WO2015196775A1 - 滚筒式洗衣机 - Google Patents

滚筒式洗衣机 Download PDF

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Publication number
WO2015196775A1
WO2015196775A1 PCT/CN2014/095723 CN2014095723W WO2015196775A1 WO 2015196775 A1 WO2015196775 A1 WO 2015196775A1 CN 2014095723 W CN2014095723 W CN 2014095723W WO 2015196775 A1 WO2015196775 A1 WO 2015196775A1
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WO
WIPO (PCT)
Prior art keywords
drum
motor
driving
drive
rotation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2014/095723
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English (en)
French (fr)
Inventor
辻贵裕
田中启之
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qingdao Haier Washing Machine Co Ltd
Haier Asia International Co Ltd
Original Assignee
Qingdao Haier Washing Machine Co Ltd
Haier Asia International Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qingdao Haier Washing Machine Co Ltd, Haier Asia International Co Ltd filed Critical Qingdao Haier Washing Machine Co Ltd
Publication of WO2015196775A1 publication Critical patent/WO2015196775A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F37/00Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/30Driving arrangements 

Definitions

  • the present invention relates to a drum type washing machine.
  • the drum type washing machine can be continuously performed from washing to drying, or can be washed without drying.
  • a drum type washing machine rotates a horizontal axis type drum in an outer tank in which water is stored in the bottom, and lifts the laundry by a baffle provided in the drum and drops it, by dropping the laundry The laundry is washed to the inner peripheral surface of the drum (refer to Patent Document 1).
  • the drum type washing machine is less likely to have a smaller mechanical force acting on the laundry than the fully automatic washing machine that rotates the pulsator in the washing and dewatering tank to wash the laundry, and the detergency performance is liable to be lowered.
  • a structure in which a stirring body is provided behind the drum and the drum and the stirring body are rotated at different rotation speeds during washing and rinsing can be employed.
  • a structure in which the rotation of the drive motor is decelerated by the speed reduction mechanism using the gear and transmitted to the drum can be further employed.
  • Patent Document 1 JP-A-2013-240577
  • the present invention has been made in view of the above problems, and an object of the invention is to reduce a rotation of a drive motor by a speed reduction mechanism using a gear to reduce the rotation of the drive motor and transmit the same to the drum. Abnormal sound.
  • a drum type washing machine includes an outer tub that is disposed in a casing, and a drum that is disposed in the outer tub and that is rotatable about a horizontal axis or an inclined axis that is inclined with respect to a horizontal direction.
  • a driving portion including a driving motor and a speed reducing mechanism that uses a gear to decelerate and transmit the rotation of the driving motor to the drum; a motor driving portion that supplies a driving current to the driving motor; and a control portion that controls the motor Drive unit.
  • the control unit controls the motor drive unit to gradually reduce the drive current supplied to the drive motor when the rotation of the drum decelerated by the speed reduction mechanism is stopped.
  • the motor drive unit may be configured to adjust a drive current according to a rotational speed of the drive motor set by the control unit.
  • the control unit sets the rotational speed of the drive motor to decrease the predetermined speed only for each predetermined time when the rotation of the drum after the deceleration mechanism is decelerated.
  • a rotating body may be further provided, and the rotating body is disposed at a rear portion of the drum and has a protruding portion that comes into contact with the laundry on the surface.
  • the driving unit further includes a configuration of a clutch mechanism unit that switches the driving form of the driving unit between the two-axis driving mode and the one-axis driving mode, and the two-axis driving mode is adopted by a speed reduction mechanism that decelerates the rotation of the drive motor and transmits the rotation to the drum, and causes the drum and the rotating body to respectively rotate at different rotation speeds, wherein the one-axis drive mode is not decelerated by the The mechanism decelerates the rotation of the drive motor and transmits it to the drum, and integrally rotates the drum and the rotating body at the same rotational speed.
  • the control unit is on the two axes In the driving mode, when the rotation of the drum is stopped, the motor driving unit is controlled to gradually reduce the driving current supplied to the driving motor, and in the one-axis driving mode, the rotation of the drum is stopped. At this time, the motor drive unit is controlled to immediately stop the supply of the drive current to the drive motor.
  • the driving form of the driving unit is switched to the two-axis driving mode, and not only the mechanical force generated by the rotation of the drum but also the mechanical force generated by the rotating body can be applied to the laundry.
  • the driving form is switched to the one-shaft driving mode, and the laundry attached to the drum can be stirred without being rotated, and the laundry can be dehydrated satisfactorily.
  • the motor drive unit in the two-axis drive mode in which the abnormal noise of the speed reduction mechanism is concerned, when the rotation of the drum is stopped, the motor drive unit is controlled to gradually reduce the drive current supplied to the drive motor, thereby reducing the drive current.
  • the abnormal noise of the speed reduction mechanism On the other hand, in the one-axis drive mode in which the abnormal noise of the speed reduction mechanism is not concerned, when the rotation of the drum is stopped, the motor drive unit is controlled to immediately stop the supply of the drive current to the drive motor, so that it is possible to prevent the drive from being stopped. The time required for the rotation of the desired drum to stop is prolonged.
  • the abnormal noise emitted from the speed reduction mechanism can be reduced when the drum is stopped.
  • 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 an embodiment.
  • FIG 3 is a cross-sectional view showing a configuration of a drive unit according to an embodiment.
  • FIG. 4 is a front view of a rotor showing a configuration of a rotor of a drive motor according to an embodiment.
  • Fig. 5 is an enlarged perspective view showing a rear portion of a rack-forming bearing unit according to the embodiment.
  • FIG. 6 is a view 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 flowchart showing a stop control process according to the embodiment.
  • FIG. 9 is a view schematically showing a change in the set speed and a change in the actual rotational speed of the drive motor in the case where the stop control process is performed according to the embodiment.
  • FIG. 10 is a view schematically showing a change in the actual rotational speed of the drive motor when the stop control process is performed in the case where the load amount is large and the load amount is small in the embodiment.
  • drum type washing machine which does not have a drying function as one embodiment of the drum type washing machine of the present invention will be described with reference to the drawings.
  • FIG. 1 is a side cross-sectional view showing a configuration 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 upward from the central portion, and an inlet 11 for washing is formed on the inclined surface.
  • the inlet 11 is covered by a door 12 that is freely opened and closed.
  • the outer tank 20 is elastically supported by a plurality of dampers 21.
  • the drum 22 is rotatably disposed in the outer tub 20.
  • the outer tub 20 and the drum 22 are inclined such that the rear side becomes lower with respect to 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 tub 20 and the drum 22 is set to about 10 to 20 degrees.
  • the opening 20a of the front surface of the outer tub 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 inner peripheral surface of the drum 22, a plurality of dewatering holes 22b are formed.
  • three baffles 23 are provided at substantially equal intervals in the circumferential direction.
  • the agitating body 24 is rotatably disposed at the rear of the drum 22 .
  • the agitating body 24 has a substantially disk shape.
