JP2008220620A - Drum type washing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the entanglement, twists and wrinkles of laundry and to end washing and rinsing steps without damaging a washing effect against strong stains and an energy saving property. <P>SOLUTION: In the drive of a rotary drum 4 whose rotary axis direction is made horizontal or inclined downwards from the horizontal direction from the open front surface side to the back surface side to be a bottom part, the drum type washing machine includes: a forward and reverse arc rotation drive mode of alternately repeating rapid forward arc rotation and rapid reverse arc rotation over 90 degrees and less than 200 degrees; and a forward and reverse continuous rotation drive mode of alternately repeating the continuous forward and reverse rotation of the rotary drum 4 at such a rotation speed that the laundry 21 lifted by the rotation of the rotary drum 4 falls down from the height where the gravity exceeds. In a washing step or the washing and rinsing steps, the forward and reverse arc rotation drive mode and the forward and reverse continuous rotation drive mode are alternately executed, and the execution ratio of the forward and reverse arc rotation drive mode is made lower than the execution ratio of the forward and reverse continuous rotation drive mode. <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 freely 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 is constructed so that the laundry can be taken in and out of the rotary drum 4 and includes a water supply system 7 and a drainage system 11 to wash the laundry. However, as shown in the drawing, 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 to repeatedly blow the air into the water tank 2 and the rotating drum 4 as dry high temperature air. Some have a drying function called a drum-type washing and drying machine equipped with the system 13.

  In the conventional normal washing mode, when the door 6 is opened, 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. The required amount of water is also supplied into the rotary drum 4 through the holes 3. When the rotary drum 4 is rotationally driven by the motor 5 at a predetermined rotational speed, 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 lifted in the rotational direction. When the laundry is dropped from an appropriate height, washing is performed by applying a washing action to the laundry. 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 and the dewatering process is performed. Is done. In the case of having a drying function, after the dehydration process is completed, the air in the water tank 2 and the rotary drum 4 is circulated by dehumidification and heating sequentially by the drying system 13 with stirring by the rotation of the rotary drum 4. Dry the laundry. These steps are automatically executed based on a predetermined control procedure.

By the way, it is already a technical problem that the laundry is entangled and stuck by continuous rotation of the washing process and the rinsing process, particularly by continuous rotation of the rotating drum at a high speed of, for example, 1000 rpm in the dehydration process (for example, Patent Document 1), Patent Document 1 uses an 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 rotated within a minute rotation angle of 90 degrees or less, particularly 10 By rotating forward and backward multiple times at a minute rotation angle of not less than 30 degrees and less than 30 degrees, the laundry stuck in the rotating drum is peeled off, or the laundry that is hardened at the upper part in the rotating drum is unraveled In addition, it discloses a technology that can further eliminate imbalance during dehydration and improve the ease of taking out laundry after drying.
JP 2000-254385 A

  By the way, the technique described in Patent Document 1 performs forward and reverse alternating small-angle rotation driving after the dehydration step to solve the tangling and twisting of the laundry. However, the present inventors have found the following points during various experiments and comparative studies on washing of laundry. After the washing and rinsing process, the dehydrated laundry is strongly attached to the inner surface of the rotating drum as shown in FIGS. 10 (a) and 10 (b) at the time of dehydration, thereby further strengthening the entanglement and twisted state in the washing and rinsing process. And is attached to the state shown in the figure. In addition, the laundry after dehydration is tightened and slippery, and the tangling of the laundry due to sticking during dehydration is particularly difficult to unravel and difficult to take out. Also, twists and wrinkles are difficult to unravel. Therefore, as described in Patent Document 1, it is not an effective method simply by removing entanglement, twisting, and wrinkles after dehydration. To compensate for this, the execution time of the forward / reverse minute angle rotation mode with high power consumption is extended, but the effect is difficult to improve, but the energy saving performance is lacking.

  Moreover, in the technique described in Patent Document 1, the laundry as disclosed in the embodiment is executed at a speed of about 55 rpm at which the laundry can be sufficiently adhered to the inner surface of the rotary drum, but a minute rotation angle of 90 degrees or less. In particular, it is only possible to perform forward and reverse rotation several times at a minute rotation angle of 10 degrees or more and less than 30 degrees. Only the area has a predetermined speed, and before and after the speed increases toward the predetermined speed or decelerates from the predetermined speed, the laundry can be lifted only to a position less than a small angle. As a result, even if there is a sudden deceleration due to braking or the like at the end of the minute angle rotation and a forced peeling force acts from the inner surface of the rotating drum due to the inertia of the laundry, the forced peeling force is in a direction against gravity. For this reason, the tendency for the laundry to slide down is stronger than being peeled off in a direction away from the inner surface of the rotating drum. 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. After that, the laundry repeatedly receives such behavior, but the position of the laundry is not interchanged as it is swung left and right with sliding down on the final side due to forward and reverse rotation of a small angle rotation of the rotating drum. There is not much so that it gathers at the lower part of the rotating drum and exhibits a behavior that the whole lump of laundry rolls forward and backward somewhat due to friction when sliding with the inner surface of the rotating drum. Eventually, with the technique described in Patent Document 1, even if the sticking to the inner surface of the rotating drum due to the dehydration of the laundry can be eliminated, the tangling, twisting, and wrinkle-removing effects with respect to the laundry that is strongly brazed during the dehydration are sufficient. Rather, if this is dealt with by extending the execution time, the energy saving performance is further reduced.

