WO2020011225A1 - 洗衣机 - Google Patents

洗衣机 Download PDF

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Publication number
WO2020011225A1
WO2020011225A1 PCT/CN2019/095561 CN2019095561W WO2020011225A1 WO 2020011225 A1 WO2020011225 A1 WO 2020011225A1 CN 2019095561 W CN2019095561 W CN 2019095561W WO 2020011225 A1 WO2020011225 A1 WO 2020011225A1
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WO
WIPO (PCT)
Prior art keywords
drum
output
rotation speed
motor
acceleration
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2019/095561
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English (en)
French (fr)
Inventor
川口智也
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qingdao Haier Washing Machine Co Ltd
Aqua Co Ltd
Original Assignee
Qingdao Haier Washing Machine Co Ltd
Aqua Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qingdao Haier Washing Machine Co Ltd, Aqua Co Ltd filed Critical Qingdao Haier Washing Machine Co Ltd
Priority to CN201980044777.9A priority Critical patent/CN112368438B/zh
Publication of WO2020011225A1 publication Critical patent/WO2020011225A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F33/00—Control of operations performed in washing machines or washer-dryers 
    • D06F33/30—Control of washing machines characterised by the purpose or target of the control 

Definitions

  • the present invention relates to a washing machine that performs, for example, a washing process, a rinsing process, and a dehydration process.
  • Patent Document 1 describes a washing machine in which a drum for accommodating laundry is arranged inside an outer tub.
  • a water hole is formed in a peripheral wall of the drum, and water removed from the laundry in the drum is discharged to the outer tube through the water hole, and water in the outer tube is discharged through a drain port.
  • a motor for rotationally driving the drum is provided below the outer cylinder.
  • the dehydration process of the washing machine has the following problems: When the drum is unbalanced due to the attachment method of the laundry to the inner side wall of the drum, if the offset of the laundry is large, the eccentricity of the drum during rotation becomes large, and the rotation The required torque is too large to start the dehydration operation.
  • Patent Document 1 describes a washing machine which focuses on “the fluctuation of the motor current is caused by the fluctuation of the load torque, and the motor current is generated when the load torque reaches the maximum during one rotation period of the drum.
  • peak value a torque change is detected by a torque current of an inverter circuit constituting a motor control circuit, and an offset, that is, an unbalance amount, of the laundry is detected based on the torque change.
  • a balance adjustment operation is performed to eliminate the offset of the laundry.
  • the water contained in the laundry is discharged to the outside through the drainage path of the washing machine.
  • the structure of the drainage path is not good, sometimes Water remains between the drum and the outer cylinder, and this water acts as an obstacle and prevents the drum from rotating.
  • an abnormal sound may be generated, and the abnormal noise increases as the rotation speed of the drum increases.
  • a washing machine having an acceleration sensor that detects the acceleration of the drum, and detects an offset, that is, an unbalance amount, of the laundry based on the acceleration detected by the acceleration sensor.
  • the acceleration sensor is a sensor that detects vibration (acceleration) of the drum.
  • vibration acceleration
  • the amount of vibration of the drum is small. Therefore, it is impossible to detect a state where water remains between the drum and the outer cylinder based on the acceleration of the drum detected by the acceleration sensor.
  • the inventor of the present invention has studied a method for detecting a state where water remains between the drum and the outer cylinder, and found that the load of the motor that rotates the drum and the acceleration of the drum detected by the acceleration sensor can be used. Both parties detected the state of water remaining between the drum and the outer cylinder.
  • Patent Document 1 Japanese Unexamined Patent Publication No. 9-290089
  • An object of the present invention is to provide a washing machine that can take appropriate countermeasures by detecting a state where water remains between a drum and an outer drum.
  • the washing machine includes a bottomed cylindrical drum provided to be rotatable about an axis, a motor for rotationally driving the drum via a drive shaft protruding from the bottom of the drum, an acceleration sensor, Detecting the acceleration of the drum; a judging unit, after the rotation speed of the drum reaches a predetermined speed or higher in a dehydration process, a first output difference obtained by subtracting an output of the motor from the output of the acceleration sensor is smaller than a first threshold A case, or a second output difference obtained by subtracting the output of the acceleration sensor from the output of the motor being greater than a first threshold, determining that the rotation speed of the drum cannot be increased; and a control unit, according to the determining unit The decision made controls the motor.
  • the washing machine of the present invention is characterized in that, after determining that the rotation speed of the drum cannot be increased, when the first output difference is greater than a second threshold, or when the second output difference is smaller than a second threshold, the determining The unit determines that the rotation speed of the drum can be increased.
  • the washing machine of the present invention is characterized in that, for the first output difference, the second threshold value is larger than the first threshold value, or for the second output difference, the second threshold value is smaller than the first threshold value.
  • the washing machine includes a bottomed cylindrical drum provided to be rotatable around an axis; a motor that rotationally drives the drum via a drive shaft protruding from the bottom of the drum; an acceleration sensor that detects The acceleration of the drum; a judging unit, after the rotation speed of the drum reaches a predetermined speed or higher in the dehydration process, when the first output ratio obtained by dividing the output of the acceleration sensor by the output of the motor is less than a first threshold, Or when the second output ratio obtained by dividing the output of the motor by the output of the acceleration sensor is greater than or equal to the first threshold, determining that the rotation speed of the drum cannot be increased; and a control unit, according to the determination unit, It is determined to control the motor.
  • the washing machine of the present invention is characterized in that, after determining that the rotation speed of the drum cannot be increased, when the first output ratio is greater than a second threshold, or when the second output ratio is smaller than a second threshold, the determining The unit determines that the rotation speed of the drum can be increased.
  • the washing machine of the present invention is characterized in that, for the first output ratio, the second threshold value is larger than the first threshold value, or for the second output ratio, the second threshold value is smaller than the first threshold value.
  • the washing machine includes a bottomed cylindrical drum provided to be rotatable around an axis; a motor that rotationally drives the drum via a drive shaft protruding from the bottom of the drum; an acceleration sensor that detects The acceleration of the drum; a judging unit, after the rotation speed of the drum reaches a predetermined speed or higher in the dehydration process, if the output of the motor is above the motor threshold and the output of the acceleration sensor is less than the acceleration threshold, it is determined as impossible Increasing the rotation speed of the drum; and a control unit that controls the motor according to a determination made by the determination unit.
  • the washing machine of the present invention is characterized in that, after determining that the rotation speed of the drum cannot be increased, in a state where the output of the acceleration sensor is less than an acceleration threshold, when the output of the motor is less than the motor threshold, the determining unit determines In order to increase the rotation speed of the drum.
  • the washing machine of the present invention is characterized in that, when the output of the acceleration sensor is equal to or greater than an acceleration threshold, the determination unit determines that the rotation speed of the drum cannot be increased or the rotation of the drum cannot be stopped.
  • the washing machine according to the present invention is characterized in that, when it is determined by the determination unit that the rotation speed of the drum cannot be increased, the control unit controls the motor so that the rotation speed of the drum is maintained for a predetermined time.
  • the washing machine of the present invention is characterized in that, when the output of the acceleration sensor does not change when the rotation speed of the drum increases, the determination unit determines that the rotation speed of the drum cannot be increased.
  • the washing machine of the present invention is configured such that the first output difference obtained by subtracting the output of the motor from the output of the acceleration sensor is smaller than the first threshold, or the second output difference obtained by subtracting the output of the acceleration sensor from the output of the motor is greater than the first threshold In one case, it is detected that water is left between the drum and the outer cylinder, and the rotation speed of the drum is not increased. Therefore, it is possible to prevent an abnormal sound from being generated due to an increase in the rotation speed of the drum in a state where water remains between the drum and the outer drum during the dehydration process.
  • the washing machine of the present invention is configured such that the first output difference obtained by subtracting the output of the motor from the output of the acceleration sensor is greater than the second threshold, or the second output difference obtained by subtracting the output of the acceleration sensor from the output of the motor is smaller than the second threshold In one case, it is detected that the state of water remaining between the drum and the outer cylinder has been eliminated, and the rotation speed of the drum is increased. Therefore, when the state of water remaining between the drum and the outer cylinder has been eliminated during the dehydration process, the rotation speed of the drum can be increased to accelerate the dehydration.
  • the second threshold value for detecting that the state of water remaining between the drum and the outer tube has been eliminated is different from the first threshold value for detecting that the state of water remaining between the drum and the outer tube, Therefore, when the state of water remaining between the drum and the outer cylinder in the dehydration process has been eliminated, the rotation speed of the drum can be increased to accelerate dehydration.
  • the washing machine of the present invention is configured such that the first output ratio obtained by dividing the output of the acceleration sensor by the output of the motor is smaller than the first threshold, or the second output ratio obtained by dividing the output of the motor by the output of the acceleration sensor is greater than the first threshold In one case, it is detected that water is left between the drum and the outer cylinder, and the rotation speed of the drum is not increased. Therefore, it is possible to prevent an abnormal sound from being generated when the rotation speed of the drum is increased while water remains between the drum and the outer drum during the dehydration process.
  • the washing machine of the present invention is configured such that: the first output ratio obtained by dividing the output of the acceleration sensor by the output of the motor is greater than the second threshold, or the second output ratio obtained by dividing the output of the motor by the output of the acceleration sensor is smaller than the second threshold In one case, it is detected that the state of water remaining between the drum and the outer cylinder has been eliminated, and the rotation speed of the drum is increased. Therefore, when the state where water remains between the drum and the outer cylinder in the dehydration process has been eliminated, the rotation speed of the drum can be increased to accelerate dehydration.
  • the second threshold value for detecting that the state of water remaining between the drum and the outer tube has been eliminated is different from the first threshold value for detecting that the state of water remaining between the drum and the outer tube, Therefore, when the state of water remaining between the drum and the outer cylinder in the dehydration process has been eliminated, the rotation speed of the drum can be increased to accelerate dehydration.
  • the washing machine according to the present invention is configured to detect that a state where water remains between the drum and the outer drum does not increase the rotation speed of the drum according to a case where the output of the motor is above the motor threshold and the output of the acceleration sensor is less than the acceleration threshold. Therefore, it is possible to prevent the abnormal sound from being caused by rotating the drum in a state where water remains between the drum and the outer drum during the dehydration process.
  • the washing machine of the present invention based on the fact that the output of the motor is less than the motor threshold in a state where the output of the acceleration sensor is less than the acceleration threshold, it is detected that the state of water remaining between the drum and the outer drum has been eliminated, thereby increasing the rotation speed of the drum. Therefore, when the state where water remains between the drum and the outer cylinder in the dehydration process has been eliminated, the rotation speed of the drum can be increased to accelerate dehydration.
  • the washing machine of the present invention is configured to detect that the bias of the laundry is large according to that the output of the acceleration sensor is above the acceleration threshold, and does not increase the rotation speed of the drum. Therefore, it is possible to prevent the occurrence of vibration and noise caused by increasing the rotation speed of the drum in a state where the bias of the laundry is large during the dehydration process.
  • the rotation speed of the drum when it is determined by the determination unit that the rotation speed of the drum cannot be increased, the rotation speed of the drum is maintained for a predetermined time. Therefore, compared with the case where the rotation of the drum is stopped every time, the operating efficiency of the washing machine is improved.
  • the possibility of the acceleration sensor malfunctioning is high. Therefore, it is possible to prevent the rotation speed of the drum from increasing in a state where water remains between the drum and the outer cylinder based on the output of the acceleration sensor at this time.
  • FIG. 1 is a schematic sectional view of a washing machine 1 according to a first embodiment of the present invention.
  • FIG. 2 is a control block diagram of the washing machine 1 of FIG. 1.
