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WO2017101857A1 - 滚筒式洗衣机 - Google Patents

滚筒式洗衣机 Download PDF

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Publication number
WO2017101857A1
WO2017101857A1 PCT/CN2016/110377 CN2016110377W WO2017101857A1 WO 2017101857 A1 WO2017101857 A1 WO 2017101857A1 CN 2016110377 W CN2016110377 W CN 2016110377W WO 2017101857 A1 WO2017101857 A1 WO 2017101857A1
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WO
WIPO (PCT)
Prior art keywords
drum
driving
drive motor
rotating body
clutch
Prior art date
Application number
PCT/CN2016/110377
Other languages
English (en)
French (fr)
Inventor
谷越修
中本重阳
山内智博
永井孝之
松下丈也
北川宏之
Original Assignee
青岛海尔洗衣机有限公司
海尔亚洲株式会社
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 青岛海尔洗衣机有限公司, 海尔亚洲株式会社 filed Critical 青岛海尔洗衣机有限公司
Priority to EP16874914.1A priority Critical patent/EP3392391B1/en
Priority to CN201680073229.5A priority patent/CN108474166B/zh
Priority to US16/063,223 priority patent/US10876243B2/en
Publication of WO2017101857A1 publication Critical patent/WO2017101857A1/zh

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Classifications

    • 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 
    • D06F33/32—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry
    • D06F33/40—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry of centrifugal separation of water from the laundry
    • 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
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/02—Rotary receptacles, e.g. drums
    • D06F37/04—Rotary receptacles, e.g. drums adapted for rotation or oscillation about a horizontal or inclined axis
    • D06F37/06—Ribs, lifters, or rubbing means forming part of the receptacle
    • 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
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/30—Driving arrangements 
    • D06F37/304—Arrangements or adaptations of electric motors
    • 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
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/30—Driving arrangements 
    • D06F37/40—Driving arrangements  for driving the receptacle and an agitator or impeller, e.g. alternatively
    • 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
    • D06F2103/44—Current or voltage
    • D06F2103/46—Current or voltage of the motor driving the drum
    • 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
    • D06F2105/48—Drum speed
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers

Definitions

  • the present invention relates to a drum type washing machine.
  • the drum type washing machine can continuously perform the operation from laundry to drying, or can only perform laundry without drying.
  • a drum type washing machine rotates a horizontal axis type drum in an outer cylinder in which water is stored at the bottom, and lifts the laundry by a baffle provided in the drum, and drops the laundry to the inner circumference of the drum. The surface is thus washed.
  • the laundry is stirred by the lifting ribs like this, the laundry is hardly entangled with each other or rubbed against each other. Therefore, in the drum type washing machine, in order to improve the washing performance, it is possible to adopt a structure in which a stirring body is provided on the rear surface of the drum, and the drum and the stirring body are independently rotated at different rotation speeds during washing and rinsing (refer to the patent literature). 1).
  • Patent Document 1 Japanese Laid-Open Patent Publication No. 2015-167663
  • drum type washing machine rotates at a rotation speed different from the rotation speed of the drum during washing and rinsing, the laundry is easily knotted in the drum, and the laundry is likely to be knotted.
  • the inventors observed the activity of the laundry in the drum, and found that when such knotting occurred, the activity of the laundry was generated in which the entangled laundry was entangled in the drum due to the rotation of the agitating body. The central part is pushed onto the axis of the agitator.
  • the entangled laundry may collect to the central portion of the drum, and a large amount of laundry is accumulated and compressed on the front surface of the covering drum.
  • the state between the body and the agitator As a result, there is a hidden danger that it is easy to apply a large load generated by the laundry to the stirring body, resulting in The drive motor that drives the agitator is locked.
  • the present invention has been made in view of the above problems, and an object thereof is to provide a drum type washing machine which is capable of preventing a lock of a drive motor due to knotting or the like.
  • a drum type washing machine includes: an outer cylinder disposed in the casing; and a drum disposed in the outer cylinder and rotatable about a horizontal axis or an inclined axis inclined with respect to a horizontal direction; a body disposed in the drum, the surface having a protrusion contacting the laundry; a driving portion including a driving motor, and transmitting torque of the driving motor to the drum and the rotating body, the drum And the rotating body rotate at different rotational speeds; and the control unit controls the operation of the driving unit.
  • the control unit performs the mitigation control for mitigating the load when the magnitude of the load applied to the rotating body exceeds a predetermined size.
  • the drum type washing machine of this aspect may further include a detecting unit that detects the number of revolutions of the drive motor.
  • the control unit adjusts power supply to the drive motor when the rotary body is rotated to rotate the drive motor at a target rotational speed, and at this time, the drive motor The mitigation control is performed when the number of revolutions is lower than a threshold value of the target number of revolutions.
  • control unit may be configured to rotate the drive motor to the right and left, and to rotate the drive motor to be less than the threshold value during the rotation of both of them. , performing the mitigation control.
  • control unit may be configured to rotate the drum so that the centrifugal force acting on the laundry in the drum rotates at a higher rotational speed than gravity.
  • the drive motor rotates.
  • the drum can be rotated by the centrifugal force that acts on the laundry in the drum to be greater than the speed of gravity, and the laundry collected in the center portion is dispersed to the inner peripheral surface side of the drum. Thereby, the load applied to the rotating body can be effectively reduced.
  • the driving unit can be switched to the first driving form and the second driving form, wherein the first driving form is such that the drum and the rotating body are mutually In the drive mode in which the rotation speed is different, the second drive mode is a drive mode in which the drum and the rotary body are integrally rotated at equal rotational speeds.
  • the control unit rotates the drum so that the centrifugal force acting on the laundry in the drum is greater than the speed of gravity. Rotate.
  • the drive mode of the drive unit is switched to the second drive mode when the drum is rotated during the mitigation control, the torque of the drive motor required is smaller than that of the first drive mode. Thereby, the rotation of the drum is easily raised to a speed higher than that during the washing and rinsing to reduce the control.
  • FIG. 1 is a side cross-sectional view showing a configuration of a drum type washing machine according to an embodiment.
  • FIG. 2 is a cross-sectional view showing a configuration of a drive unit according to the embodiment.
  • FIG 3 is a cross-sectional view showing a configuration of a drive unit according to the embodiment.
  • FIG. 4 is a front view showing a rotor of a configuration of a rotor of a drive motor according to an embodiment.
  • Fig. 5 is an enlarged perspective view of a rear portion of a bearing unit in which a spline is formed according to an embodiment.
  • FIG. 6 are views showing a configuration of a clutch body of a clutch mechanism portion according to the embodiment.
  • FIG. 7 is a block diagram showing a configuration of a drum type washing machine according to an embodiment.
  • FIG. 8 is a view showing a process performed by a control unit in a washing process and a rinsing process according to an embodiment
  • FIG. 9 is a flowchart showing a control operation of the distributed control by the control unit according to the embodiment.
  • FIG. 10 is a view schematically showing a state in which the entangled laundry according to the embodiment is collected in a central portion of the drum, and the rotator is pressed between the door and the rotator;
  • (b) of FIG. 10 is a view schematically showing a state in which the laundry collected in the center portion of the drum is dispersed on the inner peripheral surface side of the drum by performing the dispersion control according to the embodiment.
  • FIG. 11 is a cross-sectional view showing a configuration of a drive unit according to Modification 1.
  • FIG. 1 is a side cross-sectional view showing the structure of a drum type washing machine 1.
  • the drum type washing machine 1 is provided with a casing 10 that constitutes an appearance.
  • the front surface 10a of the casing 10 is inclined from the center portion to the upper portion, and the laundry inlet 11 is formed on the inclined surface.
  • the inlet 11 is covered by a door 12 that is freely opened and closed.
  • the outer cylinder 20 is elastically supported by a plurality of dampers 21.
  • a drum 22 is rotatably disposed in the outer cylinder 20.
  • the outer cylinder 20 and the rear surface side of the drum 22 are inclined so as to be lower than the horizontal direction. Thereby, the drum 22 rotates centering on the inclination axis inclined with respect to the horizontal direction.
  • the inclination angle of the outer cylinder 20 and the drum 22 can be set to about 10 to 20 degrees.
  • the opening 20a of the front surface of the outer cylinder 20 and the opening 22a of the front surface of the drum 22 face the input port 11, and are closed by the door 12 together with the input port 11.
  • a plurality of dewatering holes 22b are formed on the peripheral wall of the drum 22, a plurality of dewatering holes 22b are formed.
  • three lifting ribs 23 are provided at substantially equal intervals in the circumferential direction.
  • a rotating body 24 is rotatably disposed at a rear portion of the drum 22.
  • the rotating body 24 has a substantially disk shape.
  • a plurality of projecting portions 24a radially extending from the center portion are formed on the surface of the rotating body 24.
  • the rotating body 24 rotates coaxially with the drum 22.
  • a drive unit 30 that generates torque for driving the drum 22 and the rotating body 24 is disposed behind the outer cylinder 20.
  • the driving portion 30 makes the drum 22 and the rotating body 24 different during the washing process and the rinsing process.
  • the rotation speed rotates in the same direction.
  • the driving unit 30 rotates the drum 22 at a number of revolutions in which the centrifugal force applied to the laundry in the drum 22 is less than the gravity, and rotates the rotating body 24 at a number of revolutions faster than the number of rotations of the drum 22.
  • the driving unit 30 integrally rotates the drum 22 and the rotating body 24 with the centrifugal force of the laundry applied to the drum 22 being much larger than the rotational speed of gravity.
  • the detailed structure of the drive unit 30 will be described later.
  • a drain port portion 20b is formed at the bottom of the outer cylinder 20.
  • the drain port portion 20b is provided with a drain valve 40.
  • the drain valve 40 is connected to the drain hose 41. When the drain valve 40 is opened, the water stored in the outer cylinder 20 is discharged to the outside through the drain hose 41.
  • a detergent box 50 is disposed in the front upper portion of the casing 10.
  • the detergent container 50a containing the detergent is accommodated in the detergent box 50 so as to be freely extracted from the front.
  • the detergent box 50 is connected to the water supply valve 51 disposed at the rear upper portion in the casing 10 through the water supply hose 52. Further, the detergent box 50 is connected to the upper portion of the outer cylinder 20 through a water injection pipe 53.
  • the water supply valve 51 is opened, tap water from the faucet is supplied into the outer cylinder 20 through the water supply hose 52, the detergent box 50, and the water injection pipe 53. At this time, the detergent contained in the detergent container 50a is supplied into the outer cylinder 20 along the water flow.
  • FIG. 2 and 3 are cross-sectional views showing the configuration of the drive unit 30.
