CN114645419A - Washing system - Google Patents

Abstract

The invention provides a washing system capable of reducing the bias of washings in a rotary drum during dehydration. The washing system of the embodiment comprises a rotary drum, a first detection part, a determination part, a second detection part, a recording part and a control part. The rotary tub accommodates an object to be washed. The first detection unit detects at least one of a state of the rotary tub and a state of the stirring body. The determination unit determines whether or not the dewatering has failed based on a detection result of the first detection unit. The second detection part detects a washing state. The recording unit records information that associates the number of times the determining unit determines that the spin-drying has failed with the washing state detected by the second detecting unit when the determining unit determines that the spin-drying has failed. The control part controls the water flow in the rotary barrel based on the information recorded by the recording part and the washing state detected by the second detection part.

Description

Washing system

Technical Field

Embodiments of the present invention relate to washing systems.

Background

In a rotary tub of a washing machine, laundry may be biased during dehydration or the like. In a washing machine, it is desirable to reduce such a bias of laundry.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2014-008313

Patent document 2: japanese patent laid-open publication No. 2019-208858

Patent document 3: japanese patent laid-open publication No. 2011-177462

Disclosure of Invention

Problems to be solved by the invention

The invention provides a washing system, which can reduce the bias of washings in a rotary drum.

Means for solving the problems

The washing system of the embodiment comprises a rotary drum, a first detection part, a determination part, a second detection part, a recording part and a control part. The rotary tub accommodates an object to be washed. The first detection unit detects at least one of a state of the rotary tub and a state of the stirring body. The determination unit determines whether or not the dewatering has failed based on a detection result of the first detection unit. The second detection part detects a washing state. The recording unit records information that associates the number of times the determining unit determines that the spin-drying has failed with the washing state detected by the second detecting unit when the determining unit determines that the spin-drying has failed. The control part controls the water flow in the rotary barrel based on the information recorded by the recording part and the washing state detected by the second detection part.

Effects of the invention

According to the washing system of the invention, the bias of the washings in the rotary drum can be reduced during dehydration.

Drawings

Fig. 1 is a diagram showing an example of a configuration of a washing machine according to an embodiment.

Fig. 2 is a diagram showing an example of the configuration of a driving circuit according to an embodiment.

Fig. 3 is a diagram showing an example of the configuration of a control device according to an embodiment.

Fig. 4 is a diagram showing a part of the structure of the washing machine according to the embodiment.

Fig. 5 is a diagram showing an example of the information TBL1 according to the embodiment.

Fig. 6 is a diagram showing an example of a processing flow of the washing machine according to the embodiment.

Description of the reference numerals

1 … case, 2 … washing lid, 3 … tub, 4 … suspension rod, 5 … revolving tub, 6 … top cover, 7 … balance ring, 8 … stirring body, 9 … washing machine motor, 11 … clutch mechanism, 12 … drain valve, 13 … drain hose, 14 … switching motor, 16 … operation panel, 16a … display part, 16b … operation input part, 17 … vibration detection device, 18 … water supply valve, 19 … water level sensor, 20 … temperature acquisition device, 21 … rotation detection device, 22 … drive circuit, 22a … rectification circuit, 22b … ripple removal circuit, 22c … inverter, 23 … control device, 24 … inclination detection device, 100 … washing machine, 201 … reception part, 202 … detection part, 203 … determination part, 204 … recording part, 205 … control part, 206 … storage part.

Detailed Description

Hereinafter, a washing system according to an embodiment will be described with reference to the drawings. In the following description, the same reference numerals are given to components having the same or similar functions. Moreover, a repetitive description of these configurations may be omitted. "based on XX" means "based on at least XX", and may include cases based on other elements in addition to XX. The term "based on XX" is not limited to the case of using XX directly, and may include a case of using an element obtained by calculating and processing XX. "XX or YY" is not limited to one of XX and YY, and may include both XX and YY. This is also the case when the number of selection elements is three or more. "XX" and "YY" are arbitrary elements (for example, arbitrary information). The term "detection" is not limited to the case of directly sensing a physical quantity of a subject, and may include the case of directly or indirectly acquiring another physical quantity related to the physical quantity of the subject and estimating or specifying the physical quantity of the subject from the acquired other physical quantity. The term "acquisition" is not limited to the case of directly receiving the object itself, and may include the case of obtaining the object by performing calculation, processing, or the like on the directly received object.

Several embodiments will be described below. The washing machine of the embodiment is a washing machine for improving the bias of the washings generated in the dehydration. The washing machine is a vertical type washing machine. The washing machine may also be a double tub type washing machine.