  • the agitating body 24 rotates coaxially with the drum 22.
  • the agitating body 24 corresponds to the rotating body of the present invention, and the vane 24a corresponds to the protruding portion of the present invention.
  • a drive unit 30 that generates torque for driving the drum 22 and the agitating body 24 is disposed behind the outer tub 20.
  • the drive unit 30 corresponds to the drive unit of the present invention.
  • the driving unit 30 rotates the drum 22 and the stirring body 24 at different rotation speeds in the same direction.
  • the drive unit 30 rotates the drum 22 at a rotational speed at which the centrifugal force applied to the laundry in the drum 22 is less than gravity, and causes the agitating body 24 to rotate faster than the rotational speed of the drum 22. The speed is rotated.
  • the drive unit 30 integrally rotates the drum 22 and the agitating body 24 with a centrifugal force that is applied to the laundry in the drum 22 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 tub 20.
  • a drain valve 40 is provided in the drain port portion 20b.
  • the drain valve 40 is connected to the drain hose 41. When the drain valve 40 is opened, the water stored in the outer tank 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 tub 20 through a water injection pipe 53.
  • the water supply valve 51 is opened, tap water from the faucet is supplied into the outer tank 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 tub 20 along the water flow.
  • FIG. 2 and 3 are cross-sectional views showing the configuration of the drive unit 30.
  • 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 one-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 rack 514 is 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 wing shaft 200, a drum shaft 300, a planetary gear mechanism 400, a bearing unit 500, and a clutch mechanism portion 600.
  • the drive motor 100 generates torque for driving the agitating body 24 and the drum 22.
  • the wing shaft 200 is rotated by the torque of the drive motor 100, and the rotation is transmitted to the agitating body 24.
  • the planetary gear mechanism 400 decelerates the rotation of the wing shaft 200, that is, the rotation of the rotor 110 of the drive motor 100, and transmits it to the drum shaft 300.
  • the planetary gear mechanism 400 corresponds to the speed reduction mechanism of the present invention.
  • the drum shaft 300 rotates coaxially with the wing shaft 200 at a rotational speed decelerated by the planetary gear mechanism 400, and transmits the rotation to the drum 22.
  • the bearing unit 500 supports the wing shaft 200 and the drum shaft 300 in a freely rotatable manner.
  • the clutch mechanism unit 600 switches the driving form of the driving unit 30 between the two-axis driving mode in which the agitating body 24, that is, the wing shaft 200, and the rotational speed of the driving motor 100 are switched.
  • the rotation speed is rotated at an equal speed, and the drum 22, that is, the drum shaft 300, is rotated at a rotation speed decelerated by the planetary gear mechanism 40, and the one-axis drive mode is
  • the agitating body 24 and the drum 22, that is, the wing shaft 200, the drum shaft 300, and the planetary gear mechanism 400 can be integrally rotated at a rotation speed equal to that of the drive motor 100.
  • the drive motor 100 is an outer rotor type DC brushless motor including 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 boss portion 112 is formed at a central portion of the rotor 110.
  • a boss hole 113 for fixing the wing shaft 200 is formed in the boss portion 112, and an annular engaged recess 114 is formed on the outer circumference of the boss hole 113.
  • the outer peripheral portion of the engaged recessed portion 114 has the uneven portion 114a over the entire circumference.
  • the stator 120 has a coil 121 at the outer peripheral portion.
  • a drive current is supplied to the coil 121 of the stator 120 from a motor drive unit to be described later, the rotor 110 rotates.
  • the drum shaft 300 has a hollow shape and encloses the wing shaft 200 and the planetary gear mechanism 400.
  • the center portion of the drum shaft 300 is bulged outward, and the bulged portion constitutes a housing portion of the planetary gear mechanism 400.
  • 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 planetary gears 430 interposed between the sun gear 410 and the internal gear 420, and a planet that rotatably holds the planetary gears 430 Carrier 440.
  • the sun gear 410 is fixed to the wing shaft 200, and the internal gear 420 is fixed to the drum shaft 300.
  • a set of planet gears 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 carrier shaft 441 that extends rearward.
  • the carrier shaft 441 is coaxial with the drum shaft 300, and is internally hollow to allow the wing shaft 200 to be inserted.
  • the rear end portion of the wing shaft 200 protrudes rearward from the carrier shaft 441 and is fixed to the boss hole 113 of the rotor 110.
  • a cylindrical bearing portion 510 is provided at the center portion. Inside the bearing portion 510, rollers 511 and 512 are provided at the front and rear portions, and a mechanical seal 513 is provided at the front end portion. The outer peripheral surface of the drum shaft 300 is supported by the rollers 511, 512 and smoothly rotates in the bearing portion 510. In addition, intrusion of water between the bearing portion 510 and the drum shaft 300 is prevented by the mechanical seal 513. As shown in FIG. 5, a rack 514 is formed on the inner surface of the rear end portion of the bearing portion 510 over the entire circumference.
  • a fixing flange portion 520 is formed around the bearing portion 510.
  • a mounting boss 521 is formed at a lower end portion of the fixing flange portion 520.
  • the bearing unit 500 is fixed to the rear of the outer tub 20 by a fixing method such as a fastening screw or the like.
  • a fixing method such as a fastening screw or the like.
  • the clutch mechanism unit 600 includes a clutch body 610, a clutch spring 620, a clutch lever 630, a lever support portion 640, a clutch drive device 650, a joint bar 660, and a mounting plate 670.
  • the clutch body 610 has a substantially disk shape.
  • An annular rack 611 is formed on the outer peripheral surface of the front end portion of the clutch body 610.
  • the rack 611 is formed to be engaged with the rack 514 of the bearing unit 500.
  • a flange portion 612 is formed on the outer circumferential surface of the clutch body 610 behind the rack 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 114 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 114, the uneven portions 613a, 114a are engaged with each other.
  • the carrier shaft 441 is inserted into the shaft hole 614 of the clutch body 610.
  • the rack 614a formed on the inner peripheral surface of the shaft hole 614 is engaged with the rack 441a formed on the outer peripheral surface of the carrier shaft 441.
  • the clutch body 610 is in a state in which the movement in the front-rear direction is permitted with respect to the carrier shaft 441, and the rotation in the circumferential direction is restricted.
  • an annular receiving groove 615 is formed outside the shaft hole 614, and a clutch spring 620 is housed in the receiving groove 615.
  • One end of the clutch spring 620 is in contact with the rear end portion of the bearing portion 510, 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 at the upper end portion of the clutch lever 630.
  • 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 engagement bar 660 extends in the up and down direction and connects the clutch lever 630 and the cam 652.
  • the upper end portion of the engagement 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 engagement bar 660.
  • the spring 661 is a tension spring.
  • the lever support portion 640 and the clutch drive device 650 are fixed to the mounting plate 670 by a fixing method such as a fastening screw.
  • the mounting plate 670 is fixed to the mounting boss 521 of the bearing unit 500 by screws.