  • FIG. 2 shows a state in which the driving form of the driving unit 30 is switched to the two-axis driving mode
  • FIG. 3 shows a state in which the driving form of the driving unit 30 is switched to the single-axis driving mode.
  • FIG. 4 is a front view showing the rotor 110 of the structure of the rotor 110 of the drive motor 100.
  • FIG. 5 is an enlarged perspective view of the rear portion of the bearing unit 500 in which the splines 503 are formed.
  • 6(a) to 6(c) are views showing a configuration of a clutch body 610 of the clutch mechanism portion 600, which are respectively a front view, a right side view, and a rear view of the clutch body 610.
  • the drive unit 30 includes a drive motor 100, a first rotating shaft 200, a second rotating shaft 300, a planetary gear mechanism 400, a bearing unit 500, and a clutch mechanism unit 600.
  • the drive motor 100 is an outer rotor type DC brushless motor that generates torque for driving the rotating body 24 and the drum 22.
  • the drive motor 100 includes a rotor 110 and a stator 120.
  • the rotor 110 is formed in a bottomed cylindrical shape, and permanent magnets 111 are arranged on the inner circumferential surface thereof over the entire circumference.
  • a circular protrusion 112 fixed to the second rotating shaft 300 is formed at a central portion of the rotor 110.
  • An annular engaged concave portion 113 is formed in the protruding portion 112. As shown in FIG. 4, the outer peripheral surface of the engaged recessed portion 113 has irregularities over the entire circumference. Part 113a.
  • the stator 120 has a coil 121 at the outer peripheral portion. When power is supplied from the motor drive unit to be described later to the coil 121 of the stator 120, the rotor 110 rotates.
  • the first rotating shaft 200 has a hollow shape, and includes a second rotating shaft 300 and a planetary gear mechanism 400.
  • the central portion of the first rotating shaft 200 is bulged outward, and the bulged portion constitutes a housing portion of the planetary gear mechanism 400.
  • the planetary gear mechanism 400 decelerates and transmits the rotation of the second rotating shaft 300, that is, the rotation of the rotor 110 of the drive motor 100, to the first rotating shaft 200.
  • the planetary gear mechanism 400 includes a sun gear 410, an annular internal gear 420 surrounding the sun gear 410, a plurality of sets of planet wheels 430 interposed between the sun gear 410 and the internal gear 420, and a planet rotatably holding the planetary gears 430 Rack 440.
  • the sun gear 410 is fixed to the second rotating shaft 300, and the internal gear 420 is fixed to the first rotating shaft 200.
  • a set of planet wheels 430 includes a first gear and a second gear that mesh with each other and rotate in opposite directions.
  • the planet carrier 440 includes a planet carrier shaft 441 that extends rearward. The carrier shaft 441 is coaxial with the first rotating shaft 200, and is internally hollow to be inserted for the second rotating shaft 300.
  • the rear end portion of the second rotating shaft 300 protrudes rearward from the carrier shaft 441 and is fixed to the protruding portion 112 of the rotor 110.
  • the bearing unit 500 rotatably supports the first rotating shaft 200 through two bearings 501, 502 provided inside. As shown in FIG. 5, at the rear end portion of the bearing unit 500, a spline 503 is formed on the inner surface over the entire circumference.
  • the bearing unit 500 is fixed to the rear surface of the outer cylinder 20, and in this state, the first rotating shaft 200 and the second rotating shaft 300 enter the inside of the outer cylinder 20.
  • the drum 22 is fixed to the first rotating shaft 200, and the rotating body 24 is fixed to the second rotating shaft 300.
  • the clutch mechanism unit 600 switches the driving form of the driving unit 30 between the two-axis driving mode in which the rotating body 24 is rotated at a higher rotational speed than the drum 22, and the single-shaft driving mode.
  • the uniaxial driving form is a driving form in which the drum 22 and the rotating body 24 are integrally rotated to rotate the drum 22 and the rotating body 24 at the same number of revolutions.
  • the biaxial drive mode corresponds to the first drive mode of the present invention
  • the uniaxial drive mode corresponds to the second drive mode of the present invention.
  • the clutch mechanism portion 600 includes a clutch body 610, a clutch spring 620, a clutch lever 630, a lever support portion 640, a clutch driving device 650, and a relay bar 660.
  • the clutch body 610 has a substantially disk shape.
  • an annular spline 611 is formed on the outer peripheral surface.
  • the spline 611 is formed to engage with the spline 503 of the bearing unit 500.
  • a flange portion 612 is formed on the outer circumferential surface of the clutch body 610 behind the spline 611.
  • an annular engagement flange portion 613 is formed at the rear end portion.
  • the engagement flange portion 613 has the same shape as the engaged concave portion 113 of the rotor 110, and has an uneven portion 613a over the entire circumference of the outer peripheral portion. When the engagement flange portion 613 is inserted into the engaged recessed portion 113, the uneven portions 613a and 113a are engaged with each other.
  • the planet carrier shaft 441 is inserted into the shaft hole 614 of the clutch body 610.
  • the spline 614a formed on the inner circumferential surface of the shaft hole 614 is engaged with the spline 441a formed on the outer circumferential surface of the carrier shaft 441.
  • the clutch body 610 is movable in the front-rear direction with respect to the carrier shaft 441, but cannot be rotated in the circumferential direction.
  • an annular receiving groove 615 is formed outside the shaft hole 614, and the receiving groove 615 houses a clutch spring 620.
  • One end of the clutch spring 620 is in contact with the rear end portion of the bearing unit 500, and the other end is in contact with the bottom surface of the receiving groove 615.
  • a pressing portion 631 that comes into contact with the rear surface of the flange portion 612 of the clutch body 610 and pushes the flange portion 612 forward is formed.
  • the clutch lever 630 is rotatably supported by a support shaft 641 provided on the lever support portion 640.
  • a mounting shaft 632 is formed at a lower end portion of the clutch lever 630.
  • the clutch driving device 650 is disposed below the clutch lever 630.
  • the clutch driving device 650 includes a torque motor 651 and a disk-shaped cam 652 that is rotated about a horizontal axis by the torque of the torque motor 651.
  • a cam shaft 653 is provided on the outer peripheral portion. The center of rotation of the cam 652 and the center of the mounting shaft 632 of the clutch lever 630 are aligned in the front-rear direction.
  • the relay bar 660 extends in the up-down direction and connects the clutch lever 630 and the cam 652.
  • the upper end portion of the relay bar 660 is attached to the mounting shaft 632 of the clutch lever 630, and the lower end portion is attached to the cam shaft 653 of the cam 652.
  • a spring 661 is integrally formed at an intermediate position of the relay bar 660.
  • the cam 652 When the driving form of the driving unit 30 is switched from the single-axis driving mode to the two-axis driving mode, as shown in FIG. 2, the cam 652 is rotated by the torque motor 651 so that the cam shaft 653 is positioned at the lowest position. As the cam 652 rotates, the lower end portion of the clutch lever 630 is pulled downward by the relay bar 660. Clutch The lever 630 is rotated forward about the support shaft 641, and the pressing portion 631 pushes the clutch body 610 forward. The clutch body 610 moves forward against the elastic force of the clutch spring 620, and the splines 611 of the clutch body 610 are engaged with the splines 503 of the bearing unit 500.
  • the clutch body 610 When the cam shaft 653 is moved to a predetermined position in the middle, the clutch body 610 reaches a position where the spline 611 is engaged with the spline 503. At this time, the spring 661 of the relay bar 660 is in a state of natural length. Since the clutch body 610 does not move to a position closer to the front than the engagement position, when the cam shaft 653 is moved from the predetermined position to the lowest position, as shown in FIG. 2, the spring 661 is extended downward. As described above, since the clutch lever 630 is pulled by the spring 661 to rotate forward, the clutch body 610 at the engagement position is biased by the pressing portion 631. Thereby, the spline 611 and the spline 503 can be tightly engaged.
  • the carrier shaft 441 of the planetary gear mechanism 400 that is, the carrier 440 is fixed so as not to be rotatable. status.
  • the second rotating shaft 300 rotates at a rotational speed equal to the rotational speed of the rotor 110, and the rotating body 24 coupled to the second rotating shaft 300 is also equal to the rotational speed of the rotor 110.
  • the rotation speed is rotated.
  • the sun gear 410 of the planetary gear mechanism 400 rotates.
  • the carrier 440 since the carrier 440 is in a fixed state, the first gear and the second gear of the planetary gear 430 are respectively rotated in the opposite direction and the same direction as the sun gear 410, and the internal gear 420 is rotated in the same direction as the sun gear 410.
  • the first rotating shaft 200 fixed to the internal gear 420 rotates in the same direction as the second rotating shaft 300 at a rotational speed slower than the second rotating shaft 300
  • the drum 22 fixed to the first rotating shaft 200 is slower than the rotating body 24.
  • the rotational speed rotates in the same direction as the rotating body 24.
  • the rotating body 24 rotates in the same direction as the drum 22 at a rotational speed faster than the drum 22.
  • the cam 652 passes through the torque motor 651 so that the cam shaft 653 is positioned at the top. Rotate.
  • the spring 661 is contracted.
  • the relay bar 660 moves upward, and the lower end portion of the clutch lever 630 is pushed by the relay bar 660 to move upward.
  • the clutch lever 630 rotates rearward about the support shaft 641, and the pressing portion 631 is separated from the flange portion 612 of the clutch body 610.
  • the clutch body 610 is moved rearward by the elastic force of the clutch spring 620, and the engagement flange portion 613 of the clutch body 610 is engaged with the engaged concave portion 113 of the rotor 110.
  • the clutch body 610 When the engagement flange portion 613 and the engaged recess portion 113 are engaged, since the clutch body 610 cannot rotate in the circumferential direction with respect to the rotor 110, the clutch body 610 is in a state of being rotatable together with the rotor 110. In such a state, when the rotor 110 rotates, the second rotating shaft 300 and the clutch body 610 rotate at a rotational speed equal to the rotational speed of the rotor 110. At this time, in the planetary gear mechanism 400, the sun gear 410 and the carrier 440 rotate at the same rotational speed as the rotor 110.
  • the internal gear 420 rotates at the same rotational speed as the sun gear 410 and the carrier 440, and the first rotating shaft 200 fixed to the internal gear 420 rotates at a rotation speed equal to that of the rotor 110. That is, in the drive unit 30, the second rotating shaft 300, the planetary gear mechanism 400, and the first rotating shaft 200 rotate integrally. Thereby, the drum 22 and the rotating body 24 rotate integrally.
  • FIG. 7 is a block diagram showing the configuration of the drum type washing machine 1.