  • FIG. 3 is a diagram showing a calculation method of a motor output.
  • FIG. 4 is a diagram showing a calculation method of an acceleration output.
  • FIG. 5 is a graph showing a waveform of an acceleration signal from the acceleration sensor 12.
  • FIG. 6 is a flowchart showing an operation when determining whether the acceleration sensor has failed in the washing machine 1 of FIG. 1.
  • FIG. 7 is a flowchart showing the operation of the spin-drying process of the washing machine 1 of FIG. 1.
  • Fig. 8 is a control block diagram of a washing machine according to a second embodiment of the present invention.
  • FIG. 9 is a flowchart showing the operation of the spin-drying process of the washing machine of FIG. 8.
  • FIG. 10 is a control block diagram of a washing machine according to a third embodiment of the present invention.
  • FIG. 11 is a flowchart showing the operation of the spin-drying process of the washing machine of FIG. 10.
  • FIG. 1 is a schematic sectional view of a washing machine 1 according to a first embodiment of the present invention.
  • the washing machine 1 according to this embodiment can be applied to, for example, a laundromat and a household, and is generally called a drum washing machine.
  • the washing machine 1 includes a washing machine main body 1a and a washing drum 1b. 3; drive device 20; and control section 50.
  • the washing machine body 1a shown in FIG. 1 has a substantially rectangular parallelepiped shape.
  • the front surface 10a of the washing machine main body 1a is formed with an opening 11 for feeding laundry to the drum 2, and an opening and closing cover (not shown) capable of opening and closing the opening 11 is attached.
  • the washing machine 1 of this embodiment is referred to as a drum-type full-automatic washing machine in which the washing tub 1b is installed in a substantially horizontal direction.
  • the outer tub 3 is a bottomed cylindrical member disposed inside the washing machine main body 1a, and can store wash water therein.
  • an outer peripheral surface 3 a of the outer tube 3 is equipped with an acceleration sensor 12 capable of detecting accelerations in three directions, for example, a left-right direction, an up-down direction, and a front-rear direction.
  • the acceleration sensor 12 is a three-axis sensor capable of detecting accelerations in the left-right direction, the up-down direction, and the front-back direction.
  • the acceleration sensor 12 only needs to be able to detect the acceleration of the drum 2 or the outer cylinder 3, and its configuration is not limited.
  • the outer tube 3 is connected to a discharge path 3b capable of discharging wash water to the outside.
  • the discharge path 3b is provided with a discharge valve 3c which can be opened and closed.
  • the drum 2 is a bottomed cylindrical member that is disposed coaxially with the outer cylinder 3 and is rotatably supported in the outer cylinder 3.
  • the drum 2 is capable of accommodating laundry inside, and the wall surface of the drum 2 has a plurality of through holes.
  • the driving device 20 rotates the pulley 15 and the transmission belt 15 a by the motor 10, and rotates the driving shaft 17 protruding toward the bottom 2 c of the drum 2 to provide a driving force for the drum 2 and rotate the drum 2.
  • FIG. 2 is a control block diagram of the washing machine 1 according to the present embodiment.
  • the control unit 50 of the washing machine 1 includes, for example, a microcomputer, and includes: a CPU; a ROM that stores a program that controls the operation of the washing machine 1; and a RAM that temporarily stores data used when the program is executed.
  • the operation of the washing machine 1 is controlled by the control unit 50.
  • the control unit 50 is connected to a motor 10 and an acceleration sensor 12.
  • the control unit 50 includes a motor output calculation unit 51, an acceleration output calculation unit 52, an output difference calculation unit 53, a dehydration acceleration determination unit 54, a failure determination unit 55, and a motor control unit 56.
  • the motor output calculation unit 51 calculates the difference between the current value of the motor 10 at the current time and the current value of the motor 10 when the rotation speed of the drum 2 is 400 rpm in the medium speed region.
  • the output data from the motor 10 is processed by a microcomputer.
  • the analog input port of the microcomputer has a 10-bit AD conversion function
  • the current value 0 to 8A of the motor 10 is decomposed into 1024, and the motor output is digitized into Microcomputer value.
  • a method for calculating the difference between the current value of the motor 10 at the current time and the current value of the motor 10 when the rotation speed of the drum 2 is 400 rpm as a motor output will be described with reference to FIG. 3.
  • step S1 the control unit 50 measures the current value of the motor 10 when the rotation speed of the drum 2 is 400 rpm, and stores the current value. Therefore, in the dehydration process, when the rotation speed of the drum 2 reaches 400 rpm, the current value of the motor 10 is measured.
  • step S2 the control unit 50 obtains the current value of the motor 10, and calculates the difference between the current value of the motor 10 at the current time and the current value of the motor 10 when the rotation speed of the drum 2 is 400 rpm.
  • the difference between the above current values corresponds to the magnitude of the load of the motor.
  • the acceleration output calculation unit 52 calculates the acceleration change amount during one rotation period of the drum 2 as an acceleration output in the medium speed region.
  • the output data from the acceleration sensor 12 is processed by a microcomputer.
  • the analog input port of the microcomputer has a 10-bit AD conversion function
  • the output 0 to 5V of the acceleration sensor 12 is decomposed into 1024, and the acceleration output is digitized.
  • Microcomputer value A method of calculating an acceleration change amount during one rotation period of the drum 2 as an acceleration output will be described with reference to FIGS. 4 and 5.
  • step S101 the control unit 50 acquires an acceleration signal from the acceleration sensor 12, and in step S102, performs noise processing through a low-pass filter.
  • FIG. 5 is a graph showing the output of the acceleration sensor 12.
  • the waveform of the acceleration signal from the acceleration sensor 12 has a maximum value (max) and a minimum value (min), and is a waveform that changes periodically. Therefore, in step S103, the control unit 50 calculates the amount of change in acceleration during one rotation period of the drum 2 based on the difference between the maximum value (max) and the minimum value (min).
  • the acceleration signal from the acceleration sensor 12 includes vibrations in three axial directions, so the output of the acceleration sensor 12 is an output that reflects vibrations in the left-right direction, the up-down direction, and the front-rear direction.
  • the output difference calculation unit 53 calculates an output difference obtained by subtracting the motor output calculated by the motor output calculation unit 51 from the acceleration output calculated by the acceleration output calculation unit 52.
  • the motor output and the acceleration output are digitized into a microcomputer value, so the output difference is calculated as the difference between the microcomputer values.
  • the dehydration acceleration determination unit 54 determines that it is not between the drum 2 and the outer cylinder 3 In a state where water remains in between, the rotation speed of the drum 2 can be increased. In addition, when the output difference obtained by subtracting the motor output from the acceleration output is less than the first threshold value, the dehydration acceleration determination unit 54 determines that water is left between the drum and the outer cylinder, and the rotation speed of the drum 2 cannot be increased.
  • the first threshold value can be expressed as the continuity of the linear function of the rotation speed of the drum 2, but the slope and intercept change with the change of the rotation speed, or are stored in RAM in the form of a table.
  • the dehydration acceleration determination unit 54 determines that the state where water remains between the drum 2 and the outer cylinder 3 has been eliminated, and the rotation speed of the drum 2 can be increased.
  • the second threshold value is a value larger than the first threshold value.
  • the failure determination unit 55 determines whether a failure has occurred in the acceleration sensor 12 based on the acceleration output based on the acceleration signal from the acceleration sensor 12. In the present embodiment, when the acceleration output of the acceleration sensor 12 does not change when the rotation speed of the drum 2 increases, the failure detection unit 55 determines that the acceleration sensor 12 has failed.
  • the cases where the acceleration output of the acceleration sensor 12 does not change include a case where the acceleration output of the acceleration sensor 12 is 0, and a case where the amount of change in the acceleration output of the acceleration sensor 12 is equal to or less than a predetermined amount.
  • the motor control unit 56 controls the rotation speed of the drum 2 by changing the motor current based on the determination made by the dehydration acceleration determination unit 54.
  • the motor control unit 56 of this embodiment changes the motor current so that the rotation speed of the drum 2 rises at a predetermined rising speed corresponding to the rotation speed of the drum 2 at the current time.
  • the motor control unit 56 changes the motor current such that the rotation speed increases by 20 rpm per second until the rotation speed of the drum 2 reaches 400 rpm, and changes the motor current such that the rotation speed increases by 5 rpm per second until the rotation speed of the drum 2 reaches 600 rpm.
  • the motor current was changed so that the rotation speed increased by 20 rpm per second until the rotation speed of the drum 2 reached 800 rpm.
  • the motor control unit 56 continues the dehydration process when the rotation speed of the drum 2 reaches the target rotation speed (for example, 800 rpm) during the dehydration process, and ends the dehydration process after a predetermined predetermined dehydration time has elapsed.
  • the target rotation speed for example, 800 rpm
  • the motor control unit 56 increases the current of the motor 10 so that the rotation speed of the drum 2 rise.
  • the motor control unit 56 does not change the current of the motor 10 so that the rotation speed of the drum 2 Maintain for a specified time.
  • the dehydration acceleration determination unit 54 determines that the output difference can be improved.
  • the motor control unit 56 increases the current of the motor 10 to increase the rotation speed of the drum 2.
  • the washing machine 1 includes a bottomed cylindrical drum 2 provided to be rotatable around an axis; a motor 10 that rotationally drives the drum 2 via a drive shaft 17 protruding from the bottom of the drum 2; an acceleration sensor 12, Detect the acceleration of the drum 2; the dehydration acceleration determination unit 54 as a determination unit, after the rotation speed of the drum 2 reaches a predetermined speed or more during the dehydration process, the output difference is the output of the acceleration sensor 12 minus the output of the motor 10 When the difference is less than the first threshold, it is determined that the rotation speed of the drum 2 cannot be increased; and the motor control section 56 as a control unit controls the motor 10 based on the determination made by the dehydration acceleration determination section 54.
  • the washing machine 1 is configured to detect that water remains between the drum 2 and the outer tub 3 based on the fact that the output difference obtained by subtracting the output of the motor 10 from the output of the acceleration sensor 12 is less than the first threshold.
  • the state does not increase the rotation speed of the drum 2. Therefore, it is possible to prevent the abnormal sound from being generated by rotating the drum 2 in a state where water remains between the drum 2 and the outer drum 3.
  • step S201 when the operation of the washing machine 1 is started, the control unit 50 repeatedly determines whether the acceleration output based on the acceleration signal from the acceleration sensor 12 is 0. When the output of the acceleration sensor 12 is not 0, the process proceeds to step S202.
  • step S202 when the rotation speed of the drum 2 is increased, the control unit 50 determines whether the amount of change in the acceleration output based on the acceleration signal from the acceleration sensor 12 is equal to or less than a predetermined amount.
  • the predetermined amount is an amount for determining whether or not the acceleration output based on the acceleration signal from the acceleration sensor 12 is appropriately increased as the rotation speed of the drum 2 increases.
  • the process proceeds to step S203.
  • step S203 the control unit 50 determines that the acceleration sensor 12 is not malfunctioning, uses both the motor output and the acceleration output, and continues the operation of the washing machine 1.
  • step S201 When the acceleration output of the acceleration sensor 12 is 0 in step S201 and when the change amount of the acceleration output in step S202 is less than a predetermined amount, the process proceeds to step S204 and the control unit 50 determines that the acceleration sensor 12 has failed and is not used The acceleration output uses only the motor output to continue the operation of the washing machine 1.
  • the acceleration sensor 12 fails, the operation of the washing machine 1 is continued using only the motor output. Therefore, in this case, in the washing machine 1 of the present embodiment, it is not possible to detect a state where water remains between the drum 2 and the outer drum 3 based on both the motor output and the acceleration output.
