WO2016188437A1 - 脱水机 - Google Patents

脱水机 Download PDF

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Publication number
WO2016188437A1
WO2016188437A1 PCT/CN2016/083395 CN2016083395W WO2016188437A1 WO 2016188437 A1 WO2016188437 A1 WO 2016188437A1 CN 2016083395 W CN2016083395 W CN 2016083395W WO 2016188437 A1 WO2016188437 A1 WO 2016188437A1
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WO
WIPO (PCT)
Prior art keywords
laundry
duty ratio
motor
control unit
detection
Prior art date
Application number
PCT/CN2016/083395
Other languages
English (en)
French (fr)
Chinese (zh)
Inventor
川口智也
佐藤弘树
Original Assignee
海尔亚洲株式会社
青岛海尔洗衣机有限公司
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
Priority claimed from JP2015106538A external-priority patent/JP6350874B2/ja
Application filed by 海尔亚洲株式会社, 青岛海尔洗衣机有限公司 filed Critical 海尔亚洲株式会社
Priority to US15/576,592 priority Critical patent/US20180155862A1/en
Priority to KR1020177037320A priority patent/KR102005360B1/ko
Priority to EP16799324.5A priority patent/EP3305959A4/de
Priority to CN201680028339.XA priority patent/CN107709650B/zh
Publication of WO2016188437A1 publication Critical patent/WO2016188437A1/zh

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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
    • D06F23/00—Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement, the receptacle serving both for washing and for centrifugally separating water from the laundry 
    • D06F23/04—Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement, the receptacle serving both for washing and for centrifugally separating water from the laundry  and rotating or oscillating about a vertical axis
    • 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
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/14—Arrangements for detecting or measuring specific parameters
    • D06F34/16—Imbalance
    • 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
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/02—Characteristics of laundry or load
    • D06F2103/04—Quantity, e.g. weight or variation of weight
    • 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
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/26—Imbalance; Noise level
    • 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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/46—Drum speed; Actuation of motors, e.g. starting or interrupting
    • 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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/62—Stopping or disabling machine operation
    • 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
    • D06F35/00—Washing machines, apparatus, or methods not otherwise provided for
    • D06F35/005—Methods for washing, rinsing or spin-drying
    • D06F35/007—Methods for washing, rinsing or spin-drying for spin-drying only
    • 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
    • D06F49/00—Domestic spin-dryers or similar spin-dryers not suitable for industrial use

Definitions

  • the invention relates to a dehydrator.
  • Patent Document 1 listed below discloses a washing machine having a dehydrating function.
  • the motor that rotates the washing and dewatering tub in which the laundry is stored is rotated at a constant speed of 120 rpm by controlling the duty ratio of the applied voltage, and then rotated at a constant speed of 240 rpm. Rotate at a constant speed of 800 rpm.
  • the duty ratio at the time point of 3.6 seconds after the rotation speed of the motor was accelerated from 120 rpm to 240 rpm was taken as the reference duty ratio.
  • a target value related to the duty ratio that changes with time in a state where the motor rotates at a constant speed of 240 rpm is obtained as a comparison duty ratio based on the reference duty ratio.
  • Patent Document 1 Japanese Laid-Open Patent Publication No. 2011-240040
  • the washing machine of Patent Document 1 judges that the rotational speed of the motor reaches 240 rpm at a time point of 3.6 seconds after the rotational speed of the motor starts to accelerate from 120 rpm to 240 rpm, and the duty ratio at this time point is regarded as the reference duty ratio.
  • the reference duty ratio is an important factor in the detection accuracy of whether or not the laundry is biased.
  • the duty ratio is not considered, and the duty ratio at the time point of 3.6 seconds from the start of acceleration of the motor is uniformly regarded as the reference duty ratio. Therefore, when the reference duty ratio is a duty ratio obtained at a timing deviated from the correct timing due to the influence of the load amount, there is a possibility that the detection accuracy of the laundry may be adversely affected.
  • the problem that is always solved is to shorten the time of the dehydration operation.
  • the present invention has been made in view of the background, and an object thereof is to provide a dehydrator capable of improving the detection accuracy of whether or not a laundry is biased.
  • the present invention is a dewatering machine, comprising: a dewatering bucket for containing laundry, rotating to dehydrate the laundry; an electric motor to rotate the dewatering bucket; and a load measuring unit when the dewatering bucket starts At the time of rotation, the load amount of the laundry in the dewatering tub is measured; and the drive control unit controls the duty ratio of the voltage applied to the motor after the load amount is measured by the load amount measuring unit.
  • the motor rotates at a constant speed at a first rotational speed, and then the motor is rotated at a second rotational speed higher than the first rotational speed to cause the laundry to be officially dehydrated;
  • the acquisition unit is to be in the motor a duty ratio of a voltage applied to the motor in an acceleration state accelerated to the first rotational speed is taken as a reference duty ratio; and a timing determining unit determines a timing at which the acquisition unit acquires the reference duty ratio;
  • the determining unit after the obtaining unit acquires the reference duty ratio, is based on the electric power applied to the motor to maintain the first rotational speed for a predetermined period of time Determining whether or not the laundry in the dewatering bucket is biased with respect to an index of a change in the duty ratio; and stopping the control unit, determining that there is a bias of the laundry in the determining unit Lowering the rotation of the dewatering tub, the timing determining unit detecting the load according to the load amount measuring unit The amount of load determines a timing at which the acquisition unit acquire
  • the present invention is characterized in that it includes an execution unit that selectively performs dehydration for restarting dehydration of laundry according to the index in a case where the stop control unit stops rotation of the dewatering tub The rotation of the tub and the process of correcting the bias of the laundry in the dewatering tub.
  • the present invention is characterized in that the drive control unit causes the motor to rotate at a constant speed lower than a predetermined speed lower than the first rotation speed before the motor is rotated at a constant speed at the first rotation speed,
  • the execution unit shortens a length of time at which the motor is rotated at a constant speed at the predetermined speed in a case where rotation of the dewatering tub for restarting dehydration of the laundry is performed.
  • the dehydrator of the present invention is characterized by comprising: a dewatering tub for containing laundry, rotating to dehydrate the laundry; an electric motor for rotating the dewatering tub; and a drive control unit for applying the motor to the motor a duty ratio of the voltage, causing the motor to rotate at a constant speed at a first rotational speed, and then rotating the motor at a second rotational speed higher than the first rotational speed to formally dehydrate the laundry;
  • the acquisition unit acquires the duty ratio once every predetermined timing for a predetermined period of time after the motor starts to accelerate to the first rotation speed; and the counting unit obtains a duty ratio greater than that obtained by the acquisition unit When the duty ratio obtained last time is equal to 1, the count value whose initial value is zero is incremented by one, and when the duty ratio obtained by the acquisition unit is smaller than the duty ratio obtained last time, the count value is reset to The initial value; the determining unit, when the count value is greater than or equal to a predetermined threshold, determining that there is a bias of the laundry in
  • the present invention is a dehydrator characterized by comprising: a dewatering tub for containing laundry, rotating to dehydrate the laundry; an electric motor for rotating the dewatering tub; and a drive control unit for controlling the a duty ratio of a voltage applied by the motor, causing the motor to rotate at a constant speed at a first rotational speed, and then rotating the motor at a second rotational speed higher than the first rotational speed to make the laundry officially a dehydrating unit that acquires the duty ratio every predetermined timing during a period in which the rotational speed of the motor is from the first rotational speed to the second rotational speed; the determining unit, when the obtaining When the duty ratio obtained by the unit is greater than or equal to a predetermined threshold, determining that there is a bias of the laundry in the dewatering bucket; stopping the control unit, and causing the dehydration if the determining unit determines that there is a bias of the laundry The rotation of the tub is stopped; the receiving unit receives a selection related to the dehydration condition of the motor
  • the present invention is a dehydrator characterized by comprising: a dewatering tub for containing laundry, rotating to dehydrate the laundry; an electric motor for rotating the dewatering tub; and a drive control unit for controlling the a duty ratio of a voltage applied by the motor, causing the motor to rotate at a constant speed at a first rotational speed, and then rotating the motor at a second rotational speed higher than the first rotational speed to make the laundry officially a dehydration unit that takes a maximum value of the duty ratio in an acceleration state in which the motor is accelerated to the first rotation speed, and a calculation unit that obtains the maximum value in the acquisition unit After the duty ratio, calculating an integrated value of the difference between the duty ratio and the maximum duty ratio per predetermined time; and determining, when the accumulated value is less than a predetermined threshold, determining that the dewatering bucket exists a bias of the laundry; and a stop control unit that stops the rotation of the dewatering tub when the judging unit judges that there is a bias of the laundry.
  • the present invention is characterized in that the threshold value is obtained by an equation in which a count value and the maximum duty ratio are variables, wherein the count value is incremented once every predetermined time.
  • the present invention is characterized in that the drive control unit controls the duty ratio in such a manner that the rotation speed resonates with the dehydration barrel in an acceleration state in which the motor is accelerated to the first rotation speed
  • the maximum duty cycle is generated when the rotational speed is slightly lower.
