JP2018033512A - Drum type washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drum type washing machine which can be expected to prevent lock of a drive motor due to cloth entanglement and the like.SOLUTION: A drum type washing machine 1 includes: a drum 22 arranged in an outer tub 20, and rotatable around an inclined shaft; a rotary vane 24 arranged in the drum 22; a drive part 30 including a drive motor 100, and capable of an operation by a double-axis driving mode in which torque of the drive motor 100 is transmitted to the drum 22 and the rotary vane 24 and for rotating the drum 22 and the rotary vane 24 at rotational frequencies different from each other, and a rotary vane single-body driving mode in which the torque of the drive motor 100 is not transmitted to the drum 22 but is transmitted to the rotary vane 24, and for rotating the rotary vane 24; and a control part. In a washing step and a rinsing step, the control part rotates the drum 22 and the rotary vane 24 normally or reversely by the double-axis driving mode, and based on the fact that a driving current of the drive motor 100 has exceeded a threshold value, rotates the rotary vane 24 normally or reversely by the rotary vane single-body driving mode.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a drum type washing machine. Such a drum-type washing machine may be one that performs continuously from washing to drying, or one that performs washing but does not dry.

  Conventionally, a drum-type washing machine rotates a horizontal axis drum in an outer tub with water stored in the bottom, lifts and drops the laundry by a baffle provided in the drum, and the laundry is moved to the inner periphery of the drum. Wash the laundry by tapping on the surface. As described above, in the configuration in which the laundry is stirred by the baffle, the laundry is unlikely to be entangled or rubbed with each other. Therefore, in the drum type washing machine, in order to improve the cleaning performance, a rotating body having a plurality of protrusions is provided on the rear surface of the drum, and the drum and the rotating body are separately rotated at different rotational speeds when washing is easy. A configuration may be adopted (see Patent Document 1).

Japanese Patent Laying-Open No. 2006-036398

  In the drum type washing machine, when the washing is too easy, the rotating body rotates at a rotational speed different from the rotational speed of the drum, so that the laundry is easily twisted in the drum and the laundry is likely to be entangled.

  When the inventors observed the movement of the laundry in the drum, when such a fabric entanglement occurs, the tangled laundry is wound around the center of the rotator by the rotation of the rotator in the drum. The laundry moves so as to be pushed out on the axis of the rotating body. When such laundry moves, depending on the amount of laundry put into the drum, the laundry entangled with the central portion of the drum is densely packed, and the space between the door covering the front of the drum and the rotating body A large amount of laundry can be packed and compressed. If it becomes like this, it will become easy to apply the big load by a laundry to a rotary body, and will be easily connected with the lock | rock of the drive motor which drives a rotary body.

  The present invention has been made in view of such problems, and an object of the present invention is to provide a drum-type washing machine that can be expected to prevent a drive motor from being locked due to fabric entanglement or the like.

  A drum-type washing machine according to a main aspect of the present invention includes an outer tub disposed in a housing, a drum disposed in the outer tub and rotatable about a horizontal axis or an inclined axis inclined with respect to a horizontal direction. A rotating body that is disposed in the drum and has a protrusion on the surface that contacts the laundry, and a driving motor, and transmits the torque of the driving motor to the drum and the rotating body to rotate the drum and the rotating body. An operation according to the first drive mode for rotating the body at different rotational speeds, and an operation according to the second drive mode for transmitting the torque of the drive motor to the rotating body without rotating it to the drum and rotating the rotating body. And a control unit that controls the operation of the drive unit. Here, in the washing step and / or the rinsing step, the control unit rotates or reverses the drum and the rotating body according to the first drive mode, and receives the predetermined trigger input, The rotating body is rotated forward or reverse by two drive modes.

  According to the above configuration, even if the load applied to the rotating body is increased due to the cloth entangled in the laundry in the drum, the laundry is rotated in the normal direction or reversed by the second drive mode. The load applied to the drive motor is reduced. This can be expected to prevent the drive motor from being locked.

  In the drum type washing machine according to this aspect, an input indicating that a load applied to the drive motor exceeds a predetermined magnitude may be the trigger input.

  According to said structure, the loosening of the laundry by a 2nd drive form is performed only when necessity becomes high because the load concerning a drive motor becomes large. Thereby, the washing process and the rinsing process are unnecessarily difficult to extend.

  In the drum type washing machine according to this aspect, an input indicating that a predetermined time has elapsed since the rotation of the drum and the rotating body according to the first drive mode is started may be the trigger input.

  According to the above configuration, since the laundry is loosened by the second drive mode at an appropriate timing during the washing process and the rinsing process, it is not necessary to provide a detection unit for detecting the load applied to the drive motor.

  In the drum type washing machine according to this aspect, the driving unit transmits the torque of the driving motor to the drum and the rotating body to rotate the drum and the rotating body integrally at the same number of rotations. It can be set as the structure in which the operation | movement by 3 drive forms is possible.

  In such a configuration, the control unit rotates the rotating body in the second driving mode and then rotates the drum and the rotating body in the first driving mode again before rotating the rotating body. The drum may be configured to rotate at a rotational speed at which the centrifugal force acting on the laundry in the drum is greater than the gravity, according to the three-drive mode.

  According to said structure, the loosened laundry can be pushed outside by centrifugal force, and can be disperse | distributed to the internal peripheral surface side of a drum. Thereby, the load applied to the drive motor through the rotating body is further reduced, and the lock of the drive motor is further suppressed.

  In the drum type washing machine according to this aspect, the driving unit is fixed to the first rotating shaft fixed to the rotating body, the second rotating shaft fixed to the drum, and the first rotating shaft, A first pulley coupled to the drive motor via a belt, a second pulley coupled to the drive motor via a second belt and having a different outer diameter from the first pulley, and driving by the drive unit The configuration is switched to the first drive configuration by connecting the second rotation shaft and the second pulley so that the rotation of the second pulley can be transmitted to the second rotation shaft, and the second rotation The second rotary shaft is configured such that the shaft is not connected to either the first pulley or the second pulley to switch to the second drive mode, and the rotation of the first pulley can be transmitted to the second rotary shaft. And the first pulley It may be configured as including a clutch mechanism for switching to the third drive mode by.