  On the other hand, since the present inventor has a problem that the laundry after dehydration is poorly slid and difficult to unwind and twist, the laundry in the washing and rinsing process contains water and is easily swollen and loosened easily. In the washing and rinsing process, the applicant's original forward / reverse arc rotation drive mode, which was developed separately and has a high unraveling effect, will greatly improve the tangling, twisting and wrinkling of the laundry, and the washing and rinsing process will be improved. Even if the laundry is affixed to the drum inner surface at the time of subsequent dehydration, the entanglement and twist are less than when the forward / reverse arc rotation drive mode is not performed, and the degree of wrinkles becomes lighter, In addition, a forward / reverse continuous rotation drive mode that repeats continuous rotation of the rotary drum at forward and reverse speeds at a rotational speed that shows a behavior in which the laundry that has been lifted by the rotation of the conventional rotary drum falls from a height that its weight exceeds. of Without impairing the cleaning effect against strongly contaminated with use, and have found that energy conservation achieved.

  The object of the present invention is to provide a drum-type laundry that can finish washing and rinsing processes with less tangling, twisting, and wrinkling of the laundry without deteriorating the cleaning effect against strong dirt and energy saving, based on the above knowledge. Is to provide a machine.

  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. A forward / reverse arc rotation drive mode in which the rotating drum is installed in a water tank so as to be inclined downward, and alternately repeats a sudden forward arc rotation and a sudden reverse arc rotation of more than 90 degrees and less than 200 degrees of the rotating drum, and the rotating drum A forward / reverse continuous rotation drive mode in which continuous rotation of the rotating drum at a rotational speed showing a behavior in which the laundry lifted by the rotation of the robot is dropped from a height at which its own weight wins, In the washing and rinsing step, the forward / reverse arc rotation drive mode and the forward / reverse continuous rotation drive mode are alternately executed, and the execution ratio of the forward / reverse arc rotation drive mode is set to the forward / reverse continuous rotation drive mode. Characterized by lower than the line rate.

  According to such a feature, in the washing process, or the washing and rinsing process, the laundry that has been lifted by the rotation of the rotating drum from the conventional manner has a behavior that falls from the height that its own weight exceeds. It is possible to execute a forward / reverse continuous rotation drive mode with a high cleaning effect against strong dirt, in which continuous rotation of the rotating drum at a rotational speed shown in the figure is alternately performed, and depending on execution of the forward / reverse arc rotation drive mode The laundry is attached to the inner surface of the rotating drum by a sudden forward arc rotation and a sudden reverse arc rotation of more than 90 degrees and less than 200 degrees of the rotating drum, and is lifted up to more than 90 degrees and at least less than 180 degrees, During the braking state for reversal of rotation that occurs at the final stage of lifting of the laundry in the sudden forward arc rotation and the sudden reverse arc rotation, the laundry is brought into the rotating drum by its inertia and its own weight. Can be forcibly removed from the inner surface of the rotating drum by its own weight, and can be dropped from the inner surface of the rotating drum to the side opposite to the lifting side. In particular, it can exert a particularly high unraveling action on laundry that is sufficiently swollen and loosened with water in the washing and rinsing process and that is in a slippery state. In addition, this high unwinding action in the forward / reverse arc rotation drive mode can suppress the entanglement between the laundry caused by the progress of the washing and rinsing process, so that the effective tapping in the forward / reverse arc rotation drive mode can be continued. Can be performed to enhance the cleaning and rinsing effects. Further, the forward / reverse continuous rotation drive mode and the forward / reverse arc rotation drive mode are alternately repeated in the washing process, or the washing / rinsing process. The forward / reverse arc rotation drive mode with higher power consumption than the forward / reverse continuous rotation drive mode while fully solving the tangling, twisting, and wrinkles of the laundry in the forward / reverse continuous rotation drive mode In addition, the cleaning effect for strong dirt can be enhanced with low power consumption because the execution ratio of the forward / reverse continuous rotation drive mode to the forward / reverse arc rotation drive mode is higher.