  • the cam 652 When the driving form of the drive unit 30 is switched from the one-axis drive mode to the two-axis drive 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 engagement bar 660. The clutch lever 630 rotates 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 rack 611 of the clutch body 610 and the rack 514 of the bearing unit 500 are engaged.
  • the rack 611 When the cam shaft 653 of the clutch body 610 is moved to a predetermined position in the middle, the rack 611 reaches a position where it is engaged with the rack 514. At this time, the spring 661 of the engagement rod 660 is in a state of natural length. Since the clutch body 610 does not move to a position further forward 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. In this way, since the clutch lever 630 is pulled by the spring 661 so as to rotate forward, a pressing force is applied from the pressing portion 631 to the clutch body 610 at the engagement position. Thereby, the rack 611 can be tightly engaged with the rack 514.
  • the carrier shaft 441 of the planetary gear mechanism 400 that is, the planetary gear
  • the frame 440 is in a state of being fixed in a non-rotatable manner.
  • the wing shaft 200 rotates at a rotational speed equal to the rotational speed of the rotor 110, and the agitating body 24 coupled to the wing shaft 200 also rotates at the same speed as the rotational speed of the rotor 110. The speed is rotated.
  • the sun gear 410 rotates in the planetary gear mechanism 400.
  • the carrier 440 since the carrier 440 is in a fixed state, the first gear and the second gear of the planetary gear 430 rotate in the same direction and in the opposite direction to the sun gear 410, respectively, and the internal gear 420 rotates in the same direction as the sun gear 410.
  • the drum shaft 300 fixed to the internal gear 420 is in the same direction as the wing shaft 200, and is rotated at a rotation speed slower than the wing shaft 200, and the drum 22 fixed to the drum shaft 300 is slower than the agitating body 24.
  • the rotation speed is rotated in the same direction as the agitating body 24.
  • the agitating body 24 rotates in the same direction as the drum 22 at a rotational speed faster than the drum 22.
  • the cam 652 is rotated by the torque motor 651 so that the cam shaft 653 is positioned at the top.
  • the spring 661 is contracted.
  • the engagement bar 660 moves upward, and the lower end portion of the clutch lever 630 is pushed by the engagement bar 660 to move upward.
  • the clamp 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 and the engaged concave portion 114 of the rotor 110 are engaged.
  • the internal gear 420 rotates at a rotation speed equal to that of the sun gear 410 and the carrier 440, and the drum shaft 300 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 wing shaft 200, the planetary gear mechanism 400, and the drum shaft 300 are integrally rotated. Thereby, the drum 22 and the agitating 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 program 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 operation program from among a plurality of operation programs related to 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 tank 20, and outputs a water level detection signal corresponding to the detected water level to the control unit 701.
  • the motor drive unit 705 supplies a drive current to the drive motor 100 based on a control signal from the control unit 701.
  • the motor drive unit 705 has a speed sensor that detects the rotational speed of the drive motor 100, an inverter circuit, and the like, and adjusts the drive current to rotate the drive motor 100 at the rotational speed set by the control unit 701.
  • PWM control is used as motor drive control.
  • the control unit 701 applies a pulse voltage of a duty ratio determined based on the detected rotation speed to the drive motor 100, thereby supplying a drive current corresponding to the pulse voltage to the drive motor 100.
  • the feed water driving unit 706 supplies a drive current to the water valve based on a control signal from the control unit 701. 51.
  • the drain drive unit 707 supplies a drive current to 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 two-axis driving mode, and outputs a detection signal to the control unit 701.
  • the second detecting sensor 655 detects that the driving form of the driving unit 30 is switched to the one-axis driving mode, and outputs a detection signal to the control unit 701.
  • the clutch drive unit 708 supplies a drive current to the torque motor 651 based on a detection signal from the first detection sensor 654 and the second detection sensor 655 based on a 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.
  • a program for executing a washing operation of various washing operation programs is stored in the storage unit 702. Further, various parameters and various control flags for execution of these programs are stored in the storage unit 702.
  • 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 respective programs 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 of various operation programs in accordance with a selection operation by a user based on the program selection button 703c.
  • the washing step, the intermediate dehydration step, the rinsing step, and the final dehydration step are sequentially performed. Further, depending on the operation procedure, there are cases where the intermediate dehydration step and the rinsing step are performed twice or more.
  • the driving form of the drive unit 30 is switched to the two-axis drive mode.
  • the water is stored in the outer tank 20 to a predetermined water level below the lower edge of the inlet port 11 so that the laundry in the drum 22 is immersed in the water.
  • the drive motor 100 alternately performs forward rotation and reverse rotation.
  • the drum 22 and the agitating body 24 alternately rotate forward and reverse in a state in which the rotational speed of the agitating body 24 is faster than the rotational speed of the drum 22.
  • the drum 22 is rotated by a centrifugal force that acts on the laundry to be smaller than the gravity.
  • the laundry in the drum 22 is lifted up by the baffle 23 and falls, and falls to the inner peripheral surface of the drum 22.
  • the laundry contacts the blade 24a of the rotating agitating body 24, and the laundry is rubbed by the blade 24a, and the laundry is stirred by the blade 24a. Thereby, the laundry is washed or rinsed.
  • the driving form of the drive unit 30 is switched to the one-axis drive mode.
  • the driving motor 100 that is, the drum 22 and the agitating body 24, are rotated integrally with the centrifugal force of the laundry acting on the drum 22 so far as to be far greater than the gravity.
  • the laundry is pressed against the inner peripheral surface of the drum 22 by the action of centrifugal force to be dehydrated.
  • the drum 22 and the agitating body 24 rotate integrally, the laundry adhered to the drum 22 can be dehydrated favorably without being stirred by the agitating body 24.
  • the planetary gear mechanism 400 is used to decelerate the rotation of the drive motor 100 and transmit it to the drum 22.
  • the drive motor 100 in the two-axis drive mode, when the energization of the drive motor 100 is immediately stopped when the drive motor 100 is stopped, the drive motor 100 is intended to be stopped but the drum 22 is intended to be inertia. The rotation continues, and as a result, a large impact is applied to the respective gears of the planetary gear mechanism 400, so that a large abnormal noise is easily emitted from the planetary gear mechanism 400.
  • the control unit 701 executes a stop control process for reducing the abnormal noise emitted from the planetary gear mechanism 400.
  • the stop control process will be described in detail.
  • Fig. 8 is a flowchart showing a stop control process.
  • the control unit 701 sets the rotational speed set as the target rotational speed, that is, the rotational speed at the time of operation of the drive motor 100, for example, at the time of the washing process, to the rotational speed suitable for washing of the laundry, and only lowers the predetermined speed.
  • the speed reduction V0 (S101).
  • the speed reduction V0 can be set to a rotation speed of a fraction to a tenth of a rotation speed at the time of operation.
  • the control unit 701 controls the motor drive unit 705 to adjust the drive current supplied to the drive motor 100 so that the rotational speed of the drive motor 100 is a new set speed (S102).
  • the control unit 701 determines whether or not the maintenance time T0 has elapsed since the update of the set speed (S103).