  According to the above configuration, the drive unit adopting the three drive modes of the first drive mode, the second drive mode, and the third drive mode is realized with a simple configuration using the speed reduction mechanism including the belt and the pulley. Compared with the case of using a gear reduction mechanism, the reliability of the drive unit can be increased in terms of failure and the like.

  According to the present invention, it can be expected to prevent the drive motor from being locked due to fabric entanglement or the like.

  The effects and significance of the present invention will become more apparent from the following description of embodiments. However, the following embodiment is merely an example when the present invention is implemented, and the present invention is not limited to what is described in the following embodiment.

FIG. 1 is a side sectional view showing a configuration of a drum type washing machine according to an embodiment. FIG. 2 is a cross-sectional view of the drive unit showing the state switched to the biaxial drive mode according to the embodiment. FIG. 3 is a cross-sectional view of the drive unit showing the state switched to the uniaxial drive mode according to the embodiment. FIG. 4 is a cross-sectional view of the drive unit showing a state switched to the rotor blade single drive mode according to the embodiment. FIGS. 5A and 5B are diagrams showing the configurations of the blade pulley and the drum pulley according to the embodiment. FIGS. 6A to 6C are diagrams showing configurations of the clutch guide and the clutch body according to the embodiment. FIGS. 7A to 7C are views showing the configuration of the clutch portion constituting the clutch body according to the embodiment. FIG. 8 is a block diagram showing a configuration of the drum type washing machine according to the embodiment. FIG. 9 is a flowchart showing a control operation by the control unit in the washing process and the rinsing process according to the embodiment. FIG. 10A schematically shows a state in which the intertwined laundry is concentrated in the center of the drum and the rotor is pressed by the laundry packed between the door and the rotor according to the embodiment. FIG.10 (b) is a figure which shows typically a mode that the laundry which was crowded in the center part of the drum by the loosening operation | movement is loosened, and laundry is separated from each other according to the embodiment. . FIG. 11 is a flowchart illustrating a control operation by the control unit in the washing process and the rinsing process according to the first modification. FIG. 12 is a flowchart illustrating a control operation by the control unit in the washing process and the rinsing process according to the second modification. FIG. 13 is a diagram schematically illustrating a state in which the laundry after being loosened by the loosening operation is dispersed on the inner peripheral surface side of the drum by the dispersing operation according to the second modification.

  Hereinafter, a drum type washing machine having no drying function according to an embodiment of the drum type washing machine of the present invention will be described with reference to the drawings.

  FIG. 1 is a side sectional view showing a configuration of a drum type washing machine 1 according to the present embodiment.

  The drum-type washing machine 1 includes a housing 10 that forms an appearance. The front surface 10a of the housing 10 is inclined from the central portion to the upper portion, and the laundry inlet 11 is formed on the inclined surface. The insertion port 11 is covered with a door 12 that can be freely opened and closed.

  The outer tub 20 is elastically supported by a plurality of dampers 21 in the housing 10. A drum 22 is rotatably disposed in the outer tub 20. The outer tub 20 and the drum 22 are inclined with respect to the horizontal direction so that the rear surface side becomes lower. As a result, the drum 22 rotates around the tilt axis tilted with respect to the horizontal direction. The inclination angle of the outer tub 20 and the drum 22 can be about 10 to 20 degrees. The opening 20a on the front surface of the outer tub 20 and the opening 22a on the front surface of the drum 22 are opposed to the charging port 11, and both the charging port 11 is closed by the door 12. A number of dewatering holes 22 b are formed in the peripheral wall of the drum 22. Further, three baffles 23 are provided on the inner peripheral surface of the drum 22 at substantially equal intervals in the circumferential direction.

  A rotary blade 24 is rotatably disposed at the rear portion of the drum 22. The rotor blade 24 has a substantially disk shape. On the surface of the rotor blade 24, a plurality of protrusions 24a extending radially from the center are formed. The rotary blade 24 rotates coaxially with the drum 22. The rotor blade 24 corresponds to the rotor of the present invention.

  A drive unit 30 that generates torque for driving the drum 22 and the rotary blades 24 is disposed behind the outer tub 20. The drive unit 30 rotates the drum 22 and the rotary blade 24 at different rotational speeds in the same direction during the washing process and the rinsing process.

  Specifically, the drive unit 30 rotates the drum 22 at a rotation speed at which the centrifugal force applied to the laundry in the drum 22 is less than gravity, and the rotation blade 24 is faster than the rotation speed of the drum 22. Rotate with

  On the other hand, the driving unit 30 integrally rotates the drum 22 and the rotary blade 24 at a rotation speed at which the centrifugal force applied to the laundry in the drum 22 is much greater than the gravity. The detailed configuration of the drive unit 30 will be described later.

  A drain port 20 b is formed at the bottom of the outer tub 20. A drain valve 40 is provided at the drain port 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 tub 20 is discharged to the outside through the drain hose 41.

  A detergent box 50 is disposed in the upper front portion of the housing 10. In the detergent box 50, a detergent container 50a in which detergent is accommodated is accommodated so that it can be pulled out from the front. The detergent box 50 is connected by a water supply hose 52 to a water supply valve 51 disposed at the upper rear part in the housing 10. The detergent box 50 is connected to the upper part of the outer tub 20 by a water injection pipe 53. When the water supply valve 51 is opened, tap water is supplied from the water tap into the outer tub 20 through the water supply hose 52, the detergent box 50 and the water injection pipe 53. At this time, the detergent accommodated in the detergent container 50 a flows into the water and is supplied into the outer tub 20.

  Next, the configuration of the drive unit 30 will be described in detail.