  In the above, the forward / reverse arc rotation drive mode and the forward / reverse continuous rotation drive mode are executed by switching a plurality of times, and the execution ratio is the cumulative execution ratio or before and after switching from one to the other. The execution ratio corresponding to the change in the washing conditions with the passage of time in the washing process or the washing and rinsing process varies from time to time. It is possible to select freely without impairing the above characteristics, including an execution ratio that is opposite to the above.

  In the above, further, the execution rate of the forward / reverse arc rotation drive mode with respect to the execution rate of the forward / reverse continuous rotation drive mode is approximately 15%. In addition to enhancing the effect, the cleaning effect against strong dirt can be further enhanced.

  In the above, the execution ratio of the forward / reverse arc rotation drive mode with respect to the execution ratio of the forward / reverse continuous rotation drive mode is determined according to the amount of laundry, the water level, or the elapsed time. Thus, it is possible to drive the rotating drum optimal for the laundry corresponding to the difference in the driving load depending on the amount of the laundry, the water level, or the change of the washing condition due to the progress of the washing.

  According to the present invention, in the washing process or the washing and rinsing process, by executing the forward / reverse arc rotation drive mode, the laundry is moved to the upper part on the left and right sides of the rotating drum by the sudden forward arc rotation and the sudden reverse arc rotation of the rotating drum. Lifting is performed alternately in the forward and reverse directions, and the laundry is reliably and instantaneously peeled off from the inner surface of the rotating drum by its inertia and dead weight in the braking state at the final stage of lifting the laundry, and dropped to the left and right sides of the rotating drum. By repeating, the lifting position and the falling position of the laundry can be interchanged with each other every rotation of the arc. Therefore, it is possible to enhance the lifting action for laundry that is sufficiently swollen and loose and slippery. In addition, this high unwinding action in the forward / reverse arc rotation drive mode can suppress the entanglement between the laundry caused by the progress of the washing and rinsing process, so that the effective tapping in the forward / reverse arc rotation drive mode can be continued. Can be performed to enhance the cleaning and rinsing effects. In addition, while reducing the execution ratio of the forward / reverse arc rotation drive mode with high power consumption to the forward / reverse continuous rotation drive mode to save energy without wasteful execution, the twists and wrinkles are efficiently solved as well as entanglement and dewatering is performed. However, it can be taken out easily and wrinkles can be reduced. In addition, the cleaning effect for strong stains on the laundry can be enhanced by the increase in the execution ratio of the forward / reverse continuous rotational drive mode to the forward / reverse arc rotational drive mode. From these, the cumulative execution time of both the forward and reverse arc rotation drive mode and the forward and reverse continuous rotation drive mode can be shortened, and there is also an energy saving effect in this aspect.

  Hereinafter, a drum type washing machine according to an embodiment of the present invention will be described with reference to FIGS. 1 to 9 for 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 and the drying function described above, and a control device such as a control board 9 equipped with a microcomputer according to mode setting and control program from the operation panel 14 shown in FIG. Thus, the motor 5, the water supply system 7, the drainage system 11, and the drying system 13 are automatically controlled to perform at least a washing 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 to 20 ± 10 degrees, even if there is a height difference from children (excluding infants) to adults, even wheelchair users, It is possible to obtain a state in which the work in and out 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, because the dehydration process is executed 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 is attached to the inner surface and brazed, it is difficult to take out the laundry, and post-processing is troublesome. In addition, it is easy to leave hard wrinkles on the laundry, and it takes a lot of time to remove the wrinkles.

(Washing process and rinsing process)
In order to solve the above problems, first, operations of the washing process and the rinsing process will be described. In the present embodiment, from the opening side to the bottom side, the washing process or the washing process and the rinsing process are intended to greatly improve the occurrence of entanglement and twisting and to prevent wrinkles from occurring while enhancing the function of mechanical force. In connection with the drive control by the control board 9 for the bottomed cylindrical rotary drum 4 installed so that the rotation axis direction is inclined downward from the horizontal direction, the positive arc of the rotary drum 4 exceeding 90 degrees and less than 200 degrees The forward and reverse arc rotation drive mode in which the rotation and the sudden reverse arc rotation are alternately repeated, and the rotary drum at a rotational speed showing a behavior in which the laundry lifted by the rotation of the rotary drum 4 falls from the height of its own weight. Forward / reverse continuous rotation drive mode in which continuous rotation of 4 is repeated alternately forward and reverse, and in the washing step or the washing step and the rinsing step, the forward / reverse arc rotation drive mode and the The reverse continuous rotation drive mode is alternately executed as shown in FIG. 8 in which the forward / reverse arc rotation drive mode is indicated by D and the forward / reverse continuous rotation drive mode is indicated by T. The ratio is set lower than the execution rate of the reverse continuous rotation drive mode.

