JP2015229088A - Drum type washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drum type washing machine which, when laundry comes into a state of being attached to a drum by dewatering, can reduce the attachment.SOLUTION: A drum type washing machine includes: an agitator 24 arranged at a rear part of a drum 22; a drive unit capable of rotating the drum 22 and the agitator 24 by a single-axis driving mode for rotating the drum 22 and the agitator 24 integrally so that the rotational speed of the agitator 24 becomes equal to the rotational speed of the drum 22, and by a double-axis driving mode for rotating the drum 22 and the agitator 24 separately so that the rotational speed of the agitator 24 becomes faster than the rotational speed of the drum 22; and a control unit for controlling the operation of the drive unit. The control unit, following a dewatering step, executes a separation step of separating laundry attached to the drum 22 in the dewatering step by the contact of the agitator 24 to the laundry by allowing the drive unit to perform rotation of the drum 22 and the agitator 24 by the double-axis driving mode.

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. Laundry is performed by hitting the surface (see Patent Document 1).

  In such a drum-type washing machine, the laundry is dehydrated by rotating the drum at a high speed and pressing the laundry against the inner surface of the drum by centrifugal force.

JP 2013-240577 A

  In the drum type washing machine, when the dehydration is finished, the laundry tends to stick to the inner peripheral surface of the drum. For example, if the laundry is stuck to the drum due to the final dehydration in the washing operation, the laundry can be peeled off from the drum if the washing stuck to the drum can be reduced by the end of the washing operation. Since the work is reduced, the user can easily take out the laundry. In addition, for example, when a drum-type washing machine has a drying function and the drying operation is performed after the washing operation, if the state where the laundry is stuck to the drum can be reduced before the drying operation, the drying operation can be performed. The laundry can be satisfactorily stirred from the beginning, and improvement in drying performance can be expected.

  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 reduce the sticking of laundry when the laundry is stuck to the drum by dehydration.

  A main aspect of the present invention relates to a drum type washing machine that performs a washing operation including a washing step, a rinsing step, and a dehydrating step. A drum-type washing machine according to this aspect 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, and the drum A rotating body that is disposed at the rear and has a protrusion on the surface that contacts the laundry; and the drum and the rotating body rotate together so that the rotating speed of the rotating body is equal to the rotating speed of the drum. The drum and the rotating body are rotated by a uniaxial driving form for rotating the drum and the rotating body separately so that the rotating speed of the rotating body is higher than the rotating speed of the drum. And a control unit that controls the operation of the drive unit. The control unit performs the dehydration step by causing the driving unit to rotate the drum and the rotating body according to the uniaxial driving mode. Furthermore, the control unit causes the drive unit to rotate the drum and the rotating body according to the biaxial drive mode following the dehydration step, whereby the laundry stuck to the drum in the dehydration step. The peeling process which peels by the contact of the said rotary body to the said laundry is performed.

  According to said structure, since the laundry stuck on the drum at the dehydration process can be peeled off by the peeling process following the dehydration process, the sticking of the laundry to the drum can be reduced.

  In the drum type washing machine according to this aspect, the dewatering step may include an intermediate dewatering step that is performed before the rinsing step and a final dewatering step that is performed at the end of the washing operation. In this case, the control unit may be configured to execute the peeling step subsequent to the final dehydration step.

  According to said structure, the sticking of the laundry to the drum which arose in the final dehydration process can be reduced. Therefore, when the laundry is taken out after the end of the washing operation, the user can easily take out the laundry. Further, when the drying operation is performed after the washing operation, an improvement in drying performance can be expected.

  When it is set as such a structure, the said control part may be set as the structure which performs the said peeling process before the said rinse process following the said intermediate | middle dehydration process.

  If it is set as such a structure, the sticking of the laundry to the drum which arises in the intermediate | middle dehydration process can be reduced before a rinse process is started. Therefore, the laundry can be satisfactorily stirred in the rinsing step, and improvement in rinsing performance can be expected.