  2 to 4 are cross-sectional views showing the configuration of the drive unit 30 according to the present embodiment. FIG. 2 shows a state where the drive mode of the drive unit 30 is switched to the biaxial drive mode. FIG. 3 shows a state where the drive mode of the drive unit 30 is switched to the uniaxial drive mode. FIG. 4 shows a state where the drive mode of the drive unit 30 is switched to the rotary blade single drive mode. FIG. 5 is a diagram showing the configuration of the blade pulley 510 and the drum pulley 610 according to the present embodiment. FIG. 5A is a view of the blade pulley 510 as viewed from the front, and FIG. 5B is a view of the drum pulley 610 as viewed from the rear. FIG. 6 is a diagram illustrating the configuration of the clutch guide 710 and the clutch body 720 according to the present embodiment. 6A is a side sectional view of the clutch guide 710 and the clutch body 720, FIG. 6B is a view of the clutch guide 710 viewed from the front, and FIG. 6C is a view of the clutch guide 710 viewed from the rear. It is a figure. FIG. 7 is a diagram showing a configuration of the clutch portion 721 that constitutes the clutch body 720 according to the present embodiment. 7A is a view of the clutch portion 721 as viewed from the front, FIG. 7B is a side view of the clutch portion 721, and FIG. 7C is a view of the clutch portion 721 as viewed from the rear.

  The drive unit 30 includes a drive motor 100, a drum shaft 200, a blade shaft 300, a bearing unit 400, a blade speed reduction mechanism 500, a drum speed reduction mechanism 600, and a clutch mechanism portion 700.

  The drive motor 100 generates torque for driving the drum 22 and the rotary blade 24. The drive motor 100 is, for example, an inner rotor type DC brushless motor, and a motor shaft 120 connected to the rotor in the housing 110 extends rearward from the housing 110.

  The drum shaft 200 has a hollow shape. Inside the drum shaft 200, a first slide bearing 211 and a second slide bearing 212 are provided at the front and rear, respectively, and a mechanical seal 213 is provided at the front end. The drum shaft 200 corresponds to the second rotation shaft of the present invention.

  The blade shaft 300 is included in the drum shaft 200. The front portion of the blade shaft 300 protrudes forward from the drum shaft 200, and the rear portion of the blade shaft 300 protrudes rearward from the drum shaft 200. The blade shaft 300 has an outer peripheral surface received by the first slide bearing 211 and the second slide bearing 212 and rotates smoothly in the drum shaft 200. Further, the mechanical seal 213 prevents water from entering between the blade shaft 300 and the drum shaft 200. The blade axis 300 corresponds to the first rotating shaft of the present invention.

  The bearing unit 400 is provided with a substantially cylindrical bearing 410 at the center. Inside the bearing portion 410, a first rolling bearing 411 and a second rolling bearing 412 are provided at the front portion and the rear portion, respectively, and a mechanical seal 413 is provided at the front end portion. The outer peripheral surface of the drum shaft 200 is received by the first rolling bearing 411 and the second rolling bearing 412 and smoothly rotates in the bearing portion 410. Further, the mechanical seal 413 prevents water from entering between the drum shaft 200 and the bearing portion 410. Further, the bearing unit 400 is formed with a fixed flange portion 420 around the bearing portion 410.

  The bearing unit 400 is fixed to the rear surface of the outer tub 20 by a fixing method such as screwing at the fixing flange portion 420. In a state where the bearing unit 400 is mounted on the outer tub 20, the blade shaft 300 and the drum shaft 200 face the inside of the outer tub 20. The drum 22 is fixed to the drum shaft 200 by screws (not shown), and the rotary blade 24 is fixed to the blade shaft 300 by screws 310.

  Blade reduction mechanism 500 includes a blade pulley 510, a first motor pulley 520, and a blade belt 530. The rotation of the drive motor 100 is decelerated according to a reduction ratio determined by the outer diameter ratio between the blade pulley 510 and the first motor pulley 520 and transmitted to the blade shaft 300 and the drum shaft 200.

  The blade pulley 510 is rotatably supported by the rear end portion of the blade shaft 300. The blade pulley 510 is formed with an insertion hole 511 into which the blade shaft 300 is inserted at the center. The rear end portion of the blade shaft 300 is inserted into the insertion hole 511, and the rear end portion of the blade shaft 300 is fixed to the insertion hole 511 by a predetermined fixing method such as press-fitting using a spline. Further, the fixing screw 320 attached to the rear end portion of the blade shaft 300 prevents the blade pulley 510 from coming out backward.

  As shown in FIG. 5A, an annular engaged recess 512 is formed on the front surface of the blade pulley 510. A spline 513 is formed on the outer peripheral surface of the engaged recess 512 over the entire periphery.

  The first motor pulley 520 is attached to the tip of the motor shaft 120 of the drive motor 100. The blade belt 530 is bridged between the blade pulley 510 and the first motor pulley 520.

  The drum speed reducing mechanism 600 includes a drum pulley 610, a second motor pulley 620, and a drum belt 630. The rotation of the drive motor 100 is decelerated according to a reduction ratio determined by the outer diameter ratio between the drum pulley 610 and the second motor pulley 620 and transmitted to the drum shaft 200.

  The drum pulley 610 is formed in a dish shape with an open front surface, and includes a pulley portion 611 and a fixing portion 612 having a smaller outer diameter than the pulley portion 611. Since the outer diameter of the pulley section 611, that is, the outer diameter of the drum pulley 610 is larger than the outer diameter of the blade pulley 510, the reduction ratio by the drum reduction mechanism 600 is larger than the reduction ratio by the blade reduction mechanism 500. For example, the reduction ratio by the drum reduction mechanism 600 can be about twice the reduction ratio by the blade reduction mechanism 500.

  The fixing portion 612 is formed with an insertion hole 613 at the center. Two rolling bearings 614 and 615 are interposed between the insertion hole 613 and the drum shaft 200. The drum pulley 610 smoothly rotates with respect to the drum shaft 200 by the two rolling bearings 614 and 615.

  As shown in FIG. 5B, an annular engaged recess 616 is formed on the outer surface of the insertion hole 613 on the rear surface of the fixing portion 612. A spline 617 is formed on the outer peripheral surface of the engaged recess 616 over the entire periphery.