  • the drum type washing machine 1 further includes a control unit 701, a storage unit 702, an operation unit 703, a water level sensor 704, a motor drive unit 705, a water supply drive unit 706, a drain drive unit 707, a clutch drive unit 708, and Door lock device 709.
  • the operation unit 703 includes a power button 703a, a start button 703b, and a mode selection button 703c.
  • the power button 703a is a button for turning on and off the power of the drum type washing machine 1.
  • the start button 703b is a button for starting the operation.
  • the mode selection button 703c is a button for selecting an arbitrary washing mode from among a plurality of washing modes of the washing operation.
  • the operation unit 703 outputs an input signal corresponding to the button operated by the user to the control unit 701.
  • the water level sensor 704 detects the water level in the outer cylinder 20, and outputs a water level detection signal corresponding to the detected water level to the control unit 701.
  • the motor drive unit 705 drives the drive motor 100 based on a control signal from the control unit 701.
  • the motor drive unit 705 includes a rotation sensor 705a that detects the number of rotations of the drive motor 100, an inverter circuit, and the like, so that the drive motor 100 adjusts the drive current so as to rotate at the target number of revolutions set by the control unit 701.
  • the rotation sensor 705a corresponds to the detection unit of the present invention.
  • the water supply driving unit 706 drives the water supply valve 51 based on a control signal from the control unit 701.
  • the drain drive unit 707 drives the drain valve 40 based on a control signal from the control unit 701.
  • the clutch drive 650 includes a first detection sensor 654 and a second detection sensor 655.
  • the first detecting sensor 654 detects that the driving form of the driving unit 30 is switched to the biaxial driving mode and detects The signal is output to the control unit 701.
  • the second detecting sensor 655 detects that the driving form of the driving unit 30 is switched to the single-axis driving mode, and outputs a detection signal to the control unit 701.
  • the clutch drive unit 708 drives the torque motor 651 based on the detection signals from the first detection sensor 654 and the second detection sensor 655 based on the control signal output from the control unit 701.
  • the door lock device 709 performs locking and unlocking of the door 12 in accordance with a control signal from the control unit 701.
  • the storage unit 702 includes an EEPROM, a RAM, and the like.
  • the storage unit 702 stores a program for executing a washing operation of various washing operation modes. Further, the storage unit 702 stores various parameters and various control flags for executing these programs.
  • the control unit 701 controls the motor drive unit 705, the water supply drive unit 706, the drain drive unit 707, the clutch drive unit 708, and the door lock device based on the signals from the operation unit 703, the water level sensor 704, and the like based on the program stored in the storage unit 702. 709 and so on.
  • the drum type washing machine 1 performs a washing operation in various operation modes in accordance with an operation of the operation unit 703 by the user.
  • the washing process, the intermediate dehydration process, the rinsing process, and the final dehydration process are sequentially performed. It should be noted that depending on the operation mode, sometimes more than two intermediate dehydration processes and rinsing processes are performed.
  • the driving form of the driving unit 30 is switched to the two-axis driving mode.
  • the water in the outer cylinder 20 is stored in the outer cylinder 20 so as not to be in a predetermined water level at the lower edge of the inlet port 11, and in this state, the drive motor 100 alternately performs right rotation and left rotation in such a manner that the laundry in the drum 22 is immersed in water.
  • the drum 22 and the rotating body 24 alternately perform the right rotation and the left rotation in a state in which the rotation speed of the rotary body 24 is faster than the rotation speed of the drum 22.
  • the drum 22 is rotated by the centrifugal force of the laundry acting on the drum 22 to be smaller than the gravity.
  • the laundry in the drum 22 is lifted up by the lifting ribs 23 and falls to the inner circumferential surface of the drum 22.
  • the laundry contacts the projecting portion 24a of the rotating rotating body 24, and is rubbed and stirred by the protruding portion 24a. Thereby, the laundry is washed or rinsed.
  • the drive form of the drive unit 30 is switched to the uniaxial drive mode.
  • Driving the motor 100 that is, the drum 22 and the rotating body 24 to act on the laundry in the drum 22
  • the centrifugal force becomes much more rotational than the high speed of gravity.
  • the laundry is pressed against the inner peripheral surface of the drum 22 by the action of centrifugal force to be dehydrated.
  • FIG. 8 is a flowchart showing the control operation of the control unit 701 in the washing process and the rinsing process.
  • FIG. 9 is a flowchart showing a control operation of the distributed control by the control unit 701.
  • Fig. 10 (a) is a view schematically showing a state in which the entangled laundry gathers in the center portion of the drum 22, and the rotator 24 is pressed between the door 12 and the rotator 24,
  • Fig. 10 (b) is a view schematically showing a state in which the laundry collected in the center portion of the drum 22 is dispersed on the inner peripheral surface side of the drum 22 by performing the dispersion control.
  • control operation of the control unit 701 in the washing process and the rinsing process will be described with reference to FIGS. 8 to 10(b).
  • the control unit 701 switches the driving form of the driving unit 30 from the uniaxial driving mode to the biaxial driving mode by the clutch mechanism unit 600 (S101).
  • the control unit 701 performs water supply to the inside of the outer cylinder 20 (S102). That is, the control unit 701 opens the water supply valve 51 to supply water into the outer cylinder 20, and when the water level in the outer cylinder 20 reaches a predetermined water level, the water supply valve 51 is closed to stop the water supply in the outer cylinder 20.
  • the control unit 701 sets the target number of rotations of the drive motor 100 that causes the rotation speed of the drum 22 to be 45 rpm (S103).
  • the target rotational speed of the drive motor 100 is set to 240 rpm, which is decelerated by the planetary gear mechanism 400 to 45 rpm.
  • the control unit 701 controls the motor drive unit 705 to supply drive power to the drive motor 100, and causes the drive motor 100 to rotate right at the set target rotational speed (S106).
  • the control unit 701 normally obtains the rotation speed of the drive motor 100 detected by the rotation sensor 705a before the rotation speed of the drive motor 100 has risen to the predetermined timing of the target rotation speed, for example, 5 seconds before the drive motor 100 is stopped. S105).
  • the obtained rotational speed is stored in the storage unit 702. Under normal conditions, the obtained rotational speed is basically the target rotational speed.
  • the control unit 701 stops the drive motor 100 (S107). Then, when 5 seconds elapse after the drive motor 100 is stopped (S108: YES), The control unit 701 controls the motor drive unit 705 to supply drive power to the drive motor 100, and causes the drive motor 100 to rotate left at the target number of revolutions (S109). The control unit 701 acquires the number of revolutions of the drive motor 100 at the same timing as step S105 (S110).
  • the control unit 701 stops the drive motor 100 (S112). Then, when the drive motor 100 has stopped for 5 seconds (S113: YES), the control unit 701 determines whether or not the number of rotations of both the right rotation and the left rotation stored in the storage unit 702 is equal to or smaller than a predetermined threshold (S114).
  • a predetermined ratio with respect to the target rotational speed for example, a rotational speed of about 90% can be set as a threshold value. For example, in the case where the target rotational speed is 240 rpm, the threshold is set to 220 rpm.
  • step S104 When the number of rotations of at least one of the right rotation and the left rotation is not equal to or less than the predetermined threshold (S114: NO), when the operation time set for washing or rinsing has not elapsed (S115: NO), the flow returns to step S104.
  • the control unit 701 again rotates the drive motor 100 to the right and left, and acquires the number of revolutions of the drive motor 100 during this period (S104 to S113).
  • step S114 when the control unit 701 determines that the number of rotations of both the right rotation and the left rotation is equal to or less than the threshold value (S114: YES), the control unit 701 performs dispersion control (S116).
  • the dispersion control is equivalent to the mitigation control of the present invention.
  • control unit 701 first switches the driving form of the driving unit 30 from the biaxial driving mode to the single-axis driving mode by the clutch mechanism unit 600 (S201). Next, the control unit 701 sets the drum The rotational speed of 22 is the target rotational speed of the drive motor 100 at 120 rpm (S202).
  • the control unit 701 controls the motor drive unit 705 to supply drive power to the drive motor 100 such that the drive motor 100 performs right rotation at the set target rotational speed (S203).
  • the drum 22 is rotated substantially at 120 rpm.
  • the centrifugal force acting on the laundry becomes larger than the gravity. Therefore, as shown in FIG. 10(b), the laundry collected in the central portion in the drum 22 is pushed to the outside by the centrifugal force, and is dispersed to the inner peripheral surface side of the drum 22. Thereby, the pressing of the laundry to the rotating body 24 is eliminated, and the load applied to the rotating body 24 is alleviated.
  • the control unit 701 stops the drive motor 100 (S205). Then, the control unit 701 switches the driving form of the driving unit 30 from the single-axis driving mode to the two-axis driving mode (S206). In this way, the decentralized control ends.
  • step S115: NO the control unit 701 returns to step S104, and causes the drive motor 100 to perform the right rotation and the left rotation again, and detects the rotation speed during this period (S104 to S113). .
  • the steps S104 to S116 are repeated until the running time for washing or rinsing has elapsed.
  • control unit 701 opens the drain valve 40 and drains water from the inside of the outer cylinder 20 (S117). When the drainage is over, the washing process or the rinsing process ends.
  • the dispersion control is performed to reduce the load applied to the rotating body 24. Thereby, it can suppress that the drive motor 100 is locked.
  • the present embodiment since it is judged whether or not the load applied to the rotating body 24 becomes large in accordance with the rotational speed of the drive motor 100 detected by the rotation sensor 705a, it is not necessary to provide a dedicated sensor for the determination, and the cost can be prevented. Increase and so on.
  • the load applied to the rotating body 24 exceeds a predetermined size and is shifted to the dispersion control, and thus even
  • the rotation body 24 and the drive motor 100 have a difference in the ease of rotation during the right rotation and the left rotation, and it is also possible to accurately determine in the drive unit 30 that the load applied to the rotary body 24 becomes large.
  • the drum 22 can be rotated by the centrifugal force of the laundry acting on the drum 22 to be greater than the gravity, and the laundry collected at the center portion can be caused by the dispersion control. It is dispersed on the inner peripheral surface side of the drum 22, so that the load applied to the rotating body 24 can be effectively alleviated.
  • the drum 22 when the drum 22 is rotated during the dispersion control, since the driving form of the driving unit 30 is switched to the single-axis driving mode, the torque of the driving motor 100 required is smaller than that in the case of the biaxial driving mode. Thereby, the rotation of the drum 22 is easily raised to a rotation speed at the time of dispersion control higher than that at the time of washing or rinsing.
  • FIG. 11 and FIG. 12 are cross-sectional views showing a configuration of a drive unit 30A according to Modification 1.
