a legacy cellular network, a 5G network, a next-generation communication network, the Internet, or a computer network (e.g., a LAN or WAN)). These various types of communication modules may be integrated into a single component (e.g., a single chip) or implemented as multiple separate components (e.g., multiple chips).

[0055] The short-range wireless communication module may include, but is not limited to, a Bluetooth communication module, a BLE (Bluetooth Low Energy) communication module, a near field communication module, a WLAN (Wi-Fi) communication module, a Zigbee communication module, an infrared (IrDA, infrared Data Association) communication module, a WFD (Wi-Fi Direct) communication module, an UWB (ultrawideband) communication module, an Ant+ communication module, a microwave (uWave) communication module, etc.

[0056] The long-distance communication module may include a communication module that performs various types of long-distance communication and may include a mobile communication unit. The mobile communication unit transmits and receives wireless signals with at least one of a base station, an external terminal, and a server on a mobile communication network.

[0057] In one embodiment, the communication module can communicate with external devices such as a server, a user device, and other home appliances through a peripheral access point (AP). The access point (AP) can connect a local area network (LAN) to which the washing machine or the user device is connected to a wide area network (WAN) to which the server is connected. The washing machine or the user device can be connected to the server through the wide area network (WAN). The control unit can control various components of the washing machine, such as a drive motor and a water inlet valve. The control unit can control various components of the washing machine to perform at least one cycle, including water supply, washing, rinsing, and / or spin-drying, according to a user input. For example, the control unit can control the drive motor to adjust the rotation speed of the drum, or control the water inlet valve of the water supply device to supply water to the tub.

[0058] The control unit may include hardware such as a CPU or memory, and software such as a control program. For example, the control unit may include an algorithm for controlling the operation of components within the washing machine, at least one memory for storing program-type data, and at least one processor for performing the aforementioned operations using data stored in the at least one memory. The memory and the processor may each be implemented as separate chips. The processor may include one or more processor chips or one or more processing cores. The memory may include one or more memory chips or one or more memory blocks. Additionally, the memory and the processor may be implemented as a single chip.

[0059] The terms "upper", "lower", "front", "rear", "left", "right", etc. used in the following description are defined based on the drawings, and the shape and position of each component are not limited by these terms. For example, the terms "upper" and "lower" below may be defined based on the Z direction shown in the drawings, respectively. The terms "front" and "rear" below may be defined based on the X direction shown in the drawings, respectively. The terms "left" and "right" below may be defined based on the Y direction shown in the drawings, respectively.

[0060] Hereinafter, embodiments according to the present invention will be described in detail with reference to the attached drawings.

[0061] FIG. 1 is a perspective view illustrating a washing machine according to one embodiment of the present disclosure. FIG. 2 is a cross-sectional view of the washing machine according to one embodiment of the present disclosure.

[0062] Referring to FIGS. 1 and 2, a washing machine (1) according to one embodiment of the present disclosure may include a main body (10) that accommodates various components therein. The main body (10) may form the exterior of the washing machine (1). A laundry inlet (11) may be formed on one side of the main body (10). The main body (10) may be formed in a box shape with the laundry inlet (11) formed approximately on one side. The laundry inlet (11) may be formed on the front side of the main body (10).

[0063] The main body (10) may include a control panel (15). The control panel (15) may include an input device (15a) configured to obtain user input. The control panel (15) may include a display (15b) configured to output operation information of the washing machine (1). That is, the control panel (15) may provide a user interface (UI) (15) for interaction between the user and the washing machine.

[0064] For example, the control panel (15) may be provided on the front of the main body (10). For example, the control panel (15) may be provided on the upper part of the main body (10).

[0065] The main body (10) may include a detergent box panel (16). The detergent box panel (16) may be coupled to the detergent box. The detergent box panel (16) may be provided so that a user can pull the detergent box out of the main body (10) or insert the detergent box into the main body (10) by gripping the detergent box panel (16).

[0066] For example, the detergent box panel (16) may be provided at the front of the main body (10) and may be coupled to the front of the detergent box. For example, the detergent box panel (16) may be provided at the upper part of the main body (10).

[0067] The washing machine (1) may include a door (41) configured to open and close the laundry inlet (11). The door (41) may be rotatably coupled to the main body (10) to open or close the laundry inlet (11). The door (41) may be rotatably coupled to the main body (10) by a hinge (42). The door (41) may be coupled to the front portion of the main body (10).

[0068] The washing machine (1) may include a tub (20) arranged inside the main body (10). The tub (20) may be provided to store mixed water containing washing water and detergent.

[0069] The tub (20) may have a tub opening (21) formed on one side. The tub opening (21) may be arranged to correspond to the laundry inlet (11). For example, the tub (20) may be formed in a cylindrical shape with the tub opening (21) formed on approximately one side.

[0070] The tub (20) can be connected to a damper (29). The tub (20) can be connected to the main body (10) by the damper (29). The tub (20) can be supported by the damper (29). The damper (29) can absorb vibrations generated when the drum (30) rotates and attenuate vibrations transmitted to the main body (10).

[0071] A washing machine (1) may include a drum (30) placed inside a tub (20). The drum (30) may be provided to accommodate laundry therein. The drum (30) may be provided to be rotatable within the tub (20) with respect to the tub (20). The drum (30) may perform each operation according to a cycle such as washing, rinsing, and spin-drying while rotating within the tub (20).

[0072] The drum (30) may have a drum opening (31) formed on one side. The drum opening (31) may be arranged to correspond to the laundry inlet (11) and the tub opening (21). Laundry may be introduced into the drum (30) by sequentially passing through the laundry inlet (11), the tub opening (21), and the drum opening (31). Conversely, laundry may be taken out of the drum (30) by sequentially passing through the drum opening (31), the tub opening (21), and the laundry inlet (11).

[0073] The drum (30) may include a plurality of holes (34) formed so that water stored in the tub (20) can flow into the drum (30) or water inside the drum (30) can be discharged outside the drum (30).

[0074] At least one lifter (35) may be installed on the inner surface of the drum (30) so that laundry can rise and fall when the drum (30) rotates.

[0075] The washing machine (1) may include a driving device (60) configured to rotate the drum (30). The driving device (60) may include a motor that generates power for rotating the drum (30) and a rotating shaft for transmitting the power generated by the motor to the drum (30). The rotating shaft may be connected to the drum (30) by penetrating the tub (20). The driving device (60) may perform each operation according to a washing cycle such as a washing cycle, a rinsing cycle, and a dehydration cycle, or a washing and drying cycle such as a washing cycle, a rinsing cycle, a dehydration cycle, and a drying cycle by rotating the drum (30) forward or reverse.

[0076] The washing machine (1) may include a water supply device (50) provided to supply washing water to the tub (20). The water supply device (50) may include a water supply pipe (51) connected to an external water source, and a water supply valve (52) provided to open and close the water supply pipe (51). The water supply pipe (51) may extend from the external water source to a detergent supply device (70), and washing water may be supplied to the tub (20) via the detergent supply device (70).

[0077] For example, the water supply pipe (51) can be placed at the upper part of the main body (10).