  A rear end portion of the bearing portion 410 is accommodated in a pulley portion 611 that is a recessed portion 618 recessed backward. Thereby, the bearing unit 400 and the drum pulley 610 overlap in the front-rear direction of the drive unit 30.

  The second motor pulley 620 is attached to the root portion of the motor shaft 120 of the drive motor 100. The drum belt 630 is bridged between the drum pulley 610 and the second motor pulley 620.

  The blade pulley 510 corresponds to the first pulley of the present invention, and the blade belt 530 corresponds to the first belt of the present invention. The drum pulley 610 corresponds to the second pulley of the present invention, and the drum belt 630 corresponds to the second belt of the present invention.

  The clutch mechanism unit 700 switches the driving mode by the driving unit 30 between the biaxial driving mode, the uniaxial driving mode, and the rotor blade single driving mode. In the two-shaft drive mode, the drum shaft 200 and the drum pulley 610 are connected so that the rotation of the drum pulley 610 can be transmitted to the drum shaft 200, so that the drum 22 and the rotary blade 24 rotate at different rotational speeds. . In the uniaxial drive mode, the drum shaft 200 and the blade pulley 510 are connected so that the rotation of the blade pulley 510 can be transmitted to the drum shaft 200, so that the drum 22 and the rotor blade 24 rotate at the same rotational speed. . In the rotary blade single drive mode, the drum shaft 200 is not connected to either the blade pulley 510 or the drum pulley 610, whereby the rotary blade 24 rotates and the drum 22 stops. The biaxial drive mode corresponds to the first drive mode of the present invention, the rotary blade single drive mode corresponds to the second drive mode of the present invention, and the uniaxial drive mode corresponds to the third drive mode of the present invention. Equivalent to.

  Clutch mechanism 700 includes a clutch guide 710, a clutch body 720, a clutch lever 730, a lever support 740, and a clutch drive device 750.

  The clutch guide 710 and the clutch body 720 are disposed between the drum pulley 610 and the blade pulley 510 arranged in the axial direction of the drum shaft 200 and the blade shaft 300.

  As shown in FIGS. 6A to 6C, the clutch guide 710 has a cylindrical shape with a front surface opened. A spline 711 is formed on the entire outer circumferential surface of the clutch guide 710 over the entire circumference. An insertion hole 712 is formed at the center of the clutch guide 710. A keyway 713 is formed in the insertion hole 712. The clutch guide 710 has an insertion hole 712 passed through the drum shaft 200 and is fixed to the drum shaft 200 by a fixing method using a key groove 713 and a key (not shown). As a result, the clutch guide 710 rotates together with the drum shaft 200.

  As shown in FIG. 6A, the clutch body 720 includes a clutch part 721, a surrounding part 722, and a rolling bearing 723. The clutch part 721 has a cylindrical shape with the front and rear surfaces open. As shown in FIGS. 7A to 7C, a front spline 724 and a rear spline 725 are formed on the outer peripheral surface of the clutch portion 721 at the front portion and the rear portion, respectively, over the entire periphery.

  The inner diameter of the clutch part 721 is substantially equal to the outer diameter of the clutch guide 710, and the front and rear dimensions of the clutch part 721 are larger than the front and rear dimensions of the clutch guide 710. A clutch guide 710 is inserted into the clutch portion 721. An inner spline 726 is formed on the inner peripheral surface of the clutch portion 721 over the entire periphery, and the inner spline 726 is engaged with the spline 711 of the clutch guide 710. The dimension before and after the inner spline 726 is made larger than the dimension before and after the spline 711.

  Due to the engagement of the inner spline 726 and the spline 711, the clutch portion 721 can move in the axial direction of the drum shaft 200 with respect to the clutch guide 710, that is, the drum shaft 200 to which the clutch guide 710 is fixed. It is ready to rotate.

  The surrounding portion 722 is formed in an annular shape, and surrounds the central portion of the clutch portion 721 so that the clutch portion 721 is rotatable. A rolling bearing 723 is provided between the clutch portion 721 and the surrounding portion 722. The rolling bearing 723 is fixed so as not to move forward and backward by two large and small retaining rings 727 and 728. By the rolling bearing 723, the clutch portion 721 rotates smoothly with respect to the surrounding portion 722.

  The upper end of the clutch lever 730 is coupled to the enclosure 722 so as to be rotatable relative to the enclosure 722. Further, the clutch lever 730 is rotatably supported by a support shaft 741 provided on the lever support portion 740.

  Clutch drive device 750 includes an actuator 751 and an operation lever 752. The actuator 751 moves the operation lever 752 back and forth. The operation lever 752 is connected to the lower end portion of the clutch lever 730. The lower end portion of the clutch lever 730 is rotatable with respect to the operation lever 752.

  The lever support portion 740 and the clutch driving device 750 are fixed to a mounting plate (not shown), and this mounting plate is mounted on the bearing unit 400 or the outer tub 20.

  When the drive mode of the drive unit 30 is switched from the single-axis drive mode or the single rotor blade drive mode to the biaxial drive mode, the operation lever 752 is pulled into the actuator 751 as shown in FIG. That is, the operation lever 752 moves backward. The lower end portion of the clutch lever 730 is pulled by the operation lever 752 and moves rearward, and the clutch lever 730 rotates forward about the support shaft 741. The upper end portion of the clutch lever 730 moves forward, and the clutch body 720 is pushed by the upper end portion of the clutch lever 730 and moves forward. Thereby, the front spline 724 of the clutch part 721 and the spline 617 of the drum pulley 610 are engaged.