< embodiment >

(integral constitution of washing machine)

Fig. 1 is a diagram showing an overall configuration of a washing machine 100 according to an embodiment. The washing machine 100 includes, for example, a casing 1, a tub 3 (an example of an outer tub), a suspension 4, a spin basket 5, a balance ring 7, a stirrer 8, a washing machine motor 9, a clutch mechanism 11, a drain valve 12, a drain hose 13, a switching motor 14, an operation panel 16, a vibration detection device 17 (an example of a first detection unit), a water supply valve 18, a water level sensor 19, a temperature acquisition device 20, a rotation detection device 21 (an example of a rotational position sensor), a drive circuit 22, a control device 23, and an inclination detection device 24. The washing machine 100 is an example of a washing system. The rotary tub 5 is an example of a washing tub.

The casing (outer box) 1 includes a bottom wall, an upper wall, a front wall, a rear wall, and left and right side walls. The housing 1 forms an external appearance of the washing machine 100. The washing lid 2 is openably and closably attached to the casing 1.

The tub 3 is disposed within the cabinet 1. The bottom of the tub 3 is closed. The upper surface of the tub 3 is formed in an open cylindrical container shape. A drain port 3a is provided at the bottom of the tub 3. The tub 3 is elastically supported by being suspended via a vibration-proof device configured mainly by suspension rods 4 and coil springs (not shown) provided at four corners inside the casing 1.

The rotary tub 5 serves as both a washing tub and a dehydrating tub. The tub 5 is disposed inside the tub 3. In the rotary tub 5, laundry (an example of laundry) is taken in and out through a laundry entrance and exit of a top cover 6 of the casing 1. The bottom of the rotary tub 5 is closed. The upper surface of the rotary tub 5 is formed in the shape of an open cylindrical container. The rotary tub 5 has a plurality of dewatering holes 5a in the peripheral wall thereof. Each dewatering hole 5a penetrates the peripheral wall portion of the rotary tub 5 in the thickness direction, and communicates the inside and outside of the rotary tub 5. A balance ring 7 is installed at an upper end of the rotary tub 5.

The stirring body 8 is rotatably provided at the bottom inside the rotary tub 5. The agitator 8 generates water flows in the rotary tub 5 during washing and rinsing. That is, the water flow in the rotary tub 5 can be changed by controlling the rotation of the stirring body 8.

The washing machine motor 9 is a motor for washing and dewatering. The washing machine motor 9 is provided below the tub 3. The washing machine motor 9 is rotated by a current supplied from the drive circuit 22 under the control of a control device 23 described later. The washing machine motor 9 rotates the rotary tub 5. The washing machine motor 9 is, for example, an outer rotor type three-phase DC brushless motor.

The clutch mechanism 11 is provided below the tub 3. The clutch mechanism 11 is driven by the washing machine motor 9. The clutch mechanism 11 switches between a state in which only the agitator 8 is rotated and a state in which the agitator 8 and the rotary tub 5 are rotated integrally.

The drain opening 3a is provided at the bottom of the tub 3. The drain hose 13 is connected to the drain port 3a via the drain valve 12. When the drain valve 12 is opened, the water in the tub 3 and the tub 5 is drained to the outside of the washing machine 100 through the drain hose 13.

The switching motor 14 is provided below the tub 3. The switching motor 14 switches the states of the clutch mechanism 11 and the water discharge valve 12 in conjunction with each other. For example, when the drain valve 12 is opened, the switching motor 14 switches the clutch mechanism 11 so that the agitator 8 and the tub 5 rotate integrally with each other by the washing machine motor 9. When the drain valve 12 is closed, the switching motor 14 switches the clutch mechanism 11 so that only the agitator 8 is independently rotated by the washing machine motor 9. The washing machine 100 may be provided with an electromagnetic solenoid instead of the switching motor 14, and the states of the clutch mechanism 11 and the drain valve 12 may be switched in conjunction with the electromagnetic solenoid.

An operation panel 16 is provided on the upper surface of the top cover 6. The operation panel 16 includes a display unit 16a and an operation input unit 16 b. For example, the display unit 16a and the operation input unit 16b are a panel including buttons and a display device that can be pressed by a user, a touch panel that can be operated by a user, or the like. The user can select an operation program for washing and perform an operation for starting the operation by operating the operation panel 16. Examples of the washing operation program include a standard program, a quick washing program, a fashion clothing program (a fine washing program), an indoor drying program, and a stubborn stain program. The amount of water injected into the rotary tub 5 during washing, the flow of water in the rotary tub 5 during rinsing, and the contents of the washing stroke are different for each washing operation program. Further, on the operation panel 16, a washing stroke, a remaining time until the end of the operation, a set water level, and the like are displayed. The operation panel 16 is an example of a report section.