  • FIG. 11 shows a state in which the driving form of the driving unit 30A is switched to the two-axis driving mode
  • FIG. 12 shows a state in which the driving form of the driving unit 30A is switched to the uniaxial driving mode.
  • the speed reducing mechanism constituted by the belt and the pulley is used to realize the drum 22
  • the configuration of the drive unit 30A of the present modification will be described in detail.
  • the drive unit 30A includes a drive motor 100A, a first rotating shaft 200A, a second rotating shaft 300A, a bearing unit 400A, a drum reduction mechanism unit 500A, a wing reduction mechanism unit 600A, and a clutch mechanism unit 700A.
  • the drive motor 100A is, for example, an inner rotor type DC brushless motor that generates torque for driving the drum 22 and the rotating body 24.
  • the motor shaft 110A of the drive motor 100A extends rearward.
  • the first rotating shaft 200A has a hollow shape, and rotatably encloses the second rotating shaft 300A.
  • the front portion of the second rotating shaft 300A protrudes forward from the first rotating shaft 200A, and the rear portion of the second rotating shaft 300A protrudes rearward from the first rotating shaft 200A.
  • a drum 22 is fixed to the first rotating shaft 200A, and the second rotation is performed.
  • a rotating body 24 is fixed to the shaft 300A.
  • the bearing unit 400A is fixed to the rear surface of the outer cylinder 20, and rotatably supports the first rotating shaft 200A via the two bearings 401A and 402A provided inside.
  • the drum speed reduction mechanism portion 500A includes a first pulley 510A, a first motor pulley 520A, and a first transmission belt 530A, and decelerates the rotation of the drive motor 100A and transmits it to the first rotation shaft 200A.
  • the first pulley 510A is fixed to the rear end portion of the first rotating shaft 200A.
  • An annular engaged concave portion 511A is formed on the rear surface of the first pulley 510A.
  • a spline 512A is formed over the entire circumference on the outer circumferential surface of the engaged concave portion 511A.
  • the first motor pulley 520A is mounted at the root of the motor shaft 110A of the drive motor 100A.
  • the first belt 530A is disposed between the first pulley 510A and the first motor pulley 520A.
  • the wing reduction mechanism portion 600A includes a second pulley 610A, a second motor pulley 620A, and a second transmission belt 630A, and decelerates the rotation of the drive motor 100A and transmits it to the second rotation shaft 300A.
  • the second pulley 610A is coupled to the second rotating shaft 300A via the two bearings 611A and 612A, and is rotatably supported by the second rotating shaft 300A.
  • An annular engaged concave portion 613A is formed on the front surface of the second pulley 610A.
  • a spline 614A is formed over the entire circumference on the outer circumferential surface of the engaged recess 613A.
  • the second motor pulley 620A is attached to the tip end portion of the motor shaft 110A of the drive motor 100A.
  • the second transmission belt 630A is disposed between the second pulley 610A and the second motor pulley 620A.
  • the outer diameter of the first motor pulley 520A is equal to the outer diameter of the second motor pulley 620A, the outer diameter of the second pulley 610A is smaller than the outer diameter of the first pulley 510A, and thus the reduction ratio of the wing reduction mechanism portion 600A is The reduction ratio of the drum reduction mechanism unit 500A is small.
  • the clutch mechanism unit 700A switches the driving form of the driving unit 30A between the two-axis driving mode and the single-axis driving mode, wherein the two-axis driving mode means that the rotation energy of the second pulley 610A is transmitted to the second rotating shaft 300A.
  • the second rotating shaft 300A and the second pulley 610A are coupled to each other to drive the rotating body 24 at a rotational speed faster than the drum 22.
  • the uniaxial driving mode means that the rotation of the first pulley 510A is enabled.
  • the second rotating shaft 300A and the first pulley 510A are coupled to the second rotating shaft 300A so that the drum 22 and the rotating body 24 are rotated at the same rotational speed.
  • the clutch mechanism portion 700A includes a clutch guide portion 710A, a clutch body 720A, a clutch lever 730A, a lever support portion 740A, and a clutch drive device 750A.
  • the clutch guide portion 710A and the clutch body 720A are disposed between the first pulley 510A and the second pulley 610A.
  • the clutch guide portion 710A has a cylindrical shape in which the front surface is opened, and is fixed to the second rotating shaft 300A so as not to be movable in the axial direction and the circumferential direction of the second rotating shaft 300A.
  • the clutch body 720A includes a clutch portion 721A, an enclosure portion 722A, and a bearing 723A.
  • the clutch portion 721A has a cylindrical shape in which the front surface and the rear surface are opened.
  • a front spline 724A and a rear spline 725A are formed over the entire circumference in the front portion and the rear portion, respectively.
  • the clutch guide portion 710A is inserted into the inside of the clutch portion 721A.
  • the inner circumferential surface of the clutch portion 721A and the outer circumferential surface of the clutch guide portion 710A are spline-coupled, and the clutch portion 721A is movable to the second rotation shaft 300A with respect to the clutch guide portion 710A, that is, the second rotation shaft 300A to which the clutch guide portion 710A is fixed. Moves in the direction of the axis but does not rotate.
  • the surrounding portion 722A is formed in an annular shape, and surrounds the central portion of the clutch portion 721A so that the clutch portion 721A is freely rotatable. Between the clutch portion 721A and the surrounding portion 722A, a bearing 723A is provided to smoothly rotate the clutch portion 721A with respect to the surrounding portion 722A.
  • the clutch lever 730A is coupled to the surrounding portion 722A so as to be rotatable relative to the surrounding portion 722A. Further, the clutch lever 730A is rotatably supported by a support shaft 741A provided on the lever support portion 740A.
  • the clutch drive 750A includes an actuator 751A and an operating lever 752A.
  • the actuator 751A moves the operating lever 752A forward and backward.
  • the operating lever 752A is coupled to the lower end portion of the clutch lever 730A.
  • the lower end portion of the clutch lever 730A is rotatable relative to the operating lever 752A.
  • the operating lever 752A When the driving form of the driving unit 30A is switched from the single-axis driving mode to the two-axis driving mode, as shown in FIG. 11, the operating lever 752A is pushed forward from the inside of the actuator 751A.
  • the lower end portion of the clutch lever 730A is urged to move forward by the operating lever 752A, and the clutch lever 730A is rotated rearward about the spindle 741A.
  • the upper end portion of the clutch lever 730A moves rearward, and the clutch body 720A is pushed rearward by the upper end portion of the clutch lever 730A.
  • the rear spline 725A of the clutch portion 721A is engaged with the spline 614A of the second pulley 610A.
  • the rotation of the drive motor 100A is transmitted to the first rotating shaft 200A via the drum reduction mechanism portion 500A, and the drum 22 fixed to the first rotating shaft 200A is rotated.
  • the drum 22 is rotated at a number of revolutions of the drive motor 100A in accordance with the number of revolutions at which the reduction ratio of the drum speed reduction mechanism portion 500A is lowered.
  • the rotary body 24 rotates in the same direction as the drum 22 at a rotation speed faster than the drum 22.
  • the clutch lever 730A is coupled to the surrounding portion 722A in which the clutch portion 721A is coupled in a freely rotatable state, even if the clutch portion 721A rotates, the torque generated by the rotation is hardly transmitted to the clutch lever 730A.
  • the operating lever 752A is pulled in toward the inside of the actuator 751A. That is, the operating lever 752A moves rearward.
  • the lower end portion of the clutch lever 730A is pulled rearward by the operating lever 752A, and the clutch lever 730A is rotated forward about the spindle 741A.
  • the upper end portion of the clutch lever 730A moves forward, and the clutch body 720A is pushed forward by the upper end portion of the clutch lever 730A.
  • the front spline 724A of the clutch portion 721A is engaged with the spline 512A of the first pulley 510A.
  • the second pulley 610A when the drive motor 100A rotates, the second pulley 610A also rotates in accordance with the rotation. However, the second pulley 610A is only idling with respect to the second rotation shaft 300A, and the rotation of the second pulley 610A is not transmitted to the second rotation shaft 300A.
  • the dispersion control is performed when the number of rotations of the drive motor 100 when the right and left rotation is equal to or less than the threshold value. That is, it is judged whether or not the load applied to the rotating body 24 is large according to the number of revolutions of the drive motor 100.
  • the present invention is not limited thereto.
  • a current sensor that detects a current flowing to the drive motor 100 may be provided, and dispersion control may be performed when the magnitude of the current flowing to the drive motor 100 is equal to or greater than a predetermined threshold. That is, the magnitude of the load applied to the rotating body 24 may be determined based on the magnitude of the current flowing to the driving motor 100.
  • the dispersion control is performed when both of the rotational speeds of the drive motor 100 in the right rotation and the left rotation are equal to or less than the threshold value.
  • the present invention is not limited thereto.
  • the dispersion control may be performed when the number of rotations of at least one of the right rotation and the left rotation is equal to or less than the threshold value.
  • the control unit 701 may be configured to acquire only one of the number of revolutions without acquiring the number of revolutions.
  • the drum 22 is rotated only once in the right in the dispersion control.
  • the drum 22 is rotated only once to the left.
  • the drum 22 may be rotated right or left several times.
  • the drum 22 may be rotated one or more times to the left and right.
  • the dispersion control is performed in the case where both the washing process and the rinsing process are performed when the rotational speed of the drive motor 100 is equal to or less than the threshold value when the drum 22 is rotated to the right and left.
  • a control action can also be performed only in one of the washing process or the rinsing process.
  • the rotational speed of the drive motor 100 is detected by the rotation sensor 705a.
  • the configuration in which the control unit 701 detects the number of rotations without using the detection method of the rotation sensor 705a may be employed.
  • the control unit 701 corresponds to the detecting unit of the present invention.
  • the drum 22 is rotated about the tilt axis that is inclined with respect to the horizontal direction.
  • the drum type washing machine 1 may be configured such that the drum 22 rotates around the horizontal axis.
  • drum type washing machine 1 of the above embodiment does not have a drying function
  • the present invention can also be applied to a drum type washing and drying machine which is a drum type washing machine having a drying function.