  • the motor is rotated at a constant speed at the first rotation speed by controlling the duty ratio of the voltage applied to the electric motor that rotates the dehydration tub, and then the motor is made to rotate at a higher speed than the first rotation speed.
  • the high second rotation speed is rotated at a constant speed, whereby the laundry in the dewatering tank is officially dehydrated.
  • the reference duty ratio is obtained by the acquisition unit in the acceleration state until the motor accelerates to the first rotation speed. Then, after the acquisition unit acquires the reference duty ratio, the index indicating a change in the duty ratio of the voltage applied to the motor to maintain the first rotation speed with respect to the reference duty ratio is changed within a predetermined period of time. Determine whether the laundry in the dewatering bucket is biased. In the case where it is judged that there is a bias of the laundry, the rotation of the dewatering tub is stopped.
  • the timing determining means determines the timing at which the acquiring means obtains the reference duty ratio based on the measured load amount.
  • the refreshing is performed based on the index indicating that the duty ratio changes with respect to the reference duty ratio.
  • the process of correcting the bias of the laundry is not always performed. Therefore, when the index is an index indicating that the deviation of the laundry is small, the dewatering tub is immediately rotated to restart the dehydration, whereby the time for realizing the dehydration operation is shortened.
  • the step is The length of time is shortened, so that the time for the dehydration operation is further shortened.
  • the motor is rotated at a constant speed at the first rotational speed, and then the motor is made A second rotation speed having a high rotation speed is rotated at a constant speed, whereby the laundry in the dewatering tank is officially dehydrated.
  • the duty ratio is obtained every predetermined timing for a predetermined period, and each duty ratio is on The duty ratios obtained at one time are compared. Specifically, when the obtained duty ratio is greater than or equal to the duty ratio obtained last time, the count value whose initial value is zero is incremented by one, and when the obtained duty ratio is smaller than the duty ratio obtained last time, the count is counted. The value is reset to the initial value.
  • the motor is rotated at a constant speed at the first rotation speed by controlling the duty ratio of the voltage applied to the electric motor that rotates the dehydration tub, and then, the electric power is made.
  • the machine rotates at a constant speed at a second rotation speed higher than the first rotation speed, whereby the laundry in the dewatering tank is officially dehydrated.
  • the duty ratio is obtained once every predetermined timing during the period from the first rotation speed to the second rotation speed of the rotation speed of the motor.
  • the duty ratio is greater than or equal to a predetermined threshold, it is determined that there is a bias of the laundry in the dewatering bucket, and the rotation of the dewatering bucket is stopped.
  • the dehydrator can receive a selection relating to the dehydration condition of the laundry by the receiving unit, and can change the threshold according to the received dehydration condition. Therefore, since it is possible to detect whether or not the laundry is biased by the threshold value appropriate for each dehydration condition in the dehydration operation under each dehydration condition, the detection accuracy of the presence or absence of the laundry can be improved.
  • the motor is rotated at a constant speed at the first rotational speed by controlling the duty ratio of the voltage applied to the electric motor that rotates the dewatering tub, and then the motor is made to be the first
  • the second rotational speed at which the rotational speed is high is rotated at a constant speed, whereby the laundry in the dewatering tub is officially dehydrated.
  • the maximum value of the duty ratio in the acceleration state until the motor is accelerated to the first rotational speed is taken as the maximum duty ratio, and then the maximum duty is calculated.
  • the cumulative value of the difference from the duty ratio per predetermined time is taken as the maximum duty ratio, and then the maximum duty is calculated.
  • the threshold value is incremented by one count value and maximum duty ratio every predetermined time. It is obtained as a formula of a variable.
  • the maximum duty ratio differs depending on the amount of load of the laundry in the dewatering tub. Therefore, the threshold value is set differently depending on the amount of load.
  • the duty ratio is set to generate a maximum duty ratio at a rotational speed slightly lower than the rotational speed at which the dewatering barrel resonates. At this time, resonance occurs early after the maximum duty ratio is generated. Therefore, it is very fast that the cumulative value is difficult to increase. Therefore, the bias of the laundry in the dewatering bucket can be detected early and correctly.
  • Fig. 1 is a schematic longitudinal cross-sectional right side view showing a dehydrator 1 according to an embodiment of the present invention.
  • FIG. 2 is a block diagram showing the electrical configuration of the dehydrator 1.
  • FIG. 3 is a timing chart showing a state of the number of revolutions of the motor 6 in the spin-drying operation performed by the dehydrator 1.
  • FIG. 5A is a flowchart showing an outline of detection 1 to detection 4 for detecting whether or not the laundry in the dewatering tank 4 is biased during the dehydrating operation.
  • FIG. 5B is a flowchart showing an outline of detection 1 to detection 4 for detecting whether or not the laundry in the dewatering tank 4 is biased during the dehydrating operation.
  • FIG. 6A is a flowchart showing the related control operations of the detection 1 and the detection 2.
  • FIG. 6B is a flowchart showing the related control operations of the detection 1 and the detection 2.
  • FIG. 7 is a graph showing the relationship between the rotational speed of the motor 6 and the rotational speed Sn in association with the detection 1.
  • FIG. 8 is a graph showing the relationship between the number of revolutions of the motor 6 and the cumulative value U of the absolute value of the difference with respect to the difference S in association with the detection 2.
  • FIG. 9A is a flowchart showing the related control operations of the detection 3 and the detection 4.
  • FIG. 9B is a flowchart showing the related control operations of the detection 3 and the detection 4.
  • FIG. 10 is a graph showing the relationship between time and the first count value E in association with the detection 3.
  • FIG. 11 is a graph showing the relationship between the time and the corrected duty ratio dn_diff in association with the detection 4.
  • FIG. 12 is a flowchart showing an outline of detection 5-1 and detection 5-2 for detecting whether or not the laundry in the dewatering tank 4 is biased during the dehydrating operation.
  • Fig. 13 is a flowchart showing the related control operation of the detection 5-1.
  • FIG. 14 is a graph showing the relationship between the rotational speed and the movement cumulative value Cn in association with the detection 5-1 and the detection 5-2.
  • Fig. 15 is a flowchart showing the related control operation of the detection 5-2.
  • Fig. 16 is a flow chart showing a control operation for detecting a bubble during a dehydrating operation.
  • FIG. 17 is a timing chart showing a state of the number of revolutions of the motor 6 in the middle of the dehydration operation by the dehydrator 1 in association with the detection 6.
  • FIG. 18 is a flowchart showing the related control operation of the detection 6.
  • FIG. 19 is a graph showing the relationship between the count value G and the cumulative value H in association with the detection 6.
  • FIG. 20 is a graph showing the relationship between the count value G and the duty ratio in association with the detection 6.
  • Fig. 1 is a schematic longitudinal sectional right side view of a dehydrator 1 according to an embodiment of the present invention.
  • the vertical direction of FIG. 1 is referred to as the vertical direction X of the dehydrator 1, and the horizontal direction of FIG. 1 is referred to as the front-rear direction Y of the dehydrator 1.
  • the upper side is referred to as an upper X1
  • the lower side is referred to as a lower X2.
  • the left side in Fig. 1 is called In the front Y1
  • the right side in Fig. 1 is referred to as the rear Y2.
  • the dehydrator 1 includes all means capable of performing the dehydration operation of the laundry Q. Therefore, the dehydrator 1 includes not only a device having only a dehydrating function but also a washing machine having a dehydrating function and a washer-dryer. Hereinafter, the dehydrator 1 will be described by taking a washing machine as an example.
  • the dehydrator 1 includes a casing 2, an outer tub 3, a dewatering tub 4, a rotary wing 5, an electric motor 6, and a transmission mechanism 7.
  • the casing 2 is made of, for example, metal and formed in a box shape.
  • the upper surface 2A of the casing 2 is formed to be inclined with respect to the front-rear direction Y so as to extend upward toward the rear side X2.
  • An opening 8 that communicates with the inside and outside of the casing 2 is formed on the upper surface 2A.
  • a door 9 that opens and closes the opening 8 is provided on the upper surface 2A.
  • an operation portion 20 composed of a liquid crystal operation panel or the like is provided in a region further forward than the opening 8 by Y1.
  • the outer tub 3 is made of, for example, a resin, and is formed into a bottomed cylindrical shape.
  • the outer tub 3 includes a substantially cylindrical circumferential wall 3A disposed along the vertical direction X, a bottom wall 3B that blocks the hollow portion of the circumferential wall 3A from the lower side X2, and an annular annular wall 3C that surrounds the circumferential wall 3A.
  • the end edge on the upper X1 side is wrapped and protrudes toward the center side of the circumferential wall 3A.
  • An inlet and outlet 10 that communicates with the hollow portion of the circumferential wall 3A from the upper side X1 is formed inside the annular wall 3C.
  • the doorway 10 is in a state of being opposed to the opening 8 of the casing 2 from the lower side X2.