  • the sustain time T0 is a time set in advance to maintain a new set speed, and is set, for example, from several hundred milliseconds to several milliseconds.
  • the control unit 701 determines whether or not the set speed is zero based on the next speed drop (S104). Then, when the set speed is not zero (S104: NO), the control unit 701 returns to step S101 to again decrease the set speed only by the deceleration V0.
  • step S104 the processes of steps S101 to S103 are repeated until the next The speed is lowered, and the judgment that the set speed is zero is established.
  • the control unit 701 determines that the set speed is zero based on the next speed decrease (S104: YES)
  • the supply of the drive current to the drive motor 100 is stopped (S105).
  • the stop control process ends.
  • FIGS. 9(a) and 9(b) are diagrams schematically showing changes in the set speed and changes in the actual rotational speed of the drive motor 100 when the stop control process of FIG. 8 is performed.
  • the drive motor 100 repeats the forward rotation and the reverse rotation at a washing speed suitable for washing and a rinsing speed suitable for rinsing.
  • the set speed is sequentially reduced by the deceleration V0 for each sustain time T0. Therefore, when the drive motor 100 is stopped, the drive current supplied to the drive motor 100 does not immediately become zero, but gradually decreases.
  • the drive motor 100 reduces the rotational speed while It will arrive shortly afterwards.
  • the control unit 701 controls the motor driving unit 705 without stopping the control process of FIG. 8 when the rotation of the driving motor 100 is stopped when the drum 22 is stopped. The supply of the drive current to the drive motor 100 is immediately stopped. Thereby, in the one-axis drive mode, it is possible to prevent the time required to stop the rotation of the unnecessary drum 22 from being extended.
  • the drive motor 100 when the drive motor 100 is operated in the two-axis drive mode, when the drive motor 100 is stopped, the drive motor 100 is controlled so that the rotation speed is gradually lowered. Since the stop is reached, the impact applied to the planetary gear mechanism 400 can be reduced when the drive motor 100 is stopped, and the occurrence of abnormal noise of the planetary gear mechanism 400 can be reduced.
  • the drum 22 when the drum 22 is suddenly stopped, the drum 22 is likely to vibrate. However, according to the above embodiment, the drum 22 can be stopped slowly, so that the occurrence of vibration can be suppressed.
  • the setting is made.
  • the speed is reduced by a fixed speed motor control for each fixed time.
  • the same time causes the rotational speed of the drive motor 100 to decrease. Thereby, the occurrence of abnormal noise of the planetary gear mechanism 400 can be favorably reduced without being affected by the amount of load or the like.
  • the rotor 110 of the drive motor 100 is directly coupled to the agitating body 24 via the wing shaft 200, and the agitating body 24 is rotated at a rotational speed equal to the rotational speed of the drive motor 100.
  • the speed reduction mechanism using the gear may be interposed between the agitating body 24 and the drive motor 100 similarly to the drum 22. In this case, by making the reduction ratio of the speed reduction mechanism used in the agitating body 24 smaller than the reduction ratio of the planetary gear mechanism 400, the agitating body 24 can be rotated faster than the drum 22.