  • the dehydration acceleration determination unit 54 determines that the rotation speed of the drum 2 cannot be increased.
  • the output of the acceleration sensor 12 does not change when the rotation speed of the drum 2 increases, and the possibility of the acceleration sensor 12 malfunctioning is high. Therefore, it is possible to prevent the rotation speed of the drum 2 from being increased in a state where water remains between the drum 2 and the outer cylinder 3 based on the output of the acceleration sensor 12 at this time.
  • step S301 when the dehydration process is started, the control unit 50 controls the motor 10 to rotate and drive the drum 2.
  • step S302 the control unit 50 repeatedly determines whether the rotation speed of the drum 2 has reached a predetermined rotation speed (for example, 400 rpm) (whether the rotation speed of the drum 2 is in a medium speed range). When the rotation speed of the drum 2 reaches a predetermined rotation speed, the process proceeds to step S303.
  • a predetermined rotation speed for example, 400 rpm
  • step S303 the control unit 50 calculates the acceleration change amount during one rotation period of the drum 2 as the acceleration output of the acceleration sensor 12 based on the acceleration signal from the acceleration sensor 12.
  • step S304 the control unit 50 detects the current value of the motor 10 at the current time as a motor output, and calculates the difference between the current value of the motor 10 at the current time and the current value of the motor 10 when the rotation speed of the drum 2 is 400 rpm.
  • step S305 the control unit 50 determines, based on the acceleration output and the motor output calculated in steps S303 and S304, whether the output difference obtained by subtracting the motor output from the acceleration output is less than a first threshold.
  • step S305 if the output difference obtained by subtracting the motor output from the acceleration output is greater than or equal to the first threshold (S305: NO), the process proceeds to step S306, and the control unit 50 increases the rotation speed of the drum 2 to accelerate dehydration.
  • step S306 the control unit 50 increases the rotation speed of the drum 2 at a predetermined rising speed corresponding to the rotation speed of the drum 2 at the current time. When a predetermined rising time has elapsed, the process proceeds to step S307.
  • step S307 it is determined whether the rotation speed of the drum 2 has reached the target rotation speed.
  • the control unit 50 continues the dehydration process, and ends the dehydration process after a predetermined predetermined dehydration time has elapsed.
  • step S307 when the rotation speed of the drum 2 has not reached the target rotation speed (S307: No), it moves to step S303.
  • step S305 if the output difference obtained by subtracting the motor output from the acceleration output is less than the first threshold (S305: YES), the process proceeds to step S309.
  • step S309 because the output difference obtained by subtracting the motor output from the acceleration output is less than the first threshold, water is left between the drum 2 and the outer cylinder 3.
  • the control unit 50 stops the acceleration of dehydration and maintains the rotation speed of the drum 2. set time. In some cases, by continuing the operation while maintaining the rotation speed of the drum 2 for a predetermined time, water is discharged between the drum 2 and the outer tube 3, thereby eliminating the state where water remains between the drum 2 and the outer tube 3. Then, it progresses to step S310.
  • the motor control unit 56 controls the motor 10 so that the rotation speed of the drum 2 is maintained for a predetermined time.
  • the rotation speed of the drum 2 when it is determined by the dehydration acceleration determination unit 54 that the rotation speed of the drum 2 cannot be increased, the rotation speed of the drum 2 is maintained for a predetermined time. In comparison, the operating efficiency of the washing machine 1 is improved.
  • step S310 the control unit 50 calculates the acceleration output of the acceleration sensor 12 based on the acceleration signal from the acceleration sensor 12 after maintaining the rotation speed of the drum 2 for a predetermined time in step S309.
  • the calculation method of the acceleration output is the same as that of step S303.
  • step S311 the control unit 50 detects the current value of the motor 10 after the rotation speed of the drum 2 is maintained for a predetermined time in step S309, and calculates the motor output.
  • the calculation method of the motor output is the same as that of step S304.
  • step S312 the control unit 50 determines, based on the acceleration output and the motor output calculated in steps S310 and S311, whether the output difference obtained by subtracting the motor output from the acceleration output is greater than a second threshold.
  • the output difference is greater than the second threshold (S312: YES)
  • the control unit 50 increases the speed of the drum 2 and accelerates Dehydration.
  • step S309 the control unit 50 continues to maintain the rotation speed of the drum 2 State at a specified time.
  • the dehydration acceleration determination unit 54 of the determination unit determines that the rotation speed of the drum 2 can be increased.
  • the washing machine 1 is configured to detect that water remains between the drum 2 and the outer tub 3 based on the fact that the output difference obtained by subtracting the output of the motor 10 from the output of the acceleration sensor 12 is greater than the second threshold. The condition has been eliminated, causing the rotation speed of the drum 2 to increase. Therefore, when the state where water remains between the drum 2 and the outer cylinder 3 has been eliminated, the rotation speed of the drum 2 can be increased to accelerate dehydration.
  • the second threshold value is larger than the first threshold value. Therefore, in the washing machine 1 according to the present embodiment, the second threshold value for detecting that the state of water remaining between the drum 2 and the outer drum 3 has been eliminated is larger than that for detecting that remaining between the drum 2 and the outer drum 3
  • the first threshold of the state of water so that when the state of water remaining between the drum 2 and the outer cylinder 3 is indeed eliminated, the rotation speed of the drum 2 can be increased to accelerate dehydration.
  • the main difference between the washing machine of this embodiment and the washing machine 1 of the first embodiment is that in the first embodiment, whether to accelerate dehydration is determined based on the output difference obtained by subtracting the motor output from the acceleration output. In the process, it is determined whether to accelerate dehydration based on an output ratio obtained by dividing the acceleration output by the motor output.
  • the configuration of the washing machine according to this embodiment that is the same as that of the washing machine 1 according to the first embodiment is omitted.
  • control unit 150 of the washing machine of this embodiment includes a motor output calculation unit 51, an acceleration output calculation unit 52, an output ratio calculation unit 153, a dehydration acceleration determination unit 154, a failure determination unit 55, and a motor control unit 56 .
  • the output ratio calculation unit 153 calculates an output ratio (acceleration output / motor output) obtained by dividing the acceleration output calculated by the acceleration output calculation unit 52 by the motor output calculated by the motor output calculation unit 51.
  • the motor output and the acceleration output are digitized into a microcomputer value, so the output ratio is calculated as the ratio of the microcomputer value.
  • the dehydration acceleration determination unit 154 determines that it is not between the drum 2 and the outer cylinder 3 In a state where water remains, the rotation speed of the drum 2 can be increased. In addition, when the output ratio obtained by dividing the acceleration output by the motor output is less than the first threshold value, the dehydration acceleration determination unit 154 determines that water is left between the drum and the outer cylinder, and the rotation speed of the drum 2 cannot be increased.
  • the first threshold value can be expressed as the continuity of the linear function of the rotation speed of the drum 2, but the slope and intercept change with the change of the rotation speed, or stored in RAM as a table.
  • the dehydration acceleration determination unit 154 It is determined that the state where water remains between the drum 2 and the outer drum 3 has been eliminated, and the rotation speed of the drum 2 can be increased.
  • the second threshold value is a value larger than the first threshold value.
  • the washing machine includes a bottomed cylindrical drum 2 provided to be rotatable around an axis; a motor 10 that rotationally drives the drum 2 via a drive shaft 17 protruding from the bottom of the drum 2; an acceleration sensor 12 that detects Acceleration of the drum 2; the dehydration acceleration determination unit 154 as a determination unit, after the rotation speed of the drum 2 reaches a predetermined rotation speed or higher in the dehydration process, the output ratio is the first output ratio obtained by dividing the output of the acceleration sensor 12 by the output of the motor 10. If it is less than the first threshold, it is determined that the rotation speed of the drum 2 cannot be increased; and the motor control section 56 as a control unit controls the motor 10 based on the determination made by the dehydration acceleration determination section 154.
  • the washing machine is configured to detect that water remaining between the drum 2 and the outer drum 3 is detected based on the fact that the output ratio obtained by dividing the output of the acceleration sensor 12 by the output of the motor 10 is less than the first threshold. State, the rotation speed of the drum 2 is not increased. Therefore, it is possible to prevent the abnormal sound from being generated by rotating the drum 2 in a state where water remains between the drum 2 and the outer drum 3.
  • steps S401 to S404 in FIG. 9 is the same as the description of steps S301 to S304 in FIG. 7, and thus the description is omitted.
  • step S405 the control unit 150 determines whether the output ratio obtained by dividing the acceleration output by the motor output is less than or equal to the first threshold.
  • step S405 if the output ratio obtained by dividing the acceleration output by the motor output is greater than or equal to the first threshold (S405: NO), the process proceeds to step S406, and the control unit 150 increases the rotation speed of the drum 2 to accelerate dehydration.
  • step S406 the control unit 150 increases the rotation speed of the drum 2 at a predetermined rising speed corresponding to the rotation speed of the drum 2 at the current time. When a predetermined rising time has elapsed, the process proceeds to step S407.
  • step S407 it is determined whether the rotation speed of the drum 2 has reached the target rotation speed.
  • the control unit 150 continues the dehydration process, and ends the dehydration process after a predetermined predetermined dehydration time has passed.
  • step S407 when the rotation speed of the drum 2 has not reached the target rotation speed (S407: NO), it moves to step S403.
  • step S405 if the output ratio obtained by dividing the acceleration output by the motor output is less than the first threshold (S405: YES), the process proceeds to step S409.
  • step S409 because the output ratio obtained by dividing the acceleration output by the motor output is less than the first threshold, water is left between the drum 2 and the outer cylinder 3, and the control unit 150 stops the acceleration dehydration and maintains the rotation speed of the drum 2 to a predetermined value. time. In some cases, by continuing the operation while maintaining the rotation speed of the drum 2 for a predetermined time, water is drained between the drum 2 and the outer tube 3 to eliminate a state where water remains between the drum 2 and the outer tube 3. Then, it progresses to step S410.
  • the motor control unit 56 controls the motor 10 to maintain the rotation speed of the drum 2.
  • the dehydration acceleration determination unit 154 determines that the rotation speed of the drum 2 cannot be increased, the rotation speed of the drum 2 is maintained for a predetermined time, and therefore, the rotation of the drum 2 is stopped every time. In comparison, the operation efficiency of the washing machine 1 is improved.
  • step 410 the control unit 150 calculates the acceleration output of the acceleration sensor 12 based on the acceleration signal from the acceleration sensor 12 after maintaining the rotation speed of the drum 2 for a predetermined time in step S409.
  • the calculation method of the acceleration output is the same as that of step S403.
  • step S411 the control unit 150 detects the current value of the motor 10 after the rotation speed of the drum 2 is maintained for a predetermined time in step S409, and calculates the motor output.
  • the calculation method of the motor output is the same as that of step S404.
  • step S412 the control unit 150 determines, based on the acceleration output and the motor output calculated in steps S410 and S411, whether the output ratio obtained by dividing the acceleration output by the motor output is greater than or equal to the second threshold. In step S412, when the output ratio obtained by dividing the acceleration output by the motor output is equal to or greater than the second threshold (S412: Yes), it is determined that the state of water remaining between the drum 2 and the outer cylinder 3 has been eliminated, and the process proceeds to step S406.
  • the control unit 150 increases the rotation speed of the drum 2 to accelerate dehydration.
  • step S412 when the output ratio obtained by dividing the acceleration output by the motor output is less than the second threshold (S412: NO), the control unit 150 determines that the state of the water remaining between the drum 2 and the outer cylinder 3 has not been eliminated. The process proceeds to step S409, and the rotation speed of the drum 2 is maintained for a predetermined time.