  • control unit 701 a control unit

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)

Abstract

一种滚筒式洗衣机，其可望防止因打结等而导致驱动电机锁止。滚筒式洗衣机(1)具备：外筒(20)，配置在机壳(10)内；滚筒(22)，配置在外筒(20)内，并能以倾斜轴为中心进行旋转；旋转体(24)，配置在滚筒(22)内，表面具有与洗涤物接触的突状部(24a)；驱动部(30)，包括驱动电机，并将该驱动电机的转矩传递给滚筒(22)以及旋转体(24)，使滚筒(22)和旋转体(24)以相互不同的转速旋转；以及控制部，控制驱动部(30)的动作。在洗涤过程和/或漂洗过程中，在施加给旋转体(24)的负荷的大小超过规定大小的情况下，控制部进行用于减轻该负荷的分散控制。

Description

滚筒式洗衣机 技术领域
本发明涉及一种滚筒式洗衣机。该滚筒式洗衣机既可以连续地进行从洗衣到干衣的运转，也可以只进行洗衣而不进行干衣。
背景技术
以往，滚筒式洗衣机使横轴式的滚筒在底部蓄有水的外筒内旋转，并由设置在滚筒内的提升筋(baffle)将洗涤物举起落下，将洗涤物摔到滚筒的内周面，由此对洗涤物进行洗涤。在像这样通过提升筋来搅拌洗涤物的结构中，洗涤物彼此之间很难互相缠绕或互相摩擦。因此，在滚筒式洗衣机中，为了提高清洗性能，可以采用在滚筒的后表面设置搅拌体，并在洗进行清洗、漂洗时，使滚筒与搅拌体以不同的转速独立旋转的结构(参照专利文献1)。
现有技术文献
专利文献
专利文献1：日本特开2015-167663号公报
发明内容
发明所要解决的问题
由于上述滚筒式洗衣机在洗涤、漂洗时，搅拌体以不同于滚筒转速的转速进行旋转，因此洗涤物容易在滚筒内打结，洗涤物容易发生打结。
发明人观察了滚筒内的洗涤物的活动，发现当发生这样的打结时，产生了如下的洗涤物的活动：在滚筒内由于搅拌体的旋转，缠在一起的洗涤物纠缠到搅拌体的中央部，并被推到搅拌体的轴线上。当产生这样的洗涤物的活动时，根据投入滚筒内的洗涤物的量等，缠在一起的洗涤物有可能聚集到滚筒的中心部分，呈大量的洗涤物堆积压缩在覆盖滚筒前表面的门与搅拌体之间的状态。如此一来，存在下述隐患：容易对搅拌体施加由洗涤物产生的大的负荷，导致 驱动搅拌体的驱动电机锁止。
本发明是鉴于该问题而完成的发明，其目的在于，提供一种滚筒式洗衣机，其可望防止因打结等而导致驱动电机锁止。
用于解决问题的方案
本发明的主要方式的滚筒式洗衣机具备：外筒，配置在机壳内；滚筒，配置在所述外筒内，并能以水平轴或相对于水平方向倾斜的倾斜轴为中心进行旋转；旋转体，配置在所述滚筒内，表面具有与洗涤物接触的突状部；驱动部，包括驱动电机，并将该驱动电机的转矩传递给所述滚筒以及所述旋转体，使所述滚筒和所述旋转体以相互不同的转速旋转；以及控制部，控制所述驱动部的动作。此处，所述控制部在洗涤过程和/或漂洗过程中，在施加给所述旋转体的负荷大小超过规定大小的情况下，进行用于减轻该负荷的减轻控制。
根据上述结构，在滚筒内因洗涤物打结等而使施加给旋转体的负荷超过规定大小的情况下，进行减轻控制，将施加给旋转体的负荷减轻。由此，可望防止驱动电机锁止。
本方式的滚筒式洗衣机还可以具备检测所述驱动电机的转速的检测部。在这种情况下，所述控制部在使所述旋转体旋转时，调整对所述驱动电机的供电，以使所述驱动电机以目标转速进行旋转，并在此时的所述驱动电机的转速为低于所述目标转速的阈值以下的情况下，进行所述减轻控制。
根据上述结构，由于施加给旋转体的负荷是否变大的判断是根据驱动电机的转速进行的，因而不需要为该判断而设置专用的传感器，能防止成本增加等。
在采用上述结构的情况下，还可以采用如下结构：所述控制部使所述驱动电机右旋转和左旋转，并在双方的旋转过程中所述驱动电机的转速为所述阈值以下的情况下，进行所述减轻控制。
根据这样的结构，在驱动部中，即使旋转体、驱动电机在右旋转和左旋转的过程中存在旋转容易度的差别，也能精确地判断出施加给旋转体的负荷变大的情况发生。
本方式的滚筒式洗衣机可以采用如下结构：作为所述减轻控制，所述控制部以使所述滚筒以作用于所述滚筒内的洗涤物的离心力比重力大的转速进行旋转的方式，使所述驱动电机旋转。
根据上述结构，即使出现了在滚筒内因打结而缠在一起的洗涤物聚集在滚筒的中心部，呈大量的洗涤物堆积压缩在滚筒前表面与旋转体之间的状态，导致对旋转体施加大的负荷的状况，通过减轻控制，也能使滚筒以作用于滚筒内的洗涤物的离心力大于重力的转速旋转，并由此将聚集在中心部的洗涤物分散到滚筒的内周面侧。由此，能有效地减轻施加给旋转体的负荷。
在采用上述结构的情况下，进一步地可以采用如下结构：所述驱动部可切换为第一驱动形态和第二驱动形态，其中，第一驱动形态是使所述滚筒和所述旋转体以相互不同的转速旋转的驱动形态，第二驱动形态是使所述滚筒和所述旋转体以相互相等的转速一体旋转的驱动形态。在这种情况下，所述控制部在所述第二驱动形态下，以使所述滚筒以作用于所述滚筒内的洗涤物的离心力大于重力的转速进行旋转的方式，使所述驱动电机旋转。
当采用这样的结构时，由于在减轻控制中使滚筒旋转时，驱动部的驱动形态切换至第二驱动形态，因而所需的驱动电机的转矩比第一驱动形态的情况小。由此，滚筒的旋转容易升高到比洗涤、漂洗时高的减轻控制时的转速。
发明效果
根据本发明，可望防止因打结等而导致驱动电机锁止。
本发明的效果以及意义通过如下所示的实施方式的说明来进一步明确。但是，以下的实施方式只是实施本发明时的一个例示，本发明不受以下的实施方式所述内容的任何限制。
附图说明
图1是表示实施方式所涉及的滚筒式洗衣机的结构的侧剖图。
图2是表示实施方式所涉及的驱动部的结构的剖视图。
图3是表示实施方式所涉及的驱动部的结构的剖视图。
图4是表示实施方式所涉及的驱动电机的转子的结构的转子的主视图。
图5是实施方式所涉及的形成有花键的轴承单元的后部的放大立体图。
图6的(a)至(c)是表示实施方式所涉及的离合器机构部的离合器体的结构的图。
图7是表示实施方式所涉及的滚筒式洗衣机的结构的框图。
图8是表示实施方式所涉及的在洗涤过程以及漂洗过程中通过控制部进行 的控制动作的流程图。
图9是表示实施方式所涉及的通过控制部进行的分散控制的控制动作的流程图。
图10的(a)是示意性地表示实施方式所涉及的缠在一起的洗涤物聚集在滚筒的中心部，旋转体被堆积在门与旋转体之间的洗涤物压迫的样子的图，图10的(b)是示意性地表示实施方式所涉及的通过进行分散控制，使聚集在滚筒的中心部的洗涤物分散到滚筒的内周面侧的样子的图。
图11是表示变更例1所涉及的驱动部的结构的剖视图。
图12是表示变更例1所涉及的驱动部的结构的剖视图。
具体实施方式
以下，参照附图，对本发明的滚筒式洗衣机的一实施方式即不具有干衣功能的滚筒式洗衣机进行说明。
图1是表示滚筒式洗衣机1的结构的侧剖图。
滚筒式洗衣机1具备构成外观的机壳10。机壳10的前表面10a从中央部倾斜到上部，在倾斜的面上形成有洗涤物的投入口11。投入口11由自由开闭的门12遮盖。
在机壳10内，外筒20由多个减振器21弹性支承。在外筒20内，自由旋转地配置有滚筒22。外筒20以及滚筒22以后表面侧相对于水平方向变低的方式倾斜。由此，滚筒22以相对于水平方向倾斜的倾斜轴为中心进行旋转。外筒20以及滚筒22的倾斜角度可以设定为10～20度左右。外筒20的前表面的开口部20a以及滚筒22的前表面的开口部22a与投入口11对置，并与投入口11一起由门12来关闭。在滚筒22的周壁，形成有许多个脱水孔22b。进而，在滚筒22的内周面，沿周向以大致相等的间隔设置有三个提升筋23。
在滚筒22的后部，自由旋转地配置有旋转体24。旋转体24具有大致圆盘形状。在旋转体24的表面，形成有从中央部呈放射状延伸的多个突状部24a。旋转体24与滚筒22同轴旋转。
在外筒20的后方，配置有产生驱动滚筒22以及旋转体24的转矩的驱动部30。驱动部30在洗涤过程以及漂洗过程时，使滚筒22以及旋转体24以不同的 转速同向旋转。具体地说，驱动部30使滚筒22以施加给滚筒22内的洗涤物的离心力小于重力的转速进行旋转，并使旋转体24以比滚筒22的转速快的转速进行旋转。另一方面，驱动部30在脱水过程时，使滚筒22以及旋转体24以施加给滚筒22内的洗涤物的离心力远远大于重力的转速一体旋转。驱动部30的详细结构随后进行说明。
在外筒20的底部形成有排水口部20b。排水口部20b设置有排水阀40。排水阀40与排水软管41连接。当排水阀40打开时，蓄于外筒20内的水就会通过排水软管41向机外排出。
在机壳10内的前方上部配置有洗涤剂盒50。收容有洗涤剂的洗涤剂容器50a从前方自由抽出地收容于洗涤剂盒50。洗涤剂盒50通过给水软管52与配置在机壳10内的后方上部的给水阀51连接。此外，洗涤剂盒50通过注水管53与外筒20的上部连接。当给水阀51打开时，来自水龙头的自来水通过给水软管52、洗涤剂盒50以及注水管53被供给至外筒20内。此时，收容在洗涤剂容器50a中的洗涤剂顺着水流被供给至外筒20内。
接着，对驱动部30的结构进行详细说明。
图2以及图3是表示驱动部30的结构的剖视图。图2表示驱动部30的驱动形态被切换到双轴驱动形态的状态，图3表示驱动部30的驱动形态被切换到单轴驱动形态的状态。图4是表示驱动电机100的转子110的结构的转子110的主视图。图5是形成有花键503的轴承单元500的后部的放大立体图。图6(a)至(c)是表示离合器机构部600的离合器体610的结构的图，分别为离合器体610的主视图、右视图以及后视图。
驱动部30包括：驱动电机100、第一旋转轴200、第二旋转轴300、行星齿轮机构400、轴承单元500以及离合器机构部600。
驱动电机100是外转子型的DC无刷电机，产生用于驱动旋转体24以及滚筒22的转矩。驱动电机100包括转子110和定子120。转子110形成为有底的圆筒状，在其内周面遍及整周地排列有永磁铁111。在转子110的中央部形成有固定于第二旋转轴300的圆形的突起部112。在突起部112，形成有环状的被卡合凹部113。如图4所示，被卡合凹部113内的外侧的周面遍及整周地具有凹凸 部113a。定子120在外周部具有线圈121。当从后述的电机驱动部供电至定子120的线圈121时，转子110旋转。
