WO2015185008A1

WO2015185008A1 - Drum washing machine

Info

Publication number: WO2015185008A1
Application number: PCT/CN2015/080822
Authority: WO
Inventors: 辻贵裕; 田中启之
Original assignee: 海尔亚洲株式会社; 青岛海尔洗衣机有限公司
Priority date: 2014-06-06
Filing date: 2015-06-04
Publication date: 2015-12-10
Also published as: JP2015229087A; JP6385146B2

Abstract

Provided is a drum-type washing machine able to improve washing performance and prevent drive system problems. The drum-type washing machine is provided with: an agitating body arranged at the rear of the drum; a drive unit able to cause rotation of the drum and of the agitating body by means of a double drive-shaft form or a single drive-shaft form, the double drive-shaft form causing the drum and the agitating body to rotate separately, with the agitating body rotating at a speed superior to that of the drum, and the single drive-shaft form causing the drum and the agitating body to rotate as a single unit, with the agitating body rotating at a speed identical to that of the drum; and a control portion for controlling the actions of the drive unit. During the washing process, before the drive unit undertakes to drive rotation of the drum and the agitating body on the basis of the double drive-shaft form (S110-S113), and there being water contained in the drum, the control portion causes the drive unit first to drive rotation of the drum and the agitating body on the basis of the single drive-shaft form (S105-S107).

Description

Drum washing machine

Technical field

The present invention relates to a drum type washing machine. The drum type washing machine may continuously carry out the process from washing to drying, or may perform only washing but not drying.

Background technique

Conventionally, a drum type washing machine rotates a horizontal axis drum in an outer tank in which water is stored at the bottom, and lifts the laundry up and down by a baffle provided in the drum to drop the laundry onto the inner circumferential surface of the drum. The laundry is washed therefrom (see Patent Document 1).

Thus, in the structure in which the laundry is stirred by the ribs, the laundry is hardly entangled with each other or rubbed against each other. Therefore, the drum type washing machine is less likely to have a smaller mechanical force acting on the laundry than the fully automatic washing machine that rotates the pulsator in the washing and dewatering tank to wash the laundry, and the detergency performance is liable to be lowered.

Therefore, in order to improve the detergency performance of the drum type washing machine, it is possible to adopt a configuration in which a stirring body is provided on the rear surface of the drum, and the drum and the agitating body are rotated at different rotational speeds during washing and rinsing.

Prior art literature

Patent literature

Patent Document 1: Japanese Laid-Open Patent Publication No. 2013-240577

Summary of the invention

Problems to be solved by the invention

When washing is carried out, the laundry is usually put into the drum in a dry state. In the case where a large amount of dry laundry is accommodated in the drum, there is a possibility that the laundry is compressed between the door in front of the drum and the agitating body behind the drum, and the agitating body is pressed by the laundry. Further, the friction coefficient becomes larger when the laundry is in a dry state than in a state of being wetted. Therefore, when the drum and the agitating body are each rotated in a state where the agitating body is pressed against the dried laundry, the agitating body receives a large load due to the laundry, and the driving motor that drives the agitating body is locked.

The present invention has been made in view of the above problems, and an object thereof is to provide a drum type washing machine capable of The improvement of the cleaning performance can prevent problems such as malfunction of the driving unit.

Solution to solve the problem

A main aspect of the present invention relates to a drum type washing machine that performs a washing operation including a washing process, a rinsing process, and a spin-drying process. The drum type washing machine of the present embodiment includes a washing step, a rinsing step, and a dehydrating step. A drum type washing machine according to the present invention includes an outer tank that is disposed in a casing, and a water supply unit that supplies water into the outer tank. The drum is disposed in the outer tank and can be inclined on a horizontal axis or in a horizontal direction. a tilting shaft is rotated centrally; a rotating body disposed at a rear portion of the drum and having a protrusion on the surface in contact with the laundry; and a driving portion capable of being in a two-axis driving form and a shaft driving form The drum and the rotating body are rotated, and the two-axis driving mode is a driving form in which the drum and the rotating body are respectively rotated so that the rotating speed of the rotating body is faster than the rotating speed of the rotating body The one-axis driving mode is a driving form in which the drum and the rotating body are integrally rotated such that a rotation speed of the rotating body becomes equal to a rotation speed of the drum; and a control unit controls The operation of the drive unit. Here, in the washing step, the control unit performs the rotation of the drum and the rotating body based on the two-axis driving form by the driving unit, and passes through the water supply unit. In the state where water is stored in the drum while the water is supplied, the drive unit performs rotation of the drum and the rotating body based on the one-axis drive mode.

According to the above configuration, the laundry can be wetted by the water in the drum, and the volume of the laundry and the friction coefficient can be reduced, and then the rotation of the drum and the rotating body based on the two-axis driving mode can be performed. Thereby, it is possible to prevent an excessive load generated by applying the laundry to the rotating body, and it is possible to prevent the driving unit from causing problems such as the motor being locked.

In the drum type washing machine of the present embodiment, the driving unit may have a configuration in which the driving form of the driving unit is switched between the two-axis driving mode and the one-axis driving mode. a clutch mechanism portion and a form detecting portion that detects the driving form. In this case, the control unit causes the clutch mechanism unit to operate such that the drive mode is switched to the one-axis drive mode when the washing operation is completed, and the drum and the Before the rotating body rotates in a state where water is stored in the drum, the form detecting unit detects the driving form, and when the driving form is in the two-axis driving mode, the clutch mechanism unit Switching from the two-axis drive mode to the drive mode of the one-axis drive mode is performed.