  According to this, the laundry can be lifted up to more than 90 degrees and less than 180 degrees by the arc rotation and rapid braking of the rotating drum 4 exceeding 90 degrees and less than 200 degrees, and lifting the laundry. In this last stage, the braking state is caused and the laundry is peeled off from the inner surface of the rotating drum 4 due to its inertia and its own weight, and can be reliably dropped by its own weight. A particularly high unraveling action is given to the laundry that is loose and slippery, and the mechanical force can be exerted on the laundry, so that the washing performance can be enhanced. In addition, if the inventor is in a state where water and laundry are sufficiently contained in the aquarium 2, when the laundry is lifted and then dropped onto the rotating drum 4, it rotates due to resistance by water and the weight of the laundry. Since the drum 4 is sufficiently braked, the laundry is lifted up to more than 90 degrees and less than 180 degrees by arc rotation and rapid braking at a rapid speed exceeding 90 degrees and less than 180 degrees of the rotating drum 4. In addition, the cycle of forward and reverse alternating arc rotation driving is shortened, and the number of times that the mechanical force is applied to the laundry can be increased, so that the cleaning performance can be improved and it is confirmed that it is optimal. Furthermore, the forward / reverse arc rotation drive mode is established by alternately repeating the forward / reverse rapid arc rotation in the forward direction and the reverse rotation in the reverse direction. The lifting position and falling position can be switched alternately left and right in each arc rotation drive, so that it is possible to further improve the solving action while preventing the laundry from becoming tangled, and to increase the number of times the mechanical force is applied to the laundry As a result, the cleaning performance can be improved.

  In addition, in the forward / reverse arc rotation drive mode alone, tangling, twisting, wrinkles, etc. of the laundry are reduced, but the vertical position of the laundry is difficult to change and washing unevenness is likely to occur, but forward / reverse continuous By using the rotational drive mode in combination, it is possible to change the position of the laundry in the vertical direction, that is, to reduce the tangling, twisting, and wrinkle of the laundry in the forward / reverse continuous rotational drive mode, and By reducing the imbalance of the mechanical force applied to the laundry in the reverse arc rotation drive mode, the two different behaviors for the laundry being washed and rinsed by both modes, specifically by the forward and reverse arc rotation drive mode, Is a firm hand-washing behavior that reduces tangling, twisting, and wrinkles of the laundry, and depending on the forward / reverse continuous rotation drive mode, the laundry can be moved continuously to reduce unevenness. Given an effective washing behavior for uniform and strong stain.

  In particular, the forward / reverse arc rotation drive mode and the forward / reverse arc rotation drive mode are alternately repeated in the washing process or the washing / rinsing process. By reducing the execution rate for the drive mode, forward / reverse arc rotation with higher power consumption than the forward / reverse continuous rotation drive mode while fully solving the tangled, twisted, and wrinkled laundry in the forward / reverse continuous rotation drive mode The driving mode is not executed wastefully, and the cleaning effect for strong dirt can be enhanced with low power consumption due to the higher execution ratio of the forward / reverse continuous rotation drive mode to the forward / reverse arc rotation drive mode. In this way, while lowering the execution rate of the forward / reverse arc rotation drive mode with high power consumption to the forward / reverse continuous rotation drive mode to save energy without wasteful execution, the twists and wrinkles are efficiently solved as well as entanglement and dewatering. Even if it performs, it can take out easily and can reduce a wrinkle. In addition, the cleaning effect for strong stains on the laundry can be enhanced by the increase in the execution ratio of the forward / reverse continuous rotational drive mode to the forward / reverse arc rotational drive mode. From these, the cumulative execution time of both the forward and reverse arc rotation drive mode and the forward and reverse continuous rotation drive mode can be shortened, and there is also an energy saving effect in this aspect.

  The forward / reverse arc rotation drive mode and the forward / reverse continuous rotation drive mode are executed by switching a plurality of times, and the execution ratio is the cumulative execution ratio or the execution ratio before and after switching from one to the other. As a result, the execution rate corresponding to the change in the washing condition with the passage of time in the washing process or the washing and rinsing process varies from time to time, and the execution rate that is opposite to the above Can be selected freely without impairing the above characteristics. Furthermore, by determining the execution rate according to the amount of laundry, the water level, or the elapsed time, the laundry corresponding to the amount of laundry, the difference in driving load depending on the water level, or the change of the washing condition due to the progress of washing Rotating drum can be driven optimally.

  In addition, the execution rate of the forward / reverse arc rotation drive mode relative to the execution rate of the forward / reverse continuous rotation drive mode can be reduced to a maximum of about 15%, and the necessary solving effect can be obtained and the energy saving effect can be greatly enhanced, Since the execution ratio of the forward / reverse continuous rotation drive mode can be increased to a maximum of about 85%, the cleaning effect against strong dirt can be further enhanced with low power consumption. Therefore, the energy saving effect by shortening the overall washing time due to the high washing effect is also enhanced.