  • 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 machine having a drying function, that is, a drum type drying washing machine.

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  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
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Abstract

一种滚筒式洗衣机,其具备:外槽(20),配置在壳体(10)内;滚筒(22),自由旋转地配置在外槽(20)内;驱动单元(30),包括驱动电机(100)和行星齿轮机构(400),该行星齿轮机构(400)使用齿轮使驱动电机(100)的旋转减速并传递给滚筒(22);电机驱动部(705),将驱动电流供给驱动电机(100);以及控制部(701),控制电机驱动部(705)。控制部(701)在使由行星齿轮机构(400)减速后的滚筒(22)的旋转停止时,控制电机驱动部(705)以使供给驱动电机(100)的驱动电流慢慢变小。该滚筒洗衣机采用由使用了齿轮的减速机构使驱动电机(100)的旋转减速并传递给滚筒(22)的结构,降低使滚筒(22)停止时从减速机构发出的异响。

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从洗涤到烘干连续地进行,也可以进行洗涤但不进行烘干。
背景技术
以往,滚筒式洗衣机在蓄水于底部的外槽内使横轴型的滚筒旋转,并通过设置在滚筒内的折流板(baffle)将洗涤物举起且使其落下,通过将洗涤物摔到滚筒的内周面来洗涤洗涤物(参照专利文献1)。
这样,在通过折流板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,滚筒式洗衣机与在洗涤脱水槽内使搅拌器(pulsator)旋转来洗涤洗涤物的全自动洗衣机相比,作用于洗涤物的机械力易变小,去污性能易降低。
因此,在滚筒式洗衣机中,为了提高去污性能,可以采用在滚筒的后面设置搅拌体,在洗涤、漂洗时使滚筒与搅拌体以不同的旋转速度旋转的结构。在这种情况下,可进一步采用由使用了齿轮的减速机构使驱动电机的旋转减速,并传递给滚筒的结构。
现有技术文献
专利文献
专利文献1:特开2013-240577号公报
发明内容
发明要解决的问题
然而,在滚筒式洗衣机中,如上述那样,在采用了由使用了齿轮的减速机构使驱动电机的旋转减速,并传递给滚筒的结构的情况下,在停止向驱动电机的通电时,容易从减速机构发出很大的异响。一般认为异响产生的主要原因是驱动电机欲停止但滚筒却由于惯性力而欲继续旋转,其结果对减速机构的齿轮 施加很大的冲击。
本发明鉴于该问题而完成,其目的在于,在采用由使用了齿轮的减速机构使驱动电机的旋转减速并传递给滚筒的结构的滚筒式洗衣机中,在使滚筒停止时降低从减速机构发出的异响。
用于解决课题的手段
本发明的主要方式所涉及的滚筒式洗衣机,具备:外槽,配置在壳体内;滚筒,配置在所述外槽内,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;驱动部,包括驱动电机和减速机构,该减速机构使用齿轮使该驱动电机的旋转减速并传递给所述滚筒;电机驱动部,对所述驱动电机供给驱动电流;控制部,控制所述电机驱动部。此处,所述控制部在使由所述减速机构减速后的所述滚筒的旋转停止时,控制所述电机驱动部以使供给所述驱动电机的驱动电流慢慢变小。
根据上述结构,在由减速机构减速后的滚筒的旋转停止时,驱动电机的旋转速度在慢慢降低后到达停止。由此,由于能在使驱动电机停止时降低施加给减速机构的齿轮的冲击,所以能降低减速机构的异响的产生。
在本方式所涉及的滚筒式洗衣机中,可采用所述电机驱动部根据由所述控制部设定的所述驱动电机的旋转速度而调整驱动电流的结构。在这种情况下,所述控制部在使由所述减速机构减速后的所述滚筒的旋转停止时,设定所述驱动电机的旋转速度以使按每一规定时间仅降低规定速度。
根据上述结构,能与负载量的大小无关地花费相同的时间使驱动电机的旋转速度降低,能不受负载量等的影响而良好地降低减速机构的异响的产生。
在本方式所涉及的滚筒式洗衣机中,可以采用进一步具备旋转体的结构,该旋转体配置于所述滚筒的后部,并在表面上具有与洗涤物接触的突状部。在这种情况下,采用所述驱动部还包括在二轴驱动形态和一轴驱动形态之间切换该驱动部的驱动形态的离合器机构部的结构,所述二轴驱动形态是通过由所述减速机构使所述驱动电机的旋转减速并传递给所述滚筒,而使所述滚筒和所述旋转体以不同的旋转速度分别进行旋转的形态,所述一轴驱动形态是通过不由所述减速机构使所述驱动电机的旋转减速并传递给所述滚筒,而使所述滚筒和所述旋转体以相同的旋转速度一体地进行旋转的形态。所述控制部在所述二轴 驱动形态中,在停止所述滚筒的旋转时,控制所述电机驱动部以使供给所述驱动电机的驱动电流慢慢变小,在所述一轴驱动形态中,在停止所述滚筒的旋转时,控制所述电机驱动部以使向所述驱动电机的驱动电流的供给立刻停止。
根据上述结构,例如在洗涤、漂洗时,通过驱动部的驱动形态被切换为二轴驱动形态,能对洗涤物不仅施加滚筒的旋转所产生的机械力,而且还施加旋转体所产生的机械力,能期待去污性能的提高。此外,例如,在脱水时,通过驱动形态被切换为一轴驱动形态,贴在滚筒上的洗涤物能不被旋转体搅拌,能良好地将洗涤物脱水。
并且,根据上述结构,在担心减速机构的异响的二轴驱动形态中,由于在使滚筒的旋转停止时,电机驱动部被控制为使供给驱动电机的驱动电流慢慢变小,所以能降低减速机构的异响的产生。另一方面,在不担心减速机构的异响的一轴驱动形态中,由于在使滚筒的旋转停止时,电机驱动部被控制为向驱动电机的驱动电流的供给立刻停止,所以能防止使不需要的滚筒的旋转停止所需的时间延长。
发明效果
根据本发明,滚筒式洗衣机在采用由使用了齿轮的减速机构使驱动电机的旋转减速并传递给滚筒的结构的情况下,能在使滚筒停止时降低从减速机构发出的异响。
本发明的效果以及意义由如下所示的实施方式的说明来进一步明确。但是,以下的实施方式终究只不过是将本发明实施化时的一个例示,本发明不受以下的实施方式中记载的内容的任何限制。
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面剖视图。
图2是表示实施方式所涉及的驱动单元的结构的剖视图。
图3是表示实施方式所涉及的驱动单元的结构的剖视图。
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主视图。
图5是实施方式所涉及的形成有齿条的轴承单元的后部的放大立体图。
图6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停止控制处理的流程图。
图9是示意性地表示在实施方式所涉及的进行了停止控制处理的情况下的设定速度的变化和驱动电机的实际旋转速度的变化的图。
图10是示意性地表示在实施方式所涉及的负载量大的情况和负载量小的情况中的、进行了停止控制处理时的驱动电机的实际旋转速度的变化的图。
具体实施方式
以下,关于作为本发明的滚筒式洗衣机的一个实施方式的不具有烘干功能的滚筒式洗衣机,参照附图进行说明。
图1是表示滚筒式洗衣机1的结构的侧面剖视图。
滚筒式洗衣机1具备构成外观的壳体10。壳体10的前表面10a从中央部向上部倾斜,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。
在壳体10内,外槽20由多个减振器21弹性地支承。滚筒22自由旋转地配置于外槽20内。外槽20以及滚筒22以后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。外槽20以及滚筒22的倾斜角度设定为10~20度左右。外槽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的内周面上,形成有许多个脱水孔22b。进而,在滚筒22的内周面上,在圆周方向上以大致相等的间隔设有三个折流板23。
搅拌体24自由旋转地配置于滚筒22的后部。搅拌体24大致具有圆盘形状。在搅拌体24的表面上,形成有从中央部放射状延伸的多个叶片24a。搅拌体24与滚筒22同轴旋转。搅拌体24相当于本发明的旋转体,叶片24a相当于本发明的突状部。
