JP2008194257A - Drum type washing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To remove creases by sufficiently untangling entanglement and twist firmly formed on laundry after a spin-dry process. <P>SOLUTION: This drum type washing machine is provided with a rotary drum 4 formed into a bottomed cylindrical shape and installed in a water tub 2 so that a rotary shaft is directed in a horizontal direction or directed downward from the horizontal direction from the opened front face side to a back face side, or a bottom part, and has a normal/reversed-arc rotation driving mode alternatively repeating a sudden normal-arc rotation and a sudden reversed-arc rotation of the rotary drum 4 within a range of exceeding 90° and less than 200°. After the spin-dry step, this machine executes the normal/reversed-arc rotation driving mode so as to attain the purpose. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  In the present invention, a rotating drum formed in a bottomed cylindrical shape is installed in a water tank so that the direction of the rotation axis is horizontal or inclined downward from the horizontal direction from the front side to the open side to the back side as the bottom. The present invention relates to a drum type washing machine for washing laundry stored in a rotating drum by rotationally driving the rotating drum.

  Referring to FIG. 1 showing an embodiment of the present invention, such a drum type washing machine has a rotating drum 4 in which a number of holes 3 are formed in a water tank 2 supported by a suspension structure in a housing 1. The rotary drum 4 is rotationally driven by a motor 5 and opens a door 6 that can be opened and closed on the front side of the housing 1 to pass through the front opening of the water tank 2 and the front opening of the rotary drum 4. The laundry can be taken in and out of the rotary drum 4.

  In the conventional normal washing mode, when the door 6 is opened and the laundry is put into the rotating drum 4 and the operation is started with the introduction of the detergent, the water tank 2 is supplied with water from the water supply system 7 and supplied. A required amount of water is also supplied into the rotary drum 4 through the holes 3. When the rotary drum 4 is rotated by the motor 5 at a rotational speed of, for example, about 50 rpm, the laundry stored in the rotary drum 4 is hooked on the stirring protrusion 8 provided on the inner peripheral surface of the rotary drum 4 and rotated. When the laundry is lifted in the direction and dropped from an appropriate height, the laundry is washed by applying the action of tapping. After this washing process, the dirty washing water is drained by the drainage system 11, and the rinsing process is performed using the newly supplied water. When the rinsing process is completed, the rotating drum 4 is rotated at a high speed of about 1000 rpm, for example. A dehydration step is performed. These steps are automatically executed based on a predetermined control procedure. In addition, as shown in FIG. 1, the air in the water tank 2 and the rotating drum 4 is sucked by the blower 12 and dehumidification and heating are sequentially performed, and the air is repeatedly blown into the water tank 2 and the rotating drum 4 as dry high temperature air. In a drum type washing machine called a drum type washing and drying machine equipped with the system 13, a drying process is automatically executed after the dehydration process.

By the way, the laundry may be entangled or stuck as shown in FIG. 9 (a) by continuous rotation of the washing process and the rinsing process, particularly by continuous rotation of the rotating drum at the high speed in the dehydration process. It has already been a technical problem (see, for example, Patent Document 1). Patent Document 1 utilizes the improvement in the degree of freedom of rotation control by direct coupling drive by a motor of the rotating drum, and the rotating drum is moved to a minute degree of 90 degrees or less after the dehydration process. Within the rotation angle, the laundry stuck in the rotating drum is peeled off or rotated as shown in FIG. 9 (b) by rotating forward and backward multiple times, particularly at a minute rotation angle of 10 degrees or more and less than 30 degrees. Disclosure of technology that can unravel the laundry that has been hardened at the top of the drum, eliminate imbalance during dehydration, and improve the ease of taking out laundry after drying Yes.
JP 2000-254385 A

  However, forward and reverse alternating minute angular rotation performed by the technique described in Patent Document 1 after the dehydration step is performed at a speed of about 55 rpm at which the laundry as disclosed in the examples can be sufficiently adhered to the inner surface of the rotating drum. However, it is only necessary to rotate forward and backward a plurality of times within a minute rotation angle of 90 degrees or less, particularly at a minute rotation angle of 10 degrees or more and less than 30 degrees. Since it cannot be performed at a constant speed, only the area below the small angle in the middle is the predetermined speed, and before and after that, the speed increases toward the predetermined speed or decelerates from the predetermined speed, so the laundry is lifted only to a position below the small angle. I can't. As a result, even if there is a sudden deceleration due to braking at the end of the small angle rotation and the forced peeling force from the inner surface of the rotating drum is applied due to the inertia of the laundry, the laundry is in a direction against gravity because it is in a direction against gravity. The tendency to slide down rather than peel away in the direction away from the inner surface of the rotating drum becomes stronger. Accordingly, the laundry that slides down is moved in the sliding-down direction by the next minute rotation of the rotating drum in the opposite direction. This is repeated thereafter, but the laundry is swung to the left and right with the sliding-down on the end side by forward / reverse rotation of the rotating drum at a small angle, and the position of the laundry is not changed so much. Even if the sticking to the inner surface of the rotating drum can be eliminated, the dehydration process is performed. The tangling, twisting, and twisting effects in the washing process and the rinsing process are not sufficient for solving the entanglement and twisting of the laundry that is strongly pressed against the inner surface of the rotating drum in a state of twisting and sticking. For this reason, it is difficult to take out the laundry because the effect of untangling and twisting is insufficient, and it is troublesome because post-processing is required to unwind and spread it. In particular, it takes time and effort to stretch twisted wrinkles and wrinkles after drying.

  An object of the present invention is to provide a drum-type washing machine that can sufficiently eliminate wrinkles and twists of the laundry after the dehydration step and reduce wrinkles and obtain a high finished state.

  In order to achieve the above object, a drum-type washing machine according to the present invention is configured such that a rotating drum formed in a bottomed cylindrical shape has a horizontal or horizontal rotation axis direction from an opening front side toward a back side as a bottom. It is installed in the water tank so as to be inclined downward, and is equipped with a forward / reverse arc rotation drive mode in which a sudden forward arc rotation and a sudden reverse arc rotation of 90 to less than 200 degrees of the rotating drum are alternately repeated. One feature is that the forward / reverse rotation drive mode is executed after the process.

  According to such a feature, when the forward / reverse arc rotation drive mode is executed, the laundry is attached to the inner surface of the rotating drum by the sudden forward arc rotation and the sudden reverse arc rotation of more than 90 degrees and less than 200 degrees of the rotating drum. The maximum of 90 degrees and less than 180 degrees, and the laundry in the braking state for the reversal of rotation that occurs in the final stage of the lifting of the laundry in the sudden arc rotation and the sudden arc rotation. It can be forcibly removed from the inner surface of the rotating drum by inertia and its own weight, and can be dropped from the inner surface of the rotating drum to the side opposite to the lifting side by its own weight. In this case, the left and right can be alternately switched, so that the unraveling action of the laundry can be enhanced and the mechanical force can be exerted on the laundry. Therefore, by executing this forward / reverse arc rotation drive mode after the dehydration process, the laundry is strongly pressed against the inner surface of the rotating drum in the dehydration process in the state of entanglement, twisting, and wrinkles at the end of the washing process and the rinsing process. The tendency to be stuck and strongly brazed is that the left and right positions of the laundry are switched alternately and the left and right positions of the laundry are replaced with each other. Stretching can be sufficiently achieved by hitting the object when it is dropped.

  Furthermore, the arc rotation of the rotating drum is driven at a rapid acceleration by which the laundry adheres to the inner surface of the rotating drum by 90 degrees, so that the rotating drum easily falls by about 90 degrees due to its own weight. Even when the laundry is lightly dehydrated, the sudden acceleration applied to the inner surface of the rotating drum prevents the laundry from slipping to the arc rotation position. Therefore, the inertia corresponding to the rotational speed of the rotating drum is given and reliably lifted to the braking state. It is possible to more reliably achieve peeling at the time of change, and thus, where the left and right positions of the laundry are interchanged.

  Further, the forward / reverse switching of the arc rotation direction of the rotating drum is performed by sandwiching a sudden braking operation when the arc rotation of the rotating drum is more than 90 degrees and less than 200 degrees, thereby rotating the laundry. Even under conditions that satisfy the rapid acceleration that guarantees sticking to the drum inner surface, the arc rotation direction is reversed rapidly in the forward and reverse directions, and the laundry is reliably peeled off by the inertia and dead weight during the rapid acceleration at the final stage of the arc rotation. It is made to fall on the opposite side to the lifting side, and the loss of mechanical force application to the laundry can be suppressed.

  Here, in the drum type washing machine of the present invention, the rotation axis direction of the rotating drum formed in the bottomed cylindrical shape is horizontal or inclined downward from the horizontal direction from the front side to the back side as the bottom. In this way, the laundry is attached to the inner surface of the rotating drum by the centrifugal force generated by the rapid arc rotation of the rotating drum and lifted upward, and then the laundry is put on by sudden braking of the rotating drum. It is equipped with a forward / reverse arc rotation drive mode in which the drive to peel off and fall from the inner surface of the rotating drum due to its inertia is performed alternately and forward and reverse, and the forward / reverse arc rotation drive mode is executed after the dehydration process. Can be considered as another feature.

  More preferably, the rotating drum formed in the bottomed cylindrical shape is placed in the water tank so that the rotation axis direction is inclined horizontally or downward from the horizontal direction from the opening front side toward the bottom side. The laundry is attached to the inner surface of the rotating drum by the centrifugal force generated by the rapid arc rotation of the rotating drum and lifted up to the upper range of the rotating drum, and then the inertia of the laundry is suddenly braked by the rotating drum. And a forward / reverse arc rotation drive mode that repeats alternately and forward / reverse arc rotation drive mode after peeling from the inner surface of the rotating drum due to its own weight and dropping it to the side opposite to the lifting side of the lower range of the rotating drum due to its inertia and its own weight. Another feature is that the forward / reverse arc rotation drive mode is executed.

  In these cases, as in the case of the above one feature, it is preferable to repeat the sudden forward arc rotation and the sudden reverse arc rotation of the rotating drum at less than 200 degrees, and it is best to perform the rotation more than 90 degrees. .

  In addition, when the motor is driven by the first drum drive instruction and the step-out limit of the motor is exceeded, the motor is driven by the second drum drive instruction that does not exceed the upper limit load. Even if there is a difference in driving load from time to time, the lifting and peeling behavior for the laundry can be obtained as set.

  In addition, by changing the driving of the rotating drum according to the elapsed time or the amount of laundry, it corresponds to the change in the state of the laundry after the dehydration process or the difference in driving load due to the amount of laundry. The rotating drum can be driven optimally for laundry.

  It has a forward / reverse continuous rotation drive mode in which continuous rotation of the rotating drum is repeated forward and backward alternately at a rotational speed at which the laundry lifted by the rotation of the rotating drum exhibits a behavior of dropping from a height where its own weight wins. The reverse arc rotation drive mode is executed alternately with the forward / reverse continuous rotation drive mode or between forward / reverse switching in the forward / reverse continuous rotation drive mode. Usually, at the end of the dehydration process, the laundry is in a state of being strongly pressed and stuck to the inner surface of the rotating drum almost all around, but in this state, the laundry is repeatedly rotated over 90 degrees and less than 200 degrees. When the forward / reverse arc rotation drive mode is executed, the attached laundry positioned in the upper part of the rotary drum is peeled off from the inner surface of the rotary drum and is unraveled by the forward / reverse arc rotation drive mode. Since the laundry stuck to the lower part of the drum only repeats the rotation of the rotating drum exceeding 90 degrees and less than 200 degrees, it remains stuck without being peeled off from the inner surface of the rotating drum. Therefore, by executing the forward / reverse continuous rotation drive mode between the forward / reverse arc rotation drive mode, the partially peeled laundry moves around in the rotating drum, and the laundry that remains stuck is removed. It can exert a peeling action. In addition, the forward and reverse continuous rotation drive mode may change the circumferential position of the rotating drum, so that the laundry attached to the lower part of the rotating drum may be positioned in the upper part of the rotating drum. By executing the forward / reverse arc rotation drive mode, the laundry stuck to the inner surface of the rotating drum can be surely peeled off, and as a result, the inner surface of the rotating drum is strongly pressed and stuck to the inner surface of the rotating drum. The laundry can be peeled evenly and unraveled.

  In addition, by setting a rotation pause time between the forward / reverse continuous rotation drive mode and the forward / reverse arc rotation drive mode, the behavior of the rotating drum and the laundry in the different drive modes before and after can be controlled. Once settled, the behavior of the next drive mode can be obtained easily and early without being affected by the behavior of the rotating drum or the laundry in the previous drive mode.

  The execution ratio between the forward / reverse continuous rotation drive mode and the forward / reverse arc rotation drive mode can be changed, and the execution ratio between the forward / reverse continuous rotation drive mode and the forward / reverse arc rotation drive mode is the elapsed time or the laundry. For example, in the initial stage, the ratio of the forward / reverse continuous rotation drive mode is used in order to surely remove all of the laundry stuck around the entire inner surface of the rotary drum. After a predetermined time has elapsed, it is preferable to increase the forward / reverse arc rotation drive mode in order to release the tangling or twisting of the laundry, and the forward / reverse depending on the amount of laundry. By reducing and increasing the execution ratio of the arc rotation drive mode to the normal / reverse continuous rotation drive mode, the washing characteristics of the normal / reverse arc rotation drive mode can be maximized without excessive or insufficient drive load.

  According to the present invention, by executing the forward / reverse arc rotation drive mode, the laundry is lifted up to the upper left and right sides of the rotating drum by the forward / reverse arc rotation of the rotating drum alternately and forward / reversely. In the braking state at or near the end of lifting, the laundry is peeled off from the inner surface of the rotating drum reliably and instantaneously by the forced peeling force and its own weight due to its inertia, and repeatedly dropped to the left and right sides of the rotating drum. The laundry lifting position and falling position can be interchanged alternately with each rotation. Therefore, the unraveling action of the laundry can be enhanced to prevent twisting and sticking to the inner surface of the rotating drum as well as entanglement, and the laundry can be easily taken out and wrinkles can be greatly reduced. In particular, by executing such forward / reverse arc rotation drive mode after the dehydration process, the laundry is strongly applied to the inner surface of the rotary drum in the state of entanglement, twisting, and wrinkles at the end of the washing process and rinsing process in the dehydration process. The tendency to press and stick strongly is greatly eliminated by the above-mentioned high unwinding action, mechanical force action, and tapping action when the laundry is dropped, and it is easy to take out the laundry. And post-processing is easy. In addition, since a high finished state can be obtained, it is possible to greatly reduce the labor of stretching the heels.

  Hereinafter, a drum type washing machine according to an embodiment of the present invention will be described with reference to FIGS. 1 to 8 for the understanding of the present invention. In addition, the following description is a specific example of this invention, Comprising: The content of description of a claim is not limited.