  • a door 11 that opens and closes the inlet and outlet 10 is provided in the annular wall 3C.
  • the bottom wall 3B is formed in a disk shape extending substantially horizontally, and a through hole 3D penetrating the bottom wall 3B is formed at a center position of the bottom wall 3B.
  • the outer tub 3 can store water.
  • the outer tub 3 is connected to a water supply path 12 connected to a tap of tap water from the upper side X1, and tap water is supplied from the water supply path 12 into the outer tub 3.
  • a water supply valve 13 that opens and closes to start or stop water supply is provided in the middle of the water supply path 12.
  • the outer tub 3 is connected to the drain passage 14 from the lower side X2, and the water in the outer tub 3 is discharged from the drain passage 14 to the outside of the washing machine.
  • a drain valve 15 that opens and closes to start or stop draining is provided in the middle of the drain passage 14.
  • the dewatering tub 4 is made of, for example, metal, and has a bottomed cylindrical shape that is smaller than the outer tub 3, and can accommodate the laundry Q therein.
  • the dewatering tub 4 has a substantially cylindrical circumferential wall 4A disposed along the vertical direction X and a bottom wall 4B that blocks the hollow portion of the circumferential wall 4A from the lower side X2.
  • the inner circumferential surface of the circumferential wall 4A is the inner circumferential surface of the dewatering tub 4.
  • the end portion is an inlet and outlet 21 that exposes the hollow portion of the circumferential wall 4A upward.
  • the entrance and exit 21 is opposed to the inlet and outlet 10 of the outer tub 3 from the lower side X2.
  • the entrances and exits 10 and 21 are opened and closed by the door 11.
  • the user of the dehydrator 1 takes out the laundry Q into the dewatering tub 4 via the opened opening 8, the inlets 10 and 21.
  • the dewatering tub 4 is housed in the outer tub 3 coaxially.
  • the dewatering tub 4 in a state of being housed in the outer tub 3 is rotatable about an axis 16 constituting a central axis thereof and extending in the vertical direction X.
  • a plurality of through holes are formed in the circumferential wall 4A and the bottom wall 4B of the dewatering tub 4, and water in the outer tub 3 can pass between the outer tub 3 and the dewatering tub 4 through the through holes. Therefore, the water level in the outer tub 3 coincides with the water level in the dewatering tub 4.
  • the bottom wall 4B of the dewatering tub 4 is formed in a disk shape extending substantially in parallel with respect to the bottom wall 3B of the outer tub 3 so as to extend upward in the vertical direction, and is formed in the bottom wall 4B at a center position coincident with the axis 16
  • the through hole 4C that penetrates the bottom wall 4B.
  • the bottom wall 4B is provided with a tubular support shaft 17 that surrounds the through hole 4C and extends downward along the axis 16 toward the lower side X2.
  • the support shaft 17 is inserted into the through hole 3D of the bottom wall 3B of the outer tub 3, and the lower end portion of the support shaft 17 is located below the bottom wall 3B by X2.
  • the rotary blade 5, that is, the pulsator, is formed in a disk shape centered on the axis 16 and is disposed concentrically with the dewatering tub 4 along the bottom wall 4B in the dewatering tub 4.
  • a plurality of blades 5A arranged radially are provided on the upper surface of the inlet/outlet 21 facing the dewatering tub 4.
  • the rotary wing 5 is provided with a rotary shaft 18 extending from its center along the axis 16 to the lower side X2.
  • the rotating shaft 18 is inserted through the hollow portion of the support shaft 17, and the lower end portion of the rotating shaft 18 is located below the bottom wall 3B of the outer tub 3 by X2.
  • the motor 6 is realized by a variable frequency motor.
  • the motor 6 is disposed in the casing 2 below the lower portion X2 of the outer tub 3.
  • the motor 6 has an output shaft 19 that rotates about the axis 16 .
  • the transmission mechanism 7 is interposed between the lower end portion of each of the support shaft 17 and the rotary shaft 18 and the upper end portion of the output shaft 19.
  • the transmission mechanism 7 selectively transmits the driving force output from the output shaft 19 of the motor 6 to one or both of the support shaft 17 and the rotation shaft 18.
  • a well-known transmission mechanism can be used as the transmission mechanism 7, a well-known transmission mechanism can be used.
  • the dewatering tub 4 and the rotary vane 5 rotate about the axis 16.
  • the laundry Q in the dewatering tub 4 is agitated by the rotating dewatering tub 4 and the blades 5A of the rotary wing 5.
  • the dewatering tub 4 and the rotary vane 5 are integrally rotated at a high speed, and the laundry Q in the dewatering tub 4 is dehydrated.
  • FIG. 2 is a block diagram showing the electrical configuration of the dehydrator 1.
  • the dehydrator 1 includes a load amount measuring unit, a drive control unit, an acquisition unit, a timing determination unit, a determination unit, a stop control unit, an execution unit, a counting unit, a receiving unit, a threshold value changing unit, and a control unit as a calculation unit.
  • the control unit 30 is configured, for example, as a microcomputer including a memory 32 such as a CPU 31, a ROM, or a RAM, a timer 35, and a counter 36, and is built in the casing 2 (see FIG. 1).
  • the dehydrator 1 further includes a water level sensor 33 and a rotational speed reading device 34.
  • the water level sensor 33 and the rotational speed reading device 34, and the motor 6, the transmission mechanism 7, the water supply valve 13, the drain valve 15, and the operation unit 20 described above are electrically connected to the control unit 30, respectively.
  • the water level sensor 33 is a sensor that detects the water level of the outer tub 3 and the dewatering tub 4, and the detection result of the water level sensor 33 is input to the control unit 30 in real time.
  • the rotational speed reading device 34 is a device that reads the rotational speed of the motor 6, and strictly reads the rotational speed of the output shaft 19 of the motor 6, and is constituted by, for example, a Hall IC.
  • the rotational speed read by the rotational speed reading device 34 is input to the control unit 30 in real time.
  • the control unit 30 controls the duty ratio of the voltage applied to the motor 6 based on the input rotational speed to rotate the motor 6 at a desired rotational speed.
  • the control unit 30 controls the transmission mechanism 7 to switch the transmission target of the driving force of the motor 6 to one or both of the support shaft 17 and the rotation shaft 18.
  • the control unit 30 controls opening and closing of the water supply valve 13 and the drain valve 15. As described above, when the user operates the operation unit 20 to select the dehydration condition or the like of the laundry Q, the control unit 30 receives the selection.
  • FIG. 3 is a timing chart showing a state of the number of revolutions of the motor 6 in the spin-drying operation performed by the dehydrator 1.
  • the horizontal axis represents the elapsed time
  • the vertical axis represents the rotational speed (unit: rpm) of the motor 6.
  • the control unit 30 measures the amount of load of the laundry Q in the dewatering tub 4 when the dewatering tub 4 starts rotating. After the load amount is measured, the control unit 30 rotates the motor 6 at a constant speed of 120 rpm after raising the rotational speed of the motor 6 to a predetermined speed of 120 rpm. Then, the control unit 30 rotates the motor 6 at a constant speed of 240 rpm after raising the motor 6 from 120 rpm to 240 rpm. Then, the control unit 30 rotates the motor 6 at a constant speed of 800 rpm after raising the motor 6 from 240 rpm to a second rotation speed of 800 rpm.
  • the laundry Q in the dewatering tank 4 is officially dehydrated.
  • the dewatering tub 4 is laterally resonated, and when the rotational speed of the motor 6 is, for example, 200 rpm to 220 rpm, the dewatering tub 4 is longitudinally resonated.
  • control unit 30 detects whether or not the laundry Q in the dewatering tank 4 is biased in the middle of the dehydration operation, and stops the motor 6 when it is detected that there is a bias. As such detection, the control unit 30 performs five kinds of electrical detections of detection 1, detection 2, detection 3, detection 4, and detection 5.
  • the detection 1 to the detection 4 are executed in the low-speed eccentricity detection section which is constituted by an acceleration period from the rotation speed of the motor 6 from 120 rpm to 240 rpm and a predetermined period after the motor 6 starts to accelerate to 240 rpm.
  • the detection 5 is performed in a high-speed eccentricity detection section during a period in which the rotational speed of the motor 6 is from 240 rpm up to 800 rpm.
  • FIG. 4 is a graph showing the relationship between the weight of the laundry Q accommodated in the dewatering tub 4 and the load amount, which is detected by the dehydrator 1 in accordance with the weight of the laundry Q.
  • the horizontal axis represents the weight (unit: kg) of the laundry Q
  • the vertical axis represents the detected value of the load amount.
  • the control unit 30 measures the amount of load of the laundry Q in the dewatering tub 4 when the dewatering tub 4 starts rotating.
  • the control unit 30 rotates the dewatering tub 4 at a predetermined number of revolutions when the dewatering tub 4 starts to rotate, and detects a value obtained by accumulating the duty ratio of the voltage applied to the motor 6 at this time as a load amount.
  • the control unit 30 electrically measures the amount of load of the laundry Q.