  Further, by setting a rotation pause time K as shown in FIG. 8 between the forward / reverse continuous rotational drive mode and the forward / reverse arc rotational drive mode, the rotary drum 4 and the laundry in different front and rear drive modes are set. Then, the behavior of the next drive mode can be obtained reasonably and quickly without being affected by the behavior of the rotary drum 4 or the laundry in the previous drive mode, and the drive load is reduced. A pause time of about 1 second is sufficient.

  Regarding the forward / reverse arc rotation drive mode in the washing step and the rinsing step, 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. The heavy laundry 21 containing water shown in FIG. 4 is brought about by sudden forward arc rotation and sudden reverse arc rotation of the rotating drum 4 exceeding 90 degrees and less than 200 degrees (more preferably, less than 180 degrees). Affixed to the inner surface of the rotating drum 4 and lifted up to a maximum of 90 degrees and less than 180 degrees from the broken line positions illustrated in circled symbols 2, 4, and 6 in FIG. In addition, by performing this arc rotation drive in the order of circled symbols 2, 4, 6, 4, 6,... Shown in FIG. 4A, the circled symbol 3 shown in FIG. As shown in FIG. 5, a sudden braking state for reversal of rotation occurs at or near the solid line position that is the final point of lifting of the laundry 21, and the inertia of the rotating drum 4 and its own weight are applied to the laundry 21. The parabola as shown by the arrow from the broken line position to the solid line position is drawn by its own weight by peeling off from the inner surface, and it can be reliably dropped to the opposite side of the rotating drum 4 in the left-right direction. In addition, the lifting position and the falling position of the laundry 21 can be alternately switched between right and left as shown in FIG. 4B in each arc rotation drive by forward and reverse alternating arc rotation drive. Moreover, the loosening action is particularly enhanced for the laundry 21 that is loose and slippery, and 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 by the arc rotation of the rotating drum 4 alternately in the forward and reverse directions, and in the sudden braking state at or near the final time of the lifting of the laundry 21. The position where the laundry 21 is lifted for every sudden forward arc rotation and sudden reverse arc rotation by repeatedly removing the laundry 21 from the inner surface of the rotating drum 4 due to its inertia and its own weight and dropping it to the left and right sides of the rotating drum 4 due to its own weight. The fall position is changed alternately left and right, 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 on the laundry 21. In addition, the mechanical force can be exerted on the laundry 21 and the number of times the laundry 21 having a hitting action can be drastically increased, so that the function of each washing machine including the washing effect can be enhanced.

  Further, the arc rotation of the rotating drum 4 is driven by the rapid acceleration that the laundry 21 sticks to the inner surface of the rotating drum 4 until the laundry 21 reaches around 90 degrees from the lowest position of the rotating drum 4. The laundry 21 cannot be followed by the rotation of the rotating drum 4 due to the lifting of the rotating drum 4 from the lowest position, and the laundry 21 can be easily dropped due to its own weight. Due to the acceleration, the laundry 21 does not slip to a predetermined lifting position. Therefore, the laundry 21 is surely lifted by applying an inertia corresponding to the rotational speed of the rotary drum 4 and peeled off at the time of changing to the sudden braking state. It is possible to more reliably achieve the left and right interchange of the lifting position and the falling position of the laundry 21 due to the fall to the side opposite to the lifting side.

  Further, the forward / reverse switching of the rotating direction of the arc of the rotating drum 4 is abruptly braked when the arc rotation of the rotating drum 4 exceeds 90 degrees and is less than 200 degrees (note that it is more preferable if it is less than 180 degrees). Since the operation is performed, the arc rotation direction of the laundry 21 is rapidly reversed in the forward and reverse directions under the condition that the rapid acceleration that guarantees the sticking of the laundry 21 is satisfied. Can be surely peeled off due to inertia at the time of sudden acceleration and dropped to the side opposite to the lifting side, and loss of mechanical force applied to the laundry 21 can be suppressed. Accordingly, it is possible to prevent entanglement and twisting while reducing the effect of each step of the washing machine in a shorter time and to reduce wrinkling.

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 time of the stop indicated by the circled symbol 1 in FIG. 5 to the rotation speed of about 50 rpm in the vicinity indicated by the circled symbol 2, the laundry 21 is reliably adhered. Further, the rotation angle of the rotating drum 4 necessary for this is a little less than 90 degrees, which satisfies the above-described conditions. In addition, in the above description, the lifting by sticking the laundry 21 is over 90 degrees of the rotating drum 4 and up to 200 degrees. However, in this example, the rotation angle is around 125 degrees indicated by the circled reference numeral 2, The solid solid line indicated as “sticking level” near 125 degrees intersects with the solid line of rotation of the rotating drum 4, and thereafter, the solid line of rotation of the rotating drum 4 is represented by the thick solid line indicated as “sticking level”. Since it is on the lower side, the maximum rotation speed is about 45 rpm, which is peeled off from the inner surface of the rotating drum 4 due to the inertia and its own weight acting on the laundry 21 by braking that stops at around the rotation angle of 140 degrees reaching the circled sign 3 from around the rotation angle of 125 degrees. It can be seen that the film is peeled off even by a slight deceleration state.