According to the configuration described above, before the rotation of the drum and the rotating body in the one-axis driving mode in the state in which the water is stored, the one-axis driving mode is performed as long as the switching to the one-axis driving mode is not completed. Switching. Thereby, it is possible to prevent the rotation of the drum and the rotating body based on the two-axis driving mode from being erroneously performed, and it is possible to further prevent a problem in the driving portion.

In the drum type washing machine of the present embodiment, a configuration may be employed in which a water level detecting unit that detects a water level in the outer tank can be used. In this case, after the rotation of the drum and the rotating body based on the one-axis driving mode, when the water level detected by the water level detecting unit reaches a predetermined water level, the control unit The drive unit starts the rotation of the drum and the rotating body based on the two-axis drive mode.

According to the above configuration, in the state where the laundry in the drum is sufficiently wetted, the rotation of the drum and the rotating body based on the two-axis driving mode can be performed, and the problem of the driving portion can be further prevented.

In the drum type washing machine of the present embodiment, the control unit starts the drive based on the one-axis driving mode after the drum is supplied with water until the drum is not passed by the water in the outer tank. The drum and the rotation of the rotating body.

According to the above configuration, it is possible to prevent the drum and the rotating body from rotating in a state where the laundry cannot come into contact with the water stored in the outer tub, and it is possible to prevent waste of electricity.

In the drum type washing machine of the present embodiment, the control unit may be configured such that, in the rinsing step, water is stored in the drum by the water supply from the water supply unit. The drive unit performs rotation of the drum and the rotating body based on the two-axis driving mode without performing rotation of the drum and the rotating body in the one-axis driving mode.

According to the above-described configuration, in the rinsing step in which the laundry is already wetted, the drum and the rotating body are rotated in the two-axis driving mode from the beginning without rotating the drum and the rotating body based on the one-axis driving mode. Therefore, further improvement in rinsing performance can be expected.

Effect of the invention

According to the present invention, it is possible to provide a drum type washing machine which can improve the cleaning performance and can prevent problems such as malfunction of the driving portion.

The effects and significance of the present invention will be further clarified by the description of the embodiments shown below. However, the following embodiments are merely illustrative of the embodiments of the present invention, and the present invention is not limited by the technical solutions described in the following embodiments.

DRAWINGS

FIG. 1 is a side cross-sectional view showing a configuration of a drum type washing machine according to an embodiment.

FIG. 2 is a cross-sectional view showing a configuration of a drive unit according to an embodiment.

3 is a cross-sectional view showing a configuration of a drive unit according to an embodiment.

4 is a front view of the rotor showing a configuration of a rotor of a drive motor according to the embodiment.

Fig. 5 is an enlarged perspective view showing a rear portion of a bearing unit formed by a rack according to an embodiment.

FIG. 6 is a view showing a configuration of a clutch body of a clutch mechanism portion according to the embodiment.

FIG. 7 is a block diagram showing a configuration of a drum type washing machine according to an embodiment.

FIG. 8 is a view showing a timing of switching the drive mode of the drive unit and a drive timing of the drive motor by the clutch mechanism unit in the washing operation according to the embodiment.

FIG. 9 is a flowchart showing a control process in the washing process according to the embodiment.

FIG. 10 is a flowchart showing a control process in the rinsing step according to the embodiment.

FIG. 11 is a flowchart showing a control process in a washing process according to a modification.

detailed description

Hereinafter, a drum type washing machine which does not have a drying function as one embodiment of the drum type washing machine of the present invention will be described with reference to the drawings.

FIG. 1 is a side cross-sectional view showing a configuration of a drum type washing machine 1.

The drum type washing machine 1 is provided with a casing 10 that constitutes an appearance. The front surface 10a of the casing 10 is inclined upward from the central portion, and an inlet 11 for washing is formed on the inclined surface. The inlet 11 is covered by a door 12 that is freely opened and closed.

In the casing 10, the outer tank 20 is elastically supported by a plurality of dampers 21. The drum 22 is rotatably disposed in the outer tub 20. The outer groove 20 and the rear surface side of the drum 22 are inclined so as to become lower with respect to the horizontal direction. Thereby, the drum 22 rotates centering on the inclination axis inclined with respect to the horizontal direction. The inclination angle of the outer tub 20 and the drum 22 is set to about 10 to 20 degrees. The opening 20a of the front surface of the outer tub 20 and the opening 22a of the front surface of the drum 22 face the input port 11, and are closed by the door 12 together with the input port 11. On the inner peripheral surface of the drum 22, a plurality of dewatering holes 22b are formed. Further, on the inner circumferential surface of the drum 22, three lifting ribs 23 are provided at substantially equal intervals in the circumferential direction.

The agitating body 24 is rotatably disposed at the rear of the drum 22 . The agitating body 24 has a substantially disk shape. On the surface of the agitating body 24, a plurality of blades 24a radially extending from the central portion are formed. The agitating body 24 rotates coaxially with the drum 22. The agitating body 24 corresponds to the rotating body of the present invention, and the vane 24a corresponds to the protruding portion of the present invention.