  When the front spline 724 and the spline 617 are engaged, the clutch portion 721 and the drum pulley 610 are fixed with respect to the rotation direction, so that the rotation of the drum pulley 610 can be transmitted to the drum shaft 200 via the clutch portion 721 and the clutch guide 710. It becomes a state. In this state, when the drive motor 100 rotates, the rotation is transmitted to the blade shaft 300 via the blade speed reduction mechanism 500, and the rotary blade 24 fixed to the blade shaft 300 rotates. The rotary blade 24 rotates at a rotational speed at which the rotational speed of the drive motor 100 is reduced according to the reduction ratio by the blade speed reduction mechanism 500. Further, the rotation of the drive motor 100 is transmitted to the drum shaft 200 via the drum reduction mechanism 600, and the drum 22 fixed to the drum shaft 200 rotates. The drum 22 rotates at a rotation speed at which the rotation speed of the drive motor 100 is reduced according to the reduction ratio by the drum reduction mechanism 600. As described above, since the reduction ratio by the drum reduction mechanism 600 is larger than the reduction ratio by the blade reduction mechanism 500, the rotary blade 24 rotates in the same direction as the drum 22 at a higher rotational speed than the drum 22.

  Here, the clutch portion 721 rotates together with the drum pulley 610, but the clutch lever 730 is connected to the surrounding portion 722 that is connected in a state where the clutch portion 721 is rotatable, so even if the clutch portion 721 rotates. The rotation is hardly transmitted to the clutch lever 730.

  Next, when the drive mode of the drive unit 30 is switched from the biaxial drive mode or the single rotor blade drive mode to the uniaxial drive mode, the operation lever 752 is pushed forward from the inside of the actuator 751 as shown in FIG. . The lower end portion of the clutch lever 730 is pushed forward by the operation lever 752 and moves forward, and the clutch lever 730 rotates backward about the support shaft 741. The upper end portion of the clutch lever 730 moves rearward, and the clutch body 720 is pushed by the upper end portion of the clutch lever 730 and moves rearward. As a result, the rear spline 725 of the clutch portion 721 and the spline 513 of the blade pulley 510 are engaged.

  When the rear spline 725 and the spline 513 are engaged, the clutch portion 721 and the blade pulley 510 are fixed with respect to the rotation direction, so that the rotation of the blade pulley 510 is transmitted to the drum shaft 200 via the clutch portion 721 and the clutch guide 710. It will be ready to communicate. In such a state, when the drive motor 100 rotates, the rotation is transmitted to the drum shaft 200 and the blade shaft 300 via the blade reduction mechanism 500, and the drum 22 and the rotating blade 24 rotate. The drum 22 and the rotary blade 24 rotate integrally in the same direction at a rotational speed at which the rotational speed of the drive motor 100 is reduced according to the reduction ratio by the blade reduction mechanism 500.

  In the uniaxial drive mode, when the drive motor 100 rotates, the drum pulley 610 also rotates with the rotation. However, the drum pulley 610 only idles with respect to the drum shaft 200, and the rotation of the drum pulley 610 is not transmitted to the drum shaft 200.

  Next, when the driving mode of the driving unit 30 is switched from the biaxial driving mode or the uniaxial driving mode to the rotary blade single driving mode, the front spline 724 is splined to the drum pulley 610 by the clutch lever 730 as shown in FIG. The clutch portion 721 is moved to a position where the rear spline 725 is not engaged with the blade pulley 510 without being engaged with 617. That is, the clutch mechanism 700 does not connect the drum shaft 200 to either the drum pulley 610 or the blade pulley 510.

  In such a state, when the drive motor 100 rotates, the rotor blade 24 rotates, but the rotation of any pulleys 510 and 610 is not transmitted to the drum shaft 200, so the drum 22 does not rotate.

  FIG. 8 is a block diagram showing a configuration of the drum type washing machine 1 according to the present embodiment.

  In addition to the configuration described above, the drum type washing machine 1 includes a control unit 801, a storage unit 802, an operation unit 803, a water level sensor 804, a motor drive unit 805, a water supply drive unit 806, a drainage drive unit 807, a clutch drive unit 808, a door. A lock device 809 and a drive current detection unit 810 are provided.

  The operation unit 803 includes a power button 803a, a start button 803b, and a course selection button 803c. The power button 803a is a button for turning on and off the power of the drum type washing machine 1. The start button 803b is a button for starting operation. The course selection button 803c is a button for selecting an arbitrary washing course from a plurality of washing courses related to the washing operation. The operation unit 803 outputs an input signal corresponding to the button operated by the user to the control unit 801.

  The water level sensor 804 detects the water level in the outer tub 20 and outputs a water level detection signal corresponding to the detected water level to the control unit 801.

  The motor drive unit 805 drives the drive motor 100 in accordance with a control signal from the control unit 801. The motor drive unit 805 includes a rotation sensor that detects the rotation speed of the drive motor 100, an inverter circuit, and the like, and adjusts drive power so that the drive motor 100 rotates at the rotation speed set by the control unit 801.

  The water supply drive unit 806 drives the water supply valve 51 in accordance with a control signal from the control unit 801. The drainage drive unit 807 drives the drainage valve 40 according to a control signal from the control unit 801. The clutch drive unit 808 drives the actuator 751 in accordance with a control signal from the control unit 801. The door lock device 809 locks and unlocks the door 12 according to a control signal from the control unit 801.

  The drive current detection unit 810 detects a drive current that flows through the drive motor 100 when the motor drive unit 805 is driving the drive motor 100, and outputs the detected drive current to the control unit 801.

  The storage unit 802 includes an EEPROM, a RAM, and the like. The storage unit 802 stores programs for executing washing operations of various washing operation courses. The storage unit 802 stores various parameters and various control flags used for executing these programs.

  The control unit 801 includes a motor drive unit 805, a water supply drive unit 806, and a drainage drive unit in accordance with programs stored in the storage unit 802 based on signals from the operation unit 803, the water level sensor 804, the drive current detection unit 810, and the like. 807, the clutch drive unit 808, the door lock device 809, and the like are controlled.

  Now, the drum type washing machine 1 performs washing operation of various operation courses based on the operation of the operation unit 803 by the user. In the washing operation, a washing process, an intermediate dehydration process, a rinsing process, and a final dehydration process are sequentially performed. Depending on the operation course, the intermediate dehydration step and the rinsing step may be performed twice or more.