[0078] The washing machine (1) may include a detergent supply device (70). The detergent supply device (70) may be configured to supply detergent to the tub (20). The detergent supply device (70) may be configured to supply mixed water containing detergent and wash water to the tub (20).

[0079] The detergent supply device (70) may be configured to supply detergent contained in a detergent container, which stores detergent, into the interior of the tub (20) during the water supply process. Water supplied through the water supply pipe (51) may be mixed with detergent while passing through the detergent supply device (70). The water mixed with detergent may be supplied into the interior of the tub (20).

[0080] The detergent supply device (70) can be connected to the tub (20) through a connecting pipe (53). Water mixed with detergent from the detergent supply device (70) can be supplied into the interior of the tub (20) through the connecting pipe (53). Water mixed with detergent supplied to the tub (20) through the connecting pipe (53) can be stored inside the tub (20) along the wall of the tub (20).

[0081] For example, the detergent supply device (70) may be placed on the upper part of the main body (10). For example, the detergent supply device (70) may be placed on the upper part of the tub (20).

[0082] The washing machine (1) may include a drainage device (54) configured to discharge water inside the tub (20) to the outside. The drainage device (54) may include a drainage pipe (55) extending from the lower portion of the tub (20) to the outside of the main body (10), a drainage valve (56) configured to open and close the drainage pipe (55), and a drainage pump (57) provided on the drainage pipe (55).

[0083] The configurations of the washing machine (1) described above with reference to FIGS. 1 and 2 are merely examples of configurations that may be included in the washing machine (1) according to one embodiment of the present disclosure, and the washing machine (1) may include various configurations for performing functions such as washing laundry.

[0084] In the above, a front-loading type washing machine (1) has been described as an example with reference to FIGS. 1 and 2, but the washing machine according to the idea of ​​the present disclosure is not limited thereto and can be applied to, for example, a top-loading type washing machine.

[0085] FIG. 3 illustrates a control block of a washing machine according to one embodiment of the present disclosure.

[0086] In one embodiment, the washing machine (1) may include a user interface (15), a sensor unit (80), a driving device (60), a water supply device (50), a detergent supply device (70), a drainage device (54), and a control unit (100).

[0087] The user interface (15) may be provided by the control panel (15, see FIG. 1) described above.

[0088] The user interface (15) may include an input device (15a) for receiving user input.

[0089] The input device (15a) can receive setting values ​​related to the operation of the washing machine (1) from the user, or can receive various control commands. Types of user input that can be obtained through the input device (15a) may include turning the washing machine (1) on / off, starting / stopping the operation of the washing machine (1), setting the operation of the washing machine (1), etc. The input device (15a) may include various types of input devices such as a tact switch, a push switch, a slide switch, a toggle switch, a micro switch, a touch switch, a touch pad, a touch screen, a jog dial, and / or a microphone.

[0090] The user interface (15) may include a display (15b) for displaying information related to the operation or status of the washing machine (1).

[0091] The display (15b) may be electrically connected to the control unit (80) and may be configured to display information on the operation or status of the washing machine (1) based on a control signal received from the control unit (80). The operation or status information of the washing machine (1) that may be displayed by the display (15b) may include laundry quality information, setting information, operating time (or remaining time until the end of operation), information on the remaining amount of detergent, information on the occurrence of various errors, etc. The display (15b) may be configured to provide information to the user by including a light-emitting diode (LED) panel, an organic light-emitting diode (OLED) panel, or a liquid crystal display (LCD) panel. In addition, the display (15b) may include a touch screen including a touch pad that detects a user's touch. The touch screen may display setting values ​​or control commands that the user can select, and may receive setting values ​​or control commands according to a user's touch input.

[0092] The driving device (60) may include a motor (61) configured to rotate the drum (30). The driving device (60) may drive the motor (61) to rotate the drum (30) forward or backward, thereby performing each operation according to the washing cycle, the rinsing cycle, and / or the dehydration cycle. The motor (41) may be operated by a driving current applied from a driving circuit that drives the motor (41). The driving device (60) may be operated based on a control signal from the control unit (100).

[0093] The sensor unit (80) may include at least one sensor that obtains information related to the operating status of the washing machine (1) and / or information about laundry.

[0094] In one embodiment, the sensor unit (80) may include a current sensor (81) that detects the driving current applied to the motor (61) and / or a water level sensor (82) that measures the water level of the tub (20). The current sensor (81) and / or the water level sensor (82) may transmit sensor data to the control unit (100).

[0095] For example, the water level sensor (82) may be installed at the end of a connecting hose connected to a tub connecting pipe connected to the tub (20). At this time, the water level of the connecting hose may be the same as the water level of the tub (20). As the water level of the tub (20) rises, the water level of the connecting hose rises, and as the water level of the connecting hose rises, the pressure inside the connecting hose may increase.

[0096] The water level sensor (82) can detect the pressure inside the connecting hose and output an electrical signal corresponding to the detected pressure to the control unit (100). The control unit (100) can obtain the water level of the connecting hose, i.e., the water level of the tub (20), based on the pressure of the connecting hose detected by the water level sensor (82).

[0097] For example, the water level sensor (82) can detect a frequency that changes according to the pressure of the connecting hose.

[0098] In one embodiment, the control unit (100) can obtain the water level of the tub (20) by analyzing the frequency (water level frequency) of an electrical signal corresponding to the output value of the water level sensor (82).

[0099] Meanwhile, the water level sensor (82) can be installed inside the lower part of the tub (20). As the water level of the tub (20) rises, the pressure applied to the water level sensor (82) increases, and accordingly, the water level sensor (82) can detect a frequency that changes according to the water level when the drum (30) rotates.

[0100] In one embodiment, the control unit (100) can obtain the water level of the tub (20) by analyzing the frequency (water level frequency) of an electrical signal corresponding to the output value of the water level sensor (82).

[0101] In one embodiment, the control unit (100) can control the driving device (60), the water supply device (50), the detergent supply device (70), the drainage device (54), etc. to perform at least one operation including a washing operation, a rinsing operation, and / or a dehydration operation.

[0102] The control unit (100) can be electrically connected to a user interface (15), a sensor unit (80), a driving device (60), a water supply device (50), a detergent supply device (70), a drainage device (54), etc.

[0103] The control unit (100) may be composed of hardware such as a CPU, Micom, or memory, and software such as a control program.

[0104] The control unit (100) may be implemented by including at least one memory (102) storing algorithms for controlling the operations of components within the washing machine (1), data in the form of programs, and at least one processor (101) that performs the aforementioned operations using data stored in the at least one memory (102). In this case, the memory (102) and the processor (101) may each be implemented as separate chips. Alternatively, the memory (102) and the processor (101) may be implemented as a single chip.

[0105] The processor (101) can process output signals of a user interface (15), a sensor unit (80), a driving device (60), a water supply device (50), a detergent supply device (70), and / or a drainage device (54), and may include an operation circuit, a memory circuit, and a control circuit that output a control signal to the user interface (15), the sensor unit (80), the driving device (60), the water supply device (50), the detergent supply device (70), and / or the drainage device (54) based on the processed output signals.