  The drum type washing machine of the present embodiment has the basic configuration described above, and the motor 5 is controlled by a control device such as a control board 9 equipped with a microcomputer in accordance with the mode setting and control program from the operation panel 14 shown in FIG. The water supply system 7, the drainage system 11, and the drying system 13 are automatically controlled to perform at least a cleaning process, a rinsing process, and a drying process. The water supply system 7 can supply water in a timely manner as indicated by a solid arrow by opening and closing the electromagnetic valve, and the water supply can be used to supply the detergent in the detergent container into the water tank 2 in a timely manner. The drainage system 11 can drain as shown by a one-dot chain line arrow when necessary, such as at the end of the washing process or at the end of the rinsing process, by opening and closing the electromagnetic valve. The drying system 13 is a waste thread in the air introduced from the water tank 2 and the rotating drum 4 in a circulation path in which the air in the water tank 2 and the rotating drum 4 is circulated by the blower 12 as indicated by the broken-line arrows shown in FIGS. A filter 15 that collects and removes dust, a dehumidifying part 16 that dehumidifies the introduced air after dust removal, and a heating part 17 that heats the air after dehumidification to make dry high-temperature air. Located downstream, it is less susceptible to moisture. In the illustrated example, the dehumidifying unit 16 and the heating unit 17 are an evaporator and a condenser that circulate refrigerant through a compressor 18 and exchange heat with circulating air, and constitute an air conditioner 19. However, it is not limited to this.

  The rotating drum 4 is installed with the motor 5 on the water tank 2 directly connected to the rotating shaft 4a, and along with the water tank 2, the rotating shaft direction is inclined from the horizontal direction to the angle θ = 20 ± 10 degrees from the opening side to the bottom side. However, compared with the case of installation in the horizontal direction, even if the rotary drum 4 is installed at the same height, the laundry can be easily put in and out without taking an unreasonable posture in which the opening is inclined upward. In particular, from the experience of the present inventors, by setting the inclination angle θ to 20 ± 10 degrees, even if there is a difference in height from a child (excluding infants) to an adult, even a wheelchair user, laundry It is possible to obtain a state in which the operation of loading and unloading is most easily performed. Further, there is an advantage that a deep water storage state can be obtained even with a small amount of water because water supplied into the rotating drum 4 is accumulated on the back side.

  However, as described above, since the dehydration process is performed by continuous rotation at a high speed of, for example, 1000 rpm, the laundry is entangled, twisted, and twisted in the washing process and the rinsing process. Since it sticks to the inner surface and brazes it, it is difficult to take out the laundry, and it is easy to leave hard wrinkles on the laundry, which requires much labor.

  In order to cope with this, in the present embodiment, the control board 9 is used for the bottomed cylindrical rotary drum 4 installed so that the rotation axis direction is inclined downward from the horizontal direction from the opening side toward the bottom side. With respect to drive control, the rotary drum 4 is provided with a normal / reverse arc rotation drive mode that alternately repeats a sudden forward arc rotation and a sudden reverse arc rotation of more than 90 degrees and less than 200 degrees, and this forward / reverse arc rotation drive mode is provided after the dehydration step. Execute.

  With respect to the forward / reverse arc rotation drive mode, the movement of the laundry 21 at that time will be described with reference to FIG. In addition, this FIG. 4 is a schematic diagram for demonstrating the motion of the actual laundry 21, and does not limit the content of description of a claim. In such a forward / reverse arc rotation drive mode, the laundry 21 shown in FIG. 4 is circled in FIG. 4A due to the sudden forward arc rotation and the sudden reverse arc rotation of the rotating drum 4 exceeding 90 degrees and less than 200 degrees. The position is lifted from 90 degrees to less than 180 degrees from the broken line position illustrated by reference numerals 2, 4, and 6 to the solid line position.

  First, after the circled symbol 1 in FIG. 4A, at the start, as shown by the circled symbol 2 in FIG. 21 is attached to the inner surface of the rotating drum 4 and lifted. After that, as shown by a circled symbol 3 in FIG. 4A, sudden braking is applied to suddenly decelerate to a position of 165 degrees in the forward rotation direction. At this time, the laundry 21 is peeled off from the inner surface of the rotary drum 4 due to its inertia and its own weight when the rotational speed of the rotary drum 4 becomes 50 rpm or less, that is, in the vicinity of 135 degrees in the forward rotation direction. Falls towards the side opposite the lifting side. Thereafter, the rotating drum 4 rotates to near 165 degrees in the forward rotation direction due to inertia, whereby the laundry 21 rotates to near 15 degrees in the forward rotation direction.

  Next, as indicated by a circled symbol 4 in FIG. 4A, the laundry 21 is rapidly accelerated to about 85 degrees in the reverse rotation direction, that is, 50 rpm or more by rotating in the reverse rotation direction 100 degrees. Stick and lift. Thereafter, as indicated by a circled symbol 5 in FIG. 4A, sudden braking is applied and the vehicle decelerates rapidly to a position of 165 degrees in the reverse direction. At this time, the laundry 21 is peeled off from the inner surface of the rotating drum 4 due to its inertia and its own weight when the rotational speed of the rotating drum 4 becomes 50 rpm or less, that is, around 135 degrees in the reverse rotation direction. Drop toward the side opposite the lifting side. Thereafter, the rotary drum 4 rotates to 165 degrees in the reverse rotation direction due to inertia, whereby the laundry 21 rotates to near 15 degrees in the reverse rotation direction.

  Further, as indicated by a circled symbol 6 in FIG. 4A, the laundry 21 is rapidly accelerated to about 85 degrees in the forward rotation direction, that is, at a rotation speed of 100 degrees in the forward rotation direction to 50 rpm or more. Stick it on and lift it. After that, as shown by a circled symbol 3 in FIG. 4A, sudden braking is applied to suddenly decelerate to a position of 165 degrees in the forward rotation direction. At this time, the laundry 21 is peeled off from the inner surface of the rotary drum 4 due to its inertia and its own weight when the rotational speed of the rotary drum 4 becomes 50 rpm or less, that is, in the vicinity of 135 degrees in the forward rotation direction. Falls towards the side opposite the lifting side. Thereafter, the rotating drum 4 rotates to near 165 degrees in the forward rotation direction due to inertia, whereby the laundry 21 rotates to near 15 degrees in the forward rotation direction.

  That is, by performing this arc rotation drive in the order of circled signs 2, 4, 6, 4, 6,... Shown in FIG. 4 (a), the circled sign 3 shown in FIG. 5, the laundry 21 is moved from the inner surface of the rotating drum 4 due to its inertia and its own weight in a braking state for reversal of rotation that occurs in the final stage of lifting the laundry 21 in the sudden forward arc rotation and the sudden reverse arc rotation. It can be forcibly peeled off and dropped from the inner surface of the rotating drum 4 toward the side opposite to the lifting side by its own weight. In addition, the lifting position and the falling position of the laundry 21 can be alternately switched left and right as shown in FIG. The mechanical force can be exerted on the laundry 21.

  As a result, the laundry 21 is lifted up to the upper left and right sides of the rotating drum 4 alternately by the forward and reverse arc rotations of the rotating drum 4, and the braking at the final stage of lifting the laundry 21 is performed alternately. In the state, the laundry 21 is peeled off from the inner surface of the rotating drum 4 surely and instantaneously by the forced peeling force and its own weight due to its inertia, and dropped to the left and right sides of the rotating drum 4. The lifting position and the falling position are alternately switched, and the unwinding action of the laundry 21 is enhanced to prevent twisting and sticking to the inner surface of the rotating drum 4 as well as entanglement. It is possible to greatly relieve wrinkles. Further, since the mechanical force can be applied uniformly to the laundry 21 and the number of times the laundry 21 having a tapping action is dropped is greatly increased, the function of each process performed by the washing machine including the washing effect can be enhanced.

  Therefore, by executing such a forward / reverse arc rotation drive mode after the dehydration step, the laundry 21 in the dehydration step is entangled, twisted and twisted at the end of the washing step and the rinsing step. That is strongly pressed and sticked to the surface of the rotating drum 4 is peeled off from the inner surface of the rotating drum 4, the left and right positions of the laundry 21 are alternately switched, and the left and right of the laundry 21 are thereby interchanged. A high unwinding action with replacement, an action with uneven mechanical force, and a wrinkle stretch due to a tapping action when the laundry 21 is dropped can be sufficiently achieved. As a result, the laundry 21 can be easily taken out, post-processing can be facilitated, and a high finished state can be obtained to greatly reduce the labor of stretching the folds.

  Here, the sudden forward arc rotation and the sudden reverse arc rotation of the rotating drum 4 are executed by being driven and executed at a rapid acceleration by which the laundry 21 sticks to the inner surface of the rotating drum 4 up to 90 degrees. The laundry 21 does not slip to the arc rotation position due to the rapid acceleration of the light laundry 21 after being dehydrated up to about 90 degrees, which becomes easy to fall due to its own weight, to the arc rotation position. Inertia commensurate with the rotational speed is imparted and lifted to the arc rotation end position with certainty, and forced peeling in a predetermined direction at the time of change to the braking state can be achieved more reliably.

  Further, the forward / reverse switching of the rotating direction of the arc of the rotating drum 4 is performed with an abrupt braking operation when the arc rotation of the rotating drum 4 exceeds 90 degrees and less than 200 degrees, thereby ensuring that the laundry 21 is stuck. Even under conditions that satisfy the sudden acceleration, the arc rotation direction is suddenly reversed in the forward and reverse directions, and at the final stage of the arc rotation of the laundry 21, high inertia at the rapid acceleration and peeling due to its own weight are reliably achieved, and washing is performed. It is possible to suppress the time loss of applying mechanical force to the object 21. Accordingly, it is possible to prevent entanglement and twisting while mitigating each step of the washing machine in a shorter time and to reduce wrinkling.

  In view of the behavior of the laundry 21 as described above, the forward / reverse arc rotation drive mode of the present embodiment also causes the laundry 21 to move to the inner surface of the rotary drum 4 by the centrifugal force due to the sudden arc rotation of the rotary drum 4. Then, the laundry 21 is peeled off from the inner surface of the rotating drum 4 due to its inertia and its own weight by the sudden braking of the rotating drum 4 and then repeatedly driven alternately in the forward and reverse directions. Can be seen as a thing.

  More preferably, the laundry 21 is attached to the inner surface of the rotating drum 4 by the centrifugal force caused by the rapid arc rotation of the rotating drum 4 and lifted up to the upper range of the rotating drum 4, and then the rotating drum 4 is suddenly braked. Forward / reverse arc rotation in which the laundry 21 is peeled off from the inner surface of the rotating drum 4 due to its inertia and its own weight and dropped to the opposite side to the lifting side of the lower range of the rotating drum 4 due to its inertia and its own weight. A drive mode is provided, and the forward / reverse arc rotation drive mode is executed after the dehydration step.

  Also in these cases, it is preferable to repeat the sudden forward arc rotation and the sudden reverse arc rotation of the rotating drum 4 at less than 200 degrees for the reasons already described, and it is best to perform the rotation at more than 90 degrees.

Here, in the rotating drum 4 having a diameter of about 500 ± 50 mm, when the gravity is decomposed in the tangential direction with respect to the drum center direction, the drum rotation speed at which the force in the center direction and the centrifugal force are balanced is as follows.
mrω ² = mg cos θ
As shown in FIG. 5, the result is as shown by a thick solid line indicated as “sticking level” shown in FIG. The circled code shown in FIG. 5 corresponds to the circled code shown in FIG. From the time of the stop indicated by the circled symbol 1 in FIG. 5 to the rotation speed of about 60 rpm in the vicinity indicated by the circled symbol 2, the attachment of the laundry 21 is reliably achieved. Further, the rotation angle θ of the rotating drum 4 necessary for this is less than 90 degrees, which satisfies the above-described conditions. In addition, in the above description, the lifting by laminating the laundry 21 is more than 90 degrees and less than 180 degrees of the rotating drum 4, but in this example, the rotation angle is around 165 degrees indicated by a circled symbol 2, The brake is stopped at a rotation angle of about 165 degrees that reaches a circled symbol 3 from a rotation angle of about 85 degrees, and may be peeled by about 50 rpm, which is peeled off from the inner surface of the rotating drum 4 due to the inertia and self-weight acting on the laundry 21, and a slight deceleration state. I understand.

  From such calculation and experience, the maximum rotation speed of the arc rotation in the forward / reverse arc rotation drive mode is 50 rpm or more, and the laundry 21 is not peeled off or braking is performed at the maximum rotation speed. Effectiveness by the rotational drive mode can be obtained. Also, the lifted laundry 21 in the forward / reverse arc rotation drive mode can be peeled at a speed of less than 50 rpm using braking performed in the range of a rotation angle of 85 degrees to 165 degrees as shown in the illustrated example. Specifically, the forced peeling force and gravity corresponding to the deceleration to less than 50 rpm are applied to the laundry 21 due to the inertia of the laundry 21 attempting to continue the rotation at 50 rpm or higher due to the deceleration state from the arc rotation performed at 50 rpm or higher. To be dropped.

  Further, in the forward / reverse arc rotation drive mode, the initial arc rotation indicated by a circled symbol 2 in FIG. 4A is performed in the vicinity of 165 degrees as indicated by a broken line in FIG. 5, and FIG. The subsequent arc rotation shown in FIG. 5 is performed in the range of around 165 degrees to −15 degrees as shown by a solid line in FIG. As indicated by a broken line in the reference numeral 2, the laundry 21 that is stationary in the lower range of the rotary drum 4 is more than 90 degrees and less than 200 degrees, and more specifically, an arc rotation near 165 degrees on the left and right initial arc rotation side. It is ensured that it is lifted up to the upper part (around 135 degrees) and dropped on the opposite side of the rotating drum 4, specifically on the diameter line of the rotating drum 4, and the subsequent arc rotation is around 180 degrees (around 165 degrees) As a range of around −15 degrees) Specifically, while the laundry 21 that has fallen by about 30 degrees is sandwiched between about -15 degrees of inertia rotation and arc-rotated to 165 degrees on the same side of the rotating drum 4, specifically about 135 degrees. The behavior of lifting to a nearby position and dropping to the opposite side of the rotating drum 4 can be reliably achieved by obtaining a maximum drop distance that is approximately symmetrical and that is the diameter of the rotating drum 4. Thereby, the effect of unraveling and hitting the laundry 21 can be enhanced.

  According to the inventor's confirmation, when the maximum rotation speed of the arc rotation in the forward / reverse arc rotation drive mode is less than 50 rpm, the laundry 21 is rotated by the rotating drum 4 in the rotational inertia acting on the laundry 21 by the braking of the rotating drum 4. The behavior of peeling off from the inner surface of the rotating drum 4 does not occur, and the laundry 21 rotates with the rotating drum 4 while being stuck to the inner surface of the rotating drum 4 even when the rotating drum 4 is reversed.

  Furthermore, when the rotation angle of the rotating drum 4 is 90 degrees or less, the laundry 21 cannot be lifted. When the rotation angle of the rotating drum 4 is 200 degrees or more, the laundry 21 is washed when the rotating drum 4 is reversed. The article 21 passes through the position of 180 degrees (the uppermost part), and the operation such that the laundry 21 as shown in FIG.