  • 5A and 5B are flowcharts showing an outline of the detection 1 to the detection 4.
  • step S1 when the dehydration rotation of the dewatering tank 4 is started by starting the dehydration operation (step S1), as described above, the control unit 30 measures the load amount of the laundry Q in the dewatering tank 4 (step S2), Then, the motor 6 is rotated at a constant speed of 120 rpm for a predetermined time (step S3).
  • step S4 the control unit 30 starts accelerating the motor 6 to 240 rpm (step S4), and accelerates at the motor 6.
  • step S5 the result of the detection 1 is not "OK" (step S5: NO)
  • step S5: NO the result of the detection 1 is not "OK" (step S5: NO)
  • step S6 the control unit 30 stops the motor 6 to cause the dewatering tank 4
  • step S6 the control unit 30 stops the motor 6 to cause the dewatering tank 4
  • step S7 it is judged whether or not the dehydration operation can be restarted.
  • the restart of the dehydration operation means that the control unit 30 rotates the dewatering tub 4 immediately after stopping the rotation of the dewatering tub 4 to stop the dehydration operation to restart the dehydration operation. The details will be described later, and sometimes the restart will be performed according to the degree of deviation of the laundry Q.
  • step S8 the control unit 30 performs the restart (step S8).
  • the control unit 30 shortens the length of the constant rotation of 120 rpm in the restarting dehydration operation to be shorter than the length of the constant rotation of 120 rpm in the dehydration operation that has just been stopped.
  • the time for the dehydration operation can be shortened. It should be noted that such a shortened duration can also be performed in subsequent subsequent restarts.
  • step S9 the control unit 30 performs a process of unbalance correction (step S9).
  • the control unit 30 opens the water supply valve 13 after closing the drain valve 15, and supplies water to the predetermined water level in the dewatering tank 4, so that the laundry Q in the dewatering tank 4 is immersed in water to be easily released.
  • the control unit 30 rotates the dewatering tub 4 and the rotary blade 5 to peel off the laundry Q attached to the inner circumferential surface of the dewatering tub 4, thereby agitating the laundry Q in the dewatering tub 4. Bias.
  • step S5 YES
  • the control unit 30 determines that there is no bias of the laundry Q by the detection 1
  • the control unit 30 is in the motor.
  • the above-described detection 2 is carried out (step S10).
  • step S10 NO
  • the control unit 30 stops the motor 6 and the dewatering tub 4.
  • the dehydration operation is suspended (step S11).
  • the control unit 30 confirms whether or not the dehydration condition of the dehydration operation that was suspended this time is the "wool pattern" or the "single-off operation" (step S12).
  • the wool fabric pattern refers to a dewatering condition for dehydrating the laundry Q which is easily absorbed by wool or the like.
  • the dehydration condition is the wool fabric mode (step S12: YES), and the dehydration operation of this suspension is not implemented.
  • the control unit 30 executes a restart in which the length of the 120 rpm constant rotation is shortened (step S14).
  • the single-off operation does not refer to the dehydration operation performed following the washing operation and the rinsing operation, but refers to the dehydration condition in which the laundry Q that has been rinsed is put into the dewatering tank 4 and the laundry Q is dehydrated.
  • the dehydration condition is the single-off operation (step S12: YES) and it is before the restart (step S13: YES)
  • the control unit 30 performs the restart (step S14).
  • the control unit 30 may prompt the user to reset the laundry Q in the dewatering tub 4 by the display by the operation unit 20 or an error by a buzzer or the like. On the other hand, if it is not before the restart (step S13: No), the control unit 30 performs the imbalance correction (step S15).
  • step S12 determines that the dehydration condition is neither the wool fabric mode nor the single-off operation (step S12: NO).
  • the control unit 30 determines that the dehydration operation that was suspended this time is before the restart, and determines whether or not it is possible to restart next ( Step S16).
  • step S16 determines whether or not it is possible to restart next
  • step S16 executes a restart that shortens the duration of the 120 rpm constant rotation (step S17).
  • step S16: No the control unit 30 performs imbalance correction (step S18).
  • step S10 When the result of the detection 2 is "OK" (step S10: YES), that is, when the control unit 30 determines in the detection 2 that there is no bias of the laundry Q, the control unit 30 confirms the timer. Whether the value of 35 is equal to or higher than the set value per load amount (step S19). That is, the control unit 30 confirms in step S19 whether or not the measurement time of the timer 35 has reached the negative with the laundry Q in the dewatering tub 4. The set value corresponding to the charge.
  • the setting values are described in detail below.
  • step S19: YES When the value of the timer 35 is equal to or greater than the set value of the load amount (step S19: YES), the control unit 30 performs the above-described detection 3 and detection 4 in a state where the motor 6 is rotated at a constant speed of 240 rpm (step S20). .
  • step S20: NO When the result of the detection 3 and the detection 4 is not "OK" (step S20: NO), that is, when the control unit 30 determines that there is a bias of the laundry Q, the control unit 30 causes the motor 6 and the dewatering tank 4 The stop operation is stopped (step S11), and the corresponding processing is executed in steps S12 to S18.
  • step S20 determines in the detection 3 and the detection 4 that there is no bias of the laundry Q.
  • the control unit 30 rotates the motor 6 at a constant speed of 240 rpm, and continues dehydration at 240 rpm (step S21).
  • FIGS. 6A and 6B are flowcharts showing the related control operations of the detection 1 and the detection 2. First, the detection 1 and the detection 2 will be described with reference to FIGS. 6A and 6B.
  • the detection 1 and the detection 2 are detections of whether or not the laundry Q is biased by the rotational speed of the motor 6.
  • step S4 the control unit 30 starts accelerating the motor 6 to 240 rpm, and starts the detection 1 and the detection 2.
  • the control unit 30 starts the timer 35 to start counting, and the rotation speed reading device 34 measures the rotation speed V0 of the motor 6 at the start of acceleration (step S31).
  • the rotational speed V0 is about 120 rpm.
  • the value of the timer 35 that is, regarding the timing, the detection time of the detection 1 and the detection 2, that is, the acceleration time at which the motor 6 accelerates to 240 rpm differs depending on the amount of load.
  • the reason is that the more the amount of the laundry Q, the more time the motor 6 rotates at a speed of 240 rpm. Therefore, the set value per load amount related to the acceleration time of the motor 6 is obtained in advance by experiments or the like, and is stored in the memory 32.
  • control unit 30 starts counting by the counter 36 (step S32), and initializes the counter 36 every 0.3 seconds, thereby performing counting every 0.3 seconds (step S33 and step S34).
  • the control unit 30 measures the number of revolutions Vn (n: count value) of the motor 6 at the time of counting every time (step S35). In step S35, the control unit 30 calculates a difference Sn between the measured rotational speed Vn and the rotational speed Vn-1 measured once before Vn. Further, the control unit 30 also calculates the integrated value U of the absolute value of the difference between the difference Sn and the previous difference Sn-1 in step S35.
  • Step S36 corresponds to the above-described step S19 (refer to FIG. 5A).
  • step S36 determines whether or not the difference Sn just calculated falls within the range of the detection 1 (step S38). This predetermined amount is obtained in advance by experiments or the like and stored in the memory 32.
  • FIG. 7 is a graph showing the relationship between the number of revolutions of the motor 6 and the difference Sn in association with the detection 1.
  • the horizontal axis represents the rotational speed (unit: rpm)
  • the vertical axis represents the difference Sn (unit: rpm).
  • the control unit 30 determines that the difference Sn falls within the range of the detection 1 (step S38: YES). As described above, in the detection 1, the degree of instability of the acceleration of the dewatering tub 4 indicating whether or not the laundry Q is biased is detected based on the difference Sn.
  • step S38 YES
  • the rotation of the motor 6 is stopped (the above-described step S6), and the corresponding processing in the above-described steps S7 to S9 is executed (refer to FIG. 5A).
  • the processing of steps S31 to S38 is included in the above-described step S5 (refer to FIG. 5A).
  • control unit 30 determines that it does not fall within the range of the detection 1 by the difference Sn being higher than the threshold value (step S38: No), it is judged whether or not the accumulated value U just calculated falls within the range of the detection 2 (step S39).
  • step S37: NO when the load amount of the laundry Q in the dewatering tub 4 exceeds a certain amount (step S37: NO), the control unit 30 does not perform the determination by the detection 1 in step S38, but performs the detection 2 in step S39. The judgment made. The reason is that, in the case where the amount of the laundry Q is large enough to exceed a certain amount, the amount of water oozing out from the laundry Q or the bias of the laundry Q is slidly attached to the inner circumferential surface of the dewatering tub 4 by the laundry Q. It changes abruptly, so it may not be possible to perform detection 1 steadily. Therefore, in the case where the amount of the laundry Q exceeds a certain amount, the detection 1 is omitted.
  • FIG. 8 is a graph showing the relationship between the number of revolutions of the motor 6 and the cumulative value U in association with the detection 2.
  • the horizontal axis represents time (unit: sec)
  • the vertical axis represents integrated value U (unit: rpm).