A drive unit 30 that generates torque for driving the drum 22 and the agitating body 24 is disposed behind the outer tub 20. The drive unit 30 corresponds to the drive unit of the present invention. In the washing step and the rinsing step, the driving unit 30 rotates the drum 22 and the stirring body 24 at different rotation speeds in the same direction. Specifically, the drive unit 30 rotates the drum 22 at a rotational speed at which the centrifugal force applied to the laundry in the drum 22 is less than the gravity, and rotates the agitating body 24 at a rotational speed faster than the rotational speed of the drum 22. On the other hand, in the spin-drying process, the drive unit 30 integrally rotates the drum 22 and the agitating body 24 with a centrifugal force that is applied to the laundry in the drum 22 much larger than the rotational speed of gravity. The detailed structure of the drive unit 30 will be described later.

A drain port portion 20b is formed at the bottom of the outer tub 20. A drain valve 40 is provided in the drain port portion 20b. The drain valve 40 is connected to the drain hose 41. When the drain valve 40 is opened, the water stored in the outer tank 20 is discharged to the outside through the drain hose 41.

A detergent box 50 is disposed in the front upper portion of the casing 10. The detergent container 50a containing the detergent is accommodated in the detergent box 50 so as to be freely extracted from the front. The detergent box 50 is connected to the water supply valve 51 disposed at the rear upper portion in the casing 10 through the water supply hose 52. Further, the detergent box 50 is connected to the upper portion of the outer tub 20 through a water injection pipe 53. When the water supply valve 51 is opened, tap water from the faucet is supplied into the outer tank 20 through the water supply hose 52, the detergent box 50, and the water injection pipe 53. At this time, the detergent contained in the detergent container 50a is supplied into the outer tub 20 along the water flow. The water supply valve 51 corresponds to the water supply unit of the present invention.

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. 2 shows a state in which the driving form of the driving unit 30 is switched to the two-axis driving mode, and FIG. 3 shows a state in which the driving form of the driving unit 30 is switched to the one-axis driving mode. FIG. 4 is a front view showing the rotor 110 of the structure of the rotor 110 of the drive motor 100. FIG. 5 is an enlarged perspective view of the rear portion of the bearing unit 500 in which the rack 514 is formed. 6(a) to 6(c) are views showing a configuration of a clutch body 610 of the clutch mechanism portion 600, which are respectively a front view, a right side view, and a rear view of the clutch body 610.

The drive unit 30 includes a drive motor 100, a wing shaft 200, a drum shaft 300, a planetary gear mechanism 400, a bearing unit 500, and a clutch mechanism portion 600. The drive motor 100 generates torque for driving the agitating body 24 and the drum 22. The wing shaft 200 is rotated by the torque of the drive motor 100, and the rotation is transmitted to the agitating body 24. The planetary gear mechanism 400 decelerates the rotation of the wing shaft 200, that is, the rotation of the rotor 110 of the drive motor 100, and transmits it to the drum shaft 300. The drum shaft 300 rotates coaxially with the wing shaft 200 at a rotational speed decelerated by the planetary gear mechanism 400, and transmits the rotation to the drum 22. Bearing unit The 500 supports the wing shaft 200 and the drum shaft 300 in a freely rotatable manner. The clutch mechanism unit 600 switches the driving form of the driving unit 30 between the two-axis driving mode in which the agitating body 24, that is, the wing shaft 200, and the rotational speed of the driving motor 100 are switched. The rotation speed is rotated at an equal speed, and the drum shaft 230, that is, the drum shaft 300, is rotated at a rotation speed decelerated by the planetary gear mechanism 40. The one-shaft drive mode is such that the agitating body 24 and the drum 22, that is, the wing shaft 200. The drum shaft 300 and the planetary gear mechanism 400 are integrally rotated at a rotation speed equal to that of the drive motor 100.

The drive motor 100 is an outer rotor type DC brushless motor including a rotor 110 and a stator 120. The rotor 110 is formed in a bottomed cylindrical shape, and permanent magnets 111 are arranged on the inner circumferential surface thereof over the entire circumference. As shown in FIG. 4, a circular boss portion 112 is formed at a central portion of the rotor 110. A boss hole 113 for fixing the wing shaft 200 is formed in the boss portion 112, and an annular engaged recess 114 is formed on the outer circumference of the boss hole 113. The outer peripheral portion of the engaged recessed portion 114 has the uneven portion 114a over the entire circumference. The engaged recess 114 corresponds to the first engaged portion of the present invention.

The stator 120 has a coil 121 at the outer peripheral portion. When a drive current is supplied to the coil 121 of the stator 120 from a motor drive unit to be described later, the rotor 110 rotates.

The drum shaft 300 has a hollow shape and encloses the wing shaft 200 and the planetary gear mechanism 400. The center portion of the drum shaft 300 is bulged outward, and the bulged portion constitutes a housing portion of the planetary gear mechanism 400.

The planetary gear mechanism 400 includes a sun gear 410, an annular internal gear 420 surrounding the sun gear 410, a plurality of sets of planetary gears 430 interposed between the sun gear 410 and the internal gear 420, and a planet that rotatably holds the planetary gears 430 Carrier 440.

The sun gear 410 is fixed to the wing shaft 200, and the internal gear 420 is fixed to the drum shaft 300. A set of planet gears 430 includes a first gear and a second gear that mesh with each other and rotate in opposite directions. The planet carrier 440 includes a carrier shaft 441 that extends rearward. The carrier shaft 441 is coaxial with the drum shaft 300, and is internally hollow to allow the wing shaft 200 to be inserted.