  By the way, in order to realize the forward / reverse arc rotation driving mode of the rotating drum 4 as described above, the driving load applied to the motor 5 is very large, which causes an increase in the number of poles of the motor 5. In the embodiment, as shown in FIGS. 1 and 3, an inner rotor 5b1 and an outer rotor 5b2, which are directly connected to a rotating shaft 4a, are attached to both the inner peripheral side and the outer peripheral side of the stator 5a. The drive power can be doubled without the problem of increasing the size of the motor 5 and the forward / reverse arc rotation drive mode with sudden reversal can be executed without difficulty by the small motor 5. .

  As a result, a technology capable of permanently executing the forward / reverse arc rotation drive mode with rapid reversal with a rotational speed characteristic with a good left / right balance as shown in FIG. 5 is realized, and the forward / reverse rotation of the laundry 21 is realized. In any case, the laundry 21 is dropped at approximately the same position of the rotating drum 4 indicated by the circled symbols 3 and 5, and the rotation from the time of dropping to the vicinity of −15 degrees of inertial rotation is sandwiched, and approximately the same rotation angle position of 85 degrees. (Rotation of the rotating drum 4 is 85 + 15 = 100 degrees) The laundry by the sudden braking after reaching the position of the circled signs 4 and 6 at almost the same rotation angle after reaching the pasting area of the laundry 21 in the vicinity Peeling from the rotating drum 4 is achieved. The required time from the peeling position indicated by the circled symbol 3 to the peeling position indicated by the circled symbol 5 is about 0.8 seconds, and from the peeling position indicated by the circled symbol 5 to the peeling position indicated by the circled symbol 3. The required time is about 0.8 seconds, and both are equal.

  In such a forward / reverse arc rotation drive mode, continuous rotation of the rotating drum 4 is repeated alternately forward / reversely at a rotational speed at which the laundry lifted by the rotation of the rotating drum exhibits a behavior of falling from the height at which its own weight wins. It is configured so as to be executed between the forward / reverse continuous rotation drive mode and between the forward / reverse switching in the alternate or forward / reverse continuous rotation drive mode. Usually, at the end of the dehydration process, the laundry 21 is in a state where it is strongly pressed and stuck to the inner surface of the rotating drum 4 over almost the entire circumference. In this state, the laundry 21 is rotated more than 90 degrees and less than 200 degrees. When the forward / reverse arc rotation drive mode is repeated, the attached laundry 21 located in the upper part of the rotary drum 4 is peeled off from the inner surface of the rotary drum 4 in the forward / reverse arc rotation drive mode. However, since the laundry 21 attached to the lower part of the rotating drum 4 only repeats the rotation of the rotating drum 4 exceeding 90 degrees and less than 200 degrees, it is not peeled off from the inner surface of the rotating drum 4, It remains attached. Therefore, by executing the forward / reverse continuous rotation drive mode between the forward / reverse arc rotation drive modes, the partially peeled laundry 21 moves around in the rotary drum 4, and the laundry remains in a stuck state. The action of peeling off the object 21 can be exerted. Further, there is a possibility that the laundry 21 attached to the lower part of the rotating drum 4 may be positioned in the upper part of the rotating drum 4 by changing the circumferential position of the rotating drum 4 by the forward / reverse continuous rotation driving mode. In addition, by executing the next forward / reverse arc rotation drive mode, the laundry 21 attached to the inner surface of the rotating drum 4 can be surely peeled off, so that it is strongly pressed almost entirely around the inner surface of the rotating drum 4. The laundry that has become stuck can be peeled evenly and unraveled, and the individual laundry 21 as shown in FIGS. A state is obtained. Further, when the drying process is subsequently performed, the air permeability of the laundry 21 is improved, and the laundry 21 is dried in a short time. In the drying process, the forward / reverse arc rotation drive mode and the forward / reverse continuous rotation drive mode are set. When the combination is executed, the beating action is stretched and further finished with less wrinkles, and the laundry 21 is further softer, and even with a thin cloth material product, the wrinkle is extremely low compared with the conventional one, and the finished state is very high. . With pile products, the piles stand without going to sleep, and non-woven fabric products are not scary.

  Although the motor 5 is powered up, excessive power-up is uneconomical. Therefore, when the motor 5 is driven by the first drum driving instruction and the step-out limit of the motor 5 is exceeded, the upper limit load is exceeded. The rotation of the rotating drum 4 can be obtained by driving the motor 5 in accordance with the second drum driving instruction not exceeding the range, so that the lifting and peeling behavior of the laundry 21 can be obtained as set, even if the driving load varies from time to time. The characteristics are guaranteed and the upper limit of power-up can be suppressed. For this purpose, for example, the rotational speed of the rotating drum 4 may be monitored and feedback controlled.

  In addition, by making it possible to change the driving of the rotating drum 4 according to the elapsed time or the amount of the laundry 21, for example, in the initial stage, the ratio of the forward / reverse continuous rotation driving mode is increased, and the inner surface of the rotating drum 4 is substantially reduced. The laundry 21 attached over the entire circumference is surely peeled off, and after a predetermined time has elapsed, the tangled or twisted laundry 21 can be released by increasing the forward / reverse arc rotation drive mode. Further, the rotary drum 4 can be driven optimally for the laundry corresponding to the difference in the driving load depending on the amount of the laundry 21, but various known detection methods can be used for the amount of the laundry 21 and the driving load. That's fine.

  On the other hand, as described above, the driving load in the forward / reverse arc rotation drive mode is high, and the rotating drum 4 repeats forward arc rotation and reverse arc rotation within a predetermined range. 3 is less likely to change, and a load tends to be applied to a portion located in the same lower position at all times, so that there is a problem in that the rotation shaft 4a and the bearing 10 shown in FIG. . However, while the drive load in the forward / reverse arc rotation drive mode is large, the load in the whole washing process can be reduced by executing the forward / reverse continuous rotation drive mode with a small drive load in a timely manner. It is possible to change the position of the bearing portion 4a and prevent the bearing portion 10 of the rotating shaft 4a from being reduced or prematurely rattling, and the laundry 21 in the forward / reverse continuous rotation drive mode. Tangle, twist, and wrinkle can be solved in forward and reverse arc rotation drive mode.

  Conventionally, the forward / reverse continuous rotation drive mode is repeated about 40 rpm in about forward / reverse intervals, but can be executed in combination with the forward / reverse arc rotation drive mode without changing this or in various ways. More specifically, the forward / reverse arc rotation drive mode D as shown in FIG. 6 is an α pattern executed alternately with the forward / reverse continuous rotation drive mode T, or the forward / reverse continuous rotation drive mode T as shown in FIG. It can be executed as a β, γ pattern or the like in which the number of repetitions of the forward / reverse arc rotation drive mode D in the forward / reverse arc rotation drive mode D is varied in magnitude. Accordingly, the laundry 21 in the forward / reverse continuous rotation drive mode T is reduced while the mechanical load is reduced by the combined use of the forward / reverse arc rotation drive mode D having a higher drive load and the forward / reverse continuous rotation drive mode T having a lower drive load. From the entanglement, twist, and wrinkle, the imbalance in applying mechanical force to the laundry 21 can be corrected according to the execution ratio of the forward / reverse arc rotation drive mode. In particular, after the dehydration step, the α pattern, β pattern, and γ pattern are sequentially executed to shift to the drying step, and the number of forward and reverse arc rotation repetitions in the forward and reverse arc rotation drive mode D is sequentially increased. In the beginning, the laundry 21 attached to almost the entire circumference of the inner surface of the rotating drum 4 is surely peeled off, and then the heel-stretching action is enhanced, and the laundry is released more effectively and transferred to the drying process. As described above, the drying process is efficiently performed, and the laundry 21 with less wrinkles can be obtained. In addition, by setting a rotation pause time (pause period K) between the forward / reverse continuous rotation drive mode T and the forward / reverse arc rotation drive mode D, the rotating drum 4 in the different drive modes T and D before and after is set. Then, the behavior of the laundry 21 is temporarily settled, and the behavior of the next drive mode can be obtained easily and early without being affected by the behavior of the rotary drum 4 and the laundry 21 in the previous drive mode, and the drive load is reduced. A pause time of about 1 second is sufficient.

  However, the combination pattern of both T and D modes is not limited to this, and the execution ratio of the forward / reverse arc rotation drive mode to the forward / reverse continuous rotation drive mode is reduced depending on the amount of the laundry 21. By increasing, it is possible to make the most of the unraveling characteristics of the laundry 21 in the forward / reverse arc rotation drive mode without excessive or insufficient changes in the selection conditions and drive load due to elapsed time.

  It is practically used in a drum-type washing machine in which a rotating drum is installed in a horizontal direction or at an inclination, and it is possible to eliminate tangling, twisting, and wrinkles that are strongly brazed after the dehydration process.

It is sectional drawing which shows the principal part structure of the drum type washing machine which concerns on embodiment of this invention. It is the rear view which looked at the inside of the drum type washing machine of FIG. It is sectional drawing which shows the substantially half part of the motor attachment part of the drum type washing machine of FIG. (A) Process drawing of the forward / reverse arc rotation drive mode in the drum type washing machine of FIG. 1, (b) It is explanatory drawing which shows the right-and-left interchange of the lifting position and dropping position of the laundry. FIG. 3 is an analysis diagram of rotational characteristics with respect to the sticking and peeling of the laundry on the inner surface of the rotating drum for ideally realizing the forward and reverse arc rotation driving mode in the drum type washing machine of FIG. 1. It is a graph which shows one example of the combination pattern of the normal / reverse continuous rotation drive mode and the normal / reverse arc rotation drive mode in the drum type washing machine of FIG. It is a graph which shows another example of the combination pattern of the normal / reverse continuous rotation drive mode and the normal / reverse arc rotation drive mode in the drum type washing machine of FIG. FIG. 8 is a copy diagram showing two state examples of the laundry after the forward / reverse arc rotation drive mode in the embodiment shown in FIGS. It is a copy figure which shows two example states of the laundry after the spin-drying | dehydration process in the drum type washing machine which concerns on a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Case 2 Water tank 3 Hole 4 Rotating drum 5 Motor 6 Door 7 Water supply system 9 Control board 11 Drain system 12 Blower 13 Drying system 14 Operation panel

  In the present invention, a rotating drum formed in a bottomed cylindrical shape is installed in a water tank so that the direction of the rotation axis is horizontal or inclined downward from the horizontal direction from the front side to the open side to the back side as the bottom. The present invention relates to a drum type washing machine for washing laundry stored in a rotating drum by rotationally driving the rotating drum.

  Referring to FIG. 1 showing an embodiment of the present invention, such a drum type washing machine has a rotating drum 4 in which a number of holes 3 are formed in a water tank 2 supported by a suspension structure in a housing 1. The rotary drum 4 is rotationally driven by a motor 5 and opens a door 6 that can be opened and closed on the front side of the housing 1 to pass through the front opening of the water tank 2 and the front opening of the rotary drum 4. The laundry can be taken in and out of the rotary drum 4.

  In the conventional normal washing mode, when the door 6 is opened and the laundry is put into the rotating drum 4 and the operation is started with the introduction of the detergent, the water tank 2 is supplied with water from the water supply system 7 and supplied. A required amount of water is also supplied into the rotary drum 4 through the holes 3. When the rotary drum 4 is rotated by the motor 5 at a rotational speed of, for example, about 50 rpm, the laundry stored in the rotary drum 4 is hooked on the stirring protrusion 8 provided on the inner peripheral surface of the rotary drum 4 and rotated. When the laundry is lifted in the direction and dropped from an appropriate height, the laundry is washed by applying the action of tapping. After this washing process, the dirty washing water is drained by the drainage system 11, and the rinsing process is performed using the newly supplied water. When the rinsing process is completed, the rotating drum 4 is rotated at a high speed of about 1000 rpm, for example. A dehydration step is performed. These steps are automatically executed based on a predetermined control procedure. In addition, as shown in FIG. 1, the air in the water tank 2 and the rotating drum 4 is sucked by the blower 12 and dehumidification and heating are sequentially performed, and the air is repeatedly blown into the water tank 2 and the rotating drum 4 as dry high temperature air. In a drum type washing machine called a drum type washing and drying machine equipped with the system 13, a drying process is automatically executed after the dehydration process.

By the way, the laundry may be entangled or stuck as shown in FIG. 9 (a) by continuous rotation of the washing process and the rinsing process, particularly by continuous rotation of the rotating drum at the high speed in the dehydration process. It has already been a technical problem (see, for example, Patent Document 1). Patent Document 1 utilizes the improvement in the degree of freedom of rotation control by direct coupling drive by a motor of the rotating drum, and the rotating drum is moved to a minute degree of 90 degrees or less after the dehydration process. Within the rotation angle, the laundry stuck in the rotating drum is peeled off or rotated as shown in FIG. 9 (b) by rotating forward and backward multiple times, particularly at a minute rotation angle of 10 degrees or more and less than 30 degrees. Disclosure of technology that can unravel the laundry that has been hardened at the top of the drum, eliminate imbalance during dehydration, and improve the ease of taking out laundry after drying Yes.
JP 2000-254385 A

However, forward and reverse alternating minute angular rotation performed by the technique described in Patent Document 1 after the dehydration step is performed at a speed of about 55 rpm at which the laundry as disclosed in the examples can be sufficiently adhered to the inner surface of the rotating drum. However, it is only necessary to rotate forward and backward a plurality of times within a minute rotation angle of 90 degrees or less, particularly at a minute rotation angle of 10 degrees or more and less than 30 degrees. Since it cannot be performed at a constant speed, only the area below the small angle in the middle is the predetermined speed, and before and after that, the speed increases toward the predetermined speed or decelerates from the predetermined speed, so the laundry is lifted only to a position below the small angle. I can't. As a result, even if there is a sudden deceleration due to braking at the end of the minute angle rotation and the forced peeling force from the inner surface of the rotating drum acts due to the inertia of the laundry, the laundry rotates because it is in the direction against gravity. The tendency to slide down rather than peel off in the direction away from the inner surface of the drum becomes stronger. Accordingly, the laundry that slides down is moved in the sliding-down direction by the next minute rotation of the rotating drum in the opposite direction. This is repeated thereafter, but the laundry is swung to the left and right with the sliding-down on the end side by forward / reverse rotation of the rotating drum at a small angle, and the position of the laundry is not changed so much. Even if the sticking to the inner surface of the rotating drum can be eliminated, the dehydration process is performed. The tangling, twisting, and twisting effects in the washing process and the rinsing process are not sufficient for solving the entanglement and twisting of the laundry that is strongly pressed against the inner surface of the rotating drum in a state of twisting and sticking. For this reason, it is difficult to take out the laundry because the effect of untangling and twisting is insufficient, and it is troublesome because post-processing is required to unwind and spread it. In particular, it takes time and effort to stretch twisted wrinkles and wrinkles after drying.