[0106] The memory (102) may include volatile memory such as Static Random Access Memory (S-RAM) and Dynamic Random Access Memory (DRAM) for temporarily storing data. In addition, the memory (102) may include nonvolatile memory such as Read Only Memory (ROM), Erasable Programmable Read Only Memory (EPROM), and Electrically Erasable Programmable Read Only Memory (EEPROM) for long-term storage of data.

[0107] In one embodiment, the memory (102) may store a learned model, such as a machine learning model, which is an artificial intelligence model. As will be described later, the learned model may be learned to identify the quality of laundry by using at least one factor obtained by processing sensor data collected from various sensors of the washing machine (1) (e.g., a current sensor (81) and / or a water level sensor (82)) as input data.

[0108] In various embodiments, the learned model may be stored on the server or only on the server.

[0109] The processor (101) may include various logic circuits and operation circuits, process data according to a program provided from the memory (92), and generate a control signal according to the processing result.

[0110] When a method according to at least one embodiment of the present disclosure includes multiple operations, the multiple operations may be performed by one processor or by multiple processors. For example, when a first operation, a second operation, and a third operation are performed by a method according to at least one embodiment, the first operation, the second operation, and the third operation may all be performed by the first processor, or the first operation and the second operation may be performed by the first processor (e.g., a general-purpose processor) and the third operation may be performed by the second processor (e.g., an artificial intelligence-specific processor).

[0111] The control unit (100) may be mounted on a printed circuit board provided on the rear of the user interface (15), for example.

[0112] FIG. 4 illustrates an example of a flowchart of a method for controlling a washing machine according to one embodiment of the present disclosure.

[0113] Referring to FIG. 4, a washing machine (1) according to one embodiment can proceed with a washing cycle based on receiving a washing start command through a user interface (15).

[0114] In one embodiment, the washing machine (1) can provide multiple washing courses.

[0115] The user can select one of multiple washing courses through the user interface (15) and then start the selected washing course.

[0116] Laundry fabrics can be classified into cotton, blouse, silk, towels, etc.

[0117] The plurality of wash courses may include at least one wash course that specifies the quality of the laundry and a wash course that does not specify the quality of the laundry.

[0118] At least one washing course that specifies the quality of laundry may include not only washing courses in which the quality of laundry is included as part of the course name, such as 'cotton washing course', 'blouse washing course', and 'towel washing course', but may also include all washing courses in which the quality of laundry can be specified.

[0119] Washing courses that do not specify the quality of laundry may include a standard washing course, a general course, and / or an artificial intelligence washing course.

[0120] The control unit (100) can receive a washing start command from the washing machine (1) (200).

[0121] When a washing start command is received, the control unit (100) can detect the weight of laundry contained in the drum (30) (202).

[0122] The control unit (100) can detect the weight of the laundry by measuring the inertia by rotating the drum (30) while laundry is loaded into the drum (30). For example, the control unit (100) can repeatedly turn the motor (61) on and off. The weight of the laundry inside the drum (30) can be measured based on the counter electromotive force value generated when the motor (61) is turned off. In addition, the control unit (100) can rotate the drum (30) at a preset speed and measure the weight of the laundry inside the drum (30) based on the time taken for the drum (30) to reach the preset speed. In addition, the weight of the laundry can be acquired through a separate weight sensor.

[0123] The control unit (100) may start detecting the quality of laundry if the weight of the laundry is less than or equal to a preset weight. If the weight of the laundry exceeds the preset weight, the control unit (100) may not start detecting the quality of laundry.

[0124] The control unit (100) can perform dry agitation by rotating the drum (30) while the laundry is in a dry state (204). Dry agitation may include rotating the drum (30) so that the laundry in a dry state that is not wet with water is agitated.

[0125] The control unit (100) can perform dry agitation by driving the motor (61) to rotate the drum (30) before water supply.

[0126] The control unit (100) can detect the driving current (hereinafter referred to as the dry current) of the motor (61) through the current sensor (81) during the drying agitation (206). The control unit (100) can obtain the dry current of the motor (61) detected by the current sensor (81) as the drum (30) rotates in the dry state of the laundry. The dry current value can include an average value of the driving current values ​​of the motor (61) detected by the current sensor (81) in the dry state of the laundry. In other words, it can include an average value of the driving current values ​​applied to the motor (61) when the drum (30) rotates in the dry state of the laundry.

[0127] The control unit (100) can perform the first water supply after the dry stirring (208).

[0128] The control unit (100) can supply washing water to the tub (20) through the water supply device (50) after stirring the dry cloth.

[0129] The control unit (100) turns on the water supply valve (52) of the water supply device (50). When the water supply valve (52) is turned on, washing water supplied from an external water source is supplied to the detergent supply device (70) through the water supply pipe (51). The washing water supplied to the detergent supply device (70) is mixed with the detergent in the detergent supply device (70). The mixed water in which the washing water and detergent are mixed in the detergent supply device (70) flows along the inner wall of the tub (20) through the connecting pipe (53) connected to the tub (20) and rises from the lower side of the tub (20). The mixed water supplied to the tub (20) wets the laundry contained in the drum (30).

[0130] In addition, the control unit (100) can supply water mixed with a predetermined amount of detergent to the tub (20) through the water supply device (50) and the detergent supply device (70) after the dry powder is stirred.

[0131] The control unit (100) can control the detergent supply device (70) so that a predetermined amount of detergent is supplied to the tub (20). Accordingly, the washing water supplied to the detergent supply device (70) from the water supply device (50) is mixed with a predetermined amount of detergent in the detergent supply device (70), and then flows along the wall of the tub (20) through the connecting pipe (53) and is stored in the tub (20).

[0132] The control unit (100) can supply a predetermined amount of water to the tub (20) from the first water supply by controlling the on time of the water supply valve (52). The predetermined amount of water can be an amount of water corresponding to the water supplied into the drum (30) reaching a target water level. The target water level can be an appropriate water level that can obtain a driving current of the motor (61) in the wet cloth agitation that rotates the drum (30) while the laundry is in a wet cloth state. For example, the control unit (100) can control the on time of the water supply valve (52) according to the weight of the laundry.

[0133] The control unit (100) can perform a first wet agitation to rotate the drum (30) after the first water supply while the laundry is in a wet state (210). The water supplied to the tub (20) in the first water supply wets the laundry contained in the drum (30), so that the laundry becomes wet. The water that flows along the wall of the tub (20) and is stored alone may not sufficiently wet the laundry in the drum (30). Therefore, the control unit (100) can drive the motor (61) to rotate the drum (30) in the first wet agitation to absorb the water stored in the tub (30) into the laundry contained in the drum (30), thereby wetting the laundry.

[0134] The control unit (100) can obtain the amount of change in the water level of the tub (20) through the water level sensor (82) during the first wet cloth stirring (212). The water level of the tub (20) when the first wet cloth stirring starts and the water level of the tub (20) when the first wet cloth stirring is completed differ depending on the amount of water absorbed by the laundry during the first wet cloth stirring. Through this, the moisture content characteristics of the laundry can be determined. When the moisture content characteristics of the laundry according to the amount of change in the water level are used to detect the quality of the laundry, even if the motor and platform of the washing machine (1) are changed, the set deviation and model deviation can be minimized as long as the tub shape is the same.