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

In the bearing unit 500, a cylindrical bearing portion 510 is provided at the center portion. Inside the bearing portion 510,

rollers

511 and 512 are provided at the front and rear portions, and a mechanical seal 513 is provided at the front end portion. The outer peripheral surface of the drum shaft 300 is supported by the

rollers

511, 512 and smoothly rotates in the bearing portion 510. In addition, intrusion of water between the bearing portion 510 and the drum shaft 300 is prevented by the mechanical seal 513. As shown in Figure 5 A rack 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 fixing flange portion 520 is formed around the bearing portion 510. A mounting boss 521 is formed at a lower end portion of the fixing flange portion 520.

The bearing unit 500 is fixed to the rear surface of the outer tub 20 by a fixing method such as screw fastening by means of the fixing flange portion 520. In a state where the drive unit 30 has been mounted in the outer tub 20, the wing shaft 200 and the drum shaft 300 project into the inside of the outer tub 20. The drum 22 is fixed to the drum shaft 300, and the agitating body 24 is fixed to the wing shaft 200.

The clutch mechanism unit 600 includes a clutch body 610, a clutch spring 620, a clutch lever 630, a lever support portion 640, a clutch drive device 650, a joint bar 660, and a mounting plate 670.

As shown in FIGS. 6(a) to 6(c), the clutch body 610 has a substantially disk shape. An annular rack 611 is formed on the outer peripheral surface of the front end portion of the clutch body 610. The rack 611 is formed to be engaged with the rack 514 of the bearing unit 500. Further, a flange portion 612 is formed on the outer circumferential surface of the clutch body 610 behind the rack 611. Further, in the clutch body 610, an annular engagement flange portion 613 is formed at the rear end portion. The engagement flange portion 613 has the same shape as the engaged concave portion 114 of the rotor 110, and has an uneven portion 613a over the entire circumference of the outer peripheral portion. When the engagement flange portion 613 is inserted into the engaged recessed portion 114, the

uneven portions

613a, 114a are engaged with each other.

The carrier shaft 441 is inserted into the shaft hole 614 of the clutch body 610. The rack 614a formed on the inner peripheral surface of the shaft hole 614 is engaged with the rack 441a formed on the outer peripheral surface of the carrier shaft 441. Thereby, the clutch body 610 is in a state in which the movement in the front-rear direction is permitted with respect to the carrier shaft 441 and the rotation in the circumferential direction is restricted.

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

A pressing portion 631 that comes into contact with the rear surface of the flange portion 612 of the clutch body 610 and pushes the flange portion 612 forward is formed at the upper end portion of the clutch lever 630.

The clutch lever 630 has a support shaft 632, and the support shaft 632 is rotatably supported by the lever support portion 640. The spring 641 is sandwiched between the clutch lever 630 and the lever support portion 640. The spring 641 is a tension spring, and the clutch lever 630 is biased toward the front by the elastic force of the spring 641.

The clutch driving device 650 includes a torque motor 651 and a disk-shaped cam 652 that rotates around the horizontal axis using the torque of the torque motor 651. The upper surface of the cam 652 is in contact with the lower end portion of the clutch lever 630. The upper surface of the cam 652 includes a first contact surface 652a having a higher height disposed on one end side, a second contact surface 652b having a lower height disposed on the other end side, and connecting the first contact surface 652a and the second contact surface 652b. An inclined surface 652c between.

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

In the case where the driving form of the driving unit 30 is switched from the one-axis driving mode to the two-axis driving mode, as shown in FIG. 2, the cam 652 passes through the torque motor 651 such that the first contact surface 652a is located above and the second contact surface 652b The way it is below rotates. As the cam 652 rotates, the lower end portion of the clutch lever 630 is sequentially pressed by the inclined surface 652c and the first contact surface 652a to move rearward. The clutch lever 630 is rotated 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 rack 611 of the clutch body 610 and the rack 514 of the bearing unit 500 are engaged.

When the rack 611 and the rack 514 are engaged, since the rotation of the clutch body 610 with respect to the bearing unit 500 in the circumferential direction is restricted and becomes a non-rotatable state, the carrier shaft 441 of the planetary gear mechanism 400, that is, the planetary carrier 440 is fixed in a state in which it cannot be rotated. In such a state, when the rotor 110 rotates, the wing shaft 200 rotates at a rotational speed equal to the rotational speed of the rotor 110, and the agitating body 24 coupled to the wing shaft 200 also rotates at the same speed as the rotational speed of the rotor 110. The speed is rotated. As the wing shaft 200 rotates, the sun gear 410 rotates in the planetary gear mechanism 400. As described above, since the carrier 440 is in a fixed state, the first gear and the second gear of the planetary gear 430 rotate in the same direction and in the opposite direction to the sun gear 410, respectively, and the internal gear 420 rotates in the same direction as the sun gear 410. . Thereby, the drum shaft 300 fixed to the inner gear 420 is in the same direction as the wing shaft 200, and is rotated at a rotation speed slower than the wing shaft 200, and the drum 22 fixed to the drum shaft 300 is more than the agitating body 24 The slow rotation speed is rotated in the same direction as the agitating body 24. In other words, the agitating body 24 rotates in the same direction as the drum 22 at a rotational speed faster than the drum 22.

On the other hand, in the case where the form of the drive unit 30 is switched from the two-axis drive mode to the one-shaft drive mode, as shown in FIG. 3, the cam 652 passes through the torque motor 651 such that the second contact surface 652b is located above and first. The contact surface 652a is rotated in a manner of being located below. As the cam 652 rotates, the lower end portion of the clutch lever 630 sequentially 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 rearward 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 rearward by the elastic force of the clutch spring 620 Moving, the engagement flange portion 613 of the clutch body 610 is engaged with the engaged recessed portion 114 of the rotor 110.