  In the drum type washing machine according to this aspect, the control unit may be configured to cause the driving unit to perform normal rotation and reverse rotation of the drum and the rotating body in the biaxial driving mode in the peeling step.

  According to the above configuration, by rotating the drum and the rotating body forward and backward, it is possible to apply force due to contact with the rotating body from two different directions to the laundry stuck to the drum. Easy to peel off from the drum.

  In the drum type washing machine according to this aspect, the control unit performs the washing step and the rinsing step by causing the driving unit to rotate the drum and the rotating body according to the biaxial driving mode. Can be.

  According to the above configuration, in the washing step and the rinsing step, the laundry in the drum is not only struck against the inner peripheral surface of the drum by stirring by the rotation of the drum, but is also rubbed by the protruding portion of the rotating rotating body. Or stirred. Accordingly, the cleaning performance can be improved as compared with the configuration in which the laundry is merely stirred by the rotation of the drum.

  According to the present invention, it is possible to provide a drum type washing machine that can reduce the sticking of laundry when the laundry is stuck to the drum by dehydration.

  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.

It is side surface sectional drawing which shows the structure of the drum type washing machine based on embodiment. It is sectional drawing which shows the structure of the drive unit based on embodiment. It is sectional drawing which shows the structure of the drive unit based on embodiment. It is a front view of the rotor which shows the structure of the rotor of the drive motor based on Embodiment. It is an expansion perspective view of the rear part of the bearing unit in which the spline was formed based on embodiment. It is a figure which shows the structure of the clutch body of a clutch mechanism part based on embodiment. It is a block diagram which shows the structure of the drum type washing machine based on embodiment. It is a figure which shows each process in the washing operation based on embodiment. It is a flowchart which shows the control processing in the peeling process based on embodiment. It is a figure which shows the state of the laundry in a drum before a peeling process based on embodiment, during a peeling process, and after a peeling process. It is a figure which shows each process in the washing operation based on the example of a change.

  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 the configuration of the drum type washing machine 1.

  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 large number of dewatering holes 22 b are formed on the inner peripheral surface 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 stirring body 24 is rotatably disposed at the rear portion of the drum 22. The stirring body 24 has a substantially disk shape. A plurality of blades 24 a extending radially from the central portion are formed on the surface of the stirring body 24. The stirring body 24 rotates coaxially with the drum 22. The stirrer 24 corresponds to the rotating body of the present invention, and the blade 24a corresponds to the protruding portion of the present invention.

  A drive unit 30 that generates torque for driving the drum 22 and the stirring body 24 is disposed behind the outer tub 20. The drive unit 30 corresponds to the drive unit of the present invention. The drive unit 30 rotates the drum 22 and the stirring body 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 smaller than gravity, and the stirring member 24 is faster than the rotation speed of the drum 22. Rotate with On the other hand, during the dehydration process, the drive unit 30 integrally rotates the drum 22 and the stirring body 24 at a rotational speed at which the centrifugal force applied to the laundry in the drum 22 is much greater than 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 and 3 are cross-sectional views showing the configuration of the drive unit 30. FIG. FIG. 2 shows a state where the drive form of the drive unit 30 is switched to the biaxial drive form, and FIG. 3 shows a state where the drive form of the drive unit 30 is switched to the uniaxial drive form. FIG. 4 is a front view of the rotor 110 showing the configuration of the rotor 110 of the drive motor 100. FIG. 5 is an enlarged perspective view of the rear part of the bearing unit 500 in which the spline 514 is formed. 6A to 6C are diagrams showing the configuration of the clutch body 610 of the clutch mechanism portion 600, and are a front view, a right side view, and a rear view of the clutch body 610, respectively.