The vibration detecting device 17 detects the vibration of the tub 3 (in other words, the vibration of the tub 5). The vibration detection device 17 is, for example, an acceleration sensor. In the case where the vibration detecting means 17 is an acceleration sensor, the vibration detecting means 17 is provided to the tub 3 (e.g., an outer surface of the tub 3). The acceleration sensor detects acceleration corresponding to vibration of the tub 3 (in other words, vibration of the tub 5). The acceleration detected by the acceleration sensor varies according to the vibration of the tub 3. Therefore, by determining the change in the acceleration detected by the acceleration sensor, the magnitude of the vibration of the tub 3 can be determined. As for the acceleration sensor, instead of being provided in the tub 3 to directly detect the vibration of the tub 3, the vibration of the tub 3 may be indirectly detected by other components (e.g., the boom 4, etc.) provided in the housing 1 or the housing 1. The acceleration sensor detects abnormal vibration caused by the offset when the laundry in the rotary tub 5 has the offset. That is, when the acceleration detected by the acceleration sensor exceeds the threshold value and it is determined that the abnormal vibration is detected, it is determined that the laundry has the offset. However, the vibration detection device 17 is not limited to the acceleration sensor. For example, the vibration detection device 17 may estimate a change in the rotation speed of the washing machine motor 9 from a change in a current flowing through the drive circuit 22, which will be described later, or a change in a current that rotates the washing machine motor 9, and may estimate vibration from the change in the rotation speed. In addition, the inference of the vibration is based on the following idea: in contrast, when there is no offset in the laundry in the tub 3, the rotation speed of the washing machine motor 9 is substantially constant, and when there is offset in the laundry in the tub 3 and the tub 3 vibrates, the rotation speed of the washing machine motor 9 fluctuates up and down.

The water supply valve 18 is connected to a water supply hose (not shown) of a faucet connected to a tap water pipe. When the water supply valve 18 is switched from the closed state to the open state, the tap water is supplied into the tub 5 through a water filling port (not shown) and further into the tub 3. The water level sensor 19 is provided in the tub 3. The water level sensor 19 detects the water level inside the tub 3.

The temperature obtaining device 20 obtains the ambient temperature of the washing machine 100. When the temperature acquisition device 20 is a temperature sensor, the temperature acquisition device 20 is provided on the outer surface of the casing 1. However, the temperature acquisition device 20 is not limited to a temperature sensor. For example, the temperature acquisition device 20 may acquire the air temperature indicated by the weather forecast of the area where the washing machine 100 is installed, for example, via a communication network.

The rotation detecting device 21 detects the rotation speed of the washing machine motor 9. The rotation detecting device 21 is, for example, a magnetic sensor (e.g., a hall element, a hall IC (Integrated Circuit)) or other position sensor. When the rotation detection device 21 is a magnetic sensor, the current rotor position is estimated from the outputs of the three magnetic sensors, and the rotation of the washing machine motor 9 is controlled based on the estimated rotor position. The rotation speed of the washing machine motor 9 during washing changes according to the quality of the laundry. That is, the quality of cloth can be determined by the rotation speed of the washing machine motor 9. The rotation detection device 21 may estimate the rotation speed of the washing machine motor 9 based on a value of a current flowing through a drive circuit 22, which will be described later, or a current rotating the washing machine motor 9.

The inclination detecting device 24 detects the inclination of the floor on which the washing machine 100 is placed (i.e., the inclination of the washing machine 100 itself with respect to the horizontal). The inclination detecting device 24 is, for example, a gyro sensor. The inclination detecting device 24 is provided on the inner side of the bottom wall of the housing 1, for example.

(constitution of drive Circuit)

The drive circuit 22 supplies the washing machine motor 9 with a current corresponding to the control by the control device 23. Fig. 2 is a diagram showing an example of the configuration of the drive circuit 22. The drive circuit 22 is, for example, a circuit shown in fig. 2. The drive circuit 22 includes an inductor (inductor) L, a rectifier circuit 22a, a ripple (ripple) removal circuit 22b, an inverter 22c, and a current detection circuit Rs.

The inductor L limits the current. The rectifier circuit 22a generates a dc voltage from the commercial ac voltage. The rectifier circuit 22a is a bridge circuit composed of four diodes, for example. The ripple removing circuit 22b reduces the ripple in the rectified dc voltage. The ripple removing circuit 22b is, for example, a capacitor. The ripple removing circuit 22b reduces the amplitude variation of the voltage output from the rectifying circuit 22 a. The voltage output from the rectifier circuit 22a is input to the inverter 22 c.

The inverter 22c generates an ac voltage for driving the washing machine motor 9 from the input dc voltage. For example, as shown in fig. 2, the inverter 22c is a bridge circuit including six switching elements. In the bridge circuit, 3 pairs of switching elements are provided, with the switching element on the power supply side and the switching element on the ground side being paired. Examples of the switching element include a Semiconductor element such as an IGBT (Insulated Gate Bipolar Transistor) or a MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor).

The resistor circuit Rs includes three shunt resistors. Each shunt resistor is provided on a path through which a current flows corresponding to each of the three phases of the washing machine motor 9. The shunt resistors are used to detect the current flowing through these paths. The voltage across each shunt resistor is divided by the resistance value of the shunt resistor, thereby determining the currents flowing through the three phases. When the switching element is an IGBT, each shunt resistor of the resistor circuit Rs is provided between the emitter terminal and the ground terminal of the IGBT on the ground side. While the IGBT on the ground side is in the on state, a current having the same magnitude as a current flowing through the winding of the washing machine motor 9 is generated. Therefore, a positive voltage and a negative voltage are generated in each shunt resistor.