When the engagement flange portion 613 and the engaged recess portion 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 is in a state of being rotatable together with the rotor 110. In such a state, when the rotor 110 rotates, the wing 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 carrier 440 rotate at a rotation speed equal to that of the rotor 110. Thereby, the internal gear 420 rotates at a rotation speed equal to that of the sun gear 410 and the carrier 440, and the drum shaft 300 fixed to the internal gear 420 rotates at a rotation speed equal to that of the rotor 110. That is, in the drive unit 30, the wing shaft 200, the planetary gear mechanism 400, and the drum shaft 300 are integrally rotated. Thereby, the drum 22 and the agitating body 24 rotate integrally.

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

In addition to the above configuration, the drum type washing machine 1 further includes a control unit 701, a storage unit 702, an operation unit 703, a water level sensor 704, a motor drive unit 705, a water supply drive unit 706, a drain drive unit 707, a clutch drive unit 708, and Door lock device 709.

The operation unit 703 includes a power button 703a, a start button 703b, and a mode selection button 703c. The power button 703a is a button for turning on and off the power of the drum type washing machine 1. The start button 703b is a button for starting the operation. The mode selection button 703c is a button for selecting an arbitrary operation mode from among a plurality of operation modes of the washing operation. The operation unit 703 outputs an input signal corresponding to the button operated by the user to the control unit 701.

The water level sensor 704 detects the water level in the outer tank 20, and outputs a water level detection signal corresponding to the detected water level to the control unit 701. The water level sensor 704 corresponds to the water level detecting unit of the present invention.

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 driving unit 706 supplies a drive current to the water supply valve 51 based on a control signal from the control unit 701. The drain drive unit 707 supplies a drive current to the drain valve 40 based on a control signal from the control unit 701.

The clutch drive 650 includes a first detection sensor 653 and a second detection sensor 654. The first detecting sensor 653 and the second detecting sensor 654 correspond to the form detecting unit of the present invention. The first detecting sensor 653 detects that the driving form of the driving unit 30 is switched to the two-axis driving mode, and outputs a detection signal to the control unit 701. The second detecting sensor 654 detects that the driving form of the driving unit 30 is switched to the one-axis driving mode, and outputs a detection signal to the control unit 701. The clutch drive unit 708 is based on The drive current is supplied from the first detection sensor 653 and the second detection sensor 654 to the torque motor 651 based on the control signal output from the control unit 701.

The door lock device 709 performs locking and unlocking of the door 12 in accordance with a control signal from the control unit 701.

The storage unit 702 includes an EEPROM, a RAM, and the like. A program for executing a washing operation of various washing operation modes is stored in the storage unit 702. Further, various parameters and various control flags for execution of these programs are stored in the storage unit 702.

The control unit 701 controls the motor drive unit 705, the water supply drive unit 706, the drain drive unit 707, the clutch drive unit 708, and the door lock device based on the programs stored in the storage unit 702 based on the respective signals from the operation unit 703, the water level sensor 704, and the like. 709 and so on.

The drum type washing machine 1 performs a washing operation in various operation modes in accordance with a user's selection operation by the mode selection button 703c. In the washing operation, the washing step, the intermediate dehydration step, the rinsing step, and the final dehydration step are sequentially performed. Further, depending on the operation mode, the intermediate dehydration process and the rinsing process are sometimes performed twice or more.

FIG. 8 is a view showing a switching timing of the driving form of the driving unit 30 and a driving timing of the driving motor 100 by the clutch mechanism unit 600 in the washing operation.

The drive mode of the drive unit 30 is switched to the one-axis drive mode in accordance with the switching of the drive mode before the final spin-drying process in the previous washing operation before the start of the washing operation. After the start of the washing operation, the driving mode is maintained in the one-axis driving mode until the end of the water supply process. The drive motor 100 starts to operate from the water supply, and the drum 22 and the agitating body 24 integrally rotate. The rotational speed of the drum 22 and the agitating body 24 at this time is a rotational speed at which the centrifugal force acting on the laundry in the drum 22 is smaller than the gravity. The drive motor 100 alternately performs right rotation and left rotation, and the drum 22 and the agitating body 24 alternately perform right rotation and left rotation. The laundry in the drum 22 is stirred by the lifting ribs 23 to come into contact with the water stored in the drum 22. Since the laundry is wetted, the volume of the laundry within the drum 22 is reduced, and the friction of the laundry is reduced.

After the water supply process is completed, the drive mode is switched from the one-axis drive mode to the two-axis drive mode. The drive motor 100 stops operating after the time required for switching. After the switching is completed, the washing process is started, and the drive motor 100 is operated again. The drum 22 and the agitating body 24 are each rotated in the same direction. At this time, the drum 22 is alternately rotated about the rotation speed of the drum 22 at the same rotation speed as that in the one-shaft driving mode. The laundry in the drum 22 is lifted up by the lifting ribs 23 and falls onto the inner circumferential surface of the drum 22. In addition to this, at the rear of the drum 22, the washing and the stirring of the rotation The blade 24a of the body 24 is in contact with the laundry, and the laundry is agitated by the blade 24a or agitated by the blade 24a. Thereby, the laundry is washed. The mechanical force applied to the laundry is washed more than by the ribs 23, and the movement in the drum 22 of the laundry becomes active, so that the cleaning performance can be expected to be improved.