  From such calculation and experience, the maximum rotation speed of the arc rotation in the forward / reverse arc rotation drive mode is 40 rpm or more, and the laundry 21 is not peeled off or braking is performed at the maximum rotation speed. Effectiveness by drive mode is obtained. Further, the laundry 21 can be peeled off in the forward / reverse arc rotation drive mode by, for example, braking performed in a range of a rotation angle of 125 degrees to 140 degrees as shown in the illustrated example. Specifically, the forced peeling force corresponding to the deceleration to less than 40 rpm is applied to the laundry 21 due to the rotational inertia of the laundry 21 that tries to continue the rotation at 40 rpm or more due to the deceleration state from the arc rotation performed at 40 rpm or more. Given and dropped.

  Further, the initial arc rotation indicated by the circled symbol 2 in FIG. 4A in the forward / reverse arc rotation drive mode is performed in the vicinity of 140 degrees as indicated by the broken line in FIG. 5, and FIG. The subsequent arc rotation shown in FIG. 5 is performed in the range of around 140 degrees to 30 degrees as shown by the solid line in FIG. 5, so that the initial arc rotation is shown by the solid line 1 in FIG. As indicated by the broken line in FIG. 2, the laundry 21 stationary in the lower range of the rotating drum 4 is lifted up to the upper part on the left and right initial arc rotation side by arc rotation near 120 degrees and braked between 120 degrees and 140 degrees. In addition, it is ensured that it falls on the opposite side of the rotating drum 4, specifically, substantially on the diameter line of the rotating drum 4, and thereafter the arc rotation is set to 110 degrees near 140 degrees to around 30 degrees. To the left and right sides, specifically the wash that fell to the position of about 30 degrees The object 21 is lifted to the upper part on the same side of the rotating drum 4, specifically to the position of approximately 120 degrees, and dropped to the opposite side of the rotating drum 4 in a symmetrical manner and the maximum corresponding to the diameter of the rotating drum 4. Can be reliably achieved by obtaining a falling distance of. As a result, the effect of unraveling and tapping the laundry 21 can be enhanced.

  According to the inventor's confirmation, in the washing process and the rinsing process, when the maximum rotation speed of the arc rotation in the forward / reverse arc rotation drive mode is less than 40 rpm, the rotating drum 4 can be rotated even if a sudden braking operation is performed. In the inertia acting on the laundry 21 due to the braking of the drum 4, the laundry 21 does not peel off from the inner surface of the rotating drum 4, and the laundry 21 remains adhered to the inner surface of the rotating drum 4 even when the rotating drum 4 is reversed. In some cases, the rotating drum 4 may rotate together.

  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, the inner rotor 5b1 and the outer rotor 5b2 that are directly connected to the rotating shaft 4a with respect to the 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, after the laundry 21 is dropped at the same position of the rotating drum 4 indicated by the circled symbols 3 and 5 and reaches the sticking area of the laundry 21 at approximately the same rotation angle of 90 degrees from the time of the drop, The positions of the circled signs 4 and 6 are reached at the same rotation angle, and the laundry 21 is peeled off from the rotary drum 4 by sudden braking. The required time from the peeling position indicated by the circled symbol 4 to the peeling position indicated by the circled symbol 6 is about 0.8 seconds. From the peeling position indicated by the circled symbol 6 to the peeling position indicated by the circled symbol 4 The required time is about 0.8 seconds, and both are equal.

  Further, the stop or inversion for forward / reverse switching of the rotation direction of the rotating drum 4 is performed until the laundry 21 attached to the inner surface of the rotating drum 4 falls. Thereby, since the falling position of the laundry 21 has moved from the lifting side in the arc rotation direction or the continuous rotation direction to the opposite side, the falling position can be secured and lifted by the reverse arc rotation or continuous rotation can be performed. It is possible to more reliably achieve the left and right alternate switching in each arc rotation drive or continuous rotation drive of the lifting position and the falling position of the 21 to further enhance the unwinding action of the laundry 21, and to apply the mechanical force more evenly.