(constitution of control device)

Fig. 3 is a block diagram showing the configuration of the control device 23. Fig. 4 is a diagram showing a part of the structure of the washing machine 100. The control device 23 includes, for example, a reception unit 201, a detection unit 202 (an example of a first detection unit and an example of a second detection unit), a determination unit 203, a recording unit 204, a control unit 205, and a storage unit 206. The control device 23 is a device as follows: the drain valve 12, the switching motor 14, and the water supply valve 18 are controlled based on information received from the operation panel 16, the vibration detection device 17, the water level sensor 19, the temperature acquisition device 20, the rotation detection device 21, the drive circuit 22, and the inclination detection device 24, and the washing machine motor 9 is controlled by controlling the drive circuit 22 (see fig. 4).

These functional units are realized by executing a program (software) by a hardware processor such as a CPU (Central Processing Unit) mounted on the control device 23. However, a part or all of the functional units may be realized by hardware (including a Circuit unit) such as an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), an FPGA (Field Programmable Gate Array), or the like, or may be realized by cooperation of software and hardware.

The reception unit 201 generates a signal corresponding to an operation performed by the user on the operation panel 16. Specifically, the signal generated by the reception unit 201 is a signal indicating a washing operation program selected by the user. The signal generated by the reception unit 201 is a signal indicating the material of the floor on which the washing machine 100 is placed.

The detection unit 202 detects at least one of the state of the rotary tub 5 and the state of the stirring body 8. Specifically, the detection part 202 determines an acceleration detected by an acceleration sensor provided outside the tub 3 (e.g., an outer surface of the tub 3) as a state of the spin basket 5. Further, the detection unit 202 estimates a change in the rotation speed of the washing machine motor 9 (i.e., the state of the agitator) based on a change in the value of the current flowing through the resistance circuit Rs of the drive circuit 22.

Further, the detection unit 202 detects the washing state. Examples of the washing state include an operation program of washing, a weight of laundry, a cloth quality of laundry, an ambient temperature of the washing machine 100, an inclination of a floor on which the washing machine 100 is placed, a material of the floor on which the washing machine 100 is placed, and the like.

For example, the detection unit 202 detects the washing operation program by specifying the operation program indicated by the signal generated by the reception unit 201. In a first detection operation described later, the detection unit 202 detects the weight of the laundry based on at least one of a current value flowing through a shunt resistor of the resistor circuit Rs obtained during acceleration of the rotational driving of the rotary tub 5 and a change in the rotational speed of the washing machine motor 9. This detection can be performed because the value of the current flowing through the shunt resistor of the resistor circuit Rs obtained at the time of acceleration of the rotational driving of the rotary tub 5 and the change in the rotation speed of the washing machine motor 9 have a correlation with the weight of the laundry. The detector 202 detects the quality of the laundry based on at least one of a change in the current value flowing through the shunt resistor of the resistor circuit Rs and a difference between the water supply amount and the water level (i.e., the water amount) indicated by the water level sensor 19. For example, the detection unit 202 determines that the cloth is a cloth that easily absorbs moisture when the change in the current value flowing through the shunt resistor of the resistor circuit Rs is large, and determines that the cloth is a cloth that hardly absorbs moisture when the current value is small. Further, when the difference between the amount of supplied water and the water level indicated by the water level sensor 19 is greater than the threshold value, the detection unit 202 determines that the cloth is a cloth that easily absorbs water, and when the difference is less than the threshold value, the cloth is a cloth that hardly absorbs water. Further, detection unit 202 detects the ambient temperature of washing machine 100 by specifying the temperature acquired by temperature acquisition device 20. Further, the detector 202 detects the inclination of the floor on which the washing machine 100 is placed by specifying the inclination detected by the inclination detector 24. Further, the detection unit 202 detects the material of the floor on which the washing machine 100 is placed by identifying the material of the floor indicated by the signal generated by the reception unit 201.

The determination unit 203 determines whether or not the dewatering has failed based on the detection result of the detection unit 202. For example, when determining that the vibration indicated by the acceleration sensor detected by the detection unit 202 exceeds the threshold value, the determination unit 203 determines that the laundry is biased, that is, the spin-drying has failed. When determining that the change in the rotation speed of the washing machine motor 9 detected by the detection unit 202 exceeds the threshold value, the determination unit 203 determines that the laundry is biased, that is, the spin-drying has failed.