When the rotation of the drum 22 and the agitating body 24 in the two-axis driving mode is started, since the volume of the laundry and the friction coefficient are reduced, when the agitating body 24 comes into contact with the laundry, the load on the agitating body 24 is not excessively applied. . Therefore, the locking of the drive motor 100 is prevented.

When the washing process ends, the drive motor 100 stops operating. The driving mode continues to maintain the two-axis driving mode, and the drainage process is performed. When the drainage process is completed, the drive mode is switched from the two-axis drive mode to the one-shaft drive mode. When the switching is completed, the process shifts to the intermediate dehydration process. Further, the switching from the two-axis driving mode to the one-axis driving mode may be performed before the draining process.

In the intermediate spin-drying process, when the drive motor 100 is operated, the drum 22 and the agitating body 24 rotate integrally with the centrifugal force of the laundry acting in the drum 22 much more than the gravity. Due to the centrifugal force, the laundry is pressed onto the inner peripheral surface of the drum 22 to be dehydrated.

When the intermediate dehydration process is completed, the rinsing process is followed. Before the water supply step in the rinsing step, the driving form is switched from the one-axis driving mode to the two-axis driving mode. The drive motor 100 that has temporarily stopped the dehydration is operated again after the start of the switching, while the water supply is started. In the water supply process and the rinsing process, the drum 22 and the agitating body 24 perform right rotation and left rotation in the same manner as in the washing process.

Like the washing process, the laundry in the drum 22 is agitated by the lifting rib 23 and falls onto the inner peripheral surface of the drum 22, and the laundry or the blade 24a of the agitated body 24 is raked or agitated by the blade 24a. The laundry is thus rinsed.

Since the mechanical force applied to the laundry is increased, and the movement of the laundry in the drum 22 is active, an improvement in the rinsing performance can be expected. In particular, in the rinsing step, since the laundry is dehydrated by the intermediate dehydration step, it is still in a wet state, so that the drive motor 100 is less likely to be locked. Therefore, in the rinsing step, the drum 22 and the agitating body 24 are rotated in the two-axis driving mode from the water supply step without performing the rotation of the drum 22 and the agitating body 24 in the one-axis driving mode. Therefore, it is expected that the rinsing performance is further improved.

When the rinsing process ends, the drive motor 100 stops operating. The driving pattern continues to maintain the two-axis driving pattern, and the drainage process is performed. When the drainage process is completed, the drive mode is switched from the two-axis drive mode to the one-shaft drive mode. Switch to the final dewatering process when the switch is over. Further, the switching from the two-axis driving mode to the one-axis driving mode may be performed before the draining process.

In the final dehydration step, similarly to the intermediate dehydration step, the drum 22 and the agitating body 24 are integrally rotated at a high speed, whereby the laundry is dehydrated. Further, in the final dehydration step, the dehydration time is longer than the intermediate dehydration step, and the rotation speed of the drum 22 and the agitating body 24 is faster.

When the final dewatering process is completed, the washing operation is completed.

Next, the control process by the control unit 701 in the washing process and the rinsing process will be described in detail with reference to FIGS. 9 and 10 .

FIG. 9 is a flowchart showing a control process in the washing process.

When the washing process is started, the control unit 701 determines whether or not the driving form of the driving unit 30 is the one-axis driving mode based on the detection result of the second detecting sensor 654 (S101). Since the switching to the one-axis driving mode is normally performed in the final dehydration step in the last washing operation, the one-axis driving mode is maintained at the start of this washing operation. Therefore, when the control unit 701 determines that the driving mode is the one-axis driving mode (S101: YES), the water supply valve 51 is opened (S102). Thereby, the water supply to the outer tank 20 is started, and the detergent-containing water is supplied to the outer tank 20.

On the other hand, when the drive mode is not switched to the one-axis drive mode due to some problem (S101: NO), the control unit 701 operates the torque motor 651 of the clutch mechanism unit 600 to switch the drive mode to one. Shaft drive mode (S103). When it is confirmed that the switching to the one-axis driving mode is made based on the detection result of the second detecting sensor 654, the control unit 701 opens the water supply valve 51 (S102).

Next, the control unit 701 determines whether or not the water level in the outer tub 20 has reached the stirring water level based on the detection result of the water level sensor 704 (S104). The agitating water level is a predetermined water level which is a water level at which the drum 22 and the agitating body 24 start to rotate, and is a water level in which the circumferential surface of the drum 22 is not in the water, and is set to be lower than a washing water level to be described later.

When the water level in the outer tank 20 reaches the agitation water level (S104: YES), the control unit 701 causes the drive motor 100 to operate (S105). The drum 22 and the agitating body 24 integrally rotate at a low speed, and the laundry in the drum 22 comes into contact with the stored water and is stirred, soaked by water.

When the predetermined water supply time has elapsed (S106: YES), the control unit 701 stops the drive motor 100 and closes the water supply valve 51 (S107). The control unit 701 determines whether or not the water level in the outer tub 20 has reached the predetermined washing water level based on the detection result of the water level sensor 704 (S108). In the case where the volume of the laundry is large and a large amount of water is absorbed by the laundry, it is difficult to reach the washing water level in one water supply time. As long as the water level in the outer tank 20 does not reach the washing water level (S108: NO), the control unit 701 opens the water supply valve 51 again (S109) to operate the drive motor 100 (S105). Thus, step S105 is repeated to The treatment of S109 until the water level in the outer tank 20 reaches the washing water level. When the water level in the outer tank 20 reaches the washing water level, the laundry in the drum 22 is sufficiently fully wetted.