  The drive unit 30 includes a drive motor 100, a blade shaft 200, a drum shaft 300, a planetary gear mechanism 400, a bearing unit 500, and a clutch mechanism unit 600. The drive motor 100 generates torque for driving the stirrer 24 and the drum 22. The blade shaft 200 is rotated by the torque of the drive motor 100 and transmits the rotation to the stirring body 24. The planetary gear mechanism 400 decelerates the rotation of the blade shaft 200, that is, the rotation of the rotor 110 of the drive motor 100 and transmits it to the drum shaft 300. The drum shaft 300 rotates coaxially with the blade shaft 200 at a rotational speed reduced by the planetary gear mechanism 400 and transmits the rotation to the drum 22. The bearing unit 500 rotatably supports the blade shaft 200 and the drum shaft 300. The clutch mechanism 600 rotates the agitator 24, that is, the blade shaft 200 at a rotational speed equal to the rotational speed of the drive motor 100, and the drum 22, that is, the drum shaft 300, at a rotational speed reduced by the planetary gear mechanism 400. The two-shaft drive mode capable of rotating, and the agitator 24 and the drum 22, that is, the blade shaft 200, the drum shaft 300, and the planetary gear mechanism 400, can be integrally rotated at a rotational speed equal to that of the drive motor 100. The drive mode of the drive unit 30 is switched between possible uniaxial drive modes.

  The drive motor 100 is an outer rotor type DC brushless motor, and includes a rotor 110 and a stator 120. The rotor 110 is formed in a bottomed cylindrical shape, and permanent magnets 111 are arranged on the entire inner circumferential surface thereof. As shown in FIG. 4, a circular boss 112 is formed at the center of the rotor 110. A boss hole 113 for fixing the blade shaft 200 is formed in the boss part 112, and an annular engaged recess 114 is formed on the outer periphery of the boss hole 113. The outer peripheral part of the engaged recessed part 114 has the uneven | corrugated | grooved part 114a over the perimeter.

  The stator 120 has a winding 121 on the outer periphery. When a driving current is supplied to the winding 121 of the stator 120 from a motor driving unit described later, the rotor 110 rotates.

  The drum shaft 300 has a hollow shape and includes the blade shaft 200 and the planetary gear mechanism 400. The drum shaft 300 bulges outward at the center, and the bulged portion serves as a housing portion for 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 planetary gears 430 interposed between the sun gear 410 and the internal gear 420, and the planetary gears 430 rotating. And a planet carrier 440 that is freely held.

  The sun gear 410 is fixed to the blade shaft 200, and the internal gear 420 is fixed to the drum shaft 300. The set of planetary 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 extending rearward. The carrier shaft 441 is coaxial with the drum shaft 300, and the inside thereof is formed hollow because the blade shaft 200 is inserted.

  The rear end portion of the blade shaft 200 protrudes rearward from the carrier shaft 441 and is fixed to the boss hole 113 of the rotor 110.

  The bearing unit 500 is provided with a cylindrical bearing portion 510 at the center. Inside the bearing 510, rolling bearings 511 and 512 are provided at the front and rear, and a mechanical seal 513 is provided at the front end. An outer peripheral surface of the drum shaft 300 is received by the rolling bearings 511 and 512 and smoothly rotates in the bearing portion 510. Further, the mechanical seal 513 prevents water from entering between the bearing portion 510 and the drum shaft 300. As shown in FIG. 5, a spline 514 is formed on the inner surface of the rear end portion of the bearing portion 510 over the entire circumference.

  In the bearing unit 500, a fixed flange portion 520 is formed around the bearing portion 510. A mounting boss 521 is formed at the lower end of the fixed flange portion 520.

  The bearing unit 500 is fixed to the rear surface of the outer tub 20 by a fixing method such as screwing at the fixing flange portion 520. In a state where the drive unit 30 is mounted on the outer tub 20, the blade shaft 200 and the drum shaft 300 face the inside of the outer tub 20. The drum 22 is fixed to the drum shaft 300, and the stirring body 24 is fixed to the blade shaft 200.

  Clutch mechanism portion 600 includes a clutch body 610, a clutch spring 620, a clutch lever 630, a lever support portion 640, a clutch drive device 650, and a mounting plate 660.