  An object of the present invention is to provide a drum-type washing machine that can sufficiently eliminate wrinkles and twists of the laundry after the dehydration step and reduce wrinkles and obtain a high finished state.

In order to achieve the above object, the drum type washing machine according to the present invention is configured so that a rotating drum that is formed in a bottomed cylindrical shape and is driven to rotate by a motor is rotated in the direction of the rotation axis from the front side to the bottom side. Is a drum type washing machine having a control device that is installed in a water tank so as to be inclined downward from the horizontal or horizontal direction, and controls each of the motors and the like to execute each step of washing, rinsing, dehydrating, etc. After the dehydration step, the control device causes the rotating drum to rapidly rotate by rapidly driving the motor, and the laundry is attached to the inner surface of the rotating drum by the centrifugal force generated by the rapid arc rotation of the rotating drum. If the laundry is lifted from the lowest position of the rotating drum to a position of more than 90 degrees and less than 180 degrees, suddenly braking of the rotation of the motor causes the laundry to move forward due to its inertia and its own weight. Operate, one characterized by a normal and reverse pivot rotation drive mode in which return Shi performed repeatedly alternately and so as to run together with the peeled from the rotating drum inner surface to fall on the opposite side of the lifting side of the lower range of the rotary drum It is said.

According to this feature, the execution of normal and reverse pivot rotation drive mode, by sticking the washing濯物the rotary drum inner surface Lift from the lowermost position to less than 180 degrees beyond the maximum 90 degrees, laundry operations laundry occurs the braking state by the sudden braking in the final stage of lifting of the object falls on the opposite side of the lifting side of the lower range of rotary drum while being peeled off forcibly from the rotating drum inner surface by its inertia and own weight reliably achieved, raised position of the laundry by fast pivot rotation drive of the normal and reverse alternate, since it is replaced on the left and right alternately pivot rotation drive every time the falling position, to be enhanced solutions act of laundry, machine Power can be exerted on the laundry. Therefore, by executing this forward / reverse arc rotation drive mode after the dehydration process, the laundry is strongly pressed against the inner surface of the rotating drum in the dehydration process in the state of entanglement, twisting, and wrinkles at the end of the washing process and the rinsing process. The tendency to be stuck and strongly brazed is that the left and right positions of the laundry are switched alternately and the left and right positions of the laundry are replaced with each other. Stretching can be sufficiently achieved by hitting the object when it is dropped.

Furthermore, the control device is characterized in that the maximum rotation speed of the rotating drum during forward and reverse arc rotation in the forward and reverse arc rotation drive mode is set to 50 rpm or more. Even when light laundry after dehydration is pasted to the vicinity of the degree of rotation, the sudden acceleration that sticks to the inner surface of the rotating drum prevents the laundry from slipping to the arc rotation position, thus giving the inertia corresponding to the rotational speed of the rotating drum and lifting it reliably. Peeling at the time of changing to the braking state, and thus peeling in which the left and right positions of the laundry are interchanged can be achieved more reliably.

Further, the control device drives the motor by a second drum driving instruction not exceeding an upper limit load when the motor step-out limit is exceeded by driving the motor by the first drum driving instruction. By doing so, even if there is a difference in driving load from time to time, the lifting and peeling behavior for the laundry can be obtained as set.

The control device controls the motor to repeat the continuous rotation of the rotating drum alternately forward and backward at a rotational speed that shows the behavior of the laundry lifted by the rotation of the rotating drum falling from the height where its own weight wins. The reverse continuous rotational drive mode is executed, and the forward / reverse arc rotational drive mode is executed alternately with the forward / reverse continuous rotational drive mode or between forward / reverse switching in the forward / reverse continuous rotational drive mode. And Usually, at the end of the dehydration process, the laundry is in a state of being strongly pressed and stuck to the inner surface of the rotating drum almost all around, but in this state, the laundry is repeatedly rotated over 90 degrees and less than 200 degrees. When the forward / reverse arc rotation drive mode is executed, the attached laundry positioned in the upper part of the rotary drum is peeled off from the inner surface of the rotary drum and is unraveled by the forward / reverse arc rotation drive mode. Since the laundry stuck to the lower part of the drum only repeats the rotation of the rotating drum exceeding 90 degrees and less than 200 degrees, it remains stuck without being peeled off from the inner surface of the rotating drum. Therefore, by executing the forward / reverse continuous rotation drive mode between the forward / reverse arc rotation drive mode, the partially peeled laundry moves around in the rotating drum, and the laundry that remains stuck is removed. It can exert a peeling action. In addition, the forward and reverse continuous rotation drive mode may change the circumferential position of the rotating drum, so that the laundry attached to the lower part of the rotating drum may be positioned in the upper part of the rotating drum. By executing the forward / reverse arc rotation drive mode, the laundry stuck to the inner surface of the rotating drum can be surely peeled off, and as a result, the inner surface of the rotating drum is strongly pressed and stuck to the inner surface of the rotating drum. The laundry can be peeled evenly and unraveled.

Further, the control device is characterized in that a rotation pause time is set between the forward / reverse continuous rotation drive mode and the forward / reverse arc rotation drive mode. The behavior of the object is once settled, and the behavior of the next drive mode can be obtained early without difficulty without the influence of the behavior of the rotating drum or the laundry in the previous drive mode.

The control device may be changed to run ratio of the normal and reverse continuous rotation drive mode and normal and reverse pivot rotation drive mode, further, the control device executes the normal and reverse continuous rotation drive mode and normal and reverse pivot rotation drive mode By changing the ratio according to the elapsed time or the amount of laundry, for example, in the initial stage, in order to surely remove all the laundry stuck around the entire circumference of the inner surface of the rotating drum, It is preferable to increase the forward / reverse arc rotation drive mode to increase the ratio of the forward / reverse continuous rotation drive mode, and then to untangle or twist the laundry when a predetermined time elapses. By reducing and increasing the execution ratio of the forward / reverse arc rotation drive mode to the forward / reverse continuous rotation drive mode according to the amount, the laundry characteristics of the forward / reverse arc rotation drive mode can be maximized without excessive or insufficient drive load. That.

According to the present invention, after completion of the dehydration step is Kyuko rotating the rotary drum by causing rapid drive the motor, the laundry by centrifugal force due to sudden pivot rotation of the rotary drum may stick to the rotating drum inner surface rotation when lifted to a position of less than 180 degrees beyond the maximum 90 degrees from the lowermost position of the drum, the sudden braking of the rotation of the motor, the laundry is peeled from the rotating drum inner surface Ri by its inertial Contact and own weight with the operation of lower drop in the opposite side of lifting side of the lower range of rotary drum, by which is adapted to perform a forward and reverse pivot rotation drive mode in which repeatedly in normal and reverse alternate, the laundry for each pivot rotation The lifting position and falling position can be interchanged alternately. Therefore, the unraveling action of the laundry can be enhanced to prevent twisting and sticking to the inner surface of the rotating drum as well as entanglement, and the laundry can be easily taken out and wrinkles can be greatly reduced. In particular, by executing such forward / reverse arc rotation drive mode after the dehydration process, the laundry is strongly applied to the inner surface of the rotary drum in the state of entanglement, twisting, and wrinkles at the end of the washing process and rinsing process in the dehydration process. The tendency to press and stick strongly is greatly eliminated by the above-mentioned high unwinding action, mechanical force action, and tapping action when the laundry is dropped, and it is easy to take out the laundry. And post-processing is easy. In addition, since a high finished state can be obtained, it is possible to greatly reduce the labor of stretching the heels.

  Hereinafter, a drum type washing machine according to an embodiment of the present invention will be described with reference to FIGS. 1 to 8 for the understanding of the present invention. In addition, the following description is a specific example of this invention, Comprising: The content of description of a claim is not limited.

  The drum type washing machine of the present embodiment has the basic configuration described above, and the motor 5 is controlled by a control device such as a control board 9 equipped with a microcomputer in accordance with the mode setting and control program from the operation panel 14 shown in FIG. The water supply system 7, the drainage system 11, and the drying system 13 are automatically controlled to perform at least a cleaning process, a rinsing process, and a drying process. The water supply system 7 can supply water in a timely manner as indicated by a solid arrow by opening and closing the electromagnetic valve, and the water supply can be used to supply the detergent in the detergent container into the water tank 2 in a timely manner. The drainage system 11 can drain as shown by a one-dot chain line arrow when necessary, such as at the end of the washing process or at the end of the rinsing process, by opening and closing the electromagnetic valve. The drying system 13 is a waste thread in the air introduced from the water tank 2 and the rotating drum 4 in a circulation path in which the air in the water tank 2 and the rotating drum 4 is circulated by the blower 12 as indicated by the broken-line arrows shown in FIGS. A filter 15 that collects and removes dust, a dehumidifying part 16 that dehumidifies the introduced air after dust removal, and a heating part 17 that heats the air after dehumidification to make dry high-temperature air. Located downstream, it is less susceptible to moisture. In the illustrated example, the dehumidifying unit 16 and the heating unit 17 are an evaporator and a condenser that circulate refrigerant through a compressor 18 and exchange heat with circulating air, and constitute an air conditioner 19. However, it is not limited to this.

  The rotating drum 4 is installed with the motor 5 on the water tank 2 directly connected to the rotating shaft 4a, and along with the water tank 2, the rotating shaft direction is inclined from the horizontal direction to the angle θ = 20 ± 10 degrees from the opening side to the bottom side. However, compared with the case of installation in the horizontal direction, even if the rotary drum 4 is installed at the same height, the laundry can be easily put in and out without taking an unreasonable posture in which the opening is inclined upward. In particular, from the experience of the present inventors, by setting the inclination angle θ to 20 ± 10 degrees, even if there is a difference in height from a child (excluding infants) to an adult, even a wheelchair user, laundry It is possible to obtain a state in which the operation of loading and unloading is most easily performed. Further, there is an advantage that a deep water storage state can be obtained even with a small amount of water because water supplied into the rotating drum 4 is accumulated on the back side.

  However, as described above, since the dehydration process is performed by continuous rotation at a high speed of, for example, 1000 rpm, the laundry is entangled, twisted, and twisted in the washing process and the rinsing process. Since it sticks to the inner surface and brazes it, it is difficult to take out the laundry, and it is easy to leave hard wrinkles on the laundry, which requires much labor.

  In order to cope with this, in the present embodiment, the control board 9 is used for the bottomed cylindrical rotary drum 4 installed so that the rotation axis direction is inclined downward from the horizontal direction from the opening side toward the bottom side. With respect to drive control, the rotary drum 4 is provided with a normal / reverse arc rotation drive mode that alternately repeats a sudden forward arc rotation and a sudden reverse arc rotation of more than 90 degrees and less than 200 degrees, and this forward / reverse arc rotation drive mode is provided after the dehydration step. Execute.

  With respect to the forward / reverse arc rotation drive mode, the movement of the laundry 21 at that time will be described with reference to FIG. In addition, this FIG. 4 is a schematic diagram for demonstrating the motion of the actual laundry 21, and does not limit the content of description of a claim. In such a forward / reverse arc rotation drive mode, the laundry 21 shown in FIG. 4 is circled in FIG. 4A due to the sudden forward arc rotation and the sudden reverse arc rotation of the rotating drum 4 exceeding 90 degrees and less than 200 degrees. The position is lifted from 90 degrees to less than 180 degrees from the broken line position illustrated by reference numerals 2, 4, and 6 to the solid line position.

  First, after the circled symbol 1 in FIG. 4A, at the start, as shown by the circled symbol 2 in FIG. 21 is attached to the inner surface of the rotating drum 4 and lifted. After that, as shown by a circled symbol 3 in FIG. 4A, sudden braking is applied to suddenly decelerate to a position of 165 degrees in the forward rotation direction. At this time, the laundry 21 is peeled off from the inner surface of the rotary drum 4 due to its inertia and its own weight when the rotational speed of the rotary drum 4 becomes 50 rpm or less, that is, in the vicinity of 135 degrees in the forward rotation direction. Falls towards the side opposite the lifting side. Thereafter, the rotating drum 4 rotates to near 165 degrees in the forward rotation direction due to inertia, whereby the laundry 21 rotates to near 15 degrees in the forward rotation direction.

  Next, as indicated by a circled symbol 4 in FIG. 4A, the laundry 21 is rapidly accelerated to about 85 degrees in the reverse rotation direction, that is, 50 rpm or more by rotating in the reverse rotation direction 100 degrees. Stick and lift. Thereafter, as indicated by a circled symbol 5 in FIG. 4A, sudden braking is applied and the vehicle decelerates rapidly to a position of 165 degrees in the reverse direction. At this time, the laundry 21 is peeled off from the inner surface of the rotating drum 4 due to its inertia and its own weight when the rotational speed of the rotating drum 4 becomes 50 rpm or less, that is, around 135 degrees in the reverse rotation direction. Drop toward the side opposite the lifting side. Thereafter, the rotary drum 4 rotates to 165 degrees in the reverse rotation direction due to inertia, whereby the laundry 21 rotates to near 15 degrees in the reverse rotation direction.

  Further, as indicated by a circled symbol 6 in FIG. 4A, the laundry 21 is rapidly accelerated to about 85 degrees in the forward rotation direction, that is, at a rotation speed of 100 degrees in the forward rotation direction to 50 rpm or more. Stick it on and lift it. After that, as shown by a circled symbol 3 in FIG. 4A, sudden braking is applied to suddenly decelerate to a position of 165 degrees in the forward rotation direction. At this time, the laundry 21 is peeled off from the inner surface of the rotary drum 4 due to its inertia and its own weight when the rotational speed of the rotary drum 4 becomes 50 rpm or less, that is, in the vicinity of 135 degrees in the forward rotation direction. Falls towards the side opposite the lifting side. Thereafter, the rotating drum 4 rotates to near 165 degrees in the forward rotation direction due to inertia, whereby the laundry 21 rotates to near 15 degrees in the forward rotation direction.

  That is, by performing this arc rotation drive in the order of circled signs 2, 4, 6, 4, 6,... Shown in FIG. 4 (a), the circled sign 3 shown in FIG. 5, the laundry 21 is moved from the inner surface of the rotating drum 4 due to its inertia and its own weight in a braking state for reversal of rotation that occurs in the final stage of lifting the laundry 21 in the sudden forward arc rotation and the sudden reverse arc rotation. It can be forcibly peeled off and dropped from the inner surface of the rotating drum 4 toward the side opposite to the lifting side by its own weight. In addition, the lifting position and the falling position of the laundry 21 can be alternately switched left and right as shown in FIG. The mechanical force can be exerted on the laundry 21.

  As a result, the laundry 21 is lifted up to the upper left and right sides of the rotating drum 4 alternately by the forward and reverse arc rotations of the rotating drum 4, and the braking at the final stage of lifting the laundry 21 is performed alternately. In the state, the laundry 21 is peeled off from the inner surface of the rotating drum 4 surely and instantaneously by the forced peeling force and its own weight due to its inertia, and dropped to the left and right sides of the rotating drum 4. The lifting position and the falling position are alternately switched, and the unwinding action of the laundry 21 is enhanced to prevent twisting and sticking to the inner surface of the rotating drum 4 as well as entanglement. It is possible to greatly relieve wrinkles. Further, since the mechanical force can be applied uniformly to the laundry 21 and the number of times the laundry 21 having a tapping action is dropped is greatly increased, the function of each process performed by the washing machine including the washing effect can be enhanced.