When the water level in the outer tank 20 reaches the washing water level (S108: YES), the control unit 701 operates the torque motor 651 to switch the driving form of the driving unit 30 to the two-axis driving mode (S110). When it is confirmed that the mode is switched to the two-axis driving mode based on the detection result of the first detecting sensor 653, the control unit 701 causes the driving motor 100 to operate (S111). The drum 22 and the agitating body 24 are respectively rotated at a low speed of the drum 22, and the agitating body 24 is rotated at a higher speed than the drum 22, and the laundry in the drum 22 is washed by the action of high mechanical force and detergent.

When the predetermined washing time has elapsed (S112: YES), the control unit 701 stops the drive motor 100 (S113). Then, the control unit 701 opens the drain valve 40 (S114). The water in the outer tank 20 is discharged to the outside of the washing machine.

The control unit 701 determines whether or not the drainage has been completed (S115). The control unit 701 determines that the draining is completed when the water level in the outer tank 20 reaches a lower limit water level detectable by the water level sensor 704, for example, and then a predetermined time has elapsed. When the control unit 701 determines that the draining is completed (S115: YES), the drain valve 40 is closed (S116). Then, the control unit 701 operates the torque motor 651 to switch the drive mode of the drive unit 30 to the one-axis drive mode (S117). In this way, the control process of the washing process is completed.

Fig. 10 is a flowchart showing a control process in the rinsing step.

When the rinsing process is started, the control unit 701 operates the torque motor 651 to switch the drive mode of the drive unit 30 to the two-axis drive mode (S201). When it is confirmed that the switching to the two-axis driving mode is made based on the detection result of the first detecting sensor 653, the control unit 701 opens the water supply valve 51 and operates the driving motor 100 (S202). The water supply is performed in the outer tank 20, and the drum 22 and the agitating body 24 are respectively rotated at a low speed of the drum 22, and the agitating body 24 is rotated at a higher speed than the drum 22, and the laundry in the drum 22 is rinsed by a high mechanical force.

When the predetermined water supply time has elapsed (S203: YES), the control unit 701 stops the drive motor 100 and closes the water supply valve 51 (S204). The control unit 701 determines whether or not the water level in the outer tub 20 has reached a predetermined water level based on the detection result of the water level sensor 704 (S205). As long as the water level in the outer tank 20 does not reach the washing water level (S108: NO), the control unit 701 opens the water supply valve 51 again and operates the drive motor 100 (S202). In this manner, the processing of step S202 or S205 is repeated until the water level in the outer tank 20 reaches the rinsing water level.

When the water level in the outer tank 20 reaches the rinsing water level (S205: YES), the control unit 701 causes the driving motor 100 work (S206). The washing is continued while the feed water is stopped.

When the predetermined washing time has elapsed (S207: YES), the control unit 701 stops the drive motor 100 (S208). Then, the control unit 701 opens the drain valve 40 (S209). The water in the outer tank 20 is discharged to the outside of the washing machine.

When the draining is completed (S210: YES), the control unit 701 closes the drain valve 40 (S211). Then, the control unit 701 operates the torque motor 651 to switch the drive mode of the drive unit 30 to the one-axis drive mode (S212). In this way, the control process of the rinsing process ends.

As described above, according to the present embodiment, in the washing step and the rinsing step, the drum 22 and the agitating body 24 are rotated such that the rotational speed of the agitating body 24 is faster than the rotational speed of the drum 22 . Thereby, the laundry in the drum 22 is not only dropped onto the inner circumferential surface of the drum 22 by the agitation by the lifting ribs 23, but also by the blades 24a of the rotating agitating body 24. Therefore, the cleaning performance and the rinsing performance can be improved as compared with the structure in which the laundry is only stirred by the lifting ribs 23.

Further, according to the present embodiment, the drum 22 and the agitating body 24 are integrally rotated in a one-axis driving mode while the water is stored in the drum 22, and the water in the washing drum 22 is wetted to make the volume of the laundry. After the friction coefficient is reduced, the drum 22 and the agitating body 24 are each rotated in a two-axis driving mode. Thereby, an excessive load generated by applying the laundry to the agitating body 24 can be prevented, and the drive motor 100 can be prevented from being locked. Further, it is possible to prevent damage to the laundry due to strong friction with the agitating body 24.

Further, according to the present embodiment, before the rotation of the drum 22 and the agitating body 24 in the one-axis driving mode in the state in which the water is stored, it is detected whether or not the switching to the one-axis driving mode is completed, and if the switching is not completed, Switching to the one-axis drive mode is performed. Thereby, it is possible to prevent the rotation of the drum 22 and the agitating body 24 based on the two-axis driving mode from being erroneously performed, and it is possible to further prevent the driving motor 100 from being blocked.

Further, according to the present embodiment, since the rotation of the drum 22 and the agitating body 24 in the one-axis driving mode is performed until the water level in the outer tub 20 reaches the washing water level, the laundry in the drum 22 can be sufficiently wetted. Then, the rotation of the drum 22 and the agitating body 24 based on the two-axis driving mode is performed, and the drive motor 100 can be further prevented from being locked.

Further, according to the present embodiment, since the water level in the outer tank 20 reaches the agitated water and the water does not pass through the drum 22, the rotation of the drum 22 and the agitating body 24 based on the temporary driving mode is performed, so that the laundry cannot be prevented from contacting the outer tank. The rotation of the drum 22 and the agitating body 24 is performed in the state of 20 stored water, and waste of electricity can be prevented.