The recording unit 204 records, in the storage unit 206, information TBL1 that relates the number of times the determination unit 203 determines that the spin-drying has failed to the washing state detected by the detection unit 202 when the determination unit 203 determines that the spin-drying has failed. Fig. 5 is a diagram showing an example of the information TBL1 recorded in the storage unit 206 by the recording unit 204. For example, as shown in fig. 5, in the case of washing #1, the recording unit 204 records in the storage unit 206 a washing status 1, the number of times of dehydration failure 3, the control parameters (parameters 1 to 3) used when dehydration failed, and the control parameter (parameter 4) used at the end of successful dehydration in association with each other, where the washing status 1 is represented by an operation program 1, the weight of the laundry is 1, the cloth quality of the laundry is 1, the ambient temperature of the washing machine 100 is 1, the inclination of the floor on which the washing machine 100 is placed is 1, and the material of the floor on which the washing machine 100 is placed is 1. The first-time-use control parameters ( parameters 1, 5, and 8 in fig. 5) are control parameters of a standard predetermined for each washing state.

The control unit 205 performs a first detection operation for detecting the weight of the laundry stored in the rotary tub 5. For example, before washing or drying is started (for example, before water is supplied into washing machine 100, for example, immediately after an operation start button of washing machine 100 is pressed), control unit 205 performs a first detection operation. The first detection operation is an operation of rotationally driving the rotary tub 5 at a relatively large acceleration and a relatively large deceleration, and does not include constant-speed rotation.

When the spin-drying operation has not failed, the control unit 205 controls the drain valve 12, the switching motor 14, and the water supply valve 18 based on the control parameters for the standard of the washing state, and controls the drive circuit 22 to control the washing machine motor 9. Accordingly, control unit 205 executes the washing operation of washing machine 100 including the washing stroke, the rinsing stroke, and the spin-drying stroke corresponding to the washing operation program designated by the user.

When the determination unit 203 determines that the spin-drying operation has failed, the control unit 205 controls the water flow in the rotary tub 5 based on the information TBL1 recorded in the storage unit 206 by the recording unit 204 and the washing state detected by the detection unit 202. For example, when the washing state detected by detection unit 202 is washing state 1 shown in fig. 5, and determination unit 203 determines that dehydration has failed, control unit 205 returns to the process of supplying water, changes the control parameter from parameter 1 to parameter 2, and performs the process of supplying water and rinsing again. The parameter 2 is a parameter for controlling the water flow in the tub in a manner of improving the offset of the laundry compared to the parameter 1. When the rinsing is finished, the determination unit 203 determines whether or not the dehydration has failed. When the determination unit 203 determines that the dehydration has failed, the process returns to the water supply process, changes the control parameter from the parameter 2 to the parameter 3, and performs the water supply and rinsing processes again. The parameter 3 is a parameter for controlling the water flow in the tub in a manner of improving the offset of the laundry compared to the parameter 2. Such changes in control parameters and determination of whether or not the dewatering has failed continue until the dewatering is determined to have succeeded.

In addition, the control parameter is a parameter for controlling the water flow in the rotary tub in a manner of improving the bias of the laundry. The controller 205 increases the degree of change of the water flow in the rotary tub 5 as the number of times of failure of the spin-drying process increases. As specific examples of controlling the water flow in the rotary tub 5 so as to improve the bias of the laundry, three are listed below. First, the control unit 205 increases the degree of change from the reference value of the water flow (i.e., the state of the water flow when the standard control parameter is used) by extending the rotation time of the washing machine motor 9 that rotates the agitator 8 that changes the water flow in the tub 5. This is based on the following idea: since the rotation time of the washing machine motor 9 is extended, friction of the pulsator 8 with the laundry is generated in correspondence to the extended amount, so that the laundry is loosened to improve the bias of the laundry. Secondly, the control unit 205 increases the degree of change of the water flow by shortening the time from the normal rotation to the reverse rotation and the time from the reverse rotation to the normal rotation in the rotation of the washing machine motor 9 for rotating the agitator 8 for changing the water flow in the tub 5. This is based on the following idea: since the number of times of switching the rotation direction of the washing machine motor 9 per unit time is increased, friction between the pulsator 8 and the laundry is generated in accordance with the increased amount, so that the laundry is loosened to improve the bias of the laundry. Thirdly, control unit 205 increases the degree of change of the water flow by increasing the rotation speed per unit time of washing machine motor 9 that rotates agitator 8 that changes the water flow in tub 5. This is based on the following idea: since the rotation speed of the washing machine motor 9 per unit time is increased, friction of the pulsator 8 with the laundry is generated in accordance with the increased amount, so that the laundry is loosened to improve the bias of the laundry.

The storage unit 206 stores various information necessary for processing performed by the control device 23. For example, the storage unit 206 stores control parameters used for each washing state represented by a combination of an operation program for washing, a weight of laundry, a cloth quality of laundry, an ambient temperature of the washing machine 100, an inclination of a floor on which the washing machine 100 is placed, a material of the floor on which the washing machine 100 is placed, and the like.

(treatment by washing machine)

Next, a process performed by the washing machine 100 according to an embodiment will be described. Fig. 6 is a diagram showing an example of a processing flow of the washing machine 100 according to the embodiment. Here, a process flow of the washing machine 100 shown in fig. 6 will be described.