第一旋转轴200具有中空形状，内包第二旋转轴300和行星齿轮机构400。第一旋转轴200的中央部向外侧膨出，该膨出的部位构成行星齿轮机构400的收容部。
行星齿轮机构400将第二旋转轴300的旋转即驱动电机100的转子110的旋转减速并传递给第一旋转轴200。行星齿轮机构400包括：太阳轮410、包围太阳轮410的环状的内齿轮420、介于太阳轮410和内齿轮420之间的多组行星轮430以及自由旋转地保持这些行星轮430的行星架440。
太阳轮410固定在第二旋转轴300，内齿轮420固定在第一旋转轴200。一组行星轮430包括相互啮合并反向旋转的第一齿轮和第二齿轮。行星架440包括向后方延伸的行星架轴441。行星架轴441与第一旋转轴200同轴，并且内部形成为中空以供第二旋转轴300插入。
第二旋转轴300的后端部从行星架轴441向后方突出，并固定在转子110的突起部112。
轴承单元500通过设置于内部的两个轴承501、502，可旋转地支承第一旋转轴200。如图5所示，在轴承单元500的后端部，在内表面，遍及整周地形成有花键503。轴承单元500固定在外筒20的后表面，在该状态下，第一旋转轴200以及第二旋转轴300进入外筒20的内部。滚筒22固定于第一旋转轴200，旋转体24固定于第二旋转轴300。
离合器机构部600在双轴驱动形态和单轴驱动形态之间切换驱动部30的驱动形态，其中，双轴驱动形态是以使旋转体24以比滚筒22快的转速进行旋转的方式使滚筒22和旋转体24独立旋转的驱动形态，单轴驱动形态是以使滚筒22和旋转体24以同一转速进行旋转的方式使滚筒22和旋转体24一体旋转的驱动形态。双轴驱动形态相当于本发明的第一驱动形态，单轴驱动形态相当于本发明的第二驱动形态。
离合器机构部600包括：离合器体610、离合器弹簧620、离合器杆630、杆支承部640、离合器驱动装置650、以及中继棒660。
如图6的(a)至(c)所示，离合器体610具有大致圆盘形状。在离合器体610的顶端部，在外周面，形成有环状的花键611。花键611形成为与轴承单元500的花键503卡合。此外，在离合器体610的外周面，在花键611的后方形成有凸缘部612。进而，在离合器体610，于后端部形成有环状的卡合凸缘部613。卡合凸缘部613具有与转子110的被卡合凹部113相同的形状，在外周部遍及整周地具有凹凸部613a。当卡合凸缘部613插入被卡合凹部113时，凹凸部613a、113a彼此卡合。
行星架轴441插入离合器体610的轴孔614。形成于轴孔614的内周面的花键614a与形成于行星架轴441的外周面的花键441a卡合。由此，离合器体610呈相对于行星架轴441能向前后方向移动，但无法向周向转动的状态。
在离合器体610，在轴孔614的外侧形成有环状的收容槽615，该收容槽615收容有离合器弹簧620。离合器弹簧620的一端与轴承单元500的后端部相接，另一端与收容槽615的底面相接。
在离合器杆630的上端部，形成有与离合器体610的凸缘部612的后表面接触，并将凸缘部612向前方推的推压部631。离合器杆630由设置于杆支承部640的支轴641自由转动地支承。在离合器杆630的下端部，形成有安装轴632。
离合器驱动装置650配置于离合器杆630的下方。离合器驱动装置650包括转矩电机651和通过转矩电机651的转矩绕水平轴旋转的圆盘状的凸轮652。在凸轮652的上表面，在外周部设置有凸轮轴653。凸轮652的旋转中心和离合器杆630的安装轴632的中心在前后方向上一致。
中继棒660向上下方向延伸，连结离合器杆630和凸轮652。中继棒660的上端部安装于离合器杆630的安装轴632，下端部安装于凸轮652的凸轮轴653。在中继棒660的中间位置一体地形成有弹簧661。
杆支承部640以及离合器驱动装置650例如经由未图示的安装板固定于轴承单元500。
在驱动部30的驱动形态从单轴驱动形态切换至双轴驱动形态的情况下，如图2所示，凸轮652通过转矩电机651，以使凸轮轴653位于最下方的方式被旋转。随着凸轮652旋转，离合器杆630的下端部被中继棒660拉向下方。离合 器杆630以支轴641为中心向前方旋转，推压部631向前方推动离合器体610。离合器体610抵抗离合器弹簧620的弹力向前方移动，离合器体610的花键611和轴承单元500的花键503卡合。
当凸轮轴653移动到中间的规定位置时，离合器体610到达花键611与花键503卡合的位置。这时，中继棒660的弹簧661处于自然长度的状态。由于离合器体610不会移动至比该卡合位置更靠近前方的位置，因此当凸轮轴653从规定位置移动至最下方的位置时，如图2所示，弹簧661伸长至下方。如此，由于离合器杆630被弹簧661以向前方转动的方式拉动，因此处于卡合位置的离合器体610被推压部631施加推压力。由此，能使花键611与花键503紧紧卡合。
当花键611和花键503卡合时，由于离合器体610呈相对于轴承单元500无法向周向转动的状态，因而行星齿轮机构400的行星架轴441即行星架440呈被固定成无法旋转的状态。在这样的状态下，当转子110旋转时，第二旋转轴300以与转子110的转速相等的转速进行旋转，并且与第二旋转轴300连结着的旋转体24也以与转子110的转速相等的转速进行旋转。随着第二旋转轴300的旋转，行星齿轮机构400的太阳轮410旋转。如上所述，由于行星架440处于被固定的状态，因此行星轮430的第一齿轮以及第二齿轮分别与太阳轮410逆向和同向旋转，内齿轮420与太阳轮410同向旋转。由此，固定于内齿轮420的第一旋转轴200以比第二旋转轴300慢的转速与第二旋转轴300同向旋转，固定于第一旋转轴200的滚筒22以比旋转体24慢的转速与旋转体24同向旋转。换言之，旋转体24以比滚筒22快的转速与滚筒22同向旋转。
另一方面，在驱动部30的形态从双轴驱动形态切换至单轴驱动形态的情况下，如图3所示，凸轮652通过转矩电机651，以使凸轮轴653位于最上方的方式被旋转。当凸轮652进行旋转，凸轮轴653向上方移动时，首先，弹簧661收缩。当弹簧661恢复到自然长度时，之后，随着凸轮轴653移动，中继棒660向上方移动，离合器杆630的下端部被中继棒660推动，向上方移动。离合器杆630以支轴641为中心向后方旋转，推压部631离开离合器体610的凸缘部612。离合器体610通过离合器弹簧620的弹力向后方移动，离合器体610的卡合凸缘部613和转子110的被卡合凹部113卡合。
当卡合凸缘部613和被卡合凹部113卡合时，由于离合器体610相对于转子110无法向周向转动，因而离合器体610呈能与转子110一起旋转的状态。在这样的状态下，当转子110旋转时，第二旋转轴300以及离合器体610以与转子110的转速相等的转速进行旋转。此时，在行星齿轮机构400中，太阳轮410和行星架440以与转子110相等的转速进行旋转。由此，内齿轮420以与太阳轮410以及行星架440相等的转速进行旋转，固定于内齿轮420的第一旋转轴200以与转子110相等的转速进行旋转。即，在驱动部30中，第二旋转轴300、行星齿轮机构400以及第一旋转轴200一体旋转。由此，滚筒22和旋转体24一体旋转。
图7是表示滚筒式洗衣机1的结构的框图。
滚筒式洗衣机1除了上述的结构之外，还具备：控制部701、存储部702、操作部703、水位传感器704、电机驱动部705、给水驱动部706、排水驱动部707、离合器驱动部708以及门锁装置709。
操作部703包括：电源按钮703a、开始按钮703b、以及模式选择按钮703c。电源按钮703a是用于接通和切断滚筒式洗衣机1的电源的按钮。开始按钮703b是用于使运转开始的按钮。模式选择按钮703c是用于从洗涤运转的多个洗涤模式中选择任意的洗涤模式的按钮。操作部703将与用户操作的按钮对应的输入信号输出给控制部701。
水位传感器704检测外筒20内的水位，并将与检测到的水位对应的水位检测信号输出给控制部701。
电机驱动部705根据来自控制部701的控制信号，驱动驱动电机100。电机驱动部705包括检测驱动电机100的转速的旋转传感器705a、变频电路等，以使驱动电机100以由控制部701设定的目标转速进行旋转的方式调整驱动电流。旋转传感器705a相当于本发明的检测部。
给水驱动部706根据来自控制部701的控制信号，驱动给水阀51。排水驱动部707根据来自控制部701的控制信号，驱动排水阀40。
离合器驱动装置650包括第一检测传感器654和第二检测传感器655。第一检测传感器654检测到驱动部30的驱动形态切换到了双轴驱动形态，并将检测 信号输出给控制部701。第二检测传感器655检测到驱动部30的驱动形态切换到了单轴驱动形态，并将检测信号输出给控制部701。离合器驱动部708基于来自第一检测传感器654和第二检测传感器655的检测信号并根据从控制部701输出的控制信号，驱动转矩电机651。
门锁装置709根据来自控制部701的控制信号进行门12的上锁以及解锁。
存储部702包括EEPROM、RAM等。存储部702存储有用于执行各种洗涤运转模式的洗涤运转的程序。此外，存储部702存储有用于执行这些程序的各种参数、各种控制标记。
控制部701基于来自操作部703、水位传感器704等的各信号，根据存储于存储部702的程序，控制电机驱动部705、给水驱动部706、排水驱动部707、离合器驱动部708、门锁装置709等。
滚筒式洗衣机1根据用户对操作部703的操作，进行各种运转模式的洗涤运转。在洗涤运转中，按顺序执行洗涤过程、中间脱水过程、漂洗过程以及最终脱水过程。需要说明的是，根据运转模式，有时候会进行两次以上的中间脱水过程和漂洗过程。