在外槽20的后方,配置有产生驱动滚筒22以及搅拌体24的转矩的驱动单元30。驱动单元30相当于本发明的驱动部。驱动单元30在洗涤工序以及漂洗工序时,使滚筒22以及搅拌体24在同一方向上以不同的旋转速度进行旋转。具体地说,驱动单元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旋转速度进行旋转,并使搅拌体24以比滚筒22的旋转速度还要快的旋转 速度进行旋转。另一方面,驱动单元30在脱水工序时使滚筒22以及搅拌体24以施加给滚筒22内的洗涤物的离心力远远大于重力的旋转速度一体地进行旋转。驱动单元30的详细结构随后进行说明。
在外槽20的底部形成有排水口部20b。在排水口部20b中设置有排水阀40。排水阀40与排水软管41连接。当排水阀40打开时,贮存于外槽20内的水就会通过排水软管41向机外排出。
在壳体10内的前方上部配置有洗涤剂盒50。收容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中。洗涤剂盒50通过给水软管52与配置在壳体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与外槽20的上部连接。当给水阀51打开时,通过给水软管52、洗涤剂盒50以及注水管53将来自水龙头的自来水供给外槽20内。此时,顺着水流将收容在洗涤剂容器50a中的洗涤剂供给外槽20内。
接着,关于驱动单元30的结构进行详细说明。
图2以及图3是表示驱动单元30的结构的剖视图。图2表示驱动单元30的驱动形态被切换到二轴驱动形态的状态,图3表示驱动单元30的驱动形态被切换到一轴驱动形态的状态。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是形成有齿条514的轴承单元500的后部的放大立体图。图6(a)~(c)是表示离合器机构部600的离合器体610的结构的图,其分别为离合器体610的主视图、右视图以及后视图。
驱动单元30包括:驱动电机100、翼轴200、滚筒轴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产生用于驱动搅拌体24以及滚筒22的转矩。翼轴200利用驱动电机100的转矩进行旋转,并将该旋转传递给搅拌体24。行星齿轮机构400将翼轴200的旋转、即将驱动电机100的转子110的旋转进行减速并传递给滚筒轴300。行星齿轮机构400相当于本发明的减速机构。滚筒轴300以由行星齿轮机构400减速后的旋转速度与翼轴200同轴旋转,并将该旋转传递给滚筒22。轴承单元500自由旋转地支承翼轴200以及滚筒轴300。离合器机构部600在二轴驱动形态和一轴驱动形态之间切换驱动单元30的驱动形态,其中,所述二轴驱动形态是能使搅拌体24即翼轴200以与驱动电机100的旋转速度相等的旋转速度进行旋转,并使滚筒22即滚筒轴300以由行星齿轮机构40减速后的旋转速度进行旋转的形态,所述一轴驱动形态是 能使搅拌体24以及滚筒22即翼轴200、滚筒轴300以及行星齿轮机构400以与驱动电机100相等的旋转速度一体地进行旋转的形态。
驱动电机100是外转子型DC无刷电机,包括转子110和定子120。转子110形成为有底的圆筒状,在其内周面上遍及整个圆周排列有永久磁铁111。如图4所示,在转子110的中央部形成有圆形的轴套部112。在轴套部112中形成有用于固定翼轴200的轴套孔113,并且在轴套孔113的外周上形成有环状的被卡合凹部114。被卡合凹部114的外周部遍及整个圆周具有凹凸部114a。
定子120在外周部具有线圈121。当从后述的电机驱动部给定子120的线圈121供给驱动电流时,转子110进行旋转。
滚筒轴300具有中空形状,并内包翼轴200和行星齿轮机构400。滚筒轴300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包括:太阳齿轮410、包围太阳齿轮410的环状的内齿轮420、介于太阳齿轮410和内齿轮420之间的多组行星齿轮430以及自由旋转地保持这些行星齿轮430的行星齿轮架440。
太阳齿轮410被固定于翼轴200,内齿轮420被固定于滚筒轴300。一组行星齿轮430包括相互咬合且反向进行旋转的第一齿轮和第二齿轮。行星齿轮架440包括向后方延伸的齿轮架轴441。齿轮架轴441与滚筒轴300为同轴,并且内部形成为中空以供翼轴200插入。
翼轴200的后端部从齿轮架轴441向后方突出,并被固定于转子110的轴套孔113。
在轴承单元500中,在中央部设置有圆筒状的轴承部510。在轴承部510的内部,在前部以及后部设有滚轴511、512,在前端部设有机械密封件513。滚筒轴300的外周面由滚轴511、512支承,并在轴承部510内顺滑地旋转。另外,通过机械密封件513防止水向轴承部510和滚筒轴300之间的侵入。如图5所示,在轴承部510的后端部,在内面上遍及整个圆周形成有齿条514。
在轴承单元500中,在轴承部510的周围形成有固定凸缘部520。在固定凸缘部520的下端部形成有安装轴套521。
在固定凸缘部520中,通过紧固螺钉等的固定方法,将轴承单元500固定在外槽20的后面。在驱动单元30已安装于外槽20内的状态下,翼轴200以及滚筒轴300面临外槽20的内部。滚筒22被固定于滚筒轴300,搅拌体24被固 定于翼轴200。
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、接合棒660、安装板670。
如图6(a)~(c)所示,离合器体610大致具有圆盘形状。在离合器体610的前端部,在外周面上形成有环状的齿条611。齿条611以与轴承单元500的齿条514卡合的方式形成。另外,在离合器体610的外周面上,在齿条611的后方形成有凸缘部612。进而,在离合器体610中,在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114相同的形状,在外周部遍及整个圆周具有凹凸部613a。当卡合凸缘部613插入到被卡合凹部114时,凹凸部613a、114a就彼此卡合。
齿轮架轴441插入到离合器体610的轴孔614。形成于轴孔614的内周面上的齿条614a和形成于齿轮架轴441的外周面上的齿条441a进行卡合。由此,离合器体610成为相对于齿轮架轴441,前后方向上的移动被允许,并且圆周方向上的转动被限制的状态。
在离合器体610中,在轴孔614的外侧形成有环状的收容槽615,在该收容槽615中收容有离合器弹簧620。离合器弹簧620的一端与轴承部510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的后面接触,并将凸缘部612向前方推的按压部631。离合器杆630由设置于杆支承部640上的支轴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的转矩绕着水平轴旋转的圆盘状的凸轮652。在凸轮652的上面,在外周部设有凸轮轴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。
接合棒660向上下方向延伸,并将离合器杆630和凸轮652进行连结。接合棒660的上端部安装于离合器杆630的安装轴632上,下端部安装于凸轮652的凸轮轴653上。在接合棒660的中间位置上一体地形成有弹簧661。弹簧661是拉伸弹簧。
杆支承部640以及离合器驱动装置650通过紧固螺钉等的固定方法固定于安装板670。安装板670通过螺钉固定于轴承单元500的安装轴套521。
在驱动单元30的驱动形态从一轴驱动形态切换到二轴驱动形态的情况下,如图2所示,凸轮652利用转矩电机651进行旋转以使凸轮轴653位于最下方。随着凸轮652进行旋转,离合器杆630的下端部被接合棒660拉到下方。离合器杆630以支轴641为中心向前方旋转,按压部631将离合器体610向前方推。离合器体610逆着离合器弹簧620的弹力向前方移动,离合器体610的齿条611和轴承单元500的齿条514进行卡合。
当离合器体610的凸轮轴653移动到中间的规定位置时,齿条611到达与齿条514卡合的位置。此时,接合棒660的弹簧661处于自然长度的状态。由于离合器体610不会移动到比该卡合位置更靠前的位置,所以当凸轮轴653从规定位置移动到最下方的位置时,如图2所示,弹簧661伸长到下方。这样,由于离合器杆630以向前方转动的方式被弹簧661拉动,所以从按压部631给位于卡合位置的离合器体610施加按压力。由此,能使齿条611紧紧地卡合于齿条514。