  As shown in FIGS. 6A to 6C, the clutch body 610 has a substantially disk shape. An annular spline 611 is formed on the outer peripheral surface of the front end portion of the clutch body 610. The spline 611 is formed to engage with the spline 514 of the bearing unit 500. A flange portion 612 is formed on the outer peripheral surface of the clutch body 610 behind the spline 611. Further, the clutch body 610 is formed with an annular engagement flange portion 613 at the rear end. The engaging flange portion 613 has the same shape as the engaged recessed portion 114 of the rotor 110, and has an uneven portion 613a on the entire outer periphery. When the engaging flange portion 613 is inserted into the engaged concave portion 114, the concave and convex portions 613a and 114a are engaged with each other.

  A carrier shaft 441 is inserted into the shaft hole 614 of the clutch body 610. A spline 614 a formed on the inner peripheral surface of the shaft hole 614 engages with a spline 441 a formed on the outer peripheral surface of the carrier shaft 441. As a result, the clutch body 610 is allowed to move in the front-rear direction with respect to the carrier shaft 441 and is restricted from rotating in the circumferential direction.

  In the clutch body 610, an annular housing groove 615 is formed outside the shaft hole 614, and the clutch spring 620 is housed in the housing groove 615. The clutch spring 620 has one end in contact with the rear end portion of the bearing portion 510 and the other end in contact with the bottom surface of the housing groove 615.

  At the upper end portion of the clutch lever 630, a pressing portion 631 that contacts the rear surface of the flange portion 612 of the clutch body 610 and pushes the flange portion 612 forward is formed.

  The clutch lever 630 has a support shaft 632, and the support shaft 632 is rotatably supported by the lever support portion 640. A spring 641 is interposed between the clutch lever 630 and the lever support 640. The spring 641 is a tension spring, and the clutch lever 630 is pulled in the direction in which the lower end thereof moves forward by the elastic force of the spring 641.

  Clutch drive device 650 includes a torque motor 651 and a disc-shaped cam 652 that rotates around the horizontal axis by the torque of torque motor 651. The upper surface of the cam 652 comes into contact with the lower end portion of the clutch lever 630. The upper surface of the cam 652 has a first contact surface 652a with a high height provided on one end side, a second contact surface 652b with a low height provided on the other end side, and a first contact surface 652a and a second contact. And an inclined surface 652c connecting the surface 652b.

  The lever support 640 and the clutch driving device 650 are fixed to the mounting plate 660 by a fixing method such as screwing. The mounting plate 660 is fixed to the mounting boss 521 of the bearing unit 500 with screws.

  When the drive mode of the drive unit 30 is switched from the single-axis drive mode to the biaxial drive mode, as shown in FIG. 2, the first contact surface 652a is positioned upward and the second contact surface 652b is positioned by the torque motor 651. The cam 652 is rotated so as to be positioned below. As the cam 652 rotates, the lower end portion of the clutch lever 630 is sequentially pushed by the inclined surface 652c and the first contact surface 652a and moves rearward. The clutch lever 630 rotates forward about the support shaft 632, 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 spline 611 of the clutch body 610 and the spline 514 of the bearing unit 500 are engaged.

  When the spline 611 and the spline 514 are engaged with each other, the clutch body 610 is restricted from rotating in the circumferential direction with respect to the bearing unit 500 and cannot rotate. Therefore, the carrier shaft 441 of the planetary gear mechanism 400, The planet carrier 440 is fixed so as not to rotate. In such a state, when the rotor 110 rotates, the blade shaft 200 rotates at a rotation speed equal to the rotation speed of the rotor 110, and the stirring body 24 connected to the blade shaft 200 also rotates at a rotation speed equal to the rotation speed of the rotor 110. Rotate with. As the blade shaft 200 rotates, the sun gear 410 rotates in the planetary gear mechanism 400. As described above, since the planet 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 is the sun gear. Rotate in the same direction as 410. As a result, the drum shaft 300 fixed to the internal gear 420 rotates in the same direction as the blade shaft 200 at a lower rotational speed than the blade shaft 200, and the drum 22 fixed to the drum shaft 300 is more than the stirrer 24. It rotates in the same direction as the stirring member 24 at a low rotational speed. In other words, the stirring member 24 rotates in the same direction as the drum 22 at a rotational speed faster than that of the drum 22.