在洗涤过程以及漂洗过程中，驱动部30的驱动形态被切换到双轴驱动形态。以使滚筒22内的洗涤物浸入水中的方式，在外筒20内蓄水至不到投入口11的下缘的规定的水位，在该状态下，驱动电机100交替进行右旋转以及左旋转。由此，滚筒22和旋转体24以旋转体24的转速比滚筒22的转速快的状态交替进行右旋转以及左旋转。此时，滚筒22以作用于滚筒22内的洗涤物的离心力变得比重力小的转速进行旋转。
滚筒22内的洗涤物通过提升筋23被举起落下，摔到滚筒22的内周面。除此之外，在滚筒22的后部，洗涤物接触到旋转的旋转体24的突状部24a，被突状部24a摩擦、搅拌。由此，洗涤物被洗涤或者漂洗。
这样，在进行洗涤以及漂洗时，由于洗涤物被施加由滚筒22的旋转所产生的机械力，还被施加由旋转体24所产生的机械力，因此可望清洗性能的提高。在中间脱水过程以及最终脱水过程中，驱动部30的驱动形态被切换到单轴驱动形态。驱动电机100，即滚筒22以及旋转体24以作用于滚筒22内的洗涤物的 离心力变得远远比重力大的转速一体旋转。洗涤物通过离心力的作用被压向滚筒22的内周面而被脱水。
这样，在进行脱水时，由于滚筒22和旋转体24一体旋转，因此贴在滚筒22上的洗涤物无需被旋转体24搅拌就能良好地将洗涤物脱水。
图8是表示洗涤过程以及漂洗过程中的控制部701的控制动作的流程图。图9是表示控制部701的分散控制的控制动作的流程图。图10的(a)是示意性地表示缠在一起的洗涤物聚集在滚筒22的中心部，旋转体24被堆积在门12与旋转体24之间的洗涤物压迫的样子的图，图10的(b)是示意性地表示通过进行分散控制，聚集在滚筒22的中心部的洗涤物分散到滚筒22的内周面侧的样子的图。
以下，参照图8至图10的(b)，对洗涤过程以及漂洗过程中的控制部701的控制动作进行说明。
当洗涤过程或漂洗过程开始时，控制部701通过离合器机构部600将驱动部30的驱动形态从单轴驱动形态切换至双轴驱动形态(S101)。接着，控制部701对外筒20内进行给水(S102)。即，控制部701打开给水阀51对外筒20内供水，当外筒20内的水位达到规定水位时，关闭给水阀51停止对外筒20内的供水。
当给水结束时，控制部701设定使滚筒22的转速为45rpm的驱动电机100的目标转速(S103)。例如，将驱动电机100的目标转速设为240rpm，该目标转速通过行星齿轮机构400减速为45rpm。在滚筒22以45rpm进行旋转的情况下，作用于滚筒22内的洗涤物的离心力比重力小，洗涤物在滚筒22内翻滚。
控制部701控制电机驱动部705，对驱动电机100提供驱动电力，使驱动电机100以设定的目标转速进行右旋转(S106)。控制部701在正常情况下，在驱动电机100的转速已经升高到目标转速的规定的正时，例如驱动电机100停止的5秒前，取得通过旋转传感器705a检测到的驱动电机100的转速(S105)。取得的转速存储于存储部702。正常的情况下，取得的转速基本就是目标转速。
当使驱动电机100右旋转后经过20秒时(S106：是)，控制部701使驱动电机100停止(S107)。然后，当驱动电机100停止后经过5秒时(S108：是)， 控制部701控制电机驱动部705，对驱动电机100提供驱动电力，使驱动电机100以目标转速进行左旋转(S109)。控制部701在与步骤S105相同的正时取得驱动电机100的转速(S110)。
当使驱动电机100左旋转后经过20秒时(S111：是)，控制部701使驱动电机100停止(S112)。然后，当驱动电机100停止后经过5秒时(S113：是)，控制部701判断存储于存储部702的右旋转时和左旋转时的双方的转速是否为规定的阈值以下(S114)。可以将相对于目标转速的规定比例、例如九成左右的转速设为阈值。例如，在目标转速为240rpm的情况下，阈值设为220rpm。
在右旋转时和左旋转时的至少一方的转速不为规定阈值以下的情况下(S114：否)，当尚未经过为洗涤或漂洗而设定的运转时间时(S115：否)，返回步骤S104，控制部701再次使驱动电机100右旋转以及左旋转，并在此期间取得驱动电机100的转速(S104～S113)。
在洗涤、漂洗时，由于旋转体24以不同于滚筒22转速的转速进行旋转，因此洗涤物容易在滚筒22内打结，洗涤物容易发生打结。当发生这样的打结时，产生了如下的洗涤物的活动：在滚筒22内，由于旋转体24的旋转，缠在一起的洗涤物纠缠到旋转体24的中央部，并被推到旋转体24的轴线上。当产生这样的洗涤物的活动时，在投入到滚筒22内的洗涤物较多的情况下，如图10的(a)所示，可能呈如下的状态：缠在一起的洗涤物聚集在滚筒22的中心部分，大量的洗涤物堆积压缩在门12与旋转体24之间。这样一来，容易对旋转体24施加由洗涤物产生的大负荷。
这样，当由于滚筒22内的打结而产生洗涤物对旋转体24压迫的状态，并由此对旋转体24施加大的负荷时，即使提供最大的驱动电力，右旋转时和左旋转时的驱动电机100的转速也可能不会达到目标转速，而是为阈值以下。
在步骤S114中，控制部701在判断出右旋转时和左旋转时双方的转速为阈值以下时(S114：是)，进行分散控制(S116)。分散控制相当于本发明的减轻控制。
如图9所示，控制部701先通过离合器机构部600将驱动部30的驱动形态从双轴驱动形态切换至单轴驱动形态(S201)。接着，控制部701设定使滚筒 22的转速为120rpm的驱动电机100的目标转速(S202)。
控制部701控制电机驱动部705，对驱动电机100提供驱动电力，使得驱动电机100以设定的目标转速进行右旋转(S203)。由此，滚筒22大致以120rpm进行旋转。滚筒22内，作用于洗涤物的离心力变得比重力大。因此，如图10的(b)所示，聚集在滚筒22内的中心部分的洗涤物通过离心力被推到外侧，分散到滚筒22的内周面侧。由此，消除洗涤物对旋转体24的压迫，减轻施加给旋转体24的负荷。
当使驱动电机100右旋转后经过了120秒时(S204：是)，控制部701使驱动电机100停止(S205)。然后，控制部701将驱动部30的驱动形态从单轴驱动形态切换至双轴驱动形态(S206)。这样，分散控制结束。
当分散控制结束时，控制部701在运转时间尚未经过的情况下(S115：否)，返回步骤S104，再次使驱动电机100进行右旋转和左旋转，并在此期间检测转速(S104至S113)。这样，重复步骤S104至S116的导致直到经过了用于洗涤或漂洗的运转时间。
当经过了运转时间时(S115：是)，控制部701打开排水阀40，从外筒20内进行排水(S117)。当排水结束时，洗涤过程或漂洗过程结束。
(实施方式的效果)
根据本实施方式，在滚筒22内因洗涤物打结等而使施加给旋转体24的负荷超过规定的大小的情况下，进行分散控制，减轻施加给旋转体24的负荷。由此，能抑制驱动电机100被锁止的情况发生。
此外，根据本实施方式，由于判断施加给旋转体24的负荷是否变大是根据由旋转传感器705a检测到的驱动电机100的转速进行的，因而不需要为该判断设置专用的传感器，能防止成本增加等。
进而，根据本实施方式，由于在右旋转时和左旋转时的双方的转速为阈值以下的情况下，视为施加给旋转体24的负荷超过了规定的大小，并移至分散控制，因而即使旋转体24、驱动电机100在右旋转和左旋转的过程中存在旋转容易度的差别，也能在驱动部30中精确判断出施加给旋转体24的负荷变大的情况发生。
进而，根据本实施方式，即使由于在滚筒22内因打结而缠在一起的洗涤物聚集在滚筒22的中心部，呈大量的洗涤物堆积压缩在门12与旋转体24之间的状态，从而导致发生对旋转体24施加大的负荷的状况，也能通过分散控制，使滚筒22以作用于滚筒22内的洗涤物的离心力大于重力的转速旋转，并由此将聚集在中心部的洗涤物分散到滚筒22的内周面侧，因而能有效地减轻施加给旋转体24的负荷。
进而，根据本实施方式，在分散控制中使滚筒22旋转时，由于驱动部30的驱动形态切换至单轴驱动形态，因而所需的驱动电机100的转矩比双轴驱动形态的情况小。由此，滚筒22的旋转容易升高到比洗涤、漂洗时高的分散控制时的转速。
以上，对本发明的实施方式进行了说明，但本发明不受上述实施方式等的任何限制，另外，本发明的实施方式也可以进行上述以外的各种变更。
(变更例1)
图11以及图12表示变更例1所涉及的驱动部30A的结构的剖视图。图11表示驱动部30A的驱动形态被切换至双轴驱动形态的状态，图12表示驱动部30A的驱动形态被切换至单轴驱动形态的状态。
相对于在上述实施方式中使用行星齿轮机构400来实现使滚筒22与旋转体24之间具有速度差的结构，在本变更例中，使用由传动带和带轮构成的减速机构来实现使滚筒22与旋转体24之间具有速度差的结构。以下，对本变更例的驱动部30A的结构进行详细说明。
驱动部30A包括：驱动电机100A、第一旋转轴200A、第二旋转轴300A、轴承单元400A、滚筒减速机构部500A、翼减速机构部600A、以及离合器机构部700A。
驱动电机100A是例如内转子型的DC无刷电机，产生用于驱动滚筒22和旋转体24的转矩。驱动电机100A的电机轴110A向后方延伸。
第一旋转轴200A具有中空形状，可旋转地内包第二旋转轴300A。第二旋转轴300A的前部从第一旋转轴200A向前方突出，第二旋转轴300A的后部从第一旋转轴200A向后方突出。在第一旋转轴200A固定有滚筒22，在第二旋转 轴300A固定有旋转体24。
轴承单元400A固定于外筒20的后表面，通过设置于内部的两个轴承401A、402A，可旋转地对第一旋转轴200A进行支承。
滚筒减速机构部500A包括第一带轮510A、第一电机带轮520A、以及第一传动带530A，将驱动电机100A的旋转减速并传递给第一旋转轴200A。
第一带轮510A固定于第一旋转轴200A的后端部。在第一带轮510A的后表面，形成有环状的被卡合凹部511A。在被卡合凹部511A内的外侧的周面，遍及整周地形成有花键512A。
第一电机带轮520A安装在驱动电机100A的电机轴110A的根部。第一传动带530A架设在第一带轮510A与第一电机带轮520A之间。
翼减速机构部600A包括第二带轮610A、第二电机带轮620A、以及第二传动带630A，将驱动电机100A的旋转减速并传递给第二旋转轴300A。