  In the washing process and the rinsing process, the drive mode of the drive unit 30 is switched to the biaxial drive mode. Water is stored in the outer tub 20 to a predetermined water level that does not reach the lower edge of the charging port 11 so that the laundry in the drum 22 is immersed in water. Then, with the water stored in the outer tub 20 in this manner, the drive motor 100 alternately rotates forward or reverse as a washing operation or a rinsing operation, and the drum 22 and the rotary blade 24 are connected to the rotary blade 24. In a state where the rotational speed is faster than the rotational speed of the drum 22, the forward rotation and the reverse rotation are alternately performed. At this time, the drum 22 rotates at a rotational speed at which the centrifugal force acting on the laundry in the drum 22 is smaller than gravity.

  The laundry in the drum 22 is beaten against the inner peripheral surface of the drum 22 by being scraped and dropped by the baffle 23. In addition, at the rear part of the drum 22, the laundry comes into contact with the protruding portion 24a of the rotating rotor blade 24, and the laundry is rubbed against the protruding portion 24a or the laundry is stirred by the protruding portion 24a. . As a result, the laundry is washed or rinsed.

  In this way, at the time of washing and rinsing, not only the mechanical force due to the rotation of the drum 22 but also the mechanical force due to the rotary blades 24 is applied to the laundry, so an improvement in washing performance can be expected. In the intermediate dehydration process and the final dehydration process, the drive mode of the drive unit 30 is switched to the uniaxial drive mode. As the dehydration operation, the drive motor 100 rotates at a high speed in one direction, and the drum 22 and the rotary blade 24 rotate integrally at a rotational speed at which the centrifugal force acting on the laundry in the drum 22 becomes much larger than gravity. The laundry is pressed against the inner peripheral surface of the drum 22 by the action of the centrifugal force and dehydrated.

  As described above, since the drum 22 and the rotary blade 24 rotate integrally during the dehydration, the laundry stuck to the drum 22 is not agitated by the rotary blade 24 and the laundry is satisfactorily dehydrated. it can.

  In the present embodiment, blade pulley 510 having a reduction ratio smaller than that of drum pulley 610 is used in the single-shaft drive mode. For this reason, compared with the case where the drum pulley 610 is used, the rotation speed of the drive motor 100 at the time of dehydration can be made low, and the power consumption of the drive motor 100 can be suppressed. In addition, since the difference between the number of rotations at the time of easy washing and the number of rotations at the time of dehydration can be reduced, the drive motor 100 can be rotated in a region where the motor efficiency is good.

  FIG. 9 is a flowchart showing a control operation by the control unit 801 in the washing process and the rinsing process according to the present embodiment. FIG. 10A shows that the intertwined laundry is concentrated in the center of the drum 22 according to the present embodiment, and the rotor 24 is pressed by the laundry jammed between the door 12 and the rotor 24. FIG. 10B is a diagram schematically illustrating the state, and FIG. 10B illustrates a state in which the laundry that has been densely concentrated in the center of the drum 22 is loosened by the loosening operation and the laundry is separated from each other. It is a figure shown typically.

  Hereinafter, the control operation by the control unit 801 in the washing process and the rinsing process will be described with reference to FIGS. 9 to 10B.

  When the washing process or the rinsing process is started, the control unit 801 switches the driving mode of the driving unit 30 from the uniaxial driving mode to the biaxial driving mode by the clutch mechanism unit 700 (S101). Next, the control unit 801 supplies water into the outer tub 20 (S102). That is, the control unit 801 opens the water supply valve 51 to supply water into the outer tub 20, and when the water level in the outer tub 20 reaches a predetermined water level, the control unit 801 closes the water supply valve 51 and supplies the water into the outer tub 20. Stop water supply.

  When the water supply is completed, the control unit 801 alternately forwards or reverses the drive motor 100 as a washing operation or a rinsing operation (S103). For example, the on-time for normal rotation or reversal is about 10 to 20 seconds, and the off-time is about 1 second. Further, the drive motor 100 is rotated at a predetermined rotation number, for example, such that the drum 22 rotates at 45 rpm and the rotary blade 24 rotates at 90 rpm. As described above, the centrifugal force acting on the laundry in the drum 22 rotates at a rotational speed at which the drum 22 is smaller than gravity, and the rotary blade 24 rotates at a higher speed than the drum 22. The laundry is agitated or rubbed by the rotor blades 24 while tumbling in the drum 22.

  During the washing operation or the rinsing operation, the control unit 801 receives an input of a drive current value flowing through the drive motor 100 and monitors whether the input drive current value exceeds a predetermined threshold (S104). When the drive current value does not exceed the predetermined threshold value, if a predetermined operation time, for example, 20 minutes has not elapsed (S105: NO), the washing operation or the rinsing operation is continued.

  When it is easy to wash, the rotor blades 24 rotate at a rotational speed different from the rotational speed of the drum 22, so that the laundry is easily twisted in the drum 22 and the laundry is likely to be entangled. When such a fabric entanglement occurs, in the drum 22, the laundry is wound around the central portion of the rotary blade 24 by the rotation of the rotary blade 24, and pushed out on the axis of the rotary blade 24. Things move. When such laundry moves, when there is a lot of laundry put into the drum 22, as shown in FIG. 10A, the laundry entangled with the central portion of the drum 22 is densely packed. In addition, a large amount of laundry is packed between the door 12 and the rotor blade 24 and may be in a compressed state. If it becomes like this, it will become easy to apply the big load by the laundry to the rotary blade 24, and it will become easy to apply a big load to the drive motor 100.

  As described above, when the laundry is pressed against the rotary blade 24 due to the fabric entanglement in the drum 22 and a large load is applied to the rotary blade 24, the drive motor 100 is rotated at a predetermined rotational speed. Since a large amount of drive current is required, the drive current value becomes larger than the threshold value. In this case, a drive current value exceeding the threshold value is input from the drive current detection unit 810 to the control unit 801 as an opportunity input.