  Therefore, by executing such a forward / reverse arc rotation drive mode after the dehydration step, the laundry 21 in the dehydration step is entangled, twisted and twisted at the end of the washing step and the rinsing step. That is strongly pressed and sticked to the surface of the rotating drum 4 is peeled off from the inner surface of the rotating drum 4, the left and right positions of the laundry 21 are alternately switched, and the left and right of the laundry 21 are thereby interchanged. A high unwinding action with replacement, an action with uneven mechanical force, and a wrinkle stretch due to a tapping action when the laundry 21 is dropped can be sufficiently achieved. As a result, the laundry 21 can be easily taken out, post-processing can be facilitated, and a high finished state can be obtained to greatly reduce the labor of stretching the folds.

  Here, the sudden forward arc rotation and the sudden reverse arc rotation of the rotating drum 4 are executed by being driven and executed at a rapid acceleration by which the laundry 21 sticks to the inner surface of the rotating drum 4 up to 90 degrees. The laundry 21 does not slip to the arc rotation position due to the rapid acceleration of the light laundry 21 after being dehydrated up to about 90 degrees, which becomes easy to fall due to its own weight, to the arc rotation position. Inertia commensurate with the rotational speed is imparted and lifted to the arc rotation end position with certainty, and forced peeling in a predetermined direction at the time of change to the braking state can be achieved more reliably.

  Further, the forward / reverse switching of the rotating direction of the arc of the rotating drum 4 is performed with an abrupt braking operation when the arc rotation of the rotating drum 4 exceeds 90 degrees and less than 200 degrees, thereby ensuring that the laundry 21 is stuck. Even under conditions that satisfy the sudden acceleration, the arc rotation direction is suddenly reversed in the forward and reverse directions, and at the final stage of the arc rotation of the laundry 21, high inertia at the rapid acceleration and peeling due to its own weight are reliably achieved, and washing is performed. It is possible to suppress the time loss of applying mechanical force to the object 21. Accordingly, it is possible to prevent entanglement and twisting while mitigating each step of the washing machine in a shorter time and to reduce wrinkling.

  In view of the behavior of the laundry 21 as described above, the forward / reverse arc rotation drive mode of the present embodiment also causes the laundry 21 to move to the inner surface of the rotary drum 4 by the centrifugal force due to the sudden arc rotation of the rotary drum 4. Then, the laundry 21 is peeled off from the inner surface of the rotating drum 4 due to its inertia and its own weight by the sudden braking of the rotating drum 4 and then repeatedly driven alternately in the forward and reverse directions. Can be seen as a thing.

  More preferably, the laundry 21 is attached to the inner surface of the rotating drum 4 by the centrifugal force caused by the rapid arc rotation of the rotating drum 4 and lifted up to the upper range of the rotating drum 4, and then the rotating drum 4 is suddenly braked. Forward / reverse arc rotation in which the laundry 21 is peeled off from the inner surface of the rotating drum 4 due to its inertia and its own weight and dropped to the opposite side to the lifting side of the lower range of the rotating drum 4 due to its inertia and its own weight. A drive mode is provided, and the forward / reverse arc rotation drive mode is executed after the dehydration step.

  Also in these cases, it is preferable to repeat the sudden forward arc rotation and the sudden reverse arc rotation of the rotating drum 4 at less than 200 degrees for the reasons already described, and it is best to perform the rotation at more than 90 degrees.

Here, in the rotating drum 4 having a diameter of about 500 ± 50 mm, when the gravity is decomposed into the drum center direction and the tangential direction, the drum rotation speed in which the force in the center direction and the centrifugal force are balanced,
mrω ² = mg cos θ
As shown in FIG. 5, the result is as shown by a thick solid line indicated as “sticking level” shown in FIG. The circled code shown in FIG. 5 corresponds to the circled code shown in FIG. From the stop time indicated by the circled symbol 1 in FIG. 5 to the rotation speed of about 60 rpm in the vicinity indicated by the circled symbol 2, the laundry 21 is reliably attached. Further, the rotation angle θ of the rotating drum 4 necessary for this is less than 90 degrees, which satisfies the above-described conditions. In addition, in the above description, the lifting by laminating the laundry 21 is more than 90 degrees and less than 180 degrees of the rotating drum 4, but in this example, the rotation angle is around 165 degrees indicated by a circled symbol 2, The brake is stopped at a rotation angle of about 165 degrees that reaches a circled symbol 3 from a rotation angle of about 85 degrees, and may be peeled by about 50 rpm, which is peeled off from the inner surface of the rotating drum 4 due to the inertia and self-weight acting on the laundry 21, and a slight deceleration state. I understand.

  From such calculation and experience, the maximum rotation speed of the arc rotation in the forward / reverse arc rotation drive mode is 50 rpm or more, and the laundry 21 is not peeled off or braking is performed at the maximum rotation speed. Effectiveness by the rotational drive mode is obtained. Also, the lifted laundry 21 in the forward / reverse arc rotation drive mode can be peeled at a speed of less than 50 rpm using braking performed in the range of a rotation angle of 85 degrees to 165 degrees as shown in the illustrated example. Specifically, the forced peeling force and gravity according to the deceleration to less than 50 rpm are applied to the laundry 21 by the inertia of the laundry 21 that tries to continue the rotation at 50 rpm or higher due to the deceleration state from the arc rotation performed at 50 rpm or higher. To be dropped.

  Further, in the forward / reverse arc rotation drive mode, the initial arc rotation indicated by a circled symbol 2 in FIG. 4A is performed in the vicinity of 165 degrees as indicated by a broken line in FIG. 5, and FIG. The subsequent arc rotation shown in FIG. 5 is performed in the range of around 165 degrees to −15 degrees as shown by a solid line in FIG. As indicated by a broken line in the reference numeral 2, the laundry 21 that is stationary in the lower range of the rotary drum 4 is more than 90 degrees and less than 200 degrees, and more specifically, an arc rotation near 165 degrees on the left and right initial arc rotation side. It is ensured that it is lifted up to the upper part (around 135 degrees) and dropped on the opposite side of the rotating drum 4, specifically on the diameter line of the rotating drum 4, and the subsequent arc rotation is around 180 degrees (around 165 degrees) As a range of around −15 degrees) Specifically, while the laundry 21 that has fallen by about 30 degrees is sandwiched between about -15 degrees of inertia rotation and arc-rotated to 165 degrees on the same side of the rotating drum 4, specifically about 135 degrees. The behavior of lifting to a nearby position and dropping to the opposite side of the rotating drum 4 can be reliably achieved by obtaining a maximum drop distance that is approximately symmetrical and that is the diameter of the rotating drum 4. Thereby, the effect of unraveling and hitting the laundry 21 can be enhanced.

  According to the inventor's confirmation, when the maximum rotation speed of the arc rotation in the forward / reverse arc rotation drive mode is less than 50 rpm, the laundry 21 is rotated by the rotating drum 4 in the rotational inertia acting on the laundry 21 by the braking of the rotating drum 4. The behavior of peeling off from the inner surface of the rotating drum 4 does not occur, and the laundry 21 rotates with the rotating drum 4 while being stuck to the inner surface of the rotating drum 4 even when the rotating drum 4 is reversed.

  Furthermore, when the rotation angle of the rotating drum 4 is 90 degrees or less, the laundry 21 cannot be lifted. When the rotation angle of the rotating drum 4 is 200 degrees or more, the laundry 21 is washed when the rotating drum 4 is reversed. The article 21 passes through the position of 180 degrees (the uppermost part), and the operation such that the laundry 21 as shown in FIG.

By the way, in order to realize the forward / reverse arc rotation driving mode of the rotating drum 4 as described above, the driving load applied to the motor 5 is very large, which causes an increase in the number of poles of the motor 5. In the embodiment, as shown in FIGS. 1 and 3, an inner rotor 5b1 and an outer rotor 5b2 directly connected to a rotating shaft 4a with respect to a stator 5a fixed to the outer surface of the bottom of the water tank 2 are arranged on both the inner peripheral side and the outer peripheral side of the stator 5a. Thus, the stator 5a is allowed to act from the inner and outer circumferences, so that the drive power can be doubled without the problem of an increase in the size of the motor 5, and the forward / reverse arc rotation drive mode with sudden reversal can be executed without difficulty by the small motor 5.

  As a result, a technology capable of permanently executing the forward / reverse arc rotation drive mode with rapid reversal with a rotational speed characteristic with a good left / right balance as shown in FIG. 5 is realized, and the forward / reverse rotation of the laundry 21 is realized. In any case, the laundry 21 is dropped at approximately the same position of the rotating drum 4 indicated by the circled symbols 3 and 5, and the rotation from the time of dropping to the vicinity of −15 degrees of inertial rotation is sandwiched, and approximately the same rotation angle position of 85 degrees. (Rotation of the rotating drum 4 is 85 + 15 = 100 degrees) The laundry by the sudden braking after reaching the position of the circled signs 4 and 6 at almost the same rotation angle after reaching the pasting area of the laundry 21 in the vicinity Peeling from the rotating drum 4 is achieved. The required time from the peeling position indicated by the circled symbol 3 to the peeling position indicated by the circled symbol 5 is about 0.8 seconds, and from the peeling position indicated by the circled symbol 5 to the peeling position indicated by the circled symbol 3. The required time is about 0.8 seconds, and both are equal.

  In such a forward / reverse arc rotation drive mode, continuous rotation of the rotating drum 4 is repeated alternately forward / reversely at a rotational speed at which the laundry lifted by the rotation of the rotating drum exhibits a behavior of falling from the height at which its own weight wins. It is configured so as to be executed between the forward / reverse continuous rotation drive mode and between the forward / reverse switching in the alternate or forward / reverse continuous rotation drive mode. Usually, at the end of the dehydration process, the laundry 21 is in a state where it is strongly pressed and stuck to the inner surface of the rotating drum 4 over almost the entire circumference. In this state, the laundry 21 is rotated more than 90 degrees and less than 200 degrees. When the forward / reverse arc rotation drive mode is repeated, the attached laundry 21 located in the upper part of the rotary drum 4 is peeled off from the inner surface of the rotary drum 4 in the forward / reverse arc rotation drive mode. However, since the laundry 21 attached to the lower part of the rotating drum 4 only repeats the rotation of the rotating drum 4 exceeding 90 degrees and less than 200 degrees, it is not peeled off from the inner surface of the rotating drum 4, It remains attached. Therefore, by executing the forward / reverse continuous rotation drive mode between the forward / reverse arc rotation drive modes, the partially peeled laundry 21 moves around in the rotary drum 4, and the laundry remains in a stuck state. The action of peeling off the object 21 can be exerted. Further, there is a possibility that the laundry 21 attached to the lower part of the rotating drum 4 may be positioned in the upper part of the rotating drum 4 by changing the circumferential position of the rotating drum 4 by the forward / reverse continuous rotation driving mode. In addition, by executing the next forward / reverse arc rotation drive mode, the laundry 21 attached to the inner surface of the rotating drum 4 can be surely peeled off, so that it is strongly pressed almost entirely around the inner surface of the rotating drum 4. The laundry that has become stuck can be peeled evenly and unraveled, and the individual laundry 21 as shown in FIGS. A state is obtained. Further, when the drying process is subsequently performed, the air permeability of the laundry 21 is improved, and the laundry 21 is dried in a short time. In the drying process, the forward / reverse arc rotation drive mode and the forward / reverse continuous rotation drive mode are set. When the combination is executed, the beating action is stretched and further finished with less wrinkles, and the laundry 21 is further softer, and even with a thin cloth material product, the wrinkle is extremely low compared with the conventional one, and the finished state is very high. . With pile products, the piles stand without going to sleep, and non-woven fabric products are not scary.

  Although the motor 5 is powered up, excessive power-up is uneconomical. Therefore, when the motor 5 is driven by the first drum driving instruction and the step-out limit of the motor 5 is exceeded, the upper limit load is exceeded. The rotation of the rotating drum 4 can be obtained by driving the motor 5 in accordance with the second drum driving instruction not exceeding the range, so that the lifting and peeling behavior of the laundry 21 can be obtained as set, even if the driving load varies from time to time. The characteristics are guaranteed and the upper limit of power-up can be suppressed. For this purpose, for example, the rotational speed of the rotating drum 4 may be monitored and feedback controlled.

  In addition, by making it possible to change the driving of the rotating drum 4 according to the elapsed time or the amount of the laundry 21, for example, in the initial stage, the ratio of the forward / reverse continuous rotation driving mode is increased, and the inner surface of the rotating drum 4 is substantially reduced. The laundry 21 attached over the entire circumference is surely peeled off, and after a predetermined time has elapsed, the tangled or twisted laundry 21 can be released by increasing the forward / reverse arc rotation drive mode. Further, the rotary drum 4 can be driven optimally for the laundry corresponding to the difference in the driving load depending on the amount of the laundry 21, but various known detection methods can be used for the amount of the laundry 21 and the driving load. That's fine.

  On the other hand, as described above, the driving load in the forward / reverse arc rotation drive mode is high, and the rotating drum 4 repeats forward arc rotation and reverse arc rotation within a predetermined range. 3 is less likely to change, and a load tends to be applied to a portion located in the same lower position at all times, so that there is a problem in that the rotation shaft 4a and the bearing 10 shown in FIG. . However, while the drive load in the forward / reverse arc rotation drive mode is large, the load in the whole washing process can be reduced by executing the forward / reverse continuous rotation drive mode with a small drive load in a timely manner. It is possible to change the position of the bearing portion 4a and prevent the bearing portion 10 of the rotating shaft 4a from being reduced or prematurely rattling, and the laundry 21 in the forward / reverse continuous rotation drive mode. Tangle, twist, and wrinkle can be solved in forward and reverse arc rotation drive mode.