第二带轮610A经由两个轴承611A、612A与第二旋转轴300A连结，自由旋转地支承在第二旋转轴300A。在第二带轮610A的前表面，形成有环状的被卡合凹部613A。在被卡合凹部613A内的外侧的周面，遍及整周地形成有花键614A。
第二电机带轮620A安装于驱动电机100A的电机轴110A的顶端部。第二传动带630A架设在第二带轮610A与第二电机带轮620A之间。
由于第一电机带轮520A的外径与第二电机带轮620A的外径相等，第二带轮610A的外径比第一带轮510A的外径小，因此翼减速机构部600A的减速比比滚筒减速机构部500A的减速比小。
离合器机构部700A在双轴驱动形态和单轴驱动形态之间切换驱动部30A的驱动形态，其中，双轴驱动形态是指通过以使第二带轮610A的旋转能传递给第二旋转轴300A的方式连结第二旋转轴300A和第二带轮610A，从而使旋转体24以比滚筒22快的转速进行旋转的驱动形态，单轴驱动形态是指通过以使第一带轮510A的旋转能传递给第二旋转轴300A的方式连结第二旋转轴300A和第一带轮510A，从而使滚筒22和旋转体24以同一转速进行旋转的驱动形态。
离合器机构部700A包括：离合器导向部710A、离合器体720A、离合器杆730A、杆支承部740A、以及离合器驱动装置750A。
离合器导向部710A以及离合器体720A配置在第一带轮510A与第二带轮610A之间。离合器导向部710A具有前表面打开的圆筒形状，并以在第二旋转轴300A的轴线方向以及周向上都不可动的方式固定在第二旋转轴300A。
离合器体720A包括离合器部721A、包围部722A、以及轴承723A。离合器部721A具有前表面以及后表面打开的圆筒形状。在离合器部721A的外周面，在前部以及后部分别遍及整周地形成有前花键724A以及后花键725A。
离合器导向部710A插入离合器部721A的内部。离合器部721A的内周面和离合器导向部710A的外周面通过花键结合，离合器部721A相对于离合器导向部710A即固定有离合器导向部710A的第二旋转轴300A能向第二旋转轴300A的轴线方向移动但不能旋转。
包围部722A形成为圆环状，以使离合器部721A自由旋转的方式包围离合器部721A的中央部。在离合器部721A与包围部722A之间，以使离合器部721A相对于包围部722A顺利地旋转的方式设置有轴承723A。
离合器杆730A以相对于包围部722A可旋转的方式，将其上端部与包围部722A连结。此外，离合器杆730A自由转动地支承在设置于杆支承部740A的支轴741A。
离合器驱动装置750A包括促动器751A和操作杆752A。促动器751A使操作杆752A向前后移动。操作杆752A与离合器杆730A的下端部连结。离合器杆730A的下端部相对于操作杆752A可旋转。
在驱动部30A的驱动形态从单轴驱动形态切换至双轴驱动形态的情况下，如图11所示，操作杆752A被从促动器751A的内部推向前方。离合器杆730A的下端部被操作杆752A推动向前方移动，离合器杆730A以支轴741A为中心向后方旋转。离合器杆730A的上端部向后方移动，离合器体720A被离合器杆730A的上端部推动向后方移动。由此，离合器部721A的后花键725A与第二带轮610A的花键614A卡合。
当后花键725A与花键614A卡合时，由于离合器部721A和第二带轮610A 在旋转方向上被固定，因此呈能将第二带轮610A的旋转经由离合器部721A以及离合器导向部710A传递给第二旋转轴300A的状态。在这样的状态下，当驱动电机100A旋转时，该旋转经由翼减速机构部600A传递给第二旋转轴300A，固定于第二旋转轴300A的旋转体24进行旋转。旋转体24以驱动电机100A的转速按照翼减速机构部600A的减速比降低后的转速进行旋转。此外，驱动电机100A的旋转经由滚筒减速机构部500A传递给第一旋转轴200A，固定于第一旋转轴200A的滚筒22进行旋转。滚筒22以驱动电机100A的转速按照滚筒减速机构部500A的减速比降低后的转速进行旋转。如上所述，由于翼减速机构部600A的减速比比滚筒减速机构部500A的减速比小，因此旋转体24以比滚筒22快的转速与滚筒22同向旋转。
需要说明的是，由于离合器杆730A与以自由旋转的状态连结有离合器部721A的包围部722A连结，因而即使离合器部721A进行旋转，该旋转产生的转矩也几乎不会传递给离合器杆730A。
另一方面，在驱动部30A的驱动形态从双轴驱动形态切换至单轴驱动形态的情况下，如图12所示，操作杆752A被向促动器751A的内部拉入。即，操作杆752A向后方移动。离合器杆730A的下端部被操作杆752A拉动向后方移动，离合器杆730A以支轴741A为中心向前方旋转。离合器杆730A的上端部向前方移动，离合器体720A被离合器杆730A的上端部推动向前方移动。由此，离合器部721A的前花键724A与第一带轮510A的花键512A卡合。
当前花键724A与花键512A卡合时，由于离合器部721A和第一带轮510A在旋转方向上被固定，因此呈能将第一带轮510A的旋转经由离合器部721A以及离合器导向部710A传递给第二旋转轴300A的状态。在这样的状态下，当驱动电机100A进行旋转时，该旋转经由滚筒减速机构部500A传递给第一旋转轴200A以及第二旋转轴300A，滚筒22以及旋转体24进行旋转。滚筒22以及旋转体24以驱动电机100A的转速按照滚筒减速机构部500A的减速比降低后的转速同向一体旋转。
需要说明的是，在单轴驱动形态下，当驱动电机100A进行旋转时，第二带轮610A也随着该旋转而进行旋转。但是，第二带轮610A仅仅是相对于第二旋转轴300A进行空转，第二带轮610A的旋转不会传递给第二旋转轴300A。
(其它的变更例)
在上述实施方式中，在左右旋转时的驱动电机100的转速为阈值以下的情况下进行分散控制。即，根据驱动电机100的转速来判断施加给旋转体24的负荷是否较大。但是，并不局限于此，例如，也可以设置检测流到驱动电机100的电流的电流传感器，并在流到驱动电机100的电流大小为规定阈值以上的情况下进行分散控制。即，也可以根据流到驱动电机100的电流大小来判断施加给旋转体24的负荷的大小。
此外，在上述实施方式中，在驱动电机100右旋转时和左旋转时的双方的转速为阈值以下的情况下进行分散控制。但是，并不局限于此，例如，也可以在右旋转时和左旋转时的至少一方的转速为阈值以下的情况下进行分散控制。此外，也可以采用控制部701不取得双方的转速，而是只取得某一方的转速的结构。
进而，在上述实施方式中，在分散控制中滚筒22只右旋转一次。但是，也可以是滚筒22只左旋转一次。此外，也可以是滚筒22右旋转或左旋转多次。进而，也可以是滚筒22向左右双方旋转一次或多次。
进而，在上述实施方式中，在洗涤过程和漂洗过程双方，在使滚筒22左右旋转时驱动电机100的转速为阈值以下的情况下进行分散控制。但是，这样的控制动作也可以只在洗涤过程或漂洗过程中的某一方进行。
进而，在上述实施方式中，通过旋转传感器705a来检测驱动电机100的转速。但是，也可以采用控制部701通过不使用旋转传感器705a的检测方式来检测转速的结构。在这种情况下，控制部701相当于本发明的检测部。
进而，在上述实施方式中，滚筒22以相对于水平方向倾斜的倾斜轴为中心进行旋转。但是，滚筒式洗衣机1也可以采用滚筒22以水平轴为中心进行旋转的结构。
进而，虽然上述实施方式的滚筒式洗衣机1不具备干衣功能，但是本发明也能用于具备干衣功能的滚筒式洗衣机即滚筒式洗衣干衣机。
此外，本发明的实施方式可以在技术方案所示出的技术思想的范围内适当地进行各种变更。
附图标记说明
10：机壳；
20：外筒；
22：滚筒；
24：旋转体；
24a：突状部；
30：驱动部；
100：驱动电机；
701：控制部；
705a：旋转传感器(检测部)。

Claims (5)

  1. 一种滚筒式洗衣机，其特征在于，具备：
    外筒，配置在机壳内；
    滚筒，配置在所述外筒内，并能以水平轴或相对于水平方向倾斜的倾斜轴为中心进行旋转；
    旋转体，配置在所述滚筒内，表面具有与洗涤物接触的突状部；
    驱动部，包括驱动电机，并将该驱动电机的转矩传递给所述滚筒以及所述旋转体，使所述滚筒和所述旋转体以相互不同的转速旋转；以及
    控制部，控制所述驱动部的动作，
    所述控制部在洗涤过程和/或漂洗过程中，在施加给所述旋转体的负荷大小超过规定大小的情况下，进行用于减轻该负荷的减轻控制。
  2. 根据权利要求1所述的滚筒式洗衣机，其特征在于，
    还具备：检测部，检测所述驱动电机的转速，
    所述控制部在使所述旋转体旋转时，调整对所述驱动电机的供电，以使所述驱动电机以目标转速进行旋转，并在此时的所述驱动电机的转速为低于所述目标转速的阈值以下的情况下进行所述减轻控制。
  3. 根据权利要求2所述的滚筒式洗衣机，其特征在于，
    所述控制部使所述驱动电机右旋转和左旋转，并在双方的旋转过程中所述驱动电机的转速为所述阈值以下的情况下进行所述减轻控制。
  4. 根据权利要求1至3的任一项所述的滚筒式洗衣机，其特征在于，
    作为所述减轻控制，所述控制部以使所述滚筒以作用于所述滚筒内的洗涤物的离心力比重力大的转速进行旋转的方式，使所述驱动电机旋转。
  5. 根据权利要求4所述的滚筒式洗衣机，其特征在于，
    所述驱动部可切换为第一驱动形态和第二驱动形态，其中，第一驱动形态是使所述滚筒和所述旋转体以相互不同的转速旋转的驱动形态，第二驱动形态 是使所述滚筒和所述旋转体以相互相等的转速一体旋转的驱动形态，
    所述控制部在所述第二驱动形态下，以使所述滚筒以作用于所述滚筒内的洗涤物的离心力大于重力的转速进行旋转的方式，使所述驱动电机旋转。
PCT/CN2016/110377 2015-12-16 2016-12-16 滚筒式洗衣机 WO2017101857A1 (zh)

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