  On the other hand, when the form of the drive unit 30 is switched from the biaxial drive form to the uniaxial drive form, the second contact surface 652b is positioned upward by the torque motor 651 as shown in FIG. The cam 652 is rotated so that is positioned below. As the cam 652 rotates, the lower end of the clutch lever 630 moves forward along the inclined surface 652c and the second contact surface 652b by the elastic force of the spring 641. The clutch lever 630 rotates backward about the support shaft 632, 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 recess 114 of the rotor 110 are engaged.

  When the engagement flange portion 613 and the engaged recess 114 are engaged, the rotation of the clutch body 610 in the circumferential direction with respect to the rotor 110 is restricted, and the clutch body 610 becomes rotatable with the rotor 110. In such a state, when the rotor 110 rotates, the blade shaft 200 and the clutch body 610 rotate at a rotational speed equal to the rotational speed of the rotor 110. At this time, in the planetary gear mechanism 400, the sun gear 410 and the planet carrier 440 rotate at the same rotational speed as the rotor 110. As a result, the internal gear 420 rotates at the same rotational speed as the sun gear 410 and the planet carrier 440, and the drum shaft 300 fixed to the internal gear 420 rotates at the same rotational speed as the rotor 110. That is, in the drive unit 30, the blade shaft 200, the planetary gear mechanism 400, and the drum shaft 300 rotate together. Thereby, the drum 22 and the stirring body 24 rotate integrally.

  FIG. 7 is a block diagram showing the configuration of the drum type washing machine 1.

  In addition to the configuration described above, the drum type washing machine 1 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 drainage drive unit 707, a clutch drive unit 708, and a door. A locking device 709 is provided.

  The operation unit 703 includes a power button 703a, a start button 703b, and a course selection button 703c. The power button 703 a 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 operation. The course selection button 703c is a button for selecting an arbitrary driving course from a plurality of driving courses 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 tub 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 in accordance with a control signal from the control unit 701. The water supply drive unit 706 supplies a drive current to the water supply valve 51 in accordance with a control signal from the control unit 701. The drain drive unit 707 supplies a drive current to the drain valve 40 in accordance with a control signal from the control unit 701.

  Clutch drive device 650 includes a first detection sensor 653 and a second detection sensor 654. The first detection sensor 653 detects that the drive mode of the drive unit 30 has been switched to the biaxial drive mode, and outputs a detection signal to the control unit 701. The second detection sensor 654 detects that the drive mode of the drive unit 30 has been switched to the uniaxial drive 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 in accordance with a control signal output from the control unit 701 based on detection signals from the first detection sensor 653 and the second detection sensor 654.

  The door lock device 709 locks and unlocks the door 12 according to a control signal from the control unit 701.

  The storage unit 702 includes an EEPROM, a RAM, and the like. The storage unit 702 stores programs for executing washing operations of various washing operation courses. The storage unit 702 stores various parameters and various control flags used for executing these programs.

  The control unit 701 is based on each signal from the operation unit 703, the water level sensor 704, etc., and according to a program stored in the storage unit 702, a motor driving unit 705, a water supply driving unit 706, a drainage driving unit 707, and a clutch driving unit 708. Control the door lock device 709 and the like.

  The drum type washing machine 1 performs a washing operation of various operation courses based on a user's selection operation by the course selection button 703c. As shown in FIG. 8, in the washing operation, a washing process, an intermediate dehydration process, a rinsing process, and a final dehydration process are executed in order. Depending on the operation course, the intermediate dehydration step and the rinsing step may be performed twice or more.

  In the washing step and the rinsing step, water is accumulated in the outer tub 20 to a predetermined water level that does not reach the lower edge of the inlet 11 so that the laundry in the drum 22 is immersed in water. Alternately, forward and reverse. Thereby, the drum 22 and the stirring member 24 alternately rotate forward and reverse in a state where the rotation speed of the stirring member 24 is faster than the rotation speed of the drum 22. At this time, the drum 22 rotates at a rotational speed at which the centrifugal force acting on the laundry becomes 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 blades 24a of the rotating stirring body 24, and the laundry is rubbed against the blades 24a or the laundry is stirred by the blades 24a. As a result, the laundry is washed or rinsed.