  If it is determined that the drive current value has exceeded the threshold value (S104: YES), the control unit 801 ends the washing operation or the rinsing operation, and the drive mechanism of the drive unit 30 is changed from the biaxial drive mode to the single rotor blade by the clutch mechanism unit 700. The driving mode is switched (S106). Next, as the loosening operation, the control unit 801 alternately rotates or reverses the drive motor 100 alternately in a shorter cycle than the washing operation or the rinsing operation in the biaxial drive mode (S107). For example, the on-time for normal rotation or inversion is about 0.5 seconds, and the off-time is about 0.5 seconds. Further, the drive motor 100 is set to a target rotational speed that rotates the rotor blade 24 at 1000 rpm, for example.

  While the drum 22 is stopped, the rotary blade 24 repeats forward rotation and reverse rotation in a short cycle. By the reversal rotation operation of the rotary blade 24, the entangled laundry is loosened, and the laundry that is densely arranged in the center of the drum 22 is separated from each other as shown in FIG. Thereby, the pressure of the laundry on the rotary blade 24 is eliminated, the load applied to the rotary blade 24 is reduced, and the load applied to the drive motor 100 is reduced.

  When the unwinding time set in advance as the time required for unraveling has elapsed (S108: YES), the control unit 801 ends the unraveling operation, and the drive mechanism of the drive unit 30 is changed from the single rotor blade drive form by the clutch mechanism 700. Switch to the biaxial drive mode (S109). Then, the control unit 801 again causes the drive motor 100 to rotate forward or reverse alternately as a washing operation or a rinsing operation (S103). Note that while the processing from S106 to S109 is being performed, the counting of the operation time is stopped.

  Thereafter, when the operation time elapses (S105: YES), the controller 801 ends the washing operation or the rinsing operation, opens the drain valve 40, and drains water from the outer tub 20 (S110). When the drainage is completed, the washing process or the rinsing process ends.

<Effect of Embodiment>
According to the present embodiment, when a drive current value exceeding a predetermined threshold is received as an opportunity input indicating that the load applied to the drive motor 100 has exceeded a predetermined magnitude, the drive unit 30 receives the drive current value based on the received drive current value. The drive mode is switched from the biaxial drive mode to the rotary blade single drive mode, and the rotary blade 24 rotates forward or reverse with the drum 22 stopped. Thereby, the laundry concentrated on the center part of the drum 22 is loosened, and the laundry is separated from each other. Therefore, the load applied to the drive motor 100 through the rotary blade 24 is reduced, and the lock of the drive motor 100 is suppressed. Moreover, since the deterioration of the movement of the laundry due to the fabric entanglement is eliminated, it is possible to prevent the cleaning performance from being deteriorated.

  Furthermore, according to the present embodiment, since the load on the drive motor 100 is detected by monitoring the drive current value, the rotation is performed only when the necessity increases. The laundry can be loosened by the single wing drive mode. Thereby, the washing process and the rinsing process are unnecessarily difficult to extend.

  Furthermore, according to the present embodiment, the drive unit 30 is realized with a simple configuration using a speed reduction mechanism including a belt and a pulley, and takes three drive modes: a two-axis drive mode, a single-axis drive mode, and a single rotor blade drive mode. Therefore, the reliability of the drive unit 30 can be increased in terms of failure, etc., compared to the case where a gear reduction mechanism is used.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments and the like, and various modifications can be made to the embodiments of the present invention in addition to the above. is there.

<Modification 1>
In the above embodiment, the drive current value is monitored by the drive current detection unit 810, so that the laundry is loosened by the single rotor blade drive mode when the load applied to the drive motor 100 exceeds a predetermined size. I have to. On the other hand, in this modified example, after the washing operation or the rinsing operation is started in the washing step or the rinsing step, the laundry is loosened regularly by the single rotor blade drive mode. Since the drive current value is not monitored, the drive current detection unit 810 is eliminated in this modification.

  FIG. 11 is a flowchart illustrating a control operation by the control unit 801 in the washing process and the rinsing process according to the first modification. In the flowchart of FIG. 11, the process of S104 is replaced with the process of S121, compared to the flowchart of FIG.

  In this modified example, during the washing operation or the rinsing operation, the control unit 801 determines whether or not the unwinding start time has come (S121). Specifically, the control unit 801 has a predetermined time (for example, 5 minutes) and a multiple of the fixed time (for example, 10 minutes, 15 minutes, etc.) from the start of the washing operation or the rinsing operation. When the time has elapsed, it is determined that the unwinding start time has come. In the present modification example, an input for a certain time and an input for a time that is a multiple of the certain time are triggered. Further, the fixed time and a time multiple of the fixed time correspond to the predetermined time of the present invention.

  When the unwinding start time is reached (S121: YES), the control unit 801 ends the washing operation or the rinsing operation, and the clutch mechanism unit 700 changes the drive mode of the drive unit 30 from the biaxial drive mode to the single rotor blade drive mode. Switching (S106).

  According to the configuration of this modified example, during the washing operation or the rinsing operation by the two-axis driving mode, the loosening operation by the single rotor blade driving mode is performed at an appropriate timing, so that the tangled laundry is concentrated on the central portion of the drum 22 Even if such a state occurs, such a state can be eliminated.

  Furthermore, according to the configuration of this modified example, it is not necessary to provide a detection unit for detecting a load applied to the drive motor 100, such as the drive current detection unit 810.

<Modification 2>
FIG. 12 is a flowchart illustrating a control operation by the control unit 801 in the washing process and the rinsing process according to the second modification. FIG. 13 is a diagram schematically illustrating a state in which the laundry after being loosened by the loosening operation is dispersed on the inner peripheral surface side of the drum 22 by the dispersing operation according to the second modification. In the flowchart of FIG. 12, compared with the flowchart of FIG. 9, the processes of S131 to S133 are added between the process of S108 and the process of S109.