The user operates the operation panel 16 to determine an operation program for washing. Further, the user performs an operation of determining the material of the floor on which the washing machine 100 is placed on the operation panel 16. The timing and sequence of the operation of determining the washing operation program and the operation of determining the material of the floor may be arbitrary.

The reception unit 201 generates a signal corresponding to an operation performed by the user on the operation panel 16 (step S1). Specifically, the reception unit 201 generates a signal indicating the washing operation program selected by the user and a signal indicating the material of the floor on which the washing machine 100 is placed.

Detection unit 202 determines the temperature acquired by temperature acquisition device 20 to detect the ambient temperature of washing machine 100 (step S2). Further, the detector 202 determines the inclination detected by the inclination detector 24 to detect the inclination of the floor on which the washing machine 100 is placed (step S3).

The control unit 205 performs a first detection operation for detecting the weight of the laundry stored in the rotary tub 5 based on the signal generated by the reception unit 201 (step S4). The first detection operation is an operation of rotationally driving the rotary tub 5 at a relatively large acceleration and a relatively large deceleration, and is an operation not including constant-speed rotation. When the control unit 205 performs this operation, the detection unit 202 detects the weight of the laundry in the first detection operation (step S5). This detection may be performed based on at least one of a value of a current flowing through a shunt resistor of the resistor circuit Rs obtained during acceleration of the rotational driving of the rotary tub 5 or a change in the rotational speed of the washing machine motor 9.

The control unit 205 controls the water supply valve 18 to supply water to the rotary tub 5. Then, the control unit 205 controls the washing machine motor 9 to rotate the washing machine motor 9. At this time, the detection unit 202 detects the cloth quality of the laundry based on the change in the current value flowing through the shunt resistor of the resistor circuit Rs (step S7). In this case, when the detected cloth quality is different from the cloth quality assumed when the standard control parameter is determined, the cloth quality is changed to the parameter when the standard control parameter is detected. Further, when water is supplied, detector 202 may detect the quality of laundry based on the difference between the amount of supplied water and the water level (i.e., the amount of water) indicated by water level sensor 19.

The control unit 205 controls the drain valve 12, the switching motor 14, and the water supply valve 18 so as to perform a washing stroke corresponding to the washing operation program indicated by the signal generated by the reception unit 201, and controls the drive circuit 22 to control the washing machine motor 9 (step S6). In this washing stroke, an amount of water corresponding to the weight of the laundry detected in the process of step S3 is stored in the tub 3 using standard control parameters. In addition, the mixer 8 is rotated in the normal and reverse directions together with the detergent to perform a washing stroke (i.e., a washing operation).

Then, the control unit 205 ends the washing stroke (step S8). The control portion 205 controls the drain valve 12 to drain the water in the tub 3 to the outside. Then, the control unit 205 controls the water supply valve 18 to supply water into the tub 3, controls the washing machine motor 9 to rotate the tub 5, and controls the drain valve 12 to discharge the water in the tub 3 to the outside, thereby performing a rinsing stroke (i.e., performing a rinsing operation) (step S9).

When the water in the tub 3 is empty, the control part 205 switches the clutch mechanism 11, and starts the spin-drying stroke (i.e., starts the spin-drying operation) using the standard control parameters (step S10). The detector 202 detects at least one of the state of the rotary tub 5 and the state of the stirring body 8 (step S11). For example, the detection part 202 determines an acceleration detected by an acceleration sensor provided outside the tub 3 (e.g., an outer surface of the tub 3) as a state of the tub 5. Further, the detection unit 202 may estimate a change in the rotation speed of the washing machine motor 9 (that is, the state of the agitator) from a change in the value of the current flowing through the resistance circuit Rs of the drive circuit 22.

The determination unit 203 determines whether or not the dehydration has failed based on the detection result of the detection unit 202 (step S12). For example, when determining that the vibration indicated by the acceleration sensor detected by the detection unit 202 exceeds the threshold value, the determination unit 203 determines that the laundry is biased, that is, the spin-drying has failed. Further, the determination unit 203 may determine that the laundry is biased, that is, the spin-drying has failed, when determining that the change in the rotation speed of the washing machine motor 9 detected by the detection unit 202 exceeds the threshold value.

If the determination unit 203 determines that the dehydration has not failed (no in step S12), the control unit 205 ends the dehydration stroke. Then, the control unit 205 controls the drain valve 12, the switching motor 14, and the water supply valve 18 so as to perform the next stroke of the dehydration using the control parameters used at this stage, and controls the washing machine motor 9 by controlling the drive circuit 22 (step S13).