  • the dehydration acceleration determination unit 154 as a determination unit determines that the rotation speed of the drum 2 can be increased.
  • the washing machine of the present embodiment is configured to detect that water remaining between the drum 2 and the outer tub 3 is detected based on the fact that the output ratio obtained by dividing the output of the acceleration sensor 12 by the output of the motor 10 is greater than the second threshold.
  • the state has been eliminated, causing the rotation speed of the drum 2 to increase. Therefore, when the state where water remains between the drum 2 and the outer cylinder 3 has been eliminated, the rotation speed of the drum 2 can be increased to accelerate dehydration.
  • the main difference between the washing machine of this embodiment and the washing machine of the first embodiment is that in the first embodiment, whether to accelerate dehydration is determined based on the output difference obtained by subtracting the motor output from the acceleration output. In contrast, in this embodiment, Whether to accelerate dehydration is determined by separately determining the motor output and the acceleration output.
  • the configuration of the washing machine according to this embodiment that is the same as that of the washing machine 1 according to the first embodiment is omitted.
  • control unit 250 of the washing machine of the present embodiment includes a motor output calculation unit 51, an acceleration output calculation unit 52, a dehydration acceleration determination unit 254, a failure determination unit 55, and a motor control unit 56.
  • the dehydration acceleration determination unit 254 determines that the vibration of the drum 2 is small and is in the drum 2 In a state where no water remains with the outer cylinder 3, the rotation speed of the drum 2 can be increased. In addition, when the motor output is equal to or higher than the motor threshold and the acceleration output is smaller than the acceleration threshold, even if the vibration of the drum 2 is small, the dehydration acceleration determination unit 254 determines that water is left between the drum and the outer cylinder, and cannot be improved. The rotation speed of the drum 2.
  • the dehydration acceleration determination determines that the state where water remains between the drum 2 and the outer cylinder 3 has been eliminated, and the rotation speed of the drum 2 can be increased.
  • the dehydration acceleration determination unit 254 determines that the rotation speed of the drum 2 cannot be increased.
  • the washing machine includes a bottomed cylindrical drum 2 provided to be rotatable around an axis; a motor 10 that rotationally drives the drum 2 via a drive shaft 17 protruding from the bottom of the drum 2; an acceleration sensor 12 that detects Acceleration of the drum 2; the dehydration acceleration determination unit 254 as a determination unit, after the rotation speed of the drum 2 reaches a predetermined speed or higher during the dehydration process, when the output of the motor 10 is above the motor threshold and the output of the acceleration sensor 12 is less than the acceleration threshold , It is determined that the rotation speed of the drum 2 cannot be increased; and the motor control section 56 as a control unit controls the motor 10 based on the determination made by the dehydration acceleration determination section 254.
  • the washing machine is configured to detect a state where water remains between the drum 2 and the outer tub 3 based on the fact that the output of the motor 10 is greater than the motor threshold and the output of the acceleration sensor 12 is less than the acceleration threshold.
  • the rotation speed of the drum 2 is not increased. Therefore, it is possible to prevent an abnormal sound from being generated when the drum 2 is rotated in a state where water remains between the drum 2 and the outer drum 3 during the dehydration process.
  • steps S501 to S504 in FIG. 11 is the same as the description of steps S301 to S304 in FIG. 7, and thus the description is omitted.
  • step S505 the control unit 250 determines whether the motor output is less than a motor threshold. When the motor output is less than the motor threshold (S505: YES), it proceeds to step S506 to determine whether the acceleration output is less than the acceleration threshold. In step S506, if the acceleration output is less than the acceleration threshold (S506: YES), the process proceeds to step S507, the rotation speed of the drum 2 is increased, and the spin-drying is accelerated. In step S507, the control unit 250 increases the rotation speed of the drum 2 at a predetermined rising speed corresponding to the rotation speed of the drum 2 at the current time. When a predetermined rising time has elapsed, the process proceeds to step S508.
  • step S508 it is determined whether the rotation speed of the drum 2 has reached the target rotation speed.
  • the control unit 250 continues the dehydration process and ends the dehydration process after a predetermined predetermined dehydration time has elapsed.
  • step S508 when the rotation speed of the drum 2 has not reached the target rotation speed (S508: No), it moves to step S503.
  • step S506 when the acceleration output is equal to or greater than the acceleration threshold (S506: NO), the bias of the laundry is large, so the process proceeds to step S510 to stop dehydration.
  • the determination unit 254 determines that the rotation of the drum 2 is stopped.
  • the washing machine of the present embodiment is configured to detect that the bias of the laundry is large based on the fact that the output of the acceleration sensor 12 is equal to or more than the acceleration threshold value, so that the rotation speed of the drum 2 is not increased. Therefore, it is possible to prevent vibration and noise from being generated when the rotation speed of the drum 2 is increased in a state where the bias of the laundry is large during the dehydration process.
  • step S505 if the motor output is greater than or equal to the motor threshold (S505: NO), it proceeds to step S511 to determine whether the acceleration output is less than the acceleration threshold. When the acceleration output is less than the acceleration threshold (S511: YES), it is determined that water is left between the drum 2 and the outer cylinder 3, and the process proceeds to step S512, the acceleration dehydration is stopped, and the rotation speed of the drum 2 is maintained for a predetermined time. In some cases, by continuing the operation while maintaining the rotation speed of the drum 2 for a predetermined time, water is drained between the drum 2 and the outer tube 3 to eliminate a state where water remains between the drum 2 and the outer tube 3. In step S511, when the acceleration output is equal to or greater than the acceleration threshold (S511: NO), the bias of the laundry is large, so the process proceeds to step S510, and the dehydration is stopped.
  • the motor control unit 56 controls the motor 10 so that the rotation speed of the drum 2 is maintained for a predetermined time.
  • the dehydration acceleration determination unit 254 determines that the rotation speed of the drum 2 cannot be increased, the rotation speed of the drum 2 is maintained for a predetermined time, and therefore, the rotation of the drum 2 is stopped every time. In comparison, the operating efficiency of the washing machine is improved.
  • step S513 the control unit 250 calculates the acceleration output of the acceleration sensor 12 based on the acceleration signal from the acceleration sensor 12 after the rotation speed of the drum 2 is maintained for a predetermined time in step S512.
  • the calculation method of the acceleration output is the same as that of step S503.
  • step S514 the control unit 250 determines whether the acceleration output calculated in step S513 is less than the acceleration threshold.
  • the control unit 250 detects the current value of the motor 10 after maintaining the rotation speed of the drum 2 for a predetermined time in step S512, and calculates the motor output.
  • the calculation method of the motor output is the same as that of step S504.
  • step S514 when the acceleration output is equal to or greater than the acceleration threshold (S514: NO), the bias of the laundry is large, so the process proceeds to step S510, and the dehydration is stopped.
  • step S516 the control unit 250 determines whether the motor output calculated in step S515 is less than a motor threshold. When the motor output is less than the motor threshold (S516: YES), it is determined that the state of water remaining between the drum 2 and the outer drum 3 has been eliminated, and the process proceeds to step S507 to increase the rotation speed of the drum 2 to accelerate dehydration. In step S516, when the motor output is greater than or equal to the motor threshold (S516: NO), the control unit 250 determines that the state of the water remaining between the drum 2 and the outer drum 3 has not been eliminated, and moves to step S512 to continue the drum The rotation speed of 2 is maintained for a predetermined time.
  • the dehydration acceleration as the determination unit
  • the determination unit 254 determines that the rotation speed of the drum 2 can be increased.
  • the washing machine of the present embodiment is configured to detect that water remains between the drum 2 and the outer tub 3 based on the fact that the output of the motor 10 becomes less than the motor threshold when the output of the acceleration sensor 12 is less than the acceleration threshold. The condition has been eliminated, causing the rotation speed of the drum 2 to increase. Therefore, when the state where water remains between the drum 2 and the outer cylinder 3 has been eliminated, the rotation speed of the drum 2 can be increased to accelerate dehydration.
  • the motor 10 when it is determined by the dehydration acceleration determination unit that the rotation speed of the drum 2 cannot be increased, the motor 10 is controlled to maintain the rotation speed of the drum 2, but the motor 10 may be controlled to decrease the rotation speed of the drum 2.
  • the first threshold value and the second threshold value are different values, but the first threshold value and the second threshold value may be the same.
  • the dehydration acceleration determination unit 254 determines that the bias of the laundry is large and stops the dehydration. However, the rotation speed of the drum 2 may be maintained and the drum may be reduced. 2 speed.
  • the motor output calculation unit 51 calculates the difference between the current value of the motor 10 at the current time and the current value of the motor 10 when the rotation speed of the drum 2 is 400 rpm, but the method for calculating the motor output by the motor output calculation unit 51 Not limited to this.
  • the motor output calculation unit 51 may calculate the difference between the current value of the motor 10 at the current time and the current value of the motor 10 when the rotation speed of the drum 2 is other than 400 rpm.
  • the drum 2 is provided to be rotatable about an axis extending in the horizontal direction, but the drum 2 may be provided to be rotatable about an axis extending in the oblique direction (the direction inclined to the vertical direction). In addition, the drum 2 may be provided to be rotatable about an axis extending in the vertical direction.
  • the determining unit 54 determines whether to increase the rotation speed of the drum 2 based on the first output difference obtained by subtracting the output of the motor 10 from the output of the acceleration sensor 12, but the determining unit 54 may also reduce the The second output difference obtained by removing the output of the acceleration sensor 12 determines whether the rotation speed of the drum 2 should be increased. It should be noted that the first threshold value and the second threshold value are set to different values when the determination is made based on the first output difference and when the determination is made based on the second output difference.