[0135] The control unit (100) can perform a second wet agitation by rotating the drum (30) after the first wet agitation (214). Through two wet agitation cycles of the first wet agitation and the second wet agitation, the wetness can be maximized while supplying a minimum amount of water.

[0136] The control unit (100) can detect the driving current (hereinafter, “wet cloth current”) of the motor (61) through the current sensor (81) during the second wet cloth stirring (216). The control unit (100) can obtain the wet cloth current of the motor (61) detected by the current sensor (81) as the drum (30) rotates in the wet cloth state of the laundry. The wet cloth current value can include an average value of the driving current values ​​of the motor (61) detected by the current sensor (81) in the wet cloth state of the laundry. In other words, it can include an average value of the driving current values ​​applied to the motor (61) when the drum (30) rotates in the wet cloth state of the laundry.

[0137] The control unit (100) can identify the fabric quality of the laundry based on the dry cloth current value detected during the dry cloth stirring, the water level change detected during the first wet cloth stirring, and the wet cloth current value detected during the second wet cloth stirring (218). For example, the control unit (100) can identify the fabric quality of the laundry as one of cotton, blouse, silk, towel, etc.

[0138] Meanwhile, the control unit (100) can identify the quality of laundry by inputting the dry current value detected during dry stirring, the water level change detected during the first wet stirring, and the wet current value detected during the second wet stirring into the learned model.

[0139] In one embodiment, the learned model may be stored in memory (102) and / or an external device (e.g., a server).

[0140] When the learned model is stored in the memory (102), the control unit (100) can identify the quality of laundry by inputting the dry current value, wet current value, and water level change amount into the learned model stored in the memory (102).

[0141] When the learned model is stored only in an external device, the control unit (100) transmits information on the dry current value, the wet current value, and the amount of change in water level to the external device through the communication unit, and the external device obtains information on the quality of the laundry by inputting the dry current value, the wet current value, and the amount of change in water level received from the washing machine (1) into the learned model, and the external device transmits information on the quality of the laundry to the washing machine (1), and as a result, the control unit (100) can identify the quality of the laundry.

[0142] That is, the operation of the control unit (100) identifying the quality of laundry by inputting the dry current value, the wet current value, and the amount of change in water level into the learned model may include the operation of the control unit (100) identifying the quality of laundry by inputting the dry current value, the wet current value, and the amount of change in water level into the learned model stored in the memory (102), and / or the operation of the control unit (100) transmitting information about the dry current value, the wet current value, and the amount of change in water level to an external device in which the learned model is stored through the communication unit, and receiving information about the quality of laundry from the external device, thereby identifying the quality of laundry.

[0143] Such a learned model can be trained based on data related to the foam identified by the learned model based on the dry current value, wet current value, and water level change amount.

[0144] FIG. 5 illustrates an example of a timing diagram for detecting foam in a washing machine according to one embodiment of the present disclosure.

[0145] Referring to Fig. 5, the left vertical axis represents the rotational speed (RPM) of the motor (61), and the right vertical axis represents the frequency (Hz). The horizontal axis represents time.

[0146] The water level sensor (82) generally detects a lower water level frequency as the water level of the tub (20) increases, and may detect a higher water level frequency as the water level of the tub (20) decreases. When there is no water in the tub (20), a water level frequency of around 25300 Hz is detected.

[0147] t1 to t2 are weight detection periods.

[0148] The weight detection section is a section that detects the weight of laundry contained in the drum (30) by rotating the drum (30) when a washing start command is received.

[0149] For example, in the weight detection section, the operation of increasing the rotation speed of the motor (61) to around 140 RPM and then turning it off is repeatedly performed, and the weight of laundry inside the drum (30) can be measured based on the counter electromotive force value generated when the motor (61) is turned off.

[0150] t2 to t3 are dry mixing sections.

[0151] The dry laundry agitation section is a section in which the drum (30) rotates so that the dry laundry that is not wet with water is agitated before the first water supply.

[0152] For example, in the dry mixing section, the operation of increasing and maintaining the rotation speed of the motor (61) to around 40 RPM can be repeatedly performed.

[0153] As the drum (30) rotates in the dry mixing section, the dry current of the motor (61) can be detected through the current sensor (81).

[0154] For example, when the drum (30) rotates in the dry mixing section, the average value of the dry current applied to the motor (61) can be obtained as the dry current value.

[0155] T4 to T5 are the first water supply sections, the water injection sections.

[0156] The t3 to t4 interval may be a free-flow interval.

[0157] The water injection section is the section where the first water supply is performed after the dry powder is stirred.

[0158] After the dry cleaning is completed, washing water can be supplied to the tub (20) through the water supply device (50).

[0159] For example, the on time of the water supply valve (52) can be controlled so that the amount of water corresponding to the weight of the laundry is supplied. Washing water supplied from an external water source is supplied to the detergent supply device (70) through the water supply pipe (51). The washing water supplied to the detergent supply device (70) is mixed with the detergent in the detergent supply device (70). The mixed water in which the washing water and detergent are mixed in the detergent supply device (70) flows along the inner wall of the tub (20) through the connecting pipe (53) connected to the tub (20) and rises from the lower side of the tub (20). The mixed water supplied to the tub (20) wets the laundry contained in the drum (30).

[0160] t5 to t6 is the first wet stirring section.

[0161] The first wet cloth agitation section is a section in which the drum (30) rotates so that the wet cloth laundry soaked in water by the first water supply is agitated.

[0162] The water supplied to the tub (20) in the first water supply wets the laundry contained in the drum (30), and the laundry becomes wet. However, since the water flowing along the wall of the tub (20) and stored alone is not sufficient to wet the laundry in the drum (30), the water stored in the tub (30) is rotated in the first wet stirring, so that the laundry can be wetted by absorbing it.

[0163] In the first wet stirring section, the amount of change in the water level of the tub (20) can be obtained through the water level sensor (82).

[0164] Depending on the amount of water absorbed by the laundry in the first wet cloth agitation section, the water level of the tub (20) when the first wet cloth agitation begins and the water level of the tub (20) when the first wet cloth agitation is completed differ. From this water level difference, the amount of change in the water level of the tub (20) in the first wet cloth agitation section can be measured.

[0165] For example, if the laundry material is a blouse with a low moisture content, the change in water level in the tub (20) is small, and if the laundry material is a towel with a high moisture content, the change in water level in the tub (20) is large. Therefore, the change in water level can reflect the moisture content characteristics of the laundry.

[0166] T6 to T7 are additional water supply sections, which are the second water supply sections.

[0167] The additional water supply section is a section that supplies additional water when the water level of the tub (20) is insufficient.

[0168] If the water level in the tub (20) is not sufficient after the first wet stirring, the characteristics of the foam can be maximized in the second wet stirring section by supplying supplementary water.