  In the present modification example, when the unwinding time has elapsed (S108: YES) and the unwinding operation by the single rotor blade drive mode is completed, the control unit 801 changes the drive mode of the drive unit 30 by the clutch mechanism 700 to the single rotor blade drive mode. Is switched to the uniaxial drive mode (S131). Then, the control unit 801 rotates the drum 22 and the rotor blade 24 so as to rotate integrally at a rotational speed at which the centrifugal force acting on the laundry in the drum 22 is greater than the gravity, for example, 120 rpm, as a dispersion operation. The drive motor 100 is rotated in one direction by a number (S132). As shown in FIG. 13, the laundry that has been separated by the unwinding operation is pushed outward by the centrifugal force generated by the dispersion operation and dispersed toward the inner peripheral surface side of the drum 22. To do. Thereby, the pressure of the laundry on the rotary blade 24 is further eliminated, and the load applied to the rotary blade 24 is further reduced.

  When the dispersion time set in advance as the time necessary for dispersion has elapsed (S133: YES), the control unit 801 ends the dispersion operation, and the drive mechanism of the drive unit 30 is changed from the single-axis drive form to the biaxial by the clutch mechanism part 700. The driving mode is switched (S109). Then, the control unit 801 again causes the drive motor 100 to rotate forward or reverse alternately as a washing operation or a rinsing operation (S103).

  According to the configuration of this modified example, the load applied to the drive motor 100 through the rotary blade 24 is further reduced, and the lock of the drive motor 100 is further suppressed.

  Note that the process of S104 of this modification may be replaced with the process of S121 of Modification 1. In this case, the loosening operation by the rotor blade single drive mode and the dispersion operation by the single axis drive mode are periodically performed at an appropriate timing.

<Other changes>
In the above-described embodiment, the drive current flowing through the drive motor 100 is detected by the drive current detection unit 810, whereby the magnitude of the load applied to the drive motor 100 is determined. However, the magnitude of the load applied to the drive motor 100 may be determined by other methods. For example, the rotational speed of the drive motor 100 is detected, and the magnitude of the load applied to the drive motor 100 is determined depending on whether the rotational speed reaches the rotational speed set for the washing operation or the rinsing operation. It may be. Further, the magnitude of the load applied to the drive motor 100 may be determined based on the time until the rotation speed of the drive motor 100 reaches the set rotation speed.

  In the above-described embodiment, the drive unit 30 having the three drive modes of the two-axis drive mode, the single-axis drive mode, and the rotor blade single-side drive mode is realized by using a speed reduction mechanism using a belt and a pulley. You may make it implement | achieve the drive part 30 which takes the said 3 drive form using a deceleration mechanism.

  Furthermore, in the above embodiment, the loosening operation by the single rotor blade drive mode is performed in both the washing process and the rinsing process. However, such a loosening operation may be performed only in either the washing step or the rinsing step.

  Furthermore, in the above-described embodiment, the drum 22 rotates around the tilt axis tilted with respect to the horizontal direction. However, the drum type washing machine 1 may be configured such that the drum 22 rotates about the horizontal axis.

  Furthermore, although the 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 washing and drying machine.

  In addition, the embodiment of the present invention can be variously modified as appropriate within the scope of the technical idea shown in the claims.

10 housing
20 Outer tank
22 drums
24 Rotating blade (Rotating body)
24a Projection
30 Drive unit
100 drive motor
200 Drum shaft (second rotary shaft)
300 Blade axis (first rotation axis)
510 Wing pulley (first pulley)
530 Wing belt (first belt)
610 Drum pulley (second pulley)
630 Drum belt (second belt)
700 Clutch mechanism
801 control unit

Claims (6)

An outer tub disposed in the housing;
A drum arranged in the outer tub and rotatable around a horizontal axis or an inclined axis inclined with respect to the horizontal direction;
A rotating body disposed in the drum and having a protrusion on the surface that contacts the laundry;
Including a drive motor, transmitting the torque of the drive motor to the drum and the rotating body, and rotating the drum and the rotating body at different rotational speeds; and the torque of the drive motor A drive unit capable of operating according to a second drive mode for transmitting to the rotating body without rotating to the drum and rotating the rotating body;
A control unit for controlling the operation of the drive unit,
In the washing step and / or the rinsing step, the control unit
The drum and the rotating body are rotated forward or reverse by the first drive mode,
Based on receiving a predetermined trigger input, the rotating body is rotated forward or reverse by the second drive mode,
A drum-type washing machine characterized by that. In the drum type washing machine according to claim 1,
An input indicating that the load applied to the drive motor exceeds a predetermined magnitude is the trigger input,
A drum-type washing machine characterized by that. In the drum type washing machine according to claim 1,
An input indicating that a predetermined time has elapsed since the rotation of the drum and the rotating body according to the first driving mode is started is the trigger input.
A drum-type washing machine characterized by that. In the drum type washing machine according to any one of claims 1 to 3,
The driving unit is capable of operating in a third driving mode in which torque of the driving motor is transmitted to the drum and the rotating body to integrally rotate the drum and the rotating body at the same number of rotations.
A drum-type washing machine characterized by that. In the drum type washing machine according to claim 4,
The control unit rotates the rotating body according to the second driving mode, and then rotates the drum according to the third driving mode before rotating the drum and the rotating body again according to the first driving mode. The centrifugal force acting on the laundry in the drum is rotated at a rotational speed that is greater than gravity.
A drum-type washing machine characterized by that. In the drum type washing machine according to claim 4 or 5,
The drive unit is
A first rotating shaft fixed to the rotating body;
A second rotating shaft fixed to the drum;
A first pulley fixed to the first rotating shaft and coupled to the drive motor via a first belt;
A second pulley connected to the drive motor via a second belt and having a different outer diameter from the first pulley;
The drive mode by the drive unit is switched to the first drive mode by connecting the second rotary shaft and the second pulley so that the rotation of the second pulley can be transmitted to the second rotary shaft. The second rotation shaft is not connected to either the first pulley or the second pulley, thereby switching to the second drive mode, so that the rotation of the first pulley can be transmitted to the second rotation shaft. A clutch mechanism that switches to the third drive mode by connecting the second rotating shaft and the first pulley,
A drum-type washing machine characterized by that.

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