  In the intermediate dewatering process and the final dewatering process, the drive motor 100, that is, the drum 22 and the stirring body 24 rotate at a rotation 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.

  After the intermediate dehydration step and the final dehydration step, the laundry often remains attached to the inner peripheral surface of the drum 22. When the laundry operation is completed while the laundry is stuck to the drum 22, the user is forced to remove the laundry from the drum 22 when taking out the laundry. Therefore, it becomes difficult to take out the laundry.

  Therefore, in the present embodiment, the peeling step is performed following the final dehydration step. In the peeling process, the drum 22 and the stirring body 24 rotate so that the rotation speed of the stirring body 24 is faster than the rotation speed of the drum 22 in a state where there is no water in the drum 22, and the washing stuck to the drum 22. Objects are peeled off by the contact of the stirring member 24 with the laundry.

  Control processing by the control unit 701 in the peeling process will be described in detail with reference to FIGS. 9 and 10.

  FIG. 9 is a flowchart showing a control process in the peeling process. FIGS. 10A, 10B, and 10C are views showing the state of the laundry in the drum 22 before the peeling process, during the peeling process, and after the peeling process, respectively.

  As shown in FIG. 10A, before the peeling process, the laundry in the drum 22 is stuck to the inner peripheral surface of the drum 22 by the dehydration in the final dehydration process.

  When the peeling process is started, the control unit 701 operates the torque motor 651 to switch the drive mode of the drive unit 30 to the biaxial drive mode (S101). When the switching to the biaxial drive mode is confirmed based on the detection result of the first detection sensor 653, the control unit 701 causes the drive motor 100 to rotate forward (S102). The drum 22 rotates forward at a rotational speed at which the centrifugal force acting on the laundry becomes smaller than gravity. Further, the stirring body 24 rotates forward at a higher speed than the drum 22. When the predetermined first time has elapsed (S103: YES), the control unit 701 stops the drive motor 100 (S104).

  Next, the control unit 701 reverses the drive motor 100 at the same speed as during normal rotation (S105). The drum 22 and the stirring body 24 are reversed at the same speed as that during forward rotation. When the predetermined second time has elapsed (S106: YES), the control unit 701 stops the drive motor 100 (S107). The second time may be the same time as the first time or may be a different time.

  When the drum 22 and the stirring member 24 are rotated forward and backward, the laundry stuck to the inner peripheral surface of the drum 22 comes into contact with the stirring member 24 that rotates faster than the drum 22 as shown in FIG. Then, the force is received from the stirring member 24 and peeled off from the inner peripheral surface of the drum 22.

  If the number of forward rotations and reverse rotations of the drum 22 and the stirring member 24 has not reached a predetermined number (for example, 2 times) (S108: NO), the control unit 701 performs the processing from step S102 to step S107 again. . As a result, the drum 22 and the stirring member 24 repeat normal rotation and reverse rotation a predetermined number of times.

  When the number of forward rotations and reverse rotations of the drum 22 and the stirring body 24 reaches a predetermined number (S108: YES), the control unit 701 operates the torque motor 651 to switch the drive mode of the drive unit 30 to the uniaxial drive mode. (S109). Thus, the control process of the peeling process ends. As shown in FIG. 10C, after the peeling step, the laundry is peeled from the drum 22 and is loosened.

<Effect of Embodiment>
As described above, according to the present embodiment, the peeling step is performed following the final dehydration step, and in this peeling step, the drum 22 and the stirring body 24 are rotated at the rotational speed of the stirring body 24. The laundry is rotated so as to be faster than the rotational speed, and the laundry stuck to the drum 22 is peeled off by contact of the agitator 24 with the laundry. Thereby, since the sticking of the laundry to the drum 22 can be reduced, the work of peeling the laundry from the drum 22 when taking out the laundry is reduced, and the user can easily take out the laundry.