[0169] For example, in the case of a blouse with a low moisture content, no make-up water is added because the water level is sufficient before the second wet agitation is started after the first wet agitation. However, in the case of a towel with a high moisture content, make-up water can be added because the water level is low before the second wet agitation is started after the first wet agitation. Therefore, it is possible to detect the moisture content characteristics of the laundry by ensuring that the laundry has a sufficient moisture content during the second wet agitation section. In this way, the amount of water used can be minimized by adding the minimum amount of water according to the weight of the laundry in the first water supply and then adding additional water if necessary in the second water supply.

[0170] t7 to t8 are the second wet stirring sections.

[0171] The second wet cloth agitation section is a section in which the drum (30) rotates so that the wet cloth laundry is agitated after the first wet cloth agitation. In the second wet cloth agitation section, the second wet cloth agitation may be performed immediately after the first wet cloth agitation, or the second wet cloth agitation may be performed after the first wet cloth agitation and the second water supply.

[0172] By performing two rounds of wet agitation, the first wet agitation and the second wet agitation, we can maximize the wetness while supplying the minimum amount of water.

[0173] As the drum (30) rotates in the second wet stirring section, the wet current of the motor (61) can be detected through the current sensor (81).

[0174] For example, when the drum (30) rotates in the second wet stirring section, the average value of the wet current applied to the motor (61) can be obtained as the wet current value.

[0175] The quality of the laundry can be identified based on the dry cloth current value detected during the dry cloth stirring, the water level change detected during the first wet cloth stirring, and the wet cloth current value detected during the second wet cloth stirring. For example, the quality of the laundry can be identified as one of cotton, blouse, silk, towel, etc.

[0176] FIG. 6 illustrates laundry quality classification by input element using a learned model of a washing machine according to one embodiment of the present disclosure.

[0177] Referring to Figure 6, the laundry material is shown as cotton, a blouse, which is a delicate garment, and a towel.

[0178] For cotton, blouses and towels, a scatter plot of each graph or a combination of the two is shown: dry current (DRY_CURRENT), wet current (WET_CURRENT) and water level change (WATER_LEVEL_DIFF).

[0179] In dry conditions, the dry current (DRY_CURRENT) of the blouse is the highest compared to cotton or a towel, and in wet conditions, the wet current (WET_CURRENT) of the towel is the highest compared to cotton or a blouse, and the water level change (WATER_LEVEL_DIFF) of the towel is the highest compared to cotton or a blouse.

[0180] The dry current (DRY_CURRENT), wet current (WET_CURRENT) and water level change (WATER_LEVEL_DIFF) of cotton, blouse and towel are shown.

[0181] Additionally, the relationship between the dry current (DRY_CURRENT) and the wet current (WET_CURRENT) of cotton, blouses, and towels, the relationship between the dry current (DRY_CURRENT) and the amount of change in water level (WATER_LEVEL_DIFF), and the relationship between the wet current (WET_CURRENT) and the amount of change in water level (WATER_LEVEL_DIFF) are shown.

[0182] It can be confirmed that the quality of laundry can be classified by inputting at least two of the learned models: dry current (DRY_CURRENT), wet current (WET_CURRENT), and water level change (WATER_LEVEL_DIFF).

[0183] FIG. 7 illustrates the classification of laundry quality when dry current, wet current, and water level difference are input into a learned model of a washing machine according to one embodiment of the present disclosure.

[0184] Referring to Figure 7, a three-dimensional scatter plot of laundry quality according to dry current (DRY_CURRENT), wet current (WET_CURRENT), and water level change (WATER_LEVEL_DIFF) is shown.

[0185] By inputting all of the dry current (DRY_CURRENT), wet current (WET_CURRENT), and water level change (WATER_LEVEL_DIFF) into the learned model, we can confirm that the quality of the laundry can be classified more accurately.

[0186] Meanwhile, in general, the motor current-based foam detection method detects the foam of the laundry based on the difference in characteristics between the dry and wet states of each laundry, so wetting the laundry is essential during foam detection. The existing method requires a direct water valve that can supply water from the top of the laundry to make the laundry into a wet state, and since the water supplied through this direct water valve does not contain detergent, a separate process of supplying washing water together with detergent is also essential after foam detection is complete. This foam detection structure essentially requires a sufficient supply of washing water along with the direct water valve, so there is a limitation in that foam detection cannot be applied to washing machine models without a direct water valve or washing machine models that must use minimal water.

[0187] One embodiment of the present disclosure utilizes a structure and foam quality detection method that eliminates the need for a direct water valve and minimizes water usage. To achieve this, two cycles of wet cloth agitation—first and second—are performed to maximize foam wetting while supplying minimal wash water. Therefore, by eliminating the need for a direct water valve, foam quality detection can be extended to models without a direct water valve, minimizing water usage while reducing energy consumption.

[0188] FIG. 8 illustrates an example of wet cloth agitation of a washing machine according to one embodiment of the present disclosure.

[0189] Referring to Fig. 8, when the first wet stirring starts (300), the control unit (100) can detect the water level value of the tub (20) through the water level sensor (82) (302). The detected water level value can be stored in the memory (102).

[0190] When the first wet cloth stirring starts, the control unit (100) can detect the wet cloth current (hereinafter referred to as the first wet cloth current) of the motor (61) through the current sensor (81) as the drum (30) rotates (304). The detected first wet cloth current value can be stored in the memory (102). The first wet cloth current value can be an average value of the first wet cloth current values ​​detected in the first wet cloth stirring section.

[0191] When the first wet stirring is completed (306), the control unit (100) can compare the water level values ​​stored in the memory (102) to determine the amount of water level change (308). For example, the amount of water level change can be determined as the water level difference value (wl_diff) between the maximum water level value (wl_max) and the minimum water level value (wl_min) among the low-level water level values ​​stored in the memory (102).

[0192] The control unit (100) can determine whether to perform the second water supply based on the water level value measured by the water level sensor (82) after the first wet stirring. Based on the determination to perform the second water supply, the control unit (100) can perform the second water supply after the first wet stirring, and perform the second wet stirring after the second water supply.

[0193] More specifically, the control unit (100) can determine whether the current water level of the tub (20) is higher than a preset water level after the first wet stirring is completed (310).

[0194] If the current water level of the tub (20) is lower than a preset water level, the control unit (100) can supply water to the tub (20) through a second water supply (312). For example, the preset water level may be a water level value corresponding to a preset water supply amount for supplying a minimum amount of water. For example, the water level may be a water level corresponding to a water level frequency of 24100 Hz. At this time, the water supply amount of the second water supply can be determined based on the water level value of the tub (20). The water supply amount of the second water supply may be a required water supply amount for the water level value of the tub (20) to reach the preset water level.

[0195] The control unit (100) can start the second wet stirring without supplying water if the current water level of the tub (20) is higher than the preset water level (314).

[0196] FIG. 9 illustrates changes in moisture content between towels and delicate laundry during the first wet cloth agitation of a washing machine according to an embodiment of the present disclosure. FIG. 10 illustrates changes in tub water level according to laundry quality of a washing machine according to an embodiment of the present disclosure.

[0197] Referring to Figures 9 and 10, if the laundry is a delicate garment, the moisture content is low, and if it is a towel, the moisture content is high.