  • the threshold value is set to two threshold values, a lower threshold indicated by a square point and an upper threshold indicated by a triangular point. The upper threshold is a value higher than the lower threshold.
  • the cumulative value U is lower than the lower threshold at any timing.
  • the cumulative value U is higher than the lower threshold at any timing as indicated by a broken line.
  • the control unit 30 determines that the integrated value U falls within the range of the detection 2 (step S39: YES). In this manner, the detection 2 detects the degree of instability of the acceleration of the dewatering tub 4 indicating whether or not the laundry Q is biased based on the integrated value U.
  • step S39 YES
  • the rotation of the motor 6 is stopped (step S11 described above), and the corresponding processing in steps S12 to S18 described above is executed.
  • the processing of steps S31 to S37 and step S39 is included in the above-described step S10 (refer to FIG. 5A).
  • step S12 determines in step S16 whether the deviation of the laundry Q is so large that the cumulative value U is equal to or higher than the upper threshold or Whether the dehydration operation of the second suspension has been restarted.
  • step S16 When the integrated value U is equal to or greater than the upper threshold or has been restarted (step S16: YES), the control unit 30 performs imbalance correction (step S18). When the cumulative value U is smaller than the upper threshold and the restart is not performed (step S16: No), the control unit 30 performs the restart (step S17).
  • the determination as to whether or not the cumulative value U is equal to or greater than the upper threshold is equivalent to the determination of whether or not the restart is possible in step S16 of FIG. 5B, and whether or not the restart has been performed corresponds to whether or not the determination is made before the restart in step S16 of FIG. 5B.
  • the control unit 30 determines whether the bias in the range of the detection 2 is small enough to be restarted or is large enough to perform the imbalance correction based on whether or not the integrated value U is equal to or greater than the upper threshold. Degree, and choose to perform restart and imbalance correction based on the size of the bias.
  • step S36 when the value of the timer 35 reaches the set value per load amount (step S36: YES), the control unit 30 ends the detection. 1 and detection 2 (step S40). Further, in step S40, the control unit 30 takes the duty ratio of the voltage applied to the motor 6 at the time when the value of the timer 35 reaches the set value as the reference duty ratio d0. When the value of the timer 35 reaches the set value and the process of step S40 is executed, the motor 6 is in an acceleration state up to 240 rpm.
  • the control unit 30 determines the timing at which the reference duty ratio d0 is obtained in step S40 based on the amount of load measured during the spin-drying rotation of the dewatering tub 4. In other words, the control unit 30 changes the timings of the detection 3 and the detection 4 after the end detection 1 and the detection 2 are started, based on the amount of load. Therefore, the detection 3 and the detection 4 can be performed at an optimum timing corresponding to the amount of the laundry Q.
  • FIGS. 9A and 9B are flowcharts showing the related control operations of the detection 3 and the detection 4.
  • the detection 3 and the detection 4 will be described with reference to FIGS. 9A and 9B.
  • the detection 3 and the detection 4 are detections of whether or not the laundry Q is biased by the duty ratio of the voltage applied to the motor 6.
  • the control unit 30 acquires the reference duty ratio d0 in the above-described step S40, and starts the detection 3 and the detection 4.
  • the rotational speed of the motor 6 is in a state of having reached 240 rpm, and the motor 6 is rotated at a constant speed of 240 rpm.
  • step S41 In association with the detection 3 and the detection 4, there are a first count value E and a second count value T, which are stored in the memory 32.
  • the control unit 30 resets the first count value E and the second count value T to the initial value 0 (zero), respectively (step S41).
  • control unit 30 starts the timer 35, starts counting (step S42), and monitors whether or not the value of the timer 35 exceeds 8.1 seconds.
  • the third detection and the fourth detection are performed within a predetermined period of 8.1 seconds after the reference duty ratio d0 is obtained.
  • control unit 30 starts counting by the counter 36 in step S42, and initializes the counter 36 every 0.3 seconds, thereby performing counting every 0.3 seconds (step S43 and step S44).
  • step S44 the control unit 30 increments the second count value T by 1 (+1) at the timing of initializing the counter 36, that is, every time the count is performed.
  • the control unit 30 acquires the duty ratio dn(n: count value) of the voltage applied to the motor 6 at the time of counting every time it counts (step S45). In other words, the control unit 30 obtains the duty ratio dn once every 0.3 seconds in the predetermined period of 8.1 seconds.
  • step S45 the control unit 30 calculates the correction duty dn_diff for every 0.3 second timing based on the following equations (1) and (2).
  • the correction duty ratio dn_diff is a value obtained by correcting the duty ratio dn obtained at the same timing so that the detection in the detection 4 can be performed with high precision.
  • a and B in the formulas (1) and (2) are constants obtained by experiments or the like.
  • Dn_diff A ⁇ dn-dn_x ...(1)
  • step S46: YES when the obtained duty ratio dn is equal to or greater than the duty ratio dn-1 obtained at the previous timing (step S46: YES), the control unit 30 increments the first count value E by 1 (+1) (step S47). . Further, in the third detection, the duty ratio dn initially obtained by the control unit 30 is the above-described reference duty ratio d0. On the other hand, when the obtained duty ratio dn is lower than the duty ratio dn-1 obtained at the previous timing (step S46: NO), the control unit 30 resets the first count value E to the initial value 0 (zero). (Step S48).
  • control unit 30 confirms whether or not the value of the timer 35 is 8.1 seconds or less, that is, whether the measurement time of the timer 35 exceeds 8.1 seconds (step S49).
  • step S49: YES when the value of the timer 35 is 8.1 seconds or less (step S49: YES), when the load amount of the laundry Q in the dewatering tub 4 is equal to or greater than a predetermined amount (step S50: YES), the control unit 30 determines the latest one. Whether the first count value E falls within the range of the detection 3 (step S51). This predetermined amount is obtained in advance by an experiment or the like and stored in the memory 32.
  • the first count value E is set in advance by a threshold value and stored in the memory 32.
  • FIG. 10 is a graph showing the relationship between time and the first count value E in association with the detection 3.
  • the horizontal axis represents time (unit: sec)
  • the vertical axis represents the first count value E.
  • the threshold value is set to a threshold value of a lower threshold value indicated by a one-dot chain line and an upper threshold value indicated by a two-dot chain line. Both the upper threshold and the lower threshold are independent of elapsed time and are fixed values.
  • the upper threshold is a value higher than the lower threshold.
  • the motor 6 can be rotated at a constant speed of 240 rpm even if the voltage is small, the duty ratio dn is gradually decreased. Thereby, the first count value E is stabilized at the initial value of 0 (zero) as indicated by the solid line.
  • the duty ratio dn does not decrease.
  • the first count value E does not return to the initial value but increases, as indicated by the broken line, above the lower threshold at any timing.
  • the bias of the object Q is large, the first count value E is also higher than the upper threshold.
  • step S51 YES
  • the control unit 30 determines that there is a bias of the laundry Q in the dewatering tub 4.
  • step S51: NO it is determined whether the corrected duty ratio dn_diff just calculated falls within the detection 4 Within the range.
  • step S50 when the load amount of the laundry Q in the dewatering tub 4 is less than a certain amount (step S50: NO), the control unit 30 does not perform the determination by the detection 3 in step S51, but performs the detection in step S52. 4 judgments made.
  • the reason for this is that when the detection 3 is performed with the amount of the laundry Q being less than a certain amount, the first count value E is unstable due to the convergence of the duty ratio dn at an earlier stage, and may be unstable. Perform test 3. Therefore, in the case where the amount of the laundry Q is less than a certain amount, the detection 3 is omitted.
  • FIG. 11 is a graph showing the relationship between the time and the corrected duty ratio dn_diff in association with the detection 4.
  • the horizontal axis represents time (unit: sec)
  • the vertical axis represents corrected duty ratio dn_diff.
  • the threshold value is set to a threshold value of a lower threshold value indicated by a one-dot chain line and an upper threshold value indicated by a two-dot chain line.
  • the upper threshold and the lower threshold are gradually increased with elapsed time, respectively.
  • the upper threshold is a value higher than the lower threshold.
  • the correction duty ratio dn_diff is lower than the lower threshold and gradually decreases as indicated by the solid line.
  • the correction duty ratio dn_diff does not decrease as indicated by a broken line. It will exceed the lower threshold.
  • the correction duty ratio dn_diff also exceeds the upper threshold. Therefore, returning to FIG. 9A, when the correction duty ratio dn_diff is equal to or higher than the lower threshold value, the control unit 30 determines that the correction duty ratio dn_diff falls within the range of the detection 4 (step S52: YES).
  • the correction duty ratio dn_diff obtained by the above equations (1) and (2) is set to be equal to or greater than the reference duty ratio d0 when the duty ratio dn is equal to or greater than the reference duty ratio d0.
  • the first count value E for detecting 3 and the correction duty ratio dn_diff for detecting 4 are the duty ratios of the voltages applied to the motor 6 in order to maintain 240 rpm for the predetermined period of 8.1 seconds described above.