  • the determination unit 154 determines whether to increase the rotation speed of the drum 2 according to a first output ratio obtained by dividing the output of the acceleration sensor 12 by the output of the motor 10, but the determination unit 154 may also The second output ratio obtained from the output of the acceleration sensor 12 is used to determine whether the rotation speed of the drum 2 should be increased. It should be noted that, when the determination is made based on the first output ratio and when the determination is made based on the second output ratio, the first threshold value and the second threshold value are set to different values.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)

Abstract

一种洗衣机（1），其能通过检测出在滚筒（2）与外筒（3）之间残留有水的状态，从而采取恰当的对策。洗衣机（1）具备：有底筒状的滚筒（2），设置为能绕轴线旋转；马达（10），经由从滚筒（2）的底部突出的驱动轴（17）对滚筒（2）进行旋转驱动；加速度传感器(12)，检测滚筒（2）的加速度；脱水加速判定部(54)，在脱水过程中滚筒（2）的转速达到规定转速以上之后，在加速度传感器（12）的输出减去马达（10）的输出所得的输出差小于第一阈值的情况下，判定为无法提高滚筒的转速；以及马达控制部(56)，根据脱水加速判定部(54)作出的判定控制马达(10)。

Description

洗衣机 技术领域
本发明涉及一种例如进行洗涤过程、漂洗过程以及脱水过程的洗衣机。
背景技术
作为现有的洗衣机，专利文献1中记载了一种洗衣机，其在外筒的内部配置有用于收容洗涤物的滚筒。在该洗衣机中，在滚筒的周壁形成有通水孔，在滚筒内从洗涤物中脱去的水通过通水孔排出至外筒，外筒内的水通过排水口排出。在外筒的下侧设置有用于对滚筒进行旋转驱动的马达。
洗衣机的脱水过程存在如下问题：当滚筒因洗涤物向滚筒的内侧壁贴附的贴附方式等而发生不平衡时，若洗涤物的偏置大，则旋转时的滚筒的偏心变大，旋转需要的转矩大，导致无法开始脱水运转。
因此，专利文献1中记载了一种洗衣机，其着眼于“马达电流的变动因负荷转矩的变动而产生，在滚筒的一个旋转期间内，在负荷转矩达到最大的时刻会产生马达电流的峰值”这一情况，通过构成马达控制电路的变频电路的转矩电流来检测转矩的变动，根据该转矩的变动来检测洗涤物的偏置即不平衡量。在该洗衣机中，在不平衡量大于规定值的情况下，执行平衡调整运转，消除洗涤物的偏置。
在洗衣机的脱水过程中，洗涤物中所含的水经由洗衣机的排水路径排出到外部，但是例如在对含有大量水分的洗涤物进行脱水的情况下、排水路径的结构不好的情况下，有时水会残留于滚筒与外筒之间，这些水成为阻碍，妨碍滚筒的旋转。此外，在滚筒与外筒之间残留有水的状态下旋转滚筒的情况下，有时会产生异常声，该异常声随着滚筒的转速上升而增大。
因此，洗衣机中，在水尚未排净而残留于滚筒与外筒之间的情况下，需要采取恰当的对策。
但是，当滚筒在滚筒与外筒之间残留有水的状态下被旋转驱动时，残留在滚筒与外筒之间的水会成为阻碍，用于对滚筒进行旋转驱动的马达的负荷变大。因此，在像专利文献1那样根据马达的电流值检测洗涤物的偏置的洗衣机中，会错误地检测为不平衡量大，多次反复地进行平衡调整运转。
此外，在现有的洗衣机中，有一种洗衣机，其具有检测滚筒的加速度的加速度传感器，根据由加速度传感器检测出的加速度，检测洗涤物的偏置即不平衡量。
但是，加速度传感器是检测滚筒的振动(加速度)的传感器，但是，即使滚筒在滚筒与外筒之间残留有水的状态下被旋转驱动，滚筒的振动量也小。因此，无法根据由加速度传感器检测出的滚筒的加速度来检测出滚筒与外筒之间残留有水的状态。
因此，本发明的发明者对检测滚筒与外筒之间残留有水的状态的方法进行了研究，发现能通过使用对滚筒进行旋转驱动的马达的负荷和由加速度传感器检测出的滚筒的加速度这双方来检测出滚筒与外筒之间残留有水的状态。
现有技术文献
专利文献
专利文献1：日本特开平9－290089号公报
发明内容
发明所要解决的问题
本发明的目的在于提供一种洗衣机，其能通过检测在滚筒与外筒之间残留有水的状态而采取恰当的对策。
用于解决问题的方案
即，本发明的洗衣机的特征在于，具备：有底筒状的滚筒，设置为能绕轴线旋转；马达，经由从所述滚筒的底部突出的驱动轴对所述滚筒进行旋转驱动；加速度传感器，检测所述滚筒的加速度；判定单元，在脱水过程中所述滚筒的转速达到规定转速以上之后，在所述加速度传感器的输出减去所述马达的输出 所得的第一输出差小于第一阈值的情况、或者所述马达的输出减去所述加速度传感器的输出所得的第二输出差为第一阈值以上的情况下，判定为无法提高所述滚筒的转速；以及控制单元，根据所述判定单元作出的判定控制所述马达。
本发明的洗衣机的特征在于，在判定为无法提高所述滚筒的转速之后，当所述第一输出差为第二阈值以上时、或者所述第二输出差小于第二阈值时，所述判定单元判定为能提高所述滚筒的转速。
本发明的洗衣机的特征在于，对于所述第一输出差，所述第二阈值大于所述第一阈值，或者，对于所述第二输出差，所述第二阈值小于所述第一阈值。
本发明的洗衣机的特征在于，具备：有底筒状的滚筒，设置为能绕轴线旋转；马达，经由从所述滚筒的底部突出的驱动轴对所述滚筒进行旋转驱动；加速度传感器，检测所述滚筒的加速度；判定单元，在脱水过程中所述滚筒的转速达到规定转速以上之后，在所述加速度传感器的输出除以所述马达的输出所得的第一输出比小于第一阈值的情况、或者所述马达的输出除以所述加速度传感器的输出所得的第二输出比为第一阈值以上的情况下，判定为无法提高所述滚筒的转速；以及控制单元，根据所述判定单元作出的判定控制所述马达。
本发明的洗衣机的特征在于，在判定为无法提高所述滚筒的转速之后，当所述第一输出比为第二阈值以上时、或者所述第二输出比小于第二阈值时，所述判定单元判定为能提高所述滚筒的转速。
本发明的洗衣机的特征在于，对于所述第一输出比，所述第二阈值大于所述第一阈值，或者，对于所述第二输出比，所述第二阈值小于所述第一阈值。
本发明的洗衣机的特征在于，具备：有底筒状的滚筒，设置为能绕轴线旋转；马达，经由从所述滚筒的底部突出的驱动轴对所述滚筒进行旋转驱动；加速度传感器，检测所述滚筒的加速度；判定单元，在脱水过程中所述滚筒的转速达到规定转速以上之后，在所述马达的输出为马达阈值以上且所述加速度传感器的输出小于加速度阈值的情况下，判定为无法提高所述滚筒的转速；以及控制单元，根据所述判定单元作出的判定控制所述马达。
本发明的洗衣机的特征在于，在判定为无法提高所述滚筒的转速之后，在所述加速度传感器的输出小于加速度阈值的状态下，当所述马达的输出小于马 达阈值时，所述判定单元判定为能提高所述滚筒的转速。
本发明的洗衣机的特征在于，在所述加速度传感器的输出为加速度阈值以上的情况下，所述判定单元判定为无法提高所述滚筒的转速或停止所述滚筒的旋转。
本发明的洗衣机额特征在于，在通过所述判定单元判定为无法提高所述滚筒的转速的情况下，所述控制单元控制所述马达使得所述滚筒的转速维持规定时间。
本发明的洗衣机的特征在于，在所述加速度传感器的输出在所述滚筒的转速上升时不变化的情况下，所述判定单元判定为无法提高所述滚筒的转速。
发明效果
本发明的洗衣机设置为：根据加速度传感器的输出减去马达的输出所得的第一输出差小于第一阈值、或者马达的输出减去加速度传感器的输出所得的第二输出差为第一阈值以上这一情况，检测出处于滚筒与外筒之间残留有水的状态，不提高滚筒的转速。因此，能防止在脱水过程中在滚筒与外筒之间残留有水的状态下使滚筒的转速上升而导致产生异常声。
本发明的洗衣机设置为：根据加速度传感器的输出减去马达的输出所得的第一输出差为第二阈值以上、或者马达的输出减去加速度传感器的输出所得的第二输出差小于第二阈值这一情况，检测出滚筒与外筒之间残留有水的状态已消除，使滚筒的转速上升。因此，能在脱水过程中，在滚筒与外筒之间残留有水的状态已消除时，使滚筒的转速上升，加速脱水。
本发明的洗衣机中，用于检测出滚筒与外筒之间残留有水的状态已消除的第二阈值和用于检测出处于滚筒与外筒之间残留有水的状态的第一阈值不同，因此，能在脱水过程中在滚筒与外筒之间残留有水的状态确实已消除时使滚筒的转速上升，加速脱水。
本发明的洗衣机设置为：根据加速度传感器的输出除以马达的输出所得的第一输出比小于第一阈值、或者马达的输出除以加速度传感器的输出所得的第二输出比为第一阈值以上这一情况，检测出处于滚筒与外筒之间残留有水的状态，不提高滚筒的转速。因此，能防止在脱水过程中在滚筒与外筒之间残留有 水的状态下提高滚筒的转速而导致产生异常声。
本发明的洗衣机设置为：根据加速度传感器的输出除以马达的输出所得的第一输出比为第二阈值以上、或者马达的输出除以加速度传感器的输出所得的第二输出比小于第二阈值这一情况，检测出滚筒与外筒之间残留有水的状态已消除，使滚筒的转速上升。因此，能在脱水过程中在滚筒与外筒之间残留有水的状态已消除时使滚筒的转速上升，加速脱水。
本发明的洗衣机中，用于检测出滚筒与外筒之间残留有水的状态已消除的第二阈值和用于检测出处于滚筒与外筒之间残留有水的状态的第一阈值不同，因此，能在脱水过程中在滚筒与外筒之间残留有水的状态确实已消除时使滚筒的转速上升，加速脱水。
本发明的洗衣机设置为：根据马达的输出为马达阈值以上且加速度传感器的输出小于加速度阈值这一情况，检测出处于滚筒与外筒之间残留有水的状态，不提高滚筒的转速。因此，能防止在脱水过程中在滚筒与外筒之间残留有水的状态下使滚筒旋转而导致产生异常声。
本发明的洗衣机中，根据在加速度传感器的输出小于加速度阈值的状态下马达的输出小于马达阈值这一情况，检测出滚筒与外筒之间残留有水的状态已消除，使滚筒的转速上升。因此，能在脱水过程中在滚筒与外筒之间残留有水的状态已消除时使滚筒的转速上升，加速脱水。
本发明的洗衣机设置为：根据加速度传感器的输出为加速度阈值以上，检测出洗涤物的偏置较大，不提高滚筒的转速。因此，能防止在脱水过程中在洗涤物的偏置大的状态下提高滚筒的转速而导致产生振动、噪声。
本发明的洗衣机中，在通过判定单元判定为无法提高滚筒的转速的情况下，滚筒的转速会维持规定时间，因此与每次都停止滚筒的旋转的情况相比，提高了洗衣机的运转效率。
本发明的洗衣机中，根据加速度传感器的输出在滚筒的转速上升时不变化这一情况，加速度传感器发生故障的可能性较高。因此，能防止根据此时的加速度传感器的输出，在滚筒与外筒之间残留有水的状态下使滚筒的转速上升。
附图说明