(Drying process)
Also, in the drying process, with respect to drive control by the control board 9 for the rotating drum 4, a forward / reverse arc rotation driving mode that alternately repeats a sudden forward arc rotation and a sudden reverse arc rotation of the rotating drum 4 exceeding 90 degrees and less than 200 degrees. And a forward / reverse continuous rotation drive mode in which the continuous rotation of the rotary drum 4 at a rotational speed showing a behavior in which the laundry 21 lifted by the rotation of the rotary drum 4 falls from a height where its own weight wins is alternately forward / reverse. As shown in FIGS. 10 (a) and 10 (b), an energy saving effect and a mechanical force equalizing effect corresponding to the execution rate of the forward / reverse continuous rotation drive mode are achieved. By removing the attached laundry 21 and the remaining entanglement, twisting and wrinkling can be solved in accordance with the execution ratio of the forward / reverse arc rotation drive mode. Specifically, depending on the forward / reverse arc rotation drive mode, the laundry 21 during the drying process has a plump finishing behavior that removes tangling, twisting, and wrinkles of the laundry 21, and depending on the forward / reverse continuous rotation drive mode, the laundry. When the laundry 21 is moved over a wide area and the position of the laundry 21 is changed, the high-temperature air sent to the laundry 21 is uniformly applied to the laundry 21 so as to reduce drying unevenness. The spread of the individual laundry 21 due to the unraveling of the individual laundry 21 and the regeneration of the fibers can be achieved with the beating action of the time, so that the finished state of the laundry 21 can be greatly enhanced on the basis of high drying performance. When the forward / reverse arc rotation drive mode and the forward / reverse continuous rotation drive mode are used in combination in the washing process, the rinsing process, and the drying process, the laundry 21 has few wrinkles and is not conspicuous as shown in FIGS. The finish is plump.

  Regarding the forward / reverse arc rotation drive mode in the drying process, the movement of the laundry 21 at that time will be described with reference to FIG. FIG. 6 is a schematic diagram for explaining the actual movement of the laundry 21. In such a forward / reverse arc rotation drive mode, even if the laundry 21 shown in FIG. 6 is lightened by dehydration due to the arc rotation of the rotating drum 4 exceeding 90 degrees and less than 200 degrees, the circle shown in FIG. The position is lifted up to more than 90 degrees and less than 180 degrees from the broken line position exemplified by the reference numerals 2, 4, and 6 to the solid line position.

  Specifically, after the circled code 1 in FIG. 6A, at the start, as shown by the circled code 2 in FIG. The laundry 21 is attached to the inner surface of the rotating drum 4 and lifted. After that, as indicated by a circled symbol 3 in FIG. 6A, sudden braking is applied and the vehicle decelerates rapidly 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. 6A, 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. 6A, sudden braking is applied to suddenly decelerate 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.

  Furthermore, as indicated by a circled symbol 6 in FIG. 6A, the laundry 21 is rapidly accelerated up 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 indicated by a circled symbol 3 in FIG. 6A, sudden braking is applied and the vehicle decelerates rapidly 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.

  In addition, by performing this arc rotation drive in the order of circled symbols 2, 4, 6, 4, 6,... Shown in FIG. 6 (a), the circled symbol 3 shown in FIG. As shown in FIG. 5, the forced peeling force due to the inertia and dead weight applied to the laundry 21 due to the deceleration or braking state for reversal of rotation occurring at or near the solid line position that is the final point of lifting of the laundry 21. A parabola as shown by an arrow from the broken line position to the solid line position can be drawn from the inner surface of the rotating drum 4 by its own weight, and can be peeled off and dropped reliably and instantaneously. In addition, the lifting position and the falling position of the laundry 21 can be alternately switched to the left and right as shown in FIG. The mechanical force can be exerted on the laundry 21.

  Even in the drying process, the arc rotation of the rotating drum 4 is caused by a rapid acceleration that the laundry 21 sticks to the inner surface of the rotating drum 4 until the laundry 21 reaches about 90 degrees from the lowest position of the rotating drum 4. To drive. As a result, the laundry 21 sticks to the inner surface of the rotary drum 4 by about 90 degrees where the laundry 21 cannot follow the rotation of the rotary drum 4 due to the lifting from the lowest position of the rotary drum 4 and easily falls due to its own weight. Due to the sudden acceleration, the laundry 21 does not slide to a predetermined lifting position. Therefore, the laundry 21 is reliably lifted by applying an inertia corresponding to the rotational speed of the rotating drum 4, and peeled off at the time of change to the braking state. It is possible to more reliably achieve the left and right interchange of the lifting position and the falling position of the laundry 21 due to the fall to the side opposite to the lifting side.

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. 7, the result is as shown by the thick solid line described as “sticking level” shown in FIG. The circled code shown in FIG. 7 corresponds to the circled code shown in FIG. From the stop time indicated by the circled symbol 1 in FIG. 7 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 sticking the laundry 21 is more than 90 degrees and up to 200 degrees of the rotating drum 4, but in this example, the rotation angle is around 165 degrees indicated by a circled symbol 2, It can be peeled off at a speed of around 50 rpm where it is peeled off from the inner surface of the rotating drum 4 due to inertia and its own weight acting on the laundry 21 due to braking that stops at a rotation angle of 165 degrees reaching the circled sign 3 from around a rotation angle of 85 degrees and even 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 forward / reverse arc rotation drive mode is obtained.