  • the control unit 30 determines whether or not the laundry Q in the dewatering tub 4 is biased based on such an index.
  • the reference duty ratio d0 is a detection of whether or not the left and right laundry Q is biased. An important factor in accuracy.
  • the control unit 30 measures the load amount of the laundry Q in the dewatering tub 4 when the dewatering tub 4 starts to rotate (step S2 in FIG. 5A), and determines the acquisition based on the measured load amount. The timing of the reference duty ratio d0 (step S36 of Fig. 6A).
  • the reference duty ratio d0 is obtained at an appropriate timing in consideration of the influence of the load amount, it is possible to accurately perform the discrimination of the laundry Q in the detection 3 and the detection 4 based on the reference duty ratio d0. Detection. As a result, it is possible to improve the detection accuracy of whether or not the laundry Q is biased.
  • step S51: YES determines that the first count value E falls within the range of the detection 3
  • step S52: Yes determines that the correction duty ratio dn_diff falls within the range of the detection 4
  • step S52: Yes the control unit 30 stops.
  • the rotation of the motor 6 performs the corresponding processing in the above-described steps S12 to S18.
  • the processing of steps S40 to S52 is included in the above-described step S20 (refer to FIG. 5A).
  • Step S16A and step S16B in Fig. 9B are included in the above-described step S16 (refer to Fig. 5B). Specifically, the determination in step S16A corresponds to whether or not the determination is made before the restart in step S16 of FIG. 5B, and the determination in step S16B corresponds to the determination as to whether or not the restart can be performed in step S16 of FIG. 5B.
  • step S12 determines in step S16A whether or not the dehydration operation that was suspended this time is before the restart.
  • the control unit 30 determines whether the deviation of the laundry Q is as small as the first count value E and the correction duty ratio dn_diff are smaller than the respective upper thresholds.
  • step S16A YES
  • step S16B YES
  • step S18 the control unit 30 performs the imbalance correction (step S18). Further, even before the restart (step S16A: YES), when at least one of the first count value E and the correction duty ratio dn_diff is equal to or greater than the respective upper thresholds (step S16B: No), the control unit 30 executes Unbalance correction (step S18).
  • control unit 30 determines the fall detection 3 and the detection 4 based on the first count value E and the correction duty dn_diff in steps S16B to S18.
  • the bias is small enough to be restarted or large enough to require an imbalance correction.
  • control unit 30 selectively performs the restart and the imbalance correction based on the first count value E and the degree of the correction duty ratio dn_diff, in other words, based on whether or not the values are equal to or greater than the respective upper thresholds. Therefore, when it is judged that there is a bias of the laundry Q, it is not necessary to uniformly perform the imbalance correction. Therefore, when the first count value E and the correction duty ratio dn_diff are values indicating that the deviation of the laundry Q is small, the time for the dehydration operation can be shortened by immediately performing the restart.
  • step S49: NO when the value of the timer 35 has passed 8.1 seconds (step S49: NO), the control unit 30 ends the detection 3 and the detection 4 (step S53).
  • FIG. 12 is a flowchart showing an outline of the detection 5-1 and the detection 5-2.
  • the detection 5-1 and detecting 5-2 the laundry Q using the duty ratio is detected without bias.
  • the motor 6 is further rotated at a constant speed of 240 rpm for a predetermined time.
  • the control unit 30 accelerates the motor 6 from 240 rpm to the above-described target number of 800 rpm (step S60).
  • the control unit 30 takes the duty ratio of the voltage applied to the motor 6 at that time point as the ⁇ value (step S61).
  • 300rpm is off The state in which the water tub 4 is not stored in water and is most unaffected by the eccentricity of the dewatering tub 4. Therefore, the ⁇ value of 300 rpm is the duty ratio in the state which is most affected by the eccentricity of the dewatering tank 4 and is only affected by the load amount of the laundry Q.
  • step S62 the control unit 30 performs the above-described detection 5-1 while the number of rotations is from 600 pm to 729 rpm in a state where the motor 6 continues to accelerate (step S62).
  • step S62: NO the result of the detection 6-1 is not "OK"
  • step S62: NO the control unit 30 stops the motor 6, and stops the dehydration tank 4. Rotation (step S63). In this way, after the dehydration operation is suspended, the control unit 30 determines whether or not it is before the restart, that is, whether or not the dehydration operation that has been suspended this time has been restarted (step S64).
  • step S64 When it is before the restart (step S64: YES), the control section 30 performs a restart (step S65). When it is not before the restart (step S64: No), the control unit 30 performs the imbalance correction (step S66).
  • step S62 determines in the case of the detection 5-1 that there is no bias of the laundry Q.
  • the control unit 30 then performs the above-described detection 5-2 in a state where the motor 6 continues to accelerate from 730 rpm (step S67).
  • step S67 YES
  • the control unit 30 passes. After the motor 6 is accelerated to the target rotational speed (800 rpm), the motor 6 is rotated at a constant speed at the target rotational speed, thereby continuing the dehydration of the laundry Q (step S68).
  • step S67: NO when the result of the detection 5-2 is not "QK" (step S67: NO), that is, when the control unit 30 determines that there is a bias of the laundry Q, the control unit 30 The motor 6 is rotated at a constant speed equal to or lower than the above-described target rotation speed, and the dehydration of the laundry Q is continued (step S69).
  • Fig. 13 is a flowchart showing the related control operation of the detection 5-1.
  • control unit 30 starts the detection 5-1 as the number of revolutions of the motor 6 reaches 600 rpm in a state where the motor 6 is accelerated in the above-described step S61 (see Fig. 12) (step S70).
  • control unit 30 starts counting by the counter 36 (step S71), and initializes the counter 36 every 0.3 seconds, thereby performing counting every 0.3 seconds (step S72 and step S73).
  • the control unit 30 acquires the rotational speed of the motor 6 at the time of counting once and the duty ratio dn(n: count value) of the voltage applied to the motor 6 at the time of counting (step S74). In other words, the control unit 30 acquires the number of revolutions of the motor 6 and the duty ratio dn every predetermined timing while the rotational speed of the motor 6 is from 240 rpm to 800 rpm.
  • step S74 the control unit 30 calculates a correction value Bn obtained by correcting the duty ratio dn by the above-described ⁇ value based on the following equation (3).
  • X and Y in Formula (3) are the constants computed by experiment etc..
  • the correction value Bn obtained by correcting the duty ratio dn by changing the weight by the equation (3) can perform the detection 5-1 with high precision.
  • step S74 the control unit 30 calculates the movement integrated value Cn (n: count value) of the correction value Bn.
  • the movement cumulative value Cn (n: count value) is a value obtained by totaling five correction values Bn that are consecutive in the counting order. Further, for a certain movement integrated value Cn and the previous movement integrated value Cn-1, the rear four correction values Bn and the movement cumulative value Cn among the five correction values Bn constituting the movement integrated value Cn-1 The four correction values Bn on the front side of the five correction values Bn are the same value, respectively. It should be noted that the number of correction values Bn totaled to constitute the movement integrated value Cn is not limited to the above five.
  • control unit 30 calculates a threshold value of the movement integrated value Cn based on the following formula (4) (step S75).
  • Threshold (speed) ⁇ a + b... equation (4)
  • a and b in the formula (4) are constants obtained by experiments or the like, and are stored in the memory 32. Further, these constants a and b differ depending on the current number of revolutions of the motor 6 and the selected dewatering conditions. Therefore, the threshold here has multiple values at the same rotational speed. It should be noted that it is apparent from the formula (4) that the threshold value is a value that is not affected by the above-described ⁇ value.
  • control unit 30 confirms whether or not the current number of revolutions of the motor 6 is less than 730 rpm (step S76).
  • step S76 determines whether or not the latest moving integrated value Cn falls within the range of the detection 5-1 (step S77).
  • FIG. 14 is a graph showing the relationship between the rotational speed and the movement cumulative value Cn in association with the detection 5-1 and the detection 5-2.
  • the horizontal axis represents the number of revolutions (unit: rpm), and the vertical axis represents the movement cumulative value Cn.
  • two threshold values of a first threshold value indicated by a one-dot chain line and a second threshold value indicated by a two-dot chain line are set depending on, for example, a dehydration condition. First A threshold is higher than the second threshold.
  • the dehydration condition there is a dehydration condition in which the dewatering tank 4 is stored in water, and the dehydration operation is performed after the "normal rinsing" of the rinsing laundry Q, and the “water spray dehydration” is performed by spraying water to the laundry Q while performing the dehydration operation. And the above-mentioned “restart” and other dehydration conditions. These dehydration conditions are selected by the user by operating the operation unit 20, and the selection is received by the control unit 30.
  • the control unit 30 After the washing operation and the dehydration operation after the normal rinsing, since the detection is difficult to perform by using the second threshold value, the control unit 30 uses the first threshold value higher than the second threshold value. On the other hand, in the dehydration operation of the water spray dehydration and restart, since the detection is too loose using the first threshold value, the control unit 30 uses the second threshold value lower than the first threshold value. Therefore, in the case where the laundry Q contains a large amount of water, or in the case where the laundry Q is partially removed, the detection 5-1 is performed using a threshold suitable for each case.