图1是本发明的第一实施方式的洗衣机1的示意性剖面图。
图2是图1的洗衣机1的控制框图。
图3是表示马达输出的计算方法的图。
图4是表示加速度输出的计算方法的图。
图5是表示来自加速度传感器12的加速度信号的波形的曲线图。
图6是表示在图1的洗衣机1中，判定加速度传感器是否发生故障时的动作的流程图。
图7是表示图1的洗衣机1的脱水过程的动作的流程图。
图8是本发明的第二实施方式的洗衣机的控制框图。
图9是表示图8的洗衣机的脱水过程的动作的流程图。
图10是本发明的第三实施方式的洗衣机的控制框图。
图11是表示图10的洗衣机的脱水过程的动作的流程图。
附图标记说明
1：洗衣机；2：滚筒；10：马达；12：加速度传感器；17：驱动轴；54、154、254：脱水加速判定部(判定单元)；56：马达控制部(控制单元)。
具体实施方式
(第一实施方式)
以下，基于附图对本发明的第一实施方式进行详细说明。图1是本发明的第一实施方式的洗衣机1的示意性剖面图。本实施方式的洗衣机1能适用于诸如自助洗衣店、家庭，通常被称为滚筒洗衣机，其具备：洗衣机主体1a；洗涤筒1b，包括具有大致水平延伸而成的轴线S1的滚筒2和外筒3；驱动装置20；以及控制部50。
图1所示的洗衣机主体1a为大致长方体形状。在洗衣机主体1a的前表面 10a，形成有用于向滚筒2投取洗涤物的开口11，并且装配有能开闭该开口11的未图示的开闭盖。本实施方式的洗衣机1被称为洗涤筒1b装配在大致水平方向的滚筒式全自动洗衣机。
外筒3是配置于洗衣机主体1a的内部的有底筒状的构件，内部能蓄留洗涤水。如图1所示，在外筒3的外周面3a，装配有例如能检测左右方向、上下方向以及前后方向这三个方向上的加速度的加速度传感器12。需要说明的是，在本实施方式中，加速度传感器12是能检测左右方向、上下方向以及前后方向的加速度的三轴传感器。加速度传感器12能检测滚筒2或外筒3的加速度即可，其配置不受限制。此外，在外筒3连接有能向外部排出洗涤水的排出路3b。在该排出路3b设有可开闭地设置的排出阀3c。
滚筒2是与外筒3同轴配置于外筒3内且被自由旋转地支承的有底筒状的构件。滚筒2能在内部收容洗涤物，其壁面具有许多通水孔。如图1所示，驱动装置20通过马达10使带轮15和传动带15a旋转，并且使朝向滚筒2的底部2c伸出的驱动轴17旋转，为滚筒2提供驱动力，使滚筒2旋转。
图2是本实施方式的洗衣机1的控制框图。如图2所示，洗衣机1的控制部50例如由微型计算机等构成，具备：CPU；ROM，储存控制洗衣机1的动作的程序；以及RAM，临时存储执行上述程序时所用的数据等。洗衣机1的运转工作由该控制部50控制。在控制部50连接有马达10和加速度传感器12。
控制部50具有马达输出计算部51、加速度输出计算部52、输出差计算部53、脱水加速判定部54、故障判定部55以及马达控制部56。
脱水起动之后，在中速区域中，作为马达输出，马达输出计算部51对当前时刻的马达10的电流值与滚筒2的转速为400rpm时的马达10的电流值之差进行计算。在本实施方式中，来自马达10的输出数据被微机处理，但是当微机的模拟输入端口具有10bit的AD转换功能时，马达10的电流值0～8A被分解为1024个，马达输出被数字化为微机值。对于作为马达输出对当前时刻的马达10的电流值与滚筒2的转速为400rpm时的马达10的电流值之差进行计算的方法，根据图3进行说明。
＜步骤S1＞
在步骤S1中，控制部50测量滚筒2的转速为400rpm时的马达10的电流值并存储该电流值。因此，在脱水过程中，当滚筒2的转速达到400rpm时，马达10的电流值会被测量。
＜步骤S2＞
在步骤S2中，控制部50获取马达10的电流值，对当前时刻的马达10的电流值与滚筒2的转速为400rpm时的马达10的电流值之差进行计算。上述电流值之差与马达的负荷的大小相对应。
脱水起动之后，在中速区域，作为加速度输出，加速度输出计算部52对滚筒2的一个旋转期间内的加速度变化量进行计算。在本实施方式中，来自加速度传感器12的输出数据被微机处理，但是当微机的模拟输入端口具有10bit的AD转换功能时，加速度传感器12的输出0～5V被分解为1024个，加速度输出被数字化为微机值。对于作为加速度输出对滚筒2的一个旋转期间内的加速度变化量进行计算的方法，根据图4和图5进行说明。
＜步骤S101、S102＞
在步骤S101中，控制部50获取来自加速度传感器12的加速度信号，在步骤S102中，通过低通滤波器进行噪声处理。图5是表示加速度传感器12的输出的曲线图。
＜步骤S103＞
在图5中，来自加速度传感器12的加速度信号的波形具有最大值(max)和最小值(min)，是周期变化的波形。因此，在步骤S103中，控制部50根据最大值(max)与最小值(min)之差，对滚筒2的一个旋转期间内的加速度变化量进行计算。来自加速度传感器12的加速度信号包括3个轴方向的振动，因此加速度传感器12的输出是反映左右方向、上下方向以及前后方向的振动的输出。
输出差计算部53对由加速度输出计算部52计算出的加速度输出减去由马达输出计算部51计算出的马达输出所得的输出差进行计算。在本实施方式中，如上所述，马达输出和加速度输出被数字化为微机值，因此输出差以微机值之差的形式被计算。
在脱水过程中滚筒2的转速达到规定转速以上之后，在加速度输出减去马达输出所得的输出差为第一阈值以上的情况下，脱水加速判定部54判定为不处于滚筒2与外筒3之间残留有水的状态，能提高滚筒2的转速。此外，在加速度输出减去马达输出所得的输出差小于第一阈值的情况下，脱水加速判定部54判定为处于滚筒与外筒之间残留有水的状态，无法提高滚筒2的转速。需要说明的是，第一阈值能表现为滚筒2的转速的一次函数的连续，但斜率、截距随着转速的变化而变化，或者以表格的形式存储在RAM内。
此外，在加速度输出减去马达输出所得的输出差小于第一阈值而判定为无法提高滚筒2的转速之后，当加速度输出减去马达输出所得的输出差达到第二阈值以上时，脱水加速判定部54判定为滚筒2与外筒3之间残留有水的状态已消除，能提高滚筒2的转速。在本实施方式中，第二阈值是大于第一阈值的值。
故障判定部55根据加速度输出，判定加速度传感器12是否发生了故障，该加速度输出基于来自加速度传感器12的加速度信号。本实施方式中，在加速度传感器12的加速度输出于滚筒2的转速上升时不变化的情况下，故障检测部55判定为加速度传感器12发生了故障。加速度传感器12的加速度输出不变化的情况包括：加速度传感器12的加速度输出为0的情况、加速度传感器12的加速度输出的变化量为规定量以下的情况。
马达控制部56根据脱水加速判定部54作出的判定，通过改变马达电流来控制滚筒2的转速。在脱水过程中，本实施方式的马达控制部56改变马达电流使得滚筒2的转速以对应于当前时刻的滚筒2的转速的规定上升速度上升。具体而言，马达控制部56以使转速每秒上升20rpm的方式改变马达电流，直到滚筒2的转速达到400rpm，以使转速每秒上升5rpm的方式改变马达电流，直到滚筒2的转速达到600rpm，以使转速每秒上升20rpm的方式改变马达电流，直到滚筒2的转速达到800rpm。此外，马达控制部56在脱水过程中当滚筒2的转速达到目标转速(例如800rpm)时继续脱水过程，在经过了预定的规定脱水时间之后结束脱水过程。
具体而言，脱水过程中滚筒2的转速达到规定转速以上之后，在通过脱水加速判定部54判定为能提高滚筒2的转速的情况下，马达控制部56增加马达10的电流使得滚筒2的转速上升。
此外，脱水过程中滚筒2的转速达到规定转速以上之后，在通过脱水加速判定部54判定为无法提高滚筒2的转速的情况下，马达控制部56不改变马达10的电流，使得滚筒2的转速维持规定时间。
此外，脱水过程中加速度输出减去马达输出所得的输出差变得小于第一阈值之后，在加速度输出减去马达输出所得的输出差达到第二阈值以上，通过脱水加速判定部54判定为能提高滚筒2的转速的情况下，马达控制部56增加马达10的电流使得滚筒2的转速上升。
即，本实施方式的洗衣机1具备：有底筒状的滚筒2，设置为能绕轴线旋转；马达10，经由从滚筒2的底部突出的驱动轴17对滚筒2进行旋转驱动；加速度传感器12，检测滚筒2的加速度；作为判定单元的脱水加速判定部54，在脱水过程中滚筒2的转速达到规定转速以上之后，在输出差即加速度传感器12的输出减去马达10的输出所得的第一输出差小于第一阈值的情况下，判定为无法提高滚筒2的转速；以及作为控制单元的马达控制部56，根据脱水加速判定部54作出的判定控制马达10。
由此，本实施方式的洗衣机1设置为：根据加速度传感器12的输出减去马达10的输出所得的输出差小于第一阈值这一情况，检测出处于滚筒2与外筒3之间残留有水的状态，不提高滚筒2的转速。因此，能防止在滚筒2与外筒3之间残留有水的状态下使滚筒2旋转而导致产生异常声。
接着，对于洗衣机1中判定加速度传感器12是否发生故障时的动作，根据图6进行说明。
＜步骤S201＞
步骤S201中，当洗衣机1的运转开始时，控制部50反复判断基于来自加速度传感器12的加速度信号的加速度输出是否为0。在加速度传感器12的输出不为0的情况下，进入步骤S202。
＜步骤S202＞
步骤S202中，在滚筒2的转速上升时，控制部50判定基于来自加速度传感器12的加速度信号的加速度输出的变化量是否为规定量以下。规定量是判定基于来自加速度传感器12的加速度信号的加速度输出是否随着滚筒2的转速的 上升而适当地增加的量。在加速度输出的变化量不为规定量以下的情况下，进入步骤S203。
＜步骤S203＞
在步骤S203中，控制部50判定加速度传感器12未发生故障，将马达输出和加速度输出双方并用，继续洗衣机1的运转。
＜步骤S204＞
在步骤S201中加速度传感器12的加速度输出为0的情况下和步骤S202中加速度输出的变化量为规定量以下的情况下，进入步骤S204，控制部50判定为加速度传感器12发生了故障，不使用加速度输出，仅使用马达输出，继续洗衣机1的运转。
如此一来，本实施方式的洗衣机1中，在加速度传感器12发生故障的情况下，仅使用马达输出继续洗衣机1的运转。因此，这种情况下，在本实施方式的洗衣机1中，无法根据马达输出和加速度输出这双方来检测滚筒2与外筒3之间残留有水的状态。
]即，在本实施方式的洗衣机1中，在加速度传感器12的加速度输出于滚筒2的转速上升时不变化的情况下，脱水加速判定部54判定为无法提高滚筒2的转速。
由此，本实施方式的洗衣机1中，根据加速度传感器12的输出在滚筒2的转速上升时不变化这一情况，加速度传感器12发生故障的可能性高。因此，能防止根据此时的加速度传感器12的输出在滚筒2与外筒3之间残留有水的状态下使滚筒2的转速上升。
接着，对于洗衣机1的脱水过程的动作，根据图7进行说明。
＜步骤S301、S302＞
步骤S301中，当脱水过程开始时，控制部50控制马达10，对滚筒2进行旋转驱动。步骤S302中，控制部50反复判断滚筒2的转速是否达到了规定转速(例如，400rpm)(滚筒2的转速是否为中速领域)。在滚筒2的转速达到规定转速的情况下，进入步骤S303。
＜步骤S303＞
步骤S303中，控制部50根据来自加速度传感器12的加速度信号，作为加速度传感器12的加速度输出，对滚筒2的一个旋转期间内的加速度变化量进行计算。
＜步骤S304＞
步骤S304中，控制部50检测当前时刻的马达10的电流值，作为马达输出，对当前时刻的马达10的电流值与滚筒2的转速为400rpm时的马达10的电流值之差进行计算。