  Conventionally, the forward / reverse continuous rotation drive mode is repeated about 40 rpm in about forward / reverse intervals, but can be executed in combination with the forward / reverse arc rotation drive mode without changing this or in various ways. More specifically, the forward / reverse arc rotation drive mode D as shown in FIG. 6 is an α pattern executed alternately with the forward / reverse continuous rotation drive mode T, or the forward / reverse continuous rotation drive mode T as shown in FIG. It can be executed as a β, γ pattern or the like in which the number of repetitions of the forward / reverse arc rotation drive mode D in the forward / reverse arc rotation drive mode D is varied in magnitude. Accordingly, the laundry 21 in the forward / reverse continuous rotation drive mode T is reduced while the mechanical load is reduced by the combined use of the forward / reverse arc rotation drive mode D having a higher drive load and the forward / reverse continuous rotation drive mode T having a lower drive load. From the entanglement, twist, and wrinkle, the imbalance in applying mechanical force to the laundry 21 can be corrected according to the execution ratio of the forward / reverse arc rotation drive mode. In particular, after the dehydration step, the α pattern, β pattern, and γ pattern are sequentially executed to shift to the drying step, and the number of forward and reverse arc rotation repetitions in the forward and reverse arc rotation drive mode D is sequentially increased. In the beginning, the laundry 21 attached to almost the entire circumference of the inner surface of the rotating drum 4 is surely peeled off, and then the heel-stretching action is enhanced, and the laundry is released more effectively and transferred to the drying process. As described above, the drying process is efficiently performed, and the laundry 21 with less wrinkles can be obtained. In addition, by setting a rotation pause time (pause period K) between the forward / reverse continuous rotation drive mode T and the forward / reverse arc rotation drive mode D, the rotating drum 4 in the different drive modes T and D before and after is set. Then, the behavior of the laundry 21 is temporarily settled, and the behavior of the next drive mode can be obtained easily and early without being affected by the behavior of the rotary drum 4 and the laundry 21 in the previous drive mode, and the drive load is reduced. A pause time of about 1 second is sufficient.

  However, the combination pattern of both T and D modes is not limited to this, and the execution ratio of the forward / reverse arc rotation drive mode to the forward / reverse continuous rotation drive mode is reduced depending on the amount of the laundry 21. By increasing, it is possible to make the most of the unraveling characteristics of the laundry 21 in the forward / reverse arc rotation drive mode without excessive or insufficient changes in the selection conditions and drive load due to elapsed time.

  It is practically used in a drum-type washing machine in which a rotating drum is installed in a horizontal direction or at an inclination, and it is possible to eliminate tangling, twisting, and wrinkles that are strongly brazed after the dehydration process.

It is sectional drawing which shows the principal part structure of the drum type washing machine which concerns on embodiment of this invention. It is the rear view which looked at the inside of the drum type washing machine of FIG. It is sectional drawing which shows the substantially half part of the motor attachment part of the drum type washing machine of FIG. (A) Process drawing of the forward / reverse arc rotation drive mode in the drum type washing machine of FIG. 1, (b) It is explanatory drawing which shows the right-and-left interchange of the lifting position and dropping position of the laundry. FIG. 3 is an analysis diagram of rotational characteristics with respect to the sticking and peeling of the laundry on the inner surface of the rotating drum for ideally realizing the forward and reverse arc rotation driving mode in the drum type washing machine of FIG. 1. It is a graph which shows one example of the combination pattern of the normal / reverse continuous rotation drive mode and the normal / reverse arc rotation drive mode in the drum type washing machine of FIG. It is a graph which shows another example of the combination pattern of the normal / reverse continuous rotation drive mode and the normal / reverse arc rotation drive mode in the drum type washing machine of FIG. FIG. 8 is a copy diagram showing two state examples of the laundry after the forward / reverse arc rotation drive mode in the embodiment shown in FIGS. It is a copy figure which shows two example states of the laundry after the spin-drying | dehydration process in the drum type washing machine which concerns on a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Case 2 Water tank 3 Hole 4 Rotating drum 5 Motor 6 Door 7 Water supply system 9 Control board 11 Drain system 12 Blower 13 Drying system 14 Operation panel

  In the present invention, a rotating drum formed in a bottomed cylindrical shape is installed in a water tank so that the direction of the rotation axis is horizontal or inclined downward from the horizontal direction from the front side to the open side to the back side as the bottom. The present invention relates to a drum type washing machine for washing laundry stored in a rotating drum by rotationally driving the rotating drum.

  Referring to FIG. 1 showing an embodiment of the present invention, such a drum type washing machine has a rotating drum 4 in which a number of holes 3 are formed in a water tank 2 supported by a suspension structure in a housing 1. The rotary drum 4 is rotationally driven by a motor 5 and opens a door 6 that can be opened and closed on the front side of the housing 1 to pass through the front opening of the water tank 2 and the front opening of the rotary drum 4. The laundry can be taken in and out of the rotary drum 4.

  In the conventional normal washing mode, when the door 6 is opened and the laundry is put into the rotating drum 4 and the operation is started with the introduction of the detergent, the water tank 2 is supplied with water from the water supply system 7 and supplied. A required amount of water is also supplied into the rotary drum 4 through the holes 3. When the rotary drum 4 is rotated by the motor 5 at a rotational speed of, for example, about 50 rpm, the laundry stored in the rotary drum 4 is hooked on the stirring protrusion 8 provided on the inner peripheral surface of the rotary drum 4 and rotated. When the laundry is lifted in the direction and dropped from an appropriate height, the laundry is washed by applying the action of tapping. After this washing process, the dirty washing water is drained by the drainage system 11, and the rinsing process is performed using the newly supplied water. When the rinsing process is completed, the rotating drum 4 is rotated at a high speed of about 1000 rpm, for example. A dehydration step is performed. These steps are automatically executed based on a predetermined control procedure. In addition, as shown in FIG. 1, the air in the water tank 2 and the rotating drum 4 is sucked by the blower 12 and dehumidification and heating are sequentially performed, and the air is repeatedly blown into the water tank 2 and the rotating drum 4 as dry high temperature air. In a drum type washing machine called a drum type washing and drying machine equipped with the system 13, a drying process is automatically executed after the dehydration process.

By the way, the laundry may be entangled or stuck as shown in FIG. 9 (a) by continuous rotation of the washing process and the rinsing process, particularly by continuous rotation of the rotating drum at the high speed in the dehydration process. It has already been a technical problem (see, for example, Patent Document 1). Patent Document 1 utilizes the improvement in the degree of freedom of rotation control by direct coupling drive by a motor of the rotating drum, and the rotating drum is moved to a minute degree of 90 degrees or less after the dehydration process. Within the rotation angle, the laundry stuck in the rotating drum is peeled off or rotated as shown in FIG. 9 (b) by rotating forward and backward multiple times, particularly at a minute rotation angle of 10 degrees or more and less than 30 degrees. Disclosure of technology that can unravel the laundry that has been hardened at the top of the drum, eliminate imbalance during dehydration, and improve the ease of taking out laundry after drying Yes.
JP 2000-254385 A

However, forward and reverse alternating minute angular rotation performed by the technique described in Patent Document 1 after the dehydration step is performed at a speed of about 55 rpm at which the laundry as disclosed in the examples can be sufficiently adhered to the inner surface of the rotating drum. However, it is only necessary to rotate forward and backward a plurality of times within a minute rotation angle of 90 degrees or less, particularly at a minute rotation angle of 10 degrees or more and less than 30 degrees. Since it cannot be performed at a constant speed, only the area below the small angle in the middle is the predetermined speed, and before and after that, the speed increases toward the predetermined speed or decelerates from the predetermined speed, so the laundry is lifted only to a position below the small angle. I can't. As a result, even if there is a sudden deceleration due to braking at the end of the minute angle rotation and the forced peeling force from the inner surface of the rotating drum acts due to the inertia of the laundry, the laundry rotates because it is in the direction against gravity. The tendency to slide down rather than peel off in the direction away from the inner surface of the drum becomes stronger. Accordingly, the laundry that slides down is moved in the sliding-down direction by the next minute rotation of the rotating drum in the opposite direction. This is repeated thereafter, but the laundry is swung to the left and right with the sliding-down on the end side by forward / reverse rotation of the rotating drum at a small angle, and the position of the laundry is not changed so much. Even if the sticking to the inner surface of the rotating drum can be eliminated, the dehydration process is performed. The tangling, twisting, and twisting effects in the washing process and the rinsing process are not sufficient for solving the entanglement and twisting of the laundry that is strongly pressed against the inner surface of the rotating drum in a state of twisting and sticking. For this reason, it is difficult to take out the laundry because the effect of untangling and twisting is insufficient, and it is troublesome because post-processing is required to unwind and spread it. In particular, it takes time and effort to stretch twisted wrinkles and wrinkles after drying.

  An object of the present invention is to provide a drum-type washing machine that can sufficiently eliminate wrinkles and twists of the laundry after the dehydration step and reduce wrinkles and obtain a high finished state.

In order to achieve the above object, the drum type washing machine according to the present invention is configured so that a rotating drum that is formed in a bottomed cylindrical shape and is driven to rotate by a motor is rotated in the direction of the rotation axis from the front side to the bottom side. Is a drum type washing machine having a control device that is installed in a water tank so as to be inclined downward from the horizontal or horizontal direction, and controls each of the motors and the like to execute each step of washing, rinsing, dehydrating, etc. said controller, after completion of the dehydration step, the motor is Kyuko rotating the rotary drum by causing sudden driven, the laundry is the rotary drum inner surface by centrifugal force due to sudden pivot rotation of said rotary drum when lifted to a position of less than 180 degrees beyond the maximum 90 degrees from the lowest position of the rotary drum stick, the sudden braking of the rotation of the motor, the laundry is its inertia and own weight The operation to fall more side lift side opposite to the lower range of the rotary drum together with the peeled from the rotating drum inner surface, that it has to execute a forward and reverse pivot rotation drive mode to repeat the normal and reverse alternate 1 It has one feature.

  According to such a feature, when the forward / reverse arc rotation drive mode is executed, the laundry is attached to the inner surface of the rotating drum and lifted from the lowest position to more than 90 degrees and less than 180 degrees to lift the laundry. The sudden braking at the final stage of the product causes a braking condition, and the laundry is forcibly removed from the inner surface of the rotating drum due to its inertia and its own weight, and it is reliably achieved that it falls to the side opposite to the lifting side of the lower range of the rotating drum It is possible to change the lifting position and the falling position of the laundry alternately left and right in each arc rotation drive by forward and reverse alternating rapid arc rotation drive, so that the washing action of the laundry can be enhanced and the mechanical force is applied to the laundry Can affect. Therefore, by executing this forward / reverse arc rotation drive mode after the dehydration process, the laundry is strongly pressed against the inner surface of the rotating drum in the dehydration process in the state of entanglement, twisting, and wrinkles at the end of the washing process and the rinsing process. The tendency to be stuck and strongly brazed is that the left and right positions of the laundry are switched alternately and the left and right positions of the laundry are replaced with each other. Stretching can be sufficiently achieved by hitting the object when it is dropped.

Here, at the end of the normal dehydration process, the laundry is in a state of being strongly pressed and stuck to the inner surface of the rotating drum almost all around, and when the forward / reverse arc rotation drive mode is executed in this state The laundry attached to the upper part of the rotating drum is peeled off from the inner surface of the rotating drum by the forward / reverse arc rotation drive mode, but the laundry attached to the lower part of the rotating drum is removed. The object remains attached without being peeled off from the inner surface of the rotating drum. Therefore, in the present invention, the continuous rotation of the rotating drum at a rotational speed showing the behavior in which the laundry lifted by the rotation of the rotating drum by controlling the motor falls from the height where the weight of the laundry is superior is reversed. A forward / reverse continuous rotational drive mode that repeats alternately is provided, and the forward / reverse arc rotational drive mode is executed alternately with the forward / reverse continuous rotational drive mode or between forward / reverse switching in the forward / reverse continuous rotational drive mode. Thus, the partially peeled laundry moves around in the rotating drum, and can exert an action of peeling off the laundry as it is stuck. In addition, the forward and reverse continuous rotation drive mode may change the circumferential position of the rotating drum, so that the laundry attached to the lower part of the rotating drum may be positioned in the upper part of the rotating drum. By executing the forward / reverse arc rotation drive mode, the laundry stuck to the inner surface of the rotating drum can be surely peeled off, and as a result, the inner surface of the rotating drum is strongly pressed and stuck to the inner surface of the rotating drum. The laundry can be peeled evenly and unraveled.

Furthermore, the control device is characterized in that the maximum rotation speed of the rotating drum during forward and reverse arc rotation in the forward and reverse arc rotation drive mode is set to 50 rpm or more. Even when light laundry after dehydration is pasted to the vicinity of the degree of rotation, the sudden acceleration that sticks to the inner surface of the rotating drum prevents the laundry from slipping to the arc rotation position, thus giving the inertia corresponding to the rotational speed of the rotating drum and lifting it reliably. Peeling at the time of changing to the braking state, and thus peeling in which the left and right positions of the laundry are interchanged can be achieved more reliably.

  Further, the control device drives the motor by a second drum driving instruction not exceeding an upper limit load when the motor step-out limit is exceeded by driving the motor by the first drum driving instruction. By doing so, even if there is a difference in driving load from time to time, the lifting and peeling behavior for the laundry can be obtained as set.

  Further, the control device is characterized in that a rotation pause time is set between the forward / reverse continuous rotation drive mode and the forward / reverse arc rotation drive mode. The behavior of the object is once settled, and the behavior of the next drive mode can be obtained early without difficulty without the influence of the behavior of the rotating drum or the laundry in the previous drive mode.

  Further, the control device can change the execution ratio between the forward / reverse continuous rotation drive mode and the forward / reverse arc rotation drive mode, and the control device executes the forward / reverse continuous rotation drive mode and the forward / reverse arc rotation drive mode. By changing the ratio according to the elapsed time or the amount of laundry, for example, in the initial stage, in order to surely remove all the laundry stuck around the entire circumference of the inner surface of the rotating drum, It is preferable to increase the forward / reverse arc rotation drive mode to increase the ratio of the forward / reverse continuous rotation drive mode, and then to untangle or twist the laundry when a predetermined time elapses. By reducing and increasing the execution ratio of the forward / reverse arc rotation drive mode to the forward / reverse continuous rotation drive mode according to the amount, the laundry characteristics of the forward / reverse arc rotation drive mode can be maximized without excessive or insufficient drive load. That.

According to one aspect of the present invention , after the dehydration step is completed, the rotating drum is rapidly rotated by rapidly driving the motor, and the laundry is brought into contact with the inner surface of the rotating drum by the centrifugal force generated by the rapid arc rotation of the rotating drum. When stuck and lifted from the lowest position of the rotating drum to a position exceeding 90 degrees and less than 180 degrees, the laundry is peeled off from the inner surface of the rotating drum due to its inertia and its own weight due to the sudden braking of the rotation of the motor. In addition , by performing the forward / reverse arc rotation drive mode in which the action of dropping to the opposite side to the lifting side of the lower range of the rotating drum is performed forward and reverse alternately, the lifting position of the laundry for each arc rotation The fall position can be switched alternately left and right. Therefore, the unraveling action of the laundry can be enhanced to prevent twisting and sticking to the inner surface of the rotating drum as well as entanglement, and the laundry can be easily taken out and wrinkles can be greatly reduced. In particular, as another feature, the continuous rotation of the rotating drum at a rotating speed showing the behavior that the laundry lifted by the rotation of the rotating drum by controlling the motor falls from the height where its own weight wins alternates between forward and reverse. a normal and reverse continuous rotation drive mode for repeating a, by executing the such normal and reverse continuous rotation drive mode and normal and reverse pivot rotation drive mode after the dehydration step, strongly pressed over the entire periphery substantially to the inner surface of the rotating drum The attached laundry can be peeled evenly, and the laundry is strongly pressed against the inner surface of the rotating drum in the state of twisting, twisting, and wrinkling at the end of the washing process and rinsing process in the dehydration process. The tendency to be strongly crushed is largely eliminated by the high unraveling action, the mechanical force action, and the tapping action when the laundry falls as described above, so that the laundry can be taken out. It is easy, it is easy to post-processing. In addition, since a high finished state can be obtained, it is possible to greatly reduce the labor of stretching the heels.