[0198] Accordingly, in the case of delicate garments, since the moisture content is low, the water absorption is low, and thus the water level in the tub is relatively high. However, in the case of towels, since the moisture content is high, the water absorption is high, and thus the water level in the tub is relatively low. As a result, a difference in the water level in the tub (20) may occur between delicate garments and towels due to the first wet cloth stirring.

[0199] In the case of delicate clothes, since the moisture content is small, the water level is sufficient before starting the second wet cloth agitation after the first wet cloth agitation, so no make-up water is added. However, in the case of towels, since the moisture content is large, the water level is low before starting the second wet cloth agitation after the first wet cloth agitation, so make-up water can be added. In this way, by supplying make-up water when the water level in the tub (20) is insufficient after the first wet cloth agitation, the characteristics of the fabric can be maximized in the second wet cloth agitation section. Therefore, the amount of water used can be minimized by supplying the minimum amount of water according to the weight of the laundry in the first water supply and then supplying additional water if necessary in the second water supply.

[0200] Referring again to FIG. 8, the control unit (100) can detect the wet current (hereinafter referred to as the second wet current) of the motor (61) through the current sensor (81) as the drum (30) rotates when the second wet stirring begins (316). The detected second wet current value can be stored in the memory (102). The second wet current value can be an average value of the second wet current values ​​detected in the second wet stirring section.

[0201] When the second wet cloth stirring is completed (318), the control unit (100) can identify the quality of the laundry based on the dry cloth current value detected during the dry cloth stirring, the water level change detected during the first wet cloth stirring, the second wet cloth current value detected during the second wet cloth stirring, and the wet cloth current difference value between the first wet cloth current value and the second wet cloth current value. For example, the quality of the laundry can be identified as one of cotton, blouse, silk, towel, etc.

[0202] Meanwhile, the control unit (100) can identify the quality of laundry by inputting the dry current value detected during dry stirring, the water level change detected during first wet stirring, the second wet current value detected during second wet stirring, and the wet current difference value between the first wet current value and the second wet current value into the learned model.

[0203] In this way, by reflecting the difference in wet cloth current obtained by subtracting the first wet cloth current value detected during the first wet cloth stirring from the second wet cloth current value detected during the second wet cloth stirring when identifying the quality of the laundry, the influence of the current off value for each set can be eliminated.

[0204] Meanwhile, in the second water supply section, which is an additional water supply section, the moisture content of the laundry can be obtained based on the difference in the additional water supply time, and the quality of the laundry can be identified based on the moisture content of the laundry.

[0205] FIG. 11 illustrates the difference in additional water supply time according to laundry quality in a washing machine according to one embodiment of the present disclosure.

[0206] Referring to Figure 11, since additional water is supplied to the extent of the insufficient water level in the additional water supply section, a difference in the supply time of the supplementary water may occur depending on the moisture content characteristics of the laundry.

[0207] For example, the graph shows the on / off of the water supply valve (52) of “2 kg towel” and “1 kg delicate” which have the highest functional contents.

[0208] As shown in the graph, it can be seen that the additional water supply time is long for towels with a high moisture content, and the additional water supply time is short for delicate garments with a low moisture content. For example, the additional water supply time (ΔT1) for a 2 kg towel may be 5.4 seconds, and the additional water supply time (ΔT2) for a 1 kg delicate garment may be 0.2 seconds.

[0209] In this way, the moisture content of the laundry can be obtained based on the difference in the additional water supply time in the additional water supply section, and the quality of the laundry can be identified based on the moisture content of the laundry.

[0210] Additionally, the moisture content of the laundry can be obtained based on the difference in additional water supply time as well as the presence or absence of additional water supply.

[0211] Since additional water is supplied to compensate for the insufficient water level after the first wet cloth agitation, additional water supply may not operate when low-weight / low-moisture content laundry is added. Accordingly, the number of times the water supply valve (52) is controlled differs between when there is no laundry in the drum (30) and when there is high-moisture content laundry in the drum (30). The presence or absence of additional water supply can be determined from the number of times the water supply valve (52) is controlled.

[0212] FIG. 12 is a flowchart illustrating an operation of adding a minimum amount of detergent during foam detection in a washing machine according to one embodiment of the present disclosure and then adding the remaining amount of detergent after foam detection in laundry.

[0213] Referring to FIG. 12, the control unit (100) can determine a first amount of detergent based on the weight of the laundry detected before the first wet cloth agitation in the first water supply. The control unit (100) can control the detergent supply device (70) and the water supply device (50) to supply the first amount of detergent to the tub (20).

[0214] The control unit (100) can determine a second amount of detergent based on the laundry quality in response to the laundry quality being identified. The control unit (100) can control the detergent supply device (70) and the water supply device (50) to additionally supply the second amount of detergent to the tub (20).

[0215] More specifically, when a washing start command is received (400), the weight of the laundry is detected (402), dry cloth agitation is performed (404), a first water supply is performed that injects the minimum amount of detergent according to the weight of the laundry together with the wash water (406), a first wet cloth agitation is performed (408), a second water supply is performed (410), a second wet cloth agitation is performed (412), the quality of the laundry is identified (414), and an optimal amount of detergent according to the quality of the laundry is injected (416).

[0216] A washing machine according to one embodiment of the present disclosure can dispense detergent during foam detection, unlike conventional foam detection. This characteristic allows for a unique detergent dispensing method, unlike conventional foam detection.

[0217] In conventional foam detection, detergent is injected after foam detection is complete. Therefore, conventional methods separate the process for injecting detergent optimized for each foam type. However, in the washing machine according to one embodiment of the present disclosure, detergent is injected during foam detection, so it can first inject the minimum amount of detergent based on weight detection results, then detect the foam type of the laundry, and then inject the optimal detergent for each foam type.

[0218] FIG. 13 is a flowchart illustrating an operation of outputting information on the start of a washing cycle during foam detection in a washing machine according to one embodiment of the present disclosure.

[0219] Referring to FIG. 13, the control unit (200) can output information on the start of the quality detection through the user interface (15) between the weight detection of the laundry and the stirring of the dry cloth.

[0220] The control unit (200) can output information about the start of the washing process through the user interface (15) between the dry cloth stirring and the first water supply.

[0221] More specifically, when a washing start command is received (500), the weight of the laundry is detected (502), the start of the quality detection is indicated (504), dry cloth agitation is performed (506), the start of the washing cycle is indicated (508), the first water supply is performed (510), the first wet cloth agitation is performed (512), the second water supply is performed (514), the second wet cloth agitation is performed (516), the quality of the laundry is identified (518), and the completion of quality detection and the quality identification result are displayed (520).

[0222] According to one embodiment of the present disclosure, the washing machine dispenses detergent during the detection of the dry laundry current. Therefore, from a washing cycle perspective, the washing cycle can be considered to begin from that point, as detergent is dispensed after the dry laundry current is detected. This necessitates changes to the existing user interface.