＜步骤S305＞
步骤S305中，控制部50根据步骤S303、S304中计算出的加速度输出和马达输出，判定加速度输出减去马达输出所得的输出差是否小于第一阈值以上。
＜步骤S306＞
步骤S305中，在加速度输出减去马达输出所得的输出差为第一阈值以上的情况下(S305：否)，进入步骤S306，控制部50使滚筒2的转速上升，加速脱水。步骤S306中，控制部50使滚筒2的转速以对应于当前时刻的滚筒2的转速的规定上升速度上升，当经过规定的上升时间时，进入步骤S307。
＜步骤S307、S308＞
步骤S307中，判定滚筒2的转速是否达到了目标转速。在滚筒2的转速达到了目标转速的情况下(S307：是)，步骤S308中，控制部50继续脱水过程，在经过了预定的规定脱水时间之后，结束脱水过程。步骤S307中，在滚筒2的转速没有达到目标转速的情况下(S307：否)，移至步骤S303。
＜步骤S309＞
步骤S305中，在加速度输出减去马达输出所得的输出差小于第一阈值的情况下(S305：是)，进入步骤S309。步骤S309中，因为加速度输出减去马达输出所得的输出差小于第一阈值，所以处于滚筒2与外筒3之间残留有水的状态，控制部50停止脱水的加速，将滚筒2的转速维持规定时间。有时，通过在将滚筒2的转速维持规定时间的状态下继续运转，在滚筒2与外筒3之间水被排出， 消除滚筒2与外筒3之间残留有水的状态。之后，进入步骤S310。
即，在本实施方式的洗衣机1中，在通过脱水加速判定部54判定为无法提高滚筒2的转速的情况下，马达控制部56控制马达10使得滚筒2的转速维持规定时间。
由此，本实施方式的洗衣机1中，在通过脱水加速判定部54判定为无法提高滚筒2的转速的情况下，滚筒2的转速会维持规定时间，因此与每次都停止滚筒2的旋转的情况相比，提高了洗衣机1的运转效率。
＜步骤S310＞
步骤S310中，控制部50根据步骤S309中将滚筒2的转速维持规定时间之后的来自加速度传感器12的加速度信号，计算出加速度传感器12的加速度输出。加速度输出的计算方法与步骤S303相同。
＜步骤S311＞
步骤S311中，控制部50对步骤S309中将滚筒2的转速维持规定时间之后的马达10的电流值进行检测，计算出马达输出。马达输出的计算方法与步骤S304相同。
＜步骤S312＞
步骤S312中，控制部50根据步骤S310、S311中计算出的加速度输出和马达输出，判定加速度输出减去马达输出所得的输出差是否为第二阈值以上。在输出差为第二阈值以上的情况下(S312：是)，判定为滚筒2与外筒3之间残留有水的状态已消除，进入步骤S306，控制部50使滚筒2的转速上升，加速脱水。在输出差小于第二阈值的情况下(S312：否)，判定为滚筒2与外筒3之间残留有水的状态未被消除，移至步骤S309，控制部50继续将滚筒2的转速维持规定时间的状态。
即，在本实施方式的洗衣机1中，在判定为无法提高滚筒的转速之后，当输出差即加速度传感器12的输出减去马达10的输出所得的第一输出差达到第二阈值以上时，作为判定单元的脱水加速判定部54判定为能提高滚筒2的转速。
由此，本实施方式的洗衣机1设置为：根据加速度传感器12的输出减去马 达10的输出所得的输出差为第二阈值以上这一情况，检测出滚筒2与外筒3之间残留有水的状态已消除，使滚筒2的转速上升。因此，能在滚筒2与外筒3之间残留有水的状态已消除时使滚筒2的转速上升，加速脱水。
在本实施方式的洗衣机1中，第二阈值大于第一阈值。由此，本实施方式的洗衣机1中，用于检测出滚筒2与外筒3之间残留有水的状态已消除的第二阈值大于用于检测出处于滚筒2与外筒3之间残留有水的状态的第一阈值，所以能在滚筒2与外筒3之间残留有水的状态确实已消除时使滚筒2的转速上升，加速脱水。
(第二实施方式)
根据图8和图9对本发明的第二实施方式进行详细说明。
本实施方式的洗衣机与第一实施方式的洗衣机1的主要的不同点在于，第一实施方式中，根据加速度输出减去马达输出所得的输出差来判定是否加速脱水，与此相对，本实施方式中，根据加速度输出除以马达输出所得的输出比来判定是否加速脱水。对于本实施方式的洗衣机的结构中与第一实施方式的洗衣机1相同的结构省略说明。
如图8所示，本实施方式的洗衣机的控制部150具有：马达输出计算部51、加速度输出计算部52、输出比计算部153、脱水加速判定部154、故障判定部55以及马达控制部56。
输出比计算部153对由加速度输出计算部52计算出的加速度输出除以由马达输出计算部51计算出的马达输出所得的输出比(加速度输出/马达输出)进行计算。在本实施方式中，与第一实施方式相同，马达输出和加速度输出被数字化为微机值，因此以微机值的比的形式计算输出比。
在脱水过程中滚筒2的转速达到规定转速以上之后，在加速度输出除以马达输出所得输出比为第一阈值以上的情况下，脱水加速判定部154判定为不处于滚筒2与外筒3之间残留有水的状态，能提高滚筒2的转速。此外，在加速度输出除以马达输出所得的输出比小于第一阈值的情况下，脱水加速判定部154判定为处于滚筒与外筒之间残留有水的状态，无法提高滚筒2的转速。需要说明的是，第一阈值能表现为滚筒2的转速的一次函数的连续，但斜率、截距随 着转速的变化而变化，或者作为表格存储在RAM内。
此外，在加速度输出除以马达输出所得的输出比小于第一阈值而判定为无法提高滚筒2的转速之后，当加速度输出除以马达输出所得的输出比达到第二阈值以上时，脱水加速判定部154判定为滚筒2与外筒3之间残留有水的状态已消除，能提高滚筒2的转速。在本实施方式中，第二阈值是大于第一阈值的值。
即，本实施方式的洗衣机具备：有底筒状的滚筒2，设置为能绕轴线旋转；马达10，经由从滚筒2的底部突出的驱动轴17对滚筒2进行旋转驱动；加速度传感器12，检测滚筒2的加速度；作为判定单元的脱水加速判定部154，在脱水过程中滚筒2的转速达到规定转速以上之后，在输出比即加速度传感器12的输出除以马达10的输出所得的第一输出比小于第一阈值的情况下，判定为无法提高滚筒2的转速；以及作为控制单元的马达控制部56，根据脱水加速判定部154作出的判定控制马达10。
由此，本实施方式的洗衣机设置为：根据加速度传感器12的输出除以马达10的输出所得的输出比小于第一阈值这一情况，检测出处于滚筒2与外筒3之间残留有水的状态，不提高滚筒2的转速。因此，能防止在滚筒2与外筒3之间残留有水的状态下使滚筒2旋转而导致产生异常声。
接着，对于本实施方式的洗衣机的脱水过程的动作，根据图9进行说明。图9的步骤S401～S404的说明与图7的步骤S301～S304的说明相同，因而省略该说明。
＜步骤S405＞
在步骤S405中，控制部150判定加速度输出除以马达输出所得的输出比是否小于第一阈值以上。
＜步骤S406＞
步骤S405中，在加速度输出除以马达输出所得的输出比是第一阈值以上的情况下(S405：否)，进入步骤S406，控制部150使滚筒2的转速上升，加速脱水。步骤S406中，控制部150使滚筒2的转速以对应于当前时刻的滚筒2的转速的规定上升速度上升，当经过规定的上升时间时，进入步骤S407。
＜步骤S407、S408＞
步骤S407中，判定滚筒2的转速是否达到了目标转速。在滚筒2的转速达到了目标转速的情况下(S407：是)，步骤S408中，控制部150继续脱水过程，在经过了预定的规定脱水时间之后，结束脱水过程。步骤S407中，在滚筒2的转速没有达到目标转速的情况下(S407：否)，移至步骤S403。
＜步骤S409＞
步骤S405中，在加速度输出除以马达输出所得的输出比小于第一阈值的情况下(S405：是)，进入步骤S409。步骤S409中，因为加速度输出除以马达输出所得的输出比小于第一阈值，所以处于滚筒2与外筒3之间残留有水的状态，控制部150停止加速脱水，将滚筒2的转速维持规定时间。有时，通过在将滚筒2的转速维持规定时间的状态下继续运转，在滚筒2与外筒3之间水被排出，消除滚筒2与外筒3之间残留有水的状态。之后，进入步骤S410。
即，在本实施方式的洗衣机中，在通过脱水加速判定部154判定为无法提高滚筒2的转速的情况下，马达控制部56控制马达10维持滚筒2的转速。
由此，本实施方式的洗衣机中，在通过脱水加速判定部154判定为无法提高滚筒2的转速的情况下，滚筒2的转速会维持规定时间，因此与每次都停止滚筒2的旋转的情况相比，提高了洗衣机1的运转效率。
＜步骤S410＞
步骤410中，控制部150根据步骤S409中将滚筒2的转速维持规定时间之后的来自加速度传感器12的加速度信号，计算出加速度传感器12的加速度输出。加速度输出的计算方法与步骤S403相同。
＜步骤S411＞
步骤S411中，控制部150对步骤S409中将滚筒2的转速维持规定时间之后的马达10的电流值进行检测，计算出马达输出。马达输出的计算方法与步骤S404相同。
＜步骤S412＞
步骤S412中，控制部150根据步骤S410、S411中计算出的加速度输出和 马达输出，判定加速度输出除以马达输出所得的输出比是否为第二阈值以上。步骤S412中，在加速度输出除以马达输出所得的输出比为第二阈值以上的情况下(S412：是)，判定为滚筒2与外筒3之间残留有水的状态已消除，进入步骤S406，控制部150使滚筒2的转速上升，加速脱水。步骤S412中，在加速度输出除以马达输出所得的输出比小于第二阈值的情况下(S412：否)，控制部150判定为滚筒2与外筒3之间残留有水的状态未被消除，移至步骤S409，继续将滚筒2的转速维持规定时间的状态。
即，在本实施方式的洗衣机中，在加速度输出除以马达输出所得的输出比达到第二阈值以上时，作为判定单元的脱水加速判定部154判定为能提高滚筒2的转速。
由此，本实施方式的洗衣机设置为：根据加速度传感器12的输出除以马达10的输出所得的输出比为第二阈值以上这一情况，检测出滚筒2与外筒3之间残留有水的状态已消除，使滚筒2的转速上升。因此，能在滚筒2与外筒3之间残留有水的状态已消除时使滚筒2的转速上升，加速脱水。
(第三实施方式)
根据图10和图11对本发明的第三实施方式进行详细说明。
本实施方式的洗衣机与第一实施方式的洗衣机主要的不同点在于，第一实施方式中，根据加速度输出减去马达输出所得的输出差来判定是否加速脱水，与此相对，本实施方式中，通过分别进行对马达输出的判定和对加速度输出的判定来判定是否加速脱水。对于本实施方式的洗衣机的结构中与第一实施方式的洗衣机1相同的结构省略说明。
如图10所示，本实施方式的洗衣机的控制部250具有：马达输出计算部51、加速度输出计算部52、脱水加速判定部254、故障判定部55以及马达控制部56。
在脱水过程中滚筒2的转速达到规定转速以上之后，在马达输出小于马达阈值的状态下且加速度输出小于加速度阈值的情况下，脱水加速判定部254判定为滚筒2的振动较小且处于滚筒2与外筒3之间不残留有水的状态，能提高滚筒2的转速。此外，在马达输出为马达阈值以上且加速度输出小于加速度阈值的情况下，即使滚筒2的振动较小，脱水加速判定部254也判定为处于滚筒 与外筒之间残留有水的状态，无法提高滚筒2的转速。
此外，在根据马达输出为马达阈值以上且加速度输出小于加速度阈值而判定为无法提高滚筒2的转速之后，在加速度输出小于加速度阈值的状态下，当马达输出变得小于马达阈值时，脱水加速判定部254判定为滚筒2与外筒3之间残留有水的状态已消除，能提高滚筒2的转速。