  Hereinafter, a drum type washing machine according to an embodiment of the present invention will be described with reference to FIGS. 1 to 8 for the understanding of the present invention. In addition, the following description is a specific example of this invention, Comprising: The content of description of a claim is not limited.

  The drum type washing machine of the present embodiment has the basic configuration described above, and the motor 5 is controlled by a control device such as a control board 9 equipped with a microcomputer in accordance with the mode setting and control program from the operation panel 14 shown in FIG. The water supply system 7, the drainage system 11, and the drying system 13 are automatically controlled to perform at least a cleaning process, a rinsing process, and a drying process. The water supply system 7 can supply water in a timely manner as indicated by a solid arrow by opening and closing the electromagnetic valve, and the water supply can be used to supply the detergent in the detergent container into the water tank 2 in a timely manner. The drainage system 11 can drain as shown by a one-dot chain line arrow when necessary, such as at the end of the washing process or at the end of the rinsing process, by opening and closing the electromagnetic valve. The drying system 13 is a waste thread in the air introduced from the water tank 2 and the rotating drum 4 in a circulation path in which the air in the water tank 2 and the rotating drum 4 is circulated by the blower 12 as indicated by the broken-line arrows shown in FIGS. A filter 15 that collects and removes dust, a dehumidifying part 16 that dehumidifies the introduced air after dust removal, and a heating part 17 that heats the air after dehumidification to make dry high-temperature air. Located downstream, it is less susceptible to moisture. In the illustrated example, the dehumidifying unit 16 and the heating unit 17 are an evaporator and a condenser that circulate refrigerant through a compressor 18 and exchange heat with circulating air, and constitute an air conditioner 19. However, it is not limited to this.

  The rotating drum 4 is installed with the motor 5 on the water tank 2 directly connected to the rotating shaft 4a, and along with the water tank 2, the rotating shaft direction is inclined from the horizontal direction to the angle θ = 20 ± 10 degrees from the opening side to the bottom side. However, compared with the case of installation in the horizontal direction, even if the rotary drum 4 is installed at the same height, the laundry can be easily put in and out without taking an unreasonable posture in which the opening is inclined upward. In particular, from the experience of the present inventors, by setting the inclination angle θ to 20 ± 10 degrees, even if there is a difference in height from a child (excluding infants) to an adult, even a wheelchair user, laundry It is possible to obtain a state in which the operation of loading and unloading is most easily performed. Further, there is an advantage that a deep water storage state can be obtained even with a small amount of water because water supplied into the rotating drum 4 is accumulated on the back side.

  However, as described above, since the dehydration process is performed by continuous rotation at a high speed of, for example, 1000 rpm, the laundry is entangled, twisted, and twisted in the washing process and the rinsing process. Since it sticks to the inner surface and brazes it, it is difficult to take out the laundry, and it is easy to leave hard wrinkles on the laundry, which requires much labor.

  In order to cope with this, in the present embodiment, the control board 9 is used for the bottomed cylindrical rotary drum 4 installed so that the rotation axis direction is inclined downward from the horizontal direction from the opening side toward the bottom side. With respect to drive control, the rotary drum 4 is provided with a normal / reverse arc rotation drive mode that alternately repeats a sudden forward arc rotation and a sudden reverse arc rotation of more than 90 degrees and less than 200 degrees, and this forward / reverse arc rotation drive mode is provided after the dehydration step. Execute.

  With respect to the forward / reverse arc rotation drive mode, the movement of the laundry 21 at that time will be described with reference to FIG. In addition, this FIG. 4 is a schematic diagram for demonstrating the motion of the actual laundry 21, and does not limit the content of description of a claim. In such a forward / reverse arc rotation drive mode, the laundry 21 shown in FIG. 4 is circled in FIG. 4A due to the sudden forward arc rotation and the sudden reverse arc rotation of the rotating drum 4 exceeding 90 degrees and less than 200 degrees. The position is lifted from 90 degrees to less than 180 degrees from the broken line position illustrated by reference numerals 2, 4, and 6 to the solid line position.

  First, after the circled symbol 1 in FIG. 4A, at the start, as shown by the circled symbol 2 in FIG. 21 is attached to the inner surface of the rotating drum 4 and lifted. After that, as shown by a circled symbol 3 in FIG. 4A, sudden braking is applied to suddenly decelerate to a position of 165 degrees in the forward rotation direction. At this time, the laundry 21 is peeled off from the inner surface of the rotary drum 4 due to its inertia and its own weight when the rotational speed of the rotary drum 4 becomes 50 rpm or less, that is, in the vicinity of 135 degrees in the forward rotation direction. Falls towards the side opposite the lifting side. Thereafter, the rotating drum 4 rotates to near 165 degrees in the forward rotation direction due to inertia, whereby the laundry 21 rotates to near 15 degrees in the forward rotation direction.

  Next, as indicated by a circled symbol 4 in FIG. 4A, the laundry 21 is rapidly accelerated to about 85 degrees in the reverse rotation direction, that is, 50 rpm or more by rotating in the reverse rotation direction 100 degrees. Stick and lift. Thereafter, as indicated by a circled symbol 5 in FIG. 4A, sudden braking is applied and the vehicle decelerates rapidly to a position of 165 degrees in the reverse direction. At this time, the laundry 21 is peeled off from the inner surface of the rotating drum 4 due to its inertia and its own weight when the rotational speed of the rotating drum 4 becomes 50 rpm or less, that is, around 135 degrees in the reverse rotation direction. Drop toward the side opposite the lifting side. Thereafter, the rotary drum 4 rotates to 165 degrees in the reverse rotation direction due to inertia, whereby the laundry 21 rotates to near 15 degrees in the reverse rotation direction.

  Further, as indicated by a circled symbol 6 in FIG. 4A, the laundry 21 is rapidly accelerated to about 85 degrees in the forward rotation direction, that is, at a rotation speed of 100 degrees in the forward rotation direction to 50 rpm or more. Stick it on and lift it. After that, as shown by a circled symbol 3 in FIG. 4A, sudden braking is applied to suddenly decelerate to a position of 165 degrees in the forward rotation direction. At this time, the laundry 21 is peeled off from the inner surface of the rotary drum 4 due to its inertia and its own weight when the rotational speed of the rotary drum 4 becomes 50 rpm or less, that is, in the vicinity of 135 degrees in the forward rotation direction. Falls towards the side opposite the lifting side. Thereafter, the rotating drum 4 rotates to near 165 degrees in the forward rotation direction due to inertia, whereby the laundry 21 rotates to near 15 degrees in the forward rotation direction.

  That is, by performing this arc rotation drive in the order of circled signs 2, 4, 6, 4, 6,... Shown in FIG. 4 (a), the circled sign 3 shown in FIG. 5, the laundry 21 is moved from the inner surface of the rotating drum 4 due to its inertia and its own weight in a braking state for reversal of rotation that occurs in the final stage of lifting the laundry 21 in the sudden forward arc rotation and the sudden reverse arc rotation. It can be forcibly peeled off and dropped from the inner surface of the rotating drum 4 toward the side opposite to the lifting side by its own weight. In addition, the lifting position and the falling position of the laundry 21 can be alternately switched left and right as shown in FIG. The mechanical force can be exerted on the laundry 21.

  As a result, the laundry 21 is lifted up to the upper left and right sides of the rotating drum 4 alternately by the forward and reverse arc rotations of the rotating drum 4, and the braking at the final stage of lifting the laundry 21 is performed alternately. In the state, the laundry 21 is peeled off from the inner surface of the rotating drum 4 surely and instantaneously by the forced peeling force and its own weight due to its inertia, and dropped to the left and right sides of the rotating drum 4. The lifting position and the falling position are alternately switched, and the unwinding action of the laundry 21 is enhanced to prevent twisting and sticking to the inner surface of the rotating drum 4 as well as entanglement. It is possible to greatly relieve wrinkles. Further, since the mechanical force can be applied uniformly to the laundry 21 and the number of times the laundry 21 having a tapping action is dropped is greatly increased, the function of each process performed by the washing machine including the washing effect can be enhanced.

  Therefore, by executing such a forward / reverse arc rotation drive mode after the dehydration step, the laundry 21 in the dehydration step is entangled, twisted and twisted at the end of the washing step and the rinsing step. That is strongly pressed and sticked to the surface of the rotating drum 4 is peeled off from the inner surface of the rotating drum 4, the left and right positions of the laundry 21 are alternately switched, and the left and right of the laundry 21 are thereby interchanged. A high unwinding action with replacement, an action with uneven mechanical force, and a wrinkle stretch due to a tapping action when the laundry 21 is dropped can be sufficiently achieved. As a result, the laundry 21 can be easily taken out, post-processing can be facilitated, and a high finished state can be obtained to greatly reduce the labor of stretching the folds.

  Here, the sudden forward arc rotation and the sudden reverse arc rotation of the rotating drum 4 are executed by being driven and executed at a rapid acceleration by which the laundry 21 sticks to the inner surface of the rotating drum 4 up to 90 degrees. The laundry 21 does not slip to the arc rotation position due to the rapid acceleration of the light laundry 21 after being dehydrated up to about 90 degrees, which becomes easy to fall due to its own weight, to the arc rotation position. Inertia commensurate with the rotational speed is imparted and lifted to the arc rotation end position with certainty, and forced peeling in a predetermined direction at the time of change to the braking state can be achieved more reliably.

  Further, the forward / reverse switching of the rotating direction of the arc of the rotating drum 4 is performed with an abrupt braking operation when the arc rotation of the rotating drum 4 exceeds 90 degrees and less than 200 degrees, thereby ensuring that the laundry 21 is stuck. Even under conditions that satisfy the sudden acceleration, the arc rotation direction is suddenly reversed in the forward and reverse directions, and at the final stage of the arc rotation of the laundry 21, high inertia at the rapid acceleration and peeling due to its own weight are reliably achieved, and washing is performed. It is possible to suppress the time loss of applying mechanical force to the object 21. Accordingly, it is possible to prevent entanglement and twisting while mitigating each step of the washing machine in a shorter time and to reduce wrinkling.

  In view of the behavior of the laundry 21 as described above, the forward / reverse arc rotation drive mode of the present embodiment also causes the laundry 21 to move to the inner surface of the rotary drum 4 by the centrifugal force due to the sudden arc rotation of the rotary drum 4. Then, the laundry 21 is peeled off from the inner surface of the rotating drum 4 due to its inertia and its own weight by the sudden braking of the rotating drum 4 and then repeatedly driven alternately in the forward and reverse directions. Can be seen as a thing.

  More preferably, the laundry 21 is attached to the inner surface of the rotating drum 4 by the centrifugal force caused by the rapid arc rotation of the rotating drum 4 and lifted up to the upper range of the rotating drum 4, and then the rotating drum 4 is suddenly braked. Forward / reverse arc rotation in which the laundry 21 is peeled off from the inner surface of the rotating drum 4 due to its inertia and its own weight and dropped to the opposite side to the lifting side of the lower range of the rotating drum 4 due to its inertia and its own weight. A drive mode is provided, and the forward / reverse arc rotation drive mode is executed after the dehydration step.

  Also in these cases, it is preferable to repeat the sudden forward arc rotation and the sudden reverse arc rotation of the rotating drum 4 at less than 200 degrees for the reasons already described, and it is best to perform the rotation at more than 90 degrees.

Here, in the rotating drum 4 having a diameter of about 500 ± 50 mm, when the gravity is decomposed into the drum center direction and the tangential direction, the drum rotation speed in which the force in the center direction and the centrifugal force are balanced,
mrω ² = mg cos θ
As shown in FIG. 5, the result is as shown by a thick solid line indicated as “sticking level” shown in FIG. The circled code shown in FIG. 5 corresponds to the circled code shown in FIG. From the stop time indicated by the circled symbol 1 in FIG. 5 to the rotation speed of about 60 rpm in the vicinity indicated by the circled symbol 2, the laundry 21 is reliably attached. Further, the rotation angle θ of the rotating drum 4 necessary for this is less than 90 degrees, which satisfies the above-described conditions. In addition, in the above description, the lifting by laminating the laundry 21 is more than 90 degrees and less than 180 degrees of the rotating drum 4, but in this example, the rotation angle is around 165 degrees indicated by a circled symbol 2, The brake is stopped at a rotation angle of about 165 degrees that reaches a circled symbol 3 from a rotation angle of about 85 degrees, and may be peeled by about 50 rpm, which is peeled off from the inner surface of the rotating drum 4 due to the inertia and self-weight acting on the laundry 21, and a slight deceleration state. I understand.

  From such calculation and experience, the maximum rotation speed of the arc rotation in the forward / reverse arc rotation drive mode is 50 rpm or more, and the laundry 21 is not peeled off or braking is performed at the maximum rotation speed. Effectiveness by the rotational drive mode is obtained. Also, the lifted laundry 21 in the forward / reverse arc rotation drive mode can be peeled at a speed of less than 50 rpm using braking performed in the range of a rotation angle of 85 degrees to 165 degrees as shown in the illustrated example. Specifically, the forced peeling force and gravity according to the deceleration to less than 50 rpm are applied to the laundry 21 by the inertia of the laundry 21 that tries to continue the rotation at 50 rpm or higher due to the deceleration state from the arc rotation performed at 50 rpm or higher. To be dropped.

  Further, in the forward / reverse arc rotation drive mode, the initial arc rotation indicated by a circled symbol 2 in FIG. 4A is performed in the vicinity of 165 degrees as indicated by a broken line in FIG. 5, and FIG. The subsequent arc rotation shown in FIG. 5 is performed in the range of around 165 degrees to −15 degrees as shown by a solid line in FIG. As indicated by a broken line in the reference numeral 2, the laundry 21 that is stationary in the lower range of the rotary drum 4 is more than 90 degrees and less than 200 degrees, and more specifically, an arc rotation near 165 degrees on the left and right initial arc rotation side. It is ensured that it is lifted up to the upper part (around 135 degrees) and dropped on the opposite side of the rotating drum 4, specifically on the diameter line of the rotating drum 4, and the subsequent arc rotation is around 180 degrees (around 165 degrees) As a range of around −15 degrees) Specifically, while the laundry 21 that has fallen by about 30 degrees is sandwiched between about -15 degrees of inertia rotation and arc-rotated to 165 degrees on the same side of the rotating drum 4, specifically about 135 degrees. The behavior of lifting to a nearby position and dropping to the opposite side of the rotating drum 4 can be reliably achieved by obtaining a maximum drop distance that is approximately symmetrical and that is the diameter of the rotating drum 4. Thereby, the effect of unraveling and hitting the laundry 21 can be enhanced.