Further, according to the present embodiment, in the rinsing step in which the motor 100 is in a wet state due to the fact that the laundry is already in a wet state, the rotation of the drum 22 and the agitating body 24 based on the one-axis driving mode is not performed, but the water supply process is performed. Since the drum 22 and the agitating body 24 are rotated in accordance with the two-axis driving mode, further improvement in the rinsing performance can be expected.

The embodiments of the present invention have been described above, but the present invention is not limited to the above-described embodiments and the like, and various modifications other than the above may be made in the embodiments of the present invention.

For example, in the above-described embodiment, the water injection port of the water injection pipe 53 may directly protrude into the drum 22, and the laundry may be sprayed into the water from the water injection port toward the laundry in the drum 22. In this case, even if the drum 22 is not wetted by the water in the outer tub 20, the laundry can be wetted. Therefore, in the control processing shown in Fig. 11, the processing of the step S104 of detecting the stirring water level is deleted, like As in the control process shown in Fig. 11, when the water supply valve 51 is opened, the drive motor 100 operates immediately.

Further, in the above embodiment, after the water level in the outer tank 20 reaches the washing water level, the rotation of the drum 22 and the agitating body 24 based on the two-axis driving mode is started. However, the configuration is not limited thereto, and the rotation of the drum 22 and the agitating body 24 based on the two-axis driving mode may be started after the first water supply time has elapsed.

Further, in the above embodiment, after the washing time and the rinsing time have elapsed, the drive motor 100 is stopped. However, it is also possible to adopt a configuration in which the driving of the motor 100 is stopped after the draining process.

Further, in the above-described embodiment, in the rinsing step, the rotation of the drum 22 and the agitating body 24 based on the two-axis driving mode is started simultaneously with the water supply step. However, it is also possible to adopt a configuration in which the rotation of the drum 22 and the agitating body 24 based on the two-axis driving mode is started from the middle of the water supply step or after the water level in the outer tank 20 reaches the rinsing water level and is switched to the rinsing step.

Further, in the above embodiment, the drum 22 is rotated about the tilt axis that is inclined with respect to the horizontal direction. However, the drum type washing machine 1 may be configured to rotate the drum 22 around the horizontal axis.

Further, 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 and drying machine which is a drum type washing machine having a drying function.

Further, the embodiments of the present invention are variously modified as appropriate within the scope of the technical idea described in the claims.

Description of the reference numerals

10: housing; 20: outer groove; 22: roller; 24: agitating body (rotating body); 24a: blade (projection); 30: drive unit (drive unit); 51: water supply valve (water supply); 600: clutch mechanism unit; 653: first detecting sensor (morphological detecting unit); 654: second detecting sensor (morphological detecting unit); 701: control unit; 704: water level sensor (water level detecting unit).

Claims

A drum type washing machine that performs a washing operation including a washing step, a rinsing step, and a dehydrating step, and is characterized by comprising:

The outer slot is disposed in the housing;

Supplying water to the outer tank;

a drum disposed in the outer groove and rotatable about a horizontal axis or an inclined axis inclined with respect to a horizontal direction;

a rotating body disposed at a rear portion of the drum and having a protrusion on the surface in contact with the laundry;

The driving unit is configured to rotate the drum and the rotating body in a two-axis driving form such that a rotation speed of the rotating body becomes a rotation speed of the drum a driving mode in which the drum and the rotating body are respectively rotated in a fast manner, wherein the one-axis driving mode is such that the rotating speed of the rotating body becomes equal to the rotating speed of the drum a driving form that rotates integrally with the rotating body;

a control unit that controls an operation of the drive unit,

In the washing step, the control unit performs the rotation of the drum and the rotating body based on the two-axis driving mode by the driving unit, and is passed through the water supply from the water supply unit. In a state where water is stored in the drum, the drive unit performs rotation of the drum and the rotating body based on the one-axis drive mode.
A drum type washing machine according to claim 1, wherein

Further, the drive unit further includes a clutch mechanism unit that switches a driving form of the driving unit between the two-axis driving mode and the one-axis driving mode, and a form detecting unit that detects the driving form.

The control unit

The clutch mechanism unit is operated such that the drive mode is switched to the one-axis drive mode when the washing operation is completed, and

Before the rotation of the drum and the rotating body in the state in which the water is stored in the drum, the shape detecting unit detects the driving form, and when the driving form is in the two-axis driving mode, The clutch mechanism unit switches between the two-axis drive mode and the drive mode of the one-axis drive mode.
A drum type washing machine according to claim 1 or 2, characterized in that

There is also a water level detecting portion that detects a water level in the outer tank,

The control unit starts the operation based on the driving unit when the water level detected by the water level detecting unit reaches a predetermined water level after the rotation of the drum and the rotating body in the one-axis driving mode is started. The drum of the two-axis drive mode and the rotation of the rotating body are described.
The drum type washing machine according to any one of claims 1 to 3, characterized in that

The control unit starts the drum and the rotating body based on the one-axis driving form by the driving unit after the drum is supplied with water until the drum is not passed by the water in the outer tank. The rotation.
The drum type washing machine according to any one of claims 1 to 4, characterized in that

In the rinsing step, the control unit does not perform the above-described one-axis driving mode in a state where water is stored in the drum by the water supply from the water supply unit. The drum and the rotation of the rotating body are rotated by the drum and the rotating body based on the two-axis driving mode.