When the determination unit 203 determines that the spin-drying has failed (yes in step S12), the recording unit 204 records, in the storage unit 206, information TBL1 that relates the number of times the determination unit 203 determines that the spin-drying has failed to the washing state detected by the detection unit 202 when the determination unit 203 determines that the spin-drying has failed (step S14). Controller 205 controls the flow of water in rotary tub 5 based on information TBL1 recorded in storage 206 by recorder 204 and the washing state detected by detector 202 (step S15). For example, when the washing state detected by detection unit 202 is washing state 1 shown in fig. 5, and determination unit 203 determines that dehydration has failed, control unit 205 returns to the process of supplying water, changes the control parameter from parameter 1 to parameter 2, and performs the process of supplying water and rinsing again. The parameter 2 is a parameter for controlling the water flow in the tub in a manner of improving the offset of the laundry compared to the parameter 1. When the rinsing is finished, the determination unit 203 determines whether or not the dehydration has failed. When the determination unit 203 determines that the dehydration has failed, the process returns to the water supply process, changes the control parameter from the parameter 2 to the parameter 3, and performs the water supply and rinsing processes again. The parameter 3 is a parameter for controlling the water flow in the tub in a manner of improving the offset of the laundry compared to the parameter 2. Such changes in control parameters and determination of whether or not the dewatering has failed continue until the dewatering is determined to have succeeded.

The timing at which the process of step S14 is executed is when the operation program executed by washing machine 100 is the operation program that was first selected. In the case where a certain operation program that has been executed in the past by the washing machine 100 is executed again, since it is already known that there is a possibility that the process of performing the dehydration is repeated a plurality of times, the timing of executing the process of step S14 described above is performed between step S8 and step S9, so that the process of performing the dehydration can be prevented from being repeated.

(advantages)

The washing machine 100 according to the embodiment is explained above. In washing machine 100, detection unit 202 detects at least one of the state of rotary tub 5 and the state of agitator 8. The determination unit 203 determines whether or not the dewatering has failed based on the detection result of the detection unit 202. The detection unit 202 detects a washing state. The recording unit 204 records information in which the number of times the determining unit 203 determines that the spin-drying has failed and the washing state detected by the detecting unit 202 when the determining unit 203 determines that the spin-drying has failed are related to each other. The control unit 205 controls the water flow in the rotary tub 5 based on the information recorded in the recording unit 204 and the washing state detected by the detection unit 202. The washing machine 100 can reduce the offset of the laundry in the rotary tub during the spin-drying.

In addition, in the washing machine 100, the vibration detection device 17 is an acceleration sensor. The washing machine 100 can reduce the offset of the laundry in the rotary tub during the spin-drying.

In washing machine 100, recording unit 204 records, in storage unit 206, information TBL1 that relates the number of times determination unit 203 determines that spin-drying has failed to the washing state detected by detection unit 202 when determination unit 203 determines that spin-drying has failed. The washing machine 100 can recognize the pattern of the spin-drying failure and cope with the improvement of the offset of the laundry in the next spin-drying process.

In washing machine 100, when determining that the vibration indicated by the acceleration sensor detected by detecting unit 202 exceeds the threshold value, determining unit 203 determines that the laundry is biased, that is, the spin-drying operation has failed. With this washing machine 100, a new water flow can be generated when the number of times of spin-drying failure exceeds a threshold value, and the laundry bias can be further improved.

In washing machine 100, control unit 205 increases the degree of change of the water flow in tub 5 as the number of times of spin-drying failure increases. With this washing machine 100, as the number of times of spin-drying failure increases, the correction force of the water flow in the rotary tub 5 to the offset of the laundry increases, and the offset can be further improved.

In washing machine 100, control unit 205 extends the rotation time of washing machine motor 9 for rotating agitator 8 for changing the water flow in tub 5. With the washing machine 100, the correction force for the laundry bias is increased, and the laundry bias can be further improved.

In washing machine 100, control unit 205 shortens the time from the normal rotation to the reverse rotation and the time from the reverse rotation to the normal rotation in the rotation of washing machine motor 9 that rotates agitator 8 that changes the water flow in tub 5, thereby increasing the degree of change in the water flow. With the washing machine 100, the correction force for the laundry bias is increased, and the laundry bias can be further improved.

In washing machine 100, control unit 205 increases the degree of change of the water flow by increasing the rotation speed per unit time of washing machine motor 9 that rotates agitator 8 that changes the water flow in tub 5. With the washing machine 100, the correction force for the laundry bias is increased, and the laundry bias can be further improved.

In addition, in the washing machine 100, when the ambient temperature is high, the damper is softened, and the degree of suppression of the vibration of the rotary tub 5 by the damper is reduced. Control unit 205 performs a change of the water flow by using a control parameter in which a larger vibration is assumed, taking into account the ambient temperature of washing machine 100. This increases the correction force for the laundry bias by the washing machine 100, and improves the laundry bias.