  • the detection 5-1 since the second threshold is used, the detection is difficult, and thus the control is performed.
  • the portion 30 uses a first threshold that is higher than the second threshold. Further, in the case where the load amount of the laundry Q in the dewatering tub 4 is small, in the detection 5-1, since the detection is too loose using the first threshold value, the control section 30 uses the second threshold value lower than the first threshold value. . Therefore, the detection 5-1 is performed using threshold values appropriate for the case where the load amount of the laundry Q is different, respectively.
  • the threshold values of the first threshold and the second threshold are exemplified in FIG. 14
  • the threshold may be set to three or more types according to various dehydration conditions and load amounts.
  • the movement is accumulated at each rotation speed as compared with the case where the eccentricity is small and there is no bias of the laundry Q (refer to the solid line).
  • the value Cn is larger.
  • the movement cumulative value Cn exceeds the set threshold value, that is, the corresponding one of the first threshold and the second threshold.
  • control unit 30 determines that the moving integrated value Cn falls within the range of the detection 5-1 (step S77: YES).
  • step S77 YES
  • step S63 described above
  • steps S64 to S66 described above is executed.
  • steps S71 to S77 is included in the above-described step S62 (refer to FIG. 12).
  • step S76 NO
  • the control section 30 ends the detection 5-1, and then starts the detection 5-2 (step S78).
  • Fig. 15 is a flowchart showing the related control operation of the detection 5-2.
  • the control unit 30 starts the detection 5-2 as the number of revolutions of the motor 6 reaches 730 rpm (step S78 described above).
  • control unit 30 starts counting by the counter 36 (step S79), and initializes the counter 36 every 0.3 seconds, thereby performing counting every 0.3 seconds (step S80 and step S81).
  • control unit 30 acquires the rotation speed of the motor 6 at the time of counting and the duty ratio dn of the voltage applied to the motor 6 at the time of counting, and calculates the correction value Bn and The cumulative value Cn is moved (step S82).
  • the control unit 30 calculates a threshold value of the movement integrated value Cn based on the above formula (4) (step S83).
  • the constants a and b constituting the equation (4) are the same as the detection 5-1, and vary depending on the current number of revolutions of the motor 6 and the selected dehydration conditions. Therefore, the threshold here has a plurality of values at the same rotational speed like the first threshold and the second threshold described above.
  • control unit 30 confirms whether or not the current number of revolutions of the motor 6 has reached the target number of revolutions (800 rpm) (step S84).
  • step S84 determines whether or not the latest moving integrated value Cn falls within the detection 5-2, similarly to the case of the detection 5-1 (step S77). Within the range (step S85).
  • control unit 30 determines that the moving integrated value Cn falls within the range of the detection 5-2 (step S85: YES).
  • step S85 YES
  • step S86 the control unit 30 acquires the rotation speed L of the motor 6 at the time of detection 5-2 when the determination is made.
  • control unit 30 continues the spin-drying of the laundry Q by rotating the motor 6 at a constant speed at a rotational speed obtained by strictly setting the bit value of the rotational speed L to 0 (zero) at the obtained rotational speed L (Ste S69) above.
  • control unit 30 extends the dehydration time at the rotation speed L so as to obtain the same dehydration effect as when the dehydration is performed at the original target rotation speed.
  • step S84 the control unit 30 ends the detection 5-2 by making the motor at the target rotation speed. 6 Spinning at a constant speed, the dehydration of the laundry Q is continued (step S68 described above).
  • the control unit 30 changes the threshold value in accordance with the dehydration condition received by the operation unit 20 (steps S75 and S83).
  • the control unit 30 determines that the laundry Q is biased in the dewatering tank 4. .
  • it is possible to detect whether or not the laundry Q is biased by the threshold value appropriate for each dehydration condition during the dehydration operation of each dehydration condition it is possible to improve the detection accuracy of the presence or absence of the laundry Q.
  • control unit 30 can also perform control for detecting the bubble in the drain passage 14 in parallel with the above-described correlation control of the detections 1 to 5.
  • Fig. 16 is a flow chart showing a control operation for detecting a bubble during a dehydrating operation.
  • control unit 30 starts dehydration rotation of dewatering tank 4 by starting dehydration operation (step S1 described above). Thereby, the number of revolutions of the motor 6 rises as described above (see FIG. 3).
  • the control unit 30 acquires the duty ratio of the rotational speed of the motor 6 and the duty ratio of the voltage applied to the motor 6 at a predetermined timing in the dehydration operation (step S91).
  • the control unit 30 calculates the voltage limit value V_limit (step S93).
  • the voltage limit value V_limit is a duty ratio of the maximum voltage applied to the motor 6 at each rotation speed, and is calculated by substituting the rotation speed into a predetermined equation.
  • control unit 30 detects whether or not the applied voltage duty obtained in step S91 is equal to or greater than the voltage limit value V_limit at each timing (step S94).
  • step S94 determines that the foam is blocked by the drain passage 14 (step S94: YES).
  • step S94: NO the control unit 30 determines that the bubble is not in the state of the drain passage 14 (step S94: NO).
  • step S94 determines that the foam is clogged with the drain passage 14 (step S94: YES)
  • step S95 it is determined whether or not it is before the restart, that is, whether or not the restart is performed for the dehydration operation that has been suspended this time (step S95).
  • step S95 When it is before the restart (step S95: YES), the control section 30 performs a restart (step S96). When it is not before the restart (step S95: NO), the control section 30 performs the imbalance correction (step S97). Whether it is a restart or an imbalance correction, the dehydration operation will restart after a temporary suspension. Therefore, during the restart of the dehydration operation, the foam of the drainage path 14 naturally disappears.
  • step S92 when the number of rotations of the motor 6 is 600 rpm or more (step S92: No), the control unit 30 ends the process of detecting the bubble (step S98).
  • control of Fig. 16 can be used not only for the detection of the foam but also for detecting the phenomenon of "water retention” in which the water in the outer tub 3 cannot reach the drainage path 14 due to vibration or the like.
  • the detection 1 to the detection 4 are performed to electrically detect whether or not the laundry Q in the dewatering tank 4 is biased, but the detection 1 may be replaced by the detection 1
  • the detection 4 performs the detection 6 described below, and the detection 6 can be performed in parallel with the detection 1 to the detection 4.
  • FIG. 17 is a time chart showing a state in which the number of rotations of the motor 6 in the middle of the dehydration operation is detected in association with the detection 6, and in detail, a portion corresponding to the low-speed eccentricity detection section in FIG. 3 is extracted. Therefore, In the timing chart of Fig. 17, the same as Fig. 3, the horizontal axis represents the elapsed time, and the vertical axis represents the rotational speed (unit: rpm) of the motor 6. In addition, in FIG. 17, the state of the duty of the voltage applied to the motor 6 by the control part 30 is shown with the d
  • control unit 30 controls the duty ratio such that the maximum value of the duty ratio is generated in the middle of the acceleration state in which the motor 6 is accelerated from 120 rpm to 240 rpm in the low speed eccentricity detecting section. At this time, the acceleration of the motor 6 is controlled to be always fixed.
  • the maximum value of the duty ratio generated in the middle of the acceleration state of the motor 6 is referred to as the maximum duty ratio dmax.
  • the control unit 30 controls the generation of the maximum duty ratio dmax when the reciprocating barrel 4 resonates, and the rotational speed (for example, 180 rpm) which is slightly lower than the rotational speed (the above-described 200 rpm to 220 rpm) in which the longitudinal resonance occurs in detail is generated. Empty ratio.
  • control of the duty ratio is performed in common regardless of the magnitude of the load amount of the laundry Q in the dewatering tub 4. Further, in order to realize this control, the control unit 30 sets in advance a gain indicating the difference between the target number of revolutions of the motor 6 and the current actual number of revolutions, and the responsiveness indicating the change in the number of revolutions with respect to the duty ratio. It should be noted that, hereinafter, the rotational speed at which longitudinal resonance occurs is referred to as longitudinal resonance rotational speed.
  • the control unit 30 accelerates the motor 6 from 120 rpm, the duty ratio gradually increases as indicated by a broken line in FIG. Then, the maximum duty ratio dmax is generated when the rotational speed of the motor 6 reaches 180 rpm.
  • the duty ratio is gradually decreased as indicated by a broken line.
  • the vibration increases as the rotational speed of the motor 6 approaches the longitudinal resonance rotational speed. Therefore, since the duty ratio must be increased after the maximum duty ratio dmax is generated in order to accelerate the motor 6 to 240 rpm, the duty ratio after the maximum duty ratio dmax is generated is not easily reduced. Therefore, after the maximum duty ratio dmax is generated, the duty ratio is sometimes also shown as a 1-point lock line as shown in FIG. 17, and is maintained at a value slightly lower than the maximum duty ratio dmax without being reduced, or as shown in FIG. As indicated by the alternate long and short dash line, it increases after temporarily falling below the maximum duty ratio dmax. In the detection 6, by monitoring the relative change of the duty ratio with respect to the maximum duty ratio dmax after the maximum duty ratio dmax is generated, the laundry Q in the dewatering tank 4 is biased and electrically detected.