[0223] Since conventional foam detection begins the washing cycle after foam detection, information regarding the start of the washing cycle is displayed after foam detection. However, since the washing machine according to one embodiment of the present disclosure begins the washing cycle, in which wash water and detergent are added simultaneously, during foam detection, information regarding the start of the washing cycle can be displayed during foam detection.

[0224] A washing machine (1) according to one embodiment of the present disclosure may include: a tub; a water level sensor for measuring a water level of the tub; a drum rotatably provided in the tub and containing laundry; a motor for rotating the drum; a current sensor for detecting a driving current of the motor; and at least one processor for performing dry laundry agitation by rotating the drum before water supply, performing a first water supply after the dry laundry agitation, performing a first wet laundry agitation by rotating the drum after the first water supply, performing a second wet laundry agitation by rotating the drum after the first wet laundry agitation, and identifying a quality of the laundry based on a dry laundry current value detected by the current sensor during the dry laundry agitation, a water level change amount measured by the water level sensor during the first wet laundry agitation, and a wet laundry current value detected by the current sensor during the second wet laundry agitation.

[0225] A memory storing a model learned to identify the quality of the laundry is included, and the at least one processor can input the dry current value, the wet current value, and the water level change amount into the learned model to identify the quality of the laundry.

[0226] The at least one processor may determine whether to perform a second supply of water based on a water level value measured by the water level sensor after the first wet cloth stirring, perform the second supply of water based on whether the second supply of water is to be performed after the first wet cloth stirring, perform the second wet cloth stirring after the second supply of water, and identify the quality of the laundry based on the dry cloth current value, the wet cloth current value, the amount of change in water level, and the difference in the wet cloth current of the motor in the first wet cloth stirring and the second wet cloth stirring.

[0227] A memory storing a model learned to identify the quality of the laundry is included, and the at least one processor can input the dry current value, the wet current value, the water level change amount, and the wet current difference value into the learned model to identify the quality of the laundry.

[0228] The at least one processor can determine the amount of the second water supply based on the water level value.

[0229] The detergent supply device is connected to the tub through a connecting pipe; and a water supply device that supplies water to the detergent supply device so that water mixed with detergent is supplied along the wall of the tub through the connecting pipe; wherein the at least one processor can control the detergent supply device and the water supply device so that only water without detergent is supplied to the tub from the second water supply.

[0230] A detergent supply device connected to the tub through a connecting pipe; and a water supply device supplying water to the detergent supply device so that water mixed with detergent is supplied along a wall surface of the tub through the connecting pipe; wherein the at least one processor controls the detergent supply device and the water supply device so that a first amount of detergent determined based on the weight of the laundry detected before the first wet cloth agitation is injected into the tub in the first water supply, and in response to the foam quality being identified, controls the detergent supply device and the water supply device so that a second amount of detergent determined based on the foam quality of the laundry is additionally injected into the tub.

[0231] The above water supply device may include a water supply pipe connecting an external water source and the detergent supply device, and a water supply valve for opening and closing the water supply pipe.

[0232] A user interface; further comprising at least one processor capable of controlling the user interface to output information about the start of a washing cycle between the drying agitation and the first water supply.

[0233] The at least one processor may perform a washing cycle based on the quality of the laundry.

[0234] A control method of a washing machine (1) according to one embodiment of the present disclosure may include: performing dry laundry agitation by controlling a motor to rotate a drum before water supply; performing a first water supply after the dry laundry agitation; performing a first wet laundry agitation by rotating the drum after the first water supply; performing a second wet laundry agitation by rotating the drum after the first wet laundry agitation; and identifying a quality of laundry accommodated in the drum based on a dry laundry current value of the motor detected during the dry laundry agitation, a water level change amount of a tub measured during the first wet laundry agitation, and a wet laundry current value of the motor detected during the second wet laundry agitation.

[0235] The method may include a memory storing a model learned to identify the quality of the laundry, and identifying the quality of the laundry may include inputting the dry current value, the wet current value, and the water level change amount into the learned model to identify the quality of the laundry.

[0236] The method may further include determining whether to perform a second water supply based on a water level value of the tub after the first wet cloth stirring, performing the second water supply after the first wet cloth stirring based on whether the second water supply is to be performed, and performing the second wet cloth stirring after the second water supply, and identifying the laundry quality may include identifying the laundry quality based on the dry cloth current value, the wet cloth current value, the water level change amount, and the wet cloth current difference value of the motor in the first wet cloth stirring and the second wet cloth stirring.

[0237] The method may include a memory storing a model learned to identify the quality of the laundry, and identifying the quality of the laundry may include inputting the dry current value, the wet current value, the water level change amount, and the wet current difference value into the learned model to identify the quality of the laundry.

[0238] It may further include determining the amount of water supplied to the second water supply based on the water level value.

[0239] The detergent supply device connected to the above tub through a connecting pipe; and a water supply device that supplies water to the detergent supply device so that water mixed with detergent is supplied along the wall of the tub through the connecting pipe; and performing the second water supply may include controlling the detergent supply device and the water supply device so that only water without detergent is supplied to the tub in the second water supply.

[0240] The detergent supply device connected to the tub through a connecting pipe; and a water supply device supplying water to the detergent supply device so that water mixed with detergent is supplied along a wall surface of the tub through the connecting pipe; wherein performing the first water supply includes controlling the detergent supply device and the water supply device so that, in the first water supply, a first amount of detergent determined based on the weight of the laundry detected before the first wet cloth agitation is injected into the tub, and may further include controlling the detergent supply device and the water supply device so that, in response to the foam quality being identified, a second amount of detergent determined based on the foam quality of the laundry is additionally injected into the tub.

[0241] The above water supply device may include a water supply pipe connecting an external water source and the detergent supply device, and a water supply valve for opening and closing the water supply pipe.

[0242] The method may further include controlling the user interface to output information about the start of a washing cycle between the drying agitation and the first water supply.

[0243] It may further include performing a washing cycle based on the quality of the laundry.

[0244] Meanwhile, the disclosed embodiments may be implemented in the form of a storage medium storing computer-executable instructions. The instructions may be stored in the form of program code, and when executed by a processor, may generate program modules to perform the operations of the disclosed embodiments.

[0245] A device-readable storage medium may be provided in the form of a non-transitory storage medium. Here, the term "non-transitory storage medium" simply means a tangible device that does not contain signals (e.g., electromagnetic waves). This term does not distinguish between cases where data is permanently stored in the storage medium and cases where data is temporarily stored. For example, a "non-transitory storage medium" may include a buffer in which data is temporarily stored.

[0246] According to one embodiment, the method according to various embodiments disclosed in the present document may be provided as included in a computer program product. The computer program product may be traded as a product between a seller and a buyer. The computer program product may be distributed in the form of a machine-readable storage medium (e.g., compact disc read only memory (CD-ROM)), or may be distributed online (e.g., downloaded or uploaded) via an application store (e.g., Play Store™) or directly between two user devices (e.g., smartphones). In the case of online distribution, at least a portion of the computer program product (e.g., a downloadable app) may be temporarily stored or temporarily generated in a machine-readable storage medium, such as the memory of a manufacturer's server, an application store's server, or an intermediary server.