  According to the inventor's confirmation, when the maximum rotation speed of the arc rotation in the forward / reverse arc rotation drive mode is less than 50 rpm, the laundry 21 is rotated by the rotating drum 4 in the rotational inertia acting on the laundry 21 by the braking of the rotating drum 4. The behavior of peeling off from the inner surface of the rotating drum 4 does not occur, and the laundry 21 rotates with the rotating drum 4 while being stuck to the inner surface of the rotating drum 4 even when the rotating drum 4 is reversed.

  Furthermore, when the rotation angle of the rotating drum 4 is 90 degrees or less, the laundry 21 cannot be lifted. When the rotation angle of the rotating drum 4 is 200 degrees or more, the laundry 21 is washed when the rotating drum 4 is reversed. The article 21 passes through the position of 180 degrees (the uppermost part), and the operation such that the laundry 21 as shown in FIG.

By the way, in order to realize the forward / reverse arc rotation driving mode of the rotating drum 4 as described above, the driving load applied to the motor 5 is very large, which causes an increase in the number of poles of the motor 5. In the embodiment, as shown in FIGS. 1 and 3, an inner rotor 5b1 and an outer rotor 5b2 directly connected to a rotating shaft 4a with respect to a stator 5a fixed to the outer surface of the bottom of the water tank 2 are arranged on both the inner peripheral side and the outer peripheral side of the stator 5a. Thus, the stator 5a is allowed to act from the inner and outer circumferences, so that the drive power can be doubled without the problem of an increase in the size of the motor 5, and the forward / reverse arc rotation drive mode with sudden reversal can be executed without difficulty by the small motor 5.

  As a result, a technology capable of permanently executing the forward / reverse arc rotation drive mode with rapid reversal with a rotational speed characteristic with a good left / right balance as shown in FIG. 5 is realized, and the forward / reverse rotation of the laundry 21 is realized. In any case, the laundry 21 is dropped at approximately the same position of the rotating drum 4 indicated by the circled symbols 3 and 5, and the rotation from the time of dropping to the vicinity of −15 degrees of inertial rotation is sandwiched, and approximately the same rotation angle position of 85 degrees. (Rotation of the rotating drum 4 is 85 + 15 = 100 degrees) The laundry by the sudden braking after reaching the position of the circled signs 4 and 6 at almost the same rotation angle after reaching the pasting area of the laundry 21 in the vicinity Peeling from the rotating drum 4 is achieved. The required time from the peeling position indicated by the circled symbol 3 to the peeling position indicated by the circled symbol 5 is about 0.8 seconds, and from the peeling position indicated by the circled symbol 5 to the peeling position indicated by the circled symbol 3. The required time is about 0.8 seconds, and both are equal.

  In such a forward / reverse arc rotation drive mode, continuous rotation of the rotating drum 4 is repeated alternately forward / reversely at a rotational speed at which the laundry lifted by the rotation of the rotating drum exhibits a behavior of falling from the height at which its own weight wins. It is configured so as to be executed between the forward / reverse continuous rotation drive mode and between the forward / reverse switching in the alternate or forward / reverse continuous rotation drive mode. Usually, at the end of the dehydration process, the laundry 21 is in a state where it is strongly pressed and stuck to the inner surface of the rotating drum 4 over almost the entire circumference. In this state, the laundry 21 is rotated more than 90 degrees and less than 200 degrees. When the forward / reverse arc rotation drive mode is repeated, the attached laundry 21 located in the upper part of the rotary drum 4 is peeled off from the inner surface of the rotary drum 4 in the forward / reverse arc rotation drive mode. However, since the laundry 21 attached to the lower part of the rotating drum 4 only repeats the rotation of the rotating drum 4 exceeding 90 degrees and less than 200 degrees, it is not peeled off from the inner surface of the rotating drum 4, It remains attached. Therefore, by executing the forward / reverse continuous rotation drive mode between the forward / reverse arc rotation drive modes, the partially peeled laundry 21 moves around in the rotary drum 4, and the laundry remains in a stuck state. The action of peeling off the object 21 can be exerted. Further, there is a possibility that the laundry 21 attached to the lower part of the rotating drum 4 may be positioned in the upper part of the rotating drum 4 by changing the circumferential position of the rotating drum 4 by the forward / reverse continuous rotation driving mode. In addition, by executing the next forward / reverse arc rotation drive mode, the laundry 21 attached to the inner surface of the rotating drum 4 can be surely peeled off, so that it is strongly pressed almost entirely around the inner surface of the rotating drum 4. The laundry that has become stuck can be peeled evenly and unraveled, and the individual laundry 21 as shown in FIGS. A state is obtained. Further, when the drying process is subsequently performed, the air permeability of the laundry 21 is improved, and the laundry 21 is dried in a short time. In the drying process, the forward / reverse arc rotation drive mode and the forward / reverse continuous rotation drive mode are set. When the combination is executed, the beating action is stretched and further finished with less wrinkles, and the laundry 21 is further softer, and even with a thin cloth material product, the wrinkle is extremely low compared with the conventional one, and the finished state is very high. . With pile products, the piles stand without going to sleep, and non-woven fabric products are not scary.

  Although the motor 5 is powered up, excessive power-up is uneconomical. Therefore, when the motor 5 is driven by the first drum driving instruction and the step-out limit of the motor 5 is exceeded, the upper limit load is exceeded. The rotation of the rotating drum 4 can be obtained by driving the motor 5 in accordance with the second drum driving instruction not exceeding the range, so that the lifting and peeling behavior of the laundry 21 can be obtained as set, even if the driving load varies from time to time. The characteristics are guaranteed and the upper limit of power-up can be suppressed. For this purpose, for example, the rotational speed of the rotating drum 4 may be monitored and feedback controlled.

  In addition, by making it possible to change the driving of the rotating drum 4 according to the elapsed time or the amount of the laundry 21, for example, in the initial stage, the ratio of the forward / reverse continuous rotation driving mode is increased, and the inner surface of the rotating drum 4 is substantially reduced. The laundry 21 attached over the entire circumference is surely peeled off, and after a predetermined time has elapsed, the tangled or twisted laundry 21 can be released by increasing the forward / reverse arc rotation drive mode. Further, the rotary drum 4 can be driven optimally for the laundry corresponding to the difference in the driving load depending on the amount of the laundry 21, but various known detection methods can be used for the amount of the laundry 21 and the driving load. That's fine.

  On the other hand, as described above, the driving load in the forward / reverse arc rotation drive mode is high, and the rotating drum 4 repeats forward arc rotation and reverse arc rotation within a predetermined range. 3 is less likely to change, and a load tends to be applied to a portion located in the same lower position at all times, so that there is a problem in that the rotation shaft 4a and the bearing 10 shown in FIG. . However, while the drive load in the forward / reverse arc rotation drive mode is large, the load in the whole washing process can be reduced by executing the forward / reverse continuous rotation drive mode with a small drive load in a timely manner. It is possible to change the position of the bearing portion 4a and prevent the bearing portion 10 of the rotating shaft 4a from being reduced or prematurely rattling, and the laundry 21 in the forward / reverse continuous rotation drive mode. Tangle, twist, and wrinkle can be solved in forward and reverse arc rotation drive mode.

  Conventionally, the forward / reverse continuous rotation drive mode is repeated about 40 rpm in about forward / reverse intervals, but can be executed in combination with the forward / reverse arc rotation drive mode without changing this or in various ways. More specifically, the forward / reverse arc rotation drive mode D as shown in FIG. 6 is an α pattern executed alternately with the forward / reverse continuous rotation drive mode T, or the forward / reverse continuous rotation drive mode T as shown in FIG. It can be executed as a β, γ pattern or the like in which the number of repetitions of the forward / reverse arc rotation drive mode D in the forward / reverse arc rotation drive mode D is varied in magnitude. Accordingly, the laundry 21 in the forward / reverse continuous rotation drive mode T is reduced while the mechanical load is reduced by the combined use of the forward / reverse arc rotation drive mode D having a higher drive load and the forward / reverse continuous rotation drive mode T having a lower drive load. From the entanglement, twist, and wrinkle, the imbalance in applying mechanical force to the laundry 21 can be corrected according to the execution ratio of the forward / reverse arc rotation drive mode. In particular, after the dehydration step, the α pattern, β pattern, and γ pattern are sequentially executed to shift to the drying step, and the number of forward and reverse arc rotation repetitions in the forward and reverse arc rotation drive mode D is sequentially increased. In the beginning, the laundry 21 attached to almost the entire circumference of the inner surface of the rotating drum 4 is surely peeled off, and then the heel-stretching action is enhanced, and the laundry is released more effectively and transferred to the drying process. As described above, the drying process is efficiently performed, and the laundry 21 with less wrinkles can be obtained. In addition, by setting a rotation pause time (pause period K) between the forward / reverse continuous rotation drive mode T and the forward / reverse arc rotation drive mode D, the rotating drum 4 in the different drive modes T and D before and after is set. Then, the behavior of the laundry 21 is temporarily settled, and the behavior of the next drive mode can be obtained easily and early without being affected by the behavior of the rotary drum 4 and the laundry 21 in the previous drive mode, and the drive load is reduced. A pause time of about 1 second is sufficient.

  However, the combination pattern of both T and D modes is not limited to this, and the execution ratio of the forward / reverse arc rotation drive mode to the forward / reverse continuous rotation drive mode is reduced depending on the amount of the laundry 21. By increasing, it is possible to make the most of the unraveling characteristics of the laundry 21 in the forward / reverse arc rotation drive mode without excessive or insufficient changes in the selection conditions and drive load due to elapsed time.

  It is practically used in a drum-type washing machine in which a rotating drum is installed in a horizontal direction or at an inclination, and it is possible to eliminate tangling, twisting, and wrinkles that are strongly brazed after the dehydration process.

It is sectional drawing which shows the principal part structure of the drum type washing machine which concerns on embodiment of this invention. It is the rear view which looked at the inside of the drum type washing machine of FIG. It is sectional drawing which shows the substantially half part of the motor attachment part of the drum type washing machine of FIG. (A) Process drawing of the forward / reverse arc rotation drive mode in the drum type washing machine of FIG. 1, (b) It is explanatory drawing which shows the right-and-left interchange of the lifting position and dropping position of the laundry. FIG. 3 is an analysis diagram of rotational characteristics with respect to the sticking and peeling of the laundry on the inner surface of the rotating drum for ideally realizing the forward and reverse arc rotation driving mode in the drum type washing machine of FIG. 1. It is a graph which shows one example of the combination pattern of the normal / reverse continuous rotation drive mode and the normal / reverse arc rotation drive mode in the drum type washing machine of FIG. It is a graph which shows another example of the combination pattern of the normal / reverse continuous rotation drive mode and the normal / reverse arc rotation drive mode in the drum type washing machine of FIG. FIG. 8 is a copy diagram showing two state examples of the laundry after the forward / reverse arc rotation drive mode in the embodiment shown in FIGS. It is a copy figure which shows two example states of the laundry after the spin-drying | dehydration process in the drum type washing machine which concerns on a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Case 2 Water tank 3 Hole 4 Rotating drum 5 Motor 6 Door 7 Water supply system 9 Control board 11 Drain system 12 Blower 13 Drying system 14 Operation panel

Claims (12)

The rotating drum formed in the bottomed cylindrical shape is installed in the water tank so that the rotation axis direction is inclined horizontally or horizontally downward from the opening front side toward the back side as the bottom,
A forward / reverse arc rotation drive mode that alternately repeats a sudden forward arc rotation and a sudden reverse arc rotation of the rotating drum at more than 90 degrees and less than 200 degrees is performed, and the forward / reverse arc rotation drive mode is executed after the dehydration step. Drum-type washing machine characterized by that.   2. The drum type washing machine according to claim 1, wherein the arc rotation of the rotating drum is driven at a rapid acceleration at which the laundry adheres to the inner surface of the rotating drum by 90 degrees.   The drum type washing machine according to claim 1 or 2, wherein the forward / reverse switching of the rotation direction of the arc of the rotating drum is performed with an abrupt braking operation sandwiched between an arc rotation of the rotating drum exceeding 90 degrees and less than 200 degrees. The rotating drum formed in the bottomed cylindrical shape is installed in the water tank so that the rotation axis direction is inclined horizontally or horizontally downward from the opening front side toward the back side as the bottom,
After the laundry is attached to the inner surface of the rotating drum by the centrifugal force generated by the rapid arc rotation of the rotating drum and lifted upward, the laundry is brought into the inner surface of the rotating drum due to its inertia by sudden braking of the rotating drum. A drum-type washing machine having a forward / reverse arc rotation drive mode in which the drive for peeling and dropping is performed alternately and forward / reversely, and the forward / reverse arc rotation drive mode is performed after the dehydration step. . The rotating drum formed in the bottomed cylindrical shape is installed in the water tank so that the rotation axis direction is inclined horizontally or horizontally downward from the opening front side toward the back side as the bottom,
After the laundry is attached to the inner surface of the rotating drum by the centrifugal force generated by the sudden arc rotation of the rotating drum and lifted up to the upper range of the rotating drum, the laundry is suddenly braked by its inertia and its own weight. There is a forward / reverse arc rotation drive mode in which the drive to peel off from the inner surface of the rotary drum and drop to the side opposite to the lifting side of the lower range of the rotary drum due to its inertia and dead weight is repeated in forward and reverse directions. A drum-type washing machine characterized by executing an arc rotation drive mode.   The drum type washing machine according to claim 4 or 5, wherein the forward arc rotation and the reverse arc rotation of the rotating drum are repeated at over 90 degrees and less than 200 degrees.   7. The motor according to claim 1, wherein the motor is driven by a second drum driving instruction that does not exceed an upper limit load when the motor step-out limit is exceeded by driving the motor according to the first drum driving instruction. A drum-type washing machine as described in 1.   The drum type washing machine according to any one of claims 1 to 7, wherein the driving of the rotating drum is changed according to the elapsed time or the amount of laundry.   A forward / reverse continuous rotation drive mode that repeats continuous rotation of the rotary drum at forward and reverse rotations at a rotational speed that exhibits a behavior in which the laundry lifted by the rotation of the rotary drum falls from a height that its own weight wins; The drum type according to any one of claims 1 to 8, wherein the reverse arc rotation drive mode is executed alternately with the forward / reverse continuous rotation drive mode or between forward / reverse switching in the forward / reverse continuous rotation drive mode. Washing machine.   The drum type washing machine according to claim 9, wherein a rotation pause time is set between the forward / reverse continuous rotation drive mode and the forward / reverse arc rotation drive mode.   The drum type washing machine according to claim 9 or 10, wherein an execution ratio between the forward / reverse continuous rotation drive mode and the forward / reverse arc rotation drive mode can be changed.   The drum type washing machine according to claim 11, wherein the execution ratio between the forward / reverse continuous rotation drive mode and the forward / reverse arc rotation drive mode is changed according to the elapsed time or the amount of laundry.

Images