  Further, the laundry 21 can be peeled off in the forward / reverse arc rotation drive mode at a speed of less than 50 rpm using braking performed in a 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. 6A is performed in the vicinity of 165 degrees as indicated by a broken line in FIG. 7, and FIG. The subsequent arc rotation shown in FIG. 7 is performed in the range of about 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 rotating drum 4 is rotated by 90 ° to less than 200 °, more specifically, the left and right initial arc rotation sides by arc rotation near 160 °. To the upper side (near 135 degrees) and ensure that it falls 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 near 180 degrees (near 165 degrees) To the left and right sides of the rotating drum 4 Specifically, while the laundry 21 that has fallen by about 30 degrees is sandwiched between rotations of up to about −15 degrees of inertial rotation and arc-rotated to 165 degrees on the same side of the rotating drum 4, specifically about 135 The behavior of lifting to a position close to the angle 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 by the braking of the rotating drum 4 is performed even when the rotating drum 4 is suddenly braked. The rotating inertia acting on the laundry 21 does not cause the laundry 21 to peel off from the inner surface of the rotating drum 4, and the laundry 21 remains attached to the inner surface of the rotating drum 4 even when the rotating drum 4 is reversed. It may be in a state of rotating.

  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.

  Also in the forward / reverse arc rotation drive mode in the drying process, by the power-up improvement of the motor 5 described, the rapid forward arc rotation and the sudden reverse arc rotation having the right and left balanced rotation speed characteristics as shown in FIG. A technology capable of permanently executing the forward / reverse arc rotation drive mode with reversal is realized, and the laundry 21 is washed at substantially the same position of the rotating drum 4 indicated by the circled signs 3 and 5 in both the forward rotation and the reverse rotation. The article 21 is dropped, and the laundry 21 is stuck at about the same rotation angle position 85 degrees (rotation of the rotating drum 4 is 85 + 15 = 100 degrees) with the rotation from the point of fall to about −15 degrees of inertial rotation. After reaching the attachment area, the laundry 21 is peeled off from the rotating drum 4 by sudden braking after reaching the positions of the circled signs 4 and 6 at substantially the same rotation angle θ. 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.

  It is practically used in drum-type washing and drying machines with rotating drums installed horizontally or at an angle. We can fully understand the tangling, twisting, and wrinkling of laundry due to continuous rotation based on the energy saving by the low execution rate of forward and reverse arc rotation.

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 washing process and the rinsing process in the drum type washing machine of FIG. 1, (b) It is explanatory drawing which shows right-and-left interchange of the lifting position and dropping position of the laundry. FIG. 2 is a rotation characteristic diagram with respect to sticking and peeling of laundry on the inner surface of a rotating drum for ideally realizing a forward and reverse arc rotation driving mode in a washing process and a rinsing process in the drum type washing machine of FIG. 1. (A) Process drawing of the forward / reverse arc rotation drive mode in the drying process 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. It is a rotation characteristic figure with respect to the sticking and peeling of the laundry to the rotating drum inner surface for ideally implement | achieving the forward / reverse arc rotation drive mode in the drying process in the drum type washing machine of FIG. 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. FIG. 8 is a copy diagram showing two state examples of laundry when the forward / reverse arc rotation drive mode and the forward / reverse continuous rotation drive mode in the embodiment shown in FIGS. 5 and 7 are used in combination in the washing step and the drying step. 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 Drainage system 14 Operation panel

Claims (4)

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 more than 90 degrees and less than 200 degrees of the rotating drum, and a laundry that is lifted by the rotation of the rotating drum is higher in its own weight. A forward / reverse continuous rotation drive mode in which continuous rotation of the rotating drum at a rotational speed showing a falling behavior is repeated forward and backward alternately,
In the washing step or the washing and rinsing step, the forward / reverse arc rotation drive mode and the forward / reverse continuous rotation drive mode are alternately executed, and the execution ratio of the forward / reverse arc rotation drive mode is set to the forward / reverse continuous rotation drive mode. The drum-type washing machine is characterized in that it is lower than the running rate of.   The forward / reverse arc rotation drive mode and the forward / reverse continuous rotation drive mode are switched and executed a plurality of times, and the execution ratio is the cumulative execution ratio or the execution ratio before and after switching from one to the other. The drum type washing machine according to claim 1.   The drum type washing machine according to claim 1 or 2, wherein an execution ratio of the forward / reverse arc rotation drive mode with respect to an execution ratio of the forward / reverse continuous rotation drive mode is approximately 15%.   The execution ratio of the forward / reverse arc rotation drive mode with respect to the execution ratio of the forward / reverse continuous rotation drive mode is determined according to the amount of laundry, the water level, or the elapsed time. The drum-type washing machine as described.

Images