< first modification of embodiment >

In the washing machine 100 of the above-described embodiment, the case where the process of returning to the water supply is performed when the spin-drying has failed and the water flow is changed at the next spin-drying time is described. However, in the washing machine 100 according to the first modification of the embodiment, the control unit 205 may use a control parameter of the water flow that reduces the offset of the laundry when the spin-drying is performed in the washing process. The washing machine 100 reduces the return of the process and can efficiently improve the bias of the laundry.

< second modification of embodiment >

In the washing machine 100 of the above-described embodiment, the case where the process of returning to the water supply is performed when the spin-drying has failed and the water flow is changed at the next spin-drying time is described. However, in the washing machine 100 according to the second modification of the embodiment, the control unit 205 may use the control parameter in which the offset of the laundry is improved in the past in the first dehydration process for the new laundry. Specifically, a determination unit is provided for determining the content of at least one washing state (i.e., the combination of the operation program of washing, the weight of the laundry, the cloth quality of the laundry, the ambient temperature of washing machine 100, the inclination of the floor on which washing machine 100 is placed, the material of the floor on which washing machine 100 is placed, and the like) in the information TBL1 recorded in recording unit 204. Then, the control unit 205 may control the water flow in the rotary tub 5 based on the content determined by the determination unit. With the washing machine 100, it is possible to apply control parameters that are less likely to cause a laundry bias from the first time of the washing process in the same washing state. Therefore, the return of the treatment is reduced, and the bias of the laundry can be improved efficiently.

< third modification of embodiment >

In the washing machine 100 of the above-described embodiment, the case where the water flow in the rotary tub 5 is changed according to the increase in the number of times of failure of spin-drying is explained. However, in the washing machine 100 according to the third modification of the embodiment, instead of increasing the number of times of failure of spin-drying, an increase in the probability of failure of spin-drying may be used. With this washing machine 100, the water flow can be changed with an increase in the probability of spin-drying failure, as with the change in water flow according to an increase in the number of spin-drying failures, and the laundry bias can be improved. Probability is an example of a ratio.

Several embodiments of the present invention have been described, but these embodiments are provided as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in other various manners, and various omissions, substitutions, and changes can be made without departing from the spirit of the invention. These embodiments and modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalent scope thereof.

Claims (14)

1. A washing system is provided with:

a rotary tub for accommodating the object to be washed;

a first detection unit that detects at least one of a state of the rotary drum and a state of the stirring body;

a determination unit that determines whether or not dewatering has failed based on a detection result of the first detection unit;

a second detection part for detecting the washing state;

a recording unit configured to record information that associates the number of times the determining unit determines that the spin-drying has failed with the washing state detected by the second detecting unit when the determining unit determines that the spin-drying has failed; and

and a control part for controlling the water flow in the rotary tub based on the information recorded by the recording part and the washing state detected by the second detection part.

2. The washing system of claim 1,

the first detection unit includes an acceleration sensor provided in an outer tub that rotatably supports the rotary tub and accommodates the rotary tub therein.

3. The washing system of claim 2,

the determination unit determines that the spin-drying has failed when it is determined that the vibration indicated by the acceleration sensor exceeds a threshold value.

4. The washing system of any of claims 1-3,

the first detection unit includes a rotational position sensor that detects the rotational speed of a motor that rotates an agitator that changes the water flow.

5. The washing system of claim 4,

the determination unit determines that the spin-drying has failed when it is determined that the change in the rotation speed of the motor detected by the rotational position sensor exceeds a threshold value.

6. The washing system of any of claims 1-5,

the control unit controls the water flow when it is determined that the number of times the spin-drying has failed is a predetermined number of times or when it is determined that the number of times the spin-drying has failed is equal to or more than a predetermined ratio to the number of times the washing has been performed.

7. The washing system of claim 6,

the control unit increases the degree of change of the water flow from a reference value as the number of times of determining that the dewatering has failed increases or as the ratio increases.

8. The washing system of claim 7,

the control unit increases the degree of change of the water flow from a reference value by increasing the rotation time of a motor that rotates an agitator that changes the water flow.

9. The washing system of claim 7 or 8,

the control unit increases the degree of change of the water flow by shortening the time from the normal rotation to the reverse rotation and the time from the reverse rotation to the normal rotation in the rotation of the motor that rotates the stirring body that changes the water flow.

10. The washing system of any of claims 7 to 9,

the control unit increases the degree of change of the water flow by increasing the number of revolutions per unit time of a motor that rotates an agitator that changes the water flow.

11. The washing system of any of claims 1-10,

the control part controls the water flow in the rotary barrel during the washing action in the washing process.

12. The washing system of any of claims 1-11,

the washing state includes at least one of an operation mode of washing, a weight of the object, a cloth quality of the object, an inclination of a floor on which the washing system is placed, or a material of the floor on which the washing system is placed.

13. The washing system of any of claims 1-12,

the wash conditions include the ambient temperature of the present washing system.

14. The washing system of any of claims 1-13,

the washing system includes a determination unit that determines the content of at least one washing state in the information recorded by the recording unit,

the control unit controls the water flow based on the content determined by the determination unit.

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