[0247] The disclosed embodiments have been described with reference to the attached drawings as described above. Those skilled in the art will understand that the present invention can be implemented in forms other than the disclosed embodiments without altering the technical spirit or essential features of the present invention. The disclosed embodiments are illustrative and should not be construed as limiting.

Claims

1. A tub capable of holding water; A water level sensor that measures the water level contained in the above tub; A rotatable drum provided within the tub and capable of accommodating laundry; A motor that rotates the drum based on the driving current applied to the motor; A current sensor that detects the driving current applied to the motor; and With laundry stored in the drum above, Rotating the drum by the motor to perform dry agitation before supplying water to the tub, and detecting a dry current value corresponding to the driving current detected by the current sensor during the dry agitation, After the above-mentioned drying stirring, water is supplied to the above-mentioned tub to perform the first water supply, The drum is rotated by the motor to perform the first wet stirring after the first wet stirring, and the amount of change in water level measured by the water level sensor is detected during the first wet stirring. The drum is rotated by the motor to perform a second wet stirring after the first wet stirring, and a wet stirring current value corresponding to the driving current detected by the current sensor is detected during the second wet stirring, A washing machine comprising at least one processor configured to identify the quality of the laundry based on the dry current value, the water level change amount, and the wet current value.

2. In paragraph 1, The above washing machine, Further comprising a memory for storing a model learned to identify the quality of the laundry based on the dry current value, the water level change amount, and the wet current value, At least one processor, With laundry stored in the drum above, A washing machine further configured to identify the quality of the laundry by inputting the dry current value, the water level change amount, and the wet current value into the learned model.

3. In paragraph 1, At least one processor, With laundry stored in the drum above, Based on the water level measured by the water level sensor after the first wet cloth stirring, it is determined whether to supply water to the tub so as to perform a second water supply after the first wet cloth stirring, Based on the decision to perform the second watering, water is supplied to the tub after the first wet stirring, After the second water supply, the second wet stirring is performed, A washing machine further configured to identify the quality of the laundry based on the difference between the dry current value, the water level change amount, the wet current value, and another wet current corresponding to the driving current detected by the current sensor during the first wet current stirring and the wet current value.

4. In paragraph 3, The above washing machine, A memory storing a model learned to identify the quality of the laundry based on the dry current value, the water level change amount, the wet current value, and the difference, At least one processor, A washing machine further configured to input the dry current value, the wet current value, the water level change amount, and the difference while laundry is stored in the drum.

5. In paragraph 3, At least one processor, With laundry stored in the drum above, A washing machine further configured to determine the amount of water supplied to the second water supply based on the water level measured by the water level sensor after the first wet cloth stirring.

6. In paragraph 3, The above washing machine, A detergent supply device that receives detergent to be supplied to the above tub and is connected to the above tub through a connecting pipe; and Further comprising a water supply device that supplies water to the detergent supply device so that the detergent contained in the detergent supply device and the supplied water are mixed and the mixed water and detergent are supplied to the tub along the wall of the tub through the connecting pipe; At least one processor, With laundry stored in the drum above, A washing machine further configured to control the detergent supply device and the water supply device so that only water without detergent is supplied to the tub during the second water supply.

7. In paragraph 1, The above washing machine, A detergent supply device that receives detergent to be supplied to the above tub and is connected to the above tub through a connecting pipe; and Further comprising a water supply device that supplies water to the detergent supply device so that the detergent contained in the detergent supply device and the supplied water are mixed and the mixed water and detergent are supplied to the tub along the wall of the tub through the connecting pipe; At least one processor, With laundry stored in the drum above, The first amount of detergent supplied to the tub is determined based on the weight of the laundry detected before the first wet cloth stirring, During the first water supply, the detergent supply device and the water supply device are controlled so that the first amount of detergent is supplied to the tub, and the second amount of detergent supplied to the tub is determined based on the quality of the identified laundry. A washing machine that controls the detergent supply device and the water supply device so that the second amount of detergent is additionally injected into the tub in response to the identification of the quality of the laundry.

8. In paragraph 7, The above washing machine, Including the above water supply device, The above water supply device, A washing machine including a water supply pipe connecting an external water source and the detergent supply device, and a water supply valve that opens and closes the water supply pipe.

9. In paragraph 1, The above washing machine, including a user interface; At least one processor, A washing machine further configured to control the user interface to output information regarding the start of a washing cycle between the drying agitation and the first water supply while laundry is accommodated in the drum.

10. In paragraph 9, At least one processor, With laundry stored in the drum above, A washing machine further configured to perform a washing cycle based on the quality of the identified laundry.

11. A control method for a washing machine including a tub capable of receiving water, a water level sensor for measuring the water level contained in the tub, a rotatable drum provided in the tub and capable of receiving laundry, a motor for rotating the drum based on a driving current applied to the motor, a current sensor for detecting the driving current applied to the motor, and at least one processor, By at least one processor, With laundry stored in the drum above, Rotating the drum by the motor to perform dry agitation prior to supplying water to the tub, and detecting a dry agitation current value corresponding to the driving current detected by the current sensor during the dry agitation; After the above-mentioned drying stirring, water is supplied to the above-mentioned tub to perform the first water supply; Rotating the drum by the motor to perform the first wet stirring after the first wet stirring, and detecting the amount of change in water level measured by the water level sensor during the first wet stirring; Rotating the drum by the motor to perform a second wet stirring after the first wet stirring, and detecting a wet stirring current value corresponding to the driving current detected by the current sensor during the second wet stirring; A control method for a washing machine, comprising: identifying the quality of the laundry based on the dry current value, the water level change amount, and the wet current value.

12. In paragraph 11, The above washing machine, Further comprising a memory for storing a model learned to identify the quality of the laundry based on the dry current value, the water level change amount, and the wet current value, Identifying the quality of the above laundry is as follows: A control method for a washing machine further comprising inputting the dry current value, the water level change amount, and the wet current value into the learned model to identify the quality of the laundry.

13. In paragraph 11, By at least one processor, With laundry stored in the drum above, Based on the water level measured by the water level sensor after the first wet cloth stirring, it is determined whether to supply water to the tub so as to perform a second water supply after the first wet cloth stirring, Based on the decision to perform the second watering, water is supplied to the tub after the first wet stirring, Further comprising performing the second wet stirring after the second water supply, Identifying the quality of the above laundry is as follows: A control method for a washing machine, comprising identifying the quality of the laundry based on the difference between the dry current value, the water level change amount, the wet current value, and another wet current corresponding to the driving current detected by the current sensor during the first wet current stirring and the wet current value.

14. In paragraph 13, The above washing machine, Further comprising a memory for storing a model learned to identify the quality of the laundry based on the dry current value, the water level change amount, the wet current value, and the difference, Identifying the quality of the above laundry is as follows: A control method for a washing machine, comprising inputting the above dry current value, the amount of change in water level, the above wet current value, and the above difference.

15. In paragraph 13, By at least one processor, A control method for a washing machine further comprising determining the amount of water to be supplied to the second water supply based on the water level measured by the water level sensor after the first wet cloth agitation while laundry is stored in the drum.

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