  Furthermore, according to the present embodiment, in the peeling step, the drum 22 and the stirring body 24 are rotated forward and reverse, so that the laundry stuck to the drum 22 is separated from the stirring body 24 from two different directions. Thus, the laundry can be easily peeled from the drum 22.

  Furthermore, according to the present embodiment, in the washing step and the rinsing step, the drum 22 and the stirring body 24 rotate so that the rotation speed of the stirring body 24 is faster than the rotation speed of the drum 22. Thereby, the laundry in the drum 22 is not only struck by the inner peripheral surface of the drum 22 by the stirring by the rotation of the drum 22, but is also rubbed by the blades 24a of the rotating stirring body 24. Accordingly, the cleaning performance can be improved as compared with the configuration in which the laundry is merely stirred by the rotation of the drum 22.

<Example of change>
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.

  For example, in the above-described embodiment, the peeling step is performed following the final dehydration step. However, as shown in FIG. 11, a configuration in which the peeling process is executed not only after the final dehydration process but also after the intermediate dehydration process may be employed. In this case, since the rinsing process is started in a state where the laundry is peeled from the drum 22 and loosened, the laundry can be satisfactorily stirred in the rinsing process, and an improvement in rinsing performance can be expected.

  Further, in the peeling step, before rotating the drum 22 and the stirrer 24 in the biaxial drive mode, the drive unit 30 causes the drum 22 and the stirrer 24 in the single-axis drive mode to perform normal rotation and reverse rotation in a short time. You may make it rock 22 right and left. Since the laundry attached to the drum 22 can be easily peeled off by swinging the drum 22, the effect of peeling the laundry when the drum 22 and the stirring body 24 are rotated by the biaxial drive mode is achieved. Can be increased.

  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 this case, a drying operation is performed following the peeling step. Since the laundry is peeled off from the drum 22 and the drying operation is started in a loosened state, the laundry can be stirred well in the drying operation, and improvement in drying performance can be expected.

  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 Stirring body (rotating body)
24a Feather (projection)
30 Drive unit (drive unit)
701 control unit

Claims (5)

In a drum-type washing machine that performs a washing operation including a washing step, a rinsing step, and a dehydration step,
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 at the rear of the drum and having a protrusion on the surface that contacts the laundry;
A uniaxial drive mode in which the drum and the rotating body are rotated integrally so that the rotating speed of the rotating body is equal to the rotating speed of the drum, and the rotating speed of the rotating body is faster than the rotating speed of the drum. A drive unit capable of rotating the drum and the rotating body by a biaxial drive mode in which the drum and the rotating body are rotated separately;
A control unit for controlling the operation of the drive unit,
The controller is
By causing the driving unit to rotate the drum and the rotating body according to the uniaxial driving mode, the dehydrating step is executed,
Subsequent to the dehydration step, by causing the drive unit to rotate the drum and the rotating body according to the biaxial drive mode, the laundry stuck to the drum in the dehydration step is applied to the laundry. Performing a peeling step for peeling by contact of the rotating body;
A drum-type washing machine characterized by that. In the drum type washing machine according to claim 1,
The dehydration step includes an intermediate dehydration step performed before the rinsing step, and a final dehydration step performed at the end of the washing operation,
The controller performs the peeling step subsequent to the final dehydration step.
A drum-type washing machine characterized by that. In the drum type washing machine according to claim 2,
The controller executes the peeling step before the rinsing step following the intermediate dehydration step,
A drum-type washing machine characterized by that. In the drum type washing machine according to any one of claims 1 to 3,
The control unit causes the driving unit to perform normal rotation and reverse rotation of the drum and the rotating body in the biaxial driving mode in the peeling step.
A drum-type washing machine characterized by that. In the drum type washing machine according to any one of claims 1 to 4,
The control unit executes the washing step and the rinsing step by causing the driving unit to rotate the drum and the rotating body according to the biaxial drive mode.
A drum-type washing machine characterized by that.

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