  • FIG. 18 is a flowchart showing the related control operation of the detection 6. The detection 6 will be described with reference to Fig. 18 .
  • step S4 the control unit 30 starts accelerating the motor 6 from 120 rpm to 240 rpm. Then, in the acceleration state when the motor 6 is accelerated to 240 rpm, when the rotation speed of the motor 6 reaches, for example, 180 rpm, the duty ratio is the maximum value, the control unit 30 takes the maximum value as the maximum duty ratio dmax (step S101). ).
  • step S101 In association with the detection 6, there is a count value G and an accumulated value H, which are stored in the memory 32.
  • the control unit 30 resets the count value G and the integrated value H to the initial value 0 (zero), respectively (step S101).
  • step S102 when the rotation speed of the motor 6 reaches the rotation speed (for example, 200 rpm) immediately before the longitudinal resonance occurs (step S102: YES), the control section 30 starts the timer 35 to start counting, and starts to pass.
  • the counter 36 counts (step S103). Thereby, the detection 6 is started.
  • the control unit 30 refers to the value of the timer 35 and initializes the counter 36 once every predetermined time (for example, 0.1 second), and counts it every 0.1 seconds (steps S104 and S105).
  • the control unit 30 increments the count value G by one (+1) once every time the timer 36 is initialized in step S105, that is, the timing of each count.
  • the control unit 30 acquires the duty ratio dg (g: count value G) of the voltage applied to the motor 6 at the time of counting every time (step S106). In other words, the control unit 30 obtains the duty ratio dg once every 0.1 second.
  • step S106 the control unit 30 acquires the duty ratio dg once every predetermined time, and calculates the integrated value H of the difference between the duty ratio dg and the previous maximum duty ratio dmax.
  • the difference is a value obtained by subtracting the duty ratio dg from the maximum duty ratio dmax
  • the cumulative value H is a value obtained by adding the latest difference value H to the latest difference value, and is updated every time the count value G is incremented by one.
  • FIG. 19 is a diagram showing the relationship between the count value G and the integrated value H in association with the detection 6.
  • the horizontal axis represents the count value G
  • the vertical axis represents the integrated value H.
  • the cumulative value H is set to a predetermined threshold.
  • This threshold value is obtained by the following equation (5) in which the count value G and the maximum duty ratio dmax which are added once every predetermined time are used as variables.
  • Threshold (K ⁇ G - L) - M ⁇ (N - dmax) ... (5)
  • K, L, M, and N in the formula (5) are constants obtained in advance by experiments or the like, and are stored in the memory 32. As indicated by a chain line in FIG. 19, the threshold value fluctuates in such a manner as to increase as the count value G increases.
  • the threshold value may be stored in the memory 32 in advance, or may be calculated by the control unit 30 based on the equation (5) every time the count value G fluctuates.
  • step S107 when the timing when the count value G reaches 20, specifically, the timing at which the longitudinal resonance starts is reached (step S107: YES), the control unit 30 confirms whether or not the latest integrated value H is smaller than that obtained by the equation (5).
  • the prescribed threshold step S108.
  • step S109 the control unit 30 determines that the laundry Q is biased in the dewatering tub 4, and stops the motor 6 (step S109). Thereby, the rotation of the dewatering tub 4 is stopped. After the motor 6 is stopped, the processes of steps S11 to S18 may be performed in the same manner as the detections 1 to 4 (see FIG. 5B).
  • step S108 When the cumulative value H is not lower than the predetermined threshold (step S108: NO), and the count value G reaches a prescribed value (for example, 81) (step S110: YES), the rotational speed of the motor 6 reaches 240 rpm, and the motor 6 is at a constant speed of 240 rpm. The state of rotation. In this case, the control unit 30 ends the detection 6 (step S111).
  • a prescribed value for example, 81
  • the duty ratio is set such that the maximum duty ratio dmax is generated at a rotational speed slightly lower than the longitudinal resonance rotational speed.
  • longitudinal resonance occurs at an earlier timing after the maximum duty ratio dmax is generated.
  • H cumulative value
  • the bias of the laundry Q in the dewatering tub 4 can be detected early and correctly.
  • the maximum duty ratio dmax is generated at the longitudinal resonance rotational speed, there is a possibility that the fluctuation of the subsequent rotational speed becomes unstable.
  • such a problem can be suppressed by generating the maximum duty ratio dmax at a rotational speed slightly lower than the longitudinal resonance rotational speed.
  • FIG. 20 is a diagram showing the relationship between the count value G and the duty ratio in association with the detection 6.
  • the horizontal axis represents the count value G
  • the vertical axis represents the duty ratio.
  • the difference R between the duty ratio dg and the maximum duty ratio dmax after a predetermined time elapses from the generation of the maximum duty ratio dmax is significantly smaller than the difference S when the load amount is large. Therefore, it is conceivable that the integrated value H when the load amount is small becomes difficult to increase as compared with the case where the load amount is large, and the integrated value H is lower than the threshold value even if there is no bias of the laundry Q. Thus, when the amount of load is small, the presence of the deviation of the laundry Q may be erroneously detected to stop the dehydration operation.
  • the threshold value is obtained by the equation (5) having the count value G and the maximum duty ratio dmax as variables as described above. Therefore, since the maximum duty ratio dmax varies depending on the amount of load of the laundry Q in the dewatering tub 4, the threshold value is determined depending on the amount of load. Thereby, the detection 6 detects whether or not the laundry Q is biased based on the optimum threshold value corresponding to the magnitude of the load amount of the laundry Q in the dewatering tub 4, so that it can be prevented even when the load amount is small. False detection. Therefore, it is possible to further improve the detection accuracy of the presence or absence of the laundry Q.
  • the motor 6 is controlled by the duty ratio on the premise that the motor 6 is a variable frequency motor.
  • the value applied to the motor 6 instead of the duty ratio is used. To control the motor 6.
  • the duty ratio may be obtained for various determinations, but the duty ratio may be original data of the obtained duty ratio, or may be a correction value corrected as necessary. It may be a value calculated from the duty ratio like the above-described movement integrated value Cn.
  • the dewatering tub 4 of the above-described embodiment is vertically disposed so as to be rotatable about the axis 16 extending in the vertical direction X.
  • the detent can be inclined by extending the axis 16 obliquely with respect to the vertical direction X. Bucket 4.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
PCT/CN2016/083395 2014-06-30 2016-05-26 脱水机 WO2016188437A1 (zh)

Priority Applications (4)

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US15/576,592 US20180155862A1 (en) 2014-06-30 2016-05-26 Dewatering Machine
KR1020177037320A KR102005360B1 (ko) 2014-06-30 2016-05-26 탈수기
EP16799324.5A EP3305959A4 (de) 2015-05-26 2016-05-26 Entfeuchter
CN201680028339.XA CN107709650B (zh) 2014-06-30 2016-05-26 脱水机

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JP2015106538A JP6350874B2 (ja) 2014-06-30 2015-05-26 脱水機
JP2015-106538 2015-05-26

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JP6594673B2 (ja) * 2015-06-18 2019-10-23 アクア株式会社 洗濯機

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JP2008035925A (ja) * 2006-08-02 2008-02-21 Sanyo Electric Co Ltd 洗濯機
JP2008307414A (ja) * 2008-09-26 2008-12-25 Sanyo Electric Co Ltd 洗濯機
CN102251369A (zh) * 2010-05-20 2011-11-23 三洋电机株式会社 洗衣机
CN102251367A (zh) * 2010-05-20 2011-11-23 三洋电机株式会社 洗衣机
JP2016026536A (ja) * 2014-06-30 2016-02-18 ハイアールアジア株式会社 脱水機

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JP2000140481A (ja) * 1998-11-11 2000-05-23 Sanyo Electric Co Ltd ドラム式洗濯機
JP3641581B2 (ja) * 2000-10-24 2005-04-20 株式会社東芝 ドラム式洗濯機
KR100671193B1 (ko) * 2003-06-06 2007-01-18 산요덴키가부시키가이샤 드럼식 세탁기
JP2005046170A (ja) * 2003-06-06 2005-02-24 Sanyo Electric Co Ltd ドラム式洗濯機

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JP2008035925A (ja) * 2006-08-02 2008-02-21 Sanyo Electric Co Ltd 洗濯機
JP2008307414A (ja) * 2008-09-26 2008-12-25 Sanyo Electric Co Ltd 洗濯機
CN102251369A (zh) * 2010-05-20 2011-11-23 三洋电机株式会社 洗衣机
CN102251367A (zh) * 2010-05-20 2011-11-23 三洋电机株式会社 洗衣机
JP2016026536A (ja) * 2014-06-30 2016-02-18 ハイアールアジア株式会社 脱水機

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