当齿条611和齿条514卡合时,由于离合器体610相对于轴承单元500在圆周方向上的转动受限,成为不可转动的状态,所以行星齿轮机构400的齿轮架轴441,即行星齿轮架440成为以不能旋转的方式被固定的状态。在这样的状态下,当转子110旋转时,翼轴200以与转子110的旋转速度相等的旋转速度进行旋转,并且与翼轴200连结的搅拌体24也以与转子110的旋转速度相等的旋转速度进行旋转。随着翼轴200的旋转,在行星齿轮机构400中太阳齿轮410进行旋转。如上所述,由于行星齿轮架440处于被固定的状态,所以行星齿轮430的第一齿轮以及第二齿轮分别与太阳齿轮410同向以及逆向进行旋转,内齿轮420与太阳齿轮410同向进行旋转。由此,固定于内齿轮420的滚筒轴300与翼轴200同向,并且以比翼轴200还要慢的旋转速度进行旋转,固定于滚筒轴300的滚筒22以比搅拌体24还要慢的旋转速度与搅拌体24同向进行旋转。换言之,搅拌体24以比滚筒22还要快的旋转速度与滚筒22同向进行旋转。
另一方面,在驱动单元30的形态从二轴驱动形态切换到一轴驱动形态的情况下,如图3所示,凸轮652利用转矩电机651进行旋转以使凸轮轴653位于最上方。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进行移动,接合棒660会向上方移动,离合器杆630的下端部被接合棒660推动,向上方移动。离 合器杆630以支轴641为中心向后方进行旋转,按压部631从离合器体610的凸缘部612分离。离合器体610利用离合器弹簧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114进行卡合。
当卡合凸缘部613和被卡合凹部114卡合时,相对于转子110的向离合器体610的圆周方向的转动受限,离合器体610与转子110一同成为能旋转的状态。在这样的状态下,当转子110旋转时,翼轴200以及离合器体610以与转子110的旋转速度相等的旋转速度进行旋转。此时,在行星齿轮机构400中,太阳齿轮410和行星齿轮架440以与转子110相等的旋转速度进行旋转。由此,内齿轮420以与太阳齿轮410以及行星齿轮架440相等的旋转速度进行旋转,固定于内齿轮420的滚筒轴300以与转子110相等的旋转速度进行旋转。即,在驱动单元30中,翼轴200、行星齿轮机构400以及滚筒轴300成为一体进行旋转。由此,滚筒22和搅拌体24一体地进行旋转。
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、程序选择按钮703c。电源按钮703a是用于接通以及关断滚筒式洗衣机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是用于从涉及洗涤运转的多个运转程序中选择任意的运转程序的按钮。操作部703将与用户所操作的按钮相应的输入信号输出到控制部701。
水位传感器704检测外槽20内的水位,将与检测到的水位相应的水位检测信号输出到控制部701。
电机驱动部705根据来自控制部701的控制信号,将驱动电流供给驱动电机100。电机驱动部705具有检测驱动电机100的旋转速度的速度传感器、逆变电路等,并调整驱动电流以使驱动电机100以由控制部701设定的旋转速度进行旋转。例如,作为电机驱动控制,使用PWM控制。在这种情况下,控制部701通过将基于检测到的旋转速度而确定的占空比的脉冲电压施加给驱动电机100,从而将与该脉冲电压对应的驱动电流供给驱动电机100。
给水驱动部706根据来自控制部701的控制信号,将驱动电流供给给水阀 51。排水驱动部707根据来自控制部701的控制信号,将驱动电流供给排水阀40。
离合器驱动装置650包括第一检测传感器654以及第二检测传感器655。第一检测传感器654检测驱动单元30的驱动形态被切换到二轴驱动形态的情况,并将检测信号输出到控制部701。第二检测传感器655检测到驱动单元30的驱动形态被切换到一轴驱动形态的情况,并将检测信号输出到控制部701。离合器驱动部708基于来自第一检测传感器654以及第二检测传感器655的检测信号,并根据从控制部701输出的控制信号,将驱动电流供给转矩电机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。在存储部702中存储有用于执行各种洗涤运转程序的洗涤运转的程序。另外,在存储部702中存储有用于这些程序的执行的各种参数、各种控制标记。
控制部701基于来自操作部703、水位传感器704等的各个信号,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以及门锁装置709等。
滚筒式洗衣机1根据基于程序选择按钮703c的用户的选择操作,进行各种运转程序的洗涤运转。在洗涤运转中,按顺序执行洗涤工序、中间脱水工序、漂洗工序以及最终脱水工序。此外,根据运转程序,会有进行两次以上中间脱水工序和漂洗工序的情况。
在洗涤工序以及漂洗工序中,驱动单元30的驱动形态被切换到二轴驱动形态。水在外槽20内储存至不到投入口11的下缘的规定的水位以使滚筒22内的洗涤物浸入水中,在该状态下,驱动电机100交互进行正转以及反转。由此,滚筒22和搅拌体24以搅拌体24的旋转速度比滚筒22的旋转速度快的状态交互地进行正转以及反转。此时,滚筒22以作用于洗涤物的离心力变得比重力小的旋转速度进行旋转。
滚筒22内的洗涤物通过折流板23被举起且落下,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搅拌体24的叶片24a,洗涤物被叶片24a摩擦、通过叶片24a洗涤物被搅拌。由此,洗涤物被洗涤或者漂洗。
这样,在洗涤以及漂洗时,由于洗涤物不仅被施加滚筒22的旋转所产生的机械力,还被施加搅拌体24所产生的机械力,所以能期待去污性能的提高。在 中间脱水工序以及最终脱水工序中,驱动单元30的驱动形态被切换到一轴驱动形态。驱动电机100、即滚筒22以及搅拌体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旋转速度一体地进行旋转。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,在脱水时,由于滚筒22和搅拌体24一体地进行旋转,所以贴在滚筒22上的洗涤物不用由搅拌体24来搅拌,就能良好地给洗涤物脱水。
那么,如上所述,在本实施方式的滚筒式洗衣机1中,采用了使用行星齿轮机构400使驱动电机100的旋转减速并传递给滚筒22的结构。在作为这样的结构的情况下,在二轴驱动形态中,由于在使驱动电机100停止时,当立即停止对驱动电机100的通电时,驱动电机100欲停止但滚筒22却因惯性力而欲继续旋转,其结果会给行星齿轮机构400的各个齿轮施加很大的冲击,所以容易从行星齿轮机构400发出很大的异响。
因此,在本实施方式中,在二轴驱动形态中停止驱动电机100的情况下,由控制部701来执行用于降低从行星齿轮机构400发出的异响的停止控制处理。以下,关于停止控制处理,详细地进行说明。
图8是表示停止控制处理的流程图。
在使驱动电机100启动后,当到了使驱动电机100停止的时间时,就开始停止控制处理。
控制部701将设定为目标旋转速度的旋转速度即设定速度,从驱动电机100的工作时的旋转速度,例如,在洗涤工序时设定为适合洗涤物的洗涤的旋转速度,仅降低预定的降速V0(S101)。例如,降速V0可设为工作时的旋转速度的几分之一到十几分之一左右的旋转速度。
控制部701控制电机驱动部705,调整供给驱动电机100的驱动电流以使驱动电机100的旋转速度为新的设定速度(S102)。
控制部701判断是否从更新设定速度起已经过了维持时间T0(S103)。维持时间T0是为了维持新的设定速度而预先设定的时间,例如,设为从几百毫秒到几毫秒左右的时间。当经过了维持时间T0时(103:是),控制部701根据接下来的速度下降来判断设定速度是否为零(S104)。然后,当设定速度不为零(S104:否)时,控制部701返回步骤S101,再次使设定速度仅降低降速V0。