此外，在加速度输出为加速度阈值以上的情况下，因为滚筒2的振动较大，所以脱水加速判定部254判定为无法提高滚筒2的转速。
即，本实施方式的洗衣机具备：有底筒状的滚筒2，设置为能绕轴线旋转；马达10，经由从滚筒2的底部突出的驱动轴17对滚筒2进行旋转驱动；加速度传感器12，检测滚筒2的加速度；作为判定单元的脱水加速判定部254，在脱水过程中滚筒2的转速达到规定转速以上之后，在马达10的输出为马达阈值以上且加速度传感器12的输出小于加速度阈值的情况下，判定为无法提高滚筒2的转速；以及作为控制单元的马达控制部56，根据脱水加速判定部254作出的判定控制马达10。
由此，本实施方式的洗衣机设置为：根据马达10的输出为马达阈值以上且加速度传感器12的输出小于加速度阈值这一情况，检测出处于滚筒2与外筒3之间残留有水的状态，不提高滚筒2的转速。因此，能防止在脱水过程中在滚筒2与外筒3之间残留有水的状态下使滚筒2旋转而导致产生异常声。
接着，对于本实施方式的洗衣机的脱水过程的动作，根据图11进行说明。图11的步骤S501～S504的说明与图7的步骤S301～S304的说明相同，因而省略该说明。
＜步骤S505、S506、S507＞
步骤S505中，控制部250判定马达输出是否小于马达阈值。在马达输出小于马达阈值的情况下(S505：是)，进入步骤S506，判定加速度输出是否小于加速度阈值。步骤S506中，在加速度输出小于加速度阈值的情况下(S506：是)，进入步骤S507，使滚筒2的转速上升，加速脱水。步骤S507中，控制部250使滚筒2的转速以对应于当前时刻的滚筒2的转速的规定上升速度上升，当经过规定的上升时间时，进入步骤S508。
＜步骤S508、S509＞
步骤S508中，判定滚筒2的转速是否达到了目标转速。在滚筒2的转速达到了目标转速的情况下(S508：是)，步骤S509中，控制部250继续脱水过程，在经过了预定的规定脱水时间之后，结束脱水过程。步骤S508中，在滚筒2的转速没有达到目标转速的情况下(S508：否)，移至步骤S503。
＜步骤S510＞
步骤S506中，在加速度输出为加速度阈值以上的情况下(S506：否)，因为洗涤物的偏置大，所以进入步骤S510，停止脱水。
即，本实施方式的洗衣机中，在加速度输出是加速度阈值以上的情况下，判定单元254判定为停止滚筒2的旋转。
由此，本实施方式的洗衣机设置为：根据加速度传感器12的输出为加速度阈值以上这一情况，检测出洗涤物的偏置大，不提高滚筒2的转速。因此，能防止在脱水过程中在洗涤物的偏置大的状态下使滚筒2的转速上升而产生导致振动、噪声。
＜步骤S511、S512＞
步骤S505中，在马达输出为马达阈值以上的情况下(S505：否)，进入步骤S511，判定加速度输出是否小于加速度阈值。在加速度输出小于加速度阈值的情况下(S511：是)，判定为处于滚筒2与外筒3之间残留有水的状态，进入步骤S512，停止加速脱水，将滚筒2的转速维持规定时间。有时，通过在将滚筒2的转速维持规定时间的状态下继续运转，在滚筒2与外筒3之间水被排出，消除滚筒2与外筒3之间残留有水的状态。步骤S511中，在加速度输出为加速度阈值以上的情况下(S511：否)，因为洗涤物的偏置大，所以进入步骤S510，停止脱水。
即，本实施方式的洗衣机中，在通过脱水加速判定部254判定为无法提高滚筒2的转速的情况下，马达控制部56控制马达10使得滚筒2的转速维持规定时间。
由此，本实施方式的洗衣机中，在通过脱水加速判定部254判定为无法提高滚筒2的转速的情况下，滚筒2的转速会维持规定时间，所以与每次都停止 滚筒2的旋转的情况相比，提高了洗衣机的运转效率。
＜步骤S513＞
步骤S513中，控制部250根据来自在步骤S512中将滚筒2的转速维持规定时间后的加速度传感器12的加速度信号，计算出加速度传感器12的加速度输出。加速度输出的计算方法与步骤S503相同。
＜步骤S514、S515＞
步骤S514中，控制部250判定步骤S513中计算出的加速度输出是否小于加速度阈值。在加速度输出小于加速度阈值的情况下(S514：是)，步骤S515中，控制部250对在步骤S512中将滚筒2的转速维持规定时间之后的马达10的电流值进行检测，计算出马达输出。马达输出的计算方法与步骤S504相同。步骤S514中，在加速度输出为加速度阈值以上的情况下(S514：否)，因为洗涤物的偏置大，所以进入步骤S510，停止脱水。
＜步骤S516＞
步骤S516中，控制部250判定步骤S515中计算出的马达输出是否小于马达阈值。在马达输出小于马达阈值的情况下(S516：是)，判定为滚筒2与外筒3之间残留有水的状态已消除，进入步骤S507，使滚筒2的转速上升，加速脱水。步骤S516中，在马达输出为马达阈值以上的情况下(S516：否)，控制部250判定为滚筒2与外筒3之间残留有水的状态未被消除，移至步骤S512，继续将滚筒2的转速维持规定时间的状态。
即，本实施方式的洗衣机中，在判定为无法提高滚筒的转速之后，在加速度传感器12的输出小于加速度阈值的状态下，当马达10的输出变得小于马达阈值时，作为判定单元的脱水加速判定部254判定为能提高滚筒2的转速。
由此，本实施方式的洗衣机设置为：根据在加速度传感器12的输出小于加速度阈值的状态下马达10的输出变得小于马达阈值这一情况，检测出滚筒2与外筒3之间残留有水的状态已消除，使滚筒2的转速上升。因此，能在滚筒2与外筒3之间残留有水的状态已消除时使滚筒2的转速上升，加速脱水。
以上，对本发明的实施方式进行了说明，但各部分的具体结构不局限于上述的实施方式。
例如，上述实施方式中，在通过脱水加速判定部判定为无法提高滚筒2的转速的情况下，控制马达10使得滚筒2维持转速，但是也可以控制马达10使得滚筒2的转速减少。上述实施方式中，第一阈值和第二阈值是不同的值，但是第一阈值和第二阈值也可以相同。上述第三实施方式中，在加速度传感器的输出为加速度阈值以上的情况下，通过脱水加速判定单元254判定洗涤物的偏置大而停止脱水，但是也可以维持滚筒2的转速，还可以降低滚筒2的转速。
上述实施方式中，马达输出计算部51对当前时刻的马达10的电流值与滚筒2的转速为400rpm时的马达10的电流值之差进行了计算，但是马达输出计算部51计算马达输出的方法不局限于此。例如，马达输出计算部51可以对当前时刻的马达10的电流值与滚筒2的转速为400rpm之外的转速时的马达10的电流值之差进行计算。
上述实施方式中，滚筒2设置为能绕沿水平方向延伸的轴线旋转，但是滚筒2也可以设置为能绕沿倾斜方向(与垂直方向倾斜的方向)延伸的轴线旋转。此外，滚筒2还可以设置为能绕沿垂直方向延伸的轴线旋转。
上述第一实施方式中，判定单元54根据加速度传感器12的输出减去马达10的输出所得的第一输出差来判定是否要提高滚筒2的转速，但是判定单元54也可以根据马达10的输出减去加速度传感器12的输出所得的第二输出差来判定是否要提高滚筒2的转速。需要说明的是，在根据第一输出差进行判定的情况和根据第二输出差进行判定的情况下，第一阈值和第二阈值被设定为各不相同的值。上述第二实施方式中，判定单元154根据加速度传感器12的输出除以马达10的输出所得的第一输出比来判定是否要提高滚筒2的转速，但是判定单元154也可以根据马达10的输出除以加速度传感器12的输出所得的第二输出比来判定是否要提高滚筒2的转速。需要说明的是，在根据第一输出比进行判定的情况和根据第二输出比进行判定的情况下，第一阈值和第二阈值被设定为各不相同的值。
其他的结构也可以在不脱离本发明的技术精神的范围内进行各种变形。

Claims (11)

  1. 一种洗衣机，其特征在于，具备：
    有底筒状的滚筒，设置为能绕轴线旋转；
    马达，经由从所述滚筒的底部突出的驱动轴对所述滚筒进行旋转驱动；
    加速度传感器，检测所述滚筒的加速度；
    判定单元，在脱水过程中所述滚筒的转速达到规定转速以上之后，在所述加速度传感器的输出减去所述马达的输出所得的第一输出差小于第一阈值的情况、或者所述马达的输出减去所述加速度传感器的输出所得的第二输出差为第一阈值以上的情况下，判定为无法提高所述滚筒的转速；以及
    控制单元，根据所述判定单元作出的判定控制所述马达。
  2. 根据权利要求1所述的洗衣机，其特征在于，
    在判定为无法提高所述滚筒的转速之后，当所述第一输出差为第二阈值以上时、或者所述第二输出差小于第二阈值时，所述判定单元判定为能提高所述滚筒的转速。
  3. 根据权利要求2所述的洗衣机，其特征在于，
    对于所述第一输出差，所述第二阈值大于所述第一阈值，或者，对于所述第二输出差，所述第二阈值小于所述第一阈值。
  4. 一种洗衣机，其特征在于，具备：
    有底筒状的滚筒，设置为能绕轴线旋转；
    马达，经由从所述滚筒的底部突出的驱动轴对所述滚筒进行旋转驱动；
    加速度传感器，检测所述滚筒的加速度；
    判定单元，在脱水过程中所述滚筒的转速达到规定转速以上之后，在所述加速度传感器的输出除以所述马达的输出所得的第一输出比 小于第一阈值的情况、或者所述马达的输出除以所述加速度传感器的输出所得的第二输出比为第一阈值以上的情况下，判定为无法提高所述滚筒的转速，以及
    控制单元，根据所述判定单元作出的判定控制所述马达。
  5. 根据权利要求4所述的洗衣机，其特征在于，
    在判定为无法提高所述滚筒的转速之后，当所述第一输出比为第二阈值以上时、或者所述第二输出比小于第二阈值时，所述判定单元判定为能提高所述滚筒的转速。
  6. 根据权利要求5所述的洗衣机，其特征在于，
    对于所述第一输出比，所述第二阈值大于所述第一阈值，或者，对于所述第二输出比，所述第二阈值小于所述第一阈值。
  7. 一种洗衣机，其特征在于，
    有底筒状的滚筒，设置为能绕轴线旋转；
    马达，经由从所述滚筒的底部突出的驱动轴对所述滚筒进行旋转驱动；
    加速度传感器，检测所述滚筒的加速度；
    判定单元，在脱水过程中所述滚筒的转速达到规定转速以上之后，在所述马达的输出为马达阈值以上且所述加速度传感器的输出小于加速度阈值的情况下，判定为无法提高所述滚筒的转速；以及
    控制单元，根据所述判定单元作出的判定控制所述马达。
  8. 根据权利要求7所述的洗衣机，其特征在于，
    在判定为无法提高所述滚筒的转速之后，在所述加速度传感器的输出小于加速度阈值的状态下，当所述马达的输出小于马达阈值时，所述判定单元判定为能提高所述滚筒的转速。
  9. 根据权利要求7或8所述的洗衣机，其特征在于，
    在所述加速度传感器的输出为加速度阈值以上的情况下，所述判定单元判定为无法提高所述滚筒的转速或停止所述滚筒的旋转。
  10. 根据权利要求1～9中任一项所述的洗衣机，其特征在于，
    在通过所述判定单元判定为无法提高所述滚筒的转速的情况下，所述控制单元控制所述马达使得所述滚筒的转速维持规定时间。
  11. 根据权利要求1～10中任一项所述的洗衣机，其特征在于，
    在所述加速度传感器的输出在所述滚筒的转速上升时不变化的情况下，所述判定单元判定为无法提高所述滚筒的转速。
PCT/CN2019/095561 2018-07-13 2019-07-11 洗衣机 Ceased WO2020011225A1 (zh)

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