这样,在步骤S104中,重复步骤S101~S103的处理,直到根据接下来的 速度下降,设定速度为零的判断成立为止。之后,当控制部701根据接下来的速度下降判断设定速度为零时(S104:是),停止向驱动电机100的驱动电流的供给(S105)。这样,停止控制处理就结束。
图9(a)以及(b)是示意性地表示在进行了图8的停止控制处理的情况下的设定速度的变化和驱动电机100的实际旋转速度的变化的图。
如图9(a)所示,在洗涤工序时、漂洗工序时,驱动电机100以适于洗涤的洗涤速度、适于漂洗的漂洗速度反复正转以及反转。此时,通过进行图8的停止控制处理,在驱动电机100停止时,设定速度按每一维持时间T0逐次缩小降速V0。由此,在使驱动电机100停止时,供给驱动电机100的驱动电流不会立即变为零,而是慢慢变小,如图9(b)所示,驱动电机100一边降低旋转速度一边在不久后到达停止。当最终停止对驱动电机100的通电,即驱动电流为零时,驱动电机100的旋转速度下降到非常低的旋转速度,滚筒22的旋转速度也随之下降到了非常低的旋转速度。因此,在该状态下即使驱动电机100由于通电停止而停止,由于作用于滚筒22的惯性力小,所以不会对行星齿轮机构400施加很大的冲击,能抑制异响的产生。
此外,在驱动单元30的驱动形态为一轴驱动形态的情况下,由于驱动电机100的旋转不被行星齿轮机构400减速地传递给滚筒轴300,所以在停止驱动电机100时不易产生行星齿轮机构400的异响。因此,控制部701在脱水工序时等驱动形态被切换为一轴驱动形态的情况下,在停止滚筒22即驱动电机100的旋转时,不执行图8的停止控制处理,而控制电机驱动部705以使向驱动电机100的驱动电流的供给立刻停止。由此,在一轴驱动形态下,能防止使不需要的滚筒22的旋转停止所需的时间延长。
<实施方式的效果>
以上,如已说明的那样,根据本实施方式,在二轴驱动形态下使驱动电机100工作的情况下,在使驱动电机100停止时,由于控制驱动电机100以使旋转速度在慢慢降低后到达停止,所以在使驱动电机100停止时能降低施加给行星齿轮机构400的冲击,能降低行星齿轮机构400的异响的产生。
另外,在使滚筒22急剧停止的情况下,虽然滚筒22容易产生振动,但根据上述实施方式,由于能使滚筒22缓慢地停止,所以能抑制振动的产生。
进而,根据上述实施方式,为了使驱动电机100慢慢减速,进行了将设定 速度按每一固定时间仅缩小固定速度的电机控制。虽然滚筒22内的负载量越小则滚筒22即驱动电机100越容易快速地减速,但通过进行上述的电机控制,如图10(a)以及(b),能与负载量的大小无关地花费相同的时间使驱动电机100的旋转速度降低。由此,能不受负载量等的影响而良好地降低行星齿轮机构400的异响的产生。
<变更例>
以上,虽然关于本发明的实施方式进行了说明,但是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。
例如,在上述实施方式中,驱动电机100的转子110通过翼轴200直接与搅拌体24结合,搅拌体24以与驱动电机100的旋转速度相等的旋转速度进行旋转。但是,在搅拌体24和驱动电机100之间,与滚筒22相同,也可以介入使用了齿轮的减速机构。在这种情况下,通过使在搅拌体24中使用的减速机构的减速比小于行星齿轮机构400的减速比,能使搅拌体24比滚筒22快速地旋转。
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不具备烘干功能,但本发明也能用于具备烘干功能的滚筒式洗衣机、即滚筒式烘干洗衣机。
此外,本发明的实施方式在权利要求书示出的技术思想的范围内可以适当地进行各种变更。
附图标记说明
10  壳体;
20  外槽;
22  滚筒;
24  搅拌体(旋转体)
24a 叶片(突状部);
30  驱动单元(驱动部);
100 驱动电机
400 行星齿轮机构(减速机构);
600 离合器机构部;
701 控制部;
705 电机驱动部。

Claims (3)

  1. 一种滚筒式洗衣机,其特征在于,具备:
    外槽,配置在壳体内;
    滚筒,配置在所述外槽内,并且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;
    驱动部,包括驱动电机和减速机构,所述减速机构使用齿轮使该驱动电机的旋转减速并传递给所述滚筒;
    电机驱动部,对所述驱动电机供给驱动电流;以及
    控制部,控制所述电机驱动部,
    所述控制部在使由所述减速机构减速后的所述滚筒的旋转停止时,控制所述电机驱动部以使供给所述驱动电机的驱动电流慢慢变小。
  2. 根据权利要求1所述的滚筒式洗衣机,其特征在于,
    所述电机驱动部根据由所述控制部设定的所述驱动电机的旋转速度来调整驱动电流,
    所述控制部在使由所述减速机构减速后的所述滚筒的旋转停止时,以按每一规定的时间仅降低规定速度的方式设定所述驱动电机的旋转速度。
  3. 根据权利要求1或2所述的滚筒式洗衣机,其特征在于,
    还具备:旋转体,配置于所述滚筒的后部,并且在表面具有与洗涤物接触的突状部,
    所述驱动部还包括:在二轴驱动形态和一轴驱动形态之间切换该驱动部的驱动形态的离合器机构部,所述二轴驱动形态是通过由所述减速机构使所述驱动电机的旋转减速并传递给所述滚筒,而使所述滚筒和所述旋转体以不同的旋转速度分别进行旋转的形态,所述一轴驱动形态是通过不由所述减速机构使所述驱动电机的旋转减速并传递给所述滚筒,而使所述滚筒和所述旋转体以相同的旋转速度一体地进行旋转的形态,
    所述控制部
    在所述二轴驱动形态中,在停止所述滚筒的旋转时,控制所述电机驱动部以使供给所述驱动电机的驱动电流慢慢变小,
    在所述一轴驱动形态中,在停止所述滚筒的旋转时,控制所述电机驱动部以使向所述驱动电机的驱动电流的供给立刻停止。
PCT/CN2014/095723 2014-06-26 2014-12-30 滚筒式洗衣机 Ceased WO2015196775A1 (zh)

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CN1195726A (zh) * 1997-03-20 1998-10-14 三星电子株式会社 制动洗衣机脱水桶的方法
JP4238497B2 (ja) * 2001-09-17 2009-03-18 パナソニック株式会社 洗濯機のモータ駆動装置
CN103415658A (zh) * 2011-02-28 2013-11-27 株式会社东芝 洗衣机
CN103789964A (zh) * 2012-10-31 2014-05-14 三星电子株式会社 洗衣机及其控制方法

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JP3383957B2 (ja) * 1993-08-13 2003-03-10 株式会社東芝 洗濯機及びその制御方法
JP3029193B2 (ja) * 1997-01-23 2000-04-04 株式会社日立製作所 全自動洗濯・乾燥機
KR100763367B1 (ko) * 2000-11-15 2007-10-04 엘지전자 주식회사 드럼세탁기
JP2004008278A (ja) * 2002-06-04 2004-01-15 Hitachi Home & Life Solutions Inc 洗濯機
JP3895284B2 (ja) * 2003-02-24 2007-03-22 株式会社東芝 洗濯機
JP5176662B2 (ja) * 2008-04-09 2013-04-03 パナソニック株式会社 ドラム式洗濯機
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CN1195726A (zh) * 1997-03-20 1998-10-14 三星电子株式会社 制动洗衣机脱水桶的方法
JP4238497B2 (ja) * 2001-09-17 2009-03-18 パナソニック株式会社 洗濯機のモータ駆動装置
CN103415658A (zh) * 2011-02-28 2013-11-27 株式会社东芝 洗衣机
CN103789964A (zh) * 2012-10-31 2014-05-14 三星电子株式会社 洗衣机及其控制方法

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